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62#include <linux/fs.h>
63#include <linux/blkdev.h>
64#include <linux/interrupt.h>
65#include <linux/completion.h>
66#include <linux/kthread.h>
67#include <linux/buffer_head.h>
68#include <linux/bio.h>
69#include <linux/freezer.h>
70#include <linux/delay.h>
71#include <linux/mutex.h>
72#include <linux/seq_file.h>
73#include <linux/slab.h>
74#include "jfs_incore.h"
75#include "jfs_filsys.h"
76#include "jfs_metapage.h"
77#include "jfs_superblock.h"
78#include "jfs_txnmgr.h"
79#include "jfs_debug.h"
80
81
82
83
84
85static struct lbuf *log_redrive_list;
86static DEFINE_SPINLOCK(log_redrive_lock);
87
88
89
90
91
92#define LOG_LOCK_INIT(log) mutex_init(&(log)->loglock)
93#define LOG_LOCK(log) mutex_lock(&((log)->loglock))
94#define LOG_UNLOCK(log) mutex_unlock(&((log)->loglock))
95
96
97
98
99
100
101#define LOGGC_LOCK_INIT(log) spin_lock_init(&(log)->gclock)
102#define LOGGC_LOCK(log) spin_lock_irq(&(log)->gclock)
103#define LOGGC_UNLOCK(log) spin_unlock_irq(&(log)->gclock)
104#define LOGGC_WAKEUP(tblk) wake_up_all(&(tblk)->gcwait)
105
106
107
108
109#define LOGSYNC_DELTA(logsize) min((logsize)/8, 128*LOGPSIZE)
110#define LOGSYNC_BARRIER(logsize) ((logsize)/4)
111
112
113
114
115
116
117
118
119
120static DEFINE_SPINLOCK(jfsLCacheLock);
121
122#define LCACHE_LOCK(flags) spin_lock_irqsave(&jfsLCacheLock, flags)
123#define LCACHE_UNLOCK(flags) spin_unlock_irqrestore(&jfsLCacheLock, flags)
124
125
126
127
128#define LCACHE_SLEEP_COND(wq, cond, flags) \
129do { \
130 if (cond) \
131 break; \
132 __SLEEP_COND(wq, cond, LCACHE_LOCK(flags), LCACHE_UNLOCK(flags)); \
133} while (0)
134
135#define LCACHE_WAKEUP(event) wake_up(event)
136
137
138
139
140
141
142#define lbmREAD 0x0001
143#define lbmWRITE 0x0002
144
145
146#define lbmRELEASE 0x0004
147
148
149
150
151#define lbmSYNC 0x0008
152
153
154#define lbmFREE 0x0010
155
156
157
158#define lbmDONE 0x0020
159#define lbmERROR 0x0040
160#define lbmGC 0x0080
161
162
163#define lbmDIRECT 0x0100
164
165
166
167
168static LIST_HEAD(jfs_external_logs);
169static struct jfs_log *dummy_log = NULL;
170static DEFINE_MUTEX(jfs_log_mutex);
171
172
173
174
175static int lmWriteRecord(struct jfs_log * log, struct tblock * tblk,
176 struct lrd * lrd, struct tlock * tlck);
177
178static int lmNextPage(struct jfs_log * log);
179static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
180 int activate);
181
182static int open_inline_log(struct super_block *sb);
183static int open_dummy_log(struct super_block *sb);
184static int lbmLogInit(struct jfs_log * log);
185static void lbmLogShutdown(struct jfs_log * log);
186static struct lbuf *lbmAllocate(struct jfs_log * log, int);
187static void lbmFree(struct lbuf * bp);
188static void lbmfree(struct lbuf * bp);
189static int lbmRead(struct jfs_log * log, int pn, struct lbuf ** bpp);
190static void lbmWrite(struct jfs_log * log, struct lbuf * bp, int flag, int cant_block);
191static void lbmDirectWrite(struct jfs_log * log, struct lbuf * bp, int flag);
192static int lbmIOWait(struct lbuf * bp, int flag);
193static bio_end_io_t lbmIODone;
194static void lbmStartIO(struct lbuf * bp);
195static void lmGCwrite(struct jfs_log * log, int cant_block);
196static int lmLogSync(struct jfs_log * log, int hard_sync);
197
198
199
200
201
202
203#ifdef CONFIG_JFS_STATISTICS
204static struct lmStat {
205 uint commit;
206 uint pagedone;
207 uint submitted;
208 uint full_page;
209 uint partial_page;
210} lmStat;
211#endif
212
213static void write_special_inodes(struct jfs_log *log,
214 int (*writer)(struct address_space *))
215{
216 struct jfs_sb_info *sbi;
217
218 list_for_each_entry(sbi, &log->sb_list, log_list) {
219 writer(sbi->ipbmap->i_mapping);
220 writer(sbi->ipimap->i_mapping);
221 writer(sbi->direct_inode->i_mapping);
222 }
223}
224
225
226
227
228
229
230
231
232
233
234
235
236
237int lmLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
238 struct tlock * tlck)
239{
240 int lsn;
241 int diffp, difft;
242 struct metapage *mp = NULL;
243 unsigned long flags;
244
245 jfs_info("lmLog: log:0x%p tblk:0x%p, lrd:0x%p tlck:0x%p",
246 log, tblk, lrd, tlck);
247
248 LOG_LOCK(log);
249
250
251 if (tblk == NULL)
252 goto writeRecord;
253
254
255 if (tlck == NULL ||
256 tlck->type & tlckBTROOT || (mp = tlck->mp) == NULL)
257 goto writeRecord;
258
259
260
261
262 lsn = log->lsn;
263
264 LOGSYNC_LOCK(log, flags);
265
266
267
268
269 if (mp->lsn == 0) {
270 mp->log = log;
271 mp->lsn = lsn;
272 log->count++;
273
274
275 list_add_tail(&mp->synclist, &log->synclist);
276 }
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296 if (tblk->lsn == 0) {
297
298 tblk->lsn = mp->lsn;
299 log->count++;
300
301
302 list_add(&tblk->synclist, &mp->synclist);
303 }
304
305
306
307 else {
308
309 logdiff(diffp, mp->lsn, log);
310 logdiff(difft, tblk->lsn, log);
311 if (diffp < difft) {
312
313 tblk->lsn = mp->lsn;
314
315
316 list_move(&tblk->synclist, &mp->synclist);
317 }
318 }
319
320 LOGSYNC_UNLOCK(log, flags);
321
322
323
324
325 writeRecord:
326 lsn = lmWriteRecord(log, tblk, lrd, tlck);
327
328
329
330
331 logdiff(diffp, lsn, log);
332 if (diffp >= log->nextsync)
333 lsn = lmLogSync(log, 0);
334
335
336 log->lsn = lsn;
337
338 LOG_UNLOCK(log);
339
340
341 return lsn;
342}
343
344
345
346
347
348
349
350
351
352
353
354
355static int
356lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
357 struct tlock * tlck)
