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Merge tag 'modules-for-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu...
[mirror_ubuntu-jammy-kernel.git] / fs / reiserfs / super.c
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 = kmem_cache_alloc(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_MEM_SPREAD|
674 SLAB_ACCOUNT),
675 init_once);
676 if (reiserfs_inode_cachep == NULL)
677 return -ENOMEM;
678 return 0;
679 }
680
681 static void destroy_inodecache(void)
682 {
683 /*
684 * Make sure all delayed rcu free inodes are flushed before we
685 * destroy cache.
686 */
687 rcu_barrier();
688 kmem_cache_destroy(reiserfs_inode_cachep);
689 }
690
691 /* we don't mark inodes dirty, we just log them */
692 static void reiserfs_dirty_inode(struct inode *inode, int flags)
693 {
694 struct reiserfs_transaction_handle th;
695
696 int err = 0;
697
698 if (sb_rdonly(inode->i_sb)) {
699 reiserfs_warning(inode->i_sb, "clm-6006",
700 "writing inode %lu on readonly FS",
701 inode->i_ino);
702 return;
703 }
704 reiserfs_write_lock(inode->i_sb);
705
706 /*
707 * this is really only used for atime updates, so they don't have
708 * to be included in O_SYNC or fsync
709 */
710 err = journal_begin(&th, inode->i_sb, 1);
711 if (err)
712 goto out;
713
714 reiserfs_update_sd(&th, inode);
715 journal_end(&th);
716
717 out:
718 reiserfs_write_unlock(inode->i_sb);
719 }
720
721 static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
722 {
723 struct super_block *s = root->d_sb;
724 struct reiserfs_journal *journal = SB_JOURNAL(s);
725 long opts = REISERFS_SB(s)->s_mount_opt;
726
727 if (opts & (1 << REISERFS_LARGETAIL))
728 seq_puts(seq, ",tails=on");
729 else if (!(opts & (1 << REISERFS_SMALLTAIL)))
730 seq_puts(seq, ",notail");
731 /* tails=small is default so we don't show it */
732
733 if (!(opts & (1 << REISERFS_BARRIER_FLUSH)))
734 seq_puts(seq, ",barrier=none");
735 /* barrier=flush is default so we don't show it */
736
737 if (opts & (1 << REISERFS_ERROR_CONTINUE))
738 seq_puts(seq, ",errors=continue");
739 else if (opts & (1 << REISERFS_ERROR_PANIC))
740 seq_puts(seq, ",errors=panic");
741 /* errors=ro is default so we don't show it */
742
743 if (opts & (1 << REISERFS_DATA_LOG))
744 seq_puts(seq, ",data=journal");
745 else if (opts & (1 << REISERFS_DATA_WRITEBACK))
746 seq_puts(seq, ",data=writeback");
747 /* data=ordered is default so we don't show it */
748
749 if (opts & (1 << REISERFS_ATTRS))
750 seq_puts(seq, ",attrs");
751
752 if (opts & (1 << REISERFS_XATTRS_USER))
753 seq_puts(seq, ",user_xattr");
754
755 if (opts & (1 << REISERFS_EXPOSE_PRIVROOT))
756 seq_puts(seq, ",expose_privroot");
757
758 if (opts & (1 << REISERFS_POSIXACL))
759 seq_puts(seq, ",acl");
760
761 if (REISERFS_SB(s)->s_jdev)
762 seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
763
764 if (journal->j_max_commit_age != journal->j_default_max_commit_age)
765 seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
766
767 #ifdef CONFIG_QUOTA
768 if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
769 seq_show_option(seq, "usrjquota",
770 REISERFS_SB(s)->s_qf_names[USRQUOTA]);
771 else if (opts & (1 << REISERFS_USRQUOTA))
772 seq_puts(seq, ",usrquota");
773 if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
774 seq_show_option(seq, "grpjquota",
775 REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
776 else if (opts & (1 << REISERFS_GRPQUOTA))
777 seq_puts(seq, ",grpquota");
778 if (REISERFS_SB(s)->s_jquota_fmt) {
779 if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_OLD)
780 seq_puts(seq, ",jqfmt=vfsold");
781 else if (REISERFS_SB(s)->s_jquota_fmt == QFMT_VFS_V0)
782 seq_puts(seq, ",jqfmt=vfsv0");
783 }
784 #endif
785
786 /* Block allocator options */
787 if (opts & (1 << REISERFS_NO_BORDER))
788 seq_puts(seq, ",block-allocator=noborder");
789 if (opts & (1 << REISERFS_NO_UNHASHED_RELOCATION))
790 seq_puts(seq, ",block-allocator=no_unhashed_relocation");
791 if (opts & (1 << REISERFS_HASHED_RELOCATION))
792 seq_puts(seq, ",block-allocator=hashed_relocation");
793 if (opts & (1 << REISERFS_TEST4))
794 seq_puts(seq, ",block-allocator=test4");
795 show_alloc_options(seq, s);
796 return 0;
797 }
798
799 #ifdef CONFIG_QUOTA
800 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
801 size_t, loff_t);
802 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
803 loff_t);
804
805 static struct dquot **reiserfs_get_dquots(struct inode *inode)
806 {
807 return REISERFS_I(inode)->i_dquot;
808 }
809 #endif
810
811 static const struct super_operations reiserfs_sops = {
812 .alloc_inode = reiserfs_alloc_inode,
813 .free_inode = reiserfs_free_inode,
814 .write_inode = reiserfs_write_inode,
815 .dirty_inode = reiserfs_dirty_inode,
816 .evict_inode = reiserfs_evict_inode,
817 .put_super = reiserfs_put_super,
818 .sync_fs = reiserfs_sync_fs,
819 .freeze_fs = reiserfs_freeze,
820 .unfreeze_fs = reiserfs_unfreeze,
821 .statfs = reiserfs_statfs,
822 .remount_fs = reiserfs_remount,
823 .show_options = reiserfs_show_options,
824 #ifdef CONFIG_QUOTA
825 .quota_read = reiserfs_quota_read,
826 .quota_write = reiserfs_quota_write,
827 .get_dquots = reiserfs_get_dquots,
828 #endif
829 };
830
831 #ifdef CONFIG_QUOTA
832 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
833
834 static int reiserfs_write_dquot(struct dquot *);
835 static int reiserfs_acquire_dquot(struct dquot *);
836 static int reiserfs_release_dquot(struct dquot *);
837 static int reiserfs_mark_dquot_dirty(struct dquot *);
838 static int reiserfs_write_info(struct super_block *, int);
839 static int reiserfs_quota_on(struct super_block *, int, int, const struct path *);
840
841 static const struct dquot_operations reiserfs_quota_operations = {
842 .write_dquot = reiserfs_write_dquot,
843 .acquire_dquot = reiserfs_acquire_dquot,
844 .release_dquot = reiserfs_release_dquot,
845 .mark_dirty = reiserfs_mark_dquot_dirty,
846 .write_info = reiserfs_write_info,
847 .alloc_dquot = dquot_alloc,
848 .destroy_dquot = dquot_destroy,
849 .get_next_id = dquot_get_next_id,
850 };
851
852 static const struct quotactl_ops reiserfs_qctl_operations = {
853 .quota_on = reiserfs_quota_on,
854 .quota_off = reiserfs_quota_off,
855 .quota_sync = dquot_quota_sync,
856 .get_state = dquot_get_state,
857 .set_info = dquot_set_dqinfo,
858 .get_dqblk = dquot_get_dqblk,
859 .set_dqblk = dquot_set_dqblk,
860 };
861 #endif
862
863 static const struct export_operations reiserfs_export_ops = {
864 .encode_fh = reiserfs_encode_fh,
865 .fh_to_dentry = reiserfs_fh_to_dentry,
866 .fh_to_parent = reiserfs_fh_to_parent,
867 .get_parent = reiserfs_get_parent,
868 };
869
870 /*
871 * this struct is used in reiserfs_getopt () for containing the value for
872 * those mount options that have values rather than being toggles.
873 */
874 typedef struct {
875 char *value;
876 /*
877 * bitmask which is to set on mount_options bitmask
878 * when this value is found, 0 is no bits are to be changed.
879 */
880 int setmask;
881 /*
882 * bitmask which is to clear on mount_options bitmask
883 * when this value is found, 0 is no bits are to be changed.
