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>
19 #include <linux/reiserfs_fs.h>
20 #include <linux/reiserfs_acl.h>
21 #include <linux/reiserfs_xattr.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;
71 reiserfs_write_lock(s);
72 if (!journal_begin(&th, s, 1))
73 if (!journal_end_sync(&th, s, 1))
74 reiserfs_flush_old_commits(s);
75 s->s_dirt = 0; /* Even if it's not true.
76 * We'll loop forever in sync_supers otherwise */
77 reiserfs_write_unlock(s);
81 static void reiserfs_write_super(struct super_block *s)
83 reiserfs_sync_fs(s, 1);
86 static int reiserfs_freeze(struct super_block *s)
88 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
93 reiserfs_block_writes(&th);
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
103 reiserfs_write_unlock(s);
107 static int reiserfs_unfreeze(struct super_block *s)
109 reiserfs_allow_writes(s);
113 extern const struct in_core_key MAX_IN_CORE_KEY;
115 /* this is used to delete "save link" when there are no items of a
116 file it points to. It can either happen if unlink is completed but
117 "save unlink" removal, or if file has both unlink and truncate
118 pending and as unlink completes first (because key of "save link"
119 protecting unlink is bigger that a key lf "save link" which
120 protects truncate), so there left no items to make truncate
122 static int remove_save_link_only(struct super_block *s,
123 struct reiserfs_key *key, int oid_free)
125 struct reiserfs_transaction_handle th;
128 /* we are going to do one balancing */
129 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
133 reiserfs_delete_solid_item(&th, NULL, key);
135 /* removals are protected by direct items */
136 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
138 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
142 static int reiserfs_quota_on_mount(struct super_block *, int);
145 /* look for uncompleted unlinks and truncates and complete them */
146 static int finish_unfinished(struct super_block *s)
148 INITIALIZE_PATH(path);
149 struct cpu_key max_cpu_key, obj_key;
150 struct reiserfs_key save_link_key, last_inode_key;
152 struct item_head *ih;
153 struct buffer_head *bh;
162 int quota_enabled[MAXQUOTAS];
165 /* compose key to look for "save" links */
166 max_cpu_key.version = KEY_FORMAT_3_5;
167 max_cpu_key.on_disk_key.k_dir_id = ~0U;
168 max_cpu_key.on_disk_key.k_objectid = ~0U;
169 set_cpu_key_k_offset(&max_cpu_key, ~0U);
170 max_cpu_key.key_length = 3;
172 memset(&last_inode_key, 0, sizeof(last_inode_key));
175 /* Needed for iput() to work correctly and not trash data */
176 if (s->s_flags & MS_ACTIVE) {
180 s->s_flags |= MS_ACTIVE;
182 /* Turn on quotas so that they are updated correctly */
183 for (i = 0; i < MAXQUOTAS; i++) {
184 quota_enabled[i] = 1;
185 if (REISERFS_SB(s)->s_qf_names[i]) {
188 if (sb_has_quota_active(s, i)) {
189 quota_enabled[i] = 0;
192 ret = reiserfs_quota_on_mount(s, i);
194 reiserfs_warning(s, "reiserfs-2500",
195 "cannot turn on journaled "
196 "quota: error %d", ret);
202 REISERFS_SB(s)->s_is_unlinked_ok = 1;
204 retval = search_item(s, &max_cpu_key, &path);
205 if (retval != ITEM_NOT_FOUND) {
206 reiserfs_error(s, "vs-2140",
207 "search_by_key returned %d", retval);
211 bh = get_last_bh(&path);
212 item_pos = get_item_pos(&path);
213 if (item_pos != B_NR_ITEMS(bh)) {
214 reiserfs_warning(s, "vs-2060",
215 "wrong position found");
219 ih = B_N_PITEM_HEAD(bh, item_pos);
221 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
222 /* there are no "save" links anymore */
225 save_link_key = ih->ih_key;
226 if (is_indirect_le_ih(ih))
231 /* reiserfs_iget needs k_dirid and k_objectid only */
232 item = B_I_PITEM(bh, ih);
233 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
234 obj_key.on_disk_key.k_objectid =
235 le32_to_cpu(ih->ih_key.k_objectid);
236 obj_key.on_disk_key.k_offset = 0;
237 obj_key.on_disk_key.k_type = 0;
241 inode = reiserfs_iget(s, &obj_key);
243 /* the unlink almost completed, it just did not manage to remove
244 "save" link and release objectid */
245 reiserfs_warning(s, "vs-2180", "iget failed for %K",
247 retval = remove_save_link_only(s, &save_link_key, 1);
251 if (!truncate && inode->i_nlink) {
252 /* file is not unlinked */
253 reiserfs_warning(s, "vs-2185",
254 "file %K is not unlinked",
256 retval = remove_save_link_only(s, &save_link_key, 0);
259 dquot_initialize(inode);
261 if (truncate && S_ISDIR(inode->i_mode)) {
262 /* We got a truncate request for a dir which is impossible.
