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/config.h>
15 #include <linux/module.h>
16 #include <linux/vmalloc.h>
17 #include <linux/time.h>
18 #include <asm/uaccess.h>
19 #include <linux/reiserfs_fs.h>
20 #include <linux/reiserfs_acl.h>
21 #include <linux/reiserfs_xattr.h>
22 #include <linux/smp_lock.h>
23 #include <linux/init.h>
24 #include <linux/blkdev.h>
25 #include <linux/buffer_head.h>
26 #include <linux/vfs.h>
27 #include <linux/namespace.h>
28 #include <linux/mount.h>
29 #include <linux/namei.h>
30 #include <linux/quotaops.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 super_block *s, struct kstatfs *buf);
65 static int reiserfs_sync_fs(struct super_block *s, int wait)
67 if (!(s->s_flags & MS_RDONLY)) {
68 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);
82 static void reiserfs_write_super(struct super_block *s)
84 reiserfs_sync_fs(s, 1);
87 static void reiserfs_write_super_lockfs(struct super_block *s)
89 struct reiserfs_transaction_handle th;
90 reiserfs_write_lock(s);
91 if (!(s->s_flags & MS_RDONLY)) {
92 int err = journal_begin(&th, s, 1);
94 reiserfs_block_writes(&th);
96 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
98 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
99 reiserfs_block_writes(&th);
100 journal_end_sync(&th, s, 1);
104 reiserfs_write_unlock(s);
107 static void reiserfs_unlockfs(struct super_block *s)
109 reiserfs_allow_writes(s);
112 extern const struct in_core_key MAX_IN_CORE_KEY;
114 /* this is used to delete "save link" when there are no items of a
115 file it points to. It can either happen if unlink is completed but
116 "save unlink" removal, or if file has both unlink and truncate
117 pending and as unlink completes first (because key of "save link"
118 protecting unlink is bigger that a key lf "save link" which
119 protects truncate), so there left no items to make truncate
121 static int remove_save_link_only(struct super_block *s,
122 struct reiserfs_key *key, int oid_free)
124 struct reiserfs_transaction_handle th;
127 /* we are going to do one balancing */
128 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
132 reiserfs_delete_solid_item(&th, NULL, key);
134 /* removals are protected by direct items */
135 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
137 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
141 static int reiserfs_quota_on_mount(struct super_block *, int);
144 /* look for uncompleted unlinks and truncates and complete them */
145 static int finish_unfinished(struct super_block *s)
147 INITIALIZE_PATH(path);
148 struct cpu_key max_cpu_key, obj_key;
149 struct reiserfs_key save_link_key;
151 struct item_head *ih;
152 struct buffer_head *bh;
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
171 /* Needed for iput() to work correctly and not trash data */
172 if (s->s_flags & MS_ACTIVE) {
176 s->s_flags |= MS_ACTIVE;
178 /* Turn on quotas so that they are updated correctly */
179 for (i = 0; i < MAXQUOTAS; i++) {
180 if (REISERFS_SB(s)->s_qf_names[i]) {
181 int ret = reiserfs_quota_on_mount(s, i);
184 "reiserfs: cannot turn on journalled quota: error %d",
191 REISERFS_SB(s)->s_is_unlinked_ok = 1;
193 retval = search_item(s, &max_cpu_key, &path);
194 if (retval != ITEM_NOT_FOUND) {
196 "vs-2140: finish_unfinished: search_by_key returned %d",
201 bh = get_last_bh(&path);
202 item_pos = get_item_pos(&path);
203 if (item_pos != B_NR_ITEMS(bh)) {
205 "vs-2060: finish_unfinished: 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 */
236 "vs-2180: finish_unfinished: iget failed for %K",
238 retval = remove_save_link_only(s, &save_link_key, 1);
242 if (!truncate && inode->i_nlink) {
243 /* file is not unlinked */
245 "vs-2185: finish_unfinished: file %K is not unlinked",
247 retval = remove_save_link_only(s, &save_link_key, 0);
252 if (truncate && S_ISDIR(inode->i_mode)) {
253 /* We got a truncate request for a dir which is impossible.
254 The only imaginable way is to execute unfinished truncate request
255 then boot into old kernel, remove the file and create dir with
258 "green-2101: impossible truncate on a 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 /* removal gets completed in iput */
290 REISERFS_SB(s)->s_is_unlinked_ok = 0;
293 /* Turn quotas off */
294 for (i = 0; i < MAXQUOTAS; i++) {
295 if (sb_dqopt(s)->files[i])
296 vfs_quota_off_mount(s, i);
299 /* Restore the flag back */
300 s->s_flags &= ~MS_ACTIVE;
304 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
305 "Completed\n", done);
309 /* to protect file being unlinked from getting lost we "safe" link files
310 being unlinked. This link will be deleted in the same transaction with last
311 item of file. mounting the filesytem we scan all these links and remove
312 files which almost got lost */
313 void add_save_link(struct reiserfs_transaction_handle *th,
314 struct inode *inode, int truncate)
316 INITIALIZE_PATH(path);
322 BUG_ON(!th->t_trans_id);
324 /* file can only get one "save link" of each kind */
326 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
327 "saved link already exists for truncated inode %lx",
330 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
331 "saved link already exists for unlinked inode %lx",
334 /* setup key of "save" link */
335 key.version = KEY_FORMAT_3_5;
336 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
337 key.on_disk_key.k_objectid = inode->i_ino;
339 /* unlink, rmdir, rename */
340 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
341 set_cpu_key_k_type(&key, TYPE_DIRECT);
343 /* item head of "safe" link */
344 make_le_item_head(&ih, &key, key.version,
345 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
346 4 /*length */ , 0xffff /*free space */ );
349 if (S_ISDIR(inode->i_mode))
350 reiserfs_warning(inode->i_sb,
351 "green-2102: Adding a truncate savelink for a directory %k! Please report",
353 set_cpu_key_k_offset(&key, 1);
354 set_cpu_key_k_type(&key, TYPE_INDIRECT);
356 /* item head of "safe" link */
357 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
358 4 /*length */ , 0 /*free space */ );
362 /* look for its place in the tree */
363 retval = search_item(inode->i_sb, &key, &path);
364 if (retval != ITEM_NOT_FOUND) {
365 if (retval != -ENOSPC)
366 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
367 "search_by_key (%K) returned %d", &key,
373 /* body of "save" link */
374 link = INODE_PKEY(inode)->k_dir_id;
376 /* put "save" link inot tree, don't charge quota to anyone */
378 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
380 if (retval != -ENOSPC)
381 reiserfs_warning(inode->i_sb,
382 "vs-2120: add_save_link: insert_item returned %d",
386 REISERFS_I(inode)->i_flags |=
387 i_link_saved_truncate_mask;
389 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
393 /* this opens transaction unlike add_save_link */
394 int remove_save_link(struct inode *inode, int truncate)
396 struct reiserfs_transaction_handle th;
397 struct reiserfs_key key;
400 /* we are going to do one balancing only */
401 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
405 /* setup key of "save" link */
406 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
407 key.k_objectid = INODE_PKEY(inode)->k_objectid;
409 /* unlink, rmdir, rename */
410 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
411 1 + inode->i_sb->s_blocksize);
