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/config.h>
15 #include <linux/module.h>
16 #include <linux/vmalloc.h>
17 #include <linux/time.h>
18 #include <asm/uaccess.h>
19 #include <linux/reiserfs_fs.h>
20 #include <linux/reiserfs_acl.h>
21 #include <linux/reiserfs_xattr.h>
22 #include <linux/smp_lock.h>
23 #include <linux/init.h>
24 #include <linux/blkdev.h>
25 #include <linux/buffer_head.h>
26 #include <linux/vfs.h>
27 #include <linux/namespace.h>
28 #include <linux/mount.h>
29 #include <linux/namei.h>
30 #include <linux/quotaops.h>
32 struct file_system_type reiserfs_fs_type;
34 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
35 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
36 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
38 int is_reiserfs_3_5 (struct reiserfs_super_block * rs)
40 return !strncmp (rs->s_v1.s_magic, reiserfs_3_5_magic_string,
41 strlen (reiserfs_3_5_magic_string));
45 int is_reiserfs_3_6 (struct reiserfs_super_block * rs)
47 return !strncmp (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
48 strlen (reiserfs_3_6_magic_string));
52 int is_reiserfs_jr (struct reiserfs_super_block * rs)
54 return !strncmp (rs->s_v1.s_magic, reiserfs_jr_magic_string,
55 strlen (reiserfs_jr_magic_string));
59 static int is_any_reiserfs_magic_string (struct reiserfs_super_block * rs)
61 return (is_reiserfs_3_5 (rs) || is_reiserfs_3_6 (rs) ||
65 static int reiserfs_remount (struct super_block * s, int * flags, char * data);
66 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf);
68 static int reiserfs_sync_fs (struct super_block * s, int wait)
70 if (!(s->s_flags & MS_RDONLY)) {
71 struct reiserfs_transaction_handle th;
72 reiserfs_write_lock(s);
73 if (!journal_begin(&th, s, 1))
74 if (!journal_end_sync(&th, s, 1))
75 reiserfs_flush_old_commits(s);
76 s->s_dirt = 0; /* Even if it's not true.
77 * We'll loop forever in sync_supers otherwise */
78 reiserfs_write_unlock(s);
85 static void reiserfs_write_super(struct super_block *s)
87 reiserfs_sync_fs(s, 1);
90 static void reiserfs_write_super_lockfs (struct super_block * s)
92 struct reiserfs_transaction_handle th ;
93 reiserfs_write_lock(s);
94 if (!(s->s_flags & MS_RDONLY)) {
95 int err = journal_begin(&th, s, 1) ;
97 reiserfs_block_writes(&th) ;
99 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
100 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
101 reiserfs_block_writes(&th) ;
102 journal_end_sync(&th, s, 1) ;
106 reiserfs_write_unlock(s);
109 static void reiserfs_unlockfs(struct super_block *s) {
110 reiserfs_allow_writes(s) ;
113 extern const struct in_core_key MAX_IN_CORE_KEY;
116 /* this is used to delete "save link" when there are no items of a
117 file it points to. It can either happen if unlink is completed but
118 "save unlink" removal, or if file has both unlink and truncate
119 pending and as unlink completes first (because key of "save link"
120 protecting unlink is bigger that a key lf "save link" which
121 protects truncate), so there left no items to make truncate
123 static int remove_save_link_only (struct super_block * s, struct reiserfs_key * key, int oid_free)
125 struct reiserfs_transaction_handle th;
128 /* we are going to do one balancing */
129 err = journal_begin (&th, s, JOURNAL_PER_BALANCE_CNT);
133 reiserfs_delete_solid_item (&th, NULL, key);
135 /* removals are protected by direct items */
136 reiserfs_release_objectid (&th, le32_to_cpu (key->k_objectid));
138 return journal_end (&th, s, JOURNAL_PER_BALANCE_CNT);
142 static int reiserfs_quota_on_mount(struct super_block *, int);
145 /* look for uncompleted unlinks and truncates and complete them */
146 static int finish_unfinished (struct super_block * s)
148 INITIALIZE_PATH (path);
149 struct cpu_key max_cpu_key, obj_key;
150 struct reiserfs_key save_link_key;
152 struct item_head * ih;
153 struct buffer_head * bh;
157 struct inode * inode;
165 /* compose key to look for "save" links */
166 max_cpu_key.version = KEY_FORMAT_3_5;
167 max_cpu_key.on_disk_key.k_dir_id = ~0U;
168 max_cpu_key.on_disk_key.k_objectid = ~0U;
169 set_cpu_key_k_offset (&max_cpu_key, ~0U);
170 max_cpu_key.key_length = 3;
173 /* Needed for iput() to work correctly and not trash data */
174 if (s->s_flags & MS_ACTIVE) {
178 s->s_flags |= MS_ACTIVE;
180 /* Turn on quotas so that they are updated correctly */
181 for (i = 0; i < MAXQUOTAS; i++) {
182 if (REISERFS_SB(s)->s_qf_names[i]) {
183 int ret = reiserfs_quota_on_mount(s, i);
185 reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret);
191 REISERFS_SB(s)->s_is_unlinked_ok = 1;
193 retval = search_item (s, &max_cpu_key, &path);
194 if (retval != ITEM_NOT_FOUND) {
195 reiserfs_warning (s, "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)) {
203 reiserfs_warning (s, "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 = le32_to_cpu (ih->ih_key.k_objectid);
223 obj_key.on_disk_key.k_offset = 0;
224 obj_key.on_disk_key.k_type = 0;
228 inode = reiserfs_iget (s, &obj_key);
230 /* the unlink almost completed, it just did not manage to remove
231 "save" link and release objectid */
232 reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K",
234 retval = remove_save_link_only (s, &save_link_key, 1);
238 if (!truncate && inode->i_nlink) {
239 /* file is not unlinked */
240 reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked",
242 retval = remove_save_link_only (s, &save_link_key, 0);
247 if (truncate && S_ISDIR (inode->i_mode) ) {
248 /* We got a truncate request for a dir which is impossible.
