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;
92 spin_lock(&sbi->old_work_lock);
93 /* Avoid clobbering the cancel state... */
94 if (sbi->work_queued == 1)
96 spin_unlock(&sbi->old_work_lock);
98 reiserfs_sync_fs(s, 1);
101 void reiserfs_schedule_old_flush(struct super_block *s)
103 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
107 * Avoid scheduling flush when sb is being shut down. It can race
108 * with journal shutdown and free still queued delayed work.
110 if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
113 spin_lock(&sbi->old_work_lock);
114 if (!sbi->work_queued) {
115 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
116 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
117 sbi->work_queued = 1;
119 spin_unlock(&sbi->old_work_lock);
122 void reiserfs_cancel_old_flush(struct super_block *s)
124 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
126 spin_lock(&sbi->old_work_lock);
127 /* Make sure no new flushes will be queued */
128 sbi->work_queued = 2;
129 spin_unlock(&sbi->old_work_lock);
130 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
133 static int reiserfs_freeze(struct super_block *s)
135 struct reiserfs_transaction_handle th;
137 reiserfs_cancel_old_flush(s);
139 reiserfs_write_lock(s);
140 if (!(s->s_flags & MS_RDONLY)) {
141 int err = journal_begin(&th, s, 1);
143 reiserfs_block_writes(&th);
145 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
147 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
148 reiserfs_block_writes(&th);
149 journal_end_sync(&th);
152 reiserfs_write_unlock(s);
156 static int reiserfs_unfreeze(struct super_block *s)
158 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
160 reiserfs_allow_writes(s);
161 spin_lock(&sbi->old_work_lock);
162 /* Allow old_work to run again */
163 sbi->work_queued = 0;
164 spin_unlock(&sbi->old_work_lock);
168 extern const struct in_core_key MAX_IN_CORE_KEY;
171 * this is used to delete "save link" when there are no items of a
172 * file it points to. It can either happen if unlink is completed but
173 * "save unlink" removal, or if file has both unlink and truncate
174 * pending and as unlink completes first (because key of "save link"
175 * protecting unlink is bigger that a key lf "save link" which
176 * protects truncate), so there left no items to make truncate
179 static int remove_save_link_only(struct super_block *s,
180 struct reiserfs_key *key, int oid_free)
182 struct reiserfs_transaction_handle th;
185 /* we are going to do one balancing */
186 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
190 reiserfs_delete_solid_item(&th, NULL, key);
192 /* removals are protected by direct items */
193 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
195 return journal_end(&th);
199 static int reiserfs_quota_on_mount(struct super_block *, int);
203 * Look for uncompleted unlinks and truncates and complete them
205 * Called with superblock write locked. If quotas are enabled, we have to
206 * release/retake lest we call dquot_quota_on_mount(), proceed to
207 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
208 * cpu worklets to complete flush_async_commits() that in turn wait for the
209 * superblock write lock.
211 static int finish_unfinished(struct super_block *s)
213 INITIALIZE_PATH(path);
214 struct cpu_key max_cpu_key, obj_key;
215 struct reiserfs_key save_link_key, last_inode_key;
217 struct item_head *ih;
218 struct buffer_head *bh;
227 int quota_enabled[REISERFS_MAXQUOTAS];
230 /* compose key to look for "save" links */
231 max_cpu_key.version = KEY_FORMAT_3_5;
232 max_cpu_key.on_disk_key.k_dir_id = ~0U;
233 max_cpu_key.on_disk_key.k_objectid = ~0U;
234 set_cpu_key_k_offset(&max_cpu_key, ~0U);
235 max_cpu_key.key_length = 3;
237 memset(&last_inode_key, 0, sizeof(last_inode_key));
240 /* Needed for iput() to work correctly and not trash data */
241 if (s->s_flags & MS_ACTIVE) {
245 s->s_flags |= MS_ACTIVE;
247 /* Turn on quotas so that they are updated correctly */
248 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
249 quota_enabled[i] = 1;
250 if (REISERFS_SB(s)->s_qf_names[i]) {
253 if (sb_has_quota_active(s, i)) {
254 quota_enabled[i] = 0;
257 reiserfs_write_unlock(s);
258 ret = reiserfs_quota_on_mount(s, i);
259 reiserfs_write_lock(s);
261 reiserfs_warning(s, "reiserfs-2500",
262 "cannot turn on journaled "
263 "quota: error %d", ret);
269 REISERFS_SB(s)->s_is_unlinked_ok = 1;
272 retval = search_item(s, &max_cpu_key, &path);
273 if (retval != ITEM_NOT_FOUND) {
274 reiserfs_error(s, "vs-2140",
275 "search_by_key returned %d", retval);
279 bh = get_last_bh(&path);
280 item_pos = get_item_pos(&path);
281 if (item_pos != B_NR_ITEMS(bh)) {
282 reiserfs_warning(s, "vs-2060",
283 "wrong position found");
287 ih = item_head(bh, item_pos);
289 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
290 /* there are no "save" links anymore */
293 save_link_key = ih->ih_key;
294 if (is_indirect_le_ih(ih))
299 /* reiserfs_iget needs k_dirid and k_objectid only */
300 item = ih_item_body(bh, ih);
301 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
302 obj_key.on_disk_key.k_objectid =
303 le32_to_cpu(ih->ih_key.k_objectid);
304 obj_key.on_disk_key.k_offset = 0;
305 obj_key.on_disk_key.k_type = 0;
309 inode = reiserfs_iget(s, &obj_key);
310 if (IS_ERR_OR_NULL(inode)) {
312 * the unlink almost completed, it just did not
313 * manage to remove "save" link and release objectid
315 reiserfs_warning(s, "vs-2180", "iget failed for %K",
317 retval = remove_save_link_only(s, &save_link_key, 1);
321 if (!truncate && inode->i_nlink) {
322 /* file is not unlinked */
323 reiserfs_warning(s, "vs-2185",
324 "file %K is not unlinked",
326 retval = remove_save_link_only(s, &save_link_key, 0);
329 depth = reiserfs_write_unlock_nested(inode->i_sb);
330 dquot_initialize(inode);
331 reiserfs_write_lock_nested(inode->i_sb, depth);
333 if (truncate && S_ISDIR(inode->i_mode)) {
335 * We got a truncate request for a dir which
336 * is impossible. The only imaginable way is to
337 * execute unfinished truncate request then boot
338 * into old kernel, remove the file and create dir
341 reiserfs_warning(s, "green-2101",
342 "impossible truncate on a "
343 "directory %k. Please report",
345 retval = remove_save_link_only(s, &save_link_key, 0);
352 REISERFS_I(inode)->i_flags |=
353 i_link_saved_truncate_mask;
355 * not completed truncate found. New size was
356 * committed together with "save" link
358 reiserfs_info(s, "Truncating %k to %lld ..",
359 INODE_PKEY(inode), inode->i_size);
361 /* don't update modification time */
362 reiserfs_truncate_file(inode, 0);
364 retval = remove_save_link(inode, truncate);
366 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
367 /* not completed unlink (rmdir) found */
368 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
369 if (memcmp(&last_inode_key, INODE_PKEY(inode),
370 sizeof(last_inode_key))){
371 last_inode_key = *INODE_PKEY(inode);
372 /* removal gets completed in iput */
375 reiserfs_warning(s, "super-2189", "Dead loop "
376 "in finish_unfinished "
377 "detected, just remove "
379 retval = remove_save_link_only(s,
388 REISERFS_SB(s)->s_is_unlinked_ok = 0;
391 /* Turn quotas off */
392 reiserfs_write_unlock(s);
393 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
394 if (sb_dqopt(s)->files[i] && quota_enabled[i])
395 dquot_quota_off(s, i);
397 reiserfs_write_lock(s);
399 /* Restore the flag back */
400 s->s_flags &= ~MS_ACTIVE;
404 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
405 "Completed\n", done);
