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));
45 int is_reiserfs_3_6 (struct reiserfs_super_block * rs)
47 return !strncmp (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
48 strlen (reiserfs_3_6_magic_string));
52 int is_reiserfs_jr (struct reiserfs_super_block * rs)
54 return !strncmp (rs->s_v1.s_magic, reiserfs_jr_magic_string,
55 strlen (reiserfs_jr_magic_string));
59 static int is_any_reiserfs_magic_string (struct reiserfs_super_block * rs)
61 return (is_reiserfs_3_5 (rs) || is_reiserfs_3_6 (rs) ||
65 static int reiserfs_remount (struct super_block * s, int * flags, char * data);
66 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf);
68 static int reiserfs_sync_fs (struct super_block * s, int wait)
70 if (!(s->s_flags & MS_RDONLY)) {
71 struct reiserfs_transaction_handle th;
72 reiserfs_write_lock(s);
73 if (!journal_begin(&th, s, 1))
74 if (!journal_end_sync(&th, s, 1))
75 reiserfs_flush_old_commits(s);
76 s->s_dirt = 0; /* Even if it's not true.
77 * We'll loop forever in sync_supers otherwise */
78 reiserfs_write_unlock(s);
85 static void reiserfs_write_super(struct super_block *s)
87 reiserfs_sync_fs(s, 1);
90 static void reiserfs_write_super_lockfs (struct super_block * s)
92 struct reiserfs_transaction_handle th ;
93 reiserfs_write_lock(s);
94 if (!(s->s_flags & MS_RDONLY)) {
95 int err = journal_begin(&th, s, 1) ;
97 reiserfs_block_writes(&th) ;
99 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
100 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
101 reiserfs_block_writes(&th) ;
102 journal_end_sync(&th, s, 1) ;
106 reiserfs_write_unlock(s);
109 static void reiserfs_unlockfs(struct super_block *s) {
110 reiserfs_allow_writes(s) ;
113 extern const struct in_core_key MAX_IN_CORE_KEY;
116 /* this is used to delete "save link" when there are no items of a
117 file it points to. It can either happen if unlink is completed but
118 "save unlink" removal, or if file has both unlink and truncate
119 pending and as unlink completes first (because key of "save link"
120 protecting unlink is bigger that a key lf "save link" which
121 protects truncate), so there left no items to make truncate
123 static int remove_save_link_only (struct super_block * s, struct reiserfs_key * key, int oid_free)
125 struct reiserfs_transaction_handle th;
128 /* we are going to do one balancing */
129 err = journal_begin (&th, s, JOURNAL_PER_BALANCE_CNT);
133 reiserfs_delete_solid_item (&th, NULL, key);
135 /* removals are protected by direct items */
136 reiserfs_release_objectid (&th, le32_to_cpu (key->k_objectid));
138 return journal_end (&th, s, JOURNAL_PER_BALANCE_CNT);
142 static int reiserfs_quota_on_mount(struct super_block *, int);
145 /* look for uncompleted unlinks and truncates and complete them */
146 static int finish_unfinished (struct super_block * s)
148 INITIALIZE_PATH (path);
149 struct cpu_key max_cpu_key, obj_key;
150 struct reiserfs_key save_link_key;
152 struct item_head * ih;
153 struct buffer_head * bh;
157 struct inode * inode;
165 /* compose key to look for "save" links */
166 max_cpu_key.version = KEY_FORMAT_3_5;
167 max_cpu_key.on_disk_key = MAX_IN_CORE_KEY;
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);
183 reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret);
189 REISERFS_SB(s)->s_is_unlinked_ok = 1;
191 retval = search_item (s, &max_cpu_key, &path);
192 if (retval != ITEM_NOT_FOUND) {
193 reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d",
198 bh = get_last_bh (&path);
199 item_pos = get_item_pos (&path);
200 if (item_pos != B_NR_ITEMS (bh)) {
201 reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found");
205 ih = B_N_PITEM_HEAD (bh, item_pos);
207 if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
208 /* there are no "save" links anymore */
211 save_link_key = ih->ih_key;
212 if (is_indirect_le_ih (ih))
217 /* reiserfs_iget needs k_dirid and k_objectid only */
218 item = B_I_PITEM (bh, ih);
219 obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__le32 *)item);
220 obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid);
221 obj_key.on_disk_key.k_offset = 0;
222 obj_key.on_disk_key.k_type = 0;
226 inode = reiserfs_iget (s, &obj_key);
228 /* the unlink almost completed, it just did not manage to remove
229 "save" link and release objectid */
230 reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K",
232 retval = remove_save_link_only (s, &save_link_key, 1);
236 if (!truncate && inode->i_nlink) {
237 /* file is not unlinked */
238 reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked",
240 retval = remove_save_link_only (s, &save_link_key, 0);
245 if (truncate && S_ISDIR (inode->i_mode) ) {
246 /* We got a truncate request for a dir which is impossible.
