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);
249 dquot_initialize(inode);
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;
468 reiserfs_write_lock(s);
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);
502 reiserfs_write_unlock(s);
503 mutex_destroy(&REISERFS_SB(s)->lock);
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;
559 if (inode->i_sb->s_flags & MS_RDONLY) {
560 reiserfs_warning(inode->i_sb, "clm-6006",
561 "writing inode %lu on readonly FS",
565 lock_depth = reiserfs_write_lock_once(inode->i_sb);
567 /* this is really only used for atime updates, so they don't have
568 ** to be included in O_SYNC or fsync
570 err = journal_begin(&th, inode->i_sb, 1);
574 reiserfs_update_sd(&th, inode);
575 journal_end(&th, inode->i_sb, 1);
578 reiserfs_write_unlock_once(inode->i_sb, lock_depth);
581 static void reiserfs_clear_inode(struct inode *inode)
587 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
589 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
593 static const struct super_operations reiserfs_sops = {
594 .alloc_inode = reiserfs_alloc_inode,
595 .destroy_inode = reiserfs_destroy_inode,
596 .write_inode = reiserfs_write_inode,
597 .dirty_inode = reiserfs_dirty_inode,
598 .clear_inode = reiserfs_clear_inode,
599 .delete_inode = reiserfs_delete_inode,
600 .put_super = reiserfs_put_super,
601 .write_super = reiserfs_write_super,
602 .sync_fs = reiserfs_sync_fs,
603 .freeze_fs = reiserfs_freeze,
604 .unfreeze_fs = reiserfs_unfreeze,
605 .statfs = reiserfs_statfs,
606 .remount_fs = reiserfs_remount,
607 .show_options = generic_show_options,
609 .quota_read = reiserfs_quota_read,
610 .quota_write = reiserfs_quota_write,
615 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
617 static int reiserfs_write_dquot(struct dquot *);
618 static int reiserfs_acquire_dquot(struct dquot *);
619 static int reiserfs_release_dquot(struct dquot *);
620 static int reiserfs_mark_dquot_dirty(struct dquot *);
621 static int reiserfs_write_info(struct super_block *, int);
622 static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
624 static const struct dquot_operations reiserfs_quota_operations = {
625 .write_dquot = reiserfs_write_dquot,
626 .acquire_dquot = reiserfs_acquire_dquot,
627 .release_dquot = reiserfs_release_dquot,
628 .mark_dirty = reiserfs_mark_dquot_dirty,
629 .write_info = reiserfs_write_info,
630 .alloc_dquot = dquot_alloc,
631 .destroy_dquot = dquot_destroy,
634 static const struct quotactl_ops reiserfs_qctl_operations = {
635 .quota_on = reiserfs_quota_on,
636 .quota_off = vfs_quota_off,
637 .quota_sync = vfs_quota_sync,
638 .get_info = vfs_get_dqinfo,
639 .set_info = vfs_set_dqinfo,
640 .get_dqblk = vfs_get_dqblk,
641 .set_dqblk = vfs_set_dqblk,
645 static const struct export_operations reiserfs_export_ops = {
646 .encode_fh = reiserfs_encode_fh,
647 .fh_to_dentry = reiserfs_fh_to_dentry,
648 .fh_to_parent = reiserfs_fh_to_parent,
649 .get_parent = reiserfs_get_parent,
652 /* this struct is used in reiserfs_getopt () for containing the value for those
653 mount options that have values rather than being toggles. */
656 int setmask; /* bitmask which is to set on mount_options bitmask when this
657 value is found, 0 is no bits are to be changed. */
658 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
659 value is found, 0 is no bits are to be changed. This is
660 applied BEFORE setmask */
663 /* Set this bit in arg_required to allow empty arguments */
664 #define REISERFS_OPT_ALLOWEMPTY 31
666 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
670 int arg_required; /* 0 if argument is not required, not 0 otherwise */
671 const arg_desc_t *values; /* list of values accepted by an option */
672 int setmask; /* bitmask which is to set on mount_options bitmask when this
673 value is found, 0 is no bits are to be changed. */
674 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
675 value is found, 0 is no bits are to be changed. This is
676 applied BEFORE setmask */
679 /* possible values for -o data= */
680 static const arg_desc_t logging_mode[] = {
681 {"ordered", 1 << REISERFS_DATA_ORDERED,
682 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
683 {"journal", 1 << REISERFS_DATA_LOG,
684 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
685 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
686 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
690 /* possible values for -o barrier= */
691 static const arg_desc_t barrier_mode[] = {
692 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
693 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
697 /* possible values for "-o block-allocator=" and bits which are to be set in
698 s_mount_opt of reiserfs specific part of in-core super block */
699 static const arg_desc_t balloc[] = {
700 {"noborder", 1 << REISERFS_NO_BORDER, 0},
701 {"border", 0, 1 << REISERFS_NO_BORDER},
702 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
703 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
704 {"test4", 1 << REISERFS_TEST4, 0},
705 {"notest4", 0, 1 << REISERFS_TEST4},
709 static const arg_desc_t tails[] = {
710 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
711 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
712 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
716 static const arg_desc_t error_actions[] = {
717 {"panic", 1 << REISERFS_ERROR_PANIC,
718 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
719 {"ro-remount", 1 << REISERFS_ERROR_RO,
720 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
721 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
722 {"continue", 1 << REISERFS_ERROR_CONTINUE,
723 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
728 /* proceed only one option from a list *cur - string containing of mount options
