2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
4 * Trivial changes by Alan Cox to add the LFS fixes
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/vmalloc.h>
17 #include <linux/time.h>
18 #include <linux/uaccess.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/backing-dev.h>
25 #include <linux/buffer_head.h>
26 #include <linux/exportfs.h>
27 #include <linux/quotaops.h>
28 #include <linux/vfs.h>
29 #include <linux/mount.h>
30 #include <linux/namei.h>
31 #include <linux/crc32.h>
32 #include <linux/seq_file.h>
34 struct file_system_type reiserfs_fs_type
;
36 static const char reiserfs_3_5_magic_string
[] = REISERFS_SUPER_MAGIC_STRING
;
37 static const char reiserfs_3_6_magic_string
[] = REISER2FS_SUPER_MAGIC_STRING
;
38 static const char reiserfs_jr_magic_string
[] = REISER2FS_JR_SUPER_MAGIC_STRING
;
40 int is_reiserfs_3_5(struct reiserfs_super_block
*rs
)
42 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_5_magic_string
,
43 strlen(reiserfs_3_5_magic_string
));
46 int is_reiserfs_3_6(struct reiserfs_super_block
*rs
)
48 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_6_magic_string
,
49 strlen(reiserfs_3_6_magic_string
));
52 int is_reiserfs_jr(struct reiserfs_super_block
*rs
)
54 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_jr_magic_string
,
55 strlen(reiserfs_jr_magic_string
));
58 static int is_any_reiserfs_magic_string(struct reiserfs_super_block
*rs
)
60 return (is_reiserfs_3_5(rs
) || is_reiserfs_3_6(rs
) ||
64 static int reiserfs_remount(struct super_block
*s
, int *flags
, char *data
);
65 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
);
67 static int reiserfs_sync_fs(struct super_block
*s
, int wait
)
69 struct reiserfs_transaction_handle th
;
72 * Writeback quota in non-journalled quota case - journalled quota has
75 dquot_writeback_dquots(s
, -1);
76 reiserfs_write_lock(s
);
77 if (!journal_begin(&th
, s
, 1))
78 if (!journal_end_sync(&th
))
79 reiserfs_flush_old_commits(s
);
80 reiserfs_write_unlock(s
);
84 static void flush_old_commits(struct work_struct
*work
)
86 struct reiserfs_sb_info
*sbi
;
87 struct super_block
*s
;
89 sbi
= container_of(work
, struct reiserfs_sb_info
, old_work
.work
);
90 s
= sbi
->s_journal
->j_work_sb
;
93 * We need s_umount for protecting quota writeback. We have to use
94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work
95 * to complete with s_umount held.
97 if (!down_read_trylock(&s
->s_umount
)) {
98 /* Requeue work if we are not cancelling it */
99 spin_lock(&sbi
->old_work_lock
);
100 if (sbi
->work_queued
== 1)
101 queue_delayed_work(system_long_wq
, &sbi
->old_work
, HZ
);
102 spin_unlock(&sbi
->old_work_lock
);
105 spin_lock(&sbi
->old_work_lock
);
106 /* Avoid clobbering the cancel state... */
107 if (sbi
->work_queued
== 1)
108 sbi
->work_queued
= 0;
109 spin_unlock(&sbi
->old_work_lock
);
111 reiserfs_sync_fs(s
, 1);
112 up_read(&s
->s_umount
);
115 void reiserfs_schedule_old_flush(struct super_block
*s
)
117 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
121 * Avoid scheduling flush when sb is being shut down. It can race
122 * with journal shutdown and free still queued delayed work.
124 if (sb_rdonly(s
) || !(s
->s_flags
& SB_ACTIVE
))
127 spin_lock(&sbi
->old_work_lock
);
128 if (!sbi
->work_queued
) {
129 delay
= msecs_to_jiffies(dirty_writeback_interval
* 10);
130 queue_delayed_work(system_long_wq
, &sbi
->old_work
, delay
);
131 sbi
->work_queued
= 1;
133 spin_unlock(&sbi
->old_work_lock
);
136 void reiserfs_cancel_old_flush(struct super_block
*s
)
138 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
140 spin_lock(&sbi
->old_work_lock
);
141 /* Make sure no new flushes will be queued */
142 sbi
->work_queued
= 2;
143 spin_unlock(&sbi
->old_work_lock
);
144 cancel_delayed_work_sync(&REISERFS_SB(s
)->old_work
);
147 static int reiserfs_freeze(struct super_block
*s
)
149 struct reiserfs_transaction_handle th
;
151 reiserfs_cancel_old_flush(s
);
153 reiserfs_write_lock(s
);
155 int err
= journal_begin(&th
, s
, 1);
157 reiserfs_block_writes(&th
);
159 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
161 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
162 reiserfs_block_writes(&th
);
163 journal_end_sync(&th
);
166 reiserfs_write_unlock(s
);
170 static int reiserfs_unfreeze(struct super_block
*s
)
172 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
174 reiserfs_allow_writes(s
);
175 spin_lock(&sbi
->old_work_lock
);
176 /* Allow old_work to run again */
177 sbi
->work_queued
= 0;
178 spin_unlock(&sbi
->old_work_lock
);
182 extern const struct in_core_key MAX_IN_CORE_KEY
;
185 * this is used to delete "save link" when there are no items of a
186 * file it points to. It can either happen if unlink is completed but
187 * "save unlink" removal, or if file has both unlink and truncate
188 * pending and as unlink completes first (because key of "save link"
189 * protecting unlink is bigger that a key lf "save link" which
190 * protects truncate), so there left no items to make truncate
193 static int remove_save_link_only(struct super_block
*s
,
194 struct reiserfs_key
*key
, int oid_free
)
196 struct reiserfs_transaction_handle th
;
199 /* we are going to do one balancing */
200 err
= journal_begin(&th
, s
, JOURNAL_PER_BALANCE_CNT
);
204 reiserfs_delete_solid_item(&th
, NULL
, key
);
206 /* removals are protected by direct items */
207 reiserfs_release_objectid(&th
, le32_to_cpu(key
->k_objectid
));
209 return journal_end(&th
);
213 static int reiserfs_quota_on_mount(struct super_block
*, int);
217 * Look for uncompleted unlinks and truncates and complete them
219 * Called with superblock write locked. If quotas are enabled, we have to
220 * release/retake lest we call dquot_quota_on_mount(), proceed to
221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
222 * cpu worklets to complete flush_async_commits() that in turn wait for the
223 * superblock write lock.
225 static int finish_unfinished(struct super_block
*s
)
227 INITIALIZE_PATH(path
);
228 struct cpu_key max_cpu_key
, obj_key
;
229 struct reiserfs_key save_link_key
, last_inode_key
;
231 struct item_head
*ih
;
232 struct buffer_head
*bh
;
241 int quota_enabled
[REISERFS_MAXQUOTAS
];
244 /* compose key to look for "save" links */
245 max_cpu_key
.version
= KEY_FORMAT_3_5
;
246 max_cpu_key
.on_disk_key
.k_dir_id
= ~0U;
247 max_cpu_key
.on_disk_key
.k_objectid
= ~0U;
248 set_cpu_key_k_offset(&max_cpu_key
, ~0U);
249 max_cpu_key
.key_length
= 3;
251 memset(&last_inode_key
, 0, sizeof(last_inode_key
));
254 /* Needed for iput() to work correctly and not trash data */
255 if (s
->s_flags
& SB_ACTIVE
) {
259 s
->s_flags
|= SB_ACTIVE
;
261 /* Turn on quotas so that they are updated correctly */
262 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
263 quota_enabled
[i
] = 1;
264 if (REISERFS_SB(s
)->s_qf_names
[i
]) {
267 if (sb_has_quota_active(s
, i
)) {
268 quota_enabled
[i
] = 0;
271 reiserfs_write_unlock(s
);
272 ret
= reiserfs_quota_on_mount(s
, i
);
273 reiserfs_write_lock(s
);
275 reiserfs_warning(s
, "reiserfs-2500",
276 "cannot turn on journaled "
277 "quota: error %d", ret
);
283 REISERFS_SB(s
)->s_is_unlinked_ok
= 1;
286 retval
= search_item(s
, &max_cpu_key
, &path
);
287 if (retval
!= ITEM_NOT_FOUND
) {
288 reiserfs_error(s
, "vs-2140",
289 "search_by_key returned %d", retval
);
293 bh
= get_last_bh(&path
);
294 item_pos
= get_item_pos(&path
);
295 if (item_pos
!= B_NR_ITEMS(bh
)) {
296 reiserfs_warning(s
, "vs-2060",
297 "wrong position found");
301 ih
= item_head(bh
, item_pos
);
303 if (le32_to_cpu(ih
->ih_key
.k_dir_id
) != MAX_KEY_OBJECTID
)
304 /* there are no "save" links anymore */
307 save_link_key
= ih
->ih_key
;
308 if (is_indirect_le_ih(ih
))
313 /* reiserfs_iget needs k_dirid and k_objectid only */
314 item
= ih_item_body(bh
, ih
);
315 obj_key
.on_disk_key
.k_dir_id
= le32_to_cpu(*(__le32
*) item
);
316 obj_key
.on_disk_key
.k_objectid
=
317 le32_to_cpu(ih
->ih_key
.k_objectid
);
318 obj_key
.on_disk_key
.k_offset
= 0;
319 obj_key
.on_disk_key
.k_type
= 0;
323 inode
= reiserfs_iget(s
, &obj_key
);
324 if (IS_ERR_OR_NULL(inode
)) {
326 * the unlink almost completed, it just did not
327 * manage to remove "save" link and release objectid
329 reiserfs_warning(s
, "vs-2180", "iget failed for %K",
331 retval
= remove_save_link_only(s
, &save_link_key
, 1);
335 if (!truncate
&& inode
->i_nlink
) {
336 /* file is not unlinked */
337 reiserfs_warning(s
, "vs-2185",
338 "file %K is not unlinked",
340 retval
= remove_save_link_only(s
, &save_link_key
, 0);
343 depth
= reiserfs_write_unlock_nested(inode
->i_sb
);
344 dquot_initialize(inode
);
345 reiserfs_write_lock_nested(inode
->i_sb
, depth
);
347 if (truncate
&& S_ISDIR(inode
->i_mode
)) {
349 * We got a truncate request for a dir which
350 * is impossible. The only imaginable way is to
