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/mnt_namespace.h>
28 #include <linux/mount.h>
29 #include <linux/namei.h>
31 struct file_system_type reiserfs_fs_type;
33 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
34 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
35 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
37 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
39 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
40 strlen(reiserfs_3_5_magic_string));
43 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
45 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
46 strlen(reiserfs_3_6_magic_string));
49 int is_reiserfs_jr(struct reiserfs_super_block *rs)
51 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
52 strlen(reiserfs_jr_magic_string));
55 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
57 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
61 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
62 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
64 static int reiserfs_sync_fs(struct super_block *s, int wait)
66 if (!(s->s_flags & MS_RDONLY)) {
67 struct reiserfs_transaction_handle th;
68 reiserfs_write_lock(s);
69 if (!journal_begin(&th, s, 1))
70 if (!journal_end_sync(&th, s, 1))
71 reiserfs_flush_old_commits(s);
72 s->s_dirt = 0; /* Even if it's not true.
73 * We'll loop forever in sync_supers otherwise */
74 reiserfs_write_unlock(s);
81 static void reiserfs_write_super(struct super_block *s)
83 reiserfs_sync_fs(s, 1);
86 static void reiserfs_write_super_lockfs(struct super_block *s)
88 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
93 reiserfs_block_writes(&th);
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
103 reiserfs_write_unlock(s);
106 static void reiserfs_unlockfs(struct super_block *s)
108 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);
185 "reiserfs: cannot turn on journaled quota: error %d",
192 REISERFS_SB(s)->s_is_unlinked_ok = 1;
194 retval = search_item(s, &max_cpu_key, &path);
195 if (retval != ITEM_NOT_FOUND) {
197 "vs-2140: finish_unfinished: search_by_key returned %d",
202 bh = get_last_bh(&path);
203 item_pos = get_item_pos(&path);
204 if (item_pos != B_NR_ITEMS(bh)) {
206 "vs-2060: finish_unfinished: 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 */
237 "vs-2180: finish_unfinished: iget failed for %K",
239 retval = remove_save_link_only(s, &save_link_key, 1);
243 if (!truncate && inode->i_nlink) {
244 /* file is not unlinked */
246 "vs-2185: finish_unfinished: file %K is not unlinked",
248 retval = remove_save_link_only(s, &save_link_key, 0);
253 if (truncate && S_ISDIR(inode->i_mode)) {
254 /* We got a truncate request for a dir which is impossible.
255 The only imaginable way is to execute unfinished truncate request
256 then boot into old kernel, remove the file and create dir with
259 "green-2101: impossible truncate on a 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, "Dead loop in "
290 "finish_unfinished detected, "
291 "just remove save link\n");
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,
362 "green-2102: Adding a truncate savelink for a directory %k! Please report",
364 set_cpu_key_k_offset(&key, 1);
365 set_cpu_key_k_type(&key, TYPE_INDIRECT);
367 /* item head of "safe" link */
368 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
369 4 /*length */ , 0 /*free space */ );
373 /* look for its place in the tree */
374 retval = search_item(inode->i_sb, &key, &path);
375 if (retval != ITEM_NOT_FOUND) {
376 if (retval != -ENOSPC)
377 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
378 "search_by_key (%K) returned %d", &key,
384 /* body of "save" link */
385 link = INODE_PKEY(inode)->k_dir_id;
387 /* put "save" link inot tree, don't charge quota to anyone */
389 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
391 if (retval != -ENOSPC)
392 reiserfs_warning(inode->i_sb,
393 "vs-2120: add_save_link: insert_item returned %d",
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 #ifdef CONFIG_REISERFS_FS_XATTR
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;
455 if (REISERFS_SB(s)->priv_root) {
456 d_invalidate(REISERFS_SB(s)->priv_root);
457 dput(REISERFS_SB(s)->priv_root);
458 REISERFS_SB(s)->priv_root = NULL;
465 static void reiserfs_put_super(struct super_block *s)
467 struct reiserfs_transaction_handle th;
470 /* change file system state to current state if it was mounted with read-write permissions */
471 if (!(s->s_flags & MS_RDONLY)) {
472 if (!journal_begin(&th, s, 10)) {
473 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
475 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
476 REISERFS_SB(s)->s_mount_state);
477 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
481 /* note, journal_release checks for readonly mount, and can decide not
482 ** to do a journal_end
484 journal_release(&th, s);
486 reiserfs_free_bitmap_cache(s);
488 brelse(SB_BUFFER_WITH_SB(s));
492 if (REISERFS_SB(s)->reserved_blocks != 0) {
494 "green-2005: reiserfs_put_super: reserved blocks left %d",
495 REISERFS_SB(s)->reserved_blocks);
498 reiserfs_proc_info_done(s);
506 static struct kmem_cache *reiserfs_inode_cachep;
508 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
510 struct reiserfs_inode_info *ei;
511 ei = (struct reiserfs_inode_info *)
512 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
515 return &ei->vfs_inode;
518 static void reiserfs_destroy_inode(struct inode *inode)
520 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
523 static void init_once(void *foo)
525 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
527 INIT_LIST_HEAD(&ei->i_prealloc_list);
528 inode_init_once(&ei->vfs_inode);
529 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
530 ei->i_acl_access = NULL;
531 ei->i_acl_default = NULL;
535 static int init_inodecache(void)
537 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
