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>
30 #include <linux/crc32.h>
32 struct file_system_type reiserfs_fs_type;
34 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
38 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
40 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen(reiserfs_3_5_magic_string));
44 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
46 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
47 strlen(reiserfs_3_6_magic_string));
50 int is_reiserfs_jr(struct reiserfs_super_block *rs)
52 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
53 strlen(reiserfs_jr_magic_string));
56 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
58 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
62 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
63 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
65 static int reiserfs_sync_fs(struct super_block *s, int wait)
67 struct reiserfs_transaction_handle th;
69 reiserfs_write_lock(s);
70 if (!journal_begin(&th, s, 1))
71 if (!journal_end_sync(&th, s, 1))
72 reiserfs_flush_old_commits(s);
73 s->s_dirt = 0; /* Even if it's not true.
74 * We'll loop forever in sync_supers otherwise */
75 reiserfs_write_unlock(s);
79 static void reiserfs_write_super(struct super_block *s)
81 reiserfs_sync_fs(s, 1);
84 static int reiserfs_freeze(struct super_block *s)
86 struct reiserfs_transaction_handle th;
87 reiserfs_write_lock(s);
88 if (!(s->s_flags & MS_RDONLY)) {
89 int err = journal_begin(&th, s, 1);
91 reiserfs_block_writes(&th);
93 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
95 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
96 reiserfs_block_writes(&th);
97 journal_end_sync(&th, s, 1);
101 reiserfs_write_unlock(s);
105 static int reiserfs_unfreeze(struct super_block *s)
107 reiserfs_allow_writes(s);
111 extern const struct in_core_key MAX_IN_CORE_KEY;
113 /* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
120 static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
123 struct reiserfs_transaction_handle th;
126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
131 reiserfs_delete_solid_item(&th, NULL, key);
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
140 static int reiserfs_quota_on_mount(struct super_block *, int);
143 /* look for uncompleted unlinks and truncates and complete them */
144 static int finish_unfinished(struct super_block *s)
146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
148 struct reiserfs_key save_link_key, last_inode_key;
150 struct item_head *ih;
151 struct buffer_head *bh;
162 /* compose key to look for "save" links */
163 max_cpu_key.version = KEY_FORMAT_3_5;
164 max_cpu_key.on_disk_key.k_dir_id = ~0U;
165 max_cpu_key.on_disk_key.k_objectid = ~0U;
166 set_cpu_key_k_offset(&max_cpu_key, ~0U);
167 max_cpu_key.key_length = 3;
169 memset(&last_inode_key, 0, sizeof(last_inode_key));
172 /* Needed for iput() to work correctly and not trash data */
173 if (s->s_flags & MS_ACTIVE) {
177 s->s_flags |= MS_ACTIVE;
179 /* Turn on quotas so that they are updated correctly */
180 for (i = 0; i < MAXQUOTAS; i++) {
181 if (REISERFS_SB(s)->s_qf_names[i]) {
182 int ret = reiserfs_quota_on_mount(s, i);
184 reiserfs_warning(s, "reiserfs-2500",
185 "cannot turn on journaled "
186 "quota: error %d", ret);
192 REISERFS_SB(s)->s_is_unlinked_ok = 1;
194 retval = search_item(s, &max_cpu_key, &path);
195 if (retval != ITEM_NOT_FOUND) {
196 reiserfs_error(s, "vs-2140",
197 "search_by_key returned %d", retval);
201 bh = get_last_bh(&path);
202 item_pos = get_item_pos(&path);
203 if (item_pos != B_NR_ITEMS(bh)) {
204 reiserfs_warning(s, "vs-2060",
205 "wrong position found");
209 ih = B_N_PITEM_HEAD(bh, item_pos);
211 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
212 /* there are no "save" links anymore */
215 save_link_key = ih->ih_key;
216 if (is_indirect_le_ih(ih))
221 /* reiserfs_iget needs k_dirid and k_objectid only */
222 item = B_I_PITEM(bh, ih);
223 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
224 obj_key.on_disk_key.k_objectid =
225 le32_to_cpu(ih->ih_key.k_objectid);
226 obj_key.on_disk_key.k_offset = 0;
227 obj_key.on_disk_key.k_type = 0;
231 inode = reiserfs_iget(s, &obj_key);
233 /* the unlink almost completed, it just did not manage to remove
234 "save" link and release objectid */
235 reiserfs_warning(s, "vs-2180", "iget failed for %K",
237 retval = remove_save_link_only(s, &save_link_key, 1);
241 if (!truncate && inode->i_nlink) {
242 /* file is not unlinked */
243 reiserfs_warning(s, "vs-2185",
244 "file %K is not unlinked",
246 retval = remove_save_link_only(s, &save_link_key, 0);
251 if (truncate && S_ISDIR(inode->i_mode)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
256 reiserfs_warning(s, "green-2101",
257 "impossible truncate on a "
258 "directory %k. Please report",
260 retval = remove_save_link_only(s, &save_link_key, 0);
267 REISERFS_I(inode)->i_flags |=
268 i_link_saved_truncate_mask;
269 /* not completed truncate found. New size was committed together
271 reiserfs_info(s, "Truncating %k to %Ld ..",
272 INODE_PKEY(inode), inode->i_size);
273 reiserfs_truncate_file(inode,
275 /*don't update modification time */
277 retval = remove_save_link(inode, truncate);
279 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
280 /* not completed unlink (rmdir) found */
281 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
282 if (memcmp(&last_inode_key, INODE_PKEY(inode),
283 sizeof(last_inode_key))){
284 last_inode_key = *INODE_PKEY(inode);
