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/vmalloc.h>
16 #include <linux/time.h>
17 #include <asm/uaccess.h>
18 #include <linux/reiserfs_fs.h>
19 #include <linux/reiserfs_acl.h>
20 #include <linux/reiserfs_xattr.h>
21 #include <linux/init.h>
22 #include <linux/blkdev.h>
23 #include <linux/buffer_head.h>
24 #include <linux/exportfs.h>
25 #include <linux/quotaops.h>
26 #include <linux/vfs.h>
27 #include <linux/mount.h>
28 #include <linux/namei.h>
29 #include <linux/crc32.h>
30 #include <linux/smp_lock.h>
32 struct file_system_type reiserfs_fs_type
;
34 static const char reiserfs_3_5_magic_string
[] = REISERFS_SUPER_MAGIC_STRING
;
35 static const char reiserfs_3_6_magic_string
[] = REISER2FS_SUPER_MAGIC_STRING
;
36 static const char reiserfs_jr_magic_string
[] = REISER2FS_JR_SUPER_MAGIC_STRING
;
38 int is_reiserfs_3_5(struct reiserfs_super_block
*rs
)
40 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_5_magic_string
,
41 strlen(reiserfs_3_5_magic_string
));
44 int is_reiserfs_3_6(struct reiserfs_super_block
*rs
)
46 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_3_6_magic_string
,
47 strlen(reiserfs_3_6_magic_string
));
50 int is_reiserfs_jr(struct reiserfs_super_block
*rs
)
52 return !strncmp(rs
->s_v1
.s_magic
, reiserfs_jr_magic_string
,
53 strlen(reiserfs_jr_magic_string
));
56 static int is_any_reiserfs_magic_string(struct reiserfs_super_block
*rs
)
58 return (is_reiserfs_3_5(rs
) || is_reiserfs_3_6(rs
) ||
62 static int reiserfs_remount(struct super_block
*s
, int *flags
, char *data
);
63 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
);
65 static int reiserfs_sync_fs(struct super_block
*s
, int wait
)
67 struct reiserfs_transaction_handle th
;
69 reiserfs_write_lock(s
);
70 if (!journal_begin(&th
, s
, 1))
71 if (!journal_end_sync(&th
, s
, 1))
72 reiserfs_flush_old_commits(s
);
73 s
->s_dirt
= 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s
);
79 static void reiserfs_write_super(struct super_block
*s
)
81 reiserfs_sync_fs(s
, 1);
84 static int reiserfs_freeze(struct super_block
*s
)
86 struct reiserfs_transaction_handle th
;
87 reiserfs_write_lock(s
);
88 if (!(s
->s_flags
& MS_RDONLY
)) {
89 int err
= journal_begin(&th
, s
, 1);
91 reiserfs_block_writes(&th
);
93 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
95 journal_mark_dirty(&th
, s
, SB_BUFFER_WITH_SB(s
));
96 reiserfs_block_writes(&th
);
97 journal_end_sync(&th
, s
, 1);
101 reiserfs_write_unlock(s
);
105 static int reiserfs_unfreeze(struct super_block
*s
)
107 reiserfs_allow_writes(s
);
111 extern const struct in_core_key MAX_IN_CORE_KEY
;
113 /* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
120 static int remove_save_link_only(struct super_block
*s
,
121 struct reiserfs_key
*key
, int oid_free
)
123 struct reiserfs_transaction_handle th
;
126 /* we are going to do one balancing */
127 err
= journal_begin(&th
, s
, JOURNAL_PER_BALANCE_CNT
);
131 reiserfs_delete_solid_item(&th
, NULL
, key
);
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th
, le32_to_cpu(key
->k_objectid
));
136 return journal_end(&th
, s
, JOURNAL_PER_BALANCE_CNT
);
140 static int reiserfs_quota_on_mount(struct super_block
*, int);
143 /* look for uncompleted unlinks and truncates and complete them */
144 static int finish_unfinished(struct super_block
*s
)
146 INITIALIZE_PATH(path
);
147 struct cpu_key max_cpu_key
, obj_key
;
148 struct reiserfs_key save_link_key
, last_inode_key
;
150 struct item_head
*ih
;
151 struct buffer_head
*bh
;
162 /* compose key to look for "save" links */
163 max_cpu_key
.version
= KEY_FORMAT_3_5
;
164 max_cpu_key
.on_disk_key
.k_dir_id
= ~0U;
165 max_cpu_key
.on_disk_key
.k_objectid
= ~0U;
166 set_cpu_key_k_offset(&max_cpu_key
, ~0U);
167 max_cpu_key
.key_length
= 3;
169 memset(&last_inode_key
, 0, sizeof(last_inode_key
));
172 /* Needed for iput() to work correctly and not trash data */
173 if (s
->s_flags
& MS_ACTIVE
) {
177 s
->s_flags
|= MS_ACTIVE
;
179 /* Turn on quotas so that they are updated correctly */
180 for (i
= 0; i
< MAXQUOTAS
; i
++) {
181 if (REISERFS_SB(s
)->s_qf_names
[i
]) {
182 int ret
= reiserfs_quota_on_mount(s
, i
);
184 reiserfs_warning(s
, "reiserfs-2500",
185 "cannot turn on journaled "
186 "quota: error %d", ret
);
192 REISERFS_SB(s
)->s_is_unlinked_ok
= 1;
194 retval
= search_item(s
, &max_cpu_key
, &path
);
195 if (retval
!= ITEM_NOT_FOUND
) {
196 reiserfs_error(s
, "vs-2140",
197 "search_by_key returned %d", retval
);
201 bh
= get_last_bh(&path
);
202 item_pos
= get_item_pos(&path
);
203 if (item_pos
!= B_NR_ITEMS(bh
)) {
204 reiserfs_warning(s
, "vs-2060",
205 "wrong position found");
209 ih
= B_N_PITEM_HEAD(bh
, item_pos
);
211 if (le32_to_cpu(ih
->ih_key
.k_dir_id
) != MAX_KEY_OBJECTID
)
212 /* there are no "save" links anymore */
215 save_link_key
= ih
->ih_key
;
216 if (is_indirect_le_ih(ih
))
221 /* reiserfs_iget needs k_dirid and k_objectid only */
222 item
= B_I_PITEM(bh
, ih
);
223 obj_key
.on_disk_key
.k_dir_id
= le32_to_cpu(*(__le32
*) item
);
224 obj_key
.on_disk_key
.k_objectid
=
225 le32_to_cpu(ih
->ih_key
.k_objectid
);
226 obj_key
.on_disk_key
.k_offset
= 0;
227 obj_key
.on_disk_key
.k_type
= 0;
231 inode
= reiserfs_iget(s
, &obj_key
);
233 /* the unlink almost completed, it just did not manage to remove
234 "save" link and release objectid */
235 reiserfs_warning(s
, "vs-2180", "iget failed for %K",
237 retval
= remove_save_link_only(s
, &save_link_key
, 1);
241 if (!truncate
&& inode
->i_nlink
) {
242 /* file is not unlinked */
243 reiserfs_warning(s
, "vs-2185",
244 "file %K is not unlinked",
246 retval
= remove_save_link_only(s
, &save_link_key
, 0);
251 if (truncate
&& S_ISDIR(inode
->i_mode
)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
256 reiserfs_warning(s
, "green-2101",
257 "impossible truncate on a "
258 "directory %k. Please report",
260 retval
= remove_save_link_only(s
, &save_link_key
, 0);
267 REISERFS_I(inode
)->i_flags
|=
268 i_link_saved_truncate_mask
;
269 /* not completed truncate found. New size was committed together
271 reiserfs_info(s
, "Truncating %k to %Ld ..",
272 INODE_PKEY(inode
), inode
->i_size
);
273 reiserfs_truncate_file(inode
,
275 /*don't update modification time */
277 retval
= remove_save_link(inode
, truncate
);
279 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
280 /* not completed unlink (rmdir) found */
281 reiserfs_info(s
, "Removing %k..", INODE_PKEY(inode
));
282 if (memcmp(&last_inode_key
, INODE_PKEY(inode
),
283 sizeof(last_inode_key
))){
284 last_inode_key
= *INODE_PKEY(inode
);
285 /* removal gets completed in iput */
288 reiserfs_warning(s
, "super-2189", "Dead loop "
289 "in finish_unfinished "
290 "detected, just remove "
292 retval
= remove_save_link_only(s
,
301 REISERFS_SB(s
)->s_is_unlinked_ok
= 0;
304 /* Turn quotas off */
305 for (i
= 0; i
< MAXQUOTAS
; i
++) {
306 if (sb_dqopt(s
)->files
[i
])
307 vfs_quota_off(s
, i
, 0);
310 /* Restore the flag back */
311 s
->s_flags
&= ~MS_ACTIVE
;
315 reiserfs_info(s
, "There were %d uncompleted unlinks/truncates. "
316 "Completed\n", done
);
320 /* to protect file being unlinked from getting lost we "safe" link files
321 being unlinked. This link will be deleted in the same transaction with last
