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 <asm/uaccess.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/buffer_head.h>
25 #include <linux/exportfs.h>
26 #include <linux/quotaops.h>
27 #include <linux/vfs.h>
28 #include <linux/mount.h>
29 #include <linux/namei.h>
30 #include <linux/crc32.h>
31 #include <linux/seq_file.h>
33 struct file_system_type reiserfs_fs_type
;
35 static const char reiserfs_3_5_magic_string
[] = REISERFS_SUPER_MAGIC_STRING
;
36 static const char reiserfs_3_6_magic_string
[] = REISER2FS_SUPER_MAGIC_STRING
;
37 static const char reiserfs_jr_magic_string
[] = REISER2FS_JR_SUPER_MAGIC_STRING
;
39 int is_reiserfs_3_5(struct reiserfs_super_block
*rs
)
41 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_5_magic_string
,
42 strlen(reiserfs_3_5_magic_string
));
45 int is_reiserfs_3_6(struct reiserfs_super_block
*rs
)
47 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_6_magic_string
,
48 strlen(reiserfs_3_6_magic_string
));
51 int is_reiserfs_jr(struct reiserfs_super_block
*rs
)
53 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_jr_magic_string
,
54 strlen(reiserfs_jr_magic_string
));
57 static int is_any_reiserfs_magic_string(struct reiserfs_super_block
*rs
)
59 return (is_reiserfs_3_5(rs
) || is_reiserfs_3_6(rs
) ||
63 static int reiserfs_remount(struct super_block
*s
, int *flags
, char *data
);
64 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
);
66 static int reiserfs_sync_fs(struct super_block
*s
, int wait
)
68 struct reiserfs_transaction_handle th
;
71 * Writeback quota in non-journalled quota case - journalled quota has
74 dquot_writeback_dquots(s
, -1);
75 reiserfs_write_lock(s
);
76 if (!journal_begin(&th
, s
, 1))
77 if (!journal_end_sync(&th
))
78 reiserfs_flush_old_commits(s
);
79 reiserfs_write_unlock(s
);
83 static void flush_old_commits(struct work_struct
*work
)
85 struct reiserfs_sb_info
*sbi
;
86 struct super_block
*s
;
88 sbi
= container_of(work
, struct reiserfs_sb_info
, old_work
.work
);
89 s
= sbi
->s_journal
->j_work_sb
;
91 spin_lock(&sbi
->old_work_lock
);
93 spin_unlock(&sbi
->old_work_lock
);
95 reiserfs_sync_fs(s
, 1);
98 void reiserfs_schedule_old_flush(struct super_block
*s
)
100 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
103 if (s
->s_flags
& MS_RDONLY
)
106 spin_lock(&sbi
->old_work_lock
);
107 if (!sbi
->work_queued
) {
108 delay
= msecs_to_jiffies(dirty_writeback_interval
* 10);
109 queue_delayed_work(system_long_wq
, &sbi
->old_work
, delay
);
110 sbi
->work_queued
= 1;
112 spin_unlock(&sbi
->old_work_lock
);
115 static void cancel_old_flush(struct super_block
*s
)
117 struct reiserfs_sb_info
*sbi
= REISERFS_SB(s
);
119 cancel_delayed_work_sync(&REISERFS_SB(s
)->old_work
);
120 spin_lock(&sbi
->old_work_lock
);
121 sbi
->work_queued
= 0;
122 spin_unlock(&sbi
->old_work_lock
);
125 static int reiserfs_freeze(struct super_block
*s
)
127 struct reiserfs_transaction_handle th
;
131 reiserfs_write_lock(s
);
132 if (!(s
->s_flags
& MS_RDONLY
)) {
133 int err
= journal_begin(&th
, s
, 1);
135 reiserfs_block_writes(&th
);
137 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
139 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
140 reiserfs_block_writes(&th
);
141 journal_end_sync(&th
);
144 reiserfs_write_unlock(s
);
148 static int reiserfs_unfreeze(struct super_block
*s
)
150 reiserfs_allow_writes(s
);
154 extern const struct in_core_key MAX_IN_CORE_KEY
;
157 * this is used to delete "save link" when there are no items of a
158 * file it points to. It can either happen if unlink is completed but
159 * "save unlink" removal, or if file has both unlink and truncate
160 * pending and as unlink completes first (because key of "save link"
161 * protecting unlink is bigger that a key lf "save link" which
162 * protects truncate), so there left no items to make truncate
165 static int remove_save_link_only(struct super_block
*s
,
166 struct reiserfs_key
*key
, int oid_free
)
168 struct reiserfs_transaction_handle th
;
171 /* we are going to do one balancing */
172 err
= journal_begin(&th
, s
, JOURNAL_PER_BALANCE_CNT
);
176 reiserfs_delete_solid_item(&th
, NULL
, key
);
178 /* removals are protected by direct items */
179 reiserfs_release_objectid(&th
, le32_to_cpu(key
->k_objectid
));
181 return journal_end(&th
);
185 static int reiserfs_quota_on_mount(struct super_block
*, int);
188 /* look for uncompleted unlinks and truncates and complete them */
189 static int finish_unfinished(struct super_block
*s
)
191 INITIALIZE_PATH(path
);
192 struct cpu_key max_cpu_key
, obj_key
;
193 struct reiserfs_key save_link_key
, last_inode_key
;
195 struct item_head
*ih
;
196 struct buffer_head
*bh
;
205 int quota_enabled
[MAXQUOTAS
];
208 /* compose key to look for "save" links */
209 max_cpu_key
.version
= KEY_FORMAT_3_5
;
210 max_cpu_key
.on_disk_key
.k_dir_id
= ~0U;
211 max_cpu_key
.on_disk_key
.k_objectid
= ~0U;
212 set_cpu_key_k_offset(&max_cpu_key
, ~0U);
213 max_cpu_key
.key_length
= 3;
215 memset(&last_inode_key
, 0, sizeof(last_inode_key
));
218 /* Needed for iput() to work correctly and not trash data */
219 if (s
->s_flags
& MS_ACTIVE
) {
223 s
->s_flags
|= MS_ACTIVE
;
225 /* Turn on quotas so that they are updated correctly */
226 for (i
= 0; i
< MAXQUOTAS
; i
++) {
227 quota_enabled
[i
] = 1;
228 if (REISERFS_SB(s
)->s_qf_names
[i
]) {
231 if (sb_has_quota_active(s
, i
)) {
232 quota_enabled
[i
] = 0;
235 ret
= reiserfs_quota_on_mount(s
, i
);
237 reiserfs_warning(s
, "reiserfs-2500",
238 "cannot turn on journaled "
239 "quota: error %d", ret
);
245 REISERFS_SB(s
)->s_is_unlinked_ok
= 1;
248 retval
= search_item(s
, &max_cpu_key
, &path
);
249 if (retval
!= ITEM_NOT_FOUND
) {
250 reiserfs_error(s
, "vs-2140",
251 "search_by_key returned %d", retval
);
255 bh
= get_last_bh(&path
);
256 item_pos
= get_item_pos(&path
);
257 if (item_pos
!= B_NR_ITEMS(bh
)) {
258 reiserfs_warning(s
, "vs-2060",
259 "wrong position found");
263 ih
= item_head(bh
, item_pos
);
265 if (le32_to_cpu(ih
->ih_key
.k_dir_id
) != MAX_KEY_OBJECTID
)
266 /* there are no "save" links anymore */
269 save_link_key
= ih
->ih_key
;
270 if (is_indirect_le_ih(ih
))
275 /* reiserfs_iget needs k_dirid and k_objectid only */
276 item
= ih_item_body(bh
, ih
);
277 obj_key
.on_disk_key
.k_dir_id
= le32_to_cpu(*(__le32
*) item
);
278 obj_key
.on_disk_key
.k_objectid
=
279 le32_to_cpu(ih
->ih_key
.k_objectid
);
280 obj_key
.on_disk_key
.k_offset
= 0;
281 obj_key
.on_disk_key
.k_type
= 0;
285 inode
= reiserfs_iget(s
, &obj_key
);
288 * the unlink almost completed, it just did not
289 * manage to remove "save" link and release objectid
291 reiserfs_warning(s
, "vs-2180", "iget failed for %K",
293 retval
= remove_save_link_only(s
, &save_link_key
, 1);
297 if (!truncate
&& inode
->i_nlink
) {
298 /* file is not unlinked */
299 reiserfs_warning(s
, "vs-2185",
300 "file %K is not unlinked",
302 retval
= remove_save_link_only(s
, &save_link_key
, 0);
305 depth
= reiserfs_write_unlock_nested(inode
->i_sb
);
306 dquot_initialize(inode
);
307 reiserfs_write_lock_nested(inode
->i_sb
, depth
);
309 if (truncate
&& S_ISDIR(inode
->i_mode
)) {
311 * We got a truncate request for a dir which
312 * is impossible. The only imaginable way is to
313 * execute unfinished truncate request then boot
314 * into old kernel, remove the file and create dir
317 reiserfs_warning(s
, "green-2101",
318 "impossible truncate on a "
319 "directory %k. Please report",
321 retval
= remove_save_link_only(s
, &save_link_key
, 0);
328 REISERFS_I(inode
)->i_flags
|=
329 i_link_saved_truncate_mask
;
331 * not completed truncate found. New size was
332 * committed together with "save" link
334 reiserfs_info(s
, "Truncating %k to %Ld ..",
335 INODE_PKEY(inode
), inode
->i_size
);
337 /* don't update modification time */
338 reiserfs_truncate_file(inode
, 0);
340 retval
= remove_save_link(inode
, truncate
);
342 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
343 /* not completed unlink (rmdir) found */
344 reiserfs_info(s
, "Removing %k..", INODE_PKEY(inode
));
345 if (memcmp(&last_inode_key
, INODE_PKEY(inode
),
346 sizeof(last_inode_key
))){
347 last_inode_key
= *INODE_PKEY(inode
);
