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/vfs.h>
26 #include <linux/mnt_namespace.h>
27 #include <linux/mount.h>
28 #include <linux/namei.h>
29 #include <linux/quotaops.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 journalled 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(struct kmem_cache * cachep, 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)
884 opt_desc_t opts[] = {
885 /* Compatibility stuff, so that -o notail for old setups still work */
886 {"tails",.arg_required = 't',.values = tails},
888 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
889 {"conv",.setmask = 1 << REISERFS_CONVERT},
890 {"attrs",.setmask = 1 << REISERFS_ATTRS},
891 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
892 #ifdef CONFIG_REISERFS_FS_XATTR
893 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
894 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
896 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
897 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
899 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
900 {"acl",.setmask = 1 << REISERFS_POSIXACL},
901 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
903 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
904 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
906 {.option_name = "nolog"},
907 {"replayonly",.setmask = 1 << REPLAYONLY},
908 {"block-allocator",.arg_required = 'a',.values = balloc},
909 {"data",.arg_required = 'd',.values = logging_mode},
910 {"barrier",.arg_required = 'b',.values = barrier_mode},
911 {"resize",.arg_required = 'r',.values = NULL},
912 {"jdev",.arg_required = 'j',.values = NULL},
913 {"nolargeio",.arg_required = 'w',.values = NULL},
914 {"commit",.arg_required = 'c',.values = NULL},
915 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
916 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
917 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
918 {"errors",.arg_required = 'e',.values = error_actions},
919 {"usrjquota",.arg_required =
920 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
921 {"grpjquota",.arg_required =
922 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
923 {"jqfmt",.arg_required = 'f',.values = NULL},
924 {.option_name = NULL}
928 if (!options || !*options)
929 /* use default configuration: create tails, journaling on, no
930 conversion to newest format */
933 for (pos = options; pos;) {
934 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
936 /* wrong option is given */
943 /* "resize=NNN" or "resize=auto" */
945 if (!strcmp(arg, "auto")) {
946 /* From JFS code, to auto-get the size. */
948 s->s_bdev->bd_inode->i_size >> s->
951 *blocks = simple_strtoul(arg, &p, 0);
953 /* NNN does not look like a number */
955 "reiserfs_parse_options: bad value %s",
964 unsigned long val = simple_strtoul(arg, &p, 0);
965 /* commit=NNN (time in seconds) */
966 if (*p != '\0' || val >= (unsigned int)-1) {
968 "reiserfs_parse_options: bad value %s",
972 *commit_max_age = (unsigned int)val;
976 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
981 if (arg && *arg && jdev_name) {
982 if (*jdev_name) { //Hm, already assigned?
984 "reiserfs_parse_options: journal device was already specified to be %s",
992 if (c == 'u' || c == 'g') {
993 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
995 if (sb_any_quota_enabled(s)) {
997 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
1000 if (*arg) { /* Some filename specified? */
1001 if (REISERFS_SB(s)->s_qf_names[qtype]
1002 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1005 "reiserfs_parse_options: %s quota file already specified.",
1009 if (strchr(arg, '/')) {
1011 "reiserfs_parse_options: quotafile must be on filesystem root.");
1014 REISERFS_SB(s)->s_qf_names[qtype] =
1015 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1016 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1018 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1021 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1022 *mount_options |= 1 << REISERFS_QUOTA;
1024 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1025 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1029 if (!strcmp(arg, "vfsold"))
1030 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1031 else if (!strcmp(arg, "vfsv0"))
1032 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1035 "reiserfs_parse_options: unknown quota format specified.");
