2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_types.h"
24 #include "xfs_trans.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_error.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_inode_item.h"
40 #include "xfs_alloc.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_log_priv.h"
43 #include "xfs_buf_item.h"
44 #include "xfs_log_recover.h"
45 #include "xfs_extfree_item.h"
46 #include "xfs_trans_priv.h"
47 #include "xfs_quota.h"
50 STATIC int xlog_find_zeroed(xlog_t *, xfs_daddr_t *);
51 STATIC int xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t);
52 STATIC void xlog_recover_insert_item_backq(xlog_recover_item_t **q,
53 xlog_recover_item_t *item);
55 STATIC void xlog_recover_check_summary(xlog_t *);
56 STATIC void xlog_recover_check_ail(xfs_mount_t *, xfs_log_item_t *, int);
58 #define xlog_recover_check_summary(log)
59 #define xlog_recover_check_ail(mp, lip, gen)
64 * Sector aligned buffer routines for buffer create/read/write/access
67 #define XLOG_SECTOR_ROUNDUP_BBCOUNT(log, bbs) \
68 ( ((log)->l_sectbb_mask && (bbs & (log)->l_sectbb_mask)) ? \
69 ((bbs + (log)->l_sectbb_mask + 1) & ~(log)->l_sectbb_mask) : (bbs) )
70 #define XLOG_SECTOR_ROUNDDOWN_BLKNO(log, bno) ((bno) & ~(log)->l_sectbb_mask)
77 ASSERT(num_bblks > 0);
79 if (log->l_sectbb_log) {
81 num_bblks += XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1);
82 num_bblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, num_bblks);
84 return xfs_buf_get_noaddr(BBTOB(num_bblks), log->l_mp->m_logdev_targp);
96 * nbblks should be uint, but oh well. Just want to catch that 32-bit length.
107 if (log->l_sectbb_log) {
108 blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no);
109 nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks);
113 ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp));
116 XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no);
119 XFS_BUF_SET_COUNT(bp, BBTOB(nbblks));
120 XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp);
122 xfsbdstrat(log->l_mp, bp);
123 if ((error = xfs_iowait(bp)))
124 xfs_ioerror_alert("xlog_bread", log->l_mp,
125 bp, XFS_BUF_ADDR(bp));
130 * Write out the buffer at the given block for the given number of blocks.
131 * The buffer is kept locked across the write and is returned locked.
132 * This can only be used for synchronous log writes.
143 if (log->l_sectbb_log) {
144 blk_no = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, blk_no);
145 nbblks = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, nbblks);
149 ASSERT(BBTOB(nbblks) <= XFS_BUF_SIZE(bp));
151 XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no);
152 XFS_BUF_ZEROFLAGS(bp);
155 XFS_BUF_PSEMA(bp, PRIBIO);
156 XFS_BUF_SET_COUNT(bp, BBTOB(nbblks));
157 XFS_BUF_SET_TARGET(bp, log->l_mp->m_logdev_targp);
159 if ((error = xfs_bwrite(log->l_mp, bp)))
160 xfs_ioerror_alert("xlog_bwrite", log->l_mp,
161 bp, XFS_BUF_ADDR(bp));
174 if (!log->l_sectbb_log)
175 return XFS_BUF_PTR(bp);
177 ptr = XFS_BUF_PTR(bp) + BBTOB((int)blk_no & log->l_sectbb_mask);
178 ASSERT(XFS_BUF_SIZE(bp) >=
179 BBTOB(nbblks + (blk_no & log->l_sectbb_mask)));
185 * dump debug superblock and log record information
188 xlog_header_check_dump(
190 xlog_rec_header_t *head)
194 cmn_err(CE_DEBUG, "%s: SB : uuid = ", __FUNCTION__);
195 for (b = 0; b < 16; b++)
196 cmn_err(CE_DEBUG, "%02x", ((uchar_t *)&mp->m_sb.sb_uuid)[b]);
197 cmn_err(CE_DEBUG, ", fmt = %d\n", XLOG_FMT);
198 cmn_err(CE_DEBUG, " log : uuid = ");
199 for (b = 0; b < 16; b++)
200 cmn_err(CE_DEBUG, "%02x",((uchar_t *)&head->h_fs_uuid)[b]);
201 cmn_err(CE_DEBUG, ", fmt = %d\n", INT_GET(head->h_fmt, ARCH_CONVERT));
204 #define xlog_header_check_dump(mp, head)
208 * check log record header for recovery
211 xlog_header_check_recover(
213 xlog_rec_header_t *head)
215 ASSERT(INT_GET(head->h_magicno, ARCH_CONVERT) == XLOG_HEADER_MAGIC_NUM);
218 * IRIX doesn't write the h_fmt field and leaves it zeroed
219 * (XLOG_FMT_UNKNOWN). This stops us from trying to recover
220 * a dirty log created in IRIX.