539 reiserfs_inode_info),
540 0, (SLAB_RECLAIM_ACCOUNT|
543 if (reiserfs_inode_cachep == NULL)
548 static void destroy_inodecache(void)
550 kmem_cache_destroy(reiserfs_inode_cachep);
553 /* we don't mark inodes dirty, we just log them */
554 static void reiserfs_dirty_inode(struct inode *inode)
556 struct reiserfs_transaction_handle th;
559 if (inode->i_sb->s_flags & MS_RDONLY) {
560 reiserfs_warning(inode->i_sb,
561 "clm-6006: writing inode %lu on readonly FS",
565 reiserfs_write_lock(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);
572 reiserfs_write_unlock(inode->i_sb);
575 reiserfs_update_sd(&th, inode);
576 journal_end(&th, inode->i_sb, 1);
577 reiserfs_write_unlock(inode->i_sb);
580 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
581 static void reiserfs_clear_inode(struct inode *inode)
583 struct posix_acl *acl;
585 acl = REISERFS_I(inode)->i_acl_access;
586 if (acl && !IS_ERR(acl))
587 posix_acl_release(acl);
588 REISERFS_I(inode)->i_acl_access = NULL;
590 acl = REISERFS_I(inode)->i_acl_default;
591 if (acl && !IS_ERR(acl))
592 posix_acl_release(acl);
593 REISERFS_I(inode)->i_acl_default = NULL;
596 #define reiserfs_clear_inode NULL
600 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
602 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
606 static const struct super_operations reiserfs_sops = {
607 .alloc_inode = reiserfs_alloc_inode,
608 .destroy_inode = reiserfs_destroy_inode,
609 .write_inode = reiserfs_write_inode,
610 .dirty_inode = reiserfs_dirty_inode,
611 .delete_inode = reiserfs_delete_inode,
612 .clear_inode = reiserfs_clear_inode,
613 .put_super = reiserfs_put_super,
614 .write_super = reiserfs_write_super,
615 .sync_fs = reiserfs_sync_fs,
616 .write_super_lockfs = reiserfs_write_super_lockfs,
617 .unlockfs = reiserfs_unlockfs,
618 .statfs = reiserfs_statfs,
619 .remount_fs = reiserfs_remount,
620 .show_options = generic_show_options,
622 .quota_read = reiserfs_quota_read,
623 .quota_write = reiserfs_quota_write,
628 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
630 static int reiserfs_dquot_initialize(struct inode *, int);
631 static int reiserfs_dquot_drop(struct inode *);
632 static int reiserfs_write_dquot(struct dquot *);
633 static int reiserfs_acquire_dquot(struct dquot *);
634 static int reiserfs_release_dquot(struct dquot *);
635 static int reiserfs_mark_dquot_dirty(struct dquot *);
636 static int reiserfs_write_info(struct super_block *, int);
637 static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
639 static struct dquot_operations reiserfs_quota_operations = {
640 .initialize = reiserfs_dquot_initialize,
641 .drop = reiserfs_dquot_drop,
642 .alloc_space = dquot_alloc_space,
643 .alloc_inode = dquot_alloc_inode,
644 .free_space = dquot_free_space,
645 .free_inode = dquot_free_inode,
646 .transfer = dquot_transfer,
647 .write_dquot = reiserfs_write_dquot,
648 .acquire_dquot = reiserfs_acquire_dquot,
649 .release_dquot = reiserfs_release_dquot,
650 .mark_dirty = reiserfs_mark_dquot_dirty,
651 .write_info = reiserfs_write_info,
654 static struct quotactl_ops reiserfs_qctl_operations = {
655 .quota_on = reiserfs_quota_on,
656 .quota_off = vfs_quota_off,
657 .quota_sync = vfs_quota_sync,
658 .get_info = vfs_get_dqinfo,
659 .set_info = vfs_set_dqinfo,
660 .get_dqblk = vfs_get_dqblk,
661 .set_dqblk = vfs_set_dqblk,
665 static const struct export_operations reiserfs_export_ops = {
666 .encode_fh = reiserfs_encode_fh,
667 .fh_to_dentry = reiserfs_fh_to_dentry,
668 .fh_to_parent = reiserfs_fh_to_parent,
669 .get_parent = reiserfs_get_parent,
672 /* this struct is used in reiserfs_getopt () for containing the value for those
673 mount options that have values rather than being toggles. */
676 int setmask; /* bitmask which is to set on mount_options bitmask when this
677 value is found, 0 is no bits are to be changed. */
678 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
679 value is found, 0 is no bits are to be changed. This is
680 applied BEFORE setmask */
683 /* Set this bit in arg_required to allow empty arguments */
684 #define REISERFS_OPT_ALLOWEMPTY 31
686 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
690 int arg_required; /* 0 if argument is not required, not 0 otherwise */
691 const arg_desc_t *values; /* list of values accepted by an option */
692 int setmask; /* bitmask which is to set on mount_options bitmask when this
693 value is found, 0 is no bits are to be changed. */
694 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
695 value is found, 0 is no bits are to be changed. This is
696 applied BEFORE setmask */
699 /* possible values for -o data= */
700 static const arg_desc_t logging_mode[] = {
701 {"ordered", 1 << REISERFS_DATA_ORDERED,
702 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
703 {"journal", 1 << REISERFS_DATA_LOG,
704 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
705 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
706 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
710 /* possible values for -o barrier= */
711 static const arg_desc_t barrier_mode[] = {
712 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
713 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
717 /* possible values for "-o block-allocator=" and bits which are to be set in
718 s_mount_opt of reiserfs specific part of in-core super block */
719 static const arg_desc_t balloc[] = {
720 {"noborder", 1 << REISERFS_NO_BORDER, 0},
721 {"border", 0, 1 << REISERFS_NO_BORDER},
722 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
723 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
724 {"test4", 1 << REISERFS_TEST4, 0},
725 {"notest4", 0, 1 << REISERFS_TEST4},
729 static const arg_desc_t tails[] = {
730 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
731 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
732 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
