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 <asm/uaccess.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/buffer_head.h>
25 #include <linux/exportfs.h>
26 #include <linux/quotaops.h>
27 #include <linux/vfs.h>
28 #include <linux/mount.h>
29 #include <linux/namei.h>
30 #include <linux/crc32.h>
31 #include <linux/seq_file.h>
33 struct file_system_type reiserfs_fs_type;
35 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
36 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
37 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
39 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
41 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
42 strlen(reiserfs_3_5_magic_string));
45 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
47 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
48 strlen(reiserfs_3_6_magic_string));
51 int is_reiserfs_jr(struct reiserfs_super_block *rs)
53 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
54 strlen(reiserfs_jr_magic_string));
57 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
59 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
63 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
64 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
65 void show_alloc_options(struct seq_file *seq, struct super_block *s);
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, s, 1))
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);
104 if (s->s_flags & MS_RDONLY)
107 spin_lock(&sbi->old_work_lock);
108 if (!sbi->work_queued) {
109 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
110 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
111 sbi->work_queued = 1;
113 spin_unlock(&sbi->old_work_lock);
116 static void cancel_old_flush(struct super_block *s)
118 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
120 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
121 spin_lock(&sbi->old_work_lock);
122 sbi->work_queued = 0;
123 spin_unlock(&sbi->old_work_lock);
126 static int reiserfs_freeze(struct super_block *s)
128 struct reiserfs_transaction_handle th;
132 reiserfs_write_lock(s);
133 if (!(s->s_flags & MS_RDONLY)) {
134 int err = journal_begin(&th, s, 1);
136 reiserfs_block_writes(&th);
138 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
140 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
141 reiserfs_block_writes(&th);
142 journal_end_sync(&th, s, 1);
145 reiserfs_write_unlock(s);
149 static int reiserfs_unfreeze(struct super_block *s)
151 reiserfs_allow_writes(s);
155 extern const struct in_core_key MAX_IN_CORE_KEY;
157 /* this is used to delete "save link" when there are no items of a
158 file it points to. It can either happen if unlink is completed but
159 "save unlink" removal, or if file has both unlink and truncate
160 pending and as unlink completes first (because key of "save link"
161 protecting unlink is bigger that a key lf "save link" which
162 protects truncate), so there left no items to make truncate
164 static int remove_save_link_only(struct super_block *s,
165 struct reiserfs_key *key, int oid_free)
167 struct reiserfs_transaction_handle th;
170 /* we are going to do one balancing */
171 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
175 reiserfs_delete_solid_item(&th, NULL, key);
177 /* removals are protected by direct items */
178 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
180 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
184 static int reiserfs_quota_on_mount(struct super_block *, int);
187 /* look for uncompleted unlinks and truncates and complete them */
188 static int finish_unfinished(struct super_block *s)
190 INITIALIZE_PATH(path);
191 struct cpu_key max_cpu_key, obj_key;
192 struct reiserfs_key save_link_key, last_inode_key;
194 struct item_head *ih;
195 struct buffer_head *bh;
204 int quota_enabled[MAXQUOTAS];
207 /* compose key to look for "save" links */
208 max_cpu_key.version = KEY_FORMAT_3_5;
209 max_cpu_key.on_disk_key.k_dir_id = ~0U;
210 max_cpu_key.on_disk_key.k_objectid = ~0U;
211 set_cpu_key_k_offset(&max_cpu_key, ~0U);
212 max_cpu_key.key_length = 3;
214 memset(&last_inode_key, 0, sizeof(last_inode_key));
217 /* Needed for iput() to work correctly and not trash data */
218 if (s->s_flags & MS_ACTIVE) {
222 s->s_flags |= MS_ACTIVE;
224 /* Turn on quotas so that they are updated correctly */
225 for (i = 0; i < MAXQUOTAS; i++) {
226 quota_enabled[i] = 1;
227 if (REISERFS_SB(s)->s_qf_names[i]) {
230 if (sb_has_quota_active(s, i)) {
231 quota_enabled[i] = 0;
234 ret = reiserfs_quota_on_mount(s, i);
236 reiserfs_warning(s, "reiserfs-2500",
237 "cannot turn on journaled "
238 "quota: error %d", ret);
244 REISERFS_SB(s)->s_is_unlinked_ok = 1;
246 retval = search_item(s, &max_cpu_key, &path);
247 if (retval != ITEM_NOT_FOUND) {
248 reiserfs_error(s, "vs-2140",
249 "search_by_key returned %d", retval);
253 bh = get_last_bh(&path);
254 item_pos = get_item_pos(&path);
255 if (item_pos != B_NR_ITEMS(bh)) {
256 reiserfs_warning(s, "vs-2060",
257 "wrong position found");
261 ih = B_N_PITEM_HEAD(bh, item_pos);
263 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
264 /* there are no "save" links anymore */
267 save_link_key = ih->ih_key;
268 if (is_indirect_le_ih(ih))
273 /* reiserfs_iget needs k_dirid and k_objectid only */
274 item = B_I_PITEM(bh, ih);
275 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
276 obj_key.on_disk_key.k_objectid =
277 le32_to_cpu(ih->ih_key.k_objectid);
278 obj_key.on_disk_key.k_offset = 0;
279 obj_key.on_disk_key.k_type = 0;
283 inode = reiserfs_iget(s, &obj_key);
285 /* the unlink almost completed, it just did not manage to remove
286 "save" link and release objectid */
287 reiserfs_warning(s, "vs-2180", "iget failed for %K",
289 retval = remove_save_link_only(s, &save_link_key, 1);
293 if (!truncate && inode->i_nlink) {
294 /* file is not unlinked */
295 reiserfs_warning(s, "vs-2185",
296 "file %K is not unlinked",
298 retval = remove_save_link_only(s, &save_link_key, 0);
301 reiserfs_write_unlock(s);
302 dquot_initialize(inode);
303 reiserfs_write_lock(s);
305 if (truncate && S_ISDIR(inode->i_mode)) {
306 /* We got a truncate request for a dir which is impossible.
