* 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.
+ * or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2015 by Delphix. 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.
+ * Copyright (c) 2021, 2022 by Pawel Jakub Dawidek
*/
/* 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/vfs_opreg.h>
+#include <sys/uio_impl.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 <vm/pvn.h>
-#include <sys/pathname.h>
#include <sys/cmn_err.h>
#include <sys/errno.h>
-#include <sys/unistd.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/dsl_crypt.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/dbuf.h>
-#include <sys/zap.h>
-#include <sys/sa.h>
-#include <sys/dirent.h>
#include <sys/policy.h>
-#include <sys/sunddi.h>
-#include <sys/sid.h>
-#include <sys/mode.h>
-#include "fs/fs_subr.h"
-#include <sys/zfs_ctldir.h>
-#include <sys/zfs_fuid.h>
-#include <sys/zfs_sa.h>
+#include <sys/zfeature.h>
#include <sys/zfs_vnops.h>
-#include <sys/dnlc.h>
-#include <sys/zfs_rlock.h>
-#include <sys/extdirent.h>
-#include <sys/kidmap.h>
-#include <sys/cred.h>
-#include <sys/attr.h>
-#include <sys/zpl.h>
-#include <sys/zil.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) iput() 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 iput() within a tx then use zfs_iput_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
- * iput(...); // 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
- * iput(...); // release held vnodes
- * zil_commit(zilog, foid); // synchronous when necessary
- * ZFS_EXIT(zfsvfs); // finished in zfs
- * return (error); // done, report error
- */
+#include <sys/zfs_quota.h>
+#include <sys/zfs_vfsops.h>
+#include <sys/zfs_znode.h>
-/*
- * 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)
+zfs_fsync(znode_t *zp, int syncflag, 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));
- }
+ int error = 0;
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
- /* 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));
- }
+ if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) {
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
+ atomic_inc_32(&zp->z_sync_writes_cnt);
+ zil_commit(zfsvfs->z_log, zp->z_id);
+ atomic_dec_32(&zp->z_sync_writes_cnt);
+ zfs_exit(zfsvfs, FTAG);
}
-
- /* 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);
+ return (error);
}
-/* 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)
/*
* data (cmd == SEEK_DATA). "off" is an in/out parameter.
*/
static int
-zfs_holey_common(struct inode *ip, int cmd, loff_t *off)
+zfs_holey_common(znode_t *zp, ulong_t cmd, loff_t *off)
{
- znode_t *zp = ITOZ(ip);
+ zfs_locked_range_t *lr;
uint64_t noff = (uint64_t)*off; /* new offset */
uint64_t file_sz;
int error;
return (SET_ERROR(ENXIO));
}
- if (cmd == SEEK_HOLE)
+ if (cmd == F_SEEK_HOLE)
hole = B_TRUE;
else
hole = B_FALSE;
+ /* Flush any mmap()'d data to disk */
+ if (zn_has_cached_data(zp, 0, file_sz - 1))
+ zn_flush_cached_data(zp, B_FALSE);
+
+ lr = zfs_rangelock_enter(&zp->z_rangelock, 0, UINT64_MAX, RL_READER);
error = dmu_offset_next(ZTOZSB(zp)->z_os, zp->z_id, hole, &noff);
+ zfs_rangelock_exit(lr);
if (error == ESRCH)
return (SET_ERROR(ENXIO));
- /* file was dirty, so fall back to using generic logic */
+ /* File was dirty, so fall back to using generic logic */
if (error == EBUSY) {
if (hole)
*off = file_sz;
}
int
-zfs_holey(struct inode *ip, int cmd, loff_t *off)
+zfs_holey(znode_t *zp, ulong_t cmd, loff_t *off)
{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
int error;
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
- error = zfs_holey_common(ip, cmd, off);
+ error = zfs_holey_common(zp, cmd, off);
- ZFS_EXIT(zfsvfs);
+ zfs_exit(zfsvfs, FTAG);
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)
+int
+zfs_access(znode_t *zp, int mode, int flag, cred_t *cr)
{
- 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));
-
- pb = kmap(pp);
- error = uiomove(pb + off, bytes, UIO_READ, uio);
- kunmap(pp);
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ int error;
- if (mapping_writably_mapped(mp))
- flush_dcache_page(pp);
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
- mark_page_accessed(pp);
- unlock_page(pp);
- put_page(pp);
- } else {
- error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
- uio, bytes);
- }
+ if (flag & V_ACE_MASK)
+#if defined(__linux__)
+ error = zfs_zaccess(zp, mode, flag, B_FALSE, cr,
+ zfs_init_idmap);
+#else
+ error = zfs_zaccess(zp, mode, flag, B_FALSE, cr,
+ NULL);
+#endif
+ else
+#if defined(__linux__)
+ error = zfs_zaccess_rwx(zp, mode, flag, cr, zfs_init_idmap);
+#else
+ error = zfs_zaccess_rwx(zp, mode, flag, cr, NULL);
+#endif
- len -= bytes;
- off = 0;
- if (error)
- break;
- }
+ zfs_exit(zfsvfs, FTAG);
return (error);
}
-#endif /* _KERNEL */
-unsigned long zfs_read_chunk_size = 1024 * 1024; /* Tunable */
-unsigned long zfs_delete_blocks = DMU_MAX_DELETEBLKCNT;
+static uint64_t zfs_vnops_read_chunk_size = 1024 * 1024; /* Tunable */
/*
* Read bytes from specified file into supplied buffer.
*
- * IN: ip - inode of file to be read from.
+ * IN: zp - inode of file to be read from.
* uio - structure supplying read location, range info,
* and return buffer.
- * ioflag - FSYNC flags; used to provide FRSYNC semantics.
+ * ioflag - O_SYNC flags; used to provide FRSYNC semantics.
* O_DIRECT flag; used to bypass page cache.
* cr - credentials of caller.
*
* Side Effects:
* inode - atime updated if byte count > 0
*/
-/* ARGSUSED */
int
-zfs_read(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
+zfs_read(struct znode *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- ssize_t n, nbytes;
- int error = 0;
- rl_t *rl;
-#ifdef HAVE_UIO_ZEROCOPY
- xuio_t *xuio = NULL;
-#endif /* HAVE_UIO_ZEROCOPY */
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
+ (void) cr;
+ int error = 0;
+ boolean_t frsync = B_FALSE;
+
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
if (zp->z_pflags & ZFS_AV_QUARANTINED) {
- ZFS_EXIT(zfsvfs);
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EACCES));
}
+ /* We don't copy out anything useful for directories. */
+ if (Z_ISDIR(ZTOTYPE(zp))) {
+ zfs_exit(zfsvfs, FTAG);
+ return (SET_ERROR(EISDIR));
+ }
+
/*
* Validate file offset
*/
- if (uio->uio_loffset < (offset_t)0) {
- ZFS_EXIT(zfsvfs);
+ if (zfs_uio_offset(uio) < (offset_t)0) {
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EINVAL));
}
/*
* Fasttrack empty reads
*/
- if (uio->uio_resid == 0) {
- ZFS_EXIT(zfsvfs);
+ if (zfs_uio_resid(uio) == 0) {
+ zfs_exit(zfsvfs, FTAG);
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 &&
- (ioflag & FRSYNC || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS))
+ (frsync || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS))
zil_commit(zfsvfs->z_log, zp->z_id);
/*
* Lock the range against changes.
*/
- rl = zfs_range_lock(&zp->z_range_lock, uio->uio_loffset, uio->uio_resid,
- RL_READER);
+ zfs_locked_range_t *lr = zfs_rangelock_enter(&zp->z_rangelock,
+ zfs_uio_offset(uio), zfs_uio_resid(uio), 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) {
+ if (zfs_uio_offset(uio) >= 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);
-
-#ifdef HAVE_UIO_ZEROCOPY
- 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 */
+ ASSERT(zfs_uio_offset(uio) < zp->z_size);
+#if defined(__linux__)
+ ssize_t start_offset = zfs_uio_offset(uio);
+#endif
+ ssize_t n = MIN(zfs_uio_resid(uio), zp->z_size - zfs_uio_offset(uio));
+ ssize_t start_resid = n;
while (n > 0) {
- 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);
+ ssize_t nbytes = MIN(n, zfs_vnops_read_chunk_size -
+ P2PHASE(zfs_uio_offset(uio), zfs_vnops_read_chunk_size));
+#ifdef UIO_NOCOPY
+ if (zfs_uio_segflg(uio) == UIO_NOCOPY)
+ error = mappedread_sf(zp, nbytes, uio);
+ else
+#endif
+ if (zn_has_cached_data(zp, zfs_uio_offset(uio),
+ zfs_uio_offset(uio) + nbytes - 1) && !(ioflag & O_DIRECT)) {
+ error = mappedread(zp, nbytes, uio);
} else {
error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
uio, nbytes);
/* convert checksum errors into IO errors */
if (error == ECKSUM)
error = SET_ERROR(EIO);
+
+#if defined(__linux__)
+ /*
+ * if we actually read some bytes, bubbling EFAULT
+ * up to become EAGAIN isn't what we want here...