263 The only imaginable way is to execute unfinished truncate request
264 then boot into old kernel, remove the file and create dir with
266 reiserfs_warning(s, "green-2101",
267 "impossible truncate on a "
268 "directory %k. Please report",
270 retval = remove_save_link_only(s, &save_link_key, 0);
277 REISERFS_I(inode)->i_flags |=
278 i_link_saved_truncate_mask;
279 /* not completed truncate found. New size was committed together
281 reiserfs_info(s, "Truncating %k to %Ld ..",
282 INODE_PKEY(inode), inode->i_size);
283 reiserfs_truncate_file(inode,
285 /*don't update modification time */
287 retval = remove_save_link(inode, truncate);
289 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
290 /* not completed unlink (rmdir) found */
291 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
292 if (memcmp(&last_inode_key, INODE_PKEY(inode),
293 sizeof(last_inode_key))){
294 last_inode_key = *INODE_PKEY(inode);
295 /* removal gets completed in iput */
298 reiserfs_warning(s, "super-2189", "Dead loop "
299 "in finish_unfinished "
300 "detected, just remove "
302 retval = remove_save_link_only(s,
311 REISERFS_SB(s)->s_is_unlinked_ok = 0;
314 /* Turn quotas off */
315 for (i = 0; i < MAXQUOTAS; i++) {
316 if (sb_dqopt(s)->files[i] && quota_enabled[i])
317 dquot_quota_off(s, i);
320 /* Restore the flag back */
321 s->s_flags &= ~MS_ACTIVE;
325 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
326 "Completed\n", done);
330 /* to protect file being unlinked from getting lost we "safe" link files
331 being unlinked. This link will be deleted in the same transaction with last
332 item of file. mounting the filesystem we scan all these links and remove
333 files which almost got lost */
334 void add_save_link(struct reiserfs_transaction_handle *th,
335 struct inode *inode, int truncate)
337 INITIALIZE_PATH(path);
343 BUG_ON(!th->t_trans_id);
345 /* file can only get one "save link" of each kind */
347 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
348 "saved link already exists for truncated inode %lx",
351 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
352 "saved link already exists for unlinked inode %lx",
355 /* setup key of "save" link */
356 key.version = KEY_FORMAT_3_5;
357 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
358 key.on_disk_key.k_objectid = inode->i_ino;
360 /* unlink, rmdir, rename */
361 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
362 set_cpu_key_k_type(&key, TYPE_DIRECT);
364 /* item head of "safe" link */
365 make_le_item_head(&ih, &key, key.version,
366 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
367 4 /*length */ , 0xffff /*free space */ );
370 if (S_ISDIR(inode->i_mode))
371 reiserfs_warning(inode->i_sb, "green-2102",
372 "Adding a truncate savelink for "
373 "a directory %k! Please report",
375 set_cpu_key_k_offset(&key, 1);
376 set_cpu_key_k_type(&key, TYPE_INDIRECT);
378 /* item head of "safe" link */
379 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
380 4 /*length */ , 0 /*free space */ );
384 /* look for its place in the tree */
385 retval = search_item(inode->i_sb, &key, &path);
386 if (retval != ITEM_NOT_FOUND) {
387 if (retval != -ENOSPC)
388 reiserfs_error(inode->i_sb, "vs-2100",
389 "search_by_key (%K) returned %d", &key,
395 /* body of "save" link */
396 link = INODE_PKEY(inode)->k_dir_id;
398 /* put "save" link into tree, don't charge quota to anyone */
400 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
402 if (retval != -ENOSPC)
403 reiserfs_error(inode->i_sb, "vs-2120",
404 "insert_item returned %d", retval);
407 REISERFS_I(inode)->i_flags |=
408 i_link_saved_truncate_mask;
410 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
414 /* this opens transaction unlike add_save_link */
415 int remove_save_link(struct inode *inode, int truncate)
417 struct reiserfs_transaction_handle th;
418 struct reiserfs_key key;
421 /* we are going to do one balancing only */
422 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
426 /* setup key of "save" link */
427 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
428 key.k_objectid = INODE_PKEY(inode)->k_objectid;
430 /* unlink, rmdir, rename */
431 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
432 1 + inode->i_sb->s_blocksize);
433 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
436 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
437 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
441 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
443 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
444 /* don't take quota bytes from anywhere */
445 reiserfs_delete_solid_item(&th, NULL, &key);
447 reiserfs_release_objectid(&th, inode->i_ino);
448 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
450 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
452 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
455 static void reiserfs_kill_sb(struct super_block *s)
457 if (REISERFS_SB(s)) {
458 if (REISERFS_SB(s)->xattr_root) {
459 d_invalidate(REISERFS_SB(s)->xattr_root);
460 dput(REISERFS_SB(s)->xattr_root);
461 REISERFS_SB(s)->xattr_root = NULL;
463 if (REISERFS_SB(s)->priv_root) {
464 d_invalidate(REISERFS_SB(s)->priv_root);
465 dput(REISERFS_SB(s)->priv_root);
466 REISERFS_SB(s)->priv_root = NULL;
473 static void reiserfs_put_super(struct super_block *s)
475 struct reiserfs_transaction_handle th;
478 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
480 reiserfs_write_lock(s);
483 reiserfs_write_super(s);
485 /* change file system state to current state if it was mounted with read-write permissions */
486 if (!(s->s_flags & MS_RDONLY)) {
487 if (!journal_begin(&th, s, 10)) {
488 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
490 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
491 REISERFS_SB(s)->s_mount_state);
492 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
496 /* note, journal_release checks for readonly mount, and can decide not
497 ** to do a journal_end
499 journal_release(&th, s);
501 reiserfs_free_bitmap_cache(s);
503 brelse(SB_BUFFER_WITH_SB(s));
507 if (REISERFS_SB(s)->reserved_blocks != 0) {
508 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
509 REISERFS_SB(s)->reserved_blocks);
512 reiserfs_proc_info_done(s);
514 reiserfs_write_unlock(s);
515 mutex_destroy(&REISERFS_SB(s)->lock);
520 static struct kmem_cache *reiserfs_inode_cachep;
522 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
524 struct reiserfs_inode_info *ei;
525 ei = (struct reiserfs_inode_info *)
526 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
529 atomic_set(&ei->openers, 0);
530 mutex_init(&ei->tailpack);
531 return &ei->vfs_inode;
534 static void reiserfs_i_callback(struct rcu_head *head)
536 struct inode *inode = container_of(head, struct inode, i_rcu);
537 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
540 static void reiserfs_destroy_inode(struct inode *inode)
542 call_rcu(&inode->i_rcu, reiserfs_i_callback);
545 static void init_once(void *foo)
547 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
549 INIT_LIST_HEAD(&ei->i_prealloc_list);
550 inode_init_once(&ei->vfs_inode);
553 static int init_inodecache(void)
555 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
557 reiserfs_inode_info),
558 0, (SLAB_RECLAIM_ACCOUNT|
561 if (reiserfs_inode_cachep == NULL)
566 static void destroy_inodecache(void)
568 kmem_cache_destroy(reiserfs_inode_cachep);
571 /* we don't mark inodes dirty, we just log them */
572 static void reiserfs_dirty_inode(struct inode *inode, int flags)
574 struct reiserfs_transaction_handle th;
579 if (inode->i_sb->s_flags & MS_RDONLY) {
580 reiserfs_warning(inode->i_sb, "clm-6006",
581 "writing inode %lu on readonly FS",
585 lock_depth = reiserfs_write_lock_once(inode->i_sb);
587 /* this is really only used for atime updates, so they don't have
588 ** to be included in O_SYNC or fsync
590 err = journal_begin(&th, inode->i_sb, 1);
594 reiserfs_update_sd(&th, inode);
595 journal_end(&th, inode->i_sb, 1);
598 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
601 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
603 struct super_block *s = root->d_sb;
604 struct reiserfs_journal *journal = SB_JOURNAL(s);