410 * to protect file being unlinked from getting lost we "safe" link files
411 * being unlinked. This link will be deleted in the same transaction with last
412 * item of file. mounting the filesystem we scan all these links and remove
413 * files which almost got lost
415 void add_save_link(struct reiserfs_transaction_handle *th,
416 struct inode *inode, int truncate)
418 INITIALIZE_PATH(path);
424 BUG_ON(!th->t_trans_id);
426 /* file can only get one "save link" of each kind */
428 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
429 "saved link already exists for truncated inode %lx",
432 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
433 "saved link already exists for unlinked inode %lx",
436 /* setup key of "save" link */
437 key.version = KEY_FORMAT_3_5;
438 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
439 key.on_disk_key.k_objectid = inode->i_ino;
441 /* unlink, rmdir, rename */
442 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
443 set_cpu_key_k_type(&key, TYPE_DIRECT);
445 /* item head of "safe" link */
446 make_le_item_head(&ih, &key, key.version,
447 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
448 4 /*length */ , 0xffff /*free space */ );
451 if (S_ISDIR(inode->i_mode))
452 reiserfs_warning(inode->i_sb, "green-2102",
453 "Adding a truncate savelink for "
454 "a directory %k! Please report",
456 set_cpu_key_k_offset(&key, 1);
457 set_cpu_key_k_type(&key, TYPE_INDIRECT);
459 /* item head of "safe" link */
460 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
461 4 /*length */ , 0 /*free space */ );
465 /* look for its place in the tree */
466 retval = search_item(inode->i_sb, &key, &path);
467 if (retval != ITEM_NOT_FOUND) {
468 if (retval != -ENOSPC)
469 reiserfs_error(inode->i_sb, "vs-2100",
470 "search_by_key (%K) returned %d", &key,
476 /* body of "save" link */
477 link = INODE_PKEY(inode)->k_dir_id;
479 /* put "save" link into tree, don't charge quota to anyone */
481 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
483 if (retval != -ENOSPC)
484 reiserfs_error(inode->i_sb, "vs-2120",
485 "insert_item returned %d", retval);
488 REISERFS_I(inode)->i_flags |=
489 i_link_saved_truncate_mask;
491 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
495 /* this opens transaction unlike add_save_link */
496 int remove_save_link(struct inode *inode, int truncate)
498 struct reiserfs_transaction_handle th;
499 struct reiserfs_key key;
502 /* we are going to do one balancing only */
503 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
507 /* setup key of "save" link */
508 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
509 key.k_objectid = INODE_PKEY(inode)->k_objectid;
511 /* unlink, rmdir, rename */
512 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
513 1 + inode->i_sb->s_blocksize);
514 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
517 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
518 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
522 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
524 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
525 /* don't take quota bytes from anywhere */
526 reiserfs_delete_solid_item(&th, NULL, &key);
528 reiserfs_release_objectid(&th, inode->i_ino);
529 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
531 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
533 return journal_end(&th);
536 static void reiserfs_kill_sb(struct super_block *s)
538 if (REISERFS_SB(s)) {
539 reiserfs_proc_info_done(s);
541 * Force any pending inode evictions to occur now. Any
542 * inodes to be removed that have extended attributes
543 * associated with them need to clean them up before
544 * we can release the extended attribute root dentries.
545 * shrink_dcache_for_umount will BUG if we don't release
546 * those before it's called so ->put_super is too late.
550 dput(REISERFS_SB(s)->xattr_root);
551 REISERFS_SB(s)->xattr_root = NULL;
552 dput(REISERFS_SB(s)->priv_root);
553 REISERFS_SB(s)->priv_root = NULL;
559 static void reiserfs_put_super(struct super_block *s)
561 struct reiserfs_transaction_handle th;
564 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
566 reiserfs_write_lock(s);
569 * change file system state to current state if it was mounted
570 * with read-write permissions
572 if (!(s->s_flags & MS_RDONLY)) {
573 if (!journal_begin(&th, s, 10)) {
574 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
576 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
577 REISERFS_SB(s)->s_mount_state);
578 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
583 * note, journal_release checks for readonly mount, and can
584 * decide not to do a journal_end
586 journal_release(&th, s);
588 reiserfs_free_bitmap_cache(s);
590 brelse(SB_BUFFER_WITH_SB(s));
594 if (REISERFS_SB(s)->reserved_blocks != 0) {
595 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
596 REISERFS_SB(s)->reserved_blocks);
599 reiserfs_write_unlock(s);
600 mutex_destroy(&REISERFS_SB(s)->lock);
601 destroy_workqueue(REISERFS_SB(s)->commit_wq);
602 kfree(REISERFS_SB(s)->s_jdev);
607 static struct kmem_cache *reiserfs_inode_cachep;
609 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
611 struct reiserfs_inode_info *ei;
612 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
615 atomic_set(&ei->openers, 0);
616 mutex_init(&ei->tailpack);
618 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
621 return &ei->vfs_inode;
624 static void reiserfs_i_callback(struct rcu_head *head)
626 struct inode *inode = container_of(head, struct inode, i_rcu);
627 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
630 static void reiserfs_destroy_inode(struct inode *inode)
632 call_rcu(&inode->i_rcu, reiserfs_i_callback);
635 static void init_once(void *foo)
637 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
639 INIT_LIST_HEAD(&ei->i_prealloc_list);
640 inode_init_once(&ei->vfs_inode);
643 static int __init init_inodecache(void)
645 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
647 reiserfs_inode_info),
648 0, (SLAB_RECLAIM_ACCOUNT|
652 if (reiserfs_inode_cachep == NULL)
657 static void destroy_inodecache(void)
660 * Make sure all delayed rcu free inodes are flushed before we
664 kmem_cache_destroy(reiserfs_inode_cachep);
667 /* we don't mark inodes dirty, we just log them */
668 static void reiserfs_dirty_inode(struct inode *inode, int flags)
670 struct reiserfs_transaction_handle th;
674 if (inode->i_sb->s_flags & MS_RDONLY) {
675 reiserfs_warning(inode->i_sb, "clm-6006",
676 "writing inode %lu on readonly FS",
680 reiserfs_write_lock(inode->i_sb);
683 * this is really only used for atime updates, so they don't have
684 * to be included in O_SYNC or fsync
686 err = journal_begin(&th, inode->i_sb, 1);
690 reiserfs_update_sd(&th, inode);
694 reiserfs_write_unlock(inode->i_sb);
697 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
699 struct super_block *s = root->d_sb;
700 struct reiserfs_journal *journal = SB_JOURNAL(s);
701 long opts = REISERFS_SB(s)->s_mount_opt;
703 if (opts & (1 << REISERFS_LARGETAIL))
704 seq_puts(seq, ",tails=on");
705 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
706 seq_puts(seq, ",notail");
707 /* tails=small is default so we don't show it */
709 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
710 seq_puts(seq, ",barrier=none");
711 /* barrier=flush is default so we don't show it */
713 if (opts & (1 << REISERFS_ERROR_CONTINUE))
714 seq_puts(seq, ",errors=continue");
715 else if (opts & (1 << REISERFS_ERROR_PANIC))
716 seq_puts(seq, ",errors=panic");
717 /* errors=ro is default so we don't show it */