+ *
+ * ...on Linux, at least. On FBSD, doing this breaks.
+ */
+ if (error == EFAULT &&
+ (zfs_uio_offset(uio) - start_offset) != 0)
+ error = 0;
+#endif
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_range_unlock(rl);
+ zfs_rangelock_exit(lr);
- ZFS_EXIT(zfsvfs);
+ ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
+ zfs_exit(zfsvfs, FTAG);
return (error);
}
+static void
+zfs_clear_setid_bits_if_necessary(zfsvfs_t *zfsvfs, znode_t *zp, cred_t *cr,
+ uint64_t *clear_setid_bits_txgp, dmu_tx_t *tx)
+{
+ zilog_t *zilog = zfsvfs->z_log;
+ const uint64_t uid = KUID_TO_SUID(ZTOUID(zp));
+
+ ASSERT(clear_setid_bits_txgp != NULL);
+ ASSERT(tx != NULL);
+
+ /*
+ * 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);
+ 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);
+ 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);
+
+ /*
+ * Make sure SUID/SGID bits will be removed when we replay the
+ * log. If the setid bits are keep coming back, don't log more
+ * than one TX_SETATTR per transaction group.
+ */
+ if (*clear_setid_bits_txgp != dmu_tx_get_txg(tx)) {
+ vattr_t va = {0};
+
+ va.va_mask = ATTR_MODE;
+ va.va_nodeid = zp->z_id;
+ va.va_mode = newmode;
+ zfs_log_setattr(zilog, tx, TX_SETATTR, zp, &va,
+ ATTR_MODE, NULL);
+ *clear_setid_bits_txgp = dmu_tx_get_txg(tx);
+ }
+ } else {
+ mutex_exit(&zp->z_acl_lock);
+ }
+}
+
/*
* Write the bytes to a file.
*
- * IN: ip - inode of file to be written to.
+ * IN: zp - znode of file to be written to.
* uio - structure supplying write location, range info,
* and data buffer.
- * ioflag - FAPPEND flag set if in append mode.
+ * ioflag - O_APPEND flag set if in append mode.
* O_DIRECT flag; used to bypass page cache.
* cr - credentials of caller.
*
* Timestamps:
* ip - ctime|mtime updated if byte count > 0
*/
-
-/* ARGSUSED */
int
-zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
+zfs_write(znode_t *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
{
- znode_t *zp = ITOZ(ip);
- rlim64_t limit = uio->uio_limit;
- ssize_t start_resid = uio->uio_resid;
- ssize_t tx_bytes;
- uint64_t end_size;
- dmu_tx_t *tx;
- zfsvfs_t *zfsvfs = ZTOZSB(zp);
- zilog_t *zilog;
- offset_t woff;
- ssize_t n, nbytes;
- rl_t *rl;
- int max_blksz = zfsvfs->z_max_blksz;
- int error = 0;
- arc_buf_t *abuf;
- const iovec_t *aiov = NULL;
- xuio_t *xuio = NULL;
- int write_eof;
- int count = 0;
- sa_bulk_attr_t bulk[4];
- uint64_t mtime[2], ctime[2];
- uint32_t uid;
-#ifdef HAVE_UIO_ZEROCOPY
- int i_iov = 0;
- const iovec_t *iovp = uio->uio_iov;
- ASSERTV(int iovcnt = uio->uio_iovcnt);
-#endif
+ int error = 0, error1;
+ ssize_t start_resid = zfs_uio_resid(uio);
+ uint64_t clear_setid_bits_txg = 0;
/*
* Fasttrack empty write
*/
- n = start_resid;
+ ssize_t 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);
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
+ 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,
* so check it explicitly here.
*/
if (zfs_is_readonly(zfsvfs)) {
- ZFS_EXIT(zfsvfs);
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EROFS));
}
/*
- * If immutable or not appending then return EPERM
+ * If immutable or not appending then return EPERM.
+ * Intentionally allow ZFS_READONLY through here.
+ * See zfs_zaccess_common()
*/
- if ((zp->z_pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) ||
- ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) &&
- (uio->uio_loffset < zp->z_size))) {
- ZFS_EXIT(zfsvfs);
+ if ((zp->z_pflags & ZFS_IMMUTABLE) ||
+ ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & O_APPEND) &&
+ (zfs_uio_offset(uio) < zp->z_size))) {
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EPERM));
}
- zilog = zfsvfs->z_log;
-
/*
* Validate file offset
*/
- woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset;
+ offset_t woff = ioflag & O_APPEND ? zp->z_size : zfs_uio_offset(uio);
if (woff < 0) {
- ZFS_EXIT(zfsvfs);
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EINVAL));
}
/*
* 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
- uio_prefaultpages(MIN(n, max_blksz), uio);
+ ssize_t pfbytes = MIN(n, DMU_MAX_ACCESS >> 1);
+ if (zfs_uio_prefaultpages(pfbytes, uio)) {
+ zfs_exit(zfsvfs, FTAG);
+ return (SET_ERROR(EFAULT));
+ }
/*
* If in append mode, set the io offset pointer to eof.
*/
- if (ioflag & FAPPEND) {
+ 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.
*/
- rl = zfs_range_lock(&zp->z_range_lock, 0, n, RL_APPEND);
- woff = rl->r_off;
- if (rl->r_len == UINT64_MAX) {
+ 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.
*/
woff = zp->z_size;
}
- uio->uio_loffset = woff;
+ zfs_uio_setoffset(uio, 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.
*/
- rl = zfs_range_lock(&zp->z_range_lock, woff, n, RL_WRITER);
+ lr = zfs_rangelock_enter(&zp->z_rangelock, woff, n, RL_WRITER);
+ }
+
+ if (zn_rlimit_fsize_uio(zp, uio)) {
+ zfs_rangelock_exit(lr);
+ zfs_exit(zfsvfs, FTAG);
+ return (SET_ERROR(EFBIG));
}
+ const rlim64_t limit = MAXOFFSET_T;
+
if (woff >= limit) {
- zfs_range_unlock(rl);
- ZFS_EXIT(zfsvfs);
+ zfs_rangelock_exit(lr);
+ zfs_exit(zfsvfs, FTAG);
return (SET_ERROR(EFBIG));
}
- if ((woff + n) > limit || woff > (limit - n))
+ if (n > limit - woff)
n = limit - woff;
- /* Will this write extend the file length? */
- write_eof = (woff + n > zp->z_size);
+ uint64_t end_size = MAX(zp->z_size, woff + n);
+ zilog_t *zilog = zfsvfs->z_log;
+ boolean_t commit = (ioflag & (O_SYNC | O_DSYNC)) ||
+ (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS);
- end_size = MAX(zp->z_size, woff + n);
+ const uint64_t uid = KUID_TO_SUID(ZTOUID(zp));
+ const uint64_t gid = KGID_TO_SGID(ZTOGID(zp));
+ const uint64_t projid = zp->z_projid;
/*
* Write the file in reasonable size chunks. Each chunk is written
* and allows us to do more fine-grained space accounting.
*/
while (n > 0) {
- abuf = NULL;
- woff = uio->uio_loffset;
- if (zfs_owner_overquota(zfsvfs, zp, B_FALSE) ||
- zfs_owner_overquota(zfsvfs, zp, B_TRUE)) {
- if (abuf != NULL)
- dmu_return_arcbuf(abuf);
+ woff = zfs_uio_offset(uio);
+
+ 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;
}
- if (xuio && abuf == NULL) {
-#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 (abuf == NULL && n >= max_blksz &&
- woff >= zp->z_size &&
- P2PHASE(woff, max_blksz) == 0 &&
- zp->z_blksz == max_blksz) {
+ uint64_t blksz;
+ if (lr->lr_length == UINT64_MAX && zp->z_size <= zp->z_blksz) {
+ if (zp->z_blksz > zfsvfs->z_max_blksz &&
+ !ISP2(zp->z_blksz)) {
+ /*
+ * File's blocksize is already larger than the
+ * "recordsize" property. Only let it grow to
+ * the next power of 2.