249 The only imaginable way is to execute unfinished truncate request
250 then boot into old kernel, remove the file and create dir with
252 reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode));
253 retval = remove_save_link_only (s, &save_link_key, 0);
260 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
261 /* not completed truncate found. New size was committed together
263 reiserfs_info (s, "Truncating %k to %Ld ..",
264 INODE_PKEY (inode), inode->i_size);
265 reiserfs_truncate_file (inode, 0/*don't update modification time*/);
266 retval = remove_save_link (inode, truncate);
268 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
269 /* not completed unlink (rmdir) found */
270 reiserfs_info (s, "Removing %k..", INODE_PKEY (inode));
271 /* removal gets completed in iput */
279 REISERFS_SB(s)->s_is_unlinked_ok = 0;
282 /* Turn quotas off */
283 for (i = 0; i < MAXQUOTAS; i++) {
284 if (sb_dqopt(s)->files[i])
285 vfs_quota_off_mount(s, i);
288 /* Restore the flag back */
289 s->s_flags &= ~MS_ACTIVE;
293 reiserfs_info (s, "There were %d uncompleted unlinks/truncates. "
294 "Completed\n", done);
298 /* to protect file being unlinked from getting lost we "safe" link files
299 being unlinked. This link will be deleted in the same transaction with last
300 item of file. mounting the filesytem we scan all these links and remove
301 files which almost got lost */
302 void add_save_link (struct reiserfs_transaction_handle * th,
303 struct inode * inode, int truncate)
305 INITIALIZE_PATH (path);
311 BUG_ON (!th->t_trans_id);
313 /* file can only get one "save link" of each kind */
315 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ),
316 "saved link already exists for truncated inode %lx",
317 ( long ) inode -> i_ino );
319 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ),
320 "saved link already exists for unlinked inode %lx",
321 ( long ) inode -> i_ino );
323 /* setup key of "save" link */
324 key.version = KEY_FORMAT_3_5;
325 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
326 key.on_disk_key.k_objectid = inode->i_ino;
328 /* unlink, rmdir, rename */
329 set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize);
330 set_cpu_key_k_type (&key, TYPE_DIRECT);
332 /* item head of "safe" link */
333 make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
334 4/*length*/, 0xffff/*free space*/);
337 if (S_ISDIR (inode->i_mode))
338 reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode));
339 set_cpu_key_k_offset (&key, 1);
340 set_cpu_key_k_type (&key, TYPE_INDIRECT);
342 /* item head of "safe" link */
343 make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT,
344 4/*length*/, 0/*free space*/);
348 /* look for its place in the tree */
349 retval = search_item (inode->i_sb, &key, &path);
350 if (retval != ITEM_NOT_FOUND) {
351 if ( retval != -ENOSPC )
352 reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:"
353 "search_by_key (%K) returned %d", &key, retval);
358 /* body of "save" link */
359 link = INODE_PKEY (inode)->k_dir_id;
361 /* put "save" link inot tree, don't charge quota to anyone */
362 retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link);
364 if (retval != -ENOSPC)
365 reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d",
369 REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
371 REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
376 /* this opens transaction unlike add_save_link */
377 int remove_save_link (struct inode * inode, int truncate)
379 struct reiserfs_transaction_handle th;
380 struct reiserfs_key key;
383 /* we are going to do one balancing only */
384 err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
388 /* setup key of "save" link */
389 key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID);
390 key.k_objectid = INODE_PKEY (inode)->k_objectid;
392 /* unlink, rmdir, rename */
393 set_le_key_k_offset (KEY_FORMAT_3_5, &key,
394 1 + inode->i_sb->s_blocksize);
395 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT);
398 set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1);
399 set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
403 ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) ||
405 ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) )
406 /* don't take quota bytes from anywhere */
407 reiserfs_delete_solid_item (&th, NULL, &key);
409 reiserfs_release_objectid (&th, inode->i_ino);
410 REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask;
412 REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask;
414 return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
418 static void reiserfs_put_super (struct super_block * s)
421 struct reiserfs_transaction_handle th ;
424 if (REISERFS_SB(s)->xattr_root) {
425 d_invalidate (REISERFS_SB(s)->xattr_root);
426 dput (REISERFS_SB(s)->xattr_root);
429 if (REISERFS_SB(s)->priv_root) {
430 d_invalidate (REISERFS_SB(s)->priv_root);
431 dput (REISERFS_SB(s)->priv_root);
434 /* change file system state to current state if it was mounted with read-write permissions */
435 if (!(s->s_flags & MS_RDONLY)) {
436 if (!journal_begin(&th, s, 10)) {
437 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
438 set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state );
439 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
443 /* note, journal_release checks for readonly mount, and can decide not
444 ** to do a journal_end
446 journal_release(&th, s) ;
448 for (i = 0; i < SB_BMAP_NR (s); i ++)
449 brelse (SB_AP_BITMAP (s)[i].bh);
451 vfree (SB_AP_BITMAP (s));
453 brelse (SB_BUFFER_WITH_SB (s));
455 print_statistics (s);
457 if (REISERFS_SB(s)->s_kmallocs != 0) {
458 reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d",
459 REISERFS_SB(s)->s_kmallocs);
462 if (REISERFS_SB(s)->reserved_blocks != 0) {
463 reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d",
464 REISERFS_SB(s)->reserved_blocks);
467 reiserfs_proc_info_done( s );
475 static kmem_cache_t * reiserfs_inode_cachep;
477 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
479 struct reiserfs_inode_info *ei;
480 ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
483 return &ei->vfs_inode;
486 static void reiserfs_destroy_inode(struct inode *inode)
488 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
491 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
493 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo;
495 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
496 SLAB_CTOR_CONSTRUCTOR) {
497 INIT_LIST_HEAD(&ei->i_prealloc_list) ;
498 inode_init_once(&ei->vfs_inode);
