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/vfs.h>
25 #include <linux/mnt_namespace.h>
26 #include <linux/mount.h>
27 #include <linux/namei.h>
28 #include <linux/quotaops.h>
30 struct file_system_type reiserfs_fs_type;
32 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
33 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
34 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
36 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
38 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
39 strlen(reiserfs_3_5_magic_string));
42 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
44 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
45 strlen(reiserfs_3_6_magic_string));
48 int is_reiserfs_jr(struct reiserfs_super_block *rs)
50 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
51 strlen(reiserfs_jr_magic_string));
54 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
56 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
60 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
61 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
63 static int reiserfs_sync_fs(struct super_block *s, int wait)
65 if (!(s->s_flags & MS_RDONLY)) {
66 struct reiserfs_transaction_handle th;
67 reiserfs_write_lock(s);
68 if (!journal_begin(&th, s, 1))
69 if (!journal_end_sync(&th, s, 1))
70 reiserfs_flush_old_commits(s);
71 s->s_dirt = 0; /* Even if it's not true.
72 * We'll loop forever in sync_supers otherwise */
73 reiserfs_write_unlock(s);
80 static void reiserfs_write_super(struct super_block *s)
82 reiserfs_sync_fs(s, 1);
85 static void reiserfs_write_super_lockfs(struct super_block *s)
87 struct reiserfs_transaction_handle th;
88 reiserfs_write_lock(s);
89 if (!(s->s_flags & MS_RDONLY)) {
90 int err = journal_begin(&th, s, 1);
92 reiserfs_block_writes(&th);
94 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
96 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
97 reiserfs_block_writes(&th);
98 journal_end_sync(&th, s, 1);
102 reiserfs_write_unlock(s);
105 static void reiserfs_unlockfs(struct super_block *s)
107 reiserfs_allow_writes(s);
110 extern const struct in_core_key MAX_IN_CORE_KEY;
112 /* this is used to delete "save link" when there are no items of a
113 file it points to. It can either happen if unlink is completed but
114 "save unlink" removal, or if file has both unlink and truncate
115 pending and as unlink completes first (because key of "save link"
116 protecting unlink is bigger that a key lf "save link" which
117 protects truncate), so there left no items to make truncate
119 static int remove_save_link_only(struct super_block *s,
120 struct reiserfs_key *key, int oid_free)
122 struct reiserfs_transaction_handle th;
125 /* we are going to do one balancing */
126 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
130 reiserfs_delete_solid_item(&th, NULL, key);
132 /* removals are protected by direct items */
133 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
135 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
139 static int reiserfs_quota_on_mount(struct super_block *, int);
142 /* look for uncompleted unlinks and truncates and complete them */
143 static int finish_unfinished(struct super_block *s)
145 INITIALIZE_PATH(path);
146 struct cpu_key max_cpu_key, obj_key;
147 struct reiserfs_key save_link_key;
149 struct item_head *ih;
150 struct buffer_head *bh;
161 /* compose key to look for "save" links */
162 max_cpu_key.version = KEY_FORMAT_3_5;
163 max_cpu_key.on_disk_key.k_dir_id = ~0U;
164 max_cpu_key.on_disk_key.k_objectid = ~0U;
165 set_cpu_key_k_offset(&max_cpu_key, ~0U);
166 max_cpu_key.key_length = 3;
169 /* Needed for iput() to work correctly and not trash data */
170 if (s->s_flags & MS_ACTIVE) {
174 s->s_flags |= MS_ACTIVE;
176 /* Turn on quotas so that they are updated correctly */
177 for (i = 0; i < MAXQUOTAS; i++) {
178 if (REISERFS_SB(s)->s_qf_names[i]) {
179 int ret = reiserfs_quota_on_mount(s, i);
182 "reiserfs: cannot turn on journalled quota: error %d",
189 REISERFS_SB(s)->s_is_unlinked_ok = 1;
191 retval = search_item(s, &max_cpu_key, &path);
192 if (retval != ITEM_NOT_FOUND) {
194 "vs-2140: finish_unfinished: search_by_key returned %d",
199 bh = get_last_bh(&path);
200 item_pos = get_item_pos(&path);
201 if (item_pos != B_NR_ITEMS(bh)) {
203 "vs-2060: finish_unfinished: wrong position found");
207 ih = B_N_PITEM_HEAD(bh, item_pos);
209 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
210 /* there are no "save" links anymore */
213 save_link_key = ih->ih_key;
214 if (is_indirect_le_ih(ih))
219 /* reiserfs_iget needs k_dirid and k_objectid only */
220 item = B_I_PITEM(bh, ih);
221 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
222 obj_key.on_disk_key.k_objectid =
223 le32_to_cpu(ih->ih_key.k_objectid);
224 obj_key.on_disk_key.k_offset = 0;
225 obj_key.on_disk_key.k_type = 0;
229 inode = reiserfs_iget(s, &obj_key);
231 /* the unlink almost completed, it just did not manage to remove
232 "save" link and release objectid */
234 "vs-2180: finish_unfinished: iget failed for %K",
236 retval = remove_save_link_only(s, &save_link_key, 1);
240 if (!truncate && inode->i_nlink) {
241 /* file is not unlinked */
243 "vs-2185: finish_unfinished: file %K is not unlinked",
245 retval = remove_save_link_only(s, &save_link_key, 0);
250 if (truncate && S_ISDIR(inode->i_mode)) {
251 /* We got a truncate request for a dir which is impossible.