884 * This is applied BEFORE setmask
885 */
886 int clrmask;
887 } arg_desc_t;
888
889 /* Set this bit in arg_required to allow empty arguments */
890 #define REISERFS_OPT_ALLOWEMPTY 31
891
892 /*
893 * this struct is used in reiserfs_getopt() for describing the
894 * set of reiserfs mount options
895 */
896 typedef struct {
897 char *option_name;
898
899 /* 0 if argument is not required, not 0 otherwise */
900 int arg_required;
901
902 /* list of values accepted by an option */
903 const arg_desc_t *values;
904
905 /*
906 * bitmask which is to set on mount_options bitmask
907 * when this value is found, 0 is no bits are to be changed.
908 */
909 int setmask;
910
911 /*
912 * bitmask which is to clear on mount_options bitmask
913 * when this value is found, 0 is no bits are to be changed.
914 * This is applied BEFORE setmask
915 */
916 int clrmask;
917 } opt_desc_t;
918
919 /* possible values for -o data= */
920 static const arg_desc_t logging_mode[] = {
921 {"ordered", 1 << REISERFS_DATA_ORDERED,
922 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
923 {"journal", 1 << REISERFS_DATA_LOG,
924 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
925 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
926 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
927 {.value = NULL}
928 };
929
930 /* possible values for -o barrier= */
931 static const arg_desc_t barrier_mode[] = {
932 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
933 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
934 {.value = NULL}
935 };
936
937 /*
938 * possible values for "-o block-allocator=" and bits which are to be set in
939 * s_mount_opt of reiserfs specific part of in-core super block
940 */
941 static const arg_desc_t balloc[] = {
942 {"noborder", 1 << REISERFS_NO_BORDER, 0},
943 {"border", 0, 1 << REISERFS_NO_BORDER},
944 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
945 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
946 {"test4", 1 << REISERFS_TEST4, 0},
947 {"notest4", 0, 1 << REISERFS_TEST4},
948 {NULL, 0, 0}
949 };
950
951 static const arg_desc_t tails[] = {
952 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
953 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
954 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
955 {NULL, 0, 0}
956 };
957
958 static const arg_desc_t error_actions[] = {
959 {"panic", 1 << REISERFS_ERROR_PANIC,
960 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
961 {"ro-remount", 1 << REISERFS_ERROR_RO,
962 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
963 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
964 {"continue", 1 << REISERFS_ERROR_CONTINUE,
965 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
966 #endif
967 {NULL, 0, 0},
968 };
969
970 /*
971 * proceed only one option from a list *cur - string containing of mount
972 * options
973 * opts - array of options which are accepted
974 * opt_arg - if option is found and requires an argument and if it is specifed
975 * in the input - pointer to the argument is stored here
976 * bit_flags - if option requires to set a certain bit - it is set here
977 * return -1 if unknown option is found, opt->arg_required otherwise
978 */
979 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
980 char **opt_arg, unsigned long *bit_flags)
981 {
982 char *p;
983 /*
984 * foo=bar,
985 * ^ ^ ^
986 * | | +-- option_end
987 * | +-- arg_start
988 * +-- option_start
989 */
990 const opt_desc_t *opt;
991 const arg_desc_t *arg;
992
993 p = *cur;
994
995 /* assume argument cannot contain commas */
996 *cur = strchr(p, ',');
997 if (*cur) {
998 *(*cur) = '\0';
999 (*cur)++;
1000 }
1001
1002 if (!strncmp(p, "alloc=", 6)) {
1003 /*
1004 * Ugly special case, probably we should redo options
1005 * parser so that it can understand several arguments for
1006 * some options, also so that it can fill several bitfields
1007 * with option values.
1008 */
1009 if (reiserfs_parse_alloc_options(s, p + 6)) {
1010 return -1;
1011 } else {
1012 return 0;
1013 }
1014 }
1015
1016 /* for every option in the list */
1017 for (opt = opts; opt->option_name; opt++) {
1018 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
1019 if (bit_flags) {
1020 if (opt->clrmask ==
1021 (1 << REISERFS_UNSUPPORTED_OPT))
1022 reiserfs_warning(s, "super-6500",
1023 "%s not supported.\n",
1024 p);
1025 else
1026 *bit_flags &= ~opt->clrmask;
1027 if (opt->setmask ==
1028 (1 << REISERFS_UNSUPPORTED_OPT))
1029 reiserfs_warning(s, "super-6501",
1030 "%s not supported.\n",
1031 p);
1032 else
1033 *bit_flags |= opt->setmask;
1034 }
1035 break;
1036 }
1037 }
1038 if (!opt->option_name) {
1039 reiserfs_warning(s, "super-6502",
1040 "unknown mount option \"%s\"", p);
1041 return -1;
1042 }
1043
1044 p += strlen(opt->option_name);
1045 switch (*p) {
1046 case '=':
1047 if (!opt->arg_required) {
1048 reiserfs_warning(s, "super-6503",
1049 "the option \"%s\" does not "
1050 "require an argument\n",
1051 opt->option_name);
1052 return -1;
1053 }
1054 break;
1055
1056 case 0:
1057 if (opt->arg_required) {
1058 reiserfs_warning(s, "super-6504",
1059 "the option \"%s\" requires an "
1060 "argument\n", opt->option_name);
1061 return -1;
1062 }
1063 break;
1064 default:
1065 reiserfs_warning(s, "super-6505",
1066 "head of option \"%s\" is only correct\n",
1067 opt->option_name);
1068 return -1;
1069 }
1070
1071 /*
1072 * move to the argument, or to next option if argument is not
1073 * required
1074 */
1075 p++;
1076
1077 if (opt->arg_required
1078 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
1079 && !strlen(p)) {
1080 /* this catches "option=," if not allowed */
1081 reiserfs_warning(s, "super-6506",
1082 "empty argument for \"%s\"\n",
1083 opt->option_name);
1084 return -1;
1085 }
1086
1087 if (!opt->values) {
1088 /* *=NULLopt_arg contains pointer to argument */
1089 *opt_arg = p;
1090 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
1091 }
1092
1093 /* values possible for this option are listed in opt->values */
1094 for (arg = opt->values; arg->value; arg++) {
1095 if (!strcmp(p, arg->value)) {
1096 if (bit_flags) {
1097 *bit_flags &= ~arg->clrmask;
1098 *bit_flags |= arg->setmask;
1099 }
1100 return opt->arg_required;
1101 }
1102 }
1103
1104 reiserfs_warning(s, "super-6506",
1105 "bad value \"%s\" for option \"%s\"\n", p,
1106 opt->option_name);
1107 return -1;
1108 }
1109
1110 /* returns 0 if something is wrong in option string, 1 - otherwise */
1111 static int reiserfs_parse_options(struct super_block *s,
1112
1113 /* string given via mount's -o */
1114 char *options,
1115
1116 /*
1117 * after the parsing phase, contains the
1118 * collection of bitflags defining what
1119 * mount options were selected.