412 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
415 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
416 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
420 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
422 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
423 /* don't take quota bytes from anywhere */
424 reiserfs_delete_solid_item(&th, NULL, &key);
426 reiserfs_release_objectid(&th, inode->i_ino);
427 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
429 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
431 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
434 static void reiserfs_put_super(struct super_block *s)
437 struct reiserfs_transaction_handle th;
440 if (REISERFS_SB(s)->xattr_root) {
441 d_invalidate(REISERFS_SB(s)->xattr_root);
442 dput(REISERFS_SB(s)->xattr_root);
445 if (REISERFS_SB(s)->priv_root) {
446 d_invalidate(REISERFS_SB(s)->priv_root);
447 dput(REISERFS_SB(s)->priv_root);
450 /* change file system state to current state if it was mounted with read-write permissions */
451 if (!(s->s_flags & MS_RDONLY)) {
452 if (!journal_begin(&th, s, 10)) {
453 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
455 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
456 REISERFS_SB(s)->s_mount_state);
457 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
461 /* note, journal_release checks for readonly mount, and can decide not
462 ** to do a journal_end
464 journal_release(&th, s);
466 for (i = 0; i < SB_BMAP_NR(s); i++)
467 brelse(SB_AP_BITMAP(s)[i].bh);
469 vfree(SB_AP_BITMAP(s));
471 brelse(SB_BUFFER_WITH_SB(s));
475 if (REISERFS_SB(s)->reserved_blocks != 0) {
477 "green-2005: reiserfs_put_super: reserved blocks left %d",
478 REISERFS_SB(s)->reserved_blocks);
481 reiserfs_proc_info_done(s);
489 static kmem_cache_t *reiserfs_inode_cachep;
491 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
493 struct reiserfs_inode_info *ei;
494 ei = (struct reiserfs_inode_info *)
495 kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
498 return &ei->vfs_inode;
501 static void reiserfs_destroy_inode(struct inode *inode)
503 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
506 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
508 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
510 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
511 SLAB_CTOR_CONSTRUCTOR) {
512 INIT_LIST_HEAD(&ei->i_prealloc_list);
513 inode_init_once(&ei->vfs_inode);
514 ei->i_acl_access = NULL;
515 ei->i_acl_default = NULL;
519 static int init_inodecache(void)
521 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
523 reiserfs_inode_info),
524 0, (SLAB_RECLAIM_ACCOUNT|
527 if (reiserfs_inode_cachep == NULL)
532 static void destroy_inodecache(void)
534 if (kmem_cache_destroy(reiserfs_inode_cachep))
535 reiserfs_warning(NULL,
536 "reiserfs_inode_cache: not all structures were freed");
539 /* we don't mark inodes dirty, we just log them */
540 static void reiserfs_dirty_inode(struct inode *inode)
542 struct reiserfs_transaction_handle th;
545 if (inode->i_sb->s_flags & MS_RDONLY) {
546 reiserfs_warning(inode->i_sb,
547 "clm-6006: writing inode %lu on readonly FS",
551 reiserfs_write_lock(inode->i_sb);
553 /* this is really only used for atime updates, so they don't have
554 ** to be included in O_SYNC or fsync
556 err = journal_begin(&th, inode->i_sb, 1);
558 reiserfs_write_unlock(inode->i_sb);
561 reiserfs_update_sd(&th, inode);
562 journal_end(&th, inode->i_sb, 1);
563 reiserfs_write_unlock(inode->i_sb);
566 static void reiserfs_clear_inode(struct inode *inode)
568 struct posix_acl *acl;
570 acl = REISERFS_I(inode)->i_acl_access;
571 if (acl && !IS_ERR(acl))
572 posix_acl_release(acl);
573 REISERFS_I(inode)->i_acl_access = NULL;
575 acl = REISERFS_I(inode)->i_acl_default;
576 if (acl && !IS_ERR(acl))
577 posix_acl_release(acl);
578 REISERFS_I(inode)->i_acl_default = NULL;
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 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 .clear_inode = reiserfs_clear_inode,
595 .put_super = reiserfs_put_super,
596 .write_super = reiserfs_write_super,
597 .sync_fs = reiserfs_sync_fs,
598 .write_super_lockfs = reiserfs_write_super_lockfs,
599 .unlockfs = reiserfs_unlockfs,
600 .statfs = reiserfs_statfs,
601 .remount_fs = reiserfs_remount,
603 .quota_read = reiserfs_quota_read,
604 .quota_write = reiserfs_quota_write,
609 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
611 static int reiserfs_dquot_initialize(struct inode *, int);
612 static int reiserfs_dquot_drop(struct inode *);
613 static int reiserfs_write_dquot(struct dquot *);
614 static int reiserfs_acquire_dquot(struct dquot *);
615 static int reiserfs_release_dquot(struct dquot *);
616 static int reiserfs_mark_dquot_dirty(struct dquot *);
617 static int reiserfs_write_info(struct super_block *, int);
618 static int reiserfs_quota_on(struct super_block *, int, int, char *);
620 static struct dquot_operations reiserfs_quota_operations = {
621 .initialize = reiserfs_dquot_initialize,
622 .drop = reiserfs_dquot_drop,
623 .alloc_space = dquot_alloc_space,
624 .alloc_inode = dquot_alloc_inode,
625 .free_space = dquot_free_space,
626 .free_inode = dquot_free_inode,
627 .transfer = dquot_transfer,
628 .write_dquot = reiserfs_write_dquot,
629 .acquire_dquot = reiserfs_acquire_dquot,
630 .release_dquot = reiserfs_release_dquot,
631 .mark_dirty = reiserfs_mark_dquot_dirty,
632 .write_info = reiserfs_write_info,
635 static struct quotactl_ops reiserfs_qctl_operations = {
636 .quota_on = reiserfs_quota_on,
637 .quota_off = vfs_quota_off,
638 .quota_sync = vfs_quota_sync,
639 .get_info = vfs_get_dqinfo,
640 .set_info = vfs_set_dqinfo,
641 .get_dqblk = vfs_get_dqblk,
642 .set_dqblk = vfs_set_dqblk,
646 static struct export_operations reiserfs_export_ops = {
647 .encode_fh = reiserfs_encode_fh,
648 .decode_fh = reiserfs_decode_fh,
649 .get_parent = reiserfs_get_parent,
650 .get_dentry = reiserfs_get_dentry,
653 /* this struct is used in reiserfs_getopt () for containing the value for those
654 mount options that have values rather than being toggles. */
657 int setmask; /* bitmask which is to set on mount_options bitmask when this
658 value is found, 0 is no bits are to be changed. */
659 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
660 value is found, 0 is no bits are to be changed. This is
661 applied BEFORE setmask */
664 /* Set this bit in arg_required to allow empty arguments */
665 #define REISERFS_OPT_ALLOWEMPTY 31
667 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
671 int arg_required; /* 0 if argument is not required, not 0 otherwise */
672 const arg_desc_t *values; /* list of values accepted by an option */
673 int setmask; /* bitmask which is to set on mount_options bitmask when this
674 value is found, 0 is no bits are to be changed. */
675 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
676 value is found, 0 is no bits are to be changed. This is
677 applied BEFORE setmask */
680 /* possible values for -o data= */
681 static const arg_desc_t logging_mode[] = {
682 {"ordered", 1 << REISERFS_DATA_ORDERED,
683 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
684 {"journal", 1 << REISERFS_DATA_LOG,
685 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
