1 /*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
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.
10 *
11 * NO WARRANTY
12 */
13
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/vmalloc.h>
17 #include <linux/time.h>
18 #include <linux/uaccess.h>
19 #include "reiserfs.h"
20 #include "acl.h"
21 #include "xattr.h"
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/backing-dev.h>
25 #include <linux/buffer_head.h>
26 #include <linux/exportfs.h>
27 #include <linux/quotaops.h>
28 #include <linux/vfs.h>
29 #include <linux/mount.h>
30 #include <linux/namei.h>
31 #include <linux/crc32.h>
32 #include <linux/seq_file.h>
33
34 struct file_system_type reiserfs_fs_type;
35
36 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
37 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
38 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
39
40 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
41 {
42 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
43 strlen(reiserfs_3_5_magic_string));
44 }
45
46 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
47 {
48 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
49 strlen(reiserfs_3_6_magic_string));
50 }
51
52 int is_reiserfs_jr(struct reiserfs_super_block *rs)
53 {
54 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
55 strlen(reiserfs_jr_magic_string));
56 }
57
58 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
59 {
60 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
61 is_reiserfs_jr(rs));
62 }
63
64 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
65 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
66
67 static int reiserfs_sync_fs(struct super_block *s, int wait)
68 {
69 struct reiserfs_transaction_handle th;
70
71 /*
72 * Writeback quota in non-journalled quota case - journalled quota has
73 * no dirty dquots
74 */
75 dquot_writeback_dquots(s, -1);
76 reiserfs_write_lock(s);
77 if (!journal_begin(&th, s, 1))
78 if (!journal_end_sync(&th))
79 reiserfs_flush_old_commits(s);
80 reiserfs_write_unlock(s);
81 return 0;
82 }
83
84 static void flush_old_commits(struct work_struct *work)
85 {
86 struct reiserfs_sb_info *sbi;
87 struct super_block *s;
88
89 sbi = container_of(work, struct reiserfs_sb_info, old_work.work);
90 s = sbi->s_journal->j_work_sb;
91
92 /*
93 * We need s_umount for protecting quota writeback. We have to use
94 * trylock as reiserfs_cancel_old_flush() may be waiting for this work
95 * to complete with s_umount held.
96 */
97 if (!down_read_trylock(&s->s_umount)) {
98 /* Requeue work if we are not cancelling it */
99 spin_lock(&sbi->old_work_lock);
100 if (sbi->work_queued == 1)
101 queue_delayed_work(system_long_wq, &sbi->old_work, HZ);
102 spin_unlock(&sbi->old_work_lock);
103 return;
104 }
105 spin_lock(&sbi->old_work_lock);
106 /* Avoid clobbering the cancel state... */
107 if (sbi->work_queued == 1)
108 sbi->work_queued = 0;
109 spin_unlock(&sbi->old_work_lock);
110
111 reiserfs_sync_fs(s, 1);
112 up_read(&s->s_umount);
113 }
114
115 void reiserfs_schedule_old_flush(struct super_block *s)
116 {
117 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
118 unsigned long delay;
119
120 /*
121 * Avoid scheduling flush when sb is being shut down. It can race
122 * with journal shutdown and free still queued delayed work.
123 */
124 if (sb_rdonly(s) || !(s->s_flags & SB_ACTIVE))
125 return;
126
127 spin_lock(&sbi->old_work_lock);
128 if (!sbi->work_queued) {
129 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
130 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
131 sbi->work_queued = 1;
132 }
133 spin_unlock(&sbi->old_work_lock);
134 }
135
136 void reiserfs_cancel_old_flush(struct super_block *s)
137 {
138 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
139
140 spin_lock(&sbi->old_work_lock);
141 /* Make sure no new flushes will be queued */
142 sbi->work_queued = 2;
143 spin_unlock(&sbi->old_work_lock);
144 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
145 }
146
147 static int reiserfs_freeze(struct super_block *s)
148 {
149 struct reiserfs_transaction_handle th;
150
151 reiserfs_cancel_old_flush(s);
152
153 reiserfs_write_lock(s);
154 if (!sb_rdonly(s)) {
155 int err = journal_begin(&th, s, 1);
156 if (err) {
157 reiserfs_block_writes(&th);
158 } else {
159 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
160 1);
161 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
162 reiserfs_block_writes(&th);
163 journal_end_sync(&th);
164 }
165 }
166 reiserfs_write_unlock(s);
167 return 0;
168 }
169
170 static int reiserfs_unfreeze(struct super_block *s)
171 {
172 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
173
174 reiserfs_allow_writes(s);
175 spin_lock(&sbi->old_work_lock);
176 /* Allow old_work to run again */
177 sbi->work_queued = 0;
178 spin_unlock(&sbi->old_work_lock);
179 return 0;
180 }
181
182 extern const struct in_core_key MAX_IN_CORE_KEY;
183
184 /*
185 * this is used to delete "save link" when there are no items of a
186 * file it points to. It can either happen if unlink is completed but
187 * "save unlink" removal, or if file has both unlink and truncate
188 * pending and as unlink completes first (because key of "save link"
189 * protecting unlink is bigger that a key lf "save link" which
190 * protects truncate), so there left no items to make truncate
191 * completion on
192 */
193 static int remove_save_link_only(struct super_block *s,
194 struct reiserfs_key *key, int oid_free)
195 {
196 struct reiserfs_transaction_handle th;
197 int err;
198
199 /* we are going to do one balancing */
200 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
201 if (err)
202 return err;
203
204 reiserfs_delete_solid_item(&th, NULL, key);
205 if (oid_free)
206 /* removals are protected by direct items */
207 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
208
209 return journal_end(&th);
210 }
211
212 #ifdef CONFIG_QUOTA
213 static int reiserfs_quota_on_mount(struct super_block *, int);
214 #endif
215
216 /*
217 * Look for uncompleted unlinks and truncates and complete them
218 *
219 * Called with superblock write locked. If quotas are enabled, we have to
220 * release/retake lest we call dquot_quota_on_mount(), proceed to
221 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
222 * cpu worklets to complete flush_async_commits() that in turn wait for the
223 * superblock write lock.
224 */
225 static int finish_unfinished(struct super_block *s)
226 {
227 INITIALIZE_PATH(path);
228 struct cpu_key max_cpu_key, obj_key;
229 struct reiserfs_key save_link_key, last_inode_key;
230 int retval = 0;
231 struct item_head *ih;
232 struct buffer_head *bh;
233 int item_pos;
234 char *item;
235 int done;
236 struct inode *inode;
237 int truncate;
238 #ifdef CONFIG_QUOTA
239 int i;
240 int ms_active_set;
241 int quota_enabled[REISERFS_MAXQUOTAS];
242 #endif
243
244 /* compose key to look for "save" links */
245 max_cpu_key.version = KEY_FORMAT_3_5;
246 max_cpu_key.on_disk_key.k_dir_id = ~0U;
247 max_cpu_key.on_disk_key.k_objectid = ~0U;
248 set_cpu_key_k_offset(&max_cpu_key, ~0U);
249 max_cpu_key.key_length = 3;
250
251 memset(&last_inode_key, 0, sizeof(last_inode_key));
252
253 #ifdef CONFIG_QUOTA
254 /* Needed for iput() to work correctly and not trash data */
255 if (s->s_flags & SB_ACTIVE) {
256 ms_active_set = 0;
257 } else {
258 ms_active_set = 1;
259 s->s_flags |= SB_ACTIVE;
260 }
261 /* Turn on quotas so that they are updated correctly */
262 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
263 quota_enabled[i] = 1;
264 if (REISERFS_SB(s)->s_qf_names[i]) {
265 int ret;
266
267 if (sb_has_quota_active(s, i)) {
268 quota_enabled[i] = 0;
269 continue;
270 }
271 reiserfs_write_unlock(s);
272 ret = reiserfs_quota_on_mount(s, i);
273 reiserfs_write_lock(s);
274 if (ret < 0)
275 reiserfs_warning(s, "reiserfs-2500",
276 "cannot turn on journaled "
277 "quota: error %d", ret);
278 }
279 }
280 #endif
281
282 done = 0;
283 REISERFS_SB(s)->s_is_unlinked_ok = 1;
284 while (!retval) {
285 int depth;
286 retval = search_item(s, &max_cpu_key, &path);
287 if (retval != ITEM_NOT_FOUND) {
288 reiserfs_error(s, "vs-2140",
289 "search_by_key returned %d", retval);
290 break;
291 }
292
293 bh = get_last_bh(&path);
294 item_pos = get_item_pos(&path);
295 if (item_pos != B_NR_ITEMS(bh)) {
296 reiserfs_warning(s, "vs-2060",
297 "wrong position found");
298 break;
299 }
300 item_pos--;
301 ih = item_head(bh, item_pos);
302
303 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
304 /* there are no "save" links anymore */
305 break;
306
307 save_link_key = ih->ih_key;
308 if (is_indirect_le_ih(ih))
309 truncate = 1;
310 else
311 truncate = 0;
312
313 /* reiserfs_iget needs k_dirid and k_objectid only */
314 item = ih_item_body(bh, ih);
315 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
316 obj_key.on_disk_key.k_objectid =
317 le32_to_cpu(ih->ih_key.k_objectid);
318 obj_key.on_disk_key.k_offset = 0;
319 obj_key.on_disk_key.k_type = 0;
320
321 pathrelse(&path);
322
323 inode = reiserfs_iget(s, &obj_key);
324 if (IS_ERR_OR_NULL(inode)) {
325 /*
326 * the unlink almost completed, it just did not
327 * manage to remove "save" link and release objectid
328 */
329 reiserfs_warning(s, "vs-2180", "iget failed for %K",
330 &obj_key);
331 retval = remove_save_link_only(s, &save_link_key, 1);
332 continue;
333 }
334
335 if (!truncate && inode->i_nlink) {
336 /* file is not unlinked */
337 reiserfs_warning(s, "vs-2185",
338 "file %K is not unlinked",
339 &obj_key);
340 retval = remove_save_link_only(s, &save_link_key, 0);
341 continue;
342 }
343 depth = reiserfs_write_unlock_nested(inode->i_sb);
344 dquot_initialize(inode);
345 reiserfs_write_lock_nested(inode->i_sb, depth);
346
347 if (truncate && S_ISDIR(inode->i_mode)) {
348 /*
349 * We got a truncate request for a dir which
350 * is impossible. The only imaginable way is to
351 * execute unfinished truncate request then boot
352 * into old kernel, remove the file and create dir
353 * with the same key.