1120 */
1121 unsigned long *mount_options,
1122
1123 /* strtol-ed from NNN of resize=NNN */
1124 unsigned long *blocks,
1125 char **jdev_name,
1126 unsigned int *commit_max_age,
1127 char **qf_names,
1128 unsigned int *qfmt)
1129 {
1130 int c;
1131 char *arg = NULL;
1132 char *pos;
1133 opt_desc_t opts[] = {
1134 /*
1135 * Compatibility stuff, so that -o notail for old
1136 * setups still work
1137 */
1138 {"tails",.arg_required = 't',.values = tails},
1139 {"notail",.clrmask =
1140 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
1141 {"conv",.setmask = 1 << REISERFS_CONVERT},
1142 {"attrs",.setmask = 1 << REISERFS_ATTRS},
1143 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
1144 {"expose_privroot", .setmask = 1 << REISERFS_EXPOSE_PRIVROOT},
1145 #ifdef CONFIG_REISERFS_FS_XATTR
1146 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
1147 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
1148 #else
1149 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1150 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1151 #endif
1152 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
1153 {"acl",.setmask = 1 << REISERFS_POSIXACL},
1154 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
1155 #else
1156 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
1157 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
1158 #endif
1159 {.option_name = "nolog"},
1160 {"replayonly",.setmask = 1 << REPLAYONLY},
1161 {"block-allocator",.arg_required = 'a',.values = balloc},
1162 {"data",.arg_required = 'd',.values = logging_mode},
1163 {"barrier",.arg_required = 'b',.values = barrier_mode},
1164 {"resize",.arg_required = 'r',.values = NULL},
1165 {"jdev",.arg_required = 'j',.values = NULL},
1166 {"nolargeio",.arg_required = 'w',.values = NULL},
1167 {"commit",.arg_required = 'c',.values = NULL},
1168 {"usrquota",.setmask = 1 << REISERFS_USRQUOTA},
1169 {"grpquota",.setmask = 1 << REISERFS_GRPQUOTA},
1170 {"noquota",.clrmask = 1 << REISERFS_USRQUOTA | 1 << REISERFS_GRPQUOTA},
1171 {"errors",.arg_required = 'e',.values = error_actions},
1172 {"usrjquota",.arg_required =
1173 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1174 {"grpjquota",.arg_required =
1175 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
1176 {"jqfmt",.arg_required = 'f',.values = NULL},
1177 {.option_name = NULL}
1178 };
1179
1180 *blocks = 0;
1181 if (!options || !*options)
1182 /*
1183 * use default configuration: create tails, journaling on, no
1184 * conversion to newest format
1185 */
1186 return 1;
1187
1188 for (pos = options; pos;) {
1189 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
1190 if (c == -1)
1191 /* wrong option is given */
1192 return 0;
1193
1194 if (c == 'r') {
1195 char *p;
1196
1197 p = NULL;
1198 /* "resize=NNN" or "resize=auto" */
1199
1200 if (!strcmp(arg, "auto")) {
1201 /* From JFS code, to auto-get the size. */
1202 *blocks =
1203 i_size_read(s->s_bdev->bd_inode) >> s->
1204 s_blocksize_bits;
1205 } else {
1206 *blocks = simple_strtoul(arg, &p, 0);
1207 if (*p != '\0') {
1208 /* NNN does not look like a number */
1209 reiserfs_warning(s, "super-6507",
1210 "bad value %s for "
1211 "-oresize\n", arg);
1212 return 0;
1213 }
1214 }
1215 }
1216
1217 if (c == 'c') {
1218 char *p = NULL;
1219 unsigned long val = simple_strtoul(arg, &p, 0);
1220 /* commit=NNN (time in seconds) */
1221 if (*p != '\0' || val >= (unsigned int)-1) {
1222 reiserfs_warning(s, "super-6508",
1223 "bad value %s for -ocommit\n",
1224 arg);
1225 return 0;
1226 }
1227 *commit_max_age = (unsigned int)val;
1228 }
1229
1230 if (c == 'w') {
1231 reiserfs_warning(s, "super-6509", "nolargeio option "
1232 "is no longer supported");
1233 return 0;
1234 }
1235
1236 if (c == 'j') {
1237 if (arg && *arg && jdev_name) {
1238 /* Hm, already assigned? */
1239 if (*jdev_name) {
1240 reiserfs_warning(s, "super-6510",
1241 "journal device was "
1242 "already specified to "
1243 "be %s", *jdev_name);
1244 return 0;
1245 }
1246 *jdev_name = arg;
1247 }
1248 }
1249 #ifdef CONFIG_QUOTA
1250 if (c == 'u' || c == 'g') {
1251 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
1252
1253 if (sb_any_quota_loaded(s) &&
1254 (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
1255 reiserfs_warning(s, "super-6511",
1256 "cannot change journaled "
1257 "quota options when quota "
1258 "turned on.");
1259 return 0;
1260 }
1261 if (*arg) { /* Some filename specified? */
1262 if (REISERFS_SB(s)->s_qf_names[qtype]
1263 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
1264 arg)) {
1265 reiserfs_warning(s, "super-6512",
1266 "%s quota file "
1267 "already specified.",
1268 QTYPE2NAME(qtype));
1269 return 0;
1270 }
1271 if (strchr(arg, '/')) {
1272 reiserfs_warning(s, "super-6513",
1273 "quotafile must be "
1274 "on filesystem root.");
1275 return 0;
1276 }
1277 qf_names[qtype] = kstrdup(arg, GFP_KERNEL);
1278 if (!qf_names[qtype]) {
1279 reiserfs_warning(s, "reiserfs-2502",
1280 "not enough memory "
1281 "for storing "
1282 "quotafile name.");
1283 return 0;
1284 }
1285 if (qtype == USRQUOTA)
1286 *mount_options |= 1 << REISERFS_USRQUOTA;
1287 else
1288 *mount_options |= 1 << REISERFS_GRPQUOTA;
1289 } else {
1290 if (qf_names[qtype] !=
1291 REISERFS_SB(s)->s_qf_names[qtype])
1292 kfree(qf_names[qtype]);
1293 qf_names[qtype] = NULL;
1294 if (qtype == USRQUOTA)
1295 *mount_options &= ~(1 << REISERFS_USRQUOTA);
1296 else
1297 *mount_options &= ~(1 << REISERFS_GRPQUOTA);
1298 }
1299 }
1300 if (c == 'f') {
1301 if (!strcmp(arg, "vfsold"))
1302 *qfmt = QFMT_VFS_OLD;
1303 else if (!strcmp(arg, "vfsv0"))
1304 *qfmt = QFMT_VFS_V0;
1305 else {
1306 reiserfs_warning(s, "super-6514",
1307 "unknown quota format "
1308 "specified.");
1309 return 0;
1310 }
1311 if (sb_any_quota_loaded(s) &&
1312 *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
1313 reiserfs_warning(s, "super-6515",
1314 "cannot change journaled "
1315 "quota options when quota "
1316 "turned on.");
1317 return 0;
1318 }
1319 }
1320 #else
1321 if (c == 'u' || c == 'g' || c == 'f') {
1322 reiserfs_warning(s, "reiserfs-2503", "journaled "
1323 "quota options not supported.");
1324 return 0;
1325 }
1326 #endif
1327 }
1328
1329 #ifdef CONFIG_QUOTA
1330 if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
1331 && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
1332 reiserfs_warning(s, "super-6515",
1333 "journaled quota format not specified.");
1334 return 0;
1335 }
1336 if ((!(*mount_options & (1 << REISERFS_USRQUOTA)) &&
1337 sb_has_quota_loaded(s, USRQUOTA)) ||
1338 (!(*mount_options & (1 << REISERFS_GRPQUOTA)) &&
1339 sb_has_quota_loaded(s, GRPQUOTA))) {
1340 reiserfs_warning(s, "super-6516", "quota options must "
1341 "be present when quota is turned on.");
1342 return 0;
1343 }
1344 #endif
1345
1346 return 1;
1347 }
1348
1349 static void switch_data_mode(struct super_block *s, unsigned long mode)
1350 {
1351 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1352 (1 << REISERFS_DATA_ORDERED) |
1353 (1 << REISERFS_DATA_WRITEBACK));
1354 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1355 }
1356
1357 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1358 {
1359 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1360 if (!reiserfs_data_log(s)) {
1361 switch_data_mode(s, REISERFS_DATA_LOG);
1362 reiserfs_info(s, "switching to journaled data mode\n");
1363 }
1364 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1365 if (!reiserfs_data_ordered(s)) {
1366 switch_data_mode(s, REISERFS_DATA_ORDERED);
1367 reiserfs_info(s, "switching to ordered data mode\n");
1368 }
1369 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1370 if (!reiserfs_data_writeback(s)) {
1371 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1372 reiserfs_info(s, "switching to writeback data mode\n");
1373 }
1374 }
1375 }
1376
1377 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1378 {
1379 int flush = (1 << REISERFS_BARRIER_FLUSH);
1380 int none = (1 << REISERFS_BARRIER_NONE);
1381 int all_barrier = flush | none;
1382
1383 if (bits & all_barrier) {
1384 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1385 if (bits & flush) {
1386 REISERFS_SB(s)->s_mount_opt |= flush;
1387 printk("reiserfs: enabling write barrier flush mode\n");
1388 } else if (bits & none) {
1389 REISERFS_SB(s)->s_mount_opt |= none;
1390 printk("reiserfs: write barriers turned off\n");
1391 }
1392 }
1393 }
1394
1395 static void handle_attrs(struct super_block *s)
1396 {
1397 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1398
1399 if (reiserfs_attrs(s)) {
1400 if (old_format_only(s)) {
1401 reiserfs_warning(s, "super-6517", "cannot support "
1402 "attributes on 3.5.x disk format");
1403 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1404 return;
1405 }
1406 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1407 reiserfs_warning(s, "super-6518", "cannot support "
1408 "attributes until flag is set in "
1409 "super-block");
