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/smp_lock.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);
66 static int reiserfs_sync_fs(struct super_block *s, int wait)
68 struct reiserfs_transaction_handle th;
70 reiserfs_write_lock(s);
71 if (!journal_begin(&th, s, 1))
72 if (!journal_end_sync(&th, s, 1))
73 reiserfs_flush_old_commits(s);
74 s->s_dirt = 0; /* Even if it's not true.
75 * We'll loop forever in sync_supers otherwise */
76 reiserfs_write_unlock(s);
80 static void reiserfs_write_super(struct super_block *s)
82 reiserfs_sync_fs(s, 1);
85 static int reiserfs_freeze(struct super_block *s)
87 struct reiserfs_transaction_handle th;
88 reiserfs_write_lock(s);
89 if (!(s->s_flags & MS_RDONLY)) {
90 int err = journal_begin(&th, s, 1);
92 reiserfs_block_writes(&th);
94 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
96 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
97 reiserfs_block_writes(&th);
98 journal_end_sync(&th, s, 1);
102 reiserfs_write_unlock(s);
106 static int reiserfs_unfreeze(struct super_block *s)
108 reiserfs_allow_writes(s);
112 extern const struct in_core_key MAX_IN_CORE_KEY;
114 /* this is used to delete "save link" when there are no items of a
115 file it points to. It can either happen if unlink is completed but
116 "save unlink" removal, or if file has both unlink and truncate
117 pending and as unlink completes first (because key of "save link"
118 protecting unlink is bigger that a key lf "save link" which
119 protects truncate), so there left no items to make truncate
121 static int remove_save_link_only(struct super_block *s,
122 struct reiserfs_key *key, int oid_free)
124 struct reiserfs_transaction_handle th;
127 /* we are going to do one balancing */
128 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
132 reiserfs_delete_solid_item(&th, NULL, key);
134 /* removals are protected by direct items */
135 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
137 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
141 static int reiserfs_quota_on_mount(struct super_block *, int);
144 /* look for uncompleted unlinks and truncates and complete them */
145 static int finish_unfinished(struct super_block *s)
147 INITIALIZE_PATH(path);
148 struct cpu_key max_cpu_key, obj_key;
149 struct reiserfs_key save_link_key, last_inode_key;
151 struct item_head *ih;
152 struct buffer_head *bh;
163 /* compose key to look for "save" links */
164 max_cpu_key.version = KEY_FORMAT_3_5;
165 max_cpu_key.on_disk_key.k_dir_id = ~0U;
166 max_cpu_key.on_disk_key.k_objectid = ~0U;
167 set_cpu_key_k_offset(&max_cpu_key, ~0U);
168 max_cpu_key.key_length = 3;
170 memset(&last_inode_key, 0, sizeof(last_inode_key));
173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
178 s->s_flags |= MS_ACTIVE;
180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
182 if (REISERFS_SB(s)->s_qf_names[i]) {
183 int ret = reiserfs_quota_on_mount(s, i);
185 reiserfs_warning(s, "reiserfs-2500",
186 "cannot turn on journaled "
187 "quota: error %d", ret);
193 REISERFS_SB(s)->s_is_unlinked_ok = 1;
195 retval = search_item(s, &max_cpu_key, &path);
196 if (retval != ITEM_NOT_FOUND) {
197 reiserfs_error(s, "vs-2140",
198 "search_by_key returned %d", retval);
202 bh = get_last_bh(&path);
203 item_pos = get_item_pos(&path);
204 if (item_pos != B_NR_ITEMS(bh)) {
205 reiserfs_warning(s, "vs-2060",
206 "wrong position found");
210 ih = B_N_PITEM_HEAD(bh, item_pos);
212 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
213 /* there are no "save" links anymore */
216 save_link_key = ih->ih_key;
217 if (is_indirect_le_ih(ih))
222 /* reiserfs_iget needs k_dirid and k_objectid only */
223 item = B_I_PITEM(bh, ih);
224 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
225 obj_key.on_disk_key.k_objectid =
226 le32_to_cpu(ih->ih_key.k_objectid);
227 obj_key.on_disk_key.k_offset = 0;
228 obj_key.on_disk_key.k_type = 0;
232 inode = reiserfs_iget(s, &obj_key);
234 /* the unlink almost completed, it just did not manage to remove
235 "save" link and release objectid */
236 reiserfs_warning(s, "vs-2180", "iget failed for %K",
238 retval = remove_save_link_only(s, &save_link_key, 1);
242 if (!truncate && inode->i_nlink) {
243 /* file is not unlinked */
244 reiserfs_warning(s, "vs-2185",
245 "file %K is not unlinked",
247 retval = remove_save_link_only(s, &save_link_key, 0);
250 dquot_initialize(inode);
252 if (truncate && S_ISDIR(inode->i_mode)) {
253 /* We got a truncate request for a dir which is impossible.
