This source file includes following definitions.
- init_journal_hash
- reiserfs_clean_and_file_buffer
- allocate_bitmap_node
- get_bitmap_node
- free_bitmap_node
- allocate_bitmap_nodes
- set_bit_in_list_bitmap
- cleanup_bitmap_list
- free_list_bitmaps
- free_bitmap_nodes
- reiserfs_allocate_list_bitmaps
- get_list_bitmap
- allocate_cnodes
- get_cnode
- free_cnode
- clear_prepared_bits
- get_journal_hash_dev
- reiserfs_in_journal
- insert_journal_hash
- lock_journal
- unlock_journal
- get_journal_list
- put_journal_list
- cleanup_freed_for_journal_list
- journal_list_still_alive
- release_buffer_page
- reiserfs_end_buffer_io_sync
- reiserfs_end_ordered_io
- submit_logged_buffer
- submit_ordered_buffer
- write_chunk
- write_ordered_chunk
- add_to_chunk
- alloc_jh
- reiserfs_free_jh
- __add_jh
- reiserfs_add_tail_list
- reiserfs_add_ordered_list
- write_ordered_buffers
- flush_older_commits
- reiserfs_async_progress_wait
- flush_commit_list
- find_newer_jl_for_cn
- remove_all_from_journal_list
- _update_journal_header_block
- update_journal_header_block
- flush_older_journal_lists
- del_from_work_list
- flush_journal_list
- write_one_transaction
- dirty_one_transaction
- kupdate_transactions
- flush_used_journal_lists
- remove_journal_hash
- free_journal_ram
- do_journal_release
- journal_release
- journal_release_error
- journal_compare_desc_commit
- journal_transaction_is_valid
- brelse_array
- journal_read_transaction
- reiserfs_breada
- journal_read
- alloc_journal_list
- journal_list_init
- release_journal_dev
- journal_init_dev
- check_advise_trans_params
- journal_init
- journal_transaction_should_end
- reiserfs_block_writes
- reiserfs_allow_writes
- reiserfs_wait_on_write_block
- queue_log_writer
- wake_queued_writers
- let_transaction_grow
- do_journal_begin_r
- reiserfs_persistent_transaction
- reiserfs_end_persistent_transaction
- journal_join
- journal_join_abort
- journal_begin
- journal_mark_dirty
- journal_end
- remove_from_transaction
- can_dirty
- journal_end_sync
- flush_async_commits
- reiserfs_flush_old_commits
- check_journal_end
- journal_mark_freed
- reiserfs_update_inode_transaction
- __commit_trans_jl
- reiserfs_commit_for_inode
- reiserfs_restore_prepared_buffer
- reiserfs_prepare_for_journal
- do_journal_end
- reiserfs_abort_journal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38 #include <linux/time.h>
39 #include <linux/semaphore.h>
40 #include <linux/vmalloc.h>
41 #include "reiserfs.h"
42 #include <linux/kernel.h>
43 #include <linux/errno.h>
44 #include <linux/fcntl.h>
45 #include <linux/stat.h>
46 #include <linux/string.h>
47 #include <linux/buffer_head.h>
48 #include <linux/workqueue.h>
49 #include <linux/writeback.h>
50 #include <linux/blkdev.h>
51 #include <linux/backing-dev.h>
52 #include <linux/uaccess.h>
53 #include <linux/slab.h>
54
55
56
57 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
58 j_list))
59 #define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
60 j_working_list))
61
62
63 #define JOURNAL_TRANS_HALF 1018
64 #define BUFNR 64
65
66
67
68
69 #define BLOCK_FREED 2
70
71 #define BLOCK_FREED_HOLDER 3
72
73
74 #define BLOCK_NEEDS_FLUSH 4
75 #define BLOCK_DIRTIED 5
76
77
78 #define LIST_TOUCHED 1
79 #define LIST_DIRTY 2
80 #define LIST_COMMIT_PENDING 4
81
82
83 #define FLUSH_ALL 1
84 #define COMMIT_NOW 2
85 #define WAIT 4
86
87 static int do_journal_end(struct reiserfs_transaction_handle *, int flags);
88 static int flush_journal_list(struct super_block *s,
89 struct reiserfs_journal_list *jl, int flushall);
90 static int flush_commit_list(struct super_block *s,
91 struct reiserfs_journal_list *jl, int flushall);
92 static int can_dirty(struct reiserfs_journal_cnode *cn);
93 static int journal_join(struct reiserfs_transaction_handle *th,
94 struct super_block *sb);
95 static void release_journal_dev(struct super_block *super,
96 struct reiserfs_journal *journal);
97 static void dirty_one_transaction(struct super_block *s,
98 struct reiserfs_journal_list *jl);
99 static void flush_async_commits(struct work_struct *work);
100 static void queue_log_writer(struct super_block *s);
101
102
103 enum {
104 JBEGIN_REG = 0,
105
106 JBEGIN_JOIN = 1,
107
108 JBEGIN_ABORT = 2,
109 };
110
111 static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
112 struct super_block *sb,
113 unsigned long nblocks, int join);
114
115 static void init_journal_hash(struct super_block *sb)
116 {
117 struct reiserfs_journal *journal = SB_JOURNAL(sb);
118 memset(journal->j_hash_table, 0,
119 JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
120 }
121
122
123
124
125
126
127
128 static int reiserfs_clean_and_file_buffer(struct buffer_head *bh)
129 {
130 if (bh) {
131 clear_buffer_dirty(bh);
132 clear_buffer_journal_test(bh);
133 }
134 return 0;
135 }
136
137 static struct reiserfs_bitmap_node *allocate_bitmap_node(struct super_block
138 *sb)
139 {
140 struct reiserfs_bitmap_node *bn;
141 static int id;
142
143 bn = kmalloc(sizeof(struct reiserfs_bitmap_node), GFP_NOFS);
144 if (!bn) {
145 return NULL;
146 }
147 bn->data = kzalloc(sb->s_blocksize, GFP_NOFS);
148 if (!bn->data) {
149 kfree(bn);
150 return NULL;
151 }
152 bn->id = id++;
153 INIT_LIST_HEAD(&bn->list);
154 return bn;
155 }
156
157 static struct reiserfs_bitmap_node *get_bitmap_node(struct super_block *sb)
158 {
159 struct reiserfs_journal *journal = SB_JOURNAL(sb);
160 struct reiserfs_bitmap_node *bn = NULL;
161 struct list_head *entry = journal->j_bitmap_nodes.next;
162
163 journal->j_used_bitmap_nodes++;
164 repeat:
165
166 if (entry != &journal->j_bitmap_nodes) {
167 bn = list_entry(entry, struct reiserfs_bitmap_node, list);
168 list_del(entry);
169 memset(bn->data, 0, sb->s_blocksize);
170 journal->j_free_bitmap_nodes--;
171 return bn;
172 }
173 bn = allocate_bitmap_node(sb);
174 if (!bn) {
175 yield();
176 goto repeat;
177 }
178 return bn;
179 }
180 static inline void free_bitmap_node(struct super_block *sb,
181 struct reiserfs_bitmap_node *bn)
182 {
183 struct reiserfs_journal *journal = SB_JOURNAL(sb);
184 journal->j_used_bitmap_nodes--;
185 if (journal->j_free_bitmap_nodes > REISERFS_MAX_BITMAP_NODES) {
186 kfree(bn->data);
187 kfree(bn);
188 } else {
189 list_add(&bn->list, &journal->j_bitmap_nodes);
190 journal->j_free_bitmap_nodes++;
191 }
192 }
193
194 static void allocate_bitmap_nodes(struct super_block *sb)
195 {
196 int i;
197 struct reiserfs_journal *journal = SB_JOURNAL(sb);
198 struct reiserfs_bitmap_node *bn = NULL;
199 for (i = 0; i < REISERFS_MIN_BITMAP_NODES; i++) {
200 bn = allocate_bitmap_node(sb);
201 if (bn) {
202 list_add(&bn->list, &journal->j_bitmap_nodes);
203 journal->j_free_bitmap_nodes++;
204 } else {
205
206 break;
207 }
208 }
209 }
210
211 static int set_bit_in_list_bitmap(struct super_block *sb,
212 b_blocknr_t block,
213 struct reiserfs_list_bitmap *jb)
214 {
215 unsigned int bmap_nr = block / (sb->s_blocksize << 3);
216 unsigned int bit_nr = block % (sb->s_blocksize << 3);
217
218 if (!jb->bitmaps[bmap_nr]) {
219 jb->bitmaps[bmap_nr] = get_bitmap_node(sb);
220 }
221 set_bit(bit_nr, (unsigned long *)jb->bitmaps[bmap_nr]->data);
222 return 0;
223 }
224
225 static void cleanup_bitmap_list(struct super_block *sb,
226 struct reiserfs_list_bitmap *jb)
227 {
228 int i;
229 if (jb->bitmaps == NULL)
230 return;
231
232 for (i = 0; i < reiserfs_bmap_count(sb); i++) {
233 if (jb->bitmaps[i]) {
234 free_bitmap_node(sb, jb->bitmaps[i]);
235 jb->bitmaps[i] = NULL;
236 }
237 }
238 }
239
240
241
242
243 static int free_list_bitmaps(struct super_block *sb,
244 struct reiserfs_list_bitmap *jb_array)
245 {
246 int i;
247 struct reiserfs_list_bitmap *jb;
248 for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
249 jb = jb_array + i;
250 jb->journal_list = NULL;
251 cleanup_bitmap_list(sb, jb);
252 vfree(jb->bitmaps);
253 jb->bitmaps = NULL;
254 }
255 return 0;
256 }
257
258 static int free_bitmap_nodes(struct super_block *sb)
259 {
260 struct reiserfs_journal *journal = SB_JOURNAL(sb);
261 struct list_head *next = journal->j_bitmap_nodes.next;
262 struct reiserfs_bitmap_node *bn;
263
264 while (next != &journal->j_bitmap_nodes) {
265 bn = list_entry(next, struct reiserfs_bitmap_node, list);
266 list_del(next);
267 kfree(bn->data);
268 kfree(bn);
269 next = journal->j_bitmap_nodes.next;
270 journal->j_free_bitmap_nodes--;
271 }
272
273 return 0;
274 }
275
276
277
278
279
280 int reiserfs_allocate_list_bitmaps(struct super_block *sb,
281 struct reiserfs_list_bitmap *jb_array,
282 unsigned int bmap_nr)
283 {
284 int i;
285 int failed = 0;
286 struct reiserfs_list_bitmap *jb;
287 int mem = bmap_nr * sizeof(struct reiserfs_bitmap_node *);
288
289 for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
290 jb = jb_array + i;
291 jb->journal_list = NULL;
292 jb->bitmaps = vzalloc(mem);
293 if (!jb->bitmaps) {
294 reiserfs_warning(sb, "clm-2000", "unable to "
295 "allocate bitmaps for journal lists");
296 failed = 1;
297 break;
298 }
299 }
300 if (failed) {
301 free_list_bitmaps(sb, jb_array);
302 return -1;
303 }
304 return 0;
305 }
306
307
308
309
310
311 static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb,
312 struct reiserfs_journal_list
313 *jl)
314 {
315 int i, j;
316 struct reiserfs_journal *journal = SB_JOURNAL(sb);
317 struct reiserfs_list_bitmap *jb = NULL;
318
319 for (j = 0; j < (JOURNAL_NUM_BITMAPS * 3); j++) {
320 i = journal->j_list_bitmap_index;
321 journal->j_list_bitmap_index = (i + 1) % JOURNAL_NUM_BITMAPS;
322 jb = journal->j_list_bitmap + i;
323 if (journal->j_list_bitmap[i].journal_list) {
324 flush_commit_list(sb,
325 journal->j_list_bitmap[i].