1040 if (c == 'u' || c == 'g' || c == 'f') {
1042 "reiserfs_parse_options: journalled quota options not supported.");
1049 if (!REISERFS_SB(s)->s_jquota_fmt
1050 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1051 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1053 "reiserfs_parse_options: journalled quota format not specified.");
1056 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1057 if (!(*mount_options & (1 << REISERFS_QUOTA))
1058 && sb_any_quota_enabled(s)) {
1060 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1068 static void switch_data_mode(struct super_block *s, unsigned long mode)
1070 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1071 (1 << REISERFS_DATA_ORDERED) |
1072 (1 << REISERFS_DATA_WRITEBACK));
1073 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1076 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1078 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1079 if (!reiserfs_data_log(s)) {
1080 switch_data_mode(s, REISERFS_DATA_LOG);
1081 reiserfs_info(s, "switching to journaled data mode\n");
1083 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1084 if (!reiserfs_data_ordered(s)) {
1085 switch_data_mode(s, REISERFS_DATA_ORDERED);
1086 reiserfs_info(s, "switching to ordered data mode\n");
1088 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1089 if (!reiserfs_data_writeback(s)) {
1090 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1091 reiserfs_info(s, "switching to writeback data mode\n");
1096 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1098 int flush = (1 << REISERFS_BARRIER_FLUSH);
1099 int none = (1 << REISERFS_BARRIER_NONE);
1100 int all_barrier = flush | none;
1102 if (bits & all_barrier) {
1103 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1105 REISERFS_SB(s)->s_mount_opt |= flush;
1106 printk("reiserfs: enabling write barrier flush mode\n");
1107 } else if (bits & none) {
1108 REISERFS_SB(s)->s_mount_opt |= none;
1109 printk("reiserfs: write barriers turned off\n");
1114 static void handle_attrs(struct super_block *s)
1116 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1118 if (reiserfs_attrs(s)) {
1119 if (old_format_only(s)) {
1121 "reiserfs: cannot support attributes on 3.5.x disk format");
1122 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1125 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1127 "reiserfs: cannot support attributes until flag is set in super-block");
1128 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1133 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1135 struct reiserfs_super_block *rs;
1136 struct reiserfs_transaction_handle th;
1137 unsigned long blocks;
1138 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1139 unsigned long safe_mask = 0;
1140 unsigned int commit_max_age = (unsigned int)-1;
1141 struct reiserfs_journal *journal = SB_JOURNAL(s);
1142 char *new_opts = kstrdup(arg, GFP_KERNEL);
1148 rs = SB_DISK_SUPER_BLOCK(s);
1150 if (!reiserfs_parse_options
1151 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1153 for (i = 0; i < MAXQUOTAS; i++) {
1154 kfree(REISERFS_SB(s)->s_qf_names[i]);
1155 REISERFS_SB(s)->s_qf_names[i] = NULL;
1164 /* Add options that are safe here */
1165 safe_mask |= 1 << REISERFS_SMALLTAIL;
1166 safe_mask |= 1 << REISERFS_LARGETAIL;
1167 safe_mask |= 1 << REISERFS_NO_BORDER;
1168 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1169 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1170 safe_mask |= 1 << REISERFS_TEST4;
1171 safe_mask |= 1 << REISERFS_ATTRS;
1172 safe_mask |= 1 << REISERFS_XATTRS_USER;
1173 safe_mask |= 1 << REISERFS_POSIXACL;
1174 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1175 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1176 safe_mask |= 1 << REISERFS_ERROR_RO;
1177 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1178 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1179 safe_mask |= 1 << REISERFS_QUOTA;
1181 /* Update the bitmask, taking care to keep
1182 * the bits we're not allowed to change here */
1183 REISERFS_SB(s)->s_mount_opt =
1185 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1187 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1188 journal->j_max_commit_age = commit_max_age;
1189 journal->j_max_trans_age = commit_max_age;
1190 } else if (commit_max_age == 0) {
1191 /* 0 means restore defaults. */