605 long opts = REISERFS_SB(s)->s_mount_opt;
607 if (opts & (1 << REISERFS_LARGETAIL))
608 seq_puts(seq, ",tails=on");
609 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
610 seq_puts(seq, ",notail");
611 /* tails=small is default so we don't show it */
613 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
614 seq_puts(seq, ",barrier=none");
615 /* barrier=flush is default so we don't show it */
617 if (opts & (1 << REISERFS_ERROR_CONTINUE))
618 seq_puts(seq, ",errors=continue");
619 else if (opts & (1 << REISERFS_ERROR_PANIC))
620 seq_puts(seq, ",errors=panic");
621 /* errors=ro is default so we don't show it */
623 if (opts & (1 << REISERFS_DATA_LOG))
624 seq_puts(seq, ",data=journal");
625 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
626 seq_puts(seq, ",data=writeback");
627 /* data=ordered is default so we don't show it */
629 if (opts & (1 << REISERFS_ATTRS))
630 seq_puts(seq, ",attrs");
632 if (opts & (1 << REISERFS_XATTRS_USER))
633 seq_puts(seq, ",user_xattr");
635 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
636 seq_puts(seq, ",expose_privroot");
638 if (opts & (1 << REISERFS_POSIXACL))
639 seq_puts(seq, ",acl");
641 if (REISERFS_SB(s)->s_jdev)
642 seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
644 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
645 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
648 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
649 seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
650 else if (opts & (1 << REISERFS_USRQUOTA))
651 seq_puts(seq, ",usrquota");
652 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
653 seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
654 else if (opts & (1 << REISERFS_GRPQUOTA))
655 seq_puts(seq, ",grpquota");
656 if (REISERFS_SB(s)->s_jquota_fmt) {
657 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
658 seq_puts(seq, ",jqfmt=vfsold");
659 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
660 seq_puts(seq, ",jqfmt=vfsv0");
664 /* Block allocator options */
665 if (opts & (1 << REISERFS_NO_BORDER))
666 seq_puts(seq, ",block-allocator=noborder");
667 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
668 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
669 if (opts & (1 << REISERFS_HASHED_RELOCATION))
670 seq_puts(seq, ",block-allocator=hashed_relocation");
671 if (opts & (1 << REISERFS_TEST4))
672 seq_puts(seq, ",block-allocator=test4");
673 show_alloc_options(seq, s);
678 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
680 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
684 static const struct super_operations reiserfs_sops = {
685 .alloc_inode = reiserfs_alloc_inode,
686 .destroy_inode = reiserfs_destroy_inode,
687 .write_inode = reiserfs_write_inode,
688 .dirty_inode = reiserfs_dirty_inode,
689 .evict_inode = reiserfs_evict_inode,
690 .put_super = reiserfs_put_super,
691 .write_super = reiserfs_write_super,
692 .sync_fs = reiserfs_sync_fs,
693 .freeze_fs = reiserfs_freeze,
694 .unfreeze_fs = reiserfs_unfreeze,
695 .statfs = reiserfs_statfs,
696 .remount_fs = reiserfs_remount,
697 .show_options = reiserfs_show_options,
699 .quota_read = reiserfs_quota_read,
700 .quota_write = reiserfs_quota_write,
705 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
707 static int reiserfs_write_dquot(struct dquot *);
708 static int reiserfs_acquire_dquot(struct dquot *);
709 static int reiserfs_release_dquot(struct dquot *);
710 static int reiserfs_mark_dquot_dirty(struct dquot *);
711 static int reiserfs_write_info(struct super_block *, int);
712 static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
714 static const struct dquot_operations reiserfs_quota_operations = {
715 .write_dquot = reiserfs_write_dquot,
716 .acquire_dquot = reiserfs_acquire_dquot,
717 .release_dquot = reiserfs_release_dquot,
718 .mark_dirty = reiserfs_mark_dquot_dirty,
719 .write_info = reiserfs_write_info,
720 .alloc_dquot = dquot_alloc,
721 .destroy_dquot = dquot_destroy,
724 static const struct quotactl_ops reiserfs_qctl_operations = {
725 .quota_on = reiserfs_quota_on,
726 .quota_off = dquot_quota_off,
727 .quota_sync = dquot_quota_sync,
728 .get_info = dquot_get_dqinfo,
729 .set_info = dquot_set_dqinfo,
730 .get_dqblk = dquot_get_dqblk,
731 .set_dqblk = dquot_set_dqblk,
735 static const struct export_operations reiserfs_export_ops = {
736 .encode_fh = reiserfs_encode_fh,
737 .fh_to_dentry = reiserfs_fh_to_dentry,
738 .fh_to_parent = reiserfs_fh_to_parent,
739 .get_parent = reiserfs_get_parent,
742 /* this struct is used in reiserfs_getopt () for containing the value for those
743 mount options that have values rather than being toggles. */
746 int setmask; /* bitmask which is to set on mount_options bitmask when this
747 value is found, 0 is no bits are to be changed. */
748 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
749 value is found, 0 is no bits are to be changed. This is
750 applied BEFORE setmask */
753 /* Set this bit in arg_required to allow empty arguments */
754 #define REISERFS_OPT_ALLOWEMPTY 31
756 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
760 int arg_required; /* 0 if argument is not required, not 0 otherwise */
761 const arg_desc_t *values; /* list of values accepted by an option */
762 int setmask; /* bitmask which is to set on mount_options bitmask when this
763 value is found, 0 is no bits are to be changed. */
764 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
765 value is found, 0 is no bits are to be changed. This is
766 applied BEFORE setmask */
769 /* possible values for -o data= */
770 static const arg_desc_t logging_mode[] = {
771 {"ordered", 1 << REISERFS_DATA_ORDERED,
772 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
773 {"journal", 1 << REISERFS_DATA_LOG,
774 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
775 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
776 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
780 /* possible values for -o barrier= */
781 static const arg_desc_t barrier_mode[] = {
782 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
783 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
787 /* possible values for "-o block-allocator=" and bits which are to be set in
788 s_mount_opt of reiserfs specific part of in-core super block */
789 static const arg_desc_t balloc[] = {
790 {"noborder", 1 << REISERFS_NO_BORDER, 0},
791 {"border", 0, 1 << REISERFS_NO_BORDER},
792 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
793 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
794 {"test4", 1 << REISERFS_TEST4, 0},
795 {"notest4", 0, 1 << REISERFS_TEST4},
799 static const arg_desc_t tails[] = {
800 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
801 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
802 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
806 static const arg_desc_t error_actions[] = {
807 {"panic", 1 << REISERFS_ERROR_PANIC,
808 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
809 {"ro-remount", 1 << REISERFS_ERROR_RO,
810 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
811 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
812 {"continue", 1 << REISERFS_ERROR_CONTINUE,
813 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
818 /* proceed only one option from a list *cur - string containing of mount options
819 opts - array of options which are accepted
820 opt_arg - if option is found and requires an argument and if it is specifed
821 in the input - pointer to the argument is stored here
822 bit_flags - if option requires to set a certain bit - it is set here
823 return -1 if unknown option is found, opt->arg_required otherwise */
824 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
825 char **opt_arg, unsigned long *bit_flags)
834 const opt_desc_t *opt;
835 const arg_desc_t *arg;
839 /* assume argument cannot contain commas */
840 *cur = strchr(p, ',');
846 if (!strncmp(p, "alloc=", 6)) {
847 /* Ugly special case, probably we should redo options parser so that
848 it can understand several arguments for some options, also so that
849 it can fill several bitfields with option values. */
850 if (reiserfs_parse_alloc_options(s, p + 6)) {