729 opts - array of options which are accepted
730 opt_arg - if option is found and requires an argument and if it is specifed
731 in the input - pointer to the argument is stored here
732 bit_flags - if option requires to set a certain bit - it is set here
733 return -1 if unknown option is found, opt->arg_required otherwise */
734 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
735 char **opt_arg, unsigned long *bit_flags)
744 const opt_desc_t *opt;
745 const arg_desc_t *arg;
749 /* assume argument cannot contain commas */
750 *cur = strchr(p, ',');
756 if (!strncmp(p, "alloc=", 6)) {
757 /* Ugly special case, probably we should redo options parser so that
758 it can understand several arguments for some options, also so that
759 it can fill several bitfields with option values. */
760 if (reiserfs_parse_alloc_options(s, p + 6)) {
767 /* for every option in the list */
768 for (opt = opts; opt->option_name; opt++) {
769 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
772 (1 << REISERFS_UNSUPPORTED_OPT))
773 reiserfs_warning(s, "super-6500",
774 "%s not supported.\n",
777 *bit_flags &= ~opt->clrmask;
779 (1 << REISERFS_UNSUPPORTED_OPT))
780 reiserfs_warning(s, "super-6501",
781 "%s not supported.\n",
784 *bit_flags |= opt->setmask;
789 if (!opt->option_name) {
790 reiserfs_warning(s, "super-6502",
791 "unknown mount option \"%s\"", p);
795 p += strlen(opt->option_name);
798 if (!opt->arg_required) {
799 reiserfs_warning(s, "super-6503",
800 "the option \"%s\" does not "
801 "require an argument\n",
808 if (opt->arg_required) {
809 reiserfs_warning(s, "super-6504",
810 "the option \"%s\" requires an "
811 "argument\n", opt->option_name);
816 reiserfs_warning(s, "super-6505",
817 "head of option \"%s\" is only correct\n",
822 /* move to the argument, or to next option if argument is not required */
825 if (opt->arg_required
826 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
828 /* this catches "option=," if not allowed */
829 reiserfs_warning(s, "super-6506",
830 "empty argument for \"%s\"\n",
836 /* *=NULLopt_arg contains pointer to argument */
838 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
841 /* values possible for this option are listed in opt->values */
842 for (arg = opt->values; arg->value; arg++) {
843 if (!strcmp(p, arg->value)) {
845 *bit_flags &= ~arg->clrmask;
846 *bit_flags |= arg->setmask;
848 return opt->arg_required;
852 reiserfs_warning(s, "super-6506",
853 "bad value \"%s\" for option \"%s\"\n", p,
858 /* returns 0 if something is wrong in option string, 1 - otherwise */
859 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
860 unsigned long *mount_options,
861 /* after the parsing phase, contains the
862 collection of bitflags defining what
863 mount options were selected. */
864 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
866 unsigned int *commit_max_age,
873 opt_desc_t opts[] = {
874 /* Compatibility stuff, so that -o notail for old setups still work */
875 {"tails",.arg_required = 't',.values = tails},
877 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
878 {"conv",.setmask = 1 << REISERFS_CONVERT},
879 {"attrs",.setmask = 1 << REISERFS_ATTRS},
880 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
881 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
882 #ifdef CONFIG_REISERFS_FS_XATTR
883 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
884 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
886 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
887 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
889 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
890 {"acl",.setmask = 1 << REISERFS_POSIXACL},
891 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
893 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
894 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
896 {.option_name = "nolog"},
897 {"replayonly",.setmask = 1 << REPLAYONLY},
898 {"block-allocator",.arg_required = 'a',.values = balloc},
899 {"data",.arg_required = 'd',.values = logging_mode},
900 {"barrier",.arg_required = 'b',.values = barrier_mode},
901 {"resize",.arg_required = 'r',.values = NULL},
902 {"jdev",.arg_required = 'j',.values = NULL},
903 {"nolargeio",.arg_required = 'w',.values = NULL},
904 {"commit",.arg_required = 'c',.values = NULL},
905 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
906 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
907 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
908 {"errors",.arg_required = 'e',.values = error_actions},
909 {"usrjquota",.arg_required =
910 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
911 {"grpjquota",.arg_required =
912 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
913 {"jqfmt",.arg_required = 'f',.values = NULL},
914 {.option_name = NULL}
918 if (!options || !*options)
919 /* use default configuration: create tails, journaling on, no
920 conversion to newest format */
923 for (pos = options; pos;) {
924 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
926 /* wrong option is given */
933 /* "resize=NNN" or "resize=auto" */
935 if (!strcmp(arg, "auto")) {
936 /* From JFS code, to auto-get the size. */
938 s->s_bdev->bd_inode->i_size >> s->
941 *blocks = simple_strtoul(arg, &p, 0);
943 /* NNN does not look like a number */
944 reiserfs_warning(s, "super-6507",
954 unsigned long val = simple_strtoul(arg, &p, 0);
955 /* commit=NNN (time in seconds) */
956 if (*p != '\0' || val >= (unsigned int)-1) {
957 reiserfs_warning(s, "super-6508",
958 "bad value %s for -ocommit\n",
962 *commit_max_age = (unsigned int)val;
966 reiserfs_warning(s, "super-6509", "nolargeio option "
967 "is no longer supported");
972 if (arg && *arg && jdev_name) {
973 if (*jdev_name) { //Hm, already assigned?
