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.k_dir_id = ~0U;
168 max_cpu_key.on_disk_key.k_objectid = ~0U;
169 set_cpu_key_k_offset (&max_cpu_key, ~0U);
170 max_cpu_key.key_length = 3;
173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
178 s->s_flags |= MS_ACTIVE;
180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
182 if (REISERFS_SB(s)->s_qf_names[i]) {
183 int ret = reiserfs_quota_on_mount(s, i);
185 reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret);
191 REISERFS_SB(s)->s_is_unlinked_ok = 1;
193 retval = search_item (s, &max_cpu_key, &path);
194 if (retval != ITEM_NOT_FOUND) {
195 reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d",
200 bh = get_last_bh (&path);
201 item_pos = get_item_pos (&path);
202 if (item_pos != B_NR_ITEMS (bh)) {
203 reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found");
207 ih = B_N_PITEM_HEAD (bh, item_pos);
209 if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
210 /* there are no "save" links anymore */
213 save_link_key = ih->ih_key;
214 if (is_indirect_le_ih (ih))
219 /* reiserfs_iget needs k_dirid and k_objectid only */
220 item = B_I_PITEM (bh, ih);
221 obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__le32 *)item);
222 obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid);
223 obj_key.on_disk_key.k_offset = 0;
224 obj_key.on_disk_key.k_type = 0;
228 inode = reiserfs_iget (s, &obj_key);
230 /* the unlink almost completed, it just did not manage to remove
231 "save" link and release objectid */
232 reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K",
234 retval = remove_save_link_only (s, &save_link_key, 1);
238 if (!truncate && inode->i_nlink) {
239 /* file is not unlinked */
240 reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked",
242 retval = remove_save_link_only (s, &save_link_key, 0);
247 if (truncate && S_ISDIR (inode->i_mode) ) {
248 /* We got a truncate request for a dir which is impossible.
249 The only imaginable way is to execute unfinished truncate request
250 then boot into old kernel, remove the file and create dir with
252 reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode));
253 retval = remove_save_link_only (s, &save_link_key, 0);
260 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
261 /* not completed truncate found. New size was committed together
263 reiserfs_info (s, "Truncating %k to %Ld ..",
264 INODE_PKEY (inode), inode->i_size);
265 reiserfs_truncate_file (inode, 0/*don't update modification time*/);
266 retval = remove_save_link (inode, truncate);
268 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
269 /* not completed unlink (rmdir) found */
270 reiserfs_info (s, "Removing %k..", INODE_PKEY (inode));
271 /* removal gets completed in iput */
279 REISERFS_SB(s)->s_is_unlinked_ok = 0;
282 /* Turn quotas off */
283 for (i = 0; i < MAXQUOTAS; i++) {
284 if (sb_dqopt(s)->files[i])
285 vfs_quota_off_mount(s, i);
288 /* Restore the flag back */
289 s->s_flags &= ~MS_ACTIVE;
293 reiserfs_info (s, "There were %d uncompleted unlinks/truncates. "
294 "Completed\n", done);
298 /* to protect file being unlinked from getting lost we "safe" link files
299 being unlinked. This link will be deleted in the same transaction with last
300 item of file. mounting the filesytem we scan all these links and remove
301 files which almost got lost */
302 void add_save_link (struct reiserfs_transaction_handle * th,
303 struct inode * inode, int truncate)
305 INITIALIZE_PATH (path);
311 BUG_ON (!th->t_trans_id);
313 /* file can only get one "save link" of each kind */
315 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ),
316 "saved link already exists for truncated inode %lx",
317 ( long ) inode -> i_ino );
319 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ),
320 "saved link already exists for unlinked inode %lx",
321 ( long ) inode -> i_ino );
323 /* setup key of "save" link */
324 key.version = KEY_FORMAT_3_5;
325 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
326 key.on_disk_key.k_objectid = inode->i_ino;
328 /* unlink, rmdir, rename */
329 set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize);
330 set_cpu_key_k_type (&key, TYPE_DIRECT);
332 /* item head of "safe" link */
333 make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
334 4/*length*/, 0xffff/*free space*/);
337 if (S_ISDIR (inode->i_mode))
338 reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode));
339 set_cpu_key_k_offset (&key, 1);
340 set_cpu_key_k_type (&key, TYPE_INDIRECT);
342 /* item head of "safe" link */
343 make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT,
344 4/*length*/, 0/*free space*/);
348 /* look for its place in the tree */
349 retval = search_item (inode->i_sb, &key, &path);
350 if (retval != ITEM_NOT_FOUND) {
351 if ( retval != -ENOSPC )
352 reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:"
353 "search_by_key (%K) returned %d", &key, retval);
358 /* body of "save" link */
359 link = INODE_PKEY (inode)->k_dir_id;
361 /* put "save" link inot tree, don't charge quota to anyone */
362 retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link);
364 if (retval != -ENOSPC)
365 reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d",
369 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
371 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
376 /* this opens transaction unlike add_save_link */
377 int remove_save_link (struct inode * inode, int truncate)
379 struct reiserfs_transaction_handle th;
380 struct reiserfs_key key;
383 /* we are going to do one balancing only */
384 err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
388 /* setup key of "save" link */
389 key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID);
390 key.k_objectid = INODE_PKEY (inode)->k_objectid;
392 /* unlink, rmdir, rename */
393 set_le_key_k_offset (KEY_FORMAT_3_5, &key,
394 1 + inode->i_sb->s_blocksize);
395 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT);
398 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1);
399 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
403 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) ||
405 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) )
406 /* don't take quota bytes from anywhere */
407 reiserfs_delete_solid_item (&th, NULL, &key);
409 reiserfs_release_objectid (&th, inode->i_ino);
410 REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask;
412 REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask;
414 return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
418 static void reiserfs_put_super (struct super_block * s)
421 struct reiserfs_transaction_handle th ;
424 if (REISERFS_SB(s)->xattr_root) {
425 d_invalidate (REISERFS_SB(s)->xattr_root);
426 dput (REISERFS_SB(s)->xattr_root);
429 if (REISERFS_SB(s)->priv_root) {
430 d_invalidate (REISERFS_SB(s)->priv_root);
431 dput (REISERFS_SB(s)->priv_root);
434 /* change file system state to current state if it was mounted with read-write permissions */