254 The only imaginable way is to execute unfinished truncate request
255 then boot into old kernel, remove the file and create dir with
257 reiserfs_warning(s, "green-2101",
258 "impossible truncate on a "
259 "directory %k. Please report",
261 retval = remove_save_link_only(s, &save_link_key, 0);
268 REISERFS_I(inode)->i_flags |=
269 i_link_saved_truncate_mask;
270 /* not completed truncate found. New size was committed together
272 reiserfs_info(s, "Truncating %k to %Ld ..",
273 INODE_PKEY(inode), inode->i_size);
274 reiserfs_truncate_file(inode,
276 /*don't update modification time */
278 retval = remove_save_link(inode, truncate);
280 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
281 /* not completed unlink (rmdir) found */
282 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
283 if (memcmp(&last_inode_key, INODE_PKEY(inode),
284 sizeof(last_inode_key))){
285 last_inode_key = *INODE_PKEY(inode);
286 /* removal gets completed in iput */
289 reiserfs_warning(s, "super-2189", "Dead loop "
290 "in finish_unfinished "
291 "detected, just remove "
293 retval = remove_save_link_only(s,
302 REISERFS_SB(s)->s_is_unlinked_ok = 0;
305 /* Turn quotas off */
306 for (i = 0; i < MAXQUOTAS; i++) {
307 if (sb_dqopt(s)->files[i])
308 dquot_quota_off(s, i);
311 /* Restore the flag back */
312 s->s_flags &= ~MS_ACTIVE;
316 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
317 "Completed\n", done);
321 /* to protect file being unlinked from getting lost we "safe" link files
322 being unlinked. This link will be deleted in the same transaction with last
323 item of file. mounting the filesystem we scan all these links and remove
324 files which almost got lost */
325 void add_save_link(struct reiserfs_transaction_handle *th,
326 struct inode *inode, int truncate)
328 INITIALIZE_PATH(path);
334 BUG_ON(!th->t_trans_id);
336 /* file can only get one "save link" of each kind */
338 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
339 "saved link already exists for truncated inode %lx",
342 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
343 "saved link already exists for unlinked inode %lx",
346 /* setup key of "save" link */
347 key.version = KEY_FORMAT_3_5;
348 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
349 key.on_disk_key.k_objectid = inode->i_ino;
351 /* unlink, rmdir, rename */
352 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
353 set_cpu_key_k_type(&key, TYPE_DIRECT);
355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version,
357 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
358 4 /*length */ , 0xffff /*free space */ );
361 if (S_ISDIR(inode->i_mode))
362 reiserfs_warning(inode->i_sb, "green-2102",
363 "Adding a truncate savelink for "
364 "a directory %k! Please report",
366 set_cpu_key_k_offset(&key, 1);
367 set_cpu_key_k_type(&key, TYPE_INDIRECT);
369 /* item head of "safe" link */
370 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
371 4 /*length */ , 0 /*free space */ );
375 /* look for its place in the tree */
376 retval = search_item(inode->i_sb, &key, &path);
377 if (retval != ITEM_NOT_FOUND) {
378 if (retval != -ENOSPC)
379 reiserfs_error(inode->i_sb, "vs-2100",
380 "search_by_key (%K) returned %d", &key,
386 /* body of "save" link */
387 link = INODE_PKEY(inode)->k_dir_id;
389 /* put "save" link inot tree, don't charge quota to anyone */
391 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
393 if (retval != -ENOSPC)
394 reiserfs_error(inode->i_sb, "vs-2120",
395 "insert_item returned %d", retval);
398 REISERFS_I(inode)->i_flags |=
399 i_link_saved_truncate_mask;
401 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
405 /* this opens transaction unlike add_save_link */
406 int remove_save_link(struct inode *inode, int truncate)
408 struct reiserfs_transaction_handle th;
409 struct reiserfs_key key;
412 /* we are going to do one balancing only */
413 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
417 /* setup key of "save" link */
418 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
419 key.k_objectid = INODE_PKEY(inode)->k_objectid;
421 /* unlink, rmdir, rename */
422 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
423 1 + inode->i_sb->s_blocksize);
424 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
427 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
428 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
432 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
434 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
435 /* don't take quota bytes from anywhere */
436 reiserfs_delete_solid_item(&th, NULL, &key);
438 reiserfs_release_objectid(&th, inode->i_ino);
439 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
441 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
443 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
446 static void reiserfs_kill_sb(struct super_block *s)
448 if (REISERFS_SB(s)) {
449 if (REISERFS_SB(s)->xattr_root) {
450 d_invalidate(REISERFS_SB(s)->xattr_root);
451 dput(REISERFS_SB(s)->xattr_root);
452 REISERFS_SB(s)->xattr_root = NULL;
454 if (REISERFS_SB(s)->priv_root) {
455 d_invalidate(REISERFS_SB(s)->priv_root);
456 dput(REISERFS_SB(s)->priv_root);
457 REISERFS_SB(s)->priv_root = NULL;
464 static void reiserfs_put_super(struct super_block *s)
466 struct reiserfs_transaction_handle th;
469 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
471 reiserfs_write_lock(s);
474 reiserfs_write_super(s);
476 /* change file system state to current state if it was mounted with read-write permissions */
477 if (!(s->s_flags & MS_RDONLY)) {
478 if (!journal_begin(&th, s, 10)) {
479 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
481 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
482 REISERFS_SB(s)->s_mount_state);
483 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
487 /* note, journal_release checks for readonly mount, and can decide not
488 ** to do a journal_end
490 journal_release(&th, s);
492 reiserfs_free_bitmap_cache(s);
494 brelse(SB_BUFFER_WITH_SB(s));
498 if (REISERFS_SB(s)->reserved_blocks != 0) {
499 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
500 REISERFS_SB(s)->reserved_blocks);
503 reiserfs_proc_info_done(s);
505 reiserfs_write_unlock(s);
506 mutex_destroy(&REISERFS_SB(s)->lock);
511 static struct kmem_cache *reiserfs_inode_cachep;
513 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
515 struct reiserfs_inode_info *ei;
516 ei = (struct reiserfs_inode_info *)
517 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
520 return &ei->vfs_inode;
523 static void reiserfs_destroy_inode(struct inode *inode)
525 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
528 static void init_once(void *foo)
530 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
532 INIT_LIST_HEAD(&ei->i_prealloc_list);
533 inode_init_once(&ei->vfs_inode);
536 static int init_inodecache(void)
538 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
540 reiserfs_inode_info),
541 0, (SLAB_RECLAIM_ACCOUNT|
544 if (reiserfs_inode_cachep == NULL)
549 static void destroy_inodecache(void)
551 kmem_cache_destroy(reiserfs_inode_cachep);
554 /* we don't mark inodes dirty, we just log them */
555 static void reiserfs_dirty_inode(struct inode *inode)
557 struct reiserfs_transaction_handle th;
562 if (inode->i_sb->s_flags & MS_RDONLY) {
563 reiserfs_warning(inode->i_sb, "clm-6006",
564 "writing inode %lu on readonly FS",