247 The only imaginable way is to execute unfinished truncate request
248 then boot into old kernel, remove the file and create dir with
250 reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode));
251 retval = remove_save_link_only (s, &save_link_key, 0);
258 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
259 /* not completed truncate found. New size was committed together
261 reiserfs_info (s, "Truncating %k to %Ld ..",
262 INODE_PKEY (inode), inode->i_size);
263 reiserfs_truncate_file (inode, 0/*don't update modification time*/);
264 retval = remove_save_link (inode, truncate);
266 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
267 /* not completed unlink (rmdir) found */
268 reiserfs_info (s, "Removing %k..", INODE_PKEY (inode));
269 /* removal gets completed in iput */
277 REISERFS_SB(s)->s_is_unlinked_ok = 0;
280 /* Turn quotas off */
281 for (i = 0; i < MAXQUOTAS; i++) {
282 if (sb_dqopt(s)->files[i])
283 vfs_quota_off_mount(s, i);
286 /* Restore the flag back */
287 s->s_flags &= ~MS_ACTIVE;
291 reiserfs_info (s, "There were %d uncompleted unlinks/truncates. "
292 "Completed\n", done);
296 /* to protect file being unlinked from getting lost we "safe" link files
297 being unlinked. This link will be deleted in the same transaction with last
298 item of file. mounting the filesytem we scan all these links and remove
299 files which almost got lost */
300 void add_save_link (struct reiserfs_transaction_handle * th,
301 struct inode * inode, int truncate)
303 INITIALIZE_PATH (path);
309 BUG_ON (!th->t_trans_id);
311 /* file can only get one "save link" of each kind */
313 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ),
314 "saved link already exists for truncated inode %lx",
315 ( long ) inode -> i_ino );
317 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ),
318 "saved link already exists for unlinked inode %lx",
319 ( long ) inode -> i_ino );
321 /* setup key of "save" link */
322 key.version = KEY_FORMAT_3_5;
323 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
324 key.on_disk_key.k_objectid = inode->i_ino;
326 /* unlink, rmdir, rename */
327 set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize);
328 set_cpu_key_k_type (&key, TYPE_DIRECT);
330 /* item head of "safe" link */
331 make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
332 4/*length*/, 0xffff/*free space*/);
335 if (S_ISDIR (inode->i_mode))
336 reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode));
337 set_cpu_key_k_offset (&key, 1);
338 set_cpu_key_k_type (&key, TYPE_INDIRECT);
340 /* item head of "safe" link */
341 make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT,
342 4/*length*/, 0/*free space*/);
346 /* look for its place in the tree */
347 retval = search_item (inode->i_sb, &key, &path);
348 if (retval != ITEM_NOT_FOUND) {
349 if ( retval != -ENOSPC )
350 reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:"
351 "search_by_key (%K) returned %d", &key, retval);
356 /* body of "save" link */
357 link = INODE_PKEY (inode)->k_dir_id;
359 /* put "save" link inot tree, don't charge quota to anyone */
360 retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link);
362 if (retval != -ENOSPC)
363 reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d",
367 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
369 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
374 /* this opens transaction unlike add_save_link */
375 int remove_save_link (struct inode * inode, int truncate)
377 struct reiserfs_transaction_handle th;
378 struct reiserfs_key key;
381 /* we are going to do one balancing only */
382 err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
386 /* setup key of "save" link */
387 key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID);
388 key.k_objectid = INODE_PKEY (inode)->k_objectid;
390 /* unlink, rmdir, rename */
391 set_le_key_k_offset (KEY_FORMAT_3_5, &key,
392 1 + inode->i_sb->s_blocksize);
393 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT);
396 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1);
397 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
401 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) ||
403 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) )
404 /* don't take quota bytes from anywhere */
405 reiserfs_delete_solid_item (&th, NULL, &key);
407 reiserfs_release_objectid (&th, inode->i_ino);
408 REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask;
410 REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask;
412 return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
416 static void reiserfs_put_super (struct super_block * s)
419 struct reiserfs_transaction_handle th ;
422 if (REISERFS_SB(s)->xattr_root) {
423 d_invalidate (REISERFS_SB(s)->xattr_root);
424 dput (REISERFS_SB(s)->xattr_root);
427 if (REISERFS_SB(s)->priv_root) {
428 d_invalidate (REISERFS_SB(s)->priv_root);
429 dput (REISERFS_SB(s)->priv_root);
432 /* change file system state to current state if it was mounted with read-write permissions */
433 if (!(s->s_flags & MS_RDONLY)) {
434 if (!journal_begin(&th, s, 10)) {
435 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
436 set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state );
437 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
441 /* note, journal_release checks for readonly mount, and can decide not
442 ** to do a journal_end
444 journal_release(&th, s) ;
446 for (i = 0; i < SB_BMAP_NR (s); i ++)
447 brelse (SB_AP_BITMAP (s)[i].bh);
449 vfree (SB_AP_BITMAP (s));
451 brelse (SB_BUFFER_WITH_SB (s));
453 print_statistics (s);
455 if (REISERFS_SB(s)->s_kmallocs != 0) {
456 reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d",
457 REISERFS_SB(s)->s_kmallocs);
460 if (REISERFS_SB(s)->reserved_blocks != 0) {
461 reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d",
462 REISERFS_SB(s)->reserved_blocks);
465 reiserfs_proc_info_done( s );
473 static kmem_cache_t * reiserfs_inode_cachep;
475 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
477 struct reiserfs_inode_info *ei;
478 ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
481 return &ei->vfs_inode;
484 static void reiserfs_destroy_inode(struct inode *inode)
486 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
489 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
491 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo;
493 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
494 SLAB_CTOR_CONSTRUCTOR) {
495 INIT_LIST_HEAD(&ei->i_prealloc_list) ;
496 inode_init_once(&ei->vfs_inode);
497 ei->i_acl_access = NULL;