719 if (opts & (1 << REISERFS_DATA_LOG))
720 seq_puts(seq, ",data=journal");
721 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
722 seq_puts(seq, ",data=writeback");
723 /* data=ordered is default so we don't show it */
725 if (opts & (1 << REISERFS_ATTRS))
726 seq_puts(seq, ",attrs");
728 if (opts & (1 << REISERFS_XATTRS_USER))
729 seq_puts(seq, ",user_xattr");
731 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
732 seq_puts(seq, ",expose_privroot");
734 if (opts & (1 << REISERFS_POSIXACL))
735 seq_puts(seq, ",acl");
737 if (REISERFS_SB(s)->s_jdev)
738 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
740 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
741 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
744 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
745 seq_show_option(seq, "usrjquota",
746 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
747 else if (opts & (1 << REISERFS_USRQUOTA))
748 seq_puts(seq, ",usrquota");
749 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
750 seq_show_option(seq, "grpjquota",
751 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
752 else if (opts & (1 << REISERFS_GRPQUOTA))
753 seq_puts(seq, ",grpquota");
754 if (REISERFS_SB(s)->s_jquota_fmt) {
755 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
756 seq_puts(seq, ",jqfmt=vfsold");
757 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
758 seq_puts(seq, ",jqfmt=vfsv0");
762 /* Block allocator options */
763 if (opts & (1 << REISERFS_NO_BORDER))
764 seq_puts(seq, ",block-allocator=noborder");
765 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
766 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
767 if (opts & (1 << REISERFS_HASHED_RELOCATION))
768 seq_puts(seq, ",block-allocator=hashed_relocation");
769 if (opts & (1 << REISERFS_TEST4))
770 seq_puts(seq, ",block-allocator=test4");
771 show_alloc_options(seq, s);
776 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
778 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
781 static struct dquot **reiserfs_get_dquots(struct inode *inode)
783 return REISERFS_I(inode)->i_dquot;
787 static const struct super_operations reiserfs_sops = {
788 .alloc_inode = reiserfs_alloc_inode,
789 .destroy_inode = reiserfs_destroy_inode,
790 .write_inode = reiserfs_write_inode,
791 .dirty_inode = reiserfs_dirty_inode,
792 .evict_inode = reiserfs_evict_inode,
793 .put_super = reiserfs_put_super,
794 .sync_fs = reiserfs_sync_fs,
795 .freeze_fs = reiserfs_freeze,
796 .unfreeze_fs = reiserfs_unfreeze,
797 .statfs = reiserfs_statfs,
798 .remount_fs = reiserfs_remount,
799 .show_options = reiserfs_show_options,
801 .quota_read = reiserfs_quota_read,
802 .quota_write = reiserfs_quota_write,
803 .get_dquots = reiserfs_get_dquots,
808 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
810 static int reiserfs_write_dquot(struct dquot *);
811 static int reiserfs_acquire_dquot(struct dquot *);
812 static int reiserfs_release_dquot(struct dquot *);
813 static int reiserfs_mark_dquot_dirty(struct dquot *);
814 static int reiserfs_write_info(struct super_block *, int);
815 static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
817 static const struct dquot_operations reiserfs_quota_operations = {
818 .write_dquot = reiserfs_write_dquot,
819 .acquire_dquot = reiserfs_acquire_dquot,
820 .release_dquot = reiserfs_release_dquot,
821 .mark_dirty = reiserfs_mark_dquot_dirty,
822 .write_info = reiserfs_write_info,
823 .alloc_dquot = dquot_alloc,
824 .destroy_dquot = dquot_destroy,
825 .get_next_id = dquot_get_next_id,
828 static const struct quotactl_ops reiserfs_qctl_operations = {
829 .quota_on = reiserfs_quota_on,
830 .quota_off = dquot_quota_off,
831 .quota_sync = dquot_quota_sync,
832 .get_state = dquot_get_state,
833 .set_info = dquot_set_dqinfo,
834 .get_dqblk = dquot_get_dqblk,
835 .set_dqblk = dquot_set_dqblk,
839 static const struct export_operations reiserfs_export_ops = {
840 .encode_fh = reiserfs_encode_fh,
841 .fh_to_dentry = reiserfs_fh_to_dentry,
842 .fh_to_parent = reiserfs_fh_to_parent,
843 .get_parent = reiserfs_get_parent,
847 * this struct is used in reiserfs_getopt () for containing the value for
848 * those mount options that have values rather than being toggles.
853 * bitmask which is to set on mount_options bitmask
854 * when this value is found, 0 is no bits are to be changed.
858 * bitmask which is to clear on mount_options bitmask
859 * when this value is found, 0 is no bits are to be changed.
860 * This is applied BEFORE setmask
865 /* Set this bit in arg_required to allow empty arguments */
866 #define REISERFS_OPT_ALLOWEMPTY 31
869 * this struct is used in reiserfs_getopt() for describing the
870 * set of reiserfs mount options
875 /* 0 if argument is not required, not 0 otherwise */
878 /* list of values accepted by an option */
879 const arg_desc_t *values;
882 * bitmask which is to set on mount_options bitmask
883 * 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 /* possible values for -o data= */
896 static const arg_desc_t logging_mode[] = {
897 {"ordered", 1 << REISERFS_DATA_ORDERED,
898 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
899 {"journal", 1 << REISERFS_DATA_LOG,
900 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
901 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
902 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
906 /* possible values for -o barrier= */
907 static const arg_desc_t barrier_mode[] = {
908 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
909 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
914 * possible values for "-o block-allocator=" and bits which are to be set in
915 * s_mount_opt of reiserfs specific part of in-core super block
917 static const arg_desc_t balloc[] = {
918 {"noborder", 1 << REISERFS_NO_BORDER, 0},
919 {"border", 0, 1 << REISERFS_NO_BORDER},
920 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
921 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
922 {"test4", 1 << REISERFS_TEST4, 0},
923 {"notest4", 0, 1 << REISERFS_TEST4},
927 static const arg_desc_t tails[] = {
928 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
929 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
930 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
934 static const arg_desc_t error_actions[] = {
935 {"panic", 1 << REISERFS_ERROR_PANIC,
936 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
937 {"ro-remount", 1 << REISERFS_ERROR_RO,
938 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
939 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
940 {"continue", 1 << REISERFS_ERROR_CONTINUE,
941 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
947 * proceed only one option from a list *cur - string containing of mount
949 * opts - array of options which are accepted
950 * opt_arg - if option is found and requires an argument and if it is specifed
951 * in the input - pointer to the argument is stored here
952 * bit_flags - if option requires to set a certain bit - it is set here
953 * return -1 if unknown option is found, opt->arg_required otherwise
955 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
956 char **opt_arg, unsigned long *bit_flags)
966 const opt_desc_t *opt;
967 const arg_desc_t *arg;
971 /* assume argument cannot contain commas */
972 *cur = strchr(p, ',');
978 if (!strncmp(p, "alloc=", 6)) {
980 * Ugly special case, probably we should redo options
981 * parser so that it can understand several arguments for
982 * some options, also so that it can fill several bitfields
983 * with option values.
