extern char hw_serial[11];
+#define task_io_account_read(n)
+#define task_io_account_write(n)
+
#endif /* _OPENSOLARIS_SYS_MISC_H_ */
#include <sys/vnode.h>
struct mount;
struct vattr;
+struct znode;
int secpolicy_nfs(cred_t *cr);
int secpolicy_zfs(cred_t *crd);
int unlocked_access(void *, int, cred_t *), void *node);
int secpolicy_vnode_create_gid(cred_t *cr);
int secpolicy_vnode_setids_setgids(vnode_t *vp, cred_t *cr, gid_t gid);
-int secpolicy_vnode_setid_retain(vnode_t *vp, cred_t *cr,
+int secpolicy_vnode_setid_retain(struct znode *zp, cred_t *cr,
boolean_t issuidroot);
void secpolicy_setid_clear(struct vattr *vap, vnode_t *vp, cred_t *cr);
int secpolicy_setid_setsticky_clear(vnode_t *vp, struct vattr *vap,
#define uio_iovcnt(uio) (uio)->uio_iovcnt
#define uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len
#define uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base
+#define uio_fault_disable(uio, set)
static inline void
uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len)
zfs_dir.h \
zfs_ioctl_compat.h \
zfs_vfsops_os.h \
- zfs_vnops.h \
+ zfs_vnops_os.h \
zfs_znode_impl.h \
zpl.h
#include <linux/types.h>
#define cond_resched() kern_yield(PRI_USER)
+#define uio_prefaultpages(size, uio) (0)
#define taskq_create_sysdc(a, b, d, e, p, dc, f) \
(taskq_create(a, b, maxclsyspri, d, e, f))
+++ /dev/null
-/*
- * Copyright (c) 2020 iXsystems, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#ifndef _SYS_ZFS_VNOPS_H_
-#define _SYS_ZFS_VNOPS_H_
-int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset,
- uint64_t size, struct vm_page **ppa, dmu_tx_t *tx);
-int dmu_read_pages(objset_t *os, uint64_t object, vm_page_t *ma, int count,
- int *rbehind, int *rahead, int last_size);
-extern int zfs_remove(znode_t *dzp, const char *name, cred_t *cr, int flags);
-extern int zfs_mkdir(znode_t *dzp, const char *dirname, vattr_t *vap,
- znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp);
-extern int zfs_rmdir(znode_t *dzp, const char *name, znode_t *cwd,
- cred_t *cr, int flags);
-extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
-extern int zfs_rename(znode_t *sdzp, const char *snm, znode_t *tdzp,
- const char *tnm, cred_t *cr, int flags);
-extern int zfs_symlink(znode_t *dzp, const char *name, vattr_t *vap,
- const char *link, znode_t **zpp, cred_t *cr, int flags);
-extern int zfs_link(znode_t *tdzp, znode_t *sp,
- const char *name, cred_t *cr, int flags);
-extern int zfs_space(znode_t *zp, int cmd, struct flock *bfp, int flag,
- offset_t offset, cred_t *cr);
-extern int zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl,
- int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp);
-extern int zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag,
- cred_t *cr);
-extern int zfs_write_simple(znode_t *zp, const void *data, size_t len,
- loff_t pos, size_t *resid);
-
-#endif
--- /dev/null
+/*
+ * Copyright (c) 2020 iXsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_FS_ZFS_VNOPS_OS_H
+#define _SYS_FS_ZFS_VNOPS_OS_H
+
+int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset,
+ uint64_t size, struct vm_page **ppa, dmu_tx_t *tx);
+int dmu_read_pages(objset_t *os, uint64_t object, vm_page_t *ma, int count,
+ int *rbehind, int *rahead, int last_size);
+extern int zfs_remove(znode_t *dzp, const char *name, cred_t *cr, int flags);
+extern int zfs_mkdir(znode_t *dzp, const char *dirname, vattr_t *vap,
+ znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp);
+extern int zfs_rmdir(znode_t *dzp, const char *name, znode_t *cwd,
+ cred_t *cr, int flags);
+extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
+extern int zfs_rename(znode_t *sdzp, const char *snm, znode_t *tdzp,
+ const char *tnm, cred_t *cr, int flags);
+extern int zfs_symlink(znode_t *dzp, const char *name, vattr_t *vap,
+ const char *link, znode_t **zpp, cred_t *cr, int flags);
+extern int zfs_link(znode_t *tdzp, znode_t *sp,
+ const char *name, cred_t *cr, int flags);
+extern int zfs_space(znode_t *zp, int cmd, struct flock *bfp, int flag,
+ offset_t offset, cred_t *cr);
+extern int zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl,
+ int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp);
+extern int zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag,
+ cred_t *cr);
+extern int zfs_write_simple(znode_t *zp, const void *data, size_t len,
+ loff_t pos, size_t *resid);
+
+#endif
#include <sys/zfs_acl.h>
#include <sys/zil.h>
#include <sys/zfs_project.h>
+#include <vm/vm_object.h>
#ifdef __cplusplus
extern "C" {
#define Z_ISBLK(type) ((type) == VBLK)
#define Z_ISCHR(type) ((type) == VCHR)
#define Z_ISLNK(type) ((type) == VLNK)
+#define Z_ISDIR(type) ((type) == VDIR)
+#define zn_has_cached_data(zp) vn_has_cached_data(ZTOV(zp))
+#define zn_rlimit_fsize(zp, uio, td) vn_rlimit_fsize(ZTOV(zp), (uio), (td))
/* Called on entry to each ZFS vnode and vfs operation */
#define ZFS_ENTER(zfsvfs) \
extern int zfs_znode_parent_and_name(struct znode *zp, struct znode **dzpp,
char *buf);
-
+extern void zfs_inode_update(struct znode *);
#ifdef __cplusplus
}
#endif
zfs_vdev_cache,
zfs_vdev_file,
zfs_vdev_mirror,
+ zfs_vnops,
zfs_zevent,
zfs_zio,
zfs_zil
boolean_t uio_fault_disable;
uint16_t uio_fmode;
uint16_t uio_extflg;
- offset_t uio_limit;
ssize_t uio_resid;
size_t uio_skip;
} uio_t;
#define uio_iovcnt(uio) (uio)->uio_iovcnt
#define uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len
#define uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base
+#define uio_fault_disable(uio, set) (uio)->uio_fault_disable = set
static inline void
uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len)
zfs_ctldir.h \
zfs_dir.h \
zfs_vfsops_os.h \
- zfs_vnops.h \
+ zfs_vnops_os.h \
zfs_znode_impl.h \
zpl.h
#include <sys/xvattr.h>
#include <sys/zpl.h>
+struct znode;
+
int secpolicy_nfs(const cred_t *);
int secpolicy_sys_config(const cred_t *, boolean_t);
int secpolicy_vnode_access2(const cred_t *, struct inode *,
int secpolicy_vnode_create_gid(const cred_t *);
int secpolicy_vnode_remove(const cred_t *);
int secpolicy_vnode_setdac(const cred_t *, uid_t);
-int secpolicy_vnode_setid_retain(const cred_t *, boolean_t);
+int secpolicy_vnode_setid_retain(struct znode *, const cred_t *, boolean_t);
int secpolicy_vnode_setids_setgids(const cred_t *, gid_t);
int secpolicy_zinject(const cred_t *);
int secpolicy_zfs(const cred_t *);
+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
- */
-
-#ifndef _SYS_FS_ZFS_VNOPS_H
-#define _SYS_FS_ZFS_VNOPS_H
-
-#include <sys/vnode.h>
-#include <sys/xvattr.h>
-#include <sys/uio.h>
-#include <sys/cred.h>
-#include <sys/fcntl.h>
-#include <sys/pathname.h>
-#include <sys/zpl.h>
-#include <sys/zfs_file.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern int zfs_open(struct inode *ip, int mode, int flag, cred_t *cr);
-extern int zfs_close(struct inode *ip, int flag, cred_t *cr);
-extern int zfs_holey(struct inode *ip, int cmd, loff_t *off);
-extern int zfs_read(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr);
-extern int zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr);
-extern int zfs_write_simple(znode_t *zp, const void *data, size_t len,
- loff_t pos, size_t *resid);
-extern int zfs_access(struct inode *ip, int mode, int flag, cred_t *cr);
-extern int zfs_lookup(znode_t *dzp, char *nm, znode_t **zpp, int flags,
- cred_t *cr, int *direntflags, pathname_t *realpnp);
-extern int zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl,
- int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp);
-extern int zfs_tmpfile(struct inode *dip, vattr_t *vapzfs, int excl,
- int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp);
-extern int zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags);
-extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
- znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp);
-extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
- cred_t *cr, int flags);
-extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
-extern int zfs_fsync(znode_t *zp, int syncflag, cred_t *cr);
-extern int zfs_getattr_fast(struct inode *ip, struct kstat *sp);
-extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
-extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
- char *tnm, cred_t *cr, int flags);
-extern int zfs_symlink(znode_t *dzp, char *name, vattr_t *vap,
- char *link, znode_t **zpp, cred_t *cr, int flags);
-extern int zfs_readlink(struct inode *ip, uio_t *uio, cred_t *cr);
-extern int zfs_link(znode_t *tdzp, znode_t *szp,
- char *name, cred_t *cr, int flags);
-extern void zfs_inactive(struct inode *ip);
-extern int zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
- offset_t offset, cred_t *cr);
-extern int zfs_fid(struct inode *ip, fid_t *fidp);
-extern int zfs_getsecattr(struct inode *ip, vsecattr_t *vsecp, int flag,
- cred_t *cr);
-extern int zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag,
- cred_t *cr);
-extern int zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages);
-extern int zfs_putpage(struct inode *ip, struct page *pp,
- struct writeback_control *wbc);
-extern int zfs_dirty_inode(struct inode *ip, int flags);
-extern int zfs_map(struct inode *ip, offset_t off, caddr_t *addrp,
- size_t len, unsigned long vm_flags);
-extern void zfs_zrele_async(znode_t *zp);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _SYS_FS_ZFS_VNOPS_H */
--- /dev/null
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_FS_ZFS_VNOPS_OS_H
+#define _SYS_FS_ZFS_VNOPS_OS_H
+
+#include <sys/vnode.h>
+#include <sys/xvattr.h>
+#include <sys/uio.h>
+#include <sys/cred.h>
+#include <sys/fcntl.h>
+#include <sys/pathname.h>
+#include <sys/zpl.h>
+#include <sys/zfs_file.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int zfs_open(struct inode *ip, int mode, int flag, cred_t *cr);
+extern int zfs_close(struct inode *ip, int flag, cred_t *cr);
+extern int zfs_holey(struct inode *ip, int cmd, loff_t *off);
+extern int zfs_write_simple(znode_t *zp, const void *data, size_t len,
+ loff_t pos, size_t *resid);
+extern int zfs_access(struct inode *ip, int mode, int flag, cred_t *cr);
+extern int zfs_lookup(znode_t *dzp, char *nm, znode_t **zpp, int flags,
+ cred_t *cr, int *direntflags, pathname_t *realpnp);
+extern int zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl,
+ int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp);
+extern int zfs_tmpfile(struct inode *dip, vattr_t *vapzfs, int excl,
+ int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp);
+extern int zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags);
+extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
+ znode_t **zpp, cred_t *cr, int flags, vsecattr_t *vsecp);
+extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
+ cred_t *cr, int flags);
+extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
+extern int zfs_getattr_fast(struct inode *ip, struct kstat *sp);
+extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
+extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
+ char *tnm, cred_t *cr, int flags);
+extern int zfs_symlink(znode_t *dzp, char *name, vattr_t *vap,
+ char *link, znode_t **zpp, cred_t *cr, int flags);
+extern int zfs_readlink(struct inode *ip, uio_t *uio, cred_t *cr);
+extern int zfs_link(znode_t *tdzp, znode_t *szp,
+ char *name, cred_t *cr, int flags);
+extern void zfs_inactive(struct inode *ip);
+extern int zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
+ offset_t offset, cred_t *cr);
+extern int zfs_fid(struct inode *ip, fid_t *fidp);
+extern int zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages);
+extern int zfs_putpage(struct inode *ip, struct page *pp,
+ struct writeback_control *wbc);
+extern int zfs_dirty_inode(struct inode *ip, int flags);
+extern int zfs_map(struct inode *ip, offset_t off, caddr_t *addrp,
+ size_t len, unsigned long vm_flags);
+extern void zfs_zrele_async(znode_t *zp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_FS_ZFS_VNOPS_H */
#define Z_ISCHR(type) S_ISCHR(type)
#define Z_ISLNK(type) S_ISLNK(type)
#define Z_ISDEV(type) (S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type))
+#define Z_ISDIR(type) S_ISDIR(type)
+
+#define zn_has_cached_data(zp) ((zp)->z_is_mapped)
+#define zn_rlimit_fsize(zp, uio, td) (0)
#define zhold(zp) igrab(ZTOI((zp)))
#define zrele(zp) iput(ZTOI((zp)))
} while (0)
#endif /* HAVE_INODE_TIMESPEC64_TIMES */
+#define ZFS_ACCESSTIME_STAMP(zfsvfs, zp)
+
struct znode;
extern int zfs_sync(struct super_block *, int, cred_t *);
zfs_stat.h \
zfs_sysfs.h \
zfs_vfsops.h \
+ zfs_vnops.h \
zfs_znode.h \
zil.h \
zil_impl.h \
--- /dev/null
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_FS_ZFS_VNOPS_H
+#define _SYS_FS_ZFS_VNOPS_H
+#include <sys/zfs_vnops_os.h>
+
+extern int zfs_fsync(znode_t *, int, cred_t *);
+extern int zfs_read(znode_t *, uio_t *, int, cred_t *);
+extern int zfs_write(znode_t *, uio_t *, int, cred_t *);
+extern int zfs_getsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr);
+extern int zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr);
+
+extern int mappedread(znode_t *, int, uio_t *);
+extern int mappedread_sf(znode_t *, int, uio_t *);
+extern void update_pages(znode_t *, int64_t, int, objset_t *, uint64_t);
+
+#endif
uio_seg_t uio_segflg; /* address space (kernel or user) */
uint16_t uio_fmode; /* file mode flags */
uint16_t uio_extflg; /* extended flags */
- offset_t uio_limit; /* u-limit (maximum byte offset) */
ssize_t uio_resid; /* residual count */
} uio_t;
#os/freebsd/spl
SRCS+= acl_common.c \
- btree.c \
callb.c \
list.c \
+ sha256c.c \
+ sha512c.c \
spl_acl.c \
spl_cmn_err.c \
spl_dtrace.c \
spl_kstat.c \
spl_misc.c \
spl_policy.c \
+ spl_procfs_list.c \
spl_string.c \
spl_sunddi.c \
spl_sysevent.c \
spl_uio.c \
spl_vfs.c \
spl_vm.c \
- spl_zone.c \
- sha256c.c \
- sha512c.c \
- spl_procfs_list.c \
- spl_zlib.c
+ spl_zlib.c \
+ spl_zone.c
.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
#os/freebsd/zfs
SRCS+= abd_os.c \
+ arc_os.c \
crypto_os.c \
dmu_os.c \
hkdf.c \
spa_os.c \
sysctl_os.c \
vdev_file.c \
- vdev_label_os.c \
vdev_geom.c \
+ vdev_label_os.c \
zfs_acl.c \
zfs_ctldir.c \
+ zfs_debug.c \
zfs_dir.c \
zfs_ioctl_compat.c \
zfs_ioctl_os.c \
- zfs_log.c \
- zfs_replay.c \
zfs_vfsops.c \
- zfs_vnops.c \
+ zfs_vnops_os.c \
zfs_znode.c \
zio_crypt.c \
zvol_os.c
SRCS+= abd.c \
aggsum.c \
arc.c \
- arc_os.c \
blkptr.c \
bplist.c \
bpobj.c \
+ btree.c \
cityhash.c \
dbuf.c \
dbuf_stats.c \
zcp_synctask.c \
zfeature.c \
zfs_byteswap.c \
- zfs_debug.c \
zfs_file_os.c \
zfs_fm.c \
zfs_fuid.c \
zfs_ioctl.c \
+ zfs_log.c \
zfs_onexit.c \
zfs_quota.c \
zfs_ratelimit.c \
+ zfs_replay.c \
zfs_rlock.c \
zfs_sa.c \
+ zfs_vnops.c \
zil.c \
zio.c \
zio_checksum.c \
CFLAGS.spl_zlib.c= -Wno-cast-qual
CFLAGS.abd.c= -Wno-cast-qual
CFLAGS.zfs_log.c= -Wno-cast-qual
-CFLAGS.zfs_vnops.c= -Wno-pointer-arith
+CFLAGS.zfs_vnops_os.c= -Wno-pointer-arith
CFLAGS.u8_textprep.c= -Wno-cast-qual
CFLAGS.zfs_fletcher.c= -Wno-cast-qual -Wno-pointer-arith
CFLAGS.zfs_fletcher_intel.c= -Wno-cast-qual -Wno-pointer-arith
#include <sys/jail.h>
#include <sys/policy.h>
#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
int
}
int
-secpolicy_vnode_setid_retain(vnode_t *vp, cred_t *cr,
+secpolicy_vnode_setid_retain(znode_t *zp, cred_t *cr,
boolean_t issuidroot __unused)
{
- if (secpolicy_fs_owner(vp->v_mount, cr) == 0)
+ if (secpolicy_fs_owner(ZTOV(zp)->v_mount, cr) == 0)
return (0);
return (spl_priv_check_cred(cr, PRIV_VFS_RETAINSUGID));
}
SYSCTL_NODE(_vfs_zfs, OID_AUTO, trim, CTLFLAG_RW, 0, "ZFS TRIM");
SYSCTL_NODE(_vfs_zfs, OID_AUTO, txg, CTLFLAG_RW, 0, "ZFS transaction group");
SYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV");
+SYSCTL_NODE(_vfs_zfs, OID_AUTO, vnops, CTLFLAG_RW, 0, "ZFS VNOPS");
SYSCTL_NODE(_vfs_zfs, OID_AUTO, zevent, CTLFLAG_RW, 0, "ZFS event");
SYSCTL_NODE(_vfs_zfs, OID_AUTO, zil, CTLFLAG_RW, 0, "ZFS ZIL");
SYSCTL_NODE(_vfs_zfs, OID_AUTO, zio, CTLFLAG_RW, 0, "ZFS ZIO");
+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
- * Copyright (c) 2014 Integros [integros.com]
- * Copyright 2017 Nexenta Systems, Inc.
- */
-
-/* Portions Copyright 2007 Jeremy Teo */
-/* Portions Copyright 2010 Robert Milkowski */
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/systm.h>
-#include <sys/sysmacros.h>
-#include <sys/resource.h>
-#include <sys/vfs.h>
-#include <sys/endian.h>
-#include <sys/vm.h>
-#include <sys/vnode.h>
-#if __FreeBSD_version >= 1300102
-#include <sys/smr.h>
-#endif
-#include <sys/dirent.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/kmem.h>
-#include <sys/taskq.h>
-#include <sys/uio.h>
-#include <sys/atomic.h>
-#include <sys/namei.h>
-#include <sys/mman.h>
-#include <sys/cmn_err.h>
-#include <sys/kdb.h>
-#include <sys/sysproto.h>
-#include <sys/errno.h>
-#include <sys/unistd.h>
-#include <sys/zfs_dir.h>
-#include <sys/zfs_ioctl.h>
-#include <sys/fs/zfs.h>
-#include <sys/dmu.h>
-#include <sys/dmu_objset.h>
-#include <sys/spa.h>
-#include <sys/txg.h>
-#include <sys/dbuf.h>
-#include <sys/zap.h>
-#include <sys/sa.h>
-#include <sys/policy.h>
-#include <sys/sunddi.h>
-#include <sys/filio.h>
-#include <sys/sid.h>
-#include <sys/zfs_ctldir.h>
-#include <sys/zfs_fuid.h>
-#include <sys/zfs_quota.h>
-#include <sys/zfs_sa.h>
-#include <sys/zfs_rlock.h>
-#include <sys/extdirent.h>
-#include <sys/bio.h>
-#include <sys/buf.h>
-#include <sys/sched.h>
-#include <sys/acl.h>
-#include <sys/vmmeter.h>
-#include <vm/vm_param.h>
-#include <sys/zil.h>
-#include <sys/zfs_vnops.h>
-
-#include <vm/vm_object.h>
-
-#include <sys/extattr.h>
-#include <sys/priv.h>
-
-#ifndef VN_OPEN_INVFS
-#define VN_OPEN_INVFS 0x0
-#endif
-
-VFS_SMR_DECLARE;
-
-#if __FreeBSD_version >= 1300047
-#define vm_page_wire_lock(pp)
-#define vm_page_wire_unlock(pp)
-#else
-#define vm_page_wire_lock(pp) vm_page_lock(pp)
-#define vm_page_wire_unlock(pp) vm_page_unlock(pp)
-#endif
-
-#ifdef DEBUG_VFS_LOCKS
-#define VNCHECKREF(vp) \
- VNASSERT((vp)->v_holdcnt > 0 && (vp)->v_usecount > 0, vp, \
- ("%s: wrong ref counts", __func__));
-#else
-#define VNCHECKREF(vp)
-#endif
-
-/*
- * Programming rules.
- *
- * Each vnode op performs some logical unit of work. To do this, the ZPL must
- * properly lock its in-core state, create a DMU transaction, do the work,
- * record this work in the intent log (ZIL), commit the DMU transaction,
- * and wait for the intent log to commit if it is a synchronous operation.
- * Moreover, the vnode ops must work in both normal and log replay context.
- * The ordering of events is important to avoid deadlocks and references
- * to freed memory. The example below illustrates the following Big Rules:
- *
- * (1) A check must be made in each zfs thread for a mounted file system.
- * This is done avoiding races using ZFS_ENTER(zfsvfs).
- * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
- * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
- * can return EIO from the calling function.
- *
- * (2) VN_RELE() should always be the last thing except for zil_commit()
- * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
- * First, if it's the last reference, the vnode/znode
- * can be freed, so the zp may point to freed memory. Second, the last
- * reference will call zfs_zinactive(), which may induce a lot of work --
- * pushing cached pages (which acquires range locks) and syncing out
- * cached atime changes. Third, zfs_zinactive() may require a new tx,
- * which could deadlock the system if you were already holding one.
- * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC().
- *
- * (3) All range locks must be grabbed before calling dmu_tx_assign(),
- * as they can span dmu_tx_assign() calls.
- *
- * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to
- * dmu_tx_assign(). This is critical because we don't want to block
- * while holding locks.
- *
- * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This
- * reduces lock contention and CPU usage when we must wait (note that if
- * throughput is constrained by the storage, nearly every transaction
- * must wait).
- *
- * Note, in particular, that if a lock is sometimes acquired before
- * the tx assigns, and sometimes after (e.g. z_lock), then failing
- * to use a non-blocking assign can deadlock the system. The scenario:
- *
- * Thread A has grabbed a lock before calling dmu_tx_assign().
- * Thread B is in an already-assigned tx, and blocks for this lock.
- * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
- * forever, because the previous txg can't quiesce until B's tx commits.
- *
- * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
- * then drop all locks, call dmu_tx_wait(), and try again. On subsequent
- * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT,
- * to indicate that this operation has already called dmu_tx_wait().
- * This will ensure that we don't retry forever, waiting a short bit
- * each time.
- *
- * (5) If the operation succeeded, generate the intent log entry for it
- * before dropping locks. This ensures that the ordering of events
- * in the intent log matches the order in which they actually occurred.
- * During ZIL replay the zfs_log_* functions will update the sequence
- * number to indicate the zil transaction has replayed.
- *
- * (6) At the end of each vnode op, the DMU tx must always commit,
- * regardless of whether there were any errors.
- *
- * (7) After dropping all locks, invoke zil_commit(zilog, foid)
- * to ensure that synchronous semantics are provided when necessary.
- *
- * In general, this is how things should be ordered in each vnode op:
- *
- * ZFS_ENTER(zfsvfs); // exit if unmounted
- * top:
- * zfs_dirent_lookup(&dl, ...) // lock directory entry (may VN_HOLD())
- * rw_enter(...); // grab any other locks you need
- * tx = dmu_tx_create(...); // get DMU tx
- * dmu_tx_hold_*(); // hold each object you might modify
- * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- * if (error) {
- * rw_exit(...); // drop locks
- * zfs_dirent_unlock(dl); // unlock directory entry
- * VN_RELE(...); // release held vnodes
- * if (error == ERESTART) {
- * waited = B_TRUE;
- * dmu_tx_wait(tx);
- * dmu_tx_abort(tx);
- * goto top;
- * }
- * dmu_tx_abort(tx); // abort DMU tx
- * ZFS_EXIT(zfsvfs); // finished in zfs
- * return (error); // really out of space
- * }
- * error = do_real_work(); // do whatever this VOP does
- * if (error == 0)
- * zfs_log_*(...); // on success, make ZIL entry
- * dmu_tx_commit(tx); // commit DMU tx -- error or not
- * rw_exit(...); // drop locks
- * zfs_dirent_unlock(dl); // unlock directory entry
- * VN_RELE(...); // release held vnodes
- * zil_commit(zilog, foid); // synchronous when necessary
- * ZFS_EXIT(zfsvfs); // finished in zfs
- * return (error); // done, report error
- */
-
-/* ARGSUSED */
-static int
-zfs_open(vnode_t **vpp, int flag, cred_t *cr)
-{
- znode_t *zp = VTOZ(*vpp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) &&
- ((flag & FAPPEND) == 0)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
- ZTOV(zp)->v_type == VREG &&
- !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) {
- if (fs_vscan(*vpp, cr, 0) != 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EACCES));
- }
- }
-
- /* Keep a count of the synchronous opens in the znode */
- if (flag & (FSYNC | FDSYNC))
- atomic_inc_32(&zp->z_sync_cnt);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/* ARGSUSED */
-static int
-zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /* Decrement the synchronous opens in the znode */
- if ((flag & (FSYNC | FDSYNC)) && (count == 1))
- atomic_dec_32(&zp->z_sync_cnt);
-
- if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
- ZTOV(zp)->v_type == VREG &&
- !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0)
- VERIFY(fs_vscan(vp, cr, 1) == 0);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*
- * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and
- * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter.
- */
-static int
-zfs_holey(vnode_t *vp, ulong_t cmd, offset_t *off)
-{
- znode_t *zp = VTOZ(vp);
- uint64_t noff = (uint64_t)*off; /* new offset */
- uint64_t file_sz;
- int error;
- boolean_t hole;
-
- file_sz = zp->z_size;
- if (noff >= file_sz) {
- return (SET_ERROR(ENXIO));
- }
-
- if (cmd == _FIO_SEEK_HOLE)
- hole = B_TRUE;
- else
- hole = B_FALSE;
-
- error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff);
-
- if (error == ESRCH)
- return (SET_ERROR(ENXIO));
-
- /* file was dirty, so fall back to using generic logic */
- if (error == EBUSY) {
- if (hole)
- *off = file_sz;
-
- return (0);
- }
-
- /*
- * We could find a hole that begins after the logical end-of-file,
- * because dmu_offset_next() only works on whole blocks. If the
- * EOF falls mid-block, then indicate that the "virtual hole"
- * at the end of the file begins at the logical EOF, rather than
- * at the end of the last block.
- */
- if (noff > file_sz) {
- ASSERT(hole);
- noff = file_sz;
- }
-
- if (noff < *off)
- return (error);
- *off = noff;
- return (error);
-}
-
-/* ARGSUSED */
-static int
-zfs_ioctl(vnode_t *vp, ulong_t com, intptr_t data, int flag, cred_t *cred,
- int *rvalp)
-{
- offset_t off;
- int error;
- zfsvfs_t *zfsvfs;
- znode_t *zp;
-
- switch (com) {
- case _FIOFFS:
- {
- return (0);
-
- /*
- * The following two ioctls are used by bfu. Faking out,
- * necessary to avoid bfu errors.
- */
- }
- case _FIOGDIO:
- case _FIOSDIO:
- {
- return (0);
- }
-
- case _FIO_SEEK_DATA:
- case _FIO_SEEK_HOLE:
- {
- off = *(offset_t *)data;
- zp = VTOZ(vp);
- zfsvfs = zp->z_zfsvfs;
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /* offset parameter is in/out */
- error = zfs_holey(vp, com, &off);
- ZFS_EXIT(zfsvfs);
- if (error)
- return (error);
- *(offset_t *)data = off;
- return (0);
- }
- }
- return (SET_ERROR(ENOTTY));
-}
-
-static vm_page_t
-page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes)
-{
- vm_object_t obj;
- vm_page_t pp;
- int64_t end;
-
- /*
- * At present vm_page_clear_dirty extends the cleared range to DEV_BSIZE
- * aligned boundaries, if the range is not aligned. As a result a
- * DEV_BSIZE subrange with partially dirty data may get marked as clean.
- * It may happen that all DEV_BSIZE subranges are marked clean and thus
- * the whole page would be considered clean despite have some
- * dirty data.
- * For this reason we should shrink the range to DEV_BSIZE aligned
- * boundaries before calling vm_page_clear_dirty.
- */
- end = rounddown2(off + nbytes, DEV_BSIZE);
- off = roundup2(off, DEV_BSIZE);
- nbytes = end - off;
-
- obj = vp->v_object;
- zfs_vmobject_assert_wlocked_12(obj);
-#if __FreeBSD_version < 1300050
- for (;;) {
- if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL &&
- pp->valid) {
- if (vm_page_xbusied(pp)) {
- /*
- * Reference the page before unlocking and
- * sleeping so that the page daemon is less
- * likely to reclaim it.
- */
- vm_page_reference(pp);
- vm_page_lock(pp);
- zfs_vmobject_wunlock(obj);
- vm_page_busy_sleep(pp, "zfsmwb", true);
- zfs_vmobject_wlock(obj);
- continue;
- }
- vm_page_sbusy(pp);
- } else if (pp != NULL) {
- ASSERT(!pp->valid);
- pp = NULL;
- }
- if (pp != NULL) {
- ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
- vm_object_pip_add(obj, 1);
- pmap_remove_write(pp);
- if (nbytes != 0)
- vm_page_clear_dirty(pp, off, nbytes);
- }
- break;
- }
-#else
- vm_page_grab_valid_unlocked(&pp, obj, OFF_TO_IDX(start),
- VM_ALLOC_NOCREAT | VM_ALLOC_SBUSY | VM_ALLOC_NORMAL |
- VM_ALLOC_IGN_SBUSY);
- if (pp != NULL) {
- ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
- vm_object_pip_add(obj, 1);
- pmap_remove_write(pp);
- if (nbytes != 0)
- vm_page_clear_dirty(pp, off, nbytes);
- }
-#endif
- return (pp);
-}
-
-static void
-page_unbusy(vm_page_t pp)
-{
-
- vm_page_sunbusy(pp);
-#if __FreeBSD_version >= 1300041
- vm_object_pip_wakeup(pp->object);
-#else
- vm_object_pip_subtract(pp->object, 1);
-#endif
-}
-
-#if __FreeBSD_version > 1300051
-static vm_page_t
-page_hold(vnode_t *vp, int64_t start)
-{
- vm_object_t obj;
- vm_page_t m;
-
- obj = vp->v_object;
- vm_page_grab_valid_unlocked(&m, obj, OFF_TO_IDX(start),
- VM_ALLOC_NOCREAT | VM_ALLOC_WIRED | VM_ALLOC_IGN_SBUSY |
- VM_ALLOC_NOBUSY);
- return (m);
-}
-#else
-static vm_page_t
-page_hold(vnode_t *vp, int64_t start)
-{
- vm_object_t obj;
- vm_page_t pp;
-
- obj = vp->v_object;
- zfs_vmobject_assert_wlocked(obj);
-
- for (;;) {
- if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL &&
- pp->valid) {
- if (vm_page_xbusied(pp)) {
- /*
- * Reference the page before unlocking and
- * sleeping so that the page daemon is less
- * likely to reclaim it.
- */
- vm_page_reference(pp);
- vm_page_lock(pp);
- zfs_vmobject_wunlock(obj);
- vm_page_busy_sleep(pp, "zfsmwb", true);
- zfs_vmobject_wlock(obj);
- continue;
- }
-
- ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
- vm_page_wire_lock(pp);
- vm_page_hold(pp);
- vm_page_wire_unlock(pp);
-
- } else
- pp = NULL;
- break;
- }
- return (pp);
-}
-#endif
-
-static void
-page_unhold(vm_page_t pp)
-{
-
- vm_page_wire_lock(pp);
-#if __FreeBSD_version >= 1300035
- vm_page_unwire(pp, PQ_ACTIVE);
-#else
- vm_page_unhold(pp);
-#endif
- vm_page_wire_unlock(pp);
-}
-
-/*
- * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages. What this means:
- *
- * On Write: If we find a memory mapped page, we write to *both*
- * the page and the dmu buffer.
- */
-static void
-update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid,
- int segflg, dmu_tx_t *tx)
-{
- vm_object_t obj;
- struct sf_buf *sf;
- caddr_t va;
- int off;
-
- ASSERT(segflg != UIO_NOCOPY);
- ASSERT(vp->v_mount != NULL);
- obj = vp->v_object;
- ASSERT(obj != NULL);
-
- off = start & PAGEOFFSET;
- zfs_vmobject_wlock_12(obj);
-#if __FreeBSD_version >= 1300041
- vm_object_pip_add(obj, 1);
-#endif
- for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
- vm_page_t pp;
- int nbytes = imin(PAGESIZE - off, len);
-
- if ((pp = page_busy(vp, start, off, nbytes)) != NULL) {
- zfs_vmobject_wunlock_12(obj);
-
- va = zfs_map_page(pp, &sf);
- (void) dmu_read(os, oid, start+off, nbytes,
- va+off, DMU_READ_PREFETCH);
- zfs_unmap_page(sf);
-
- zfs_vmobject_wlock_12(obj);
- page_unbusy(pp);
- }
- len -= nbytes;
- off = 0;
- }
-#if __FreeBSD_version >= 1300041
- vm_object_pip_wakeup(obj);
-#else
- vm_object_pip_wakeupn(obj, 0);
-#endif
- zfs_vmobject_wunlock_12(obj);
-}
-
-/*
- * Read with UIO_NOCOPY flag means that sendfile(2) requests
- * ZFS to populate a range of page cache pages with data.
- *
- * NOTE: this function could be optimized to pre-allocate
- * all pages in advance, drain exclusive busy on all of them,
- * map them into contiguous KVA region and populate them
- * in one single dmu_read() call.
- */
-static int
-mappedread_sf(vnode_t *vp, int nbytes, uio_t *uio)
-{
- znode_t *zp = VTOZ(vp);
- objset_t *os = zp->z_zfsvfs->z_os;
- struct sf_buf *sf;
- vm_object_t obj;
- vm_page_t pp;
- int64_t start;
- caddr_t va;
- int len = nbytes;
- int error = 0;
-
- ASSERT(uio->uio_segflg == UIO_NOCOPY);
- ASSERT(vp->v_mount != NULL);
- obj = vp->v_object;
- ASSERT(obj != NULL);
- ASSERT((uio->uio_loffset & PAGEOFFSET) == 0);
-
- zfs_vmobject_wlock_12(obj);
- for (start = uio->uio_loffset; len > 0; start += PAGESIZE) {
- int bytes = MIN(PAGESIZE, len);
-
- pp = vm_page_grab_unlocked(obj, OFF_TO_IDX(start),
- VM_ALLOC_SBUSY | VM_ALLOC_NORMAL | VM_ALLOC_IGN_SBUSY);
- if (vm_page_none_valid(pp)) {
- zfs_vmobject_wunlock_12(obj);
- va = zfs_map_page(pp, &sf);
- error = dmu_read(os, zp->z_id, start, bytes, va,
- DMU_READ_PREFETCH);
- if (bytes != PAGESIZE && error == 0)
- bzero(va + bytes, PAGESIZE - bytes);
- zfs_unmap_page(sf);
- zfs_vmobject_wlock_12(obj);
-#if __FreeBSD_version >= 1300081
- if (error == 0) {
- vm_page_valid(pp);
- vm_page_activate(pp);
- vm_page_do_sunbusy(pp);
- } else {
- zfs_vmobject_wlock(obj);
- if (!vm_page_wired(pp) && pp->valid == 0 &&
- vm_page_busy_tryupgrade(pp))
- vm_page_free(pp);
- else
- vm_page_sunbusy(pp);
- zfs_vmobject_wunlock(obj);
- }
-#else
- vm_page_do_sunbusy(pp);
- vm_page_lock(pp);
- if (error) {
- if (pp->wire_count == 0 && pp->valid == 0 &&
- !vm_page_busied(pp))
- vm_page_free(pp);
- } else {
- pp->valid = VM_PAGE_BITS_ALL;
- vm_page_activate(pp);
- }
- vm_page_unlock(pp);
-#endif
- } else {
- ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
- vm_page_do_sunbusy(pp);
- }
- if (error)
- break;
- uio->uio_resid -= bytes;
- uio->uio_offset += bytes;
- len -= bytes;
- }
- zfs_vmobject_wunlock_12(obj);
- return (error);
-}
-
-/*
- * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages. What this means:
- *
- * On Read: We "read" preferentially from memory mapped pages,
- * else we default from the dmu buffer.
- *
- * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
- * the file is memory mapped.
- */
-static int
-mappedread(vnode_t *vp, int nbytes, uio_t *uio)
-{
- znode_t *zp = VTOZ(vp);
- vm_object_t obj;
- int64_t start;
- int len = nbytes;
- int off;
- int error = 0;
-
- ASSERT(vp->v_mount != NULL);
- obj = vp->v_object;
- ASSERT(obj != NULL);
-
- start = uio->uio_loffset;
- off = start & PAGEOFFSET;
- zfs_vmobject_wlock_12(obj);
- for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
- vm_page_t pp;
- uint64_t bytes = MIN(PAGESIZE - off, len);
-
- if ((pp = page_hold(vp, start))) {
- struct sf_buf *sf;
- caddr_t va;
-
- zfs_vmobject_wunlock_12(obj);
- va = zfs_map_page(pp, &sf);
- error = vn_io_fault_uiomove(va + off, bytes, uio);
- zfs_unmap_page(sf);
- zfs_vmobject_wlock_12(obj);
- page_unhold(pp);
- } else {
- zfs_vmobject_wunlock_12(obj);
- error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, bytes);
- zfs_vmobject_wlock_12(obj);
- }
- len -= bytes;
- off = 0;
- if (error)
- break;
- }
- zfs_vmobject_wunlock_12(obj);
- return (error);
-}
-
-offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */
-
-/*
- * Read bytes from specified file into supplied buffer.
- *
- * IN: vp - vnode of file to be read from.
- * uio - structure supplying read location, range info,
- * and return buffer.
- * ioflag - SYNC flags; used to provide FRSYNC semantics.
- * cr - credentials of caller.
- * ct - caller context
- *
- * OUT: uio - updated offset and range, buffer filled.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Side Effects:
- * vp - atime updated if byte count > 0
- */
-/* ARGSUSED */
-static int
-zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- ssize_t n, nbytes, start_resid;
- int error = 0;
- int64_t nread;
- zfs_locked_range_t *lr;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /* We don't copy out anything useful for directories. */
- if (vp->v_type == VDIR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EISDIR));
- }
-
- if (zp->z_pflags & ZFS_AV_QUARANTINED) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EACCES));
- }
-
- /*
- * Validate file offset
- */
- if (uio->uio_loffset < (offset_t)0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Fasttrack empty reads
- */
- if (uio->uio_resid == 0) {
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /*
- * If we're in FRSYNC mode, sync out this znode before reading it.
- */
- if (zfsvfs->z_log &&
- (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS))
- zil_commit(zfsvfs->z_log, zp->z_id);
-
- /*
- * Lock the range against changes.
- */
- lr = zfs_rangelock_enter(&zp->z_rangelock, uio->uio_loffset,
- uio->uio_resid, RL_READER);
-
- /*
- * If we are reading past end-of-file we can skip
- * to the end; but we might still need to set atime.
- */
- if (uio->uio_loffset >= zp->z_size) {
- error = 0;
- goto out;
- }
-
- ASSERT(uio->uio_loffset < zp->z_size);
- n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset);
- start_resid = n;
-
- while (n > 0) {
- nbytes = MIN(n, zfs_read_chunk_size -
- P2PHASE(uio->uio_loffset, zfs_read_chunk_size));
-
- if (uio->uio_segflg == UIO_NOCOPY)
- error = mappedread_sf(vp, nbytes, uio);
- else if (vn_has_cached_data(vp)) {
- error = mappedread(vp, nbytes, uio);
- } else {
- error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, nbytes);
- }
- if (error) {
- /* convert checksum errors into IO errors */
- if (error == ECKSUM)
- error = SET_ERROR(EIO);
- break;
- }
-
- n -= nbytes;
- }
-
- nread = start_resid - n;
- dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, nread);
-
-out:
- zfs_rangelock_exit(lr);
-
- ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Write the bytes to a file.
- *
- * IN: vp - vnode of file to be written to.
- * uio - structure supplying write location, range info,
- * and data buffer.
- * ioflag - FAPPEND, FSYNC, and/or FDSYNC. FAPPEND is
- * set if in append mode.
- * cr - credentials of caller.
- * ct - caller context (NFS/CIFS fem monitor only)
- *
- * OUT: uio - updated offset and range.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * vp - ctime|mtime updated if byte count > 0
- */
-
-/* ARGSUSED */
-static int
-zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr)
-{
- znode_t *zp = VTOZ(vp);
- rlim64_t limit = MAXOFFSET_T;
- ssize_t start_resid = uio->uio_resid;
- ssize_t tx_bytes;
- uint64_t end_size;
- dmu_buf_impl_t *db;
- dmu_tx_t *tx;
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- zilog_t *zilog;
- offset_t woff;
- ssize_t n, nbytes;
- zfs_locked_range_t *lr;
- int max_blksz = zfsvfs->z_max_blksz;
- int error = 0;
- arc_buf_t *abuf;
- iovec_t *aiov = NULL;
- xuio_t *xuio = NULL;
- int i_iov = 0;
- int iovcnt __unused = uio->uio_iovcnt;
- iovec_t *iovp = uio->uio_iov;
- int write_eof;
- int count = 0;
- sa_bulk_attr_t bulk[4];
- uint64_t mtime[2], ctime[2];
- uint64_t uid, gid, projid;
- int64_t nwritten;
-
- /*
- * Fasttrack empty write
- */
- n = start_resid;
- if (n == 0)
- return (0);
-
- if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
- limit = MAXOFFSET_T;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
- &zp->z_size, 8);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, 8);
-
- /*
- * Callers might not be able to detect properly that we are read-only,
- * so check it explicitly here.
- */
- if (zfs_is_readonly(zfsvfs)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EROFS));
- }
-
- /*
- * If immutable or not appending then return EPERM.
- * Intentionally allow ZFS_READONLY through here.
- * See zfs_zaccess_common()
- */
- if ((zp->z_pflags & ZFS_IMMUTABLE) ||
- ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) &&
- (uio->uio_loffset < zp->z_size))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- zilog = zfsvfs->z_log;
-
- /*
- * Validate file offset
- */
- woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset;
- if (woff < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * If in append mode, set the io offset pointer to eof.
- */
- if (ioflag & FAPPEND) {
- /*
- * Obtain an appending range lock to guarantee file append
- * semantics. We reset the write offset once we have the lock.
- */
- lr = zfs_rangelock_enter(&zp->z_rangelock, 0, n, RL_APPEND);
- woff = lr->lr_offset;
- if (lr->lr_length == UINT64_MAX) {
- /*
- * We overlocked the file because this write will cause
- * the file block size to increase.
- * Note that zp_size cannot change with this lock held.
- */
- woff = zp->z_size;
- }
- uio->uio_loffset = woff;
- } else {
- /*
- * Note that if the file block size will change as a result of
- * this write, then this range lock will lock the entire file
- * so that we can re-write the block safely.
- */
- lr = zfs_rangelock_enter(&zp->z_rangelock, woff, n, RL_WRITER);
- }
-
- if (vn_rlimit_fsize(vp, uio, uio->uio_td)) {
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (EFBIG);
- }
-
- if (woff >= limit) {
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EFBIG));
- }
-
- if ((woff + n) > limit || woff > (limit - n))
- n = limit - woff;
-
- /* Will this write extend the file length? */
- write_eof = (woff + n > zp->z_size);
-
- end_size = MAX(zp->z_size, woff + n);
-
- uid = zp->z_uid;
- gid = zp->z_gid;
- projid = zp->z_projid;
-
- /*
- * Write the file in reasonable size chunks. Each chunk is written
- * in a separate transaction; this keeps the intent log records small
- * and allows us to do more fine-grained space accounting.
- */
- while (n > 0) {
- woff = uio->uio_loffset;
-
- if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, uid) ||
- zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, gid) ||
- (projid != ZFS_DEFAULT_PROJID &&
- zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
- projid))) {
- error = SET_ERROR(EDQUOT);
- break;
- }
-
- abuf = NULL;
- if (xuio) {
- ASSERT(i_iov < iovcnt);
- aiov = &iovp[i_iov];
- abuf = dmu_xuio_arcbuf(xuio, i_iov);
- dmu_xuio_clear(xuio, i_iov);
- DTRACE_PROBE3(zfs_cp_write, int, i_iov,
- iovec_t *, aiov, arc_buf_t *, abuf);
- ASSERT((aiov->iov_base == abuf->b_data) ||
- ((char *)aiov->iov_base - (char *)abuf->b_data +
- aiov->iov_len == arc_buf_size(abuf)));
- i_iov++;
- } else if (n >= max_blksz &&
- woff >= zp->z_size &&
- P2PHASE(woff, max_blksz) == 0 &&
- zp->z_blksz == max_blksz) {
- /*
- * This write covers a full block. "Borrow" a buffer
- * from the dmu so that we can fill it before we enter
- * a transaction. This avoids the possibility of
- * holding up the transaction if the data copy hangs
- * up on a pagefault (e.g., from an NFS server mapping).
- */
- size_t cbytes;
-
- abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- max_blksz);
- ASSERT(abuf != NULL);
- ASSERT(arc_buf_size(abuf) == max_blksz);
- if ((error = uiocopy(abuf->b_data, max_blksz,
- UIO_WRITE, uio, &cbytes))) {
- dmu_return_arcbuf(abuf);
- break;
- }
- ASSERT(cbytes == max_blksz);
- }
-
- /*
- * Start a transaction.
- */
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- db = (dmu_buf_impl_t *)sa_get_db(zp->z_sa_hdl);
- DB_DNODE_ENTER(db);
- dmu_tx_hold_write_by_dnode(tx, DB_DNODE(db), woff,
- MIN(n, max_blksz));
- DB_DNODE_EXIT(db);
- zfs_sa_upgrade_txholds(tx, zp);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- if (abuf != NULL)
- dmu_return_arcbuf(abuf);
- break;
- }
-
- /*
- * If zfs_range_lock() over-locked we grow the blocksize
- * and then reduce the lock range. This will only happen
- * on the first iteration since zfs_range_reduce() will
- * shrink down r_len to the appropriate size.
- */
- if (lr->lr_length == UINT64_MAX) {
- uint64_t new_blksz;
-
- if (zp->z_blksz > max_blksz) {
- /*
- * File's blocksize is already larger than the
- * "recordsize" property. Only let it grow to
- * the next power of 2.
- */
- ASSERT(!ISP2(zp->z_blksz));
- new_blksz = MIN(end_size,
- 1 << highbit64(zp->z_blksz));
- } else {
- new_blksz = MIN(end_size, max_blksz);
- }
- zfs_grow_blocksize(zp, new_blksz, tx);
- zfs_rangelock_reduce(lr, woff, n);
- }
-
- /*
- * XXX - should we really limit each write to z_max_blksz?
- * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
- */
- nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
-
- if (woff + nbytes > zp->z_size)
- vnode_pager_setsize(vp, woff + nbytes);
-
- if (abuf == NULL) {
- tx_bytes = uio->uio_resid;
- error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, nbytes, tx);
- tx_bytes -= uio->uio_resid;
- } else {
- tx_bytes = nbytes;
- ASSERT(xuio == NULL || tx_bytes == aiov->iov_len);
- /*
- * If this is not a full block write, but we are
- * extending the file past EOF and this data starts
- * block-aligned, use assign_arcbuf(). Otherwise,
- * write via dmu_write().
- */
- if (tx_bytes < max_blksz && (!write_eof ||
- aiov->iov_base != abuf->b_data)) {
- ASSERT(xuio);
- dmu_write(zfsvfs->z_os, zp->z_id, woff,
- aiov->iov_len, aiov->iov_base, tx);
- dmu_return_arcbuf(abuf);
- xuio_stat_wbuf_copied();
- } else {
- ASSERT(xuio || tx_bytes == max_blksz);
- dmu_assign_arcbuf(sa_get_db(zp->z_sa_hdl), woff,
- abuf, tx);
- }
- ASSERT(tx_bytes <= uio->uio_resid);
- uioskip(uio, tx_bytes);
- }
- if (tx_bytes && vn_has_cached_data(vp)) {
- update_pages(vp, woff, tx_bytes, zfsvfs->z_os,
- zp->z_id, uio->uio_segflg, tx);
- }
-
- /*
- * If we made no progress, we're done. If we made even
- * partial progress, update the znode and ZIL accordingly.
- */
- if (tx_bytes == 0) {
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
- (void *)&zp->z_size, sizeof (uint64_t), tx);
- dmu_tx_commit(tx);
- ASSERT(error != 0);
- break;
- }
-
- /*
- * Clear Set-UID/Set-GID bits on successful write if not
- * privileged and at least one of the execute bits is set.
- *
- * It would be nice to to this after all writes have
- * been done, but that would still expose the ISUID/ISGID
- * to another app after the partial write is committed.
- *
- * Note: we don't call zfs_fuid_map_id() here because
- * user 0 is not an ephemeral uid.
- */
- mutex_enter(&zp->z_acl_lock);
- if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) |
- (S_IXUSR >> 6))) != 0 &&
- (zp->z_mode & (S_ISUID | S_ISGID)) != 0 &&
- secpolicy_vnode_setid_retain(vp, cr,
- (zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) {
- uint64_t newmode;
- zp->z_mode &= ~(S_ISUID | S_ISGID);
- newmode = zp->z_mode;
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs),
- (void *)&newmode, sizeof (uint64_t), tx);
- }
- mutex_exit(&zp->z_acl_lock);
-
- zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
-
- /*
- * Update the file size (zp_size) if it has changed;
- * account for possible concurrent updates.
- */
- while ((end_size = zp->z_size) < uio->uio_loffset) {
- (void) atomic_cas_64(&zp->z_size, end_size,
- uio->uio_loffset);
- ASSERT(error == 0 || error == EFAULT);
- }
- /*
- * If we are replaying and eof is non zero then force
- * the file size to the specified eof. Note, there's no
- * concurrency during replay.
- */
- if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0)
- zp->z_size = zfsvfs->z_replay_eof;
-
- if (error == 0)
- error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- else
- (void) sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
-
- zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes,
- ioflag, NULL, NULL);
- dmu_tx_commit(tx);
-
- if (error != 0)
- break;
- ASSERT(tx_bytes == nbytes);
- n -= nbytes;
-
- }
-
- zfs_rangelock_exit(lr);
-
- /*
- * If we're in replay mode, or we made no progress, return error.
- * Otherwise, it's at least a partial write, so it's successful.
- */
- if (zfsvfs->z_replay || uio->uio_resid == start_resid) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * EFAULT means that at least one page of the source buffer was not
- * available. VFS will re-try remaining I/O upon this error.
- */
- if (error == EFAULT) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (ioflag & (FSYNC | FDSYNC) ||
- zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, zp->z_id);
-
- nwritten = start_resid - uio->uio_resid;
- dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, nwritten);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-int
-zfs_write_simple(znode_t *zp, const void *data, size_t len,
- loff_t pos, size_t *presid)
-{
- int error = 0;
- ssize_t resid;
-
- error = vn_rdwr(UIO_WRITE, ZTOV(zp), __DECONST(void *, data), len, pos,
- UIO_SYSSPACE, IO_SYNC, kcred, NOCRED, &resid, curthread);
-
- if (error) {
- return (SET_ERROR(error));
- } else if (presid == NULL) {
- if (resid != 0) {
- error = SET_ERROR(EIO);
- }
- } else {
- *presid = resid;
- }
- return (error);
-}
-
-static void
-zfs_get_done(zgd_t *zgd, int error)
-{
- znode_t *zp = zgd->zgd_private;
- objset_t *os = zp->z_zfsvfs->z_os;
-
- if (zgd->zgd_db)
- dmu_buf_rele(zgd->zgd_db, zgd);
-
- zfs_rangelock_exit(zgd->zgd_lr);
-
- /*
- * Release the vnode asynchronously as we currently have the
- * txg stopped from syncing.
- */
- VN_RELE_ASYNC(ZTOV(zp), dsl_pool_zrele_taskq(dmu_objset_pool(os)));
-
- kmem_free(zgd, sizeof (zgd_t));
-}
-
-#ifdef ZFS_DEBUG
-static int zil_fault_io = 0;
-#endif
-
-/*
- * Get data to generate a TX_WRITE intent log record.
- */
-int
-zfs_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb, zio_t *zio)
-{
- zfsvfs_t *zfsvfs = arg;
- objset_t *os = zfsvfs->z_os;
- znode_t *zp;
- uint64_t object = lr->lr_foid;
- uint64_t offset = lr->lr_offset;
- uint64_t size = lr->lr_length;
- dmu_buf_t *db;
- zgd_t *zgd;
- int error = 0;
-
- ASSERT3P(lwb, !=, NULL);
- ASSERT3P(zio, !=, NULL);
- ASSERT3U(size, !=, 0);
-
- /*
- * Nothing to do if the file has been removed
- */
- if (zfs_zget(zfsvfs, object, &zp) != 0)
- return (SET_ERROR(ENOENT));
- if (zp->z_unlinked) {
- /*
- * Release the vnode asynchronously as we currently have the
- * txg stopped from syncing.
- */
- VN_RELE_ASYNC(ZTOV(zp),
- dsl_pool_zrele_taskq(dmu_objset_pool(os)));
- return (SET_ERROR(ENOENT));
- }
-
- zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
- zgd->zgd_lwb = lwb;
- zgd->zgd_private = zp;
-
- /*
- * Write records come in two flavors: immediate and indirect.
- * For small writes it's cheaper to store the data with the
- * log record (immediate); for large writes it's cheaper to
- * sync the data and get a pointer to it (indirect) so that
- * we don't have to write the data twice.
- */
- if (buf != NULL) { /* immediate write */
- zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock, offset,
- size, RL_READER);
- /* test for truncation needs to be done while range locked */
- if (offset >= zp->z_size) {
- error = SET_ERROR(ENOENT);
- } else {
- error = dmu_read(os, object, offset, size, buf,
- DMU_READ_NO_PREFETCH);
- }
- ASSERT(error == 0 || error == ENOENT);
- } else { /* indirect write */
- /*
- * Have to lock the whole block to ensure when it's
- * written out and its checksum is being calculated
- * that no one can change the data. We need to re-check
- * blocksize after we get the lock in case it's changed!
- */
- for (;;) {
- uint64_t blkoff;
- size = zp->z_blksz;
- blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
- offset -= blkoff;
- zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
- offset, size, RL_READER);
- if (zp->z_blksz == size)
- break;
- offset += blkoff;
- zfs_rangelock_exit(zgd->zgd_lr);
- }
- /* test for truncation needs to be done while range locked */
- if (lr->lr_offset >= zp->z_size)
- error = SET_ERROR(ENOENT);
-#ifdef ZFS_DEBUG
- if (zil_fault_io) {
- error = SET_ERROR(EIO);
- zil_fault_io = 0;
- }
-#endif
- if (error == 0)
- error = dmu_buf_hold(os, object, offset, zgd, &db,
- DMU_READ_NO_PREFETCH);
-
- if (error == 0) {
- blkptr_t *bp = &lr->lr_blkptr;
-
- zgd->zgd_db = db;
- zgd->zgd_bp = bp;
-
- ASSERT(db->db_offset == offset);
- ASSERT(db->db_size == size);
-
- error = dmu_sync(zio, lr->lr_common.lrc_txg,
- zfs_get_done, zgd);
- ASSERT(error || lr->lr_length <= size);
-
- /*
- * On success, we need to wait for the write I/O
- * initiated by dmu_sync() to complete before we can
- * release this dbuf. We will finish everything up
- * in the zfs_get_done() callback.
- */
- if (error == 0)
- return (0);
-
- if (error == EALREADY) {
- lr->lr_common.lrc_txtype = TX_WRITE2;
- /*
- * TX_WRITE2 relies on the data previously
- * written by the TX_WRITE that caused
- * EALREADY. We zero out the BP because
- * it is the old, currently-on-disk BP,
- * so there's no need to zio_flush() its
- * vdevs (flushing would needlesly hurt
- * performance, and doesn't work on
- * indirect vdevs).
- */
- zgd->zgd_bp = NULL;
- BP_ZERO(bp);
- error = 0;
- }
- }
- }
-
- zfs_get_done(zgd, error);
-
- return (error);
-}
-
-/*ARGSUSED*/
-static int
-zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr,
- caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (flag & V_ACE_MASK)
- error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
- else
- error = zfs_zaccess_rwx(zp, mode, flag, cr);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-static int
-zfs_dd_callback(struct mount *mp, void *arg, int lkflags, struct vnode **vpp)
-{
- int error;
-
- *vpp = arg;
- error = vn_lock(*vpp, lkflags);
- if (error != 0)
- vrele(*vpp);
- return (error);
-}
-
-static int
-zfs_lookup_lock(vnode_t *dvp, vnode_t *vp, const char *name, int lkflags)
-{
- znode_t *zdp = VTOZ(dvp);
- zfsvfs_t *zfsvfs __unused = zdp->z_zfsvfs;
- int error;
- int ltype;
-
- if (zfsvfs->z_replay == B_FALSE)
- ASSERT_VOP_LOCKED(dvp, __func__);
-#ifdef DIAGNOSTIC
- if ((zdp->z_pflags & ZFS_XATTR) == 0)
- VERIFY(!RRM_LOCK_HELD(&zfsvfs->z_teardown_lock));
-#endif
-
- if (name[0] == 0 || (name[0] == '.' && name[1] == 0)) {
- ASSERT3P(dvp, ==, vp);
- vref(dvp);
- ltype = lkflags & LK_TYPE_MASK;
- if (ltype != VOP_ISLOCKED(dvp)) {
- if (ltype == LK_EXCLUSIVE)
- vn_lock(dvp, LK_UPGRADE | LK_RETRY);
- else /* if (ltype == LK_SHARED) */
- vn_lock(dvp, LK_DOWNGRADE | LK_RETRY);
-
- /*
- * Relock for the "." case could leave us with
- * reclaimed vnode.
- */
- if (VN_IS_DOOMED(dvp)) {
- vrele(dvp);
- return (SET_ERROR(ENOENT));
- }
- }
- return (0);
- } else if (name[0] == '.' && name[1] == '.' && name[2] == 0) {
- /*
- * Note that in this case, dvp is the child vnode, and we
- * are looking up the parent vnode - exactly reverse from
- * normal operation. Unlocking dvp requires some rather
- * tricky unlock/relock dance to prevent mp from being freed;
- * use vn_vget_ino_gen() which takes care of all that.
- *
- * XXX Note that there is a time window when both vnodes are
- * unlocked. It is possible, although highly unlikely, that
- * during that window the parent-child relationship between
- * the vnodes may change, for example, get reversed.
- * In that case we would have a wrong lock order for the vnodes.
- * All other filesystems seem to ignore this problem, so we
- * do the same here.
- * A potential solution could be implemented as follows:
- * - using LK_NOWAIT when locking the second vnode and retrying
- * if necessary
- * - checking that the parent-child relationship still holds
- * after locking both vnodes and retrying if it doesn't
- */
- error = vn_vget_ino_gen(dvp, zfs_dd_callback, vp, lkflags, &vp);
- return (error);
- } else {
- error = vn_lock(vp, lkflags);
- if (error != 0)
- vrele(vp);
- return (error);
- }
-}
-
-/*
- * Lookup an entry in a directory, or an extended attribute directory.
- * If it exists, return a held vnode reference for it.
- *
- * IN: dvp - vnode of directory to search.
- * nm - name of entry to lookup.
- * pnp - full pathname to lookup [UNUSED].
- * flags - LOOKUP_XATTR set if looking for an attribute.
- * rdir - root directory vnode [UNUSED].
- * cr - credentials of caller.
- * ct - caller context
- *
- * OUT: vpp - vnode of located entry, NULL if not found.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * NA
- */
-/* ARGSUSED */
-static int
-zfs_lookup(vnode_t *dvp, const char *nm, vnode_t **vpp,
- struct componentname *cnp, int nameiop, cred_t *cr, kthread_t *td,
- int flags, boolean_t cached)
-{
- znode_t *zdp = VTOZ(dvp);
- znode_t *zp;
- zfsvfs_t *zfsvfs = zdp->z_zfsvfs;
- int error = 0;
-
- /*
- * Fast path lookup, however we must skip DNLC lookup
- * for case folding or normalizing lookups because the
- * DNLC code only stores the passed in name. This means
- * creating 'a' and removing 'A' on a case insensitive
- * file system would work, but DNLC still thinks 'a'
- * exists and won't let you create it again on the next
- * pass through fast path.
- */
- if (!(flags & LOOKUP_XATTR)) {
- if (dvp->v_type != VDIR) {
- return (SET_ERROR(ENOTDIR));
- } else if (zdp->z_sa_hdl == NULL) {
- return (SET_ERROR(EIO));
- }
- }
-
- DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp,
- const char *, nm);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zdp);
-
- *vpp = NULL;
-
- if (flags & LOOKUP_XATTR) {
- /*
- * If the xattr property is off, refuse the lookup request.
- */
- if (!(zfsvfs->z_flags & ZSB_XATTR)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- /*
- * We don't allow recursive attributes..
- * Maybe someday we will.
- */
- if (zdp->z_pflags & ZFS_XATTR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if ((error = zfs_get_xattrdir(VTOZ(dvp), &zp, cr, flags))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- *vpp = ZTOV(zp);
-
- /*
- * Do we have permission to get into attribute directory?
- */
- error = zfs_zaccess(zp, ACE_EXECUTE, 0, B_FALSE, cr);
- if (error) {
- vrele(ZTOV(zp));
- }
-
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Check accessibility of directory if we're not coming in via
- * VOP_CACHEDLOOKUP.
- */
- if (!cached) {
-#ifdef NOEXECCHECK
- if ((cnp->cn_flags & NOEXECCHECK) != 0) {
- cnp->cn_flags &= ~NOEXECCHECK;
- } else
-#endif
- if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
-
- /*
- * First handle the special cases.
- */
- if ((cnp->cn_flags & ISDOTDOT) != 0) {
- /*
- * If we are a snapshot mounted under .zfs, return
- * the vp for the snapshot directory.
- */
- if (zdp->z_id == zfsvfs->z_root && zfsvfs->z_parent != zfsvfs) {
- struct componentname cn;
- vnode_t *zfsctl_vp;
- int ltype;
-
- ZFS_EXIT(zfsvfs);
- ltype = VOP_ISLOCKED(dvp);
- VOP_UNLOCK1(dvp);
- error = zfsctl_root(zfsvfs->z_parent, LK_SHARED,
- &zfsctl_vp);
- if (error == 0) {
- cn.cn_nameptr = "snapshot";
- cn.cn_namelen = strlen(cn.cn_nameptr);
- cn.cn_nameiop = cnp->cn_nameiop;
- cn.cn_flags = cnp->cn_flags & ~ISDOTDOT;
- cn.cn_lkflags = cnp->cn_lkflags;
- error = VOP_LOOKUP(zfsctl_vp, vpp, &cn);
- vput(zfsctl_vp);
- }
- vn_lock(dvp, ltype | LK_RETRY);
- return (error);
- }
- }
- if (zfs_has_ctldir(zdp) && strcmp(nm, ZFS_CTLDIR_NAME) == 0) {
- ZFS_EXIT(zfsvfs);
- if ((cnp->cn_flags & ISLASTCN) != 0 && nameiop != LOOKUP)
- return (SET_ERROR(ENOTSUP));
- error = zfsctl_root(zfsvfs, cnp->cn_lkflags, vpp);
- return (error);
- }
-
- /*
- * The loop is retry the lookup if the parent-child relationship
- * changes during the dot-dot locking complexities.
- */
- for (;;) {
- uint64_t parent;
-
- error = zfs_dirlook(zdp, nm, &zp);
- if (error == 0)
- *vpp = ZTOV(zp);
-
- ZFS_EXIT(zfsvfs);
- if (error != 0)
- break;
-
- error = zfs_lookup_lock(dvp, *vpp, nm, cnp->cn_lkflags);
- if (error != 0) {
- /*
- * If we've got a locking error, then the vnode
- * got reclaimed because of a force unmount.
- * We never enter doomed vnodes into the name cache.
- */
- *vpp = NULL;
- return (error);
- }
-
- if ((cnp->cn_flags & ISDOTDOT) == 0)
- break;
-
- ZFS_ENTER(zfsvfs);
- if (zdp->z_sa_hdl == NULL) {
- error = SET_ERROR(EIO);
- } else {
- error = sa_lookup(zdp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
- &parent, sizeof (parent));
- }
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- vput(ZTOV(zp));
- break;
- }
- if (zp->z_id == parent) {
- ZFS_EXIT(zfsvfs);
- break;
- }
- vput(ZTOV(zp));
- }
-
- if (error != 0)
- *vpp = NULL;
-
- /* Translate errors and add SAVENAME when needed. */
- if (cnp->cn_flags & ISLASTCN) {
- switch (nameiop) {
- case CREATE:
- case RENAME:
- if (error == ENOENT) {
- error = EJUSTRETURN;
- cnp->cn_flags |= SAVENAME;
- break;
- }
- /* FALLTHROUGH */
- case DELETE:
- if (error == 0)
- cnp->cn_flags |= SAVENAME;
- break;
- }
- }
-
- /* Insert name into cache (as non-existent) if appropriate. */
- if (zfsvfs->z_use_namecache && !zfsvfs->z_replay &&
- error == ENOENT && (cnp->cn_flags & MAKEENTRY) != 0)
- cache_enter(dvp, NULL, cnp);
-
- /* Insert name into cache if appropriate. */
- if (zfsvfs->z_use_namecache && !zfsvfs->z_replay &&
- error == 0 && (cnp->cn_flags & MAKEENTRY)) {
- if (!(cnp->cn_flags & ISLASTCN) ||
- (nameiop != DELETE && nameiop != RENAME)) {
- cache_enter(dvp, *vpp, cnp);
- }
- }
-
- return (error);
-}
-
-/*
- * Attempt to create a new entry in a directory. If the entry
- * already exists, truncate the file if permissible, else return
- * an error. Return the vp of the created or trunc'd file.
- *
- * IN: dvp - vnode of directory to put new file entry in.
- * name - name of new file entry.
- * vap - attributes of new file.
- * excl - flag indicating exclusive or non-exclusive mode.
- * mode - mode to open file with.
- * cr - credentials of caller.
- * flag - large file flag [UNUSED].
- * ct - caller context
- * vsecp - ACL to be set
- *
- * OUT: vpp - vnode of created or trunc'd entry.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dvp - ctime|mtime updated if new entry created
- * vp - ctime|mtime always, atime if new
- */
-
-/* ARGSUSED */
-int
-zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl, int mode,
- znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- zilog_t *zilog;
- objset_t *os;
- dmu_tx_t *tx;
- int error;
- ksid_t *ksid;
- uid_t uid;
- gid_t gid = crgetgid(cr);
- uint64_t projid = ZFS_DEFAULT_PROJID;
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
- uint64_t txtype;
-#ifdef DEBUG_VFS_LOCKS
- vnode_t *dvp = ZTOV(dzp);
-#endif
-
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
-
- ksid = crgetsid(cr, KSID_OWNER);
- if (ksid)
- uid = ksid_getid(ksid);
- else
- uid = crgetuid(cr);
-
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || (vap->va_mask & AT_XVATTR) ||
- IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- os = zfsvfs->z_os;
- zilog = zfsvfs->z_log;
-
- if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- if (vap->va_mask & AT_XVATTR) {
- if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap,
- crgetuid(cr), cr, vap->va_type)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- *zpp = NULL;
-
- if ((vap->va_mode & S_ISVTX) && secpolicy_vnode_stky_modify(cr))
- vap->va_mode &= ~S_ISVTX;
-
- error = zfs_dirent_lookup(dzp, name, &zp, ZNEW);
- if (error) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- ASSERT3P(zp, ==, NULL);
-
- /*
- * Create a new file object and update the directory
- * to reference it.
- */
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- goto out;
- }
-
- /*
- * We only support the creation of regular files in
- * extended attribute directories.
- */
-
- if ((dzp->z_pflags & ZFS_XATTR) &&
- (vap->va_type != VREG)) {
- error = SET_ERROR(EINVAL);
- goto out;
- }
-
- if ((error = zfs_acl_ids_create(dzp, 0, vap,
- cr, vsecp, &acl_ids)) != 0)
- goto out;
-
- if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
- projid = zfs_inherit_projid(dzp);
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
- zfs_acl_ids_free(&acl_ids);
- error = SET_ERROR(EDQUOT);
- goto out;
- }
-
- getnewvnode_reserve_();
-
- tx = dmu_tx_create(os);
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
-
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
- dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
- if (!zfsvfs->z_use_sa &&
- acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, acl_ids.z_aclp->z_acl_bytes);
- }
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- getnewvnode_drop_reserve();
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- (void) zfs_link_create(dzp, name, zp, tx, ZNEW);
- txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
- zfs_log_create(zilog, tx, txtype, dzp, zp, name,
- vsecp, acl_ids.z_fuidp, vap);
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
-
- getnewvnode_drop_reserve();
-
-out:
- VNCHECKREF(dvp);
- if (error == 0) {
- *zpp = zp;
- }
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Remove an entry from a directory.
- *
- * IN: dvp - vnode of directory to remove entry from.
- * name - name of entry to remove.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dvp - ctime|mtime
- * vp - ctime (if nlink > 0)
- */
-
-/*ARGSUSED*/
-static int
-zfs_remove_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr)
-{
- znode_t *dzp = VTOZ(dvp);
- znode_t *zp;
- znode_t *xzp;
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- zilog_t *zilog;
- uint64_t xattr_obj;
- uint64_t obj = 0;
- dmu_tx_t *tx;
- boolean_t unlinked;
- uint64_t txtype;
- int error;
-
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zp = VTOZ(vp);
- ZFS_VERIFY_ZP(zp);
- zilog = zfsvfs->z_log;
-
- xattr_obj = 0;
- xzp = NULL;
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- /*
- * Need to use rmdir for removing directories.
- */
- if (vp->v_type == VDIR) {
- error = SET_ERROR(EPERM);
- goto out;
- }
-
- vnevent_remove(vp, dvp, name, ct);
-
- obj = zp->z_id;
-
- /* are there any extended attributes? */
- error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
- &xattr_obj, sizeof (xattr_obj));
- if (error == 0 && xattr_obj) {
- error = zfs_zget(zfsvfs, xattr_obj, &xzp);
- ASSERT0(error);
- }
-
- /*
- * We may delete the znode now, or we may put it in the unlinked set;
- * it depends on whether we're the last link, and on whether there are
- * other holds on the vnode. So we dmu_tx_hold() the right things to
- * allow for either case.
- */
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
- zfs_sa_upgrade_txholds(tx, dzp);
-
- if (xzp) {
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
- }
-
- /* charge as an update -- would be nice not to charge at all */
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
-
- /*
- * Mark this transaction as typically resulting in a net free of space
- */
- dmu_tx_mark_netfree(tx);
-
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Remove the directory entry.
- */
- error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, &unlinked);
-
- if (error) {
- dmu_tx_commit(tx);
- goto out;
- }
-
- if (unlinked) {
- zfs_unlinked_add(zp, tx);
- vp->v_vflag |= VV_NOSYNC;
- }
- /* XXX check changes to linux vnops */
- txtype = TX_REMOVE;
- zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked);
-
- dmu_tx_commit(tx);
-out:
-
- if (xzp)
- vrele(ZTOV(xzp));
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-
-static int
-zfs_lookup_internal(znode_t *dzp, const char *name, vnode_t **vpp,
- struct componentname *cnp, int nameiop)
-{
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- int error;
-
- cnp->cn_nameptr = __DECONST(char *, name);
- cnp->cn_namelen = strlen(name);
- cnp->cn_nameiop = nameiop;
- cnp->cn_flags = ISLASTCN | SAVENAME;
- cnp->cn_lkflags = LK_EXCLUSIVE | LK_RETRY;
- cnp->cn_cred = kcred;
- cnp->cn_thread = curthread;
-
- if (zfsvfs->z_use_namecache && !zfsvfs->z_replay) {
- struct vop_lookup_args a;
-
- a.a_gen.a_desc = &vop_lookup_desc;
- a.a_dvp = ZTOV(dzp);
- a.a_vpp = vpp;
- a.a_cnp = cnp;
- error = vfs_cache_lookup(&a);
- } else {
- error = zfs_lookup(ZTOV(dzp), name, vpp, cnp, nameiop, kcred,
- curthread, 0, B_FALSE);
- }
-#ifdef ZFS_DEBUG
- if (error) {
- printf("got error %d on name %s on op %d\n", error, name,
- nameiop);
- kdb_backtrace();
- }
-#endif
- return (error);
-}
-
-int
-zfs_remove(znode_t *dzp, const char *name, cred_t *cr, int flags)
-{
- vnode_t *vp;
- int error;
- struct componentname cn;
-
- if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE)))
- return (error);
-
- error = zfs_remove_(ZTOV(dzp), vp, name, cr);
- vput(vp);
- return (error);
-}
-/*
- * Create a new directory and insert it into dvp using the name
- * provided. Return a pointer to the inserted directory.
- *
- * IN: dvp - vnode of directory to add subdir to.
- * dirname - name of new directory.
- * vap - attributes of new directory.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- * vsecp - ACL to be set
- *
- * OUT: vpp - vnode of created directory.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dvp - ctime|mtime updated
- * vp - ctime|mtime|atime updated
- */
-/*ARGSUSED*/
-int
-zfs_mkdir(znode_t *dzp, const char *dirname, vattr_t *vap, znode_t **zpp,
- cred_t *cr, int flags, vsecattr_t *vsecp)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- zilog_t *zilog;
- uint64_t txtype;
- dmu_tx_t *tx;
- int error;
- ksid_t *ksid;
- uid_t uid;
- gid_t gid = crgetgid(cr);
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
-
- ASSERT(vap->va_type == VDIR);
-
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
-
- ksid = crgetsid(cr, KSID_OWNER);
- if (ksid)
- uid = ksid_getid(ksid);
- else
- uid = crgetuid(cr);
- if (zfsvfs->z_use_fuids == B_FALSE &&
- ((vap->va_mask & AT_XVATTR) ||
- IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (dzp->z_pflags & ZFS_XATTR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (zfsvfs->z_utf8 && u8_validate(dirname,
- strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- if (vap->va_mask & AT_XVATTR) {
- if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap,
- crgetuid(cr), cr, vap->va_type)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- if ((error = zfs_acl_ids_create(dzp, 0, vap, cr,
- NULL, &acl_ids)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * First make sure the new directory doesn't exist.