358{
359 int lsn = 0;
360 struct lbuf *bp;
361 struct logpage *lp;
362 caddr_t dst;
363 int dstoffset;
364 int freespace;
365 caddr_t p;
366 caddr_t src;
367 int srclen;
368 int nbytes;
369 int i;
370 int len;
371 struct linelock *linelock;
372 struct lv *lv;
373 struct lvd *lvd;
374 int l2linesize;
375
376 len = 0;
377
378
379 bp = (struct lbuf *) log->bp;
380 lp = (struct logpage *) bp->l_ldata;
381 dstoffset = log->eor;
382
383
384 if (tlck == NULL)
385 goto moveLrd;
386
387
388
389
390
391 if (tlck->flag & tlckPAGELOCK) {
392 p = (caddr_t) (tlck->mp->data);
393 linelock = (struct linelock *) & tlck->lock;
394 }
395
396 else if (tlck->flag & tlckINODELOCK) {
397 if (tlck->type & tlckDTREE)
398 p = (caddr_t) &JFS_IP(tlck->ip)->i_dtroot;
399 else
400 p = (caddr_t) &JFS_IP(tlck->ip)->i_xtroot;
401 linelock = (struct linelock *) & tlck->lock;
402 }
403#ifdef _JFS_WIP
404 else if (tlck->flag & tlckINLINELOCK) {
405
406 inlinelock = (struct inlinelock *) & tlck;
407 p = (caddr_t) & inlinelock->pxd;
408 linelock = (struct linelock *) & tlck;
409 }
410#endif
411 else {
412 jfs_err("lmWriteRecord: UFO tlck:0x%p", tlck);
413 return 0;
414 }
415 l2linesize = linelock->l2linesize;
416
417 moveData:
418 ASSERT(linelock->index <= linelock->maxcnt);
419
420 lv = linelock->lv;
421 for (i = 0; i < linelock->index; i++, lv++) {
422 if (lv->length == 0)
423 continue;
424
425
426 if (dstoffset >= LOGPSIZE - LOGPTLRSIZE) {
427
428 lmNextPage(log);
429
430 bp = log->bp;
431 lp = (struct logpage *) bp->l_ldata;
432 dstoffset = LOGPHDRSIZE;
433 }
434
435
436
437
438 src = (u8 *) p + (lv->offset << l2linesize);
439 srclen = lv->length << l2linesize;
440 len += srclen;
441 while (srclen > 0) {
442 freespace = (LOGPSIZE - LOGPTLRSIZE) - dstoffset;
443 nbytes = min(freespace, srclen);
444 dst = (caddr_t) lp + dstoffset;
445 memcpy(dst, src, nbytes);
446 dstoffset += nbytes;
447
448
449 if (dstoffset < LOGPSIZE - LOGPTLRSIZE)
450 break;
451
452
453 lmNextPage(log);
454
455 bp = (struct lbuf *) log->bp;
456 lp = (struct logpage *) bp->l_ldata;
457 dstoffset = LOGPHDRSIZE;
458
459 srclen -= nbytes;
460 src += nbytes;
461 }
462
463
464
465
466 len += 4;
467 lvd = (struct lvd *) ((caddr_t) lp + dstoffset);
468 lvd->offset = cpu_to_le16(lv->offset);
469 lvd->length = cpu_to_le16(lv->length);
470 dstoffset += 4;
471 jfs_info("lmWriteRecord: lv offset:%d length:%d",
472 lv->offset, lv->length);
473 }
474
475 if ((i = linelock->next)) {
476 linelock = (struct linelock *) lid_to_tlock(i);
477 goto moveData;
478 }
479
480
481
482
483 moveLrd:
484 lrd->length = cpu_to_le16(len);
485
486 src = (caddr_t) lrd;
487 srclen = LOGRDSIZE;
488
489 while (srclen > 0) {
490 freespace = (LOGPSIZE - LOGPTLRSIZE) - dstoffset;
491 nbytes = min(freespace, srclen);
492 dst = (caddr_t) lp + dstoffset;
493 memcpy(dst, src, nbytes);
494
495 dstoffset += nbytes;
496 srclen -= nbytes;
497
498
499 if (srclen)
500 goto pageFull;
501
502
503
504
505
506
507 log->eor = dstoffset;
508 bp->l_eor = dstoffset;
509 lsn = (log->page << L2LOGPSIZE) + dstoffset;
510
511 if (lrd->type & cpu_to_le16(LOG_COMMIT)) {
512 tblk->clsn = lsn;
513 jfs_info("wr: tclsn:0x%x, beor:0x%x", tblk->clsn,
514 bp->l_eor);
515
516 INCREMENT(lmStat.commit);
517
518
519
520
521
522
523
524
525
526 LOGGC_LOCK(log);
527
528
529 tblk->flag = tblkGC_QUEUE;
530 tblk->bp = log->bp;
531 tblk->pn = log->page;
532 tblk->eor = log->eor;
533
534
535 list_add_tail(&tblk->cqueue, &log->cqueue);
536
537 LOGGC_UNLOCK(log);
538 }
539
540 jfs_info("lmWriteRecord: lrd:0x%04x bp:0x%p pn:%d eor:0x%x",
541 le16_to_cpu(lrd->type), log->bp, log->page, dstoffset);
542
543
544 if (dstoffset < LOGPSIZE - LOGPTLRSIZE)
545 return lsn;
546
547 pageFull:
548
549 lmNextPage(log);
550
551 bp = (struct lbuf *) log->bp;
552 lp = (struct logpage *) bp->l_ldata;
553 dstoffset = LOGPHDRSIZE;
554 src += nbytes;
555 }
556
557 return lsn;
558}
559
560
561
562
563
564
565
566
567
568
569
570
571
572static int lmNextPage(struct jfs_log * log)
573{
574 struct logpage *lp;
575 int lspn;
576 int pn;
577 struct lbuf *bp;
578 struct lbuf *nextbp;
579 struct tblock *tblk;
580
581
582 pn = log->page;
583 bp = log->bp;
584 lp = (struct logpage *) bp->l_ldata;
585 lspn = le32_to_cpu(lp->h.page);
586
587 LOGGC_LOCK(log);
588
589
590
591
592
593 if (list_empty(&log->cqueue))
594 tblk = NULL;
595 else
596 tblk = list_entry(log->cqueue.prev, struct tblock, cqueue);
597
598
599
600
601
602
603
604
605
606
607
608 if (tblk && tblk->pn == pn) {
609
610 tblk->flag |= tblkGC_EOP;
611
612 if (log->cflag & logGC_PAGEOUT) {
613
614
615
616
617
618
619 if (bp->l_wqnext == NULL)
620 lbmWrite(log, bp, 0, 0);
621 } else {
622
623
624
625 log->cflag |= logGC_PAGEOUT;
626 lmGCwrite(log, 0);
627 }
628 }
629
630
631
632 else {
633
634 bp->l_ceor = bp->l_eor;
635 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_ceor);
636 lbmWrite(log, bp, lbmWRITE | lbmRELEASE | lbmFREE, 0);
637 }
638 LOGGC_UNLOCK(log);
639
640
641
642
643
644
645
646 log->page = (pn == log->size - 1) ? 2 : pn + 1;
647 log->eor = LOGPHDRSIZE;
648
649
650 nextbp = lbmAllocate(log, log->page);
651 nextbp->l_eor = log->eor;
652 log->bp = nextbp;
653
654
655 lp = (struct logpage *) nextbp->l_ldata;
656 lp->h.page = lp->t.page = cpu_to_le32(lspn + 1);
657 lp->h.eor = lp->t.eor = cpu_to_le16(LOGPHDRSIZE);
658
659 return 0;
660}
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678int lmGroupCommit(struct jfs_log * log, struct tblock * tblk)
