-/*****************************************************************************\
+/*
* 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).
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
- *****************************************************************************
+ *
* Solaris Porting Layer (SPL) Vnode Implementation.
-\*****************************************************************************/
+ */
+#include <sys/cred.h>
#include <sys/vnode.h>
+#include <sys/kmem_cache.h>
#include <linux/falloc.h>
-#include <spl-debug.h>
-
-#ifdef SS_DEBUG_SUBSYS
-#undef SS_DEBUG_SUBSYS
-#endif
-
-#define SS_DEBUG_SUBSYS SS_VNODE
+#include <linux/file_compat.h>
vnode_t *rootdir = (vnode_t *)0xabcd1234;
EXPORT_SYMBOL(rootdir);
static DEFINE_SPINLOCK(vn_file_lock);
static LIST_HEAD(vn_file_list);
-#ifdef HAVE_KERN_PATH_PARENT_HEADER
-#ifndef HAVE_KERN_PATH_PARENT_SYMBOL
-kern_path_parent_t kern_path_parent_fn = SYMBOL_POISON;
-EXPORT_SYMBOL(kern_path_parent_fn);
-#endif /* HAVE_KERN_PATH_PARENT_SYMBOL */
-#endif /* HAVE_KERN_PATH_PARENT_HEADER */
-
-#ifdef HAVE_KERN_PATH_LOCKED
-kern_path_locked_t kern_path_locked_fn = SYMBOL_POISON;
-#endif /* HAVE_KERN_PATH_LOCKED */
-
vtype_t
vn_mode_to_vtype(mode_t mode)
{
if (S_ISREG(mode))
- return VREG;
+ return (VREG);
if (S_ISDIR(mode))
- return VDIR;
+ return (VDIR);
if (S_ISCHR(mode))
- return VCHR;
+ return (VCHR);
if (S_ISBLK(mode))
- return VBLK;
+ return (VBLK);
if (S_ISFIFO(mode))
- return VFIFO;
+ return (VFIFO);
if (S_ISLNK(mode))
- return VLNK;
+ return (VLNK);
if (S_ISSOCK(mode))
- return VSOCK;
-
- if (S_ISCHR(mode))
- return VCHR;
+ return (VSOCK);
- return VNON;
+ return (VNON);
} /* vn_mode_to_vtype() */
EXPORT_SYMBOL(vn_mode_to_vtype);
vn_vtype_to_mode(vtype_t vtype)
{
if (vtype == VREG)
- return S_IFREG;
+ return (S_IFREG);
if (vtype == VDIR)
- return S_IFDIR;
+ return (S_IFDIR);
if (vtype == VCHR)
- return S_IFCHR;
+ return (S_IFCHR);
if (vtype == VBLK)
- return S_IFBLK;
+ return (S_IFBLK);
if (vtype == VFIFO)
- return S_IFIFO;
+ return (S_IFIFO);
if (vtype == VLNK)
- return S_IFLNK;
+ return (S_IFLNK);
if (vtype == VSOCK)
- return S_IFSOCK;
+ return (S_IFSOCK);
- return VNON;
+ return (VNON);
} /* vn_vtype_to_mode() */
EXPORT_SYMBOL(vn_vtype_to_mode);
vn_alloc(int flag)
{
vnode_t *vp;
- SENTRY;
vp = kmem_cache_alloc(vn_cache, flag);
if (vp != NULL) {
vp->v_type = 0;
}
- SRETURN(vp);
+ return (vp);
} /* vn_alloc() */
EXPORT_SYMBOL(vn_alloc);
void
vn_free(vnode_t *vp)
{
- SENTRY;
kmem_cache_free(vn_cache, vp);
- SEXIT;
} /* vn_free() */
EXPORT_SYMBOL(vn_free);
int rc, saved_umask = 0;
gfp_t saved_gfp;
vnode_t *vp;
- SENTRY;
ASSERT(flags & (FWRITE | FREAD));
ASSERT(seg == UIO_SYSSPACE);
if (!(flags & FCREAT) && (flags & FWRITE))
flags |= FEXCL;
- /* Note for filp_open() the two low bits must be remapped to mean:
+ /*