252 The only imaginable way is to execute unfinished truncate request
253 then boot into old kernel, remove the file and create dir with
256 "green-2101: impossible truncate on a directory %k. Please report",
258 retval = remove_save_link_only(s, &save_link_key, 0);
265 REISERFS_I(inode)->i_flags |=
266 i_link_saved_truncate_mask;
267 /* not completed truncate found. New size was committed together
269 reiserfs_info(s, "Truncating %k to %Ld ..",
270 INODE_PKEY(inode), inode->i_size);
271 reiserfs_truncate_file(inode,
273 /*don't update modification time */
275 retval = remove_save_link(inode, truncate);
277 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
278 /* not completed unlink (rmdir) found */
279 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
280 /* removal gets completed in iput */
288 REISERFS_SB(s)->s_is_unlinked_ok = 0;
291 /* Turn quotas off */
292 for (i = 0; i < MAXQUOTAS; i++) {
293 if (sb_dqopt(s)->files[i])
294 vfs_quota_off_mount(s, i);
297 /* Restore the flag back */
298 s->s_flags &= ~MS_ACTIVE;
302 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
303 "Completed\n", done);
307 /* to protect file being unlinked from getting lost we "safe" link files
308 being unlinked. This link will be deleted in the same transaction with last
309 item of file. mounting the filesytem we scan all these links and remove
310 files which almost got lost */
311 void add_save_link(struct reiserfs_transaction_handle *th,
312 struct inode *inode, int truncate)
314 INITIALIZE_PATH(path);
320 BUG_ON(!th->t_trans_id);
322 /* file can only get one "save link" of each kind */
324 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
325 "saved link already exists for truncated inode %lx",
328 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
329 "saved link already exists for unlinked inode %lx",
332 /* setup key of "save" link */
333 key.version = KEY_FORMAT_3_5;
334 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
335 key.on_disk_key.k_objectid = inode->i_ino;
337 /* unlink, rmdir, rename */
338 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
339 set_cpu_key_k_type(&key, TYPE_DIRECT);
341 /* item head of "safe" link */
342 make_le_item_head(&ih, &key, key.version,
343 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
344 4 /*length */ , 0xffff /*free space */ );
347 if (S_ISDIR(inode->i_mode))
348 reiserfs_warning(inode->i_sb,
349 "green-2102: Adding a truncate savelink for a directory %k! Please report",
351 set_cpu_key_k_offset(&key, 1);
352 set_cpu_key_k_type(&key, TYPE_INDIRECT);
354 /* item head of "safe" link */
355 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
356 4 /*length */ , 0 /*free space */ );
360 /* look for its place in the tree */
361 retval = search_item(inode->i_sb, &key, &path);
362 if (retval != ITEM_NOT_FOUND) {
363 if (retval != -ENOSPC)
364 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
365 "search_by_key (%K) returned %d", &key,
371 /* body of "save" link */
372 link = INODE_PKEY(inode)->k_dir_id;
374 /* put "save" link inot tree, don't charge quota to anyone */
376 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
378 if (retval != -ENOSPC)
379 reiserfs_warning(inode->i_sb,
380 "vs-2120: add_save_link: insert_item returned %d",
384 REISERFS_I(inode)->i_flags |=
385 i_link_saved_truncate_mask;
387 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
391 /* this opens transaction unlike add_save_link */
392 int remove_save_link(struct inode *inode, int truncate)
394 struct reiserfs_transaction_handle th;
395 struct reiserfs_key key;
398 /* we are going to do one balancing only */
399 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
403 /* setup key of "save" link */
404 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
405 key.k_objectid = INODE_PKEY(inode)->k_objectid;
407 /* unlink, rmdir, rename */
408 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
409 1 + inode->i_sb->s_blocksize);
410 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
413 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
414 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
418 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
420 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
421 /* don't take quota bytes from anywhere */
422 reiserfs_delete_solid_item(&th, NULL, &key);
424 reiserfs_release_objectid(&th, inode->i_ino);
425 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
427 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
429 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
432 static void reiserfs_kill_sb(struct super_block *s)
434 if (REISERFS_SB(s)) {
435 #ifdef CONFIG_REISERFS_FS_XATTR
436 if (REISERFS_SB(s)->xattr_root) {
437 d_invalidate(REISERFS_SB(s)->xattr_root);
438 dput(REISERFS_SB(s)->xattr_root);
439 REISERFS_SB(s)->xattr_root = NULL;
442 if (REISERFS_SB(s)->priv_root) {
443 d_invalidate(REISERFS_SB(s)->priv_root);
444 dput(REISERFS_SB(s)->priv_root);
445 REISERFS_SB(s)->priv_root = NULL;
452 static void reiserfs_put_super(struct super_block *s)
454 struct reiserfs_transaction_handle th;
457 /* change file system state to current state if it was mounted with read-write permissions */
458 if (!(s->s_flags & MS_RDONLY)) {
459 if (!journal_begin(&th, s, 10)) {
460 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
462 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
463 REISERFS_SB(s)->s_mount_state);
464 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
468 /* note, journal_release checks for readonly mount, and can decide not
469 ** to do a journal_end
471 journal_release(&th, s);
473 reiserfs_free_bitmap_cache(s);
475 brelse(SB_BUFFER_WITH_SB(s));
479 if (REISERFS_SB(s)->reserved_blocks != 0) {
481 "green-2005: reiserfs_put_super: reserved blocks left %d",
482 REISERFS_SB(s)->reserved_blocks);
485 reiserfs_proc_info_done(s);
493 static struct kmem_cache *reiserfs_inode_cachep;
495 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
497 struct reiserfs_inode_info *ei;
498 ei = (struct reiserfs_inode_info *)
499 kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
502 return &ei->vfs_inode;
505 static void reiserfs_destroy_inode(struct inode *inode)
507 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
510 static void init_once(void *foo, struct kmem_cache * cachep, unsigned long flags)
512 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
514 if (flags & SLAB_CTOR_CONSTRUCTOR) {
515 INIT_LIST_HEAD(&ei->i_prealloc_list);
516 inode_init_once(&ei->vfs_inode);
517 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
518 ei->i_acl_access = NULL;
519 ei->i_acl_default = NULL;
524 static int init_inodecache(void)
526 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
528 reiserfs_inode_info),
529 0, (SLAB_RECLAIM_ACCOUNT|
532 if (reiserfs_inode_cachep == NULL)
537 static void destroy_inodecache(void)
539 kmem_cache_destroy(reiserfs_inode_cachep);
542 /* we don't mark inodes dirty, we just log them */
543 static void reiserfs_dirty_inode(struct inode *inode)
545 struct reiserfs_transaction_handle th;
548 if (inode->i_sb->s_flags & MS_RDONLY) {
