-/*
- * This file is part of the SPL: Solaris Porting Layer.
- *
- * Copyright (c) 2008 Lawrence Livermore National Security, LLC.
- * Produced at Lawrence Livermore National Laboratory
- * Written by:
- * Brian Behlendorf <behlendorf1@llnl.gov>,
- * Herb Wartens <wartens2@llnl.gov>,
- * Jim Garlick <garlick@llnl.gov>
+/*****************************************************************************\
+ * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ * Copyright (C) 2007 The Regents of the University of California.
+ * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This file is part of the SPL, Solaris Porting Layer.
+ * For details, see <http://zfsonlinux.org/>.
+ *
+ * The SPL is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
*
- * This is distributed in the hope that it will be useful, but WITHOUT
+ * The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
+ * with the SPL. If not, see <http://www.gnu.org/licenses/>.
+ *****************************************************************************
+ * Solaris Porting Layer (SPL) Vnode Implementation.
+\*****************************************************************************/
-#include <sys/sysmacros.h>
+#include <sys/cred.h>
#include <sys/vnode.h>
-
-
-#ifdef DEBUG_SUBSYSTEM
-#undef DEBUG_SUBSYSTEM
-#endif
-
-#define DEBUG_SUBSYSTEM S_VNODE
+#include <sys/kmem_cache.h>
+#include <linux/falloc.h>
+#include <linux/file_compat.h>
vnode_t *rootdir = (vnode_t *)0xabcd1234;
EXPORT_SYMBOL(rootdir);
static spl_kmem_cache_t *vn_cache;
static spl_kmem_cache_t *vn_file_cache;
-static spinlock_t vn_file_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(vn_file_lock);
static LIST_HEAD(vn_file_list);
-static vtype_t
-vn_get_sol_type(umode_t mode)
+vtype_t
+vn_mode_to_vtype(mode_t mode)
{
if (S_ISREG(mode))
return VREG;
return VCHR;
return VNON;
-} /* vn_get_sol_type() */
+} /* vn_mode_to_vtype() */
+EXPORT_SYMBOL(vn_mode_to_vtype);
+
+mode_t
+vn_vtype_to_mode(vtype_t vtype)
+{
+ if (vtype == VREG)
+ return S_IFREG;
+
+ if (vtype == VDIR)
+ return S_IFDIR;
+
+ if (vtype == VCHR)
+ return S_IFCHR;
+
+ if (vtype == VBLK)
+ return S_IFBLK;
+
+ if (vtype == VFIFO)
+ return S_IFIFO;
+
+ if (vtype == VLNK)
+ return S_IFLNK;
+
+ if (vtype == VSOCK)
+ return S_IFSOCK;
+
+ return VNON;
+} /* vn_vtype_to_mode() */
+EXPORT_SYMBOL(vn_vtype_to_mode);
vnode_t *
vn_alloc(int flag)
{
vnode_t *vp;
- ENTRY;
vp = kmem_cache_alloc(vn_cache, flag);
if (vp != NULL) {
vp->v_type = 0;
}
- RETURN(vp);
+ return (vp);
} /* vn_alloc() */
EXPORT_SYMBOL(vn_alloc);
void
vn_free(vnode_t *vp)
{
- ENTRY;
kmem_cache_free(vn_cache, vp);
- EXIT;
} /* vn_free() */
EXPORT_SYMBOL(vn_free);
vn_open(const char *path, uio_seg_t seg, int flags, int mode,
vnode_t **vpp, int x1, void *x2)
{
- struct file *fp;
- struct kstat stat;
- int rc, saved_umask = 0;
+ struct file *fp;
+ struct kstat stat;
+ int rc, saved_umask = 0;
+ gfp_t saved_gfp;
vnode_t *vp;
- ENTRY;
ASSERT(flags & (FWRITE | FREAD));
ASSERT(seg == UIO_SYSSPACE);
if (flags & FCREAT)
saved_umask = xchg(¤t->fs->umask, 0);
- fp = filp_open(path, flags, mode);
