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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
87static int do_journal_end(struct reiserfs_transaction_handle *, int flags);
88static int flush_journal_list(struct super_block *s,
89 struct reiserfs_journal_list *jl, int flushall);
90static int flush_commit_list(struct super_block *s,
91 struct reiserfs_journal_list *jl, int flushall);
92static int can_dirty(struct reiserfs_journal_cnode *cn);
93static int journal_join(struct reiserfs_transaction_handle *th,
94 struct super_block *sb);
95static void release_journal_dev(struct super_block *super,
96 struct reiserfs_journal *journal);
97static void dirty_one_transaction(struct super_block *s,
98 struct reiserfs_journal_list *jl);
99static void flush_async_commits(struct work_struct *work);
100static void queue_log_writer(struct super_block *s);
101
102
103enum {
104 JBEGIN_REG = 0,
105
106 JBEGIN_JOIN = 1,
107
108 JBEGIN_ABORT = 2,
109};
110
111static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
112 struct super_block *sb,
113 unsigned long nblocks, int join);
114
115static 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
128static 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
137static 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
157static 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++;
164repeat:
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}
180static 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
194static 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
211static 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
225static 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
243static 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
258static 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
280int 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
311static 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
346static 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
369static 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
396static 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
414static 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
424static 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
461int 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
519static 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
534static 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
542static inline void unlock_journal(struct super_block *sb)
543{
544 mutex_unlock(&SB_JOURNAL(sb)->j_mutex);
545}
546
547static inline void get_journal_list(struct reiserfs_journal_list *jl)
548{
549 jl->j_refcount++;
550}
551
552static 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
568static 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
580static 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
606static 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
621static 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
637static 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
647static 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
660static 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
671struct buffer_chunk {
672 struct buffer_head *bh[CHUNK_SIZE];
673 int nr;
674};
675
676static 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
685static 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
694static 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
713static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0);
714static 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
731void 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
748static 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 {
762no_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
784int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh)
785{
786 return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1);
787}
788int 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)
794static 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 }
841loop_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
885static 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 unsigned int first_trans_id;
895
896find_first:
897
898
899
900 first_jl = jl;
901 entry = jl->j_list.prev;
902 while (1) {
903 other_jl = JOURNAL_LIST_ENTRY(entry);
904 if (entry == &journal->j_journal_list ||
905 atomic_read(&other_jl->j_older_commits_done))
906 break;
907
908 first_jl = other_jl;
909 entry = other_jl->j_list.prev;
910 }
911
912
913 if (first_jl == jl) {
914 return 0;
915 }
916
917 first_trans_id = first_jl->j_trans_id;
918
919 entry = &first_jl->j_list;
920 while (1) {
921 other_jl = JOURNAL_LIST_ENTRY(entry);
922 other_trans_id = other_jl->j_trans_id;
923
924 if (other_trans_id < trans_id) {
925 if (atomic_read(&other_jl->j_commit_left) != 0) {
926 flush_commit_list(s, other_jl, 0);
927
928
929 if (!journal_list_still_alive(s, trans_id))
930 return 1;
931
932
933
934
935
936
937
938 if (!journal_list_still_alive
939 (s, other_trans_id)) {
940 goto find_first;
941 }
942 }
943 entry = entry->next;
944 if (entry == &journal->j_journal_list)
945 return 0;
946 } else {
947 return 0;
948 }
949 }
950 return 0;
951}
952
953static int reiserfs_async_progress_wait(struct super_block *s)
954{
955 struct reiserfs_journal *j = SB_JOURNAL(s);
956
957 if (atomic_read(&j->j_async_throttle)) {
958 int depth;
959
960 depth = reiserfs_write_unlock_nested(s);
961 congestion_wait(BLK_RW_ASYNC, HZ / 10);
962 reiserfs_write_lock_nested(s, depth);
963 }
964
965 return 0;
966}
967
968
969
970
971
972
973
974
975static int flush_commit_list(struct super_block *s,
976 struct reiserfs_journal_list *jl, int flushall)
977{
978 int i;
979 b_blocknr_t bn;
980 struct buffer_head *tbh = NULL;
981 unsigned int trans_id = jl->j_trans_id;
982 struct reiserfs_journal *journal = SB_JOURNAL(s);
983 int retval = 0;
984 int write_len;
985 int depth;
986
987 reiserfs_check_lock_depth(s, "flush_commit_list");
988
989 if (atomic_read(&jl->j_older_commits_done)) {
990 return 0;
991 }
992
993
994
995
996
997 BUG_ON(jl->j_len <= 0);
998 BUG_ON(trans_id == journal->j_trans_id);
999
1000 get_journal_list(jl);
1001 if (flushall) {
1002 if (flush_older_commits(s, jl) == 1) {
1003
1004
1005
1006
1007 goto put_jl;
1008 }
1009 }
1010
1011
1012 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s);
1013
1014 if (!journal_list_still_alive(s, trans_id)) {
1015 mutex_unlock(&jl->j_commit_mutex);
1016 goto put_jl;
1017 }
1018 BUG_ON(jl->j_trans_id == 0);
1019
1020
1021 if (atomic_read(&jl->j_commit_left) <= 0) {
1022 if (flushall) {
1023 atomic_set(&jl->j_older_commits_done, 1);
1024 }
1025 mutex_unlock(&jl->j_commit_mutex);
1026 goto put_jl;
1027 }
1028
1029 if (!list_empty(&jl->j_bh_list)) {
1030 int ret;
1031
1032
1033
1034
1035
1036 depth = reiserfs_write_unlock_nested(s);
1037 ret = write_ordered_buffers(&journal->j_dirty_buffers_lock,
1038 journal, jl, &jl->j_bh_list);
1039 if (ret < 0 && retval == 0)
1040 retval = ret;
1041 reiserfs_write_lock_nested(s, depth);
1042 }
1043 BUG_ON(!list_empty(&jl->j_bh_list));
1044
1045
1046
1047
1048
1049
1050
1051 atomic_inc(&journal->j_async_throttle);
1052 write_len = jl->j_len + 1;
1053 if (write_len < 256)
1054 write_len = 256;
1055 for (i = 0 ; i < write_len ; i++) {
1056 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) %
1057 SB_ONDISK_JOURNAL_SIZE(s);
1058 tbh = journal_find_get_block(s, bn);
1059 if (tbh) {
1060 if (buffer_dirty(tbh)) {
1061 depth = reiserfs_write_unlock_nested(s);
1062 ll_rw_block(REQ_OP_WRITE, 0, 1, &tbh);
1063 reiserfs_write_lock_nested(s, depth);
1064 }
1065 put_bh(tbh) ;
1066 }
1067 }
1068 atomic_dec(&journal->j_async_throttle);
1069
1070 for (i = 0; i < (jl->j_len + 1); i++) {
1071 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) +
1072 (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s);
1073 tbh = journal_find_get_block(s, bn);
1074
1075 depth = reiserfs_write_unlock_nested(s);
1076 __wait_on_buffer(tbh);
1077 reiserfs_write_lock_nested(s, depth);
1078
1079
1080
1081
1082
1083 if (buffer_dirty(tbh)) {
1084 depth = reiserfs_write_unlock_nested(s);
1085 sync_dirty_buffer(tbh);
1086 reiserfs_write_lock_nested(s, depth);
1087 }
1088 if (unlikely(!buffer_uptodate(tbh))) {
1089#ifdef CONFIG_REISERFS_CHECK
1090 reiserfs_warning(s, "journal-601",
1091 "buffer write failed");
1092#endif
1093 retval = -EIO;
1094 }
1095
1096 put_bh(tbh);
1097
1098 put_bh(tbh);
1099 atomic_dec(&jl->j_commit_left);
1100 }
1101
1102 BUG_ON(atomic_read(&jl->j_commit_left) != 1);
1103
1104
1105
1106
1107
1108
1109
1110 if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
1111 if (buffer_dirty(jl->j_commit_bh))
1112 BUG();
1113 mark_buffer_dirty(jl->j_commit_bh) ;
1114 depth = reiserfs_write_unlock_nested(s);
1115 if (reiserfs_barrier_flush(s))
1116 __sync_dirty_buffer(jl->j_commit_bh,
1117 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1118 else
1119 sync_dirty_buffer(jl->j_commit_bh);
1120 reiserfs_write_lock_nested(s, depth);
1121 }
1122
1123
1124
1125
1126
1127
1128 if (unlikely(!buffer_uptodate(jl->j_commit_bh))) {
1129#ifdef CONFIG_REISERFS_CHECK
1130 reiserfs_warning(s, "journal-615", "buffer write failed");
1131#endif
1132 retval = -EIO;
1133 }
1134 bforget(jl->j_commit_bh);
1135 if (journal->j_last_commit_id != 0 &&
1136 (jl->j_trans_id - journal->j_last_commit_id) != 1) {
1137 reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu",
1138 journal->j_last_commit_id, jl->j_trans_id);
1139 }
1140 journal->j_last_commit_id = jl->j_trans_id;
1141
1142
1143
1144
1145
1146 cleanup_freed_for_journal_list(s, jl);
1147
1148 retval = retval ? retval : journal->j_errno;
1149
1150
1151 if (!retval)
1152 dirty_one_transaction(s, jl);
1153 atomic_dec(&jl->j_commit_left);
1154
1155 if (flushall) {
1156 atomic_set(&jl->j_older_commits_done, 1);
1157 }
1158 mutex_unlock(&jl->j_commit_mutex);
1159put_jl:
1160 put_journal_list(s, jl);
1161
1162 if (retval)
1163 reiserfs_abort(s, retval, "Journal write error in %s",
1164 __func__);
1165 return retval;
1166}
1167
1168
1169
1170
1171
1172static struct reiserfs_journal_list *find_newer_jl_for_cn(struct
1173 reiserfs_journal_cnode
1174 *cn)
1175{
1176 struct super_block *sb = cn->sb;
1177 b_blocknr_t blocknr = cn->blocknr;
1178
1179 cn = cn->hprev;
1180 while (cn) {
1181 if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) {
1182 return cn->jlist;
1183 }
1184 cn = cn->hprev;
1185 }
1186 return NULL;
1187}
1188
1189static void remove_journal_hash(struct super_block *,
1190 struct reiserfs_journal_cnode **,
1191 struct reiserfs_journal_list *, unsigned long,
1192 int);
1193
1194
1195
1196
1197
1198
1199
1200static void remove_all_from_journal_list(struct super_block *sb,
1201 struct reiserfs_journal_list *jl,
1202 int debug)
1203{
1204 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1205 struct reiserfs_journal_cnode *cn, *last;
1206 cn = jl->j_realblock;
1207
1208
1209
1210
1211
1212 while (cn) {