1192 journal->j_max_commit_age = journal->j_default_max_commit_age;
1193 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1197 err = reiserfs_resize(s, blocks);
1202 if (*mount_flags & MS_RDONLY) {
1203 reiserfs_xattr_init(s, *mount_flags);
1204 /* remount read-only */
1205 if (s->s_flags & MS_RDONLY)
1206 /* it is read-only already */
1208 /* try to remount file system with read-only permissions */
1209 if (sb_umount_state(rs) == REISERFS_VALID_FS
1210 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1214 err = journal_begin(&th, s, 10);
1218 /* Mounting a rw partition read-only. */
1219 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1220 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1221 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1223 /* remount read-write */
1224 if (!(s->s_flags & MS_RDONLY)) {
1225 reiserfs_xattr_init(s, *mount_flags);
1226 goto out_ok; /* We are read-write already */
1229 if (reiserfs_is_journal_aborted(journal)) {
1230 err = journal->j_errno;
1234 handle_data_mode(s, mount_options);
1235 handle_barrier_mode(s, mount_options);
1236 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1237 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1238 err = journal_begin(&th, s, 10);
1242 /* Mount a partition which is read-only, read-write */
1243 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1244 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1245 s->s_flags &= ~MS_RDONLY;
1246 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1247 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1248 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1249 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1251 /* this will force a full flush of all journal lists */
1252 SB_JOURNAL(s)->j_must_wait = 1;
1253 err = journal_end(&th, s, 10);
1258 if (!(*mount_flags & MS_RDONLY)) {
1259 finish_unfinished(s);
1260 reiserfs_xattr_init(s, *mount_flags);
1264 kfree(s->s_options);
1265 s->s_options = new_opts;
1273 static int read_super_block(struct super_block *s, int offset)
1275 struct buffer_head *bh;
1276 struct reiserfs_super_block *rs;
1279 bh = sb_bread(s, offset / s->s_blocksize);
1281 reiserfs_warning(s, "sh-2006: read_super_block: "
1282 "bread failed (dev %s, block %lu, size %lu)",
1283 reiserfs_bdevname(s), offset / s->s_blocksize,
1288 rs = (struct reiserfs_super_block *)bh->b_data;
1289 if (!is_any_reiserfs_magic_string(rs)) {
1294 // ok, reiserfs signature (old or new) found in at the given offset
1296 fs_blocksize = sb_blocksize(rs);
1298 sb_set_blocksize(s, fs_blocksize);
1300 bh = sb_bread(s, offset / s->s_blocksize);
1302 reiserfs_warning(s, "sh-2007: read_super_block: "
1303 "bread failed (dev %s, block %lu, size %lu)\n",
1304 reiserfs_bdevname(s), offset / s->s_blocksize,
1309 rs = (struct reiserfs_super_block *)bh->b_data;
1310 if (sb_blocksize(rs) != s->s_blocksize) {
1311 reiserfs_warning(s, "sh-2011: read_super_block: "
1312 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1313 reiserfs_bdevname(s),
1314 (unsigned long long)bh->b_blocknr,
1320 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1323 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1324 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1325 "get newer reiserfsprogs package");
1329 SB_BUFFER_WITH_SB(s) = bh;
1330 SB_DISK_SUPER_BLOCK(s) = rs;
1332 if (is_reiserfs_jr(rs)) {
1333 /* magic is of non-standard journal filesystem, look at s_version to
1334 find which format is in use */
1335 if (sb_version(rs) == REISERFS_VERSION_2)
1337 "read_super_block: found reiserfs format \"3.6\""
1338 " with non-standard journal");
1339 else if (sb_version(rs) == REISERFS_VERSION_1)
1341 "read_super_block: found reiserfs format \"3.5\""
1342 " with non-standard journal");
1345 "sh-2012: read_super_block: found unknown "
1346 "format \"%u\" of reiserfs with non-standard magic",
1351 /* s_version of standard format may contain incorrect information,
1352 so we just look at the magic string */
1354 "found reiserfs format \"%s\" with standard journal\n",
1355 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1357 s->s_op = &reiserfs_sops;
1358 s->s_export_op = &reiserfs_export_ops;
1360 s->s_qcop = &reiserfs_qctl_operations;
1361 s->dq_op = &reiserfs_quota_operations;
1364 /* new format is limited by the 32 bit wide i_blocks field, want to
1365 ** be one full block below that.
