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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 int 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(num_cnodes * sizeof(struct reiserfs_journal_cnode));
354 if (!head) {
355 return NULL;
356 }
357 head[0].prev = NULL;
358 head[0].next = head + 1;
359 for (i = 1; i < num_cnodes; i++) {
360 head[i].prev = head + (i - 1);
361 head[i].next = head + (i + 1);
362 }
363 head[num_cnodes - 1].next = NULL;
364 return head;
365}
366
367
368static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb)
369{
370 struct reiserfs_journal_cnode *cn;
371 struct reiserfs_journal *journal = SB_JOURNAL(sb);
372
373 reiserfs_check_lock_depth(sb, "get_cnode");
374
375 if (journal->j_cnode_free <= 0) {
376 return NULL;
377 }
378 journal->j_cnode_used++;
379 journal->j_cnode_free--;
380 cn = journal->j_cnode_free_list;
381 if (!cn) {
382 return cn;
383 }
384 if (cn->next) {
385 cn->next->prev = NULL;
386 }
387 journal->j_cnode_free_list = cn->next;
388 memset(cn, 0, sizeof(struct reiserfs_journal_cnode));
389 return cn;
390}
391
392
393
394
395static void free_cnode(struct super_block *sb,
396 struct reiserfs_journal_cnode *cn)
397{
398 struct reiserfs_journal *journal = SB_JOURNAL(sb);
399
400 reiserfs_check_lock_depth(sb, "free_cnode");
401
402 journal->j_cnode_used--;
403 journal->j_cnode_free++;
404
405 cn->next = journal->j_cnode_free_list;
406 if (journal->j_cnode_free_list) {
407 journal->j_cnode_free_list->prev = cn;
408 }
409 cn->prev = NULL;
410 journal->j_cnode_free_list = cn;
411}
412
413static void clear_prepared_bits(struct buffer_head *bh)
414{
415 clear_buffer_journal_prepared(bh);
416 clear_buffer_journal_restore_dirty(bh);
417}
418
419
420
421
422
423static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct
424 super_block
425 *sb,
426 struct
427 reiserfs_journal_cnode
428 **table,
429 long bl)
430{
431 struct reiserfs_journal_cnode *cn;
432 cn = journal_hash(table, sb, bl);
433 while (cn) {
434 if (cn->blocknr == bl && cn->sb == sb)
435 return cn;
436 cn = cn->hnext;
437 }
438 return (struct reiserfs_journal_cnode *)0;
439}
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460int reiserfs_in_journal(struct super_block *sb,
461 unsigned int bmap_nr, int bit_nr, int search_all,
462 b_blocknr_t * next_zero_bit)
463{
464 struct reiserfs_journal *journal = SB_JOURNAL(sb);
465 struct reiserfs_journal_cnode *cn;
466 struct reiserfs_list_bitmap *jb;
467 int i;
468 unsigned long bl;
469
470 *next_zero_bit = 0;
471
472 PROC_INFO_INC(sb, journal.in_journal);
473
474
475
476
477
478
479 if (search_all) {
480 for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
481 PROC_INFO_INC(sb, journal.in_journal_bitmap);
482 jb = journal->j_list_bitmap + i;
483 if (jb->journal_list && jb->bitmaps[bmap_nr] &&
484 test_bit(bit_nr,
485 (unsigned long *)jb->bitmaps[bmap_nr]->
486 data)) {
487 *next_zero_bit =
488 find_next_zero_bit((unsigned long *)
489 (jb->bitmaps[bmap_nr]->
490 data),
491 sb->s_blocksize << 3,
492 bit_nr + 1);
493 return 1;
494 }
495 }
496 }
497
498 bl = bmap_nr * (sb->s_blocksize << 3) + bit_nr;
499
500 if (search_all
501 && (cn =
502 get_journal_hash_dev(sb, journal->j_list_hash_table, bl))) {
503 return 1;
504 }
505
506
507 if ((cn = get_journal_hash_dev(sb, journal->j_hash_table, bl))) {
508 BUG();
509 return 1;
510 }
511
512 PROC_INFO_INC(sb, journal.in_journal_reusable);
513
514 return 0;
515}
516
517
518static inline void insert_journal_hash(struct reiserfs_journal_cnode **table,
519 struct reiserfs_journal_cnode *cn)
520{
521 struct reiserfs_journal_cnode *cn_orig;
522
523 cn_orig = journal_hash(table, cn->sb, cn->blocknr);
524 cn->hnext = cn_orig;
525 cn->hprev = NULL;
526 if (cn_orig) {
527 cn_orig->hprev = cn;
528 }
529 journal_hash(table, cn->sb, cn->blocknr) = cn;
530}
531
532
533static inline void lock_journal(struct super_block *sb)
534{
535 PROC_INFO_INC(sb, journal.lock_journal);
536
537 reiserfs_mutex_lock_safe(&SB_JOURNAL(sb)->j_mutex, sb);
538}
539
540
541static inline void unlock_journal(struct super_block *sb)
542{
543 mutex_unlock(&SB_JOURNAL(sb)->j_mutex);
544}
545
546static inline void get_journal_list(struct reiserfs_journal_list *jl)
547{
548 jl->j_refcount++;
549}
550
551static inline void put_journal_list(struct super_block *s,
552 struct reiserfs_journal_list *jl)
553{
554 if (jl->j_refcount < 1) {
555 reiserfs_panic(s, "journal-2", "trans id %u, refcount at %d",
556 jl->j_trans_id, jl->j_refcount);
557 }
558 if (--jl->j_refcount == 0)
559 kfree(jl);
560}
561
562
563
564
565
566
567static void cleanup_freed_for_journal_list(struct super_block *sb,
568 struct reiserfs_journal_list *jl)
569{
570
571 struct reiserfs_list_bitmap *jb = jl->j_list_bitmap;
572 if (jb) {
573 cleanup_bitmap_list(sb, jb);
574 }
575 jl->j_list_bitmap->journal_list = NULL;
576 jl->j_list_bitmap = NULL;
577}
578
579static int journal_list_still_alive(struct super_block *s,
580 unsigned int trans_id)
581{
582 struct reiserfs_journal *journal = SB_JOURNAL(s);
583 struct list_head *entry = &journal->j_journal_list;
584 struct reiserfs_journal_list *jl;
585
586 if (!list_empty(entry)) {
587 jl = JOURNAL_LIST_ENTRY(entry->next);
588 if (jl->j_trans_id <= trans_id) {
589 return 1;
590 }
591 }
592 return 0;
593}
594
595
596
597
598
599
600
601
602
603
604
605static void release_buffer_page(struct buffer_head *bh)
606{
607 struct page *page = bh->b_page;
608 if (!page->mapping && trylock_page(page)) {
609 get_page(page);
610 put_bh(bh);
611 if (!page->mapping)
612 try_to_free_buffers(page);
613 unlock_page(page);
614 put_page(page);
615 } else {
616 put_bh(bh);
617 }
618}
619
620static void reiserfs_end_buffer_io_sync(struct buffer_head *bh, int uptodate)
621{
622 if (buffer_journaled(bh)) {
623 reiserfs_warning(NULL, "clm-2084",
624 "pinned buffer %lu:%pg sent to disk",
625 bh->b_blocknr, bh->b_bdev);
626 }
627 if (uptodate)
628 set_buffer_uptodate(bh);
629 else
630 clear_buffer_uptodate(bh);
631
632 unlock_buffer(bh);
633 release_buffer_page(bh);
634}
635
636static void reiserfs_end_ordered_io(struct buffer_head *bh, int uptodate)
637{
638 if (uptodate)
639 set_buffer_uptodate(bh);
640 else
641 clear_buffer_uptodate(bh);
642 unlock_buffer(bh);
643 put_bh(bh);
644}
645
646static void submit_logged_buffer(struct buffer_head *bh)
647{
648 get_bh(bh);
649 bh->b_end_io = reiserfs_end_buffer_io_sync;
650 clear_buffer_journal_new(bh);
651 clear_buffer_dirty(bh);
652 if (!test_clear_buffer_journal_test(bh))
653 BUG();
654 if (!buffer_uptodate(bh))
655 BUG();
656 submit_bh(REQ_OP_WRITE, 0, bh);
657}
658
659static void submit_ordered_buffer(struct buffer_head *bh)
660{
661 get_bh(bh);
662 bh->b_end_io = reiserfs_end_ordered_io;
663 clear_buffer_dirty(bh);
664 if (!buffer_uptodate(bh))
665 BUG();
666 submit_bh(REQ_OP_WRITE, 0, bh);
667}
668
669#define CHUNK_SIZE 32
670struct buffer_chunk {
671 struct buffer_head *bh[CHUNK_SIZE];
672 int nr;
673};
674
675static void write_chunk(struct buffer_chunk *chunk)
676{
677 int i;
678 for (i = 0; i < chunk->nr; i++) {
679 submit_logged_buffer(chunk->bh[i]);
680 }
681 chunk->nr = 0;
682}
683
684static void write_ordered_chunk(struct buffer_chunk *chunk)
685{
686 int i;
687 for (i = 0; i < chunk->nr; i++) {
688 submit_ordered_buffer(chunk->bh[i]);
689 }
690 chunk->nr = 0;
691}
692
693static int add_to_chunk(struct buffer_chunk *chunk, struct buffer_head *bh,
694 spinlock_t * lock, void (fn) (struct buffer_chunk *))
695{
696 int ret = 0;
697 BUG_ON(chunk->nr >= CHUNK_SIZE);
698 chunk->bh[chunk->nr++] = bh;
699 if (chunk->nr >= CHUNK_SIZE) {
700 ret = 1;
701 if (lock) {
702 spin_unlock(lock);
703 fn(chunk);
704 spin_lock(lock);
705 } else {
706 fn(chunk);
707 }
708 }
709 return ret;
710}
711
712static atomic_t nr_reiserfs_jh = ATOMIC_INIT(0);
713static struct reiserfs_jh *alloc_jh(void)
714{
715 struct reiserfs_jh *jh;
716 while (1) {
717 jh = kmalloc(sizeof(*jh), GFP_NOFS);
718 if (jh) {
719 atomic_inc(&nr_reiserfs_jh);
720 return jh;
721 }
722 yield();
723 }
724}
725
726
727
728
729
730void reiserfs_free_jh(struct buffer_head *bh)
731{
732 struct reiserfs_jh *jh;
733
734 jh = bh->b_private;
735 if (jh) {
736 bh->b_private = NULL;
737 jh->bh = NULL;
738 list_del_init(&jh->list);
739 kfree(jh);
740 if (atomic_read(&nr_reiserfs_jh) <= 0)
741 BUG();
742 atomic_dec(&nr_reiserfs_jh);
743 put_bh(bh);
744 }
745}
746
747static inline int __add_jh(struct reiserfs_journal *j, struct buffer_head *bh,
748 int tail)
749{
750 struct reiserfs_jh *jh;
751
752 if (bh->b_private) {
753 spin_lock(&j->j_dirty_buffers_lock);
754 if (!bh->b_private) {
755 spin_unlock(&j->j_dirty_buffers_lock);
756 goto no_jh;
757 }
758 jh = bh->b_private;
759 list_del_init(&jh->list);
760 } else {
761no_jh:
762 get_bh(bh);
763 jh = alloc_jh();
764 spin_lock(&j->j_dirty_buffers_lock);
765
766
767
768
769 BUG_ON(bh->b_private);
770 jh->bh = bh;
771 bh->b_private = jh;
772 }
773 jh->jl = j->j_current_jl;
774 if (tail)
775 list_add_tail(&jh->list, &jh->jl->j_tail_bh_list);
776 else {
777 list_add_tail(&jh->list, &jh->jl->j_bh_list);
778 }
779 spin_unlock(&j->j_dirty_buffers_lock);
780 return 0;
781}
782
783int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh)
784{
785 return __add_jh(SB_JOURNAL(inode->i_sb), bh, 1);
786}
787int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh)
788{
789 return __add_jh(SB_JOURNAL(inode->i_sb), bh, 0);
790}
791
792#define JH_ENTRY(l) list_entry((l), struct reiserfs_jh, list)
793static int write_ordered_buffers(spinlock_t * lock,
794 struct reiserfs_journal *j,
795 struct reiserfs_journal_list *jl,
796 struct list_head *list)
797{
798 struct buffer_head *bh;
799 struct reiserfs_jh *jh;
800 int ret = j->j_errno;
801 struct buffer_chunk chunk;
802 struct list_head tmp;
803 INIT_LIST_HEAD(&tmp);
804
805 chunk.nr = 0;
806 spin_lock(lock);
807 while (!list_empty(list)) {
808 jh = JH_ENTRY(list->next);
809 bh = jh->bh;
810 get_bh(bh);
811 if (!trylock_buffer(bh)) {
812 if (!buffer_dirty(bh)) {
813 list_move(&jh->list, &tmp);
814 goto loop_next;
815 }
816 spin_unlock(lock);
817 if (chunk.nr)
818 write_ordered_chunk(&chunk);
819 wait_on_buffer(bh);
820 cond_resched();
821 spin_lock(lock);
822 goto loop_next;
823 }
824
825
826
827
828
829 if (!buffer_uptodate(bh) && buffer_dirty(bh)) {
830 clear_buffer_dirty(bh);
831 ret = -EIO;
832 }
833 if (buffer_dirty(bh)) {
834 list_move(&jh->list, &tmp);
835 add_to_chunk(&chunk, bh, lock, write_ordered_chunk);
836 } else {
837 reiserfs_free_jh(bh);
838 unlock_buffer(bh);
839 }
840loop_next:
841 put_bh(bh);
842 cond_resched_lock(lock);
843 }
844 if (chunk.nr) {
845 spin_unlock(lock);
846 write_ordered_chunk(&chunk);
847 spin_lock(lock);
848 }
849 while (!list_empty(&tmp)) {
850 jh = JH_ENTRY(tmp.prev);
851 bh = jh->bh;
852 get_bh(bh);
853 reiserfs_free_jh(bh);
854
855 if (buffer_locked(bh)) {
856 spin_unlock(lock);
857 wait_on_buffer(bh);
858 spin_lock(lock);
859 }
860 if (!buffer_uptodate(bh)) {
861 ret = -EIO;
862 }
863
864
865
866
867
868
869
870
871
872 if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) {
873 spin_unlock(lock);
874 ll_rw_block(REQ_OP_WRITE, 0, 1, &bh);
875 spin_lock(lock);
876 }
877 put_bh(bh);
878 cond_resched_lock(lock);
879 }
880 spin_unlock(lock);
881 return ret;