1213 if (cn->blocknr != 0) {
1214 if (debug) {
1215 reiserfs_warning(sb, "reiserfs-2201",
1216 "block %u, bh is %d, state %ld",
1217 cn->blocknr, cn->bh ? 1 : 0,
1218 cn->state);
1219 }
1220 cn->state = 0;
1221 remove_journal_hash(sb, journal->j_list_hash_table,
1222 jl, cn->blocknr, 1);
1223 }
1224 last = cn;
1225 cn = cn->next;
1226 free_cnode(sb, last);
1227 }
1228 jl->j_realblock = NULL;
1229}
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239static int _update_journal_header_block(struct super_block *sb,
1240 unsigned long offset,
1241 unsigned int trans_id)
1242{
1243 struct reiserfs_journal_header *jh;
1244 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1245 int depth;
1246
1247 if (reiserfs_is_journal_aborted(journal))
1248 return -EIO;
1249
1250 if (trans_id >= journal->j_last_flush_trans_id) {
1251 if (buffer_locked((journal->j_header_bh))) {
1252 depth = reiserfs_write_unlock_nested(sb);
1253 __wait_on_buffer(journal->j_header_bh);
1254 reiserfs_write_lock_nested(sb, depth);
1255 if (unlikely(!buffer_uptodate(journal->j_header_bh))) {
1256#ifdef CONFIG_REISERFS_CHECK
1257 reiserfs_warning(sb, "journal-699",
1258 "buffer write failed");
1259#endif
1260 return -EIO;
1261 }
1262 }
1263 journal->j_last_flush_trans_id = trans_id;
1264 journal->j_first_unflushed_offset = offset;
1265 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->
1266 b_data);
1267 jh->j_last_flush_trans_id = cpu_to_le32(trans_id);
1268 jh->j_first_unflushed_offset = cpu_to_le32(offset);
1269 jh->j_mount_id = cpu_to_le32(journal->j_mount_id);
1270
1271 set_buffer_dirty(journal->j_header_bh);
1272 depth = reiserfs_write_unlock_nested(sb);
1273
1274 if (reiserfs_barrier_flush(sb))
1275 __sync_dirty_buffer(journal->j_header_bh,
1276 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1277 else
1278 sync_dirty_buffer(journal->j_header_bh);
1279
1280 reiserfs_write_lock_nested(sb, depth);
1281 if (!buffer_uptodate(journal->j_header_bh)) {
1282 reiserfs_warning(sb, "journal-837",
1283 "IO error during journal replay");
1284 return -EIO;
1285 }
1286 }
1287 return 0;
1288}
1289
1290static int update_journal_header_block(struct super_block *sb,
1291 unsigned long offset,
1292 unsigned int trans_id)
1293{
1294 return _update_journal_header_block(sb, offset, trans_id);
1295}
1296
1297
1298
1299
1300
1301static int flush_older_journal_lists(struct super_block *sb,
1302 struct reiserfs_journal_list *jl)
1303{
1304 struct list_head *entry;
1305 struct reiserfs_journal_list *other_jl;
1306 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1307 unsigned int trans_id = jl->j_trans_id;
1308
1309
1310
1311
1312
1313restart:
1314 entry = journal->j_journal_list.next;
1315
1316 if (entry == &journal->j_journal_list)
1317 return 0;
1318 other_jl = JOURNAL_LIST_ENTRY(entry);
1319 if (other_jl->j_trans_id < trans_id) {
1320 BUG_ON(other_jl->j_refcount <= 0);
1321
1322 flush_journal_list(sb, other_jl, 0);
1323
1324
1325 goto restart;
1326 }
1327 return 0;
1328}
1329
1330static void del_from_work_list(struct super_block *s,
1331 struct reiserfs_journal_list *jl)
1332{
1333 struct reiserfs_journal *journal = SB_JOURNAL(s);
1334 if (!list_empty(&jl->j_working_list)) {
1335 list_del_init(&jl->j_working_list);
1336 journal->j_num_work_lists--;
1337 }
1338}
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350static int flush_journal_list(struct super_block *s,
1351 struct reiserfs_journal_list *jl, int flushall)
1352{
1353 struct reiserfs_journal_list *pjl;
1354 struct reiserfs_journal_cnode *cn, *last;
1355 int count;
1356 int was_jwait = 0;
1357 int was_dirty = 0;
1358 struct buffer_head *saved_bh;
1359 unsigned long j_len_saved = jl->j_len;
1360 struct reiserfs_journal *journal = SB_JOURNAL(s);
1361 int err = 0;
1362 int depth;
1363
1364 BUG_ON(j_len_saved <= 0);
1365
1366 if (atomic_read(&journal->j_wcount) != 0) {
1367 reiserfs_warning(s, "clm-2048", "called with wcount %d",
1368 atomic_read(&journal->j_wcount));
1369 }
1370
1371
1372 if (flushall) {
1373 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1374 } else if (mutex_trylock(&journal->j_flush_mutex)) {
1375 BUG();
1376 }
1377
1378 count = 0;
1379 if (j_len_saved > journal->j_trans_max) {
1380 reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu",
1381 j_len_saved, jl->j_trans_id);
1382 return 0;
1383 }
1384
1385
1386 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1387 atomic_read(&jl->j_commit_left) <= 0) {
1388 goto flush_older_and_return;
1389 }
1390
1391
1392
1393
1394
1395 flush_commit_list(s, jl, 1);
1396
1397 if (!(jl->j_state & LIST_DIRTY)
1398 && !reiserfs_is_journal_aborted(journal))
1399 BUG();
1400
1401
1402 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1403 atomic_read(&jl->j_commit_left) <= 0) {
1404 goto flush_older_and_return;
1405 }
1406
1407
1408
1409
1410
1411 if (atomic_read(&journal->j_wcount) != 0) {
1412 reiserfs_panic(s, "journal-844", "journal list is flushing, "
1413 "wcount is not 0");
1414 }
1415 cn = jl->j_realblock;
1416 while (cn) {
1417 was_jwait = 0;
1418 was_dirty = 0;
1419 saved_bh = NULL;
1420
1421 if (cn->blocknr == 0) {
1422 goto free_cnode;
1423 }
1424
1425
1426
1427
1428
1429 if (!(jl->j_state & LIST_DIRTY))
1430 goto free_cnode;
1431
1432 pjl = find_newer_jl_for_cn(cn);
1433
1434
1435
1436
1437
1438 if (!pjl && cn->bh) {
1439 saved_bh = cn->bh;
1440
1441
1442
1443
1444
1445 get_bh(saved_bh);
1446
1447 if (buffer_journal_dirty(saved_bh)) {
1448 BUG_ON(!can_dirty(cn));
1449 was_jwait = 1;
1450 was_dirty = 1;
1451 } else if (can_dirty(cn)) {
1452
1453
1454
1455
1456 BUG();
1457 }
1458 }
1459
1460
1461
1462
1463
1464 if (pjl) {
1465 if (atomic_read(&pjl->j_commit_left))
1466 flush_commit_list(s, pjl, 1);
1467 goto free_cnode;
1468 }
1469
1470
1471
1472
1473
1474 if (saved_bh == NULL) {
1475 goto free_cnode;
1476 }
1477
1478
1479
1480
1481
1482
1483 if ((!was_jwait) && !buffer_locked(saved_bh)) {
1484 reiserfs_warning(s, "journal-813",
1485 "BAD! buffer %llu %cdirty %cjwait, "
1486 "not in a newer transaction",
1487 (unsigned long long)saved_bh->
1488 b_blocknr, was_dirty ? ' ' : '!',
1489 was_jwait ? ' ' : '!');
1490 }
1491 if (was_dirty) {
1492
1493
1494
1495
1496 get_bh(saved_bh);
1497 set_bit(BLOCK_NEEDS_FLUSH, &cn->state);
1498 lock_buffer(saved_bh);
1499 BUG_ON(cn->blocknr != saved_bh->b_blocknr);
1500 if (buffer_dirty(saved_bh))
1501 submit_logged_buffer(saved_bh);
1502 else
1503 unlock_buffer(saved_bh);
1504 count++;
1505 } else {
1506 reiserfs_warning(s, "clm-2082",
1507 "Unable to flush buffer %llu in %s",
1508 (unsigned long long)saved_bh->
1509 b_blocknr, __func__);
1510 }
1511free_cnode:
1512 last = cn;
1513 cn = cn->next;
1514 if (saved_bh) {
1515
1516
1517
1518
1519 put_bh(saved_bh);
1520 if (atomic_read(&saved_bh->b_count) < 0) {
1521 reiserfs_warning(s, "journal-945",
1522 "saved_bh->b_count < 0");
1523 }
1524 }
1525 }
1526 if (count > 0) {
1527 cn = jl->j_realblock;
1528 while (cn) {
1529 if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) {
1530 if (!cn->bh) {
1531 reiserfs_panic(s, "journal-1011",
1532 "cn->bh is NULL");
1533 }
1534
1535 depth = reiserfs_write_unlock_nested(s);
1536 __wait_on_buffer(cn->bh);
1537 reiserfs_write_lock_nested(s, depth);
1538
1539 if (!cn->bh) {
1540 reiserfs_panic(s, "journal-1012",
1541 "cn->bh is NULL");
1542 }
1543 if (unlikely(!buffer_uptodate(cn->bh))) {
1544#ifdef CONFIG_REISERFS_CHECK
1545 reiserfs_warning(s, "journal-949",
1546 "buffer write failed");
1547#endif
1548 err = -EIO;
1549 }
1550
1551
1552
1553
1554
1555 BUG_ON(!test_clear_buffer_journal_dirty
1556 (cn->bh));
1557
1558
1559 put_bh(cn->bh);
1560
1561 release_buffer_page(cn->bh);
1562 }
1563 cn = cn->next;
1564 }
1565 }
1566
1567 if (err)
1568 reiserfs_abort(s, -EIO,
1569 "Write error while pushing transaction to disk in %s",
1570 __func__);
1571flush_older_and_return:
1572
1573
1574
1575
1576
1577
1578
1579 if (flushall) {
1580 flush_older_journal_lists(s, jl);
1581 }
1582
1583 err = journal->j_errno;
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593 if (!err && flushall) {
1594 err =
1595 update_journal_header_block(s,
1596 (jl->j_start + jl->j_len +
1597 2) % SB_ONDISK_JOURNAL_SIZE(s),
1598 jl->j_trans_id);
1599 if (err)
1600 reiserfs_abort(s, -EIO,
1601 "Write error while updating journal header in %s",
1602 __func__);
1603 }
1604 remove_all_from_journal_list(s, jl, 0);
1605 list_del_init(&jl->j_list);
1606 journal->j_num_lists--;
1607 del_from_work_list(s, jl);
1608
1609 if (journal->j_last_flush_id != 0 &&
1610 (jl->j_trans_id - journal->j_last_flush_id) != 1) {
1611 reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu",
1612 journal->j_last_flush_id, jl->j_trans_id);
1613 }
1614 journal->j_last_flush_id = jl->j_trans_id;
1615
1616
1617
1618
1619
1620 jl->j_len = 0;
1621 atomic_set(&jl->j_nonzerolen, 0);
1622 jl->j_start = 0;
1623 jl->j_realblock = NULL;
1624 jl->j_commit_bh = NULL;
1625 jl->j_trans_id = 0;
1626 jl->j_state = 0;
1627 put_journal_list(s, jl);
1628 if (flushall)
1629 mutex_unlock(&journal->j_flush_mutex);
1630 return err;
1631}
1632
1633static int write_one_transaction(struct super_block *s,
1634 struct reiserfs_journal_list *jl,
1635 struct buffer_chunk *chunk)
1636{
1637 struct reiserfs_journal_cnode *cn;
1638 int ret = 0;
1639
1640 jl->j_state |= LIST_TOUCHED;
1641 del_from_work_list(s, jl);
1642 if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) {
1643 return 0;
1644 }
1645
1646 cn = jl->j_realblock;
1647 while (cn) {
1648
1649
1650
1651
1652 if (cn->blocknr == 0) {
1653 goto next;
1654 }
1655 if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
1656 struct buffer_head *tmp_bh;
1657
1658
1659
1660
1661
1662 tmp_bh = cn->bh;
1663 get_bh(tmp_bh);
1664 lock_buffer(tmp_bh);
1665 if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) {
1666 if (!buffer_journal_dirty(tmp_bh) ||
1667 buffer_journal_prepared(tmp_bh))
1668 BUG();
1669 add_to_chunk(chunk, tmp_bh, NULL, write_chunk);
1670 ret++;
1671 } else {
1672
1673 unlock_buffer(tmp_bh);
1674 }
1675 put_bh(tmp_bh);
1676 }
1677next:
1678 cn = cn->next;
1679 cond_resched();
1680 }
1681 return ret;
1682}
1683
1684
1685static void dirty_one_transaction(struct super_block *s,
1686 struct reiserfs_journal_list *jl)
1687{
1688 struct reiserfs_journal_cnode *cn;
1689 struct reiserfs_journal_list *pjl;
1690
1691 jl->j_state |= LIST_DIRTY;
1692 cn = jl->j_realblock;
1693 while (cn) {
1694
1695
1696
1697
1698
1699 pjl = find_newer_jl_for_cn(cn);
1700 if (!pjl && cn->blocknr && cn->bh
1701 && buffer_journal_dirty(cn->bh)) {
1702 BUG_ON(!can_dirty(cn));
1703
1704
1705
1706
1707
1708 clear_buffer_journal_new(cn->bh);
1709 if (buffer_journal_prepared(cn->bh)) {
1710 set_buffer_journal_restore_dirty(cn->bh);
1711 } else {
1712 set_buffer_journal_test(cn->bh);
1713 mark_buffer_dirty(cn->bh);
1714 }
1715 }
1716 cn = cn->next;
1717 }
1718}
1719
1720static int kupdate_transactions(struct super_block *s,
1721 struct reiserfs_journal_list *jl,
1722 struct reiserfs_journal_list **next_jl,