1367 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1371 /* after journal replay, reread all bitmap and super blocks */
1372 static int reread_meta_blocks(struct super_block *s)
1374 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1375 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1376 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1378 "reread_meta_blocks, error reading the super");
1385 /////////////////////////////////////////////////////
1386 // hash detection stuff
1388 // if root directory is empty - we set default - Yura's - hash and
1390 // FIXME: we look for only one name in a directory. If tea and yura
1391 // bith have the same value - we ask user to send report to the
1393 static __u32 find_hash_out(struct super_block *s)
1396 struct inode *inode;
1398 INITIALIZE_PATH(path);
1399 struct reiserfs_dir_entry de;
1400 __u32 hash = DEFAULT_HASH;
1402 inode = s->s_root->d_inode;
1404 do { // Some serious "goto"-hater was there ;)
1405 u32 teahash, r5hash, yurahash;
1407 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1408 retval = search_by_entry_key(s, &key, &path, &de);
1409 if (retval == IO_ERROR) {
1413 if (retval == NAME_NOT_FOUND)
1415 set_de_name_and_namelen(&de);
1416 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1417 /* allow override in this case */
1418 if (reiserfs_rupasov_hash(s)) {
1421 reiserfs_warning(s, "FS seems to be empty, autodetect "
1422 "is using the default hash");
1425 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1426 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1427 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1428 if (((teahash == r5hash)
1430 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1431 == r5hash)) || ((teahash == yurahash)
1433 GET_HASH_VALUE(deh_offset
1438 || ((r5hash == yurahash)
1440 GET_HASH_VALUE(deh_offset
1441 (&(de.de_deh[de.de_entry_num])))))) {
1443 "Unable to automatically detect hash function. "
1444 "Please mount with -o hash={tea,rupasov,r5}",
1445 reiserfs_bdevname(s));
1449 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1452 else if (GET_HASH_VALUE
1453 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1455 else if (GET_HASH_VALUE
1456 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1459 reiserfs_warning(s, "Unrecognised hash function");
1468 // finds out which hash names are sorted with
1469 static int what_hash(struct super_block *s)
1473 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1475 /* reiserfs_hash_detect() == true if any of the hash mount options
1476 ** were used. We must check them to make sure the user isn't
1477 ** using a bad hash value
1479 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1480 code = find_hash_out(s);
1482 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1483 /* detection has found the hash, and we must check against the
1486 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1487 reiserfs_warning(s, "Error, %s hash detected, "
1488 "unable to force rupasov hash",
1489 reiserfs_hashname(code));
1491 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1492 reiserfs_warning(s, "Error, %s hash detected, "
1493 "unable to force tea hash",
1494 reiserfs_hashname(code));
1496 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1497 reiserfs_warning(s, "Error, %s hash detected, "
1498 "unable to force r5 hash",
1499 reiserfs_hashname(code));
1503 /* find_hash_out was not called or could not determine the hash */
1504 if (reiserfs_rupasov_hash(s)) {
1506 } else if (reiserfs_tea_hash(s)) {
1508 } else if (reiserfs_r5_hash(s)) {
1513 /* if we are mounted RW, and we have a new valid hash code, update
1516 if (code != UNSET_HASH &&
1517 !(s->s_flags & MS_RDONLY) &&
1518 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1519 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1524 // return pointer to appropriate function
1525 static hashf_t hash_function(struct super_block *s)
1527 switch (what_hash(s)) {
1529 reiserfs_info(s, "Using tea hash to sort names\n");
1532 reiserfs_info(s, "Using rupasov hash to sort names\n");
1535 reiserfs_info(s, "Using r5 hash to sort names\n");
1541 // this is used to set up correct value for old partitions
1542 static int function2code(hashf_t func)
1544 if (func == keyed_hash)