882}
883
884static int flush_older_commits(struct super_block *s,
885 struct reiserfs_journal_list *jl)
886{
887 struct reiserfs_journal *journal = SB_JOURNAL(s);
888 struct reiserfs_journal_list *other_jl;
889 struct reiserfs_journal_list *first_jl;
890 struct list_head *entry;
891 unsigned int trans_id = jl->j_trans_id;
892 unsigned int other_trans_id;
893 unsigned int first_trans_id;
894
895find_first:
896
897
898
899 first_jl = jl;
900 entry = jl->j_list.prev;
901 while (1) {
902 other_jl = JOURNAL_LIST_ENTRY(entry);
903 if (entry == &journal->j_journal_list ||
904 atomic_read(&other_jl->j_older_commits_done))
905 break;
906
907 first_jl = other_jl;
908 entry = other_jl->j_list.prev;
909 }
910
911
912 if (first_jl == jl) {
913 return 0;
914 }
915
916 first_trans_id = first_jl->j_trans_id;
917
918 entry = &first_jl->j_list;
919 while (1) {
920 other_jl = JOURNAL_LIST_ENTRY(entry);
921 other_trans_id = other_jl->j_trans_id;
922
923 if (other_trans_id < trans_id) {
924 if (atomic_read(&other_jl->j_commit_left) != 0) {
925 flush_commit_list(s, other_jl, 0);
926
927
928 if (!journal_list_still_alive(s, trans_id))
929 return 1;
930
931
932
933
934
935
936
937 if (!journal_list_still_alive
938 (s, other_trans_id)) {
939 goto find_first;
940 }
941 }
942 entry = entry->next;
943 if (entry == &journal->j_journal_list)
944 return 0;
945 } else {
946 return 0;
947 }
948 }
949 return 0;
950}
951
952static int reiserfs_async_progress_wait(struct super_block *s)
953{
954 struct reiserfs_journal *j = SB_JOURNAL(s);
955
956 if (atomic_read(&j->j_async_throttle)) {
957 int depth;
958
959 depth = reiserfs_write_unlock_nested(s);
960 congestion_wait(BLK_RW_ASYNC, HZ / 10);
961 reiserfs_write_lock_nested(s, depth);
962 }
963
964 return 0;
965}
966
967
968
969
970
971
972
973
974static int flush_commit_list(struct super_block *s,
975 struct reiserfs_journal_list *jl, int flushall)
976{
977 int i;
978 b_blocknr_t bn;
979 struct buffer_head *tbh = NULL;
980 unsigned int trans_id = jl->j_trans_id;
981 struct reiserfs_journal *journal = SB_JOURNAL(s);
982 int retval = 0;
983 int write_len;
984 int depth;
985
986 reiserfs_check_lock_depth(s, "flush_commit_list");
987
988 if (atomic_read(&jl->j_older_commits_done)) {
989 return 0;
990 }
991
992
993
994
995
996 BUG_ON(jl->j_len <= 0);
997 BUG_ON(trans_id == journal->j_trans_id);
998
999 get_journal_list(jl);
1000 if (flushall) {
1001 if (flush_older_commits(s, jl) == 1) {
1002
1003
1004
1005
1006 goto put_jl;
1007 }
1008 }
1009
1010
1011 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, s);
1012
1013 if (!journal_list_still_alive(s, trans_id)) {
1014 mutex_unlock(&jl->j_commit_mutex);
1015 goto put_jl;
1016 }
1017 BUG_ON(jl->j_trans_id == 0);
1018
1019
1020 if (atomic_read(&jl->j_commit_left) <= 0) {
1021 if (flushall) {
1022 atomic_set(&jl->j_older_commits_done, 1);
1023 }
1024 mutex_unlock(&jl->j_commit_mutex);
1025 goto put_jl;
1026 }
1027
1028 if (!list_empty(&jl->j_bh_list)) {
1029 int ret;
1030
1031
1032
1033
1034
1035 depth = reiserfs_write_unlock_nested(s);
1036 ret = write_ordered_buffers(&journal->j_dirty_buffers_lock,
1037 journal, jl, &jl->j_bh_list);
1038 if (ret < 0 && retval == 0)
1039 retval = ret;
1040 reiserfs_write_lock_nested(s, depth);
1041 }
1042 BUG_ON(!list_empty(&jl->j_bh_list));
1043
1044
1045
1046
1047
1048
1049
1050 atomic_inc(&journal->j_async_throttle);
1051 write_len = jl->j_len + 1;
1052 if (write_len < 256)
1053 write_len = 256;
1054 for (i = 0 ; i < write_len ; i++) {
1055 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) %
1056 SB_ONDISK_JOURNAL_SIZE(s);
1057 tbh = journal_find_get_block(s, bn);
1058 if (tbh) {
1059 if (buffer_dirty(tbh)) {
1060 depth = reiserfs_write_unlock_nested(s);
1061 ll_rw_block(REQ_OP_WRITE, 0, 1, &tbh);
1062 reiserfs_write_lock_nested(s, depth);
1063 }
1064 put_bh(tbh) ;
1065 }
1066 }
1067 atomic_dec(&journal->j_async_throttle);
1068
1069 for (i = 0; i < (jl->j_len + 1); i++) {
1070 bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) +
1071 (jl->j_start + i) % SB_ONDISK_JOURNAL_SIZE(s);
1072 tbh = journal_find_get_block(s, bn);
1073
1074 depth = reiserfs_write_unlock_nested(s);
1075 __wait_on_buffer(tbh);
1076 reiserfs_write_lock_nested(s, depth);
1077
1078
1079
1080
1081
1082 if (buffer_dirty(tbh)) {
1083 depth = reiserfs_write_unlock_nested(s);
1084 sync_dirty_buffer(tbh);
1085 reiserfs_write_lock_nested(s, depth);
1086 }
1087 if (unlikely(!buffer_uptodate(tbh))) {
1088#ifdef CONFIG_REISERFS_CHECK
1089 reiserfs_warning(s, "journal-601",
1090 "buffer write failed");
1091#endif
1092 retval = -EIO;
1093 }
1094
1095 put_bh(tbh);
1096
1097 put_bh(tbh);
1098 atomic_dec(&jl->j_commit_left);
1099 }
1100
1101 BUG_ON(atomic_read(&jl->j_commit_left) != 1);
1102
1103
1104
1105
1106
1107
1108
1109 if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
1110 if (buffer_dirty(jl->j_commit_bh))
1111 BUG();
1112 mark_buffer_dirty(jl->j_commit_bh) ;
1113 depth = reiserfs_write_unlock_nested(s);
1114 if (reiserfs_barrier_flush(s))
1115 __sync_dirty_buffer(jl->j_commit_bh,
1116 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1117 else
1118 sync_dirty_buffer(jl->j_commit_bh);
1119 reiserfs_write_lock_nested(s, depth);
1120 }
1121
1122
1123
1124
1125
1126
1127 if (unlikely(!buffer_uptodate(jl->j_commit_bh))) {
1128#ifdef CONFIG_REISERFS_CHECK
1129 reiserfs_warning(s, "journal-615", "buffer write failed");
1130#endif
1131 retval = -EIO;
1132 }
1133 bforget(jl->j_commit_bh);
1134 if (journal->j_last_commit_id != 0 &&
1135 (jl->j_trans_id - journal->j_last_commit_id) != 1) {
1136 reiserfs_warning(s, "clm-2200", "last commit %lu, current %lu",
1137 journal->j_last_commit_id, jl->j_trans_id);
1138 }
1139 journal->j_last_commit_id = jl->j_trans_id;
1140
1141
1142
1143
1144
1145 cleanup_freed_for_journal_list(s, jl);
1146
1147 retval = retval ? retval : journal->j_errno;
1148
1149
1150 if (!retval)
1151 dirty_one_transaction(s, jl);
1152 atomic_dec(&jl->j_commit_left);
1153
1154 if (flushall) {
1155 atomic_set(&jl->j_older_commits_done, 1);
1156 }
1157 mutex_unlock(&jl->j_commit_mutex);
1158put_jl:
1159 put_journal_list(s, jl);
1160
1161 if (retval)
1162 reiserfs_abort(s, retval, "Journal write error in %s",
1163 __func__);
1164 return retval;
1165}
1166
1167
1168
1169
1170
1171static struct reiserfs_journal_list *find_newer_jl_for_cn(struct
1172 reiserfs_journal_cnode
1173 *cn)
1174{
1175 struct super_block *sb = cn->sb;
1176 b_blocknr_t blocknr = cn->blocknr;
1177
1178 cn = cn->hprev;
1179 while (cn) {
1180 if (cn->sb == sb && cn->blocknr == blocknr && cn->jlist) {
1181 return cn->jlist;
1182 }
1183 cn = cn->hprev;
1184 }
1185 return NULL;
1186}
1187
1188static void remove_journal_hash(struct super_block *,
1189 struct reiserfs_journal_cnode **,
1190 struct reiserfs_journal_list *, unsigned long,
1191 int);
1192
1193
1194
1195
1196
1197
1198
1199static void remove_all_from_journal_list(struct super_block *sb,
1200 struct reiserfs_journal_list *jl,
1201 int debug)
1202{
1203 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1204 struct reiserfs_journal_cnode *cn, *last;
1205 cn = jl->j_realblock;
1206
1207
1208
1209
1210
1211 while (cn) {
1212 if (cn->blocknr != 0) {
1213 if (debug) {
1214 reiserfs_warning(sb, "reiserfs-2201",
1215 "block %u, bh is %d, state %ld",
1216 cn->blocknr, cn->bh ? 1 : 0,
1217 cn->state);
1218 }
1219 cn->state = 0;
1220 remove_journal_hash(sb, journal->j_list_hash_table,
1221 jl, cn->blocknr, 1);
1222 }
1223 last = cn;
1224 cn = cn->next;
1225 free_cnode(sb, last);
1226 }
1227 jl->j_realblock = NULL;
1228}
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238static int _update_journal_header_block(struct super_block *sb,
1239 unsigned long offset,
1240 unsigned int trans_id)
1241{
1242 struct reiserfs_journal_header *jh;
1243 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1244 int depth;
1245
1246 if (reiserfs_is_journal_aborted(journal))
1247 return -EIO;
1248
1249 if (trans_id >= journal->j_last_flush_trans_id) {
1250 if (buffer_locked((journal->j_header_bh))) {
1251 depth = reiserfs_write_unlock_nested(sb);
1252 __wait_on_buffer(journal->j_header_bh);
1253 reiserfs_write_lock_nested(sb, depth);
1254 if (unlikely(!buffer_uptodate(journal->j_header_bh))) {
1255#ifdef CONFIG_REISERFS_CHECK
1256 reiserfs_warning(sb, "journal-699",
1257 "buffer write failed");
1258#endif
1259 return -EIO;
1260 }
1261 }
1262 journal->j_last_flush_trans_id = trans_id;
1263 journal->j_first_unflushed_offset = offset;
1264 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->
1265 b_data);
1266 jh->j_last_flush_trans_id = cpu_to_le32(trans_id);
1267 jh->j_first_unflushed_offset = cpu_to_le32(offset);
1268 jh->j_mount_id = cpu_to_le32(journal->j_mount_id);
1269
1270 set_buffer_dirty(journal->j_header_bh);
1271 depth = reiserfs_write_unlock_nested(sb);
1272
1273 if (reiserfs_barrier_flush(sb))
1274 __sync_dirty_buffer(journal->j_header_bh,
1275 REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
1276 else
1277 sync_dirty_buffer(journal->j_header_bh);
1278
1279 reiserfs_write_lock_nested(sb, depth);
1280 if (!buffer_uptodate(journal->j_header_bh)) {
1281 reiserfs_warning(sb, "journal-837",
1282 "IO error during journal replay");
1283 return -EIO;
1284 }
1285 }
1286 return 0;
1287}
1288
1289static int update_journal_header_block(struct super_block *sb,
1290 unsigned long offset,
1291 unsigned int trans_id)
1292{
1293 return _update_journal_header_block(sb, offset, trans_id);
1294}
1295
1296
1297
1298
1299
1300static int flush_older_journal_lists(struct super_block *sb,
1301 struct reiserfs_journal_list *jl)
1302{
1303 struct list_head *entry;
1304 struct reiserfs_journal_list *other_jl;
1305 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1306 unsigned int trans_id = jl->j_trans_id;
1307
1308
1309
1310
1311
1312restart:
1313 entry = journal->j_journal_list.next;
1314
1315 if (entry == &journal->j_journal_list)
1316 return 0;
1317 other_jl = JOURNAL_LIST_ENTRY(entry);
1318 if (other_jl->j_trans_id < trans_id) {
1319 BUG_ON(other_jl->j_refcount <= 0);
1320
1321 flush_journal_list(sb, other_jl, 0);
1322
1323
1324 goto restart;
1325 }
1326 return 0;
1327}
1328
1329static void del_from_work_list(struct super_block *s,
1330 struct reiserfs_journal_list *jl)
1331{
1332 struct reiserfs_journal *journal = SB_JOURNAL(s);
1333 if (!list_empty(&jl->j_working_list)) {
1334 list_del_init(&jl->j_working_list);
1335 journal->j_num_work_lists--;
1336 }
1337}
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349static int flush_journal_list(struct super_block *s,
1350 struct reiserfs_journal_list *jl, int flushall)
1351{
1352 struct reiserfs_journal_list *pjl;
1353 struct reiserfs_journal_cnode *cn, *last;
1354 int count;
1355 int was_jwait = 0;
1356 int was_dirty = 0;
1357 struct buffer_head *saved_bh;
1358 unsigned long j_len_saved = jl->j_len;
1359 struct reiserfs_journal *journal = SB_JOURNAL(s);
1360 int err = 0;
1361 int depth;
1362
1363 BUG_ON(j_len_saved <= 0);
1364
1365 if (atomic_read(&journal->j_wcount) != 0) {
1366 reiserfs_warning(s, "clm-2048", "called with wcount %d",
1367 atomic_read(&journal->j_wcount));
1368 }
1369
1370
1371 if (flushall) {
1372 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1373 } else if (mutex_trylock(&journal->j_flush_mutex)) {