285 /* removal gets completed in iput */
288 reiserfs_warning(s, "super-2189", "Dead loop "
289 "in finish_unfinished "
290 "detected, just remove "
292 retval = remove_save_link_only(s,
301 REISERFS_SB(s)->s_is_unlinked_ok = 0;
304 /* Turn quotas off */
305 for (i = 0; i < MAXQUOTAS; i++) {
306 if (sb_dqopt(s)->files[i])
307 vfs_quota_off(s, i, 0);
310 /* Restore the flag back */
311 s->s_flags &= ~MS_ACTIVE;
315 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
316 "Completed\n", done);
320 /* to protect file being unlinked from getting lost we "safe" link files
321 being unlinked. This link will be deleted in the same transaction with last
322 item of file. mounting the filesystem we scan all these links and remove
323 files which almost got lost */
324 void add_save_link(struct reiserfs_transaction_handle *th,
325 struct inode *inode, int truncate)
327 INITIALIZE_PATH(path);
333 BUG_ON(!th->t_trans_id);
335 /* file can only get one "save link" of each kind */
337 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
338 "saved link already exists for truncated inode %lx",
341 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
342 "saved link already exists for unlinked inode %lx",
345 /* setup key of "save" link */
346 key.version = KEY_FORMAT_3_5;
347 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
348 key.on_disk_key.k_objectid = inode->i_ino;
350 /* unlink, rmdir, rename */
351 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
352 set_cpu_key_k_type(&key, TYPE_DIRECT);
354 /* item head of "safe" link */
355 make_le_item_head(&ih, &key, key.version,
356 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
357 4 /*length */ , 0xffff /*free space */ );
360 if (S_ISDIR(inode->i_mode))
361 reiserfs_warning(inode->i_sb, "green-2102",
362 "Adding a truncate savelink for "
363 "a directory %k! Please report",
365 set_cpu_key_k_offset(&key, 1);
366 set_cpu_key_k_type(&key, TYPE_INDIRECT);
368 /* item head of "safe" link */
369 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
370 4 /*length */ , 0 /*free space */ );
374 /* look for its place in the tree */
375 retval = search_item(inode->i_sb, &key, &path);
376 if (retval != ITEM_NOT_FOUND) {
377 if (retval != -ENOSPC)
378 reiserfs_error(inode->i_sb, "vs-2100",
379 "search_by_key (%K) returned %d", &key,
385 /* body of "save" link */
386 link = INODE_PKEY(inode)->k_dir_id;
388 /* put "save" link inot tree, don't charge quota to anyone */
390 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
392 if (retval != -ENOSPC)
393 reiserfs_error(inode->i_sb, "vs-2120",
394 "insert_item returned %d", retval);
397 REISERFS_I(inode)->i_flags |=
398 i_link_saved_truncate_mask;
400 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
404 /* this opens transaction unlike add_save_link */
405 int remove_save_link(struct inode *inode, int truncate)
407 struct reiserfs_transaction_handle th;
408 struct reiserfs_key key;
411 /* we are going to do one balancing only */
412 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
416 /* setup key of "save" link */
417 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
418 key.k_objectid = INODE_PKEY(inode)->k_objectid;
420 /* unlink, rmdir, rename */
421 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
422 1 + inode->i_sb->s_blocksize);
423 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
426 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
427 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
431 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
433 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
434 /* don't take quota bytes from anywhere */
435 reiserfs_delete_solid_item(&th, NULL, &key);
437 reiserfs_release_objectid(&th, inode->i_ino);
438 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
440 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
442 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
445 static void reiserfs_kill_sb(struct super_block *s)
447 if (REISERFS_SB(s)) {
448 if (REISERFS_SB(s)->xattr_root) {
449 d_invalidate(REISERFS_SB(s)->xattr_root);
450 dput(REISERFS_SB(s)->xattr_root);
451 REISERFS_SB(s)->xattr_root = NULL;
453 if (REISERFS_SB(s)->priv_root) {
454 d_invalidate(REISERFS_SB(s)->priv_root);
455 dput(REISERFS_SB(s)->priv_root);
456 REISERFS_SB(s)->priv_root = NULL;
463 static void reiserfs_put_super(struct super_block *s)
465 struct reiserfs_transaction_handle th;
469 reiserfs_write_super(s);
471 /* change file system state to current state if it was mounted with read-write permissions */
472 if (!(s->s_flags & MS_RDONLY)) {
473 if (!journal_begin(&th, s, 10)) {
474 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
476 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
477 REISERFS_SB(s)->s_mount_state);
478 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
482 /* note, journal_release checks for readonly mount, and can decide not
483 ** to do a journal_end
485 journal_release(&th, s);
487 reiserfs_free_bitmap_cache(s);
489 brelse(SB_BUFFER_WITH_SB(s));
493 if (REISERFS_SB(s)->reserved_blocks != 0) {
494 reiserfs_warning(s, "green-2005", "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, "clm-6006",
561 "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 .freeze_fs = reiserfs_freeze,
617 .unfreeze_fs = reiserfs_unfreeze,
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_write_dquot(struct dquot *);
631 static int reiserfs_acquire_dquot(struct dquot *);
632 static int reiserfs_release_dquot(struct dquot *);