322 item of file. mounting the filesystem we scan all these links and remove
323 files which almost got lost */
324 void add_save_link(struct reiserfs_transaction_handle
*th
,
325 struct inode
*inode
, int truncate
)
327 INITIALIZE_PATH(path
);
333 BUG_ON(!th
->t_trans_id
);
335 /* file can only get one "save link" of each kind */
337 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
),
338 "saved link already exists for truncated inode %lx",
341 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
),
342 "saved link already exists for unlinked inode %lx",
345 /* setup key of "save" link */
346 key
.version
= KEY_FORMAT_3_5
;
347 key
.on_disk_key
.k_dir_id
= MAX_KEY_OBJECTID
;
348 key
.on_disk_key
.k_objectid
= inode
->i_ino
;
350 /* unlink, rmdir, rename */
351 set_cpu_key_k_offset(&key
, 1 + inode
->i_sb
->s_blocksize
);
352 set_cpu_key_k_type(&key
, TYPE_DIRECT
);
354 /* item head of "safe" link */
355 make_le_item_head(&ih
, &key
, key
.version
,
356 1 + inode
->i_sb
->s_blocksize
, TYPE_DIRECT
,
357 4 /*length */ , 0xffff /*free space */ );
360 if (S_ISDIR(inode
->i_mode
))
361 reiserfs_warning(inode
->i_sb
, "green-2102",
362 "Adding a truncate savelink for "
363 "a directory %k! Please report",
365 set_cpu_key_k_offset(&key
, 1);
366 set_cpu_key_k_type(&key
, TYPE_INDIRECT
);
368 /* item head of "safe" link */
369 make_le_item_head(&ih
, &key
, key
.version
, 1, TYPE_INDIRECT
,
370 4 /*length */ , 0 /*free space */ );
374 /* look for its place in the tree */
375 retval
= search_item(inode
->i_sb
, &key
, &path
);
376 if (retval
!= ITEM_NOT_FOUND
) {
377 if (retval
!= -ENOSPC
)
378 reiserfs_error(inode
->i_sb
, "vs-2100",
379 "search_by_key (%K) returned %d", &key
,
385 /* body of "save" link */
386 link
= INODE_PKEY(inode
)->k_dir_id
;
388 /* put "save" link inot tree, don't charge quota to anyone */
390 reiserfs_insert_item(th
, &path
, &key
, &ih
, NULL
, (char *)&link
);
392 if (retval
!= -ENOSPC
)
393 reiserfs_error(inode
->i_sb
, "vs-2120",
394 "insert_item returned %d", retval
);
397 REISERFS_I(inode
)->i_flags
|=
398 i_link_saved_truncate_mask
;
400 REISERFS_I(inode
)->i_flags
|= i_link_saved_unlink_mask
;
404 /* this opens transaction unlike add_save_link */
405 int remove_save_link(struct inode
*inode
, int truncate
)
407 struct reiserfs_transaction_handle th
;
408 struct reiserfs_key key
;
411 /* we are going to do one balancing only */
412 err
= journal_begin(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
);
416 /* setup key of "save" link */
417 key
.k_dir_id
= cpu_to_le32(MAX_KEY_OBJECTID
);
418 key
.k_objectid
= INODE_PKEY(inode
)->k_objectid
;
420 /* unlink, rmdir, rename */
421 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
,
422 1 + inode
->i_sb
->s_blocksize
);
423 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_DIRECT
);
426 set_le_key_k_offset(KEY_FORMAT_3_5
, &key
, 1);
427 set_le_key_k_type(KEY_FORMAT_3_5
, &key
, TYPE_INDIRECT
);
431 (REISERFS_I(inode
)->i_flags
& i_link_saved_truncate_mask
)) ||
433 (REISERFS_I(inode
)->i_flags
& i_link_saved_unlink_mask
)))
434 /* don't take quota bytes from anywhere */
435 reiserfs_delete_solid_item(&th
, NULL
, &key
);
437 reiserfs_release_objectid(&th
, inode
->i_ino
);
438 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_unlink_mask
;
440 REISERFS_I(inode
)->i_flags
&= ~i_link_saved_truncate_mask
;
442 return journal_end(&th
, inode
->i_sb
, JOURNAL_PER_BALANCE_CNT
);
445 static void reiserfs_kill_sb(struct super_block
*s
)
447 if (REISERFS_SB(s
)) {
448 if (REISERFS_SB(s
)->xattr_root
) {
449 d_invalidate(REISERFS_SB(s
)->xattr_root
);
450 dput(REISERFS_SB(s
)->xattr_root
);
451 REISERFS_SB(s
)->xattr_root
= NULL
;
453 if (REISERFS_SB(s
)->priv_root
) {
454 d_invalidate(REISERFS_SB(s
)->priv_root
);
455 dput(REISERFS_SB(s
)->priv_root
);
456 REISERFS_SB(s
)->priv_root
= NULL
;
463 static void reiserfs_put_super(struct super_block
*s
)
465 struct reiserfs_transaction_handle th
;
468 reiserfs_write_lock(s
);
471 reiserfs_write_super(s
);
473 /* change file system state to current state if it was mounted with read-write permissions */
474 if (!(s
->s_flags
& MS_RDONLY
)) {
475 if (!journal_begin(&th
, s
, 10)) {
476 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
),
478 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s
),
479 REISERFS_SB(s
)->s_mount_state
);
480 journal_mark_dirty(&th
, s
, SB_BUFFER_WITH_SB(s
));
484 /* note, journal_release checks for readonly mount, and can decide not
485 ** to do a journal_end
487 journal_release(&th
, s
);
489 reiserfs_free_bitmap_cache(s
);
491 brelse(SB_BUFFER_WITH_SB(s
));
495 if (REISERFS_SB(s
)->reserved_blocks
!= 0) {
496 reiserfs_warning(s
, "green-2005", "reserved blocks left %d",
497 REISERFS_SB(s
)->reserved_blocks
);
500 reiserfs_proc_info_done(s
);
502 reiserfs_write_unlock(s
);
503 mutex_destroy(&REISERFS_SB(s
)->lock
);
508 static struct kmem_cache
*reiserfs_inode_cachep
;
510 static struct inode
*reiserfs_alloc_inode(struct super_block
*sb
)
512 struct reiserfs_inode_info
*ei
;
513 ei
= (struct reiserfs_inode_info
*)
514 kmem_cache_alloc(reiserfs_inode_cachep
, GFP_KERNEL
);
517 return &ei
->vfs_inode
;
520 static void reiserfs_destroy_inode(struct inode
*inode
)
522 kmem_cache_free(reiserfs_inode_cachep
, REISERFS_I(inode
));
525 static void init_once(void *foo
)
527 struct reiserfs_inode_info
*ei
= (struct reiserfs_inode_info
*)foo
;
529 INIT_LIST_HEAD(&ei
->i_prealloc_list
);
530 inode_init_once(&ei
->vfs_inode
);
533 static int init_inodecache(void)
535 reiserfs_inode_cachep
= kmem_cache_create("reiser_inode_cache",
537 reiserfs_inode_info
),
538 0, (SLAB_RECLAIM_ACCOUNT
|
541 if (reiserfs_inode_cachep
== NULL
)
546 static void destroy_inodecache(void)
548 kmem_cache_destroy(reiserfs_inode_cachep
);
551 /* we don't mark inodes dirty, we just log them */
552 static void reiserfs_dirty_inode(struct inode
*inode
)
554 struct reiserfs_transaction_handle th
;
559 if (inode
->i_sb
->s_flags
& MS_RDONLY
) {
560 reiserfs_warning(inode
->i_sb
, "clm-6006",
561 "writing inode %lu on readonly FS",
565 lock_depth
= reiserfs_write_lock_once(inode
->i_sb
);
567 /* this is really only used for atime updates, so they don't have
568 ** to be included in O_SYNC or fsync
570 err
= journal_begin(&th
, inode
->i_sb
, 1);
574 reiserfs_update_sd(&th
, inode
);
575 journal_end(&th
, inode
->i_sb
, 1);
578 reiserfs_write_unlock_once(inode
->i_sb
, lock_depth
);
582 static ssize_t
reiserfs_quota_write(struct super_block
*, int, const char *,
584 static ssize_t
reiserfs_quota_read(struct super_block
*, int, char *, size_t,
588 static const struct super_operations reiserfs_sops
= {
589 .alloc_inode
= reiserfs_alloc_inode
,
590 .destroy_inode
= reiserfs_destroy_inode
,
591 .write_inode
= reiserfs_write_inode
,
592 .dirty_inode
= reiserfs_dirty_inode
,
593 .delete_inode
= reiserfs_delete_inode
,
594 .put_super
= reiserfs_put_super
,
595 .write_super
= reiserfs_write_super
,
596 .sync_fs
= reiserfs_sync_fs
,
597 .freeze_fs
= reiserfs_freeze
,
598 .unfreeze_fs
= reiserfs_unfreeze
,
599 .statfs
= reiserfs_statfs
,
600 .remount_fs
= reiserfs_remount
,
601 .show_options
= generic_show_options
,
603 .quota_read
= reiserfs_quota_read
,
604 .quota_write
= reiserfs_quota_write
,