- *
- * Existence is checked first to make sure we don't return
- * EACCES instead of EEXIST which can cause some applications
- * to fail.
- */
- *zpp = NULL;
-
- if ((error = zfs_dirent_lookup(dzp, dirname, &zp, ZNEW))) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- ASSERT3P(zp, ==, NULL);
-
- if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr))) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EDQUOT));
- }
-
- /*
- * Add a new entry to the directory.
- */
- getnewvnode_reserve_();
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
- dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
- acl_ids.z_aclp->z_acl_bytes);
- }
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
-
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- getnewvnode_drop_reserve();
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Create new node.
- */
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- /*
- * Now put new name in parent dir.
- */
- (void) zfs_link_create(dzp, dirname, zp, tx, ZNEW);
-
- *zpp = zp;
-
- txtype = zfs_log_create_txtype(Z_DIR, NULL, vap);
- zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, NULL,
- acl_ids.z_fuidp, vap);
-
- zfs_acl_ids_free(&acl_ids);
-
- dmu_tx_commit(tx);
-
- getnewvnode_drop_reserve();
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*
- * Remove a directory subdir entry. If the current working
- * directory is the same as the subdir to be removed, the
- * remove will fail.
- *
- * IN: dvp - vnode of directory to remove from.
- * name - name of directory to be removed.
- * cwd - vnode of current working directory.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dvp - ctime|mtime updated
- */
-/*ARGSUSED*/
-static int
-zfs_rmdir_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr)
-{
- znode_t *dzp = VTOZ(dvp);
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- zilog_t *zilog;
- dmu_tx_t *tx;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- ZFS_VERIFY_ZP(zp);
- zilog = zfsvfs->z_log;
-
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- if (vp->v_type != VDIR) {
- error = SET_ERROR(ENOTDIR);
- goto out;
- }
-
- vnevent_rmdir(vp, dvp, name, ct);
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
- zfs_sa_upgrade_txholds(tx, zp);
- zfs_sa_upgrade_txholds(tx, dzp);
- dmu_tx_mark_netfree(tx);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- cache_purge(dvp);
-
- error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, NULL);
-
- if (error == 0) {
- uint64_t txtype = TX_RMDIR;
- zfs_log_remove(zilog, tx, txtype, dzp, name,
- ZFS_NO_OBJECT, B_FALSE);
- }
-
- dmu_tx_commit(tx);
-
- cache_purge(vp);
-out:
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-int
-zfs_rmdir(znode_t *dzp, const char *name, znode_t *cwd, cred_t *cr, int flags)
-{
- struct componentname cn;
- vnode_t *vp;
- int error;
-
- if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE)))
- return (error);
-
- error = zfs_rmdir_(ZTOV(dzp), vp, name, cr);
- vput(vp);
- return (error);
-}
-
-/*
- * Read as many directory entries as will fit into the provided
- * buffer from the given directory cursor position (specified in
- * the uio structure).
- *
- * IN: vp - vnode of directory to read.
- * uio - structure supplying read location, range info,
- * and return buffer.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- *
- * OUT: uio - updated offset and range, buffer filled.
- * eofp - set to true if end-of-file detected.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * vp - atime updated
- *
- * Note that the low 4 bits of the cookie returned by zap is always zero.
- * This allows us to use the low range for "special" directory entries:
- * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
- * we use the offset 2 for the '.zfs' directory.
- */
-/* ARGSUSED */
-static int
-zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
- int *ncookies, ulong_t **cookies)
-{
- znode_t *zp = VTOZ(vp);
- iovec_t *iovp;
- edirent_t *eodp;
- dirent64_t *odp;
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- objset_t *os;
- caddr_t outbuf;
- size_t bufsize;
- zap_cursor_t zc;
- zap_attribute_t zap;
- uint_t bytes_wanted;
- uint64_t offset; /* must be unsigned; checks for < 1 */
- uint64_t parent;
- int local_eof;
- int outcount;
- int error;
- uint8_t prefetch;
- boolean_t check_sysattrs;
- uint8_t type;
- int ncooks;
- ulong_t *cooks = NULL;
- int flags = 0;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
- &parent, sizeof (parent))) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * If we are not given an eof variable,
- * use a local one.
- */
- if (eofp == NULL)
- eofp = &local_eof;
-
- /*
- * Check for valid iov_len.
- */
- if (uio->uio_iov->iov_len <= 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Quit if directory has been removed (posix)
- */
- if ((*eofp = zp->z_unlinked) != 0) {
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- error = 0;
- os = zfsvfs->z_os;
- offset = uio->uio_loffset;
- prefetch = zp->z_zn_prefetch;
-
- /*
- * Initialize the iterator cursor.
- */
- if (offset <= 3) {
- /*
- * Start iteration from the beginning of the directory.
- */
- zap_cursor_init(&zc, os, zp->z_id);
- } else {
- /*
- * The offset is a serialized cursor.
- */
- zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
- }
-
- /*
- * Get space to change directory entries into fs independent format.
- */
- iovp = uio->uio_iov;
- bytes_wanted = iovp->iov_len;
- if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) {
- bufsize = bytes_wanted;
- outbuf = kmem_alloc(bufsize, KM_SLEEP);
- odp = (struct dirent64 *)outbuf;
- } else {
- bufsize = bytes_wanted;
- outbuf = NULL;
- odp = (struct dirent64 *)iovp->iov_base;
- }
- eodp = (struct edirent *)odp;
-
- if (ncookies != NULL) {
- /*
- * Minimum entry size is dirent size and 1 byte for a file name.
- */
- ncooks = uio->uio_resid / (sizeof (struct dirent) -
- sizeof (((struct dirent *)NULL)->d_name) + 1);
- cooks = malloc(ncooks * sizeof (ulong_t), M_TEMP, M_WAITOK);
- *cookies = cooks;
- *ncookies = ncooks;
- }
- /*
- * If this VFS supports the system attribute view interface; and
- * we're looking at an extended attribute directory; and we care
- * about normalization conflicts on this vfs; then we must check
- * for normalization conflicts with the sysattr name space.
- */
-#ifdef TODO
- check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
- (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm &&
- (flags & V_RDDIR_ENTFLAGS);
-#else
- check_sysattrs = 0;
-#endif
-
- /*
- * Transform to file-system independent format
- */
- outcount = 0;
- while (outcount < bytes_wanted) {
- ino64_t objnum;
- ushort_t reclen;
- off64_t *next = NULL;
-
- /*
- * Special case `.', `..', and `.zfs'.
- */
- if (offset == 0) {
- (void) strcpy(zap.za_name, ".");
- zap.za_normalization_conflict = 0;
- objnum = zp->z_id;
- type = DT_DIR;
- } else if (offset == 1) {
- (void) strcpy(zap.za_name, "..");
- zap.za_normalization_conflict = 0;
- objnum = parent;
- type = DT_DIR;
- } else if (offset == 2 && zfs_show_ctldir(zp)) {
- (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
- zap.za_normalization_conflict = 0;
- objnum = ZFSCTL_INO_ROOT;
- type = DT_DIR;
- } else {
- /*
- * Grab next entry.
- */
- if ((error = zap_cursor_retrieve(&zc, &zap))) {
- if ((*eofp = (error == ENOENT)) != 0)
- break;
- else
- goto update;
- }
-
- if (zap.za_integer_length != 8 ||
- zap.za_num_integers != 1) {
- cmn_err(CE_WARN, "zap_readdir: bad directory "
- "entry, obj = %lld, offset = %lld\n",
- (u_longlong_t)zp->z_id,
- (u_longlong_t)offset);
- error = SET_ERROR(ENXIO);
- goto update;
- }
-
- objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
- /*
- * MacOS X can extract the object type here such as:
- * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer);
- */
- type = ZFS_DIRENT_TYPE(zap.za_first_integer);
-
- if (check_sysattrs && !zap.za_normalization_conflict) {
-#ifdef TODO
- zap.za_normalization_conflict =
- xattr_sysattr_casechk(zap.za_name);
-#else
- panic("%s:%u: TODO", __func__, __LINE__);
-#endif
- }
- }
-
- if (flags & V_RDDIR_ACCFILTER) {
- /*
- * If we have no access at all, don't include
- * this entry in the returned information
- */
- znode_t *ezp;
- if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0)
- goto skip_entry;
- if (!zfs_has_access(ezp, cr)) {
- vrele(ZTOV(ezp));
- goto skip_entry;
- }
- vrele(ZTOV(ezp));
- }
-
- if (flags & V_RDDIR_ENTFLAGS)
- reclen = EDIRENT_RECLEN(strlen(zap.za_name));
- else
- reclen = DIRENT64_RECLEN(strlen(zap.za_name));
-
- /*
- * Will this entry fit in the buffer?
- */
- if (outcount + reclen > bufsize) {
- /*
- * Did we manage to fit anything in the buffer?
- */
- if (!outcount) {
- error = SET_ERROR(EINVAL);
- goto update;
- }
- break;
- }
- if (flags & V_RDDIR_ENTFLAGS) {
- /*
- * Add extended flag entry:
- */
- eodp->ed_ino = objnum;
- eodp->ed_reclen = reclen;
- /* NOTE: ed_off is the offset for the *next* entry */
- next = &(eodp->ed_off);
- eodp->ed_eflags = zap.za_normalization_conflict ?
- ED_CASE_CONFLICT : 0;
- (void) strncpy(eodp->ed_name, zap.za_name,
- EDIRENT_NAMELEN(reclen));
- eodp = (edirent_t *)((intptr_t)eodp + reclen);
- } else {
- /*
- * Add normal entry:
- */
- odp->d_ino = objnum;
- odp->d_reclen = reclen;
- odp->d_namlen = strlen(zap.za_name);
- /* NOTE: d_off is the offset for the *next* entry. */
- next = &odp->d_off;
- strlcpy(odp->d_name, zap.za_name, odp->d_namlen + 1);
- odp->d_type = type;
- dirent_terminate(odp);
- odp = (dirent64_t *)((intptr_t)odp + reclen);
- }
- outcount += reclen;
-
- ASSERT(outcount <= bufsize);
-
- /* Prefetch znode */
- if (prefetch)
- dmu_prefetch(os, objnum, 0, 0, 0,
- ZIO_PRIORITY_SYNC_READ);
-
- skip_entry:
- /*
- * Move to the next entry, fill in the previous offset.
- */
- if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
- zap_cursor_advance(&zc);
- offset = zap_cursor_serialize(&zc);
- } else {
- offset += 1;
- }
-
- /* Fill the offset right after advancing the cursor. */
- if (next != NULL)
- *next = offset;
- if (cooks != NULL) {
- *cooks++ = offset;
- ncooks--;
- KASSERT(ncooks >= 0, ("ncookies=%d", ncooks));
- }
- }
- zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
-
- /* Subtract unused cookies */
- if (ncookies != NULL)
- *ncookies -= ncooks;
-
- if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) {
- iovp->iov_base += outcount;
- iovp->iov_len -= outcount;
- uio->uio_resid -= outcount;
- } else if ((error = uiomove(outbuf, (long)outcount, UIO_READ, uio))) {
- /*
- * Reset the pointer.
- */
- offset = uio->uio_loffset;
- }
-
-update:
- zap_cursor_fini(&zc);
- if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
- kmem_free(outbuf, bufsize);
-
- if (error == ENOENT)
- error = 0;
-
- ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
-
- uio->uio_loffset = offset;
- ZFS_EXIT(zfsvfs);
- if (error != 0 && cookies != NULL) {
- free(*cookies, M_TEMP);
- *cookies = NULL;
- *ncookies = 0;
- }
- return (error);
-}
-
-ulong_t zfs_fsync_sync_cnt = 4;
-
-static int
-zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
-
- (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt);
-
- if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- zil_commit(zfsvfs->z_log, zp->z_id);
- ZFS_EXIT(zfsvfs);
- }
- tsd_set(zfs_fsyncer_key, NULL);
- return (0);
-}
-
-
-/*
- * Get the requested file attributes and place them in the provided
- * vattr structure.
- *
- * IN: vp - vnode of file.
- * vap - va_mask identifies requested attributes.
- * If AT_XVATTR set, then optional attrs are requested
- * flags - ATTR_NOACLCHECK (CIFS server context)
- * cr - credentials of caller.
- *
- * OUT: vap - attribute values.
- *
- * RETURN: 0 (always succeeds).
- */
-/* ARGSUSED */
-static int
-zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error = 0;
- uint32_t blksize;
- u_longlong_t nblocks;
- uint64_t mtime[2], ctime[2], crtime[2], rdev;
- xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
- xoptattr_t *xoap = NULL;
- boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- sa_bulk_attr_t bulk[4];
- int count = 0;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid);
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
- if (vp->v_type == VBLK || vp->v_type == VCHR)
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
- &rdev, 8);
-
- if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
- * Also, if we are the owner don't bother, since owner should
- * always be allowed to read basic attributes of file.
- */
- if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) &&
- (vap->va_uid != crgetuid(cr))) {
- if ((error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0,
- skipaclchk, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- /*
- * Return all attributes. It's cheaper to provide the answer
- * than to determine whether we were asked the question.
- */
-
- vap->va_type = IFTOVT(zp->z_mode);
- vap->va_mode = zp->z_mode & ~S_IFMT;
- vn_fsid(vp, vap);
- vap->va_nodeid = zp->z_id;
- vap->va_nlink = zp->z_links;
- if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp) &&
- zp->z_links < ZFS_LINK_MAX)
- vap->va_nlink++;
- vap->va_size = zp->z_size;
- if (vp->v_type == VBLK || vp->v_type == VCHR)
- vap->va_rdev = zfs_cmpldev(rdev);
- vap->va_seq = zp->z_seq;
- vap->va_flags = 0; /* FreeBSD: Reset chflags(2) flags. */
- vap->va_filerev = zp->z_seq;
-
- /*
- * Add in any requested optional attributes and the create time.
- * Also set the corresponding bits in the returned attribute bitmap.
- */
- if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) {
- if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
- xoap->xoa_archive =
- ((zp->z_pflags & ZFS_ARCHIVE) != 0);
- XVA_SET_RTN(xvap, XAT_ARCHIVE);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
- xoap->xoa_readonly =
- ((zp->z_pflags & ZFS_READONLY) != 0);
- XVA_SET_RTN(xvap, XAT_READONLY);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
- xoap->xoa_system =
- ((zp->z_pflags & ZFS_SYSTEM) != 0);
- XVA_SET_RTN(xvap, XAT_SYSTEM);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
- xoap->xoa_hidden =
- ((zp->z_pflags & ZFS_HIDDEN) != 0);
- XVA_SET_RTN(xvap, XAT_HIDDEN);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
- xoap->xoa_nounlink =
- ((zp->z_pflags & ZFS_NOUNLINK) != 0);
- XVA_SET_RTN(xvap, XAT_NOUNLINK);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
- xoap->xoa_immutable =
- ((zp->z_pflags & ZFS_IMMUTABLE) != 0);
- XVA_SET_RTN(xvap, XAT_IMMUTABLE);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
- xoap->xoa_appendonly =
- ((zp->z_pflags & ZFS_APPENDONLY) != 0);
- XVA_SET_RTN(xvap, XAT_APPENDONLY);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
- xoap->xoa_nodump =
- ((zp->z_pflags & ZFS_NODUMP) != 0);
- XVA_SET_RTN(xvap, XAT_NODUMP);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
- xoap->xoa_opaque =
- ((zp->z_pflags & ZFS_OPAQUE) != 0);
- XVA_SET_RTN(xvap, XAT_OPAQUE);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
- xoap->xoa_av_quarantined =
- ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0);
- XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
- xoap->xoa_av_modified =
- ((zp->z_pflags & ZFS_AV_MODIFIED) != 0);
- XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) &&
- vp->v_type == VREG) {
- zfs_sa_get_scanstamp(zp, xvap);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
- xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0);
- XVA_SET_RTN(xvap, XAT_REPARSE);
- }
- if (XVA_ISSET_REQ(xvap, XAT_GEN)) {
- xoap->xoa_generation = zp->z_gen;
- XVA_SET_RTN(xvap, XAT_GEN);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
- xoap->xoa_offline =
- ((zp->z_pflags & ZFS_OFFLINE) != 0);
- XVA_SET_RTN(xvap, XAT_OFFLINE);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
- xoap->xoa_sparse =
- ((zp->z_pflags & ZFS_SPARSE) != 0);
- XVA_SET_RTN(xvap, XAT_SPARSE);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
- xoap->xoa_projinherit =
- ((zp->z_pflags & ZFS_PROJINHERIT) != 0);
- XVA_SET_RTN(xvap, XAT_PROJINHERIT);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
- xoap->xoa_projid = zp->z_projid;
- XVA_SET_RTN(xvap, XAT_PROJID);
- }
- }
-
- ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime);
- ZFS_TIME_DECODE(&vap->va_mtime, mtime);
- ZFS_TIME_DECODE(&vap->va_ctime, ctime);
- ZFS_TIME_DECODE(&vap->va_birthtime, crtime);
-
-
- sa_object_size(zp->z_sa_hdl, &blksize, &nblocks);
- vap->va_blksize = blksize;
- vap->va_bytes = nblocks << 9; /* nblocks * 512 */
-
- if (zp->z_blksz == 0) {
- /*
- * Block size hasn't been set; suggest maximal I/O transfers.
- */
- vap->va_blksize = zfsvfs->z_max_blksz;
- }
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*
- * Set the file attributes to the values contained in the
- * vattr structure.
- *
- * IN: zp - znode of file to be modified.
- * vap - new attribute values.
- * If AT_XVATTR set, then optional attrs are being set
- * flags - ATTR_UTIME set if non-default time values provided.
- * - ATTR_NOACLCHECK (CIFS context only).
- * cr - credentials of caller.
- * ct - caller context
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * vp - ctime updated, mtime updated if size changed.
- */
-/* ARGSUSED */
-int
-zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr)
-{
- vnode_t *vp = ZTOV(zp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- objset_t *os = zfsvfs->z_os;
- zilog_t *zilog;
- dmu_tx_t *tx;
- vattr_t oldva;
- xvattr_t tmpxvattr;
- uint_t mask = vap->va_mask;
- uint_t saved_mask = 0;
- uint64_t saved_mode;
- int trim_mask = 0;
- uint64_t new_mode;
- uint64_t new_uid, new_gid;
- uint64_t xattr_obj;
- uint64_t mtime[2], ctime[2];
- uint64_t projid = ZFS_INVALID_PROJID;
- znode_t *attrzp;
- int need_policy = FALSE;
- int err, err2;
- zfs_fuid_info_t *fuidp = NULL;
- xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
- xoptattr_t *xoap;
- zfs_acl_t *aclp;
- boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- boolean_t fuid_dirtied = B_FALSE;
- sa_bulk_attr_t bulk[7], xattr_bulk[7];
- int count = 0, xattr_count = 0;
-
- if (mask == 0)
- return (0);
-
- if (mask & AT_NOSET)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- zilog = zfsvfs->z_log;
-
- /*
- * Make sure that if we have ephemeral uid/gid or xvattr specified
- * that file system is at proper version level
- */
-
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) ||
- ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) ||
- (mask & AT_XVATTR))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (mask & AT_SIZE && vp->v_type == VDIR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EISDIR));
- }
-
- if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * If this is an xvattr_t, then get a pointer to the structure of
- * optional attributes. If this is NULL, then we have a vattr_t.
- */
- xoap = xva_getxoptattr(xvap);
-
- xva_init(&tmpxvattr);
-
- /*
- * Immutable files can only alter immutable bit and atime
- */
- if ((zp->z_pflags & ZFS_IMMUTABLE) &&
- ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) ||
- ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- /*
- * Note: ZFS_READONLY is handled in zfs_zaccess_common.
- */
-
- /*
- * Verify timestamps doesn't overflow 32 bits.
- * ZFS can handle large timestamps, but 32bit syscalls can't
- * handle times greater than 2039. This check should be removed
- * once large timestamps are fully supported.
- */
- if (mask & (AT_ATIME | AT_MTIME)) {
- if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) ||
- ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EOVERFLOW));
- }
- }
- if (xoap != NULL && (mask & AT_XVATTR)) {
- if (XVA_ISSET_REQ(xvap, XAT_CREATETIME) &&
- TIMESPEC_OVERFLOW(&vap->va_birthtime)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EOVERFLOW));
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
- if (!dmu_objset_projectquota_enabled(os) ||
- (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- projid = xoap->xoa_projid;
- if (unlikely(projid == ZFS_INVALID_PROJID)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID)
- projid = ZFS_INVALID_PROJID;
- else
- need_policy = TRUE;
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) &&
- (xoap->xoa_projinherit !=
- ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) &&
- (!dmu_objset_projectquota_enabled(os) ||
- (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode)))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EOPNOTSUPP));
- }
- }
-
- attrzp = NULL;
- aclp = NULL;
-
- if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EROFS));
- }
-
- /*
- * First validate permissions
- */
-
- if (mask & AT_SIZE) {
- /*
- * XXX - Note, we are not providing any open
- * mode flags here (like FNDELAY), so we may
- * block if there are locks present... this
- * should be addressed in openat().
- */
- /* XXX - would it be OK to generate a log record here? */
- err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
- if (err) {
- ZFS_EXIT(zfsvfs);
- return (err);
- }
- }
-
- if (mask & (AT_ATIME|AT_MTIME) ||
- ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
- XVA_ISSET_REQ(xvap, XAT_READONLY) ||
- XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
- XVA_ISSET_REQ(xvap, XAT_OFFLINE) ||
- XVA_ISSET_REQ(xvap, XAT_SPARSE) ||
- XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
- XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) {
- need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
- skipaclchk, cr);
- }
-
- if (mask & (AT_UID|AT_GID)) {
- int idmask = (mask & (AT_UID|AT_GID));
- int take_owner;
- int take_group;
-
- /*
- * NOTE: even if a new mode is being set,
- * we may clear S_ISUID/S_ISGID bits.
- */
-
- if (!(mask & AT_MODE))
- vap->va_mode = zp->z_mode;
-
- /*
- * Take ownership or chgrp to group we are a member of
- */
-
- take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr));
- take_group = (mask & AT_GID) &&
- zfs_groupmember(zfsvfs, vap->va_gid, cr);
-
- /*
- * If both AT_UID and AT_GID are set then take_owner and
- * take_group must both be set in order to allow taking
- * ownership.
- *
- * Otherwise, send the check through secpolicy_vnode_setattr()
- *
- */
-
- if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) ||
- ((idmask == AT_UID) && take_owner) ||
- ((idmask == AT_GID) && take_group)) {
- if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
- skipaclchk, cr) == 0) {
- /*
- * Remove setuid/setgid for non-privileged users
- */
- secpolicy_setid_clear(vap, vp, cr);
- trim_mask = (mask & (AT_UID|AT_GID));
- } else {
- need_policy = TRUE;
- }
- } else {
- need_policy = TRUE;
- }
- }
-
- oldva.va_mode = zp->z_mode;
- zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
- if (mask & AT_XVATTR) {
- /*
- * Update xvattr mask to include only those attributes
- * that are actually changing.
- *
- * the bits will be restored prior to actually setting
- * the attributes so the caller thinks they were set.
- */
- if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
- if (xoap->xoa_appendonly !=
- ((zp->z_pflags & ZFS_APPENDONLY) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_APPENDONLY);
- XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
- if (xoap->xoa_projinherit !=
- ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_PROJINHERIT);
- XVA_SET_REQ(&tmpxvattr, XAT_PROJINHERIT);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
- if (xoap->xoa_nounlink !=
- ((zp->z_pflags & ZFS_NOUNLINK) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_NOUNLINK);
- XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
- if (xoap->xoa_immutable !=
- ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
- XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
- if (xoap->xoa_nodump !=
- ((zp->z_pflags & ZFS_NODUMP) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_NODUMP);
- XVA_SET_REQ(&tmpxvattr, XAT_NODUMP);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
- if (xoap->xoa_av_modified !=
- ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
- XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
- if ((vp->v_type != VREG &&
- xoap->xoa_av_quarantined) ||
- xoap->xoa_av_quarantined !=
- ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
- XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if (need_policy == FALSE &&
- (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
- XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
- need_policy = TRUE;
- }
- }
-
- if (mask & AT_MODE) {
- if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
- err = secpolicy_setid_setsticky_clear(vp, vap,
- &oldva, cr);
- if (err) {
- ZFS_EXIT(zfsvfs);
- return (err);
- }
- trim_mask |= AT_MODE;
- } else {
- need_policy = TRUE;
- }
- }
-
- if (need_policy) {
- /*
- * If trim_mask is set then take ownership
- * has been granted or write_acl is present and user
- * has the ability to modify mode. In that case remove
- * UID|GID and or MODE from mask so that
- * secpolicy_vnode_setattr() doesn't revoke it.
- */
-
- if (trim_mask) {
- saved_mask = vap->va_mask;
- vap->va_mask &= ~trim_mask;
- if (trim_mask & AT_MODE) {
- /*
- * Save the mode, as secpolicy_vnode_setattr()
- * will overwrite it with ova.va_mode.
- */
- saved_mode = vap->va_mode;
- }
- }
- err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags,
- (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
- if (err) {
- ZFS_EXIT(zfsvfs);
- return (err);
- }
-
- if (trim_mask) {
- vap->va_mask |= saved_mask;
- if (trim_mask & AT_MODE) {
- /*
- * Recover the mode after
- * secpolicy_vnode_setattr().
- */
- vap->va_mode = saved_mode;
- }
- }
- }
-
- /*
- * secpolicy_vnode_setattr, or take ownership may have
- * changed va_mask
- */
- mask = vap->va_mask;
-
- if ((mask & (AT_UID | AT_GID)) || projid != ZFS_INVALID_PROJID) {
- err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
- &xattr_obj, sizeof (xattr_obj));
-
- if (err == 0 && xattr_obj) {
- err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp);
- if (err == 0) {
- err = vn_lock(ZTOV(attrzp), LK_EXCLUSIVE);
- if (err != 0)
- vrele(ZTOV(attrzp));
- }
- if (err)
- goto out2;
- }
- if (mask & AT_UID) {
- new_uid = zfs_fuid_create(zfsvfs,
- (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
- if (new_uid != zp->z_uid &&
- zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT,
- new_uid)) {
- if (attrzp)
- vput(ZTOV(attrzp));
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
-
- if (mask & AT_GID) {
- new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid,
- cr, ZFS_GROUP, &fuidp);
- if (new_gid != zp->z_gid &&
- zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT,
- new_gid)) {
- if (attrzp)
- vput(ZTOV(attrzp));
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
-
- if (projid != ZFS_INVALID_PROJID &&
- zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) {
- if (attrzp)
- vput(ZTOV(attrzp));
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
- tx = dmu_tx_create(os);
-
- if (mask & AT_MODE) {
- uint64_t pmode = zp->z_mode;
- uint64_t acl_obj;
- new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
-
- if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED &&
- !(zp->z_pflags & ZFS_ACL_TRIVIAL)) {
- err = SET_ERROR(EPERM);
- goto out;
- }
-
- if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)))
- goto out;
-
- if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) {
- /*
- * Are we upgrading ACL from old V0 format
- * to V1 format?
- */
- if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
- zfs_znode_acl_version(zp) ==
- ZFS_ACL_VERSION_INITIAL) {
- dmu_tx_hold_free(tx, acl_obj, 0,
- DMU_OBJECT_END);
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, aclp->z_acl_bytes);
- } else {
- dmu_tx_hold_write(tx, acl_obj, 0,
- aclp->z_acl_bytes);
- }
- } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, aclp->z_acl_bytes);
- }
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- } else {
- if (((mask & AT_XVATTR) &&
- XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) ||
- (projid != ZFS_INVALID_PROJID &&
- !(zp->z_pflags & ZFS_PROJID)))
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- else
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- }
-
- if (attrzp) {
- dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE);
- }
-
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
-
- zfs_sa_upgrade_txholds(tx, zp);
-
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err)
- goto out;
-
- count = 0;
- /*
- * Set each attribute requested.
- * We group settings according to the locks they need to acquire.
- *
- * Note: you cannot set ctime directly, although it will be
- * updated as a side-effect of calling this function.
- */
-
- if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) {
- /*
- * For the existed object that is upgraded from old system,
- * its on-disk layout has no slot for the project ID attribute.
- * But quota accounting logic needs to access related slots by
- * offset directly. So we need to adjust old objects' layout
- * to make the project ID to some unified and fixed offset.
- */
- if (attrzp)
- err = sa_add_projid(attrzp->z_sa_hdl, tx, projid);
- if (err == 0)
- err = sa_add_projid(zp->z_sa_hdl, tx, projid);
-
- if (unlikely(err == EEXIST))
- err = 0;
- else if (err != 0)
- goto out;
- else
- projid = ZFS_INVALID_PROJID;
- }
-
- if (mask & (AT_UID|AT_GID|AT_MODE))
- mutex_enter(&zp->z_acl_lock);
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, sizeof (zp->z_pflags));
-
- if (attrzp) {
- if (mask & (AT_UID|AT_GID|AT_MODE))
- mutex_enter(&attrzp->z_acl_lock);
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags,
- sizeof (attrzp->z_pflags));
- if (projid != ZFS_INVALID_PROJID) {
- attrzp->z_projid = projid;
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid,
- sizeof (attrzp->z_projid));
- }
- }
-
- if (mask & (AT_UID|AT_GID)) {
-
- if (mask & AT_UID) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
- &new_uid, sizeof (new_uid));
- zp->z_uid = new_uid;
- if (attrzp) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_UID(zfsvfs), NULL, &new_uid,
- sizeof (new_uid));
- attrzp->z_uid = new_uid;
- }
- }
-
- if (mask & AT_GID) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs),
- NULL, &new_gid, sizeof (new_gid));
- zp->z_gid = new_gid;
- if (attrzp) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_GID(zfsvfs), NULL, &new_gid,
- sizeof (new_gid));
- attrzp->z_gid = new_gid;
- }
- }
- if (!(mask & AT_MODE)) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs),
- NULL, &new_mode, sizeof (new_mode));
- new_mode = zp->z_mode;
- }
- err = zfs_acl_chown_setattr(zp);
- ASSERT(err == 0);
- if (attrzp) {
- err = zfs_acl_chown_setattr(attrzp);
- ASSERT(err == 0);
- }
- }
-
- if (mask & AT_MODE) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
- &new_mode, sizeof (new_mode));
- zp->z_mode = new_mode;
- ASSERT3U((uintptr_t)aclp, !=, 0);
- err = zfs_aclset_common(zp, aclp, cr, tx);
- ASSERT0(err);
- if (zp->z_acl_cached)
- zfs_acl_free(zp->z_acl_cached);
- zp->z_acl_cached = aclp;
- aclp = NULL;
- }
-
-
- if (mask & AT_ATIME) {
- ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
- &zp->z_atime, sizeof (zp->z_atime));
- }
-
- if (mask & AT_MTIME) {
- ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
- mtime, sizeof (mtime));
- }
-
- if (projid != ZFS_INVALID_PROJID) {
- zp->z_projid = projid;
- SA_ADD_BULK_ATTR(bulk, count,
- SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid,
- sizeof (zp->z_projid));
- }
-
- /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
- if (mask & AT_SIZE && !(mask & AT_MTIME)) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
- NULL, mtime, sizeof (mtime));
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
- &ctime, sizeof (ctime));
- zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
- } else if (mask != 0) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
- &ctime, sizeof (ctime));
- zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime);
- if (attrzp) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_CTIME(zfsvfs), NULL,
- &ctime, sizeof (ctime));
- zfs_tstamp_update_setup(attrzp, STATE_CHANGED,
- mtime, ctime);
- }
- }
-
- /*
- * Do this after setting timestamps to prevent timestamp
- * update from toggling bit
- */
-
- if (xoap && (mask & AT_XVATTR)) {
-
- if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
- xoap->xoa_createtime = vap->va_birthtime;
- /*
- * restore trimmed off masks
- * so that return masks can be set for caller.
- */
-
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) {
- XVA_SET_REQ(xvap, XAT_APPENDONLY);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) {
- XVA_SET_REQ(xvap, XAT_NOUNLINK);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) {
- XVA_SET_REQ(xvap, XAT_IMMUTABLE);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) {
- XVA_SET_REQ(xvap, XAT_NODUMP);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) {
- XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) {
- XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
- }
- if (XVA_ISSET_REQ(&tmpxvattr, XAT_PROJINHERIT)) {
- XVA_SET_REQ(xvap, XAT_PROJINHERIT);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
- ASSERT(vp->v_type == VREG);
-
- zfs_xvattr_set(zp, xvap, tx);
- }
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- if (mask != 0)
- zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
-
- if (mask & (AT_UID|AT_GID|AT_MODE))
- mutex_exit(&zp->z_acl_lock);
-
- if (attrzp) {
- if (mask & (AT_UID|AT_GID|AT_MODE))
- mutex_exit(&attrzp->z_acl_lock);
- }
-out:
- if (err == 0 && attrzp) {
- err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk,
- xattr_count, tx);
- ASSERT(err2 == 0);
- }
-
- if (attrzp)
- vput(ZTOV(attrzp));
-
- if (aclp)
- zfs_acl_free(aclp);
-
- if (fuidp) {
- zfs_fuid_info_free(fuidp);
- fuidp = NULL;
- }
-
- if (err) {
- dmu_tx_abort(tx);
- } else {
- err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- dmu_tx_commit(tx);
- }
-
-out2:
- if (os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (err);
-}
-
-/*
- * We acquire all but fdvp locks using non-blocking acquisitions. If we
- * fail to acquire any lock in the path we will drop all held locks,
- * acquire the new lock in a blocking fashion, and then release it and
- * restart the rename. This acquire/release step ensures that we do not
- * spin on a lock waiting for release. On error release all vnode locks
- * and decrement references the way tmpfs_rename() would do.
- */
-static int
-zfs_rename_relock(struct vnode *sdvp, struct vnode **svpp,
- struct vnode *tdvp, struct vnode **tvpp,
- const struct componentname *scnp, const struct componentname *tcnp)
-{
- zfsvfs_t *zfsvfs;
- struct vnode *nvp, *svp, *tvp;
- znode_t *sdzp, *tdzp, *szp, *tzp;
- const char *snm = scnp->cn_nameptr;
- const char *tnm = tcnp->cn_nameptr;
- int error;
-
- VOP_UNLOCK1(tdvp);
- if (*tvpp != NULL && *tvpp != tdvp)
- VOP_UNLOCK1(*tvpp);
-
-relock:
- error = vn_lock(sdvp, LK_EXCLUSIVE);
- if (error)
- goto out;
- sdzp = VTOZ(sdvp);
-
- error = vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT);
- if (error != 0) {
- VOP_UNLOCK1(sdvp);
- if (error != EBUSY)
- goto out;
- error = vn_lock(tdvp, LK_EXCLUSIVE);
- if (error)
- goto out;
- VOP_UNLOCK1(tdvp);
- goto relock;
- }
- tdzp = VTOZ(tdvp);
-
- /*
- * Before using sdzp and tdzp we must ensure that they are live.
- * As a porting legacy from illumos we have two things to worry
- * about. One is typical for FreeBSD and it is that the vnode is
- * not reclaimed (doomed). The other is that the znode is live.
- * The current code can invalidate the znode without acquiring the
- * corresponding vnode lock if the object represented by the znode
- * and vnode is no longer valid after a rollback or receive operation.
- * z_teardown_lock hidden behind ZFS_ENTER and ZFS_EXIT is the lock
- * that protects the znodes from the invalidation.
- */
- zfsvfs = sdzp->z_zfsvfs;
- ASSERT3P(zfsvfs, ==, tdzp->z_zfsvfs);
- ZFS_ENTER(zfsvfs);
-
- /*
- * We can not use ZFS_VERIFY_ZP() here because it could directly return
- * bypassing the cleanup code in the case of an error.
- */
- if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
- ZFS_EXIT(zfsvfs);
- VOP_UNLOCK1(sdvp);
- VOP_UNLOCK1(tdvp);
- error = SET_ERROR(EIO);
- goto out;
- }
-
- /*
- * Re-resolve svp to be certain it still exists and fetch the
- * correct vnode.
- */
- error = zfs_dirent_lookup(sdzp, snm, &szp, ZEXISTS);
- if (error != 0) {
- /* Source entry invalid or not there. */
- ZFS_EXIT(zfsvfs);
- VOP_UNLOCK1(sdvp);
- VOP_UNLOCK1(tdvp);
- if ((scnp->cn_flags & ISDOTDOT) != 0 ||
- (scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.'))
- error = SET_ERROR(EINVAL);
- goto out;
- }
- svp = ZTOV(szp);
-
- /*
- * Re-resolve tvp, if it disappeared we just carry on.
- */
- error = zfs_dirent_lookup(tdzp, tnm, &tzp, 0);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- VOP_UNLOCK1(sdvp);
- VOP_UNLOCK1(tdvp);
- vrele(svp);
- if ((tcnp->cn_flags & ISDOTDOT) != 0)
- error = SET_ERROR(EINVAL);
- goto out;
- }
- if (tzp != NULL)
- tvp = ZTOV(tzp);
- else
- tvp = NULL;
-
- /*
- * At present the vnode locks must be acquired before z_teardown_lock,
- * although it would be more logical to use the opposite order.
- */
- ZFS_EXIT(zfsvfs);
-
- /*
- * Now try acquire locks on svp and tvp.
- */
- nvp = svp;
- error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT);
- if (error != 0) {
- VOP_UNLOCK1(sdvp);
- VOP_UNLOCK1(tdvp);
- if (tvp != NULL)
- vrele(tvp);
- if (error != EBUSY) {
- vrele(nvp);
- goto out;
- }
- error = vn_lock(nvp, LK_EXCLUSIVE);
- if (error != 0) {
- vrele(nvp);
- goto out;
- }
- VOP_UNLOCK1(nvp);
- /*
- * Concurrent rename race.
- * XXX ?
- */
- if (nvp == tdvp) {
- vrele(nvp);
- error = SET_ERROR(EINVAL);
- goto out;
- }
- vrele(*svpp);
- *svpp = nvp;
- goto relock;
- }
- vrele(*svpp);
- *svpp = nvp;
-
- if (*tvpp != NULL)
- vrele(*tvpp);
- *tvpp = NULL;
- if (tvp != NULL) {
- nvp = tvp;
- error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT);
- if (error != 0) {
- VOP_UNLOCK1(sdvp);
- VOP_UNLOCK1(tdvp);
- VOP_UNLOCK1(*svpp);
- if (error != EBUSY) {
- vrele(nvp);
- goto out;
- }
- error = vn_lock(nvp, LK_EXCLUSIVE);
- if (error != 0) {
- vrele(nvp);
- goto out;
- }
- vput(nvp);
- goto relock;
- }
- *tvpp = nvp;
- }
-
- return (0);
-
-out:
- return (error);
-}
-
-/*
- * Note that we must use VRELE_ASYNC in this function as it walks
- * up the directory tree and vrele may need to acquire an exclusive
- * lock if a last reference to a vnode is dropped.
- */
-static int
-zfs_rename_check(znode_t *szp, znode_t *sdzp, znode_t *tdzp)
-{
- zfsvfs_t *zfsvfs;
- znode_t *zp, *zp1;
- uint64_t parent;
- int error;
-
- zfsvfs = tdzp->z_zfsvfs;
- if (tdzp == szp)
- return (SET_ERROR(EINVAL));
- if (tdzp == sdzp)
- return (0);
- if (tdzp->z_id == zfsvfs->z_root)
- return (0);
- zp = tdzp;
- for (;;) {
- ASSERT(!zp->z_unlinked);
- if ((error = sa_lookup(zp->z_sa_hdl,
- SA_ZPL_PARENT(zfsvfs), &parent, sizeof (parent))) != 0)
- break;
-
- if (parent == szp->z_id) {
- error = SET_ERROR(EINVAL);
- break;
- }
- if (parent == zfsvfs->z_root)
- break;
- if (parent == sdzp->z_id)
- break;
-
- error = zfs_zget(zfsvfs, parent, &zp1);
- if (error != 0)
- break;
-
- if (zp != tdzp)
- VN_RELE_ASYNC(ZTOV(zp),
- dsl_pool_zrele_taskq(
- dmu_objset_pool(zfsvfs->z_os)));
- zp = zp1;
- }
-
- if (error == ENOTDIR)
- panic("checkpath: .. not a directory\n");
- if (zp != tdzp)
- VN_RELE_ASYNC(ZTOV(zp),
- dsl_pool_zrele_taskq(dmu_objset_pool(zfsvfs->z_os)));
- return (error);
-}
-
-#if __FreeBSD_version < 1300110
-static void
-cache_rename(struct vnode *fdvp, struct vnode *fvp, struct vnode *tdvp,
- struct vnode *tvp, struct componentname *fcnp, struct componentname *tcnp)
-{
-
- cache_purge(fvp);
- if (tvp != NULL)
- cache_purge(tvp);
- cache_purge_negative(tdvp);
-}
-#endif
-
-/*
- * Move an entry from the provided source directory to the target
- * directory. Change the entry name as indicated.
- *
- * IN: sdvp - Source directory containing the "old entry".
- * snm - Old entry name.
- * tdvp - Target directory to contain the "new entry".
- * tnm - New entry name.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * sdvp,tdvp - ctime|mtime updated
- */
-/*ARGSUSED*/
-static int
-zfs_rename_(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp,
- vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp,
- cred_t *cr, int log)
-{
- zfsvfs_t *zfsvfs;
- znode_t *sdzp, *tdzp, *szp, *tzp;
- zilog_t *zilog = NULL;
- dmu_tx_t *tx;
- const char *snm = scnp->cn_nameptr;
- const char *tnm = tcnp->cn_nameptr;
- int error = 0;
- bool want_seqc_end __maybe_unused = false;
-
- /* Reject renames across filesystems. */
- if ((*svpp)->v_mount != tdvp->v_mount ||
- ((*tvpp) != NULL && (*svpp)->v_mount != (*tvpp)->v_mount)) {
- error = SET_ERROR(EXDEV);
- goto out;
- }
-
- if (zfsctl_is_node(tdvp)) {
- error = SET_ERROR(EXDEV);
- goto out;
- }
-
- /*
- * Lock all four vnodes to ensure safety and semantics of renaming.
- */
- error = zfs_rename_relock(sdvp, svpp, tdvp, tvpp, scnp, tcnp);
- if (error != 0) {
- /* no vnodes are locked in the case of error here */
- return (error);
- }
-
- tdzp = VTOZ(tdvp);
- sdzp = VTOZ(sdvp);
- zfsvfs = tdzp->z_zfsvfs;
- zilog = zfsvfs->z_log;
-
- /*
- * After we re-enter ZFS_ENTER() we will have to revalidate all
- * znodes involved.
- */
- ZFS_ENTER(zfsvfs);
-
- if (zfsvfs->z_utf8 && u8_validate(tnm,
- strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- error = SET_ERROR(EILSEQ);
- goto unlockout;
- }
-
- /* If source and target are the same file, there is nothing to do. */
- if ((*svpp) == (*tvpp)) {
- error = 0;
- goto unlockout;
- }
-
- if (((*svpp)->v_type == VDIR && (*svpp)->v_mountedhere != NULL) ||
- ((*tvpp) != NULL && (*tvpp)->v_type == VDIR &&
- (*tvpp)->v_mountedhere != NULL)) {
- error = SET_ERROR(EXDEV);
- goto unlockout;
- }
-
- /*
- * We can not use ZFS_VERIFY_ZP() here because it could directly return
- * bypassing the cleanup code in the case of an error.
- */
- if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
- error = SET_ERROR(EIO);
- goto unlockout;
- }
-
- szp = VTOZ(*svpp);
- tzp = *tvpp == NULL ? NULL : VTOZ(*tvpp);
- if (szp->z_sa_hdl == NULL || (tzp != NULL && tzp->z_sa_hdl == NULL)) {
- error = SET_ERROR(EIO);
- goto unlockout;
- }
-
- /*
- * This is to prevent the creation of links into attribute space
- * by renaming a linked file into/outof an attribute directory.
- * See the comment in zfs_link() for why this is considered bad.
- */
- if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) {
- error = SET_ERROR(EINVAL);
- goto unlockout;
- }
-
- /*
- * If we are using project inheritance, means if the directory has
- * ZFS_PROJINHERIT set, then its descendant directories will inherit
- * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
- * such case, we only allow renames into our tree when the project
- * IDs are the same.
- */
- if (tdzp->z_pflags & ZFS_PROJINHERIT &&
- tdzp->z_projid != szp->z_projid) {
- error = SET_ERROR(EXDEV);
- goto unlockout;
- }
-
- /*
- * Must have write access at the source to remove the old entry
- * and write access at the target to create the new entry.
- * Note that if target and source are the same, this can be
- * done in a single check.
- */
- if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)))
- goto unlockout;
-
- if ((*svpp)->v_type == VDIR) {
- /*
- * Avoid ".", "..", and aliases of "." for obvious reasons.
- */
- if ((scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.') ||
- sdzp == szp ||
- (scnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) {
- error = EINVAL;
- goto unlockout;
- }
-
- /*
- * Check to make sure rename is valid.
- * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
- */
- if ((error = zfs_rename_check(szp, sdzp, tdzp)))
- goto unlockout;
- }
-
- /*
- * Does target exist?
- */
- if (tzp) {
- /*
- * Source and target must be the same type.
- */
- if ((*svpp)->v_type == VDIR) {
- if ((*tvpp)->v_type != VDIR) {
- error = SET_ERROR(ENOTDIR);
- goto unlockout;
- } else {
- cache_purge(tdvp);
- if (sdvp != tdvp)
- cache_purge(sdvp);
- }
- } else {
- if ((*tvpp)->v_type == VDIR) {
- error = SET_ERROR(EISDIR);
- goto unlockout;
- }
- }
- }
-
- vn_seqc_write_begin(*svpp);
- vn_seqc_write_begin(sdvp);
- if (*tvpp != NULL)
- vn_seqc_write_begin(*tvpp);
- if (tdvp != *tvpp)
- vn_seqc_write_begin(tdvp);
-#if __FreeBSD_version >= 1300102
- want_seqc_end = true;
-#endif
- vnevent_rename_src(*svpp, sdvp, scnp->cn_nameptr, ct);
- if (tzp)
- vnevent_rename_dest(*tvpp, tdvp, tnm, ct);
-
- /*
- * notify the target directory if it is not the same
- * as source directory.
- */
- if (tdvp != sdvp) {
- vnevent_rename_dest_dir(tdvp, ct);
- }
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
- dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
- if (sdzp != tdzp) {
- dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, tdzp);
- }
- if (tzp) {
- dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, tzp);
- }
-
- zfs_sa_upgrade_txholds(tx, szp);
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- goto unlockout;
- }
-
-
- if (tzp) /* Attempt to remove the existing target */
- error = zfs_link_destroy(tdzp, tnm, tzp, tx, 0, NULL);
-
- if (error == 0) {
- error = zfs_link_create(tdzp, tnm, szp, tx, ZRENAMING);
- if (error == 0) {
- szp->z_pflags |= ZFS_AV_MODIFIED;
-
- error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
- (void *)&szp->z_pflags, sizeof (uint64_t), tx);
- ASSERT0(error);
-
- error = zfs_link_destroy(sdzp, snm, szp, tx, ZRENAMING,
- NULL);
- if (error == 0) {
- zfs_log_rename(zilog, tx, TX_RENAME, sdzp,
- snm, tdzp, tnm, szp);
-
- /*
- * Update path information for the target vnode
- */
- vn_renamepath(tdvp, *svpp, tnm, strlen(tnm));
- } else {
- /*
- * At this point, we have successfully created
- * the target name, but have failed to remove
- * the source name. Since the create was done
- * with the ZRENAMING flag, there are
- * complications; for one, the link count is
- * wrong. The easiest way to deal with this
- * is to remove the newly created target, and
- * return the original error. This must
- * succeed; fortunately, it is very unlikely to
- * fail, since we just created it.
- */
- VERIFY3U(zfs_link_destroy(tdzp, tnm, szp, tx,
- ZRENAMING, NULL), ==, 0);
- }
- }
- if (error == 0) {
- cache_rename(sdvp, *svpp, tdvp, *tvpp, scnp, tcnp);
- }
- }
-
- dmu_tx_commit(tx);
-
-unlockout: /* all 4 vnodes are locked, ZFS_ENTER called */
- ZFS_EXIT(zfsvfs);
- if (want_seqc_end) {
- vn_seqc_write_end(*svpp);
- vn_seqc_write_end(sdvp);
- if (*tvpp != NULL)
- vn_seqc_write_end(*tvpp);
- if (tdvp != *tvpp)
- vn_seqc_write_end(tdvp);
- want_seqc_end = false;
- }
- VOP_UNLOCK1(*svpp);
- VOP_UNLOCK1(sdvp);
-
-out: /* original two vnodes are locked */
- MPASS(!want_seqc_end);
- if (error == 0 && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- if (*tvpp != NULL)
- VOP_UNLOCK1(*tvpp);
- if (tdvp != *tvpp)
- VOP_UNLOCK1(tdvp);
- return (error);
-}
-
-int
-zfs_rename(znode_t *sdzp, const char *sname, znode_t *tdzp, const char *tname,
- cred_t *cr, int flags)
-{
- struct componentname scn, tcn;
- vnode_t *sdvp, *tdvp;
- vnode_t *svp, *tvp;
- int error;
- svp = tvp = NULL;
-
- sdvp = ZTOV(sdzp);
- tdvp = ZTOV(tdzp);
- error = zfs_lookup_internal(sdzp, sname, &svp, &scn, DELETE);
- if (sdzp->z_zfsvfs->z_replay == B_FALSE)
- VOP_UNLOCK1(sdvp);
- if (error != 0)
- goto fail;
- VOP_UNLOCK1(svp);
-
- vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY);
- error = zfs_lookup_internal(tdzp, tname, &tvp, &tcn, RENAME);
- if (error == EJUSTRETURN)
- tvp = NULL;
- else if (error != 0) {
- VOP_UNLOCK1(tdvp);
- goto fail;
- }
-
- error = zfs_rename_(sdvp, &svp, &scn, tdvp, &tvp, &tcn, cr, 0);
-fail:
- if (svp != NULL)
- vrele(svp);
- if (tvp != NULL)
- vrele(tvp);
-
- return (error);
-}
-
-/*
- * Insert the indicated symbolic reference entry into the directory.
- *
- * IN: dvp - Directory to contain new symbolic link.
- * link - Name for new symlink entry.
- * vap - Attributes of new entry.
- * cr - credentials of caller.
- * ct - caller context
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dvp - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_symlink(znode_t *dzp, const char *name, vattr_t *vap,
- const char *link, znode_t **zpp, cred_t *cr, int flags)
-{
- znode_t *zp;
- dmu_tx_t *tx;
- zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
- zilog_t *zilog;
- uint64_t len = strlen(link);
- int error;
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
- uint64_t txtype = TX_SYMLINK;
-
- ASSERT(vap->va_type == VLNK);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- if (len > MAXPATHLEN) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENAMETOOLONG));
- }
-
- if ((error = zfs_acl_ids_create(dzp, 0,
- vap, cr, NULL, &acl_ids)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Attempt to lock directory; fail if entry already exists.
- */
- error = zfs_dirent_lookup(dzp, name, &zp, ZNEW);
- if (error) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids,
- 0 /* projid */)) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EDQUOT));
- }
-
- getnewvnode_reserve_();
- tx = dmu_tx_create(zfsvfs->z_os);
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE + len);
- dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
- if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
- acl_ids.z_aclp->z_acl_bytes);
- }
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- getnewvnode_drop_reserve();
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Create a new object for the symlink.
- * for version 4 ZPL datsets the symlink will be an SA attribute
- */
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- if (zp->z_is_sa)
- error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs),
- __DECONST(void *, link), len, tx);
- else
- zfs_sa_symlink(zp, __DECONST(char *, link), len, tx);
-
- zp->z_size = len;
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
- &zp->z_size, sizeof (zp->z_size), tx);
- /*
- * Insert the new object into the directory.
- */
- (void) zfs_link_create(dzp, name, zp, tx, ZNEW);
-
- zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
- *zpp = zp;
-
- zfs_acl_ids_free(&acl_ids);
-
- dmu_tx_commit(tx);
-
- getnewvnode_drop_reserve();
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Return, in the buffer contained in the provided uio structure,
- * the symbolic path referred to by vp.
- *
- * IN: vp - vnode of symbolic link.
- * uio - structure to contain the link path.
- * cr - credentials of caller.
- * ct - caller context
- *
- * OUT: uio - structure containing the link path.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * vp - atime updated
- */
-/* ARGSUSED */
-static int
-zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (zp->z_is_sa)
- error = sa_lookup_uio(zp->z_sa_hdl,
- SA_ZPL_SYMLINK(zfsvfs), uio);
- else
- error = zfs_sa_readlink(zp, uio);
-
- ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Insert a new entry into directory tdvp referencing svp.
- *
- * IN: tdvp - Directory to contain new entry.
- * svp - vnode of new entry.
- * name - name of new entry.
- * cr - credentials of caller.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * tdvp - ctime|mtime updated
- * svp - ctime updated
- */
-/* ARGSUSED */
-int
-zfs_link(znode_t *tdzp, znode_t *szp, const char *name, cred_t *cr,
- int flags)
-{
- znode_t *tzp;
- zfsvfs_t *zfsvfs = tdzp->z_zfsvfs;
- zilog_t *zilog;
- dmu_tx_t *tx;
- int error;
- uint64_t parent;
- uid_t owner;
-
- ASSERT(ZTOV(tdzp)->v_type == VDIR);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(tdzp);
- zilog = zfsvfs->z_log;
-
- /*
- * POSIX dictates that we return EPERM here.
- * Better choices include ENOTSUP or EISDIR.
- */
- if (ZTOV(szp)->v_type == VDIR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- ZFS_VERIFY_ZP(szp);
-
- /*
- * If we are using project inheritance, means if the directory has
- * ZFS_PROJINHERIT set, then its descendant directories will inherit
- * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
- * such case, we only allow hard link creation in our tree when the
- * project IDs are the same.
- */
- if (tdzp->z_pflags & ZFS_PROJINHERIT &&
- tdzp->z_projid != szp->z_projid) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EXDEV));
- }
-
- if (szp->z_pflags & (ZFS_APPENDONLY |
- ZFS_IMMUTABLE | ZFS_READONLY)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- /* Prevent links to .zfs/shares files */
-
- if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
- &parent, sizeof (uint64_t))) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- if (parent == zfsvfs->z_shares_dir) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if (zfsvfs->z_utf8 && u8_validate(name,
- strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- /*
- * We do not support links between attributes and non-attributes
- * because of the potential security risk of creating links
- * into "normal" file space in order to circumvent restrictions
- * imposed in attribute space.
- */
- if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
-
- owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER);
- if (owner != crgetuid(cr) && secpolicy_basic_link(ZTOV(szp), cr) != 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Attempt to lock directory; fail if entry already exists.
- */
- error = zfs_dirent_lookup(tdzp, name, &tzp, ZNEW);
- if (error) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name);
- zfs_sa_upgrade_txholds(tx, szp);
- zfs_sa_upgrade_txholds(tx, tdzp);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- error = zfs_link_create(tdzp, name, szp, tx, 0);
-
- if (error == 0) {
- uint64_t txtype = TX_LINK;
- zfs_log_link(zilog, tx, txtype, tdzp, szp, name);
- }
-
- dmu_tx_commit(tx);
-
- if (error == 0) {
- vnevent_link(ZTOV(szp), ct);
- }
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Free or allocate space in a file. Currently, this function only
- * supports the `F_FREESP' command. However, this command is somewhat
- * misnamed, as its functionality includes the ability to allocate as
- * well as free space.
- *
- * IN: ip - inode of file to free data in.
- * cmd - action to take (only F_FREESP supported).
- * bfp - section of file to free/alloc.
- * flag - current file open mode flags.
- * offset - current file offset.
- * cr - credentials of caller.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * ip - ctime|mtime updated
- */
-/* ARGSUSED */
-int
-zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
- offset_t offset, cred_t *cr)
-{
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- uint64_t off, len;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (cmd != F_FREESP) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Callers might not be able to detect properly that we are read-only,
- * so check it explicitly here.
- */
- if (zfs_is_readonly(zfsvfs)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EROFS));
- }
-
- if (bfp->l_len < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Permissions aren't checked on Solaris because on this OS
- * zfs_space() can only be called with an opened file handle.
- * On Linux we can get here through truncate_range() which
- * operates directly on inodes, so we need to check access rights.
- */
- if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- off = bfp->l_start;
- len = bfp->l_len; /* 0 means from off to end of file */
-
- error = zfs_freesp(zp, off, len, flag, TRUE);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*ARGSUSED*/
-static void
-zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error;
-
- ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs);
- if (zp->z_sa_hdl == NULL) {
- /*
- * The fs has been unmounted, or we did a
- * suspend/resume and this file no longer exists.
- */
- ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
- vrecycle(vp);
- return;
- }
-
- if (zp->z_unlinked) {
- /*
- * Fast path to recycle a vnode of a removed file.
- */
- ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
- vrecycle(vp);
- return;
- }
-
- if (zp->z_atime_dirty && zp->z_unlinked == 0) {
- dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
-
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- } else {
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs),
- (void *)&zp->z_atime, sizeof (zp->z_atime), tx);
- zp->z_atime_dirty = 0;
- dmu_tx_commit(tx);
- }
- }
- ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
-}
-
-
-CTASSERT(sizeof (struct zfid_short) <= sizeof (struct fid));
-CTASSERT(sizeof (struct zfid_long) <= sizeof (struct fid));
-
-/*ARGSUSED*/
-static int
-zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- uint32_t gen;
- uint64_t gen64;
- uint64_t object = zp->z_id;
- zfid_short_t *zfid;
- int size, i, error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs),
- &gen64, sizeof (uint64_t))) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- gen = (uint32_t)gen64;
-
- size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN;
- fidp->fid_len = size;
-
- zfid = (zfid_short_t *)fidp;
-
- zfid->zf_len = size;
-
- for (i = 0; i < sizeof (zfid->zf_object); i++)
- zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
-
- /* Must have a non-zero generation number to distinguish from .zfs */
- if (gen == 0)
- gen = 1;
- for (i = 0; i < sizeof (zfid->zf_gen); i++)
- zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
-
- if (size == LONG_FID_LEN) {
- uint64_t objsetid = dmu_objset_id(zfsvfs->z_os);
- zfid_long_t *zlfid;
-
- zlfid = (zfid_long_t *)fidp;
-
- for (i = 0; i < sizeof (zlfid->zf_setid); i++)
- zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i));
-
- /* XXX - this should be the generation number for the objset */
- for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
- zlfid->zf_setgen[i] = 0;
- }
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-static int
-zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
- caller_context_t *ct)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs;
-
- switch (cmd) {
- case _PC_LINK_MAX:
- *valp = MIN(LONG_MAX, ZFS_LINK_MAX);
- return (0);
-
- case _PC_FILESIZEBITS:
- *valp = 64;
- return (0);
- case _PC_MIN_HOLE_SIZE:
- *valp = (int)SPA_MINBLOCKSIZE;
- return (0);
- case _PC_ACL_EXTENDED:
-#if 0 /* POSIX ACLs are not implemented for ZFS on FreeBSD yet. */
- zp = VTOZ(vp);
- zfsvfs = zp->z_zfsvfs;
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- *valp = zfsvfs->z_acl_type == ZFSACLTYPE_POSIX ? 1 : 0;
- ZFS_EXIT(zfsvfs);
-#else
- *valp = 0;
-#endif
- return (0);
-
- case _PC_ACL_NFS4:
- zp = VTOZ(vp);
- zfsvfs = zp->z_zfsvfs;
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- *valp = zfsvfs->z_acl_type == ZFS_ACLTYPE_NFSV4 ? 1 : 0;
- ZFS_EXIT(zfsvfs);
- return (0);
-
- case _PC_ACL_PATH_MAX:
- *valp = ACL_MAX_ENTRIES;
- return (0);
-
- default:
- return (EOPNOTSUPP);
- }
-}
-
-/*ARGSUSED*/
-static int
-zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
- caller_context_t *ct)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error;
- boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- error = zfs_getacl(zp, vsecp, skipaclchk, cr);
- ZFS_EXIT(zfsvfs);
-
- return (error);
-}
-
-/*ARGSUSED*/
-int
-zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
-{
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int error;
- boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- zilog_t *zilog = zfsvfs->z_log;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- error = zfs_setacl(zp, vsecp, skipaclchk, cr);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-static int
-zfs_getpages(struct vnode *vp, vm_page_t *ma, int count, int *rbehind,
- int *rahead)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- objset_t *os = zp->z_zfsvfs->z_os;
- zfs_locked_range_t *lr;
- vm_object_t object;
- off_t start, end, obj_size;
- uint_t blksz;
- int pgsin_b, pgsin_a;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- start = IDX_TO_OFF(ma[0]->pindex);
- end = IDX_TO_OFF(ma[count - 1]->pindex + 1);
-
- /*
- * Lock a range covering all required and optional pages.
- * Note that we need to handle the case of the block size growing.
- */
- for (;;) {
- blksz = zp->z_blksz;
- lr = zfs_rangelock_tryenter(&zp->z_rangelock,
- rounddown(start, blksz),
- roundup(end, blksz) - rounddown(start, blksz), RL_READER);
- if (lr == NULL) {
- if (rahead != NULL) {
- *rahead = 0;
- rahead = NULL;
- }
- if (rbehind != NULL) {
- *rbehind = 0;
- rbehind = NULL;
- }
- break;
- }
- if (blksz == zp->z_blksz)
- break;
- zfs_rangelock_exit(lr);
- }
-
- object = ma[0]->object;
- zfs_vmobject_wlock(object);
- obj_size = object->un_pager.vnp.vnp_size;
- zfs_vmobject_wunlock(object);
- if (IDX_TO_OFF(ma[count - 1]->pindex) >= obj_size) {
- if (lr != NULL)
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (zfs_vm_pagerret_bad);
- }
-
- pgsin_b = 0;
- if (rbehind != NULL) {
- pgsin_b = OFF_TO_IDX(start - rounddown(start, blksz));
- pgsin_b = MIN(*rbehind, pgsin_b);
- }
-
- pgsin_a = 0;
- if (rahead != NULL) {
- pgsin_a = OFF_TO_IDX(roundup(end, blksz) - end);
- if (end + IDX_TO_OFF(pgsin_a) >= obj_size)
- pgsin_a = OFF_TO_IDX(round_page(obj_size) - end);
- pgsin_a = MIN(*rahead, pgsin_a);
- }
-
- /*
- * NB: we need to pass the exact byte size of the data that we expect
- * to read after accounting for the file size. This is required because
- * ZFS will panic if we request DMU to read beyond the end of the last
- * allocated block.
- */
- error = dmu_read_pages(os, zp->z_id, ma, count, &pgsin_b, &pgsin_a,
- MIN(end, obj_size) - (end - PAGE_SIZE));
-
- if (lr != NULL)
- zfs_rangelock_exit(lr);
- ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
- ZFS_EXIT(zfsvfs);
-
- if (error != 0)
- return (zfs_vm_pagerret_error);
-
- VM_CNT_INC(v_vnodein);
- VM_CNT_ADD(v_vnodepgsin, count + pgsin_b + pgsin_a);
- if (rbehind != NULL)
- *rbehind = pgsin_b;
- if (rahead != NULL)
- *rahead = pgsin_a;
- return (zfs_vm_pagerret_ok);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_getpages_args {
- struct vnode *a_vp;
- vm_page_t *a_m;
- int a_count;
- int *a_rbehind;
- int *a_rahead;
-};
-#endif
-
-static int
-zfs_freebsd_getpages(struct vop_getpages_args *ap)
-{
-
- return (zfs_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind,
- ap->a_rahead));
-}
-
-static int
-zfs_putpages(struct vnode *vp, vm_page_t *ma, size_t len, int flags,
- int *rtvals)
-{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- zfs_locked_range_t *lr;
- dmu_tx_t *tx;
- struct sf_buf *sf;
- vm_object_t object;
- vm_page_t m;
- caddr_t va;
- size_t tocopy;
- size_t lo_len;
- vm_ooffset_t lo_off;
- vm_ooffset_t off;
- uint_t blksz;
- int ncount;
- int pcount;
- int err;
- int i;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- object = vp->v_object;
- pcount = btoc(len);
- ncount = pcount;
-
- KASSERT(ma[0]->object == object, ("mismatching object"));
- KASSERT(len > 0 && (len & PAGE_MASK) == 0, ("unexpected length"));
-
- for (i = 0; i < pcount; i++)
- rtvals[i] = zfs_vm_pagerret_error;
-
- off = IDX_TO_OFF(ma[0]->pindex);
- blksz = zp->z_blksz;
- lo_off = rounddown(off, blksz);
- lo_len = roundup(len + (off - lo_off), blksz);
- lr = zfs_rangelock_enter(&zp->z_rangelock, lo_off, lo_len, RL_WRITER);
-
- zfs_vmobject_wlock(object);
- if (len + off > object->un_pager.vnp.vnp_size) {
- if (object->un_pager.vnp.vnp_size > off) {
- int pgoff;
-
- len = object->un_pager.vnp.vnp_size - off;
- ncount = btoc(len);
- if ((pgoff = (int)len & PAGE_MASK) != 0) {
- /*
- * If the object is locked and the following
- * conditions hold, then the page's dirty
- * field cannot be concurrently changed by a
- * pmap operation.
- */
- m = ma[ncount - 1];
- vm_page_assert_sbusied(m);
- KASSERT(!pmap_page_is_write_mapped(m),
- ("zfs_putpages: page %p is not read-only",
- m));
- vm_page_clear_dirty(m, pgoff, PAGE_SIZE -
- pgoff);
- }
- } else {
- len = 0;
- ncount = 0;
- }
- if (ncount < pcount) {
- for (i = ncount; i < pcount; i++) {
- rtvals[i] = zfs_vm_pagerret_bad;
- }
- }
- }
- zfs_vmobject_wunlock(object);
-
- if (ncount == 0)
- goto out;
-
- if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, zp->z_uid) ||
- zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, zp->z_gid) ||
- (zp->z_projid != ZFS_DEFAULT_PROJID &&
- zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
- zp->z_projid))) {
- goto out;
- }
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_write(tx, zp->z_id, off, len);
-
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err != 0) {
- dmu_tx_abort(tx);
- goto out;
- }
-
- if (zp->z_blksz < PAGE_SIZE) {
- for (i = 0; len > 0; off += tocopy, len -= tocopy, i++) {
- tocopy = len > PAGE_SIZE ? PAGE_SIZE : len;
- va = zfs_map_page(ma[i], &sf);
- dmu_write(zfsvfs->z_os, zp->z_id, off, tocopy, va, tx);
- zfs_unmap_page(sf);
- }
- } else {
- err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, ma, tx);
- }
-
- if (err == 0) {
- uint64_t mtime[2], ctime[2];
- sa_bulk_attr_t bulk[3];
- int count = 0;
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
- &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
- &ctime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, 8);
- zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
- err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- ASSERT0(err);
- /*
- * XXX we should be passing a callback to undirty
- * but that would make the locking messier
- */
- zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off,
- len, 0, NULL, NULL);
-
- zfs_vmobject_wlock(object);
- for (i = 0; i < ncount; i++) {
- rtvals[i] = zfs_vm_pagerret_ok;
- vm_page_undirty(ma[i]);
- }
- zfs_vmobject_wunlock(object);
- VM_CNT_INC(v_vnodeout);
- VM_CNT_ADD(v_vnodepgsout, ncount);
- }
- dmu_tx_commit(tx);
-
-out:
- zfs_rangelock_exit(lr);
- if ((flags & (zfs_vm_pagerput_sync | zfs_vm_pagerput_inval)) != 0 ||
- zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zfsvfs->z_log, zp->z_id);
- ZFS_EXIT(zfsvfs);
- return (rtvals[0]);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_putpages_args {
- struct vnode *a_vp;
- vm_page_t *a_m;
- int a_count;
- int a_sync;
- int *a_rtvals;
-};
-#endif
-
-static int
-zfs_freebsd_putpages(struct vop_putpages_args *ap)
-{
-
- return (zfs_putpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_sync,
- ap->a_rtvals));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_bmap_args {
- struct vnode *a_vp;
- daddr_t a_bn;
- struct bufobj **a_bop;
- daddr_t *a_bnp;
- int *a_runp;
- int *a_runb;
-};
-#endif
-
-static int
-zfs_freebsd_bmap(struct vop_bmap_args *ap)
-{
-
- if (ap->a_bop != NULL)
- *ap->a_bop = &ap->a_vp->v_bufobj;
- if (ap->a_bnp != NULL)
- *ap->a_bnp = ap->a_bn;
- if (ap->a_runp != NULL)
- *ap->a_runp = 0;
- if (ap->a_runb != NULL)
- *ap->a_runb = 0;
-
- return (0);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_open_args {
- struct vnode *a_vp;
- int a_mode;
- struct ucred *a_cred;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_open(struct vop_open_args *ap)
-{
- vnode_t *vp = ap->a_vp;
- znode_t *zp = VTOZ(vp);
- int error;
-
- error = zfs_open(&vp, ap->a_mode, ap->a_cred);
- if (error == 0)
- vnode_create_vobject(vp, zp->z_size, ap->a_td);
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_close_args {
- struct vnode *a_vp;
- int a_fflag;
- struct ucred *a_cred;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_close(struct vop_close_args *ap)
-{
-
- return (zfs_close(ap->a_vp, ap->a_fflag, 1, 0, ap->a_cred));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_ioctl_args {
- struct vnode *a_vp;
- ulong_t a_command;
- caddr_t a_data;
- int a_fflag;
- struct ucred *cred;
- struct thread *td;
-};
-#endif
-
-static int
-zfs_freebsd_ioctl(struct vop_ioctl_args *ap)
-{
-
- return (zfs_ioctl(ap->a_vp, ap->a_command, (intptr_t)ap->a_data,
- ap->a_fflag, ap->a_cred, NULL));
-}
-
-static int
-ioflags(int ioflags)
-{
- int flags = 0;
-
- if (ioflags & IO_APPEND)
- flags |= FAPPEND;
- if (ioflags & IO_NDELAY)
- flags |= FNONBLOCK;
- if (ioflags & IO_SYNC)
- flags |= (FSYNC | FDSYNC | FRSYNC);
-
- return (flags);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_read_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
-};
-#endif
-
-static int
-zfs_freebsd_read(struct vop_read_args *ap)
-{
-
- return (zfs_read(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag),
- ap->a_cred));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_write_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
-};
-#endif
-
-static int
-zfs_freebsd_write(struct vop_write_args *ap)
-{
-
- return (zfs_write(ap->a_vp, ap->a_uio, ioflags(ap->a_ioflag),
- ap->a_cred));
-}
-
-#if __FreeBSD_version >= 1300102
-/*
- * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see
- * the comment above cache_fplookup for details.
- */
-static int
-zfs_freebsd_fplookup_vexec(struct vop_fplookup_vexec_args *v)
-{
- vnode_t *vp;
- znode_t *zp;
- uint64_t pflags;
-
- vp = v->a_vp;
- zp = VTOZ_SMR(vp);
- if (__predict_false(zp == NULL))
- return (EAGAIN);
- pflags = atomic_load_64(&zp->z_pflags);
- if (pflags & ZFS_AV_QUARANTINED)
- return (EAGAIN);
- if (pflags & ZFS_XATTR)
- return (EAGAIN);
- if ((pflags & ZFS_NO_EXECS_DENIED) == 0)
- return (EAGAIN);
- return (0);
-}
-#endif
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_access_args {
- struct vnode *a_vp;
- accmode_t a_accmode;
- struct ucred *a_cred;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_access(struct vop_access_args *ap)
-{
- vnode_t *vp = ap->a_vp;
- znode_t *zp = VTOZ(vp);
- accmode_t accmode;
- int error = 0;
-
-
- if (ap->a_accmode == VEXEC) {
- if (zfs_fastaccesschk_execute(zp, ap->a_cred) == 0)
- return (0);
- }
-
- /*
- * ZFS itself only knowns about VREAD, VWRITE, VEXEC and VAPPEND,
- */
- accmode = ap->a_accmode & (VREAD|VWRITE|VEXEC|VAPPEND);
- if (accmode != 0)
- error = zfs_access(ap->a_vp, accmode, 0, ap->a_cred, NULL);
-
- /*
- * VADMIN has to be handled by vaccess().
- */
- if (error == 0) {
- accmode = ap->a_accmode & ~(VREAD|VWRITE|VEXEC|VAPPEND);
- if (accmode != 0) {
-#if __FreeBSD_version >= 1300105
- error = vaccess(vp->v_type, zp->z_mode, zp->z_uid,
- zp->z_gid, accmode, ap->a_cred);
-#else
- error = vaccess(vp->v_type, zp->z_mode, zp->z_uid,
- zp->z_gid, accmode, ap->a_cred, NULL);
-#endif
- }
- }
-
- /*
- * For VEXEC, ensure that at least one execute bit is set for
- * non-directories.