1723 unsigned int *next_trans_id,
1724 int num_blocks, int num_trans)
1725{
1726 int ret = 0;
1727 int written = 0;
1728 int transactions_flushed = 0;
1729 unsigned int orig_trans_id = jl->j_trans_id;
1730 struct buffer_chunk chunk;
1731 struct list_head *entry;
1732 struct reiserfs_journal *journal = SB_JOURNAL(s);
1733 chunk.nr = 0;
1734
1735 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1736 if (!journal_list_still_alive(s, orig_trans_id)) {
1737 goto done;
1738 }
1739
1740
1741
1742
1743
1744 while ((num_trans && transactions_flushed < num_trans) ||
1745 (!num_trans && written < num_blocks)) {
1746
1747 if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) ||
1748 atomic_read(&jl->j_commit_left)
1749 || !(jl->j_state & LIST_DIRTY)) {
1750 del_from_work_list(s, jl);
1751 break;
1752 }
1753 ret = write_one_transaction(s, jl, &chunk);
1754
1755 if (ret < 0)
1756 goto done;
1757 transactions_flushed++;
1758 written += ret;
1759 entry = jl->j_list.next;
1760
1761
1762 if (entry == &journal->j_journal_list) {
1763 break;
1764 }
1765 jl = JOURNAL_LIST_ENTRY(entry);
1766
1767
1768 if (jl->j_trans_id <= orig_trans_id)
1769 break;
1770 }
1771 if (chunk.nr) {
1772 write_chunk(&chunk);
1773 }
1774
1775done:
1776 mutex_unlock(&journal->j_flush_mutex);
1777 return ret;
1778}
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790static int flush_used_journal_lists(struct super_block *s,
1791 struct reiserfs_journal_list *jl)
1792{
1793 unsigned long len = 0;
1794 unsigned long cur_len;
1795 int ret;
1796 int i;
1797 int limit = 256;
1798 struct reiserfs_journal_list *tjl;
1799 struct reiserfs_journal_list *flush_jl;
1800 unsigned int trans_id;
1801 struct reiserfs_journal *journal = SB_JOURNAL(s);
1802
1803 flush_jl = tjl = jl;
1804
1805
1806 if (reiserfs_data_log(s))
1807 limit = 1024;
1808
1809 for (i = 0; i < 256 && len < limit; i++) {
1810 if (atomic_read(&tjl->j_commit_left) ||
1811 tjl->j_trans_id < jl->j_trans_id) {
1812 break;
1813 }
1814 cur_len = atomic_read(&tjl->j_nonzerolen);
1815 if (cur_len > 0) {
1816 tjl->j_state &= ~LIST_TOUCHED;
1817 }
1818 len += cur_len;
1819 flush_jl = tjl;
1820 if (tjl->j_list.next == &journal->j_journal_list)
1821 break;
1822 tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next);
1823 }
1824 get_journal_list(jl);
1825 get_journal_list(flush_jl);
1826
1827
1828
1829
1830
1831
1832 if (flush_jl != jl) {
1833 ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
1834 }
1835 flush_journal_list(s, flush_jl, 1);
1836 put_journal_list(s, flush_jl);
1837 put_journal_list(s, jl);
1838 return 0;
1839}
1840
1841
1842
1843
1844
1845static void remove_journal_hash(struct super_block *sb,
1846 struct reiserfs_journal_cnode **table,
1847 struct reiserfs_journal_list *jl,
1848 unsigned long block, int remove_freed)
1849{
1850 struct reiserfs_journal_cnode *cur;
1851 struct reiserfs_journal_cnode **head;
1852
1853 head = &(journal_hash(table, sb, block));
1854 if (!head) {
1855 return;
1856 }
1857 cur = *head;
1858 while (cur) {
1859 if (cur->blocknr == block && cur->sb == sb
1860 && (jl == NULL || jl == cur->jlist)
1861 && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) {
1862 if (cur->hnext) {
1863 cur->hnext->hprev = cur->hprev;
1864 }
1865 if (cur->hprev) {
1866 cur->hprev->hnext = cur->hnext;
1867 } else {
1868 *head = cur->hnext;
1869 }
1870 cur->blocknr = 0;
1871 cur->sb = NULL;
1872 cur->state = 0;
1873
1874
1875
1876
1877 if (cur->bh && cur->jlist)
1878 atomic_dec(&cur->jlist->j_nonzerolen);
1879 cur->bh = NULL;
1880 cur->jlist = NULL;
1881 }
1882 cur = cur->hnext;
1883 }
1884}
1885
1886static void free_journal_ram(struct super_block *sb)
1887{
1888 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1889 kfree(journal->j_current_jl);
1890 journal->j_num_lists--;
1891
1892 vfree(journal->j_cnode_free_orig);
1893 free_list_bitmaps(sb, journal->j_list_bitmap);
1894 free_bitmap_nodes(sb);
1895 if (journal->j_header_bh) {
1896 brelse(journal->j_header_bh);
1897 }
1898
1899
1900
1901
1902 release_journal_dev(sb, journal);
1903 vfree(journal);
1904}
1905
1906
1907
1908
1909
1910static int do_journal_release(struct reiserfs_transaction_handle *th,
1911 struct super_block *sb, int error)
1912{
1913 struct reiserfs_transaction_handle myth;
1914 int flushed = 0;
1915 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1916
1917
1918
1919
1920
1921 if (!error && !sb_rdonly(sb)) {
1922
1923 BUG_ON(!th->t_trans_id);
1924 do_journal_end(th, FLUSH_ALL);
1925
1926
1927
1928
1929
1930 if (!journal_join(&myth, sb)) {
1931 reiserfs_prepare_for_journal(sb,
1932 SB_BUFFER_WITH_SB(sb),
1933 1);
1934 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1935 do_journal_end(&myth, FLUSH_ALL);
1936 flushed = 1;
1937 }
1938 }
1939
1940
1941 if (!error && reiserfs_is_journal_aborted(journal)) {
1942 memset(&myth, 0, sizeof(myth));
1943 if (!journal_join_abort(&myth, sb)) {
1944 reiserfs_prepare_for_journal(sb,
1945 SB_BUFFER_WITH_SB(sb),
1946 1);
1947 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1948 do_journal_end(&myth, FLUSH_ALL);
1949 }
1950 }
1951
1952
1953
1954
1955
1956
1957 reiserfs_write_unlock(sb);
1958
1959
1960
1961
1962
1963
1964 reiserfs_cancel_old_flush(sb);
1965
1966 cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work);
1967
1968 free_journal_ram(sb);
1969
1970 reiserfs_write_lock(sb);
1971
1972 return 0;
1973}
1974
1975
1976int journal_release(struct reiserfs_transaction_handle *th,
1977 struct super_block *sb)
1978{
1979 return do_journal_release(th, sb, 0);
1980}
1981
1982
1983int journal_release_error(struct reiserfs_transaction_handle *th,
1984 struct super_block *sb)
1985{
1986 return do_journal_release(th, sb, 1);
1987}
1988
1989
1990
1991
1992
1993static int journal_compare_desc_commit(struct super_block *sb,
1994 struct reiserfs_journal_desc *desc,
1995 struct reiserfs_journal_commit *commit)
1996{
1997 if (get_commit_trans_id(commit) != get_desc_trans_id(desc) ||
1998 get_commit_trans_len(commit) != get_desc_trans_len(desc) ||
1999 get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max ||
2000 get_commit_trans_len(commit) <= 0) {
2001 return 1;
2002 }
2003 return 0;
2004}
2005
2006
2007
2008
2009
2010
2011
2012static int journal_transaction_is_valid(struct super_block *sb,
2013 struct buffer_head *d_bh,
2014 unsigned int *oldest_invalid_trans_id,
2015 unsigned long *newest_mount_id)
2016{
2017 struct reiserfs_journal_desc *desc;
2018 struct reiserfs_journal_commit *commit;
2019 struct buffer_head *c_bh;
2020 unsigned long offset;
2021
2022 if (!d_bh)
2023 return 0;
2024
2025 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2026 if (get_desc_trans_len(desc) > 0
2027 && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) {
2028 if (oldest_invalid_trans_id && *oldest_invalid_trans_id
2029 && get_desc_trans_id(desc) > *oldest_invalid_trans_id) {
2030 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2031 "journal-986: transaction "
2032 "is valid returning because trans_id %d is greater than "
2033 "oldest_invalid %lu",
2034 get_desc_trans_id(desc),
2035 *oldest_invalid_trans_id);
2036 return 0;
2037 }
2038 if (newest_mount_id
2039 && *newest_mount_id > get_desc_mount_id(desc)) {
2040 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2041 "journal-1087: transaction "
2042 "is valid returning because mount_id %d is less than "
2043 "newest_mount_id %lu",
2044 get_desc_mount_id(desc),
2045 *newest_mount_id);
2046 return -1;
2047 }
2048 if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) {
2049 reiserfs_warning(sb, "journal-2018",
2050 "Bad transaction length %d "
2051 "encountered, ignoring transaction",
2052 get_desc_trans_len(desc));
2053 return -1;
2054 }
2055 offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2056
2057
2058
2059
2060
2061 c_bh =
2062 journal_bread(sb,
2063 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2064 ((offset + get_desc_trans_len(desc) +
2065 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
2066 if (!c_bh)
2067 return 0;
2068 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2069 if (journal_compare_desc_commit(sb, desc, commit)) {
2070 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2071 "journal_transaction_is_valid, commit offset %ld had bad "
2072 "time %d or length %d",
2073 c_bh->b_blocknr -
2074 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2075 get_commit_trans_id(commit),
2076 get_commit_trans_len(commit));
2077 brelse(c_bh);
2078 if (oldest_invalid_trans_id) {
2079 *oldest_invalid_trans_id =
2080 get_desc_trans_id(desc);
2081 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2082 "journal-1004: "
2083 "transaction_is_valid setting oldest invalid trans_id "
2084 "to %d",
2085 get_desc_trans_id(desc));
2086 }
2087 return -1;
2088 }
2089 brelse(c_bh);
2090 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2091 "journal-1006: found valid "
2092 "transaction start offset %llu, len %d id %d",
2093 d_bh->b_blocknr -
2094 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2095 get_desc_trans_len(desc),
2096 get_desc_trans_id(desc));
2097 return 1;
2098 } else {
2099 return 0;
2100 }
2101}
2102
2103static void brelse_array(struct buffer_head **heads, int num)
2104{
2105 int i;
2106 for (i = 0; i < num; i++) {
2107 brelse(heads[i]);
2108 }
2109}
2110
2111
2112
2113
2114
2115
2116
2117static int journal_read_transaction(struct super_block *sb,
2118 unsigned long cur_dblock,
2119 unsigned long oldest_start,
2120 unsigned int oldest_trans_id,
2121 unsigned long newest_mount_id)
2122{
2123 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2124 struct reiserfs_journal_desc *desc;
2125 struct reiserfs_journal_commit *commit;
2126 unsigned int trans_id = 0;
2127 struct buffer_head *c_bh;
2128 struct buffer_head *d_bh;
2129 struct buffer_head **log_blocks = NULL;
2130 struct buffer_head **real_blocks = NULL;
2131 unsigned int trans_offset;
2132 int i;
2133 int trans_half;
2134
2135 d_bh = journal_bread(sb, cur_dblock);
2136 if (!d_bh)
2137 return 1;
2138 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2139 trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2140 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: "
2141 "journal_read_transaction, offset %llu, len %d mount_id %d",
2142 d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2143 get_desc_trans_len(desc), get_desc_mount_id(desc));
2144 if (get_desc_trans_id(desc) < oldest_trans_id) {
2145 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: "
2146 "journal_read_trans skipping because %lu is too old",
2147 cur_dblock -
2148 SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2149 brelse(d_bh);
2150 return 1;
2151 }
2152 if (get_desc_mount_id(desc) != newest_mount_id) {
2153 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: "
2154 "journal_read_trans skipping because %d is != "
2155 "newest_mount_id %lu", get_desc_mount_id(desc),
2156 newest_mount_id);
2157 brelse(d_bh);
2158 return 1;
2159 }
