2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
4 * Trivial changes by Alan Cox to add the LFS fixes
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/vmalloc.h>
17 #include <linux/time.h>
18 #include <linux/uaccess.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/backing-dev.h>
25 #include <linux/buffer_head.h>
26 #include <linux/exportfs.h>
27 #include <linux/quotaops.h>
28 #include <linux/vfs.h>
29 #include <linux/mount.h>
30 #include <linux/namei.h>
31 #include <linux/crc32.h>
32 #include <linux/seq_file.h>
34 struct file_system_type reiserfs_fs_type;
36 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
37 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
38 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
40 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
42 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
43 strlen(reiserfs_3_5_magic_string));
46 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
48 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
49 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));
58 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
60 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
64 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
65 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
67 static int reiserfs_sync_fs(struct super_block *s, int wait)
69 struct reiserfs_transaction_handle th;
72 * Writeback quota in non-journalled quota case - journalled quota has
75 dquot_writeback_dquots(s, -1);
76 reiserfs_write_lock(s);
77 if (!journal_begin(&th, s, 1))
78 if (!journal_end_sync(&th))
79 reiserfs_flush_old_commits(s);
80 reiserfs_write_unlock(s);
84 static void flush_old_commits(struct work_struct *work)
86 struct reiserfs_sb_info *sbi;
87 struct super_block *s;
89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
90 s = sbi->s_journal->j_work_sb;
93 * We need s_umount for protecting quota writeback. We have to use
94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work
95 * to complete with s_umount held.
97 if (!down_read_trylock(&s->s_umount)) {
98 /* Requeue work if we are not cancelling it */
99 spin_lock(&sbi->old_work_lock);
100 if (sbi->work_queued == 1)
101 queue_delayed_work(system_long_wq, &sbi->old_work, HZ);
102 spin_unlock(&sbi->old_work_lock);
105 spin_lock(&sbi->old_work_lock);
106 /* Avoid clobbering the cancel state... */
107 if (sbi->work_queued == 1)
108 sbi->work_queued = 0;
109 spin_unlock(&sbi->old_work_lock);
111 reiserfs_sync_fs(s, 1);
112 up_read(&s->s_umount);
115 void reiserfs_schedule_old_flush(struct super_block *s)
117 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
121 * Avoid scheduling flush when sb is being shut down. It can race
122 * with journal shutdown and free still queued delayed work.
124 if (sb_rdonly(s) || !(s->s_flags & MS_ACTIVE))
127 spin_lock(&sbi->old_work_lock);
128 if (!sbi->work_queued) {
129 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
130 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
131 sbi->work_queued = 1;
133 spin_unlock(&sbi->old_work_lock);
136 void reiserfs_cancel_old_flush(struct super_block *s)
138 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
140 spin_lock(&sbi->old_work_lock);
141 /* Make sure no new flushes will be queued */
142 sbi->work_queued = 2;
143 spin_unlock(&sbi->old_work_lock);
144 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
147 static int reiserfs_freeze(struct super_block *s)
149 struct reiserfs_transaction_handle th;
151 reiserfs_cancel_old_flush(s);
153 reiserfs_write_lock(s);
155 int err = journal_begin(&th, s, 1);
157 reiserfs_block_writes(&th);
159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
161 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
162 reiserfs_block_writes(&th);
163 journal_end_sync(&th);
166 reiserfs_write_unlock(s);
170 static int reiserfs_unfreeze(struct super_block *s)
172 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
174 reiserfs_allow_writes(s);
175 spin_lock(&sbi->old_work_lock);
176 /* Allow old_work to run again */
177 sbi->work_queued = 0;
178 spin_unlock(&sbi->old_work_lock);
182 extern const struct in_core_key MAX_IN_CORE_KEY;
185 * this is used to delete "save link" when there are no items of a
186 * file it points to. It can either happen if unlink is completed but
187 * "save unlink" removal, or if file has both unlink and truncate
188 * pending and as unlink completes first (because key of "save link"
189 * protecting unlink is bigger that a key lf "save link" which
190 * protects truncate), so there left no items to make truncate
193 static int remove_save_link_only(struct super_block *s,
194 struct reiserfs_key *key, int oid_free)
196 struct reiserfs_transaction_handle th;
199 /* we are going to do one balancing */
200 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
204 reiserfs_delete_solid_item(&th, NULL, key);
206 /* removals are protected by direct items */
207 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
209 return journal_end(&th);
213 static int reiserfs_quota_on_mount(struct super_block *, int);
217 * Look for uncompleted unlinks and truncates and complete them
219 * Called with superblock write locked. If quotas are enabled, we have to
220 * release/retake lest we call dquot_quota_on_mount(), proceed to
221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
222 * cpu worklets to complete flush_async_commits() that in turn wait for the
223 * superblock write lock.
225 static int finish_unfinished(struct super_block *s)
227 INITIALIZE_PATH(path);
228 struct cpu_key max_cpu_key, obj_key;
229 struct reiserfs_key save_link_key, last_inode_key;
231 struct item_head *ih;
232 struct buffer_head *bh;
241 int quota_enabled[REISERFS_MAXQUOTAS];
244 /* compose key to look for "save" links */
245 max_cpu_key.version = KEY_FORMAT_3_5;
246 max_cpu_key.on_disk_key.k_dir_id = ~0U;
247 max_cpu_key.on_disk_key.k_objectid = ~0U;
248 set_cpu_key_k_offset(&max_cpu_key, ~0U);
249 max_cpu_key.key_length = 3;
251 memset(&last_inode_key, 0, sizeof(last_inode_key));
254 /* Needed for iput() to work correctly and not trash data */
255 if (s->s_flags & MS_ACTIVE) {
259 s->s_flags |= MS_ACTIVE;
261 /* Turn on quotas so that they are updated correctly */
262 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
263 quota_enabled[i] = 1;
264 if (REISERFS_SB(s)->s_qf_names[i]) {
267 if (sb_has_quota_active(s, i)) {
268 quota_enabled[i] = 0;
271 reiserfs_write_unlock(s);
272 ret = reiserfs_quota_on_mount(s, i);
273 reiserfs_write_lock(s);
275 reiserfs_warning(s, "reiserfs-2500",
276 "cannot turn on journaled "
277 "quota: error %d", ret);
283 REISERFS_SB(s)->s_is_unlinked_ok = 1;
286 retval = search_item(s, &max_cpu_key, &path);
287 if (retval != ITEM_NOT_FOUND) {
288 reiserfs_error(s, "vs-2140",
289 "search_by_key returned %d", retval);
293 bh = get_last_bh(&path);
294 item_pos = get_item_pos(&path);
295 if (item_pos != B_NR_ITEMS(bh)) {
296 reiserfs_warning(s, "vs-2060",
297 "wrong position found");
301 ih = item_head(bh, item_pos);
303 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
304 /* there are no "save" links anymore */
307 save_link_key = ih->ih_key;
308 if (is_indirect_le_ih(ih))
313 /* reiserfs_iget needs k_dirid and k_objectid only */
314 item = ih_item_body(bh, ih);
315 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
316 obj_key.on_disk_key.k_objectid =
317 le32_to_cpu(ih->ih_key.k_objectid);
318 obj_key.on_disk_key.k_offset = 0;
319 obj_key.on_disk_key.k_type = 0;
323 inode = reiserfs_iget(s, &obj_key);
324 if (IS_ERR_OR_NULL(inode)) {