+ fp = filp_open(path, flags, mode);
if (flags & FCREAT)
(void)xchg(¤t->fs->umask, saved_umask);
- if (IS_ERR(fp))
- RETURN(-PTR_ERR(fp));
+ if (IS_ERR(fp))
+ return (-PTR_ERR(fp));
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&fp->f_path, &stat);
+#else
+ rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
+#endif
if (rc) {
filp_close(fp, 0);
- RETURN(-rc);
+ return (-rc);
}
vp = vn_alloc(KM_SLEEP);
if (!vp) {
filp_close(fp, 0);
- RETURN(ENOMEM);
+ return (ENOMEM);
}
+ saved_gfp = mapping_gfp_mask(fp->f_mapping);
+ mapping_set_gfp_mask(fp->f_mapping, saved_gfp & ~(__GFP_IO|__GFP_FS));
+
mutex_enter(&vp->v_lock);
- vp->v_type = vn_get_sol_type(stat.mode);
+ vp->v_type = vn_mode_to_vtype(stat.mode);
vp->v_file = fp;
+ vp->v_gfp_mask = saved_gfp;
*vpp = vp;
mutex_exit(&vp->v_lock);
- RETURN(0);
+ return (0);
} /* vn_open() */
EXPORT_SYMBOL(vn_open);
{
char *realpath;
int len, rc;
- ENTRY;
ASSERT(vp == rootdir);
len = strlen(path) + 2;
- realpath = kmalloc(len, GFP_KERNEL);
+ realpath = kmalloc(len, kmem_flags_convert(KM_SLEEP));
if (!realpath)
- RETURN(ENOMEM);
+ return (ENOMEM);
(void)snprintf(realpath, len, "/%s", path);
rc = vn_open(realpath, seg, flags, mode, vpp, x1, x2);
kfree(realpath);
- RETURN(rc);
+ return (rc);
} /* vn_openat() */
EXPORT_SYMBOL(vn_openat);
int
vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len, offset_t off,
- uio_seg_t seg, int x1, rlim64_t x2, void *x3, ssize_t *residp)
+ uio_seg_t seg, int ioflag, rlim64_t x2, void *x3, ssize_t *residp)
{
loff_t offset;
mm_segment_t saved_fs;
struct file *fp;
int rc;
- ENTRY;
ASSERT(uio == UIO_WRITE || uio == UIO_READ);
ASSERT(vp);
ASSERT(vp->v_file);
ASSERT(seg == UIO_SYSSPACE);
- ASSERT(x1 == 0);
+ ASSERT((ioflag & ~FAPPEND) == 0);
ASSERT(x2 == RLIM64_INFINITY);
- offset = off;
fp = vp->v_file;
+ offset = off;
+ if (ioflag & FAPPEND)
+ offset = fp->f_pos;
+
/* Writable user data segment must be briefly increased for this
* process so we can use the user space read call paths to write
* in to memory allocated by the kernel. */
rc = vfs_read(fp, addr, len, &offset);
set_fs(saved_fs);
+ fp->f_pos = offset;
if (rc < 0)
- RETURN(-rc);
+ return (-rc);
if (residp) {
*residp = len - rc;
} else {
if (rc != len)
- RETURN(EIO);
+ return (EIO);
}
- RETURN(0);
+ return (0);
} /* vn_rdwr() */
EXPORT_SYMBOL(vn_rdwr);
vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4)
{
int rc;
- ENTRY;
ASSERT(vp);
ASSERT(vp->v_file);
+ mapping_set_gfp_mask(vp->v_file->f_mapping, vp->v_gfp_mask);
rc = filp_close(vp->v_file, 0);
vn_free(vp);
- RETURN(-rc);
+ return (-rc);
} /* vn_close() */
EXPORT_SYMBOL(vn_close);
* proposed seek. We perform minimal checking and allow vn_rdwr() to catch
* anything more serious. */
int
-vn_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct)
+vn_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, void *ct)
{
return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0);
}
EXPORT_SYMBOL(vn_seek);
-static struct dentry *
-vn_lookup_hash(struct nameidata *nd)
+/*
+ * spl_basename() takes a NULL-terminated string s as input containing a path.