348 /* removal gets completed in iput */
351 reiserfs_warning(s
, "super-2189", "Dead loop "
352 "in finish_unfinished "
353 "detected, just remove "
355 retval
= remove_save_link_only(s
,
364 REISERFS_SB(s
)->s_is_unlinked_ok
= 0;
367 /* Turn quotas off */
368 reiserfs_write_unlock(s
);
369 for (i
= 0; i
< MAXQUOTAS
; i
++) {
370 if (sb_dqopt(s
)->files
[i
] && quota_enabled
[i
])
371 dquot_quota_off(s
, i
);
373 reiserfs_write_lock(s
);
375 /* Restore the flag back */
376 s
->s_flags
&= ~MS_ACTIVE
;
380 reiserfs_info(s
, "There were %d uncompleted unlinks/truncates. "
381 "Completed\n", done
);
386 * to protect file being unlinked from getting lost we "safe" link files
387 * being unlinked. This link will be deleted in the same transaction with last
388 * item of file. mounting the filesystem we scan all these links and remove
389 * files which almost got lost
391 void add_save_link(struct reiserfs_transaction_handle
*th
,
392 struct inode
*inode
, int truncate
)
394 INITIALIZE_PATH(path
);
400 BUG_ON(!th
->t_trans_id
);
402 /* file can only get one "save link" of each kind */
404 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
),
405 "saved link already exists for truncated inode %lx",
408 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
),
409 "saved link already exists for unlinked inode %lx",
412 /* setup key of "save" link */
413 key
.version
= KEY_FORMAT_3_5
;
414 key
.on_disk_key
.k_dir_id
= MAX_KEY_OBJECTID
;
415 key
.on_disk_key
.k_objectid
= inode
->i_ino
;
417 /* unlink, rmdir, rename */
418 set_cpu_key_k_offset(&key
, 1 + inode
->i_sb
->s_blocksize
);
419 set_cpu_key_k_type(&key
, TYPE_DIRECT
);
421 /* item head of "safe" link */
422 make_le_item_head(&ih
, &key
, key
.version
,
423 1 + inode
->i_sb
->s_blocksize
, TYPE_DIRECT
,
424 4 /*length */ , 0xffff /*free space */ );
427 if (S_ISDIR(inode
->i_mode
))
428 reiserfs_warning(inode
->i_sb
, "green-2102",
429 "Adding a truncate savelink for "
430 "a directory %k! Please report",
432 set_cpu_key_k_offset(&key
, 1);
433 set_cpu_key_k_type(&key
, TYPE_INDIRECT
);
435 /* item head of "safe" link */
436 make_le_item_head(&ih
, &key
, key
.version
, 1, TYPE_INDIRECT
,
437 4 /*length */ , 0 /*free space */ );
441 /* look for its place in the tree */
442 retval
= search_item(inode
->i_sb
, &key
, &path
);
443 if (retval
!= ITEM_NOT_FOUND
) {
444 if (retval
!= -ENOSPC
)
445 reiserfs_error(inode
->i_sb
, "vs-2100",
446 "search_by_key (%K) returned %d", &key
,
452 /* body of "save" link */
453 link
= INODE_PKEY(inode
)->k_dir_id
;
455 /* put "save" link into tree, don't charge quota to anyone */
457 reiserfs_insert_item(th
, &path
, &key
, &ih
, NULL
, (char *)&link
);
459 if (retval
!= -ENOSPC
)
460 reiserfs_error(inode
->i_sb
, "vs-2120",
461 "insert_item returned %d", retval
);
464 REISERFS_I(inode
)->i_flags
|=
465 i_link_saved_truncate_mask
;
467 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
471 /* this opens transaction unlike add_save_link */
472 int remove_save_link(struct inode
*inode
, int truncate
)
474 struct reiserfs_transaction_handle th
;
475 struct reiserfs_key key
;
478 /* we are going to do one balancing only */
479 err
= journal_begin(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
);
483 /* setup key of "save" link */
484 key
.k_dir_id
= cpu_to_le32(MAX_KEY_OBJECTID
);
485 key
.k_objectid
= INODE_PKEY(inode
)->k_objectid
;
487 /* unlink, rmdir, rename */
488 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
,
489 1 + inode
->i_sb
->s_blocksize
);
490 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_DIRECT
);
493 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
, 1);
494 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_INDIRECT
);
498 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
)) ||
500 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
)))
501 /* don't take quota bytes from anywhere */
502 reiserfs_delete_solid_item(&th
, NULL
, &key
);
504 reiserfs_release_objectid(&th
, inode
->i_ino
);
505 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_unlink_mask
;
507 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_truncate_mask
;
509 return journal_end(&th
);
512 static void reiserfs_kill_sb(struct super_block
*s
)
514 if (REISERFS_SB(s
)) {
515 reiserfs_proc_info_done(s
);
517 * Force any pending inode evictions to occur now. Any
518 * inodes to be removed that have extended attributes
519 * associated with them need to clean them up before
520 * we can release the extended attribute root dentries.
521 * shrink_dcache_for_umount will BUG if we don't release
522 * those before it's called so ->put_super is too late.
526 dput(REISERFS_SB(s
)->xattr_root
);
527 REISERFS_SB(s
)->xattr_root
= NULL
;
528 dput(REISERFS_SB(s
)->priv_root
);
529 REISERFS_SB(s
)->priv_root
= NULL
;
535 static void reiserfs_put_super(struct super_block
*s
)
537 struct reiserfs_transaction_handle th
;
540 dquot_disable(s
, -1, DQUOT_USAGE_ENABLED
| DQUOT_LIMITS_ENABLED
);
542 reiserfs_write_lock(s
);
545 * change file system state to current state if it was mounted
546 * with read-write permissions
548 if (!(s
->s_flags
& MS_RDONLY
)) {
549 if (!journal_begin(&th
, s
, 10)) {
550 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
552 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s
),
553 REISERFS_SB(s
)->s_mount_state
);
554 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
559 * note, journal_release checks for readonly mount, and can
560 * decide not to do a journal_end
562 journal_release(&th
, s
);
564 reiserfs_free_bitmap_cache(s
);
566 brelse(SB_BUFFER_WITH_SB(s
));
570 if (REISERFS_SB(s
)->reserved_blocks
!= 0) {
571 reiserfs_warning(s
, "green-2005", "reserved blocks left %d",
572 REISERFS_SB(s
)->reserved_blocks
);
575 reiserfs_write_unlock(s
);
576 mutex_destroy(&REISERFS_SB(s
)->lock
);
577 destroy_workqueue(REISERFS_SB(s
)->commit_wq
);
582 static struct kmem_cache
*reiserfs_inode_cachep
;
584 static struct inode
*reiserfs_alloc_inode(struct super_block
*sb
)
586 struct reiserfs_inode_info
*ei
;
587 ei
= (struct reiserfs_inode_info
*)
588 kmem_cache_alloc(reiserfs_inode_cachep
, GFP_KERNEL
);
591 atomic_set(&ei
->openers
, 0);
592 mutex_init(&ei
->tailpack
);
593 return &ei
->vfs_inode
;
596 static void reiserfs_i_callback(struct rcu_head
*head
)
598 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
599 kmem_cache_free(reiserfs_inode_cachep
, REISERFS_I(inode
));
602 static void reiserfs_destroy_inode(struct inode
*inode
)
604 call_rcu(&inode
->i_rcu
, reiserfs_i_callback
);
607 static void init_once(void *foo
)
609 struct reiserfs_inode_info
*ei
= (struct reiserfs_inode_info
*)foo
;
611 INIT_LIST_HEAD(&ei
->i_prealloc_list
);
612 inode_init_once(&ei
->vfs_inode
);
615 static int __init
init_inodecache(void)
617 reiserfs_inode_cachep
= kmem_cache_create("reiser_inode_cache",
619 reiserfs_inode_info
),
620 0, (SLAB_RECLAIM_ACCOUNT
|
623 if (reiserfs_inode_cachep
== NULL
)
628 static void destroy_inodecache(void)
631 * Make sure all delayed rcu free inodes are flushed before we
635 kmem_cache_destroy(reiserfs_inode_cachep
);
638 /* we don't mark inodes dirty, we just log them */
639 static void reiserfs_dirty_inode(struct inode
*inode
, int flags
)
641 struct reiserfs_transaction_handle th
;
645 if (inode
->i_sb
->s_flags
& MS_RDONLY
) {
646 reiserfs_warning(inode
->i_sb
, "clm-6006",
647 "writing inode %lu on readonly FS",
651 reiserfs_write_lock(inode
->i_sb
);
654 * this is really only used for atime updates, so they don't have
655 * to be included in O_SYNC or fsync
657 err
= journal_begin(&th
, inode
->i_sb
, 1);
661 reiserfs_update_sd(&th
, inode
);
665 reiserfs_write_unlock(inode
->i_sb
);
668 static int reiserfs_show_options(struct seq_file
*seq
, struct dentry
*root
)
670 struct super_block
*s
= root
->d_sb
;
671 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
672 long opts
= REISERFS_SB(s
)->s_mount_opt
;
674 if (opts
& (1 << REISERFS_LARGETAIL
))
675 seq_puts(seq
, ",tails=on");
676 else if (!(opts
& (1 << REISERFS_SMALLTAIL
)))
677 seq_puts(seq
, ",notail");
678 /* tails=small is default so we don't show it */
680 if (!(opts
& (1 << REISERFS_BARRIER_FLUSH
