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/mnt_namespace.h>
27 #include <linux/mount.h>
28 #include <linux/namei.h>
29 #include <linux/quotaops.h>
31 struct file_system_type reiserfs_fs_type;
33 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
34 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
35 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
37 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
39 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
40 strlen(reiserfs_3_5_magic_string));
43 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
45 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
46 strlen(reiserfs_3_6_magic_string));
49 int is_reiserfs_jr(struct reiserfs_super_block *rs)
51 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
52 strlen(reiserfs_jr_magic_string));
55 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
57 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
61 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
62 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
64 static int reiserfs_sync_fs(struct super_block *s, int wait)
66 if (!(s->s_flags & MS_RDONLY)) {
67 struct reiserfs_transaction_handle th;
68 reiserfs_write_lock(s);
69 if (!journal_begin(&th, s, 1))
70 if (!journal_end_sync(&th, s, 1))
71 reiserfs_flush_old_commits(s);
72 s->s_dirt = 0; /* Even if it's not true.
73 * We'll loop forever in sync_supers otherwise */
74 reiserfs_write_unlock(s);
81 static void reiserfs_write_super(struct super_block *s)
83 reiserfs_sync_fs(s, 1);
86 static void reiserfs_write_super_lockfs(struct super_block *s)
88 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
93 reiserfs_block_writes(&th);
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
103 reiserfs_write_unlock(s);
106 static void reiserfs_unlockfs(struct super_block *s)
108 reiserfs_allow_writes(s);
111 extern const struct in_core_key MAX_IN_CORE_KEY;
113 /* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
120 static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
123 struct reiserfs_transaction_handle th;
126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
131 reiserfs_delete_solid_item(&th, NULL, key);
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
140 static int reiserfs_quota_on_mount(struct super_block *, int);
143 /* look for uncompleted unlinks and truncates and complete them */
144 static int finish_unfinished(struct super_block *s)
146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
148 struct reiserfs_key save_link_key;
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_kill_sb(struct super_block *s)
435 if (REISERFS_SB(s)) {
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_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
515 SLAB_CTOR_CONSTRUCTOR) {
516 INIT_LIST_HEAD(&ei->i_prealloc_list);
517 inode_init_once(&ei->vfs_inode);
518 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
519 ei->i_acl_access = NULL;
520 ei->i_acl_default = NULL;
525 static int init_inodecache(void)
527 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
529 reiserfs_inode_info),
530 0, (SLAB_RECLAIM_ACCOUNT|
533 if (reiserfs_inode_cachep == NULL)
538 static void destroy_inodecache(void)
540 kmem_cache_destroy(reiserfs_inode_cachep);
543 /* we don't mark inodes dirty, we just log them */
544 static void reiserfs_dirty_inode(struct inode *inode)
546 struct reiserfs_transaction_handle th;
549 if (inode->i_sb->s_flags & MS_RDONLY) {
550 reiserfs_warning(inode->i_sb,
551 "clm-6006: writing inode %lu on readonly FS",
555 reiserfs_write_lock(inode->i_sb);
557 /* this is really only used for atime updates, so they don't have
558 ** to be included in O_SYNC or fsync
560 err = journal_begin(&th, inode->i_sb, 1);
562 reiserfs_write_unlock(inode->i_sb);
565 reiserfs_update_sd(&th, inode);
566 journal_end(&th, inode->i_sb, 1);
567 reiserfs_write_unlock(inode->i_sb);
570 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
571 static void reiserfs_clear_inode(struct inode *inode)
573 struct posix_acl *acl;
575 acl = REISERFS_I(inode)->i_acl_access;
576 if (acl && !IS_ERR(acl))
577 posix_acl_release(acl);
578 REISERFS_I(inode)->i_acl_access = NULL;
580 acl = REISERFS_I(inode)->i_acl_default;
581 if (acl && !IS_ERR(acl))
582 posix_acl_release(acl);
583 REISERFS_I(inode)->i_acl_default = NULL;
586 #define reiserfs_clear_inode NULL
590 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
592 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
596 static struct super_operations reiserfs_sops = {
597 .alloc_inode = reiserfs_alloc_inode,
598 .destroy_inode = reiserfs_destroy_inode,
599 .write_inode = reiserfs_write_inode,
600 .dirty_inode = reiserfs_dirty_inode,
601 .delete_inode = reiserfs_delete_inode,
602 .clear_inode = reiserfs_clear_inode,
603 .put_super = reiserfs_put_super,
604 .write_super = reiserfs_write_super,
605 .sync_fs = reiserfs_sync_fs,
606 .write_super_lockfs = reiserfs_write_super_lockfs,
607 .unlockfs = reiserfs_unlockfs,
608 .statfs = reiserfs_statfs,
609 .remount_fs = reiserfs_remount,