- */
- if (error == 0 && (ap->a_accmode & VEXEC) != 0 && vp->v_type != VDIR &&
- (zp->z_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) {
- error = EACCES;
- }
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_lookup_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
-};
-#endif
-
-static int
-zfs_freebsd_lookup(struct vop_lookup_args *ap, boolean_t cached)
-{
- struct componentname *cnp = ap->a_cnp;
- char nm[NAME_MAX + 1];
-
- ASSERT(cnp->cn_namelen < sizeof (nm));
- strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof (nm)));
-
- return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop,
- cnp->cn_cred, cnp->cn_thread, 0, cached));
-}
-
-static int
-zfs_freebsd_cachedlookup(struct vop_cachedlookup_args *ap)
-{
-
- return (zfs_freebsd_lookup((struct vop_lookup_args *)ap, B_TRUE));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_lookup_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
-};
-#endif
-
-static int
-zfs_cache_lookup(struct vop_lookup_args *ap)
-{
- zfsvfs_t *zfsvfs;
-
- zfsvfs = ap->a_dvp->v_mount->mnt_data;
- if (zfsvfs->z_use_namecache)
- return (vfs_cache_lookup(ap));
- else
- return (zfs_freebsd_lookup(ap, B_FALSE));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_create_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
-};
-#endif
-
-static int
-zfs_freebsd_create(struct vop_create_args *ap)
-{
- zfsvfs_t *zfsvfs;
- struct componentname *cnp = ap->a_cnp;
- vattr_t *vap = ap->a_vap;
- znode_t *zp = NULL;
- int rc, mode;
-
- ASSERT(cnp->cn_flags & SAVENAME);
-
- vattr_init_mask(vap);
- mode = vap->va_mode & ALLPERMS;
- zfsvfs = ap->a_dvp->v_mount->mnt_data;
- *ap->a_vpp = NULL;
-
- rc = zfs_create(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap, !EXCL, mode,
- &zp, cnp->cn_cred, 0 /* flag */, NULL /* vsecattr */);
- if (rc == 0)
- *ap->a_vpp = ZTOV(zp);
- if (zfsvfs->z_use_namecache &&
- rc == 0 && (cnp->cn_flags & MAKEENTRY) != 0)
- cache_enter(ap->a_dvp, *ap->a_vpp, cnp);
-
- return (rc);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_remove_args {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
-};
-#endif
-
-static int
-zfs_freebsd_remove(struct vop_remove_args *ap)
-{
-
- ASSERT(ap->a_cnp->cn_flags & SAVENAME);
-
- return (zfs_remove_(ap->a_dvp, ap->a_vp, ap->a_cnp->cn_nameptr,
- ap->a_cnp->cn_cred));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_mkdir_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
-};
-#endif
-
-static int
-zfs_freebsd_mkdir(struct vop_mkdir_args *ap)
-{
- vattr_t *vap = ap->a_vap;
- znode_t *zp = NULL;
- int rc;
-
- ASSERT(ap->a_cnp->cn_flags & SAVENAME);
-
- vattr_init_mask(vap);
- *ap->a_vpp = NULL;
-
- rc = zfs_mkdir(VTOZ(ap->a_dvp), ap->a_cnp->cn_nameptr, vap, &zp,
- ap->a_cnp->cn_cred, 0, NULL);
-
- if (rc == 0)
- *ap->a_vpp = ZTOV(zp);
- return (rc);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_rmdir_args {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
-};
-#endif
-
-static int
-zfs_freebsd_rmdir(struct vop_rmdir_args *ap)
-{
- struct componentname *cnp = ap->a_cnp;
-
- ASSERT(cnp->cn_flags & SAVENAME);
-
- return (zfs_rmdir_(ap->a_dvp, ap->a_vp, cnp->cn_nameptr, cnp->cn_cred));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_readdir_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- struct ucred *a_cred;
- int *a_eofflag;
- int *a_ncookies;
- ulong_t **a_cookies;
-};
-#endif
-
-static int
-zfs_freebsd_readdir(struct vop_readdir_args *ap)
-{
-
- return (zfs_readdir(ap->a_vp, ap->a_uio, ap->a_cred, ap->a_eofflag,
- ap->a_ncookies, ap->a_cookies));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_fsync_args {
- struct vnode *a_vp;
- int a_waitfor;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_fsync(struct vop_fsync_args *ap)
-{
-
- vop_stdfsync(ap);
- return (zfs_fsync(ap->a_vp, 0, ap->a_td->td_ucred, NULL));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_getattr_args {
- struct vnode *a_vp;
- struct vattr *a_vap;
- struct ucred *a_cred;
-};
-#endif
-
-static int
-zfs_freebsd_getattr(struct vop_getattr_args *ap)
-{
- vattr_t *vap = ap->a_vap;
- xvattr_t xvap;
- ulong_t fflags = 0;
- int error;
-
- xva_init(&xvap);
- xvap.xva_vattr = *vap;
- xvap.xva_vattr.va_mask |= AT_XVATTR;
-
- /* Convert chflags into ZFS-type flags. */
- /* XXX: what about SF_SETTABLE?. */
- XVA_SET_REQ(&xvap, XAT_IMMUTABLE);
- XVA_SET_REQ(&xvap, XAT_APPENDONLY);
- XVA_SET_REQ(&xvap, XAT_NOUNLINK);
- XVA_SET_REQ(&xvap, XAT_NODUMP);
- XVA_SET_REQ(&xvap, XAT_READONLY);
- XVA_SET_REQ(&xvap, XAT_ARCHIVE);
- XVA_SET_REQ(&xvap, XAT_SYSTEM);
- XVA_SET_REQ(&xvap, XAT_HIDDEN);
- XVA_SET_REQ(&xvap, XAT_REPARSE);
- XVA_SET_REQ(&xvap, XAT_OFFLINE);
- XVA_SET_REQ(&xvap, XAT_SPARSE);
-
- error = zfs_getattr(ap->a_vp, (vattr_t *)&xvap, 0, ap->a_cred);
- if (error != 0)
- return (error);
-
- /* Convert ZFS xattr into chflags. */
-#define FLAG_CHECK(fflag, xflag, xfield) do { \
- if (XVA_ISSET_RTN(&xvap, (xflag)) && (xfield) != 0) \
- fflags |= (fflag); \
-} while (0)
- FLAG_CHECK(SF_IMMUTABLE, XAT_IMMUTABLE,
- xvap.xva_xoptattrs.xoa_immutable);
- FLAG_CHECK(SF_APPEND, XAT_APPENDONLY,
- xvap.xva_xoptattrs.xoa_appendonly);
- FLAG_CHECK(SF_NOUNLINK, XAT_NOUNLINK,
- xvap.xva_xoptattrs.xoa_nounlink);
- FLAG_CHECK(UF_ARCHIVE, XAT_ARCHIVE,
- xvap.xva_xoptattrs.xoa_archive);
- FLAG_CHECK(UF_NODUMP, XAT_NODUMP,
- xvap.xva_xoptattrs.xoa_nodump);
- FLAG_CHECK(UF_READONLY, XAT_READONLY,
- xvap.xva_xoptattrs.xoa_readonly);
- FLAG_CHECK(UF_SYSTEM, XAT_SYSTEM,
- xvap.xva_xoptattrs.xoa_system);
- FLAG_CHECK(UF_HIDDEN, XAT_HIDDEN,
- xvap.xva_xoptattrs.xoa_hidden);
- FLAG_CHECK(UF_REPARSE, XAT_REPARSE,
- xvap.xva_xoptattrs.xoa_reparse);
- FLAG_CHECK(UF_OFFLINE, XAT_OFFLINE,
- xvap.xva_xoptattrs.xoa_offline);
- FLAG_CHECK(UF_SPARSE, XAT_SPARSE,
- xvap.xva_xoptattrs.xoa_sparse);
-
-#undef FLAG_CHECK
- *vap = xvap.xva_vattr;
- vap->va_flags = fflags;
- return (0);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_setattr_args {
- struct vnode *a_vp;
- struct vattr *a_vap;
- struct ucred *a_cred;
-};
-#endif
-
-static int
-zfs_freebsd_setattr(struct vop_setattr_args *ap)
-{
- vnode_t *vp = ap->a_vp;
- vattr_t *vap = ap->a_vap;
- cred_t *cred = ap->a_cred;
- xvattr_t xvap;
- ulong_t fflags;
- uint64_t zflags;
-
- vattr_init_mask(vap);
- vap->va_mask &= ~AT_NOSET;
-
- xva_init(&xvap);
- xvap.xva_vattr = *vap;
-
- zflags = VTOZ(vp)->z_pflags;
-
- if (vap->va_flags != VNOVAL) {
- zfsvfs_t *zfsvfs = VTOZ(vp)->z_zfsvfs;
- int error;
-
- if (zfsvfs->z_use_fuids == B_FALSE)
- return (EOPNOTSUPP);
-
- fflags = vap->va_flags;
- /*
- * XXX KDM
- * We need to figure out whether it makes sense to allow
- * UF_REPARSE through, since we don't really have other
- * facilities to handle reparse points and zfs_setattr()
- * doesn't currently allow setting that attribute anyway.
- */
- if ((fflags & ~(SF_IMMUTABLE|SF_APPEND|SF_NOUNLINK|UF_ARCHIVE|
- UF_NODUMP|UF_SYSTEM|UF_HIDDEN|UF_READONLY|UF_REPARSE|
- UF_OFFLINE|UF_SPARSE)) != 0)
- return (EOPNOTSUPP);
- /*
- * Unprivileged processes are not permitted to unset system
- * flags, or modify flags if any system flags are set.
- * Privileged non-jail processes may not modify system flags
- * if securelevel > 0 and any existing system flags are set.
- * Privileged jail processes behave like privileged non-jail
- * processes if the PR_ALLOW_CHFLAGS permission bit is set;
- * otherwise, they behave like unprivileged processes.
- */
- if (secpolicy_fs_owner(vp->v_mount, cred) == 0 ||
- spl_priv_check_cred(cred, PRIV_VFS_SYSFLAGS) == 0) {
- if (zflags &
- (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) {
- error = securelevel_gt(cred, 0);
- if (error != 0)
- return (error);
- }
- } else {
- /*
- * Callers may only modify the file flags on
- * objects they have VADMIN rights for.
- */
- if ((error = VOP_ACCESS(vp, VADMIN, cred,
- curthread)) != 0)
- return (error);
- if (zflags &
- (ZFS_IMMUTABLE | ZFS_APPENDONLY |
- ZFS_NOUNLINK)) {
- return (EPERM);
- }
- if (fflags &
- (SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK)) {
- return (EPERM);
- }
- }
-
-#define FLAG_CHANGE(fflag, zflag, xflag, xfield) do { \
- if (((fflags & (fflag)) && !(zflags & (zflag))) || \
- ((zflags & (zflag)) && !(fflags & (fflag)))) { \
- XVA_SET_REQ(&xvap, (xflag)); \
- (xfield) = ((fflags & (fflag)) != 0); \
- } \
-} while (0)
- /* Convert chflags into ZFS-type flags. */
- /* XXX: what about SF_SETTABLE?. */
- FLAG_CHANGE(SF_IMMUTABLE, ZFS_IMMUTABLE, XAT_IMMUTABLE,
- xvap.xva_xoptattrs.xoa_immutable);
- FLAG_CHANGE(SF_APPEND, ZFS_APPENDONLY, XAT_APPENDONLY,
- xvap.xva_xoptattrs.xoa_appendonly);
- FLAG_CHANGE(SF_NOUNLINK, ZFS_NOUNLINK, XAT_NOUNLINK,
- xvap.xva_xoptattrs.xoa_nounlink);
- FLAG_CHANGE(UF_ARCHIVE, ZFS_ARCHIVE, XAT_ARCHIVE,
- xvap.xva_xoptattrs.xoa_archive);
- FLAG_CHANGE(UF_NODUMP, ZFS_NODUMP, XAT_NODUMP,
- xvap.xva_xoptattrs.xoa_nodump);
- FLAG_CHANGE(UF_READONLY, ZFS_READONLY, XAT_READONLY,
- xvap.xva_xoptattrs.xoa_readonly);
- FLAG_CHANGE(UF_SYSTEM, ZFS_SYSTEM, XAT_SYSTEM,
- xvap.xva_xoptattrs.xoa_system);
- FLAG_CHANGE(UF_HIDDEN, ZFS_HIDDEN, XAT_HIDDEN,
- xvap.xva_xoptattrs.xoa_hidden);
- FLAG_CHANGE(UF_REPARSE, ZFS_REPARSE, XAT_REPARSE,
- xvap.xva_xoptattrs.xoa_reparse);
- FLAG_CHANGE(UF_OFFLINE, ZFS_OFFLINE, XAT_OFFLINE,
- xvap.xva_xoptattrs.xoa_offline);
- FLAG_CHANGE(UF_SPARSE, ZFS_SPARSE, XAT_SPARSE,
- xvap.xva_xoptattrs.xoa_sparse);
-#undef FLAG_CHANGE
- }
- if (vap->va_birthtime.tv_sec != VNOVAL) {
- xvap.xva_vattr.va_mask |= AT_XVATTR;
- XVA_SET_REQ(&xvap, XAT_CREATETIME);
- }
- return (zfs_setattr(VTOZ(vp), (vattr_t *)&xvap, 0, cred));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_rename_args {
- struct vnode *a_fdvp;
- struct vnode *a_fvp;
- struct componentname *a_fcnp;
- struct vnode *a_tdvp;
- struct vnode *a_tvp;
- struct componentname *a_tcnp;
-};
-#endif
-
-static int
-zfs_freebsd_rename(struct vop_rename_args *ap)
-{
- vnode_t *fdvp = ap->a_fdvp;
- vnode_t *fvp = ap->a_fvp;
- vnode_t *tdvp = ap->a_tdvp;
- vnode_t *tvp = ap->a_tvp;
- int error;
-
- ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART));
- ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART));
-
- error = zfs_rename_(fdvp, &fvp, ap->a_fcnp, tdvp, &tvp,
- ap->a_tcnp, ap->a_fcnp->cn_cred, 1);
-
- vrele(fdvp);
- vrele(fvp);
- vrele(tdvp);
- if (tvp != NULL)
- vrele(tvp);
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_symlink_args {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- char *a_target;
-};
-#endif
-
-static int
-zfs_freebsd_symlink(struct vop_symlink_args *ap)
-{
- struct componentname *cnp = ap->a_cnp;
- vattr_t *vap = ap->a_vap;
- znode_t *zp = NULL;
- int rc;
-
- ASSERT(cnp->cn_flags & SAVENAME);
-
- vap->va_type = VLNK; /* FreeBSD: Syscall only sets va_mode. */
- vattr_init_mask(vap);
- *ap->a_vpp = NULL;
-
- rc = zfs_symlink(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap,
- ap->a_target, &zp, cnp->cn_cred, 0 /* flags */);
- if (rc == 0)
- *ap->a_vpp = ZTOV(zp);
- return (rc);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_readlink_args {
- struct vnode *a_vp;
- struct uio *a_uio;
- struct ucred *a_cred;
-};
-#endif
-
-static int
-zfs_freebsd_readlink(struct vop_readlink_args *ap)
-{
-
- return (zfs_readlink(ap->a_vp, ap->a_uio, ap->a_cred, NULL));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_link_args {
- struct vnode *a_tdvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
-};
-#endif
-
-static int
-zfs_freebsd_link(struct vop_link_args *ap)
-{
- struct componentname *cnp = ap->a_cnp;
- vnode_t *vp = ap->a_vp;
- vnode_t *tdvp = ap->a_tdvp;
-
- if (tdvp->v_mount != vp->v_mount)
- return (EXDEV);
-
- ASSERT(cnp->cn_flags & SAVENAME);
-
- return (zfs_link(VTOZ(tdvp), VTOZ(vp),
- cnp->cn_nameptr, cnp->cn_cred, 0));
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_inactive_args {
- struct vnode *a_vp;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_inactive(struct vop_inactive_args *ap)
-{
- vnode_t *vp = ap->a_vp;
-
- zfs_inactive(vp, ap->a_td->td_ucred, NULL);
- return (0);
-}
-
-#if __FreeBSD_version >= 1300042
-#ifndef _SYS_SYSPROTO_H_
-struct vop_need_inactive_args {
- struct vnode *a_vp;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_need_inactive(struct vop_need_inactive_args *ap)
-{
- vnode_t *vp = ap->a_vp;
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
- int need;
-
- if (vn_need_pageq_flush(vp))
- return (1);
-
- if (!ZFS_TRYRLOCK_TEARDOWN_INACTIVE(zfsvfs))
- return (1);
- need = (zp->z_sa_hdl == NULL || zp->z_unlinked || zp->z_atime_dirty);
- ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
-
- return (need);
-}
-#endif
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_reclaim_args {
- struct vnode *a_vp;
- struct thread *a_td;
-};
-#endif
-
-static int
-zfs_freebsd_reclaim(struct vop_reclaim_args *ap)
-{
- vnode_t *vp = ap->a_vp;
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
-
- ASSERT(zp != NULL);
-
-#if __FreeBSD_version < 1300042
- /* Destroy the vm object and flush associated pages. */
- vnode_destroy_vobject(vp);
-#endif
- /*
- * z_teardown_inactive_lock protects from a race with
- * zfs_znode_dmu_fini in zfsvfs_teardown during
- * force unmount.
- */
- ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs);
- if (zp->z_sa_hdl == NULL)
- zfs_znode_free(zp);
- else
- zfs_zinactive(zp);
- ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
-
- vp->v_data = NULL;
- return (0);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_fid_args {
- struct vnode *a_vp;
- struct fid *a_fid;
-};
-#endif
-
-static int
-zfs_freebsd_fid(struct vop_fid_args *ap)
-{
-
- return (zfs_fid(ap->a_vp, (void *)ap->a_fid, NULL));
-}
-
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_pathconf_args {
- struct vnode *a_vp;
- int a_name;
- register_t *a_retval;
-} *ap;
-#endif
-
-static int
-zfs_freebsd_pathconf(struct vop_pathconf_args *ap)
-{
- ulong_t val;
- int error;
-
- error = zfs_pathconf(ap->a_vp, ap->a_name, &val,
- curthread->td_ucred, NULL);
- if (error == 0) {
- *ap->a_retval = val;
- return (error);
- }
- if (error != EOPNOTSUPP)
- return (error);
-
- switch (ap->a_name) {
- case _PC_NAME_MAX:
- *ap->a_retval = NAME_MAX;
- return (0);
- case _PC_PIPE_BUF:
- if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) {
- *ap->a_retval = PIPE_BUF;
- return (0);
- }
- return (EINVAL);
- default:
- return (vop_stdpathconf(ap));
- }
-}
-
-/*
- * FreeBSD's extended attributes namespace defines file name prefix for ZFS'
- * extended attribute name:
- *
- * NAMESPACE PREFIX
- * system freebsd:system:
- * user (none, can be used to access ZFS fsattr(5) attributes
- * created on Solaris)
- */
-static int
-zfs_create_attrname(int attrnamespace, const char *name, char *attrname,
- size_t size)
-{
- const char *namespace, *prefix, *suffix;
-
- /* We don't allow '/' character in attribute name. */
- if (strchr(name, '/') != NULL)
- return (EINVAL);
- /* We don't allow attribute names that start with "freebsd:" string. */
- if (strncmp(name, "freebsd:", 8) == 0)
- return (EINVAL);
-
- bzero(attrname, size);
-
- switch (attrnamespace) {
- case EXTATTR_NAMESPACE_USER:
-#if 0
- prefix = "freebsd:";
- namespace = EXTATTR_NAMESPACE_USER_STRING;
- suffix = ":";
-#else
- /*
- * This is the default namespace by which we can access all
- * attributes created on Solaris.
- */
- prefix = namespace = suffix = "";
-#endif
- break;
- case EXTATTR_NAMESPACE_SYSTEM:
- prefix = "freebsd:";
- namespace = EXTATTR_NAMESPACE_SYSTEM_STRING;
- suffix = ":";
- break;
- case EXTATTR_NAMESPACE_EMPTY:
- default:
- return (EINVAL);
- }
- if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix,
- name) >= size) {
- return (ENAMETOOLONG);
- }
- return (0);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_getextattr {
- IN struct vnode *a_vp;
- IN int a_attrnamespace;
- IN const char *a_name;
- INOUT struct uio *a_uio;
- OUT size_t *a_size;
- IN struct ucred *a_cred;
- IN struct thread *a_td;
-};
-#endif
-
-/*
- * Vnode operating to retrieve a named extended attribute.
- */
-static int
-zfs_getextattr(struct vop_getextattr_args *ap)
-{
- zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
- struct thread *td = ap->a_td;
- struct nameidata nd;
- char attrname[255];
- struct vattr va;
- vnode_t *xvp = NULL, *vp;
- int error, flags;
-
- /*
- * If the xattr property is off, refuse the request.
- */
- if (!(zfsvfs->z_flags & ZSB_XATTR)) {
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
- ap->a_cred, ap->a_td, VREAD);
- if (error != 0)
- return (error);
-
- error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
- sizeof (attrname));
- if (error != 0)
- return (error);
-
- ZFS_ENTER(zfsvfs);
-
- error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
- LOOKUP_XATTR, B_FALSE);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- flags = FREAD;
- NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
- xvp, td);
- error = vn_open_cred(&nd, &flags, 0, VN_OPEN_INVFS, ap->a_cred, NULL);
- vp = nd.ni_vp;
- NDFREE(&nd, NDF_ONLY_PNBUF);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- if (error == ENOENT)
- error = ENOATTR;
- return (error);
- }
-
- if (ap->a_size != NULL) {
- error = VOP_GETATTR(vp, &va, ap->a_cred);
- if (error == 0)
- *ap->a_size = (size_t)va.va_size;
- } else if (ap->a_uio != NULL)
- error = VOP_READ(vp, ap->a_uio, IO_UNIT, ap->a_cred);
-
- VOP_UNLOCK1(vp);
- vn_close(vp, flags, ap->a_cred, td);
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_deleteextattr {
- IN struct vnode *a_vp;
- IN int a_attrnamespace;
- IN const char *a_name;
- IN struct ucred *a_cred;
- IN struct thread *a_td;
-};
-#endif
-
-/*
- * Vnode operation to remove a named attribute.
- */
-static int
-zfs_deleteextattr(struct vop_deleteextattr_args *ap)
-{
- zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
- struct thread *td = ap->a_td;
- struct nameidata nd;
- char attrname[255];
- vnode_t *xvp = NULL, *vp;
- int error;
-
- /*
- * If the xattr property is off, refuse the request.
- */
- if (!(zfsvfs->z_flags & ZSB_XATTR)) {
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
- ap->a_cred, ap->a_td, VWRITE);
- if (error != 0)
- return (error);
-
- error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
- sizeof (attrname));
- if (error != 0)
- return (error);
-
- ZFS_ENTER(zfsvfs);
-
- error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
- LOOKUP_XATTR, B_FALSE);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF,
- UIO_SYSSPACE, attrname, xvp, td);
- error = namei(&nd);
- vp = nd.ni_vp;
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- NDFREE(&nd, NDF_ONLY_PNBUF);
- if (error == ENOENT)
- error = ENOATTR;
- return (error);
- }
-
- error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
- NDFREE(&nd, NDF_ONLY_PNBUF);
-
- vput(nd.ni_dvp);
- if (vp == nd.ni_dvp)
- vrele(vp);
- else
- vput(vp);
- ZFS_EXIT(zfsvfs);
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_setextattr {
- IN struct vnode *a_vp;
- IN int a_attrnamespace;
- IN const char *a_name;
- INOUT struct uio *a_uio;
- IN struct ucred *a_cred;
- IN struct thread *a_td;
-};
-#endif
-
-/*
- * Vnode operation to set a named attribute.
- */
-static int
-zfs_setextattr(struct vop_setextattr_args *ap)
-{
- zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
- struct thread *td = ap->a_td;
- struct nameidata nd;
- char attrname[255];
- struct vattr va;
- vnode_t *xvp = NULL, *vp;
- int error, flags;
-
- /*
- * If the xattr property is off, refuse the request.
- */
- if (!(zfsvfs->z_flags & ZSB_XATTR)) {
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
- ap->a_cred, ap->a_td, VWRITE);
- if (error != 0)
- return (error);
- error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
- sizeof (attrname));
- if (error != 0)
- return (error);
-
- ZFS_ENTER(zfsvfs);
-
- error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
- LOOKUP_XATTR | CREATE_XATTR_DIR, B_FALSE);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- flags = FFLAGS(O_WRONLY | O_CREAT);
- NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
- xvp, td);
- error = vn_open_cred(&nd, &flags, 0600, VN_OPEN_INVFS, ap->a_cred,
- NULL);
- vp = nd.ni_vp;
- NDFREE(&nd, NDF_ONLY_PNBUF);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- VATTR_NULL(&va);
- va.va_size = 0;
- error = VOP_SETATTR(vp, &va, ap->a_cred);
- if (error == 0)
- VOP_WRITE(vp, ap->a_uio, IO_UNIT, ap->a_cred);
-
- VOP_UNLOCK1(vp);
- vn_close(vp, flags, ap->a_cred, td);
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_listextattr {
- IN struct vnode *a_vp;
- IN int a_attrnamespace;
- INOUT struct uio *a_uio;
- OUT size_t *a_size;
- IN struct ucred *a_cred;
- IN struct thread *a_td;
-};
-#endif
-
-/*
- * Vnode operation to retrieve extended attributes on a vnode.
- */
-static int
-zfs_listextattr(struct vop_listextattr_args *ap)
-{
- zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
- struct thread *td = ap->a_td;
- struct nameidata nd;
- char attrprefix[16];
- uint8_t dirbuf[sizeof (struct dirent)];
- struct dirent *dp;
- struct iovec aiov;
- struct uio auio, *uio = ap->a_uio;
- size_t *sizep = ap->a_size;
- size_t plen;
- vnode_t *xvp = NULL, *vp;
- int done, error, eof, pos;
-
- /*
- * If the xattr property is off, refuse the request.
- */
- if (!(zfsvfs->z_flags & ZSB_XATTR)) {
- return (SET_ERROR(EOPNOTSUPP));
- }
-
- error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
- ap->a_cred, ap->a_td, VREAD);
- if (error != 0)
- return (error);
-
- error = zfs_create_attrname(ap->a_attrnamespace, "", attrprefix,
- sizeof (attrprefix));
- if (error != 0)
- return (error);
- plen = strlen(attrprefix);
-
- ZFS_ENTER(zfsvfs);
-
- if (sizep != NULL)
- *sizep = 0;
-
- error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
- LOOKUP_XATTR, B_FALSE);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- /*
- * ENOATTR means that the EA directory does not yet exist,
- * i.e. there are no extended attributes there.
- */
- if (error == ENOATTR)
- error = 0;
- return (error);
- }
-
- NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED,
- UIO_SYSSPACE, ".", xvp, td);
- error = namei(&nd);
- vp = nd.ni_vp;
- NDFREE(&nd, NDF_ONLY_PNBUF);
- if (error != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- auio.uio_iov = &aiov;
- auio.uio_iovcnt = 1;
- auio.uio_segflg = UIO_SYSSPACE;
- auio.uio_td = td;
- auio.uio_rw = UIO_READ;
- auio.uio_offset = 0;
-
- do {
- uint8_t nlen;
-
- aiov.iov_base = (void *)dirbuf;
- aiov.iov_len = sizeof (dirbuf);
- auio.uio_resid = sizeof (dirbuf);
- error = VOP_READDIR(vp, &auio, ap->a_cred, &eof, NULL, NULL);
- done = sizeof (dirbuf) - auio.uio_resid;
- if (error != 0)
- break;
- for (pos = 0; pos < done; ) {
- dp = (struct dirent *)(dirbuf + pos);
- pos += dp->d_reclen;
- /*
- * XXX: Temporarily we also accept DT_UNKNOWN, as this
- * is what we get when attribute was created on Solaris.
- */
- if (dp->d_type != DT_REG && dp->d_type != DT_UNKNOWN)
- continue;
- if (plen == 0 &&
- strncmp(dp->d_name, "freebsd:", 8) == 0)
- continue;
- else if (strncmp(dp->d_name, attrprefix, plen) != 0)
- continue;
- nlen = dp->d_namlen - plen;
- if (sizep != NULL)
- *sizep += 1 + nlen;
- else if (uio != NULL) {
- /*
- * Format of extattr name entry is one byte for
- * length and the rest for name.
- */
- error = uiomove(&nlen, 1, uio->uio_rw, uio);
- if (error == 0) {
- error = uiomove(dp->d_name + plen, nlen,
- uio->uio_rw, uio);
- }
- if (error != 0)
- break;
- }
- }
- } while (!eof && error == 0);
-
- vput(vp);
- ZFS_EXIT(zfsvfs);
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_getacl_args {
- struct vnode *vp;
- acl_type_t type;
- struct acl *aclp;
- struct ucred *cred;
- struct thread *td;
-};
-#endif
-
-static int
-zfs_freebsd_getacl(struct vop_getacl_args *ap)
-{
- int error;
- vsecattr_t vsecattr;
-
- if (ap->a_type != ACL_TYPE_NFS4)
- return (EINVAL);
-
- vsecattr.vsa_mask = VSA_ACE | VSA_ACECNT;
- if ((error = zfs_getsecattr(ap->a_vp, &vsecattr, 0, ap->a_cred, NULL)))
- return (error);
-
- error = acl_from_aces(ap->a_aclp, vsecattr.vsa_aclentp,
- vsecattr.vsa_aclcnt);
- if (vsecattr.vsa_aclentp != NULL)
- kmem_free(vsecattr.vsa_aclentp, vsecattr.vsa_aclentsz);
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_setacl_args {
- struct vnode *vp;
- acl_type_t type;
- struct acl *aclp;
- struct ucred *cred;
- struct thread *td;
-};
-#endif
-
-static int
-zfs_freebsd_setacl(struct vop_setacl_args *ap)
-{
- int error;
- vsecattr_t vsecattr;
- int aclbsize; /* size of acl list in bytes */
- aclent_t *aaclp;
-
- if (ap->a_type != ACL_TYPE_NFS4)
- return (EINVAL);
-
- if (ap->a_aclp == NULL)
- return (EINVAL);
-
- if (ap->a_aclp->acl_cnt < 1 || ap->a_aclp->acl_cnt > MAX_ACL_ENTRIES)
- return (EINVAL);
-
- /*
- * With NFSv4 ACLs, chmod(2) may need to add additional entries,
- * splitting every entry into two and appending "canonical six"
- * entries at the end. Don't allow for setting an ACL that would
- * cause chmod(2) to run out of ACL entries.
- */
- if (ap->a_aclp->acl_cnt * 2 + 6 > ACL_MAX_ENTRIES)
- return (ENOSPC);
-
- error = acl_nfs4_check(ap->a_aclp, ap->a_vp->v_type == VDIR);
- if (error != 0)
- return (error);
-
- vsecattr.vsa_mask = VSA_ACE;
- aclbsize = ap->a_aclp->acl_cnt * sizeof (ace_t);
- vsecattr.vsa_aclentp = kmem_alloc(aclbsize, KM_SLEEP);
- aaclp = vsecattr.vsa_aclentp;
- vsecattr.vsa_aclentsz = aclbsize;
-
- aces_from_acl(vsecattr.vsa_aclentp, &vsecattr.vsa_aclcnt, ap->a_aclp);
- error = zfs_setsecattr(VTOZ(ap->a_vp), &vsecattr, 0, ap->a_cred);
- kmem_free(aaclp, aclbsize);
-
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct vop_aclcheck_args {
- struct vnode *vp;
- acl_type_t type;
- struct acl *aclp;
- struct ucred *cred;
- struct thread *td;
-};
-#endif
-
-static int
-zfs_freebsd_aclcheck(struct vop_aclcheck_args *ap)
-{
-
- return (EOPNOTSUPP);
-}
-
-static int
-zfs_vptocnp(struct vop_vptocnp_args *ap)
-{
- vnode_t *covered_vp;
- vnode_t *vp = ap->a_vp;
- zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
- znode_t *zp = VTOZ(vp);
- int ltype;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /*
- * If we are a snapshot mounted under .zfs, run the operation
- * on the covered vnode.
- */
- if (zp->z_id != zfsvfs->z_root || zfsvfs->z_parent == zfsvfs) {
- char name[MAXNAMLEN + 1];
- znode_t *dzp;
- size_t len;
-
- error = zfs_znode_parent_and_name(zp, &dzp, name);
- if (error == 0) {
- len = strlen(name);
- if (*ap->a_buflen < len)
- error = SET_ERROR(ENOMEM);
- }
- if (error == 0) {
- *ap->a_buflen -= len;
- bcopy(name, ap->a_buf + *ap->a_buflen, len);
- *ap->a_vpp = ZTOV(dzp);
- }
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- ZFS_EXIT(zfsvfs);
-
- covered_vp = vp->v_mount->mnt_vnodecovered;
-#if __FreeBSD_version >= 1300045
- enum vgetstate vs = vget_prep(covered_vp);
-#else
- vhold(covered_vp);
-#endif
- ltype = VOP_ISLOCKED(vp);
- VOP_UNLOCK1(vp);
-#if __FreeBSD_version >= 1300045
- error = vget_finish(covered_vp, LK_SHARED, vs);
-#else
- error = vget(covered_vp, LK_SHARED | LK_VNHELD, curthread);
-#endif
- if (error == 0) {
- error = VOP_VPTOCNP(covered_vp, ap->a_vpp, ap->a_cred,
- ap->a_buf, ap->a_buflen);
- vput(covered_vp);
- }
- vn_lock(vp, ltype | LK_RETRY);
- if (VN_IS_DOOMED(vp))
- error = SET_ERROR(ENOENT);
- return (error);
-}
-
-#ifdef DIAGNOSTIC
-#ifndef _SYS_SYSPROTO_H_
-struct vop_lock1_args {
- struct vnode *a_vp;
- int a_flags;
- char *file;
- int line;
-};
-#endif
-
-static int
-zfs_lock(struct vop_lock1_args *ap)
-{
- vnode_t *vp;
- znode_t *zp;
- int err;
-
-#if __FreeBSD_version >= 1300064
- err = vop_lock(ap);
-#else
- err = vop_stdlock(ap);
-#endif
- if (err == 0 && (ap->a_flags & LK_NOWAIT) == 0) {
- vp = ap->a_vp;
- zp = vp->v_data;
- if (vp->v_mount != NULL && !VN_IS_DOOMED(vp) &&
- zp != NULL && (zp->z_pflags & ZFS_XATTR) == 0)
- VERIFY(!RRM_LOCK_HELD(&zp->z_zfsvfs->z_teardown_lock));
- }
- return (err);
-}
-#endif
-
-struct vop_vector zfs_vnodeops;
-struct vop_vector zfs_fifoops;
-struct vop_vector zfs_shareops;
-
-struct vop_vector zfs_vnodeops = {
- .vop_default = &default_vnodeops,
- .vop_inactive = zfs_freebsd_inactive,
-#if __FreeBSD_version >= 1300042
- .vop_need_inactive = zfs_freebsd_need_inactive,
-#endif
- .vop_reclaim = zfs_freebsd_reclaim,
-#if __FreeBSD_version >= 1300102
- .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec,
-#endif
- .vop_access = zfs_freebsd_access,
- .vop_allocate = VOP_EINVAL,
- .vop_lookup = zfs_cache_lookup,
- .vop_cachedlookup = zfs_freebsd_cachedlookup,
- .vop_getattr = zfs_freebsd_getattr,
- .vop_setattr = zfs_freebsd_setattr,
- .vop_create = zfs_freebsd_create,
- .vop_mknod = (vop_mknod_t *)zfs_freebsd_create,
- .vop_mkdir = zfs_freebsd_mkdir,
- .vop_readdir = zfs_freebsd_readdir,
- .vop_fsync = zfs_freebsd_fsync,
- .vop_open = zfs_freebsd_open,
- .vop_close = zfs_freebsd_close,
- .vop_rmdir = zfs_freebsd_rmdir,
- .vop_ioctl = zfs_freebsd_ioctl,
- .vop_link = zfs_freebsd_link,
- .vop_symlink = zfs_freebsd_symlink,
- .vop_readlink = zfs_freebsd_readlink,
- .vop_read = zfs_freebsd_read,
- .vop_write = zfs_freebsd_write,
- .vop_remove = zfs_freebsd_remove,
- .vop_rename = zfs_freebsd_rename,
- .vop_pathconf = zfs_freebsd_pathconf,
- .vop_bmap = zfs_freebsd_bmap,
- .vop_fid = zfs_freebsd_fid,
- .vop_getextattr = zfs_getextattr,
- .vop_deleteextattr = zfs_deleteextattr,
- .vop_setextattr = zfs_setextattr,
- .vop_listextattr = zfs_listextattr,
- .vop_getacl = zfs_freebsd_getacl,
- .vop_setacl = zfs_freebsd_setacl,
- .vop_aclcheck = zfs_freebsd_aclcheck,
- .vop_getpages = zfs_freebsd_getpages,
- .vop_putpages = zfs_freebsd_putpages,
- .vop_vptocnp = zfs_vptocnp,
-#if __FreeBSD_version >= 1300064
-#ifdef DIAGNOSTIC
- .vop_lock1 = zfs_lock,
-#else
- .vop_lock1 = vop_lock,
-#endif
- .vop_unlock = vop_unlock,
- .vop_islocked = vop_islocked,
-#else
-#ifdef DIAGNOSTIC
- .vop_lock1 = zfs_lock,
-#endif
-#endif
-};
-VFS_VOP_VECTOR_REGISTER(zfs_vnodeops);
-
-struct vop_vector zfs_fifoops = {
- .vop_default = &fifo_specops,
- .vop_fsync = zfs_freebsd_fsync,
-#if __FreeBSD_version >= 1300102
- .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec,
-#endif
- .vop_access = zfs_freebsd_access,
- .vop_getattr = zfs_freebsd_getattr,
- .vop_inactive = zfs_freebsd_inactive,
- .vop_read = VOP_PANIC,
- .vop_reclaim = zfs_freebsd_reclaim,
- .vop_setattr = zfs_freebsd_setattr,
- .vop_write = VOP_PANIC,
- .vop_pathconf = zfs_freebsd_pathconf,
- .vop_fid = zfs_freebsd_fid,
- .vop_getacl = zfs_freebsd_getacl,
- .vop_setacl = zfs_freebsd_setacl,
- .vop_aclcheck = zfs_freebsd_aclcheck,
-};
-VFS_VOP_VECTOR_REGISTER(zfs_fifoops);
-
-/*
- * special share hidden files vnode operations template
- */
-struct vop_vector zfs_shareops = {
- .vop_default = &default_vnodeops,
-#if __FreeBSD_version >= 1300121
- .vop_fplookup_vexec = VOP_EAGAIN,
-#endif
- .vop_access = zfs_freebsd_access,
- .vop_inactive = zfs_freebsd_inactive,
- .vop_reclaim = zfs_freebsd_reclaim,
- .vop_fid = zfs_freebsd_fid,
- .vop_pathconf = zfs_freebsd_pathconf,
-};
-VFS_VOP_VECTOR_REGISTER(zfs_shareops);
--- /dev/null
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
+ * Copyright (c) 2014 Integros [integros.com]
+ * Copyright 2017 Nexenta Systems, Inc.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/resource.h>
+#include <sys/vfs.h>
+#include <sys/endian.h>
+#include <sys/vm.h>
+#include <sys/vnode.h>
+#if __FreeBSD_version >= 1300102
+#include <sys/smr.h>
+#endif
+#include <sys/dirent.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/taskq.h>
+#include <sys/uio.h>
+#include <sys/atomic.h>
+#include <sys/namei.h>
+#include <sys/mman.h>
+#include <sys/cmn_err.h>
+#include <sys/kdb.h>
+#include <sys/sysproto.h>
+#include <sys/errno.h>
+#include <sys/unistd.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/fs/zfs.h>
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/dbuf.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include <sys/policy.h>
+#include <sys/sunddi.h>
+#include <sys/filio.h>
+#include <sys/sid.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_fuid.h>
+#include <sys/zfs_quota.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_rlock.h>
+#include <sys/extdirent.h>
+#include <sys/bio.h>
+#include <sys/buf.h>
+#include <sys/sched.h>
+#include <sys/acl.h>
+#include <sys/vmmeter.h>
+#include <vm/vm_param.h>
+#include <sys/zil.h>
+#include <sys/zfs_vnops.h>
+
+#include <vm/vm_object.h>
+
+#include <sys/extattr.h>
+#include <sys/priv.h>
+
+#ifndef VN_OPEN_INVFS
+#define VN_OPEN_INVFS 0x0
+#endif
+
+VFS_SMR_DECLARE;
+
+#if __FreeBSD_version >= 1300047
+#define vm_page_wire_lock(pp)
+#define vm_page_wire_unlock(pp)
+#else
+#define vm_page_wire_lock(pp) vm_page_lock(pp)
+#define vm_page_wire_unlock(pp) vm_page_unlock(pp)
+#endif
+
+#ifdef DEBUG_VFS_LOCKS
+#define VNCHECKREF(vp) \
+ VNASSERT((vp)->v_holdcnt > 0 && (vp)->v_usecount > 0, vp, \
+ ("%s: wrong ref counts", __func__));
+#else
+#define VNCHECKREF(vp)
+#endif
+
+/*
+ * Programming rules.
+ *
+ * Each vnode op performs some logical unit of work. To do this, the ZPL must
+ * properly lock its in-core state, create a DMU transaction, do the work,
+ * record this work in the intent log (ZIL), commit the DMU transaction,
+ * and wait for the intent log to commit if it is a synchronous operation.
+ * Moreover, the vnode ops must work in both normal and log replay context.
+ * The ordering of events is important to avoid deadlocks and references
+ * to freed memory. The example below illustrates the following Big Rules:
+ *
+ * (1) A check must be made in each zfs thread for a mounted file system.
+ * This is done avoiding races using ZFS_ENTER(zfsvfs).
+ * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
+ * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
+ * can return EIO from the calling function.
+ *
+ * (2) VN_RELE() should always be the last thing except for zil_commit()
+ * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
+ * First, if it's the last reference, the vnode/znode
+ * can be freed, so the zp may point to freed memory. Second, the last
+ * reference will call zfs_zinactive(), which may induce a lot of work --
+ * pushing cached pages (which acquires range locks) and syncing out
+ * cached atime changes. Third, zfs_zinactive() may require a new tx,
+ * which could deadlock the system if you were already holding one.
+ * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC().
+ *
+ * (3) All range locks must be grabbed before calling dmu_tx_assign(),
+ * as they can span dmu_tx_assign() calls.
+ *
+ * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to
+ * dmu_tx_assign(). This is critical because we don't want to block
+ * while holding locks.
+ *
+ * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This
+ * reduces lock contention and CPU usage when we must wait (note that if
+ * throughput is constrained by the storage, nearly every transaction
+ * must wait).
+ *
+ * Note, in particular, that if a lock is sometimes acquired before
+ * the tx assigns, and sometimes after (e.g. z_lock), then failing
+ * to use a non-blocking assign can deadlock the system. The scenario:
+ *
+ * Thread A has grabbed a lock before calling dmu_tx_assign().
+ * Thread B is in an already-assigned tx, and blocks for this lock.
+ * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
+ * forever, because the previous txg can't quiesce until B's tx commits.
+ *
+ * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
+ * then drop all locks, call dmu_tx_wait(), and try again. On subsequent
+ * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT,
+ * to indicate that this operation has already called dmu_tx_wait().
+ * This will ensure that we don't retry forever, waiting a short bit
+ * each time.
+ *
+ * (5) If the operation succeeded, generate the intent log entry for it
+ * before dropping locks. This ensures that the ordering of events
+ * in the intent log matches the order in which they actually occurred.
+ * During ZIL replay the zfs_log_* functions will update the sequence
+ * number to indicate the zil transaction has replayed.
+ *
+ * (6) At the end of each vnode op, the DMU tx must always commit,
+ * regardless of whether there were any errors.
+ *
+ * (7) After dropping all locks, invoke zil_commit(zilog, foid)
+ * to ensure that synchronous semantics are provided when necessary.
+ *
+ * In general, this is how things should be ordered in each vnode op:
+ *
+ * ZFS_ENTER(zfsvfs); // exit if unmounted
+ * top:
+ * zfs_dirent_lookup(&dl, ...) // lock directory entry (may VN_HOLD())
+ * rw_enter(...); // grab any other locks you need
+ * tx = dmu_tx_create(...); // get DMU tx
+ * dmu_tx_hold_*(); // hold each object you might modify
+ * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ * if (error) {
+ * rw_exit(...); // drop locks
+ * zfs_dirent_unlock(dl); // unlock directory entry
+ * VN_RELE(...); // release held vnodes
+ * if (error == ERESTART) {
+ * waited = B_TRUE;
+ * dmu_tx_wait(tx);
+ * dmu_tx_abort(tx);
+ * goto top;
+ * }
+ * dmu_tx_abort(tx); // abort DMU tx
+ * ZFS_EXIT(zfsvfs); // finished in zfs
+ * return (error); // really out of space
+ * }
+ * error = do_real_work(); // do whatever this VOP does
+ * if (error == 0)
+ * zfs_log_*(...); // on success, make ZIL entry
+ * dmu_tx_commit(tx); // commit DMU tx -- error or not
+ * rw_exit(...); // drop locks
+ * zfs_dirent_unlock(dl); // unlock directory entry
+ * VN_RELE(...); // release held vnodes
+ * zil_commit(zilog, foid); // synchronous when necessary
+ * ZFS_EXIT(zfsvfs); // finished in zfs
+ * return (error); // done, report error
+ */
+
+/* ARGSUSED */
+static int
+zfs_open(vnode_t **vpp, int flag, cred_t *cr)
+{
+ znode_t *zp = VTOZ(*vpp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) &&
+ ((flag & FAPPEND) == 0)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
+ ZTOV(zp)->v_type == VREG &&
+ !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) {
+ if (fs_vscan(*vpp, cr, 0) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EACCES));
+ }
+ }
+
+ /* Keep a count of the synchronous opens in the znode */
+ if (flag & (FSYNC | FDSYNC))
+ atomic_inc_32(&zp->z_sync_cnt);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/* ARGSUSED */
+static int
+zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ /* Decrement the synchronous opens in the znode */
+ if ((flag & (FSYNC | FDSYNC)) && (count == 1))
+ atomic_dec_32(&zp->z_sync_cnt);
+
+ if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
+ ZTOV(zp)->v_type == VREG &&
+ !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0)
+ VERIFY(fs_vscan(vp, cr, 1) == 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*
+ * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and
+ * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter.
+ */
+static int
+zfs_holey(vnode_t *vp, ulong_t cmd, offset_t *off)
+{
+ znode_t *zp = VTOZ(vp);
+ uint64_t noff = (uint64_t)*off; /* new offset */
+ uint64_t file_sz;
+ int error;
+ boolean_t hole;
+
+ file_sz = zp->z_size;
+ if (noff >= file_sz) {
+ return (SET_ERROR(ENXIO));
+ }
+
+ if (cmd == _FIO_SEEK_HOLE)
+ hole = B_TRUE;
+ else
+ hole = B_FALSE;
+
+ error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff);
+
+ if (error == ESRCH)
+ return (SET_ERROR(ENXIO));
+
+ /* file was dirty, so fall back to using generic logic */
+ if (error == EBUSY) {
+ if (hole)
+ *off = file_sz;
+
+ return (0);
+ }
+
+ /*
+ * We could find a hole that begins after the logical end-of-file,
+ * because dmu_offset_next() only works on whole blocks. If the
+ * EOF falls mid-block, then indicate that the "virtual hole"
+ * at the end of the file begins at the logical EOF, rather than
+ * at the end of the last block.
+ */
+ if (noff > file_sz) {
+ ASSERT(hole);
+ noff = file_sz;
+ }
+
+ if (noff < *off)
+ return (error);
+ *off = noff;
+ return (error);
+}
+
+/* ARGSUSED */
+static int
+zfs_ioctl(vnode_t *vp, ulong_t com, intptr_t data, int flag, cred_t *cred,
+ int *rvalp)
+{
+ offset_t off;
+ int error;
+ zfsvfs_t *zfsvfs;
+ znode_t *zp;
+
+ switch (com) {
+ case _FIOFFS:
+ {
+ return (0);
+
+ /*
+ * The following two ioctls are used by bfu. Faking out,
+ * necessary to avoid bfu errors.
+ */
+ }
+ case _FIOGDIO:
+ case _FIOSDIO:
+ {
+ return (0);
+ }
+
+ case _FIO_SEEK_DATA:
+ case _FIO_SEEK_HOLE:
+ {
+ off = *(offset_t *)data;
+ zp = VTOZ(vp);
+ zfsvfs = zp->z_zfsvfs;
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ /* offset parameter is in/out */
+ error = zfs_holey(vp, com, &off);
+ ZFS_EXIT(zfsvfs);
+ if (error)
+ return (error);
+ *(offset_t *)data = off;
+ return (0);
+ }
+ }
+ return (SET_ERROR(ENOTTY));
+}
+
+static vm_page_t
+page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes)
+{
+ vm_object_t obj;
+ vm_page_t pp;
+ int64_t end;
+
+ /*
+ * At present vm_page_clear_dirty extends the cleared range to DEV_BSIZE
+ * aligned boundaries, if the range is not aligned. As a result a
+ * DEV_BSIZE subrange with partially dirty data may get marked as clean.
+ * It may happen that all DEV_BSIZE subranges are marked clean and thus
+ * the whole page would be considered clean despite have some
+ * dirty data.
+ * For this reason we should shrink the range to DEV_BSIZE aligned
+ * boundaries before calling vm_page_clear_dirty.
+ */
+ end = rounddown2(off + nbytes, DEV_BSIZE);
+ off = roundup2(off, DEV_BSIZE);
+ nbytes = end - off;
+
+ obj = vp->v_object;
+ zfs_vmobject_assert_wlocked_12(obj);
+#if __FreeBSD_version < 1300050
+ for (;;) {
+ if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL &&
+ pp->valid) {
+ if (vm_page_xbusied(pp)) {
+ /*
+ * Reference the page before unlocking and
+ * sleeping so that the page daemon is less
+ * likely to reclaim it.
+ */
+ vm_page_reference(pp);
+ vm_page_lock(pp);
+ zfs_vmobject_wunlock(obj);
+ vm_page_busy_sleep(pp, "zfsmwb", true);
+ zfs_vmobject_wlock(obj);
+ continue;
+ }
+ vm_page_sbusy(pp);
+ } else if (pp != NULL) {
+ ASSERT(!pp->valid);
+ pp = NULL;
+ }
+ if (pp != NULL) {
+ ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
+ vm_object_pip_add(obj, 1);
+ pmap_remove_write(pp);
+ if (nbytes != 0)
+ vm_page_clear_dirty(pp, off, nbytes);
+ }
+ break;
+ }
+#else
+ vm_page_grab_valid_unlocked(&pp, obj, OFF_TO_IDX(start),
+ VM_ALLOC_NOCREAT | VM_ALLOC_SBUSY | VM_ALLOC_NORMAL |
+ VM_ALLOC_IGN_SBUSY);
+ if (pp != NULL) {
+ ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
+ vm_object_pip_add(obj, 1);
+ pmap_remove_write(pp);
+ if (nbytes != 0)
+ vm_page_clear_dirty(pp, off, nbytes);
+ }
+#endif
+ return (pp);
+}
+
+static void
+page_unbusy(vm_page_t pp)
+{
+
+ vm_page_sunbusy(pp);
+#if __FreeBSD_version >= 1300041
+ vm_object_pip_wakeup(pp->object);
+#else
+ vm_object_pip_subtract(pp->object, 1);
+#endif
+}
+
+#if __FreeBSD_version > 1300051
+static vm_page_t
+page_hold(vnode_t *vp, int64_t start)
+{
+ vm_object_t obj;
+ vm_page_t m;
+
+ obj = vp->v_object;
+ vm_page_grab_valid_unlocked(&m, obj, OFF_TO_IDX(start),
+ VM_ALLOC_NOCREAT | VM_ALLOC_WIRED | VM_ALLOC_IGN_SBUSY |
+ VM_ALLOC_NOBUSY);
+ return (m);
+}
+#else
+static vm_page_t
+page_hold(vnode_t *vp, int64_t start)
+{
+ vm_object_t obj;
+ vm_page_t pp;
+
+ obj = vp->v_object;
+ zfs_vmobject_assert_wlocked(obj);
+
+ for (;;) {
+ if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL &&
+ pp->valid) {
+ if (vm_page_xbusied(pp)) {
+ /*
+ * Reference the page before unlocking and
+ * sleeping so that the page daemon is less
+ * likely to reclaim it.
+ */
+ vm_page_reference(pp);
+ vm_page_lock(pp);
+ zfs_vmobject_wunlock(obj);
+ vm_page_busy_sleep(pp, "zfsmwb", true);
+ zfs_vmobject_wlock(obj);
+ continue;
+ }
+
+ ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
+ vm_page_wire_lock(pp);
+ vm_page_hold(pp);
+ vm_page_wire_unlock(pp);
+
+ } else
+ pp = NULL;
+ break;
+ }
+ return (pp);
+}
+#endif
+
+static void
+page_unhold(vm_page_t pp)
+{
+
+ vm_page_wire_lock(pp);
+#if __FreeBSD_version >= 1300035
+ vm_page_unwire(pp, PQ_ACTIVE);
+#else
+ vm_page_unhold(pp);
+#endif
+ vm_page_wire_unlock(pp);
+}
+
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages. What this means:
+ *
+ * On Write: If we find a memory mapped page, we write to *both*
+ * the page and the dmu buffer.
+ */
+void
+update_pages(znode_t *zp, int64_t start, int len, objset_t *os, uint64_t oid)
+{
+ vm_object_t obj;
+ struct sf_buf *sf;
+ vnode_t *vp = ZTOV(zp);
+ caddr_t va;
+ int off;
+
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(obj != NULL);
+
+ off = start & PAGEOFFSET;
+ zfs_vmobject_wlock_12(obj);
+#if __FreeBSD_version >= 1300041
+ vm_object_pip_add(obj, 1);
+#endif
+ for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
+ vm_page_t pp;
+ int nbytes = imin(PAGESIZE - off, len);
+
+ if ((pp = page_busy(vp, start, off, nbytes)) != NULL) {
+ zfs_vmobject_wunlock_12(obj);
+
+ va = zfs_map_page(pp, &sf);
+ (void) dmu_read(os, oid, start+off, nbytes,
+ va+off, DMU_READ_PREFETCH);
+ zfs_unmap_page(sf);
+
+ zfs_vmobject_wlock_12(obj);
+ page_unbusy(pp);
+ }
+ len -= nbytes;
+ off = 0;
+ }
+#if __FreeBSD_version >= 1300041
+ vm_object_pip_wakeup(obj);
+#else
+ vm_object_pip_wakeupn(obj, 0);
+#endif
+ zfs_vmobject_wunlock_12(obj);
+}
+
+/*
+ * Read with UIO_NOCOPY flag means that sendfile(2) requests
+ * ZFS to populate a range of page cache pages with data.
+ *
+ * NOTE: this function could be optimized to pre-allocate
+ * all pages in advance, drain exclusive busy on all of them,
+ * map them into contiguous KVA region and populate them
+ * in one single dmu_read() call.
+ */
+int
+mappedread_sf(znode_t *zp, int nbytes, uio_t *uio)
+{
+ vnode_t *vp = ZTOV(zp);
+ objset_t *os = zp->z_zfsvfs->z_os;
+ struct sf_buf *sf;
+ vm_object_t obj;
+ vm_page_t pp;
+ int64_t start;
+ caddr_t va;
+ int len = nbytes;
+ int error = 0;
+
+ ASSERT(uio->uio_segflg == UIO_NOCOPY);
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(obj != NULL);
+ ASSERT((uio->uio_loffset & PAGEOFFSET) == 0);
+
+ zfs_vmobject_wlock_12(obj);
+ for (start = uio->uio_loffset; len > 0; start += PAGESIZE) {
+ int bytes = MIN(PAGESIZE, len);
+
+ pp = vm_page_grab_unlocked(obj, OFF_TO_IDX(start),
+ VM_ALLOC_SBUSY | VM_ALLOC_NORMAL | VM_ALLOC_IGN_SBUSY);
+ if (vm_page_none_valid(pp)) {
+ zfs_vmobject_wunlock_12(obj);
+ va = zfs_map_page(pp, &sf);
+ error = dmu_read(os, zp->z_id, start, bytes, va,
+ DMU_READ_PREFETCH);
+ if (bytes != PAGESIZE && error == 0)
+ bzero(va + bytes, PAGESIZE - bytes);
+ zfs_unmap_page(sf);
+ zfs_vmobject_wlock_12(obj);
+#if __FreeBSD_version >= 1300081
+ if (error == 0) {
+ vm_page_valid(pp);
+ vm_page_activate(pp);
+ vm_page_do_sunbusy(pp);
+ } else {
+ zfs_vmobject_wlock(obj);
+ if (!vm_page_wired(pp) && pp->valid == 0 &&
+ vm_page_busy_tryupgrade(pp))
+ vm_page_free(pp);
+ else
+ vm_page_sunbusy(pp);
+ zfs_vmobject_wunlock(obj);
+ }
+#else
+ vm_page_do_sunbusy(pp);
+ vm_page_lock(pp);
+ if (error) {
+ if (pp->wire_count == 0 && pp->valid == 0 &&
+ !vm_page_busied(pp))
+ vm_page_free(pp);
+ } else {
+ pp->valid = VM_PAGE_BITS_ALL;
+ vm_page_activate(pp);
+ }
+ vm_page_unlock(pp);
+#endif
+ } else {
+ ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
+ vm_page_do_sunbusy(pp);
+ }
+ if (error)
+ break;
+ uio->uio_resid -= bytes;
+ uio->uio_offset += bytes;
+ len -= bytes;
+ }
+ zfs_vmobject_wunlock_12(obj);
+ return (error);
+}
+
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages. What this means:
+ *
+ * On Read: We "read" preferentially from memory mapped pages,
+ * else we default from the dmu buffer.
+ *
+ * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
+ * the file is memory mapped.
+ */
+int
+mappedread(znode_t *zp, int nbytes, uio_t *uio)
+{
+ vnode_t *vp = ZTOV(zp);
+ vm_object_t obj;
+ int64_t start;
+ int len = nbytes;
+ int off;
+ int error = 0;
+
+ ASSERT(vp->v_mount != NULL);
+ obj = vp->v_object;
+ ASSERT(obj != NULL);
+
+ start = uio->uio_loffset;
+ off = start & PAGEOFFSET;
+ zfs_vmobject_wlock_12(obj);
+ for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
+ vm_page_t pp;
+ uint64_t bytes = MIN(PAGESIZE - off, len);
+
+ if ((pp = page_hold(vp, start))) {
+ struct sf_buf *sf;
+ caddr_t va;
+
+ zfs_vmobject_wunlock_12(obj);
+ va = zfs_map_page(pp, &sf);
+ error = vn_io_fault_uiomove(va + off, bytes, uio);
+ zfs_unmap_page(sf);
+ zfs_vmobject_wlock_12(obj);
+ page_unhold(pp);
+ } else {
+ zfs_vmobject_wunlock_12(obj);
+ error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+ uio, bytes);
+ zfs_vmobject_wlock_12(obj);
+ }
+ len -= bytes;
+ off = 0;
+ if (error)
+ break;
+ }
+ zfs_vmobject_wunlock_12(obj);
+ return (error);
+}
+
+int
+zfs_write_simple(znode_t *zp, const void *data, size_t len,
+ loff_t pos, size_t *presid)
+{
+ int error = 0;
+ ssize_t resid;
+
+ error = vn_rdwr(UIO_WRITE, ZTOV(zp), __DECONST(void *, data), len, pos,
+ UIO_SYSSPACE, IO_SYNC, kcred, NOCRED, &resid, curthread);
+
+ if (error) {
+ return (SET_ERROR(error));
+ } else if (presid == NULL) {
+ if (resid != 0) {
+ error = SET_ERROR(EIO);
+ }
+ } else {
+ *presid = resid;
+ }
+ return (error);
+}
+
+static void
+zfs_get_done(zgd_t *zgd, int error)
+{
+ znode_t *zp = zgd->zgd_private;
+ objset_t *os = zp->z_zfsvfs->z_os;
+
+ if (zgd->zgd_db)
+ dmu_buf_rele(zgd->zgd_db, zgd);
+
+ zfs_rangelock_exit(zgd->zgd_lr);
+
+ /*
+ * Release the vnode asynchronously as we currently have the
+ * txg stopped from syncing.
+ */
+ VN_RELE_ASYNC(ZTOV(zp), dsl_pool_zrele_taskq(dmu_objset_pool(os)));
+
+ kmem_free(zgd, sizeof (zgd_t));
+}
+
+#ifdef ZFS_DEBUG
+static int zil_fault_io = 0;
+#endif
+
+/*
+ * Get data to generate a TX_WRITE intent log record.
+ */
+int
+zfs_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb, zio_t *zio)
+{
+ zfsvfs_t *zfsvfs = arg;
+ objset_t *os = zfsvfs->z_os;
+ znode_t *zp;
+ uint64_t object = lr->lr_foid;
+ uint64_t offset = lr->lr_offset;
+ uint64_t size = lr->lr_length;
+ dmu_buf_t *db;
+ zgd_t *zgd;
+ int error = 0;
+
+ ASSERT3P(lwb, !=, NULL);
+ ASSERT3P(zio, !=, NULL);
+ ASSERT3U(size, !=, 0);
+
+ /*
+ * Nothing to do if the file has been removed
+ */
+ if (zfs_zget(zfsvfs, object, &zp) != 0)
+ return (SET_ERROR(ENOENT));
+ if (zp->z_unlinked) {
+ /*
+ * Release the vnode asynchronously as we currently have the
+ * txg stopped from syncing.
+ */
+ VN_RELE_ASYNC(ZTOV(zp),
+ dsl_pool_zrele_taskq(dmu_objset_pool(os)));
+ return (SET_ERROR(ENOENT));
+ }
+
+ zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
+ zgd->zgd_lwb = lwb;
+ zgd->zgd_private = zp;
+
+ /*
+ * Write records come in two flavors: immediate and indirect.
+ * For small writes it's cheaper to store the data with the
+ * log record (immediate); for large writes it's cheaper to
+ * sync the data and get a pointer to it (indirect) so that
+ * we don't have to write the data twice.
+ */
+ if (buf != NULL) { /* immediate write */
+ zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock, offset,
+ size, RL_READER);
+ /* test for truncation needs to be done while range locked */
+ if (offset >= zp->z_size) {
+ error = SET_ERROR(ENOENT);
+ } else {
+ error = dmu_read(os, object, offset, size, buf,
+ DMU_READ_NO_PREFETCH);
+ }
+ ASSERT(error == 0 || error == ENOENT);
+ } else { /* indirect write */
+ /*
+ * Have to lock the whole block to ensure when it's
+ * written out and its checksum is being calculated
+ * that no one can change the data. We need to re-check
+ * blocksize after we get the lock in case it's changed!
+ */
+ for (;;) {
+ uint64_t blkoff;
+ size = zp->z_blksz;
+ blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
+ offset -= blkoff;
+ zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
+ offset, size, RL_READER);
+ if (zp->z_blksz == size)
+ break;
+ offset += blkoff;
+ zfs_rangelock_exit(zgd->zgd_lr);
+ }
+ /* test for truncation needs to be done while range locked */
+ if (lr->lr_offset >= zp->z_size)
+ error = SET_ERROR(ENOENT);
+#ifdef ZFS_DEBUG
+ if (zil_fault_io) {
+ error = SET_ERROR(EIO);
+ zil_fault_io = 0;
+ }
+#endif
+ if (error == 0)
+ error = dmu_buf_hold(os, object, offset, zgd, &db,
+ DMU_READ_NO_PREFETCH);
+
+ if (error == 0) {
+ blkptr_t *bp = &lr->lr_blkptr;
+
+ zgd->zgd_db = db;
+ zgd->zgd_bp = bp;
+
+ ASSERT(db->db_offset == offset);
+ ASSERT(db->db_size == size);
+
+ error = dmu_sync(zio, lr->lr_common.lrc_txg,
+ zfs_get_done, zgd);
+ ASSERT(error || lr->lr_length <= size);
+
+ /*
+ * On success, we need to wait for the write I/O
+ * initiated by dmu_sync() to complete before we can
+ * release this dbuf. We will finish everything up
+ * in the zfs_get_done() callback.
+ */
+ if (error == 0)
+ return (0);
+
+ if (error == EALREADY) {
+ lr->lr_common.lrc_txtype = TX_WRITE2;
+ /*
+ * TX_WRITE2 relies on the data previously
+ * written by the TX_WRITE that caused
+ * EALREADY. We zero out the BP because
+ * it is the old, currently-on-disk BP,
+ * so there's no need to zio_flush() its
+ * vdevs (flushing would needlesly hurt
+ * performance, and doesn't work on
+ * indirect vdevs).
+ */
+ zgd->zgd_bp = NULL;
+ BP_ZERO(bp);
+ error = 0;
+ }
+ }
+ }
+
+ zfs_get_done(zgd, error);
+
+ return (error);
+}
+
+/*ARGSUSED*/
+static int
+zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr,
+ caller_context_t *ct)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (flag & V_ACE_MASK)
+ error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
+ else
+ error = zfs_zaccess_rwx(zp, mode, flag, cr);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+static int
+zfs_dd_callback(struct mount *mp, void *arg, int lkflags, struct vnode **vpp)
+{
+ int error;
+
+ *vpp = arg;
+ error = vn_lock(*vpp, lkflags);
+ if (error != 0)
+ vrele(*vpp);
+ return (error);
+}
+
+static int
+zfs_lookup_lock(vnode_t *dvp, vnode_t *vp, const char *name, int lkflags)
+{
+ znode_t *zdp = VTOZ(dvp);
+ zfsvfs_t *zfsvfs __unused = zdp->z_zfsvfs;
+ int error;
+ int ltype;
+
+ if (zfsvfs->z_replay == B_FALSE)
+ ASSERT_VOP_LOCKED(dvp, __func__);
+#ifdef DIAGNOSTIC
+ if ((zdp->z_pflags & ZFS_XATTR) == 0)
+ VERIFY(!RRM_LOCK_HELD(&zfsvfs->z_teardown_lock));
+#endif
+
+ if (name[0] == 0 || (name[0] == '.' && name[1] == 0)) {
+ ASSERT3P(dvp, ==, vp);
+ vref(dvp);
+ ltype = lkflags & LK_TYPE_MASK;
+ if (ltype != VOP_ISLOCKED(dvp)) {
+ if (ltype == LK_EXCLUSIVE)
+ vn_lock(dvp, LK_UPGRADE | LK_RETRY);
+ else /* if (ltype == LK_SHARED) */
+ vn_lock(dvp, LK_DOWNGRADE | LK_RETRY);
+
+ /*
+ * Relock for the "." case could leave us with
+ * reclaimed vnode.
+ */
+ if (VN_IS_DOOMED(dvp)) {
+ vrele(dvp);
+ return (SET_ERROR(ENOENT));
+ }
+ }
+ return (0);
+ } else if (name[0] == '.' && name[1] == '.' && name[2] == 0) {
+ /*
+ * Note that in this case, dvp is the child vnode, and we
+ * are looking up the parent vnode - exactly reverse from
+ * normal operation. Unlocking dvp requires some rather
+ * tricky unlock/relock dance to prevent mp from being freed;
+ * use vn_vget_ino_gen() which takes care of all that.
+ *
+ * XXX Note that there is a time window when both vnodes are
+ * unlocked. It is possible, although highly unlikely, that
+ * during that window the parent-child relationship between
+ * the vnodes may change, for example, get reversed.
+ * In that case we would have a wrong lock order for the vnodes.
+ * All other filesystems seem to ignore this problem, so we
+ * do the same here.
+ * A potential solution could be implemented as follows:
+ * - using LK_NOWAIT when locking the second vnode and retrying
+ * if necessary
+ * - checking that the parent-child relationship still holds
+ * after locking both vnodes and retrying if it doesn't
+ */
+ error = vn_vget_ino_gen(dvp, zfs_dd_callback, vp, lkflags, &vp);
+ return (error);
+ } else {
+ error = vn_lock(vp, lkflags);
+ if (error != 0)
+ vrele(vp);
+ return (error);
+ }
+}
+
+/*
+ * Lookup an entry in a directory, or an extended attribute directory.
+ * If it exists, return a held vnode reference for it.
+ *
+ * IN: dvp - vnode of directory to search.
+ * nm - name of entry to lookup.
+ * pnp - full pathname to lookup [UNUSED].
+ * flags - LOOKUP_XATTR set if looking for an attribute.
+ * rdir - root directory vnode [UNUSED].
+ * cr - credentials of caller.
+ * ct - caller context
+ *
+ * OUT: vpp - vnode of located entry, NULL if not found.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * NA
+ */
+/* ARGSUSED */
+static int
+zfs_lookup(vnode_t *dvp, const char *nm, vnode_t **vpp,
+ struct componentname *cnp, int nameiop, cred_t *cr, kthread_t *td,
+ int flags, boolean_t cached)
+{
+ znode_t *zdp = VTOZ(dvp);
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = zdp->z_zfsvfs;
+ int error = 0;
+
+ /*
+ * Fast path lookup, however we must skip DNLC lookup
+ * for case folding or normalizing lookups because the
+ * DNLC code only stores the passed in name. This means
+ * creating 'a' and removing 'A' on a case insensitive
+ * file system would work, but DNLC still thinks 'a'
+ * exists and won't let you create it again on the next
+ * pass through fast path.
+ */
+ if (!(flags & LOOKUP_XATTR)) {
+ if (dvp->v_type != VDIR) {
+ return (SET_ERROR(ENOTDIR));
+ } else if (zdp->z_sa_hdl == NULL) {
+ return (SET_ERROR(EIO));
+ }
+ }
+
+ DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp,
+ const char *, nm);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zdp);
+
+ *vpp = NULL;
+
+ if (flags & LOOKUP_XATTR) {
+ /*
+ * If the xattr property is off, refuse the lookup request.
+ */
+ if (!(zfsvfs->z_flags & ZSB_XATTR)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ /*
+ * We don't allow recursive attributes..
+ * Maybe someday we will.
+ */
+ if (zdp->z_pflags & ZFS_XATTR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if ((error = zfs_get_xattrdir(VTOZ(dvp), &zp, cr, flags))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ *vpp = ZTOV(zp);
+
+ /*
+ * Do we have permission to get into attribute directory?
+ */
+ error = zfs_zaccess(zp, ACE_EXECUTE, 0, B_FALSE, cr);
+ if (error) {
+ vrele(ZTOV(zp));
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Check accessibility of directory if we're not coming in via
+ * VOP_CACHEDLOOKUP.
+ */
+ if (!cached) {
+#ifdef NOEXECCHECK
+ if ((cnp->cn_flags & NOEXECCHECK) != 0) {
+ cnp->cn_flags &= ~NOEXECCHECK;
+ } else
+#endif
+ if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+
+ /*
+ * First handle the special cases.
+ */
+ if ((cnp->cn_flags & ISDOTDOT) != 0) {
+ /*
+ * If we are a snapshot mounted under .zfs, return
+ * the vp for the snapshot directory.
+ */
+ if (zdp->z_id == zfsvfs->z_root && zfsvfs->z_parent != zfsvfs) {
+ struct componentname cn;
+ vnode_t *zfsctl_vp;
+ int ltype;
+
+ ZFS_EXIT(zfsvfs);
+ ltype = VOP_ISLOCKED(dvp);
+ VOP_UNLOCK1(dvp);
+ error = zfsctl_root(zfsvfs->z_parent, LK_SHARED,
+ &zfsctl_vp);
+ if (error == 0) {
+ cn.cn_nameptr = "snapshot";
+ cn.cn_namelen = strlen(cn.cn_nameptr);
+ cn.cn_nameiop = cnp->cn_nameiop;
+ cn.cn_flags = cnp->cn_flags & ~ISDOTDOT;
+ cn.cn_lkflags = cnp->cn_lkflags;
+ error = VOP_LOOKUP(zfsctl_vp, vpp, &cn);
+ vput(zfsctl_vp);
+ }
+ vn_lock(dvp, ltype | LK_RETRY);
+ return (error);
+ }
+ }
+ if (zfs_has_ctldir(zdp) && strcmp(nm, ZFS_CTLDIR_NAME) == 0) {
+ ZFS_EXIT(zfsvfs);
+ if ((cnp->cn_flags & ISLASTCN) != 0 && nameiop != LOOKUP)
+ return (SET_ERROR(ENOTSUP));
+ error = zfsctl_root(zfsvfs, cnp->cn_lkflags, vpp);
+ return (error);
+ }
+
+ /*
+ * The loop is retry the lookup if the parent-child relationship
+ * changes during the dot-dot locking complexities.
+ */
+ for (;;) {
+ uint64_t parent;
+
+ error = zfs_dirlook(zdp, nm, &zp);
+ if (error == 0)
+ *vpp = ZTOV(zp);
+
+ ZFS_EXIT(zfsvfs);
+ if (error != 0)
+ break;
+
+ error = zfs_lookup_lock(dvp, *vpp, nm, cnp->cn_lkflags);
+ if (error != 0) {
+ /*
+ * If we've got a locking error, then the vnode
+ * got reclaimed because of a force unmount.
+ * We never enter doomed vnodes into the name cache.
+ */
+ *vpp = NULL;
+ return (error);
+ }
+
+ if ((cnp->cn_flags & ISDOTDOT) == 0)
+ break;
+
+ ZFS_ENTER(zfsvfs);
+ if (zdp->z_sa_hdl == NULL) {
+ error = SET_ERROR(EIO);
+ } else {
+ error = sa_lookup(zdp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+ &parent, sizeof (parent));
+ }
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ vput(ZTOV(zp));
+ break;
+ }
+ if (zp->z_id == parent) {
+ ZFS_EXIT(zfsvfs);
+ break;
+ }
+ vput(ZTOV(zp));
+ }
+
+ if (error != 0)
+ *vpp = NULL;
+
+ /* Translate errors and add SAVENAME when needed. */
+ if (cnp->cn_flags & ISLASTCN) {
+ switch (nameiop) {
+ case CREATE:
+ case RENAME:
+ if (error == ENOENT) {
+ error = EJUSTRETURN;
+ cnp->cn_flags |= SAVENAME;
+ break;
+ }
+ /* FALLTHROUGH */
+ case DELETE:
+ if (error == 0)
+ cnp->cn_flags |= SAVENAME;
+ break;
+ }
+ }
+
+ /* Insert name into cache (as non-existent) if appropriate. */
+ if (zfsvfs->z_use_namecache && !zfsvfs->z_replay &&
+ error == ENOENT && (cnp->cn_flags & MAKEENTRY) != 0)
+ cache_enter(dvp, NULL, cnp);
+
+ /* Insert name into cache if appropriate. */
+ if (zfsvfs->z_use_namecache && !zfsvfs->z_replay &&
+ error == 0 && (cnp->cn_flags & MAKEENTRY)) {
+ if (!(cnp->cn_flags & ISLASTCN) ||
+ (nameiop != DELETE && nameiop != RENAME)) {
+ cache_enter(dvp, *vpp, cnp);
+ }
+ }
+
+ return (error);
+}
+
+/*
+ * Attempt to create a new entry in a directory. If the entry
+ * already exists, truncate the file if permissible, else return
+ * an error. Return the vp of the created or trunc'd file.
+ *
+ * IN: dvp - vnode of directory to put new file entry in.
+ * name - name of new file entry.
+ * vap - attributes of new file.
+ * excl - flag indicating exclusive or non-exclusive mode.
+ * mode - mode to open file with.
+ * cr - credentials of caller.
+ * flag - large file flag [UNUSED].
+ * ct - caller context
+ * vsecp - ACL to be set
+ *
+ * OUT: vpp - vnode of created or trunc'd entry.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dvp - ctime|mtime updated if new entry created
+ * vp - ctime|mtime always, atime if new
+ */
+
+/* ARGSUSED */
+int
+zfs_create(znode_t *dzp, const char *name, vattr_t *vap, int excl, int mode,
+ znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ zilog_t *zilog;
+ objset_t *os;
+ dmu_tx_t *tx;
+ int error;
+ ksid_t *ksid;
+ uid_t uid;
+ gid_t gid = crgetgid(cr);
+ uint64_t projid = ZFS_DEFAULT_PROJID;
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+ uint64_t txtype;
+#ifdef DEBUG_VFS_LOCKS
+ vnode_t *dvp = ZTOV(dzp);
+#endif
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ ksid = crgetsid(cr, KSID_OWNER);
+ if (ksid)
+ uid = ksid_getid(ksid);
+ else
+ uid = crgetuid(cr);
+
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (vsecp || (vap->va_mask & AT_XVATTR) ||
+ IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ os = zfsvfs->z_os;
+ zilog = zfsvfs->z_log;
+
+ if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ if (vap->va_mask & AT_XVATTR) {
+ if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap,
+ crgetuid(cr), cr, vap->va_type)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ *zpp = NULL;
+
+ if ((vap->va_mode & S_ISVTX) && secpolicy_vnode_stky_modify(cr))
+ vap->va_mode &= ~S_ISVTX;
+
+ error = zfs_dirent_lookup(dzp, name, &zp, ZNEW);
+ if (error) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ ASSERT3P(zp, ==, NULL);
+
+ /*
+ * Create a new file object and update the directory
+ * to reference it.
