struct inode *ip;
VERIFY3S(zfs_inode_alloc(sb, &ip), ==, 0);
- ip->i_version = 1;
+ inode_set_iversion(ip, 1);
return (ip);
}
static void
zpl_inode_destroy(struct inode *ip)
{
- ASSERT(atomic_read(&ip->i_count) == 0);
+ ASSERT(atomic_read(&ip->i_count) == 0);
zfs_inode_destroy(ip);
}
+/*
+ * Called from __mark_inode_dirty() to reflect that something in the
+ * inode has changed. We use it to ensure the znode system attributes
+ * are always strictly update to date with respect to the inode.
+ */
+#ifdef HAVE_DIRTY_INODE_WITH_FLAGS
+static void
+zpl_dirty_inode(struct inode *ip, int flags)
+{
+ fstrans_cookie_t cookie;
+
+ cookie = spl_fstrans_mark();
+ zfs_dirty_inode(ip, flags);
+ spl_fstrans_unmark(cookie);
+}
+#else
+static void
+zpl_dirty_inode(struct inode *ip)
+{
+ fstrans_cookie_t cookie;
+
+ cookie = spl_fstrans_mark();
+ zfs_dirty_inode(ip, 0);
+ spl_fstrans_unmark(cookie);
+}
+#endif /* HAVE_DIRTY_INODE_WITH_FLAGS */
+
/*
* When ->drop_inode() is called its return value indicates if the
* inode should be evicted from the inode cache. If the inode is
* This elaborate mechanism was replaced by ->evict_inode() which
* does the job of both ->delete_inode() and ->clear_inode(). It
* will be called exactly once, and when it returns the inode must
- * be in a state where it can simply be freed. The ->evict_inode()
- * callback must minimally truncate the inode pages, and call
- * end_writeback() to complete all outstanding writeback for the
- * inode. After this is complete evict inode can cleanup any
+ * be in a state where it can simply be freed.i
+ *
+ * The ->evict_inode() callback must minimally truncate the inode pages,
+ * and call clear_inode(). For 2.6.35 and later kernels this will
+ * simply update the inode state, with the sync occurring before the
+ * truncate in evict(). For earlier kernels clear_inode() maps to
+ * end_writeback() which is responsible for completing all outstanding
+ * write back. In either case, once this is done it is safe to cleanup
+ * any remaining inode specific data via zfs_inactive().
* remaining filesystem specific data.
*/
#ifdef HAVE_EVICT_INODE
static void
zpl_evict_inode(struct inode *ip)
{
+ fstrans_cookie_t cookie;
+
+ cookie = spl_fstrans_mark();
truncate_setsize(ip, 0);
- end_writeback(ip);
+ clear_inode(ip);
zfs_inactive(ip);
+ spl_fstrans_unmark(cookie);
}
#else
+static void
+zpl_drop_inode(struct inode *ip)
+{
+ generic_delete_inode(ip);
+}
+
static void
zpl_clear_inode(struct inode *ip)
{
+ fstrans_cookie_t cookie;
+
+ cookie = spl_fstrans_mark();
zfs_inactive(ip);
+ spl_fstrans_unmark(cookie);
}
static void
truncate_setsize(ip, 0);
clear_inode(ip);
}
-
#endif /* HAVE_EVICT_INODE */
static void
zpl_put_super(struct super_block *sb)
{
+ fstrans_cookie_t cookie;
int error;
+ cookie = spl_fstrans_mark();
error = -zfs_umount(sb);
+ spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
}
static int
zpl_sync_fs(struct super_block *sb, int wait)
{
+ fstrans_cookie_t cookie;
cred_t *cr = CRED();
int error;
crhold(cr);
+ cookie = spl_fstrans_mark();
error = -zfs_sync(sb, wait, cr);
+ spl_fstrans_unmark(cookie);
crfree(cr);
ASSERT3S(error, <=, 0);
static int
zpl_statfs(struct dentry *dentry, struct kstatfs *statp)
{
+ fstrans_cookie_t cookie;
int error;
+ cookie = spl_fstrans_mark();
error = -zfs_statvfs(dentry, statp);
+ spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
return (error);
static int
zpl_remount_fs(struct super_block *sb, int *flags, char *data)
{
+ zfs_mnt_t zm = { .mnt_osname = NULL, .mnt_data = data };
+ fstrans_cookie_t cookie;
int error;
- error = -zfs_remount(sb, flags, data);
+
+ cookie = spl_fstrans_mark();
+ error = -zfs_remount(sb, flags, &zm);
+ spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
return (error);
}
-static void
-zpl_umount_begin(struct super_block *sb)
+static int
+__zpl_show_options(struct seq_file *seq, zfsvfs_t *zfsvfs)
{
- zfs_sb_t *zsb = sb->s_fs_info;
- int count;
-
- /*
- * Best effort to unmount snapshots in .zfs/snapshot/. Normally this
- * isn't required because snapshots have the MNT_SHRINKABLE flag set.