307 The only imaginable way is to execute unfinished truncate request
308 then boot into old kernel, remove the file and create dir with
310 reiserfs_warning(s, "green-2101",
311 "impossible truncate on a "
312 "directory %k. Please report",
314 retval = remove_save_link_only(s, &save_link_key, 0);
321 REISERFS_I(inode)->i_flags |=
322 i_link_saved_truncate_mask;
323 /* not completed truncate found. New size was committed together
325 reiserfs_info(s, "Truncating %k to %Ld ..",
326 INODE_PKEY(inode), inode->i_size);
327 reiserfs_truncate_file(inode,
329 /*don't update modification time */
331 retval = remove_save_link(inode, truncate);
333 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
334 /* not completed unlink (rmdir) found */
335 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
336 if (memcmp(&last_inode_key, INODE_PKEY(inode),
337 sizeof(last_inode_key))){
338 last_inode_key = *INODE_PKEY(inode);
339 /* removal gets completed in iput */
342 reiserfs_warning(s, "super-2189", "Dead loop "
343 "in finish_unfinished "
344 "detected, just remove "
346 retval = remove_save_link_only(s,
355 REISERFS_SB(s)->s_is_unlinked_ok = 0;
358 /* Turn quotas off */
359 for (i = 0; i < MAXQUOTAS; i++) {
360 if (sb_dqopt(s)->files[i] && quota_enabled[i])
361 dquot_quota_off(s, i);
364 /* Restore the flag back */
365 s->s_flags &= ~MS_ACTIVE;
369 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
370 "Completed\n", done);
374 /* to protect file being unlinked from getting lost we "safe" link files
375 being unlinked. This link will be deleted in the same transaction with last
376 item of file. mounting the filesystem we scan all these links and remove
377 files which almost got lost */
378 void add_save_link(struct reiserfs_transaction_handle *th,
379 struct inode *inode, int truncate)
381 INITIALIZE_PATH(path);
387 BUG_ON(!th->t_trans_id);
389 /* file can only get one "save link" of each kind */
391 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
392 "saved link already exists for truncated inode %lx",
395 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
396 "saved link already exists for unlinked inode %lx",
399 /* setup key of "save" link */
400 key.version = KEY_FORMAT_3_5;
401 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
402 key.on_disk_key.k_objectid = inode->i_ino;
404 /* unlink, rmdir, rename */
405 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
406 set_cpu_key_k_type(&key, TYPE_DIRECT);
408 /* item head of "safe" link */
409 make_le_item_head(&ih, &key, key.version,
410 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
411 4 /*length */ , 0xffff /*free space */ );
414 if (S_ISDIR(inode->i_mode))
415 reiserfs_warning(inode->i_sb, "green-2102",
416 "Adding a truncate savelink for "
417 "a directory %k! Please report",
419 set_cpu_key_k_offset(&key, 1);
420 set_cpu_key_k_type(&key, TYPE_INDIRECT);
422 /* item head of "safe" link */
423 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
424 4 /*length */ , 0 /*free space */ );
428 /* look for its place in the tree */
429 retval = search_item(inode->i_sb, &key, &path);
430 if (retval != ITEM_NOT_FOUND) {
431 if (retval != -ENOSPC)
432 reiserfs_error(inode->i_sb, "vs-2100",
433 "search_by_key (%K) returned %d", &key,
439 /* body of "save" link */
440 link = INODE_PKEY(inode)->k_dir_id;
442 /* put "save" link into tree, don't charge quota to anyone */
444 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
446 if (retval != -ENOSPC)
447 reiserfs_error(inode->i_sb, "vs-2120",
448 "insert_item returned %d", retval);
451 REISERFS_I(inode)->i_flags |=
452 i_link_saved_truncate_mask;
454 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
458 /* this opens transaction unlike add_save_link */
459 int remove_save_link(struct inode *inode, int truncate)
461 struct reiserfs_transaction_handle th;
462 struct reiserfs_key key;
465 /* we are going to do one balancing only */
466 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
470 /* setup key of "save" link */
471 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
472 key.k_objectid = INODE_PKEY(inode)->k_objectid;
474 /* unlink, rmdir, rename */
475 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
476 1 + inode->i_sb->s_blocksize);
477 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
480 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
481 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
485 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
487 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
488 /* don't take quota bytes from anywhere */
489 reiserfs_delete_solid_item(&th, NULL, &key);
491 reiserfs_release_objectid(&th, inode->i_ino);
492 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
494 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
496 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
499 static void reiserfs_kill_sb(struct super_block *s)
501 if (REISERFS_SB(s)) {
503 * Force any pending inode evictions to occur now. Any
504 * inodes to be removed that have extended attributes
505 * associated with them need to clean them up before
506 * we can release the extended attribute root dentries.
507 * shrink_dcache_for_umount will BUG if we don't release
508 * those before it's called so ->put_super is too late.
512 dput(REISERFS_SB(s)->xattr_root);
513 REISERFS_SB(s)->xattr_root = NULL;
514 dput(REISERFS_SB(s)->priv_root);
515 REISERFS_SB(s)->priv_root = NULL;
521 static void reiserfs_put_super(struct super_block *s)
523 struct reiserfs_transaction_handle th;
526 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
528 reiserfs_write_lock(s);
530 /* change file system state to current state if it was mounted with read-write permissions */
531 if (!(s->s_flags & MS_RDONLY)) {
532 if (!journal_begin(&th, s, 10)) {
533 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
535 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
536 REISERFS_SB(s)->s_mount_state);
537 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
541 /* note, journal_release checks for readonly mount, and can decide not
542 ** to do a journal_end
544 journal_release(&th, s);
546 reiserfs_free_bitmap_cache(s);
548 brelse(SB_BUFFER_WITH_SB(s));
552 if (REISERFS_SB(s)->reserved_blocks != 0) {
553 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
554 REISERFS_SB(s)->reserved_blocks);
557 reiserfs_proc_info_done(s);
559 reiserfs_write_unlock(s);
560 mutex_destroy(&REISERFS_SB(s)->lock);
565 static struct kmem_cache *reiserfs_inode_cachep;
567 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
569 struct reiserfs_inode_info *ei;
570 ei = (struct reiserfs_inode_info *)
571 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
574 atomic_set(&ei->openers, 0);
575 mutex_init(&ei->tailpack);
576 return &ei->vfs_inode;
579 static void reiserfs_i_callback(struct rcu_head *head)
581 struct inode *inode = container_of(head, struct inode, i_rcu);
582 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
585 static void reiserfs_destroy_inode(struct inode *inode)
587 call_rcu(&inode->i_rcu, reiserfs_i_callback);
590 static void init_once(void *foo)
592 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
594 INIT_LIST_HEAD(&ei->i_prealloc_list);
595 inode_init_once(&ei->vfs_inode);
598 static int init_inodecache(void)
600 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
602 reiserfs_inode_info),
603 0, (SLAB_RECLAIM_ACCOUNT|
606 if (reiserfs_inode_cachep == NULL)
611 static void destroy_inodecache(void)
614 * Make sure all delayed rcu free inodes are flushed before we
618 kmem_cache_destroy(reiserfs_inode_cachep);
621 /* we don't mark inodes dirty, we just log them */
622 static void reiserfs_dirty_inode(struct inode *inode, int flags)
624 struct reiserfs_transaction_handle th;
629 if (inode->i_sb->s_flags & MS_RDONLY) {
630 reiserfs_warning(inode->i_sb, "clm-6006",
631 "writing inode %lu on readonly FS",
635 lock_depth = reiserfs_write_lock_once(inode->i_sb);
637 /* this is really only used for atime updates, so they don't have
638 ** to be included in O_SYNC or fsync
640 err = journal_begin(&th, inode->i_sb, 1);
644 reiserfs_update_sd(&th, inode);
645 journal_end(&th, inode->i_sb, 1);
648 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
651 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