736 static const arg_desc_t error_actions[] = {
737 {"panic", 1 << REISERFS_ERROR_PANIC,
738 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
739 {"ro-remount", 1 << REISERFS_ERROR_RO,
740 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
741 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
742 {"continue", 1 << REISERFS_ERROR_CONTINUE,
743 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
748 /* proceed only one option from a list *cur - string containing of mount options
749 opts - array of options which are accepted
750 opt_arg - if option is found and requires an argument and if it is specifed
751 in the input - pointer to the argument is stored here
752 bit_flags - if option requires to set a certain bit - it is set here
753 return -1 if unknown option is found, opt->arg_required otherwise */
754 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
755 char **opt_arg, unsigned long *bit_flags)
764 const opt_desc_t *opt;
765 const arg_desc_t *arg;
769 /* assume argument cannot contain commas */
770 *cur = strchr(p, ',');
776 if (!strncmp(p, "alloc=", 6)) {
777 /* Ugly special case, probably we should redo options parser so that
778 it can understand several arguments for some options, also so that
779 it can fill several bitfields with option values. */
780 if (reiserfs_parse_alloc_options(s, p + 6)) {
787 /* for every option in the list */
788 for (opt = opts; opt->option_name; opt++) {
789 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
792 (1 << REISERFS_UNSUPPORTED_OPT))
793 reiserfs_warning(s, "%s not supported.",
796 *bit_flags &= ~opt->clrmask;
798 (1 << REISERFS_UNSUPPORTED_OPT))
799 reiserfs_warning(s, "%s not supported.",
802 *bit_flags |= opt->setmask;
807 if (!opt->option_name) {
808 reiserfs_warning(s, "unknown mount option \"%s\"", p);
812 p += strlen(opt->option_name);
815 if (!opt->arg_required) {
817 "the option \"%s\" does not require an argument",
824 if (opt->arg_required) {
826 "the option \"%s\" requires an argument",
832 reiserfs_warning(s, "head of option \"%s\" is only correct",
837 /* move to the argument, or to next option if argument is not required */
840 if (opt->arg_required
841 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
843 /* this catches "option=," if not allowed */
844 reiserfs_warning(s, "empty argument for \"%s\"",
850 /* *=NULLopt_arg contains pointer to argument */
852 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
855 /* values possible for this option are listed in opt->values */
856 for (arg = opt->values; arg->value; arg++) {
857 if (!strcmp(p, arg->value)) {
859 *bit_flags &= ~arg->clrmask;
860 *bit_flags |= arg->setmask;
862 return opt->arg_required;
866 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
871 /* returns 0 if something is wrong in option string, 1 - otherwise */
872 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
873 unsigned long *mount_options,
874 /* after the parsing phase, contains the
875 collection of bitflags defining what
876 mount options were selected. */
877 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
879 unsigned int *commit_max_age,
886 opt_desc_t opts[] = {
887 /* Compatibility stuff, so that -o notail for old setups still work */
888 {"tails",.arg_required = 't',.values = tails},
890 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
891 {"conv",.setmask = 1 << REISERFS_CONVERT},
892 {"attrs",.setmask = 1 << REISERFS_ATTRS},
893 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
894 #ifdef CONFIG_REISERFS_FS_XATTR
895 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
896 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
898 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
899 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
901 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
902 {"acl",.setmask = 1 << REISERFS_POSIXACL},
903 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
905 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
906 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
908 {.option_name = "nolog"},
909 {"replayonly",.setmask = 1 << REPLAYONLY},
910 {"block-allocator",.arg_required = 'a',.values = balloc},
911 {"data",.arg_required = 'd',.values = logging_mode},
912 {"barrier",.arg_required = 'b',.values = barrier_mode},
913 {"resize",.arg_required = 'r',.values = NULL},
914 {"jdev",.arg_required = 'j',.values = NULL},
915 {"nolargeio",.arg_required = 'w',.values = NULL},
916 {"commit",.arg_required = 'c',.values = NULL},
917 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
918 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
919 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
920 {"errors",.arg_required = 'e',.values = error_actions},
921 {"usrjquota",.arg_required =
922 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
923 {"grpjquota",.arg_required =
924 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
925 {"jqfmt",.arg_required = 'f',.values = NULL},
926 {.option_name = NULL}
930 if (!options || !*options)
931 /* use default configuration: create tails, journaling on, no
932 conversion to newest format */
935 for (pos = options; pos;) {
936 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
938 /* wrong option is given */
945 /* "resize=NNN" or "resize=auto" */
947 if (!strcmp(arg, "auto")) {
948 /* From JFS code, to auto-get the size. */
950 s->s_bdev->bd_inode->i_size >> s->
953 *blocks = simple_strtoul(arg, &p, 0);
955 /* NNN does not look like a number */
957 "reiserfs_parse_options: bad value %s",
966 unsigned long val = simple_strtoul(arg, &p, 0);
967 /* commit=NNN (time in seconds) */
968 if (*p != '\0' || val >= (unsigned int)-1) {
970 "reiserfs_parse_options: bad value %s",
974 *commit_max_age = (unsigned int)val;
978 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
983 if (arg && *arg && jdev_name) {
984 if (*jdev_name) { //Hm, already assigned?