222 if (unlikely(INT_GET(head->h_fmt, ARCH_CONVERT) != XLOG_FMT)) {
224 "XFS: dirty log written in incompatible format - can't recover");
225 xlog_header_check_dump(mp, head);
226 XFS_ERROR_REPORT("xlog_header_check_recover(1)",
227 XFS_ERRLEVEL_HIGH, mp);
228 return XFS_ERROR(EFSCORRUPTED);
229 } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) {
231 "XFS: dirty log entry has mismatched uuid - can't recover");
232 xlog_header_check_dump(mp, head);
233 XFS_ERROR_REPORT("xlog_header_check_recover(2)",
234 XFS_ERRLEVEL_HIGH, mp);
235 return XFS_ERROR(EFSCORRUPTED);
241 * read the head block of the log and check the header
244 xlog_header_check_mount(
246 xlog_rec_header_t *head)
248 ASSERT(INT_GET(head->h_magicno, ARCH_CONVERT) == XLOG_HEADER_MAGIC_NUM);
250 if (uuid_is_nil(&head->h_fs_uuid)) {
252 * IRIX doesn't write the h_fs_uuid or h_fmt fields. If
253 * h_fs_uuid is nil, we assume this log was last mounted
254 * by IRIX and continue.
256 xlog_warn("XFS: nil uuid in log - IRIX style log");
257 } else if (unlikely(!uuid_equal(&mp->m_sb.sb_uuid, &head->h_fs_uuid))) {
258 xlog_warn("XFS: log has mismatched uuid - can't recover");
259 xlog_header_check_dump(mp, head);
260 XFS_ERROR_REPORT("xlog_header_check_mount",
261 XFS_ERRLEVEL_HIGH, mp);
262 return XFS_ERROR(EFSCORRUPTED);
273 ASSERT(XFS_BUF_FSPRIVATE(bp, void *));
275 if (XFS_BUF_GETERROR(bp)) {
277 * We're not going to bother about retrying
278 * this during recovery. One strike!
280 mp = XFS_BUF_FSPRIVATE(bp, xfs_mount_t *);
281 xfs_ioerror_alert("xlog_recover_iodone",
282 mp, bp, XFS_BUF_ADDR(bp));
283 xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
285 XFS_BUF_SET_FSPRIVATE(bp, NULL);
286 XFS_BUF_CLR_IODONE_FUNC(bp);
291 * This routine finds (to an approximation) the first block in the physical
292 * log which contains the given cycle. It uses a binary search algorithm.
293 * Note that the algorithm can not be perfect because the disk will not
294 * necessarily be perfect.