354 */
355 reiserfs_warning(s, "green-2101",
356 "impossible truncate on a "
357 "directory %k. Please report",
358 INODE_PKEY(inode));
359 retval = remove_save_link_only(s, &save_link_key, 0);
360 truncate = 0;
361 iput(inode);
362 continue;
363 }
364
365 if (truncate) {
366 REISERFS_I(inode)->i_flags |=
367 i_link_saved_truncate_mask;
368 /*
369 * not completed truncate found. New size was
370 * committed together with "save" link
371 */
372 reiserfs_info(s, "Truncating %k to %lld ..",
373 INODE_PKEY(inode), inode->i_size);
374
375 /* don't update modification time */
376 reiserfs_truncate_file(inode, 0);
377
378 retval = remove_save_link(inode, truncate);
379 } else {
380 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
381 /* not completed unlink (rmdir) found */
382 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
383 if (memcmp(&last_inode_key, INODE_PKEY(inode),
384 sizeof(last_inode_key))){
385 last_inode_key = *INODE_PKEY(inode);
386 /* removal gets completed in iput */
387 retval = 0;
388 } else {
389 reiserfs_warning(s, "super-2189", "Dead loop "
390 "in finish_unfinished "
391 "detected, just remove "
392 "save link\n");
393 retval = remove_save_link_only(s,
394 &save_link_key, 0);
395 }
396 }
397
398 iput(inode);
399 printk("done\n");
400 done++;
401 }
402 REISERFS_SB(s)->s_is_unlinked_ok = 0;
403
404 #ifdef CONFIG_QUOTA
405 /* Turn quotas off */
406 reiserfs_write_unlock(s);
407 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
408 if (sb_dqopt(s)->files[i] && quota_enabled[i])
409 dquot_quota_off(s, i);
410 }
411 reiserfs_write_lock(s);
412 if (ms_active_set)
413 /* Restore the flag back */
414 s->s_flags &= ~SB_ACTIVE;
415 #endif
416 pathrelse(&path);
417 if (done)
418 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
419 "Completed\n", done);
420 return retval;
421 }
422
423 /*
424 * to protect file being unlinked from getting lost we "safe" link files
425 * being unlinked. This link will be deleted in the same transaction with last
426 * item of file. mounting the filesystem we scan all these links and remove
427 * files which almost got lost
428 */
429 void add_save_link(struct reiserfs_transaction_handle *th,
430 struct inode *inode, int truncate)
431 {
432 INITIALIZE_PATH(path);
433 int retval;
434 struct cpu_key key;
435 struct item_head ih;
436 __le32 link;
437
438 BUG_ON(!th->t_trans_id);
439
440 /* file can only get one "save link" of each kind */
441 RFALSE(truncate &&
442 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
443 "saved link already exists for truncated inode %lx",
444 (long)inode->i_ino);
445 RFALSE(!truncate &&
446 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
447 "saved link already exists for unlinked inode %lx",
448 (long)inode->i_ino);
449
450 /* setup key of "save" link */
451 key.version = KEY_FORMAT_3_5;
452 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
453 key.on_disk_key.k_objectid = inode->i_ino;
454 if (!truncate) {
455 /* unlink, rmdir, rename */
456 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
457 set_cpu_key_k_type(&key, TYPE_DIRECT);
458
459 /* item head of "safe" link */
460 make_le_item_head(&ih, &key, key.version,
461 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
462 4 /*length */ , 0xffff /*free space */ );
463 } else {
464 /* truncate */
465 if (S_ISDIR(inode->i_mode))
466 reiserfs_warning(inode->i_sb, "green-2102",
467 "Adding a truncate savelink for "
468 "a directory %k! Please report",
469 INODE_PKEY(inode));
470 set_cpu_key_k_offset(&key, 1);
471 set_cpu_key_k_type(&key, TYPE_INDIRECT);
472
473 /* item head of "safe" link */
474 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
475 4 /*length */ , 0 /*free space */ );
476 }
477 key.key_length = 3;
478
479 /* look for its place in the tree */
480 retval = search_item(inode->i_sb, &key, &path);
481 if (retval != ITEM_NOT_FOUND) {
482 if (retval != -ENOSPC)
483 reiserfs_error(inode->i_sb, "vs-2100",
484 "search_by_key (%K) returned %d", &key,
485 retval);
486 pathrelse(&path);
487 return;
488 }
489
490 /* body of "save" link */
491 link = INODE_PKEY(inode)->k_dir_id;
492
493 /* put "save" link into tree, don't charge quota to anyone */
494 retval =
495 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
496 if (retval) {
497 if (retval != -ENOSPC)
498 reiserfs_error(inode->i_sb, "vs-2120",
499 "insert_item returned %d", retval);
500 } else {
501 if (truncate)
502 REISERFS_I(inode)->i_flags |=
503 i_link_saved_truncate_mask;
504 else
505 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
506 }
507 }
508
509 /* this opens transaction unlike add_save_link */
510 int remove_save_link(struct inode *inode, int truncate)
511 {
512 struct reiserfs_transaction_handle th;
513 struct reiserfs_key key;
514 int err;
515
516 /* we are going to do one balancing only */
517 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
518 if (err)
519 return err;
520
521 /* setup key of "save" link */
522 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
523 key.k_objectid = INODE_PKEY(inode)->k_objectid;
524 if (!truncate) {
525 /* unlink, rmdir, rename */
526 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
527 1 + inode->i_sb->s_blocksize);
528 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
529 } else {
530 /* truncate */
531 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
532 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
533 }
534
535 if ((truncate &&
536 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
537 (!truncate &&
538 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
539 /* don't take quota bytes from anywhere */
540 reiserfs_delete_solid_item(&th, NULL, &key);
541 if (!truncate) {
542 reiserfs_release_objectid(&th, inode->i_ino);
543 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
544 } else
545 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
546
547 return journal_end(&th);
548 }
549
550 static void reiserfs_kill_sb(struct super_block *s)
551 {
552 if (REISERFS_SB(s)) {
553 reiserfs_proc_info_done(s);
554 /*
555 * Force any pending inode evictions to occur now. Any
556 * inodes to be removed that have extended attributes
557 * associated with them need to clean them up before
558 * we can release the extended attribute root dentries.
559 * shrink_dcache_for_umount will BUG if we don't release
560 * those before it's called so ->put_super is too late.
561 */
562 shrink_dcache_sb(s);
563
564 dput(REISERFS_SB(s)->xattr_root);
565 REISERFS_SB(s)->xattr_root = NULL;
566 dput(REISERFS_SB(s)->priv_root);
567 REISERFS_SB(s)->priv_root = NULL;
568 }
569
570 kill_block_super(s);
571 }
572
573 #ifdef CONFIG_QUOTA
574 static int reiserfs_quota_off(struct super_block *sb, int type);
575
576 static void reiserfs_quota_off_umount(struct super_block *s)
577 {
578 int type;
579
580 for (type = 0; type < REISERFS_MAXQUOTAS; type++)
581 reiserfs_quota_off(s, type);
582 }
583 #else
584 static inline void reiserfs_quota_off_umount(struct super_block *s)
585 {
586 }
587 #endif
588
589 static void reiserfs_put_super(struct super_block *s)
590 {
591 struct reiserfs_transaction_handle th;
592 th.t_trans_id = 0;
593
594 reiserfs_quota_off_umount(s);
595
596 reiserfs_write_lock(s);
597
598 /*
599 * change file system state to current state if it was mounted
600 * with read-write permissions
601 */
602 if (!sb_rdonly(s)) {
603 if (!journal_begin(&th, s, 10)) {
604 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
605 1);
606 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
607 REISERFS_SB(s)->s_mount_state);
608 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
609 }
610 }
611
612 /*
613 * note, journal_release checks for readonly mount, and can
614 * decide not to do a journal_end
615 */
616 journal_release(&th, s);
617
618 reiserfs_free_bitmap_cache(s);
619
620 brelse(SB_BUFFER_WITH_SB(s));
621
622 print_statistics(s);
623
624 if (REISERFS_SB(s)->reserved_blocks != 0) {
625 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
626 REISERFS_SB(s)->reserved_blocks);
627 }
628
629 reiserfs_write_unlock(s);
630 mutex_destroy(&REISERFS_SB(s)->lock);
631 destroy_workqueue(REISERFS_SB(s)->commit_wq);
632 kfree(REISERFS_SB(s)->s_jdev);
633 kfree(s->s_fs_info);
634 s->s_fs_info = NULL;
635 }
636
637 static struct kmem_cache *reiserfs_inode_cachep;
638
639 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
640 {
641 struct reiserfs_inode_info *ei;
642 ei = alloc_inode_sb(sb, reiserfs_inode_cachep, GFP_KERNEL);
643 if (!ei)
644 return NULL;
645 atomic_set(&ei->openers, 0);
646 mutex_init(&ei->tailpack);
647 #ifdef CONFIG_QUOTA
648 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
649 #endif
650
651 return &ei->vfs_inode;
652 }
653
654 static void reiserfs_free_inode(struct inode *inode)
655 {
656 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
657 }
658
659 static void init_once(void *foo)
660 {
661 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
662
663 INIT_LIST_HEAD(&ei->i_prealloc_list);
664 inode_init_once(&ei->vfs_inode);
665 }
666
667 static int __init init_inodecache(void)
668 {
669 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
670 sizeof(struct
671 reiserfs_inode_info),
672 0, (SLAB_RECLAIM_ACCOUNT|
673 SLAB_ACCOUNT),
674 init_once);
675 if (reiserfs_inode_cachep == NULL)
676 return -ENOMEM;
677 return 0;
678 }
679
680 static void destroy_inodecache(void)
681 {
682 /*
683 * Make sure all delayed rcu free inodes are flushed before we
684 * destroy cache.
