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arm64: kgdb: Fix single-step exception handling oops
[linux/fpc-iii.git] / fs / reiserfs / super.c
blob677608a89b08d381ce8995ff209a015b0dd27c3a
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 spin_lock(&sbi->old_work_lock);
93 /* Avoid clobbering the cancel state... */
94 if (sbi->work_queued == 1)
95 sbi->work_queued = 0;
96 spin_unlock(&sbi->old_work_lock);
97
98 reiserfs_sync_fs(s, 1);
99 }
100
101 void reiserfs_schedule_old_flush(struct super_block *s)
102 {
103 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
104 unsigned long delay;
105
106 /*
107 * Avoid scheduling flush when sb is being shut down. It can race
108 * with journal shutdown and free still queued delayed work.
109 */
110 if (s->s_flags & MS_RDONLY || !(s->s_flags & MS_ACTIVE))
111 return;
112
113 spin_lock(&sbi->old_work_lock);
114 if (!sbi->work_queued) {
115 delay = msecs_to_jiffies(dirty_writeback_interval * 10);
116 queue_delayed_work(system_long_wq, &sbi->old_work, delay);
117 sbi->work_queued = 1;
118 }
119 spin_unlock(&sbi->old_work_lock);
120 }
121
122 void reiserfs_cancel_old_flush(struct super_block *s)
123 {
124 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
125
126 spin_lock(&sbi->old_work_lock);
127 /* Make sure no new flushes will be queued */
128 sbi->work_queued = 2;
129 spin_unlock(&sbi->old_work_lock);
130 cancel_delayed_work_sync(&REISERFS_SB(s)->old_work);
131 }
132
133 static int reiserfs_freeze(struct super_block *s)
134 {
135 struct reiserfs_transaction_handle th;
136
137 reiserfs_cancel_old_flush(s);
138
139 reiserfs_write_lock(s);
140 if (!(s->s_flags & MS_RDONLY)) {
141 int err = journal_begin(&th, s, 1);
142 if (err) {
143 reiserfs_block_writes(&th);
144 } else {
145 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
146 1);
147 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
148 reiserfs_block_writes(&th);
149 journal_end_sync(&th);
150 }
151 }
152 reiserfs_write_unlock(s);
153 return 0;
154 }
155
156 static int reiserfs_unfreeze(struct super_block *s)
157 {
158 struct reiserfs_sb_info *sbi = REISERFS_SB(s);
159
160 reiserfs_allow_writes(s);
161 spin_lock(&sbi->old_work_lock);
162 /* Allow old_work to run again */
163 sbi->work_queued = 0;
164 spin_unlock(&sbi->old_work_lock);
165 return 0;
166 }
167
168 extern const struct in_core_key MAX_IN_CORE_KEY;
169
170 /*
171 * this is used to delete "save link" when there are no items of a
172 * file it points to. It can either happen if unlink is completed but
173 * "save unlink" removal, or if file has both unlink and truncate
174 * pending and as unlink completes first (because key of "save link"
175 * protecting unlink is bigger that a key lf "save link" which
176 * protects truncate), so there left no items to make truncate
177 * completion on
178 */
179 static int remove_save_link_only(struct super_block *s,
180 struct reiserfs_key *key, int oid_free)
181 {
182 struct reiserfs_transaction_handle th;
183 int err;
184
185 /* we are going to do one balancing */
186 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
187 if (err)
188 return err;
189
190 reiserfs_delete_solid_item(&th, NULL, key);
191 if (oid_free)
192 /* removals are protected by direct items */
193 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
194
195 return journal_end(&th);
196 }
197
198 #ifdef CONFIG_QUOTA
199 static int reiserfs_quota_on_mount(struct super_block *, int);
200 #endif
201
202 /*
203 * Look for uncompleted unlinks and truncates and complete them
204 *
205 * Called with superblock write locked. If quotas are enabled, we have to
206 * release/retake lest we call dquot_quota_on_mount(), proceed to
207 * schedule_on_each_cpu() in invalidate_bdev() and deadlock waiting for the per
208 * cpu worklets to complete flush_async_commits() that in turn wait for the
209 * superblock write lock.
210 */
211 static int finish_unfinished(struct super_block *s)
212 {
213 INITIALIZE_PATH(path);
214 struct cpu_key max_cpu_key, obj_key;
215 struct reiserfs_key save_link_key, last_inode_key;
216 int retval = 0;
217 struct item_head *ih;
218 struct buffer_head *bh;
219 int item_pos;
220 char *item;
221 int done;
222 struct inode *inode;
223 int truncate;
224 #ifdef CONFIG_QUOTA
225 int i;
226 int ms_active_set;
227 int quota_enabled[REISERFS_MAXQUOTAS];
228 #endif
229
230 /* compose key to look for "save" links */
231 max_cpu_key.version = KEY_FORMAT_3_5;
232 max_cpu_key.on_disk_key.k_dir_id = ~0U;
233 max_cpu_key.on_disk_key.k_objectid = ~0U;
234 set_cpu_key_k_offset(&max_cpu_key, ~0U);
235 max_cpu_key.key_length = 3;
236
237 memset(&last_inode_key, 0, sizeof(last_inode_key));
238
239 #ifdef CONFIG_QUOTA
240 /* Needed for iput() to work correctly and not trash data */
241 if (s->s_flags & MS_ACTIVE) {
242 ms_active_set = 0;
243 } else {
244 ms_active_set = 1;
245 s->s_flags |= MS_ACTIVE;
246 }
247 /* Turn on quotas so that they are updated correctly */
248 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
249 quota_enabled[i] = 1;
250 if (REISERFS_SB(s)->s_qf_names[i]) {
251 int ret;
252
253 if (sb_has_quota_active(s, i)) {
254 quota_enabled[i] = 0;
255 continue;
256 }
257 reiserfs_write_unlock(s);
258 ret = reiserfs_quota_on_mount(s, i);
259 reiserfs_write_lock(s);
260 if (ret < 0)
261 reiserfs_warning(s, "reiserfs-2500",
262 "cannot turn on journaled "
263 "quota: error %d", ret);
264 }
265 }
266 #endif
267
268 done = 0;
269 REISERFS_SB(s)->s_is_unlinked_ok = 1;
270 while (!retval) {
271 int depth;
272 retval = search_item(s, &max_cpu_key, &path);
273 if (retval != ITEM_NOT_FOUND) {
274 reiserfs_error(s, "vs-2140",
275 "search_by_key returned %d", retval);
276 break;
277 }
278
279 bh = get_last_bh(&path);
280 item_pos = get_item_pos(&path);
281 if (item_pos != B_NR_ITEMS(bh)) {
282 reiserfs_warning(s, "vs-2060",
283 "wrong position found");
284 break;
285 }
286 item_pos--;
287 ih = item_head(bh, item_pos);
288
289 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
290 /* there are no "save" links anymore */
291 break;
292
293 save_link_key = ih->ih_key;
294 if (is_indirect_le_ih(ih))
295 truncate = 1;
296 else
297 truncate = 0;
298
299 /* reiserfs_iget needs k_dirid and k_objectid only */
300 item = ih_item_body(bh, ih);
301 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
302 obj_key.on_disk_key.k_objectid =
303 le32_to_cpu(ih->ih_key.k_objectid);
304 obj_key.on_disk_key.k_offset = 0;
305 obj_key.on_disk_key.k_type = 0;
306
307 pathrelse(&path);
308
309 inode = reiserfs_iget(s, &obj_key);
310 if (IS_ERR_OR_NULL(inode)) {
311 /*
312 * the unlink almost completed, it just did not
313 * manage to remove "save" link and release objectid
314 */
315 reiserfs_warning(s, "vs-2180", "iget failed for %K",
316 &obj_key);
317 retval = remove_save_link_only(s, &save_link_key, 1);
318 continue;
319 }
320
321 if (!truncate && inode->i_nlink) {
322 /* file is not unlinked */
323 reiserfs_warning(s, "vs-2185",
324 "file %K is not unlinked",
325 &obj_key);
326 retval = remove_save_link_only(s, &save_link_key, 0);
327 continue;
328 }
329 depth = reiserfs_write_unlock_nested(inode->i_sb);
330 dquot_initialize(inode);
331 reiserfs_write_lock_nested(inode->i_sb, depth);
332
333 if (truncate && S_ISDIR(inode->i_mode)) {
334 /*
335 * We got a truncate request for a dir which
336 * is impossible. The only imaginable way is to
337 * execute unfinished truncate request then boot
338 * into old kernel, remove the file and create dir
339 * with the same key.