857 /* for every option in the list */
858 for (opt = opts; opt->option_name; opt++) {
859 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
862 (1 << REISERFS_UNSUPPORTED_OPT))
863 reiserfs_warning(s, "super-6500",
864 "%s not supported.\n",
867 *bit_flags &= ~opt->clrmask;
869 (1 << REISERFS_UNSUPPORTED_OPT))
870 reiserfs_warning(s, "super-6501",
871 "%s not supported.\n",
874 *bit_flags |= opt->setmask;
879 if (!opt->option_name) {
880 reiserfs_warning(s, "super-6502",
881 "unknown mount option \"%s\"", p);
885 p += strlen(opt->option_name);
888 if (!opt->arg_required) {
889 reiserfs_warning(s, "super-6503",
890 "the option \"%s\" does not "
891 "require an argument\n",
898 if (opt->arg_required) {
899 reiserfs_warning(s, "super-6504",
900 "the option \"%s\" requires an "
901 "argument\n", opt->option_name);
906 reiserfs_warning(s, "super-6505",
907 "head of option \"%s\" is only correct\n",
912 /* move to the argument, or to next option if argument is not required */
915 if (opt->arg_required
916 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
918 /* this catches "option=," if not allowed */
919 reiserfs_warning(s, "super-6506",
920 "empty argument for \"%s\"\n",
926 /* *=NULLopt_arg contains pointer to argument */
928 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
931 /* values possible for this option are listed in opt->values */
932 for (arg = opt->values; arg->value; arg++) {
933 if (!strcmp(p, arg->value)) {
935 *bit_flags &= ~arg->clrmask;
936 *bit_flags |= arg->setmask;
938 return opt->arg_required;
942 reiserfs_warning(s, "super-6506",
943 "bad value \"%s\" for option \"%s\"\n", p,
948 /* returns 0 if something is wrong in option string, 1 - otherwise */
949 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
950 unsigned long *mount_options,
951 /* after the parsing phase, contains the
952 collection of bitflags defining what
953 mount options were selected. */
954 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
956 unsigned int *commit_max_age,
963 opt_desc_t opts[] = {
964 /* Compatibility stuff, so that -o notail for old setups still work */
965 {"tails",.arg_required = 't',.values = tails},
967 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
968 {"conv",.setmask = 1 << REISERFS_CONVERT},
969 {"attrs",.setmask = 1 << REISERFS_ATTRS},
970 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
971 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
972 #ifdef CONFIG_REISERFS_FS_XATTR
973 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
974 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
976 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
977 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
979 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
980 {"acl",.setmask = 1 << REISERFS_POSIXACL},
981 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
983 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
984 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
986 {.option_name = "nolog"},
987 {"replayonly",.setmask = 1 << REPLAYONLY},
988 {"block-allocator",.arg_required = 'a',.values = balloc},
989 {"data",.arg_required = 'd',.values = logging_mode},
990 {"barrier",.arg_required = 'b',.values = barrier_mode},
991 {"resize",.arg_required = 'r',.values = NULL},
992 {"jdev",.arg_required = 'j',.values = NULL},
993 {"nolargeio",.arg_required = 'w',.values = NULL},
994 {"commit",.arg_required = 'c',.values = NULL},
995 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
996 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
997 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
998 {"errors",.arg_required = 'e',.values = error_actions},
999 {"usrjquota",.arg_required =
1000 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1001 {"grpjquota",.arg_required =
1002 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1003 {"jqfmt",.arg_required = 'f',.values = NULL},
1004 {.option_name = NULL}
1008 if (!options || !*options)
1009 /* use default configuration: create tails, journaling on, no
1010 conversion to newest format */
1013 for (pos = options; pos;) {
1014 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1016 /* wrong option is given */
1023 /* "resize=NNN" or "resize=auto" */
1025 if (!strcmp(arg, "auto")) {
1026 /* From JFS code, to auto-get the size. */
1028 s->s_bdev->bd_inode->i_size >> s->
1031 *blocks = simple_strtoul(arg, &p, 0);
1033 /* NNN does not look like a number */
1034 reiserfs_warning(s, "super-6507",
1044 unsigned long val = simple_strtoul(arg, &p, 0);
1045 /* commit=NNN (time in seconds) */
1046 if (*p != '\0' || val >= (unsigned int)-1) {
1047 reiserfs_warning(s, "super-6508",
1048 "bad value %s for -ocommit\n",
1052 *commit_max_age = (unsigned int)val;
1056 reiserfs_warning(s, "super-6509", "nolargeio option "
1057 "is no longer supported");
1062 if (arg && *arg && jdev_name) {
1063 if (*jdev_name) { //Hm, already assigned?
1064 reiserfs_warning(s, "super-6510",
1065 "journal device was "
1066 "already specified to "
1067 "be %s", *jdev_name);
1074 if (c == 'u' || c == 'g') {
1075 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1077 if (sb_any_quota_loaded(s) &&
1078 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1079 reiserfs_warning(s, "super-6511",
1080 "cannot change journaled "
1081 "quota options when quota "
1085 if (*arg) { /* Some filename specified? */
1086 if (REISERFS_SB(s)->s_qf_names[qtype]
1087 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1089 reiserfs_warning(s, "super-6512",
1091 "already specified.",
1095 if (strchr(arg, '/')) {
1096 reiserfs_warning(s, "super-6513",
1097 "quotafile must be "
1098 "on filesystem root.");
1102 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1103 if (!qf_names[qtype]) {
1104 reiserfs_warning(s, "reiserfs-2502",
1105 "not enough memory "
1110 strcpy(qf_names[qtype], arg);
1111 if (qtype == USRQUOTA)
1112 *mount_options |= 1 << REISERFS_USRQUOTA;
1114 *mount_options |= 1 << REISERFS_GRPQUOTA;
1116 if (qf_names[qtype] !=
1117 REISERFS_SB(s)->s_qf_names[qtype])
1118 kfree(qf_names[qtype]);
1119 qf_names[qtype] = NULL;
1120 if (qtype == USRQUOTA)
1121 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1123 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1127 if (!strcmp(arg, "vfsold"))
1128 *qfmt = QFMT_VFS_OLD;
1129 else if (!strcmp(arg, "vfsv0"))
1130 *qfmt = QFMT_VFS_V0;
1132 reiserfs_warning(s, "super-6514",
1133 "unknown quota format "
1137 if (sb_any_quota_loaded(s) &&
1138 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1139 reiserfs_warning(s, "super-6515",
1140 "cannot change journaled "
1141 "quota options when quota "
1147 if (c == 'u' || c == 'g' || c == 'f') {
1148 reiserfs_warning(s, "reiserfs-2503", "journaled "
1149 "quota options not supported.");
1156 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1157 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1158 reiserfs_warning(s, "super-6515",
1159 "journaled quota format not specified.");
1162 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1163 sb_has_quota_loaded(s, USRQUOTA)) ||
1164 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1165 sb_has_quota_loaded(s, GRPQUOTA))) {
1166 reiserfs_warning(s, "super-6516", "quota options must "
1167 "be present when quota is turned on.");
1175 static void switch_data_mode(struct super_block *s, unsigned long mode)
1177 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1178 (1 << REISERFS_DATA_ORDERED) |
1179 (1 << REISERFS_DATA_WRITEBACK));
1180 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1183 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1185 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1186 if (!reiserfs_data_log(s)) {
1187 switch_data_mode(s, REISERFS_DATA_LOG);
1188 reiserfs_info(s, "switching to journaled data mode\n");
1190 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1191 if (!reiserfs_data_ordered(s)) {
1192 switch_data_mode(s, REISERFS_DATA_ORDERED);
1193 reiserfs_info(s, "switching to ordered data mode\n");
1195 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1196 if (!reiserfs_data_writeback(s)) {