498 ei->i_acl_default = NULL;
502 static int init_inodecache(void)
504 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
505 sizeof(struct reiserfs_inode_info),
506 0, SLAB_RECLAIM_ACCOUNT,
508 if (reiserfs_inode_cachep == NULL)
513 static void destroy_inodecache(void)
515 if (kmem_cache_destroy(reiserfs_inode_cachep))
516 reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed");
519 /* we don't mark inodes dirty, we just log them */
520 static void reiserfs_dirty_inode (struct inode * inode) {
521 struct reiserfs_transaction_handle th ;
524 if (inode->i_sb->s_flags & MS_RDONLY) {
525 reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS",
529 reiserfs_write_lock(inode->i_sb);
531 /* this is really only used for atime updates, so they don't have
532 ** to be included in O_SYNC or fsync
534 err = journal_begin(&th, inode->i_sb, 1) ;
536 reiserfs_write_unlock (inode->i_sb);
539 reiserfs_update_sd (&th, inode);
540 journal_end(&th, inode->i_sb, 1) ;
541 reiserfs_write_unlock(inode->i_sb);
544 static void reiserfs_clear_inode (struct inode *inode)
546 struct posix_acl *acl;
548 acl = REISERFS_I(inode)->i_acl_access;
549 if (acl && !IS_ERR (acl))
550 posix_acl_release (acl);
551 REISERFS_I(inode)->i_acl_access = NULL;
553 acl = REISERFS_I(inode)->i_acl_default;
554 if (acl && !IS_ERR (acl))
555 posix_acl_release (acl);
556 REISERFS_I(inode)->i_acl_default = NULL;
560 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
561 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t);
564 static struct super_operations reiserfs_sops =
566 .alloc_inode = reiserfs_alloc_inode,
567 .destroy_inode = reiserfs_destroy_inode,
568 .write_inode = reiserfs_write_inode,
569 .dirty_inode = reiserfs_dirty_inode,
570 .delete_inode = reiserfs_delete_inode,
571 .clear_inode = reiserfs_clear_inode,
572 .put_super = reiserfs_put_super,
573 .write_super = reiserfs_write_super,
574 .sync_fs = reiserfs_sync_fs,
575 .write_super_lockfs = reiserfs_write_super_lockfs,
576 .unlockfs = reiserfs_unlockfs,
577 .statfs = reiserfs_statfs,
578 .remount_fs = reiserfs_remount,
580 .quota_read = reiserfs_quota_read,
581 .quota_write = reiserfs_quota_write,
586 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
588 static int reiserfs_dquot_initialize(struct inode *, int);
589 static int reiserfs_dquot_drop(struct inode *);
590 static int reiserfs_write_dquot(struct dquot *);
591 static int reiserfs_acquire_dquot(struct dquot *);
592 static int reiserfs_release_dquot(struct dquot *);
593 static int reiserfs_mark_dquot_dirty(struct dquot *);
594 static int reiserfs_write_info(struct super_block *, int);
595 static int reiserfs_quota_on(struct super_block *, int, int, char *);
597 static struct dquot_operations reiserfs_quota_operations =
599 .initialize = reiserfs_dquot_initialize,
600 .drop = reiserfs_dquot_drop,
601 .alloc_space = dquot_alloc_space,
602 .alloc_inode = dquot_alloc_inode,
603 .free_space = dquot_free_space,
604 .free_inode = dquot_free_inode,
605 .transfer = dquot_transfer,
606 .write_dquot = reiserfs_write_dquot,
607 .acquire_dquot = reiserfs_acquire_dquot,
608 .release_dquot = reiserfs_release_dquot,
609 .mark_dirty = reiserfs_mark_dquot_dirty,
610 .write_info = reiserfs_write_info,
613 static struct quotactl_ops reiserfs_qctl_operations =
615 .quota_on = reiserfs_quota_on,
616 .quota_off = vfs_quota_off,
617 .quota_sync = vfs_quota_sync,
618 .get_info = vfs_get_dqinfo,
619 .set_info = vfs_set_dqinfo,
620 .get_dqblk = vfs_get_dqblk,
621 .set_dqblk = vfs_set_dqblk,
625 static struct export_operations reiserfs_export_ops = {
626 .encode_fh = reiserfs_encode_fh,
627 .decode_fh = reiserfs_decode_fh,
628 .get_parent = reiserfs_get_parent,
629 .get_dentry = reiserfs_get_dentry,
632 /* this struct is used in reiserfs_getopt () for containing the value for those
633 mount options that have values rather than being toggles. */
636 int setmask; /* bitmask which is to set on mount_options bitmask when this
637 value is found, 0 is no bits are to be changed. */
638 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
639 value is found, 0 is no bits are to be changed. This is
640 applied BEFORE setmask */
643 /* Set this bit in arg_required to allow empty arguments */
644 #define REISERFS_OPT_ALLOWEMPTY 31
646 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
650 int arg_required; /* 0 if argument is not required, not 0 otherwise */
651 const arg_desc_t * values; /* list of values accepted by an option */
652 int setmask; /* bitmask which is to set on mount_options bitmask when this
653 value is found, 0 is no bits are to be changed. */
654 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
655 value is found, 0 is no bits are to be changed. This is
656 applied BEFORE setmask */
659 /* possible values for -o data= */
660 static const arg_desc_t logging_mode[] = {
661 {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)},
662 {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)},
663 {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)},
667 /* possible values for -o barrier= */
668 static const arg_desc_t barrier_mode[] = {
669 {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH},
670 {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE},
674 /* possible values for "-o block-allocator=" and bits which are to be set in
675 s_mount_opt of reiserfs specific part of in-core super block */
676 static const arg_desc_t balloc[] = {
677 {"noborder", 1<<REISERFS_NO_BORDER, 0},
678 {"border", 0, 1<<REISERFS_NO_BORDER},
679 {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0},
680 {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0},
681 {"test4", 1<<REISERFS_TEST4, 0},
682 {"notest4", 0, 1<<REISERFS_TEST4},
686 static const arg_desc_t tails[] = {
687 {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL},
688 {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
689 {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL},
693 static const arg_desc_t error_actions[] = {
694 {"panic", 1 << REISERFS_ERROR_PANIC,
695 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
696 {"ro-remount", 1 << REISERFS_ERROR_RO,
697 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
698 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
699 {"continue", 1 << REISERFS_ERROR_CONTINUE,
700 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
705 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
706 There might be broken applications that are
707 confused by this. Use nolargeio mount option
708 to get usual i/o size = PAGE_SIZE.