326 journal_list, 1);
327 if (!journal->j_list_bitmap[i].journal_list) {
328 break;
329 }
330 } else {
331 break;
332 }
333 }
334
335 if (jb->journal_list)
336 return NULL;
337 jb->journal_list = jl;
338 return jb;
339 }
340
341
342
343
344
345
346 static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes)
347 {
348 struct reiserfs_journal_cnode *head;
349 int i;
350 if (num_cnodes <= 0) {
351 return NULL;
352 }
353 head = vzalloc(array_size(num_cnodes,
354 sizeof(struct reiserfs_journal_cnode)));
355 if (!head) {
356 return NULL;
357 }
358 head[0].prev = NULL;
359 head[0].next = head + 1;
360 for (i = 1; i < num_cnodes; i++) {
361 head[i].prev = head + (i - 1);
362 head[i].next = head + (i + 1);
363 }
364 head[num_cnodes - 1].next = NULL;
365 return head;
366 }
367
368
369 static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb)
370 {
371 struct reiserfs_journal_cnode *cn;
372 struct reiserfs_journal *journal = SB_JOURNAL(sb);
373
374 reiserfs_check_lock_depth(sb, "get_cnode");
375
376 if (journal->j_cnode_free <= 0) {
377 return NULL;
378 }
379 journal->j_cnode_used++;
380 journal->j_cnode_free--;
381 cn = journal->j_cnode_free_list;
382 if (!cn) {
383 return cn;
384 }
385 if (cn->next) {
386 cn->next->prev = NULL;
387 }
388 journal->j_cnode_free_list = cn->next;
389 memset(cn, 0, sizeof(struct reiserfs_journal_cnode));
390 return cn;
391 }
392
393
394
395
396 static void free_cnode(struct super_block *sb,
397 struct reiserfs_journal_cnode *cn)
398 {
399 struct reiserfs_journal *journal = SB_JOURNAL(sb);
400
401 reiserfs_check_lock_depth(sb, "free_cnode");
402
403 journal->j_cnode_used--;
404 journal->j_cnode_free++;
405
406 cn->next = journal->j_cnode_free_list;
407 if (journal->j_cnode_free_list) {
408 journal->j_cnode_free_list->prev = cn;
409 }
410 cn->prev = NULL;
411 journal->j_cnode_free_list = cn;
412 }
413
414 static void clear_prepared_bits(struct buffer_head *bh)
415 {
416 clear_buffer_journal_prepared(bh);
417 clear_buffer_journal_restore_dirty(bh);
418 }
419
420
421
422
423
424 static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct
425 super_block
426 *sb,
427 struct
428 reiserfs_journal_cnode
429 **table,
430 long bl)
431 {
432 struct reiserfs_journal_cnode *cn;
433 cn = journal_hash(table, sb, bl);
434 while (cn) {
435 if (cn->blocknr == bl && cn->sb == sb)
436 return cn;
437 cn = cn->hnext;
438 }
439 return (struct reiserfs_journal_cnode *)0;
440 }
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461 int reiserfs_in_journal(struct super_block *sb,
462 unsigned int bmap_nr, int bit_nr, int search_all,
463 b_blocknr_t * next_zero_bit)
464 {
465 struct reiserfs_journal *journal = SB_JOURNAL(sb);
466 struct reiserfs_journal_cnode *cn;
467 struct reiserfs_list_bitmap *jb;
468 int i;
469 unsigned long bl;
470
471 *next_zero_bit = 0;
472
473 PROC_INFO_INC(sb, journal.in_journal);
474
475
476
477
478
479
480 if (search_all) {
481 for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
482 PROC_INFO_INC(sb, journal.in_journal_bitmap);
483 jb = journal->j_list_bitmap + i;
484 if (jb->journal_list && jb->bitmaps[bmap_nr] &&
485 test_bit(bit_nr,
486 (unsigned long *)jb->bitmaps[bmap_nr]->
487 data)) {
488 *next_zero_bit =
489 find_next_zero_bit((unsigned long *)
490 (jb->bitmaps[bmap_nr]->
491 data),
492 sb->s_blocksize << 3,
493 bit_nr + 1);
494 return 1;
495 }
496 }
497 }
498
499 bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr;
500
501 if (search_all
502 && (cn =
503 get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) {
504 return 1;
505 }
506
507
508 if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) {
509 BUG();
510 return 1;
511 }
512
513 PROC_INFO_INC(sb, journal.in_journal_reusable);
514
515 return 0;
516 }
517
518
519 static inline void insert_journal_hash(struct reiserfs_journal_cnode **table,
520 struct reiserfs_journal_cnode *cn)
521 {
522 struct reiserfs_journal_cnode *cn_orig;
523
524 cn_orig = journal_hash(table, cn->sb, cn->blocknr);
525 cn->hnext = cn_orig;
526 cn->hprev = NULL;
527 if (cn_orig) {
528 cn_orig->hprev = cn;
529 }
530 journal_hash(table, cn->sb, cn->blocknr) = cn;
531 }
532
533
534 static inline void lock_journal(struct super_block *sb)
535 {
536 PROC_INFO_INC(sb, journal.lock_journal);
537
538 reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb);
539 }
540
541
542 static inline void unlock_journal(struct super_block *sb)
543 {
544 mutex_unlock(&SB_JOURNAL(sb)->j_mutex);
545 }
546
547 static inline void get_journal_list(struct reiserfs_journal_list *jl)
548 {
549 jl->j_refcount++;
550 }
551
552 static inline void put_journal_list(struct super_block *s,
553 struct reiserfs_journal_list *jl)
554 {
555 if (jl->j_refcount < 1) {
556 reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d",
557 jl->j_trans_id, jl->j_refcount);
558 }
559 if (--jl->j_refcount == 0)
560 kfree(jl);
561 }
562
563
564
565
566
567
568 static void cleanup_freed_for_journal_list(struct super_block *sb,
569 struct reiserfs_journal_list *jl)
570 {
571
572 struct reiserfs_list_bitmap *jb = jl->j_list_bitmap;
573 if (jb) {
574 cleanup_bitmap_list(sb, jb);
575 }
576 jl->j_list_bitmap->journal_list = NULL;
577 jl->j_list_bitmap = NULL;
578 }
579
580 static int journal_list_still_alive(struct super_block *s,
581 unsigned int trans_id)
582 {
583 struct reiserfs_journal *journal = SB_JOURNAL(s);
584 struct list_head *entry = &journal->j_journal_list;
585 struct reiserfs_journal_list *jl;
586
587 if (!list_empty(entry)) {
588 jl = JOURNAL_LIST_ENTRY(entry->next);
589 if (jl->j_trans_id <= trans_id) {
590 return 1;
591 }
592 }
593 return 0;
594 }
595
596
597
598
599
600
601
602
603
604
605
606 static void release_buffer_page(struct buffer_head *bh)
607 {
608 struct page *page = bh->b_page;
609 if (!page->mapping && trylock_page(page)) {
610 get_page(page);
611 put_bh(bh);
612 if (!page->mapping)
613 try_to_free_buffers(page);
614 unlock_page(page);
615 put_page(page);
616 } else {
617 put_bh(bh);
618 }
619 }
620
621 static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate)
622 {
623 if (buffer_journaled(bh)) {
624 reiserfs_warning(NULL, "clm-2084",
625 "pinned buffer %lu:%pg sent to disk",
626 bh->b_blocknr, bh->b_bdev);
627 }
628 if (uptodate)
629 set_buffer_uptodate(bh);
630 else
631 clear_buffer_uptodate(bh);
632
633 unlock_buffer(bh);
634 release_buffer_page(bh);
635 }
636
637 static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate)
638 {
639 if (uptodate)
640 set_buffer_uptodate(bh);
641 else
642 clear_buffer_uptodate(bh);
643 unlock_buffer(bh);
644 put_bh(bh);
645 }
646
647 static void submit_logged_buffer(struct buffer_head *bh)
648 {
649 get_bh(bh);
650 bh->b_end_io = reiserfs_end_buffer_io_sync;
651 clear_buffer_journal_new(bh);
652 clear_buffer_dirty(bh);
653 if (!test_clear_buffer_journal_test(bh))
654 BUG();
655 if (!buffer_uptodate(bh))
656 BUG();
657 submit_bh(REQ_OP_WRITE, 0, bh);
658 }
659
660 static void submit_ordered_buffer(struct buffer_head *bh)
661 {
662 get_bh(bh);
663 bh->b_end_io = reiserfs_end_ordered_io;
664 clear_buffer_dirty(bh);
665 if (!buffer_uptodate(bh))
666 BUG();
667 submit_bh(REQ_OP_WRITE, 0, bh);
668 }
669
670 #define CHUNK_SIZE 32
671 struct buffer_chunk {
672 struct buffer_head *bh[CHUNK_SIZE];
673 int nr;
674 };
675
676 static void write_chunk(struct buffer_chunk *chunk)
677 {
678 int i;
679 for (i = 0; i < chunk->nr; i++) {
680 submit_logged_buffer(chunk->bh[i]);
681 }
682 chunk->nr = 0;
683 }
684
685 static void write_ordered_chunk(struct buffer_chunk *chunk)
686 {
687 int i;
688 for (i = 0; i < chunk->nr; i++) {
689 submit_ordered_buffer(chunk->bh[i]);
690 }
691 chunk->nr = 0;
692 }
693
694 static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh,
695 spinlock_t * lock, void (fn) (struct buffer_chunk *))
696 {
697 int ret = 0;
698 BUG_ON(chunk->nr >= CHUNK_SIZE);
699 chunk->bh[chunk->nr++] = bh;
700 if (chunk->nr >= CHUNK_SIZE) {
701 ret = 1;
702 if (lock) {
703 spin_unlock(lock);
704 fn(chunk);
705 spin_lock(lock);
706 } else {
707 fn(chunk);
708 }
709 }
710 return ret;
711 }
712
713 static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0);
714 static struct reiserfs_jh *alloc_jh(void)
715 {
716 struct reiserfs_jh *jh;
717 while (1) {
718 jh = kmalloc(sizeof(*jh), GFP_NOFS);
719 if (jh) {
720 atomic_inc(&nr_reiserfs_jh);
721 return jh;
722 }
723 yield();
724 }
725 }
726
727
728
729
730
731 void reiserfs_free_jh(struct buffer_head *bh)
732 {
733 struct reiserfs_jh *jh;
734
735 jh = bh->b_private;
736 if (jh) {
737 bh->b_private = NULL;
738 jh->bh = NULL;
739 list_del_init(&jh->list);
740 kfree(jh);
741 if (atomic_read(&nr_reiserfs_jh) <= 0)
742 BUG();
743 atomic_dec(&nr_reiserfs_jh);
744 put_bh(bh);
745 }
746 }
747
748 static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh,
749 int tail)
750 {
751 struct reiserfs_jh *jh;
752
753 if (bh->b_private) {
754 spin_lock(&j->j_dirty_buffers_lock);
755 if (!bh->b_private) {
756 spin_unlock(&j->j_dirty_buffers_lock);
757 goto no_jh;
758 }
759 jh = bh->b_private;
760 list_del_init(&jh->list);
761 } else {
762 no_jh:
763 get_bh(bh);
764 jh = alloc_jh();
765 spin_lock(&j->j_dirty_buffers_lock);
766
767
768
769
770 BUG_ON(bh->b_private);
771 jh->bh = bh;
772 bh->b_private = jh;
773 }
774 jh->jl = j->j_current_jl;
775 if (tail)
776 list_add_tail(&jh->list, &jh->jl->j_tail_bh_list);
777 else {
778 list_add_tail(&jh->list, &jh->jl->j_bh_list);
779 }
780 spin_unlock(&j->j_dirty_buffers_lock);
781 return 0;
782 }
783
784 int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh)
785 {
786 return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1);
787 }
788 int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh)
789 {
790 return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0);
791 }
792
793 #define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
794 static int write_ordered_buffers(spinlock_t * lock,
795 struct reiserfs_journal *j,
796 struct reiserfs_journal_list *jl,
797 struct list_head *list)
798 {
799 struct buffer_head *bh;
800 struct reiserfs_jh *jh;
801 int ret = j->j_errno;
802 struct buffer_chunk chunk;
803 struct list_head tmp;
804 INIT_LIST_HEAD(&tmp);
805
806 chunk.nr = 0;
807 spin_lock(lock);
808 while (!list_empty(list)) {
809 jh = JH_ENTRY(list->next);
810 bh = jh->bh;
811 get_bh(bh);
812 if (!trylock_buffer(bh)) {
813 if (!buffer_dirty(bh)) {
814 list_move(&jh->list, &tmp);
815 goto loop_next;
816 }
817 spin_unlock(lock);
818 if (chunk.nr)
819 write_ordered_chunk(&chunk);
820 wait_on_buffer(bh);
821 cond_resched();
822 spin_lock(lock);
823 goto loop_next;
824 }
825
826
827
828
829
830 if (!buffer_uptodate(bh) && buffer_dirty(bh)) {
831 clear_buffer_dirty(bh);
832 ret = -EIO;
833 }
834 if (buffer_dirty(bh)) {
835 list_move(&jh->list, &tmp);
836 add_to_chunk(&chunk, bh, lock, write_ordered_chunk);
837 } else {
838 reiserfs_free_jh(bh);
839 unlock_buffer(bh);
840 }
841 loop_next:
842 put_bh(bh);
843 cond_resched_lock(lock);
844 }
845 if (chunk.nr) {
846 spin_unlock(lock);
847 write_ordered_chunk(&chunk);
848 spin_lock(lock);
849 }
850 while (!list_empty(&tmp)) {
851 jh = JH_ENTRY(tmp.prev);
852 bh = jh->bh;
853 get_bh(bh);
854 reiserfs_free_jh(bh);
855
856 if (buffer_locked(bh)) {
857 spin_unlock(lock);
858 wait_on_buffer(bh);
859 spin_lock(lock);
860 }
861 if (!buffer_uptodate(bh)) {
862 ret = -EIO;
863 }
864
865
866
867
868
869
870
871
872
873 if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) {
874 spin_unlock(lock);
875 ll_rw_block(REQ_OP_WRITE, 0, 1, &bh);
876 spin_lock(lock);
877 }
878 put_bh(bh);
879 cond_resched_lock(lock);
880 }
881 spin_unlock(lock);
882 return ret;
883 }
884
885 static int flush_older_commits(struct super_block *s,
886 struct reiserfs_journal_list *jl)
887 {
888 struct reiserfs_journal *journal = SB_JOURNAL(s);
889 struct reiserfs_journal_list *other_jl;
890 struct reiserfs_journal_list *first_jl;
891 struct list_head *entry;
892 unsigned int trans_id = jl->j_trans_id;
893 unsigned int other_trans_id;
894
895 find_first:
896
897
898
899 first_jl = jl;
900 entry = jl->j_list.prev;
901 while (1) {
902 other_jl = JOURNAL_LIST_ENTRY(entry);
903 if (entry == &journal->j_journal_list ||
904 atomic_read(&other_jl->j_older_commits_done))
905 break;
906
907 first_jl = other_jl;
908 entry = other_jl->j_list.prev;
909 }
910
911
912 if (first_jl == jl) {
913 return 0;
914 }
915
916 entry = &first_jl->j_list;
917 while (1) {
918 other_jl = JOURNAL_LIST_ENTRY(entry);
919 other_trans_id = other_jl->j_trans_id;
920
921 if (other_trans_id < trans_id) {
922 if (atomic_read(&other_jl->j_commit_left) != 0) {
923 flush_commit_list(s, other_jl, 0);
924
925
926 if (!journal_list_still_alive(s, trans_id))
927 return 1;
928
929
930
931
932
933
934
935 if (!journal_list_still_alive
936 (s, other_trans_id)) {
937 goto find_first;
938 }
939 }
940 entry = entry->next;
941 if (entry == &journal->j_journal_list)
942 return 0;
943 } else {
944 return 0;
945 }
946 }
947 return 0;
948 }
949
950 static int reiserfs_async_progress_wait(struct super_block *s)
951 {
952 struct reiserfs_journal *j = SB_JOURNAL(s);
953
954 if (atomic_read(&j->j_async_throttle)) {
955 int depth;
956
957 depth = reiserfs_write_unlock_nested(s);
958 congestion_wait(BLK_RW_ASYNC, HZ / 10);
959 reiserfs_write_lock_nested(s, depth);
960 }
961
962 return 0;
963 }
964
965
966
967
968
969
970
971
972 static int flush_commit_list(struct super_block *s,
973 struct reiserfs_journal_list *jl, int flushall)
974 {
975 int i;
976 b_blocknr_t bn;
977 struct buffer_head *tbh = NULL;
978 unsigned int trans_id = jl->j_trans_id;
979 struct reiserfs_journal *journal = SB_JOURNAL(s);
980 int retval = 0;
981 int write_len;
982 int depth;
983
984 reiserfs_check_lock_depth(s, "flush_commit_list");
985
986 if (atomic_read(&jl->j_older_commits_done)) {
987 return 0;
988 }
989
990
991
992
993
994 BUG_ON(jl->j_len <= 0);
995 BUG_ON(trans_id == journal->j_trans_id);
996
997 get_journal_list(jl);
998 if (flushall) {
999 if (flush_older_commits(s, jl) == 1) {
1000
1001
1002
1003
1004 goto put_jl;
1005 }
1006 }
1007
1008
1009 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s);
1010
1011 if (!journal_list_still_alive(s, trans_id)) {
1012 mutex_unlock(&jl->j_commit_mutex);
1013 goto put_jl;
1014 }
1015 BUG_ON(jl->j_trans_id == 0);
1016