568 lock_depth = reiserfs_write_lock_once(inode->i_sb);
570 /* this is really only used for atime updates, so they don't have
571 ** to be included in O_SYNC or fsync
573 err = journal_begin(&th, inode->i_sb, 1);
577 reiserfs_update_sd(&th, inode);
578 journal_end(&th, inode->i_sb, 1);
581 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
584 static void reiserfs_clear_inode(struct inode *inode)
590 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
592 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
596 static const struct super_operations reiserfs_sops = {
597 .alloc_inode = reiserfs_alloc_inode,
598 .destroy_inode = reiserfs_destroy_inode,
599 .write_inode = reiserfs_write_inode,
600 .dirty_inode = reiserfs_dirty_inode,
601 .clear_inode = reiserfs_clear_inode,
602 .delete_inode = reiserfs_delete_inode,
603 .put_super = reiserfs_put_super,
604 .write_super = reiserfs_write_super,
605 .sync_fs = reiserfs_sync_fs,
606 .freeze_fs = reiserfs_freeze,
607 .unfreeze_fs = reiserfs_unfreeze,
608 .statfs = reiserfs_statfs,
609 .remount_fs = reiserfs_remount,
610 .show_options = generic_show_options,
612 .quota_read = reiserfs_quota_read,
613 .quota_write = reiserfs_quota_write,
618 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
620 static int reiserfs_write_dquot(struct dquot *);
621 static int reiserfs_acquire_dquot(struct dquot *);
622 static int reiserfs_release_dquot(struct dquot *);
623 static int reiserfs_mark_dquot_dirty(struct dquot *);
624 static int reiserfs_write_info(struct super_block *, int);
625 static int reiserfs_quota_on(struct super_block *, int, int, char *);
627 static const struct dquot_operations reiserfs_quota_operations = {
628 .write_dquot = reiserfs_write_dquot,
629 .acquire_dquot = reiserfs_acquire_dquot,
630 .release_dquot = reiserfs_release_dquot,
631 .mark_dirty = reiserfs_mark_dquot_dirty,
632 .write_info = reiserfs_write_info,
633 .alloc_dquot = dquot_alloc,
634 .destroy_dquot = dquot_destroy,
637 static const struct quotactl_ops reiserfs_qctl_operations = {
638 .quota_on = reiserfs_quota_on,
639 .quota_off = dquot_quota_off,
640 .quota_sync = dquot_quota_sync,
641 .get_info = dquot_get_dqinfo,
642 .set_info = dquot_set_dqinfo,
643 .get_dqblk = dquot_get_dqblk,
644 .set_dqblk = dquot_set_dqblk,
648 static const struct export_operations reiserfs_export_ops = {
649 .encode_fh = reiserfs_encode_fh,
650 .fh_to_dentry = reiserfs_fh_to_dentry,
651 .fh_to_parent = reiserfs_fh_to_parent,
652 .get_parent = reiserfs_get_parent,
655 /* this struct is used in reiserfs_getopt () for containing the value for those
656 mount options that have values rather than being toggles. */
659 int setmask; /* bitmask which is to set on mount_options bitmask when this
660 value is found, 0 is no bits are to be changed. */
661 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
662 value is found, 0 is no bits are to be changed. This is
663 applied BEFORE setmask */
666 /* Set this bit in arg_required to allow empty arguments */
667 #define REISERFS_OPT_ALLOWEMPTY 31
669 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
673 int arg_required; /* 0 if argument is not required, not 0 otherwise */
674 const arg_desc_t *values; /* list of values accepted by an option */
675 int setmask; /* bitmask which is to set on mount_options bitmask when this
676 value is found, 0 is no bits are to be changed. */
677 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
678 value is found, 0 is no bits are to be changed. This is
679 applied BEFORE setmask */
682 /* possible values for -o data= */
683 static const arg_desc_t logging_mode[] = {
684 {"ordered", 1 << REISERFS_DATA_ORDERED,
685 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
686 {"journal", 1 << REISERFS_DATA_LOG,
687 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
688 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
689 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
693 /* possible values for -o barrier= */
694 static const arg_desc_t barrier_mode[] = {
695 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
696 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
700 /* possible values for "-o block-allocator=" and bits which are to be set in
701 s_mount_opt of reiserfs specific part of in-core super block */
702 static const arg_desc_t balloc[] = {
703 {"noborder", 1 << REISERFS_NO_BORDER, 0},
704 {"border", 0, 1 << REISERFS_NO_BORDER},
705 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
706 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
707 {"test4", 1 << REISERFS_TEST4, 0},
708 {"notest4", 0, 1 << REISERFS_TEST4},
712 static const arg_desc_t tails[] = {
713 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
714 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
715 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
719 static const arg_desc_t error_actions[] = {
720 {"panic", 1 << REISERFS_ERROR_PANIC,
721 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
722 {"ro-remount", 1 << REISERFS_ERROR_RO,
723 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
724 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
725 {"continue", 1 << REISERFS_ERROR_CONTINUE,
726 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
731 /* proceed only one option from a list *cur - string containing of mount options
732 opts - array of options which are accepted
733 opt_arg - if option is found and requires an argument and if it is specifed
734 in the input - pointer to the argument is stored here
735 bit_flags - if option requires to set a certain bit - it is set here
736 return -1 if unknown option is found, opt->arg_required otherwise */
737 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
738 char **opt_arg, unsigned long *bit_flags)
747 const opt_desc_t *opt;
748 const arg_desc_t *arg;
752 /* assume argument cannot contain commas */
753 *cur = strchr(p, ',');
759 if (!strncmp(p, "alloc=", 6)) {
760 /* Ugly special case, probably we should redo options parser so that
761 it can understand several arguments for some options, also so that
762 it can fill several bitfields with option values. */
763 if (reiserfs_parse_alloc_options(s, p + 6)) {
770 /* for every option in the list */
771 for (opt = opts; opt->option_name; opt++) {
772 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
775 (1 << REISERFS_UNSUPPORTED_OPT))
776 reiserfs_warning(s, "super-6500",
777 "%s not supported.\n",
780 *bit_flags &= ~opt->clrmask;
782 (1 << REISERFS_UNSUPPORTED_OPT))
783 reiserfs_warning(s, "super-6501",
784 "%s not supported.\n",
787 *bit_flags |= opt->setmask;
792 if (!opt->option_name) {
793 reiserfs_warning(s, "super-6502",
794 "unknown mount option \"%s\"", p);
798 p += strlen(opt->option_name);
801 if (!opt->arg_required) {
802 reiserfs_warning(s, "super-6503",
803 "the option \"%s\" does not "
804 "require an argument\n",
811 if (opt->arg_required) {
812 reiserfs_warning(s, "super-6504",
813 "the option \"%s\" requires an "
814 "argument\n", opt->option_name);
819 reiserfs_warning(s, "super-6505",
820 "head of option \"%s\" is only correct\n",
825 /* move to the argument, or to next option if argument is not required */
828 if (opt->arg_required
829 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
831 /* this catches "option=," if not allowed */
832 reiserfs_warning(s, "super-6506",
833 "empty argument for \"%s\"\n",