686 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
687 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
691 /* possible values for -o barrier= */
692 static const arg_desc_t barrier_mode[] = {
693 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
694 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
698 /* possible values for "-o block-allocator=" and bits which are to be set in
699 s_mount_opt of reiserfs specific part of in-core super block */
700 static const arg_desc_t balloc[] = {
701 {"noborder", 1 << REISERFS_NO_BORDER, 0},
702 {"border", 0, 1 << REISERFS_NO_BORDER},
703 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
704 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
705 {"test4", 1 << REISERFS_TEST4, 0},
706 {"notest4", 0, 1 << REISERFS_TEST4},
710 static const arg_desc_t tails[] = {
711 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
712 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
713 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
717 static const arg_desc_t error_actions[] = {
718 {"panic", 1 << REISERFS_ERROR_PANIC,
719 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
720 {"ro-remount", 1 << REISERFS_ERROR_RO,
721 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
722 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
723 {"continue", 1 << REISERFS_ERROR_CONTINUE,
724 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
729 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
730 There might be broken applications that are
731 confused by this. Use nolargeio mount option
732 to get usual i/o size = PAGE_SIZE.
735 /* proceed only one option from a list *cur - string containing of mount options
736 opts - array of options which are accepted
737 opt_arg - if option is found and requires an argument and if it is specifed
738 in the input - pointer to the argument is stored here
739 bit_flags - if option requires to set a certain bit - it is set here
740 return -1 if unknown option is found, opt->arg_required otherwise */
741 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
742 char **opt_arg, unsigned long *bit_flags)
751 const opt_desc_t *opt;
752 const arg_desc_t *arg;
756 /* assume argument cannot contain commas */
757 *cur = strchr(p, ',');
763 if (!strncmp(p, "alloc=", 6)) {
764 /* Ugly special case, probably we should redo options parser so that
765 it can understand several arguments for some options, also so that
766 it can fill several bitfields with option values. */
767 if (reiserfs_parse_alloc_options(s, p + 6)) {
774 /* for every option in the list */
775 for (opt = opts; opt->option_name; opt++) {
776 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
779 (1 << REISERFS_UNSUPPORTED_OPT))
780 reiserfs_warning(s, "%s not supported.",
783 *bit_flags &= ~opt->clrmask;
785 (1 << REISERFS_UNSUPPORTED_OPT))
786 reiserfs_warning(s, "%s not supported.",
789 *bit_flags |= opt->setmask;
794 if (!opt->option_name) {
795 reiserfs_warning(s, "unknown mount option \"%s\"", p);
799 p += strlen(opt->option_name);
802 if (!opt->arg_required) {
804 "the option \"%s\" does not require an argument",
811 if (opt->arg_required) {
813 "the option \"%s\" requires an argument",
819 reiserfs_warning(s, "head of option \"%s\" is only correct",
824 /* move to the argument, or to next option if argument is not required */
827 if (opt->arg_required
828 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
830 /* this catches "option=," if not allowed */
831 reiserfs_warning(s, "empty argument for \"%s\"",
837 /* *=NULLopt_arg contains pointer to argument */
839 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
842 /* values possible for this option are listed in opt->values */
843 for (arg = opt->values; arg->value; arg++) {
844 if (!strcmp(p, arg->value)) {
846 *bit_flags &= ~arg->clrmask;
847 *bit_flags |= arg->setmask;
849 return opt->arg_required;
853 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
858 /* returns 0 if something is wrong in option string, 1 - otherwise */
859 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
860 unsigned long *mount_options,
861 /* after the parsing phase, contains the
862 collection of bitflags defining what
863 mount options were selected. */
864 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
866 unsigned int *commit_max_age)
871 opt_desc_t opts[] = {
872 /* Compatibility stuff, so that -o notail for old setups still work */
873 {"tails",.arg_required = 't',.values = tails},
875 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
876 {"conv",.setmask = 1 << REISERFS_CONVERT},
877 {"attrs",.setmask = 1 << REISERFS_ATTRS},
878 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
879 #ifdef CONFIG_REISERFS_FS_XATTR
880 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
881 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
883 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
884 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
886 #ifndef CONFIG_INOXID_NONE
887 {"tagxid",.setmask = 1 << REISERFS_TAGXID},
889 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
890 {"acl",.setmask = 1 << REISERFS_POSIXACL},
891 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
893 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
894 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
896 {.option_name = "nolog"},
897 {"replayonly",.setmask = 1 << REPLAYONLY},
898 {"block-allocator",.arg_required = 'a',.values = balloc},
899 {"data",.arg_required = 'd',.values = logging_mode},
900 {"barrier",.arg_required = 'b',.values = barrier_mode},
901 {"resize",.arg_required = 'r',.values = NULL},
902 {"jdev",.arg_required = 'j',.values = NULL},
903 {"nolargeio",.arg_required = 'w',.values = NULL},
904 {"commit",.arg_required = 'c',.values = NULL},
905 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
906 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
907 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
908 {"errors",.arg_required = 'e',.values = error_actions},
909 {"usrjquota",.arg_required =
910 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
911 {"grpjquota",.arg_required =
912 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
913 {"jqfmt",.arg_required = 'f',.values = NULL},
914 {.option_name = NULL}
918 if (!options || !*options)
919 /* use default configuration: create tails, journaling on, no
920 conversion to newest format */
923 for (pos = options; pos;) {
924 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
926 /* wrong option is given */
933 /* "resize=NNN" or "resize=auto" */
935 if (!strcmp(arg, "auto")) {
936 /* From JFS code, to auto-get the size. */
938 s->s_bdev->bd_inode->i_size >> s->
941 *blocks = simple_strtoul(arg, &p, 0);
943 /* NNN does not look like a number */
945 "reiserfs_parse_options: bad value %s",
954 unsigned long val = simple_strtoul(arg, &p, 0);
955 /* commit=NNN (time in seconds) */
956 if (*p != '\0' || val >= (unsigned int)-1) {
958 "reiserfs_parse_options: bad value %s",
962 *commit_max_age = (unsigned int)val;
967 int val = simple_strtoul(arg, &p, 0);
971 "reiserfs_parse_options: non-numeric value %s for nolargeio option",
976 reiserfs_default_io_size = PAGE_SIZE;
978 reiserfs_default_io_size = 128 * 1024;
982 if (arg && *arg && jdev_name) {
983 if (*jdev_name) { //Hm, already assigned?
