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
;
92 spin_lock(&sbi
->old_work_lock
);
94 spin_unlock(&sbi
->old_work_lock
);
96 reiserfs_sync_fs(s
, 1);
99 void reiserfs_schedule_old_flush(struct super_block
*s
)
101 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
105 * Avoid scheduling flush when sb is being shut down. It can race
106 * with journal shutdown and free still queued delayed work.
108 if (s
->s_flags
& MS_RDONLY
|| !(s
->s_flags
& MS_ACTIVE
))
111 spin_lock(&sbi
->old_work_lock
);
112 if (!sbi
->work_queued
) {
113 delay
= msecs_to_jiffies(dirty_writeback_interval
* 10);
114 queue_delayed_work(system_long_wq
, &sbi
->old_work
, delay
);
115 sbi
->work_queued
= 1;
117 spin_unlock(&sbi
->old_work_lock
);
120 static void cancel_old_flush(struct super_block
*s
)
122 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
124 cancel_delayed_work_sync(&REISERFS_SB(s
)->old_work
);
125 spin_lock(&sbi
->old_work_lock
);
126 sbi
->work_queued
= 0;
127 spin_unlock(&sbi
->old_work_lock
);
130 static int reiserfs_freeze(struct super_block
*s
)
132 struct reiserfs_transaction_handle th
;
136 reiserfs_write_lock(s
);
137 if (!(s
->s_flags
& MS_RDONLY
)) {
138 int err
= journal_begin(&th
, s
, 1);
140 reiserfs_block_writes(&th
);
142 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
144 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
145 reiserfs_block_writes(&th
);
146 journal_end_sync(&th
);
149 reiserfs_write_unlock(s
);
153 static int reiserfs_unfreeze(struct super_block
*s
)
155 reiserfs_allow_writes(s
);
159 extern const struct in_core_key MAX_IN_CORE_KEY
;
162 * this is used to delete "save link" when there are no items of a
163 * file it points to. It can either happen if unlink is completed but
164 * "save unlink" removal, or if file has both unlink and truncate
165 * pending and as unlink completes first (because key of "save link"
166 * protecting unlink is bigger that a key lf "save link" which
167 * protects truncate), so there left no items to make truncate
170 static int remove_save_link_only(struct super_block
*s
,
171 struct reiserfs_key
*key
, int oid_free
)
173 struct reiserfs_transaction_handle th
;
176 /* we are going to do one balancing */
177 err
= journal_begin(&th
, s
, JOURNAL_PER_BALANCE_CNT
);
181 reiserfs_delete_solid_item(&th
, NULL
, key
);
183 /* removals are protected by direct items */
184 reiserfs_release_objectid(&th
, le32_to_cpu(key
->k_objectid
));
186 return journal_end(&th
);
190 static int reiserfs_quota_on_mount(struct super_block
*, int);
193 /* look for uncompleted unlinks and truncates and complete them */
194 static int finish_unfinished(struct super_block
*s
)
196 INITIALIZE_PATH(path
);
197 struct cpu_key max_cpu_key
, obj_key
;
198 struct reiserfs_key save_link_key
, last_inode_key
;
200 struct item_head
*ih
;
201 struct buffer_head
*bh
;
210 int quota_enabled
[REISERFS_MAXQUOTAS
];
213 /* compose key to look for "save" links */
214 max_cpu_key
.version
= KEY_FORMAT_3_5
;
215 max_cpu_key
.on_disk_key
.k_dir_id
= ~0U;
216 max_cpu_key
.on_disk_key
.k_objectid
= ~0U;
217 set_cpu_key_k_offset(&max_cpu_key
, ~0U);
218 max_cpu_key
.key_length
= 3;
220 memset(&last_inode_key
, 0, sizeof(last_inode_key
));
223 /* Needed for iput() to work correctly and not trash data */
224 if (s
->s_flags
& MS_ACTIVE
) {
228 s
->s_flags
|= MS_ACTIVE
;
230 /* Turn on quotas so that they are updated correctly */
231 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
232 quota_enabled
[i
] = 1;
233 if (REISERFS_SB(s
)->s_qf_names
[i
]) {
236 if (sb_has_quota_active(s
, i
)) {
237 quota_enabled
[i
] = 0;
240 ret
= reiserfs_quota_on_mount(s
, i
);
242 reiserfs_warning(s
, "reiserfs-2500",
243 "cannot turn on journaled "
244 "quota: error %d", ret
);
250 REISERFS_SB(s
)->s_is_unlinked_ok
= 1;
253 retval
= search_item(s
, &max_cpu_key
, &path
);
254 if (retval
!= ITEM_NOT_FOUND
) {
255 reiserfs_error(s
, "vs-2140",
256 "search_by_key returned %d", retval
);
260 bh
= get_last_bh(&path
);
261 item_pos
= get_item_pos(&path
);
262 if (item_pos
!= B_NR_ITEMS(bh
)) {
263 reiserfs_warning(s
, "vs-2060",
264 "wrong position found");
268 ih
= item_head(bh
, item_pos
);
270 if (le32_to_cpu(ih
->ih_key
.k_dir_id
) != MAX_KEY_OBJECTID
)
271 /* there are no "save" links anymore */
274 save_link_key
= ih
->ih_key
;
275 if (is_indirect_le_ih(ih
))
280 /* reiserfs_iget needs k_dirid and k_objectid only */
281 item
= ih_item_body(bh
, ih
);
282 obj_key
.on_disk_key
.k_dir_id
= le32_to_cpu(*(__le32
*) item
);
283 obj_key
.on_disk_key
.k_objectid
=
284 le32_to_cpu(ih
->ih_key
.k_objectid
);
285 obj_key
.on_disk_key
.k_offset
= 0;
286 obj_key
.on_disk_key
.k_type
= 0;
290 inode
= reiserfs_iget(s
, &obj_key
);
291 if (IS_ERR_OR_NULL(inode
)) {
293 * the unlink almost completed, it just did not
294 * manage to remove "save" link and release objectid
296 reiserfs_warning(s
, "vs-2180", "iget failed for %K",
298 retval
= remove_save_link_only(s
, &save_link_key
, 1);
302 if (!truncate
&& inode
->i_nlink
) {
303 /* file is not unlinked */
304 reiserfs_warning(s
, "vs-2185",
305 "file %K is not unlinked",
307 retval
= remove_save_link_only(s
, &save_link_key
, 0);
310 depth
= reiserfs_write_unlock_nested(inode
->i_sb
);
311 dquot_initialize(inode
);
312 reiserfs_write_lock_nested(inode
->i_sb
, depth
);
314 if (truncate
&& S_ISDIR(inode
->i_mode
)) {
316 * We got a truncate request for a dir which
317 * is impossible. The only imaginable way is to
318 * execute unfinished truncate request then boot
319 * into old kernel, remove the file and create dir
322 reiserfs_warning(s
, "green-2101",
323 "impossible truncate on a "
324 "directory %k. Please report",
326 retval
= remove_save_link_only(s
, &save_link_key
, 0);
333 REISERFS_I(inode
)->i_flags
|=
334 i_link_saved_truncate_mask
;
336 * not completed truncate found. New size was
337 * committed together with "save" link
339 reiserfs_info(s
, "Truncating %k to %lld ..",
340 INODE_PKEY(inode
), inode
->i_size
);
342 /* don't update modification time */
343 reiserfs_truncate_file(inode
, 0);
345 retval
= remove_save_link(inode
, truncate
);
347 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
348 /* not completed unlink (rmdir) found */
349 reiserfs_info(s
, "Removing %k..", INODE_PKEY(inode
));
350 if (memcmp(&last_inode_key
, INODE_PKEY(inode
),
351 sizeof(last_inode_key
))){
352 last_inode_key
= *INODE_PKEY(inode
);
353 /* removal gets completed in iput */
356 reiserfs_warning(s
, "super-2189", "Dead loop "
357 "in finish_unfinished "
358 "detected, just remove "
360 retval
= remove_save_link_only(s
,
369 REISERFS_SB(s
)->s_is_unlinked_ok
= 0;
372 /* Turn quotas off */
373 reiserfs_write_unlock(s
);
374 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
375 if (sb_dqopt(s
)->files
[i
] && quota_enabled
[i
])
376 dquot_quota_off(s
, i
);
378 reiserfs_write_lock(s
);
380 /* Restore the flag back */
381 s
->s_flags
&= ~MS_ACTIVE
;
385 reiserfs_info(s
, "There were %d uncompleted unlinks/truncates. "
386 "Completed\n", done
);
391 * to protect file being unlinked from getting lost we "safe" link files
392 * being unlinked. This link will be deleted in the same transaction with last
393 * item of file. mounting the filesystem we scan all these links and remove
394 * files which almost got lost
396 void add_save_link(struct reiserfs_transaction_handle
*th
,
397 struct inode
*inode
, int truncate
)
399 INITIALIZE_PATH(path
);
405 BUG_ON(!th
->t_trans_id
);
407 /* file can only get one "save link" of each kind */
409 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
),
410 "saved link already exists for truncated inode %lx",