351 * execute unfinished truncate request then boot
352 * into old kernel, remove the file and create dir
355 reiserfs_warning(s
, "green-2101",
356 "impossible truncate on a "
357 "directory %k. Please report",
359 retval
= remove_save_link_only(s
, &save_link_key
, 0);
366 REISERFS_I(inode
)->i_flags
|=
367 i_link_saved_truncate_mask
;
369 * not completed truncate found. New size was
370 * committed together with "save" link
372 reiserfs_info(s
, "Truncating %k to %lld ..",
373 INODE_PKEY(inode
), inode
->i_size
);
375 /* don't update modification time */
376 reiserfs_truncate_file(inode
, 0);
378 retval
= remove_save_link(inode
, truncate
);
380 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
381 /* not completed unlink (rmdir) found */
382 reiserfs_info(s
, "Removing %k..", INODE_PKEY(inode
));
383 if (memcmp(&last_inode_key
, INODE_PKEY(inode
),
384 sizeof(last_inode_key
))){
385 last_inode_key
= *INODE_PKEY(inode
);
386 /* removal gets completed in iput */
389 reiserfs_warning(s
, "super-2189", "Dead loop "
390 "in finish_unfinished "
391 "detected, just remove "
393 retval
= remove_save_link_only(s
,
402 REISERFS_SB(s
)->s_is_unlinked_ok
= 0;
405 /* Turn quotas off */
406 reiserfs_write_unlock(s
);
407 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
408 if (sb_dqopt(s
)->files
[i
] && quota_enabled
[i
])
409 dquot_quota_off(s
, i
);
411 reiserfs_write_lock(s
);
413 /* Restore the flag back */
414 s
->s_flags
&= ~SB_ACTIVE
;
418 reiserfs_info(s
, "There were %d uncompleted unlinks/truncates. "
419 "Completed\n", done
);
424 * to protect file being unlinked from getting lost we "safe" link files
425 * being unlinked. This link will be deleted in the same transaction with last
426 * item of file. mounting the filesystem we scan all these links and remove
427 * files which almost got lost
429 void add_save_link(struct reiserfs_transaction_handle
*th
,
430 struct inode
*inode
, int truncate
)
432 INITIALIZE_PATH(path
);
438 BUG_ON(!th
->t_trans_id
);
440 /* file can only get one "save link" of each kind */
442 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
),
443 "saved link already exists for truncated inode %lx",
446 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
),
447 "saved link already exists for unlinked inode %lx",
450 /* setup key of "save" link */
451 key
.version
= KEY_FORMAT_3_5
;
452 key
.on_disk_key
.k_dir_id
= MAX_KEY_OBJECTID
;
453 key
.on_disk_key
.k_objectid
= inode
->i_ino
;
455 /* unlink, rmdir, rename */
456 set_cpu_key_k_offset(&key
, 1 + inode
->i_sb
->s_blocksize
);
457 set_cpu_key_k_type(&key
, TYPE_DIRECT
);
459 /* item head of "safe" link */
460 make_le_item_head(&ih
, &key
, key
.version
,
461 1 + inode
->i_sb
->s_blocksize
, TYPE_DIRECT
,
462 4 /*length */ , 0xffff /*free space */ );
465 if (S_ISDIR(inode
->i_mode
))
466 reiserfs_warning(inode
->i_sb
, "green-2102",
467 "Adding a truncate savelink for "
468 "a directory %k! Please report",
470 set_cpu_key_k_offset(&key
, 1);
471 set_cpu_key_k_type(&key
, TYPE_INDIRECT
);
473 /* item head of "safe" link */
474 make_le_item_head(&ih
, &key
, key
.version
, 1, TYPE_INDIRECT
,
475 4 /*length */ , 0 /*free space */ );
479 /* look for its place in the tree */
480 retval
= search_item(inode
->i_sb
, &key
, &path
);
481 if (retval
!= ITEM_NOT_FOUND
) {
482 if (retval
!= -ENOSPC
)
483 reiserfs_error(inode
->i_sb
, "vs-2100",
484 "search_by_key (%K) returned %d", &key
,
490 /* body of "save" link */
491 link
= INODE_PKEY(inode
)->k_dir_id
;
493 /* put "save" link into tree, don't charge quota to anyone */
495 reiserfs_insert_item(th
, &path
, &key
, &ih
, NULL
, (char *)&link
);
497 if (retval
!= -ENOSPC
)
498 reiserfs_error(inode
->i_sb
, "vs-2120",
499 "insert_item returned %d", retval
);
502 REISERFS_I(inode
)->i_flags
|=
503 i_link_saved_truncate_mask
;
505 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
509 /* this opens transaction unlike add_save_link */
510 int remove_save_link(struct inode
*inode
, int truncate
)
512 struct reiserfs_transaction_handle th
;
513 struct reiserfs_key key
;
516 /* we are going to do one balancing only */
517 err
= journal_begin(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
);
521 /* setup key of "save" link */
522 key
.k_dir_id
= cpu_to_le32(MAX_KEY_OBJECTID
);
523 key
.k_objectid
= INODE_PKEY(inode
)->k_objectid
;
525 /* unlink, rmdir, rename */
526 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
,
527 1 + inode
->i_sb
->s_blocksize
);
528 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_DIRECT
);
531 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
, 1);
532 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_INDIRECT
);
536 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
)) ||
538 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
)))
539 /* don't take quota bytes from anywhere */
540 reiserfs_delete_solid_item(&th
, NULL
, &key
);
542 reiserfs_release_objectid(&th
, inode
->i_ino
);
543 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_unlink_mask
;
545 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_truncate_mask
;
547 return journal_end(&th
);
550 static void reiserfs_kill_sb(struct super_block
*s
)
552 if (REISERFS_SB(s
)) {
553 reiserfs_proc_info_done(s
);
555 * Force any pending inode evictions to occur now. Any
556 * inodes to be removed that have extended attributes
557 * associated with them need to clean them up before
558 * we can release the extended attribute root dentries.
559 * shrink_dcache_for_umount will BUG if we don't release
560 * those before it's called so ->put_super is too late.
564 dput(REISERFS_SB(s
)->xattr_root
);
565 REISERFS_SB(s
)->xattr_root
= NULL
;
566 dput(REISERFS_SB(s
)->priv_root
);
567 REISERFS_SB(s
)->priv_root
= NULL
;
574 static int reiserfs_quota_off(struct super_block
*sb
, int type
);
576 static void reiserfs_quota_off_umount(struct super_block
*s
)
580 for (type
= 0; type
< REISERFS_MAXQUOTAS
; type
++)
581 reiserfs_quota_off(s
, type
);
584 static inline void reiserfs_quota_off_umount(struct super_block
*s
)
589 static void reiserfs_put_super(struct super_block
*s
)
591 struct reiserfs_transaction_handle th
;
594 reiserfs_quota_off_umount(s
);
596 reiserfs_write_lock(s
);
599 * change file system state to current state if it was mounted
600 * with read-write permissions
603 if (!journal_begin(&th
, s
, 10)) {
604 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
606 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s
),
607 REISERFS_SB(s
)->s_mount_state
);
608 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
613 * note, journal_release checks for readonly mount, and can
614 * decide not to do a journal_end
616 journal_release(&th
, s
);
618 reiserfs_free_bitmap_cache(s
);
620 brelse(SB_BUFFER_WITH_SB(s
));
624 if (REISERFS_SB(s
)->reserved_blocks
!= 0) {
625 reiserfs_warning(s
, "green-2005", "reserved blocks left %d",
626 REISERFS_SB(s
)->reserved_blocks
);
629 reiserfs_write_unlock(s
);
630 mutex_destroy(&REISERFS_SB(s
)->lock
);
631 destroy_workqueue(REISERFS_SB(s
)->commit_wq
);
636 static struct kmem_cache
*reiserfs_inode_cachep
;
638 static struct inode
*reiserfs_alloc_inode(struct super_block
*sb
)
640 struct reiserfs_inode_info
*ei
;
641 ei
= kmem_cache_alloc(reiserfs_inode_cachep
, GFP_KERNEL
);
644 atomic_set(&ei
->openers
, 0);
645 mutex_init(&ei
->tailpack
);
647 memset(&ei
->i_dquot
, 0, sizeof(ei
->i_dquot
));
650 return &ei
->vfs_inode
;
653 static void reiserfs_free_inode(struct inode
*inode
)
655 kmem_cache_free(reiserfs_inode_cachep
, REISERFS_I(inode
));
658 static void init_once(void *foo
)
660 struct reiserfs_inode_info
*ei
= (struct reiserfs_inode_info
*)foo
;
662 INIT_LIST_HEAD(&ei
->i_prealloc_list
);
663 inode_init_once(&ei
->vfs_inode
);
666 static int __init
init_inodecache(void)
668 reiserfs_inode_cachep
= kmem_cache_create("reiser_inode_cache",
670 reiserfs_inode_info
),
671 0, (SLAB_RECLAIM_ACCOUNT
|
675 if (reiserfs_inode_cachep
== NULL
)
680 static void destroy_inodecache(void)
683 * Make sure all delayed rcu free inodes are flushed before we
687 kmem_cache_destroy(reiserfs_inode_cachep
);
690 /* we don't mark inodes dirty, we just log them */
691 static void reiserfs_dirty_inode(struct inode
*inode
, int flags
)
693 struct reiserfs_transaction_handle th
;
697 if (sb_rdonly(inode
->i_sb
)) {
698 reiserfs_warning(inode
->i_sb
, "clm-6006",
699 "writing inode %lu on readonly FS",
703 reiserfs_write_lock(inode
->i_sb
);
706 * this is really only used for atime updates, so they don't have
707 * to be included in O_SYNC or fsync
709 err
= journal_begin(&th
, inode
->i_sb
, 1);
713 reiserfs_update_sd(&th
, inode
);
717 reiserfs_write_unlock(inode
->i_sb
);
720 static int reiserfs_show_options(struct seq_file
*seq
, struct dentry
*root