340 */
341 reiserfs_warning(s, "green-2101",
342 "impossible truncate on a "
343 "directory %k. Please report",
344 INODE_PKEY(inode));
345 retval = remove_save_link_only(s, &save_link_key, 0);
346 truncate = 0;
347 iput(inode);
348 continue;
349 }
350
351 if (truncate) {
352 REISERFS_I(inode)->i_flags |=
353 i_link_saved_truncate_mask;
354 /*
355 * not completed truncate found. New size was
356 * committed together with "save" link
357 */
358 reiserfs_info(s, "Truncating %k to %lld ..",
359 INODE_PKEY(inode), inode->i_size);
360
361 /* don't update modification time */
362 reiserfs_truncate_file(inode, 0);
363
364 retval = remove_save_link(inode, truncate);
365 } else {
366 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
367 /* not completed unlink (rmdir) found */
368 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
369 if (memcmp(&last_inode_key, INODE_PKEY(inode),
370 sizeof(last_inode_key))){
371 last_inode_key = *INODE_PKEY(inode);
372 /* removal gets completed in iput */
373 retval = 0;
374 } else {
375 reiserfs_warning(s, "super-2189", "Dead loop "
376 "in finish_unfinished "
377 "detected, just remove "
378 "save link\n");
379 retval = remove_save_link_only(s,
380 &save_link_key, 0);
381 }
382 }
383
384 iput(inode);
385 printk("done\n");
386 done++;
387 }
388 REISERFS_SB(s)->s_is_unlinked_ok = 0;
389
390 #ifdef CONFIG_QUOTA
391 /* Turn quotas off */
392 reiserfs_write_unlock(s);
393 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
394 if (sb_dqopt(s)->files[i] && quota_enabled[i])
395 dquot_quota_off(s, i);
396 }
397 reiserfs_write_lock(s);
398 if (ms_active_set)
399 /* Restore the flag back */
400 s->s_flags &= ~MS_ACTIVE;
401 #endif
402 pathrelse(&path);
403 if (done)
404 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
405 "Completed\n", done);
406 return retval;
407 }
408
409 /*
410 * to protect file being unlinked from getting lost we "safe" link files
411 * being unlinked. This link will be deleted in the same transaction with last
412 * item of file. mounting the filesystem we scan all these links and remove
413 * files which almost got lost
414 */
415 void add_save_link(struct reiserfs_transaction_handle *th,
416 struct inode *inode, int truncate)
417 {
418 INITIALIZE_PATH(path);
419 int retval;
420 struct cpu_key key;
421 struct item_head ih;
422 __le32 link;
423
424 BUG_ON(!th->t_trans_id);
425
426 /* file can only get one "save link" of each kind */
427 RFALSE(truncate &&
428 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
429 "saved link already exists for truncated inode %lx",
430 (long)inode->i_ino);
431 RFALSE(!truncate &&
432 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
433 "saved link already exists for unlinked inode %lx",
434 (long)inode->i_ino);
435
436 /* setup key of "save" link */
437 key.version = KEY_FORMAT_3_5;
438 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
439 key.on_disk_key.k_objectid = inode->i_ino;
440 if (!truncate) {
441 /* unlink, rmdir, rename */
442 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
443 set_cpu_key_k_type(&key, TYPE_DIRECT);
444
445 /* item head of "safe" link */
446 make_le_item_head(&ih, &key, key.version,
447 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
448 4 /*length */ , 0xffff /*free space */ );
449 } else {
450 /* truncate */
451 if (S_ISDIR(inode->i_mode))
452 reiserfs_warning(inode->i_sb, "green-2102",
453 "Adding a truncate savelink for "
454 "a directory %k! Please report",
455 INODE_PKEY(inode));
456 set_cpu_key_k_offset(&key, 1);
457 set_cpu_key_k_type(&key, TYPE_INDIRECT);
458
459 /* item head of "safe" link */
460 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
461 4 /*length */ , 0 /*free space */ );
462 }
463 key.key_length = 3;
464
465 /* look for its place in the tree */
466 retval = search_item(inode->i_sb, &key, &path);
467 if (retval != ITEM_NOT_FOUND) {
468 if (retval != -ENOSPC)
469 reiserfs_error(inode->i_sb, "vs-2100",
470 "search_by_key (%K) returned %d", &key,
471 retval);
472 pathrelse(&path);
473 return;
474 }
475
476 /* body of "save" link */
477 link = INODE_PKEY(inode)->k_dir_id;
478
479 /* put "save" link into tree, don't charge quota to anyone */
480 retval =
481 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
482 if (retval) {
483 if (retval != -ENOSPC)
484 reiserfs_error(inode->i_sb, "vs-2120",
485 "insert_item returned %d", retval);
486 } else {
487 if (truncate)
488 REISERFS_I(inode)->i_flags |=
489 i_link_saved_truncate_mask;
490 else
491 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
492 }
493 }
494
495 /* this opens transaction unlike add_save_link */
496 int remove_save_link(struct inode *inode, int truncate)
497 {
498 struct reiserfs_transaction_handle th;
499 struct reiserfs_key key;
500 int err;
501
502 /* we are going to do one balancing only */
503 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
504 if (err)
505 return err;
506
507 /* setup key of "save" link */
508 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
509 key.k_objectid = INODE_PKEY(inode)->k_objectid;
510 if (!truncate) {
511 /* unlink, rmdir, rename */
512 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
513 1 + inode->i_sb->s_blocksize);
514 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
515 } else {
516 /* truncate */
517 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
518 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
519 }
520
521 if ((truncate &&
522 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
523 (!truncate &&
524 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
525 /* don't take quota bytes from anywhere */
526 reiserfs_delete_solid_item(&th, NULL, &key);
527 if (!truncate) {
528 reiserfs_release_objectid(&th, inode->i_ino);
529 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
530 } else
531 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
532
533 return journal_end(&th);
534 }
535
536 static void reiserfs_kill_sb(struct super_block *s)
537 {
538 if (REISERFS_SB(s)) {
539 reiserfs_proc_info_done(s);
540 /*
541 * Force any pending inode evictions to occur now. Any
542 * inodes to be removed that have extended attributes
543 * associated with them need to clean them up before
544 * we can release the extended attribute root dentries.
545 * shrink_dcache_for_umount will BUG if we don't release
546 * those before it's called so ->put_super is too late.
547 */
548 shrink_dcache_sb(s);
549
550 dput(REISERFS_SB(s)->xattr_root);
551 REISERFS_SB(s)->xattr_root = NULL;
552 dput(REISERFS_SB(s)->priv_root);
553 REISERFS_SB(s)->priv_root = NULL;
554 }
555
556 kill_block_super(s);
557 }
558
559 static void reiserfs_put_super(struct super_block *s)
560 {
561 struct reiserfs_transaction_handle th;
562 th.t_trans_id = 0;
563
564 dquot_disable(s, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
565
566 reiserfs_write_lock(s);
567
568 /*
569 * change file system state to current state if it was mounted
570 * with read-write permissions
571 */
572 if (!(s->s_flags & MS_RDONLY)) {
573 if (!journal_begin(&th, s, 10)) {
574 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
575 1);
576 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
577 REISERFS_SB(s)->s_mount_state);
578 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
579 }
580 }
581
582 /*
583 * note, journal_release checks for readonly mount, and can
584 * decide not to do a journal_end
585 */
586 journal_release(&th, s);
587
588 reiserfs_free_bitmap_cache(s);
589
590 brelse(SB_BUFFER_WITH_SB(s));
591
592 print_statistics(s);
593
594 if (REISERFS_SB(s)->reserved_blocks != 0) {
595 reiserfs_warning(s, "green-2005", "reserved blocks left %d",
596 REISERFS_SB(s)->reserved_blocks);
597 }
598
599 reiserfs_write_unlock(s);
600 mutex_destroy(&REISERFS_SB(s)->lock);
601 destroy_workqueue(REISERFS_SB(s)->commit_wq);
602 kfree(REISERFS_SB(s)->s_jdev);
603 kfree(s->s_fs_info);
604 s->s_fs_info = NULL;
605 }
606
607 static struct kmem_cache *reiserfs_inode_cachep;
608
609 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
610 {
611 struct reiserfs_inode_info *ei;
612 ei = kmem_cache_alloc(reiserfs_inode_cachep, GFP_KERNEL);
613 if (!ei)
614 return NULL;
615 atomic_set(&ei->openers, 0);
616 mutex_init(&ei->tailpack);
617 #ifdef CONFIG_QUOTA
618 memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
619 #endif
620
621 return &ei->vfs_inode;
622 }
623
624 static void reiserfs_i_callback(struct rcu_head *head)
625 {
626 struct inode *inode = container_of(head, struct inode, i_rcu);
627 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
628 }
629
630 static void reiserfs_destroy_inode(struct inode *inode)
631 {
632 call_rcu(&inode->i_rcu, reiserfs_i_callback);
633 }
634
635 static void init_once(void *foo)
636 {
637 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
638
639 INIT_LIST_HEAD(&ei->i_prealloc_list);
640 inode_init_once(&ei->vfs_inode);
641 }
642
643 static int __init init_inodecache(void)
644 {
645 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
646 sizeof(struct
647 reiserfs_inode_info),
648 0, (SLAB_RECLAIM_ACCOUNT|
649 SLAB_MEM_SPREAD|
650 SLAB_ACCOUNT),
651 init_once);
652 if (reiserfs_inode_cachep == NULL)
653 return -ENOMEM;
654 return 0;
655 }
656
657 static void destroy_inodecache(void)
658 {
659 /*
660 * Make sure all delayed rcu free inodes are flushed before we
661 * destroy cache.