839 /* *=NULLopt_arg contains pointer to argument */
841 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
844 /* values possible for this option are listed in opt->values */
845 for (arg = opt->values; arg->value; arg++) {
846 if (!strcmp(p, arg->value)) {
848 *bit_flags &= ~arg->clrmask;
849 *bit_flags |= arg->setmask;
851 return opt->arg_required;
855 reiserfs_warning(s, "super-6506",
856 "bad value \"%s\" for option \"%s\"\n", p,
861 /* returns 0 if something is wrong in option string, 1 - otherwise */
862 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
863 unsigned long *mount_options,
864 /* after the parsing phase, contains the
865 collection of bitflags defining what
866 mount options were selected. */
867 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
869 unsigned int *commit_max_age,
876 opt_desc_t opts[] = {
877 /* Compatibility stuff, so that -o notail for old setups still work */
878 {"tails",.arg_required = 't',.values = tails},
880 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
881 {"conv",.setmask = 1 << REISERFS_CONVERT},
882 {"attrs",.setmask = 1 << REISERFS_ATTRS},
883 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
884 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
885 #ifdef CONFIG_REISERFS_FS_XATTR
886 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
887 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
889 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
890 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
892 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
893 {"acl",.setmask = 1 << REISERFS_POSIXACL},
894 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
896 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
897 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
899 {.option_name = "nolog"},
900 {"replayonly",.setmask = 1 << REPLAYONLY},
901 {"block-allocator",.arg_required = 'a',.values = balloc},
902 {"data",.arg_required = 'd',.values = logging_mode},
903 {"barrier",.arg_required = 'b',.values = barrier_mode},
904 {"resize",.arg_required = 'r',.values = NULL},
905 {"jdev",.arg_required = 'j',.values = NULL},
906 {"nolargeio",.arg_required = 'w',.values = NULL},
907 {"commit",.arg_required = 'c',.values = NULL},
908 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
909 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
910 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
911 {"errors",.arg_required = 'e',.values = error_actions},
912 {"usrjquota",.arg_required =
913 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
914 {"grpjquota",.arg_required =
915 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
916 {"jqfmt",.arg_required = 'f',.values = NULL},
917 {.option_name = NULL}
921 if (!options || !*options)
922 /* use default configuration: create tails, journaling on, no
923 conversion to newest format */
926 for (pos = options; pos;) {
927 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
929 /* wrong option is given */
936 /* "resize=NNN" or "resize=auto" */
938 if (!strcmp(arg, "auto")) {
939 /* From JFS code, to auto-get the size. */
941 s->s_bdev->bd_inode->i_size >> s->
944 *blocks = simple_strtoul(arg, &p, 0);
946 /* NNN does not look like a number */
947 reiserfs_warning(s, "super-6507",
957 unsigned long val = simple_strtoul(arg, &p, 0);
958 /* commit=NNN (time in seconds) */
959 if (*p != '\0' || val >= (unsigned int)-1) {
960 reiserfs_warning(s, "super-6508",
961 "bad value %s for -ocommit\n",
965 *commit_max_age = (unsigned int)val;
969 reiserfs_warning(s, "super-6509", "nolargeio option "
970 "is no longer supported");
975 if (arg && *arg && jdev_name) {
976 if (*jdev_name) { //Hm, already assigned?
977 reiserfs_warning(s, "super-6510",
978 "journal device was "
979 "already specified to "
980 "be %s", *jdev_name);
987 if (c == 'u' || c == 'g') {
988 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
990 if (sb_any_quota_loaded(s) &&
991 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
992 reiserfs_warning(s, "super-6511",
993 "cannot change journaled "
994 "quota options when quota "
998 if (*arg) { /* Some filename specified? */
999 if (REISERFS_SB(s)->s_qf_names[qtype]
1000 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1002 reiserfs_warning(s, "super-6512",
1004 "already specified.",
1008 if (strchr(arg, '/')) {
1009 reiserfs_warning(s, "super-6513",
1010 "quotafile must be "
1011 "on filesystem root.");
1015 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1016 if (!qf_names[qtype]) {
1017 reiserfs_warning(s, "reiserfs-2502",
1018 "not enough memory "
1023 strcpy(qf_names[qtype], arg);
1024 *mount_options |= 1 << REISERFS_QUOTA;
1026 if (qf_names[qtype] !=
1027 REISERFS_SB(s)->s_qf_names[qtype])
1028 kfree(qf_names[qtype]);
1029 qf_names[qtype] = NULL;
1033 if (!strcmp(arg, "vfsold"))
1034 *qfmt = QFMT_VFS_OLD;
1035 else if (!strcmp(arg, "vfsv0"))
1036 *qfmt = QFMT_VFS_V0;
1038 reiserfs_warning(s, "super-6514",
1039 "unknown quota format "
1043 if (sb_any_quota_loaded(s) &&
1044 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1045 reiserfs_warning(s, "super-6515",
1046 "cannot change journaled "
1047 "quota options when quota "
1053 if (c == 'u' || c == 'g' || c == 'f') {
1054 reiserfs_warning(s, "reiserfs-2503", "journaled "
1055 "quota options not supported.");
1062 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1063 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1064 reiserfs_warning(s, "super-6515",
1065 "journaled quota format not specified.");
1068 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1069 if (!(*mount_options & (1 << REISERFS_QUOTA))
1070 && sb_any_quota_loaded(s)) {
1071 reiserfs_warning(s, "super-6516", "quota options must "
1072 "be present when quota is turned on.");
1080 static void switch_data_mode(struct super_block *s, unsigned long mode)
1082 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1083 (1 << REISERFS_DATA_ORDERED) |
1084 (1 << REISERFS_DATA_WRITEBACK));
1085 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1088 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1090 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1091 if (!reiserfs_data_log(s)) {
1092 switch_data_mode(s, REISERFS_DATA_LOG);
1093 reiserfs_info(s, "switching to journaled data mode\n");
1095 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1096 if (!reiserfs_data_ordered(s)) {
1097 switch_data_mode(s, REISERFS_DATA_ORDERED);
1098 reiserfs_info(s, "switching to ordered data mode\n");
1100 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1101 if (!reiserfs_data_writeback(s)) {
1102 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1103 reiserfs_info(s, "switching to writeback data mode\n");
1108 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1110 int flush = (1 << REISERFS_BARRIER_FLUSH);
1111 int none = (1 << REISERFS_BARRIER_NONE);
1112 int all_barrier = flush | none;
1114 if (bits & all_barrier) {
1115 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1117 REISERFS_SB(s)->s_mount_opt |= flush;
1118 printk("reiserfs: enabling write barrier flush mode\n");
1119 } else if (bits & none) {
1120 REISERFS_SB(s)->s_mount_opt |= none;
1121 printk("reiserfs: write barriers turned off\n");
1126 static void handle_attrs(struct super_block *s)
1128 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1130 if (reiserfs_attrs(s)) {