326 * the unlink almost completed, it just did not
327 * manage to remove "save" link and release objectid
329 reiserfs_warning(s, "vs-2180", "iget failed for %K",
331 retval = remove_save_link_only(s, &save_link_key, 1);
335 if (!truncate && inode->i_nlink) {
336 /* file is not unlinked */
337 reiserfs_warning(s, "vs-2185",
338 "file %K is not unlinked",
340 retval = remove_save_link_only(s, &save_link_key, 0);
343 depth = reiserfs_write_unlock_nested(inode->i_sb);
344 dquot_initialize(inode);
345 reiserfs_write_lock_nested(inode->i_sb, depth);
347 if (truncate && S_ISDIR(inode->i_mode)) {
349 * We got a truncate request for a dir which
350 * is impossible. The only imaginable way is to
351 * execute unfinished truncate request then boot
352 * into old kernel, remove the file and create dir
355 reiserfs_warning(s, "green-2101",
356 "impossible truncate on a "
357 "directory %k. Please report",
359 retval = remove_save_link_only(s, &save_link_key, 0);
366 REISERFS_I(inode)->i_flags |=
367 i_link_saved_truncate_mask;
369 * not completed truncate found. New size was
370 * committed together with "save" link
372 reiserfs_info(s, "Truncating %k to %lld ..",
373 INODE_PKEY(inode), inode->i_size);
375 /* don't update modification time */
376 reiserfs_truncate_file(inode, 0);
378 retval = remove_save_link(inode, truncate);
380 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
381 /* not completed unlink (rmdir) found */
382 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
383 if (memcmp(&last_inode_key, INODE_PKEY(inode),
384 sizeof(last_inode_key))){
385 last_inode_key = *INODE_PKEY(inode);
386 /* removal gets completed in iput */
389 reiserfs_warning(s, "super-2189", "Dead loop "
390 "in finish_unfinished "
391 "detected, just remove "
393 retval = remove_save_link_only(s,
402 REISERFS_SB(s)->s_is_unlinked_ok = 0;
405 /* Turn quotas off */
406 reiserfs_write_unlock(s);
407 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
408 if (sb_dqopt(s)->files[i] && quota_enabled[i])
409 dquot_quota_off(s, i);
411 reiserfs_write_lock(s);
413 /* Restore the flag back */
414 s->s_flags &= ~MS_ACTIVE;
418 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
419 "Completed\n", done);
424 * to protect file being unlinked from getting lost we "safe" link files
425 * being unlinked. This link will be deleted in the same transaction with last
426 * item of file. mounting the filesystem we scan all these links and remove
427 * files which almost got lost
429 void add_save_link(struct reiserfs_transaction_handle *th,
430 struct inode *inode, int truncate)
432 INITIALIZE_PATH(path);
438 BUG_ON(!th->t_trans_id);
440 /* file can only get one "save link" of each kind */
442 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
443 "saved link already exists for truncated inode %lx",
446 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
447 "saved link already exists for unlinked inode %lx",
450 /* setup key of "save" link */
451 key.version = KEY_FORMAT_3_5;
452 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
453 key.on_disk_key.k_objectid = inode->i_ino;
455 /* unlink, rmdir, rename */
456 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
457 set_cpu_key_k_type(&key, TYPE_DIRECT);
459 /* item head of "safe" link */
460 make_le_item_head(&ih, &key, key.version,
461 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
462 4 /*length */ , 0xffff /*free space */ );
465 if (S_ISDIR(inode->i_mode))
466 reiserfs_warning(inode->i_sb, "green-2102",
467 "Adding a truncate savelink for "
468 "a directory %k! Please report",
470 set_cpu_key_k_offset(&key, 1);
471 set_cpu_key_k_type(&key, TYPE_INDIRECT);
473 /* item head of "safe" link */
474 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
475 4 /*length */ , 0 /*free space */ );
479 /* look for its place in the tree */
480 retval = search_item(inode->i_sb, &key, &path);
481 if (retval != ITEM_NOT_FOUND) {
482 if (retval != -ENOSPC)
483 reiserfs_error(inode->i_sb, "vs-2100",
484 "search_by_key (%K) returned %d", &key,
490 /* body of "save" link */
491 link = INODE_PKEY(inode)->k_dir_id;
493 /* put "save" link into tree, don't charge quota to anyone */
495 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
497 if (retval != -ENOSPC)
498 reiserfs_error(inode->i_sb, "vs-2120",
499 "insert_item returned %d", retval);
502 REISERFS_I(inode)->i_flags |=
503 i_link_saved_truncate_mask;
505 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
509 /* this opens transaction unlike add_save_link */
510 int remove_save_link(struct inode *inode, int truncate)
512 struct reiserfs_transaction_handle th;
513 struct reiserfs_key key;
516 /* we are going to do one balancing only */
517 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
521 /* setup key of "save" link */
522 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
523 key.k_objectid = INODE_PKEY(inode)->k_objectid;
525 /* unlink, rmdir, rename */
526 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
527 1 + inode->i_sb->s_blocksize);
528 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
531 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
532 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
536 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
538 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
539 /* don't take quota bytes from anywhere */
540 reiserfs_delete_solid_item(&th, NULL, &key);
542 reiserfs_release_objectid(&th, inode->i_ino);
543 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
545 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
547 return journal_end(&th);
550 static void reiserfs_kill_sb(struct super_block *s)
552 if (REISERFS_SB(s)) {
553 reiserfs_proc_info_done(s);
555 * Force any pending inode evictions to occur now. Any
556 * inodes to be removed that have extended attributes
557 * associated with them need to clean them up before
558 * we can release the extended attribute root dentries.
559 * shrink_dcache_for_umount will BUG if we don't release
560 * those before it's called so ->put_super is too late.
564 dput(REISERFS_SB(s)->xattr_root);
565 REISERFS_SB(s)->xattr_root = NULL;
566 dput(REISERFS_SB(s)->priv_root);
567 REISERFS_SB(s)->priv_root = NULL;
574 static int reiserfs_quota_off(struct super_block *sb, int type);
576 static void reiserfs_quota_off_umount(struct super_block *s)
580 for (type = 0; type < REISERFS_MAXQUOTAS; type++)
581 reiserfs_quota_off(s, type);
584 static inline void reiserfs_quota_off_umount(struct super_block *s)
589 static void reiserfs_put_super(struct super_block *s)
591 struct reiserfs_transaction_handle th;
594 reiserfs_quota_off_umount(s);
596 reiserfs_write_lock(s);
599 * change file system state to current state if it was mounted
600 * with read-write permissions
603 if (!journal_begin(&th, s, 10)) {
604 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
606 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
607 REISERFS_SB(s)->s_mount_state);
608 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
613 * note, journal_release checks for readonly mount, and can
614 * decide not to do a journal_end
616 journal_release(&th, s);
618 reiserfs_free_bitmap_cache(s);
620 brelse(SB_BUFFER_WITH_SB(s));
624 if (REISERFS_SB(s)->reserved_blocks != 0) {
625 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
626 REISERFS_SB(s)->reserved_blocks);
629 reiserfs_write_unlock(s);
630 mutex_destroy(&REISERFS_SB(s)->lock);
631 destroy_workqueue(REISERFS_SB(s)->commit_wq);
632 kfree(REISERFS_SB(s)->s_jdev);
637 static struct kmem_cache *reiserfs_inode_cachep;
