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/vmalloc.h>
16 #include <linux/time.h>
17 #include <asm/uaccess.h>
18 #include <linux/reiserfs_fs.h>
19 #include <linux/reiserfs_acl.h>
20 #include <linux/reiserfs_xattr.h>
21 #include <linux/init.h>
22 #include <linux/blkdev.h>
23 #include <linux/buffer_head.h>
24 #include <linux/exportfs.h>
25 #include <linux/quotaops.h>
26 #include <linux/vfs.h>
27 #include <linux/mount.h>
28 #include <linux/namei.h>
29 #include <linux/crc32.h>
30 #include <linux/smp_lock.h>
32 struct file_system_type reiserfs_fs_type;
34 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
38 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
40 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen(reiserfs_3_5_magic_string));
44 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
46 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
47 strlen(reiserfs_3_6_magic_string));
50 int is_reiserfs_jr(struct reiserfs_super_block *rs)
52 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
53 strlen(reiserfs_jr_magic_string));
56 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
58 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
62 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
63 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
65 static int reiserfs_sync_fs(struct super_block *s, int wait)
67 struct reiserfs_transaction_handle th;
69 reiserfs_write_lock(s);
70 if (!journal_begin(&th, s, 1))
71 if (!journal_end_sync(&th, s, 1))
72 reiserfs_flush_old_commits(s);
73 s->s_dirt = 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s);
79 static void reiserfs_write_super(struct super_block *s)
81 reiserfs_sync_fs(s, 1);
84 static int reiserfs_freeze(struct super_block *s)
86 struct reiserfs_transaction_handle th;
87 reiserfs_write_lock(s);
88 if (!(s->s_flags & MS_RDONLY)) {
89 int err = journal_begin(&th, s, 1);
91 reiserfs_block_writes(&th);
93 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
95 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
96 reiserfs_block_writes(&th);
97 journal_end_sync(&th, s, 1);
101 reiserfs_write_unlock(s);
105 static int reiserfs_unfreeze(struct super_block *s)
107 reiserfs_allow_writes(s);
111 extern const struct in_core_key MAX_IN_CORE_KEY;
113 /* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
120 static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
123 struct reiserfs_transaction_handle th;
126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
131 reiserfs_delete_solid_item(&th, NULL, key);
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
140 static int reiserfs_quota_on_mount(struct super_block *, int);
143 /* look for uncompleted unlinks and truncates and complete them */
144 static int finish_unfinished(struct super_block *s)
146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
148 struct reiserfs_key save_link_key, last_inode_key;
150 struct item_head *ih;
151 struct buffer_head *bh;
162 /* compose key to look for "save" links */
163 max_cpu_key.version = KEY_FORMAT_3_5;
164 max_cpu_key.on_disk_key.k_dir_id = ~0U;
165 max_cpu_key.on_disk_key.k_objectid = ~0U;
166 set_cpu_key_k_offset(&max_cpu_key, ~0U);
167 max_cpu_key.key_length = 3;
169 memset(&last_inode_key, 0, sizeof(last_inode_key));
172 /* Needed for iput() to work correctly and not trash data */
173 if (s->s_flags & MS_ACTIVE) {
177 s->s_flags |= MS_ACTIVE;
179 /* Turn on quotas so that they are updated correctly */
180 for (i = 0; i < MAXQUOTAS; i++) {
181 if (REISERFS_SB(s)->s_qf_names[i]) {
182 int ret = reiserfs_quota_on_mount(s, i);
184 reiserfs_warning(s, "reiserfs-2500",
185 "cannot turn on journaled "
186 "quota: error %d", ret);
192 REISERFS_SB(s)->s_is_unlinked_ok = 1;
194 retval = search_item(s, &max_cpu_key, &path);
195 if (retval != ITEM_NOT_FOUND) {
196 reiserfs_error(s, "vs-2140",
197 "search_by_key returned %d", retval);
201 bh = get_last_bh(&path);
202 item_pos = get_item_pos(&path);
203 if (item_pos != B_NR_ITEMS(bh)) {
204 reiserfs_warning(s, "vs-2060",
205 "wrong position found");
209 ih = B_N_PITEM_HEAD(bh, item_pos);
211 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
212 /* there are no "save" links anymore */
215 save_link_key = ih->ih_key;
216 if (is_indirect_le_ih(ih))
221 /* reiserfs_iget needs k_dirid and k_objectid only */
222 item = B_I_PITEM(bh, ih);
223 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
224 obj_key.on_disk_key.k_objectid =
225 le32_to_cpu(ih->ih_key.k_objectid);
226 obj_key.on_disk_key.k_offset = 0;
227 obj_key.on_disk_key.k_type = 0;
231 inode = reiserfs_iget(s, &obj_key);
233 /* the unlink almost completed, it just did not manage to remove
234 "save" link and release objectid */
235 reiserfs_warning(s, "vs-2180", "iget failed for %K",
237 retval = remove_save_link_only(s, &save_link_key, 1);
241 if (!truncate && inode->i_nlink) {
242 /* file is not unlinked */
243 reiserfs_warning(s, "vs-2185",
244 "file %K is not unlinked",
246 retval = remove_save_link_only(s, &save_link_key, 0);
251 if (truncate && S_ISDIR(inode->i_mode)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
256 reiserfs_warning(s, "green-2101",
257 "impossible truncate on a "
258 "directory %k. Please report",
260 retval = remove_save_link_only(s, &save_link_key, 0);
267 REISERFS_I(inode)->i_flags |=
268 i_link_saved_truncate_mask;
269 /* not completed truncate found. New size was committed together
271 reiserfs_info(s, "Truncating %k to %Ld ..",
272 INODE_PKEY(inode), inode->i_size);
273 reiserfs_truncate_file(inode,
275 /*don't update modification time */
277 retval = remove_save_link(inode, truncate);
279 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
280 /* not completed unlink (rmdir) found */
281 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
282 if (memcmp(&last_inode_key, INODE_PKEY(inode),
283 sizeof(last_inode_key))){
284 last_inode_key = *INODE_PKEY(inode);
285 /* removal gets completed in iput */
288 reiserfs_warning(s, "super-2189", "Dead loop "
289 "in finish_unfinished "
290 "detected, just remove "
292 retval = remove_save_link_only(s,
301 REISERFS_SB(s)->s_is_unlinked_ok = 0;
304 /* Turn quotas off */
305 for (i = 0; i < MAXQUOTAS; i++) {
306 if (sb_dqopt(s)->files[i])
307 vfs_quota_off(s, i, 0);
310 /* Restore the flag back */
311 s->s_flags &= ~MS_ACTIVE;
315 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
316 "Completed\n", done);
320 /* to protect file being unlinked from getting lost we "safe" link files
321 being unlinked. This link will be deleted in the same transaction with last
322 item of file. mounting the filesystem we scan all these links and remove
323 files which almost got lost */
324 void add_save_link(struct reiserfs_transaction_handle *th,
325 struct inode *inode, int truncate)
327 INITIALIZE_PATH(path);
333 BUG_ON(!th->t_trans_id);
335 /* file can only get one "save link" of each kind */