+ * Note for filp_open() the two low bits must be remapped to mean:
* 01 - read-only -> 00 read-only
* 10 - write-only -> 01 write-only
* 11 - read-write -> 10 read-write
fp = filp_open(path, flags, mode);
if (flags & FCREAT)
- (void)xchg(¤t->fs->umask, saved_umask);
+ (void) xchg(¤t->fs->umask, saved_umask);
if (IS_ERR(fp))
- SRETURN(-PTR_ERR(fp));
+ return (-PTR_ERR(fp));
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&fp->f_path, &stat, STATX_TYPE, AT_STATX_SYNC_AS_STAT);
+#elif defined(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);
- SRETURN(-rc);
+ return (-rc);
}
vp = vn_alloc(KM_SLEEP);
if (!vp) {
filp_close(fp, 0);
- SRETURN(ENOMEM);
+ return (ENOMEM);
}
saved_gfp = mapping_gfp_mask(fp->f_mapping);
*vpp = vp;
mutex_exit(&vp->v_lock);
- SRETURN(0);
+ return (0);
} /* vn_open() */
EXPORT_SYMBOL(vn_open);
int
vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
- vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd)
+ vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd)
{
char *realpath;
int len, rc;
- SENTRY;
ASSERT(vp == rootdir);
len = strlen(path) + 2;
- realpath = kmalloc(len, GFP_KERNEL);
+ realpath = kmalloc(len, kmem_flags_convert(KM_SLEEP));
if (!realpath)
- SRETURN(ENOMEM);
+ return (ENOMEM);
- (void)snprintf(realpath, len, "/%s", path);
+ (void) snprintf(realpath, len, "/%s", path);
rc = vn_open(realpath, seg, flags, mode, vpp, x1, x2);
kfree(realpath);
- SRETURN(rc);
+ return (rc);
} /* vn_openat() */
EXPORT_SYMBOL(vn_openat);
vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len, offset_t off,
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;
+ struct file *fp = vp->v_file;
+ loff_t offset = off;
int rc;
- SENTRY;
ASSERT(uio == UIO_WRITE || uio == UIO_READ);
- ASSERT(vp);
- ASSERT(vp->v_file);
ASSERT(seg == UIO_SYSSPACE);
ASSERT((ioflag & ~FAPPEND) == 0);
- ASSERT(x2 == RLIM64_INFINITY);
- 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. */
- saved_fs = get_fs();
- set_fs(get_ds());
-
if (uio & UIO_WRITE)
- rc = vfs_write(fp, addr, len, &offset);
+ rc = spl_kernel_write(fp, addr, len, &offset);
else
- rc = vfs_read(fp, addr, len, &offset);
+ rc = spl_kernel_read(fp, addr, len, &offset);
- set_fs(saved_fs);
fp->f_pos = offset;
if (rc < 0)
- SRETURN(-rc);
+ return (-rc);
if (residp) {
*residp = len - rc;
} else {
if (rc != len)
- SRETURN(EIO);
+ return (EIO);
}
- SRETURN(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;
- SENTRY;
ASSERT(vp);
ASSERT(vp->v_file);
rc = filp_close(vp->v_file, 0);
vn_free(vp);
- SRETURN(-rc);
+ return (-rc);
} /* vn_close() */
EXPORT_SYMBOL(vn_close);
-/* vn_seek() does not actually seek it only performs bounds checking on the
+/*
+ * vn_seek() does not actually seek it only performs bounds checking on the
* proposed seek. We perform minimal checking and allow vn_rdwr() to catch
- * anything more serious. */
+ * anything more serious.