685 */
686 rcu_barrier();
687 kmem_cache_destroy(reiserfs_inode_cachep);
688 }
689
690 /* we don't mark inodes dirty, we just log them */
691 static void reiserfs_dirty_inode(struct inode *inode, int flags)
692 {
693 struct reiserfs_transaction_handle th;
694
695 int err = 0;
696
697 if (sb_rdonly(inode->i_sb)) {
698 reiserfs_warning(inode->i_sb, "clm-6006",
699 "writing inode %lu on readonly FS",
700 inode->i_ino);
701 return;
702 }
703 reiserfs_write_lock(inode->i_sb);
704
705 /*
706 * this is really only used for atime updates, so they don't have
707 * to be included in O_SYNC or fsync
708 */
709 err = journal_begin(&th, inode->i_sb, 1);
710 if (err)
711 goto out;
712
713 reiserfs_update_sd(&th, inode);
714 journal_end(&th);
715
716 out:
717 reiserfs_write_unlock(inode->i_sb);
718 }
719
720 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
721 {
722 struct super_block *s = root->d_sb;
723 struct reiserfs_journal *journal = SB_JOURNAL(s);
724 long opts = REISERFS_SB(s)->s_mount_opt;
725
726 if (opts & (1 << REISERFS_LARGETAIL))
727 seq_puts(seq, ",tails=on");
728 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
729 seq_puts(seq, ",notail");
730 /* tails=small is default so we don't show it */
731
732 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
733 seq_puts(seq, ",barrier=none");
734 /* barrier=flush is default so we don't show it */
735
736 if (opts & (1 << REISERFS_ERROR_CONTINUE))
737 seq_puts(seq, ",errors=continue");
738 else if (opts & (1 << REISERFS_ERROR_PANIC))
739 seq_puts(seq, ",errors=panic");
740 /* errors=ro is default so we don't show it */
741
742 if (opts & (1 << REISERFS_DATA_LOG))
743 seq_puts(seq, ",data=journal");
744 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
745 seq_puts(seq, ",data=writeback");
746 /* data=ordered is default so we don't show it */
747
748 if (opts & (1 << REISERFS_ATTRS))
749 seq_puts(seq, ",attrs");
750
751 if (opts & (1 << REISERFS_XATTRS_USER))
752 seq_puts(seq, ",user_xattr");
753
754 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
755 seq_puts(seq, ",expose_privroot");
756
757 if (opts & (1 << REISERFS_POSIXACL))
758 seq_puts(seq, ",acl");
759
760 if (REISERFS_SB(s)->s_jdev)
761 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
762
763 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
764 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
765
766 #ifdef CONFIG_QUOTA
767 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
768 seq_show_option(seq, "usrjquota",
769 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
770 else if (opts & (1 << REISERFS_USRQUOTA))
771 seq_puts(seq, ",usrquota");
772 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
773 seq_show_option(seq, "grpjquota",
774 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
775 else if (opts & (1 << REISERFS_GRPQUOTA))
776 seq_puts(seq, ",grpquota");
777 if (REISERFS_SB(s)->s_jquota_fmt) {
778 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
779 seq_puts(seq, ",jqfmt=vfsold");
780 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
781 seq_puts(seq, ",jqfmt=vfsv0");
782 }
783 #endif
784
785 /* Block allocator options */
786 if (opts & (1 << REISERFS_NO_BORDER))
787 seq_puts(seq, ",block-allocator=noborder");
788 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
789 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
790 if (opts & (1 << REISERFS_HASHED_RELOCATION))
791 seq_puts(seq, ",block-allocator=hashed_relocation");
792 if (opts & (1 << REISERFS_TEST4))
793 seq_puts(seq, ",block-allocator=test4");
794 show_alloc_options(seq, s);
795 return 0;
796 }
797
798 #ifdef CONFIG_QUOTA
799 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
800 size_t, loff_t);
801 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
802 loff_t);
803
804 static struct dquot __rcu **reiserfs_get_dquots(struct inode *inode)
805 {
806 return REISERFS_I(inode)->i_dquot;
807 }
808 #endif
809
810 static const struct super_operations reiserfs_sops = {
811 .alloc_inode = reiserfs_alloc_inode,
812 .free_inode = reiserfs_free_inode,
813 .write_inode = reiserfs_write_inode,
814 .dirty_inode = reiserfs_dirty_inode,
815 .evict_inode = reiserfs_evict_inode,
816 .put_super = reiserfs_put_super,
817 .sync_fs = reiserfs_sync_fs,
818 .freeze_fs = reiserfs_freeze,
819 .unfreeze_fs = reiserfs_unfreeze,
820 .statfs = reiserfs_statfs,
821 .remount_fs = reiserfs_remount,
822 .show_options = reiserfs_show_options,
823 #ifdef CONFIG_QUOTA
824 .quota_read = reiserfs_quota_read,
825 .quota_write = reiserfs_quota_write,
826 .get_dquots = reiserfs_get_dquots,
827 #endif
828 };
829
830 #ifdef CONFIG_QUOTA
831 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
832
833 static int reiserfs_write_dquot(struct dquot *);
834 static int reiserfs_acquire_dquot(struct dquot *);
835 static int reiserfs_release_dquot(struct dquot *);
836 static int reiserfs_mark_dquot_dirty(struct dquot *);
837 static int reiserfs_write_info(struct super_block *, int);
838 static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);
839
840 static const struct dquot_operations reiserfs_quota_operations = {
841 .write_dquot = reiserfs_write_dquot,
842 .acquire_dquot = reiserfs_acquire_dquot,
843 .release_dquot = reiserfs_release_dquot,
844 .mark_dirty = reiserfs_mark_dquot_dirty,
845 .write_info = reiserfs_write_info,
846 .alloc_dquot = dquot_alloc,
847 .destroy_dquot = dquot_destroy,
848 .get_next_id = dquot_get_next_id,
849 };
850
851 static const struct quotactl_ops reiserfs_qctl_operations = {
852 .quota_on = reiserfs_quota_on,
853 .quota_off = reiserfs_quota_off,
854 .quota_sync = dquot_quota_sync,
855 .get_state = dquot_get_state,
856 .set_info = dquot_set_dqinfo,
857 .get_dqblk = dquot_get_dqblk,
858 .set_dqblk = dquot_set_dqblk,
859 };
860 #endif
861
862 static const struct export_operations reiserfs_export_ops = {
863 .encode_fh = reiserfs_encode_fh,
864 .fh_to_dentry = reiserfs_fh_to_dentry,
865 .fh_to_parent = reiserfs_fh_to_parent,
866 .get_parent = reiserfs_get_parent,
867 };
868
869 /*
870 * this struct is used in reiserfs_getopt () for containing the value for
871 * those mount options that have values rather than being toggles.
872 */
873 typedef struct {
874 char *value;
875 /*
876 * bitmask which is to set on mount_options bitmask
877 * when this value is found, 0 is no bits are to be changed.
878 */
879 int setmask;
880 /*
881 * bitmask which is to clear on mount_options bitmask
882 * when this value is found, 0 is no bits are to be changed.
883 * This is applied BEFORE setmask
884 */
885 int clrmask;
886 } arg_desc_t;
887
888 /* Set this bit in arg_required to allow empty arguments */
889 #define REISERFS_OPT_ALLOWEMPTY 31
890
891 /*
892 * this struct is used in reiserfs_getopt() for describing the
893 * set of reiserfs mount options
894 */
895 typedef struct {
896 char *option_name;
897
898 /* 0 if argument is not required, not 0 otherwise */
899 int arg_required;
900
901 /* list of values accepted by an option */
902 const arg_desc_t *values;
903
904 /*
905 * bitmask which is to set on mount_options bitmask
906 * when this value is found, 0 is no bits are to be changed.
907 */
908 int setmask;
909
910 /*
911 * bitmask which is to clear on mount_options bitmask
912 * when this value is found, 0 is no bits are to be changed.
913 * This is applied BEFORE setmask
914 */
915 int clrmask;
916 } opt_desc_t;
917
918 /* possible values for -o data= */
919 static const arg_desc_t logging_mode[] = {
920 {"ordered", 1 << REISERFS_DATA_ORDERED,
921 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
922 {"journal", 1 << REISERFS_DATA_LOG,
923 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
924 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
925 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
926 {.value = NULL}
927 };
928
929 /* possible values for -o barrier= */
930 static const arg_desc_t barrier_mode[] = {
931 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
932 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
933 {.value = NULL}
934 };
935
936 /*
937 * possible values for "-o block-allocator=" and bits which are to be set in
938 * s_mount_opt of reiserfs specific part of in-core super block
939 */
940 static const arg_desc_t balloc[] = {
941 {"noborder", 1 << REISERFS_NO_BORDER, 0},
942 {"border", 0, 1 << REISERFS_NO_BORDER},
943 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
944 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
945 {"test4", 1 << REISERFS_TEST4, 0},
946 {"notest4", 0, 1 << REISERFS_TEST4},
947 {NULL, 0, 0}
948 };
949
950 static const arg_desc_t tails[] = {
951 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
952 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
953 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
954 {NULL, 0, 0}
955 };
956
957 static const arg_desc_t error_actions[] = {
958 {"panic", 1 << REISERFS_ERROR_PANIC,
959 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
960 {"ro-remount", 1 << REISERFS_ERROR_RO,
961 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
962 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
963 {"continue", 1 << REISERFS_ERROR_CONTINUE,
964 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
965 #endif
966 {NULL, 0, 0},
967 };
968
969 /*
970 * proceed only one option from a list *cur - string containing of mount
971 * options
972 * opts - array of options which are accepted
973 * opt_arg - if option is found and requires an argument and if it is specifed
974 * in the input - pointer to the argument is stored here
975 * bit_flags - if option requires to set a certain bit - it is set here
976 * return -1 if unknown option is found, opt->arg_required otherwise
977 */
978 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
979 char **opt_arg, unsigned long *bit_flags)
980 {
981 char *p;
982 /*
983 * foo=bar,
984 * ^ ^ ^
985 * | | +-- option_end
986 * | +-- arg_start
987 * +-- option_start
988 */
989 const opt_desc_t *opt;
990 const arg_desc_t *arg;
991
992 p = *cur;
993
994 /* assume argument cannot contain commas */
995 *cur = strchr(p, ',');
996 if (*cur) {
997 *(*cur) = '\0';
998 (*cur)++;
999 }
1000
1001 if (!strncmp(p, "alloc=", 6)) {
1002 /*
1003 * Ugly special case, probably we should redo options
1004 * parser so that it can understand several arguments for
1005 * some options, also so that it can fill several bitfields
1006 * with option values.