+ * It returns a char pointer to a string and a length that describe the
+ * basename of the path. If the basename is not "." or "/", it will be an index
+ * into the string. While the string should be NULL terminated, the section
+ * referring to the basename is not. spl_basename is dual-licensed GPLv2+ and
+ * CC0. Anyone wishing to reuse it in another codebase may pick either license.
+ */
+static void
+spl_basename(const char *s, const char **str, int *len)
{
- return lookup_one_len(nd->last.name, nd->nd_dentry, nd->last.len);
-} /* lookup_hash() */
+ size_t i, end;
-static void
-vn_path_release(struct nameidata *nd)
+ ASSERT(str);
+ ASSERT(len);
+
+ if (!s || !*s) {
+ *str = ".";
+ *len = 1;
+ return;
+ }
+
+ i = strlen(s) - 1;
+
+ while (i && s[i--] == '/');
+
+ if (i == 0) {
+ *str = "/";
+ *len = 1;
+ return;
+ }
+
+ end = i;
+
+ for (end = i; i; i--) {
+ if (s[i] == '/') {
+ *str = &s[i+1];
+ *len = end - i + 1;
+ return;
+ }
+ }
+
+ *str = s;
+ *len = end + 1;
+}
+
+static struct dentry *
+spl_kern_path_locked(const char *name, struct path *path)
{
- dput(nd->nd_dentry);
- mntput(nd->nd_mnt);
+ struct path parent;
+ struct dentry *dentry;
+ const char *basename;
+ int len;
+ int rc;
+
+ ASSERT(name);
+ ASSERT(path);
+
+ spl_basename(name, &basename, &len);
+
+ /* We do not accept "." or ".." */
+ if (len <= 2 && basename[0] == '.')
+ if (len == 1 || basename[1] == '.')
+ return (ERR_PTR(-EACCES));
+
+ rc = kern_path(name, LOOKUP_PARENT, &parent);
+ if (rc)
+ return (ERR_PTR(rc));
+
+ /* use I_MUTEX_PARENT because vfs_unlink needs it */
+ spl_inode_lock_nested(parent.dentry->d_inode, I_MUTEX_PARENT);
+
+ dentry = lookup_one_len(basename, parent.dentry, len);
+ if (IS_ERR(dentry)) {
+ spl_inode_unlock(parent.dentry->d_inode);
+ path_put(&parent);
+ } else {
+ *path = parent;
+ }
+
+ return (dentry);
}
-/* Modified do_unlinkat() from linux/fs/namei.c, only uses exported symbols */
+/* Based on do_unlinkat() from linux/fs/namei.c */
int
vn_remove(const char *path, uio_seg_t seg, int flags)
{
- struct dentry *dentry;
- struct nameidata nd;
- struct inode *inode = NULL;
- int rc = 0;
- ENTRY;
-
- ASSERT(seg == UIO_SYSSPACE);
- ASSERT(flags == RMFILE);
+ struct dentry *dentry;
+ struct path parent;
+ struct inode *inode = NULL;
+ int rc = 0;
- rc = path_lookup(path, LOOKUP_PARENT, &nd);
- if (rc)
- GOTO(exit, rc);
+ ASSERT(seg == UIO_SYSSPACE);
+ ASSERT(flags == RMFILE);
+
+ dentry = spl_kern_path_locked(path, &parent);
+ rc = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ if (parent.dentry->d_name.name[parent.dentry->d_name.len]) {
+ rc = 0;
+ goto slashes;
+ }
- rc = -EISDIR;
- if (nd.last_type != LAST_NORM)
- GOTO(exit1, rc);
+ inode = dentry->d_inode;
+ if (inode) {
+ atomic_inc(&inode->i_count);
+ } else {
