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/smp_lock.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/buffer_head.h>
25 #include <linux/vfs.h>
26 #include <linux/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;
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;
170 /* Needed for iput() to work correctly and not trash data */
171 if (s->s_flags & MS_ACTIVE) {
175 s->s_flags |= MS_ACTIVE;
177 /* Turn on quotas so that they are updated correctly */
178 for (i = 0; i < MAXQUOTAS; i++) {
179 if (REISERFS_SB(s)->s_qf_names[i]) {
180 int ret = reiserfs_quota_on_mount(s, i);
183 "reiserfs: cannot turn on journalled quota: error %d",
190 REISERFS_SB(s)->s_is_unlinked_ok = 1;
192 retval = search_item(s, &max_cpu_key, &path);
193 if (retval != ITEM_NOT_FOUND) {
195 "vs-2140: finish_unfinished: search_by_key returned %d",
200 bh = get_last_bh(&path);
201 item_pos = get_item_pos(&path);
202 if (item_pos != B_NR_ITEMS(bh)) {
204 "vs-2060: finish_unfinished: wrong position found");
208 ih = B_N_PITEM_HEAD(bh, item_pos);
210 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
211 /* there are no "save" links anymore */
214 save_link_key = ih->ih_key;
215 if (is_indirect_le_ih(ih))
220 /* reiserfs_iget needs k_dirid and k_objectid only */
221 item = B_I_PITEM(bh, ih);
222 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
223 obj_key.on_disk_key.k_objectid =
224 le32_to_cpu(ih->ih_key.k_objectid);
225 obj_key.on_disk_key.k_offset = 0;
226 obj_key.on_disk_key.k_type = 0;
230 inode = reiserfs_iget(s, &obj_key);
232 /* the unlink almost completed, it just did not manage to remove
233 "save" link and release objectid */
235 "vs-2180: finish_unfinished: 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 */
244 "vs-2185: finish_unfinished: 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
257 "green-2101: impossible truncate on a directory %k. Please report",
259 retval = remove_save_link_only(s, &save_link_key, 0);
266 REISERFS_I(inode)->i_flags |=
267 i_link_saved_truncate_mask;
268 /* not completed truncate found. New size was committed together
270 reiserfs_info(s, "Truncating %k to %Ld ..",
271 INODE_PKEY(inode), inode->i_size);
272 reiserfs_truncate_file(inode,
274 /*don't update modification time */
276 retval = remove_save_link(inode, truncate);
278 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
279 /* not completed unlink (rmdir) found */
280 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
281 /* removal gets completed in iput */
289 REISERFS_SB(s)->s_is_unlinked_ok = 0;
292 /* Turn quotas off */
293 for (i = 0; i < MAXQUOTAS; i++) {
294 if (sb_dqopt(s)->files[i])
295 vfs_quota_off_mount(s, i);
298 /* Restore the flag back */
299 s->s_flags &= ~MS_ACTIVE;
303 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
304 "Completed\n", done);
308 /* to protect file being unlinked from getting lost we "safe" link files
309 being unlinked. This link will be deleted in the same transaction with last
310 item of file. mounting the filesytem we scan all these links and remove
311 files which almost got lost */
312 void add_save_link(struct reiserfs_transaction_handle *th,
313 struct inode *inode, int truncate)
315 INITIALIZE_PATH(path);
321 BUG_ON(!th->t_trans_id);
323 /* file can only get one "save link" of each kind */
325 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
326 "saved link already exists for truncated inode %lx",
329 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
330 "saved link already exists for unlinked inode %lx",
333 /* setup key of "save" link */
334 key.version = KEY_FORMAT_3_5;
335 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
336 key.on_disk_key.k_objectid = inode->i_ino;
338 /* unlink, rmdir, rename */
339 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
340 set_cpu_key_k_type(&key, TYPE_DIRECT);
342 /* item head of "safe" link */
343 make_le_item_head(&ih, &key, key.version,
344 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
345 4 /*length */ , 0xffff /*free space */ );
348 if (S_ISDIR(inode->i_mode))
349 reiserfs_warning(inode->i_sb,
350 "green-2102: Adding a truncate savelink for a directory %k! Please report",
352 set_cpu_key_k_offset(&key, 1);
353 set_cpu_key_k_type(&key, TYPE_INDIRECT);
355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
357 4 /*length */ , 0 /*free space */ );
361 /* look for its place in the tree */
362 retval = search_item(inode->i_sb, &key, &path);
363 if (retval != ITEM_NOT_FOUND) {
364 if (retval != -ENOSPC)
365 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
366 "search_by_key (%K) returned %d", &key,
372 /* body of "save" link */
373 link = INODE_PKEY(inode)->k_dir_id;
375 /* put "save" link inot tree, don't charge quota to anyone */
377 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
379 if (retval != -ENOSPC)
380 reiserfs_warning(inode->i_sb,
381 "vs-2120: add_save_link: insert_item returned %d",
385 REISERFS_I(inode)->i_flags |=
386 i_link_saved_truncate_mask;
388 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
392 /* this opens transaction unlike add_save_link */
393 int remove_save_link(struct inode *inode, int truncate)
395 struct reiserfs_transaction_handle th;
396 struct reiserfs_key key;
399 /* we are going to do one balancing only */
400 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
404 /* setup key of "save" link */
405 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
406 key.k_objectid = INODE_PKEY(inode)->k_objectid;
408 /* unlink, rmdir, rename */
409 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
410 1 + inode->i_sb->s_blocksize);
411 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
414 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
415 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
419 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
421 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
422 /* don't take quota bytes from anywhere */
423 reiserfs_delete_solid_item(&th, NULL, &key);
425 reiserfs_release_objectid(&th, inode->i_ino);
426 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
428 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
430 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
433 static void reiserfs_put_super(struct super_block *s)
436 struct reiserfs_transaction_handle th;
439 if (REISERFS_SB(s)->xattr_root) {
440 d_invalidate(REISERFS_SB(s)->xattr_root);
441 dput(REISERFS_SB(s)->xattr_root);
444 if (REISERFS_SB(s)->priv_root) {
445 d_invalidate(REISERFS_SB(s)->priv_root);
446 dput(REISERFS_SB(s)->priv_root);
449 /* change file system state to current state if it was mounted with read-write permissions */
