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