)))
681 seq_puts(seq
, ",barrier=none");
682 /* barrier=flush is default so we don't show it */
684 if (opts
& (1 << REISERFS_ERROR_CONTINUE
))
685 seq_puts(seq
, ",errors=continue");
686 else if (opts
& (1 << REISERFS_ERROR_PANIC
))
687 seq_puts(seq
, ",errors=panic");
688 /* errors=ro is default so we don't show it */
690 if (opts
& (1 << REISERFS_DATA_LOG
))
691 seq_puts(seq
, ",data=journal");
692 else if (opts
& (1 << REISERFS_DATA_WRITEBACK
))
693 seq_puts(seq
, ",data=writeback");
694 /* data=ordered is default so we don't show it */
696 if (opts
& (1 << REISERFS_ATTRS
))
697 seq_puts(seq
, ",attrs");
699 if (opts
& (1 << REISERFS_XATTRS_USER
))
700 seq_puts(seq
, ",user_xattr");
702 if (opts
& (1 << REISERFS_EXPOSE_PRIVROOT
))
703 seq_puts(seq
, ",expose_privroot");
705 if (opts
& (1 << REISERFS_POSIXACL
))
706 seq_puts(seq
, ",acl");
708 if (REISERFS_SB(s
)->s_jdev
)
709 seq_printf(seq
, ",jdev=%s", REISERFS_SB(s
)->s_jdev
);
711 if (journal
->j_max_commit_age
!= journal
->j_default_max_commit_age
)
712 seq_printf(seq
, ",commit=%d", journal
->j_max_commit_age
);
715 if (REISERFS_SB(s
)->s_qf_names
[USRQUOTA
])
716 seq_printf(seq
, ",usrjquota=%s", REISERFS_SB(s
)->s_qf_names
[USRQUOTA
]);
717 else if (opts
& (1 << REISERFS_USRQUOTA
))
718 seq_puts(seq
, ",usrquota");
719 if (REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
])
720 seq_printf(seq
, ",grpjquota=%s", REISERFS_SB(s
)->s_qf_names
[GRPQUOTA
]);
721 else if (opts
& (1 << REISERFS_GRPQUOTA
))
722 seq_puts(seq
, ",grpquota");
723 if (REISERFS_SB(s
)->s_jquota_fmt
) {
724 if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_OLD
)
725 seq_puts(seq
, ",jqfmt=vfsold");
726 else if (REISERFS_SB(s
)->s_jquota_fmt
== QFMT_VFS_V0
)
727 seq_puts(seq
, ",jqfmt=vfsv0");
731 /* Block allocator options */
732 if (opts
& (1 << REISERFS_NO_BORDER
))
733 seq_puts(seq
, ",block-allocator=noborder");
734 if (opts
& (1 << REISERFS_NO_UNHASHED_RELOCATION
))
735 seq_puts(seq
, ",block-allocator=no_unhashed_relocation");
736 if (opts
& (1 << REISERFS_HASHED_RELOCATION
))
737 seq_puts(seq
, ",block-allocator=hashed_relocation");
738 if (opts
& (1 << REISERFS_TEST4
))
739 seq_puts(seq
, ",block-allocator=test4");
740 show_alloc_options(seq
, s
);
745 static ssize_t
reiserfs_quota_write(struct super_block
*, int, const char *,
747 static ssize_t
reiserfs_quota_read(struct super_block
*, int, char *, size_t,
751 static const struct super_operations reiserfs_sops
= {
752 .alloc_inode
= reiserfs_alloc_inode
,
753 .destroy_inode
= reiserfs_destroy_inode
,
754 .write_inode
= reiserfs_write_inode
,
755 .dirty_inode
= reiserfs_dirty_inode
,
756 .evict_inode
= reiserfs_evict_inode
,
757 .put_super
= reiserfs_put_super
,
758 .sync_fs
= reiserfs_sync_fs
,
759 .freeze_fs
= reiserfs_freeze
,
760 .unfreeze_fs
= reiserfs_unfreeze
,
761 .statfs
= reiserfs_statfs
,
762 .remount_fs
= reiserfs_remount
,
763 .show_options
= reiserfs_show_options
,
765 .quota_read
= reiserfs_quota_read
,
766 .quota_write
= reiserfs_quota_write
,
771 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
773 static int reiserfs_write_dquot(struct dquot
*);
774 static int reiserfs_acquire_dquot(struct dquot
*);
775 static int reiserfs_release_dquot(struct dquot
*);
776 static int reiserfs_mark_dquot_dirty(struct dquot
*);
777 static int reiserfs_write_info(struct super_block
*, int);
778 static int reiserfs_quota_on(struct super_block
*, int, int, struct path
*);
780 static const struct dquot_operations reiserfs_quota_operations
= {
781 .write_dquot
= reiserfs_write_dquot
,
782 .acquire_dquot
= reiserfs_acquire_dquot
,
783 .release_dquot
= reiserfs_release_dquot
,
784 .mark_dirty
= reiserfs_mark_dquot_dirty
,
785 .write_info
= reiserfs_write_info
,
786 .alloc_dquot
= dquot_alloc
,
787 .destroy_dquot
= dquot_destroy
,
790 static const struct quotactl_ops reiserfs_qctl_operations
= {
791 .quota_on
= reiserfs_quota_on
,
792 .quota_off
= dquot_quota_off
,
793 .quota_sync
= dquot_quota_sync
,
794 .get_info
= dquot_get_dqinfo
,
795 .set_info
= dquot_set_dqinfo
,
796 .get_dqblk
= dquot_get_dqblk
,
797 .set_dqblk
= dquot_set_dqblk
,
801 static const struct export_operations reiserfs_export_ops
= {
802 .encode_fh
= reiserfs_encode_fh
,
803 .fh_to_dentry
= reiserfs_fh_to_dentry
,
804 .fh_to_parent
= reiserfs_fh_to_parent
,
805 .get_parent
= reiserfs_get_parent
,
809 * this struct is used in reiserfs_getopt () for containing the value for
810 * those mount options that have values rather than being toggles.
815 * bitmask which is to set on mount_options bitmask
816 * when this value is found, 0 is no bits are to be changed.
820 * bitmask which is to clear on mount_options bitmask
821 * when this value is found, 0 is no bits are to be changed.
822 * This is applied BEFORE setmask
827 /* Set this bit in arg_required to allow empty arguments */
828 #define REISERFS_OPT_ALLOWEMPTY 31
831 * this struct is used in reiserfs_getopt() for describing the
832 * set of reiserfs mount options
837 /* 0 if argument is not required, not 0 otherwise */
840 /* list of values accepted by an option */
841 const arg_desc_t
*values
;
844 * bitmask which is to set on mount_options bitmask
845 * when this value is found, 0 is no bits are to be changed.
850 * bitmask which is to clear on mount_options bitmask
851 * when this value is found, 0 is no bits are to be changed.
852 * This is applied BEFORE setmask
857 /* possible values for -o data= */
858 static const arg_desc_t logging_mode
[] = {
859 {"ordered", 1 << REISERFS_DATA_ORDERED
,
860 (1 << REISERFS_DATA_LOG
| 1 << REISERFS_DATA_WRITEBACK
)},
861 {"journal", 1 << REISERFS_DATA_LOG
,
862 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_WRITEBACK
)},
863 {"writeback", 1 << REISERFS_DATA_WRITEBACK
,
864 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_LOG
)},
868 /* possible values for -o barrier= */
869 static const arg_desc_t barrier_mode
[] = {
870 {"none", 1 << REISERFS_BARRIER_NONE
, 1 << REISERFS_BARRIER_FLUSH
},
871 {"flush", 1 << REISERFS_BARRIER_FLUSH
, 1 << REISERFS_BARRIER_NONE
},
876 * possible values for "-o block-allocator=" and bits which are to be set in
877 * s_mount_opt of reiserfs specific part of in-core super block
879 static const arg_desc_t balloc
[] = {
880 {"noborder", 1 << REISERFS_NO_BORDER
, 0},
881 {"border", 0, 1 << REISERFS_NO_BORDER
},
882 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION
, 0},
883 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION
, 0},
884 {"test4", 1 << REISERFS_TEST4
, 0},
885 {"notest4", 0, 1 << REISERFS_TEST4
},
889 static const arg_desc_t tails
[] = {
890 {"on", 1 << REISERFS_LARGETAIL
, 1 << REISERFS_SMALLTAIL
},
891 {"off", 0, (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
892 {"small", 1 << REISERFS_SMALLTAIL
, 1 << REISERFS_LARGETAIL
},
896 static const arg_desc_t error_actions
[] = {
897 {"panic", 1 << REISERFS_ERROR_PANIC
,
898 (1 << REISERFS_ERROR_RO
| 1 << REISERFS_ERROR_CONTINUE
)},
899 {"ro-remount", 1 << REISERFS_ERROR_RO
,
900 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_CONTINUE
)},
901 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
902 {"continue", 1 << REISERFS_ERROR_CONTINUE
,
903 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_RO
)},
909 * proceed only one option from a list *cur - string containing of mount
911 * opts - array of options which are accepted
912 * opt_arg - if option is found and requires an argument and if it is specifed
913 * in the input - pointer to the argument is stored here
914 * bit_flags - if option requires to set a certain bit - it is set here
915 * return -1 if unknown option is found, opt->arg_required otherwise
917 static int reiserfs_getopt(struct super_block
*s
, char **cur
, opt_desc_t
* opts
,
918 char **opt_arg
, unsigned long *bit_flags
)
928 const opt_desc_t
*opt
;
929 const arg_desc_t
*arg
;
933 /* assume argument cannot contain commas */
934 *cur
= strchr(p
, ',');
940 if (!strncmp(p
, "alloc=", 6)) {
942 * Ugly special case, probably we should redo options
943 * parser so that it can understand several arguments for
944 * some options, also so that it can fill several bitfields
945 * with option values.