639 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
641 struct reiserfs_inode_info *ei;
642 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
645 atomic_set(&ei->openers, 0);
646 mutex_init(&ei->tailpack);
648 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
651 return &ei->vfs_inode;
654 static void reiserfs_i_callback(struct rcu_head *head)
656 struct inode *inode = container_of(head, struct inode, i_rcu);
657 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
660 static void reiserfs_destroy_inode(struct inode *inode)
662 call_rcu(&inode->i_rcu, reiserfs_i_callback);
665 static void init_once(void *foo)
667 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
669 INIT_LIST_HEAD(&ei->i_prealloc_list);
670 inode_init_once(&ei->vfs_inode);
673 static int __init init_inodecache(void)
675 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
677 reiserfs_inode_info),
678 0, (SLAB_RECLAIM_ACCOUNT|
682 if (reiserfs_inode_cachep == NULL)
687 static void destroy_inodecache(void)
690 * Make sure all delayed rcu free inodes are flushed before we
694 kmem_cache_destroy(reiserfs_inode_cachep);
697 /* we don't mark inodes dirty, we just log them */
698 static void reiserfs_dirty_inode(struct inode *inode, int flags)
700 struct reiserfs_transaction_handle th;
704 if (sb_rdonly(inode->i_sb)) {
705 reiserfs_warning(inode->i_sb, "clm-6006",
706 "writing inode %lu on readonly FS",
710 reiserfs_write_lock(inode->i_sb);
713 * this is really only used for atime updates, so they don't have
714 * to be included in O_SYNC or fsync
716 err = journal_begin(&th, inode->i_sb, 1);
720 reiserfs_update_sd(&th, inode);
724 reiserfs_write_unlock(inode->i_sb);
727 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
729 struct super_block *s = root->d_sb;
730 struct reiserfs_journal *journal = SB_JOURNAL(s);
731 long opts = REISERFS_SB(s)->s_mount_opt;
733 if (opts & (1 << REISERFS_LARGETAIL))
734 seq_puts(seq, ",tails=on");
735 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
736 seq_puts(seq, ",notail");
737 /* tails=small is default so we don't show it */
739 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
740 seq_puts(seq, ",barrier=none");
741 /* barrier=flush is default so we don't show it */
743 if (opts & (1 << REISERFS_ERROR_CONTINUE))
744 seq_puts(seq, ",errors=continue");
745 else if (opts & (1 << REISERFS_ERROR_PANIC))
746 seq_puts(seq, ",errors=panic");
747 /* errors=ro is default so we don't show it */
749 if (opts & (1 << REISERFS_DATA_LOG))
750 seq_puts(seq, ",data=journal");
751 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
752 seq_puts(seq, ",data=writeback");
753 /* data=ordered is default so we don't show it */
755 if (opts & (1 << REISERFS_ATTRS))
756 seq_puts(seq, ",attrs");
758 if (opts & (1 << REISERFS_XATTRS_USER))
759 seq_puts(seq, ",user_xattr");
761 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
762 seq_puts(seq, ",expose_privroot");
764 if (opts & (1 << REISERFS_POSIXACL))
765 seq_puts(seq, ",acl");
767 if (REISERFS_SB(s)->s_jdev)
768 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
770 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
771 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
774 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
775 seq_show_option(seq, "usrjquota",
776 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
777 else if (opts & (1 << REISERFS_USRQUOTA))
778 seq_puts(seq, ",usrquota");
779 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
780 seq_show_option(seq, "grpjquota",
781 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
782 else if (opts & (1 << REISERFS_GRPQUOTA))
783 seq_puts(seq, ",grpquota");
784 if (REISERFS_SB(s)->s_jquota_fmt) {
785 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
786 seq_puts(seq, ",jqfmt=vfsold");
787 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
788 seq_puts(seq, ",jqfmt=vfsv0");
792 /* Block allocator options */
793 if (opts & (1 << REISERFS_NO_BORDER))
794 seq_puts(seq, ",block-allocator=noborder");
795 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
796 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
797 if (opts & (1 << REISERFS_HASHED_RELOCATION))
798 seq_puts(seq, ",block-allocator=hashed_relocation");
799 if (opts & (1 << REISERFS_TEST4))
800 seq_puts(seq, ",block-allocator=test4");
801 show_alloc_options(seq, s);
806 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
808 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
811 static struct dquot **reiserfs_get_dquots(struct inode *inode)
813 return REISERFS_I(inode)->i_dquot;
817 static const struct super_operations reiserfs_sops = {
818 .alloc_inode = reiserfs_alloc_inode,
819 .destroy_inode = reiserfs_destroy_inode,
820 .write_inode = reiserfs_write_inode,
821 .dirty_inode = reiserfs_dirty_inode,
822 .evict_inode = reiserfs_evict_inode,
823 .put_super = reiserfs_put_super,
824 .sync_fs = reiserfs_sync_fs,
825 .freeze_fs = reiserfs_freeze,
826 .unfreeze_fs = reiserfs_unfreeze,
827 .statfs = reiserfs_statfs,
828 .remount_fs = reiserfs_remount,
829 .show_options = reiserfs_show_options,
831 .quota_read = reiserfs_quota_read,
832 .quota_write = reiserfs_quota_write,
833 .get_dquots = reiserfs_get_dquots,
838 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
840 static int reiserfs_write_dquot(struct dquot *);
841 static int reiserfs_acquire_dquot(struct dquot *);
842 static int reiserfs_release_dquot(struct dquot *);
843 static int reiserfs_mark_dquot_dirty(struct dquot *);
844 static int reiserfs_write_info(struct super_block *, int);
845 static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);
847 static const struct dquot_operations reiserfs_quota_operations = {
848 .write_dquot = reiserfs_write_dquot,
849 .acquire_dquot = reiserfs_acquire_dquot,
850 .release_dquot = reiserfs_release_dquot,
851 .mark_dirty = reiserfs_mark_dquot_dirty,
852 .write_info = reiserfs_write_info,
853 .alloc_dquot = dquot_alloc,
854 .destroy_dquot = dquot_destroy,
855 .get_next_id = dquot_get_next_id,
858 static const struct quotactl_ops reiserfs_qctl_operations = {
859 .quota_on = reiserfs_quota_on,
860 .quota_off = reiserfs_quota_off,
861 .quota_sync = dquot_quota_sync,
862 .get_state = dquot_get_state,
863 .set_info = dquot_set_dqinfo,
864 .get_dqblk = dquot_get_dqblk,
865 .set_dqblk = dquot_set_dqblk,
869 static const struct export_operations reiserfs_export_ops = {
870 .encode_fh = reiserfs_encode_fh,
871 .fh_to_dentry = reiserfs_fh_to_dentry,
872 .fh_to_parent = reiserfs_fh_to_parent,
873 .get_parent = reiserfs_get_parent,
877 * this struct is used in reiserfs_getopt () for containing the value for
878 * those mount options that have values rather than being toggles.
883 * bitmask which is to set on mount_options bitmask
884 * when this value is found, 0 is no bits are to be changed.
888 * bitmask which is to clear on mount_options bitmask
889 * when this value is found, 0 is no bits are to be changed.
890 * This is applied BEFORE setmask
895 /* Set this bit in arg_required to allow empty arguments */
896 #define REISERFS_OPT_ALLOWEMPTY 31
899 * this struct is used in reiserfs_getopt() for describing the
900 * set of reiserfs mount options
905 /* 0 if argument is not required, not 0 otherwise */
908 /* list of values accepted by an option */
909 const arg_desc_t *values;
912 * bitmask which is to set on mount_options bitmask
913 * when this value is found, 0 is no bits are to be changed.
918 * bitmask which is to clear on mount_options bitmask
919 * when this value is found, 0 is no bits are to be changed.