549 reiserfs_warning(inode->i_sb,
550 "clm-6006: writing inode %lu on readonly FS",
554 reiserfs_write_lock(inode->i_sb);
556 /* this is really only used for atime updates, so they don't have
557 ** to be included in O_SYNC or fsync
559 err = journal_begin(&th, inode->i_sb, 1);
561 reiserfs_write_unlock(inode->i_sb);
564 reiserfs_update_sd(&th, inode);
565 journal_end(&th, inode->i_sb, 1);
566 reiserfs_write_unlock(inode->i_sb);
569 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
570 static void reiserfs_clear_inode(struct inode *inode)
572 struct posix_acl *acl;
574 acl = REISERFS_I(inode)->i_acl_access;
575 if (acl && !IS_ERR(acl))
576 posix_acl_release(acl);
577 REISERFS_I(inode)->i_acl_access = NULL;
579 acl = REISERFS_I(inode)->i_acl_default;
580 if (acl && !IS_ERR(acl))
581 posix_acl_release(acl);
582 REISERFS_I(inode)->i_acl_default = NULL;
585 #define reiserfs_clear_inode NULL
589 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
591 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
595 static const struct super_operations reiserfs_sops = {
596 .alloc_inode = reiserfs_alloc_inode,
597 .destroy_inode = reiserfs_destroy_inode,
598 .write_inode = reiserfs_write_inode,
599 .dirty_inode = reiserfs_dirty_inode,
600 .delete_inode = reiserfs_delete_inode,
601 .clear_inode = reiserfs_clear_inode,
602 .put_super = reiserfs_put_super,
603 .write_super = reiserfs_write_super,
604 .sync_fs = reiserfs_sync_fs,
605 .write_super_lockfs = reiserfs_write_super_lockfs,
606 .unlockfs = reiserfs_unlockfs,
607 .statfs = reiserfs_statfs,
608 .remount_fs = reiserfs_remount,
610 .quota_read = reiserfs_quota_read,
611 .quota_write = reiserfs_quota_write,
616 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
618 static int reiserfs_dquot_initialize(struct inode *, int);
619 static int reiserfs_dquot_drop(struct inode *);
620 static int reiserfs_write_dquot(struct dquot *);
621 static int reiserfs_acquire_dquot(struct dquot *);
622 static int reiserfs_release_dquot(struct dquot *);
623 static int reiserfs_mark_dquot_dirty(struct dquot *);
624 static int reiserfs_write_info(struct super_block *, int);
625 static int reiserfs_quota_on(struct super_block *, int, int, char *);
627 static struct dquot_operations reiserfs_quota_operations = {
628 .initialize = reiserfs_dquot_initialize,
629 .drop = reiserfs_dquot_drop,
630 .alloc_space = dquot_alloc_space,
631 .alloc_inode = dquot_alloc_inode,
632 .free_space = dquot_free_space,
633 .free_inode = dquot_free_inode,
634 .transfer = dquot_transfer,
635 .write_dquot = reiserfs_write_dquot,
636 .acquire_dquot = reiserfs_acquire_dquot,
637 .release_dquot = reiserfs_release_dquot,
638 .mark_dirty = reiserfs_mark_dquot_dirty,
639 .write_info = reiserfs_write_info,
642 static struct quotactl_ops reiserfs_qctl_operations = {
643 .quota_on = reiserfs_quota_on,
644 .quota_off = vfs_quota_off,
645 .quota_sync = vfs_quota_sync,
646 .get_info = vfs_get_dqinfo,
647 .set_info = vfs_set_dqinfo,
648 .get_dqblk = vfs_get_dqblk,
649 .set_dqblk = vfs_set_dqblk,
653 static struct export_operations reiserfs_export_ops = {
654 .encode_fh = reiserfs_encode_fh,
655 .decode_fh = reiserfs_decode_fh,
656 .get_parent = reiserfs_get_parent,
657 .get_dentry = reiserfs_get_dentry,
660 /* this struct is used in reiserfs_getopt () for containing the value for those
661 mount options that have values rather than being toggles. */
664 int setmask; /* bitmask which is to set on mount_options bitmask when this
665 value is found, 0 is no bits are to be changed. */
666 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
667 value is found, 0 is no bits are to be changed. This is
668 applied BEFORE setmask */
671 /* Set this bit in arg_required to allow empty arguments */
672 #define REISERFS_OPT_ALLOWEMPTY 31
674 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
678 int arg_required; /* 0 if argument is not required, not 0 otherwise */
679 const arg_desc_t *values; /* list of values accepted by an option */
680 int setmask; /* bitmask which is to set on mount_options bitmask when this
681 value is found, 0 is no bits are to be changed. */
682 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
683 value is found, 0 is no bits are to be changed. This is
684 applied BEFORE setmask */
687 /* possible values for -o data= */
688 static const arg_desc_t logging_mode[] = {
689 {"ordered", 1 << REISERFS_DATA_ORDERED,
690 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
691 {"journal", 1 << REISERFS_DATA_LOG,
692 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
693 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
694 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
698 /* possible values for -o barrier= */
699 static const arg_desc_t barrier_mode[] = {
700 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
701 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
705 /* possible values for "-o block-allocator=" and bits which are to be set in
706 s_mount_opt of reiserfs specific part of in-core super block */
707 static const arg_desc_t balloc[] = {
708 {"noborder", 1 << REISERFS_NO_BORDER, 0},
709 {"border", 0, 1 << REISERFS_NO_BORDER},
710 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
711 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
712 {"test4", 1 << REISERFS_TEST4, 0},
713 {"notest4", 0, 1 << REISERFS_TEST4},
717 static const arg_desc_t tails[] = {
718 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
719 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
720 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
724 static const arg_desc_t error_actions[] = {
725 {"panic", 1 << REISERFS_ERROR_PANIC,
726 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
727 {"ro-remount", 1 << REISERFS_ERROR_RO,
728 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
729 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
730 {"continue", 1 << REISERFS_ERROR_CONTINUE,
731 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
736 /* proceed only one option from a list *cur - string containing of mount options
737 opts - array of options which are accepted
738 opt_arg - if option is found and requires an argument and if it is specifed
739 in the input - pointer to the argument is stored here
740 bit_flags - if option requires to set a certain bit - it is set here
741 return -1 if unknown option is found, opt->arg_required otherwise */
742 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
743 char **opt_arg, unsigned long *bit_flags)
752 const opt_desc_t *opt;
753 const arg_desc_t *arg;
757 /* assume argument cannot contain commas */
758 *cur = strchr(p, ',');
764 if (!strncmp(p, "alloc=", 6)) {
765 /* Ugly special case, probably we should redo options parser so that
766 it can understand several arguments for some options, also so that
767 it can fill several bitfields with option values. */
768 if (reiserfs_parse_alloc_options(s, p + 6)) {
775 /* for every option in the list */
776 for (opt = opts; opt->option_name; opt++) {
777 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
780 (1 << REISERFS_UNSUPPORTED_OPT))