+ rc = 0;
+ goto slashes;
+ }
-#ifdef HAVE_INODE_I_MUTEX
- mutex_lock_nested(&nd.nd_dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-#else
- down(&nd.nd_dentry->d_inode->i_sem);
-#endif /* HAVE_INODE_I_MUTEX */
- dentry = vn_lookup_hash(&nd);
- rc = PTR_ERR(dentry);
- if (!IS_ERR(dentry)) {
- /* Why not before? Because we want correct rc value */
- if (nd.last.name[nd.last.len])
- GOTO(slashes, rc);
-
- inode = dentry->d_inode;
- if (inode)
- atomic_inc(&inode->i_count);
#ifdef HAVE_2ARGS_VFS_UNLINK
- rc = vfs_unlink(nd.nd_dentry->d_inode, dentry);
+ rc = vfs_unlink(parent.dentry->d_inode, dentry);
#else
- rc = vfs_unlink(nd.nd_dentry->d_inode, dentry, nd.nd_mnt);
+ rc = vfs_unlink(parent.dentry->d_inode, dentry, NULL);
#endif /* HAVE_2ARGS_VFS_UNLINK */
-exit2:
- dput(dentry);
- }
-#ifdef HAVE_INODE_I_MUTEX
- mutex_unlock(&nd.nd_dentry->d_inode->i_mutex);
-#else
- up(&nd.nd_dentry->d_inode->i_sem);
-#endif /* HAVE_INODE_I_MUTEX */
- if (inode)
- iput(inode); /* truncate the inode here */
exit1:
- vn_path_release(&nd);
-exit:
- RETURN(-rc);
+ dput(dentry);
+ } else {
+ return (-rc);
+ }
+
+ spl_inode_unlock(parent.dentry->d_inode);
+ if (inode)
+ iput(inode); /* truncate the inode here */
+
+ path_put(&parent);
+ return (-rc);
slashes:
- rc = !dentry->d_inode ? -ENOENT :
- S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
- GOTO(exit2, rc);
+ rc = !dentry->d_inode ? -ENOENT :
+ S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
+ goto exit1;
} /* vn_remove() */
EXPORT_SYMBOL(vn_remove);
-/* Modified do_rename() from linux/fs/namei.c, only uses exported symbols */
+/* Based on do_rename() from linux/fs/namei.c */
int
vn_rename(const char *oldname, const char *newname, int x1)
{
- struct dentry *old_dir, *new_dir;
- struct dentry *old_dentry, *new_dentry;
- struct dentry *trap;
- struct nameidata oldnd, newnd;
- int rc = 0;
- ENTRY;
-
- rc = path_lookup(oldname, LOOKUP_PARENT, &oldnd);
- if (rc)
- GOTO(exit, rc);
+ struct dentry *old_dir, *new_dir;
+ struct dentry *old_dentry, *new_dentry;
+ struct dentry *trap;
+ struct path old_parent, new_parent;
+ int rc = 0;
- rc = path_lookup(newname, LOOKUP_PARENT, &newnd);
- if (rc)
- GOTO(exit1, rc);
-
- rc = -EXDEV;
- if (oldnd.nd_mnt != newnd.nd_mnt)
- GOTO(exit2, rc);
-
- old_dir = oldnd.nd_dentry;
- rc = -EBUSY;
- if (oldnd.last_type != LAST_NORM)
- GOTO(exit2, rc);
-
- new_dir = newnd.nd_dentry;
- if (newnd.last_type != LAST_NORM)
- GOTO(exit2, rc);
-
- trap = lock_rename(new_dir, old_dir);
-
- old_dentry = vn_lookup_hash(&oldnd);
-
- rc = PTR_ERR(old_dentry);
- if (IS_ERR(old_dentry))
- GOTO(exit3, rc);
-
- /* source must exist */
- rc = -ENOENT;
- if (!old_dentry->d_inode)
- GOTO(exit4, rc);
-
- /* unless the source is a directory trailing slashes give -ENOTDIR */