435 if (!(s->s_flags & MS_RDONLY)) {
436 if (!journal_begin(&th, s, 10)) {
437 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
438 set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state );
439 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
443 /* note, journal_release checks for readonly mount, and can decide not
444 ** to do a journal_end
446 journal_release(&th, s) ;
448 for (i = 0; i < SB_BMAP_NR (s); i ++)
449 brelse (SB_AP_BITMAP (s)[i].bh);
451 vfree (SB_AP_BITMAP (s));
453 brelse (SB_BUFFER_WITH_SB (s));
455 print_statistics (s);
457 if (REISERFS_SB(s)->s_kmallocs != 0) {
458 reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d",
459 REISERFS_SB(s)->s_kmallocs);
462 if (REISERFS_SB(s)->reserved_blocks != 0) {
463 reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d",
464 REISERFS_SB(s)->reserved_blocks);
467 reiserfs_proc_info_done( s );
475 static kmem_cache_t * reiserfs_inode_cachep;
477 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
479 struct reiserfs_inode_info *ei;
480 ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
483 return &ei->vfs_inode;
486 static void reiserfs_destroy_inode(struct inode *inode)
488 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
491 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
493 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo;
495 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
496 SLAB_CTOR_CONSTRUCTOR) {
497 INIT_LIST_HEAD(&ei->i_prealloc_list) ;
498 inode_init_once(&ei->vfs_inode);
499 ei->i_acl_access = NULL;
500 ei->i_acl_default = NULL;
504 static int init_inodecache(void)
506 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
507 sizeof(struct reiserfs_inode_info),
508 0, SLAB_RECLAIM_ACCOUNT,
510 if (reiserfs_inode_cachep == NULL)
515 static void destroy_inodecache(void)
517 if (kmem_cache_destroy(reiserfs_inode_cachep))
518 reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed");
521 /* we don't mark inodes dirty, we just log them */
522 static void reiserfs_dirty_inode (struct inode * inode) {
523 struct reiserfs_transaction_handle th ;
526 if (inode->i_sb->s_flags & MS_RDONLY) {
527 reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS",
531 reiserfs_write_lock(inode->i_sb);
533 /* this is really only used for atime updates, so they don't have
534 ** to be included in O_SYNC or fsync
536 err = journal_begin(&th, inode->i_sb, 1) ;
538 reiserfs_write_unlock (inode->i_sb);
541 reiserfs_update_sd (&th, inode);
542 journal_end(&th, inode->i_sb, 1) ;
543 reiserfs_write_unlock(inode->i_sb);
546 static void reiserfs_clear_inode (struct inode *inode)
548 struct posix_acl *acl;
550 acl = REISERFS_I(inode)->i_acl_access;
551 if (acl && !IS_ERR (acl))
552 posix_acl_release (acl);
553 REISERFS_I(inode)->i_acl_access = NULL;
555 acl = REISERFS_I(inode)->i_acl_default;
556 if (acl && !IS_ERR (acl))
557 posix_acl_release (acl);
558 REISERFS_I(inode)->i_acl_default = NULL;
562 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
563 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t);
566 static struct super_operations reiserfs_sops =
568 .alloc_inode = reiserfs_alloc_inode,
569 .destroy_inode = reiserfs_destroy_inode,
570 .write_inode = reiserfs_write_inode,
571 .dirty_inode = reiserfs_dirty_inode,
572 .delete_inode = reiserfs_delete_inode,
573 .clear_inode = reiserfs_clear_inode,
574 .put_super = reiserfs_put_super,
575 .write_super = reiserfs_write_super,
576 .sync_fs = reiserfs_sync_fs,
577 .write_super_lockfs = reiserfs_write_super_lockfs,
578 .unlockfs = reiserfs_unlockfs,
579 .statfs = reiserfs_statfs,
580 .remount_fs = reiserfs_remount,
582 .quota_read = reiserfs_quota_read,
583 .quota_write = reiserfs_quota_write,
588 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
590 static int reiserfs_dquot_initialize(struct inode *, int);
591 static int reiserfs_dquot_drop(struct inode *);
592 static int reiserfs_write_dquot(struct dquot *);
593 static int reiserfs_acquire_dquot(struct dquot *);
594 static int reiserfs_release_dquot(struct dquot *);
595 static int reiserfs_mark_dquot_dirty(struct dquot *);
596 static int reiserfs_write_info(struct super_block *, int);
597 static int reiserfs_quota_on(struct super_block *, int, int, char *);
599 static struct dquot_operations reiserfs_quota_operations =
601 .initialize = reiserfs_dquot_initialize,
602 .drop = reiserfs_dquot_drop,
603 .alloc_space = dquot_alloc_space,
604 .alloc_inode = dquot_alloc_inode,
605 .free_space = dquot_free_space,
606 .free_inode = dquot_free_inode,
607 .transfer = dquot_transfer,
608 .write_dquot = reiserfs_write_dquot,
609 .acquire_dquot = reiserfs_acquire_dquot,
610 .release_dquot = reiserfs_release_dquot,
611 .mark_dirty = reiserfs_mark_dquot_dirty,
612 .write_info = reiserfs_write_info,
615 static struct quotactl_ops reiserfs_qctl_operations =
617 .quota_on = reiserfs_quota_on,
618 .quota_off = vfs_quota_off,
619 .quota_sync = vfs_quota_sync,
620 .get_info = vfs_get_dqinfo,
621 .set_info = vfs_set_dqinfo,
622 .get_dqblk = vfs_get_dqblk,
623 .set_dqblk = vfs_set_dqblk,
627 static struct export_operations reiserfs_export_ops = {
628 .encode_fh = reiserfs_encode_fh,
629 .decode_fh = reiserfs_decode_fh,
630 .get_parent = reiserfs_get_parent,
631 .get_dentry = reiserfs_get_dentry,
634 /* this struct is used in reiserfs_getopt () for containing the value for those
635 mount options that have values rather than being toggles. */
638 int setmask; /* bitmask which is to set on mount_options bitmask when this
639 value is found, 0 is no bits are to be changed. */
640 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
641 value is found, 0 is no bits are to be changed. This is
642 applied BEFORE setmask */
645 /* Set this bit in arg_required to allow empty arguments */
646 #define REISERFS_OPT_ALLOWEMPTY 31
648 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
652 int arg_required; /* 0 if argument is not required, not 0 otherwise */
653 const arg_desc_t * values; /* list of values accepted by an option */
654 int setmask; /* bitmask which is to set on mount_options bitmask when this
655 value is found, 0 is no bits are to be changed. */
656 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
657 value is found, 0 is no bits are to be changed. This is
658 applied BEFORE setmask */
661 /* possible values for -o data= */
662 static const arg_desc_t logging_mode[] = {
663 {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)},
664 {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)},
665 {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)},
669 /* possible values for -o barrier= */
670 static const arg_desc_t barrier_mode[] = {
671 {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH},
672 {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE},
676 /* possible values for "-o block-allocator=" and bits which are to be set in