781 reiserfs_warning(s, "%s not supported.",
784 *bit_flags &= ~opt->clrmask;
786 (1 << REISERFS_UNSUPPORTED_OPT))
787 reiserfs_warning(s, "%s not supported.",
790 *bit_flags |= opt->setmask;
795 if (!opt->option_name) {
796 reiserfs_warning(s, "unknown mount option \"%s\"", p);
800 p += strlen(opt->option_name);
803 if (!opt->arg_required) {
805 "the option \"%s\" does not require an argument",
812 if (opt->arg_required) {
814 "the option \"%s\" requires an argument",
820 reiserfs_warning(s, "head of option \"%s\" is only correct",
825 /* move to the argument, or to next option if argument is not required */
828 if (opt->arg_required
829 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
831 /* this catches "option=," if not allowed */
832 reiserfs_warning(s, "empty argument for \"%s\"",
838 /* *=NULLopt_arg contains pointer to argument */
840 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
843 /* values possible for this option are listed in opt->values */
844 for (arg = opt->values; arg->value; arg++) {
845 if (!strcmp(p, arg->value)) {
847 *bit_flags &= ~arg->clrmask;
848 *bit_flags |= arg->setmask;
850 return opt->arg_required;
854 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
859 /* returns 0 if something is wrong in option string, 1 - otherwise */
860 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
861 unsigned long *mount_options,
862 /* after the parsing phase, contains the
863 collection of bitflags defining what
864 mount options were selected. */
865 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
867 unsigned int *commit_max_age)
872 opt_desc_t opts[] = {
873 /* Compatibility stuff, so that -o notail for old setups still work */
874 {"tails",.arg_required = 't',.values = tails},
876 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
877 {"conv",.setmask = 1 << REISERFS_CONVERT},
878 {"attrs",.setmask = 1 << REISERFS_ATTRS},
879 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
880 #ifdef CONFIG_REISERFS_FS_XATTR
881 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
882 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
884 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
885 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
887 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
888 {"acl",.setmask = 1 << REISERFS_POSIXACL},
889 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
891 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
892 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
894 {.option_name = "nolog"},
895 {"replayonly",.setmask = 1 << REPLAYONLY},
896 {"block-allocator",.arg_required = 'a',.values = balloc},
897 {"data",.arg_required = 'd',.values = logging_mode},
898 {"barrier",.arg_required = 'b',.values = barrier_mode},
899 {"resize",.arg_required = 'r',.values = NULL},
900 {"jdev",.arg_required = 'j',.values = NULL},
901 {"nolargeio",.arg_required = 'w',.values = NULL},
902 {"commit",.arg_required = 'c',.values = NULL},
903 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
904 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
905 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
906 {"errors",.arg_required = 'e',.values = error_actions},
907 {"usrjquota",.arg_required =
908 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
909 {"grpjquota",.arg_required =
910 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
911 {"jqfmt",.arg_required = 'f',.values = NULL},
912 {.option_name = NULL}
916 if (!options || !*options)
917 /* use default configuration: create tails, journaling on, no
918 conversion to newest format */
921 for (pos = options; pos;) {
922 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
924 /* wrong option is given */
931 /* "resize=NNN" or "resize=auto" */
933 if (!strcmp(arg, "auto")) {
934 /* From JFS code, to auto-get the size. */
936 s->s_bdev->bd_inode->i_size >> s->
939 *blocks = simple_strtoul(arg, &p, 0);
941 /* NNN does not look like a number */
943 "reiserfs_parse_options: bad value %s",
952 unsigned long val = simple_strtoul(arg, &p, 0);
953 /* commit=NNN (time in seconds) */
954 if (*p != '\0' || val >= (unsigned int)-1) {
956 "reiserfs_parse_options: bad value %s",
960 *commit_max_age = (unsigned int)val;
964 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
969 if (arg && *arg && jdev_name) {
970 if (*jdev_name) { //Hm, already assigned?
972 "reiserfs_parse_options: journal device was already specified to be %s",
980 if (c == 'u' || c == 'g') {
981 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
983 if (sb_any_quota_enabled(s)) {
985 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
988 if (*arg) { /* Some filename specified? */
989 if (REISERFS_SB(s)->s_qf_names[qtype]
990 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
993 "reiserfs_parse_options: %s quota file already specified.",
997 if (strchr(arg, '/')) {
999 "reiserfs_parse_options: quotafile must be on filesystem root.");
1002 REISERFS_SB(s)->s_qf_names[qtype] =
1003 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1004 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1006 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1009 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1010 *mount_options |= 1 << REISERFS_QUOTA;
1012 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1013 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1017 if (!strcmp(arg, "vfsold"))
1018 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1019 else if (!strcmp(arg, "vfsv0"))
1020 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1023 "reiserfs_parse_options: unknown quota format specified.");
1028 if (c == 'u' || c == 'g' || c == 'f') {
1030 "reiserfs_parse_options: journalled quota options not supported.");
1037 if (!REISERFS_SB(s)->s_jquota_fmt
1038 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1039 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1041 "reiserfs_parse_options: journalled quota format not specified.");
1044 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1045 if (!(*mount_options & (1 << REISERFS_QUOTA))
1046 && sb_any_quota_enabled(s)) {
1048 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1056 static void switch_data_mode(struct super_block *s, unsigned long mode)
1058 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1059 (1 << REISERFS_DATA_ORDERED) |
1060 (1 << REISERFS_DATA_WRITEBACK));
1061 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1064 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1066 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1067 if (!reiserfs_data_log(s)) {
1068 switch_data_mode(s, REISERFS_DATA_LOG);
1069 reiserfs_info(s, "switching to journaled data mode\n");
1071 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1072 if (!reiserfs_data_ordered(s)) {
1073 switch_data_mode(s, REISERFS_DATA_ORDERED);
1074 reiserfs_info(s, "switching to ordered data mode\n");
1076 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1077 if (!reiserfs_data_writeback(s)) {
1078 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1079 reiserfs_info(s, "switching to writeback data mode\n");