1007 */
1008 if (reiserfs_parse_alloc_options(s, p + 6)) {
1009 return -1;
1010 } else {
1011 return 0;
1012 }
1013 }
1014
1015 /* for every option in the list */
1016 for (opt = opts; opt->option_name; opt++) {
1017 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
1018 if (bit_flags) {
1019 if (opt->clrmask ==
1020 (1 << REISERFS_UNSUPPORTED_OPT))
1021 reiserfs_warning(s, "super-6500",
1022 "%s not supported.\n",
1023 p);
1024 else
1025 *bit_flags &= ~opt->clrmask;
1026 if (opt->setmask ==
1027 (1 << REISERFS_UNSUPPORTED_OPT))
1028 reiserfs_warning(s, "super-6501",
1029 "%s not supported.\n",
1030 p);
1031 else
1032 *bit_flags |= opt->setmask;
1033 }
1034 break;
1035 }
1036 }
1037 if (!opt->option_name) {
1038 reiserfs_warning(s, "super-6502",
1039 "unknown mount option \"%s\"", p);
1040 return -1;
1041 }
1042
1043 p += strlen(opt->option_name);
1044 switch (*p) {
1045 case '=':
1046 if (!opt->arg_required) {
1047 reiserfs_warning(s, "super-6503",
1048 "the option \"%s\" does not "
1049 "require an argument\n",
1050 opt->option_name);
1051 return -1;
1052 }
1053 break;
1054
1055 case 0:
1056 if (opt->arg_required) {
1057 reiserfs_warning(s, "super-6504",
1058 "the option \"%s\" requires an "
1059 "argument\n", opt->option_name);
1060 return -1;
1061 }
1062 break;
1063 default:
1064 reiserfs_warning(s, "super-6505",
1065 "head of option \"%s\" is only correct\n",
1066 opt->option_name);
1067 return -1;
1068 }
1069
1070 /*
1071 * move to the argument, or to next option if argument is not
1072 * required
1073 */
1074 p++;
1075
1076 if (opt->arg_required
1077 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1078 && !strlen(p)) {
1079 /* this catches "option=," if not allowed */
1080 reiserfs_warning(s, "super-6506",
1081 "empty argument for \"%s\"\n",
1082 opt->option_name);
1083 return -1;
1084 }
1085
1086 if (!opt->values) {
1087 /* *=NULLopt_arg contains pointer to argument */
1088 *opt_arg = p;
1089 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1090 }
1091
1092 /* values possible for this option are listed in opt->values */
1093 for (arg = opt->values; arg->value; arg++) {
1094 if (!strcmp(p, arg->value)) {
1095 if (bit_flags) {
1096 *bit_flags &= ~arg->clrmask;
1097 *bit_flags |= arg->setmask;
1098 }
1099 return opt->arg_required;
1100 }
1101 }
1102
1103 reiserfs_warning(s, "super-6506",
1104 "bad value \"%s\" for option \"%s\"\n", p,
1105 opt->option_name);
1106 return -1;
1107 }
1108
1109 /* returns 0 if something is wrong in option string, 1 - otherwise */
1110 static int reiserfs_parse_options(struct super_block *s,
1111
1112 /* string given via mount's -o */
1113 char *options,
1114
1115 /*
1116 * after the parsing phase, contains the
1117 * collection of bitflags defining what
1118 * mount options were selected.
1119 */
1120 unsigned long *mount_options,
1121
1122 /* strtol-ed from NNN of resize=NNN */
1123 unsigned long *blocks,
1124 char **jdev_name,
1125 unsigned int *commit_max_age,
1126 char **qf_names,
1127 unsigned int *qfmt)
1128 {
1129 int c;
1130 char *arg = NULL;
1131 char *pos;
1132 opt_desc_t opts[] = {
1133 /*
1134 * Compatibility stuff, so that -o notail for old
1135 * setups still work
1136 */
1137 {"tails",.arg_required = 't',.values = tails},
1138 {"notail",.clrmask =
1139 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1140 {"conv",.setmask = 1 << REISERFS_CONVERT},
1141 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1142 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1143 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1144 #ifdef CONFIG_REISERFS_FS_XATTR
1145 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1146 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1147 #else
1148 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1149 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1150 #endif
1151 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1152 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1153 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1154 #else
1155 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1156 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1157 #endif
1158 {.option_name = "nolog"},
1159 {"replayonly",.setmask = 1 << REPLAYONLY},
1160 {"block-allocator",.arg_required = 'a',.values = balloc},
1161 {"data",.arg_required = 'd',.values = logging_mode},
1162 {"barrier",.arg_required = 'b',.values = barrier_mode},
1163 {"resize",.arg_required = 'r',.values = NULL},
1164 {"jdev",.arg_required = 'j',.values = NULL},
1165 {"nolargeio",.arg_required = 'w',.values = NULL},
1166 {"commit",.arg_required = 'c',.values = NULL},
1167 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1168 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1169 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1170 {"errors",.arg_required = 'e',.values = error_actions},
1171 {"usrjquota",.arg_required =
1172 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1173 {"grpjquota",.arg_required =
1174 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1175 {"jqfmt",.arg_required = 'f',.values = NULL},
1176 {.option_name = NULL}
1177 };
1178
1179 *blocks = 0;
1180 if (!options || !*options)
1181 /*
1182 * use default configuration: create tails, journaling on, no
1183 * conversion to newest format
1184 */
1185 return 1;
1186
1187 for (pos = options; pos;) {
1188 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1189 if (c == -1)
1190 /* wrong option is given */
1191 return 0;
1192
1193 if (c == 'r') {
1194 char *p;
1195
1196 p = NULL;
1197 /* "resize=NNN" or "resize=auto" */
1198
1199 if (!strcmp(arg, "auto")) {
1200 /* From JFS code, to auto-get the size. */
1201 *blocks = sb_bdev_nr_blocks(s);
1202 } else {
1203 *blocks = simple_strtoul(arg, &p, 0);
1204 if (*p != '\0') {
1205 /* NNN does not look like a number */
1206 reiserfs_warning(s, "super-6507",
1207 "bad value %s for "
1208 "-oresize\n", arg);
1209 return 0;
1210 }
1211 }
1212 }
1213
1214 if (c == 'c') {
1215 char *p = NULL;
1216 unsigned long val = simple_strtoul(arg, &p, 0);
1217 /* commit=NNN (time in seconds) */
1218 if (*p != '\0' || val >= (unsigned int)-1) {
1219 reiserfs_warning(s, "super-6508",
1220 "bad value %s for -ocommit\n",
1221 arg);
1222 return 0;
1223 }
1224 *commit_max_age = (unsigned int)val;
1225 }
1226
1227 if (c == 'w') {
1228 reiserfs_warning(s, "super-6509", "nolargeio option "
1229 "is no longer supported");
1230 return 0;
1231 }
1232
1233 if (c == 'j') {
1234 if (arg && *arg && jdev_name) {
1235 /* Hm, already assigned? */
1236 if (*jdev_name) {
1237 reiserfs_warning(s, "super-6510",
1238 "journal device was "
1239 "already specified to "
1240 "be %s", *jdev_name);
1241 return 0;
1242 }
1243 *jdev_name = arg;
1244 }
1245 }
1246 #ifdef CONFIG_QUOTA
1247 if (c == 'u' || c == 'g') {
1248 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1249
1250 if (sb_any_quota_loaded(s) &&
1251 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1252 reiserfs_warning(s, "super-6511",
1253 "cannot change journaled "
1254 "quota options when quota "
1255 "turned on.");
1256 return 0;
1257 }
1258 if (qf_names[qtype] !=
1259 REISERFS_SB(s)->s_qf_names[qtype])
1260 kfree(qf_names[qtype]);
1261 qf_names[qtype] = NULL;
1262 if (*arg) { /* Some filename specified? */
1263 if (REISERFS_SB(s)->s_qf_names[qtype]
1264 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1265 arg)) {
1266 reiserfs_warning(s, "super-6512",
1267 "%s quota file "
1268 "already specified.",
1269 QTYPE2NAME(qtype));
1270 return 0;
1271 }
1272 if (strchr(arg, '/')) {
1273 reiserfs_warning(s, "super-6513",
1274 "quotafile must be "
1275 "on filesystem root.");
1276 return 0;
1277 }
1278 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1279 if (!qf_names[qtype]) {
1280 reiserfs_warning(s, "reiserfs-2502",
1281 "not enough memory "
1282 "for storing "
1283 "quotafile name.");
1284 return 0;
1285 }
1286 if (qtype == USRQUOTA)
1287 *mount_options |= 1 << REISERFS_USRQUOTA;
1288 else
1289 *mount_options |= 1 << REISERFS_GRPQUOTA;
1290 } else {
1291 if (qtype == USRQUOTA)
1292 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1293 else
1294 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1295 }
1296 }
1297 if (c == 'f') {
1298 if (!strcmp(arg, "vfsold"))
1299 *qfmt = QFMT_VFS_OLD;
1300 else if (!strcmp(arg, "vfsv0"))
1301 *qfmt = QFMT_VFS_V0;
1302 else {
1303 reiserfs_warning(s, "super-6514",
1304 "unknown quota format "
1305 "specified.");
1306 return 0;
1307 }
1308 if (sb_any_quota_loaded(s) &&
1309 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1310 reiserfs_warning(s, "super-6515",
1311 "cannot change journaled "
1312 "quota options when quota "
1313 "turned on.");
1314 return 0;
1315 }
1316 }
1317 #else
1318 if (c == 'u' || c == 'g' || c == 'f') {
1319 reiserfs_warning(s, "reiserfs-2503", "journaled "
1320 "quota options not supported.");
1321 return 0;
1322 }
1323 #endif
1324 }
1325
1326 #ifdef CONFIG_QUOTA
1327 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1328 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1329 reiserfs_warning(s, "super-6515",
1330 "journaled quota format not specified.");
1331 return 0;
1332 }
1333 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1334 sb_has_quota_loaded(s, USRQUOTA)) ||
1335 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1336 sb_has_quota_loaded(s, GRPQUOTA))) {
1337 reiserfs_warning(s, "super-6516", "quota options must "
1338 "be present when quota is turned on.");
1339 return 0;
1340 }
1341 #endif
1342
1343 return 1;
1344 }
1345
1346 static void switch_data_mode(struct super_block *s, unsigned long mode)
1347 {
1348 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1349 (1 << REISERFS_DATA_ORDERED) |
1350 (1 << REISERFS_DATA_WRITEBACK));
1351 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1352 }
1353
1354 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1355 {
1356 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1357 if (!reiserfs_data_log(s)) {
1358 switch_data_mode(s, REISERFS_DATA_LOG);
1359 reiserfs_info(s, "switching to journaled data mode\n");
1360 }
1361 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1362 if (!reiserfs_data_ordered(s)) {
1363 switch_data_mode(s, REISERFS_DATA_ORDERED);
1364 reiserfs_info(s, "switching to ordered data mode\n");
1365 }