611 .quota_read = reiserfs_quota_read,
612 .quota_write = reiserfs_quota_write,
617 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
619 static int reiserfs_dquot_initialize(struct inode *, int);
620 static int reiserfs_dquot_drop(struct inode *);
621 static int reiserfs_write_dquot(struct dquot *);
622 static int reiserfs_acquire_dquot(struct dquot *);
623 static int reiserfs_release_dquot(struct dquot *);
624 static int reiserfs_mark_dquot_dirty(struct dquot *);
625 static int reiserfs_write_info(struct super_block *, int);
626 static int reiserfs_quota_on(struct super_block *, int, int, char *);
628 static struct dquot_operations reiserfs_quota_operations = {
629 .initialize = reiserfs_dquot_initialize,
630 .drop = reiserfs_dquot_drop,
631 .alloc_space = dquot_alloc_space,
632 .alloc_inode = dquot_alloc_inode,
633 .free_space = dquot_free_space,
634 .free_inode = dquot_free_inode,
635 .transfer = dquot_transfer,
636 .write_dquot = reiserfs_write_dquot,
637 .acquire_dquot = reiserfs_acquire_dquot,
638 .release_dquot = reiserfs_release_dquot,
639 .mark_dirty = reiserfs_mark_dquot_dirty,
640 .write_info = reiserfs_write_info,
643 static struct quotactl_ops reiserfs_qctl_operations = {
644 .quota_on = reiserfs_quota_on,
645 .quota_off = vfs_quota_off,
646 .quota_sync = vfs_quota_sync,
647 .get_info = vfs_get_dqinfo,
648 .set_info = vfs_set_dqinfo,
649 .get_dqblk = vfs_get_dqblk,
650 .set_dqblk = vfs_set_dqblk,
654 static struct export_operations reiserfs_export_ops = {
655 .encode_fh = reiserfs_encode_fh,
656 .decode_fh = reiserfs_decode_fh,
657 .get_parent = reiserfs_get_parent,
658 .get_dentry = reiserfs_get_dentry,
661 /* this struct is used in reiserfs_getopt () for containing the value for those
662 mount options that have values rather than being toggles. */
665 int setmask; /* bitmask which is to set on mount_options bitmask when this
666 value is found, 0 is no bits are to be changed. */
667 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
668 value is found, 0 is no bits are to be changed. This is
669 applied BEFORE setmask */
672 /* Set this bit in arg_required to allow empty arguments */
673 #define REISERFS_OPT_ALLOWEMPTY 31
675 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
679 int arg_required; /* 0 if argument is not required, not 0 otherwise */
680 const arg_desc_t *values; /* list of values accepted by an option */
681 int setmask; /* bitmask which is to set on mount_options bitmask when this
682 value is found, 0 is no bits are to be changed. */
683 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
684 value is found, 0 is no bits are to be changed. This is
685 applied BEFORE setmask */
688 /* possible values for -o data= */
689 static const arg_desc_t logging_mode[] = {
690 {"ordered", 1 << REISERFS_DATA_ORDERED,
691 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
692 {"journal", 1 << REISERFS_DATA_LOG,
693 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
694 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
695 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
699 /* possible values for -o barrier= */
700 static const arg_desc_t barrier_mode[] = {
701 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
702 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
706 /* possible values for "-o block-allocator=" and bits which are to be set in
707 s_mount_opt of reiserfs specific part of in-core super block */
708 static const arg_desc_t balloc[] = {
709 {"noborder", 1 << REISERFS_NO_BORDER, 0},
710 {"border", 0, 1 << REISERFS_NO_BORDER},
711 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
712 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
713 {"test4", 1 << REISERFS_TEST4, 0},
714 {"notest4", 0, 1 << REISERFS_TEST4},
718 static const arg_desc_t tails[] = {
719 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
720 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
721 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
725 static const arg_desc_t error_actions[] = {
726 {"panic", 1 << REISERFS_ERROR_PANIC,
727 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
728 {"ro-remount", 1 << REISERFS_ERROR_RO,
729 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
730 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
731 {"continue", 1 << REISERFS_ERROR_CONTINUE,
732 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
737 /* proceed only one option from a list *cur - string containing of mount options
738 opts - array of options which are accepted
739 opt_arg - if option is found and requires an argument and if it is specifed
740 in the input - pointer to the argument is stored here
741 bit_flags - if option requires to set a certain bit - it is set here
742 return -1 if unknown option is found, opt->arg_required otherwise */
743 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
744 char **opt_arg, unsigned long *bit_flags)
753 const opt_desc_t *opt;
754 const arg_desc_t *arg;
758 /* assume argument cannot contain commas */
759 *cur = strchr(p, ',');
765 if (!strncmp(p, "alloc=", 6)) {