679{
680 int rc = 0;
681
682 LOGGC_LOCK(log);
683
684
685 if (tblk->flag & tblkGC_COMMITTED) {
686 if (tblk->flag & tblkGC_ERROR)
687 rc = -EIO;
688
689 LOGGC_UNLOCK(log);
690 return rc;
691 }
692 jfs_info("lmGroup Commit: tblk = 0x%p, gcrtc = %d", tblk, log->gcrtc);
693
694 if (tblk->xflag & COMMIT_LAZY)
695 tblk->flag |= tblkGC_LAZY;
696
697 if ((!(log->cflag & logGC_PAGEOUT)) && (!list_empty(&log->cqueue)) &&
698 (!(tblk->xflag & COMMIT_LAZY) || test_bit(log_FLUSH, &log->flag)
699 || jfs_tlocks_low)) {
700
701
702
703
704
705 log->cflag |= logGC_PAGEOUT;
706
707 lmGCwrite(log, 0);
708 }
709
710 if (tblk->xflag & COMMIT_LAZY) {
711
712
713
714 LOGGC_UNLOCK(log);
715 return 0;
716 }
717
718
719
720 if (tblk->flag & tblkGC_COMMITTED) {
721 if (tblk->flag & tblkGC_ERROR)
722 rc = -EIO;
723
724 LOGGC_UNLOCK(log);
725 return rc;
726 }
727
728
729
730 log->gcrtc++;
731 tblk->flag |= tblkGC_READY;
732
733 __SLEEP_COND(tblk->gcwait, (tblk->flag & tblkGC_COMMITTED),
734 LOGGC_LOCK(log), LOGGC_UNLOCK(log));
735
736
737 if (tblk->flag & tblkGC_ERROR)
738 rc = -EIO;
739
740 LOGGC_UNLOCK(log);
741 return rc;
742}
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757static void lmGCwrite(struct jfs_log * log, int cant_write)
758{
759 struct lbuf *bp;
760 struct logpage *lp;
761 int gcpn;
762 struct tblock *tblk;
763 struct tblock *xtblk = NULL;
764
765
766
767
768
769
770
771
772 gcpn = list_entry(log->cqueue.next, struct tblock, cqueue)->pn;
773
774 list_for_each_entry(tblk, &log->cqueue, cqueue) {
775 if (tblk->pn != gcpn)
776 break;
777
778 xtblk = tblk;
779
780
781 tblk->flag |= tblkGC_COMMIT;
782 }
783 tblk = xtblk;
784
785
786
787
788 bp = (struct lbuf *) tblk->bp;
789 lp = (struct logpage *) bp->l_ldata;
790
791 if (tblk->flag & tblkGC_EOP) {
792
793 tblk->flag &= ~tblkGC_EOP;
794 tblk->flag |= tblkGC_FREE;
795 bp->l_ceor = bp->l_eor;
796 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_ceor);
797 lbmWrite(log, bp, lbmWRITE | lbmRELEASE | lbmGC,
798 cant_write);
799 INCREMENT(lmStat.full_page);
800 }
801
802 else {
803 bp->l_ceor = tblk->eor;
804 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_ceor);
805 lbmWrite(log, bp, lbmWRITE | lbmGC, cant_write);
806 INCREMENT(lmStat.partial_page);
807 }
808}
809
810
811
812
813
814
815
816
817
818
819
820
821
822static void lmPostGC(struct lbuf * bp)
823{
824 unsigned long flags;
825 struct jfs_log *log = bp->l_log;
826 struct logpage *lp;
827 struct tblock *tblk, *temp;
828
829
830 spin_lock_irqsave(&log->gclock, flags);
831
832
833
834
835
836
837 list_for_each_entry_safe(tblk, temp, &log->cqueue, cqueue) {
838 if (!(tblk->flag & tblkGC_COMMIT))
839 break;
840
841
842
843
844
845 if (bp->l_flag & lbmERROR)
846 tblk->flag |= tblkGC_ERROR;
847
848
849 list_del(&tblk->cqueue);
850 tblk->flag &= ~tblkGC_QUEUE;
851
852 if (tblk == log->flush_tblk) {
853
854 clear_bit(log_FLUSH, &log->flag);
855 log->flush_tblk = NULL;
856 }
857
858 jfs_info("lmPostGC: tblk = 0x%p, flag = 0x%x", tblk,
859 tblk->flag);
860
861 if (!(tblk->xflag & COMMIT_FORCE))
862
863
864
865 txLazyUnlock(tblk);
866 else {
867
868 tblk->flag |= tblkGC_COMMITTED;
869
870 if (tblk->flag & tblkGC_READY)
871 log->gcrtc--;
872
873 LOGGC_WAKEUP(tblk);
874 }
875
876
877
878
879 if (tblk->flag & tblkGC_FREE)
880 lbmFree(bp);
881
882
883
884 else if (tblk->flag & tblkGC_EOP) {
885
886 lp = (struct logpage *) bp->l_ldata;
887 bp->l_ceor = bp->l_eor;
888 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_eor);
889 jfs_info("lmPostGC: calling lbmWrite");
890 lbmWrite(log, bp, lbmWRITE | lbmRELEASE | lbmFREE,
891 1);
892 }
893
894 }
895
896
897
898
899
900
901
902
903 if ((!list_empty(&log->cqueue)) &&
904 ((log->gcrtc > 0) || (tblk->bp->l_wqnext != NULL) ||
905 test_bit(log_FLUSH, &log->flag) || jfs_tlocks_low))
906
907
908
909 lmGCwrite(log, 1);
910
911
912
913
914
915
916 else
917 log->cflag &= ~logGC_PAGEOUT;
918
919
920 spin_unlock_irqrestore(&log->gclock, flags);
921 return;
922}
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941static int lmLogSync(struct jfs_log * log, int hard_sync)
942{
943 int logsize;
944 int written;
945 int free;
946 int delta;
947 int more;
948 struct lrd lrd;
949 int lsn;
950 struct logsyncblk *lp;
951 unsigned long flags;
952
953
954 if (hard_sync)
955 write_special_inodes(log, filemap_fdatawrite);
956 else
957 write_special_inodes(log, filemap_flush);
958
959
960
961
962
963
964
965
966 if (log->sync == log->syncpt) {
967 LOGSYNC_LOCK(log, flags);
968 if (list_empty(&log->synclist))
969 log->sync = log->lsn;
970 else {
971 lp = list_entry(log->synclist.next,
972 struct logsyncblk, synclist);
973 log->sync = lp->lsn;
974 }
975 LOGSYNC_UNLOCK(log, flags);
976
977 }
978
979
980
981
982
983 if (log->sync != log->syncpt) {
984 lrd.logtid = 0;
985 lrd.backchain = 0;
986 lrd.type = cpu_to_le16(LOG_SYNCPT);
987 lrd.length = 0;
988 lrd.log.syncpt.sync = cpu_to_le32(log->sync);
989 lsn = lmWriteRecord(log, NULL, &lrd, NULL);
990
991 log->syncpt = log->sync;
992 } else
993 lsn = log->lsn;
994
995
996
997
998 logsize = log->logsize;
999
1000 logdiff(written, lsn, log);
1001 free = logsize - written;
1002 delta = LOGSYNC_DELTA(logsize);
1003 more = min(free / 2, delta);
1004 if (more < 2 * LOGPSIZE) {
1005 jfs_warn("\n ... Log Wrap ... Log Wrap ... Log Wrap ...\n");
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025 log->syncpt = log->sync = lsn;