337 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
338 "saved link already exists for truncated inode %lx",
341 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
342 "saved link already exists for unlinked inode %lx",
345 /* setup key of "save" link */
346 key.version = KEY_FORMAT_3_5;
347 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
348 key.on_disk_key.k_objectid = inode->i_ino;
350 /* unlink, rmdir, rename */
351 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
352 set_cpu_key_k_type(&key, TYPE_DIRECT);
354 /* item head of "safe" link */
355 make_le_item_head(&ih, &key, key.version,
356 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
357 4 /*length */ , 0xffff /*free space */ );
360 if (S_ISDIR(inode->i_mode))
361 reiserfs_warning(inode->i_sb, "green-2102",
362 "Adding a truncate savelink for "
363 "a directory %k! Please report",
365 set_cpu_key_k_offset(&key, 1);
366 set_cpu_key_k_type(&key, TYPE_INDIRECT);
368 /* item head of "safe" link */
369 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
370 4 /*length */ , 0 /*free space */ );
374 /* look for its place in the tree */
375 retval = search_item(inode->i_sb, &key, &path);
376 if (retval != ITEM_NOT_FOUND) {
377 if (retval != -ENOSPC)
378 reiserfs_error(inode->i_sb, "vs-2100",
379 "search_by_key (%K) returned %d", &key,
385 /* body of "save" link */
386 link = INODE_PKEY(inode)->k_dir_id;
388 /* put "save" link inot tree, don't charge quota to anyone */
390 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
392 if (retval != -ENOSPC)
393 reiserfs_error(inode->i_sb, "vs-2120",
394 "insert_item returned %d", retval);
397 REISERFS_I(inode)->i_flags |=
398 i_link_saved_truncate_mask;
400 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
404 /* this opens transaction unlike add_save_link */
405 int remove_save_link(struct inode *inode, int truncate)
407 struct reiserfs_transaction_handle th;
408 struct reiserfs_key key;
411 /* we are going to do one balancing only */
412 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
416 /* setup key of "save" link */
417 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
418 key.k_objectid = INODE_PKEY(inode)->k_objectid;
420 /* unlink, rmdir, rename */
421 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
422 1 + inode->i_sb->s_blocksize);
423 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
426 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
427 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
431 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
433 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
434 /* don't take quota bytes from anywhere */
435 reiserfs_delete_solid_item(&th, NULL, &key);
437 reiserfs_release_objectid(&th, inode->i_ino);
438 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
440 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
442 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
445 static void reiserfs_kill_sb(struct super_block *s)
447 if (REISERFS_SB(s)) {
448 if (REISERFS_SB(s)->xattr_root) {
449 d_invalidate(REISERFS_SB(s)->xattr_root);
450 dput(REISERFS_SB(s)->xattr_root);
451 REISERFS_SB(s)->xattr_root = NULL;
453 if (REISERFS_SB(s)->priv_root) {
454 d_invalidate(REISERFS_SB(s)->priv_root);
455 dput(REISERFS_SB(s)->priv_root);
456 REISERFS_SB(s)->priv_root = NULL;
463 static void reiserfs_put_super(struct super_block *s)
465 struct reiserfs_transaction_handle th;
471 reiserfs_write_super(s);
473 /* change file system state to current state if it was mounted with read-write permissions */
474 if (!(s->s_flags & MS_RDONLY)) {
475 if (!journal_begin(&th, s, 10)) {
476 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
478 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
479 REISERFS_SB(s)->s_mount_state);
480 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
484 /* note, journal_release checks for readonly mount, and can decide not
485 ** to do a journal_end
487 journal_release(&th, s);
489 reiserfs_free_bitmap_cache(s);
491 brelse(SB_BUFFER_WITH_SB(s));
495 if (REISERFS_SB(s)->reserved_blocks != 0) {
496 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
497 REISERFS_SB(s)->reserved_blocks);
500 reiserfs_proc_info_done(s);
508 static struct kmem_cache *reiserfs_inode_cachep;
510 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
512 struct reiserfs_inode_info *ei;
513 ei = (struct reiserfs_inode_info *)
514 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
517 return &ei->vfs_inode;
520 static void reiserfs_destroy_inode(struct inode *inode)
522 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
525 static void init_once(void *foo)
527 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
529 INIT_LIST_HEAD(&ei->i_prealloc_list);
530 inode_init_once(&ei->vfs_inode);
533 static int init_inodecache(void)
535 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
537 reiserfs_inode_info),
538 0, (SLAB_RECLAIM_ACCOUNT|
541 if (reiserfs_inode_cachep == NULL)
546 static void destroy_inodecache(void)
548 kmem_cache_destroy(reiserfs_inode_cachep);
551 /* we don't mark inodes dirty, we just log them */
552 static void reiserfs_dirty_inode(struct inode *inode)
554 struct reiserfs_transaction_handle th;
557 if (inode->i_sb->s_flags & MS_RDONLY) {
558 reiserfs_warning(inode->i_sb, "clm-6006",
559 "writing inode %lu on readonly FS",
563 reiserfs_write_lock(inode->i_sb);
565 /* this is really only used for atime updates, so they don't have
566 ** to be included in O_SYNC or fsync
568 err = journal_begin(&th, inode->i_sb, 1);
570 reiserfs_write_unlock(inode->i_sb);
573 reiserfs_update_sd(&th, inode);
574 journal_end(&th, inode->i_sb, 1);
575 reiserfs_write_unlock(inode->i_sb);
579 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
581 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
585 static const struct super_operations reiserfs_sops = {
586 .alloc_inode = reiserfs_alloc_inode,
587 .destroy_inode = reiserfs_destroy_inode,
588 .write_inode = reiserfs_write_inode,
589 .dirty_inode = reiserfs_dirty_inode,
590 .delete_inode = reiserfs_delete_inode,
591 .put_super = reiserfs_put_super,
592 .write_super = reiserfs_write_super,
593 .sync_fs = reiserfs_sync_fs,
594 .freeze_fs = reiserfs_freeze,
595 .unfreeze_fs = reiserfs_unfreeze,
596 .statfs = reiserfs_statfs,
597 .remount_fs = reiserfs_remount,
598 .show_options = generic_show_options,
600 .quota_read = reiserfs_quota_read,
601 .quota_write = reiserfs_quota_write,
606 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
608 static int reiserfs_write_dquot(struct dquot *);
609 static int reiserfs_acquire_dquot(struct dquot *);
610 static int reiserfs_release_dquot(struct dquot *);
611 static int reiserfs_mark_dquot_dirty(struct dquot *);
612 static int reiserfs_write_info(struct super_block *, int);
613 static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