974 reiserfs_warning(s, "super-6510",
975 "journal device was "
976 "already specified to "
977 "be %s", *jdev_name);
984 if (c == 'u' || c == 'g') {
985 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
987 if (sb_any_quota_loaded(s) &&
988 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
989 reiserfs_warning(s, "super-6511",
990 "cannot change journaled "
991 "quota options when quota "
995 if (*arg) { /* Some filename specified? */
996 if (REISERFS_SB(s)->s_qf_names[qtype]
997 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
999 reiserfs_warning(s, "super-6512",
1001 "already specified.",
1005 if (strchr(arg, '/')) {
1006 reiserfs_warning(s, "super-6513",
1007 "quotafile must be "
1008 "on filesystem root.");
1012 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1013 if (!qf_names[qtype]) {
1014 reiserfs_warning(s, "reiserfs-2502",
1015 "not enough memory "
1020 strcpy(qf_names[qtype], arg);
1021 *mount_options |= 1 << REISERFS_QUOTA;
1023 if (qf_names[qtype] !=
1024 REISERFS_SB(s)->s_qf_names[qtype])
1025 kfree(qf_names[qtype]);
1026 qf_names[qtype] = NULL;
1030 if (!strcmp(arg, "vfsold"))
1031 *qfmt = QFMT_VFS_OLD;
1032 else if (!strcmp(arg, "vfsv0"))
1033 *qfmt = QFMT_VFS_V0;
1035 reiserfs_warning(s, "super-6514",
1036 "unknown quota format "
1040 if (sb_any_quota_loaded(s) &&
1041 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1042 reiserfs_warning(s, "super-6515",
1043 "cannot change journaled "
1044 "quota options when quota "
1050 if (c == 'u' || c == 'g' || c == 'f') {
1051 reiserfs_warning(s, "reiserfs-2503", "journaled "
1052 "quota options not supported.");
1059 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1060 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1061 reiserfs_warning(s, "super-6515",
1062 "journaled quota format not specified.");
1065 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1066 if (!(*mount_options & (1 << REISERFS_QUOTA))
1067 && sb_any_quota_loaded(s)) {
1068 reiserfs_warning(s, "super-6516", "quota options must "
1069 "be present when quota is turned on.");
1077 static void switch_data_mode(struct super_block *s, unsigned long mode)
1079 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1080 (1 << REISERFS_DATA_ORDERED) |
1081 (1 << REISERFS_DATA_WRITEBACK));
1082 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1085 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1087 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1088 if (!reiserfs_data_log(s)) {
1089 switch_data_mode(s, REISERFS_DATA_LOG);
1090 reiserfs_info(s, "switching to journaled data mode\n");
1092 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1093 if (!reiserfs_data_ordered(s)) {
1094 switch_data_mode(s, REISERFS_DATA_ORDERED);
1095 reiserfs_info(s, "switching to ordered data mode\n");
1097 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1098 if (!reiserfs_data_writeback(s)) {
1099 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1100 reiserfs_info(s, "switching to writeback data mode\n");
1105 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1107 int flush = (1 << REISERFS_BARRIER_FLUSH);
1108 int none = (1 << REISERFS_BARRIER_NONE);
1109 int all_barrier = flush | none;
1111 if (bits & all_barrier) {
1112 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1114 REISERFS_SB(s)->s_mount_opt |= flush;
1115 printk("reiserfs: enabling write barrier flush mode\n");
1116 } else if (bits & none) {
1117 REISERFS_SB(s)->s_mount_opt |= none;
1118 printk("reiserfs: write barriers turned off\n");
1123 static void handle_attrs(struct super_block *s)
1125 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1127 if (reiserfs_attrs(s)) {
1128 if (old_format_only(s)) {
1129 reiserfs_warning(s, "super-6517", "cannot support "
1130 "attributes on 3.5.x disk format");
1131 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1134 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1135 reiserfs_warning(s, "super-6518", "cannot support "
1136 "attributes until flag is set in "
1138 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1144 static void handle_quota_files(struct super_block *s, char **qf_names,
1149 for (i = 0; i < MAXQUOTAS; i++) {
1150 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1151 kfree(REISERFS_SB(s)->s_qf_names[i]);
1152 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1154 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1158 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1160 struct reiserfs_super_block *rs;
1161 struct reiserfs_transaction_handle th;
1162 unsigned long blocks;
1163 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1164 unsigned long safe_mask = 0;
1165 unsigned int commit_max_age = (unsigned int)-1;
1166 struct reiserfs_journal *journal = SB_JOURNAL(s);
1167 char *new_opts = kstrdup(arg, GFP_KERNEL);
1169 char *qf_names[MAXQUOTAS];
1170 unsigned int qfmt = 0;
1175 reiserfs_write_lock(s);
1178 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1181 rs = SB_DISK_SUPER_BLOCK(s);
1183 if (!reiserfs_parse_options
1184 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1187 for (i = 0; i < MAXQUOTAS; i++)
1188 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1195 handle_quota_files(s, qf_names, &qfmt);
1200 /* Add options that are safe here */
1201 safe_mask |= 1 << REISERFS_SMALLTAIL;
1202 safe_mask |= 1 << REISERFS_LARGETAIL;
1203 safe_mask |= 1 << REISERFS_NO_BORDER;
1204 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1205 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1206 safe_mask |= 1 << REISERFS_TEST4;