609 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
611 static int reiserfs_write_dquot(struct dquot
*);
612 static int reiserfs_acquire_dquot(struct dquot
*);
613 static int reiserfs_release_dquot(struct dquot
*);
614 static int reiserfs_mark_dquot_dirty(struct dquot
*);
615 static int reiserfs_write_info(struct super_block
*, int);
616 static int reiserfs_quota_on(struct super_block
*, int, int, char *, int);
618 static const struct dquot_operations reiserfs_quota_operations
= {
619 .initialize
= dquot_initialize
,
621 .alloc_inode
= dquot_alloc_inode
,
622 .free_inode
= dquot_free_inode
,
623 .transfer
= dquot_transfer
,
624 .write_dquot
= reiserfs_write_dquot
,
625 .acquire_dquot
= reiserfs_acquire_dquot
,
626 .release_dquot
= reiserfs_release_dquot
,
627 .mark_dirty
= reiserfs_mark_dquot_dirty
,
628 .write_info
= reiserfs_write_info
,
629 .alloc_dquot
= dquot_alloc
,
630 .destroy_dquot
= dquot_destroy
,
633 static const struct quotactl_ops reiserfs_qctl_operations
= {
634 .quota_on
= reiserfs_quota_on
,
635 .quota_off
= vfs_quota_off
,
636 .quota_sync
= vfs_quota_sync
,
637 .get_info
= vfs_get_dqinfo
,
638 .set_info
= vfs_set_dqinfo
,
639 .get_dqblk
= vfs_get_dqblk
,
640 .set_dqblk
= vfs_set_dqblk
,
644 static const struct export_operations reiserfs_export_ops
= {
645 .encode_fh
= reiserfs_encode_fh
,
646 .fh_to_dentry
= reiserfs_fh_to_dentry
,
647 .fh_to_parent
= reiserfs_fh_to_parent
,
648 .get_parent
= reiserfs_get_parent
,
651 /* this struct is used in reiserfs_getopt () for containing the value for those
652 mount options that have values rather than being toggles. */
655 int setmask
; /* bitmask which is to set on mount_options bitmask when this
656 value is found, 0 is no bits are to be changed. */
657 int clrmask
; /* bitmask which is to clear on mount_options bitmask when this
658 value is found, 0 is no bits are to be changed. This is
659 applied BEFORE setmask */
662 /* Set this bit in arg_required to allow empty arguments */
663 #define REISERFS_OPT_ALLOWEMPTY 31
665 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
669 int arg_required
; /* 0 if argument is not required, not 0 otherwise */
670 const arg_desc_t
*values
; /* list of values accepted by an option */
671 int setmask
; /* bitmask which is to set on mount_options bitmask when this
672 value is found, 0 is no bits are to be changed. */
673 int clrmask
; /* bitmask which is to clear on mount_options bitmask when this
674 value is found, 0 is no bits are to be changed. This is
675 applied BEFORE setmask */
678 /* possible values for -o data= */
679 static const arg_desc_t logging_mode
[] = {
680 {"ordered", 1 << REISERFS_DATA_ORDERED
,
681 (1 << REISERFS_DATA_LOG
| 1 << REISERFS_DATA_WRITEBACK
)},
682 {"journal", 1 << REISERFS_DATA_LOG
,
683 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_WRITEBACK
)},
684 {"writeback", 1 << REISERFS_DATA_WRITEBACK
,
685 (1 << REISERFS_DATA_ORDERED
| 1 << REISERFS_DATA_LOG
)},
689 /* possible values for -o barrier= */
690 static const arg_desc_t barrier_mode
[] = {
691 {"none", 1 << REISERFS_BARRIER_NONE
, 1 << REISERFS_BARRIER_FLUSH
},
692 {"flush", 1 << REISERFS_BARRIER_FLUSH
, 1 << REISERFS_BARRIER_NONE
},
696 /* possible values for "-o block-allocator=" and bits which are to be set in
697 s_mount_opt of reiserfs specific part of in-core super block */
698 static const arg_desc_t balloc
[] = {
699 {"noborder", 1 << REISERFS_NO_BORDER
, 0},
700 {"border", 0, 1 << REISERFS_NO_BORDER
},
701 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION
, 0},
702 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION
, 0},
703 {"test4", 1 << REISERFS_TEST4
, 0},
704 {"notest4", 0, 1 << REISERFS_TEST4
},
708 static const arg_desc_t tails
[] = {
709 {"on", 1 << REISERFS_LARGETAIL
, 1 << REISERFS_SMALLTAIL
},
710 {"off", 0, (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
711 {"small", 1 << REISERFS_SMALLTAIL
, 1 << REISERFS_LARGETAIL
},
715 static const arg_desc_t error_actions
[] = {
716 {"panic", 1 << REISERFS_ERROR_PANIC
,
717 (1 << REISERFS_ERROR_RO
| 1 << REISERFS_ERROR_CONTINUE
)},
718 {"ro-remount", 1 << REISERFS_ERROR_RO
,
719 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_CONTINUE
)},
720 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
721 {"continue", 1 << REISERFS_ERROR_CONTINUE
,
722 (1 << REISERFS_ERROR_PANIC
| 1 << REISERFS_ERROR_RO
)},
727 /* proceed only one option from a list *cur - string containing of mount options
728 opts - array of options which are accepted
729 opt_arg - if option is found and requires an argument and if it is specifed
730 in the input - pointer to the argument is stored here
731 bit_flags - if option requires to set a certain bit - it is set here
732 return -1 if unknown option is found, opt->arg_required otherwise */
733 static int reiserfs_getopt(struct super_block
*s
, char **cur
, opt_desc_t
* opts
,
734 char **opt_arg
, unsigned long *bit_flags
)
743 const opt_desc_t
*opt
;
744 const arg_desc_t
*arg
;
748 /* assume argument cannot contain commas */
749 *cur
= strchr(p
, ',');
755 if (!strncmp(p
, "alloc=", 6)) {
756 /* Ugly special case, probably we should redo options parser so that
757 it can understand several arguments for some options, also so that
758 it can fill several bitfields with option values. */
759 if (reiserfs_parse_alloc_options(s
, p
+ 6)) {
766 /* for every option in the list */
767 for (opt
= opts
; opt
->option_name
; opt
++) {
768 if (!strncmp(p
, opt
->option_name
, strlen(opt
->option_name
))) {
771 (1 << REISERFS_UNSUPPORTED_OPT
))
772 reiserfs_warning(s
, "super-6500",
773 "%s not supported.\n",
776 *bit_flags
&= ~opt
->clrmask
;
778 (1 << REISERFS_UNSUPPORTED_OPT
))
779 reiserfs_warning(s
, "super-6501",
780 "%s not supported.\n",
783 *bit_flags
|= opt
->setmask
;
788 if (!opt
->option_name
) {
789 reiserfs_warning(s
, "super-6502",
790 "unknown mount option \"%s\"", p
);
794 p
+= strlen(opt
->option_name
);
797 if (!opt
->arg_required
) {
798 reiserfs_warning(s
, "super-6503",
799 "the option \"%s\" does not "
800 "require an argument\n",
807 if (opt
->arg_required
) {
808 reiserfs_warning(s
, "super-6504",
809 "the option \"%s\" requires an "
810 "argument\n", opt
->option_name
);
815 reiserfs_warning(s
, "super-6505",
816 "head of option \"%s\" is only correct\n",
821 /* move to the argument, or to next option if argument is not required */
824 if (opt
->arg_required
825 && !(opt
->arg_required
& (1 << REISERFS_OPT_ALLOWEMPTY
))
827 /* this catches "option=," if not allowed */
828 reiserfs_warning(s
, "super-6506",
829 "empty argument for \"%s\"\n",
835 /* *=NULLopt_arg contains pointer to argument */
837 return opt
->arg_required
& ~(1 << REISERFS_OPT_ALLOWEMPTY
);
840 /* values possible for this option are listed in opt->values */
841 for (arg
= opt
->values
; arg
->value
; arg
++) {
842 if (!strcmp(p
, arg
->value
)) {
844 *bit_flags
&= ~arg
->clrmask
;
845 *bit_flags
|= arg
->setmask
;
847 return opt
->arg_required
;
851 reiserfs_warning(s
, "super-6506",
852 "bad value \"%s\" for option \"%s\"\n", p
,
857 /* returns 0 if something is wrong in option string, 1 - otherwise */
858 static int reiserfs_parse_options(struct super_block
*s
, char *options
, /* string given via mount's -o */
859 unsigned long *mount_options