1546 if (func == yura_hash)
1548 if (func == r5_hash)
1551 BUG(); // should never happen
1556 #define SWARN(silent, s, ...) \
1558 reiserfs_warning (s, __VA_ARGS__)
1560 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1562 struct inode *root_inode;
1563 struct reiserfs_transaction_handle th;
1565 unsigned long blocks;
1566 unsigned int commit_max_age = 0;
1568 struct reiserfs_iget_args args;
1569 struct reiserfs_super_block *rs;
1571 struct reiserfs_sb_info *sbi;
1572 int errval = -EINVAL;
1574 save_mount_options(s, data);
1576 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1582 /* Set default values for options: non-aggressive tails, RO on errors */
1583 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1584 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1585 /* no preallocation minimum, be smart in
1586 reiserfs_file_write instead */
1587 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1588 /* Preallocate by 16 blocks (17-1) at once */
1589 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1590 #ifdef CONFIG_REISERFS_FS_XATTR
1591 /* Initialize the rwsem for xattr dir */
1592 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1594 /* setup default block allocator options */
1595 reiserfs_init_alloc_options(s);
1598 if (reiserfs_parse_options
1599 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1600 &commit_max_age) == 0) {
1605 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1606 "for remount only");
1610 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1611 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1613 /* try new format (64-th 1k block), which can contain reiserfs super block */
1614 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1616 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1617 reiserfs_bdevname(s));
1621 rs = SB_DISK_SUPER_BLOCK(s);
1622 /* Let's do basic sanity check to verify that underlying device is not
1623 smaller than the filesystem. If the check fails then abort and scream,
1624 because bad stuff will happen otherwise. */
1625 if (s->s_bdev && s->s_bdev->bd_inode
1626 && i_size_read(s->s_bdev->bd_inode) <
1627 sb_block_count(rs) * sb_blocksize(rs)) {
1629 "Filesystem on %s cannot be mounted because it is bigger than the device",
1630 reiserfs_bdevname(s));
1632 "You may need to run fsck or increase size of your LVM partition");
1634 "Or may be you forgot to reboot after fdisk when it told you to");
1638 sbi->s_mount_state = SB_REISERFS_STATE(s);
1639 sbi->s_mount_state = REISERFS_VALID_FS;
1641 if ((errval = reiserfs_init_bitmap_cache(s))) {
1643 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1647 #ifdef CONFIG_REISERFS_CHECK
1648 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1649 SWARN(silent, s, "- it is slow mode for debugging.");
1652 /* make data=ordered the default */
1653 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1654 !reiserfs_data_writeback(s)) {
1655 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1658 if (reiserfs_data_log(s)) {
1659 reiserfs_info(s, "using journaled data mode\n");
1660 } else if (reiserfs_data_ordered(s)) {
1661 reiserfs_info(s, "using ordered data mode\n");
1663 reiserfs_info(s, "using writeback data mode\n");
1665 if (reiserfs_barrier_flush(s)) {
1666 printk("reiserfs: using flush barriers\n");
1668 // set_device_ro(s->s_dev, 1) ;
1669 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1671 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1674 jinit_done = 1; /* once this is set, journal_release must be called
1675 ** if we error out of the mount
1678 if (reread_meta_blocks(s)) {
1680 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1687 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1689 "clm-7000: Detected readonly device, marking FS readonly");
1690 s->s_flags |= MS_RDONLY;
1692 args.objectid = REISERFS_ROOT_OBJECTID;
1693 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1695 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1696 reiserfs_init_locked_inode, (void *)(&args));
1699 "jmacd-10: reiserfs_fill_super: get root inode failed");
1703 if (root_inode->i_state & I_NEW) {
1704 reiserfs_read_locked_inode(root_inode, &args);
1705 unlock_new_inode(root_inode);
1708 s->s_root = d_alloc_root(root_inode);
