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);
94 spin_unlock(&sbi->old_work_lock);
96 reiserfs_sync_fs(s, 1);
99 void reiserfs_schedule_old_flush(struct super_block *s)
101 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
105 * Avoid scheduling flush when sb is being shut down. It can race
106 * with journal shutdown and free still queued delayed work.
108 if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
111 spin_lock(&sbi->old_work_lock);
112 if (!sbi->work_queued) {
113 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
114 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
115 sbi->work_queued = 1;
117 spin_unlock(&sbi->old_work_lock);
120 static void cancel_old_flush(struct super_block *s)
122 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
124 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
125 spin_lock(&sbi->old_work_lock);
126 sbi->work_queued = 0;
127 spin_unlock(&sbi->old_work_lock);
130 static int reiserfs_freeze(struct super_block *s)
132 struct reiserfs_transaction_handle th;
136 reiserfs_write_lock(s);
137 if (!(s->s_flags & MS_RDONLY)) {
138 int err = journal_begin(&th, s, 1);
140 reiserfs_block_writes(&th);
142 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
144 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
145 reiserfs_block_writes(&th);
146 journal_end_sync(&th);
149 reiserfs_write_unlock(s);
153 static int reiserfs_unfreeze(struct super_block *s)
155 reiserfs_allow_writes(s);
159 extern const struct in_core_key MAX_IN_CORE_KEY;
162 * this is used to delete "save link" when there are no items of a
163 * file it points to. It can either happen if unlink is completed but
164 * "save unlink" removal, or if file has both unlink and truncate
165 * pending and as unlink completes first (because key of "save link"
166 * protecting unlink is bigger that a key lf "save link" which
167 * protects truncate), so there left no items to make truncate
170 static int remove_save_link_only(struct super_block *s,
171 struct reiserfs_key *key, int oid_free)
173 struct reiserfs_transaction_handle th;
176 /* we are going to do one balancing */
177 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
181 reiserfs_delete_solid_item(&th, NULL, key);
183 /* removals are protected by direct items */
184 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
186 return journal_end(&th);
190 static int reiserfs_quota_on_mount(struct super_block *, int);
193 /* look for uncompleted unlinks and truncates and complete them */
194 static int finish_unfinished(struct super_block *s)
196 INITIALIZE_PATH(path);
197 struct cpu_key max_cpu_key, obj_key;
198 struct reiserfs_key save_link_key, last_inode_key;
200 struct item_head *ih;
201 struct buffer_head *bh;
210 int quota_enabled[REISERFS_MAXQUOTAS];
213 /* compose key to look for "save" links */
214 max_cpu_key.version = KEY_FORMAT_3_5;
215 max_cpu_key.on_disk_key.k_dir_id = ~0U;
216 max_cpu_key.on_disk_key.k_objectid = ~0U;
217 set_cpu_key_k_offset(&max_cpu_key, ~0U);
218 max_cpu_key.key_length = 3;
220 memset(&last_inode_key, 0, sizeof(last_inode_key));
223 /* Needed for iput() to work correctly and not trash data */
224 if (s->s_flags & MS_ACTIVE) {
228 s->s_flags |= MS_ACTIVE;
230 /* Turn on quotas so that they are updated correctly */
231 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
232 quota_enabled[i] = 1;
233 if (REISERFS_SB(s)->s_qf_names[i]) {
236 if (sb_has_quota_active(s, i)) {
237 quota_enabled[i] = 0;
240 ret = reiserfs_quota_on_mount(s, i);
242 reiserfs_warning(s, "reiserfs-2500",
243 "cannot turn on journaled "
244 "quota: error %d", ret);
250 REISERFS_SB(s)->s_is_unlinked_ok = 1;
253 retval = search_item(s, &max_cpu_key, &path);
254 if (retval != ITEM_NOT_FOUND) {
255 reiserfs_error(s, "vs-2140",
256 "search_by_key returned %d", retval);
260 bh = get_last_bh(&path);
261 item_pos = get_item_pos(&path);
262 if (item_pos != B_NR_ITEMS(bh)) {
263 reiserfs_warning(s, "vs-2060",
264 "wrong position found");
268 ih = item_head(bh, item_pos);
270 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
271 /* there are no "save" links anymore */
274 save_link_key = ih->ih_key;
275 if (is_indirect_le_ih(ih))
280 /* reiserfs_iget needs k_dirid and k_objectid only */
281 item = ih_item_body(bh, ih);
282 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
283 obj_key.on_disk_key.k_objectid =
284 le32_to_cpu(ih->ih_key.k_objectid);
285 obj_key.on_disk_key.k_offset = 0;
286 obj_key.on_disk_key.k_type = 0;
290 inode = reiserfs_iget(s, &obj_key);
293 * the unlink almost completed, it just did not
294 * manage to remove "save" link and release objectid
296 reiserfs_warning(s, "vs-2180", "iget failed for %K",
298 retval = remove_save_link_only(s, &save_link_key, 1);
302 if (!truncate && inode->i_nlink) {
303 /* file is not unlinked */
304 reiserfs_warning(s, "vs-2185",
305 "file %K is not unlinked",
307 retval = remove_save_link_only(s, &save_link_key, 0);
310 depth = reiserfs_write_unlock_nested(inode->i_sb);
311 dquot_initialize(inode);
312 reiserfs_write_lock_nested(inode->i_sb, depth);
314 if (truncate && S_ISDIR(inode->i_mode)) {
316 * We got a truncate request for a dir which
317 * is impossible. The only imaginable way is to
318 * execute unfinished truncate request then boot
319 * into old kernel, remove the file and create dir
322 reiserfs_warning(s, "green-2101",
323 "impossible truncate on a "
324 "directory %k. Please report",
326 retval = remove_save_link_only(s, &save_link_key, 0);
333 REISERFS_I(inode)->i_flags |=
334 i_link_saved_truncate_mask;
336 * not completed truncate found. New size was
337 * committed together with "save" link
339 reiserfs_info(s, "Truncating %k to %lld ..",
340 INODE_PKEY(inode), inode->i_size);
342 /* don't update modification time */
343 reiserfs_truncate_file(inode, 0);
345 retval = remove_save_link(inode, truncate);
347 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
348 /* not completed unlink (rmdir) found */
349 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
350 if (memcmp(&last_inode_key, INODE_PKEY(inode),
351 sizeof(last_inode_key))){
352 last_inode_key = *INODE_PKEY(inode);
353 /* removal gets completed in iput */
356 reiserfs_warning(s, "super-2189", "Dead loop "
357 "in finish_unfinished "
358 "detected, just remove "
360 retval = remove_save_link_only(s,
369 REISERFS_SB(s)->s_is_unlinked_ok = 0;
372 /* Turn quotas off */
373 reiserfs_write_unlock(s);
374 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
375 if (sb_dqopt(s)->files[i] && quota_enabled[i])
376 dquot_quota_off(s, i);
378 reiserfs_write_lock(s);
380 /* Restore the flag back */
381 s->s_flags &= ~MS_ACTIVE;
385 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
386 "Completed\n", done);
391 * to protect file being unlinked from getting lost we "safe" link files
392 * being unlinked. This link will be deleted in the same transaction with last
393 * item of file. mounting the filesystem we scan all these links and remove
394 * files which almost got lost
396 void add_save_link(struct reiserfs_transaction_handle *th,
397 struct inode *inode, int truncate)
399 INITIALIZE_PATH(path);
405 BUG_ON(!th->t_trans_id);
407 /* file can only get one "save link" of each kind */
409 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
410 "saved link already exists for truncated inode %lx",