,
860 /* after the parsing phase, contains the
861 collection of bitflags defining what
862 mount options were selected. */
863 unsigned long *blocks
, /* strtol-ed from NNN of resize=NNN */
865 unsigned int *commit_max_age
,
872 opt_desc_t opts
[] = {
873 /* Compatibility stuff, so that -o notail for old setups still work */
874 {"tails",.arg_required
= 't',.values
= tails
},
876 (1 << REISERFS_LARGETAIL
) | (1 << REISERFS_SMALLTAIL
)},
877 {"conv",.setmask
= 1 << REISERFS_CONVERT
},
878 {"attrs",.setmask
= 1 << REISERFS_ATTRS
},
879 {"noattrs",.clrmask
= 1 << REISERFS_ATTRS
},
880 {"expose_privroot", .setmask
= 1 << REISERFS_EXPOSE_PRIVROOT
},
881 #ifdef CONFIG_REISERFS_FS_XATTR
882 {"user_xattr",.setmask
= 1 << REISERFS_XATTRS_USER
},
883 {"nouser_xattr",.clrmask
= 1 << REISERFS_XATTRS_USER
},
885 {"user_xattr",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
886 {"nouser_xattr",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
888 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
889 {"acl",.setmask
= 1 << REISERFS_POSIXACL
},
890 {"noacl",.clrmask
= 1 << REISERFS_POSIXACL
},
892 {"acl",.setmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
893 {"noacl",.clrmask
= 1 << REISERFS_UNSUPPORTED_OPT
},
895 {.option_name
= "nolog"},
896 {"replayonly",.setmask
= 1 << REPLAYONLY
},
897 {"block-allocator",.arg_required
= 'a',.values
= balloc
},
898 {"data",.arg_required
= 'd',.values
= logging_mode
},
899 {"barrier",.arg_required
= 'b',.values
= barrier_mode
},
900 {"resize",.arg_required
= 'r',.values
= NULL
},
901 {"jdev",.arg_required
= 'j',.values
= NULL
},
902 {"nolargeio",.arg_required
= 'w',.values
= NULL
},
903 {"commit",.arg_required
= 'c',.values
= NULL
},
904 {"usrquota",.setmask
= 1 << REISERFS_QUOTA
},
905 {"grpquota",.setmask
= 1 << REISERFS_QUOTA
},
906 {"noquota",.clrmask
= 1 << REISERFS_QUOTA
},
907 {"errors",.arg_required
= 'e',.values
= error_actions
},
908 {"usrjquota",.arg_required
=
909 'u' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
910 {"grpjquota",.arg_required
=
911 'g' | (1 << REISERFS_OPT_ALLOWEMPTY
),.values
= NULL
},
912 {"jqfmt",.arg_required
= 'f',.values
= NULL
},
913 {.option_name
= NULL
}
917 if (!options
|| !*options
)
918 /* use default configuration: create tails, journaling on, no
919 conversion to newest format */
922 for (pos
= options
; pos
;) {
923 c
= reiserfs_getopt(s
, &pos
, opts
, &arg
, mount_options
);
925 /* wrong option is given */
932 /* "resize=NNN" or "resize=auto" */
934 if (!strcmp(arg
, "auto")) {
935 /* From JFS code, to auto-get the size. */
937 s
->s_bdev
->bd_inode
->i_size
>> s
->
940 *blocks
= simple_strtoul(arg
, &p
, 0);
942 /* NNN does not look like a number */
943 reiserfs_warning(s
, "super-6507",
953 unsigned long val
= simple_strtoul(arg
, &p
, 0);
954 /* commit=NNN (time in seconds) */
955 if (*p
!= '\0' || val
>= (unsigned int)-1) {
956 reiserfs_warning(s
, "super-6508",
957 "bad value %s for -ocommit\n",
961 *commit_max_age
= (unsigned int)val
;
965 reiserfs_warning(s
, "super-6509", "nolargeio option "
966 "is no longer supported");
971 if (arg
&& *arg
&& jdev_name
) {
972 if (*jdev_name
) { //Hm, already assigned?
973 reiserfs_warning(s
, "super-6510",
974 "journal device was "
975 "already specified to "
976 "be %s", *jdev_name
);
983 if (c
== 'u' || c
== 'g') {
984 int qtype
= c
== 'u' ? USRQUOTA
: GRPQUOTA
;
986 if (sb_any_quota_loaded(s
) &&
987 (!*arg
!= !REISERFS_SB(s
)->s_qf_names
[qtype
])) {
988 reiserfs_warning(s
, "super-6511",
989 "cannot change journaled "
990 "quota options when quota "
994 if (*arg
) { /* Some filename specified? */
995 if (REISERFS_SB(s
)->s_qf_names
[qtype
]
996 && strcmp(REISERFS_SB(s
)->s_qf_names
[qtype
],
998 reiserfs_warning(s
, "super-6512",
1000 "already specified.",
1004 if (strchr(arg
, '/')) {
1005 reiserfs_warning(s
, "super-6513",
1006 "quotafile must be "
1007 "on filesystem root.");
1011 kmalloc(strlen(arg
) + 1, GFP_KERNEL
);
1012 if (!qf_names
[qtype
]) {
1013 reiserfs_warning(s
, "reiserfs-2502",
1014 "not enough memory "
1019 strcpy(qf_names
[qtype
], arg
);
1020 *mount_options
|= 1 << REISERFS_QUOTA
;
1022 if (qf_names
[qtype
] !=
1023 REISERFS_SB(s
)->s_qf_names
[qtype
])
1024 kfree(qf_names
[qtype
]);
1025 qf_names
[qtype
] = NULL
;
1029 if (!strcmp(arg
, "vfsold"))
1030 *qfmt
= QFMT_VFS_OLD
;
1031 else if (!strcmp(arg
, "vfsv0"))
1032 *qfmt
= QFMT_VFS_V0
;
1034 reiserfs_warning(s
, "super-6514",
1035 "unknown quota format "
1039 if (sb_any_quota_loaded(s
) &&
1040 *qfmt
!= REISERFS_SB(s
)->s_jquota_fmt
) {
1041 reiserfs_warning(s
, "super-6515",
1042 "cannot change journaled "
1043 "quota options when quota "
1049 if (c
== 'u' || c
== 'g' || c
== 'f') {
1050 reiserfs_warning(s
, "reiserfs-2503", "journaled "
1051 "quota options not supported.");
1058 if (!REISERFS_SB(s
)->s_jquota_fmt
&& !*qfmt
1059 && (qf_names
[USRQUOTA
] || qf_names
[GRPQUOTA
])) {
1060 reiserfs_warning(s
, "super-6515",
1061 "journaled quota format not specified.");
1064 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1065 if (!(*mount_options
& (1 << REISERFS_QUOTA
))
1066 && sb_any_quota_loaded(s
)) {
1067 reiserfs_warning(s
, "super-6516", "quota options must "
1068 "be present when quota is turned on.");
1076 static void switch_data_mode(struct super_block
*s
, unsigned long mode
)
1078 REISERFS_SB(s
)->s_mount_opt
&= ~((1 << REISERFS_DATA_LOG
) |
1079 (1 << REISERFS_DATA_ORDERED
) |
1080 (1 << REISERFS_DATA_WRITEBACK
));
1081 REISERFS_SB(s
)->s_mount_opt
|= (1 << mode
);
1084 static void handle_data_mode(struct super_block
*s
, unsigned long mount_options
)
1086 if (mount_options
& (1 << REISERFS_DATA_LOG
)) {
1087 if (!reiserfs_data_log(s
)) {
1088 switch_data_mode(s
, REISERFS_DATA_LOG
);
1089 reiserfs_info(s
, "switching to journaled data mode\n");
1091 } else if (mount_options
& (1 << REISERFS_DATA_ORDERED
)) {
1092 if (!reiserfs_data_ordered(s
)) {
1093 switch_data_mode(s
, REISERFS_DATA_ORDERED
);
1094 reiserfs_info(s
, "switching to ordered data mode\n");
1096 } else if (mount_options
& (1 << REISERFS_DATA_WRITEBACK
)) {
1097 if (!reiserfs_data_writeback(s
)) {
1098 switch_data_mode(s
, REISERFS_DATA_WRITEBACK
);
1099 reiserfs_info(s
, "switching to writeback data mode\n");
1104 static void handle_barrier_mode(struct super_block
*s
, unsigned long bits
)
1106 int flush
= (1 << REISERFS_BARRIER_FLUSH
);
1107 int none
= (1 << REISERFS_BARRIER_NONE
);
1108 int all_barrier
= flush
| none
;
1110 if (bits
& all_barrier
) {
1111 REISERFS_SB(s
)->s_mount_opt
&= ~all_barrier
;
1113 REISERFS_SB(s
)->s_mount_opt
|= flush
;
1114 printk("reiserfs: enabling write barrier flush mode\n");
1115 } else if (bits
& none
) {
1116 REISERFS_SB(s
)->s_mount_opt
|= none
;
1117 printk("reiserfs: write barriers turned off\n");
1122 static void handle_attrs(struct super_block
*s
)
1124 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(s
);
1126 if (reiserfs_attrs(s
)) {
1127 if (old_format_only(s
)) {
1128 reiserfs_warning(s
, "super-6517", "cannot support "
1129 "attributes on 3.5.x disk format");
1130 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1133 if (!(le32_to_cpu(rs
->s_flags
) & reiserfs_attrs_cleared
)) {
1134 reiserfs_warning(s
, "super-6518", "cannot support "