653 struct super_block *s = root->d_sb;
654 struct reiserfs_journal *journal = SB_JOURNAL(s);
655 long opts = REISERFS_SB(s)->s_mount_opt;
657 if (opts & (1 << REISERFS_LARGETAIL))
658 seq_puts(seq, ",tails=on");
659 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
660 seq_puts(seq, ",notail");
661 /* tails=small is default so we don't show it */
663 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
664 seq_puts(seq, ",barrier=none");
665 /* barrier=flush is default so we don't show it */
667 if (opts & (1 << REISERFS_ERROR_CONTINUE))
668 seq_puts(seq, ",errors=continue");
669 else if (opts & (1 << REISERFS_ERROR_PANIC))
670 seq_puts(seq, ",errors=panic");
671 /* errors=ro is default so we don't show it */
673 if (opts & (1 << REISERFS_DATA_LOG))
674 seq_puts(seq, ",data=journal");
675 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
676 seq_puts(seq, ",data=writeback");
677 /* data=ordered is default so we don't show it */
679 if (opts & (1 << REISERFS_ATTRS))
680 seq_puts(seq, ",attrs");
682 if (opts & (1 << REISERFS_XATTRS_USER))
683 seq_puts(seq, ",user_xattr");
685 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
686 seq_puts(seq, ",expose_privroot");
688 if (opts & (1 << REISERFS_POSIXACL))
689 seq_puts(seq, ",acl");
691 if (REISERFS_SB(s)->s_jdev)
692 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
694 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
695 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
698 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
699 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
700 else if (opts & (1 << REISERFS_USRQUOTA))
701 seq_puts(seq, ",usrquota");
702 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
703 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
704 else if (opts & (1 << REISERFS_GRPQUOTA))
705 seq_puts(seq, ",grpquota");
706 if (REISERFS_SB(s)->s_jquota_fmt) {
707 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
708 seq_puts(seq, ",jqfmt=vfsold");
709 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
710 seq_puts(seq, ",jqfmt=vfsv0");
714 /* Block allocator options */
715 if (opts & (1 << REISERFS_NO_BORDER))
716 seq_puts(seq, ",block-allocator=noborder");
717 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
718 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
719 if (opts & (1 << REISERFS_HASHED_RELOCATION))
720 seq_puts(seq, ",block-allocator=hashed_relocation");
721 if (opts & (1 << REISERFS_TEST4))
722 seq_puts(seq, ",block-allocator=test4");
723 show_alloc_options(seq, s);
728 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
730 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
734 static const struct super_operations reiserfs_sops = {
735 .alloc_inode = reiserfs_alloc_inode,
736 .destroy_inode = reiserfs_destroy_inode,
737 .write_inode = reiserfs_write_inode,
738 .dirty_inode = reiserfs_dirty_inode,
739 .evict_inode = reiserfs_evict_inode,
740 .put_super = reiserfs_put_super,
741 .sync_fs = reiserfs_sync_fs,
742 .freeze_fs = reiserfs_freeze,
743 .unfreeze_fs = reiserfs_unfreeze,
744 .statfs = reiserfs_statfs,
745 .remount_fs = reiserfs_remount,
746 .show_options = reiserfs_show_options,
748 .quota_read = reiserfs_quota_read,
749 .quota_write = reiserfs_quota_write,
754 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
756 static int reiserfs_write_dquot(struct dquot *);
757 static int reiserfs_acquire_dquot(struct dquot *);
758 static int reiserfs_release_dquot(struct dquot *);
759 static int reiserfs_mark_dquot_dirty(struct dquot *);
760 static int reiserfs_write_info(struct super_block *, int);
761 static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
763 static const struct dquot_operations reiserfs_quota_operations = {
764 .write_dquot = reiserfs_write_dquot,
765 .acquire_dquot = reiserfs_acquire_dquot,
766 .release_dquot = reiserfs_release_dquot,
767 .mark_dirty = reiserfs_mark_dquot_dirty,
768 .write_info = reiserfs_write_info,
769 .alloc_dquot = dquot_alloc,
770 .destroy_dquot = dquot_destroy,
773 static const struct quotactl_ops reiserfs_qctl_operations = {
774 .quota_on = reiserfs_quota_on,
775 .quota_off = dquot_quota_off,
776 .quota_sync = dquot_quota_sync,
777 .get_info = dquot_get_dqinfo,
778 .set_info = dquot_set_dqinfo,
779 .get_dqblk = dquot_get_dqblk,
780 .set_dqblk = dquot_set_dqblk,
784 static const struct export_operations reiserfs_export_ops = {
785 .encode_fh = reiserfs_encode_fh,
786 .fh_to_dentry = reiserfs_fh_to_dentry,
787 .fh_to_parent = reiserfs_fh_to_parent,
788 .get_parent = reiserfs_get_parent,
791 /* this struct is used in reiserfs_getopt () for containing the value for those
792 mount options that have values rather than being toggles. */
795 int setmask; /* bitmask which is to set on mount_options bitmask when this
796 value is found, 0 is no bits are to be changed. */
797 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
798 value is found, 0 is no bits are to be changed. This is
799 applied BEFORE setmask */
802 /* Set this bit in arg_required to allow empty arguments */
803 #define REISERFS_OPT_ALLOWEMPTY 31
805 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
809 int arg_required; /* 0 if argument is not required, not 0 otherwise */
810 const arg_desc_t *values; /* list of values accepted by an option */
811 int setmask; /* bitmask which is to set on mount_options bitmask when this
812 value is found, 0 is no bits are to be changed. */
813 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
814 value is found, 0 is no bits are to be changed. This is
815 applied BEFORE setmask */
818 /* possible values for -o data= */
819 static const arg_desc_t logging_mode[] = {
820 {"ordered", 1 << REISERFS_DATA_ORDERED,
821 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
822 {"journal", 1 << REISERFS_DATA_LOG,
823 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
824 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
825 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
829 /* possible values for -o barrier= */
830 static const arg_desc_t barrier_mode[] = {
831 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
832 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
836 /* possible values for "-o block-allocator=" and bits which are to be set in
837 s_mount_opt of reiserfs specific part of in-core super block */
838 static const arg_desc_t balloc[] = {
839 {"noborder", 1 << REISERFS_NO_BORDER, 0},
840 {"border", 0, 1 << REISERFS_NO_BORDER},
841 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
842 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
843 {"test4", 1 << REISERFS_TEST4, 0},
844 {"notest4", 0, 1 << REISERFS_TEST4},
848 static const arg_desc_t tails[] = {
849 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
850 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
851 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
855 static const arg_desc_t error_actions[] = {
856 {"panic", 1 << REISERFS_ERROR_PANIC,
857 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
858 {"ro-remount", 1 << REISERFS_ERROR_RO,
859 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
860 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
861 {"continue", 1 << REISERFS_ERROR_CONTINUE,
862 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
867 /* proceed only one option from a list *cur - string containing of mount options
868 opts - array of options which are accepted
869 opt_arg - if option is found and requires an argument and if it is specifed
870 in the input - pointer to the argument is stored here
871 bit_flags - if option requires to set a certain bit - it is set here
872 return -1 if unknown option is found, opt->arg_required otherwise */
873 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
874 char **opt_arg, unsigned long *bit_flags)
883 const opt_desc_t *opt;
884 const arg_desc_t *arg;
888 /* assume argument cannot contain commas */
889 *cur = strchr(p, ',');
895 if (!strncmp(p, "alloc=", 6)) {
896 /* Ugly special case, probably we should redo options parser so that
897 it can understand several arguments for some options, also so that
898 it can fill several bitfields with option values. */
899 if (reiserfs_parse_alloc_options(s, p + 6)) {
906 /* for every option in the list */
907 for (opt = opts; opt->option_name; opt++) {