677 s_mount_opt of reiserfs specific part of in-core super block */
678 static const arg_desc_t balloc[] = {
679 {"noborder", 1<<REISERFS_NO_BORDER, 0},
680 {"border", 0, 1<<REISERFS_NO_BORDER},
681 {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0},
682 {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0},
683 {"test4", 1<<REISERFS_TEST4, 0},
684 {"notest4", 0, 1<<REISERFS_TEST4},
688 static const arg_desc_t tails[] = {
689 {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL},
690 {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
691 {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL},
695 static const arg_desc_t error_actions[] = {
696 {"panic", 1 << REISERFS_ERROR_PANIC,
697 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
698 {"ro-remount", 1 << REISERFS_ERROR_RO,
699 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
700 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
701 {"continue", 1 << REISERFS_ERROR_CONTINUE,
702 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
707 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
708 There might be broken applications that are
709 confused by this. Use nolargeio mount option
710 to get usual i/o size = PAGE_SIZE.
713 /* proceed only one option from a list *cur - string containing of mount options
714 opts - array of options which are accepted
715 opt_arg - if option is found and requires an argument and if it is specifed
716 in the input - pointer to the argument is stored here
717 bit_flags - if option requires to set a certain bit - it is set here
718 return -1 if unknown option is found, opt->arg_required otherwise */
719 static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg,
720 unsigned long * bit_flags)
729 const opt_desc_t * opt;
730 const arg_desc_t * arg;
735 /* assume argument cannot contain commas */
736 *cur = strchr (p, ',');
742 if ( !strncmp (p, "alloc=", 6) ) {
743 /* Ugly special case, probably we should redo options parser so that
744 it can understand several arguments for some options, also so that
745 it can fill several bitfields with option values. */
746 if ( reiserfs_parse_alloc_options( s, p + 6) ) {
754 /* for every option in the list */
755 for (opt = opts; opt->option_name; opt ++) {
756 if (!strncmp (p, opt->option_name, strlen (opt->option_name))) {
758 if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT))
759 reiserfs_warning (s, "%s not supported.", p);
761 *bit_flags &= ~opt->clrmask;
762 if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT))
763 reiserfs_warning (s, "%s not supported.", p);
765 *bit_flags |= opt->setmask;
770 if (!opt->option_name) {
771 reiserfs_warning (s, "unknown mount option \"%s\"", p);
775 p += strlen (opt->option_name);
778 if (!opt->arg_required) {
779 reiserfs_warning (s, "the option \"%s\" does not require an argument",
786 if (opt->arg_required) {
787 reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name);
792 reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name);
796 /* move to the argument, or to next option if argument is not required */
799 if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) {
800 /* this catches "option=," if not allowed */
801 reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name);
806 /* *=NULLopt_arg contains pointer to argument */
808 return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY);
811 /* values possible for this option are listed in opt->values */
812 for (arg = opt->values; arg->value; arg ++) {
813 if (!strcmp (p, arg->value)) {
815 *bit_flags &= ~arg->clrmask;
816 *bit_flags |= arg->setmask;
818 return opt->arg_required;
822 reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name);
826 /* returns 0 if something is wrong in option string, 1 - otherwise */
827 static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */
828 unsigned long * mount_options,
829 /* after the parsing phase, contains the
830 collection of bitflags defining what
831 mount options were selected. */
832 unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */
834 unsigned int * commit_max_age)
839 opt_desc_t opts[] = {
840 /* Compatibility stuff, so that -o notail for old setups still work */
841 {"tails", .arg_required = 't', .values = tails},
842 {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
843 {"conv", .setmask = 1<<REISERFS_CONVERT},
844 {"attrs", .setmask = 1<<REISERFS_ATTRS},
845 {"noattrs", .clrmask = 1<<REISERFS_ATTRS},
846 #ifdef CONFIG_REISERFS_FS_XATTR
847 {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER},
848 {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER},
850 {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
851 {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
853 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
854 {"acl", .setmask = 1<<REISERFS_POSIXACL},
855 {"noacl", .clrmask = 1<<REISERFS_POSIXACL},
857 {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
858 {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
860 {"nolog",}, /* This is unsupported */
861 {"replayonly", .setmask = 1<<REPLAYONLY},
862 {"block-allocator", .arg_required = 'a', .values = balloc},
863 {"data", .arg_required = 'd', .values = logging_mode},
864 {"barrier", .arg_required = 'b', .values = barrier_mode},
865 {"resize", .arg_required = 'r', .values = NULL},
866 {"jdev", .arg_required = 'j', .values = NULL},
867 {"nolargeio", .arg_required = 'w', .values = NULL},
868 {"commit", .arg_required = 'c', .values = NULL},
869 {"usrquota", .setmask = 1<<REISERFS_QUOTA},
870 {"grpquota", .setmask = 1<<REISERFS_QUOTA},
871 {"noquota", .clrmask = 1<<REISERFS_QUOTA},
872 {"errors", .arg_required = 'e', .values = error_actions},
873 {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
874 {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
875 {"jqfmt", .arg_required = 'f', .values = NULL},
880 if (!options || !*options)
881 /* use default configuration: create tails, journaling on, no
882 conversion to newest format */
885 for (pos = options; pos; ) {
886 c = reiserfs_getopt (s, &pos, opts, &arg, mount_options);
888 /* wrong option is given */
895 /* "resize=NNN" or "resize=auto" */
897 if (!strcmp(arg, "auto")) {
898 /* From JFS code, to auto-get the size.*/
899 *blocks = s->s_bdev->bd_inode->i_size >> s->s_blocksize_bits;
901 *blocks = simple_strtoul (arg, &p, 0);
903 /* NNN does not look like a number */
904 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
912 unsigned long val = simple_strtoul (arg, &p, 0);
913 /* commit=NNN (time in seconds) */
914 if ( *p != '\0' || val >= (unsigned int)-1) {
915 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
918 *commit_max_age = (unsigned int)val;
923 int val = simple_strtoul (arg, &p, 0);
926 reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg);
930 reiserfs_default_io_size = PAGE_SIZE;
932 reiserfs_default_io_size = 128 * 1024;
936 if (arg && *arg && jdev_name) {
937 if ( *jdev_name ) { //Hm, already assigned?