450 if (!(s->s_flags & MS_RDONLY)) {
451 if (!journal_begin(&th, s, 10)) {
452 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
454 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
455 REISERFS_SB(s)->s_mount_state);
456 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
460 /* note, journal_release checks for readonly mount, and can decide not
461 ** to do a journal_end
463 journal_release(&th, s);
465 for (i = 0; i < SB_BMAP_NR(s); i++)
466 brelse(SB_AP_BITMAP(s)[i].bh);
468 vfree(SB_AP_BITMAP(s));
470 brelse(SB_BUFFER_WITH_SB(s));
474 if (REISERFS_SB(s)->reserved_blocks != 0) {
476 "green-2005: reiserfs_put_super: reserved blocks left %d",
477 REISERFS_SB(s)->reserved_blocks);
480 reiserfs_proc_info_done(s);
488 static kmem_cache_t *reiserfs_inode_cachep;
490 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
492 struct reiserfs_inode_info *ei;
493 ei = (struct reiserfs_inode_info *)
494 kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
497 return &ei->vfs_inode;
500 static void reiserfs_destroy_inode(struct inode *inode)
502 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
505 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
507 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
509 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
510 SLAB_CTOR_CONSTRUCTOR) {
511 INIT_LIST_HEAD(&ei->i_prealloc_list);
512 inode_init_once(&ei->vfs_inode);
513 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
514 ei->i_acl_access = NULL;
515 ei->i_acl_default = NULL;
520 static int init_inodecache(void)
522 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
524 reiserfs_inode_info),
525 0, (SLAB_RECLAIM_ACCOUNT|
528 if (reiserfs_inode_cachep == NULL)
533 static void destroy_inodecache(void)
535 kmem_cache_destroy(reiserfs_inode_cachep);
538 /* we don't mark inodes dirty, we just log them */
539 static void reiserfs_dirty_inode(struct inode *inode)
541 struct reiserfs_transaction_handle th;
544 if (inode->i_sb->s_flags & MS_RDONLY) {
545 reiserfs_warning(inode->i_sb,
546 "clm-6006: writing inode %lu on readonly FS",
550 reiserfs_write_lock(inode->i_sb);
552 /* this is really only used for atime updates, so they don't have
553 ** to be included in O_SYNC or fsync
555 err = journal_begin(&th, inode->i_sb, 1);
557 reiserfs_write_unlock(inode->i_sb);
560 reiserfs_update_sd(&th, inode);
561 journal_end(&th, inode->i_sb, 1);
562 reiserfs_write_unlock(inode->i_sb);
565 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
566 static void reiserfs_clear_inode(struct inode *inode)
568 struct posix_acl *acl;
570 acl = REISERFS_I(inode)->i_acl_access;
571 if (acl && !IS_ERR(acl))
572 posix_acl_release(acl);
573 REISERFS_I(inode)->i_acl_access = NULL;
575 acl = REISERFS_I(inode)->i_acl_default;
576 if (acl && !IS_ERR(acl))
577 posix_acl_release(acl);
578 REISERFS_I(inode)->i_acl_default = NULL;
581 #define reiserfs_clear_inode NULL
585 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
587 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
591 static struct super_operations reiserfs_sops = {
592 .alloc_inode = reiserfs_alloc_inode,
593 .destroy_inode = reiserfs_destroy_inode,
594 .write_inode = reiserfs_write_inode,
595 .dirty_inode = reiserfs_dirty_inode,
596 .delete_inode = reiserfs_delete_inode,
597 .clear_inode = reiserfs_clear_inode,
598 .put_super = reiserfs_put_super,
599 .write_super = reiserfs_write_super,
600 .sync_fs = reiserfs_sync_fs,
601 .write_super_lockfs = reiserfs_write_super_lockfs,
602 .unlockfs = reiserfs_unlockfs,
603 .statfs = reiserfs_statfs,
604 .remount_fs = reiserfs_remount,
606 .quota_read = reiserfs_quota_read,
607 .quota_write = reiserfs_quota_write,
612 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
614 static int reiserfs_dquot_initialize(struct inode *, int);
615 static int reiserfs_dquot_drop(struct inode *);
616 static int reiserfs_write_dquot(struct dquot *);
617 static int reiserfs_acquire_dquot(struct dquot *);
618 static int reiserfs_release_dquot(struct dquot *);
619 static int reiserfs_mark_dquot_dirty(struct dquot *);
620 static int reiserfs_write_info(struct super_block *, int);
621 static int reiserfs_quota_on(struct super_block *, int, int, char *);
623 static struct dquot_operations reiserfs_quota_operations = {
624 .initialize = reiserfs_dquot_initialize,
625 .drop = reiserfs_dquot_drop,
626 .alloc_space = dquot_alloc_space,
627 .alloc_inode = dquot_alloc_inode,
628 .free_space = dquot_free_space,
629 .free_inode = dquot_free_inode,
630 .transfer = dquot_transfer,
631 .write_dquot = reiserfs_write_dquot,
632 .acquire_dquot = reiserfs_acquire_dquot,
633 .release_dquot = reiserfs_release_dquot,
634 .mark_dirty = reiserfs_mark_dquot_dirty,
635 .write_info = reiserfs_write_info,
638 static struct quotactl_ops reiserfs_qctl_operations = {
639 .quota_on = reiserfs_quota_on,
640 .quota_off = vfs_quota_off,
641 .quota_sync = vfs_quota_sync,
642 .get_info = vfs_get_dqinfo,
643 .set_info = vfs_set_dqinfo,
644 .get_dqblk = vfs_get_dqblk,
645 .set_dqblk = vfs_set_dqblk,
649 static struct export_operations reiserfs_export_ops = {
650 .encode_fh = reiserfs_encode_fh,
651 .decode_fh = reiserfs_decode_fh,
652 .get_parent = reiserfs_get_parent,
653 .get_dentry = reiserfs_get_dentry,
656 /* this struct is used in reiserfs_getopt () for containing the value for those
657 mount options that have values rather than being toggles. */
660 int setmask; /* bitmask which is to set on mount_options bitmask when this
661 value is found, 0 is no bits are to be changed. */
662 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
663 value is found, 0 is no bits are to be changed. This is
664 applied BEFORE setmask */
667 /* Set this bit in arg_required to allow empty arguments */
668 #define REISERFS_OPT_ALLOWEMPTY 31
670 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
674 int arg_required; /* 0 if argument is not required, not 0 otherwise */
675 const arg_desc_t *values; /* list of values accepted by an option */
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 /* possible values for -o data= */
684 static const arg_desc_t logging_mode[] = {
685 {"ordered", 1 << REISERFS_DATA_ORDERED,
686 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
687 {"journal", 1 << REISERFS_DATA_LOG,
688 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
689 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
690 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
694 /* possible values for -o barrier= */
695 static const arg_desc_t barrier_mode[] = {
696 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