1197 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1198 reiserfs_info(s, "switching to writeback data mode\n");
1203 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1205 int flush = (1 << REISERFS_BARRIER_FLUSH);
1206 int none = (1 << REISERFS_BARRIER_NONE);
1207 int all_barrier = flush | none;
1209 if (bits & all_barrier) {
1210 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1212 REISERFS_SB(s)->s_mount_opt |= flush;
1213 printk("reiserfs: enabling write barrier flush mode\n");
1214 } else if (bits & none) {
1215 REISERFS_SB(s)->s_mount_opt |= none;
1216 printk("reiserfs: write barriers turned off\n");
1221 static void handle_attrs(struct super_block *s)
1223 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1225 if (reiserfs_attrs(s)) {
1226 if (old_format_only(s)) {
1227 reiserfs_warning(s, "super-6517", "cannot support "
1228 "attributes on 3.5.x disk format");
1229 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1232 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1233 reiserfs_warning(s, "super-6518", "cannot support "
1234 "attributes until flag is set in "
1236 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1242 static void handle_quota_files(struct super_block *s, char **qf_names,
1247 for (i = 0; i < MAXQUOTAS; i++) {
1248 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1249 kfree(REISERFS_SB(s)->s_qf_names[i]);
1250 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1252 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1256 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1258 struct reiserfs_super_block *rs;
1259 struct reiserfs_transaction_handle th;
1260 unsigned long blocks;
1261 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1262 unsigned long safe_mask = 0;
1263 unsigned int commit_max_age = (unsigned int)-1;
1264 struct reiserfs_journal *journal = SB_JOURNAL(s);
1265 char *new_opts = kstrdup(arg, GFP_KERNEL);
1267 char *qf_names[MAXQUOTAS];
1268 unsigned int qfmt = 0;
1273 reiserfs_write_lock(s);
1276 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1279 rs = SB_DISK_SUPER_BLOCK(s);
1281 if (!reiserfs_parse_options
1282 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1285 for (i = 0; i < MAXQUOTAS; i++)
1286 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1293 handle_quota_files(s, qf_names, &qfmt);
1298 /* Add options that are safe here */
1299 safe_mask |= 1 << REISERFS_SMALLTAIL;
1300 safe_mask |= 1 << REISERFS_LARGETAIL;
1301 safe_mask |= 1 << REISERFS_NO_BORDER;
1302 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1303 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1304 safe_mask |= 1 << REISERFS_TEST4;
1305 safe_mask |= 1 << REISERFS_ATTRS;
1306 safe_mask |= 1 << REISERFS_XATTRS_USER;
1307 safe_mask |= 1 << REISERFS_POSIXACL;
1308 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1309 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1310 safe_mask |= 1 << REISERFS_ERROR_RO;
1311 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1312 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1313 safe_mask |= 1 << REISERFS_USRQUOTA;
1314 safe_mask |= 1 << REISERFS_GRPQUOTA;
1316 /* Update the bitmask, taking care to keep
1317 * the bits we're not allowed to change here */
1318 REISERFS_SB(s)->s_mount_opt =
1320 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1322 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1323 journal->j_max_commit_age = commit_max_age;
1324 journal->j_max_trans_age = commit_max_age;
1325 } else if (commit_max_age == 0) {
1326 /* 0 means restore defaults. */
1327 journal->j_max_commit_age = journal->j_default_max_commit_age;
1328 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1332 err = reiserfs_resize(s, blocks);
1337 if (*mount_flags & MS_RDONLY) {
1338 reiserfs_xattr_init(s, *mount_flags);
1339 /* remount read-only */
1340 if (s->s_flags & MS_RDONLY)
1341 /* it is read-only already */
1344 err = dquot_suspend(s, -1);
1348 /* try to remount file system with read-only permissions */
1349 if (sb_umount_state(rs) == REISERFS_VALID_FS
1350 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1354 err = journal_begin(&th, s, 10);
1358 /* Mounting a rw partition read-only. */
1359 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1360 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1361 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1363 /* remount read-write */
1364 if (!(s->s_flags & MS_RDONLY)) {
1365 reiserfs_xattr_init(s, *mount_flags);
1366 goto out_ok; /* We are read-write already */
1369 if (reiserfs_is_journal_aborted(journal)) {
1370 err = journal->j_errno;
1374 handle_data_mode(s, mount_options);
1375 handle_barrier_mode(s, mount_options);
1376 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1377 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1378 err = journal_begin(&th, s, 10);
1382 /* Mount a partition which is read-only, read-write */
1383 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1384 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1385 s->s_flags &= ~MS_RDONLY;
1386 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1387 if (!old_format_only(s))
1388 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1389 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1390 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1391 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1393 /* this will force a full flush of all journal lists */
1394 SB_JOURNAL(s)->j_must_wait = 1;
1395 err = journal_end(&th, s, 10);
1400 if (!(*mount_flags & MS_RDONLY)) {
1401 dquot_resume(s, -1);
1402 finish_unfinished(s);
1403 reiserfs_xattr_init(s, *mount_flags);
1407 replace_mount_options(s, new_opts);
1408 reiserfs_write_unlock(s);
1413 reiserfs_write_unlock(s);
1417 static int read_super_block(struct super_block *s, int offset)
1419 struct buffer_head *bh;
1420 struct reiserfs_super_block *rs;
1423 bh = sb_bread(s, offset / s->s_blocksize);
1425 reiserfs_warning(s, "sh-2006",
1426 "bread failed (dev %s, block %lu, size %lu)",
1427 reiserfs_bdevname(s), offset / s->s_blocksize,
1432 rs = (struct reiserfs_super_block *)bh->b_data;
1433 if (!is_any_reiserfs_magic_string(rs)) {
1438 // ok, reiserfs signature (old or new) found in at the given offset
1440 fs_blocksize = sb_blocksize(rs);
1442 sb_set_blocksize(s, fs_blocksize);
1444 bh = sb_bread(s, offset / s->s_blocksize);
1446 reiserfs_warning(s, "sh-2007",
1447 "bread failed (dev %s, block %lu, size %lu)",
1448 reiserfs_bdevname(s), offset / s->s_blocksize,
1453 rs = (struct reiserfs_super_block *)bh->b_data;
1454 if (sb_blocksize(rs) != s->s_blocksize) {
1455 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1456 "filesystem on (dev %s, block %Lu, size %lu)",
1457 reiserfs_bdevname(s),
1458 (unsigned long long)bh->b_blocknr,
1464 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1466 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1467 "--rebuild-tree run detected. Please run\n"
1468 "reiserfsck --rebuild-tree and wait for a "
1469 "completion. If that fails\n"
1470 "get newer reiserfsprogs package");
1474 SB_BUFFER_WITH_SB(s) = bh;
1475 SB_DISK_SUPER_BLOCK(s) = rs;
1477 if (is_reiserfs_jr(rs)) {
1478 /* magic is of non-standard journal filesystem, look at s_version to
1479 find which format is in use */
1480 if (sb_version(rs) == REISERFS_VERSION_2)
1481 reiserfs_info(s, "found reiserfs format \"3.6\""
1482 " with non-standard journal\n");
1483 else if (sb_version(rs) == REISERFS_VERSION_1)
1484 reiserfs_info(s, "found reiserfs format \"3.5\""
1485 " with non-standard journal\n");
1487 reiserfs_warning(s, "sh-2012", "found unknown "
1488 "format \"%u\" of reiserfs with "
1489 "non-standard magic", sb_version(rs));
1493 /* s_version of standard format may contain incorrect information,
1494 so we just look at the magic string */
1496 "found reiserfs format \"%s\" with standard journal\n",
1497 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1499 s->s_op = &reiserfs_sops;
1500 s->s_export_op = &reiserfs_export_ops;
1502 s->s_qcop = &reiserfs_qctl_operations;
1503 s->dq_op = &reiserfs_quota_operations;
1506 /* new format is limited by the 32 bit wide i_blocks field, want to
1507 ** be one full block below that.