986 "reiserfs_parse_options: journal device was already specified to be %s",
994 if (c == 'u' || c == 'g') {
995 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
997 if (sb_any_quota_loaded(s) &&
998 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1000 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
1003 if (*arg) { /* Some filename specified? */
1004 if (REISERFS_SB(s)->s_qf_names[qtype]
1005 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1008 "reiserfs_parse_options: %s quota file already specified.",
1012 if (strchr(arg, '/')) {
1014 "reiserfs_parse_options: quotafile must be on filesystem root.");
1018 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1019 if (!qf_names[qtype]) {
1021 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1024 strcpy(qf_names[qtype], arg);
1025 *mount_options |= 1 << REISERFS_QUOTA;
1027 if (qf_names[qtype] !=
1028 REISERFS_SB(s)->s_qf_names[qtype])
1029 kfree(qf_names[qtype]);
1030 qf_names[qtype] = NULL;
1034 if (!strcmp(arg, "vfsold"))
1035 *qfmt = QFMT_VFS_OLD;
1036 else if (!strcmp(arg, "vfsv0"))
1037 *qfmt = QFMT_VFS_V0;
1040 "reiserfs_parse_options: unknown quota format specified.");
1043 if (sb_any_quota_loaded(s) &&
1044 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1046 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
1051 if (c == 'u' || c == 'g' || c == 'f') {
1053 "reiserfs_parse_options: journaled quota options not supported.");
1060 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1061 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1063 "reiserfs_parse_options: journaled quota format not specified.");
1066 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1067 if (!(*mount_options & (1 << REISERFS_QUOTA))
1068 && sb_any_quota_loaded(s)) {
1070 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1078 static void switch_data_mode(struct super_block *s, unsigned long mode)
1080 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1081 (1 << REISERFS_DATA_ORDERED) |
1082 (1 << REISERFS_DATA_WRITEBACK));
1083 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1086 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1088 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1089 if (!reiserfs_data_log(s)) {
1090 switch_data_mode(s, REISERFS_DATA_LOG);
1091 reiserfs_info(s, "switching to journaled data mode\n");
1093 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1094 if (!reiserfs_data_ordered(s)) {
1095 switch_data_mode(s, REISERFS_DATA_ORDERED);
1096 reiserfs_info(s, "switching to ordered data mode\n");
1098 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1099 if (!reiserfs_data_writeback(s)) {
1100 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1101 reiserfs_info(s, "switching to writeback data mode\n");
1106 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1108 int flush = (1 << REISERFS_BARRIER_FLUSH);
1109 int none = (1 << REISERFS_BARRIER_NONE);
1110 int all_barrier = flush | none;
1112 if (bits & all_barrier) {
1113 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1115 REISERFS_SB(s)->s_mount_opt |= flush;
1116 printk("reiserfs: enabling write barrier flush mode\n");
1117 } else if (bits & none) {
1118 REISERFS_SB(s)->s_mount_opt |= none;
1119 printk("reiserfs: write barriers turned off\n");
1124 static void handle_attrs(struct super_block *s)
1126 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1128 if (reiserfs_attrs(s)) {
1129 if (old_format_only(s)) {
1131 "reiserfs: cannot support attributes on 3.5.x disk format");
1132 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1135 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1137 "reiserfs: cannot support attributes until flag is set in super-block");
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;
1174 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1177 rs = SB_DISK_SUPER_BLOCK(s);
1179 if (!reiserfs_parse_options
1180 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1183 for (i = 0; i < MAXQUOTAS; i++)
1184 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1191 handle_quota_files(s, qf_names, &qfmt);
1196 /* Add options that are safe here */
1197 safe_mask |= 1 << REISERFS_SMALLTAIL;
1198 safe_mask |= 1 << REISERFS_LARGETAIL;
1199 safe_mask |= 1 << REISERFS_NO_BORDER;
1200 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1201 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1202 safe_mask |= 1 << REISERFS_TEST4;
1203 safe_mask |= 1 << REISERFS_ATTRS;
1204 safe_mask |= 1 << REISERFS_XATTRS_USER;
1205 safe_mask |= 1 << REISERFS_POSIXACL;
1206 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1207 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1208 safe_mask |= 1 << REISERFS_ERROR_RO;
1209 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1210 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1211 safe_mask |= 1 << REISERFS_QUOTA;
1213 /* Update the bitmask, taking care to keep
1214 * the bits we're not allowed to change here */
1215 REISERFS_SB(s)->s_mount_opt =
1217 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1219 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1220 journal->j_max_commit_age = commit_max_age;
1221 journal->j_max_trans_age = commit_max_age;
1222 } else if (commit_max_age == 0) {
1223 /* 0 means restore defaults. */
1224 journal->j_max_commit_age = journal->j_default_max_commit_age;
1225 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1229 err = reiserfs_resize(s, blocks);
1234 if (*mount_flags & MS_RDONLY) {
1235 reiserfs_xattr_init(s, *mount_flags);
1236 /* remount read-only */
1237 if (s->s_flags & MS_RDONLY)
1238 /* it is read-only already */
1240 /* try to remount file system with read-only permissions */
1241 if (sb_umount_state(rs) == REISERFS_VALID_FS
1242 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1246 err = journal_begin(&th, s, 10);
1250 /* Mounting a rw partition read-only. */
1251 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1252 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1253 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1255 /* remount read-write */
1256 if (!(s->s_flags & MS_RDONLY)) {
1257 reiserfs_xattr_init(s, *mount_flags);