1713 // define and initialize hash function
1714 sbi->s_hash_function = hash_function(s);
1715 if (sbi->s_hash_function == NULL) {
1721 if (is_reiserfs_3_5(rs)
1722 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1723 set_bit(REISERFS_3_5, &(sbi->s_properties));
1724 else if (old_format)
1725 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1727 set_bit(REISERFS_3_6, &(sbi->s_properties));
1729 if (!(s->s_flags & MS_RDONLY)) {
1731 errval = journal_begin(&th, s, 1);
1737 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1739 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1740 set_sb_fs_state(rs, 0);
1742 /* Clear out s_bmap_nr if it would wrap. We can handle this
1743 * case, but older revisions can't. This will cause the
1744 * file system to fail mount on those older implementations,
1745 * avoiding corruption. -jeffm */
1746 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1747 sb_bmap_nr(rs) != 0) {
1748 reiserfs_warning(s, "super-2030: This file system "
1749 "claims to use %u bitmap blocks in "
1750 "its super block, but requires %u. "
1751 "Clearing to zero.", sb_bmap_nr(rs),
1752 reiserfs_bmap_count(s));
1754 set_sb_bmap_nr(rs, 0);
1757 if (old_format_only(s)) {
1758 /* filesystem of format 3.5 either with standard or non-standard
1760 if (convert_reiserfs(s)) {
1761 /* and -o conv is given */
1764 "converting 3.5 filesystem to the 3.6 format");
1766 if (is_reiserfs_3_5(rs))
1767 /* put magic string of 3.6 format. 2.2 will not be able to
1768 mount this filesystem anymore */
1769 memcpy(rs->s_v1.s_magic,
1770 reiserfs_3_6_magic_string,
1772 (reiserfs_3_6_magic_string));
1774 set_sb_version(rs, REISERFS_VERSION_2);
1775 reiserfs_convert_objectid_map_v1(s);
1776 set_bit(REISERFS_3_6, &(sbi->s_properties));
1777 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1778 } else if (!silent) {
1779 reiserfs_info(s, "using 3.5.x disk format\n");
1783 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1784 errval = journal_end(&th, s, 1);
1791 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1797 /* look for files which were to be removed in previous session */
1798 finish_unfinished(s);
1800 if (old_format_only(s) && !silent) {
1801 reiserfs_info(s, "using 3.5.x disk format\n");
1804 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1810 // mark hash in super block: it could be unset. overwrite should be ok
1811 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1815 reiserfs_proc_info_init(s);
1817 init_waitqueue_head(&(sbi->s_wait));
1818 spin_lock_init(&sbi->bitmap_lock);
1823 if (jinit_done) { /* kill the commit thread, free journal ram */
1824 journal_release_error(NULL, s);
1827 reiserfs_free_bitmap_cache(s);
1828 if (SB_BUFFER_WITH_SB(s))
1829 brelse(SB_BUFFER_WITH_SB(s));
1833 for (j = 0; j < MAXQUOTAS; j++) {
1834 kfree(sbi->s_qf_names[j]);
1835 sbi->s_qf_names[j] = NULL;
1841 s->s_fs_info = NULL;
1845 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1847 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1849 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1850 buf->f_bfree = sb_free_blocks(rs);
1851 buf->f_bavail = buf->f_bfree;
1852 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1853 buf->f_bsize = dentry->d_sb->s_blocksize;
1854 /* changed to accommodate gcc folks. */
1855 buf->f_type = REISERFS_SUPER_MAGIC;
1860 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1862 struct reiserfs_transaction_handle th;
1865 /* We may create quota structure so we need to reserve enough blocks */
1866 reiserfs_write_lock(inode->i_sb);
1868 journal_begin(&th, inode->i_sb,
1869 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1872 ret = dquot_initialize(inode, type);
1874 journal_end(&th, inode->i_sb,
1875 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1879 reiserfs_write_unlock(inode->i_sb);
1883 static int reiserfs_dquot_drop(struct inode *inode)
1885 struct reiserfs_transaction_handle th;
1888 /* We may delete quota structure so we need to reserve enough blocks */
1889 reiserfs_write_lock(inode->i_sb);
1891 journal_begin(&th, inode->i_sb,
1892 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1895 * We call dquot_drop() anyway to at least release references
1896 * to quota structures so that umount does not hang.