662 */
663 rcu_barrier();
664 kmem_cache_destroy(reiserfs_inode_cachep);
665 }
666
667 /* we don't mark inodes dirty, we just log them */
668 static void reiserfs_dirty_inode(struct inode *inode, int flags)
669 {
670 struct reiserfs_transaction_handle th;
671
672 int err = 0;
673
674 if (inode->i_sb->s_flags & MS_RDONLY) {
675 reiserfs_warning(inode->i_sb, "clm-6006",
676 "writing inode %lu on readonly FS",
677 inode->i_ino);
678 return;
679 }
680 reiserfs_write_lock(inode->i_sb);
681
682 /*
683 * this is really only used for atime updates, so they don't have
684 * to be included in O_SYNC or fsync
685 */
686 err = journal_begin(&th, inode->i_sb, 1);
687 if (err)
688 goto out;
689
690 reiserfs_update_sd(&th, inode);
691 journal_end(&th);
692
693 out:
694 reiserfs_write_unlock(inode->i_sb);
695 }
696
697 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
698 {
699 struct super_block *s = root->d_sb;
700 struct reiserfs_journal *journal = SB_JOURNAL(s);
701 long opts = REISERFS_SB(s)->s_mount_opt;
702
703 if (opts & (1 << REISERFS_LARGETAIL))
704 seq_puts(seq, ",tails=on");
705 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
706 seq_puts(seq, ",notail");
707 /* tails=small is default so we don't show it */
708
709 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
710 seq_puts(seq, ",barrier=none");
711 /* barrier=flush is default so we don't show it */
712
713 if (opts & (1 << REISERFS_ERROR_CONTINUE))
714 seq_puts(seq, ",errors=continue");
715 else if (opts & (1 << REISERFS_ERROR_PANIC))
716 seq_puts(seq, ",errors=panic");
717 /* errors=ro is default so we don't show it */
718
719 if (opts & (1 << REISERFS_DATA_LOG))
720 seq_puts(seq, ",data=journal");
721 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
722 seq_puts(seq, ",data=writeback");
723 /* data=ordered is default so we don't show it */
724
725 if (opts & (1 << REISERFS_ATTRS))
726 seq_puts(seq, ",attrs");
727
728 if (opts & (1 << REISERFS_XATTRS_USER))
729 seq_puts(seq, ",user_xattr");
730
731 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
732 seq_puts(seq, ",expose_privroot");
733
734 if (opts & (1 << REISERFS_POSIXACL))
735 seq_puts(seq, ",acl");
736
737 if (REISERFS_SB(s)->s_jdev)
738 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
739
740 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
741 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
742
743 #ifdef CONFIG_QUOTA
744 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
745 seq_show_option(seq, "usrjquota",
746 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
747 else if (opts & (1 << REISERFS_USRQUOTA))
748 seq_puts(seq, ",usrquota");
749 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
750 seq_show_option(seq, "grpjquota",
751 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
752 else if (opts & (1 << REISERFS_GRPQUOTA))
753 seq_puts(seq, ",grpquota");
754 if (REISERFS_SB(s)->s_jquota_fmt) {
755 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
756 seq_puts(seq, ",jqfmt=vfsold");
757 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
758 seq_puts(seq, ",jqfmt=vfsv0");
759 }
760 #endif
761
762 /* Block allocator options */
763 if (opts & (1 << REISERFS_NO_BORDER))
764 seq_puts(seq, ",block-allocator=noborder");
765 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
766 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
767 if (opts & (1 << REISERFS_HASHED_RELOCATION))
768 seq_puts(seq, ",block-allocator=hashed_relocation");
769 if (opts & (1 << REISERFS_TEST4))
770 seq_puts(seq, ",block-allocator=test4");
771 show_alloc_options(seq, s);
772 return 0;
773 }
774
775 #ifdef CONFIG_QUOTA
776 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
777 size_t, loff_t);
778 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
779 loff_t);
780
781 static struct dquot **reiserfs_get_dquots(struct inode *inode)
782 {
783 return REISERFS_I(inode)->i_dquot;
784 }
785 #endif
786
787 static const struct super_operations reiserfs_sops = {
788 .alloc_inode = reiserfs_alloc_inode,
789 .destroy_inode = reiserfs_destroy_inode,
790 .write_inode = reiserfs_write_inode,
791 .dirty_inode = reiserfs_dirty_inode,
792 .evict_inode = reiserfs_evict_inode,
793 .put_super = reiserfs_put_super,
794 .sync_fs = reiserfs_sync_fs,
795 .freeze_fs = reiserfs_freeze,
796 .unfreeze_fs = reiserfs_unfreeze,
797 .statfs = reiserfs_statfs,
798 .remount_fs = reiserfs_remount,
799 .show_options = reiserfs_show_options,
800 #ifdef CONFIG_QUOTA
801 .quota_read = reiserfs_quota_read,
802 .quota_write = reiserfs_quota_write,
803 .get_dquots = reiserfs_get_dquots,
804 #endif
805 };
806
807 #ifdef CONFIG_QUOTA
808 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
809
810 static int reiserfs_write_dquot(struct dquot *);
811 static int reiserfs_acquire_dquot(struct dquot *);
812 static int reiserfs_release_dquot(struct dquot *);
813 static int reiserfs_mark_dquot_dirty(struct dquot *);
814 static int reiserfs_write_info(struct super_block *, int);
815 static int reiserfs_quota_on(struct super_block *, int, int, struct path *);
816
817 static const struct dquot_operations reiserfs_quota_operations = {
818 .write_dquot = reiserfs_write_dquot,
819 .acquire_dquot = reiserfs_acquire_dquot,
820 .release_dquot = reiserfs_release_dquot,
821 .mark_dirty = reiserfs_mark_dquot_dirty,
822 .write_info = reiserfs_write_info,
823 .alloc_dquot = dquot_alloc,
824 .destroy_dquot = dquot_destroy,
825 .get_next_id = dquot_get_next_id,
826 };
827
828 static const struct quotactl_ops reiserfs_qctl_operations = {
829 .quota_on = reiserfs_quota_on,
830 .quota_off = dquot_quota_off,
831 .quota_sync = dquot_quota_sync,
832 .get_state = dquot_get_state,
833 .set_info = dquot_set_dqinfo,
834 .get_dqblk = dquot_get_dqblk,
835 .set_dqblk = dquot_set_dqblk,
836 };
837 #endif
838
839 static const struct export_operations reiserfs_export_ops = {
840 .encode_fh = reiserfs_encode_fh,
841 .fh_to_dentry = reiserfs_fh_to_dentry,
842 .fh_to_parent = reiserfs_fh_to_parent,
843 .get_parent = reiserfs_get_parent,
844 };
845
846 /*
847 * this struct is used in reiserfs_getopt () for containing the value for
848 * those mount options that have values rather than being toggles.
849 */
850 typedef struct {
851 char *value;
852 /*
853 * bitmask which is to set on mount_options bitmask
854 * when this value is found, 0 is no bits are to be changed.
855 */
856 int setmask;
857 /*
858 * bitmask which is to clear on mount_options bitmask
859 * when this value is found, 0 is no bits are to be changed.
860 * This is applied BEFORE setmask
861 */
862 int clrmask;
863 } arg_desc_t;
864
865 /* Set this bit in arg_required to allow empty arguments */
866 #define REISERFS_OPT_ALLOWEMPTY 31
867
868 /*
869 * this struct is used in reiserfs_getopt() for describing the
870 * set of reiserfs mount options
871 */
872 typedef struct {
873 char *option_name;
874
875 /* 0 if argument is not required, not 0 otherwise */
876 int arg_required;
877
878 /* list of values accepted by an option */
879 const arg_desc_t *values;
880
881 /*
882 * bitmask which is to set on mount_options bitmask
883 * when this value is found, 0 is no bits are to be changed.
884 */
885 int setmask;
886
887 /*
888 * bitmask which is to clear on mount_options bitmask
889 * when this value is found, 0 is no bits are to be changed.
890 * This is applied BEFORE setmask
891 */
892 int clrmask;
893 } opt_desc_t;
894
895 /* possible values for -o data= */
896 static const arg_desc_t logging_mode[] = {
897 {"ordered", 1 << REISERFS_DATA_ORDERED,
898 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
899 {"journal", 1 << REISERFS_DATA_LOG,
900 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
901 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
902 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
903 {.value = NULL}
904 };
905
906 /* possible values for -o barrier= */
907 static const arg_desc_t barrier_mode[] = {
908 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
909 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
910 {.value = NULL}
911 };
912
913 /*
914 * possible values for "-o block-allocator=" and bits which are to be set in
915 * s_mount_opt of reiserfs specific part of in-core super block
916 */
917 static const arg_desc_t balloc[] = {
918 {"noborder", 1 << REISERFS_NO_BORDER, 0},
919 {"border", 0, 1 << REISERFS_NO_BORDER},
920 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
921 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
922 {"test4", 1 << REISERFS_TEST4, 0},
923 {"notest4", 0, 1 << REISERFS_TEST4},
924 {NULL, 0, 0}
925 };
926
927 static const arg_desc_t tails[] = {
928 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
929 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
930 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
931 {NULL, 0, 0}
932 };
933
934 static const arg_desc_t error_actions[] = {
935 {"panic", 1 << REISERFS_ERROR_PANIC,
936 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
937 {"ro-remount", 1 << REISERFS_ERROR_RO,
938 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
939 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
940 {"continue", 1 << REISERFS_ERROR_CONTINUE,
941 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
942 #endif
943 {NULL, 0, 0},
944 };
945
946 /*
947 * proceed only one option from a list *cur - string containing of mount
948 * options
949 * opts - array of options which are accepted
950 * opt_arg - if option is found and requires an argument and if it is specifed
951 * in the input - pointer to the argument is stored here
952 * bit_flags - if option requires to set a certain bit - it is set here
953 * return -1 if unknown option is found, opt->arg_required otherwise
954 */
955 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
956 char **opt_arg, unsigned long *bit_flags)
957 {
958 char *p;
959 /*
960 * foo=bar,
961 * ^ ^ ^
962 * | | +-- option_end
963 * | +-- arg_start
964 * +-- option_start
965 */
966 const opt_desc_t *opt;
967 const arg_desc_t *arg;
968
969 p = *cur;
970
971 /* assume argument cannot contain commas */
972 *cur = strchr(p, ',');
973 if (*cur) {
974 *(*cur) = '\0';
975 (*cur)++;
976 }
977
978 if (!strncmp(p, "alloc=", 6)) {
979 /*
980 * Ugly special case, probably we should redo options
981 * parser so that it can understand several arguments for
982 * some options, also so that it can fill several bitfields
983 * with option values.