1026 log->nextsync = delta;
1027 } else
1028
1029 log->nextsync = written + more;
1030
1031
1032
1033
1034
1035
1036 if (!test_bit(log_SYNCBARRIER, &log->flag) &&
1037 (written > LOGSYNC_BARRIER(logsize)) && log->active) {
1038 set_bit(log_SYNCBARRIER, &log->flag);
1039 jfs_info("log barrier on: lsn=0x%x syncpt=0x%x", lsn,
1040 log->syncpt);
1041
1042
1043
1044 jfs_flush_journal(log, 0);
1045 }
1046
1047 return lsn;
1048}
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058void jfs_syncpt(struct jfs_log *log, int hard_sync)
1059{ LOG_LOCK(log);
1060 lmLogSync(log, hard_sync);
1061 LOG_UNLOCK(log);
1062}
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077int lmLogOpen(struct super_block *sb)
1078{
1079 int rc;
1080 struct block_device *bdev;
1081 struct jfs_log *log;
1082 struct jfs_sb_info *sbi = JFS_SBI(sb);
1083
1084 if (sbi->flag & JFS_NOINTEGRITY)
1085 return open_dummy_log(sb);
1086
1087 if (sbi->mntflag & JFS_INLINELOG)
1088 return open_inline_log(sb);
1089
1090 mutex_lock(&jfs_log_mutex);
1091 list_for_each_entry(log, &jfs_external_logs, journal_list) {
1092 if (log->bdev->bd_dev == sbi->logdev) {
1093 if (memcmp(log->uuid, sbi->loguuid,
1094 sizeof(log->uuid))) {
1095 jfs_warn("wrong uuid on JFS journal\n");
1096 mutex_unlock(&jfs_log_mutex);
1097 return -EINVAL;
1098 }
1099
1100
1101
1102 if ((rc = lmLogFileSystem(log, sbi, 1))) {
1103 mutex_unlock(&jfs_log_mutex);
1104 return rc;
1105 }
1106 goto journal_found;
1107 }
1108 }
1109
1110 if (!(log = kzalloc(sizeof(struct jfs_log), GFP_KERNEL))) {
1111 mutex_unlock(&jfs_log_mutex);
1112 return -ENOMEM;
1113 }
1114 INIT_LIST_HEAD(&log->sb_list);
1115 init_waitqueue_head(&log->syncwait);
1116
1117
1118
1119
1120
1121
1122
1123 bdev = blkdev_get_by_dev(sbi->logdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
1124 log);
1125 if (IS_ERR(bdev)) {
1126 rc = -PTR_ERR(bdev);
1127 goto free;
1128 }
1129
1130 log->bdev = bdev;
1131 memcpy(log->uuid, sbi->loguuid, sizeof(log->uuid));
1132
1133
1134
1135
1136 if ((rc = lmLogInit(log)))
1137 goto close;
1138
1139 list_add(&log->journal_list, &jfs_external_logs);
1140
1141
1142
1143
1144 if ((rc = lmLogFileSystem(log, sbi, 1)))
1145 goto shutdown;
1146
1147journal_found:
1148 LOG_LOCK(log);
1149 list_add(&sbi->log_list, &log->sb_list);
1150 sbi->log = log;
1151 LOG_UNLOCK(log);
1152
1153 mutex_unlock(&jfs_log_mutex);
1154 return 0;
1155
1156
1157
1158
1159 shutdown:
1160 list_del(&log->journal_list);
1161 lbmLogShutdown(log);
1162
1163 close:
1164 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
1165
1166 free:
1167 mutex_unlock(&jfs_log_mutex);
1168 kfree(log);
1169
1170 jfs_warn("lmLogOpen: exit(%d)", rc);
1171 return rc;
1172}
1173
1174static int open_inline_log(struct super_block *sb)
1175{
1176 struct jfs_log *log;
1177 int rc;
1178
1179 if (!(log = kzalloc(sizeof(struct jfs_log), GFP_KERNEL)))
1180 return -ENOMEM;
1181 INIT_LIST_HEAD(&log->sb_list);
1182 init_waitqueue_head(&log->syncwait);
1183
1184 set_bit(log_INLINELOG, &log->flag);
1185 log->bdev = sb->s_bdev;
1186 log->base = addressPXD(&JFS_SBI(sb)->logpxd);
1187 log->size = lengthPXD(&JFS_SBI(sb)->logpxd) >>
1188 (L2LOGPSIZE - sb->s_blocksize_bits);
1189 log->l2bsize = sb->s_blocksize_bits;
1190 ASSERT(L2LOGPSIZE >= sb->s_blocksize_bits);
1191
1192
1193
1194
1195 if ((rc = lmLogInit(log))) {
1196 kfree(log);
1197 jfs_warn("lmLogOpen: exit(%d)", rc);
1198 return rc;
1199 }
1200
1201 list_add(&JFS_SBI(sb)->log_list, &log->sb_list);
1202 JFS_SBI(sb)->log = log;
1203
1204 return rc;
1205}
1206
1207static int open_dummy_log(struct super_block *sb)
1208{
1209 int rc;
1210
1211 mutex_lock(&jfs_log_mutex);
1212 if (!dummy_log) {
1213 dummy_log = kzalloc(sizeof(struct jfs_log), GFP_KERNEL);
1214 if (!dummy_log) {
1215 mutex_unlock(&jfs_log_mutex);
1216 return -ENOMEM;
1217 }
1218 INIT_LIST_HEAD(&dummy_log->sb_list);
1219 init_waitqueue_head(&dummy_log->syncwait);
1220 dummy_log->no_integrity = 1;
1221
1222 dummy_log->base = 0;
1223 dummy_log->size = 1024;
1224 rc = lmLogInit(dummy_log);
1225 if (rc) {
1226 kfree(dummy_log);
1227 dummy_log = NULL;
1228 mutex_unlock(&jfs_log_mutex);
1229 return rc;
1230 }
1231 }
1232
1233 LOG_LOCK(dummy_log);
1234 list_add(&JFS_SBI(sb)->log_list, &dummy_log->sb_list);
1235 JFS_SBI(sb)->log = dummy_log;
1236 LOG_UNLOCK(dummy_log);
1237 mutex_unlock(&jfs_log_mutex);
1238
1239 return 0;
1240}
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260int lmLogInit(struct jfs_log * log)
1261{
1262 int rc = 0;
1263 struct lrd lrd;
1264 struct logsuper *logsuper;
1265 struct lbuf *bpsuper;
1266 struct lbuf *bp;
1267 struct logpage *lp;
1268 int lsn = 0;
1269
1270 jfs_info("lmLogInit: log:0x%p", log);
1271
1272
1273 LOGGC_LOCK_INIT(log);
1274
1275
1276 LOG_LOCK_INIT(log);
1277
1278 LOGSYNC_LOCK_INIT(log);
1279
1280 INIT_LIST_HEAD(&log->synclist);
1281
1282 INIT_LIST_HEAD(&log->cqueue);
1283 log->flush_tblk = NULL;
1284
1285 log->count = 0;
1286
1287
1288
1289
1290 if ((rc = lbmLogInit(log)))
1291 return rc;
1292
1293 if (!test_bit(log_INLINELOG, &log->flag))
1294 log->l2bsize = L2LOGPSIZE;
1295
1296
1297 if (log->no_integrity) {
1298
1299
1300
1301
1302
1303 bp = lbmAllocate(log , 0);
1304 log->bp = bp;
1305 bp->l_pn = bp->l_eor = 0;
1306 } else {
1307
1308
1309
1310 if ((rc = lbmRead(log, 1, &bpsuper)))
1311 goto errout10;
1312
1313 logsuper = (struct logsuper *) bpsuper->l_ldata;
1314
1315 if (logsuper->magic != cpu_to_le32(LOGMAGIC)) {