633 static int reiserfs_mark_dquot_dirty(struct dquot *);
634 static int reiserfs_write_info(struct super_block *, int);
635 static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
637 static struct dquot_operations reiserfs_quota_operations = {
638 .initialize = dquot_initialize,
640 .alloc_space = dquot_alloc_space,
641 .alloc_inode = dquot_alloc_inode,
642 .free_space = dquot_free_space,
643 .free_inode = dquot_free_inode,
644 .transfer = dquot_transfer,
645 .write_dquot = reiserfs_write_dquot,
646 .acquire_dquot = reiserfs_acquire_dquot,
647 .release_dquot = reiserfs_release_dquot,
648 .mark_dirty = reiserfs_mark_dquot_dirty,
649 .write_info = reiserfs_write_info,
650 .alloc_dquot = dquot_alloc,
651 .destroy_dquot = dquot_destroy,
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, "super-6500",
794 "%s not supported.\n",
797 *bit_flags &= ~opt->clrmask;
799 (1 << REISERFS_UNSUPPORTED_OPT))
800 reiserfs_warning(s, "super-6501",
801 "%s not supported.\n",
804 *bit_flags |= opt->setmask;
809 if (!opt->option_name) {
810 reiserfs_warning(s, "super-6502",
811 "unknown mount option \"%s\"", p);
815 p += strlen(opt->option_name);
818 if (!opt->arg_required) {
819 reiserfs_warning(s, "super-6503",
820 "the option \"%s\" does not "
821 "require an argument\n",
828 if (opt->arg_required) {
829 reiserfs_warning(s, "super-6504",
830 "the option \"%s\" requires an "
831 "argument\n", opt->option_name);
836 reiserfs_warning(s, "super-6505",
837 "head of option \"%s\" is only correct\n",
842 /* move to the argument, or to next option if argument is not required */
845 if (opt->arg_required
846 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
848 /* this catches "option=," if not allowed */
849 reiserfs_warning(s, "super-6506",
850 "empty argument for \"%s\"\n",
856 /* *=NULLopt_arg contains pointer to argument */
858 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
861 /* values possible for this option are listed in opt->values */
862 for (arg = opt->values; arg->value; arg++) {
863 if (!strcmp(p, arg->value)) {
865 *bit_flags &= ~arg->clrmask;
866 *bit_flags |= arg->setmask;
868 return opt->arg_required;
872 reiserfs_warning(s, "super-6506",
873 "bad value \"%s\" for option \"%s\"\n", p,
878 /* returns 0 if something is wrong in option string, 1 - otherwise */
879 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
880 unsigned long *mount_options,
881 /* after the parsing phase, contains the
882 collection of bitflags defining what
883 mount options were selected. */
884 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
886 unsigned int *commit_max_age,
893 opt_desc_t opts[] = {
894 /* Compatibility stuff, so that -o notail for old setups still work */
895 {"tails",.arg_required = 't',.values = tails},
897 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
898 {"conv",.setmask = 1 << REISERFS_CONVERT},
899 {"attrs",.setmask = 1 << REISERFS_ATTRS},
900 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
901 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
902 #ifdef CONFIG_REISERFS_FS_XATTR
903 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
904 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
906 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
907 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
909 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
910 {"acl",.setmask = 1 << REISERFS_POSIXACL},
911 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
913 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
914 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
916 {.option_name = "nolog"},
917 {"replayonly",.setmask = 1 << REPLAYONLY},
918 {"block-allocator",.arg_required = 'a',.values = balloc},
919 {"data",.arg_required = 'd',.values = logging_mode},
920 {"barrier",.arg_required = 'b',.values = barrier_mode},
921 {"resize",.arg_required = 'r',.values = NULL},
922 {"jdev",.arg_required = 'j',.values = NULL},
923 {"nolargeio",.arg_required = 'w',.values = NULL},
924 {"commit",.arg_required = 'c',.values = NULL},
925 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
926 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
927 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
928 {"errors",.arg_required = 'e',.values = error_actions},
929 {"usrjquota",.arg_required =
930 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
931 {"grpjquota",.arg_required =
932 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
933 {"jqfmt",.arg_required = 'f',.values = NULL},
934 {.option_name = NULL}
938 if (!options || !*options)
939 /* use default configuration: create tails, journaling on, no
940 conversion to newest format */
943 for (pos = options; pos;) {
944 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
946 /* wrong option is given */
953 /* "resize=NNN" or "resize=auto" */
955 if (!strcmp(arg, "auto")) {
956 /* From JFS code, to auto-get the size. */
958 s->s_bdev->bd_inode->i_size >> s->
961 *blocks = simple_strtoul(arg, &p, 0);
963 /* NNN does not look like a number */
964 reiserfs_warning(s, "super-6507",
974 unsigned long val = simple_strtoul(arg, &p, 0);
975 /* commit=NNN (time in seconds) */
976 if (*p != '\0' || val >= (unsigned int)-1) {
977 reiserfs_warning(s, "super-6508",
978 "bad value %s for -ocommit\n",
982 *commit_max_age = (unsigned int)val;
986 reiserfs_warning(s, "super-6509", "nolargeio option "
987 "is no longer supported");
992 if (arg && *arg && jdev_name) {
993 if (*jdev_name) { //Hm, already assigned?