1017
1018 if (atomic_read(&jl->j_commit_left) <= 0) {
1019 if (flushall) {
1020 atomic_set(&jl->j_older_commits_done, 1);
1021 }
1022 mutex_unlock(&jl->j_commit_mutex);
1023 goto put_jl;
1024 }
1025
1026 if (!list_empty(&jl->j_bh_list)) {
1027 int ret;
1028
1029
1030
1031
1032
1033 depth = reiserfs_write_unlock_nested(s);
1034 ret = write_ordered_buffers(&journal->j_dirty_buffers_lock,
1035 journal, jl, &jl->j_bh_list);
1036 if (ret < 0 && retval == 0)
1037 retval = ret;
1038 reiserfs_write_lock_nested(s, depth);
1039 }
1040 BUG_ON(!list_empty(&jl->j_bh_list));
1041
1042
1043
1044
1045
1046
1047
1048 atomic_inc(&journal->j_async_throttle);
1049 write_len = jl->j_len + 1;
1050 if (write_len < 256)
1051 write_len = 256;
1052 for (i = 0 ; i < write_len ; i++) {
1053 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) %
1054 SB_ONDISK_JOURNAL_SIZE(s);
1055 tbh = journal_find_get_block(s, bn);
1056 if (tbh) {
1057 if (buffer_dirty(tbh)) {
1058 depth = reiserfs_write_unlock_nested(s);
1059 ll_rw_block(REQ_OP_WRITE, 0, 1, &tbh);
1060 reiserfs_write_lock_nested(s, depth);
1061 }
1062 put_bh(tbh) ;
1063 }
1064 }
1065 atomic_dec(&journal->j_async_throttle);
1066
1067 for (i = 0; i < (jl->j_len + 1); i++) {
1068 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) +
1069 (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s);
1070 tbh = journal_find_get_block(s, bn);
1071
1072 depth = reiserfs_write_unlock_nested(s);
1073 __wait_on_buffer(tbh);
1074 reiserfs_write_lock_nested(s, depth);
1075
1076
1077
1078
1079
1080 if (buffer_dirty(tbh)) {
1081 depth = reiserfs_write_unlock_nested(s);
1082 sync_dirty_buffer(tbh);
1083 reiserfs_write_lock_nested(s, depth);
1084 }
1085 if (unlikely(!buffer_uptodate(tbh))) {
1086 #ifdef CONFIG_REISERFS_CHECK
1087 reiserfs_warning(s, "journal-601",
1088 "buffer write failed");
1089 #endif
1090 retval = -EIO;
1091 }
1092
1093 put_bh(tbh);
1094
1095 put_bh(tbh);
1096 atomic_dec(&jl->j_commit_left);
1097 }
1098
1099 BUG_ON(atomic_read(&jl->j_commit_left) != 1);
1100
1101
1102
1103
1104
1105
1106
1107 if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
1108 if (buffer_dirty(jl->j_commit_bh))
1109 BUG();
1110 mark_buffer_dirty(jl->j_commit_bh) ;
1111 depth = reiserfs_write_unlock_nested(s);
1112 if (reiserfs_barrier_flush(s))
1113 __sync_dirty_buffer(jl->j_commit_bh,
1114 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1115 else
1116 sync_dirty_buffer(jl->j_commit_bh);
1117 reiserfs_write_lock_nested(s, depth);
1118 }
1119
1120
1121
1122
1123
1124
1125 if (unlikely(!buffer_uptodate(jl->j_commit_bh))) {
1126 #ifdef CONFIG_REISERFS_CHECK
1127 reiserfs_warning(s, "journal-615", "buffer write failed");
1128 #endif
1129 retval = -EIO;
1130 }
1131 bforget(jl->j_commit_bh);
1132 if (journal->j_last_commit_id != 0 &&
1133 (jl->j_trans_id - journal->j_last_commit_id) != 1) {
1134 reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu",
1135 journal->j_last_commit_id, jl->j_trans_id);
1136 }
1137 journal->j_last_commit_id = jl->j_trans_id;
1138
1139
1140
1141
1142
1143 cleanup_freed_for_journal_list(s, jl);
1144
1145 retval = retval ? retval : journal->j_errno;
1146
1147
1148 if (!retval)
1149 dirty_one_transaction(s, jl);
1150 atomic_dec(&jl->j_commit_left);
1151
1152 if (flushall) {
1153 atomic_set(&jl->j_older_commits_done, 1);
1154 }
1155 mutex_unlock(&jl->j_commit_mutex);
1156 put_jl:
1157 put_journal_list(s, jl);
1158
1159 if (retval)
1160 reiserfs_abort(s, retval, "Journal write error in %s",
1161 __func__);
1162 return retval;
1163 }
1164
1165
1166
1167
1168
1169 static struct reiserfs_journal_list *find_newer_jl_for_cn(struct
1170 reiserfs_journal_cnode
1171 *cn)
1172 {
1173 struct super_block *sb = cn->sb;
1174 b_blocknr_t blocknr = cn->blocknr;
1175
1176 cn = cn->hprev;
1177 while (cn) {
1178 if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) {
1179 return cn->jlist;
1180 }
1181 cn = cn->hprev;
1182 }
1183 return NULL;
1184 }
1185
1186 static void remove_journal_hash(struct super_block *,
1187 struct reiserfs_journal_cnode **,
1188 struct reiserfs_journal_list *, unsigned long,
1189 int);
1190
1191
1192
1193
1194
1195
1196
1197 static void remove_all_from_journal_list(struct super_block *sb,
1198 struct reiserfs_journal_list *jl,
1199 int debug)
1200 {
1201 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1202 struct reiserfs_journal_cnode *cn, *last;
1203 cn = jl->j_realblock;
1204
1205
1206
1207
1208
1209 while (cn) {
1210 if (cn->blocknr != 0) {
1211 if (debug) {
1212 reiserfs_warning(sb, "reiserfs-2201",
1213 "block %u, bh is %d, state %ld",
1214 cn->blocknr, cn->bh ? 1 : 0,
1215 cn->state);
1216 }
1217 cn->state = 0;
1218 remove_journal_hash(sb, journal->j_list_hash_table,
1219 jl, cn->blocknr, 1);
1220 }
1221 last = cn;
1222 cn = cn->next;
1223 free_cnode(sb, last);
1224 }
1225 jl->j_realblock = NULL;
1226 }
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236 static int _update_journal_header_block(struct super_block *sb,
1237 unsigned long offset,
1238 unsigned int trans_id)
1239 {
1240 struct reiserfs_journal_header *jh;
1241 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1242 int depth;
1243
1244 if (reiserfs_is_journal_aborted(journal))
1245 return -EIO;
1246
1247 if (trans_id >= journal->j_last_flush_trans_id) {
1248 if (buffer_locked((journal->j_header_bh))) {
1249 depth = reiserfs_write_unlock_nested(sb);
1250 __wait_on_buffer(journal->j_header_bh);
1251 reiserfs_write_lock_nested(sb, depth);
1252 if (unlikely(!buffer_uptodate(journal->j_header_bh))) {
1253 #ifdef CONFIG_REISERFS_CHECK
1254 reiserfs_warning(sb, "journal-699",
1255 "buffer write failed");
1256 #endif
1257 return -EIO;
1258 }
1259 }
1260 journal->j_last_flush_trans_id = trans_id;
1261 journal->j_first_unflushed_offset = offset;
1262 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->
1263 b_data);
1264 jh->j_last_flush_trans_id = cpu_to_le32(trans_id);
1265 jh->j_first_unflushed_offset = cpu_to_le32(offset);
1266 jh->j_mount_id = cpu_to_le32(journal->j_mount_id);
1267
1268 set_buffer_dirty(journal->j_header_bh);
1269 depth = reiserfs_write_unlock_nested(sb);
1270
1271 if (reiserfs_barrier_flush(sb))
1272 __sync_dirty_buffer(journal->j_header_bh,
1273 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1274 else
1275 sync_dirty_buffer(journal->j_header_bh);
1276
1277 reiserfs_write_lock_nested(sb, depth);
1278 if (!buffer_uptodate(journal->j_header_bh)) {
1279 reiserfs_warning(sb, "journal-837",
1280 "IO error during journal replay");
1281 return -EIO;
1282 }
1283 }
1284 return 0;
1285 }
1286
1287 static int update_journal_header_block(struct super_block *sb,
1288 unsigned long offset,
1289 unsigned int trans_id)
1290 {
1291 return _update_journal_header_block(sb, offset, trans_id);
1292 }
1293
1294
1295
1296
1297
1298 static int flush_older_journal_lists(struct super_block *sb,
1299 struct reiserfs_journal_list *jl)
1300 {
1301 struct list_head *entry;
1302 struct reiserfs_journal_list *other_jl;
1303 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1304 unsigned int trans_id = jl->j_trans_id;
1305
1306
1307
1308
1309
1310 restart:
1311 entry = journal->j_journal_list.next;
1312
1313 if (entry == &journal->j_journal_list)
1314 return 0;
1315 other_jl = JOURNAL_LIST_ENTRY(entry);
1316 if (other_jl->j_trans_id < trans_id) {
1317 BUG_ON(other_jl->j_refcount <= 0);
1318
1319 flush_journal_list(sb, other_jl, 0);
1320
1321
1322 goto restart;
1323 }
1324 return 0;
1325 }
1326
1327 static void del_from_work_list(struct super_block *s,
1328 struct reiserfs_journal_list *jl)
1329 {
1330 struct reiserfs_journal *journal = SB_JOURNAL(s);
1331 if (!list_empty(&jl->j_working_list)) {
1332 list_del_init(&jl->j_working_list);
1333 journal->j_num_work_lists--;
1334 }
1335 }
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347 static int flush_journal_list(struct super_block *s,
1348 struct reiserfs_journal_list *jl, int flushall)
1349 {
1350 struct reiserfs_journal_list *pjl;
1351 struct reiserfs_journal_cnode *cn;
1352 int count;
1353 int was_jwait = 0;
1354 int was_dirty = 0;
1355 struct buffer_head *saved_bh;
1356 unsigned long j_len_saved = jl->j_len;
1357 struct reiserfs_journal *journal = SB_JOURNAL(s);
1358 int err = 0;
1359 int depth;
1360
1361 BUG_ON(j_len_saved <= 0);
1362
1363 if (atomic_read(&journal->j_wcount) != 0) {
1364 reiserfs_warning(s, "clm-2048", "called with wcount %d",
1365 atomic_read(&journal->j_wcount));
1366 }
1367
1368
1369 if (flushall) {
1370 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1371 } else if (mutex_trylock(&journal->j_flush_mutex)) {
1372 BUG();
1373 }
1374
1375 count = 0;
1376 if (j_len_saved > journal->j_trans_max) {
1377 reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu",
1378 j_len_saved, jl->j_trans_id);
1379 return 0;
1380 }
1381
1382
1383 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1384 atomic_read(&jl->j_commit_left) <= 0) {
1385 goto flush_older_and_return;
1386 }
1387
1388
1389
1390
1391
1392 flush_commit_list(s, jl, 1);
1393
1394 if (!(jl->j_state & LIST_DIRTY)
1395 && !reiserfs_is_journal_aborted(journal))
1396 BUG();
1397
1398
1399 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1400 atomic_read(&jl->j_commit_left) <= 0) {
1401 goto flush_older_and_return;
1402 }
1403
1404
1405
1406
1407
1408 if (atomic_read(&journal->j_wcount) != 0) {
1409 reiserfs_panic(s, "journal-844", "journal list is flushing, "
1410 "wcount is not 0");
1411 }
1412 cn = jl->j_realblock;
1413 while (cn) {
1414 was_jwait = 0;
1415 was_dirty = 0;
1416 saved_bh = NULL;
1417
1418 if (cn->blocknr == 0) {
1419 goto free_cnode;
1420 }
1421
1422
1423
1424
1425
1426 if (!(jl->j_state & LIST_DIRTY))
1427 goto free_cnode;
1428
1429 pjl = find_newer_jl_for_cn(cn);
1430
1431
1432
1433
1434
1435 if (!pjl && cn->bh) {
1436 saved_bh = cn->bh;
1437
1438
1439
1440
1441
1442 get_bh(saved_bh);
1443
1444 if (buffer_journal_dirty(saved_bh)) {
1445 BUG_ON(!can_dirty(cn));
1446 was_jwait = 1;
1447 was_dirty = 1;
1448 } else if (can_dirty(cn)) {
1449
1450
1451
1452
1453 BUG();
1454 }
1455 }
1456
1457
1458
1459
1460
1461 if (pjl) {
1462 if (atomic_read(&pjl->j_commit_left))
1463 flush_commit_list(s, pjl, 1);
1464 goto free_cnode;
1465 }
1466
1467
1468
1469
1470
1471 if (saved_bh == NULL) {
1472 goto free_cnode;
1473 }
1474
1475
1476
1477
1478
1479
1480 if ((!was_jwait) && !buffer_locked(saved_bh)) {
1481 reiserfs_warning(s, "journal-813",
1482 "BAD! buffer %llu %cdirty %cjwait, "
1483 "not in a newer transaction",
1484 (unsigned long long)saved_bh->
1485 b_blocknr, was_dirty ? ' ' : '!',
1486 was_jwait ? ' ' : '!');
1487 }
1488 if (was_dirty) {
1489
1490
1491
1492
1493 get_bh(saved_bh);
1494 set_bit(BLOCK_NEEDS_FLUSH, &cn->state);
1495 lock_buffer(saved_bh);
1496 BUG_ON(cn->blocknr != saved_bh->b_blocknr);
1497 if (buffer_dirty(saved_bh))
1498 submit_logged_buffer(saved_bh);
1499 else
1500 unlock_buffer(saved_bh);
1501 count++;
1502 } else {
1503 reiserfs_warning(s, "clm-2082",
1504 "Unable to flush buffer %llu in %s",
1505 (unsigned long long)saved_bh->
1506 b_blocknr, __func__);
1507 }
1508 free_cnode:
1509 cn = cn->next;
1510 if (saved_bh) {
1511
1512
1513
1514
1515 put_bh(saved_bh);
1516 if (atomic_read(&saved_bh->b_count) < 0) {
1517 reiserfs_warning(s, "journal-945",
1518 "saved_bh->b_count < 0");
1519 }
1520 }
1521 }
1522 if (count > 0) {
1523 cn = jl->j_realblock;
1524 while (cn) {
1525 if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) {
1526 if (!cn->bh) {
1527 reiserfs_panic(s, "journal-1011",
1528 "cn->bh is NULL");
1529 }
1530
1531 depth = reiserfs_write_unlock_nested(s);
1532 __wait_on_buffer(cn->bh);
1533 reiserfs_write_lock_nested(s, depth);
1534
1535 if (!cn->bh) {
1536 reiserfs_panic(s, "journal-1012",
1537 "cn->bh is NULL");
1538 }
1539 if (unlikely(!buffer_uptodate(cn->bh))) {
1540 #ifdef CONFIG_REISERFS_CHECK
1541 reiserfs_warning(s, "journal-949",
1542 "buffer write failed");
1543 #endif
1544 err = -EIO;
1545 }
1546
1547
1548
1549
1550
1551 BUG_ON(!test_clear_buffer_journal_dirty
1552 (cn->bh));
1553
1554
1555 put_bh(cn->bh);
1556
1557 release_buffer_page(cn->bh);
1558 }
1559 cn = cn->next;
1560 }
1561 }
1562
1563 if (err)
1564 reiserfs_abort(s, -EIO,
1565 "Write error while pushing transaction to disk in %s",
1566 __func__);
1567 flush_older_and_return:
1568
1569
1570
1571
1572
1573
1574
1575 if (flushall) {
1576 flush_older_journal_lists(s, jl);
1577 }
1578
1579 err = journal->j_errno;
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589 if (!err && flushall) {
1590 err =
1591 update_journal_header_block(s,
1592 (jl->j_start + jl->j_len +
1593 2) % SB_ONDISK_JOURNAL_SIZE(s),
1594 jl->j_trans_id);
1595 if (err)
1596 reiserfs_abort(s, -EIO,
1597 "Write error while updating journal header in %s",
1598 __func__);
1599 }
1600 remove_all_from_journal_list(s, jl, 0);
1601 list_del_init(&jl->j_list);
1602 journal->j_num_lists--;
1603 del_from_work_list(s, jl);
1604
1605 if (journal->j_last_flush_id != 0 &&
1606 (jl->j_trans_id - journal->j_last_flush_id) != 1) {
1607 reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu",
1608 journal->j_last_flush_id, jl->j_trans_id);
1609 }
1610 journal->j_last_flush_id = jl->j_trans_id;
1611
1612
1613
1614
1615
1616 jl->j_len = 0;
1617 atomic_set(&jl->j_nonzerolen, 0);
1618 jl->j_start = 0;
1619 jl->j_realblock = NULL;
1620 jl->j_commit_bh = NULL;
1621 jl->j_trans_id = 0;
1622 jl->j_state = 0;
1623 put_journal_list(s, jl);
1624 if (flushall)
1625 mutex_unlock(&journal->j_flush_mutex);
1626 return err;
1627 }
1628
1629 static int write_one_transaction(struct super_block *s,
1630 struct reiserfs_journal_list *jl,
1631 struct buffer_chunk *chunk)
1632 {
1633 struct reiserfs_journal_cnode *cn;
1634 int ret = 0;
1635
1636 jl->j_state |= LIST_TOUCHED;
1637 del_from_work_list(s, jl);
1638 if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) {
1639 return 0;
1640 }
1641
1642 cn = jl->j_realblock;
1643 while (cn) {
1644
1645
1646
1647
1648 if (cn->blocknr == 0) {
1649 goto next;
1650 }
1651 if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
1652 struct buffer_head *tmp_bh;
1653
1654
1655
1656
1657
1658 tmp_bh = cn->bh;
1659 get_bh(tmp_bh);
1660 lock_buffer(tmp_bh);
1661 if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) {