1410 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1411 }
1412 }
1413 }
1414
1415 #ifdef CONFIG_QUOTA
1416 static void handle_quota_files(struct super_block *s, char **qf_names,
1417 unsigned int *qfmt)
1418 {
1419 int i;
1420
1421 for (i = 0; i < REISERFS_MAXQUOTAS; i++) {
1422 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1423 kfree(REISERFS_SB(s)->s_qf_names[i]);
1424 REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
1425 }
1426 if (*qfmt)
1427 REISERFS_SB(s)->s_jquota_fmt = *qfmt;
1428 }
1429 #endif
1430
1431 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1432 {
1433 struct reiserfs_super_block *rs;
1434 struct reiserfs_transaction_handle th;
1435 unsigned long blocks;
1436 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1437 unsigned long safe_mask = 0;
1438 unsigned int commit_max_age = (unsigned int)-1;
1439 struct reiserfs_journal *journal = SB_JOURNAL(s);
1440 char *new_opts;
1441 int err;
1442 char *qf_names[REISERFS_MAXQUOTAS];
1443 unsigned int qfmt = 0;
1444 #ifdef CONFIG_QUOTA
1445 int i;
1446 #endif
1447
1448 new_opts = kstrdup(arg, GFP_KERNEL);
1449 if (arg && !new_opts)
1450 return -ENOMEM;
1451
1452 sync_filesystem(s);
1453 reiserfs_write_lock(s);
1454
1455 #ifdef CONFIG_QUOTA
1456 memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
1457 #endif
1458
1459 rs = SB_DISK_SUPER_BLOCK(s);
1460
1461 if (!reiserfs_parse_options
1462 (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
1463 qf_names, &qfmt)) {
1464 #ifdef CONFIG_QUOTA
1465 for (i = 0; i < REISERFS_MAXQUOTAS; i++)
1466 if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
1467 kfree(qf_names[i]);
1468 #endif
1469 err = -EINVAL;
1470 goto out_err_unlock;
1471 }
1472 #ifdef CONFIG_QUOTA
1473 handle_quota_files(s, qf_names, &qfmt);
1474 #endif
1475
1476 handle_attrs(s);
1477
1478 /* Add options that are safe here */
1479 safe_mask |= 1 << REISERFS_SMALLTAIL;
1480 safe_mask |= 1 << REISERFS_LARGETAIL;
1481 safe_mask |= 1 << REISERFS_NO_BORDER;
1482 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1483 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1484 safe_mask |= 1 << REISERFS_TEST4;
1485 safe_mask |= 1 << REISERFS_ATTRS;
1486 safe_mask |= 1 << REISERFS_XATTRS_USER;
1487 safe_mask |= 1 << REISERFS_POSIXACL;
1488 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1489 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1490 safe_mask |= 1 << REISERFS_ERROR_RO;
1491 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1492 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1493 safe_mask |= 1 << REISERFS_USRQUOTA;
1494 safe_mask |= 1 << REISERFS_GRPQUOTA;
1495
1496 /*
1497 * Update the bitmask, taking care to keep
1498 * the bits we're not allowed to change here
1499 */
1500 REISERFS_SB(s)->s_mount_opt =
1501 (REISERFS_SB(s)->
1502 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1503
1504 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1505 journal->j_max_commit_age = commit_max_age;
1506 journal->j_max_trans_age = commit_max_age;
1507 } else if (commit_max_age == 0) {
1508 /* 0 means restore defaults. */
1509 journal->j_max_commit_age = journal->j_default_max_commit_age;
1510 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1511 }
1512
1513 if (blocks) {
1514 err = reiserfs_resize(s, blocks);
1515 if (err != 0)
1516 goto out_err_unlock;
1517 }
1518
1519 if (*mount_flags & SB_RDONLY) {
1520 reiserfs_write_unlock(s);
1521 reiserfs_xattr_init(s, *mount_flags);
1522 /* remount read-only */
1523 if (sb_rdonly(s))
1524 /* it is read-only already */
1525 goto out_ok_unlocked;
1526
1527 err = dquot_suspend(s, -1);
1528 if (err < 0)
1529 goto out_err;
1530
1531 /* try to remount file system with read-only permissions */
1532 if (sb_umount_state(rs) == REISERFS_VALID_FS
1533 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1534 goto out_ok_unlocked;
1535 }
1536
1537 reiserfs_write_lock(s);
1538
1539 err = journal_begin(&th, s, 10);
1540 if (err)
1541 goto out_err_unlock;
1542
1543 /* Mounting a rw partition read-only. */
1544 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1545 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1546 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1547 } else {
1548 /* remount read-write */
1549 if (!sb_rdonly(s)) {
1550 reiserfs_write_unlock(s);
1551 reiserfs_xattr_init(s, *mount_flags);
1552 goto out_ok_unlocked; /* We are read-write already */
1553 }
1554
1555 if (reiserfs_is_journal_aborted(journal)) {
1556 err = journal->j_errno;
1557 goto out_err_unlock;
1558 }
1559
1560 handle_data_mode(s, mount_options);
1561 handle_barrier_mode(s, mount_options);
1562 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1563
1564 /* now it is safe to call journal_begin */
1565 s->s_flags &= ~SB_RDONLY;
1566 err = journal_begin(&th, s, 10);
1567 if (err)
1568 goto out_err_unlock;
1569
1570 /* Mount a partition which is read-only, read-write */
1571 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1572 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1573 s->s_flags &= ~SB_RDONLY;
1574 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1575 if (!old_format_only(s))
1576 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
1577 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1578 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
1579 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1580 }
1581 /* this will force a full flush of all journal lists */
1582 SB_JOURNAL(s)->j_must_wait = 1;
1583 err = journal_end(&th);
1584 if (err)
1585 goto out_err_unlock;
1586
1587 reiserfs_write_unlock(s);
1588 if (!(*mount_flags & SB_RDONLY)) {
1589 dquot_resume(s, -1);
1590 reiserfs_write_lock(s);
1591 finish_unfinished(s);
1592 reiserfs_write_unlock(s);
1593 reiserfs_xattr_init(s, *mount_flags);
1594 }
1595
1596 out_ok_unlocked:
1597 return 0;
1598
1599 out_err_unlock:
1600 reiserfs_write_unlock(s);
1601 out_err:
1602 kfree(new_opts);
1603 return err;
1604 }
1605
1606 static int read_super_block(struct super_block *s, int offset)
1607 {
1608 struct buffer_head *bh;
1609 struct reiserfs_super_block *rs;
1610 int fs_blocksize;
1611
1612 bh = sb_bread(s, offset / s->s_blocksize);
1613 if (!bh) {
1614 reiserfs_warning(s, "sh-2006",
1615 "bread failed (dev %s, block %lu, size %lu)",
1616 s->s_id, offset / s->s_blocksize,
1617 s->s_blocksize);
1618 return 1;
1619 }
1620
1621 rs = (struct reiserfs_super_block *)bh->b_data;
1622 if (!is_any_reiserfs_magic_string(rs)) {
1623 brelse(bh);
1624 return 1;
1625 }
1626 /*
1627 * ok, reiserfs signature (old or new) found in at the given offset
1628 */
1629 fs_blocksize = sb_blocksize(rs);
1630 brelse(bh);
1631 sb_set_blocksize(s, fs_blocksize);
1632
1633 bh = sb_bread(s, offset / s->s_blocksize);
1634 if (!bh) {
1635 reiserfs_warning(s, "sh-2007",
1636 "bread failed (dev %s, block %lu, size %lu)",
1637 s->s_id, offset / s->s_blocksize,
1638 s->s_blocksize);
1639 return 1;
1640 }
1641
1642 rs = (struct reiserfs_super_block *)bh->b_data;
1643 if (sb_blocksize(rs) != s->s_blocksize) {
1644 reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
1645 "filesystem on (dev %s, block %llu, size %lu)",
1646 s->s_id,
1647 (unsigned long long)bh->b_blocknr,
1648 s->s_blocksize);
1649 brelse(bh);
1650 return 1;
1651 }
1652
1653 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1654 brelse(bh);
1655 reiserfs_warning(s, "super-6519", "Unfinished reiserfsck "
1656 "--rebuild-tree run detected. Please run\n"
1657 "reiserfsck --rebuild-tree and wait for a "
1658 "completion. If that fails\n"
1659 "get newer reiserfsprogs package");
1660 return 1;
1661 }
1662
1663 SB_BUFFER_WITH_SB(s) = bh;
1664 SB_DISK_SUPER_BLOCK(s) = rs;
1665
1666 /*
1667 * magic is of non-standard journal filesystem, look at s_version to
1668 * find which format is in use
1669 */
1670 if (is_reiserfs_jr(rs)) {
1671 if (sb_version(rs) == REISERFS_VERSION_2)
1672 reiserfs_info(s, "found reiserfs format \"3.6\""
1673 " with non-standard journal\n");
1674 else if (sb_version(rs) == REISERFS_VERSION_1)
1675 reiserfs_info(s, "found reiserfs format \"3.5\""
1676 " with non-standard journal\n");
1677 else {
1678 reiserfs_warning(s, "sh-2012", "found unknown "
1679 "format \"%u\" of reiserfs with "
1680 "non-standard magic", sb_version(rs));
1681 return 1;
1682 }
1683 } else
1684 /*
1685 * s_version of standard format may contain incorrect
1686 * information, so we just look at the magic string
1687 */
1688 reiserfs_info(s,
1689 "found reiserfs format \"%s\" with standard journal\n",
1690 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1691
1692 s->s_op = &reiserfs_sops;
1693 s->s_export_op = &reiserfs_export_ops;
1694 #ifdef CONFIG_QUOTA
1695 s->s_qcop = &reiserfs_qctl_operations;
1696 s->dq_op = &reiserfs_quota_operations;
1697 s->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1698 #endif
1699
1700 /*
1701 * new format is limited by the 32 bit wide i_blocks field, want to
1702 * be one full block below that.