413 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
414 "saved link already exists for unlinked inode %lx",
417 /* setup key of "save" link */
418 key.version = KEY_FORMAT_3_5;
419 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
420 key.on_disk_key.k_objectid = inode->i_ino;
422 /* unlink, rmdir, rename */
423 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
424 set_cpu_key_k_type(&key, TYPE_DIRECT);
426 /* item head of "safe" link */
427 make_le_item_head(&ih, &key, key.version,
428 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
429 4 /*length */ , 0xffff /*free space */ );
432 if (S_ISDIR(inode->i_mode))
433 reiserfs_warning(inode->i_sb, "green-2102",
434 "Adding a truncate savelink for "
435 "a directory %k! Please report",
437 set_cpu_key_k_offset(&key, 1);
438 set_cpu_key_k_type(&key, TYPE_INDIRECT);
440 /* item head of "safe" link */
441 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
442 4 /*length */ , 0 /*free space */ );
446 /* look for its place in the tree */
447 retval = search_item(inode->i_sb, &key, &path);
448 if (retval != ITEM_NOT_FOUND) {
449 if (retval != -ENOSPC)
450 reiserfs_error(inode->i_sb, "vs-2100",
451 "search_by_key (%K) returned %d", &key,
457 /* body of "save" link */
458 link = INODE_PKEY(inode)->k_dir_id;
460 /* put "save" link into tree, don't charge quota to anyone */
462 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
464 if (retval != -ENOSPC)
465 reiserfs_error(inode->i_sb, "vs-2120",
466 "insert_item returned %d", retval);
469 REISERFS_I(inode)->i_flags |=
470 i_link_saved_truncate_mask;
472 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
476 /* this opens transaction unlike add_save_link */
477 int remove_save_link(struct inode *inode, int truncate)
479 struct reiserfs_transaction_handle th;
480 struct reiserfs_key key;
483 /* we are going to do one balancing only */
484 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
488 /* setup key of "save" link */
489 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
490 key.k_objectid = INODE_PKEY(inode)->k_objectid;
492 /* unlink, rmdir, rename */
493 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
494 1 + inode->i_sb->s_blocksize);
495 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
498 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
499 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
503 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
505 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
506 /* don't take quota bytes from anywhere */
507 reiserfs_delete_solid_item(&th, NULL, &key);
509 reiserfs_release_objectid(&th, inode->i_ino);
510 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
512 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
514 return journal_end(&th);
517 static void reiserfs_kill_sb(struct super_block *s)
519 if (REISERFS_SB(s)) {
520 reiserfs_proc_info_done(s);
522 * Force any pending inode evictions to occur now. Any
523 * inodes to be removed that have extended attributes
524 * associated with them need to clean them up before
525 * we can release the extended attribute root dentries.
526 * shrink_dcache_for_umount will BUG if we don't release
527 * those before it's called so ->put_super is too late.
531 dput(REISERFS_SB(s)->xattr_root);
532 REISERFS_SB(s)->xattr_root = NULL;
533 dput(REISERFS_SB(s)->priv_root);
534 REISERFS_SB(s)->priv_root = NULL;
540 static void reiserfs_put_super(struct super_block *s)
542 struct reiserfs_transaction_handle th;
545 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
547 reiserfs_write_lock(s);
550 * change file system state to current state if it was mounted
551 * with read-write permissions
553 if (!(s->s_flags & MS_RDONLY)) {
554 if (!journal_begin(&th, s, 10)) {
555 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
557 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
558 REISERFS_SB(s)->s_mount_state);
559 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
564 * note, journal_release checks for readonly mount, and can
565 * decide not to do a journal_end
567 journal_release(&th, s);
569 reiserfs_free_bitmap_cache(s);
571 brelse(SB_BUFFER_WITH_SB(s));
575 if (REISERFS_SB(s)->reserved_blocks != 0) {
576 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
577 REISERFS_SB(s)->reserved_blocks);
580 reiserfs_write_unlock(s);
581 mutex_destroy(&REISERFS_SB(s)->lock);
582 destroy_workqueue(REISERFS_SB(s)->commit_wq);
587 static struct kmem_cache *reiserfs_inode_cachep;
589 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
591 struct reiserfs_inode_info *ei;
592 ei = (struct reiserfs_inode_info *)
593 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
596 atomic_set(&ei->openers, 0);
597 mutex_init(&ei->tailpack);
599 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
602 return &ei->vfs_inode;
605 static void reiserfs_i_callback(struct rcu_head *head)
607 struct inode *inode = container_of(head, struct inode, i_rcu);
608 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
611 static void reiserfs_destroy_inode(struct inode *inode)
613 call_rcu(&inode->i_rcu, reiserfs_i_callback);
616 static void init_once(void *foo)
618 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
620 INIT_LIST_HEAD(&ei->i_prealloc_list);
621 inode_init_once(&ei->vfs_inode);
624 static int __init init_inodecache(void)
626 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
628 reiserfs_inode_info),
629 0, (SLAB_RECLAIM_ACCOUNT|
632 if (reiserfs_inode_cachep == NULL)
637 static void destroy_inodecache(void)
640 * Make sure all delayed rcu free inodes are flushed before we
644 kmem_cache_destroy(reiserfs_inode_cachep);
647 /* we don't mark inodes dirty, we just log them */
648 static void reiserfs_dirty_inode(struct inode *inode, int flags)
650 struct reiserfs_transaction_handle th;
654 if (inode->i_sb->s_flags & MS_RDONLY) {
655 reiserfs_warning(inode->i_sb, "clm-6006",
656 "writing inode %lu on readonly FS",
660 reiserfs_write_lock(inode->i_sb);
663 * this is really only used for atime updates, so they don't have
664 * to be included in O_SYNC or fsync
666 err = journal_begin(&th, inode->i_sb, 1);
670 reiserfs_update_sd(&th, inode);
674 reiserfs_write_unlock(inode->i_sb);
677 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
679 struct super_block *s = root->d_sb;
680 struct reiserfs_journal *journal = SB_JOURNAL(s);
681 long opts = REISERFS_SB(s)->s_mount_opt;
683 if (opts & (1 << REISERFS_LARGETAIL))
684 seq_puts(seq, ",tails=on");
685 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
686 seq_puts(seq, ",notail");
687 /* tails=small is default so we don't show it */
689 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
690 seq_puts(seq, ",barrier=none");
691 /* barrier=flush is default so we don't show it */
693 if (opts & (1 << REISERFS_ERROR_CONTINUE))
694 seq_puts(seq, ",errors=continue");
695 else if (opts & (1 << REISERFS_ERROR_PANIC))
696 seq_puts(seq, ",errors=panic");
697 /* errors=ro is default so we don't show it */
699 if (opts & (1 << REISERFS_DATA_LOG))
700 seq_puts(seq, ",data=journal");
701 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
702 seq_puts(seq, ",data=writeback");
703 /* data=ordered is default so we don't show it */
705 if (opts & (1 << REISERFS_ATTRS))
706 seq_puts(seq, ",attrs");