1662 if (!buffer_journal_dirty(tmp_bh) ||
1663 buffer_journal_prepared(tmp_bh))
1664 BUG();
1665 add_to_chunk(chunk, tmp_bh, NULL, write_chunk);
1666 ret++;
1667 } else {
1668
1669 unlock_buffer(tmp_bh);
1670 }
1671 put_bh(tmp_bh);
1672 }
1673 next:
1674 cn = cn->next;
1675 cond_resched();
1676 }
1677 return ret;
1678 }
1679
1680
1681 static void dirty_one_transaction(struct super_block *s,
1682 struct reiserfs_journal_list *jl)
1683 {
1684 struct reiserfs_journal_cnode *cn;
1685 struct reiserfs_journal_list *pjl;
1686
1687 jl->j_state |= LIST_DIRTY;
1688 cn = jl->j_realblock;
1689 while (cn) {
1690
1691
1692
1693
1694
1695 pjl = find_newer_jl_for_cn(cn);
1696 if (!pjl && cn->blocknr && cn->bh
1697 && buffer_journal_dirty(cn->bh)) {
1698 BUG_ON(!can_dirty(cn));
1699
1700
1701
1702
1703
1704 clear_buffer_journal_new(cn->bh);
1705 if (buffer_journal_prepared(cn->bh)) {
1706 set_buffer_journal_restore_dirty(cn->bh);
1707 } else {
1708 set_buffer_journal_test(cn->bh);
1709 mark_buffer_dirty(cn->bh);
1710 }
1711 }
1712 cn = cn->next;
1713 }
1714 }
1715
1716 static int kupdate_transactions(struct super_block *s,
1717 struct reiserfs_journal_list *jl,
1718 struct reiserfs_journal_list **next_jl,
1719 unsigned int *next_trans_id,
1720 int num_blocks, int num_trans)
1721 {
1722 int ret = 0;
1723 int written = 0;
1724 int transactions_flushed = 0;
1725 unsigned int orig_trans_id = jl->j_trans_id;
1726 struct buffer_chunk chunk;
1727 struct list_head *entry;
1728 struct reiserfs_journal *journal = SB_JOURNAL(s);
1729 chunk.nr = 0;
1730
1731 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1732 if (!journal_list_still_alive(s, orig_trans_id)) {
1733 goto done;
1734 }
1735
1736
1737
1738
1739
1740 while ((num_trans && transactions_flushed < num_trans) ||
1741 (!num_trans && written < num_blocks)) {
1742
1743 if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) ||
1744 atomic_read(&jl->j_commit_left)
1745 || !(jl->j_state & LIST_DIRTY)) {
1746 del_from_work_list(s, jl);
1747 break;
1748 }
1749 ret = write_one_transaction(s, jl, &chunk);
1750
1751 if (ret < 0)
1752 goto done;
1753 transactions_flushed++;
1754 written += ret;
1755 entry = jl->j_list.next;
1756
1757
1758 if (entry == &journal->j_journal_list) {
1759 break;
1760 }
1761 jl = JOURNAL_LIST_ENTRY(entry);
1762
1763
1764 if (jl->j_trans_id <= orig_trans_id)
1765 break;
1766 }
1767 if (chunk.nr) {
1768 write_chunk(&chunk);
1769 }
1770
1771 done:
1772 mutex_unlock(&journal->j_flush_mutex);
1773 return ret;
1774 }
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786 static int flush_used_journal_lists(struct super_block *s,
1787 struct reiserfs_journal_list *jl)
1788 {
1789 unsigned long len = 0;
1790 unsigned long cur_len;
1791 int i;
1792 int limit = 256;
1793 struct reiserfs_journal_list *tjl;
1794 struct reiserfs_journal_list *flush_jl;
1795 unsigned int trans_id;
1796 struct reiserfs_journal *journal = SB_JOURNAL(s);
1797
1798 flush_jl = tjl = jl;
1799
1800
1801 if (reiserfs_data_log(s))
1802 limit = 1024;
1803
1804 for (i = 0; i < 256 && len < limit; i++) {
1805 if (atomic_read(&tjl->j_commit_left) ||
1806 tjl->j_trans_id < jl->j_trans_id) {
1807 break;
1808 }
1809 cur_len = atomic_read(&tjl->j_nonzerolen);
1810 if (cur_len > 0) {
1811 tjl->j_state &= ~LIST_TOUCHED;
1812 }
1813 len += cur_len;
1814 flush_jl = tjl;
1815 if (tjl->j_list.next == &journal->j_journal_list)
1816 break;
1817 tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next);
1818 }
1819 get_journal_list(jl);
1820 get_journal_list(flush_jl);
1821
1822
1823
1824
1825
1826
1827 if (flush_jl != jl)
1828 kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
1829
1830 flush_journal_list(s, flush_jl, 1);
1831 put_journal_list(s, flush_jl);
1832 put_journal_list(s, jl);
1833 return 0;
1834 }
1835
1836
1837
1838
1839
1840 static void remove_journal_hash(struct super_block *sb,
1841 struct reiserfs_journal_cnode **table,
1842 struct reiserfs_journal_list *jl,
1843 unsigned long block, int remove_freed)
1844 {
1845 struct reiserfs_journal_cnode *cur;
1846 struct reiserfs_journal_cnode **head;
1847
1848 head = &(journal_hash(table, sb, block));
1849 if (!head) {
1850 return;
1851 }
1852 cur = *head;
1853 while (cur) {
1854 if (cur->blocknr == block && cur->sb == sb
1855 && (jl == NULL || jl == cur->jlist)
1856 && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) {
1857 if (cur->hnext) {
1858 cur->hnext->hprev = cur->hprev;
1859 }
1860 if (cur->hprev) {
1861 cur->hprev->hnext = cur->hnext;
1862 } else {
1863 *head = cur->hnext;
1864 }
1865 cur->blocknr = 0;
1866 cur->sb = NULL;
1867 cur->state = 0;
1868
1869
1870
1871
1872 if (cur->bh && cur->jlist)
1873 atomic_dec(&cur->jlist->j_nonzerolen);
1874 cur->bh = NULL;
1875 cur->jlist = NULL;
1876 }
1877 cur = cur->hnext;
1878 }
1879 }
1880
1881 static void free_journal_ram(struct super_block *sb)
1882 {
1883 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1884 kfree(journal->j_current_jl);
1885 journal->j_num_lists--;
1886
1887 vfree(journal->j_cnode_free_orig);
1888 free_list_bitmaps(sb, journal->j_list_bitmap);
1889 free_bitmap_nodes(sb);
1890 if (journal->j_header_bh) {
1891 brelse(journal->j_header_bh);
1892 }
1893
1894
1895
1896
1897 release_journal_dev(sb, journal);
1898 vfree(journal);
1899 }
1900
1901
1902
1903
1904
1905 static int do_journal_release(struct reiserfs_transaction_handle *th,
1906 struct super_block *sb, int error)
1907 {
1908 struct reiserfs_transaction_handle myth;
1909 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1910
1911
1912
1913
1914
1915 if (!error && !sb_rdonly(sb)) {
1916
1917 BUG_ON(!th->t_trans_id);
1918 do_journal_end(th, FLUSH_ALL);
1919
1920
1921
1922
1923
1924 if (!journal_join(&myth, sb)) {
1925 reiserfs_prepare_for_journal(sb,
1926 SB_BUFFER_WITH_SB(sb),
1927 1);
1928 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1929 do_journal_end(&myth, FLUSH_ALL);
1930 }
1931 }
1932
1933
1934 if (!error && reiserfs_is_journal_aborted(journal)) {
1935 memset(&myth, 0, sizeof(myth));
1936 if (!journal_join_abort(&myth, sb)) {
1937 reiserfs_prepare_for_journal(sb,
1938 SB_BUFFER_WITH_SB(sb),
1939 1);
1940 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1941 do_journal_end(&myth, FLUSH_ALL);
1942 }
1943 }
1944
1945
1946
1947
1948
1949
1950 reiserfs_write_unlock(sb);
1951
1952
1953
1954
1955
1956
1957 reiserfs_cancel_old_flush(sb);
1958
1959 cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work);
1960
1961 free_journal_ram(sb);
1962
1963 reiserfs_write_lock(sb);
1964
1965 return 0;
1966 }
1967
1968
1969 int journal_release(struct reiserfs_transaction_handle *th,
1970 struct super_block *sb)
1971 {
1972 return do_journal_release(th, sb, 0);
1973 }
1974
1975
1976 int journal_release_error(struct reiserfs_transaction_handle *th,
1977 struct super_block *sb)
1978 {
1979 return do_journal_release(th, sb, 1);
1980 }
1981
1982
1983
1984
1985
1986 static int journal_compare_desc_commit(struct super_block *sb,
1987 struct reiserfs_journal_desc *desc,
1988 struct reiserfs_journal_commit *commit)
1989 {
1990 if (get_commit_trans_id(commit) != get_desc_trans_id(desc) ||
1991 get_commit_trans_len(commit) != get_desc_trans_len(desc) ||
1992 get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max ||
1993 get_commit_trans_len(commit) <= 0) {
1994 return 1;
1995 }
1996 return 0;
1997 }
1998
1999
2000
2001
2002
2003
2004
2005 static int journal_transaction_is_valid(struct super_block *sb,
2006 struct buffer_head *d_bh,
2007 unsigned int *oldest_invalid_trans_id,
2008 unsigned long *newest_mount_id)
2009 {
2010 struct reiserfs_journal_desc *desc;
2011 struct reiserfs_journal_commit *commit;
2012 struct buffer_head *c_bh;
2013 unsigned long offset;
2014
2015 if (!d_bh)
2016 return 0;
2017
2018 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2019 if (get_desc_trans_len(desc) > 0
2020 && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) {
2021 if (oldest_invalid_trans_id && *oldest_invalid_trans_id
2022 && get_desc_trans_id(desc) > *oldest_invalid_trans_id) {
2023 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2024 "journal-986: transaction "
2025 "is valid returning because trans_id %d is greater than "
2026 "oldest_invalid %lu",
2027 get_desc_trans_id(desc),
2028 *oldest_invalid_trans_id);
2029 return 0;
2030 }
2031 if (newest_mount_id
2032 && *newest_mount_id > get_desc_mount_id(desc)) {
2033 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2034 "journal-1087: transaction "
2035 "is valid returning because mount_id %d is less than "
2036 "newest_mount_id %lu",
2037 get_desc_mount_id(desc),
2038 *newest_mount_id);
2039 return -1;
2040 }
2041 if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) {
2042 reiserfs_warning(sb, "journal-2018",
2043 "Bad transaction length %d "
2044 "encountered, ignoring transaction",
2045 get_desc_trans_len(desc));
2046 return -1;
2047 }
2048 offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2049
2050
2051
2052
2053
2054 c_bh =
2055 journal_bread(sb,
2056 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2057 ((offset + get_desc_trans_len(desc) +
2058 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
2059 if (!c_bh)
2060 return 0;
2061 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2062 if (journal_compare_desc_commit(sb, desc, commit)) {
2063 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2064 "journal_transaction_is_valid, commit offset %ld had bad "
2065 "time %d or length %d",
2066 c_bh->b_blocknr -
2067 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2068 get_commit_trans_id(commit),
2069 get_commit_trans_len(commit));
2070 brelse(c_bh);
2071 if (oldest_invalid_trans_id) {
2072 *oldest_invalid_trans_id =
2073 get_desc_trans_id(desc);
2074 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2075 "journal-1004: "
2076 "transaction_is_valid setting oldest invalid trans_id "
2077 "to %d",
2078 get_desc_trans_id(desc));
2079 }
2080 return -1;
2081 }
2082 brelse(c_bh);
2083 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2084 "journal-1006: found valid "
2085 "transaction start offset %llu, len %d id %d",
2086 d_bh->b_blocknr -
2087 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2088 get_desc_trans_len(desc),
2089 get_desc_trans_id(desc));
2090 return 1;
2091 } else {
2092 return 0;
2093 }
2094 }
2095
2096 static void brelse_array(struct buffer_head **heads, int num)
2097 {
2098 int i;
2099 for (i = 0; i < num; i++) {
2100 brelse(heads[i]);
2101 }
2102 }
2103
2104
2105
2106
2107
2108
2109
2110 static int journal_read_transaction(struct super_block *sb,
2111 unsigned long cur_dblock,
2112 unsigned long oldest_start,
2113 unsigned int oldest_trans_id,
2114 unsigned long newest_mount_id)
2115 {
2116 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2117 struct reiserfs_journal_desc *desc;
2118 struct reiserfs_journal_commit *commit;
2119 unsigned int trans_id = 0;
2120 struct buffer_head *c_bh;
2121 struct buffer_head *d_bh;
2122 struct buffer_head **log_blocks = NULL;
2123 struct buffer_head **real_blocks = NULL;
2124 unsigned int trans_offset;
2125 int i;
2126 int trans_half;
2127
2128 d_bh = journal_bread(sb, cur_dblock);
2129 if (!d_bh)
2130 return 1;
2131 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2132 trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2133 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: "
2134 "journal_read_transaction, offset %llu, len %d mount_id %d",
2135 d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2136 get_desc_trans_len(desc), get_desc_mount_id(desc));
2137 if (get_desc_trans_id(desc) < oldest_trans_id) {
2138 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: "
2139 "journal_read_trans skipping because %lu is too old",
2140 cur_dblock -
2141 SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2142 brelse(d_bh);
2143 return 1;
2144 }
2145 if (get_desc_mount_id(desc) != newest_mount_id) {
2146 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: "
2147 "journal_read_trans skipping because %d is != "
2148 "newest_mount_id %lu", get_desc_mount_id(desc),
2149 newest_mount_id);
2150 brelse(d_bh);
2151 return 1;
2152 }
2153 c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2154 ((trans_offset + get_desc_trans_len(desc) + 1) %
2155 SB_ONDISK_JOURNAL_SIZE(sb)));
2156 if (!c_bh) {
2157 brelse(d_bh);
2158 return 1;
2159 }
2160 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2161 if (journal_compare_desc_commit(sb, desc, commit)) {
2162 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2163 "journal_read_transaction, "
2164 "commit offset %llu had bad time %d or length %d",
2165 c_bh->b_blocknr -
2166 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2167 get_commit_trans_id(commit),
2168 get_commit_trans_len(commit));
2169 brelse(c_bh);
2170 brelse(d_bh);
2171 return 1;
2172 }
2173
2174 if (bdev_read_only(sb->s_bdev)) {
2175 reiserfs_warning(sb, "clm-2076",
2176 "device is readonly, unable to replay log");
2177 brelse(c_bh);
2178 brelse(d_bh);
2179 return -EROFS;
2180 }
2181
2182 trans_id = get_desc_trans_id(desc);
2183
2184
2185
2186
2187 log_blocks = kmalloc_array(get_desc_trans_len(desc),
2188 sizeof(struct buffer_head *),
2189 GFP_NOFS);
2190 real_blocks = kmalloc_array(get_desc_trans_len(desc),
2191 sizeof(struct buffer_head *),
2192 GFP_NOFS);
2193 if (!log_blocks || !real_blocks) {
2194 brelse(c_bh);
2195 brelse(d_bh);
2196 kfree(log_blocks);
2197 kfree(real_blocks);
2198 reiserfs_warning(sb, "journal-1169",
2199 "kmalloc failed, unable to mount FS");
2200 return -1;
2201 }
2202
2203 trans_half = journal_trans_half(sb->s_blocksize);
2204 for (i = 0; i < get_desc_trans_len(desc); i++) {
2205 log_blocks[i] =
2206 journal_getblk(sb,
2207 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2208 (trans_offset + 1 +
2209 i) % SB_ONDISK_JOURNAL_SIZE(sb));
2210 if (i < trans_half) {
2211 real_blocks[i] =
2212 sb_getblk(sb,
2213 le32_to_cpu(desc->j_realblock[i]));
2214 } else {
2215 real_blocks[i] =
2216 sb_getblk(sb,
2217 le32_to_cpu(commit->
2218 j_realblock[i - trans_half]));
2219 }
2220 if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) {
2221 reiserfs_warning(sb, "journal-1207",
2222 "REPLAY FAILURE fsck required! "
2223 "Block to replay is outside of "
2224 "filesystem");
2225 goto abort_replay;
2226 }