766 /* Ugly special case, probably we should redo options parser so that
767 it can understand several arguments for some options, also so that
768 it can fill several bitfields with option values. */
769 if (reiserfs_parse_alloc_options(s, p + 6)) {
776 /* for every option in the list */
777 for (opt = opts; opt->option_name; opt++) {
778 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
781 (1 << REISERFS_UNSUPPORTED_OPT))
782 reiserfs_warning(s, "%s not supported.",
785 *bit_flags &= ~opt->clrmask;
787 (1 << REISERFS_UNSUPPORTED_OPT))
788 reiserfs_warning(s, "%s not supported.",
791 *bit_flags |= opt->setmask;
796 if (!opt->option_name) {
797 reiserfs_warning(s, "unknown mount option \"%s\"", p);
801 p += strlen(opt->option_name);
804 if (!opt->arg_required) {
806 "the option \"%s\" does not require an argument",
813 if (opt->arg_required) {
815 "the option \"%s\" requires an argument",
821 reiserfs_warning(s, "head of option \"%s\" is only correct",
826 /* move to the argument, or to next option if argument is not required */
829 if (opt->arg_required
830 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
832 /* this catches "option=," if not allowed */
833 reiserfs_warning(s, "empty argument for \"%s\"",
839 /* *=NULLopt_arg contains pointer to argument */
841 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
844 /* values possible for this option are listed in opt->values */
845 for (arg = opt->values; arg->value; arg++) {
846 if (!strcmp(p, arg->value)) {
848 *bit_flags &= ~arg->clrmask;
849 *bit_flags |= arg->setmask;
851 return opt->arg_required;
855 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
860 /* returns 0 if something is wrong in option string, 1 - otherwise */
861 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
862 unsigned long *mount_options,
863 /* after the parsing phase, contains the
864 collection of bitflags defining what
865 mount options were selected. */
866 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
868 unsigned int *commit_max_age)
873 opt_desc_t opts[] = {
874 /* Compatibility stuff, so that -o notail for old setups still work */
875 {"tails",.arg_required = 't',.values = tails},
877 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
878 {"conv",.setmask = 1 << REISERFS_CONVERT},
879 {"attrs",.setmask = 1 << REISERFS_ATTRS},
880 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
881 #ifdef CONFIG_REISERFS_FS_XATTR
882 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
883 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
885 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
886 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
888 #ifndef CONFIG_TAGGING_NONE
889 {"tagxid",.setmask = 1 << REISERFS_TAGGED},
890 {"tag",.setmask = 1 << REISERFS_TAGGED},
891 {"notag",.clrmask = 1 << REISERFS_TAGGED},
893 #ifdef CONFIG_PROPAGATE
894 {"tag",.arg_required = 'T',.values = NULL},
896 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
897 {"acl",.setmask = 1 << REISERFS_POSIXACL},
898 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
900 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
901 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
903 {.option_name = "nolog"},
904 {"replayonly",.setmask = 1 << REPLAYONLY},
905 {"block-allocator",.arg_required = 'a',.values = balloc},
906 {"data",.arg_required = 'd',.values = logging_mode},
907 {"barrier",.arg_required = 'b',.values = barrier_mode},
908 {"resize",.arg_required = 'r',.values = NULL},
909 {"jdev",.arg_required = 'j',.values = NULL},
910 {"nolargeio",.arg_required = 'w',.values = NULL},
911 {"commit",.arg_required = 'c',.values = NULL},
912 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
913 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
914 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
915 {"errors",.arg_required = 'e',.values = error_actions},
916 {"usrjquota",.arg_required =
917 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
918 {"grpjquota",.arg_required =
919 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
920 {"jqfmt",.arg_required = 'f',.values = NULL},
921 {.option_name = NULL}
925 if (!options || !*options)
926 /* use default configuration: create tails, journaling on, no
927 conversion to newest format */
930 for (pos = options; pos;) {
931 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
933 /* wrong option is given */
940 /* "resize=NNN" or "resize=auto" */
942 if (!strcmp(arg, "auto")) {
943 /* From JFS code, to auto-get the size. */
945 s->s_bdev->bd_inode->i_size >> s->
948 *blocks = simple_strtoul(arg, &p, 0);
950 /* NNN does not look like a number */
952 "reiserfs_parse_options: bad value %s",
961 unsigned long val = simple_strtoul(arg, &p, 0);
962 /* commit=NNN (time in seconds) */
963 if (*p != '\0' || val >= (unsigned int)-1) {
965 "reiserfs_parse_options: bad value %s",
969 *commit_max_age = (unsigned int)val;
973 reiserfs_warning(s, "reiserfs: nolargeio option is no longer supported");
978 if (arg && *arg && jdev_name) {
979 if (*jdev_name) { //Hm, already assigned?