697 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
701 /* possible values for "-o block-allocator=" and bits which are to be set in
702 s_mount_opt of reiserfs specific part of in-core super block */
703 static const arg_desc_t balloc[] = {
704 {"noborder", 1 << REISERFS_NO_BORDER, 0},
705 {"border", 0, 1 << REISERFS_NO_BORDER},
706 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
707 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
708 {"test4", 1 << REISERFS_TEST4, 0},
709 {"notest4", 0, 1 << REISERFS_TEST4},
713 static const arg_desc_t tails[] = {
714 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
715 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
716 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
720 static const arg_desc_t error_actions[] = {
721 {"panic", 1 << REISERFS_ERROR_PANIC,
722 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
723 {"ro-remount", 1 << REISERFS_ERROR_RO,
724 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
725 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
726 {"continue", 1 << REISERFS_ERROR_CONTINUE,
727 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
732 /* proceed only one option from a list *cur - string containing of mount options
733 opts - array of options which are accepted
734 opt_arg - if option is found and requires an argument and if it is specifed
735 in the input - pointer to the argument is stored here
736 bit_flags - if option requires to set a certain bit - it is set here
737 return -1 if unknown option is found, opt->arg_required otherwise */
738 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
739 char **opt_arg, unsigned long *bit_flags)
748 const opt_desc_t *opt;
749 const arg_desc_t *arg;
753 /* assume argument cannot contain commas */
754 *cur = strchr(p, ',');
760 if (!strncmp(p, "alloc=", 6)) {
761 /* Ugly special case, probably we should redo options parser so that
762 it can understand several arguments for some options, also so that
763 it can fill several bitfields with option values. */
764 if (reiserfs_parse_alloc_options(s, p + 6)) {
771 /* for every option in the list */
772 for (opt = opts; opt->option_name; opt++) {
773 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
776 (1 << REISERFS_UNSUPPORTED_OPT))
777 reiserfs_warning(s, "%s not supported.",
780 *bit_flags &= ~opt->clrmask;
782 (1 << REISERFS_UNSUPPORTED_OPT))
783 reiserfs_warning(s, "%s not supported.",
786 *bit_flags |= opt->setmask;
791 if (!opt->option_name) {
792 reiserfs_warning(s, "unknown mount option \"%s\"", p);
796 p += strlen(opt->option_name);
799 if (!opt->arg_required) {
801 "the option \"%s\" does not require an argument",
808 if (opt->arg_required) {
810 "the option \"%s\" requires an argument",
816 reiserfs_warning(s, "head of option \"%s\" is only correct",
821 /* move to the argument, or to next option if argument is not required */
824 if (opt->arg_required
825 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
827 /* this catches "option=," if not allowed */
828 reiserfs_warning(s, "empty argument for \"%s\"",
834 /* *=NULLopt_arg contains pointer to argument */
836 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
839 /* values possible for this option are listed in opt->values */
840 for (arg = opt->values; arg->value; arg++) {
841 if (!strcmp(p, arg->value)) {
843 *bit_flags &= ~arg->clrmask;
844 *bit_flags |= arg->setmask;
846 return opt->arg_required;
850 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
855 /* returns 0 if something is wrong in option string, 1 - otherwise */
856 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
857 unsigned long *mount_options,
858 /* after the parsing phase, contains the
859 collection of bitflags defining what
860 mount options were selected. */
861 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
863 unsigned int *commit_max_age)
868 opt_desc_t opts[] = {
869 /* Compatibility stuff, so that -o notail for old setups still work */
870 {"tails",.arg_required = 't',.values = tails},
872 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
873 {"conv",.setmask = 1 << REISERFS_CONVERT},
874 {"attrs",.setmask = 1 << REISERFS_ATTRS},
875 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
876 #ifdef CONFIG_REISERFS_FS_XATTR
877 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
878 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
880 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
881 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
883 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
884 {"acl",.setmask = 1 << REISERFS_POSIXACL},
885 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
887 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
888 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
890 {.option_name = "nolog"},
891 {"replayonly",.setmask = 1 << REPLAYONLY},
892 {"block-allocator",.arg_required = 'a',.values = balloc},
893 {"data",.arg_required = 'd',.values = logging_mode},
894 {"barrier",.arg_required = 'b',.values = barrier_mode},
895 {"resize",.arg_required = 'r',.values = NULL},
896 {"jdev",.arg_required = 'j',.values = NULL},
897 {"nolargeio",.arg_required = 'w',.values = NULL},
898 {"commit",.arg_required = 'c',.values = NULL},
899 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
900 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
901 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
902 {"errors",.arg_required = 'e',.values = error_actions},
903 {"usrjquota",.arg_required =
904 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
905 {"grpjquota",.arg_required =
906 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
907 {"jqfmt",.arg_required = 'f',.values = NULL},
908 {.option_name = NULL}
912 if (!options || !*options)
913 /* use default configuration: create tails, journaling on, no
914 conversion to newest format */
917 for (pos = options; pos;) {
918 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
920 /* wrong option is given */
927 /* "resize=NNN" or "resize=auto" */
929 if (!strcmp(arg, "auto")) {
930 /* From JFS code, to auto-get the size. */
932 s->s_bdev->bd_inode->i_size >> s->
935 *blocks = simple_strtoul(arg, &p, 0);
937 /* NNN does not look like a number */
939 "reiserfs_parse_options: bad value %s",
948 unsigned long val = simple_strtoul(arg, &p, 0);
949 /* commit=NNN (time in seconds) */
950 if (*p != '\0' || val >= (unsigned int)-1) {
952 "reiserfs_parse_options: bad value %s",
956 *commit_max_age = (unsigned int)val;
960 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
965 if (arg && *arg && jdev_name) {
966 if (*jdev_name) { //Hm, already assigned?