)
722 struct super_block
*s
= root
->d_sb
;
723 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
724 long opts
= REISERFS_SB(s
)->s_mount_opt
;
726 if (opts
& (1 << REISERFS_LARGETAIL
))
727 seq_puts(seq
, ",tails=on");
728 else if (!(opts
& (1 << REISERFS_SMALLTAIL
)))
729 seq_puts(seq
, ",notail");
730 /* tails=small is default so we don't show it */
732 if (!(opts
& (1 << REISERFS_BARRIER_FLUSH
)))
733 seq_puts(seq
, ",barrier=none");
734 /* barrier=flush is default so we don't show it */
736 if (opts
& (1 << REISERFS_ERROR_CONTINUE
))
737 seq_puts(seq
, ",errors=continue");
738 else if (opts
& (1 << REISERFS_ERROR_PANIC
))
739 seq_puts(seq
, ",errors=panic");
740 /* errors=ro is default so we don't show it */
742 if (opts
& (1 << REISERFS_DATA_LOG
))
743 seq_puts(seq
, ",data=journal");
744 else if (opts
& (1 << REISERFS_DATA_WRITEBACK
))
745 seq_puts(seq
, ",data=writeback");
746 /* data=ordered is default so we don't show it */
748 if (opts
& (1 << REISERFS_ATTRS
))
749 seq_puts(seq
, ",attrs");
751 if (opts
& (1 << REISERFS_XATTRS_USER
))
752 seq_puts(seq
, ",user_xattr");
754 if (opts
& (1 << REISERFS_EXPOSE_PRIVROOT
))
755 seq_puts(seq
, ",expose_privroot");
757 if (opts
& (1 << REISERFS_POSIXACL
))
758 seq_puts(seq
, ",acl");
760 if (REISERFS_SB(s
)->s_jdev
)
761 seq_show_option(seq
, "jdev", REISERFS_SB(s
)->s_jdev
);
763 if (journal
->j_max_commit_age
!= journal
->j_default_max_commit_age
)
764 seq_printf(seq
, ",commit=%d", journal
->j_max_commit_age
);
767 if (REISERFS_SB(s
)->s_qf_names
[USRQUOTA
])
768 seq_show_option(seq
, "usrjquota",
769 REISERFS_SB(s
)->s_qf_names
[USRQUOTA
]);
770 else if (opts
& (1 << REISERFS_USRQUOTA
))
771 seq_puts(seq
, ",usrquota");
772 if (REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
])
773 seq_show_option(seq
, "grpjquota",
774 REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
]);
775 else if (opts
& (1 << REISERFS_GRPQUOTA
))
776 seq_puts(seq
, ",grpquota");
777 if (REISERFS_SB(s
)->s_jquota_fmt
) {
778 if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_OLD
)
779 seq_puts(seq
, ",jqfmt=vfsold");
780 else if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_V0
)
781 seq_puts(seq
, ",jqfmt=vfsv0");
785 /* Block allocator options */
786 if (opts
& (1 << REISERFS_NO_BORDER
))
787 seq_puts(seq
, ",block-allocator=noborder");
788 if (opts
& (1 << REISERFS_NO_UNHASHED_RELOCATION
))
789 seq_puts(seq
, ",block-allocator=no_unhashed_relocation");
790 if (opts
& (1 << REISERFS_HASHED_RELOCATION
))
791 seq_puts(seq
, ",block-allocator=hashed_relocation");
792 if (opts
& (1 << REISERFS_TEST4
))
793 seq_puts(seq
, ",block-allocator=test4");
794 show_alloc_options(seq
, s
);
799 static ssize_t
reiserfs_quota_write(struct super_block
*, int, const char *,
801 static ssize_t
reiserfs_quota_read(struct super_block
*, int, char *, size_t,
804 static struct dquot
**reiserfs_get_dquots(struct inode
*inode
)
806 return REISERFS_I(inode
)->i_dquot
;
810 static const struct super_operations reiserfs_sops
= {
811 .alloc_inode
= reiserfs_alloc_inode
,
812 .free_inode
= reiserfs_free_inode
,
813 .write_inode
= reiserfs_write_inode
,
814 .dirty_inode
= reiserfs_dirty_inode
,
815 .evict_inode
= reiserfs_evict_inode
,
816 .put_super
= reiserfs_put_super
,
817 .sync_fs
= reiserfs_sync_fs
,
818 .freeze_fs
= reiserfs_freeze
,
819 .unfreeze_fs
= reiserfs_unfreeze
,
820 .statfs
= reiserfs_statfs
,
821 .remount_fs
= reiserfs_remount
,
822 .show_options
= reiserfs_show_options
,
824 .quota_read
= reiserfs_quota_read
,
825 .quota_write
= reiserfs_quota_write
,
826 .get_dquots
= reiserfs_get_dquots
,
831 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
833 static int reiserfs_write_dquot(struct dquot
*);
834 static int reiserfs_acquire_dquot(struct dquot
*);
835 static int reiserfs_release_dquot(struct dquot
*);
836 static int reiserfs_mark_dquot_dirty(struct dquot
*);
837 static int reiserfs_write_info(struct super_block
*, int);
838 static int reiserfs_quota_on(struct super_block
*, int, int, const struct path
*);
840 static const struct dquot_operations reiserfs_quota_operations
= {
841 .write_dquot
= reiserfs_write_dquot
,
842 .acquire_dquot
= reiserfs_acquire_dquot
,
843 .release_dquot
= reiserfs_release_dquot
,
844 .mark_dirty
= reiserfs_mark_dquot_dirty
,
845 .write_info
= reiserfs_write_info
,
846 .alloc_dquot
= dquot_alloc
,
847 .destroy_dquot
= dquot_destroy
,
848 .get_next_id
= dquot_get_next_id
,
851 static const struct quotactl_ops reiserfs_qctl_operations
= {
852 .quota_on
= reiserfs_quota_on
,
853 .quota_off
= reiserfs_quota_off
,
854 .quota_sync
= dquot_quota_sync
,
855 .get_state
= dquot_get_state
,
856 .set_info
= dquot_set_dqinfo
,
857 .get_dqblk
= dquot_get_dqblk
,
858 .set_dqblk
= dquot_set_dqblk
,
862 static const struct export_operations reiserfs_export_ops
= {
863 .encode_fh
= reiserfs_encode_fh
,
864 .fh_to_dentry
= reiserfs_fh_to_dentry
,
865 .fh_to_parent
= reiserfs_fh_to_parent
,
866 .get_parent
= reiserfs_get_parent
,
870 * this struct is used in reiserfs_getopt () for containing the value for
871 * those mount options that have values rather than being toggles.
876 * bitmask which is to set on mount_options bitmask
877 * when this value is found, 0 is no bits are to be changed.
881 * bitmask which is to clear on mount_options bitmask
882 * when this value is found, 0 is no bits are to be changed.
883 * This is applied BEFORE setmask
888 /* Set this bit in arg_required to allow empty arguments */
889 #define REISERFS_OPT_ALLOWEMPTY 31
892 * this struct is used in reiserfs_getopt() for describing the
893 * set of reiserfs mount options
898 /* 0 if argument is not required, not 0 otherwise */
901 /* list of values accepted by an option */
902 const arg_desc_t
*values
;
905 * bitmask which is to set on mount_options bitmask
906 * when this value is found, 0 is no bits are to be changed.
911 * bitmask which is to clear on mount_options bitmask
912 * when this value is found, 0 is no bits are to be changed.
913 * This is applied BEFORE setmask
918 /* possible values for -o data= */
919 static const arg_desc_t logging_mode
[] = {
920 {"ordered", 1 << REISERFS_DATA_ORDERED
,
921 (1 << REISERFS_DATA_LOG
| 1 << REISERFS_DATA_WRITEBACK
)},
922 {"journal", 1 << REISERFS_DATA_LOG
,
923 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_WRITEBACK
)},
924 {"writeback", 1 << REISERFS_DATA_WRITEBACK
,
925 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_LOG
)},
929 /* possible values for -o barrier= */
930 static const arg_desc_t barrier_mode
[] = {
931 {"none", 1 << REISERFS_BARRIER_NONE
, 1 << REISERFS_BARRIER_FLUSH
},
932 {"flush", 1 << REISERFS_BARRIER_FLUSH
, 1 << REISERFS_BARRIER_NONE
},
937 * possible values for "-o block-allocator=" and bits which are to be set in
938 * s_mount_opt of reiserfs specific part of in-core super block
940 static const arg_desc_t balloc
[] = {
941 {"noborder", 1 << REISERFS_NO_BORDER
, 0},
942 {"border", 0, 1 << REISERFS_NO_BORDER
},
943 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION
, 0},
944 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION
, 0},
945 {"test4", 1 << REISERFS_TEST4
, 0},
946 {"notest4", 0, 1 << REISERFS_TEST4
},
950 static const arg_desc_t tails
[] = {
951 {"on", 1 << REISERFS_LARGETAIL
, 1 << REISERFS_SMALLTAIL
},
952 {"off", 0, (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
953 {"small", 1 << REISERFS_SMALLTAIL
, 1 << REISERFS_LARGETAIL
},
957 static const arg_desc_t error_actions
[] = {
958 {"panic", 1 << REISERFS_ERROR_PANIC
,
959 (1 << REISERFS_ERROR_RO
| 1 << REISERFS_ERROR_CONTINUE
)},
960 {"ro-remount", 1 << REISERFS_ERROR_RO
,
961 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_CONTINUE
)},
962 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
963 {"continue", 1 << REISERFS_ERROR_CONTINUE
,
964 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_RO
)},
970 * proceed only one option from a list *cur - string containing of mount
972 * opts - array of options which are accepted
973 * opt_arg - if option is found and requires an argument and if it is specifed
974 * in the input - pointer to the argument is stored here
975 * bit_flags - if option requires to set a certain bit - it is set here
976 * return -1 if unknown option is found, opt->arg_required otherwise
978 static int reiserfs_getopt(struct super_block
*s
, char **cur
, opt_desc_t
* opts
,
979 char **opt_arg
, unsigned long *bit_flags
)
989 const opt_desc_t
*opt
;
990 const arg_desc_t
*arg
;
994 /* assume argument cannot contain commas */
995 *cur
= strchr(p
, ',');
1001 if (!strncmp(p
, "alloc=", 6)) {
1003 * Ugly special case, probably we should redo options
1004 * parser so that it can understand several arguments for
1005 * some options, also so that it can fill several bitfields
1006 * with option values.