+ */
+ blksz = 1 << highbit64(zp->z_blksz);
+ } else {
+ blksz = zfsvfs->z_max_blksz;
+ }
+ blksz = MIN(blksz, P2ROUNDUP(end_size,
+ SPA_MINBLOCKSIZE));
+ blksz = MAX(blksz, zp->z_blksz);
+ } else {
+ blksz = zp->z_blksz;
+ }
+
+ arc_buf_t *abuf = NULL;
+ ssize_t nbytes = n;
+ if (n >= blksz && woff >= zp->z_size &&
+ P2PHASE(woff, blksz) == 0 &&
+ (blksz >= SPA_OLD_MAXBLOCKSIZE || n < 4 * blksz)) {
/*
* This write covers a full block. "Borrow" a buffer
* from the dmu so that we can fill it before we enter
* 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);
+ blksz);
ASSERT(abuf != NULL);
- ASSERT(arc_buf_size(abuf) == max_blksz);
- if ((error = uiocopy(abuf->b_data, max_blksz,
- UIO_WRITE, uio, &cbytes))) {
+ ASSERT(arc_buf_size(abuf) == blksz);
+ if ((error = zfs_uiocopy(abuf->b_data, blksz,
+ UIO_WRITE, uio, &nbytes))) {
dmu_return_arcbuf(abuf);
break;
}
- ASSERT(cbytes == max_blksz);
+ ASSERT3S(nbytes, ==, blksz);
+ } else {
+ nbytes = MIN(n, (DMU_MAX_ACCESS >> 1) -
+ P2PHASE(woff, blksz));
+ if (pfbytes < nbytes) {
+ if (zfs_uio_prefaultpages(nbytes, uio)) {
+ error = SET_ERROR(EFAULT);
+ break;
+ }
+ pfbytes = nbytes;
+ }
}
/*
* Start a transaction.
*/
- tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
- dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz));
+ 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, nbytes);
+ DB_DNODE_EXIT(db);
zfs_sa_upgrade_txholds(tx, zp);
error = dmu_tx_assign(tx, TXG_WAIT);
if (error) {
}
/*
- * 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.
+ * NB: We must call zfs_clear_setid_bits_if_necessary before
+ * committing the transaction!
*/
- if (rl->r_len == 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_range_reduce(rl, woff, n);
- }
/*
- * XXX - should we really limit each write to z_max_blksz?
- * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
+ * 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.
*/
- nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
+ if (lr->lr_length == UINT64_MAX) {
+ zfs_grow_blocksize(zp, blksz, tx);
+ zfs_rangelock_reduce(lr, woff, n);
+ }
+ ssize_t tx_bytes;
if (abuf == NULL) {
- tx_bytes = uio->uio_resid;
+ tx_bytes = zfs_uio_resid(uio);
+ zfs_uio_fault_disable(uio, B_TRUE);
error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl),
uio, nbytes, tx);
- tx_bytes -= uio->uio_resid;
+ zfs_uio_fault_disable(uio, B_FALSE);
+#ifdef __linux__
+ if (error == EFAULT) {
+ zfs_clear_setid_bits_if_necessary(zfsvfs, zp,
+ cr, &clear_setid_bits_txg, tx);
+ dmu_tx_commit(tx);
+ /*
+ * Account for partial writes before
+ * continuing the loop.
+ * Update needs to occur before the next
+ * zfs_uio_prefaultpages, or prefaultpages may
+ * error, and we may break the loop early.
+ */
+ n -= tx_bytes - zfs_uio_resid(uio);
+ pfbytes -= tx_bytes - zfs_uio_resid(uio);
+ continue;
+ }
+#endif
+ /*
+ * On FreeBSD, EFAULT should be propagated back to the
+ * VFS, which will handle faulting and will retry.
+ */
+ if (error != 0 && error != EFAULT) {
+ zfs_clear_setid_bits_if_necessary(zfsvfs, zp,
+ cr, &clear_setid_bits_txg, tx);
+ dmu_tx_commit(tx);
+ break;
+ }
+ tx_bytes -= zfs_uio_resid(uio);
} 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().
+ * Thus, we're writing a full block at a block-aligned
+ * offset and extending the file past EOF.
+ *
+ * dmu_assign_arcbuf_by_dbuf() will directly assign the
+ * arc buffer to a dbuf.
*/
- 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);
+ error = dmu_assign_arcbuf_by_dbuf(
+ sa_get_db(zp->z_sa_hdl), woff, abuf, tx);
+ if (error != 0) {
+ /*
+ * XXX This might not be necessary if
+ * dmu_assign_arcbuf_by_dbuf is guaranteed
+ * to be atomic.
+ */
+ zfs_clear_setid_bits_if_necessary(zfsvfs, zp,
+ cr, &clear_setid_bits_txg, tx);
dmu_return_arcbuf(abuf);
- xuio_stat_wbuf_copied();
- } else {
- ASSERT(xuio || tx_bytes == max_blksz);
- dmu_assign_arcbuf_by_dbuf(
- sa_get_db(zp->z_sa_hdl), woff, abuf, tx);
+ dmu_tx_commit(tx);
+ break;
}
- ASSERT(tx_bytes <= uio->uio_resid);
- uioskip(uio, tx_bytes);
+ ASSERT3S(nbytes, <=, zfs_uio_resid(uio));
+ zfs_uioskip(uio, nbytes);
+ tx_bytes = nbytes;
}
- if (tx_bytes && zp->z_is_mapped && !(ioflag & O_DIRECT)) {
- update_pages(ip, woff,
- tx_bytes, zfsvfs->z_os, zp->z_id);
+ if (tx_bytes &&
+ zn_has_cached_data(zp, woff, woff + tx_bytes - 1) &&
+ !(ioflag & O_DIRECT)) {
+ update_pages(zp, woff, tx_bytes, zfsvfs->z_os);
}
/*
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);
- 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_clear_setid_bits_if_necessary(zfsvfs, zp, cr,
+ &clear_setid_bits_txg, tx);
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) {
+ while ((end_size = zp->z_size) < zfs_uio_offset(uio)) {
(void) atomic_cas_64(&zp->z_size, end_size,
- uio->uio_loffset);
- ASSERT(error == 0);
+ zfs_uio_offset(uio));
+ ASSERT(error == 0 || error == EFAULT);
}
/*
* If we are replaying and eof is non zero then force
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);
+ error1 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
+ if (error1 != 0)
+ /* Avoid clobbering EFAULT. */
+ error = error1;
- zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag,
+ /*
+ * NB: During replay, the TX_SETATTR record logged by
+ * zfs_clear_setid_bits_if_necessary must precede any of
+ * the TX_WRITE records logged here.
+ */
+ zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, commit,
NULL, NULL);
+
dmu_tx_commit(tx);
if (error != 0)
break;
- ASSERT(tx_bytes == nbytes);
+ ASSERT3S(tx_bytes, ==, nbytes);
n -= nbytes;
-
- if (!xuio && n > 0)
- uio_prefaultpages(MIN(n, max_blksz), uio);
+ pfbytes -= nbytes;
}
- zfs_inode_update(zp);
- zfs_range_unlock(rl);
+ zfs_znode_update_vfs(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 we're in replay mode, or we made no progress, or the
+ * uio data is inaccessible return an 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);
+ if (zfsvfs->z_replay || zfs_uio_resid(uio) == start_resid ||
+ error == EFAULT) {
+ zfs_exit(zfsvfs, FTAG);
return (error);
}
- if (ioflag & (FSYNC | FDSYNC) ||
- zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ if (commit)
zil_commit(zilog, zp->z_id);
- ZFS_EXIT(zfsvfs);
+ const int64_t nwritten = start_resid - zfs_uio_resid(uio);
+ dataset_kstats_update_write_kstats(&zfsvfs->z_kstat, nwritten);
+ task_io_account_write(nwritten);
+
+ zfs_exit(zfsvfs, FTAG);
return (0);
}
-/*
- * 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_iput_async(struct inode *ip)
+int
+zfs_getsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
{
- objset_t *os = ITOZSB(ip)->z_os;
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ int error;
+ boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
- ASSERT(atomic_read(&ip->i_count) > 0);
- ASSERT(os != NULL);
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
+ error = zfs_getacl(zp, vsecp, skipaclchk, cr);
+ zfs_exit(zfsvfs, FTAG);
- if (atomic_read(&ip->i_count) == 1)
- VERIFY(taskq_dispatch(dsl_pool_iput_taskq(dmu_objset_pool(os)),
- (task_func_t *)iput, ip, TQ_SLEEP) != TASKQID_INVALID);
- else
- iput(ip);
+ return (error);
}
-void
-zfs_get_done(zgd_t *zgd, int error)
+int
+zfs_setsecattr(znode_t *zp, vsecattr_t *vsecp, int flag, cred_t *cr)
{
- znode_t *zp = zgd->zgd_private;
-
- if (zgd->zgd_db)
- dmu_buf_rele(zgd->zgd_db, zgd);
-
- zfs_range_unlock(zgd->zgd_rl);
+ zfsvfs_t *zfsvfs = ZTOZSB(zp);
+ int error;
+ boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
+ zilog_t *zilog;
- /*
- * Release the vnode asynchronously as we currently have the
- * txg stopped from syncing.