1703 */
1704 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1705 return 0;
1706 }
1707
1708 /* after journal replay, reread all bitmap and super blocks */
1709 static int reread_meta_blocks(struct super_block *s)
1710 {
1711 ll_rw_block(REQ_OP_READ, 0, 1, &SB_BUFFER_WITH_SB(s));
1712 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1713 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1714 reiserfs_warning(s, "reiserfs-2504", "error reading the super");
1715 return 1;
1716 }
1717
1718 return 0;
1719 }
1720
1721 /* hash detection stuff */
1722
1723 /*
1724 * if root directory is empty - we set default - Yura's - hash and
1725 * warn about it
1726 * FIXME: we look for only one name in a directory. If tea and yura
1727 * both have the same value - we ask user to send report to the
1728 * mailing list
1729 */
1730 static __u32 find_hash_out(struct super_block *s)
1731 {
1732 int retval;
1733 struct inode *inode;
1734 struct cpu_key key;
1735 INITIALIZE_PATH(path);
1736 struct reiserfs_dir_entry de;
1737 struct reiserfs_de_head *deh;
1738 __u32 hash = DEFAULT_HASH;
1739 __u32 deh_hashval, teahash, r5hash, yurahash;
1740
1741 inode = d_inode(s->s_root);
1742
1743 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1744 retval = search_by_entry_key(s, &key, &path, &de);
1745 if (retval == IO_ERROR) {
1746 pathrelse(&path);
1747 return UNSET_HASH;
1748 }
1749 if (retval == NAME_NOT_FOUND)
1750 de.de_entry_num--;
1751
1752 set_de_name_and_namelen(&de);
1753 deh = de.de_deh + de.de_entry_num;
1754
1755 if (deh_offset(deh) == DOT_DOT_OFFSET) {
1756 /* allow override in this case */
1757 if (reiserfs_rupasov_hash(s))
1758 hash = YURA_HASH;
1759 reiserfs_info(s, "FS seems to be empty, autodetect is using the default hash\n");
1760 goto out;
1761 }
1762
1763 deh_hashval = GET_HASH_VALUE(deh_offset(deh));
1764 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1765 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1766 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1767
1768 if ((teahash == r5hash && deh_hashval == r5hash) ||
1769 (teahash == yurahash && deh_hashval == yurahash) ||
1770 (r5hash == yurahash && deh_hashval == yurahash)) {
1771 reiserfs_warning(s, "reiserfs-2506",
1772 "Unable to automatically detect hash "
1773 "function. Please mount with -o "
1774 "hash={tea,rupasov,r5}");
1775 hash = UNSET_HASH;
1776 goto out;
1777 }
1778
1779 if (deh_hashval == yurahash)
1780 hash = YURA_HASH;
1781 else if (deh_hashval == teahash)
1782 hash = TEA_HASH;
1783 else if (deh_hashval == r5hash)
1784 hash = R5_HASH;
1785 else {
1786 reiserfs_warning(s, "reiserfs-2506",
1787 "Unrecognised hash function");
1788 hash = UNSET_HASH;
1789 }
1790 out:
1791 pathrelse(&path);
1792 return hash;
1793 }
1794
1795 /* finds out which hash names are sorted with */
1796 static int what_hash(struct super_block *s)
1797 {
1798 __u32 code;
1799
1800 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1801
1802 /*
1803 * reiserfs_hash_detect() == true if any of the hash mount options
1804 * were used. We must check them to make sure the user isn't
1805 * using a bad hash value
1806 */
1807 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1808 code = find_hash_out(s);
1809
1810 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1811 /*
1812 * detection has found the hash, and we must check against the
1813 * mount options
1814 */
1815 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1816 reiserfs_warning(s, "reiserfs-2507",
1817 "Error, %s hash detected, "
1818 "unable to force rupasov hash",
1819 reiserfs_hashname(code));
1820 code = UNSET_HASH;
1821 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1822 reiserfs_warning(s, "reiserfs-2508",
1823 "Error, %s hash detected, "
1824 "unable to force tea hash",
1825 reiserfs_hashname(code));
1826 code = UNSET_HASH;
1827 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1828 reiserfs_warning(s, "reiserfs-2509",
1829 "Error, %s hash detected, "
1830 "unable to force r5 hash",
1831 reiserfs_hashname(code));
1832 code = UNSET_HASH;
1833 }
1834 } else {
1835 /*
1836 * find_hash_out was not called or
1837 * could not determine the hash
1838 */
1839 if (reiserfs_rupasov_hash(s)) {
1840 code = YURA_HASH;
1841 } else if (reiserfs_tea_hash(s)) {
1842 code = TEA_HASH;
1843 } else if (reiserfs_r5_hash(s)) {
1844 code = R5_HASH;
1845 }
1846 }
1847
1848 /*
1849 * if we are mounted RW, and we have a new valid hash code, update
1850 * the super
1851 */
1852 if (code != UNSET_HASH &&
1853 !sb_rdonly(s) &&
1854 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1855 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1856 }
1857 return code;
1858 }
1859
1860 /* return pointer to appropriate function */
1861 static hashf_t hash_function(struct super_block *s)
1862 {
1863 switch (what_hash(s)) {
1864 case TEA_HASH:
1865 reiserfs_info(s, "Using tea hash to sort names\n");
1866 return keyed_hash;
1867 case YURA_HASH:
1868 reiserfs_info(s, "Using rupasov hash to sort names\n");
1869 return yura_hash;
1870 case R5_HASH:
1871 reiserfs_info(s, "Using r5 hash to sort names\n");
1872 return r5_hash;
1873 }
1874 return NULL;
1875 }
1876
1877 /* this is used to set up correct value for old partitions */
1878 static int function2code(hashf_t func)
1879 {
1880 if (func == keyed_hash)
1881 return TEA_HASH;
1882 if (func == yura_hash)
1883 return YURA_HASH;
1884 if (func == r5_hash)
1885 return R5_HASH;
1886
1887 BUG(); /* should never happen */
1888
1889 return 0;
1890 }
1891
1892 #define SWARN(silent, s, id, ...) \
1893 if (!(silent)) \
1894 reiserfs_warning(s, id, __VA_ARGS__)
1895
1896 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1897 {
1898 struct inode *root_inode;
1899 struct reiserfs_transaction_handle th;
1900 int old_format = 0;
1901 unsigned long blocks;
1902 unsigned int commit_max_age = 0;
1903 int jinit_done = 0;
1904 struct reiserfs_iget_args args;
1905 struct reiserfs_super_block *rs;
1906 char *jdev_name;
1907 struct reiserfs_sb_info *sbi;
1908 int errval = -EINVAL;
1909 char *qf_names[REISERFS_MAXQUOTAS] = {};
1910 unsigned int qfmt = 0;
1911
1912 sbi = kzalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1913 if (!sbi)
1914 return -ENOMEM;
1915 s->s_fs_info = sbi;
1916 /* Set default values for options: non-aggressive tails, RO on errors */
1917 sbi->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1918 sbi->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1919 sbi->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
1920 /* no preallocation minimum, be smart in reiserfs_file_write instead */
1921 sbi->s_alloc_options.preallocmin = 0;
1922 /* Preallocate by 16 blocks (17-1) at once */
1923 sbi->s_alloc_options.preallocsize = 17;
1924 /* setup default block allocator options */
1925 reiserfs_init_alloc_options(s);
1926