1084 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1086 int flush = (1 << REISERFS_BARRIER_FLUSH);
1087 int none = (1 << REISERFS_BARRIER_NONE);
1088 int all_barrier = flush | none;
1090 if (bits & all_barrier) {
1091 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1093 REISERFS_SB(s)->s_mount_opt |= flush;
1094 printk("reiserfs: enabling write barrier flush mode\n");
1095 } else if (bits & none) {
1096 REISERFS_SB(s)->s_mount_opt |= none;
1097 printk("reiserfs: write barriers turned off\n");
1102 static void handle_attrs(struct super_block *s)
1104 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1106 if (reiserfs_attrs(s)) {
1107 if (old_format_only(s)) {
1109 "reiserfs: cannot support attributes on 3.5.x disk format");
1110 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1113 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1115 "reiserfs: cannot support attributes until flag is set in super-block");
1116 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1121 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1123 struct reiserfs_super_block *rs;
1124 struct reiserfs_transaction_handle th;
1125 unsigned long blocks;
1126 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1127 unsigned long safe_mask = 0;
1128 unsigned int commit_max_age = (unsigned int)-1;
1129 struct reiserfs_journal *journal = SB_JOURNAL(s);
1135 rs = SB_DISK_SUPER_BLOCK(s);
1137 if (!reiserfs_parse_options
1138 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1140 for (i = 0; i < MAXQUOTAS; i++) {
1141 kfree(REISERFS_SB(s)->s_qf_names[i]);
1142 REISERFS_SB(s)->s_qf_names[i] = NULL;
1150 /* Add options that are safe here */
1151 safe_mask |= 1 << REISERFS_SMALLTAIL;
1152 safe_mask |= 1 << REISERFS_LARGETAIL;
1153 safe_mask |= 1 << REISERFS_NO_BORDER;
1154 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1155 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1156 safe_mask |= 1 << REISERFS_TEST4;
1157 safe_mask |= 1 << REISERFS_ATTRS;
1158 safe_mask |= 1 << REISERFS_XATTRS_USER;
1159 safe_mask |= 1 << REISERFS_POSIXACL;
1160 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1161 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1162 safe_mask |= 1 << REISERFS_ERROR_RO;
1163 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1164 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1165 safe_mask |= 1 << REISERFS_QUOTA;
1167 /* Update the bitmask, taking care to keep
1168 * the bits we're not allowed to change here */
1169 REISERFS_SB(s)->s_mount_opt =
1171 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1173 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1174 journal->j_max_commit_age = commit_max_age;
1175 journal->j_max_trans_age = commit_max_age;
1176 } else if (commit_max_age == 0) {
1177 /* 0 means restore defaults. */
1178 journal->j_max_commit_age = journal->j_default_max_commit_age;
1179 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1183 int rc = reiserfs_resize(s, blocks);
1188 if (*mount_flags & MS_RDONLY) {
1189 reiserfs_xattr_init(s, *mount_flags);
1190 /* remount read-only */
1191 if (s->s_flags & MS_RDONLY)
1192 /* it is read-only already */
1194 /* try to remount file system with read-only permissions */
1195 if (sb_umount_state(rs) == REISERFS_VALID_FS
1196 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1200 err = journal_begin(&th, s, 10);
1204 /* Mounting a rw partition read-only. */
1205 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1206 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1207 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1209 /* remount read-write */
1210 if (!(s->s_flags & MS_RDONLY)) {
1211 reiserfs_xattr_init(s, *mount_flags);
1212 return 0; /* We are read-write already */
1215 if (reiserfs_is_journal_aborted(journal))
1216 return journal->j_errno;
1218 handle_data_mode(s, mount_options);
1219 handle_barrier_mode(s, mount_options);
1220 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1221 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1222 err = journal_begin(&th, s, 10);
1226 /* Mount a partition which is read-only, read-write */
1227 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1228 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1229 s->s_flags &= ~MS_RDONLY;
1230 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1231 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1232 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1233 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1235 /* this will force a full flush of all journal lists */
1236 SB_JOURNAL(s)->j_must_wait = 1;
1237 err = journal_end(&th, s, 10);
1242 if (!(*mount_flags & MS_RDONLY)) {
1243 finish_unfinished(s);
1244 reiserfs_xattr_init(s, *mount_flags);
1250 static int read_super_block(struct super_block *s, int offset)
1252 struct buffer_head *bh;
1253 struct reiserfs_super_block *rs;
1256 bh = sb_bread(s, offset / s->s_blocksize);
1258 reiserfs_warning(s, "sh-2006: read_super_block: "
1259 "bread failed (dev %s, block %lu, size %lu)",
1260 reiserfs_bdevname(s), offset / s->s_blocksize,
1265 rs = (struct reiserfs_super_block *)bh->b_data;
1266 if (!is_any_reiserfs_magic_string(rs)) {
1271 // ok, reiserfs signature (old or new) found in at the given offset
1273 fs_blocksize = sb_blocksize(rs);
1275 sb_set_blocksize(s, fs_blocksize);
1277 bh = sb_bread(s, offset / s->s_blocksize);
1279 reiserfs_warning(s, "sh-2007: read_super_block: "
1280 "bread failed (dev %s, block %lu, size %lu)\n",
1281 reiserfs_bdevname(s), offset / s->s_blocksize,
1286 rs = (struct reiserfs_super_block *)bh->b_data;
1287 if (sb_blocksize(rs) != s->s_blocksize) {
1288 reiserfs_warning(s, "sh-2011: read_super_block: "
1289 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1290 reiserfs_bdevname(s),
1291 (unsigned long long)bh->b_blocknr,
1297 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1300 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1301 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1302 "get newer reiserfsprogs package");
1306 SB_BUFFER_WITH_SB(s) = bh;
1307 SB_DISK_SUPER_BLOCK(s) = rs;
1309 if (is_reiserfs_jr(rs)) {
1310 /* magic is of non-standard journal filesystem, look at s_version to
1311 find which format is in use */
1312 if (sb_version(rs) == REISERFS_VERSION_2)
1314 "read_super_block: found reiserfs format \"3.6\""
1315 " with non-standard journal");
1316 else if (sb_version(rs) == REISERFS_VERSION_1)
1318 "read_super_block: found reiserfs format \"3.5\""
1319 " with non-standard journal");
1322 "sh-2012: read_super_block: found unknown "
1323 "format \"%u\" of reiserfs with non-standard magic",
1328 /* s_version of standard format may contain incorrect information,
1329 so we just look at the magic string */
1331 "found reiserfs format \"%s\" with standard journal\n",
1332 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1334 s->s_op = &reiserfs_sops;
1335 s->s_export_op = &reiserfs_export_ops;
1337 s->s_qcop = &reiserfs_qctl_operations;
1338 s->dq_op = &reiserfs_quota_operations;
1341 /* new format is limited by the 32 bit wide i_blocks field, want to
1342 ** be one full block below that.