938 reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name);
946 if (c == 'u' || c == 'g') {
947 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
949 if (sb_any_quota_enabled(s)) {
950 reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
953 if (*arg) { /* Some filename specified? */
954 if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) {
955 reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype));
958 if (strchr(arg, '/')) {
959 reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root.");
962 REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL);
963 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
964 reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name.");
967 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
968 *mount_options |= 1<<REISERFS_QUOTA;
971 if (REISERFS_SB(s)->s_qf_names[qtype]) {
972 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
973 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
978 if (!strcmp(arg, "vfsold"))
979 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
980 else if (!strcmp(arg, "vfsv0"))
981 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
983 reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified.");
988 if (c == 'u' || c == 'g' || c == 'f') {
989 reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported.");
996 if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
997 reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified.");
1000 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1001 if (!(*mount_options & (1<<REISERFS_QUOTA)) && sb_any_quota_enabled(s)) {
1002 reiserfs_warning(s, "reiserfs_parse_options: quota options must be present when quota is turned on.");
1010 static void switch_data_mode(struct super_block *s, unsigned long mode) {
1011 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1012 (1 << REISERFS_DATA_ORDERED) |
1013 (1 << REISERFS_DATA_WRITEBACK));
1014 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1017 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1019 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1020 if (!reiserfs_data_log(s)) {
1021 switch_data_mode(s, REISERFS_DATA_LOG);
1022 reiserfs_info (s, "switching to journaled data mode\n");
1024 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1025 if (!reiserfs_data_ordered(s)) {
1026 switch_data_mode(s, REISERFS_DATA_ORDERED);
1027 reiserfs_info (s, "switching to ordered data mode\n");
1029 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1030 if (!reiserfs_data_writeback(s)) {
1031 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1032 reiserfs_info (s, "switching to writeback data mode\n");
1037 static void handle_barrier_mode(struct super_block *s, unsigned long bits) {
1038 int flush = (1 << REISERFS_BARRIER_FLUSH);
1039 int none = (1 << REISERFS_BARRIER_NONE);
1040 int all_barrier = flush | none;
1042 if (bits & all_barrier) {
1043 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1045 REISERFS_SB(s)->s_mount_opt |= flush;
1046 printk("reiserfs: enabling write barrier flush mode\n");
1047 } else if (bits & none) {
1048 REISERFS_SB(s)->s_mount_opt |= none;
1049 printk("reiserfs: write barriers turned off\n");
1054 static void handle_attrs( struct super_block *s )
1056 struct reiserfs_super_block * rs;
1058 if( reiserfs_attrs( s ) ) {
1059 rs = SB_DISK_SUPER_BLOCK (s);
1060 if( old_format_only(s) ) {
1061 reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" );
1062 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1065 if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) {
1066 reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" );
1067 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1072 static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg)
1074 struct reiserfs_super_block * rs;
1075 struct reiserfs_transaction_handle th ;
1076 unsigned long blocks;
1077 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1078 unsigned long safe_mask = 0;
1079 unsigned int commit_max_age = (unsigned int)-1;
1080 struct reiserfs_journal *journal = SB_JOURNAL(s);
1086 rs = SB_DISK_SUPER_BLOCK (s);
1088 if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1090 for (i = 0; i < MAXQUOTAS; i++)
1091 if (REISERFS_SB(s)->s_qf_names[i]) {
1092 kfree(REISERFS_SB(s)->s_qf_names[i]);
1093 REISERFS_SB(s)->s_qf_names[i] = NULL;
1101 /* Add options that are safe here */
1102 safe_mask |= 1 << REISERFS_SMALLTAIL;
1103 safe_mask |= 1 << REISERFS_LARGETAIL;
1104 safe_mask |= 1 << REISERFS_NO_BORDER;
1105 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1106 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1107 safe_mask |= 1 << REISERFS_TEST4;
1108 safe_mask |= 1 << REISERFS_ATTRS;
1109 safe_mask |= 1 << REISERFS_XATTRS_USER;
1110 safe_mask |= 1 << REISERFS_POSIXACL;
1111 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1112 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1113 safe_mask |= 1 << REISERFS_ERROR_RO;
1114 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1115 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1116 safe_mask |= 1 << REISERFS_QUOTA;
1118 /* Update the bitmask, taking care to keep
1119 * the bits we're not allowed to change here */
1120 REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1122 if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1123 journal->j_max_commit_age = commit_max_age;
1124 journal->j_max_trans_age = commit_max_age;
1126 else if(commit_max_age == 0)
1128 /* 0 means restore defaults. */
1129 journal->j_max_commit_age = journal->j_default_max_commit_age;
1130 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1134 int rc = reiserfs_resize(s, blocks);
1139 if (*mount_flags & MS_RDONLY) {
1140 reiserfs_xattr_init (s, *mount_flags);
1141 /* remount read-only */
1142 if (s->s_flags & MS_RDONLY)
1143 /* it is read-only already */
1145 /* try to remount file system with read-only permissions */
1146 if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1150 err = journal_begin(&th, s, 10) ;
1154 /* Mounting a rw partition read-only. */
1155 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1156 set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state );
1157 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1159 /* remount read-write */
1160 if (!(s->s_flags & MS_RDONLY)) {
1161 reiserfs_xattr_init (s, *mount_flags);
1162 return 0; /* We are read-write already */
1165 if (reiserfs_is_journal_aborted (journal))
1166 return journal->j_errno;
1168 handle_data_mode(s, mount_options);
1169 handle_barrier_mode(s, mount_options);