985 "reiserfs_parse_options: journal device was already specified to be %s",
993 if (c == 'u' || c == 'g') {
994 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
996 if (sb_any_quota_enabled(s)) {
998 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
1001 if (*arg) { /* Some filename specified? */
1002 if (REISERFS_SB(s)->s_qf_names[qtype]
1003 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1006 "reiserfs_parse_options: %s quota file already specified.",
1010 if (strchr(arg, '/')) {
1012 "reiserfs_parse_options: quotafile must be on filesystem root.");
1015 REISERFS_SB(s)->s_qf_names[qtype] =
1016 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1017 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1019 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1022 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1023 *mount_options |= 1 << REISERFS_QUOTA;
1025 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1026 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1030 if (!strcmp(arg, "vfsold"))
1031 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1032 else if (!strcmp(arg, "vfsv0"))
1033 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1036 "reiserfs_parse_options: unknown quota format specified.");
1041 if (c == 'u' || c == 'g' || c == 'f') {
1043 "reiserfs_parse_options: journalled quota options not supported.");
1050 if (!REISERFS_SB(s)->s_jquota_fmt
1051 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1052 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1054 "reiserfs_parse_options: journalled quota format not specified.");
1057 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1058 if (!(*mount_options & (1 << REISERFS_QUOTA))
1059 && sb_any_quota_enabled(s)) {
1061 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1069 static void switch_data_mode(struct super_block *s, unsigned long mode)
1071 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1072 (1 << REISERFS_DATA_ORDERED) |
1073 (1 << REISERFS_DATA_WRITEBACK));
1074 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1077 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1079 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1080 if (!reiserfs_data_log(s)) {
1081 switch_data_mode(s, REISERFS_DATA_LOG);
1082 reiserfs_info(s, "switching to journaled data mode\n");
1084 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1085 if (!reiserfs_data_ordered(s)) {
1086 switch_data_mode(s, REISERFS_DATA_ORDERED);
1087 reiserfs_info(s, "switching to ordered data mode\n");
1089 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1090 if (!reiserfs_data_writeback(s)) {
1091 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1092 reiserfs_info(s, "switching to writeback data mode\n");
1097 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1099 int flush = (1 << REISERFS_BARRIER_FLUSH);
1100 int none = (1 << REISERFS_BARRIER_NONE);
1101 int all_barrier = flush | none;
1103 if (bits & all_barrier) {
1104 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1106 REISERFS_SB(s)->s_mount_opt |= flush;
1107 printk("reiserfs: enabling write barrier flush mode\n");
1108 } else if (bits & none) {
1109 REISERFS_SB(s)->s_mount_opt |= none;
1110 printk("reiserfs: write barriers turned off\n");
1115 static void handle_attrs(struct super_block *s)
1117 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1119 if (reiserfs_attrs(s)) {
1120 if (old_format_only(s)) {
1122 "reiserfs: cannot support attributes on 3.5.x disk format");
1123 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1126 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1128 "reiserfs: cannot support attributes until flag is set in super-block");
1129 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1134 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1136 struct reiserfs_super_block *rs;
1137 struct reiserfs_transaction_handle th;
1138 unsigned long blocks;
1139 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1140 unsigned long safe_mask = 0;
1141 unsigned int commit_max_age = (unsigned int)-1;
1142 struct reiserfs_journal *journal = SB_JOURNAL(s);
1148 rs = SB_DISK_SUPER_BLOCK(s);
1150 if (!reiserfs_parse_options
1151 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1153 for (i = 0; i < MAXQUOTAS; i++) {
1154 kfree(REISERFS_SB(s)->s_qf_names[i]);
1155 REISERFS_SB(s)->s_qf_names[i] = NULL;
1161 if ((mount_options & (1 << REISERFS_TAGXID)) &&
1162 !(s->s_flags & MS_TAGXID)) {
1163 reiserfs_warning(s, "reiserfs: tagxid not permitted on remount.");
1169 /* Add options that are safe here */
1170 safe_mask |= 1 << REISERFS_SMALLTAIL;
1171 safe_mask |= 1 << REISERFS_LARGETAIL;
1172 safe_mask |= 1 << REISERFS_NO_BORDER;
1173 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1174 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1175 safe_mask |= 1 << REISERFS_TEST4;
1176 safe_mask |= 1 << REISERFS_ATTRS;
1177 safe_mask |= 1 << REISERFS_XATTRS_USER;
1178 safe_mask |= 1 << REISERFS_POSIXACL;
1179 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1180 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1181 safe_mask |= 1 << REISERFS_ERROR_RO;
1182 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1183 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1184 safe_mask |= 1 << REISERFS_QUOTA;
1186 /* Update the bitmask, taking care to keep
1187 * the bits we're not allowed to change here */
1188 REISERFS_SB(s)->s_mount_opt =
1190 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1192 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1193 journal->j_max_commit_age = commit_max_age;
1194 journal->j_max_trans_age = commit_max_age;
1195 } else if (commit_max_age == 0) {
1196 /* 0 means restore defaults. */
1197 journal->j_max_commit_age = journal->j_default_max_commit_age;
1198 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1202 int rc = reiserfs_resize(s, blocks);
1207 if (*mount_flags & MS_RDONLY) {
1208 reiserfs_xattr_init(s, *mount_flags);
1209 /* remount read-only */
1210 if (s->s_flags & MS_RDONLY)
1211 /* it is read-only already */
1213 /* try to remount file system with read-only permissions */
1214 if (sb_umount_state(rs) == REISERFS_VALID_FS
1215 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1219 err = journal_begin(&th, s, 10);
1223 /* Mounting a rw partition read-only. */
1224 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1225 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1226 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1228 /* remount read-write */
1229 if (!(s->s_flags & MS_RDONLY)) {
1230 reiserfs_xattr_init(s, *mount_flags);
1231 return 0; /* We are read-write already */
1234 if (reiserfs_is_journal_aborted(journal))