+ */
+ if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ goto out;
+ }
+
+ /*
+ * We only support the creation of regular files in
+ * extended attribute directories.
+ */
+
+ if ((dzp->z_pflags & ZFS_XATTR) &&
+ (vap->va_type != VREG)) {
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+
+ if ((error = zfs_acl_ids_create(dzp, 0, vap,
+ cr, vsecp, &acl_ids)) != 0)
+ goto out;
+
+ if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
+ projid = zfs_inherit_projid(dzp);
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
+ zfs_acl_ids_free(&acl_ids);
+ error = SET_ERROR(EDQUOT);
+ goto out;
+ }
+
+ getnewvnode_reserve_();
+
+ tx = dmu_tx_create(os);
+
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE);
+
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+ dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+ if (!zfsvfs->z_use_sa &&
+ acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, acl_ids.z_aclp->z_acl_bytes);
+ }
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ getnewvnode_drop_reserve();
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ (void) zfs_link_create(dzp, name, zp, tx, ZNEW);
+ txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
+ zfs_log_create(zilog, tx, txtype, dzp, zp, name,
+ vsecp, acl_ids.z_fuidp, vap);
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_commit(tx);
+
+ getnewvnode_drop_reserve();
+
+out:
+ VNCHECKREF(dvp);
+ if (error == 0) {
+ *zpp = zp;
+ }
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Remove an entry from a directory.
+ *
+ * IN: dvp - vnode of directory to remove entry from.
+ * name - name of entry to remove.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dvp - ctime|mtime
+ * vp - ctime (if nlink > 0)
+ */
+
+/*ARGSUSED*/
+static int
+zfs_remove_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr)
+{
+ znode_t *dzp = VTOZ(dvp);
+ znode_t *zp;
+ znode_t *xzp;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ zilog_t *zilog;
+ uint64_t xattr_obj;
+ uint64_t obj = 0;
+ dmu_tx_t *tx;
+ boolean_t unlinked;
+ uint64_t txtype;
+ int error;
+
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zp = VTOZ(vp);
+ ZFS_VERIFY_ZP(zp);
+ zilog = zfsvfs->z_log;
+
+ xattr_obj = 0;
+ xzp = NULL;
+
+ if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
+ goto out;
+ }
+
+ /*
+ * Need to use rmdir for removing directories.
+ */
+ if (vp->v_type == VDIR) {
+ error = SET_ERROR(EPERM);
+ goto out;
+ }
+
+ vnevent_remove(vp, dvp, name, ct);
+
+ obj = zp->z_id;
+
+ /* are there any extended attributes? */
+ error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+ &xattr_obj, sizeof (xattr_obj));
+ if (error == 0 && xattr_obj) {
+ error = zfs_zget(zfsvfs, xattr_obj, &xzp);
+ ASSERT0(error);
+ }
+
+ /*
+ * We may delete the znode now, or we may put it in the unlinked set;
+ * it depends on whether we're the last link, and on whether there are
+ * other holds on the vnode. So we dmu_tx_hold() the right things to
+ * allow for either case.
+ */
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ zfs_sa_upgrade_txholds(tx, dzp);
+
+ if (xzp) {
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
+ }
+
+ /* charge as an update -- would be nice not to charge at all */
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+
+ /*
+ * Mark this transaction as typically resulting in a net free of space
+ */
+ dmu_tx_mark_netfree(tx);
+
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Remove the directory entry.
+ */
+ error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, &unlinked);
+
+ if (error) {
+ dmu_tx_commit(tx);
+ goto out;
+ }
+
+ if (unlinked) {
+ zfs_unlinked_add(zp, tx);
+ vp->v_vflag |= VV_NOSYNC;
+ }
+ /* XXX check changes to linux vnops */
+ txtype = TX_REMOVE;
+ zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked);
+
+ dmu_tx_commit(tx);
+out:
+
+ if (xzp)
+ vrele(ZTOV(xzp));
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+
+static int
+zfs_lookup_internal(znode_t *dzp, const char *name, vnode_t **vpp,
+ struct componentname *cnp, int nameiop)
+{
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ int error;
+
+ cnp->cn_nameptr = __DECONST(char *, name);
+ cnp->cn_namelen = strlen(name);
+ cnp->cn_nameiop = nameiop;
+ cnp->cn_flags = ISLASTCN | SAVENAME;
+ cnp->cn_lkflags = LK_EXCLUSIVE | LK_RETRY;
+ cnp->cn_cred = kcred;
+ cnp->cn_thread = curthread;
+
+ if (zfsvfs->z_use_namecache && !zfsvfs->z_replay) {
+ struct vop_lookup_args a;
+
+ a.a_gen.a_desc = &vop_lookup_desc;
+ a.a_dvp = ZTOV(dzp);
+ a.a_vpp = vpp;
+ a.a_cnp = cnp;
+ error = vfs_cache_lookup(&a);
+ } else {
+ error = zfs_lookup(ZTOV(dzp), name, vpp, cnp, nameiop, kcred,
+ curthread, 0, B_FALSE);
+ }
+#ifdef ZFS_DEBUG
+ if (error) {
+ printf("got error %d on name %s on op %d\n", error, name,
+ nameiop);
+ kdb_backtrace();
+ }
+#endif
+ return (error);
+}
+
+int
+zfs_remove(znode_t *dzp, const char *name, cred_t *cr, int flags)
+{
+ vnode_t *vp;
+ int error;
+ struct componentname cn;
+
+ if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE)))
+ return (error);
+
+ error = zfs_remove_(ZTOV(dzp), vp, name, cr);
+ vput(vp);
+ return (error);
+}
+/*
+ * Create a new directory and insert it into dvp using the name
+ * provided. Return a pointer to the inserted directory.
+ *
+ * IN: dvp - vnode of directory to add subdir to.
+ * dirname - name of new directory.
+ * vap - attributes of new directory.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ * vsecp - ACL to be set
+ *
+ * OUT: vpp - vnode of created directory.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dvp - ctime|mtime updated
+ * vp - ctime|mtime|atime updated
+ */
+/*ARGSUSED*/
+int
+zfs_mkdir(znode_t *dzp, const char *dirname, vattr_t *vap, znode_t **zpp,
+ cred_t *cr, int flags, vsecattr_t *vsecp)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ zilog_t *zilog;
+ uint64_t txtype;
+ dmu_tx_t *tx;
+ int error;
+ ksid_t *ksid;
+ uid_t uid;
+ gid_t gid = crgetgid(cr);
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+
+ ASSERT(vap->va_type == VDIR);
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ ksid = crgetsid(cr, KSID_OWNER);
+ if (ksid)
+ uid = ksid_getid(ksid);
+ else
+ uid = crgetuid(cr);
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ ((vap->va_mask & AT_XVATTR) ||
+ IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (dzp->z_pflags & ZFS_XATTR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(dirname,
+ strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ if (vap->va_mask & AT_XVATTR) {
+ if ((error = secpolicy_xvattr(ZTOV(dzp), (xvattr_t *)vap,
+ crgetuid(cr), cr, vap->va_type)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ if ((error = zfs_acl_ids_create(dzp, 0, vap, cr,
+ NULL, &acl_ids)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * First make sure the new directory doesn't exist.
+ *
+ * Existence is checked first to make sure we don't return
+ * EACCES instead of EEXIST which can cause some applications
+ * to fail.
+ */
+ *zpp = NULL;
+
+ if ((error = zfs_dirent_lookup(dzp, dirname, &zp, ZNEW))) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ ASSERT3P(zp, ==, NULL);
+
+ if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr))) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EDQUOT));
+ }
+
+ /*
+ * Add a new entry to the directory.
+ */
+ getnewvnode_reserve_();
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
+ dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+ acl_ids.z_aclp->z_acl_bytes);
+ }
+
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE);
+
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ getnewvnode_drop_reserve();
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Create new node.
+ */
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ /*
+ * Now put new name in parent dir.
+ */
+ (void) zfs_link_create(dzp, dirname, zp, tx, ZNEW);
+
+ *zpp = zp;
+
+ txtype = zfs_log_create_txtype(Z_DIR, NULL, vap);
+ zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, NULL,
+ acl_ids.z_fuidp, vap);
+
+ zfs_acl_ids_free(&acl_ids);
+
+ dmu_tx_commit(tx);
+
+ getnewvnode_drop_reserve();
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*
+ * Remove a directory subdir entry. If the current working
+ * directory is the same as the subdir to be removed, the
+ * remove will fail.
+ *
+ * IN: dvp - vnode of directory to remove from.
+ * name - name of directory to be removed.
+ * cwd - vnode of current working directory.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_rmdir_(vnode_t *dvp, vnode_t *vp, const char *name, cred_t *cr)
+{
+ znode_t *dzp = VTOZ(dvp);
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ zilog_t *zilog;
+ dmu_tx_t *tx;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ ZFS_VERIFY_ZP(zp);
+ zilog = zfsvfs->z_log;
+
+
+ if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
+ goto out;
+ }
+
+ if (vp->v_type != VDIR) {
+ error = SET_ERROR(ENOTDIR);
+ goto out;
+ }
+
+ vnevent_rmdir(vp, dvp, name, ct);
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+ zfs_sa_upgrade_txholds(tx, zp);
+ zfs_sa_upgrade_txholds(tx, dzp);
+ dmu_tx_mark_netfree(tx);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ cache_purge(dvp);
+
+ error = zfs_link_destroy(dzp, name, zp, tx, ZEXISTS, NULL);
+
+ if (error == 0) {
+ uint64_t txtype = TX_RMDIR;
+ zfs_log_remove(zilog, tx, txtype, dzp, name,
+ ZFS_NO_OBJECT, B_FALSE);
+ }
+
+ dmu_tx_commit(tx);
+
+ cache_purge(vp);
+out:
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+int
+zfs_rmdir(znode_t *dzp, const char *name, znode_t *cwd, cred_t *cr, int flags)
+{
+ struct componentname cn;
+ vnode_t *vp;
+ int error;
+
+ if ((error = zfs_lookup_internal(dzp, name, &vp, &cn, DELETE)))
+ return (error);
+
+ error = zfs_rmdir_(ZTOV(dzp), vp, name, cr);
+ vput(vp);
+ return (error);
+}
+
+/*
+ * Read as many directory entries as will fit into the provided
+ * buffer from the given directory cursor position (specified in
+ * the uio structure).
+ *
+ * IN: vp - vnode of directory to read.
+ * uio - structure supplying read location, range info,
+ * and return buffer.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * OUT: uio - updated offset and range, buffer filled.
+ * eofp - set to true if end-of-file detected.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * vp - atime updated
+ *
+ * Note that the low 4 bits of the cookie returned by zap is always zero.
+ * This allows us to use the low range for "special" directory entries:
+ * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
+ * we use the offset 2 for the '.zfs' directory.
+ */
+/* ARGSUSED */
+static int
+zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
+ int *ncookies, ulong_t **cookies)
+{
+ znode_t *zp = VTOZ(vp);
+ iovec_t *iovp;
+ edirent_t *eodp;
+ dirent64_t *odp;
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ objset_t *os;
+ caddr_t outbuf;
+ size_t bufsize;
+ zap_cursor_t zc;
+ zap_attribute_t zap;
+ uint_t bytes_wanted;
+ uint64_t offset; /* must be unsigned; checks for < 1 */
+ uint64_t parent;
+ int local_eof;
+ int outcount;
+ int error;
+ uint8_t prefetch;
+ boolean_t check_sysattrs;
+ uint8_t type;
+ int ncooks;
+ ulong_t *cooks = NULL;
+ int flags = 0;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+ &parent, sizeof (parent))) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * If we are not given an eof variable,
+ * use a local one.
+ */
+ if (eofp == NULL)
+ eofp = &local_eof;
+
+ /*
+ * Check for valid iov_len.
+ */
+ if (uio->uio_iov->iov_len <= 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Quit if directory has been removed (posix)
+ */
+ if ((*eofp = zp->z_unlinked) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+ error = 0;
+ os = zfsvfs->z_os;
+ offset = uio->uio_loffset;
+ prefetch = zp->z_zn_prefetch;
+
+ /*
+ * Initialize the iterator cursor.
+ */
+ if (offset <= 3) {
+ /*
+ * Start iteration from the beginning of the directory.
+ */
+ zap_cursor_init(&zc, os, zp->z_id);
+ } else {
+ /*
+ * The offset is a serialized cursor.
+ */
+ zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
+ }
+
+ /*
+ * Get space to change directory entries into fs independent format.
+ */
+ iovp = uio->uio_iov;
+ bytes_wanted = iovp->iov_len;
+ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) {
+ bufsize = bytes_wanted;
+ outbuf = kmem_alloc(bufsize, KM_SLEEP);
+ odp = (struct dirent64 *)outbuf;
+ } else {
+ bufsize = bytes_wanted;
+ outbuf = NULL;
+ odp = (struct dirent64 *)iovp->iov_base;
+ }
+ eodp = (struct edirent *)odp;
+
+ if (ncookies != NULL) {
+ /*
+ * Minimum entry size is dirent size and 1 byte for a file name.
+ */
+ ncooks = uio->uio_resid / (sizeof (struct dirent) -
+ sizeof (((struct dirent *)NULL)->d_name) + 1);
+ cooks = malloc(ncooks * sizeof (ulong_t), M_TEMP, M_WAITOK);
+ *cookies = cooks;
+ *ncookies = ncooks;
+ }
+ /*
+ * If this VFS supports the system attribute view interface; and
+ * we're looking at an extended attribute directory; and we care
+ * about normalization conflicts on this vfs; then we must check
+ * for normalization conflicts with the sysattr name space.
+ */
+#ifdef TODO
+ check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
+ (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm &&
+ (flags & V_RDDIR_ENTFLAGS);
+#else
+ check_sysattrs = 0;
+#endif
+
+ /*
+ * Transform to file-system independent format
+ */
+ outcount = 0;
+ while (outcount < bytes_wanted) {
+ ino64_t objnum;
+ ushort_t reclen;
+ off64_t *next = NULL;
+
+ /*
+ * Special case `.', `..', and `.zfs'.
+ */
+ if (offset == 0) {
+ (void) strcpy(zap.za_name, ".");
+ zap.za_normalization_conflict = 0;
+ objnum = zp->z_id;
+ type = DT_DIR;
+ } else if (offset == 1) {
+ (void) strcpy(zap.za_name, "..");
+ zap.za_normalization_conflict = 0;
+ objnum = parent;
+ type = DT_DIR;
+ } else if (offset == 2 && zfs_show_ctldir(zp)) {
+ (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
+ zap.za_normalization_conflict = 0;
+ objnum = ZFSCTL_INO_ROOT;
+ type = DT_DIR;
+ } else {
+ /*
+ * Grab next entry.
+ */
+ if ((error = zap_cursor_retrieve(&zc, &zap))) {
+ if ((*eofp = (error == ENOENT)) != 0)
+ break;
+ else
+ goto update;
+ }
+
+ if (zap.za_integer_length != 8 ||
+ zap.za_num_integers != 1) {
+ cmn_err(CE_WARN, "zap_readdir: bad directory "
+ "entry, obj = %lld, offset = %lld\n",
+ (u_longlong_t)zp->z_id,
+ (u_longlong_t)offset);
+ error = SET_ERROR(ENXIO);
+ goto update;
+ }
+
+ objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
+ /*
+ * MacOS X can extract the object type here such as:
+ * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer);
+ */
+ type = ZFS_DIRENT_TYPE(zap.za_first_integer);
+
+ if (check_sysattrs && !zap.za_normalization_conflict) {
+#ifdef TODO
+ zap.za_normalization_conflict =
+ xattr_sysattr_casechk(zap.za_name);
+#else
+ panic("%s:%u: TODO", __func__, __LINE__);
+#endif
+ }
+ }
+
+ if (flags & V_RDDIR_ACCFILTER) {
+ /*
+ * If we have no access at all, don't include
+ * this entry in the returned information
+ */
+ znode_t *ezp;
+ if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0)
+ goto skip_entry;
+ if (!zfs_has_access(ezp, cr)) {
+ vrele(ZTOV(ezp));
+ goto skip_entry;
+ }
+ vrele(ZTOV(ezp));
+ }
+
+ if (flags & V_RDDIR_ENTFLAGS)
+ reclen = EDIRENT_RECLEN(strlen(zap.za_name));
+ else
+ reclen = DIRENT64_RECLEN(strlen(zap.za_name));
+
+ /*
+ * Will this entry fit in the buffer?
+ */
+ if (outcount + reclen > bufsize) {
+ /*
+ * Did we manage to fit anything in the buffer?
+ */
+ if (!outcount) {
+ error = SET_ERROR(EINVAL);
+ goto update;
+ }
+ break;
+ }
+ if (flags & V_RDDIR_ENTFLAGS) {
+ /*
+ * Add extended flag entry:
+ */
+ eodp->ed_ino = objnum;
+ eodp->ed_reclen = reclen;
+ /* NOTE: ed_off is the offset for the *next* entry */
+ next = &(eodp->ed_off);
+ eodp->ed_eflags = zap.za_normalization_conflict ?
+ ED_CASE_CONFLICT : 0;
+ (void) strncpy(eodp->ed_name, zap.za_name,
+ EDIRENT_NAMELEN(reclen));
+ eodp = (edirent_t *)((intptr_t)eodp + reclen);
+ } else {
+ /*
+ * Add normal entry:
+ */
+ odp->d_ino = objnum;
+ odp->d_reclen = reclen;
+ odp->d_namlen = strlen(zap.za_name);
+ /* NOTE: d_off is the offset for the *next* entry. */
+ next = &odp->d_off;
+ strlcpy(odp->d_name, zap.za_name, odp->d_namlen + 1);
+ odp->d_type = type;
+ dirent_terminate(odp);
+ odp = (dirent64_t *)((intptr_t)odp + reclen);
+ }
+ outcount += reclen;
+
+ ASSERT(outcount <= bufsize);
+
+ /* Prefetch znode */
+ if (prefetch)
+ dmu_prefetch(os, objnum, 0, 0, 0,
+ ZIO_PRIORITY_SYNC_READ);
+
+ skip_entry:
+ /*
+ * Move to the next entry, fill in the previous offset.
+ */
+ if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
+ zap_cursor_advance(&zc);
+ offset = zap_cursor_serialize(&zc);
+ } else {
+ offset += 1;
+ }
+
+ /* Fill the offset right after advancing the cursor. */
+ if (next != NULL)
+ *next = offset;
+ if (cooks != NULL) {
+ *cooks++ = offset;
+ ncooks--;
+ KASSERT(ncooks >= 0, ("ncookies=%d", ncooks));
+ }
+ }
+ zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
+
+ /* Subtract unused cookies */
+ if (ncookies != NULL)
+ *ncookies -= ncooks;
+
+ if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) {
+ iovp->iov_base += outcount;
+ iovp->iov_len -= outcount;
+ uio->uio_resid -= outcount;
+ } else if ((error = uiomove(outbuf, (long)outcount, UIO_READ, uio))) {
+ /*
+ * Reset the pointer.
+ */
+ offset = uio->uio_loffset;
+ }
+
+update:
+ zap_cursor_fini(&zc);
+ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
+ kmem_free(outbuf, bufsize);
+
+ if (error == ENOENT)
+ error = 0;
+
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+
+ uio->uio_loffset = offset;
+ ZFS_EXIT(zfsvfs);
+ if (error != 0 && cookies != NULL) {
+ free(*cookies, M_TEMP);
+ *cookies = NULL;
+ *ncookies = 0;
+ }
+ return (error);
+}
+
+/*
+ * Get the requested file attributes and place them in the provided
+ * vattr structure.
+ *
+ * IN: vp - vnode of file.
+ * vap - va_mask identifies requested attributes.
+ * If AT_XVATTR set, then optional attrs are requested
+ * flags - ATTR_NOACLCHECK (CIFS server context)
+ * cr - credentials of caller.
+ *
+ * OUT: vap - attribute values.
+ *
+ * RETURN: 0 (always succeeds).
+ */
+/* ARGSUSED */
+static int
+zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int error = 0;
+ uint32_t blksize;
+ u_longlong_t nblocks;
+ uint64_t mtime[2], ctime[2], crtime[2], rdev;
+ xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
+ xoptattr_t *xoap = NULL;
+ boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+ sa_bulk_attr_t bulk[4];
+ int count = 0;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid);
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16);
+ if (vp->v_type == VBLK || vp->v_type == VCHR)
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
+ &rdev, 8);
+
+ if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
+ * Also, if we are the owner don't bother, since owner should
+ * always be allowed to read basic attributes of file.
+ */
+ if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) &&
+ (vap->va_uid != crgetuid(cr))) {
+ if ((error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0,
+ skipaclchk, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ /*
+ * Return all attributes. It's cheaper to provide the answer
+ * than to determine whether we were asked the question.
+ */
+
+ vap->va_type = IFTOVT(zp->z_mode);
+ vap->va_mode = zp->z_mode & ~S_IFMT;
+ vn_fsid(vp, vap);
+ vap->va_nodeid = zp->z_id;
+ vap->va_nlink = zp->z_links;
+ if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp) &&
+ zp->z_links < ZFS_LINK_MAX)
+ vap->va_nlink++;
+ vap->va_size = zp->z_size;
+ if (vp->v_type == VBLK || vp->v_type == VCHR)
+ vap->va_rdev = zfs_cmpldev(rdev);
+ vap->va_seq = zp->z_seq;
+ vap->va_flags = 0; /* FreeBSD: Reset chflags(2) flags. */
+ vap->va_filerev = zp->z_seq;
+
+ /*
+ * Add in any requested optional attributes and the create time.
+ * Also set the corresponding bits in the returned attribute bitmap.
+ */
+ if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) {
+ if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
+ xoap->xoa_archive =
+ ((zp->z_pflags & ZFS_ARCHIVE) != 0);
+ XVA_SET_RTN(xvap, XAT_ARCHIVE);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
+ xoap->xoa_readonly =
+ ((zp->z_pflags & ZFS_READONLY) != 0);
+ XVA_SET_RTN(xvap, XAT_READONLY);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
+ xoap->xoa_system =
+ ((zp->z_pflags & ZFS_SYSTEM) != 0);
+ XVA_SET_RTN(xvap, XAT_SYSTEM);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
+ xoap->xoa_hidden =
+ ((zp->z_pflags & ZFS_HIDDEN) != 0);
+ XVA_SET_RTN(xvap, XAT_HIDDEN);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+ xoap->xoa_nounlink =
+ ((zp->z_pflags & ZFS_NOUNLINK) != 0);
+ XVA_SET_RTN(xvap, XAT_NOUNLINK);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+ xoap->xoa_immutable =
+ ((zp->z_pflags & ZFS_IMMUTABLE) != 0);
+ XVA_SET_RTN(xvap, XAT_IMMUTABLE);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+ xoap->xoa_appendonly =
+ ((zp->z_pflags & ZFS_APPENDONLY) != 0);
+ XVA_SET_RTN(xvap, XAT_APPENDONLY);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+ xoap->xoa_nodump =
+ ((zp->z_pflags & ZFS_NODUMP) != 0);
+ XVA_SET_RTN(xvap, XAT_NODUMP);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
+ xoap->xoa_opaque =
+ ((zp->z_pflags & ZFS_OPAQUE) != 0);
+ XVA_SET_RTN(xvap, XAT_OPAQUE);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+ xoap->xoa_av_quarantined =
+ ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0);
+ XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+ xoap->xoa_av_modified =
+ ((zp->z_pflags & ZFS_AV_MODIFIED) != 0);
+ XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) &&
+ vp->v_type == VREG) {
+ zfs_sa_get_scanstamp(zp, xvap);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+ xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0);
+ XVA_SET_RTN(xvap, XAT_REPARSE);
+ }
+ if (XVA_ISSET_REQ(xvap, XAT_GEN)) {
+ xoap->xoa_generation = zp->z_gen;
+ XVA_SET_RTN(xvap, XAT_GEN);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) {
+ xoap->xoa_offline =
+ ((zp->z_pflags & ZFS_OFFLINE) != 0);
+ XVA_SET_RTN(xvap, XAT_OFFLINE);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) {
+ xoap->xoa_sparse =
+ ((zp->z_pflags & ZFS_SPARSE) != 0);
+ XVA_SET_RTN(xvap, XAT_SPARSE);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
+ xoap->xoa_projinherit =
+ ((zp->z_pflags & ZFS_PROJINHERIT) != 0);
+ XVA_SET_RTN(xvap, XAT_PROJINHERIT);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
+ xoap->xoa_projid = zp->z_projid;
+ XVA_SET_RTN(xvap, XAT_PROJID);
+ }
+ }
+
+ ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime);
+ ZFS_TIME_DECODE(&vap->va_mtime, mtime);
+ ZFS_TIME_DECODE(&vap->va_ctime, ctime);
+ ZFS_TIME_DECODE(&vap->va_birthtime, crtime);
+
+
+ sa_object_size(zp->z_sa_hdl, &blksize, &nblocks);
+ vap->va_blksize = blksize;
+ vap->va_bytes = nblocks << 9; /* nblocks * 512 */
+
+ if (zp->z_blksz == 0) {
+ /*
+ * Block size hasn't been set; suggest maximal I/O transfers.
+ */
+ vap->va_blksize = zfsvfs->z_max_blksz;
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*
+ * Set the file attributes to the values contained in the
+ * vattr structure.
+ *
+ * IN: zp - znode of file to be modified.
+ * vap - new attribute values.
+ * If AT_XVATTR set, then optional attrs are being set
+ * flags - ATTR_UTIME set if non-default time values provided.
+ * - ATTR_NOACLCHECK (CIFS context only).
+ * cr - credentials of caller.
+ * ct - caller context
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * vp - ctime updated, mtime updated if size changed.
+ */
+/* ARGSUSED */
+int
+zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr)
+{
+ vnode_t *vp = ZTOV(zp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ objset_t *os = zfsvfs->z_os;
+ zilog_t *zilog;
+ dmu_tx_t *tx;
+ vattr_t oldva;
+ xvattr_t tmpxvattr;
+ uint_t mask = vap->va_mask;
+ uint_t saved_mask = 0;
+ uint64_t saved_mode;
+ int trim_mask = 0;
+ uint64_t new_mode;
+ uint64_t new_uid, new_gid;
+ uint64_t xattr_obj;
+ uint64_t mtime[2], ctime[2];
+ uint64_t projid = ZFS_INVALID_PROJID;
+ znode_t *attrzp;
+ int need_policy = FALSE;
+ int err, err2;
+ zfs_fuid_info_t *fuidp = NULL;
+ xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
+ xoptattr_t *xoap;
+ zfs_acl_t *aclp;
+ boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+ boolean_t fuid_dirtied = B_FALSE;
+ sa_bulk_attr_t bulk[7], xattr_bulk[7];
+ int count = 0, xattr_count = 0;
+
+ if (mask == 0)
+ return (0);
+
+ if (mask & AT_NOSET)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ zilog = zfsvfs->z_log;
+
+ /*
+ * Make sure that if we have ephemeral uid/gid or xvattr specified
+ * that file system is at proper version level
+ */
+
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) ||
+ ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) ||
+ (mask & AT_XVATTR))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (mask & AT_SIZE && vp->v_type == VDIR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EISDIR));
+ }
+
+ if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * If this is an xvattr_t, then get a pointer to the structure of
+ * optional attributes. If this is NULL, then we have a vattr_t.
+ */
+ xoap = xva_getxoptattr(xvap);
+
+ xva_init(&tmpxvattr);
+
+ /*
+ * Immutable files can only alter immutable bit and atime
+ */
+ if ((zp->z_pflags & ZFS_IMMUTABLE) &&
+ ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) ||
+ ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ /*
+ * Note: ZFS_READONLY is handled in zfs_zaccess_common.
+ */
+
+ /*
+ * Verify timestamps doesn't overflow 32 bits.
+ * ZFS can handle large timestamps, but 32bit syscalls can't
+ * handle times greater than 2039. This check should be removed
+ * once large timestamps are fully supported.
+ */
+ if (mask & (AT_ATIME | AT_MTIME)) {
+ if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) ||
+ ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EOVERFLOW));
+ }
+ }
+ if (xoap != NULL && (mask & AT_XVATTR)) {
+ if (XVA_ISSET_REQ(xvap, XAT_CREATETIME) &&
+ TIMESPEC_OVERFLOW(&vap->va_birthtime)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EOVERFLOW));
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
+ if (!dmu_objset_projectquota_enabled(os) ||
+ (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ projid = xoap->xoa_projid;
+ if (unlikely(projid == ZFS_INVALID_PROJID)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID)
+ projid = ZFS_INVALID_PROJID;
+ else
+ need_policy = TRUE;
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) &&
+ (xoap->xoa_projinherit !=
+ ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) &&
+ (!dmu_objset_projectquota_enabled(os) ||
+ (!S_ISREG(zp->z_mode) && !S_ISDIR(zp->z_mode)))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+ }
+
+ attrzp = NULL;
+ aclp = NULL;
+
+ if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EROFS));
+ }
+
+ /*
+ * First validate permissions
+ */
+
+ if (mask & AT_SIZE) {
+ /*
+ * XXX - Note, we are not providing any open
+ * mode flags here (like FNDELAY), so we may
+ * block if there are locks present... this
+ * should be addressed in openat().
+ */
+ /* XXX - would it be OK to generate a log record here? */
+ err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
+ if (err) {
+ ZFS_EXIT(zfsvfs);
+ return (err);
+ }
+ }
+
+ if (mask & (AT_ATIME|AT_MTIME) ||
+ ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
+ XVA_ISSET_REQ(xvap, XAT_READONLY) ||
+ XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
+ XVA_ISSET_REQ(xvap, XAT_OFFLINE) ||
+ XVA_ISSET_REQ(xvap, XAT_SPARSE) ||
+ XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
+ XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) {
+ need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
+ skipaclchk, cr);
+ }
+
+ if (mask & (AT_UID|AT_GID)) {
+ int idmask = (mask & (AT_UID|AT_GID));
+ int take_owner;
+ int take_group;
+
+ /*
+ * NOTE: even if a new mode is being set,
+ * we may clear S_ISUID/S_ISGID bits.
+ */
+
+ if (!(mask & AT_MODE))
+ vap->va_mode = zp->z_mode;
+
+ /*
+ * Take ownership or chgrp to group we are a member of
+ */
+
+ take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr));
+ take_group = (mask & AT_GID) &&
+ zfs_groupmember(zfsvfs, vap->va_gid, cr);
+
+ /*
+ * If both AT_UID and AT_GID are set then take_owner and
+ * take_group must both be set in order to allow taking
+ * ownership.
+ *
+ * Otherwise, send the check through secpolicy_vnode_setattr()
+ *
+ */
+
+ if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) ||
+ ((idmask == AT_UID) && take_owner) ||
+ ((idmask == AT_GID) && take_group)) {
+ if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
+ skipaclchk, cr) == 0) {
+ /*
+ * Remove setuid/setgid for non-privileged users
+ */
+ secpolicy_setid_clear(vap, vp, cr);
+ trim_mask = (mask & (AT_UID|AT_GID));
+ } else {
+ need_policy = TRUE;
+ }
+ } else {
+ need_policy = TRUE;
+ }
+ }
+
+ oldva.va_mode = zp->z_mode;
+ zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
+ if (mask & AT_XVATTR) {
+ /*
+ * Update xvattr mask to include only those attributes
+ * that are actually changing.
+ *
+ * the bits will be restored prior to actually setting
+ * the attributes so the caller thinks they were set.
+ */
+ if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+ if (xoap->xoa_appendonly !=
+ ((zp->z_pflags & ZFS_APPENDONLY) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_APPENDONLY);
+ XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
+ if (xoap->xoa_projinherit !=
+ ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_PROJINHERIT);
+ XVA_SET_REQ(&tmpxvattr, XAT_PROJINHERIT);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+ if (xoap->xoa_nounlink !=
+ ((zp->z_pflags & ZFS_NOUNLINK) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_NOUNLINK);
+ XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+ if (xoap->xoa_immutable !=
+ ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
+ XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+ if (xoap->xoa_nodump !=
+ ((zp->z_pflags & ZFS_NODUMP) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_NODUMP);
+ XVA_SET_REQ(&tmpxvattr, XAT_NODUMP);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+ if (xoap->xoa_av_modified !=
+ ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
+ XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+ if ((vp->v_type != VREG &&
+ xoap->xoa_av_quarantined) ||
+ xoap->xoa_av_quarantined !=
+ ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
+ XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if (need_policy == FALSE &&
+ (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
+ XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
+ need_policy = TRUE;
+ }
+ }
+
+ if (mask & AT_MODE) {
+ if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
+ err = secpolicy_setid_setsticky_clear(vp, vap,
+ &oldva, cr);
+ if (err) {
+ ZFS_EXIT(zfsvfs);
+ return (err);
+ }
+ trim_mask |= AT_MODE;
+ } else {
+ need_policy = TRUE;
+ }
+ }
+
+ if (need_policy) {
+ /*
+ * If trim_mask is set then take ownership
+ * has been granted or write_acl is present and user
+ * has the ability to modify mode. In that case remove
+ * UID|GID and or MODE from mask so that
+ * secpolicy_vnode_setattr() doesn't revoke it.
+ */
+
+ if (trim_mask) {
+ saved_mask = vap->va_mask;
+ vap->va_mask &= ~trim_mask;
+ if (trim_mask & AT_MODE) {
+ /*
+ * Save the mode, as secpolicy_vnode_setattr()
+ * will overwrite it with ova.va_mode.
+ */
+ saved_mode = vap->va_mode;
+ }
+ }
+ err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags,
+ (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
+ if (err) {
+ ZFS_EXIT(zfsvfs);
+ return (err);
+ }
+
+ if (trim_mask) {
+ vap->va_mask |= saved_mask;
+ if (trim_mask & AT_MODE) {
+ /*
+ * Recover the mode after
+ * secpolicy_vnode_setattr().
+ */
+ vap->va_mode = saved_mode;
+ }
+ }
+ }
+
+ /*
+ * secpolicy_vnode_setattr, or take ownership may have
+ * changed va_mask
+ */
+ mask = vap->va_mask;
+
+ if ((mask & (AT_UID | AT_GID)) || projid != ZFS_INVALID_PROJID) {
+ err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+ &xattr_obj, sizeof (xattr_obj));
+
+ if (err == 0 && xattr_obj) {
+ err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp);
+ if (err == 0) {
+ err = vn_lock(ZTOV(attrzp), LK_EXCLUSIVE);
+ if (err != 0)
+ vrele(ZTOV(attrzp));
+ }
+ if (err)
+ goto out2;
+ }
+ if (mask & AT_UID) {
+ new_uid = zfs_fuid_create(zfsvfs,
+ (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
+ if (new_uid != zp->z_uid &&
+ zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT,
+ new_uid)) {
+ if (attrzp)
+ vput(ZTOV(attrzp));
+ err = SET_ERROR(EDQUOT);
+ goto out2;
+ }
+ }
+
+ if (mask & AT_GID) {
+ new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid,
+ cr, ZFS_GROUP, &fuidp);
+ if (new_gid != zp->z_gid &&
+ zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT,
+ new_gid)) {
+ if (attrzp)
+ vput(ZTOV(attrzp));
+ err = SET_ERROR(EDQUOT);
+ goto out2;
+ }
+ }
+
+ if (projid != ZFS_INVALID_PROJID &&
+ zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) {
+ if (attrzp)
+ vput(ZTOV(attrzp));
+ err = SET_ERROR(EDQUOT);
+ goto out2;
+ }
+ }
+ tx = dmu_tx_create(os);
+
+ if (mask & AT_MODE) {
+ uint64_t pmode = zp->z_mode;
+ uint64_t acl_obj;
+ new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
+
+ if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED &&
+ !(zp->z_pflags & ZFS_ACL_TRIVIAL)) {
+ err = SET_ERROR(EPERM);
+ goto out;
+ }
+
+ if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)))
+ goto out;
+
+ if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) {
+ /*
+ * Are we upgrading ACL from old V0 format
+ * to V1 format?
+ */
+ if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
+ zfs_znode_acl_version(zp) ==
+ ZFS_ACL_VERSION_INITIAL) {
+ dmu_tx_hold_free(tx, acl_obj, 0,
+ DMU_OBJECT_END);
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, aclp->z_acl_bytes);
+ } else {
+ dmu_tx_hold_write(tx, acl_obj, 0,
+ aclp->z_acl_bytes);
+ }
+ } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, aclp->z_acl_bytes);
+ }
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ } else {
+ if (((mask & AT_XVATTR) &&
+ XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) ||
+ (projid != ZFS_INVALID_PROJID &&
+ !(zp->z_pflags & ZFS_PROJID)))
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ else
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ }
+
+ if (attrzp) {
+ dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE);
+ }
+
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+
+ zfs_sa_upgrade_txholds(tx, zp);
+
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err)
+ goto out;
+
+ count = 0;
+ /*
+ * Set each attribute requested.
+ * We group settings according to the locks they need to acquire.
+ *
+ * Note: you cannot set ctime directly, although it will be
+ * updated as a side-effect of calling this function.
+ */
+
+ if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) {
+ /*
+ * For the existed object that is upgraded from old system,
+ * its on-disk layout has no slot for the project ID attribute.
+ * But quota accounting logic needs to access related slots by
+ * offset directly. So we need to adjust old objects' layout
+ * to make the project ID to some unified and fixed offset.
+ */
+ if (attrzp)
+ err = sa_add_projid(attrzp->z_sa_hdl, tx, projid);
+ if (err == 0)
+ err = sa_add_projid(zp->z_sa_hdl, tx, projid);
+
+ if (unlikely(err == EEXIST))
+ err = 0;
+ else if (err != 0)
+ goto out;
+ else
+ projid = ZFS_INVALID_PROJID;
+ }
+
+ if (mask & (AT_UID|AT_GID|AT_MODE))
+ mutex_enter(&zp->z_acl_lock);
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, sizeof (zp->z_pflags));
+
+ if (attrzp) {
+ if (mask & (AT_UID|AT_GID|AT_MODE))
+ mutex_enter(&attrzp->z_acl_lock);
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags,
+ sizeof (attrzp->z_pflags));
+ if (projid != ZFS_INVALID_PROJID) {
+ attrzp->z_projid = projid;
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid,
+ sizeof (attrzp->z_projid));
+ }
+ }
+
+ if (mask & (AT_UID|AT_GID)) {
+
+ if (mask & AT_UID) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+ &new_uid, sizeof (new_uid));
+ zp->z_uid = new_uid;
+ if (attrzp) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_UID(zfsvfs), NULL, &new_uid,
+ sizeof (new_uid));
+ attrzp->z_uid = new_uid;
+ }
+ }
+
+ if (mask & AT_GID) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs),
+ NULL, &new_gid, sizeof (new_gid));
+ zp->z_gid = new_gid;
+ if (attrzp) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_GID(zfsvfs), NULL, &new_gid,
+ sizeof (new_gid));
+ attrzp->z_gid = new_gid;
+ }
+ }
+ if (!(mask & AT_MODE)) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs),
+ NULL, &new_mode, sizeof (new_mode));
+ new_mode = zp->z_mode;
+ }
+ err = zfs_acl_chown_setattr(zp);
+ ASSERT(err == 0);
+ if (attrzp) {
+ err = zfs_acl_chown_setattr(attrzp);
+ ASSERT(err == 0);
+ }
+ }
+
+ if (mask & AT_MODE) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+ &new_mode, sizeof (new_mode));
+ zp->z_mode = new_mode;
+ ASSERT3U((uintptr_t)aclp, !=, 0);
+ err = zfs_aclset_common(zp, aclp, cr, tx);
+ ASSERT0(err);
+ if (zp->z_acl_cached)
+ zfs_acl_free(zp->z_acl_cached);
+ zp->z_acl_cached = aclp;
+ aclp = NULL;
+ }
+
+
+ if (mask & AT_ATIME) {
+ ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+ &zp->z_atime, sizeof (zp->z_atime));
+ }
+
+ if (mask & AT_MTIME) {
+ ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+ mtime, sizeof (mtime));
+ }
+
+ if (projid != ZFS_INVALID_PROJID) {
+ zp->z_projid = projid;
+ SA_ADD_BULK_ATTR(bulk, count,
+ SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid,
+ sizeof (zp->z_projid));
+ }
+
+ /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
+ if (mask & AT_SIZE && !(mask & AT_MTIME)) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
+ NULL, mtime, sizeof (mtime));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+ &ctime, sizeof (ctime));
+ zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
+ } else if (mask != 0) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+ &ctime, sizeof (ctime));
+ zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime);
+ if (attrzp) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_CTIME(zfsvfs), NULL,
+ &ctime, sizeof (ctime));
+ zfs_tstamp_update_setup(attrzp, STATE_CHANGED,
+ mtime, ctime);
+ }
+ }
+
+ /*
+ * Do this after setting timestamps to prevent timestamp
+ * update from toggling bit
+ */
+
+ if (xoap && (mask & AT_XVATTR)) {
+
+ if (XVA_ISSET_REQ(xvap, XAT_CREATETIME))
+ xoap->xoa_createtime = vap->va_birthtime;
+ /*
+ * restore trimmed off masks
+ * so that return masks can be set for caller.
+ */
+
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) {
+ XVA_SET_REQ(xvap, XAT_APPENDONLY);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) {
+ XVA_SET_REQ(xvap, XAT_NOUNLINK);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) {
+ XVA_SET_REQ(xvap, XAT_IMMUTABLE);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) {
+ XVA_SET_REQ(xvap, XAT_NODUMP);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) {
+ XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) {
+ XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
+ }
+ if (XVA_ISSET_REQ(&tmpxvattr, XAT_PROJINHERIT)) {
+ XVA_SET_REQ(xvap, XAT_PROJINHERIT);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+ ASSERT(vp->v_type == VREG);
+
+ zfs_xvattr_set(zp, xvap, tx);
+ }
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ if (mask != 0)
+ zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
+
+ if (mask & (AT_UID|AT_GID|AT_MODE))
+ mutex_exit(&zp->z_acl_lock);
+
+ if (attrzp) {
+ if (mask & (AT_UID|AT_GID|AT_MODE))
+ mutex_exit(&attrzp->z_acl_lock);
+ }
+out:
+ if (err == 0 && attrzp) {
+ err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk,
+ xattr_count, tx);
+ ASSERT(err2 == 0);
+ }
+
+ if (attrzp)
+ vput(ZTOV(attrzp));
+
+ if (aclp)
+ zfs_acl_free(aclp);
+
+ if (fuidp) {
+ zfs_fuid_info_free(fuidp);
+ fuidp = NULL;
+ }
+
+ if (err) {
+ dmu_tx_abort(tx);
+ } else {
+ err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ dmu_tx_commit(tx);
+ }
+
+out2:
+ if (os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (err);
+}
+
+/*
+ * We acquire all but fdvp locks using non-blocking acquisitions. If we
+ * fail to acquire any lock in the path we will drop all held locks,
+ * acquire the new lock in a blocking fashion, and then release it and
+ * restart the rename. This acquire/release step ensures that we do not
+ * spin on a lock waiting for release. On error release all vnode locks
+ * and decrement references the way tmpfs_rename() would do.
+ */
+static int
+zfs_rename_relock(struct vnode *sdvp, struct vnode **svpp,
+ struct vnode *tdvp, struct vnode **tvpp,
+ const struct componentname *scnp, const struct componentname *tcnp)
+{
+ zfsvfs_t *zfsvfs;
+ struct vnode *nvp, *svp, *tvp;
+ znode_t *sdzp, *tdzp, *szp, *tzp;
+ const char *snm = scnp->cn_nameptr;
+ const char *tnm = tcnp->cn_nameptr;
+ int error;
+
+ VOP_UNLOCK1(tdvp);
+ if (*tvpp != NULL && *tvpp != tdvp)
+ VOP_UNLOCK1(*tvpp);
+
+relock:
+ error = vn_lock(sdvp, LK_EXCLUSIVE);
+ if (error)
+ goto out;
+ sdzp = VTOZ(sdvp);
+
+ error = vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT);
+ if (error != 0) {
+ VOP_UNLOCK1(sdvp);
+ if (error != EBUSY)
+ goto out;
+ error = vn_lock(tdvp, LK_EXCLUSIVE);
+ if (error)
+ goto out;
+ VOP_UNLOCK1(tdvp);
+ goto relock;
+ }
+ tdzp = VTOZ(tdvp);
+
+ /*
+ * Before using sdzp and tdzp we must ensure that they are live.
+ * As a porting legacy from illumos we have two things to worry
+ * about. One is typical for FreeBSD and it is that the vnode is
+ * not reclaimed (doomed). The other is that the znode is live.
+ * The current code can invalidate the znode without acquiring the
+ * corresponding vnode lock if the object represented by the znode
+ * and vnode is no longer valid after a rollback or receive operation.
+ * z_teardown_lock hidden behind ZFS_ENTER and ZFS_EXIT is the lock
+ * that protects the znodes from the invalidation.
+ */
+ zfsvfs = sdzp->z_zfsvfs;
+ ASSERT3P(zfsvfs, ==, tdzp->z_zfsvfs);
+ ZFS_ENTER(zfsvfs);
+
+ /*
+ * We can not use ZFS_VERIFY_ZP() here because it could directly return
+ * bypassing the cleanup code in the case of an error.
+ */
+ if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ error = SET_ERROR(EIO);
+ goto out;
+ }
+
+ /*
+ * Re-resolve svp to be certain it still exists and fetch the
+ * correct vnode.
+ */
+ error = zfs_dirent_lookup(sdzp, snm, &szp, ZEXISTS);
+ if (error != 0) {
+ /* Source entry invalid or not there. */
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ if ((scnp->cn_flags & ISDOTDOT) != 0 ||
+ (scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.'))
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+ svp = ZTOV(szp);
+
+ /*
+ * Re-resolve tvp, if it disappeared we just carry on.
+ */
+ error = zfs_dirent_lookup(tdzp, tnm, &tzp, 0);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ vrele(svp);
+ if ((tcnp->cn_flags & ISDOTDOT) != 0)
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+ if (tzp != NULL)
+ tvp = ZTOV(tzp);
+ else
+ tvp = NULL;
+
+ /*
+ * At present the vnode locks must be acquired before z_teardown_lock,
+ * although it would be more logical to use the opposite order.
+ */
+ ZFS_EXIT(zfsvfs);
+
+ /*
+ * Now try acquire locks on svp and tvp.
+ */
+ nvp = svp;
+ error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT);
+ if (error != 0) {
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ if (tvp != NULL)
+ vrele(tvp);
+ if (error != EBUSY) {
+ vrele(nvp);
+ goto out;
+ }
+ error = vn_lock(nvp, LK_EXCLUSIVE);
+ if (error != 0) {
+ vrele(nvp);
+ goto out;
+ }
+ VOP_UNLOCK1(nvp);
+ /*
+ * Concurrent rename race.
+ * XXX ?
+ */
+ if (nvp == tdvp) {
+ vrele(nvp);
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+ vrele(*svpp);
+ *svpp = nvp;
+ goto relock;
+ }
+ vrele(*svpp);
+ *svpp = nvp;
+
+ if (*tvpp != NULL)
+ vrele(*tvpp);
+ *tvpp = NULL;
+ if (tvp != NULL) {
+ nvp = tvp;
+ error = vn_lock(nvp, LK_EXCLUSIVE | LK_NOWAIT);
+ if (error != 0) {
+ VOP_UNLOCK1(sdvp);
+ VOP_UNLOCK1(tdvp);
+ VOP_UNLOCK1(*svpp);
+ if (error != EBUSY) {
+ vrele(nvp);
+ goto out;
+ }
+ error = vn_lock(nvp, LK_EXCLUSIVE);
+ if (error != 0) {
+ vrele(nvp);
+ goto out;
+ }
+ vput(nvp);
+ goto relock;
+ }
+ *tvpp = nvp;
+ }
+
+ return (0);
+
+out:
+ return (error);
+}
+
+/*
+ * Note that we must use VRELE_ASYNC in this function as it walks
+ * up the directory tree and vrele may need to acquire an exclusive
+ * lock if a last reference to a vnode is dropped.
+ */
+static int
+zfs_rename_check(znode_t *szp, znode_t *sdzp, znode_t *tdzp)
+{
+ zfsvfs_t *zfsvfs;
+ znode_t *zp, *zp1;
+ uint64_t parent;
+ int error;
+
+ zfsvfs = tdzp->z_zfsvfs;
+ if (tdzp == szp)
+ return (SET_ERROR(EINVAL));
+ if (tdzp == sdzp)
+ return (0);
+ if (tdzp->z_id == zfsvfs->z_root)
+ return (0);
+ zp = tdzp;
+ for (;;) {
+ ASSERT(!zp->z_unlinked);
+ if ((error = sa_lookup(zp->z_sa_hdl,
+ SA_ZPL_PARENT(zfsvfs), &parent, sizeof (parent))) != 0)
+ break;
+
+ if (parent == szp->z_id) {
+ error = SET_ERROR(EINVAL);
+ break;
+ }
+ if (parent == zfsvfs->z_root)
+ break;
+ if (parent == sdzp->z_id)
+ break;
+
+ error = zfs_zget(zfsvfs, parent, &zp1);
+ if (error != 0)
+ break;
+
+ if (zp != tdzp)
+ VN_RELE_ASYNC(ZTOV(zp),
+ dsl_pool_zrele_taskq(
+ dmu_objset_pool(zfsvfs->z_os)));
+ zp = zp1;
+ }
+
+ if (error == ENOTDIR)
+ panic("checkpath: .. not a directory\n");
+ if (zp != tdzp)
+ VN_RELE_ASYNC(ZTOV(zp),
+ dsl_pool_zrele_taskq(dmu_objset_pool(zfsvfs->z_os)));
+ return (error);
+}
+
+#if __FreeBSD_version < 1300110
+static void
+cache_rename(struct vnode *fdvp, struct vnode *fvp, struct vnode *tdvp,
+ struct vnode *tvp, struct componentname *fcnp, struct componentname *tcnp)
+{
+
+ cache_purge(fvp);
+ if (tvp != NULL)
+ cache_purge(tvp);
+ cache_purge_negative(tdvp);
+}
+#endif
+
+/*
+ * Move an entry from the provided source directory to the target
+ * directory. Change the entry name as indicated.
+ *
+ * IN: sdvp - Source directory containing the "old entry".
+ * snm - Old entry name.
+ * tdvp - Target directory to contain the "new entry".
+ * tnm - New entry name.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * sdvp,tdvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+static int
+zfs_rename_(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp,
+ vnode_t *tdvp, vnode_t **tvpp, struct componentname *tcnp,
+ cred_t *cr, int log)
+{
+ zfsvfs_t *zfsvfs;
+ znode_t *sdzp, *tdzp, *szp, *tzp;
+ zilog_t *zilog = NULL;
+ dmu_tx_t *tx;
+ const char *snm = scnp->cn_nameptr;
+ const char *tnm = tcnp->cn_nameptr;
+ int error = 0;
+ bool want_seqc_end __maybe_unused = false;
+
+ /* Reject renames across filesystems. */
+ if ((*svpp)->v_mount != tdvp->v_mount ||
+ ((*tvpp) != NULL && (*svpp)->v_mount != (*tvpp)->v_mount)) {
+ error = SET_ERROR(EXDEV);
+ goto out;
+ }
+
+ if (zfsctl_is_node(tdvp)) {
+ error = SET_ERROR(EXDEV);
+ goto out;
+ }
+
+ /*
+ * Lock all four vnodes to ensure safety and semantics of renaming.
+ */
+ error = zfs_rename_relock(sdvp, svpp, tdvp, tvpp, scnp, tcnp);
+ if (error != 0) {
+ /* no vnodes are locked in the case of error here */
+ return (error);
+ }
+
+ tdzp = VTOZ(tdvp);
+ sdzp = VTOZ(sdvp);
+ zfsvfs = tdzp->z_zfsvfs;
+ zilog = zfsvfs->z_log;
+
+ /*
+ * After we re-enter ZFS_ENTER() we will have to revalidate all
+ * znodes involved.
+ */
+ ZFS_ENTER(zfsvfs);
+
+ if (zfsvfs->z_utf8 && u8_validate(tnm,
+ strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ error = SET_ERROR(EILSEQ);
+ goto unlockout;
+ }
+
+ /* If source and target are the same file, there is nothing to do. */
+ if ((*svpp) == (*tvpp)) {
+ error = 0;
+ goto unlockout;
+ }
+
+ if (((*svpp)->v_type == VDIR && (*svpp)->v_mountedhere != NULL) ||
+ ((*tvpp) != NULL && (*tvpp)->v_type == VDIR &&
+ (*tvpp)->v_mountedhere != NULL)) {
+ error = SET_ERROR(EXDEV);
+ goto unlockout;
+ }
+
+ /*
+ * We can not use ZFS_VERIFY_ZP() here because it could directly return
+ * bypassing the cleanup code in the case of an error.
+ */
+ if (tdzp->z_sa_hdl == NULL || sdzp->z_sa_hdl == NULL) {
+ error = SET_ERROR(EIO);
+ goto unlockout;
+ }
+
+ szp = VTOZ(*svpp);
+ tzp = *tvpp == NULL ? NULL : VTOZ(*tvpp);
+ if (szp->z_sa_hdl == NULL || (tzp != NULL && tzp->z_sa_hdl == NULL)) {
+ error = SET_ERROR(EIO);
+ goto unlockout;
+ }
+
+ /*
+ * This is to prevent the creation of links into attribute space
+ * by renaming a linked file into/outof an attribute directory.
+ * See the comment in zfs_link() for why this is considered bad.
+ */
+ if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) {
+ error = SET_ERROR(EINVAL);
+ goto unlockout;
+ }
+
+ /*
+ * If we are using project inheritance, means if the directory has
+ * ZFS_PROJINHERIT set, then its descendant directories will inherit
+ * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
+ * such case, we only allow renames into our tree when the project
+ * IDs are the same.
+ */
+ if (tdzp->z_pflags & ZFS_PROJINHERIT &&
+ tdzp->z_projid != szp->z_projid) {
+ error = SET_ERROR(EXDEV);
+ goto unlockout;
+ }
+
+ /*
+ * Must have write access at the source to remove the old entry
+ * and write access at the target to create the new entry.
+ * Note that if target and source are the same, this can be
+ * done in a single check.
+ */
+ if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)))
+ goto unlockout;
+
+ if ((*svpp)->v_type == VDIR) {
+ /*
+ * Avoid ".", "..", and aliases of "." for obvious reasons.
+ */
+ if ((scnp->cn_namelen == 1 && scnp->cn_nameptr[0] == '.') ||
+ sdzp == szp ||
+ (scnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) {
+ error = EINVAL;
+ goto unlockout;
+ }
+
+ /*
+ * Check to make sure rename is valid.
+ * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
+ */
+ if ((error = zfs_rename_check(szp, sdzp, tdzp)))
+ goto unlockout;
+ }
+
+ /*
+ * Does target exist?
+ */
+ if (tzp) {
+ /*
+ * Source and target must be the same type.
+ */
+ if ((*svpp)->v_type == VDIR) {
+ if ((*tvpp)->v_type != VDIR) {
+ error = SET_ERROR(ENOTDIR);
+ goto unlockout;
+ } else {
+ cache_purge(tdvp);
+ if (sdvp != tdvp)
+ cache_purge(sdvp);
+ }
+ } else {
+ if ((*tvpp)->v_type == VDIR) {
+ error = SET_ERROR(EISDIR);
+ goto unlockout;
+ }
+ }
+ }
+
+ vn_seqc_write_begin(*svpp);
+ vn_seqc_write_begin(sdvp);
+ if (*tvpp != NULL)
+ vn_seqc_write_begin(*tvpp);
+ if (tdvp != *tvpp)
+ vn_seqc_write_begin(tdvp);
+#if __FreeBSD_version >= 1300102
+ want_seqc_end = true;
+#endif
+ vnevent_rename_src(*svpp, sdvp, scnp->cn_nameptr, ct);
+ if (tzp)
+ vnevent_rename_dest(*tvpp, tdvp, tnm, ct);
+
+ /*
+ * notify the target directory if it is not the same
+ * as source directory.
+ */
+ if (tdvp != sdvp) {
+ vnevent_rename_dest_dir(tdvp, ct);
+ }
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
+ dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
+ if (sdzp != tdzp) {
+ dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, tdzp);
+ }
+ if (tzp) {
+ dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, tzp);
+ }
+
+ zfs_sa_upgrade_txholds(tx, szp);
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ goto unlockout;
+ }
+
+
+ if (tzp) /* Attempt to remove the existing target */
+ error = zfs_link_destroy(tdzp, tnm, tzp, tx, 0, NULL);
+
+ if (error == 0) {
+ error = zfs_link_create(tdzp, tnm, szp, tx, ZRENAMING);
+ if (error == 0) {
+ szp->z_pflags |= ZFS_AV_MODIFIED;
+
+ error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
+ (void *)&szp->z_pflags, sizeof (uint64_t), tx);
+ ASSERT0(error);
+
+ error = zfs_link_destroy(sdzp, snm, szp, tx, ZRENAMING,
+ NULL);
+ if (error == 0) {
+ zfs_log_rename(zilog, tx, TX_RENAME, sdzp,
+ snm, tdzp, tnm, szp);
+
+ /*
+ * Update path information for the target vnode
+ */
+ vn_renamepath(tdvp, *svpp, tnm, strlen(tnm));
+ } else {
+ /*
+ * At this point, we have successfully created
+ * the target name, but have failed to remove
+ * the source name. Since the create was done
+ * with the ZRENAMING flag, there are
+ * complications; for one, the link count is
+ * wrong. The easiest way to deal with this
+ * is to remove the newly created target, and
+ * return the original error. This must
+ * succeed; fortunately, it is very unlikely to
+ * fail, since we just created it.
+ */
+ VERIFY3U(zfs_link_destroy(tdzp, tnm, szp, tx,
+ ZRENAMING, NULL), ==, 0);
+ }
+ }
+ if (error == 0) {
+ cache_rename(sdvp, *svpp, tdvp, *tvpp, scnp, tcnp);
+ }
+ }
+
+ dmu_tx_commit(tx);
+
+unlockout: /* all 4 vnodes are locked, ZFS_ENTER called */
+ ZFS_EXIT(zfsvfs);
+ if (want_seqc_end) {
+ vn_seqc_write_end(*svpp);
+ vn_seqc_write_end(sdvp);
+ if (*tvpp != NULL)
+ vn_seqc_write_end(*tvpp);
+ if (tdvp != *tvpp)
+ vn_seqc_write_end(tdvp);
+ want_seqc_end = false;
+ }
+ VOP_UNLOCK1(*svpp);
+ VOP_UNLOCK1(sdvp);
+
+out: /* original two vnodes are locked */
+ MPASS(!want_seqc_end);
+ if (error == 0 && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ if (*tvpp != NULL)
+ VOP_UNLOCK1(*tvpp);
+ if (tdvp != *tvpp)
+ VOP_UNLOCK1(tdvp);
+ return (error);
+}
+
+int
+zfs_rename(znode_t *sdzp, const char *sname, znode_t *tdzp, const char *tname,
+ cred_t *cr, int flags)
+{
+ struct componentname scn, tcn;
+ vnode_t *sdvp, *tdvp;
+ vnode_t *svp, *tvp;
+ int error;
+ svp = tvp = NULL;
+
+ sdvp = ZTOV(sdzp);
+ tdvp = ZTOV(tdzp);
+ error = zfs_lookup_internal(sdzp, sname, &svp, &scn, DELETE);
+ if (sdzp->z_zfsvfs->z_replay == B_FALSE)
+ VOP_UNLOCK1(sdvp);
+ if (error != 0)
+ goto fail;
+ VOP_UNLOCK1(svp);
+
+ vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY);
+ error = zfs_lookup_internal(tdzp, tname, &tvp, &tcn, RENAME);
+ if (error == EJUSTRETURN)
+ tvp = NULL;
+ else if (error != 0) {
+ VOP_UNLOCK1(tdvp);
+ goto fail;
+ }
+
+ error = zfs_rename_(sdvp, &svp, &scn, tdvp, &tvp, &tcn, cr, 0);
+fail:
+ if (svp != NULL)
+ vrele(svp);
+ if (tvp != NULL)
+ vrele(tvp);
+
+ return (error);
+}
+
+/*
+ * Insert the indicated symbolic reference entry into the directory.
+ *
+ * IN: dvp - Directory to contain new symbolic link.
+ * link - Name for new symlink entry.
+ * vap - Attributes of new entry.
+ * cr - credentials of caller.
+ * ct - caller context
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dvp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+int
+zfs_symlink(znode_t *dzp, const char *name, vattr_t *vap,
+ const char *link, znode_t **zpp, cred_t *cr, int flags)
+{
+ znode_t *zp;
+ dmu_tx_t *tx;
+ zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
+ zilog_t *zilog;
+ uint64_t len = strlen(link);
+ int error;
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+ uint64_t txtype = TX_SYMLINK;
+
+ ASSERT(vap->va_type == VLNK);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ if (len > MAXPATHLEN) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENAMETOOLONG));
+ }
+
+ if ((error = zfs_acl_ids_create(dzp, 0,
+ vap, cr, NULL, &acl_ids)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Attempt to lock directory; fail if entry already exists.
+ */
+ error = zfs_dirent_lookup(dzp, name, &zp, ZNEW);
+ if (error) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids,
+ 0 /* projid */)) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EDQUOT));
+ }
+
+ getnewvnode_reserve_();
+ tx = dmu_tx_create(zfsvfs->z_os);
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE + len);
+ dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+ if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+ acl_ids.z_aclp->z_acl_bytes);
+ }
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ getnewvnode_drop_reserve();
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Create a new object for the symlink.
+ * for version 4 ZPL datsets the symlink will be an SA attribute
+ */
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ if (zp->z_is_sa)
+ error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs),
+ __DECONST(void *, link), len, tx);
+ else
+ zfs_sa_symlink(zp, __DECONST(char *, link), len, tx);
+
+ zp->z_size = len;
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+ &zp->z_size, sizeof (zp->z_size), tx);
+ /*
+ * Insert the new object into the directory.
+ */
+ (void) zfs_link_create(dzp, name, zp, tx, ZNEW);
+
+ zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
+ *zpp = zp;
+
+ zfs_acl_ids_free(&acl_ids);
+
+ dmu_tx_commit(tx);
+
+ getnewvnode_drop_reserve();
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Return, in the buffer contained in the provided uio structure,
+ * the symbolic path referred to by vp.
+ *
+ * IN: vp - vnode of symbolic link.
+ * uio - structure to contain the link path.
+ * cr - credentials of caller.
+ * ct - caller context
+ *
+ * OUT: uio - structure containing the link path.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * vp - atime updated
+ */
+/* ARGSUSED */
+static int
+zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (zp->z_is_sa)
+ error = sa_lookup_uio(zp->z_sa_hdl,
+ SA_ZPL_SYMLINK(zfsvfs), uio);
+ else
+ error = zfs_sa_readlink(zp, uio);
+
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Insert a new entry into directory tdvp referencing svp.
+ *
+ * IN: tdvp - Directory to contain new entry.
+ * svp - vnode of new entry.
+ * name - name of new entry.
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * tdvp - ctime|mtime updated
+ * svp - ctime updated
+ */
+/* ARGSUSED */
+int
+zfs_link(znode_t *tdzp, znode_t *szp, const char *name, cred_t *cr,
+ int flags)
+{
+ znode_t *tzp;
+ zfsvfs_t *zfsvfs = tdzp->z_zfsvfs;
+ zilog_t *zilog;
+ dmu_tx_t *tx;
+ int error;
+ uint64_t parent;
+ uid_t owner;
+
+ ASSERT(ZTOV(tdzp)->v_type == VDIR);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(tdzp);
+ zilog = zfsvfs->z_log;
+
+ /*
+ * POSIX dictates that we return EPERM here.
+ * Better choices include ENOTSUP or EISDIR.
+ */
+ if (ZTOV(szp)->v_type == VDIR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ ZFS_VERIFY_ZP(szp);
+
+ /*
+ * If we are using project inheritance, means if the directory has
+ * ZFS_PROJINHERIT set, then its descendant directories will inherit
+ * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
+ * such case, we only allow hard link creation in our tree when the
+ * project IDs are the same.
+ */
+ if (tdzp->z_pflags & ZFS_PROJINHERIT &&
+ tdzp->z_projid != szp->z_projid) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EXDEV));
+ }
+
+ if (szp->z_pflags & (ZFS_APPENDONLY |
+ ZFS_IMMUTABLE | ZFS_READONLY)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ /* Prevent links to .zfs/shares files */
+
+ if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+ &parent, sizeof (uint64_t))) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ if (parent == zfsvfs->z_shares_dir) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(name,
+ strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ /*
+ * We do not support links between attributes and non-attributes
+ * because of the potential security risk of creating links
+ * into "normal" file space in order to circumvent restrictions
+ * imposed in attribute space.
+ */
+ if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+
+ owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER);
+ if (owner != crgetuid(cr) && secpolicy_basic_link(ZTOV(szp), cr) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Attempt to lock directory; fail if entry already exists.
+ */
+ error = zfs_dirent_lookup(tdzp, name, &tzp, ZNEW);
+ if (error) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name);
+ zfs_sa_upgrade_txholds(tx, szp);
+ zfs_sa_upgrade_txholds(tx, tdzp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ error = zfs_link_create(tdzp, name, szp, tx, 0);
+
+ if (error == 0) {
+ uint64_t txtype = TX_LINK;
+ zfs_log_link(zilog, tx, txtype, tdzp, szp, name);
+ }
+
+ dmu_tx_commit(tx);
+
+ if (error == 0) {
+ vnevent_link(ZTOV(szp), ct);
+ }
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Free or allocate space in a file. Currently, this function only
+ * supports the `F_FREESP' command. However, this command is somewhat
+ * misnamed, as its functionality includes the ability to allocate as
+ * well as free space.
+ *
+ * IN: ip - inode of file to free data in.
+ * cmd - action to take (only F_FREESP supported).
+ * bfp - section of file to free/alloc.
+ * flag - current file open mode flags.
+ * offset - current file offset.
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * ip - ctime|mtime updated
+ */
+/* ARGSUSED */
+int
+zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
+ offset_t offset, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ uint64_t off, len;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (cmd != F_FREESP) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Callers might not be able to detect properly that we are read-only,
+ * so check it explicitly here.
+ */
+ if (zfs_is_readonly(zfsvfs)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EROFS));
+ }
+
+ if (bfp->l_len < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Permissions aren't checked on Solaris because on this OS
+ * zfs_space() can only be called with an opened file handle.
+ * On Linux we can get here through truncate_range() which
+ * operates directly on inodes, so we need to check access rights.
+ */
+ if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ off = bfp->l_start;
+ len = bfp->l_len; /* 0 means from off to end of file */
+
+ error = zfs_freesp(zp, off, len, flag, TRUE);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*ARGSUSED*/
+static void
+zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int error;
+
+ ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs);
+ if (zp->z_sa_hdl == NULL) {
+ /*
+ * The fs has been unmounted, or we did a
+ * suspend/resume and this file no longer exists.
+ */
+ ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
+ vrecycle(vp);
+ return;
+ }
+
+ if (zp->z_unlinked) {
+ /*
+ * Fast path to recycle a vnode of a removed file.
+ */
+ ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
+ vrecycle(vp);
+ return;
+ }
+
+ if (zp->z_atime_dirty && zp->z_unlinked == 0) {
+ dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ } else {
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs),
+ (void *)&zp->z_atime, sizeof (zp->z_atime), tx);
+ zp->z_atime_dirty = 0;
+ dmu_tx_commit(tx);
+ }
+ }
+ ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
+}
+
+
+CTASSERT(sizeof (struct zfid_short) <= sizeof (struct fid));
+CTASSERT(sizeof (struct zfid_long) <= sizeof (struct fid));
+
+/*ARGSUSED*/
+static int
+zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ uint32_t gen;
+ uint64_t gen64;
+ uint64_t object = zp->z_id;
+ zfid_short_t *zfid;
+ int size, i, error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs),
+ &gen64, sizeof (uint64_t))) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ gen = (uint32_t)gen64;
+
+ size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN;
+ fidp->fid_len = size;
+
+ zfid = (zfid_short_t *)fidp;
+
+ zfid->zf_len = size;
+
+ for (i = 0; i < sizeof (zfid->zf_object); i++)
+ zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
+
+ /* Must have a non-zero generation number to distinguish from .zfs */
+ if (gen == 0)
+ gen = 1;
+ for (i = 0; i < sizeof (zfid->zf_gen); i++)
+ zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
+
+ if (size == LONG_FID_LEN) {
+ uint64_t objsetid = dmu_objset_id(zfsvfs->z_os);
+ zfid_long_t *zlfid;
+
+ zlfid = (zfid_long_t *)fidp;
+
+ for (i = 0; i < sizeof (zlfid->zf_setid); i++)
+ zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i));
+
+ /* XXX - this should be the generation number for the objset */
+ for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
+ zlfid->zf_setgen[i] = 0;
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+static int
+zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
+ caller_context_t *ct)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs;
+
+ switch (cmd) {
+ case _PC_LINK_MAX:
+ *valp = MIN(LONG_MAX, ZFS_LINK_MAX);
+ return (0);
+
+ case _PC_FILESIZEBITS:
+ *valp = 64;
+ return (0);
+ case _PC_MIN_HOLE_SIZE:
+ *valp = (int)SPA_MINBLOCKSIZE;
+ return (0);
+ case _PC_ACL_EXTENDED:
+#if 0 /* POSIX ACLs are not implemented for ZFS on FreeBSD yet. */
+ zp = VTOZ(vp);
+ zfsvfs = zp->z_zfsvfs;
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ *valp = zfsvfs->z_acl_type == ZFSACLTYPE_POSIX ? 1 : 0;
+ ZFS_EXIT(zfsvfs);
+#else
+ *valp = 0;
+#endif
+ return (0);
+
+ case _PC_ACL_NFS4:
+ zp = VTOZ(vp);
+ zfsvfs = zp->z_zfsvfs;
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ *valp = zfsvfs->z_acl_type == ZFS_ACLTYPE_NFSV4 ? 1 : 0;
+ ZFS_EXIT(zfsvfs);
+ return (0);
+
+ case _PC_ACL_PATH_MAX:
+ *valp = ACL_MAX_ENTRIES;
+ return (0);
+
+ default:
+ return (EOPNOTSUPP);
+ }
+}
+
+static int
+zfs_getpages(struct vnode *vp, vm_page_t *ma, int count, int *rbehind,
+ int *rahead)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ objset_t *os = zp->z_zfsvfs->z_os;
+ zfs_locked_range_t *lr;
+ vm_object_t object;
+ off_t start, end, obj_size;
+ uint_t blksz;
+ int pgsin_b, pgsin_a;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ start = IDX_TO_OFF(ma[0]->pindex);
+ end = IDX_TO_OFF(ma[count - 1]->pindex + 1);
+
+ /*
+ * Lock a range covering all required and optional pages.
+ * Note that we need to handle the case of the block size growing.
+ */
+ for (;;) {
+ blksz = zp->z_blksz;
+ lr = zfs_rangelock_tryenter(&zp->z_rangelock,
+ rounddown(start, blksz),
+ roundup(end, blksz) - rounddown(start, blksz), RL_READER);
+ if (lr == NULL) {
+ if (rahead != NULL) {
+ *rahead = 0;
+ rahead = NULL;
+ }
+ if (rbehind != NULL) {
+ *rbehind = 0;
+ rbehind = NULL;
+ }
+ break;
+ }
+ if (blksz == zp->z_blksz)
+ break;
+ zfs_rangelock_exit(lr);
+ }
+
+ object = ma[0]->object;
+ zfs_vmobject_wlock(object);
+ obj_size = object->un_pager.vnp.vnp_size;
+ zfs_vmobject_wunlock(object);
+ if (IDX_TO_OFF(ma[count - 1]->pindex) >= obj_size) {
+ if (lr != NULL)
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (zfs_vm_pagerret_bad);
+ }
+
+ pgsin_b = 0;
+ if (rbehind != NULL) {
+ pgsin_b = OFF_TO_IDX(start - rounddown(start, blksz));
+ pgsin_b = MIN(*rbehind, pgsin_b);
+ }
+
+ pgsin_a = 0;
+ if (rahead != NULL) {
+ pgsin_a = OFF_TO_IDX(roundup(end, blksz) - end);
+ if (end + IDX_TO_OFF(pgsin_a) >= obj_size)
+ pgsin_a = OFF_TO_IDX(round_page(obj_size) - end);
+ pgsin_a = MIN(*rahead, pgsin_a);
+ }
+
+ /*
+ * NB: we need to pass the exact byte size of the data that we expect
+ * to read after accounting for the file size. This is required because
+ * ZFS will panic if we request DMU to read beyond the end of the last
+ * allocated block.
+ */
+ error = dmu_read_pages(os, zp->z_id, ma, count, &pgsin_b, &pgsin_a,
+ MIN(end, obj_size) - (end - PAGE_SIZE));
+
+ if (lr != NULL)
+ zfs_rangelock_exit(lr);
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+ ZFS_EXIT(zfsvfs);
+
+ if (error != 0)
+ return (zfs_vm_pagerret_error);
+
+ VM_CNT_INC(v_vnodein);
+ VM_CNT_ADD(v_vnodepgsin, count + pgsin_b + pgsin_a);
+ if (rbehind != NULL)
+ *rbehind = pgsin_b;
+ if (rahead != NULL)
+ *rahead = pgsin_a;
+ return (zfs_vm_pagerret_ok);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_getpages_args {
+ struct vnode *a_vp;
+ vm_page_t *a_m;
+ int a_count;
+ int *a_rbehind;
+ int *a_rahead;
+};
+#endif
+
+static int
+zfs_freebsd_getpages(struct vop_getpages_args *ap)
+{
+
+ return (zfs_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind,
+ ap->a_rahead));
+}
+
+static int
+zfs_putpages(struct vnode *vp, vm_page_t *ma, size_t len, int flags,
+ int *rtvals)
+{
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ zfs_locked_range_t *lr;
+ dmu_tx_t *tx;
+ struct sf_buf *sf;
+ vm_object_t object;
+ vm_page_t m;
+ caddr_t va;
+ size_t tocopy;
+ size_t lo_len;
+ vm_ooffset_t lo_off;
+ vm_ooffset_t off;
+ uint_t blksz;
+ int ncount;
+ int pcount;
+ int err;
+ int i;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ object = vp->v_object;
+ pcount = btoc(len);
+ ncount = pcount;
+
+ KASSERT(ma[0]->object == object, ("mismatching object"));
+ KASSERT(len > 0 && (len & PAGE_MASK) == 0, ("unexpected length"));
+
+ for (i = 0; i < pcount; i++)
+ rtvals[i] = zfs_vm_pagerret_error;
+
+ off = IDX_TO_OFF(ma[0]->pindex);
+ blksz = zp->z_blksz;
+ lo_off = rounddown(off, blksz);
+ lo_len = roundup(len + (off - lo_off), blksz);
+ lr = zfs_rangelock_enter(&zp->z_rangelock, lo_off, lo_len, RL_WRITER);
+
+ zfs_vmobject_wlock(object);
+ if (len + off > object->un_pager.vnp.vnp_size) {
+ if (object->un_pager.vnp.vnp_size > off) {
+ int pgoff;
+
+ len = object->un_pager.vnp.vnp_size - off;
+ ncount = btoc(len);
+ if ((pgoff = (int)len & PAGE_MASK) != 0) {
+ /*
+ * If the object is locked and the following
+ * conditions hold, then the page's dirty
+ * field cannot be concurrently changed by a
+ * pmap operation.