499 ei->i_acl_access = NULL;
500 ei->i_acl_default = NULL;
504 static int init_inodecache(void)
506 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
507 sizeof(struct reiserfs_inode_info),
508 0, SLAB_RECLAIM_ACCOUNT,
510 if (reiserfs_inode_cachep == NULL)
515 static void destroy_inodecache(void)
517 if (kmem_cache_destroy(reiserfs_inode_cachep))
518 reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed");
521 /* we don't mark inodes dirty, we just log them */
522 static void reiserfs_dirty_inode (struct inode * inode) {
523 struct reiserfs_transaction_handle th ;
526 if (inode->i_sb->s_flags & MS_RDONLY) {
527 reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS",
531 reiserfs_write_lock(inode->i_sb);
533 /* this is really only used for atime updates, so they don't have
534 ** to be included in O_SYNC or fsync
536 err = journal_begin(&th, inode->i_sb, 1) ;
538 reiserfs_write_unlock (inode->i_sb);
541 reiserfs_update_sd (&th, inode);
542 journal_end(&th, inode->i_sb, 1) ;
543 reiserfs_write_unlock(inode->i_sb);
546 static void reiserfs_clear_inode (struct inode *inode)
548 struct posix_acl *acl;
550 acl = REISERFS_I(inode)->i_acl_access;
551 if (acl && !IS_ERR (acl))
552 posix_acl_release (acl);
553 REISERFS_I(inode)->i_acl_access = NULL;
555 acl = REISERFS_I(inode)->i_acl_default;
556 if (acl && !IS_ERR (acl))
557 posix_acl_release (acl);
558 REISERFS_I(inode)->i_acl_default = NULL;
562 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
563 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t);
566 static struct super_operations reiserfs_sops =
568 .alloc_inode = reiserfs_alloc_inode,
569 .destroy_inode = reiserfs_destroy_inode,
570 .write_inode = reiserfs_write_inode,
571 .dirty_inode = reiserfs_dirty_inode,
572 .delete_inode = reiserfs_delete_inode,
573 .clear_inode = reiserfs_clear_inode,
574 .put_super = reiserfs_put_super,
575 .write_super = reiserfs_write_super,
576 .sync_fs = reiserfs_sync_fs,
577 .write_super_lockfs = reiserfs_write_super_lockfs,
578 .unlockfs = reiserfs_unlockfs,
579 .statfs = reiserfs_statfs,
580 .remount_fs = reiserfs_remount,
582 .quota_read = reiserfs_quota_read,
583 .quota_write = reiserfs_quota_write,
588 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
590 static int reiserfs_dquot_initialize(struct inode *, int);
591 static int reiserfs_dquot_drop(struct inode *);
592 static int reiserfs_write_dquot(struct dquot *);
593 static int reiserfs_acquire_dquot(struct dquot *);
594 static int reiserfs_release_dquot(struct dquot *);
595 static int reiserfs_mark_dquot_dirty(struct dquot *);
596 static int reiserfs_write_info(struct super_block *, int);
597 static int reiserfs_quota_on(struct super_block *, int, int, char *);
599 static struct dquot_operations reiserfs_quota_operations =
601 .initialize = reiserfs_dquot_initialize,
602 .drop = reiserfs_dquot_drop,
603 .alloc_space = dquot_alloc_space,
604 .alloc_inode = dquot_alloc_inode,
605 .free_space = dquot_free_space,
606 .free_inode = dquot_free_inode,
607 .transfer = dquot_transfer,
608 .write_dquot = reiserfs_write_dquot,
609 .acquire_dquot = reiserfs_acquire_dquot,
610 .release_dquot = reiserfs_release_dquot,
611 .mark_dirty = reiserfs_mark_dquot_dirty,
612 .write_info = reiserfs_write_info,
615 static struct quotactl_ops reiserfs_qctl_operations =
617 .quota_on = reiserfs_quota_on,
618 .quota_off = vfs_quota_off,
619 .quota_sync = vfs_quota_sync,
620 .get_info = vfs_get_dqinfo,
621 .set_info = vfs_set_dqinfo,
622 .get_dqblk = vfs_get_dqblk,
623 .set_dqblk = vfs_set_dqblk,
627 static struct export_operations reiserfs_export_ops = {
628 .encode_fh = reiserfs_encode_fh,
629 .decode_fh = reiserfs_decode_fh,
630 .get_parent = reiserfs_get_parent,
631 .get_dentry = reiserfs_get_dentry,
634 /* this struct is used in reiserfs_getopt () for containing the value for those
635 mount options that have values rather than being toggles. */
638 int setmask; /* bitmask which is to set on mount_options bitmask when this
639 value is found, 0 is no bits are to be changed. */
640 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
641 value is found, 0 is no bits are to be changed. This is
642 applied BEFORE setmask */
645 /* Set this bit in arg_required to allow empty arguments */
646 #define REISERFS_OPT_ALLOWEMPTY 31
648 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
652 int arg_required; /* 0 if argument is not required, not 0 otherwise */
653 const arg_desc_t * values; /* list of values accepted by an option */
654 int setmask; /* bitmask which is to set on mount_options bitmask when this
655 value is found, 0 is no bits are to be changed. */
656 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
657 value is found, 0 is no bits are to be changed. This is
658 applied BEFORE setmask */
661 /* possible values for -o data= */
662 static const arg_desc_t logging_mode[] = {
663 {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)},
664 {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)},
665 {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)},
669 /* possible values for -o barrier= */
670 static const arg_desc_t barrier_mode[] = {
671 {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH},
672 {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE},
676 /* possible values for "-o block-allocator=" and bits which are to be set in
677 s_mount_opt of reiserfs specific part of in-core super block */
678 static const arg_desc_t balloc[] = {
679 {"noborder", 1<<REISERFS_NO_BORDER, 0},
680 {"border", 0, 1<<REISERFS_NO_BORDER},
681 {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0},
682 {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0},
683 {"test4", 1<<REISERFS_TEST4, 0},
684 {"notest4", 0, 1<<REISERFS_TEST4},
688 static const arg_desc_t tails[] = {
689 {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL},
690 {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
691 {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL},
695 static const arg_desc_t error_actions[] = {
696 {"panic", 1 << REISERFS_ERROR_PANIC,
697 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
698 {"ro-remount", 1 << REISERFS_ERROR_RO,
699 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
700 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
701 {"continue", 1 << REISERFS_ERROR_CONTINUE,
702 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
707 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
708 There might be broken applications that are
709 confused by this. Use nolargeio mount option
710 to get usual i/o size = PAGE_SIZE.