1316 jfs_warn("*** Log Format Error ! ***");
1317 rc = -EINVAL;
1318 goto errout20;
1319 }
1320
1321
1322 if (logsuper->state != cpu_to_le32(LOGREDONE)) {
1323 jfs_warn("*** Log Is Dirty ! ***");
1324 rc = -EINVAL;
1325 goto errout20;
1326 }
1327
1328
1329 if (test_bit(log_INLINELOG,&log->flag)) {
1330 if (log->size != le32_to_cpu(logsuper->size)) {
1331 rc = -EINVAL;
1332 goto errout20;
1333 }
1334 jfs_info("lmLogInit: inline log:0x%p base:0x%Lx "
1335 "size:0x%x", log,
1336 (unsigned long long) log->base, log->size);
1337 } else {
1338 if (memcmp(logsuper->uuid, log->uuid, 16)) {
1339 jfs_warn("wrong uuid on JFS log device");
1340 goto errout20;
1341 }
1342 log->size = le32_to_cpu(logsuper->size);
1343 log->l2bsize = le32_to_cpu(logsuper->l2bsize);
1344 jfs_info("lmLogInit: external log:0x%p base:0x%Lx "
1345 "size:0x%x", log,
1346 (unsigned long long) log->base, log->size);
1347 }
1348
1349 log->page = le32_to_cpu(logsuper->end) / LOGPSIZE;
1350 log->eor = le32_to_cpu(logsuper->end) - (LOGPSIZE * log->page);
1351
1352
1353
1354
1355
1356 if ((rc = lbmRead(log, log->page, &bp)))
1357 goto errout20;
1358
1359 lp = (struct logpage *) bp->l_ldata;
1360
1361 jfs_info("lmLogInit: lsn:0x%x page:%d eor:%d:%d",
1362 le32_to_cpu(logsuper->end), log->page, log->eor,
1363 le16_to_cpu(lp->h.eor));
1364
1365 log->bp = bp;
1366 bp->l_pn = log->page;
1367 bp->l_eor = log->eor;
1368
1369
1370 if (log->eor >= LOGPSIZE - LOGPTLRSIZE)
1371 lmNextPage(log);
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383 lrd.logtid = 0;
1384 lrd.backchain = 0;
1385 lrd.type = cpu_to_le16(LOG_SYNCPT);
1386 lrd.length = 0;
1387 lrd.log.syncpt.sync = 0;
1388 lsn = lmWriteRecord(log, NULL, &lrd, NULL);
1389 bp = log->bp;
1390 bp->l_ceor = bp->l_eor;
1391 lp = (struct logpage *) bp->l_ldata;
1392 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_eor);
1393 lbmWrite(log, bp, lbmWRITE | lbmSYNC, 0);
1394 if ((rc = lbmIOWait(bp, 0)))
1395 goto errout30;
1396
1397
1398
1399
1400 logsuper->state = cpu_to_le32(LOGMOUNT);
1401 log->serial = le32_to_cpu(logsuper->serial) + 1;
1402 logsuper->serial = cpu_to_le32(log->serial);
1403 lbmDirectWrite(log, bpsuper, lbmWRITE | lbmRELEASE | lbmSYNC);
1404 if ((rc = lbmIOWait(bpsuper, lbmFREE)))
1405 goto errout30;
1406 }
1407
1408
1409 log->logsize = (log->size - 2) << L2LOGPSIZE;
1410 log->lsn = lsn;
1411 log->syncpt = lsn;
1412 log->sync = log->syncpt;
1413 log->nextsync = LOGSYNC_DELTA(log->logsize);
1414
1415 jfs_info("lmLogInit: lsn:0x%x syncpt:0x%x sync:0x%x",
1416 log->lsn, log->syncpt, log->sync);
1417
1418
1419
1420
1421 log->clsn = lsn;
1422
1423 return 0;
1424
1425
1426
1427
1428 errout30:
1429 log->wqueue = NULL;
1430 bp->l_wqnext = NULL;
1431 lbmFree(bp);
1432
1433 errout20:
1434 lbmFree(bpsuper);
1435
1436 errout10:
1437 lbmLogShutdown(log);
1438
1439 jfs_warn("lmLogInit: exit(%d)", rc);
1440 return rc;
1441}
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456int lmLogClose(struct super_block *sb)
1457{
1458 struct jfs_sb_info *sbi = JFS_SBI(sb);
1459 struct jfs_log *log = sbi->log;
1460 struct block_device *bdev;
1461 int rc = 0;
1462
1463 jfs_info("lmLogClose: log:0x%p", log);
1464
1465 mutex_lock(&jfs_log_mutex);
1466 LOG_LOCK(log);
1467 list_del(&sbi->log_list);
1468 LOG_UNLOCK(log);
1469 sbi->log = NULL;
1470
1471
1472
1473
1474
1475 sync_blockdev(sb->s_bdev);
1476
1477 if (test_bit(log_INLINELOG, &log->flag)) {
1478
1479
1480
1481 rc = lmLogShutdown(log);
1482 kfree(log);
1483 goto out;
1484 }
1485
1486 if (!log->no_integrity)
1487 lmLogFileSystem(log, sbi, 0);
1488
1489 if (!list_empty(&log->sb_list))
1490 goto out;
1491
1492
1493
1494
1495
1496
1497
1498
1499 if (log->no_integrity)
1500 goto out;
1501
1502
1503
1504
1505 list_del(&log->journal_list);
1506 bdev = log->bdev;
1507 rc = lmLogShutdown(log);
1508
1509 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
1510
1511 kfree(log);
1512
1513 out:
1514 mutex_unlock(&jfs_log_mutex);
1515 jfs_info("lmLogClose: exit(%d)", rc);
1516 return rc;
1517}
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530void jfs_flush_journal(struct jfs_log *log, int wait)
1531{
1532 int i;
1533 struct tblock *target = NULL;
1534
1535
1536 if (!log)
1537 return;
1538
1539 jfs_info("jfs_flush_journal: log:0x%p wait=%d", log, wait);
1540
1541 LOGGC_LOCK(log);
1542
1543 if (!list_empty(&log->cqueue)) {
1544
1545
1546
1547
1548 target = list_entry(log->cqueue.prev, struct tblock, cqueue);
1549
1550 if (test_bit(log_FLUSH, &log->flag)) {
1551
1552
1553
1554
1555
1556
1557 if (log->flush_tblk)
1558 log->flush_tblk = target;
1559 } else {
1560
1561 log->flush_tblk = target;
1562 set_bit(log_FLUSH, &log->flag);
1563
1564
1565
1566
1567 if (!(log->cflag & logGC_PAGEOUT)) {
1568 log->cflag |= logGC_PAGEOUT;
1569 lmGCwrite(log, 0);
1570 }
1571 }
1572 }
1573 if ((wait > 1) || test_bit(log_SYNCBARRIER, &log->flag)) {
1574
1575 set_bit(log_FLUSH, &log->flag);
1576 log->flush_tblk = NULL;
1577 }
1578
1579 if (wait && target && !(target->flag & tblkGC_COMMITTED)) {
1580 DECLARE_WAITQUEUE(__wait, current);
1581
1582 add_wait_queue(&target->gcwait, &__wait);
1583 set_current_state(TASK_UNINTERRUPTIBLE);
1584 LOGGC_UNLOCK(log);
1585 schedule();
1586 __set_current_state(TASK_RUNNING);
1587 LOGGC_LOCK(log);
1588 remove_wait_queue(&target->gcwait, &__wait);
1589 }
1590 LOGGC_UNLOCK(log);
1591
1592 if (wait < 2)
1593 return;
1594