1235 return journal->j_errno;
1237 handle_data_mode(s, mount_options);
1238 handle_barrier_mode(s, mount_options);
1239 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1240 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1241 err = journal_begin(&th, s, 10);
1245 /* Mount a partition which is read-only, read-write */
1246 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1247 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1248 s->s_flags &= ~MS_RDONLY;
1249 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1250 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1251 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1252 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1254 /* this will force a full flush of all journal lists */
1255 SB_JOURNAL(s)->j_must_wait = 1;
1256 err = journal_end(&th, s, 10);
1261 if (!(*mount_flags & MS_RDONLY)) {
1262 finish_unfinished(s);
1263 reiserfs_xattr_init(s, *mount_flags);
1269 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1270 * @sb - superblock for this filesystem
1271 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1273 * This routine counts how many free bits there are, finding the first zero
1274 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1275 * a loop of find_first_zero_bit() calls. This implementation is similar to
1276 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1277 * Should only be called on fs mount, but should be fairly efficient anyways.
1279 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1280 * will * invariably occupt block 0 represented in the bitmap. The only
1281 * exception to this is when free_count also == 0, since there will be no
1282 * free blocks at all.
1285 static void load_bitmap_info_data(struct super_block *sb,
1286 struct reiserfs_bitmap_info *bi)
1288 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1290 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1292 /* No need to scan if all 0's or all 1's.
1293 * Since we're only counting 0's, we can simply ignore all 1's */
1295 if (bi->first_zero_hint == 0) {
1296 bi->first_zero_hint =
1297 ((char *)cur - bi->bh->b_data) << 3;
1299 bi->free_count += sizeof(unsigned long) * 8;
1300 } else if (*cur != ~0L) {
1302 for (b = 0; b < sizeof(unsigned long) * 8; b++) {
1303 if (!reiserfs_test_le_bit(b, cur)) {
1305 if (bi->first_zero_hint == 0)
1306 bi->first_zero_hint =
1308 bi->bh->b_data) << 3) + b;
1315 #ifdef CONFIG_REISERFS_CHECK
1316 // This outputs a lot of unneded info on big FSes
1317 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1318 // bi->bh->b_blocknr, bi->free_count);
1322 static int read_bitmaps(struct super_block *s)
1327 vmalloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1328 if (SB_AP_BITMAP(s) == 0)
1330 memset(SB_AP_BITMAP(s), 0,
1331 sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1332 for (i = 0, bmap_nr =
1333 REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1334 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1335 SB_AP_BITMAP(s)[i].bh = sb_getblk(s, bmap_nr);
1336 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1337 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1339 for (i = 0; i < SB_BMAP_NR(s); i++) {
1340 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1341 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1342 reiserfs_warning(s, "sh-2029: reiserfs read_bitmaps: "
1343 "bitmap block (#%lu) reading failed",
1344 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1345 for (i = 0; i < SB_BMAP_NR(s); i++)
1346 brelse(SB_AP_BITMAP(s)[i].bh);
1347 vfree(SB_AP_BITMAP(s));
1348 SB_AP_BITMAP(s) = NULL;
1351 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1356 static int read_old_bitmaps(struct super_block *s)
1359 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1360 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1362 /* read true bitmap */
1364 vmalloc(sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1365 if (SB_AP_BITMAP(s) == 0)
1368 memset(SB_AP_BITMAP(s), 0,
1369 sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1371 for (i = 0; i < sb_bmap_nr(rs); i++) {
1372 SB_AP_BITMAP(s)[i].bh = sb_bread(s, bmp1 + i);
1373 if (!SB_AP_BITMAP(s)[i].bh)
1375 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1381 static int read_super_block(struct super_block *s, int offset)
1383 struct buffer_head *bh;
1384 struct reiserfs_super_block *rs;
1387 bh = sb_bread(s, offset / s->s_blocksize);
1389 reiserfs_warning(s, "sh-2006: read_super_block: "
1390 "bread failed (dev %s, block %lu, size %lu)",
1391 reiserfs_bdevname(s), offset / s->s_blocksize,
1396 rs = (struct reiserfs_super_block *)bh->b_data;
1397 if (!is_any_reiserfs_magic_string(rs)) {
1402 // ok, reiserfs signature (old or new) found in at the given offset
1404 fs_blocksize = sb_blocksize(rs);
1406 sb_set_blocksize(s, fs_blocksize);
1408 bh = sb_bread(s, offset / s->s_blocksize);
1410 reiserfs_warning(s, "sh-2007: read_super_block: "
1411 "bread failed (dev %s, block %lu, size %lu)\n",
1412 reiserfs_bdevname(s), offset / s->s_blocksize,
1417 rs = (struct reiserfs_super_block *)bh->b_data;
1418 if (sb_blocksize(rs) != s->s_blocksize) {
1419 reiserfs_warning(s, "sh-2011: read_super_block: "
1420 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1421 reiserfs_bdevname(s),
1422 (unsigned long long)bh->b_blocknr,
1428 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1431 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1432 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1433 "get newer reiserfsprogs package");
1437 SB_BUFFER_WITH_SB(s) = bh;
1438 SB_DISK_SUPER_BLOCK(s) = rs;
1440 if (is_reiserfs_jr(rs)) {
1441 /* magic is of non-standard journal filesystem, look at s_version to
1442 find which format is in use */
1443 if (sb_version(rs) == REISERFS_VERSION_2)
1445 "read_super_block: found reiserfs format \"3.6\""
1446 " with non-standard journal");
1447 else if (sb_version(rs) == REISERFS_VERSION_1)
1449 "read_super_block: found reiserfs format \"3.5\""
1450 " with non-standard journal");
1453 "sh-2012: read_super_block: found unknown "
1454 "format \"%u\" of reiserfs with non-standard magic",
1459 /* s_version of standard format may contain incorrect information,
1460 so we just look at the magic string */
1462 "found reiserfs format \"%s\" with standard journal\n",
1463 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1465 s->s_op = &reiserfs_sops;
1466 s->s_export_op = &reiserfs_export_ops;
1468 s->s_qcop = &reiserfs_qctl_operations;
1469 s->dq_op = &reiserfs_quota_operations;
1472 /* new format is limited by the 32 bit wide i_blocks field, want to
1473 ** be one full block below that.