968 "reiserfs_parse_options: journal device was already specified to be %s",
976 if (c == 'u' || c == 'g') {
977 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
979 if (sb_any_quota_enabled(s)) {
981 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
984 if (*arg) { /* Some filename specified? */
985 if (REISERFS_SB(s)->s_qf_names[qtype]
986 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
989 "reiserfs_parse_options: %s quota file already specified.",
993 if (strchr(arg, '/')) {
995 "reiserfs_parse_options: quotafile must be on filesystem root.");
998 REISERFS_SB(s)->s_qf_names[qtype] =
999 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1000 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1002 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1005 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1006 *mount_options |= 1 << REISERFS_QUOTA;
1008 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1009 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1013 if (!strcmp(arg, "vfsold"))
1014 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1015 else if (!strcmp(arg, "vfsv0"))
1016 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1019 "reiserfs_parse_options: unknown quota format specified.");
1024 if (c == 'u' || c == 'g' || c == 'f') {
1026 "reiserfs_parse_options: journalled quota options not supported.");
1033 if (!REISERFS_SB(s)->s_jquota_fmt
1034 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1035 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1037 "reiserfs_parse_options: journalled quota format not specified.");
1040 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1041 if (!(*mount_options & (1 << REISERFS_QUOTA))
1042 && sb_any_quota_enabled(s)) {
1044 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1052 static void switch_data_mode(struct super_block *s, unsigned long mode)
1054 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1055 (1 << REISERFS_DATA_ORDERED) |
1056 (1 << REISERFS_DATA_WRITEBACK));
1057 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1060 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1062 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1063 if (!reiserfs_data_log(s)) {
1064 switch_data_mode(s, REISERFS_DATA_LOG);
1065 reiserfs_info(s, "switching to journaled data mode\n");
1067 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1068 if (!reiserfs_data_ordered(s)) {
1069 switch_data_mode(s, REISERFS_DATA_ORDERED);
1070 reiserfs_info(s, "switching to ordered data mode\n");
1072 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1073 if (!reiserfs_data_writeback(s)) {
1074 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1075 reiserfs_info(s, "switching to writeback data mode\n");
1080 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1082 int flush = (1 << REISERFS_BARRIER_FLUSH);
1083 int none = (1 << REISERFS_BARRIER_NONE);
1084 int all_barrier = flush | none;
1086 if (bits & all_barrier) {
1087 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1089 REISERFS_SB(s)->s_mount_opt |= flush;
1090 printk("reiserfs: enabling write barrier flush mode\n");
1091 } else if (bits & none) {
1092 REISERFS_SB(s)->s_mount_opt |= none;
1093 printk("reiserfs: write barriers turned off\n");
1098 static void handle_attrs(struct super_block *s)
1100 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1102 if (reiserfs_attrs(s)) {
1103 if (old_format_only(s)) {
1105 "reiserfs: cannot support attributes on 3.5.x disk format");
1106 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1109 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1111 "reiserfs: cannot support attributes until flag is set in super-block");
1112 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1117 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1119 struct reiserfs_super_block *rs;
1120 struct reiserfs_transaction_handle th;
1121 unsigned long blocks;
1122 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1123 unsigned long safe_mask = 0;
1124 unsigned int commit_max_age = (unsigned int)-1;
1125 struct reiserfs_journal *journal = SB_JOURNAL(s);
1131 rs = SB_DISK_SUPER_BLOCK(s);
1133 if (!reiserfs_parse_options
1134 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1136 for (i = 0; i < MAXQUOTAS; i++) {
1137 kfree(REISERFS_SB(s)->s_qf_names[i]);
1138 REISERFS_SB(s)->s_qf_names[i] = NULL;
1146 /* Add options that are safe here */
1147 safe_mask |= 1 << REISERFS_SMALLTAIL;
1148 safe_mask |= 1 << REISERFS_LARGETAIL;
1149 safe_mask |= 1 << REISERFS_NO_BORDER;
1150 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1151 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1152 safe_mask |= 1 << REISERFS_TEST4;
1153 safe_mask |= 1 << REISERFS_ATTRS;
1154 safe_mask |= 1 << REISERFS_XATTRS_USER;
1155 safe_mask |= 1 << REISERFS_POSIXACL;
1156 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1157 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1158 safe_mask |= 1 << REISERFS_ERROR_RO;
1159 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1160 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1161 safe_mask |= 1 << REISERFS_QUOTA;
1163 /* Update the bitmask, taking care to keep
1164 * the bits we're not allowed to change here */
1165 REISERFS_SB(s)->s_mount_opt =
1167 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1169 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1170 journal->j_max_commit_age = commit_max_age;
1171 journal->j_max_trans_age = commit_max_age;
1172 } else if (commit_max_age == 0) {
1173 /* 0 means restore defaults. */
1174 journal->j_max_commit_age = journal->j_default_max_commit_age;
1175 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1179 int rc = reiserfs_resize(s, blocks);
1184 if (*mount_flags & MS_RDONLY) {
1185 reiserfs_xattr_init(s, *mount_flags);
1186 /* remount read-only */
1187 if (s->s_flags & MS_RDONLY)
1188 /* it is read-only already */
1190 /* try to remount file system with read-only permissions */
1191 if (sb_umount_state(rs) == REISERFS_VALID_FS
1192 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1196 err = journal_begin(&th, s, 10);
1200 /* Mounting a rw partition read-only. */
1201 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1202 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1203 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1205 /* remount read-write */
1206 if (!(s->s_flags & MS_RDONLY)) {
1207 reiserfs_xattr_init(s, *mount_flags);
1208 return 0; /* We are read-write already */
1211 if (reiserfs_is_journal_aborted(journal))
1212 return journal->j_errno;
1214 handle_data_mode(s, mount_options);
1215 handle_barrier_mode(s, mount_options);
1216 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1217 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1218 err = journal_begin(&th, s, 10);
1222 /* Mount a partition which is read-only, read-write */
1223 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1224 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1225 s->s_flags &= ~MS_RDONLY;
1226 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1227 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1228 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1229 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1231 /* this will force a full flush of all journal lists */
1232 SB_JOURNAL(s)->j_must_wait = 1;
1233 err = journal_end(&th, s, 10);
1238 if (!(*mount_flags & MS_RDONLY)) {
1239 finish_unfinished(s);
1240 reiserfs_xattr_init(s, *mount_flags);
1246 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1247 * @sb - superblock for this filesystem
1248 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1250 * This routine counts how many free bits there are, finding the first zero
1251 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1252 * a loop of find_first_zero_bit() calls. This implementation is similar to
1253 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1254 * Should only be called on fs mount, but should be fairly efficient anyways.