1131 if (old_format_only(s)) {
1132 reiserfs_warning(s, "super-6517", "cannot support "
1133 "attributes on 3.5.x disk format");
1134 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1137 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1138 reiserfs_warning(s, "super-6518", "cannot support "
1139 "attributes until flag is set in "
1141 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1147 static void handle_quota_files(struct super_block *s, char **qf_names,
1152 for (i = 0; i < MAXQUOTAS; i++) {
1153 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1154 kfree(REISERFS_SB(s)->s_qf_names[i]);
1155 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1157 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1161 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1163 struct reiserfs_super_block *rs;
1164 struct reiserfs_transaction_handle th;
1165 unsigned long blocks;
1166 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1167 unsigned long safe_mask = 0;
1168 unsigned int commit_max_age = (unsigned int)-1;
1169 struct reiserfs_journal *journal = SB_JOURNAL(s);
1170 char *new_opts = kstrdup(arg, GFP_KERNEL);
1172 char *qf_names[MAXQUOTAS];
1173 unsigned int qfmt = 0;
1178 reiserfs_write_lock(s);
1181 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1184 rs = SB_DISK_SUPER_BLOCK(s);
1186 if (!reiserfs_parse_options
1187 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1190 for (i = 0; i < MAXQUOTAS; i++)
1191 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1198 handle_quota_files(s, qf_names, &qfmt);
1203 /* Add options that are safe here */
1204 safe_mask |= 1 << REISERFS_SMALLTAIL;
1205 safe_mask |= 1 << REISERFS_LARGETAIL;
1206 safe_mask |= 1 << REISERFS_NO_BORDER;
1207 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1208 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1209 safe_mask |= 1 << REISERFS_TEST4;
1210 safe_mask |= 1 << REISERFS_ATTRS;
1211 safe_mask |= 1 << REISERFS_XATTRS_USER;
1212 safe_mask |= 1 << REISERFS_POSIXACL;
1213 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1214 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1215 safe_mask |= 1 << REISERFS_ERROR_RO;
1216 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1217 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1218 safe_mask |= 1 << REISERFS_QUOTA;
1220 /* Update the bitmask, taking care to keep
1221 * the bits we're not allowed to change here */
1222 REISERFS_SB(s)->s_mount_opt =
1224 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1226 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1227 journal->j_max_commit_age = commit_max_age;
1228 journal->j_max_trans_age = commit_max_age;
1229 } else if (commit_max_age == 0) {
1230 /* 0 means restore defaults. */
1231 journal->j_max_commit_age = journal->j_default_max_commit_age;
1232 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1236 err = reiserfs_resize(s, blocks);
1241 if (*mount_flags & MS_RDONLY) {
1242 reiserfs_xattr_init(s, *mount_flags);
1243 /* remount read-only */
1244 if (s->s_flags & MS_RDONLY)
1245 /* it is read-only already */
1248 err = dquot_suspend(s, -1);
1252 /* try to remount file system with read-only permissions */
1253 if (sb_umount_state(rs) == REISERFS_VALID_FS
1254 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1258 err = journal_begin(&th, s, 10);
1262 /* Mounting a rw partition read-only. */
1263 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1264 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1265 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1267 /* remount read-write */
1268 if (!(s->s_flags & MS_RDONLY)) {
1269 reiserfs_xattr_init(s, *mount_flags);
1270 goto out_ok; /* We are read-write already */
1273 if (reiserfs_is_journal_aborted(journal)) {
1274 err = journal->j_errno;
1278 handle_data_mode(s, mount_options);
1279 handle_barrier_mode(s, mount_options);
1280 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1281 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1282 err = journal_begin(&th, s, 10);
1286 /* Mount a partition which is read-only, read-write */
1287 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1288 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1289 s->s_flags &= ~MS_RDONLY;
1290 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1291 if (!old_format_only(s))
1292 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1293 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1294 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1295 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1297 /* this will force a full flush of all journal lists */
1298 SB_JOURNAL(s)->j_must_wait = 1;
1299 err = journal_end(&th, s, 10);
1304 if (!(*mount_flags & MS_RDONLY)) {
1305 dquot_resume(s, -1);
1306 finish_unfinished(s);
1307 reiserfs_xattr_init(s, *mount_flags);
1311 replace_mount_options(s, new_opts);
1312 reiserfs_write_unlock(s);
1317 reiserfs_write_unlock(s);
1321 static int read_super_block(struct super_block *s, int offset)
1323 struct buffer_head *bh;
1324 struct reiserfs_super_block *rs;
1327 bh = sb_bread(s, offset / s->s_blocksize);
1329 reiserfs_warning(s, "sh-2006",
1330 "bread failed (dev %s, block %lu, size %lu)",
1331 reiserfs_bdevname(s), offset / s->s_blocksize,
1336 rs = (struct reiserfs_super_block *)bh->b_data;
1337 if (!is_any_reiserfs_magic_string(rs)) {
1342 // ok, reiserfs signature (old or new) found in at the given offset
1344 fs_blocksize = sb_blocksize(rs);
1346 sb_set_blocksize(s, fs_blocksize);
1348 bh = sb_bread(s, offset / s->s_blocksize);
1350 reiserfs_warning(s, "sh-2007",
1351 "bread failed (dev %s, block %lu, size %lu)",
1352 reiserfs_bdevname(s), offset / s->s_blocksize,
1357 rs = (struct reiserfs_super_block *)bh->b_data;
1358 if (sb_blocksize(rs) != s->s_blocksize) {
1359 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1360 "filesystem on (dev %s, block %Lu, size %lu)",
1361 reiserfs_bdevname(s),
1362 (unsigned long long)bh->b_blocknr,
1368 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1370 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1371 "--rebuild-tree run detected. Please run\n"
1372 "reiserfsck --rebuild-tree and wait for a "
1373 "completion. If that fails\n"
1374 "get newer reiserfsprogs package");
1378 SB_BUFFER_WITH_SB(s) = bh;
1379 SB_DISK_SUPER_BLOCK(s) = rs;
1381 if (is_reiserfs_jr(rs)) {
1382 /* magic is of non-standard journal filesystem, look at s_version to
1383 find which format is in use */
1384 if (sb_version(rs) == REISERFS_VERSION_2)
1385 reiserfs_info(s, "found reiserfs format \"3.6\""
1386 " with non-standard journal\n");
1387 else if (sb_version(rs) == REISERFS_VERSION_1)
1388 reiserfs_info(s, "found reiserfs format \"3.5\""
1389 " with non-standard journal\n");
1391 reiserfs_warning(s, "sh-2012", "found unknown "
1392 "format \"%u\" of reiserfs with "
1393 "non-standard magic", sb_version(rs));
1397 /* s_version of standard format may contain incorrect information,
1398 so we just look at the magic string */
1400 "found reiserfs format \"%s\" with standard journal\n",
1401 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1403 s->s_op = &reiserfs_sops;
1404 s->s_export_op = &reiserfs_export_ops;
1406 s->s_qcop = &reiserfs_qctl_operations;
1407 s->dq_op = &reiserfs_quota_operations;
1410 /* new format is limited by the 32 bit wide i_blocks field, want to
1411 ** be one full block below that.
