4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
26 #include <sys/zfs_vfsops.h>
27 #include <sys/zfs_vnops.h>
28 #include <sys/zfs_znode.h>
29 #include <sys/zfs_ctldir.h>
34 zpl_inode_alloc(struct super_block
*sb
)
38 VERIFY3S(zfs_inode_alloc(sb
, &ip
), ==, 0);
45 zpl_inode_destroy(struct inode
*ip
)
47 ASSERT(atomic_read(&ip
->i_count
) == 0);
48 zfs_inode_destroy(ip
);
52 * Called from __mark_inode_dirty() to reflect that something in the
53 * inode has changed. We use it to ensure the znode system attributes
54 * are always strictly update to date with respect to the inode.
56 #ifdef HAVE_DIRTY_INODE_WITH_FLAGS
58 zpl_dirty_inode(struct inode
*ip
, int flags
)
60 fstrans_cookie_t cookie
;
62 cookie
= spl_fstrans_mark();
63 zfs_dirty_inode(ip
, flags
);
64 spl_fstrans_unmark(cookie
);
68 zpl_dirty_inode(struct inode
*ip
)
70 fstrans_cookie_t cookie
;
72 cookie
= spl_fstrans_mark();
73 zfs_dirty_inode(ip
, 0);
74 spl_fstrans_unmark(cookie
);
76 #endif /* HAVE_DIRTY_INODE_WITH_FLAGS */
79 * When ->drop_inode() is called its return value indicates if the
80 * inode should be evicted from the inode cache. If the inode is
81 * unhashed and has no links the default policy is to evict it
84 * Prior to 2.6.36 this eviction was accomplished by the vfs calling
85 * ->delete_inode(). It was ->delete_inode()'s responsibility to
86 * truncate the inode pages and call clear_inode(). The call to
87 * clear_inode() synchronously invalidates all the buffers and
88 * calls ->clear_inode(). It was ->clear_inode()'s responsibility
89 * to cleanup and filesystem specific data before freeing the inode.
91 * This elaborate mechanism was replaced by ->evict_inode() which
92 * does the job of both ->delete_inode() and ->clear_inode(). It
93 * will be called exactly once, and when it returns the inode must
94 * be in a state where it can simply be freed.i
96 * The ->evict_inode() callback must minimally truncate the inode pages,
97 * and call clear_inode(). For 2.6.35 and later kernels this will
98 * simply update the inode state, with the sync occurring before the
99 * truncate in evict(). For earlier kernels clear_inode() maps to
100 * end_writeback() which is responsible for completing all outstanding
101 * write back. In either case, once this is done it is safe to cleanup
102 * any remaining inode specific data via zfs_inactive().
103 * remaining filesystem specific data.
105 #ifdef HAVE_EVICT_INODE
107 zpl_evict_inode(struct inode
*ip
)
109 fstrans_cookie_t cookie
;
111 cookie
= spl_fstrans_mark();
112 truncate_setsize(ip
, 0);
115 spl_fstrans_unmark(cookie
);
121 zpl_drop_inode(struct inode
*ip
)
123 generic_delete_inode(ip
);
127 zpl_clear_inode(struct inode
*ip
)
129 fstrans_cookie_t cookie
;
131 cookie
= spl_fstrans_mark();
133 spl_fstrans_unmark(cookie
);
137 zpl_inode_delete(struct inode
*ip
)
139 truncate_setsize(ip
, 0);
142 #endif /* HAVE_EVICT_INODE */
145 zpl_put_super(struct super_block
*sb
)
147 fstrans_cookie_t cookie
;
150 cookie
= spl_fstrans_mark();
151 error
= -zfs_umount(sb
);
152 spl_fstrans_unmark(cookie
);
153 ASSERT3S(error
, <=, 0);
157 zpl_sync_fs(struct super_block
*sb
, int wait
)
159 fstrans_cookie_t cookie
;
164 cookie
= spl_fstrans_mark();
165 error
= -zfs_sync(sb
, wait
, cr
);
166 spl_fstrans_unmark(cookie
);
168 ASSERT3S(error
, <=, 0);
174 zpl_statfs(struct dentry
*dentry
, struct kstatfs
*statp
)
176 fstrans_cookie_t cookie
;
179 cookie
= spl_fstrans_mark();
180 error
= -zfs_statvfs(dentry
, statp
);
181 spl_fstrans_unmark(cookie
);
182 ASSERT3S(error
, <=, 0);
188 zpl_remount_fs(struct super_block
*sb
, int *flags
, char *data
)
190 fstrans_cookie_t cookie
;
193 cookie
= spl_fstrans_mark();
194 error
= -zfs_remount(sb
, flags
, data
);
195 spl_fstrans_unmark(cookie
);
196 ASSERT3S(error
, <=, 0);
202 * ZFS specific features must be explicitly handled here, the VFS will
203 * automatically handled the following generic functionality.