1901 ret = dquot_drop(inode);
1903 journal_end(&th, inode->i_sb,
1904 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1908 reiserfs_write_unlock(inode->i_sb);
1912 static int reiserfs_write_dquot(struct dquot *dquot)
1914 struct reiserfs_transaction_handle th;
1917 reiserfs_write_lock(dquot->dq_sb);
1919 journal_begin(&th, dquot->dq_sb,
1920 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1923 ret = dquot_commit(dquot);
1925 journal_end(&th, dquot->dq_sb,
1926 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1930 reiserfs_write_unlock(dquot->dq_sb);
1934 static int reiserfs_acquire_dquot(struct dquot *dquot)
1936 struct reiserfs_transaction_handle th;
1939 reiserfs_write_lock(dquot->dq_sb);
1941 journal_begin(&th, dquot->dq_sb,
1942 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1945 ret = dquot_acquire(dquot);
1947 journal_end(&th, dquot->dq_sb,
1948 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1952 reiserfs_write_unlock(dquot->dq_sb);
1956 static int reiserfs_release_dquot(struct dquot *dquot)
1958 struct reiserfs_transaction_handle th;
1961 reiserfs_write_lock(dquot->dq_sb);
1963 journal_begin(&th, dquot->dq_sb,
1964 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1966 /* Release dquot anyway to avoid endless cycle in dqput() */
1967 dquot_release(dquot);
1970 ret = dquot_release(dquot);
1972 journal_end(&th, dquot->dq_sb,
1973 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1977 reiserfs_write_unlock(dquot->dq_sb);
1981 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1983 /* Are we journalling quotas? */
1984 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1985 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1986 dquot_mark_dquot_dirty(dquot);
1987 return reiserfs_write_dquot(dquot);
1989 return dquot_mark_dquot_dirty(dquot);
1992 static int reiserfs_write_info(struct super_block *sb, int type)
1994 struct reiserfs_transaction_handle th;
1997 /* Data block + inode block */
1998 reiserfs_write_lock(sb);
1999 ret = journal_begin(&th, sb, 2);
2002 ret = dquot_commit_info(sb, type);
2003 err = journal_end(&th, sb, 2);
2007 reiserfs_write_unlock(sb);
2012 * Turn on quotas during mount time - we need to find the quota file and such...
2014 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2016 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2017 REISERFS_SB(sb)->s_jquota_fmt, type);
2021 * Standard function to be called on quota_on
2023 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2024 char *path, int remount)
2027 struct nameidata nd;
2028 struct inode *inode;
2029 struct reiserfs_transaction_handle th;
2031 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2033 /* No more checks needed? Path and format_id are bogus anyway... */
2035 return vfs_quota_on(sb, type, format_id, path, 1);
2036 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2039 /* Quotafile not on the same filesystem? */
2040 if (nd.path.mnt->mnt_sb != sb) {
2044 inode = nd.path.dentry->d_inode;
2045 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2046 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2047 err = reiserfs_unpack(inode, NULL);
2049 reiserfs_warning(sb,
2050 "reiserfs: Unpacking tail of quota file failed"
2051 " (%d). Cannot turn on quotas.", err);
2055 mark_inode_dirty(inode);
2057 /* Journaling quota? */
2058 if (REISERFS_SB(sb)->s_qf_names[type]) {
2059 /* Quotafile not of fs root? */
2060 if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
2061 reiserfs_warning(sb,
2062 "reiserfs: Quota file not on filesystem root. "
2063 "Journalled quota will not work.");
2067 * When we journal data on quota file, we have to flush journal to see
2068 * all updates to the file when we bypass pagecache...