1170 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ;
1171 s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */
1172 err = journal_begin(&th, s, 10) ;
1176 /* Mount a partition which is read-only, read-write */
1177 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1178 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1179 s->s_flags &= ~MS_RDONLY;
1180 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1181 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1182 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1183 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ;
1185 /* this will force a full flush of all journal lists */
1186 SB_JOURNAL(s)->j_must_wait = 1 ;
1187 err = journal_end(&th, s, 10) ;
1192 if (!( *mount_flags & MS_RDONLY ) ) {
1193 finish_unfinished( s );
1194 reiserfs_xattr_init (s, *mount_flags);
1200 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1201 * @sb - superblock for this filesystem
1202 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1204 * This routine counts how many free bits there are, finding the first zero
1205 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1206 * a loop of find_first_zero_bit() calls. This implementation is similar to
1207 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1208 * Should only be called on fs mount, but should be fairly efficient anyways.
1210 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1211 * will * invariably occupt block 0 represented in the bitmap. The only
1212 * exception to this is when free_count also == 0, since there will be no
1213 * free blocks at all.
1216 static void load_bitmap_info_data (struct super_block *sb,
1217 struct reiserfs_bitmap_info *bi)
1219 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1221 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1223 /* No need to scan if all 0's or all 1's.
1224 * Since we're only counting 0's, we can simply ignore all 1's */
1226 if (bi->first_zero_hint == 0) {
1227 bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3;
1229 bi->free_count += sizeof(unsigned long)*8;
1230 } else if (*cur != ~0L) {
1232 for (b = 0; b < sizeof(unsigned long)*8; b++) {
1233 if (!reiserfs_test_le_bit (b, cur)) {
1235 if (bi->first_zero_hint == 0)
1236 bi->first_zero_hint =
1237 (((char *)cur - bi->bh->b_data) << 3) + b;
1244 #ifdef CONFIG_REISERFS_CHECK
1245 // This outputs a lot of unneded info on big FSes
1246 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1247 // bi->bh->b_blocknr, bi->free_count);
1251 static int read_bitmaps (struct super_block * s)
1255 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1256 if (SB_AP_BITMAP (s) == 0)
1258 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1259 for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1260 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1261 SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr);
1262 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1263 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1265 for (i = 0; i < SB_BMAP_NR(s); i++) {
1266 wait_on_buffer(SB_AP_BITMAP (s)[i].bh);
1267 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1268 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
1269 "bitmap block (#%lu) reading failed",
1270 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1271 for (i = 0; i < SB_BMAP_NR(s); i++)
1272 brelse(SB_AP_BITMAP(s)[i].bh);
1273 vfree(SB_AP_BITMAP(s));
1274 SB_AP_BITMAP(s) = NULL;
1277 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1282 static int read_old_bitmaps (struct super_block * s)
1285 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s);
1286 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1288 /* read true bitmap */
1289 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1290 if (SB_AP_BITMAP (s) == 0)
1293 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1295 for (i = 0; i < sb_bmap_nr(rs); i ++) {
1296 SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i);
1297 if (!SB_AP_BITMAP (s)[i].bh)
1299 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1305 static int read_super_block (struct super_block * s, int offset)
1307 struct buffer_head * bh;
1308 struct reiserfs_super_block * rs;
1312 bh = sb_bread (s, offset / s->s_blocksize);
1314 reiserfs_warning (s, "sh-2006: read_super_block: "
1315 "bread failed (dev %s, block %lu, size %lu)",
1316 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1320 rs = (struct reiserfs_super_block *)bh->b_data;
1321 if (!is_any_reiserfs_magic_string (rs)) {
1327 // ok, reiserfs signature (old or new) found in at the given offset
1329 fs_blocksize = sb_blocksize(rs);
1331 sb_set_blocksize (s, fs_blocksize);
1333 bh = sb_bread (s, offset / s->s_blocksize);
1335 reiserfs_warning (s, "sh-2007: read_super_block: "
1336 "bread failed (dev %s, block %lu, size %lu)\n",
1337 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1341 rs = (struct reiserfs_super_block *)bh->b_data;
1342 if (sb_blocksize(rs) != s->s_blocksize) {
1343 reiserfs_warning (s, "sh-2011: read_super_block: "
1344 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1345 reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize);
1350 if ( rs->s_v1.s_root_block == cpu_to_le32(-1) ) {
1352 reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1353 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1354 "get newer reiserfsprogs package");
1358 SB_BUFFER_WITH_SB (s) = bh;
1359 SB_DISK_SUPER_BLOCK (s) = rs;
1361 if (is_reiserfs_jr (rs)) {
1362 /* magic is of non-standard journal filesystem, look at s_version to
1363 find which format is in use */
1364 if (sb_version(rs) == REISERFS_VERSION_2)
1365 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\""
1366 " with non-standard journal");
1367 else if (sb_version(rs) == REISERFS_VERSION_1)
1368 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\""
1369 " with non-standard journal");
1371 reiserfs_warning (s, "sh-2012: read_super_block: found unknown "
1372 "format \"%u\" of reiserfs with non-standard magic",
1378 /* s_version of standard format may contain incorrect information,
1379 so we just look at the magic string */
1380 reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n",
1381 is_reiserfs_3_5 (rs) ? "3.5" : "3.6");
1383 s->s_op = &reiserfs_sops;
1384 s->s_export_op = &reiserfs_export_ops;
1386 s->s_qcop = &reiserfs_qctl_operations;
1387 s->dq_op = &reiserfs_quota_operations;
1390 /* new format is limited by the 32 bit wide i_blocks field, want to
1391 ** be one full block below that.