947 if (reiserfs_parse_alloc_options(s
, p
+ 6)) {
954 /* for every option in the list */
955 for (opt
= opts
; opt
->option_name
; opt
++) {
956 if (!strncmp(p
, opt
->option_name
, strlen(opt
->option_name
))) {
959 (1 << REISERFS_UNSUPPORTED_OPT
))
960 reiserfs_warning(s
, "super-6500",
961 "%s not supported.\n",
964 *bit_flags
&= ~opt
->clrmask
;
966 (1 << REISERFS_UNSUPPORTED_OPT
))
967 reiserfs_warning(s
, "super-6501",
968 "%s not supported.\n",
971 *bit_flags
|= opt
->setmask
;
976 if (!opt
->option_name
) {
977 reiserfs_warning(s
, "super-6502",
978 "unknown mount option \"%s\"", p
);
982 p
+= strlen(opt
->option_name
);
985 if (!opt
->arg_required
) {
986 reiserfs_warning(s
, "super-6503",
987 "the option \"%s\" does not "
988 "require an argument\n",
995 if (opt
->arg_required
) {
996 reiserfs_warning(s
, "super-6504",
997 "the option \"%s\" requires an "
998 "argument\n", opt
->option_name
);
1003 reiserfs_warning(s
, "super-6505",
1004 "head of option \"%s\" is only correct\n",
1010 * move to the argument, or to next option if argument is not
1015 if (opt
->arg_required
1016 && !(opt
->arg_required
& (1 << REISERFS_OPT_ALLOWEMPTY
))
1018 /* this catches "option=," if not allowed */
1019 reiserfs_warning(s
, "super-6506",
1020 "empty argument for \"%s\"\n",
1026 /* *=NULLopt_arg contains pointer to argument */
1028 return opt
->arg_required
& ~(1 << REISERFS_OPT_ALLOWEMPTY
);
1031 /* values possible for this option are listed in opt->values */
1032 for (arg
= opt
->values
; arg
->value
; arg
++) {
1033 if (!strcmp(p
, arg
->value
)) {
1035 *bit_flags
&= ~arg
->clrmask
;
1036 *bit_flags
|= arg
->setmask
;
1038 return opt
->arg_required
;
1042 reiserfs_warning(s
, "super-6506",
1043 "bad value \"%s\" for option \"%s\"\n", p
,
1048 /* returns 0 if something is wrong in option string, 1 - otherwise */
1049 static int reiserfs_parse_options(struct super_block
*s
,
1051 /* string given via mount's -o */
1055 * after the parsing phase, contains the
1056 * collection of bitflags defining what
1057 * mount options were selected.
1059 unsigned long *mount_options
,
1061 /* strtol-ed from NNN of resize=NNN */
1062 unsigned long *blocks
,
1064 unsigned int *commit_max_age
,
1071 opt_desc_t opts
[] = {
1073 * Compatibility stuff, so that -o notail for old
1076 {"tails",.arg_required
= 't',.values
= tails
},
1077 {"notail",.clrmask
=
1078 (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
1079 {"conv",.setmask
= 1 << REISERFS_CONVERT
},
1080 {"attrs",.setmask
= 1 << REISERFS_ATTRS
},
1081 {"noattrs",.clrmask
= 1 << REISERFS_ATTRS
},
1082 {"expose_privroot", .setmask
= 1 << REISERFS_EXPOSE_PRIVROOT
},
1083 #ifdef CONFIG_REISERFS_FS_XATTR
1084 {"user_xattr",.setmask
= 1 << REISERFS_XATTRS_USER
},
1085 {"nouser_xattr",.clrmask
= 1 << REISERFS_XATTRS_USER
},
1087 {"user_xattr",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1088 {"nouser_xattr",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1090 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1091 {"acl",.setmask
= 1 << REISERFS_POSIXACL
},
1092 {"noacl",.clrmask
= 1 << REISERFS_POSIXACL
},
1094 {"acl",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1095 {"noacl",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
1097 {.option_name
= "nolog"},
1098 {"replayonly",.setmask
= 1 << REPLAYONLY
},
1099 {"block-allocator",.arg_required
= 'a',.values
= balloc
},
1100 {"data",.arg_required
= 'd',.values
= logging_mode
},
1101 {"barrier",.arg_required
= 'b',.values
= barrier_mode
},
1102 {"resize",.arg_required
= 'r',.values
= NULL
},
1103 {"jdev",.arg_required
= 'j',.values
= NULL
},
1104 {"nolargeio",.arg_required
= 'w',.values
= NULL
},
1105 {"commit",.arg_required
= 'c',.values
= NULL
},
1106 {"usrquota",.setmask
= 1 << REISERFS_USRQUOTA
},
1107 {"grpquota",.setmask
= 1 << REISERFS_GRPQUOTA
},
1108 {"noquota",.clrmask
= 1 << REISERFS_USRQUOTA
| 1 << REISERFS_GRPQUOTA
},
1109 {"errors",.arg_required
= 'e',.values
= error_actions
},
1110 {"usrjquota",.arg_required
=
1111 'u' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1112 {"grpjquota",.arg_required
=
1113 'g' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
1114 {"jqfmt",.arg_required
= 'f',.values
= NULL
},
1115 {.option_name
= NULL
}
1119 if (!options
|| !*options
)
1121 * use default configuration: create tails, journaling on, no
1122 * conversion to newest format
1126 for (pos
= options
; pos
;) {
1127 c
= reiserfs_getopt(s
, &pos
, opts
, &arg
, mount_options
);
1129 /* wrong option is given */
1136 /* "resize=NNN" or "resize=auto" */
1138 if (!strcmp(arg
, "auto")) {
1139 /* From JFS code, to auto-get the size. */
1141 s
->s_bdev
->bd_inode
->i_size
>> s
->
1144 *blocks
= simple_strtoul(arg
, &p
, 0);
1146 /* NNN does not look like a number */
1147 reiserfs_warning(s
, "super-6507",
1157 unsigned long val
= simple_strtoul(arg
, &p
, 0);
1158 /* commit=NNN (time in seconds) */
1159 if (*p
!= '\0' || val
>= (unsigned int)-1) {
1160 reiserfs_warning(s
, "super-6508",
1161 "bad value %s for -ocommit\n",
1165 *commit_max_age
= (unsigned int)val
;
1169 reiserfs_warning(s
, "super-6509", "nolargeio option "
1170 "is no longer supported");
1175 if (arg
&& *arg
&& jdev_name
) {
1176 /* Hm, already assigned? */
1178 reiserfs_warning(s
, "super-6510",
1179 "journal device was "
1180 "already specified to "
1181 "be %s", *jdev_name
);
1188 if (c
== 'u' || c
== 'g') {
1189 int qtype
= c
== 'u' ? USRQUOTA
: GRPQUOTA
;
1191 if (sb_any_quota_loaded(s
) &&
1192 (!*arg
!= !REISERFS_SB(s
)->s_qf_names
[qtype
])) {
1193 reiserfs_warning(s
, "super-6511",
1194 "cannot change journaled "
1195 "quota options when quota "
1199 if (*arg
) { /* Some filename specified? */
1200 if (REISERFS_SB(s
)->s_qf_names
[qtype
]
1201 && strcmp(REISERFS_SB(s
)->s_qf_names
[qtype
],
1203 reiserfs_warning(s
, "super-6512",
1205 "already specified.",
1209 if (strchr(arg
, '/')) {
1210 reiserfs_warning(s
, "super-6513",
1211 "quotafile must be "
1212 "on filesystem root.");
1215 qf_names
[qtype
] = kstrdup(arg
, GFP_KERNEL
);
1216 if (!qf_names
[qtype
]) {
1217 reiserfs_warning(s
, "reiserfs-2502",
1218 "not enough memory "
1223 if (qtype
== USRQUOTA
)
1224 *mount_options
|= 1 << REISERFS_USRQUOTA
;
1226 *mount_options
|= 1 << REISERFS_GRPQUOTA
;
1228 if (qf_names
[qtype
] !=
1229 REISERFS_SB(s
)->s_qf_names
[qtype
])
1230 kfree(qf_names
[qtype
]);
1231 qf_names
[qtype
] = NULL
;
1232 if (qtype
== USRQUOTA
)
1233 *mount_options
&= ~(1 << REISERFS_USRQUOTA
);
1235 *mount_options
&= ~(1 << REISERFS_GRPQUOTA
);
1239 if (!strcmp(arg
, "vfsold"))
1240 *qfmt
= QFMT_VFS_OLD
;
1241 else if (!strcmp(arg
, "vfsv0"))
1242 *qfmt
= QFMT_VFS_V0
;
1244 reiserfs_warning(s
, "super-6514",
1245 "unknown quota format "
1249 if (sb_any_quota_loaded(s
) &&
1250 *qfmt
!= REISERFS_SB(s
)->s_jquota_fmt
) {
1251 reiserfs_warning(s
, "super-6515",
1252 "cannot change journaled "
1253 "quota options when quota "
1259 if (c
== 'u' || c
== 'g' || c
== 'f') {
1260 reiserfs_warning(s
, "reiserfs-2503", "journaled "
1261 "quota options not supported.");
1268 if (!REISERFS_SB(s
)->s_jquota_fmt
&& !*qfmt
1269 && (qf_names
[USRQUOTA
] || qf_names
[GRPQUOTA
])) {
1270 reiserfs_warning(s
, "super-6515",
1271 "journaled quota format not specified.");
1274 if ((!(*mount_options
& (1 << REISERFS_USRQUOTA
)) &&
1275 sb_has_quota_loaded(s
, USRQUOTA
)) ||
1276 (!(*mount_options
& (1 << REISERFS_GRPQUOTA
)) &&
1277 sb_has_quota_loaded(s
, GRPQUOTA
))) {
1278 reiserfs_warning(s
, "super-6516", "quota options must "
1279 "be present when quota is turned on.");
1287 static void switch_data_mode(struct super_block
*s
, unsigned long mode
)
1289 REISERFS_SB(s
)->s_mount_opt
&= ~((1 << REISERFS_DATA_LOG
) |
1290 (1 << REISERFS_DATA_ORDERED
) |
1291 (1 << REISERFS_DATA_WRITEBACK
));
1292 REISERFS_SB(s
)->s_mount_opt
|= (1 << mode
);
1295 static void handle_data_mode(struct super_block
*s
, unsigned long mount_options
)
1297 if (mount_options
& (1 << REISERFS_DATA_LOG
)) {
1298 if (!reiserfs_data_log(s
)) {
1299 switch_data_mode(s
, REISERFS_DATA_LOG
);
1300 reiserfs_info(s
, "switching to journaled data mode\n");
1302 } else if (mount_options
& (1 << REISERFS_DATA_ORDERED
)) {
1303 if (!reiserfs_data_ordered(s
)) {
1304 switch_data_mode(s
, REISERFS_DATA_ORDERED
);
1305 reiserfs_info(s
, "switching to ordered data mode\n");
1307 } else if (mount_options
& (1 << REISERFS_DATA_WRITEBACK
)) {
1308 if (!reiserfs_data_writeback(s
)) {
1309 switch_data_mode(s
, REISERFS_DATA_WRITEBACK
);
1310 reiserfs_info(s
, "switching to writeback data mode\n");
1315 static void handle_barrier_mode(struct super_block
*s