711 /* proceed only one option from a list *cur - string containing of mount options
712 opts - array of options which are accepted
713 opt_arg - if option is found and requires an argument and if it is specifed
714 in the input - pointer to the argument is stored here
715 bit_flags - if option requires to set a certain bit - it is set here
716 return -1 if unknown option is found, opt->arg_required otherwise */
717 static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg,
718 unsigned long * bit_flags)
727 const opt_desc_t * opt;
728 const arg_desc_t * arg;
733 /* assume argument cannot contain commas */
734 *cur = strchr (p, ',');
740 if ( !strncmp (p, "alloc=", 6) ) {
741 /* Ugly special case, probably we should redo options parser so that
742 it can understand several arguments for some options, also so that
743 it can fill several bitfields with option values. */
744 if ( reiserfs_parse_alloc_options( s, p + 6) ) {
752 /* for every option in the list */
753 for (opt = opts; opt->option_name; opt ++) {
754 if (!strncmp (p, opt->option_name, strlen (opt->option_name))) {
756 if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT))
757 reiserfs_warning (s, "%s not supported.", p);
759 *bit_flags &= ~opt->clrmask;
760 if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT))
761 reiserfs_warning (s, "%s not supported.", p);
763 *bit_flags |= opt->setmask;
768 if (!opt->option_name) {
769 reiserfs_warning (s, "unknown mount option \"%s\"", p);
773 p += strlen (opt->option_name);
776 if (!opt->arg_required) {
777 reiserfs_warning (s, "the option \"%s\" does not require an argument",
784 if (opt->arg_required) {
785 reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name);
790 reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name);
794 /* move to the argument, or to next option if argument is not required */
797 if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) {
798 /* this catches "option=," if not allowed */
799 reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name);
804 /* *=NULLopt_arg contains pointer to argument */
806 return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY);
809 /* values possible for this option are listed in opt->values */
810 for (arg = opt->values; arg->value; arg ++) {
811 if (!strcmp (p, arg->value)) {
813 *bit_flags &= ~arg->clrmask;
814 *bit_flags |= arg->setmask;
816 return opt->arg_required;
820 reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name);
824 /* returns 0 if something is wrong in option string, 1 - otherwise */
825 static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */
826 unsigned long * mount_options,
827 /* after the parsing phase, contains the
828 collection of bitflags defining what
829 mount options were selected. */
830 unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */
832 unsigned int * commit_max_age)
837 opt_desc_t opts[] = {
838 /* Compatibility stuff, so that -o notail for old setups still work */
839 {"tails", .arg_required = 't', .values = tails},
840 {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
841 {"conv", .setmask = 1<<REISERFS_CONVERT},
842 {"attrs", .setmask = 1<<REISERFS_ATTRS},
843 {"noattrs", .clrmask = 1<<REISERFS_ATTRS},
844 #ifdef CONFIG_REISERFS_FS_XATTR
845 {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER},
846 {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER},
848 {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
849 {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
851 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
852 {"acl", .setmask = 1<<REISERFS_POSIXACL},
853 {"noacl", .clrmask = 1<<REISERFS_POSIXACL},
855 {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
856 {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
858 {"nolog",}, /* This is unsupported */
859 {"replayonly", .setmask = 1<<REPLAYONLY},
860 {"block-allocator", .arg_required = 'a', .values = balloc},
861 {"data", .arg_required = 'd', .values = logging_mode},
862 {"barrier", .arg_required = 'b', .values = barrier_mode},
863 {"resize", .arg_required = 'r', .values = NULL},
864 {"jdev", .arg_required = 'j', .values = NULL},
865 {"nolargeio", .arg_required = 'w', .values = NULL},
866 {"commit", .arg_required = 'c', .values = NULL},
869 {"errors", .arg_required = 'e', .values = error_actions},
870 {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
871 {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
872 {"jqfmt", .arg_required = 'f', .values = NULL},
877 if (!options || !*options)
878 /* use default configuration: create tails, journaling on, no
879 conversion to newest format */
882 for (pos = options; pos; ) {
883 c = reiserfs_getopt (s, &pos, opts, &arg, mount_options);
885 /* wrong option is given */
892 /* "resize=NNN" or "resize=auto" */
894 if (!strcmp(arg, "auto")) {
895 /* From JFS code, to auto-get the size.*/
896 *blocks = s->s_bdev->bd_inode->i_size >> s->s_blocksize_bits;
898 *blocks = simple_strtoul (arg, &p, 0);
900 /* NNN does not look like a number */
901 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
909 unsigned long val = simple_strtoul (arg, &p, 0);
910 /* commit=NNN (time in seconds) */
911 if ( *p != '\0' || val >= (unsigned int)-1) {
912 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
915 *commit_max_age = (unsigned int)val;
920 int val = simple_strtoul (arg, &p, 0);
923 reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg);
927 reiserfs_default_io_size = PAGE_SIZE;
929 reiserfs_default_io_size = 128 * 1024;
933 if (arg && *arg && jdev_name) {
934 if ( *jdev_name ) { //Hm, already assigned?
935 reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name);
943 if (c == 'u' || c == 'g') {
944 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
946 if (sb_any_quota_enabled(s)) {
947 reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
950 if (*arg) { /* Some filename specified? */
951 if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) {
952 reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype));
955 if (strchr(arg, '/')) {
956 reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root.");
959 REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL);
960 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
961 reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name.");
964 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
967 if (REISERFS_SB(s)->s_qf_names[qtype]) {
968 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
969 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
974 if (!strcmp(arg, "vfsold"))
975 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
976 else if (!strcmp(arg, "vfsv0"))
977 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
979 reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified.");
984 if (c == 'u' || c == 'g' || c == 'f') {
985 reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported.");
992 if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
993 reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified.");
1000 static void switch_data_mode(struct super_block *s, unsigned long mode) {
1001 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1002 (1 << REISERFS_DATA_ORDERED) |
1003 (1 << REISERFS_DATA_WRITEBACK));
1004 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1007 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1009 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1010 if (!reiserfs_data_log(s)) {
1011 switch_data_mode(s, REISERFS_DATA_LOG);
1012 reiserfs_info (s, "switching to journaled data mode\n");
1014 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1015 if (!reiserfs_data_ordered(s)) {
1016 switch_data_mode(s, REISERFS_DATA_ORDERED);
1017 reiserfs_info (s, "switching to ordered data mode\n");
1019 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1020 if (!reiserfs_data_writeback(s)) {
1021 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1022 reiserfs_info (s, "switching to writeback data mode\n");
1027 static void handle_barrier_mode(struct super_block *s, unsigned long bits) {
1028 int flush = (1 << REISERFS_BARRIER_FLUSH);
1029 int none = (1 << REISERFS_BARRIER_NONE);
1030 int all_barrier = flush | none;
1032 if (bits & all_barrier) {
1033 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1035 REISERFS_SB(s)->s_mount_opt |= flush;
1036 printk("reiserfs: enabling write barrier flush mode\n");
1037 } else if (bits & none) {
1038 REISERFS_SB(s)->s_mount_opt |= none;
1039 printk("reiserfs: write barriers turned off\n");
1044 static void handle_attrs( struct super_block *s )
1046 struct reiserfs_super_block * rs;
1048 if( reiserfs_attrs( s ) ) {
1049 rs = SB_DISK_SUPER_BLOCK (s);
1050 if( old_format_only(s) ) {
1051 reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" );
1052 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1055 if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) {
1056 reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" );
1057 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1062 static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg)
1064 struct reiserfs_super_block * rs;
1065 struct reiserfs_transaction_handle th ;
1066 unsigned long blocks;