413 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
),
414 "saved link already exists for unlinked inode %lx",
417 /* setup key of "save" link */
418 key
.version
= KEY_FORMAT_3_5
;
419 key
.on_disk_key
.k_dir_id
= MAX_KEY_OBJECTID
;
420 key
.on_disk_key
.k_objectid
= inode
->i_ino
;
422 /* unlink, rmdir, rename */
423 set_cpu_key_k_offset(&key
, 1 + inode
->i_sb
->s_blocksize
);
424 set_cpu_key_k_type(&key
, TYPE_DIRECT
);
426 /* item head of "safe" link */
427 make_le_item_head(&ih
, &key
, key
.version
,
428 1 + inode
->i_sb
->s_blocksize
, TYPE_DIRECT
,
429 4 /*length */ , 0xffff /*free space */ );
432 if (S_ISDIR(inode
->i_mode
))
433 reiserfs_warning(inode
->i_sb
, "green-2102",
434 "Adding a truncate savelink for "
435 "a directory %k! Please report",
437 set_cpu_key_k_offset(&key
, 1);
438 set_cpu_key_k_type(&key
, TYPE_INDIRECT
);
440 /* item head of "safe" link */
441 make_le_item_head(&ih
, &key
, key
.version
, 1, TYPE_INDIRECT
,
442 4 /*length */ , 0 /*free space */ );
446 /* look for its place in the tree */
447 retval
= search_item(inode
->i_sb
, &key
, &path
);
448 if (retval
!= ITEM_NOT_FOUND
) {
449 if (retval
!= -ENOSPC
)
450 reiserfs_error(inode
->i_sb
, "vs-2100",
451 "search_by_key (%K) returned %d", &key
,
457 /* body of "save" link */
458 link
= INODE_PKEY(inode
)->k_dir_id
;
460 /* put "save" link into tree, don't charge quota to anyone */
462 reiserfs_insert_item(th
, &path
, &key
, &ih
, NULL
, (char *)&link
);
464 if (retval
!= -ENOSPC
)
465 reiserfs_error(inode
->i_sb
, "vs-2120",
466 "insert_item returned %d", retval
);
469 REISERFS_I(inode
)->i_flags
|=
470 i_link_saved_truncate_mask
;
472 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
476 /* this opens transaction unlike add_save_link */
477 int remove_save_link(struct inode
*inode
, int truncate
)
479 struct reiserfs_transaction_handle th
;
480 struct reiserfs_key key
;
483 /* we are going to do one balancing only */
484 err
= journal_begin(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
);
488 /* setup key of "save" link */
489 key
.k_dir_id
= cpu_to_le32(MAX_KEY_OBJECTID
);
490 key
.k_objectid
= INODE_PKEY(inode
)->k_objectid
;
492 /* unlink, rmdir, rename */
493 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
,
494 1 + inode
->i_sb
->s_blocksize
);
495 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_DIRECT
);
498 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
, 1);
499 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_INDIRECT
);
503 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
)) ||
505 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
)))
506 /* don't take quota bytes from anywhere */
507 reiserfs_delete_solid_item(&th
, NULL
, &key
);
509 reiserfs_release_objectid(&th
, inode
->i_ino
);
510 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_unlink_mask
;
512 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_truncate_mask
;
514 return journal_end(&th
);
517 static void reiserfs_kill_sb(struct super_block
*s
)
519 if (REISERFS_SB(s
)) {
520 reiserfs_proc_info_done(s
);
522 * Force any pending inode evictions to occur now. Any
523 * inodes to be removed that have extended attributes
524 * associated with them need to clean them up before
525 * we can release the extended attribute root dentries.
526 * shrink_dcache_for_umount will BUG if we don't release
527 * those before it's called so ->put_super is too late.
531 dput(REISERFS_SB(s
)->xattr_root
);
532 REISERFS_SB(s
)->xattr_root
= NULL
;
533 dput(REISERFS_SB(s
)->priv_root
);
534 REISERFS_SB(s
)->priv_root
= NULL
;
540 static void reiserfs_put_super(struct super_block
*s
)
542 struct reiserfs_transaction_handle th
;
545 dquot_disable(s
, -1, DQUOT_USAGE_ENABLED
| DQUOT_LIMITS_ENABLED
);
547 reiserfs_write_lock(s
);
550 * change file system state to current state if it was mounted
551 * with read-write permissions
553 if (!(s
->s_flags
& MS_RDONLY
)) {
554 if (!journal_begin(&th
, s
, 10)) {
555 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
557 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s
),
558 REISERFS_SB(s
)->s_mount_state
);
559 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
564 * note, journal_release checks for readonly mount, and can
565 * decide not to do a journal_end
567 journal_release(&th
, s
);
569 reiserfs_free_bitmap_cache(s
);
571 brelse(SB_BUFFER_WITH_SB(s
));
575 if (REISERFS_SB(s
)->reserved_blocks
!= 0) {
576 reiserfs_warning(s
, "green-2005", "reserved blocks left %d",
577 REISERFS_SB(s
)->reserved_blocks
);
580 reiserfs_write_unlock(s
);
581 mutex_destroy(&REISERFS_SB(s
)->lock
);
582 destroy_workqueue(REISERFS_SB(s
)->commit_wq
);
587 static struct kmem_cache
*reiserfs_inode_cachep
;
589 static struct inode
*reiserfs_alloc_inode(struct super_block
*sb
)
591 struct reiserfs_inode_info
*ei
;
592 ei
= kmem_cache_alloc(reiserfs_inode_cachep
, GFP_KERNEL
);
595 atomic_set(&ei
->openers
, 0);
596 mutex_init(&ei
->tailpack
);
598 memset(&ei
->i_dquot
, 0, sizeof(ei
->i_dquot
));
601 return &ei
->vfs_inode
;
604 static void reiserfs_i_callback(struct rcu_head
*head
)
606 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
607 kmem_cache_free(reiserfs_inode_cachep
, REISERFS_I(inode
));
610 static void reiserfs_destroy_inode(struct inode
*inode
)
612 call_rcu(&inode
->i_rcu
, reiserfs_i_callback
);
615 static void init_once(void *foo
)
617 struct reiserfs_inode_info
*ei
= (struct reiserfs_inode_info
*)foo
;
619 INIT_LIST_HEAD(&ei
->i_prealloc_list
);
620 inode_init_once(&ei
->vfs_inode
);
623 static int __init
init_inodecache(void)
625 reiserfs_inode_cachep
= kmem_cache_create("reiser_inode_cache",
627 reiserfs_inode_info
),
628 0, (SLAB_RECLAIM_ACCOUNT
|
632 if (reiserfs_inode_cachep
== NULL
)
637 static void destroy_inodecache(void)
640 * Make sure all delayed rcu free inodes are flushed before we
644 kmem_cache_destroy(reiserfs_inode_cachep
);
647 /* we don't mark inodes dirty, we just log them */
648 static void reiserfs_dirty_inode(struct inode
*inode
, int flags
)
650 struct reiserfs_transaction_handle th
;
654 if (inode
->i_sb
->s_flags
& MS_RDONLY
) {
655 reiserfs_warning(inode
->i_sb
, "clm-6006",
656 "writing inode %lu on readonly FS",
660 reiserfs_write_lock(inode
->i_sb
);
663 * this is really only used for atime updates, so they don't have
664 * to be included in O_SYNC or fsync
666 err
= journal_begin(&th
, inode
->i_sb
, 1);
670 reiserfs_update_sd(&th
, inode
);
674 reiserfs_write_unlock(inode
->i_sb
);
677 static int reiserfs_show_options(struct seq_file
*seq
, struct dentry
*root
)
679 struct super_block
*s
= root
->d_sb
;
680 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
681 long opts
= REISERFS_SB(s
)->s_mount_opt
;
683 if (opts
& (1 << REISERFS_LARGETAIL
))
684 seq_puts(seq
, ",tails=on");
685 else if (!(opts
& (1 << REISERFS_SMALLTAIL
)))
686 seq_puts(seq
, ",notail");
687 /* tails=small is default so we don't show it */
689 if (!(opts
& (1 << REISERFS_BARRIER_FLUSH
)))
690 seq_puts(seq
, ",barrier=none");
691 /* barrier=flush is default so we don't show it */
693 if (opts
& (1 << REISERFS_ERROR_CONTINUE
))
694 seq_puts(seq
, ",errors=continue");
695 else if (opts
& (1 << REISERFS_ERROR_PANIC
))
696 seq_puts(seq
, ",errors=panic");
697 /* errors=ro is default so we don't show it */
699 if (opts
& (1 << REISERFS_DATA_LOG
))
700 seq_puts(seq
, ",data=journal");
701 else if (opts
& (1 << REISERFS_DATA_WRITEBACK
))
702 seq_puts(seq
, ",data=writeback");
703 /* data=ordered is default so we don't show it */
705 if (opts
& (1 << REISERFS_ATTRS
))
706 seq_puts(seq
, ",attrs");
708 if (opts
& (1 << REISERFS_XATTRS_USER
))
709 seq_puts(seq
, ",user_xattr");