981 "reiserfs_parse_options: journal device was already specified to be %s",
989 if (c == 'u' || c == 'g') {
990 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
992 if (sb_any_quota_enabled(s)) {
994 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
997 if (*arg) { /* Some filename specified? */
998 if (REISERFS_SB(s)->s_qf_names[qtype]
999 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1002 "reiserfs_parse_options: %s quota file already specified.",
1006 if (strchr(arg, '/')) {
1008 "reiserfs_parse_options: quotafile must be on filesystem root.");
1011 REISERFS_SB(s)->s_qf_names[qtype] =
1012 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1013 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1015 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1018 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1019 *mount_options |= 1 << REISERFS_QUOTA;
1021 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1022 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1026 if (!strcmp(arg, "vfsold"))
1027 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1028 else if (!strcmp(arg, "vfsv0"))
1029 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1032 "reiserfs_parse_options: unknown quota format specified.");
1037 if (c == 'u' || c == 'g' || c == 'f') {
1039 "reiserfs_parse_options: journalled quota options not supported.");
1046 if (!REISERFS_SB(s)->s_jquota_fmt
1047 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1048 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1050 "reiserfs_parse_options: journalled quota format not specified.");
1053 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1054 if (!(*mount_options & (1 << REISERFS_QUOTA))
1055 && sb_any_quota_enabled(s)) {
1057 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1065 static void switch_data_mode(struct super_block *s, unsigned long mode)
1067 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1068 (1 << REISERFS_DATA_ORDERED) |
1069 (1 << REISERFS_DATA_WRITEBACK));
1070 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1073 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1075 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1076 if (!reiserfs_data_log(s)) {
1077 switch_data_mode(s, REISERFS_DATA_LOG);
1078 reiserfs_info(s, "switching to journaled data mode\n");
1080 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1081 if (!reiserfs_data_ordered(s)) {
1082 switch_data_mode(s, REISERFS_DATA_ORDERED);
1083 reiserfs_info(s, "switching to ordered data mode\n");
1085 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1086 if (!reiserfs_data_writeback(s)) {
1087 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1088 reiserfs_info(s, "switching to writeback data mode\n");
1093 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1095 int flush = (1 << REISERFS_BARRIER_FLUSH);
1096 int none = (1 << REISERFS_BARRIER_NONE);
1097 int all_barrier = flush | none;
1099 if (bits & all_barrier) {
1100 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1102 REISERFS_SB(s)->s_mount_opt |= flush;
1103 printk("reiserfs: enabling write barrier flush mode\n");
1104 } else if (bits & none) {
1105 REISERFS_SB(s)->s_mount_opt |= none;
1106 printk("reiserfs: write barriers turned off\n");
1111 static void handle_attrs(struct super_block *s)
1113 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1115 if (reiserfs_attrs(s)) {
1116 if (old_format_only(s)) {
1118 "reiserfs: cannot support attributes on 3.5.x disk format");
1119 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1122 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1124 "reiserfs: cannot support attributes until flag is set in super-block");
1125 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1130 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1132 struct reiserfs_super_block *rs;
1133 struct reiserfs_transaction_handle th;
1134 unsigned long blocks;
1135 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1136 unsigned long safe_mask = 0;
1137 unsigned int commit_max_age = (unsigned int)-1;
1138 struct reiserfs_journal *journal = SB_JOURNAL(s);
1144 rs = SB_DISK_SUPER_BLOCK(s);
1146 if (!reiserfs_parse_options
1147 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1149 for (i = 0; i < MAXQUOTAS; i++) {
1150 kfree(REISERFS_SB(s)->s_qf_names[i]);
1151 REISERFS_SB(s)->s_qf_names[i] = NULL;
1157 if ((mount_options & (1 << REISERFS_TAGGED)) &&
1158 !(s->s_flags & MS_TAGGED)) {
1159 reiserfs_warning(s, "reiserfs: tagging not permitted on remount.");
1165 /* Add options that are safe here */
1166 safe_mask |= 1 << REISERFS_SMALLTAIL;
1167 safe_mask |= 1 << REISERFS_LARGETAIL;
1168 safe_mask |= 1 << REISERFS_NO_BORDER;
1169 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1170 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1171 safe_mask |= 1 << REISERFS_TEST4;
1172 safe_mask |= 1 << REISERFS_ATTRS;
1173 safe_mask |= 1 << REISERFS_XATTRS_USER;
1174 safe_mask |= 1 << REISERFS_POSIXACL;
1175 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1176 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1177 safe_mask |= 1 << REISERFS_ERROR_RO;
1178 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1179 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1180 safe_mask |= 1 << REISERFS_QUOTA;
1182 /* Update the bitmask, taking care to keep
1183 * the bits we're not allowed to change here */
1184 REISERFS_SB(s)->s_mount_opt =
1186 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1188 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1189 journal->j_max_commit_age = commit_max_age;
1190 journal->j_max_trans_age = commit_max_age;
1191 } else if (commit_max_age == 0) {
1192 /* 0 means restore defaults. */
1193 journal->j_max_commit_age = journal->j_default_max_commit_age;
1194 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1198 int rc = reiserfs_resize(s, blocks);
1203 if (*mount_flags & MS_RDONLY) {
1204 reiserfs_xattr_init(s, *mount_flags);
1205 /* remount read-only */
1206 if (s->s_flags & MS_RDONLY)
1207 /* it is read-only already */