1256 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1257 * will * invariably occupt block 0 represented in the bitmap. The only
1258 * exception to this is when free_count also == 0, since there will be no
1259 * free blocks at all.
1262 static void load_bitmap_info_data(struct super_block *sb,
1263 struct reiserfs_bitmap_info *bi)
1265 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1267 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1269 /* No need to scan if all 0's or all 1's.
1270 * Since we're only counting 0's, we can simply ignore all 1's */
1272 if (bi->first_zero_hint == 0) {
1273 bi->first_zero_hint =
1274 ((char *)cur - bi->bh->b_data) << 3;
1276 bi->free_count += sizeof(unsigned long) * 8;
1277 } else if (*cur != ~0L) {
1279 for (b = 0; b < sizeof(unsigned long) * 8; b++) {
1280 if (!reiserfs_test_le_bit(b, cur)) {
1282 if (bi->first_zero_hint == 0)
1283 bi->first_zero_hint =
1285 bi->bh->b_data) << 3) + b;
1292 #ifdef CONFIG_REISERFS_CHECK
1293 // This outputs a lot of unneded info on big FSes
1294 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1295 // bi->bh->b_blocknr, bi->free_count);
1299 static int read_bitmaps(struct super_block *s)
1304 vmalloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1305 if (SB_AP_BITMAP(s) == 0)
1307 memset(SB_AP_BITMAP(s), 0,
1308 sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1309 for (i = 0, bmap_nr =
1310 REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1311 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1312 SB_AP_BITMAP(s)[i].bh = sb_getblk(s, bmap_nr);
1313 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1314 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1316 for (i = 0; i < SB_BMAP_NR(s); i++) {
1317 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1318 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1319 reiserfs_warning(s, "sh-2029: reiserfs read_bitmaps: "
1320 "bitmap block (#%lu) reading failed",
1321 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1322 for (i = 0; i < SB_BMAP_NR(s); i++)
1323 brelse(SB_AP_BITMAP(s)[i].bh);
1324 vfree(SB_AP_BITMAP(s));
1325 SB_AP_BITMAP(s) = NULL;
1328 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1333 static int read_old_bitmaps(struct super_block *s)
1336 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1337 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1339 /* read true bitmap */
1341 vmalloc(sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1342 if (SB_AP_BITMAP(s) == 0)
1345 memset(SB_AP_BITMAP(s), 0,
1346 sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1348 for (i = 0; i < sb_bmap_nr(rs); i++) {
1349 SB_AP_BITMAP(s)[i].bh = sb_bread(s, bmp1 + i);
1350 if (!SB_AP_BITMAP(s)[i].bh)
1352 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1358 static int read_super_block(struct super_block *s, int offset)
1360 struct buffer_head *bh;
1361 struct reiserfs_super_block *rs;
1364 bh = sb_bread(s, offset / s->s_blocksize);
1366 reiserfs_warning(s, "sh-2006: read_super_block: "
1367 "bread failed (dev %s, block %lu, size %lu)",
1368 reiserfs_bdevname(s), offset / s->s_blocksize,
1373 rs = (struct reiserfs_super_block *)bh->b_data;
1374 if (!is_any_reiserfs_magic_string(rs)) {
1379 // ok, reiserfs signature (old or new) found in at the given offset
1381 fs_blocksize = sb_blocksize(rs);
1383 sb_set_blocksize(s, fs_blocksize);
1385 bh = sb_bread(s, offset / s->s_blocksize);
1387 reiserfs_warning(s, "sh-2007: read_super_block: "
1388 "bread failed (dev %s, block %lu, size %lu)\n",
1389 reiserfs_bdevname(s), offset / s->s_blocksize,
1394 rs = (struct reiserfs_super_block *)bh->b_data;
1395 if (sb_blocksize(rs) != s->s_blocksize) {
1396 reiserfs_warning(s, "sh-2011: read_super_block: "
1397 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1398 reiserfs_bdevname(s),
1399 (unsigned long long)bh->b_blocknr,
1405 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1408 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1409 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1410 "get newer reiserfsprogs package");
1414 SB_BUFFER_WITH_SB(s) = bh;
1415 SB_DISK_SUPER_BLOCK(s) = rs;
1417 if (is_reiserfs_jr(rs)) {
1418 /* magic is of non-standard journal filesystem, look at s_version to
1419 find which format is in use */
1420 if (sb_version(rs) == REISERFS_VERSION_2)
1422 "read_super_block: found reiserfs format \"3.6\""
1423 " with non-standard journal");
1424 else if (sb_version(rs) == REISERFS_VERSION_1)
1426 "read_super_block: found reiserfs format \"3.5\""
1427 " with non-standard journal");
1430 "sh-2012: read_super_block: found unknown "
1431 "format \"%u\" of reiserfs with non-standard magic",
1436 /* s_version of standard format may contain incorrect information,
1437 so we just look at the magic string */
1439 "found reiserfs format \"%s\" with standard journal\n",
1440 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1442 s->s_op = &reiserfs_sops;
1443 s->s_export_op = &reiserfs_export_ops;
1445 s->s_qcop = &reiserfs_qctl_operations;
1446 s->dq_op = &reiserfs_quota_operations;
1449 /* new format is limited by the 32 bit wide i_blocks field, want to
1450 ** be one full block below that.