1393 s->s_maxbytes = (512LL << 32) - s->s_blocksize ;
1399 /* after journal replay, reread all bitmap and super blocks */
1400 static int reread_meta_blocks(struct super_block *s) {
1402 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ;
1403 wait_on_buffer(SB_BUFFER_WITH_SB(s)) ;
1404 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1405 reiserfs_warning (s, "reread_meta_blocks, error reading the super") ;
1409 for (i = 0; i < SB_BMAP_NR(s) ; i++) {
1410 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ;
1411 wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ;
1412 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1413 reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu",
1414 i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ;
1423 /////////////////////////////////////////////////////
1424 // hash detection stuff
1427 // if root directory is empty - we set default - Yura's - hash and
1429 // FIXME: we look for only one name in a directory. If tea and yura
1430 // bith have the same value - we ask user to send report to the
1432 static __u32 find_hash_out (struct super_block * s)
1435 struct inode * inode;
1437 INITIALIZE_PATH (path);
1438 struct reiserfs_dir_entry de;
1439 __u32 hash = DEFAULT_HASH;
1441 inode = s->s_root->d_inode;
1443 do { // Some serious "goto"-hater was there ;)
1444 u32 teahash, r5hash, yurahash;
1446 make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3);
1447 retval = search_by_entry_key (s, &key, &path, &de);
1448 if (retval == IO_ERROR) {
1452 if (retval == NAME_NOT_FOUND)
1454 set_de_name_and_namelen (&de);
1455 if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) {
1456 /* allow override in this case */
1457 if (reiserfs_rupasov_hash(s)) {
1460 reiserfs_warning(s,"FS seems to be empty, autodetect "
1461 "is using the default hash");
1464 r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen));
1465 teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen));
1466 yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen));
1467 if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) ||
1468 ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ||
1469 ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) {
1470 reiserfs_warning(s,"Unable to automatically detect hash function. "
1471 "Please mount with -o hash={tea,rupasov,r5}",
1472 reiserfs_bdevname (s));
1476 if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash)
1478 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash)
1480 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash)
1483 reiserfs_warning (s,"Unrecognised hash function");
1492 // finds out which hash names are sorted with
1493 static int what_hash (struct super_block * s)
1497 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1499 /* reiserfs_hash_detect() == true if any of the hash mount options
1500 ** were used. We must check them to make sure the user isn't
1501 ** using a bad hash value
1503 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1504 code = find_hash_out (s);
1506 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1507 /* detection has found the hash, and we must check against the
1510 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1511 reiserfs_warning (s, "Error, %s hash detected, "
1512 "unable to force rupasov hash", reiserfs_hashname(code)) ;
1514 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1515 reiserfs_warning (s, "Error, %s hash detected, "
1516 "unable to force tea hash", reiserfs_hashname(code)) ;
1518 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1519 reiserfs_warning (s, "Error, %s hash detected, "
1520 "unable to force r5 hash", reiserfs_hashname(code)) ;
1524 /* find_hash_out was not called or could not determine the hash */
1525 if (reiserfs_rupasov_hash(s)) {
1527 } else if (reiserfs_tea_hash(s)) {
1529 } else if (reiserfs_r5_hash(s)) {
1534 /* if we are mounted RW, and we have a new valid hash code, update
1537 if (code != UNSET_HASH &&
1538 !(s->s_flags & MS_RDONLY) &&
1539 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1540 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1545 // return pointer to appropriate function
1546 static hashf_t hash_function (struct super_block * s)
1548 switch (what_hash (s)) {
1550 reiserfs_info (s, "Using tea hash to sort names\n");
1553 reiserfs_info (s, "Using rupasov hash to sort names\n");
1556 reiserfs_info (s, "Using r5 hash to sort names\n");
1562 // this is used to set up correct value for old partitions
1563 static int function2code (hashf_t func)
1565 if (func == keyed_hash)
1567 if (func == yura_hash)
1569 if (func == r5_hash)
1572 BUG() ; // should never happen
1577 #define SWARN(silent, s, ...) \
1579 reiserfs_warning (s, __VA_ARGS__)
1581 static int reiserfs_fill_super (struct super_block * s, void * data, int silent)
1583 struct inode *root_inode;
1585 struct reiserfs_transaction_handle th ;
1587 unsigned long blocks;
1588 unsigned int commit_max_age = 0;
1589 int jinit_done = 0 ;
1590 struct reiserfs_iget_args args ;
1591 struct reiserfs_super_block * rs;
1593 struct reiserfs_sb_info *sbi;
1594 int errval = -EINVAL;
1596 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1602 memset (sbi, 0, sizeof (struct reiserfs_sb_info));
1603 /* Set default values for options: non-aggressive tails, RO on errors */
1604 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1605 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1606 /* no preallocation minimum, be smart in
1607 reiserfs_file_write instead */
1608 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1609 /* Preallocate by 16 blocks (17-1) at once */
1610 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1611 /* Initialize the rwsem for xattr dir */
1612 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1614 /* setup default block allocator options */
1615 reiserfs_init_alloc_options(s);
1618 if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) {
1623 SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1624 "for remount only");
1628 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1629 if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1631 /* try new format (64-th 1k block), which can contain reiserfs super block */
1632 else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1633 SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s));
1637 rs = SB_DISK_SUPER_BLOCK (s);
1638 /* Let's do basic sanity check to verify that underlying device is not
1639 smaller than the filesystem. If the check fails then abort and scream,
1640 because bad stuff will happen otherwise. */
1641 if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) {
1642 SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s));
1643 SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition");
1644 SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to");
1648 sbi->s_mount_state = SB_REISERFS_STATE(s);
1649 sbi->s_mount_state = REISERFS_VALID_FS ;
1651 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1652 SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1655 #ifdef CONFIG_REISERFS_CHECK