1366 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1367 if (!reiserfs_data_writeback(s)) {
1368 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1369 reiserfs_info(s, "switching to writeback data mode\n");
1370 }
1371 }
1372 }
1373
1374 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1375 {
1376 int flush = (1 << REISERFS_BARRIER_FLUSH);
1377 int none = (1 << REISERFS_BARRIER_NONE);
1378 int all_barrier = flush | none;
1379
1380 if (bits & all_barrier) {
1381 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1382 if (bits & flush) {
1383 REISERFS_SB(s)->s_mount_opt |= flush;
1384 printk("reiserfs: enabling write barrier flush mode\n");
1385 } else if (bits & none) {
1386 REISERFS_SB(s)->s_mount_opt |= none;
1387 printk("reiserfs: write barriers turned off\n");
1388 }
1389 }
1390 }
1391
1392 static void handle_attrs(struct super_block *s)
1393 {
1394 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1395
1396 if (reiserfs_attrs(s)) {
1397 if (old_format_only(s)) {
1398 reiserfs_warning(s, "super-6517", "cannot support "
1399 "attributes on 3.5.x disk format");
1400 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1401 return;
1402 }
1403 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1404 reiserfs_warning(s, "super-6518", "cannot support "
1405 "attributes until flag is set in "
1406 "super-block");
1407 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1408 }
1409 }
1410 }
1411
1412 #ifdef CONFIG_QUOTA
1413 static void handle_quota_files(struct super_block *s, char **qf_names,
1414 unsigned int *qfmt)
1415 {
1416 int i;
1417
1418 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1419 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1420 kfree(REISERFS_SB(s)->s_qf_names[i]);
1421 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1422 }
1423 if (*qfmt)
1424 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1425 }
1426 #endif
1427
1428 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1429 {
1430 struct reiserfs_super_block *rs;
1431 struct reiserfs_transaction_handle th;
1432 unsigned long blocks;
1433 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1434 unsigned long safe_mask = 0;
1435 unsigned int commit_max_age = (unsigned int)-1;
1436 struct reiserfs_journal *journal = SB_JOURNAL(s);
1437 int err;
1438 char *qf_names[REISERFS_MAXQUOTAS];
1439 unsigned int qfmt = 0;
1440 #ifdef CONFIG_QUOTA
1441 int i;
1442 #endif
1443
1444 sync_filesystem(s);
1445 reiserfs_write_lock(s);
1446
1447 #ifdef CONFIG_QUOTA
1448 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1449 #endif
1450
1451 rs = SB_DISK_SUPER_BLOCK(s);
1452
1453 if (!reiserfs_parse_options
1454 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1455 qf_names, &qfmt)) {
1456 #ifdef CONFIG_QUOTA
1457 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1458 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1459 kfree(qf_names[i]);
1460 #endif
1461 err = -EINVAL;
1462 goto out_err_unlock;
1463 }
1464 #ifdef CONFIG_QUOTA
1465 handle_quota_files(s, qf_names, &qfmt);
1466 #endif
1467
1468 handle_attrs(s);
1469
1470 /* Add options that are safe here */
1471 safe_mask |= 1 << REISERFS_SMALLTAIL;
1472 safe_mask |= 1 << REISERFS_LARGETAIL;
1473 safe_mask |= 1 << REISERFS_NO_BORDER;
1474 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1475 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1476 safe_mask |= 1 << REISERFS_TEST4;
1477 safe_mask |= 1 << REISERFS_ATTRS;
1478 safe_mask |= 1 << REISERFS_XATTRS_USER;
1479 safe_mask |= 1 << REISERFS_POSIXACL;
1480 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1481 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1482 safe_mask |= 1 << REISERFS_ERROR_RO;
1483 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1484 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1485 safe_mask |= 1 << REISERFS_USRQUOTA;
1486 safe_mask |= 1 << REISERFS_GRPQUOTA;
1487
1488 /*
1489 * Update the bitmask, taking care to keep
1490 * the bits we're not allowed to change here
1491 */
1492 REISERFS_SB(s)->s_mount_opt =
1493 (REISERFS_SB(s)->
1494 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1495
1496 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1497 journal->j_max_commit_age = commit_max_age;
1498 journal->j_max_trans_age = commit_max_age;
1499 } else if (commit_max_age == 0) {
1500 /* 0 means restore defaults. */
1501 journal->j_max_commit_age = journal->j_default_max_commit_age;
1502 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1503 }
1504
1505 if (blocks) {
1506 err = reiserfs_resize(s, blocks);
1507 if (err != 0)
1508 goto out_err_unlock;
1509 }
1510
1511 if (*mount_flags & SB_RDONLY) {
1512 reiserfs_write_unlock(s);
1513 reiserfs_xattr_init(s, *mount_flags);
1514 /* remount read-only */
1515 if (sb_rdonly(s))
1516 /* it is read-only already */
1517 goto out_ok_unlocked;
1518
1519 err = dquot_suspend(s, -1);
1520 if (err < 0)
1521 goto out_err;
1522
1523 /* try to remount file system with read-only permissions */
1524 if (sb_umount_state(rs) == REISERFS_VALID_FS
1525 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1526 goto out_ok_unlocked;
1527 }
1528
1529 reiserfs_write_lock(s);
1530
1531 err = journal_begin(&th, s, 10);
1532 if (err)
1533 goto out_err_unlock;
1534
1535 /* Mounting a rw partition read-only. */
1536 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1537 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1538 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1539 } else {
1540 /* remount read-write */
1541 if (!sb_rdonly(s)) {
1542 reiserfs_write_unlock(s);
1543 reiserfs_xattr_init(s, *mount_flags);
1544 goto out_ok_unlocked; /* We are read-write already */
1545 }
1546
1547 if (reiserfs_is_journal_aborted(journal)) {
1548 err = journal->j_errno;
1549 goto out_err_unlock;
1550 }
1551
1552 handle_data_mode(s, mount_options);
1553 handle_barrier_mode(s, mount_options);
1554 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1555
1556 /* now it is safe to call journal_begin */
1557 s->s_flags &= ~SB_RDONLY;
1558 err = journal_begin(&th, s, 10);
1559 if (err)
1560 goto out_err_unlock;
1561
1562 /* Mount a partition which is read-only, read-write */
1563 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1564 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1565 s->s_flags &= ~SB_RDONLY;
1566 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1567 if (!old_format_only(s))
1568 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1569 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1570 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1571 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1572 }
1573 /* this will force a full flush of all journal lists */
1574 SB_JOURNAL(s)->j_must_wait = 1;
1575 err = journal_end(&th);
1576 if (err)
1577 goto out_err_unlock;
1578
1579 reiserfs_write_unlock(s);
1580 if (!(*mount_flags & SB_RDONLY)) {
1581 dquot_resume(s, -1);
1582 reiserfs_write_lock(s);
1583 finish_unfinished(s);
1584 reiserfs_write_unlock(s);
1585 reiserfs_xattr_init(s, *mount_flags);
1586 }
1587
1588 out_ok_unlocked:
1589 return 0;
1590
1591 out_err_unlock:
1592 reiserfs_write_unlock(s);
1593 out_err:
1594 return err;
1595 }
1596
1597 static int read_super_block(struct super_block *s, int offset)
1598 {
1599 struct buffer_head *bh;
1600 struct reiserfs_super_block *rs;
1601 int fs_blocksize;
1602
1603 bh = sb_bread(s, offset / s->s_blocksize);
1604 if (!bh) {
1605 reiserfs_warning(s, "sh-2006",
1606 "bread failed (dev %s, block %lu, size %lu)",
1607 s->s_id, offset / s->s_blocksize,
1608 s->s_blocksize);
1609 return 1;
1610 }
1611
1612 rs = (struct reiserfs_super_block *)bh->b_data;
1613 if (!is_any_reiserfs_magic_string(rs)) {
1614 brelse(bh);
1615 return 1;
1616 }
1617 /*
1618 * ok, reiserfs signature (old or new) found in at the given offset
1619 */
1620 fs_blocksize = sb_blocksize(rs);
1621 brelse(bh);
1622 sb_set_blocksize(s, fs_blocksize);
1623
1624 bh = sb_bread(s, offset / s->s_blocksize);
1625 if (!bh) {
1626 reiserfs_warning(s, "sh-2007",
1627 "bread failed (dev %s, block %lu, size %lu)",
1628 s->s_id, offset / s->s_blocksize,
1629 s->s_blocksize);
1630 return 1;
1631 }
1632
1633 rs = (struct reiserfs_super_block *)bh->b_data;
1634 if (sb_blocksize(rs) != s->s_blocksize) {
1635 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1636 "filesystem on (dev %s, block %llu, size %lu)",
1637 s->s_id,
1638 (unsigned long long)bh->b_blocknr,
1639 s->s_blocksize);
1640 brelse(bh);
1641 return 1;
1642 }
1643
1644 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1645 brelse(bh);
1646 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1647 "--rebuild-tree run detected. Please run\n"
1648 "reiserfsck --rebuild-tree and wait for a "
1649 "completion. If that fails\n"
1650 "get newer reiserfsprogs package");
1651 return 1;
1652 }
1653
1654 reiserfs_warning(NULL, "", "reiserfs filesystem is deprecated and "
1655 "scheduled to be removed from the kernel in 2025");
1656 SB_BUFFER_WITH_SB(s) = bh;
1657 SB_DISK_SUPER_BLOCK(s) = rs;
1658
1659 /*
1660 * magic is of non-standard journal filesystem, look at s_version to
1661 * find which format is in use
1662 */
1663 if (is_reiserfs_jr(rs)) {
1664 if (sb_version(rs) == REISERFS_VERSION_2)
1665 reiserfs_info(s, "found reiserfs format \"3.6\""
1666 " with non-standard journal\n");
1667 else if (sb_version(rs) == REISERFS_VERSION_1)
1668 reiserfs_info(s, "found reiserfs format \"3.5\""
1669 " with non-standard journal\n");
1670 else {
1671 reiserfs_warning(s, "sh-2012", "found unknown "
1672 "format \"%u\" of reiserfs with "
1673 "non-standard magic", sb_version(rs));
1674 return 1;
1675 }
1676 } else
1677 /*
1678 * s_version of standard format may contain incorrect
1679 * information, so we just look at the magic string
1680 */
1681 reiserfs_info(s,
1682 "found reiserfs format \"%s\" with standard journal\n",
1683 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1684
1685 s->s_op = &reiserfs_sops;
1686 s->s_export_op = &reiserfs_export_ops;
1687 #ifdef CONFIG_QUOTA
1688 s->s_qcop = &reiserfs_qctl_operations;
1689 s->dq_op = &reiserfs_quota_operations;
1690 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1691 #endif
1692
1693 /*
1694 * new format is limited by the 32 bit wide i_blocks field, want to
1695 * be one full block below that.