1207 safe_mask |= 1 << REISERFS_ATTRS;
1208 safe_mask |= 1 << REISERFS_XATTRS_USER;
1209 safe_mask |= 1 << REISERFS_POSIXACL;
1210 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1211 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1212 safe_mask |= 1 << REISERFS_ERROR_RO;
1213 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1214 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1215 safe_mask |= 1 << REISERFS_QUOTA;
1217 /* Update the bitmask, taking care to keep
1218 * the bits we're not allowed to change here */
1219 REISERFS_SB(s)->s_mount_opt =
1221 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1223 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1224 journal->j_max_commit_age = commit_max_age;
1225 journal->j_max_trans_age = commit_max_age;
1226 } else if (commit_max_age == 0) {
1227 /* 0 means restore defaults. */
1228 journal->j_max_commit_age = journal->j_default_max_commit_age;
1229 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1233 err = reiserfs_resize(s, blocks);
1238 if (*mount_flags & MS_RDONLY) {
1239 reiserfs_xattr_init(s, *mount_flags);
1240 /* remount read-only */
1241 if (s->s_flags & MS_RDONLY)
1242 /* it is read-only already */
1244 /* try to remount file system with read-only permissions */
1245 if (sb_umount_state(rs) == REISERFS_VALID_FS
1246 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1250 err = journal_begin(&th, s, 10);
1254 /* Mounting a rw partition read-only. */
1255 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1256 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1257 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1259 /* remount read-write */
1260 if (!(s->s_flags & MS_RDONLY)) {
1261 reiserfs_xattr_init(s, *mount_flags);
1262 goto out_ok; /* We are read-write already */
1265 if (reiserfs_is_journal_aborted(journal)) {
1266 err = journal->j_errno;
1270 handle_data_mode(s, mount_options);
1271 handle_barrier_mode(s, mount_options);
1272 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1273 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1274 err = journal_begin(&th, s, 10);
1278 /* Mount a partition which is read-only, read-write */
1279 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1280 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1281 s->s_flags &= ~MS_RDONLY;
1282 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1283 if (!old_format_only(s))
1284 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1285 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1286 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1287 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1289 /* this will force a full flush of all journal lists */
1290 SB_JOURNAL(s)->j_must_wait = 1;
1291 err = journal_end(&th, s, 10);
1296 if (!(*mount_flags & MS_RDONLY)) {
1297 finish_unfinished(s);
1298 reiserfs_xattr_init(s, *mount_flags);
1302 replace_mount_options(s, new_opts);
1303 reiserfs_write_unlock(s);
1308 reiserfs_write_unlock(s);
1312 static int read_super_block(struct super_block *s, int offset)
1314 struct buffer_head *bh;
1315 struct reiserfs_super_block *rs;
1318 bh = sb_bread(s, offset / s->s_blocksize);
1320 reiserfs_warning(s, "sh-2006",
1321 "bread failed (dev %s, block %lu, size %lu)",
1322 reiserfs_bdevname(s), offset / s->s_blocksize,
1327 rs = (struct reiserfs_super_block *)bh->b_data;
1328 if (!is_any_reiserfs_magic_string(rs)) {
1333 // ok, reiserfs signature (old or new) found in at the given offset
1335 fs_blocksize = sb_blocksize(rs);
1337 sb_set_blocksize(s, fs_blocksize);
1339 bh = sb_bread(s, offset / s->s_blocksize);
1341 reiserfs_warning(s, "sh-2007",
1342 "bread failed (dev %s, block %lu, size %lu)",
1343 reiserfs_bdevname(s), offset / s->s_blocksize,
1348 rs = (struct reiserfs_super_block *)bh->b_data;
1349 if (sb_blocksize(rs) != s->s_blocksize) {
1350 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1351 "filesystem on (dev %s, block %Lu, size %lu)",
1352 reiserfs_bdevname(s),
1353 (unsigned long long)bh->b_blocknr,
1359 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1361 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1362 "--rebuild-tree run detected. Please run\n"
1363 "reiserfsck --rebuild-tree and wait for a "
1364 "completion. If that fails\n"
1365 "get newer reiserfsprogs package");
1369 SB_BUFFER_WITH_SB(s) = bh;
1370 SB_DISK_SUPER_BLOCK(s) = rs;
1372 if (is_reiserfs_jr(rs)) {
1373 /* magic is of non-standard journal filesystem, look at s_version to
1374 find which format is in use */
1375 if (sb_version(rs) == REISERFS_VERSION_2)
1376 reiserfs_info(s, "found reiserfs format \"3.6\""
1377 " with non-standard journal\n");
1378 else if (sb_version(rs) == REISERFS_VERSION_1)
1379 reiserfs_info(s, "found reiserfs format \"3.5\""
1380 " with non-standard journal\n");
1382 reiserfs_warning(s, "sh-2012", "found unknown "
1383 "format \"%u\" of reiserfs with "
1384 "non-standard magic", sb_version(rs));
1388 /* s_version of standard format may contain incorrect information,
1389 so we just look at the magic string */
1391 "found reiserfs format \"%s\" with standard journal\n",
1392 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1394 s->s_op = &reiserfs_sops;
1395 s->s_export_op = &reiserfs_export_ops;
1397 s->s_qcop = &reiserfs_qctl_operations;
1398 s->dq_op = &reiserfs_quota_operations;
1401 /* new format is limited by the 32 bit wide i_blocks field, want to
1402 ** be one full block below that.