994 reiserfs_warning(s, "super-6510",
995 "journal device was "
996 "already specified to "
997 "be %s", *jdev_name);
1004 if (c == 'u' || c == 'g') {
1005 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1007 if (sb_any_quota_loaded(s) &&
1008 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1009 reiserfs_warning(s, "super-6511",
1010 "cannot change journaled "
1011 "quota options when quota "
1015 if (*arg) { /* Some filename specified? */
1016 if (REISERFS_SB(s)->s_qf_names[qtype]
1017 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1019 reiserfs_warning(s, "super-6512",
1021 "already specified.",
1025 if (strchr(arg, '/')) {
1026 reiserfs_warning(s, "super-6513",
1027 "quotafile must be "
1028 "on filesystem root.");
1032 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1033 if (!qf_names[qtype]) {
1034 reiserfs_warning(s, "reiserfs-2502",
1035 "not enough memory "
1040 strcpy(qf_names[qtype], arg);
1041 *mount_options |= 1 << REISERFS_QUOTA;
1043 if (qf_names[qtype] !=
1044 REISERFS_SB(s)->s_qf_names[qtype])
1045 kfree(qf_names[qtype]);
1046 qf_names[qtype] = NULL;
1050 if (!strcmp(arg, "vfsold"))
1051 *qfmt = QFMT_VFS_OLD;
1052 else if (!strcmp(arg, "vfsv0"))
1053 *qfmt = QFMT_VFS_V0;
1055 reiserfs_warning(s, "super-6514",
1056 "unknown quota format "
1060 if (sb_any_quota_loaded(s) &&
1061 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1062 reiserfs_warning(s, "super-6515",
1063 "cannot change journaled "
1064 "quota options when quota "
1070 if (c == 'u' || c == 'g' || c == 'f') {
1071 reiserfs_warning(s, "reiserfs-2503", "journaled "
1072 "quota options not supported.");
1079 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1080 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1081 reiserfs_warning(s, "super-6515",
1082 "journaled quota format not specified.");
1085 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1086 if (!(*mount_options & (1 << REISERFS_QUOTA))
1087 && sb_any_quota_loaded(s)) {
1088 reiserfs_warning(s, "super-6516", "quota options must "
1089 "be present when quota is turned on.");
1097 static void switch_data_mode(struct super_block *s, unsigned long mode)
1099 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1100 (1 << REISERFS_DATA_ORDERED) |
1101 (1 << REISERFS_DATA_WRITEBACK));
1102 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1105 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1107 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1108 if (!reiserfs_data_log(s)) {
1109 switch_data_mode(s, REISERFS_DATA_LOG);
1110 reiserfs_info(s, "switching to journaled data mode\n");
1112 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1113 if (!reiserfs_data_ordered(s)) {
1114 switch_data_mode(s, REISERFS_DATA_ORDERED);
1115 reiserfs_info(s, "switching to ordered data mode\n");
1117 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1118 if (!reiserfs_data_writeback(s)) {
1119 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1120 reiserfs_info(s, "switching to writeback data mode\n");
1125 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1127 int flush = (1 << REISERFS_BARRIER_FLUSH);
1128 int none = (1 << REISERFS_BARRIER_NONE);
1129 int all_barrier = flush | none;
1131 if (bits & all_barrier) {
1132 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1134 REISERFS_SB(s)->s_mount_opt |= flush;
1135 printk("reiserfs: enabling write barrier flush mode\n");
1136 } else if (bits & none) {
1137 REISERFS_SB(s)->s_mount_opt |= none;
1138 printk("reiserfs: write barriers turned off\n");
1143 static void handle_attrs(struct super_block *s)
1145 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1147 if (reiserfs_attrs(s)) {
1148 if (old_format_only(s)) {
1149 reiserfs_warning(s, "super-6517", "cannot support "
1150 "attributes on 3.5.x disk format");
1151 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1154 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1155 reiserfs_warning(s, "super-6518", "cannot support "
1156 "attributes until flag is set in "
1158 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1164 static void handle_quota_files(struct super_block *s, char **qf_names,
1169 for (i = 0; i < MAXQUOTAS; i++) {
1170 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1171 kfree(REISERFS_SB(s)->s_qf_names[i]);
1172 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1174 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1178 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1180 struct reiserfs_super_block *rs;
1181 struct reiserfs_transaction_handle th;
1182 unsigned long blocks;
1183 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1184 unsigned long safe_mask = 0;
1185 unsigned int commit_max_age = (unsigned int)-1;
1186 struct reiserfs_journal *journal = SB_JOURNAL(s);
1187 char *new_opts = kstrdup(arg, GFP_KERNEL);
1189 char *qf_names[MAXQUOTAS];
1190 unsigned int qfmt = 0;
1194 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1197 rs = SB_DISK_SUPER_BLOCK(s);
1199 if (!reiserfs_parse_options
1200 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1203 for (i = 0; i < MAXQUOTAS; i++)
1204 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1211 handle_quota_files(s, qf_names, &qfmt);
1216 /* Add options that are safe here */
1217 safe_mask |= 1 << REISERFS_SMALLTAIL;
1218 safe_mask |= 1 << REISERFS_LARGETAIL;
1219 safe_mask |= 1 << REISERFS_NO_BORDER;
1220 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1221 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1222 safe_mask |= 1 << REISERFS_TEST4;
1223 safe_mask |= 1 << REISERFS_ATTRS;
1224 safe_mask |= 1 << REISERFS_XATTRS_USER;
1225 safe_mask |= 1 << REISERFS_POSIXACL;
1226 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1227 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1228 safe_mask |= 1 << REISERFS_ERROR_RO;
1229 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1230 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1231 safe_mask |= 1 << REISERFS_QUOTA;
1233 /* Update the bitmask, taking care to keep
1234 * the bits we're not allowed to change here */
1235 REISERFS_SB(s)->s_mount_opt =
1237 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1239 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1240 journal->j_max_commit_age = commit_max_age;
1241 journal->j_max_trans_age = commit_max_age;