297 xlog_find_cycle_start(
300 xfs_daddr_t first_blk,
301 xfs_daddr_t *last_blk,
309 mid_blk = BLK_AVG(first_blk, *last_blk);
310 while (mid_blk != first_blk && mid_blk != *last_blk) {
311 if ((error = xlog_bread(log, mid_blk, 1, bp)))
313 offset = xlog_align(log, mid_blk, 1, bp);
314 mid_cycle = GET_CYCLE(offset, ARCH_CONVERT);
315 if (mid_cycle == cycle) {
317 /* last_half_cycle == mid_cycle */
320 /* first_half_cycle == mid_cycle */
322 mid_blk = BLK_AVG(first_blk, *last_blk);
324 ASSERT((mid_blk == first_blk && mid_blk+1 == *last_blk) ||
325 (mid_blk == *last_blk && mid_blk-1 == first_blk));
331 * Check that the range of blocks does not contain the cycle number
332 * given. The scan needs to occur from front to back and the ptr into the
333 * region must be updated since a later routine will need to perform another
334 * test. If the region is completely good, we end up returning the same
337 * Set blkno to -1 if we encounter no errors. This is an invalid block number
338 * since we don't ever expect logs to get this large.
341 xlog_find_verify_cycle(
343 xfs_daddr_t start_blk,
345 uint stop_on_cycle_no,
346 xfs_daddr_t *new_blk)
352 xfs_caddr_t buf = NULL;
355 bufblks = 1 << ffs(nbblks);
357 while (!(bp = xlog_get_bp(log, bufblks))) {
358 /* can't get enough memory to do everything in one big buffer */
360 if (bufblks <= log->l_sectbb_log)
364 for (i = start_blk; i < start_blk + nbblks; i += bufblks) {
367 bcount = min(bufblks, (start_blk + nbblks - i));
369 if ((error = xlog_bread(log, i, bcount, bp)))
372 buf = xlog_align(log, i, bcount, bp);
373 for (j = 0; j < bcount; j++) {
374 cycle = GET_CYCLE(buf, ARCH_CONVERT);
375 if (cycle == stop_on_cycle_no) {
392 * Potentially backup over partial log record write.
394 * In the typical case, last_blk is the number of the block directly after
395 * a good log record. Therefore, we subtract one to get the block number
396 * of the last block in the given buffer. extra_bblks contains the number
397 * of blocks we would have read on a previous read. This happens when the
398 * last log record is split over the end of the physical log.
400 * extra_bblks is the number of blocks potentially verified on a previous
401 * call to this routine.
404 xlog_find_verify_log_record(
406 xfs_daddr_t start_blk,
407 xfs_daddr_t *last_blk,
412 xfs_caddr_t offset = NULL;
413 xlog_rec_header_t *head = NULL;
416 int num_blks = *last_blk - start_blk;
419 ASSERT(start_blk != 0 || *last_blk != start_blk);
421 if (!(bp = xlog_get_bp(log, num_blks))) {
422 if (!(bp = xlog_get_bp(log, 1)))
426 if ((error = xlog_bread(log, start_blk, num_blks, bp)))
428 offset = xlog_align(log, start_blk, num_blks, bp);
429 offset += ((num_blks - 1) << BBSHIFT);
432 for (i = (*last_blk) - 1; i >= 0; i--) {
434 /* valid log record not found */
436 "XFS: Log inconsistent (didn't find previous header)");
438 error = XFS_ERROR(EIO);
443 if ((error = xlog_bread(log, i, 1, bp)))
445 offset = xlog_align(log, i, 1, bp);
448 head = (xlog_rec_header_t *)offset;
450 if (XLOG_HEADER_MAGIC_NUM ==
451 INT_GET(head->h_magicno, ARCH_CONVERT))
459 * We hit the beginning of the physical log & still no header. Return
460 * to caller. If caller can handle a return of -1, then this routine
461 * will be called again for the end of the physical log.
469 * We have the final block of the good log (the first block
470 * of the log record _before_ the head. So we check the uuid.
472 if ((error = xlog_header_check_mount(log->l_mp, head)))
476 * We may have found a log record header before we expected one.
477 * last_blk will be the 1st block # with a given cycle #. We may end
478 * up reading an entire log record. In this case, we don't want to
479 * reset last_blk. Only when last_blk points in the middle of a log
480 * record do we update last_blk.