1008 if (reiserfs_parse_alloc_options(s
, p
+ 6)) {
1015 /* for every option in the list */
1016 for (opt
= opts
; opt
->option_name
; opt
++) {
1017 if (!strncmp(p
, opt
->option_name
, strlen(opt
->option_name
))) {
1020 (1 << REISERFS_UNSUPPORTED_OPT
))
1021 reiserfs_warning(s
, "super-6500",
1022 "%s not supported.\n",
1025 *bit_flags
&= ~opt
->clrmask
;
1027 (1 << REISERFS_UNSUPPORTED_OPT
))
1028 reiserfs_warning(s
, "super-6501",
1029 "%s not supported.\n",
1032 *bit_flags
|= opt
->setmask
;
1037 if (!opt
->option_name
) {
1038 reiserfs_warning(s
, "super-6502",
1039 "unknown mount option \"%s\"", p
);
1043 p
+= strlen(opt
->option_name
);
1046 if (!opt
->arg_required
) {
1047 reiserfs_warning(s
, "super-6503",
1048 "the option \"%s\" does not "
1049 "require an argument\n",
1056 if (opt
->arg_required
) {
1057 reiserfs_warning(s
, "super-6504",
1058 "the option \"%s\" requires an "
1059 "argument\n", opt
->option_name
);
1064 reiserfs_warning(s
, "super-6505",
1065 "head of option \"%s\" is only correct\n",
1071 * move to the argument, or to next option if argument is not
1076 if (opt
->arg_required
1077 && !(opt
->arg_required
& (1 << REISERFS_OPT_ALLOWEMPTY
))
1079 /* this catches "option=," if not allowed */
1080 reiserfs_warning(s
, "super-6506",
1081 "empty argument for \"%s\"\n",
1087 /* *=NULLopt_arg contains pointer to argument */
1089 return opt
->arg_required
& ~(1 << REISERFS_OPT_ALLOWEMPTY
);
1092 /* values possible for this option are listed in opt->values */
1093 for (arg
= opt
->values
; arg
->value
; arg
++) {
1094 if (!strcmp(p
, arg
->value
)) {
1096 *bit_flags
&= ~arg
->clrmask
;
1097 *bit_flags
|= arg
->setmask
;
1099 return opt
->arg_required
;
1103 reiserfs_warning(s
, "super-6506",
1104 "bad value \"%s\" for option \"%s\"\n", p
,
1109 /* returns 0 if something is wrong in option string, 1 - otherwise */
1110 static int reiserfs_parse_options(struct super_block
*s
,
1112 /* string given via mount's -o */
1116 * after the parsing phase, contains the
1117 * collection of bitflags defining what
1118 * mount options were selected.
1120 unsigned long *mount_options
,
1122 /* strtol-ed from NNN of resize=NNN */
1123 unsigned long *blocks
,
1125 unsigned int *commit_max_age
,
1132 opt_desc_t opts
[] = {
1134 * Compatibility stuff, so that -o notail for old
1137 {"tails",.arg_required
= 't',.values
= tails
},
1138 {"notail",.clrmask
=
1139 (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
1140 {"conv",.setmask
= 1 << REISERFS_CONVERT
},
1141 {"attrs",.setmask
= 1 << REISERFS_ATTRS
},
1142 {"noattrs",.clrmask
= 1 << REISERFS_ATTRS
},
1143 {"expose_privroot", .setmask
= 1 << REISERFS_EXPOSE_PRIVROOT
},
1144 #ifdef CONFIG_REISERFS_FS_XATTR
1145 {"user_xattr",.setmask
= 1 << REISERFS_XATTRS_USER
},
1146 {"nouser_xattr",.clrmask
= 1 << REISERFS_XATTRS_USER
},
1148 {"user_xattr",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1149 {"nouser_xattr",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1151 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1152 {"acl",.setmask
= 1 << REISERFS_POSIXACL
},
1153 {"noacl",.clrmask
= 1 << REISERFS_POSIXACL
},
1155 {"acl",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1156 {"noacl",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1158 {.option_name
= "nolog"},
1159 {"replayonly",.setmask
= 1 << REPLAYONLY
},
1160 {"block-allocator",.arg_required
= 'a',.values
= balloc
},
1161 {"data",.arg_required
= 'd',.values
= logging_mode
},
1162 {"barrier",.arg_required
= 'b',.values
= barrier_mode
},
1163 {"resize",.arg_required
= 'r',.values
= NULL
},
1164 {"jdev",.arg_required
= 'j',.values
= NULL
},
1165 {"nolargeio",.arg_required
= 'w',.values
= NULL
},
1166 {"commit",.arg_required
= 'c',.values
= NULL
},
1167 {"usrquota",.setmask
= 1 << REISERFS_USRQUOTA
},
1168 {"grpquota",.setmask
= 1 << REISERFS_GRPQUOTA
},
1169 {"noquota",.clrmask
= 1 << REISERFS_USRQUOTA
| 1 << REISERFS_GRPQUOTA
},
1170 {"errors",.arg_required
= 'e',.values
= error_actions
},
1171 {"usrjquota",.arg_required
=
1172 'u' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1173 {"grpjquota",.arg_required
=
1174 'g' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1175 {"jqfmt",.arg_required
= 'f',.values
= NULL
},
1176 {.option_name
= NULL
}
1180 if (!options
|| !*options
)
1182 * use default configuration: create tails, journaling on, no
1183 * conversion to newest format
1187 for (pos
= options
; pos
;) {
1188 c
= reiserfs_getopt(s
, &pos
, opts
, &arg
, mount_options
);
1190 /* wrong option is given */
1197 /* "resize=NNN" or "resize=auto" */
1199 if (!strcmp(arg
, "auto")) {
1200 /* From JFS code, to auto-get the size. */
1202 i_size_read(s
->s_bdev
->bd_inode
) >> s
->
1205 *blocks
= simple_strtoul(arg
, &p
, 0);
1207 /* NNN does not look like a number */
1208 reiserfs_warning(s
, "super-6507",
1218 unsigned long val
= simple_strtoul(arg
, &p
, 0);
1219 /* commit=NNN (time in seconds) */
1220 if (*p
!= '\0' || val
>= (unsigned int)-1) {
1221 reiserfs_warning(s
, "super-6508",
1222 "bad value %s for -ocommit\n",
1226 *commit_max_age
= (unsigned int)val
;
1230 reiserfs_warning(s
, "super-6509", "nolargeio option "
1231 "is no longer supported");
1236 if (arg
&& *arg
&& jdev_name
) {
1237 /* Hm, already assigned? */
1239 reiserfs_warning(s
, "super-6510",
1240 "journal device was "
1241 "already specified to "
1242 "be %s", *jdev_name
);
1249 if (c
== 'u' || c
== 'g') {
1250 int qtype
= c
== 'u' ? USRQUOTA
: GRPQUOTA
;
1252 if (sb_any_quota_loaded(s
) &&
1253 (!*arg
!= !REISERFS_SB(s
)->s_qf_names
[qtype
])) {
1254 reiserfs_warning(s
, "super-6511",
1255 "cannot change journaled "
1256 "quota options when quota "
1260 if (*arg
) { /* Some filename specified? */
1261 if (REISERFS_SB(s
)->s_qf_names
[qtype
]
1262 && strcmp(REISERFS_SB(s
)->s_qf_names
[qtype
],
1264 reiserfs_warning(s
, "super-6512",
1266 "already specified.",
1270 if (strchr(arg
, '/')) {
1271 reiserfs_warning(s
, "super-6513",
1272 "quotafile must be "
1273 "on filesystem root.");
1276 qf_names
[qtype
] = kstrdup(arg
, GFP_KERNEL
);
1277 if (!qf_names
[qtype
]) {
1278 reiserfs_warning(s
, "reiserfs-2502",
1279 "not enough memory "
1284 if (qtype
== USRQUOTA
)
1285 *mount_options
|= 1 << REISERFS_USRQUOTA
;
1287 *mount_options
|= 1 << REISERFS_GRPQUOTA
;
1289 if (qf_names
[qtype
] !=
1290 REISERFS_SB(s
)->s_qf_names
[qtype
])
1291 kfree(qf_names
[qtype
]);
1292 qf_names
[qtype
] = NULL
;
1293 if (qtype
== USRQUOTA
)
1294 *mount_options
&= ~(1 << REISERFS_USRQUOTA
);
1296 *mount_options
&= ~(1 << REISERFS_GRPQUOTA
);
1300 if (!strcmp(arg
, "vfsold"))
1301 *qfmt
= QFMT_VFS_OLD
;
1302 else if (!strcmp(arg
, "vfsv0"))
1303 *qfmt
= QFMT_VFS_V0
;
1305 reiserfs_warning(s
, "super-6514",
1306 "unknown quota format "
1310 if (sb_any_quota_loaded(s
) &&
1311 *qfmt
!= REISERFS_SB(s
)->s_jquota_fmt
) {
1312 reiserfs_warning(s
, "super-6515",
1313 "cannot change journaled "
1314 "quota options when quota "
1320 if (c
== 'u' || c
== 'g' || c
== 'f') {
1321 reiserfs_warning(s
, "reiserfs-2503", "journaled "
1322 "quota options not supported.");
1329 if (!REISERFS_SB(s
)->s_jquota_fmt
&& !*qfmt
1330 && (qf_names
[USRQUOTA
] || qf_names
[GRPQUOTA
])) {
1331 reiserfs_warning(s
, "super-6515",
1332 "journaled quota format not specified.");
1335 if ((!(*mount_options
& (1 << REISERFS_USRQUOTA
)) &&
1336 sb_has_quota_loaded(s
, USRQUOTA
)) ||
1337 (!(*mount_options
& (1 << REISERFS_GRPQUOTA
)) &&
1338 sb_has_quota_loaded(s
, GRPQUOTA
))) {
1339 reiserfs_warning(s
, "super-6516", "quota options must "
1340 "be present when quota is turned on.");
1348 static void switch_data_mode(struct super_block
*s
, unsigned long mode
)
1350 REISERFS_SB(s
)->s_mount_opt
&= ~((1 << REISERFS_DATA_LOG
) |
1351 (1 << REISERFS_DATA_ORDERED
) |
1352 (1 << REISERFS_DATA_WRITEBACK
));
1353 REISERFS_SB(s
)->s_mount_opt
|= (1 << mode
);
1356 static void handle_data_mode(struct super_block
*s
, unsigned long mount_options
)
1358 if (mount_options
& (1 << REISERFS_DATA_LOG
)) {
1359 if (!reiserfs_data_log(s
)) {
1360 switch_data_mode(s
, REISERFS_DATA_LOG
);
1361 reiserfs_info(s
, "switching to journaled data mode\n");
1363 } else if (mount_options
& (1 << REISERFS_DATA_ORDERED
)) {
1364 if (!reiserfs_data_ordered(s
)) {
1365 switch_data_mode(s
, REISERFS_DATA_ORDERED
);
1366 reiserfs_info(s
, "switching to ordered data mode\n");
1368 } else if (mount_options
& (1 << REISERFS_DATA_WRITEBACK
)) {
1369 if (!reiserfs_data_writeback(s
)) {
1370 switch_data_mode(s
, REISERFS_DATA_WRITEBACK
);
1371 reiserfs_info(s
, "switching to writeback data mode\n");
1376 static void handle_barrier_mode(struct super_block
*s