1656 SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON");
1657 SWARN (silent, s, "- it is slow mode for debugging.");
1660 /* make data=ordered the default */
1661 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1662 !reiserfs_data_writeback(s))
1664 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1667 if (reiserfs_data_log(s)) {
1668 reiserfs_info (s, "using journaled data mode\n");
1669 } else if (reiserfs_data_ordered(s)) {
1670 reiserfs_info (s, "using ordered data mode\n");
1672 reiserfs_info (s, "using writeback data mode\n");
1674 if (reiserfs_barrier_flush(s)) {
1675 printk("reiserfs: using flush barriers\n");
1678 // set_device_ro(s->s_dev, 1) ;
1679 if( journal_init(s, jdev_name, old_format, commit_max_age) ) {
1680 SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ;
1683 jinit_done = 1 ; /* once this is set, journal_release must be called
1684 ** if we error out of the mount
1687 if (reread_meta_blocks(s)) {
1688 SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ;
1692 if (replay_only (s))
1695 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1696 SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ;
1697 s->s_flags |= MS_RDONLY ;
1699 args.objectid = REISERFS_ROOT_OBJECTID ;
1700 args.dirid = REISERFS_ROOT_PARENT_OBJECTID ;
1701 root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
1703 SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed");
1707 if (root_inode->i_state & I_NEW) {
1708 reiserfs_read_locked_inode(root_inode, &args);
1709 unlock_new_inode(root_inode);
1712 s->s_root = d_alloc_root(root_inode);
1718 // define and initialize hash function
1719 sbi->s_hash_function = hash_function (s);
1720 if (sbi->s_hash_function == NULL) {
1726 if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1))
1727 set_bit(REISERFS_3_5, &(sbi->s_properties));
1729 set_bit(REISERFS_3_6, &(sbi->s_properties));
1731 if (!(s->s_flags & MS_RDONLY)) {
1733 errval = journal_begin(&th, s, 1) ;
1739 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1741 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1742 set_sb_fs_state (rs, 0);
1744 if (old_format_only(s)) {
1745 /* filesystem of format 3.5 either with standard or non-standard
1747 if (convert_reiserfs (s)) {
1748 /* and -o conv is given */
1750 reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ;
1752 if (is_reiserfs_3_5 (rs))
1753 /* put magic string of 3.6 format. 2.2 will not be able to
1754 mount this filesystem anymore */
1755 memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
1756 sizeof (reiserfs_3_6_magic_string));
1758 set_sb_version(rs,REISERFS_VERSION_2);
1759 reiserfs_convert_objectid_map_v1(s) ;
1760 set_bit(REISERFS_3_6, &(sbi->s_properties));
1761 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1762 } else if (!silent){
1763 reiserfs_info (s, "using 3.5.x disk format\n") ;
1767 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1768 errval = journal_end(&th, s, 1) ;
1775 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1781 /* look for files which were to be removed in previous session */
1782 finish_unfinished (s);
1784 if ( old_format_only(s) && !silent) {
1785 reiserfs_info (s, "using 3.5.x disk format\n") ;
1788 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1794 // mark hash in super block: it could be unset. overwrite should be ok
1795 set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) );
1799 reiserfs_proc_info_init( s );
1801 init_waitqueue_head (&(sbi->s_wait));
1802 spin_lock_init(&sbi->bitmap_lock);
1807 if (jinit_done) { /* kill the commit thread, free journal ram */
1808 journal_release_error(NULL, s) ;
1810 if (SB_DISK_SUPER_BLOCK (s)) {
1811 for (j = 0; j < SB_BMAP_NR (s); j ++) {
1812 if (SB_AP_BITMAP (s))
1813 brelse (SB_AP_BITMAP (s)[j].bh);
1815 if (SB_AP_BITMAP (s))
1816 vfree (SB_AP_BITMAP (s));
1818 if (SB_BUFFER_WITH_SB (s))
1819 brelse(SB_BUFFER_WITH_SB (s));
1821 for (j = 0; j < MAXQUOTAS; j++) {
1822 if (sbi->s_qf_names[j])
1823 kfree(sbi->s_qf_names[j]);
1830 s->s_fs_info = NULL;
1835 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf)
1837 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
1839 buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize));
1840 buf->f_bfree = sb_free_blocks(rs);
1841 buf->f_bavail = buf->f_bfree;
1842 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1843 buf->f_bsize = s->s_blocksize;
1844 /* changed to accommodate gcc folks.*/
1845 buf->f_type = REISERFS_SUPER_MAGIC;
1850 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1852 struct reiserfs_transaction_handle th;
1855 /* We may create quota structure so we need to reserve enough blocks */
1856 reiserfs_write_lock(inode->i_sb);
1857 ret = journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1860 ret = dquot_initialize(inode, type);
1861 err = journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1865 reiserfs_write_unlock(inode->i_sb);
1869 static int reiserfs_dquot_drop(struct inode *inode)
1871 struct reiserfs_transaction_handle th;
1874 /* We may delete quota structure so we need to reserve enough blocks */
1875 reiserfs_write_lock(inode->i_sb);
1876 ret = journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1879 ret = dquot_drop(inode);
1880 err = journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1884 reiserfs_write_unlock(inode->i_sb);
1888 static int reiserfs_write_dquot(struct dquot *dquot)
1890 struct reiserfs_transaction_handle th;
1893 reiserfs_write_lock(dquot->dq_sb);
1894 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1897 ret = dquot_commit(dquot);
1898 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1902 reiserfs_write_unlock(dquot->dq_sb);
1906 static int reiserfs_acquire_dquot(struct dquot *dquot)
1908 struct reiserfs_transaction_handle th;
1911 reiserfs_write_lock(dquot->dq_sb);
1912 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1915 ret = dquot_acquire(dquot);
1916 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1920 reiserfs_write_unlock(dquot->dq_sb);
1924 static int reiserfs_release_dquot(struct dquot *dquot)
1926 struct reiserfs_transaction_handle th;
1929 reiserfs_write_lock(dquot->dq_sb);
1930 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1933 ret = dquot_release(dquot);
1934 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1938 reiserfs_write_unlock(dquot->dq_sb);
1942 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1944 /* Are we journalling quotas? */
1945 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1946 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1947 dquot_mark_dquot_dirty(dquot);
1948 return reiserfs_write_dquot(dquot);
1951 return dquot_mark_dquot_dirty(dquot);
1954 static int reiserfs_write_info(struct super_block *sb, int type)
1956 struct reiserfs_transaction_handle th;
1959 /* Data block + inode block */
1960 reiserfs_write_lock(sb);
1961 ret = journal_begin(&th, sb, 2);
1964 ret = dquot_commit_info(sb, type);
1965 err = journal_end(&th, sb, 2);
1969 reiserfs_write_unlock(sb);
1974 * Turn on quotas during mount time - we need to find the quota file and such...