1067 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1068 unsigned long safe_mask = 0;
1069 unsigned int commit_max_age = (unsigned int)-1;
1070 struct reiserfs_journal *journal = SB_JOURNAL(s);
1076 rs = SB_DISK_SUPER_BLOCK (s);
1078 if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1080 for (i = 0; i < MAXQUOTAS; i++)
1081 if (REISERFS_SB(s)->s_qf_names[i]) {
1082 kfree(REISERFS_SB(s)->s_qf_names[i]);
1083 REISERFS_SB(s)->s_qf_names[i] = NULL;
1091 /* Add options that are safe here */
1092 safe_mask |= 1 << REISERFS_SMALLTAIL;
1093 safe_mask |= 1 << REISERFS_LARGETAIL;
1094 safe_mask |= 1 << REISERFS_NO_BORDER;
1095 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1096 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1097 safe_mask |= 1 << REISERFS_TEST4;
1098 safe_mask |= 1 << REISERFS_ATTRS;
1099 safe_mask |= 1 << REISERFS_XATTRS_USER;
1100 safe_mask |= 1 << REISERFS_POSIXACL;
1101 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1102 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1103 safe_mask |= 1 << REISERFS_ERROR_RO;
1104 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1105 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1107 /* Update the bitmask, taking care to keep
1108 * the bits we're not allowed to change here */
1109 REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1111 if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1112 journal->j_max_commit_age = commit_max_age;
1113 journal->j_max_trans_age = commit_max_age;
1115 else if(commit_max_age == 0)
1117 /* 0 means restore defaults. */
1118 journal->j_max_commit_age = journal->j_default_max_commit_age;
1119 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1123 int rc = reiserfs_resize(s, blocks);
1128 if (*mount_flags & MS_RDONLY) {
1129 reiserfs_xattr_init (s, *mount_flags);
1130 /* remount read-only */
1131 if (s->s_flags & MS_RDONLY)
1132 /* it is read-only already */
1134 /* try to remount file system with read-only permissions */
1135 if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1139 err = journal_begin(&th, s, 10) ;
1143 /* Mounting a rw partition read-only. */
1144 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1145 set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state );
1146 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1148 /* remount read-write */
1149 if (!(s->s_flags & MS_RDONLY)) {
1150 reiserfs_xattr_init (s, *mount_flags);
1151 return 0; /* We are read-write already */
1154 if (reiserfs_is_journal_aborted (journal))
1155 return journal->j_errno;
1157 handle_data_mode(s, mount_options);
1158 handle_barrier_mode(s, mount_options);
1159 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ;
1160 s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */
1161 err = journal_begin(&th, s, 10) ;
1165 /* Mount a partition which is read-only, read-write */
1166 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1167 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1168 s->s_flags &= ~MS_RDONLY;
1169 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1170 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1171 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1172 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ;
1174 /* this will force a full flush of all journal lists */
1175 SB_JOURNAL(s)->j_must_wait = 1 ;
1176 err = journal_end(&th, s, 10) ;
1181 if (!( *mount_flags & MS_RDONLY ) ) {
1182 finish_unfinished( s );
1183 reiserfs_xattr_init (s, *mount_flags);
1189 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1190 * @sb - superblock for this filesystem
1191 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1193 * This routine counts how many free bits there are, finding the first zero
1194 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1195 * a loop of find_first_zero_bit() calls. This implementation is similar to
1196 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1197 * Should only be called on fs mount, but should be fairly efficient anyways.
1199 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1200 * will * invariably occupt block 0 represented in the bitmap. The only
1201 * exception to this is when free_count also == 0, since there will be no
1202 * free blocks at all.
1205 static void load_bitmap_info_data (struct super_block *sb,
1206 struct reiserfs_bitmap_info *bi)
1208 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1210 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1212 /* No need to scan if all 0's or all 1's.
1213 * Since we're only counting 0's, we can simply ignore all 1's */
1215 if (bi->first_zero_hint == 0) {
1216 bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3;
1218 bi->free_count += sizeof(unsigned long)*8;
1219 } else if (*cur != ~0L) {
1221 for (b = 0; b < sizeof(unsigned long)*8; b++) {
1222 if (!reiserfs_test_le_bit (b, cur)) {
1224 if (bi->first_zero_hint == 0)
1225 bi->first_zero_hint =
1226 (((char *)cur - bi->bh->b_data) << 3) + b;
1233 #ifdef CONFIG_REISERFS_CHECK
1234 // This outputs a lot of unneded info on big FSes
1235 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1236 // bi->bh->b_blocknr, bi->free_count);
1240 static int read_bitmaps (struct super_block * s)
1244 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1245 if (SB_AP_BITMAP (s) == 0)
1247 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1248 for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1249 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1250 SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr);
1251 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1252 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1254 for (i = 0; i < SB_BMAP_NR(s); i++) {
1255 wait_on_buffer(SB_AP_BITMAP (s)[i].bh);
1256 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1257 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
1258 "bitmap block (#%lu) reading failed",
1259 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1260 for (i = 0; i < SB_BMAP_NR(s); i++)
1261 brelse(SB_AP_BITMAP(s)[i].bh);
1262 vfree(SB_AP_BITMAP(s));
1263 SB_AP_BITMAP(s) = NULL;
1266 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1271 static int read_old_bitmaps (struct super_block * s)
1274 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s);
1275 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1277 /* read true bitmap */
1278 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1279 if (SB_AP_BITMAP (s) == 0)
1282 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1284 for (i = 0; i < sb_bmap_nr(rs); i ++) {
1285 SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i);
1286 if (!SB_AP_BITMAP (s)[i].bh)
1288 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1294 static int read_super_block (struct super_block * s, int offset)
1296 struct buffer_head * bh;
1297 struct reiserfs_super_block * rs;
1301 bh = sb_bread (s, offset / s->s_blocksize);
1303 reiserfs_warning (s, "sh-2006: read_super_block: "
1304 "bread failed (dev %s, block %lu, size %lu)",
1305 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1309 rs = (struct reiserfs_super_block *)bh->b_data;
1310 if (!is_any_reiserfs_magic_string (rs)) {
1316 // ok, reiserfs signature (old or new) found in at the given offset
1318 fs_blocksize = sb_blocksize(rs);
1320 sb_set_blocksize (s, fs_blocksize);
1322 bh = sb_bread (s, offset / s->s_blocksize);
1324 reiserfs_warning (s, "sh-2007: read_super_block: "
1325 "bread failed (dev %s, block %lu, size %lu)\n",
1326 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1330 rs = (struct reiserfs_super_block *)bh->b_data;
1331 if (sb_blocksize(rs) != s->s_blocksize) {
1332 reiserfs_warning (s, "sh-2011: read_super_block: "
1333 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1334 reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize);
1339 if ( rs->s_v1.s_root_block == cpu_to_le32(-1) ) {
1341 reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1342 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1343 "get newer reiserfsprogs package");
1347 SB_BUFFER_WITH_SB (s) = bh;
1348 SB_DISK_SUPER_BLOCK (s) = rs;
1350 if (is_reiserfs_jr (rs)) {
1351 /* magic is of non-standard journal filesystem, look at s_version to
1352 find which format is in use */
1353 if (sb_version(rs) == REISERFS_VERSION_2)
1354 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\""
1355 " with non-standard journal");
1356 else if (sb_version(rs) == REISERFS_VERSION_1)
1357 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\""
1358 " with non-standard journal");
1360 reiserfs_warning (s, "sh-2012: read_super_block: found unknown "
1361 "format \"%u\" of reiserfs with non-standard magic",
1367 /* s_version of standard format may contain incorrect information,
1368 so we just look at the magic string */
1369 reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n",
1370 is_reiserfs_3_5 (rs) ? "3.5" : "3.6");
1372 s->s_op = &reiserfs_sops;
1373 s->s_export_op = &reiserfs_export_ops;
1375 s->s_qcop = &reiserfs_qctl_operations;
1376 s->dq_op = &reiserfs_quota_operations;
1379 /* new format is limited by the 32 bit wide i_blocks field, want to
1380 ** be one full block below that.