920 * This is applied BEFORE setmask
925 /* possible values for -o data= */
926 static const arg_desc_t logging_mode[] = {
927 {"ordered", 1 << REISERFS_DATA_ORDERED,
928 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
929 {"journal", 1 << REISERFS_DATA_LOG,
930 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
931 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
932 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
936 /* possible values for -o barrier= */
937 static const arg_desc_t barrier_mode[] = {
938 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
939 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
944 * possible values for "-o block-allocator=" and bits which are to be set in
945 * s_mount_opt of reiserfs specific part of in-core super block
947 static const arg_desc_t balloc[] = {
948 {"noborder", 1 << REISERFS_NO_BORDER, 0},
949 {"border", 0, 1 << REISERFS_NO_BORDER},
950 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
951 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
952 {"test4", 1 << REISERFS_TEST4, 0},
953 {"notest4", 0, 1 << REISERFS_TEST4},
957 static const arg_desc_t tails[] = {
958 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
959 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
960 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
964 static const arg_desc_t error_actions[] = {
965 {"panic", 1 << REISERFS_ERROR_PANIC,
966 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
967 {"ro-remount", 1 << REISERFS_ERROR_RO,
968 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
969 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
970 {"continue", 1 << REISERFS_ERROR_CONTINUE,
971 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
977 * proceed only one option from a list *cur - string containing of mount
979 * opts - array of options which are accepted
980 * opt_arg - if option is found and requires an argument and if it is specifed
981 * in the input - pointer to the argument is stored here
982 * bit_flags - if option requires to set a certain bit - it is set here
983 * return -1 if unknown option is found, opt->arg_required otherwise
985 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
986 char **opt_arg, unsigned long *bit_flags)
996 const opt_desc_t *opt;
997 const arg_desc_t *arg;
1001 /* assume argument cannot contain commas */
1002 *cur = strchr(p, ',');
1008 if (!strncmp(p, "alloc=", 6)) {
1010 * Ugly special case, probably we should redo options
1011 * parser so that it can understand several arguments for
1012 * some options, also so that it can fill several bitfields
1013 * with option values.
1015 if (reiserfs_parse_alloc_options(s, p + 6)) {
1022 /* for every option in the list */
1023 for (opt = opts; opt->option_name; opt++) {
1024 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
1027 (1 << REISERFS_UNSUPPORTED_OPT))
1028 reiserfs_warning(s, "super-6500",
1029 "%s not supported.\n",
1032 *bit_flags &= ~opt->clrmask;
1034 (1 << REISERFS_UNSUPPORTED_OPT))
1035 reiserfs_warning(s, "super-6501",
1036 "%s not supported.\n",
1039 *bit_flags |= opt->setmask;
1044 if (!opt->option_name) {
1045 reiserfs_warning(s, "super-6502",
1046 "unknown mount option \"%s\"", p);
1050 p += strlen(opt->option_name);
1053 if (!opt->arg_required) {
1054 reiserfs_warning(s, "super-6503",
1055 "the option \"%s\" does not "
1056 "require an argument\n",
1063 if (opt->arg_required) {
1064 reiserfs_warning(s, "super-6504",
1065 "the option \"%s\" requires an "
1066 "argument\n", opt->option_name);
1071 reiserfs_warning(s, "super-6505",
1072 "head of option \"%s\" is only correct\n",
1078 * move to the argument, or to next option if argument is not
1083 if (opt->arg_required
1084 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1086 /* this catches "option=," if not allowed */
1087 reiserfs_warning(s, "super-6506",
1088 "empty argument for \"%s\"\n",
1094 /* *=NULLopt_arg contains pointer to argument */
1096 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1099 /* values possible for this option are listed in opt->values */
1100 for (arg = opt->values; arg->value; arg++) {
1101 if (!strcmp(p, arg->value)) {
1103 *bit_flags &= ~arg->clrmask;
1104 *bit_flags |= arg->setmask;
1106 return opt->arg_required;
1110 reiserfs_warning(s, "super-6506",
1111 "bad value \"%s\" for option \"%s\"\n", p,
1116 /* returns 0 if something is wrong in option string, 1 - otherwise */
1117 static int reiserfs_parse_options(struct super_block *s,
1119 /* string given via mount's -o */
1123 * after the parsing phase, contains the
1124 * collection of bitflags defining what
1125 * mount options were selected.
1127 unsigned long *mount_options,
1129 /* strtol-ed from NNN of resize=NNN */
1130 unsigned long *blocks,
1132 unsigned int *commit_max_age,
1139 opt_desc_t opts[] = {
1141 * Compatibility stuff, so that -o notail for old
1144 {"tails",.arg_required = 't',.values = tails},
1145 {"notail",.clrmask =
1146 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1147 {"conv",.setmask = 1 << REISERFS_CONVERT},
1148 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1149 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1150 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1151 #ifdef CONFIG_REISERFS_FS_XATTR
1152 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1153 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1155 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1156 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1158 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1159 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1160 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1162 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1163 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1165 {.option_name = "nolog"},
1166 {"replayonly",.setmask = 1 << REPLAYONLY},
1167 {"block-allocator",.arg_required = 'a',.values = balloc},
1168 {"data",.arg_required = 'd',.values = logging_mode},
1169 {"barrier",.arg_required = 'b',.values = barrier_mode},
1170 {"resize",.arg_required = 'r',.values = NULL},
1171 {"jdev",.arg_required = 'j',.values = NULL},
1172 {"nolargeio",.arg_required = 'w',.values = NULL},
1173 {"commit",.arg_required = 'c',.values = NULL},
1174 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1175 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1176 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1177 {"errors",.arg_required = 'e',.values = error_actions},
1178 {"usrjquota",.arg_required =
1179 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1180 {"grpjquota",.arg_required =
1181 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1182 {"jqfmt",.arg_required = 'f',.values = NULL},
1183 {.option_name = NULL}
1187 if (!options || !*options)
1189 * use default configuration: create tails, journaling on, no
1190 * conversion to newest format
1194 for (pos = options; pos;) {
1195 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1197 /* wrong option is given */
1204 /* "resize=NNN" or "resize=auto" */
1206 if (!strcmp(arg, "auto")) {
1207 /* From JFS code, to auto-get the size. */
1209 i_size_read(s->s_bdev->bd_inode) >> s->
1212 *blocks = simple_strtoul(arg, &p, 0);
1214 /* NNN does not look like a number */
1215 reiserfs_warning(s, "super-6507",
1225 unsigned long val = simple_strtoul(arg, &p, 0);
1226 /* commit=NNN (time in seconds) */
1227 if (*p != '\0' || val >= (unsigned int)-1) {
1228 reiserfs_warning(s, "super-6508",
1229 "bad value %s for -ocommit\n",
1233 *commit_max_age = (unsigned int)val;
1237 reiserfs_warning(s, "super-6509", "nolargeio option "
1238 "is no longer supported");
1243 if (arg && *arg && jdev_name) {
1244 /* Hm, already assigned? */
1246 reiserfs_warning(s, "super-6510",
1247 "journal device was "
1248 "already specified to "
1249 "be %s", *jdev_name);
1256 if (c == 'u' || c == 'g') {
1257 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1259 if (sb_any_quota_loaded(s) &&
1260 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1261 reiserfs_warning(s, "super-6511",
1262 "cannot change journaled "
1263 "quota options when quota "
1267 if (qf_names[qtype] !=
1268 REISERFS_SB(s)->s_qf_names[qtype])
1269 kfree(qf_names[qtype]);
1270 qf_names[qtype] = NULL;
1271 if (*arg) { /* Some filename specified? */
1272 if (REISERFS_SB(s)->s_qf_names[qtype]
1273 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1275 reiserfs_warning(s, "super-6512",
1277 "already specified.",
1281 if (strchr(arg, '/')) {
1282 reiserfs_warning(s, "super-6513",
1283 "quotafile must be "
1284 "on filesystem root.");
1287 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1288 if (!qf_names[qtype]) {
1289 reiserfs_warning(s, "reiserfs-2502",
1290 "not enough memory "
1295 if (qtype == USRQUOTA)
1296 *mount_options |= 1 << REISERFS_USRQUOTA;
1298 *mount_options |= 1 << REISERFS_GRPQUOTA;
1300 if (qtype == USRQUOTA)
1301 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1303 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1307 if (!strcmp(arg, "vfsold"))
1308 *qfmt = QFMT_VFS_OLD;
1309 else if (!strcmp(arg, "vfsv0"))
1310 *qfmt = QFMT_VFS_V0;
1312 reiserfs_warning(s, "super-6514",
1313 "unknown quota format "
1317 if (sb_any_quota_loaded(s) &&
1318 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1319 reiserfs_warning(s, "super-6515",
1320 "cannot change journaled "
1321 "quota options when quota "
1327 if (c == 'u' || c == 'g' || c == 'f') {
1328 reiserfs_warning(s, "reiserfs-2503", "journaled "
1329 "quota options not supported.");
1336 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1337 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1338 reiserfs_warning(s, "super-6515",