1696 */
1697 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1698 return 0;
1699 }
1700
1701 /* after journal replay, reread all bitmap and super blocks */
1702 static int reread_meta_blocks(struct super_block *s)
1703 {
1704 if (bh_read(SB_BUFFER_WITH_SB(s), 0) < 0) {
1705 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1706 return 1;
1707 }
1708
1709 return 0;
1710 }
1711
1712 /* hash detection stuff */
1713
1714 /*
1715 * if root directory is empty - we set default - Yura's - hash and
1716 * warn about it
1717 * FIXME: we look for only one name in a directory. If tea and yura
1718 * both have the same value - we ask user to send report to the
1719 * mailing list
1720 */
1721 static __u32 find_hash_out(struct super_block *s)
1722 {
1723 int retval;
1724 struct inode *inode;
1725 struct cpu_key key;
1726 INITIALIZE_PATH(path);
1727 struct reiserfs_dir_entry de;
1728 struct reiserfs_de_head *deh;
1729 __u32 hash = DEFAULT_HASH;
1730 __u32 deh_hashval, teahash, r5hash, yurahash;
1731
1732 inode = d_inode(s->s_root);
1733
1734 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1735 retval = search_by_entry_key(s, &key, &path, &de);
1736 if (retval == IO_ERROR) {
1737 pathrelse(&path);
1738 return UNSET_HASH;
1739 }
1740 if (retval == NAME_NOT_FOUND)
1741 de.de_entry_num--;
1742
1743 set_de_name_and_namelen(&de);
1744 deh = de.de_deh + de.de_entry_num;
1745
1746 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1747 /* allow override in this case */
1748 if (reiserfs_rupasov_hash(s))
1749 hash = YURA_HASH;
1750 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1751 goto out;
1752 }
1753
1754 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1755 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1756 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1757 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1758
1759 if ((teahash == r5hash && deh_hashval == r5hash) ||
1760 (teahash == yurahash && deh_hashval == yurahash) ||
1761 (r5hash == yurahash && deh_hashval == yurahash)) {
1762 reiserfs_warning(s, "reiserfs-2506",
1763 "Unable to automatically detect hash "
1764 "function. Please mount with -o "
1765 "hash={tea,rupasov,r5}");
1766 hash = UNSET_HASH;
1767 goto out;
1768 }
1769
1770 if (deh_hashval == yurahash)
1771 hash = YURA_HASH;
1772 else if (deh_hashval == teahash)
1773 hash = TEA_HASH;
1774 else if (deh_hashval == r5hash)
1775 hash = R5_HASH;
1776 else {
1777 reiserfs_warning(s, "reiserfs-2506",
1778 "Unrecognised hash function");
1779 hash = UNSET_HASH;
1780 }
1781 out:
1782 pathrelse(&path);
1783 return hash;
1784 }
1785
1786 /* finds out which hash names are sorted with */
1787 static int what_hash(struct super_block *s)
1788 {
1789 __u32 code;
1790
1791 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1792
1793 /*
1794 * reiserfs_hash_detect() == true if any of the hash mount options
1795 * were used. We must check them to make sure the user isn't
1796 * using a bad hash value
1797 */
1798 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1799 code = find_hash_out(s);
1800
1801 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1802 /*
1803 * detection has found the hash, and we must check against the
1804 * mount options
1805 */
1806 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1807 reiserfs_warning(s, "reiserfs-2507",
1808 "Error, %s hash detected, "
1809 "unable to force rupasov hash",
1810 reiserfs_hashname(code));
1811 code = UNSET_HASH;
1812 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1813 reiserfs_warning(s, "reiserfs-2508",
1814 "Error, %s hash detected, "
1815 "unable to force tea hash",
1816 reiserfs_hashname(code));
1817 code = UNSET_HASH;
1818 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1819 reiserfs_warning(s, "reiserfs-2509",
1820 "Error, %s hash detected, "
1821 "unable to force r5 hash",
1822 reiserfs_hashname(code));
1823 code = UNSET_HASH;
1824 }
1825 } else {
1826 /*
1827 * find_hash_out was not called or
1828 * could not determine the hash
1829 */
1830 if (reiserfs_rupasov_hash(s)) {
1831 code = YURA_HASH;
1832 } else if (reiserfs_tea_hash(s)) {
1833 code = TEA_HASH;
1834 } else if (reiserfs_r5_hash(s)) {
1835 code = R5_HASH;
1836 }
1837 }
1838
1839 /*
1840 * if we are mounted RW, and we have a new valid hash code, update
1841 * the super
1842 */
1843 if (code != UNSET_HASH &&
1844 !sb_rdonly(s) &&
1845 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1846 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1847 }
1848 return code;
1849 }
1850
1851 /* return pointer to appropriate function */
1852 static hashf_t hash_function(struct super_block *s)
1853 {
1854 switch (what_hash(s)) {
1855 case TEA_HASH:
1856 reiserfs_info(s, "Using tea hash to sort names\n");
1857 return keyed_hash;
1858 case YURA_HASH:
1859 reiserfs_info(s, "Using rupasov hash to sort names\n");
1860 return yura_hash;
1861 case R5_HASH:
1862 reiserfs_info(s, "Using r5 hash to sort names\n");
1863 return r5_hash;
1864 }
1865 return NULL;
1866 }
1867
1868 /* this is used to set up correct value for old partitions */
1869 static int function2code(hashf_t func)
1870 {
1871 if (func == keyed_hash)
1872 return TEA_HASH;
1873 if (func == yura_hash)
1874 return YURA_HASH;
1875 if (func == r5_hash)
1876 return R5_HASH;
1877
1878 BUG(); /* should never happen */
1879
1880 return 0;
1881 }
1882
1883 #define SWARN(silent, s, id, ...) \
1884 if (!(silent)) \
1885 reiserfs_warning(s, id, __VA_ARGS__)
1886
1887 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1888 {
1889 struct inode *root_inode;
1890 struct reiserfs_transaction_handle th;
1891 int old_format = 0;
1892 unsigned long blocks;
1893 unsigned int commit_max_age = 0;
1894 int jinit_done = 0;
1895 struct reiserfs_iget_args args;
1896 struct reiserfs_super_block *rs;
1897 char *jdev_name;
1898 struct reiserfs_sb_info *sbi;
1899 int errval = -EINVAL;
1900 char *qf_names[REISERFS_MAXQUOTAS] = {};
1901 unsigned int qfmt = 0;
1902
1903 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1904 if (!sbi)
1905 return -ENOMEM;
1906 s->s_fs_info = sbi;
1907 /* Set default values for options: non-aggressive tails, RO on errors */
1908 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1909 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1910 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1911 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1912 sbi->s_alloc_options.preallocmin = 0;
1913 /* Preallocate by 16 blocks (17-1) at once */
1914 sbi->s_alloc_options.preallocsize = 17;
1915 /* setup default block allocator options */
1916 reiserfs_init_alloc_options(s);
1917
1918 spin_lock_init(&sbi->old_work_lock);
1919 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1920 mutex_init(&sbi->lock);
1921 sbi->lock_depth = -1;
1922
1923 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1924 s->s_id);
1925 if (!sbi->commit_wq) {
1926 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1927 errval = -ENOMEM;
1928 goto error_unlocked;
1929 }
1930
1931 jdev_name = NULL;
1932 if (reiserfs_parse_options
1933 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1934 &commit_max_age, qf_names, &qfmt) == 0) {
1935 goto error_unlocked;
1936 }
1937 if (jdev_name && jdev_name[0]) {
1938 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1939 if (!sbi->s_jdev) {
1940 SWARN(silent, s, "", "Cannot allocate memory for "
1941 "journal device name");
1942 goto error_unlocked;
1943 }
1944 }
1945 #ifdef CONFIG_QUOTA
1946 handle_quota_files(s, qf_names, &qfmt);
1947 #endif
1948
1949 if (blocks) {
1950 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1951 goto error_unlocked;
1952 }
1953
1954 /*
1955 * try old format (undistributed bitmap, super block in 8-th 1k
1956 * block of a device)
1957 */
1958 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1959 old_format = 1;
1960
1961 /*
1962 * try new format (64-th 1k block), which can contain reiserfs
1963 * super block
1964 */
1965 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1966 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1967 s->s_id);
1968 goto error_unlocked;
1969 }
1970
1971 s->s_time_min = 0;
1972 s->s_time_max = U32_MAX;
1973
1974 rs = SB_DISK_SUPER_BLOCK(s);
1975 /*
1976 * Let's do basic sanity check to verify that underlying device is not
1977 * smaller than the filesystem. If the check fails then abort and
1978 * scream, because bad stuff will happen otherwise.