984 */
985 if (reiserfs_parse_alloc_options(s, p + 6)) {
986 return -1;
987 } else {
988 return 0;
989 }
990 }
991
992 /* for every option in the list */
993 for (opt = opts; opt->option_name; opt++) {
994 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
995 if (bit_flags) {
996 if (opt->clrmask ==
997 (1 << REISERFS_UNSUPPORTED_OPT))
998 reiserfs_warning(s, "super-6500",
999 "%s not supported.\n",
1000 p);
1001 else
1002 *bit_flags &= ~opt->clrmask;
1003 if (opt->setmask ==
1004 (1 << REISERFS_UNSUPPORTED_OPT))
1005 reiserfs_warning(s, "super-6501",
1006 "%s not supported.\n",
1007 p);
1008 else
1009 *bit_flags |= opt->setmask;
1010 }
1011 break;
1012 }
1013 }
1014 if (!opt->option_name) {
1015 reiserfs_warning(s, "super-6502",
1016 "unknown mount option \"%s\"", p);
1017 return -1;
1018 }
1019
1020 p += strlen(opt->option_name);
1021 switch (*p) {
1022 case '=':
1023 if (!opt->arg_required) {
1024 reiserfs_warning(s, "super-6503",
1025 "the option \"%s\" does not "
1026 "require an argument\n",
1027 opt->option_name);
1028 return -1;
1029 }
1030 break;
1031
1032 case 0:
1033 if (opt->arg_required) {
1034 reiserfs_warning(s, "super-6504",
1035 "the option \"%s\" requires an "
1036 "argument\n", opt->option_name);
1037 return -1;
1038 }
1039 break;
1040 default:
1041 reiserfs_warning(s, "super-6505",
1042 "head of option \"%s\" is only correct\n",
1043 opt->option_name);
1044 return -1;
1045 }
1046
1047 /*
1048 * move to the argument, or to next option if argument is not
1049 * required
1050 */
1051 p++;
1052
1053 if (opt->arg_required
1054 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1055 && !strlen(p)) {
1056 /* this catches "option=," if not allowed */
1057 reiserfs_warning(s, "super-6506",
1058 "empty argument for \"%s\"\n",
1059 opt->option_name);
1060 return -1;
1061 }
1062
1063 if (!opt->values) {
1064 /* *=NULLopt_arg contains pointer to argument */
1065 *opt_arg = p;
1066 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1067 }
1068
1069 /* values possible for this option are listed in opt->values */
1070 for (arg = opt->values; arg->value; arg++) {
1071 if (!strcmp(p, arg->value)) {
1072 if (bit_flags) {
1073 *bit_flags &= ~arg->clrmask;
1074 *bit_flags |= arg->setmask;
1075 }
1076 return opt->arg_required;
1077 }
1078 }
1079
1080 reiserfs_warning(s, "super-6506",
1081 "bad value \"%s\" for option \"%s\"\n", p,
1082 opt->option_name);
1083 return -1;
1084 }
1085
1086 /* returns 0 if something is wrong in option string, 1 - otherwise */
1087 static int reiserfs_parse_options(struct super_block *s,
1088
1089 /* string given via mount's -o */
1090 char *options,
1091
1092 /*
1093 * after the parsing phase, contains the
1094 * collection of bitflags defining what
1095 * mount options were selected.
1096 */
1097 unsigned long *mount_options,
1098
1099 /* strtol-ed from NNN of resize=NNN */
1100 unsigned long *blocks,
1101 char **jdev_name,
1102 unsigned int *commit_max_age,
1103 char **qf_names,
1104 unsigned int *qfmt)
1105 {
1106 int c;
1107 char *arg = NULL;
1108 char *pos;
1109 opt_desc_t opts[] = {
1110 /*
1111 * Compatibility stuff, so that -o notail for old
1112 * setups still work
1113 */
1114 {"tails",.arg_required = 't',.values = tails},
1115 {"notail",.clrmask =
1116 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1117 {"conv",.setmask = 1 << REISERFS_CONVERT},
1118 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1119 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1120 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1121 #ifdef CONFIG_REISERFS_FS_XATTR
1122 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1123 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1124 #else
1125 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1126 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1127 #endif
1128 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1129 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1130 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1131 #else
1132 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1133 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1134 #endif
1135 {.option_name = "nolog"},
1136 {"replayonly",.setmask = 1 << REPLAYONLY},
1137 {"block-allocator",.arg_required = 'a',.values = balloc},
1138 {"data",.arg_required = 'd',.values = logging_mode},
1139 {"barrier",.arg_required = 'b',.values = barrier_mode},
1140 {"resize",.arg_required = 'r',.values = NULL},
1141 {"jdev",.arg_required = 'j',.values = NULL},
1142 {"nolargeio",.arg_required = 'w',.values = NULL},
1143 {"commit",.arg_required = 'c',.values = NULL},
1144 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1145 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1146 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1147 {"errors",.arg_required = 'e',.values = error_actions},
1148 {"usrjquota",.arg_required =
1149 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1150 {"grpjquota",.arg_required =
1151 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1152 {"jqfmt",.arg_required = 'f',.values = NULL},
1153 {.option_name = NULL}
1154 };
1155
1156 *blocks = 0;
1157 if (!options || !*options)
1158 /*
1159 * use default configuration: create tails, journaling on, no
1160 * conversion to newest format
1161 */
1162 return 1;
1163
1164 for (pos = options; pos;) {
1165 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1166 if (c == -1)
1167 /* wrong option is given */
1168 return 0;
1169
1170 if (c == 'r') {
1171 char *p;
1172
1173 p = NULL;
1174 /* "resize=NNN" or "resize=auto" */
1175
1176 if (!strcmp(arg, "auto")) {
1177 /* From JFS code, to auto-get the size. */
1178 *blocks =
1179 s->s_bdev->bd_inode->i_size >> s->
1180 s_blocksize_bits;
1181 } else {
1182 *blocks = simple_strtoul(arg, &p, 0);
1183 if (*p != '\0') {
1184 /* NNN does not look like a number */
1185 reiserfs_warning(s, "super-6507",
1186 "bad value %s for "
1187 "-oresize\n", arg);
1188 return 0;
1189 }
1190 }
1191 }
1192
1193 if (c == 'c') {
1194 char *p = NULL;
1195 unsigned long val = simple_strtoul(arg, &p, 0);
1196 /* commit=NNN (time in seconds) */
1197 if (*p != '\0' || val >= (unsigned int)-1) {
1198 reiserfs_warning(s, "super-6508",
1199 "bad value %s for -ocommit\n",
1200 arg);
1201 return 0;
1202 }
1203 *commit_max_age = (unsigned int)val;
1204 }
1205
1206 if (c == 'w') {
1207 reiserfs_warning(s, "super-6509", "nolargeio option "
1208 "is no longer supported");
1209 return 0;
1210 }
1211
1212 if (c == 'j') {
1213 if (arg && *arg && jdev_name) {
1214 /* Hm, already assigned? */
1215 if (*jdev_name) {
1216 reiserfs_warning(s, "super-6510",
1217 "journal device was "
1218 "already specified to "
1219 "be %s", *jdev_name);
1220 return 0;
1221 }
1222 *jdev_name = arg;
1223 }
1224 }
1225 #ifdef CONFIG_QUOTA
1226 if (c == 'u' || c == 'g') {
1227 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1228
1229 if (sb_any_quota_loaded(s) &&
1230 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1231 reiserfs_warning(s, "super-6511",
1232 "cannot change journaled "
1233 "quota options when quota "
1234 "turned on.");
1235 return 0;
1236 }
1237 if (*arg) { /* Some filename specified? */
1238 if (REISERFS_SB(s)->s_qf_names[qtype]
1239 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1240 arg)) {
1241 reiserfs_warning(s, "super-6512",
1242 "%s quota file "
1243 "already specified.",
1244 QTYPE2NAME(qtype));
1245 return 0;
1246 }
1247 if (strchr(arg, '/')) {
1248 reiserfs_warning(s, "super-6513",
1249 "quotafile must be "
1250 "on filesystem root.");
1251 return 0;
1252 }
1253 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1254 if (!qf_names[qtype]) {
1255 reiserfs_warning(s, "reiserfs-2502",
1256 "not enough memory "
1257 "for storing "
1258 "quotafile name.");
1259 return 0;
1260 }
1261 if (qtype == USRQUOTA)
1262 *mount_options |= 1 << REISERFS_USRQUOTA;
1263 else
1264 *mount_options |= 1 << REISERFS_GRPQUOTA;
1265 } else {
1266 if (qf_names[qtype] !=
1267 REISERFS_SB(s)->s_qf_names[qtype])
1268 kfree(qf_names[qtype]);
1269 qf_names[qtype] = NULL;
1270 if (qtype == USRQUOTA)
1271 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1272 else
1273 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1274 }
1275 }
1276 if (c == 'f') {
1277 if (!strcmp(arg, "vfsold"))
1278 *qfmt = QFMT_VFS_OLD;
1279 else if (!strcmp(arg, "vfsv0"))
1280 *qfmt = QFMT_VFS_V0;
1281 else {
1282 reiserfs_warning(s, "super-6514",
1283 "unknown quota format "
1284 "specified.");
1285 return 0;
1286 }
1287 if (sb_any_quota_loaded(s) &&
1288 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1289 reiserfs_warning(s, "super-6515",
1290 "cannot change journaled "
1291 "quota options when quota "
1292 "turned on.");
1293 return 0;
1294 }
1295 }
1296 #else
1297 if (c == 'u' || c == 'g' || c == 'f') {
1298 reiserfs_warning(s, "reiserfs-2503", "journaled "
1299 "quota options not supported.");
1300 return 0;
1301 }
1302 #endif
1303 }
1304
1305 #ifdef CONFIG_QUOTA
1306 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1307 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1308 reiserfs_warning(s, "super-6515",
1309 "journaled quota format not specified.");
1310 return 0;
1311 }
1312 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1313 sb_has_quota_loaded(s, USRQUOTA)) ||
1314 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1315 sb_has_quota_loaded(s, GRPQUOTA))) {
1316 reiserfs_warning(s, "super-6516", "quota options must "
1317 "be present when quota is turned on.");
1318 return 0;
1319 }
1320 #endif
1321
1322 return 1;
1323 }
1324
1325 static void switch_data_mode(struct super_block *s, unsigned long mode)
1326 {
1327 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1328 (1 << REISERFS_DATA_ORDERED) |
1329 (1 << REISERFS_DATA_WRITEBACK));
1330 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1331 }
1332
1333 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1334 {
1335 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1336 if (!reiserfs_data_log(s)) {
1337 switch_data_mode(s, REISERFS_DATA_LOG);
1338 reiserfs_info(s, "switching to journaled data mode\n");
1339 }
1340 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1341 if (!reiserfs_data_ordered(s)) {
1342 switch_data_mode(s, REISERFS_DATA_ORDERED);
1343 reiserfs_info(s, "switching to ordered data mode\n");
1344 }