985 if (reiserfs_parse_alloc_options(s, p + 6)) {
992 /* for every option in the list */
993 for (opt = opts; opt->option_name; opt++) {
994 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
997 (1 << REISERFS_UNSUPPORTED_OPT))
998 reiserfs_warning(s, "super-6500",
999 "%s not supported.\n",
1002 *bit_flags &= ~opt->clrmask;
1004 (1 << REISERFS_UNSUPPORTED_OPT))
1005 reiserfs_warning(s, "super-6501",
1006 "%s not supported.\n",
1009 *bit_flags |= opt->setmask;
1014 if (!opt->option_name) {
1015 reiserfs_warning(s, "super-6502",
1016 "unknown mount option \"%s\"", p);
1020 p += strlen(opt->option_name);
1023 if (!opt->arg_required) {
1024 reiserfs_warning(s, "super-6503",
1025 "the option \"%s\" does not "
1026 "require an argument\n",
1033 if (opt->arg_required) {
1034 reiserfs_warning(s, "super-6504",
1035 "the option \"%s\" requires an "
1036 "argument\n", opt->option_name);
1041 reiserfs_warning(s, "super-6505",
1042 "head of option \"%s\" is only correct\n",
1048 * move to the argument, or to next option if argument is not
1053 if (opt->arg_required
1054 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1056 /* this catches "option=," if not allowed */
1057 reiserfs_warning(s, "super-6506",
1058 "empty argument for \"%s\"\n",
1064 /* *=NULLopt_arg contains pointer to argument */
1066 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1069 /* values possible for this option are listed in opt->values */
1070 for (arg = opt->values; arg->value; arg++) {
1071 if (!strcmp(p, arg->value)) {
1073 *bit_flags &= ~arg->clrmask;
1074 *bit_flags |= arg->setmask;
1076 return opt->arg_required;
1080 reiserfs_warning(s, "super-6506",
1081 "bad value \"%s\" for option \"%s\"\n", p,
1086 /* returns 0 if something is wrong in option string, 1 - otherwise */
1087 static int reiserfs_parse_options(struct super_block *s,
1089 /* string given via mount's -o */
1093 * after the parsing phase, contains the
1094 * collection of bitflags defining what
1095 * mount options were selected.
1097 unsigned long *mount_options,
1099 /* strtol-ed from NNN of resize=NNN */
1100 unsigned long *blocks,
1102 unsigned int *commit_max_age,
1109 opt_desc_t opts[] = {
1111 * Compatibility stuff, so that -o notail for old
1114 {"tails",.arg_required = 't',.values = tails},
1115 {"notail",.clrmask =
1116 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1117 {"conv",.setmask = 1 << REISERFS_CONVERT},
1118 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1119 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1120 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1121 #ifdef CONFIG_REISERFS_FS_XATTR
1122 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1123 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1125 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1126 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1128 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1129 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1130 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1132 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1133 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1135 {.option_name = "nolog"},
1136 {"replayonly",.setmask = 1 << REPLAYONLY},
1137 {"block-allocator",.arg_required = 'a',.values = balloc},
1138 {"data",.arg_required = 'd',.values = logging_mode},
1139 {"barrier",.arg_required = 'b',.values = barrier_mode},
1140 {"resize",.arg_required = 'r',.values = NULL},
1141 {"jdev",.arg_required = 'j',.values = NULL},
1142 {"nolargeio",.arg_required = 'w',.values = NULL},
1143 {"commit",.arg_required = 'c',.values = NULL},
1144 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1145 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1146 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1147 {"errors",.arg_required = 'e',.values = error_actions},
1148 {"usrjquota",.arg_required =
1149 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1150 {"grpjquota",.arg_required =
1151 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1152 {"jqfmt",.arg_required = 'f',.values = NULL},
1153 {.option_name = NULL}
1157 if (!options || !*options)
1159 * use default configuration: create tails, journaling on, no
1160 * conversion to newest format
1164 for (pos = options; pos;) {
1165 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1167 /* wrong option is given */
1174 /* "resize=NNN" or "resize=auto" */
1176 if (!strcmp(arg, "auto")) {
1177 /* From JFS code, to auto-get the size. */
1179 s->s_bdev->bd_inode->i_size >> s->
1182 *blocks = simple_strtoul(arg, &p, 0);
1184 /* NNN does not look like a number */
1185 reiserfs_warning(s, "super-6507",
1195 unsigned long val = simple_strtoul(arg, &p, 0);
1196 /* commit=NNN (time in seconds) */
1197 if (*p != '\0' || val >= (unsigned int)-1) {
1198 reiserfs_warning(s, "super-6508",
1199 "bad value %s for -ocommit\n",
1203 *commit_max_age = (unsigned int)val;
1207 reiserfs_warning(s, "super-6509", "nolargeio option "
1208 "is no longer supported");
1213 if (arg && *arg && jdev_name) {
1214 /* Hm, already assigned? */
1216 reiserfs_warning(s, "super-6510",
1217 "journal device was "
1218 "already specified to "
1219 "be %s", *jdev_name);
1226 if (c == 'u' || c == 'g') {
1227 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1229 if (sb_any_quota_loaded(s) &&
1230 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1231 reiserfs_warning(s, "super-6511",
1232 "cannot change journaled "
1233 "quota options when quota "
1237 if (qf_names[qtype] !=
1238 REISERFS_SB(s)->s_qf_names[qtype])
1239 kfree(qf_names[qtype]);
1240 qf_names[qtype] = NULL;
1241 if (*arg) { /* Some filename specified? */
1242 if (REISERFS_SB(s)->s_qf_names[qtype]
1243 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1245 reiserfs_warning(s, "super-6512",
1247 "already specified.",
1251 if (strchr(arg, '/')) {
1252 reiserfs_warning(s, "super-6513",
1253 "quotafile must be "
1254 "on filesystem root.");
1257 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1258 if (!qf_names[qtype]) {
1259 reiserfs_warning(s, "reiserfs-2502",
1260 "not enough memory "
1265 if (qtype == USRQUOTA)
1266 *mount_options |= 1 << REISERFS_USRQUOTA;
1268 *mount_options |= 1 << REISERFS_GRPQUOTA;
1270 if (qtype == USRQUOTA)
1271 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1273 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1277 if (!strcmp(arg, "vfsold"))
1278 *qfmt = QFMT_VFS_OLD;
1279 else if (!strcmp(arg, "vfsv0"))
1280 *qfmt = QFMT_VFS_V0;
1282 reiserfs_warning(s, "super-6514",
1283 "unknown quota format "
1287 if (sb_any_quota_loaded(s) &&
1288 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1289 reiserfs_warning(s, "super-6515",
1290 "cannot change journaled "
1291 "quota options when quota "
1297 if (c == 'u' || c == 'g' || c == 'f') {
1298 reiserfs_warning(s, "reiserfs-2503", "journaled "
1299 "quota options not supported.");
1306 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1307 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1308 reiserfs_warning(s, "super-6515",
1309 "journaled quota format not specified.");
1312 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1313 sb_has_quota_loaded(s, USRQUOTA)) ||
1314 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1315 sb_has_quota_loaded(s, GRPQUOTA))) {
1316 reiserfs_warning(s, "super-6516", "quota options must "
1317 "be present when quota is turned on.");
1325 static void switch_data_mode(struct super_block *s, unsigned long mode)
1327 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1328 (1 << REISERFS_DATA_ORDERED) |
1329 (1 << REISERFS_DATA_WRITEBACK));
1330 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1333 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1335 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1336 if (!reiserfs_data_log(s)) {
1337 switch_data_mode(s, REISERFS_DATA_LOG);
1338 reiserfs_info(s, "switching to journaled data mode\n");
1340 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1341 if (!reiserfs_data_ordered(s)) {
1342 switch_data_mode(s, REISERFS_DATA_ORDERED);
1343 reiserfs_info(s, "switching to ordered data mode\n");
1345 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1346 if (!reiserfs_data_writeback(s)) {
1347 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1348 reiserfs_info(s, "switching to writeback data mode\n");
1353 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1355 int flush = (1 << REISERFS_BARRIER_FLUSH);