615 static struct dquot_operations reiserfs_quota_operations = {
616 .initialize = dquot_initialize,
618 .alloc_space = dquot_alloc_space,
619 .alloc_inode = dquot_alloc_inode,
620 .free_space = dquot_free_space,
621 .free_inode = dquot_free_inode,
622 .transfer = dquot_transfer,
623 .write_dquot = reiserfs_write_dquot,
624 .acquire_dquot = reiserfs_acquire_dquot,
625 .release_dquot = reiserfs_release_dquot,
626 .mark_dirty = reiserfs_mark_dquot_dirty,
627 .write_info = reiserfs_write_info,
628 .alloc_dquot = dquot_alloc,
629 .destroy_dquot = dquot_destroy,
632 static struct quotactl_ops reiserfs_qctl_operations = {
633 .quota_on = reiserfs_quota_on,
634 .quota_off = vfs_quota_off,
635 .quota_sync = vfs_quota_sync,
636 .get_info = vfs_get_dqinfo,
637 .set_info = vfs_set_dqinfo,
638 .get_dqblk = vfs_get_dqblk,
639 .set_dqblk = vfs_set_dqblk,
643 static const struct export_operations reiserfs_export_ops = {
644 .encode_fh = reiserfs_encode_fh,
645 .fh_to_dentry = reiserfs_fh_to_dentry,
646 .fh_to_parent = reiserfs_fh_to_parent,
647 .get_parent = reiserfs_get_parent,
650 /* this struct is used in reiserfs_getopt () for containing the value for those
651 mount options that have values rather than being toggles. */
654 int setmask; /* bitmask which is to set on mount_options bitmask when this
655 value is found, 0 is no bits are to be changed. */
656 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
657 value is found, 0 is no bits are to be changed. This is
658 applied BEFORE setmask */
661 /* Set this bit in arg_required to allow empty arguments */
662 #define REISERFS_OPT_ALLOWEMPTY 31
664 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
668 int arg_required; /* 0 if argument is not required, not 0 otherwise */
669 const arg_desc_t *values; /* list of values accepted by an option */
670 int setmask; /* bitmask which is to set on mount_options bitmask when this
671 value is found, 0 is no bits are to be changed. */
672 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
673 value is found, 0 is no bits are to be changed. This is
674 applied BEFORE setmask */
677 /* possible values for -o data= */
678 static const arg_desc_t logging_mode[] = {
679 {"ordered", 1 << REISERFS_DATA_ORDERED,
680 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
681 {"journal", 1 << REISERFS_DATA_LOG,
682 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
683 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
684 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
688 /* possible values for -o barrier= */
689 static const arg_desc_t barrier_mode[] = {
690 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
691 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
695 /* possible values for "-o block-allocator=" and bits which are to be set in
696 s_mount_opt of reiserfs specific part of in-core super block */
697 static const arg_desc_t balloc[] = {
698 {"noborder", 1 << REISERFS_NO_BORDER, 0},
699 {"border", 0, 1 << REISERFS_NO_BORDER},
700 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
701 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
702 {"test4", 1 << REISERFS_TEST4, 0},
703 {"notest4", 0, 1 << REISERFS_TEST4},
707 static const arg_desc_t tails[] = {
708 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
709 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
710 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
714 static const arg_desc_t error_actions[] = {
715 {"panic", 1 << REISERFS_ERROR_PANIC,
716 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
717 {"ro-remount", 1 << REISERFS_ERROR_RO,
718 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
719 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
720 {"continue", 1 << REISERFS_ERROR_CONTINUE,
721 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
726 /* proceed only one option from a list *cur - string containing of mount options
727 opts - array of options which are accepted
728 opt_arg - if option is found and requires an argument and if it is specifed
729 in the input - pointer to the argument is stored here
730 bit_flags - if option requires to set a certain bit - it is set here
731 return -1 if unknown option is found, opt->arg_required otherwise */
732 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
733 char **opt_arg, unsigned long *bit_flags)
742 const opt_desc_t *opt;
743 const arg_desc_t *arg;
747 /* assume argument cannot contain commas */
748 *cur = strchr(p, ',');
754 if (!strncmp(p, "alloc=", 6)) {
755 /* Ugly special case, probably we should redo options parser so that
756 it can understand several arguments for some options, also so that
757 it can fill several bitfields with option values. */
758 if (reiserfs_parse_alloc_options(s, p + 6)) {
765 /* for every option in the list */
766 for (opt = opts; opt->option_name; opt++) {
767 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
770 (1 << REISERFS_UNSUPPORTED_OPT))
771 reiserfs_warning(s, "super-6500",
772 "%s not supported.\n",
775 *bit_flags &= ~opt->clrmask;
777 (1 << REISERFS_UNSUPPORTED_OPT))
778 reiserfs_warning(s, "super-6501",
779 "%s not supported.\n",
782 *bit_flags |= opt->setmask;
787 if (!opt->option_name) {
788 reiserfs_warning(s, "super-6502",
789 "unknown mount option \"%s\"", p);
793 p += strlen(opt->option_name);
796 if (!opt->arg_required) {
797 reiserfs_warning(s, "super-6503",
798 "the option \"%s\" does not "
799 "require an argument\n",
806 if (opt->arg_required) {
807 reiserfs_warning(s, "super-6504",
808 "the option \"%s\" requires an "
809 "argument\n", opt->option_name);
814 reiserfs_warning(s, "super-6505",
815 "head of option \"%s\" is only correct\n",
820 /* move to the argument, or to next option if argument is not required */
823 if (opt->arg_required
824 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
826 /* this catches "option=," if not allowed */
827 reiserfs_warning(s, "super-6506",
828 "empty argument for \"%s\"\n",
834 /* *=NULLopt_arg contains pointer to argument */
836 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
839 /* values possible for this option are listed in opt->values */
840 for (arg = opt->values; arg->value; arg++) {
841 if (!strcmp(p, arg->value)) {
843 *bit_flags &= ~arg->clrmask;
844 *bit_flags |= arg->setmask;
846 return opt->arg_required;
850 reiserfs_warning(s, "super-6506",
851 "bad value \"%s\" for option \"%s\"\n", p,
856 /* returns 0 if something is wrong in option string, 1 - otherwise */
857 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
858 unsigned long *mount_options,
859 /* after the parsing phase, contains the
860 collection of bitflags defining what
861 mount options were selected. */
862 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
864 unsigned int *commit_max_age,
871 opt_desc_t opts[] = {
872 /* Compatibility stuff, so that -o notail for old setups still work */