1595 write_special_inodes(log, filemap_fdatawrite);
1596
1597
1598
1599
1600
1601 if ((!list_empty(&log->cqueue)) || !list_empty(&log->synclist)) {
1602 for (i = 0; i < 200; i++) {
1603 msleep(250);
1604 write_special_inodes(log, filemap_fdatawrite);
1605 if (list_empty(&log->cqueue) &&
1606 list_empty(&log->synclist))
1607 break;
1608 }
1609 }
1610 assert(list_empty(&log->cqueue));
1611
1612#ifdef CONFIG_JFS_DEBUG
1613 if (!list_empty(&log->synclist)) {
1614 struct logsyncblk *lp;
1615
1616 printk(KERN_ERR "jfs_flush_journal: synclist not empty\n");
1617 list_for_each_entry(lp, &log->synclist, synclist) {
1618 if (lp->xflag & COMMIT_PAGE) {
1619 struct metapage *mp = (struct metapage *)lp;
1620 print_hex_dump(KERN_ERR, "metapage: ",
1621 DUMP_PREFIX_ADDRESS, 16, 4,
1622 mp, sizeof(struct metapage), 0);
1623 print_hex_dump(KERN_ERR, "page: ",
1624 DUMP_PREFIX_ADDRESS, 16,
1625 sizeof(long), mp->page,
1626 sizeof(struct page), 0);
1627 } else
1628 print_hex_dump(KERN_ERR, "tblock:",
1629 DUMP_PREFIX_ADDRESS, 16, 4,
1630 lp, sizeof(struct tblock), 0);
1631 }
1632 }
1633#else
1634 WARN_ON(!list_empty(&log->synclist));
1635#endif
1636 clear_bit(log_FLUSH, &log->flag);
1637}
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653int lmLogShutdown(struct jfs_log * log)
1654{
1655 int rc;
1656 struct lrd lrd;
1657 int lsn;
1658 struct logsuper *logsuper;
1659 struct lbuf *bpsuper;
1660 struct lbuf *bp;
1661 struct logpage *lp;
1662
1663 jfs_info("lmLogShutdown: log:0x%p", log);
1664
1665 jfs_flush_journal(log, 2);
1666
1667
1668
1669
1670
1671 lrd.logtid = 0;
1672 lrd.backchain = 0;
1673 lrd.type = cpu_to_le16(LOG_SYNCPT);
1674 lrd.length = 0;
1675 lrd.log.syncpt.sync = 0;
1676
1677 lsn = lmWriteRecord(log, NULL, &lrd, NULL);
1678 bp = log->bp;
1679 lp = (struct logpage *) bp->l_ldata;
1680 lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_eor);
1681 lbmWrite(log, log->bp, lbmWRITE | lbmRELEASE | lbmSYNC, 0);
1682 lbmIOWait(log->bp, lbmFREE);
1683 log->bp = NULL;
1684
1685
1686
1687
1688
1689
1690 if ((rc = lbmRead(log, 1, &bpsuper)))
1691 goto out;
1692
1693 logsuper = (struct logsuper *) bpsuper->l_ldata;
1694 logsuper->state = cpu_to_le32(LOGREDONE);
1695 logsuper->end = cpu_to_le32(lsn);
1696 lbmDirectWrite(log, bpsuper, lbmWRITE | lbmRELEASE | lbmSYNC);
1697 rc = lbmIOWait(bpsuper, lbmFREE);
1698
1699 jfs_info("lmLogShutdown: lsn:0x%x page:%d eor:%d",
1700 lsn, log->page, log->eor);
1701
1702 out:
1703
1704
1705
1706 lbmLogShutdown(log);
1707
1708 if (rc) {
1709 jfs_warn("lmLogShutdown: exit(%d)", rc);
1710 }
1711 return rc;
1712}
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
1730 int activate)
1731{
1732 int rc = 0;
1733 int i;
1734 struct logsuper *logsuper;
1735 struct lbuf *bpsuper;
1736 char *uuid = sbi->uuid;
1737
1738
1739
1740
1741 if ((rc = lbmRead(log, 1, &bpsuper)))
1742 return rc;
1743
1744 logsuper = (struct logsuper *) bpsuper->l_ldata;
1745 if (activate) {
1746 for (i = 0; i < MAX_ACTIVE; i++)
1747 if (!memcmp(logsuper->active[i].uuid, NULL_UUID, 16)) {
1748 memcpy(logsuper->active[i].uuid, uuid, 16);
1749 sbi->aggregate = i;
1750 break;
1751 }
1752 if (i == MAX_ACTIVE) {
1753 jfs_warn("Too many file systems sharing journal!");
1754 lbmFree(bpsuper);
1755 return -EMFILE;
1756 }
1757 } else {
1758 for (i = 0; i < MAX_ACTIVE; i++)
1759 if (!memcmp(logsuper->active[i].uuid, uuid, 16)) {
1760 memcpy(logsuper->active[i].uuid, NULL_UUID, 16);
1761 break;
1762 }
1763 if (i == MAX_ACTIVE) {
1764 jfs_warn("Somebody stomped on the journal!");
1765 lbmFree(bpsuper);
1766 return -EIO;
1767 }
1768
1769 }
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782 lbmDirectWrite(log, bpsuper, lbmWRITE | lbmRELEASE | lbmSYNC);
1783 rc = lbmIOWait(bpsuper, lbmFREE);
1784
1785 return rc;
1786}
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808static int lbmLogInit(struct jfs_log * log)
1809{
1810 int i;
1811 struct lbuf *lbuf;
1812
1813 jfs_info("lbmLogInit: log:0x%p", log);
1814
1815
1816 log->bp = NULL;
1817
1818
1819 log->wqueue = NULL;
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830 init_waitqueue_head(&log->free_wait);
1831
1832 log->lbuf_free = NULL;
1833
1834 for (i = 0; i < LOGPAGES;) {
1835 char *buffer;
1836 uint offset;
1837 struct page *page;
1838
1839 buffer = (char *) get_zeroed_page(GFP_KERNEL);
1840 if (buffer == NULL)
1841 goto error;
1842 page = virt_to_page(buffer);
1843 for (offset = 0; offset < PAGE_SIZE; offset += LOGPSIZE) {
1844 lbuf = kmalloc(sizeof(struct lbuf), GFP_KERNEL);
1845 if (lbuf == NULL) {
1846 if (offset == 0)
1847 free_page((unsigned long) buffer);
1848 goto error;
1849 }
1850 if (offset)
1851 get_page(page);
1852 lbuf->l_offset = offset;
1853 lbuf->l_ldata = buffer + offset;
1854 lbuf->l_page = page;
1855 lbuf->l_log = log;
1856 init_waitqueue_head(&lbuf->l_ioevent);
1857
1858 lbuf->l_freelist = log->lbuf_free;
1859 log->lbuf_free = lbuf;
1860 i++;
1861 }
1862 }
1863
1864 return (0);
1865
1866 error:
1867 lbmLogShutdown(log);
1868 return -ENOMEM;
1869}
1870
1871
1872
1873
1874
1875
1876
1877static void lbmLogShutdown(struct jfs_log * log)
1878{
1879 struct lbuf *lbuf;
1880
1881 jfs_info("lbmLogShutdown: log:0x%p", log);
1882
1883 lbuf = log->lbuf_free;
1884 while (lbuf) {
1885 struct lbuf *next = lbuf->l_freelist;
1886 __free_page(lbuf->l_page);
1887 kfree(lbuf);
1888 lbuf = next;
1889 }
1890}
1891
1892
1893
1894
1895
1896
1897
1898static struct lbuf *lbmAllocate(struct jfs_log * log, int pn)