1979 */
1980 if (bdev_nr_bytes(s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) {
1981 SWARN(silent, s, "", "Filesystem cannot be "
1982 "mounted because it is bigger than the device");
1983 SWARN(silent, s, "", "You may need to run fsck "
1984 "or increase size of your LVM partition");
1985 SWARN(silent, s, "", "Or may be you forgot to "
1986 "reboot after fdisk when it told you to");
1987 goto error_unlocked;
1988 }
1989
1990 sbi->s_mount_state = SB_REISERFS_STATE(s);
1991 sbi->s_mount_state = REISERFS_VALID_FS;
1992
1993 if ((errval = reiserfs_init_bitmap_cache(s))) {
1994 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1995 goto error_unlocked;
1996 }
1997
1998 errval = -EINVAL;
1999 #ifdef CONFIG_REISERFS_CHECK
2000 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
2001 SWARN(silent, s, "", "- it is slow mode for debugging.");
2002 #endif
2003
2004 /* make data=ordered the default */
2005 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
2006 !reiserfs_data_writeback(s)) {
2007 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
2008 }
2009
2010 if (reiserfs_data_log(s)) {
2011 reiserfs_info(s, "using journaled data mode\n");
2012 } else if (reiserfs_data_ordered(s)) {
2013 reiserfs_info(s, "using ordered data mode\n");
2014 } else {
2015 reiserfs_info(s, "using writeback data mode\n");
2016 }
2017 if (reiserfs_barrier_flush(s)) {
2018 printk("reiserfs: using flush barriers\n");
2019 }
2020
2021 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2022 SWARN(silent, s, "sh-2022",
2023 "unable to initialize journal space");
2024 goto error_unlocked;
2025 } else {
2026 /*
2027 * once this is set, journal_release must be called
2028 * if we error out of the mount
2029 */
2030 jinit_done = 1;
2031 }
2032
2033 if (reread_meta_blocks(s)) {
2034 SWARN(silent, s, "jmacd-9",
2035 "unable to reread meta blocks after journal init");
2036 goto error_unlocked;
2037 }
2038
2039 if (replay_only(s))
2040 goto error_unlocked;
2041
2042 s->s_xattr = reiserfs_xattr_handlers;
2043
2044 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) {
2045 SWARN(silent, s, "clm-7000",
2046 "Detected readonly device, marking FS readonly");
2047 s->s_flags |= SB_RDONLY;
2048 }
2049 args.objectid = REISERFS_ROOT_OBJECTID;
2050 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2051 root_inode =
2052 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2053 reiserfs_init_locked_inode, (void *)&args);
2054 if (!root_inode) {
2055 SWARN(silent, s, "jmacd-10", "get root inode failed");
2056 goto error_unlocked;
2057 }
2058
2059 /*
2060 * This path assumed to be called with the BKL in the old times.
2061 * Now we have inherited the big reiserfs lock from it and many
2062 * reiserfs helpers called in the mount path and elsewhere require
2063 * this lock to be held even if it's not always necessary. Let's be
2064 * conservative and hold it early. The window can be reduced after
2065 * careful review of the code.
2066 */
2067 reiserfs_write_lock(s);
2068
2069 if (root_inode->i_state & I_NEW) {
2070 reiserfs_read_locked_inode(root_inode, &args);
2071 unlock_new_inode(root_inode);
2072 }
2073
2074 if (!S_ISDIR(root_inode->i_mode) || !inode_get_bytes(root_inode) ||
2075 !root_inode->i_size) {
2076 SWARN(silent, s, "", "corrupt root inode, run fsck");
2077 iput(root_inode);
2078 errval = -EUCLEAN;
2079 goto error;
2080 }
2081
2082 s->s_root = d_make_root(root_inode);
2083 if (!s->s_root)
2084 goto error;
2085 /* define and initialize hash function */
2086 sbi->s_hash_function = hash_function(s);
2087 if (sbi->s_hash_function == NULL) {
2088 dput(s->s_root);
2089 s->s_root = NULL;
2090 goto error;
2091 }
2092
2093 if (is_reiserfs_3_5(rs)
2094 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2095 set_bit(REISERFS_3_5, &sbi->s_properties);
2096 else if (old_format)
2097 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2098 else
2099 set_bit(REISERFS_3_6, &sbi->s_properties);
2100
2101 if (!sb_rdonly(s)) {
2102
2103 errval = journal_begin(&th, s, 1);
2104 if (errval) {
2105 dput(s->s_root);
2106 s->s_root = NULL;
2107 goto error;
2108 }
2109 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2110
2111 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2112 set_sb_fs_state(rs, 0);
2113
2114 /*
2115 * Clear out s_bmap_nr if it would wrap. We can handle this
2116 * case, but older revisions can't. This will cause the
2117 * file system to fail mount on those older implementations,
2118 * avoiding corruption. -jeffm
2119 */
2120 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2121 sb_bmap_nr(rs) != 0) {
2122 reiserfs_warning(s, "super-2030", "This file system "
2123 "claims to use %u bitmap blocks in "
2124 "its super block, but requires %u. "
2125 "Clearing to zero.", sb_bmap_nr(rs),
2126 reiserfs_bmap_count(s));
2127
2128 set_sb_bmap_nr(rs, 0);
2129 }
2130
2131 if (old_format_only(s)) {
2132 /*
2133 * filesystem of format 3.5 either with standard
2134 * or non-standard journal
2135 */
2136 if (convert_reiserfs(s)) {
2137 /* and -o conv is given */
2138 if (!silent)
2139 reiserfs_info(s,
2140 "converting 3.5 filesystem to the 3.6 format");
2141
2142 if (is_reiserfs_3_5(rs))
2143 /*
2144 * put magic string of 3.6 format.
2145 * 2.2 will not be able to
2146 * mount this filesystem anymore
2147 */
2148 memcpy(rs->s_v1.s_magic,
2149 reiserfs_3_6_magic_string,
2150 sizeof
2151 (reiserfs_3_6_magic_string));
2152
2153 set_sb_version(rs, REISERFS_VERSION_2);
2154 reiserfs_convert_objectid_map_v1(s);
2155 set_bit(REISERFS_3_6, &sbi->s_properties);
2156 clear_bit(REISERFS_3_5, &sbi->s_properties);
2157 } else if (!silent) {
2158 reiserfs_info(s, "using 3.5.x disk format\n");
2159 }
2160 } else
2161 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2162
2163
2164 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2165 errval = journal_end(&th);
2166 if (errval) {
2167 dput(s->s_root);
2168 s->s_root = NULL;
2169 goto error;
2170 }
2171
2172 reiserfs_write_unlock(s);
2173 if ((errval = reiserfs_lookup_privroot(s)) ||
2174 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2175 dput(s->s_root);
2176 s->s_root = NULL;
2177 goto error_unlocked;
2178 }
2179 reiserfs_write_lock(s);
2180
2181 /*
2182 * look for files which were to be removed in previous session
2183 */
2184 finish_unfinished(s);
2185 } else {
2186 if (old_format_only(s) && !silent) {
2187 reiserfs_info(s, "using 3.5.x disk format\n");
2188 }
2189
2190 reiserfs_write_unlock(s);
2191 if ((errval = reiserfs_lookup_privroot(s)) ||
2192 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2193 dput(s->s_root);
2194 s->s_root = NULL;
2195 goto error_unlocked;
2196 }
2197 reiserfs_write_lock(s);
2198 }
2199 /*
2200 * mark hash in super block: it could be unset. overwrite should be ok
2201 */
2202 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2203
2204 handle_attrs(s);
2205
2206 reiserfs_proc_info_init(s);
2207
2208 init_waitqueue_head(&(sbi->s_wait));
2209 spin_lock_init(&sbi->bitmap_lock);
2210
2211 reiserfs_write_unlock(s);
2212
2213 return (0);
2214
2215 error:
2216 reiserfs_write_unlock(s);
2217
2218 error_unlocked:
2219 /* kill the commit thread, free journal ram */
2220 if (jinit_done) {
2221 reiserfs_write_lock(s);
2222 journal_release_error(NULL, s);
2223 reiserfs_write_unlock(s);
2224 }
2225
2226 if (sbi->commit_wq)
2227 destroy_workqueue(sbi->commit_wq);
2228
2229 reiserfs_cancel_old_flush(s);
2230
2231 reiserfs_free_bitmap_cache(s);
2232 if (SB_BUFFER_WITH_SB(s))
2233 brelse(SB_BUFFER_WITH_SB(s));
2234 #ifdef CONFIG_QUOTA
2235 {
2236 int j;
2237 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2238 kfree(qf_names[j]);
2239 }
2240 #endif
2241 kfree(sbi->s_jdev);
2242 kfree(sbi);
2243
2244 s->s_fs_info = NULL;
2245 return errval;
2246 }
2247
2248 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2249 {
2250 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2251
2252 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2253 buf->f_bfree = sb_free_blocks(rs);
2254 buf->f_bavail = buf->f_bfree;
2255 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2256 buf->f_bsize = dentry->d_sb->s_blocksize;
2257 /* changed to accommodate gcc folks. */
2258 buf->f_type = REISERFS_SUPER_MAGIC;
2259 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2260 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2261 sizeof(rs->s_uuid)/2);
2262
2263 return 0;
2264 }
2265
2266 #ifdef CONFIG_QUOTA
2267 static int reiserfs_write_dquot(struct dquot *dquot)
2268 {
2269 struct reiserfs_transaction_handle th;
2270 int ret, err;
2271 int depth;
2272
2273 reiserfs_write_lock(dquot->dq_sb);
2274 ret =
2275 journal_begin(&th, dquot->dq_sb,
2276 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2277 if (ret)
2278 goto out;
2279 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2280 ret = dquot_commit(dquot);
2281 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2282 err = journal_end(&th);
2283 if (!ret && err)
2284 ret = err;
2285 out:
2286 reiserfs_write_unlock(dquot->dq_sb);
2287 return ret;
2288 }
2289
2290 static int reiserfs_acquire_dquot(struct dquot *dquot)
2291 {
2292 struct reiserfs_transaction_handle th;
2293 int ret, err;
2294 int depth;
2295
2296 reiserfs_write_lock(dquot->dq_sb);
2297 ret =
2298 journal_begin(&th, dquot->dq_sb,
2299 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2300 if (ret)
2301 goto out;
2302 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2303 ret = dquot_acquire(dquot);
2304 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2305 err = journal_end(&th);
2306 if (!ret && err)
2307 ret = err;
2308 out:
2309 reiserfs_write_unlock(dquot->dq_sb);
2310 return ret;
2311 }
2312
2313 static int reiserfs_release_dquot(struct dquot *dquot)
2314 {
2315 struct reiserfs_transaction_handle th;
2316 int ret, err;
2317
2318 reiserfs_write_lock(dquot->dq_sb);
2319 ret =
2320 journal_begin(&th, dquot->dq_sb,
2321 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2322 reiserfs_write_unlock(dquot->dq_sb);
2323 if (ret) {
2324 /* Release dquot anyway to avoid endless cycle in dqput() */
2325 dquot_release(dquot);
2326 goto out;
2327 }
2328 ret = dquot_release(dquot);
2329 reiserfs_write_lock(dquot->dq_sb);
2330 err = journal_end(&th);
2331 if (!ret && err)
2332 ret = err;
2333 reiserfs_write_unlock(dquot->dq_sb);
2334 out:
2335 return ret;
2336 }
2337
2338 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2339 {
2340 /* Are we journaling quotas? */
2341 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2342 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2343 dquot_mark_dquot_dirty(dquot);
2344 return reiserfs_write_dquot(dquot);
2345 } else
2346 return dquot_mark_dquot_dirty(dquot);
2347 }
2348
2349 static int reiserfs_write_info(struct super_block *sb, int type)
2350 {
2351 struct reiserfs_transaction_handle th;
2352 int ret, err;
2353 int depth;
2354
2355 /* Data block + inode block */
2356 reiserfs_write_lock(sb);
2357 ret = journal_begin(&th, sb, 2);
2358 if (ret)
2359 goto out;
2360 depth = reiserfs_write_unlock_nested(sb);
2361 ret = dquot_commit_info(sb, type);
2362 reiserfs_write_lock_nested(sb, depth);
2363 err = journal_end(&th);
2364 if (!ret && err)
2365 ret = err;
2366 out:
2367 reiserfs_write_unlock(sb);
2368 return ret;
2369 }
2370
2371 /*
2372 * Turn on quotas during mount time - we need to find the quota file and such...