713 /* proceed only one option from a list *cur - string containing of mount options
714 opts - array of options which are accepted
715 opt_arg - if option is found and requires an argument and if it is specifed
716 in the input - pointer to the argument is stored here
717 bit_flags - if option requires to set a certain bit - it is set here
718 return -1 if unknown option is found, opt->arg_required otherwise */
719 static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg,
720 unsigned long * bit_flags)
729 const opt_desc_t * opt;
730 const arg_desc_t * arg;
735 /* assume argument cannot contain commas */
736 *cur = strchr (p, ',');
742 if ( !strncmp (p, "alloc=", 6) ) {
743 /* Ugly special case, probably we should redo options parser so that
744 it can understand several arguments for some options, also so that
745 it can fill several bitfields with option values. */
746 if ( reiserfs_parse_alloc_options( s, p + 6) ) {
754 /* for every option in the list */
755 for (opt = opts; opt->option_name; opt ++) {
756 if (!strncmp (p, opt->option_name, strlen (opt->option_name))) {
758 if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT))
759 reiserfs_warning (s, "%s not supported.", p);
761 *bit_flags &= ~opt->clrmask;
762 if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT))
763 reiserfs_warning (s, "%s not supported.", p);
765 *bit_flags |= opt->setmask;
770 if (!opt->option_name) {
771 reiserfs_warning (s, "unknown mount option \"%s\"", p);
775 p += strlen (opt->option_name);
778 if (!opt->arg_required) {
779 reiserfs_warning (s, "the option \"%s\" does not require an argument",
786 if (opt->arg_required) {
787 reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name);
792 reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name);
796 /* move to the argument, or to next option if argument is not required */
799 if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) {
800 /* this catches "option=," if not allowed */
801 reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name);
806 /* *=NULLopt_arg contains pointer to argument */
808 return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY);
811 /* values possible for this option are listed in opt->values */
812 for (arg = opt->values; arg->value; arg ++) {
813 if (!strcmp (p, arg->value)) {
815 *bit_flags &= ~arg->clrmask;
816 *bit_flags |= arg->setmask;
818 return opt->arg_required;
822 reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name);
826 /* returns 0 if something is wrong in option string, 1 - otherwise */
827 static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */
828 unsigned long * mount_options,
829 /* after the parsing phase, contains the
830 collection of bitflags defining what
831 mount options were selected. */
832 unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */
834 unsigned int * commit_max_age)
839 opt_desc_t opts[] = {
840 /* Compatibility stuff, so that -o notail for old setups still work */
841 {"tails", .arg_required = 't', .values = tails},
842 {"notail", .clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
843 {"conv", .setmask = 1<<REISERFS_CONVERT},
844 {"attrs", .setmask = 1<<REISERFS_ATTRS},
845 {"noattrs", .clrmask = 1<<REISERFS_ATTRS},
846 #ifdef CONFIG_REISERFS_FS_XATTR
847 {"user_xattr", .setmask = 1<<REISERFS_XATTRS_USER},
848 {"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER},
850 {"user_xattr", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
851 {"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
853 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
854 {"acl", .setmask = 1<<REISERFS_POSIXACL},
855 {"noacl", .clrmask = 1<<REISERFS_POSIXACL},
857 {"acl", .setmask = 1<<REISERFS_UNSUPPORTED_OPT},
858 {"noacl", .clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
860 {"nolog",}, /* This is unsupported */
861 {"replayonly", .setmask = 1<<REPLAYONLY},
862 {"block-allocator", .arg_required = 'a', .values = balloc},
863 {"data", .arg_required = 'd', .values = logging_mode},
864 {"barrier", .arg_required = 'b', .values = barrier_mode},
865 {"resize", .arg_required = 'r', .values = NULL},
866 {"jdev", .arg_required = 'j', .values = NULL},
867 {"nolargeio", .arg_required = 'w', .values = NULL},
868 {"commit", .arg_required = 'c', .values = NULL},
869 {"usrquota", .setmask = 1<<REISERFS_QUOTA},
870 {"grpquota", .setmask = 1<<REISERFS_QUOTA},
871 {"noquota", .clrmask = 1<<REISERFS_QUOTA},
872 {"errors", .arg_required = 'e', .values = error_actions},
873 {"usrjquota", .arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
874 {"grpjquota", .arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
875 {"jqfmt", .arg_required = 'f', .values = NULL},
880 if (!options || !*options)
881 /* use default configuration: create tails, journaling on, no
882 conversion to newest format */
885 for (pos = options; pos; ) {
886 c = reiserfs_getopt (s, &pos, opts, &arg, mount_options);
888 /* wrong option is given */
895 /* "resize=NNN" or "resize=auto" */
897 if (!strcmp(arg, "auto")) {
898 /* From JFS code, to auto-get the size.*/
899 *blocks = s->s_bdev->bd_inode->i_size >> s->s_blocksize_bits;
901 *blocks = simple_strtoul (arg, &p, 0);
903 /* NNN does not look like a number */
904 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
912 unsigned long val = simple_strtoul (arg, &p, 0);
913 /* commit=NNN (time in seconds) */
914 if ( *p != '\0' || val >= (unsigned int)-1) {
915 reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
918 *commit_max_age = (unsigned int)val;
923 int val = simple_strtoul (arg, &p, 0);
926 reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg);
930 reiserfs_default_io_size = PAGE_SIZE;
932 reiserfs_default_io_size = 128 * 1024;
936 if (arg && *arg && jdev_name) {
937 if ( *jdev_name ) { //Hm, already assigned?
938 reiserfs_warning (s, "reiserfs_parse_options: journal device was already specified to be %s", *jdev_name);
946 if (c == 'u' || c == 'g') {
947 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
949 if (sb_any_quota_enabled(s)) {
950 reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
953 if (*arg) { /* Some filename specified? */
954 if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) {
955 reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype));
958 if (strchr(arg, '/')) {
959 reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root.");
962 REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL);
963 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
964 reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name.");
967 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
968 *mount_options |= 1<<REISERFS_QUOTA;
971 if (REISERFS_SB(s)->s_qf_names[qtype]) {
972 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
973 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
978 if (!strcmp(arg, "vfsold"))
979 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
980 else if (!strcmp(arg, "vfsv0"))
981 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
983 reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified.");
988 if (c == 'u' || c == 'g' || c == 'f') {
989 reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported.");
996 if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
997 reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified.");
1000 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1001 if (!(*mount_options & (1<<REISERFS_QUOTA)) && sb_any_quota_enabled(s)) {
1002 reiserfs_warning(s, "reiserfs_parse_options: quota options must be present when quota is turned on.");
1010 static void switch_data_mode(struct super_block *s, unsigned long mode) {
1011 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1012 (1 << REISERFS_DATA_ORDERED) |
1013 (1 << REISERFS_DATA_WRITEBACK));
1014 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1017 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1019 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1020 if (!reiserfs_data_log(s)) {
1021 switch_data_mode(s, REISERFS_DATA_LOG);
1022 reiserfs_info (s, "switching to journaled data mode\n");
1024 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1025 if (!reiserfs_data_ordered(s)) {
1026 switch_data_mode(s, REISERFS_DATA_ORDERED);
1027 reiserfs_info (s, "switching to ordered data mode\n");