- */
- if (zsb->z_ctldir)
- (void) zfsctl_unmount_snapshots(zsb, MNT_FORCE, &count);
+ seq_printf(seq, ",%s",
+ zfsvfs->z_flags & ZSB_XATTR ? "xattr" : "noxattr");
+
+#ifdef CONFIG_FS_POSIX_ACL
+ switch (zfsvfs->z_acl_type) {
+ case ZFS_ACLTYPE_POSIXACL:
+ seq_puts(seq, ",posixacl");
+ break;
+ default:
+ seq_puts(seq, ",noacl");
+ break;
+ }
+#endif /* CONFIG_FS_POSIX_ACL */
+
+ return (0);
}
-/*
- * The Linux VFS automatically handles the following flags:
- * MNT_NOSUID, MNT_NODEV, MNT_NOEXEC, MNT_NOATIME, MNT_READONLY
- */
#ifdef HAVE_SHOW_OPTIONS_WITH_DENTRY
static int
zpl_show_options(struct seq_file *seq, struct dentry *root)
{
- zfs_sb_t *zsb = root->d_sb->s_fs_info;
-
- seq_printf(seq, ",%s", zsb->z_flags & ZSB_XATTR ? "xattr" : "noxattr");
-
- return (0);
+ return (__zpl_show_options(seq, root->d_sb->s_fs_info));
}
#else
static int
zpl_show_options(struct seq_file *seq, struct vfsmount *vfsp)
{
- zfs_sb_t *zsb = vfsp->mnt_sb->s_fs_info;
-
- seq_printf(seq, ",%s", zsb->z_flags & ZSB_XATTR ? "xattr" : "noxattr");
-
- return (0);
+ return (__zpl_show_options(seq, vfsp->mnt_sb->s_fs_info));
}
#endif /* HAVE_SHOW_OPTIONS_WITH_DENTRY */
static int
zpl_fill_super(struct super_block *sb, void *data, int silent)
{
+ zfs_mnt_t *zm = (zfs_mnt_t *)data;
+ fstrans_cookie_t cookie;
int error;
- error = -zfs_domount(sb, data, silent);
+ cookie = spl_fstrans_mark();
+ error = -zfs_domount(sb, zm, silent);
+ spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
return (error);
}
-#ifdef HAVE_MOUNT_NODEV
+static int
+zpl_test_super(struct super_block *s, void *data)
+{
+ zfsvfs_t *zfsvfs = s->s_fs_info;
+ objset_t *os = data;
+
+ if (zfsvfs == NULL)
+ return (0);
+
+ return (os == zfsvfs->z_os);
+}
+
+static struct super_block *
+zpl_mount_impl(struct file_system_type *fs_type, int flags, zfs_mnt_t *zm)
+{
+ struct super_block *s;
+ objset_t *os;
+ int err;
+
+ err = dmu_objset_hold(zm->mnt_osname, FTAG, &os);
+ if (err)
+ return (ERR_PTR(-err));
+
+ s = zpl_sget(fs_type, zpl_test_super, set_anon_super, flags, os);
+ dmu_objset_rele(os, FTAG);
+ if (IS_ERR(s))
+ return (ERR_CAST(s));
+
+ if (s->s_root == NULL) {
+ err = zpl_fill_super(s, zm, flags & SB_SILENT ? 1 : 0);
+ if (err) {
+ deactivate_locked_super(s);
+ return (ERR_PTR(err));
+ }
+ s->s_flags |= SB_ACTIVE;
+ } else if ((flags ^ s->s_flags) & SB_RDONLY) {
+ deactivate_locked_super(s);
+ return (ERR_PTR(-EBUSY));
+ }
+
+ return (s);
+}
+
+#ifdef HAVE_FST_MOUNT
static struct dentry *
zpl_mount(struct file_system_type *fs_type, int flags,
const char *osname, void *data)
{
- zpl_mount_data_t zmd = { osname, data };
+ zfs_mnt_t zm = { .mnt_osname = osname, .mnt_data = data };
+
+ struct super_block *sb = zpl_mount_impl(fs_type, flags, &zm);
+ if (IS_ERR(sb))
+ return (ERR_CAST(sb));
- return mount_nodev(fs_type, flags, &zmd, zpl_fill_super);
+ return (dget(sb->s_root));
}
#else
static int
zpl_get_sb(struct file_system_type *fs_type, int flags,
const char *osname, void *data, struct vfsmount *mnt)
{
- zpl_mount_data_t zmd = { osname, data };
+ zfs_mnt_t zm = { .mnt_osname = osname, .mnt_data = data };
+
+ struct super_block *sb = zpl_mount_impl(fs_type, flags, &zm);
+ if (IS_ERR(sb))
+ return (PTR_ERR(sb));
+
+ (void) simple_set_mnt(mnt, sb);
- return get_sb_nodev(fs_type, flags, &zmd, zpl_fill_super, mnt);
+ return (0);
}
-#endif /* HAVE_MOUNT_NODEV */
+#endif /* HAVE_FST_MOUNT */
static void
zpl_kill_sb(struct super_block *sb)
{
zfs_preumount(sb);
kill_anon_super(sb);
-}
-
-#ifdef HAVE_SHRINK
-/*
- * Linux 3.1 - 3.x API
- *
- * The Linux 3.1 API introduced per-sb cache shrinkers to replace the
- * global ones. This allows us a mechanism to cleanly target a specific
- * zfs file system when the dnode and inode caches grow too large.