1345 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1346 if (!reiserfs_data_writeback(s)) {
1347 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1348 reiserfs_info(s, "switching to writeback data mode\n");
1349 }
1350 }
1351 }
1352
1353 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1354 {
1355 int flush = (1 << REISERFS_BARRIER_FLUSH);
1356 int none = (1 << REISERFS_BARRIER_NONE);
1357 int all_barrier = flush | none;
1358
1359 if (bits & all_barrier) {
1360 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1361 if (bits & flush) {
1362 REISERFS_SB(s)->s_mount_opt |= flush;
1363 printk("reiserfs: enabling write barrier flush mode\n");
1364 } else if (bits & none) {
1365 REISERFS_SB(s)->s_mount_opt |= none;
1366 printk("reiserfs: write barriers turned off\n");
1367 }
1368 }
1369 }
1370
1371 static void handle_attrs(struct super_block *s)
1372 {
1373 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1374
1375 if (reiserfs_attrs(s)) {
1376 if (old_format_only(s)) {
1377 reiserfs_warning(s, "super-6517", "cannot support "
1378 "attributes on 3.5.x disk format");
1379 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1380 return;
1381 }
1382 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1383 reiserfs_warning(s, "super-6518", "cannot support "
1384 "attributes until flag is set in "
1385 "super-block");
1386 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1387 }
1388 }
1389 }
1390
1391 #ifdef CONFIG_QUOTA
1392 static void handle_quota_files(struct super_block *s, char **qf_names,
1393 unsigned int *qfmt)
1394 {
1395 int i;
1396
1397 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1398 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1399 kfree(REISERFS_SB(s)->s_qf_names[i]);
1400 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1401 }
1402 if (*qfmt)
1403 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1404 }
1405 #endif
1406
1407 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1408 {
1409 struct reiserfs_super_block *rs;
1410 struct reiserfs_transaction_handle th;
1411 unsigned long blocks;
1412 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1413 unsigned long safe_mask = 0;
1414 unsigned int commit_max_age = (unsigned int)-1;
1415 struct reiserfs_journal *journal = SB_JOURNAL(s);
1416 char *new_opts;
1417 int err;
1418 char *qf_names[REISERFS_MAXQUOTAS];
1419 unsigned int qfmt = 0;
1420 #ifdef CONFIG_QUOTA
1421 int i;
1422 #endif
1423
1424 new_opts = kstrdup(arg, GFP_KERNEL);
1425 if (arg && !new_opts)
1426 return -ENOMEM;
1427
1428 sync_filesystem(s);
1429 reiserfs_write_lock(s);
1430
1431 #ifdef CONFIG_QUOTA
1432 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1433 #endif
1434
1435 rs = SB_DISK_SUPER_BLOCK(s);
1436
1437 if (!reiserfs_parse_options
1438 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1439 qf_names, &qfmt)) {
1440 #ifdef CONFIG_QUOTA
1441 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1442 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1443 kfree(qf_names[i]);
1444 #endif
1445 err = -EINVAL;
1446 goto out_err_unlock;
1447 }
1448 #ifdef CONFIG_QUOTA
1449 handle_quota_files(s, qf_names, &qfmt);
1450 #endif
1451
1452 handle_attrs(s);
1453
1454 /* Add options that are safe here */
1455 safe_mask |= 1 << REISERFS_SMALLTAIL;
1456 safe_mask |= 1 << REISERFS_LARGETAIL;
1457 safe_mask |= 1 << REISERFS_NO_BORDER;
1458 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1459 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1460 safe_mask |= 1 << REISERFS_TEST4;
1461 safe_mask |= 1 << REISERFS_ATTRS;
1462 safe_mask |= 1 << REISERFS_XATTRS_USER;
1463 safe_mask |= 1 << REISERFS_POSIXACL;
1464 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1465 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1466 safe_mask |= 1 << REISERFS_ERROR_RO;
1467 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1468 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1469 safe_mask |= 1 << REISERFS_USRQUOTA;
1470 safe_mask |= 1 << REISERFS_GRPQUOTA;
1471
1472 /*
1473 * Update the bitmask, taking care to keep
1474 * the bits we're not allowed to change here
1475 */
1476 REISERFS_SB(s)->s_mount_opt =
1477 (REISERFS_SB(s)->
1478 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1479
1480 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1481 journal->j_max_commit_age = commit_max_age;
1482 journal->j_max_trans_age = commit_max_age;
1483 } else if (commit_max_age == 0) {
1484 /* 0 means restore defaults. */
1485 journal->j_max_commit_age = journal->j_default_max_commit_age;
1486 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1487 }
1488
1489 if (blocks) {
1490 err = reiserfs_resize(s, blocks);
1491 if (err != 0)
1492 goto out_err_unlock;
1493 }
1494
1495 if (*mount_flags & MS_RDONLY) {
1496 reiserfs_write_unlock(s);
1497 reiserfs_xattr_init(s, *mount_flags);
1498 /* remount read-only */
1499 if (s->s_flags & MS_RDONLY)
1500 /* it is read-only already */
1501 goto out_ok_unlocked;
1502
1503 err = dquot_suspend(s, -1);
1504 if (err < 0)
1505 goto out_err;
1506
1507 /* try to remount file system with read-only permissions */
1508 if (sb_umount_state(rs) == REISERFS_VALID_FS
1509 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1510 goto out_ok_unlocked;
1511 }
1512
1513 reiserfs_write_lock(s);
1514
1515 err = journal_begin(&th, s, 10);
1516 if (err)
1517 goto out_err_unlock;
1518
1519 /* Mounting a rw partition read-only. */
1520 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1521 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1522 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1523 } else {
1524 /* remount read-write */
1525 if (!(s->s_flags & MS_RDONLY)) {
1526 reiserfs_write_unlock(s);
1527 reiserfs_xattr_init(s, *mount_flags);
1528 goto out_ok_unlocked; /* We are read-write already */
1529 }
1530
1531 if (reiserfs_is_journal_aborted(journal)) {
1532 err = journal->j_errno;
1533 goto out_err_unlock;
1534 }
1535
1536 handle_data_mode(s, mount_options);
1537 handle_barrier_mode(s, mount_options);
1538 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1539
1540 /* now it is safe to call journal_begin */
1541 s->s_flags &= ~MS_RDONLY;
1542 err = journal_begin(&th, s, 10);
1543 if (err)
1544 goto out_err_unlock;
1545
1546 /* Mount a partition which is read-only, read-write */
1547 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1548 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1549 s->s_flags &= ~MS_RDONLY;
1550 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1551 if (!old_format_only(s))
1552 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1553 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1554 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1555 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1556 }
1557 /* this will force a full flush of all journal lists */
1558 SB_JOURNAL(s)->j_must_wait = 1;
1559 err = journal_end(&th);
1560 if (err)
1561 goto out_err_unlock;
1562
1563 reiserfs_write_unlock(s);
1564 if (!(*mount_flags & MS_RDONLY)) {
1565 dquot_resume(s, -1);
1566 reiserfs_write_lock(s);
1567 finish_unfinished(s);
1568 reiserfs_write_unlock(s);
1569 reiserfs_xattr_init(s, *mount_flags);
1570 }
1571
1572 out_ok_unlocked:
1573 if (new_opts)
1574 replace_mount_options(s, new_opts);
1575 return 0;
1576
1577 out_err_unlock:
1578 reiserfs_write_unlock(s);
1579 out_err:
1580 kfree(new_opts);
1581 return err;
1582 }
1583
1584 static int read_super_block(struct super_block *s, int offset)
1585 {
1586 struct buffer_head *bh;
1587 struct reiserfs_super_block *rs;
1588 int fs_blocksize;
1589
1590 bh = sb_bread(s, offset / s->s_blocksize);
1591 if (!bh) {
1592 reiserfs_warning(s, "sh-2006",
1593 "bread failed (dev %s, block %lu, size %lu)",
1594 s->s_id, offset / s->s_blocksize,
1595 s->s_blocksize);
1596 return 1;
1597 }
1598
1599 rs = (struct reiserfs_super_block *)bh->b_data;
1600 if (!is_any_reiserfs_magic_string(rs)) {
1601 brelse(bh);
1602 return 1;
1603 }
1604 /*
1605 * ok, reiserfs signature (old or new) found in at the given offset
1606 */
1607 fs_blocksize = sb_blocksize(rs);
1608 brelse(bh);
1609 sb_set_blocksize(s, fs_blocksize);
1610
1611 bh = sb_bread(s, offset / s->s_blocksize);
1612 if (!bh) {
1613 reiserfs_warning(s, "sh-2007",
1614 "bread failed (dev %s, block %lu, size %lu)",
1615 s->s_id, offset / s->s_blocksize,
1616 s->s_blocksize);
1617 return 1;
1618 }
1619
1620 rs = (struct reiserfs_super_block *)bh->b_data;
1621 if (sb_blocksize(rs) != s->s_blocksize) {
1622 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1623 "filesystem on (dev %s, block %llu, size %lu)",
1624 s->s_id,
1625 (unsigned long long)bh->b_blocknr,
1626 s->s_blocksize);
1627 brelse(bh);
1628 return 1;
1629 }
1630
1631 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1632 brelse(bh);
1633 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1634 "--rebuild-tree run detected. Please run\n"
1635 "reiserfsck --rebuild-tree and wait for a "
1636 "completion. If that fails\n"
1637 "get newer reiserfsprogs package");
1638 return 1;
1639 }
1640
1641 SB_BUFFER_WITH_SB(s) = bh;
1642 SB_DISK_SUPER_BLOCK(s) = rs;
1643
1644 /*
1645 * magic is of non-standard journal filesystem, look at s_version to
1646 * find which format is in use
1647 */
1648 if (is_reiserfs_jr(rs)) {
1649 if (sb_version(rs) == REISERFS_VERSION_2)
1650 reiserfs_info(s, "found reiserfs format \"3.6\""
1651 " with non-standard journal\n");
1652 else if (sb_version(rs) == REISERFS_VERSION_1)
1653 reiserfs_info(s, "found reiserfs format \"3.5\""
1654 " with non-standard journal\n");
1655 else {
1656 reiserfs_warning(s, "sh-2012", "found unknown "
1657 "format \"%u\" of reiserfs with "
1658 "non-standard magic", sb_version(rs));
1659 return 1;
1660 }
1661 } else
1662 /*
1663 * s_version of standard format may contain incorrect
1664 * information, so we just look at the magic string
1665 */
1666 reiserfs_info(s,
1667 "found reiserfs format \"%s\" with standard journal\n",
1668 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1669
1670 s->s_op = &reiserfs_sops;
1671 s->s_export_op = &reiserfs_export_ops;
1672 #ifdef CONFIG_QUOTA
1673 s->s_qcop = &reiserfs_qctl_operations;
1674 s->dq_op = &reiserfs_quota_operations;
1675 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1676 #endif
1677
1678 /*
1679 * new format is limited by the 32 bit wide i_blocks field, want to
1680 * be one full block below that.