1452 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1456 /* after journal replay, reread all bitmap and super blocks */
1457 static int reread_meta_blocks(struct super_block *s)
1460 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1461 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1462 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1464 "reread_meta_blocks, error reading the super");
1468 for (i = 0; i < SB_BMAP_NR(s); i++) {
1469 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh));
1470 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1471 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1473 "reread_meta_blocks, error reading bitmap block number %d at %llu",
1475 (unsigned long long)SB_AP_BITMAP(s)[i].
1484 /////////////////////////////////////////////////////
1485 // hash detection stuff
1487 // if root directory is empty - we set default - Yura's - hash and
1489 // FIXME: we look for only one name in a directory. If tea and yura
1490 // bith have the same value - we ask user to send report to the
1492 static __u32 find_hash_out(struct super_block *s)
1495 struct inode *inode;
1497 INITIALIZE_PATH(path);
1498 struct reiserfs_dir_entry de;
1499 __u32 hash = DEFAULT_HASH;
1501 inode = s->s_root->d_inode;
1503 do { // Some serious "goto"-hater was there ;)
1504 u32 teahash, r5hash, yurahash;
1506 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1507 retval = search_by_entry_key(s, &key, &path, &de);
1508 if (retval == IO_ERROR) {
1512 if (retval == NAME_NOT_FOUND)
1514 set_de_name_and_namelen(&de);
1515 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1516 /* allow override in this case */
1517 if (reiserfs_rupasov_hash(s)) {
1520 reiserfs_warning(s, "FS seems to be empty, autodetect "
1521 "is using the default hash");
1524 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1525 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1526 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1527 if (((teahash == r5hash)
1529 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1530 == r5hash)) || ((teahash == yurahash)
1532 GET_HASH_VALUE(deh_offset
1537 || ((r5hash == yurahash)
1539 GET_HASH_VALUE(deh_offset
1540 (&(de.de_deh[de.de_entry_num])))))) {
1542 "Unable to automatically detect hash function. "
1543 "Please mount with -o hash={tea,rupasov,r5}",
1544 reiserfs_bdevname(s));
1548 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1551 else if (GET_HASH_VALUE
1552 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1554 else if (GET_HASH_VALUE
1555 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1558 reiserfs_warning(s, "Unrecognised hash function");
1567 // finds out which hash names are sorted with
1568 static int what_hash(struct super_block *s)
1572 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1574 /* reiserfs_hash_detect() == true if any of the hash mount options
1575 ** were used. We must check them to make sure the user isn't
1576 ** using a bad hash value
1578 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1579 code = find_hash_out(s);
1581 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1582 /* detection has found the hash, and we must check against the
1585 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1586 reiserfs_warning(s, "Error, %s hash detected, "
1587 "unable to force rupasov hash",
1588 reiserfs_hashname(code));
1590 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1591 reiserfs_warning(s, "Error, %s hash detected, "
1592 "unable to force tea hash",
1593 reiserfs_hashname(code));
1595 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1596 reiserfs_warning(s, "Error, %s hash detected, "
1597 "unable to force r5 hash",
1598 reiserfs_hashname(code));
1602 /* find_hash_out was not called or could not determine the hash */
1603 if (reiserfs_rupasov_hash(s)) {
1605 } else if (reiserfs_tea_hash(s)) {
1607 } else if (reiserfs_r5_hash(s)) {
1612 /* if we are mounted RW, and we have a new valid hash code, update
1615 if (code != UNSET_HASH &&
1616 !(s->s_flags & MS_RDONLY) &&
1617 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1618 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1623 // return pointer to appropriate function
1624 static hashf_t hash_function(struct super_block *s)
1626 switch (what_hash(s)) {
1628 reiserfs_info(s, "Using tea hash to sort names\n");
1631 reiserfs_info(s, "Using rupasov hash to sort names\n");
1634 reiserfs_info(s, "Using r5 hash to sort names\n");
1640 // this is used to set up correct value for old partitions
1641 static int function2code(hashf_t func)
1643 if (func == keyed_hash)
1645 if (func == yura_hash)
1647 if (func == r5_hash)
1650 BUG(); // should never happen
1655 #define SWARN(silent, s, ...) \
1657 reiserfs_warning (s, __VA_ARGS__)
1659 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1661 struct inode *root_inode;
1663 struct reiserfs_transaction_handle th;
1665 unsigned long blocks;
1666 unsigned int commit_max_age = 0;
1668 struct reiserfs_iget_args args;
1669 struct reiserfs_super_block *rs;
1671 struct reiserfs_sb_info *sbi;
1672 int errval = -EINVAL;
1674 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1680 memset(sbi, 0, sizeof(struct reiserfs_sb_info));
1681 /* Set default values for options: non-aggressive tails, RO on errors */
1682 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1683 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1684 /* no preallocation minimum, be smart in
1685 reiserfs_file_write instead */
1686 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1687 /* Preallocate by 16 blocks (17-1) at once */
1688 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1689 /* Initialize the rwsem for xattr dir */
1690 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1692 /* setup default block allocator options */
1693 reiserfs_init_alloc_options(s);
1696 if (reiserfs_parse_options
1697 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1698 &commit_max_age) == 0) {
1703 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1704 "for remount only");
1708 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1709 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1711 /* try new format (64-th 1k block), which can contain reiserfs super block */
1712 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1714 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1715 reiserfs_bdevname(s));
1719 rs = SB_DISK_SUPER_BLOCK(s);
1720 /* Let's do basic sanity check to verify that underlying device is not
1721 smaller than the filesystem. If the check fails then abort and scream,
1722 because bad stuff will happen otherwise. */
1723 if (s->s_bdev && s->s_bdev->bd_inode
1724 && i_size_read(s->s_bdev->bd_inode) <
1725 sb_block_count(rs) * sb_blocksize(rs)) {
1727 "Filesystem on %s cannot be mounted because it is bigger than the device",
1728 reiserfs_bdevname(s));
1730 "You may need to run fsck or increase size of your LVM partition");
1732 "Or may be you forgot to reboot after fdisk when it told you to");
1736 sbi->s_mount_state = SB_REISERFS_STATE(s);
1737 sbi->s_mount_state = REISERFS_VALID_FS;
1739 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1741 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1744 #ifdef CONFIG_REISERFS_CHECK