1374 BUG();
1375 }
1376
1377 count = 0;
1378 if (j_len_saved > journal->j_trans_max) {
1379 reiserfs_panic(s, "journal-715", "length is %lu, trans id %lu",
1380 j_len_saved, jl->j_trans_id);
1381 return 0;
1382 }
1383
1384
1385 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1386 atomic_read(&jl->j_commit_left) <= 0) {
1387 goto flush_older_and_return;
1388 }
1389
1390
1391
1392
1393
1394 flush_commit_list(s, jl, 1);
1395
1396 if (!(jl->j_state & LIST_DIRTY)
1397 && !reiserfs_is_journal_aborted(journal))
1398 BUG();
1399
1400
1401 if (atomic_read(&jl->j_nonzerolen) <= 0 &&
1402 atomic_read(&jl->j_commit_left) <= 0) {
1403 goto flush_older_and_return;
1404 }
1405
1406
1407
1408
1409
1410 if (atomic_read(&journal->j_wcount) != 0) {
1411 reiserfs_panic(s, "journal-844", "journal list is flushing, "
1412 "wcount is not 0");
1413 }
1414 cn = jl->j_realblock;
1415 while (cn) {
1416 was_jwait = 0;
1417 was_dirty = 0;
1418 saved_bh = NULL;
1419
1420 if (cn->blocknr == 0) {
1421 goto free_cnode;
1422 }
1423
1424
1425
1426
1427
1428 if (!(jl->j_state & LIST_DIRTY))
1429 goto free_cnode;
1430
1431 pjl = find_newer_jl_for_cn(cn);
1432
1433
1434
1435
1436
1437 if (!pjl && cn->bh) {
1438 saved_bh = cn->bh;
1439
1440
1441
1442
1443
1444 get_bh(saved_bh);
1445
1446 if (buffer_journal_dirty(saved_bh)) {
1447 BUG_ON(!can_dirty(cn));
1448 was_jwait = 1;
1449 was_dirty = 1;
1450 } else if (can_dirty(cn)) {
1451
1452
1453
1454
1455 BUG();
1456 }
1457 }
1458
1459
1460
1461
1462
1463 if (pjl) {
1464 if (atomic_read(&pjl->j_commit_left))
1465 flush_commit_list(s, pjl, 1);
1466 goto free_cnode;
1467 }
1468
1469
1470
1471
1472
1473 if (saved_bh == NULL) {
1474 goto free_cnode;
1475 }
1476
1477
1478
1479
1480
1481
1482 if ((!was_jwait) && !buffer_locked(saved_bh)) {
1483 reiserfs_warning(s, "journal-813",
1484 "BAD! buffer %llu %cdirty %cjwait, "
1485 "not in a newer transaction",
1486 (unsigned long long)saved_bh->
1487 b_blocknr, was_dirty ? ' ' : '!',
1488 was_jwait ? ' ' : '!');
1489 }
1490 if (was_dirty) {
1491
1492
1493
1494
1495 get_bh(saved_bh);
1496 set_bit(BLOCK_NEEDS_FLUSH, &cn->state);
1497 lock_buffer(saved_bh);
1498 BUG_ON(cn->blocknr != saved_bh->b_blocknr);
1499 if (buffer_dirty(saved_bh))
1500 submit_logged_buffer(saved_bh);
1501 else
1502 unlock_buffer(saved_bh);
1503 count++;
1504 } else {
1505 reiserfs_warning(s, "clm-2082",
1506 "Unable to flush buffer %llu in %s",
1507 (unsigned long long)saved_bh->
1508 b_blocknr, __func__);
1509 }
1510free_cnode:
1511 last = cn;
1512 cn = cn->next;
1513 if (saved_bh) {
1514
1515
1516
1517
1518 put_bh(saved_bh);
1519 if (atomic_read(&saved_bh->b_count) < 0) {
1520 reiserfs_warning(s, "journal-945",
1521 "saved_bh->b_count < 0");
1522 }
1523 }
1524 }
1525 if (count > 0) {
1526 cn = jl->j_realblock;
1527 while (cn) {
1528 if (test_bit(BLOCK_NEEDS_FLUSH, &cn->state)) {
1529 if (!cn->bh) {
1530 reiserfs_panic(s, "journal-1011",
1531 "cn->bh is NULL");
1532 }
1533
1534 depth = reiserfs_write_unlock_nested(s);
1535 __wait_on_buffer(cn->bh);
1536 reiserfs_write_lock_nested(s, depth);
1537
1538 if (!cn->bh) {
1539 reiserfs_panic(s, "journal-1012",
1540 "cn->bh is NULL");
1541 }
1542 if (unlikely(!buffer_uptodate(cn->bh))) {
1543#ifdef CONFIG_REISERFS_CHECK
1544 reiserfs_warning(s, "journal-949",
1545 "buffer write failed");
1546#endif
1547 err = -EIO;
1548 }
1549
1550
1551
1552
1553
1554 BUG_ON(!test_clear_buffer_journal_dirty
1555 (cn->bh));
1556
1557
1558 put_bh(cn->bh);
1559
1560 release_buffer_page(cn->bh);
1561 }
1562 cn = cn->next;
1563 }
1564 }
1565
1566 if (err)
1567 reiserfs_abort(s, -EIO,
1568 "Write error while pushing transaction to disk in %s",
1569 __func__);
1570flush_older_and_return:
1571
1572
1573
1574
1575
1576
1577
1578 if (flushall) {
1579 flush_older_journal_lists(s, jl);
1580 }
1581
1582 err = journal->j_errno;
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592 if (!err && flushall) {
1593 err =
1594 update_journal_header_block(s,
1595 (jl->j_start + jl->j_len +
1596 2) % SB_ONDISK_JOURNAL_SIZE(s),
1597 jl->j_trans_id);
1598 if (err)
1599 reiserfs_abort(s, -EIO,
1600 "Write error while updating journal header in %s",
1601 __func__);
1602 }
1603 remove_all_from_journal_list(s, jl, 0);
1604 list_del_init(&jl->j_list);
1605 journal->j_num_lists--;
1606 del_from_work_list(s, jl);
1607
1608 if (journal->j_last_flush_id != 0 &&
1609 (jl->j_trans_id - journal->j_last_flush_id) != 1) {
1610 reiserfs_warning(s, "clm-2201", "last flush %lu, current %lu",
1611 journal->j_last_flush_id, jl->j_trans_id);
1612 }
1613 journal->j_last_flush_id = jl->j_trans_id;
1614
1615
1616
1617
1618
1619 jl->j_len = 0;
1620 atomic_set(&jl->j_nonzerolen, 0);
1621 jl->j_start = 0;
1622 jl->j_realblock = NULL;
1623 jl->j_commit_bh = NULL;
1624 jl->j_trans_id = 0;
1625 jl->j_state = 0;
1626 put_journal_list(s, jl);
1627 if (flushall)
1628 mutex_unlock(&journal->j_flush_mutex);
1629 return err;
1630}
1631
1632static int write_one_transaction(struct super_block *s,
1633 struct reiserfs_journal_list *jl,
1634 struct buffer_chunk *chunk)
1635{
1636 struct reiserfs_journal_cnode *cn;
1637 int ret = 0;
1638
1639 jl->j_state |= LIST_TOUCHED;
1640 del_from_work_list(s, jl);
1641 if (jl->j_len == 0 || atomic_read(&jl->j_nonzerolen) == 0) {
1642 return 0;
1643 }
1644
1645 cn = jl->j_realblock;
1646 while (cn) {
1647
1648
1649
1650
1651 if (cn->blocknr == 0) {
1652 goto next;
1653 }
1654 if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
1655 struct buffer_head *tmp_bh;
1656
1657
1658
1659
1660
1661 tmp_bh = cn->bh;
1662 get_bh(tmp_bh);
1663 lock_buffer(tmp_bh);
1664 if (cn->bh && can_dirty(cn) && buffer_dirty(tmp_bh)) {
1665 if (!buffer_journal_dirty(tmp_bh) ||
1666 buffer_journal_prepared(tmp_bh))
1667 BUG();
1668 add_to_chunk(chunk, tmp_bh, NULL, write_chunk);
1669 ret++;
1670 } else {
1671
1672 unlock_buffer(tmp_bh);
1673 }
1674 put_bh(tmp_bh);
1675 }
1676next:
1677 cn = cn->next;
1678 cond_resched();
1679 }
1680 return ret;
1681}
1682
1683
1684static int dirty_one_transaction(struct super_block *s,
1685 struct reiserfs_journal_list *jl)
1686{
1687 struct reiserfs_journal_cnode *cn;
1688 struct reiserfs_journal_list *pjl;
1689 int ret = 0;
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 return ret;
1719}
1720
1721static int kupdate_transactions(struct super_block *s,
1722 struct reiserfs_journal_list *jl,
1723 struct reiserfs_journal_list **next_jl,
1724 unsigned int *next_trans_id,
1725 int num_blocks, int num_trans)
1726{
1727 int ret = 0;
1728 int written = 0;
1729 int transactions_flushed = 0;
1730 unsigned int orig_trans_id = jl->j_trans_id;
1731 struct buffer_chunk chunk;
1732 struct list_head *entry;
1733 struct reiserfs_journal *journal = SB_JOURNAL(s);
1734 chunk.nr = 0;
1735
1736 reiserfs_mutex_lock_safe(&journal->j_flush_mutex, s);
1737 if (!journal_list_still_alive(s, orig_trans_id)) {
1738 goto done;
1739 }
1740
1741
1742
1743
1744
1745 while ((num_trans && transactions_flushed < num_trans) ||
1746 (!num_trans && written < num_blocks)) {
1747
1748 if (jl->j_len == 0 || (jl->j_state & LIST_TOUCHED) ||
1749 atomic_read(&jl->j_commit_left)
1750 || !(jl->j_state & LIST_DIRTY)) {
1751 del_from_work_list(s, jl);
1752 break;
1753 }
1754 ret = write_one_transaction(s, jl, &chunk);
1755
1756 if (ret < 0)
1757 goto done;
1758 transactions_flushed++;
1759 written += ret;
1760 entry = jl->j_list.next;
1761
1762
1763 if (entry == &journal->j_journal_list) {
1764 break;
1765 }
1766 jl = JOURNAL_LIST_ENTRY(entry);
1767
1768
1769 if (jl->j_trans_id <= orig_trans_id)
1770 break;
1771 }
1772 if (chunk.nr) {
1773 write_chunk(&chunk);
1774 }
1775
1776done:
1777 mutex_unlock(&journal->j_flush_mutex);
1778 return ret;
1779}
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791static int flush_used_journal_lists(struct super_block *s,
1792 struct reiserfs_journal_list *jl)
1793{
1794 unsigned long len = 0;
1795 unsigned long cur_len;
1796 int ret;
1797 int i;
1798 int limit = 256;
1799 struct reiserfs_journal_list *tjl;
1800 struct reiserfs_journal_list *flush_jl;
1801 unsigned int trans_id;
1802 struct reiserfs_journal *journal = SB_JOURNAL(s);
1803
1804 flush_jl = tjl = jl;
1805
1806
1807 if (reiserfs_data_log(s))
1808 limit = 1024;
1809
1810 for (i = 0; i < 256 && len < limit; i++) {
1811 if (atomic_read(&tjl->j_commit_left) ||
1812 tjl->j_trans_id < jl->j_trans_id) {
1813 break;
1814 }
1815 cur_len = atomic_read(&tjl->j_nonzerolen);
1816 if (cur_len > 0) {
1817 tjl->j_state &= ~LIST_TOUCHED;
1818 }
1819 len += cur_len;
1820 flush_jl = tjl;
1821 if (tjl->j_list.next == &journal->j_journal_list)
1822 break;
1823 tjl = JOURNAL_LIST_ENTRY(tjl->j_list.next);
1824 }
1825 get_journal_list(jl);
1826 get_journal_list(flush_jl);
1827
1828
1829
1830
1831
1832
1833 if (flush_jl != jl) {
1834 ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
1835 }
1836 flush_journal_list(s, flush_jl, 1);
1837 put_journal_list(s, flush_jl);
1838 put_journal_list(s, jl);
1839 return 0;
1840}
1841
1842
1843
1844
1845
1846void remove_journal_hash(struct super_block *sb,
1847 struct reiserfs_journal_cnode **table,
1848 struct reiserfs_journal_list *jl,
1849 unsigned long block, int remove_freed)
1850{
1851 struct reiserfs_journal_cnode *cur;
1852 struct reiserfs_journal_cnode **head;
1853
1854 head = &(journal_hash(table, sb, block));
1855 if (!head) {
1856 return;
1857 }
1858 cur = *head;
1859 while (cur) {
1860 if (cur->blocknr == block && cur->sb == sb
1861 && (jl == NULL || jl == cur->jlist)
1862 && (!test_bit(BLOCK_FREED, &cur->state) || remove_freed)) {
1863 if (cur->hnext) {
1864 cur->hnext->hprev = cur->hprev;
1865 }
1866 if (cur->hprev) {
1867 cur->hprev->hnext = cur->hnext;
1868 } else {
1869 *head = cur->hnext;
1870 }
1871 cur->blocknr = 0;
1872 cur->sb = NULL;
1873 cur->state = 0;
1874
1875
1876
1877
1878 if (cur->bh && cur->jlist)
1879 atomic_dec(&cur->jlist->j_nonzerolen);
1880 cur->bh = NULL;
1881 cur->jlist = NULL;
1882 }
1883 cur = cur->hnext;
1884 }
1885}
1886
1887static void free_journal_ram(struct super_block *sb)
1888{
1889 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1890 kfree(journal->j_current_jl);
1891 journal->j_num_lists--;
1892
1893 vfree(journal->j_cnode_free_orig);
1894 free_list_bitmaps(sb, journal->j_list_bitmap);
1895 free_bitmap_nodes(sb);
1896 if (journal->j_header_bh) {
1897 brelse(journal->j_header_bh);
1898 }
1899
1900
1901
1902
1903 release_journal_dev(sb, journal);
1904 vfree(journal);
1905}
1906
1907
1908
1909
1910
1911static int do_journal_release(struct reiserfs_transaction_handle *th,
1912 struct super_block *sb, int error)
1913{
1914 struct reiserfs_transaction_handle myth;
1915 int flushed = 0;
1916 struct reiserfs_journal *journal = SB_JOURNAL(sb);
1917
1918
1919
1920
1921
1922 if (!error && !sb_rdonly(sb)) {
1923
1924 BUG_ON(!th->t_trans_id);
1925 do_journal_end(th, FLUSH_ALL);
1926
1927
1928
1929
1930
1931 if (!journal_join(&myth, sb)) {
1932 reiserfs_prepare_for_journal(sb,
1933 SB_BUFFER_WITH_SB(sb),
1934 1);
1935 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1936 do_journal_end(&myth, FLUSH_ALL);
1937 flushed = 1;
1938 }
1939 }
1940
1941
1942 if (!error && reiserfs_is_journal_aborted(journal)) {