1976 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1978 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
1979 REISERFS_SB(sb)->s_jquota_fmt, type);
1983 * Standard function to be called on quota_on
1985 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
1988 struct nameidata nd;
1990 if (!(REISERFS_SB(sb)->s_mount_opt & (1<<REISERFS_QUOTA)))
1992 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
1995 /* Quotafile not on the same filesystem? */
1996 if (nd.mnt->mnt_sb != sb) {
2000 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2001 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2002 reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
2006 /* Not journalling quota? No more tests needed... */
2007 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2008 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2010 return vfs_quota_on(sb, type, format_id, path);
2012 /* Quotafile not of fs root? */
2013 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2014 reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
2015 "Journalled quota will not work.");
2017 return vfs_quota_on(sb, type, format_id, path);
2020 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2021 * acquiring the locks... As quota files are never truncated and quota code
2022 * itself serializes the operations (and noone else should touch the files)
2023 * we don't have to be afraid of races */
2024 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2025 size_t len, loff_t off)
2027 struct inode *inode = sb_dqopt(sb)->files[type];
2028 unsigned long blk = off >> sb->s_blocksize_bits;
2029 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2031 struct buffer_head tmp_bh, *bh;
2032 loff_t i_size = i_size_read(inode);
2036 if (off+len > i_size)
2039 while (toread > 0) {
2040 tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread;
2042 /* Quota files are without tails so we can safely use this function */
2043 reiserfs_write_lock(sb);
2044 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2045 reiserfs_write_unlock(sb);
2048 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2049 memset(data, 0, tocopy);
2051 bh = sb_bread(sb, tmp_bh.b_blocknr);
2054 memcpy(data, bh->b_data+offset, tocopy);
2065 /* Write to quotafile (we know the transaction is already started and has
2066 * enough credits) */
2067 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2068 const char *data, size_t len, loff_t off)
2070 struct inode *inode = sb_dqopt(sb)->files[type];
2071 unsigned long blk = off >> sb->s_blocksize_bits;
2072 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2073 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2074 size_t towrite = len;
2075 struct buffer_head tmp_bh, *bh;
2077 down(&inode->i_sem);
2078 while (towrite > 0) {
2079 tocopy = sb->s_blocksize - offset < towrite ?
2080 sb->s_blocksize - offset : towrite;
2082 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2085 if (offset || tocopy != sb->s_blocksize)
2086 bh = sb_bread(sb, tmp_bh.b_blocknr);
2088 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2094 memcpy(bh->b_data+offset, data, tocopy);
2095 flush_dcache_page(bh->b_page);
2096 set_buffer_uptodate(bh);
2098 reiserfs_prepare_for_journal(sb, bh, 1);
2099 journal_mark_dirty(current->journal_info, sb, bh);
2101 reiserfs_add_ordered_list(inode, bh);
2111 if (inode->i_size < off+len-towrite)
2112 i_size_write(inode, off+len-towrite);
2114 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2115 mark_inode_dirty(inode);
2117 return len - towrite;
2122 static struct super_block*
2123 get_super_block (struct file_system_type *fs_type, int flags,
2124 const char *dev_name, void *data)
2126 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2130 init_reiserfs_fs ( void )
2134 if ((ret = init_inodecache ())) {
2138 if ((ret = reiserfs_xattr_register_handlers ()))
2139 goto failed_reiserfs_xattr_register_handlers;
2141 reiserfs_proc_info_global_init ();
2142 reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc);
2144 ret = register_filesystem (& reiserfs_fs_type);
2150 reiserfs_xattr_unregister_handlers ();
2152 failed_reiserfs_xattr_register_handlers:
2153 reiserfs_proc_unregister_global ("version");
2154 reiserfs_proc_info_global_done ();
2155 destroy_inodecache ();
2161 exit_reiserfs_fs ( void )
2163 reiserfs_xattr_unregister_handlers ();
2164 reiserfs_proc_unregister_global ("version");
2165 reiserfs_proc_info_global_done ();
2166 unregister_filesystem (& reiserfs_fs_type);
2167 destroy_inodecache ();
2170 struct file_system_type reiserfs_fs_type = {
2171 .owner = THIS_MODULE,
2173 .get_sb = get_super_block,
2174 .kill_sb = kill_block_super,
2175 .fs_flags = FS_REQUIRES_DEV,
2178 MODULE_DESCRIPTION ("ReiserFS journaled filesystem");
2179 MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>");
2180 MODULE_LICENSE ("GPL");
2182 module_init (init_reiserfs_fs);
2183 module_exit (exit_reiserfs_fs);