1475 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1479 /* after journal replay, reread all bitmap and super blocks */
1480 static int reread_meta_blocks(struct super_block *s)
1483 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1484 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1485 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1487 "reread_meta_blocks, error reading the super");
1491 for (i = 0; i < SB_BMAP_NR(s); i++) {
1492 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh));
1493 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1494 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1496 "reread_meta_blocks, error reading bitmap block number %d at %llu",
1498 (unsigned long long)SB_AP_BITMAP(s)[i].
1507 /////////////////////////////////////////////////////
1508 // hash detection stuff
1510 // if root directory is empty - we set default - Yura's - hash and
1512 // FIXME: we look for only one name in a directory. If tea and yura
1513 // bith have the same value - we ask user to send report to the
1515 static __u32 find_hash_out(struct super_block *s)
1518 struct inode *inode;
1520 INITIALIZE_PATH(path);
1521 struct reiserfs_dir_entry de;
1522 __u32 hash = DEFAULT_HASH;
1524 inode = s->s_root->d_inode;
1526 do { // Some serious "goto"-hater was there ;)
1527 u32 teahash, r5hash, yurahash;
1529 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1530 retval = search_by_entry_key(s, &key, &path, &de);
1531 if (retval == IO_ERROR) {
1535 if (retval == NAME_NOT_FOUND)
1537 set_de_name_and_namelen(&de);
1538 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1539 /* allow override in this case */
1540 if (reiserfs_rupasov_hash(s)) {
1543 reiserfs_warning(s, "FS seems to be empty, autodetect "
1544 "is using the default hash");
1547 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1548 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1549 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1550 if (((teahash == r5hash)
1552 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1553 == r5hash)) || ((teahash == yurahash)
1555 GET_HASH_VALUE(deh_offset
1560 || ((r5hash == yurahash)
1562 GET_HASH_VALUE(deh_offset
1563 (&(de.de_deh[de.de_entry_num])))))) {
1565 "Unable to automatically detect hash function. "
1566 "Please mount with -o hash={tea,rupasov,r5}",
1567 reiserfs_bdevname(s));
1571 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1574 else if (GET_HASH_VALUE
1575 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1577 else if (GET_HASH_VALUE
1578 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1581 reiserfs_warning(s, "Unrecognised hash function");
1590 // finds out which hash names are sorted with
1591 static int what_hash(struct super_block *s)
1595 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1597 /* reiserfs_hash_detect() == true if any of the hash mount options
1598 ** were used. We must check them to make sure the user isn't
1599 ** using a bad hash value
1601 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1602 code = find_hash_out(s);
1604 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1605 /* detection has found the hash, and we must check against the
1608 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1609 reiserfs_warning(s, "Error, %s hash detected, "
1610 "unable to force rupasov hash",
1611 reiserfs_hashname(code));
1613 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1614 reiserfs_warning(s, "Error, %s hash detected, "
1615 "unable to force tea hash",
1616 reiserfs_hashname(code));
1618 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1619 reiserfs_warning(s, "Error, %s hash detected, "
1620 "unable to force r5 hash",
1621 reiserfs_hashname(code));
1625 /* find_hash_out was not called or could not determine the hash */
1626 if (reiserfs_rupasov_hash(s)) {
1628 } else if (reiserfs_tea_hash(s)) {
1630 } else if (reiserfs_r5_hash(s)) {
1635 /* if we are mounted RW, and we have a new valid hash code, update
1638 if (code != UNSET_HASH &&
1639 !(s->s_flags & MS_RDONLY) &&
1640 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1641 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1646 // return pointer to appropriate function
1647 static hashf_t hash_function(struct super_block *s)
1649 switch (what_hash(s)) {
1651 reiserfs_info(s, "Using tea hash to sort names\n");
1654 reiserfs_info(s, "Using rupasov hash to sort names\n");
1657 reiserfs_info(s, "Using r5 hash to sort names\n");
1663 // this is used to set up correct value for old partitions
1664 static int function2code(hashf_t func)
1666 if (func == keyed_hash)
1668 if (func == yura_hash)
1670 if (func == r5_hash)
1673 BUG(); // should never happen
1678 #define SWARN(silent, s, ...) \
1680 reiserfs_warning (s, __VA_ARGS__)
1682 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1684 struct inode *root_inode;
1686 struct reiserfs_transaction_handle th;
1688 unsigned long blocks;
1689 unsigned int commit_max_age = 0;
1691 struct reiserfs_iget_args args;
1692 struct reiserfs_super_block *rs;
1694 struct reiserfs_sb_info *sbi;
1695 int errval = -EINVAL;
1697 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1703 memset(sbi, 0, sizeof(struct reiserfs_sb_info));
1704 /* Set default values for options: non-aggressive tails, RO on errors */
1705 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1706 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1707 /* no preallocation minimum, be smart in
1708 reiserfs_file_write instead */
1709 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1710 /* Preallocate by 16 blocks (17-1) at once */
1711 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1712 /* Initialize the rwsem for xattr dir */
1713 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1715 /* setup default block allocator options */
1716 reiserfs_init_alloc_options(s);
1719 if (reiserfs_parse_options
1720 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1721 &commit_max_age) == 0) {
1726 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1727 "for remount only");
1731 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1732 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1734 /* try new format (64-th 1k block), which can contain reiserfs super block */
1735 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1737 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1738 reiserfs_bdevname(s));
1742 /* map mount option tagxid */
1743 if (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TAGXID))
1744 s->s_flags |= MS_TAGXID;
1746 rs = SB_DISK_SUPER_BLOCK(s);
1747 /* Let's do basic sanity check to verify that underlying device is not
1748 smaller than the filesystem. If the check fails then abort and scream,
1749 because bad stuff will happen otherwise. */
1750 if (s->s_bdev && s->s_bdev->bd_inode
1751 && i_size_read(s->s_bdev->bd_inode) <
1752 sb_block_count(rs) * sb_blocksize(rs)) {
1754 "Filesystem on %s cannot be mounted because it is bigger than the device",
1755 reiserfs_bdevname(s));
1757 "You may need to run fsck or increase size of your LVM partition");
1759 "Or may be you forgot to reboot after fdisk when it told you to");
1763 sbi->s_mount_state = SB_REISERFS_STATE(s);
1764 sbi->s_mount_state = REISERFS_VALID_FS;
1766 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1768 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1771 #ifdef CONFIG_REISERFS_CHECK