711 if (opts
& (1 << REISERFS_EXPOSE_PRIVROOT
))
712 seq_puts(seq
, ",expose_privroot");
714 if (opts
& (1 << REISERFS_POSIXACL
))
715 seq_puts(seq
, ",acl");
717 if (REISERFS_SB(s
)->s_jdev
)
718 seq_show_option(seq
, "jdev", REISERFS_SB(s
)->s_jdev
);
720 if (journal
->j_max_commit_age
!= journal
->j_default_max_commit_age
)
721 seq_printf(seq
, ",commit=%d", journal
->j_max_commit_age
);
724 if (REISERFS_SB(s
)->s_qf_names
[USRQUOTA
])
725 seq_show_option(seq
, "usrjquota",
726 REISERFS_SB(s
)->s_qf_names
[USRQUOTA
]);
727 else if (opts
& (1 << REISERFS_USRQUOTA
))
728 seq_puts(seq
, ",usrquota");
729 if (REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
])
730 seq_show_option(seq
, "grpjquota",
731 REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
]);
732 else if (opts
& (1 << REISERFS_GRPQUOTA
))
733 seq_puts(seq
, ",grpquota");
734 if (REISERFS_SB(s
)->s_jquota_fmt
) {
735 if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_OLD
)
736 seq_puts(seq
, ",jqfmt=vfsold");
737 else if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_V0
)
738 seq_puts(seq
, ",jqfmt=vfsv0");
742 /* Block allocator options */
743 if (opts
& (1 << REISERFS_NO_BORDER
))
744 seq_puts(seq
, ",block-allocator=noborder");
745 if (opts
& (1 << REISERFS_NO_UNHASHED_RELOCATION
))
746 seq_puts(seq
, ",block-allocator=no_unhashed_relocation");
747 if (opts
& (1 << REISERFS_HASHED_RELOCATION
))
748 seq_puts(seq
, ",block-allocator=hashed_relocation");
749 if (opts
& (1 << REISERFS_TEST4
))
750 seq_puts(seq
, ",block-allocator=test4");
751 show_alloc_options(seq
, s
);
756 static ssize_t
reiserfs_quota_write(struct super_block
*, int, const char *,
758 static ssize_t
reiserfs_quota_read(struct super_block
*, int, char *, size_t,
761 static struct dquot
**reiserfs_get_dquots(struct inode
*inode
)
763 return REISERFS_I(inode
)->i_dquot
;
767 static const struct super_operations reiserfs_sops
= {
768 .alloc_inode
= reiserfs_alloc_inode
,
769 .destroy_inode
= reiserfs_destroy_inode
,
770 .write_inode
= reiserfs_write_inode
,
771 .dirty_inode
= reiserfs_dirty_inode
,
772 .evict_inode
= reiserfs_evict_inode
,
773 .put_super
= reiserfs_put_super
,
774 .sync_fs
= reiserfs_sync_fs
,
775 .freeze_fs
= reiserfs_freeze
,
776 .unfreeze_fs
= reiserfs_unfreeze
,
777 .statfs
= reiserfs_statfs
,
778 .remount_fs
= reiserfs_remount
,
779 .show_options
= reiserfs_show_options
,
781 .quota_read
= reiserfs_quota_read
,
782 .quota_write
= reiserfs_quota_write
,
783 .get_dquots
= reiserfs_get_dquots
,
788 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
790 static int reiserfs_write_dquot(struct dquot
*);
791 static int reiserfs_acquire_dquot(struct dquot
*);
792 static int reiserfs_release_dquot(struct dquot
*);
793 static int reiserfs_mark_dquot_dirty(struct dquot
*);
794 static int reiserfs_write_info(struct super_block
*, int);
795 static int reiserfs_quota_on(struct super_block
*, int, int, struct path
*);
797 static const struct dquot_operations reiserfs_quota_operations
= {
798 .write_dquot
= reiserfs_write_dquot
,
799 .acquire_dquot
= reiserfs_acquire_dquot
,
800 .release_dquot
= reiserfs_release_dquot
,
801 .mark_dirty
= reiserfs_mark_dquot_dirty
,
802 .write_info
= reiserfs_write_info
,
803 .alloc_dquot
= dquot_alloc
,
804 .destroy_dquot
= dquot_destroy
,
807 static const struct quotactl_ops reiserfs_qctl_operations
= {
808 .quota_on
= reiserfs_quota_on
,
809 .quota_off
= dquot_quota_off
,
810 .quota_sync
= dquot_quota_sync
,
811 .get_state
= dquot_get_state
,
812 .set_info
= dquot_set_dqinfo
,
813 .get_dqblk
= dquot_get_dqblk
,
814 .set_dqblk
= dquot_set_dqblk
,
818 static const struct export_operations reiserfs_export_ops
= {
819 .encode_fh
= reiserfs_encode_fh
,
820 .fh_to_dentry
= reiserfs_fh_to_dentry
,
821 .fh_to_parent
= reiserfs_fh_to_parent
,
822 .get_parent
= reiserfs_get_parent
,
826 * this struct is used in reiserfs_getopt () for containing the value for
827 * those mount options that have values rather than being toggles.
832 * bitmask which is to set on mount_options bitmask
833 * when this value is found, 0 is no bits are to be changed.
837 * bitmask which is to clear on mount_options bitmask
838 * when this value is found, 0 is no bits are to be changed.
839 * This is applied BEFORE setmask
844 /* Set this bit in arg_required to allow empty arguments */
845 #define REISERFS_OPT_ALLOWEMPTY 31
848 * this struct is used in reiserfs_getopt() for describing the
849 * set of reiserfs mount options
854 /* 0 if argument is not required, not 0 otherwise */
857 /* list of values accepted by an option */
858 const arg_desc_t
*values
;
861 * bitmask which is to set on mount_options bitmask
862 * when this value is found, 0 is no bits are to be changed.
867 * bitmask which is to clear on mount_options bitmask
868 * when this value is found, 0 is no bits are to be changed.
869 * This is applied BEFORE setmask
874 /* possible values for -o data= */
875 static const arg_desc_t logging_mode
[] = {
876 {"ordered", 1 << REISERFS_DATA_ORDERED
,
877 (1 << REISERFS_DATA_LOG
| 1 << REISERFS_DATA_WRITEBACK
)},
878 {"journal", 1 << REISERFS_DATA_LOG
,
879 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_WRITEBACK
)},
880 {"writeback", 1 << REISERFS_DATA_WRITEBACK
,
881 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_LOG
)},
885 /* possible values for -o barrier= */
886 static const arg_desc_t barrier_mode
[] = {
887 {"none", 1 << REISERFS_BARRIER_NONE
, 1 << REISERFS_BARRIER_FLUSH
},
888 {"flush", 1 << REISERFS_BARRIER_FLUSH
, 1 << REISERFS_BARRIER_NONE
},
893 * possible values for "-o block-allocator=" and bits which are to be set in
894 * s_mount_opt of reiserfs specific part of in-core super block
896 static const arg_desc_t balloc
[] = {
897 {"noborder", 1 << REISERFS_NO_BORDER
, 0},
898 {"border", 0, 1 << REISERFS_NO_BORDER
},
899 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION
, 0},
900 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION
, 0},
901 {"test4", 1 << REISERFS_TEST4
, 0},
902 {"notest4", 0, 1 << REISERFS_TEST4
},
906 static const arg_desc_t tails
[] = {
907 {"on", 1 << REISERFS_LARGETAIL
, 1 << REISERFS_SMALLTAIL
},
908 {"off", 0, (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
909 {"small", 1 << REISERFS_SMALLTAIL
, 1 << REISERFS_LARGETAIL
},
913 static const arg_desc_t error_actions
[] = {
914 {"panic", 1 << REISERFS_ERROR_PANIC
,
915 (1 << REISERFS_ERROR_RO
| 1 << REISERFS_ERROR_CONTINUE
)},
916 {"ro-remount", 1 << REISERFS_ERROR_RO
,
917 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_CONTINUE
)},
918 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
919 {"continue", 1 << REISERFS_ERROR_CONTINUE
,
920 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_RO
)},
926 * proceed only one option from a list *cur - string containing of mount
928 * opts - array of options which are accepted
929 * opt_arg - if option is found and requires an argument and if it is specifed
930 * in the input - pointer to the argument is stored here
931 * bit_flags - if option requires to set a certain bit - it is set here
932 * return -1 if unknown option is found, opt->arg_required otherwise
934 static int reiserfs_getopt(struct super_block
*s
, char **cur
, opt_desc_t
* opts
,
935 char **opt_arg
, unsigned long *bit_flags
)
945 const opt_desc_t
*opt
;
946 const arg_desc_t
*arg
;
950 /* assume argument cannot contain commas */
951 *cur
= strchr(p
, ',');
957 if (!strncmp(p
, "alloc=", 6)) {
959 * Ugly special case, probably we should redo options
960 * parser so that it can understand several arguments for
961 * some options, also so that it can fill several bitfields
962 * with option values.