1927 spin_lock_init(&sbi->old_work_lock);
1928 INIT_DELAYED_WORK(&sbi->old_work, flush_old_commits);
1929 mutex_init(&sbi->lock);
1930 sbi->lock_depth = -1;
1931
1932 sbi->commit_wq = alloc_workqueue("reiserfs/%s", WQ_MEM_RECLAIM, 0,
1933 s->s_id);
1934 if (!sbi->commit_wq) {
1935 SWARN(silent, s, "", "Cannot allocate commit workqueue");
1936 errval = -ENOMEM;
1937 goto error_unlocked;
1938 }
1939
1940 jdev_name = NULL;
1941 if (reiserfs_parse_options
1942 (s, (char *)data, &sbi->s_mount_opt, &blocks, &jdev_name,
1943 &commit_max_age, qf_names, &qfmt) == 0) {
1944 goto error_unlocked;
1945 }
1946 if (jdev_name && jdev_name[0]) {
1947 sbi->s_jdev = kstrdup(jdev_name, GFP_KERNEL);
1948 if (!sbi->s_jdev) {
1949 SWARN(silent, s, "", "Cannot allocate memory for "
1950 "journal device name");
1951 goto error_unlocked;
1952 }
1953 }
1954 #ifdef CONFIG_QUOTA
1955 handle_quota_files(s, qf_names, &qfmt);
1956 #endif
1957
1958 if (blocks) {
1959 SWARN(silent, s, "jmacd-7", "resize option for remount only");
1960 goto error_unlocked;
1961 }
1962
1963 /*
1964 * try old format (undistributed bitmap, super block in 8-th 1k
1965 * block of a device)
1966 */
1967 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1968 old_format = 1;
1969
1970 /*
1971 * try new format (64-th 1k block), which can contain reiserfs
1972 * super block
1973 */
1974 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1975 SWARN(silent, s, "sh-2021", "can not find reiserfs on %s",
1976 s->s_id);
1977 goto error_unlocked;
1978 }
1979
1980 s->s_time_min = 0;
1981 s->s_time_max = U32_MAX;
1982
1983 rs = SB_DISK_SUPER_BLOCK(s);
1984 /*
1985 * Let's do basic sanity check to verify that underlying device is not
1986 * smaller than the filesystem. If the check fails then abort and
1987 * scream, because bad stuff will happen otherwise.
1988 */
1989 if (s->s_bdev && s->s_bdev->bd_inode
1990 && i_size_read(s->s_bdev->bd_inode) <
1991 sb_block_count(rs) * sb_blocksize(rs)) {
1992 SWARN(silent, s, "", "Filesystem cannot be "
1993 "mounted because it is bigger than the device");
1994 SWARN(silent, s, "", "You may need to run fsck "
1995 "or increase size of your LVM partition");
1996 SWARN(silent, s, "", "Or may be you forgot to "
1997 "reboot after fdisk when it told you to");
1998 goto error_unlocked;
1999 }
2000
2001 sbi->s_mount_state = SB_REISERFS_STATE(s);
2002 sbi->s_mount_state = REISERFS_VALID_FS;
2003
2004 if ((errval = reiserfs_init_bitmap_cache(s))) {
2005 SWARN(silent, s, "jmacd-8", "unable to read bitmap");
2006 goto error_unlocked;
2007 }
2008
2009 errval = -EINVAL;
2010 #ifdef CONFIG_REISERFS_CHECK
2011 SWARN(silent, s, "", "CONFIG_REISERFS_CHECK is set ON");
2012 SWARN(silent, s, "", "- it is slow mode for debugging.");
2013 #endif
2014
2015 /* make data=ordered the default */
2016 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
2017 !reiserfs_data_writeback(s)) {
2018 sbi->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
2019 }
2020
2021 if (reiserfs_data_log(s)) {
2022 reiserfs_info(s, "using journaled data mode\n");
2023 } else if (reiserfs_data_ordered(s)) {
2024 reiserfs_info(s, "using ordered data mode\n");
2025 } else {
2026 reiserfs_info(s, "using writeback data mode\n");
2027 }
2028 if (reiserfs_barrier_flush(s)) {
2029 printk("reiserfs: using flush barriers\n");
2030 }
2031
2032 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
2033 SWARN(silent, s, "sh-2022",
2034 "unable to initialize journal space");
2035 goto error_unlocked;
2036 } else {
2037 /*
2038 * once this is set, journal_release must be called
2039 * if we error out of the mount
2040 */
2041 jinit_done = 1;
2042 }
2043
2044 if (reread_meta_blocks(s)) {
2045 SWARN(silent, s, "jmacd-9",
2046 "unable to reread meta blocks after journal init");
2047 goto error_unlocked;
2048 }
2049
2050 if (replay_only(s))
2051 goto error_unlocked;
2052
2053 s->s_xattr = reiserfs_xattr_handlers;
2054
2055 if (bdev_read_only(s->s_bdev) && !sb_rdonly(s)) {
2056 SWARN(silent, s, "clm-7000",
2057 "Detected readonly device, marking FS readonly");
2058 s->s_flags |= SB_RDONLY;
2059 }
2060 args.objectid = REISERFS_ROOT_OBJECTID;
2061 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
2062 root_inode =
2063 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
2064 reiserfs_init_locked_inode, (void *)&args);
2065 if (!root_inode) {
2066 SWARN(silent, s, "jmacd-10", "get root inode failed");
2067 goto error_unlocked;
2068 }
2069
2070 /*
2071 * This path assumed to be called with the BKL in the old times.
2072 * Now we have inherited the big reiserfs lock from it and many
2073 * reiserfs helpers called in the mount path and elsewhere require
2074 * this lock to be held even if it's not always necessary. Let's be
2075 * conservative and hold it early. The window can be reduced after
2076 * careful review of the code.
2077 */
2078 reiserfs_write_lock(s);
2079
2080 if (root_inode->i_state & I_NEW) {
2081 reiserfs_read_locked_inode(root_inode, &args);
2082 unlock_new_inode(root_inode);
2083 }
2084
2085 s->s_root = d_make_root(root_inode);
2086 if (!s->s_root)
2087 goto error;
2088 /* define and initialize hash function */
2089 sbi->s_hash_function = hash_function(s);
2090 if (sbi->s_hash_function == NULL) {
2091 dput(s->s_root);
2092 s->s_root = NULL;
2093 goto error;
2094 }
2095
2096 if (is_reiserfs_3_5(rs)
2097 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
2098 set_bit(REISERFS_3_5, &sbi->s_properties);
2099 else if (old_format)
2100 set_bit(REISERFS_OLD_FORMAT, &sbi->s_properties);
2101 else
2102 set_bit(REISERFS_3_6, &sbi->s_properties);
2103
2104 if (!sb_rdonly(s)) {
2105
2106 errval = journal_begin(&th, s, 1);
2107 if (errval) {
2108 dput(s->s_root);
2109 s->s_root = NULL;
2110 goto error;
2111 }
2112 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
2113
2114 set_sb_umount_state(rs, REISERFS_ERROR_FS);
2115 set_sb_fs_state(rs, 0);
2116
2117 /*
2118 * Clear out s_bmap_nr if it would wrap. We can handle this
2119 * case, but older revisions can't. This will cause the
2120 * file system to fail mount on those older implementations,
2121 * avoiding corruption. -jeffm
2122 */
2123 if (bmap_would_wrap(reiserfs_bmap_count(s)) &&
2124 sb_bmap_nr(rs) != 0) {
2125 reiserfs_warning(s, "super-2030", "This file system "
2126 "claims to use %u bitmap blocks in "
2127 "its super block, but requires %u. "
2128 "Clearing to zero.", sb_bmap_nr(rs),
2129 reiserfs_bmap_count(s));
2130
2131 set_sb_bmap_nr(rs, 0);
2132 }
2133
2134 if (old_format_only(s)) {
2135 /*
2136 * filesystem of format 3.5 either with standard
2137 * or non-standard journal
2138 */
2139 if (convert_reiserfs(s)) {
2140 /* and -o conv is given */
2141 if (!silent)
2142 reiserfs_info(s,
2143 "converting 3.5 filesystem to the 3.6 format");
2144
2145 if (is_reiserfs_3_5(rs))
2146 /*
2147 * put magic string of 3.6 format.