- *
- * In addition, the 3.0 kernel added the iterate_supers_type() helper
- * function which is used to safely walk all of the zfs file systems.
- */
-static void
-zpl_prune_sb(struct super_block *sb, void *arg)
-{
- int objects = 0;
- int error;
- error = -zfs_sb_prune(sb, *(unsigned long *)arg, &objects);
- ASSERT3S(error, <=, 0);
-
- return;
+#ifdef HAVE_S_INSTANCES_LIST_HEAD
+ sb->s_instances.next = &(zpl_fs_type.fs_supers);
+#endif /* HAVE_S_INSTANCES_LIST_HEAD */
}
void
-zpl_prune_sbs(int64_t bytes_to_scan, void *private)
-{
- unsigned long nr_to_scan = (bytes_to_scan / sizeof(znode_t));
-
- iterate_supers_type(&zpl_fs_type, zpl_prune_sb, &nr_to_scan);
- kmem_reap();
-}
-#else
-/*
- * Linux 2.6.x - 3.0 API
- *
- * These are best effort interfaces are provided by the SPL to induce
- * the Linux VM subsystem to reclaim a fraction of the both dnode and
- * inode caches. Ideally, we want to just target the zfs file systems
- * however our only option is to reclaim from them all.
- */
-void
-zpl_prune_sbs(int64_t bytes_to_scan, void *private)
+zpl_prune_sb(int64_t nr_to_scan, void *arg)
{
- unsigned long nr_to_scan = (bytes_to_scan / sizeof(znode_t));
+ struct super_block *sb = (struct super_block *)arg;
+ int objects = 0;
- shrink_dcache_memory(nr_to_scan, GFP_KERNEL);
- shrink_icache_memory(nr_to_scan, GFP_KERNEL);
- kmem_reap();
+ (void) -zfs_prune(sb, nr_to_scan, &objects);
}
-#endif /* HAVE_SHRINK */
#ifdef HAVE_NR_CACHED_OBJECTS
static int
zpl_nr_cached_objects(struct super_block *sb)
{
- zfs_sb_t *zsb = sb->s_fs_info;
- int nr;
-
- mutex_enter(&zsb->z_znodes_lock);
- nr = zsb->z_nr_znodes;
- mutex_exit(&zsb->z_znodes_lock);
-
- return (nr);
+ return (0);
}
#endif /* HAVE_NR_CACHED_OBJECTS */
#ifdef HAVE_FREE_CACHED_OBJECTS
-/*
- * Attempt to evict some meta data from the cache. The ARC operates in
- * terms of bytes while the Linux VFS uses objects. Now because this is
- * just a best effort eviction and the exact values aren't critical so we
- * extrapolate from an object count to a byte size using the znode_t size.
- */
static void
zpl_free_cached_objects(struct super_block *sb, int nr_to_scan)
{
- arc_adjust_meta(nr_to_scan * sizeof(znode_t), B_FALSE);
+ /* noop */
}
#endif /* HAVE_FREE_CACHED_OBJECTS */
const struct super_operations zpl_super_operations = {
.alloc_inode = zpl_inode_alloc,
.destroy_inode = zpl_inode_destroy,
- .dirty_inode = NULL,
+ .dirty_inode = zpl_dirty_inode,
.write_inode = NULL,
- .drop_inode = NULL,
#ifdef HAVE_EVICT_INODE
.evict_inode = zpl_evict_inode,
#else
+ .drop_inode = zpl_drop_inode,
.clear_inode = zpl_clear_inode,
.delete_inode = zpl_inode_delete,
#endif /* HAVE_EVICT_INODE */
.put_super = zpl_put_super,
- .write_super = NULL,
.sync_fs = zpl_sync_fs,
.statfs = zpl_statfs,
.remount_fs = zpl_remount_fs,
- .umount_begin = zpl_umount_begin,
.show_options = zpl_show_options,
.show_stats = NULL,
#ifdef HAVE_NR_CACHED_OBJECTS
struct file_system_type zpl_fs_type = {
.owner = THIS_MODULE,
.name = ZFS_DRIVER,
-#ifdef HAVE_MOUNT_NODEV
+#ifdef HAVE_FST_MOUNT
.mount = zpl_mount,
#else
.get_sb = zpl_get_sb,
-#endif /* HAVE_MOUNT_NODEV */
+#endif /* HAVE_FST_MOUNT */
.kill_sb = zpl_kill_sb,
};
projects / mirror_zfs.git / blobdiff