1029 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1030 if (!reiserfs_data_writeback(s)) {
1031 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1032 reiserfs_info (s, "switching to writeback data mode\n");
1037 static void handle_barrier_mode(struct super_block *s, unsigned long bits) {
1038 int flush = (1 << REISERFS_BARRIER_FLUSH);
1039 int none = (1 << REISERFS_BARRIER_NONE);
1040 int all_barrier = flush | none;
1042 if (bits & all_barrier) {
1043 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1045 REISERFS_SB(s)->s_mount_opt |= flush;
1046 printk("reiserfs: enabling write barrier flush mode\n");
1047 } else if (bits & none) {
1048 REISERFS_SB(s)->s_mount_opt |= none;
1049 printk("reiserfs: write barriers turned off\n");
1054 static void handle_attrs( struct super_block *s )
1056 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
1058 if( reiserfs_attrs( s ) ) {
1059 if( old_format_only(s) ) {
1060 reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" );
1061 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1064 if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) {
1065 reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" );
1066 REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
1068 } else if (le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared) {
1069 REISERFS_SB(s)->s_mount_opt |= REISERFS_ATTRS;
1073 static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg)
1075 struct reiserfs_super_block * rs;
1076 struct reiserfs_transaction_handle th ;
1077 unsigned long blocks;
1078 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1079 unsigned long safe_mask = 0;
1080 unsigned int commit_max_age = (unsigned int)-1;
1081 struct reiserfs_journal *journal = SB_JOURNAL(s);
1087 rs = SB_DISK_SUPER_BLOCK (s);
1089 if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1091 for (i = 0; i < MAXQUOTAS; i++)
1092 if (REISERFS_SB(s)->s_qf_names[i]) {
1093 kfree(REISERFS_SB(s)->s_qf_names[i]);
1094 REISERFS_SB(s)->s_qf_names[i] = NULL;
1102 /* Add options that are safe here */
1103 safe_mask |= 1 << REISERFS_SMALLTAIL;
1104 safe_mask |= 1 << REISERFS_LARGETAIL;
1105 safe_mask |= 1 << REISERFS_NO_BORDER;
1106 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1107 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1108 safe_mask |= 1 << REISERFS_TEST4;
1109 safe_mask |= 1 << REISERFS_ATTRS;
1110 safe_mask |= 1 << REISERFS_XATTRS_USER;
1111 safe_mask |= 1 << REISERFS_POSIXACL;
1112 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1113 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1114 safe_mask |= 1 << REISERFS_ERROR_RO;
1115 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1116 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1117 safe_mask |= 1 << REISERFS_QUOTA;
1119 /* Update the bitmask, taking care to keep
1120 * the bits we're not allowed to change here */
1121 REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1123 if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1124 journal->j_max_commit_age = commit_max_age;
1125 journal->j_max_trans_age = commit_max_age;
1127 else if(commit_max_age == 0)
1129 /* 0 means restore defaults. */
1130 journal->j_max_commit_age = journal->j_default_max_commit_age;
1131 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1135 int rc = reiserfs_resize(s, blocks);
1140 if (*mount_flags & MS_RDONLY) {
1141 reiserfs_xattr_init (s, *mount_flags);
1142 /* remount read-only */
1143 if (s->s_flags & MS_RDONLY)
1144 /* it is read-only already */
1146 /* try to remount file system with read-only permissions */
1147 if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1151 err = journal_begin(&th, s, 10) ;
1155 /* Mounting a rw partition read-only. */
1156 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1157 set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state );
1158 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1160 /* remount read-write */
1161 if (!(s->s_flags & MS_RDONLY)) {
1162 reiserfs_xattr_init (s, *mount_flags);
1163 return 0; /* We are read-write already */
1166 if (reiserfs_is_journal_aborted (journal))
1167 return journal->j_errno;
1169 handle_data_mode(s, mount_options);
1170 handle_barrier_mode(s, mount_options);
1171 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ;
1172 s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */
1173 err = journal_begin(&th, s, 10) ;
1177 /* Mount a partition which is read-only, read-write */
1178 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1179 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1180 s->s_flags &= ~MS_RDONLY;
1181 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1182 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1183 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1184 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ;
1186 /* this will force a full flush of all journal lists */
1187 SB_JOURNAL(s)->j_must_wait = 1 ;
1188 err = journal_end(&th, s, 10) ;
1193 if (!( *mount_flags & MS_RDONLY ) ) {
1194 finish_unfinished( s );
1195 reiserfs_xattr_init (s, *mount_flags);
1201 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1202 * @sb - superblock for this filesystem
1203 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1205 * This routine counts how many free bits there are, finding the first zero
1206 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1207 * a loop of find_first_zero_bit() calls. This implementation is similar to
1208 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1209 * Should only be called on fs mount, but should be fairly efficient anyways.
1211 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1212 * will * invariably occupt block 0 represented in the bitmap. The only
1213 * exception to this is when free_count also == 0, since there will be no
1214 * free blocks at all.
1217 static void load_bitmap_info_data (struct super_block *sb,
1218 struct reiserfs_bitmap_info *bi)
1220 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1222 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1224 /* No need to scan if all 0's or all 1's.
1225 * Since we're only counting 0's, we can simply ignore all 1's */
1227 if (bi->first_zero_hint == 0) {
1228 bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3;
1230 bi->free_count += sizeof(unsigned long)*8;
1231 } else if (*cur != ~0L) {
1233 for (b = 0; b < sizeof(unsigned long)*8; b++) {
1234 if (!reiserfs_test_le_bit (b, cur)) {
1236 if (bi->first_zero_hint == 0)
1237 bi->first_zero_hint =
1238 (((char *)cur - bi->bh->b_data) << 3) + b;
1245 #ifdef CONFIG_REISERFS_CHECK
1246 // This outputs a lot of unneded info on big FSes
1247 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1248 // bi->bh->b_blocknr, bi->free_count);
1252 static int read_bitmaps (struct super_block * s)
1256 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1257 if (SB_AP_BITMAP (s) == 0)
1259 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1260 for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1261 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1262 SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr);
1263 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1264 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1266 for (i = 0; i < SB_BMAP_NR(s); i++) {
1267 wait_on_buffer(SB_AP_BITMAP (s)[i].bh);
1268 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1269 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
1270 "bitmap block (#%lu) reading failed",
1271 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1272 for (i = 0; i < SB_BMAP_NR(s); i++)
1273 brelse(SB_AP_BITMAP(s)[i].bh);
1274 vfree(SB_AP_BITMAP(s));
1275 SB_AP_BITMAP(s) = NULL;
1278 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1283 static int read_old_bitmaps (struct super_block * s)
1286 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s);
1287 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1289 /* read true bitmap */
1290 SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1291 if (SB_AP_BITMAP (s) == 0)
1294 memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1296 for (i = 0; i < sb_bmap_nr(rs); i ++) {
1297 SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i);
1298 if (!SB_AP_BITMAP (s)[i].bh)
1300 load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