, unsigned long bits
)
1378 int flush
= (1 << REISERFS_BARRIER_FLUSH
);
1379 int none
= (1 << REISERFS_BARRIER_NONE
);
1380 int all_barrier
= flush
| none
;
1382 if (bits
& all_barrier
) {
1383 REISERFS_SB(s
)->s_mount_opt
&= ~all_barrier
;
1385 REISERFS_SB(s
)->s_mount_opt
|= flush
;
1386 printk("reiserfs: enabling write barrier flush mode\n");
1387 } else if (bits
& none
) {
1388 REISERFS_SB(s
)->s_mount_opt
|= none
;
1389 printk("reiserfs: write barriers turned off\n");
1394 static void handle_attrs(struct super_block
*s
)
1396 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(s
);
1398 if (reiserfs_attrs(s
)) {
1399 if (old_format_only(s
)) {
1400 reiserfs_warning(s
, "super-6517", "cannot support "
1401 "attributes on 3.5.x disk format");
1402 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1405 if (!(le32_to_cpu(rs
->s_flags
) & reiserfs_attrs_cleared
)) {
1406 reiserfs_warning(s
, "super-6518", "cannot support "
1407 "attributes until flag is set in "
1409 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1415 static void handle_quota_files(struct super_block
*s
, char **qf_names
,
1420 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
1421 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1422 kfree(REISERFS_SB(s
)->s_qf_names
[i
]);
1423 REISERFS_SB(s
)->s_qf_names
[i
] = qf_names
[i
];
1426 REISERFS_SB(s
)->s_jquota_fmt
= *qfmt
;
1430 static int reiserfs_remount(struct super_block
*s
, int *mount_flags
, char *arg
)
1432 struct reiserfs_super_block
*rs
;
1433 struct reiserfs_transaction_handle th
;
1434 unsigned long blocks
;
1435 unsigned long mount_options
= REISERFS_SB(s
)->s_mount_opt
;
1436 unsigned long safe_mask
= 0;
1437 unsigned int commit_max_age
= (unsigned int)-1;
1438 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1441 char *qf_names
[REISERFS_MAXQUOTAS
];
1442 unsigned int qfmt
= 0;
1447 new_opts
= kstrdup(arg
, GFP_KERNEL
);
1448 if (arg
&& !new_opts
)
1452 reiserfs_write_lock(s
);
1455 memcpy(qf_names
, REISERFS_SB(s
)->s_qf_names
, sizeof(qf_names
));
1458 rs
= SB_DISK_SUPER_BLOCK(s
);
1460 if (!reiserfs_parse_options
1461 (s
, arg
, &mount_options
, &blocks
, NULL
, &commit_max_age
,
1464 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++)
1465 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1469 goto out_err_unlock
;
1472 handle_quota_files(s
, qf_names
, &qfmt
);
1477 /* Add options that are safe here */
1478 safe_mask
|= 1 << REISERFS_SMALLTAIL
;
1479 safe_mask
|= 1 << REISERFS_LARGETAIL
;
1480 safe_mask
|= 1 << REISERFS_NO_BORDER
;
1481 safe_mask
|= 1 << REISERFS_NO_UNHASHED_RELOCATION
;
1482 safe_mask
|= 1 << REISERFS_HASHED_RELOCATION
;
1483 safe_mask
|= 1 << REISERFS_TEST4
;
1484 safe_mask
|= 1 << REISERFS_ATTRS
;
1485 safe_mask
|= 1 << REISERFS_XATTRS_USER
;
1486 safe_mask
|= 1 << REISERFS_POSIXACL
;
1487 safe_mask
|= 1 << REISERFS_BARRIER_FLUSH
;
1488 safe_mask
|= 1 << REISERFS_BARRIER_NONE
;
1489 safe_mask
|= 1 << REISERFS_ERROR_RO
;
1490 safe_mask
|= 1 << REISERFS_ERROR_CONTINUE
;
1491 safe_mask
|= 1 << REISERFS_ERROR_PANIC
;
1492 safe_mask
|= 1 << REISERFS_USRQUOTA
;
1493 safe_mask
|= 1 << REISERFS_GRPQUOTA
;
1496 * Update the bitmask, taking care to keep
1497 * the bits we're not allowed to change here
1499 REISERFS_SB(s
)->s_mount_opt
=
1501 s_mount_opt
& ~safe_mask
) | (mount_options
& safe_mask
);
1503 if (commit_max_age
!= 0 && commit_max_age
!= (unsigned int)-1) {
1504 journal
->j_max_commit_age
= commit_max_age
;
1505 journal
->j_max_trans_age
= commit_max_age
;
1506 } else if (commit_max_age
== 0) {
1507 /* 0 means restore defaults. */
1508 journal
->j_max_commit_age
= journal
->j_default_max_commit_age
;
1509 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
1513 err
= reiserfs_resize(s
, blocks
);
1515 goto out_err_unlock
;
1518 if (*mount_flags
& SB_RDONLY
) {
1519 reiserfs_write_unlock(s
);
1520 reiserfs_xattr_init(s
, *mount_flags
);
1521 /* remount read-only */
1523 /* it is read-only already */
1524 goto out_ok_unlocked
;
1526 err
= dquot_suspend(s
, -1);
1530 /* try to remount file system with read-only permissions */
1531 if (sb_umount_state(rs
) == REISERFS_VALID_FS
1532 || REISERFS_SB(s
)->s_mount_state
!= REISERFS_VALID_FS
) {
1533 goto out_ok_unlocked
;
1536 reiserfs_write_lock(s
);
1538 err
= journal_begin(&th
, s
, 10);
1540 goto out_err_unlock
;
1542 /* Mounting a rw partition read-only. */
1543 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1544 set_sb_umount_state(rs
, REISERFS_SB(s
)->s_mount_state
);
1545 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1547 /* remount read-write */
1548 if (!sb_rdonly(s
)) {
1549 reiserfs_write_unlock(s
);
1550 reiserfs_xattr_init(s
, *mount_flags
);
1551 goto out_ok_unlocked
; /* We are read-write already */
1554 if (reiserfs_is_journal_aborted(journal
)) {
1555 err
= journal
->j_errno
;
1556 goto out_err_unlock
;
1559 handle_data_mode(s
, mount_options
);
1560 handle_barrier_mode(s
, mount_options
);
1561 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1563 /* now it is safe to call journal_begin */
1564 s
->s_flags
&= ~SB_RDONLY
;
1565 err
= journal_begin(&th
, s
, 10);
1567 goto out_err_unlock
;
1569 /* Mount a partition which is read-only, read-write */
1570 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1571 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1572 s
->s_flags
&= ~SB_RDONLY
;
1573 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
1574 if (!old_format_only(s
))
1575 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
1576 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1577 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1578 REISERFS_SB(s
)->s_mount_state
= REISERFS_VALID_FS
;
1580 /* this will force a full flush of all journal lists */
1581 SB_JOURNAL(s
)->j_must_wait
= 1;
1582 err
= journal_end(&th
);
1584 goto out_err_unlock
;
1586 reiserfs_write_unlock(s
);
1587 if (!(*mount_flags
& SB_RDONLY
)) {
1588 dquot_resume(s
, -1);
1589 reiserfs_write_lock(s
);
1590 finish_unfinished(s
);
1591 reiserfs_write_unlock(s
);
1592 reiserfs_xattr_init(s
, *mount_flags
);
1599 reiserfs_write_unlock(s
);
1605 static int read_super_block(struct super_block
*s
, int offset
)
1607 struct buffer_head
*bh
;
1608 struct reiserfs_super_block
*rs
;
1611 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1613 reiserfs_warning(s
, "sh-2006",
1614 "bread failed (dev %s, block %lu, size %lu)",
1615 s
->s_id
, offset
/ s
->s_blocksize
,
1620 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1621 if (!is_any_reiserfs_magic_string(rs
)) {
1626 * ok, reiserfs signature (old or new) found in at the given offset
1628 fs_blocksize
= sb_blocksize(rs
);
1630 sb_set_blocksize(s
, fs_blocksize
);
1632 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1634 reiserfs_warning(s
, "sh-2007",
1635 "bread failed (dev %s, block %lu, size %lu)",
1636 s
->s_id
, offset
/ s
->s_blocksize
,
1641 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1642 if (sb_blocksize(rs
) != s
->s_blocksize
) {
1643 reiserfs_warning(s
, "sh-2011", "can't find a reiserfs "
1644 "filesystem on (dev %s, block %llu, size %lu)",
1646 (unsigned long long)bh
->b_blocknr
,
1652 if (rs
->s_v1
.s_root_block
== cpu_to_le32(-1)) {
1654 reiserfs_warning(s
, "super-6519", "Unfinished reiserfsck "
1655 "--rebuild-tree run detected. Please run\n"
1656 "reiserfsck --rebuild-tree and wait for a "
1657 "completion. If that fails\n"
1658 "get newer reiserfsprogs package");
1662 SB_BUFFER_WITH_SB(s
) = bh
;
1663 SB_DISK_SUPER_BLOCK(s
) = rs
;
1666 * magic is of non-standard journal filesystem, look at s_version to
1667 * find which format is in use
1669 if (is_reiserfs_jr(rs
)) {
1670 if (sb_version(rs
) == REISERFS_VERSION_2
)
1671 reiserfs_info(s
, "found reiserfs format \"3.6\""
1672 " with non-standard journal\n");
1673 else if (sb_version(rs
) == REISERFS_VERSION_1
)
1674 reiserfs_info(s
, "found reiserfs format \"3.5\""
1675 " with non-standard journal\n");
1677 reiserfs_warning(s
, "sh-2012", "found unknown "
1678 "format \"%u\" of reiserfs with "
1679 "non-standard magic", sb_version(rs
));
1684 * s_version of standard format may contain incorrect
1685 * information, so we just look at the magic string
1688 "found reiserfs format \"%s\" with standard journal\n",
1689 is_reiserfs_3_5(rs
) ? "3.5" : "3.6");
1691 s
->s_op
= &reiserfs_sops
;
1692 s
->s_export_op
= &reiserfs_export_ops
;
1694 s
->s_qcop
= &reiserfs_qctl_operations
;
1695 s
->dq_op
= &reiserfs_quota_operations
;
1696 s
->s_quota_types
= QTYPE_MASK_USR
| QTYPE_MASK_GRP
;
1700 * new format is limited by the 32 bit wide i_blocks field, want to
1701 * be one full block below that.