1943 memset(&myth, 0, sizeof(myth));
1944 if (!journal_join_abort(&myth, sb)) {
1945 reiserfs_prepare_for_journal(sb,
1946 SB_BUFFER_WITH_SB(sb),
1947 1);
1948 journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
1949 do_journal_end(&myth, FLUSH_ALL);
1950 }
1951 }
1952
1953
1954
1955
1956
1957
1958 reiserfs_write_unlock(sb);
1959
1960
1961
1962
1963
1964
1965 reiserfs_cancel_old_flush(sb);
1966
1967 cancel_delayed_work_sync(&SB_JOURNAL(sb)->j_work);
1968
1969 free_journal_ram(sb);
1970
1971 reiserfs_write_lock(sb);
1972
1973 return 0;
1974}
1975
1976
1977int journal_release(struct reiserfs_transaction_handle *th,
1978 struct super_block *sb)
1979{
1980 return do_journal_release(th, sb, 0);
1981}
1982
1983
1984int journal_release_error(struct reiserfs_transaction_handle *th,
1985 struct super_block *sb)
1986{
1987 return do_journal_release(th, sb, 1);
1988}
1989
1990
1991
1992
1993
1994static int journal_compare_desc_commit(struct super_block *sb,
1995 struct reiserfs_journal_desc *desc,
1996 struct reiserfs_journal_commit *commit)
1997{
1998 if (get_commit_trans_id(commit) != get_desc_trans_id(desc) ||
1999 get_commit_trans_len(commit) != get_desc_trans_len(desc) ||
2000 get_commit_trans_len(commit) > SB_JOURNAL(sb)->j_trans_max ||
2001 get_commit_trans_len(commit) <= 0) {
2002 return 1;
2003 }
2004 return 0;
2005}
2006
2007
2008
2009
2010
2011
2012
2013static int journal_transaction_is_valid(struct super_block *sb,
2014 struct buffer_head *d_bh,
2015 unsigned int *oldest_invalid_trans_id,
2016 unsigned long *newest_mount_id)
2017{
2018 struct reiserfs_journal_desc *desc;
2019 struct reiserfs_journal_commit *commit;
2020 struct buffer_head *c_bh;
2021 unsigned long offset;
2022
2023 if (!d_bh)
2024 return 0;
2025
2026 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2027 if (get_desc_trans_len(desc) > 0
2028 && !memcmp(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8)) {
2029 if (oldest_invalid_trans_id && *oldest_invalid_trans_id
2030 && get_desc_trans_id(desc) > *oldest_invalid_trans_id) {
2031 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2032 "journal-986: transaction "
2033 "is valid returning because trans_id %d is greater than "
2034 "oldest_invalid %lu",
2035 get_desc_trans_id(desc),
2036 *oldest_invalid_trans_id);
2037 return 0;
2038 }
2039 if (newest_mount_id
2040 && *newest_mount_id > get_desc_mount_id(desc)) {
2041 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2042 "journal-1087: transaction "
2043 "is valid returning because mount_id %d is less than "
2044 "newest_mount_id %lu",
2045 get_desc_mount_id(desc),
2046 *newest_mount_id);
2047 return -1;
2048 }
2049 if (get_desc_trans_len(desc) > SB_JOURNAL(sb)->j_trans_max) {
2050 reiserfs_warning(sb, "journal-2018",
2051 "Bad transaction length %d "
2052 "encountered, ignoring transaction",
2053 get_desc_trans_len(desc));
2054 return -1;
2055 }
2056 offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2057
2058
2059
2060
2061
2062 c_bh =
2063 journal_bread(sb,
2064 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2065 ((offset + get_desc_trans_len(desc) +
2066 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
2067 if (!c_bh)
2068 return 0;
2069 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2070 if (journal_compare_desc_commit(sb, desc, commit)) {
2071 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2072 "journal_transaction_is_valid, commit offset %ld had bad "
2073 "time %d or length %d",
2074 c_bh->b_blocknr -
2075 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2076 get_commit_trans_id(commit),
2077 get_commit_trans_len(commit));
2078 brelse(c_bh);
2079 if (oldest_invalid_trans_id) {
2080 *oldest_invalid_trans_id =
2081 get_desc_trans_id(desc);
2082 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2083 "journal-1004: "
2084 "transaction_is_valid setting oldest invalid trans_id "
2085 "to %d",
2086 get_desc_trans_id(desc));
2087 }
2088 return -1;
2089 }
2090 brelse(c_bh);
2091 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2092 "journal-1006: found valid "
2093 "transaction start offset %llu, len %d id %d",
2094 d_bh->b_blocknr -
2095 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2096 get_desc_trans_len(desc),
2097 get_desc_trans_id(desc));
2098 return 1;
2099 } else {
2100 return 0;
2101 }
2102}
2103
2104static void brelse_array(struct buffer_head **heads, int num)
2105{
2106 int i;
2107 for (i = 0; i < num; i++) {
2108 brelse(heads[i]);
2109 }
2110}
2111
2112
2113
2114
2115
2116
2117
2118static int journal_read_transaction(struct super_block *sb,
2119 unsigned long cur_dblock,
2120 unsigned long oldest_start,
2121 unsigned int oldest_trans_id,
2122 unsigned long newest_mount_id)
2123{
2124 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2125 struct reiserfs_journal_desc *desc;
2126 struct reiserfs_journal_commit *commit;
2127 unsigned int trans_id = 0;
2128 struct buffer_head *c_bh;
2129 struct buffer_head *d_bh;
2130 struct buffer_head **log_blocks = NULL;
2131 struct buffer_head **real_blocks = NULL;
2132 unsigned int trans_offset;
2133 int i;
2134 int trans_half;
2135
2136 d_bh = journal_bread(sb, cur_dblock);
2137 if (!d_bh)
2138 return 1;
2139 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2140 trans_offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2141 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1037: "
2142 "journal_read_transaction, offset %llu, len %d mount_id %d",
2143 d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2144 get_desc_trans_len(desc), get_desc_mount_id(desc));
2145 if (get_desc_trans_id(desc) < oldest_trans_id) {
2146 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1039: "
2147 "journal_read_trans skipping because %lu is too old",
2148 cur_dblock -
2149 SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2150 brelse(d_bh);
2151 return 1;
2152 }
2153 if (get_desc_mount_id(desc) != newest_mount_id) {
2154 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1146: "
2155 "journal_read_trans skipping because %d is != "
2156 "newest_mount_id %lu", get_desc_mount_id(desc),
2157 newest_mount_id);
2158 brelse(d_bh);
2159 return 1;
2160 }
2161 c_bh = journal_bread(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2162 ((trans_offset + get_desc_trans_len(desc) + 1) %
2163 SB_ONDISK_JOURNAL_SIZE(sb)));
2164 if (!c_bh) {
2165 brelse(d_bh);
2166 return 1;
2167 }
2168 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
2169 if (journal_compare_desc_commit(sb, desc, commit)) {
2170 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2171 "journal_read_transaction, "
2172 "commit offset %llu had bad time %d or length %d",
2173 c_bh->b_blocknr -
2174 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2175 get_commit_trans_id(commit),
2176 get_commit_trans_len(commit));
2177 brelse(c_bh);
2178 brelse(d_bh);
2179 return 1;
2180 }
2181
2182 if (bdev_read_only(sb->s_bdev)) {
2183 reiserfs_warning(sb, "clm-2076",
2184 "device is readonly, unable to replay log");
2185 brelse(c_bh);
2186 brelse(d_bh);
2187 return -EROFS;
2188 }
2189
2190 trans_id = get_desc_trans_id(desc);
2191
2192
2193
2194
2195 log_blocks = kmalloc(get_desc_trans_len(desc) *
2196 sizeof(struct buffer_head *), GFP_NOFS);
2197 real_blocks = kmalloc(get_desc_trans_len(desc) *
2198 sizeof(struct buffer_head *), GFP_NOFS);
2199 if (!log_blocks || !real_blocks) {
2200 brelse(c_bh);
2201 brelse(d_bh);
2202 kfree(log_blocks);
2203 kfree(real_blocks);
2204 reiserfs_warning(sb, "journal-1169",
2205 "kmalloc failed, unable to mount FS");
2206 return -1;
2207 }
2208
2209 trans_half = journal_trans_half(sb->s_blocksize);
2210 for (i = 0; i < get_desc_trans_len(desc); i++) {
2211 log_blocks[i] =
2212 journal_getblk(sb,
2213 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2214 (trans_offset + 1 +
2215 i) % SB_ONDISK_JOURNAL_SIZE(sb));
2216 if (i < trans_half) {
2217 real_blocks[i] =
2218 sb_getblk(sb,
2219 le32_to_cpu(desc->j_realblock[i]));
2220 } else {
2221 real_blocks[i] =
2222 sb_getblk(sb,
2223 le32_to_cpu(commit->
2224 j_realblock[i - trans_half]));
2225 }
2226 if (real_blocks[i]->b_blocknr > SB_BLOCK_COUNT(sb)) {
2227 reiserfs_warning(sb, "journal-1207",
2228 "REPLAY FAILURE fsck required! "
2229 "Block to replay is outside of "
2230 "filesystem");
2231 goto abort_replay;
2232 }
2233
2234 if (is_block_in_log_or_reserved_area
2235 (sb, real_blocks[i]->b_blocknr)) {
2236 reiserfs_warning(sb, "journal-1204",
2237 "REPLAY FAILURE fsck required! "
2238 "Trying to replay onto a log block");
2239abort_replay:
2240 brelse_array(log_blocks, i);
2241 brelse_array(real_blocks, i);
2242 brelse(c_bh);
2243 brelse(d_bh);
2244 kfree(log_blocks);
2245 kfree(real_blocks);
2246 return -1;
2247 }
2248 }
2249
2250 ll_rw_block(REQ_OP_READ, 0, get_desc_trans_len(desc), log_blocks);
2251 for (i = 0; i < get_desc_trans_len(desc); i++) {
2252
2253 wait_on_buffer(log_blocks[i]);
2254 if (!buffer_uptodate(log_blocks[i])) {
2255 reiserfs_warning(sb, "journal-1212",
2256 "REPLAY FAILURE fsck required! "
2257 "buffer write failed");
2258 brelse_array(log_blocks + i,
2259 get_desc_trans_len(desc) - i);
2260 brelse_array(real_blocks, get_desc_trans_len(desc));
2261 brelse(c_bh);
2262 brelse(d_bh);
2263 kfree(log_blocks);
2264 kfree(real_blocks);
2265 return -1;
2266 }
2267 memcpy(real_blocks[i]->b_data, log_blocks[i]->b_data,
2268 real_blocks[i]->b_size);
2269 set_buffer_uptodate(real_blocks[i]);
2270 brelse(log_blocks[i]);
2271 }
2272
2273 for (i = 0; i < get_desc_trans_len(desc); i++) {
2274 set_buffer_dirty(real_blocks[i]);
2275 write_dirty_buffer(real_blocks[i], 0);
2276 }
2277 for (i = 0; i < get_desc_trans_len(desc); i++) {
2278 wait_on_buffer(real_blocks[i]);
2279 if (!buffer_uptodate(real_blocks[i])) {
2280 reiserfs_warning(sb, "journal-1226",
2281 "REPLAY FAILURE, fsck required! "
2282 "buffer write failed");
2283 brelse_array(real_blocks + i,
2284 get_desc_trans_len(desc) - i);
2285 brelse(c_bh);
2286 brelse(d_bh);
2287 kfree(log_blocks);
2288 kfree(real_blocks);
2289 return -1;
2290 }
2291 brelse(real_blocks[i]);
2292 }
2293 cur_dblock =
2294 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2295 ((trans_offset + get_desc_trans_len(desc) +
2296 2) % SB_ONDISK_JOURNAL_SIZE(sb));
2297 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2298 "journal-1095: setting journal " "start to offset %ld",
2299 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb));
2300
2301
2302
2303
2304
2305 journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2306 journal->j_last_flush_trans_id = trans_id;
2307 journal->j_trans_id = trans_id + 1;
2308
2309 if (journal->j_trans_id == 0)
2310 journal->j_trans_id = 10;
2311 brelse(c_bh);
2312 brelse(d_bh);
2313 kfree(log_blocks);
2314 kfree(real_blocks);
2315 return 0;
2316}
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326static struct buffer_head *reiserfs_breada(struct block_device *dev,
2327 b_blocknr_t block, int bufsize,
2328 b_blocknr_t max_block)
2329{
2330 struct buffer_head *bhlist[BUFNR];
2331 unsigned int blocks = BUFNR;
2332 struct buffer_head *bh;
2333 int i, j;
2334
2335 bh = __getblk(dev, block, bufsize);
2336 if (buffer_uptodate(bh))
2337 return (bh);
2338
2339 if (block + BUFNR > max_block) {
2340 blocks = max_block - block;