1356 int none = (1 << REISERFS_BARRIER_NONE);
1357 int all_barrier = flush | none;
1359 if (bits & all_barrier) {
1360 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1362 REISERFS_SB(s)->s_mount_opt |= flush;
1363 printk("reiserfs: enabling write barrier flush mode\n");
1364 } else if (bits & none) {
1365 REISERFS_SB(s)->s_mount_opt |= none;
1366 printk("reiserfs: write barriers turned off\n");
1371 static void handle_attrs(struct super_block *s)
1373 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1375 if (reiserfs_attrs(s)) {
1376 if (old_format_only(s)) {
1377 reiserfs_warning(s, "super-6517", "cannot support "
1378 "attributes on 3.5.x disk format");
1379 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1382 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1383 reiserfs_warning(s, "super-6518", "cannot support "
1384 "attributes until flag is set in "
1386 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1392 static void handle_quota_files(struct super_block *s, char **qf_names,
1397 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1398 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1399 kfree(REISERFS_SB(s)->s_qf_names[i]);
1400 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1403 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1407 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1409 struct reiserfs_super_block *rs;
1410 struct reiserfs_transaction_handle th;
1411 unsigned long blocks;
1412 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1413 unsigned long safe_mask = 0;
1414 unsigned int commit_max_age = (unsigned int)-1;
1415 struct reiserfs_journal *journal = SB_JOURNAL(s);
1418 char *qf_names[REISERFS_MAXQUOTAS];
1419 unsigned int qfmt = 0;
1424 new_opts = kstrdup(arg, GFP_KERNEL);
1425 if (arg && !new_opts)
1429 reiserfs_write_lock(s);
1432 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1435 rs = SB_DISK_SUPER_BLOCK(s);
1437 if (!reiserfs_parse_options
1438 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1441 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1442 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1446 goto out_err_unlock;
1449 handle_quota_files(s, qf_names, &qfmt);
1454 /* Add options that are safe here */
1455 safe_mask |= 1 << REISERFS_SMALLTAIL;
1456 safe_mask |= 1 << REISERFS_LARGETAIL;
1457 safe_mask |= 1 << REISERFS_NO_BORDER;
1458 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1459 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1460 safe_mask |= 1 << REISERFS_TEST4;
1461 safe_mask |= 1 << REISERFS_ATTRS;
1462 safe_mask |= 1 << REISERFS_XATTRS_USER;
1463 safe_mask |= 1 << REISERFS_POSIXACL;
1464 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1465 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1466 safe_mask |= 1 << REISERFS_ERROR_RO;
1467 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1468 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1469 safe_mask |= 1 << REISERFS_USRQUOTA;
1470 safe_mask |= 1 << REISERFS_GRPQUOTA;
1473 * Update the bitmask, taking care to keep
1474 * the bits we're not allowed to change here
1476 REISERFS_SB(s)->s_mount_opt =
1478 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1480 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1481 journal->j_max_commit_age = commit_max_age;
1482 journal->j_max_trans_age = commit_max_age;
1483 } else if (commit_max_age == 0) {
1484 /* 0 means restore defaults. */
1485 journal->j_max_commit_age = journal->j_default_max_commit_age;
1486 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1490 err = reiserfs_resize(s, blocks);
1492 goto out_err_unlock;
1495 if (*mount_flags & MS_RDONLY) {
1496 reiserfs_write_unlock(s);
1497 reiserfs_xattr_init(s, *mount_flags);
1498 /* remount read-only */
1499 if (s->s_flags & MS_RDONLY)
1500 /* it is read-only already */
1501 goto out_ok_unlocked;
1503 err = dquot_suspend(s, -1);
1507 /* try to remount file system with read-only permissions */
1508 if (sb_umount_state(rs) == REISERFS_VALID_FS
1509 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1510 goto out_ok_unlocked;
1513 reiserfs_write_lock(s);
1515 err = journal_begin(&th, s, 10);
1517 goto out_err_unlock;
1519 /* Mounting a rw partition read-only. */
1520 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1521 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1522 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1524 /* remount read-write */
1525 if (!(s->s_flags & MS_RDONLY)) {
1526 reiserfs_write_unlock(s);
1527 reiserfs_xattr_init(s, *mount_flags);
1528 goto out_ok_unlocked; /* We are read-write already */
1531 if (reiserfs_is_journal_aborted(journal)) {
1532 err = journal->j_errno;
1533 goto out_err_unlock;
1536 handle_data_mode(s, mount_options);
1537 handle_barrier_mode(s, mount_options);
1538 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1540 /* now it is safe to call journal_begin */
1541 s->s_flags &= ~MS_RDONLY;
1542 err = journal_begin(&th, s, 10);
1544 goto out_err_unlock;
1546 /* Mount a partition which is read-only, read-write */
1547 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1548 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1549 s->s_flags &= ~MS_RDONLY;
1550 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1551 if (!old_format_only(s))
1552 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1553 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1554 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1555 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1557 /* this will force a full flush of all journal lists */
1558 SB_JOURNAL(s)->j_must_wait = 1;
1559 err = journal_end(&th);
1561 goto out_err_unlock;
1563 reiserfs_write_unlock(s);
1564 if (!(*mount_flags & MS_RDONLY)) {
1565 dquot_resume(s, -1);
1566 reiserfs_write_lock(s);
1567 finish_unfinished(s);
1568 reiserfs_write_unlock(s);
1569 reiserfs_xattr_init(s, *mount_flags);
1574 replace_mount_options(s, new_opts);
1578 reiserfs_write_unlock(s);
1584 static int read_super_block(struct super_block *s, int offset)
1586 struct buffer_head *bh;
1587 struct reiserfs_super_block *rs;
1590 bh = sb_bread(s, offset / s->s_blocksize);
1592 reiserfs_warning(s, "sh-2006",
1593 "bread failed (dev %s, block %lu, size %lu)",
1594 s->s_id, offset / s->s_blocksize,
1599 rs = (struct reiserfs_super_block *)bh->b_data;
1600 if (!is_any_reiserfs_magic_string(rs)) {
1605 * ok, reiserfs signature (old or new) found in at the given offset
1607 fs_blocksize = sb_blocksize(rs);
1609 sb_set_blocksize(s, fs_blocksize);
1611 bh = sb_bread(s, offset / s->s_blocksize);
1613 reiserfs_warning(s, "sh-2007",
1614 "bread failed (dev %s, block %lu, size %lu)",
1615 s->s_id, offset / s->s_blocksize,
1620 rs = (struct reiserfs_super_block *)bh->b_data;
1621 if (sb_blocksize(rs) != s->s_blocksize) {
1622 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1623 "filesystem on (dev %s, block %llu, size %lu)",
1625 (unsigned long long)bh->b_blocknr,
1631 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1633 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1634 "--rebuild-tree run detected. Please run\n"
1635 "reiserfsck --rebuild-tree and wait for a "
1636 "completion. If that fails\n"
1637 "get newer reiserfsprogs package");
1641 SB_BUFFER_WITH_SB(s) = bh;
1642 SB_DISK_SUPER_BLOCK(s) = rs;
1645 * magic is of non-standard journal filesystem, look at s_version to
1646 * find which format is in use
1648 if (is_reiserfs_jr(rs)) {
1649 if (sb_version(rs) == REISERFS_VERSION_2)
1650 reiserfs_info(s, "found reiserfs format \"3.6\""
1651 " with non-standard journal\n");
1652 else if (sb_version(rs) == REISERFS_VERSION_1)
1653 reiserfs_info(s, "found reiserfs format \"3.5\""
1654 " with non-standard journal\n");
1656 reiserfs_warning(s, "sh-2012", "found unknown "
1657 "format \"%u\" of reiserfs with "
1658 "non-standard magic", sb_version(rs));
1663 * s_version of standard format may contain incorrect
1664 * information, so we just look at the magic string
1667 "found reiserfs format \"%s\" with standard journal\n",
1668 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1670 s->s_op = &reiserfs_sops;
1671 s->s_export_op = &reiserfs_export_ops;
1673 s->s_qcop = &reiserfs_qctl_operations;
1674 s->dq_op = &reiserfs_quota_operations;
1675 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1679 * new format is limited by the 32 bit wide i_blocks field, want to
1680 * be one full block below that.