1509 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1513 /* after journal replay, reread all bitmap and super blocks */
1514 static int reread_meta_blocks(struct super_block *s)
1516 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1517 reiserfs_write_unlock(s);
1518 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1519 reiserfs_write_lock(s);
1520 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1521 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1528 /////////////////////////////////////////////////////
1529 // hash detection stuff
1531 // if root directory is empty - we set default - Yura's - hash and
1533 // FIXME: we look for only one name in a directory. If tea and yura
1534 // bith have the same value - we ask user to send report to the
1536 static __u32 find_hash_out(struct super_block *s)
1539 struct inode *inode;
1541 INITIALIZE_PATH(path);
1542 struct reiserfs_dir_entry de;
1543 __u32 hash = DEFAULT_HASH;
1545 inode = s->s_root->d_inode;
1547 do { // Some serious "goto"-hater was there ;)
1548 u32 teahash, r5hash, yurahash;
1550 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1551 retval = search_by_entry_key(s, &key, &path, &de);
1552 if (retval == IO_ERROR) {
1556 if (retval == NAME_NOT_FOUND)
1558 set_de_name_and_namelen(&de);
1559 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1560 /* allow override in this case */
1561 if (reiserfs_rupasov_hash(s)) {
1564 reiserfs_info(s, "FS seems to be empty, autodetect "
1565 "is using the default hash\n");
1568 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1569 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1570 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1571 if (((teahash == r5hash)
1573 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1574 == r5hash)) || ((teahash == yurahash)
1576 GET_HASH_VALUE(deh_offset
1581 || ((r5hash == yurahash)
1583 GET_HASH_VALUE(deh_offset
1584 (&(de.de_deh[de.de_entry_num])))))) {
1585 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1586 "automatically detect hash function. "
1587 "Please mount with -o "
1588 "hash={tea,rupasov,r5}");
1592 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1595 else if (GET_HASH_VALUE
1596 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1598 else if (GET_HASH_VALUE
1599 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1602 reiserfs_warning(s, "reiserfs-2506",
1603 "Unrecognised hash function");
1612 // finds out which hash names are sorted with
1613 static int what_hash(struct super_block *s)
1617 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1619 /* reiserfs_hash_detect() == true if any of the hash mount options
1620 ** were used. We must check them to make sure the user isn't
1621 ** using a bad hash value
1623 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1624 code = find_hash_out(s);
1626 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1627 /* detection has found the hash, and we must check against the
1630 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1631 reiserfs_warning(s, "reiserfs-2507",
1632 "Error, %s hash detected, "
1633 "unable to force rupasov hash",
1634 reiserfs_hashname(code));
1636 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1637 reiserfs_warning(s, "reiserfs-2508",
1638 "Error, %s hash detected, "
1639 "unable to force tea hash",
1640 reiserfs_hashname(code));
1642 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1643 reiserfs_warning(s, "reiserfs-2509",
1644 "Error, %s hash detected, "
1645 "unable to force r5 hash",
1646 reiserfs_hashname(code));
1650 /* find_hash_out was not called or could not determine the hash */
1651 if (reiserfs_rupasov_hash(s)) {
1653 } else if (reiserfs_tea_hash(s)) {
1655 } else if (reiserfs_r5_hash(s)) {
1660 /* if we are mounted RW, and we have a new valid hash code, update
1663 if (code != UNSET_HASH &&
1664 !(s->s_flags & MS_RDONLY) &&
1665 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1666 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1671 // return pointer to appropriate function
1672 static hashf_t hash_function(struct super_block *s)
1674 switch (what_hash(s)) {
1676 reiserfs_info(s, "Using tea hash to sort names\n");
1679 reiserfs_info(s, "Using rupasov hash to sort names\n");
1682 reiserfs_info(s, "Using r5 hash to sort names\n");
1688 // this is used to set up correct value for old partitions
1689 static int function2code(hashf_t func)
1691 if (func == keyed_hash)
1693 if (func == yura_hash)
1695 if (func == r5_hash)
1698 BUG(); // should never happen
1703 #define SWARN(silent, s, id, ...) \
1705 reiserfs_warning(s, id, __VA_ARGS__)
1707 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1709 struct inode *root_inode;
1710 struct reiserfs_transaction_handle th;
1712 unsigned long blocks;
1713 unsigned int commit_max_age = 0;
1715 struct reiserfs_iget_args args;
1716 struct reiserfs_super_block *rs;
1718 struct reiserfs_sb_info *sbi;
1719 int errval = -EINVAL;
1720 char *qf_names[MAXQUOTAS] = {};
1721 unsigned int qfmt = 0;
1723 save_mount_options(s, data);
1725 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1729 /* Set default values for options: non-aggressive tails, RO on errors */
1730 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1731 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1732 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1733 /* no preallocation minimum, be smart in
1734 reiserfs_file_write instead */
1735 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1736 /* Preallocate by 16 blocks (17-1) at once */
1737 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1738 /* setup default block allocator options */
1739 reiserfs_init_alloc_options(s);
1741 mutex_init(&REISERFS_SB(s)->lock);
1742 REISERFS_SB(s)->lock_depth = -1;
1745 * This function is called with the bkl, which also was the old
1746 * locking used here.
1747 * do_journal_begin() will soon check if we hold the lock (ie: was the
1748 * bkl). This is likely because do_journal_begin() has several another
1749 * callers because at this time, it doesn't seem to be necessary to
1750 * protect against anything.
1751 * Anyway, let's be conservative and lock for now.