1404 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1408 /* after journal replay, reread all bitmap and super blocks */
1409 static int reread_meta_blocks(struct super_block *s)
1411 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1412 reiserfs_write_unlock(s);
1413 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1414 reiserfs_write_lock(s);
1415 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1416 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1423 /////////////////////////////////////////////////////
1424 // hash detection stuff
1426 // if root directory is empty - we set default - Yura's - hash and
1428 // FIXME: we look for only one name in a directory. If tea and yura
1429 // bith have the same value - we ask user to send report to the
1431 static __u32 find_hash_out(struct super_block *s)
1434 struct inode *inode;
1436 INITIALIZE_PATH(path);
1437 struct reiserfs_dir_entry de;
1438 __u32 hash = DEFAULT_HASH;
1440 inode = s->s_root->d_inode;
1442 do { // Some serious "goto"-hater was there ;)
1443 u32 teahash, r5hash, yurahash;
1445 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1446 retval = search_by_entry_key(s, &key, &path, &de);
1447 if (retval == IO_ERROR) {
1451 if (retval == NAME_NOT_FOUND)
1453 set_de_name_and_namelen(&de);
1454 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1455 /* allow override in this case */
1456 if (reiserfs_rupasov_hash(s)) {
1459 reiserfs_info(s, "FS seems to be empty, autodetect "
1460 "is using the default hash\n");
1463 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1464 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1465 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1466 if (((teahash == r5hash)
1468 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1469 == r5hash)) || ((teahash == yurahash)
1471 GET_HASH_VALUE(deh_offset
1476 || ((r5hash == yurahash)
1478 GET_HASH_VALUE(deh_offset
1479 (&(de.de_deh[de.de_entry_num])))))) {
1480 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1481 "automatically detect hash function. "
1482 "Please mount with -o "
1483 "hash={tea,rupasov,r5}");
1487 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1490 else if (GET_HASH_VALUE
1491 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1493 else if (GET_HASH_VALUE
1494 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1497 reiserfs_warning(s, "reiserfs-2506",
1498 "Unrecognised hash function");
1507 // finds out which hash names are sorted with
1508 static int what_hash(struct super_block *s)
1512 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1514 /* reiserfs_hash_detect() == true if any of the hash mount options
1515 ** were used. We must check them to make sure the user isn't
1516 ** using a bad hash value
1518 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1519 code = find_hash_out(s);
1521 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1522 /* detection has found the hash, and we must check against the
1525 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1526 reiserfs_warning(s, "reiserfs-2507",
1527 "Error, %s hash detected, "
1528 "unable to force rupasov hash",
1529 reiserfs_hashname(code));
1531 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1532 reiserfs_warning(s, "reiserfs-2508",
1533 "Error, %s hash detected, "
1534 "unable to force tea hash",
1535 reiserfs_hashname(code));
1537 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1538 reiserfs_warning(s, "reiserfs-2509",
1539 "Error, %s hash detected, "
1540 "unable to force r5 hash",
1541 reiserfs_hashname(code));
1545 /* find_hash_out was not called or could not determine the hash */
1546 if (reiserfs_rupasov_hash(s)) {
1548 } else if (reiserfs_tea_hash(s)) {
1550 } else if (reiserfs_r5_hash(s)) {
1555 /* if we are mounted RW, and we have a new valid hash code, update
1558 if (code != UNSET_HASH &&
1559 !(s->s_flags & MS_RDONLY) &&
1560 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1561 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1566 // return pointer to appropriate function
1567 static hashf_t hash_function(struct super_block *s)
1569 switch (what_hash(s)) {
1571 reiserfs_info(s, "Using tea hash to sort names\n");
1574 reiserfs_info(s, "Using rupasov hash to sort names\n");
1577 reiserfs_info(s, "Using r5 hash to sort names\n");
1583 // this is used to set up correct value for old partitions
1584 static int function2code(hashf_t func)
1586 if (func == keyed_hash)
1588 if (func == yura_hash)
1590 if (func == r5_hash)
1593 BUG(); // should never happen
1598 #define SWARN(silent, s, id, ...) \
1600 reiserfs_warning(s, id, __VA_ARGS__)
1602 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1604 struct inode *root_inode;
1605 struct reiserfs_transaction_handle th;
1607 unsigned long blocks;
1608 unsigned int commit_max_age = 0;
1610 struct reiserfs_iget_args args;
1611 struct reiserfs_super_block *rs;
1613 struct reiserfs_sb_info *sbi;
1614 int errval = -EINVAL;
1615 char *qf_names[MAXQUOTAS] = {};
1616 unsigned int qfmt = 0;
1618 save_mount_options(s, data);
1620 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1624 /* Set default values for options: non-aggressive tails, RO on errors */
1625 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1626 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1627 /* no preallocation minimum, be smart in
1628 reiserfs_file_write instead */
1629 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1630 /* Preallocate by 16 blocks (17-1) at once */
1631 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1632 /* setup default block allocator options */
1633 reiserfs_init_alloc_options(s);
1635 mutex_init(&REISERFS_SB(s)->lock);
1636 REISERFS_SB(s)->lock_depth = -1;
1639 * This function is called with the bkl, which also was the old
1640 * locking used here.