1242 } else if (commit_max_age == 0) {
1243 /* 0 means restore defaults. */
1244 journal->j_max_commit_age = journal->j_default_max_commit_age;
1245 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1249 err = reiserfs_resize(s, blocks);
1254 if (*mount_flags & MS_RDONLY) {
1255 reiserfs_xattr_init(s, *mount_flags);
1256 /* remount read-only */
1257 if (s->s_flags & MS_RDONLY)
1258 /* it is read-only already */
1260 /* try to remount file system with read-only permissions */
1261 if (sb_umount_state(rs) == REISERFS_VALID_FS
1262 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1266 err = journal_begin(&th, s, 10);
1270 /* Mounting a rw partition read-only. */
1271 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1272 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1273 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1275 /* remount read-write */
1276 if (!(s->s_flags & MS_RDONLY)) {
1277 reiserfs_xattr_init(s, *mount_flags);
1278 goto out_ok; /* We are read-write already */
1281 if (reiserfs_is_journal_aborted(journal)) {
1282 err = journal->j_errno;
1286 handle_data_mode(s, mount_options);
1287 handle_barrier_mode(s, mount_options);
1288 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1289 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1290 err = journal_begin(&th, s, 10);
1294 /* Mount a partition which is read-only, read-write */
1295 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1296 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1297 s->s_flags &= ~MS_RDONLY;
1298 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1299 if (!old_format_only(s))
1300 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1301 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1302 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1303 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1305 /* this will force a full flush of all journal lists */
1306 SB_JOURNAL(s)->j_must_wait = 1;
1307 err = journal_end(&th, s, 10);
1312 if (!(*mount_flags & MS_RDONLY)) {
1313 finish_unfinished(s);
1314 reiserfs_xattr_init(s, *mount_flags);
1318 replace_mount_options(s, new_opts);
1326 static int read_super_block(struct super_block *s, int offset)
1328 struct buffer_head *bh;
1329 struct reiserfs_super_block *rs;
1332 bh = sb_bread(s, offset / s->s_blocksize);
1334 reiserfs_warning(s, "sh-2006",
1335 "bread failed (dev %s, block %lu, size %lu)",
1336 reiserfs_bdevname(s), offset / s->s_blocksize,
1341 rs = (struct reiserfs_super_block *)bh->b_data;
1342 if (!is_any_reiserfs_magic_string(rs)) {
1347 // ok, reiserfs signature (old or new) found in at the given offset
1349 fs_blocksize = sb_blocksize(rs);
1351 sb_set_blocksize(s, fs_blocksize);
1353 bh = sb_bread(s, offset / s->s_blocksize);
1355 reiserfs_warning(s, "sh-2007",
1356 "bread failed (dev %s, block %lu, size %lu)",
1357 reiserfs_bdevname(s), offset / s->s_blocksize,
1362 rs = (struct reiserfs_super_block *)bh->b_data;
1363 if (sb_blocksize(rs) != s->s_blocksize) {
1364 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1365 "filesystem on (dev %s, block %Lu, size %lu)",
1366 reiserfs_bdevname(s),
1367 (unsigned long long)bh->b_blocknr,
1373 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1375 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1376 "--rebuild-tree run detected. Please run\n"
1377 "reiserfsck --rebuild-tree and wait for a "
1378 "completion. If that fails\n"
1379 "get newer reiserfsprogs package");
1383 SB_BUFFER_WITH_SB(s) = bh;
1384 SB_DISK_SUPER_BLOCK(s) = rs;
1386 if (is_reiserfs_jr(rs)) {
1387 /* magic is of non-standard journal filesystem, look at s_version to
1388 find which format is in use */
1389 if (sb_version(rs) == REISERFS_VERSION_2)
1390 reiserfs_info(s, "found reiserfs format \"3.6\""
1391 " with non-standard journal\n");
1392 else if (sb_version(rs) == REISERFS_VERSION_1)
1393 reiserfs_info(s, "found reiserfs format \"3.5\""
1394 " with non-standard journal\n");
1396 reiserfs_warning(s, "sh-2012", "found unknown "
1397 "format \"%u\" of reiserfs with "
1398 "non-standard magic", sb_version(rs));
1402 /* s_version of standard format may contain incorrect information,
1403 so we just look at the magic string */
1405 "found reiserfs format \"%s\" with standard journal\n",
1406 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1408 s->s_op = &reiserfs_sops;
1409 s->s_export_op = &reiserfs_export_ops;
1411 s->s_qcop = &reiserfs_qctl_operations;
1412 s->dq_op = &reiserfs_quota_operations;
1415 /* new format is limited by the 32 bit wide i_blocks field, want to
1416 ** be one full block below that.
1418 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1422 /* after journal replay, reread all bitmap and super blocks */
1423 static int reread_meta_blocks(struct super_block *s)
1425 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1426 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1427 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1428 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1435 /////////////////////////////////////////////////////
1436 // hash detection stuff
1438 // if root directory is empty - we set default - Yura's - hash and
1440 // FIXME: we look for only one name in a directory. If tea and yura
1441 // bith have the same value - we ask user to send report to the
1443 static __u32 find_hash_out(struct super_block *s)
1446 struct inode *inode;
1448 INITIALIZE_PATH(path);
1449 struct reiserfs_dir_entry de;
1450 __u32 hash = DEFAULT_HASH;
1452 inode = s->s_root->d_inode;
1454 do { // Some serious "goto"-hater was there ;)
1455 u32 teahash, r5hash, yurahash;
1457 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1458 retval = search_by_entry_key(s, &key, &path, &de);
1459 if (retval == IO_ERROR) {
1463 if (retval == NAME_NOT_FOUND)
1465 set_de_name_and_namelen(&de);
1466 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1467 /* allow override in this case */
1468 if (reiserfs_rupasov_hash(s)) {
1471 reiserfs_info(s, "FS seems to be empty, autodetect "
1472 "is using the default hash\n");
1475 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1476 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1477 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1478 if (((teahash == r5hash)
1480 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1481 == r5hash)) || ((teahash == yurahash)