1339 "journaled quota format not specified.");
1342 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1343 sb_has_quota_loaded(s, USRQUOTA)) ||
1344 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1345 sb_has_quota_loaded(s, GRPQUOTA))) {
1346 reiserfs_warning(s, "super-6516", "quota options must "
1347 "be present when quota is turned on.");
1355 static void switch_data_mode(struct super_block *s, unsigned long mode)
1357 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1358 (1 << REISERFS_DATA_ORDERED) |
1359 (1 << REISERFS_DATA_WRITEBACK));
1360 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1363 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1365 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1366 if (!reiserfs_data_log(s)) {
1367 switch_data_mode(s, REISERFS_DATA_LOG);
1368 reiserfs_info(s, "switching to journaled data mode\n");
1370 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1371 if (!reiserfs_data_ordered(s)) {
1372 switch_data_mode(s, REISERFS_DATA_ORDERED);
1373 reiserfs_info(s, "switching to ordered data mode\n");
1375 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1376 if (!reiserfs_data_writeback(s)) {
1377 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1378 reiserfs_info(s, "switching to writeback data mode\n");
1383 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1385 int flush = (1 << REISERFS_BARRIER_FLUSH);
1386 int none = (1 << REISERFS_BARRIER_NONE);
1387 int all_barrier = flush | none;
1389 if (bits & all_barrier) {
1390 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1392 REISERFS_SB(s)->s_mount_opt |= flush;
1393 printk("reiserfs: enabling write barrier flush mode\n");
1394 } else if (bits & none) {
1395 REISERFS_SB(s)->s_mount_opt |= none;
1396 printk("reiserfs: write barriers turned off\n");
1401 static void handle_attrs(struct super_block *s)
1403 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1405 if (reiserfs_attrs(s)) {
1406 if (old_format_only(s)) {
1407 reiserfs_warning(s, "super-6517", "cannot support "
1408 "attributes on 3.5.x disk format");
1409 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1412 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1413 reiserfs_warning(s, "super-6518", "cannot support "
1414 "attributes until flag is set in "
1416 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1422 static void handle_quota_files(struct super_block *s, char **qf_names,
1427 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1428 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1429 kfree(REISERFS_SB(s)->s_qf_names[i]);
1430 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1433 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1437 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1439 struct reiserfs_super_block *rs;
1440 struct reiserfs_transaction_handle th;
1441 unsigned long blocks;
1442 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1443 unsigned long safe_mask = 0;
1444 unsigned int commit_max_age = (unsigned int)-1;
1445 struct reiserfs_journal *journal = SB_JOURNAL(s);
1447 char *qf_names[REISERFS_MAXQUOTAS];
1448 unsigned int qfmt = 0;
1454 reiserfs_write_lock(s);
1457 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1460 rs = SB_DISK_SUPER_BLOCK(s);
1462 if (!reiserfs_parse_options
1463 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1466 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1467 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1471 goto out_err_unlock;
1474 handle_quota_files(s, qf_names, &qfmt);
1479 /* Add options that are safe here */
1480 safe_mask |= 1 << REISERFS_SMALLTAIL;
1481 safe_mask |= 1 << REISERFS_LARGETAIL;
1482 safe_mask |= 1 << REISERFS_NO_BORDER;
1483 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1484 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1485 safe_mask |= 1 << REISERFS_TEST4;
1486 safe_mask |= 1 << REISERFS_ATTRS;
1487 safe_mask |= 1 << REISERFS_XATTRS_USER;
1488 safe_mask |= 1 << REISERFS_POSIXACL;
1489 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1490 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1491 safe_mask |= 1 << REISERFS_ERROR_RO;
1492 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1493 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1494 safe_mask |= 1 << REISERFS_USRQUOTA;
1495 safe_mask |= 1 << REISERFS_GRPQUOTA;
1498 * Update the bitmask, taking care to keep
1499 * the bits we're not allowed to change here
1501 REISERFS_SB(s)->s_mount_opt =
1503 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1505 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1506 journal->j_max_commit_age = commit_max_age;
1507 journal->j_max_trans_age = commit_max_age;
1508 } else if (commit_max_age == 0) {
1509 /* 0 means restore defaults. */
1510 journal->j_max_commit_age = journal->j_default_max_commit_age;
1511 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1515 err = reiserfs_resize(s, blocks);
1517 goto out_err_unlock;
1520 if (*mount_flags & MS_RDONLY) {
1521 reiserfs_write_unlock(s);
1522 reiserfs_xattr_init(s, *mount_flags);
1523 /* remount read-only */
1525 /* it is read-only already */
1526 goto out_ok_unlocked;
1528 err = dquot_suspend(s, -1);
1532 /* try to remount file system with read-only permissions */
1533 if (sb_umount_state(rs) == REISERFS_VALID_FS
1534 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1535 goto out_ok_unlocked;
1538 reiserfs_write_lock(s);
1540 err = journal_begin(&th, s, 10);
1542 goto out_err_unlock;
1544 /* Mounting a rw partition read-only. */
1545 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1546 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1547 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1549 /* remount read-write */
1550 if (!sb_rdonly(s)) {
1551 reiserfs_write_unlock(s);
1552 reiserfs_xattr_init(s, *mount_flags);
1553 goto out_ok_unlocked; /* We are read-write already */
1556 if (reiserfs_is_journal_aborted(journal)) {
1557 err = journal->j_errno;
1558 goto out_err_unlock;
1561 handle_data_mode(s, mount_options);
1562 handle_barrier_mode(s, mount_options);
1563 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1565 /* now it is safe to call journal_begin */
1566 s->s_flags &= ~MS_RDONLY;
1567 err = journal_begin(&th, s, 10);
1569 goto out_err_unlock;
1571 /* Mount a partition which is read-only, read-write */
1572 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1573 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1574 s->s_flags &= ~MS_RDONLY;
1575 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1576 if (!old_format_only(s))
1577 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1578 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1579 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1580 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1582 /* this will force a full flush of all journal lists */
1583 SB_JOURNAL(s)->j_must_wait = 1;
1584 err = journal_end(&th);
1586 goto out_err_unlock;
1588 reiserfs_write_unlock(s);
1589 if (!(*mount_flags & MS_RDONLY)) {
1590 dquot_resume(s, -1);
1591 reiserfs_write_lock(s);
1592 finish_unfinished(s);
1593 reiserfs_write_unlock(s);
1594 reiserfs_xattr_init(s, *mount_flags);
1601 reiserfs_write_unlock(s);
1606 static int read_super_block(struct super_block *s, int offset)
1608 struct buffer_head *bh;
1609 struct reiserfs_super_block *rs;
1612 bh = sb_bread(s, offset / s->s_blocksize);
1614 reiserfs_warning(s, "sh-2006",
1615 "bread failed (dev %s, block %lu, size %lu)",
1616 s->s_id, offset / s->s_blocksize,
1621 rs = (struct reiserfs_super_block *)bh->b_data;
1622 if (!is_any_reiserfs_magic_string(rs)) {
1627 * ok, reiserfs signature (old or new) found in at the given offset
1629 fs_blocksize = sb_blocksize(rs);
1631 sb_set_blocksize(s, fs_blocksize);
1633 bh = sb_bread(s, offset / s->s_blocksize);
1635 reiserfs_warning(s, "sh-2007",
1636 "bread failed (dev %s, block %lu, size %lu)",
1637 s->s_id, offset / s->s_blocksize,
1642 rs = (struct reiserfs_super_block *)bh->b_data;
1643 if (sb_blocksize(rs) != s->s_blocksize) {
1644 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1645 "filesystem on (dev %s, block %llu, size %lu)",
1647 (unsigned long long)bh->b_blocknr,
1653 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1655 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1656 "--rebuild-tree run detected. Please run\n"
1657 "reiserfsck --rebuild-tree and wait for a "
1658 "completion. If that fails\n"
1659 "get newer reiserfsprogs package");
1663 SB_BUFFER_WITH_SB(s) = bh;
1664 SB_DISK_SUPER_BLOCK(s) = rs;
1667 * magic is of non-standard journal filesystem, look at s_version to
1668 * find which format is in use
1670 if (is_reiserfs_jr(rs)) {
1671 if (sb_version(rs) == REISERFS_VERSION_2)
1672 reiserfs_info(s, "found reiserfs format \"3.6\""
1673 " with non-standard journal\n");
1674 else if (sb_version(rs) == REISERFS_VERSION_1)
1675 reiserfs_info(s, "found reiserfs format \"3.5\""
1676 " with non-standard journal\n");
1678 reiserfs_warning(s, "sh-2012", "found unknown "
1679 "format \"%u\" of reiserfs with "
1680 "non-standard magic", sb_version(rs));
1685 * s_version of standard format may contain incorrect
1686 * information, so we just look at the magic string
1689 "found reiserfs format \"%s\" with standard journal\n",
1690 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1692 s->s_op = &reiserfs_sops;
1693 s->s_export_op = &reiserfs_export_ops;
1695 s->s_qcop = &reiserfs_qctl_operations;
1696 s->dq_op = &reiserfs_quota_operations;
1697 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1701 * new format is limited by the 32 bit wide i_blocks field, want to
1702 * be one full block below that.