1135 "attributes until flag is set in "
1137 REISERFS_SB(s
)->s_mount_opt
&= ~(1 << REISERFS_ATTRS
);
1143 static void handle_quota_files(struct super_block
*s
, char **qf_names
,
1148 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1149 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1150 kfree(REISERFS_SB(s
)->s_qf_names
[i
]);
1151 REISERFS_SB(s
)->s_qf_names
[i
] = qf_names
[i
];
1153 REISERFS_SB(s
)->s_jquota_fmt
= *qfmt
;
1157 static int reiserfs_remount(struct super_block
*s
, int *mount_flags
, char *arg
)
1159 struct reiserfs_super_block
*rs
;
1160 struct reiserfs_transaction_handle th
;
1161 unsigned long blocks
;
1162 unsigned long mount_options
= REISERFS_SB(s
)->s_mount_opt
;
1163 unsigned long safe_mask
= 0;
1164 unsigned int commit_max_age
= (unsigned int)-1;
1165 struct reiserfs_journal
*journal
= SB_JOURNAL(s
);
1166 char *new_opts
= kstrdup(arg
, GFP_KERNEL
);
1168 char *qf_names
[MAXQUOTAS
];
1169 unsigned int qfmt
= 0;
1174 reiserfs_write_lock(s
);
1177 memcpy(qf_names
, REISERFS_SB(s
)->s_qf_names
, sizeof(qf_names
));
1180 rs
= SB_DISK_SUPER_BLOCK(s
);
1182 if (!reiserfs_parse_options
1183 (s
, arg
, &mount_options
, &blocks
, NULL
, &commit_max_age
,
1186 for (i
= 0; i
< MAXQUOTAS
; i
++)
1187 if (qf_names
[i
] != REISERFS_SB(s
)->s_qf_names
[i
])
1194 handle_quota_files(s
, qf_names
, &qfmt
);
1199 /* Add options that are safe here */
1200 safe_mask
|= 1 << REISERFS_SMALLTAIL
;
1201 safe_mask
|= 1 << REISERFS_LARGETAIL
;
1202 safe_mask
|= 1 << REISERFS_NO_BORDER
;
1203 safe_mask
|= 1 << REISERFS_NO_UNHASHED_RELOCATION
;
1204 safe_mask
|= 1 << REISERFS_HASHED_RELOCATION
;
1205 safe_mask
|= 1 << REISERFS_TEST4
;
1206 safe_mask
|= 1 << REISERFS_ATTRS
;
1207 safe_mask
|= 1 << REISERFS_XATTRS_USER
;
1208 safe_mask
|= 1 << REISERFS_POSIXACL
;
1209 safe_mask
|= 1 << REISERFS_BARRIER_FLUSH
;
1210 safe_mask
|= 1 << REISERFS_BARRIER_NONE
;
1211 safe_mask
|= 1 << REISERFS_ERROR_RO
;
1212 safe_mask
|= 1 << REISERFS_ERROR_CONTINUE
;
1213 safe_mask
|= 1 << REISERFS_ERROR_PANIC
;
1214 safe_mask
|= 1 << REISERFS_QUOTA
;
1216 /* Update the bitmask, taking care to keep
1217 * the bits we're not allowed to change here */
1218 REISERFS_SB(s
)->s_mount_opt
=
1220 s_mount_opt
& ~safe_mask
) | (mount_options
& safe_mask
);
1222 if (commit_max_age
!= 0 && commit_max_age
!= (unsigned int)-1) {
1223 journal
->j_max_commit_age
= commit_max_age
;
1224 journal
->j_max_trans_age
= commit_max_age
;
1225 } else if (commit_max_age
== 0) {
1226 /* 0 means restore defaults. */
1227 journal
->j_max_commit_age
= journal
->j_default_max_commit_age
;
1228 journal
->j_max_trans_age
= JOURNAL_MAX_TRANS_AGE
;
1232 err
= reiserfs_resize(s
, blocks
);
1237 if (*mount_flags
& MS_RDONLY
) {
1238 reiserfs_xattr_init(s
, *mount_flags
);
1239 /* remount read-only */
1240 if (s
->s_flags
& MS_RDONLY
)
1241 /* it is read-only already */
1243 /* try to remount file system with read-only permissions */
1244 if (sb_umount_state(rs
) == REISERFS_VALID_FS
1245 || REISERFS_SB(s
)->s_mount_state
!= REISERFS_VALID_FS
) {
1249 err
= journal_begin(&th
, s
, 10);
1253 /* Mounting a rw partition read-only. */
1254 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1255 set_sb_umount_state(rs
, REISERFS_SB(s
)->s_mount_state
);
1256 journal_mark_dirty(&th
, s
, SB_BUFFER_WITH_SB(s
));
1258 /* remount read-write */
1259 if (!(s
->s_flags
& MS_RDONLY
)) {
1260 reiserfs_xattr_init(s
, *mount_flags
);
1261 goto out_ok
; /* We are read-write already */
1264 if (reiserfs_is_journal_aborted(journal
)) {
1265 err
= journal
->j_errno
;
1269 handle_data_mode(s
, mount_options
);
1270 handle_barrier_mode(s
, mount_options
);
1271 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1272 s
->s_flags
&= ~MS_RDONLY
; /* now it is safe to call journal_begin */
1273 err
= journal_begin(&th
, s
, 10);
1277 /* Mount a partition which is read-only, read-write */
1278 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1279 REISERFS_SB(s
)->s_mount_state
= sb_umount_state(rs
);
1280 s
->s_flags
&= ~MS_RDONLY
;
1281 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
1282 if (!old_format_only(s
))
1283 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
1284 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1285 journal_mark_dirty(&th
, s
, SB_BUFFER_WITH_SB(s
));
1286 REISERFS_SB(s
)->s_mount_state
= REISERFS_VALID_FS
;
1288 /* this will force a full flush of all journal lists */
1289 SB_JOURNAL(s
)->j_must_wait
= 1;
1290 err
= journal_end(&th
, s
, 10);
1295 if (!(*mount_flags
& MS_RDONLY
)) {
1296 finish_unfinished(s
);
1297 reiserfs_xattr_init(s
, *mount_flags
);
1301 replace_mount_options(s
, new_opts
);
1302 reiserfs_write_unlock(s
);
1307 reiserfs_write_unlock(s
);
1311 static int read_super_block(struct super_block
*s
, int offset
)
1313 struct buffer_head
*bh
;
1314 struct reiserfs_super_block
*rs
;
1317 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1319 reiserfs_warning(s
, "sh-2006",
1320 "bread failed (dev %s, block %lu, size %lu)",
1321 reiserfs_bdevname(s
), offset
/ s
->s_blocksize
,
1326 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1327 if (!is_any_reiserfs_magic_string(rs
)) {
1332 // ok, reiserfs signature (old or new) found in at the given offset
1334 fs_blocksize
= sb_blocksize(rs
);
1336 sb_set_blocksize(s
, fs_blocksize
);
1338 bh
= sb_bread(s
, offset
/ s
->s_blocksize
);
1340 reiserfs_warning(s
, "sh-2007",
1341 "bread failed (dev %s, block %lu, size %lu)",
1342 reiserfs_bdevname(s
), offset
/ s
->s_blocksize
,
1347 rs
= (struct reiserfs_super_block
*)bh
->b_data
;
1348 if (sb_blocksize(rs
) != s
->s_blocksize
) {
1349 reiserfs_warning(s
, "sh-2011", "can't find a reiserfs "
1350 "filesystem on (dev %s, block %Lu, size %lu)",
1351 reiserfs_bdevname(s
),
1352 (unsigned long long)bh
->b_blocknr
,
1358 if (rs
->s_v1
.s_root_block
== cpu_to_le32(-1)) {
1360 reiserfs_warning(s
, "super-6519", "Unfinished reiserfsck "
1361 "--rebuild-tree run detected. Please run\n"
1362 "reiserfsck --rebuild-tree and wait for a "
1363 "completion. If that fails\n"
1364 "get newer reiserfsprogs package");
1368 SB_BUFFER_WITH_SB(s
) = bh
;
1369 SB_DISK_SUPER_BLOCK(s
) = rs
;
1371 if (is_reiserfs_jr(rs
)) {
1372 /* magic is of non-standard journal filesystem, look at s_version to
1373 find which format is in use */
1374 if (sb_version(rs
) == REISERFS_VERSION_2
)
1375 reiserfs_info(s
, "found reiserfs format \"3.6\""
1376 " with non-standard journal\n");
1377 else if (sb_version(rs
) == REISERFS_VERSION_1
)
1378 reiserfs_info(s
, "found reiserfs format \"3.5\""
1379 " with non-standard journal\n");
1381 reiserfs_warning(s
, "sh-2012", "found unknown "
1382 "format \"%u\" of reiserfs with "
1383 "non-standard magic", sb_version(rs
));
1387 /* s_version of standard format may contain incorrect information,
1388 so we just look at the magic string */
1390 "found reiserfs format \"%s\" with standard journal\n",
1391 is_reiserfs_3_5(rs
) ? "3.5" : "3.6");
1393 s
->s_op
= &reiserfs_sops
;
1394 s
->s_export_op
= &reiserfs_export_ops
;
1396 s
->s_qcop
= &reiserfs_qctl_operations
;
1397 s
->dq_op
= &reiserfs_quota_operations
;
1400 /* new format is limited by the 32 bit wide i_blocks field, want to
1401 ** be one full block below that.