1344 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1348 /* after journal replay, reread all bitmap and super blocks */
1349 static int reread_meta_blocks(struct super_block *s)
1351 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1352 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1353 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1355 "reread_meta_blocks, error reading the super");
1362 /////////////////////////////////////////////////////
1363 // hash detection stuff
1365 // if root directory is empty - we set default - Yura's - hash and
1367 // FIXME: we look for only one name in a directory. If tea and yura
1368 // bith have the same value - we ask user to send report to the
1370 static __u32 find_hash_out(struct super_block *s)
1373 struct inode *inode;
1375 INITIALIZE_PATH(path);
1376 struct reiserfs_dir_entry de;
1377 __u32 hash = DEFAULT_HASH;
1379 inode = s->s_root->d_inode;
1381 do { // Some serious "goto"-hater was there ;)
1382 u32 teahash, r5hash, yurahash;
1384 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1385 retval = search_by_entry_key(s, &key, &path, &de);
1386 if (retval == IO_ERROR) {
1390 if (retval == NAME_NOT_FOUND)
1392 set_de_name_and_namelen(&de);
1393 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1394 /* allow override in this case */
1395 if (reiserfs_rupasov_hash(s)) {
1398 reiserfs_warning(s, "FS seems to be empty, autodetect "
1399 "is using the default hash");
1402 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1403 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1404 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1405 if (((teahash == r5hash)
1407 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1408 == r5hash)) || ((teahash == yurahash)
1410 GET_HASH_VALUE(deh_offset
1415 || ((r5hash == yurahash)
1417 GET_HASH_VALUE(deh_offset
1418 (&(de.de_deh[de.de_entry_num])))))) {
1420 "Unable to automatically detect hash function. "
1421 "Please mount with -o hash={tea,rupasov,r5}",
1422 reiserfs_bdevname(s));
1426 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1429 else if (GET_HASH_VALUE
1430 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1432 else if (GET_HASH_VALUE
1433 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1436 reiserfs_warning(s, "Unrecognised hash function");
1445 // finds out which hash names are sorted with
1446 static int what_hash(struct super_block *s)
1450 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1452 /* reiserfs_hash_detect() == true if any of the hash mount options
1453 ** were used. We must check them to make sure the user isn't
1454 ** using a bad hash value
1456 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1457 code = find_hash_out(s);
1459 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1460 /* detection has found the hash, and we must check against the
1463 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1464 reiserfs_warning(s, "Error, %s hash detected, "
1465 "unable to force rupasov hash",
1466 reiserfs_hashname(code));
1468 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1469 reiserfs_warning(s, "Error, %s hash detected, "
1470 "unable to force tea hash",
1471 reiserfs_hashname(code));
1473 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1474 reiserfs_warning(s, "Error, %s hash detected, "
1475 "unable to force r5 hash",
1476 reiserfs_hashname(code));
1480 /* find_hash_out was not called or could not determine the hash */
1481 if (reiserfs_rupasov_hash(s)) {
1483 } else if (reiserfs_tea_hash(s)) {
1485 } else if (reiserfs_r5_hash(s)) {
1490 /* if we are mounted RW, and we have a new valid hash code, update
1493 if (code != UNSET_HASH &&
1494 !(s->s_flags & MS_RDONLY) &&
1495 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1496 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1501 // return pointer to appropriate function
1502 static hashf_t hash_function(struct super_block *s)
1504 switch (what_hash(s)) {
1506 reiserfs_info(s, "Using tea hash to sort names\n");
1509 reiserfs_info(s, "Using rupasov hash to sort names\n");
1512 reiserfs_info(s, "Using r5 hash to sort names\n");
1518 // this is used to set up correct value for old partitions
1519 static int function2code(hashf_t func)
1521 if (func == keyed_hash)
1523 if (func == yura_hash)
1525 if (func == r5_hash)
1528 BUG(); // should never happen
1533 #define SWARN(silent, s, ...) \
1535 reiserfs_warning (s, __VA_ARGS__)
1537 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1539 struct inode *root_inode;
1540 struct reiserfs_transaction_handle th;
1542 unsigned long blocks;
1543 unsigned int commit_max_age = 0;
1545 struct reiserfs_iget_args args;
1546 struct reiserfs_super_block *rs;
1548 struct reiserfs_sb_info *sbi;
1549 int errval = -EINVAL;
1551 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1557 /* Set default values for options: non-aggressive tails, RO on errors */
1558 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1559 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1560 /* no preallocation minimum, be smart in
1561 reiserfs_file_write instead */
1562 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1563 /* Preallocate by 16 blocks (17-1) at once */
1564 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1565 #ifdef CONFIG_REISERFS_FS_XATTR
1566 /* Initialize the rwsem for xattr dir */
1567 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1569 /* setup default block allocator options */
1570 reiserfs_init_alloc_options(s);
1573 if (reiserfs_parse_options
1574 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1575 &commit_max_age) == 0) {
1580 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1581 "for remount only");
1585 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1586 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1588 /* try new format (64-th 1k block), which can contain reiserfs super block */
1589 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1591 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1592 reiserfs_bdevname(s));
1596 rs = SB_DISK_SUPER_BLOCK(s);
1597 /* Let's do basic sanity check to verify that underlying device is not
1598 smaller than the filesystem. If the check fails then abort and scream,
1599 because bad stuff will happen otherwise. */
1600 if (s->s_bdev && s->s_bdev->bd_inode
1601 && i_size_read(s->s_bdev->bd_inode) <
1602 sb_block_count(rs) * sb_blocksize(rs)) {
1604 "Filesystem on %s cannot be mounted because it is bigger than the device",
1605 reiserfs_bdevname(s));
1607 "You may need to run fsck or increase size of your LVM partition");
1609 "Or may be you forgot to reboot after fdisk when it told you to");
1613 sbi->s_mount_state = SB_REISERFS_STATE(s);
1614 sbi->s_mount_state = REISERFS_VALID_FS;
1616 if ((errval = reiserfs_init_bitmap_cache(s))) {
1618 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1622 #ifdef CONFIG_REISERFS_CHECK
1623 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1624 SWARN(silent, s, "- it is slow mode for debugging.");
1627 /* make data=ordered the default */