1413 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1417 /* after journal replay, reread all bitmap and super blocks */
1418 static int reread_meta_blocks(struct super_block *s)
1420 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1421 reiserfs_write_unlock(s);
1422 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1423 reiserfs_write_lock(s);
1424 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1425 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1432 /////////////////////////////////////////////////////
1433 // hash detection stuff
1435 // if root directory is empty - we set default - Yura's - hash and
1437 // FIXME: we look for only one name in a directory. If tea and yura
1438 // bith have the same value - we ask user to send report to the
1440 static __u32 find_hash_out(struct super_block *s)
1443 struct inode *inode;
1445 INITIALIZE_PATH(path);
1446 struct reiserfs_dir_entry de;
1447 __u32 hash = DEFAULT_HASH;
1449 inode = s->s_root->d_inode;
1451 do { // Some serious "goto"-hater was there ;)
1452 u32 teahash, r5hash, yurahash;
1454 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1455 retval = search_by_entry_key(s, &key, &path, &de);
1456 if (retval == IO_ERROR) {
1460 if (retval == NAME_NOT_FOUND)
1462 set_de_name_and_namelen(&de);
1463 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1464 /* allow override in this case */
1465 if (reiserfs_rupasov_hash(s)) {
1468 reiserfs_info(s, "FS seems to be empty, autodetect "
1469 "is using the default hash\n");
1472 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1473 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1474 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1475 if (((teahash == r5hash)
1477 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1478 == r5hash)) || ((teahash == yurahash)
1480 GET_HASH_VALUE(deh_offset
1485 || ((r5hash == yurahash)
1487 GET_HASH_VALUE(deh_offset
1488 (&(de.de_deh[de.de_entry_num])))))) {
1489 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1490 "automatically detect hash function. "
1491 "Please mount with -o "
1492 "hash={tea,rupasov,r5}");
1496 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1499 else if (GET_HASH_VALUE
1500 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1502 else if (GET_HASH_VALUE
1503 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1506 reiserfs_warning(s, "reiserfs-2506",
1507 "Unrecognised hash function");
1516 // finds out which hash names are sorted with
1517 static int what_hash(struct super_block *s)
1521 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1523 /* reiserfs_hash_detect() == true if any of the hash mount options
1524 ** were used. We must check them to make sure the user isn't
1525 ** using a bad hash value
1527 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1528 code = find_hash_out(s);
1530 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1531 /* detection has found the hash, and we must check against the
1534 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1535 reiserfs_warning(s, "reiserfs-2507",
1536 "Error, %s hash detected, "
1537 "unable to force rupasov hash",
1538 reiserfs_hashname(code));
1540 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1541 reiserfs_warning(s, "reiserfs-2508",
1542 "Error, %s hash detected, "
1543 "unable to force tea hash",
1544 reiserfs_hashname(code));
1546 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1547 reiserfs_warning(s, "reiserfs-2509",
1548 "Error, %s hash detected, "
1549 "unable to force r5 hash",
1550 reiserfs_hashname(code));
1554 /* find_hash_out was not called or could not determine the hash */
1555 if (reiserfs_rupasov_hash(s)) {
1557 } else if (reiserfs_tea_hash(s)) {
1559 } else if (reiserfs_r5_hash(s)) {
1564 /* if we are mounted RW, and we have a new valid hash code, update
1567 if (code != UNSET_HASH &&
1568 !(s->s_flags & MS_RDONLY) &&
1569 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1570 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1575 // return pointer to appropriate function
1576 static hashf_t hash_function(struct super_block *s)
1578 switch (what_hash(s)) {
1580 reiserfs_info(s, "Using tea hash to sort names\n");
1583 reiserfs_info(s, "Using rupasov hash to sort names\n");
1586 reiserfs_info(s, "Using r5 hash to sort names\n");
1592 // this is used to set up correct value for old partitions
1593 static int function2code(hashf_t func)
1595 if (func == keyed_hash)
1597 if (func == yura_hash)
1599 if (func == r5_hash)
1602 BUG(); // should never happen
1607 #define SWARN(silent, s, id, ...) \
1609 reiserfs_warning(s, id, __VA_ARGS__)
1611 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1613 struct inode *root_inode;
1614 struct reiserfs_transaction_handle th;
1616 unsigned long blocks;
1617 unsigned int commit_max_age = 0;
1619 struct reiserfs_iget_args args;
1620 struct reiserfs_super_block *rs;
1622 struct reiserfs_sb_info *sbi;
1623 int errval = -EINVAL;
1624 char *qf_names[MAXQUOTAS] = {};
1625 unsigned int qfmt = 0;
1627 save_mount_options(s, data);
1629 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1633 /* Set default values for options: non-aggressive tails, RO on errors */
1634 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1635 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1636 /* no preallocation minimum, be smart in
1637 reiserfs_file_write instead */
1638 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1639 /* Preallocate by 16 blocks (17-1) at once */
1640 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1641 /* setup default block allocator options */
1642 reiserfs_init_alloc_options(s);
1644 mutex_init(&REISERFS_SB(s)->lock);
1645 REISERFS_SB(s)->lock_depth = -1;
1648 * This function is called with the bkl, which also was the old
1649 * locking used here.
1650 * do_journal_begin() will soon check if we hold the lock (ie: was the
1651 * bkl). This is likely because do_journal_begin() has several another
1652 * callers because at this time, it doesn't seem to be necessary to
1653 * protect against anything.
1654 * Anyway, let's be conservative and lock for now.