873 {"tails",.arg_required = 't',.values = tails},
875 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
876 {"conv",.setmask = 1 << REISERFS_CONVERT},
877 {"attrs",.setmask = 1 << REISERFS_ATTRS},
878 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
879 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
880 #ifdef CONFIG_REISERFS_FS_XATTR
881 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
882 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
884 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
885 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
887 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
888 {"acl",.setmask = 1 << REISERFS_POSIXACL},
889 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
891 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
892 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
894 {.option_name = "nolog"},
895 {"replayonly",.setmask = 1 << REPLAYONLY},
896 {"block-allocator",.arg_required = 'a',.values = balloc},
897 {"data",.arg_required = 'd',.values = logging_mode},
898 {"barrier",.arg_required = 'b',.values = barrier_mode},
899 {"resize",.arg_required = 'r',.values = NULL},
900 {"jdev",.arg_required = 'j',.values = NULL},
901 {"nolargeio",.arg_required = 'w',.values = NULL},
902 {"commit",.arg_required = 'c',.values = NULL},
903 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
904 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
905 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
906 {"errors",.arg_required = 'e',.values = error_actions},
907 {"usrjquota",.arg_required =
908 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
909 {"grpjquota",.arg_required =
910 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
911 {"jqfmt",.arg_required = 'f',.values = NULL},
912 {.option_name = NULL}
916 if (!options || !*options)
917 /* use default configuration: create tails, journaling on, no
918 conversion to newest format */
921 for (pos = options; pos;) {
922 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
924 /* wrong option is given */
931 /* "resize=NNN" or "resize=auto" */
933 if (!strcmp(arg, "auto")) {
934 /* From JFS code, to auto-get the size. */
936 s->s_bdev->bd_inode->i_size >> s->
939 *blocks = simple_strtoul(arg, &p, 0);
941 /* NNN does not look like a number */
942 reiserfs_warning(s, "super-6507",
952 unsigned long val = simple_strtoul(arg, &p, 0);
953 /* commit=NNN (time in seconds) */
954 if (*p != '\0' || val >= (unsigned int)-1) {
955 reiserfs_warning(s, "super-6508",
956 "bad value %s for -ocommit\n",
960 *commit_max_age = (unsigned int)val;
964 reiserfs_warning(s, "super-6509", "nolargeio option "
965 "is no longer supported");
970 if (arg && *arg && jdev_name) {
971 if (*jdev_name) { //Hm, already assigned?
972 reiserfs_warning(s, "super-6510",
973 "journal device was "
974 "already specified to "
975 "be %s", *jdev_name);
982 if (c == 'u' || c == 'g') {
983 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
985 if (sb_any_quota_loaded(s) &&
986 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
987 reiserfs_warning(s, "super-6511",
988 "cannot change journaled "
989 "quota options when quota "
993 if (*arg) { /* Some filename specified? */
994 if (REISERFS_SB(s)->s_qf_names[qtype]
995 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
997 reiserfs_warning(s, "super-6512",
999 "already specified.",
1003 if (strchr(arg, '/')) {
1004 reiserfs_warning(s, "super-6513",
1005 "quotafile must be "
1006 "on filesystem root.");
1010 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1011 if (!qf_names[qtype]) {
1012 reiserfs_warning(s, "reiserfs-2502",
1013 "not enough memory "
1018 strcpy(qf_names[qtype], arg);
1019 *mount_options |= 1 << REISERFS_QUOTA;
1021 if (qf_names[qtype] !=
1022 REISERFS_SB(s)->s_qf_names[qtype])
1023 kfree(qf_names[qtype]);
1024 qf_names[qtype] = NULL;
1028 if (!strcmp(arg, "vfsold"))
1029 *qfmt = QFMT_VFS_OLD;
1030 else if (!strcmp(arg, "vfsv0"))
1031 *qfmt = QFMT_VFS_V0;
1033 reiserfs_warning(s, "super-6514",
1034 "unknown quota format "
1038 if (sb_any_quota_loaded(s) &&
1039 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1040 reiserfs_warning(s, "super-6515",
1041 "cannot change journaled "
1042 "quota options when quota "
1048 if (c == 'u' || c == 'g' || c == 'f') {
1049 reiserfs_warning(s, "reiserfs-2503", "journaled "
1050 "quota options not supported.");
1057 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1058 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1059 reiserfs_warning(s, "super-6515",
1060 "journaled quota format not specified.");
1063 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1064 if (!(*mount_options & (1 << REISERFS_QUOTA))
1065 && sb_any_quota_loaded(s)) {
1066 reiserfs_warning(s, "super-6516", "quota options must "
1067 "be present when quota is turned on.");
1075 static void switch_data_mode(struct super_block *s, unsigned long mode)
1077 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1078 (1 << REISERFS_DATA_ORDERED) |
1079 (1 << REISERFS_DATA_WRITEBACK));
1080 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1083 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1085 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1086 if (!reiserfs_data_log(s)) {
1087 switch_data_mode(s, REISERFS_DATA_LOG);
1088 reiserfs_info(s, "switching to journaled data mode\n");
1090 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1091 if (!reiserfs_data_ordered(s)) {
1092 switch_data_mode(s, REISERFS_DATA_ORDERED);
1093 reiserfs_info(s, "switching to ordered data mode\n");
1095 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1096 if (!reiserfs_data_writeback(s)) {
1097 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1098 reiserfs_info(s, "switching to writeback data mode\n");
1103 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1105 int flush = (1 << REISERFS_BARRIER_FLUSH);
1106 int none = (1 << REISERFS_BARRIER_NONE);
1107 int all_barrier = flush | none;
1109 if (bits & all_barrier) {
1110 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1112 REISERFS_SB(s)->s_mount_opt |= flush;
1113 printk("reiserfs: enabling write barrier flush mode\n");
1114 } else if (bits & none) {
1115 REISERFS_SB(s)->s_mount_opt |= none;
1116 printk("reiserfs: write barriers turned off\n");
1121 static void handle_attrs(struct super_block *s)
1123 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1125 if (reiserfs_attrs(s)) {
1126 if (old_format_only(s)) {
1127 reiserfs_warning(s, "super-6517", "cannot support "
1128 "attributes on 3.5.x disk format");
1129 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1132 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1133 reiserfs_warning(s, "super-6518", "cannot support "
1134 "attributes until flag is set in "