- */
- zfs_iput_async(ZTOI(zp));
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
+ zilog = zfsvfs->z_log;
+ error = zfs_setacl(zp, vsecp, skipaclchk, cr);
- if (error == 0 && zgd->zgd_bp)
- zil_lwb_add_block(zgd->zgd_lwb, zgd->zgd_bp);
+ if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
+ zil_commit(zilog, 0);
- kmem_free(zgd, sizeof (zgd_t));
+ zfs_exit(zfsvfs, FTAG);
+ return (error);
}
-#ifdef DEBUG
+#ifdef ZFS_DEBUG
static int zil_fault_io = 0;
#endif
+static void zfs_get_done(zgd_t *zgd, int error);
+
/*
* 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)
+zfs_get_data(void *arg, uint64_t gen, lr_write_t *lr, char *buf,
+ struct lwb *lwb, zio_t *zio)
{
zfsvfs_t *zfsvfs = arg;
objset_t *os = zfsvfs->z_os;
dmu_buf_t *db;
zgd_t *zgd;
int error = 0;
+ uint64_t zp_gen;
ASSERT3P(lwb, !=, NULL);
- ASSERT3P(zio, !=, NULL);
ASSERT3U(size, !=, 0);
/*
* Release the vnode asynchronously as we currently have the
* txg stopped from syncing.
*/
- zfs_iput_async(ZTOI(zp));
+ zfs_zrele_async(zp);
+ return (SET_ERROR(ENOENT));
+ }
+ /* check if generation number matches */
+ if (sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen,
+ sizeof (zp_gen)) != 0) {
+ zfs_zrele_async(zp);
+ return (SET_ERROR(EIO));
+ }
+ if (zp_gen != gen) {
+ zfs_zrele_async(zp);
return (SET_ERROR(ENOENT));
}
- zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
+ zgd = kmem_zalloc(sizeof (zgd_t), KM_SLEEP);
zgd->zgd_lwb = lwb;
zgd->zgd_private = zp;
* we don't have to write the data twice.
*/
if (buf != NULL) { /* immediate write */
- zgd->zgd_rl = zfs_range_lock(&zp->z_range_lock, offset, size,
- RL_READER);
+ 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);
}
ASSERT(error == 0 || error == ENOENT);
} else { /* indirect write */
+ ASSERT3P(zio, !=, NULL);
/*
* Have to lock the whole block to ensure when it's
* written out and its checksum is being calculated
size = zp->z_blksz;
blkoff = ISP2(size) ? P2PHASE(offset, size) : offset;
offset -= blkoff;
- zgd->zgd_rl = zfs_range_lock(&zp->z_range_lock, offset,
- size, RL_READER);
+ zgd->zgd_lr = zfs_rangelock_enter(&zp->z_rangelock,
+ offset, size, RL_READER);
if (zp->z_blksz == size)
break;
offset += blkoff;
- zfs_range_unlock(zgd->zgd_rl);
+ 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 DEBUG
+#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);
+ error = dmu_buf_hold_noread(os, object, offset, zgd,
+ &db);
if (error == 0) {
blkptr_t *bp = &lr->lr_blkptr;
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;
}
}
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);
+static void
+zfs_get_done(zgd_t *zgd, int error)
+{
+ (void) error;
+ znode_t *zp = zgd->zgd_private;
- if (flag & V_ACE_MASK)
- error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
- else
- error = zfs_zaccess_rwx(zp, mode, flag, cr);
+ if (zgd->zgd_db)
+ dmu_buf_rele(zgd->zgd_db, zgd);
- 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: dip - inode 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: ipp - inode of located entry, NULL if not found.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * NA
- */
-/* ARGSUSED */
-int
-zfs_lookup(struct inode *dip, char *nm, struct inode **ipp, int flags,
- cred_t *cr, int *direntflags, pathname_t *realpnp)
-{
- znode_t *zdp = ITOZ(dip);
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- int error = 0;
+ zfs_rangelock_exit(zgd->zgd_lr);
/*
- * 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.
+ * Release the vnode asynchronously as we currently have the
+ * txg stopped from syncing.
*/
- if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) {
+ zfs_zrele_async(zp);
- if (!S_ISDIR(dip->i_mode)) {
- return (SET_ERROR(ENOTDIR));
- } else if (zdp->z_sa_hdl == NULL) {
- return (SET_ERROR(EIO));
- }
+ kmem_free(zgd, sizeof (zgd_t));
+}
- if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) {
- error = zfs_fastaccesschk_execute(zdp, cr);
- if (!error) {
- *ipp = dip;
- igrab(*ipp);
- return (0);
- }
- return (error);
-#ifdef HAVE_DNLC
- } else if (!zdp->z_zfsvfs->z_norm &&
- (zdp->z_zfsvfs->z_case == ZFS_CASE_SENSITIVE)) {
+static int
+zfs_enter_two(zfsvfs_t *zfsvfs1, zfsvfs_t *zfsvfs2, const char *tag)
+{
+ int error;
- vnode_t *tvp = dnlc_lookup(dvp, nm);
+ /* Swap. Not sure if the order of zfs_enter()s is important. */
+ if (zfsvfs1 > zfsvfs2) {
+ zfsvfs_t *tmpzfsvfs;
- if (tvp) {
- error = zfs_fastaccesschk_execute(zdp, cr);
- if (error) {
- iput(tvp);
- return (error);
- }
- if (tvp == DNLC_NO_VNODE) {
- iput(tvp);
- return (SET_ERROR(ENOENT));
- } else {
- *vpp = tvp;
- return (specvp_check(vpp, cr));
- }
- }
-#endif /* HAVE_DNLC */
+ tmpzfsvfs = zfsvfs2;
+ zfsvfs2 = zfsvfs1;
+ zfsvfs1 = tmpzfsvfs;
+ }
+
+ error = zfs_enter(zfsvfs1, tag);
+ if (error != 0)
+ return (error);
+ if (zfsvfs1 != zfsvfs2) {
+ error = zfs_enter(zfsvfs2, tag);
+ if (error != 0) {
+ zfs_exit(zfsvfs1, tag);
+ return (error);
}
}
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zdp);
+ return (0);
+}
- *ipp = NULL;
+static void
+zfs_exit_two(zfsvfs_t *zfsvfs1, zfsvfs_t *zfsvfs2, const char *tag)
+{
- 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));
- }
+ zfs_exit(zfsvfs1, tag);
+ if (zfsvfs1 != zfsvfs2)
+ zfs_exit(zfsvfs2, tag);
+}
- if ((error = zfs_get_xattrdir(zdp, ipp, cr, flags))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
+/*
+ * We split each clone request in chunks that can fit into a single ZIL
+ * log entry. Each ZIL log entry can fit 130816 bytes for a block cloning
+ * operation (see zil_max_log_data() and zfs_log_clone_range()). This gives
+ * us room for storing 1022 block pointers.
+ *
+ * On success, the function return the number of bytes copied in *lenp.
+ * Note, it doesn't return how much bytes are left to be copied.
+ * On errors which are caused by any file system limitations or
+ * brt limitations `EINVAL` is returned. In the most cases a user
+ * requested bad parameters, it could be possible to clone the file but
+ * some parameters don't match the requirements.
+ */
+int
+zfs_clone_range(znode_t *inzp, uint64_t *inoffp, znode_t *outzp,
+ uint64_t *outoffp, uint64_t *lenp, cred_t *cr)
+{
+ zfsvfs_t *inzfsvfs, *outzfsvfs;
+ objset_t *inos, *outos;
+ zfs_locked_range_t *inlr, *outlr;
+ dmu_buf_impl_t *db;
+ dmu_tx_t *tx;
+ zilog_t *zilog;
+ uint64_t inoff, outoff, len, done;
+ uint64_t outsize, size;
+ int error;
+ int count = 0;
+ sa_bulk_attr_t bulk[3];
+ uint64_t mtime[2], ctime[2];
+ uint64_t uid, gid, projid;
+ blkptr_t *bps;
+ size_t maxblocks, nbps;
+ uint_t inblksz;
+ uint64_t clear_setid_bits_txg = 0;
- /*
- * Do we have permission to get into attribute directory?