1745 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1746 SWARN(silent, s, "- it is slow mode for debugging.");
1749 /* make data=ordered the default */
1750 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1751 !reiserfs_data_writeback(s)) {
1752 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1755 if (reiserfs_data_log(s)) {
1756 reiserfs_info(s, "using journaled data mode\n");
1757 } else if (reiserfs_data_ordered(s)) {
1758 reiserfs_info(s, "using ordered data mode\n");
1760 reiserfs_info(s, "using writeback data mode\n");
1762 if (reiserfs_barrier_flush(s)) {
1763 printk("reiserfs: using flush barriers\n");
1765 // set_device_ro(s->s_dev, 1) ;
1766 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1768 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1771 jinit_done = 1; /* once this is set, journal_release must be called
1772 ** if we error out of the mount
1775 if (reread_meta_blocks(s)) {
1777 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1784 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1786 "clm-7000: Detected readonly device, marking FS readonly");
1787 s->s_flags |= MS_RDONLY;
1789 args.objectid = REISERFS_ROOT_OBJECTID;
1790 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1792 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1793 reiserfs_init_locked_inode, (void *)(&args));
1796 "jmacd-10: reiserfs_fill_super: get root inode failed");
1800 if (root_inode->i_state & I_NEW) {
1801 reiserfs_read_locked_inode(root_inode, &args);
1802 unlock_new_inode(root_inode);
1805 s->s_root = d_alloc_root(root_inode);
1810 // define and initialize hash function
1811 sbi->s_hash_function = hash_function(s);
1812 if (sbi->s_hash_function == NULL) {
1818 if (is_reiserfs_3_5(rs)
1819 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1820 set_bit(REISERFS_3_5, &(sbi->s_properties));
1822 set_bit(REISERFS_3_6, &(sbi->s_properties));
1824 if (!(s->s_flags & MS_RDONLY)) {
1826 errval = journal_begin(&th, s, 1);
1832 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1834 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1835 set_sb_fs_state(rs, 0);
1837 if (old_format_only(s)) {
1838 /* filesystem of format 3.5 either with standard or non-standard
1840 if (convert_reiserfs(s)) {
1841 /* and -o conv is given */
1844 "converting 3.5 filesystem to the 3.6 format");
1846 if (is_reiserfs_3_5(rs))
1847 /* put magic string of 3.6 format. 2.2 will not be able to
1848 mount this filesystem anymore */
1849 memcpy(rs->s_v1.s_magic,
1850 reiserfs_3_6_magic_string,
1852 (reiserfs_3_6_magic_string));
1854 set_sb_version(rs, REISERFS_VERSION_2);
1855 reiserfs_convert_objectid_map_v1(s);
1856 set_bit(REISERFS_3_6, &(sbi->s_properties));
1857 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1858 } else if (!silent) {
1859 reiserfs_info(s, "using 3.5.x disk format\n");
1863 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1864 errval = journal_end(&th, s, 1);
1871 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1877 /* look for files which were to be removed in previous session */
1878 finish_unfinished(s);
1880 if (old_format_only(s) && !silent) {
1881 reiserfs_info(s, "using 3.5.x disk format\n");
1884 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1890 // mark hash in super block: it could be unset. overwrite should be ok
1891 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1895 reiserfs_proc_info_init(s);
1897 init_waitqueue_head(&(sbi->s_wait));
1898 spin_lock_init(&sbi->bitmap_lock);
1903 if (jinit_done) { /* kill the commit thread, free journal ram */
1904 journal_release_error(NULL, s);
1906 if (SB_DISK_SUPER_BLOCK(s)) {
1907 for (j = 0; j < SB_BMAP_NR(s); j++) {
1908 if (SB_AP_BITMAP(s))
1909 brelse(SB_AP_BITMAP(s)[j].bh);
1911 vfree(SB_AP_BITMAP(s));
1913 if (SB_BUFFER_WITH_SB(s))
1914 brelse(SB_BUFFER_WITH_SB(s));
1916 for (j = 0; j < MAXQUOTAS; j++) {
1917 kfree(sbi->s_qf_names[j]);
1918 sbi->s_qf_names[j] = NULL;
1923 s->s_fs_info = NULL;
1927 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1929 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1931 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1932 buf->f_bfree = sb_free_blocks(rs);
1933 buf->f_bavail = buf->f_bfree;
1934 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1935 buf->f_bsize = dentry->d_sb->s_blocksize;
1936 /* changed to accommodate gcc folks. */
1937 buf->f_type = REISERFS_SUPER_MAGIC;
1942 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1944 struct reiserfs_transaction_handle th;
1947 /* We may create quota structure so we need to reserve enough blocks */
1948 reiserfs_write_lock(inode->i_sb);
1950 journal_begin(&th, inode->i_sb,
1951 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1954 ret = dquot_initialize(inode, type);
1956 journal_end(&th, inode->i_sb,
1957 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1961 reiserfs_write_unlock(inode->i_sb);
1965 static int reiserfs_dquot_drop(struct inode *inode)
1967 struct reiserfs_transaction_handle th;
1970 /* We may delete quota structure so we need to reserve enough blocks */
1971 reiserfs_write_lock(inode->i_sb);
1973 journal_begin(&th, inode->i_sb,
1974 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1977 ret = dquot_drop(inode);
1979 journal_end(&th, inode->i_sb,
1980 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1984 reiserfs_write_unlock(inode->i_sb);
1988 static int reiserfs_write_dquot(struct dquot *dquot)
1990 struct reiserfs_transaction_handle th;
1993 reiserfs_write_lock(dquot->dq_sb);
1995 journal_begin(&th, dquot->dq_sb,
1996 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1999 ret = dquot_commit(dquot);
2001 journal_end(&th, dquot->dq_sb,
2002 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2006 reiserfs_write_unlock(dquot->dq_sb);
2010 static int reiserfs_acquire_dquot(struct dquot *dquot)
2012 struct reiserfs_transaction_handle th;
2015 reiserfs_write_lock(dquot->dq_sb);
2017 journal_begin(&th, dquot->dq_sb,
2018 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2021 ret = dquot_acquire(dquot);
2023 journal_end(&th, dquot->dq_sb,
2024 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2028 reiserfs_write_unlock(dquot->dq_sb);
2032 static int reiserfs_release_dquot(struct dquot *dquot)
2034 struct reiserfs_transaction_handle th;
2037 reiserfs_write_lock(dquot->dq_sb);
2039 journal_begin(&th, dquot->dq_sb,
2040 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2043 ret = dquot_release(dquot);
2045 journal_end(&th, dquot->dq_sb,
2046 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2050 reiserfs_write_unlock(dquot->dq_sb);
2054 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2056 /* Are we journalling quotas? */
2057 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2058 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2059 dquot_mark_dquot_dirty(dquot);
2060 return reiserfs_write_dquot(dquot);
2062 return dquot_mark_dquot_dirty(dquot);
2065 static int reiserfs_write_info(struct super_block *sb, int type)
2067 struct reiserfs_transaction_handle th;
2070 /* Data block + inode block */
2071 reiserfs_write_lock(sb);
2072 ret = journal_begin(&th, sb, 2);
2075 ret = dquot_commit_info(sb, type);
2076 err = journal_end(&th, sb, 2);
2080 reiserfs_write_unlock(sb);
2085 * Turn on quotas during mount time - we need to find the quota file and such...