1136 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1142 static void handle_quota_files(struct super_block *s, char **qf_names,
1147 for (i = 0; i < MAXQUOTAS; i++) {
1148 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1149 kfree(REISERFS_SB(s)->s_qf_names[i]);
1150 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1152 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1156 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1158 struct reiserfs_super_block *rs;
1159 struct reiserfs_transaction_handle th;
1160 unsigned long blocks;
1161 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1162 unsigned long safe_mask = 0;
1163 unsigned int commit_max_age = (unsigned int)-1;
1164 struct reiserfs_journal *journal = SB_JOURNAL(s);
1165 char *new_opts = kstrdup(arg, GFP_KERNEL);
1167 char *qf_names[MAXQUOTAS];
1168 unsigned int qfmt = 0;
1172 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1176 rs = SB_DISK_SUPER_BLOCK(s);
1178 if (!reiserfs_parse_options
1179 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1182 for (i = 0; i < MAXQUOTAS; i++)
1183 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1190 handle_quota_files(s, qf_names, &qfmt);
1195 /* Add options that are safe here */
1196 safe_mask |= 1 << REISERFS_SMALLTAIL;
1197 safe_mask |= 1 << REISERFS_LARGETAIL;
1198 safe_mask |= 1 << REISERFS_NO_BORDER;
1199 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1200 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1201 safe_mask |= 1 << REISERFS_TEST4;
1202 safe_mask |= 1 << REISERFS_ATTRS;
1203 safe_mask |= 1 << REISERFS_XATTRS_USER;
1204 safe_mask |= 1 << REISERFS_POSIXACL;
1205 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1206 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1207 safe_mask |= 1 << REISERFS_ERROR_RO;
1208 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1209 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1210 safe_mask |= 1 << REISERFS_QUOTA;
1212 /* Update the bitmask, taking care to keep
1213 * the bits we're not allowed to change here */
1214 REISERFS_SB(s)->s_mount_opt =
1216 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1218 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1219 journal->j_max_commit_age = commit_max_age;
1220 journal->j_max_trans_age = commit_max_age;
1221 } else if (commit_max_age == 0) {
1222 /* 0 means restore defaults. */
1223 journal->j_max_commit_age = journal->j_default_max_commit_age;
1224 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1228 err = reiserfs_resize(s, blocks);
1233 if (*mount_flags & MS_RDONLY) {
1234 reiserfs_xattr_init(s, *mount_flags);
1235 /* remount read-only */
1236 if (s->s_flags & MS_RDONLY)
1237 /* it is read-only already */
1239 /* try to remount file system with read-only permissions */
1240 if (sb_umount_state(rs) == REISERFS_VALID_FS
1241 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1245 err = journal_begin(&th, s, 10);
1249 /* Mounting a rw partition read-only. */
1250 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1251 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1252 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1254 /* remount read-write */
1255 if (!(s->s_flags & MS_RDONLY)) {
1256 reiserfs_xattr_init(s, *mount_flags);
1257 goto out_ok; /* We are read-write already */
1260 if (reiserfs_is_journal_aborted(journal)) {
1261 err = journal->j_errno;
1265 handle_data_mode(s, mount_options);
1266 handle_barrier_mode(s, mount_options);
1267 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1268 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1269 err = journal_begin(&th, s, 10);
1273 /* Mount a partition which is read-only, read-write */
1274 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1275 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1276 s->s_flags &= ~MS_RDONLY;
1277 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1278 if (!old_format_only(s))
1279 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1280 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1281 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1282 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1284 /* this will force a full flush of all journal lists */
1285 SB_JOURNAL(s)->j_must_wait = 1;
1286 err = journal_end(&th, s, 10);
1291 if (!(*mount_flags & MS_RDONLY)) {
1292 finish_unfinished(s);
1293 reiserfs_xattr_init(s, *mount_flags);
1297 replace_mount_options(s, new_opts);
1307 static int read_super_block(struct super_block *s, int offset)
1309 struct buffer_head *bh;
1310 struct reiserfs_super_block *rs;
1313 bh = sb_bread(s, offset / s->s_blocksize);
1315 reiserfs_warning(s, "sh-2006",
1316 "bread failed (dev %s, block %lu, size %lu)",
1317 reiserfs_bdevname(s), offset / s->s_blocksize,
1322 rs = (struct reiserfs_super_block *)bh->b_data;
1323 if (!is_any_reiserfs_magic_string(rs)) {
1328 // ok, reiserfs signature (old or new) found in at the given offset
1330 fs_blocksize = sb_blocksize(rs);
1332 sb_set_blocksize(s, fs_blocksize);
1334 bh = sb_bread(s, offset / s->s_blocksize);
1336 reiserfs_warning(s, "sh-2007",
1337 "bread failed (dev %s, block %lu, size %lu)",
1338 reiserfs_bdevname(s), offset / s->s_blocksize,
1343 rs = (struct reiserfs_super_block *)bh->b_data;
1344 if (sb_blocksize(rs) != s->s_blocksize) {
1345 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1346 "filesystem on (dev %s, block %Lu, size %lu)",
1347 reiserfs_bdevname(s),
1348 (unsigned long long)bh->b_blocknr,
1354 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1356 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1357 "--rebuild-tree run detected. Please run\n"
1358 "reiserfsck --rebuild-tree and wait for a "
1359 "completion. If that fails\n"
1360 "get newer reiserfsprogs package");
1364 SB_BUFFER_WITH_SB(s) = bh;
1365 SB_DISK_SUPER_BLOCK(s) = rs;
1367 if (is_reiserfs_jr(rs)) {
1368 /* magic is of non-standard journal filesystem, look at s_version to
1369 find which format is in use */
1370 if (sb_version(rs) == REISERFS_VERSION_2)
1371 reiserfs_info(s, "found reiserfs format \"3.6\""
1372 " with non-standard journal\n");
1373 else if (sb_version(rs) == REISERFS_VERSION_1)
1374 reiserfs_info(s, "found reiserfs format \"3.5\""
1375 " with non-standard journal\n");
1377 reiserfs_warning(s, "sh-2012", "found unknown "
1378 "format \"%u\" of reiserfs with "
1379 "non-standard magic", sb_version(rs));
1383 /* s_version of standard format may contain incorrect information,
1384 so we just look at the magic string */
1386 "found reiserfs format \"%s\" with standard journal\n",
1387 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1389 s->s_op = &reiserfs_sops;
1390 s->s_export_op = &reiserfs_export_ops;
1392 s->s_qcop = &reiserfs_qctl_operations;
1393 s->dq_op = &reiserfs_quota_operations;
1396 /* new format is limited by the 32 bit wide i_blocks field, want to
1397 ** be one full block below that.