1641 * do_journal_begin() will soon check if we hold the lock (ie: was the
1642 * bkl). This is likely because do_journal_begin() has several another
1643 * callers because at this time, it doesn't seem to be necessary to
1644 * protect against anything.
1645 * Anyway, let's be conservative and lock for now.
1647 reiserfs_write_lock(s);
1650 if (reiserfs_parse_options
1651 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1652 &commit_max_age, qf_names, &qfmt) == 0) {
1656 handle_quota_files(s, qf_names, &qfmt);
1660 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1664 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1665 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1667 /* try new format (64-th 1k block), which can contain reiserfs super block */
1668 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1669 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1670 reiserfs_bdevname(s));
1674 rs = SB_DISK_SUPER_BLOCK(s);
1675 /* Let's do basic sanity check to verify that underlying device is not
1676 smaller than the filesystem. If the check fails then abort and scream,
1677 because bad stuff will happen otherwise. */
1678 if (s->s_bdev && s->s_bdev->bd_inode
1679 && i_size_read(s->s_bdev->bd_inode) <
1680 sb_block_count(rs) * sb_blocksize(rs)) {
1681 SWARN(silent, s, "", "Filesystem cannot be "
1682 "mounted because it is bigger than the device");
1683 SWARN(silent, s, "", "You may need to run fsck "
1684 "or increase size of your LVM partition");
1685 SWARN(silent, s, "", "Or may be you forgot to "
1686 "reboot after fdisk when it told you to");
1690 sbi->s_mount_state = SB_REISERFS_STATE(s);
1691 sbi->s_mount_state = REISERFS_VALID_FS;
1693 if ((errval = reiserfs_init_bitmap_cache(s))) {
1694 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1698 #ifdef CONFIG_REISERFS_CHECK
1699 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1700 SWARN(silent, s, "", "- it is slow mode for debugging.");
1703 /* make data=ordered the default */
1704 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1705 !reiserfs_data_writeback(s)) {
1706 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1709 if (reiserfs_data_log(s)) {
1710 reiserfs_info(s, "using journaled data mode\n");
1711 } else if (reiserfs_data_ordered(s)) {
1712 reiserfs_info(s, "using ordered data mode\n");
1714 reiserfs_info(s, "using writeback data mode\n");
1716 if (reiserfs_barrier_flush(s)) {
1717 printk("reiserfs: using flush barriers\n");
1719 // set_device_ro(s->s_dev, 1) ;
1720 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1721 SWARN(silent, s, "sh-2022",
1722 "unable to initialize journal space");
1725 jinit_done = 1; /* once this is set, journal_release must be called
1726 ** if we error out of the mount
1729 if (reread_meta_blocks(s)) {
1730 SWARN(silent, s, "jmacd-9",
1731 "unable to reread meta blocks after journal init");
1738 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1739 SWARN(silent, s, "clm-7000",
1740 "Detected readonly device, marking FS readonly");
1741 s->s_flags |= MS_RDONLY;
1743 args.objectid = REISERFS_ROOT_OBJECTID;
1744 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1746 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1747 reiserfs_init_locked_inode, (void *)(&args));
1749 SWARN(silent, s, "jmacd-10", "get root inode failed");
1753 if (root_inode->i_state & I_NEW) {
1754 reiserfs_read_locked_inode(root_inode, &args);
1755 unlock_new_inode(root_inode);
1758 s->s_root = d_alloc_root(root_inode);
1763 // define and initialize hash function
1764 sbi->s_hash_function = hash_function(s);
1765 if (sbi->s_hash_function == NULL) {
1771 if (is_reiserfs_3_5(rs)
1772 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1773 set_bit(REISERFS_3_5, &(sbi->s_properties));
1774 else if (old_format)
1775 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1777 set_bit(REISERFS_3_6, &(sbi->s_properties));
1779 if (!(s->s_flags & MS_RDONLY)) {
1781 errval = journal_begin(&th, s, 1);
1787 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1789 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1790 set_sb_fs_state(rs, 0);
1792 /* Clear out s_bmap_nr if it would wrap. We can handle this
1793 * case, but older revisions can't. This will cause the
1794 * file system to fail mount on those older implementations,
1795 * avoiding corruption. -jeffm */
1796 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1797 sb_bmap_nr(rs) != 0) {
1798 reiserfs_warning(s, "super-2030", "This file system "
1799 "claims to use %u bitmap blocks in "
1800 "its super block, but requires %u. "