482 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
483 uint h_size = INT_GET(head->h_size, ARCH_CONVERT);
485 xhdrs = h_size / XLOG_HEADER_CYCLE_SIZE;
486 if (h_size % XLOG_HEADER_CYCLE_SIZE)
492 if (*last_blk - i + extra_bblks
493 != BTOBB(INT_GET(head->h_len, ARCH_CONVERT)) + xhdrs)
502 * Head is defined to be the point of the log where the next log write
503 * write could go. This means that incomplete LR writes at the end are
504 * eliminated when calculating the head. We aren't guaranteed that previous
505 * LR have complete transactions. We only know that a cycle number of
506 * current cycle number -1 won't be present in the log if we start writing
507 * from our current block number.
509 * last_blk contains the block number of the first block with a given
512 * Return: zero if normal, non-zero if error.
517 xfs_daddr_t *return_head_blk)
521 xfs_daddr_t new_blk, first_blk, start_blk, last_blk, head_blk;
523 uint first_half_cycle, last_half_cycle;
525 int error, log_bbnum = log->l_logBBsize;
527 /* Is the end of the log device zeroed? */
528 if ((error = xlog_find_zeroed(log, &first_blk)) == -1) {
529 *return_head_blk = first_blk;
531 /* Is the whole lot zeroed? */
533 /* Linux XFS shouldn't generate totally zeroed logs -
534 * mkfs etc write a dummy unmount record to a fresh
535 * log so we can store the uuid in there
537 xlog_warn("XFS: totally zeroed log");
542 xlog_warn("XFS: empty log check failed");
546 first_blk = 0; /* get cycle # of 1st block */
547 bp = xlog_get_bp(log, 1);
550 if ((error = xlog_bread(log, 0, 1, bp)))
552 offset = xlog_align(log, 0, 1, bp);
553 first_half_cycle = GET_CYCLE(offset, ARCH_CONVERT);
555 last_blk = head_blk = log_bbnum - 1; /* get cycle # of last block */
556 if ((error = xlog_bread(log, last_blk, 1, bp)))
558 offset = xlog_align(log, last_blk, 1, bp);
559 last_half_cycle = GET_CYCLE(offset, ARCH_CONVERT);
560 ASSERT(last_half_cycle != 0);
563 * If the 1st half cycle number is equal to the last half cycle number,
564 * then the entire log is stamped with the same cycle number. In this
565 * case, head_blk can't be set to zero (which makes sense). The below
566 * math doesn't work out properly with head_blk equal to zero. Instead,
567 * we set it to log_bbnum which is an invalid block number, but this
568 * value makes the math correct. If head_blk doesn't changed through
569 * all the tests below, *head_blk is set to zero at the very end rather
570 * than log_bbnum. In a sense, log_bbnum and zero are the same block
571 * in a circular file.
573 if (first_half_cycle == last_half_cycle) {
575 * In this case we believe that the entire log should have
576 * cycle number last_half_cycle. We need to scan backwards
577 * from the end verifying that there are no holes still
578 * containing last_half_cycle - 1. If we find such a hole,
579 * then the start of that hole will be the new head. The
580 * simple case looks like
581 * x | x ... | x - 1 | x
582 * Another case that fits this picture would be
583 * x | x + 1 | x ... | x
584 * In this case the head really is somewhere at the end of the
585 * log, as one of the latest writes at the beginning was
588 * x | x + 1 | x ... | x - 1 | x
589 * This is really the combination of the above two cases, and
590 * the head has to end up at the start of the x-1 hole at the
593 * In the 256k log case, we will read from the beginning to the
594 * end of the log and search for cycle numbers equal to x-1.
595 * We don't worry about the x+1 blocks that we encounter,
596 * because we know that they cannot be the head since the log
599 head_blk = log_bbnum;
600 stop_on_cycle = last_half_cycle - 1;
603 * In this case we want to find the first block with cycle
604 * number matching last_half_cycle. We expect the log to be
607 * The first block with cycle number x (last_half_cycle) will
608 * be where the new head belongs. First we do a binary search
609 * for the first occurrence of last_half_cycle. The binary
610 * search may not be totally accurate, so then we scan back
611 * from there looking for occurrences of last_half_cycle before
612 * us. If that backwards scan wraps around the beginning of
613 * the log, then we look for occurrences of last_half_cycle - 1
614 * at the end of the log. The cases we're looking for look
616 * x + 1 ... | x | x + 1 | x ...