1403 s
->s_maxbytes
= (512LL << 32) - s
->s_blocksize
;
1407 /* after journal replay, reread all bitmap and super blocks */
1408 static int reread_meta_blocks(struct super_block
*s
)
1410 ll_rw_block(READ
, 1, &(SB_BUFFER_WITH_SB(s
)));
1411 reiserfs_write_unlock(s
);
1412 wait_on_buffer(SB_BUFFER_WITH_SB(s
));
1413 reiserfs_write_lock(s
);
1414 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s
))) {
1415 reiserfs_warning(s
, "reiserfs-2504", "error reading the super");
1422 /////////////////////////////////////////////////////
1423 // hash detection stuff
1425 // if root directory is empty - we set default - Yura's - hash and
1427 // FIXME: we look for only one name in a directory. If tea and yura
1428 // bith have the same value - we ask user to send report to the
1430 static __u32
find_hash_out(struct super_block
*s
)
1433 struct inode
*inode
;
1435 INITIALIZE_PATH(path
);
1436 struct reiserfs_dir_entry de
;
1437 __u32 hash
= DEFAULT_HASH
;
1439 inode
= s
->s_root
->d_inode
;
1441 do { // Some serious "goto"-hater was there ;)
1442 u32 teahash
, r5hash
, yurahash
;
1444 make_cpu_key(&key
, inode
, ~0, TYPE_DIRENTRY
, 3);
1445 retval
= search_by_entry_key(s
, &key
, &path
, &de
);
1446 if (retval
== IO_ERROR
) {
1450 if (retval
== NAME_NOT_FOUND
)
1452 set_de_name_and_namelen(&de
);
1453 if (deh_offset(&(de
.de_deh
[de
.de_entry_num
])) == DOT_DOT_OFFSET
) {
1454 /* allow override in this case */
1455 if (reiserfs_rupasov_hash(s
)) {
1458 reiserfs_info(s
, "FS seems to be empty, autodetect "
1459 "is using the default hash\n");
1462 r5hash
= GET_HASH_VALUE(r5_hash(de
.de_name
, de
.de_namelen
));
1463 teahash
= GET_HASH_VALUE(keyed_hash(de
.de_name
, de
.de_namelen
));
1464 yurahash
= GET_HASH_VALUE(yura_hash(de
.de_name
, de
.de_namelen
));
1465 if (((teahash
== r5hash
)
1467 (GET_HASH_VALUE(deh_offset(&(de
.de_deh
[de
.de_entry_num
])))
1468 == r5hash
)) || ((teahash
== yurahash
)
1470 GET_HASH_VALUE(deh_offset
1475 || ((r5hash
== yurahash
)
1477 GET_HASH_VALUE(deh_offset
1478 (&(de
.de_deh
[de
.de_entry_num
])))))) {
1479 reiserfs_warning(s
, "reiserfs-2506", "Unable to "
1480 "automatically detect hash function. "
1481 "Please mount with -o "
1482 "hash={tea,rupasov,r5}");
1486 if (GET_HASH_VALUE(deh_offset(&(de
.de_deh
[de
.de_entry_num
]))) ==
1489 else if (GET_HASH_VALUE
1490 (deh_offset(&(de
.de_deh
[de
.de_entry_num
]))) == teahash
)
1492 else if (GET_HASH_VALUE
1493 (deh_offset(&(de
.de_deh
[de
.de_entry_num
]))) == r5hash
)
1496 reiserfs_warning(s
, "reiserfs-2506",
1497 "Unrecognised hash function");
1506 // finds out which hash names are sorted with
1507 static int what_hash(struct super_block
*s
)
1511 code
= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
));
1513 /* reiserfs_hash_detect() == true if any of the hash mount options
1514 ** were used. We must check them to make sure the user isn't
1515 ** using a bad hash value
1517 if (code
== UNSET_HASH
|| reiserfs_hash_detect(s
))
1518 code
= find_hash_out(s
);
1520 if (code
!= UNSET_HASH
&& reiserfs_hash_detect(s
)) {
1521 /* detection has found the hash, and we must check against the
1524 if (reiserfs_rupasov_hash(s
) && code
!= YURA_HASH
) {
1525 reiserfs_warning(s
, "reiserfs-2507",
1526 "Error, %s hash detected, "
1527 "unable to force rupasov hash",
1528 reiserfs_hashname(code
));
1530 } else if (reiserfs_tea_hash(s
) && code
!= TEA_HASH
) {
1531 reiserfs_warning(s
, "reiserfs-2508",
1532 "Error, %s hash detected, "
1533 "unable to force tea hash",
1534 reiserfs_hashname(code
));
1536 } else if (reiserfs_r5_hash(s
) && code
!= R5_HASH
) {
1537 reiserfs_warning(s
, "reiserfs-2509",
1538 "Error, %s hash detected, "
1539 "unable to force r5 hash",
1540 reiserfs_hashname(code
));
1544 /* find_hash_out was not called or could not determine the hash */
1545 if (reiserfs_rupasov_hash(s
)) {
1547 } else if (reiserfs_tea_hash(s
)) {
1549 } else if (reiserfs_r5_hash(s
)) {
1554 /* if we are mounted RW, and we have a new valid hash code, update
1557 if (code
!= UNSET_HASH
&&
1558 !(s
->s_flags
& MS_RDONLY
) &&
1559 code
!= sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
))) {
1560 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s
), code
);
1565 // return pointer to appropriate function
1566 static hashf_t
hash_function(struct super_block
*s
)
1568 switch (what_hash(s
)) {
1570 reiserfs_info(s
, "Using tea hash to sort names\n");
1573 reiserfs_info(s
, "Using rupasov hash to sort names\n");
1576 reiserfs_info(s
, "Using r5 hash to sort names\n");
1582 // this is used to set up correct value for old partitions
1583 static int function2code(hashf_t func
)
1585 if (func
== keyed_hash
)
1587 if (func
== yura_hash
)
1589 if (func
== r5_hash
)
1592 BUG(); // should never happen
1597 #define SWARN(silent, s, id, ...) \
1599 reiserfs_warning(s, id, __VA_ARGS__)
1601 static int reiserfs_fill_super(struct super_block
*s
, void *data
, int silent
)
1603 struct inode
*root_inode
;
1604 struct reiserfs_transaction_handle th
;
1606 unsigned long blocks
;
1607 unsigned int commit_max_age
= 0;
1609 struct reiserfs_iget_args args
;
1610 struct reiserfs_super_block
*rs
;
1612 struct reiserfs_sb_info
*sbi
;
1613 int errval
= -EINVAL
;
1614 char *qf_names
[MAXQUOTAS
] = {};
1615 unsigned int qfmt
= 0;
1617 save_mount_options(s
, data
);
1619 sbi
= kzalloc(sizeof(struct reiserfs_sb_info
), GFP_KERNEL
);
1625 /* Set default values for options: non-aggressive tails, RO on errors */
1626 REISERFS_SB(s
)->s_mount_opt
|= (1 << REISERFS_SMALLTAIL
);
1627 REISERFS_SB(s
)->s_mount_opt
|= (1 << REISERFS_ERROR_RO
);
1628 /* no preallocation minimum, be smart in
1629 reiserfs_file_write instead */
1630 REISERFS_SB(s
)->s_alloc_options
.preallocmin
= 0;
1631 /* Preallocate by 16 blocks (17-1) at once */
1632 REISERFS_SB(s
)->s_alloc_options
.preallocsize
= 17;
1633 /* setup default block allocator options */
1634 reiserfs_init_alloc_options(s
);
1636 mutex_init(&REISERFS_SB(s
)->lock
);
1637 REISERFS_SB(s
)->lock_depth
= -1;
1640 * This function is called with the bkl, which also was the old
1641 * locking used here.
1642 * do_journal_begin() will soon check if we hold the lock (ie: was the
1643 * bkl). This is likely because do_journal_begin() has several another
1644 * callers because at this time, it doesn't seem to be necessary to
1645 * protect against anything.
1646 * Anyway, let's be conservative and lock for now.