1801 "Clearing to zero.", sb_bmap_nr(rs),
1802 reiserfs_bmap_count(s));
1804 set_sb_bmap_nr(rs, 0);
1807 if (old_format_only(s)) {
1808 /* filesystem of format 3.5 either with standard or non-standard
1810 if (convert_reiserfs(s)) {
1811 /* and -o conv is given */
1814 "converting 3.5 filesystem to the 3.6 format");
1816 if (is_reiserfs_3_5(rs))
1817 /* put magic string of 3.6 format. 2.2 will not be able to
1818 mount this filesystem anymore */
1819 memcpy(rs->s_v1.s_magic,
1820 reiserfs_3_6_magic_string,
1822 (reiserfs_3_6_magic_string));
1824 set_sb_version(rs, REISERFS_VERSION_2);
1825 reiserfs_convert_objectid_map_v1(s);
1826 set_bit(REISERFS_3_6, &(sbi->s_properties));
1827 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1828 } else if (!silent) {
1829 reiserfs_info(s, "using 3.5.x disk format\n");
1832 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1835 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1836 errval = journal_end(&th, s, 1);
1843 if ((errval = reiserfs_lookup_privroot(s)) ||
1844 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1850 /* look for files which were to be removed in previous session */
1851 finish_unfinished(s);
1853 if (old_format_only(s) && !silent) {
1854 reiserfs_info(s, "using 3.5.x disk format\n");
1857 if ((errval = reiserfs_lookup_privroot(s)) ||
1858 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1864 // mark hash in super block: it could be unset. overwrite should be ok
1865 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1869 reiserfs_proc_info_init(s);
1871 init_waitqueue_head(&(sbi->s_wait));
1872 spin_lock_init(&sbi->bitmap_lock);
1874 reiserfs_write_unlock(s);
1879 if (jinit_done) { /* kill the commit thread, free journal ram */
1880 journal_release_error(NULL, s);
1883 reiserfs_write_unlock(s);
1885 reiserfs_free_bitmap_cache(s);
1886 if (SB_BUFFER_WITH_SB(s))
1887 brelse(SB_BUFFER_WITH_SB(s));
1891 for (j = 0; j < MAXQUOTAS; j++)
1897 s->s_fs_info = NULL;
1901 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1903 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1905 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1906 buf->f_bfree = sb_free_blocks(rs);
1907 buf->f_bavail = buf->f_bfree;
1908 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1909 buf->f_bsize = dentry->d_sb->s_blocksize;
1910 /* changed to accommodate gcc folks. */
1911 buf->f_type = REISERFS_SUPER_MAGIC;
1912 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1913 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1914 sizeof(rs->s_uuid)/2);
1920 static int reiserfs_write_dquot(struct dquot *dquot)
1922 struct reiserfs_transaction_handle th;
1925 reiserfs_write_lock(dquot->dq_sb);
1927 journal_begin(&th, dquot->dq_sb,
1928 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1931 ret = dquot_commit(dquot);
1933 journal_end(&th, dquot->dq_sb,
1934 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1938 reiserfs_write_unlock(dquot->dq_sb);
1942 static int reiserfs_acquire_dquot(struct dquot *dquot)
1944 struct reiserfs_transaction_handle th;
1947 reiserfs_write_lock(dquot->dq_sb);
1949 journal_begin(&th, dquot->dq_sb,
1950 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1953 ret = dquot_acquire(dquot);
1955 journal_end(&th, dquot->dq_sb,
1956 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1960 reiserfs_write_unlock(dquot->dq_sb);
1964 static int reiserfs_release_dquot(struct dquot *dquot)
1966 struct reiserfs_transaction_handle th;
1969 reiserfs_write_lock(dquot->dq_sb);
1971 journal_begin(&th, dquot->dq_sb,
1972 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1974 /* Release dquot anyway to avoid endless cycle in dqput() */
1975 dquot_release(dquot);
1978 ret = dquot_release(dquot);
1980 journal_end(&th, dquot->dq_sb,
1981 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1985 reiserfs_write_unlock(dquot->dq_sb);
1989 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1991 /* Are we journaling quotas? */
1992 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1993 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1994 dquot_mark_dquot_dirty(dquot);
1995 return reiserfs_write_dquot(dquot);
1997 return dquot_mark_dquot_dirty(dquot);
2000 static int reiserfs_write_info(struct super_block *sb, int type)
2002 struct reiserfs_transaction_handle th;
2005 /* Data block + inode block */
2006 reiserfs_write_lock(sb);
2007 ret = journal_begin(&th, sb, 2);
2010 ret = dquot_commit_info(sb, type);
2011 err = journal_end(&th, sb, 2);
2015 reiserfs_write_unlock(sb);
2020 * Turn on quotas during mount time - we need to find the quota file and such...