1628 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1629 !reiserfs_data_writeback(s)) {
1630 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1633 if (reiserfs_data_log(s)) {
1634 reiserfs_info(s, "using journaled data mode\n");
1635 } else if (reiserfs_data_ordered(s)) {
1636 reiserfs_info(s, "using ordered data mode\n");
1638 reiserfs_info(s, "using writeback data mode\n");
1640 if (reiserfs_barrier_flush(s)) {
1641 printk("reiserfs: using flush barriers\n");
1643 // set_device_ro(s->s_dev, 1) ;
1644 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1646 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1649 jinit_done = 1; /* once this is set, journal_release must be called
1650 ** if we error out of the mount
1653 if (reread_meta_blocks(s)) {
1655 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1662 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1664 "clm-7000: Detected readonly device, marking FS readonly");
1665 s->s_flags |= MS_RDONLY;
1667 args.objectid = REISERFS_ROOT_OBJECTID;
1668 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1670 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1671 reiserfs_init_locked_inode, (void *)(&args));
1674 "jmacd-10: reiserfs_fill_super: get root inode failed");
1678 if (root_inode->i_state & I_NEW) {
1679 reiserfs_read_locked_inode(root_inode, &args);
1680 unlock_new_inode(root_inode);
1683 s->s_root = d_alloc_root(root_inode);
1688 // define and initialize hash function
1689 sbi->s_hash_function = hash_function(s);
1690 if (sbi->s_hash_function == NULL) {
1696 if (is_reiserfs_3_5(rs)
1697 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1698 set_bit(REISERFS_3_5, &(sbi->s_properties));
1699 else if (old_format)
1700 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1702 set_bit(REISERFS_3_6, &(sbi->s_properties));
1704 if (!(s->s_flags & MS_RDONLY)) {
1706 errval = journal_begin(&th, s, 1);
1712 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1714 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1715 set_sb_fs_state(rs, 0);
1717 if (old_format_only(s)) {
1718 /* filesystem of format 3.5 either with standard or non-standard
1720 if (convert_reiserfs(s)) {
1721 /* and -o conv is given */
1724 "converting 3.5 filesystem to the 3.6 format");
1726 if (is_reiserfs_3_5(rs))
1727 /* put magic string of 3.6 format. 2.2 will not be able to
1728 mount this filesystem anymore */
1729 memcpy(rs->s_v1.s_magic,
1730 reiserfs_3_6_magic_string,
1732 (reiserfs_3_6_magic_string));
1734 set_sb_version(rs, REISERFS_VERSION_2);
1735 reiserfs_convert_objectid_map_v1(s);
1736 set_bit(REISERFS_3_6, &(sbi->s_properties));
1737 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1738 } else if (!silent) {
1739 reiserfs_info(s, "using 3.5.x disk format\n");
1743 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1744 errval = journal_end(&th, s, 1);
1751 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1757 /* look for files which were to be removed in previous session */
1758 finish_unfinished(s);
1760 if (old_format_only(s) && !silent) {
1761 reiserfs_info(s, "using 3.5.x disk format\n");
1764 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1770 // mark hash in super block: it could be unset. overwrite should be ok
1771 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1775 reiserfs_proc_info_init(s);
1777 init_waitqueue_head(&(sbi->s_wait));
1778 spin_lock_init(&sbi->bitmap_lock);
1783 if (jinit_done) { /* kill the commit thread, free journal ram */
1784 journal_release_error(NULL, s);
1787 reiserfs_free_bitmap_cache(s);
1788 if (SB_BUFFER_WITH_SB(s))
1789 brelse(SB_BUFFER_WITH_SB(s));
1793 for (j = 0; j < MAXQUOTAS; j++) {
1794 kfree(sbi->s_qf_names[j]);
1795 sbi->s_qf_names[j] = NULL;
1801 s->s_fs_info = NULL;
1805 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1807 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1809 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1810 buf->f_bfree = sb_free_blocks(rs);
1811 buf->f_bavail = buf->f_bfree;
1812 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1813 buf->f_bsize = dentry->d_sb->s_blocksize;
1814 /* changed to accommodate gcc folks. */
1815 buf->f_type = REISERFS_SUPER_MAGIC;
1820 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1822 struct reiserfs_transaction_handle th;
1825 /* We may create quota structure so we need to reserve enough blocks */
1826 reiserfs_write_lock(inode->i_sb);
1828 journal_begin(&th, inode->i_sb,
1829 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1832 ret = dquot_initialize(inode, type);
1834 journal_end(&th, inode->i_sb,
1835 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1839 reiserfs_write_unlock(inode->i_sb);
1843 static int reiserfs_dquot_drop(struct inode *inode)
1845 struct reiserfs_transaction_handle th;
1848 /* We may delete quota structure so we need to reserve enough blocks */
1849 reiserfs_write_lock(inode->i_sb);
1851 journal_begin(&th, inode->i_sb,
1852 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1855 ret = dquot_drop(inode);
1857 journal_end(&th, inode->i_sb,
1858 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1862 reiserfs_write_unlock(inode->i_sb);
1866 static int reiserfs_write_dquot(struct dquot *dquot)
1868 struct reiserfs_transaction_handle th;
1871 reiserfs_write_lock(dquot->dq_sb);
1873 journal_begin(&th, dquot->dq_sb,
1874 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1877 ret = dquot_commit(dquot);
1879 journal_end(&th, dquot->dq_sb,
1880 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1884 reiserfs_write_unlock(dquot->dq_sb);
1888 static int reiserfs_acquire_dquot(struct dquot *dquot)
1890 struct reiserfs_transaction_handle th;
1893 reiserfs_write_lock(dquot->dq_sb);
1895 journal_begin(&th, dquot->dq_sb,
1896 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1899 ret = dquot_acquire(dquot);
1901 journal_end(&th, dquot->dq_sb,
1902 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1906 reiserfs_write_unlock(dquot->dq_sb);
1910 static int reiserfs_release_dquot(struct dquot *dquot)
1912 struct reiserfs_transaction_handle th;
1915 reiserfs_write_lock(dquot->dq_sb);
1917 journal_begin(&th, dquot->dq_sb,
1918 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1921 ret = dquot_release(dquot);
1923 journal_end(&th, dquot->dq_sb,
1924 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1928 reiserfs_write_unlock(dquot->dq_sb);
1932 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1934 /* Are we journalling quotas? */
1935 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1936 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1937 dquot_mark_dquot_dirty(dquot);
1938 return reiserfs_write_dquot(dquot);
1940 return dquot_mark_dquot_dirty(dquot);
1943 static int reiserfs_write_info(struct super_block *sb, int type)
1945 struct reiserfs_transaction_handle th;
1948 /* Data block + inode block */
1949 reiserfs_write_lock(sb);
1950 ret = journal_begin(&th, sb, 2);
1953 ret = dquot_commit_info(sb, type);
1954 err = journal_end(&th, sb, 2);
1958 reiserfs_write_unlock(sb);
1963 * Turn on quotas during mount time - we need to find the quota file and such...