1382 s->s_maxbytes = (512LL << 32) - s->s_blocksize ;
1388 /* after journal replay, reread all bitmap and super blocks */
1389 static int reread_meta_blocks(struct super_block *s) {
1391 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ;
1392 wait_on_buffer(SB_BUFFER_WITH_SB(s)) ;
1393 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1394 reiserfs_warning (s, "reread_meta_blocks, error reading the super") ;
1398 for (i = 0; i < SB_BMAP_NR(s) ; i++) {
1399 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ;
1400 wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ;
1401 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1402 reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu",
1403 i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ;
1412 /////////////////////////////////////////////////////
1413 // hash detection stuff
1416 // if root directory is empty - we set default - Yura's - hash and
1418 // FIXME: we look for only one name in a directory. If tea and yura
1419 // bith have the same value - we ask user to send report to the
1421 static __u32 find_hash_out (struct super_block * s)
1424 struct inode * inode;
1426 INITIALIZE_PATH (path);
1427 struct reiserfs_dir_entry de;
1428 __u32 hash = DEFAULT_HASH;
1430 inode = s->s_root->d_inode;
1432 do { // Some serious "goto"-hater was there ;)
1433 u32 teahash, r5hash, yurahash;
1435 make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3);
1436 retval = search_by_entry_key (s, &key, &path, &de);
1437 if (retval == IO_ERROR) {
1441 if (retval == NAME_NOT_FOUND)
1443 set_de_name_and_namelen (&de);
1444 if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) {
1445 /* allow override in this case */
1446 if (reiserfs_rupasov_hash(s)) {
1449 reiserfs_warning(s,"FS seems to be empty, autodetect "
1450 "is using the default hash");
1453 r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen));
1454 teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen));
1455 yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen));
1456 if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) ||
1457 ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ||
1458 ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) {
1459 reiserfs_warning(s,"Unable to automatically detect hash function. "
1460 "Please mount with -o hash={tea,rupasov,r5}",
1461 reiserfs_bdevname (s));
1465 if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash)
1467 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash)
1469 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash)
1472 reiserfs_warning (s,"Unrecognised hash function");
1481 // finds out which hash names are sorted with
1482 static int what_hash (struct super_block * s)
1486 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1488 /* reiserfs_hash_detect() == true if any of the hash mount options
1489 ** were used. We must check them to make sure the user isn't
1490 ** using a bad hash value
1492 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1493 code = find_hash_out (s);
1495 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1496 /* detection has found the hash, and we must check against the
1499 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1500 reiserfs_warning (s, "Error, %s hash detected, "
1501 "unable to force rupasov hash", reiserfs_hashname(code)) ;
1503 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1504 reiserfs_warning (s, "Error, %s hash detected, "
1505 "unable to force tea hash", reiserfs_hashname(code)) ;
1507 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1508 reiserfs_warning (s, "Error, %s hash detected, "
1509 "unable to force r5 hash", reiserfs_hashname(code)) ;
1513 /* find_hash_out was not called or could not determine the hash */
1514 if (reiserfs_rupasov_hash(s)) {
1516 } else if (reiserfs_tea_hash(s)) {
1518 } else if (reiserfs_r5_hash(s)) {
1523 /* if we are mounted RW, and we have a new valid hash code, update
1526 if (code != UNSET_HASH &&
1527 !(s->s_flags & MS_RDONLY) &&
1528 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1529 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1534 // return pointer to appropriate function
1535 static hashf_t hash_function (struct super_block * s)
1537 switch (what_hash (s)) {
1539 reiserfs_info (s, "Using tea hash to sort names\n");
1542 reiserfs_info (s, "Using rupasov hash to sort names\n");
1545 reiserfs_info (s, "Using r5 hash to sort names\n");
1551 // this is used to set up correct value for old partitions
1552 static int function2code (hashf_t func)
1554 if (func == keyed_hash)
1556 if (func == yura_hash)
1558 if (func == r5_hash)
1561 BUG() ; // should never happen
1566 #define SWARN(silent, s, ...) \
1568 reiserfs_warning (s, __VA_ARGS__)
1570 static int reiserfs_fill_super (struct super_block * s, void * data, int silent)
1572 struct inode *root_inode;
1574 struct reiserfs_transaction_handle th ;
1576 unsigned long blocks;
1577 unsigned int commit_max_age = 0;
1578 int jinit_done = 0 ;
1579 struct reiserfs_iget_args args ;
1580 struct reiserfs_super_block * rs;
1582 struct reiserfs_sb_info *sbi;
1583 int errval = -EINVAL;
1585 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1591 memset (sbi, 0, sizeof (struct reiserfs_sb_info));
1592 /* Set default values for options: non-aggressive tails, RO on errors */
1593 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1594 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1595 /* no preallocation minimum, be smart in
1596 reiserfs_file_write instead */
1597 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1598 /* Preallocate by 16 blocks (17-1) at once */
1599 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1600 /* Initialize the rwsem for xattr dir */
1601 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1603 /* setup default block allocator options */
1604 reiserfs_init_alloc_options(s);
1607 if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) {
1612 SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1613 "for remount only");
1617 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1618 if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1620 /* try new format (64-th 1k block), which can contain reiserfs super block */
1621 else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1622 SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s));
1626 rs = SB_DISK_SUPER_BLOCK (s);
1627 /* Let's do basic sanity check to verify that underlying device is not
1628 smaller than the filesystem. If the check fails then abort and scream,
1629 because bad stuff will happen otherwise. */
1630 if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) {
1631 SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s));
1632 SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition");
1633 SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to");
1637 sbi->s_mount_state = SB_REISERFS_STATE(s);
1638 sbi->s_mount_state = REISERFS_VALID_FS ;
1640 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1641 SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1644 #ifdef CONFIG_REISERFS_CHECK