+ */
int
vn_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, void *ct)
{
}
EXPORT_SYMBOL(vn_seek);
-#ifdef HAVE_KERN_PATH_LOCKED
-/* 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 path parent;
- struct inode *inode = NULL;
- int rc = 0;
- SENTRY;
-
- 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])
- SGOTO(slashes, rc = 0);
-
- inode = dentry->d_inode;
- if (!inode)
- SGOTO(slashes, rc = 0);
-
- if (inode)
- ihold(inode);
-
- rc = vfs_unlink(parent.dentry->d_inode, dentry);
-exit1:
- dput(dentry);
- } else {
- return (-rc);
- }
-
- spl_inode_unlock(parent.dentry->d_inode);
- if (inode)
- iput(inode); /* truncate the inode here */
-
- path_put(&parent);
- SRETURN(-rc);
-
-slashes:
- rc = !dentry->d_inode ? -ENOENT :
- S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
- SGOTO(exit1, rc);
-} /* vn_remove() */
-EXPORT_SYMBOL(vn_remove);
-
-/* 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 path old_parent, new_parent;
- int rc = 0;
- SENTRY;
-
- old_dentry = spl_kern_path_locked(oldname, &old_parent);
- if (IS_ERR(old_dentry))
- SGOTO(exit, rc = PTR_ERR(old_dentry));
-
- spl_inode_unlock(old_parent.dentry->d_inode);
-
- new_dentry = spl_kern_path_locked(newname, &new_parent);
- if (IS_ERR(new_dentry))
- SGOTO(exit2, rc = PTR_ERR(new_dentry));
-
- spl_inode_unlock(new_parent.dentry->d_inode);
-
- rc = -EXDEV;
- if (old_parent.mnt != new_parent.mnt)
- SGOTO(exit3, rc);
-
- 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)
- SGOTO(exit4, rc);
-
- /* target should not be an ancestor of source */
- rc = -ENOTEMPTY;
- if (new_dentry == trap)
- SGOTO(exit4, rc);
-
- /* source must exist */
- rc = -ENOENT;
- if (!old_dentry->d_inode)
- SGOTO(exit4, rc);
-
- /* 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])
- SGOTO(exit4, rc);
- if (new_dentry->d_name.name[new_dentry->d_name.len])
- SGOTO(exit4, rc);
- }
-
-#ifdef HAVE_4ARGS_VFS_RENAME
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry);
-#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 */
-exit4:
- unlock_rename(new_dir, old_dir);
-exit3:
- dput(new_dentry);
- path_put(&new_parent);
-exit2:
- dput(old_dentry);
- path_put(&old_parent);
-exit:
- SRETURN(-rc);
-}
-EXPORT_SYMBOL(vn_rename);
-
-#else
-static struct dentry *
-vn_lookup_hash(struct nameidata *nd)
-{
- return lookup_one_len((const char *)nd->last.name,
- nd->nd_dentry, nd->last.len);
-} /* lookup_hash() */
-
-static void
-vn_path_release(struct nameidata *nd)
-{
- dput(nd->nd_dentry);
- mntput(nd->nd_mnt);
-}
-
-/* Modified do_unlinkat() from linux/fs/namei.c, only uses exported symbols */
-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;
- SENTRY;
-
- ASSERT(seg == UIO_SYSSPACE);
- ASSERT(flags == RMFILE);
-
- rc = spl_kern_path_parent(path, &nd);
- if (rc)
- SGOTO(exit, rc);
-
- rc = -EISDIR;
- if (nd.last_type != LAST_NORM)
- SGOTO(exit1, rc);
-
- spl_inode_lock_nested(nd.nd_dentry->d_inode, I_MUTEX_PARENT);
- 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])
- SGOTO(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);
-#else
- rc = vfs_unlink(nd.nd_dentry->d_inode, dentry, nd.nd_mnt);
-#endif /* HAVE_2ARGS_VFS_UNLINK */
-exit2:
- dput(dentry);
- }
-
- spl_inode_unlock(nd.nd_dentry->d_inode);
- if (inode)
- iput(inode); /* truncate the inode here */
-exit1:
- vn_path_release(&nd);
-exit:
- SRETURN(-rc);
-
-slashes:
- rc = !dentry->d_inode ? -ENOENT :
- S_ISDIR(dentry->d_inode->i_mode) ? -EISDIR : -ENOTDIR;
- SGOTO(exit2, rc);
-} /* vn_remove() */
-EXPORT_SYMBOL(vn_remove);
-
-/* Modified do_rename() from linux/fs/namei.c, only uses exported symbols */
-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;
- SENTRY;
-
- rc = spl_kern_path_parent(oldname, &oldnd);
- if (rc)
- SGOTO(exit, rc);
-
- rc = spl_kern_path_parent(newname, &newnd);
- if (rc)
- SGOTO(exit1, rc);
-
- rc = -EXDEV;
- if (oldnd.nd_mnt != newnd.nd_mnt)
- SGOTO(exit2, rc);
-
- old_dir = oldnd.nd_dentry;
- rc = -EBUSY;
- if (oldnd.last_type != LAST_NORM)
- SGOTO(exit2, rc);
-
- new_dir = newnd.nd_dentry;
- if (newnd.last_type != LAST_NORM)
- SGOTO(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))
- SGOTO(exit3, rc);
-
- /* source must exist */
- rc = -ENOENT;
- if (!old_dentry->d_inode)