617 * ^ binary search stopped here
619 * x + 1 ... | x ... | x - 1 | x
620 * <---------> less than scan distance
622 stop_on_cycle = last_half_cycle;
623 if ((error = xlog_find_cycle_start(log, bp, first_blk,
624 &head_blk, last_half_cycle)))
629 * Now validate the answer. Scan back some number of maximum possible
630 * blocks and make sure each one has the expected cycle number. The
631 * maximum is determined by the total possible amount of buffering
632 * in the in-core log. The following number can be made tighter if
633 * we actually look at the block size of the filesystem.
635 num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log);
636 if (head_blk >= num_scan_bblks) {
638 * We are guaranteed that the entire check can be performed
641 start_blk = head_blk - num_scan_bblks;
642 if ((error = xlog_find_verify_cycle(log,
643 start_blk, num_scan_bblks,
644 stop_on_cycle, &new_blk)))
648 } else { /* need to read 2 parts of log */
650 * We are going to scan backwards in the log in two parts.
651 * First we scan the physical end of the log. In this part
652 * of the log, we are looking for blocks with cycle number
653 * last_half_cycle - 1.
654 * If we find one, then we know that the log starts there, as
655 * we've found a hole that didn't get written in going around
656 * the end of the physical log. The simple case for this is
657 * x + 1 ... | x ... | x - 1 | x
658 * <---------> less than scan distance
659 * If all of the blocks at the end of the log have cycle number
660 * last_half_cycle, then we check the blocks at the start of
661 * the log looking for occurrences of last_half_cycle. If we
662 * find one, then our current estimate for the location of the
663 * first occurrence of last_half_cycle is wrong and we move
664 * back to the hole we've found. This case looks like
665 * x + 1 ... | x | x + 1 | x ...
666 * ^ binary search stopped here
667 * Another case we need to handle that only occurs in 256k
669 * x + 1 ... | x ... | x+1 | x ...
670 * ^ binary search stops here
671 * In a 256k log, the scan at the end of the log will see the
672 * x + 1 blocks. We need to skip past those since that is
673 * certainly not the head of the log. By searching for
674 * last_half_cycle-1 we accomplish that.
676 start_blk = log_bbnum - num_scan_bblks + head_blk;
677 ASSERT(head_blk <= INT_MAX &&
678 (xfs_daddr_t) num_scan_bblks - head_blk >= 0);
679 if ((error = xlog_find_verify_cycle(log, start_blk,
680 num_scan_bblks - (int)head_blk,
681 (stop_on_cycle - 1), &new_blk)))
689 * Scan beginning of log now. The last part of the physical
690 * log is good. This scan needs to verify that it doesn't find
691 * the last_half_cycle.
694 ASSERT(head_blk <= INT_MAX);
695 if ((error = xlog_find_verify_cycle(log,
696 start_blk, (int)head_blk,
697 stop_on_cycle, &new_blk)))
705 * Now we need to make sure head_blk is not pointing to a block in
706 * the middle of a log record.