2227
2228 if (is_block_in_log_or_reserved_area
2229 (sb, real_blocks[i]->b_blocknr)) {
2230 reiserfs_warning(sb, "journal-1204",
2231 "REPLAY FAILURE fsck required! "
2232 "Trying to replay onto a log block");
2233 abort_replay:
2234 brelse_array(log_blocks, i);
2235 brelse_array(real_blocks, i);
2236 brelse(c_bh);
2237 brelse(d_bh);
2238 kfree(log_blocks);
2239 kfree(real_blocks);
2240 return -1;
2241 }
2242 }
2243
2244 ll_rw_block(REQ_OP_READ, 0, get_desc_trans_len(desc), log_blocks);
2245 for (i = 0; i < get_desc_trans_len(desc); i++) {
2246
2247 wait_on_buffer(log_blocks[i]);
2248 if (!buffer_uptodate(log_blocks[i])) {
2249 reiserfs_warning(sb, "journal-1212",
2250 "REPLAY FAILURE fsck required! "
2251 "buffer write failed");
2252 brelse_array(log_blocks + i,
2253 get_desc_trans_len(desc) - i);
2254 brelse_array(real_blocks, get_desc_trans_len(desc));
2255 brelse(c_bh);
2256 brelse(d_bh);
2257 kfree(log_blocks);
2258 kfree(real_blocks);
2259 return -1;
2260 }
2261 memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data,
2262 real_blocks[i]->b_size);
2263 set_buffer_uptodate(real_blocks[i]);
2264 brelse(log_blocks[i]);
2265 }
2266
2267 for (i = 0; i < get_desc_trans_len(desc); i++) {
2268 set_buffer_dirty(real_blocks[i]);
2269 write_dirty_buffer(real_blocks[i], 0);
2270 }
2271 for (i = 0; i < get_desc_trans_len(desc); i++) {
2272 wait_on_buffer(real_blocks[i]);
2273 if (!buffer_uptodate(real_blocks[i])) {
2274 reiserfs_warning(sb, "journal-1226",
2275 "REPLAY FAILURE, fsck required! "
2276 "buffer write failed");
2277 brelse_array(real_blocks + i,
2278 get_desc_trans_len(desc) - i);
2279 brelse(c_bh);
2280 brelse(d_bh);
2281 kfree(log_blocks);
2282 kfree(real_blocks);
2283 return -1;
2284 }
2285 brelse(real_blocks[i]);
2286 }
2287 cur_dblock =
2288 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2289 ((trans_offset + get_desc_trans_len(desc) +
2290 2) % SB_ONDISK_JOURNAL_SIZE(sb));
2291 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2292 "journal-1095: setting journal " "start to offset %ld",
2293 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2294
2295
2296
2297
2298
2299 journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2300 journal->j_last_flush_trans_id = trans_id;
2301 journal->j_trans_id = trans_id + 1;
2302
2303 if (journal->j_trans_id == 0)
2304 journal->j_trans_id = 10;
2305 brelse(c_bh);
2306 brelse(d_bh);
2307 kfree(log_blocks);
2308 kfree(real_blocks);
2309 return 0;
2310 }
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320 static struct buffer_head *reiserfs_breada(struct block_device *dev,
2321 b_blocknr_t block, int bufsize,
2322 b_blocknr_t max_block)
2323 {
2324 struct buffer_head *bhlist[BUFNR];
2325 unsigned int blocks = BUFNR;
2326 struct buffer_head *bh;
2327 int i, j;
2328
2329 bh = __getblk(dev, block, bufsize);
2330 if (buffer_uptodate(bh))
2331 return (bh);
2332
2333 if (block + BUFNR > max_block) {
2334 blocks = max_block - block;
2335 }
2336 bhlist[0] = bh;
2337 j = 1;
2338 for (i = 1; i < blocks; i++) {
2339 bh = __getblk(dev, block + i, bufsize);
2340 if (buffer_uptodate(bh)) {
2341 brelse(bh);
2342 break;
2343 } else
2344 bhlist[j++] = bh;
2345 }
2346 ll_rw_block(REQ_OP_READ, 0, j, bhlist);
2347 for (i = 1; i < j; i++)
2348 brelse(bhlist[i]);
2349 bh = bhlist[0];
2350 wait_on_buffer(bh);
2351 if (buffer_uptodate(bh))
2352 return bh;
2353 brelse(bh);
2354 return NULL;
2355 }
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369 static int journal_read(struct super_block *sb)
2370 {
2371 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2372 struct reiserfs_journal_desc *desc;
2373 unsigned int oldest_trans_id = 0;
2374 unsigned int oldest_invalid_trans_id = 0;
2375 time64_t start;
2376 unsigned long oldest_start = 0;
2377 unsigned long cur_dblock = 0;
2378 unsigned long newest_mount_id = 9;
2379 struct buffer_head *d_bh;
2380 struct reiserfs_journal_header *jh;
2381 int valid_journal_header = 0;
2382 int replay_count = 0;
2383 int continue_replay = 1;
2384 int ret;
2385
2386 cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2387 reiserfs_info(sb, "checking transaction log (%pg)\n",
2388 journal->j_dev_bd);
2389 start = ktime_get_seconds();
2390
2391
2392
2393
2394
2395
2396 journal->j_header_bh = journal_bread(sb,
2397 SB_ONDISK_JOURNAL_1st_BLOCK(sb)
2398 + SB_ONDISK_JOURNAL_SIZE(sb));
2399 if (!journal->j_header_bh) {
2400 return 1;
2401 }
2402 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data);
2403 if (le32_to_cpu(jh->j_first_unflushed_offset) <
2404 SB_ONDISK_JOURNAL_SIZE(sb)
2405 && le32_to_cpu(jh->j_last_flush_trans_id) > 0) {
2406 oldest_start =
2407 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2408 le32_to_cpu(jh->j_first_unflushed_offset);
2409 oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2410 newest_mount_id = le32_to_cpu(jh->j_mount_id);
2411 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2412 "journal-1153: found in "
2413 "header: first_unflushed_offset %d, last_flushed_trans_id "
2414 "%lu", le32_to_cpu(jh->j_first_unflushed_offset),
2415 le32_to_cpu(jh->j_last_flush_trans_id));
2416 valid_journal_header = 1;
2417
2418
2419
2420
2421
2422
2423 d_bh =
2424 journal_bread(sb,
2425 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2426 le32_to_cpu(jh->j_first_unflushed_offset));
2427 ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL);
2428 if (!ret) {
2429 continue_replay = 0;
2430 }
2431 brelse(d_bh);
2432 goto start_log_replay;
2433 }
2434
2435
2436
2437
2438
2439
2440 while (continue_replay
2441 && cur_dblock <
2442 (SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2443 SB_ONDISK_JOURNAL_SIZE(sb))) {
2444
2445
2446
2447
2448 d_bh =
2449 reiserfs_breada(journal->j_dev_bd, cur_dblock,
2450 sb->s_blocksize,
2451 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2452 SB_ONDISK_JOURNAL_SIZE(sb));
2453 ret =
2454 journal_transaction_is_valid(sb, d_bh,
2455 &oldest_invalid_trans_id,
2456 &newest_mount_id);
2457 if (ret == 1) {
2458 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2459 if (oldest_start == 0) {
2460 oldest_trans_id = get_desc_trans_id(desc);
2461 oldest_start = d_bh->b_blocknr;
2462 newest_mount_id = get_desc_mount_id(desc);
2463 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2464 "journal-1179: Setting "
2465 "oldest_start to offset %llu, trans_id %lu",
2466 oldest_start -
2467 SB_ONDISK_JOURNAL_1st_BLOCK
2468 (sb), oldest_trans_id);
2469 } else if (oldest_trans_id > get_desc_trans_id(desc)) {
2470
2471 oldest_trans_id = get_desc_trans_id(desc);
2472 oldest_start = d_bh->b_blocknr;
2473 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2474 "journal-1180: Resetting "
2475 "oldest_start to offset %lu, trans_id %lu",
2476 oldest_start -
2477 SB_ONDISK_JOURNAL_1st_BLOCK
2478 (sb), oldest_trans_id);
2479 }
2480 if (newest_mount_id < get_desc_mount_id(desc)) {
2481 newest_mount_id = get_desc_mount_id(desc);
2482 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2483 "journal-1299: Setting "
2484 "newest_mount_id to %d",
2485 get_desc_mount_id(desc));
2486 }
2487 cur_dblock += get_desc_trans_len(desc) + 2;
2488 } else {
2489 cur_dblock++;
2490 }
2491 brelse(d_bh);
2492 }
2493
2494 start_log_replay:
2495 cur_dblock = oldest_start;
2496 if (oldest_trans_id) {
2497 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2498 "journal-1206: Starting replay "
2499 "from offset %llu, trans_id %lu",
2500 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2501 oldest_trans_id);
2502
2503 }
2504 replay_count = 0;
2505 while (continue_replay && oldest_trans_id > 0) {
2506 ret =
2507 journal_read_transaction(sb, cur_dblock, oldest_start,
2508 oldest_trans_id, newest_mount_id);
2509 if (ret < 0) {
2510 return ret;
2511 } else if (ret != 0) {
2512 break;
2513 }
2514 cur_dblock =
2515 SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start;
2516 replay_count++;
2517 if (cur_dblock == oldest_start)
2518 break;
2519 }
2520
2521 if (oldest_trans_id == 0) {
2522 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2523 "journal-1225: No valid " "transactions found");
2524 }
2525
2526
2527
2528
2529
2530
2531 if (valid_journal_header && replay_count == 0) {
2532 journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset);
2533 journal->j_trans_id =
2534 le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2535
2536 if (journal->j_trans_id == 0)
2537 journal->j_trans_id = 10;
2538 journal->j_last_flush_trans_id =
2539 le32_to_cpu(jh->j_last_flush_trans_id);
2540 journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1;
2541 } else {
2542 journal->j_mount_id = newest_mount_id + 1;
2543 }
2544 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
2545 "newest_mount_id to %lu", journal->j_mount_id);
2546 journal->j_first_unflushed_offset = journal->j_start;
2547 if (replay_count > 0) {
2548 reiserfs_info(sb,
2549 "replayed %d transactions in %lu seconds\n",
2550 replay_count, ktime_get_seconds() - start);
2551 }
2552
2553 reiserfs_write_lock(sb);
2554 if (!bdev_read_only(sb->s_bdev) &&
2555 _update_journal_header_block(sb, journal->j_start,
2556 journal->j_last_flush_trans_id)) {
2557 reiserfs_write_unlock(sb);
2558
2559
2560
2561
2562 return -1;
2563 }
2564 reiserfs_write_unlock(sb);
2565 return 0;
2566 }
2567
2568 static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
2569 {
2570 struct reiserfs_journal_list *jl;
2571 jl = kzalloc(sizeof(struct reiserfs_journal_list),
2572 GFP_NOFS | __GFP_NOFAIL);
2573 INIT_LIST_HEAD(&jl->j_list);
2574 INIT_LIST_HEAD(&jl->j_working_list);
2575 INIT_LIST_HEAD(&jl->j_tail_bh_list);
2576 INIT_LIST_HEAD(&jl->j_bh_list);
2577 mutex_init(&jl->j_commit_mutex);
2578 SB_JOURNAL(s)->j_num_lists++;
2579 get_journal_list(jl);
2580 return jl;
2581 }
2582
2583 static void journal_list_init(struct super_block *sb)
2584 {
2585 SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb);
2586 }
2587
2588 static void release_journal_dev(struct super_block *super,
2589 struct reiserfs_journal *journal)
2590 {
2591 if (journal->j_dev_bd != NULL) {
2592 blkdev_put(journal->j_dev_bd, journal->j_dev_mode);
2593 journal->j_dev_bd = NULL;
2594 }
2595 }
2596
2597 static int journal_init_dev(struct super_block *super,
2598 struct reiserfs_journal *journal,
2599 const char *jdev_name)
2600 {
2601 int result;
2602 dev_t jdev;
2603 fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
2604 char b[BDEVNAME_SIZE];
2605
2606 result = 0;
2607
2608 journal->j_dev_bd = NULL;
2609 jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
2610 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
2611
2612 if (bdev_read_only(super->s_bdev))
2613 blkdev_mode = FMODE_READ;
2614
2615
2616 if ((!jdev_name || !jdev_name[0])) {
2617 if (jdev == super->s_dev)
2618 blkdev_mode &= ~FMODE_EXCL;
2619 journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode,
2620 journal);
2621 journal->j_dev_mode = blkdev_mode;
2622 if (IS_ERR(journal->j_dev_bd)) {
2623 result = PTR_ERR(journal->j_dev_bd);
2624 journal->j_dev_bd = NULL;
2625 reiserfs_warning(super, "sh-458",
2626 "cannot init journal device '%s': %i",
2627 __bdevname(jdev, b), result);
2628 return result;
2629 } else if (jdev != super->s_dev)
2630 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2631
2632 return 0;
2633 }
2634
2635 journal->j_dev_mode = blkdev_mode;
2636 journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal);
2637 if (IS_ERR(journal->j_dev_bd)) {
2638 result = PTR_ERR(journal->j_dev_bd);
2639 journal->j_dev_bd = NULL;
2640 reiserfs_warning(super, "sh-457",
2641 "journal_init_dev: Cannot open '%s': %i",
2642 jdev_name, result);
2643 return result;
2644 }
2645
2646 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2647 reiserfs_info(super,
2648 "journal_init_dev: journal device: %pg\n",
2649 journal->j_dev_bd);
2650 return 0;
2651 }
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665 #define REISERFS_STANDARD_BLKSIZE (4096)
2666
2667 static int check_advise_trans_params(struct super_block *sb,
2668 struct reiserfs_journal *journal)
2669 {
2670 if (journal->j_trans_max) {
2671
2672 int ratio = 1;
2673 if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE)
2674 ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize;
2675
2676 if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio ||
2677 journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio ||
2678 SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max <
2679 JOURNAL_MIN_RATIO) {
2680 reiserfs_warning(sb, "sh-462",
2681 "bad transaction max size (%u). "
2682 "FSCK?", journal->j_trans_max);
2683 return 1;
2684 }
2685 if (journal->j_max_batch != (journal->j_trans_max) *
2686 JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) {
2687 reiserfs_warning(sb, "sh-463",
2688 "bad transaction max batch (%u). "
2689 "FSCK?", journal->j_max_batch);
2690 return 1;
2691 }
2692 } else {
2693
2694
2695
2696
2697
2698
2699 if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) {
2700 reiserfs_warning(sb, "sh-464", "bad blocksize (%u)",
2701 sb->s_blocksize);
2702 return 1;
2703 }
2704 journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT;
2705 journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT;
2706 journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE;
2707 }
2708 return 0;
2709 }
2710
2711
2712 int journal_init(struct super_block *sb, const char *j_dev_name,
2713 int old_format, unsigned int commit_max_age)
2714 {
2715 int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2;
2716 struct buffer_head *bhjh;
2717 struct reiserfs_super_block *rs;
2718 struct reiserfs_journal_header *jh;
2719 struct reiserfs_journal *journal;
2720 struct reiserfs_journal_list *jl;
2721 int ret;
2722
2723 journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal));
2724 if (!journal) {
2725 reiserfs_warning(sb, "journal-1256",
2726 "unable to get memory for journal structure");
2727 return 1;
2728 }
2729 INIT_LIST_HEAD(&journal->j_bitmap_nodes);
2730 INIT_LIST_HEAD(&journal->j_prealloc_list);
2731 INIT_LIST_HEAD(&journal->j_working_list);
2732 INIT_LIST_HEAD(&journal->j_journal_list);
2733 journal->j_persistent_trans = 0;
2734 if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap,
2735 reiserfs_bmap_count(sb)))
2736 goto free_and_return;
2737
2738 allocate_bitmap_nodes(sb);