- if (!S_ISDIR(old_dentry->d_inode->i_mode)) {
- rc = -ENOTDIR;
- if (oldnd.last.name[oldnd.last.len])
- GOTO(exit4, rc);
- if (newnd.last.name[newnd.last.len])
- GOTO(exit4, rc);
- }
-
- /* source should not be ancestor of target */
- rc = -EINVAL;
- if (old_dentry == trap)
- GOTO(exit4, rc);
-
- new_dentry = vn_lookup_hash(&newnd);
- rc = PTR_ERR(new_dentry);
- if (IS_ERR(new_dentry))
- GOTO(exit4, rc);
-
- /* target should not be an ancestor of source */
- rc = -ENOTEMPTY;
- if (new_dentry == trap)
- GOTO(exit5, rc);
-
-#ifdef HAVE_4ARGS_VFS_RENAME
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry);
+ old_dentry = spl_kern_path_locked(oldname, &old_parent);
+ if (IS_ERR(old_dentry)) {
+ rc = PTR_ERR(old_dentry);
+ goto exit;
+ }
+
+ spl_inode_unlock(old_parent.dentry->d_inode);
+
+ new_dentry = spl_kern_path_locked(newname, &new_parent);
+ if (IS_ERR(new_dentry)) {
+ rc = PTR_ERR(new_dentry);
+ goto exit2;
+ }
+
+ spl_inode_unlock(new_parent.dentry->d_inode);
+
+ rc = -EXDEV;
+ if (old_parent.mnt != new_parent.mnt)
+ goto exit3;
+
+ old_dir = old_parent.dentry;
+ new_dir = new_parent.dentry;
+ trap = lock_rename(new_dir, old_dir);
+
+ /* source should not be ancestor of target */
+ rc = -EINVAL;
+ if (old_dentry == trap)
+ goto exit4;
+
+ /* target should not be an ancestor of source */
+ rc = -ENOTEMPTY;
+ if (new_dentry == trap)
+ goto exit4;
+
+ /* source must exist */
+ rc = -ENOENT;
+ if (!old_dentry->d_inode)
+ goto exit4;
+
+ /* unless the source is a directory trailing slashes give -ENOTDIR */
+ if (!S_ISDIR(old_dentry->d_inode->i_mode)) {
+ rc = -ENOTDIR;
+ if (old_dentry->d_name.name[old_dentry->d_name.len])
+ goto exit4;
+ if (new_dentry->d_name.name[new_dentry->d_name.len])
+ goto exit4;
+ }
+
+#if defined(HAVE_4ARGS_VFS_RENAME)
+ rc = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry);
+#elif defined(HAVE_5ARGS_VFS_RENAME)
+ rc = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry, NULL);
#else
- rc = vfs_rename(old_dir->d_inode, old_dentry, oldnd.nd_mnt,
- new_dir->d_inode, new_dentry, newnd.nd_mnt);
-#endif /* HAVE_4ARGS_VFS_RENAME */
-exit5:
- dput(new_dentry);
+ rc = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry, NULL, 0);
+#endif
exit4:
- dput(old_dentry);
+ unlock_rename(new_dir, old_dir);
exit3:
- unlock_rename(new_dir, old_dir);
+ dput(new_dentry);
+ path_put(&new_parent);
exit2:
- vn_path_release(&newnd);
-exit1:
- vn_path_release(&oldnd);
+ dput(old_dentry);
+ path_put(&old_parent);
exit:
- RETURN(-rc);
+ return (-rc);
}
EXPORT_SYMBOL(vn_rename);
vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4)
{
struct file *fp;
- struct kstat stat;
+ struct kstat stat;
int rc;
- ENTRY;
ASSERT(vp);
ASSERT(vp->v_file);
fp = vp->v_file;
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&fp->f_path, &stat);