1483 GET_HASH_VALUE(deh_offset
1488 || ((r5hash == yurahash)
1490 GET_HASH_VALUE(deh_offset
1491 (&(de.de_deh[de.de_entry_num])))))) {
1492 reiserfs_warning(s, "reiserfs-2506", "Unable to "
1493 "automatically detect hash function. "
1494 "Please mount with -o "
1495 "hash={tea,rupasov,r5}");
1499 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1502 else if (GET_HASH_VALUE
1503 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1505 else if (GET_HASH_VALUE
1506 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1509 reiserfs_warning(s, "reiserfs-2506",
1510 "Unrecognised hash function");
1519 // finds out which hash names are sorted with
1520 static int what_hash(struct super_block *s)
1524 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1526 /* reiserfs_hash_detect() == true if any of the hash mount options
1527 ** were used. We must check them to make sure the user isn't
1528 ** using a bad hash value
1530 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1531 code = find_hash_out(s);
1533 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1534 /* detection has found the hash, and we must check against the
1537 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1538 reiserfs_warning(s, "reiserfs-2507",
1539 "Error, %s hash detected, "
1540 "unable to force rupasov hash",
1541 reiserfs_hashname(code));
1543 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1544 reiserfs_warning(s, "reiserfs-2508",
1545 "Error, %s hash detected, "
1546 "unable to force tea hash",
1547 reiserfs_hashname(code));
1549 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1550 reiserfs_warning(s, "reiserfs-2509",
1551 "Error, %s hash detected, "
1552 "unable to force r5 hash",
1553 reiserfs_hashname(code));
1557 /* find_hash_out was not called or could not determine the hash */
1558 if (reiserfs_rupasov_hash(s)) {
1560 } else if (reiserfs_tea_hash(s)) {
1562 } else if (reiserfs_r5_hash(s)) {
1567 /* if we are mounted RW, and we have a new valid hash code, update
1570 if (code != UNSET_HASH &&
1571 !(s->s_flags & MS_RDONLY) &&
1572 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1573 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1578 // return pointer to appropriate function
1579 static hashf_t hash_function(struct super_block *s)
1581 switch (what_hash(s)) {
1583 reiserfs_info(s, "Using tea hash to sort names\n");
1586 reiserfs_info(s, "Using rupasov hash to sort names\n");
1589 reiserfs_info(s, "Using r5 hash to sort names\n");
1595 // this is used to set up correct value for old partitions
1596 static int function2code(hashf_t func)
1598 if (func == keyed_hash)
1600 if (func == yura_hash)
1602 if (func == r5_hash)
1605 BUG(); // should never happen
1610 #define SWARN(silent, s, id, ...) \
1612 reiserfs_warning(s, id, __VA_ARGS__)
1614 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1616 struct inode *root_inode;
1617 struct reiserfs_transaction_handle th;
1619 unsigned long blocks;
1620 unsigned int commit_max_age = 0;
1622 struct reiserfs_iget_args args;
1623 struct reiserfs_super_block *rs;
1625 struct reiserfs_sb_info *sbi;
1626 int errval = -EINVAL;
1627 char *qf_names[MAXQUOTAS] = {};
1628 unsigned int qfmt = 0;
1630 save_mount_options(s, data);
1632 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1638 /* Set default values for options: non-aggressive tails, RO on errors */
1639 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1640 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1641 /* no preallocation minimum, be smart in
1642 reiserfs_file_write instead */
1643 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1644 /* Preallocate by 16 blocks (17-1) at once */
1645 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1646 /* setup default block allocator options */
1647 reiserfs_init_alloc_options(s);
1650 if (reiserfs_parse_options
1651 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1652 &commit_max_age, qf_names, &qfmt) == 0) {
1656 handle_quota_files(s, qf_names, &qfmt);
1660 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1664 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1665 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1667 /* try new format (64-th 1k block), which can contain reiserfs super block */
1668 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1669 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1670 reiserfs_bdevname(s));
1674 rs = SB_DISK_SUPER_BLOCK(s);
1675 /* Let's do basic sanity check to verify that underlying device is not
1676 smaller than the filesystem. If the check fails then abort and scream,
1677 because bad stuff will happen otherwise. */
1678 if (s->s_bdev && s->s_bdev->bd_inode
1679 && i_size_read(s->s_bdev->bd_inode) <
1680 sb_block_count(rs) * sb_blocksize(rs)) {
1681 SWARN(silent, s, "", "Filesystem cannot be "
1682 "mounted because it is bigger than the device");
1683 SWARN(silent, s, "", "You may need to run fsck "
1684 "or increase size of your LVM partition");
1685 SWARN(silent, s, "", "Or may be you forgot to "
1686 "reboot after fdisk when it told you to");
1690 sbi->s_mount_state = SB_REISERFS_STATE(s);
1691 sbi->s_mount_state = REISERFS_VALID_FS;
1693 if ((errval = reiserfs_init_bitmap_cache(s))) {
1694 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1698 #ifdef CONFIG_REISERFS_CHECK
1699 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1700 SWARN(silent, s, "", "- it is slow mode for debugging.");
1703 /* make data=ordered the default */
1704 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1705 !reiserfs_data_writeback(s)) {
1706 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1709 if (reiserfs_data_log(s)) {
1710 reiserfs_info(s, "using journaled data mode\n");
1711 } else if (reiserfs_data_ordered(s)) {
1712 reiserfs_info(s, "using ordered data mode\n");
1714 reiserfs_info(s, "using writeback data mode\n");
1716 if (reiserfs_barrier_flush(s)) {
1717 printk("reiserfs: using flush barriers\n");
1719 // set_device_ro(s->s_dev, 1) ;
1720 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1721 SWARN(silent, s, "sh-2022",
1722 "unable to initialize journal space");
1725 jinit_done = 1; /* once this is set, journal_release must be called
1726 ** if we error out of the mount
1729 if (reread_meta_blocks(s)) {
1730 SWARN(silent, s, "jmacd-9",