217 __zpl_show_options(struct seq_file
*seq
, zfs_sb_t
*zsb
)
219 seq_printf(seq
, ",%s", zsb
->z_flags
& ZSB_XATTR
? "xattr" : "noxattr");
221 #ifdef CONFIG_FS_POSIX_ACL
222 switch (zsb
->z_acl_type
) {
223 case ZFS_ACLTYPE_POSIXACL
:
224 seq_puts(seq
, ",posixacl");
227 seq_puts(seq
, ",noacl");
230 #endif /* CONFIG_FS_POSIX_ACL */
235 #ifdef HAVE_SHOW_OPTIONS_WITH_DENTRY
237 zpl_show_options(struct seq_file
*seq
, struct dentry
*root
)
239 return (__zpl_show_options(seq
, root
->d_sb
->s_fs_info
));
243 zpl_show_options(struct seq_file
*seq
, struct vfsmount
*vfsp
)
245 return (__zpl_show_options(seq
, vfsp
->mnt_sb
->s_fs_info
));
247 #endif /* HAVE_SHOW_OPTIONS_WITH_DENTRY */
250 zpl_fill_super(struct super_block
*sb
, void *data
, int silent
)
252 fstrans_cookie_t cookie
;
255 cookie
= spl_fstrans_mark();
256 error
= -zfs_domount(sb
, data
, silent
);
257 spl_fstrans_unmark(cookie
);
258 ASSERT3S(error
, <=, 0);
263 #ifdef HAVE_MOUNT_NODEV
264 static struct dentry
*
265 zpl_mount(struct file_system_type
*fs_type
, int flags
,
266 const char *osname
, void *data
)
268 zpl_mount_data_t zmd
= { osname
, data
};
270 return (mount_nodev(fs_type
, flags
, &zmd
, zpl_fill_super
));
274 zpl_get_sb(struct file_system_type
*fs_type
, int flags
,
275 const char *osname
, void *data
, struct vfsmount
*mnt
)
277 zpl_mount_data_t zmd
= { osname
, data
};
279 return (get_sb_nodev(fs_type
, flags
, &zmd
, zpl_fill_super
, mnt
));
281 #endif /* HAVE_MOUNT_NODEV */
284 zpl_kill_sb(struct super_block
*sb
)
289 #ifdef HAVE_S_INSTANCES_LIST_HEAD
290 sb
->s_instances
.next
= &(zpl_fs_type
.fs_supers
);
291 #endif /* HAVE_S_INSTANCES_LIST_HEAD */
295 zpl_prune_sb(int64_t nr_to_scan
, void *arg
)
297 struct super_block
*sb
= (struct super_block
*)arg
;
300 (void) -zfs_sb_prune(sb
, nr_to_scan
, &objects
);
303 #ifdef HAVE_NR_CACHED_OBJECTS
305 zpl_nr_cached_objects(struct super_block
*sb
)
307 zfs_sb_t
*zsb
= sb
->s_fs_info
;
310 mutex_enter(&zsb
->z_znodes_lock
);
311 nr
= zsb
->z_nr_znodes
;
312 mutex_exit(&zsb
->z_znodes_lock
);
316 #endif /* HAVE_NR_CACHED_OBJECTS */
318 #ifdef HAVE_FREE_CACHED_OBJECTS
320 * Attempt to evict some meta data from the cache. The ARC operates in
321 * terms of bytes while the Linux VFS uses objects. Now because this is
322 * just a best effort eviction and the exact values aren't critical so we
323 * extrapolate from an object count to a byte size using the znode_t size.
326 zpl_free_cached_objects(struct super_block
*sb
, int nr_to_scan
)
330 #endif /* HAVE_FREE_CACHED_OBJECTS */
332 const struct super_operations zpl_super_operations
= {
333 .alloc_inode
= zpl_inode_alloc
,
334 .destroy_inode
= zpl_inode_destroy
,
335 .dirty_inode
= zpl_dirty_inode
,
337 #ifdef HAVE_EVICT_INODE
338 .evict_inode
= zpl_evict_inode
,
340 .drop_inode
= zpl_drop_inode
,
341 .clear_inode
= zpl_clear_inode
,
342 .delete_inode
= zpl_inode_delete
,
343 #endif /* HAVE_EVICT_INODE */
344 .put_super
= zpl_put_super
,
345 .sync_fs
= zpl_sync_fs
,
346 .statfs
= zpl_statfs
,
347 .remount_fs
= zpl_remount_fs
,
348 .show_options
= zpl_show_options
,
350 #ifdef HAVE_NR_CACHED_OBJECTS
351 .nr_cached_objects
= zpl_nr_cached_objects
,
352 #endif /* HAVE_NR_CACHED_OBJECTS */
353 #ifdef HAVE_FREE_CACHED_OBJECTS
354 .free_cached_objects
= zpl_free_cached_objects
,
355 #endif /* HAVE_FREE_CACHED_OBJECTS */
358 struct file_system_type zpl_fs_type
= {
359 .owner
= THIS_MODULE
,
361 #ifdef HAVE_MOUNT_NODEV
364 .get_sb
= zpl_get_sb
,
365 #endif /* HAVE_MOUNT_NODEV */
366 .kill_sb
= zpl_kill_sb
,