1399 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1403 /* after journal replay, reread all bitmap and super blocks */
1404 static int reread_meta_blocks(struct super_block *s)
1406 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1407 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1408 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1409 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1416 /////////////////////////////////////////////////////
1417 // hash detection stuff
1419 // if root directory is empty - we set default - Yura's - hash and
1421 // FIXME: we look for only one name in a directory. If tea and yura
1422 // bith have the same value - we ask user to send report to the
1424 static __u32 find_hash_out(struct super_block *s)
1427 struct inode *inode;
1429 INITIALIZE_PATH(path);
1430 struct reiserfs_dir_entry de;
1431 __u32 hash = DEFAULT_HASH;
1433 inode = s->s_root->d_inode;
1435 do { // Some serious "goto"-hater was there ;)
1436 u32 teahash, r5hash, yurahash;
1438 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1439 retval = search_by_entry_key(s, &key, &path, &de);
1440 if (retval == IO_ERROR) {
1444 if (retval == NAME_NOT_FOUND)
1446 set_de_name_and_namelen(&de);
1447 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1448 /* allow override in this case */
1449 if (reiserfs_rupasov_hash(s)) {
1452 reiserfs_info(s, "FS seems to be empty, autodetect "
1453 "is using the default hash\n");
1456 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1457 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1458 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1459 if (((teahash == r5hash)
1461 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1462 == r5hash)) || ((teahash == yurahash)
1464 GET_HASH_VALUE(deh_offset
1469 || ((r5hash == yurahash)
1471 GET_HASH_VALUE(deh_offset
1472 (&(de.de_deh[de.de_entry_num])))))) {
1473 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1474 "automatically detect hash function. "
1475 "Please mount with -o "
1476 "hash={tea,rupasov,r5}");
1480 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1483 else if (GET_HASH_VALUE
1484 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1486 else if (GET_HASH_VALUE
1487 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1490 reiserfs_warning(s, "reiserfs-2506",
1491 "Unrecognised hash function");
1500 // finds out which hash names are sorted with
1501 static int what_hash(struct super_block *s)
1505 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1507 /* reiserfs_hash_detect() == true if any of the hash mount options
1508 ** were used. We must check them to make sure the user isn't
1509 ** using a bad hash value
1511 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1512 code = find_hash_out(s);
1514 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1515 /* detection has found the hash, and we must check against the
1518 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1519 reiserfs_warning(s, "reiserfs-2507",
1520 "Error, %s hash detected, "
1521 "unable to force rupasov hash",
1522 reiserfs_hashname(code));
1524 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1525 reiserfs_warning(s, "reiserfs-2508",
1526 "Error, %s hash detected, "
1527 "unable to force tea hash",
1528 reiserfs_hashname(code));
1530 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1531 reiserfs_warning(s, "reiserfs-2509",
1532 "Error, %s hash detected, "
1533 "unable to force r5 hash",
1534 reiserfs_hashname(code));
1538 /* find_hash_out was not called or could not determine the hash */
1539 if (reiserfs_rupasov_hash(s)) {
1541 } else if (reiserfs_tea_hash(s)) {
1543 } else if (reiserfs_r5_hash(s)) {
1548 /* if we are mounted RW, and we have a new valid hash code, update
1551 if (code != UNSET_HASH &&
1552 !(s->s_flags & MS_RDONLY) &&
1553 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1554 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1559 // return pointer to appropriate function
1560 static hashf_t hash_function(struct super_block *s)
1562 switch (what_hash(s)) {
1564 reiserfs_info(s, "Using tea hash to sort names\n");
1567 reiserfs_info(s, "Using rupasov hash to sort names\n");
1570 reiserfs_info(s, "Using r5 hash to sort names\n");
1576 // this is used to set up correct value for old partitions
1577 static int function2code(hashf_t func)
1579 if (func == keyed_hash)
1581 if (func == yura_hash)
1583 if (func == r5_hash)
1586 BUG(); // should never happen
1591 #define SWARN(silent, s, id, ...) \
1593 reiserfs_warning(s, id, __VA_ARGS__)
1595 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1597 struct inode *root_inode;
1598 struct reiserfs_transaction_handle th;
1600 unsigned long blocks;
1601 unsigned int commit_max_age = 0;
1603 struct reiserfs_iget_args args;
1604 struct reiserfs_super_block *rs;
1606 struct reiserfs_sb_info *sbi;
1607 int errval = -EINVAL;
1608 char *qf_names[MAXQUOTAS] = {};
1609 unsigned int qfmt = 0;
1611 save_mount_options(s, data);
1613 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1619 /* Set default values for options: non-aggressive tails, RO on errors */
1620 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1621 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1622 /* no preallocation minimum, be smart in
1623 reiserfs_file_write instead */
1624 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1625 /* Preallocate by 16 blocks (17-1) at once */
1626 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1627 /* setup default block allocator options */
1628 reiserfs_init_alloc_options(s);
1631 if (reiserfs_parse_options
1632 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1633 &commit_max_age, qf_names, &qfmt) == 0) {
1637 handle_quota_files(s, qf_names, &qfmt);
1641 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1645 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1646 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1648 /* try new format (64-th 1k block), which can contain reiserfs super block */
1649 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1650 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1651 reiserfs_bdevname(s));
1655 rs = SB_DISK_SUPER_BLOCK(s);
1656 /* Let's do basic sanity check to verify that underlying device is not
1657 smaller than the filesystem. If the check fails then abort and scream,
1658 because bad stuff will happen otherwise. */
1659 if (s->s_bdev && s->s_bdev->bd_inode
1660 && i_size_read(s->s_bdev->bd_inode) <
1661 sb_block_count(rs) * sb_blocksize(rs)) {
1662 SWARN(silent, s, "", "Filesystem cannot be "
1663 "mounted because it is bigger than the device");
1664 SWARN(silent, s, "", "You may need to run fsck "
1665 "or increase size of your LVM partition");
1666 SWARN(silent, s, "", "Or may be you forgot to "
1667 "reboot after fdisk when it told you to");
1671 sbi->s_mount_state = SB_REISERFS_STATE(s);
1672 sbi->s_mount_state = REISERFS_VALID_FS;
1674 if ((errval = reiserfs_init_bitmap_cache(s))) {
1675 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1679 #ifdef CONFIG_REISERFS_CHECK
1680 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1681 SWARN(silent, s, "", "- it is slow mode for debugging.");