1704 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1708 /* after journal replay, reread all bitmap and super blocks */
1709 static int reread_meta_blocks(struct super_block *s)
1711 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
1712 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1713 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1714 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1721 /* hash detection stuff */
1724 * if root directory is empty - we set default - Yura's - hash and
1726 * FIXME: we look for only one name in a directory. If tea and yura
1727 * both have the same value - we ask user to send report to the
1730 static __u32 find_hash_out(struct super_block *s)
1733 struct inode *inode;
1735 INITIALIZE_PATH(path);
1736 struct reiserfs_dir_entry de;
1737 struct reiserfs_de_head *deh;
1738 __u32 hash = DEFAULT_HASH;
1739 __u32 deh_hashval, teahash, r5hash, yurahash;
1741 inode = d_inode(s->s_root);
1743 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1744 retval = search_by_entry_key(s, &key, &path, &de);
1745 if (retval == IO_ERROR) {
1749 if (retval == NAME_NOT_FOUND)
1752 set_de_name_and_namelen(&de);
1753 deh = de.de_deh + de.de_entry_num;
1755 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1756 /* allow override in this case */
1757 if (reiserfs_rupasov_hash(s))
1759 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1763 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1764 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1765 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1766 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1768 if ((teahash == r5hash && deh_hashval == r5hash) ||
1769 (teahash == yurahash && deh_hashval == yurahash) ||
1770 (r5hash == yurahash && deh_hashval == yurahash)) {
1771 reiserfs_warning(s, "reiserfs-2506",
1772 "Unable to automatically detect hash "
1773 "function. Please mount with -o "
1774 "hash={tea,rupasov,r5}");
1779 if (deh_hashval == yurahash)
1781 else if (deh_hashval == teahash)
1783 else if (deh_hashval == r5hash)
1786 reiserfs_warning(s, "reiserfs-2506",
1787 "Unrecognised hash function");
1795 /* finds out which hash names are sorted with */
1796 static int what_hash(struct super_block *s)
1800 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1803 * reiserfs_hash_detect() == true if any of the hash mount options
1804 * were used. We must check them to make sure the user isn't
1805 * using a bad hash value
1807 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1808 code = find_hash_out(s);
1810 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1812 * detection has found the hash, and we must check against the
1815 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1816 reiserfs_warning(s, "reiserfs-2507",
1817 "Error, %s hash detected, "
1818 "unable to force rupasov hash",
1819 reiserfs_hashname(code));
1821 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1822 reiserfs_warning(s, "reiserfs-2508",
1823 "Error, %s hash detected, "
1824 "unable to force tea hash",
1825 reiserfs_hashname(code));
1827 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1828 reiserfs_warning(s, "reiserfs-2509",
1829 "Error, %s hash detected, "
1830 "unable to force r5 hash",
1831 reiserfs_hashname(code));
1836 * find_hash_out was not called or
1837 * could not determine the hash
1839 if (reiserfs_rupasov_hash(s)) {
1841 } else if (reiserfs_tea_hash(s)) {
1843 } else if (reiserfs_r5_hash(s)) {
1849 * if we are mounted RW, and we have a new valid hash code, update
1852 if (code != UNSET_HASH &&
1854 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1855 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1860 /* return pointer to appropriate function */
1861 static hashf_t hash_function(struct super_block *s)
1863 switch (what_hash(s)) {
1865 reiserfs_info(s, "Using tea hash to sort names\n");
1868 reiserfs_info(s, "Using rupasov hash to sort names\n");
1871 reiserfs_info(s, "Using r5 hash to sort names\n");
1877 /* this is used to set up correct value for old partitions */
1878 static int function2code(hashf_t func)
1880 if (func == keyed_hash)
1882 if (func == yura_hash)
1884 if (func == r5_hash)
1887 BUG(); /* should never happen */
1892 #define SWARN(silent, s, id, ...) \
1894 reiserfs_warning(s, id, __VA_ARGS__)
1896 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1898 struct inode *root_inode;
1899 struct reiserfs_transaction_handle th;
1901 unsigned long blocks;
1902 unsigned int commit_max_age = 0;
1904 struct reiserfs_iget_args args;
1905 struct reiserfs_super_block *rs;
1907 struct reiserfs_sb_info *sbi;
1908 int errval = -EINVAL;
1909 char *qf_names[REISERFS_MAXQUOTAS] = {};
1910 unsigned int qfmt = 0;
1912 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1916 /* Set default values for options: non-aggressive tails, RO on errors */
1917 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1918 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1919 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1920 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1921 sbi->s_alloc_options.preallocmin = 0;
1922 /* Preallocate by 16 blocks (17-1) at once */
1923 sbi->s_alloc_options.preallocsize = 17;
1924 /* setup default block allocator options */
1925 reiserfs_init_alloc_options(s);
1927 spin_lock_init(&sbi->old_work_lock);
1928 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1929 mutex_init(&sbi->lock);
1930 sbi->lock_depth = -1;
1932 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1934 if (!sbi->commit_wq) {
1935 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1937 goto error_unlocked;
1941 if (reiserfs_parse_options
1942 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1943 &commit_max_age, qf_names, &qfmt) == 0) {
1944 goto error_unlocked;
1946 if (jdev_name && jdev_name[0]) {
1947 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1949 SWARN(silent, s, "", "Cannot allocate memory for "
1950 "journal device name");
1951 goto error_unlocked;
1955 handle_quota_files(s, qf_names, &qfmt);
1959 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1960 goto error_unlocked;
1964 * try old format (undistributed bitmap, super block in 8-th 1k
1965 * block of a device)
1967 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1971 * try new format (64-th 1k block), which can contain reiserfs
1974 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1975 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1977 goto error_unlocked;
1980 rs = SB_DISK_SUPER_BLOCK(s);
1982 * Let's do basic sanity check to verify that underlying device is not
1983 * smaller than the filesystem. If the check fails then abort and
1984 * scream, because bad stuff will happen otherwise.