+#else
+ rc = vfs_getattr(fp->f_path.mnt, fp->f_dentry, &stat);
+#endif
if (rc)
- RETURN(-rc);
+ return (-rc);
- vap->va_type = vn_get_sol_type(stat.mode);
+ vap->va_type = vn_mode_to_vtype(stat.mode);
vap->va_mode = stat.mode;
- vap->va_uid = stat.uid;
- vap->va_gid = stat.gid;
+ vap->va_uid = KUID_TO_SUID(stat.uid);
+ vap->va_gid = KGID_TO_SGID(stat.gid);
vap->va_fsid = 0;
vap->va_nodeid = stat.ino;
vap->va_nlink = stat.nlink;
vap->va_size = stat.size;
- vap->va_blocksize = stat.blksize;
- vap->va_atime.tv_sec = stat.atime.tv_sec;
- vap->va_atime.tv_usec = stat.atime.tv_nsec / NSEC_PER_USEC;
- vap->va_mtime.tv_sec = stat.mtime.tv_sec;
- vap->va_mtime.tv_usec = stat.mtime.tv_nsec / NSEC_PER_USEC;
- vap->va_ctime.tv_sec = stat.ctime.tv_sec;
- vap->va_ctime.tv_usec = stat.ctime.tv_nsec / NSEC_PER_USEC;
+ vap->va_blksize = stat.blksize;
+ vap->va_atime = stat.atime;
+ vap->va_mtime = stat.mtime;
+ vap->va_ctime = stat.ctime;
vap->va_rdev = stat.rdev;
- vap->va_blocks = stat.blocks;
+ vap->va_nblocks = stat.blocks;
- RETURN(0);
+ return (0);
}
EXPORT_SYMBOL(vn_getattr);
int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4)
{
int datasync = 0;
- ENTRY;
+ int error;
+ int fstrans;
ASSERT(vp);
ASSERT(vp->v_file);
if (flags & FDSYNC)
datasync = 1;
- RETURN(-file_fsync(vp->v_file, vp->v_file->f_dentry, datasync));
+ /*
+ * May enter XFS which generates a warning when PF_FSTRANS is set.
+ * To avoid this the flag is cleared over vfs_sync() and then reset.
+ */
+ fstrans = spl_fstrans_check();
+ if (fstrans)
+ current->flags &= ~(PF_FSTRANS);
+
+ error = -spl_filp_fsync(vp->v_file, datasync);
+ if (fstrans)
+ current->flags |= PF_FSTRANS;
+
+ return (error);
} /* vn_fsync() */
EXPORT_SYMBOL(vn_fsync);
+int vn_space(vnode_t *vp, int cmd, struct flock *bfp, int flag,
+ offset_t offset, void *x6, void *x7)
+{
+ int error = EOPNOTSUPP;
+
+ if (cmd != F_FREESP || bfp->l_whence != 0)
+ return (EOPNOTSUPP);
+
+ ASSERT(vp);
+ ASSERT(vp->v_file);
+ ASSERT(bfp->l_start >= 0 && bfp->l_len > 0);
+
+#ifdef FALLOC_FL_PUNCH_HOLE
+ /*
+ * When supported by the underlying file system preferentially
+ * use the fallocate() callback to preallocate the space.
+ */
+ error = -spl_filp_fallocate(vp->v_file,
+ FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE,
+ bfp->l_start, bfp->l_len);
+ if (error == 0)
+ return (0);
+#endif
+
+#ifdef HAVE_INODE_TRUNCATE_RANGE
+ if (vp->v_file->f_dentry && vp->v_file->f_dentry->d_inode &&
+ vp->v_file->f_dentry->d_inode->i_op &&
+ vp->v_file->f_dentry->d_inode->i_op->truncate_range) {
+ off_t end = bfp->l_start + bfp->l_len;
+ /*
+ * Judging from the code in shmem_truncate_range(),
+ * it seems the kernel expects the end offset to be
+ * inclusive and aligned to the end of a page.