1682 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1686 /* after journal replay, reread all bitmap and super blocks */
1687 static int reread_meta_blocks(struct super_block *s)
1689 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
1690 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1691 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1692 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1699 /* hash detection stuff */
1702 * if root directory is empty - we set default - Yura's - hash and
1704 * FIXME: we look for only one name in a directory. If tea and yura
1705 * both have the same value - we ask user to send report to the
1708 static __u32 find_hash_out(struct super_block *s)
1711 struct inode *inode;
1713 INITIALIZE_PATH(path);
1714 struct reiserfs_dir_entry de;
1715 struct reiserfs_de_head *deh;
1716 __u32 hash = DEFAULT_HASH;
1717 __u32 deh_hashval, teahash, r5hash, yurahash;
1719 inode = d_inode(s->s_root);
1721 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1722 retval = search_by_entry_key(s, &key, &path, &de);
1723 if (retval == IO_ERROR) {
1727 if (retval == NAME_NOT_FOUND)
1730 set_de_name_and_namelen(&de);
1731 deh = de.de_deh + de.de_entry_num;
1733 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1734 /* allow override in this case */
1735 if (reiserfs_rupasov_hash(s))
1737 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1741 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1742 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1743 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1744 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1746 if ((teahash == r5hash && deh_hashval == r5hash) ||
1747 (teahash == yurahash && deh_hashval == yurahash) ||
1748 (r5hash == yurahash && deh_hashval == yurahash)) {
1749 reiserfs_warning(s, "reiserfs-2506",
1750 "Unable to automatically detect hash "
1751 "function. Please mount with -o "
1752 "hash={tea,rupasov,r5}");
1757 if (deh_hashval == yurahash)
1759 else if (deh_hashval == teahash)
1761 else if (deh_hashval == r5hash)
1764 reiserfs_warning(s, "reiserfs-2506",
1765 "Unrecognised hash function");
1773 /* finds out which hash names are sorted with */
1774 static int what_hash(struct super_block *s)
1778 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1781 * reiserfs_hash_detect() == true if any of the hash mount options
1782 * were used. We must check them to make sure the user isn't
1783 * using a bad hash value
1785 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1786 code = find_hash_out(s);
1788 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1790 * detection has found the hash, and we must check against the
1793 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1794 reiserfs_warning(s, "reiserfs-2507",
1795 "Error, %s hash detected, "
1796 "unable to force rupasov hash",
1797 reiserfs_hashname(code));
1799 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1800 reiserfs_warning(s, "reiserfs-2508",
1801 "Error, %s hash detected, "
1802 "unable to force tea hash",
1803 reiserfs_hashname(code));
1805 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1806 reiserfs_warning(s, "reiserfs-2509",
1807 "Error, %s hash detected, "
1808 "unable to force r5 hash",
1809 reiserfs_hashname(code));
1814 * find_hash_out was not called or
1815 * could not determine the hash
1817 if (reiserfs_rupasov_hash(s)) {
1819 } else if (reiserfs_tea_hash(s)) {
1821 } else if (reiserfs_r5_hash(s)) {
1827 * if we are mounted RW, and we have a new valid hash code, update
1830 if (code != UNSET_HASH &&
1831 !(s->s_flags & MS_RDONLY) &&
1832 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1833 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1838 /* return pointer to appropriate function */
1839 static hashf_t hash_function(struct super_block *s)
1841 switch (what_hash(s)) {
1843 reiserfs_info(s, "Using tea hash to sort names\n");
1846 reiserfs_info(s, "Using rupasov hash to sort names\n");
1849 reiserfs_info(s, "Using r5 hash to sort names\n");
1855 /* this is used to set up correct value for old partitions */
1856 static int function2code(hashf_t func)
1858 if (func == keyed_hash)
1860 if (func == yura_hash)
1862 if (func == r5_hash)
1865 BUG(); /* should never happen */
1870 #define SWARN(silent, s, id, ...) \
1872 reiserfs_warning(s, id, __VA_ARGS__)
1874 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1876 struct inode *root_inode;
1877 struct reiserfs_transaction_handle th;
1879 unsigned long blocks;
1880 unsigned int commit_max_age = 0;
1882 struct reiserfs_iget_args args;
1883 struct reiserfs_super_block *rs;
1885 struct reiserfs_sb_info *sbi;
1886 int errval = -EINVAL;
1887 char *qf_names[REISERFS_MAXQUOTAS] = {};
1888 unsigned int qfmt = 0;
1890 save_mount_options(s, data);
1892 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1896 /* Set default values for options: non-aggressive tails, RO on errors */
1897 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1898 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1899 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1900 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1901 sbi->s_alloc_options.preallocmin = 0;
1902 /* Preallocate by 16 blocks (17-1) at once */
1903 sbi->s_alloc_options.preallocsize = 17;
1904 /* setup default block allocator options */
1905 reiserfs_init_alloc_options(s);
1907 spin_lock_init(&sbi->old_work_lock);
1908 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1909 mutex_init(&sbi->lock);
1910 sbi->lock_depth = -1;
1912 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1914 if (!sbi->commit_wq) {
1915 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1917 goto error_unlocked;
1921 if (reiserfs_parse_options
1922 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1923 &commit_max_age, qf_names, &qfmt) == 0) {
1924 goto error_unlocked;
1926 if (jdev_name && jdev_name[0]) {
1927 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1929 SWARN(silent, s, "", "Cannot allocate memory for "
1930 "journal device name");
1931 goto error_unlocked;
1935 handle_quota_files(s, qf_names, &qfmt);
1939 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1940 goto error_unlocked;
1944 * try old format (undistributed bitmap, super block in 8-th 1k
1945 * block of a device)
1947 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1951 * try new format (64-th 1k block), which can contain reiserfs
1954 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1955 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1957 goto error_unlocked;
1960 rs = SB_DISK_SUPER_BLOCK(s);
1962 * Let's do basic sanity check to verify that underlying device is not
1963 * smaller than the filesystem. If the check fails then abort and
1964 * scream, because bad stuff will happen otherwise.