1645 SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON");
1646 SWARN (silent, s, "- it is slow mode for debugging.");
1649 /* make data=ordered the default */
1650 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1651 !reiserfs_data_writeback(s))
1653 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1656 if (reiserfs_data_log(s)) {
1657 reiserfs_info (s, "using journaled data mode\n");
1658 } else if (reiserfs_data_ordered(s)) {
1659 reiserfs_info (s, "using ordered data mode\n");
1661 reiserfs_info (s, "using writeback data mode\n");
1663 if (reiserfs_barrier_flush(s)) {
1664 printk("reiserfs: using flush barriers\n");
1667 // set_device_ro(s->s_dev, 1) ;
1668 if( journal_init(s, jdev_name, old_format, commit_max_age) ) {
1669 SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ;
1672 jinit_done = 1 ; /* once this is set, journal_release must be called
1673 ** if we error out of the mount
1676 if (reread_meta_blocks(s)) {
1677 SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ;
1681 if (replay_only (s))
1684 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1685 SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ;
1686 s->s_flags |= MS_RDONLY ;
1688 args.objectid = REISERFS_ROOT_OBJECTID ;
1689 args.dirid = REISERFS_ROOT_PARENT_OBJECTID ;
1690 root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
1692 SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed");
1696 if (root_inode->i_state & I_NEW) {
1697 reiserfs_read_locked_inode(root_inode, &args);
1698 unlock_new_inode(root_inode);
1701 s->s_root = d_alloc_root(root_inode);
1707 // define and initialize hash function
1708 sbi->s_hash_function = hash_function (s);
1709 if (sbi->s_hash_function == NULL) {
1715 if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1))
1716 set_bit(REISERFS_3_5, &(sbi->s_properties));
1718 set_bit(REISERFS_3_6, &(sbi->s_properties));
1720 if (!(s->s_flags & MS_RDONLY)) {
1722 errval = journal_begin(&th, s, 1) ;
1728 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1730 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1731 set_sb_fs_state (rs, 0);
1733 if (old_format_only(s)) {
1734 /* filesystem of format 3.5 either with standard or non-standard
1736 if (convert_reiserfs (s)) {
1737 /* and -o conv is given */
1739 reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ;
1741 if (is_reiserfs_3_5 (rs))
1742 /* put magic string of 3.6 format. 2.2 will not be able to
1743 mount this filesystem anymore */
1744 memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
1745 sizeof (reiserfs_3_6_magic_string));
1747 set_sb_version(rs,REISERFS_VERSION_2);
1748 reiserfs_convert_objectid_map_v1(s) ;
1749 set_bit(REISERFS_3_6, &(sbi->s_properties));
1750 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1751 } else if (!silent){
1752 reiserfs_info (s, "using 3.5.x disk format\n") ;
1756 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1757 errval = journal_end(&th, s, 1) ;
1764 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1770 /* look for files which were to be removed in previous session */
1771 finish_unfinished (s);
1773 if ( old_format_only(s) && !silent) {
1774 reiserfs_info (s, "using 3.5.x disk format\n") ;
1777 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1783 // mark hash in super block: it could be unset. overwrite should be ok
1784 set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) );
1788 reiserfs_proc_info_init( s );
1790 init_waitqueue_head (&(sbi->s_wait));
1791 spin_lock_init(&sbi->bitmap_lock);
1796 if (jinit_done) { /* kill the commit thread, free journal ram */
1797 journal_release_error(NULL, s) ;
1799 if (SB_DISK_SUPER_BLOCK (s)) {
1800 for (j = 0; j < SB_BMAP_NR (s); j ++) {
1801 if (SB_AP_BITMAP (s))
1802 brelse (SB_AP_BITMAP (s)[j].bh);
1804 if (SB_AP_BITMAP (s))
1805 vfree (SB_AP_BITMAP (s));
1807 if (SB_BUFFER_WITH_SB (s))
1808 brelse(SB_BUFFER_WITH_SB (s));
1810 for (j = 0; j < MAXQUOTAS; j++) {
1811 if (sbi->s_qf_names[j])
1812 kfree(sbi->s_qf_names[j]);
1819 s->s_fs_info = NULL;
1824 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf)
1826 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
1828 buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize));
1829 buf->f_bfree = sb_free_blocks(rs);
1830 buf->f_bavail = buf->f_bfree;
1831 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1832 buf->f_bsize = s->s_blocksize;
1833 /* changed to accommodate gcc folks.*/
1834 buf->f_type = REISERFS_SUPER_MAGIC;
1839 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1841 struct reiserfs_transaction_handle th;
1844 /* We may create quota structure so we need to reserve enough blocks */
1845 reiserfs_write_lock(inode->i_sb);
1846 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
1847 ret = dquot_initialize(inode, type);
1848 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
1849 reiserfs_write_unlock(inode->i_sb);
1853 static int reiserfs_dquot_drop(struct inode *inode)
1855 struct reiserfs_transaction_handle th;
1858 /* We may delete quota structure so we need to reserve enough blocks */
1859 reiserfs_write_lock(inode->i_sb);
1860 journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
1861 ret = dquot_drop(inode);
1862 journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
1863 reiserfs_write_unlock(inode->i_sb);
1867 static int reiserfs_write_dquot(struct dquot *dquot)
1869 struct reiserfs_transaction_handle th;
1872 reiserfs_write_lock(dquot->dq_sb);
1873 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
1874 ret = dquot_commit(dquot);
1875 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
1876 reiserfs_write_unlock(dquot->dq_sb);
1880 static int reiserfs_acquire_dquot(struct dquot *dquot)
1882 struct reiserfs_transaction_handle th;
1885 reiserfs_write_lock(dquot->dq_sb);
1886 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
1887 ret = dquot_acquire(dquot);
1888 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
1889 reiserfs_write_unlock(dquot->dq_sb);
1893 static int reiserfs_release_dquot(struct dquot *dquot)
1895 struct reiserfs_transaction_handle th;
1898 reiserfs_write_lock(dquot->dq_sb);
1899 journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
1900 ret = dquot_release(dquot);
1901 journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
1902 reiserfs_write_unlock(dquot->dq_sb);
1906 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1908 /* Are we journalling quotas? */
1909 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1910 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1911 dquot_mark_dquot_dirty(dquot);
1912 return reiserfs_write_dquot(dquot);
1915 return dquot_mark_dquot_dirty(dquot);
1918 static int reiserfs_write_info(struct super_block *sb, int type)
1920 struct reiserfs_transaction_handle th;
1923 /* Data block + inode block */
1924 reiserfs_write_lock(sb);
1925 journal_begin(&th, sb, 2);
1926 ret = dquot_commit_info(sb, type);
1927 journal_end(&th, sb, 2);
1928 reiserfs_write_unlock(sb);
1933 * Turn on quotas during mount time - we need to find
1934 * the quota file and such...