2341 }
2342 bhlist[0] = bh;
2343 j = 1;
2344 for (i = 1; i < blocks; i++) {
2345 bh = __getblk(dev, block + i, bufsize);
2346 if (buffer_uptodate(bh)) {
2347 brelse(bh);
2348 break;
2349 } else
2350 bhlist[j++] = bh;
2351 }
2352 ll_rw_block(REQ_OP_READ, 0, j, bhlist);
2353 for (i = 1; i < j; i++)
2354 brelse(bhlist[i]);
2355 bh = bhlist[0];
2356 wait_on_buffer(bh);
2357 if (buffer_uptodate(bh))
2358 return bh;
2359 brelse(bh);
2360 return NULL;
2361}
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375static int journal_read(struct super_block *sb)
2376{
2377 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2378 struct reiserfs_journal_desc *desc;
2379 unsigned int oldest_trans_id = 0;
2380 unsigned int oldest_invalid_trans_id = 0;
2381 time_t start;
2382 unsigned long oldest_start = 0;
2383 unsigned long cur_dblock = 0;
2384 unsigned long newest_mount_id = 9;
2385 struct buffer_head *d_bh;
2386 struct reiserfs_journal_header *jh;
2387 int valid_journal_header = 0;
2388 int replay_count = 0;
2389 int continue_replay = 1;
2390 int ret;
2391
2392 cur_dblock = SB_ONDISK_JOURNAL_1st_BLOCK(sb);
2393 reiserfs_info(sb, "checking transaction log (%pg)\n",
2394 journal->j_dev_bd);
2395 start = get_seconds();
2396
2397
2398
2399
2400
2401
2402 journal->j_header_bh = journal_bread(sb,
2403 SB_ONDISK_JOURNAL_1st_BLOCK(sb)
2404 + SB_ONDISK_JOURNAL_SIZE(sb));
2405 if (!journal->j_header_bh) {
2406 return 1;
2407 }
2408 jh = (struct reiserfs_journal_header *)(journal->j_header_bh->b_data);
2409 if (le32_to_cpu(jh->j_first_unflushed_offset) <
2410 SB_ONDISK_JOURNAL_SIZE(sb)
2411 && le32_to_cpu(jh->j_last_flush_trans_id) > 0) {
2412 oldest_start =
2413 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2414 le32_to_cpu(jh->j_first_unflushed_offset);
2415 oldest_trans_id = le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2416 newest_mount_id = le32_to_cpu(jh->j_mount_id);
2417 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2418 "journal-1153: found in "
2419 "header: first_unflushed_offset %d, last_flushed_trans_id "
2420 "%lu", le32_to_cpu(jh->j_first_unflushed_offset),
2421 le32_to_cpu(jh->j_last_flush_trans_id));
2422 valid_journal_header = 1;
2423
2424
2425
2426
2427
2428
2429 d_bh =
2430 journal_bread(sb,
2431 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2432 le32_to_cpu(jh->j_first_unflushed_offset));
2433 ret = journal_transaction_is_valid(sb, d_bh, NULL, NULL);
2434 if (!ret) {
2435 continue_replay = 0;
2436 }
2437 brelse(d_bh);
2438 goto start_log_replay;
2439 }
2440
2441
2442
2443
2444
2445
2446 while (continue_replay
2447 && cur_dblock <
2448 (SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2449 SB_ONDISK_JOURNAL_SIZE(sb))) {
2450
2451
2452
2453
2454 d_bh =
2455 reiserfs_breada(journal->j_dev_bd, cur_dblock,
2456 sb->s_blocksize,
2457 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2458 SB_ONDISK_JOURNAL_SIZE(sb));
2459 ret =
2460 journal_transaction_is_valid(sb, d_bh,
2461 &oldest_invalid_trans_id,
2462 &newest_mount_id);
2463 if (ret == 1) {
2464 desc = (struct reiserfs_journal_desc *)d_bh->b_data;
2465 if (oldest_start == 0) {
2466 oldest_trans_id = get_desc_trans_id(desc);
2467 oldest_start = d_bh->b_blocknr;
2468 newest_mount_id = get_desc_mount_id(desc);
2469 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2470 "journal-1179: Setting "
2471 "oldest_start to offset %llu, trans_id %lu",
2472 oldest_start -
2473 SB_ONDISK_JOURNAL_1st_BLOCK
2474 (sb), oldest_trans_id);
2475 } else if (oldest_trans_id > get_desc_trans_id(desc)) {
2476
2477 oldest_trans_id = get_desc_trans_id(desc);
2478 oldest_start = d_bh->b_blocknr;
2479 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2480 "journal-1180: Resetting "
2481 "oldest_start to offset %lu, trans_id %lu",
2482 oldest_start -
2483 SB_ONDISK_JOURNAL_1st_BLOCK
2484 (sb), oldest_trans_id);
2485 }
2486 if (newest_mount_id < get_desc_mount_id(desc)) {
2487 newest_mount_id = get_desc_mount_id(desc);
2488 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2489 "journal-1299: Setting "
2490 "newest_mount_id to %d",
2491 get_desc_mount_id(desc));
2492 }
2493 cur_dblock += get_desc_trans_len(desc) + 2;
2494 } else {
2495 cur_dblock++;
2496 }
2497 brelse(d_bh);
2498 }
2499
2500start_log_replay:
2501 cur_dblock = oldest_start;
2502 if (oldest_trans_id) {
2503 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2504 "journal-1206: Starting replay "
2505 "from offset %llu, trans_id %lu",
2506 cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2507 oldest_trans_id);
2508
2509 }
2510 replay_count = 0;
2511 while (continue_replay && oldest_trans_id > 0) {
2512 ret =
2513 journal_read_transaction(sb, cur_dblock, oldest_start,
2514 oldest_trans_id, newest_mount_id);
2515 if (ret < 0) {
2516 return ret;
2517 } else if (ret != 0) {
2518 break;
2519 }
2520 cur_dblock =
2521 SB_ONDISK_JOURNAL_1st_BLOCK(sb) + journal->j_start;
2522 replay_count++;
2523 if (cur_dblock == oldest_start)
2524 break;
2525 }
2526
2527 if (oldest_trans_id == 0) {
2528 reiserfs_debug(sb, REISERFS_DEBUG_CODE,
2529 "journal-1225: No valid " "transactions found");
2530 }
2531
2532
2533
2534
2535
2536
2537 if (valid_journal_header && replay_count == 0) {
2538 journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset);
2539 journal->j_trans_id =
2540 le32_to_cpu(jh->j_last_flush_trans_id) + 1;
2541
2542 if (journal->j_trans_id == 0)
2543 journal->j_trans_id = 10;
2544 journal->j_last_flush_trans_id =
2545 le32_to_cpu(jh->j_last_flush_trans_id);
2546 journal->j_mount_id = le32_to_cpu(jh->j_mount_id) + 1;
2547 } else {
2548 journal->j_mount_id = newest_mount_id + 1;
2549 }
2550 reiserfs_debug(sb, REISERFS_DEBUG_CODE, "journal-1299: Setting "
2551 "newest_mount_id to %lu", journal->j_mount_id);
2552 journal->j_first_unflushed_offset = journal->j_start;
2553 if (replay_count > 0) {
2554 reiserfs_info(sb,
2555 "replayed %d transactions in %lu seconds\n",
2556 replay_count, get_seconds() - start);
2557 }
2558
2559 reiserfs_write_lock(sb);
2560 if (!bdev_read_only(sb->s_bdev) &&
2561 _update_journal_header_block(sb, journal->j_start,
2562 journal->j_last_flush_trans_id)) {
2563 reiserfs_write_unlock(sb);
2564
2565
2566
2567
2568 return -1;
2569 }
2570 reiserfs_write_unlock(sb);
2571 return 0;
2572}
2573
2574static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
2575{
2576 struct reiserfs_journal_list *jl;
2577 jl = kzalloc(sizeof(struct reiserfs_journal_list),
2578 GFP_NOFS | __GFP_NOFAIL);
2579 INIT_LIST_HEAD(&jl->j_list);
2580 INIT_LIST_HEAD(&jl->j_working_list);
2581 INIT_LIST_HEAD(&jl->j_tail_bh_list);
2582 INIT_LIST_HEAD(&jl->j_bh_list);
2583 mutex_init(&jl->j_commit_mutex);
2584 SB_JOURNAL(s)->j_num_lists++;
2585 get_journal_list(jl);
2586 return jl;
2587}
2588
2589static void journal_list_init(struct super_block *sb)
2590{
2591 SB_JOURNAL(sb)->j_current_jl = alloc_journal_list(sb);
2592}
2593
2594static void release_journal_dev(struct super_block *super,
2595 struct reiserfs_journal *journal)
2596{
2597 if (journal->j_dev_bd != NULL) {
2598 blkdev_put(journal->j_dev_bd, journal->j_dev_mode);
2599 journal->j_dev_bd = NULL;
2600 }
2601}
2602
2603static int journal_init_dev(struct super_block *super,
2604 struct reiserfs_journal *journal,
2605 const char *jdev_name)
2606{
2607 int result;
2608 dev_t jdev;
2609 fmode_t blkdev_mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
2610 char b[BDEVNAME_SIZE];
2611
2612 result = 0;
2613
2614 journal->j_dev_bd = NULL;
2615 jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
2616 new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
2617
2618 if (bdev_read_only(super->s_bdev))
2619 blkdev_mode = FMODE_READ;
2620
2621
2622 if ((!jdev_name || !jdev_name[0])) {
2623 if (jdev == super->s_dev)
2624 blkdev_mode &= ~FMODE_EXCL;
2625 journal->j_dev_bd = blkdev_get_by_dev(jdev, blkdev_mode,
2626 journal);
2627 journal->j_dev_mode = blkdev_mode;
2628 if (IS_ERR(journal->j_dev_bd)) {
2629 result = PTR_ERR(journal->j_dev_bd);
2630 journal->j_dev_bd = NULL;
2631 reiserfs_warning(super, "sh-458",
2632 "cannot init journal device '%s': %i",
2633 __bdevname(jdev, b), result);
2634 return result;
2635 } else if (jdev != super->s_dev)
2636 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2637
2638 return 0;
2639 }
2640
2641 journal->j_dev_mode = blkdev_mode;
2642 journal->j_dev_bd = blkdev_get_by_path(jdev_name, blkdev_mode, journal);
2643 if (IS_ERR(journal->j_dev_bd)) {
2644 result = PTR_ERR(journal->j_dev_bd);
2645 journal->j_dev_bd = NULL;
2646 reiserfs_warning(super,
2647 "journal_init_dev: Cannot open '%s': %i",
2648 jdev_name, result);
2649 return result;
2650 }
2651
2652 set_blocksize(journal->j_dev_bd, super->s_blocksize);
2653 reiserfs_info(super,
2654 "journal_init_dev: journal device: %pg\n",
2655 journal->j_dev_bd);
2656 return 0;
2657}
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671#define REISERFS_STANDARD_BLKSIZE (4096)
2672
2673static int check_advise_trans_params(struct super_block *sb,
2674 struct reiserfs_journal *journal)
2675{
2676 if (journal->j_trans_max) {
2677
2678 int ratio = 1;
2679 if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE)
2680 ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize;
2681
2682 if (journal->j_trans_max > JOURNAL_TRANS_MAX_DEFAULT / ratio ||
2683 journal->j_trans_max < JOURNAL_TRANS_MIN_DEFAULT / ratio ||
2684 SB_ONDISK_JOURNAL_SIZE(sb) / journal->j_trans_max <
2685 JOURNAL_MIN_RATIO) {
2686 reiserfs_warning(sb, "sh-462",
2687 "bad transaction max size (%u). "
2688 "FSCK?", journal->j_trans_max);
2689 return 1;
2690 }
2691 if (journal->j_max_batch != (journal->j_trans_max) *
2692 JOURNAL_MAX_BATCH_DEFAULT/JOURNAL_TRANS_MAX_DEFAULT) {
2693 reiserfs_warning(sb, "sh-463",
2694 "bad transaction max batch (%u). "
2695 "FSCK?", journal->j_max_batch);
2696 return 1;
2697 }
2698 } else {
2699
2700
2701
2702
2703
2704
2705 if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) {
2706 reiserfs_warning(sb, "sh-464", "bad blocksize (%u)",
2707 sb->s_blocksize);
2708 return 1;
2709 }
2710 journal->j_trans_max = JOURNAL_TRANS_MAX_DEFAULT;
2711 journal->j_max_batch = JOURNAL_MAX_BATCH_DEFAULT;
2712 journal->j_max_commit_age = JOURNAL_MAX_COMMIT_AGE;
2713 }
2714 return 0;
2715}
2716
2717
2718int journal_init(struct super_block *sb, const char *j_dev_name,
2719 int old_format, unsigned int commit_max_age)
2720{
2721 int num_cnodes = SB_ONDISK_JOURNAL_SIZE(sb) * 2;
2722 struct buffer_head *bhjh;
2723 struct reiserfs_super_block *rs;
2724 struct reiserfs_journal_header *jh;
2725 struct reiserfs_journal *journal;
2726 struct reiserfs_journal_list *jl;
2727 int ret;
2728
2729 journal = SB_JOURNAL(sb) = vzalloc(sizeof(struct reiserfs_journal));
2730 if (!journal) {
2731 reiserfs_warning(sb, "journal-1256",
2732 "unable to get memory for journal structure");
2733 return 1;
2734 }
2735 INIT_LIST_HEAD(&journal->j_bitmap_nodes);
2736 INIT_LIST_HEAD(&journal->j_prealloc_list);
2737 INIT_LIST_HEAD(&journal->j_working_list);
2738 INIT_LIST_HEAD(&journal->j_journal_list);
2739 journal->j_persistent_trans = 0;
2740 if (reiserfs_allocate_list_bitmaps(sb, journal->j_list_bitmap,
2741 reiserfs_bmap_count(sb)))
2742 goto free_and_return;
2743
2744 allocate_bitmap_nodes(sb);