964 if (reiserfs_parse_alloc_options(s
, p
+ 6)) {
971 /* for every option in the list */
972 for (opt
= opts
; opt
->option_name
; opt
++) {
973 if (!strncmp(p
, opt
->option_name
, strlen(opt
->option_name
))) {
976 (1 << REISERFS_UNSUPPORTED_OPT
))
977 reiserfs_warning(s
, "super-6500",
978 "%s not supported.\n",
981 *bit_flags
&= ~opt
->clrmask
;
983 (1 << REISERFS_UNSUPPORTED_OPT
))
984 reiserfs_warning(s
, "super-6501",
985 "%s not supported.\n",
988 *bit_flags
|= opt
->setmask
;
993 if (!opt
->option_name
) {
994 reiserfs_warning(s
, "super-6502",
995 "unknown mount option \"%s\"", p
);
999 p
+= strlen(opt
->option_name
);
1002 if (!opt
->arg_required
) {
1003 reiserfs_warning(s
, "super-6503",
1004 "the option \"%s\" does not "
1005 "require an argument\n",
1012 if (opt
->arg_required
) {
1013 reiserfs_warning(s
, "super-6504",
1014 "the option \"%s\" requires an "
1015 "argument\n", opt
->option_name
);
1020 reiserfs_warning(s
, "super-6505",
1021 "head of option \"%s\" is only correct\n",
1027 * move to the argument, or to next option if argument is not
1032 if (opt
->arg_required
1033 && !(opt
->arg_required
& (1 << REISERFS_OPT_ALLOWEMPTY
))
1035 /* this catches "option=," if not allowed */
1036 reiserfs_warning(s
, "super-6506",
1037 "empty argument for \"%s\"\n",
1043 /* *=NULLopt_arg contains pointer to argument */
1045 return opt
->arg_required
& ~(1 << REISERFS_OPT_ALLOWEMPTY
);
1048 /* values possible for this option are listed in opt->values */
1049 for (arg
= opt
->values
; arg
->value
; arg
++) {
1050 if (!strcmp(p
, arg
->value
)) {
1052 *bit_flags
&= ~arg
->clrmask
;
1053 *bit_flags
|= arg
->setmask
;
1055 return opt
->arg_required
;
1059 reiserfs_warning(s
, "super-6506",
1060 "bad value \"%s\" for option \"%s\"\n", p
,
1065 /* returns 0 if something is wrong in option string, 1 - otherwise */
1066 static int reiserfs_parse_options(struct super_block
*s
,
1068 /* string given via mount's -o */
1072 * after the parsing phase, contains the
1073 * collection of bitflags defining what
1074 * mount options were selected.
1076 unsigned long *mount_options
,
1078 /* strtol-ed from NNN of resize=NNN */
1079 unsigned long *blocks
,
1081 unsigned int *commit_max_age
,
1088 opt_desc_t opts
[] = {
1090 * Compatibility stuff, so that -o notail for old
1093 {"tails",.arg_required
= 't',.values
= tails
},
1094 {"notail",.clrmask
=
1095 (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
1096 {"conv",.setmask
= 1 << REISERFS_CONVERT
},
1097 {"attrs",.setmask
= 1 << REISERFS_ATTRS
},
1098 {"noattrs",.clrmask
= 1 << REISERFS_ATTRS
},
1099 {"expose_privroot", .setmask
= 1 << REISERFS_EXPOSE_PRIVROOT
},
1100 #ifdef CONFIG_REISERFS_FS_XATTR
1101 {"user_xattr",.setmask
= 1 << REISERFS_XATTRS_USER
},
1102 {"nouser_xattr",.clrmask
= 1 << REISERFS_XATTRS_USER
},
1104 {"user_xattr",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1105 {"nouser_xattr",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1107 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1108 {"acl",.setmask
= 1 << REISERFS_POSIXACL
},
1109 {"noacl",.clrmask
= 1 << REISERFS_POSIXACL
},
1111 {"acl",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1112 {"noacl",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1114 {.option_name
= "nolog"},
1115 {"replayonly",.setmask
= 1 << REPLAYONLY
},
1116 {"block-allocator",.arg_required
= 'a',.values
= balloc
},
1117 {"data",.arg_required
= 'd',.values
= logging_mode
},
1118 {"barrier",.arg_required
= 'b',.values
= barrier_mode
},
1119 {"resize",.arg_required
= 'r',.values
= NULL
},
1120 {"jdev",.arg_required
= 'j',.values
= NULL
},
1121 {"nolargeio",.arg_required
= 'w',.values
= NULL
},
1122 {"commit",.arg_required
= 'c',.values
= NULL
},
1123 {"usrquota",.setmask
= 1 << REISERFS_USRQUOTA
},
1124 {"grpquota",.setmask
= 1 << REISERFS_GRPQUOTA
},
1125 {"noquota",.clrmask
= 1 << REISERFS_USRQUOTA
| 1 << REISERFS_GRPQUOTA
},
1126 {"errors",.arg_required
= 'e',.values
= error_actions
},
1127 {"usrjquota",.arg_required
=
1128 'u' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1129 {"grpjquota",.arg_required
=
1130 'g' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1131 {"jqfmt",.arg_required
= 'f',.values
= NULL
},
1132 {.option_name
= NULL
}
1136 if (!options
|| !*options
)
1138 * use default configuration: create tails, journaling on, no
1139 * conversion to newest format
1143 for (pos
= options
; pos
;) {
1144 c
= reiserfs_getopt(s
, &pos
, opts
, &arg
, mount_options
);
1146 /* wrong option is given */
1153 /* "resize=NNN" or "resize=auto" */
1155 if (!strcmp(arg
, "auto")) {
1156 /* From JFS code, to auto-get the size. */
1158 s
->s_bdev
->bd_inode
->i_size
>> s
->
1161 *blocks
= simple_strtoul(arg
, &p
, 0);
1163 /* NNN does not look like a number */
1164 reiserfs_warning(s
, "super-6507",
1174 unsigned long val
= simple_strtoul(arg
, &p
, 0);
1175 /* commit=NNN (time in seconds) */
1176 if (*p
!= '\0' || val
>= (unsigned int)-1) {
1177 reiserfs_warning(s
, "super-6508",
1178 "bad value %s for -ocommit\n",
1182 *commit_max_age
= (unsigned int)val
;
1186 reiserfs_warning(s
, "super-6509", "nolargeio option "
1187 "is no longer supported");
1192 if (arg
&& *arg
&& jdev_name
) {
1193 /* Hm, already assigned? */
1195 reiserfs_warning(s
, "super-6510",
1196 "journal device was "
1197 "already specified to "
1198 "be %s", *jdev_name
);
1205 if (c
== 'u' || c
== 'g') {
1206 int qtype
= c
== 'u' ? USRQUOTA
: GRPQUOTA
;
1208 if (sb_any_quota_loaded(s
) &&
1209 (!*arg
!= !REISERFS_SB(s
)->s_qf_names
[qtype
])) {
1210 reiserfs_warning(s
, "super-6511",
1211 "cannot change journaled "
1212 "quota options when quota "
1216 if (*arg
) { /* Some filename specified? */
1217 if (REISERFS_SB(s
)->s_qf_names
[qtype
]
1218 && strcmp(REISERFS_SB(s
)->s_qf_names
[qtype
],
1220 reiserfs_warning(s
, "super-6512",
1222 "already specified.",
1226 if (strchr(arg
, '/')) {
1227 reiserfs_warning(s
, "super-6513",
1228 "quotafile must be "
1229 "on filesystem root.");
1232 qf_names
[qtype
] = kstrdup(arg
, GFP_KERNEL
);
1233 if (!qf_names
[qtype
]) {
1234 reiserfs_warning(s
, "reiserfs-2502",
1235 "not enough memory "
1240 if (qtype
== USRQUOTA
)
1241 *mount_options
|= 1 << REISERFS_USRQUOTA
;
1243 *mount_options
|= 1 << REISERFS_GRPQUOTA
;
1245 if (qf_names
[qtype
] !=
1246 REISERFS_SB(s
)->s_qf_names
[qtype
])
1247 kfree(qf_names
[qtype
]);
1248 qf_names
[qtype
] = NULL
;
1249 if (qtype
== USRQUOTA
)
1250 *mount_options
&= ~(1 << REISERFS_USRQUOTA
);
1252 *mount_options
&= ~(1 << REISERFS_GRPQUOTA
);
1256 if (!strcmp(arg
, "vfsold"))
1257 *qfmt
= QFMT_VFS_OLD
;
1258 else if (!strcmp(arg
, "vfsv0"))
1259 *qfmt
= QFMT_VFS_V0
;
1261 reiserfs_warning(s
, "super-6514",
1262 "unknown quota format "
1266 if (sb_any_quota_loaded(s
) &&
1267 *qfmt
!= REISERFS_SB(s
)->s_jquota_fmt
) {
1268 reiserfs_warning(s
, "super-6515",
1269 "cannot change journaled "
1270 "quota options when quota "
1276 if (c
== 'u' || c
== 'g' || c
== 'f') {
1277 reiserfs_warning(s
, "reiserfs-2503", "journaled "
1278 "quota options not supported.");
1285 if (!REISERFS_SB(s
)->s_jquota_fmt
&& !*qfmt
1286 && (qf_names
[USRQUOTA
] || qf_names
[GRPQUOTA
])) {
1287 reiserfs_warning(s
, "super-6515",
1288 "journaled quota format not specified.");
1291 if ((!(*mount_options
& (1 << REISERFS_USRQUOTA
)) &&
1292 sb_has_quota_loaded(s
, USRQUOTA
)) ||
1293 (!(*mount_options
& (1 << REISERFS_GRPQUOTA
)) &&
1294 sb_has_quota_loaded(s
, GRPQUOTA
))) {
1295 reiserfs_warning(s
, "super-6516", "quota options must "
1296 "be present when quota is turned on.");
1304 static void switch_data_mode(struct super_block
*s
, unsigned long mode
)
1306 REISERFS_SB(s
)->s_mount_opt
&= ~((1 << REISERFS_DATA_LOG
) |
1307 (1 << REISERFS_DATA_ORDERED
) |
1308 (1 << REISERFS_DATA_WRITEBACK
));
1309 REISERFS_SB(s
)->s_mount_opt
|= (1 << mode
);
1312 static void handle_data_mode(struct super_block
*s
, unsigned long mount_options
)
1314 if (mount_options
& (1 << REISERFS_DATA_LOG
)) {
1315 if (!reiserfs_data_log(s
)) {
1316 switch_data_mode(s
, REISERFS_DATA_LOG
);
1317 reiserfs_info(s
, "switching to journaled data mode\n");
1319 } else if (mount_options
& (1 << REISERFS_DATA_ORDERED
)) {
1320 if (!reiserfs_data_ordered(s
)) {
1321 switch_data_mode(s
, REISERFS_DATA_ORDERED
);
1322 reiserfs_info(s
, "switching to ordered data mode\n");
1324 } else if (mount_options
& (1 << REISERFS_DATA_WRITEBACK
)) {
1325 if (!reiserfs_data_writeback(s
)) {
1326 switch_data_mode(s
, REISERFS_DATA_WRITEBACK
);
1327 reiserfs_info(s
, "switching to writeback data mode\n");
1332 static void handle_barrier_mode(struct super_block
*s
, unsigned long bits
)
1334 int flush