1772 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1773 SWARN(silent, s, "- it is slow mode for debugging.");
1776 /* make data=ordered the default */
1777 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1778 !reiserfs_data_writeback(s)) {
1779 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1782 if (reiserfs_data_log(s)) {
1783 reiserfs_info(s, "using journaled data mode\n");
1784 } else if (reiserfs_data_ordered(s)) {
1785 reiserfs_info(s, "using ordered data mode\n");
1787 reiserfs_info(s, "using writeback data mode\n");
1789 if (reiserfs_barrier_flush(s)) {
1790 printk("reiserfs: using flush barriers\n");
1792 // set_device_ro(s->s_dev, 1) ;
1793 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1795 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1798 jinit_done = 1; /* once this is set, journal_release must be called
1799 ** if we error out of the mount
1802 if (reread_meta_blocks(s)) {
1804 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1811 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1813 "clm-7000: Detected readonly device, marking FS readonly");
1814 s->s_flags |= MS_RDONLY;
1816 args.objectid = REISERFS_ROOT_OBJECTID;
1817 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1819 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1820 reiserfs_init_locked_inode, (void *)(&args));
1823 "jmacd-10: reiserfs_fill_super: get root inode failed");
1827 if (root_inode->i_state & I_NEW) {
1828 reiserfs_read_locked_inode(root_inode, &args);
1829 unlock_new_inode(root_inode);
1832 s->s_root = d_alloc_root(root_inode);
1837 // define and initialize hash function
1838 sbi->s_hash_function = hash_function(s);
1839 if (sbi->s_hash_function == NULL) {
1845 if (is_reiserfs_3_5(rs)
1846 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1847 set_bit(REISERFS_3_5, &(sbi->s_properties));
1849 set_bit(REISERFS_3_6, &(sbi->s_properties));
1851 if (!(s->s_flags & MS_RDONLY)) {
1853 errval = journal_begin(&th, s, 1);
1859 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1861 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1862 set_sb_fs_state(rs, 0);
1864 if (old_format_only(s)) {
1865 /* filesystem of format 3.5 either with standard or non-standard
1867 if (convert_reiserfs(s)) {
1868 /* and -o conv is given */
1871 "converting 3.5 filesystem to the 3.6 format");
1873 if (is_reiserfs_3_5(rs))
1874 /* put magic string of 3.6 format. 2.2 will not be able to
1875 mount this filesystem anymore */
1876 memcpy(rs->s_v1.s_magic,
1877 reiserfs_3_6_magic_string,
1879 (reiserfs_3_6_magic_string));
1881 set_sb_version(rs, REISERFS_VERSION_2);
1882 reiserfs_convert_objectid_map_v1(s);
1883 set_bit(REISERFS_3_6, &(sbi->s_properties));
1884 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1885 } else if (!silent) {
1886 reiserfs_info(s, "using 3.5.x disk format\n");
1890 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1891 errval = journal_end(&th, s, 1);
1898 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1904 /* look for files which were to be removed in previous session */
1905 finish_unfinished(s);
1907 if (old_format_only(s) && !silent) {
1908 reiserfs_info(s, "using 3.5.x disk format\n");
1911 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1917 // mark hash in super block: it could be unset. overwrite should be ok
1918 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1922 reiserfs_proc_info_init(s);
1924 init_waitqueue_head(&(sbi->s_wait));
1925 spin_lock_init(&sbi->bitmap_lock);
1930 if (jinit_done) { /* kill the commit thread, free journal ram */
1931 journal_release_error(NULL, s);
1933 if (SB_DISK_SUPER_BLOCK(s)) {
1934 for (j = 0; j < SB_BMAP_NR(s); j++) {
1935 if (SB_AP_BITMAP(s))
1936 brelse(SB_AP_BITMAP(s)[j].bh);
1938 vfree(SB_AP_BITMAP(s));
1940 if (SB_BUFFER_WITH_SB(s))
1941 brelse(SB_BUFFER_WITH_SB(s));
1943 for (j = 0; j < MAXQUOTAS; j++) {
1944 kfree(sbi->s_qf_names[j]);
1945 sbi->s_qf_names[j] = NULL;
1950 s->s_fs_info = NULL;
1954 static int reiserfs_statfs(struct super_block *s, struct kstatfs *buf)
1956 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1958 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1959 buf->f_bfree = sb_free_blocks(rs);
1960 buf->f_bavail = buf->f_bfree;
1961 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1962 buf->f_bsize = s->s_blocksize;
1963 /* changed to accommodate gcc folks. */
1964 buf->f_type = REISERFS_SUPER_MAGIC;
1969 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1971 struct reiserfs_transaction_handle th;
1974 /* We may create quota structure so we need to reserve enough blocks */
1975 reiserfs_write_lock(inode->i_sb);
1977 journal_begin(&th, inode->i_sb,
1978 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1981 ret = dquot_initialize(inode, type);
1983 journal_end(&th, inode->i_sb,
1984 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1988 reiserfs_write_unlock(inode->i_sb);
1992 static int reiserfs_dquot_drop(struct inode *inode)
1994 struct reiserfs_transaction_handle th;
1997 /* We may delete quota structure so we need to reserve enough blocks */
1998 reiserfs_write_lock(inode->i_sb);
2000 journal_begin(&th, inode->i_sb,
2001 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
2004 ret = dquot_drop(inode);
2006 journal_end(&th, inode->i_sb,
2007 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
2011 reiserfs_write_unlock(inode->i_sb);
2015 static int reiserfs_write_dquot(struct dquot *dquot)
2017 struct reiserfs_transaction_handle th;
2020 reiserfs_write_lock(dquot->dq_sb);
2022 journal_begin(&th, dquot->dq_sb,
2023 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2026 ret = dquot_commit(dquot);
2028 journal_end(&th, dquot->dq_sb,
2029 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2033 reiserfs_write_unlock(dquot->dq_sb);
2037 static int reiserfs_acquire_dquot(struct dquot *dquot)
2039 struct reiserfs_transaction_handle th;
2042 reiserfs_write_lock(dquot->dq_sb);
2044 journal_begin(&th, dquot->dq_sb,
2045 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2048 ret = dquot_acquire(dquot);
2050 journal_end(&th, dquot->dq_sb,
2051 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2055 reiserfs_write_unlock(dquot->dq_sb);
2059 static int reiserfs_release_dquot(struct dquot *dquot)
2061 struct reiserfs_transaction_handle th;
2064 reiserfs_write_lock(dquot->dq_sb);
2066 journal_begin(&th, dquot->dq_sb,
2067 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2070 ret = dquot_release(dquot);
2072 journal_end(&th, dquot->dq_sb,
2073 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2077 reiserfs_write_unlock(dquot->dq_sb);
2081 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2083 /* Are we journalling quotas? */
2084 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2085 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2086 dquot_mark_dquot_dirty(dquot);
2087 return reiserfs_write_dquot(dquot);
2089 return dquot_mark_dquot_dirty(dquot);
2092 static int reiserfs_write_info(struct super_block *sb, int type)
2094 struct reiserfs_transaction_handle th;
2097 /* Data block + inode block */
2098 reiserfs_write_lock(sb);
2099 ret = journal_begin(&th, sb, 2);
2102 ret = dquot_commit_info(sb, type);
2103 err = journal_end(&th, sb, 2);
2107 reiserfs_write_unlock(sb);
2112 * Turn on quotas during mount time - we need to find the quota file and such...