2160 c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2161 ((trans_offset + get_desc_trans_len(desc) + 1) %
2162 SB_ONDISK_JOURNAL_SIZE(sb)));
2163 if (!c_bh) {
2164 brelse(d_bh);
2165 return 1;
2166 }
2167 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2168 if (journal_compare_desc_commit(sb, desc, commit)) {
2169 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2170 "journal_read_transaction, "
2171 "commit offset %llu had bad time %d or length %d",
2172 c_bh->b_blocknr -
2173 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2174 get_commit_trans_id(commit),
2175 get_commit_trans_len(commit));
2176 brelse(c_bh);
2177 brelse(d_bh);
2178 return 1;
2179 }
2180
2181 if (bdev_read_only(sb->s_bdev)) {
2182 reiserfs_warning(sb, "clm-2076",
2183 "device is readonly, unable to replay log");
2184 brelse(c_bh);
2185 brelse(d_bh);
2186 return -EROFS;
2187 }
2188
2189 trans_id = get_desc_trans_id(desc);
2190
2191
2192
2193
2194 log_blocks = kmalloc_array(get_desc_trans_len(desc),
2195 sizeof(struct buffer_head *),
2196 GFP_NOFS);
2197 real_blocks = kmalloc_array(get_desc_trans_len(desc),
2198 sizeof(struct buffer_head *),
2199 GFP_NOFS);
2200 if (!log_blocks || !real_blocks) {
2201 brelse(c_bh);
2202 brelse(d_bh);
2203 kfree(log_blocks);
2204 kfree(real_blocks);
2205 reiserfs_warning(sb, "journal-1169",
2206 "kmalloc failed, unable to mount FS");
2207 return -1;
2208 }
2209
2210 trans_half = journal_trans_half(sb->s_blocksize);
2211 for (i = 0; i < get_desc_trans_len(desc); i++) {
2212 log_blocks[i] =
2213 journal_getblk(sb,
2214 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2215 (trans_offset + 1 +
2216 i) % SB_ONDISK_JOURNAL_SIZE(sb));
2217 if (i < trans_half) {
2218 real_blocks[i] =
2219 sb_getblk(sb,
2220 le32_to_cpu(desc->j_realblock[i]));
2221 } else {
2222 real_blocks[i] =
2223 sb_getblk(sb,
2224 le32_to_cpu(commit->
2225 j_realblock[i - trans_half]));
2226 }
2227 if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) {
2228 reiserfs_warning(sb, "journal-1207",
2229 "REPLAY FAILURE fsck required! "
2230 "Block to replay is outside of "
2231 "filesystem");
2232 goto abort_replay;
2233 }
2234
2235 if (is_block_in_log_or_reserved_area
2236 (sb, real_blocks[i]->b_blocknr)) {
2237 reiserfs_warning(sb, "journal-1204",
2238 "REPLAY FAILURE fsck required! "
2239 "Trying to replay onto a log block");
2240abort_replay:
2241 brelse_array(log_blocks, i);
2242 brelse_array(real_blocks, i);
2243 brelse(c_bh);
2244 brelse(d_bh);
2245 kfree(log_blocks);
2246 kfree(real_blocks);
2247 return -1;
2248 }
2249 }
2250
2251 ll_rw_block(REQ_OP_READ, 0, get_desc_trans_len(desc), log_blocks);
2252 for (i = 0; i < get_desc_trans_len(desc); i++) {
2253
2254 wait_on_buffer(log_blocks[i]);
2255 if (!buffer_uptodate(log_blocks[i])) {
2256 reiserfs_warning(sb, "journal-1212",
2257 "REPLAY FAILURE fsck required! "
2258 "buffer write failed");
2259 brelse_array(log_blocks + i,
2260 get_desc_trans_len(desc) - i);
2261 brelse_array(real_blocks, get_desc_trans_len(desc));
2262 brelse(c_bh);
2263 brelse(d_bh);
2264 kfree(log_blocks);
2265 kfree(real_blocks);
2266 return -1;
2267 }
2268 memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data,
2269 real_blocks[i]->b_size);
2270 set_buffer_uptodate(real_blocks[i]);
2271 brelse(log_blocks[i]);
2272 }
2273
2274 for (i = 0; i < get_desc_trans_len(desc); i++) {
2275 set_buffer_dirty(real_blocks[i]);
2276 write_dirty_buffer(real_blocks[i], 0);
2277 }
2278 for (i = 0; i < get_desc_trans_len(desc); i++) {
2279 wait_on_buffer(real_blocks[i]);
2280 if (!buffer_uptodate(real_blocks[i])) {
2281 reiserfs_warning(sb, "journal-1226",
2282 "REPLAY FAILURE, fsck required! "
2283 "buffer write failed");
2284 brelse_array(real_blocks + i,
2285 get_desc_trans_len(desc) - i);
2286 brelse(c_bh);
2287 brelse(d_bh);
2288 kfree(log_blocks);
2289 kfree(real_blocks);
2290 return -1;
2291 }
2292 brelse(real_blocks[i]);
2293 }
2294 cur_dblock =
2295 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2296 ((trans_offset + get_desc_trans_len(desc) +
2297 2) % SB_ONDISK_JOURNAL_SIZE(sb));
2298 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2299 "journal-1095: setting journal " "start to offset %ld",
2300 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2301
2302
2303
2304
2305
2306 journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2307 journal->j_last_flush_trans_id = trans_id;
2308 journal->j_trans_id = trans_id + 1;
2309
2310 if (journal->j_trans_id == 0)
2311 journal->j_trans_id = 10;
2312 brelse(c_bh);
2313 brelse(d_bh);
2314 kfree(log_blocks);
2315 kfree(real_blocks);
2316 return 0;
2317}
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327static struct buffer_head *reiserfs_breada(struct block_device *dev,
2328 b_blocknr_t block, int bufsize,
2329 b_blocknr_t max_block)
2330{
2331 struct buffer_head *bhlist[BUFNR];
2332 unsigned int blocks = BUFNR;
2333 struct buffer_head *bh;
2334 int i, j;
2335
2336 bh = __getblk(dev, block, bufsize);
2337 if (buffer_uptodate(bh))
2338 return (bh);
2339
2340 if (block + BUFNR > max_block) {
2341 blocks = max_block - block;
2342 }
2343 bhlist[0] = bh;
2344 j = 1;
2345 for (i = 1; i < blocks; i++) {
2346 bh = __getblk(dev, block + i, bufsize);
2347 if (buffer_uptodate(bh)) {
2348 brelse(bh);
2349 break;
2350 } else
2351 bhlist[j++] = bh;
2352 }
2353 ll_rw_block(REQ_OP_READ, 0, j, bhlist);
2354 for (i = 1; i < j; i++)
2355 brelse(bhlist[i]);
2356 bh = bhlist[0];
2357 wait_on_buffer(bh);
2358 if (buffer_uptodate(bh))
2359 return bh;
2360 brelse(bh);
2361 return NULL;
2362}
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376static int journal_read(struct super_block *sb)
2377{
2378 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2379 struct reiserfs_journal_desc *desc;
2380 unsigned int oldest_trans_id = 0;
2381 unsigned int oldest_invalid_trans_id = 0;
2382 time64_t start;
2383 unsigned long oldest_start = 0;
2384 unsigned long cur_dblock = 0;
2385 unsigned long newest_mount_id = 9;
2386 struct buffer_head *d_bh;
2387 struct reiserfs_journal_header *jh;
2388 int valid_journal_header = 0;
2389 int replay_count = 0;
2390 int continue_replay = 1;
2391 int ret;
2392
2393 cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2394 reiserfs_info(sb, "checking transaction log (%pg)\n",
2395 journal->j_dev_bd);
2396 start = ktime_get_seconds();
2397
2398
2399
2400
2401
2402
2403 journal->j_header_bh = journal_bread(sb,
2404 SB_ONDISK_JOURNAL_1st_BLOCK(sb)
2405 + SB_ONDISK_JOURNAL_SIZE(sb));
2406 if (!journal->j_header_bh) {
2407 return 1;
2408 }
2409 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data);
2410 if (le32_to_cpu(jh->j_first_unflushed_offset) <
2411 SB_ONDISK_JOURNAL_SIZE(sb)
2412 && le32_to_cpu(jh->j_last_flush_trans_id) > 0) {
2413 oldest_start =
2414 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2415 le32_to_cpu(jh->j_first_unflushed_offset);
2416 oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2417 newest_mount_id = le32_to_cpu(jh->j_mount_id);
2418 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2419 "journal-1153: found in "
2420 "header: first_unflushed_offset %d, last_flushed_trans_id "
2421 "%lu", le32_to_cpu(jh->j_first_unflushed_offset),
2422 le32_to_cpu(jh->j_last_flush_trans_id));
2423 valid_journal_header = 1;
2424
2425
2426
2427
2428
2429
2430 d_bh =
2431 journal_bread(sb,
2432 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2433 le32_to_cpu(jh->j_first_unflushed_offset));
2434 ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL);
2435 if (!ret) {
2436 continue_replay = 0;
2437 }
2438 brelse(d_bh);
2439 goto start_log_replay;
2440 }
2441
2442
2443
2444
2445
2446
2447 while (continue_replay
2448 && cur_dblock <
2449 (SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2450 SB_ONDISK_JOURNAL_SIZE(sb))) {
2451
2452
2453
2454
2455 d_bh =
2456 reiserfs_breada(journal->j_dev_bd, cur_dblock,
2457 sb->s_blocksize,
2458 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2459 SB_ONDISK_JOURNAL_SIZE(sb));
2460 ret =
2461 journal_transaction_is_valid(sb, d_bh,
2462 &oldest_invalid_trans_id,
2463 &newest_mount_id);
2464 if (ret == 1) {
2465 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2466 if (oldest_start == 0) {
2467 oldest_trans_id = get_desc_trans_id(desc);
2468 oldest_start = d_bh->b_blocknr;
2469 newest_mount_id = get_desc_mount_id(desc);
2470 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2471 "journal-1179: Setting "
2472 "oldest_start to offset %llu, trans_id %lu",
2473 oldest_start -
2474 SB_ONDISK_JOURNAL_1st_BLOCK
2475 (sb), oldest_trans_id);
2476 } else if (oldest_trans_id > get_desc_trans_id(desc)) {
2477
2478 oldest_trans_id = get_desc_trans_id(desc);
2479 oldest_start = d_bh->b_blocknr;
2480 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2481 "journal-1180: Resetting "
2482 "oldest_start to offset %lu, trans_id %lu",
2483 oldest_start -
2484 SB_ONDISK_JOURNAL_1st_BLOCK
2485 (sb), oldest_trans_id);
2486 }
2487 if (newest_mount_id < get_desc_mount_id(desc)) {
2488 newest_mount_id = get_desc_mount_id(desc);
2489 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2490 "journal-1299: Setting "
2491 "newest_mount_id to %d",
2492 get_desc_mount_id(desc));
2493 }
2494 cur_dblock += get_desc_trans_len(desc) + 2;
2495 } else {
2496 cur_dblock++;
2497 }
2498 brelse(d_bh);
2499 }
2500
2501start_log_replay:
2502 cur_dblock = oldest_start;
2503 if (oldest_trans_id) {
2504 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2505 "journal-1206: Starting replay "
2506 "from offset %llu, trans_id %lu",
2507 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2508 oldest_trans_id);
2509
2510 }
2511 replay_count = 0;
2512 while (continue_replay && oldest_trans_id > 0) {
2513 ret =
2514 journal_read_transaction(sb, cur_dblock, oldest_start,
2515 oldest_trans_id, newest_mount_id);
2516 if (ret < 0) {
2517 return ret;
2518 } else if (ret != 0) {
2519 break;
2520 }
2521 cur_dblock =
2522 SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start;
2523 replay_count++;
2524 if (cur_dblock == oldest_start)
2525 break;
2526 }
2527
2528 if (oldest_trans_id == 0) {
2529 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2530 "journal-1225: No valid " "transactions found");
2531 }
2532
2533
2534
2535
2536
2537
2538 if (valid_journal_header && replay_count == 0) {
2539 journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset);
2540 journal->j_trans_id =
2541 le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2542
2543 if (journal->j_trans_id == 0)
2544 journal->j_trans_id = 10;
2545 journal->j_last_flush_trans_id =
2546 le32_to_cpu(jh->j_last_flush_trans_id);
2547 journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1;
2548 } else {
2549 journal->j_mount_id = newest_mount_id + 1;
2550 }
2551 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
2552 "newest_mount_id to %lu", journal->j_mount_id);
2553 journal->j_first_unflushed_offset = journal->j_start;
2554 if (replay_count > 0) {
2555 reiserfs_info(sb,
2556 "replayed %d transactions in %lu seconds\n",