1965 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1967 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
1968 REISERFS_SB(sb)->s_jquota_fmt, type);
1972 * Standard function to be called on quota_on
1974 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
1978 struct nameidata nd;
1980 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
1982 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
1985 /* Quotafile not on the same filesystem? */
1986 if (nd.mnt->mnt_sb != sb) {
1990 /* We must not pack tails for quota files on reiserfs for quota IO to work */
1991 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
1992 reiserfs_warning(sb,
1993 "reiserfs: Quota file must have tail packing disabled.");
1997 /* Not journalling quota? No more tests needed... */
1998 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
1999 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2001 return vfs_quota_on(sb, type, format_id, path);
2003 /* Quotafile not of fs root? */
2004 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2005 reiserfs_warning(sb,
2006 "reiserfs: Quota file not on filesystem root. "
2007 "Journalled quota will not work.");
2009 return vfs_quota_on(sb, type, format_id, path);
2012 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2013 * acquiring the locks... As quota files are never truncated and quota code
2014 * itself serializes the operations (and noone else should touch the files)
2015 * we don't have to be afraid of races */
2016 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2017 size_t len, loff_t off)
2019 struct inode *inode = sb_dqopt(sb)->files[type];
2020 unsigned long blk = off >> sb->s_blocksize_bits;
2021 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2023 struct buffer_head tmp_bh, *bh;
2024 loff_t i_size = i_size_read(inode);
2028 if (off + len > i_size)
2031 while (toread > 0) {
2033 sb->s_blocksize - offset <
2034 toread ? sb->s_blocksize - offset : toread;
2036 /* Quota files are without tails so we can safely use this function */
2037 reiserfs_write_lock(sb);
2038 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2039 reiserfs_write_unlock(sb);
2042 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2043 memset(data, 0, tocopy);
2045 bh = sb_bread(sb, tmp_bh.b_blocknr);
2048 memcpy(data, bh->b_data + offset, tocopy);
2059 /* Write to quotafile (we know the transaction is already started and has
2060 * enough credits) */
2061 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2062 const char *data, size_t len, loff_t off)
2064 struct inode *inode = sb_dqopt(sb)->files[type];
2065 unsigned long blk = off >> sb->s_blocksize_bits;
2066 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2067 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2068 size_t towrite = len;
2069 struct buffer_head tmp_bh, *bh;
2071 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2072 while (towrite > 0) {
2073 tocopy = sb->s_blocksize - offset < towrite ?
2074 sb->s_blocksize - offset : towrite;
2076 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2079 if (offset || tocopy != sb->s_blocksize)
2080 bh = sb_bread(sb, tmp_bh.b_blocknr);
2082 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2088 memcpy(bh->b_data + offset, data, tocopy);
2089 flush_dcache_page(bh->b_page);
2090 set_buffer_uptodate(bh);
2092 reiserfs_prepare_for_journal(sb, bh, 1);
2093 journal_mark_dirty(current->journal_info, sb, bh);
2095 reiserfs_add_ordered_list(inode, bh);
2105 if (inode->i_size < off + len - towrite)
2106 i_size_write(inode, off + len - towrite);
2108 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2109 mark_inode_dirty(inode);
2110 mutex_unlock(&inode->i_mutex);
2111 return len - towrite;
2116 static int get_super_block(struct file_system_type *fs_type,
2117 int flags, const char *dev_name,
2118 void *data, struct vfsmount *mnt)
2120 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2124 static int __init init_reiserfs_fs(void)
2128 if ((ret = init_inodecache())) {
2132 if ((ret = reiserfs_xattr_register_handlers()))
2133 goto failed_reiserfs_xattr_register_handlers;
2135 reiserfs_proc_info_global_init();
2136 reiserfs_proc_register_global("version",
2137 reiserfs_global_version_in_proc);
2139 ret = register_filesystem(&reiserfs_fs_type);
2145 reiserfs_xattr_unregister_handlers();
2147 failed_reiserfs_xattr_register_handlers:
2148 reiserfs_proc_unregister_global("version");
2149 reiserfs_proc_info_global_done();
2150 destroy_inodecache();
2155 static void __exit exit_reiserfs_fs(void)
2157 reiserfs_xattr_unregister_handlers();
2158 reiserfs_proc_unregister_global("version");
2159 reiserfs_proc_info_global_done();
2160 unregister_filesystem(&reiserfs_fs_type);
2161 destroy_inodecache();
2164 struct file_system_type reiserfs_fs_type = {
2165 .owner = THIS_MODULE,
2167 .get_sb = get_super_block,
2168 .kill_sb = reiserfs_kill_sb,
2169 .fs_flags = FS_REQUIRES_DEV,
2172 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2173 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2174 MODULE_LICENSE("GPL");
2176 module_init(init_reiserfs_fs);
2177 module_exit(exit_reiserfs_fs);