1258 goto out_ok; /* We are read-write already */
1261 if (reiserfs_is_journal_aborted(journal)) {
1262 err = journal->j_errno;
1266 handle_data_mode(s, mount_options);
1267 handle_barrier_mode(s, mount_options);
1268 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1269 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1270 err = journal_begin(&th, s, 10);
1274 /* Mount a partition which is read-only, read-write */
1275 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1276 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1277 s->s_flags &= ~MS_RDONLY;
1278 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1279 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1280 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1281 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1283 /* this will force a full flush of all journal lists */
1284 SB_JOURNAL(s)->j_must_wait = 1;
1285 err = journal_end(&th, s, 10);
1290 if (!(*mount_flags & MS_RDONLY)) {
1291 finish_unfinished(s);
1292 reiserfs_xattr_init(s, *mount_flags);
1296 kfree(s->s_options);
1297 s->s_options = new_opts;
1305 static int read_super_block(struct super_block *s, int offset)
1307 struct buffer_head *bh;
1308 struct reiserfs_super_block *rs;
1311 bh = sb_bread(s, offset / s->s_blocksize);
1313 reiserfs_warning(s, "sh-2006: read_super_block: "
1314 "bread failed (dev %s, block %lu, size %lu)",
1315 reiserfs_bdevname(s), offset / s->s_blocksize,
1320 rs = (struct reiserfs_super_block *)bh->b_data;
1321 if (!is_any_reiserfs_magic_string(rs)) {
1326 // ok, reiserfs signature (old or new) found in at the given offset
1328 fs_blocksize = sb_blocksize(rs);
1330 sb_set_blocksize(s, fs_blocksize);
1332 bh = sb_bread(s, offset / s->s_blocksize);
1334 reiserfs_warning(s, "sh-2007: read_super_block: "
1335 "bread failed (dev %s, block %lu, size %lu)\n",
1336 reiserfs_bdevname(s), offset / s->s_blocksize,
1341 rs = (struct reiserfs_super_block *)bh->b_data;
1342 if (sb_blocksize(rs) != s->s_blocksize) {
1343 reiserfs_warning(s, "sh-2011: read_super_block: "
1344 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1345 reiserfs_bdevname(s),
1346 (unsigned long long)bh->b_blocknr,
1352 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1355 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1356 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1357 "get newer reiserfsprogs package");
1361 SB_BUFFER_WITH_SB(s) = bh;
1362 SB_DISK_SUPER_BLOCK(s) = rs;
1364 if (is_reiserfs_jr(rs)) {
1365 /* magic is of non-standard journal filesystem, look at s_version to
1366 find which format is in use */
1367 if (sb_version(rs) == REISERFS_VERSION_2)
1369 "read_super_block: found reiserfs format \"3.6\""
1370 " with non-standard journal");
1371 else if (sb_version(rs) == REISERFS_VERSION_1)
1373 "read_super_block: found reiserfs format \"3.5\""
1374 " with non-standard journal");
1377 "sh-2012: read_super_block: found unknown "
1378 "format \"%u\" of reiserfs with non-standard magic",
1383 /* s_version of standard format may contain incorrect information,
1384 so we just look at the magic string */
1386 "found reiserfs format \"%s\" with standard journal\n",
1387 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1389 s->s_op = &reiserfs_sops;
1390 s->s_export_op = &reiserfs_export_ops;
1392 s->s_qcop = &reiserfs_qctl_operations;
1393 s->dq_op = &reiserfs_quota_operations;
1396 /* new format is limited by the 32 bit wide i_blocks field, want to
1397 ** be one full block below that.
1399 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1403 /* after journal replay, reread all bitmap and super blocks */
1404 static int reread_meta_blocks(struct super_block *s)
1406 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1407 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1408 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1410 "reread_meta_blocks, error reading the super");
1417 /////////////////////////////////////////////////////
1418 // hash detection stuff
1420 // if root directory is empty - we set default - Yura's - hash and
1422 // FIXME: we look for only one name in a directory. If tea and yura
1423 // bith have the same value - we ask user to send report to the
1425 static __u32 find_hash_out(struct super_block *s)
1428 struct inode *inode;
1430 INITIALIZE_PATH(path);
1431 struct reiserfs_dir_entry de;
1432 __u32 hash = DEFAULT_HASH;
1434 inode = s->s_root->d_inode;
1436 do { // Some serious "goto"-hater was there ;)
1437 u32 teahash, r5hash, yurahash;
1439 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1440 retval = search_by_entry_key(s, &key, &path, &de);
1441 if (retval == IO_ERROR) {
1445 if (retval == NAME_NOT_FOUND)
1447 set_de_name_and_namelen(&de);
1448 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1449 /* allow override in this case */
1450 if (reiserfs_rupasov_hash(s)) {
1453 reiserfs_warning(s, "FS seems to be empty, autodetect "
1454 "is using the default hash");
1457 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1458 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1459 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1460 if (((teahash == r5hash)
1462 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1463 == r5hash)) || ((teahash == yurahash)
1465 GET_HASH_VALUE(deh_offset
1470 || ((r5hash == yurahash)
1472 GET_HASH_VALUE(deh_offset
1473 (&(de.de_deh[de.de_entry_num])))))) {
1475 "Unable to automatically detect hash function. "
1476 "Please mount with -o hash={tea,rupasov,r5}",
1477 reiserfs_bdevname(s));
1481 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1484 else if (GET_HASH_VALUE
1485 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1487 else if (GET_HASH_VALUE
1488 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1491 reiserfs_warning(s, "Unrecognised hash function");
1500 // finds out which hash names are sorted with
1501 static int what_hash(struct super_block *s)
1505 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1507 /* reiserfs_hash_detect() == true if any of the hash mount options
1508 ** were used. We must check them to make sure the user isn't
1509 ** using a bad hash value
1511 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1512 code = find_hash_out(s);