2114 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2116 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2117 REISERFS_SB(sb)->s_jquota_fmt, type);
2121 * Standard function to be called on quota_on
2123 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2127 struct nameidata nd;
2129 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2131 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2134 /* Quotafile not on the same filesystem? */
2135 if (nd.mnt->mnt_sb != sb) {
2139 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2140 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2141 reiserfs_warning(sb,
2142 "reiserfs: Quota file must have tail packing disabled.");
2146 /* Not journalling quota? No more tests needed... */
2147 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2148 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2150 return vfs_quota_on(sb, type, format_id, path);
2152 /* Quotafile not of fs root? */
2153 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2154 reiserfs_warning(sb,
2155 "reiserfs: Quota file not on filesystem root. "
2156 "Journalled quota will not work.");
2158 return vfs_quota_on(sb, type, format_id, path);
2161 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2162 * acquiring the locks... As quota files are never truncated and quota code
2163 * itself serializes the operations (and noone else should touch the files)
2164 * we don't have to be afraid of races */
2165 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2166 size_t len, loff_t off)
2168 struct inode *inode = sb_dqopt(sb)->files[type];
2169 unsigned long blk = off >> sb->s_blocksize_bits;
2170 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2172 struct buffer_head tmp_bh, *bh;
2173 loff_t i_size = i_size_read(inode);
2177 if (off + len > i_size)
2180 while (toread > 0) {
2182 sb->s_blocksize - offset <
2183 toread ? sb->s_blocksize - offset : toread;
2185 /* Quota files are without tails so we can safely use this function */
2186 reiserfs_write_lock(sb);
2187 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2188 reiserfs_write_unlock(sb);
2191 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2192 memset(data, 0, tocopy);
2194 bh = sb_bread(sb, tmp_bh.b_blocknr);
2197 memcpy(data, bh->b_data + offset, tocopy);
2208 /* Write to quotafile (we know the transaction is already started and has
2209 * enough credits) */
2210 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2211 const char *data, size_t len, loff_t off)
2213 struct inode *inode = sb_dqopt(sb)->files[type];
2214 unsigned long blk = off >> sb->s_blocksize_bits;
2215 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2216 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2217 size_t towrite = len;
2218 struct buffer_head tmp_bh, *bh;
2220 mutex_lock(&inode->i_mutex);
2221 while (towrite > 0) {
2222 tocopy = sb->s_blocksize - offset < towrite ?
2223 sb->s_blocksize - offset : towrite;
2225 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2228 if (offset || tocopy != sb->s_blocksize)
2229 bh = sb_bread(sb, tmp_bh.b_blocknr);
2231 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2237 memcpy(bh->b_data + offset, data, tocopy);
2238 flush_dcache_page(bh->b_page);
2239 set_buffer_uptodate(bh);
2241 reiserfs_prepare_for_journal(sb, bh, 1);
2242 journal_mark_dirty(current->journal_info, sb, bh);
2244 reiserfs_add_ordered_list(inode, bh);
2254 if (inode->i_size < off + len - towrite)
2255 i_size_write(inode, off + len - towrite);
2257 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2258 mark_inode_dirty(inode);
2259 mutex_unlock(&inode->i_mutex);
2260 return len - towrite;
2265 static struct super_block *get_super_block(struct file_system_type *fs_type,
2266 int flags, const char *dev_name,
2269 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2272 static int __init init_reiserfs_fs(void)
2276 if ((ret = init_inodecache())) {
2280 if ((ret = reiserfs_xattr_register_handlers()))
2281 goto failed_reiserfs_xattr_register_handlers;
2283 reiserfs_proc_info_global_init();
2284 reiserfs_proc_register_global("version",
2285 reiserfs_global_version_in_proc);
2287 ret = register_filesystem(&reiserfs_fs_type);
2293 reiserfs_xattr_unregister_handlers();
2295 failed_reiserfs_xattr_register_handlers:
2296 reiserfs_proc_unregister_global("version");
2297 reiserfs_proc_info_global_done();
2298 destroy_inodecache();
2303 static void __exit exit_reiserfs_fs(void)
2305 reiserfs_xattr_unregister_handlers();
2306 reiserfs_proc_unregister_global("version");
2307 reiserfs_proc_info_global_done();
2308 unregister_filesystem(&reiserfs_fs_type);
2309 destroy_inodecache();
2312 struct file_system_type reiserfs_fs_type = {
2313 .owner = THIS_MODULE,
2315 .get_sb = get_super_block,
2316 .kill_sb = kill_block_super,
2317 .fs_flags = FS_REQUIRES_DEV,
2320 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2321 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2322 MODULE_LICENSE("GPL");
2324 module_init(init_reiserfs_fs);
2325 module_exit(exit_reiserfs_fs);