2557 replay_count, ktime_get_seconds() - start);
2558 }
2559
2560 reiserfs_write_lock(sb);
2561 if (!bdev_read_only(sb->s_bdev) &&
2562 _update_journal_header_block(sb, journal->j_start,
2563 journal->j_last_flush_trans_id)) {
2564 reiserfs_write_unlock(sb);
2565
2566
2567
2568
2569 return -1;
2570 }
2571 reiserfs_write_unlock(sb);
2572 return 0;
2573}
2574
2575static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
2576{
2577 struct reiserfs_journal_list *jl;
2578 jl = kzalloc(sizeof(struct reiserfs_journal_list),
2579 GFP_NOFS | __GFP_NOFAIL);
2580 INIT_LIST_HEAD(&jl->j_list);
2581 INIT_LIST_HEAD(&jl->j_working_list);
2582 INIT_LIST_HEAD(&jl->j_tail_bh_list);
2583 INIT_LIST_HEAD(&jl->j_bh_list);
2584 mutex_init(&jl->j_commit_mutex);
2585 SB_JOURNAL(s)->j_num_lists++;
2586 get_journal_list(jl);
2587 return jl;
2588}
2589
2590static void journal_list_init(struct super_block *sb)
2591{
2592 SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb);
2593}
2594
2595static void release_journal_dev(struct super_block *super,
2596 struct reiserfs_journal *journal)
2597{
2598 if (journal->j_dev_bd != NULL) {
2599 blkdev_put(journal->j_dev_bd, journal->j_dev_mode);
2600 journal->j_dev_bd = NULL;
2601 }
2602}
2603
2604static int journal_init_dev(struct super_block *super,
2605 struct reiserfs_journal *journal,
2606 const char *jdev_name)
2607{
2608 int result;
2609 dev_t jdev;
2610 fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
2611 char b[BDEVNAME_SIZE];
2612
2613 result = 0;
2614
2615 journal->j_dev_bd = NULL;
2616 jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
2617 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
2618
2619 if (bdev_read_only(super->s_bdev))
2620 blkdev_mode = FMODE_READ;
2621
2622
2623 if ((!jdev_name || !jdev_name[0])) {
2624 if (jdev == super->s_dev)
2625 blkdev_mode &= ~FMODE_EXCL;
2626 journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode,
2627 journal);
2628 journal->j_dev_mode = blkdev_mode;
2629 if (IS_ERR(journal->j_dev_bd)) {
2630 result = PTR_ERR(journal->j_dev_bd);
2631 journal->j_dev_bd = NULL;
2632 reiserfs_warning(super, "sh-458",
2633 "cannot init journal device '%s': %i",
2634 __bdevname(jdev, b), result);
2635 return result;
2636 } else if (jdev != super->s_dev)
2637 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2638
2639 return 0;
2640 }
2641
2642 journal->j_dev_mode = blkdev_mode;
2643 journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal);
2644 if (IS_ERR(journal->j_dev_bd)) {
2645 result = PTR_ERR(journal->j_dev_bd);
2646 journal->j_dev_bd = NULL;
2647 reiserfs_warning(super, "sh-457",
2648 "journal_init_dev: Cannot open '%s': %i",
2649 jdev_name, result);
2650 return result;
2651 }
2652
2653 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2654 reiserfs_info(super,
2655 "journal_init_dev: journal device: %pg\n",
2656 journal->j_dev_bd);
2657 return 0;
2658}
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672#define REISERFS_STANDARD_BLKSIZE (4096)
2673
2674static int check_advise_trans_params(struct super_block *sb,
2675 struct reiserfs_journal *journal)
2676{
2677 if (journal->j_trans_max) {
2678
2679 int ratio = 1;
2680 if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE)
2681 ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize;
2682
2683 if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio ||
2684 journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio ||
2685 SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max <
2686 JOURNAL_MIN_RATIO) {
2687 reiserfs_warning(sb, "sh-462",
2688 "bad transaction max size (%u). "
2689 "FSCK?", journal->j_trans_max);
2690 return 1;
2691 }
2692 if (journal->j_max_batch != (journal->j_trans_max) *
2693 JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) {
2694 reiserfs_warning(sb, "sh-463",
2695 "bad transaction max batch (%u). "
2696 "FSCK?", journal->j_max_batch);
2697 return 1;
2698 }
2699 } else {
2700
2701
2702
2703
2704
2705
2706 if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) {
2707 reiserfs_warning(sb, "sh-464", "bad blocksize (%u)",
2708 sb->s_blocksize);
2709 return 1;
2710 }
2711 journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT;
2712 journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT;
2713 journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE;
2714 }
2715 return 0;
2716}
2717
2718
2719int journal_init(struct super_block *sb, const char *j_dev_name,
2720 int old_format, unsigned int commit_max_age)
2721{
2722 int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2;
2723 struct buffer_head *bhjh;
2724 struct reiserfs_super_block *rs;
2725 struct reiserfs_journal_header *jh;
2726 struct reiserfs_journal *journal;
2727 struct reiserfs_journal_list *jl;
2728 int ret;
2729
2730 journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal));
2731 if (!journal) {
2732 reiserfs_warning(sb, "journal-1256",
2733 "unable to get memory for journal structure");
2734 return 1;
2735 }
2736 INIT_LIST_HEAD(&journal->j_bitmap_nodes);
2737 INIT_LIST_HEAD(&journal->j_prealloc_list);
2738 INIT_LIST_HEAD(&journal->j_working_list);
2739 INIT_LIST_HEAD(&journal->j_journal_list);
2740 journal->j_persistent_trans = 0;
2741 if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap,
2742 reiserfs_bmap_count(sb)))
2743 goto free_and_return;
2744
2745 allocate_bitmap_nodes(sb);
2746
2747
2748 SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ?
2749 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2750 / sb->s_blocksize +
2751 reiserfs_bmap_count(sb) +
2752 1 :
2753 REISERFS_DISK_OFFSET_IN_BYTES /
2754 sb->s_blocksize + 2);
2755
2756
2757
2758
2759
2760 if (!SB_ONDISK_JOURNAL_DEVICE(sb) &&
2761 (SB_JOURNAL_1st_RESERVED_BLOCK(sb) +
2762 SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) {
2763 reiserfs_warning(sb, "journal-1393",
2764 "journal does not fit for area addressed "
2765 "by first of bitmap blocks. It starts at "
2766 "%u and its size is %u. Block size %ld",
2767 SB_JOURNAL_1st_RESERVED_BLOCK(sb),
2768 SB_ONDISK_JOURNAL_SIZE(sb),
2769 sb->s_blocksize);
2770 goto free_and_return;
2771 }
2772
2773 if (journal_init_dev(sb, journal, j_dev_name) != 0) {
2774 reiserfs_warning(sb, "sh-462",
2775 "unable to initialize journal device");
2776 goto free_and_return;
2777 }
2778
2779 rs = SB_DISK_SUPER_BLOCK(sb);
2780
2781
2782 bhjh = journal_bread(sb,
2783 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2784 SB_ONDISK_JOURNAL_SIZE(sb));
2785 if (!bhjh) {
2786 reiserfs_warning(sb, "sh-459",
2787 "unable to read journal header");
2788 goto free_and_return;
2789 }
2790 jh = (struct reiserfs_journal_header *)(bhjh->b_data);
2791
2792
2793 if (is_reiserfs_jr(rs)
2794 && (le32_to_cpu(jh->jh_journal.jp_journal_magic) !=
2795 sb_jp_journal_magic(rs))) {
2796 reiserfs_warning(sb, "sh-460",
2797 "journal header magic %x (device %pg) does "
2798 "not match to magic found in super block %x",
2799 jh->jh_journal.jp_journal_magic,
2800 journal->j_dev_bd,
2801 sb_jp_journal_magic(rs));
2802 brelse(bhjh);
2803 goto free_and_return;
2804 }
2805
2806 journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max);
2807 journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch);
2808 journal->j_max_commit_age =
2809 le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age);
2810 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
2811
2812 if (check_advise_trans_params(sb, journal) != 0)
2813 goto free_and_return;
2814 journal->j_default_max_commit_age = journal->j_max_commit_age;
2815
2816 if (commit_max_age != 0) {
2817 journal->j_max_commit_age = commit_max_age;
2818 journal->j_max_trans_age = commit_max_age;
2819 }
2820
2821 reiserfs_info(sb, "journal params: device %pg, size %u, "
2822 "journal first block %u, max trans len %u, max batch %u, "
2823 "max commit age %u, max trans age %u\n",
2824 journal->j_dev_bd,
2825 SB_ONDISK_JOURNAL_SIZE(sb),
2826 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2827 journal->j_trans_max,
2828 journal->j_max_batch,
2829 journal->j_max_commit_age, journal->j_max_trans_age);
2830
2831 brelse(bhjh);
2832
2833 journal->j_list_bitmap_index = 0;
2834 journal_list_init(sb);
2835
2836 memset(journal->j_list_hash_table, 0,
2837 JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
2838
2839 INIT_LIST_HEAD(&journal->j_dirty_buffers);
2840 spin_lock_init(&journal->j_dirty_buffers_lock);
2841
2842 journal->j_start = 0;
2843 journal->j_len = 0;
2844 journal->j_len_alloc = 0;
2845 atomic_set(&journal->j_wcount, 0);
2846 atomic_set(&journal->j_async_throttle, 0);
2847 journal->j_bcount = 0;
2848 journal->j_trans_start_time = 0;
2849 journal->j_last = NULL;
2850 journal->j_first = NULL;
2851 init_waitqueue_head(&journal->j_join_wait);
2852 mutex_init(&journal->j_mutex);
2853 mutex_init(&journal->j_flush_mutex);
2854
2855 journal->j_trans_id = 10;
2856 journal->j_mount_id = 10;
2857 journal->j_state = 0;
2858 atomic_set(&journal->j_jlock, 0);
2859 journal->j_cnode_free_list = allocate_cnodes(num_cnodes);
2860 journal->j_cnode_free_orig = journal->j_cnode_free_list;
2861 journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0;
2862 journal->j_cnode_used = 0;
2863 journal->j_must_wait = 0;
2864
2865 if (journal->j_cnode_free == 0) {
2866 reiserfs_warning(sb, "journal-2004", "Journal cnode memory "
2867 "allocation failed (%ld bytes). Journal is "
2868 "too large for available memory. Usually "
2869 "this is due to a journal that is too large.",
2870 sizeof (struct reiserfs_journal_cnode) * num_cnodes);
2871 goto free_and_return;
2872 }
2873
2874 init_journal_hash(sb);
2875 jl = journal->j_current_jl;
2876
2877
2878
2879
2880
2881
2882 reiserfs_write_lock(sb);
2883 jl->j_list_bitmap = get_list_bitmap(sb, jl);
2884 reiserfs_write_unlock(sb);
2885 if (!jl->j_list_bitmap) {
2886 reiserfs_warning(sb, "journal-2005",
2887 "get_list_bitmap failed for journal list 0");
2888 goto free_and_return;
2889 }
2890
2891 ret = journal_read(sb);
2892 if (ret < 0) {
2893 reiserfs_warning(sb, "reiserfs-2006",
2894 "Replay Failure, unable to mount");
2895 goto free_and_return;
2896 }
2897
2898 INIT_DELAYED_WORK(&journal->j_work, flush_async_commits);
2899 journal->j_work_sb = sb;
2900 return 0;
2901free_and_return:
2902 free_journal_ram(sb);
2903 return 1;
2904}
2905
2906
2907
2908
2909
2910
2911int journal_transaction_should_end(struct reiserfs_transaction_handle *th,
2912 int new_alloc)
2913{
2914 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2915 time64_t now = ktime_get_seconds();
2916
2917 BUG_ON(!th->t_trans_id);
2918 if (th->t_refcount > 1)
2919 return 0;
2920 if (journal->j_must_wait > 0 ||
2921 (journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
2922 atomic_read(&journal->j_jlock) ||
2923 (now - journal->j_trans_start_time) > journal->j_max_trans_age ||
2924 journal->j_cnode_free < (journal->j_trans_max * 3)) {
2925 return 1;
2926 }
2927
2928 journal->j_len_alloc += new_alloc;
2929 th->t_blocks_allocated += new_alloc ;
2930 return 0;
2931}
2932
2933