1306 static int read_super_block (struct super_block * s, int offset)
1308 struct buffer_head * bh;
1309 struct reiserfs_super_block * rs;
1313 bh = sb_bread (s, offset / s->s_blocksize);
1315 reiserfs_warning (s, "sh-2006: read_super_block: "
1316 "bread failed (dev %s, block %lu, size %lu)",
1317 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1321 rs = (struct reiserfs_super_block *)bh->b_data;
1322 if (!is_any_reiserfs_magic_string (rs)) {
1328 // ok, reiserfs signature (old or new) found in at the given offset
1330 fs_blocksize = sb_blocksize(rs);
1332 sb_set_blocksize (s, fs_blocksize);
1334 bh = sb_bread (s, offset / s->s_blocksize);
1336 reiserfs_warning (s, "sh-2007: read_super_block: "
1337 "bread failed (dev %s, block %lu, size %lu)\n",
1338 reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
1342 rs = (struct reiserfs_super_block *)bh->b_data;
1343 if (sb_blocksize(rs) != s->s_blocksize) {
1344 reiserfs_warning (s, "sh-2011: read_super_block: "
1345 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1346 reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize);
1351 if ( rs->s_v1.s_root_block == cpu_to_le32(-1) ) {
1353 reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1354 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1355 "get newer reiserfsprogs package");
1359 SB_BUFFER_WITH_SB (s) = bh;
1360 SB_DISK_SUPER_BLOCK (s) = rs;
1362 if (is_reiserfs_jr (rs)) {
1363 /* magic is of non-standard journal filesystem, look at s_version to
1364 find which format is in use */
1365 if (sb_version(rs) == REISERFS_VERSION_2)
1366 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\""
1367 " with non-standard journal");
1368 else if (sb_version(rs) == REISERFS_VERSION_1)
1369 reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\""
1370 " with non-standard journal");
1372 reiserfs_warning (s, "sh-2012: read_super_block: found unknown "
1373 "format \"%u\" of reiserfs with non-standard magic",
1379 /* s_version of standard format may contain incorrect information,
1380 so we just look at the magic string */
1381 reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n",
1382 is_reiserfs_3_5 (rs) ? "3.5" : "3.6");
1384 s->s_op = &reiserfs_sops;
1385 s->s_export_op = &reiserfs_export_ops;
1387 s->s_qcop = &reiserfs_qctl_operations;
1388 s->dq_op = &reiserfs_quota_operations;
1391 /* new format is limited by the 32 bit wide i_blocks field, want to
1392 ** be one full block below that.
1394 s->s_maxbytes = (512LL << 32) - s->s_blocksize ;
1400 /* after journal replay, reread all bitmap and super blocks */
1401 static int reread_meta_blocks(struct super_block *s) {
1403 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ;
1404 wait_on_buffer(SB_BUFFER_WITH_SB(s)) ;
1405 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1406 reiserfs_warning (s, "reread_meta_blocks, error reading the super") ;
1410 for (i = 0; i < SB_BMAP_NR(s) ; i++) {
1411 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ;
1412 wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ;
1413 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1414 reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu",
1415 i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ;
1424 /////////////////////////////////////////////////////
1425 // hash detection stuff
1428 // if root directory is empty - we set default - Yura's - hash and
1430 // FIXME: we look for only one name in a directory. If tea and yura
1431 // bith have the same value - we ask user to send report to the
1433 static __u32 find_hash_out (struct super_block * s)
1436 struct inode * inode;
1438 INITIALIZE_PATH (path);
1439 struct reiserfs_dir_entry de;
1440 __u32 hash = DEFAULT_HASH;
1442 inode = s->s_root->d_inode;
1444 do { // Some serious "goto"-hater was there ;)
1445 u32 teahash, r5hash, yurahash;
1447 make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3);
1448 retval = search_by_entry_key (s, &key, &path, &de);
1449 if (retval == IO_ERROR) {
1453 if (retval == NAME_NOT_FOUND)
1455 set_de_name_and_namelen (&de);
1456 if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) {
1457 /* allow override in this case */
1458 if (reiserfs_rupasov_hash(s)) {
1461 reiserfs_warning(s,"FS seems to be empty, autodetect "
1462 "is using the default hash");
1465 r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen));
1466 teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen));
1467 yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen));
1468 if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) ||
1469 ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ||
1470 ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) {
1471 reiserfs_warning(s,"Unable to automatically detect hash function. "
1472 "Please mount with -o hash={tea,rupasov,r5}",
1473 reiserfs_bdevname (s));
1477 if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash)
1479 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash)
1481 else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash)
1484 reiserfs_warning (s,"Unrecognised hash function");
1493 // finds out which hash names are sorted with
1494 static int what_hash (struct super_block * s)
1498 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1500 /* reiserfs_hash_detect() == true if any of the hash mount options
1501 ** were used. We must check them to make sure the user isn't
1502 ** using a bad hash value
1504 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1505 code = find_hash_out (s);
1507 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1508 /* detection has found the hash, and we must check against the
1511 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1512 reiserfs_warning (s, "Error, %s hash detected, "
1513 "unable to force rupasov hash", reiserfs_hashname(code)) ;
1515 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1516 reiserfs_warning (s, "Error, %s hash detected, "
1517 "unable to force tea hash", reiserfs_hashname(code)) ;
1519 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1520 reiserfs_warning (s, "Error, %s hash detected, "
1521 "unable to force r5 hash", reiserfs_hashname(code)) ;
1525 /* find_hash_out was not called or could not determine the hash */
1526 if (reiserfs_rupasov_hash(s)) {
1528 } else if (reiserfs_tea_hash(s)) {
1530 } else if (reiserfs_r5_hash(s)) {
1535 /* if we are mounted RW, and we have a new valid hash code, update
1538 if (code != UNSET_HASH &&
1539 !(s->s_flags & MS_RDONLY) &&
1540 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1541 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1546 // return pointer to appropriate function
1547 static hashf_t hash_function (struct super_block * s)
1549 switch (what_hash (s)) {
1551 reiserfs_info (s, "Using tea hash to sort names\n");
1554 reiserfs_info (s, "Using rupasov hash to sort names\n");
1557 reiserfs_info (s, "Using r5 hash to sort names\n");
1563 // this is used to set up correct value for old partitions
1564 static int function2code (hashf_t func)
1566 if (func == keyed_hash)
1568 if (func == yura_hash)
1570 if (func == r5_hash)
1573 BUG() ; // should never happen
1578 #define SWARN(silent, s, ...) \
1580 reiserfs_warning (s, __VA_ARGS__)
1582 static int reiserfs_fill_super (struct super_block * s, void * data, int silent)
1584 struct inode *root_inode;
1586 struct reiserfs_transaction_handle th ;
1588 unsigned long blocks;
1589 unsigned int commit_max_age = 0;
1590 int jinit_done = 0 ;
1591 struct reiserfs_iget_args args ;
1592 struct reiserfs_super_block * rs;
1594 struct reiserfs_sb_info *sbi;
1595 int errval = -EINVAL;
1597 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1603 memset (sbi, 0, sizeof (struct reiserfs_sb_info));
1604 /* Set default values for options: non-aggressive tails, RO on errors */
1605 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1606 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1607 /* no preallocation minimum, be smart in
1608 reiserfs_file_write instead */
1609 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1610 /* Preallocate by 16 blocks (17-1) at once */
1611 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1612 /* Initialize the rwsem for xattr dir */
1613 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1615 /* setup default block allocator options */
1616 reiserfs_init_alloc_options(s);