908 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
911 (1 << REISERFS_UNSUPPORTED_OPT))
912 reiserfs_warning(s, "super-6500",
913 "%s not supported.\n",
916 *bit_flags &= ~opt->clrmask;
918 (1 << REISERFS_UNSUPPORTED_OPT))
919 reiserfs_warning(s, "super-6501",
920 "%s not supported.\n",
923 *bit_flags |= opt->setmask;
928 if (!opt->option_name) {
929 reiserfs_warning(s, "super-6502",
930 "unknown mount option \"%s\"", p);
934 p += strlen(opt->option_name);
937 if (!opt->arg_required) {
938 reiserfs_warning(s, "super-6503",
939 "the option \"%s\" does not "
940 "require an argument\n",
947 if (opt->arg_required) {
948 reiserfs_warning(s, "super-6504",
949 "the option \"%s\" requires an "
950 "argument\n", opt->option_name);
955 reiserfs_warning(s, "super-6505",
956 "head of option \"%s\" is only correct\n",
961 /* move to the argument, or to next option if argument is not required */
964 if (opt->arg_required
965 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
967 /* this catches "option=," if not allowed */
968 reiserfs_warning(s, "super-6506",
969 "empty argument for \"%s\"\n",
975 /* *=NULLopt_arg contains pointer to argument */
977 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
980 /* values possible for this option are listed in opt->values */
981 for (arg = opt->values; arg->value; arg++) {
982 if (!strcmp(p, arg->value)) {
984 *bit_flags &= ~arg->clrmask;
985 *bit_flags |= arg->setmask;
987 return opt->arg_required;
991 reiserfs_warning(s, "super-6506",
992 "bad value \"%s\" for option \"%s\"\n", p,
997 /* returns 0 if something is wrong in option string, 1 - otherwise */
998 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
999 unsigned long *mount_options,
1000 /* after the parsing phase, contains the
1001 collection of bitflags defining what
1002 mount options were selected. */
1003 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
1005 unsigned int *commit_max_age,
1012 opt_desc_t opts[] = {
1013 /* Compatibility stuff, so that -o notail for old setups still work */
1014 {"tails",.arg_required = 't',.values = tails},
1015 {"notail",.clrmask =
1016 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1017 {"conv",.setmask = 1 << REISERFS_CONVERT},
1018 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1019 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1020 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1021 #ifdef CONFIG_REISERFS_FS_XATTR
1022 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1023 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1025 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1026 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1028 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1029 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1030 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1032 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1033 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1035 {.option_name = "nolog"},
1036 {"replayonly",.setmask = 1 << REPLAYONLY},
1037 {"block-allocator",.arg_required = 'a',.values = balloc},
1038 {"data",.arg_required = 'd',.values = logging_mode},
1039 {"barrier",.arg_required = 'b',.values = barrier_mode},
1040 {"resize",.arg_required = 'r',.values = NULL},
1041 {"jdev",.arg_required = 'j',.values = NULL},
1042 {"nolargeio",.arg_required = 'w',.values = NULL},
1043 {"commit",.arg_required = 'c',.values = NULL},
1044 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1045 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1046 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1047 {"errors",.arg_required = 'e',.values = error_actions},
1048 {"usrjquota",.arg_required =
1049 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1050 {"grpjquota",.arg_required =
1051 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1052 {"jqfmt",.arg_required = 'f',.values = NULL},
1053 {.option_name = NULL}
1057 if (!options || !*options)
1058 /* use default configuration: create tails, journaling on, no
1059 conversion to newest format */
1062 for (pos = options; pos;) {
1063 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1065 /* wrong option is given */
1072 /* "resize=NNN" or "resize=auto" */
1074 if (!strcmp(arg, "auto")) {
1075 /* From JFS code, to auto-get the size. */
1077 s->s_bdev->bd_inode->i_size >> s->
1080 *blocks = simple_strtoul(arg, &p, 0);
1082 /* NNN does not look like a number */
1083 reiserfs_warning(s, "super-6507",
1093 unsigned long val = simple_strtoul(arg, &p, 0);
1094 /* commit=NNN (time in seconds) */
1095 if (*p != '\0' || val >= (unsigned int)-1) {
1096 reiserfs_warning(s, "super-6508",
1097 "bad value %s for -ocommit\n",
1101 *commit_max_age = (unsigned int)val;
1105 reiserfs_warning(s, "super-6509", "nolargeio option "
1106 "is no longer supported");
1111 if (arg && *arg && jdev_name) {
1112 if (*jdev_name) { //Hm, already assigned?
1113 reiserfs_warning(s, "super-6510",
1114 "journal device was "
1115 "already specified to "
1116 "be %s", *jdev_name);
1123 if (c == 'u' || c == 'g') {
1124 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1126 if (sb_any_quota_loaded(s) &&
1127 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1128 reiserfs_warning(s, "super-6511",
1129 "cannot change journaled "
1130 "quota options when quota "
1134 if (*arg) { /* Some filename specified? */
1135 if (REISERFS_SB(s)->s_qf_names[qtype]
1136 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1138 reiserfs_warning(s, "super-6512",
1140 "already specified.",
1144 if (strchr(arg, '/')) {
1145 reiserfs_warning(s, "super-6513",
1146 "quotafile must be "
1147 "on filesystem root.");
1150 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1151 if (!qf_names[qtype]) {
1152 reiserfs_warning(s, "reiserfs-2502",
1153 "not enough memory "
1158 if (qtype == USRQUOTA)
1159 *mount_options |= 1 << REISERFS_USRQUOTA;
1161 *mount_options |= 1 << REISERFS_GRPQUOTA;
1163 if (qf_names[qtype] !=
1164 REISERFS_SB(s)->s_qf_names[qtype])
1165 kfree(qf_names[qtype]);
1166 qf_names[qtype] = NULL;
1167 if (qtype == USRQUOTA)
1168 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1170 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1174 if (!strcmp(arg, "vfsold"))
1175 *qfmt = QFMT_VFS_OLD;
1176 else if (!strcmp(arg, "vfsv0"))
1177 *qfmt = QFMT_VFS_V0;
1179 reiserfs_warning(s, "super-6514",
1180 "unknown quota format "
1184 if (sb_any_quota_loaded(s) &&
1185 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1186 reiserfs_warning(s, "super-6515",
1187 "cannot change journaled "
1188 "quota options when quota "
1194 if (c == 'u' || c == 'g' || c == 'f') {
1195 reiserfs_warning(s, "reiserfs-2503", "journaled "
1196 "quota options not supported.");
1203 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1204 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1205 reiserfs_warning(s, "super-6515",
1206 "journaled quota format not specified.");
1209 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1210 sb_has_quota_loaded(s, USRQUOTA)) ||
1211 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1212 sb_has_quota_loaded(s, GRPQUOTA))) {
1213 reiserfs_warning(s, "super-6516", "quota options must "
1214 "be present when quota is turned on.");
1222 static void switch_data_mode(struct super_block *s, unsigned long mode)
1224 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1225 (1 << REISERFS_DATA_ORDERED) |
1226 (1 << REISERFS_DATA_WRITEBACK));
1227 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1230 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1232 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1233 if (!reiserfs_data_log(s)) {
1234 switch_data_mode(s, REISERFS_DATA_LOG);
1235 reiserfs_info(s, "switching to journaled data mode\n");
1237 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1238 if (!reiserfs_data_ordered(s)) {
1239 switch_data_mode(s, REISERFS_DATA_ORDERED);
1240 reiserfs_info(s, "switching to ordered data mode\n");
1242 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1243 if (!reiserfs_data_writeback(s)) {
1244 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1245 reiserfs_info(s, "switching to writeback data mode\n");
1250 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1252 int flush = (1 << REISERFS_BARRIER_FLUSH);
1253 int none = (1 << REISERFS_BARRIER_NONE);