, unsigned long bits
)
1317 int flush
= (1 << REISERFS_BARRIER_FLUSH
);
1318 int none
= (1 << REISERFS_BARRIER_NONE
);
1319 int all_barrier
= flush
| none
;
1321 if (bits
& all_barrier
) {
1322 REISERFS_SB(s
)->s_mount_opt
&= ~all_barrier
;
1324 REISERFS_SB(s
)->s_mount_opt
|= flush
;
1325 printk("reiserfs: enabling write barrier flush mode\n");
1326 } else if (bits
& none
) {
1327 REISERFS_SB(s
)->s_mount_opt
|= none
;
1328 printk("reiserfs: write barriers turned off\n");
1333 static void handle_attrs(struct super_block
*s
)
1335 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(s
);
1337 if (reiserfs_attrs(s
)) {
1338 if (old_format_only(s
)) {
1339 reiserfs_warning(s
, "super-6517", "cannot support "
1340 "attributes on 3.5.x disk format");
1341 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1344 if (!(le32_to_cpu(rs
->s_flags
) & reiserfs_attrs_cleared
)) {
1345 reiserfs_warning(s
, "super-6518", "cannot support "
1346 "attributes until flag is set in "
1348 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1354 static void handle_quota_files(struct super_block
*s
, char **qf_names
,
1359 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1360 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1361 kfree(REISERFS_SB(s
)->s_qf_names
[i
]);
1362 REISERFS_SB(s
)->s_qf_names
[i
] = qf_names
[i
];
1365 REISERFS_SB(s
)->s_jquota_fmt
= *qfmt
;
1369 static int reiserfs_remount(struct super_block
*s
, int *mount_flags
, char *arg
)
1371 struct reiserfs_super_block
*rs
;
1372 struct reiserfs_transaction_handle th
;
1373 unsigned long blocks
;
1374 unsigned long mount_options
= REISERFS_SB(s
)->s_mount_opt
;
1375 unsigned long safe_mask
= 0;
1376 unsigned int commit_max_age
= (unsigned int)-1;
1377 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1378 char *new_opts
= kstrdup(arg
, GFP_KERNEL
);
1380 char *qf_names
[MAXQUOTAS
];
1381 unsigned int qfmt
= 0;
1387 reiserfs_write_lock(s
);
1390 memcpy(qf_names
, REISERFS_SB(s
)->s_qf_names
, sizeof(qf_names
));
1393 rs
= SB_DISK_SUPER_BLOCK(s
);
1395 if (!reiserfs_parse_options
1396 (s
, arg
, &mount_options
, &blocks
, NULL
, &commit_max_age
,
1399 for (i
= 0; i
< MAXQUOTAS
; i
++)
1400 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1404 goto out_err_unlock
;
1407 handle_quota_files(s
, qf_names
, &qfmt
);
1412 /* Add options that are safe here */
1413 safe_mask
|= 1 << REISERFS_SMALLTAIL
;
1414 safe_mask
|= 1 << REISERFS_LARGETAIL
;
1415 safe_mask
|= 1 << REISERFS_NO_BORDER
;
1416 safe_mask
|= 1 << REISERFS_NO_UNHASHED_RELOCATION
;
1417 safe_mask
|= 1 << REISERFS_HASHED_RELOCATION
;
1418 safe_mask
|= 1 << REISERFS_TEST4
;
1419 safe_mask
|= 1 << REISERFS_ATTRS
;
1420 safe_mask
|= 1 << REISERFS_XATTRS_USER
;
1421 safe_mask
|= 1 << REISERFS_POSIXACL
;
1422 safe_mask
|= 1 << REISERFS_BARRIER_FLUSH
;
1423 safe_mask
|= 1 << REISERFS_BARRIER_NONE
;
1424 safe_mask
|= 1 << REISERFS_ERROR_RO
;
1425 safe_mask
|= 1 << REISERFS_ERROR_CONTINUE
;
1426 safe_mask
|= 1 << REISERFS_ERROR_PANIC
;
1427 safe_mask
|= 1 << REISERFS_USRQUOTA
;
1428 safe_mask
|= 1 << REISERFS_GRPQUOTA
;
1431 * Update the bitmask, taking care to keep
1432 * the bits we're not allowed to change here
1434 REISERFS_SB(s
)->s_mount_opt
=
1436 s_mount_opt
& ~safe_mask
) | (mount_options
& safe_mask
);
1438 if (commit_max_age
!= 0 && commit_max_age
!= (unsigned int)-1) {
1439 journal
->j_max_commit_age
= commit_max_age
;
1440 journal
->j_max_trans_age
= commit_max_age
;
1441 } else if (commit_max_age
== 0) {
1442 /* 0 means restore defaults. */
1443 journal
->j_max_commit_age
= journal
->j_default_max_commit_age
;
1444 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
1448 err
= reiserfs_resize(s
, blocks
);
1450 goto out_err_unlock
;
1453 if (*mount_flags
& MS_RDONLY
) {
1454 reiserfs_write_unlock(s
);
1455 reiserfs_xattr_init(s
, *mount_flags
);
1456 /* remount read-only */
1457 if (s
->s_flags
& MS_RDONLY
)
1458 /* it is read-only already */
1459 goto out_ok_unlocked
;
1461 err
= dquot_suspend(s
, -1);
1465 /* try to remount file system with read-only permissions */
1466 if (sb_umount_state(rs
) == REISERFS_VALID_FS
1467 || REISERFS_SB(s
)->s_mount_state
!= REISERFS_VALID_FS
) {
1468 goto out_ok_unlocked
;
1471 reiserfs_write_lock(s
);
1473 err
= journal_begin(&th
, s
, 10);
1475 goto out_err_unlock
;
1477 /* Mounting a rw partition read-only. */
1478 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1479 set_sb_umount_state(rs
, REISERFS_SB(s
)->s_mount_state
);
1480 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1482 /* remount read-write */
1483 if (!(s
->s_flags
& MS_RDONLY
)) {
1484 reiserfs_write_unlock(s
);
1485 reiserfs_xattr_init(s
, *mount_flags
);
1486 goto out_ok_unlocked
; /* We are read-write already */
1489 if (reiserfs_is_journal_aborted(journal
)) {
1490 err
= journal
->j_errno
;
1491 goto out_err_unlock
;
1494 handle_data_mode(s
, mount_options
);
1495 handle_barrier_mode(s
, mount_options
);
1496 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1498 /* now it is safe to call journal_begin */
1499 s
->s_flags
&= ~MS_RDONLY
;
1500 err
= journal_begin(&th
, s
, 10);
1502 goto out_err_unlock
;
1504 /* Mount a partition which is read-only, read-write */
1505 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1506 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1507 s
->s_flags
&= ~MS_RDONLY
;
1508 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
1509 if (!old_format_only(s
))
1510 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
1511 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1512 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
1513 REISERFS_SB(s
)->s_mount_state
= REISERFS_VALID_FS
;
1515 /* this will force a full flush of all journal lists */
1516 SB_JOURNAL(s
)->j_must_wait
= 1;
1517 err
= journal_end(&th
);
1519 goto out_err_unlock
;
1521 reiserfs_write_unlock(s
);
1522 if (!(*mount_flags
& MS_RDONLY
)) {
1523 dquot_resume(s
, -1);
1524 reiserfs_write_lock(s
);
1525 finish_unfinished(s
);
1526 reiserfs_write_unlock(s
);
1527 reiserfs_xattr_init(s
, *mount_flags
);
1531 replace_mount_options(s
, new_opts
);
1535 reiserfs_write_unlock(s
);
1541 static int read_super_block(struct super_block
*s
, int offset
)
1543 struct buffer_head
*bh
;
1544 struct reiserfs_super_block
*rs
;
1547 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1549 reiserfs_warning(s
, "sh-2006",
1550 "bread failed (dev %s, block %lu, size %lu)",
1551 s
->s_id
, offset
/ s
->s_blocksize
,
1556 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1557 if (!is_any_reiserfs_magic_string(rs
)) {
1562 * ok, reiserfs signature (old or new) found in at the given offset
1564 fs_blocksize
= sb_blocksize(rs
);
1566 sb_set_blocksize(s
, fs_blocksize
);
1568 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1570 reiserfs_warning(s
, "sh-2007",
1571 "bread failed (dev %s, block %lu, size %lu)",
1572 s
->s_id
, offset
/ s
->s_blocksize
,
1577 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1578 if (sb_blocksize(rs
) != s
->s_blocksize
) {
1579 reiserfs_warning(s
, "sh-2011", "can't find a reiserfs "
1580 "filesystem on (dev %s, block %Lu, size %lu)",
1582 (unsigned long long)bh
->b_blocknr
,
1588 if (rs
->s_v1
.s_root_block
== cpu_to_le32(-1)) {
1590 reiserfs_warning(s
, "super-6519", "Unfinished reiserfsck "
1591 "--rebuild-tree run detected. Please run\n"
1592 "reiserfsck --rebuild-tree and wait for a "
1593 "completion. If that fails\n"
1594 "get newer reiserfsprogs package");
1598 SB_BUFFER_WITH_SB(s
) = bh
;
1599 SB_DISK_SUPER_BLOCK(s
) = rs
;
1602 * magic is of non-standard journal filesystem, look at s_version to
1603 * find which format is in use
1605 if (is_reiserfs_jr(rs
)) {
1606 if (sb_version(rs
) == REISERFS_VERSION_2
)
1607 reiserfs_info(s
, "found reiserfs format \"3.6\""
1608 " with non-standard journal\n");
1609 else if (sb_version(rs
) == REISERFS_VERSION_1
)
1610 reiserfs_info(s
, "found reiserfs format \"3.5\""
1611 " with non-standard journal\n");
1613 reiserfs_warning(s
, "sh-2012", "found unknown "
1614 "format \"%u\" of reiserfs with "
1615 "non-standard magic", sb_version(rs
));
1620 * s_version of standard format may contain incorrect
1621 * information, so we just look at the magic string
1624 "found reiserfs format \"%s\" with standard journal\n",
1625 is_reiserfs_3_5(rs
) ? "3.5" : "3.6");
1627 s
->s_op
= &reiserfs_sops
;
1628 s
->s_export_op
= &reiserfs_export_ops
;
1630 s
->s_qcop
= &reiserfs_qctl_operations
;
1631 s
->dq_op
= &reiserfs_quota_operations
;
1635 * new format is limited by the 32 bit wide i_blocks field, want to
1636 * be one full block below that.