1899{
1900 struct lbuf *bp;
1901 unsigned long flags;
1902
1903
1904
1905
1906 LCACHE_LOCK(flags);
1907 LCACHE_SLEEP_COND(log->free_wait, (bp = log->lbuf_free), flags);
1908 log->lbuf_free = bp->l_freelist;
1909 LCACHE_UNLOCK(flags);
1910
1911 bp->l_flag = 0;
1912
1913 bp->l_wqnext = NULL;
1914 bp->l_freelist = NULL;
1915
1916 bp->l_pn = pn;
1917 bp->l_blkno = log->base + (pn << (L2LOGPSIZE - log->l2bsize));
1918 bp->l_ceor = 0;
1919
1920 return bp;
1921}
1922
1923
1924
1925
1926
1927
1928
1929static void lbmFree(struct lbuf * bp)
1930{
1931 unsigned long flags;
1932
1933 LCACHE_LOCK(flags);
1934
1935 lbmfree(bp);
1936
1937 LCACHE_UNLOCK(flags);
1938}
1939
1940static void lbmfree(struct lbuf * bp)
1941{
1942 struct jfs_log *log = bp->l_log;
1943
1944 assert(bp->l_wqnext == NULL);
1945
1946
1947
1948
1949 bp->l_freelist = log->lbuf_free;
1950 log->lbuf_free = bp;
1951
1952 wake_up(&log->free_wait);
1953 return;
1954}
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968static inline void lbmRedrive(struct lbuf *bp)
1969{
1970 unsigned long flags;
1971
1972 spin_lock_irqsave(&log_redrive_lock, flags);
1973 bp->l_redrive_next = log_redrive_list;
1974 log_redrive_list = bp;
1975 spin_unlock_irqrestore(&log_redrive_lock, flags);
1976
1977 wake_up_process(jfsIOthread);
1978}
1979
1980
1981
1982
1983
1984static int lbmRead(struct jfs_log * log, int pn, struct lbuf ** bpp)
1985{
1986 struct bio *bio;
1987 struct lbuf *bp;
1988
1989
1990
1991
1992 *bpp = bp = lbmAllocate(log, pn);
1993 jfs_info("lbmRead: bp:0x%p pn:0x%x", bp, pn);
1994
1995 bp->l_flag |= lbmREAD;
1996
1997 bio = bio_alloc(GFP_NOFS, 1);
1998
1999 bio->bi_sector = bp->l_blkno << (log->l2bsize - 9);
2000 bio->bi_bdev = log->bdev;
2001 bio->bi_io_vec[0].bv_page = bp->l_page;
2002 bio->bi_io_vec[0].bv_len = LOGPSIZE;
2003 bio->bi_io_vec[0].bv_offset = bp->l_offset;
2004
2005 bio->bi_vcnt = 1;
2006 bio->bi_idx = 0;
2007 bio->bi_size = LOGPSIZE;
2008
2009 bio->bi_end_io = lbmIODone;
2010 bio->bi_private = bp;
2011 submit_bio(READ_SYNC, bio);
2012
2013 wait_event(bp->l_ioevent, (bp->l_flag != lbmREAD));
2014
2015 return 0;
2016}
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034static void lbmWrite(struct jfs_log * log, struct lbuf * bp, int flag,
2035 int cant_block)
2036{
2037 struct lbuf *tail;
2038 unsigned long flags;
2039
2040 jfs_info("lbmWrite: bp:0x%p flag:0x%x pn:0x%x", bp, flag, bp->l_pn);
2041
2042
2043 bp->l_blkno =
2044 log->base + (bp->l_pn << (L2LOGPSIZE - log->l2bsize));
2045
2046 LCACHE_LOCK(flags);
2047
2048
2049
2050
2051 bp->l_flag = flag;
2052
2053
2054
2055
2056
2057
2058
2059 tail = log->wqueue;
2060
2061
2062 if (bp->l_wqnext == NULL) {
2063
2064 if (tail == NULL) {
2065 log->wqueue = bp;
2066 bp->l_wqnext = bp;
2067 } else {
2068 log->wqueue = bp;
2069 bp->l_wqnext = tail->l_wqnext;
2070 tail->l_wqnext = bp;
2071 }
2072
2073 tail = bp;
2074 }
2075
2076
2077 if ((bp != tail->l_wqnext) || !(flag & lbmWRITE)) {
2078 LCACHE_UNLOCK(flags);
2079 return;
2080 }
2081
2082 LCACHE_UNLOCK(flags);
2083
2084 if (cant_block)
2085 lbmRedrive(bp);
2086 else if (flag & lbmSYNC)
2087 lbmStartIO(bp);
2088 else {
2089 LOGGC_UNLOCK(log);
2090 lbmStartIO(bp);
2091 LOGGC_LOCK(log);
2092 }
2093}
2094
2095
2096
2097
2098
2099
2100
2101
2102static void lbmDirectWrite(struct jfs_log * log, struct lbuf * bp, int flag)
2103{
2104 jfs_info("lbmDirectWrite: bp:0x%p flag:0x%x pn:0x%x",
2105 bp, flag, bp->l_pn);
2106
2107
2108
2109
2110 bp->l_flag = flag | lbmDIRECT;
2111
2112
2113 bp->l_blkno =
2114 log->base + (bp->l_pn << (L2LOGPSIZE - log->l2bsize));
2115
2116
2117
2118
2119 lbmStartIO(bp);
2120}
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132static void lbmStartIO(struct lbuf * bp)
2133{
2134 struct bio *bio;
2135 struct jfs_log *log = bp->l_log;
2136
2137 jfs_info("lbmStartIO\n");
2138
2139 bio = bio_alloc(GFP_NOFS, 1);
2140 bio->bi_sector = bp->l_blkno << (log->l2bsize - 9);
2141 bio->bi_bdev = log->bdev;
2142 bio->bi_io_vec[0].bv_page = bp->l_page;
2143 bio->bi_io_vec[0].bv_len = LOGPSIZE;
2144 bio->bi_io_vec[0].bv_offset = bp->l_offset;
2145
2146 bio->bi_vcnt = 1;
2147 bio->bi_idx = 0;
2148 bio->bi_size = LOGPSIZE;
2149
2150 bio->bi_end_io = lbmIODone;
2151 bio->bi_private = bp;
2152
2153
2154 if (log->no_integrity) {
2155 bio->bi_size = 0;
2156 lbmIODone(bio, 0);
2157 } else {
2158 submit_bio(WRITE_SYNC, bio);
2159 INCREMENT(lmStat.submitted);
2160 }
2161}
2162
2163
2164
2165
2166
2167static int lbmIOWait(struct lbuf * bp, int flag)
2168{
2169 unsigned long flags;
2170 int rc = 0;
2171
2172 jfs_info("lbmIOWait1: bp:0x%p flag:0x%x:0x%x", bp, bp->l_flag, flag);
2173
2174 LCACHE_LOCK(flags);
2175
2176 LCACHE_SLEEP_COND(bp->l_ioevent, (bp->l_flag & lbmDONE), flags);
2177
2178 rc = (bp->l_flag & lbmERROR) ? -EIO : 0;
2179
2180 if (flag & lbmFREE)
2181 lbmfree(bp);
2182
2183 LCACHE_UNLOCK(flags);
2184
2185 jfs_info("lbmIOWait2: bp:0x%p flag:0x%x:0x%x", bp, bp->l_flag, flag);
2186 return rc;
2187}
2188
2189
2190
2191
2192
2193
2194static void lbmIODone(struct bio *bio, int error)
2195{
2196 struct lbuf *bp = bio->bi_private;
2197 struct lbuf *nextbp, *tail;
2198 struct jfs_log *log;
2199 unsigned long flags;
2200
2201
2202
2203
2204 jfs_info("lbmIODone: bp:0x%p flag:0x%x", bp, bp->l_flag);
2205
2206 LCACHE_LOCK(flags);
2207
2208 bp->l_flag |= lbmDONE;
2209
2210 if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