- SGOTO(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])
- SGOTO(exit4, rc);
- if (newnd.last.name[newnd.last.len])
- SGOTO(exit4, rc);
- }
-
- /* source should not be ancestor of target */
- rc = -EINVAL;
- if (old_dentry == trap)
- SGOTO(exit4, rc);
-
- new_dentry = vn_lookup_hash(&newnd);
- rc = PTR_ERR(new_dentry);
- if (IS_ERR(new_dentry))
- SGOTO(exit4, rc);
-
- /* target should not be an ancestor of source */
- rc = -ENOTEMPTY;
- if (new_dentry == trap)
- SGOTO(exit5, rc);
-
-#ifdef HAVE_4ARGS_VFS_RENAME
- rc = vfs_rename(old_dir->d_inode, old_dentry,
- new_dir->d_inode, new_dentry);
-#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);
-exit4:
- dput(old_dentry);
-exit3:
- unlock_rename(new_dir, old_dir);
-exit2:
- vn_path_release(&newnd);
-exit1:
- vn_path_release(&oldnd);
-exit:
- SRETURN(-rc);
-}
-EXPORT_SYMBOL(vn_rename);
-#endif /* HAVE_KERN_PATH_LOCKED */
-
int
vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4)
{
struct file *fp;
struct kstat stat;
int rc;
- SENTRY;
ASSERT(vp);
ASSERT(vp->v_file);
fp = vp->v_file;
- rc = vfs_getattr(fp->f_vfsmnt, fp->f_dentry, &stat);
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&fp->f_path, &stat, STATX_BASIC_STATS,
+ AT_STATX_SYNC_AS_STAT);
+#elif defined(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)
- SRETURN(-rc);
-
- 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_fsid = 0;
- vap->va_nodeid = stat.ino;
- vap->va_nlink = stat.nlink;
- vap->va_size = stat.size;
- 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_nblocks = stat.blocks;
-
- SRETURN(0);
+ return (-rc);
+
+ vap->va_type = vn_mode_to_vtype(stat.mode);
+ vap->va_mode = stat.mode;
+ 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_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_nblocks = stat.blocks;
+
+ return (0);
}
EXPORT_SYMBOL(vn_getattr);
-int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4)
+int
+vn_fsync(vnode_t *vp, int flags, void *x3, void *x4)
{
int datasync = 0;
- SENTRY;
+ int error;
+ int fstrans;
ASSERT(vp);
ASSERT(vp->v_file);
if (flags & FDSYNC)
datasync = 1;
- SRETURN(-spl_filp_fsync(vp->v_file, 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_pf_fstrans_check();
+ if (fstrans)
+ current->flags &= ~(__SPL_PF_FSTRANS);
+
+ error = -spl_filp_fsync(vp->v_file, datasync);
+ if (fstrans)
+ current->flags |= __SPL_PF_FSTRANS;
+
+ return (error);
} /* vn_fsync() */
EXPORT_SYMBOL(vn_fsync);
offset_t offset, void *x6, void *x7)
{
int error = EOPNOTSUPP;
- SENTRY;
+#ifdef FALLOC_FL_PUNCH_HOLE
+ int fstrans;
+#endif
if (cmd != F_FREESP || bfp->l_whence != 0)
- SRETURN(EOPNOTSUPP);
+ return (EOPNOTSUPP);
ASSERT(vp);
ASSERT(vp->v_file);
ASSERT(bfp->l_start >= 0 && bfp->l_len > 0);
#ifdef FALLOC_FL_PUNCH_HOLE
+ /*
+ * 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_pf_fstrans_check();
+ if (fstrans)
+ current->flags &= ~(__SPL_PF_FSTRANS);
+
/*
* 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 (fstrans)
+ current->flags |= __SPL_PF_FSTRANS;
+
if (error == 0)
- SRETURN(0);
+ return (0);
#endif
#ifdef HAVE_INODE_TRUNCATE_RANGE
if (end % PAGE_SIZE != 0) {
end &= ~(off_t)(PAGE_SIZE - 1);
if (end <= bfp->l_start)
- SRETURN(0);
+ return (0);
}
--end;
vp->v_file->f_dentry->d_inode,
bfp->l_start, end
);
- SRETURN(0);
+ return (0);
}
#endif
- SRETURN(error);
+ 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));
+ file_t *fp;
- list_for_each_entry(fp, &vn_file_list, f_list) {
- if (fd == fp->f_fd && fp->f_task == current) {
+ list_for_each_entry(fp, &vn_file_list, f_list) {
+ if (fd == fp->f_fd && fp->f_task == task) {
ASSERT(atomic_read(&fp->f_ref) != 0);
- return fp;
+ return (fp);
}
}
- return NULL;
+ return (NULL);
} /* file_find() */
file_t *
vn_getf(int fd)
{
- struct kstat stat;
+ struct kstat stat;
struct file *lfp;
file_t *fp;
vnode_t *vp;
int rc = 0;
- SENTRY;
+
+ 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) {
+ lfp = fget(fd);
+ fput(fp->f_file);
+ /*
+ * areleasef() can cause us to see a stale reference when
+ * userspace has reused a file descriptor before areleasef()
+ * has run. fput() the stale reference and replace it. We
+ * retain the original reference count such that the concurrent
+ * areleasef() will decrement its reference and terminate.