- */
+ inoff = *inoffp;
+ outoff = *outoffp;
+ len = *lenp;
+ done = 0;
- if ((error = zfs_zaccess(ITOZ(*ipp), ACE_EXECUTE, 0,
- B_FALSE, cr))) {
- iput(*ipp);
- *ipp = NULL;
- }
+ inzfsvfs = ZTOZSB(inzp);
+ outzfsvfs = ZTOZSB(outzp);
- ZFS_EXIT(zfsvfs);
+ /*
+ * We need to call zfs_enter() potentially on two different datasets,
+ * so we need a dedicated function for that.
+ */
+ error = zfs_enter_two(inzfsvfs, outzfsvfs, FTAG);
+ if (error != 0)
return (error);
- }
- if (!S_ISDIR(dip->i_mode)) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(ENOTDIR));
+ inos = inzfsvfs->z_os;
+ outos = outzfsvfs->z_os;
+
+ /*
+ * Both source and destination have to belong to the same storage pool.
+ */
+ if (dmu_objset_spa(inos) != dmu_objset_spa(outos)) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EXDEV));
}
/*
- * Check accessibility of directory.
+ * outos and inos belongs to the same storage pool.
+ * see a few lines above, only one check.
*/
+ if (!spa_feature_is_enabled(dmu_objset_spa(outos),
+ SPA_FEATURE_BLOCK_CLONING)) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EOPNOTSUPP));
+ }
- if ((error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr))) {
- ZFS_EXIT(zfsvfs);
- return (error);
+ ASSERT(!outzfsvfs->z_replay);
+
+ /*
+ * Block cloning from an unencrypted dataset into an encrypted
+ * dataset and vice versa is not supported.
+ */
+ if (inos->os_encrypted != outos->os_encrypted) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EXDEV));
}
- if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
+ /*
+ * Cloning across encrypted datasets is possible only if they
+ * share the same master key.
+ */
+ if (inos != outos && inos->os_encrypted &&
+ !dmu_objset_crypto_key_equal(inos, outos)) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EXDEV));
}
- error = zfs_dirlook(zdp, nm, ipp, flags, direntflags, realpnp);
- if ((error == 0) && (*ipp))
- zfs_inode_update(ITOZ(*ipp));
+ error = zfs_verify_zp(inzp);
+ if (error == 0)
+ error = zfs_verify_zp(outzp);
+ if (error != 0) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (error);
+ }
- ZFS_EXIT(zfsvfs);
- return (error);
-}
+ /*
+ * We don't copy source file's flags that's why we don't allow to clone
+ * files that are in quarantine.
+ */
+ if (inzp->z_pflags & ZFS_AV_QUARANTINED) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EACCES));
+ }
-/*
- * 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: dip - inode 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].
- * vsecp - ACL to be set
- *
- * OUT: ipp - inode of created or trunc'd entry.
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dip - ctime|mtime updated if new entry created
- * ip - ctime|mtime always, atime if new
- */
+ if (inoff >= inzp->z_size) {
+ *lenp = 0;
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (0);
+ }
+ if (len > inzp->z_size - inoff) {
+ len = inzp->z_size - inoff;
+ }
+ if (len == 0) {
+ *lenp = 0;
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (0);
+ }
-/* ARGSUSED */
-int
-zfs_create(struct inode *dip, char *name, vattr_t *vap, int excl,
- int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp)
-{
- znode_t *zp, *dzp = ITOZ(dip);
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- 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;
+ /*
+ * Callers might not be able to detect properly that we are read-only,
+ * so check it explicitly here.
+ */
+ if (zfs_is_readonly(outzfsvfs)) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EROFS));
+ }
/*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
+ * If immutable or not appending then return EPERM.
+ * Intentionally allow ZFS_READONLY through here.
+ * See zfs_zaccess_common()
*/
+ if ((outzp->z_pflags & ZFS_IMMUTABLE) != 0) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EPERM));
+ }
- gid = crgetgid(cr);
- uid = crgetuid(cr);
+ /*
+ * No overlapping if we are cloning within the same file.
+ */
+ if (inzp == outzp) {
+ if (inoff < outoff + len && outoff < inoff + len) {
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
+ return (SET_ERROR(EINVAL));
+ }
+ }
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
+ /*
+ * Maintain predictable lock order.
+ */
+ if (inzp < outzp || (inzp == outzp && inoff < outoff)) {
+ inlr = zfs_rangelock_enter(&inzp->z_rangelock, inoff, len,
+ RL_READER);
+ outlr = zfs_rangelock_enter(&outzp->z_rangelock, outoff, len,
+ RL_WRITER);
+ } else {
+ outlr = zfs_rangelock_enter(&outzp->z_rangelock, outoff, len,
+ RL_WRITER);
+ inlr = zfs_rangelock_enter(&inzp->z_rangelock, inoff, len,
+ RL_READER);
+ }
- if (name == NULL)
- return (SET_ERROR(EINVAL));
+ inblksz = inzp->z_blksz;
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- os = zfsvfs->z_os;
- zilog = zfsvfs->z_log;
+ /*
+ * We cannot clone into a file with different block size if we can't
+ * grow it (block size is already bigger, has more than one block, or
+ * not locked for growth). There are other possible reasons for the
+ * grow to fail, but we cover what we can before opening transaction
+ * and the rest detect after we try to do it.
+ */
+ if (inblksz < outzp->z_blksz) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
+ }
+ if (inblksz != outzp->z_blksz && (outzp->z_size > outzp->z_blksz ||
+ outlr->lr_length != UINT64_MAX)) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
+ }
- if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
- NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EILSEQ));
+ /*
+ * Block size must be power-of-2 if destination offset != 0.
+ * There can be no multiple blocks of non-power-of-2 size.
+ */
+ if (outoff != 0 && !ISP2(inblksz)) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
}
- 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);
- }
+ /*
+ * Offsets and len must be at block boundries.
+ */
+ if ((inoff % inblksz) != 0 || (outoff % inblksz) != 0) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
+ }
+ /*
+ * Length must be multipe of blksz, except for the end of the file.
+ */
+ if ((len % inblksz) != 0 &&
+ (len < inzp->z_size - inoff || len < outzp->z_size - outoff)) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
}
-top:
- *ipp = NULL;
- if (*name == '\0') {
- /*
- * Null component name refers to the directory itself.
- */
- igrab(dip);
- zp = dzp;
- dl = NULL;
- error = 0;
- } else {
- /* possible igrab(zp) */
- int zflg = 0;
+ /*
+ * If we are copying only one block and it is smaller than recordsize
+ * property, do not allow destination to grow beyond one block if it
+ * is not there yet. Otherwise the destination will get stuck with
+ * that block size forever, that can be as small as 512 bytes, no
+ * matter how big the destination grow later.
+ */
+ if (len <= inblksz && inblksz < outzfsvfs->z_max_blksz &&
+ outzp->z_size <= inblksz && outoff + len > inblksz) {
+ error = SET_ERROR(EINVAL);
+ goto unlock;
+ }
- if (flag & FIGNORECASE)
- zflg |= ZCILOOK;
+ error = zn_rlimit_fsize(outoff + len);
+ if (error != 0) {
+ goto unlock;
+ }
- 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 (inoff >= MAXOFFSET_T || outoff >= MAXOFFSET_T) {
+ error = SET_ERROR(EFBIG);
+ goto unlock;
}
- if (zp == NULL) {
- uint64_t txtype;
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(outzfsvfs), NULL,
+ &mtime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(outzfsvfs), NULL,
+ &ctime, 16);
+ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(outzfsvfs), NULL,
+ &outzp->z_size, 8);
- /*
- * 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;
- }
+ zilog = outzfsvfs->z_log;
+ maxblocks = zil_max_log_data(zilog, sizeof (lr_clone_range_t)) /
+ sizeof (bps[0]);
- /*
- * We only support the creation of regular files in
- * extended attribute directories.
- */
+ uid = KUID_TO_SUID(ZTOUID(outzp));
+ gid = KGID_TO_SGID(ZTOGID(outzp));
+ projid = outzp->z_projid;
- 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;
- }
+ bps = vmem_alloc(sizeof (bps[0]) * maxblocks, KM_SLEEP);
- if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
- cr, vsecp, &acl_ids)) != 0)
- goto out;
- have_acl = B_TRUE;
+ /*
+ * Clone the file in reasonable size chunks. Each chunk is cloned
+ * in a separate transaction; this keeps the intent log records small
+ * and allows us to do more fine-grained space accounting.