1514 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1515 /* detection has found the hash, and we must check against the
1518 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1519 reiserfs_warning(s, "Error, %s hash detected, "
1520 "unable to force rupasov hash",
1521 reiserfs_hashname(code));
1523 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1524 reiserfs_warning(s, "Error, %s hash detected, "
1525 "unable to force tea hash",
1526 reiserfs_hashname(code));
1528 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1529 reiserfs_warning(s, "Error, %s hash detected, "
1530 "unable to force r5 hash",
1531 reiserfs_hashname(code));
1535 /* find_hash_out was not called or could not determine the hash */
1536 if (reiserfs_rupasov_hash(s)) {
1538 } else if (reiserfs_tea_hash(s)) {
1540 } else if (reiserfs_r5_hash(s)) {
1545 /* if we are mounted RW, and we have a new valid hash code, update
1548 if (code != UNSET_HASH &&
1549 !(s->s_flags & MS_RDONLY) &&
1550 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1551 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1556 // return pointer to appropriate function
1557 static hashf_t hash_function(struct super_block *s)
1559 switch (what_hash(s)) {
1561 reiserfs_info(s, "Using tea hash to sort names\n");
1564 reiserfs_info(s, "Using rupasov hash to sort names\n");
1567 reiserfs_info(s, "Using r5 hash to sort names\n");
1573 // this is used to set up correct value for old partitions
1574 static int function2code(hashf_t func)
1576 if (func == keyed_hash)
1578 if (func == yura_hash)
1580 if (func == r5_hash)
1583 BUG(); // should never happen
1588 #define SWARN(silent, s, ...) \
1590 reiserfs_warning (s, __VA_ARGS__)
1592 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1594 struct inode *root_inode;
1595 struct reiserfs_transaction_handle th;
1597 unsigned long blocks;
1598 unsigned int commit_max_age = 0;
1600 struct reiserfs_iget_args args;
1601 struct reiserfs_super_block *rs;
1603 struct reiserfs_sb_info *sbi;
1604 int errval = -EINVAL;
1605 char *qf_names[MAXQUOTAS] = {};
1606 unsigned int qfmt = 0;
1608 save_mount_options(s, data);
1610 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1616 /* Set default values for options: non-aggressive tails, RO on errors */
1617 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1618 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1619 /* no preallocation minimum, be smart in
1620 reiserfs_file_write instead */
1621 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1622 /* Preallocate by 16 blocks (17-1) at once */
1623 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1624 #ifdef CONFIG_REISERFS_FS_XATTR
1625 /* Initialize the rwsem for xattr dir */
1626 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1628 /* setup default block allocator options */
1629 reiserfs_init_alloc_options(s);
1632 if (reiserfs_parse_options
1633 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1634 &commit_max_age, qf_names, &qfmt) == 0) {
1638 handle_quota_files(s, qf_names, &qfmt);
1642 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1643 "for remount only");
1647 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1648 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1650 /* try new format (64-th 1k block), which can contain reiserfs super block */
1651 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1653 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1654 reiserfs_bdevname(s));
1658 rs = SB_DISK_SUPER_BLOCK(s);
1659 /* Let's do basic sanity check to verify that underlying device is not
1660 smaller than the filesystem. If the check fails then abort and scream,
1661 because bad stuff will happen otherwise. */
1662 if (s->s_bdev && s->s_bdev->bd_inode
1663 && i_size_read(s->s_bdev->bd_inode) <
1664 sb_block_count(rs) * sb_blocksize(rs)) {
1666 "Filesystem on %s cannot be mounted because it is bigger than the device",
1667 reiserfs_bdevname(s));
1669 "You may need to run fsck or increase size of your LVM partition");
1671 "Or may be you forgot to reboot after fdisk when it told you to");
1675 sbi->s_mount_state = SB_REISERFS_STATE(s);
1676 sbi->s_mount_state = REISERFS_VALID_FS;
1678 if ((errval = reiserfs_init_bitmap_cache(s))) {
1680 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1684 #ifdef CONFIG_REISERFS_CHECK
1685 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1686 SWARN(silent, s, "- it is slow mode for debugging.");
1689 /* make data=ordered the default */
1690 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1691 !reiserfs_data_writeback(s)) {
1692 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1695 if (reiserfs_data_log(s)) {
1696 reiserfs_info(s, "using journaled data mode\n");
1697 } else if (reiserfs_data_ordered(s)) {
1698 reiserfs_info(s, "using ordered data mode\n");
1700 reiserfs_info(s, "using writeback data mode\n");
1702 if (reiserfs_barrier_flush(s)) {
1703 printk("reiserfs: using flush barriers\n");
1705 // set_device_ro(s->s_dev, 1) ;
1706 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1708 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1711 jinit_done = 1; /* once this is set, journal_release must be called
1712 ** if we error out of the mount
1715 if (reread_meta_blocks(s)) {
1717 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1724 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1726 "clm-7000: Detected readonly device, marking FS readonly");
1727 s->s_flags |= MS_RDONLY;
1729 args.objectid = REISERFS_ROOT_OBJECTID;
1730 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1732 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1733 reiserfs_init_locked_inode, (void *)(&args));
1736 "jmacd-10: reiserfs_fill_super: get root inode failed");
1740 if (root_inode->i_state & I_NEW) {
1741 reiserfs_read_locked_inode(root_inode, &args);
1742 unlock_new_inode(root_inode);
1745 s->s_root = d_alloc_root(root_inode);
1750 // define and initialize hash function
1751 sbi->s_hash_function = hash_function(s);
1752 if (sbi->s_hash_function == NULL) {
1758 if (is_reiserfs_3_5(rs)
1759 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1760 set_bit(REISERFS_3_5, &(sbi->s_properties));