708 if (opts & (1 << REISERFS_XATTRS_USER))
709 seq_puts(seq, ",user_xattr");
711 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
712 seq_puts(seq, ",expose_privroot");
714 if (opts & (1 << REISERFS_POSIXACL))
715 seq_puts(seq, ",acl");
717 if (REISERFS_SB(s)->s_jdev)
718 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
720 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
721 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
724 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
725 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
726 else if (opts & (1 << REISERFS_USRQUOTA))
727 seq_puts(seq, ",usrquota");
728 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
729 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
730 else if (opts & (1 << REISERFS_GRPQUOTA))
731 seq_puts(seq, ",grpquota");
732 if (REISERFS_SB(s)->s_jquota_fmt) {
733 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
734 seq_puts(seq, ",jqfmt=vfsold");
735 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
736 seq_puts(seq, ",jqfmt=vfsv0");
740 /* Block allocator options */
741 if (opts & (1 << REISERFS_NO_BORDER))
742 seq_puts(seq, ",block-allocator=noborder");
743 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
744 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
745 if (opts & (1 << REISERFS_HASHED_RELOCATION))
746 seq_puts(seq, ",block-allocator=hashed_relocation");
747 if (opts & (1 << REISERFS_TEST4))
748 seq_puts(seq, ",block-allocator=test4");
749 show_alloc_options(seq, s);
754 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
756 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
759 static struct dquot **reiserfs_get_dquots(struct inode *inode)
761 return REISERFS_I(inode)->i_dquot;
765 static const struct super_operations reiserfs_sops = {
766 .alloc_inode = reiserfs_alloc_inode,
767 .destroy_inode = reiserfs_destroy_inode,
768 .write_inode = reiserfs_write_inode,
769 .dirty_inode = reiserfs_dirty_inode,
770 .evict_inode = reiserfs_evict_inode,
771 .put_super = reiserfs_put_super,
772 .sync_fs = reiserfs_sync_fs,
773 .freeze_fs = reiserfs_freeze,
774 .unfreeze_fs = reiserfs_unfreeze,
775 .statfs = reiserfs_statfs,
776 .remount_fs = reiserfs_remount,
777 .show_options = reiserfs_show_options,
779 .quota_read = reiserfs_quota_read,
780 .quota_write = reiserfs_quota_write,
781 .get_dquots = reiserfs_get_dquots,
786 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
788 static int reiserfs_write_dquot(struct dquot *);
789 static int reiserfs_acquire_dquot(struct dquot *);
790 static int reiserfs_release_dquot(struct dquot *);
791 static int reiserfs_mark_dquot_dirty(struct dquot *);
792 static int reiserfs_write_info(struct super_block *, int);
793 static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
795 static const struct dquot_operations reiserfs_quota_operations = {
796 .write_dquot = reiserfs_write_dquot,
797 .acquire_dquot = reiserfs_acquire_dquot,
798 .release_dquot = reiserfs_release_dquot,
799 .mark_dirty = reiserfs_mark_dquot_dirty,
800 .write_info = reiserfs_write_info,
801 .alloc_dquot = dquot_alloc,
802 .destroy_dquot = dquot_destroy,
805 static const struct quotactl_ops reiserfs_qctl_operations = {
806 .quota_on = reiserfs_quota_on,
807 .quota_off = dquot_quota_off,
808 .quota_sync = dquot_quota_sync,
809 .get_state = dquot_get_state,
810 .set_info = dquot_set_dqinfo,
811 .get_dqblk = dquot_get_dqblk,
812 .set_dqblk = dquot_set_dqblk,
816 static const struct export_operations reiserfs_export_ops = {
817 .encode_fh = reiserfs_encode_fh,
818 .fh_to_dentry = reiserfs_fh_to_dentry,
819 .fh_to_parent = reiserfs_fh_to_parent,
820 .get_parent = reiserfs_get_parent,
824 * this struct is used in reiserfs_getopt () for containing the value for
825 * those mount options that have values rather than being toggles.
830 * bitmask which is to set on mount_options bitmask
831 * when this value is found, 0 is no bits are to be changed.
835 * bitmask which is to clear on mount_options bitmask
836 * when this value is found, 0 is no bits are to be changed.
837 * This is applied BEFORE setmask
842 /* Set this bit in arg_required to allow empty arguments */
843 #define REISERFS_OPT_ALLOWEMPTY 31
846 * this struct is used in reiserfs_getopt() for describing the
847 * set of reiserfs mount options
852 /* 0 if argument is not required, not 0 otherwise */
855 /* list of values accepted by an option */
856 const arg_desc_t *values;
859 * bitmask which is to set on mount_options bitmask
860 * when this value is found, 0 is no bits are to be changed.
865 * bitmask which is to clear on mount_options bitmask
866 * when this value is found, 0 is no bits are to be changed.
867 * This is applied BEFORE setmask
872 /* possible values for -o data= */
873 static const arg_desc_t logging_mode[] = {
874 {"ordered", 1 << REISERFS_DATA_ORDERED,
875 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
876 {"journal", 1 << REISERFS_DATA_LOG,
877 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
878 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
879 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
883 /* possible values for -o barrier= */
884 static const arg_desc_t barrier_mode[] = {
885 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
886 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
891 * possible values for "-o block-allocator=" and bits which are to be set in
892 * s_mount_opt of reiserfs specific part of in-core super block
894 static const arg_desc_t balloc[] = {
895 {"noborder", 1 << REISERFS_NO_BORDER, 0},
896 {"border", 0, 1 << REISERFS_NO_BORDER},
897 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
898 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
899 {"test4", 1 << REISERFS_TEST4, 0},
900 {"notest4", 0, 1 << REISERFS_TEST4},
904 static const arg_desc_t tails[] = {
905 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
906 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
907 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
911 static const arg_desc_t error_actions[] = {
912 {"panic", 1 << REISERFS_ERROR_PANIC,
913 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
914 {"ro-remount", 1 << REISERFS_ERROR_RO,
915 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
916 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
917 {"continue", 1 << REISERFS_ERROR_CONTINUE,
918 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
924 * proceed only one option from a list *cur - string containing of mount
926 * opts - array of options which are accepted
927 * opt_arg - if option is found and requires an argument and if it is specifed
928 * in the input - pointer to the argument is stored here
929 * bit_flags - if option requires to set a certain bit - it is set here
930 * return -1 if unknown option is found, opt->arg_required otherwise
932 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
933 char **opt_arg, unsigned long *bit_flags)
943 const opt_desc_t *opt;
944 const arg_desc_t *arg;
948 /* assume argument cannot contain commas */
949 *cur = strchr(p, ',');
955 if (!strncmp(p, "alloc=", 6)) {
957 * Ugly special case, probably we should redo options
958 * parser so that it can understand several arguments for
959 * some options, also so that it can fill several bitfields
960 * with option values.