1681 */
1682 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1683 return 0;
1684 }
1685
1686 /* after journal replay, reread all bitmap and super blocks */
1687 static int reread_meta_blocks(struct super_block *s)
1688 {
1689 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
1690 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1691 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1692 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1693 return 1;
1694 }
1695
1696 return 0;
1697 }
1698
1699 /* hash detection stuff */
1700
1701 /*
1702 * if root directory is empty - we set default - Yura's - hash and
1703 * warn about it
1704 * FIXME: we look for only one name in a directory. If tea and yura
1705 * both have the same value - we ask user to send report to the
1706 * mailing list
1707 */
1708 static __u32 find_hash_out(struct super_block *s)
1709 {
1710 int retval;
1711 struct inode *inode;
1712 struct cpu_key key;
1713 INITIALIZE_PATH(path);
1714 struct reiserfs_dir_entry de;
1715 struct reiserfs_de_head *deh;
1716 __u32 hash = DEFAULT_HASH;
1717 __u32 deh_hashval, teahash, r5hash, yurahash;
1718
1719 inode = d_inode(s->s_root);
1720
1721 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1722 retval = search_by_entry_key(s, &key, &path, &de);
1723 if (retval == IO_ERROR) {
1724 pathrelse(&path);
1725 return UNSET_HASH;
1726 }
1727 if (retval == NAME_NOT_FOUND)
1728 de.de_entry_num--;
1729
1730 set_de_name_and_namelen(&de);
1731 deh = de.de_deh + de.de_entry_num;
1732
1733 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1734 /* allow override in this case */
1735 if (reiserfs_rupasov_hash(s))
1736 hash = YURA_HASH;
1737 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1738 goto out;
1739 }
1740
1741 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1742 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1743 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1744 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1745
1746 if ((teahash == r5hash && deh_hashval == r5hash) ||
1747 (teahash == yurahash && deh_hashval == yurahash) ||
1748 (r5hash == yurahash && deh_hashval == yurahash)) {
1749 reiserfs_warning(s, "reiserfs-2506",
1750 "Unable to automatically detect hash "
1751 "function. Please mount with -o "
1752 "hash={tea,rupasov,r5}");
1753 hash = UNSET_HASH;
1754 goto out;
1755 }
1756
1757 if (deh_hashval == yurahash)
1758 hash = YURA_HASH;
1759 else if (deh_hashval == teahash)
1760 hash = TEA_HASH;
1761 else if (deh_hashval == r5hash)
1762 hash = R5_HASH;
1763 else {
1764 reiserfs_warning(s, "reiserfs-2506",
1765 "Unrecognised hash function");
1766 hash = UNSET_HASH;
1767 }
1768 out:
1769 pathrelse(&path);
1770 return hash;
1771 }
1772
1773 /* finds out which hash names are sorted with */
1774 static int what_hash(struct super_block *s)
1775 {
1776 __u32 code;
1777
1778 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1779
1780 /*
1781 * reiserfs_hash_detect() == true if any of the hash mount options
1782 * were used. We must check them to make sure the user isn't
1783 * using a bad hash value
1784 */
1785 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1786 code = find_hash_out(s);
1787
1788 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1789 /*
1790 * detection has found the hash, and we must check against the
1791 * mount options
1792 */
1793 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1794 reiserfs_warning(s, "reiserfs-2507",
1795 "Error, %s hash detected, "
1796 "unable to force rupasov hash",
1797 reiserfs_hashname(code));
1798 code = UNSET_HASH;
1799 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1800 reiserfs_warning(s, "reiserfs-2508",
1801 "Error, %s hash detected, "
1802 "unable to force tea hash",
1803 reiserfs_hashname(code));
1804 code = UNSET_HASH;
1805 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1806 reiserfs_warning(s, "reiserfs-2509",
1807 "Error, %s hash detected, "
1808 "unable to force r5 hash",
1809 reiserfs_hashname(code));
1810 code = UNSET_HASH;
1811 }
1812 } else {
1813 /*
1814 * find_hash_out was not called or
1815 * could not determine the hash
1816 */
1817 if (reiserfs_rupasov_hash(s)) {
1818 code = YURA_HASH;
1819 } else if (reiserfs_tea_hash(s)) {
1820 code = TEA_HASH;
1821 } else if (reiserfs_r5_hash(s)) {
1822 code = R5_HASH;
1823 }
1824 }
1825
1826 /*
1827 * if we are mounted RW, and we have a new valid hash code, update
1828 * the super
1829 */
1830 if (code != UNSET_HASH &&
1831 !(s->s_flags & MS_RDONLY) &&
1832 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1833 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1834 }
1835 return code;
1836 }
1837
1838 /* return pointer to appropriate function */
1839 static hashf_t hash_function(struct super_block *s)
1840 {
1841 switch (what_hash(s)) {
1842 case TEA_HASH:
1843 reiserfs_info(s, "Using tea hash to sort names\n");
1844 return keyed_hash;
1845 case YURA_HASH:
1846 reiserfs_info(s, "Using rupasov hash to sort names\n");
1847 return yura_hash;
1848 case R5_HASH:
1849 reiserfs_info(s, "Using r5 hash to sort names\n");
1850 return r5_hash;
1851 }
1852 return NULL;
1853 }
1854
1855 /* this is used to set up correct value for old partitions */
1856 static int function2code(hashf_t func)
1857 {
1858 if (func == keyed_hash)
1859 return TEA_HASH;
1860 if (func == yura_hash)
1861 return YURA_HASH;
1862 if (func == r5_hash)
1863 return R5_HASH;
1864
1865 BUG(); /* should never happen */
1866
1867 return 0;
1868 }
1869
1870 #define SWARN(silent, s, id, ...) \
1871 if (!(silent)) \
1872 reiserfs_warning(s, id, __VA_ARGS__)
1873
1874 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1875 {
1876 struct inode *root_inode;
1877 struct reiserfs_transaction_handle th;
1878 int old_format = 0;
1879 unsigned long blocks;
1880 unsigned int commit_max_age = 0;
1881 int jinit_done = 0;
1882 struct reiserfs_iget_args args;
1883 struct reiserfs_super_block *rs;
1884 char *jdev_name;
1885 struct reiserfs_sb_info *sbi;
1886 int errval = -EINVAL;
1887 char *qf_names[REISERFS_MAXQUOTAS] = {};
1888 unsigned int qfmt = 0;
1889
1890 save_mount_options(s, data);
1891
1892 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1893 if (!sbi)
1894 return -ENOMEM;
1895 s->s_fs_info = sbi;
1896 /* Set default values for options: non-aggressive tails, RO on errors */
1897 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1898 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1899 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1900 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1901 sbi->s_alloc_options.preallocmin = 0;
1902 /* Preallocate by 16 blocks (17-1) at once */
1903 sbi->s_alloc_options.preallocsize = 17;
1904 /* setup default block allocator options */
1905 reiserfs_init_alloc_options(s);
1906
1907 spin_lock_init(&sbi->old_work_lock);
1908 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1909 mutex_init(&sbi->lock);
1910 sbi->lock_depth = -1;
1911
1912 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1913 s->s_id);
1914 if (!sbi->commit_wq) {
1915 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1916 errval = -ENOMEM;
1917 goto error_unlocked;
1918 }
1919
1920 jdev_name = NULL;
1921 if (reiserfs_parse_options
1922 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1923 &commit_max_age, qf_names, &qfmt) == 0) {
1924 goto error_unlocked;
1925 }
1926 if (jdev_name && jdev_name[0]) {
1927 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1928 if (!sbi->s_jdev) {
1929 SWARN(silent, s, "", "Cannot allocate memory for "
1930 "journal device name");
1931 goto error_unlocked;
1932 }
1933 }
1934 #ifdef CONFIG_QUOTA
1935 handle_quota_files(s, qf_names, &qfmt);
1936 #endif
1937
1938 if (blocks) {
1939 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1940 goto error_unlocked;
1941 }
1942
1943 /*
1944 * try old format (undistributed bitmap, super block in 8-th 1k
1945 * block of a device)
1946 */
1947 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1948 old_format = 1;
1949
1950 /*
1951 * try new format (64-th 1k block), which can contain reiserfs
1952 * super block
1953 */
1954 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1955 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1956 s->s_id);
1957 goto error_unlocked;
1958 }
1959
1960 rs = SB_DISK_SUPER_BLOCK(s);
1961 /*
1962 * Let's do basic sanity check to verify that underlying device is not
1963 * smaller than the filesystem. If the check fails then abort and
1964 * scream, because bad stuff will happen otherwise.