+ */
+ if (end % PAGE_SIZE != 0) {
+ end &= ~(off_t)(PAGE_SIZE - 1);
+ if (end <= bfp->l_start)
+ return (0);
+ }
+ --end;
+
+ vp->v_file->f_dentry->d_inode->i_op->truncate_range(
+ vp->v_file->f_dentry->d_inode,
+ bfp->l_start, end
+ );
+ return (0);
+ }
+#endif
+
+ return (error);
+}
+EXPORT_SYMBOL(vn_space);
+
/* Function must be called while holding the vn_file_lock */
static file_t *
-file_find(int fd)
+file_find(int fd, struct task_struct *task)
{
file_t *fp;
ASSERT(spin_is_locked(&vn_file_lock));
list_for_each_entry(fp, &vn_file_list, f_list) {
- if (fd == fp->f_fd) {
+ if (fd == fp->f_fd && fp->f_task == task) {
ASSERT(atomic_read(&fp->f_ref) != 0);
return fp;
}
file_t *fp;
vnode_t *vp;
int rc = 0;
- ENTRY;
+
+ if (fd < 0)
+ return (NULL);
/* Already open just take an extra reference */
spin_lock(&vn_file_lock);
- fp = file_find(fd);
+ fp = file_find(fd, current);
if (fp) {
atomic_inc(&fp->f_ref);
spin_unlock(&vn_file_lock);
- RETURN(fp);
+ return (fp);
}
spin_unlock(&vn_file_lock);
/* File was not yet opened create the object and setup */
fp = kmem_cache_alloc(vn_file_cache, KM_SLEEP);
if (fp == NULL)
- GOTO(out, rc);
+ goto out;
mutex_enter(&fp->f_lock);
fp->f_fd = fd;
+ fp->f_task = current;
fp->f_offset = 0;
atomic_inc(&fp->f_ref);
lfp = fget(fd);
if (lfp == NULL)
- GOTO(out_mutex, rc);
+ goto out_mutex;
vp = vn_alloc(KM_SLEEP);
if (vp == NULL)
- GOTO(out_fget, rc);
+ goto out_fget;
- if (vfs_getattr(lfp->f_vfsmnt, lfp->f_dentry, &stat))
- GOTO(out_vnode, rc);
+#ifdef HAVE_2ARGS_VFS_GETATTR
+ rc = vfs_getattr(&lfp->f_path, &stat);
+#else
+ rc = vfs_getattr(lfp->f_path.mnt, lfp->f_dentry, &stat);
+#endif
+ if (rc)
+ goto out_vnode;
mutex_enter(&vp->v_lock);
- vp->v_type = vn_get_sol_type(stat.mode);
+ vp->v_type = vn_mode_to_vtype(stat.mode);
vp->v_file = lfp;
mutex_exit(&vp->v_lock);
spin_unlock(&vn_file_lock);
mutex_exit(&fp->f_lock);
- RETURN(fp);
+ return (fp);
out_vnode:
vn_free(vp);
mutex_exit(&fp->f_lock);
kmem_cache_free(vn_file_cache, fp);
out:
- RETURN(NULL);
+ return (NULL);
} /* getf() */
EXPORT_SYMBOL(getf);
void
vn_releasef(int fd)
+{
+ areleasef(fd, P_FINFO(current));
+}
+EXPORT_SYMBOL(releasef);
+
+void
+vn_areleasef(int fd, uf_info_t *fip)
{
file_t *fp;
- ENTRY;
+ struct task_struct *task = (struct task_struct *)fip;
+
+ if (fd < 0)
+ return;
spin_lock(&vn_file_lock);
- fp = file_find(fd);
+ fp = file_find(fd, task);
if (fp) {
atomic_dec(&fp->f_ref);
if (atomic_read(&fp->f_ref) > 0) {
spin_unlock(&vn_file_lock);
- EXIT;
return;
}
}
spin_unlock(&vn_file_lock);
- EXIT;
return;
} /* releasef() */
-EXPORT_SYMBOL(releasef);
-
-#ifndef HAVE_SET_FS_PWD
-# ifdef HAVE_2ARGS_SET_FS_PWD
-/* Used from 2.6.25 - 2.6.31+ */
-void
-set_fs_pwd(struct fs_struct *fs, struct path *path)
-{
- struct path old_pwd;
+EXPORT_SYMBOL(areleasef);
- write_lock(&fs->lock);
- old_pwd = fs->pwd;
- fs->pwd = *path;
- path_get(path);
- write_unlock(&fs->lock);
- if (old_pwd.dentry)
- path_put(&old_pwd);
-}
-# else