+ */
+ m = ma[ncount - 1];
+ vm_page_assert_sbusied(m);
+ KASSERT(!pmap_page_is_write_mapped(m),
+ ("zfs_putpages: page %p is not read-only",
+ m));
+ vm_page_clear_dirty(m, pgoff, PAGE_SIZE -
+ pgoff);
+ }
+ } else {
+ len = 0;
+ ncount = 0;
+ }
+ if (ncount < pcount) {
+ for (i = ncount; i < pcount; i++) {
+ rtvals[i] = zfs_vm_pagerret_bad;
+ }
+ }
+ }
+ zfs_vmobject_wunlock(object);
+
+ if (ncount == 0)
+ goto out;
+
+ if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, zp->z_uid) ||
+ zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, zp->z_gid) ||
+ (zp->z_projid != ZFS_DEFAULT_PROJID &&
+ zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
+ zp->z_projid))) {
+ goto out;
+ }
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_write(tx, zp->z_id, off, len);
+
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err != 0) {
+ dmu_tx_abort(tx);
+ goto out;
+ }
+
+ if (zp->z_blksz < PAGE_SIZE) {
+ for (i = 0; len > 0; off += tocopy, len -= tocopy, i++) {
+ tocopy = len > PAGE_SIZE ? PAGE_SIZE : len;
+ va = zfs_map_page(ma[i], &sf);
+ dmu_write(zfsvfs->z_os, zp->z_id, off, tocopy, va, tx);
+ zfs_unmap_page(sf);
+ }
+ } else {
+ err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, ma, tx);
+ }
+
+ if (err == 0) {
+ uint64_t mtime[2], ctime[2];
+ sa_bulk_attr_t bulk[3];
+ int count = 0;
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+ &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+ &ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, 8);
+ zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
+ err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ ASSERT0(err);
+ /*
+ * XXX we should be passing a callback to undirty
+ * but that would make the locking messier
+ */
+ zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off,
+ len, 0, NULL, NULL);
+
+ zfs_vmobject_wlock(object);
+ for (i = 0; i < ncount; i++) {
+ rtvals[i] = zfs_vm_pagerret_ok;
+ vm_page_undirty(ma[i]);
+ }
+ zfs_vmobject_wunlock(object);
+ VM_CNT_INC(v_vnodeout);
+ VM_CNT_ADD(v_vnodepgsout, ncount);
+ }
+ dmu_tx_commit(tx);
+
+out:
+ zfs_rangelock_exit(lr);
+ if ((flags & (zfs_vm_pagerput_sync | zfs_vm_pagerput_inval)) != 0 ||
+ zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zfsvfs->z_log, zp->z_id);
+ ZFS_EXIT(zfsvfs);
+ return (rtvals[0]);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_putpages_args {
+ struct vnode *a_vp;
+ vm_page_t *a_m;
+ int a_count;
+ int a_sync;
+ int *a_rtvals;
+};
+#endif
+
+static int
+zfs_freebsd_putpages(struct vop_putpages_args *ap)
+{
+
+ return (zfs_putpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_sync,
+ ap->a_rtvals));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_bmap_args {
+ struct vnode *a_vp;
+ daddr_t a_bn;
+ struct bufobj **a_bop;
+ daddr_t *a_bnp;
+ int *a_runp;
+ int *a_runb;
+};
+#endif
+
+static int
+zfs_freebsd_bmap(struct vop_bmap_args *ap)
+{
+
+ if (ap->a_bop != NULL)
+ *ap->a_bop = &ap->a_vp->v_bufobj;
+ if (ap->a_bnp != NULL)
+ *ap->a_bnp = ap->a_bn;
+ if (ap->a_runp != NULL)
+ *ap->a_runp = 0;
+ if (ap->a_runb != NULL)
+ *ap->a_runb = 0;
+
+ return (0);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_open_args {
+ struct vnode *a_vp;
+ int a_mode;
+ struct ucred *a_cred;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_open(struct vop_open_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+ znode_t *zp = VTOZ(vp);
+ int error;
+
+ error = zfs_open(&vp, ap->a_mode, ap->a_cred);
+ if (error == 0)
+ vnode_create_vobject(vp, zp->z_size, ap->a_td);
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_close_args {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_close(struct vop_close_args *ap)
+{
+
+ return (zfs_close(ap->a_vp, ap->a_fflag, 1, 0, ap->a_cred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_ioctl_args {
+ struct vnode *a_vp;
+ ulong_t a_command;
+ caddr_t a_data;
+ int a_fflag;
+ struct ucred *cred;
+ struct thread *td;
+};
+#endif
+
+static int
+zfs_freebsd_ioctl(struct vop_ioctl_args *ap)
+{
+
+ return (zfs_ioctl(ap->a_vp, ap->a_command, (intptr_t)ap->a_data,
+ ap->a_fflag, ap->a_cred, NULL));
+}
+
+static int
+ioflags(int ioflags)
+{
+ int flags = 0;
+
+ if (ioflags & IO_APPEND)
+ flags |= FAPPEND;
+ if (ioflags & IO_NDELAY)
+ flags |= FNONBLOCK;
+ if (ioflags & IO_SYNC)
+ flags |= (FSYNC | FDSYNC | FRSYNC);
+
+ return (flags);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_read_args {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+};
+#endif
+
+static int
+zfs_freebsd_read(struct vop_read_args *ap)
+{
+
+ return (zfs_read(VTOZ(ap->a_vp), ap->a_uio, ioflags(ap->a_ioflag),
+ ap->a_cred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_write_args {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+};
+#endif
+
+static int
+zfs_freebsd_write(struct vop_write_args *ap)
+{
+
+ return (zfs_write(VTOZ(ap->a_vp), ap->a_uio, ioflags(ap->a_ioflag),
+ ap->a_cred));
+}
+
+#if __FreeBSD_version >= 1300102
+/*
+ * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see
+ * the comment above cache_fplookup for details.
+ */
+static int
+zfs_freebsd_fplookup_vexec(struct vop_fplookup_vexec_args *v)
+{
+ vnode_t *vp;
+ znode_t *zp;
+ uint64_t pflags;
+
+ vp = v->a_vp;
+ zp = VTOZ_SMR(vp);
+ if (__predict_false(zp == NULL))
+ return (EAGAIN);
+ pflags = atomic_load_64(&zp->z_pflags);
+ if (pflags & ZFS_AV_QUARANTINED)
+ return (EAGAIN);
+ if (pflags & ZFS_XATTR)
+ return (EAGAIN);
+ if ((pflags & ZFS_NO_EXECS_DENIED) == 0)
+ return (EAGAIN);
+ return (0);
+}
+#endif
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_access_args {
+ struct vnode *a_vp;
+ accmode_t a_accmode;
+ struct ucred *a_cred;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_access(struct vop_access_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+ znode_t *zp = VTOZ(vp);
+ accmode_t accmode;
+ int error = 0;
+
+
+ if (ap->a_accmode == VEXEC) {
+ if (zfs_fastaccesschk_execute(zp, ap->a_cred) == 0)
+ return (0);
+ }
+
+ /*
+ * ZFS itself only knowns about VREAD, VWRITE, VEXEC and VAPPEND,
+ */
+ accmode = ap->a_accmode & (VREAD|VWRITE|VEXEC|VAPPEND);
+ if (accmode != 0)
+ error = zfs_access(ap->a_vp, accmode, 0, ap->a_cred, NULL);
+
+ /*
+ * VADMIN has to be handled by vaccess().
+ */
+ if (error == 0) {
+ accmode = ap->a_accmode & ~(VREAD|VWRITE|VEXEC|VAPPEND);
+ if (accmode != 0) {
+#if __FreeBSD_version >= 1300105
+ error = vaccess(vp->v_type, zp->z_mode, zp->z_uid,
+ zp->z_gid, accmode, ap->a_cred);
+#else
+ error = vaccess(vp->v_type, zp->z_mode, zp->z_uid,
+ zp->z_gid, accmode, ap->a_cred, NULL);
+#endif
+ }
+ }
+
+ /*
+ * For VEXEC, ensure that at least one execute bit is set for
+ * non-directories.
+ */
+ if (error == 0 && (ap->a_accmode & VEXEC) != 0 && vp->v_type != VDIR &&
+ (zp->z_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0) {
+ error = EACCES;
+ }
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_lookup_args {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+};
+#endif
+
+static int
+zfs_freebsd_lookup(struct vop_lookup_args *ap, boolean_t cached)
+{
+ struct componentname *cnp = ap->a_cnp;
+ char nm[NAME_MAX + 1];
+
+ ASSERT(cnp->cn_namelen < sizeof (nm));
+ strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof (nm)));
+
+ return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop,
+ cnp->cn_cred, cnp->cn_thread, 0, cached));
+}
+
+static int
+zfs_freebsd_cachedlookup(struct vop_cachedlookup_args *ap)
+{
+
+ return (zfs_freebsd_lookup((struct vop_lookup_args *)ap, B_TRUE));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_lookup_args {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+};
+#endif
+
+static int
+zfs_cache_lookup(struct vop_lookup_args *ap)
+{
+ zfsvfs_t *zfsvfs;
+
+ zfsvfs = ap->a_dvp->v_mount->mnt_data;
+ if (zfsvfs->z_use_namecache)
+ return (vfs_cache_lookup(ap));
+ else
+ return (zfs_freebsd_lookup(ap, B_FALSE));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_create_args {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+};
+#endif
+
+static int
+zfs_freebsd_create(struct vop_create_args *ap)
+{
+ zfsvfs_t *zfsvfs;
+ struct componentname *cnp = ap->a_cnp;
+ vattr_t *vap = ap->a_vap;
+ znode_t *zp = NULL;
+ int rc, mode;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ vattr_init_mask(vap);
+ mode = vap->va_mode & ALLPERMS;
+ zfsvfs = ap->a_dvp->v_mount->mnt_data;
+ *ap->a_vpp = NULL;
+
+ rc = zfs_create(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap, !EXCL, mode,
+ &zp, cnp->cn_cred, 0 /* flag */, NULL /* vsecattr */);
+ if (rc == 0)
+ *ap->a_vpp = ZTOV(zp);
+ if (zfsvfs->z_use_namecache &&
+ rc == 0 && (cnp->cn_flags & MAKEENTRY) != 0)
+ cache_enter(ap->a_dvp, *ap->a_vpp, cnp);
+
+ return (rc);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_remove_args {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+};
+#endif
+
+static int
+zfs_freebsd_remove(struct vop_remove_args *ap)
+{
+
+ ASSERT(ap->a_cnp->cn_flags & SAVENAME);
+
+ return (zfs_remove_(ap->a_dvp, ap->a_vp, ap->a_cnp->cn_nameptr,
+ ap->a_cnp->cn_cred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_mkdir_args {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+};
+#endif
+
+static int
+zfs_freebsd_mkdir(struct vop_mkdir_args *ap)
+{
+ vattr_t *vap = ap->a_vap;
+ znode_t *zp = NULL;
+ int rc;
+
+ ASSERT(ap->a_cnp->cn_flags & SAVENAME);
+
+ vattr_init_mask(vap);
+ *ap->a_vpp = NULL;
+
+ rc = zfs_mkdir(VTOZ(ap->a_dvp), ap->a_cnp->cn_nameptr, vap, &zp,
+ ap->a_cnp->cn_cred, 0, NULL);
+
+ if (rc == 0)
+ *ap->a_vpp = ZTOV(zp);
+ return (rc);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_rmdir_args {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+};
+#endif
+
+static int
+zfs_freebsd_rmdir(struct vop_rmdir_args *ap)
+{
+ struct componentname *cnp = ap->a_cnp;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ return (zfs_rmdir_(ap->a_dvp, ap->a_vp, cnp->cn_nameptr, cnp->cn_cred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_readdir_args {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ struct ucred *a_cred;
+ int *a_eofflag;
+ int *a_ncookies;
+ ulong_t **a_cookies;
+};
+#endif
+
+static int
+zfs_freebsd_readdir(struct vop_readdir_args *ap)
+{
+
+ return (zfs_readdir(ap->a_vp, ap->a_uio, ap->a_cred, ap->a_eofflag,
+ ap->a_ncookies, ap->a_cookies));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_fsync_args {
+ struct vnode *a_vp;
+ int a_waitfor;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_fsync(struct vop_fsync_args *ap)
+{
+
+ vop_stdfsync(ap);
+ return (zfs_fsync(VTOZ(ap->a_vp), 0, ap->a_td->td_ucred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_getattr_args {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+};
+#endif
+
+static int
+zfs_freebsd_getattr(struct vop_getattr_args *ap)
+{
+ vattr_t *vap = ap->a_vap;
+ xvattr_t xvap;
+ ulong_t fflags = 0;
+ int error;
+
+ xva_init(&xvap);
+ xvap.xva_vattr = *vap;
+ xvap.xva_vattr.va_mask |= AT_XVATTR;
+
+ /* Convert chflags into ZFS-type flags. */
+ /* XXX: what about SF_SETTABLE?. */
+ XVA_SET_REQ(&xvap, XAT_IMMUTABLE);
+ XVA_SET_REQ(&xvap, XAT_APPENDONLY);
+ XVA_SET_REQ(&xvap, XAT_NOUNLINK);
+ XVA_SET_REQ(&xvap, XAT_NODUMP);
+ XVA_SET_REQ(&xvap, XAT_READONLY);
+ XVA_SET_REQ(&xvap, XAT_ARCHIVE);
+ XVA_SET_REQ(&xvap, XAT_SYSTEM);
+ XVA_SET_REQ(&xvap, XAT_HIDDEN);
+ XVA_SET_REQ(&xvap, XAT_REPARSE);
+ XVA_SET_REQ(&xvap, XAT_OFFLINE);
+ XVA_SET_REQ(&xvap, XAT_SPARSE);
+
+ error = zfs_getattr(ap->a_vp, (vattr_t *)&xvap, 0, ap->a_cred);
+ if (error != 0)
+ return (error);
+
+ /* Convert ZFS xattr into chflags. */
+#define FLAG_CHECK(fflag, xflag, xfield) do { \
+ if (XVA_ISSET_RTN(&xvap, (xflag)) && (xfield) != 0) \
+ fflags |= (fflag); \
+} while (0)
+ FLAG_CHECK(SF_IMMUTABLE, XAT_IMMUTABLE,
+ xvap.xva_xoptattrs.xoa_immutable);
+ FLAG_CHECK(SF_APPEND, XAT_APPENDONLY,
+ xvap.xva_xoptattrs.xoa_appendonly);
+ FLAG_CHECK(SF_NOUNLINK, XAT_NOUNLINK,
+ xvap.xva_xoptattrs.xoa_nounlink);
+ FLAG_CHECK(UF_ARCHIVE, XAT_ARCHIVE,
+ xvap.xva_xoptattrs.xoa_archive);
+ FLAG_CHECK(UF_NODUMP, XAT_NODUMP,
+ xvap.xva_xoptattrs.xoa_nodump);
+ FLAG_CHECK(UF_READONLY, XAT_READONLY,
+ xvap.xva_xoptattrs.xoa_readonly);
+ FLAG_CHECK(UF_SYSTEM, XAT_SYSTEM,
+ xvap.xva_xoptattrs.xoa_system);
+ FLAG_CHECK(UF_HIDDEN, XAT_HIDDEN,
+ xvap.xva_xoptattrs.xoa_hidden);
+ FLAG_CHECK(UF_REPARSE, XAT_REPARSE,
+ xvap.xva_xoptattrs.xoa_reparse);
+ FLAG_CHECK(UF_OFFLINE, XAT_OFFLINE,
+ xvap.xva_xoptattrs.xoa_offline);
+ FLAG_CHECK(UF_SPARSE, XAT_SPARSE,
+ xvap.xva_xoptattrs.xoa_sparse);
+
+#undef FLAG_CHECK
+ *vap = xvap.xva_vattr;
+ vap->va_flags = fflags;
+ return (0);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_setattr_args {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+};
+#endif
+
+static int
+zfs_freebsd_setattr(struct vop_setattr_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+ vattr_t *vap = ap->a_vap;
+ cred_t *cred = ap->a_cred;
+ xvattr_t xvap;
+ ulong_t fflags;
+ uint64_t zflags;
+
+ vattr_init_mask(vap);
+ vap->va_mask &= ~AT_NOSET;
+
+ xva_init(&xvap);
+ xvap.xva_vattr = *vap;
+
+ zflags = VTOZ(vp)->z_pflags;
+
+ if (vap->va_flags != VNOVAL) {
+ zfsvfs_t *zfsvfs = VTOZ(vp)->z_zfsvfs;
+ int error;
+
+ if (zfsvfs->z_use_fuids == B_FALSE)
+ return (EOPNOTSUPP);
+
+ fflags = vap->va_flags;
+ /*
+ * XXX KDM
+ * We need to figure out whether it makes sense to allow
+ * UF_REPARSE through, since we don't really have other
+ * facilities to handle reparse points and zfs_setattr()
+ * doesn't currently allow setting that attribute anyway.
+ */
+ if ((fflags & ~(SF_IMMUTABLE|SF_APPEND|SF_NOUNLINK|UF_ARCHIVE|
+ UF_NODUMP|UF_SYSTEM|UF_HIDDEN|UF_READONLY|UF_REPARSE|
+ UF_OFFLINE|UF_SPARSE)) != 0)
+ return (EOPNOTSUPP);
+ /*
+ * Unprivileged processes are not permitted to unset system
+ * flags, or modify flags if any system flags are set.
+ * Privileged non-jail processes may not modify system flags
+ * if securelevel > 0 and any existing system flags are set.
+ * Privileged jail processes behave like privileged non-jail
+ * processes if the PR_ALLOW_CHFLAGS permission bit is set;
+ * otherwise, they behave like unprivileged processes.
+ */
+ if (secpolicy_fs_owner(vp->v_mount, cred) == 0 ||
+ spl_priv_check_cred(cred, PRIV_VFS_SYSFLAGS) == 0) {
+ if (zflags &
+ (ZFS_IMMUTABLE | ZFS_APPENDONLY | ZFS_NOUNLINK)) {
+ error = securelevel_gt(cred, 0);
+ if (error != 0)
+ return (error);
+ }
+ } else {
+ /*
+ * Callers may only modify the file flags on
+ * objects they have VADMIN rights for.
+ */
+ if ((error = VOP_ACCESS(vp, VADMIN, cred,
+ curthread)) != 0)
+ return (error);
+ if (zflags &
+ (ZFS_IMMUTABLE | ZFS_APPENDONLY |
+ ZFS_NOUNLINK)) {
+ return (EPERM);
+ }
+ if (fflags &
+ (SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK)) {
+ return (EPERM);
+ }
+ }
+
+#define FLAG_CHANGE(fflag, zflag, xflag, xfield) do { \
+ if (((fflags & (fflag)) && !(zflags & (zflag))) || \
+ ((zflags & (zflag)) && !(fflags & (fflag)))) { \
+ XVA_SET_REQ(&xvap, (xflag)); \
+ (xfield) = ((fflags & (fflag)) != 0); \
+ } \
+} while (0)
+ /* Convert chflags into ZFS-type flags. */
+ /* XXX: what about SF_SETTABLE?. */
+ FLAG_CHANGE(SF_IMMUTABLE, ZFS_IMMUTABLE, XAT_IMMUTABLE,
+ xvap.xva_xoptattrs.xoa_immutable);
+ FLAG_CHANGE(SF_APPEND, ZFS_APPENDONLY, XAT_APPENDONLY,
+ xvap.xva_xoptattrs.xoa_appendonly);
+ FLAG_CHANGE(SF_NOUNLINK, ZFS_NOUNLINK, XAT_NOUNLINK,
+ xvap.xva_xoptattrs.xoa_nounlink);
+ FLAG_CHANGE(UF_ARCHIVE, ZFS_ARCHIVE, XAT_ARCHIVE,
+ xvap.xva_xoptattrs.xoa_archive);
+ FLAG_CHANGE(UF_NODUMP, ZFS_NODUMP, XAT_NODUMP,
+ xvap.xva_xoptattrs.xoa_nodump);
+ FLAG_CHANGE(UF_READONLY, ZFS_READONLY, XAT_READONLY,
+ xvap.xva_xoptattrs.xoa_readonly);
+ FLAG_CHANGE(UF_SYSTEM, ZFS_SYSTEM, XAT_SYSTEM,
+ xvap.xva_xoptattrs.xoa_system);
+ FLAG_CHANGE(UF_HIDDEN, ZFS_HIDDEN, XAT_HIDDEN,
+ xvap.xva_xoptattrs.xoa_hidden);
+ FLAG_CHANGE(UF_REPARSE, ZFS_REPARSE, XAT_REPARSE,
+ xvap.xva_xoptattrs.xoa_reparse);
+ FLAG_CHANGE(UF_OFFLINE, ZFS_OFFLINE, XAT_OFFLINE,
+ xvap.xva_xoptattrs.xoa_offline);
+ FLAG_CHANGE(UF_SPARSE, ZFS_SPARSE, XAT_SPARSE,
+ xvap.xva_xoptattrs.xoa_sparse);
+#undef FLAG_CHANGE
+ }
+ if (vap->va_birthtime.tv_sec != VNOVAL) {
+ xvap.xva_vattr.va_mask |= AT_XVATTR;
+ XVA_SET_REQ(&xvap, XAT_CREATETIME);
+ }
+ return (zfs_setattr(VTOZ(vp), (vattr_t *)&xvap, 0, cred));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_rename_args {
+ struct vnode *a_fdvp;
+ struct vnode *a_fvp;
+ struct componentname *a_fcnp;
+ struct vnode *a_tdvp;
+ struct vnode *a_tvp;
+ struct componentname *a_tcnp;
+};
+#endif
+
+static int
+zfs_freebsd_rename(struct vop_rename_args *ap)
+{
+ vnode_t *fdvp = ap->a_fdvp;
+ vnode_t *fvp = ap->a_fvp;
+ vnode_t *tdvp = ap->a_tdvp;
+ vnode_t *tvp = ap->a_tvp;
+ int error;
+
+ ASSERT(ap->a_fcnp->cn_flags & (SAVENAME|SAVESTART));
+ ASSERT(ap->a_tcnp->cn_flags & (SAVENAME|SAVESTART));
+
+ error = zfs_rename_(fdvp, &fvp, ap->a_fcnp, tdvp, &tvp,
+ ap->a_tcnp, ap->a_fcnp->cn_cred, 1);
+
+ vrele(fdvp);
+ vrele(fvp);
+ vrele(tdvp);
+ if (tvp != NULL)
+ vrele(tvp);
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_symlink_args {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ char *a_target;
+};
+#endif
+
+static int
+zfs_freebsd_symlink(struct vop_symlink_args *ap)
+{
+ struct componentname *cnp = ap->a_cnp;
+ vattr_t *vap = ap->a_vap;
+ znode_t *zp = NULL;
+ int rc;
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ vap->va_type = VLNK; /* FreeBSD: Syscall only sets va_mode. */
+ vattr_init_mask(vap);
+ *ap->a_vpp = NULL;
+
+ rc = zfs_symlink(VTOZ(ap->a_dvp), cnp->cn_nameptr, vap,
+ ap->a_target, &zp, cnp->cn_cred, 0 /* flags */);
+ if (rc == 0)
+ *ap->a_vpp = ZTOV(zp);
+ return (rc);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_readlink_args {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ struct ucred *a_cred;
+};
+#endif
+
+static int
+zfs_freebsd_readlink(struct vop_readlink_args *ap)
+{
+
+ return (zfs_readlink(ap->a_vp, ap->a_uio, ap->a_cred, NULL));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_link_args {
+ struct vnode *a_tdvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+};
+#endif
+
+static int
+zfs_freebsd_link(struct vop_link_args *ap)
+{
+ struct componentname *cnp = ap->a_cnp;
+ vnode_t *vp = ap->a_vp;
+ vnode_t *tdvp = ap->a_tdvp;
+
+ if (tdvp->v_mount != vp->v_mount)
+ return (EXDEV);
+
+ ASSERT(cnp->cn_flags & SAVENAME);
+
+ return (zfs_link(VTOZ(tdvp), VTOZ(vp),
+ cnp->cn_nameptr, cnp->cn_cred, 0));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_inactive_args {
+ struct vnode *a_vp;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_inactive(struct vop_inactive_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+
+ zfs_inactive(vp, ap->a_td->td_ucred, NULL);
+ return (0);
+}
+
+#if __FreeBSD_version >= 1300042
+#ifndef _SYS_SYSPROTO_H_
+struct vop_need_inactive_args {
+ struct vnode *a_vp;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_need_inactive(struct vop_need_inactive_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ int need;
+
+ if (vn_need_pageq_flush(vp))
+ return (1);
+
+ if (!ZFS_TRYRLOCK_TEARDOWN_INACTIVE(zfsvfs))
+ return (1);
+ need = (zp->z_sa_hdl == NULL || zp->z_unlinked || zp->z_atime_dirty);
+ ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
+
+ return (need);
+}
+#endif
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_reclaim_args {
+ struct vnode *a_vp;
+ struct thread *a_td;
+};
+#endif
+
+static int
+zfs_freebsd_reclaim(struct vop_reclaim_args *ap)
+{
+ vnode_t *vp = ap->a_vp;
+ znode_t *zp = VTOZ(vp);
+ zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+
+ ASSERT(zp != NULL);
+
+#if __FreeBSD_version < 1300042
+ /* Destroy the vm object and flush associated pages. */
+ vnode_destroy_vobject(vp);
+#endif
+ /*
+ * z_teardown_inactive_lock protects from a race with
+ * zfs_znode_dmu_fini in zfsvfs_teardown during
+ * force unmount.
+ */
+ ZFS_RLOCK_TEARDOWN_INACTIVE(zfsvfs);
+ if (zp->z_sa_hdl == NULL)
+ zfs_znode_free(zp);
+ else
+ zfs_zinactive(zp);
+ ZFS_RUNLOCK_TEARDOWN_INACTIVE(zfsvfs);
+
+ vp->v_data = NULL;
+ return (0);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_fid_args {
+ struct vnode *a_vp;
+ struct fid *a_fid;
+};
+#endif
+
+static int
+zfs_freebsd_fid(struct vop_fid_args *ap)
+{
+
+ return (zfs_fid(ap->a_vp, (void *)ap->a_fid, NULL));
+}
+
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_pathconf_args {
+ struct vnode *a_vp;
+ int a_name;
+ register_t *a_retval;
+} *ap;
+#endif
+
+static int
+zfs_freebsd_pathconf(struct vop_pathconf_args *ap)
+{
+ ulong_t val;
+ int error;
+
+ error = zfs_pathconf(ap->a_vp, ap->a_name, &val,
+ curthread->td_ucred, NULL);
+ if (error == 0) {
+ *ap->a_retval = val;
+ return (error);
+ }
+ if (error != EOPNOTSUPP)
+ return (error);
+
+ switch (ap->a_name) {
+ case _PC_NAME_MAX:
+ *ap->a_retval = NAME_MAX;
+ return (0);
+ case _PC_PIPE_BUF:
+ if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) {
+ *ap->a_retval = PIPE_BUF;
+ return (0);
+ }
+ return (EINVAL);
+ default:
+ return (vop_stdpathconf(ap));
+ }
+}
+
+/*
+ * FreeBSD's extended attributes namespace defines file name prefix for ZFS'
+ * extended attribute name:
+ *
+ * NAMESPACE PREFIX
+ * system freebsd:system:
+ * user (none, can be used to access ZFS fsattr(5) attributes
+ * created on Solaris)
+ */
+static int
+zfs_create_attrname(int attrnamespace, const char *name, char *attrname,
+ size_t size)
+{
+ const char *namespace, *prefix, *suffix;
+
+ /* We don't allow '/' character in attribute name. */
+ if (strchr(name, '/') != NULL)
+ return (EINVAL);
+ /* We don't allow attribute names that start with "freebsd:" string. */
+ if (strncmp(name, "freebsd:", 8) == 0)
+ return (EINVAL);
+
+ bzero(attrname, size);
+
+ switch (attrnamespace) {
+ case EXTATTR_NAMESPACE_USER:
+#if 0
+ prefix = "freebsd:";
+ namespace = EXTATTR_NAMESPACE_USER_STRING;
+ suffix = ":";
+#else
+ /*
+ * This is the default namespace by which we can access all
+ * attributes created on Solaris.
+ */
+ prefix = namespace = suffix = "";
+#endif
+ break;
+ case EXTATTR_NAMESPACE_SYSTEM:
+ prefix = "freebsd:";
+ namespace = EXTATTR_NAMESPACE_SYSTEM_STRING;
+ suffix = ":";
+ break;
+ case EXTATTR_NAMESPACE_EMPTY:
+ default:
+ return (EINVAL);
+ }
+ if (snprintf(attrname, size, "%s%s%s%s", prefix, namespace, suffix,
+ name) >= size) {
+ return (ENAMETOOLONG);
+ }
+ return (0);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_getextattr {
+ IN struct vnode *a_vp;
+ IN int a_attrnamespace;
+ IN const char *a_name;
+ INOUT struct uio *a_uio;
+ OUT size_t *a_size;
+ IN struct ucred *a_cred;
+ IN struct thread *a_td;
+};
+#endif
+
+/*
+ * Vnode operating to retrieve a named extended attribute.
+ */
+static int
+zfs_getextattr(struct vop_getextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ struct vattr va;
+ vnode_t *xvp = NULL, *vp;
+ int error, flags;
+
+ /*
+ * If the xattr property is off, refuse the request.
+ */
+ if (!(zfsvfs->z_flags & ZSB_XATTR)) {
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
+ ap->a_cred, ap->a_td, VREAD);
+ if (error != 0)
+ return (error);
+
+ error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
+ sizeof (attrname));
+ if (error != 0)
+ return (error);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ flags = FREAD;
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
+ xvp, td);
+ error = vn_open_cred(&nd, &flags, 0, VN_OPEN_INVFS, ap->a_cred, NULL);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ if (error == ENOENT)
+ error = ENOATTR;
+ return (error);
+ }
+
+ if (ap->a_size != NULL) {
+ error = VOP_GETATTR(vp, &va, ap->a_cred);
+ if (error == 0)
+ *ap->a_size = (size_t)va.va_size;
+ } else if (ap->a_uio != NULL)
+ error = VOP_READ(vp, ap->a_uio, IO_UNIT, ap->a_cred);
+
+ VOP_UNLOCK1(vp);
+ vn_close(vp, flags, ap->a_cred, td);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_deleteextattr {
+ IN struct vnode *a_vp;
+ IN int a_attrnamespace;
+ IN const char *a_name;
+ IN struct ucred *a_cred;
+ IN struct thread *a_td;
+};
+#endif
+
+/*
+ * Vnode operation to remove a named attribute.
+ */
+static int
+zfs_deleteextattr(struct vop_deleteextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ vnode_t *xvp = NULL, *vp;
+ int error;
+
+ /*
+ * If the xattr property is off, refuse the request.
+ */
+ if (!(zfsvfs->z_flags & ZSB_XATTR)) {
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
+ ap->a_cred, ap->a_td, VWRITE);
+ if (error != 0)
+ return (error);
+
+ error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
+ sizeof (attrname));
+ if (error != 0)
+ return (error);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ NDINIT_ATVP(&nd, DELETE, NOFOLLOW | LOCKPARENT | LOCKLEAF,
+ UIO_SYSSPACE, attrname, xvp, td);
+ error = namei(&nd);
+ vp = nd.ni_vp;
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error == ENOENT)
+ error = ENOATTR;
+ return (error);
+ }
+
+ error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+
+ vput(nd.ni_dvp);
+ if (vp == nd.ni_dvp)
+ vrele(vp);
+ else
+ vput(vp);
+ ZFS_EXIT(zfsvfs);
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_setextattr {
+ IN struct vnode *a_vp;
+ IN int a_attrnamespace;
+ IN const char *a_name;
+ INOUT struct uio *a_uio;
+ IN struct ucred *a_cred;
+ IN struct thread *a_td;
+};
+#endif
+
+/*
+ * Vnode operation to set a named attribute.
+ */
+static int
+zfs_setextattr(struct vop_setextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrname[255];
+ struct vattr va;
+ vnode_t *xvp = NULL, *vp;
+ int error, flags;
+
+ /*
+ * If the xattr property is off, refuse the request.
+ */
+ if (!(zfsvfs->z_flags & ZSB_XATTR)) {
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
+ ap->a_cred, ap->a_td, VWRITE);
+ if (error != 0)
+ return (error);
+ error = zfs_create_attrname(ap->a_attrnamespace, ap->a_name, attrname,
+ sizeof (attrname));
+ if (error != 0)
+ return (error);
+
+ ZFS_ENTER(zfsvfs);
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR | CREATE_XATTR_DIR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ flags = FFLAGS(O_WRONLY | O_CREAT);
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, attrname,
+ xvp, td);
+ error = vn_open_cred(&nd, &flags, 0600, VN_OPEN_INVFS, ap->a_cred,
+ NULL);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ VATTR_NULL(&va);
+ va.va_size = 0;
+ error = VOP_SETATTR(vp, &va, ap->a_cred);
+ if (error == 0)
+ VOP_WRITE(vp, ap->a_uio, IO_UNIT, ap->a_cred);
+
+ VOP_UNLOCK1(vp);
+ vn_close(vp, flags, ap->a_cred, td);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_listextattr {
+ IN struct vnode *a_vp;
+ IN int a_attrnamespace;
+ INOUT struct uio *a_uio;
+ OUT size_t *a_size;
+ IN struct ucred *a_cred;
+ IN struct thread *a_td;
+};
+#endif
+
+/*
+ * Vnode operation to retrieve extended attributes on a vnode.
+ */
+static int
+zfs_listextattr(struct vop_listextattr_args *ap)
+{
+ zfsvfs_t *zfsvfs = VTOZ(ap->a_vp)->z_zfsvfs;
+ struct thread *td = ap->a_td;
+ struct nameidata nd;
+ char attrprefix[16];
+ uint8_t dirbuf[sizeof (struct dirent)];
+ struct dirent *dp;
+ struct iovec aiov;
+ struct uio auio, *uio = ap->a_uio;
+ size_t *sizep = ap->a_size;
+ size_t plen;
+ vnode_t *xvp = NULL, *vp;
+ int done, error, eof, pos;
+
+ /*
+ * If the xattr property is off, refuse the request.
+ */
+ if (!(zfsvfs->z_flags & ZSB_XATTR)) {
+ return (SET_ERROR(EOPNOTSUPP));
+ }
+
+ error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
+ ap->a_cred, ap->a_td, VREAD);
+ if (error != 0)
+ return (error);
+
+ error = zfs_create_attrname(ap->a_attrnamespace, "", attrprefix,
+ sizeof (attrprefix));
+ if (error != 0)
+ return (error);
+ plen = strlen(attrprefix);
+
+ ZFS_ENTER(zfsvfs);
+
+ if (sizep != NULL)
+ *sizep = 0;
+
+ error = zfs_lookup(ap->a_vp, NULL, &xvp, NULL, 0, ap->a_cred, td,
+ LOOKUP_XATTR, B_FALSE);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ /*
+ * ENOATTR means that the EA directory does not yet exist,
+ * i.e. there are no extended attributes there.
+ */
+ if (error == ENOATTR)
+ error = 0;
+ return (error);
+ }
+
+ NDINIT_ATVP(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKSHARED,
+ UIO_SYSSPACE, ".", xvp, td);
+ error = namei(&nd);
+ vp = nd.ni_vp;
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ if (error != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ auio.uio_iov = &aiov;
+ auio.uio_iovcnt = 1;
+ auio.uio_segflg = UIO_SYSSPACE;
+ auio.uio_td = td;
+ auio.uio_rw = UIO_READ;
+ auio.uio_offset = 0;
+
+ do {
+ uint8_t nlen;
+
+ aiov.iov_base = (void *)dirbuf;
+ aiov.iov_len = sizeof (dirbuf);
+ auio.uio_resid = sizeof (dirbuf);
+ error = VOP_READDIR(vp, &auio, ap->a_cred, &eof, NULL, NULL);
+ done = sizeof (dirbuf) - auio.uio_resid;
+ if (error != 0)
+ break;
+ for (pos = 0; pos < done; ) {
+ dp = (struct dirent *)(dirbuf + pos);
+ pos += dp->d_reclen;
+ /*
+ * XXX: Temporarily we also accept DT_UNKNOWN, as this
+ * is what we get when attribute was created on Solaris.
+ */
+ if (dp->d_type != DT_REG && dp->d_type != DT_UNKNOWN)
+ continue;
+ if (plen == 0 &&
+ strncmp(dp->d_name, "freebsd:", 8) == 0)
+ continue;
+ else if (strncmp(dp->d_name, attrprefix, plen) != 0)
+ continue;
+ nlen = dp->d_namlen - plen;
+ if (sizep != NULL)
+ *sizep += 1 + nlen;
+ else if (uio != NULL) {
+ /*
+ * Format of extattr name entry is one byte for
+ * length and the rest for name.
+ */
+ error = uiomove(&nlen, 1, uio->uio_rw, uio);
+ if (error == 0) {
+ error = uiomove(dp->d_name + plen, nlen,
+ uio->uio_rw, uio);
+ }
+ if (error != 0)
+ break;
+ }
+ }
+ } while (!eof && error == 0);
+
+ vput(vp);
+ ZFS_EXIT(zfsvfs);
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_getacl_args {
+ struct vnode *vp;
+ acl_type_t type;
+ struct acl *aclp;
+ struct ucred *cred;
+ struct thread *td;
+};
+#endif
+
+static int
+zfs_freebsd_getacl(struct vop_getacl_args *ap)
+{
+ int error;
+ vsecattr_t vsecattr;
+
+ if (ap->a_type != ACL_TYPE_NFS4)
+ return (EINVAL);
+
+ vsecattr.vsa_mask = VSA_ACE | VSA_ACECNT;
+ if ((error = zfs_getsecattr(VTOZ(ap->a_vp),
+ &vsecattr, 0, ap->a_cred)))
+ return (error);
+
+ error = acl_from_aces(ap->a_aclp, vsecattr.vsa_aclentp,
+ vsecattr.vsa_aclcnt);
+ if (vsecattr.vsa_aclentp != NULL)
+ kmem_free(vsecattr.vsa_aclentp, vsecattr.vsa_aclentsz);
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_setacl_args {
+ struct vnode *vp;
+ acl_type_t type;
+ struct acl *aclp;
+ struct ucred *cred;
+ struct thread *td;
+};
+#endif
+
+static int
+zfs_freebsd_setacl(struct vop_setacl_args *ap)
+{
+ int error;
+ vsecattr_t vsecattr;
+ int aclbsize; /* size of acl list in bytes */
+ aclent_t *aaclp;
+
+ if (ap->a_type != ACL_TYPE_NFS4)
+ return (EINVAL);
+
+ if (ap->a_aclp == NULL)
+ return (EINVAL);
+
+ if (ap->a_aclp->acl_cnt < 1 || ap->a_aclp->acl_cnt > MAX_ACL_ENTRIES)
+ return (EINVAL);
+
+ /*
+ * With NFSv4 ACLs, chmod(2) may need to add additional entries,
+ * splitting every entry into two and appending "canonical six"
+ * entries at the end. Don't allow for setting an ACL that would
+ * cause chmod(2) to run out of ACL entries.
+ */
+ if (ap->a_aclp->acl_cnt * 2 + 6 > ACL_MAX_ENTRIES)
+ return (ENOSPC);
+
+ error = acl_nfs4_check(ap->a_aclp, ap->a_vp->v_type == VDIR);
+ if (error != 0)
+ return (error);
+
+ vsecattr.vsa_mask = VSA_ACE;
+ aclbsize = ap->a_aclp->acl_cnt * sizeof (ace_t);
+ vsecattr.vsa_aclentp = kmem_alloc(aclbsize, KM_SLEEP);
+ aaclp = vsecattr.vsa_aclentp;
+ vsecattr.vsa_aclentsz = aclbsize;
+
+ aces_from_acl(vsecattr.vsa_aclentp, &vsecattr.vsa_aclcnt, ap->a_aclp);
+ error = zfs_setsecattr(VTOZ(ap->a_vp), &vsecattr, 0, ap->a_cred);
+ kmem_free(aaclp, aclbsize);
+
+ return (error);
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct vop_aclcheck_args {
+ struct vnode *vp;
+ acl_type_t type;
+ struct acl *aclp;
+ struct ucred *cred;
+ struct thread *td;
+};
+#endif
+
+static int
+zfs_freebsd_aclcheck(struct vop_aclcheck_args *ap)
+{
+
+ return (EOPNOTSUPP);
+}
+
+static int
+zfs_vptocnp(struct vop_vptocnp_args *ap)
+{
+ vnode_t *covered_vp;
+ vnode_t *vp = ap->a_vp;
+ zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
+ znode_t *zp = VTOZ(vp);
+ int ltype;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ /*
+ * If we are a snapshot mounted under .zfs, run the operation
+ * on the covered vnode.
+ */
+ if (zp->z_id != zfsvfs->z_root || zfsvfs->z_parent == zfsvfs) {
+ char name[MAXNAMLEN + 1];
+ znode_t *dzp;
+ size_t len;
+
+ error = zfs_znode_parent_and_name(zp, &dzp, name);
+ if (error == 0) {
+ len = strlen(name);
+ if (*ap->a_buflen < len)
+ error = SET_ERROR(ENOMEM);
+ }
+ if (error == 0) {
+ *ap->a_buflen -= len;
+ bcopy(name, ap->a_buf + *ap->a_buflen, len);
+ *ap->a_vpp = ZTOV(dzp);
+ }
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ ZFS_EXIT(zfsvfs);
+
+ covered_vp = vp->v_mount->mnt_vnodecovered;
+#if __FreeBSD_version >= 1300045
+ enum vgetstate vs = vget_prep(covered_vp);
+#else
+ vhold(covered_vp);
+#endif
+ ltype = VOP_ISLOCKED(vp);
+ VOP_UNLOCK1(vp);
+#if __FreeBSD_version >= 1300045
+ error = vget_finish(covered_vp, LK_SHARED, vs);
+#else
+ error = vget(covered_vp, LK_SHARED | LK_VNHELD, curthread);
+#endif
+ if (error == 0) {
+ error = VOP_VPTOCNP(covered_vp, ap->a_vpp, ap->a_cred,
+ ap->a_buf, ap->a_buflen);
+ vput(covered_vp);
+ }
+ vn_lock(vp, ltype | LK_RETRY);
+ if (VN_IS_DOOMED(vp))
+ error = SET_ERROR(ENOENT);
+ return (error);
+}
+
+#ifdef DIAGNOSTIC
+#ifndef _SYS_SYSPROTO_H_
+struct vop_lock1_args {
+ struct vnode *a_vp;
+ int a_flags;
+ char *file;
+ int line;
+};
+#endif
+
+static int
+zfs_lock(struct vop_lock1_args *ap)
+{
+ vnode_t *vp;
+ znode_t *zp;
+ int err;
+
+#if __FreeBSD_version >= 1300064
+ err = vop_lock(ap);
+#else
+ err = vop_stdlock(ap);
+#endif
+ if (err == 0 && (ap->a_flags & LK_NOWAIT) == 0) {
+ vp = ap->a_vp;
+ zp = vp->v_data;
+ if (vp->v_mount != NULL && !VN_IS_DOOMED(vp) &&
+ zp != NULL && (zp->z_pflags & ZFS_XATTR) == 0)
+ VERIFY(!RRM_LOCK_HELD(&zp->z_zfsvfs->z_teardown_lock));
+ }
+ return (err);
+}
+#endif
+
+struct vop_vector zfs_vnodeops;
+struct vop_vector zfs_fifoops;
+struct vop_vector zfs_shareops;
+
+struct vop_vector zfs_vnodeops = {
+ .vop_default = &default_vnodeops,
+ .vop_inactive = zfs_freebsd_inactive,
+#if __FreeBSD_version >= 1300042
+ .vop_need_inactive = zfs_freebsd_need_inactive,
+#endif
+ .vop_reclaim = zfs_freebsd_reclaim,
+#if __FreeBSD_version >= 1300102
+ .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec,
+#endif
+ .vop_access = zfs_freebsd_access,
+ .vop_allocate = VOP_EINVAL,
+ .vop_lookup = zfs_cache_lookup,
+ .vop_cachedlookup = zfs_freebsd_cachedlookup,
+ .vop_getattr = zfs_freebsd_getattr,
+ .vop_setattr = zfs_freebsd_setattr,
+ .vop_create = zfs_freebsd_create,
+ .vop_mknod = (vop_mknod_t *)zfs_freebsd_create,
+ .vop_mkdir = zfs_freebsd_mkdir,
+ .vop_readdir = zfs_freebsd_readdir,
+ .vop_fsync = zfs_freebsd_fsync,
+ .vop_open = zfs_freebsd_open,
+ .vop_close = zfs_freebsd_close,
+ .vop_rmdir = zfs_freebsd_rmdir,
+ .vop_ioctl = zfs_freebsd_ioctl,
+ .vop_link = zfs_freebsd_link,
+ .vop_symlink = zfs_freebsd_symlink,
+ .vop_readlink = zfs_freebsd_readlink,
+ .vop_read = zfs_freebsd_read,
+ .vop_write = zfs_freebsd_write,
+ .vop_remove = zfs_freebsd_remove,
+ .vop_rename = zfs_freebsd_rename,
+ .vop_pathconf = zfs_freebsd_pathconf,
+ .vop_bmap = zfs_freebsd_bmap,
+ .vop_fid = zfs_freebsd_fid,
+ .vop_getextattr = zfs_getextattr,
+ .vop_deleteextattr = zfs_deleteextattr,
+ .vop_setextattr = zfs_setextattr,
+ .vop_listextattr = zfs_listextattr,
+ .vop_getacl = zfs_freebsd_getacl,
+ .vop_setacl = zfs_freebsd_setacl,
+ .vop_aclcheck = zfs_freebsd_aclcheck,
+ .vop_getpages = zfs_freebsd_getpages,
+ .vop_putpages = zfs_freebsd_putpages,
+ .vop_vptocnp = zfs_vptocnp,
+#if __FreeBSD_version >= 1300064
+#ifdef DIAGNOSTIC
+ .vop_lock1 = zfs_lock,
+#else
+ .vop_lock1 = vop_lock,
+#endif
+ .vop_unlock = vop_unlock,
+ .vop_islocked = vop_islocked,
+#else
+#ifdef DIAGNOSTIC
+ .vop_lock1 = zfs_lock,
+#endif
+#endif
+};
+VFS_VOP_VECTOR_REGISTER(zfs_vnodeops);
+
+struct vop_vector zfs_fifoops = {
+ .vop_default = &fifo_specops,
+ .vop_fsync = zfs_freebsd_fsync,
+#if __FreeBSD_version >= 1300102
+ .vop_fplookup_vexec = zfs_freebsd_fplookup_vexec,
+#endif
+ .vop_access = zfs_freebsd_access,
+ .vop_getattr = zfs_freebsd_getattr,
+ .vop_inactive = zfs_freebsd_inactive,
+ .vop_read = VOP_PANIC,
+ .vop_reclaim = zfs_freebsd_reclaim,
+ .vop_setattr = zfs_freebsd_setattr,
+ .vop_write = VOP_PANIC,
+ .vop_pathconf = zfs_freebsd_pathconf,
+ .vop_fid = zfs_freebsd_fid,
+ .vop_getacl = zfs_freebsd_getacl,
+ .vop_setacl = zfs_freebsd_setacl,
+ .vop_aclcheck = zfs_freebsd_aclcheck,
+};
+VFS_VOP_VECTOR_REGISTER(zfs_fifoops);
+
+/*
+ * special share hidden files vnode operations template
+ */
+struct vop_vector zfs_shareops = {
+ .vop_default = &default_vnodeops,
+#if __FreeBSD_version >= 1300121
+ .vop_fplookup_vexec = VOP_EAGAIN,
+#endif
+ .vop_access = zfs_freebsd_access,
+ .vop_inactive = zfs_freebsd_inactive,
+ .vop_reclaim = zfs_freebsd_reclaim,
+ .vop_fid = zfs_freebsd_fid,
+ .vop_pathconf = zfs_freebsd_pathconf,
+};
+VFS_VOP_VECTOR_REGISTER(zfs_shareops);
return (error);
}
+
+void
+zfs_inode_update(znode_t *zp)
+{
+ vm_object_t object;
+
+ if ((object = ZTOV(zp)->v_object) == NULL ||
+ zp->z_size == object->un_pager.vnp.vnp_size)
+ return;
+
+ vnode_pager_setsize(ZTOV(zp), zp->z_size);
+}
+
+
#ifdef _KERNEL
int
zfs_znode_parent_and_name(znode_t *zp, znode_t **dzpp, char *buf)
$(MODULE)-objs += ../os/linux/zfs/zfs_ioctl_os.o
$(MODULE)-objs += ../os/linux/zfs/zfs_sysfs.o
$(MODULE)-objs += ../os/linux/zfs/zfs_vfsops.o
-$(MODULE)-objs += ../os/linux/zfs/zfs_vnops.o
+$(MODULE)-objs += ../os/linux/zfs/zfs_vnops_os.o
$(MODULE)-objs += ../os/linux/zfs/zfs_znode.o
$(MODULE)-objs += ../os/linux/zfs/zio_crypt.o
$(MODULE)-objs += ../os/linux/zfs/zpl_ctldir.o
* Enforced in the Linux VFS.
*/
int
-secpolicy_vnode_setid_retain(const cred_t *cr, boolean_t issuidroot)
+secpolicy_vnode_setid_retain(struct znode *zp __maybe_unused, const cred_t *cr,
+ boolean_t issuidroot)
{
return (priv_policy_user(cr, CAP_FSETID, EPERM));
}
secpolicy_setid_clear(vattr_t *vap, cred_t *cr)
{
if ((vap->va_mode & (S_ISUID | S_ISGID)) != 0 &&
- secpolicy_vnode_setid_retain(cr,
+ secpolicy_vnode_setid_retain(NULL, cr,
(vap->va_mode & S_ISUID) != 0 &&
(vap->va_mask & AT_UID) != 0 && vap->va_uid == 0) != 0) {
vap->va_mask |= AT_MODE;
+++ /dev/null
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-
-/*
- * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
- * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
- * Copyright 2017 Nexenta Systems, Inc.
- */
-
-/* Portions Copyright 2007 Jeremy Teo */
-/* Portions Copyright 2010 Robert Milkowski */
-
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/sysmacros.h>
-#include <sys/vfs.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/kmem.h>
-#include <sys/taskq.h>
-#include <sys/uio.h>
-#include <sys/vmsystm.h>
-#include <sys/atomic.h>
-#include <sys/pathname.h>
-#include <sys/cmn_err.h>
-#include <sys/errno.h>
-#include <sys/zfs_dir.h>
-#include <sys/zfs_acl.h>
-#include <sys/zfs_ioctl.h>
-#include <sys/fs/zfs.h>
-#include <sys/dmu.h>
-#include <sys/dmu_objset.h>
-#include <sys/spa.h>
-#include <sys/txg.h>
-#include <sys/dbuf.h>
-#include <sys/zap.h>
-#include <sys/sa.h>
-#include <sys/policy.h>
-#include <sys/sunddi.h>
-#include <sys/sid.h>
-#include <sys/zfs_ctldir.h>
-#include <sys/zfs_fuid.h>
-#include <sys/zfs_quota.h>
-#include <sys/zfs_sa.h>
-#include <sys/zfs_vnops.h>
-#include <sys/zfs_rlock.h>
-#include <sys/cred.h>
-#include <sys/zpl.h>
-#include <sys/zil.h>
-#include <sys/sa_impl.h>
-
-/*
- * Programming rules.
- *
- * Each vnode op performs some logical unit of work. To do this, the ZPL must
- * properly lock its in-core state, create a DMU transaction, do the work,
- * record this work in the intent log (ZIL), commit the DMU transaction,
- * and wait for the intent log to commit if it is a synchronous operation.
- * Moreover, the vnode ops must work in both normal and log replay context.
- * The ordering of events is important to avoid deadlocks and references
- * to freed memory. The example below illustrates the following Big Rules:
- *
- * (1) A check must be made in each zfs thread for a mounted file system.
- * This is done avoiding races using ZFS_ENTER(zfsvfs).
- * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
- * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
- * can return EIO from the calling function.
- *
- * (2) zrele() should always be the last thing except for zil_commit()
- * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
- * First, if it's the last reference, the vnode/znode
- * can be freed, so the zp may point to freed memory. Second, the last
- * reference will call zfs_zinactive(), which may induce a lot of work --
- * pushing cached pages (which acquires range locks) and syncing out
- * cached atime changes. Third, zfs_zinactive() may require a new tx,
- * which could deadlock the system if you were already holding one.
- * If you must call zrele() within a tx then use zfs_zrele_async().
- *
- * (3) All range locks must be grabbed before calling dmu_tx_assign(),
- * as they can span dmu_tx_assign() calls.
- *
- * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to
- * dmu_tx_assign(). This is critical because we don't want to block
- * while holding locks.
- *
- * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This
- * reduces lock contention and CPU usage when we must wait (note that if
- * throughput is constrained by the storage, nearly every transaction
- * must wait).
- *
- * Note, in particular, that if a lock is sometimes acquired before
- * the tx assigns, and sometimes after (e.g. z_lock), then failing
- * to use a non-blocking assign can deadlock the system. The scenario:
- *
- * Thread A has grabbed a lock before calling dmu_tx_assign().
- * Thread B is in an already-assigned tx, and blocks for this lock.
- * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
- * forever, because the previous txg can't quiesce until B's tx commits.
- *
- * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
- * then drop all locks, call dmu_tx_wait(), and try again. On subsequent
- * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT,
- * to indicate that this operation has already called dmu_tx_wait().
- * This will ensure that we don't retry forever, waiting a short bit
- * each time.
- *
- * (5) If the operation succeeded, generate the intent log entry for it
- * before dropping locks. This ensures that the ordering of events
- * in the intent log matches the order in which they actually occurred.
- * During ZIL replay the zfs_log_* functions will update the sequence
- * number to indicate the zil transaction has replayed.
- *
- * (6) At the end of each vnode op, the DMU tx must always commit,
- * regardless of whether there were any errors.
- *
- * (7) After dropping all locks, invoke zil_commit(zilog, foid)
- * to ensure that synchronous semantics are provided when necessary.
- *
- * In general, this is how things should be ordered in each vnode op:
- *
- * ZFS_ENTER(zfsvfs); // exit if unmounted
- * top:
- * zfs_dirent_lock(&dl, ...) // lock directory entry (may igrab())
- * rw_enter(...); // grab any other locks you need
- * tx = dmu_tx_create(...); // get DMU tx
- * dmu_tx_hold_*(); // hold each object you might modify
- * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- * if (error) {
- * rw_exit(...); // drop locks
- * zfs_dirent_unlock(dl); // unlock directory entry
- * zrele(...); // release held znodes
- * if (error == ERESTART) {
- * waited = B_TRUE;
- * dmu_tx_wait(tx);
- * dmu_tx_abort(tx);
- * goto top;
- * }
- * dmu_tx_abort(tx); // abort DMU tx
- * ZFS_EXIT(zfsvfs); // finished in zfs
- * return (error); // really out of space
- * }
- * error = do_real_work(); // do whatever this VOP does
- * if (error == 0)
- * zfs_log_*(...); // on success, make ZIL entry
- * dmu_tx_commit(tx); // commit DMU tx -- error or not
- * rw_exit(...); // drop locks
- * zfs_dirent_unlock(dl); // unlock directory entry
- * zrele(...); // release held znodes
- * zil_commit(zilog, foid); // synchronous when necessary
- * ZFS_EXIT(zfsvfs); // finished in zfs
- * return (error); // done, report error
- */
-
-/*
- * Virus scanning is unsupported. It would be possible to add a hook
- * here to performance the required virus scan. This could be done
- * entirely in the kernel or potentially as an update to invoke a
- * scanning utility.
- */
-static int
-zfs_vscan(struct inode *ip, cred_t *cr, int async)
-{
- return (0);
-}
-
-/* ARGSUSED */
-int
-zfs_open(struct inode *ip, int mode, int flag, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /* Honor ZFS_APPENDONLY file attribute */
- if ((mode & FMODE_WRITE) && (zp->z_pflags & ZFS_APPENDONLY) &&
- ((flag & O_APPEND) == 0)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- /* Virus scan eligible files on open */
- if (!zfs_has_ctldir(zp) && zfsvfs->z_vscan && S_ISREG(ip->i_mode) &&
- !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) {
- if (zfs_vscan(ip, cr, 0) != 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EACCES));
- }
- }
-
- /* Keep a count of the synchronous opens in the znode */
- if (flag & O_SYNC)
- atomic_inc_32(&zp->z_sync_cnt);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/* ARGSUSED */
-int
-zfs_close(struct inode *ip, int flag, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- /* Decrement the synchronous opens in the znode */
- if (flag & O_SYNC)
- atomic_dec_32(&zp->z_sync_cnt);
-
- if (!zfs_has_ctldir(zp) && zfsvfs->z_vscan && S_ISREG(ip->i_mode) &&
- !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0)
- VERIFY(zfs_vscan(ip, cr, 1) == 0);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-#if defined(SEEK_HOLE) && defined(SEEK_DATA)
-/*
- * Lseek support for finding holes (cmd == SEEK_HOLE) and
- * data (cmd == SEEK_DATA). "off" is an in/out parameter.
- */
-static int
-zfs_holey_common(struct inode *ip, int cmd, loff_t *off)
-{
- znode_t *zp = ITOZ(ip);
- uint64_t noff = (uint64_t)*off; /* new offset */
- uint64_t file_sz;
- int error;
- boolean_t hole;
-
- file_sz = zp->z_size;
- if (noff >= file_sz) {
- return (SET_ERROR(ENXIO));
- }
-
- if (cmd == SEEK_HOLE)
- hole = B_TRUE;
- else
- hole = B_FALSE;
-
- error = dmu_offset_next(ZTOZSB(zp)->z_os, zp->z_id, hole, &noff);
-
- if (error == ESRCH)
- return (SET_ERROR(ENXIO));
-
- /* file was dirty, so fall back to using generic logic */
- if (error == EBUSY) {
- if (hole)
- *off = file_sz;
-
- return (0);
- }
-
- /*
- * We could find a hole that begins after the logical end-of-file,
- * because dmu_offset_next() only works on whole blocks. If the
- * EOF falls mid-block, then indicate that the "virtual hole"
- * at the end of the file begins at the logical EOF, rather than
- * at the end of the last block.
- */
- if (noff > file_sz) {
- ASSERT(hole);
- noff = file_sz;
- }
-
- if (noff < *off)
- return (error);
- *off = noff;
- return (error);
-}
-
-int
-zfs_holey(struct inode *ip, int cmd, loff_t *off)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- error = zfs_holey_common(ip, cmd, off);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-#endif /* SEEK_HOLE && SEEK_DATA */
-
-#if defined(_KERNEL)
-/*
- * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages. What this means:
- *
- * On Write: If we find a memory mapped page, we write to *both*
- * the page and the dmu buffer.
- */
-static void
-update_pages(struct inode *ip, int64_t start, int len,
- objset_t *os, uint64_t oid)
-{
- struct address_space *mp = ip->i_mapping;
- struct page *pp;
- uint64_t nbytes;
- int64_t off;
- void *pb;
-
- off = start & (PAGE_SIZE-1);
- for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
- nbytes = MIN(PAGE_SIZE - off, len);
-
- pp = find_lock_page(mp, start >> PAGE_SHIFT);
- if (pp) {
- if (mapping_writably_mapped(mp))
- flush_dcache_page(pp);
-
- pb = kmap(pp);
- (void) dmu_read(os, oid, start+off, nbytes, pb+off,
- DMU_READ_PREFETCH);
- kunmap(pp);
-
- if (mapping_writably_mapped(mp))
- flush_dcache_page(pp);
-
- mark_page_accessed(pp);
- SetPageUptodate(pp);
- ClearPageError(pp);
- unlock_page(pp);
- put_page(pp);
- }
-
- len -= nbytes;
- off = 0;
- }
-}
-
-/*
- * When a file is memory mapped, we must keep the IO data synchronized
- * between the DMU cache and the memory mapped pages. What this means:
- *
- * On Read: We "read" preferentially from memory mapped pages,
- * else we default from the dmu buffer.
- *
- * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
- * the file is memory mapped.
- */
-static int
-mappedread(struct inode *ip, int nbytes, uio_t *uio)
-{
- struct address_space *mp = ip->i_mapping;
- struct page *pp;
- znode_t *zp = ITOZ(ip);
- int64_t start, off;
- uint64_t bytes;
- int len = nbytes;
- int error = 0;
- void *pb;
-
- start = uio->uio_loffset;
- off = start & (PAGE_SIZE-1);
- for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
- bytes = MIN(PAGE_SIZE - off, len);
-
- pp = find_lock_page(mp, start >> PAGE_SHIFT);
- if (pp) {
- ASSERT(PageUptodate(pp));
- unlock_page(pp);
-
- pb = kmap(pp);
- error = uiomove(pb + off, bytes, UIO_READ, uio);
- kunmap(pp);
-
- if (mapping_writably_mapped(mp))
- flush_dcache_page(pp);
-
- mark_page_accessed(pp);
- put_page(pp);
- } else {
- error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, bytes);
- }
-
- len -= bytes;
- off = 0;
- if (error)
- break;
- }
- return (error);
-}
-#endif /* _KERNEL */
-
-unsigned long zfs_read_chunk_size = 1024 * 1024; /* Tunable */
-unsigned long zfs_delete_blocks = DMU_MAX_DELETEBLKCNT;
-
-/*
- * Read bytes from specified file into supplied buffer.
- *
- * IN: ip - inode of file to be read from.
- * uio - structure supplying read location, range info,
- * and return buffer.
- * ioflag - O_SYNC flags; used to provide FRSYNC semantics.
- * O_DIRECT flag; used to bypass page cache.
- * cr - credentials of caller.
- *
- * OUT: uio - updated offset and range, buffer filled.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Side Effects:
- * inode - atime updated if byte count > 0
- */
-/* ARGSUSED */
-int
-zfs_read(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
-{
- int error = 0;
- boolean_t frsync = B_FALSE;
-
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (zp->z_pflags & ZFS_AV_QUARANTINED) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EACCES));
- }
-
- /*
- * Validate file offset
- */
- if (uio->uio_loffset < (offset_t)0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Fasttrack empty reads
- */
- if (uio->uio_resid == 0) {
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
-#ifdef FRSYNC
- /*
- * If we're in FRSYNC mode, sync out this znode before reading it.
- * Only do this for non-snapshots.
- *
- * Some platforms do not support FRSYNC and instead map it
- * to O_SYNC, which results in unnecessary calls to zil_commit. We
- * only honor FRSYNC requests on platforms which support it.
- */
- frsync = !!(ioflag & FRSYNC);
-#endif
- if (zfsvfs->z_log &&
- (frsync || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS))
- zil_commit(zfsvfs->z_log, zp->z_id);
-
- /*
- * Lock the range against changes.
- */
- zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock,
- uio->uio_loffset, uio->uio_resid, RL_READER);
-
- /*
- * If we are reading past end-of-file we can skip
- * to the end; but we might still need to set atime.
- */
- if (uio->uio_loffset >= zp->z_size) {
- error = 0;
- goto out;
- }
-
- ASSERT(uio->uio_loffset < zp->z_size);
- ssize_t n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset);
- ssize_t start_resid = n;
-
-#ifdef HAVE_UIO_ZEROCOPY
- xuio_t *xuio = NULL;
- if ((uio->uio_extflg == UIO_XUIO) &&
- (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) {
- int nblk;
- int blksz = zp->z_blksz;
- uint64_t offset = uio->uio_loffset;
-
- xuio = (xuio_t *)uio;
- if ((ISP2(blksz))) {
- nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset,
- blksz)) / blksz;
- } else {
- ASSERT(offset + n <= blksz);
- nblk = 1;
- }
- (void) dmu_xuio_init(xuio, nblk);
-
- if (vn_has_cached_data(ip)) {
- /*
- * For simplicity, we always allocate a full buffer
- * even if we only expect to read a portion of a block.
- */
- while (--nblk >= 0) {
- (void) dmu_xuio_add(xuio,
- dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- blksz), 0, blksz);
- }
- }
- }
-#endif /* HAVE_UIO_ZEROCOPY */
-
- while (n > 0) {
- ssize_t nbytes = MIN(n, zfs_read_chunk_size -
- P2PHASE(uio->uio_loffset, zfs_read_chunk_size));
-
- if (zp->z_is_mapped && !(ioflag & O_DIRECT)) {
- error = mappedread(ip, nbytes, uio);
- } else {
- error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, nbytes);
- }
-
- if (error) {
- /* convert checksum errors into IO errors */
- if (error == ECKSUM)
- error = SET_ERROR(EIO);
- break;
- }
-
- n -= nbytes;
- }
-
- int64_t nread = start_resid - n;
- dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, nread);
- task_io_account_read(nread);
-out:
- zfs_rangelock_exit(lr);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Write the bytes to a file.
- *
- * IN: ip - inode of file to be written to.
- * uio - structure supplying write location, range info,
- * and data buffer.
- * ioflag - O_APPEND flag set if in append mode.
- * O_DIRECT flag; used to bypass page cache.
- * cr - credentials of caller.
- *
- * OUT: uio - updated offset and range.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * ip - ctime|mtime updated if byte count > 0
- */
-
-/* ARGSUSED */
-int
-zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
-{
- int error = 0;
- ssize_t start_resid = uio->uio_resid;
-
- /*
- * Fasttrack empty write
- */
- ssize_t n = start_resid;
- if (n == 0)
- return (0);
-
- rlim64_t limit = uio->uio_limit;
- if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
- limit = MAXOFFSET_T;
-
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- sa_bulk_attr_t bulk[4];
- int count = 0;
- uint64_t mtime[2], ctime[2];
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
- &zp->z_size, 8);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, 8);
-
- /*
- * Callers might not be able to detect properly that we are read-only,
- * so check it explicitly here.
- */
- if (zfs_is_readonly(zfsvfs)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EROFS));
- }
-
- /*
- * If immutable or not appending then return EPERM
- */
- if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) ||
- ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & O_APPEND) &&
- (uio->uio_loffset < zp->z_size))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- /*
- * Validate file offset
- */
- offset_t woff = ioflag & O_APPEND ? zp->z_size : uio->uio_loffset;
- if (woff < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- int max_blksz = zfsvfs->z_max_blksz;
- xuio_t *xuio = NULL;
-
- /*
- * Pre-fault the pages to ensure slow (eg NFS) pages
- * don't hold up txg.
- * Skip this if uio contains loaned arc_buf.
- */
-#ifdef HAVE_UIO_ZEROCOPY
- if ((uio->uio_extflg == UIO_XUIO) &&
- (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY))
- xuio = (xuio_t *)uio;
- else
-#endif
- if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EFAULT));
- }
-
- /*
- * If in append mode, set the io offset pointer to eof.
- */
- zfs_locked_range_t *lr;
- if (ioflag & O_APPEND) {
- /*
- * Obtain an appending range lock to guarantee file append
- * semantics. We reset the write offset once we have the lock.
- */
- lr = zfs_rangelock_enter(&zp->z_rangelock, 0, n, RL_APPEND);
- woff = lr->lr_offset;
- if (lr->lr_length == UINT64_MAX) {
- /*
- * We overlocked the file because this write will cause
- * the file block size to increase.
- * Note that zp_size cannot change with this lock held.
- */
- woff = zp->z_size;
- }
- uio->uio_loffset = woff;
- } else {
- /*
- * Note that if the file block size will change as a result of
- * this write, then this range lock will lock the entire file
- * so that we can re-write the block safely.
- */
- lr = zfs_rangelock_enter(&zp->z_rangelock, woff, n, RL_WRITER);
- }
-
- if (woff >= limit) {
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EFBIG));
- }
-
- if ((woff + n) > limit || woff > (limit - n))
- n = limit - woff;
-
- /* Will this write extend the file length? */
- int write_eof = (woff + n > zp->z_size);
-
- uint64_t end_size = MAX(zp->z_size, woff + n);
- zilog_t *zilog = zfsvfs->z_log;
-#ifdef HAVE_UIO_ZEROCOPY
- int i_iov = 0;
- const iovec_t *iovp = uio->uio_iov;
- int iovcnt __maybe_unused = uio->uio_iovcnt;
-#endif
-
-
- /*
- * Write the file in reasonable size chunks. Each chunk is written
- * in a separate transaction; this keeps the intent log records small
- * and allows us to do more fine-grained space accounting.
- */
- while (n > 0) {
- woff = uio->uio_loffset;
-
- if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT,
- KUID_TO_SUID(ip->i_uid)) ||
- zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT,
- KGID_TO_SGID(ip->i_gid)) ||
- (zp->z_projid != ZFS_DEFAULT_PROJID &&
- zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
- zp->z_projid))) {
- error = SET_ERROR(EDQUOT);
- break;
- }
-
- arc_buf_t *abuf = NULL;
- const iovec_t *aiov = NULL;
- if (xuio) {
-#ifdef HAVE_UIO_ZEROCOPY
- ASSERT(i_iov < iovcnt);
- ASSERT3U(uio->uio_segflg, !=, UIO_BVEC);
- aiov = &iovp[i_iov];
- abuf = dmu_xuio_arcbuf(xuio, i_iov);
- dmu_xuio_clear(xuio, i_iov);
- ASSERT((aiov->iov_base == abuf->b_data) ||
- ((char *)aiov->iov_base - (char *)abuf->b_data +
- aiov->iov_len == arc_buf_size(abuf)));
- i_iov++;
-#endif
- } else if (n >= max_blksz && woff >= zp->z_size &&
- P2PHASE(woff, max_blksz) == 0 &&
- zp->z_blksz == max_blksz) {
- /*
- * This write covers a full block. "Borrow" a buffer
- * from the dmu so that we can fill it before we enter
- * a transaction. This avoids the possibility of
- * holding up the transaction if the data copy hangs
- * up on a pagefault (e.g., from an NFS server mapping).
- */
- size_t cbytes;
-
- abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- max_blksz);
- ASSERT(abuf != NULL);
- ASSERT(arc_buf_size(abuf) == max_blksz);
- if ((error = uiocopy(abuf->b_data, max_blksz,
- UIO_WRITE, uio, &cbytes))) {
- dmu_return_arcbuf(abuf);
- break;
- }
- ASSERT(cbytes == max_blksz);
- }
-
- /*
- * Start a transaction.
- */
- dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- dmu_buf_impl_t *db = (dmu_buf_impl_t *)sa_get_db(zp->z_sa_hdl);
- DB_DNODE_ENTER(db);
- dmu_tx_hold_write_by_dnode(tx, DB_DNODE(db), woff,
- MIN(n, max_blksz));
- DB_DNODE_EXIT(db);
- zfs_sa_upgrade_txholds(tx, zp);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- if (abuf != NULL)
- dmu_return_arcbuf(abuf);
- break;
- }
-
- /*
- * If rangelock_enter() over-locked we grow the blocksize
- * and then reduce the lock range. This will only happen
- * on the first iteration since rangelock_reduce() will
- * shrink down lr_length to the appropriate size.
- */
- if (lr->lr_length == UINT64_MAX) {
- uint64_t new_blksz;
-
- if (zp->z_blksz > max_blksz) {
- /*
- * File's blocksize is already larger than the
- * "recordsize" property. Only let it grow to
- * the next power of 2.
- */
- ASSERT(!ISP2(zp->z_blksz));
- new_blksz = MIN(end_size,
- 1 << highbit64(zp->z_blksz));
- } else {
- new_blksz = MIN(end_size, max_blksz);
- }
- zfs_grow_blocksize(zp, new_blksz, tx);
- zfs_rangelock_reduce(lr, woff, n);
- }
-
- /*
- * XXX - should we really limit each write to z_max_blksz?
- * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
- */
- ssize_t nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
-
- ssize_t tx_bytes;
- if (abuf == NULL) {
- tx_bytes = uio->uio_resid;
- uio->uio_fault_disable = B_TRUE;
- error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, nbytes, tx);
- uio->uio_fault_disable = B_FALSE;
- if (error == EFAULT) {
- dmu_tx_commit(tx);
- /*
- * Account for partial writes before
- * continuing the loop.
- * Update needs to occur before the next
- * uio_prefaultpages, or prefaultpages may
- * error, and we may break the loop early.
- */
- if (tx_bytes != uio->uio_resid)
- n -= tx_bytes - uio->uio_resid;
- if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
- break;
- }
- continue;
- } else if (error != 0) {
- dmu_tx_commit(tx);
- break;
- }
- tx_bytes -= uio->uio_resid;
- } else {
- tx_bytes = nbytes;
- ASSERT(xuio == NULL || tx_bytes == aiov->iov_len);
- /*
- * If this is not a full block write, but we are
- * extending the file past EOF and this data starts
- * block-aligned, use assign_arcbuf(). Otherwise,
- * write via dmu_write().
- */
- if (tx_bytes < max_blksz && (!write_eof ||
- aiov->iov_base != abuf->b_data)) {
- ASSERT(xuio);
- dmu_write(zfsvfs->z_os, zp->z_id, woff,
- /* cppcheck-suppress nullPointer */
- aiov->iov_len, aiov->iov_base, tx);
- dmu_return_arcbuf(abuf);
- xuio_stat_wbuf_copied();
- } else {
- ASSERT(xuio || tx_bytes == max_blksz);
- error = dmu_assign_arcbuf_by_dbuf(
- sa_get_db(zp->z_sa_hdl), woff, abuf, tx);
- if (error != 0) {
- dmu_return_arcbuf(abuf);
- dmu_tx_commit(tx);
- break;
- }
- }
- ASSERT(tx_bytes <= uio->uio_resid);
- uioskip(uio, tx_bytes);
- }
- if (tx_bytes && zp->z_is_mapped && !(ioflag & O_DIRECT)) {
- update_pages(ip, woff,
- tx_bytes, zfsvfs->z_os, zp->z_id);
- }
-
- /*
- * If we made no progress, we're done. If we made even
- * partial progress, update the znode and ZIL accordingly.
- */
- if (tx_bytes == 0) {
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
- (void *)&zp->z_size, sizeof (uint64_t), tx);
- dmu_tx_commit(tx);
- ASSERT(error != 0);
- break;
- }
-
- /*
- * Clear Set-UID/Set-GID bits on successful write if not
- * privileged and at least one of the execute bits is set.
- *
- * It would be nice to do this after all writes have
- * been done, but that would still expose the ISUID/ISGID
- * to another app after the partial write is committed.