1965 */
1966 if (s->s_bdev && s->s_bdev->bd_inode
1967 && i_size_read(s->s_bdev->bd_inode) <
1968 sb_block_count(rs) * sb_blocksize(rs)) {
1969 SWARN(silent, s, "", "Filesystem cannot be "
1970 "mounted because it is bigger than the device");
1971 SWARN(silent, s, "", "You may need to run fsck "
1972 "or increase size of your LVM partition");
1973 SWARN(silent, s, "", "Or may be you forgot to "
1974 "reboot after fdisk when it told you to");
1975 goto error_unlocked;
1976 }
1977
1978 sbi->s_mount_state = SB_REISERFS_STATE(s);
1979 sbi->s_mount_state = REISERFS_VALID_FS;
1980
1981 if ((errval = reiserfs_init_bitmap_cache(s))) {
1982 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
1983 goto error_unlocked;
1984 }
1985
1986 errval = -EINVAL;
1987 #ifdef CONFIG_REISERFS_CHECK
1988 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
1989 SWARN(silent, s, "", "- it is slow mode for debugging.");
1990 #endif
1991
1992 /* make data=ordered the default */
1993 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1994 !reiserfs_data_writeback(s)) {
1995 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1996 }
1997
1998 if (reiserfs_data_log(s)) {
1999 reiserfs_info(s, "using journaled data mode\n");
2000 } else if (reiserfs_data_ordered(s)) {
2001 reiserfs_info(s, "using ordered data mode\n");
2002 } else {
2003 reiserfs_info(s, "using writeback data mode\n");
2004 }
2005 if (reiserfs_barrier_flush(s)) {
2006 printk("reiserfs: using flush barriers\n");
2007 }
2008
2009 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2010 SWARN(silent, s, "sh-2022",
2011 "unable to initialize journal space");
2012 goto error_unlocked;
2013 } else {
2014 /*
2015 * once this is set, journal_release must be called
2016 * if we error out of the mount
2017 */
2018 jinit_done = 1;
2019 }
2020
2021 if (reread_meta_blocks(s)) {
2022 SWARN(silent, s, "jmacd-9",
2023 "unable to reread meta blocks after journal init");
2024 goto error_unlocked;
2025 }
2026
2027 if (replay_only(s))
2028 goto error_unlocked;
2029
2030 s->s_xattr = reiserfs_xattr_handlers;
2031
2032 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
2033 SWARN(silent, s, "clm-7000",
2034 "Detected readonly device, marking FS readonly");
2035 s->s_flags |= MS_RDONLY;
2036 }
2037 args.objectid = REISERFS_ROOT_OBJECTID;
2038 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2039 root_inode =
2040 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2041 reiserfs_init_locked_inode, (void *)&args);
2042 if (!root_inode) {
2043 SWARN(silent, s, "jmacd-10", "get root inode failed");
2044 goto error_unlocked;
2045 }
2046
2047 /*
2048 * This path assumed to be called with the BKL in the old times.
2049 * Now we have inherited the big reiserfs lock from it and many
2050 * reiserfs helpers called in the mount path and elsewhere require
2051 * this lock to be held even if it's not always necessary. Let's be
2052 * conservative and hold it early. The window can be reduced after
2053 * careful review of the code.
2054 */
2055 reiserfs_write_lock(s);
2056
2057 if (root_inode->i_state & I_NEW) {
2058 reiserfs_read_locked_inode(root_inode, &args);
2059 unlock_new_inode(root_inode);
2060 }
2061
2062 s->s_root = d_make_root(root_inode);
2063 if (!s->s_root)
2064 goto error;
2065 /* define and initialize hash function */
2066 sbi->s_hash_function = hash_function(s);
2067 if (sbi->s_hash_function == NULL) {
2068 dput(s->s_root);
2069 s->s_root = NULL;
2070 goto error;
2071 }
2072
2073 if (is_reiserfs_3_5(rs)
2074 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2075 set_bit(REISERFS_3_5, &sbi->s_properties);
2076 else if (old_format)
2077 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2078 else
2079 set_bit(REISERFS_3_6, &sbi->s_properties);
2080
2081 if (!(s->s_flags & MS_RDONLY)) {
2082
2083 errval = journal_begin(&th, s, 1);
2084 if (errval) {
2085 dput(s->s_root);
2086 s->s_root = NULL;
2087 goto error;
2088 }
2089 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2090
2091 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2092 set_sb_fs_state(rs, 0);
2093
2094 /*
2095 * Clear out s_bmap_nr if it would wrap. We can handle this
2096 * case, but older revisions can't. This will cause the
2097 * file system to fail mount on those older implementations,
2098 * avoiding corruption. -jeffm
2099 */
2100 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2101 sb_bmap_nr(rs) != 0) {
2102 reiserfs_warning(s, "super-2030", "This file system "
2103 "claims to use %u bitmap blocks in "
2104 "its super block, but requires %u. "
2105 "Clearing to zero.", sb_bmap_nr(rs),
2106 reiserfs_bmap_count(s));
2107
2108 set_sb_bmap_nr(rs, 0);
2109 }
2110
2111 if (old_format_only(s)) {
2112 /*
2113 * filesystem of format 3.5 either with standard
2114 * or non-standard journal
2115 */
2116 if (convert_reiserfs(s)) {
2117 /* and -o conv is given */
2118 if (!silent)
2119 reiserfs_info(s,
2120 "converting 3.5 filesystem to the 3.6 format");
2121
2122 if (is_reiserfs_3_5(rs))
2123 /*
2124 * put magic string of 3.6 format.
2125 * 2.2 will not be able to
2126 * mount this filesystem anymore
2127 */
2128 memcpy(rs->s_v1.s_magic,
2129 reiserfs_3_6_magic_string,
2130 sizeof
2131 (reiserfs_3_6_magic_string));
2132
2133 set_sb_version(rs, REISERFS_VERSION_2);
2134 reiserfs_convert_objectid_map_v1(s);
2135 set_bit(REISERFS_3_6, &sbi->s_properties);
2136 clear_bit(REISERFS_3_5, &sbi->s_properties);
2137 } else if (!silent) {
2138 reiserfs_info(s, "using 3.5.x disk format\n");
2139 }
2140 } else
2141 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2142
2143
2144 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2145 errval = journal_end(&th);
2146 if (errval) {
2147 dput(s->s_root);
2148 s->s_root = NULL;
2149 goto error;
2150 }
2151
2152 reiserfs_write_unlock(s);
2153 if ((errval = reiserfs_lookup_privroot(s)) ||
2154 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2155 dput(s->s_root);
2156 s->s_root = NULL;
2157 goto error_unlocked;
2158 }
2159 reiserfs_write_lock(s);
2160
2161 /*
2162 * look for files which were to be removed in previous session
2163 */
2164 finish_unfinished(s);
2165 } else {
2166 if (old_format_only(s) && !silent) {
2167 reiserfs_info(s, "using 3.5.x disk format\n");
2168 }
2169
2170 reiserfs_write_unlock(s);
2171 if ((errval = reiserfs_lookup_privroot(s)) ||
2172 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2173 dput(s->s_root);
2174 s->s_root = NULL;
2175 goto error_unlocked;
2176 }
2177 reiserfs_write_lock(s);
2178 }
2179 /*
2180 * mark hash in super block: it could be unset. overwrite should be ok
2181 */
2182 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2183
2184 handle_attrs(s);
2185
2186 reiserfs_proc_info_init(s);
2187
2188 init_waitqueue_head(&(sbi->s_wait));
2189 spin_lock_init(&sbi->bitmap_lock);
2190
2191 reiserfs_write_unlock(s);
2192
2193 return (0);
2194
2195 error:
2196 reiserfs_write_unlock(s);
2197
2198 error_unlocked:
2199 /* kill the commit thread, free journal ram */
2200 if (jinit_done) {
2201 reiserfs_write_lock(s);
2202 journal_release_error(NULL, s);
2203 reiserfs_write_unlock(s);
2204 }
2205
2206 if (sbi->commit_wq)
2207 destroy_workqueue(sbi->commit_wq);
2208
2209 reiserfs_cancel_old_flush(s);
2210
2211 reiserfs_free_bitmap_cache(s);
2212 if (SB_BUFFER_WITH_SB(s))
2213 brelse(SB_BUFFER_WITH_SB(s));
2214 #ifdef CONFIG_QUOTA
2215 {
2216 int j;
2217 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2218 kfree(qf_names[j]);
2219 }
2220 #endif
2221 kfree(sbi->s_jdev);
2222 kfree(sbi);
2223
2224 s->s_fs_info = NULL;
2225 return errval;
2226 }
2227
2228 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2229 {
2230 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2231
2232 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2233 buf->f_bfree = sb_free_blocks(rs);
2234 buf->f_bavail = buf->f_bfree;
2235 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2236 buf->f_bsize = dentry->d_sb->s_blocksize;
2237 /* changed to accommodate gcc folks. */
2238 buf->f_type = REISERFS_SUPER_MAGIC;
2239 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2240 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2241 sizeof(rs->s_uuid)/2);
2242
2243 return 0;
2244 }
2245
2246 #ifdef CONFIG_QUOTA
2247 static int reiserfs_write_dquot(struct dquot *dquot)
2248 {
2249 struct reiserfs_transaction_handle th;
2250 int ret, err;
2251 int depth;
2252
2253 reiserfs_write_lock(dquot->dq_sb);
2254 ret =
2255 journal_begin(&th, dquot->dq_sb,
2256 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2257 if (ret)
2258 goto out;
2259 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2260 ret = dquot_commit(dquot);
2261 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2262 err = journal_end(&th);
2263 if (!ret && err)
2264 ret = err;
2265 out:
2266 reiserfs_write_unlock(dquot->dq_sb);
2267 return ret;
2268 }
2269
2270 static int reiserfs_acquire_dquot(struct dquot *dquot)
2271 {
2272 struct reiserfs_transaction_handle th;
2273 int ret, err;
2274 int depth;
2275
2276 reiserfs_write_lock(dquot->dq_sb);
2277 ret =
2278 journal_begin(&th, dquot->dq_sb,
2279 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2280 if (ret)
2281 goto out;
2282 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2283 ret = dquot_acquire(dquot);
2284 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2285 err = journal_end(&th);
2286 if (!ret && err)
2287 ret = err;
2288 out:
2289 reiserfs_write_unlock(dquot->dq_sb);
2290 return ret;
2291 }
2292
2293 static int reiserfs_release_dquot(struct dquot *dquot)
2294 {
2295 struct reiserfs_transaction_handle th;
2296 int ret, err;
2297
2298 reiserfs_write_lock(dquot->dq_sb);
2299 ret =
2300 journal_begin(&th, dquot->dq_sb,
2301 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2302 reiserfs_write_unlock(dquot->dq_sb);
2303 if (ret) {
2304 /* Release dquot anyway to avoid endless cycle in dqput() */
2305 dquot_release(dquot);
2306 goto out;
2307 }
2308 ret = dquot_release(dquot);
2309 reiserfs_write_lock(dquot->dq_sb);
2310 err = journal_end(&th);
2311 if (!ret && err)
2312 ret = err;
2313 reiserfs_write_unlock(dquot->dq_sb);
2314 out:
2315 return ret;
2316 }
2317
2318 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2319 {
2320 /* Are we journaling quotas? */
2321 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2322 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2323 dquot_mark_dquot_dirty(dquot);
2324 return reiserfs_write_dquot(dquot);
2325 } else
2326 return dquot_mark_dquot_dirty(dquot);
2327 }
2328
2329 static int reiserfs_write_info(struct super_block *sb, int type)
2330 {
2331 struct reiserfs_transaction_handle th;
2332 int ret, err;
2333 int depth;
2334
2335 /* Data block + inode block */
2336 reiserfs_write_lock(sb);
2337 ret = journal_begin(&th, sb, 2);
2338 if (ret)
2339 goto out;
2340 depth = reiserfs_write_unlock_nested(sb);
2341 ret = dquot_commit_info(sb, type);
2342 reiserfs_write_lock_nested(sb, depth);
2343 err = journal_end(&th);
2344 if (!ret && err)
2345 ret = err;
2346 out:
2347 reiserfs_write_unlock(sb);
2348 return ret;
2349 }
2350
2351 /*
2352 * Turn on quotas during mount time - we need to find the quota file and such...