1209 /* try to remount file system with read-only permissions */
1210 if (sb_umount_state(rs) == REISERFS_VALID_FS
1211 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1215 err = journal_begin(&th, s, 10);
1219 /* Mounting a rw partition read-only. */
1220 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1221 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1222 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1224 /* remount read-write */
1225 if (!(s->s_flags & MS_RDONLY)) {
1226 reiserfs_xattr_init(s, *mount_flags);
1227 return 0; /* We are read-write already */
1230 if (reiserfs_is_journal_aborted(journal))
1231 return journal->j_errno;
1233 handle_data_mode(s, mount_options);
1234 handle_barrier_mode(s, mount_options);
1235 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1236 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1237 err = journal_begin(&th, s, 10);
1241 /* Mount a partition which is read-only, read-write */
1242 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1243 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1244 s->s_flags &= ~MS_RDONLY;
1245 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1246 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1247 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1248 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1250 /* this will force a full flush of all journal lists */
1251 SB_JOURNAL(s)->j_must_wait = 1;
1252 err = journal_end(&th, s, 10);
1257 if (!(*mount_flags & MS_RDONLY)) {
1258 finish_unfinished(s);
1259 reiserfs_xattr_init(s, *mount_flags);
1265 static int read_super_block(struct super_block *s, int offset)
1267 struct buffer_head *bh;
1268 struct reiserfs_super_block *rs;
1271 bh = sb_bread(s, offset / s->s_blocksize);
1273 reiserfs_warning(s, "sh-2006: read_super_block: "
1274 "bread failed (dev %s, block %lu, size %lu)",
1275 reiserfs_bdevname(s), offset / s->s_blocksize,
1280 rs = (struct reiserfs_super_block *)bh->b_data;
1281 if (!is_any_reiserfs_magic_string(rs)) {
1286 // ok, reiserfs signature (old or new) found in at the given offset
1288 fs_blocksize = sb_blocksize(rs);
1290 sb_set_blocksize(s, fs_blocksize);
1292 bh = sb_bread(s, offset / s->s_blocksize);
1294 reiserfs_warning(s, "sh-2007: read_super_block: "
1295 "bread failed (dev %s, block %lu, size %lu)\n",
1296 reiserfs_bdevname(s), offset / s->s_blocksize,
1301 rs = (struct reiserfs_super_block *)bh->b_data;
1302 if (sb_blocksize(rs) != s->s_blocksize) {
1303 reiserfs_warning(s, "sh-2011: read_super_block: "
1304 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1305 reiserfs_bdevname(s),
1306 (unsigned long long)bh->b_blocknr,
1312 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1315 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1316 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1317 "get newer reiserfsprogs package");
1321 SB_BUFFER_WITH_SB(s) = bh;
1322 SB_DISK_SUPER_BLOCK(s) = rs;
1324 if (is_reiserfs_jr(rs)) {
1325 /* magic is of non-standard journal filesystem, look at s_version to
1326 find which format is in use */
1327 if (sb_version(rs) == REISERFS_VERSION_2)
1329 "read_super_block: found reiserfs format \"3.6\""
1330 " with non-standard journal");
1331 else if (sb_version(rs) == REISERFS_VERSION_1)
1333 "read_super_block: found reiserfs format \"3.5\""
1334 " with non-standard journal");
1337 "sh-2012: read_super_block: found unknown "
1338 "format \"%u\" of reiserfs with non-standard magic",
1343 /* s_version of standard format may contain incorrect information,
1344 so we just look at the magic string */
1346 "found reiserfs format \"%s\" with standard journal\n",
1347 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1349 s->s_op = &reiserfs_sops;
1350 s->s_export_op = &reiserfs_export_ops;
1352 s->s_qcop = &reiserfs_qctl_operations;
1353 s->dq_op = &reiserfs_quota_operations;
1356 /* new format is limited by the 32 bit wide i_blocks field, want to
1357 ** be one full block below that.
1359 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1363 /* after journal replay, reread all bitmap and super blocks */
1364 static int reread_meta_blocks(struct super_block *s)
1366 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1367 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1368 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1370 "reread_meta_blocks, error reading the super");
1377 /////////////////////////////////////////////////////
1378 // hash detection stuff
1380 // if root directory is empty - we set default - Yura's - hash and
1382 // FIXME: we look for only one name in a directory. If tea and yura
1383 // bith have the same value - we ask user to send report to the
1385 static __u32 find_hash_out(struct super_block *s)
1388 struct inode *inode;
1390 INITIALIZE_PATH(path);
1391 struct reiserfs_dir_entry de;
1392 __u32 hash = DEFAULT_HASH;
1394 inode = s->s_root->d_inode;
1396 do { // Some serious "goto"-hater was there ;)
1397 u32 teahash, r5hash, yurahash;
1399 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1400 retval = search_by_entry_key(s, &key, &path, &de);
1401 if (retval == IO_ERROR) {
1405 if (retval == NAME_NOT_FOUND)
1407 set_de_name_and_namelen(&de);
1408 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1409 /* allow override in this case */
1410 if (reiserfs_rupasov_hash(s)) {
1413 reiserfs_warning(s, "FS seems to be empty, autodetect "
1414 "is using the default hash");
1417 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1418 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1419 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1420 if (((teahash == r5hash)
1422 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1423 == r5hash)) || ((teahash == yurahash)
1425 GET_HASH_VALUE(deh_offset
1430 || ((r5hash == yurahash)
1432 GET_HASH_VALUE(deh_offset
1433 (&(de.de_deh[de.de_entry_num])))))) {
1435 "Unable to automatically detect hash function. "
1436 "Please mount with -o hash={tea,rupasov,r5}",
1437 reiserfs_bdevname(s));
1441 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1444 else if (GET_HASH_VALUE