962 if (reiserfs_parse_alloc_options(s, p + 6)) {
969 /* for every option in the list */
970 for (opt = opts; opt->option_name; opt++) {
971 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
974 (1 << REISERFS_UNSUPPORTED_OPT))
975 reiserfs_warning(s, "super-6500",
976 "%s not supported.\n",
979 *bit_flags &= ~opt->clrmask;
981 (1 << REISERFS_UNSUPPORTED_OPT))
982 reiserfs_warning(s, "super-6501",
983 "%s not supported.\n",
986 *bit_flags |= opt->setmask;
991 if (!opt->option_name) {
992 reiserfs_warning(s, "super-6502",
993 "unknown mount option \"%s\"", p);
997 p += strlen(opt->option_name);
1000 if (!opt->arg_required) {
1001 reiserfs_warning(s, "super-6503",
1002 "the option \"%s\" does not "
1003 "require an argument\n",
1010 if (opt->arg_required) {
1011 reiserfs_warning(s, "super-6504",
1012 "the option \"%s\" requires an "
1013 "argument\n", opt->option_name);
1018 reiserfs_warning(s, "super-6505",
1019 "head of option \"%s\" is only correct\n",
1025 * move to the argument, or to next option if argument is not
1030 if (opt->arg_required
1031 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1033 /* this catches "option=," if not allowed */
1034 reiserfs_warning(s, "super-6506",
1035 "empty argument for \"%s\"\n",
1041 /* *=NULLopt_arg contains pointer to argument */
1043 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1046 /* values possible for this option are listed in opt->values */
1047 for (arg = opt->values; arg->value; arg++) {
1048 if (!strcmp(p, arg->value)) {
1050 *bit_flags &= ~arg->clrmask;
1051 *bit_flags |= arg->setmask;
1053 return opt->arg_required;
1057 reiserfs_warning(s, "super-6506",
1058 "bad value \"%s\" for option \"%s\"\n", p,
1063 /* returns 0 if something is wrong in option string, 1 - otherwise */
1064 static int reiserfs_parse_options(struct super_block *s,
1066 /* string given via mount's -o */
1070 * after the parsing phase, contains the
1071 * collection of bitflags defining what
1072 * mount options were selected.
1074 unsigned long *mount_options,
1076 /* strtol-ed from NNN of resize=NNN */
1077 unsigned long *blocks,
1079 unsigned int *commit_max_age,
1086 opt_desc_t opts[] = {
1088 * Compatibility stuff, so that -o notail for old
1091 {"tails",.arg_required = 't',.values = tails},
1092 {"notail",.clrmask =
1093 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1094 {"conv",.setmask = 1 << REISERFS_CONVERT},
1095 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1096 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1097 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1098 #ifdef CONFIG_REISERFS_FS_XATTR
1099 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1100 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1102 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1103 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1105 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1106 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1107 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1109 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1110 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1112 {.option_name = "nolog"},
1113 {"replayonly",.setmask = 1 << REPLAYONLY},
1114 {"block-allocator",.arg_required = 'a',.values = balloc},
1115 {"data",.arg_required = 'd',.values = logging_mode},
1116 {"barrier",.arg_required = 'b',.values = barrier_mode},
1117 {"resize",.arg_required = 'r',.values = NULL},
1118 {"jdev",.arg_required = 'j',.values = NULL},
1119 {"nolargeio",.arg_required = 'w',.values = NULL},
1120 {"commit",.arg_required = 'c',.values = NULL},
1121 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1122 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1123 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1124 {"errors",.arg_required = 'e',.values = error_actions},
1125 {"usrjquota",.arg_required =
1126 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1127 {"grpjquota",.arg_required =
1128 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1129 {"jqfmt",.arg_required = 'f',.values = NULL},
1130 {.option_name = NULL}
1134 if (!options || !*options)
1136 * use default configuration: create tails, journaling on, no
1137 * conversion to newest format
1141 for (pos = options; pos;) {
1142 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1144 /* wrong option is given */
1151 /* "resize=NNN" or "resize=auto" */
1153 if (!strcmp(arg, "auto")) {
1154 /* From JFS code, to auto-get the size. */
1156 s->s_bdev->bd_inode->i_size >> s->
1159 *blocks = simple_strtoul(arg, &p, 0);
1161 /* NNN does not look like a number */
1162 reiserfs_warning(s, "super-6507",
1172 unsigned long val = simple_strtoul(arg, &p, 0);
1173 /* commit=NNN (time in seconds) */
1174 if (*p != '\0' || val >= (unsigned int)-1) {
1175 reiserfs_warning(s, "super-6508",
1176 "bad value %s for -ocommit\n",
1180 *commit_max_age = (unsigned int)val;
1184 reiserfs_warning(s, "super-6509", "nolargeio option "
1185 "is no longer supported");
1190 if (arg && *arg && jdev_name) {
1191 /* Hm, already assigned? */
1193 reiserfs_warning(s, "super-6510",
1194 "journal device was "
1195 "already specified to "
1196 "be %s", *jdev_name);
1203 if (c == 'u' || c == 'g') {
1204 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1206 if (sb_any_quota_loaded(s) &&
1207 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1208 reiserfs_warning(s, "super-6511",
1209 "cannot change journaled "
1210 "quota options when quota "
1214 if (*arg) { /* Some filename specified? */
1215 if (REISERFS_SB(s)->s_qf_names[qtype]
1216 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1218 reiserfs_warning(s, "super-6512",
1220 "already specified.",
1224 if (strchr(arg, '/')) {
1225 reiserfs_warning(s, "super-6513",
1226 "quotafile must be "
1227 "on filesystem root.");
1230 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1231 if (!qf_names[qtype]) {
1232 reiserfs_warning(s, "reiserfs-2502",
1233 "not enough memory "
1238 if (qtype == USRQUOTA)
1239 *mount_options |= 1 << REISERFS_USRQUOTA;
1241 *mount_options |= 1 << REISERFS_GRPQUOTA;
1243 if (qf_names[qtype] !=
1244 REISERFS_SB(s)->s_qf_names[qtype])
1245 kfree(qf_names[qtype]);
1246 qf_names[qtype] = NULL;
1247 if (qtype == USRQUOTA)
1248 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1250 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1254 if (!strcmp(arg, "vfsold"))
1255 *qfmt = QFMT_VFS_OLD;
1256 else if (!strcmp(arg, "vfsv0"))
1257 *qfmt = QFMT_VFS_V0;
1259 reiserfs_warning(s, "super-6514",
1260 "unknown quota format "
1264 if (sb_any_quota_loaded(s) &&
1265 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1266 reiserfs_warning(s, "super-6515",
1267 "cannot change journaled "
1268 "quota options when quota "
1274 if (c == 'u' || c == 'g' || c == 'f') {
1275 reiserfs_warning(s, "reiserfs-2503", "journaled "
1276 "quota options not supported.");
1283 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1284 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1285 reiserfs_warning(s, "super-6515",
1286 "journaled quota format not specified.");
1289 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1290 sb_has_quota_loaded(s, USRQUOTA)) ||
1291 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1292 sb_has_quota_loaded(s, GRPQUOTA))) {
1293 reiserfs_warning(s, "super-6516", "quota options must "
1294 "be present when quota is turned on.");
1302 static void switch_data_mode(struct super_block *s, unsigned long mode)
1304 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1305 (1 << REISERFS_DATA_ORDERED) |
1306 (1 << REISERFS_DATA_WRITEBACK));
1307 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1310 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1312 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1313 if (!reiserfs_data_log(s)) {
1314 switch_data_mode(s, REISERFS_DATA_LOG);
1315 reiserfs_info(s, "switching to journaled data mode\n");
1317 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1318 if (!reiserfs_data_ordered(s)) {
1319 switch_data_mode(s, REISERFS_DATA_ORDERED);
1320 reiserfs_info(s, "switching to ordered data mode\n");
1322 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1323 if (!reiserfs_data_writeback(s)) {
1324 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1325 reiserfs_info(s, "switching to writeback data mode\n");
1330 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1332 int flush = (1 << REISERFS_BARRIER_FLUSH);