+ */
+ while (len > 0) {
+ size = MIN(inblksz * maxblocks, len);
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
- zfs_acl_ids_free(&acl_ids);
+ if (zfs_id_overblockquota(outzfsvfs, DMU_USERUSED_OBJECT,
+ uid) ||
+ zfs_id_overblockquota(outzfsvfs, DMU_GROUPUSED_OBJECT,
+ gid) ||
+ (projid != ZFS_DEFAULT_PROJID &&
+ zfs_id_overblockquota(outzfsvfs, DMU_PROJECTUSED_OBJECT,
+ projid))) {
error = SET_ERROR(EDQUOT);
- goto out;
+ break;
}
- tx = dmu_tx_create(os);
-
- dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes +
- ZFS_SA_BASE_ATTR_SIZE);
+ nbps = maxblocks;
+ error = dmu_read_l0_bps(inos, inzp->z_id, inoff, size, bps,
+ &nbps);
+ if (error != 0) {
+ /*
+ * If we are trying to clone a block that was created
+ * in the current transaction group, error will be
+ * EAGAIN here, which we can just return to the caller
+ * so it can fallback if it likes.
+ */
+ break;
+ }
- 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);
+ /*
+ * Start a transaction.
+ */
+ tx = dmu_tx_create(outos);
+ dmu_tx_hold_sa(tx, outzp->z_sa_hdl, B_FALSE);
+ db = (dmu_buf_impl_t *)sa_get_db(outzp->z_sa_hdl);
+ DB_DNODE_ENTER(db);
+ dmu_tx_hold_clone_by_dnode(tx, DB_DNODE(db), outoff, size);
+ DB_DNODE_EXIT(db);
+ zfs_sa_upgrade_txholds(tx, outzp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error != 0) {
+ dmu_tx_abort(tx);
+ break;
}
- 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);
+ /*
+ * Copy source znode's block size. This is done only if the
+ * whole znode is locked (see zfs_rangelock_cb()) and only
+ * on the first iteration since zfs_rangelock_reduce() will
+ * shrink down lr_length to the appropriate size.
+ */
+ if (outlr->lr_length == UINT64_MAX) {
+ zfs_grow_blocksize(outzp, inblksz, tx);
+
+ /*
+ * Block growth may fail for many reasons we can not
+ * predict here. If it happen the cloning is doomed.
+ */
+ if (inblksz != outzp->z_blksz) {
+ error = SET_ERROR(EINVAL);
dmu_tx_abort(tx);
- goto top;
+ break;
}
- 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.
+ * Round range lock up to the block boundary, so we
+ * prevent appends until we are done.
*/
- zfs_znode_delete(zp, tx);
- remove_inode_hash(ZTOI(zp));
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
- goto out;
+ zfs_rangelock_reduce(outlr, outoff,
+ ((len - 1) / inblksz + 1) * inblksz);
}
- if (fuid_dirtied)
- zfs_fuid_sync(zfsvfs, tx);
+ error = dmu_brt_clone(outos, outzp->z_id, outoff, size, tx,
+ bps, nbps);
+ if (error != 0) {
+ dmu_tx_commit(tx);
+ break;
+ }
- 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 & FAPPEND) ? V_APPEND : 0;
+ zfs_clear_setid_bits_if_necessary(outzfsvfs, outzp, cr,
+ &clear_setid_bits_txg, tx);
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- have_acl = B_FALSE;
+ zfs_tstamp_update_setup(outzp, CONTENT_MODIFIED, mtime, ctime);
/*
- * 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.
+ * Update the file size (zp_size) if it has changed;
+ * account for possible concurrent updates.
*/
- if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) {
- goto out;
+ while ((outsize = outzp->z_size) < outoff + size) {
+ (void) atomic_cas_64(&outzp->z_size, outsize,
+ outoff + size);
}
- mutex_enter(&dzp->z_lock);
- dzp->z_seq++;
- mutex_exit(&dzp->z_lock);
+ error = sa_bulk_update(outzp->z_sa_hdl, bulk, count, tx);
+
+ zfs_log_clone_range(zilog, tx, TX_CLONE_RANGE, outzp, outoff,
+ size, inblksz, bps, nbps);
+
+ dmu_tx_commit(tx);
+
+ if (error != 0)
+ break;
+
+ inoff += size;
+ outoff += size;
+ len -= size;
+ done += size;
+ }
+ vmem_free(bps, sizeof (bps[0]) * maxblocks);
+ zfs_znode_update_vfs(outzp);
+
+unlock:
+ zfs_rangelock_exit(outlr);
+ zfs_rangelock_exit(inlr);
+
+ if (done > 0) {
/*
- * Truncate regular files if requested.
+ * If we have made at least partial progress, reset the error.
*/
- 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:
+ error = 0;
+
+ ZFS_ACCESSTIME_STAMP(inzfsvfs, inzp);
- if (dl)
- zfs_dirent_unlock(dl);
+ if (outos->os_sync == ZFS_SYNC_ALWAYS) {
+ zil_commit(zilog, outzp->z_id);
+ }
- if (error) {
- if (zp)
- iput(ZTOI(zp));
+ *inoffp += done;
+ *outoffp += done;
+ *lenp = done;
} else {
- zfs_inode_update(dzp);
- zfs_inode_update(zp);
- *ipp = ZTOI(zp);
+ /*
+ * If we made no progress, there must be a good reason.
+ * EOF is handled explicitly above, before the loop.
+ */
+ ASSERT3S(error, !=, 0);
}
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
+ zfs_exit_two(inzfsvfs, outzfsvfs, FTAG);
- ZFS_EXIT(zfsvfs);
return (error);
}
-/* ARGSUSED */
+/*
+ * Usual pattern would be to call zfs_clone_range() from zfs_replay_clone(),
+ * but we cannot do that, because when replaying we don't have source znode
+ * available. This is why we need a dedicated replay function.
+ */
int
-zfs_tmpfile(struct inode *dip, vattr_t *vap, int excl,
- int mode, struct inode **ipp, cred_t *cr, int flag, vsecattr_t *vsecp)
+zfs_clone_range_replay(znode_t *zp, uint64_t off, uint64_t len, uint64_t blksz,
+ const blkptr_t *bps, size_t nbps)
{
- znode_t *zp = NULL, *dzp = ITOZ(dip);
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- objset_t *os;
+ zfsvfs_t *zfsvfs;
+ dmu_buf_impl_t *db;
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;
+ int count = 0;
+ sa_bulk_attr_t bulk[3];
+ uint64_t mtime[2], ctime[2];
- /*
- * If we have an ephemeral id, ACL, or XVATTR then
- * make sure file system is at proper version
- */
+ ASSERT3U(off, <, MAXOFFSET_T);
+ ASSERT3U(len, >, 0);
+ ASSERT3U(nbps, >, 0);
- gid = crgetgid(cr);
- uid = crgetuid(cr);
+ zfsvfs = ZTOZSB(zp);
- if (zfsvfs->z_use_fuids == B_FALSE &&
- (vsecp || IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
- return (SET_ERROR(EINVAL));
+ ASSERT(spa_feature_is_enabled(dmu_objset_spa(zfsvfs->z_os),
+ SPA_FEATURE_BLOCK_CLONING));
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- os = zfsvfs->z_os;
+ if ((error = zfs_enter_verify_zp(zfsvfs, zp, FTAG)) != 0)
+ return (error);
- 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);
- }
+ ASSERT(zfsvfs->z_replay);
+ ASSERT(!zfs_is_readonly(zfsvfs));
+
+ if ((off % blksz) != 0) {
+ zfs_exit(zfsvfs, FTAG);
+ return (SET_ERROR(EINVAL));
}
-top:
- *ipp = NULL;
+ 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);
/*
- * Create a new file object and update the directory
- * to reference it.
+ * Start a transaction.
*/
- if ((error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr))) {
- if (have_acl)
- zfs_acl_ids_free(&acl_ids);
- goto out;
+ 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_clone_by_dnode(tx, DB_DNODE(db), off, len);
+ DB_DNODE_EXIT(db);
+ zfs_sa_upgrade_txholds(tx, zp);
+ error = dmu_tx_assign(tx, TXG_WAIT);
+ if (error != 0) {
+ dmu_tx_abort(tx);
+ zfs_exit(zfsvfs, FTAG);
+ return (error);
}
- if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap,
- cr, vsecp, &acl_ids)) != 0)
- goto out;
- have_acl = B_TRUE;
+ if (zp->z_blksz < blksz)
+ zfs_grow_blocksize(zp, blksz, tx);
- if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) {
- zfs_acl_ids_free(&acl_ids);
- error = SET_ERROR(EDQUOT);
- goto out;
- }
+ dmu_brt_clone(zfsvfs->z_os, zp->z_id, off, len, tx, bps, nbps);
- tx = dmu_tx_create(os);
+ zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime);
- 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);
+ if (zp->z_size < off + len)
+ zp->z_size = off + len;
- 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 = 1;
- zfs_unlinked_add(zp, tx);
- zfs_acl_ids_free(&acl_ids);
- dmu_tx_commit(tx);
-out:
-
- if (error) {
- if (zp)
- iput(ZTOI(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: dip - inode of directory to remove entry from.