1648 reiserfs_write_lock(s
);
1651 if (reiserfs_parse_options
1652 (s
, (char *)data
, &(sbi
->s_mount_opt
), &blocks
, &jdev_name
,
1653 &commit_max_age
, qf_names
, &qfmt
) == 0) {
1657 handle_quota_files(s
, qf_names
, &qfmt
);
1661 SWARN(silent
, s
, "jmacd-7", "resize option for remount only");
1665 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1666 if (!read_super_block(s
, REISERFS_OLD_DISK_OFFSET_IN_BYTES
))
1668 /* try new format (64-th 1k block), which can contain reiserfs super block */
1669 else if (read_super_block(s
, REISERFS_DISK_OFFSET_IN_BYTES
)) {
1670 SWARN(silent
, s
, "sh-2021", "can not find reiserfs on %s",
1671 reiserfs_bdevname(s
));
1675 rs
= SB_DISK_SUPER_BLOCK(s
);
1676 /* Let's do basic sanity check to verify that underlying device is not
1677 smaller than the filesystem. If the check fails then abort and scream,
1678 because bad stuff will happen otherwise. */
1679 if (s
->s_bdev
&& s
->s_bdev
->bd_inode
1680 && i_size_read(s
->s_bdev
->bd_inode
) <
1681 sb_block_count(rs
) * sb_blocksize(rs
)) {
1682 SWARN(silent
, s
, "", "Filesystem cannot be "
1683 "mounted because it is bigger than the device");
1684 SWARN(silent
, s
, "", "You may need to run fsck "
1685 "or increase size of your LVM partition");
1686 SWARN(silent
, s
, "", "Or may be you forgot to "
1687 "reboot after fdisk when it told you to");
1691 sbi
->s_mount_state
= SB_REISERFS_STATE(s
);
1692 sbi
->s_mount_state
= REISERFS_VALID_FS
;
1694 if ((errval
= reiserfs_init_bitmap_cache(s
))) {
1695 SWARN(silent
, s
, "jmacd-8", "unable to read bitmap");
1699 #ifdef CONFIG_REISERFS_CHECK
1700 SWARN(silent
, s
, "", "CONFIG_REISERFS_CHECK is set ON");
1701 SWARN(silent
, s
, "", "- it is slow mode for debugging.");
1704 /* make data=ordered the default */
1705 if (!reiserfs_data_log(s
) && !reiserfs_data_ordered(s
) &&
1706 !reiserfs_data_writeback(s
)) {
1707 REISERFS_SB(s
)->s_mount_opt
|= (1 << REISERFS_DATA_ORDERED
);
1710 if (reiserfs_data_log(s
)) {
1711 reiserfs_info(s
, "using journaled data mode\n");
1712 } else if (reiserfs_data_ordered(s
)) {
1713 reiserfs_info(s
, "using ordered data mode\n");
1715 reiserfs_info(s
, "using writeback data mode\n");
1717 if (reiserfs_barrier_flush(s
)) {
1718 printk("reiserfs: using flush barriers\n");
1720 // set_device_ro(s->s_dev, 1) ;
1721 if (journal_init(s
, jdev_name
, old_format
, commit_max_age
)) {
1722 SWARN(silent
, s
, "sh-2022",
1723 "unable to initialize journal space");
1726 jinit_done
= 1; /* once this is set, journal_release must be called
1727 ** if we error out of the mount
1730 if (reread_meta_blocks(s
)) {
1731 SWARN(silent
, s
, "jmacd-9",
1732 "unable to reread meta blocks after journal init");
1739 if (bdev_read_only(s
->s_bdev
) && !(s
->s_flags
& MS_RDONLY
)) {
1740 SWARN(silent
, s
, "clm-7000",
1741 "Detected readonly device, marking FS readonly");
1742 s
->s_flags
|= MS_RDONLY
;
1744 args
.objectid
= REISERFS_ROOT_OBJECTID
;
1745 args
.dirid
= REISERFS_ROOT_PARENT_OBJECTID
;
1747 iget5_locked(s
, REISERFS_ROOT_OBJECTID
, reiserfs_find_actor
,
1748 reiserfs_init_locked_inode
, (void *)(&args
));
1750 SWARN(silent
, s
, "jmacd-10", "get root inode failed");
1754 if (root_inode
->i_state
& I_NEW
) {
1755 reiserfs_read_locked_inode(root_inode
, &args
);
1756 unlock_new_inode(root_inode
);
1759 s
->s_root
= d_alloc_root(root_inode
);
1764 // define and initialize hash function
1765 sbi
->s_hash_function
= hash_function(s
);
1766 if (sbi
->s_hash_function
== NULL
) {
1772 if (is_reiserfs_3_5(rs
)
1773 || (is_reiserfs_jr(rs
) && SB_VERSION(s
) == REISERFS_VERSION_1
))
1774 set_bit(REISERFS_3_5
, &(sbi
->s_properties
));
1775 else if (old_format
)
1776 set_bit(REISERFS_OLD_FORMAT
, &(sbi
->s_properties
));
1778 set_bit(REISERFS_3_6
, &(sbi
->s_properties
));
1780 if (!(s
->s_flags
& MS_RDONLY
)) {
1782 errval
= journal_begin(&th
, s
, 1);
1788 reiserfs_prepare_for_journal(s
, SB_BUFFER_WITH_SB(s
), 1);
1790 set_sb_umount_state(rs
, REISERFS_ERROR_FS
);
1791 set_sb_fs_state(rs
, 0);
1793 /* Clear out s_bmap_nr if it would wrap. We can handle this
1794 * case, but older revisions can't. This will cause the
1795 * file system to fail mount on those older implementations,
1796 * avoiding corruption. -jeffm */
1797 if (bmap_would_wrap(reiserfs_bmap_count(s
)) &&
1798 sb_bmap_nr(rs
) != 0) {
1799 reiserfs_warning(s
, "super-2030", "This file system "
1800 "claims to use %u bitmap blocks in "
1801 "its super block, but requires %u. "
1802 "Clearing to zero.", sb_bmap_nr(rs
),
1803 reiserfs_bmap_count(s
));
1805 set_sb_bmap_nr(rs
, 0);
1808 if (old_format_only(s
)) {
1809 /* filesystem of format 3.5 either with standard or non-standard
1811 if (convert_reiserfs(s
)) {
1812 /* and -o conv is given */
1815 "converting 3.5 filesystem to the 3.6 format");
1817 if (is_reiserfs_3_5(rs
))
1818 /* put magic string of 3.6 format. 2.2 will not be able to
1819 mount this filesystem anymore */
1820 memcpy(rs
->s_v1
.s_magic
,
1821 reiserfs_3_6_magic_string
,
1823 (reiserfs_3_6_magic_string
));
1825 set_sb_version(rs
, REISERFS_VERSION_2
);
1826 reiserfs_convert_objectid_map_v1(s
);
1827 set_bit(REISERFS_3_6
, &(sbi
->s_properties
));
1828 clear_bit(REISERFS_3_5
, &(sbi
->s_properties
));
1829 } else if (!silent
) {
1830 reiserfs_info(s
, "using 3.5.x disk format\n");
1833 set_sb_mnt_count(rs
, sb_mnt_count(rs
) + 1);
1836 journal_mark_dirty(&th
, s
, SB_BUFFER_WITH_SB(s
));
1837 errval
= journal_end(&th
, s
, 1);
1844 if ((errval
= reiserfs_lookup_privroot(s
)) ||
1845 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
1851 /* look for files which were to be removed in previous session */
1852 finish_unfinished(s
);
1854 if (old_format_only(s
) && !silent
) {
1855 reiserfs_info(s
, "using 3.5.x disk format\n");
1858 if ((errval
= reiserfs_lookup_privroot(s
)) ||
1859 (errval
= reiserfs_xattr_init(s
, s
->s_flags
))) {
1865 // mark hash in super block: it could be unset. overwrite should be ok
1866 set_sb_hash_function_code(rs
, function2code(sbi
->s_hash_function
));
1870 reiserfs_proc_info_init(s
);
1872 init_waitqueue_head(&(sbi
->s_wait
));
1873 spin_lock_init(&sbi
->bitmap_lock
);
1875 reiserfs_write_unlock(s
);
1880 reiserfs_write_unlock(s
);
1882 if (jinit_done
) { /* kill the commit thread, free journal ram */
1883 journal_release_error(NULL
, s
);
1886 reiserfs_free_bitmap_cache(s
);
1887 if (SB_BUFFER_WITH_SB(s
))
1888 brelse(SB_BUFFER_WITH_SB(s
));
1892 for (j
= 0; j
< MAXQUOTAS
; j
++)
1898 s
->s_fs_info
= NULL
;
1902 static int reiserfs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
1904 struct reiserfs_super_block
*rs
= SB_DISK_SUPER_BLOCK(dentry
->d_sb
);
1906 buf
->f_namelen
= (REISERFS_MAX_NAME(s
->s_blocksize
));
1907 buf
->f_bfree
= sb_free_blocks(rs
);
1908 buf
->f_bavail
= buf
->f_bfree
;
1909 buf
->f_blocks
= sb_block_count(rs
) - sb_bmap_nr(rs
) - 1;
1910 buf
->f_bsize
= dentry
->d_sb
->s_blocksize
;
1911 /* changed to accommodate gcc folks. */
1912 buf
->f_type
= REISERFS_SUPER_MAGIC
;
1913 buf
->f_fsid
.val
[0] = (u32
)crc32_le(0, rs
->s_uuid
, sizeof(rs
->s_uuid
)/2);
1914 buf
->f_fsid
.val
[1] = (u32
)crc32_le(0, rs
->s_uuid
+ sizeof(rs
->s_uuid
)/2,
1915 sizeof(rs
->s_uuid
)/2);
1921 static int reiserfs_write_dquot(struct dquot
*dquot
)
1923 struct reiserfs_transaction_handle th
;
1926 reiserfs_write_lock(dquot
->dq_sb
);
1928 journal_begin(&th
, dquot
->dq_sb
,
1929 REISERFS_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
1932 ret
= dquot_commit(dquot
);
1934 journal_end(&th
, dquot
->dq_sb
,
1935 REISERFS_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
1939 reiserfs_write_unlock(dquot
->dq_sb
);
1943 static int reiserfs_acquire_dquot(struct dquot
*dquot
)
1945 struct reiserfs_transaction_handle th
;
1948 reiserfs_write_lock(dquot
->dq_sb
);
1950 journal_begin(&th
, dquot
->dq_sb
,
1951 REISERFS_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
1954 ret
= dquot_acquire(dquot
);
1956 journal_end(&th
, dquot
->dq_sb
,
1957 REISERFS_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
1961 reiserfs_write_unlock(dquot
->dq_sb
);
1965 static int reiserfs_release_dquot(struct dquot
*dquot
)
1967 struct reiserfs_transaction_handle th
;
1970 reiserfs_write_lock(dquot
->dq_sb
);
1972 journal_begin(&th
, dquot
->dq_sb
,
1973 REISERFS_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
1975 /* Release dquot anyway to avoid endless cycle in dqput() */
1976 dquot_release(dquot
);
1979 ret
= dquot_release(dquot
);
1981 journal_end(&th
, dquot
->dq_sb
,
1982 REISERFS_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
1986 reiserfs_write_unlock(dquot
->dq_sb
);
1990 static int reiserfs_mark_dquot_dirty(struct dquot
*dquot
)
1992 /* Are we journaling quotas? */
1993 if (REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
1994 REISERFS_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
1995 dquot_mark_dquot_dirty(dquot
);
1996 return reiserfs_write_dquot(dquot
);
1998 return dquot_mark_dquot_dirty(dquot
);
2001 static int reiserfs_write_info(struct super_block
*sb
, int type
)
2003 struct reiserfs_transaction_handle th
;
2006 /* Data block + inode block */
2007 reiserfs_write_lock(sb
);
2008 ret
= journal_begin(&th
, sb
, 2);
2011 ret
= dquot_commit_info(sb
, type
);
2012 err
= journal_end(&th
, sb
, 2);
2016 reiserfs_write_unlock(sb
);
2021 * Turn on quotas during mount time - we need to find the quota file and such...