1333 int none = (1 << REISERFS_BARRIER_NONE);
1334 int all_barrier = flush | none;
1336 if (bits & all_barrier) {
1337 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1339 REISERFS_SB(s)->s_mount_opt |= flush;
1340 printk("reiserfs: enabling write barrier flush mode\n");
1341 } else if (bits & none) {
1342 REISERFS_SB(s)->s_mount_opt |= none;
1343 printk("reiserfs: write barriers turned off\n");
1348 static void handle_attrs(struct super_block *s)
1350 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1352 if (reiserfs_attrs(s)) {
1353 if (old_format_only(s)) {
1354 reiserfs_warning(s, "super-6517", "cannot support "
1355 "attributes on 3.5.x disk format");
1356 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1359 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1360 reiserfs_warning(s, "super-6518", "cannot support "
1361 "attributes until flag is set in "
1363 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1369 static void handle_quota_files(struct super_block *s, char **qf_names,
1374 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1375 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1376 kfree(REISERFS_SB(s)->s_qf_names[i]);
1377 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1380 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1384 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1386 struct reiserfs_super_block *rs;
1387 struct reiserfs_transaction_handle th;
1388 unsigned long blocks;
1389 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1390 unsigned long safe_mask = 0;
1391 unsigned int commit_max_age = (unsigned int)-1;
1392 struct reiserfs_journal *journal = SB_JOURNAL(s);
1393 char *new_opts = kstrdup(arg, GFP_KERNEL);
1395 char *qf_names[REISERFS_MAXQUOTAS];
1396 unsigned int qfmt = 0;
1402 reiserfs_write_lock(s);
1405 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1408 rs = SB_DISK_SUPER_BLOCK(s);
1410 if (!reiserfs_parse_options
1411 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1414 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1415 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1419 goto out_err_unlock;
1422 handle_quota_files(s, qf_names, &qfmt);
1427 /* Add options that are safe here */
1428 safe_mask |= 1 << REISERFS_SMALLTAIL;
1429 safe_mask |= 1 << REISERFS_LARGETAIL;
1430 safe_mask |= 1 << REISERFS_NO_BORDER;
1431 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1432 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1433 safe_mask |= 1 << REISERFS_TEST4;
1434 safe_mask |= 1 << REISERFS_ATTRS;
1435 safe_mask |= 1 << REISERFS_XATTRS_USER;
1436 safe_mask |= 1 << REISERFS_POSIXACL;
1437 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1438 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1439 safe_mask |= 1 << REISERFS_ERROR_RO;
1440 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1441 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1442 safe_mask |= 1 << REISERFS_USRQUOTA;
1443 safe_mask |= 1 << REISERFS_GRPQUOTA;
1446 * Update the bitmask, taking care to keep
1447 * the bits we're not allowed to change here
1449 REISERFS_SB(s)->s_mount_opt =
1451 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1453 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1454 journal->j_max_commit_age = commit_max_age;
1455 journal->j_max_trans_age = commit_max_age;
1456 } else if (commit_max_age == 0) {
1457 /* 0 means restore defaults. */
1458 journal->j_max_commit_age = journal->j_default_max_commit_age;
1459 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1463 err = reiserfs_resize(s, blocks);
1465 goto out_err_unlock;
1468 if (*mount_flags & MS_RDONLY) {
1469 reiserfs_write_unlock(s);
1470 reiserfs_xattr_init(s, *mount_flags);
1471 /* remount read-only */
1472 if (s->s_flags & MS_RDONLY)
1473 /* it is read-only already */
1474 goto out_ok_unlocked;
1476 err = dquot_suspend(s, -1);
1480 /* try to remount file system with read-only permissions */
1481 if (sb_umount_state(rs) == REISERFS_VALID_FS
1482 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1483 goto out_ok_unlocked;
1486 reiserfs_write_lock(s);
1488 err = journal_begin(&th, s, 10);
1490 goto out_err_unlock;
1492 /* Mounting a rw partition read-only. */
1493 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1494 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1495 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1497 /* remount read-write */
1498 if (!(s->s_flags & MS_RDONLY)) {
1499 reiserfs_write_unlock(s);
1500 reiserfs_xattr_init(s, *mount_flags);
1501 goto out_ok_unlocked; /* We are read-write already */
1504 if (reiserfs_is_journal_aborted(journal)) {
1505 err = journal->j_errno;
1506 goto out_err_unlock;
1509 handle_data_mode(s, mount_options);
1510 handle_barrier_mode(s, mount_options);
1511 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1513 /* now it is safe to call journal_begin */
1514 s->s_flags &= ~MS_RDONLY;
1515 err = journal_begin(&th, s, 10);
1517 goto out_err_unlock;
1519 /* Mount a partition which is read-only, read-write */
1520 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1521 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1522 s->s_flags &= ~MS_RDONLY;
1523 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1524 if (!old_format_only(s))
1525 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1526 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1527 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1528 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1530 /* this will force a full flush of all journal lists */
1531 SB_JOURNAL(s)->j_must_wait = 1;
1532 err = journal_end(&th);
1534 goto out_err_unlock;
1536 reiserfs_write_unlock(s);
1537 if (!(*mount_flags & MS_RDONLY)) {
1538 dquot_resume(s, -1);
1539 reiserfs_write_lock(s);
1540 finish_unfinished(s);
1541 reiserfs_write_unlock(s);
1542 reiserfs_xattr_init(s, *mount_flags);
1546 replace_mount_options(s, new_opts);
1550 reiserfs_write_unlock(s);
1556 static int read_super_block(struct super_block *s, int offset)
1558 struct buffer_head *bh;
1559 struct reiserfs_super_block *rs;
1562 bh = sb_bread(s, offset / s->s_blocksize);
1564 reiserfs_warning(s, "sh-2006",
1565 "bread failed (dev %s, block %lu, size %lu)",
1566 s->s_id, offset / s->s_blocksize,
1571 rs = (struct reiserfs_super_block *)bh->b_data;
1572 if (!is_any_reiserfs_magic_string(rs)) {
1577 * ok, reiserfs signature (old or new) found in at the given offset
1579 fs_blocksize = sb_blocksize(rs);
1581 sb_set_blocksize(s, fs_blocksize);
1583 bh = sb_bread(s, offset / s->s_blocksize);
1585 reiserfs_warning(s, "sh-2007",
1586 "bread failed (dev %s, block %lu, size %lu)",
1587 s->s_id, offset / s->s_blocksize,
1592 rs = (struct reiserfs_super_block *)bh->b_data;
1593 if (sb_blocksize(rs) != s->s_blocksize) {
1594 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1595 "filesystem on (dev %s, block %llu, size %lu)",
1597 (unsigned long long)bh->b_blocknr,
1603 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1605 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1606 "--rebuild-tree run detected. Please run\n"
1607 "reiserfsck --rebuild-tree and wait for a "
1608 "completion. If that fails\n"
1609 "get newer reiserfsprogs package");
1613 SB_BUFFER_WITH_SB(s) = bh;
1614 SB_DISK_SUPER_BLOCK(s) = rs;
1617 * magic is of non-standard journal filesystem, look at s_version to
1618 * find which format is in use
1620 if (is_reiserfs_jr(rs)) {
1621 if (sb_version(rs) == REISERFS_VERSION_2)
1622 reiserfs_info(s, "found reiserfs format \"3.6\""
1623 " with non-standard journal\n");
1624 else if (sb_version(rs) == REISERFS_VERSION_1)
1625 reiserfs_info(s, "found reiserfs format \"3.5\""
1626 " with non-standard journal\n");
1628 reiserfs_warning(s, "sh-2012", "found unknown "
1629 "format \"%u\" of reiserfs with "
1630 "non-standard magic", sb_version(rs));
1635 * s_version of standard format may contain incorrect
1636 * information, so we just look at the magic string
1639 "found reiserfs format \"%s\" with standard journal\n",
1640 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1642 s->s_op = &reiserfs_sops;
1643 s->s_export_op = &reiserfs_export_ops;
1645 s->s_qcop = &reiserfs_qctl_operations;
1646 s->dq_op = &reiserfs_quota_operations;
1647 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1651 * new format is limited by the 32 bit wide i_blocks field, want to
1652 * be one full block below that.