= (1 << REISERFS_BARRIER_FLUSH
);
1335 int none
= (1 << REISERFS_BARRIER_NONE
);
1336 int all_barrier
= flush
| none
;
1338 if (bits
& all_barrier
) {
1339 REISERFS_SB(s
)->s_mount_opt
&= ~all_barrier
;
1341 REISERFS_SB(s
)->s_mount_opt
|= flush
;
1342 printk("reiserfs: enabling write barrier flush mode\n");
1343 } else if (bits
& none
) {
1344 REISERFS_SB(s
)->s_mount_opt
|= none
;
1345 printk("reiserfs: write barriers turned off\n");
1350 static void handle_attrs(struct super_block
*s
)
1352 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(s
);
1354 if (reiserfs_attrs(s
)) {
1355 if (old_format_only(s
)) {
1356 reiserfs_warning(s
, "super-6517", "cannot support "
1357 "attributes on 3.5.x disk format");
1358 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1361 if (!(le32_to_cpu(rs
->s_flags
) & reiserfs_attrs_cleared
)) {
1362 reiserfs_warning(s
, "super-6518", "cannot support "
1363 "attributes until flag is set in "
1365 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1371 static void handle_quota_files(struct super_block
*s
, char **qf_names
,
1376 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++) {
1377 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1378 kfree(REISERFS_SB(s
)->s_qf_names
[i
]);
1379 REISERFS_SB(s
)->s_qf_names
[i
] = qf_names
[i
];
1382 REISERFS_SB(s
)->s_jquota_fmt
= *qfmt
;
1386 static int reiserfs_remount(struct super_block
*s
, int *mount_flags
, char *arg
)
1388 struct reiserfs_super_block
*rs
;
1389 struct reiserfs_transaction_handle th
;
1390 unsigned long blocks
;
1391 unsigned long mount_options
= REISERFS_SB(s
)->s_mount_opt
;
1392 unsigned long safe_mask
= 0;
1393 unsigned int commit_max_age
= (unsigned int)-1;
1394 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1395 char *new_opts
= kstrdup(arg
, GFP_KERNEL
);
1397 char *qf_names
[REISERFS_MAXQUOTAS
];
1398 unsigned int qfmt
= 0;
1404 reiserfs_write_lock(s
);
1407 memcpy(qf_names
, REISERFS_SB(s
)->s_qf_names
, sizeof(qf_names
));
1410 rs
= SB_DISK_SUPER_BLOCK(s
);
1412 if (!reiserfs_parse_options
1413 (s
, arg
, &mount_options
, &blocks
, NULL
, &commit_max_age
,
1416 for (i
= 0; i
< REISERFS_MAXQUOTAS
; i
++)
1417 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1421 goto out_err_unlock
;
1424 handle_quota_files(s
, qf_names
, &qfmt
);
1429 /* Add options that are safe here */
1430 safe_mask
|= 1 << REISERFS_SMALLTAIL
;
1431 safe_mask
|= 1 << REISERFS_LARGETAIL
;
1432 safe_mask
|= 1 << REISERFS_NO_BORDER
;
1433 safe_mask
|= 1 << REISERFS_NO_UNHASHED_RELOCATION
;
1434 safe_mask
|= 1 << REISERFS_HASHED_RELOCATION
;
1435 safe_mask
|= 1 << REISERFS_TEST4
;
1436 safe_mask
|= 1 << REISERFS_ATTRS
;
1437 safe_mask
|= 1 << REISERFS_XATTRS_USER
;
1438 safe_mask
|= 1 << REISERFS_POSIXACL
;
1439 safe_mask
|= 1 << REISERFS_BARRIER_FLUSH
;
1440 safe_mask
|= 1 << REISERFS_BARRIER_NONE
;
1441 safe_mask
|= 1 << REISERFS_ERROR_RO
;
1442 safe_mask
|= 1 << REISERFS_ERROR_CONTINUE
;
1443 safe_mask
|= 1 << REISERFS_ERROR_PANIC
;
1444 safe_mask
|= 1 << REISERFS_USRQUOTA
;
1445 safe_mask
|= 1 << REISERFS_GRPQUOTA
;
1448 * Update the bitmask, taking care to keep
1449 * the bits we're not allowed to change here
1451 REISERFS_SB(s
)->s_mount_opt
=
1453 s_mount_opt
& ~safe_mask
) | (mount_options
& safe_mask
);
1455 if (commit_max_age
!= 0 && commit_max_age
!= (unsigned int)-1) {
1456 journal
->j_max_commit_age
= commit_max_age
;
1457 journal
->j_max_trans_age
= commit_max_age
;
1458 } else if (commit_max_age
== 0) {
1459 /* 0 means restore defaults. */
1460 journal
->j_max_commit_age
= journal
->j_default_max_commit_age
;
1461 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
1465 err
= reiserfs_resize(s
, blocks
);
1467 goto out_err_unlock
;
1470 if (*mount_flags
& MS_RDONLY
) {
1471 reiserfs_write_unlock(s
);
1472 reiserfs_xattr_init(s
, *mount_flags
);
1473 /* remount read-only */
1474 if (s
->s_flags
& MS_RDONLY
)
1475 /* it is read-only already */
1476 goto out_ok_unlocked
;
1478 err
= dquot_suspend(s
, -1);
1482 /* try to remount file system with read-only permissions */
1483 if (sb_umount_state(rs
) == REISERFS_VALID_FS
1484 || REISERFS_SB(s
)->s_mount_state
!= REISERFS_VALID_FS
) {
1485 goto out_ok_unlocked
;
1488 reiserfs_write_lock(s
);
1490 err
= journal_begin(&th
, s
, 10);
1492 goto out_err_unlock
;
1494 /* Mounting a rw partition read-only. */
1495 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1496 set_sb_umount_state(rs
, REISERFS_SB(s
)->s_mount_state
);
1497 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1499 /* remount read-write */
1500 if (!(s
->s_flags
& MS_RDONLY
)) {
1501 reiserfs_write_unlock(s
);
1502 reiserfs_xattr_init(s
, *mount_flags
);
1503 goto out_ok_unlocked
; /* We are read-write already */
1506 if (reiserfs_is_journal_aborted(journal
)) {
1507 err
= journal
->j_errno
;
1508 goto out_err_unlock
;
1511 handle_data_mode(s
, mount_options
);
1512 handle_barrier_mode(s
, mount_options
);
1513 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1515 /* now it is safe to call journal_begin */
1516 s
->s_flags
&= ~MS_RDONLY
;
1517 err
= journal_begin(&th
, s
, 10);
1519 goto out_err_unlock
;
1521 /* Mount a partition which is read-only, read-write */
1522 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1523 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1524 s
->s_flags
&= ~MS_RDONLY
;
1525 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
1526 if (!old_format_only(s
))
1527 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
1528 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1529 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1530 REISERFS_SB(s
)->s_mount_state
= REISERFS_VALID_FS
;
1532 /* this will force a full flush of all journal lists */
1533 SB_JOURNAL(s
)->j_must_wait
= 1;
1534 err
= journal_end(&th
);
1536 goto out_err_unlock
;
1538 reiserfs_write_unlock(s
);
1539 if (!(*mount_flags
& MS_RDONLY
)) {
1540 dquot_resume(s
, -1);
1541 reiserfs_write_lock(s
);
1542 finish_unfinished(s
);
1543 reiserfs_write_unlock(s
);
1544 reiserfs_xattr_init(s
, *mount_flags
);
1548 replace_mount_options(s
, new_opts
);
1552 reiserfs_write_unlock(s
);
1558 static int read_super_block(struct super_block
*s
, int offset
)
1560 struct buffer_head
*bh
;
1561 struct reiserfs_super_block
*rs
;
1564 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1566 reiserfs_warning(s
, "sh-2006",
1567 "bread failed (dev %s, block %lu, size %lu)",
1568 s
->s_id
, offset
/ s
->s_blocksize
,
1573 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1574 if (!is_any_reiserfs_magic_string(rs
)) {
1579 * ok, reiserfs signature (old or new) found in at the given offset
1581 fs_blocksize
= sb_blocksize(rs
);
1583 sb_set_blocksize(s
, fs_blocksize
);
1585 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1587 reiserfs_warning(s
, "sh-2007",
1588 "bread failed (dev %s, block %lu, size %lu)",
1589 s
->s_id
, offset
/ s
->s_blocksize
,
1594 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1595 if (sb_blocksize(rs
) != s
->s_blocksize
) {
1596 reiserfs_warning(s
, "sh-2011", "can't find a reiserfs "
1597 "filesystem on (dev %s, block %llu, size %lu)",
1599 (unsigned long long)bh
->b_blocknr
,
1605 if (rs
->s_v1
.s_root_block
== cpu_to_le32(-1)) {
1607 reiserfs_warning(s
, "super-6519", "Unfinished reiserfsck "
1608 "--rebuild-tree run detected. Please run\n"
1609 "reiserfsck --rebuild-tree and wait for a "
1610 "completion. If that fails\n"
1611 "get newer reiserfsprogs package");
1615 SB_BUFFER_WITH_SB(s
) = bh
;
1616 SB_DISK_SUPER_BLOCK(s
) = rs
;
1619 * magic is of non-standard journal filesystem, look at s_version to
1620 * find which format is in use
1622 if (is_reiserfs_jr(rs
)) {
1623 if (sb_version(rs
) == REISERFS_VERSION_2
)
1624 reiserfs_info(s
, "found reiserfs format \"3.6\""
1625 " with non-standard journal\n");
1626 else if (sb_version(rs
) == REISERFS_VERSION_1
)
1627 reiserfs_info(s
, "found reiserfs format \"3.5\""
1628 " with non-standard journal\n");
1630 reiserfs_warning(s
, "sh-2012", "found unknown "
1631 "format \"%u\" of reiserfs with "
1632 "non-standard magic", sb_version(rs
));
1637 * s_version of standard format may contain incorrect
1638 * information, so we just look at the magic string
1641 "found reiserfs format \"%s\" with standard journal\n",
1642 is_reiserfs_3_5(rs
) ? "3.5" : "3.6");
1644 s
->s_op
= &reiserfs_sops
;
1645 s
->s_export_op
= &reiserfs_export_ops
;
1647 s
->s_qcop
= &reiserfs_qctl_operations
;
1648 s
->dq_op
= &reiserfs_quota_operations
;
1649 s
->s_quota_types
= QTYPE_MASK_USR
| QTYPE_MASK_GRP
;
1653 * new format is limited by the 32 bit wide i_blocks field, want to
1654 * be one full block below that.