+ */
+ if (lfp != fp->f_file) {
+ fp->f_file = lfp;
+ fp->f_vnode->v_file = lfp;
+ }
atomic_inc(&fp->f_ref);
spin_unlock(&vn_file_lock);
- SRETURN(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)
- SGOTO(out, rc);
+ goto out;
mutex_enter(&fp->f_lock);
lfp = fget(fd);
if (lfp == NULL)
- SGOTO(out_mutex, rc);
+ goto out_mutex;
vp = vn_alloc(KM_SLEEP);
if (vp == NULL)
- SGOTO(out_fget, rc);
+ goto out_fget;
- if (vfs_getattr(lfp->f_vfsmnt, lfp->f_dentry, &stat))
- SGOTO(out_vnode, rc);
+#if defined(HAVE_4ARGS_VFS_GETATTR)
+ rc = vfs_getattr(&lfp->f_path, &stat, STATX_TYPE,
+ AT_STATX_SYNC_AS_STAT);
+#elif defined(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_mode_to_vtype(stat.mode);
spin_unlock(&vn_file_lock);
mutex_exit(&fp->f_lock);
- SRETURN(fp);
+ return (fp);
out_vnode:
vn_free(vp);
mutex_exit(&fp->f_lock);
kmem_cache_free(vn_file_cache, fp);
out:
- SRETURN(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;
- SENTRY;
+ 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);
- SEXIT;
return;
}
- list_del(&fp->f_list);
+ list_del(&fp->f_list);
releasef_locked(fp);
}
spin_unlock(&vn_file_lock);
-
- SEXIT;
- return;
} /* releasef() */
-EXPORT_SYMBOL(releasef);
+EXPORT_SYMBOL(areleasef);
-#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)
+
+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 path old_pwd;
-# ifdef HAVE_FS_STRUCT_SPINLOCK
+#ifdef HAVE_FS_STRUCT_SPINLOCK
spin_lock(&fs->lock);
old_pwd = fs->pwd;
fs->pwd = *path;
path_get(path);
spin_unlock(&fs->lock);
-# else
+#else
write_lock(&fs->lock);
old_pwd = fs->pwd;
fs->pwd = *path;
path_get(path);
write_unlock(&fs->lock);
-# endif /* HAVE_FS_STRUCT_SPINLOCK */
+#endif /* HAVE_FS_STRUCT_SPINLOCK */
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)
-{
- 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);
- }
-}
-# endif /* HAVE_2ARGS_SET_FS_PWD */
-#endif /* HAVE_SET_FS_PWD */
int
vn_set_pwd(const char *filename)
{
-#if defined(HAVE_2ARGS_SET_FS_PWD) && defined(HAVE_USER_PATH_DIR)
- struct path path;
-#else
- struct nameidata nd;
-#endif /* HAVE_2ARGS_SET_FS_PWD */
- mm_segment_t saved_fs;
- int rc;
- SENTRY;
-
- /*
- * 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());
-
-#ifdef HAVE_2ARGS_SET_FS_PWD
-# ifdef HAVE_USER_PATH_DIR
- rc = user_path_dir(filename, &path);
- if (rc)
- SGOTO(out, rc);
-
- rc = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
- if (rc)
- SGOTO(dput_and_out, rc);
-
- set_fs_pwd(current->fs, &path);
-
-dput_and_out:
- path_put(&path);
-# else
- rc = __user_walk(filename,
- LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
- if (rc)
- SGOTO(out, rc);
-
- rc = vfs_permission(&nd, MAY_EXEC);
- if (rc)
- SGOTO(dput_and_out, rc);
+ struct path path;
+ mm_segment_t saved_fs;
+ int rc;
- set_fs_pwd(current->fs, &nd.path);
+ /*
+ * 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());
-dput_and_out:
- path_put(&nd.path);