2022 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2024 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2025 REISERFS_SB(sb)->s_jquota_fmt, type);
2029 * Standard function to be called on quota_on
2031 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2032 char *name, int remount)
2036 struct inode *inode;
2037 struct reiserfs_transaction_handle th;
2039 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2041 /* No more checks needed? Path and format_id are bogus anyway... */
2043 return vfs_quota_on(sb, type, format_id, name, 1);
2044 err = kern_path(name, LOOKUP_FOLLOW, &path);
2047 /* Quotafile not on the same filesystem? */
2048 if (path.mnt->mnt_sb != sb) {
2052 inode = path.dentry->d_inode;
2053 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2054 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2055 err = reiserfs_unpack(inode, NULL);
2057 reiserfs_warning(sb, "super-6520",
2058 "Unpacking tail of quota file failed"
2059 " (%d). Cannot turn on quotas.", err);
2063 mark_inode_dirty(inode);
2065 /* Journaling quota? */
2066 if (REISERFS_SB(sb)->s_qf_names[type]) {
2067 /* Quotafile not of fs root? */
2068 if (path.dentry->d_parent != sb->s_root)
2069 reiserfs_warning(sb, "super-6521",
2070 "Quota file not on filesystem root. "
2071 "Journalled quota will not work.");
2075 * When we journal data on quota file, we have to flush journal to see
2076 * all updates to the file when we bypass pagecache...
2078 if (reiserfs_file_data_log(inode)) {
2079 /* Just start temporary transaction and finish it */
2080 err = journal_begin(&th, sb, 1);
2083 err = journal_end_sync(&th, sb, 1);
2087 err = vfs_quota_on_path(sb, type, format_id, &path);
2093 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2094 * acquiring the locks... As quota files are never truncated and quota code
2095 * itself serializes the operations (and noone else should touch the files)
2096 * we don't have to be afraid of races */
2097 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2098 size_t len, loff_t off)
2100 struct inode *inode = sb_dqopt(sb)->files[type];
2101 unsigned long blk = off >> sb->s_blocksize_bits;
2102 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2104 struct buffer_head tmp_bh, *bh;
2105 loff_t i_size = i_size_read(inode);
2109 if (off + len > i_size)
2112 while (toread > 0) {
2114 sb->s_blocksize - offset <
2115 toread ? sb->s_blocksize - offset : toread;
2117 /* Quota files are without tails so we can safely use this function */
2118 reiserfs_write_lock(sb);
2119 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2120 reiserfs_write_unlock(sb);
2123 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2124 memset(data, 0, tocopy);
2126 bh = sb_bread(sb, tmp_bh.b_blocknr);
2129 memcpy(data, bh->b_data + offset, tocopy);
2140 /* Write to quotafile (we know the transaction is already started and has
2141 * enough credits) */
2142 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2143 const char *data, size_t len, loff_t off)
2145 struct inode *inode = sb_dqopt(sb)->files[type];
2146 unsigned long blk = off >> sb->s_blocksize_bits;
2147 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2148 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2149 size_t towrite = len;
2150 struct buffer_head tmp_bh, *bh;
2152 if (!current->journal_info) {
2153 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2154 " cancelled because transaction is not started.\n",
2155 (unsigned long long)off, (unsigned long long)len);
2158 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2159 while (towrite > 0) {
2160 tocopy = sb->s_blocksize - offset < towrite ?
2161 sb->s_blocksize - offset : towrite;
2163 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2166 if (offset || tocopy != sb->s_blocksize)
2167 bh = sb_bread(sb, tmp_bh.b_blocknr);
2169 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2175 memcpy(bh->b_data + offset, data, tocopy);
2176 flush_dcache_page(bh->b_page);
2177 set_buffer_uptodate(bh);
2179 reiserfs_prepare_for_journal(sb, bh, 1);
2180 journal_mark_dirty(current->journal_info, sb, bh);
2182 reiserfs_add_ordered_list(inode, bh);
2190 if (len == towrite) {
2191 mutex_unlock(&inode->i_mutex);
2194 if (inode->i_size < off + len - towrite)
2195 i_size_write(inode, off + len - towrite);
2197 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2198 mark_inode_dirty(inode);
2199 mutex_unlock(&inode->i_mutex);
2200 return len - towrite;
2205 static int get_super_block(struct file_system_type *fs_type,
2206 int flags, const char *dev_name,
2207 void *data, struct vfsmount *mnt)
2209 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2213 static int __init init_reiserfs_fs(void)
2217 if ((ret = init_inodecache())) {
2221 reiserfs_proc_info_global_init();
2223 ret = register_filesystem(&reiserfs_fs_type);
2229 reiserfs_proc_info_global_done();
2230 destroy_inodecache();
2235 static void __exit exit_reiserfs_fs(void)
2237 reiserfs_proc_info_global_done();
2238 unregister_filesystem(&reiserfs_fs_type);
2239 destroy_inodecache();
2242 struct file_system_type reiserfs_fs_type = {
2243 .owner = THIS_MODULE,
2245 .get_sb = get_super_block,
2246 .kill_sb = reiserfs_kill_sb,
2247 .fs_flags = FS_REQUIRES_DEV,
2250 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2251 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2252 MODULE_LICENSE("GPL");
2254 module_init(init_reiserfs_fs);
2255 module_exit(exit_reiserfs_fs);