2087 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2089 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2090 REISERFS_SB(sb)->s_jquota_fmt, type);
2094 * Standard function to be called on quota_on
2096 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2100 struct nameidata nd;
2102 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2104 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2107 /* Quotafile not on the same filesystem? */
2108 if (nd.mnt->mnt_sb != sb) {
2112 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2113 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2114 reiserfs_warning(sb,
2115 "reiserfs: Quota file must have tail packing disabled.");
2119 /* Not journalling quota? No more tests needed... */
2120 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2121 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2123 return vfs_quota_on(sb, type, format_id, path);
2125 /* Quotafile not of fs root? */
2126 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2127 reiserfs_warning(sb,
2128 "reiserfs: Quota file not on filesystem root. "
2129 "Journalled quota will not work.");
2131 return vfs_quota_on(sb, type, format_id, path);
2134 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2135 * acquiring the locks... As quota files are never truncated and quota code
2136 * itself serializes the operations (and noone else should touch the files)
2137 * we don't have to be afraid of races */
2138 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2139 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;
2145 struct buffer_head tmp_bh, *bh;
2146 loff_t i_size = i_size_read(inode);
2150 if (off + len > i_size)
2153 while (toread > 0) {
2155 sb->s_blocksize - offset <
2156 toread ? sb->s_blocksize - offset : toread;
2158 /* Quota files are without tails so we can safely use this function */
2159 reiserfs_write_lock(sb);
2160 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2161 reiserfs_write_unlock(sb);
2164 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2165 memset(data, 0, tocopy);
2167 bh = sb_bread(sb, tmp_bh.b_blocknr);
2170 memcpy(data, bh->b_data + offset, tocopy);
2181 /* Write to quotafile (we know the transaction is already started and has
2182 * enough credits) */
2183 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2184 const char *data, size_t len, loff_t off)
2186 struct inode *inode = sb_dqopt(sb)->files[type];
2187 unsigned long blk = off >> sb->s_blocksize_bits;
2188 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2189 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2190 size_t towrite = len;
2191 struct buffer_head tmp_bh, *bh;
2193 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2194 while (towrite > 0) {
2195 tocopy = sb->s_blocksize - offset < towrite ?
2196 sb->s_blocksize - offset : towrite;
2198 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2201 if (offset || tocopy != sb->s_blocksize)
2202 bh = sb_bread(sb, tmp_bh.b_blocknr);
2204 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2210 memcpy(bh->b_data + offset, data, tocopy);
2211 flush_dcache_page(bh->b_page);
2212 set_buffer_uptodate(bh);
2214 reiserfs_prepare_for_journal(sb, bh, 1);
2215 journal_mark_dirty(current->journal_info, sb, bh);
2217 reiserfs_add_ordered_list(inode, bh);
2227 if (inode->i_size < off + len - towrite)
2228 i_size_write(inode, off + len - towrite);
2230 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2231 mark_inode_dirty(inode);
2232 mutex_unlock(&inode->i_mutex);
2233 return len - towrite;
2238 static int get_super_block(struct file_system_type *fs_type,
2239 int flags, const char *dev_name,
2240 void *data, struct vfsmount *mnt)
2242 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2246 static int __init init_reiserfs_fs(void)
2250 if ((ret = init_inodecache())) {
2254 if ((ret = reiserfs_xattr_register_handlers()))
2255 goto failed_reiserfs_xattr_register_handlers;
2257 reiserfs_proc_info_global_init();
2258 reiserfs_proc_register_global("version",
2259 reiserfs_global_version_in_proc);
2261 ret = register_filesystem(&reiserfs_fs_type);
2267 reiserfs_xattr_unregister_handlers();
2269 failed_reiserfs_xattr_register_handlers:
2270 reiserfs_proc_unregister_global("version");
2271 reiserfs_proc_info_global_done();
2272 destroy_inodecache();
2277 static void __exit exit_reiserfs_fs(void)
2279 reiserfs_xattr_unregister_handlers();
2280 reiserfs_proc_unregister_global("version");
2281 reiserfs_proc_info_global_done();
2282 unregister_filesystem(&reiserfs_fs_type);
2283 destroy_inodecache();
2286 struct file_system_type reiserfs_fs_type = {
2287 .owner = THIS_MODULE,
2289 .get_sb = get_super_block,
2290 .kill_sb = kill_block_super,
2291 .fs_flags = FS_REQUIRES_DEV,
2294 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2295 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2296 MODULE_LICENSE("GPL");
2298 module_init(init_reiserfs_fs);
2299 module_exit(exit_reiserfs_fs);