1656 reiserfs_write_lock(s);
1659 if (reiserfs_parse_options
1660 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1661 &commit_max_age, qf_names, &qfmt) == 0) {
1665 handle_quota_files(s, qf_names, &qfmt);
1669 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1673 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1674 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1676 /* try new format (64-th 1k block), which can contain reiserfs super block */
1677 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1678 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1679 reiserfs_bdevname(s));
1683 rs = SB_DISK_SUPER_BLOCK(s);
1684 /* Let's do basic sanity check to verify that underlying device is not
1685 smaller than the filesystem. If the check fails then abort and scream,
1686 because bad stuff will happen otherwise. */
1687 if (s->s_bdev && s->s_bdev->bd_inode
1688 && i_size_read(s->s_bdev->bd_inode) <
1689 sb_block_count(rs) * sb_blocksize(rs)) {
1690 SWARN(silent, s, "", "Filesystem cannot be "
1691 "mounted because it is bigger than the device");
1692 SWARN(silent, s, "", "You may need to run fsck "
1693 "or increase size of your LVM partition");
1694 SWARN(silent, s, "", "Or may be you forgot to "
1695 "reboot after fdisk when it told you to");
1699 sbi->s_mount_state = SB_REISERFS_STATE(s);
1700 sbi->s_mount_state = REISERFS_VALID_FS;
1702 if ((errval = reiserfs_init_bitmap_cache(s))) {
1703 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1707 #ifdef CONFIG_REISERFS_CHECK
1708 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1709 SWARN(silent, s, "", "- it is slow mode for debugging.");
1712 /* make data=ordered the default */
1713 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1714 !reiserfs_data_writeback(s)) {
1715 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1718 if (reiserfs_data_log(s)) {
1719 reiserfs_info(s, "using journaled data mode\n");
1720 } else if (reiserfs_data_ordered(s)) {
1721 reiserfs_info(s, "using ordered data mode\n");
1723 reiserfs_info(s, "using writeback data mode\n");
1725 if (reiserfs_barrier_flush(s)) {
1726 printk("reiserfs: using flush barriers\n");
1728 // set_device_ro(s->s_dev, 1) ;
1729 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1730 SWARN(silent, s, "sh-2022",
1731 "unable to initialize journal space");
1734 jinit_done = 1; /* once this is set, journal_release must be called
1735 ** if we error out of the mount
1738 if (reread_meta_blocks(s)) {
1739 SWARN(silent, s, "jmacd-9",
1740 "unable to reread meta blocks after journal init");
1747 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1748 SWARN(silent, s, "clm-7000",
1749 "Detected readonly device, marking FS readonly");
1750 s->s_flags |= MS_RDONLY;
1752 args.objectid = REISERFS_ROOT_OBJECTID;
1753 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1755 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1756 reiserfs_init_locked_inode, (void *)(&args));
1758 SWARN(silent, s, "jmacd-10", "get root inode failed");
1762 if (root_inode->i_state & I_NEW) {
1763 reiserfs_read_locked_inode(root_inode, &args);
1764 unlock_new_inode(root_inode);
1767 s->s_root = d_alloc_root(root_inode);
1772 // define and initialize hash function
1773 sbi->s_hash_function = hash_function(s);
1774 if (sbi->s_hash_function == NULL) {
1780 if (is_reiserfs_3_5(rs)
1781 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1782 set_bit(REISERFS_3_5, &(sbi->s_properties));
1783 else if (old_format)
1784 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1786 set_bit(REISERFS_3_6, &(sbi->s_properties));
1788 if (!(s->s_flags & MS_RDONLY)) {
1790 errval = journal_begin(&th, s, 1);
1796 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1798 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1799 set_sb_fs_state(rs, 0);
1801 /* Clear out s_bmap_nr if it would wrap. We can handle this
1802 * case, but older revisions can't. This will cause the
1803 * file system to fail mount on those older implementations,
1804 * avoiding corruption. -jeffm */
1805 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1806 sb_bmap_nr(rs) != 0) {
1807 reiserfs_warning(s, "super-2030", "This file system "
1808 "claims to use %u bitmap blocks in "
1809 "its super block, but requires %u. "
1810 "Clearing to zero.", sb_bmap_nr(rs),
1811 reiserfs_bmap_count(s));
1813 set_sb_bmap_nr(rs, 0);
1816 if (old_format_only(s)) {
1817 /* filesystem of format 3.5 either with standard or non-standard
1819 if (convert_reiserfs(s)) {
1820 /* and -o conv is given */
1823 "converting 3.5 filesystem to the 3.6 format");
1825 if (is_reiserfs_3_5(rs))
1826 /* put magic string of 3.6 format. 2.2 will not be able to
1827 mount this filesystem anymore */
1828 memcpy(rs->s_v1.s_magic,
1829 reiserfs_3_6_magic_string,
1831 (reiserfs_3_6_magic_string));
1833 set_sb_version(rs, REISERFS_VERSION_2);
1834 reiserfs_convert_objectid_map_v1(s);
1835 set_bit(REISERFS_3_6, &(sbi->s_properties));
1836 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1837 } else if (!silent) {
1838 reiserfs_info(s, "using 3.5.x disk format\n");
1841 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1844 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1845 errval = journal_end(&th, s, 1);
1852 if ((errval = reiserfs_lookup_privroot(s)) ||
1853 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1859 /* look for files which were to be removed in previous session */
1860 finish_unfinished(s);
1862 if (old_format_only(s) && !silent) {
1863 reiserfs_info(s, "using 3.5.x disk format\n");
1866 if ((errval = reiserfs_lookup_privroot(s)) ||
1867 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1873 // mark hash in super block: it could be unset. overwrite should be ok
1874 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1878 reiserfs_proc_info_init(s);
1880 init_waitqueue_head(&(sbi->s_wait));
1881 spin_lock_init(&sbi->bitmap_lock);
1883 reiserfs_write_unlock(s);
1888 if (jinit_done) { /* kill the commit thread, free journal ram */
1889 journal_release_error(NULL, s);
1892 reiserfs_write_unlock(s);
1894 reiserfs_free_bitmap_cache(s);
1895 if (SB_BUFFER_WITH_SB(s))
1896 brelse(SB_BUFFER_WITH_SB(s));
1900 for (j = 0; j < MAXQUOTAS; j++)
1906 s->s_fs_info = NULL;
1910 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1912 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1914 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1915 buf->f_bfree = sb_free_blocks(rs);
1916 buf->f_bavail = buf->f_bfree;
1917 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1918 buf->f_bsize = dentry->d_sb->s_blocksize;
1919 /* changed to accommodate gcc folks. */
1920 buf->f_type = REISERFS_SUPER_MAGIC;
1921 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1922 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1923 sizeof(rs->s_uuid)/2);
1929 static int reiserfs_write_dquot(struct dquot *dquot)
1931 struct reiserfs_transaction_handle th;
1934 reiserfs_write_lock(dquot->dq_sb);
1936 journal_begin(&th, dquot->dq_sb,
1937 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1940 ret = dquot_commit(dquot);
1942 journal_end(&th, dquot->dq_sb,
1943 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1947 reiserfs_write_unlock(dquot->dq_sb);
1951 static int reiserfs_acquire_dquot(struct dquot *dquot)
1953 struct reiserfs_transaction_handle th;
1956 reiserfs_write_lock(dquot->dq_sb);
1958 journal_begin(&th, dquot->dq_sb,
1959 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1962 ret = dquot_acquire(dquot);
1964 journal_end(&th, dquot->dq_sb,
1965 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1969 reiserfs_write_unlock(dquot->dq_sb);
1973 static int reiserfs_release_dquot(struct dquot *dquot)
1975 struct reiserfs_transaction_handle th;
1978 reiserfs_write_lock(dquot->dq_sb);
1980 journal_begin(&th, dquot->dq_sb,
1981 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1983 /* Release dquot anyway to avoid endless cycle in dqput() */
1984 dquot_release(dquot);
1987 ret = dquot_release(dquot);
1989 journal_end(&th, dquot->dq_sb,
1990 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1994 reiserfs_write_unlock(dquot->dq_sb);
1998 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2000 /* Are we journaling quotas? */
2001 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2002 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2003 dquot_mark_dquot_dirty(dquot);
2004 return reiserfs_write_dquot(dquot);
2006 return dquot_mark_dquot_dirty(dquot);
2009 static int reiserfs_write_info(struct super_block *sb, int type)
2011 struct reiserfs_transaction_handle th;
2014 /* Data block + inode block */
2015 reiserfs_write_lock(sb);
2016 ret = journal_begin(&th, sb, 2);
2019 ret = dquot_commit_info(sb, type);
2020 err = journal_end(&th, sb, 2);
2024 reiserfs_write_unlock(sb);
2029 * Turn on quotas during mount time - we need to find the quota file and such...