2739
2740
2741 SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ?
2742 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2743 / sb->s_blocksize +
2744 reiserfs_bmap_count(sb) +
2745 1 :
2746 REISERFS_DISK_OFFSET_IN_BYTES /
2747 sb->s_blocksize + 2);
2748
2749
2750
2751
2752
2753 if (!SB_ONDISK_JOURNAL_DEVICE(sb) &&
2754 (SB_JOURNAL_1st_RESERVED_BLOCK(sb) +
2755 SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) {
2756 reiserfs_warning(sb, "journal-1393",
2757 "journal does not fit for area addressed "
2758 "by first of bitmap blocks. It starts at "
2759 "%u and its size is %u. Block size %ld",
2760 SB_JOURNAL_1st_RESERVED_BLOCK(sb),
2761 SB_ONDISK_JOURNAL_SIZE(sb),
2762 sb->s_blocksize);
2763 goto free_and_return;
2764 }
2765
2766 if (journal_init_dev(sb, journal, j_dev_name) != 0) {
2767 reiserfs_warning(sb, "sh-462",
2768 "unable to initialize journal device");
2769 goto free_and_return;
2770 }
2771
2772 rs = SB_DISK_SUPER_BLOCK(sb);
2773
2774
2775 bhjh = journal_bread(sb,
2776 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2777 SB_ONDISK_JOURNAL_SIZE(sb));
2778 if (!bhjh) {
2779 reiserfs_warning(sb, "sh-459",
2780 "unable to read journal header");
2781 goto free_and_return;
2782 }
2783 jh = (struct reiserfs_journal_header *)(bhjh->b_data);
2784
2785
2786 if (is_reiserfs_jr(rs)
2787 && (le32_to_cpu(jh->jh_journal.jp_journal_magic) !=
2788 sb_jp_journal_magic(rs))) {
2789 reiserfs_warning(sb, "sh-460",
2790 "journal header magic %x (device %pg) does "
2791 "not match to magic found in super block %x",
2792 jh->jh_journal.jp_journal_magic,
2793 journal->j_dev_bd,
2794 sb_jp_journal_magic(rs));
2795 brelse(bhjh);
2796 goto free_and_return;
2797 }
2798
2799 journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max);
2800 journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch);
2801 journal->j_max_commit_age =
2802 le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age);
2803 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
2804
2805 if (check_advise_trans_params(sb, journal) != 0)
2806 goto free_and_return;
2807 journal->j_default_max_commit_age = journal->j_max_commit_age;
2808
2809 if (commit_max_age != 0) {
2810 journal->j_max_commit_age = commit_max_age;
2811 journal->j_max_trans_age = commit_max_age;
2812 }
2813
2814 reiserfs_info(sb, "journal params: device %pg, size %u, "
2815 "journal first block %u, max trans len %u, max batch %u, "
2816 "max commit age %u, max trans age %u\n",
2817 journal->j_dev_bd,
2818 SB_ONDISK_JOURNAL_SIZE(sb),
2819 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2820 journal->j_trans_max,
2821 journal->j_max_batch,
2822 journal->j_max_commit_age, journal->j_max_trans_age);
2823
2824 brelse(bhjh);
2825
2826 journal->j_list_bitmap_index = 0;
2827 journal_list_init(sb);
2828
2829 memset(journal->j_list_hash_table, 0,
2830 JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
2831
2832 INIT_LIST_HEAD(&journal->j_dirty_buffers);
2833 spin_lock_init(&journal->j_dirty_buffers_lock);
2834
2835 journal->j_start = 0;
2836 journal->j_len = 0;
2837 journal->j_len_alloc = 0;
2838 atomic_set(&journal->j_wcount, 0);
2839 atomic_set(&journal->j_async_throttle, 0);
2840 journal->j_bcount = 0;
2841 journal->j_trans_start_time = 0;
2842 journal->j_last = NULL;
2843 journal->j_first = NULL;
2844 init_waitqueue_head(&journal->j_join_wait);
2845 mutex_init(&journal->j_mutex);
2846 mutex_init(&journal->j_flush_mutex);
2847
2848 journal->j_trans_id = 10;
2849 journal->j_mount_id = 10;
2850 journal->j_state = 0;
2851 atomic_set(&journal->j_jlock, 0);
2852 journal->j_cnode_free_list = allocate_cnodes(num_cnodes);
2853 journal->j_cnode_free_orig = journal->j_cnode_free_list;
2854 journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0;
2855 journal->j_cnode_used = 0;
2856 journal->j_must_wait = 0;
2857
2858 if (journal->j_cnode_free == 0) {
2859 reiserfs_warning(sb, "journal-2004", "Journal cnode memory "
2860 "allocation failed (%ld bytes). Journal is "
2861 "too large for available memory. Usually "
2862 "this is due to a journal that is too large.",
2863 sizeof (struct reiserfs_journal_cnode) * num_cnodes);
2864 goto free_and_return;
2865 }
2866
2867 init_journal_hash(sb);
2868 jl = journal->j_current_jl;
2869
2870
2871
2872
2873
2874
2875 reiserfs_write_lock(sb);
2876 jl->j_list_bitmap = get_list_bitmap(sb, jl);
2877 reiserfs_write_unlock(sb);
2878 if (!jl->j_list_bitmap) {
2879 reiserfs_warning(sb, "journal-2005",
2880 "get_list_bitmap failed for journal list 0");
2881 goto free_and_return;
2882 }
2883
2884 ret = journal_read(sb);
2885 if (ret < 0) {
2886 reiserfs_warning(sb, "reiserfs-2006",
2887 "Replay Failure, unable to mount");
2888 goto free_and_return;
2889 }
2890
2891 INIT_DELAYED_WORK(&journal->j_work, flush_async_commits);
2892 journal->j_work_sb = sb;
2893 return 0;
2894 free_and_return:
2895 free_journal_ram(sb);
2896 return 1;
2897 }
2898
2899
2900
2901
2902
2903
2904 int journal_transaction_should_end(struct reiserfs_transaction_handle *th,
2905 int new_alloc)
2906 {
2907 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2908 time64_t now = ktime_get_seconds();
2909
2910 BUG_ON(!th->t_trans_id);
2911 if (th->t_refcount > 1)
2912 return 0;
2913 if (journal->j_must_wait > 0 ||
2914 (journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
2915 atomic_read(&journal->j_jlock) ||
2916 (now - journal->j_trans_start_time) > journal->j_max_trans_age ||
2917 journal->j_cnode_free < (journal->j_trans_max * 3)) {
2918 return 1;
2919 }
2920
2921 journal->j_len_alloc += new_alloc;
2922 th->t_blocks_allocated += new_alloc ;
2923 return 0;
2924 }
2925
2926
2927 void reiserfs_block_writes(struct reiserfs_transaction_handle *th)
2928 {
2929 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2930 BUG_ON(!th->t_trans_id);
2931 journal->j_must_wait = 1;
2932 set_bit(J_WRITERS_BLOCKED, &journal->j_state);
2933 return;
2934 }
2935
2936
2937 void reiserfs_allow_writes(struct super_block *s)
2938 {
2939 struct reiserfs_journal *journal = SB_JOURNAL(s);
2940 clear_bit(J_WRITERS_BLOCKED, &journal->j_state);
2941 wake_up(&journal->j_join_wait);
2942 }
2943
2944
2945 void reiserfs_wait_on_write_block(struct super_block *s)
2946 {
2947 struct reiserfs_journal *journal = SB_JOURNAL(s);
2948 wait_event(journal->j_join_wait,
2949 !test_bit(J_WRITERS_BLOCKED, &journal->j_state));
2950 }
2951
2952 static void queue_log_writer(struct super_block *s)
2953 {
2954 wait_queue_entry_t wait;
2955 struct reiserfs_journal *journal = SB_JOURNAL(s);
2956 set_bit(J_WRITERS_QUEUED, &journal->j_state);
2957
2958
2959
2960
2961
2962 init_waitqueue_entry(&wait, current);
2963 add_wait_queue(&journal->j_join_wait, &wait);
2964 set_current_state(TASK_UNINTERRUPTIBLE);
2965 if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) {
2966 int depth = reiserfs_write_unlock_nested(s);
2967 schedule();
2968 reiserfs_write_lock_nested(s, depth);
2969 }
2970 __set_current_state(TASK_RUNNING);
2971 remove_wait_queue(&journal->j_join_wait, &wait);
2972 }
2973
2974 static void wake_queued_writers(struct super_block *s)
2975 {
2976 struct reiserfs_journal *journal = SB_JOURNAL(s);
2977 if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state))
2978 wake_up(&journal->j_join_wait);
2979 }
2980
2981 static void let_transaction_grow(struct super_block *sb, unsigned int trans_id)
2982 {
2983 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2984 unsigned long bcount = journal->j_bcount;
2985 while (1) {
2986 int depth;
2987
2988 depth = reiserfs_write_unlock_nested(sb);
2989 schedule_timeout_uninterruptible(1);
2990 reiserfs_write_lock_nested(sb, depth);
2991
2992 journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
2993 while ((atomic_read(&journal->j_wcount) > 0 ||
2994 atomic_read(&journal->j_jlock)) &&
2995 journal->j_trans_id == trans_id) {
2996 queue_log_writer(sb);
2997 }
2998 if (journal->j_trans_id != trans_id)
2999 break;
3000 if (bcount == journal->j_bcount)
3001 break;
3002 bcount = journal->j_bcount;
3003 }
3004 }
3005
3006
3007
3008
3009
3010
3011
3012
3013 static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
3014 struct super_block *sb, unsigned long nblocks,
3015 int join)
3016 {
3017 time64_t now = ktime_get_seconds();
3018 unsigned int old_trans_id;
3019 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3020 struct reiserfs_transaction_handle myth;
3021 int sched_count = 0;
3022 int retval;
3023 int depth;
3024
3025 reiserfs_check_lock_depth(sb, "journal_begin");
3026 BUG_ON(nblocks > journal->j_trans_max);
3027
3028 PROC_INFO_INC(sb, journal.journal_being);
3029
3030 th->t_refcount = 1;
3031 th->t_super = sb;
3032
3033 relock:
3034 lock_journal(sb);
3035 if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) {
3036 unlock_journal(sb);
3037 retval = journal->j_errno;
3038 goto out_fail;
3039 }
3040 journal->j_bcount++;
3041
3042 if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
3043 unlock_journal(sb);
3044 depth = reiserfs_write_unlock_nested(sb);
3045 reiserfs_wait_on_write_block(sb);
3046 reiserfs_write_lock_nested(sb, depth);
3047 PROC_INFO_INC(sb, journal.journal_relock_writers);
3048 goto relock;
3049 }
3050 now = ktime_get_seconds();
3051
3052
3053
3054
3055
3056
3057
3058
3059 if ((!join && journal->j_must_wait > 0) ||
3060 (!join
3061 && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch)
3062 || (!join && atomic_read(&journal->j_wcount) > 0
3063 && journal->j_trans_start_time > 0
3064 && (now - journal->j_trans_start_time) >
3065 journal->j_max_trans_age) || (!join
3066 && atomic_read(&journal->j_jlock))
3067 || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
3068
3069 old_trans_id = journal->j_trans_id;
3070
3071 unlock_journal(sb);
3072
3073 if (!join && (journal->j_len_alloc + nblocks + 2) >=
3074 journal->j_max_batch &&
3075 ((journal->j_len + nblocks + 2) * 100) <
3076 (journal->j_len_alloc * 75)) {
3077 if (atomic_read(&journal->j_wcount) > 10) {
3078 sched_count++;
3079 queue_log_writer(sb);
3080 goto relock;
3081 }
3082 }
3083
3084
3085
3086
3087 if (atomic_read(&journal->j_jlock)) {
3088 while (journal->j_trans_id == old_trans_id &&
3089 atomic_read(&journal->j_jlock)) {
3090 queue_log_writer(sb);
3091 }
3092 goto relock;
3093 }
3094 retval = journal_join(&myth, sb);
3095 if (retval)
3096 goto out_fail;
3097
3098
3099 if (old_trans_id != journal->j_trans_id) {
3100 retval = do_journal_end(&myth, 0);
3101 } else {
3102 retval = do_journal_end(&myth, COMMIT_NOW);
3103 }
3104
3105 if (retval)
3106 goto out_fail;
3107
3108 PROC_INFO_INC(sb, journal.journal_relock_wcount);
3109 goto relock;
3110 }
3111
3112 if (journal->j_trans_start_time == 0) {
3113 journal->j_trans_start_time = ktime_get_seconds();
3114 }
3115 atomic_inc(&journal->j_wcount);
3116 journal->j_len_alloc += nblocks;
3117 th->t_blocks_logged = 0;
3118 th->t_blocks_allocated = nblocks;
3119 th->t_trans_id = journal->j_trans_id;
3120 unlock_journal(sb);
3121 INIT_LIST_HEAD(&th->t_list);
3122 return 0;
3123
3124 out_fail:
3125 memset(th, 0, sizeof(*th));
3126
3127
3128
3129
3130
3131 th->t_super = sb;
3132 return retval;
3133 }
3134
3135 struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
3136 super_block
3137 *s,
3138 int nblocks)
3139 {
3140 int ret;
3141 struct reiserfs_transaction_handle *th;
3142
3143
3144
3145
3146
3147 if (reiserfs_transaction_running(s)) {
3148 th = current->journal_info;
3149 th->t_refcount++;
3150 BUG_ON(th->t_refcount < 2);
3151
3152 return th;
3153 }
3154 th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS);
3155 if (!th)
3156 return NULL;
3157 ret = journal_begin(th, s, nblocks);
3158 if (ret) {
3159 kfree(th);
3160 return NULL;
3161 }
3162
3163 SB_JOURNAL(s)->j_persistent_trans++;
3164 return th;
3165 }
3166
3167 int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th)
3168 {
3169 struct super_block *s = th->t_super;
3170 int ret = 0;
3171 if (th->t_trans_id)
3172 ret = journal_end(th);
3173 else
3174 ret = -EIO;
3175 if (th->t_refcount == 0) {
3176 SB_JOURNAL(s)->j_persistent_trans--;
3177 kfree(th);
3178 }
3179 return ret;
3180 }
3181
3182 static int journal_join(struct reiserfs_transaction_handle *th,
3183 struct super_block *sb)
3184 {
3185 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3186
3187
3188
3189
3190
3191 th->t_handle_save = cur_th;
3192 BUG_ON(cur_th && cur_th->t_refcount > 1);
3193 return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN);
3194 }
3195
3196 int journal_join_abort(struct reiserfs_transaction_handle *th,
3197 struct super_block *sb)
3198 {
3199 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3200
3201
3202
3203
3204
3205 th->t_handle_save = cur_th;
3206 BUG_ON(cur_th && cur_th->t_refcount > 1);
3207 return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT);
3208 }
3209
3210 int journal_begin(struct reiserfs_transaction_handle *th,
3211 struct super_block *sb, unsigned long nblocks)