1684 /* make data=ordered the default */
1685 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1686 !reiserfs_data_writeback(s)) {
1687 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1690 if (reiserfs_data_log(s)) {
1691 reiserfs_info(s, "using journaled data mode\n");
1692 } else if (reiserfs_data_ordered(s)) {
1693 reiserfs_info(s, "using ordered data mode\n");
1695 reiserfs_info(s, "using writeback data mode\n");
1697 if (reiserfs_barrier_flush(s)) {
1698 printk("reiserfs: using flush barriers\n");
1700 // set_device_ro(s->s_dev, 1) ;
1701 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1702 SWARN(silent, s, "sh-2022",
1703 "unable to initialize journal space");
1706 jinit_done = 1; /* once this is set, journal_release must be called
1707 ** if we error out of the mount
1710 if (reread_meta_blocks(s)) {
1711 SWARN(silent, s, "jmacd-9",
1712 "unable to reread meta blocks after journal init");
1719 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1720 SWARN(silent, s, "clm-7000",
1721 "Detected readonly device, marking FS readonly");
1722 s->s_flags |= MS_RDONLY;
1724 args.objectid = REISERFS_ROOT_OBJECTID;
1725 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1727 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1728 reiserfs_init_locked_inode, (void *)(&args));
1730 SWARN(silent, s, "jmacd-10", "get root inode failed");
1734 if (root_inode->i_state & I_NEW) {
1735 reiserfs_read_locked_inode(root_inode, &args);
1736 unlock_new_inode(root_inode);
1739 s->s_root = d_alloc_root(root_inode);
1744 // define and initialize hash function
1745 sbi->s_hash_function = hash_function(s);
1746 if (sbi->s_hash_function == NULL) {
1752 if (is_reiserfs_3_5(rs)
1753 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1754 set_bit(REISERFS_3_5, &(sbi->s_properties));
1755 else if (old_format)
1756 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1758 set_bit(REISERFS_3_6, &(sbi->s_properties));
1760 if (!(s->s_flags & MS_RDONLY)) {
1762 errval = journal_begin(&th, s, 1);
1768 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1770 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1771 set_sb_fs_state(rs, 0);
1773 /* Clear out s_bmap_nr if it would wrap. We can handle this
1774 * case, but older revisions can't. This will cause the
1775 * file system to fail mount on those older implementations,
1776 * avoiding corruption. -jeffm */
1777 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1778 sb_bmap_nr(rs) != 0) {
1779 reiserfs_warning(s, "super-2030", "This file system "
1780 "claims to use %u bitmap blocks in "
1781 "its super block, but requires %u. "
1782 "Clearing to zero.", sb_bmap_nr(rs),
1783 reiserfs_bmap_count(s));
1785 set_sb_bmap_nr(rs, 0);
1788 if (old_format_only(s)) {
1789 /* filesystem of format 3.5 either with standard or non-standard
1791 if (convert_reiserfs(s)) {
1792 /* and -o conv is given */
1795 "converting 3.5 filesystem to the 3.6 format");
1797 if (is_reiserfs_3_5(rs))
1798 /* put magic string of 3.6 format. 2.2 will not be able to
1799 mount this filesystem anymore */
1800 memcpy(rs->s_v1.s_magic,
1801 reiserfs_3_6_magic_string,
1803 (reiserfs_3_6_magic_string));
1805 set_sb_version(rs, REISERFS_VERSION_2);
1806 reiserfs_convert_objectid_map_v1(s);
1807 set_bit(REISERFS_3_6, &(sbi->s_properties));
1808 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1809 } else if (!silent) {
1810 reiserfs_info(s, "using 3.5.x disk format\n");
1813 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1816 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1817 errval = journal_end(&th, s, 1);
1824 if ((errval = reiserfs_lookup_privroot(s)) ||
1825 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1831 /* look for files which were to be removed in previous session */
1832 finish_unfinished(s);
1834 if (old_format_only(s) && !silent) {
1835 reiserfs_info(s, "using 3.5.x disk format\n");
1838 if ((errval = reiserfs_lookup_privroot(s)) ||
1839 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1845 // mark hash in super block: it could be unset. overwrite should be ok
1846 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1850 reiserfs_proc_info_init(s);
1852 init_waitqueue_head(&(sbi->s_wait));
1853 spin_lock_init(&sbi->bitmap_lock);
1858 if (jinit_done) { /* kill the commit thread, free journal ram */
1859 journal_release_error(NULL, s);
1862 reiserfs_free_bitmap_cache(s);
1863 if (SB_BUFFER_WITH_SB(s))
1864 brelse(SB_BUFFER_WITH_SB(s));
1868 for (j = 0; j < MAXQUOTAS; j++)
1874 s->s_fs_info = NULL;
1878 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1880 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1882 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1883 buf->f_bfree = sb_free_blocks(rs);
1884 buf->f_bavail = buf->f_bfree;
1885 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1886 buf->f_bsize = dentry->d_sb->s_blocksize;
1887 /* changed to accommodate gcc folks. */
1888 buf->f_type = REISERFS_SUPER_MAGIC;
1889 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1890 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1891 sizeof(rs->s_uuid)/2);
1897 static int reiserfs_write_dquot(struct dquot *dquot)
1899 struct reiserfs_transaction_handle th;
1902 reiserfs_write_lock(dquot->dq_sb);
1904 journal_begin(&th, dquot->dq_sb,
1905 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1908 ret = dquot_commit(dquot);
1910 journal_end(&th, dquot->dq_sb,
1911 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1915 reiserfs_write_unlock(dquot->dq_sb);
1919 static int reiserfs_acquire_dquot(struct dquot *dquot)
1921 struct reiserfs_transaction_handle th;
1924 reiserfs_write_lock(dquot->dq_sb);
1926 journal_begin(&th, dquot->dq_sb,
1927 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1930 ret = dquot_acquire(dquot);
1932 journal_end(&th, dquot->dq_sb,
1933 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1937 reiserfs_write_unlock(dquot->dq_sb);
1941 static int reiserfs_release_dquot(struct dquot *dquot)
1943 struct reiserfs_transaction_handle th;
1946 reiserfs_write_lock(dquot->dq_sb);
1948 journal_begin(&th, dquot->dq_sb,
1949 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1951 /* Release dquot anyway to avoid endless cycle in dqput() */
1952 dquot_release(dquot);
1955 ret = dquot_release(dquot);
1957 journal_end(&th, dquot->dq_sb,
1958 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1962 reiserfs_write_unlock(dquot->dq_sb);
1966 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1968 /* Are we journaling quotas? */
1969 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1970 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1971 dquot_mark_dquot_dirty(dquot);
1972 return reiserfs_write_dquot(dquot);
1974 return dquot_mark_dquot_dirty(dquot);
1977 static int reiserfs_write_info(struct super_block *sb, int type)
1979 struct reiserfs_transaction_handle th;
1982 /* Data block + inode block */
1983 reiserfs_write_lock(sb);
1984 ret = journal_begin(&th, sb, 2);
1987 ret = dquot_commit_info(sb, type);
1988 err = journal_end(&th, sb, 2);
1992 reiserfs_write_unlock(sb);
1997 * Turn on quotas during mount time - we need to find the quota file and such...