2148 * 2.2 will not be able to
2149 * mount this filesystem anymore
2150 */
2151 memcpy(rs->s_v1.s_magic,
2152 reiserfs_3_6_magic_string,
2153 sizeof
2154 (reiserfs_3_6_magic_string));
2155
2156 set_sb_version(rs, REISERFS_VERSION_2);
2157 reiserfs_convert_objectid_map_v1(s);
2158 set_bit(REISERFS_3_6, &sbi->s_properties);
2159 clear_bit(REISERFS_3_5, &sbi->s_properties);
2160 } else if (!silent) {
2161 reiserfs_info(s, "using 3.5.x disk format\n");
2162 }
2163 } else
2164 set_sb_mnt_count(rs, sb_mnt_count(rs) + 1);
2165
2166
2167 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(s));
2168 errval = journal_end(&th);
2169 if (errval) {
2170 dput(s->s_root);
2171 s->s_root = NULL;
2172 goto error;
2173 }
2174
2175 reiserfs_write_unlock(s);
2176 if ((errval = reiserfs_lookup_privroot(s)) ||
2177 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2178 dput(s->s_root);
2179 s->s_root = NULL;
2180 goto error_unlocked;
2181 }
2182 reiserfs_write_lock(s);
2183
2184 /*
2185 * look for files which were to be removed in previous session
2186 */
2187 finish_unfinished(s);
2188 } else {
2189 if (old_format_only(s) && !silent) {
2190 reiserfs_info(s, "using 3.5.x disk format\n");
2191 }
2192
2193 reiserfs_write_unlock(s);
2194 if ((errval = reiserfs_lookup_privroot(s)) ||
2195 (errval = reiserfs_xattr_init(s, s->s_flags))) {
2196 dput(s->s_root);
2197 s->s_root = NULL;
2198 goto error_unlocked;
2199 }
2200 reiserfs_write_lock(s);
2201 }
2202 /*
2203 * mark hash in super block: it could be unset. overwrite should be ok
2204 */
2205 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
2206
2207 handle_attrs(s);
2208
2209 reiserfs_proc_info_init(s);
2210
2211 init_waitqueue_head(&(sbi->s_wait));
2212 spin_lock_init(&sbi->bitmap_lock);
2213
2214 reiserfs_write_unlock(s);
2215
2216 return (0);
2217
2218 error:
2219 reiserfs_write_unlock(s);
2220
2221 error_unlocked:
2222 /* kill the commit thread, free journal ram */
2223 if (jinit_done) {
2224 reiserfs_write_lock(s);
2225 journal_release_error(NULL, s);
2226 reiserfs_write_unlock(s);
2227 }
2228
2229 if (sbi->commit_wq)
2230 destroy_workqueue(sbi->commit_wq);
2231
2232 reiserfs_cancel_old_flush(s);
2233
2234 reiserfs_free_bitmap_cache(s);
2235 if (SB_BUFFER_WITH_SB(s))
2236 brelse(SB_BUFFER_WITH_SB(s));
2237 #ifdef CONFIG_QUOTA
2238 {
2239 int j;
2240 for (j = 0; j < REISERFS_MAXQUOTAS; j++)
2241 kfree(qf_names[j]);
2242 }
2243 #endif
2244 kfree(sbi->s_jdev);
2245 kfree(sbi);
2246
2247 s->s_fs_info = NULL;
2248 return errval;
2249 }
2250
2251 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
2252 {
2253 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
2254
2255 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
2256 buf->f_bfree = sb_free_blocks(rs);
2257 buf->f_bavail = buf->f_bfree;
2258 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
2259 buf->f_bsize = dentry->d_sb->s_blocksize;
2260 /* changed to accommodate gcc folks. */
2261 buf->f_type = REISERFS_SUPER_MAGIC;
2262 buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2);
2263 buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2,
2264 sizeof(rs->s_uuid)/2);
2265
2266 return 0;
2267 }
2268
2269 #ifdef CONFIG_QUOTA
2270 static int reiserfs_write_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_TRANS_BLOCKS(dquot->dq_sb));
2280 if (ret)
2281 goto out;
2282 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2283 ret = dquot_commit(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_acquire_dquot(struct dquot *dquot)
2294 {
2295 struct reiserfs_transaction_handle th;
2296 int ret, err;
2297 int depth;
2298
2299 reiserfs_write_lock(dquot->dq_sb);
2300 ret =
2301 journal_begin(&th, dquot->dq_sb,
2302 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2303 if (ret)
2304 goto out;
2305 depth = reiserfs_write_unlock_nested(dquot->dq_sb);
2306 ret = dquot_acquire(dquot);
2307 reiserfs_write_lock_nested(dquot->dq_sb, depth);
2308 err = journal_end(&th);
2309 if (!ret && err)
2310 ret = err;
2311 out:
2312 reiserfs_write_unlock(dquot->dq_sb);
2313 return ret;
2314 }
2315
2316 static int reiserfs_release_dquot(struct dquot *dquot)
2317 {
2318 struct reiserfs_transaction_handle th;
2319 int ret, err;
2320
2321 reiserfs_write_lock(dquot->dq_sb);
2322 ret =
2323 journal_begin(&th, dquot->dq_sb,
2324 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2325 reiserfs_write_unlock(dquot->dq_sb);
2326 if (ret) {
2327 /* Release dquot anyway to avoid endless cycle in dqput() */
2328 dquot_release(dquot);
2329 goto out;
2330 }
2331 ret = dquot_release(dquot);
2332 reiserfs_write_lock(dquot->dq_sb);
2333 err = journal_end(&th);
2334 if (!ret && err)
2335 ret = err;
2336 reiserfs_write_unlock(dquot->dq_sb);
2337 out:
2338 return ret;
2339 }
2340
2341 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2342 {
2343 /* Are we journaling quotas? */
2344 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2345 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2346 dquot_mark_dquot_dirty(dquot);
2347 return reiserfs_write_dquot(dquot);
2348 } else
2349 return dquot_mark_dquot_dirty(dquot);
2350 }
2351
2352 static int reiserfs_write_info(struct super_block *sb, int type)
2353 {
2354 struct reiserfs_transaction_handle th;
2355 int ret, err;
2356 int depth;
2357
2358 /* Data block + inode block */
2359 reiserfs_write_lock(sb);
2360 ret = journal_begin(&th, sb, 2);
2361 if (ret)
2362 goto out;
2363 depth = reiserfs_write_unlock_nested(sb);
2364 ret = dquot_commit_info(sb, type);
2365 reiserfs_write_lock_nested(sb, depth);
2366 err = journal_end(&th);
2367 if (!ret && err)
2368 ret = err;
2369 out:
2370 reiserfs_write_unlock(sb);
2371 return ret;
2372 }
2373
2374 /*
2375 * Turn on quotas during mount time - we need to find the quota file and such...