1654 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1658 /* after journal replay, reread all bitmap and super blocks */
1659 static int reread_meta_blocks(struct super_block *s)
1661 ll_rw_block(READ, 1, &SB_BUFFER_WITH_SB(s));
1662 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1663 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1664 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1671 /* hash detection stuff */
1674 * if root directory is empty - we set default - Yura's - hash and
1676 * FIXME: we look for only one name in a directory. If tea and yura
1677 * both have the same value - we ask user to send report to the
1680 static __u32 find_hash_out(struct super_block *s)
1683 struct inode *inode;
1685 INITIALIZE_PATH(path);
1686 struct reiserfs_dir_entry de;
1687 struct reiserfs_de_head *deh;
1688 __u32 hash = DEFAULT_HASH;
1689 __u32 deh_hashval, teahash, r5hash, yurahash;
1691 inode = d_inode(s->s_root);
1693 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1694 retval = search_by_entry_key(s, &key, &path, &de);
1695 if (retval == IO_ERROR) {
1699 if (retval == NAME_NOT_FOUND)
1702 set_de_name_and_namelen(&de);
1703 deh = de.de_deh + de.de_entry_num;
1705 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1706 /* allow override in this case */
1707 if (reiserfs_rupasov_hash(s))
1709 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1713 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1714 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1715 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1716 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1718 if ((teahash == r5hash && deh_hashval == r5hash) ||
1719 (teahash == yurahash && deh_hashval == yurahash) ||
1720 (r5hash == yurahash && deh_hashval == yurahash)) {
1721 reiserfs_warning(s, "reiserfs-2506",
1722 "Unable to automatically detect hash "
1723 "function. Please mount with -o "
1724 "hash={tea,rupasov,r5}");
1729 if (deh_hashval == yurahash)
1731 else if (deh_hashval == teahash)
1733 else if (deh_hashval == r5hash)
1736 reiserfs_warning(s, "reiserfs-2506",
1737 "Unrecognised hash function");
1745 /* finds out which hash names are sorted with */
1746 static int what_hash(struct super_block *s)
1750 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1753 * reiserfs_hash_detect() == true if any of the hash mount options
1754 * were used. We must check them to make sure the user isn't
1755 * using a bad hash value
1757 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1758 code = find_hash_out(s);
1760 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1762 * detection has found the hash, and we must check against the
1765 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1766 reiserfs_warning(s, "reiserfs-2507",
1767 "Error, %s hash detected, "
1768 "unable to force rupasov hash",
1769 reiserfs_hashname(code));
1771 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1772 reiserfs_warning(s, "reiserfs-2508",
1773 "Error, %s hash detected, "
1774 "unable to force tea hash",
1775 reiserfs_hashname(code));
1777 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1778 reiserfs_warning(s, "reiserfs-2509",
1779 "Error, %s hash detected, "
1780 "unable to force r5 hash",
1781 reiserfs_hashname(code));
1786 * find_hash_out was not called or
1787 * could not determine the hash
1789 if (reiserfs_rupasov_hash(s)) {
1791 } else if (reiserfs_tea_hash(s)) {
1793 } else if (reiserfs_r5_hash(s)) {
1799 * if we are mounted RW, and we have a new valid hash code, update
1802 if (code != UNSET_HASH &&
1803 !(s->s_flags & MS_RDONLY) &&
1804 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1805 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1810 /* return pointer to appropriate function */
1811 static hashf_t hash_function(struct super_block *s)
1813 switch (what_hash(s)) {
1815 reiserfs_info(s, "Using tea hash to sort names\n");
1818 reiserfs_info(s, "Using rupasov hash to sort names\n");
1821 reiserfs_info(s, "Using r5 hash to sort names\n");
1827 /* this is used to set up correct value for old partitions */
1828 static int function2code(hashf_t func)
1830 if (func == keyed_hash)
1832 if (func == yura_hash)
1834 if (func == r5_hash)
1837 BUG(); /* should never happen */
1842 #define SWARN(silent, s, id, ...) \
1844 reiserfs_warning(s, id, __VA_ARGS__)
1846 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1848 struct inode *root_inode;
1849 struct reiserfs_transaction_handle th;
1851 unsigned long blocks;
1852 unsigned int commit_max_age = 0;
1854 struct reiserfs_iget_args args;
1855 struct reiserfs_super_block *rs;
1857 struct reiserfs_sb_info *sbi;
1858 int errval = -EINVAL;
1859 char *qf_names[REISERFS_MAXQUOTAS] = {};
1860 unsigned int qfmt = 0;
1862 save_mount_options(s, data);
1864 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1868 /* Set default values for options: non-aggressive tails, RO on errors */
1869 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1870 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1871 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1872 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1873 sbi->s_alloc_options.preallocmin = 0;
1874 /* Preallocate by 16 blocks (17-1) at once */
1875 sbi->s_alloc_options.preallocsize = 17;
1876 /* setup default block allocator options */
1877 reiserfs_init_alloc_options(s);
1879 spin_lock_init(&sbi->old_work_lock);
1880 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1881 mutex_init(&sbi->lock);
1882 sbi->lock_depth = -1;
1884 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1886 if (!sbi->commit_wq) {
1887 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1889 goto error_unlocked;
1893 if (reiserfs_parse_options
1894 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1895 &commit_max_age, qf_names, &qfmt) == 0) {
1896 goto error_unlocked;
1898 if (jdev_name && jdev_name[0]) {
1899 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1901 SWARN(silent, s, "", "Cannot allocate memory for "
1902 "journal device name");
1907 handle_quota_files(s, qf_names, &qfmt);
1911 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1912 goto error_unlocked;
1916 * try old format (undistributed bitmap, super block in 8-th 1k
1917 * block of a device)
1919 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1923 * try new format (64-th 1k block), which can contain reiserfs
1926 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1927 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1929 goto error_unlocked;
1932 rs = SB_DISK_SUPER_BLOCK(s);
1934 * Let's do basic sanity check to verify that underlying device is not
1935 * smaller than the filesystem. If the check fails then abort and
1936 * scream, because bad stuff will happen otherwise.