3212 {
3213 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3214 int ret;
3215
3216 th->t_handle_save = NULL;
3217 if (cur_th) {
3218
3219 if (cur_th->t_super == sb) {
3220 BUG_ON(!cur_th->t_refcount);
3221 cur_th->t_refcount++;
3222 memcpy(th, cur_th, sizeof(*th));
3223 if (th->t_refcount <= 1)
3224 reiserfs_warning(sb, "reiserfs-2005",
3225 "BAD: refcount <= 1, but "
3226 "journal_info != 0");
3227 return 0;
3228 } else {
3229
3230
3231
3232
3233
3234 reiserfs_warning(sb, "clm-2100",
3235 "nesting info a different FS");
3236 th->t_handle_save = current->journal_info;
3237 current->journal_info = th;
3238 }
3239 } else {
3240 current->journal_info = th;
3241 }
3242 ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG);
3243 BUG_ON(current->journal_info != th);
3244
3245
3246
3247
3248
3249 if (ret)
3250 current->journal_info = th->t_handle_save;
3251 else
3252 BUG_ON(!th->t_refcount);
3253
3254 return ret;
3255 }
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267 int journal_mark_dirty(struct reiserfs_transaction_handle *th,
3268 struct buffer_head *bh)
3269 {
3270 struct super_block *sb = th->t_super;
3271 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3272 struct reiserfs_journal_cnode *cn = NULL;
3273 int count_already_incd = 0;
3274 int prepared = 0;
3275 BUG_ON(!th->t_trans_id);
3276
3277 PROC_INFO_INC(sb, journal.mark_dirty);
3278 if (th->t_trans_id != journal->j_trans_id) {
3279 reiserfs_panic(th->t_super, "journal-1577",
3280 "handle trans id %ld != current trans id %ld",
3281 th->t_trans_id, journal->j_trans_id);
3282 }
3283
3284 prepared = test_clear_buffer_journal_prepared(bh);
3285 clear_buffer_journal_restore_dirty(bh);
3286
3287 if (buffer_journaled(bh)) {
3288 PROC_INFO_INC(sb, journal.mark_dirty_already);
3289 return 0;
3290 }
3291
3292
3293
3294
3295
3296
3297 if (!prepared || buffer_dirty(bh)) {
3298 reiserfs_warning(sb, "journal-1777",
3299 "buffer %llu bad state "
3300 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3301 (unsigned long long)bh->b_blocknr,
3302 prepared ? ' ' : '!',
3303 buffer_locked(bh) ? ' ' : '!',
3304 buffer_dirty(bh) ? ' ' : '!',
3305 buffer_journal_dirty(bh) ? ' ' : '!');
3306 }
3307
3308 if (atomic_read(&journal->j_wcount) <= 0) {
3309 reiserfs_warning(sb, "journal-1409",
3310 "returning because j_wcount was %d",
3311 atomic_read(&journal->j_wcount));
3312 return 1;
3313 }
3314
3315
3316
3317
3318
3319 if (journal->j_len >= journal->j_trans_max) {
3320 reiserfs_panic(th->t_super, "journal-1413",
3321 "j_len (%lu) is too big",
3322 journal->j_len);
3323 }
3324
3325 if (buffer_journal_dirty(bh)) {
3326 count_already_incd = 1;
3327 PROC_INFO_INC(sb, journal.mark_dirty_notjournal);
3328 clear_buffer_journal_dirty(bh);
3329 }
3330
3331 if (journal->j_len > journal->j_len_alloc) {
3332 journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT;
3333 }
3334
3335 set_buffer_journaled(bh);
3336
3337
3338 if (!cn) {
3339 cn = get_cnode(sb);
3340 if (!cn) {
3341 reiserfs_panic(sb, "journal-4", "get_cnode failed!");
3342 }
3343
3344 if (th->t_blocks_logged == th->t_blocks_allocated) {
3345 th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT;
3346 journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT;
3347 }
3348 th->t_blocks_logged++;
3349 journal->j_len++;
3350
3351 cn->bh = bh;
3352 cn->blocknr = bh->b_blocknr;
3353 cn->sb = sb;
3354 cn->jlist = NULL;
3355 insert_journal_hash(journal->j_hash_table, cn);
3356 if (!count_already_incd) {
3357 get_bh(bh);
3358 }
3359 }
3360 cn->next = NULL;
3361 cn->prev = journal->j_last;
3362 cn->bh = bh;
3363 if (journal->j_last) {
3364 journal->j_last->next = cn;
3365 journal->j_last = cn;
3366 } else {
3367 journal->j_first = cn;
3368 journal->j_last = cn;
3369 }
3370 reiserfs_schedule_old_flush(sb);
3371 return 0;
3372 }
3373
3374 int journal_end(struct reiserfs_transaction_handle *th)
3375 {
3376 struct super_block *sb = th->t_super;
3377 if (!current->journal_info && th->t_refcount > 1)
3378 reiserfs_warning(sb, "REISER-NESTING",
3379 "th NULL, refcount %d", th->t_refcount);
3380
3381 if (!th->t_trans_id) {
3382 WARN_ON(1);
3383 return -EIO;
3384 }
3385
3386 th->t_refcount--;
3387 if (th->t_refcount > 0) {
3388 struct reiserfs_transaction_handle *cur_th =
3389 current->journal_info;
3390
3391
3392
3393
3394
3395 BUG_ON(cur_th->t_super != th->t_super);
3396
3397 if (th != cur_th) {
3398 memcpy(current->journal_info, th, sizeof(*th));
3399 th->t_trans_id = 0;
3400 }
3401 return 0;
3402 } else {
3403 return do_journal_end(th, 0);
3404 }
3405 }
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415 static int remove_from_transaction(struct super_block *sb,
3416 b_blocknr_t blocknr, int already_cleaned)
3417 {
3418 struct buffer_head *bh;
3419 struct reiserfs_journal_cnode *cn;
3420 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3421 int ret = 0;
3422
3423 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3424 if (!cn || !cn->bh) {
3425 return ret;
3426 }
3427 bh = cn->bh;
3428 if (cn->prev) {
3429 cn->prev->next = cn->next;
3430 }
3431 if (cn->next) {
3432 cn->next->prev = cn->prev;
3433 }
3434 if (cn == journal->j_first) {
3435 journal->j_first = cn->next;
3436 }
3437 if (cn == journal->j_last) {
3438 journal->j_last = cn->prev;
3439 }
3440 remove_journal_hash(sb, journal->j_hash_table, NULL,
3441 bh->b_blocknr, 0);
3442 clear_buffer_journaled(bh);
3443
3444 if (!already_cleaned) {
3445 clear_buffer_journal_dirty(bh);
3446 clear_buffer_dirty(bh);
3447 clear_buffer_journal_test(bh);
3448 put_bh(bh);
3449 if (atomic_read(&bh->b_count) < 0) {
3450 reiserfs_warning(sb, "journal-1752",
3451 "b_count < 0");
3452 }
3453 ret = 1;
3454 }
3455 journal->j_len--;
3456 journal->j_len_alloc--;
3457 free_cnode(sb, cn);
3458 return ret;
3459 }
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472 static int can_dirty(struct reiserfs_journal_cnode *cn)
3473 {
3474 struct super_block *sb = cn->sb;
3475 b_blocknr_t blocknr = cn->blocknr;
3476 struct reiserfs_journal_cnode *cur = cn->hprev;
3477 int can_dirty = 1;
3478
3479
3480
3481
3482
3483
3484 while (cur && can_dirty) {
3485 if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb &&
3486 cur->blocknr == blocknr) {
3487 can_dirty = 0;
3488 }
3489 cur = cur->hprev;
3490 }
3491
3492
3493
3494
3495 cur = cn->hnext;
3496 while (cur && can_dirty) {
3497 if (cur->jlist && cur->jlist->j_len > 0 &&
3498 atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh &&
3499 cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
3500 can_dirty = 0;
3501 }
3502 cur = cur->hnext;
3503 }
3504 return can_dirty;
3505 }
3506
3507
3508
3509
3510
3511 int journal_end_sync(struct reiserfs_transaction_handle *th)
3512 {
3513 struct super_block *sb = th->t_super;
3514 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3515
3516 BUG_ON(!th->t_trans_id);
3517
3518 BUG_ON(th->t_refcount > 1);
3519 if (journal->j_len == 0) {
3520 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3521 1);
3522 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
3523 }
3524 return do_journal_end(th, COMMIT_NOW | WAIT);
3525 }
3526
3527
3528 static void flush_async_commits(struct work_struct *work)
3529 {
3530 struct reiserfs_journal *journal =
3531 container_of(work, struct reiserfs_journal, j_work.work);
3532 struct super_block *sb = journal->j_work_sb;
3533 struct reiserfs_journal_list *jl;
3534 struct list_head *entry;
3535
3536 reiserfs_write_lock(sb);
3537 if (!list_empty(&journal->j_journal_list)) {
3538
3539 entry = journal->j_journal_list.prev;
3540 jl = JOURNAL_LIST_ENTRY(entry);
3541 flush_commit_list(sb, jl, 1);
3542 }
3543 reiserfs_write_unlock(sb);
3544 }
3545
3546
3547
3548
3549
3550 void reiserfs_flush_old_commits(struct super_block *sb)
3551 {
3552 time64_t now;
3553 struct reiserfs_transaction_handle th;
3554 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3555
3556 now = ktime_get_seconds();
3557
3558
3559
3560
3561 if (list_empty(&journal->j_journal_list))
3562 return;
3563
3564
3565
3566
3567
3568 if (atomic_read(&journal->j_wcount) <= 0 &&
3569 journal->j_trans_start_time > 0 &&
3570 journal->j_len > 0 &&
3571 (now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3572 if (!journal_join(&th, sb)) {
3573 reiserfs_prepare_for_journal(sb,
3574 SB_BUFFER_WITH_SB(sb),
3575 1);
3576 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3577
3578
3579
3580
3581
3582
3583 do_journal_end(&th, COMMIT_NOW | WAIT);
3584 }
3585 }
3586 }
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603 static int check_journal_end(struct reiserfs_transaction_handle *th, int flags)
3604 {
3605
3606 time64_t now;
3607 int flush = flags & FLUSH_ALL;
3608 int commit_now = flags & COMMIT_NOW;
3609 int wait_on_commit = flags & WAIT;
3610 struct reiserfs_journal_list *jl;
3611 struct super_block *sb = th->t_super;
3612 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3613
3614 BUG_ON(!th->t_trans_id);
3615
3616 if (th->t_trans_id != journal->j_trans_id) {
3617 reiserfs_panic(th->t_super, "journal-1577",
3618 "handle trans id %ld != current trans id %ld",
3619 th->t_trans_id, journal->j_trans_id);
3620 }
3621
3622 journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged);
3623
3624 if (atomic_read(&journal->j_wcount) > 0)
3625 atomic_dec(&journal->j_wcount);
3626
3627
3628
3629
3630
3631
3632
3633 BUG_ON(journal->j_len == 0);
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643 if (atomic_read(&journal->j_wcount) > 0) {
3644 if (flush || commit_now) {
3645 unsigned trans_id;
3646
3647 jl = journal->j_current_jl;
3648 trans_id = jl->j_trans_id;
3649 if (wait_on_commit)
3650 jl->j_state |= LIST_COMMIT_PENDING;
3651 atomic_set(&journal->j_jlock, 1);
3652 if (flush) {
3653 journal->j_next_full_flush = 1;
3654 }
3655 unlock_journal(sb);
3656
3657
3658
3659
3660
3661 while (journal->j_trans_id == trans_id) {
3662 if (atomic_read(&journal->j_jlock)) {
3663 queue_log_writer(sb);
3664 } else {
3665 lock_journal(sb);
3666 if (journal->j_trans_id == trans_id) {
3667 atomic_set(&journal->j_jlock,
3668 1);
3669 }
3670 unlock_journal(sb);
3671 }
3672 }
3673 BUG_ON(journal->j_trans_id == trans_id);
3674
3675 if (commit_now
3676 && journal_list_still_alive(sb, trans_id)
3677 && wait_on_commit) {
3678 flush_commit_list(sb, jl, 1);
3679 }
3680 return 0;
3681 }
3682 unlock_journal(sb);
3683 return 0;
3684 }
3685
3686
3687 now = ktime_get_seconds();
3688 if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3689 commit_now = 1;
3690 journal->j_next_async_flush = 1;
3691 }
3692
3693
3694 if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock))
3695 && !flush && !commit_now && (journal->j_len < journal->j_max_batch)
3696 && journal->j_len_alloc < journal->j_max_batch
3697 && journal->j_cnode_free > (journal->j_trans_max * 3)) {
3698 journal->j_bcount++;
3699 unlock_journal(sb);
3700 return 0;
3701 }
3702
3703 if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) {
3704 reiserfs_panic(sb, "journal-003",
3705 "j_start (%ld) is too high",
3706 journal->j_start);
3707 }
3708 return 1;
3709 }
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728 int journal_mark_freed(struct reiserfs_transaction_handle *th,
3729 struct super_block *sb, b_blocknr_t blocknr)
3730 {
3731 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3732 struct reiserfs_journal_cnode *cn = NULL;
3733 struct buffer_head *bh = NULL;
3734 struct reiserfs_list_bitmap *jb = NULL;
3735 int cleaned = 0;
3736 BUG_ON(!th->t_trans_id);
3737
3738 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3739 if (cn && cn->bh) {
3740 bh = cn->bh;
3741 get_bh(bh);
3742 }
3743
3744 if (bh && buffer_journal_new(bh)) {
3745 clear_buffer_journal_new(bh);
3746 clear_prepared_bits(bh);
3747 reiserfs_clean_and_file_buffer(bh);
3748 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3749 } else {
3750
3751
3752
3753
3754 jb = journal->j_current_jl->j_list_bitmap;
3755 if (!jb) {
3756 reiserfs_panic(sb, "journal-1702",
3757 "journal_list_bitmap is NULL");
3758 }
3759 set_bit_in_list_bitmap(sb, blocknr, jb);
3760
3761
3762
3763 if (bh) {
3764 clear_prepared_bits(bh);
3765 reiserfs_clean_and_file_buffer(bh);
3766 }
3767 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3768
3769
3770
3771
3772
3773 cn = get_journal_hash_dev(sb, journal->j_list_hash_table,
3774 blocknr);
3775 while (cn) {
3776 if (sb == cn->sb && blocknr == cn->blocknr) {
3777 set_bit(BLOCK_FREED, &cn->state);
3778 if (cn->bh) {
3779
3780
3781
3782
3783
3784 if (!cleaned) {
3785 clear_buffer_journal_dirty(cn->
3786 bh);
3787 clear_buffer_dirty(cn->bh);
3788 clear_buffer_journal_test(cn->
3789 bh);
3790 cleaned = 1;
3791 put_bh(cn->bh);
3792 if (atomic_read
3793 (&cn->bh->b_count) < 0) {
3794 reiserfs_warning(sb,
3795 "journal-2138",
3796 "cn->bh->b_count < 0");
3797 }
3798 }
3799
3800
3801
3802
3803 if (cn->jlist) {
3804 atomic_dec(&cn->jlist->
3805 j_nonzerolen);
3806 }
3807 cn->bh = NULL;
3808 }