2376 */
2377 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2378 {
2379 return dquot_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2380 REISERFS_SB(sb)->s_jquota_fmt, type);
2381 }
2382
2383 /*
2384 * Standard function to be called on quota_on
2385 */
2386 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2387 const struct path *path)
2388 {
2389 int err;
2390 struct inode *inode;
2391 struct reiserfs_transaction_handle th;
2392 int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
2393
2394 reiserfs_write_lock(sb);
2395 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
2396 err = -EINVAL;
2397 goto out;
2398 }
2399
2400 /* Quotafile not on the same filesystem? */
2401 if (path->dentry->d_sb != sb) {
2402 err = -EXDEV;
2403 goto out;
2404 }
2405 inode = d_inode(path->dentry);
2406 /*
2407 * We must not pack tails for quota files on reiserfs for quota
2408 * IO to work
2409 */
2410 if (!(REISERFS_I(inode)->i_flags & i_nopack_mask)) {
2411 err = reiserfs_unpack(inode, NULL);
2412 if (err) {
2413 reiserfs_warning(sb, "super-6520",
2414 "Unpacking tail of quota file failed"
2415 " (%d). Cannot turn on quotas.", err);
2416 err = -EINVAL;
2417 goto out;
2418 }
2419 mark_inode_dirty(inode);
2420 }
2421 /* Journaling quota? */
2422 if (REISERFS_SB(sb)->s_qf_names[type]) {
2423 /* Quotafile not of fs root? */
2424 if (path->dentry->d_parent != sb->s_root)
2425 reiserfs_warning(sb, "super-6521",
2426 "Quota file not on filesystem root. "
2427 "Journalled quota will not work.");
2428 }
2429
2430 /*
2431 * When we journal data on quota file, we have to flush journal to see
2432 * all updates to the file when we bypass pagecache...
2433 */
2434 if (reiserfs_file_data_log(inode)) {
2435 /* Just start temporary transaction and finish it */
2436 err = journal_begin(&th, sb, 1);
2437 if (err)
2438 goto out;
2439 err = journal_end_sync(&th);
2440 if (err)
2441 goto out;
2442 }
2443 reiserfs_write_unlock(sb);
2444 err = dquot_quota_on(sb, type, format_id, path);
2445 if (!err) {
2446 inode_lock(inode);
2447 REISERFS_I(inode)->i_attrs |= REISERFS_IMMUTABLE_FL |
2448 REISERFS_NOATIME_FL;
2449 inode_set_flags(inode, S_IMMUTABLE | S_NOATIME,
2450 S_IMMUTABLE | S_NOATIME);
2451 inode_unlock(inode);
2452 mark_inode_dirty(inode);
2453 }
2454 return err;
2455 out:
2456 reiserfs_write_unlock(sb);
2457 return err;
2458 }
2459
2460 static int reiserfs_quota_off(struct super_block *sb, int type)
2461 {
2462 int err;
2463 struct inode *inode = sb_dqopt(sb)->files[type];
2464
2465 if (!inode || !igrab(inode))
2466 goto out;
2467
2468 err = dquot_quota_off(sb, type);
2469 if (err)
2470 goto out_put;
2471
2472 inode_lock(inode);
2473 REISERFS_I(inode)->i_attrs &= ~(REISERFS_IMMUTABLE_FL |
2474 REISERFS_NOATIME_FL);
2475 inode_set_flags(inode, 0, S_IMMUTABLE | S_NOATIME);
2476 inode_unlock(inode);
2477 mark_inode_dirty(inode);
2478 out_put:
2479 iput(inode);
2480 return err;
2481 out:
2482 return dquot_quota_off(sb, type);
2483 }
2484
2485 /*
2486 * Read data from quotafile - avoid pagecache and such because we cannot afford
2487 * acquiring the locks... As quota files are never truncated and quota code
2488 * itself serializes the operations (and no one else should touch the files)
2489 * we don't have to be afraid of races
2490 */
2491 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2492 size_t len, loff_t off)
2493 {
2494 struct inode *inode = sb_dqopt(sb)->files[type];
2495 unsigned long blk = off >> sb->s_blocksize_bits;
2496 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2497 size_t toread;
2498 struct buffer_head tmp_bh, *bh;
2499 loff_t i_size = i_size_read(inode);
2500
2501 if (off > i_size)
2502 return 0;
2503 if (off + len > i_size)
2504 len = i_size - off;
2505 toread = len;
2506 while (toread > 0) {
2507 tocopy =
2508 sb->s_blocksize - offset <
2509 toread ? sb->s_blocksize - offset : toread;
2510 tmp_bh.b_state = 0;
2511 /*
2512 * Quota files are without tails so we can safely
2513 * use this function
2514 */
2515 reiserfs_write_lock(sb);
2516 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2517 reiserfs_write_unlock(sb);
2518 if (err)
2519 return err;
2520 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2521 memset(data, 0, tocopy);
2522 else {
2523 bh = sb_bread(sb, tmp_bh.b_blocknr);
2524 if (!bh)
2525 return -EIO;
2526 memcpy(data, bh->b_data + offset, tocopy);
2527 brelse(bh);
2528 }
2529 offset = 0;
2530 toread -= tocopy;
2531 data += tocopy;
2532 blk++;
2533 }
2534 return len;
2535 }
2536
2537 /*
2538 * Write to quotafile (we know the transaction is already started and has
2539 * enough credits)
2540 */
2541 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2542 const char *data, size_t len, loff_t off)
2543 {
2544 struct inode *inode = sb_dqopt(sb)->files[type];
2545 unsigned long blk = off >> sb->s_blocksize_bits;
2546 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2547 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2548 size_t towrite = len;
2549 struct buffer_head tmp_bh, *bh;
2550
2551 if (!current->journal_info) {
2552 printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
2553 (unsigned long long)off, (unsigned long long)len);
2554 return -EIO;
2555 }
2556 while (towrite > 0) {
2557 tocopy = sb->s_blocksize - offset < towrite ?
2558 sb->s_blocksize - offset : towrite;
2559 tmp_bh.b_state = 0;
2560 reiserfs_write_lock(sb);
2561 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2562 reiserfs_write_unlock(sb);
2563 if (err)
2564 goto out;
2565 if (offset || tocopy != sb->s_blocksize)
2566 bh = sb_bread(sb, tmp_bh.b_blocknr);
2567 else
2568 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2569 if (!bh) {
2570 err = -EIO;
2571 goto out;
2572 }
2573 lock_buffer(bh);
2574 memcpy(bh->b_data + offset, data, tocopy);
2575 flush_dcache_page(bh->b_page);
2576 set_buffer_uptodate(bh);
2577 unlock_buffer(bh);
2578 reiserfs_write_lock(sb);
2579 reiserfs_prepare_for_journal(sb, bh, 1);
2580 journal_mark_dirty(current->journal_info, bh);
2581 if (!journal_quota)
2582 reiserfs_add_ordered_list(inode, bh);
2583 reiserfs_write_unlock(sb);
2584 brelse(bh);
2585 offset = 0;
2586 towrite -= tocopy;
2587 data += tocopy;
2588 blk++;
2589 }
2590 out:
2591 if (len == towrite)
2592 return err;
2593 if (inode->i_size < off + len - towrite)
2594 i_size_write(inode, off + len - towrite);
2595 inode->i_mtime = inode->i_ctime = current_time(inode);
2596 mark_inode_dirty(inode);
2597 return len - towrite;
2598 }
2599
2600 #endif
2601
2602 static struct dentry *get_super_block(struct file_system_type *fs_type,
2603 int flags, const char *dev_name,
2604 void *data)
2605 {
2606 return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
2607 }
2608
2609 static int __init init_reiserfs_fs(void)
2610 {
2611 int ret;
2612
2613 ret = init_inodecache();
2614 if (ret)
2615 return ret;
2616
2617 reiserfs_proc_info_global_init();
2618
2619 ret = register_filesystem(&reiserfs_fs_type);
2620 if (ret)
2621 goto out;
2622
2623 return 0;
2624 out:
2625 reiserfs_proc_info_global_done();
2626 destroy_inodecache();
2627
2628 return ret;
2629 }
2630
2631 static void __exit exit_reiserfs_fs(void)
2632 {
2633 reiserfs_proc_info_global_done();
2634 unregister_filesystem(&reiserfs_fs_type);
2635 destroy_inodecache();
2636 }
2637
2638 struct file_system_type reiserfs_fs_type = {
2639 .owner = THIS_MODULE,
2640 .name = "reiserfs",
2641 .mount = get_super_block,
2642 .kill_sb = reiserfs_kill_sb,
2643 .fs_flags = FS_REQUIRES_DEV,
2644 };
2645 MODULE_ALIAS_FS("reiserfs");
2646
2647 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2648 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2649 MODULE_LICENSE("GPL");
2650
2651 module_init(init_reiserfs_fs);
2652 module_exit(exit_reiserfs_fs);
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