1254 int all_barrier = flush | none;
1256 if (bits & all_barrier) {
1257 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1259 REISERFS_SB(s)->s_mount_opt |= flush;
1260 printk("reiserfs: enabling write barrier flush mode\n");
1261 } else if (bits & none) {
1262 REISERFS_SB(s)->s_mount_opt |= none;
1263 printk("reiserfs: write barriers turned off\n");
1268 static void handle_attrs(struct super_block *s)
1270 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1272 if (reiserfs_attrs(s)) {
1273 if (old_format_only(s)) {
1274 reiserfs_warning(s, "super-6517", "cannot support "
1275 "attributes on 3.5.x disk format");
1276 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1279 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1280 reiserfs_warning(s, "super-6518", "cannot support "
1281 "attributes until flag is set in "
1283 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1289 static void handle_quota_files(struct super_block *s, char **qf_names,
1294 for (i = 0; i < MAXQUOTAS; i++) {
1295 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1296 kfree(REISERFS_SB(s)->s_qf_names[i]);
1297 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1300 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1304 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1306 struct reiserfs_super_block *rs;
1307 struct reiserfs_transaction_handle th;
1308 unsigned long blocks;
1309 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1310 unsigned long safe_mask = 0;
1311 unsigned int commit_max_age = (unsigned int)-1;
1312 struct reiserfs_journal *journal = SB_JOURNAL(s);
1313 char *new_opts = kstrdup(arg, GFP_KERNEL);
1315 char *qf_names[MAXQUOTAS];
1316 unsigned int qfmt = 0;
1321 reiserfs_write_lock(s);
1324 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1327 rs = SB_DISK_SUPER_BLOCK(s);
1329 if (!reiserfs_parse_options
1330 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1333 for (i = 0; i < MAXQUOTAS; i++)
1334 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1338 goto out_err_unlock;
1341 handle_quota_files(s, qf_names, &qfmt);
1346 /* Add options that are safe here */
1347 safe_mask |= 1 << REISERFS_SMALLTAIL;
1348 safe_mask |= 1 << REISERFS_LARGETAIL;
1349 safe_mask |= 1 << REISERFS_NO_BORDER;
1350 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1351 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1352 safe_mask |= 1 << REISERFS_TEST4;
1353 safe_mask |= 1 << REISERFS_ATTRS;
1354 safe_mask |= 1 << REISERFS_XATTRS_USER;
1355 safe_mask |= 1 << REISERFS_POSIXACL;
1356 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1357 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1358 safe_mask |= 1 << REISERFS_ERROR_RO;
1359 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1360 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1361 safe_mask |= 1 << REISERFS_USRQUOTA;
1362 safe_mask |= 1 << REISERFS_GRPQUOTA;
1364 /* Update the bitmask, taking care to keep
1365 * the bits we're not allowed to change here */
1366 REISERFS_SB(s)->s_mount_opt =
1368 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1370 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1371 journal->j_max_commit_age = commit_max_age;
1372 journal->j_max_trans_age = commit_max_age;
1373 } else if (commit_max_age == 0) {
1374 /* 0 means restore defaults. */
1375 journal->j_max_commit_age = journal->j_default_max_commit_age;
1376 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1380 err = reiserfs_resize(s, blocks);
1382 goto out_err_unlock;
1385 if (*mount_flags & MS_RDONLY) {
1386 reiserfs_write_unlock(s);
1387 reiserfs_xattr_init(s, *mount_flags);
1388 /* remount read-only */
1389 if (s->s_flags & MS_RDONLY)
1390 /* it is read-only already */
1391 goto out_ok_unlocked;
1393 err = dquot_suspend(s, -1);
1397 /* try to remount file system with read-only permissions */
1398 if (sb_umount_state(rs) == REISERFS_VALID_FS
1399 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1400 goto out_ok_unlocked;
1403 reiserfs_write_lock(s);
1405 err = journal_begin(&th, s, 10);
1407 goto out_err_unlock;
1409 /* Mounting a rw partition read-only. */
1410 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1411 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1412 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1414 /* remount read-write */
1415 if (!(s->s_flags & MS_RDONLY)) {
1416 reiserfs_write_unlock(s);
1417 reiserfs_xattr_init(s, *mount_flags);
1418 goto out_ok_unlocked; /* We are read-write already */
1421 if (reiserfs_is_journal_aborted(journal)) {
1422 err = journal->j_errno;
1423 goto out_err_unlock;
1426 handle_data_mode(s, mount_options);
1427 handle_barrier_mode(s, mount_options);
1428 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1429 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1430 err = journal_begin(&th, s, 10);
1432 goto out_err_unlock;
1434 /* Mount a partition which is read-only, read-write */
1435 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1436 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1437 s->s_flags &= ~MS_RDONLY;
1438 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1439 if (!old_format_only(s))
1440 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1441 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1442 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1443 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1445 /* this will force a full flush of all journal lists */
1446 SB_JOURNAL(s)->j_must_wait = 1;
1447 err = journal_end(&th, s, 10);
1449 goto out_err_unlock;
1451 reiserfs_write_unlock(s);
1452 if (!(*mount_flags & MS_RDONLY)) {
1453 dquot_resume(s, -1);
1454 reiserfs_write_lock(s);
1455 finish_unfinished(s);
1456 reiserfs_write_unlock(s);
1457 reiserfs_xattr_init(s, *mount_flags);
1461 replace_mount_options(s, new_opts);
1465 reiserfs_write_unlock(s);
1471 static int read_super_block(struct super_block *s, int offset)
1473 struct buffer_head *bh;
1474 struct reiserfs_super_block *rs;
1477 bh = sb_bread(s, offset / s->s_blocksize);
1479 reiserfs_warning(s, "sh-2006",
1480 "bread failed (dev %s, block %lu, size %lu)",
1481 reiserfs_bdevname(s), offset / s->s_blocksize,
1486 rs = (struct reiserfs_super_block *)bh->b_data;
1487 if (!is_any_reiserfs_magic_string(rs)) {
1492 // ok, reiserfs signature (old or new) found in at the given offset
1494 fs_blocksize = sb_blocksize(rs);
1496 sb_set_blocksize(s, fs_blocksize);
1498 bh = sb_bread(s, offset / s->s_blocksize);
1500 reiserfs_warning(s, "sh-2007",
1501 "bread failed (dev %s, block %lu, size %lu)",
1502 reiserfs_bdevname(s), offset / s->s_blocksize,
1507 rs = (struct reiserfs_super_block *)bh->b_data;
1508 if (sb_blocksize(rs) != s->s_blocksize) {
1509 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1510 "filesystem on (dev %s, block %Lu, size %lu)",
1511 reiserfs_bdevname(s),
1512 (unsigned long long)bh->b_blocknr,
1518 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1520 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1521 "--rebuild-tree run detected. Please run\n"
1522 "reiserfsck --rebuild-tree and wait for a "
1523 "completion. If that fails\n"
1524 "get newer reiserfsprogs package");
1528 SB_BUFFER_WITH_SB(s) = bh;
1529 SB_DISK_SUPER_BLOCK(s) = rs;
1531 if (is_reiserfs_jr(rs)) {
1532 /* magic is of non-standard journal filesystem, look at s_version to
1533 find which format is in use */
1534 if (sb_version(rs) == REISERFS_VERSION_2)
1535 reiserfs_info(s, "found reiserfs format \"3.6\""
1536 " with non-standard journal\n");
1537 else if (sb_version(rs) == REISERFS_VERSION_1)
1538 reiserfs_info(s, "found reiserfs format \"3.5\""
1539 " with non-standard journal\n");
1541 reiserfs_warning(s, "sh-2012", "found unknown "
1542 "format \"%u\" of reiserfs with "
1543 "non-standard magic", sb_version(rs));
1547 /* s_version of standard format may contain incorrect information,
1548 so we just look at the magic string */
1550 "found reiserfs format \"%s\" with standard journal\n",
1551 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1553 s->s_op = &reiserfs_sops;
1554 s->s_export_op = &reiserfs_export_ops;
1556 s->s_qcop = &reiserfs_qctl_operations;
1557 s->dq_op = &reiserfs_quota_operations;
1560 /* new format is limited by the 32 bit wide i_blocks field, want to
1561 ** be one full block below that.