2745
2746
2747 SB_JOURNAL_1st_RESERVED_BLOCK(sb) = (old_format ?
2748 REISERFS_OLD_DISK_OFFSET_IN_BYTES
2749 / sb->s_blocksize +
2750 reiserfs_bmap_count(sb) +
2751 1 :
2752 REISERFS_DISK_OFFSET_IN_BYTES /
2753 sb->s_blocksize + 2);
2754
2755
2756
2757
2758
2759 if (!SB_ONDISK_JOURNAL_DEVICE(sb) &&
2760 (SB_JOURNAL_1st_RESERVED_BLOCK(sb) +
2761 SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) {
2762 reiserfs_warning(sb, "journal-1393",
2763 "journal does not fit for area addressed "
2764 "by first of bitmap blocks. It starts at "
2765 "%u and its size is %u. Block size %ld",
2766 SB_JOURNAL_1st_RESERVED_BLOCK(sb),
2767 SB_ONDISK_JOURNAL_SIZE(sb),
2768 sb->s_blocksize);
2769 goto free_and_return;
2770 }
2771
2772 if (journal_init_dev(sb, journal, j_dev_name) != 0) {
2773 reiserfs_warning(sb, "sh-462",
2774 "unable to initialize journal device");
2775 goto free_and_return;
2776 }
2777
2778 rs = SB_DISK_SUPER_BLOCK(sb);
2779
2780
2781 bhjh = journal_bread(sb,
2782 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
2783 SB_ONDISK_JOURNAL_SIZE(sb));
2784 if (!bhjh) {
2785 reiserfs_warning(sb, "sh-459",
2786 "unable to read journal header");
2787 goto free_and_return;
2788 }
2789 jh = (struct reiserfs_journal_header *)(bhjh->b_data);
2790
2791
2792 if (is_reiserfs_jr(rs)
2793 && (le32_to_cpu(jh->jh_journal.jp_journal_magic) !=
2794 sb_jp_journal_magic(rs))) {
2795 reiserfs_warning(sb, "sh-460",
2796 "journal header magic %x (device %pg) does "
2797 "not match to magic found in super block %x",
2798 jh->jh_journal.jp_journal_magic,
2799 journal->j_dev_bd,
2800 sb_jp_journal_magic(rs));
2801 brelse(bhjh);
2802 goto free_and_return;
2803 }
2804
2805 journal->j_trans_max = le32_to_cpu(jh->jh_journal.jp_journal_trans_max);
2806 journal->j_max_batch = le32_to_cpu(jh->jh_journal.jp_journal_max_batch);
2807 journal->j_max_commit_age =
2808 le32_to_cpu(jh->jh_journal.jp_journal_max_commit_age);
2809 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
2810
2811 if (check_advise_trans_params(sb, journal) != 0)
2812 goto free_and_return;
2813 journal->j_default_max_commit_age = journal->j_max_commit_age;
2814
2815 if (commit_max_age != 0) {
2816 journal->j_max_commit_age = commit_max_age;
2817 journal->j_max_trans_age = commit_max_age;
2818 }
2819
2820 reiserfs_info(sb, "journal params: device %pg, size %u, "
2821 "journal first block %u, max trans len %u, max batch %u, "
2822 "max commit age %u, max trans age %u\n",
2823 journal->j_dev_bd,
2824 SB_ONDISK_JOURNAL_SIZE(sb),
2825 SB_ONDISK_JOURNAL_1st_BLOCK(sb),
2826 journal->j_trans_max,
2827 journal->j_max_batch,
2828 journal->j_max_commit_age, journal->j_max_trans_age);
2829
2830 brelse(bhjh);
2831
2832 journal->j_list_bitmap_index = 0;
2833 journal_list_init(sb);
2834
2835 memset(journal->j_list_hash_table, 0,
2836 JOURNAL_HASH_SIZE * sizeof(struct reiserfs_journal_cnode *));
2837
2838 INIT_LIST_HEAD(&journal->j_dirty_buffers);
2839 spin_lock_init(&journal->j_dirty_buffers_lock);
2840
2841 journal->j_start = 0;
2842 journal->j_len = 0;
2843 journal->j_len_alloc = 0;
2844 atomic_set(&journal->j_wcount, 0);
2845 atomic_set(&journal->j_async_throttle, 0);
2846 journal->j_bcount = 0;
2847 journal->j_trans_start_time = 0;
2848 journal->j_last = NULL;
2849 journal->j_first = NULL;
2850 init_waitqueue_head(&journal->j_join_wait);
2851 mutex_init(&journal->j_mutex);
2852 mutex_init(&journal->j_flush_mutex);
2853
2854 journal->j_trans_id = 10;
2855 journal->j_mount_id = 10;
2856 journal->j_state = 0;
2857 atomic_set(&journal->j_jlock, 0);
2858 journal->j_cnode_free_list = allocate_cnodes(num_cnodes);
2859 journal->j_cnode_free_orig = journal->j_cnode_free_list;
2860 journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0;
2861 journal->j_cnode_used = 0;
2862 journal->j_must_wait = 0;
2863
2864 if (journal->j_cnode_free == 0) {
2865 reiserfs_warning(sb, "journal-2004", "Journal cnode memory "
2866 "allocation failed (%ld bytes). Journal is "
2867 "too large for available memory. Usually "
2868 "this is due to a journal that is too large.",
2869 sizeof (struct reiserfs_journal_cnode) * num_cnodes);
2870 goto free_and_return;
2871 }
2872
2873 init_journal_hash(sb);
2874 jl = journal->j_current_jl;
2875
2876
2877
2878
2879
2880
2881 reiserfs_write_lock(sb);
2882 jl->j_list_bitmap = get_list_bitmap(sb, jl);
2883 reiserfs_write_unlock(sb);
2884 if (!jl->j_list_bitmap) {
2885 reiserfs_warning(sb, "journal-2005",
2886 "get_list_bitmap failed for journal list 0");
2887 goto free_and_return;
2888 }
2889
2890 ret = journal_read(sb);
2891 if (ret < 0) {
2892 reiserfs_warning(sb, "reiserfs-2006",
2893 "Replay Failure, unable to mount");
2894 goto free_and_return;
2895 }
2896
2897 INIT_DELAYED_WORK(&journal->j_work, flush_async_commits);
2898 journal->j_work_sb = sb;
2899 return 0;
2900free_and_return:
2901 free_journal_ram(sb);
2902 return 1;
2903}
2904
2905
2906
2907
2908
2909
2910int journal_transaction_should_end(struct reiserfs_transaction_handle *th,
2911 int new_alloc)
2912{
2913 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2914 time_t now = get_seconds();
2915
2916 BUG_ON(!th->t_trans_id);
2917 if (th->t_refcount > 1)
2918 return 0;
2919 if (journal->j_must_wait > 0 ||
2920 (journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
2921 atomic_read(&journal->j_jlock) ||
2922 (now - journal->j_trans_start_time) > journal->j_max_trans_age ||
2923 journal->j_cnode_free < (journal->j_trans_max * 3)) {
2924 return 1;
2925 }
2926
2927 journal->j_len_alloc += new_alloc;
2928 th->t_blocks_allocated += new_alloc ;
2929 return 0;
2930}
2931
2932
2933void reiserfs_block_writes(struct reiserfs_transaction_handle *th)
2934{
2935 struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
2936 BUG_ON(!th->t_trans_id);
2937 journal->j_must_wait = 1;
2938 set_bit(J_WRITERS_BLOCKED, &journal->j_state);
2939 return;
2940}
2941
2942
2943void reiserfs_allow_writes(struct super_block *s)
2944{
2945 struct reiserfs_journal *journal = SB_JOURNAL(s);
2946 clear_bit(J_WRITERS_BLOCKED, &journal->j_state);
2947 wake_up(&journal->j_join_wait);
2948}
2949
2950
2951void reiserfs_wait_on_write_block(struct super_block *s)
2952{
2953 struct reiserfs_journal *journal = SB_JOURNAL(s);
2954 wait_event(journal->j_join_wait,
2955 !test_bit(J_WRITERS_BLOCKED, &journal->j_state));
2956}
2957
2958static void queue_log_writer(struct super_block *s)
2959{
2960 wait_queue_entry_t wait;
2961 struct reiserfs_journal *journal = SB_JOURNAL(s);
2962 set_bit(J_WRITERS_QUEUED, &journal->j_state);
2963
2964
2965
2966
2967
2968 init_waitqueue_entry(&wait, current);
2969 add_wait_queue(&journal->j_join_wait, &wait);
2970 set_current_state(TASK_UNINTERRUPTIBLE);
2971 if (test_bit(J_WRITERS_QUEUED, &journal->j_state)) {
2972 int depth = reiserfs_write_unlock_nested(s);
2973 schedule();
2974 reiserfs_write_lock_nested(s, depth);
2975 }
2976 __set_current_state(TASK_RUNNING);
2977 remove_wait_queue(&journal->j_join_wait, &wait);
2978}
2979
2980static void wake_queued_writers(struct super_block *s)
2981{
2982 struct reiserfs_journal *journal = SB_JOURNAL(s);
2983 if (test_and_clear_bit(J_WRITERS_QUEUED, &journal->j_state))
2984 wake_up(&journal->j_join_wait);
2985}
2986
2987static void let_transaction_grow(struct super_block *sb, unsigned int trans_id)
2988{
2989 struct reiserfs_journal *journal = SB_JOURNAL(sb);
2990 unsigned long bcount = journal->j_bcount;
2991 while (1) {
2992 int depth;
2993
2994 depth = reiserfs_write_unlock_nested(sb);
2995 schedule_timeout_uninterruptible(1);
2996 reiserfs_write_lock_nested(sb, depth);
2997
2998 journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
2999 while ((atomic_read(&journal->j_wcount) > 0 ||
3000 atomic_read(&journal->j_jlock)) &&
3001 journal->j_trans_id == trans_id) {
3002 queue_log_writer(sb);
3003 }
3004 if (journal->j_trans_id != trans_id)
3005 break;
3006 if (bcount == journal->j_bcount)
3007 break;
3008 bcount = journal->j_bcount;
3009 }
3010}
3011
3012
3013
3014
3015
3016
3017
3018
3019static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
3020 struct super_block *sb, unsigned long nblocks,
3021 int join)
3022{
3023 time_t now = get_seconds();
3024 unsigned int old_trans_id;
3025 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3026 struct reiserfs_transaction_handle myth;
3027 int sched_count = 0;
3028 int retval;
3029 int depth;
3030
3031 reiserfs_check_lock_depth(sb, "journal_begin");
3032 BUG_ON(nblocks > journal->j_trans_max);
3033
3034 PROC_INFO_INC(sb, journal.journal_being);
3035
3036 th->t_refcount = 1;
3037 th->t_super = sb;
3038
3039relock:
3040 lock_journal(sb);
3041 if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) {
3042 unlock_journal(sb);
3043 retval = journal->j_errno;
3044 goto out_fail;
3045 }
3046 journal->j_bcount++;
3047
3048 if (test_bit(J_WRITERS_BLOCKED, &journal->j_state)) {
3049 unlock_journal(sb);
3050 depth = reiserfs_write_unlock_nested(sb);
3051 reiserfs_wait_on_write_block(sb);
3052 reiserfs_write_lock_nested(sb, depth);
3053 PROC_INFO_INC(sb, journal.journal_relock_writers);
3054 goto relock;
3055 }
3056 now = get_seconds();
3057
3058
3059
3060
3061
3062
3063
3064
3065 if ((!join && journal->j_must_wait > 0) ||
3066 (!join
3067 && (journal->j_len_alloc + nblocks + 2) >= journal->j_max_batch)
3068 || (!join && atomic_read(&journal->j_wcount) > 0
3069 && journal->j_trans_start_time > 0
3070 && (now - journal->j_trans_start_time) >
3071 journal->j_max_trans_age) || (!join
3072 && atomic_read(&journal->j_jlock))
3073 || (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
3074
3075 old_trans_id = journal->j_trans_id;
3076
3077 unlock_journal(sb);
3078
3079 if (!join && (journal->j_len_alloc + nblocks + 2) >=
3080 journal->j_max_batch &&
3081 ((journal->j_len + nblocks + 2) * 100) <
3082 (journal->j_len_alloc * 75)) {
3083 if (atomic_read(&journal->j_wcount) > 10) {
3084 sched_count++;
3085 queue_log_writer(sb);
3086 goto relock;
3087 }
3088 }
3089
3090
3091
3092
3093 if (atomic_read(&journal->j_jlock)) {
3094 while (journal->j_trans_id == old_trans_id &&
3095 atomic_read(&journal->j_jlock)) {
3096 queue_log_writer(sb);
3097 }
3098 goto relock;
3099 }
3100 retval = journal_join(&myth, sb);
3101 if (retval)
3102 goto out_fail;
3103
3104
3105 if (old_trans_id != journal->j_trans_id) {
3106 retval = do_journal_end(&myth, 0);
3107 } else {
3108 retval = do_journal_end(&myth, COMMIT_NOW);
3109 }
3110
3111 if (retval)
3112 goto out_fail;
3113
3114 PROC_INFO_INC(sb, journal.journal_relock_wcount);
3115 goto relock;
3116 }
3117
3118 if (journal->j_trans_start_time == 0) {
3119 journal->j_trans_start_time = get_seconds();
3120 }
3121 atomic_inc(&journal->j_wcount);
3122 journal->j_len_alloc += nblocks;
3123 th->t_blocks_logged = 0;
3124 th->t_blocks_allocated = nblocks;
3125 th->t_trans_id = journal->j_trans_id;
3126 unlock_journal(sb);
3127 INIT_LIST_HEAD(&th->t_list);
3128 return 0;
3129
3130out_fail:
3131 memset(th, 0, sizeof(*th));
3132
3133
3134
3135
3136
3137 th->t_super = sb;
3138 return retval;
3139}
3140
3141struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
3142 super_block
3143 *s,
3144 int nblocks)
3145{
3146 int ret;
3147 struct reiserfs_transaction_handle *th;
3148
3149
3150
3151
3152
3153 if (reiserfs_transaction_running(s)) {
3154 th = current->journal_info;
3155 th->t_refcount++;
3156 BUG_ON(th->t_refcount < 2);
3157
3158 return th;
3159 }
3160 th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS);
3161 if (!th)
3162 return NULL;
3163 ret = journal_begin(th, s, nblocks);
3164 if (ret) {
3165 kfree(th);
3166 return NULL;
3167 }
3168
3169 SB_JOURNAL(s)->j_persistent_trans++;
3170 return th;
3171}
3172
3173int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *th)
3174{
3175 struct super_block *s = th->t_super;
3176 int ret = 0;
3177 if (th->t_trans_id)
3178 ret = journal_end(th);
3179 else
3180 ret = -EIO;
3181 if (th->t_refcount == 0) {
3182 SB_JOURNAL(s)->j_persistent_trans--;
3183 kfree(th);
3184 }
3185 return ret;
3186}
3187
3188static int journal_join(struct reiserfs_transaction_handle *th,
3189 struct super_block *sb)
3190{
3191 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3192
3193
3194
3195
3196
3197 th->t_handle_save = cur_th;
3198 BUG_ON(cur_th && cur_th->t_refcount > 1);
3199 return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN);
3200}
3201
3202int journal_join_abort(struct reiserfs_transaction_handle *th,
3203 struct super_block *sb)
3204{
3205 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3206
3207
3208
3209
3210
3211 th->t_handle_save = cur_th;
3212 BUG_ON(cur_th && cur_th->t_refcount > 1);
3213 return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT);
3214}
3215
3216int journal_begin(struct reiserfs_transaction_handle *th,
3217 struct super_block *sb, unsigned long nblocks)
3218{
3219 struct reiserfs_transaction_handle *cur_th = current->journal_info;