- *
- * Note: we don't call zfs_fuid_map_id() here because
- * user 0 is not an ephemeral uid.
- */
- mutex_enter(&zp->z_acl_lock);
- uint32_t uid = KUID_TO_SUID(ip->i_uid);
- if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) |
- (S_IXUSR >> 6))) != 0 &&
- (zp->z_mode & (S_ISUID | S_ISGID)) != 0 &&
- secpolicy_vnode_setid_retain(cr,
- ((zp->z_mode & S_ISUID) != 0 && uid == 0)) != 0) {
- uint64_t newmode;
- zp->z_mode &= ~(S_ISUID | S_ISGID);
- ip->i_mode = newmode = zp->z_mode;
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs),
- (void *)&newmode, sizeof (uint64_t), tx);
- }
- mutex_exit(&zp->z_acl_lock);
-
- zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
-
- /*
- * Update the file size (zp_size) if it has changed;
- * account for possible concurrent updates.
- */
- while ((end_size = zp->z_size) < uio->uio_loffset) {
- (void) atomic_cas_64(&zp->z_size, end_size,
- uio->uio_loffset);
- ASSERT(error == 0);
- }
- /*
- * If we are replaying and eof is non zero then force
- * the file size to the specified eof. Note, there's no
- * concurrency during replay.
- */
- if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0)
- zp->z_size = zfsvfs->z_replay_eof;
-
- error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
-
- zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag,
- NULL, NULL);
- dmu_tx_commit(tx);
-
- if (error != 0)
- break;
- ASSERT(tx_bytes == nbytes);
- n -= nbytes;
-
- if (!xuio && n > 0) {
- if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
- error = EFAULT;
- break;
- }
- }
- }
-
- zfs_inode_update(zp);
- zfs_rangelock_exit(lr);
-
- /*
- * If we're in replay mode, or we made no progress, return error.
- * Otherwise, it's at least a partial write, so it's successful.
- */
- if (zfsvfs->z_replay || uio->uio_resid == start_resid) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (ioflag & (O_SYNC | O_DSYNC) ||
- zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, zp->z_id);
-
- int64_t nwritten = start_resid - uio->uio_resid;
- dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, nwritten);
- task_io_account_write(nwritten);
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*
- * Write the bytes to a file.
- *
- * IN: zp - znode of file to be written to
- * data - bytes to write
- * len - number of bytes to write
- * pos - offset to start writing at
- *
- * OUT: resid - remaining bytes to write
- *
- * RETURN: 0 if success
- * positive error code if failure
- *
- * Timestamps:
- * zp - ctime|mtime updated if byte count > 0
- */
-int
-zfs_write_simple(znode_t *zp, const void *data, size_t len,
- loff_t pos, size_t *resid)
-{
- ssize_t written;
- int error = 0;
-
- written = zpl_write_common(ZTOI(zp), data, len, &pos,
- UIO_SYSSPACE, 0, kcred);
- if (written < 0) {
- error = -written;
- } else if (resid == NULL) {
- if (written < len)
- error = SET_ERROR(EIO); /* short write */
- } else {
- *resid = len - written;
- }
- return (error);
-}
-
-/*
- * Drop a reference on the passed inode asynchronously. This ensures
- * that the caller will never drop the last reference on an inode in
- * the current context. Doing so while holding open a tx could result
- * in a deadlock if iput_final() re-enters the filesystem code.
- */
-void
-zfs_zrele_async(znode_t *zp)
-{
- struct inode *ip = ZTOI(zp);
- objset_t *os = ITOZSB(ip)->z_os;
-
- ASSERT(atomic_read(&ip->i_count) > 0);
- ASSERT(os != NULL);
-
- if (atomic_read(&ip->i_count) == 1)
- VERIFY(taskq_dispatch(dsl_pool_zrele_taskq(dmu_objset_pool(os)),
- (task_func_t *)iput, ip, TQ_SLEEP) != TASKQID_INVALID);
- else
- zrele(zp);
-}
-
-/* ARGSUSED */
-static void
-zfs_get_done(zgd_t *zgd, int error)
-{
- znode_t *zp = zgd->zgd_private;
-
- if (zgd->zgd_db)
- dmu_buf_rele(zgd->zgd_db, zgd);
-
- zfs_rangelock_exit(zgd->zgd_lr);
-
- /*
- * Release the vnode asynchronously as we currently have the
- * txg stopped from syncing.
- */
- zfs_zrele_async(zp);
-
- kmem_free(zgd, sizeof (zgd_t));
-}
-
-#ifdef ZFS_DEBUG
-static int zil_fault_io = 0;
-#endif
-
-/*
- * Get data to generate a TX_WRITE intent log record.
- */
-int
-zfs_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb, zio_t *zio)
-{
- zfsvfs_t *zfsvfs = arg;
- objset_t *os = zfsvfs->z_os;
- znode_t *zp;
- uint64_t object = lr->lr_foid;
- uint64_t offset = lr->lr_offset;
- uint64_t size = lr->lr_length;
- dmu_buf_t *db;
- zgd_t *zgd;
- int error = 0;
-
- ASSERT3P(lwb, !=, NULL);
- ASSERT3P(zio, !=, NULL);
- ASSERT3U(size, !=, 0);
-
- /*
- * Nothing to do if the file has been removed
- */
- if (zfs_zget(zfsvfs, object, &zp) != 0)
- return (SET_ERROR(ENOENT));
- if (zp->z_unlinked) {
- /*
- * Release the vnode asynchronously as we currently have the
- * txg stopped from syncing.
- */
- zfs_zrele_async(zp);
- return (SET_ERROR(ENOENT));
- }
-
- zgd = kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
- zgd->zgd_lwb = lwb;
- zgd->zgd_private = zp;
-
- /*
- * Write records come in two flavors: immediate and indirect.
- * For small writes it's cheaper to store the data with the
- * log record (immediate); for large writes it's cheaper to
- * sync the data and get a pointer to it (indirect) so that
- * we don't have to write the data twice.
- */
- if (buf != NULL) { /* immediate write */
- zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
- offset, size, RL_READER);
- /* test for truncation needs to be done while range locked */
- if (offset >= zp->z_size) {
- error = SET_ERROR(ENOENT);
- } else {
- error = dmu_read(os, object, offset, size, buf,
- DMU_READ_NO_PREFETCH);
- }
- ASSERT(error == 0 || error == ENOENT);
- } else { /* indirect write */
- /*
- * Have to lock the whole block to ensure when it's
- * written out and its checksum is being calculated
- * that no one can change the data. We need to re-check
- * blocksize after we get the lock in case it's changed!
- */
- for (;;) {
- uint64_t blkoff;
- size = zp->z_blksz;
- blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
- offset -= blkoff;
- zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
- offset, size, RL_READER);
- if (zp->z_blksz == size)
- break;
- offset += blkoff;
- zfs_rangelock_exit(zgd->zgd_lr);
- }
- /* test for truncation needs to be done while range locked */
- if (lr->lr_offset >= zp->z_size)
- error = SET_ERROR(ENOENT);
-#ifdef ZFS_DEBUG
- if (zil_fault_io) {
- error = SET_ERROR(EIO);
- zil_fault_io = 0;
- }
-#endif
- if (error == 0)
- error = dmu_buf_hold(os, object, offset, zgd, &db,
- DMU_READ_NO_PREFETCH);
-
- if (error == 0) {
- blkptr_t *bp = &lr->lr_blkptr;
-
- zgd->zgd_db = db;
- zgd->zgd_bp = bp;
-
- ASSERT(db->db_offset == offset);
- ASSERT(db->db_size == size);
-
- error = dmu_sync(zio, lr->lr_common.lrc_txg,
- zfs_get_done, zgd);
- ASSERT(error || lr->lr_length <= size);
-
- /*
- * On success, we need to wait for the write I/O
- * initiated by dmu_sync() to complete before we can
- * release this dbuf. We will finish everything up
- * in the zfs_get_done() callback.
- */
- if (error == 0)
- return (0);
-
- if (error == EALREADY) {
- lr->lr_common.lrc_txtype = TX_WRITE2;
- /*
- * TX_WRITE2 relies on the data previously
- * written by the TX_WRITE that caused
- * EALREADY. We zero out the BP because
- * it is the old, currently-on-disk BP.
- */
- zgd->zgd_bp = NULL;
- BP_ZERO(bp);
- error = 0;
- }
- }
- }
-
- zfs_get_done(zgd, error);
-
- return (error);
-}
-
-/*ARGSUSED*/
-int
-zfs_access(struct inode *ip, int mode, int flag, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (flag & V_ACE_MASK)
- error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
- else
- error = zfs_zaccess_rwx(zp, mode, flag, cr);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Lookup an entry in a directory, or an extended attribute directory.
- * If it exists, return a held inode reference for it.
- *
- * IN: zdp - znode of directory to search.
- * nm - name of entry to lookup.
- * flags - LOOKUP_XATTR set if looking for an attribute.
- * cr - credentials of caller.
- * direntflags - directory lookup flags
- * realpnp - returned pathname.
- *
- * OUT: zpp - znode of located entry, NULL if not found.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * NA
- */
-/* ARGSUSED */
-int
-zfs_lookup(znode_t *zdp, char *nm, znode_t **zpp, int flags, cred_t *cr,
- int *direntflags, pathname_t *realpnp)
-{
- zfsvfs_t *zfsvfs = ZTOZSB(zdp);
- int error = 0;
-
- /*
- * Fast path lookup, however we must skip DNLC lookup
- * for case folding or normalizing lookups because the
- * DNLC code only stores the passed in name. This means
- * creating 'a' and removing 'A' on a case insensitive
- * file system would work, but DNLC still thinks 'a'
- * exists and won't let you create it again on the next
- * pass through fast path.
- */
- if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) {
-
- if (!S_ISDIR(ZTOI(zdp)->i_mode)) {
- return (SET_ERROR(ENOTDIR));
- } else if (zdp->z_sa_hdl == NULL) {
- return (SET_ERROR(EIO));
- }
-
- if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) {
- error = zfs_fastaccesschk_execute(zdp, cr);
- if (!error) {
- *zpp = zdp;
- zhold(*zpp);
- return (0);
- }
- return (error);
- }
- }
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zdp);
-
- *zpp = NULL;
-
- if (flags & LOOKUP_XATTR) {
- /*
- * We don't allow recursive attributes..
- * Maybe someday we will.
- */
- if (zdp->z_pflags & ZFS_XATTR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if ((error = zfs_get_xattrdir(zdp, zpp, cr, flags))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Do we have permission to get into attribute directory?
- */
-
- if ((error = zfs_zaccess(*zpp, ACE_EXECUTE, 0,
- B_FALSE, cr))) {
- zrele(*zpp);
- *zpp = NULL;
- }
-
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (!S_ISDIR(ZTOI(zdp)->i_mode)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENOTDIR));
- }
-
- /*
- * Check accessibility of directory.
- */
-
- if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- error = zfs_dirlook(zdp, nm, zpp, flags, direntflags, realpnp);
- if ((error == 0) && (*zpp))
- zfs_inode_update(*zpp);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Attempt to create a new entry in a directory. If the entry
- * already exists, truncate the file if permissible, else return
- * an error. Return the ip of the created or trunc'd file.
- *
- * IN: dzp - znode of directory to put new file entry in.
- * name - name of new file entry.
- * vap - attributes of new file.
- * excl - flag indicating exclusive or non-exclusive mode.
- * mode - mode to open file with.
- * cr - credentials of caller.
- * flag - file flag.
- * vsecp - ACL to be set
- *
- * OUT: zpp - znode of created or trunc'd entry.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dzp - ctime|mtime updated if new entry created
- * zp - ctime|mtime always, atime if new
- */
-
-/* ARGSUSED */
-int
-zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl,
- int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- zilog_t *zilog;
- objset_t *os;
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- int error;
- uid_t uid;
- gid_t gid;
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
- boolean_t have_acl = B_FALSE;
- boolean_t waited = B_FALSE;
-
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
-
- gid = crgetgid(cr);
- uid = crgetuid(cr);
-
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- os = zfsvfs->z_os;
- zilog = zfsvfs->z_log;
-
- if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- if (vap->va_mask & ATTR_XVATTR) {
- if ((error = secpolicy_xvattr((xvattr_t *)vap,
- crgetuid(cr), cr, vap->va_mode)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
-top:
- *zpp = NULL;
- if (*name == '\0') {
- /*
- * Null component name refers to the directory itself.
- */
- zhold(dzp);
- zp = dzp;
- dl = NULL;
- error = 0;
- } else {
- /* possible igrab(zp) */
- int zflg = 0;
-
- if (flag & FIGNORECASE)
- zflg |= ZCILOOK;
-
- error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
- NULL, NULL);
- if (error) {
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- if (strcmp(name, "..") == 0)
- error = SET_ERROR(EISDIR);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- if (zp == NULL) {
- uint64_t txtype;
- uint64_t projid = ZFS_DEFAULT_PROJID;
-
- /*
- * Create a new file object and update the directory
- * to reference it.
- */
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- goto out;
- }
-
- /*
- * We only support the creation of regular files in
- * extended attribute directories.
- */
-
- if ((dzp->z_pflags & ZFS_XATTR) && !S_ISREG(vap->va_mode)) {
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- error = SET_ERROR(EINVAL);
- goto out;
- }
-
- if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
- cr, vsecp, &acl_ids)) != 0)
- goto out;
- have_acl = B_TRUE;
-
- if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
- projid = zfs_inherit_projid(dzp);
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
- zfs_acl_ids_free(&acl_ids);
- error = SET_ERROR(EDQUOT);
- goto out;
- }
-
- tx = dmu_tx_create(os);
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
-
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
- dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
- if (!zfsvfs->z_use_sa &&
- acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, acl_ids.z_aclp->z_acl_bytes);
- }
-
- error = dmu_tx_assign(tx,
- (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- goto top;
- }
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
-
- error = zfs_link_create(dl, zp, tx, ZNEW);
- if (error != 0) {
- /*
- * Since, we failed to add the directory entry for it,
- * delete the newly created dnode.
- */
- zfs_znode_delete(zp, tx);
- remove_inode_hash(ZTOI(zp));
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
- goto out;
- }
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
- if (flag & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_create(zilog, tx, txtype, dzp, zp, name,
- vsecp, acl_ids.z_fuidp, vap);
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
- } else {
- int aflags = (flag & O_APPEND) ? V_APPEND : 0;
-
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- have_acl = B_FALSE;
-
- /*
- * A directory entry already exists for this name.
- */
- /*
- * Can't truncate an existing file if in exclusive mode.
- */
- if (excl) {
- error = SET_ERROR(EEXIST);
- goto out;
- }
- /*
- * Can't open a directory for writing.
- */
- if (S_ISDIR(ZTOI(zp)->i_mode)) {
- error = SET_ERROR(EISDIR);
- goto out;
- }
- /*
- * Verify requested access to file.
- */
- if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) {
- goto out;
- }
-
- mutex_enter(&dzp->z_lock);
- dzp->z_seq++;
- mutex_exit(&dzp->z_lock);
-
- /*
- * Truncate regular files if requested.
- */
- if (S_ISREG(ZTOI(zp)->i_mode) &&
- (vap->va_mask & ATTR_SIZE) && (vap->va_size == 0)) {
- /* we can't hold any locks when calling zfs_freesp() */
- if (dl) {
- zfs_dirent_unlock(dl);
- dl = NULL;
- }
- error = zfs_freesp(zp, 0, 0, mode, TRUE);
- }
- }
-out:
-
- if (dl)
- zfs_dirent_unlock(dl);
-
- if (error) {
- if (zp)
- zrele(zp);
- } else {
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- *zpp = zp;
- }
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/* ARGSUSED */
-int
-zfs_tmpfile(struct inode *dip, vattr_t *vap, int excl,
- int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp)
-{
- znode_t *zp = NULL, *dzp = ITOZ(dip);
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- objset_t *os;
- dmu_tx_t *tx;
- int error;
- uid_t uid;
- gid_t gid;
- zfs_acl_ids_t acl_ids;
- uint64_t projid = ZFS_DEFAULT_PROJID;
- boolean_t fuid_dirtied;
- boolean_t have_acl = B_FALSE;
- boolean_t waited = B_FALSE;
-
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
-
- gid = crgetgid(cr);
- uid = crgetuid(cr);
-
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- os = zfsvfs->z_os;
-
- if (vap->va_mask & ATTR_XVATTR) {
- if ((error = secpolicy_xvattr((xvattr_t *)vap,
- crgetuid(cr), cr, vap->va_mode)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
-top:
- *ipp = NULL;
-
- /*
- * Create a new file object and update the directory
- * to reference it.
- */
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- goto out;
- }
-
- if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
- cr, vsecp, &acl_ids)) != 0)
- goto out;
- have_acl = B_TRUE;
-
- if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
- projid = zfs_inherit_projid(dzp);
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
- zfs_acl_ids_free(&acl_ids);
- error = SET_ERROR(EDQUOT);
- goto out;
- }
-
- tx = dmu_tx_create(os);
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
-
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- if (!zfsvfs->z_use_sa &&
- acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, acl_ids.z_aclp->z_acl_bytes);
- }
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- goto top;
- }
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- zfs_mknode(dzp, vap, tx, cr, IS_TMPFILE, &zp, &acl_ids);
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- /* Add to unlinked set */
- zp->z_unlinked = B_TRUE;
- zfs_unlinked_add(zp, tx);
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
-out:
-
- if (error) {
- if (zp)
- zrele(zp);
- } else {
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- *ipp = ZTOI(zp);
- }
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Remove an entry from a directory.
- *
- * IN: dzp - znode of directory to remove entry from.
- * name - name of entry to remove.
- * cr - credentials of caller.
- * flags - case flags.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * dzp - ctime|mtime
- * ip - ctime (if nlink > 0)
- */
-
-uint64_t null_xattr = 0;
-
-/*ARGSUSED*/
-int
-zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags)
-{
- znode_t *zp;
- znode_t *xzp;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- zilog_t *zilog;
- uint64_t acl_obj, xattr_obj;
- uint64_t xattr_obj_unlinked = 0;
- uint64_t obj = 0;
- uint64_t links;
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- boolean_t may_delete_now, delete_now = FALSE;
- boolean_t unlinked, toobig = FALSE;
- uint64_t txtype;
- pathname_t *realnmp = NULL;
- pathname_t realnm;
- int error;
- int zflg = ZEXISTS;
- boolean_t waited = B_FALSE;
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (flags & FIGNORECASE) {
- zflg |= ZCILOOK;
- pn_alloc(&realnm);
- realnmp = &realnm;
- }
-
-top:
- xattr_obj = 0;
- xzp = NULL;
- /*
- * Attempt to lock directory; fail if entry doesn't exist.
- */
- if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
- NULL, realnmp))) {
- if (realnmp)
- pn_free(realnmp);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- /*
- * Need to use rmdir for removing directories.
- */
- if (S_ISDIR(ZTOI(zp)->i_mode)) {
- error = SET_ERROR(EPERM);
- goto out;
- }
-
- mutex_enter(&zp->z_lock);
- may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 &&
- !(zp->z_is_mapped);
- mutex_exit(&zp->z_lock);
-
- /*
- * We may delete the znode now, or we may put it in the unlinked set;
- * it depends on whether we're the last link, and on whether there are
- * other holds on the inode. So we dmu_tx_hold() the right things to
- * allow for either case.
- */
- obj = zp->z_id;
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
- zfs_sa_upgrade_txholds(tx, dzp);
- if (may_delete_now) {
- toobig = zp->z_size > zp->z_blksz * zfs_delete_blocks;
- /* if the file is too big, only hold_free a token amount */
- dmu_tx_hold_free(tx, zp->z_id, 0,
- (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END));
- }
-
- /* are there any extended attributes? */
- error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
- &xattr_obj, sizeof (xattr_obj));
- if (error == 0 && xattr_obj) {
- error = zfs_zget(zfsvfs, xattr_obj, &xzp);
- ASSERT0(error);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
- }
-
- mutex_enter(&zp->z_lock);
- if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now)
- dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);
- mutex_exit(&zp->z_lock);
-
- /* charge as an update -- would be nice not to charge at all */
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
-
- /*
- * Mark this transaction as typically resulting in a net free of space
- */
- dmu_tx_mark_netfree(tx);
-
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- zrele(zp);
- if (xzp)
- zrele(xzp);
- goto top;
- }
- if (realnmp)
- pn_free(realnmp);
- dmu_tx_abort(tx);
- zrele(zp);
- if (xzp)
- zrele(xzp);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Remove the directory entry.
- */
- error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked);
-
- if (error) {
- dmu_tx_commit(tx);
- goto out;
- }
-
- if (unlinked) {
- /*
- * Hold z_lock so that we can make sure that the ACL obj
- * hasn't changed. Could have been deleted due to
- * zfs_sa_upgrade().
- */
- mutex_enter(&zp->z_lock);
- (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
- &xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
- delete_now = may_delete_now && !toobig &&
- atomic_read(&ZTOI(zp)->i_count) == 1 &&
- !(zp->z_is_mapped) && xattr_obj == xattr_obj_unlinked &&
- zfs_external_acl(zp) == acl_obj;
- }
-
- if (delete_now) {
- if (xattr_obj_unlinked) {
- ASSERT3U(ZTOI(xzp)->i_nlink, ==, 2);
- mutex_enter(&xzp->z_lock);
- xzp->z_unlinked = B_TRUE;
- clear_nlink(ZTOI(xzp));
- links = 0;
- error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs),
- &links, sizeof (links), tx);
- ASSERT3U(error, ==, 0);
- mutex_exit(&xzp->z_lock);
- zfs_unlinked_add(xzp, tx);
-
- if (zp->z_is_sa)
- error = sa_remove(zp->z_sa_hdl,
- SA_ZPL_XATTR(zfsvfs), tx);
- else
- error = sa_update(zp->z_sa_hdl,
- SA_ZPL_XATTR(zfsvfs), &null_xattr,
- sizeof (uint64_t), tx);
- ASSERT0(error);
- }
- /*
- * Add to the unlinked set because a new reference could be
- * taken concurrently resulting in a deferred destruction.
- */
- zfs_unlinked_add(zp, tx);
- mutex_exit(&zp->z_lock);
- } else if (unlinked) {
- mutex_exit(&zp->z_lock);
- zfs_unlinked_add(zp, tx);
- }
-
- txtype = TX_REMOVE;
- if (flags & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked);
-
- dmu_tx_commit(tx);
-out:
- if (realnmp)
- pn_free(realnmp);
-
- zfs_dirent_unlock(dl);
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
-
- if (delete_now)
- zrele(zp);
- else
- zfs_zrele_async(zp);
-
- if (xzp) {
- zfs_inode_update(xzp);
- zfs_zrele_async(xzp);
- }
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Create a new directory and insert it into dzp using the name
- * provided. Return a pointer to the inserted directory.
- *
- * IN: dzp - znode of directory to add subdir to.
- * dirname - name of new directory.
- * vap - attributes of new directory.
- * cr - credentials of caller.
- * flags - case flags.
- * vsecp - ACL to be set
- *
- * OUT: zpp - znode of created directory.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * dzp - ctime|mtime updated
- * zpp - ctime|mtime|atime updated
- */
-/*ARGSUSED*/
-int
-zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap, znode_t **zpp,
- cred_t *cr, int flags, vsecattr_t *vsecp)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- zilog_t *zilog;
- zfs_dirlock_t *dl;
- uint64_t txtype;
- dmu_tx_t *tx;
- int error;
- int zf = ZNEW;
- uid_t uid;
- gid_t gid = crgetgid(cr);
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
- boolean_t waited = B_FALSE;
-
- ASSERT(S_ISDIR(vap->va_mode));
-
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
-
- uid = crgetuid(cr);
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
-
- if (dirname == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (dzp->z_pflags & ZFS_XATTR) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (zfsvfs->z_utf8 && u8_validate(dirname,
- strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
- if (flags & FIGNORECASE)
- zf |= ZCILOOK;
-
- if (vap->va_mask & ATTR_XVATTR) {
- if ((error = secpolicy_xvattr((xvattr_t *)vap,
- crgetuid(cr), cr, vap->va_mode)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- }
-
- if ((error = zfs_acl_ids_create(dzp, 0, vap, cr,
- vsecp, &acl_ids)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- /*
- * First make sure the new directory doesn't exist.
- *
- * Existence is checked first to make sure we don't return
- * EACCES instead of EEXIST which can cause some applications
- * to fail.
- */
-top:
- *zpp = NULL;
-
- if ((error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf,
- NULL, NULL))) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr))) {
- zfs_acl_ids_free(&acl_ids);
- zfs_dirent_unlock(dl);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) {
- zfs_acl_ids_free(&acl_ids);
- zfs_dirent_unlock(dl);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EDQUOT));
- }
-
- /*
- * Add a new entry to the directory.
- */
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
- dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
- acl_ids.z_aclp->z_acl_bytes);
- }
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
-
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- goto top;
- }
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Create new node.
- */
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
-
- /*
- * Now put new name in parent dir.
- */
- error = zfs_link_create(dl, zp, tx, ZNEW);
- if (error != 0) {
- zfs_znode_delete(zp, tx);
- remove_inode_hash(ZTOI(zp));
- goto out;
- }
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- *zpp = zp;
-
- txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap);
- if (flags & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp,
- acl_ids.z_fuidp, vap);
-
-out:
- zfs_acl_ids_free(&acl_ids);
-
- dmu_tx_commit(tx);
-
- zfs_dirent_unlock(dl);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- if (error != 0) {
- zrele(zp);
- } else {
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- }
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Remove a directory subdir entry. If the current working
- * directory is the same as the subdir to be removed, the
- * remove will fail.
- *
- * IN: dzp - znode of directory to remove from.
- * name - name of directory to be removed.
- * cwd - inode of current working directory.
- * cr - credentials of caller.
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dzp - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd, cred_t *cr,
- int flags)
-{
- znode_t *zp;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- zilog_t *zilog;
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- int error;
- int zflg = ZEXISTS;
- boolean_t waited = B_FALSE;
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (flags & FIGNORECASE)
- zflg |= ZCILOOK;
-top:
- zp = NULL;
-
- /*
- * Attempt to lock directory; fail if entry doesn't exist.
- */
- if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
- NULL, NULL))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- if (!S_ISDIR(ZTOI(zp)->i_mode)) {
- error = SET_ERROR(ENOTDIR);
- goto out;
- }
-
- if (zp == cwd) {
- error = SET_ERROR(EINVAL);
- goto out;
- }
-
- /*
- * Grab a lock on the directory to make sure that no one is
- * trying to add (or lookup) entries while we are removing it.
- */
- rw_enter(&zp->z_name_lock, RW_WRITER);
-
- /*
- * Grab a lock on the parent pointer to make sure we play well
- * with the treewalk and directory rename code.
- */
- rw_enter(&zp->z_parent_lock, RW_WRITER);
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
- zfs_sa_upgrade_txholds(tx, zp);
- zfs_sa_upgrade_txholds(tx, dzp);
- dmu_tx_mark_netfree(tx);
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- rw_exit(&zp->z_parent_lock);
- rw_exit(&zp->z_name_lock);
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- zrele(zp);
- goto top;
- }
- dmu_tx_abort(tx);
- zrele(zp);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- error = zfs_link_destroy(dl, zp, tx, zflg, NULL);
-
- if (error == 0) {
- uint64_t txtype = TX_RMDIR;
- if (flags & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT,
- B_FALSE);
- }
-
- dmu_tx_commit(tx);
-
- rw_exit(&zp->z_parent_lock);
- rw_exit(&zp->z_name_lock);
-out:
- zfs_dirent_unlock(dl);
-
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- zrele(zp);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Read directory entries from the given directory cursor position and emit
- * name and position for each entry.
- *
- * IN: ip - inode of directory to read.
- * ctx - directory entry context.
- * cr - credentials of caller.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * ip - atime updated
- *
- * Note that the low 4 bits of the cookie returned by zap is always zero.
- * This allows us to use the low range for "special" directory entries:
- * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
- * we use the offset 2 for the '.zfs' directory.
- */
-/* ARGSUSED */
-int
-zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- objset_t *os;
- zap_cursor_t zc;
- zap_attribute_t zap;
- int error;
- uint8_t prefetch;
- uint8_t type;
- int done = 0;
- uint64_t parent;
- uint64_t offset; /* must be unsigned; checks for < 1 */
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
- &parent, sizeof (parent))) != 0)
- goto out;
-
- /*
- * Quit if directory has been removed (posix)
- */
- if (zp->z_unlinked)
- goto out;
-
- error = 0;
- os = zfsvfs->z_os;
- offset = ctx->pos;
- prefetch = zp->z_zn_prefetch;
-
- /*
- * Initialize the iterator cursor.
- */
- if (offset <= 3) {
- /*
- * Start iteration from the beginning of the directory.
- */
- zap_cursor_init(&zc, os, zp->z_id);
- } else {
- /*
- * The offset is a serialized cursor.
- */
- zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
- }
-
- /*
- * Transform to file-system independent format
- */
- while (!done) {
- uint64_t objnum;
- /*
- * Special case `.', `..', and `.zfs'.
- */
- if (offset == 0) {
- (void) strcpy(zap.za_name, ".");
- zap.za_normalization_conflict = 0;
- objnum = zp->z_id;
- type = DT_DIR;
- } else if (offset == 1) {
- (void) strcpy(zap.za_name, "..");
- zap.za_normalization_conflict = 0;
- objnum = parent;
- type = DT_DIR;
- } else if (offset == 2 && zfs_show_ctldir(zp)) {
- (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
- zap.za_normalization_conflict = 0;
- objnum = ZFSCTL_INO_ROOT;
- type = DT_DIR;
- } else {
- /*
- * Grab next entry.
- */
- if ((error = zap_cursor_retrieve(&zc, &zap))) {
- if (error == ENOENT)
- break;
- else
- goto update;
- }
-
- /*
- * Allow multiple entries provided the first entry is
- * the object id. Non-zpl consumers may safely make
- * use of the additional space.
- *
- * XXX: This should be a feature flag for compatibility
- */
- if (zap.za_integer_length != 8 ||
- zap.za_num_integers == 0) {
- cmn_err(CE_WARN, "zap_readdir: bad directory "
- "entry, obj = %lld, offset = %lld, "
- "length = %d, num = %lld\n",
- (u_longlong_t)zp->z_id,
- (u_longlong_t)offset,
- zap.za_integer_length,
- (u_longlong_t)zap.za_num_integers);
- error = SET_ERROR(ENXIO);
- goto update;
- }
-
- objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
- type = ZFS_DIRENT_TYPE(zap.za_first_integer);
- }
-
- done = !zpl_dir_emit(ctx, zap.za_name, strlen(zap.za_name),
- objnum, type);
- if (done)
- break;
-
- /* Prefetch znode */
- if (prefetch) {
- dmu_prefetch(os, objnum, 0, 0, 0,
- ZIO_PRIORITY_SYNC_READ);
- }
-
- /*
- * Move to the next entry, fill in the previous offset.
- */
- if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
- zap_cursor_advance(&zc);
- offset = zap_cursor_serialize(&zc);
- } else {
- offset += 1;
- }
- ctx->pos = offset;
- }
- zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
-
-update:
- zap_cursor_fini(&zc);
- if (error == ENOENT)
- error = 0;
-out:
- ZFS_EXIT(zfsvfs);
-
- return (error);
-}
-
-ulong_t zfs_fsync_sync_cnt = 4;
-
-int
-zfs_fsync(znode_t *zp, int syncflag, cred_t *cr)
-{
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
-
- (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt);
-
- if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- zil_commit(zfsvfs->z_log, zp->z_id);
- ZFS_EXIT(zfsvfs);
- }
- tsd_set(zfs_fsyncer_key, NULL);
-
- return (0);
-}
-
-/*
- * Get the basic file attributes and place them in the provided kstat
- * structure. The inode is assumed to be the authoritative source
- * for most of the attributes. However, the znode currently has the
- * authoritative atime, blksize, and block count.
- *
- * IN: ip - inode of file.
- *
- * OUT: sp - kstat values.
- *
- * RETURN: 0 (always succeeds)
- */
-/* ARGSUSED */
-int
-zfs_getattr_fast(struct inode *ip, struct kstat *sp)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- uint32_t blksize;
- u_longlong_t nblocks;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- mutex_enter(&zp->z_lock);
-
- generic_fillattr(ip, sp);
- /*
- * +1 link count for root inode with visible '.zfs' directory.
- */
- if ((zp->z_id == zfsvfs->z_root) && zfs_show_ctldir(zp))
- if (sp->nlink < ZFS_LINK_MAX)
- sp->nlink++;
-
- sa_object_size(zp->z_sa_hdl, &blksize, &nblocks);
- sp->blksize = blksize;
- sp->blocks = nblocks;
-
- if (unlikely(zp->z_blksz == 0)) {
- /*
- * Block size hasn't been set; suggest maximal I/O transfers.
- */
- sp->blksize = zfsvfs->z_max_blksz;
- }
-
- mutex_exit(&zp->z_lock);
-
- /*
- * Required to prevent NFS client from detecting different inode
- * numbers of snapshot root dentry before and after snapshot mount.
- */
- if (zfsvfs->z_issnap) {
- if (ip->i_sb->s_root->d_inode == ip)
- sp->ino = ZFSCTL_INO_SNAPDIRS -
- dmu_objset_id(zfsvfs->z_os);
- }
-
- ZFS_EXIT(zfsvfs);
-
- return (0);
-}
-
-/*
- * For the operation of changing file's user/group/project, we need to
- * handle not only the main object that is assigned to the file directly,
- * but also the ones that are used by the file via hidden xattr directory.
- *
- * Because the xattr directory may contains many EA entries, as to it may
- * be impossible to change all of them via the transaction of changing the
- * main object's user/group/project attributes. Then we have to change them
- * via other multiple independent transactions one by one. It may be not good
- * solution, but we have no better idea yet.
- */
-static int
-zfs_setattr_dir(znode_t *dzp)
-{
- struct inode *dxip = ZTOI(dzp);
- struct inode *xip = NULL;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- objset_t *os = zfsvfs->z_os;
- zap_cursor_t zc;
- zap_attribute_t zap;
- zfs_dirlock_t *dl;
- znode_t *zp = NULL;
- dmu_tx_t *tx = NULL;
- uint64_t uid, gid;
- sa_bulk_attr_t bulk[4];
- int count;
- int err;
-
- zap_cursor_init(&zc, os, dzp->z_id);
- while ((err = zap_cursor_retrieve(&zc, &zap)) == 0) {
- count = 0;
- if (zap.za_integer_length != 8 || zap.za_num_integers != 1) {
- err = ENXIO;
- break;
- }
-
- err = zfs_dirent_lock(&dl, dzp, (char *)zap.za_name, &zp,
- ZEXISTS, NULL, NULL);
- if (err == ENOENT)
- goto next;
- if (err)
- break;
-
- xip = ZTOI(zp);
- if (KUID_TO_SUID(xip->i_uid) == KUID_TO_SUID(dxip->i_uid) &&
- KGID_TO_SGID(xip->i_gid) == KGID_TO_SGID(dxip->i_gid) &&
- zp->z_projid == dzp->z_projid)
- goto next;
-
- tx = dmu_tx_create(os);
- if (!(zp->z_pflags & ZFS_PROJID))
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- else
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
-
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err)
- break;
-
- mutex_enter(&dzp->z_lock);
-
- if (KUID_TO_SUID(xip->i_uid) != KUID_TO_SUID(dxip->i_uid)) {
- xip->i_uid = dxip->i_uid;
- uid = zfs_uid_read(dxip);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
- &uid, sizeof (uid));
- }
-
- if (KGID_TO_SGID(xip->i_gid) != KGID_TO_SGID(dxip->i_gid)) {
- xip->i_gid = dxip->i_gid;
- gid = zfs_gid_read(dxip);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
- &gid, sizeof (gid));
- }
-
- if (zp->z_projid != dzp->z_projid) {
- if (!(zp->z_pflags & ZFS_PROJID)) {
- zp->z_pflags |= ZFS_PROJID;
- SA_ADD_BULK_ATTR(bulk, count,
- SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags,
- sizeof (zp->z_pflags));
- }
-
- zp->z_projid = dzp->z_projid;
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PROJID(zfsvfs),
- NULL, &zp->z_projid, sizeof (zp->z_projid));
- }
-
- mutex_exit(&dzp->z_lock);
-
- if (likely(count > 0)) {
- err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- dmu_tx_commit(tx);
- } else {
- dmu_tx_abort(tx);
- }
- tx = NULL;
- if (err != 0 && err != ENOENT)
- break;
-
-next:
- if (zp) {
- zrele(zp);
- zp = NULL;
- zfs_dirent_unlock(dl);
- }
- zap_cursor_advance(&zc);
- }
-
- if (tx)
- dmu_tx_abort(tx);
- if (zp) {
- zrele(zp);
- zfs_dirent_unlock(dl);
- }
- zap_cursor_fini(&zc);
-
- return (err == ENOENT ? 0 : err);
-}
-
-/*
- * Set the file attributes to the values contained in the
- * vattr structure.
- *
- * IN: zp - znode of file to be modified.
- * vap - new attribute values.
- * If ATTR_XVATTR set, then optional attrs are being set
- * flags - ATTR_UTIME set if non-default time values provided.
- * - ATTR_NOACLCHECK (CIFS context only).
- * cr - credentials of caller.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * ip - ctime updated, mtime updated if size changed.
- */
-/* ARGSUSED */
-int
-zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr)
-{
- struct inode *ip;
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- objset_t *os = zfsvfs->z_os;
- zilog_t *zilog;
- dmu_tx_t *tx;
- vattr_t oldva;
- xvattr_t *tmpxvattr;
- uint_t mask = vap->va_mask;
- uint_t saved_mask = 0;
- int trim_mask = 0;
- uint64_t new_mode;
- uint64_t new_kuid = 0, new_kgid = 0, new_uid, new_gid;
- uint64_t xattr_obj;
- uint64_t mtime[2], ctime[2], atime[2];
- uint64_t projid = ZFS_INVALID_PROJID;
- znode_t *attrzp;
- int need_policy = FALSE;
- int err, err2 = 0;
- zfs_fuid_info_t *fuidp = NULL;
- xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
- xoptattr_t *xoap;
- zfs_acl_t *aclp;
- boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- boolean_t fuid_dirtied = B_FALSE;
- boolean_t handle_eadir = B_FALSE;
- sa_bulk_attr_t *bulk, *xattr_bulk;
- int count = 0, xattr_count = 0, bulks = 8;
-
- if (mask == 0)
- return (0);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- ip = ZTOI(zp);
-
- /*
- * If this is a xvattr_t, then get a pointer to the structure of
- * optional attributes. If this is NULL, then we have a vattr_t.
- */
- xoap = xva_getxoptattr(xvap);
- if (xoap != NULL && (mask & ATTR_XVATTR)) {
- if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
- if (!dmu_objset_projectquota_enabled(os) ||
- (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENOTSUP));
- }
-
- projid = xoap->xoa_projid;
- if (unlikely(projid == ZFS_INVALID_PROJID)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID)
- projid = ZFS_INVALID_PROJID;
- else
- need_policy = TRUE;
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) &&
- (xoap->xoa_projinherit !=
- ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) &&
- (!dmu_objset_projectquota_enabled(os) ||
- (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode)))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENOTSUP));
- }
- }
-
- zilog = zfsvfs->z_log;
-
- /*
- * Make sure that if we have ephemeral uid/gid or xvattr specified
- * that file system is at proper version level
- */
-
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (((mask & ATTR_UID) && IS_EPHEMERAL(vap->va_uid)) ||
- ((mask & ATTR_GID) && IS_EPHEMERAL(vap->va_gid)) ||
- (mask & ATTR_XVATTR))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- if (mask & ATTR_SIZE && S_ISDIR(ip->i_mode)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EISDIR));
- }
-
- if (mask & ATTR_SIZE && !S_ISREG(ip->i_mode) && !S_ISFIFO(ip->i_mode)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- tmpxvattr = kmem_alloc(sizeof (xvattr_t), KM_SLEEP);
- xva_init(tmpxvattr);
-
- bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP);
- xattr_bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP);
-
- /*
- * Immutable files can only alter immutable bit and atime
- */
- if ((zp->z_pflags & ZFS_IMMUTABLE) &&
- ((mask & (ATTR_SIZE|ATTR_UID|ATTR_GID|ATTR_MTIME|ATTR_MODE)) ||
- ((mask & ATTR_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
- err = SET_ERROR(EPERM);
- goto out3;
- }
-
- if ((mask & ATTR_SIZE) && (zp->z_pflags & ZFS_READONLY)) {
- err = SET_ERROR(EPERM);
- goto out3;
- }
-
- /*
- * Verify timestamps doesn't overflow 32 bits.
- * ZFS can handle large timestamps, but 32bit syscalls can't
- * handle times greater than 2039. This check should be removed
- * once large timestamps are fully supported.
- */
- if (mask & (ATTR_ATIME | ATTR_MTIME)) {
- if (((mask & ATTR_ATIME) &&
- TIMESPEC_OVERFLOW(&vap->va_atime)) ||
- ((mask & ATTR_MTIME) &&
- TIMESPEC_OVERFLOW(&vap->va_mtime))) {
- err = SET_ERROR(EOVERFLOW);
- goto out3;
- }
- }
-
-top:
- attrzp = NULL;
- aclp = NULL;
-
- /* Can this be moved to before the top label? */
- if (zfs_is_readonly(zfsvfs)) {
- err = SET_ERROR(EROFS);
- goto out3;
- }
-
- /*
- * First validate permissions
- */
-
- if (mask & ATTR_SIZE) {
- err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr);
- if (err)
- goto out3;
-
- /*
- * XXX - Note, we are not providing any open
- * mode flags here (like FNDELAY), so we may
- * block if there are locks present... this
- * should be addressed in openat().
- */
- /* XXX - would it be OK to generate a log record here? */
- err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
- if (err)
- goto out3;
- }
-
- if (mask & (ATTR_ATIME|ATTR_MTIME) ||
- ((mask & ATTR_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
- XVA_ISSET_REQ(xvap, XAT_READONLY) ||
- XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
- XVA_ISSET_REQ(xvap, XAT_OFFLINE) ||
- XVA_ISSET_REQ(xvap, XAT_SPARSE) ||
- XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
- XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) {
- need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
- skipaclchk, cr);
- }
-
- if (mask & (ATTR_UID|ATTR_GID)) {
- int idmask = (mask & (ATTR_UID|ATTR_GID));
- int take_owner;
- int take_group;
-
- /*
- * NOTE: even if a new mode is being set,
- * we may clear S_ISUID/S_ISGID bits.
- */
-
- if (!(mask & ATTR_MODE))
- vap->va_mode = zp->z_mode;
-
- /*
- * Take ownership or chgrp to group we are a member of
- */
-
- take_owner = (mask & ATTR_UID) && (vap->va_uid == crgetuid(cr));
- take_group = (mask & ATTR_GID) &&
- zfs_groupmember(zfsvfs, vap->va_gid, cr);
-
- /*
- * If both ATTR_UID and ATTR_GID are set then take_owner and
- * take_group must both be set in order to allow taking
- * ownership.
- *
- * Otherwise, send the check through secpolicy_vnode_setattr()
- *
- */
-
- if (((idmask == (ATTR_UID|ATTR_GID)) &&
- take_owner && take_group) ||
- ((idmask == ATTR_UID) && take_owner) ||
- ((idmask == ATTR_GID) && take_group)) {
- if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
- skipaclchk, cr) == 0) {
- /*
- * Remove setuid/setgid for non-privileged users
- */
- (void) secpolicy_setid_clear(vap, cr);
- trim_mask = (mask & (ATTR_UID|ATTR_GID));
- } else {
- need_policy = TRUE;
- }
- } else {
- need_policy = TRUE;
- }
- }
-
- mutex_enter(&zp->z_lock);
- oldva.va_mode = zp->z_mode;
- zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
- if (mask & ATTR_XVATTR) {
- /*
- * Update xvattr mask to include only those attributes
- * that are actually changing.
- *
- * the bits will be restored prior to actually setting
- * the attributes so the caller thinks they were set.
- */
- if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
- if (xoap->xoa_appendonly !=
- ((zp->z_pflags & ZFS_APPENDONLY) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_APPENDONLY);
- XVA_SET_REQ(tmpxvattr, XAT_APPENDONLY);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
- if (xoap->xoa_projinherit !=
- ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_PROJINHERIT);
- XVA_SET_REQ(tmpxvattr, XAT_PROJINHERIT);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
- if (xoap->xoa_nounlink !=
- ((zp->z_pflags & ZFS_NOUNLINK) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_NOUNLINK);
- XVA_SET_REQ(tmpxvattr, XAT_NOUNLINK);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
- if (xoap->xoa_immutable !=
- ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
- XVA_SET_REQ(tmpxvattr, XAT_IMMUTABLE);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
- if (xoap->xoa_nodump !=
- ((zp->z_pflags & ZFS_NODUMP) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_NODUMP);
- XVA_SET_REQ(tmpxvattr, XAT_NODUMP);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
- if (xoap->xoa_av_modified !=
- ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
- XVA_SET_REQ(tmpxvattr, XAT_AV_MODIFIED);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
- if ((!S_ISREG(ip->i_mode) &&
- xoap->xoa_av_quarantined) ||
- xoap->xoa_av_quarantined !=
- ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) {
- need_policy = TRUE;
- } else {
- XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
- XVA_SET_REQ(tmpxvattr, XAT_AV_QUARANTINED);
- }
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
- mutex_exit(&zp->z_lock);
- err = SET_ERROR(EPERM);
- goto out3;
- }
-
- if (need_policy == FALSE &&
- (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
- XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
- need_policy = TRUE;
- }
- }
-
- mutex_exit(&zp->z_lock);
-
- if (mask & ATTR_MODE) {
- if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
- err = secpolicy_setid_setsticky_clear(ip, vap,
- &oldva, cr);
- if (err)
- goto out3;
-
- trim_mask |= ATTR_MODE;
- } else {
- need_policy = TRUE;
- }
- }
-
- if (need_policy) {
- /*
- * If trim_mask is set then take ownership
- * has been granted or write_acl is present and user
- * has the ability to modify mode. In that case remove
- * UID|GID and or MODE from mask so that
- * secpolicy_vnode_setattr() doesn't revoke it.
- */
-
- if (trim_mask) {
- saved_mask = vap->va_mask;
- vap->va_mask &= ~trim_mask;
- }
- err = secpolicy_vnode_setattr(cr, ip, vap, &oldva, flags,
- (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
- if (err)
- goto out3;
-
- if (trim_mask)
- vap->va_mask |= saved_mask;
- }
-
- /*
- * secpolicy_vnode_setattr, or take ownership may have
- * changed va_mask
- */
- mask = vap->va_mask;
-
- if ((mask & (ATTR_UID | ATTR_GID)) || projid != ZFS_INVALID_PROJID) {
- handle_eadir = B_TRUE;
- err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
- &xattr_obj, sizeof (xattr_obj));
-
- if (err == 0 && xattr_obj) {
- err = zfs_zget(ZTOZSB(zp), xattr_obj, &attrzp);
- if (err)
- goto out2;
- }
- if (mask & ATTR_UID) {
- new_kuid = zfs_fuid_create(zfsvfs,
- (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
- if (new_kuid != KUID_TO_SUID(ZTOI(zp)->i_uid) &&
- zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT,
- new_kuid)) {
- if (attrzp)
- zrele(attrzp);
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
-
- if (mask & ATTR_GID) {
- new_kgid = zfs_fuid_create(zfsvfs,
- (uint64_t)vap->va_gid, cr, ZFS_GROUP, &fuidp);
- if (new_kgid != KGID_TO_SGID(ZTOI(zp)->i_gid) &&
- zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT,
- new_kgid)) {
- if (attrzp)
- zrele(attrzp);
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
-
- if (projid != ZFS_INVALID_PROJID &&
- zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) {
- if (attrzp)
- zrele(attrzp);
- err = EDQUOT;
- goto out2;
- }
- }
- tx = dmu_tx_create(os);
-
- if (mask & ATTR_MODE) {
- uint64_t pmode = zp->z_mode;
- uint64_t acl_obj;
- new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
-
- if (ZTOZSB(zp)->z_acl_mode == ZFS_ACL_RESTRICTED &&
- !(zp->z_pflags & ZFS_ACL_TRIVIAL)) {
- err = EPERM;
- goto out;
- }
-
- if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)))
- goto out;
-
- mutex_enter(&zp->z_lock);
- if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) {
- /*
- * Are we upgrading ACL from old V0 format
- * to V1 format?
- */
- if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
- zfs_znode_acl_version(zp) ==
- ZFS_ACL_VERSION_INITIAL) {
- dmu_tx_hold_free(tx, acl_obj, 0,
- DMU_OBJECT_END);
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, aclp->z_acl_bytes);
- } else {
- dmu_tx_hold_write(tx, acl_obj, 0,
- aclp->z_acl_bytes);
- }
- } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
- 0, aclp->z_acl_bytes);
- }
- mutex_exit(&zp->z_lock);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- } else {
- if (((mask & ATTR_XVATTR) &&
- XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) ||
- (projid != ZFS_INVALID_PROJID &&
- !(zp->z_pflags & ZFS_PROJID)))
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
- else
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- }
-
- if (attrzp) {
- dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE);
- }
-
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
-
- zfs_sa_upgrade_txholds(tx, zp);
-
- err = dmu_tx_assign(tx, TXG_WAIT);
- if (err)
- goto out;
-
- count = 0;
- /*
- * Set each attribute requested.
- * We group settings according to the locks they need to acquire.
- *
- * Note: you cannot set ctime directly, although it will be
- * updated as a side-effect of calling this function.
- */
-
- if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) {
- /*
- * For the existed object that is upgraded from old system,
- * its on-disk layout has no slot for the project ID attribute.
- * But quota accounting logic needs to access related slots by
- * offset directly. So we need to adjust old objects' layout
- * to make the project ID to some unified and fixed offset.
- */
- if (attrzp)
- err = sa_add_projid(attrzp->z_sa_hdl, tx, projid);
- if (err == 0)
- err = sa_add_projid(zp->z_sa_hdl, tx, projid);
-
- if (unlikely(err == EEXIST))
- err = 0;
- else if (err != 0)
- goto out;
- else
- projid = ZFS_INVALID_PROJID;
- }
-
- if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
- mutex_enter(&zp->z_acl_lock);
- mutex_enter(&zp->z_lock);
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, sizeof (zp->z_pflags));
-
- if (attrzp) {
- if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
- mutex_enter(&attrzp->z_acl_lock);
- mutex_enter(&attrzp->z_lock);
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags,
- sizeof (attrzp->z_pflags));
- if (projid != ZFS_INVALID_PROJID) {
- attrzp->z_projid = projid;
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid,
- sizeof (attrzp->z_projid));
- }
- }
-
- if (mask & (ATTR_UID|ATTR_GID)) {
-
- if (mask & ATTR_UID) {
- ZTOI(zp)->i_uid = SUID_TO_KUID(new_kuid);
- new_uid = zfs_uid_read(ZTOI(zp));
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
- &new_uid, sizeof (new_uid));
- if (attrzp) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_UID(zfsvfs), NULL, &new_uid,
- sizeof (new_uid));
- ZTOI(attrzp)->i_uid = SUID_TO_KUID(new_uid);
- }
- }
-
- if (mask & ATTR_GID) {
- ZTOI(zp)->i_gid = SGID_TO_KGID(new_kgid);
- new_gid = zfs_gid_read(ZTOI(zp));
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs),
- NULL, &new_gid, sizeof (new_gid));
- if (attrzp) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_GID(zfsvfs), NULL, &new_gid,
- sizeof (new_gid));
- ZTOI(attrzp)->i_gid = SGID_TO_KGID(new_kgid);
- }
- }
- if (!(mask & ATTR_MODE)) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs),
- NULL, &new_mode, sizeof (new_mode));
- new_mode = zp->z_mode;
- }
- err = zfs_acl_chown_setattr(zp);
- ASSERT(err == 0);
- if (attrzp) {
- err = zfs_acl_chown_setattr(attrzp);
- ASSERT(err == 0);
- }
- }
-
- if (mask & ATTR_MODE) {
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
- &new_mode, sizeof (new_mode));
- zp->z_mode = ZTOI(zp)->i_mode = new_mode;
- ASSERT3P(aclp, !=, NULL);
- err = zfs_aclset_common(zp, aclp, cr, tx);
- ASSERT0(err);
- if (zp->z_acl_cached)
- zfs_acl_free(zp->z_acl_cached);
- zp->z_acl_cached = aclp;
- aclp = NULL;
- }
-
- if ((mask & ATTR_ATIME) || zp->z_atime_dirty) {
- zp->z_atime_dirty = B_FALSE;
- ZFS_TIME_ENCODE(&ip->i_atime, atime);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
- &atime, sizeof (atime));
- }
-
- if (mask & (ATTR_MTIME | ATTR_SIZE)) {
- ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
- ZTOI(zp)->i_mtime = zpl_inode_timestamp_truncate(
- vap->va_mtime, ZTOI(zp));
-
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
- mtime, sizeof (mtime));
- }
-
- if (mask & (ATTR_CTIME | ATTR_SIZE)) {
- ZFS_TIME_ENCODE(&vap->va_ctime, ctime);
- ZTOI(zp)->i_ctime = zpl_inode_timestamp_truncate(vap->va_ctime,
- ZTOI(zp));
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
- ctime, sizeof (ctime));
- }
-
- if (projid != ZFS_INVALID_PROJID) {
- zp->z_projid = projid;
- SA_ADD_BULK_ATTR(bulk, count,
- SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid,
- sizeof (zp->z_projid));
- }
-
- if (attrzp && mask) {
- SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
- SA_ZPL_CTIME(zfsvfs), NULL, &ctime,
- sizeof (ctime));
- }
-
- /*
- * Do this after setting timestamps to prevent timestamp
- * update from toggling bit
- */
-
- if (xoap && (mask & ATTR_XVATTR)) {
-
- /*
- * restore trimmed off masks
- * so that return masks can be set for caller.
- */
-
- if (XVA_ISSET_REQ(tmpxvattr, XAT_APPENDONLY)) {
- XVA_SET_REQ(xvap, XAT_APPENDONLY);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_NOUNLINK)) {
- XVA_SET_REQ(xvap, XAT_NOUNLINK);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_IMMUTABLE)) {
- XVA_SET_REQ(xvap, XAT_IMMUTABLE);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_NODUMP)) {
- XVA_SET_REQ(xvap, XAT_NODUMP);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_MODIFIED)) {
- XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_QUARANTINED)) {
- XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
- }
- if (XVA_ISSET_REQ(tmpxvattr, XAT_PROJINHERIT)) {
- XVA_SET_REQ(xvap, XAT_PROJINHERIT);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
- ASSERT(S_ISREG(ip->i_mode));
-
- zfs_xvattr_set(zp, xvap, tx);
- }
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- if (mask != 0)
- zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
-
- mutex_exit(&zp->z_lock);
- if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
- mutex_exit(&zp->z_acl_lock);
-
- if (attrzp) {
- if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
- mutex_exit(&attrzp->z_acl_lock);
- mutex_exit(&attrzp->z_lock);
- }
-out:
- if (err == 0 && xattr_count > 0) {
- err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk,
- xattr_count, tx);
- ASSERT(err2 == 0);
- }
-
- if (aclp)
- zfs_acl_free(aclp);
-
- if (fuidp) {
- zfs_fuid_info_free(fuidp);
- fuidp = NULL;
- }
-
- if (err) {
- dmu_tx_abort(tx);
- if (attrzp)
- zrele(attrzp);
- if (err == ERESTART)
- goto top;
- } else {
- if (count > 0)
- err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- dmu_tx_commit(tx);
- if (attrzp) {
- if (err2 == 0 && handle_eadir)
- err2 = zfs_setattr_dir(attrzp);
- zrele(attrzp);
- }
- zfs_inode_update(zp);
- }
-
-out2:
- if (os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
-out3:
- kmem_free(xattr_bulk, sizeof (sa_bulk_attr_t) * bulks);
- kmem_free(bulk, sizeof (sa_bulk_attr_t) * bulks);
- kmem_free(tmpxvattr, sizeof (xvattr_t));
- ZFS_EXIT(zfsvfs);
- return (err);
-}
-
-typedef struct zfs_zlock {
- krwlock_t *zl_rwlock; /* lock we acquired */
- znode_t *zl_znode; /* znode we held */
- struct zfs_zlock *zl_next; /* next in list */
-} zfs_zlock_t;
-
-/*
- * Drop locks and release vnodes that were held by zfs_rename_lock().
- */
-static void
-zfs_rename_unlock(zfs_zlock_t **zlpp)
-{
- zfs_zlock_t *zl;
-
- while ((zl = *zlpp) != NULL) {
- if (zl->zl_znode != NULL)
- zfs_zrele_async(zl->zl_znode);
- rw_exit(zl->zl_rwlock);
- *zlpp = zl->zl_next;
- kmem_free(zl, sizeof (*zl));
- }
-}
-
-/*
- * Search back through the directory tree, using the ".." entries.
- * Lock each directory in the chain to prevent concurrent renames.
- * Fail any attempt to move a directory into one of its own descendants.
- * XXX - z_parent_lock can overlap with map or grow locks
- */
-static int
-zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp)
-{
- zfs_zlock_t *zl;
- znode_t *zp = tdzp;
- uint64_t rootid = ZTOZSB(zp)->z_root;
- uint64_t oidp = zp->z_id;
- krwlock_t *rwlp = &szp->z_parent_lock;
- krw_t rw = RW_WRITER;
-
- /*
- * First pass write-locks szp and compares to zp->z_id.
- * Later passes read-lock zp and compare to zp->z_parent.
- */
- do {
- if (!rw_tryenter(rwlp, rw)) {
- /*
- * Another thread is renaming in this path.
- * Note that if we are a WRITER, we don't have any
- * parent_locks held yet.
- */
- if (rw == RW_READER && zp->z_id > szp->z_id) {
- /*
- * Drop our locks and restart
- */
- zfs_rename_unlock(&zl);
- *zlpp = NULL;
- zp = tdzp;
- oidp = zp->z_id;
- rwlp = &szp->z_parent_lock;
- rw = RW_WRITER;
- continue;
- } else {
- /*
- * Wait for other thread to drop its locks
- */
- rw_enter(rwlp, rw);
- }
- }
-
- zl = kmem_alloc(sizeof (*zl), KM_SLEEP);
- zl->zl_rwlock = rwlp;
- zl->zl_znode = NULL;
- zl->zl_next = *zlpp;
- *zlpp = zl;
-
- if (oidp == szp->z_id) /* We're a descendant of szp */
- return (SET_ERROR(EINVAL));
-
- if (oidp == rootid) /* We've hit the top */
- return (0);
-
- if (rw == RW_READER) { /* i.e. not the first pass */
- int error = zfs_zget(ZTOZSB(zp), oidp, &zp);
- if (error)
- return (error);
- zl->zl_znode = zp;
- }
- (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(ZTOZSB(zp)),
- &oidp, sizeof (oidp));
- rwlp = &zp->z_parent_lock;
- rw = RW_READER;
-
- } while (zp->z_id != sdzp->z_id);
-
- return (0);
-}
-
-/*
- * Move an entry from the provided source directory to the target
- * directory. Change the entry name as indicated.
- *
- * IN: sdzp - Source directory containing the "old entry".
- * snm - Old entry name.
- * tdzp - Target directory to contain the "new entry".
- * tnm - New entry name.
- * cr - credentials of caller.
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * sdzp,tdzp - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp, char *tnm,
- cred_t *cr, int flags)
-{
- znode_t *szp, *tzp;
- zfsvfs_t *zfsvfs = ZTOZSB(sdzp);
- zilog_t *zilog;
- zfs_dirlock_t *sdl, *tdl;
- dmu_tx_t *tx;
- zfs_zlock_t *zl;
- int cmp, serr, terr;
- int error = 0;
- int zflg = 0;
- boolean_t waited = B_FALSE;
-
- if (snm == NULL || tnm == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(sdzp);
- zilog = zfsvfs->z_log;
-
- ZFS_VERIFY_ZP(tdzp);
-
- /*
- * We check i_sb because snapshots and the ctldir must have different
- * super blocks.
- */
- if (ZTOI(tdzp)->i_sb != ZTOI(sdzp)->i_sb ||
- zfsctl_is_node(ZTOI(tdzp))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EXDEV));
- }
-
- if (zfsvfs->z_utf8 && u8_validate(tnm,
- strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
-
- if (flags & FIGNORECASE)
- zflg |= ZCILOOK;
-
-top:
- szp = NULL;
- tzp = NULL;
- zl = NULL;
-
- /*
- * This is to prevent the creation of links into attribute space
- * by renaming a linked file into/outof an attribute directory.
- * See the comment in zfs_link() for why this is considered bad.
- */
- if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Lock source and target directory entries. To prevent deadlock,
- * a lock ordering must be defined. We lock the directory with
- * the smallest object id first, or if it's a tie, the one with
- * the lexically first name.
- */
- if (sdzp->z_id < tdzp->z_id) {
- cmp = -1;
- } else if (sdzp->z_id > tdzp->z_id) {
- cmp = 1;
- } else {
- /*
- * First compare the two name arguments without
- * considering any case folding.
- */
- int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER);
-
- cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error);
- ASSERT(error == 0 || !zfsvfs->z_utf8);
- if (cmp == 0) {
- /*
- * POSIX: "If the old argument and the new argument
- * both refer to links to the same existing file,
- * the rename() function shall return successfully
- * and perform no other action."
- */
- ZFS_EXIT(zfsvfs);
- return (0);
- }
- /*
- * If the file system is case-folding, then we may
- * have some more checking to do. A case-folding file
- * system is either supporting mixed case sensitivity
- * access or is completely case-insensitive. Note
- * that the file system is always case preserving.
- *
- * In mixed sensitivity mode case sensitive behavior
- * is the default. FIGNORECASE must be used to
- * explicitly request case insensitive behavior.
- *
- * If the source and target names provided differ only
- * by case (e.g., a request to rename 'tim' to 'Tim'),
- * we will treat this as a special case in the
- * case-insensitive mode: as long as the source name
- * is an exact match, we will allow this to proceed as
- * a name-change request.
- */
- if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
- (zfsvfs->z_case == ZFS_CASE_MIXED &&
- flags & FIGNORECASE)) &&
- u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST,
- &error) == 0) {
- /*
- * case preserving rename request, require exact
- * name matches
- */
- zflg |= ZCIEXACT;
- zflg &= ~ZCILOOK;
- }
- }
-
- /*
- * If the source and destination directories are the same, we should
- * grab the z_name_lock of that directory only once.
- */
- if (sdzp == tdzp) {
- zflg |= ZHAVELOCK;
- rw_enter(&sdzp->z_name_lock, RW_READER);
- }
-
- if (cmp < 0) {
- serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp,
- ZEXISTS | zflg, NULL, NULL);
- terr = zfs_dirent_lock(&tdl,
- tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL);
- } else {
- terr = zfs_dirent_lock(&tdl,
- tdzp, tnm, &tzp, zflg, NULL, NULL);
- serr = zfs_dirent_lock(&sdl,
- sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg,
- NULL, NULL);
- }
-
- if (serr) {
- /*
- * Source entry invalid or not there.
- */
- if (!terr) {
- zfs_dirent_unlock(tdl);
- if (tzp)
- zrele(tzp);
- }
-
- if (sdzp == tdzp)
- rw_exit(&sdzp->z_name_lock);
-
- if (strcmp(snm, "..") == 0)
- serr = EINVAL;
- ZFS_EXIT(zfsvfs);
- return (serr);
- }
- if (terr) {
- zfs_dirent_unlock(sdl);
- zrele(szp);
-
- if (sdzp == tdzp)
- rw_exit(&sdzp->z_name_lock);
-
- if (strcmp(tnm, "..") == 0)
- terr = EINVAL;
- ZFS_EXIT(zfsvfs);
- return (terr);
- }
-
- /*
- * If we are using project inheritance, means if the directory has
- * ZFS_PROJINHERIT set, then its descendant directories will inherit
- * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
- * such case, we only allow renames into our tree when the project
- * IDs are the same.
- */
- if (tdzp->z_pflags & ZFS_PROJINHERIT &&
- tdzp->z_projid != szp->z_projid) {
- error = SET_ERROR(EXDEV);
- goto out;
- }
-
- /*
- * Must have write access at the source to remove the old entry
- * and write access at the target to create the new entry.
- * Note that if target and source are the same, this can be
- * done in a single check.
- */
-
- if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)))
- goto out;
-
- if (S_ISDIR(ZTOI(szp)->i_mode)) {
- /*
- * Check to make sure rename is valid.
- * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
- */
- if ((error = zfs_rename_lock(szp, tdzp, sdzp, &zl)))
- goto out;
- }
-
- /*
- * Does target exist?
- */
- if (tzp) {
- /*
- * Source and target must be the same type.
- */
- if (S_ISDIR(ZTOI(szp)->i_mode)) {
- if (!S_ISDIR(ZTOI(tzp)->i_mode)) {
- error = SET_ERROR(ENOTDIR);
- goto out;
- }
- } else {
- if (S_ISDIR(ZTOI(tzp)->i_mode)) {
- error = SET_ERROR(EISDIR);
- goto out;
- }
- }
- /*
- * POSIX dictates that when the source and target
- * entries refer to the same file object, rename
- * must do nothing and exit without error.
- */
- if (szp->z_id == tzp->z_id) {
- error = 0;
- goto out;
- }
- }
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
- dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
- if (sdzp != tdzp) {
- dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, tdzp);
- }
- if (tzp) {
- dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, tzp);
- }
-
- zfs_sa_upgrade_txholds(tx, szp);
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- if (zl != NULL)
- zfs_rename_unlock(&zl);
- zfs_dirent_unlock(sdl);
- zfs_dirent_unlock(tdl);
-
- if (sdzp == tdzp)
- rw_exit(&sdzp->z_name_lock);
-
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- zrele(szp);
- if (tzp)
- zrele(tzp);
- goto top;
- }
- dmu_tx_abort(tx);
- zrele(szp);
- if (tzp)
- zrele(tzp);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (tzp) /* Attempt to remove the existing target */
- error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL);
-
- if (error == 0) {
- error = zfs_link_create(tdl, szp, tx, ZRENAMING);
- if (error == 0) {
- szp->z_pflags |= ZFS_AV_MODIFIED;
- if (tdzp->z_pflags & ZFS_PROJINHERIT)
- szp->z_pflags |= ZFS_PROJINHERIT;
-
- error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
- (void *)&szp->z_pflags, sizeof (uint64_t), tx);
- ASSERT0(error);
-
- error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL);
- if (error == 0) {
- zfs_log_rename(zilog, tx, TX_RENAME |
- (flags & FIGNORECASE ? TX_CI : 0), sdzp,
- sdl->dl_name, tdzp, tdl->dl_name, szp);
- } else {
- /*
- * At this point, we have successfully created
- * the target name, but have failed to remove
- * the source name. Since the create was done
- * with the ZRENAMING flag, there are
- * complications; for one, the link count is
- * wrong. The easiest way to deal with this
- * is to remove the newly created target, and
- * return the original error. This must
- * succeed; fortunately, it is very unlikely to
- * fail, since we just created it.
- */
- VERIFY3U(zfs_link_destroy(tdl, szp, tx,
- ZRENAMING, NULL), ==, 0);
- }
- } else {
- /*
- * If we had removed the existing target, subsequent
- * call to zfs_link_create() to add back the same entry
- * but, the new dnode (szp) should not fail.
- */
- ASSERT(tzp == NULL);
- }
- }
-
- dmu_tx_commit(tx);
-out:
- if (zl != NULL)
- zfs_rename_unlock(&zl);
-
- zfs_dirent_unlock(sdl);
- zfs_dirent_unlock(tdl);
-
- zfs_inode_update(sdzp);
- if (sdzp == tdzp)
- rw_exit(&sdzp->z_name_lock);
-
- if (sdzp != tdzp)
- zfs_inode_update(tdzp);
-
- zfs_inode_update(szp);
- zrele(szp);
- if (tzp) {
- zfs_inode_update(tzp);
- zrele(tzp);
- }
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Insert the indicated symbolic reference entry into the directory.
- *
- * IN: dzp - Directory to contain new symbolic link.
- * name - Name of directory entry in dip.
- * vap - Attributes of new entry.
- * link - Name for new symlink entry.
- * cr - credentials of caller.
- * flags - case flags
- *
- * OUT: zpp - Znode for new symbolic link.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dip - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_symlink(znode_t *dzp, char *name, vattr_t *vap, char *link,
- znode_t **zpp, cred_t *cr, int flags)
-{
- znode_t *zp;
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- zfsvfs_t *zfsvfs = ZTOZSB(dzp);
- zilog_t *zilog;
- uint64_t len = strlen(link);
- int error;
- int zflg = ZNEW;
- zfs_acl_ids_t acl_ids;
- boolean_t fuid_dirtied;
- uint64_t txtype = TX_SYMLINK;
- boolean_t waited = B_FALSE;
-
- ASSERT(S_ISLNK(vap->va_mode));
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- zilog = zfsvfs->z_log;
-
- if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
- if (flags & FIGNORECASE)
- zflg |= ZCILOOK;
-
- if (len > MAXPATHLEN) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENAMETOOLONG));
- }
-
- if ((error = zfs_acl_ids_create(dzp, 0,
- vap, cr, NULL, &acl_ids)) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-top:
- *zpp = NULL;
-
- /*
- * Attempt to lock directory; fail if entry already exists.
- */
- error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL);
- if (error) {
- zfs_acl_ids_free(&acl_ids);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- zfs_acl_ids_free(&acl_ids);
- zfs_dirent_unlock(dl);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, ZFS_DEFAULT_PROJID)) {
- zfs_acl_ids_free(&acl_ids);
- zfs_dirent_unlock(dl);
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EDQUOT));
- }
- tx = dmu_tx_create(zfsvfs->z_os);
- fuid_dirtied = zfsvfs->z_fuid_dirty;
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
- dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE + len);
- dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
- if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
- dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
- acl_ids.z_aclp->z_acl_bytes);
- }
- if (fuid_dirtied)
- zfs_fuid_txhold(zfsvfs, tx);
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- goto top;
- }
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- /*
- * Create a new object for the symlink.
- * for version 4 ZPL datsets the symlink will be an SA attribute
- */
- zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
-
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
-
- mutex_enter(&zp->z_lock);
- if (zp->z_is_sa)
- error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs),
- link, len, tx);
- else
- zfs_sa_symlink(zp, link, len, tx);
- mutex_exit(&zp->z_lock);
-
- zp->z_size = len;
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
- &zp->z_size, sizeof (zp->z_size), tx);
- /*
- * Insert the new object into the directory.
- */
- error = zfs_link_create(dl, zp, tx, ZNEW);
- if (error != 0) {
- zfs_znode_delete(zp, tx);
- remove_inode_hash(ZTOI(zp));
- } else {
- if (flags & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
-
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- }
-
- zfs_acl_ids_free(&acl_ids);
-
- dmu_tx_commit(tx);
-
- zfs_dirent_unlock(dl);
-
- if (error == 0) {
- *zpp = zp;
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
- } else {
- zrele(zp);
- }
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Return, in the buffer contained in the provided uio structure,
- * the symbolic path referred to by ip.
- *
- * IN: ip - inode of symbolic link
- * uio - structure to contain the link path.
- * cr - credentials of caller.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * ip - atime updated
- */
-/* ARGSUSED */
-int
-zfs_readlink(struct inode *ip, uio_t *uio, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- mutex_enter(&zp->z_lock);
- if (zp->z_is_sa)
- error = sa_lookup_uio(zp->z_sa_hdl,
- SA_ZPL_SYMLINK(zfsvfs), uio);
- else
- error = zfs_sa_readlink(zp, uio);
- mutex_exit(&zp->z_lock);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Insert a new entry into directory tdzp referencing szp.
- *
- * IN: tdzp - Directory to contain new entry.
- * szp - znode of new entry.
- * name - name of new entry.
- * cr - credentials of caller.
- * flags - case flags.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * tdzp - ctime|mtime updated
- * szp - ctime updated
- */
-/* ARGSUSED */
-int
-zfs_link(znode_t *tdzp, znode_t *szp, char *name, cred_t *cr,
- int flags)
-{
- struct inode *sip = ZTOI(szp);
- znode_t *tzp;
- zfsvfs_t *zfsvfs = ZTOZSB(tdzp);
- zilog_t *zilog;
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- int error;
- int zf = ZNEW;
- uint64_t parent;
- uid_t owner;
- boolean_t waited = B_FALSE;
- boolean_t is_tmpfile = 0;
- uint64_t txg;
-#ifdef HAVE_TMPFILE
- is_tmpfile = (sip->i_nlink == 0 && (sip->i_state & I_LINKABLE));
-#endif
- ASSERT(S_ISDIR(ZTOI(tdzp)->i_mode));
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(tdzp);
- zilog = zfsvfs->z_log;
-
- /*
- * POSIX dictates that we return EPERM here.
- * Better choices include ENOTSUP or EISDIR.
- */
- if (S_ISDIR(sip->i_mode)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- ZFS_VERIFY_ZP(szp);
-
- /*
- * If we are using project inheritance, means if the directory has
- * ZFS_PROJINHERIT set, then its descendant directories will inherit
- * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
- * such case, we only allow hard link creation in our tree when the
- * project IDs are the same.
- */
- if (tdzp->z_pflags & ZFS_PROJINHERIT &&
- tdzp->z_projid != szp->z_projid) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EXDEV));
- }
-
- /*
- * We check i_sb because snapshots and the ctldir must have different
- * super blocks.
- */
- if (sip->i_sb != ZTOI(tdzp)->i_sb || zfsctl_is_node(sip)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EXDEV));
- }
-
- /* Prevent links to .zfs/shares files */
-
- if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
- &parent, sizeof (uint64_t))) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- if (parent == zfsvfs->z_shares_dir) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if (zfsvfs->z_utf8 && u8_validate(name,
- strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
- }
- if (flags & FIGNORECASE)
- zf |= ZCILOOK;
-
- /*
- * We do not support links between attributes and non-attributes
- * because of the potential security risk of creating links
- * into "normal" file space in order to circumvent restrictions
- * imposed in attribute space.
- */
- if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- owner = zfs_fuid_map_id(zfsvfs, KUID_TO_SUID(sip->i_uid),
- cr, ZFS_OWNER);
- if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
-top:
- /*
- * Attempt to lock directory; fail if entry already exists.
- */
- error = zfs_dirent_lock(&dl, tdzp, name, &tzp, zf, NULL, NULL);
- if (error) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name);
- if (is_tmpfile)
- dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
-
- zfs_sa_upgrade_txholds(tx, szp);
- zfs_sa_upgrade_txholds(tx, tdzp);
- error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
- if (error) {
- zfs_dirent_unlock(dl);
- if (error == ERESTART) {
- waited = B_TRUE;
- dmu_tx_wait(tx);
- dmu_tx_abort(tx);
- goto top;
- }
- dmu_tx_abort(tx);
- ZFS_EXIT(zfsvfs);
- return (error);
- }
- /* unmark z_unlinked so zfs_link_create will not reject */
- if (is_tmpfile)
- szp->z_unlinked = B_FALSE;
- error = zfs_link_create(dl, szp, tx, 0);
-
- if (error == 0) {
- uint64_t txtype = TX_LINK;
- /*
- * tmpfile is created to be in z_unlinkedobj, so remove it.