1656 s
->s_maxbytes
= (512LL << 32) - s
->s_blocksize
;
1660 /* after journal replay, reread all bitmap and super blocks */
1661 static int reread_meta_blocks(struct super_block
*s
)
1663 ll_rw_block(READ
, 1, &SB_BUFFER_WITH_SB(s
));
1664 wait_on_buffer(SB_BUFFER_WITH_SB(s
));
1665 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s
))) {
1666 reiserfs_warning(s
, "reiserfs-2504", "error reading the super");
1673 /* hash detection stuff */
1676 * if root directory is empty - we set default - Yura's - hash and
1678 * FIXME: we look for only one name in a directory. If tea and yura
1679 * both have the same value - we ask user to send report to the
1682 static __u32
find_hash_out(struct super_block
*s
)
1685 struct inode
*inode
;
1687 INITIALIZE_PATH(path
);
1688 struct reiserfs_dir_entry de
;
1689 struct reiserfs_de_head
*deh
;
1690 __u32 hash
= DEFAULT_HASH
;
1691 __u32 deh_hashval
, teahash
, r5hash
, yurahash
;
1693 inode
= d_inode(s
->s_root
);
1695 make_cpu_key(&key
, inode
, ~0, TYPE_DIRENTRY
, 3);
1696 retval
= search_by_entry_key(s
, &key
, &path
, &de
);
1697 if (retval
== IO_ERROR
) {
1701 if (retval
== NAME_NOT_FOUND
)
1704 set_de_name_and_namelen(&de
);
1705 deh
= de
.de_deh
+ de
.de_entry_num
;
1707 if (deh_offset(deh
) == DOT_DOT_OFFSET
) {
1708 /* allow override in this case */
1709 if (reiserfs_rupasov_hash(s
))
1711 reiserfs_info(s
, "FS seems to be empty, autodetect is using the default hash\n");
1715 deh_hashval
= GET_HASH_VALUE(deh_offset(deh
));
1716 r5hash
= GET_HASH_VALUE(r5_hash(de
.de_name
, de
.de_namelen
));
1717 teahash
= GET_HASH_VALUE(keyed_hash(de
.de_name
, de
.de_namelen
));
1718 yurahash
= GET_HASH_VALUE(yura_hash(de
.de_name
, de
.de_namelen
));
1720 if ((teahash
== r5hash
&& deh_hashval
== r5hash
) ||
1721 (teahash
== yurahash
&& deh_hashval
== yurahash
) ||
1722 (r5hash
== yurahash
&& deh_hashval
== yurahash
)) {
1723 reiserfs_warning(s
, "reiserfs-2506",
1724 "Unable to automatically detect hash "
1725 "function. Please mount with -o "
1726 "hash={tea,rupasov,r5}");
1731 if (deh_hashval
== yurahash
)
1733 else if (deh_hashval
== teahash
)
1735 else if (deh_hashval
== r5hash
)
1738 reiserfs_warning(s
, "reiserfs-2506",
1739 "Unrecognised hash function");
1747 /* finds out which hash names are sorted with */
1748 static int what_hash(struct super_block
*s
)
1752 code
= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
));
1755 * reiserfs_hash_detect() == true if any of the hash mount options
1756 * were used. We must check them to make sure the user isn't
1757 * using a bad hash value
1759 if (code
== UNSET_HASH
|| reiserfs_hash_detect(s
))
1760 code
= find_hash_out(s
);
1762 if (code
!= UNSET_HASH
&& reiserfs_hash_detect(s
)) {
1764 * detection has found the hash, and we must check against the
1767 if (reiserfs_rupasov_hash(s
) && code
!= YURA_HASH
) {
1768 reiserfs_warning(s
, "reiserfs-2507",
1769 "Error, %s hash detected, "
1770 "unable to force rupasov hash",
1771 reiserfs_hashname(code
));
1773 } else if (reiserfs_tea_hash(s
) && code
!= TEA_HASH
) {
1774 reiserfs_warning(s
, "reiserfs-2508",
1775 "Error, %s hash detected, "
1776 "unable to force tea hash",
1777 reiserfs_hashname(code
));
1779 } else if (reiserfs_r5_hash(s
) && code
!= R5_HASH
) {
1780 reiserfs_warning(s
, "reiserfs-2509",
1781 "Error, %s hash detected, "
1782 "unable to force r5 hash",
1783 reiserfs_hashname(code
));
1788 * find_hash_out was not called or
1789 * could not determine the hash
1791 if (reiserfs_rupasov_hash(s
)) {
1793 } else if (reiserfs_tea_hash(s
)) {
1795 } else if (reiserfs_r5_hash(s
)) {
1801 * if we are mounted RW, and we have a new valid hash code, update
1804 if (code
!= UNSET_HASH
&&
1805 !(s
->s_flags
& MS_RDONLY
) &&
1806 code
!= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
))) {
1807 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
), code
);
1812 /* return pointer to appropriate function */
1813 static hashf_t
hash_function(struct super_block
*s
)
1815 switch (what_hash(s
)) {
1817 reiserfs_info(s
, "Using tea hash to sort names\n");
1820 reiserfs_info(s
, "Using rupasov hash to sort names\n");
1823 reiserfs_info(s
, "Using r5 hash to sort names\n");
1829 /* this is used to set up correct value for old partitions */
1830 static int function2code(hashf_t func
)
1832 if (func
== keyed_hash
)
1834 if (func
== yura_hash
)
1836 if (func
== r5_hash
)
1839 BUG(); /* should never happen */
1844 #define SWARN(silent, s, id, ...) \
1846 reiserfs_warning(s, id, __VA_ARGS__)
1848 static int reiserfs_fill_super(struct super_block
*s
, void *data
, int silent
)
1850 struct inode
*root_inode
;
1851 struct reiserfs_transaction_handle th
;
1853 unsigned long blocks
;
1854 unsigned int commit_max_age
= 0;
1856 struct reiserfs_iget_args args
;
1857 struct reiserfs_super_block
*rs
;
1859 struct reiserfs_sb_info
*sbi
;
1860 int errval
= -EINVAL
;
1861 char *qf_names
[REISERFS_MAXQUOTAS
] = {};
1862 unsigned int qfmt
= 0;
1864 save_mount_options(s
, data
);
1866 sbi
= kzalloc(sizeof(struct reiserfs_sb_info
), GFP_KERNEL
);
1870 /* Set default values for options: non-aggressive tails, RO on errors */
1871 sbi
->s_mount_opt
|= (1 << REISERFS_SMALLTAIL
);
1872 sbi
->s_mount_opt
|= (1 << REISERFS_ERROR_RO
);
1873 sbi
->s_mount_opt
|= (1 << REISERFS_BARRIER_FLUSH
);
1874 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1875 sbi
->s_alloc_options
.preallocmin
= 0;
1876 /* Preallocate by 16 blocks (17-1) at once */
1877 sbi
->s_alloc_options
.preallocsize
= 17;
1878 /* setup default block allocator options */
1879 reiserfs_init_alloc_options(s
);
1881 spin_lock_init(&sbi
->old_work_lock
);
1882 INIT_DELAYED_WORK(&sbi
->old_work
, flush_old_commits
);
1883 mutex_init(&sbi
->lock
);
1884 sbi
->lock_depth
= -1;
1886 sbi
->commit_wq
= alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM
, 0,
1888 if (!sbi
->commit_wq
) {
1889 SWARN(silent
, s
, "", "Cannot allocate commit workqueue");
1891 goto error_unlocked
;
1895 if (reiserfs_parse_options
1896 (s
, (char *)data
, &sbi
->s_mount_opt
, &blocks
, &jdev_name
,
1897 &commit_max_age
, qf_names
, &qfmt
) == 0) {
1898 goto error_unlocked
;
1900 if (jdev_name
&& jdev_name
[0]) {
1901 sbi
->s_jdev
= kstrdup(jdev_name
, GFP_KERNEL
);
1903 SWARN(silent
, s
, "", "Cannot allocate memory for "
1904 "journal device name");
1909 handle_quota_files(s
, qf_names
, &qfmt
);
1913 SWARN(silent
, s
, "jmacd-7", "resize option for remount only");
1914 goto error_unlocked
;
1918 * try old format (undistributed bitmap, super block in 8-th 1k
1919 * block of a device)
1921 if (!read_super_block(s
, REISERFS_OLD_DISK_OFFSET_IN_BYTES
))
1925 * try new format (64-th 1k block), which can contain reiserfs
1928 else if (read_super_block(s
, REISERFS_DISK_OFFSET_IN_BYTES
)) {
1929 SWARN(silent
, s
, "sh-2021", "can not find reiserfs on %s",
1931 goto error_unlocked
;
1934 rs
= SB_DISK_SUPER_BLOCK(s
);
1936 * Let's do basic sanity check to verify that underlying device is not
1937 * smaller than the filesystem. If the check fails then abort and
1938 * scream, because bad stuff will happen otherwise.
