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