1445 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1447 else if (GET_HASH_VALUE
1448 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1451 reiserfs_warning(s, "Unrecognised hash function");
1460 // finds out which hash names are sorted with
1461 static int what_hash(struct super_block *s)
1465 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1467 /* reiserfs_hash_detect() == true if any of the hash mount options
1468 ** were used. We must check them to make sure the user isn't
1469 ** using a bad hash value
1471 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1472 code = find_hash_out(s);
1474 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1475 /* detection has found the hash, and we must check against the
1478 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1479 reiserfs_warning(s, "Error, %s hash detected, "
1480 "unable to force rupasov hash",
1481 reiserfs_hashname(code));
1483 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1484 reiserfs_warning(s, "Error, %s hash detected, "
1485 "unable to force tea hash",
1486 reiserfs_hashname(code));
1488 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1489 reiserfs_warning(s, "Error, %s hash detected, "
1490 "unable to force r5 hash",
1491 reiserfs_hashname(code));
1495 /* find_hash_out was not called or could not determine the hash */
1496 if (reiserfs_rupasov_hash(s)) {
1498 } else if (reiserfs_tea_hash(s)) {
1500 } else if (reiserfs_r5_hash(s)) {
1505 /* if we are mounted RW, and we have a new valid hash code, update
1508 if (code != UNSET_HASH &&
1509 !(s->s_flags & MS_RDONLY) &&
1510 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1511 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1516 // return pointer to appropriate function
1517 static hashf_t hash_function(struct super_block *s)
1519 switch (what_hash(s)) {
1521 reiserfs_info(s, "Using tea hash to sort names\n");
1524 reiserfs_info(s, "Using rupasov hash to sort names\n");
1527 reiserfs_info(s, "Using r5 hash to sort names\n");
1533 // this is used to set up correct value for old partitions
1534 static int function2code(hashf_t func)
1536 if (func == keyed_hash)
1538 if (func == yura_hash)
1540 if (func == r5_hash)
1543 BUG(); // should never happen
1548 #define SWARN(silent, s, ...) \
1550 reiserfs_warning (s, __VA_ARGS__)
1552 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1554 struct inode *root_inode;
1555 struct reiserfs_transaction_handle th;
1557 unsigned long blocks;
1558 unsigned int commit_max_age = 0;
1560 struct reiserfs_iget_args args;
1561 struct reiserfs_super_block *rs;
1563 struct reiserfs_sb_info *sbi;
1564 int errval = -EINVAL;
1566 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1572 /* Set default values for options: non-aggressive tails, RO on errors */
1573 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1574 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1575 /* no preallocation minimum, be smart in
1576 reiserfs_file_write instead */
1577 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1578 /* Preallocate by 16 blocks (17-1) at once */
1579 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1580 /* Initialize the rwsem for xattr dir */
1581 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1583 /* setup default block allocator options */
1584 reiserfs_init_alloc_options(s);
1587 if (reiserfs_parse_options
1588 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1589 &commit_max_age) == 0) {
1594 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1595 "for remount only");
1599 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1600 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1602 /* try new format (64-th 1k block), which can contain reiserfs super block */
1603 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1605 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1606 reiserfs_bdevname(s));
1610 /* map mount option tagxid */
1611 if (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_TAGGED))
1612 s->s_flags |= MS_TAGGED;
1614 rs = SB_DISK_SUPER_BLOCK(s);
1615 /* Let's do basic sanity check to verify that underlying device is not
1616 smaller than the filesystem. If the check fails then abort and scream,
1617 because bad stuff will happen otherwise. */
1618 if (s->s_bdev && s->s_bdev->bd_inode
1619 && i_size_read(s->s_bdev->bd_inode) <
1620 sb_block_count(rs) * sb_blocksize(rs)) {
1622 "Filesystem on %s cannot be mounted because it is bigger than the device",
1623 reiserfs_bdevname(s));
1625 "You may need to run fsck or increase size of your LVM partition");
1627 "Or may be you forgot to reboot after fdisk when it told you to");
1631 sbi->s_mount_state = SB_REISERFS_STATE(s);
1632 sbi->s_mount_state = REISERFS_VALID_FS;
1634 if ((errval = reiserfs_init_bitmap_cache(s))) {
1636 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1640 #ifdef CONFIG_REISERFS_CHECK
1641 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1642 SWARN(silent, s, "- it is slow mode for debugging.");
1645 /* make data=ordered the default */
1646 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1647 !reiserfs_data_writeback(s)) {
1648 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1651 if (reiserfs_data_log(s)) {
1652 reiserfs_info(s, "using journaled data mode\n");
1653 } else if (reiserfs_data_ordered(s)) {
1654 reiserfs_info(s, "using ordered data mode\n");
1656 reiserfs_info(s, "using writeback data mode\n");
1658 if (reiserfs_barrier_flush(s)) {
1659 printk("reiserfs: using flush barriers\n");
1661 // set_device_ro(s->s_dev, 1) ;
1662 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1664 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1667 jinit_done = 1; /* once this is set, journal_release must be called
1668 ** if we error out of the mount
1671 if (reread_meta_blocks(s)) {
1673 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1680 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1682 "clm-7000: Detected readonly device, marking FS readonly");
1683 s->s_flags |= MS_RDONLY;
1685 args.objectid = REISERFS_ROOT_OBJECTID;