2934void reiserfs_block_writes(struct reiserfs_transaction_handle *th)
2935{
2936 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2937 BUG_ON(!th->t_trans_id);
2938 journal->j_must_wait = 1;
2939 set_bit(J_WRITERS_BLOCKED, &journal->j_state);
2940 return;
2941}
2942
2943
2944void reiserfs_allow_writes(struct super_block *s)
2945{
2946 struct reiserfs_journal *journal = SB_JOURNAL(s);
2947 clear_bit(J_WRITERS_BLOCKED, &journal->j_state);
2948 wake_up(&journal->j_join_wait);
2949}
2950
2951
2952void reiserfs_wait_on_write_block(struct super_block *s)
2953{
2954 struct reiserfs_journal *journal = SB_JOURNAL(s);
2955 wait_event(journal->j_join_wait,
2956 !test_bit(J_WRITERS_BLOCKED, &journal->j_state));
2957}
2958
2959static void queue_log_writer(struct super_block *s)
2960{
2961 wait_queue_entry_t wait;
2962 struct reiserfs_journal *journal = SB_JOURNAL(s);
2963 set_bit(J_WRITERS_QUEUED, &journal->j_state);
2964
2965
2966
2967
2968
2969 init_waitqueue_entry(&wait, current);
2970 add_wait_queue(&journal->j_join_wait, &wait);
2971 set_current_state(TASK_UNINTERRUPTIBLE);
2972 if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) {
2973 int depth = reiserfs_write_unlock_nested(s);
2974 schedule();
2975 reiserfs_write_lock_nested(s, depth);
2976 }
2977 __set_current_state(TASK_RUNNING);
2978 remove_wait_queue(&journal->j_join_wait, &wait);
2979}
2980
2981static void wake_queued_writers(struct super_block *s)
2982{
2983 struct reiserfs_journal *journal = SB_JOURNAL(s);
2984 if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state))
2985 wake_up(&journal->j_join_wait);
2986}
2987
2988static void let_transaction_grow(struct super_block *sb, unsigned int trans_id)
2989{
2990 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2991 unsigned long bcount = journal->j_bcount;
2992 while (1) {
2993 int depth;
2994
2995 depth = reiserfs_write_unlock_nested(sb);
2996 schedule_timeout_uninterruptible(1);
2997 reiserfs_write_lock_nested(sb, depth);
2998
2999 journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
3000 while ((atomic_read(&journal->j_wcount) > 0 ||
3001 atomic_read(&journal->j_jlock)) &&
3002 journal->j_trans_id == trans_id) {
3003 queue_log_writer(sb);
3004 }
3005 if (journal->j_trans_id != trans_id)
3006 break;
3007 if (bcount == journal->j_bcount)
3008 break;
3009 bcount = journal->j_bcount;
3010 }
3011}
3012
3013
3014
3015
3016
3017
3018
3019
3020static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
3021 struct super_block *sb, unsigned long nblocks,
3022 int join)
3023{
3024 time64_t now = ktime_get_seconds();
3025 unsigned int old_trans_id;
3026 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3027 struct reiserfs_transaction_handle myth;
3028 int sched_count = 0;
3029 int retval;
3030 int depth;
3031
3032 reiserfs_check_lock_depth(sb, "journal_begin");
3033 BUG_ON(nblocks > journal->j_trans_max);
3034
3035 PROC_INFO_INC(sb, journal.journal_being);
3036
3037 th->t_refcount = 1;
3038 th->t_super = sb;
3039
3040relock:
3041 lock_journal(sb);
3042 if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) {
3043 unlock_journal(sb);
3044 retval = journal->j_errno;
3045 goto out_fail;
3046 }
3047 journal->j_bcount++;
3048
3049 if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
3050 unlock_journal(sb);
3051 depth = reiserfs_write_unlock_nested(sb);
3052 reiserfs_wait_on_write_block(sb);
3053 reiserfs_write_lock_nested(sb, depth);
3054 PROC_INFO_INC(sb, journal.journal_relock_writers);
3055 goto relock;
3056 }
3057 now = ktime_get_seconds();
3058
3059
3060
3061
3062
3063
3064
3065
3066 if ((!join && journal->j_must_wait > 0) ||
3067 (!join
3068 && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch)
3069 || (!join && atomic_read(&journal->j_wcount) > 0
3070 && journal->j_trans_start_time > 0
3071 && (now - journal->j_trans_start_time) >
3072 journal->j_max_trans_age) || (!join
3073 && atomic_read(&journal->j_jlock))
3074 || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
3075
3076 old_trans_id = journal->j_trans_id;
3077
3078 unlock_journal(sb);
3079
3080 if (!join && (journal->j_len_alloc + nblocks + 2) >=
3081 journal->j_max_batch &&
3082 ((journal->j_len + nblocks + 2) * 100) <
3083 (journal->j_len_alloc * 75)) {
3084 if (atomic_read(&journal->j_wcount) > 10) {
3085 sched_count++;
3086 queue_log_writer(sb);
3087 goto relock;
3088 }
3089 }
3090
3091
3092
3093
3094 if (atomic_read(&journal->j_jlock)) {
3095 while (journal->j_trans_id == old_trans_id &&
3096 atomic_read(&journal->j_jlock)) {
3097 queue_log_writer(sb);
3098 }
3099 goto relock;
3100 }
3101 retval = journal_join(&myth, sb);
3102 if (retval)
3103 goto out_fail;
3104
3105
3106 if (old_trans_id != journal->j_trans_id) {
3107 retval = do_journal_end(&myth, 0);
3108 } else {
3109 retval = do_journal_end(&myth, COMMIT_NOW);
3110 }
3111
3112 if (retval)
3113 goto out_fail;
3114
3115 PROC_INFO_INC(sb, journal.journal_relock_wcount);
3116 goto relock;
3117 }
3118
3119 if (journal->j_trans_start_time == 0) {
3120 journal->j_trans_start_time = ktime_get_seconds();
3121 }
3122 atomic_inc(&journal->j_wcount);
3123 journal->j_len_alloc += nblocks;
3124 th->t_blocks_logged = 0;
3125 th->t_blocks_allocated = nblocks;
3126 th->t_trans_id = journal->j_trans_id;
3127 unlock_journal(sb);
3128 INIT_LIST_HEAD(&th->t_list);
3129 return 0;
3130
3131out_fail:
3132 memset(th, 0, sizeof(*th));
3133
3134
3135
3136
3137
3138 th->t_super = sb;
3139 return retval;
3140}
3141
3142struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
3143 super_block
3144 *s,
3145 int nblocks)
3146{
3147 int ret;
3148 struct reiserfs_transaction_handle *th;
3149
3150
3151
3152
3153
3154 if (reiserfs_transaction_running(s)) {
3155 th = current->journal_info;
3156 th->t_refcount++;
3157 BUG_ON(th->t_refcount < 2);
3158
3159 return th;
3160 }
3161 th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS);
3162 if (!th)
3163 return NULL;
3164 ret = journal_begin(th, s, nblocks);
3165 if (ret) {
3166 kfree(th);
3167 return NULL;
3168 }
3169
3170 SB_JOURNAL(s)->j_persistent_trans++;
3171 return th;
3172}
3173
3174int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th)
3175{
3176 struct super_block *s = th->t_super;
3177 int ret = 0;
3178 if (th->t_trans_id)
3179 ret = journal_end(th);
3180 else
3181 ret = -EIO;
3182 if (th->t_refcount == 0) {
3183 SB_JOURNAL(s)->j_persistent_trans--;
3184 kfree(th);
3185 }
3186 return ret;
3187}
3188
3189static int journal_join(struct reiserfs_transaction_handle *th,
3190 struct super_block *sb)
3191{
3192 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3193
3194
3195
3196
3197
3198 th->t_handle_save = cur_th;
3199 BUG_ON(cur_th && cur_th->t_refcount > 1);
3200 return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN);
3201}
3202
3203int journal_join_abort(struct reiserfs_transaction_handle *th,
3204 struct super_block *sb)
3205{
3206 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3207
3208
3209
3210
3211
3212 th->t_handle_save = cur_th;
3213 BUG_ON(cur_th && cur_th->t_refcount > 1);
3214 return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT);
3215}
3216
3217int journal_begin(struct reiserfs_transaction_handle *th,
3218 struct super_block *sb, unsigned long nblocks)
3219{
3220 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3221 int ret;
3222
3223 th->t_handle_save = NULL;
3224 if (cur_th) {
3225
3226 if (cur_th->t_super == sb) {
3227 BUG_ON(!cur_th->t_refcount);
3228 cur_th->t_refcount++;
3229 memcpy(th, cur_th, sizeof(*th));
3230 if (th->t_refcount <= 1)
3231 reiserfs_warning(sb, "reiserfs-2005",
3232 "BAD: refcount <= 1, but "
3233 "journal_info != 0");
3234 return 0;
3235 } else {
3236
3237
3238
3239
3240
3241 reiserfs_warning(sb, "clm-2100",
3242 "nesting info a different FS");
3243 th->t_handle_save = current->journal_info;
3244 current->journal_info = th;
3245 }
3246 } else {
3247 current->journal_info = th;
3248 }
3249 ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG);
3250 BUG_ON(current->journal_info != th);
3251
3252
3253
3254
3255
3256 if (ret)
3257 current->journal_info = th->t_handle_save;
3258 else
3259 BUG_ON(!th->t_refcount);
3260
3261 return ret;
3262}
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274int journal_mark_dirty(struct reiserfs_transaction_handle *th,
3275 struct buffer_head *bh)
3276{
3277 struct super_block *sb = th->t_super;
3278 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3279 struct reiserfs_journal_cnode *cn = NULL;
3280 int count_already_incd = 0;
3281 int prepared = 0;
3282 BUG_ON(!th->t_trans_id);
3283
3284 PROC_INFO_INC(sb, journal.mark_dirty);
3285 if (th->t_trans_id != journal->j_trans_id) {
3286 reiserfs_panic(th->t_super, "journal-1577",
3287 "handle trans id %ld != current trans id %ld",
3288 th->t_trans_id, journal->j_trans_id);
3289 }
3290
3291 prepared = test_clear_buffer_journal_prepared(bh);
3292 clear_buffer_journal_restore_dirty(bh);
3293
3294 if (buffer_journaled(bh)) {
3295 PROC_INFO_INC(sb, journal.mark_dirty_already);
3296 return 0;
3297 }
3298
3299
3300
3301
3302
3303
3304 if (!prepared || buffer_dirty(bh)) {
3305 reiserfs_warning(sb, "journal-1777",
3306 "buffer %llu bad state "
3307 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3308 (unsigned long long)bh->b_blocknr,
3309 prepared ? ' ' : '!',
3310 buffer_locked(bh) ? ' ' : '!',
3311 buffer_dirty(bh) ? ' ' : '!',
3312 buffer_journal_dirty(bh) ? ' ' : '!');
3313 }
3314
3315 if (atomic_read(&journal->j_wcount) <= 0) {
3316 reiserfs_warning(sb, "journal-1409",
3317 "returning because j_wcount was %d",
3318 atomic_read(&journal->j_wcount));
3319 return 1;
3320 }
3321
3322
3323
3324
3325
3326 if (journal->j_len >= journal->j_trans_max) {
3327 reiserfs_panic(th->t_super, "journal-1413",
3328 "j_len (%lu) is too big",
3329 journal->j_len);
3330 }
3331
3332 if (buffer_journal_dirty(bh)) {
3333 count_already_incd = 1;
3334 PROC_INFO_INC(sb, journal.mark_dirty_notjournal);
3335 clear_buffer_journal_dirty(bh);
3336 }
3337
3338 if (journal->j_len > journal->j_len_alloc) {
3339 journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT;
3340 }
3341
3342 set_buffer_journaled(bh);
3343
3344
3345 if (!cn) {
3346 cn = get_cnode(sb);
3347 if (!cn) {
3348 reiserfs_panic(sb, "journal-4", "get_cnode failed!");
3349 }
3350
3351 if (th->t_blocks_logged == th->t_blocks_allocated) {
3352 th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT;
3353 journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT;
3354 }
3355 th->t_blocks_logged++;
3356 journal->j_len++;
3357
3358 cn->bh = bh;
3359 cn->blocknr = bh->b_blocknr;
3360 cn->sb = sb;
3361 cn->jlist = NULL;
3362 insert_journal_hash(journal->j_hash_table, cn);
3363 if (!count_already_incd) {
3364 get_bh(bh);
3365 }
3366 }
3367 cn->next = NULL;
3368 cn->prev = journal->j_last;
3369 cn->bh = bh;
3370 if (journal->j_last) {
3371 journal->j_last->next = cn;
3372 journal->j_last = cn;
3373 } else {
3374 journal->j_first = cn;
3375 journal->j_last = cn;
3376 }
3377 reiserfs_schedule_old_flush(sb);
3378 return 0;
3379}
3380