708 num_scan_bblks = XLOG_REC_SHIFT(log);
709 if (head_blk >= num_scan_bblks) {
710 start_blk = head_blk - num_scan_bblks; /* don't read head_blk */
712 /* start ptr at last block ptr before head_blk */
713 if ((error = xlog_find_verify_log_record(log, start_blk,
714 &head_blk, 0)) == -1) {
715 error = XFS_ERROR(EIO);
721 ASSERT(head_blk <= INT_MAX);
722 if ((error = xlog_find_verify_log_record(log, start_blk,
723 &head_blk, 0)) == -1) {
724 /* We hit the beginning of the log during our search */
725 start_blk = log_bbnum - num_scan_bblks + head_blk;
727 ASSERT(start_blk <= INT_MAX &&
728 (xfs_daddr_t) log_bbnum-start_blk >= 0);
729 ASSERT(head_blk <= INT_MAX);
730 if ((error = xlog_find_verify_log_record(log,
732 (int)head_blk)) == -1) {
733 error = XFS_ERROR(EIO);
737 if (new_blk != log_bbnum)
744 if (head_blk == log_bbnum)
745 *return_head_blk = 0;
747 *return_head_blk = head_blk;
749 * When returning here, we have a good block number. Bad block
750 * means that during a previous crash, we didn't have a clean break
751 * from cycle number N to cycle number N-1. In this case, we need
752 * to find the first block with cycle number N-1.
760 xlog_warn("XFS: failed to find log head");
765 * Find the sync block number or the tail of the log.
767 * This will be the block number of the last record to have its
768 * associated buffers synced to disk. Every log record header has
769 * a sync lsn embedded in it. LSNs hold block numbers, so it is easy
770 * to get a sync block number. The only concern is to figure out which
771 * log record header to believe.
773 * The following algorithm uses the log record header with the largest
774 * lsn. The entire log record does not need to be valid. We only care
775 * that the header is valid.
777 * We could speed up search by using current head_blk buffer, but it is not
783 xfs_daddr_t *head_blk,
784 xfs_daddr_t *tail_blk)
786 xlog_rec_header_t *rhead;
787 xlog_op_header_t *op_head;
788 xfs_caddr_t offset = NULL;
791 xfs_daddr_t umount_data_blk;
792 xfs_daddr_t after_umount_blk;
799 * Find previous log record
801 if ((error = xlog_find_head(log, head_blk)))
804 bp = xlog_get_bp(log, 1);
807 if (*head_blk == 0) { /* special case */
808 if ((error = xlog_bread(log, 0, 1, bp)))
810 offset = xlog_align(log, 0, 1, bp);
811 if (GET_CYCLE(offset, ARCH_CONVERT) == 0) {
813 /* leave all other log inited values alone */
819 * Search backwards looking for log record header block
821 ASSERT(*head_blk < INT_MAX);
822 for (i = (int)(*head_blk) - 1; i >= 0; i--) {
823 if ((error = xlog_bread(log, i, 1, bp)))
825 offset = xlog_align(log, i, 1, bp);
826 if (XLOG_HEADER_MAGIC_NUM ==
827 INT_GET(*(uint *)offset, ARCH_CONVERT)) {
833 * If we haven't found the log record header block, start looking
834 * again from the end of the physical log. XXXmiken: There should be
835 * a check here to make sure we didn't search more than N blocks in
839 for (i = log->l_logBBsize - 1; i >= (int)(*head_blk); i--) {
840 if ((error = xlog_bread(log, i, 1, bp)))
842 offset = xlog_align(log, i, 1, bp);
843 if (XLOG_HEADER_MAGIC_NUM ==
844 INT_GET(*(uint*)offset, ARCH_CONVERT)) {
851 xlog_warn("XFS: xlog_find_tail: couldn't find sync record");
853 return XFS_ERROR(EIO);
856 /* find blk_no of tail of log */
857 rhead = (xlog_rec_header_t *)offset;
858 *tail_blk = BLOCK_LSN(INT_GET(rhead->h_tail_lsn, ARCH_CONVERT));
861 * Reset log values according to the state of the log when we
862 * crashed. In the case where head_blk == 0, we bump curr_cycle
863 * one because the next write starts a new cycle rather than
864 * continuing the cycle of the last good log record. At this
865 * point we have guaranteed that all partial log records have been
866 * accounted for. Therefore, we know that the last good log record
867 * written was complete and ended exactly on the end boundary
868 * of the physical log.