2031 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2033 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2034 REISERFS_SB(sb)->s_jquota_fmt, type);
2038 * Standard function to be called on quota_on
2040 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2045 struct inode *inode;
2046 struct reiserfs_transaction_handle th;
2048 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2051 err = kern_path(name, LOOKUP_FOLLOW, &path);
2054 /* Quotafile not on the same filesystem? */
2055 if (path.mnt->mnt_sb != sb) {
2059 inode = path.dentry->d_inode;
2060 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2061 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2062 err = reiserfs_unpack(inode, NULL);
2064 reiserfs_warning(sb, "super-6520",
2065 "Unpacking tail of quota file failed"
2066 " (%d). Cannot turn on quotas.", err);
2070 mark_inode_dirty(inode);
2072 /* Journaling quota? */
2073 if (REISERFS_SB(sb)->s_qf_names[type]) {
2074 /* Quotafile not of fs root? */
2075 if (path.dentry->d_parent != sb->s_root)
2076 reiserfs_warning(sb, "super-6521",
2077 "Quota file not on filesystem root. "
2078 "Journalled quota will not work.");
2082 * When we journal data on quota file, we have to flush journal to see
2083 * all updates to the file when we bypass pagecache...
2085 if (reiserfs_file_data_log(inode)) {
2086 /* Just start temporary transaction and finish it */
2087 err = journal_begin(&th, sb, 1);
2090 err = journal_end_sync(&th, sb, 1);
2094 err = dquot_quota_on_path(sb, type, format_id, &path);
2100 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2101 * acquiring the locks... As quota files are never truncated and quota code
2102 * itself serializes the operations (and noone else should touch the files)
2103 * we don't have to be afraid of races */
2104 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2105 size_t len, loff_t off)
2107 struct inode *inode = sb_dqopt(sb)->files[type];
2108 unsigned long blk = off >> sb->s_blocksize_bits;
2109 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2111 struct buffer_head tmp_bh, *bh;
2112 loff_t i_size = i_size_read(inode);
2116 if (off + len > i_size)
2119 while (toread > 0) {
2121 sb->s_blocksize - offset <
2122 toread ? sb->s_blocksize - offset : toread;
2124 /* Quota files are without tails so we can safely use this function */
2125 reiserfs_write_lock(sb);
2126 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2127 reiserfs_write_unlock(sb);
2130 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2131 memset(data, 0, tocopy);
2133 bh = sb_bread(sb, tmp_bh.b_blocknr);
2136 memcpy(data, bh->b_data + offset, tocopy);
2147 /* Write to quotafile (we know the transaction is already started and has
2148 * enough credits) */
2149 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2150 const char *data, size_t len, loff_t off)
2152 struct inode *inode = sb_dqopt(sb)->files[type];
2153 unsigned long blk = off >> sb->s_blocksize_bits;
2154 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2155 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2156 size_t towrite = len;
2157 struct buffer_head tmp_bh, *bh;
2159 if (!current->journal_info) {
2160 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2161 " cancelled because transaction is not started.\n",
2162 (unsigned long long)off, (unsigned long long)len);
2165 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2166 while (towrite > 0) {
2167 tocopy = sb->s_blocksize - offset < towrite ?
2168 sb->s_blocksize - offset : towrite;
2170 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2173 if (offset || tocopy != sb->s_blocksize)
2174 bh = sb_bread(sb, tmp_bh.b_blocknr);
2176 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2182 memcpy(bh->b_data + offset, data, tocopy);
2183 flush_dcache_page(bh->b_page);
2184 set_buffer_uptodate(bh);
2186 reiserfs_prepare_for_journal(sb, bh, 1);
2187 journal_mark_dirty(current->journal_info, sb, bh);
2189 reiserfs_add_ordered_list(inode, bh);
2197 if (len == towrite) {
2198 mutex_unlock(&inode->i_mutex);
2201 if (inode->i_size < off + len - towrite)
2202 i_size_write(inode, off + len - towrite);
2204 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2205 mark_inode_dirty(inode);
2206 mutex_unlock(&inode->i_mutex);
2207 return len - towrite;
2212 static int get_super_block(struct file_system_type *fs_type,
2213 int flags, const char *dev_name,
2214 void *data, struct vfsmount *mnt)
2216 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2220 static int __init init_reiserfs_fs(void)
2224 if ((ret = init_inodecache())) {
2228 reiserfs_proc_info_global_init();
2230 ret = register_filesystem(&reiserfs_fs_type);
2236 reiserfs_proc_info_global_done();
2237 destroy_inodecache();
2242 static void __exit exit_reiserfs_fs(void)
2244 reiserfs_proc_info_global_done();
2245 unregister_filesystem(&reiserfs_fs_type);
2246 destroy_inodecache();
2249 struct file_system_type reiserfs_fs_type = {
2250 .owner = THIS_MODULE,
2252 .get_sb = get_super_block,
2253 .kill_sb = reiserfs_kill_sb,
2254 .fs_flags = FS_REQUIRES_DEV,
2257 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2258 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2259 MODULE_LICENSE("GPL");
2261 module_init(init_reiserfs_fs);
2262 module_exit(exit_reiserfs_fs);