1703 s
->s_maxbytes
= (512LL << 32) - s
->s_blocksize
;
1707 /* after journal replay, reread all bitmap and super blocks */
1708 static int reread_meta_blocks(struct super_block
*s
)
1710 ll_rw_block(REQ_OP_READ
, 0, 1, &SB_BUFFER_WITH_SB(s
));
1711 wait_on_buffer(SB_BUFFER_WITH_SB(s
));
1712 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s
))) {
1713 reiserfs_warning(s
, "reiserfs-2504", "error reading the super");
1720 /* hash detection stuff */
1723 * if root directory is empty - we set default - Yura's - hash and
1725 * FIXME: we look for only one name in a directory. If tea and yura
1726 * both have the same value - we ask user to send report to the
1729 static __u32
find_hash_out(struct super_block
*s
)
1732 struct inode
*inode
;
1734 INITIALIZE_PATH(path
);
1735 struct reiserfs_dir_entry de
;
1736 struct reiserfs_de_head
*deh
;
1737 __u32 hash
= DEFAULT_HASH
;
1738 __u32 deh_hashval
, teahash
, r5hash
, yurahash
;
1740 inode
= d_inode(s
->s_root
);
1742 make_cpu_key(&key
, inode
, ~0, TYPE_DIRENTRY
, 3);
1743 retval
= search_by_entry_key(s
, &key
, &path
, &de
);
1744 if (retval
== IO_ERROR
) {
1748 if (retval
== NAME_NOT_FOUND
)
1751 set_de_name_and_namelen(&de
);
1752 deh
= de
.de_deh
+ de
.de_entry_num
;
1754 if (deh_offset(deh
) == DOT_DOT_OFFSET
) {
1755 /* allow override in this case */
1756 if (reiserfs_rupasov_hash(s
))
1758 reiserfs_info(s
, "FS seems to be empty, autodetect is using the default hash\n");
1762 deh_hashval
= GET_HASH_VALUE(deh_offset(deh
));
1763 r5hash
= GET_HASH_VALUE(r5_hash(de
.de_name
, de
.de_namelen
));
1764 teahash
= GET_HASH_VALUE(keyed_hash(de
.de_name
, de
.de_namelen
));
1765 yurahash
= GET_HASH_VALUE(yura_hash(de
.de_name
, de
.de_namelen
));
1767 if ((teahash
== r5hash
&& deh_hashval
== r5hash
) ||
1768 (teahash
== yurahash
&& deh_hashval
== yurahash
) ||
1769 (r5hash
== yurahash
&& deh_hashval
== yurahash
)) {
1770 reiserfs_warning(s
, "reiserfs-2506",
1771 "Unable to automatically detect hash "
1772 "function. Please mount with -o "
1773 "hash={tea,rupasov,r5}");
1778 if (deh_hashval
== yurahash
)
1780 else if (deh_hashval
== teahash
)
1782 else if (deh_hashval
== r5hash
)
1785 reiserfs_warning(s
, "reiserfs-2506",
1786 "Unrecognised hash function");
1794 /* finds out which hash names are sorted with */
1795 static int what_hash(struct super_block
*s
)
1799 code
= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
));
1802 * reiserfs_hash_detect() == true if any of the hash mount options
1803 * were used. We must check them to make sure the user isn't
1804 * using a bad hash value
1806 if (code
== UNSET_HASH
|| reiserfs_hash_detect(s
))
1807 code
= find_hash_out(s
);
1809 if (code
!= UNSET_HASH
&& reiserfs_hash_detect(s
)) {
1811 * detection has found the hash, and we must check against the
1814 if (reiserfs_rupasov_hash(s
) && code
!= YURA_HASH
) {
1815 reiserfs_warning(s
, "reiserfs-2507",
1816 "Error, %s hash detected, "
1817 "unable to force rupasov hash",
1818 reiserfs_hashname(code
));
1820 } else if (reiserfs_tea_hash(s
) && code
!= TEA_HASH
) {
1821 reiserfs_warning(s
, "reiserfs-2508",
1822 "Error, %s hash detected, "
1823 "unable to force tea hash",
1824 reiserfs_hashname(code
));
1826 } else if (reiserfs_r5_hash(s
) && code
!= R5_HASH
) {
1827 reiserfs_warning(s
, "reiserfs-2509",
1828 "Error, %s hash detected, "
1829 "unable to force r5 hash",
1830 reiserfs_hashname(code
));
1835 * find_hash_out was not called or
1836 * could not determine the hash
1838 if (reiserfs_rupasov_hash(s
)) {
1840 } else if (reiserfs_tea_hash(s
)) {
1842 } else if (reiserfs_r5_hash(s
)) {
1848 * if we are mounted RW, and we have a new valid hash code, update
1851 if (code
!= UNSET_HASH
&&
1853 code
!= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
))) {
1854 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
), code
);
1859 /* return pointer to appropriate function */
1860 static hashf_t
hash_function(struct super_block
*s
)
1862 switch (what_hash(s
)) {
1864 reiserfs_info(s
, "Using tea hash to sort names\n");
1867 reiserfs_info(s
, "Using rupasov hash to sort names\n");
1870 reiserfs_info(s
, "Using r5 hash to sort names\n");
1876 /* this is used to set up correct value for old partitions */
1877 static int function2code(hashf_t func
)
1879 if (func
== keyed_hash
)
1881 if (func
== yura_hash
)
1883 if (func
== r5_hash
)
1886 BUG(); /* should never happen */
1891 #define SWARN(silent, s, id, ...) \
1893 reiserfs_warning(s, id, __VA_ARGS__)
1895 static int reiserfs_fill_super(struct super_block
*s
, void *data
, int silent
)
1897 struct inode
*root_inode
;
1898 struct reiserfs_transaction_handle th
;
1900 unsigned long blocks
;
1901 unsigned int commit_max_age
= 0;
1903 struct reiserfs_iget_args args
;
1904 struct reiserfs_super_block
*rs
;
1906 struct reiserfs_sb_info
*sbi
;
1907 int errval
= -EINVAL
;
1908 char *qf_names
[REISERFS_MAXQUOTAS
] = {};
1909 unsigned int qfmt
= 0;
1911 sbi
= kzalloc(sizeof(struct reiserfs_sb_info
), GFP_KERNEL
);
1915 /* Set default values for options: non-aggressive tails, RO on errors */
1916 sbi
->s_mount_opt
|= (1 << REISERFS_SMALLTAIL
);
1917 sbi
->s_mount_opt
|= (1 << REISERFS_ERROR_RO
);
1918 sbi
->s_mount_opt
|= (1 << REISERFS_BARRIER_FLUSH
);
1919 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1920 sbi
->s_alloc_options
.preallocmin
= 0;
1921 /* Preallocate by 16 blocks (17-1) at once */
1922 sbi
->s_alloc_options
.preallocsize
= 17;
1923 /* setup default block allocator options */
1924 reiserfs_init_alloc_options(s
);
1926 spin_lock_init(&sbi
->old_work_lock
);
1927 INIT_DELAYED_WORK(&sbi
->old_work
, flush_old_commits
);
1928 mutex_init(&sbi
->lock
);
1929 sbi
->lock_depth
= -1;
1931 sbi
->commit_wq
= alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM
, 0,
1933 if (!sbi
->commit_wq
) {
1934 SWARN(silent
, s
, "", "Cannot allocate commit workqueue");
1936 goto error_unlocked
;
1940 if (reiserfs_parse_options
1941 (s
, (char *)data
, &sbi
->s_mount_opt
, &blocks
, &jdev_name
,
1942 &commit_max_age
, qf_names
, &qfmt
) == 0) {
1943 goto error_unlocked
;
1945 if (jdev_name
&& jdev_name
[0]) {
1946 sbi
->s_jdev
= kstrdup(jdev_name
, GFP_KERNEL
);
1948 SWARN(silent
, s
, "", "Cannot allocate memory for "
1949 "journal device name");
1954 handle_quota_files(s
, qf_names
, &qfmt
);
1958 SWARN(silent
, s
, "jmacd-7", "resize option for remount only");
1959 goto error_unlocked
;
1963 * try old format (undistributed bitmap, super block in 8-th 1k
1964 * block of a device)
1966 if (!read_super_block(s
, REISERFS_OLD_DISK_OFFSET_IN_BYTES
))
1970 * try new format (64-th 1k block), which can contain reiserfs
1973 else if (read_super_block(s
, REISERFS_DISK_OFFSET_IN_BYTES
)) {
1974 SWARN(silent
, s
, "sh-2021", "can not find reiserfs on %s",
1976 goto error_unlocked
;
1979 rs
= SB_DISK_SUPER_BLOCK(s
);
1981 * Let's do basic sanity check to verify that underlying device is not
1982 * smaller than the filesystem. If the check fails then abort and
1983 * scream, because bad stuff will happen otherwise.