3220 int ret;
3221
3222 th->t_handle_save = NULL;
3223 if (cur_th) {
3224
3225 if (cur_th->t_super == sb) {
3226 BUG_ON(!cur_th->t_refcount);
3227 cur_th->t_refcount++;
3228 memcpy(th, cur_th, sizeof(*th));
3229 if (th->t_refcount <= 1)
3230 reiserfs_warning(sb, "reiserfs-2005",
3231 "BAD: refcount <= 1, but "
3232 "journal_info != 0");
3233 return 0;
3234 } else {
3235
3236
3237
3238
3239
3240 reiserfs_warning(sb, "clm-2100",
3241 "nesting info a different FS");
3242 th->t_handle_save = current->journal_info;
3243 current->journal_info = th;
3244 }
3245 } else {
3246 current->journal_info = th;
3247 }
3248 ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG);
3249 BUG_ON(current->journal_info != th);
3250
3251
3252
3253
3254
3255 if (ret)
3256 current->journal_info = th->t_handle_save;
3257 else
3258 BUG_ON(!th->t_refcount);
3259
3260 return ret;
3261}
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273int journal_mark_dirty(struct reiserfs_transaction_handle *th,
3274 struct buffer_head *bh)
3275{
3276 struct super_block *sb = th->t_super;
3277 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3278 struct reiserfs_journal_cnode *cn = NULL;
3279 int count_already_incd = 0;
3280 int prepared = 0;
3281 BUG_ON(!th->t_trans_id);
3282
3283 PROC_INFO_INC(sb, journal.mark_dirty);
3284 if (th->t_trans_id != journal->j_trans_id) {
3285 reiserfs_panic(th->t_super, "journal-1577",
3286 "handle trans id %ld != current trans id %ld",
3287 th->t_trans_id, journal->j_trans_id);
3288 }
3289
3290 prepared = test_clear_buffer_journal_prepared(bh);
3291 clear_buffer_journal_restore_dirty(bh);
3292
3293 if (buffer_journaled(bh)) {
3294 PROC_INFO_INC(sb, journal.mark_dirty_already);
3295 return 0;
3296 }
3297
3298
3299
3300
3301
3302
3303 if (!prepared || buffer_dirty(bh)) {
3304 reiserfs_warning(sb, "journal-1777",
3305 "buffer %llu bad state "
3306 "%cPREPARED %cLOCKED %cDIRTY %cJDIRTY_WAIT",
3307 (unsigned long long)bh->b_blocknr,
3308 prepared ? ' ' : '!',
3309 buffer_locked(bh) ? ' ' : '!',
3310 buffer_dirty(bh) ? ' ' : '!',
3311 buffer_journal_dirty(bh) ? ' ' : '!');
3312 }
3313
3314 if (atomic_read(&journal->j_wcount) <= 0) {
3315 reiserfs_warning(sb, "journal-1409",
3316 "returning because j_wcount was %d",
3317 atomic_read(&journal->j_wcount));
3318 return 1;
3319 }
3320
3321
3322
3323
3324
3325 if (journal->j_len >= journal->j_trans_max) {
3326 reiserfs_panic(th->t_super, "journal-1413",
3327 "j_len (%lu) is too big",
3328 journal->j_len);
3329 }
3330
3331 if (buffer_journal_dirty(bh)) {
3332 count_already_incd = 1;
3333 PROC_INFO_INC(sb, journal.mark_dirty_notjournal);
3334 clear_buffer_journal_dirty(bh);
3335 }
3336
3337 if (journal->j_len > journal->j_len_alloc) {
3338 journal->j_len_alloc = journal->j_len + JOURNAL_PER_BALANCE_CNT;
3339 }
3340
3341 set_buffer_journaled(bh);
3342
3343
3344 if (!cn) {
3345 cn = get_cnode(sb);
3346 if (!cn) {
3347 reiserfs_panic(sb, "journal-4", "get_cnode failed!");
3348 }
3349
3350 if (th->t_blocks_logged == th->t_blocks_allocated) {
3351 th->t_blocks_allocated += JOURNAL_PER_BALANCE_CNT;
3352 journal->j_len_alloc += JOURNAL_PER_BALANCE_CNT;
3353 }
3354 th->t_blocks_logged++;
3355 journal->j_len++;
3356
3357 cn->bh = bh;
3358 cn->blocknr = bh->b_blocknr;
3359 cn->sb = sb;
3360 cn->jlist = NULL;
3361 insert_journal_hash(journal->j_hash_table, cn);
3362 if (!count_already_incd) {
3363 get_bh(bh);
3364 }
3365 }
3366 cn->next = NULL;
3367 cn->prev = journal->j_last;
3368 cn->bh = bh;
3369 if (journal->j_last) {
3370 journal->j_last->next = cn;
3371 journal->j_last = cn;
3372 } else {
3373 journal->j_first = cn;
3374 journal->j_last = cn;
3375 }
3376 reiserfs_schedule_old_flush(sb);
3377 return 0;
3378}
3379
3380int journal_end(struct reiserfs_transaction_handle *th)
3381{
3382 struct super_block *sb = th->t_super;
3383 if (!current->journal_info && th->t_refcount > 1)
3384 reiserfs_warning(sb, "REISER-NESTING",
3385 "th NULL, refcount %d", th->t_refcount);
3386
3387 if (!th->t_trans_id) {
3388 WARN_ON(1);
3389 return -EIO;
3390 }
3391
3392 th->t_refcount--;
3393 if (th->t_refcount > 0) {
3394 struct reiserfs_transaction_handle *cur_th =
3395 current->journal_info;
3396
3397
3398
3399
3400
3401 BUG_ON(cur_th->t_super != th->t_super);
3402
3403 if (th != cur_th) {
3404 memcpy(current->journal_info, th, sizeof(*th));
3405 th->t_trans_id = 0;
3406 }
3407 return 0;
3408 } else {
3409 return do_journal_end(th, 0);
3410 }
3411}
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421static int remove_from_transaction(struct super_block *sb,
3422 b_blocknr_t blocknr, int already_cleaned)
3423{
3424 struct buffer_head *bh;
3425 struct reiserfs_journal_cnode *cn;
3426 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3427 int ret = 0;
3428
3429 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3430 if (!cn || !cn->bh) {
3431 return ret;
3432 }
3433 bh = cn->bh;
3434 if (cn->prev) {
3435 cn->prev->next = cn->next;
3436 }
3437 if (cn->next) {
3438 cn->next->prev = cn->prev;
3439 }
3440 if (cn == journal->j_first) {
3441 journal->j_first = cn->next;
3442 }
3443 if (cn == journal->j_last) {
3444 journal->j_last = cn->prev;
3445 }
3446 if (bh)
3447 remove_journal_hash(sb, journal->j_hash_table, NULL,
3448 bh->b_blocknr, 0);
3449 clear_buffer_journaled(bh);
3450
3451 if (!already_cleaned) {
3452 clear_buffer_journal_dirty(bh);
3453 clear_buffer_dirty(bh);
3454 clear_buffer_journal_test(bh);
3455 put_bh(bh);
3456 if (atomic_read(&bh->b_count) < 0) {
3457 reiserfs_warning(sb, "journal-1752",
3458 "b_count < 0");
3459 }
3460 ret = 1;
3461 }
3462 journal->j_len--;
3463 journal->j_len_alloc--;
3464 free_cnode(sb, cn);
3465 return ret;
3466}
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479static int can_dirty(struct reiserfs_journal_cnode *cn)
3480{
3481 struct super_block *sb = cn->sb;
3482 b_blocknr_t blocknr = cn->blocknr;
3483 struct reiserfs_journal_cnode *cur = cn->hprev;
3484 int can_dirty = 1;
3485
3486
3487
3488
3489
3490
3491 while (cur && can_dirty) {
3492 if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb &&
3493 cur->blocknr == blocknr) {
3494 can_dirty = 0;
3495 }
3496 cur = cur->hprev;
3497 }
3498
3499
3500
3501
3502 cur = cn->hnext;
3503 while (cur && can_dirty) {
3504 if (cur->jlist && cur->jlist->j_len > 0 &&
3505 atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh &&
3506 cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
3507 can_dirty = 0;
3508 }
3509 cur = cur->hnext;
3510 }
3511 return can_dirty;
3512}
3513
3514
3515
3516
3517
3518int journal_end_sync(struct reiserfs_transaction_handle *th)
3519{
3520 struct super_block *sb = th->t_super;
3521 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3522
3523 BUG_ON(!th->t_trans_id);
3524
3525 BUG_ON(th->t_refcount > 1);
3526 if (journal->j_len == 0) {
3527 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3528 1);
3529 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
3530 }
3531 return do_journal_end(th, COMMIT_NOW | WAIT);
3532}
3533
3534
3535static void flush_async_commits(struct work_struct *work)
3536{
3537 struct reiserfs_journal *journal =
3538 container_of(work, struct reiserfs_journal, j_work.work);
3539 struct super_block *sb = journal->j_work_sb;
3540 struct reiserfs_journal_list *jl;
3541 struct list_head *entry;
3542
3543 reiserfs_write_lock(sb);
3544 if (!list_empty(&journal->j_journal_list)) {
3545
3546 entry = journal->j_journal_list.prev;
3547 jl = JOURNAL_LIST_ENTRY(entry);
3548 flush_commit_list(sb, jl, 1);
3549 }
3550 reiserfs_write_unlock(sb);
3551}
3552
3553
3554
3555
3556
3557void reiserfs_flush_old_commits(struct super_block *sb)
3558{
3559 time_t now;
3560 struct reiserfs_transaction_handle th;
3561 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3562
3563 now = get_seconds();
3564
3565
3566
3567
3568 if (list_empty(&journal->j_journal_list))
3569 return;
3570
3571
3572
3573
3574
3575 if (atomic_read(&journal->j_wcount) <= 0 &&
3576 journal->j_trans_start_time > 0 &&
3577 journal->j_len > 0 &&
3578 (now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3579 if (!journal_join(&th, sb)) {
3580 reiserfs_prepare_for_journal(sb,
3581 SB_BUFFER_WITH_SB(sb),
3582 1);
3583 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3584
3585
3586
3587
3588
3589
3590 do_journal_end(&th, COMMIT_NOW | WAIT);
3591 }
3592 }
3593}
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610static int check_journal_end(struct reiserfs_transaction_handle *th, int flags)
3611{
3612
3613 time_t now;
3614 int flush = flags & FLUSH_ALL;
3615 int commit_now = flags & COMMIT_NOW;
3616 int wait_on_commit = flags & WAIT;
3617 struct reiserfs_journal_list *jl;
3618 struct super_block *sb = th->t_super;
3619 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3620
3621 BUG_ON(!th->t_trans_id);
3622
3623 if (th->t_trans_id != journal->j_trans_id) {
3624 reiserfs_panic(th->t_super, "journal-1577",
3625 "handle trans id %ld != current trans id %ld",
3626 th->t_trans_id, journal->j_trans_id);
3627 }
3628
3629 journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged);
3630
3631 if (atomic_read(&journal->j_wcount) > 0)
3632 atomic_dec(&journal->j_wcount);
3633
3634
3635
3636
3637
3638
3639
3640 BUG_ON(journal->j_len == 0);
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650 if (atomic_read(&journal->j_wcount) > 0) {
3651 if (flush || commit_now) {
3652 unsigned trans_id;
3653
3654 jl = journal->j_current_jl;
3655 trans_id = jl->j_trans_id;
3656 if (wait_on_commit)
3657 jl->j_state |= LIST_COMMIT_PENDING;
3658 atomic_set(&journal->j_jlock, 1);
3659 if (flush) {
3660 journal->j_next_full_flush = 1;
3661 }
3662 unlock_journal(sb);
3663
3664
3665
3666
3667
3668 while (journal->j_trans_id == trans_id) {
3669 if (atomic_read(&journal->j_jlock)) {
3670 queue_log_writer(sb);
3671 } else {
3672 lock_journal(sb);
3673 if (journal->j_trans_id == trans_id) {
3674 atomic_set(&journal->j_jlock,
3675 1);
3676 }
3677 unlock_journal(sb);
3678 }
3679 }
3680 BUG_ON(journal->j_trans_id == trans_id);
3681
3682 if (commit_now
3683 && journal_list_still_alive(sb, trans_id)
3684 && wait_on_commit) {
3685 flush_commit_list(sb, jl, 1);
3686 }
3687 return 0;
3688 }
3689 unlock_journal(sb);
3690 return 0;
3691 }
3692
3693
3694 now = get_seconds();
3695 if ((now - journal->j_trans_start_time) > journal->j_max_trans_age) {
3696 commit_now = 1;
3697 journal->j_next_async_flush = 1;
3698 }
3699
3700
3701 if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock))
3702 && !flush && !commit_now && (journal->j_len < journal->j_max_batch)
3703 && journal->j_len_alloc < journal->j_max_batch
3704 && journal->j_cnode_free > (journal->j_trans_max * 3)) {
3705 journal->j_bcount++;
3706 unlock_journal(sb);
3707 return 0;
3708 }
3709
3710 if (journal->j_start > SB_ONDISK_JOURNAL_SIZE(sb)) {
3711 reiserfs_panic(sb, "journal-003",
3712 "j_start (%ld) is too high",
3713 journal->j_start);
3714 }
3715 return 1;
3716}
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735int journal_mark_freed(struct reiserfs_transaction_handle *th,
3736 struct super_block *sb, b_blocknr_t blocknr)
3737{
3738 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3739 struct reiserfs_journal_cnode *cn = NULL;
3740 struct buffer_head *bh = NULL;
3741 struct reiserfs_list_bitmap *jb = NULL;
3742 int cleaned = 0;
3743 BUG_ON(!th->t_trans_id);
3744
3745 cn = get_journal_hash_dev(sb, journal->j_hash_table, blocknr);
3746 if (cn && cn->bh) {
3747 bh = cn->bh;
3748 get_bh(bh);
3749 }
3750
3751 if (bh && buffer_journal_new(bh)) {
3752 clear_buffer_journal_new(bh);
3753 clear_prepared_bits(bh);
3754 reiserfs_clean_and_file_buffer(bh);
3755 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3756 } else {
3757
3758
3759
3760
3761 jb = journal->j_current_jl->j_list_bitmap;
3762 if (!jb) {
3763 reiserfs_panic(sb, "journal-1702",
3764 "journal_list_bitmap is NULL");
3765 }
3766 set_bit_in_list_bitmap(sb, blocknr, jb);
3767
3768
3769
3770 if (bh) {
3771 clear_prepared_bits(bh);
3772 reiserfs_clean_and_file_buffer(bh);
3773 }
3774 cleaned = remove_from_transaction(sb, blocknr, cleaned);
3775
3776
3777
3778
3779
3780 cn = get_journal_hash_dev(sb, journal->j_list_hash_table,
3781 blocknr);
3782 while (cn) {
3783 if (sb == cn->sb && blocknr == cn->blocknr) {
3784 set_bit(BLOCK_FREED, &cn->state);
3785 if (cn->bh) {
3786
3787
3788
3789
3790
3791 if (!cleaned) {
3792 clear_buffer_journal_dirty(cn->
3793 bh);
3794 clear_buffer_dirty(cn->bh);
3795 clear_buffer_journal_test(cn->
3796 bh);
3797 cleaned = 1;
3798 put_bh(cn->bh);
3799 if (atomic_read
3800 (&cn->bh->b_count) < 0) {
3801 reiserfs_warning(sb,
3802 "journal-2138",
3803 "cn->bh->b_count < 0");
3804 }
3805 }
3806
3807
3808
3809
3810 if (cn->jlist) {
3811 atomic_dec(&cn->jlist->
3812 j_nonzerolen);
3813 }
3814 cn->bh = NULL;
3815 }
3816 }
3817 cn = cn->hnext;
3818 }
3819 }
3820
3821 if (bh)