1563 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1567 /* after journal replay, reread all bitmap and super blocks */
1568 static int reread_meta_blocks(struct super_block *s)
1570 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1571 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1572 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1573 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1580 /////////////////////////////////////////////////////
1581 // hash detection stuff
1583 // if root directory is empty - we set default - Yura's - hash and
1585 // FIXME: we look for only one name in a directory. If tea and yura
1586 // bith have the same value - we ask user to send report to the
1588 static __u32 find_hash_out(struct super_block *s)
1591 struct inode *inode;
1593 INITIALIZE_PATH(path);
1594 struct reiserfs_dir_entry de;
1595 __u32 hash = DEFAULT_HASH;
1597 inode = s->s_root->d_inode;
1599 do { // Some serious "goto"-hater was there ;)
1600 u32 teahash, r5hash, yurahash;
1602 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1603 retval = search_by_entry_key(s, &key, &path, &de);
1604 if (retval == IO_ERROR) {
1608 if (retval == NAME_NOT_FOUND)
1610 set_de_name_and_namelen(&de);
1611 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1612 /* allow override in this case */
1613 if (reiserfs_rupasov_hash(s)) {
1616 reiserfs_info(s, "FS seems to be empty, autodetect "
1617 "is using the default hash\n");
1620 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1621 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1622 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1623 if (((teahash == r5hash)
1625 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1626 == r5hash)) || ((teahash == yurahash)
1628 GET_HASH_VALUE(deh_offset
1633 || ((r5hash == yurahash)
1635 GET_HASH_VALUE(deh_offset
1636 (&(de.de_deh[de.de_entry_num])))))) {
1637 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1638 "automatically detect hash function. "
1639 "Please mount with -o "
1640 "hash={tea,rupasov,r5}");
1644 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1647 else if (GET_HASH_VALUE
1648 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1650 else if (GET_HASH_VALUE
1651 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1654 reiserfs_warning(s, "reiserfs-2506",
1655 "Unrecognised hash function");
1664 // finds out which hash names are sorted with
1665 static int what_hash(struct super_block *s)
1669 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1671 /* reiserfs_hash_detect() == true if any of the hash mount options
1672 ** were used. We must check them to make sure the user isn't
1673 ** using a bad hash value
1675 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1676 code = find_hash_out(s);
1678 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1679 /* detection has found the hash, and we must check against the
1682 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1683 reiserfs_warning(s, "reiserfs-2507",
1684 "Error, %s hash detected, "
1685 "unable to force rupasov hash",
1686 reiserfs_hashname(code));
1688 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1689 reiserfs_warning(s, "reiserfs-2508",
1690 "Error, %s hash detected, "
1691 "unable to force tea hash",
1692 reiserfs_hashname(code));
1694 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1695 reiserfs_warning(s, "reiserfs-2509",
1696 "Error, %s hash detected, "
1697 "unable to force r5 hash",
1698 reiserfs_hashname(code));
1702 /* find_hash_out was not called or could not determine the hash */
1703 if (reiserfs_rupasov_hash(s)) {
1705 } else if (reiserfs_tea_hash(s)) {
1707 } else if (reiserfs_r5_hash(s)) {
1712 /* if we are mounted RW, and we have a new valid hash code, update
1715 if (code != UNSET_HASH &&
1716 !(s->s_flags & MS_RDONLY) &&
1717 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1718 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1723 // return pointer to appropriate function
1724 static hashf_t hash_function(struct super_block *s)
1726 switch (what_hash(s)) {
1728 reiserfs_info(s, "Using tea hash to sort names\n");
1731 reiserfs_info(s, "Using rupasov hash to sort names\n");
1734 reiserfs_info(s, "Using r5 hash to sort names\n");
1740 // this is used to set up correct value for old partitions
1741 static int function2code(hashf_t func)
1743 if (func == keyed_hash)
1745 if (func == yura_hash)
1747 if (func == r5_hash)
1750 BUG(); // should never happen
1755 #define SWARN(silent, s, id, ...) \
1757 reiserfs_warning(s, id, __VA_ARGS__)
1759 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1761 struct inode *root_inode;
1762 struct reiserfs_transaction_handle th;
1764 unsigned long blocks;
1765 unsigned int commit_max_age = 0;
1767 struct reiserfs_iget_args args;
1768 struct reiserfs_super_block *rs;
1770 struct reiserfs_sb_info *sbi;
1771 int errval = -EINVAL;
1772 char *qf_names[MAXQUOTAS] = {};
1773 unsigned int qfmt = 0;
1775 save_mount_options(s, data);
1777 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1781 /* Set default values for options: non-aggressive tails, RO on errors */
1782 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1783 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1784 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1785 /* no preallocation minimum, be smart in
1786 reiserfs_file_write instead */
1787 sbi->s_alloc_options.preallocmin = 0;
1788 /* Preallocate by 16 blocks (17-1) at once */
1789 sbi->s_alloc_options.preallocsize = 17;
1790 /* setup default block allocator options */
1791 reiserfs_init_alloc_options(s);
1793 spin_lock_init(&sbi->old_work_lock);
1794 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1795 mutex_init(&sbi->lock);
1796 sbi->lock_depth = -1;
1799 if (reiserfs_parse_options
1800 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1801 &commit_max_age, qf_names, &qfmt) == 0) {
1802 goto error_unlocked;
1804 if (jdev_name && jdev_name[0]) {
1805 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1807 SWARN(silent, s, "", "Cannot allocate memory for "
1808 "journal device name");
1813 handle_quota_files(s, qf_names, &qfmt);
1817 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1818 goto error_unlocked;
1821 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1822 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1824 /* try new format (64-th 1k block), which can contain reiserfs super block */
1825 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1826 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1827 reiserfs_bdevname(s));
1828 goto error_unlocked;
1831 rs = SB_DISK_SUPER_BLOCK(s);
1832 /* Let's do basic sanity check to verify that underlying device is not
1833 smaller than the filesystem. If the check fails then abort and scream,
1834 because bad stuff will happen otherwise. */
1835 if (s->s_bdev && s->s_bdev->bd_inode
1836 && i_size_read(s->s_bdev->bd_inode) <
1837 sb_block_count(rs) * sb_blocksize(rs)) {
1838 SWARN(silent, s, "", "Filesystem cannot be "
1839 "mounted because it is bigger than the device");
1840 SWARN(silent, s, "", "You may need to run fsck "
1841 "or increase size of your LVM partition");
1842 SWARN(silent, s, "", "Or may be you forgot to "
1843 "reboot after fdisk when it told you to");
1844 goto error_unlocked;
1847 sbi->s_mount_state = SB_REISERFS_STATE(s);
1848 sbi->s_mount_state = REISERFS_VALID_FS;
1850 if ((errval = reiserfs_init_bitmap_cache(s))) {
1851 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1852 goto error_unlocked;
1856 #ifdef CONFIG_REISERFS_CHECK
1857 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1858 SWARN(silent, s, "", "- it is slow mode for debugging.");
1861 /* make data=ordered the default */
1862 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1863 !reiserfs_data_writeback(s)) {
1864 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1867 if (reiserfs_data_log(s)) {
1868 reiserfs_info(s, "using journaled data mode\n");
1869 } else if (reiserfs_data_ordered(s)) {