1638 s
->s_maxbytes
= (512LL << 32) - s
->s_blocksize
;
1642 /* after journal replay, reread all bitmap and super blocks */
1643 static int reread_meta_blocks(struct super_block
*s
)
1645 ll_rw_block(READ
, 1, &SB_BUFFER_WITH_SB(s
));
1646 wait_on_buffer(SB_BUFFER_WITH_SB(s
));
1647 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s
))) {
1648 reiserfs_warning(s
, "reiserfs-2504", "error reading the super");
1655 /* hash detection stuff */
1658 * if root directory is empty - we set default - Yura's - hash and
1660 * FIXME: we look for only one name in a directory. If tea and yura
1661 * both have the same value - we ask user to send report to the
1664 static __u32
find_hash_out(struct super_block
*s
)
1667 struct inode
*inode
;
1669 INITIALIZE_PATH(path
);
1670 struct reiserfs_dir_entry de
;
1671 struct reiserfs_de_head
*deh
;
1672 __u32 hash
= DEFAULT_HASH
;
1673 __u32 deh_hashval
, teahash
, r5hash
, yurahash
;
1675 inode
= s
->s_root
->d_inode
;
1677 make_cpu_key(&key
, inode
, ~0, TYPE_DIRENTRY
, 3);
1678 retval
= search_by_entry_key(s
, &key
, &path
, &de
);
1679 if (retval
== IO_ERROR
) {
1683 if (retval
== NAME_NOT_FOUND
)
1686 set_de_name_and_namelen(&de
);
1687 deh
= de
.de_deh
+ de
.de_entry_num
;
1689 if (deh_offset(deh
) == DOT_DOT_OFFSET
) {
1690 /* allow override in this case */
1691 if (reiserfs_rupasov_hash(s
))
1693 reiserfs_info(s
, "FS seems to be empty, autodetect is using the default hash\n");
1697 deh_hashval
= GET_HASH_VALUE(deh_offset(deh
));
1698 r5hash
= GET_HASH_VALUE(r5_hash(de
.de_name
, de
.de_namelen
));
1699 teahash
= GET_HASH_VALUE(keyed_hash(de
.de_name
, de
.de_namelen
));
1700 yurahash
= GET_HASH_VALUE(yura_hash(de
.de_name
, de
.de_namelen
));
1702 if ((teahash
== r5hash
&& deh_hashval
== r5hash
) ||
1703 (teahash
== yurahash
&& deh_hashval
== yurahash
) ||
1704 (r5hash
== yurahash
&& deh_hashval
== yurahash
)) {
1705 reiserfs_warning(s
, "reiserfs-2506",
1706 "Unable to automatically detect hash "
1707 "function. Please mount with -o "
1708 "hash={tea,rupasov,r5}");
1713 if (deh_hashval
== yurahash
)
1715 else if (deh_hashval
== teahash
)
1717 else if (deh_hashval
== r5hash
)
1720 reiserfs_warning(s
, "reiserfs-2506",
1721 "Unrecognised hash function");
1729 /* finds out which hash names are sorted with */
1730 static int what_hash(struct super_block
*s
)
1734 code
= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
));
1737 * reiserfs_hash_detect() == true if any of the hash mount options
1738 * were used. We must check them to make sure the user isn't
1739 * using a bad hash value
1741 if (code
== UNSET_HASH
|| reiserfs_hash_detect(s
))
1742 code
= find_hash_out(s
);
1744 if (code
!= UNSET_HASH
&& reiserfs_hash_detect(s
)) {
1746 * detection has found the hash, and we must check against the
1749 if (reiserfs_rupasov_hash(s
) && code
!= YURA_HASH
) {
1750 reiserfs_warning(s
, "reiserfs-2507",
1751 "Error, %s hash detected, "
1752 "unable to force rupasov hash",
1753 reiserfs_hashname(code
));
1755 } else if (reiserfs_tea_hash(s
) && code
!= TEA_HASH
) {
1756 reiserfs_warning(s
, "reiserfs-2508",
1757 "Error, %s hash detected, "
1758 "unable to force tea hash",
1759 reiserfs_hashname(code
));
1761 } else if (reiserfs_r5_hash(s
) && code
!= R5_HASH
) {
1762 reiserfs_warning(s
, "reiserfs-2509",
1763 "Error, %s hash detected, "
1764 "unable to force r5 hash",
1765 reiserfs_hashname(code
));
1770 * find_hash_out was not called or
1771 * could not determine the hash
1773 if (reiserfs_rupasov_hash(s
)) {
1775 } else if (reiserfs_tea_hash(s
)) {
1777 } else if (reiserfs_r5_hash(s
)) {
1783 * if we are mounted RW, and we have a new valid hash code, update
1786 if (code
!= UNSET_HASH
&&
1787 !(s
->s_flags
& MS_RDONLY
) &&
1788 code
!= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
))) {
1789 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
), code
);
1794 /* return pointer to appropriate function */
1795 static hashf_t
hash_function(struct super_block
*s
)
1797 switch (what_hash(s
)) {
1799 reiserfs_info(s
, "Using tea hash to sort names\n");
1802 reiserfs_info(s
, "Using rupasov hash to sort names\n");
1805 reiserfs_info(s
, "Using r5 hash to sort names\n");
1811 /* this is used to set up correct value for old partitions */
1812 static int function2code(hashf_t func
)
1814 if (func
== keyed_hash
)
1816 if (func
== yura_hash
)
1818 if (func
== r5_hash
)
1821 BUG(); /* should never happen */
1826 #define SWARN(silent, s, id, ...) \
1828 reiserfs_warning(s, id, __VA_ARGS__)
1830 static int reiserfs_fill_super(struct super_block
*s
, void *data
, int silent
)
1832 struct inode
*root_inode
;
1833 struct reiserfs_transaction_handle th
;
1835 unsigned long blocks
;
1836 unsigned int commit_max_age
= 0;
1838 struct reiserfs_iget_args args
;
1839 struct reiserfs_super_block
*rs
;
1841 struct reiserfs_sb_info
*sbi
;
1842 int errval
= -EINVAL
;
1843 char *qf_names
[MAXQUOTAS
] = {};
1844 unsigned int qfmt
= 0;
1846 save_mount_options(s
, data
);
1848 sbi
= kzalloc(sizeof(struct reiserfs_sb_info
), GFP_KERNEL
);
1852 /* Set default values for options: non-aggressive tails, RO on errors */
1853 sbi
->s_mount_opt
|= (1 << REISERFS_SMALLTAIL
);
1854 sbi
->s_mount_opt
|= (1 << REISERFS_ERROR_RO
);
1855 sbi
->s_mount_opt
|= (1 << REISERFS_BARRIER_FLUSH
);
1856 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1857 sbi
->s_alloc_options
.preallocmin
= 0;
1858 /* Preallocate by 16 blocks (17-1) at once */
1859 sbi
->s_alloc_options
.preallocsize
= 17;
1860 /* setup default block allocator options */
1861 reiserfs_init_alloc_options(s
);
1863 spin_lock_init(&sbi
->old_work_lock
);
1864 INIT_DELAYED_WORK(&sbi
->old_work
, flush_old_commits
);
1865 mutex_init(&sbi
->lock
);
1866 sbi
->lock_depth
= -1;
1868 sbi
->commit_wq
= alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM
, 0,
1870 if (!sbi
->commit_wq
) {
1871 SWARN(silent
, s
, "", "Cannot allocate commit workqueue");
1873 goto error_unlocked
;
1877 if (reiserfs_parse_options
1878 (s
, (char *)data
, &sbi
->s_mount_opt
, &blocks
, &jdev_name
,
1879 &commit_max_age
, qf_names
, &qfmt
) == 0) {
1880 goto error_unlocked
;
1882 if (jdev_name
&& jdev_name
[0]) {
1883 sbi
->s_jdev
= kstrdup(jdev_name
, GFP_KERNEL
);
1885 SWARN(silent
, s
, "", "Cannot allocate memory for "
1886 "journal device name");
1891 handle_quota_files(s
, qf_names
, &qfmt
);
1895 SWARN(silent
, s
, "jmacd-7", "resize option for remount only");
1896 goto error_unlocked
;
1900 * try old format (undistributed bitmap, super block in 8-th 1k
1901 * block of a device)
1903 if (!read_super_block(s
, REISERFS_OLD_DISK_OFFSET_IN_BYTES
))
1907 * try new format (64-th 1k block), which can contain reiserfs
1910 else if (read_super_block(s
, REISERFS_DISK_OFFSET_IN_BYTES
)) {
1911 SWARN(silent
, s
, "sh-2021", "can not find reiserfs on %s",
1913 goto error_unlocked
;
1916 rs
= SB_DISK_SUPER_BLOCK(s
);
1918 * Let's do basic sanity check to verify that underlying device is not
1919 * smaller than the filesystem. If the check fails then abort and
1920 * scream, because bad stuff will happen otherwise.