1619 if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) {
1624 SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1625 "for remount only");
1629 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1630 if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1632 /* try new format (64-th 1k block), which can contain reiserfs super block */
1633 else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1634 SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s));
1638 rs = SB_DISK_SUPER_BLOCK (s);
1639 /* Let's do basic sanity check to verify that underlying device is not
1640 smaller than the filesystem. If the check fails then abort and scream,
1641 because bad stuff will happen otherwise. */
1642 if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) {
1643 SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s));
1644 SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition");
1645 SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to");
1649 sbi->s_mount_state = SB_REISERFS_STATE(s);
1650 sbi->s_mount_state = REISERFS_VALID_FS ;
1652 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1653 SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1656 #ifdef CONFIG_REISERFS_CHECK
1657 SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON");
1658 SWARN (silent, s, "- it is slow mode for debugging.");
1661 /* make data=ordered the default */
1662 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1663 !reiserfs_data_writeback(s))
1665 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1668 if (reiserfs_data_log(s)) {
1669 reiserfs_info (s, "using journaled data mode\n");
1670 } else if (reiserfs_data_ordered(s)) {
1671 reiserfs_info (s, "using ordered data mode\n");
1673 reiserfs_info (s, "using writeback data mode\n");
1675 if (reiserfs_barrier_flush(s)) {
1676 printk("reiserfs: using flush barriers\n");
1679 // set_device_ro(s->s_dev, 1) ;
1680 if( journal_init(s, jdev_name, old_format, commit_max_age) ) {
1681 SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ;
1684 jinit_done = 1 ; /* once this is set, journal_release must be called
1685 ** if we error out of the mount
1688 if (reread_meta_blocks(s)) {
1689 SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ;
1693 if (replay_only (s))
1696 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1697 SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ;
1698 s->s_flags |= MS_RDONLY ;
1700 args.objectid = REISERFS_ROOT_OBJECTID ;
1701 args.dirid = REISERFS_ROOT_PARENT_OBJECTID ;
1702 root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
1704 SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed");
1708 if (root_inode->i_state & I_NEW) {
1709 reiserfs_read_locked_inode(root_inode, &args);
1710 unlock_new_inode(root_inode);
1713 s->s_root = d_alloc_root(root_inode);
1719 // define and initialize hash function
1720 sbi->s_hash_function = hash_function (s);
1721 if (sbi->s_hash_function == NULL) {
1727 if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1))
1728 set_bit(REISERFS_3_5, &(sbi->s_properties));
1730 set_bit(REISERFS_3_6, &(sbi->s_properties));
1732 if (!(s->s_flags & MS_RDONLY)) {
1734 errval = journal_begin(&th, s, 1) ;
1740 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
1742 set_sb_umount_state( rs, REISERFS_ERROR_FS );
1743 set_sb_fs_state (rs, 0);
1745 if (old_format_only(s)) {
1746 /* filesystem of format 3.5 either with standard or non-standard
1748 if (convert_reiserfs (s)) {
1749 /* and -o conv is given */
1751 reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ;
1753 if (is_reiserfs_3_5 (rs))
1754 /* put magic string of 3.6 format. 2.2 will not be able to
1755 mount this filesystem anymore */
1756 memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
1757 sizeof (reiserfs_3_6_magic_string));
1759 set_sb_version(rs,REISERFS_VERSION_2);
1760 reiserfs_convert_objectid_map_v1(s) ;
1761 set_bit(REISERFS_3_6, &(sbi->s_properties));
1762 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1763 } else if (!silent){
1764 reiserfs_info (s, "using 3.5.x disk format\n") ;
1768 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
1769 errval = journal_end(&th, s, 1) ;
1776 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1782 /* look for files which were to be removed in previous session */
1783 finish_unfinished (s);
1785 if ( old_format_only(s) && !silent) {
1786 reiserfs_info (s, "using 3.5.x disk format\n") ;
1789 if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
1795 // mark hash in super block: it could be unset. overwrite should be ok
1796 set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) );
1800 reiserfs_proc_info_init( s );
1802 init_waitqueue_head (&(sbi->s_wait));
1803 spin_lock_init(&sbi->bitmap_lock);
1808 if (jinit_done) { /* kill the commit thread, free journal ram */
1809 journal_release_error(NULL, s) ;
1811 if (SB_DISK_SUPER_BLOCK (s)) {
1812 for (j = 0; j < SB_BMAP_NR (s); j ++) {
1813 if (SB_AP_BITMAP (s))
1814 brelse (SB_AP_BITMAP (s)[j].bh);
1816 if (SB_AP_BITMAP (s))
1817 vfree (SB_AP_BITMAP (s));
1819 if (SB_BUFFER_WITH_SB (s))
1820 brelse(SB_BUFFER_WITH_SB (s));
1822 for (j = 0; j < MAXQUOTAS; j++) {
1823 if (sbi->s_qf_names[j])
1824 kfree(sbi->s_qf_names[j]);
1831 s->s_fs_info = NULL;
1836 static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf)
1838 struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
1840 buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize));
1841 buf->f_bfree = sb_free_blocks(rs);
1842 buf->f_bavail = buf->f_bfree;
1843 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1844 buf->f_bsize = s->s_blocksize;
1845 /* changed to accommodate gcc folks.*/
1846 buf->f_type = REISERFS_SUPER_MAGIC;
1851 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1853 struct reiserfs_transaction_handle th;
1856 /* We may create quota structure so we need to reserve enough blocks */
1857 reiserfs_write_lock(inode->i_sb);
1858 ret = journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1861 ret = dquot_initialize(inode, type);
1862 err = journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1866 reiserfs_write_unlock(inode->i_sb);
1870 static int reiserfs_dquot_drop(struct inode *inode)
1872 struct reiserfs_transaction_handle th;
1875 /* We may delete quota structure so we need to reserve enough blocks */
1876 reiserfs_write_lock(inode->i_sb);
1877 ret = journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1880 ret = dquot_drop(inode);
1881 err = journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1885 reiserfs_write_unlock(inode->i_sb);
1889 static int reiserfs_write_dquot(struct dquot *dquot)
1891 struct reiserfs_transaction_handle th;
1894 reiserfs_write_lock(dquot->dq_sb);
1895 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1898 ret = dquot_commit(dquot);
1899 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
1903 reiserfs_write_unlock(dquot->dq_sb);
1907 static int reiserfs_acquire_dquot(struct dquot *dquot)
1909 struct reiserfs_transaction_handle th;
1912 reiserfs_write_lock(dquot->dq_sb);
1913 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1916 ret = dquot_acquire(dquot);
1917 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
1921 reiserfs_write_unlock(dquot->dq_sb);
1925 static int reiserfs_release_dquot(struct dquot *dquot)
1927 struct reiserfs_transaction_handle th;
1930 reiserfs_write_lock(dquot->dq_sb);
1931 ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1934 ret = dquot_release(dquot);
1935 err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
1939 reiserfs_write_unlock(dquot->dq_sb);
1943 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
1945 /* Are we journalling quotas? */
1946 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
1947 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
1948 dquot_mark_dquot_dirty(dquot);
1949 return reiserfs_write_dquot(dquot);
1952 return dquot_mark_dquot_dirty(dquot);
1955 static int reiserfs_write_info(struct super_block *sb, int type)
1957 struct reiserfs_transaction_handle th;
1960 /* Data block + inode block */
1961 reiserfs_write_lock(sb);
1962 ret = journal_begin(&th, sb, 2);
1965 ret = dquot_commit_info(sb, type);
1966 err = journal_end(&th, sb, 2);
1970 reiserfs_write_unlock(sb);
1975 * Turn on quotas during mount time - we need to find the quota file and such...