2353 */
2354 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2355 {
2356 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2357 REISERFS_SB(sb)->s_jquota_fmt, type);
2358 }
2359
2360 /*
2361 * Standard function to be called on quota_on
2362 */
2363 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2364 struct path *path)
2365 {
2366 int err;
2367 struct inode *inode;
2368 struct reiserfs_transaction_handle th;
2369 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2370
2371 reiserfs_write_lock(sb);
2372 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2373 err = -EINVAL;
2374 goto out;
2375 }
2376
2377 /* Quotafile not on the same filesystem? */
2378 if (path->dentry->d_sb != sb) {
2379 err = -EXDEV;
2380 goto out;
2381 }
2382 inode = d_inode(path->dentry);
2383 /*
2384 * We must not pack tails for quota files on reiserfs for quota
2385 * IO to work
2386 */
2387 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2388 err = reiserfs_unpack(inode, NULL);
2389 if (err) {
2390 reiserfs_warning(sb, "super-6520",
2391 "Unpacking tail of quota file failed"
2392 " (%d). Cannot turn on quotas.", err);
2393 err = -EINVAL;
2394 goto out;
2395 }
2396 mark_inode_dirty(inode);
2397 }
2398 /* Journaling quota? */
2399 if (REISERFS_SB(sb)->s_qf_names[type]) {
2400 /* Quotafile not of fs root? */
2401 if (path->dentry->d_parent != sb->s_root)
2402 reiserfs_warning(sb, "super-6521",
2403 "Quota file not on filesystem root. "
2404 "Journalled quota will not work.");
2405 }
2406
2407 /*
2408 * When we journal data on quota file, we have to flush journal to see
2409 * all updates to the file when we bypass pagecache...
2410 */
2411 if (reiserfs_file_data_log(inode)) {
2412 /* Just start temporary transaction and finish it */
2413 err = journal_begin(&th, sb, 1);
2414 if (err)
2415 goto out;
2416 err = journal_end_sync(&th);
2417 if (err)
2418 goto out;
2419 }
2420 reiserfs_write_unlock(sb);
2421 return dquot_quota_on(sb, type, format_id, path);
2422 out:
2423 reiserfs_write_unlock(sb);
2424 return err;
2425 }
2426
2427 /*
2428 * Read data from quotafile - avoid pagecache and such because we cannot afford
2429 * acquiring the locks... As quota files are never truncated and quota code
2430 * itself serializes the operations (and no one else should touch the files)
2431 * we don't have to be afraid of races
2432 */
2433 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2434 size_t len, loff_t off)
2435 {
2436 struct inode *inode = sb_dqopt(sb)->files[type];
2437 unsigned long blk = off >> sb->s_blocksize_bits;
2438 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2439 size_t toread;
2440 struct buffer_head tmp_bh, *bh;
2441 loff_t i_size = i_size_read(inode);
2442
2443 if (off > i_size)
2444 return 0;
2445 if (off + len > i_size)
2446 len = i_size - off;
2447 toread = len;
2448 while (toread > 0) {
2449 tocopy =
2450 sb->s_blocksize - offset <
2451 toread ? sb->s_blocksize - offset : toread;
2452 tmp_bh.b_state = 0;
2453 /*
2454 * Quota files are without tails so we can safely
2455 * use this function
2456 */
2457 reiserfs_write_lock(sb);
2458 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2459 reiserfs_write_unlock(sb);
2460 if (err)
2461 return err;
2462 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2463 memset(data, 0, tocopy);
2464 else {
2465 bh = sb_bread(sb, tmp_bh.b_blocknr);
2466 if (!bh)
2467 return -EIO;
2468 memcpy(data, bh->b_data + offset, tocopy);
2469 brelse(bh);
2470 }
2471 offset = 0;
2472 toread -= tocopy;
2473 data += tocopy;
2474 blk++;
2475 }
2476 return len;
2477 }
2478
2479 /*
2480 * Write to quotafile (we know the transaction is already started and has
2481 * enough credits)
2482 */
2483 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2484 const char *data, size_t len, loff_t off)
2485 {
2486 struct inode *inode = sb_dqopt(sb)->files[type];
2487 unsigned long blk = off >> sb->s_blocksize_bits;
2488 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2489 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2490 size_t towrite = len;
2491 struct buffer_head tmp_bh, *bh;
2492
2493 if (!current->journal_info) {
2494 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2495 (unsigned long long)off, (unsigned long long)len);
2496 return -EIO;
2497 }
2498 while (towrite > 0) {
2499 tocopy = sb->s_blocksize - offset < towrite ?
2500 sb->s_blocksize - offset : towrite;
2501 tmp_bh.b_state = 0;
2502 reiserfs_write_lock(sb);
2503 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2504 reiserfs_write_unlock(sb);
2505 if (err)
2506 goto out;
2507 if (offset || tocopy != sb->s_blocksize)
2508 bh = sb_bread(sb, tmp_bh.b_blocknr);
2509 else
2510 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2511 if (!bh) {
2512 err = -EIO;
2513 goto out;
2514 }
2515 lock_buffer(bh);
2516 memcpy(bh->b_data + offset, data, tocopy);
2517 flush_dcache_page(bh->b_page);
2518 set_buffer_uptodate(bh);
2519 unlock_buffer(bh);
2520 reiserfs_write_lock(sb);
2521 reiserfs_prepare_for_journal(sb, bh, 1);
2522 journal_mark_dirty(current->journal_info, bh);
2523 if (!journal_quota)
2524 reiserfs_add_ordered_list(inode, bh);
2525 reiserfs_write_unlock(sb);
2526 brelse(bh);
2527 offset = 0;
2528 towrite -= tocopy;
2529 data += tocopy;
2530 blk++;
2531 }
2532 out:
2533 if (len == towrite)
2534 return err;
2535 if (inode->i_size < off + len - towrite)
2536 i_size_write(inode, off + len - towrite);
2537 inode->i_mtime = inode->i_ctime = current_time(inode);
2538 mark_inode_dirty(inode);
2539 return len - towrite;
2540 }
2541
2542 #endif
2543
2544 static struct dentry *get_super_block(struct file_system_type *fs_type,
2545 int flags, const char *dev_name,
2546 void *data)
2547 {
2548 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2549 }
2550
2551 static int __init init_reiserfs_fs(void)
2552 {
2553 int ret;
2554
2555 ret = init_inodecache();
2556 if (ret)
2557 return ret;
2558
2559 reiserfs_proc_info_global_init();
2560
2561 ret = register_filesystem(&reiserfs_fs_type);
2562 if (ret)
2563 goto out;
2564
2565 return 0;
2566 out:
2567 reiserfs_proc_info_global_done();
2568 destroy_inodecache();
2569
2570 return ret;
2571 }
2572
2573 static void __exit exit_reiserfs_fs(void)
2574 {
2575 reiserfs_proc_info_global_done();
2576 unregister_filesystem(&reiserfs_fs_type);
2577 destroy_inodecache();
2578 }
2579
2580 struct file_system_type reiserfs_fs_type = {
2581 .owner = THIS_MODULE,
2582 .name = "reiserfs",
2583 .mount = get_super_block,
2584 .kill_sb = reiserfs_kill_sb,
2585 .fs_flags = FS_REQUIRES_DEV,
2586 };
2587 MODULE_ALIAS_FS("reiserfs");
2588
2589 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2590 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2591 MODULE_LICENSE("GPL");
2592
2593 module_init(init_reiserfs_fs);
2594 module_exit(exit_reiserfs_fs);
Linux with added FPC-III support