2070 if (reiserfs_file_data_log(inode)) {
2071 /* Just start temporary transaction and finish it */
2072 err = journal_begin(&th, sb, 1);
2075 err = journal_end_sync(&th, sb, 1);
2080 return vfs_quota_on(sb, type, format_id, path, 0);
2083 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2084 * acquiring the locks... As quota files are never truncated and quota code
2085 * itself serializes the operations (and noone else should touch the files)
2086 * we don't have to be afraid of races */
2087 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2088 size_t len, loff_t off)
2090 struct inode *inode = sb_dqopt(sb)->files[type];
2091 unsigned long blk = off >> sb->s_blocksize_bits;
2092 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2094 struct buffer_head tmp_bh, *bh;
2095 loff_t i_size = i_size_read(inode);
2099 if (off + len > i_size)
2102 while (toread > 0) {
2104 sb->s_blocksize - offset <
2105 toread ? sb->s_blocksize - offset : toread;
2107 /* Quota files are without tails so we can safely use this function */
2108 reiserfs_write_lock(sb);
2109 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2110 reiserfs_write_unlock(sb);
2113 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2114 memset(data, 0, tocopy);
2116 bh = sb_bread(sb, tmp_bh.b_blocknr);
2119 memcpy(data, bh->b_data + offset, tocopy);
2130 /* Write to quotafile (we know the transaction is already started and has
2131 * enough credits) */
2132 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2133 const char *data, size_t len, loff_t off)
2135 struct inode *inode = sb_dqopt(sb)->files[type];
2136 unsigned long blk = off >> sb->s_blocksize_bits;
2137 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2138 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2139 size_t towrite = len;
2140 struct buffer_head tmp_bh, *bh;
2142 if (!current->journal_info) {
2143 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2144 " cancelled because transaction is not started.\n",
2145 (unsigned long long)off, (unsigned long long)len);
2148 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2149 while (towrite > 0) {
2150 tocopy = sb->s_blocksize - offset < towrite ?
2151 sb->s_blocksize - offset : towrite;
2153 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2156 if (offset || tocopy != sb->s_blocksize)
2157 bh = sb_bread(sb, tmp_bh.b_blocknr);
2159 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2165 memcpy(bh->b_data + offset, data, tocopy);
2166 flush_dcache_page(bh->b_page);
2167 set_buffer_uptodate(bh);
2169 reiserfs_prepare_for_journal(sb, bh, 1);
2170 journal_mark_dirty(current->journal_info, sb, bh);
2172 reiserfs_add_ordered_list(inode, bh);
2180 if (len == towrite) {
2181 mutex_unlock(&inode->i_mutex);
2184 if (inode->i_size < off + len - towrite)
2185 i_size_write(inode, off + len - towrite);
2187 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2188 mark_inode_dirty(inode);
2189 mutex_unlock(&inode->i_mutex);
2190 return len - towrite;
2195 static int get_super_block(struct file_system_type *fs_type,
2196 int flags, const char *dev_name,
2197 void *data, struct vfsmount *mnt)
2199 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2203 static int __init init_reiserfs_fs(void)
2207 if ((ret = init_inodecache())) {
2211 if ((ret = reiserfs_xattr_register_handlers()))
2212 goto failed_reiserfs_xattr_register_handlers;
2214 reiserfs_proc_info_global_init();
2215 reiserfs_proc_register_global("version",
2216 reiserfs_global_version_in_proc);
2218 ret = register_filesystem(&reiserfs_fs_type);
2224 reiserfs_xattr_unregister_handlers();
2226 failed_reiserfs_xattr_register_handlers:
2227 reiserfs_proc_unregister_global("version");
2228 reiserfs_proc_info_global_done();
2229 destroy_inodecache();
2234 static void __exit exit_reiserfs_fs(void)
2236 reiserfs_xattr_unregister_handlers();
2237 reiserfs_proc_unregister_global("version");
2238 reiserfs_proc_info_global_done();
2239 unregister_filesystem(&reiserfs_fs_type);
2240 destroy_inodecache();
2243 struct file_system_type reiserfs_fs_type = {
2244 .owner = THIS_MODULE,
2246 .get_sb = get_super_block,
2247 .kill_sb = reiserfs_kill_sb,
2248 .fs_flags = FS_REQUIRES_DEV,
2251 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2252 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2253 MODULE_LICENSE("GPL");
2255 module_init(init_reiserfs_fs);
2256 module_exit(exit_reiserfs_fs);