1985 if (s
->s_bdev
&& s
->s_bdev
->bd_inode
1986 && i_size_read(s
->s_bdev
->bd_inode
) <
1987 sb_block_count(rs
) * sb_blocksize(rs
)) {
1988 SWARN(silent
, s
, "", "Filesystem cannot be "
1989 "mounted because it is bigger than the device");
1990 SWARN(silent
, s
, "", "You may need to run fsck "
1991 "or increase size of your LVM partition");
1992 SWARN(silent
, s
, "", "Or may be you forgot to "
1993 "reboot after fdisk when it told you to");
1994 goto error_unlocked
;
1997 sbi
->s_mount_state
= SB_REISERFS_STATE(s
);
1998 sbi
->s_mount_state
= REISERFS_VALID_FS
;
2000 if ((errval
= reiserfs_init_bitmap_cache(s
))) {
2001 SWARN(silent
, s
, "jmacd-8", "unable to read bitmap");
2002 goto error_unlocked
;
2006 #ifdef CONFIG_REISERFS_CHECK
2007 SWARN(silent
, s
, "", "CONFIG_REISERFS_CHECK is set ON");
2008 SWARN(silent
, s
, "", "- it is slow mode for debugging.");
2011 /* make data=ordered the default */
2012 if (!reiserfs_data_log(s
) && !reiserfs_data_ordered(s
) &&
2013 !reiserfs_data_writeback(s
)) {
2014 sbi
->s_mount_opt
|= (1 << REISERFS_DATA_ORDERED
);
2017 if (reiserfs_data_log(s
)) {
2018 reiserfs_info(s
, "using journaled data mode\n");
2019 } else if (reiserfs_data_ordered(s
)) {
2020 reiserfs_info(s
, "using ordered data mode\n");
2022 reiserfs_info(s
, "using writeback data mode\n");
2024 if (reiserfs_barrier_flush(s
)) {
2025 printk("reiserfs: using flush barriers\n");
2028 if (journal_init(s
, jdev_name
, old_format
, commit_max_age
)) {
2029 SWARN(silent
, s
, "sh-2022",
2030 "unable to initialize journal space");
2031 goto error_unlocked
;
2034 * once this is set, journal_release must be called
2035 * if we error out of the mount
2040 if (reread_meta_blocks(s
)) {
2041 SWARN(silent
, s
, "jmacd-9",
2042 "unable to reread meta blocks after journal init");
2043 goto error_unlocked
;
2047 goto error_unlocked
;
2049 if (bdev_read_only(s
->s_bdev
) && !sb_rdonly(s
)) {
2050 SWARN(silent
, s
, "clm-7000",
2051 "Detected readonly device, marking FS readonly");
2052 s
->s_flags
|= SB_RDONLY
;
2054 args
.objectid
= REISERFS_ROOT_OBJECTID
;
2055 args
.dirid
= REISERFS_ROOT_PARENT_OBJECTID
;
2057 iget5_locked(s
, REISERFS_ROOT_OBJECTID
, reiserfs_find_actor
,
2058 reiserfs_init_locked_inode
, (void *)&args
);
2060 SWARN(silent
, s
, "jmacd-10", "get root inode failed");
2061 goto error_unlocked
;
2065 * This path assumed to be called with the BKL in the old times.
2066 * Now we have inherited the big reiserfs lock from it and many
2067 * reiserfs helpers called in the mount path and elsewhere require
2068 * this lock to be held even if it's not always necessary. Let's be
2069 * conservative and hold it early. The window can be reduced after
2070 * careful review of the code.
2072 reiserfs_write_lock(s
);
2074 if (root_inode
->i_state
& I_NEW
) {
2075 reiserfs_read_locked_inode(root_inode
, &args
);
2076 unlock_new_inode(root_inode
);
2079 s
->s_root
= d_make_root(root_inode
);
2082 /* define and initialize hash function */
2083 sbi
->s_hash_function
= hash_function(s
);
2084 if (sbi
->s_hash_function
== NULL
) {
2090 if (is_reiserfs_3_5(rs
)
2091 || (is_reiserfs_jr(rs
) && SB_VERSION(s
) == REISERFS_VERSION_1
))
2092 set_bit(REISERFS_3_5
, &sbi
->s_properties
);
2093 else if (old_format
)
2094 set_bit(REISERFS_OLD_FORMAT
, &sbi
->s_properties
);
2096 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2098 if (!sb_rdonly(s
)) {
2100 errval
= journal_begin(&th
, s
, 1);
2106 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
2108 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
2109 set_sb_fs_state(rs
, 0);
2112 * Clear out s_bmap_nr if it would wrap. We can handle this
2113 * case, but older revisions can't. This will cause the
2114 * file system to fail mount on those older implementations,
2115 * avoiding corruption. -jeffm
2117 if (bmap_would_wrap(reiserfs_bmap_count(s
)) &&
2118 sb_bmap_nr(rs
) != 0) {
2119 reiserfs_warning(s
, "super-2030", "This file system "
2120 "claims to use %u bitmap blocks in "
2121 "its super block, but requires %u. "
2122 "Clearing to zero.", sb_bmap_nr(rs
),
2123 reiserfs_bmap_count(s
));
2125 set_sb_bmap_nr(rs
, 0);
2128 if (old_format_only(s
)) {
2130 * filesystem of format 3.5 either with standard
2131 * or non-standard journal
2133 if (convert_reiserfs(s
)) {
2134 /* and -o conv is given */
2137 "converting 3.5 filesystem to the 3.6 format");
2139 if (is_reiserfs_3_5(rs
))
2141 * put magic string of 3.6 format.
2142 * 2.2 will not be able to
2143 * mount this filesystem anymore
2145 memcpy(rs
->s_v1
.s_magic
,
2146 reiserfs_3_6_magic_string
,
2148 (reiserfs_3_6_magic_string
));
2150 set_sb_version(rs
, REISERFS_VERSION_2
);
2151 reiserfs_convert_objectid_map_v1(s
);
2152 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2153 clear_bit(REISERFS_3_5
, &sbi
->s_properties
);
2154 } else if (!silent
) {
2155 reiserfs_info(s
, "using 3.5.x disk format\n");
2158 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
2161 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
2162 errval
= journal_end(&th
);
2169 reiserfs_write_unlock(s
);
2170 if ((errval
= reiserfs_lookup_privroot(s
)) ||
2171 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
2174 goto error_unlocked
;
2176 reiserfs_write_lock(s
);
2179 * look for files which were to be removed in previous session
2181 finish_unfinished(s
);
2183 if (old_format_only(s
) && !silent
) {
2184 reiserfs_info(s
, "using 3.5.x disk format\n");
2187 reiserfs_write_unlock(s
);
2188 if ((errval
= reiserfs_lookup_privroot(s
)) ||
2189 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
2192 goto error_unlocked
;
2194 reiserfs_write_lock(s
);
2197 * mark hash in super block: it could be unset. overwrite should be ok
2199 set_sb_hash_function_code(rs
, function2code(sbi
->s_hash_function
));
2203 reiserfs_proc_info_init(s
);
2205 init_waitqueue_head(&(sbi
->s_wait
));
2206 spin_lock_init(&sbi
->bitmap_lock
);
2208 reiserfs_write_unlock(s
);
2213 reiserfs_write_unlock(s
);
2216 /* kill the commit thread, free journal ram */
2218 reiserfs_write_lock(s
);
2219 journal_release_error(NULL
, s
);
2220 reiserfs_write_unlock(s
);
2224 destroy_workqueue(sbi
->commit_wq
);
2226 reiserfs_cancel_old_flush(s
);
2228 reiserfs_free_bitmap_cache(s
);
2229 if (SB_BUFFER_WITH_SB(s
))
2230 brelse(SB_BUFFER_WITH_SB(s
));
2234 for (j
= 0; j
< REISERFS_MAXQUOTAS
; j
++)
2240 s
->s_fs_info
= NULL
;
2244 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2246 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(dentry
->d_sb
);
2248 buf
->f_namelen
= (REISERFS_MAX_NAME(s
->s_blocksize
));
2249 buf
->f_bfree
= sb_free_blocks(rs
);
2250 buf
->f_bavail
= buf
->f_bfree
;
2251 buf
->f_blocks
= sb_block_count(rs
) - sb_bmap_nr(rs
) - 1;
2252 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
2253 /* changed to accommodate gcc folks. */
2254 buf
->f_type
= REISERFS_SUPER_MAGIC
;
2255 buf
->f_fsid
.val
[0] = (u32
)crc32_le(0, rs
->s_uuid
, sizeof(rs
->s_uuid
)/2);
2256 buf
->f_fsid
.val
[1] = (u32
)crc32_le(0, rs
->s_uuid
+ sizeof(rs
->s_uuid
)/2,
2257 sizeof(rs
->s_uuid
)/2);
2263 static int reiserfs_write_dquot(struct dquot
*dquot
)
2265 struct reiserfs_transaction_handle th
;
2269 reiserfs_write_lock(dquot
->dq_sb
);
2271 journal_begin(&th
, dquot
->dq_sb
,
2272 REISERFS_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2275 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2276 ret
= dquot_commit(dquot
);
2277 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2278 err
= journal_end(&th
);
2282 reiserfs_write_unlock(dquot
->dq_sb
);
2286 static int reiserfs_acquire_dquot(struct dquot
*dquot
)
2288 struct reiserfs_transaction_handle th
;
2292 reiserfs_write_lock(dquot
->dq_sb
);
2294 journal_begin(&th
, dquot
->dq_sb
,
2295 REISERFS_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2298 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2299 ret
= dquot_acquire(dquot
);
2300 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2301 err
= journal_end(&th
);
2305 reiserfs_write_unlock(dquot
->dq_sb
);
2309 static int reiserfs_release_dquot(struct dquot
*dquot
)
2311 struct reiserfs_transaction_handle th
;
2314 reiserfs_write_lock(dquot
->dq_sb
);
2316 journal_begin(&th
, dquot
->dq_sb
,
2317 REISERFS_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2318 reiserfs_write_unlock(dquot
->dq_sb
);
2320 /* Release dquot anyway to avoid endless cycle in dqput() */
2321 dquot_release(dquot
);
2324 ret
= dquot_release(dquot
);
2325 reiserfs_write_lock(dquot
->dq_sb
);
2326 err
= journal_end(&th
);
2329 reiserfs_write_unlock(dquot
->dq_sb
);
2334 static int reiserfs_mark_dquot_dirty(struct dquot
*dquot
)
2336 /* Are we journaling quotas? */
2337 if (REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2338 REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2339 dquot_mark_dquot_dirty(dquot
);
2340 return reiserfs_write_dquot(dquot
);
2342 return dquot_mark_dquot_dirty(dquot
);
2345 static int reiserfs_write_info(struct super_block
*sb
, int type
)
2347 struct reiserfs_transaction_handle th
;
2351 /* Data block + inode block */
2352 reiserfs_write_lock(sb
);
2353 ret
= journal_begin(&th
, sb
, 2);
2356 depth
= reiserfs_write_unlock_nested(sb
);
2357 ret
= dquot_commit_info(sb
, type
);
2358 reiserfs_write_lock_nested(sb
, depth
);
2359 err
= journal_end(&th
);
2363 reiserfs_write_unlock(sb
);
2368 * Turn on quotas during mount time - we need to find the quota file and such...