3381int journal_end(struct reiserfs_transaction_handle *th)
3382{
3383 struct super_block *sb = th->t_super;
3384 if (!current->journal_info && th->t_refcount > 1)
3385 reiserfs_warning(sb, "REISER-NESTING",
3386 "th NULL, refcount %d", th->t_refcount);
3387
3388 if (!th->t_trans_id) {
3389 WARN_ON(1);
3390 return -EIO;
3391 }
3392
3393 th->t_refcount--;
3394 if (th->t_refcount > 0) {
3395 struct reiserfs_transaction_handle *cur_th =
3396 current->journal_info;
3397
3398
3399
3400
3401
3402 BUG_ON(cur_th->t_super != th->t_super);
3403
3404 if (th != cur_th) {
3405 memcpy(current->journal_info, th, sizeof(*th));
3406 th->t_trans_id = 0;
3407 }
3408 return 0;
3409 } else {
3410 return do_journal_end(th, 0);
3411 }
3412}
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422static int remove_from_transaction(struct super_block *sb,
3423 b_blocknr_t blocknr, int already_cleaned)
3424{
3425 struct buffer_head *bh;
3426 struct reiserfs_journal_cnode *cn;
3427 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3428 int ret = 0;
3429
3430 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3431 if (!cn || !cn->bh) {
3432 return ret;
3433 }
3434 bh = cn->bh;
3435 if (cn->prev) {
3436 cn->prev->next = cn->next;
3437 }
3438 if (cn->next) {
3439 cn->next->prev = cn->prev;
3440 }
3441 if (cn == journal->j_first) {
3442 journal->j_first = cn->next;
3443 }
3444 if (cn == journal->j_last) {
3445 journal->j_last = cn->prev;
3446 }
3447 if (bh)
3448 remove_journal_hash(sb, journal->j_hash_table, NULL,
3449 bh->b_blocknr, 0);
3450 clear_buffer_journaled(bh);
3451
3452 if (!already_cleaned) {
3453 clear_buffer_journal_dirty(bh);
3454 clear_buffer_dirty(bh);
3455 clear_buffer_journal_test(bh);
3456 put_bh(bh);
3457 if (atomic_read(&bh->b_count) < 0) {
3458 reiserfs_warning(sb, "journal-1752",
3459 "b_count < 0");
3460 }
3461 ret = 1;
3462 }
3463 journal->j_len--;
3464 journal->j_len_alloc--;
3465 free_cnode(sb, cn);
3466 return ret;
3467}
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480static int can_dirty(struct reiserfs_journal_cnode *cn)
3481{
3482 struct super_block *sb = cn->sb;
3483 b_blocknr_t blocknr = cn->blocknr;
3484 struct reiserfs_journal_cnode *cur = cn->hprev;
3485 int can_dirty = 1;
3486
3487
3488
3489
3490
3491
3492 while (cur && can_dirty) {
3493 if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb &&
3494 cur->blocknr == blocknr) {
3495 can_dirty = 0;
3496 }
3497 cur = cur->hprev;
3498 }
3499
3500
3501
3502
3503 cur = cn->hnext;
3504 while (cur && can_dirty) {
3505 if (cur->jlist && cur->jlist->j_len > 0 &&
3506 atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh &&
3507 cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
3508 can_dirty = 0;
3509 }
3510 cur = cur->hnext;
3511 }
3512 return can_dirty;
3513}
3514
3515
3516
3517
3518
3519int journal_end_sync(struct reiserfs_transaction_handle *th)
3520{
3521 struct super_block *sb = th->t_super;
3522 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3523
3524 BUG_ON(!th->t_trans_id);
3525
3526 BUG_ON(th->t_refcount > 1);
3527 if (journal->j_len == 0) {
3528 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3529 1);
3530 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
3531 }
3532 return do_journal_end(th, COMMIT_NOW | WAIT);
3533}
3534
3535
3536static void flush_async_commits(struct work_struct *work)
3537{
3538 struct reiserfs_journal *journal =
3539 container_of(work, struct reiserfs_journal, j_work.work);
3540 struct super_block *sb = journal->j_work_sb;
3541 struct reiserfs_journal_list *jl;
3542 struct list_head *entry;
3543
3544 reiserfs_write_lock(sb);
3545 if (!list_empty(&journal->j_journal_list)) {
3546
3547 entry = journal->j_journal_list.prev;
3548 jl = JOURNAL_LIST_ENTRY(entry);
3549 flush_commit_list(sb, jl, 1);
3550 }
3551 reiserfs_write_unlock(sb);
3552}
3553
3554
3555
3556
3557
3558void reiserfs_flush_old_commits(struct super_block *sb)
3559{
3560 time64_t now;
3561 struct reiserfs_transaction_handle th;
3562 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3563
3564 now = ktime_get_seconds();
3565
3566
3567
3568
3569 if (list_empty(&journal->j_journal_list))
3570 return;
3571
3572
3573
3574
3575
3576 if (atomic_read(&journal->j_wcount) <= 0 &&
3577 journal->j_trans_start_time > 0 &&
3578 journal->j_len > 0 &&
3579 (now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3580 if (!journal_join(&th, sb)) {
3581 reiserfs_prepare_for_journal(sb,
3582 SB_BUFFER_WITH_SB(sb),
3583 1);
3584 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3585
3586
3587
3588
3589
3590
3591 do_journal_end(&th, COMMIT_NOW | WAIT);
3592 }
3593 }
3594}
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611static int check_journal_end(struct reiserfs_transaction_handle *th, int flags)
3612{
3613
3614 time64_t now;
3615 int flush = flags & FLUSH_ALL;
3616 int commit_now = flags & COMMIT_NOW;
3617 int wait_on_commit = flags & WAIT;
3618 struct reiserfs_journal_list *jl;
3619 struct super_block *sb = th->t_super;
3620 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3621
3622 BUG_ON(!th->t_trans_id);
3623
3624 if (th->t_trans_id != journal->j_trans_id) {
3625 reiserfs_panic(th->t_super, "journal-1577",
3626 "handle trans id %ld != current trans id %ld",
3627 th->t_trans_id, journal->j_trans_id);
3628 }
3629
3630 journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged);
3631
3632 if (atomic_read(&journal->j_wcount) > 0)
3633 atomic_dec(&journal->j_wcount);
3634
3635
3636
3637
3638
3639
3640
3641 BUG_ON(journal->j_len == 0);
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651 if (atomic_read(&journal->j_wcount) > 0) {
3652 if (flush || commit_now) {
3653 unsigned trans_id;
3654
3655 jl = journal->j_current_jl;
3656 trans_id = jl->j_trans_id;
3657 if (wait_on_commit)
3658 jl->j_state |= LIST_COMMIT_PENDING;
3659 atomic_set(&journal->j_jlock, 1);
3660 if (flush) {
3661 journal->j_next_full_flush = 1;
3662 }
3663 unlock_journal(sb);
3664
3665
3666
3667
3668
3669 while (journal->j_trans_id == trans_id) {
3670 if (atomic_read(&journal->j_jlock)) {
3671 queue_log_writer(sb);
3672 } else {
3673 lock_journal(sb);
3674 if (journal->j_trans_id == trans_id) {
3675 atomic_set(&journal->j_jlock,
3676 1);
3677 }
3678 unlock_journal(sb);
3679 }
3680 }
3681 BUG_ON(journal->j_trans_id == trans_id);
3682
3683 if (commit_now
3684 && journal_list_still_alive(sb, trans_id)
3685 && wait_on_commit) {
3686 flush_commit_list(sb, jl, 1);
3687 }
3688 return 0;
3689 }
3690 unlock_journal(sb);
3691 return 0;
3692 }
3693
3694
3695 now = ktime_get_seconds();
3696 if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3697 commit_now = 1;
3698 journal->j_next_async_flush = 1;
3699 }
3700
3701
3702 if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock))
3703 && !flush && !commit_now && (journal->j_len < journal->j_max_batch)
3704 && journal->j_len_alloc < journal->j_max_batch
3705 && journal->j_cnode_free > (journal->j_trans_max * 3)) {
3706 journal->j_bcount++;
3707 unlock_journal(sb);
3708 return 0;
3709 }
3710
3711 if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) {
3712 reiserfs_panic(sb, "journal-003",
3713 "j_start (%ld) is too high",
3714 journal->j_start);
3715 }
3716 return 1;
3717}
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736int journal_mark_freed(struct reiserfs_transaction_handle *th,
3737 struct super_block *sb, b_blocknr_t blocknr)
3738{
3739 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3740 struct reiserfs_journal_cnode *cn = NULL;
3741 struct buffer_head *bh = NULL;
3742 struct reiserfs_list_bitmap *jb = NULL;
3743 int cleaned = 0;
3744 BUG_ON(!th->t_trans_id);
3745
3746 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3747 if (cn && cn->bh) {
3748 bh = cn->bh;
3749 get_bh(bh);
3750 }
3751
3752 if (bh && buffer_journal_new(bh)) {
3753 clear_buffer_journal_new(bh);
3754 clear_prepared_bits(bh);
3755 reiserfs_clean_and_file_buffer(bh);
3756 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3757 } else {
3758
3759
3760
3761
3762 jb = journal->j_current_jl->j_list_bitmap;
3763 if (!jb) {
3764 reiserfs_panic(sb, "journal-1702",
3765 "journal_list_bitmap is NULL");
3766 }
3767 set_bit_in_list_bitmap(sb, blocknr, jb);
3768
3769
3770
3771 if (bh) {
3772 clear_prepared_bits(bh);
3773 reiserfs_clean_and_file_buffer(bh);
3774 }
3775 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3776
3777
3778
3779
3780
3781 cn = get_journal_hash_dev(sb, journal->j_list_hash_table,
3782 blocknr);
3783 while (cn) {
3784 if (sb == cn->sb && blocknr == cn->blocknr) {
3785 set_bit(BLOCK_FREED, &cn->state);
3786 if (cn->bh) {
3787
3788
3789
3790
3791
3792 if (!cleaned) {
3793 clear_buffer_journal_dirty(cn->
3794 bh);
3795 clear_buffer_dirty(cn->bh);
3796 clear_buffer_journal_test(cn->
3797 bh);
3798 cleaned = 1;
3799 put_bh(cn->bh);
3800 if (atomic_read
3801 (&cn->bh->b_count) < 0) {
3802 reiserfs_warning(sb,
3803 "journal-2138",
3804 "cn->bh->b_count < 0");
3805 }
3806 }
3807
3808
3809
3810
3811 if (cn->jlist) {
3812 atomic_dec(&cn->jlist->
3813 j_nonzerolen);
3814 }
3815 cn->bh = NULL;
3816 }
3817 }
3818 cn = cn->hnext;
3819 }
3820 }
3821
3822 if (bh)
3823 release_buffer_page(bh);
3824 return 0;
3825}
3826
3827void reiserfs_update_inode_transaction(struct inode *inode)
3828{
3829 struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb);
3830 REISERFS_I(inode)->i_jl = journal->j_current_jl;
3831 REISERFS_I(inode)->i_trans_id = journal->j_trans_id;
3832}
3833
3834
3835
3836
3837
3838static int __commit_trans_jl(struct inode *inode, unsigned long id,
3839 struct reiserfs_journal_list *jl)
3840{
3841 struct reiserfs_transaction_handle th;
3842 struct super_block *sb = inode->i_sb;
3843 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3844 int ret = 0;
3845
3846
3847
3848
3849
3850 if (id == journal->j_trans_id) {
3851 jl = journal->j_current_jl;
3852
3853
3854
3855
3856 let_transaction_grow(sb, id);
3857 if (journal->j_trans_id != id) {
3858 goto flush_commit_only;
3859 }
3860
3861 ret = journal_begin(&th, sb, 1);
3862 if (ret)
3863 return ret;
3864
3865
3866 if (journal->j_trans_id != id) {
3867 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3868 1);
3869 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3870 ret = journal_end(&th);
3871 goto flush_commit_only;
3872 }
3873
3874 ret = journal_end_sync(&th);
3875 if (!ret)
3876 ret = 1;
3877
3878 } else {
3879
3880
3881
3882
3883
3884flush_commit_only:
3885 if (journal_list_still_alive(inode->i_sb, id)) {
3886
3887
3888
3889
3890
3891 if (atomic_read(&jl->j_commit_left) > 1)
3892 ret = 1;
3893 flush_commit_list(sb, jl, 1);
3894 if (journal->j_errno)
3895 ret = journal->j_errno;
3896 }
3897 }
3898
3899 return ret;
3900}
3901
3902int reiserfs_commit_for_inode(struct inode *inode)
3903{
3904 unsigned int id = REISERFS_I(inode)->i_trans_id;
3905 struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
3906
3907
3908
3909
3910
3911 if (!id || !jl) {
3912 reiserfs_update_inode_transaction(inode);
3913 id = REISERFS_I(inode)->i_trans_id;