1761 else if (old_format)
1762 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1764 set_bit(REISERFS_3_6, &(sbi->s_properties));
1766 if (!(s->s_flags & MS_RDONLY)) {
1768 errval = journal_begin(&th, s, 1);
1774 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1776 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1777 set_sb_fs_state(rs, 0);
1779 /* Clear out s_bmap_nr if it would wrap. We can handle this
1780 * case, but older revisions can't. This will cause the
1781 * file system to fail mount on those older implementations,
1782 * avoiding corruption. -jeffm */
1783 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1784 sb_bmap_nr(rs) != 0) {
1785 reiserfs_warning(s, "super-2030: This file system "
1786 "claims to use %u bitmap blocks in "
1787 "its super block, but requires %u. "
1788 "Clearing to zero.", sb_bmap_nr(rs),
1789 reiserfs_bmap_count(s));
1791 set_sb_bmap_nr(rs, 0);
1794 if (old_format_only(s)) {
1795 /* filesystem of format 3.5 either with standard or non-standard
1797 if (convert_reiserfs(s)) {
1798 /* and -o conv is given */
1801 "converting 3.5 filesystem to the 3.6 format");
1803 if (is_reiserfs_3_5(rs))
1804 /* put magic string of 3.6 format. 2.2 will not be able to
1805 mount this filesystem anymore */
1806 memcpy(rs->s_v1.s_magic,
1807 reiserfs_3_6_magic_string,
1809 (reiserfs_3_6_magic_string));
1811 set_sb_version(rs, REISERFS_VERSION_2);
1812 reiserfs_convert_objectid_map_v1(s);
1813 set_bit(REISERFS_3_6, &(sbi->s_properties));
1814 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1815 } else if (!silent) {
1816 reiserfs_info(s, "using 3.5.x disk format\n");
1820 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1821 errval = journal_end(&th, s, 1);
1828 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1834 /* look for files which were to be removed in previous session */
1835 finish_unfinished(s);
1837 if (old_format_only(s) && !silent) {
1838 reiserfs_info(s, "using 3.5.x disk format\n");
1841 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1847 // mark hash in super block: it could be unset. overwrite should be ok
1848 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1852 reiserfs_proc_info_init(s);
1854 init_waitqueue_head(&(sbi->s_wait));
1855 spin_lock_init(&sbi->bitmap_lock);
1860 if (jinit_done) { /* kill the commit thread, free journal ram */
1861 journal_release_error(NULL, s);
1864 reiserfs_free_bitmap_cache(s);
1865 if (SB_BUFFER_WITH_SB(s))
1866 brelse(SB_BUFFER_WITH_SB(s));
1870 for (j = 0; j < MAXQUOTAS; j++)
1876 s->s_fs_info = NULL;
1880 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1882 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1884 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1885 buf->f_bfree = sb_free_blocks(rs);
1886 buf->f_bavail = buf->f_bfree;
1887 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1888 buf->f_bsize = dentry->d_sb->s_blocksize;
1889 /* changed to accommodate gcc folks. */
1890 buf->f_type = REISERFS_SUPER_MAGIC;
1895 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1897 struct reiserfs_transaction_handle th;
1900 /* We may create quota structure so we need to reserve enough blocks */
1901 reiserfs_write_lock(inode->i_sb);
1903 journal_begin(&th, inode->i_sb,
1904 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1907 ret = dquot_initialize(inode, type);
1909 journal_end(&th, inode->i_sb,
1910 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1914 reiserfs_write_unlock(inode->i_sb);
1918 static int reiserfs_dquot_drop(struct inode *inode)
1920 struct reiserfs_transaction_handle th;
1923 /* We may delete quota structure so we need to reserve enough blocks */
1924 reiserfs_write_lock(inode->i_sb);
1926 journal_begin(&th, inode->i_sb,
1927 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1930 * We call dquot_drop() anyway to at least release references
1931 * to quota structures so that umount does not hang.
1936 ret = dquot_drop(inode);
1938 journal_end(&th, inode->i_sb,
1939 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1943 reiserfs_write_unlock(inode->i_sb);
1947 static int reiserfs_write_dquot(struct dquot *dquot)
1949 struct reiserfs_transaction_handle th;
1952 reiserfs_write_lock(dquot->dq_sb);
1954 journal_begin(&th, dquot->dq_sb,
1955 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1958 ret = dquot_commit(dquot);
1960 journal_end(&th, dquot->dq_sb,
1961 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1965 reiserfs_write_unlock(dquot->dq_sb);
1969 static int reiserfs_acquire_dquot(struct dquot *dquot)
1971 struct reiserfs_transaction_handle th;
1974 reiserfs_write_lock(dquot->dq_sb);
1976 journal_begin(&th, dquot->dq_sb,
1977 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1980 ret = dquot_acquire(dquot);
1982 journal_end(&th, dquot->dq_sb,
1983 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1987 reiserfs_write_unlock(dquot->dq_sb);
1991 static int reiserfs_release_dquot(struct dquot *dquot)
1993 struct reiserfs_transaction_handle th;
1996 reiserfs_write_lock(dquot->dq_sb);
1998 journal_begin(&th, dquot->dq_sb,
1999 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2001 /* Release dquot anyway to avoid endless cycle in dqput() */
2002 dquot_release(dquot);
2005 ret = dquot_release(dquot);
2007 journal_end(&th, dquot->dq_sb,
2008 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2012 reiserfs_write_unlock(dquot->dq_sb);
2016 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2018 /* Are we journaling quotas? */
2019 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2020 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2021 dquot_mark_dquot_dirty(dquot);
2022 return reiserfs_write_dquot(dquot);
2024 return dquot_mark_dquot_dirty(dquot);
2027 static int reiserfs_write_info(struct super_block *sb, int type)
2029 struct reiserfs_transaction_handle th;
2032 /* Data block + inode block */
2033 reiserfs_write_lock(sb);
2034 ret = journal_begin(&th, sb, 2);
2037 ret = dquot_commit_info(sb, type);
2038 err = journal_end(&th, sb, 2);
2042 reiserfs_write_unlock(sb);
2047 * Turn on quotas during mount time - we need to find the quota file and such...