- * name - name of entry to remove.
- * cr - credentials of caller.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * dip - ctime|mtime
- * ip - ctime (if nlink > 0)
- */
-
-uint64_t null_xattr = 0;
-
-/*ARGSUSED*/
-int
-zfs_remove(struct inode *dip, char *name, cred_t *cr, int flags)
-{
- znode_t *zp, *dzp = ITOZ(dip);
- znode_t *xzp;
- struct inode *ip;
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- 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);
- }
-
- ip = ZTOI(zp);
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- /*
- * Need to use rmdir for removing directories.
- */
- if (S_ISDIR(ip->i_mode)) {
- error = SET_ERROR(EPERM);
- goto out;
- }
-
-#ifdef HAVE_DNLC
- if (realnmp)
- dnlc_remove(dvp, realnmp->pn_buf);
- else
- dnlc_remove(dvp, name);
-#endif /* HAVE_DNLC */
-
- mutex_enter(&zp->z_lock);
- may_delete_now = atomic_read(&ip->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);
- iput(ip);
- if (xzp)
- iput(ZTOI(xzp));
- goto top;
- }
- if (realnmp)
- pn_free(realnmp);
- dmu_tx_abort(tx);
- iput(ip);
- if (xzp)
- iput(ZTOI(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(&ip->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 = 1;
- 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);
-
- 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)
- iput(ip);
- else
- zfs_iput_async(ip);
-
- if (xzp) {
- zfs_inode_update(xzp);
- zfs_iput_async(ZTOI(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 dip using the name
- * provided. Return a pointer to the inserted directory.
- *
- * IN: dip - inode of directory to add subdir to.
- * dirname - name of new directory.
- * vap - attributes of new directory.
- * cr - credentials of caller.
- * vsecp - ACL to be set
- *
- * OUT: ipp - inode of created directory.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * dip - ctime|mtime updated
- * ipp - ctime|mtime|atime updated
- */
-/*ARGSUSED*/
-int
-zfs_mkdir(struct inode *dip, char *dirname, vattr_t *vap, struct inode **ipp,
- cred_t *cr, int flags, vsecattr_t *vsecp)
-{
- znode_t *zp, *dzp = ITOZ(dip);
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- 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:
- *ipp = 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_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);
-
- *ipp = ZTOI(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) {
- iput(ZTOI(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: dip - inode 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:
- * dip - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_rmdir(struct inode *dip, char *name, struct inode *cwd, cred_t *cr,
- int flags)
-{
- znode_t *dzp = ITOZ(dip);
- znode_t *zp;
- struct inode *ip;
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- 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);
- }
-
- ip = ZTOI(zp);
-
- if ((error = zfs_zaccess_delete(dzp, zp, cr))) {
- goto out;
- }
-
- if (!S_ISDIR(ip->i_mode)) {
- error = SET_ERROR(ENOTDIR);
- goto out;
- }
-
- if (ip == 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);
- iput(ip);
- goto top;
- }
- dmu_tx_abort(tx);
- iput(ip);
- 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);
- }
-
- 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);
- iput(ip);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
- ZFS_EXIT(zfsvfs);
- return (error);
-}
-
-/*
- * Read as many directory entries as will fit into the provided
- * dirent buffer from the given directory cursor position.
- *
- * IN: ip - inode of directory to read.
- * dirent - buffer for directory entries.
- *
- * OUT: dirent - filler buffer of directory entries.
- *
- * 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, struct dir_context *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 = !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(struct inode *ip, int syncflag, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
-
- (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: ip - inode of file.
- * vap - va_mask identifies requested attributes.
- * If ATTR_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 */
-int
-zfs_getattr(struct inode *ip, vattr_t *vap, int flags, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- int error = 0;
- uint64_t links;
- uint64_t atime[2], mtime[2], ctime[2];
- 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[3];
- 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_ATIME(zfsvfs), NULL, &atime, 16);
- 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);
-
- 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.
- */
-
- mutex_enter(&zp->z_lock);
- vap->va_type = vn_mode_to_vtype(zp->z_mode);
- vap->va_mode = zp->z_mode;
- vap->va_fsid = ZTOI(zp)->i_sb->s_dev;
- vap->va_nodeid = zp->z_id;
- if ((zp->z_id == zfsvfs->z_root) && zfs_show_ctldir(zp))
- links = ZTOI(zp)->i_nlink + 1;
- else
- links = ZTOI(zp)->i_nlink;
- vap->va_nlink = MIN(links, ZFS_LINK_MAX);
- vap->va_size = i_size_read(ip);
- vap->va_rdev = ip->i_rdev;
- vap->va_seq = ip->i_generation;
-
- /*
- * 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) &&
- S_ISREG(ip->i_mode)) {
- zfs_sa_get_scanstamp(zp, xvap);
- }
-
- if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
- uint64_t times[2];
-
- (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs),
- times, sizeof (times));
- ZFS_TIME_DECODE(&xoap->xoa_createtime, times);
- XVA_SET_RTN(xvap, XAT_CREATETIME);
- }
-
- 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 = ip->i_generation;
- 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);
- }
- }
-
- ZFS_TIME_DECODE(&vap->va_atime, atime);
- ZFS_TIME_DECODE(&vap->va_mtime, mtime);
- ZFS_TIME_DECODE(&vap->va_ctime, ctime);
-
- mutex_exit(&zp->z_lock);
-
- sa_object_size(zp->z_sa_hdl, &vap->va_blksize, &vap->va_nblocks);
-
- 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);
-}
-
-/*
- * 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);
-
- 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);
-}
-
-/*
- * Set the file attributes to the values contained in the
- * vattr structure.
- *
- * IN: ip - inode 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(struct inode *ip, vattr_t *vap, int flags, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- 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];
- 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, *xattr_bulk;
- int count = 0, xattr_count = 0;
-
- if (mask == 0)
- return (0);
-
- 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 & 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));
- }
-
- /*
- * 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);
-
- tmpxvattr = kmem_alloc(sizeof (xvattr_t), KM_SLEEP);
- xva_init(tmpxvattr);
-
- bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * 7, KM_SLEEP);
- xattr_bulk = kmem_alloc(sizeof (sa_bulk_attr_t) * 7, 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_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))) {
- 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_fuid_overquota(zfsvfs, B_FALSE, new_kuid)) {
- if (attrzp)
- iput(ZTOI(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_fuid_overquota(zfsvfs, B_TRUE, new_kgid)) {
- if (attrzp)
- iput(ZTOI(attrzp));
- err = SET_ERROR(EDQUOT);
- goto out2;
- }
- }
- }
- tx = dmu_tx_create(zfsvfs->z_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);
-
- zfs_acl_chmod_setattr(zp, &aclp, new_mode);
-
- 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))
- 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 (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 (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 = 0;
- 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 = timespec_trunc(vap->va_mtime,
- ZTOI(zp)->i_sb->s_time_gran);
-
- 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 = timespec_trunc(vap->va_ctime,
- ZTOI(zp)->i_sb->s_time_gran);
- SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
- ctime, sizeof (ctime));
- }
-
- 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(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 && attrzp) {
- 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)
- iput(ZTOI(attrzp));
- if (err == ERESTART)
- goto top;
- } else {
- err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
- dmu_tx_commit(tx);
- if (attrzp)
- iput(ZTOI(attrzp));
- zfs_inode_update(zp);
- }
-
-out2:
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
-
-out3:
- kmem_free(xattr_bulk, sizeof (sa_bulk_attr_t) * 7);
- kmem_free(bulk, sizeof (sa_bulk_attr_t) * 7);
- 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_iput_async(ZTOI(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: sdip - Source directory containing the "old entry".
- * snm - Old entry name.