1936 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1939 struct dentry *dentry;
1940 struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type],
1942 .len = strlen(REISERFS_SB(sb)->s_qf_names[type])};
1944 dentry = lookup_hash(&name, sb->s_root);
1946 return PTR_ERR(dentry);
1947 err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry);
1948 /* Now invalidate and put the dentry - quota got its own reference
1949 * to inode and dentry has at least wrong hash so we had better
1951 d_invalidate(dentry);
1957 * Standard function to be called on quota_on
1959 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
1962 struct nameidata nd;
1964 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
1967 /* Quotafile not on the same filesystem? */
1968 if (nd.mnt->mnt_sb != sb) {
1972 /* We must not pack tails for quota files on reiserfs for quota IO to work */
1973 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
1974 reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
1978 /* Not journalling quota? No more tests needed... */
1979 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
1980 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
1982 return vfs_quota_on(sb, type, format_id, path);
1984 /* Quotafile not of fs root? */
1985 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
1986 reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
1987 "Journalled quota will not work.");
1989 return vfs_quota_on(sb, type, format_id, path);
1992 /* Read data from quotafile - avoid pagecache and such because we cannot afford
1993 * acquiring the locks... As quota files are never truncated and quota code
1994 * itself serializes the operations (and noone else should touch the files)
1995 * we don't have to be afraid of races */
1996 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
1997 size_t len, loff_t off)
1999 struct inode *inode = sb_dqopt(sb)->files[type];
2000 unsigned long blk = off >> sb->s_blocksize_bits;
2001 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2003 struct buffer_head tmp_bh, *bh;
2004 loff_t i_size = i_size_read(inode);
2008 if (off+len > i_size)
2011 while (toread > 0) {
2012 tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread;
2014 /* Quota files are without tails so we can safely use this function */
2015 reiserfs_write_lock(sb);
2016 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2017 reiserfs_write_unlock(sb);
2020 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2021 memset(data, 0, tocopy);
2023 bh = sb_bread(sb, tmp_bh.b_blocknr);
2026 memcpy(data, bh->b_data+offset, tocopy);
2037 /* Write to quotafile (we know the transaction is already started and has
2038 * enough credits) */
2039 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2040 const char *data, size_t len, loff_t off)
2042 struct inode *inode = sb_dqopt(sb)->files[type];
2043 unsigned long blk = off >> sb->s_blocksize_bits;
2044 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2045 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2046 size_t towrite = len;
2047 struct buffer_head tmp_bh, *bh;
2049 down(&inode->i_sem);
2050 while (towrite > 0) {
2051 tocopy = sb->s_blocksize - offset < towrite ?
2052 sb->s_blocksize - offset : towrite;
2054 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2057 if (offset || tocopy != sb->s_blocksize)
2058 bh = sb_bread(sb, tmp_bh.b_blocknr);
2060 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2066 memcpy(bh->b_data+offset, data, tocopy);
2067 flush_dcache_page(bh->b_page);
2068 set_buffer_uptodate(bh);
2070 reiserfs_prepare_for_journal(sb, bh, 1);
2071 journal_mark_dirty(current->journal_info, sb, bh);
2073 reiserfs_add_ordered_list(inode, bh);
2083 if (inode->i_size < off+len-towrite)
2084 i_size_write(inode, off+len-towrite);
2086 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2087 mark_inode_dirty(inode);
2089 return len - towrite;
2094 static struct super_block*
2095 get_super_block (struct file_system_type *fs_type, int flags,
2096 const char *dev_name, void *data)
2098 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2102 init_reiserfs_fs ( void )
2106 if ((ret = init_inodecache ())) {
2110 if ((ret = reiserfs_xattr_register_handlers ()))
2111 goto failed_reiserfs_xattr_register_handlers;
2113 reiserfs_proc_info_global_init ();
2114 reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc);
2116 ret = register_filesystem (& reiserfs_fs_type);
2122 reiserfs_xattr_unregister_handlers ();
2124 failed_reiserfs_xattr_register_handlers:
2125 reiserfs_proc_unregister_global ("version");
2126 reiserfs_proc_info_global_done ();
2127 destroy_inodecache ();
2133 exit_reiserfs_fs ( void )
2135 reiserfs_xattr_unregister_handlers ();
2136 reiserfs_proc_unregister_global ("version");
2137 reiserfs_proc_info_global_done ();
2138 unregister_filesystem (& reiserfs_fs_type);
2139 destroy_inodecache ();
2142 struct file_system_type reiserfs_fs_type = {
2143 .owner = THIS_MODULE,
2145 .get_sb = get_super_block,
2146 .kill_sb = kill_block_super,
2147 .fs_flags = FS_REQUIRES_DEV,
2150 MODULE_DESCRIPTION ("ReiserFS journaled filesystem");
2151 MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>");
2152 MODULE_LICENSE ("GPL");
2154 module_init (init_reiserfs_fs);
2155 module_exit (exit_reiserfs_fs);