- * Also, we don't log in ZIL, because all previous file
- * operation on the tmpfile are ignored by ZIL. Instead we
- * always wait for txg to sync to make sure all previous
- * operation are sync safe.
- */
- if (is_tmpfile) {
- VERIFY(zap_remove_int(zfsvfs->z_os,
- zfsvfs->z_unlinkedobj, szp->z_id, tx) == 0);
- } else {
- if (flags & FIGNORECASE)
- txtype |= TX_CI;
- zfs_log_link(zilog, tx, txtype, tdzp, szp, name);
- }
- } else if (is_tmpfile) {
- /* restore z_unlinked since when linking failed */
- szp->z_unlinked = B_TRUE;
- }
- txg = dmu_tx_get_txg(tx);
- dmu_tx_commit(tx);
-
- zfs_dirent_unlock(dl);
-
- if (!is_tmpfile && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- if (is_tmpfile && zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED)
- txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), txg);
-
- zfs_inode_update(tdzp);
- zfs_inode_update(szp);
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-static void
-zfs_putpage_commit_cb(void *arg)
-{
- struct page *pp = arg;
-
- ClearPageError(pp);
- end_page_writeback(pp);
-}
-
-/*
- * Push a page out to disk, once the page is on stable storage the
- * registered commit callback will be run as notification of completion.
- *
- * IN: ip - page mapped for inode.
- * pp - page to push (page is locked)
- * wbc - writeback control data
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * ip - ctime|mtime updated
- */
-/* ARGSUSED */
-int
-zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- loff_t offset;
- loff_t pgoff;
- unsigned int pglen;
- dmu_tx_t *tx;
- caddr_t va;
- int err = 0;
- uint64_t mtime[2], ctime[2];
- sa_bulk_attr_t bulk[3];
- int cnt = 0;
- struct address_space *mapping;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- ASSERT(PageLocked(pp));
-
- pgoff = page_offset(pp); /* Page byte-offset in file */
- offset = i_size_read(ip); /* File length in bytes */
- pglen = MIN(PAGE_SIZE, /* Page length in bytes */
- P2ROUNDUP(offset, PAGE_SIZE)-pgoff);
-
- /* Page is beyond end of file */
- if (pgoff >= offset) {
- unlock_page(pp);
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /* Truncate page length to end of file */
- if (pgoff + pglen > offset)
- pglen = offset - pgoff;
-
-#if 0
- /*
- * FIXME: Allow mmap writes past its quota. The correct fix
- * is to register a page_mkwrite() handler to count the page
- * against its quota when it is about to be dirtied.
- */
- if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT,
- KUID_TO_SUID(ip->i_uid)) ||
- zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT,
- KGID_TO_SGID(ip->i_gid)) ||
- (zp->z_projid != ZFS_DEFAULT_PROJID &&
- zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
- zp->z_projid))) {
- err = EDQUOT;
- }
-#endif
-
- /*
- * The ordering here is critical and must adhere to the following
- * rules in order to avoid deadlocking in either zfs_read() or
- * zfs_free_range() due to a lock inversion.
- *
- * 1) The page must be unlocked prior to acquiring the range lock.
- * This is critical because zfs_read() calls find_lock_page()
- * which may block on the page lock while holding the range lock.
- *
- * 2) Before setting or clearing write back on a page the range lock
- * must be held in order to prevent a lock inversion with the
- * zfs_free_range() function.
- *
- * This presents a problem because upon entering this function the
- * page lock is already held. To safely acquire the range lock the
- * page lock must be dropped. This creates a window where another
- * process could truncate, invalidate, dirty, or write out the page.
- *
- * Therefore, after successfully reacquiring the range and page locks
- * the current page state is checked. In the common case everything
- * will be as is expected and it can be written out. However, if
- * the page state has changed it must be handled accordingly.
- */
- mapping = pp->mapping;
- redirty_page_for_writepage(wbc, pp);
- unlock_page(pp);
-
- zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock,
- pgoff, pglen, RL_WRITER);
- lock_page(pp);
-
- /* Page mapping changed or it was no longer dirty, we're done */
- if (unlikely((mapping != pp->mapping) || !PageDirty(pp))) {
- unlock_page(pp);
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /* Another process started write block if required */
- if (PageWriteback(pp)) {
- unlock_page(pp);
- zfs_rangelock_exit(lr);
-
- if (wbc->sync_mode != WB_SYNC_NONE) {
- if (PageWriteback(pp))
- wait_on_page_bit(pp, PG_writeback);
- }
-
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /* Clear the dirty flag the required locks are held */
- if (!clear_page_dirty_for_io(pp)) {
- unlock_page(pp);
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /*
- * Counterpart for redirty_page_for_writepage() above. This page
- * was in fact not skipped and should not be counted as if it were.
- */
- wbc->pages_skipped--;
- set_page_writeback(pp);
- unlock_page(pp);
-
- tx = dmu_tx_create(zfsvfs->z_os);
- dmu_tx_hold_write(tx, zp->z_id, pgoff, pglen);
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
-
- err = dmu_tx_assign(tx, TXG_NOWAIT);
- if (err != 0) {
- if (err == ERESTART)
- dmu_tx_wait(tx);
-
- dmu_tx_abort(tx);
- __set_page_dirty_nobuffers(pp);
- ClearPageError(pp);
- end_page_writeback(pp);
- zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
- return (err);
- }
-
- va = kmap(pp);
- ASSERT3U(pglen, <=, PAGE_SIZE);
- dmu_write(zfsvfs->z_os, zp->z_id, pgoff, pglen, va, tx);
- kunmap(pp);
-
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(zfsvfs), NULL,
- &zp->z_pflags, 8);
-
- /* Preserve the mtime and ctime provided by the inode */
- ZFS_TIME_ENCODE(&ip->i_mtime, mtime);
- ZFS_TIME_ENCODE(&ip->i_ctime, ctime);
- zp->z_atime_dirty = B_FALSE;
- zp->z_seq++;
-
- err = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx);
-
- zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, pgoff, pglen, 0,
- zfs_putpage_commit_cb, pp);
- dmu_tx_commit(tx);
-
- zfs_rangelock_exit(lr);
-
- if (wbc->sync_mode != WB_SYNC_NONE) {
- /*
- * Note that this is rarely called under writepages(), because
- * writepages() normally handles the entire commit for
- * performance reasons.
- */
- zil_commit(zfsvfs->z_log, zp->z_id);
- }
-
- ZFS_EXIT(zfsvfs);
- return (err);
-}
-
-/*
- * Update the system attributes when the inode has been dirtied. For the
- * moment we only update the mode, atime, mtime, and ctime.
- */
-int
-zfs_dirty_inode(struct inode *ip, int flags)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- dmu_tx_t *tx;
- uint64_t mode, atime[2], mtime[2], ctime[2];
- sa_bulk_attr_t bulk[4];
- int error = 0;
- int cnt = 0;
-
- if (zfs_is_readonly(zfsvfs) || dmu_objset_is_snapshot(zfsvfs->z_os))
- return (0);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
-#ifdef I_DIRTY_TIME
- /*
- * This is the lazytime semantic introduced in Linux 4.0
- * This flag will only be called from update_time when lazytime is set.
- * (Note, I_DIRTY_SYNC will also set if not lazytime)
- * Fortunately mtime and ctime are managed within ZFS itself, so we
- * only need to dirty atime.
- */
- if (flags == I_DIRTY_TIME) {
- zp->z_atime_dirty = B_TRUE;
- goto out;
- }
-#endif
-
- tx = dmu_tx_create(zfsvfs->z_os);
-
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
-
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- goto out;
- }
-
- mutex_enter(&zp->z_lock);
- zp->z_atime_dirty = B_FALSE;
-
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16);
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
- SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
-
- /* Preserve the mode, mtime and ctime provided by the inode */
- ZFS_TIME_ENCODE(&ip->i_atime, atime);
- ZFS_TIME_ENCODE(&ip->i_mtime, mtime);
- ZFS_TIME_ENCODE(&ip->i_ctime, ctime);
- mode = ip->i_mode;
-
- zp->z_mode = mode;
-
- error = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx);
- mutex_exit(&zp->z_lock);
-
- dmu_tx_commit(tx);
-out:
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*ARGSUSED*/
-void
-zfs_inactive(struct inode *ip)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- uint64_t atime[2];
- int error;
- int need_unlock = 0;
-
- /* Only read lock if we haven't already write locked, e.g. rollback */
- if (!RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)) {
- need_unlock = 1;
- rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER);
- }
- if (zp->z_sa_hdl == NULL) {
- if (need_unlock)
- rw_exit(&zfsvfs->z_teardown_inactive_lock);
- return;
- }
-
- if (zp->z_atime_dirty && zp->z_unlinked == B_FALSE) {
- dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
-
- dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- zfs_sa_upgrade_txholds(tx, zp);
- error = dmu_tx_assign(tx, TXG_WAIT);
- if (error) {
- dmu_tx_abort(tx);
- } else {
- ZFS_TIME_ENCODE(&ip->i_atime, atime);
- mutex_enter(&zp->z_lock);
- (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs),
- (void *)&atime, sizeof (atime), tx);
- zp->z_atime_dirty = B_FALSE;
- mutex_exit(&zp->z_lock);
- dmu_tx_commit(tx);
- }
- }
-
- zfs_zinactive(zp);
- if (need_unlock)
- rw_exit(&zfsvfs->z_teardown_inactive_lock);
-}
-
-/*
- * Fill pages with data from the disk.
- */
-static int
-zfs_fillpage(struct inode *ip, struct page *pl[], int nr_pages)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- objset_t *os;
- struct page *cur_pp;
- u_offset_t io_off, total;
- size_t io_len;
- loff_t i_size;
- unsigned page_idx;
- int err;
-
- os = zfsvfs->z_os;
- io_len = nr_pages << PAGE_SHIFT;
- i_size = i_size_read(ip);
- io_off = page_offset(pl[0]);
-
- if (io_off + io_len > i_size)
- io_len = i_size - io_off;
-
- /*
- * Iterate over list of pages and read each page individually.
- */
- page_idx = 0;
- for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
- caddr_t va;
-
- cur_pp = pl[page_idx++];
- va = kmap(cur_pp);
- err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va,
- DMU_READ_PREFETCH);
- kunmap(cur_pp);
- if (err) {
- /* convert checksum errors into IO errors */
- if (err == ECKSUM)
- err = SET_ERROR(EIO);
- return (err);
- }
- }
-
- return (0);
-}
-
-/*
- * Uses zfs_fillpage to read data from the file and fill the pages.
- *
- * IN: ip - inode of file to get data from.
- * pl - list of pages to read
- * nr_pages - number of pages to read
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * vp - atime updated
- */
-/* ARGSUSED */
-int
-zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int err;
-
- if (pl == NULL)
- return (0);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- err = zfs_fillpage(ip, pl, nr_pages);
-
- ZFS_EXIT(zfsvfs);
- return (err);
-}
-
-/*
- * Check ZFS specific permissions to memory map a section of a file.
- *
- * IN: ip - inode of the file to mmap
- * off - file offset
- * addrp - start address in memory region
- * len - length of memory region
- * vm_flags- address flags
- *
- * RETURN: 0 if success
- * error code if failure
- */
-/*ARGSUSED*/
-int
-zfs_map(struct inode *ip, offset_t off, caddr_t *addrp, size_t len,
- unsigned long vm_flags)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((vm_flags & VM_WRITE) && (zp->z_pflags &
- (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EPERM));
- }
-
- if ((vm_flags & (VM_READ | VM_EXEC)) &&
- (zp->z_pflags & ZFS_AV_QUARANTINED)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EACCES));
- }
-
- if (off < 0 || len > MAXOFFSET_T - off) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENXIO));
- }
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*
- * Free or allocate space in a file. Currently, this function only
- * supports the `F_FREESP' command. However, this command is somewhat
- * misnamed, as its functionality includes the ability to allocate as
- * well as free space.
- *
- * IN: zp - znode of file to free data in.
- * cmd - action to take (only F_FREESP supported).
- * bfp - section of file to free/alloc.
- * flag - current file open mode flags.
- * offset - current file offset.
- * cr - credentials of caller.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * zp - ctime|mtime updated
- */
-/* ARGSUSED */
-int
-zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
- offset_t offset, cred_t *cr)
-{
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- uint64_t off, len;
- int error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if (cmd != F_FREESP) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Callers might not be able to detect properly that we are read-only,
- * so check it explicitly here.
- */
- if (zfs_is_readonly(zfsvfs)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EROFS));
- }
-
- if (bfp->l_len < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- /*
- * Permissions aren't checked on Solaris because on this OS
- * zfs_space() can only be called with an opened file handle.
- * On Linux we can get here through truncate_range() which
- * operates directly on inodes, so we need to check access rights.
- */
- if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- off = bfp->l_start;
- len = bfp->l_len; /* 0 means from off to end of file */
-
- error = zfs_freesp(zp, off, len, flag, TRUE);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*ARGSUSED*/
-int
-zfs_fid(struct inode *ip, fid_t *fidp)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- uint32_t gen;
- uint64_t gen64;
- uint64_t object = zp->z_id;
- zfid_short_t *zfid;
- int size, i, error;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs),
- &gen64, sizeof (uint64_t))) != 0) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- gen = (uint32_t)gen64;
-
- size = SHORT_FID_LEN;
-
- zfid = (zfid_short_t *)fidp;
-
- zfid->zf_len = size;
-
- for (i = 0; i < sizeof (zfid->zf_object); i++)
- zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
-
- /* Must have a non-zero generation number to distinguish from .zfs */
- if (gen == 0)
- gen = 1;
- for (i = 0; i < sizeof (zfid->zf_gen); i++)
- zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
-
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*ARGSUSED*/
-int
-zfs_getsecattr(struct inode *ip, vsecattr_t *vsecp, int flag, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int error;
- boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- error = zfs_getacl(zp, vsecp, skipaclchk, cr);
- ZFS_EXIT(zfsvfs);
-
- return (error);
-}
-
-/*ARGSUSED*/
-int
-zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
-{
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- int error;
- boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- zilog_t *zilog = zfsvfs->z_log;
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
-
- error = zfs_setacl(zp, vsecp, skipaclchk, cr);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-#ifdef HAVE_UIO_ZEROCOPY
-/*
- * The smallest read we may consider to loan out an arcbuf.
- * This must be a power of 2.
- */
-int zcr_blksz_min = (1 << 10); /* 1K */
-/*
- * If set to less than the file block size, allow loaning out of an
- * arcbuf for a partial block read. This must be a power of 2.
- */
-int zcr_blksz_max = (1 << 17); /* 128K */
-
-/*ARGSUSED*/
-static int
-zfs_reqzcbuf(struct inode *ip, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int max_blksz = zfsvfs->z_max_blksz;
- uio_t *uio = &xuio->xu_uio;
- ssize_t size = uio->uio_resid;
- offset_t offset = uio->uio_loffset;
- int blksz;
- int fullblk, i;
- arc_buf_t *abuf;
- ssize_t maxsize;
- int preamble, postamble;
-
- if (xuio->xu_type != UIOTYPE_ZEROCOPY)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
- switch (ioflag) {
- case UIO_WRITE:
- /*
- * Loan out an arc_buf for write if write size is bigger than
- * max_blksz, and the file's block size is also max_blksz.
- */
- blksz = max_blksz;
- if (size < blksz || zp->z_blksz != blksz) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
- /*
- * Caller requests buffers for write before knowing where the
- * write offset might be (e.g. NFS TCP write).
- */
- if (offset == -1) {
- preamble = 0;
- } else {
- preamble = P2PHASE(offset, blksz);
- if (preamble) {
- preamble = blksz - preamble;
- size -= preamble;
- }
- }
-
- postamble = P2PHASE(size, blksz);
- size -= postamble;
-
- fullblk = size / blksz;
- (void) dmu_xuio_init(xuio,
- (preamble != 0) + fullblk + (postamble != 0));
-
- /*
- * Have to fix iov base/len for partial buffers. They
- * currently represent full arc_buf's.
- */
- if (preamble) {
- /* data begins in the middle of the arc_buf */
- abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- blksz);
- ASSERT(abuf);
- (void) dmu_xuio_add(xuio, abuf,
- blksz - preamble, preamble);
- }
-
- for (i = 0; i < fullblk; i++) {
- abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- blksz);
- ASSERT(abuf);
- (void) dmu_xuio_add(xuio, abuf, 0, blksz);
- }
-
- if (postamble) {
- /* data ends in the middle of the arc_buf */
- abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
- blksz);
- ASSERT(abuf);
- (void) dmu_xuio_add(xuio, abuf, 0, postamble);
- }
- break;
- case UIO_READ:
- /*
- * Loan out an arc_buf for read if the read size is larger than
- * the current file block size. Block alignment is not
- * considered. Partial arc_buf will be loaned out for read.
- */
- blksz = zp->z_blksz;
- if (blksz < zcr_blksz_min)
- blksz = zcr_blksz_min;
- if (blksz > zcr_blksz_max)
- blksz = zcr_blksz_max;
- /* avoid potential complexity of dealing with it */
- if (blksz > max_blksz) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- maxsize = zp->z_size - uio->uio_loffset;
- if (size > maxsize)
- size = maxsize;
-
- if (size < blksz) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
- break;
- default:
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
-
- uio->uio_extflg = UIO_XUIO;
- XUIO_XUZC_RW(xuio) = ioflag;
- ZFS_EXIT(zfsvfs);
- return (0);
-}
-
-/*ARGSUSED*/
-static int
-zfs_retzcbuf(struct inode *ip, xuio_t *xuio, cred_t *cr)
-{
- int i;
- arc_buf_t *abuf;
- int ioflag = XUIO_XUZC_RW(xuio);
-
- ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY);
-
- i = dmu_xuio_cnt(xuio);
- while (i-- > 0) {
- abuf = dmu_xuio_arcbuf(xuio, i);
- /*
- * if abuf == NULL, it must be a write buffer
- * that has been returned in zfs_write().
- */
- if (abuf)
- dmu_return_arcbuf(abuf);
- ASSERT(abuf || ioflag == UIO_WRITE);
- }
-
- dmu_xuio_fini(xuio);
- return (0);
-}
-#endif /* HAVE_UIO_ZEROCOPY */
-
-#if defined(_KERNEL)
-EXPORT_SYMBOL(zfs_open);
-EXPORT_SYMBOL(zfs_close);
-EXPORT_SYMBOL(zfs_read);
-EXPORT_SYMBOL(zfs_write);
-EXPORT_SYMBOL(zfs_access);
-EXPORT_SYMBOL(zfs_lookup);
-EXPORT_SYMBOL(zfs_create);
-EXPORT_SYMBOL(zfs_tmpfile);
-EXPORT_SYMBOL(zfs_remove);
-EXPORT_SYMBOL(zfs_mkdir);
-EXPORT_SYMBOL(zfs_rmdir);
-EXPORT_SYMBOL(zfs_readdir);
-EXPORT_SYMBOL(zfs_fsync);
-EXPORT_SYMBOL(zfs_getattr_fast);
-EXPORT_SYMBOL(zfs_setattr);
-EXPORT_SYMBOL(zfs_rename);
-EXPORT_SYMBOL(zfs_symlink);
-EXPORT_SYMBOL(zfs_readlink);
-EXPORT_SYMBOL(zfs_link);
-EXPORT_SYMBOL(zfs_inactive);
-EXPORT_SYMBOL(zfs_space);
-EXPORT_SYMBOL(zfs_fid);
-EXPORT_SYMBOL(zfs_getsecattr);
-EXPORT_SYMBOL(zfs_setsecattr);
-EXPORT_SYMBOL(zfs_getpage);
-EXPORT_SYMBOL(zfs_putpage);
-EXPORT_SYMBOL(zfs_dirty_inode);
-EXPORT_SYMBOL(zfs_map);
-
-/* BEGIN CSTYLED */
-module_param(zfs_delete_blocks, ulong, 0644);
-MODULE_PARM_DESC(zfs_delete_blocks, "Delete files larger than N blocks async");
-module_param(zfs_read_chunk_size, ulong, 0644);
-MODULE_PARM_DESC(zfs_read_chunk_size, "Bytes to read per chunk");
-/* END CSTYLED */
-
-#endif
--- /dev/null
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
+ * Copyright 2017 Nexenta Systems, Inc.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+/* Portions Copyright 2010 Robert Milkowski */
+
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/sysmacros.h>
+#include <sys/vfs.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/taskq.h>
+#include <sys/uio.h>
+#include <sys/vmsystm.h>
+#include <sys/atomic.h>
+#include <sys/pathname.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/fs/zfs.h>
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/dbuf.h>
+#include <sys/zap.h>
+#include <sys/sa.h>
+#include <sys/policy.h>
+#include <sys/sunddi.h>
+#include <sys/sid.h>
+#include <sys/zfs_ctldir.h>
+#include <sys/zfs_fuid.h>
+#include <sys/zfs_quota.h>
+#include <sys/zfs_sa.h>
+#include <sys/zfs_vnops.h>
+#include <sys/zfs_rlock.h>
+#include <sys/cred.h>
+#include <sys/zpl.h>
+#include <sys/zil.h>
+#include <sys/sa_impl.h>
+
+/*
+ * Programming rules.
+ *
+ * Each vnode op performs some logical unit of work. To do this, the ZPL must
+ * properly lock its in-core state, create a DMU transaction, do the work,
+ * record this work in the intent log (ZIL), commit the DMU transaction,
+ * and wait for the intent log to commit if it is a synchronous operation.
+ * Moreover, the vnode ops must work in both normal and log replay context.
+ * The ordering of events is important to avoid deadlocks and references
+ * to freed memory. The example below illustrates the following Big Rules:
+ *
+ * (1) A check must be made in each zfs thread for a mounted file system.
+ * This is done avoiding races using ZFS_ENTER(zfsvfs).
+ * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
+ * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
+ * can return EIO from the calling function.
+ *
+ * (2) zrele() should always be the last thing except for zil_commit()
+ * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
+ * First, if it's the last reference, the vnode/znode
+ * can be freed, so the zp may point to freed memory. Second, the last
+ * reference will call zfs_zinactive(), which may induce a lot of work --
+ * pushing cached pages (which acquires range locks) and syncing out
+ * cached atime changes. Third, zfs_zinactive() may require a new tx,
+ * which could deadlock the system if you were already holding one.
+ * If you must call zrele() within a tx then use zfs_zrele_async().
+ *
+ * (3) All range locks must be grabbed before calling dmu_tx_assign(),
+ * as they can span dmu_tx_assign() calls.
+ *
+ * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to
+ * dmu_tx_assign(). This is critical because we don't want to block
+ * while holding locks.
+ *
+ * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This
+ * reduces lock contention and CPU usage when we must wait (note that if
+ * throughput is constrained by the storage, nearly every transaction
+ * must wait).
+ *
+ * Note, in particular, that if a lock is sometimes acquired before
+ * the tx assigns, and sometimes after (e.g. z_lock), then failing
+ * to use a non-blocking assign can deadlock the system. The scenario:
+ *
+ * Thread A has grabbed a lock before calling dmu_tx_assign().
+ * Thread B is in an already-assigned tx, and blocks for this lock.
+ * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
+ * forever, because the previous txg can't quiesce until B's tx commits.
+ *
+ * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
+ * then drop all locks, call dmu_tx_wait(), and try again. On subsequent
+ * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT,
+ * to indicate that this operation has already called dmu_tx_wait().
+ * This will ensure that we don't retry forever, waiting a short bit
+ * each time.
+ *
+ * (5) If the operation succeeded, generate the intent log entry for it
+ * before dropping locks. This ensures that the ordering of events
+ * in the intent log matches the order in which they actually occurred.
+ * During ZIL replay the zfs_log_* functions will update the sequence
+ * number to indicate the zil transaction has replayed.
+ *
+ * (6) At the end of each vnode op, the DMU tx must always commit,
+ * regardless of whether there were any errors.
+ *
+ * (7) After dropping all locks, invoke zil_commit(zilog, foid)
+ * to ensure that synchronous semantics are provided when necessary.
+ *
+ * In general, this is how things should be ordered in each vnode op:
+ *
+ * ZFS_ENTER(zfsvfs); // exit if unmounted
+ * top:
+ * zfs_dirent_lock(&dl, ...) // lock directory entry (may igrab())
+ * rw_enter(...); // grab any other locks you need
+ * tx = dmu_tx_create(...); // get DMU tx
+ * dmu_tx_hold_*(); // hold each object you might modify
+ * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ * if (error) {
+ * rw_exit(...); // drop locks
+ * zfs_dirent_unlock(dl); // unlock directory entry
+ * zrele(...); // release held znodes
+ * if (error == ERESTART) {
+ * waited = B_TRUE;
+ * dmu_tx_wait(tx);
+ * dmu_tx_abort(tx);
+ * goto top;
+ * }
+ * dmu_tx_abort(tx); // abort DMU tx
+ * ZFS_EXIT(zfsvfs); // finished in zfs
+ * return (error); // really out of space
+ * }
+ * error = do_real_work(); // do whatever this VOP does
+ * if (error == 0)
+ * zfs_log_*(...); // on success, make ZIL entry
+ * dmu_tx_commit(tx); // commit DMU tx -- error or not
+ * rw_exit(...); // drop locks
+ * zfs_dirent_unlock(dl); // unlock directory entry
+ * zrele(...); // release held znodes
+ * zil_commit(zilog, foid); // synchronous when necessary
+ * ZFS_EXIT(zfsvfs); // finished in zfs
+ * return (error); // done, report error
+ */
+
+/*
+ * Virus scanning is unsupported. It would be possible to add a hook
+ * here to performance the required virus scan. This could be done
+ * entirely in the kernel or potentially as an update to invoke a
+ * scanning utility.
+ */
+static int
+zfs_vscan(struct inode *ip, cred_t *cr, int async)
+{
+ return (0);
+}
+
+/* ARGSUSED */
+int
+zfs_open(struct inode *ip, int mode, int flag, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ /* Honor ZFS_APPENDONLY file attribute */
+ if ((mode & FMODE_WRITE) && (zp->z_pflags & ZFS_APPENDONLY) &&
+ ((flag & O_APPEND) == 0)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ /* Virus scan eligible files on open */
+ if (!zfs_has_ctldir(zp) && zfsvfs->z_vscan && S_ISREG(ip->i_mode) &&
+ !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) {
+ if (zfs_vscan(ip, cr, 0) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EACCES));
+ }
+ }
+
+ /* Keep a count of the synchronous opens in the znode */
+ if (flag & O_SYNC)
+ atomic_inc_32(&zp->z_sync_cnt);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/* ARGSUSED */
+int
+zfs_close(struct inode *ip, int flag, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ /* Decrement the synchronous opens in the znode */
+ if (flag & O_SYNC)
+ atomic_dec_32(&zp->z_sync_cnt);
+
+ if (!zfs_has_ctldir(zp) && zfsvfs->z_vscan && S_ISREG(ip->i_mode) &&
+ !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0)
+ VERIFY(zfs_vscan(ip, cr, 1) == 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+#if defined(SEEK_HOLE) && defined(SEEK_DATA)
+/*
+ * Lseek support for finding holes (cmd == SEEK_HOLE) and
+ * data (cmd == SEEK_DATA). "off" is an in/out parameter.
+ */
+static int
+zfs_holey_common(struct inode *ip, int cmd, loff_t *off)
+{
+ znode_t *zp = ITOZ(ip);
+ uint64_t noff = (uint64_t)*off; /* new offset */
+ uint64_t file_sz;
+ int error;
+ boolean_t hole;
+
+ file_sz = zp->z_size;
+ if (noff >= file_sz) {
+ return (SET_ERROR(ENXIO));
+ }
+
+ if (cmd == SEEK_HOLE)
+ hole = B_TRUE;
+ else
+ hole = B_FALSE;
+
+ error = dmu_offset_next(ZTOZSB(zp)->z_os, zp->z_id, hole, &noff);
+
+ if (error == ESRCH)
+ return (SET_ERROR(ENXIO));
+
+ /* file was dirty, so fall back to using generic logic */
+ if (error == EBUSY) {
+ if (hole)
+ *off = file_sz;
+
+ return (0);
+ }
+
+ /*
+ * We could find a hole that begins after the logical end-of-file,
+ * because dmu_offset_next() only works on whole blocks. If the
+ * EOF falls mid-block, then indicate that the "virtual hole"
+ * at the end of the file begins at the logical EOF, rather than
+ * at the end of the last block.
+ */
+ if (noff > file_sz) {
+ ASSERT(hole);
+ noff = file_sz;
+ }
+
+ if (noff < *off)
+ return (error);
+ *off = noff;
+ return (error);
+}
+
+int
+zfs_holey(struct inode *ip, int cmd, loff_t *off)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ error = zfs_holey_common(ip, cmd, off);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+#endif /* SEEK_HOLE && SEEK_DATA */
+
+#if defined(_KERNEL)
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages. What this means:
+ *
+ * On Write: If we find a memory mapped page, we write to *both*
+ * the page and the dmu buffer.
+ */
+void
+update_pages(znode_t *zp, int64_t start, int len,
+ objset_t *os, uint64_t oid)
+{
+ struct inode *ip = ZTOI(zp);
+ struct address_space *mp = ip->i_mapping;
+ struct page *pp;
+ uint64_t nbytes;
+ int64_t off;
+ void *pb;
+
+ off = start & (PAGE_SIZE-1);
+ for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
+ nbytes = MIN(PAGE_SIZE - off, len);
+
+ pp = find_lock_page(mp, start >> PAGE_SHIFT);
+ if (pp) {
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
+
+ pb = kmap(pp);
+ (void) dmu_read(os, oid, start+off, nbytes, pb+off,
+ DMU_READ_PREFETCH);
+ kunmap(pp);
+
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
+
+ mark_page_accessed(pp);
+ SetPageUptodate(pp);
+ ClearPageError(pp);
+ unlock_page(pp);
+ put_page(pp);
+ }
+
+ len -= nbytes;
+ off = 0;
+ }
+}
+
+/*
+ * When a file is memory mapped, we must keep the IO data synchronized
+ * between the DMU cache and the memory mapped pages. What this means:
+ *
+ * On Read: We "read" preferentially from memory mapped pages,
+ * else we default from the dmu buffer.
+ *
+ * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
+ * the file is memory mapped.
+ */
+int
+mappedread(znode_t *zp, int nbytes, uio_t *uio)
+{
+ struct inode *ip = ZTOI(zp);
+ struct address_space *mp = ip->i_mapping;
+ struct page *pp;
+ int64_t start, off;
+ uint64_t bytes;
+ int len = nbytes;
+ int error = 0;
+ void *pb;
+
+ start = uio->uio_loffset;
+ off = start & (PAGE_SIZE-1);
+ for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) {
+ bytes = MIN(PAGE_SIZE - off, len);
+
+ pp = find_lock_page(mp, start >> PAGE_SHIFT);
+ if (pp) {
+ ASSERT(PageUptodate(pp));
+ unlock_page(pp);
+
+ pb = kmap(pp);
+ error = uiomove(pb + off, bytes, UIO_READ, uio);
+ kunmap(pp);
+
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
+
+ mark_page_accessed(pp);
+ put_page(pp);
+ } else {
+ error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+ uio, bytes);
+ }
+
+ len -= bytes;
+ off = 0;
+ if (error)
+ break;
+ }
+ return (error);
+}
+#endif /* _KERNEL */
+
+unsigned long zfs_delete_blocks = DMU_MAX_DELETEBLKCNT;
+
+/*
+ * Write the bytes to a file.
+ *
+ * IN: zp - znode of file to be written to
+ * data - bytes to write
+ * len - number of bytes to write
+ * pos - offset to start writing at
+ *
+ * OUT: resid - remaining bytes to write
+ *
+ * RETURN: 0 if success
+ * positive error code if failure
+ *
+ * Timestamps:
+ * zp - ctime|mtime updated if byte count > 0
+ */
+int
+zfs_write_simple(znode_t *zp, const void *data, size_t len,
+ loff_t pos, size_t *resid)
+{
+ ssize_t written;
+ int error = 0;
+
+ written = zpl_write_common(ZTOI(zp), data, len, &pos,
+ UIO_SYSSPACE, 0, kcred);
+ if (written < 0) {
+ error = -written;
+ } else if (resid == NULL) {
+ if (written < len)
+ error = SET_ERROR(EIO); /* short write */
+ } else {
+ *resid = len - written;
+ }
+ return (error);
+}
+
+/*
+ * Drop a reference on the passed inode asynchronously. This ensures
+ * that the caller will never drop the last reference on an inode in
+ * the current context. Doing so while holding open a tx could result
+ * in a deadlock if iput_final() re-enters the filesystem code.
+ */
+void
+zfs_zrele_async(znode_t *zp)
+{
+ struct inode *ip = ZTOI(zp);
+ objset_t *os = ITOZSB(ip)->z_os;
+
+ ASSERT(atomic_read(&ip->i_count) > 0);
+ ASSERT(os != NULL);
+
+ if (atomic_read(&ip->i_count) == 1)
+ VERIFY(taskq_dispatch(dsl_pool_zrele_taskq(dmu_objset_pool(os)),
+ (task_func_t *)iput, ip, TQ_SLEEP) != TASKQID_INVALID);
+ else
+ zrele(zp);
+}
+
+/* ARGSUSED */
+static void
+zfs_get_done(zgd_t *zgd, int error)
+{
+ znode_t *zp = zgd->zgd_private;
+
+ if (zgd->zgd_db)
+ dmu_buf_rele(zgd->zgd_db, zgd);
+
+ zfs_rangelock_exit(zgd->zgd_lr);
+
+ /*
+ * Release the vnode asynchronously as we currently have the
+ * txg stopped from syncing.
+ */
+ zfs_zrele_async(zp);
+
+ kmem_free(zgd, sizeof (zgd_t));
+}
+
+#ifdef ZFS_DEBUG
+static int zil_fault_io = 0;
+#endif
+
+/*
+ * Get data to generate a TX_WRITE intent log record.
+ */
+int
+zfs_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb, zio_t *zio)
+{
+ zfsvfs_t *zfsvfs = arg;
+ objset_t *os = zfsvfs->z_os;
+ znode_t *zp;
+ uint64_t object = lr->lr_foid;
+ uint64_t offset = lr->lr_offset;
+ uint64_t size = lr->lr_length;
+ dmu_buf_t *db;
+ zgd_t *zgd;
+ int error = 0;
+
+ ASSERT3P(lwb, !=, NULL);
+ ASSERT3P(zio, !=, NULL);
+ ASSERT3U(size, !=, 0);
+
+ /*
+ * Nothing to do if the file has been removed
+ */
+ if (zfs_zget(zfsvfs, object, &zp) != 0)
+ return (SET_ERROR(ENOENT));
+ if (zp->z_unlinked) {
+ /*
+ * Release the vnode asynchronously as we currently have the
+ * txg stopped from syncing.
+ */
+ zfs_zrele_async(zp);
+ return (SET_ERROR(ENOENT));
+ }
+
+ zgd = kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
+ zgd->zgd_lwb = lwb;
+ zgd->zgd_private = zp;
+
+ /*
+ * Write records come in two flavors: immediate and indirect.
+ * For small writes it's cheaper to store the data with the
+ * log record (immediate); for large writes it's cheaper to
+ * sync the data and get a pointer to it (indirect) so that
+ * we don't have to write the data twice.
+ */
+ if (buf != NULL) { /* immediate write */
+ zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
+ offset, size, RL_READER);
+ /* test for truncation needs to be done while range locked */
+ if (offset >= zp->z_size) {
+ error = SET_ERROR(ENOENT);
+ } else {
+ error = dmu_read(os, object, offset, size, buf,
+ DMU_READ_NO_PREFETCH);
+ }
+ ASSERT(error == 0 || error == ENOENT);
+ } else { /* indirect write */
+ /*
+ * Have to lock the whole block to ensure when it's
+ * written out and its checksum is being calculated
+ * that no one can change the data. We need to re-check
+ * blocksize after we get the lock in case it's changed!
+ */
+ for (;;) {
+ uint64_t blkoff;
+ size = zp->z_blksz;
+ blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
+ offset -= blkoff;
+ zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
+ offset, size, RL_READER);
+ if (zp->z_blksz == size)
+ break;
+ offset += blkoff;
+ zfs_rangelock_exit(zgd->zgd_lr);
+ }
+ /* test for truncation needs to be done while range locked */
+ if (lr->lr_offset >= zp->z_size)
+ error = SET_ERROR(ENOENT);
+#ifdef ZFS_DEBUG
+ if (zil_fault_io) {
+ error = SET_ERROR(EIO);
+ zil_fault_io = 0;
+ }
+#endif
+ if (error == 0)
+ error = dmu_buf_hold(os, object, offset, zgd, &db,
+ DMU_READ_NO_PREFETCH);
+
+ if (error == 0) {
+ blkptr_t *bp = &lr->lr_blkptr;
+
+ zgd->zgd_db = db;
+ zgd->zgd_bp = bp;
+
+ ASSERT(db->db_offset == offset);
+ ASSERT(db->db_size == size);
+
+ error = dmu_sync(zio, lr->lr_common.lrc_txg,
+ zfs_get_done, zgd);
+ ASSERT(error || lr->lr_length <= size);
+
+ /*
+ * On success, we need to wait for the write I/O
+ * initiated by dmu_sync() to complete before we can
+ * release this dbuf. We will finish everything up
+ * in the zfs_get_done() callback.
+ */
+ if (error == 0)
+ return (0);
+
+ if (error == EALREADY) {
+ lr->lr_common.lrc_txtype = TX_WRITE2;
+ /*
+ * TX_WRITE2 relies on the data previously
+ * written by the TX_WRITE that caused
+ * EALREADY. We zero out the BP because
+ * it is the old, currently-on-disk BP.
+ */
+ zgd->zgd_bp = NULL;
+ BP_ZERO(bp);
+ error = 0;
+ }
+ }
+ }
+
+ zfs_get_done(zgd, error);
+
+ return (error);
+}
+
+/*ARGSUSED*/
+int
+zfs_access(struct inode *ip, int mode, int flag, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (flag & V_ACE_MASK)
+ error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
+ else
+ error = zfs_zaccess_rwx(zp, mode, flag, cr);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Lookup an entry in a directory, or an extended attribute directory.
+ * If it exists, return a held inode reference for it.
+ *
+ * IN: zdp - znode of directory to search.
+ * nm - name of entry to lookup.
+ * flags - LOOKUP_XATTR set if looking for an attribute.
+ * cr - credentials of caller.
+ * direntflags - directory lookup flags
+ * realpnp - returned pathname.
+ *
+ * OUT: zpp - znode of located entry, NULL if not found.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * NA
+ */
+/* ARGSUSED */
+int
+zfs_lookup(znode_t *zdp, char *nm, znode_t **zpp, int flags, cred_t *cr,
+ int *direntflags, pathname_t *realpnp)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zdp);
+ int error = 0;
+
+ /*
+ * Fast path lookup, however we must skip DNLC lookup
+ * for case folding or normalizing lookups because the
+ * DNLC code only stores the passed in name. This means
+ * creating 'a' and removing 'A' on a case insensitive
+ * file system would work, but DNLC still thinks 'a'
+ * exists and won't let you create it again on the next
+ * pass through fast path.
+ */
+ if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) {
+
+ if (!S_ISDIR(ZTOI(zdp)->i_mode)) {
+ return (SET_ERROR(ENOTDIR));
+ } else if (zdp->z_sa_hdl == NULL) {
+ return (SET_ERROR(EIO));
+ }
+
+ if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) {
+ error = zfs_fastaccesschk_execute(zdp, cr);
+ if (!error) {
+ *zpp = zdp;
+ zhold(*zpp);
+ return (0);
+ }
+ return (error);
+ }
+ }
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zdp);
+
+ *zpp = NULL;
+
+ if (flags & LOOKUP_XATTR) {
+ /*
+ * We don't allow recursive attributes..
+ * Maybe someday we will.
+ */
+ if (zdp->z_pflags & ZFS_XATTR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if ((error = zfs_get_xattrdir(zdp, zpp, cr, flags))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Do we have permission to get into attribute directory?
+ */
+
+ if ((error = zfs_zaccess(*zpp, ACE_EXECUTE, 0,
+ B_FALSE, cr))) {
+ zrele(*zpp);
+ *zpp = NULL;
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (!S_ISDIR(ZTOI(zdp)->i_mode)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENOTDIR));
+ }
+
+ /*
+ * Check accessibility of directory.
+ */
+
+ if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ error = zfs_dirlook(zdp, nm, zpp, flags, direntflags, realpnp);
+ if ((error == 0) && (*zpp))
+ zfs_inode_update(*zpp);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Attempt to create a new entry in a directory. If the entry
+ * already exists, truncate the file if permissible, else return
+ * an error. Return the ip of the created or trunc'd file.
+ *
+ * IN: dzp - znode of directory to put new file entry in.
+ * name - name of new file entry.
+ * vap - attributes of new file.
+ * excl - flag indicating exclusive or non-exclusive mode.
+ * mode - mode to open file with.
+ * cr - credentials of caller.
+ * flag - file flag.
+ * vsecp - ACL to be set
+ *
+ * OUT: zpp - znode of created or trunc'd entry.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dzp - ctime|mtime updated if new entry created
+ * zp - ctime|mtime always, atime if new
+ */
+
+/* ARGSUSED */
+int
+zfs_create(znode_t *dzp, char *name, vattr_t *vap, int excl,
+ int mode, znode_t **zpp, cred_t *cr, int flag, vsecattr_t *vsecp)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ zilog_t *zilog;
+ objset_t *os;
+ zfs_dirlock_t *dl;
+ dmu_tx_t *tx;
+ int error;
+ uid_t uid;
+ gid_t gid;
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+ boolean_t have_acl = B_FALSE;
+ boolean_t waited = B_FALSE;
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ gid = crgetgid(cr);
+ uid = crgetuid(cr);
+
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+ return (SET_ERROR(EINVAL));
+
+ if (name == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ os = zfsvfs->z_os;
+ zilog = zfsvfs->z_log;
+
+ if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ if (vap->va_mask & ATTR_XVATTR) {
+ if ((error = secpolicy_xvattr((xvattr_t *)vap,
+ crgetuid(cr), cr, vap->va_mode)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+top:
+ *zpp = NULL;
+ if (*name == '\0') {
+ /*
+ * Null component name refers to the directory itself.
+ */
+ zhold(dzp);
+ zp = dzp;
+ dl = NULL;
+ error = 0;
+ } else {
+ /* possible igrab(zp) */
+ int zflg = 0;
+
+ if (flag & FIGNORECASE)
+ zflg |= ZCILOOK;
+
+ error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+ NULL, NULL);
+ if (error) {
+ if (have_acl)
+ zfs_acl_ids_free(&acl_ids);
+ if (strcmp(name, "..") == 0)
+ error = SET_ERROR(EISDIR);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ if (zp == NULL) {
+ uint64_t txtype;
+ uint64_t projid = ZFS_DEFAULT_PROJID;
+
+ /*
+ * Create a new file object and update the directory
+ * to reference it.
+ */
+ if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ if (have_acl)
+ zfs_acl_ids_free(&acl_ids);
+ goto out;
+ }
+
+ /*
+ * We only support the creation of regular files in
+ * extended attribute directories.
+ */
+
+ if ((dzp->z_pflags & ZFS_XATTR) && !S_ISREG(vap->va_mode)) {
+ if (have_acl)
+ zfs_acl_ids_free(&acl_ids);
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+
+ if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
+ cr, vsecp, &acl_ids)) != 0)
+ goto out;
+ have_acl = B_TRUE;
+
+ if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
+ projid = zfs_inherit_projid(dzp);
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
+ zfs_acl_ids_free(&acl_ids);
+ error = SET_ERROR(EDQUOT);
+ goto out;
+ }
+
+ tx = dmu_tx_create(os);
+
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE);
+
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+ dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+ if (!zfsvfs->z_use_sa &&
+ acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, acl_ids.z_aclp->z_acl_bytes);
+ }
+
+ error = dmu_tx_assign(tx,
+ (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+ error = zfs_link_create(dl, zp, tx, ZNEW);
+ if (error != 0) {
+ /*
+ * Since, we failed to add the directory entry for it,
+ * delete the newly created dnode.
+ */
+ zfs_znode_delete(zp, tx);
+ remove_inode_hash(ZTOI(zp));
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_commit(tx);
+ goto out;
+ }
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
+ if (flag & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_create(zilog, tx, txtype, dzp, zp, name,
+ vsecp, acl_ids.z_fuidp, vap);
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_commit(tx);
+ } else {
+ int aflags = (flag & O_APPEND) ? V_APPEND : 0;
+
+ if (have_acl)
+ zfs_acl_ids_free(&acl_ids);
+ have_acl = B_FALSE;
+
+ /*
+ * A directory entry already exists for this name.
+ */
+ /*
+ * Can't truncate an existing file if in exclusive mode.
+ */
+ if (excl) {
+ error = SET_ERROR(EEXIST);
+ goto out;
+ }
+ /*
+ * Can't open a directory for writing.
+ */
+ if (S_ISDIR(ZTOI(zp)->i_mode)) {
+ error = SET_ERROR(EISDIR);
+ goto out;
+ }
+ /*
+ * Verify requested access to file.
+ */
+ if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) {
+ goto out;
+ }
+
+ mutex_enter(&dzp->z_lock);
+ dzp->z_seq++;
+ mutex_exit(&dzp->z_lock);
+
+ /*
+ * Truncate regular files if requested.
+ */
+ if (S_ISREG(ZTOI(zp)->i_mode) &&
+ (vap->va_mask & ATTR_SIZE) && (vap->va_size == 0)) {
+ /* we can't hold any locks when calling zfs_freesp() */
+ if (dl) {
+ zfs_dirent_unlock(dl);
+ dl = NULL;
+ }
+ error = zfs_freesp(zp, 0, 0, mode, TRUE);
+ }
+ }
+out:
+
+ if (dl)
+ zfs_dirent_unlock(dl);
+
+ if (error) {
+ if (zp)
+ zrele(zp);
+ } else {
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+ *zpp = zp;
+ }
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/* ARGSUSED */
+int
+zfs_tmpfile(struct inode *dip, vattr_t *vap, int excl,
+ int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp)
+{
+ znode_t *zp = NULL, *dzp = ITOZ(dip);
+ zfsvfs_t *zfsvfs = ITOZSB(dip);
+ objset_t *os;
+ dmu_tx_t *tx;
+ int error;
+ uid_t uid;
+ gid_t gid;
+ zfs_acl_ids_t acl_ids;
+ uint64_t projid = ZFS_DEFAULT_PROJID;
+ boolean_t fuid_dirtied;
+ boolean_t have_acl = B_FALSE;
+ boolean_t waited = B_FALSE;
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ gid = crgetgid(cr);
+ uid = crgetuid(cr);
+
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ os = zfsvfs->z_os;
+
+ if (vap->va_mask & ATTR_XVATTR) {
+ if ((error = secpolicy_xvattr((xvattr_t *)vap,
+ crgetuid(cr), cr, vap->va_mode)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+top:
+ *ipp = NULL;
+
+ /*
+ * Create a new file object and update the directory
+ * to reference it.
+ */
+ if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ if (have_acl)
+ zfs_acl_ids_free(&acl_ids);
+ goto out;
+ }
+
+ if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
+ cr, vsecp, &acl_ids)) != 0)
+ goto out;
+ have_acl = B_TRUE;
+
+ if (S_ISREG(vap->va_mode) || S_ISDIR(vap->va_mode))
+ projid = zfs_inherit_projid(dzp);
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) {
+ zfs_acl_ids_free(&acl_ids);
+ error = SET_ERROR(EDQUOT);
+ goto out;
+ }
+
+ tx = dmu_tx_create(os);
+
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE);
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ if (!zfsvfs->z_use_sa &&
+ acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, acl_ids.z_aclp->z_acl_bytes);
+ }
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ zfs_mknode(dzp, vap, tx, cr, IS_TMPFILE, &zp, &acl_ids);
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ /* Add to unlinked set */
+ zp->z_unlinked = B_TRUE;
+ zfs_unlinked_add(zp, tx);
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_commit(tx);
+out:
+
+ if (error) {
+ if (zp)
+ zrele(zp);
+ } else {
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+ *ipp = ZTOI(zp);
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Remove an entry from a directory.
+ *
+ * IN: dzp - znode of directory to remove entry from.
+ * name - name of entry to remove.
+ * cr - credentials of caller.
+ * flags - case flags.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * dzp - ctime|mtime
+ * ip - ctime (if nlink > 0)
+ */
+
+uint64_t null_xattr = 0;
+
+/*ARGSUSED*/
+int
+zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags)
+{
+ znode_t *zp;
+ znode_t *xzp;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ zilog_t *zilog;
+ uint64_t acl_obj, xattr_obj;
+ uint64_t xattr_obj_unlinked = 0;
+ uint64_t obj = 0;
+ uint64_t links;
+ zfs_dirlock_t *dl;
+ dmu_tx_t *tx;
+ boolean_t may_delete_now, delete_now = FALSE;
+ boolean_t unlinked, toobig = FALSE;
+ uint64_t txtype;
+ pathname_t *realnmp = NULL;
+ pathname_t realnm;
+ int error;
+ int zflg = ZEXISTS;
+ boolean_t waited = B_FALSE;
+
+ if (name == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (flags & FIGNORECASE) {
+ zflg |= ZCILOOK;
+ pn_alloc(&realnm);
+ realnmp = &realnm;
+ }
+
+top:
+ xattr_obj = 0;
+ xzp = NULL;
+ /*
+ * Attempt to lock directory; fail if entry doesn't exist.
+ */
+ if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+ NULL, realnmp))) {
+ if (realnmp)
+ pn_free(realnmp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
+ goto out;
+ }
+
+ /*
+ * Need to use rmdir for removing directories.
+ */
+ if (S_ISDIR(ZTOI(zp)->i_mode)) {
+ error = SET_ERROR(EPERM);
+ goto out;
+ }
+
+ mutex_enter(&zp->z_lock);
+ may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 &&
+ !(zp->z_is_mapped);
+ mutex_exit(&zp->z_lock);
+
+ /*
+ * We may delete the znode now, or we may put it in the unlinked set;
+ * it depends on whether we're the last link, and on whether there are
+ * other holds on the inode. So we dmu_tx_hold() the right things to
+ * allow for either case.
+ */
+ obj = zp->z_id;
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ zfs_sa_upgrade_txholds(tx, dzp);
+ if (may_delete_now) {
+ toobig = zp->z_size > zp->z_blksz * zfs_delete_blocks;
+ /* if the file is too big, only hold_free a token amount */
+ dmu_tx_hold_free(tx, zp->z_id, 0,
+ (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END));
+ }
+
+ /* are there any extended attributes? */
+ error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+ &xattr_obj, sizeof (xattr_obj));
+ if (error == 0 && xattr_obj) {
+ error = zfs_zget(zfsvfs, xattr_obj, &xzp);
+ ASSERT0(error);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
+ }
+
+ mutex_enter(&zp->z_lock);
+ if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now)
+ dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);
+ mutex_exit(&zp->z_lock);
+
+ /* charge as an update -- would be nice not to charge at all */
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+
+ /*
+ * Mark this transaction as typically resulting in a net free of space
+ */
+ dmu_tx_mark_netfree(tx);
+
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ zrele(zp);
+ if (xzp)
+ zrele(xzp);
+ goto top;
+ }
+ if (realnmp)
+ pn_free(realnmp);
+ dmu_tx_abort(tx);
+ zrele(zp);
+ if (xzp)
+ zrele(xzp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Remove the directory entry.
+ */
+ error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked);
+
+ if (error) {
+ dmu_tx_commit(tx);
+ goto out;
+ }
+
+ if (unlinked) {
+ /*
+ * Hold z_lock so that we can make sure that the ACL obj
+ * hasn't changed. Could have been deleted due to
+ * zfs_sa_upgrade().
+ */
+ mutex_enter(&zp->z_lock);
+ (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+ &xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
+ delete_now = may_delete_now && !toobig &&
+ atomic_read(&ZTOI(zp)->i_count) == 1 &&
+ !(zp->z_is_mapped) && xattr_obj == xattr_obj_unlinked &&
+ zfs_external_acl(zp) == acl_obj;
+ }
+
+ if (delete_now) {
+ if (xattr_obj_unlinked) {
+ ASSERT3U(ZTOI(xzp)->i_nlink, ==, 2);
+ mutex_enter(&xzp->z_lock);
+ xzp->z_unlinked = B_TRUE;
+ clear_nlink(ZTOI(xzp));
+ links = 0;
+ error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs),
+ &links, sizeof (links), tx);
+ ASSERT3U(error, ==, 0);
+ mutex_exit(&xzp->z_lock);
+ zfs_unlinked_add(xzp, tx);
+
+ if (zp->z_is_sa)
+ error = sa_remove(zp->z_sa_hdl,
+ SA_ZPL_XATTR(zfsvfs), tx);
+ else
+ error = sa_update(zp->z_sa_hdl,
+ SA_ZPL_XATTR(zfsvfs), &null_xattr,
+ sizeof (uint64_t), tx);
+ ASSERT0(error);
+ }
+ /*
+ * Add to the unlinked set because a new reference could be
+ * taken concurrently resulting in a deferred destruction.
+ */
+ zfs_unlinked_add(zp, tx);
+ mutex_exit(&zp->z_lock);
+ } else if (unlinked) {
+ mutex_exit(&zp->z_lock);
+ zfs_unlinked_add(zp, tx);
+ }
+
+ txtype = TX_REMOVE;
+ if (flags & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked);
+
+ dmu_tx_commit(tx);
+out:
+ if (realnmp)
+ pn_free(realnmp);
+
+ zfs_dirent_unlock(dl);
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+
+ if (delete_now)
+ zrele(zp);
+ else
+ zfs_zrele_async(zp);
+
+ if (xzp) {
+ zfs_inode_update(xzp);
+ zfs_zrele_async(xzp);
+ }
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Create a new directory and insert it into dzp using the name
+ * provided. Return a pointer to the inserted directory.
+ *
+ * IN: dzp - znode of directory to add subdir to.
+ * dirname - name of new directory.
+ * vap - attributes of new directory.
+ * cr - credentials of caller.
+ * flags - case flags.
+ * vsecp - ACL to be set
+ *
+ * OUT: zpp - znode of created directory.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * dzp - ctime|mtime updated
+ * zpp - ctime|mtime|atime updated
+ */
+/*ARGSUSED*/
+int
+zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap, znode_t **zpp,
+ cred_t *cr, int flags, vsecattr_t *vsecp)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ zilog_t *zilog;
+ zfs_dirlock_t *dl;
+ uint64_t txtype;
+ dmu_tx_t *tx;
+ int error;
+ int zf = ZNEW;
+ uid_t uid;
+ gid_t gid = crgetgid(cr);
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+ boolean_t waited = B_FALSE;
+
+ ASSERT(S_ISDIR(vap->va_mode));
+
+ /*
+ * If we have an ephemeral id, ACL, or XVATTR then
+ * make sure file system is at proper version
+ */
+
+ uid = crgetuid(cr);
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
+ return (SET_ERROR(EINVAL));
+
+ if (dirname == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (dzp->z_pflags & ZFS_XATTR) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(dirname,
+ strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+ if (flags & FIGNORECASE)
+ zf |= ZCILOOK;
+
+ if (vap->va_mask & ATTR_XVATTR) {
+ if ((error = secpolicy_xvattr((xvattr_t *)vap,
+ crgetuid(cr), cr, vap->va_mode)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ }
+
+ if ((error = zfs_acl_ids_create(dzp, 0, vap, cr,
+ vsecp, &acl_ids)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ /*
+ * First make sure the new directory doesn't exist.
+ *
+ * Existence is checked first to make sure we don't return
+ * EACCES instead of EEXIST which can cause some applications
+ * to fail.
+ */
+top:
+ *zpp = NULL;
+
+ if ((error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf,
+ NULL, NULL))) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if ((error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr))) {
+ zfs_acl_ids_free(&acl_ids);
+ zfs_dirent_unlock(dl);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) {
+ zfs_acl_ids_free(&acl_ids);
+ zfs_dirent_unlock(dl);
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EDQUOT));
+ }
+
+ /*
+ * Add a new entry to the directory.
+ */
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
+ dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+ acl_ids.z_aclp->z_acl_bytes);
+ }
+
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE);
+
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Create new node.
+ */
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+ /*
+ * Now put new name in parent dir.
+ */
+ error = zfs_link_create(dl, zp, tx, ZNEW);
+ if (error != 0) {
+ zfs_znode_delete(zp, tx);
+ remove_inode_hash(ZTOI(zp));
+ goto out;
+ }
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ *zpp = zp;
+
+ txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap);
+ if (flags & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp,
+ acl_ids.z_fuidp, vap);
+
+out:
+ zfs_acl_ids_free(&acl_ids);
+
+ dmu_tx_commit(tx);
+
+ zfs_dirent_unlock(dl);
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ if (error != 0) {
+ zrele(zp);
+ } else {
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+ }
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Remove a directory subdir entry. If the current working
+ * directory is the same as the subdir to be removed, the
+ * remove will fail.
+ *
+ * IN: dzp - znode of directory to remove from.
+ * name - name of directory to be removed.
+ * cwd - inode of current working directory.
+ * cr - credentials of caller.
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dzp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+int
+zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd, cred_t *cr,
+ int flags)
+{
+ znode_t *zp;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ zilog_t *zilog;
+ zfs_dirlock_t *dl;
+ dmu_tx_t *tx;
+ int error;
+ int zflg = ZEXISTS;
+ boolean_t waited = B_FALSE;
+
+ if (name == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (flags & FIGNORECASE)
+ zflg |= ZCILOOK;
+top:
+ zp = NULL;
+
+ /*
+ * Attempt to lock directory; fail if entry doesn't exist.
+ */
+ if ((error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
+ NULL, NULL))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
+ goto out;
+ }
+
+ if (!S_ISDIR(ZTOI(zp)->i_mode)) {
+ error = SET_ERROR(ENOTDIR);
+ goto out;
+ }
+
+ if (zp == cwd) {
+ error = SET_ERROR(EINVAL);
+ goto out;
+ }
+
+ /*
+ * Grab a lock on the directory to make sure that no one is
+ * trying to add (or lookup) entries while we are removing it.
+ */
+ rw_enter(&zp->z_name_lock, RW_WRITER);
+
+ /*
+ * Grab a lock on the parent pointer to make sure we play well
+ * with the treewalk and directory rename code.
+ */
+ rw_enter(&zp->z_parent_lock, RW_WRITER);
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+ zfs_sa_upgrade_txholds(tx, zp);
+ zfs_sa_upgrade_txholds(tx, dzp);
+ dmu_tx_mark_netfree(tx);
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ rw_exit(&zp->z_parent_lock);
+ rw_exit(&zp->z_name_lock);
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ zrele(zp);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ zrele(zp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ error = zfs_link_destroy(dl, zp, tx, zflg, NULL);
+
+ if (error == 0) {
+ uint64_t txtype = TX_RMDIR;
+ if (flags & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT,
+ B_FALSE);
+ }
+
+ dmu_tx_commit(tx);
+
+ rw_exit(&zp->z_parent_lock);
+ rw_exit(&zp->z_name_lock);
+out:
+ zfs_dirent_unlock(dl);
+
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+ zrele(zp);
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Read directory entries from the given directory cursor position and emit
+ * name and position for each entry.
+ *
+ * IN: ip - inode of directory to read.
+ * ctx - directory entry context.
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * ip - atime updated
+ *
+ * Note that the low 4 bits of the cookie returned by zap is always zero.
+ * This allows us to use the low range for "special" directory entries:
+ * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
+ * we use the offset 2 for the '.zfs' directory.
+ */
+/* ARGSUSED */
+int
+zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ objset_t *os;
+ zap_cursor_t zc;
+ zap_attribute_t zap;
+ int error;
+ uint8_t prefetch;
+ uint8_t type;
+ int done = 0;
+ uint64_t parent;
+ uint64_t offset; /* must be unsigned; checks for < 1 */
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+ &parent, sizeof (parent))) != 0)
+ goto out;
+
+ /*
+ * Quit if directory has been removed (posix)
+ */
+ if (zp->z_unlinked)
+ goto out;
+
+ error = 0;
+ os = zfsvfs->z_os;
+ offset = ctx->pos;
+ prefetch = zp->z_zn_prefetch;
+
+ /*
+ * Initialize the iterator cursor.
+ */
+ if (offset <= 3) {
+ /*
+ * Start iteration from the beginning of the directory.
+ */
+ zap_cursor_init(&zc, os, zp->z_id);
+ } else {
+ /*
+ * The offset is a serialized cursor.
+ */
+ zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
+ }
+
+ /*
+ * Transform to file-system independent format
+ */
+ while (!done) {
+ uint64_t objnum;
+ /*
+ * Special case `.', `..', and `.zfs'.
+ */
+ if (offset == 0) {
+ (void) strcpy(zap.za_name, ".");
+ zap.za_normalization_conflict = 0;
+ objnum = zp->z_id;
+ type = DT_DIR;
+ } else if (offset == 1) {
+ (void) strcpy(zap.za_name, "..");
+ zap.za_normalization_conflict = 0;
+ objnum = parent;
+ type = DT_DIR;
+ } else if (offset == 2 && zfs_show_ctldir(zp)) {
+ (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
+ zap.za_normalization_conflict = 0;
+ objnum = ZFSCTL_INO_ROOT;
+ type = DT_DIR;
+ } else {
+ /*
+ * Grab next entry.
+ */
+ if ((error = zap_cursor_retrieve(&zc, &zap))) {
+ if (error == ENOENT)
+ break;
+ else
+ goto update;
+ }
+
+ /*
+ * Allow multiple entries provided the first entry is
+ * the object id. Non-zpl consumers may safely make
+ * use of the additional space.
+ *
+ * XXX: This should be a feature flag for compatibility
+ */
+ if (zap.za_integer_length != 8 ||
+ zap.za_num_integers == 0) {
+ cmn_err(CE_WARN, "zap_readdir: bad directory "
+ "entry, obj = %lld, offset = %lld, "
+ "length = %d, num = %lld\n",
+ (u_longlong_t)zp->z_id,
+ (u_longlong_t)offset,
+ zap.za_integer_length,
+ (u_longlong_t)zap.za_num_integers);
+ error = SET_ERROR(ENXIO);
+ goto update;
+ }
+
+ objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
+ type = ZFS_DIRENT_TYPE(zap.za_first_integer);
+ }
+
+ done = !zpl_dir_emit(ctx, zap.za_name, strlen(zap.za_name),
+ objnum, type);
+ if (done)
+ break;
+
+ /* Prefetch znode */
+ if (prefetch) {
+ dmu_prefetch(os, objnum, 0, 0, 0,
+ ZIO_PRIORITY_SYNC_READ);
+ }
+
+ /*
+ * Move to the next entry, fill in the previous offset.
+ */
+ if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
+ zap_cursor_advance(&zc);
+ offset = zap_cursor_serialize(&zc);
+ } else {
+ offset += 1;
+ }
+ ctx->pos = offset;
+ }
+ zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
+
+update:
+ zap_cursor_fini(&zc);
+ if (error == ENOENT)
+ error = 0;
+out:
+ ZFS_EXIT(zfsvfs);
+
+ return (error);
+}
+
+/*
+ * Get the basic file attributes and place them in the provided kstat
+ * structure. The inode is assumed to be the authoritative source
+ * for most of the attributes. However, the znode currently has the
+ * authoritative atime, blksize, and block count.
+ *
+ * IN: ip - inode of file.
+ *
+ * OUT: sp - kstat values.
+ *
+ * RETURN: 0 (always succeeds)
+ */
+/* ARGSUSED */
+int
+zfs_getattr_fast(struct inode *ip, struct kstat *sp)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ uint32_t blksize;
+ u_longlong_t nblocks;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ mutex_enter(&zp->z_lock);
+
+ generic_fillattr(ip, sp);
+ /*
+ * +1 link count for root inode with visible '.zfs' directory.
+ */
+ if ((zp->z_id == zfsvfs->z_root) && zfs_show_ctldir(zp))
+ if (sp->nlink < ZFS_LINK_MAX)
+ sp->nlink++;
+
+ sa_object_size(zp->z_sa_hdl, &blksize, &nblocks);
+ sp->blksize = blksize;
+ sp->blocks = nblocks;
+
+ if (unlikely(zp->z_blksz == 0)) {
+ /*
+ * Block size hasn't been set; suggest maximal I/O transfers.
+ */
+ sp->blksize = zfsvfs->z_max_blksz;
+ }
+
+ mutex_exit(&zp->z_lock);
+
+ /*
+ * Required to prevent NFS client from detecting different inode
+ * numbers of snapshot root dentry before and after snapshot mount.
+ */
+ if (zfsvfs->z_issnap) {
+ if (ip->i_sb->s_root->d_inode == ip)
+ sp->ino = ZFSCTL_INO_SNAPDIRS -
+ dmu_objset_id(zfsvfs->z_os);
+ }
+
+ ZFS_EXIT(zfsvfs);
+
+ return (0);
+}
+
+/*
+ * For the operation of changing file's user/group/project, we need to
+ * handle not only the main object that is assigned to the file directly,
+ * but also the ones that are used by the file via hidden xattr directory.
+ *
+ * Because the xattr directory may contains many EA entries, as to it may
+ * be impossible to change all of them via the transaction of changing the
+ * main object's user/group/project attributes. Then we have to change them
+ * via other multiple independent transactions one by one. It may be not good
+ * solution, but we have no better idea yet.
+ */
+static int
+zfs_setattr_dir(znode_t *dzp)
+{
+ struct inode *dxip = ZTOI(dzp);
+ struct inode *xip = NULL;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ objset_t *os = zfsvfs->z_os;
+ zap_cursor_t zc;
+ zap_attribute_t zap;
+ zfs_dirlock_t *dl;
+ znode_t *zp = NULL;
+ dmu_tx_t *tx = NULL;
+ uint64_t uid, gid;
+ sa_bulk_attr_t bulk[4];
+ int count;
+ int err;
+
+ zap_cursor_init(&zc, os, dzp->z_id);
+ while ((err = zap_cursor_retrieve(&zc, &zap)) == 0) {
+ count = 0;
+ if (zap.za_integer_length != 8 || zap.za_num_integers != 1) {
+ err = ENXIO;
+ break;
+ }
+
+ err = zfs_dirent_lock(&dl, dzp, (char *)zap.za_name, &zp,
+ ZEXISTS, NULL, NULL);
+ if (err == ENOENT)
+ goto next;
+ if (err)
+ break;
+
+ xip = ZTOI(zp);
+ if (KUID_TO_SUID(xip->i_uid) == KUID_TO_SUID(dxip->i_uid) &&
+ KGID_TO_SGID(xip->i_gid) == KGID_TO_SGID(dxip->i_gid) &&
+ zp->z_projid == dzp->z_projid)
+ goto next;
+
+ tx = dmu_tx_create(os);
+ if (!(zp->z_pflags & ZFS_PROJID))
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ else
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err)
+ break;
+
+ mutex_enter(&dzp->z_lock);
+
+ if (KUID_TO_SUID(xip->i_uid) != KUID_TO_SUID(dxip->i_uid)) {
+ xip->i_uid = dxip->i_uid;
+ uid = zfs_uid_read(dxip);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+ &uid, sizeof (uid));
+ }
+
+ if (KGID_TO_SGID(xip->i_gid) != KGID_TO_SGID(dxip->i_gid)) {
+ xip->i_gid = dxip->i_gid;
+ gid = zfs_gid_read(dxip);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
+ &gid, sizeof (gid));
+ }
+
+ if (zp->z_projid != dzp->z_projid) {
+ if (!(zp->z_pflags & ZFS_PROJID)) {
+ zp->z_pflags |= ZFS_PROJID;
+ SA_ADD_BULK_ATTR(bulk, count,
+ SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags,
+ sizeof (zp->z_pflags));
+ }
+
+ zp->z_projid = dzp->z_projid;
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PROJID(zfsvfs),
+ NULL, &zp->z_projid, sizeof (zp->z_projid));
+ }
+
+ mutex_exit(&dzp->z_lock);
+
+ if (likely(count > 0)) {
+ err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ dmu_tx_commit(tx);
+ } else {
+ dmu_tx_abort(tx);
+ }
+ tx = NULL;
+ if (err != 0 && err != ENOENT)
+ break;
+
+next:
+ if (zp) {
+ zrele(zp);
+ zp = NULL;
+ zfs_dirent_unlock(dl);
+ }
+ zap_cursor_advance(&zc);
+ }
+
+ if (tx)
+ dmu_tx_abort(tx);
+ if (zp) {
+ zrele(zp);
+ zfs_dirent_unlock(dl);
+ }
+ zap_cursor_fini(&zc);
+
+ return (err == ENOENT ? 0 : err);
+}
+
+/*
+ * Set the file attributes to the values contained in the
+ * vattr structure.
+ *
+ * IN: zp - znode of file to be modified.
+ * vap - new attribute values.
+ * If ATTR_XVATTR set, then optional attrs are being set
+ * flags - ATTR_UTIME set if non-default time values provided.
+ * - ATTR_NOACLCHECK (CIFS context only).
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * ip - ctime updated, mtime updated if size changed.
+ */
+/* ARGSUSED */
+int
+zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr)
+{
+ struct inode *ip;
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ objset_t *os = zfsvfs->z_os;
+ zilog_t *zilog;
+ dmu_tx_t *tx;
+ vattr_t oldva;
+ xvattr_t *tmpxvattr;
+ uint_t mask = vap->va_mask;
+ uint_t saved_mask = 0;
+ int trim_mask = 0;
+ uint64_t new_mode;
+ uint64_t new_kuid = 0, new_kgid = 0, new_uid, new_gid;
+ uint64_t xattr_obj;
+ uint64_t mtime[2], ctime[2], atime[2];
+ uint64_t projid = ZFS_INVALID_PROJID;
+ znode_t *attrzp;
+ int need_policy = FALSE;
+ int err, err2 = 0;
+ zfs_fuid_info_t *fuidp = NULL;
+ xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
+ xoptattr_t *xoap;
+ zfs_acl_t *aclp;
+ boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+ boolean_t fuid_dirtied = B_FALSE;
+ boolean_t handle_eadir = B_FALSE;
+ sa_bulk_attr_t *bulk, *xattr_bulk;
+ int count = 0, xattr_count = 0, bulks = 8;
+
+ if (mask == 0)
+ return (0);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ ip = ZTOI(zp);
+
+ /*
+ * If this is a xvattr_t, then get a pointer to the structure of
+ * optional attributes. If this is NULL, then we have a vattr_t.
+ */
+ xoap = xva_getxoptattr(xvap);
+ if (xoap != NULL && (mask & ATTR_XVATTR)) {
+ if (XVA_ISSET_REQ(xvap, XAT_PROJID)) {
+ if (!dmu_objset_projectquota_enabled(os) ||
+ (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENOTSUP));
+ }
+
+ projid = xoap->xoa_projid;
+ if (unlikely(projid == ZFS_INVALID_PROJID)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID)
+ projid = ZFS_INVALID_PROJID;
+ else
+ need_policy = TRUE;
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) &&
+ (xoap->xoa_projinherit !=
+ ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) &&
+ (!dmu_objset_projectquota_enabled(os) ||
+ (!S_ISREG(ip->i_mode) && !S_ISDIR(ip->i_mode)))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENOTSUP));
+ }
+ }
+
+ zilog = zfsvfs->z_log;
+
+ /*
+ * Make sure that if we have ephemeral uid/gid or xvattr specified
+ * that file system is at proper version level
+ */
+
+ if (zfsvfs->z_use_fuids == B_FALSE &&
+ (((mask & ATTR_UID) && IS_EPHEMERAL(vap->va_uid)) ||
+ ((mask & ATTR_GID) && IS_EPHEMERAL(vap->va_gid)) ||
+ (mask & ATTR_XVATTR))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ if (mask & ATTR_SIZE && S_ISDIR(ip->i_mode)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EISDIR));
+ }
+
+ if (mask & ATTR_SIZE && !S_ISREG(ip->i_mode) && !S_ISFIFO(ip->i_mode)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ tmpxvattr = kmem_alloc(sizeof (xvattr_t), KM_SLEEP);
+ xva_init(tmpxvattr);
+
+ bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP);
+ xattr_bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * bulks, KM_SLEEP);
+
+ /*
+ * Immutable files can only alter immutable bit and atime
+ */
+ if ((zp->z_pflags & ZFS_IMMUTABLE) &&
+ ((mask & (ATTR_SIZE|ATTR_UID|ATTR_GID|ATTR_MTIME|ATTR_MODE)) ||
+ ((mask & ATTR_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
+ err = SET_ERROR(EPERM);
+ goto out3;
+ }
+
+ if ((mask & ATTR_SIZE) && (zp->z_pflags & ZFS_READONLY)) {
+ err = SET_ERROR(EPERM);
+ goto out3;
+ }
+
+ /*
+ * Verify timestamps doesn't overflow 32 bits.
+ * ZFS can handle large timestamps, but 32bit syscalls can't
+ * handle times greater than 2039. This check should be removed
+ * once large timestamps are fully supported.
+ */
+ if (mask & (ATTR_ATIME | ATTR_MTIME)) {
+ if (((mask & ATTR_ATIME) &&
+ TIMESPEC_OVERFLOW(&vap->va_atime)) ||
+ ((mask & ATTR_MTIME) &&
+ TIMESPEC_OVERFLOW(&vap->va_mtime))) {
+ err = SET_ERROR(EOVERFLOW);
+ goto out3;
+ }
+ }
+
+top:
+ attrzp = NULL;
+ aclp = NULL;
+
+ /* Can this be moved to before the top label? */
+ if (zfs_is_readonly(zfsvfs)) {
+ err = SET_ERROR(EROFS);
+ goto out3;
+ }
+
+ /*
+ * First validate permissions
+ */
+
+ if (mask & ATTR_SIZE) {
+ err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr);
+ if (err)
+ goto out3;
+
+ /*
+ * XXX - Note, we are not providing any open
+ * mode flags here (like FNDELAY), so we may
+ * block if there are locks present... this
+ * should be addressed in openat().
+ */
+ /* XXX - would it be OK to generate a log record here? */
+ err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
+ if (err)
+ goto out3;
+ }
+
+ if (mask & (ATTR_ATIME|ATTR_MTIME) ||
+ ((mask & ATTR_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
+ XVA_ISSET_REQ(xvap, XAT_READONLY) ||
+ XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
+ XVA_ISSET_REQ(xvap, XAT_OFFLINE) ||
+ XVA_ISSET_REQ(xvap, XAT_SPARSE) ||
+ XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
+ XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) {
+ need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
+ skipaclchk, cr);
+ }
+
+ if (mask & (ATTR_UID|ATTR_GID)) {
+ int idmask = (mask & (ATTR_UID|ATTR_GID));
+ int take_owner;
+ int take_group;
+
+ /*
+ * NOTE: even if a new mode is being set,
+ * we may clear S_ISUID/S_ISGID bits.