-# endif /* HAVE_USER_PATH_DIR */
-#else
- rc = __user_walk(filename,
- LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
- if (rc)
- SGOTO(out, rc);
+ rc = user_path_dir(filename, &path);
+ if (rc)
+ goto out;
- rc = vfs_permission(&nd, MAY_EXEC);
- if (rc)
- SGOTO(dput_and_out, rc);
+ rc = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
+ if (rc)
+ goto dput_and_out;
- set_fs_pwd(current->fs, nd.nd_mnt, nd.nd_dentry);
+ vn_set_fs_pwd(current->fs, &path);
dput_and_out:
- vn_path_release(&nd);
-#endif /* HAVE_2ARGS_SET_FS_PWD */
+ path_put(&path);
out:
set_fs(saved_fs);
- SRETURN(-rc);
+ return (-rc);
} /* vn_set_pwd() */
EXPORT_SYMBOL(vn_set_pwd);
file_t *fp = buf;
atomic_set(&fp->f_ref, 0);
- mutex_init(&fp->f_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&fp->f_lock, NULL, MUTEX_DEFAULT, NULL);
INIT_LIST_HEAD(&fp->f_list);
- return (0);
-} /* file_cache_constructor() */
+ return (0);
+} /* vn_file_cache_constructor() */
static void
vn_file_cache_destructor(void *buf, void *cdrarg)
mutex_destroy(&fp->f_lock);
} /* vn_file_cache_destructor() */
-int spl_vn_init_kallsyms_lookup(void)
-{
-#ifdef HAVE_KERN_PATH_PARENT_HEADER
-#ifndef HAVE_KERN_PATH_PARENT_SYMBOL
- kern_path_parent_fn = (kern_path_parent_t)
- spl_kallsyms_lookup_name("kern_path_parent");
- if (!kern_path_parent_fn) {
- printk(KERN_ERR "Error: Unknown symbol kern_path_parent\n");
- return -EFAULT;
- }
-#endif /* HAVE_KERN_PATH_PARENT_SYMBOL */
-#endif /* HAVE_KERN_PATH_PARENT_HEADER */
-
-#ifdef HAVE_KERN_PATH_LOCKED
- kern_path_locked_fn = (kern_path_locked_t)
- spl_kallsyms_lookup_name("kern_path_locked");
- if (!kern_path_locked_fn) {
- printk(KERN_ERR "Error: Unknown symbol kern_path_locked\n");
- return -EFAULT;
- }
-#endif
-
- return (0);
-}
-
int
spl_vn_init(void)
{
- SENTRY;
vn_cache = kmem_cache_create("spl_vn_cache",
- sizeof(struct vnode), 64,
- vn_cache_constructor,
- vn_cache_destructor,
- NULL, NULL, NULL, KMC_KMEM);
+ sizeof (struct vnode), 64, vn_cache_constructor,
+ vn_cache_destructor, NULL, NULL, NULL, 0);
vn_file_cache = kmem_cache_create("spl_vn_file_cache",
- sizeof(file_t), 64,
- vn_file_cache_constructor,
- vn_file_cache_destructor,
- NULL, NULL, NULL, KMC_KMEM);
- SRETURN(0);
-} /* vn_init() */
+ sizeof (file_t), 64, vn_file_cache_constructor,
+ vn_file_cache_destructor, NULL, NULL, NULL, 0);
+
+ return (0);
+} /* spl_vn_init() */
void
spl_vn_fini(void)
{
- file_t *fp, *next_fp;
+ file_t *fp, *next_fp;
int leaked = 0;
- SENTRY;
spin_lock(&vn_file_lock);
- list_for_each_entry_safe(fp, next_fp, &vn_file_list, f_list) {
- list_del(&fp->f_list);
+ list_for_each_entry_safe(fp, next_fp, &vn_file_list, f_list) {
+ list_del(&fp->f_list);
releasef_locked(fp);
leaked++;
}
spin_unlock(&vn_file_lock);
if (leaked > 0)
- SWARN("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);
-
- SEXIT;
- return;
-} /* vn_fini() */
+} /* spl_vn_fini() */
projects / mirror_spl.git / blobdiff