1966 if (s->s_bdev && s->s_bdev->bd_inode
1967 && i_size_read(s->s_bdev->bd_inode) <
1968 sb_block_count(rs) * sb_blocksize(rs)) {
1969 SWARN(silent, s, "", "Filesystem cannot be "
1970 "mounted because it is bigger than the device");
1971 SWARN(silent, s, "", "You may need to run fsck "
1972 "or increase size of your LVM partition");
1973 SWARN(silent, s, "", "Or may be you forgot to "
1974 "reboot after fdisk when it told you to");
1975 goto error_unlocked;
1978 sbi->s_mount_state = SB_REISERFS_STATE(s);
1979 sbi->s_mount_state = REISERFS_VALID_FS;
1981 if ((errval = reiserfs_init_bitmap_cache(s))) {
1982 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1983 goto error_unlocked;
1987 #ifdef CONFIG_REISERFS_CHECK
1988 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1989 SWARN(silent, s, "", "- it is slow mode for debugging.");
1992 /* make data=ordered the default */
1993 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1994 !reiserfs_data_writeback(s)) {
1995 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1998 if (reiserfs_data_log(s)) {
1999 reiserfs_info(s, "using journaled data mode\n");
2000 } else if (reiserfs_data_ordered(s)) {
2001 reiserfs_info(s, "using ordered data mode\n");
2003 reiserfs_info(s, "using writeback data mode\n");
2005 if (reiserfs_barrier_flush(s)) {
2006 printk("reiserfs: using flush barriers\n");
2009 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2010 SWARN(silent, s, "sh-2022",
2011 "unable to initialize journal space");
2012 goto error_unlocked;
2015 * once this is set, journal_release must be called
2016 * if we error out of the mount
2021 if (reread_meta_blocks(s)) {
2022 SWARN(silent, s, "jmacd-9",
2023 "unable to reread meta blocks after journal init");
2024 goto error_unlocked;
2028 goto error_unlocked;
2030 s->s_xattr = reiserfs_xattr_handlers;
2032 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
2033 SWARN(silent, s, "clm-7000",
2034 "Detected readonly device, marking FS readonly");
2035 s->s_flags |= MS_RDONLY;
2037 args.objectid = REISERFS_ROOT_OBJECTID;
2038 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2040 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2041 reiserfs_init_locked_inode, (void *)&args);
2043 SWARN(silent, s, "jmacd-10", "get root inode failed");
2044 goto error_unlocked;
2048 * This path assumed to be called with the BKL in the old times.
2049 * Now we have inherited the big reiserfs lock from it and many
2050 * reiserfs helpers called in the mount path and elsewhere require
2051 * this lock to be held even if it's not always necessary. Let's be
2052 * conservative and hold it early. The window can be reduced after
2053 * careful review of the code.
2055 reiserfs_write_lock(s);
2057 if (root_inode->i_state & I_NEW) {
2058 reiserfs_read_locked_inode(root_inode, &args);
2059 unlock_new_inode(root_inode);
2062 if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) ||
2063 !root_inode->i_size) {
2064 SWARN(silent, s, "", "corrupt root inode, run fsck");
2070 s->s_root = d_make_root(root_inode);
2073 /* define and initialize hash function */
2074 sbi->s_hash_function = hash_function(s);
2075 if (sbi->s_hash_function == NULL) {
2081 if (is_reiserfs_3_5(rs)
2082 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2083 set_bit(REISERFS_3_5, &sbi->s_properties);
2084 else if (old_format)
2085 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2087 set_bit(REISERFS_3_6, &sbi->s_properties);
2089 if (!(s->s_flags & MS_RDONLY)) {
2091 errval = journal_begin(&th, s, 1);
2097 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2099 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2100 set_sb_fs_state(rs, 0);
2103 * Clear out s_bmap_nr if it would wrap. We can handle this
2104 * case, but older revisions can't. This will cause the
2105 * file system to fail mount on those older implementations,
2106 * avoiding corruption. -jeffm
2108 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2109 sb_bmap_nr(rs) != 0) {
2110 reiserfs_warning(s, "super-2030", "This file system "
2111 "claims to use %u bitmap blocks in "
2112 "its super block, but requires %u. "
2113 "Clearing to zero.", sb_bmap_nr(rs),
2114 reiserfs_bmap_count(s));
2116 set_sb_bmap_nr(rs, 0);
2119 if (old_format_only(s)) {
2121 * filesystem of format 3.5 either with standard
2122 * or non-standard journal
2124 if (convert_reiserfs(s)) {
2125 /* and -o conv is given */
2128 "converting 3.5 filesystem to the 3.6 format");
2130 if (is_reiserfs_3_5(rs))
2132 * put magic string of 3.6 format.
2133 * 2.2 will not be able to
2134 * mount this filesystem anymore
2136 memcpy(rs->s_v1.s_magic,
2137 reiserfs_3_6_magic_string,
2139 (reiserfs_3_6_magic_string));
2141 set_sb_version(rs, REISERFS_VERSION_2);
2142 reiserfs_convert_objectid_map_v1(s);
2143 set_bit(REISERFS_3_6, &sbi->s_properties);
2144 clear_bit(REISERFS_3_5, &sbi->s_properties);
2145 } else if (!silent) {
2146 reiserfs_info(s, "using 3.5.x disk format\n");
2149 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2152 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2153 errval = journal_end(&th);
2160 reiserfs_write_unlock(s);
2161 if ((errval = reiserfs_lookup_privroot(s)) ||
2162 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2165 goto error_unlocked;
2167 reiserfs_write_lock(s);
2170 * look for files which were to be removed in previous session
2172 finish_unfinished(s);
2174 if (old_format_only(s) && !silent) {
2175 reiserfs_info(s, "using 3.5.x disk format\n");
2178 reiserfs_write_unlock(s);
2179 if ((errval = reiserfs_lookup_privroot(s)) ||
2180 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2183 goto error_unlocked;
2185 reiserfs_write_lock(s);
2188 * mark hash in super block: it could be unset. overwrite should be ok
2190 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2194 reiserfs_proc_info_init(s);
2196 init_waitqueue_head(&(sbi->s_wait));
2197 spin_lock_init(&sbi->bitmap_lock);
2199 reiserfs_write_unlock(s);
2204 reiserfs_write_unlock(s);
2207 /* kill the commit thread, free journal ram */
2209 reiserfs_write_lock(s);
2210 journal_release_error(NULL, s);
2211 reiserfs_write_unlock(s);
2215 destroy_workqueue(sbi->commit_wq);
2217 reiserfs_cancel_old_flush(s);
2219 reiserfs_free_bitmap_cache(s);
2220 if (SB_BUFFER_WITH_SB(s))
2221 brelse(SB_BUFFER_WITH_SB(s));
2225 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2232 s->s_fs_info = NULL;
2236 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2238 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2240 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2241 buf->f_bfree = sb_free_blocks(rs);
2242 buf->f_bavail = buf->f_bfree;
2243 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2244 buf->f_bsize = dentry->d_sb->s_blocksize;
2245 /* changed to accommodate gcc folks. */
2246 buf->f_type = REISERFS_SUPER_MAGIC;
2247 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2248 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2249 sizeof(rs->s_uuid)/2);
2255 static int reiserfs_write_dquot(struct dquot *dquot)
2257 struct reiserfs_transaction_handle th;
2261 reiserfs_write_lock(dquot->dq_sb);
2263 journal_begin(&th, dquot->dq_sb,
2264 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2267 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2268 ret = dquot_commit(dquot);
2269 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2270 err = journal_end(&th);
2274 reiserfs_write_unlock(dquot->dq_sb);
2278 static int reiserfs_acquire_dquot(struct dquot *dquot)
2280 struct reiserfs_transaction_handle th;
2284 reiserfs_write_lock(dquot->dq_sb);
2286 journal_begin(&th, dquot->dq_sb,
2287 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2290 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2291 ret = dquot_acquire(dquot);
2292 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2293 err = journal_end(&th);
2297 reiserfs_write_unlock(dquot->dq_sb);
2301 static int reiserfs_release_dquot(struct dquot *dquot)
2303 struct reiserfs_transaction_handle th;
2306 reiserfs_write_lock(dquot->dq_sb);
2308 journal_begin(&th, dquot->dq_sb,
2309 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2310 reiserfs_write_unlock(dquot->dq_sb);
2312 /* Release dquot anyway to avoid endless cycle in dqput() */
2313 dquot_release(dquot);
2316 ret = dquot_release(dquot);
2317 reiserfs_write_lock(dquot->dq_sb);
2318 err = journal_end(&th);
2321 reiserfs_write_unlock(dquot->dq_sb);
2326 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2328 /* Are we journaling quotas? */
2329 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2330 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2331 dquot_mark_dquot_dirty(dquot);
2332 return reiserfs_write_dquot(dquot);
2334 return dquot_mark_dquot_dirty(dquot);
2337 static int reiserfs_write_info(struct super_block *sb, int type)
2339 struct reiserfs_transaction_handle th;
2343 /* Data block + inode block */
2344 reiserfs_write_lock(sb);
2345 ret = journal_begin(&th, sb, 2);
2348 depth = reiserfs_write_unlock_nested(sb);
2349 ret = dquot_commit_info(sb, type);
2350 reiserfs_write_lock_nested(sb, depth);
2351 err = journal_end(&th);
2355 reiserfs_write_unlock(sb);
2360 * Turn on quotas during mount time - we need to find the quota file and such...