- * tdip - 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:
- * sdip,tdip - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_rename(struct inode *sdip, char *snm, struct inode *tdip, char *tnm,
- cred_t *cr, int flags)
-{
- znode_t *tdzp, *szp, *tzp;
- znode_t *sdzp = ITOZ(sdip);
- zfsvfs_t *zfsvfs = ITOZSB(sdip);
- 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;
-
- tdzp = ITOZ(tdip);
- ZFS_VERIFY_ZP(tdzp);
-
- /*
- * We check i_sb because snapshots and the ctldir must have different
- * super blocks.
- */
- if (tdip->i_sb != sdip->i_sb || zfsctl_is_node(tdip)) {
- 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)
- iput(ZTOI(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);
- iput(ZTOI(szp));
-
- if (sdzp == tdzp)
- rw_exit(&sdzp->z_name_lock);
-
- if (strcmp(tnm, "..") == 0)
- terr = EINVAL;
- ZFS_EXIT(zfsvfs);
- return (terr);
- }
-
- /*
- * 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);
- iput(ZTOI(szp));
- if (tzp)
- iput(ZTOI(tzp));
- goto top;
- }
- dmu_tx_abort(tx);
- iput(ZTOI(szp));
- if (tzp)
- iput(ZTOI(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;
-
- 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);
- iput(ZTOI(szp));
- if (tzp) {
- zfs_inode_update(tzp);
- iput(ZTOI(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: dip - Directory to contain new symbolic link.
- * link - Name for new symlink entry.
- * vap - Attributes of new entry.
- * target - Target path of new symlink.
- *
- * cr - credentials of caller.
- * flags - case flags
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * dip - ctime|mtime updated
- */
-/*ARGSUSED*/
-int
-zfs_symlink(struct inode *dip, char *name, vattr_t *vap, char *link,
- struct inode **ipp, cred_t *cr, int flags)
-{
- znode_t *zp, *dzp = ITOZ(dip);
- zfs_dirlock_t *dl;
- dmu_tx_t *tx;
- zfsvfs_t *zfsvfs = ITOZSB(dip);
- 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:
- *ipp = 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_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) {
- *ipp = ZTOI(zp);
-
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
- } else {
- iput(ZTOI(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 tdip referencing sip.
- *
- * IN: tdip - Directory to contain new entry.
- * sip - inode of new entry.
- * name - name of new entry.
- * cr - credentials of caller.
- *
- * RETURN: 0 if success
- * error code if failure
- *
- * Timestamps:
- * tdip - ctime|mtime updated
- * sip - ctime updated
- */
-/* ARGSUSED */
-int
-zfs_link(struct inode *tdip, struct inode *sip, char *name, cred_t *cr,
- int flags)
-{
- znode_t *dzp = ITOZ(tdip);
- znode_t *tzp, *szp;
- zfsvfs_t *zfsvfs = ITOZSB(tdip);
- 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(tdip->i_mode));
-
- if (name == NULL)
- return (SET_ERROR(EINVAL));
-
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(dzp);
- 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));
- }
-
- szp = ITOZ(sip);
- ZFS_VERIFY_ZP(szp);
-
- /*
- * We check i_sb because snapshots and the ctldir must have different
- * super blocks.
- */
- if (sip->i_sb != tdip->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) != (dzp->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(dzp, 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, dzp, 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, dzp->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, dzp);
- 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 = 0;
- 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, be cause 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, dzp, szp, name);
- }
- } else if (is_tmpfile) {
- /* restore z_unlinked since when linking failed */
- szp->z_unlinked = 1;
- }
- 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)
- txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), txg);
-
- zfs_inode_update(dzp);
- 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;
- rl_t *rl;
- 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_owner_overquota(zfsvfs, zp, B_FALSE) ||
- zfs_owner_overquota(zfsvfs, zp, B_TRUE)) {
- 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);
-
- rl = zfs_range_lock(&zp->z_range_lock, 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_range_unlock(rl);
- ZFS_EXIT(zfsvfs);
- return (0);
- }
-
- /* Another process started write block if required */
- if (PageWriteback(pp)) {
- unlock_page(pp);
- zfs_range_unlock(rl);
-
- if (wbc->sync_mode != WB_SYNC_NONE)
- wait_on_page_writeback(pp);
-
- 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_range_unlock(rl);
- 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_range_unlock(rl);
- 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 = 0;
- 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_range_unlock(rl);
-
- 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 indroduced 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 = 1;
- 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 = 0;
-
- 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 == 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 {
- 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 = 0;
- mutex_exit(&zp->z_lock);
- dmu_tx_commit(tx);
- }
- }
-
- zfs_zinactive(zp);
- if (need_unlock)
- rw_exit(&zfsvfs->z_teardown_inactive_lock);
-}
-
-/*
- * Bounds-check the seek operation.
- *
- * IN: ip - inode seeking within
- * ooff - old file offset
- * noffp - pointer to new file offset
- * ct - caller context
- *
- * RETURN: 0 if success
- * EINVAL if new offset invalid
- */
-/* ARGSUSED */
-int
-zfs_seek(struct inode *ip, offset_t ooff, offset_t *noffp)
-{
- if (S_ISDIR(ip->i_mode))
- return (0);
- return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0);
-}
-
-/*
- * 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);
-}
-
-/*
- * convoff - converts the given data (start, whence) to the
- * given whence.
- */
-int
-convoff(struct inode *ip, flock64_t *lckdat, int whence, offset_t offset)
-{
- vattr_t vap;
- int error;
-
- if ((lckdat->l_whence == 2) || (whence == 2)) {
- if ((error = zfs_getattr(ip, &vap, 0, CRED())))
- return (error);
- }
-
- switch (lckdat->l_whence) {
- case 1:
- lckdat->l_start += offset;
- break;
- case 2:
- lckdat->l_start += vap.va_size;
- /* FALLTHRU */
- case 0:
- break;
- default:
- return (SET_ERROR(EINVAL));
- }
-
- if (lckdat->l_start < 0)
- return (SET_ERROR(EINVAL));
-
- switch (whence) {
- case 1:
- lckdat->l_start -= offset;
- break;
- case 2:
- lckdat->l_start -= vap.va_size;
- /* FALLTHRU */
- case 0:
- break;
- default:
- return (SET_ERROR(EINVAL));
- }
-
- lckdat->l_whence = (short)whence;
- 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: 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 [UNUSED].
- *
- * RETURN: 0 on success, error code on failure.
- *
- * Timestamps:
- * ip - ctime|mtime updated
- */
-/* ARGSUSED */
-int
-zfs_space(struct inode *ip, int cmd, flock64_t *bfp, int flag,
- offset_t offset, cred_t *cr)
-{
- znode_t *zp = ITOZ(ip);
- zfsvfs_t *zfsvfs = ITOZSB(ip);
- 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 ((error = convoff(ip, bfp, 0, offset))) {
- ZFS_EXIT(zfsvfs);
- return (error);
- }
-
- if (bfp->l_len < 0) {
- ZFS_EXIT(zfsvfs);
- return (SET_ERROR(EINVAL));
- }
+ error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
/*
- * 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.
+ * zil_replaying() not only check if we are replaying ZIL, but also
+ * updates the ZIL header to record replay progress.
*/
- 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(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;
- zilog_t *zilog = zfsvfs->z_log;
+ VERIFY(zil_replaying(zfsvfs->z_log, tx));
- ZFS_ENTER(zfsvfs);
- ZFS_VERIFY_ZP(zp);
+ dmu_tx_commit(tx);
- error = zfs_setacl(zp, vsecp, skipaclchk, cr);
+ zfs_znode_update_vfs(zp);
- if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)
- zil_commit(zilog, 0);
+ zfs_exit(zfsvfs, FTAG);
- ZFS_EXIT(zfsvfs);
return (error);
}
-#ifdef HAVE_UIO_ZEROCOPY
-/*
- * Tunable, both must be a power of 2.
- *
- * zcr_blksz_min: the smallest read we may consider to loan out an arcbuf
- * zcr_blksz_max: if set to less than the file block size, allow loaning out of
- * an arcbuf for a partial block read
- */
-int zcr_blksz_min = (1 << 10); /* 1K */
-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) && defined(HAVE_SPL)
-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);
-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_holey);
+EXPORT_SYMBOL(zfs_read);
+EXPORT_SYMBOL(zfs_write);
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);
-
-/* 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, long, 0644);
-MODULE_PARM_DESC(zfs_read_chunk_size, "Bytes to read per chunk");
-#endif
+EXPORT_SYMBOL(zfs_clone_range);
+EXPORT_SYMBOL(zfs_clone_range_replay);
+
+ZFS_MODULE_PARAM(zfs_vnops, zfs_vnops_, read_chunk_size, U64, ZMOD_RW,
+ "Bytes to read per chunk");
projects / mirror_zfs.git / blobdiff