1870 reiserfs_info(s, "using ordered data mode\n");
1872 reiserfs_info(s, "using writeback data mode\n");
1874 if (reiserfs_barrier_flush(s)) {
1875 printk("reiserfs: using flush barriers\n");
1878 // set_device_ro(s->s_dev, 1) ;
1879 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1880 SWARN(silent, s, "sh-2022",
1881 "unable to initialize journal space");
1882 goto error_unlocked;
1884 jinit_done = 1; /* once this is set, journal_release must be called
1885 ** if we error out of the mount
1889 if (reread_meta_blocks(s)) {
1890 SWARN(silent, s, "jmacd-9",
1891 "unable to reread meta blocks after journal init");
1892 goto error_unlocked;
1896 goto error_unlocked;
1898 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1899 SWARN(silent, s, "clm-7000",
1900 "Detected readonly device, marking FS readonly");
1901 s->s_flags |= MS_RDONLY;
1903 args.objectid = REISERFS_ROOT_OBJECTID;
1904 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1906 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1907 reiserfs_init_locked_inode, (void *)(&args));
1909 SWARN(silent, s, "jmacd-10", "get root inode failed");
1910 goto error_unlocked;
1914 * This path assumed to be called with the BKL in the old times.
1915 * Now we have inherited the big reiserfs lock from it and many
1916 * reiserfs helpers called in the mount path and elsewhere require
1917 * this lock to be held even if it's not always necessary. Let's be
1918 * conservative and hold it early. The window can be reduced after
1919 * careful review of the code.
1921 reiserfs_write_lock(s);
1923 if (root_inode->i_state & I_NEW) {
1924 reiserfs_read_locked_inode(root_inode, &args);
1925 unlock_new_inode(root_inode);
1928 s->s_root = d_make_root(root_inode);
1931 // define and initialize hash function
1932 sbi->s_hash_function = hash_function(s);
1933 if (sbi->s_hash_function == NULL) {
1939 if (is_reiserfs_3_5(rs)
1940 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1941 set_bit(REISERFS_3_5, &(sbi->s_properties));
1942 else if (old_format)
1943 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1945 set_bit(REISERFS_3_6, &(sbi->s_properties));
1947 if (!(s->s_flags & MS_RDONLY)) {
1949 errval = journal_begin(&th, s, 1);
1955 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1957 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1958 set_sb_fs_state(rs, 0);
1960 /* Clear out s_bmap_nr if it would wrap. We can handle this
1961 * case, but older revisions can't. This will cause the
1962 * file system to fail mount on those older implementations,
1963 * avoiding corruption. -jeffm */
1964 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1965 sb_bmap_nr(rs) != 0) {
1966 reiserfs_warning(s, "super-2030", "This file system "
1967 "claims to use %u bitmap blocks in "
1968 "its super block, but requires %u. "
1969 "Clearing to zero.", sb_bmap_nr(rs),
1970 reiserfs_bmap_count(s));
1972 set_sb_bmap_nr(rs, 0);
1975 if (old_format_only(s)) {
1976 /* filesystem of format 3.5 either with standard or non-standard
1978 if (convert_reiserfs(s)) {
1979 /* and -o conv is given */
1982 "converting 3.5 filesystem to the 3.6 format");
1984 if (is_reiserfs_3_5(rs))
1985 /* put magic string of 3.6 format. 2.2 will not be able to
1986 mount this filesystem anymore */
1987 memcpy(rs->s_v1.s_magic,
1988 reiserfs_3_6_magic_string,
1990 (reiserfs_3_6_magic_string));
1992 set_sb_version(rs, REISERFS_VERSION_2);
1993 reiserfs_convert_objectid_map_v1(s);
1994 set_bit(REISERFS_3_6, &(sbi->s_properties));
1995 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1996 } else if (!silent) {
1997 reiserfs_info(s, "using 3.5.x disk format\n");
2000 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2003 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
2004 errval = journal_end(&th, s, 1);
2011 reiserfs_write_unlock(s);
2012 if ((errval = reiserfs_lookup_privroot(s)) ||
2013 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2016 goto error_unlocked;
2018 reiserfs_write_lock(s);
2020 /* look for files which were to be removed in previous session */
2021 finish_unfinished(s);
2023 if (old_format_only(s) && !silent) {
2024 reiserfs_info(s, "using 3.5.x disk format\n");
2027 reiserfs_write_unlock(s);
2028 if ((errval = reiserfs_lookup_privroot(s)) ||
2029 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2032 goto error_unlocked;
2034 reiserfs_write_lock(s);
2036 // mark hash in super block: it could be unset. overwrite should be ok
2037 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2041 reiserfs_proc_info_init(s);
2043 init_waitqueue_head(&(sbi->s_wait));
2044 spin_lock_init(&sbi->bitmap_lock);
2046 reiserfs_write_unlock(s);
2051 reiserfs_write_unlock(s);
2054 /* kill the commit thread, free journal ram */
2056 reiserfs_write_lock(s);
2057 journal_release_error(NULL, s);
2058 reiserfs_write_unlock(s);
2061 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
2063 reiserfs_free_bitmap_cache(s);
2064 if (SB_BUFFER_WITH_SB(s))
2065 brelse(SB_BUFFER_WITH_SB(s));
2069 for (j = 0; j < MAXQUOTAS; j++)
2075 s->s_fs_info = NULL;
2079 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2081 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2083 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2084 buf->f_bfree = sb_free_blocks(rs);
2085 buf->f_bavail = buf->f_bfree;
2086 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2087 buf->f_bsize = dentry->d_sb->s_blocksize;
2088 /* changed to accommodate gcc folks. */
2089 buf->f_type = REISERFS_SUPER_MAGIC;
2090 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2091 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2092 sizeof(rs->s_uuid)/2);
2098 static int reiserfs_write_dquot(struct dquot *dquot)
2100 struct reiserfs_transaction_handle th;
2103 reiserfs_write_lock(dquot->dq_sb);
2105 journal_begin(&th, dquot->dq_sb,
2106 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2109 reiserfs_write_unlock(dquot->dq_sb);
2110 ret = dquot_commit(dquot);
2111 reiserfs_write_lock(dquot->dq_sb);
2113 journal_end(&th, dquot->dq_sb,
2114 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2118 reiserfs_write_unlock(dquot->dq_sb);
2122 static int reiserfs_acquire_dquot(struct dquot *dquot)
2124 struct reiserfs_transaction_handle th;
2127 reiserfs_write_lock(dquot->dq_sb);
2129 journal_begin(&th, dquot->dq_sb,
2130 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2133 reiserfs_write_unlock(dquot->dq_sb);
2134 ret = dquot_acquire(dquot);
2135 reiserfs_write_lock(dquot->dq_sb);
2137 journal_end(&th, dquot->dq_sb,
2138 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2142 reiserfs_write_unlock(dquot->dq_sb);
2146 static int reiserfs_release_dquot(struct dquot *dquot)
2148 struct reiserfs_transaction_handle th;
2151 reiserfs_write_lock(dquot->dq_sb);
2153 journal_begin(&th, dquot->dq_sb,
2154 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2155 reiserfs_write_unlock(dquot->dq_sb);
2157 /* Release dquot anyway to avoid endless cycle in dqput() */
2158 dquot_release(dquot);
2161 ret = dquot_release(dquot);
2162 reiserfs_write_lock(dquot->dq_sb);
2164 journal_end(&th, dquot->dq_sb,
2165 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2168 reiserfs_write_unlock(dquot->dq_sb);
2173 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2175 /* Are we journaling quotas? */
2176 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2177 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2178 dquot_mark_dquot_dirty(dquot);
2179 return reiserfs_write_dquot(dquot);
2181 return dquot_mark_dquot_dirty(dquot);
2184 static int reiserfs_write_info(struct super_block *sb, int type)
2186 struct reiserfs_transaction_handle th;
2189 /* Data block + inode block */
2190 reiserfs_write_lock(sb);
2191 ret = journal_begin(&th, sb, 2);
2194 reiserfs_write_unlock(sb);
2195 ret = dquot_commit_info(sb, type);
2196 reiserfs_write_lock(sb);
2197 err = journal_end(&th, sb, 2);
2201 reiserfs_write_unlock(sb);
2206 * Turn on quotas during mount time - we need to find the quota file and such...