+ */
+
+ if (!(mask & ATTR_MODE))
+ vap->va_mode = zp->z_mode;
+
+ /*
+ * Take ownership or chgrp to group we are a member of
+ */
+
+ take_owner = (mask & ATTR_UID) && (vap->va_uid == crgetuid(cr));
+ take_group = (mask & ATTR_GID) &&
+ zfs_groupmember(zfsvfs, vap->va_gid, cr);
+
+ /*
+ * If both ATTR_UID and ATTR_GID are set then take_owner and
+ * take_group must both be set in order to allow taking
+ * ownership.
+ *
+ * Otherwise, send the check through secpolicy_vnode_setattr()
+ *
+ */
+
+ if (((idmask == (ATTR_UID|ATTR_GID)) &&
+ take_owner && take_group) ||
+ ((idmask == ATTR_UID) && take_owner) ||
+ ((idmask == ATTR_GID) && take_group)) {
+ if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
+ skipaclchk, cr) == 0) {
+ /*
+ * Remove setuid/setgid for non-privileged users
+ */
+ (void) secpolicy_setid_clear(vap, cr);
+ trim_mask = (mask & (ATTR_UID|ATTR_GID));
+ } else {
+ need_policy = TRUE;
+ }
+ } else {
+ need_policy = TRUE;
+ }
+ }
+
+ mutex_enter(&zp->z_lock);
+ oldva.va_mode = zp->z_mode;
+ zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
+ if (mask & ATTR_XVATTR) {
+ /*
+ * Update xvattr mask to include only those attributes
+ * that are actually changing.
+ *
+ * the bits will be restored prior to actually setting
+ * the attributes so the caller thinks they were set.
+ */
+ if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
+ if (xoap->xoa_appendonly !=
+ ((zp->z_pflags & ZFS_APPENDONLY) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_APPENDONLY);
+ XVA_SET_REQ(tmpxvattr, XAT_APPENDONLY);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) {
+ if (xoap->xoa_projinherit !=
+ ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_PROJINHERIT);
+ XVA_SET_REQ(tmpxvattr, XAT_PROJINHERIT);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
+ if (xoap->xoa_nounlink !=
+ ((zp->z_pflags & ZFS_NOUNLINK) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_NOUNLINK);
+ XVA_SET_REQ(tmpxvattr, XAT_NOUNLINK);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
+ if (xoap->xoa_immutable !=
+ ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
+ XVA_SET_REQ(tmpxvattr, XAT_IMMUTABLE);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
+ if (xoap->xoa_nodump !=
+ ((zp->z_pflags & ZFS_NODUMP) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_NODUMP);
+ XVA_SET_REQ(tmpxvattr, XAT_NODUMP);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
+ if (xoap->xoa_av_modified !=
+ ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
+ XVA_SET_REQ(tmpxvattr, XAT_AV_MODIFIED);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
+ if ((!S_ISREG(ip->i_mode) &&
+ xoap->xoa_av_quarantined) ||
+ xoap->xoa_av_quarantined !=
+ ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) {
+ need_policy = TRUE;
+ } else {
+ XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
+ XVA_SET_REQ(tmpxvattr, XAT_AV_QUARANTINED);
+ }
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) {
+ mutex_exit(&zp->z_lock);
+ err = SET_ERROR(EPERM);
+ goto out3;
+ }
+
+ if (need_policy == FALSE &&
+ (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
+ XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
+ need_policy = TRUE;
+ }
+ }
+
+ mutex_exit(&zp->z_lock);
+
+ if (mask & ATTR_MODE) {
+ if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
+ err = secpolicy_setid_setsticky_clear(ip, vap,
+ &oldva, cr);
+ if (err)
+ goto out3;
+
+ trim_mask |= ATTR_MODE;
+ } else {
+ need_policy = TRUE;
+ }
+ }
+
+ if (need_policy) {
+ /*
+ * If trim_mask is set then take ownership
+ * has been granted or write_acl is present and user
+ * has the ability to modify mode. In that case remove
+ * UID|GID and or MODE from mask so that
+ * secpolicy_vnode_setattr() doesn't revoke it.
+ */
+
+ if (trim_mask) {
+ saved_mask = vap->va_mask;
+ vap->va_mask &= ~trim_mask;
+ }
+ err = secpolicy_vnode_setattr(cr, ip, vap, &oldva, flags,
+ (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
+ if (err)
+ goto out3;
+
+ if (trim_mask)
+ vap->va_mask |= saved_mask;
+ }
+
+ /*
+ * secpolicy_vnode_setattr, or take ownership may have
+ * changed va_mask
+ */
+ mask = vap->va_mask;
+
+ if ((mask & (ATTR_UID | ATTR_GID)) || projid != ZFS_INVALID_PROJID) {
+ handle_eadir = B_TRUE;
+ err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs),
+ &xattr_obj, sizeof (xattr_obj));
+
+ if (err == 0 && xattr_obj) {
+ err = zfs_zget(ZTOZSB(zp), xattr_obj, &attrzp);
+ if (err)
+ goto out2;
+ }
+ if (mask & ATTR_UID) {
+ new_kuid = zfs_fuid_create(zfsvfs,
+ (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
+ if (new_kuid != KUID_TO_SUID(ZTOI(zp)->i_uid) &&
+ zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT,
+ new_kuid)) {
+ if (attrzp)
+ zrele(attrzp);
+ err = SET_ERROR(EDQUOT);
+ goto out2;
+ }
+ }
+
+ if (mask & ATTR_GID) {
+ new_kgid = zfs_fuid_create(zfsvfs,
+ (uint64_t)vap->va_gid, cr, ZFS_GROUP, &fuidp);
+ if (new_kgid != KGID_TO_SGID(ZTOI(zp)->i_gid) &&
+ zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT,
+ new_kgid)) {
+ if (attrzp)
+ zrele(attrzp);
+ err = SET_ERROR(EDQUOT);
+ goto out2;
+ }
+ }
+
+ if (projid != ZFS_INVALID_PROJID &&
+ zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) {
+ if (attrzp)
+ zrele(attrzp);
+ err = EDQUOT;
+ goto out2;
+ }
+ }
+ tx = dmu_tx_create(os);
+
+ if (mask & ATTR_MODE) {
+ uint64_t pmode = zp->z_mode;
+ uint64_t acl_obj;
+ new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
+
+ if (ZTOZSB(zp)->z_acl_mode == ZFS_ACL_RESTRICTED &&
+ !(zp->z_pflags & ZFS_ACL_TRIVIAL)) {
+ err = EPERM;
+ goto out;
+ }
+
+ if ((err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)))
+ goto out;
+
+ mutex_enter(&zp->z_lock);
+ if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) {
+ /*
+ * Are we upgrading ACL from old V0 format
+ * to V1 format?
+ */
+ if (zfsvfs->z_version >= ZPL_VERSION_FUID &&
+ zfs_znode_acl_version(zp) ==
+ ZFS_ACL_VERSION_INITIAL) {
+ dmu_tx_hold_free(tx, acl_obj, 0,
+ DMU_OBJECT_END);
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, aclp->z_acl_bytes);
+ } else {
+ dmu_tx_hold_write(tx, acl_obj, 0,
+ aclp->z_acl_bytes);
+ }
+ } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
+ 0, aclp->z_acl_bytes);
+ }
+ mutex_exit(&zp->z_lock);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ } else {
+ if (((mask & ATTR_XVATTR) &&
+ XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) ||
+ (projid != ZFS_INVALID_PROJID &&
+ !(zp->z_pflags & ZFS_PROJID)))
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
+ else
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ }
+
+ if (attrzp) {
+ dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE);
+ }
+
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+
+ zfs_sa_upgrade_txholds(tx, zp);
+
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err)
+ goto out;
+
+ count = 0;
+ /*
+ * Set each attribute requested.
+ * We group settings according to the locks they need to acquire.
+ *
+ * Note: you cannot set ctime directly, although it will be
+ * updated as a side-effect of calling this function.
+ */
+
+ if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) {
+ /*
+ * For the existed object that is upgraded from old system,
+ * its on-disk layout has no slot for the project ID attribute.
+ * But quota accounting logic needs to access related slots by
+ * offset directly. So we need to adjust old objects' layout
+ * to make the project ID to some unified and fixed offset.
+ */
+ if (attrzp)
+ err = sa_add_projid(attrzp->z_sa_hdl, tx, projid);
+ if (err == 0)
+ err = sa_add_projid(zp->z_sa_hdl, tx, projid);
+
+ if (unlikely(err == EEXIST))
+ err = 0;
+ else if (err != 0)
+ goto out;
+ else
+ projid = ZFS_INVALID_PROJID;
+ }
+
+ if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
+ mutex_enter(&zp->z_acl_lock);
+ mutex_enter(&zp->z_lock);
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, sizeof (zp->z_pflags));
+
+ if (attrzp) {
+ if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
+ mutex_enter(&attrzp->z_acl_lock);
+ mutex_enter(&attrzp->z_lock);
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags,
+ sizeof (attrzp->z_pflags));
+ if (projid != ZFS_INVALID_PROJID) {
+ attrzp->z_projid = projid;
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid,
+ sizeof (attrzp->z_projid));
+ }
+ }
+
+ if (mask & (ATTR_UID|ATTR_GID)) {
+
+ if (mask & ATTR_UID) {
+ ZTOI(zp)->i_uid = SUID_TO_KUID(new_kuid);
+ new_uid = zfs_uid_read(ZTOI(zp));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
+ &new_uid, sizeof (new_uid));
+ if (attrzp) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_UID(zfsvfs), NULL, &new_uid,
+ sizeof (new_uid));
+ ZTOI(attrzp)->i_uid = SUID_TO_KUID(new_uid);
+ }
+ }
+
+ if (mask & ATTR_GID) {
+ ZTOI(zp)->i_gid = SGID_TO_KGID(new_kgid);
+ new_gid = zfs_gid_read(ZTOI(zp));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs),
+ NULL, &new_gid, sizeof (new_gid));
+ if (attrzp) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_GID(zfsvfs), NULL, &new_gid,
+ sizeof (new_gid));
+ ZTOI(attrzp)->i_gid = SGID_TO_KGID(new_kgid);
+ }
+ }
+ if (!(mask & ATTR_MODE)) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs),
+ NULL, &new_mode, sizeof (new_mode));
+ new_mode = zp->z_mode;
+ }
+ err = zfs_acl_chown_setattr(zp);
+ ASSERT(err == 0);
+ if (attrzp) {
+ err = zfs_acl_chown_setattr(attrzp);
+ ASSERT(err == 0);
+ }
+ }
+
+ if (mask & ATTR_MODE) {
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
+ &new_mode, sizeof (new_mode));
+ zp->z_mode = ZTOI(zp)->i_mode = new_mode;
+ ASSERT3P(aclp, !=, NULL);
+ err = zfs_aclset_common(zp, aclp, cr, tx);
+ ASSERT0(err);
+ if (zp->z_acl_cached)
+ zfs_acl_free(zp->z_acl_cached);
+ zp->z_acl_cached = aclp;
+ aclp = NULL;
+ }
+
+ if ((mask & ATTR_ATIME) || zp->z_atime_dirty) {
+ zp->z_atime_dirty = B_FALSE;
+ ZFS_TIME_ENCODE(&ip->i_atime, atime);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
+ &atime, sizeof (atime));
+ }
+
+ if (mask & (ATTR_MTIME | ATTR_SIZE)) {
+ ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
+ ZTOI(zp)->i_mtime = zpl_inode_timestamp_truncate(
+ vap->va_mtime, ZTOI(zp));
+
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
+ mtime, sizeof (mtime));
+ }
+
+ if (mask & (ATTR_CTIME | ATTR_SIZE)) {
+ ZFS_TIME_ENCODE(&vap->va_ctime, ctime);
+ ZTOI(zp)->i_ctime = zpl_inode_timestamp_truncate(vap->va_ctime,
+ ZTOI(zp));
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
+ ctime, sizeof (ctime));
+ }
+
+ if (projid != ZFS_INVALID_PROJID) {
+ zp->z_projid = projid;
+ SA_ADD_BULK_ATTR(bulk, count,
+ SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid,
+ sizeof (zp->z_projid));
+ }
+
+ if (attrzp && mask) {
+ SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
+ SA_ZPL_CTIME(zfsvfs), NULL, &ctime,
+ sizeof (ctime));
+ }
+
+ /*
+ * Do this after setting timestamps to prevent timestamp
+ * update from toggling bit
+ */
+
+ if (xoap && (mask & ATTR_XVATTR)) {
+
+ /*
+ * restore trimmed off masks
+ * so that return masks can be set for caller.
+ */
+
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_APPENDONLY)) {
+ XVA_SET_REQ(xvap, XAT_APPENDONLY);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_NOUNLINK)) {
+ XVA_SET_REQ(xvap, XAT_NOUNLINK);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_IMMUTABLE)) {
+ XVA_SET_REQ(xvap, XAT_IMMUTABLE);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_NODUMP)) {
+ XVA_SET_REQ(xvap, XAT_NODUMP);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_MODIFIED)) {
+ XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_AV_QUARANTINED)) {
+ XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
+ }
+ if (XVA_ISSET_REQ(tmpxvattr, XAT_PROJINHERIT)) {
+ XVA_SET_REQ(xvap, XAT_PROJINHERIT);
+ }
+
+ if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP))
+ ASSERT(S_ISREG(ip->i_mode));
+
+ zfs_xvattr_set(zp, xvap, tx);
+ }
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ if (mask != 0)
+ zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
+
+ mutex_exit(&zp->z_lock);
+ if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
+ mutex_exit(&zp->z_acl_lock);
+
+ if (attrzp) {
+ if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE))
+ mutex_exit(&attrzp->z_acl_lock);
+ mutex_exit(&attrzp->z_lock);
+ }
+out:
+ if (err == 0 && xattr_count > 0) {
+ err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk,
+ xattr_count, tx);
+ ASSERT(err2 == 0);
+ }
+
+ if (aclp)
+ zfs_acl_free(aclp);
+
+ if (fuidp) {
+ zfs_fuid_info_free(fuidp);
+ fuidp = NULL;
+ }
+
+ if (err) {
+ dmu_tx_abort(tx);
+ if (attrzp)
+ zrele(attrzp);
+ if (err == ERESTART)
+ goto top;
+ } else {
+ if (count > 0)
+ err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ dmu_tx_commit(tx);
+ if (attrzp) {
+ if (err2 == 0 && handle_eadir)
+ err2 = zfs_setattr_dir(attrzp);
+ zrele(attrzp);
+ }
+ zfs_inode_update(zp);
+ }
+
+out2:
+ if (os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+out3:
+ kmem_free(xattr_bulk, sizeof (sa_bulk_attr_t) * bulks);
+ kmem_free(bulk, sizeof (sa_bulk_attr_t) * bulks);
+ kmem_free(tmpxvattr, sizeof (xvattr_t));
+ ZFS_EXIT(zfsvfs);
+ return (err);
+}
+
+typedef struct zfs_zlock {
+ krwlock_t *zl_rwlock; /* lock we acquired */
+ znode_t *zl_znode; /* znode we held */
+ struct zfs_zlock *zl_next; /* next in list */
+} zfs_zlock_t;
+
+/*
+ * Drop locks and release vnodes that were held by zfs_rename_lock().
+ */
+static void
+zfs_rename_unlock(zfs_zlock_t **zlpp)
+{
+ zfs_zlock_t *zl;
+
+ while ((zl = *zlpp) != NULL) {
+ if (zl->zl_znode != NULL)
+ zfs_zrele_async(zl->zl_znode);
+ rw_exit(zl->zl_rwlock);
+ *zlpp = zl->zl_next;
+ kmem_free(zl, sizeof (*zl));
+ }
+}
+
+/*
+ * Search back through the directory tree, using the ".." entries.
+ * Lock each directory in the chain to prevent concurrent renames.
+ * Fail any attempt to move a directory into one of its own descendants.
+ * XXX - z_parent_lock can overlap with map or grow locks
+ */
+static int
+zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp)
+{
+ zfs_zlock_t *zl;
+ znode_t *zp = tdzp;
+ uint64_t rootid = ZTOZSB(zp)->z_root;
+ uint64_t oidp = zp->z_id;
+ krwlock_t *rwlp = &szp->z_parent_lock;
+ krw_t rw = RW_WRITER;
+
+ /*
+ * First pass write-locks szp and compares to zp->z_id.
+ * Later passes read-lock zp and compare to zp->z_parent.
+ */
+ do {
+ if (!rw_tryenter(rwlp, rw)) {
+ /*
+ * Another thread is renaming in this path.
+ * Note that if we are a WRITER, we don't have any
+ * parent_locks held yet.
+ */
+ if (rw == RW_READER && zp->z_id > szp->z_id) {
+ /*
+ * Drop our locks and restart
+ */
+ zfs_rename_unlock(&zl);
+ *zlpp = NULL;
+ zp = tdzp;
+ oidp = zp->z_id;
+ rwlp = &szp->z_parent_lock;
+ rw = RW_WRITER;
+ continue;
+ } else {
+ /*
+ * Wait for other thread to drop its locks
+ */
+ rw_enter(rwlp, rw);
+ }
+ }
+
+ zl = kmem_alloc(sizeof (*zl), KM_SLEEP);
+ zl->zl_rwlock = rwlp;
+ zl->zl_znode = NULL;
+ zl->zl_next = *zlpp;
+ *zlpp = zl;
+
+ if (oidp == szp->z_id) /* We're a descendant of szp */
+ return (SET_ERROR(EINVAL));
+
+ if (oidp == rootid) /* We've hit the top */
+ return (0);
+
+ if (rw == RW_READER) { /* i.e. not the first pass */
+ int error = zfs_zget(ZTOZSB(zp), oidp, &zp);
+ if (error)
+ return (error);
+ zl->zl_znode = zp;
+ }
+ (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(ZTOZSB(zp)),
+ &oidp, sizeof (oidp));
+ rwlp = &zp->z_parent_lock;
+ rw = RW_READER;
+
+ } while (zp->z_id != sdzp->z_id);
+
+ return (0);
+}
+
+/*
+ * Move an entry from the provided source directory to the target
+ * directory. Change the entry name as indicated.
+ *
+ * IN: sdzp - Source directory containing the "old entry".
+ * snm - Old entry name.
+ * tdzp - Target directory to contain the "new entry".
+ * tnm - New entry name.
+ * cr - credentials of caller.
+ * flags - case flags
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * sdzp,tdzp - ctime|mtime updated
+ */
+/*ARGSUSED*/
+int
+zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp, char *tnm,
+ cred_t *cr, int flags)
+{
+ znode_t *szp, *tzp;
+ zfsvfs_t *zfsvfs = ZTOZSB(sdzp);
+ zilog_t *zilog;
+ zfs_dirlock_t *sdl, *tdl;
+ dmu_tx_t *tx;
+ zfs_zlock_t *zl;
+ int cmp, serr, terr;
+ int error = 0;
+ int zflg = 0;
+ boolean_t waited = B_FALSE;
+
+ if (snm == NULL || tnm == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(sdzp);
+ zilog = zfsvfs->z_log;
+
+ ZFS_VERIFY_ZP(tdzp);
+
+ /*
+ * We check i_sb because snapshots and the ctldir must have different
+ * super blocks.
+ */
+ if (ZTOI(tdzp)->i_sb != ZTOI(sdzp)->i_sb ||
+ zfsctl_is_node(ZTOI(tdzp))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EXDEV));
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(tnm,
+ strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+
+ if (flags & FIGNORECASE)
+ zflg |= ZCILOOK;
+
+top:
+ szp = NULL;
+ tzp = NULL;
+ zl = NULL;
+
+ /*
+ * This is to prevent the creation of links into attribute space
+ * by renaming a linked file into/outof an attribute directory.
+ * See the comment in zfs_link() for why this is considered bad.
+ */
+ if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Lock source and target directory entries. To prevent deadlock,
+ * a lock ordering must be defined. We lock the directory with
+ * the smallest object id first, or if it's a tie, the one with
+ * the lexically first name.
+ */
+ if (sdzp->z_id < tdzp->z_id) {
+ cmp = -1;
+ } else if (sdzp->z_id > tdzp->z_id) {
+ cmp = 1;
+ } else {
+ /*
+ * First compare the two name arguments without
+ * considering any case folding.
+ */
+ int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER);
+
+ cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error);
+ ASSERT(error == 0 || !zfsvfs->z_utf8);
+ if (cmp == 0) {
+ /*
+ * POSIX: "If the old argument and the new argument
+ * both refer to links to the same existing file,
+ * the rename() function shall return successfully
+ * and perform no other action."
+ */
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+ /*
+ * If the file system is case-folding, then we may
+ * have some more checking to do. A case-folding file
+ * system is either supporting mixed case sensitivity
+ * access or is completely case-insensitive. Note
+ * that the file system is always case preserving.
+ *
+ * In mixed sensitivity mode case sensitive behavior
+ * is the default. FIGNORECASE must be used to
+ * explicitly request case insensitive behavior.
+ *
+ * If the source and target names provided differ only
+ * by case (e.g., a request to rename 'tim' to 'Tim'),
+ * we will treat this as a special case in the
+ * case-insensitive mode: as long as the source name
+ * is an exact match, we will allow this to proceed as
+ * a name-change request.
+ */
+ if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
+ (zfsvfs->z_case == ZFS_CASE_MIXED &&
+ flags & FIGNORECASE)) &&
+ u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST,
+ &error) == 0) {
+ /*
+ * case preserving rename request, require exact
+ * name matches
+ */
+ zflg |= ZCIEXACT;
+ zflg &= ~ZCILOOK;
+ }
+ }
+
+ /*
+ * If the source and destination directories are the same, we should
+ * grab the z_name_lock of that directory only once.
+ */
+ if (sdzp == tdzp) {
+ zflg |= ZHAVELOCK;
+ rw_enter(&sdzp->z_name_lock, RW_READER);
+ }
+
+ if (cmp < 0) {
+ serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp,
+ ZEXISTS | zflg, NULL, NULL);
+ terr = zfs_dirent_lock(&tdl,
+ tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL);
+ } else {
+ terr = zfs_dirent_lock(&tdl,
+ tdzp, tnm, &tzp, zflg, NULL, NULL);
+ serr = zfs_dirent_lock(&sdl,
+ sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg,
+ NULL, NULL);
+ }
+
+ if (serr) {
+ /*
+ * Source entry invalid or not there.
+ */
+ if (!terr) {
+ zfs_dirent_unlock(tdl);
+ if (tzp)
+ zrele(tzp);
+ }
+
+ if (sdzp == tdzp)
+ rw_exit(&sdzp->z_name_lock);
+
+ if (strcmp(snm, "..") == 0)
+ serr = EINVAL;
+ ZFS_EXIT(zfsvfs);
+ return (serr);
+ }
+ if (terr) {
+ zfs_dirent_unlock(sdl);
+ zrele(szp);
+
+ if (sdzp == tdzp)
+ rw_exit(&sdzp->z_name_lock);
+
+ if (strcmp(tnm, "..") == 0)
+ terr = EINVAL;
+ ZFS_EXIT(zfsvfs);
+ return (terr);
+ }
+
+ /*
+ * If we are using project inheritance, means if the directory has
+ * ZFS_PROJINHERIT set, then its descendant directories will inherit
+ * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
+ * such case, we only allow renames into our tree when the project
+ * IDs are the same.
+ */
+ if (tdzp->z_pflags & ZFS_PROJINHERIT &&
+ tdzp->z_projid != szp->z_projid) {
+ error = SET_ERROR(EXDEV);
+ goto out;
+ }
+
+ /*
+ * Must have write access at the source to remove the old entry
+ * and write access at the target to create the new entry.
+ * Note that if target and source are the same, this can be
+ * done in a single check.
+ */
+
+ if ((error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)))
+ goto out;
+
+ if (S_ISDIR(ZTOI(szp)->i_mode)) {
+ /*
+ * Check to make sure rename is valid.
+ * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
+ */
+ if ((error = zfs_rename_lock(szp, tdzp, sdzp, &zl)))
+ goto out;
+ }
+
+ /*
+ * Does target exist?
+ */
+ if (tzp) {
+ /*
+ * Source and target must be the same type.
+ */
+ if (S_ISDIR(ZTOI(szp)->i_mode)) {
+ if (!S_ISDIR(ZTOI(tzp)->i_mode)) {
+ error = SET_ERROR(ENOTDIR);
+ goto out;
+ }
+ } else {
+ if (S_ISDIR(ZTOI(tzp)->i_mode)) {
+ error = SET_ERROR(EISDIR);
+ goto out;
+ }
+ }
+ /*
+ * POSIX dictates that when the source and target
+ * entries refer to the same file object, rename
+ * must do nothing and exit without error.
+ */
+ if (szp->z_id == tzp->z_id) {
+ error = 0;
+ goto out;
+ }
+ }
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
+ dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
+ if (sdzp != tdzp) {
+ dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, tdzp);
+ }
+ if (tzp) {
+ dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, tzp);
+ }
+
+ zfs_sa_upgrade_txholds(tx, szp);
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ if (zl != NULL)
+ zfs_rename_unlock(&zl);
+ zfs_dirent_unlock(sdl);
+ zfs_dirent_unlock(tdl);
+
+ if (sdzp == tdzp)
+ rw_exit(&sdzp->z_name_lock);
+
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ zrele(szp);
+ if (tzp)
+ zrele(tzp);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ zrele(szp);
+ if (tzp)
+ zrele(tzp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (tzp) /* Attempt to remove the existing target */
+ error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL);
+
+ if (error == 0) {
+ error = zfs_link_create(tdl, szp, tx, ZRENAMING);
+ if (error == 0) {
+ szp->z_pflags |= ZFS_AV_MODIFIED;
+ if (tdzp->z_pflags & ZFS_PROJINHERIT)
+ szp->z_pflags |= ZFS_PROJINHERIT;
+
+ error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs),
+ (void *)&szp->z_pflags, sizeof (uint64_t), tx);
+ ASSERT0(error);
+
+ error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL);
+ if (error == 0) {
+ zfs_log_rename(zilog, tx, TX_RENAME |
+ (flags & FIGNORECASE ? TX_CI : 0), sdzp,
+ sdl->dl_name, tdzp, tdl->dl_name, szp);
+ } else {
+ /*
+ * At this point, we have successfully created
+ * the target name, but have failed to remove
+ * the source name. Since the create was done
+ * with the ZRENAMING flag, there are
+ * complications; for one, the link count is
+ * wrong. The easiest way to deal with this
+ * is to remove the newly created target, and
+ * return the original error. This must
+ * succeed; fortunately, it is very unlikely to
+ * fail, since we just created it.
+ */
+ VERIFY3U(zfs_link_destroy(tdl, szp, tx,
+ ZRENAMING, NULL), ==, 0);
+ }
+ } else {
+ /*
+ * If we had removed the existing target, subsequent
+ * call to zfs_link_create() to add back the same entry
+ * but, the new dnode (szp) should not fail.
+ */
+ ASSERT(tzp == NULL);
+ }
+ }
+
+ dmu_tx_commit(tx);
+out:
+ if (zl != NULL)
+ zfs_rename_unlock(&zl);
+
+ zfs_dirent_unlock(sdl);
+ zfs_dirent_unlock(tdl);
+
+ zfs_inode_update(sdzp);
+ if (sdzp == tdzp)
+ rw_exit(&sdzp->z_name_lock);
+
+ if (sdzp != tdzp)
+ zfs_inode_update(tdzp);
+
+ zfs_inode_update(szp);
+ zrele(szp);
+ if (tzp) {
+ zfs_inode_update(tzp);
+ zrele(tzp);
+ }
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Insert the indicated symbolic reference entry into the directory.
+ *
+ * IN: dzp - Directory to contain new symbolic link.
+ * name - Name of directory entry in dip.
+ * vap - Attributes of new entry.
+ * link - Name for new symlink entry.
+ * cr - credentials of caller.
+ * flags - case flags
+ *
+ * OUT: zpp - Znode for new symbolic link.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * dip - ctime|mtime updated
+ */
+/*ARGSUSED*/
+int
+zfs_symlink(znode_t *dzp, char *name, vattr_t *vap, char *link,
+ znode_t **zpp, cred_t *cr, int flags)
+{
+ znode_t *zp;
+ zfs_dirlock_t *dl;
+ dmu_tx_t *tx;
+ zfsvfs_t *zfsvfs = ZTOZSB(dzp);
+ zilog_t *zilog;
+ uint64_t len = strlen(link);
+ int error;
+ int zflg = ZNEW;
+ zfs_acl_ids_t acl_ids;
+ boolean_t fuid_dirtied;
+ uint64_t txtype = TX_SYMLINK;
+ boolean_t waited = B_FALSE;
+
+ ASSERT(S_ISLNK(vap->va_mode));
+
+ if (name == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(dzp);
+ zilog = zfsvfs->z_log;
+
+ if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
+ NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+ if (flags & FIGNORECASE)
+ zflg |= ZCILOOK;
+
+ if (len > MAXPATHLEN) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENAMETOOLONG));
+ }
+
+ if ((error = zfs_acl_ids_create(dzp, 0,
+ vap, cr, NULL, &acl_ids)) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+top:
+ *zpp = NULL;
+
+ /*
+ * Attempt to lock directory; fail if entry already exists.
+ */
+ error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL);
+ if (error) {
+ zfs_acl_ids_free(&acl_ids);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ zfs_acl_ids_free(&acl_ids);
+ zfs_dirent_unlock(dl);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, ZFS_DEFAULT_PROJID)) {
+ zfs_acl_ids_free(&acl_ids);
+ zfs_dirent_unlock(dl);
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EDQUOT));
+ }
+ tx = dmu_tx_create(zfsvfs->z_os);
+ fuid_dirtied = zfsvfs->z_fuid_dirty;
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
+ dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
+ dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
+ ZFS_SA_BASE_ATTR_SIZE + len);
+ dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
+ if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
+ dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
+ acl_ids.z_aclp->z_acl_bytes);
+ }
+ if (fuid_dirtied)
+ zfs_fuid_txhold(zfsvfs, tx);
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ zfs_acl_ids_free(&acl_ids);
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ /*
+ * Create a new object for the symlink.
+ * for version 4 ZPL datsets the symlink will be an SA attribute
+ */
+ zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids);
+
+ if (fuid_dirtied)
+ zfs_fuid_sync(zfsvfs, tx);
+
+ mutex_enter(&zp->z_lock);
+ if (zp->z_is_sa)
+ error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs),
+ link, len, tx);
+ else
+ zfs_sa_symlink(zp, link, len, tx);
+ mutex_exit(&zp->z_lock);
+
+ zp->z_size = len;
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+ &zp->z_size, sizeof (zp->z_size), tx);
+ /*
+ * Insert the new object into the directory.
+ */
+ error = zfs_link_create(dl, zp, tx, ZNEW);
+ if (error != 0) {
+ zfs_znode_delete(zp, tx);
+ remove_inode_hash(ZTOI(zp));
+ } else {
+ if (flags & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
+
+ zfs_inode_update(dzp);
+ zfs_inode_update(zp);
+ }
+
+ zfs_acl_ids_free(&acl_ids);
+
+ dmu_tx_commit(tx);
+
+ zfs_dirent_unlock(dl);
+
+ if (error == 0) {
+ *zpp = zp;
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+ } else {
+ zrele(zp);
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Return, in the buffer contained in the provided uio structure,
+ * the symbolic path referred to by ip.
+ *
+ * IN: ip - inode of symbolic link
+ * uio - structure to contain the link path.
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * ip - atime updated
+ */
+/* ARGSUSED */
+int
+zfs_readlink(struct inode *ip, uio_t *uio, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ mutex_enter(&zp->z_lock);
+ if (zp->z_is_sa)
+ error = sa_lookup_uio(zp->z_sa_hdl,
+ SA_ZPL_SYMLINK(zfsvfs), uio);
+ else
+ error = zfs_sa_readlink(zp, uio);
+ mutex_exit(&zp->z_lock);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Insert a new entry into directory tdzp referencing szp.
+ *
+ * IN: tdzp - Directory to contain new entry.
+ * szp - znode of new entry.
+ * name - name of new entry.
+ * cr - credentials of caller.
+ * flags - case flags.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * tdzp - ctime|mtime updated
+ * szp - ctime updated
+ */
+/* ARGSUSED */
+int
+zfs_link(znode_t *tdzp, znode_t *szp, char *name, cred_t *cr,
+ int flags)
+{
+ struct inode *sip = ZTOI(szp);
+ znode_t *tzp;
+ zfsvfs_t *zfsvfs = ZTOZSB(tdzp);
+ zilog_t *zilog;
+ zfs_dirlock_t *dl;
+ dmu_tx_t *tx;
+ int error;
+ int zf = ZNEW;
+ uint64_t parent;
+ uid_t owner;
+ boolean_t waited = B_FALSE;
+ boolean_t is_tmpfile = 0;
+ uint64_t txg;
+#ifdef HAVE_TMPFILE
+ is_tmpfile = (sip->i_nlink == 0 && (sip->i_state & I_LINKABLE));
+#endif
+ ASSERT(S_ISDIR(ZTOI(tdzp)->i_mode));
+
+ if (name == NULL)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(tdzp);
+ zilog = zfsvfs->z_log;
+
+ /*
+ * POSIX dictates that we return EPERM here.
+ * Better choices include ENOTSUP or EISDIR.
+ */
+ if (S_ISDIR(sip->i_mode)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ ZFS_VERIFY_ZP(szp);
+
+ /*
+ * If we are using project inheritance, means if the directory has
+ * ZFS_PROJINHERIT set, then its descendant directories will inherit
+ * not only the project ID, but also the ZFS_PROJINHERIT flag. Under
+ * such case, we only allow hard link creation in our tree when the
+ * project IDs are the same.
+ */
+ if (tdzp->z_pflags & ZFS_PROJINHERIT &&
+ tdzp->z_projid != szp->z_projid) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EXDEV));
+ }
+
+ /*
+ * We check i_sb because snapshots and the ctldir must have different
+ * super blocks.
+ */
+ if (sip->i_sb != ZTOI(tdzp)->i_sb || zfsctl_is_node(sip)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EXDEV));
+ }
+
+ /* Prevent links to .zfs/shares files */
+
+ if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs),
+ &parent, sizeof (uint64_t))) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ if (parent == zfsvfs->z_shares_dir) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if (zfsvfs->z_utf8 && u8_validate(name,
+ strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EILSEQ));
+ }
+ if (flags & FIGNORECASE)
+ zf |= ZCILOOK;
+
+ /*
+ * We do not support links between attributes and non-attributes
+ * because of the potential security risk of creating links
+ * into "normal" file space in order to circumvent restrictions
+ * imposed in attribute space.
+ */
+ if ((szp->z_pflags & ZFS_XATTR) != (tdzp->z_pflags & ZFS_XATTR)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ owner = zfs_fuid_map_id(zfsvfs, KUID_TO_SUID(sip->i_uid),
+ cr, ZFS_OWNER);
+ if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if ((error = zfs_zaccess(tdzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+top:
+ /*
+ * Attempt to lock directory; fail if entry already exists.
+ */
+ error = zfs_dirent_lock(&dl, tdzp, name, &tzp, zf, NULL, NULL);
+ if (error) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE);
+ dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, name);
+ if (is_tmpfile)
+ dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
+
+ zfs_sa_upgrade_txholds(tx, szp);
+ zfs_sa_upgrade_txholds(tx, tdzp);
+ error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT);
+ if (error) {
+ zfs_dirent_unlock(dl);
+ if (error == ERESTART) {
+ waited = B_TRUE;
+ dmu_tx_wait(tx);
+ dmu_tx_abort(tx);
+ goto top;
+ }
+ dmu_tx_abort(tx);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+ /* unmark z_unlinked so zfs_link_create will not reject */
+ if (is_tmpfile)
+ szp->z_unlinked = B_FALSE;
+ error = zfs_link_create(dl, szp, tx, 0);
+
+ if (error == 0) {
+ uint64_t txtype = TX_LINK;
+ /*
+ * tmpfile is created to be in z_unlinkedobj, so remove it.
+ * Also, we don't log in ZIL, because all previous file
+ * operation on the tmpfile are ignored by ZIL. Instead we
+ * always wait for txg to sync to make sure all previous
+ * operation are sync safe.
+ */
+ if (is_tmpfile) {
+ VERIFY(zap_remove_int(zfsvfs->z_os,
+ zfsvfs->z_unlinkedobj, szp->z_id, tx) == 0);
+ } else {
+ if (flags & FIGNORECASE)
+ txtype |= TX_CI;
+ zfs_log_link(zilog, tx, txtype, tdzp, szp, name);
+ }
+ } else if (is_tmpfile) {
+ /* restore z_unlinked since when linking failed */
+ szp->z_unlinked = B_TRUE;
+ }
+ txg = dmu_tx_get_txg(tx);
+ dmu_tx_commit(tx);
+
+ zfs_dirent_unlock(dl);
+
+ if (!is_tmpfile && zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ if (is_tmpfile && zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED)
+ txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), txg);
+
+ zfs_inode_update(tdzp);
+ zfs_inode_update(szp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+static void
+zfs_putpage_commit_cb(void *arg)
+{
+ struct page *pp = arg;
+
+ ClearPageError(pp);
+ end_page_writeback(pp);
+}
+
+/*
+ * Push a page out to disk, once the page is on stable storage the
+ * registered commit callback will be run as notification of completion.
+ *
+ * IN: ip - page mapped for inode.
+ * pp - page to push (page is locked)
+ * wbc - writeback control data
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * ip - ctime|mtime updated
+ */
+/* ARGSUSED */
+int
+zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ loff_t offset;
+ loff_t pgoff;
+ unsigned int pglen;
+ dmu_tx_t *tx;
+ caddr_t va;
+ int err = 0;
+ uint64_t mtime[2], ctime[2];
+ sa_bulk_attr_t bulk[3];
+ int cnt = 0;
+ struct address_space *mapping;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ ASSERT(PageLocked(pp));
+
+ pgoff = page_offset(pp); /* Page byte-offset in file */
+ offset = i_size_read(ip); /* File length in bytes */
+ pglen = MIN(PAGE_SIZE, /* Page length in bytes */
+ P2ROUNDUP(offset, PAGE_SIZE)-pgoff);
+
+ /* Page is beyond end of file */
+ if (pgoff >= offset) {
+ unlock_page(pp);
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+ /* Truncate page length to end of file */
+ if (pgoff + pglen > offset)
+ pglen = offset - pgoff;
+
+#if 0
+ /*
+ * FIXME: Allow mmap writes past its quota. The correct fix
+ * is to register a page_mkwrite() handler to count the page
+ * against its quota when it is about to be dirtied.
+ */
+ if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT,
+ KUID_TO_SUID(ip->i_uid)) ||
+ zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT,
+ KGID_TO_SGID(ip->i_gid)) ||
+ (zp->z_projid != ZFS_DEFAULT_PROJID &&
+ zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
+ zp->z_projid))) {
+ err = EDQUOT;
+ }
+#endif
+
+ /*
+ * The ordering here is critical and must adhere to the following
+ * rules in order to avoid deadlocking in either zfs_read() or
+ * zfs_free_range() due to a lock inversion.
+ *
+ * 1) The page must be unlocked prior to acquiring the range lock.
+ * This is critical because zfs_read() calls find_lock_page()
+ * which may block on the page lock while holding the range lock.
+ *
+ * 2) Before setting or clearing write back on a page the range lock
+ * must be held in order to prevent a lock inversion with the
+ * zfs_free_range() function.
+ *
+ * This presents a problem because upon entering this function the
+ * page lock is already held. To safely acquire the range lock the
+ * page lock must be dropped. This creates a window where another
+ * process could truncate, invalidate, dirty, or write out the page.
+ *
+ * Therefore, after successfully reacquiring the range and page locks
+ * the current page state is checked. In the common case everything
+ * will be as is expected and it can be written out. However, if
+ * the page state has changed it must be handled accordingly.
+ */
+ mapping = pp->mapping;
+ redirty_page_for_writepage(wbc, pp);
+ unlock_page(pp);
+
+ zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock,
+ pgoff, pglen, RL_WRITER);
+ lock_page(pp);
+
+ /* Page mapping changed or it was no longer dirty, we're done */
+ if (unlikely((mapping != pp->mapping) || !PageDirty(pp))) {
+ unlock_page(pp);
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+ /* Another process started write block if required */
+ if (PageWriteback(pp)) {
+ unlock_page(pp);
+ zfs_rangelock_exit(lr);
+
+ if (wbc->sync_mode != WB_SYNC_NONE) {
+ if (PageWriteback(pp))
+ wait_on_page_bit(pp, PG_writeback);
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+ /* Clear the dirty flag the required locks are held */
+ if (!clear_page_dirty_for_io(pp)) {
+ unlock_page(pp);
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+ /*
+ * Counterpart for redirty_page_for_writepage() above. This page
+ * was in fact not skipped and should not be counted as if it were.
+ */
+ wbc->pages_skipped--;
+ set_page_writeback(pp);
+ unlock_page(pp);
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_write(tx, zp->z_id, pgoff, pglen);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+
+ err = dmu_tx_assign(tx, TXG_NOWAIT);
+ if (err != 0) {
+ if (err == ERESTART)
+ dmu_tx_wait(tx);
+
+ dmu_tx_abort(tx);
+ __set_page_dirty_nobuffers(pp);
+ ClearPageError(pp);
+ end_page_writeback(pp);
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (err);
+ }
+
+ va = kmap(pp);
+ ASSERT3U(pglen, <=, PAGE_SIZE);
+ dmu_write(zfsvfs->z_os, zp->z_id, pgoff, pglen, va, tx);
+ kunmap(pp);
+
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, 8);
+
+ /* Preserve the mtime and ctime provided by the inode */
+ ZFS_TIME_ENCODE(&ip->i_mtime, mtime);
+ ZFS_TIME_ENCODE(&ip->i_ctime, ctime);
+ zp->z_atime_dirty = B_FALSE;
+ zp->z_seq++;
+
+ err = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx);
+
+ zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, pgoff, pglen, 0,
+ zfs_putpage_commit_cb, pp);
+ dmu_tx_commit(tx);
+
+ zfs_rangelock_exit(lr);
+
+ if (wbc->sync_mode != WB_SYNC_NONE) {
+ /*
+ * Note that this is rarely called under writepages(), because
+ * writepages() normally handles the entire commit for
+ * performance reasons.
+ */
+ zil_commit(zfsvfs->z_log, zp->z_id);
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (err);
+}
+
+/*
+ * Update the system attributes when the inode has been dirtied. For the
+ * moment we only update the mode, atime, mtime, and ctime.
+ */
+int
+zfs_dirty_inode(struct inode *ip, int flags)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ dmu_tx_t *tx;
+ uint64_t mode, atime[2], mtime[2], ctime[2];
+ sa_bulk_attr_t bulk[4];
+ int error = 0;
+ int cnt = 0;
+
+ if (zfs_is_readonly(zfsvfs) || dmu_objset_is_snapshot(zfsvfs->z_os))
+ return (0);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+#ifdef I_DIRTY_TIME
+ /*
+ * This is the lazytime semantic introduced in Linux 4.0
+ * This flag will only be called from update_time when lazytime is set.
+ * (Note, I_DIRTY_SYNC will also set if not lazytime)
+ * Fortunately mtime and ctime are managed within ZFS itself, so we
+ * only need to dirty atime.
+ */
+ if (flags == I_DIRTY_TIME) {
+ zp->z_atime_dirty = B_TRUE;
+ goto out;
+ }
+#endif
+
+ tx = dmu_tx_create(zfsvfs->z_os);
+
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ goto out;
+ }
+
+ mutex_enter(&zp->z_lock);
+ zp->z_atime_dirty = B_FALSE;
+
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16);
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+
+ /* Preserve the mode, mtime and ctime provided by the inode */
+ ZFS_TIME_ENCODE(&ip->i_atime, atime);
+ ZFS_TIME_ENCODE(&ip->i_mtime, mtime);
+ ZFS_TIME_ENCODE(&ip->i_ctime, ctime);
+ mode = ip->i_mode;
+
+ zp->z_mode = mode;
+
+ error = sa_bulk_update(zp->z_sa_hdl, bulk, cnt, tx);
+ mutex_exit(&zp->z_lock);
+
+ dmu_tx_commit(tx);
+out:
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*ARGSUSED*/
+void
+zfs_inactive(struct inode *ip)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ uint64_t atime[2];
+ int error;
+ int need_unlock = 0;
+
+ /* Only read lock if we haven't already write locked, e.g. rollback */
+ if (!RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)) {
+ need_unlock = 1;
+ rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER);
+ }
+ if (zp->z_sa_hdl == NULL) {
+ if (need_unlock)
+ rw_exit(&zfsvfs->z_teardown_inactive_lock);
+ return;
+ }
+
+ if (zp->z_atime_dirty && zp->z_unlinked == B_FALSE) {
+ dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ } else {
+ ZFS_TIME_ENCODE(&ip->i_atime, atime);
+ mutex_enter(&zp->z_lock);
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs),
+ (void *)&atime, sizeof (atime), tx);
+ zp->z_atime_dirty = B_FALSE;
+ mutex_exit(&zp->z_lock);
+ dmu_tx_commit(tx);
+ }
+ }
+
+ zfs_zinactive(zp);
+ if (need_unlock)
+ rw_exit(&zfsvfs->z_teardown_inactive_lock);
+}
+
+/*
+ * Fill pages with data from the disk.
+ */
+static int
+zfs_fillpage(struct inode *ip, struct page *pl[], int nr_pages)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ objset_t *os;
+ struct page *cur_pp;
+ u_offset_t io_off, total;
+ size_t io_len;
+ loff_t i_size;
+ unsigned page_idx;
+ int err;
+
+ os = zfsvfs->z_os;
+ io_len = nr_pages << PAGE_SHIFT;
+ i_size = i_size_read(ip);
+ io_off = page_offset(pl[0]);
+
+ if (io_off + io_len > i_size)
+ io_len = i_size - io_off;
+
+ /*
+ * Iterate over list of pages and read each page individually.
+ */
+ page_idx = 0;
+ for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
+ caddr_t va;
+
+ cur_pp = pl[page_idx++];
+ va = kmap(cur_pp);
+ err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va,
+ DMU_READ_PREFETCH);
+ kunmap(cur_pp);
+ if (err) {
+ /* convert checksum errors into IO errors */
+ if (err == ECKSUM)
+ err = SET_ERROR(EIO);
+ return (err);
+ }
+ }
+
+ return (0);
+}
+
+/*
+ * Uses zfs_fillpage to read data from the file and fill the pages.
+ *
+ * IN: ip - inode of file to get data from.
+ * pl - list of pages to read
+ * nr_pages - number of pages to read
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * vp - atime updated
+ */
+/* ARGSUSED */
+int
+zfs_getpage(struct inode *ip, struct page *pl[], int nr_pages)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ int err;
+
+ if (pl == NULL)
+ return (0);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ err = zfs_fillpage(ip, pl, nr_pages);
+
+ ZFS_EXIT(zfsvfs);
+ return (err);
+}
+
+/*
+ * Check ZFS specific permissions to memory map a section of a file.
+ *
+ * IN: ip - inode of the file to mmap
+ * off - file offset
+ * addrp - start address in memory region
+ * len - length of memory region
+ * vm_flags- address flags
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ */
+/*ARGSUSED*/
+int
+zfs_map(struct inode *ip, offset_t off, caddr_t *addrp, size_t len,
+ unsigned long vm_flags)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((vm_flags & VM_WRITE) && (zp->z_pflags &
+ (ZFS_IMMUTABLE | ZFS_READONLY | ZFS_APPENDONLY))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ if ((vm_flags & (VM_READ | VM_EXEC)) &&
+ (zp->z_pflags & ZFS_AV_QUARANTINED)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EACCES));
+ }
+
+ if (off < 0 || len > MAXOFFSET_T - off) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(ENXIO));
+ }
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*
+ * Free or allocate space in a file. Currently, this function only
+ * supports the `F_FREESP' command. However, this command is somewhat
+ * misnamed, as its functionality includes the ability to allocate as
+ * well as free space.
+ *
+ * IN: zp - znode of file to free data in.
+ * cmd - action to take (only F_FREESP supported).
+ * bfp - section of file to free/alloc.
+ * flag - current file open mode flags.
+ * offset - current file offset.
+ * cr - credentials of caller.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Timestamps:
+ * zp - ctime|mtime updated
+ */
+/* ARGSUSED */
+int
+zfs_space(znode_t *zp, int cmd, flock64_t *bfp, int flag,
+ offset_t offset, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ uint64_t off, len;
+ int error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (cmd != F_FREESP) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Callers might not be able to detect properly that we are read-only,
+ * so check it explicitly here.
+ */
+ if (zfs_is_readonly(zfsvfs)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EROFS));
+ }
+
+ if (bfp->l_len < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Permissions aren't checked on Solaris because on this OS
+ * zfs_space() can only be called with an opened file handle.
+ * On Linux we can get here through truncate_range() which
+ * operates directly on inodes, so we need to check access rights.
+ */
+ if ((error = zfs_zaccess(zp, ACE_WRITE_DATA, 0, B_FALSE, cr))) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ off = bfp->l_start;
+ len = bfp->l_len; /* 0 means from off to end of file */
+
+ error = zfs_freesp(zp, off, len, flag, TRUE);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*ARGSUSED*/
+int
+zfs_fid(struct inode *ip, fid_t *fidp)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ uint32_t gen;
+ uint64_t gen64;
+ uint64_t object = zp->z_id;
+ zfid_short_t *zfid;
+ int size, i, error;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs),
+ &gen64, sizeof (uint64_t))) != 0) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ gen = (uint32_t)gen64;
+
+ size = SHORT_FID_LEN;
+
+ zfid = (zfid_short_t *)fidp;
+
+ zfid->zf_len = size;
+
+ for (i = 0; i < sizeof (zfid->zf_object); i++)
+ zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
+
+ /* Must have a non-zero generation number to distinguish from .zfs */
+ if (gen == 0)
+ gen = 1;
+ for (i = 0; i < sizeof (zfid->zf_gen); i++)
+ zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+#ifdef HAVE_UIO_ZEROCOPY
+/*
+ * The smallest read we may consider to loan out an arcbuf.
+ * This must be a power of 2.
+ */
+int zcr_blksz_min = (1 << 10); /* 1K */
+/*
+ * If set to less than the file block size, allow loaning out of an
+ * arcbuf for a partial block read. This must be a power of 2.
+ */
+int zcr_blksz_max = (1 << 17); /* 128K */
+
+
+/*ARGSUSED*/
+static int
+zfs_reqzcbuf(struct inode *ip, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr)
+{
+ znode_t *zp = ITOZ(ip);
+ zfsvfs_t *zfsvfs = ITOZSB(ip);
+ int max_blksz = zfsvfs->z_max_blksz;
+ uio_t *uio = &xuio->xu_uio;
+ ssize_t size = uio->uio_resid;
+ offset_t offset = uio->uio_loffset;
+ int blksz;
+ int fullblk, i;
+ arc_buf_t *abuf;
+ ssize_t maxsize;
+ int preamble, postamble;
+
+ if (xuio->xu_type != UIOTYPE_ZEROCOPY)
+ return (SET_ERROR(EINVAL));
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ switch (ioflag) {
+ case UIO_WRITE:
+ /*
+ * Loan out an arc_buf for write if write size is bigger than
+ * max_blksz, and the file's block size is also max_blksz.
+ */
+ blksz = max_blksz;
+ if (size < blksz || zp->z_blksz != blksz) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+ /*
+ * Caller requests buffers for write before knowing where the
+ * write offset might be (e.g. NFS TCP write).
+ */
+ if (offset == -1) {
+ preamble = 0;
+ } else {
+ preamble = P2PHASE(offset, blksz);
+ if (preamble) {
+ preamble = blksz - preamble;
+ size -= preamble;
+ }
+ }
+
+ postamble = P2PHASE(size, blksz);
+ size -= postamble;
+
+ fullblk = size / blksz;
+ (void) dmu_xuio_init(xuio,
+ (preamble != 0) + fullblk + (postamble != 0));
+
+ /*
+ * Have to fix iov base/len for partial buffers. They
+ * currently represent full arc_buf's.
+ */
+ if (preamble) {
+ /* data begins in the middle of the arc_buf */
+ abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+ blksz);
+ ASSERT(abuf);
+ (void) dmu_xuio_add(xuio, abuf,
+ blksz - preamble, preamble);
+ }
+
+ for (i = 0; i < fullblk; i++) {
+ abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+ blksz);
+ ASSERT(abuf);
+ (void) dmu_xuio_add(xuio, abuf, 0, blksz);
+ }
+
+ if (postamble) {
+ /* data ends in the middle of the arc_buf */
+ abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+ blksz);
+ ASSERT(abuf);
+ (void) dmu_xuio_add(xuio, abuf, 0, postamble);
+ }
+ break;
+ case UIO_READ:
+ /*
+ * Loan out an arc_buf for read if the read size is larger than
+ * the current file block size. Block alignment is not
+ * considered. Partial arc_buf will be loaned out for read.
+ */
+ blksz = zp->z_blksz;
+ if (blksz < zcr_blksz_min)
+ blksz = zcr_blksz_min;
+ if (blksz > zcr_blksz_max)
+ blksz = zcr_blksz_max;
+ /* avoid potential complexity of dealing with it */
+ if (blksz > max_blksz) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ maxsize = zp->z_size - uio->uio_loffset;
+ if (size > maxsize)
+ size = maxsize;
+
+ if (size < blksz) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+ break;
+ default:
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ uio->uio_extflg = UIO_XUIO;
+ XUIO_XUZC_RW(xuio) = ioflag;
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*ARGSUSED*/
+static int
+zfs_retzcbuf(struct inode *ip, xuio_t *xuio, cred_t *cr)
+{
+ int i;
+ arc_buf_t *abuf;
+ int ioflag = XUIO_XUZC_RW(xuio);
+
+ ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY);
+
+ i = dmu_xuio_cnt(xuio);
+ while (i-- > 0) {
+ abuf = dmu_xuio_arcbuf(xuio, i);
+ /*
+ * if abuf == NULL, it must be a write buffer
+ * that has been returned in zfs_write().
+ */
+ if (abuf)
+ dmu_return_arcbuf(abuf);
+ ASSERT(abuf || ioflag == UIO_WRITE);
+ }
+
+ dmu_xuio_fini(xuio);
+ return (0);
+}
+#endif /* HAVE_UIO_ZEROCOPY */
+
+#if defined(_KERNEL)
+EXPORT_SYMBOL(zfs_open);
+EXPORT_SYMBOL(zfs_close);
+EXPORT_SYMBOL(zfs_access);
+EXPORT_SYMBOL(zfs_lookup);
+EXPORT_SYMBOL(zfs_create);
+EXPORT_SYMBOL(zfs_tmpfile);
+EXPORT_SYMBOL(zfs_remove);
+EXPORT_SYMBOL(zfs_mkdir);
+EXPORT_SYMBOL(zfs_rmdir);
+EXPORT_SYMBOL(zfs_readdir);
+EXPORT_SYMBOL(zfs_getattr_fast);
+EXPORT_SYMBOL(zfs_setattr);
+EXPORT_SYMBOL(zfs_rename);
+EXPORT_SYMBOL(zfs_symlink);
+EXPORT_SYMBOL(zfs_readlink);
+EXPORT_SYMBOL(zfs_link);
+EXPORT_SYMBOL(zfs_inactive);
+EXPORT_SYMBOL(zfs_space);
+EXPORT_SYMBOL(zfs_fid);
+EXPORT_SYMBOL(zfs_getpage);
+EXPORT_SYMBOL(zfs_putpage);
+EXPORT_SYMBOL(zfs_dirty_inode);
+EXPORT_SYMBOL(zfs_map);
+
+/* BEGIN CSTYLED */
+module_param(zfs_delete_blocks, ulong, 0644);
+MODULE_PARM_DESC(zfs_delete_blocks, "Delete files larger than N blocks async");
+/* END CSTYLED */
+
+#endif
dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &blksize, &i_blocks);
spin_lock(&ip->i_lock);
+ ip->i_mode = zp->z_mode;
ip->i_blocks = i_blocks;
i_size_write(ip, zp->z_size);
spin_unlock(&ip->i_lock);
uio.uio_iovcnt = nr_segs;
uio.uio_loffset = *ppos;
uio.uio_segflg = segment;
- uio.uio_limit = MAXOFFSET_T;
uio.uio_resid = count;
uio.uio_skip = skip;
cookie = spl_fstrans_mark();
- error = -zfs_read(ip, &uio, flags, cr);
+ error = -zfs_read(ITOZ(ip), &uio, flags, cr);
spl_fstrans_unmark(cookie);
if (error < 0)
return (error);
uio.uio_iovcnt = nr_segs;
uio.uio_loffset = *ppos;
uio.uio_segflg = segment;
- uio.uio_limit = MAXOFFSET_T;
uio.uio_resid = count;
uio.uio_skip = skip;
cookie = spl_fstrans_mark();
- error = -zfs_write(ip, &uio, flags, cr);
+ error = -zfs_write(ITOZ(ip), &uio, flags, cr);
spl_fstrans_unmark(cookie);
if (error < 0)
return (error);
uio->uio_iovcnt = bio->bi_vcnt - BIO_BI_IDX(bio);
uio->uio_loffset = BIO_BI_SECTOR(bio) << 9;
uio->uio_segflg = UIO_BVEC;
- uio->uio_limit = MAXOFFSET_T;
uio->uio_resid = BIO_BI_SIZE(bio);
uio->uio_skip = BIO_BI_SKIP(bio);
}
$(MODULE)-objs += zfs_replay.o
$(MODULE)-objs += zfs_rlock.o
$(MODULE)-objs += zfs_sa.o
+$(MODULE)-objs += zfs_vnops.o
$(MODULE)-objs += zil.o
$(MODULE)-objs += zio.o
$(MODULE)-objs += zio_checksum.o
--- /dev/null
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
+ * Copyright 2017 Nexenta Systems, Inc.
+ */
+
+/* Portions Copyright 2007 Jeremy Teo */
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/sysmacros.h>
+#include <sys/vfs.h>
+#include <sys/uio.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/kmem.h>
+#include <sys/cmn_err.h>
+#include <sys/errno.h>
+#include <sys/zfs_dir.h>
+#include <sys/zfs_acl.h>
+#include <sys/zfs_ioctl.h>
+#include <sys/fs/zfs.h>
+#include <sys/dmu.h>
+#include <sys/dmu_objset.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/dbuf.h>
+#include <sys/policy.h>
+#include <sys/zfs_vnops.h>
+#include <sys/zfs_quota.h>
+
+
+static ulong_t zfs_fsync_sync_cnt = 4;
+
+int
+zfs_fsync(znode_t *zp, int syncflag, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+
+ (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt);
+
+ if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ zil_commit(zfsvfs->z_log, zp->z_id);
+ ZFS_EXIT(zfsvfs);
+ }
+ tsd_set(zfs_fsyncer_key, NULL);
+
+ return (0);
+}
+
+static unsigned long zfs_vnops_read_chunk_size = 1024 * 1024; /* Tunable */
+
+/*
+ * Read bytes from specified file into supplied buffer.
+ *
+ * IN: zp - inode of file to be read from.
+ * uio - structure supplying read location, range info,
+ * and return buffer.
+ * ioflag - O_SYNC flags; used to provide FRSYNC semantics.
+ * O_DIRECT flag; used to bypass page cache.
+ * cr - credentials of caller.
+ *
+ * OUT: uio - updated offset and range, buffer filled.
+ *
+ * RETURN: 0 on success, error code on failure.
+ *
+ * Side Effects:
+ * inode - atime updated if byte count > 0
+ */
+/* ARGSUSED */
+int
+zfs_read(struct znode *zp, uio_t *uio, int ioflag, cred_t *cr)
+{
+ int error = 0;
+ boolean_t frsync = B_FALSE;
+
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ if (zp->z_pflags & ZFS_AV_QUARANTINED) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EACCES));
+ }
+
+ /* We don't copy out anything useful for directories. */
+ if (Z_ISDIR(ZTOTYPE(zp))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EISDIR));
+ }
+
+ /*
+ * Validate file offset
+ */
+ if (uio->uio_loffset < (offset_t)0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ /*
+ * Fasttrack empty reads
+ */
+ if (uio->uio_resid == 0) {
+ ZFS_EXIT(zfsvfs);
+ return (0);
+ }
+
+#ifdef FRSYNC
+ /*
+ * If we're in FRSYNC mode, sync out this znode before reading it.
+ * Only do this for non-snapshots.
+ *
+ * Some platforms do not support FRSYNC and instead map it
+ * to O_SYNC, which results in unnecessary calls to zil_commit. We
+ * only honor FRSYNC requests on platforms which support it.
+ */
+ frsync = !!(ioflag & FRSYNC);
+#endif
+ if (zfsvfs->z_log &&
+ (frsync || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS))
+ zil_commit(zfsvfs->z_log, zp->z_id);
+
+ /*
+ * Lock the range against changes.
+ */
+ zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock,
+ uio->uio_loffset, uio->uio_resid, RL_READER);
+
+ /*
+ * If we are reading past end-of-file we can skip
+ * to the end; but we might still need to set atime.
+ */
+ if (uio->uio_loffset >= zp->z_size) {
+ error = 0;
+ goto out;
+ }
+
+ ASSERT(uio->uio_loffset < zp->z_size);
+ ssize_t n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset);
+ ssize_t start_resid = n;
+
+ while (n > 0) {
+ ssize_t nbytes = MIN(n, zfs_vnops_read_chunk_size -
+ P2PHASE(uio->uio_loffset, zfs_vnops_read_chunk_size));
+#ifdef UIO_NOCOPY
+ if (uio->uio_segflg == UIO_NOCOPY)
+ error = mappedread_sf(zp, nbytes, uio);
+ else
+#endif
+ if (zn_has_cached_data(zp) && !(ioflag & O_DIRECT)) {
+ error = mappedread(zp, nbytes, uio);
+ } else {
+ error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+ uio, nbytes);
+ }
+
+ if (error) {
+ /* convert checksum errors into IO errors */
+ if (error == ECKSUM)
+ error = SET_ERROR(EIO);
+ break;
+ }
+
+ n -= nbytes;
+ }
+
+ int64_t nread = start_resid - n;
+ dataset_kstats_update_read_kstats(&zfsvfs->z_kstat, nread);
+ task_io_account_read(nread);
+out:
+ zfs_rangelock_exit(lr);
+
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+/*
+ * Write the bytes to a file.
+ *
+ * IN: zp - znode of file to be written to.
+ * uio - structure supplying write location, range info,
+ * and data buffer.
+ * ioflag - O_APPEND flag set if in append mode.
+ * O_DIRECT flag; used to bypass page cache.
+ * cr - credentials of caller.
+ *
+ * OUT: uio - updated offset and range.
+ *
+ * RETURN: 0 if success
+ * error code if failure
+ *
+ * Timestamps:
+ * ip - ctime|mtime updated if byte count > 0
+ */
+
+/* ARGSUSED */
+int
+zfs_write(znode_t *zp, uio_t *uio, int ioflag, cred_t *cr)
+{
+ int error = 0;
+ ssize_t start_resid = uio->uio_resid;
+
+ /*
+ * Fasttrack empty write
+ */
+ ssize_t n = start_resid;
+ if (n == 0)
+ return (0);
+
+ rlim64_t limit = MAXOFFSET_T;
+
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ sa_bulk_attr_t bulk[4];
+ int count = 0;
+ uint64_t mtime[2], ctime[2];
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL,
+ &zp->z_size, 8);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL,
+ &zp->z_pflags, 8);
+
+ /*
+ * Callers might not be able to detect properly that we are read-only,
+ * so check it explicitly here.
+ */
+ if (zfs_is_readonly(zfsvfs)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EROFS));
+ }
+
+ /*
+ * If immutable or not appending then return EPERM
+ */
+ if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) ||
+ ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & O_APPEND) &&
+ (uio->uio_loffset < zp->z_size))) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EPERM));
+ }
+
+ /*
+ * Validate file offset
+ */
+ offset_t woff = ioflag & O_APPEND ? zp->z_size : uio->uio_loffset;
+ if (woff < 0) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EINVAL));
+ }
+
+ int max_blksz = zfsvfs->z_max_blksz;
+
+ /*
+ * Pre-fault the pages to ensure slow (eg NFS) pages
+ * don't hold up txg.
+ * Skip this if uio contains loaned arc_buf.
+ */
+ if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EFAULT));
+ }
+
+ /*
+ * If in append mode, set the io offset pointer to eof.
+ */
+ zfs_locked_range_t *lr;
+ if (ioflag & O_APPEND) {
+ /*
+ * Obtain an appending range lock to guarantee file append
+ * semantics. We reset the write offset once we have the lock.
+ */
+ lr = zfs_rangelock_enter(&zp->z_rangelock, 0, n, RL_APPEND);
+ woff = lr->lr_offset;
+ if (lr->lr_length == UINT64_MAX) {
+ /*
+ * We overlocked the file because this write will cause
+ * the file block size to increase.
+ * Note that zp_size cannot change with this lock held.
+ */
+ woff = zp->z_size;
+ }
+ uio->uio_loffset = woff;
+ } else {
+ /*
+ * Note that if the file block size will change as a result of
+ * this write, then this range lock will lock the entire file
+ * so that we can re-write the block safely.
+ */
+ lr = zfs_rangelock_enter(&zp->z_rangelock, woff, n, RL_WRITER);
+ }
+
+ if (zn_rlimit_fsize(zp, uio, uio->uio_td)) {
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (EFBIG);
+ }
+
+ if (woff >= limit) {
+ zfs_rangelock_exit(lr);
+ ZFS_EXIT(zfsvfs);
+ return (SET_ERROR(EFBIG));
+ }
+
+ if ((woff + n) > limit || woff > (limit - n))
+ n = limit - woff;
+
+ uint64_t end_size = MAX(zp->z_size, woff + n);
+ zilog_t *zilog = zfsvfs->z_log;
+
+ /*
+ * Write the file in reasonable size chunks. Each chunk is written
+ * in a separate transaction; this keeps the intent log records small
+ * and allows us to do more fine-grained space accounting.
+ */
+ while (n > 0) {
+ woff = uio->uio_loffset;
+
+ if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT,
+ KUID_TO_SUID(ZTOUID(zp))) ||
+ zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT,
+ KGID_TO_SGID(ZTOGID(zp))) ||
+ (zp->z_projid != ZFS_DEFAULT_PROJID &&
+ zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT,
+ zp->z_projid))) {
+ error = SET_ERROR(EDQUOT);
+ break;
+ }
+
+ arc_buf_t *abuf = NULL;
+ if (n >= max_blksz && woff >= zp->z_size &&
+ P2PHASE(woff, max_blksz) == 0 &&
+ zp->z_blksz == max_blksz) {
+ /*
+ * This write covers a full block. "Borrow" a buffer
+ * from the dmu so that we can fill it before we enter
+ * a transaction. This avoids the possibility of
+ * holding up the transaction if the data copy hangs
+ * up on a pagefault (e.g., from an NFS server mapping).
+ */
+ size_t cbytes;
+
+ abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl),
+ max_blksz);
+ ASSERT(abuf != NULL);
+ ASSERT(arc_buf_size(abuf) == max_blksz);
+ if ((error = uiocopy(abuf->b_data, max_blksz,
+ UIO_WRITE, uio, &cbytes))) {
+ dmu_return_arcbuf(abuf);
+ break;
+ }
+ ASSERT(cbytes == max_blksz);
+ }
+
+ /*
+ * Start a transaction.
+ */
+ dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
+ dmu_buf_impl_t *db = (dmu_buf_impl_t *)sa_get_db(zp->z_sa_hdl);
+ DB_DNODE_ENTER(db);
+ dmu_tx_hold_write_by_dnode(tx, DB_DNODE(db), woff,
+ MIN(n, max_blksz));
+ DB_DNODE_EXIT(db);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error) {
+ dmu_tx_abort(tx);
+ if (abuf != NULL)
+ dmu_return_arcbuf(abuf);
+ break;
+ }
+
+ /*
+ * If rangelock_enter() over-locked we grow the blocksize
+ * and then reduce the lock range. This will only happen
+ * on the first iteration since rangelock_reduce() will
+ * shrink down lr_length to the appropriate size.
+ */
+ if (lr->lr_length == UINT64_MAX) {
+ uint64_t new_blksz;
+
+ if (zp->z_blksz > max_blksz) {
+ /*
+ * File's blocksize is already larger than the
+ * "recordsize" property. Only let it grow to
+ * the next power of 2.
+ */
+ ASSERT(!ISP2(zp->z_blksz));
+ new_blksz = MIN(end_size,
+ 1 << highbit64(zp->z_blksz));
+ } else {
+ new_blksz = MIN(end_size, max_blksz);
+ }
+ zfs_grow_blocksize(zp, new_blksz, tx);
+ zfs_rangelock_reduce(lr, woff, n);
+ }
+
+ /*
+ * XXX - should we really limit each write to z_max_blksz?
+ * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
+ */
+ ssize_t nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
+
+ ssize_t tx_bytes;
+ if (abuf == NULL) {
+ tx_bytes = uio->uio_resid;
+ uio_fault_disable(uio, B_TRUE);
+ error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
+ uio, nbytes, tx);
+ uio_fault_disable(uio, B_FALSE);
+#ifdef __linux__
+ if (error == EFAULT) {
+ dmu_tx_commit(tx);
+ /*
+ * Account for partial writes before
+ * continuing the loop.
+ * Update needs to occur before the next
+ * uio_prefaultpages, or prefaultpages may
+ * error, and we may break the loop early.
+ */
+ if (tx_bytes != uio->uio_resid)
+ n -= tx_bytes - uio->uio_resid;
+ if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+ break;
+ }
+ continue;
+ }
+#endif
+ if (error != 0) {
+ dmu_tx_commit(tx);
+ break;
+ }
+ tx_bytes -= uio->uio_resid;
+ } else {
+ /*
+ * Is this block ever reached?
+ */
+ tx_bytes = nbytes;
+ /*
+ * If this is not a full block write, but we are
+ * extending the file past EOF and this data starts
+ * block-aligned, use assign_arcbuf(). Otherwise,
+ * write via dmu_write().
+ */
+
+ if (tx_bytes == max_blksz) {
+ error = dmu_assign_arcbuf_by_dbuf(
+ sa_get_db(zp->z_sa_hdl), woff, abuf, tx);
+ if (error != 0) {
+ dmu_return_arcbuf(abuf);
+ dmu_tx_commit(tx);
+ break;
+ }
+ }
+ ASSERT(tx_bytes <= uio->uio_resid);
+ uioskip(uio, tx_bytes);
+ }
+ if (tx_bytes && zn_has_cached_data(zp) &&
+ !(ioflag & O_DIRECT)) {
+ update_pages(zp, woff,
+ tx_bytes, zfsvfs->z_os, zp->z_id);
+ }
+
+ /*
+ * If we made no progress, we're done. If we made even
+ * partial progress, update the znode and ZIL accordingly.
+ */
+ if (tx_bytes == 0) {
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs),
+ (void *)&zp->z_size, sizeof (uint64_t), tx);
+ dmu_tx_commit(tx);
+ ASSERT(error != 0);
+ break;
+ }
+
+ /*
+ * Clear Set-UID/Set-GID bits on successful write if not
+ * privileged and at least one of the execute bits is set.
+ *
+ * It would be nice to do this after all writes have
+ * been done, but that would still expose the ISUID/ISGID
+ * to another app after the partial write is committed.
+ *
+ * Note: we don't call zfs_fuid_map_id() here because
+ * user 0 is not an ephemeral uid.
+ */
+ mutex_enter(&zp->z_acl_lock);
+ uint32_t uid = KUID_TO_SUID(ZTOUID(zp));
+ if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) |
+ (S_IXUSR >> 6))) != 0 &&
+ (zp->z_mode & (S_ISUID | S_ISGID)) != 0 &&
+ secpolicy_vnode_setid_retain(zp, cr,
+ ((zp->z_mode & S_ISUID) != 0 && uid == 0)) != 0) {
+ uint64_t newmode;
+ zp->z_mode &= ~(S_ISUID | S_ISGID);
+ (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs),
+ (void *)&newmode, sizeof (uint64_t), tx);
+ }
+ mutex_exit(&zp->z_acl_lock);
+
+ zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
+
+ /*
+ * Update the file size (zp_size) if it has changed;
+ * account for possible concurrent updates.
+ */
+ while ((end_size = zp->z_size) < uio->uio_loffset) {
+ (void) atomic_cas_64(&zp->z_size, end_size,
+ uio->uio_loffset);
+ ASSERT(error == 0);
+ }
+ /*
+ * If we are replaying and eof is non zero then force
+ * the file size to the specified eof. Note, there's no
+ * concurrency during replay.
+ */
+ if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0)
+ zp->z_size = zfsvfs->z_replay_eof;
+
+ error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+
+ zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag,
+ NULL, NULL);
+ dmu_tx_commit(tx);
+
+ if (error != 0)
+ break;
+ ASSERT(tx_bytes == nbytes);
+ n -= nbytes;
+
+ if (n > 0) {
+ if (uio_prefaultpages(MIN(n, max_blksz), uio)) {
+ error = EFAULT;
+ break;
+ }
+ }
+ }
+
+ zfs_inode_update(zp);
+ zfs_rangelock_exit(lr);
+
+ /*
+ * If we're in replay mode, or we made no progress, return error.
+ * Otherwise, it's at least a partial write, so it's successful.
+ */
+ if (zfsvfs->z_replay || uio->uio_resid == start_resid) {
+ ZFS_EXIT(zfsvfs);
+ return (error);
+ }
+
+ if (ioflag & (O_SYNC | O_DSYNC) ||
+ zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, zp->z_id);
+
+ int64_t nwritten = start_resid - uio->uio_resid;
+ dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, nwritten);
+ task_io_account_write(nwritten);
+
+ ZFS_EXIT(zfsvfs);
+ return (0);
+}
+
+/*ARGSUSED*/
+int
+zfs_getsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ int error;
+ boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+ error = zfs_getacl(zp, vsecp, skipaclchk, cr);
+ ZFS_EXIT(zfsvfs);
+
+ return (error);
+}
+
+/*ARGSUSED*/
+int
+zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
+{
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ int error;
+ boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+ zilog_t *zilog = zfsvfs->z_log;
+
+ ZFS_ENTER(zfsvfs);
+ ZFS_VERIFY_ZP(zp);
+
+ error = zfs_setacl(zp, vsecp, skipaclchk, cr);
+
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
+
+ ZFS_EXIT(zfsvfs);
+ return (error);
+}
+
+EXPORT_SYMBOL(zfs_fsync);
+EXPORT_SYMBOL(zfs_read);
+EXPORT_SYMBOL(zfs_write);
+EXPORT_SYMBOL(zfs_getsecattr);
+EXPORT_SYMBOL(zfs_setsecattr);
+
+ZFS_MODULE_PARAM(zfs_vnops, zfs_vnops_, read_chunk_size, ULONG, ZMOD_RW,
+ "Bytes to read per chunk");
projects / mirror_zfs.git / commitdiff