1922 if (s
->s_bdev
&& s
->s_bdev
->bd_inode
1923 && i_size_read(s
->s_bdev
->bd_inode
) <
1924 sb_block_count(rs
) * sb_blocksize(rs
)) {
1925 SWARN(silent
, s
, "", "Filesystem cannot be "
1926 "mounted because it is bigger than the device");
1927 SWARN(silent
, s
, "", "You may need to run fsck "
1928 "or increase size of your LVM partition");
1929 SWARN(silent
, s
, "", "Or may be you forgot to "
1930 "reboot after fdisk when it told you to");
1931 goto error_unlocked
;
1934 sbi
->s_mount_state
= SB_REISERFS_STATE(s
);
1935 sbi
->s_mount_state
= REISERFS_VALID_FS
;
1937 if ((errval
= reiserfs_init_bitmap_cache(s
))) {
1938 SWARN(silent
, s
, "jmacd-8", "unable to read bitmap");
1939 goto error_unlocked
;
1943 #ifdef CONFIG_REISERFS_CHECK
1944 SWARN(silent
, s
, "", "CONFIG_REISERFS_CHECK is set ON");
1945 SWARN(silent
, s
, "", "- it is slow mode for debugging.");
1948 /* make data=ordered the default */
1949 if (!reiserfs_data_log(s
) && !reiserfs_data_ordered(s
) &&
1950 !reiserfs_data_writeback(s
)) {
1951 sbi
->s_mount_opt
|= (1 << REISERFS_DATA_ORDERED
);
1954 if (reiserfs_data_log(s
)) {
1955 reiserfs_info(s
, "using journaled data mode\n");
1956 } else if (reiserfs_data_ordered(s
)) {
1957 reiserfs_info(s
, "using ordered data mode\n");
1959 reiserfs_info(s
, "using writeback data mode\n");
1961 if (reiserfs_barrier_flush(s
)) {
1962 printk("reiserfs: using flush barriers\n");
1965 if (journal_init(s
, jdev_name
, old_format
, commit_max_age
)) {
1966 SWARN(silent
, s
, "sh-2022",
1967 "unable to initialize journal space");
1968 goto error_unlocked
;
1971 * once this is set, journal_release must be called
1972 * if we error out of the mount
1977 if (reread_meta_blocks(s
)) {
1978 SWARN(silent
, s
, "jmacd-9",
1979 "unable to reread meta blocks after journal init");
1980 goto error_unlocked
;
1984 goto error_unlocked
;
1986 if (bdev_read_only(s
->s_bdev
) && !(s
->s_flags
& MS_RDONLY
)) {
1987 SWARN(silent
, s
, "clm-7000",
1988 "Detected readonly device, marking FS readonly");
1989 s
->s_flags
|= MS_RDONLY
;
1991 args
.objectid
= REISERFS_ROOT_OBJECTID
;
1992 args
.dirid
= REISERFS_ROOT_PARENT_OBJECTID
;
1994 iget5_locked(s
, REISERFS_ROOT_OBJECTID
, reiserfs_find_actor
,
1995 reiserfs_init_locked_inode
, (void *)&args
);
1997 SWARN(silent
, s
, "jmacd-10", "get root inode failed");
1998 goto error_unlocked
;
2002 * This path assumed to be called with the BKL in the old times.
2003 * Now we have inherited the big reiserfs lock from it and many
2004 * reiserfs helpers called in the mount path and elsewhere require
2005 * this lock to be held even if it's not always necessary. Let's be
2006 * conservative and hold it early. The window can be reduced after
2007 * careful review of the code.
2009 reiserfs_write_lock(s
);
2011 if (root_inode
->i_state
& I_NEW
) {
2012 reiserfs_read_locked_inode(root_inode
, &args
);
2013 unlock_new_inode(root_inode
);
2016 s
->s_root
= d_make_root(root_inode
);
2019 /* define and initialize hash function */
2020 sbi
->s_hash_function
= hash_function(s
);
2021 if (sbi
->s_hash_function
== NULL
) {
2027 if (is_reiserfs_3_5(rs
)
2028 || (is_reiserfs_jr(rs
) && SB_VERSION(s
) == REISERFS_VERSION_1
))
2029 set_bit(REISERFS_3_5
, &sbi
->s_properties
);
2030 else if (old_format
)
2031 set_bit(REISERFS_OLD_FORMAT
, &sbi
->s_properties
);
2033 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2035 if (!(s
->s_flags
& MS_RDONLY
)) {
2037 errval
= journal_begin(&th
, s
, 1);
2043 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
2045 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
2046 set_sb_fs_state(rs
, 0);
2049 * Clear out s_bmap_nr if it would wrap. We can handle this
2050 * case, but older revisions can't. This will cause the
2051 * file system to fail mount on those older implementations,
2052 * avoiding corruption. -jeffm
2054 if (bmap_would_wrap(reiserfs_bmap_count(s
)) &&
2055 sb_bmap_nr(rs
) != 0) {
2056 reiserfs_warning(s
, "super-2030", "This file system "
2057 "claims to use %u bitmap blocks in "
2058 "its super block, but requires %u. "
2059 "Clearing to zero.", sb_bmap_nr(rs
),
2060 reiserfs_bmap_count(s
));
2062 set_sb_bmap_nr(rs
, 0);
2065 if (old_format_only(s
)) {
2067 * filesystem of format 3.5 either with standard
2068 * or non-standard journal
2070 if (convert_reiserfs(s
)) {
2071 /* and -o conv is given */
2074 "converting 3.5 filesystem to the 3.6 format");
2076 if (is_reiserfs_3_5(rs
))
2078 * put magic string of 3.6 format.