2211 bp->l_flag |= lbmERROR;
2212
2213 jfs_err("lbmIODone: I/O error in JFS log");
2214 }
2215
2216 bio_put(bio);
2217
2218
2219
2220
2221 if (bp->l_flag & lbmREAD) {
2222 bp->l_flag &= ~lbmREAD;
2223
2224 LCACHE_UNLOCK(flags);
2225
2226
2227 LCACHE_WAKEUP(&bp->l_ioevent);
2228
2229 return;
2230 }
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244 bp->l_flag &= ~lbmWRITE;
2245 INCREMENT(lmStat.pagedone);
2246
2247
2248 log = bp->l_log;
2249 log->clsn = (bp->l_pn << L2LOGPSIZE) + bp->l_ceor;
2250
2251 if (bp->l_flag & lbmDIRECT) {
2252 LCACHE_WAKEUP(&bp->l_ioevent);
2253 LCACHE_UNLOCK(flags);
2254 return;
2255 }
2256
2257 tail = log->wqueue;
2258
2259
2260 if (bp == tail) {
2261
2262
2263
2264 if (bp->l_flag & lbmRELEASE) {
2265 log->wqueue = NULL;
2266 bp->l_wqnext = NULL;
2267 }
2268 }
2269
2270 else {
2271
2272
2273
2274 if (bp->l_flag & lbmRELEASE) {
2275 nextbp = tail->l_wqnext = bp->l_wqnext;
2276 bp->l_wqnext = NULL;
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288 if (nextbp->l_flag & lbmWRITE) {
2289
2290
2291
2292
2293 lbmRedrive(nextbp);
2294 }
2295 }
2296 }
2297
2298
2299
2300
2301
2302
2303
2304
2305 if (bp->l_flag & lbmSYNC) {
2306 LCACHE_UNLOCK(flags);
2307
2308
2309 LCACHE_WAKEUP(&bp->l_ioevent);
2310 }
2311
2312
2313
2314
2315 else if (bp->l_flag & lbmGC) {
2316 LCACHE_UNLOCK(flags);
2317 lmPostGC(bp);
2318 }
2319
2320
2321
2322
2323
2324
2325
2326 else {
2327 assert(bp->l_flag & lbmRELEASE);
2328 assert(bp->l_flag & lbmFREE);
2329 lbmfree(bp);
2330
2331 LCACHE_UNLOCK(flags);
2332 }
2333}
2334
2335int jfsIOWait(void *arg)
2336{
2337 struct lbuf *bp;
2338
2339 do {
2340 spin_lock_irq(&log_redrive_lock);
2341 while ((bp = log_redrive_list)) {
2342 log_redrive_list = bp->l_redrive_next;
2343 bp->l_redrive_next = NULL;
2344 spin_unlock_irq(&log_redrive_lock);
2345 lbmStartIO(bp);
2346 spin_lock_irq(&log_redrive_lock);
2347 }
2348
2349 if (freezing(current)) {
2350 spin_unlock_irq(&log_redrive_lock);
2351 refrigerator();
2352 } else {
2353 set_current_state(TASK_INTERRUPTIBLE);
2354 spin_unlock_irq(&log_redrive_lock);
2355 schedule();
2356 __set_current_state(TASK_RUNNING);
2357 }
2358 } while (!kthread_should_stop());
2359
2360 jfs_info("jfsIOWait being killed!");
2361 return 0;
2362}
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380int lmLogFormat(struct jfs_log *log, s64 logAddress, int logSize)
2381{
2382 int rc = -EIO;
2383 struct jfs_sb_info *sbi;
2384 struct logsuper *logsuper;
2385 struct logpage *lp;
2386 int lspn;
2387 struct lrd *lrd_ptr;
2388 int npages = 0;
2389 struct lbuf *bp;
2390
2391 jfs_info("lmLogFormat: logAddress:%Ld logSize:%d",
2392 (long long)logAddress, logSize);
2393
2394 sbi = list_entry(log->sb_list.next, struct jfs_sb_info, log_list);
2395
2396
2397 bp = lbmAllocate(log, 1);
2398
2399 npages = logSize >> sbi->l2nbperpage;
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413 logsuper = (struct logsuper *) bp->l_ldata;
2414
2415 logsuper->magic = cpu_to_le32(LOGMAGIC);
2416 logsuper->version = cpu_to_le32(LOGVERSION);
2417 logsuper->state = cpu_to_le32(LOGREDONE);
2418 logsuper->flag = cpu_to_le32(sbi->mntflag);
2419 logsuper->size = cpu_to_le32(npages);
2420 logsuper->bsize = cpu_to_le32(sbi->bsize);
2421 logsuper->l2bsize = cpu_to_le32(sbi->l2bsize);
2422 logsuper->end = cpu_to_le32(2 * LOGPSIZE + LOGPHDRSIZE + LOGRDSIZE);
2423
2424 bp->l_flag = lbmWRITE | lbmSYNC | lbmDIRECT;
2425 bp->l_blkno = logAddress + sbi->nbperpage;
2426 lbmStartIO(bp);
2427 if ((rc = lbmIOWait(bp, 0)))
2428 goto exit;
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452 lp = (struct logpage *) bp->l_ldata;
2453
2454
2455
2456
2457 lp->h.page = lp->t.page = cpu_to_le32(npages - 3);
2458 lp->h.eor = lp->t.eor = cpu_to_le16(LOGPHDRSIZE + LOGRDSIZE);
2459
2460 lrd_ptr = (struct lrd *) &lp->data;
2461 lrd_ptr->logtid = 0;
2462 lrd_ptr->backchain = 0;
2463 lrd_ptr->type = cpu_to_le16(LOG_SYNCPT);
2464 lrd_ptr->length = 0;
2465 lrd_ptr->log.syncpt.sync = 0;
2466
2467 bp->l_blkno += sbi->nbperpage;
2468 bp->l_flag = lbmWRITE | lbmSYNC | lbmDIRECT;
2469 lbmStartIO(bp);
2470 if ((rc = lbmIOWait(bp, 0)))
2471 goto exit;
2472
2473
2474
2475
2476 for (lspn = 0; lspn < npages - 3; lspn++) {
2477 lp->h.page = lp->t.page = cpu_to_le32(lspn);
2478 lp->h.eor = lp->t.eor = cpu_to_le16(LOGPHDRSIZE);
2479
2480 bp->l_blkno += sbi->nbperpage;
2481 bp->l_flag = lbmWRITE | lbmSYNC | lbmDIRECT;
2482 lbmStartIO(bp);
2483 if ((rc = lbmIOWait(bp, 0)))
2484 goto exit;
2485 }
2486
2487 rc = 0;
2488exit:
2489
2490
2491
2492
2493 lbmFree(bp);
2494
2495 return rc;
2496}
2497
2498#ifdef CONFIG_JFS_STATISTICS
2499static int jfs_lmstats_proc_show(struct seq_file *m, void *v)
2500{
2501 seq_printf(m,
2502 "JFS Logmgr stats\n"
2503 "================\n"
2504 "commits = %d\n"
2505 "writes submitted = %d\n"
2506 "writes completed = %d\n"
2507 "full pages submitted = %d\n"
2508 "partial pages submitted = %d\n",
2509 lmStat.commit,
2510 lmStat.submitted,
2511 lmStat.pagedone,
2512 lmStat.full_page,
2513 lmStat.partial_page);
2514 return 0;
2515}
2516
2517static int jfs_lmstats_proc_open(struct inode *inode, struct file *file)
2518{
2519 return single_open(file, jfs_lmstats_proc_show, NULL);
2520}
2521
2522const struct file_operations jfs_lmstats_proc_fops = {
2523 .owner = THIS_MODULE,
2524 .open = jfs_lmstats_proc_open,
2525 .read = seq_read,
2526 .llseek = seq_lseek,
2527 .release = single_release,
2528};
2529#endif
2530