1938 if (s->s_bdev && s->s_bdev->bd_inode
1939 && i_size_read(s->s_bdev->bd_inode) <
1940 sb_block_count(rs) * sb_blocksize(rs)) {
1941 SWARN(silent, s, "", "Filesystem cannot be "
1942 "mounted because it is bigger than the device");
1943 SWARN(silent, s, "", "You may need to run fsck "
1944 "or increase size of your LVM partition");
1945 SWARN(silent, s, "", "Or may be you forgot to "
1946 "reboot after fdisk when it told you to");
1947 goto error_unlocked;
1950 sbi->s_mount_state = SB_REISERFS_STATE(s);
1951 sbi->s_mount_state = REISERFS_VALID_FS;
1953 if ((errval = reiserfs_init_bitmap_cache(s))) {
1954 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1955 goto error_unlocked;
1959 #ifdef CONFIG_REISERFS_CHECK
1960 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1961 SWARN(silent, s, "", "- it is slow mode for debugging.");
1964 /* make data=ordered the default */
1965 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1966 !reiserfs_data_writeback(s)) {
1967 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1970 if (reiserfs_data_log(s)) {
1971 reiserfs_info(s, "using journaled data mode\n");
1972 } else if (reiserfs_data_ordered(s)) {
1973 reiserfs_info(s, "using ordered data mode\n");
1975 reiserfs_info(s, "using writeback data mode\n");
1977 if (reiserfs_barrier_flush(s)) {
1978 printk("reiserfs: using flush barriers\n");
1981 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1982 SWARN(silent, s, "sh-2022",
1983 "unable to initialize journal space");
1984 goto error_unlocked;
1987 * once this is set, journal_release must be called
1988 * if we error out of the mount
1993 if (reread_meta_blocks(s)) {
1994 SWARN(silent, s, "jmacd-9",
1995 "unable to reread meta blocks after journal init");
1996 goto error_unlocked;
2000 goto error_unlocked;
2002 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
2003 SWARN(silent, s, "clm-7000",
2004 "Detected readonly device, marking FS readonly");
2005 s->s_flags |= MS_RDONLY;
2007 args.objectid = REISERFS_ROOT_OBJECTID;
2008 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2010 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2011 reiserfs_init_locked_inode, (void *)&args);
2013 SWARN(silent, s, "jmacd-10", "get root inode failed");
2014 goto error_unlocked;
2018 * This path assumed to be called with the BKL in the old times.
2019 * Now we have inherited the big reiserfs lock from it and many
2020 * reiserfs helpers called in the mount path and elsewhere require
2021 * this lock to be held even if it's not always necessary. Let's be
2022 * conservative and hold it early. The window can be reduced after
2023 * careful review of the code.
2025 reiserfs_write_lock(s);
2027 if (root_inode->i_state & I_NEW) {
2028 reiserfs_read_locked_inode(root_inode, &args);
2029 unlock_new_inode(root_inode);
2032 s->s_root = d_make_root(root_inode);
2035 /* define and initialize hash function */
2036 sbi->s_hash_function = hash_function(s);
2037 if (sbi->s_hash_function == NULL) {
2043 if (is_reiserfs_3_5(rs)
2044 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2045 set_bit(REISERFS_3_5, &sbi->s_properties);
2046 else if (old_format)
2047 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2049 set_bit(REISERFS_3_6, &sbi->s_properties);
2051 if (!(s->s_flags & MS_RDONLY)) {
2053 errval = journal_begin(&th, s, 1);
2059 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2061 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2062 set_sb_fs_state(rs, 0);
2065 * Clear out s_bmap_nr if it would wrap. We can handle this
2066 * case, but older revisions can't. This will cause the
2067 * file system to fail mount on those older implementations,
2068 * avoiding corruption. -jeffm
2070 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2071 sb_bmap_nr(rs) != 0) {
2072 reiserfs_warning(s, "super-2030", "This file system "
2073 "claims to use %u bitmap blocks in "
2074 "its super block, but requires %u. "
2075 "Clearing to zero.", sb_bmap_nr(rs),
2076 reiserfs_bmap_count(s));
2078 set_sb_bmap_nr(rs, 0);
2081 if (old_format_only(s)) {
2083 * filesystem of format 3.5 either with standard
2084 * or non-standard journal
2086 if (convert_reiserfs(s)) {
2087 /* and -o conv is given */
2090 "converting 3.5 filesystem to the 3.6 format");
2092 if (is_reiserfs_3_5(rs))
2094 * put magic string of 3.6 format.
2095 * 2.2 will not be able to
2096 * mount this filesystem anymore
2098 memcpy(rs->s_v1.s_magic,
2099 reiserfs_3_6_magic_string,
2101 (reiserfs_3_6_magic_string));
2103 set_sb_version(rs, REISERFS_VERSION_2);
2104 reiserfs_convert_objectid_map_v1(s);
2105 set_bit(REISERFS_3_6, &sbi->s_properties);
2106 clear_bit(REISERFS_3_5, &sbi->s_properties);
2107 } else if (!silent) {
2108 reiserfs_info(s, "using 3.5.x disk format\n");
2111 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2114 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2115 errval = journal_end(&th);
2122 reiserfs_write_unlock(s);
2123 if ((errval = reiserfs_lookup_privroot(s)) ||
2124 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2127 goto error_unlocked;
2129 reiserfs_write_lock(s);
2132 * look for files which were to be removed in previous session
2134 finish_unfinished(s);
2136 if (old_format_only(s) && !silent) {
2137 reiserfs_info(s, "using 3.5.x disk format\n");
2140 reiserfs_write_unlock(s);
2141 if ((errval = reiserfs_lookup_privroot(s)) ||
2142 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2145 goto error_unlocked;
2147 reiserfs_write_lock(s);
2150 * mark hash in super block: it could be unset. overwrite should be ok
2152 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2156 reiserfs_proc_info_init(s);
2158 init_waitqueue_head(&(sbi->s_wait));
2159 spin_lock_init(&sbi->bitmap_lock);
2161 reiserfs_write_unlock(s);
2166 reiserfs_write_unlock(s);
2169 /* kill the commit thread, free journal ram */
2171 reiserfs_write_lock(s);
2172 journal_release_error(NULL, s);
2173 reiserfs_write_unlock(s);
2177 destroy_workqueue(sbi->commit_wq);
2179 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2181 reiserfs_free_bitmap_cache(s);
2182 if (SB_BUFFER_WITH_SB(s))
2183 brelse(SB_BUFFER_WITH_SB(s));
2187 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2193 s->s_fs_info = NULL;
2197 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2199 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2201 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2202 buf->f_bfree = sb_free_blocks(rs);
2203 buf->f_bavail = buf->f_bfree;
2204 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2205 buf->f_bsize = dentry->d_sb->s_blocksize;
2206 /* changed to accommodate gcc folks. */
2207 buf->f_type = REISERFS_SUPER_MAGIC;
2208 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2209 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2210 sizeof(rs->s_uuid)/2);
2216 static int reiserfs_write_dquot(struct dquot *dquot)
2218 struct reiserfs_transaction_handle th;
2222 reiserfs_write_lock(dquot->dq_sb);
2224 journal_begin(&th, dquot->dq_sb,
2225 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2228 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2229 ret = dquot_commit(dquot);
2230 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2231 err = journal_end(&th);
2235 reiserfs_write_unlock(dquot->dq_sb);
2239 static int reiserfs_acquire_dquot(struct dquot *dquot)
2241 struct reiserfs_transaction_handle th;
2245 reiserfs_write_lock(dquot->dq_sb);
2247 journal_begin(&th, dquot->dq_sb,
2248 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2251 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2252 ret = dquot_acquire(dquot);
2253 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2254 err = journal_end(&th);
2258 reiserfs_write_unlock(dquot->dq_sb);
2262 static int reiserfs_release_dquot(struct dquot *dquot)
2264 struct reiserfs_transaction_handle th;
2267 reiserfs_write_lock(dquot->dq_sb);
2269 journal_begin(&th, dquot->dq_sb,
2270 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2271 reiserfs_write_unlock(dquot->dq_sb);
2273 /* Release dquot anyway to avoid endless cycle in dqput() */
2274 dquot_release(dquot);
2277 ret = dquot_release(dquot);
2278 reiserfs_write_lock(dquot->dq_sb);
2279 err = journal_end(&th);
2282 reiserfs_write_unlock(dquot->dq_sb);
2287 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2289 /* Are we journaling quotas? */
2290 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2291 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2292 dquot_mark_dquot_dirty(dquot);
2293 return reiserfs_write_dquot(dquot);
2295 return dquot_mark_dquot_dirty(dquot);
2298 static int reiserfs_write_info(struct super_block *sb, int type)
2300 struct reiserfs_transaction_handle th;
2304 /* Data block + inode block */
2305 reiserfs_write_lock(sb);
2306 ret = journal_begin(&th, sb, 2);
2309 depth = reiserfs_write_unlock_nested(sb);
2310 ret = dquot_commit_info(sb, type);
2311 reiserfs_write_lock_nested(sb, depth);
2312 err = journal_end(&th);
2316 reiserfs_write_unlock(sb);
2321 * Turn on quotas during mount time - we need to find the quota file and such...