1977 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
1979 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
1980 REISERFS_SB(sb)->s_jquota_fmt, type);
1984 * Standard function to be called on quota_on
1986 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
1989 struct nameidata nd;
1991 if (!(REISERFS_SB(sb)->s_mount_opt & (1<<REISERFS_QUOTA)))
1993 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
1996 /* Quotafile not on the same filesystem? */
1997 if (nd.mnt->mnt_sb != sb) {
2001 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2002 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2003 reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
2007 /* Not journalling quota? No more tests needed... */
2008 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2009 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2011 return vfs_quota_on(sb, type, format_id, path);
2013 /* Quotafile not of fs root? */
2014 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2015 reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
2016 "Journalled quota will not work.");
2018 return vfs_quota_on(sb, type, format_id, path);
2021 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2022 * acquiring the locks... As quota files are never truncated and quota code
2023 * itself serializes the operations (and noone else should touch the files)
2024 * we don't have to be afraid of races */
2025 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2026 size_t len, loff_t off)
2028 struct inode *inode = sb_dqopt(sb)->files[type];
2029 unsigned long blk = off >> sb->s_blocksize_bits;
2030 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2032 struct buffer_head tmp_bh, *bh;
2033 loff_t i_size = i_size_read(inode);
2037 if (off+len > i_size)
2040 while (toread > 0) {
2041 tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread;
2043 /* Quota files are without tails so we can safely use this function */
2044 reiserfs_write_lock(sb);
2045 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2046 reiserfs_write_unlock(sb);
2049 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2050 memset(data, 0, tocopy);
2052 bh = sb_bread(sb, tmp_bh.b_blocknr);
2055 memcpy(data, bh->b_data+offset, tocopy);
2066 /* Write to quotafile (we know the transaction is already started and has
2067 * enough credits) */
2068 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2069 const char *data, size_t len, loff_t off)
2071 struct inode *inode = sb_dqopt(sb)->files[type];
2072 unsigned long blk = off >> sb->s_blocksize_bits;
2073 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2074 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2075 size_t towrite = len;
2076 struct buffer_head tmp_bh, *bh;
2078 down(&inode->i_sem);
2079 while (towrite > 0) {
2080 tocopy = sb->s_blocksize - offset < towrite ?
2081 sb->s_blocksize - offset : towrite;
2083 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2086 if (offset || tocopy != sb->s_blocksize)
2087 bh = sb_bread(sb, tmp_bh.b_blocknr);
2089 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2095 memcpy(bh->b_data+offset, data, tocopy);
2096 flush_dcache_page(bh->b_page);
2097 set_buffer_uptodate(bh);
2099 reiserfs_prepare_for_journal(sb, bh, 1);
2100 journal_mark_dirty(current->journal_info, sb, bh);
2102 reiserfs_add_ordered_list(inode, bh);
2112 if (inode->i_size < off+len-towrite)
2113 i_size_write(inode, off+len-towrite);
2115 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2116 mark_inode_dirty(inode);
2118 return len - towrite;
2123 static struct super_block*
2124 get_super_block (struct file_system_type *fs_type, int flags,
2125 const char *dev_name, void *data)
2127 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2131 init_reiserfs_fs ( void )
2135 if ((ret = init_inodecache ())) {
2139 if ((ret = reiserfs_xattr_register_handlers ()))
2140 goto failed_reiserfs_xattr_register_handlers;
2142 reiserfs_proc_info_global_init ();
2143 reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc);
2145 ret = register_filesystem (& reiserfs_fs_type);
2151 reiserfs_xattr_unregister_handlers ();
2153 failed_reiserfs_xattr_register_handlers:
2154 reiserfs_proc_unregister_global ("version");
2155 reiserfs_proc_info_global_done ();
2156 destroy_inodecache ();
2162 exit_reiserfs_fs ( void )
2164 reiserfs_xattr_unregister_handlers ();
2165 reiserfs_proc_unregister_global ("version");
2166 reiserfs_proc_info_global_done ();
2167 unregister_filesystem (& reiserfs_fs_type);
2168 destroy_inodecache ();
2171 struct file_system_type reiserfs_fs_type = {
2172 .owner = THIS_MODULE,
2174 .get_sb = get_super_block,
2175 .kill_sb = kill_block_super,
2176 .fs_flags = FS_REQUIRES_DEV,
2179 MODULE_DESCRIPTION ("ReiserFS journaled filesystem");
2180 MODULE_AUTHOR ("Hans Reiser <reiser@namesys.com>");
2181 MODULE_LICENSE ("GPL");
2183 module_init (init_reiserfs_fs);
2184 module_exit (exit_reiserfs_fs);