1940 if (s
->s_bdev
&& s
->s_bdev
->bd_inode
1941 && i_size_read(s
->s_bdev
->bd_inode
) <
1942 sb_block_count(rs
) * sb_blocksize(rs
)) {
1943 SWARN(silent
, s
, "", "Filesystem cannot be "
1944 "mounted because it is bigger than the device");
1945 SWARN(silent
, s
, "", "You may need to run fsck "
1946 "or increase size of your LVM partition");
1947 SWARN(silent
, s
, "", "Or may be you forgot to "
1948 "reboot after fdisk when it told you to");
1949 goto error_unlocked
;
1952 sbi
->s_mount_state
= SB_REISERFS_STATE(s
);
1953 sbi
->s_mount_state
= REISERFS_VALID_FS
;
1955 if ((errval
= reiserfs_init_bitmap_cache(s
))) {
1956 SWARN(silent
, s
, "jmacd-8", "unable to read bitmap");
1957 goto error_unlocked
;
1961 #ifdef CONFIG_REISERFS_CHECK
1962 SWARN(silent
, s
, "", "CONFIG_REISERFS_CHECK is set ON");
1963 SWARN(silent
, s
, "", "- it is slow mode for debugging.");
1966 /* make data=ordered the default */
1967 if (!reiserfs_data_log(s
) && !reiserfs_data_ordered(s
) &&
1968 !reiserfs_data_writeback(s
)) {
1969 sbi
->s_mount_opt
|= (1 << REISERFS_DATA_ORDERED
);
1972 if (reiserfs_data_log(s
)) {
1973 reiserfs_info(s
, "using journaled data mode\n");
1974 } else if (reiserfs_data_ordered(s
)) {
1975 reiserfs_info(s
, "using ordered data mode\n");
1977 reiserfs_info(s
, "using writeback data mode\n");
1979 if (reiserfs_barrier_flush(s
)) {
1980 printk("reiserfs: using flush barriers\n");
1983 if (journal_init(s
, jdev_name
, old_format
, commit_max_age
)) {
1984 SWARN(silent
, s
, "sh-2022",
1985 "unable to initialize journal space");
1986 goto error_unlocked
;
1989 * once this is set, journal_release must be called
1990 * if we error out of the mount
1995 if (reread_meta_blocks(s
)) {
1996 SWARN(silent
, s
, "jmacd-9",
1997 "unable to reread meta blocks after journal init");
1998 goto error_unlocked
;
2002 goto error_unlocked
;
2004 if (bdev_read_only(s
->s_bdev
) && !(s
->s_flags
& MS_RDONLY
)) {
2005 SWARN(silent
, s
, "clm-7000",
2006 "Detected readonly device, marking FS readonly");
2007 s
->s_flags
|= MS_RDONLY
;
2009 args
.objectid
= REISERFS_ROOT_OBJECTID
;
2010 args
.dirid
= REISERFS_ROOT_PARENT_OBJECTID
;
2012 iget5_locked(s
, REISERFS_ROOT_OBJECTID
, reiserfs_find_actor
,
2013 reiserfs_init_locked_inode
, (void *)&args
);
2015 SWARN(silent
, s
, "jmacd-10", "get root inode failed");
2016 goto error_unlocked
;
2020 * This path assumed to be called with the BKL in the old times.
2021 * Now we have inherited the big reiserfs lock from it and many
2022 * reiserfs helpers called in the mount path and elsewhere require
2023 * this lock to be held even if it's not always necessary. Let's be
2024 * conservative and hold it early. The window can be reduced after
2025 * careful review of the code.
2027 reiserfs_write_lock(s
);
2029 if (root_inode
->i_state
& I_NEW
) {
2030 reiserfs_read_locked_inode(root_inode
, &args
);
2031 unlock_new_inode(root_inode
);
2034 s
->s_root
= d_make_root(root_inode
);
2037 /* define and initialize hash function */
2038 sbi
->s_hash_function
= hash_function(s
);
2039 if (sbi
->s_hash_function
== NULL
) {
2045 if (is_reiserfs_3_5(rs
)
2046 || (is_reiserfs_jr(rs
) && SB_VERSION(s
) == REISERFS_VERSION_1
))
2047 set_bit(REISERFS_3_5
, &sbi
->s_properties
);
2048 else if (old_format
)
2049 set_bit(REISERFS_OLD_FORMAT
, &sbi
->s_properties
);
2051 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2053 if (!(s
->s_flags
& MS_RDONLY
)) {
2055 errval
= journal_begin(&th
, s
, 1);
2061 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
2063 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
2064 set_sb_fs_state(rs
, 0);
2067 * Clear out s_bmap_nr if it would wrap. We can handle this
2068 * case, but older revisions can't. This will cause the
2069 * file system to fail mount on those older implementations,
2070 * avoiding corruption. -jeffm
2072 if (bmap_would_wrap(reiserfs_bmap_count(s
)) &&
2073 sb_bmap_nr(rs
) != 0) {
2074 reiserfs_warning(s
, "super-2030", "This file system "
2075 "claims to use %u bitmap blocks in "
2076 "its super block, but requires %u. "
2077 "Clearing to zero.", sb_bmap_nr(rs
),
2078 reiserfs_bmap_count(s
));
2080 set_sb_bmap_nr(rs
, 0);
2083 if (old_format_only(s
)) {
2085 * filesystem of format 3.5 either with standard
2086 * or non-standard journal
2088 if (convert_reiserfs(s
)) {
2089 /* and -o conv is given */
2092 "converting 3.5 filesystem to the 3.6 format");
2094 if (is_reiserfs_3_5(rs
))
2096 * put magic string of 3.6 format.