2049 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2051 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2052 REISERFS_SB(sb)->s_jquota_fmt, type);
2056 * Standard function to be called on quota_on
2058 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2059 char *name, int remount)
2063 struct inode *inode;
2064 struct reiserfs_transaction_handle th;
2066 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2068 /* No more checks needed? Path and format_id are bogus anyway... */
2070 return vfs_quota_on(sb, type, format_id, name, 1);
2071 err = kern_path(name, LOOKUP_FOLLOW, &path);
2074 /* Quotafile not on the same filesystem? */
2075 if (path.mnt->mnt_sb != sb) {
2079 inode = path.dentry->d_inode;
2080 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2081 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2082 err = reiserfs_unpack(inode, NULL);
2084 reiserfs_warning(sb,
2085 "reiserfs: Unpacking tail of quota file failed"
2086 " (%d). Cannot turn on quotas.", err);
2090 mark_inode_dirty(inode);
2092 /* Journaling quota? */
2093 if (REISERFS_SB(sb)->s_qf_names[type]) {
2094 /* Quotafile not of fs root? */
2095 if (path.dentry->d_parent != sb->s_root)
2096 reiserfs_warning(sb,
2097 "reiserfs: Quota file not on filesystem root. "
2098 "Journalled quota will not work.");
2102 * When we journal data on quota file, we have to flush journal to see
2103 * all updates to the file when we bypass pagecache...
2105 if (reiserfs_file_data_log(inode)) {
2106 /* Just start temporary transaction and finish it */
2107 err = journal_begin(&th, sb, 1);
2110 err = journal_end_sync(&th, sb, 1);
2114 err = vfs_quota_on_path(sb, type, format_id, &path);
2120 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2121 * acquiring the locks... As quota files are never truncated and quota code
2122 * itself serializes the operations (and noone else should touch the files)
2123 * we don't have to be afraid of races */
2124 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2125 size_t len, loff_t off)
2127 struct inode *inode = sb_dqopt(sb)->files[type];
2128 unsigned long blk = off >> sb->s_blocksize_bits;
2129 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2131 struct buffer_head tmp_bh, *bh;
2132 loff_t i_size = i_size_read(inode);
2136 if (off + len > i_size)
2139 while (toread > 0) {
2141 sb->s_blocksize - offset <
2142 toread ? sb->s_blocksize - offset : toread;
2144 /* Quota files are without tails so we can safely use this function */
2145 reiserfs_write_lock(sb);
2146 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2147 reiserfs_write_unlock(sb);
2150 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2151 memset(data, 0, tocopy);
2153 bh = sb_bread(sb, tmp_bh.b_blocknr);
2156 memcpy(data, bh->b_data + offset, tocopy);
2167 /* Write to quotafile (we know the transaction is already started and has
2168 * enough credits) */
2169 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2170 const char *data, size_t len, loff_t off)
2172 struct inode *inode = sb_dqopt(sb)->files[type];
2173 unsigned long blk = off >> sb->s_blocksize_bits;
2174 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2175 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2176 size_t towrite = len;
2177 struct buffer_head tmp_bh, *bh;
2179 if (!current->journal_info) {
2180 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2181 " cancelled because transaction is not started.\n",
2182 (unsigned long long)off, (unsigned long long)len);
2185 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2186 while (towrite > 0) {
2187 tocopy = sb->s_blocksize - offset < towrite ?
2188 sb->s_blocksize - offset : towrite;
2190 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2193 if (offset || tocopy != sb->s_blocksize)
2194 bh = sb_bread(sb, tmp_bh.b_blocknr);
2196 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2202 memcpy(bh->b_data + offset, data, tocopy);
2203 flush_dcache_page(bh->b_page);
2204 set_buffer_uptodate(bh);
2206 reiserfs_prepare_for_journal(sb, bh, 1);
2207 journal_mark_dirty(current->journal_info, sb, bh);
2209 reiserfs_add_ordered_list(inode, bh);
2217 if (len == towrite) {
2218 mutex_unlock(&inode->i_mutex);
2221 if (inode->i_size < off + len - towrite)
2222 i_size_write(inode, off + len - towrite);
2224 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2225 mark_inode_dirty(inode);
2226 mutex_unlock(&inode->i_mutex);
2227 return len - towrite;
2232 static int get_super_block(struct file_system_type *fs_type,
2233 int flags, const char *dev_name,
2234 void *data, struct vfsmount *mnt)
2236 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2240 static int __init init_reiserfs_fs(void)
2244 if ((ret = init_inodecache())) {
2248 if ((ret = reiserfs_xattr_register_handlers()))
2249 goto failed_reiserfs_xattr_register_handlers;
2251 reiserfs_proc_info_global_init();
2252 reiserfs_proc_register_global("version",
2253 reiserfs_global_version_in_proc);
2255 ret = register_filesystem(&reiserfs_fs_type);
2261 reiserfs_xattr_unregister_handlers();
2263 failed_reiserfs_xattr_register_handlers:
2264 reiserfs_proc_unregister_global("version");
2265 reiserfs_proc_info_global_done();
2266 destroy_inodecache();
2271 static void __exit exit_reiserfs_fs(void)
2273 reiserfs_xattr_unregister_handlers();
2274 reiserfs_proc_unregister_global("version");
2275 reiserfs_proc_info_global_done();
2276 unregister_filesystem(&reiserfs_fs_type);
2277 destroy_inodecache();
2280 struct file_system_type reiserfs_fs_type = {
2281 .owner = THIS_MODULE,
2283 .get_sb = get_super_block,
2284 .kill_sb = reiserfs_kill_sb,
2285 .fs_flags = FS_REQUIRES_DEV,
2288 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2289 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2290 MODULE_LICENSE("GPL");
2292 module_init(init_reiserfs_fs);
2293 module_exit(exit_reiserfs_fs);