1753 reiserfs_write_lock(s);
1756 if (reiserfs_parse_options
1757 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1758 &commit_max_age, qf_names, &qfmt) == 0) {
1761 if (jdev_name && jdev_name[0]) {
1762 REISERFS_SB(s)->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1763 if (!REISERFS_SB(s)->s_jdev) {
1764 SWARN(silent, s, "", "Cannot allocate memory for "
1765 "journal device name");
1770 handle_quota_files(s, qf_names, &qfmt);
1774 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1778 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1779 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1781 /* try new format (64-th 1k block), which can contain reiserfs super block */
1782 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1783 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1784 reiserfs_bdevname(s));
1788 rs = SB_DISK_SUPER_BLOCK(s);
1789 /* Let's do basic sanity check to verify that underlying device is not
1790 smaller than the filesystem. If the check fails then abort and scream,
1791 because bad stuff will happen otherwise. */
1792 if (s->s_bdev && s->s_bdev->bd_inode
1793 && i_size_read(s->s_bdev->bd_inode) <
1794 sb_block_count(rs) * sb_blocksize(rs)) {
1795 SWARN(silent, s, "", "Filesystem cannot be "
1796 "mounted because it is bigger than the device");
1797 SWARN(silent, s, "", "You may need to run fsck "
1798 "or increase size of your LVM partition");
1799 SWARN(silent, s, "", "Or may be you forgot to "
1800 "reboot after fdisk when it told you to");
1804 sbi->s_mount_state = SB_REISERFS_STATE(s);
1805 sbi->s_mount_state = REISERFS_VALID_FS;
1807 if ((errval = reiserfs_init_bitmap_cache(s))) {
1808 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1812 #ifdef CONFIG_REISERFS_CHECK
1813 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1814 SWARN(silent, s, "", "- it is slow mode for debugging.");
1817 /* make data=ordered the default */
1818 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1819 !reiserfs_data_writeback(s)) {
1820 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1823 if (reiserfs_data_log(s)) {
1824 reiserfs_info(s, "using journaled data mode\n");
1825 } else if (reiserfs_data_ordered(s)) {
1826 reiserfs_info(s, "using ordered data mode\n");
1828 reiserfs_info(s, "using writeback data mode\n");
1830 if (reiserfs_barrier_flush(s)) {
1831 printk("reiserfs: using flush barriers\n");
1833 // set_device_ro(s->s_dev, 1) ;
1834 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1835 SWARN(silent, s, "sh-2022",
1836 "unable to initialize journal space");
1839 jinit_done = 1; /* once this is set, journal_release must be called
1840 ** if we error out of the mount
1843 if (reread_meta_blocks(s)) {
1844 SWARN(silent, s, "jmacd-9",
1845 "unable to reread meta blocks after journal init");
1852 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1853 SWARN(silent, s, "clm-7000",
1854 "Detected readonly device, marking FS readonly");
1855 s->s_flags |= MS_RDONLY;
1857 args.objectid = REISERFS_ROOT_OBJECTID;
1858 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1860 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1861 reiserfs_init_locked_inode, (void *)(&args));
1863 SWARN(silent, s, "jmacd-10", "get root inode failed");
1867 if (root_inode->i_state & I_NEW) {
1868 reiserfs_read_locked_inode(root_inode, &args);
1869 unlock_new_inode(root_inode);
1872 s->s_root = d_alloc_root(root_inode);
1877 // define and initialize hash function
1878 sbi->s_hash_function = hash_function(s);
1879 if (sbi->s_hash_function == NULL) {
1885 if (is_reiserfs_3_5(rs)
1886 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1887 set_bit(REISERFS_3_5, &(sbi->s_properties));
1888 else if (old_format)
1889 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1891 set_bit(REISERFS_3_6, &(sbi->s_properties));
1893 if (!(s->s_flags & MS_RDONLY)) {
1895 errval = journal_begin(&th, s, 1);
1901 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1903 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1904 set_sb_fs_state(rs, 0);
1906 /* Clear out s_bmap_nr if it would wrap. We can handle this
1907 * case, but older revisions can't. This will cause the
1908 * file system to fail mount on those older implementations,
1909 * avoiding corruption. -jeffm */
1910 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1911 sb_bmap_nr(rs) != 0) {
1912 reiserfs_warning(s, "super-2030", "This file system "
1913 "claims to use %u bitmap blocks in "
1914 "its super block, but requires %u. "
1915 "Clearing to zero.", sb_bmap_nr(rs),
1916 reiserfs_bmap_count(s));
1918 set_sb_bmap_nr(rs, 0);
1921 if (old_format_only(s)) {
1922 /* filesystem of format 3.5 either with standard or non-standard
1924 if (convert_reiserfs(s)) {
1925 /* and -o conv is given */
1928 "converting 3.5 filesystem to the 3.6 format");
1930 if (is_reiserfs_3_5(rs))
1931 /* put magic string of 3.6 format. 2.2 will not be able to
1932 mount this filesystem anymore */
1933 memcpy(rs->s_v1.s_magic,
1934 reiserfs_3_6_magic_string,
1936 (reiserfs_3_6_magic_string));
1938 set_sb_version(rs, REISERFS_VERSION_2);
1939 reiserfs_convert_objectid_map_v1(s);
1940 set_bit(REISERFS_3_6, &(sbi->s_properties));
1941 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1942 } else if (!silent) {
1943 reiserfs_info(s, "using 3.5.x disk format\n");
1946 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1949 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1950 errval = journal_end(&th, s, 1);
1957 if ((errval = reiserfs_lookup_privroot(s)) ||
1958 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1964 /* look for files which were to be removed in previous session */
1965 finish_unfinished(s);
1967 if (old_format_only(s) && !silent) {
1968 reiserfs_info(s, "using 3.5.x disk format\n");
1971 if ((errval = reiserfs_lookup_privroot(s)) ||
1972 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1978 // mark hash in super block: it could be unset. overwrite should be ok
1979 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1983 reiserfs_proc_info_init(s);
1985 init_waitqueue_head(&(sbi->s_wait));
1986 spin_lock_init(&sbi->bitmap_lock);
1988 reiserfs_write_unlock(s);
1993 if (jinit_done) { /* kill the commit thread, free journal ram */
1994 journal_release_error(NULL, s);
1997 reiserfs_write_unlock(s);
1999 reiserfs_free_bitmap_cache(s);
2000 if (SB_BUFFER_WITH_SB(s))
2001 brelse(SB_BUFFER_WITH_SB(s));
2005 for (j = 0; j < MAXQUOTAS; j++)
2011 s->s_fs_info = NULL;
2015 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2017 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2019 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2020 buf->f_bfree = sb_free_blocks(rs);
2021 buf->f_bavail = buf->f_bfree;
2022 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2023 buf->f_bsize = dentry->d_sb->s_blocksize;
2024 /* changed to accommodate gcc folks. */
2025 buf->f_type = REISERFS_SUPER_MAGIC;
2026 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2027 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2028 sizeof(rs->s_uuid)/2);
2034 static int reiserfs_write_dquot(struct dquot *dquot)
2036 struct reiserfs_transaction_handle th;
2039 reiserfs_write_lock(dquot->dq_sb);
2041 journal_begin(&th, dquot->dq_sb,
2042 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2045 ret = dquot_commit(dquot);
2047 journal_end(&th, dquot->dq_sb,
2048 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2052 reiserfs_write_unlock(dquot->dq_sb);
2056 static int reiserfs_acquire_dquot(struct dquot *dquot)
2058 struct reiserfs_transaction_handle th;
2061 reiserfs_write_lock(dquot->dq_sb);
2063 journal_begin(&th, dquot->dq_sb,
2064 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2067 ret = dquot_acquire(dquot);
2069 journal_end(&th, dquot->dq_sb,
2070 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2074 reiserfs_write_unlock(dquot->dq_sb);
2078 static int reiserfs_release_dquot(struct dquot *dquot)
2080 struct reiserfs_transaction_handle th;
2083 reiserfs_write_lock(dquot->dq_sb);
2085 journal_begin(&th, dquot->dq_sb,
2086 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2088 /* Release dquot anyway to avoid endless cycle in dqput() */
2089 dquot_release(dquot);
2092 ret = dquot_release(dquot);
2094 journal_end(&th, dquot->dq_sb,
2095 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2099 reiserfs_write_unlock(dquot->dq_sb);
2103 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2105 /* Are we journaling quotas? */
2106 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2107 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2108 dquot_mark_dquot_dirty(dquot);
2109 return reiserfs_write_dquot(dquot);
2111 return dquot_mark_dquot_dirty(dquot);
2114 static int reiserfs_write_info(struct super_block *sb, int type)
2116 struct reiserfs_transaction_handle th;
2119 /* Data block + inode block */
2120 reiserfs_write_lock(sb);
2121 ret = journal_begin(&th, sb, 2);
2124 ret = dquot_commit_info(sb, type);
2125 err = journal_end(&th, sb, 2);
2129 reiserfs_write_unlock(sb);
2134 * Turn on quotas during mount time - we need to find the quota file and such...