3914
3915 }
3916
3917 return __commit_trans_jl(inode, id, jl);
3918}
3919
3920void reiserfs_restore_prepared_buffer(struct super_block *sb,
3921 struct buffer_head *bh)
3922{
3923 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3924 PROC_INFO_INC(sb, journal.restore_prepared);
3925 if (!bh) {
3926 return;
3927 }
3928 if (test_clear_buffer_journal_restore_dirty(bh) &&
3929 buffer_journal_dirty(bh)) {
3930 struct reiserfs_journal_cnode *cn;
3931 reiserfs_write_lock(sb);
3932 cn = get_journal_hash_dev(sb,
3933 journal->j_list_hash_table,
3934 bh->b_blocknr);
3935 if (cn && can_dirty(cn)) {
3936 set_buffer_journal_test(bh);
3937 mark_buffer_dirty(bh);
3938 }
3939 reiserfs_write_unlock(sb);
3940 }
3941 clear_buffer_journal_prepared(bh);
3942}
3943
3944extern struct tree_balance *cur_tb;
3945
3946
3947
3948
3949
3950
3951int reiserfs_prepare_for_journal(struct super_block *sb,
3952 struct buffer_head *bh, int wait)
3953{
3954 PROC_INFO_INC(sb, journal.prepare);
3955
3956 if (!trylock_buffer(bh)) {
3957 if (!wait)
3958 return 0;
3959 lock_buffer(bh);
3960 }
3961 set_buffer_journal_prepared(bh);
3962 if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) {
3963 clear_buffer_journal_test(bh);
3964 set_buffer_journal_restore_dirty(bh);
3965 }
3966 unlock_buffer(bh);
3967 return 1;
3968}
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980static int do_journal_end(struct reiserfs_transaction_handle *th, int flags)
3981{
3982 struct super_block *sb = th->t_super;
3983 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3984 struct reiserfs_journal_cnode *cn, *next, *jl_cn;
3985 struct reiserfs_journal_cnode *last_cn = NULL;
3986 struct reiserfs_journal_desc *desc;
3987 struct reiserfs_journal_commit *commit;
3988 struct buffer_head *c_bh;
3989 struct buffer_head *d_bh;
3990 int cur_write_start = 0;
3991 int old_start;
3992 int i;
3993 int flush;
3994 int wait_on_commit;
3995 struct reiserfs_journal_list *jl, *temp_jl;
3996 struct list_head *entry, *safe;
3997 unsigned long jindex;
3998 unsigned int commit_trans_id;
3999 int trans_half;
4000 int depth;
4001
4002 BUG_ON(th->t_refcount > 1);
4003 BUG_ON(!th->t_trans_id);
4004 BUG_ON(!th->t_super);
4005
4006
4007
4008
4009
4010 if (th->t_trans_id == ~0U)
4011 flags |= FLUSH_ALL | COMMIT_NOW | WAIT;
4012 flush = flags & FLUSH_ALL;
4013 wait_on_commit = flags & WAIT;
4014
4015 current->journal_info = th->t_handle_save;
4016 reiserfs_check_lock_depth(sb, "journal end");
4017 if (journal->j_len == 0) {
4018 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
4019 1);
4020 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
4021 }
4022
4023 lock_journal(sb);
4024 if (journal->j_next_full_flush) {
4025 flags |= FLUSH_ALL;
4026 flush = 1;
4027 }
4028 if (journal->j_next_async_flush) {
4029 flags |= COMMIT_NOW | WAIT;
4030 wait_on_commit = 1;
4031 }
4032
4033
4034
4035
4036
4037
4038 if (!check_journal_end(th, flags)) {
4039 reiserfs_schedule_old_flush(sb);
4040 wake_queued_writers(sb);
4041 reiserfs_async_progress_wait(sb);
4042 goto out;
4043 }
4044
4045
4046 if (journal->j_next_full_flush) {
4047 flush = 1;
4048 }
4049
4050
4051
4052
4053
4054 if (journal->j_must_wait > 0) {
4055 flush = 1;
4056 }
4057#ifdef REISERFS_PREALLOCATE
4058
4059
4060
4061
4062 current->journal_info = th;
4063 th->t_refcount++;
4064
4065
4066 reiserfs_discard_all_prealloc(th);
4067
4068 th->t_refcount--;
4069 current->journal_info = th->t_handle_save;
4070#endif
4071
4072
4073 d_bh =
4074 journal_getblk(sb,
4075 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4076 journal->j_start);
4077 set_buffer_uptodate(d_bh);
4078 desc = (struct reiserfs_journal_desc *)(d_bh)->b_data;
4079 memset(d_bh->b_data, 0, d_bh->b_size);
4080 memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8);
4081 set_desc_trans_id(desc, journal->j_trans_id);
4082
4083
4084
4085
4086
4087 c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4088 ((journal->j_start + journal->j_len +
4089 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
4090 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
4091 memset(c_bh->b_data, 0, c_bh->b_size);
4092 set_commit_trans_id(commit, journal->j_trans_id);
4093 set_buffer_uptodate(c_bh);
4094
4095
4096 jl = journal->j_current_jl;
4097
4098
4099
4100
4101
4102
4103
4104 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb);
4105
4106
4107 commit_trans_id = jl->j_trans_id;
4108
4109 atomic_set(&jl->j_older_commits_done, 0);
4110 jl->j_trans_id = journal->j_trans_id;
4111 jl->j_timestamp = journal->j_trans_start_time;
4112 jl->j_commit_bh = c_bh;
4113 jl->j_start = journal->j_start;
4114 jl->j_len = journal->j_len;
4115 atomic_set(&jl->j_nonzerolen, journal->j_len);
4116 atomic_set(&jl->j_commit_left, journal->j_len + 2);
4117 jl->j_realblock = NULL;
4118
4119
4120
4121
4122
4123
4124 trans_half = journal_trans_half(sb->s_blocksize);
4125 for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) {
4126 if (buffer_journaled(cn->bh)) {
4127 jl_cn = get_cnode(sb);
4128 if (!jl_cn) {
4129 reiserfs_panic(sb, "journal-1676",
4130 "get_cnode returned NULL");
4131 }
4132 if (i == 0) {
4133 jl->j_realblock = jl_cn;
4134 }
4135 jl_cn->prev = last_cn;
4136 jl_cn->next = NULL;
4137 if (last_cn) {
4138 last_cn->next = jl_cn;
4139 }
4140 last_cn = jl_cn;
4141
4142
4143
4144
4145 if (is_block_in_log_or_reserved_area
4146 (sb, cn->bh->b_blocknr)) {
4147 reiserfs_panic(sb, "journal-2332",
4148 "Trying to log block %lu, "
4149 "which is a log block",
4150 cn->bh->b_blocknr);
4151 }
4152 jl_cn->blocknr = cn->bh->b_blocknr;
4153 jl_cn->state = 0;
4154 jl_cn->sb = sb;
4155 jl_cn->bh = cn->bh;
4156 jl_cn->jlist = jl;
4157 insert_journal_hash(journal->j_list_hash_table, jl_cn);
4158 if (i < trans_half) {
4159 desc->j_realblock[i] =
4160 cpu_to_le32(cn->bh->b_blocknr);
4161 } else {
4162 commit->j_realblock[i - trans_half] =
4163 cpu_to_le32(cn->bh->b_blocknr);
4164 }
4165 } else {
4166 i--;
4167 }
4168 }
4169 set_desc_trans_len(desc, journal->j_len);
4170 set_desc_mount_id(desc, journal->j_mount_id);
4171 set_desc_trans_id(desc, journal->j_trans_id);
4172 set_commit_trans_len(commit, journal->j_len);
4173
4174
4175
4176
4177
4178 BUG_ON(journal->j_len == 0);
4179
4180
4181
4182
4183
4184
4185 mark_buffer_dirty(d_bh);
4186
4187
4188
4189
4190
4191 cur_write_start = journal->j_start;
4192 cn = journal->j_first;
4193 jindex = 1;
4194 while (cn) {
4195 clear_buffer_journal_new(cn->bh);
4196
4197 if (buffer_journaled(cn->bh)) {
4198 struct buffer_head *tmp_bh;
4199 char *addr;
4200 struct page *page;
4201 tmp_bh =
4202 journal_getblk(sb,
4203 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4204 ((cur_write_start +
4205 jindex) %
4206 SB_ONDISK_JOURNAL_SIZE(sb)));
4207 set_buffer_uptodate(tmp_bh);
4208 page = cn->bh->b_page;
4209 addr = kmap(page);
4210 memcpy(tmp_bh->b_data,
4211 addr + offset_in_page(cn->bh->b_data),
4212 cn->bh->b_size);
4213 kunmap(page);
4214 mark_buffer_dirty(tmp_bh);
4215 jindex++;
4216 set_buffer_journal_dirty(cn->bh);
4217 clear_buffer_journaled(cn->bh);
4218 } else {
4219
4220
4221
4222
4223 reiserfs_warning(sb, "journal-2048",
4224 "BAD, buffer in journal hash, "
4225 "but not JDirty!");
4226 brelse(cn->bh);
4227 }
4228 next = cn->next;
4229 free_cnode(sb, cn);
4230 cn = next;
4231 reiserfs_cond_resched(sb);
4232 }
4233
4234
4235
4236
4237
4238
4239
4240 journal->j_current_jl = alloc_journal_list(sb);
4241
4242
4243 list_add_tail(&jl->j_list, &journal->j_journal_list);
4244 list_add_tail(&jl->j_working_list, &journal->j_working_list);
4245 journal->j_num_work_lists++;
4246
4247
4248 old_start = journal->j_start;
4249 journal->j_start =
4250 (journal->j_start + journal->j_len +
4251 2) % SB_ONDISK_JOURNAL_SIZE(sb);
4252 atomic_set(&journal->j_wcount, 0);
4253 journal->j_bcount = 0;
4254 journal->j_last = NULL;
4255 journal->j_first = NULL;
4256 journal->j_len = 0;
4257 journal->j_trans_start_time = 0;
4258
4259 if (++journal->j_trans_id == 0)
4260 journal->j_trans_id = 10;
4261 journal->j_current_jl->j_trans_id = journal->j_trans_id;
4262 journal->j_must_wait = 0;
4263 journal->j_len_alloc = 0;
4264 journal->j_next_full_flush = 0;
4265 journal->j_next_async_flush = 0;
4266 init_journal_hash(sb);
4267
4268
4269
4270
4271
4272 smp_mb();
4273
4274
4275
4276
4277
4278
4279
4280
4281 if (!list_empty(&jl->j_tail_bh_list)) {
4282 depth = reiserfs_write_unlock_nested(sb);
4283 write_ordered_buffers(&journal->j_dirty_buffers_lock,
4284 journal, jl, &jl->j_tail_bh_list);
4285 reiserfs_write_lock_nested(sb, depth);
4286 }
4287 BUG_ON(!list_empty(&jl->j_tail_bh_list));
4288 mutex_unlock(&jl->j_commit_mutex);
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298 if (flush) {
4299 flush_commit_list(sb, jl, 1);
4300 flush_journal_list(sb, jl, 1);
4301 } else if (!(jl->j_state & LIST_COMMIT_PENDING)) {
4302
4303
4304
4305
4306 if (sb->s_flags & SB_ACTIVE)
4307 queue_delayed_work(REISERFS_SB(sb)->commit_wq,
4308 &journal->j_work, HZ / 10);
4309 }
4310
4311
4312
4313
4314
4315
4316first_jl:
4317 list_for_each_safe(entry, safe, &journal->j_journal_list) {
4318 temp_jl = JOURNAL_LIST_ENTRY(entry);
4319 if (journal->j_start <= temp_jl->j_start) {
4320 if ((journal->j_start + journal->j_trans_max + 1) >=
4321 temp_jl->j_start) {
4322 flush_used_journal_lists(sb, temp_jl);
4323 goto first_jl;
4324 } else if ((journal->j_start +
4325 journal->j_trans_max + 1) <
4326 SB_ONDISK_JOURNAL_SIZE(sb)) {
4327
4328
4329
4330
4331
4332
4333 break;
4334 }
4335 } else if ((journal->j_start +
4336 journal->j_trans_max + 1) >
4337 SB_ONDISK_JOURNAL_SIZE(sb)) {
4338 if (((journal->j_start + journal->j_trans_max + 1) %
4339 SB_ONDISK_JOURNAL_SIZE(sb)) >=
4340 temp_jl->j_start) {
4341 flush_used_journal_lists(sb, temp_jl);
4342 goto first_jl;
4343 } else {
4344
4345
4346
4347
4348
4349
4350 break;
4351 }
4352 }
4353 }
4354
4355 journal->j_current_jl->j_list_bitmap =
4356 get_list_bitmap(sb, journal->j_current_jl);
4357
4358 if (!(journal->j_current_jl->j_list_bitmap)) {
4359 reiserfs_panic(sb, "journal-1996",
4360 "could not get a list bitmap");
4361 }
4362
4363 atomic_set(&journal->j_jlock, 0);
4364 unlock_journal(sb);
4365
4366 clear_bit(J_WRITERS_QUEUED, &journal->j_state);
4367 wake_up(&journal->j_join_wait);
4368
4369 if (!flush && wait_on_commit &&
4370 journal_list_still_alive(sb, commit_trans_id)) {
4371 flush_commit_list(sb, jl, 1);
4372 }
4373out:
4374 reiserfs_check_lock_depth(sb, "journal end2");
4375
4376 memset(th, 0, sizeof(*th));
4377
4378
4379
4380
4381
4382 th->t_super = sb;
4383
4384 return journal->j_errno;
4385}
4386
4387
4388void reiserfs_abort_journal(struct super_block *sb, int errno)
4389{
4390 struct reiserfs_journal *journal = SB_JOURNAL(sb);
4391 if (test_bit(J_ABORTED, &journal->j_state))
4392 return;
4393
4394 if (!journal->j_errno)
4395 journal->j_errno = errno;
4396
4397 sb->s_flags |= SB_RDONLY;
4398 set_bit(J_ABORTED, &journal->j_state);
4399
4400#ifdef CONFIG_REISERFS_CHECK
4401 dump_stack();
4402#endif
4403}
4404