2023 static int reiserfs_quota_on_mount(struct super_block
*sb
, int type
)
2025 return vfs_quota_on_mount(sb
, REISERFS_SB(sb
)->s_qf_names
[type
],
2026 REISERFS_SB(sb
)->s_jquota_fmt
, type
);
2030 * Standard function to be called on quota_on
2032 static int reiserfs_quota_on(struct super_block
*sb
, int type
, int format_id
,
2033 char *name
, int remount
)
2037 struct inode
*inode
;
2038 struct reiserfs_transaction_handle th
;
2040 if (!(REISERFS_SB(sb
)->s_mount_opt
& (1 << REISERFS_QUOTA
)))
2042 /* No more checks needed? Path and format_id are bogus anyway... */
2044 return vfs_quota_on(sb
, type
, format_id
, name
, 1);
2045 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2048 /* Quotafile not on the same filesystem? */
2049 if (path
.mnt
->mnt_sb
!= sb
) {
2053 inode
= path
.dentry
->d_inode
;
2054 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2055 if (!(REISERFS_I(inode
)->i_flags
& i_nopack_mask
)) {
2056 err
= reiserfs_unpack(inode
, NULL
);
2058 reiserfs_warning(sb
, "super-6520",
2059 "Unpacking tail of quota file failed"
2060 " (%d). Cannot turn on quotas.", err
);
2064 mark_inode_dirty(inode
);
2066 /* Journaling quota? */
2067 if (REISERFS_SB(sb
)->s_qf_names
[type
]) {
2068 /* Quotafile not of fs root? */
2069 if (path
.dentry
->d_parent
!= sb
->s_root
)
2070 reiserfs_warning(sb
, "super-6521",
2071 "Quota file not on filesystem root. "
2072 "Journalled quota will not work.");
2076 * When we journal data on quota file, we have to flush journal to see
2077 * all updates to the file when we bypass pagecache...
2079 if (reiserfs_file_data_log(inode
)) {
2080 /* Just start temporary transaction and finish it */
2081 err
= journal_begin(&th
, sb
, 1);
2084 err
= journal_end_sync(&th
, sb
, 1);
2088 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2094 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2095 * acquiring the locks... As quota files are never truncated and quota code
2096 * itself serializes the operations (and noone else should touch the files)
2097 * we don't have to be afraid of races */
2098 static ssize_t
reiserfs_quota_read(struct super_block
*sb
, int type
, char *data
,
2099 size_t len
, loff_t off
)
2101 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2102 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2103 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2105 struct buffer_head tmp_bh
, *bh
;
2106 loff_t i_size
= i_size_read(inode
);
2110 if (off
+ len
> i_size
)
2113 while (toread
> 0) {
2115 sb
->s_blocksize
- offset
<
2116 toread
? sb
->s_blocksize
- offset
: toread
;
2118 /* Quota files are without tails so we can safely use this function */
2119 reiserfs_write_lock(sb
);
2120 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, 0);
2121 reiserfs_write_unlock(sb
);
2124 if (!buffer_mapped(&tmp_bh
)) /* A hole? */
2125 memset(data
, 0, tocopy
);
2127 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2130 memcpy(data
, bh
->b_data
+ offset
, tocopy
);
2141 /* Write to quotafile (we know the transaction is already started and has
2142 * enough credits) */
2143 static ssize_t
reiserfs_quota_write(struct super_block
*sb
, int type
,
2144 const char *data
, size_t len
, loff_t off
)
2146 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2147 unsigned long blk
= off
>> sb
->s_blocksize_bits
;
2148 int err
= 0, offset
= off
& (sb
->s_blocksize
- 1), tocopy
;
2149 int journal_quota
= REISERFS_SB(sb
)->s_qf_names
[type
] != NULL
;
2150 size_t towrite
= len
;
2151 struct buffer_head tmp_bh
, *bh
;
2153 if (!current
->journal_info
) {
2154 printk(KERN_WARNING
"reiserfs: Quota write (off=%Lu, len=%Lu)"
2155 " cancelled because transaction is not started.\n",
2156 (unsigned long long)off
, (unsigned long long)len
);
2159 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2160 while (towrite
> 0) {
2161 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2162 sb
->s_blocksize
- offset
: towrite
;
2164 err
= reiserfs_get_block(inode
, blk
, &tmp_bh
, GET_BLOCK_CREATE
);
2167 if (offset
|| tocopy
!= sb
->s_blocksize
)
2168 bh
= sb_bread(sb
, tmp_bh
.b_blocknr
);
2170 bh
= sb_getblk(sb
, tmp_bh
.b_blocknr
);
2176 memcpy(bh
->b_data
+ offset
, data
, tocopy
);
2177 flush_dcache_page(bh
->b_page
);
2178 set_buffer_uptodate(bh
);
2180 reiserfs_prepare_for_journal(sb
, bh
, 1);
2181 journal_mark_dirty(current
->journal_info
, sb
, bh
);
2183 reiserfs_add_ordered_list(inode
, bh
);
2191 if (len
== towrite
) {
2192 mutex_unlock(&inode
->i_mutex
);
2195 if (inode
->i_size
< off
+ len
- towrite
)
2196 i_size_write(inode
, off
+ len
- towrite
);
2198 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2199 mark_inode_dirty(inode
);
2200 mutex_unlock(&inode
->i_mutex
);
2201 return len
- towrite
;
2206 static int get_super_block(struct file_system_type
*fs_type
,
2207 int flags
, const char *dev_name
,
2208 void *data
, struct vfsmount
*mnt
)
2210 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, reiserfs_fill_super
,
2214 static int __init
init_reiserfs_fs(void)
2218 if ((ret
= init_inodecache())) {
2222 reiserfs_proc_info_global_init();
2224 ret
= register_filesystem(&reiserfs_fs_type
);
2230 reiserfs_proc_info_global_done();
2231 destroy_inodecache();
2236 static void __exit
exit_reiserfs_fs(void)
2238 reiserfs_proc_info_global_done();
2239 unregister_filesystem(&reiserfs_fs_type
);
2240 destroy_inodecache();
2243 struct file_system_type reiserfs_fs_type
= {
2244 .owner
= THIS_MODULE
,
2246 .get_sb
= get_super_block
,
2247 .kill_sb
= reiserfs_kill_sb
,
2248 .fs_flags
= FS_REQUIRES_DEV
,
2251 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2252 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2253 MODULE_LICENSE("GPL");
2255 module_init(init_reiserfs_fs
);
2256 module_exit(exit_reiserfs_fs
);