2373 */
2374 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2375 {
2376 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2377 REISERFS_SB(sb)->s_jquota_fmt, type);
2378 }
2379
2380 /*
2381 * Standard function to be called on quota_on
2382 */
2383 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2384 const struct path *path)
2385 {
2386 int err;
2387 struct inode *inode;
2388 struct reiserfs_transaction_handle th;
2389 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2390
2391 reiserfs_write_lock(sb);
2392 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2393 err = -EINVAL;
2394 goto out;
2395 }
2396
2397 /* Quotafile not on the same filesystem? */
2398 if (path->dentry->d_sb != sb) {
2399 err = -EXDEV;
2400 goto out;
2401 }
2402 inode = d_inode(path->dentry);
2403 /*
2404 * We must not pack tails for quota files on reiserfs for quota
2405 * IO to work
2406 */
2407 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2408 err = reiserfs_unpack(inode);
2409 if (err) {
2410 reiserfs_warning(sb, "super-6520",
2411 "Unpacking tail of quota file failed"
2412 " (%d). Cannot turn on quotas.", err);
2413 err = -EINVAL;
2414 goto out;
2415 }
2416 mark_inode_dirty(inode);
2417 }
2418 /* Journaling quota? */
2419 if (REISERFS_SB(sb)->s_qf_names[type]) {
2420 /* Quotafile not of fs root? */
2421 if (path->dentry->d_parent != sb->s_root)
2422 reiserfs_warning(sb, "super-6521",
2423 "Quota file not on filesystem root. "
2424 "Journalled quota will not work.");
2425 }
2426
2427 /*
2428 * When we journal data on quota file, we have to flush journal to see
2429 * all updates to the file when we bypass pagecache...
2430 */
2431 if (reiserfs_file_data_log(inode)) {
2432 /* Just start temporary transaction and finish it */
2433 err = journal_begin(&th, sb, 1);
2434 if (err)
2435 goto out;
2436 err = journal_end_sync(&th);
2437 if (err)
2438 goto out;
2439 }
2440 reiserfs_write_unlock(sb);
2441 err = dquot_quota_on(sb, type, format_id, path);
2442 if (!err) {
2443 inode_lock(inode);
2444 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL |
2445 REISERFS_NOATIME_FL;
2446 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME,
2447 S_IMMUTABLE | S_NOATIME);
2448 inode_unlock(inode);
2449 mark_inode_dirty(inode);
2450 }
2451 return err;
2452 out:
2453 reiserfs_write_unlock(sb);
2454 return err;
2455 }
2456
2457 static int reiserfs_quota_off(struct super_block *sb, int type)
2458 {
2459 int err;
2460 struct inode *inode = sb_dqopt(sb)->files[type];
2461
2462 if (!inode || !igrab(inode))
2463 goto out;
2464
2465 err = dquot_quota_off(sb, type);
2466 if (err)
2467 goto out_put;
2468
2469 inode_lock(inode);
2470 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL |
2471 REISERFS_NOATIME_FL);
2472 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME);
2473 inode_unlock(inode);
2474 mark_inode_dirty(inode);
2475 out_put:
2476 iput(inode);
2477 return err;
2478 out:
2479 return dquot_quota_off(sb, type);
2480 }
2481
2482 /*
2483 * Read data from quotafile - avoid pagecache and such because we cannot afford
2484 * acquiring the locks... As quota files are never truncated and quota code
2485 * itself serializes the operations (and no one else should touch the files)
2486 * we don't have to be afraid of races
2487 */
2488 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2489 size_t len, loff_t off)
2490 {
2491 struct inode *inode = sb_dqopt(sb)->files[type];
2492 unsigned long blk = off >> sb->s_blocksize_bits;
2493 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2494 size_t toread;
2495 struct buffer_head tmp_bh, *bh;
2496 loff_t i_size = i_size_read(inode);
2497
2498 if (off > i_size)
2499 return 0;
2500 if (off + len > i_size)
2501 len = i_size - off;
2502 toread = len;
2503 while (toread > 0) {
2504 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2505 tmp_bh.b_state = 0;
2506 /*
2507 * Quota files are without tails so we can safely
2508 * use this function
2509 */
2510 reiserfs_write_lock(sb);
2511 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2512 reiserfs_write_unlock(sb);
2513 if (err)
2514 return err;
2515 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2516 memset(data, 0, tocopy);
2517 else {
2518 bh = sb_bread(sb, tmp_bh.b_blocknr);
2519 if (!bh)
2520 return -EIO;
2521 memcpy(data, bh->b_data + offset, tocopy);
2522 brelse(bh);
2523 }
2524 offset = 0;
2525 toread -= tocopy;
2526 data += tocopy;
2527 blk++;
2528 }
2529 return len;
2530 }
2531
2532 /*
2533 * Write to quotafile (we know the transaction is already started and has
2534 * enough credits)
2535 */
2536 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2537 const char *data, size_t len, loff_t off)
2538 {
2539 struct inode *inode = sb_dqopt(sb)->files[type];
2540 unsigned long blk = off >> sb->s_blocksize_bits;
2541 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2542 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2543 size_t towrite = len;
2544 struct buffer_head tmp_bh, *bh;
2545
2546 if (!current->journal_info) {
2547 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2548 (unsigned long long)off, (unsigned long long)len);
2549 return -EIO;
2550 }
2551 while (towrite > 0) {
2552 tocopy = min_t(unsigned long, sb->s_blocksize - offset, towrite);
2553 tmp_bh.b_state = 0;
2554 reiserfs_write_lock(sb);
2555 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2556 reiserfs_write_unlock(sb);
2557 if (err)
2558 goto out;
2559 if (offset || tocopy != sb->s_blocksize)
2560 bh = sb_bread(sb, tmp_bh.b_blocknr);
2561 else
2562 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2563 if (!bh) {
2564 err = -EIO;
2565 goto out;
2566 }
2567 lock_buffer(bh);
2568 memcpy(bh->b_data + offset, data, tocopy);
2569 flush_dcache_page(bh->b_page);
2570 set_buffer_uptodate(bh);
2571 unlock_buffer(bh);
2572 reiserfs_write_lock(sb);
2573 reiserfs_prepare_for_journal(sb, bh, 1);
2574 journal_mark_dirty(current->journal_info, bh);
2575 if (!journal_quota)
2576 reiserfs_add_ordered_list(inode, bh);
2577 reiserfs_write_unlock(sb);
2578 brelse(bh);
2579 offset = 0;
2580 towrite -= tocopy;
2581 data += tocopy;
2582 blk++;
2583 }
2584 out:
2585 if (len == towrite)
2586 return err;
2587 if (inode->i_size < off + len - towrite)
2588 i_size_write(inode, off + len - towrite);
2589 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
2590 mark_inode_dirty(inode);
2591 return len - towrite;
2592 }
2593
2594 #endif
2595
2596 static struct dentry *get_super_block(struct file_system_type *fs_type,
2597 int flags, const char *dev_name,
2598 void *data)
2599 {
2600 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2601 }
2602
2603 static int __init init_reiserfs_fs(void)
2604 {
2605 int ret;
2606
2607 ret = init_inodecache();
2608 if (ret)
2609 return ret;
2610
2611 reiserfs_proc_info_global_init();
2612
2613 ret = register_filesystem(&reiserfs_fs_type);
2614 if (ret)
2615 goto out;
2616
2617 return 0;
2618 out:
2619 reiserfs_proc_info_global_done();
2620 destroy_inodecache();
2621
2622 return ret;
2623 }
2624
2625 static void __exit exit_reiserfs_fs(void)
2626 {
2627 reiserfs_proc_info_global_done();
2628 unregister_filesystem(&reiserfs_fs_type);
2629 destroy_inodecache();
2630 }
2631
2632 struct file_system_type reiserfs_fs_type = {
2633 .owner = THIS_MODULE,
2634 .name = "reiserfs",
2635 .mount = get_super_block,
2636 .kill_sb = reiserfs_kill_sb,
2637 .fs_flags = FS_REQUIRES_DEV,
2638 };
2639 MODULE_ALIAS_FS("reiserfs");
2640
2641 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2642 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2643 MODULE_LICENSE("GPL");
2644
2645 module_init(init_reiserfs_fs);
2646 module_exit(exit_reiserfs_fs);
2647
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