1686 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1688 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1689 reiserfs_init_locked_inode, (void *)(&args));
1692 "jmacd-10: reiserfs_fill_super: get root inode failed");
1696 if (root_inode->i_state & I_NEW) {
1697 reiserfs_read_locked_inode(root_inode, &args);
1698 unlock_new_inode(root_inode);
1701 s->s_root = d_alloc_root(root_inode);
1706 // define and initialize hash function
1707 sbi->s_hash_function = hash_function(s);
1708 if (sbi->s_hash_function == NULL) {
1714 if (is_reiserfs_3_5(rs)
1715 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1716 set_bit(REISERFS_3_5, &(sbi->s_properties));
1717 else if (old_format)
1718 set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties));
1720 set_bit(REISERFS_3_6, &(sbi->s_properties));
1722 if (!(s->s_flags & MS_RDONLY)) {
1724 errval = journal_begin(&th, s, 1);
1730 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1732 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1733 set_sb_fs_state(rs, 0);
1735 if (old_format_only(s)) {
1736 /* filesystem of format 3.5 either with standard or non-standard
1738 if (convert_reiserfs(s)) {
1739 /* and -o conv is given */
1742 "converting 3.5 filesystem to the 3.6 format");
1744 if (is_reiserfs_3_5(rs))
1745 /* put magic string of 3.6 format. 2.2 will not be able to
1746 mount this filesystem anymore */
1747 memcpy(rs->s_v1.s_magic,
1748 reiserfs_3_6_magic_string,
1750 (reiserfs_3_6_magic_string));
1752 set_sb_version(rs, REISERFS_VERSION_2);
1753 reiserfs_convert_objectid_map_v1(s);
1754 set_bit(REISERFS_3_6, &(sbi->s_properties));
1755 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1756 } else if (!silent) {
1757 reiserfs_info(s, "using 3.5.x disk format\n");
1761 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1762 errval = journal_end(&th, s, 1);
1769 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1775 /* look for files which were to be removed in previous session */
1776 finish_unfinished(s);
1778 if (old_format_only(s) && !silent) {
1779 reiserfs_info(s, "using 3.5.x disk format\n");
1782 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1788 // mark hash in super block: it could be unset. overwrite should be ok
1789 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1793 reiserfs_proc_info_init(s);
1795 init_waitqueue_head(&(sbi->s_wait));
1796 spin_lock_init(&sbi->bitmap_lock);
1801 if (jinit_done) { /* kill the commit thread, free journal ram */
1802 journal_release_error(NULL, s);
1805 reiserfs_free_bitmap_cache(s);
1806 if (SB_BUFFER_WITH_SB(s))
1807 brelse(SB_BUFFER_WITH_SB(s));
1811 for (j = 0; j < MAXQUOTAS; j++) {
1812 kfree(sbi->s_qf_names[j]);
1813 sbi->s_qf_names[j] = NULL;
1819 s->s_fs_info = NULL;
1823 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1825 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1827 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1828 buf->f_bfree = sb_free_blocks(rs);
1829 buf->f_bavail = buf->f_bfree;
1830 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1831 buf->f_bsize = dentry->d_sb->s_blocksize;
1832 /* changed to accommodate gcc folks. */
1833 buf->f_type = REISERFS_SUPER_MAGIC;
1838 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1840 struct reiserfs_transaction_handle th;
1843 /* We may create quota structure so we need to reserve enough blocks */
1844 reiserfs_write_lock(inode->i_sb);
1846 journal_begin(&th, inode->i_sb,
1847 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1850 ret = dquot_initialize(inode, type);
1852 journal_end(&th, inode->i_sb,
1853 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1857 reiserfs_write_unlock(inode->i_sb);
1861 static int reiserfs_dquot_drop(struct inode *inode)
1863 struct reiserfs_transaction_handle th;
1866 /* We may delete quota structure so we need to reserve enough blocks */
1867 reiserfs_write_lock(inode->i_sb);
1869 journal_begin(&th, inode->i_sb,
1870 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1873 ret = dquot_drop(inode);
1875 journal_end(&th, inode->i_sb,
1876 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1880 reiserfs_write_unlock(inode->i_sb);
1884 static int reiserfs_write_dquot(struct dquot *dquot)
1886 struct reiserfs_transaction_handle th;
1889 reiserfs_write_lock(dquot->dq_sb);
1891 journal_begin(&th, dquot->dq_sb,
1892 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1895 ret = dquot_commit(dquot);
1897 journal_end(&th, dquot->dq_sb,
1898 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1902 reiserfs_write_unlock(dquot->dq_sb);
1906 static int reiserfs_acquire_dquot(struct dquot *dquot)
1908 struct reiserfs_transaction_handle th;
1911 reiserfs_write_lock(dquot->dq_sb);
1913 journal_begin(&th, dquot->dq_sb,
1914 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1917 ret = dquot_acquire(dquot);
1919 journal_end(&th, dquot->dq_sb,
1920 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1924 reiserfs_write_unlock(dquot->dq_sb);
1928 static int reiserfs_release_dquot(struct dquot *dquot)
1930 struct reiserfs_transaction_handle th;
1933 reiserfs_write_lock(dquot->dq_sb);
1935 journal_begin(&th, dquot->dq_sb,
1936 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1939 ret = dquot_release(dquot);
1941 journal_end(&th, dquot->dq_sb,
1942 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1946 reiserfs_write_unlock(dquot->dq_sb);
1950 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1952 /* Are we journalling quotas? */
1953 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1954 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1955 dquot_mark_dquot_dirty(dquot);
1956 return reiserfs_write_dquot(dquot);
1958 return dquot_mark_dquot_dirty(dquot);
1961 static int reiserfs_write_info(struct super_block *sb, int type)
1963 struct reiserfs_transaction_handle th;
1966 /* Data block + inode block */
1967 reiserfs_write_lock(sb);
1968 ret = journal_begin(&th, sb, 2);
1971 ret = dquot_commit_info(sb, type);
1972 err = journal_end(&th, sb, 2);
1976 reiserfs_write_unlock(sb);
1981 * Turn on quotas during mount time - we need to find the quota file and such...