2097 * 2.2 will not be able to
2098 * mount this filesystem anymore
2100 memcpy(rs
->s_v1
.s_magic
,
2101 reiserfs_3_6_magic_string
,
2103 (reiserfs_3_6_magic_string
));
2105 set_sb_version(rs
, REISERFS_VERSION_2
);
2106 reiserfs_convert_objectid_map_v1(s
);
2107 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2108 clear_bit(REISERFS_3_5
, &sbi
->s_properties
);
2109 } else if (!silent
) {
2110 reiserfs_info(s
, "using 3.5.x disk format\n");
2113 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
2116 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
2117 errval
= journal_end(&th
);
2124 reiserfs_write_unlock(s
);
2125 if ((errval
= reiserfs_lookup_privroot(s
)) ||
2126 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
2129 goto error_unlocked
;
2131 reiserfs_write_lock(s
);
2134 * look for files which were to be removed in previous session
2136 finish_unfinished(s
);
2138 if (old_format_only(s
) && !silent
) {
2139 reiserfs_info(s
, "using 3.5.x disk format\n");
2142 reiserfs_write_unlock(s
);
2143 if ((errval
= reiserfs_lookup_privroot(s
)) ||
2144 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
2147 goto error_unlocked
;
2149 reiserfs_write_lock(s
);
2152 * mark hash in super block: it could be unset. overwrite should be ok
2154 set_sb_hash_function_code(rs
, function2code(sbi
->s_hash_function
));
2158 reiserfs_proc_info_init(s
);
2160 init_waitqueue_head(&(sbi
->s_wait
));
2161 spin_lock_init(&sbi
->bitmap_lock
);
2163 reiserfs_write_unlock(s
);
2168 reiserfs_write_unlock(s
);
2171 /* kill the commit thread, free journal ram */
2173 reiserfs_write_lock(s
);
2174 journal_release_error(NULL
, s
);
2175 reiserfs_write_unlock(s
);
2179 destroy_workqueue(sbi
->commit_wq
);
2181 cancel_delayed_work_sync(&REISERFS_SB(s
)->old_work
);
2183 reiserfs_free_bitmap_cache(s
);
2184 if (SB_BUFFER_WITH_SB(s
))
2185 brelse(SB_BUFFER_WITH_SB(s
));
2189 for (j
= 0; j
< REISERFS_MAXQUOTAS
; j
++)
2195 s
->s_fs_info
= NULL
;
2199 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2201 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(dentry
->d_sb
);
2203 buf
->f_namelen
= (REISERFS_MAX_NAME(s
->s_blocksize
));
2204 buf
->f_bfree
= sb_free_blocks(rs
);
2205 buf
->f_bavail
= buf
->f_bfree
;
2206 buf
->f_blocks
= sb_block_count(rs
) - sb_bmap_nr(rs
) - 1;
2207 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
2208 /* changed to accommodate gcc folks. */
2209 buf
->f_type
= REISERFS_SUPER_MAGIC
;
2210 buf
->f_fsid
.val
[0] = (u32
)crc32_le(0, rs
->s_uuid
, sizeof(rs
->s_uuid
)/2);
2211 buf
->f_fsid
.val
[1] = (u32
)crc32_le(0, rs
->s_uuid
+ sizeof(rs
->s_uuid
)/2,
2212 sizeof(rs
->s_uuid
)/2);
2218 static int reiserfs_write_dquot(struct dquot
*dquot
)
2220 struct reiserfs_transaction_handle th
;
2224 reiserfs_write_lock(dquot
->dq_sb
);
2226 journal_begin(&th
, dquot
->dq_sb
,
2227 REISERFS_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2230 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2231 ret
= dquot_commit(dquot
);
2232 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2233 err
= journal_end(&th
);
2237 reiserfs_write_unlock(dquot
->dq_sb
);
2241 static int reiserfs_acquire_dquot(struct dquot
*dquot
)
2243 struct reiserfs_transaction_handle th
;
2247 reiserfs_write_lock(dquot
->dq_sb
);
2249 journal_begin(&th
, dquot
->dq_sb
,
2250 REISERFS_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2253 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2254 ret
= dquot_acquire(dquot
);
2255 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2256 err
= journal_end(&th
);
2260 reiserfs_write_unlock(dquot
->dq_sb
);
2264 static int reiserfs_release_dquot(struct dquot
*dquot
)
2266 struct reiserfs_transaction_handle th
;
2269 reiserfs_write_lock(dquot
->dq_sb
);
2271 journal_begin(&th
, dquot
->dq_sb
,
2272 REISERFS_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2273 reiserfs_write_unlock(dquot
->dq_sb
);
2275 /* Release dquot anyway to avoid endless cycle in dqput() */
2276 dquot_release(dquot
);
2279 ret
= dquot_release(dquot
);
2280 reiserfs_write_lock(dquot
->dq_sb
);
2281 err
= journal_end(&th
);
2284 reiserfs_write_unlock(dquot
->dq_sb
);
2289 static int reiserfs_mark_dquot_dirty(struct dquot
*dquot
)
2291 /* Are we journaling quotas? */
2292 if (REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2293 REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2294 dquot_mark_dquot_dirty(dquot
);
2295 return reiserfs_write_dquot(dquot
);
2297 return dquot_mark_dquot_dirty(dquot
);
2300 static int reiserfs_write_info(struct super_block
*sb
, int type
)
2302 struct reiserfs_transaction_handle th
;
2306 /* Data block + inode block */
2307 reiserfs_write_lock(sb
);
2308 ret
= journal_begin(&th
, sb
, 2);
2311 depth
= reiserfs_write_unlock_nested(sb
);
2312 ret
= dquot_commit_info(sb
, type
);
2313 reiserfs_write_lock_nested(sb
, depth
);
2314 err
= journal_end(&th
);
2318 reiserfs_write_unlock(sb
);
2323 * Turn on quotas during mount time - we need to find the quota file and such...
2325 static int reiserfs_quota_on_mount(struct super_block
*sb
, int type
)
2327 return dquot_quota_on_mount(sb
, REISERFS_SB(sb
)->s_qf_names
[type
],
2328 REISERFS_SB(sb
)->s_jquota_fmt
, type
);
2332 * Standard function to be called on quota_on
2334 static int reiserfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
2338 struct inode
*inode
;
2339 struct reiserfs_transaction_handle th
;
2340 int opt
= type
== USRQUOTA
? REISERFS_USRQUOTA
: REISERFS_GRPQUOTA
;
2342 reiserfs_write_lock(sb
);
2343 if (!(REISERFS_SB(sb
)->s_mount_opt
& (1 << opt
))) {
2348 /* Quotafile not on the same filesystem? */
2349 if (path
->dentry
->d_sb
!= sb
) {
2353 inode
= d_inode(path
->dentry
);
2355 * We must not pack tails for quota files on reiserfs for quota
2358 if (!(REISERFS_I(inode
)->i_flags
& i_nopack_mask
)) {
2359 err
= reiserfs_unpack(inode
, NULL
);
2361 reiserfs_warning(sb
, "super-6520",
2362 "Unpacking tail of quota file failed"
2363 " (%d). Cannot turn on quotas.", err
);
2367 mark_inode_dirty(inode
);
2369 /* Journaling quota? */
2370 if (REISERFS_SB(sb
)->s_qf_names
[type
]) {
2371 /* Quotafile not of fs root? */
2372 if (path
->dentry
->d_parent
!= sb
->s_root
)
2373 reiserfs_warning(sb
, "super-6521",
2374 "Quota file not on filesystem root. "
2375 "Journalled quota will not work.");
2379 * When we journal data on quota file, we have to flush journal to see
2380 * all updates to the file when we bypass pagecache...
2382 if (reiserfs_file_data_log(inode
)) {
2383 /* Just start temporary transaction and finish it */
2384 err
= journal_begin(&th
, sb
, 1);
2387 err
= journal_end_sync(&th
);
2391 reiserfs_write_unlock(sb
);
2392 return dquot_quota_on(sb
, type
, format_id
, path
);
2394 reiserfs_write_unlock(sb
);
2399 * Read data from quotafile - avoid pagecache and such because we cannot afford
2400 * acquiring the locks... As quota files are never truncated and quota code
2401 * itself serializes the operations (and no one else should touch the files)
2402 * we don't have to be afraid of races
2404 static ssize_t
reiserfs_quota_read(struct super_block
*sb
, int type
, char *data
,
2405 size_t len
, loff_t off
)
2407 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2408 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2409 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2411 struct buffer_head tmp_bh
, *bh
;
2412 loff_t i_size
= i_size_read(inode
);
2416 if (off
+ len
> i_size
)
2419 while (toread
> 0) {
2421 sb
->s_blocksize
- offset
<
2422 toread
? sb
->s_blocksize
- offset
: toread
;
2425 * Quota files are without tails so we can safely
2428 reiserfs_write_lock(sb
);
2429 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, 0);
2430 reiserfs_write_unlock(sb
);
2433 if (!buffer_mapped(&tmp_bh
)) /* A hole? */
2434 memset(data
, 0, tocopy
);
2436 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2439 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
2451 * Write to quotafile (we know the transaction is already started and has
2454 static ssize_t
reiserfs_quota_write(struct super_block
*sb
, int type
,
2455 const char *data
, size_t len
, loff_t off
)
2457 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2458 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2459 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2460 int journal_quota
= REISERFS_SB(sb
)->s_qf_names
[type
] != NULL
;
2461 size_t towrite
= len
;
2462 struct buffer_head tmp_bh
, *bh
;
2464 if (!current
->journal_info
) {
2465 printk(KERN_WARNING
"reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2466 (unsigned long long)off
, (unsigned long long)len
);
2469 while (towrite
> 0) {
2470 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2471 sb
->s_blocksize
- offset
: towrite
;
2473 reiserfs_write_lock(sb
);
2474 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, GET_BLOCK_CREATE
);
2475 reiserfs_write_unlock(sb
);
2478 if (offset
|| tocopy
!= sb
->s_blocksize
)
2479 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2481 bh
= sb_getblk(sb
, tmp_bh
.b_blocknr
);
2487 memcpy(bh
->b_data
+ offset
, data
, tocopy
);
2488 flush_dcache_page(bh
->b_page
);
2489 set_buffer_uptodate(bh
);
2491 reiserfs_write_lock(sb
);
2492 reiserfs_prepare_for_journal(sb
, bh
, 1);
2493 journal_mark_dirty(current
->journal_info
, bh
);
2495 reiserfs_add_ordered_list(inode
, bh
);
2496 reiserfs_write_unlock(sb
);
2506 if (inode
->i_size
< off
+ len
- towrite
)
2507 i_size_write(inode
, off
+ len
- towrite
);
2509 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2510 mark_inode_dirty(inode
);
2511 return len
- towrite
;
2516 static struct dentry
*get_super_block(struct file_system_type
*fs_type
,
2517 int flags
, const char *dev_name
,
2520 return mount_bdev(fs_type
, flags
, dev_name
, data
, reiserfs_fill_super
);
2523 static int __init
init_reiserfs_fs(void)
2527 ret
= init_inodecache();
2531 reiserfs_proc_info_global_init();
2533 ret
= register_filesystem(&reiserfs_fs_type
);
2539 reiserfs_proc_info_global_done();
2540 destroy_inodecache();
2545 static void __exit
exit_reiserfs_fs(void)
2547 reiserfs_proc_info_global_done();
2548 unregister_filesystem(&reiserfs_fs_type
);
2549 destroy_inodecache();
2552 struct file_system_type reiserfs_fs_type
= {
2553 .owner
= THIS_MODULE
,
2555 .mount
= get_super_block
,
2556 .kill_sb
= reiserfs_kill_sb
,
2557 .fs_flags
= FS_REQUIRES_DEV
,
2559 MODULE_ALIAS_FS("reiserfs");
2561 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2562 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2563 MODULE_LICENSE("GPL");
2565 module_init(init_reiserfs_fs
);
2566 module_exit(exit_reiserfs_fs
);