1999 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2001 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2002 REISERFS_SB(sb)->s_jquota_fmt, type);
2006 * Standard function to be called on quota_on
2008 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2009 char *name, int remount)
2013 struct inode *inode;
2014 struct reiserfs_transaction_handle th;
2016 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2018 /* No more checks needed? Path and format_id are bogus anyway... */
2020 return vfs_quota_on(sb, type, format_id, name, 1);
2021 err = kern_path(name, LOOKUP_FOLLOW, &path);
2024 /* Quotafile not on the same filesystem? */
2025 if (path.mnt->mnt_sb != sb) {
2029 inode = path.dentry->d_inode;
2030 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2031 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2032 err = reiserfs_unpack(inode, NULL);
2034 reiserfs_warning(sb, "super-6520",
2035 "Unpacking tail of quota file failed"
2036 " (%d). Cannot turn on quotas.", err);
2040 mark_inode_dirty(inode);
2042 /* Journaling quota? */
2043 if (REISERFS_SB(sb)->s_qf_names[type]) {
2044 /* Quotafile not of fs root? */
2045 if (path.dentry->d_parent != sb->s_root)
2046 reiserfs_warning(sb, "super-6521",
2047 "Quota file not on filesystem root. "
2048 "Journalled quota will not work.");
2052 * When we journal data on quota file, we have to flush journal to see
2053 * all updates to the file when we bypass pagecache...
2055 if (reiserfs_file_data_log(inode)) {
2056 /* Just start temporary transaction and finish it */
2057 err = journal_begin(&th, sb, 1);
2060 err = journal_end_sync(&th, sb, 1);
2064 err = vfs_quota_on_path(sb, type, format_id, &path);
2070 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2071 * acquiring the locks... As quota files are never truncated and quota code
2072 * itself serializes the operations (and noone else should touch the files)
2073 * we don't have to be afraid of races */
2074 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2075 size_t len, loff_t off)
2077 struct inode *inode = sb_dqopt(sb)->files[type];
2078 unsigned long blk = off >> sb->s_blocksize_bits;
2079 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2081 struct buffer_head tmp_bh, *bh;
2082 loff_t i_size = i_size_read(inode);
2086 if (off + len > i_size)
2089 while (toread > 0) {
2091 sb->s_blocksize - offset <
2092 toread ? sb->s_blocksize - offset : toread;
2094 /* Quota files are without tails so we can safely use this function */
2095 reiserfs_write_lock(sb);
2096 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2097 reiserfs_write_unlock(sb);
2100 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2101 memset(data, 0, tocopy);
2103 bh = sb_bread(sb, tmp_bh.b_blocknr);
2106 memcpy(data, bh->b_data + offset, tocopy);
2117 /* Write to quotafile (we know the transaction is already started and has
2118 * enough credits) */
2119 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2120 const char *data, size_t len, loff_t off)
2122 struct inode *inode = sb_dqopt(sb)->files[type];
2123 unsigned long blk = off >> sb->s_blocksize_bits;
2124 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2125 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2126 size_t towrite = len;
2127 struct buffer_head tmp_bh, *bh;
2129 if (!current->journal_info) {
2130 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2131 " cancelled because transaction is not started.\n",
2132 (unsigned long long)off, (unsigned long long)len);
2135 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2136 while (towrite > 0) {
2137 tocopy = sb->s_blocksize - offset < towrite ?
2138 sb->s_blocksize - offset : towrite;
2140 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2143 if (offset || tocopy != sb->s_blocksize)
2144 bh = sb_bread(sb, tmp_bh.b_blocknr);
2146 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2152 memcpy(bh->b_data + offset, data, tocopy);
2153 flush_dcache_page(bh->b_page);
2154 set_buffer_uptodate(bh);
2156 reiserfs_prepare_for_journal(sb, bh, 1);
2157 journal_mark_dirty(current->journal_info, sb, bh);
2159 reiserfs_add_ordered_list(inode, bh);
2167 if (len == towrite) {
2168 mutex_unlock(&inode->i_mutex);
2171 if (inode->i_size < off + len - towrite)
2172 i_size_write(inode, off + len - towrite);
2174 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2175 mark_inode_dirty(inode);
2176 mutex_unlock(&inode->i_mutex);
2177 return len - towrite;
2182 static int get_super_block(struct file_system_type *fs_type,
2183 int flags, const char *dev_name,
2184 void *data, struct vfsmount *mnt)
2186 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2190 static int __init init_reiserfs_fs(void)
2194 if ((ret = init_inodecache())) {
2198 reiserfs_proc_info_global_init();
2199 reiserfs_proc_register_global("version",
2200 reiserfs_global_version_in_proc);
2202 ret = register_filesystem(&reiserfs_fs_type);
2208 reiserfs_proc_unregister_global("version");
2209 reiserfs_proc_info_global_done();
2210 destroy_inodecache();
2215 static void __exit exit_reiserfs_fs(void)
2217 reiserfs_proc_unregister_global("version");
2218 reiserfs_proc_info_global_done();
2219 unregister_filesystem(&reiserfs_fs_type);
2220 destroy_inodecache();
2223 struct file_system_type reiserfs_fs_type = {
2224 .owner = THIS_MODULE,
2226 .get_sb = get_super_block,
2227 .kill_sb = reiserfs_kill_sb,
2228 .fs_flags = FS_REQUIRES_DEV,
2231 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2232 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2233 MODULE_LICENSE("GPL");
2235 module_init(init_reiserfs_fs);
2236 module_exit(exit_reiserfs_fs);