1986 if (s->s_bdev && s->s_bdev->bd_inode
1987 && i_size_read(s->s_bdev->bd_inode) <
1988 sb_block_count(rs) * sb_blocksize(rs)) {
1989 SWARN(silent, s, "", "Filesystem cannot be "
1990 "mounted because it is bigger than the device");
1991 SWARN(silent, s, "", "You may need to run fsck "
1992 "or increase size of your LVM partition");
1993 SWARN(silent, s, "", "Or may be you forgot to "
1994 "reboot after fdisk when it told you to");
1995 goto error_unlocked;
1998 sbi->s_mount_state = SB_REISERFS_STATE(s);
1999 sbi->s_mount_state = REISERFS_VALID_FS;
2001 if ((errval = reiserfs_init_bitmap_cache(s))) {
2002 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
2003 goto error_unlocked;
2007 #ifdef CONFIG_REISERFS_CHECK
2008 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
2009 SWARN(silent, s, "", "- it is slow mode for debugging.");
2012 /* make data=ordered the default */
2013 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
2014 !reiserfs_data_writeback(s)) {
2015 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
2018 if (reiserfs_data_log(s)) {
2019 reiserfs_info(s, "using journaled data mode\n");
2020 } else if (reiserfs_data_ordered(s)) {
2021 reiserfs_info(s, "using ordered data mode\n");
2023 reiserfs_info(s, "using writeback data mode\n");
2025 if (reiserfs_barrier_flush(s)) {
2026 printk("reiserfs: using flush barriers\n");
2029 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2030 SWARN(silent, s, "sh-2022",
2031 "unable to initialize journal space");
2032 goto error_unlocked;
2035 * once this is set, journal_release must be called
2036 * if we error out of the mount
2041 if (reread_meta_blocks(s)) {
2042 SWARN(silent, s, "jmacd-9",
2043 "unable to reread meta blocks after journal init");
2044 goto error_unlocked;
2048 goto error_unlocked;
2050 s->s_xattr = reiserfs_xattr_handlers;
2052 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) {
2053 SWARN(silent, s, "clm-7000",
2054 "Detected readonly device, marking FS readonly");
2055 s->s_flags |= MS_RDONLY;
2057 args.objectid = REISERFS_ROOT_OBJECTID;
2058 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2060 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2061 reiserfs_init_locked_inode, (void *)&args);
2063 SWARN(silent, s, "jmacd-10", "get root inode failed");
2064 goto error_unlocked;
2068 * This path assumed to be called with the BKL in the old times.
2069 * Now we have inherited the big reiserfs lock from it and many
2070 * reiserfs helpers called in the mount path and elsewhere require
2071 * this lock to be held even if it's not always necessary. Let's be
2072 * conservative and hold it early. The window can be reduced after
2073 * careful review of the code.
2075 reiserfs_write_lock(s);
2077 if (root_inode->i_state & I_NEW) {
2078 reiserfs_read_locked_inode(root_inode, &args);
2079 unlock_new_inode(root_inode);
2082 if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) ||
2083 !root_inode->i_size) {
2084 SWARN(silent, s, "", "corrupt root inode, run fsck");
2090 s->s_root = d_make_root(root_inode);
2093 /* define and initialize hash function */
2094 sbi->s_hash_function = hash_function(s);
2095 if (sbi->s_hash_function == NULL) {
2101 if (is_reiserfs_3_5(rs)
2102 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2103 set_bit(REISERFS_3_5, &sbi->s_properties);
2104 else if (old_format)
2105 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2107 set_bit(REISERFS_3_6, &sbi->s_properties);
2109 if (!sb_rdonly(s)) {
2111 errval = journal_begin(&th, s, 1);
2117 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2119 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2120 set_sb_fs_state(rs, 0);
2123 * Clear out s_bmap_nr if it would wrap. We can handle this
2124 * case, but older revisions can't. This will cause the
2125 * file system to fail mount on those older implementations,
2126 * avoiding corruption. -jeffm
2128 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2129 sb_bmap_nr(rs) != 0) {
2130 reiserfs_warning(s, "super-2030", "This file system "
2131 "claims to use %u bitmap blocks in "
2132 "its super block, but requires %u. "
2133 "Clearing to zero.", sb_bmap_nr(rs),
2134 reiserfs_bmap_count(s));
2136 set_sb_bmap_nr(rs, 0);
2139 if (old_format_only(s)) {
2141 * filesystem of format 3.5 either with standard
2142 * or non-standard journal
2144 if (convert_reiserfs(s)) {
2145 /* and -o conv is given */
2148 "converting 3.5 filesystem to the 3.6 format");
2150 if (is_reiserfs_3_5(rs))
2152 * put magic string of 3.6 format.
2153 * 2.2 will not be able to
2154 * mount this filesystem anymore
2156 memcpy(rs->s_v1.s_magic,
2157 reiserfs_3_6_magic_string,
2159 (reiserfs_3_6_magic_string));
2161 set_sb_version(rs, REISERFS_VERSION_2);
2162 reiserfs_convert_objectid_map_v1(s);
2163 set_bit(REISERFS_3_6, &sbi->s_properties);
2164 clear_bit(REISERFS_3_5, &sbi->s_properties);
2165 } else if (!silent) {
2166 reiserfs_info(s, "using 3.5.x disk format\n");
2169 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2172 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2173 errval = journal_end(&th);
2180 reiserfs_write_unlock(s);
2181 if ((errval = reiserfs_lookup_privroot(s)) ||
2182 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2185 goto error_unlocked;
2187 reiserfs_write_lock(s);
2190 * look for files which were to be removed in previous session
2192 finish_unfinished(s);
2194 if (old_format_only(s) && !silent) {
2195 reiserfs_info(s, "using 3.5.x disk format\n");
2198 reiserfs_write_unlock(s);
2199 if ((errval = reiserfs_lookup_privroot(s)) ||
2200 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2203 goto error_unlocked;
2205 reiserfs_write_lock(s);
2208 * mark hash in super block: it could be unset. overwrite should be ok
2210 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2214 reiserfs_proc_info_init(s);
2216 init_waitqueue_head(&(sbi->s_wait));
2217 spin_lock_init(&sbi->bitmap_lock);
2219 reiserfs_write_unlock(s);
2224 reiserfs_write_unlock(s);
2227 /* kill the commit thread, free journal ram */
2229 reiserfs_write_lock(s);
2230 journal_release_error(NULL, s);
2231 reiserfs_write_unlock(s);
2235 destroy_workqueue(sbi->commit_wq);
2237 reiserfs_cancel_old_flush(s);
2239 reiserfs_free_bitmap_cache(s);
2240 if (SB_BUFFER_WITH_SB(s))
2241 brelse(SB_BUFFER_WITH_SB(s));
2245 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2252 s->s_fs_info = NULL;
2256 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2258 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2260 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2261 buf->f_bfree = sb_free_blocks(rs);
2262 buf->f_bavail = buf->f_bfree;
2263 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2264 buf->f_bsize = dentry->d_sb->s_blocksize;
2265 /* changed to accommodate gcc folks. */
2266 buf->f_type = REISERFS_SUPER_MAGIC;
2267 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2268 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2269 sizeof(rs->s_uuid)/2);
2275 static int reiserfs_write_dquot(struct dquot *dquot)
2277 struct reiserfs_transaction_handle th;
2281 reiserfs_write_lock(dquot->dq_sb);
2283 journal_begin(&th, dquot->dq_sb,
2284 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2287 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2288 ret = dquot_commit(dquot);
2289 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2290 err = journal_end(&th);
2294 reiserfs_write_unlock(dquot->dq_sb);
2298 static int reiserfs_acquire_dquot(struct dquot *dquot)
2300 struct reiserfs_transaction_handle th;
2304 reiserfs_write_lock(dquot->dq_sb);
2306 journal_begin(&th, dquot->dq_sb,
2307 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2310 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2311 ret = dquot_acquire(dquot);
2312 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2313 err = journal_end(&th);
2317 reiserfs_write_unlock(dquot->dq_sb);
2321 static int reiserfs_release_dquot(struct dquot *dquot)
2323 struct reiserfs_transaction_handle th;
2326 reiserfs_write_lock(dquot->dq_sb);
2328 journal_begin(&th, dquot->dq_sb,
2329 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2330 reiserfs_write_unlock(dquot->dq_sb);
2332 /* Release dquot anyway to avoid endless cycle in dqput() */
2333 dquot_release(dquot);
2336 ret = dquot_release(dquot);
2337 reiserfs_write_lock(dquot->dq_sb);
2338 err = journal_end(&th);
2341 reiserfs_write_unlock(dquot->dq_sb);
2346 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2348 /* Are we journaling quotas? */
2349 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2350 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2351 dquot_mark_dquot_dirty(dquot);
2352 return reiserfs_write_dquot(dquot);
2354 return dquot_mark_dquot_dirty(dquot);
2357 static int reiserfs_write_info(struct super_block *sb, int type)
2359 struct reiserfs_transaction_handle th;
2363 /* Data block + inode block */
2364 reiserfs_write_lock(sb);
2365 ret = journal_begin(&th, sb, 2);
2368 depth = reiserfs_write_unlock_nested(sb);
2369 ret = dquot_commit_info(sb, type);
2370 reiserfs_write_lock_nested(sb, depth);
2371 err = journal_end(&th);
2375 reiserfs_write_unlock(sb);
2380 * Turn on quotas during mount time - we need to find the quota file and such...