2323 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2325 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2326 REISERFS_SB(sb)->s_jquota_fmt, type);
2330 * Standard function to be called on quota_on
2332 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2336 struct inode *inode;
2337 struct reiserfs_transaction_handle th;
2338 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2340 reiserfs_write_lock(sb);
2341 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2346 /* Quotafile not on the same filesystem? */
2347 if (path->dentry->d_sb != sb) {
2351 inode = d_inode(path->dentry);
2353 * We must not pack tails for quota files on reiserfs for quota
2356 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2357 err = reiserfs_unpack(inode, NULL);
2359 reiserfs_warning(sb, "super-6520",
2360 "Unpacking tail of quota file failed"
2361 " (%d). Cannot turn on quotas.", err);
2365 mark_inode_dirty(inode);
2367 /* Journaling quota? */
2368 if (REISERFS_SB(sb)->s_qf_names[type]) {
2369 /* Quotafile not of fs root? */
2370 if (path->dentry->d_parent != sb->s_root)
2371 reiserfs_warning(sb, "super-6521",
2372 "Quota file not on filesystem root. "
2373 "Journalled quota will not work.");
2377 * When we journal data on quota file, we have to flush journal to see
2378 * all updates to the file when we bypass pagecache...
2380 if (reiserfs_file_data_log(inode)) {
2381 /* Just start temporary transaction and finish it */
2382 err = journal_begin(&th, sb, 1);
2385 err = journal_end_sync(&th);
2389 reiserfs_write_unlock(sb);
2390 return dquot_quota_on(sb, type, format_id, path);
2392 reiserfs_write_unlock(sb);
2397 * Read data from quotafile - avoid pagecache and such because we cannot afford
2398 * acquiring the locks... As quota files are never truncated and quota code
2399 * itself serializes the operations (and no one else should touch the files)
2400 * we don't have to be afraid of races
2402 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2403 size_t len, loff_t off)
2405 struct inode *inode = sb_dqopt(sb)->files[type];
2406 unsigned long blk = off >> sb->s_blocksize_bits;
2407 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2409 struct buffer_head tmp_bh, *bh;
2410 loff_t i_size = i_size_read(inode);
2414 if (off + len > i_size)
2417 while (toread > 0) {
2419 sb->s_blocksize - offset <
2420 toread ? sb->s_blocksize - offset : toread;
2423 * Quota files are without tails so we can safely
2426 reiserfs_write_lock(sb);
2427 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2428 reiserfs_write_unlock(sb);
2431 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2432 memset(data, 0, tocopy);
2434 bh = sb_bread(sb, tmp_bh.b_blocknr);
2437 memcpy(data, bh->b_data + offset, tocopy);
2449 * Write to quotafile (we know the transaction is already started and has
2452 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2453 const char *data, size_t len, loff_t off)
2455 struct inode *inode = sb_dqopt(sb)->files[type];
2456 unsigned long blk = off >> sb->s_blocksize_bits;
2457 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2458 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2459 size_t towrite = len;
2460 struct buffer_head tmp_bh, *bh;
2462 if (!current->journal_info) {
2463 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2464 (unsigned long long)off, (unsigned long long)len);
2467 while (towrite > 0) {
2468 tocopy = sb->s_blocksize - offset < towrite ?
2469 sb->s_blocksize - offset : towrite;
2471 reiserfs_write_lock(sb);
2472 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2473 reiserfs_write_unlock(sb);
2476 if (offset || tocopy != sb->s_blocksize)
2477 bh = sb_bread(sb, tmp_bh.b_blocknr);
2479 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2485 memcpy(bh->b_data + offset, data, tocopy);
2486 flush_dcache_page(bh->b_page);
2487 set_buffer_uptodate(bh);
2489 reiserfs_write_lock(sb);
2490 reiserfs_prepare_for_journal(sb, bh, 1);
2491 journal_mark_dirty(current->journal_info, bh);
2493 reiserfs_add_ordered_list(inode, bh);
2494 reiserfs_write_unlock(sb);
2504 if (inode->i_size < off + len - towrite)
2505 i_size_write(inode, off + len - towrite);
2507 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2508 mark_inode_dirty(inode);
2509 return len - towrite;
2514 static struct dentry *get_super_block(struct file_system_type *fs_type,
2515 int flags, const char *dev_name,
2518 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2521 static int __init init_reiserfs_fs(void)
2525 ret = init_inodecache();
2529 reiserfs_proc_info_global_init();
2531 ret = register_filesystem(&reiserfs_fs_type);
2537 reiserfs_proc_info_global_done();
2538 destroy_inodecache();
2543 static void __exit exit_reiserfs_fs(void)
2545 reiserfs_proc_info_global_done();
2546 unregister_filesystem(&reiserfs_fs_type);
2547 destroy_inodecache();
2550 struct file_system_type reiserfs_fs_type = {
2551 .owner = THIS_MODULE,
2553 .mount = get_super_block,
2554 .kill_sb = reiserfs_kill_sb,
2555 .fs_flags = FS_REQUIRES_DEV,
2557 MODULE_ALIAS_FS("reiserfs");
2559 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2560 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2561 MODULE_LICENSE("GPL");
2563 module_init(init_reiserfs_fs);
2564 module_exit(exit_reiserfs_fs);