-/* Used from 2.6.11 - 2.6.24 */
-void
-set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt, struct dentry *dentry)
+static void
+#ifdef HAVE_SET_FS_PWD_WITH_CONST
+vn_set_fs_pwd(struct fs_struct *fs, const struct path *path)
+#else
+vn_set_fs_pwd(struct fs_struct *fs, struct path *path)
+#endif /* HAVE_SET_FS_PWD_WITH_CONST */
{
- struct dentry *old_pwd;
- struct vfsmount *old_pwdmnt;
-
- write_lock(&fs->lock);
- old_pwd = fs->pwd;
- old_pwdmnt = fs->pwdmnt;
- fs->pwdmnt = mntget(mnt);
- fs->pwd = dget(dentry);
- write_unlock(&fs->lock);
-
- if (old_pwd) {
- dput(old_pwd);
- mntput(old_pwdmnt);
- }
+ struct path old_pwd;
+
+#ifdef HAVE_FS_STRUCT_SPINLOCK
+ spin_lock(&fs->lock);
+ old_pwd = fs->pwd;
+ fs->pwd = *path;
+ path_get(path);
+ spin_unlock(&fs->lock);
+#else
+ write_lock(&fs->lock);
+ old_pwd = fs->pwd;
+ fs->pwd = *path;
+ path_get(path);
+ write_unlock(&fs->lock);
+#endif /* HAVE_FS_STRUCT_SPINLOCK */
+
+ if (old_pwd.dentry)
+ path_put(&old_pwd);
}
-# endif /* HAVE_2ARGS_SET_FS_PWD */
-#endif /* HAVE_SET_FS_PWD */
int
vn_set_pwd(const char *filename)
{
-#ifdef HAVE_2ARGS_SET_FS_PWD
struct path path;
+ mm_segment_t saved_fs;
int rc;
- ENTRY;
+
+ /*
+ * user_path_dir() and __user_walk() both expect 'filename' to be
+ * a user space address so we must briefly increase the data segment
+ * size to ensure strncpy_from_user() does not fail with -EFAULT.
+ */
+ saved_fs = get_fs();
+ set_fs(get_ds());
rc = user_path_dir(filename, &path);
if (rc)
- GOTO(out, rc);
+ goto out;
rc = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
if (rc)
- GOTO(dput_and_out, rc);
+ goto dput_and_out;
- set_fs_pwd(current->fs, &path);
+ vn_set_fs_pwd(current->fs, &path);
dput_and_out:
path_put(&path);
-#else
- struct nameidata nd;
- int rc;
- ENTRY;
-
- rc = __user_walk(filename,
- LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
- if (rc)
- GOTO(out, rc);
-
- rc = vfs_permission(&nd, MAY_EXEC);
- if (rc)
- GOTO(dput_and_out, rc);
-
- set_fs_pwd(current->fs, nd.nd_mnt, nd.nd_dentry);
-
-dput_and_out:
- vn_path_release(&nd);
-#endif /* HAVE_2ARGS_SET_FS_PWD */
out:
- RETURN(-rc);
+ set_fs(saved_fs);
+
+ return (-rc);
} /* vn_set_pwd() */
EXPORT_SYMBOL(vn_set_pwd);
} /* vn_file_cache_destructor() */
int
-vn_init(void)
+spl_vn_init(void)
{
- ENTRY;
vn_cache = kmem_cache_create("spl_vn_cache",
sizeof(struct vnode), 64,
vn_cache_constructor,
vn_file_cache_constructor,
vn_file_cache_destructor,
NULL, NULL, NULL, 0);
- RETURN(0);
+ return (0);
} /* vn_init() */
void
-vn_fini(void)
+spl_vn_fini(void)
{
file_t *fp, *next_fp;
int leaked = 0;
- ENTRY;
spin_lock(&vn_file_lock);
leaked++;
}
- kmem_cache_destroy(vn_file_cache);
- vn_file_cache = NULL;
spin_unlock(&vn_file_lock);
if (leaked > 0)
- CWARN("Warning %d files leaked\n", leaked);
+ printk(KERN_WARNING "WARNING: %d vnode files leaked\n", leaked);
+ kmem_cache_destroy(vn_file_cache);
kmem_cache_destroy(vn_cache);
- EXIT;
return;
} /* vn_fini() */
projects / mirror_spl-debian.git / blobdiff