1731 "unable to reread meta blocks after journal init");
1738 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1739 SWARN(silent, s, "clm-7000",
1740 "Detected readonly device, marking FS readonly");
1741 s->s_flags |= MS_RDONLY;
1743 args.objectid = REISERFS_ROOT_OBJECTID;
1744 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1746 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1747 reiserfs_init_locked_inode, (void *)(&args));
1749 SWARN(silent, s, "jmacd-10", "get root inode failed");
1753 if (root_inode->i_state & I_NEW) {
1754 reiserfs_read_locked_inode(root_inode, &args);
1755 unlock_new_inode(root_inode);
1758 s->s_root = d_alloc_root(root_inode);
1763 // define and initialize hash function
1764 sbi->s_hash_function = hash_function(s);
1765 if (sbi->s_hash_function == NULL) {
1771 if (is_reiserfs_3_5(rs)
1772 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1773 set_bit(REISERFS_3_5, &(sbi->s_properties));
1774 else if (old_format)
1775 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1777 set_bit(REISERFS_3_6, &(sbi->s_properties));
1779 if (!(s->s_flags & MS_RDONLY)) {
1781 errval = journal_begin(&th, s, 1);
1787 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1789 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1790 set_sb_fs_state(rs, 0);
1792 /* Clear out s_bmap_nr if it would wrap. We can handle this
1793 * case, but older revisions can't. This will cause the
1794 * file system to fail mount on those older implementations,
1795 * avoiding corruption. -jeffm */
1796 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
1797 sb_bmap_nr(rs) != 0) {
1798 reiserfs_warning(s, "super-2030", "This file system "
1799 "claims to use %u bitmap blocks in "
1800 "its super block, but requires %u. "
1801 "Clearing to zero.", sb_bmap_nr(rs),
1802 reiserfs_bmap_count(s));
1804 set_sb_bmap_nr(rs, 0);
1807 if (old_format_only(s)) {
1808 /* filesystem of format 3.5 either with standard or non-standard
1810 if (convert_reiserfs(s)) {
1811 /* and -o conv is given */
1814 "converting 3.5 filesystem to the 3.6 format");
1816 if (is_reiserfs_3_5(rs))
1817 /* put magic string of 3.6 format. 2.2 will not be able to
1818 mount this filesystem anymore */
1819 memcpy(rs->s_v1.s_magic,
1820 reiserfs_3_6_magic_string,
1822 (reiserfs_3_6_magic_string));
1824 set_sb_version(rs, REISERFS_VERSION_2);
1825 reiserfs_convert_objectid_map_v1(s);
1826 set_bit(REISERFS_3_6, &(sbi->s_properties));
1827 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1828 } else if (!silent) {
1829 reiserfs_info(s, "using 3.5.x disk format\n");
1832 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1835 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1836 errval = journal_end(&th, s, 1);
1843 if ((errval = reiserfs_lookup_privroot(s)) ||
1844 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1850 /* look for files which were to be removed in previous session */
1851 finish_unfinished(s);
1853 if (old_format_only(s) && !silent) {
1854 reiserfs_info(s, "using 3.5.x disk format\n");
1857 if ((errval = reiserfs_lookup_privroot(s)) ||
1858 (errval = reiserfs_xattr_init(s, s->s_flags))) {
1864 // mark hash in super block: it could be unset. overwrite should be ok
1865 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1869 reiserfs_proc_info_init(s);
1871 init_waitqueue_head(&(sbi->s_wait));
1872 spin_lock_init(&sbi->bitmap_lock);
1877 if (jinit_done) { /* kill the commit thread, free journal ram */
1878 journal_release_error(NULL, s);
1881 reiserfs_free_bitmap_cache(s);
1882 if (SB_BUFFER_WITH_SB(s))
1883 brelse(SB_BUFFER_WITH_SB(s));
1887 for (j = 0; j < MAXQUOTAS; j++)
1893 s->s_fs_info = NULL;
1897 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1899 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1901 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1902 buf->f_bfree = sb_free_blocks(rs);
1903 buf->f_bavail = buf->f_bfree;
1904 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1905 buf->f_bsize = dentry->d_sb->s_blocksize;
1906 /* changed to accommodate gcc folks. */
1907 buf->f_type = REISERFS_SUPER_MAGIC;
1908 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
1909 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
1910 sizeof(rs->s_uuid)/2);
1916 static int reiserfs_write_dquot(struct dquot *dquot)
1918 struct reiserfs_transaction_handle th;
1921 reiserfs_write_lock(dquot->dq_sb);
1923 journal_begin(&th, dquot->dq_sb,
1924 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1927 ret = dquot_commit(dquot);
1929 journal_end(&th, dquot->dq_sb,
1930 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1934 reiserfs_write_unlock(dquot->dq_sb);
1938 static int reiserfs_acquire_dquot(struct dquot *dquot)
1940 struct reiserfs_transaction_handle th;
1943 reiserfs_write_lock(dquot->dq_sb);
1945 journal_begin(&th, dquot->dq_sb,
1946 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1949 ret = dquot_acquire(dquot);
1951 journal_end(&th, dquot->dq_sb,
1952 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1956 reiserfs_write_unlock(dquot->dq_sb);
1960 static int reiserfs_release_dquot(struct dquot *dquot)
1962 struct reiserfs_transaction_handle th;
1965 reiserfs_write_lock(dquot->dq_sb);
1967 journal_begin(&th, dquot->dq_sb,
1968 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1970 /* Release dquot anyway to avoid endless cycle in dqput() */
1971 dquot_release(dquot);
1974 ret = dquot_release(dquot);
1976 journal_end(&th, dquot->dq_sb,
1977 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1981 reiserfs_write_unlock(dquot->dq_sb);
1985 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1987 /* Are we journaling quotas? */
1988 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1989 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1990 dquot_mark_dquot_dirty(dquot);
1991 return reiserfs_write_dquot(dquot);
1993 return dquot_mark_dquot_dirty(dquot);
1996 static int reiserfs_write_info(struct super_block *sb, int type)
1998 struct reiserfs_transaction_handle th;
2001 /* Data block + inode block */
2002 reiserfs_write_lock(sb);
2003 ret = journal_begin(&th, sb, 2);
2006 ret = dquot_commit_info(sb, type);
2007 err = journal_end(&th, sb, 2);
2011 reiserfs_write_unlock(sb);
2016 * Turn on quotas during mount time - we need to find the quota file and such...