2370 static int reiserfs_quota_on_mount(struct super_block
*sb
, int type
)
2372 return dquot_quota_on_mount(sb
, REISERFS_SB(sb
)->s_qf_names
[type
],
2373 REISERFS_SB(sb
)->s_jquota_fmt
, type
);
2377 * Standard function to be called on quota_on
2379 static int reiserfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
2380 const struct path
*path
)
2383 struct inode
*inode
;
2384 struct reiserfs_transaction_handle th
;
2385 int opt
= type
== USRQUOTA
? REISERFS_USRQUOTA
: REISERFS_GRPQUOTA
;
2387 reiserfs_write_lock(sb
);
2388 if (!(REISERFS_SB(sb
)->s_mount_opt
& (1 << opt
))) {
2393 /* Quotafile not on the same filesystem? */
2394 if (path
->dentry
->d_sb
!= sb
) {
2398 inode
= d_inode(path
->dentry
);
2400 * We must not pack tails for quota files on reiserfs for quota
2403 if (!(REISERFS_I(inode
)->i_flags
& i_nopack_mask
)) {
2404 err
= reiserfs_unpack(inode
, NULL
);
2406 reiserfs_warning(sb
, "super-6520",
2407 "Unpacking tail of quota file failed"
2408 " (%d). Cannot turn on quotas.", err
);
2412 mark_inode_dirty(inode
);
2414 /* Journaling quota? */
2415 if (REISERFS_SB(sb
)->s_qf_names
[type
]) {
2416 /* Quotafile not of fs root? */
2417 if (path
->dentry
->d_parent
!= sb
->s_root
)
2418 reiserfs_warning(sb
, "super-6521",
2419 "Quota file not on filesystem root. "
2420 "Journalled quota will not work.");
2424 * When we journal data on quota file, we have to flush journal to see
2425 * all updates to the file when we bypass pagecache...
2427 if (reiserfs_file_data_log(inode
)) {
2428 /* Just start temporary transaction and finish it */
2429 err
= journal_begin(&th
, sb
, 1);
2432 err
= journal_end_sync(&th
);
2436 reiserfs_write_unlock(sb
);
2437 err
= dquot_quota_on(sb
, type
, format_id
, path
);
2440 REISERFS_I(inode
)->i_attrs
|= REISERFS_IMMUTABLE_FL
|
2441 REISERFS_NOATIME_FL
;
2442 inode_set_flags(inode
, S_IMMUTABLE
| S_NOATIME
,
2443 S_IMMUTABLE
| S_NOATIME
);
2444 inode_unlock(inode
);
2445 mark_inode_dirty(inode
);
2449 reiserfs_write_unlock(sb
);
2453 static int reiserfs_quota_off(struct super_block
*sb
, int type
)
2456 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2458 if (!inode
|| !igrab(inode
))
2461 err
= dquot_quota_off(sb
, type
);
2466 REISERFS_I(inode
)->i_attrs
&= ~(REISERFS_IMMUTABLE_FL
|
2467 REISERFS_NOATIME_FL
);
2468 inode_set_flags(inode
, 0, S_IMMUTABLE
| S_NOATIME
);
2469 inode_unlock(inode
);
2470 mark_inode_dirty(inode
);
2475 return dquot_quota_off(sb
, type
);
2479 * Read data from quotafile - avoid pagecache and such because we cannot afford
2480 * acquiring the locks... As quota files are never truncated and quota code
2481 * itself serializes the operations (and no one else should touch the files)
2482 * we don't have to be afraid of races
2484 static ssize_t
reiserfs_quota_read(struct super_block
*sb
, int type
, char *data
,
2485 size_t len
, loff_t off
)
2487 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2488 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2489 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2491 struct buffer_head tmp_bh
, *bh
;
2492 loff_t i_size
= i_size_read(inode
);
2496 if (off
+ len
> i_size
)
2499 while (toread
> 0) {
2501 sb
->s_blocksize
- offset
<
2502 toread
? sb
->s_blocksize
- offset
: toread
;
2505 * Quota files are without tails so we can safely
2508 reiserfs_write_lock(sb
);
2509 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, 0);
2510 reiserfs_write_unlock(sb
);
2513 if (!buffer_mapped(&tmp_bh
)) /* A hole? */
2514 memset(data
, 0, tocopy
);
2516 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2519 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
2531 * Write to quotafile (we know the transaction is already started and has
2534 static ssize_t
reiserfs_quota_write(struct super_block
*sb
, int type
,
2535 const char *data
, size_t len
, loff_t off
)
2537 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2538 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2539 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2540 int journal_quota
= REISERFS_SB(sb
)->s_qf_names
[type
] != NULL
;
2541 size_t towrite
= len
;
2542 struct buffer_head tmp_bh
, *bh
;
2544 if (!current
->journal_info
) {
2545 printk(KERN_WARNING
"reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2546 (unsigned long long)off
, (unsigned long long)len
);
2549 while (towrite
> 0) {
2550 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2551 sb
->s_blocksize
- offset
: towrite
;
2553 reiserfs_write_lock(sb
);
2554 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, GET_BLOCK_CREATE
);
2555 reiserfs_write_unlock(sb
);
2558 if (offset
|| tocopy
!= sb
->s_blocksize
)
2559 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2561 bh
= sb_getblk(sb
, tmp_bh
.b_blocknr
);
2567 memcpy(bh
->b_data
+ offset
, data
, tocopy
);
2568 flush_dcache_page(bh
->b_page
);
2569 set_buffer_uptodate(bh
);
2571 reiserfs_write_lock(sb
);
2572 reiserfs_prepare_for_journal(sb
, bh
, 1);
2573 journal_mark_dirty(current
->journal_info
, bh
);
2575 reiserfs_add_ordered_list(inode
, bh
);
2576 reiserfs_write_unlock(sb
);
2586 if (inode
->i_size
< off
+ len
- towrite
)
2587 i_size_write(inode
, off
+ len
- towrite
);
2588 inode
->i_mtime
= inode
->i_ctime
= current_time(inode
);
2589 mark_inode_dirty(inode
);
2590 return len
- towrite
;
2595 static struct dentry
*get_super_block(struct file_system_type
*fs_type
,
2596 int flags
, const char *dev_name
,
2599 return mount_bdev(fs_type
, flags
, dev_name
, data
, reiserfs_fill_super
);
2602 static int __init
init_reiserfs_fs(void)
2606 ret
= init_inodecache();
2610 reiserfs_proc_info_global_init();
2612 ret
= register_filesystem(&reiserfs_fs_type
);
2618 reiserfs_proc_info_global_done();
2619 destroy_inodecache();
2624 static void __exit
exit_reiserfs_fs(void)
2626 reiserfs_proc_info_global_done();
2627 unregister_filesystem(&reiserfs_fs_type
);
2628 destroy_inodecache();
2631 struct file_system_type reiserfs_fs_type
= {
2632 .owner
= THIS_MODULE
,
2634 .mount
= get_super_block
,
2635 .kill_sb
= reiserfs_kill_sb
,
2636 .fs_flags
= FS_REQUIRES_DEV
,
2638 MODULE_ALIAS_FS("reiserfs");
2640 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2641 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2642 MODULE_LICENSE("GPL");
2644 module_init(init_reiserfs_fs
);
2645 module_exit(exit_reiserfs_fs
);