3822 release_buffer_page(bh);
3823 return 0;
3824}
3825
3826void reiserfs_update_inode_transaction(struct inode *inode)
3827{
3828 struct reiserfs_journal *journal = SB_JOURNAL(inode->i_sb);
3829 REISERFS_I(inode)->i_jl = journal->j_current_jl;
3830 REISERFS_I(inode)->i_trans_id = journal->j_trans_id;
3831}
3832
3833
3834
3835
3836
3837static int __commit_trans_jl(struct inode *inode, unsigned long id,
3838 struct reiserfs_journal_list *jl)
3839{
3840 struct reiserfs_transaction_handle th;
3841 struct super_block *sb = inode->i_sb;
3842 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3843 int ret = 0;
3844
3845
3846
3847
3848
3849 if (id == journal->j_trans_id) {
3850 jl = journal->j_current_jl;
3851
3852
3853
3854
3855 let_transaction_grow(sb, id);
3856 if (journal->j_trans_id != id) {
3857 goto flush_commit_only;
3858 }
3859
3860 ret = journal_begin(&th, sb, 1);
3861 if (ret)
3862 return ret;
3863
3864
3865 if (journal->j_trans_id != id) {
3866 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
3867 1);
3868 journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
3869 ret = journal_end(&th);
3870 goto flush_commit_only;
3871 }
3872
3873 ret = journal_end_sync(&th);
3874 if (!ret)
3875 ret = 1;
3876
3877 } else {
3878
3879
3880
3881
3882
3883flush_commit_only:
3884 if (journal_list_still_alive(inode->i_sb, id)) {
3885
3886
3887
3888
3889
3890 if (atomic_read(&jl->j_commit_left) > 1)
3891 ret = 1;
3892 flush_commit_list(sb, jl, 1);
3893 if (journal->j_errno)
3894 ret = journal->j_errno;
3895 }
3896 }
3897
3898 return ret;
3899}
3900
3901int reiserfs_commit_for_inode(struct inode *inode)
3902{
3903 unsigned int id = REISERFS_I(inode)->i_trans_id;
3904 struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
3905
3906
3907
3908
3909
3910 if (!id || !jl) {
3911 reiserfs_update_inode_transaction(inode);
3912 id = REISERFS_I(inode)->i_trans_id;
3913
3914 }
3915
3916 return __commit_trans_jl(inode, id, jl);
3917}
3918
3919void reiserfs_restore_prepared_buffer(struct super_block *sb,
3920 struct buffer_head *bh)
3921{
3922 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3923 PROC_INFO_INC(sb, journal.restore_prepared);
3924 if (!bh) {
3925 return;
3926 }
3927 if (test_clear_buffer_journal_restore_dirty(bh) &&
3928 buffer_journal_dirty(bh)) {
3929 struct reiserfs_journal_cnode *cn;
3930 reiserfs_write_lock(sb);
3931 cn = get_journal_hash_dev(sb,
3932 journal->j_list_hash_table,
3933 bh->b_blocknr);
3934 if (cn && can_dirty(cn)) {
3935 set_buffer_journal_test(bh);
3936 mark_buffer_dirty(bh);
3937 }
3938 reiserfs_write_unlock(sb);
3939 }
3940 clear_buffer_journal_prepared(bh);
3941}
3942
3943extern struct tree_balance *cur_tb;
3944
3945
3946
3947
3948
3949
3950int reiserfs_prepare_for_journal(struct super_block *sb,
3951 struct buffer_head *bh, int wait)
3952{
3953 PROC_INFO_INC(sb, journal.prepare);
3954
3955 if (!trylock_buffer(bh)) {
3956 if (!wait)
3957 return 0;
3958 lock_buffer(bh);
3959 }
3960 set_buffer_journal_prepared(bh);
3961 if (test_clear_buffer_dirty(bh) && buffer_journal_dirty(bh)) {
3962 clear_buffer_journal_test(bh);
3963 set_buffer_journal_restore_dirty(bh);
3964 }
3965 unlock_buffer(bh);
3966 return 1;
3967}
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979static int do_journal_end(struct reiserfs_transaction_handle *th, int flags)
3980{
3981 struct super_block *sb = th->t_super;
3982 struct reiserfs_journal *journal = SB_JOURNAL(sb);
3983 struct reiserfs_journal_cnode *cn, *next, *jl_cn;
3984 struct reiserfs_journal_cnode *last_cn = NULL;
3985 struct reiserfs_journal_desc *desc;
3986 struct reiserfs_journal_commit *commit;
3987 struct buffer_head *c_bh;
3988 struct buffer_head *d_bh;
3989 int cur_write_start = 0;
3990 int old_start;
3991 int i;
3992 int flush;
3993 int wait_on_commit;
3994 struct reiserfs_journal_list *jl, *temp_jl;
3995 struct list_head *entry, *safe;
3996 unsigned long jindex;
3997 unsigned int commit_trans_id;
3998 int trans_half;
3999 int depth;
4000
4001 BUG_ON(th->t_refcount > 1);
4002 BUG_ON(!th->t_trans_id);
4003 BUG_ON(!th->t_super);
4004
4005
4006
4007
4008
4009 if (th->t_trans_id == ~0U)
4010 flags |= FLUSH_ALL | COMMIT_NOW | WAIT;
4011 flush = flags & FLUSH_ALL;
4012 wait_on_commit = flags & WAIT;
4013
4014 current->journal_info = th->t_handle_save;
4015 reiserfs_check_lock_depth(sb, "journal end");
4016 if (journal->j_len == 0) {
4017 reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
4018 1);
4019 journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
4020 }
4021
4022 lock_journal(sb);
4023 if (journal->j_next_full_flush) {
4024 flags |= FLUSH_ALL;
4025 flush = 1;
4026 }
4027 if (journal->j_next_async_flush) {
4028 flags |= COMMIT_NOW | WAIT;
4029 wait_on_commit = 1;
4030 }
4031
4032
4033
4034
4035
4036
4037 if (!check_journal_end(th, flags)) {
4038 reiserfs_schedule_old_flush(sb);
4039 wake_queued_writers(sb);
4040 reiserfs_async_progress_wait(sb);
4041 goto out;
4042 }
4043
4044
4045 if (journal->j_next_full_flush) {
4046 flush = 1;
4047 }
4048
4049
4050
4051
4052
4053 if (journal->j_must_wait > 0) {
4054 flush = 1;
4055 }
4056#ifdef REISERFS_PREALLOCATE
4057
4058
4059
4060
4061 current->journal_info = th;
4062 th->t_refcount++;
4063
4064
4065 reiserfs_discard_all_prealloc(th);
4066
4067 th->t_refcount--;
4068 current->journal_info = th->t_handle_save;
4069#endif
4070
4071
4072 d_bh =
4073 journal_getblk(sb,
4074 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4075 journal->j_start);
4076 set_buffer_uptodate(d_bh);
4077 desc = (struct reiserfs_journal_desc *)(d_bh)->b_data;
4078 memset(d_bh->b_data, 0, d_bh->b_size);
4079 memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8);
4080 set_desc_trans_id(desc, journal->j_trans_id);
4081
4082
4083
4084
4085
4086 c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4087 ((journal->j_start + journal->j_len +
4088 1) % SB_ONDISK_JOURNAL_SIZE(sb)));
4089 commit = (struct reiserfs_journal_commit *)c_bh->b_data;
4090 memset(c_bh->b_data, 0, c_bh->b_size);
4091 set_commit_trans_id(commit, journal->j_trans_id);
4092 set_buffer_uptodate(c_bh);
4093
4094
4095 jl = journal->j_current_jl;
4096
4097
4098
4099
4100
4101
4102
4103 reiserfs_mutex_lock_safe(&jl->j_commit_mutex, sb);
4104
4105
4106 commit_trans_id = jl->j_trans_id;
4107
4108 atomic_set(&jl->j_older_commits_done, 0);
4109 jl->j_trans_id = journal->j_trans_id;
4110 jl->j_timestamp = journal->j_trans_start_time;
4111 jl->j_commit_bh = c_bh;
4112 jl->j_start = journal->j_start;
4113 jl->j_len = journal->j_len;
4114 atomic_set(&jl->j_nonzerolen, journal->j_len);
4115 atomic_set(&jl->j_commit_left, journal->j_len + 2);
4116 jl->j_realblock = NULL;
4117
4118
4119
4120
4121
4122
4123 trans_half = journal_trans_half(sb->s_blocksize);
4124 for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) {
4125 if (buffer_journaled(cn->bh)) {
4126 jl_cn = get_cnode(sb);
4127 if (!jl_cn) {
4128 reiserfs_panic(sb, "journal-1676",
4129 "get_cnode returned NULL");
4130 }
4131 if (i == 0) {
4132 jl->j_realblock = jl_cn;
4133 }
4134 jl_cn->prev = last_cn;
4135 jl_cn->next = NULL;
4136 if (last_cn) {
4137 last_cn->next = jl_cn;
4138 }
4139 last_cn = jl_cn;
4140
4141
4142
4143
4144 if (is_block_in_log_or_reserved_area
4145 (sb, cn->bh->b_blocknr)) {
4146 reiserfs_panic(sb, "journal-2332",
4147 "Trying to log block %lu, "
4148 "which is a log block",
4149 cn->bh->b_blocknr);
4150 }
4151 jl_cn->blocknr = cn->bh->b_blocknr;
4152 jl_cn->state = 0;
4153 jl_cn->sb = sb;
4154 jl_cn->bh = cn->bh;
4155 jl_cn->jlist = jl;
4156 insert_journal_hash(journal->j_list_hash_table, jl_cn);
4157 if (i < trans_half) {
4158 desc->j_realblock[i] =
4159 cpu_to_le32(cn->bh->b_blocknr);
4160 } else {
4161 commit->j_realblock[i - trans_half] =
4162 cpu_to_le32(cn->bh->b_blocknr);
4163 }
4164 } else {
4165 i--;
4166 }
4167 }
4168 set_desc_trans_len(desc, journal->j_len);
4169 set_desc_mount_id(desc, journal->j_mount_id);
4170 set_desc_trans_id(desc, journal->j_trans_id);
4171 set_commit_trans_len(commit, journal->j_len);
4172
4173
4174
4175
4176
4177 BUG_ON(journal->j_len == 0);
4178
4179
4180
4181
4182
4183
4184 mark_buffer_dirty(d_bh);
4185
4186
4187
4188
4189
4190 cur_write_start = journal->j_start;
4191 cn = journal->j_first;
4192 jindex = 1;
4193 while (cn) {
4194 clear_buffer_journal_new(cn->bh);
4195
4196 if (buffer_journaled(cn->bh)) {
4197 struct buffer_head *tmp_bh;
4198 char *addr;
4199 struct page *page;
4200 tmp_bh =
4201 journal_getblk(sb,
4202 SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
4203 ((cur_write_start +
4204 jindex) %
4205 SB_ONDISK_JOURNAL_SIZE(sb)));
4206 set_buffer_uptodate(tmp_bh);
4207 page = cn->bh->b_page;
4208 addr = kmap(page);
4209 memcpy(tmp_bh->b_data,
4210 addr + offset_in_page(cn->bh->b_data),
4211 cn->bh->b_size);
4212 kunmap(page);
4213 mark_buffer_dirty(tmp_bh);
4214 jindex++;
4215 set_buffer_journal_dirty(cn->bh);
4216 clear_buffer_journaled(cn->bh);
4217 } else {
4218
4219
4220
4221
4222 reiserfs_warning(sb, "journal-2048",
4223 "BAD, buffer in journal hash, "
4224 "but not JDirty!");
4225 brelse(cn->bh);
4226 }
4227 next = cn->next;
4228 free_cnode(sb, cn);
4229 cn = next;
4230 reiserfs_cond_resched(sb);
4231 }
4232
4233
4234
4235
4236
4237
4238
4239 journal->j_current_jl = alloc_journal_list(sb);
4240
4241
4242 list_add_tail(&jl->j_list, &journal->j_journal_list);
4243 list_add_tail(&jl->j_working_list, &journal->j_working_list);
4244 journal->j_num_work_lists++;
4245
4246
4247 old_start = journal->j_start;
4248 journal->j_start =
4249 (journal->j_start + journal->j_len +
4250 2) % SB_ONDISK_JOURNAL_SIZE(sb);
4251 atomic_set(&journal->j_wcount, 0);
4252 journal->j_bcount = 0;
4253 journal->j_last = NULL;
4254 journal->j_first = NULL;
4255 journal->j_len = 0;
4256 journal->j_trans_start_time = 0;
4257
4258 if (++journal->j_trans_id == 0)
4259 journal->j_trans_id = 10;
4260 journal->j_current_jl->j_trans_id = journal->j_trans_id;
4261 journal->j_must_wait = 0;
4262 journal->j_len_alloc = 0;
4263 journal->j_next_full_flush = 0;
4264 journal->j_next_async_flush = 0;
4265 init_journal_hash(sb);
4266
4267
4268
4269
4270
4271 smp_mb();
4272
4273
4274
4275
4276
4277
4278
4279
4280 if (!list_empty(&jl->j_tail_bh_list)) {
4281 depth = reiserfs_write_unlock_nested(sb);
4282 write_ordered_buffers(&journal->j_dirty_buffers_lock,
4283 journal, jl, &jl->j_tail_bh_list);
4284 reiserfs_write_lock_nested(sb, depth);
4285 }
4286 BUG_ON(!list_empty(&jl->j_tail_bh_list));
4287 mutex_unlock(&jl->j_commit_mutex);
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297 if (flush) {
4298 flush_commit_list(sb, jl, 1);
4299 flush_journal_list(sb, jl, 1);
4300 } else if (!(jl->j_state & LIST_COMMIT_PENDING)) {
4301
4302
4303
4304
4305 if (sb->s_flags & MS_ACTIVE)
4306 queue_delayed_work(REISERFS_SB(sb)->commit_wq,
4307 &journal->j_work, HZ / 10);
4308 }
4309
4310
4311
4312
4313
4314
4315first_jl:
4316 list_for_each_safe(entry, safe, &journal->j_journal_list) {
4317 temp_jl = JOURNAL_LIST_ENTRY(entry);
4318 if (journal->j_start <= temp_jl->j_start) {
4319 if ((journal->j_start + journal->j_trans_max + 1) >=
4320 temp_jl->j_start) {
4321 flush_used_journal_lists(sb, temp_jl);
4322 goto first_jl;
4323 } else if ((journal->j_start +
4324 journal->j_trans_max + 1) <
4325 SB_ONDISK_JOURNAL_SIZE(sb)) {
4326
4327
4328
4329
4330
4331
4332 break;
4333 }
4334 } else if ((journal->j_start +
4335 journal->j_trans_max + 1) >
4336 SB_ONDISK_JOURNAL_SIZE(sb)) {
4337 if (((journal->j_start + journal->j_trans_max + 1) %
4338 SB_ONDISK_JOURNAL_SIZE(sb)) >=
4339 temp_jl->j_start) {
4340 flush_used_journal_lists(sb, temp_jl);
4341 goto first_jl;
4342 } else {
4343
4344
4345
4346
4347
4348
4349 break;
4350 }
4351 }
4352 }
4353
4354 journal->j_current_jl->j_list_bitmap =
4355 get_list_bitmap(sb, journal->j_current_jl);
4356
4357 if (!(journal->j_current_jl->j_list_bitmap)) {
4358 reiserfs_panic(sb, "journal-1996",
4359 "could not get a list bitmap");
4360 }
4361
4362 atomic_set(&journal->j_jlock, 0);
4363 unlock_journal(sb);
4364
4365 clear_bit(J_WRITERS_QUEUED, &journal->j_state);
4366 wake_up(&journal->j_join_wait);
4367
4368 if (!flush && wait_on_commit &&
4369 journal_list_still_alive(sb, commit_trans_id)) {
4370 flush_commit_list(sb, jl, 1);
4371 }
4372out:
4373 reiserfs_check_lock_depth(sb, "journal end2");
4374
4375 memset(th, 0, sizeof(*th));
4376
4377
4378
4379
4380
4381 th->t_super = sb;
4382
4383 return journal->j_errno;
4384}
4385
4386
4387void reiserfs_abort_journal(struct super_block *sb, int errno)
4388{
4389 struct reiserfs_journal *journal = SB_JOURNAL(sb);
4390 if (test_bit(J_ABORTED, &journal->j_state))
4391 return;
4392
4393 if (!journal->j_errno)
4394 journal->j_errno = errno;
4395
4396 sb->s_flags |= MS_RDONLY;
4397 set_bit(J_ABORTED, &journal->j_state);
4398
4399#ifdef CONFIG_REISERFS_CHECK
4400 dump_stack();
4401#endif
4402}
4403