2018 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2020 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2021 REISERFS_SB(sb)->s_jquota_fmt, type);
2025 * Standard function to be called on quota_on
2027 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2028 char *name, int remount)
2032 struct inode *inode;
2033 struct reiserfs_transaction_handle th;
2035 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2037 /* No more checks needed? Path and format_id are bogus anyway... */
2039 return vfs_quota_on(sb, type, format_id, name, 1);
2040 err = kern_path(name, LOOKUP_FOLLOW, &path);
2043 /* Quotafile not on the same filesystem? */
2044 if (path.mnt->mnt_sb != sb) {
2048 inode = path.dentry->d_inode;
2049 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2050 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2051 err = reiserfs_unpack(inode, NULL);
2053 reiserfs_warning(sb, "super-6520",
2054 "Unpacking tail of quota file failed"
2055 " (%d). Cannot turn on quotas.", err);
2059 mark_inode_dirty(inode);
2061 /* Journaling quota? */
2062 if (REISERFS_SB(sb)->s_qf_names[type]) {
2063 /* Quotafile not of fs root? */
2064 if (path.dentry->d_parent != sb->s_root)
2065 reiserfs_warning(sb, "super-6521",
2066 "Quota file not on filesystem root. "
2067 "Journalled quota will not work.");
2071 * When we journal data on quota file, we have to flush journal to see
2072 * all updates to the file when we bypass pagecache...
2074 if (reiserfs_file_data_log(inode)) {
2075 /* Just start temporary transaction and finish it */
2076 err = journal_begin(&th, sb, 1);
2079 err = journal_end_sync(&th, sb, 1);
2083 err = vfs_quota_on_path(sb, type, format_id, &path);
2089 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2090 * acquiring the locks... As quota files are never truncated and quota code
2091 * itself serializes the operations (and noone else should touch the files)
2092 * we don't have to be afraid of races */
2093 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2094 size_t len, loff_t off)
2096 struct inode *inode = sb_dqopt(sb)->files[type];
2097 unsigned long blk = off >> sb->s_blocksize_bits;
2098 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2100 struct buffer_head tmp_bh, *bh;
2101 loff_t i_size = i_size_read(inode);
2105 if (off + len > i_size)
2108 while (toread > 0) {
2110 sb->s_blocksize - offset <
2111 toread ? sb->s_blocksize - offset : toread;
2113 /* Quota files are without tails so we can safely use this function */
2114 reiserfs_write_lock(sb);
2115 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2116 reiserfs_write_unlock(sb);
2119 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2120 memset(data, 0, tocopy);
2122 bh = sb_bread(sb, tmp_bh.b_blocknr);
2125 memcpy(data, bh->b_data + offset, tocopy);
2136 /* Write to quotafile (we know the transaction is already started and has
2137 * enough credits) */
2138 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2139 const char *data, size_t len, loff_t off)
2141 struct inode *inode = sb_dqopt(sb)->files[type];
2142 unsigned long blk = off >> sb->s_blocksize_bits;
2143 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2144 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2145 size_t towrite = len;
2146 struct buffer_head tmp_bh, *bh;
2148 if (!current->journal_info) {
2149 printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
2150 " cancelled because transaction is not started.\n",
2151 (unsigned long long)off, (unsigned long long)len);
2154 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2155 while (towrite > 0) {
2156 tocopy = sb->s_blocksize - offset < towrite ?
2157 sb->s_blocksize - offset : towrite;
2159 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2162 if (offset || tocopy != sb->s_blocksize)
2163 bh = sb_bread(sb, tmp_bh.b_blocknr);
2165 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2171 memcpy(bh->b_data + offset, data, tocopy);
2172 flush_dcache_page(bh->b_page);
2173 set_buffer_uptodate(bh);
2175 reiserfs_prepare_for_journal(sb, bh, 1);
2176 journal_mark_dirty(current->journal_info, sb, bh);
2178 reiserfs_add_ordered_list(inode, bh);
2186 if (len == towrite) {
2187 mutex_unlock(&inode->i_mutex);
2190 if (inode->i_size < off + len - towrite)
2191 i_size_write(inode, off + len - towrite);
2193 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2194 mark_inode_dirty(inode);
2195 mutex_unlock(&inode->i_mutex);
2196 return len - towrite;
2201 static int get_super_block(struct file_system_type *fs_type,
2202 int flags, const char *dev_name,
2203 void *data, struct vfsmount *mnt)
2205 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2209 static int __init init_reiserfs_fs(void)
2213 if ((ret = init_inodecache())) {
2217 reiserfs_proc_info_global_init();
2218 reiserfs_proc_register_global("version",
2219 reiserfs_global_version_in_proc);
2221 ret = register_filesystem(&reiserfs_fs_type);
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_proc_unregister_global("version");
2237 reiserfs_proc_info_global_done();
2238 unregister_filesystem(&reiserfs_fs_type);
2239 destroy_inodecache();
2242 struct file_system_type reiserfs_fs_type = {
2243 .owner = THIS_MODULE,
2245 .get_sb = get_super_block,
2246 .kill_sb = reiserfs_kill_sb,
2247 .fs_flags = FS_REQUIRES_DEV,
2250 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2251 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2252 MODULE_LICENSE("GPL");
2254 module_init(init_reiserfs_fs);
2255 module_exit(exit_reiserfs_fs);