2208 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2210 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2211 REISERFS_SB(sb)->s_jquota_fmt, type);
2215 * Standard function to be called on quota_on
2217 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2221 struct inode *inode;
2222 struct reiserfs_transaction_handle th;
2223 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2225 reiserfs_write_lock(sb);
2226 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2231 /* Quotafile not on the same filesystem? */
2232 if (path->dentry->d_sb != sb) {
2236 inode = path->dentry->d_inode;
2237 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2238 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2239 err = reiserfs_unpack(inode, NULL);
2241 reiserfs_warning(sb, "super-6520",
2242 "Unpacking tail of quota file failed"
2243 " (%d). Cannot turn on quotas.", err);
2247 mark_inode_dirty(inode);
2249 /* Journaling quota? */
2250 if (REISERFS_SB(sb)->s_qf_names[type]) {
2251 /* Quotafile not of fs root? */
2252 if (path->dentry->d_parent != sb->s_root)
2253 reiserfs_warning(sb, "super-6521",
2254 "Quota file not on filesystem root. "
2255 "Journalled quota will not work.");
2259 * When we journal data on quota file, we have to flush journal to see
2260 * all updates to the file when we bypass pagecache...
2262 if (reiserfs_file_data_log(inode)) {
2263 /* Just start temporary transaction and finish it */
2264 err = journal_begin(&th, sb, 1);
2267 err = journal_end_sync(&th, sb, 1);
2271 reiserfs_write_unlock(sb);
2272 return dquot_quota_on(sb, type, format_id, path);
2274 reiserfs_write_unlock(sb);
2278 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2279 * acquiring the locks... As quota files are never truncated and quota code
2280 * itself serializes the operations (and no one else should touch the files)
2281 * we don't have to be afraid of races */
2282 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2283 size_t len, loff_t off)
2285 struct inode *inode = sb_dqopt(sb)->files[type];
2286 unsigned long blk = off >> sb->s_blocksize_bits;
2287 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2289 struct buffer_head tmp_bh, *bh;
2290 loff_t i_size = i_size_read(inode);
2294 if (off + len > i_size)
2297 while (toread > 0) {
2299 sb->s_blocksize - offset <
2300 toread ? sb->s_blocksize - offset : toread;
2302 /* Quota files are without tails so we can safely use this function */
2303 reiserfs_write_lock(sb);
2304 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2305 reiserfs_write_unlock(sb);
2308 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2309 memset(data, 0, tocopy);
2311 bh = sb_bread(sb, tmp_bh.b_blocknr);
2314 memcpy(data, bh->b_data + offset, tocopy);
2325 /* Write to quotafile (we know the transaction is already started and has
2326 * enough credits) */
2327 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2328 const char *data, size_t len, loff_t off)
2330 struct inode *inode = sb_dqopt(sb)->files[type];
2331 unsigned long blk = off >> sb->s_blocksize_bits;
2332 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2333 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2334 size_t towrite = len;
2335 struct buffer_head tmp_bh, *bh;
2337 if (!current->journal_info) {
2338 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2339 " cancelled because transaction is not started.\n",
2340 (unsigned long long)off, (unsigned long long)len);
2343 while (towrite > 0) {
2344 tocopy = sb->s_blocksize - offset < towrite ?
2345 sb->s_blocksize - offset : towrite;
2347 reiserfs_write_lock(sb);
2348 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2349 reiserfs_write_unlock(sb);
2352 if (offset || tocopy != sb->s_blocksize)
2353 bh = sb_bread(sb, tmp_bh.b_blocknr);
2355 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2361 memcpy(bh->b_data + offset, data, tocopy);
2362 flush_dcache_page(bh->b_page);
2363 set_buffer_uptodate(bh);
2365 reiserfs_write_lock(sb);
2366 reiserfs_prepare_for_journal(sb, bh, 1);
2367 journal_mark_dirty(current->journal_info, sb, bh);
2369 reiserfs_add_ordered_list(inode, bh);
2370 reiserfs_write_unlock(sb);
2380 if (inode->i_size < off + len - towrite)
2381 i_size_write(inode, off + len - towrite);
2383 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2384 mark_inode_dirty(inode);
2385 return len - towrite;
2390 static struct dentry *get_super_block(struct file_system_type *fs_type,
2391 int flags, const char *dev_name,
2394 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2397 static int __init init_reiserfs_fs(void)
2401 if ((ret = init_inodecache())) {
2405 reiserfs_proc_info_global_init();
2407 ret = register_filesystem(&reiserfs_fs_type);
2413 reiserfs_proc_info_global_done();
2414 destroy_inodecache();
2419 static void __exit exit_reiserfs_fs(void)
2421 reiserfs_proc_info_global_done();
2422 unregister_filesystem(&reiserfs_fs_type);
2423 destroy_inodecache();
2426 struct file_system_type reiserfs_fs_type = {
2427 .owner = THIS_MODULE,
2429 .mount = get_super_block,
2430 .kill_sb = reiserfs_kill_sb,
2431 .fs_flags = FS_REQUIRES_DEV,
2433 MODULE_ALIAS_FS("reiserfs");
2435 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2436 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2437 MODULE_LICENSE("GPL");
2439 module_init(init_reiserfs_fs);
2440 module_exit(exit_reiserfs_fs);