3809 }
3810 cn = cn->hnext;
3811 }
3812 }
3813
3814 if (bh)
3815 release_buffer_page(bh);
3816 return 0;
3817 }
3818
3819 void reiserfs_update_inode_transaction(struct inode *inode)
3820 {
3821 struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb);
3822 REISERFS_I(inode)->i_jl = journal->j_current_jl;
3823 REISERFS_I(inode)->i_trans_id = journal->j_trans_id;
3824 }
3825
3826
3827
3828
3829
3830 static int __commit_trans_jl(struct inode *inode, unsigned long id,
3831 struct reiserfs_journal_list *jl)
3832 {
3833 struct reiserfs_transaction_handle th;
3834 struct super_block *sb = inode->i_sb;
3835 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3836 int ret = 0;
3837
3838
3839
3840
3841
3842 if (id == journal->j_trans_id) {
3843 jl = journal->j_current_jl;
3844
3845
3846
3847
3848 let_transaction_grow(sb, id);
3849 if (journal->j_trans_id != id) {
3850 goto flush_commit_only;
3851 }
3852
3853 ret = journal_begin(&th, sb, 1);
3854 if (ret)
3855 return ret;
3856
3857
3858 if (journal->j_trans_id != id) {
3859 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3860 1);
3861 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3862 ret = journal_end(&th);
3863 goto flush_commit_only;
3864 }
3865
3866 ret = journal_end_sync(&th);
3867 if (!ret)
3868 ret = 1;
3869
3870 } else {
3871
3872
3873
3874
3875
3876 flush_commit_only:
3877 if (journal_list_still_alive(inode->i_sb, id)) {
3878
3879
3880
3881
3882
3883 if (atomic_read(&jl->j_commit_left) > 1)
3884 ret = 1;
3885 flush_commit_list(sb, jl, 1);
3886 if (journal->j_errno)
3887 ret = journal->j_errno;
3888 }
3889 }
3890
3891 return ret;
3892 }
3893
3894 int reiserfs_commit_for_inode(struct inode *inode)
3895 {
3896 unsigned int id = REISERFS_I(inode)->i_trans_id;
3897 struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
3898
3899
3900
3901
3902
3903 if (!id || !jl) {
3904 reiserfs_update_inode_transaction(inode);
3905 id = REISERFS_I(inode)->i_trans_id;
3906
3907 }
3908
3909 return __commit_trans_jl(inode, id, jl);
3910 }
3911
3912 void reiserfs_restore_prepared_buffer(struct super_block *sb,
3913 struct buffer_head *bh)
3914 {
3915 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3916 PROC_INFO_INC(sb, journal.restore_prepared);
3917 if (!bh) {
3918 return;
3919 }
3920 if (test_clear_buffer_journal_restore_dirty(bh) &&
3921 buffer_journal_dirty(bh)) {
3922 struct reiserfs_journal_cnode *cn;
3923 reiserfs_write_lock(sb);
3924 cn = get_journal_hash_dev(sb,
3925 journal->j_list_hash_table,
3926 bh->b_blocknr);
3927 if (cn && can_dirty(cn)) {
3928 set_buffer_journal_test(bh);
3929 mark_buffer_dirty(bh);
3930 }
3931 reiserfs_write_unlock(sb);
3932 }
3933 clear_buffer_journal_prepared(bh);
3934 }
3935
3936 extern struct tree_balance *cur_tb;
3937
3938
3939
3940
3941
3942
3943 int reiserfs_prepare_for_journal(struct super_block *sb,
3944 struct buffer_head *bh, int wait)
3945 {
3946 PROC_INFO_INC(sb, journal.prepare);
3947
3948 if (!trylock_buffer(bh)) {
3949 if (!wait)
3950 return 0;
3951 lock_buffer(bh);
3952 }
3953 set_buffer_journal_prepared(bh);
3954 if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) {
3955 clear_buffer_journal_test(bh);
3956 set_buffer_journal_restore_dirty(bh);
3957 }
3958 unlock_buffer(bh);
3959 return 1;
3960 }
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972 static int do_journal_end(struct reiserfs_transaction_handle *th, int flags)
3973 {
3974 struct super_block *sb = th->t_super;
3975 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3976 struct reiserfs_journal_cnode *cn, *next, *jl_cn;
3977 struct reiserfs_journal_cnode *last_cn = NULL;
3978 struct reiserfs_journal_desc *desc;
3979 struct reiserfs_journal_commit *commit;
3980 struct buffer_head *c_bh;
3981 struct buffer_head *d_bh;
3982 int cur_write_start = 0;
3983 int i;
3984 int flush;
3985 int wait_on_commit;
3986 struct reiserfs_journal_list *jl, *temp_jl;
3987 struct list_head *entry, *safe;
3988 unsigned long jindex;
3989 unsigned int commit_trans_id;
3990 int trans_half;
3991 int depth;
3992
3993 BUG_ON(th->t_refcount > 1);
3994 BUG_ON(!th->t_trans_id);
3995 BUG_ON(!th->t_super);
3996
3997
3998
3999
4000
4001 if (th->t_trans_id == ~0U)
4002 flags |= FLUSH_ALL | COMMIT_NOW | WAIT;
4003 flush = flags & FLUSH_ALL;
4004 wait_on_commit = flags & WAIT;
4005
4006 current->journal_info = th->t_handle_save;
4007 reiserfs_check_lock_depth(sb, "journal end");
4008 if (journal->j_len == 0) {
4009 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
4010 1);
4011 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
4012 }
4013
4014 lock_journal(sb);
4015 if (journal->j_next_full_flush) {
4016 flags |= FLUSH_ALL;
4017 flush = 1;
4018 }
4019 if (journal->j_next_async_flush) {
4020 flags |= COMMIT_NOW | WAIT;
4021 wait_on_commit = 1;
4022 }
4023
4024
4025
4026
4027
4028
4029 if (!check_journal_end(th, flags)) {
4030 reiserfs_schedule_old_flush(sb);
4031 wake_queued_writers(sb);
4032 reiserfs_async_progress_wait(sb);
4033 goto out;
4034 }
4035
4036
4037 if (journal->j_next_full_flush) {
4038 flush = 1;
4039 }
4040
4041
4042
4043
4044
4045 if (journal->j_must_wait > 0) {
4046 flush = 1;
4047 }
4048 #ifdef REISERFS_PREALLOCATE
4049
4050
4051
4052
4053 current->journal_info = th;
4054 th->t_refcount++;
4055
4056
4057 reiserfs_discard_all_prealloc(th);
4058
4059 th->t_refcount--;
4060 current->journal_info = th->t_handle_save;
4061 #endif
4062
4063
4064 d_bh =
4065 journal_getblk(sb,
4066 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4067 journal->j_start);
4068 set_buffer_uptodate(d_bh);
4069 desc = (struct reiserfs_journal_desc *)(d_bh)->b_data;
4070 memset(d_bh->b_data, 0, d_bh->b_size);
4071 memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8);
4072 set_desc_trans_id(desc, journal->j_trans_id);
4073
4074
4075
4076
4077
4078 c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4079 ((journal->j_start + journal->j_len +
4080 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
4081 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
4082 memset(c_bh->b_data, 0, c_bh->b_size);
4083 set_commit_trans_id(commit, journal->j_trans_id);
4084 set_buffer_uptodate(c_bh);
4085
4086
4087 jl = journal->j_current_jl;
4088
4089
4090
4091
4092
4093
4094
4095 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb);
4096
4097
4098 commit_trans_id = jl->j_trans_id;
4099
4100 atomic_set(&jl->j_older_commits_done, 0);
4101 jl->j_trans_id = journal->j_trans_id;
4102 jl->j_timestamp = journal->j_trans_start_time;
4103 jl->j_commit_bh = c_bh;
4104 jl->j_start = journal->j_start;
4105 jl->j_len = journal->j_len;
4106 atomic_set(&jl->j_nonzerolen, journal->j_len);
4107 atomic_set(&jl->j_commit_left, journal->j_len + 2);
4108 jl->j_realblock = NULL;
4109
4110
4111
4112
4113
4114
4115 trans_half = journal_trans_half(sb->s_blocksize);
4116 for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) {
4117 if (buffer_journaled(cn->bh)) {
4118 jl_cn = get_cnode(sb);
4119 if (!jl_cn) {
4120 reiserfs_panic(sb, "journal-1676",
4121 "get_cnode returned NULL");
4122 }
4123 if (i == 0) {
4124 jl->j_realblock = jl_cn;
4125 }
4126 jl_cn->prev = last_cn;
4127 jl_cn->next = NULL;
4128 if (last_cn) {
4129 last_cn->next = jl_cn;
4130 }
4131 last_cn = jl_cn;
4132
4133
4134
4135
4136 if (is_block_in_log_or_reserved_area
4137 (sb, cn->bh->b_blocknr)) {
4138 reiserfs_panic(sb, "journal-2332",
4139 "Trying to log block %lu, "
4140 "which is a log block",
4141 cn->bh->b_blocknr);
4142 }
4143 jl_cn->blocknr = cn->bh->b_blocknr;
4144 jl_cn->state = 0;
4145 jl_cn->sb = sb;
4146 jl_cn->bh = cn->bh;
4147 jl_cn->jlist = jl;
4148 insert_journal_hash(journal->j_list_hash_table, jl_cn);
4149 if (i < trans_half) {
4150 desc->j_realblock[i] =
4151 cpu_to_le32(cn->bh->b_blocknr);
4152 } else {
4153 commit->j_realblock[i - trans_half] =
4154 cpu_to_le32(cn->bh->b_blocknr);
4155 }
4156 } else {
4157 i--;
4158 }
4159 }
4160 set_desc_trans_len(desc, journal->j_len);
4161 set_desc_mount_id(desc, journal->j_mount_id);
4162 set_desc_trans_id(desc, journal->j_trans_id);
4163 set_commit_trans_len(commit, journal->j_len);
4164
4165
4166
4167
4168
4169 BUG_ON(journal->j_len == 0);
4170
4171
4172
4173
4174
4175
4176 mark_buffer_dirty(d_bh);
4177
4178
4179
4180
4181
4182 cur_write_start = journal->j_start;
4183 cn = journal->j_first;
4184 jindex = 1;
4185 while (cn) {
4186 clear_buffer_journal_new(cn->bh);
4187
4188 if (buffer_journaled(cn->bh)) {
4189 struct buffer_head *tmp_bh;
4190 char *addr;
4191 struct page *page;
4192 tmp_bh =
4193 journal_getblk(sb,
4194 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4195 ((cur_write_start +
4196 jindex) %
4197 SB_ONDISK_JOURNAL_SIZE(sb)));
4198 set_buffer_uptodate(tmp_bh);
4199 page = cn->bh->b_page;
4200 addr = kmap(page);
4201 memcpy(tmp_bh->b_data,
4202 addr + offset_in_page(cn->bh->b_data),
4203 cn->bh->b_size);
4204 kunmap(page);
4205 mark_buffer_dirty(tmp_bh);
4206 jindex++;
4207 set_buffer_journal_dirty(cn->bh);
4208 clear_buffer_journaled(cn->bh);
4209 } else {
4210
4211
4212
4213
4214 reiserfs_warning(sb, "journal-2048",
4215 "BAD, buffer in journal hash, "
4216 "but not JDirty!");
4217 brelse(cn->bh);
4218 }
4219 next = cn->next;
4220 free_cnode(sb, cn);
4221 cn = next;
4222 reiserfs_cond_resched(sb);
4223 }
4224
4225
4226
4227
4228
4229
4230
4231 journal->j_current_jl = alloc_journal_list(sb);
4232
4233
4234 list_add_tail(&jl->j_list, &journal->j_journal_list);
4235 list_add_tail(&jl->j_working_list, &journal->j_working_list);
4236 journal->j_num_work_lists++;
4237
4238
4239 journal->j_start =
4240 (journal->j_start + journal->j_len +
4241 2) % SB_ONDISK_JOURNAL_SIZE(sb);
4242 atomic_set(&journal->j_wcount, 0);
4243 journal->j_bcount = 0;
4244 journal->j_last = NULL;
4245 journal->j_first = NULL;
4246 journal->j_len = 0;
4247 journal->j_trans_start_time = 0;
4248
4249 if (++journal->j_trans_id == 0)
4250 journal->j_trans_id = 10;
4251 journal->j_current_jl->j_trans_id = journal->j_trans_id;
4252 journal->j_must_wait = 0;
4253 journal->j_len_alloc = 0;
4254 journal->j_next_full_flush = 0;
4255 journal->j_next_async_flush = 0;
4256 init_journal_hash(sb);
4257
4258
4259
4260
4261
4262 smp_mb();
4263
4264
4265
4266
4267
4268
4269
4270
4271 if (!list_empty(&jl->j_tail_bh_list)) {
4272 depth = reiserfs_write_unlock_nested(sb);
4273 write_ordered_buffers(&journal->j_dirty_buffers_lock,
4274 journal, jl, &jl->j_tail_bh_list);
4275 reiserfs_write_lock_nested(sb, depth);
4276 }
4277 BUG_ON(!list_empty(&jl->j_tail_bh_list));
4278 mutex_unlock(&jl->j_commit_mutex);
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288 if (flush) {
4289 flush_commit_list(sb, jl, 1);
4290 flush_journal_list(sb, jl, 1);
4291 } else if (!(jl->j_state & LIST_COMMIT_PENDING)) {
4292
4293
4294
4295
4296 if (sb->s_flags & SB_ACTIVE)
4297 queue_delayed_work(REISERFS_SB(sb)->commit_wq,
4298 &journal->j_work, HZ / 10);
4299 }
4300
4301
4302
4303
4304
4305
4306 first_jl:
4307 list_for_each_safe(entry, safe, &journal->j_journal_list) {
4308 temp_jl = JOURNAL_LIST_ENTRY(entry);
4309 if (journal->j_start <= temp_jl->j_start) {
4310 if ((journal->j_start + journal->j_trans_max + 1) >=
4311 temp_jl->j_start) {
4312 flush_used_journal_lists(sb, temp_jl);
4313 goto first_jl;
4314 } else if ((journal->j_start +
4315 journal->j_trans_max + 1) <
4316 SB_ONDISK_JOURNAL_SIZE(sb)) {
4317
4318
4319
4320
4321
4322
4323 break;
4324 }
4325 } else if ((journal->j_start +
4326 journal->j_trans_max + 1) >
4327 SB_ONDISK_JOURNAL_SIZE(sb)) {
4328 if (((journal->j_start + journal->j_trans_max + 1) %
4329 SB_ONDISK_JOURNAL_SIZE(sb)) >=
4330 temp_jl->j_start) {
4331 flush_used_journal_lists(sb, temp_jl);
4332 goto first_jl;
4333 } else {
4334
4335
4336
4337
4338
4339
4340 break;
4341 }
4342 }
4343 }
4344
4345 journal->j_current_jl->j_list_bitmap =
4346 get_list_bitmap(sb, journal->j_current_jl);
4347
4348 if (!(journal->j_current_jl->j_list_bitmap)) {
4349 reiserfs_panic(sb, "journal-1996",
4350 "could not get a list bitmap");
4351 }
4352
4353 atomic_set(&journal->j_jlock, 0);
4354 unlock_journal(sb);
4355
4356 clear_bit(J_WRITERS_QUEUED, &journal->j_state);
4357 wake_up(&journal->j_join_wait);
4358
4359 if (!flush && wait_on_commit &&
4360 journal_list_still_alive(sb, commit_trans_id)) {
4361 flush_commit_list(sb, jl, 1);
4362 }
4363 out:
4364 reiserfs_check_lock_depth(sb, "journal end2");
4365
4366 memset(th, 0, sizeof(*th));
4367
4368
4369
4370
4371
4372 th->t_super = sb;
4373
4374 return journal->j_errno;
4375 }
4376
4377
4378 void reiserfs_abort_journal(struct super_block *sb, int errno)
4379 {
4380 struct reiserfs_journal *journal = SB_JOURNAL(sb);
4381 if (test_bit(J_ABORTED, &journal->j_state))
4382 return;
4383
4384 if (!journal->j_errno)
4385 journal->j_errno = errno;
4386
4387 sb->s_flags |= SB_RDONLY;
4388 set_bit(J_ABORTED, &journal->j_state);
4389
4390 #ifdef CONFIG_REISERFS_CHECK
4391 dump_stack();
4392 #endif
4393 }