2079 * 2.2 will not be able to
2080 * mount this filesystem anymore
2082 memcpy(rs
->s_v1
.s_magic
,
2083 reiserfs_3_6_magic_string
,
2085 (reiserfs_3_6_magic_string
));
2087 set_sb_version(rs
, REISERFS_VERSION_2
);
2088 reiserfs_convert_objectid_map_v1(s
);
2089 set_bit(REISERFS_3_6
, &sbi
->s_properties
);
2090 clear_bit(REISERFS_3_5
, &sbi
->s_properties
);
2091 } else if (!silent
) {
2092 reiserfs_info(s
, "using 3.5.x disk format\n");
2095 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
2098 journal_mark_dirty(&th
, SB_BUFFER_WITH_SB(s
));
2099 errval
= journal_end(&th
);
2106 reiserfs_write_unlock(s
);
2107 if ((errval
= reiserfs_lookup_privroot(s
)) ||
2108 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
2111 goto error_unlocked
;
2113 reiserfs_write_lock(s
);
2116 * look for files which were to be removed in previous session
2118 finish_unfinished(s
);
2120 if (old_format_only(s
) && !silent
) {
2121 reiserfs_info(s
, "using 3.5.x disk format\n");
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 * mark hash in super block: it could be unset. overwrite should be ok
2136 set_sb_hash_function_code(rs
, function2code(sbi
->s_hash_function
));
2140 reiserfs_proc_info_init(s
);
2142 init_waitqueue_head(&(sbi
->s_wait
));
2143 spin_lock_init(&sbi
->bitmap_lock
);
2145 reiserfs_write_unlock(s
);
2150 reiserfs_write_unlock(s
);
2153 /* kill the commit thread, free journal ram */
2155 reiserfs_write_lock(s
);
2156 journal_release_error(NULL
, s
);
2157 reiserfs_write_unlock(s
);
2160 cancel_delayed_work_sync(&REISERFS_SB(s
)->old_work
);
2162 reiserfs_free_bitmap_cache(s
);
2163 if (SB_BUFFER_WITH_SB(s
))
2164 brelse(SB_BUFFER_WITH_SB(s
));
2168 for (j
= 0; j
< MAXQUOTAS
; j
++)
2174 s
->s_fs_info
= NULL
;
2178 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
2180 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(dentry
->d_sb
);
2182 buf
->f_namelen
= (REISERFS_MAX_NAME(s
->s_blocksize
));
2183 buf
->f_bfree
= sb_free_blocks(rs
);
2184 buf
->f_bavail
= buf
->f_bfree
;
2185 buf
->f_blocks
= sb_block_count(rs
) - sb_bmap_nr(rs
) - 1;
2186 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
2187 /* changed to accommodate gcc folks. */
2188 buf
->f_type
= REISERFS_SUPER_MAGIC
;
2189 buf
->f_fsid
.val
[0] = (u32
)crc32_le(0, rs
->s_uuid
, sizeof(rs
->s_uuid
)/2);
2190 buf
->f_fsid
.val
[1] = (u32
)crc32_le(0, rs
->s_uuid
+ sizeof(rs
->s_uuid
)/2,
2191 sizeof(rs
->s_uuid
)/2);
2197 static int reiserfs_write_dquot(struct dquot
*dquot
)
2199 struct reiserfs_transaction_handle th
;
2203 reiserfs_write_lock(dquot
->dq_sb
);
2205 journal_begin(&th
, dquot
->dq_sb
,
2206 REISERFS_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2209 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2210 ret
= dquot_commit(dquot
);
2211 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2212 err
= journal_end(&th
);
2216 reiserfs_write_unlock(dquot
->dq_sb
);
2220 static int reiserfs_acquire_dquot(struct dquot
*dquot
)
2222 struct reiserfs_transaction_handle th
;
2226 reiserfs_write_lock(dquot
->dq_sb
);
2228 journal_begin(&th
, dquot
->dq_sb
,
2229 REISERFS_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2232 depth
= reiserfs_write_unlock_nested(dquot
->dq_sb
);
2233 ret
= dquot_acquire(dquot
);
2234 reiserfs_write_lock_nested(dquot
->dq_sb
, depth
);
2235 err
= journal_end(&th
);
2239 reiserfs_write_unlock(dquot
->dq_sb
);
2243 static int reiserfs_release_dquot(struct dquot
*dquot
)
2245 struct reiserfs_transaction_handle th
;
2248 reiserfs_write_lock(dquot
->dq_sb
);
2250 journal_begin(&th
, dquot
->dq_sb
,
2251 REISERFS_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2252 reiserfs_write_unlock(dquot
->dq_sb
);
2254 /* Release dquot anyway to avoid endless cycle in dqput() */
2255 dquot_release(dquot
);
2258 ret
= dquot_release(dquot
);
2259 reiserfs_write_lock(dquot
->dq_sb
);
2260 err
= journal_end(&th
);
2263 reiserfs_write_unlock(dquot
->dq_sb
);
2268 static int reiserfs_mark_dquot_dirty(struct dquot
*dquot
)
2270 /* Are we journaling quotas? */
2271 if (REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2272 REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2273 dquot_mark_dquot_dirty(dquot
);
2274 return reiserfs_write_dquot(dquot
);
2276 return dquot_mark_dquot_dirty(dquot
);
2279 static int reiserfs_write_info(struct super_block
*sb
, int type
)
2281 struct reiserfs_transaction_handle th
;
2285 /* Data block + inode block */
2286 reiserfs_write_lock(sb
);
2287 ret
= journal_begin(&th
, sb
, 2);
2290 depth
= reiserfs_write_unlock_nested(sb
);
2291 ret
= dquot_commit_info(sb
, type
);
2292 reiserfs_write_lock_nested(sb
, depth
);
2293 err
= journal_end(&th
);
2297 reiserfs_write_unlock(sb
);
2302 * Turn on quotas during mount time - we need to find the quota file and such...
2304 static int reiserfs_quota_on_mount(struct super_block
*sb
, int type
)
2306 return dquot_quota_on_mount(sb
, REISERFS_SB(sb
)->s_qf_names
[type
],
2307 REISERFS_SB(sb
)->s_jquota_fmt
, type
);
2311 * Standard function to be called on quota_on
2313 static int reiserfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
2317 struct inode
*inode
;
2318 struct reiserfs_transaction_handle th
;
2319 int opt
= type
== USRQUOTA
? REISERFS_USRQUOTA
: REISERFS_GRPQUOTA
;
2321 reiserfs_write_lock(sb
);
2322 if (!(REISERFS_SB(sb
)->s_mount_opt
& (1 << opt
))) {
2327 /* Quotafile not on the same filesystem? */
2328 if (path
->dentry
->d_sb
!= sb
) {
2332 inode
= path
->dentry
->d_inode
;
2334 * We must not pack tails for quota files on reiserfs for quota
2337 if (!(REISERFS_I(inode
)->i_flags
& i_nopack_mask
)) {
2338 err
= reiserfs_unpack(inode
, NULL
);
2340 reiserfs_warning(sb
, "super-6520",
2341 "Unpacking tail of quota file failed"
2342 " (%d). Cannot turn on quotas.", err
);
2346 mark_inode_dirty(inode
);
2348 /* Journaling quota? */
2349 if (REISERFS_SB(sb
)->s_qf_names
[type
]) {
2350 /* Quotafile not of fs root? */
2351 if (path
->dentry
->d_parent
!= sb
->s_root
)
2352 reiserfs_warning(sb
, "super-6521",
2353 "Quota file not on filesystem root. "
2354 "Journalled quota will not work.");
2358 * When we journal data on quota file, we have to flush journal to see
2359 * all updates to the file when we bypass pagecache...
2361 if (reiserfs_file_data_log(inode
)) {
2362 /* Just start temporary transaction and finish it */
2363 err
= journal_begin(&th
, sb
, 1);
2366 err
= journal_end_sync(&th
);
2370 reiserfs_write_unlock(sb
);
2371 return dquot_quota_on(sb
, type
, format_id
, path
);
2373 reiserfs_write_unlock(sb
);
2378 * Read data from quotafile - avoid pagecache and such because we cannot afford
2379 * acquiring the locks... As quota files are never truncated and quota code
2380 * itself serializes the operations (and no one else should touch the files)
2381 * we don't have to be afraid of races
2383 static ssize_t
reiserfs_quota_read(struct super_block
*sb
, int type
, char *data
,
2384 size_t len
, loff_t off
)
2386 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2387 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2388 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2390 struct buffer_head tmp_bh
, *bh
;
2391 loff_t i_size
= i_size_read(inode
);
2395 if (off
+ len
> i_size
)
2398 while (toread
> 0) {
2400 sb
->s_blocksize
- offset
<
2401 toread
? sb
->s_blocksize
- offset
: toread
;
2404 * Quota files are without tails so we can safely
2407 reiserfs_write_lock(sb
);
2408 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, 0);
2409 reiserfs_write_unlock(sb
);
2412 if (!buffer_mapped(&tmp_bh
)) /* A hole? */
2413 memset(data
, 0, tocopy
);
2415 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2418 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
2430 * Write to quotafile (we know the transaction is already started and has
2433 static ssize_t
reiserfs_quota_write(struct super_block
*sb
, int type
,
2434 const char *data
, size_t len
, loff_t off
)
2436 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2437 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2438 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2439 int journal_quota
= REISERFS_SB(sb
)->s_qf_names
[type
] != NULL
;
2440 size_t towrite
= len
;
2441 struct buffer_head tmp_bh
, *bh
;
2443 if (!current
->journal_info
) {
2444 printk(KERN_WARNING
"reiserfs: Quota write (off=%Lu, len=%Lu)"
2445 " cancelled because transaction is not started.\n",
2446 (unsigned long long)off
, (unsigned long long)len
);
2449 while (towrite
> 0) {
2450 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2451 sb
->s_blocksize
- offset
: towrite
;
2453 reiserfs_write_lock(sb
);
2454 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, GET_BLOCK_CREATE
);
2455 reiserfs_write_unlock(sb
);
2458 if (offset
|| tocopy
!= sb
->s_blocksize
)
2459 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2461 bh
= sb_getblk(sb
, tmp_bh
.b_blocknr
);
2467 memcpy(bh
->b_data
+ offset
, data
, tocopy
);
2468 flush_dcache_page(bh
->b_page
);
2469 set_buffer_uptodate(bh
);
2471 reiserfs_write_lock(sb
);
2472 reiserfs_prepare_for_journal(sb
, bh
, 1);
2473 journal_mark_dirty(current
->journal_info
, bh
);
2475 reiserfs_add_ordered_list(inode
, bh
);
2476 reiserfs_write_unlock(sb
);
2486 if (inode
->i_size
< off
+ len
- towrite
)
2487 i_size_write(inode
, off
+ len
- towrite
);
2489 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2490 mark_inode_dirty(inode
);
2491 return len
- towrite
;
2496 static struct dentry
*get_super_block(struct file_system_type
*fs_type
,
2497 int flags
, const char *dev_name
,
2500 return mount_bdev(fs_type
, flags
, dev_name
, data
, reiserfs_fill_super
);
2503 static int __init
init_reiserfs_fs(void)
2507 ret
= init_inodecache();
2511 reiserfs_proc_info_global_init();
2513 ret
= register_filesystem(&reiserfs_fs_type
);
2519 reiserfs_proc_info_global_done();
2520 destroy_inodecache();
2525 static void __exit
exit_reiserfs_fs(void)
2527 reiserfs_proc_info_global_done();
2528 unregister_filesystem(&reiserfs_fs_type
);
2529 destroy_inodecache();
2532 struct file_system_type reiserfs_fs_type
= {
2533 .owner
= THIS_MODULE
,
2535 .mount
= get_super_block
,
2536 .kill_sb
= reiserfs_kill_sb
,
2537 .fs_flags
= FS_REQUIRES_DEV
,
2539 MODULE_ALIAS_FS("reiserfs");
2541 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2542 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2543 MODULE_LICENSE("GPL");
2545 module_init(init_reiserfs_fs
);
2546 module_exit(exit_reiserfs_fs
);