2382 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2384 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2385 REISERFS_SB(sb)->s_jquota_fmt, type);
2389 * Standard function to be called on quota_on
2391 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2392 const struct path *path)
2395 struct inode *inode;
2396 struct reiserfs_transaction_handle th;
2397 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2399 reiserfs_write_lock(sb);
2400 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2405 /* Quotafile not on the same filesystem? */
2406 if (path->dentry->d_sb != sb) {
2410 inode = d_inode(path->dentry);
2412 * We must not pack tails for quota files on reiserfs for quota
2415 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2416 err = reiserfs_unpack(inode, NULL);
2418 reiserfs_warning(sb, "super-6520",
2419 "Unpacking tail of quota file failed"
2420 " (%d). Cannot turn on quotas.", err);
2424 mark_inode_dirty(inode);
2426 /* Journaling quota? */
2427 if (REISERFS_SB(sb)->s_qf_names[type]) {
2428 /* Quotafile not of fs root? */
2429 if (path->dentry->d_parent != sb->s_root)
2430 reiserfs_warning(sb, "super-6521",
2431 "Quota file not on filesystem root. "
2432 "Journalled quota will not work.");
2436 * When we journal data on quota file, we have to flush journal to see
2437 * all updates to the file when we bypass pagecache...
2439 if (reiserfs_file_data_log(inode)) {
2440 /* Just start temporary transaction and finish it */
2441 err = journal_begin(&th, sb, 1);
2444 err = journal_end_sync(&th);
2448 reiserfs_write_unlock(sb);
2449 err = dquot_quota_on(sb, type, format_id, path);
2452 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL |
2453 REISERFS_NOATIME_FL;
2454 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME,
2455 S_IMMUTABLE | S_NOATIME);
2456 inode_unlock(inode);
2457 mark_inode_dirty(inode);
2461 reiserfs_write_unlock(sb);
2465 static int reiserfs_quota_off(struct super_block *sb, int type)
2468 struct inode *inode = sb_dqopt(sb)->files[type];
2470 if (!inode || !igrab(inode))
2473 err = dquot_quota_off(sb, type);
2478 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL |
2479 REISERFS_NOATIME_FL);
2480 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME);
2481 inode_unlock(inode);
2482 mark_inode_dirty(inode);
2487 return dquot_quota_off(sb, type);
2491 * Read data from quotafile - avoid pagecache and such because we cannot afford
2492 * acquiring the locks... As quota files are never truncated and quota code
2493 * itself serializes the operations (and no one else should touch the files)
2494 * we don't have to be afraid of races
2496 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2497 size_t len, loff_t off)
2499 struct inode *inode = sb_dqopt(sb)->files[type];
2500 unsigned long blk = off >> sb->s_blocksize_bits;
2501 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2503 struct buffer_head tmp_bh, *bh;
2504 loff_t i_size = i_size_read(inode);
2508 if (off + len > i_size)
2511 while (toread > 0) {
2513 sb->s_blocksize - offset <
2514 toread ? sb->s_blocksize - offset : toread;
2517 * Quota files are without tails so we can safely
2520 reiserfs_write_lock(sb);
2521 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2522 reiserfs_write_unlock(sb);
2525 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2526 memset(data, 0, tocopy);
2528 bh = sb_bread(sb, tmp_bh.b_blocknr);
2531 memcpy(data, bh->b_data + offset, tocopy);
2543 * Write to quotafile (we know the transaction is already started and has
2546 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2547 const char *data, size_t len, loff_t off)
2549 struct inode *inode = sb_dqopt(sb)->files[type];
2550 unsigned long blk = off >> sb->s_blocksize_bits;
2551 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2552 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2553 size_t towrite = len;
2554 struct buffer_head tmp_bh, *bh;
2556 if (!current->journal_info) {
2557 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2558 (unsigned long long)off, (unsigned long long)len);
2561 while (towrite > 0) {
2562 tocopy = sb->s_blocksize - offset < towrite ?
2563 sb->s_blocksize - offset : towrite;
2565 reiserfs_write_lock(sb);
2566 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2567 reiserfs_write_unlock(sb);
2570 if (offset || tocopy != sb->s_blocksize)
2571 bh = sb_bread(sb, tmp_bh.b_blocknr);
2573 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2579 memcpy(bh->b_data + offset, data, tocopy);
2580 flush_dcache_page(bh->b_page);
2581 set_buffer_uptodate(bh);
2583 reiserfs_write_lock(sb);
2584 reiserfs_prepare_for_journal(sb, bh, 1);
2585 journal_mark_dirty(current->journal_info, bh);
2587 reiserfs_add_ordered_list(inode, bh);
2588 reiserfs_write_unlock(sb);
2598 if (inode->i_size < off + len - towrite)
2599 i_size_write(inode, off + len - towrite);
2600 inode->i_mtime = inode->i_ctime = current_time(inode);
2601 mark_inode_dirty(inode);
2602 return len - towrite;
2607 static struct dentry *get_super_block(struct file_system_type *fs_type,
2608 int flags, const char *dev_name,
2611 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2614 static int __init init_reiserfs_fs(void)
2618 ret = init_inodecache();
2622 reiserfs_proc_info_global_init();
2624 ret = register_filesystem(&reiserfs_fs_type);
2630 reiserfs_proc_info_global_done();
2631 destroy_inodecache();
2636 static void __exit exit_reiserfs_fs(void)
2638 reiserfs_proc_info_global_done();
2639 unregister_filesystem(&reiserfs_fs_type);
2640 destroy_inodecache();
2643 struct file_system_type reiserfs_fs_type = {
2644 .owner = THIS_MODULE,
2646 .mount = get_super_block,
2647 .kill_sb = reiserfs_kill_sb,
2648 .fs_flags = FS_REQUIRES_DEV,
2650 MODULE_ALIAS_FS("reiserfs");
2652 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2653 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2654 MODULE_LICENSE("GPL");
2656 module_init(init_reiserfs_fs);
2657 module_exit(exit_reiserfs_fs);