2136 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2138 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2139 REISERFS_SB(sb)->s_jquota_fmt, type);
2143 * Standard function to be called on quota_on
2145 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2149 struct inode *inode;
2150 struct reiserfs_transaction_handle th;
2151 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2153 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt)))
2156 /* Quotafile not on the same filesystem? */
2157 if (path->dentry->d_sb != sb) {
2161 inode = path->dentry->d_inode;
2162 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2163 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2164 err = reiserfs_unpack(inode, NULL);
2166 reiserfs_warning(sb, "super-6520",
2167 "Unpacking tail of quota file failed"
2168 " (%d). Cannot turn on quotas.", err);
2172 mark_inode_dirty(inode);
2174 /* Journaling quota? */
2175 if (REISERFS_SB(sb)->s_qf_names[type]) {
2176 /* Quotafile not of fs root? */
2177 if (path->dentry->d_parent != sb->s_root)
2178 reiserfs_warning(sb, "super-6521",
2179 "Quota file not on filesystem root. "
2180 "Journalled quota will not work.");
2184 * When we journal data on quota file, we have to flush journal to see
2185 * all updates to the file when we bypass pagecache...
2187 if (reiserfs_file_data_log(inode)) {
2188 /* Just start temporary transaction and finish it */
2189 err = journal_begin(&th, sb, 1);
2192 err = journal_end_sync(&th, sb, 1);
2196 err = dquot_quota_on(sb, type, format_id, path);
2201 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2202 * acquiring the locks... As quota files are never truncated and quota code
2203 * itself serializes the operations (and no one else should touch the files)
2204 * we don't have to be afraid of races */
2205 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2206 size_t len, loff_t off)
2208 struct inode *inode = sb_dqopt(sb)->files[type];
2209 unsigned long blk = off >> sb->s_blocksize_bits;
2210 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2212 struct buffer_head tmp_bh, *bh;
2213 loff_t i_size = i_size_read(inode);
2217 if (off + len > i_size)
2220 while (toread > 0) {
2222 sb->s_blocksize - offset <
2223 toread ? sb->s_blocksize - offset : toread;
2225 /* Quota files are without tails so we can safely use this function */
2226 reiserfs_write_lock(sb);
2227 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2228 reiserfs_write_unlock(sb);
2231 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2232 memset(data, 0, tocopy);
2234 bh = sb_bread(sb, tmp_bh.b_blocknr);
2237 memcpy(data, bh->b_data + offset, tocopy);
2248 /* Write to quotafile (we know the transaction is already started and has
2249 * enough credits) */
2250 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2251 const char *data, size_t len, loff_t off)
2253 struct inode *inode = sb_dqopt(sb)->files[type];
2254 unsigned long blk = off >> sb->s_blocksize_bits;
2255 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2256 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2257 size_t towrite = len;
2258 struct buffer_head tmp_bh, *bh;
2260 if (!current->journal_info) {
2261 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2262 " cancelled because transaction is not started.\n",
2263 (unsigned long long)off, (unsigned long long)len);
2266 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2267 while (towrite > 0) {
2268 tocopy = sb->s_blocksize - offset < towrite ?
2269 sb->s_blocksize - offset : towrite;
2271 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2274 if (offset || tocopy != sb->s_blocksize)
2275 bh = sb_bread(sb, tmp_bh.b_blocknr);
2277 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2283 memcpy(bh->b_data + offset, data, tocopy);
2284 flush_dcache_page(bh->b_page);
2285 set_buffer_uptodate(bh);
2287 reiserfs_prepare_for_journal(sb, bh, 1);
2288 journal_mark_dirty(current->journal_info, sb, bh);
2290 reiserfs_add_ordered_list(inode, bh);
2298 if (len == towrite) {
2299 mutex_unlock(&inode->i_mutex);
2302 if (inode->i_size < off + len - towrite)
2303 i_size_write(inode, off + len - towrite);
2305 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2306 mark_inode_dirty(inode);
2307 mutex_unlock(&inode->i_mutex);
2308 return len - towrite;
2313 static struct dentry *get_super_block(struct file_system_type *fs_type,
2314 int flags, const char *dev_name,
2317 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2320 static int __init init_reiserfs_fs(void)
2324 if ((ret = init_inodecache())) {
2328 reiserfs_proc_info_global_init();
2330 ret = register_filesystem(&reiserfs_fs_type);
2336 reiserfs_proc_info_global_done();
2337 destroy_inodecache();
2342 static void __exit exit_reiserfs_fs(void)
2344 reiserfs_proc_info_global_done();
2345 unregister_filesystem(&reiserfs_fs_type);
2346 destroy_inodecache();
2349 struct file_system_type reiserfs_fs_type = {
2350 .owner = THIS_MODULE,
2352 .mount = get_super_block,
2353 .kill_sb = reiserfs_kill_sb,
2354 .fs_flags = FS_REQUIRES_DEV,
2357 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2358 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2359 MODULE_LICENSE("GPL");
2361 module_init(init_reiserfs_fs);
2362 module_exit(exit_reiserfs_fs);