2362 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2364 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2365 REISERFS_SB(sb)->s_jquota_fmt, type);
2369 * Standard function to be called on quota_on
2371 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2375 struct inode *inode;
2376 struct reiserfs_transaction_handle th;
2377 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2379 reiserfs_write_lock(sb);
2380 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2385 /* Quotafile not on the same filesystem? */
2386 if (path->dentry->d_sb != sb) {
2390 inode = d_inode(path->dentry);
2392 * We must not pack tails for quota files on reiserfs for quota
2395 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2396 err = reiserfs_unpack(inode, NULL);
2398 reiserfs_warning(sb, "super-6520",
2399 "Unpacking tail of quota file failed"
2400 " (%d). Cannot turn on quotas.", err);
2404 mark_inode_dirty(inode);
2406 /* Journaling quota? */
2407 if (REISERFS_SB(sb)->s_qf_names[type]) {
2408 /* Quotafile not of fs root? */
2409 if (path->dentry->d_parent != sb->s_root)
2410 reiserfs_warning(sb, "super-6521",
2411 "Quota file not on filesystem root. "
2412 "Journalled quota will not work.");
2416 * When we journal data on quota file, we have to flush journal to see
2417 * all updates to the file when we bypass pagecache...
2419 if (reiserfs_file_data_log(inode)) {
2420 /* Just start temporary transaction and finish it */
2421 err = journal_begin(&th, sb, 1);
2424 err = journal_end_sync(&th);
2428 reiserfs_write_unlock(sb);
2429 return dquot_quota_on(sb, type, format_id, path);
2431 reiserfs_write_unlock(sb);
2436 * Read data from quotafile - avoid pagecache and such because we cannot afford
2437 * acquiring the locks... As quota files are never truncated and quota code
2438 * itself serializes the operations (and no one else should touch the files)
2439 * we don't have to be afraid of races
2441 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2442 size_t len, loff_t off)
2444 struct inode *inode = sb_dqopt(sb)->files[type];
2445 unsigned long blk = off >> sb->s_blocksize_bits;
2446 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2448 struct buffer_head tmp_bh, *bh;
2449 loff_t i_size = i_size_read(inode);
2453 if (off + len > i_size)
2456 while (toread > 0) {
2458 sb->s_blocksize - offset <
2459 toread ? sb->s_blocksize - offset : toread;
2462 * Quota files are without tails so we can safely
2465 reiserfs_write_lock(sb);
2466 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2467 reiserfs_write_unlock(sb);
2470 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2471 memset(data, 0, tocopy);
2473 bh = sb_bread(sb, tmp_bh.b_blocknr);
2476 memcpy(data, bh->b_data + offset, tocopy);
2488 * Write to quotafile (we know the transaction is already started and has
2491 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2492 const char *data, size_t len, loff_t off)
2494 struct inode *inode = sb_dqopt(sb)->files[type];
2495 unsigned long blk = off >> sb->s_blocksize_bits;
2496 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2497 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2498 size_t towrite = len;
2499 struct buffer_head tmp_bh, *bh;
2501 if (!current->journal_info) {
2502 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2503 (unsigned long long)off, (unsigned long long)len);
2506 while (towrite > 0) {
2507 tocopy = sb->s_blocksize - offset < towrite ?
2508 sb->s_blocksize - offset : towrite;
2510 reiserfs_write_lock(sb);
2511 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2512 reiserfs_write_unlock(sb);
2515 if (offset || tocopy != sb->s_blocksize)
2516 bh = sb_bread(sb, tmp_bh.b_blocknr);
2518 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2524 memcpy(bh->b_data + offset, data, tocopy);
2525 flush_dcache_page(bh->b_page);
2526 set_buffer_uptodate(bh);
2528 reiserfs_write_lock(sb);
2529 reiserfs_prepare_for_journal(sb, bh, 1);
2530 journal_mark_dirty(current->journal_info, bh);
2532 reiserfs_add_ordered_list(inode, bh);
2533 reiserfs_write_unlock(sb);
2543 if (inode->i_size < off + len - towrite)
2544 i_size_write(inode, off + len - towrite);
2545 inode->i_mtime = inode->i_ctime = current_time(inode);
2546 mark_inode_dirty(inode);
2547 return len - towrite;
2552 static struct dentry *get_super_block(struct file_system_type *fs_type,
2553 int flags, const char *dev_name,
2556 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2559 static int __init init_reiserfs_fs(void)
2563 ret = init_inodecache();
2567 reiserfs_proc_info_global_init();
2569 ret = register_filesystem(&reiserfs_fs_type);
2575 reiserfs_proc_info_global_done();
2576 destroy_inodecache();
2581 static void __exit exit_reiserfs_fs(void)
2583 reiserfs_proc_info_global_done();
2584 unregister_filesystem(&reiserfs_fs_type);
2585 destroy_inodecache();
2588 struct file_system_type reiserfs_fs_type = {
2589 .owner = THIS_MODULE,
2591 .mount = get_super_block,
2592 .kill_sb = reiserfs_kill_sb,
2593 .fs_flags = FS_REQUIRES_DEV,
2595 MODULE_ALIAS_FS("reiserfs");
2597 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2598 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2599 MODULE_LICENSE("GPL");
2601 module_init(init_reiserfs_fs);
2602 module_exit(exit_reiserfs_fs);