1983 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1985 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
1986 REISERFS_SB(sb)->s_jquota_fmt, type);
1990 * Standard function to be called on quota_on
1992 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
1996 struct nameidata nd;
1998 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2000 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2003 /* Quotafile not on the same filesystem? */
2004 if (nd.mnt->mnt_sb != sb) {
2008 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2009 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2010 reiserfs_warning(sb,
2011 "reiserfs: Quota file must have tail packing disabled.");
2015 /* Not journalling quota? No more tests needed... */
2016 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2017 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2019 return vfs_quota_on(sb, type, format_id, path);
2021 /* Quotafile not of fs root? */
2022 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2023 reiserfs_warning(sb,
2024 "reiserfs: Quota file not on filesystem root. "
2025 "Journalled quota will not work.");
2027 return vfs_quota_on(sb, type, format_id, path);
2030 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2031 * acquiring the locks... As quota files are never truncated and quota code
2032 * itself serializes the operations (and noone else should touch the files)
2033 * we don't have to be afraid of races */
2034 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2035 size_t len, loff_t off)
2037 struct inode *inode = sb_dqopt(sb)->files[type];
2038 unsigned long blk = off >> sb->s_blocksize_bits;
2039 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2041 struct buffer_head tmp_bh, *bh;
2042 loff_t i_size = i_size_read(inode);
2046 if (off + len > i_size)
2049 while (toread > 0) {
2051 sb->s_blocksize - offset <
2052 toread ? sb->s_blocksize - offset : toread;
2054 /* Quota files are without tails so we can safely use this function */
2055 reiserfs_write_lock(sb);
2056 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2057 reiserfs_write_unlock(sb);
2060 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2061 memset(data, 0, tocopy);
2063 bh = sb_bread(sb, tmp_bh.b_blocknr);
2066 memcpy(data, bh->b_data + offset, tocopy);
2077 /* Write to quotafile (we know the transaction is already started and has
2078 * enough credits) */
2079 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2080 const char *data, size_t len, loff_t off)
2082 struct inode *inode = sb_dqopt(sb)->files[type];
2083 unsigned long blk = off >> sb->s_blocksize_bits;
2084 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2085 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2086 size_t towrite = len;
2087 struct buffer_head tmp_bh, *bh;
2089 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2090 while (towrite > 0) {
2091 tocopy = sb->s_blocksize - offset < towrite ?
2092 sb->s_blocksize - offset : towrite;
2094 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2097 if (offset || tocopy != sb->s_blocksize)
2098 bh = sb_bread(sb, tmp_bh.b_blocknr);
2100 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2106 memcpy(bh->b_data + offset, data, tocopy);
2107 flush_dcache_page(bh->b_page);
2108 set_buffer_uptodate(bh);
2110 reiserfs_prepare_for_journal(sb, bh, 1);
2111 journal_mark_dirty(current->journal_info, sb, bh);
2113 reiserfs_add_ordered_list(inode, bh);
2123 if (inode->i_size < off + len - towrite)
2124 i_size_write(inode, off + len - towrite);
2126 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2127 mark_inode_dirty(inode);
2128 mutex_unlock(&inode->i_mutex);
2129 return len - towrite;
2134 static int get_super_block(struct file_system_type *fs_type,
2135 int flags, const char *dev_name,
2136 void *data, struct vfsmount *mnt)
2138 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2142 static int __init init_reiserfs_fs(void)
2146 if ((ret = init_inodecache())) {
2150 if ((ret = reiserfs_xattr_register_handlers()))
2151 goto failed_reiserfs_xattr_register_handlers;
2153 reiserfs_proc_info_global_init();
2154 reiserfs_proc_register_global("version",
2155 reiserfs_global_version_in_proc);
2157 ret = register_filesystem(&reiserfs_fs_type);
2163 reiserfs_xattr_unregister_handlers();
2165 failed_reiserfs_xattr_register_handlers:
2166 reiserfs_proc_unregister_global("version");
2167 reiserfs_proc_info_global_done();
2168 destroy_inodecache();
2173 static void __exit exit_reiserfs_fs(void)
2175 reiserfs_xattr_unregister_handlers();
2176 reiserfs_proc_unregister_global("version");
2177 reiserfs_proc_info_global_done();
2178 unregister_filesystem(&reiserfs_fs_type);
2179 destroy_inodecache();
2182 struct file_system_type reiserfs_fs_type = {
2183 .owner = THIS_MODULE,
2185 .get_sb = get_super_block,
2186 .kill_sb = reiserfs_kill_sb,
2187 .fs_flags = FS_REQUIRES_DEV,
2190 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2191 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2192 MODULE_LICENSE("GPL");
2194 module_init(init_reiserfs_fs);
2195 module_exit(exit_reiserfs_fs);