870 log->l_prev_block = i;
871 log->l_curr_block = (int)*head_blk;
872 log->l_curr_cycle = INT_GET(rhead->h_cycle, ARCH_CONVERT);
875 log->l_tail_lsn = INT_GET(rhead->h_tail_lsn, ARCH_CONVERT);
876 log->l_last_sync_lsn = INT_GET(rhead->h_lsn, ARCH_CONVERT);
877 log->l_grant_reserve_cycle = log->l_curr_cycle;
878 log->l_grant_reserve_bytes = BBTOB(log->l_curr_block);
879 log->l_grant_write_cycle = log->l_curr_cycle;
880 log->l_grant_write_bytes = BBTOB(log->l_curr_block);
883 * Look for unmount record. If we find it, then we know there
884 * was a clean unmount. Since 'i' could be the last block in
885 * the physical log, we convert to a log block before comparing
888 * Save the current tail lsn to use to pass to
889 * xlog_clear_stale_blocks() below. We won't want to clear the
890 * unmount record if there is one, so we pass the lsn of the
891 * unmount record rather than the block after it.
893 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
894 int h_size = INT_GET(rhead->h_size, ARCH_CONVERT);
895 int h_version = INT_GET(rhead->h_version, ARCH_CONVERT);
897 if ((h_version & XLOG_VERSION_2) &&
898 (h_size > XLOG_HEADER_CYCLE_SIZE)) {
899 hblks = h_size / XLOG_HEADER_CYCLE_SIZE;
900 if (h_size % XLOG_HEADER_CYCLE_SIZE)
908 after_umount_blk = (i + hblks + (int)
909 BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT))) % log->l_logBBsize;
910 tail_lsn = log->l_tail_lsn;
911 if (*head_blk == after_umount_blk &&
912 INT_GET(rhead->h_num_logops, ARCH_CONVERT) == 1) {
913 umount_data_blk = (i + hblks) % log->l_logBBsize;
914 if ((error = xlog_bread(log, umount_data_blk, 1, bp))) {
917 offset = xlog_align(log, umount_data_blk, 1, bp);
918 op_head = (xlog_op_header_t *)offset;
919 if (op_head->oh_flags & XLOG_UNMOUNT_TRANS) {
921 * Set tail and last sync so that newly written
922 * log records will point recovery to after the
923 * current unmount record.
925 ASSIGN_ANY_LSN_HOST(log->l_tail_lsn, log->l_curr_cycle,
927 ASSIGN_ANY_LSN_HOST(log->l_last_sync_lsn, log->l_curr_cycle,
929 *tail_blk = after_umount_blk;
934 * Make sure that there are no blocks in front of the head
935 * with the same cycle number as the head. This can happen
936 * because we allow multiple outstanding log writes concurrently,
937 * and the later writes might make it out before earlier ones.
939 * We use the lsn from before modifying it so that we'll never
940 * overwrite the unmount record after a clean unmount.
942 * Do this only if we are going to recover the filesystem
944 * NOTE: This used to say "if (!readonly)"
945 * However on Linux, we can & do recover a read-only filesystem.
946 * We only skip recovery if NORECOVERY is specified on mount,
947 * in which case we would not be here.
949 * But... if the -device- itself is readonly, just skip this.
950 * We can't recover this device anyway, so it won't matter.
952 if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) {
953 error = xlog_clear_stale_blocks(log, tail_lsn);
961 xlog_warn("XFS: failed to locate log tail");
966 * Is the log zeroed at all?
968 * The last binary search should be changed to perform an X block read
969 * once X becomes small enough. You can then search linearly through
970 * the X blocks. This will cut down on the number of reads we need to do.
972 * If the log is partially zeroed, this routine will pass back the blkno
973 * of the first block with cycle number 0. It won't have a complete LR
977 * 0 => the log is completely written to
978 * -1 => use *blk_no as the first block of the log
979 * >0 => error has occurred
988 uint first_cycle, last_cycle;
989 xfs_daddr_t new_blk, last_blk, start_blk;
990 xfs_daddr_t num_scan_bblks;
991 int error, log_bbnum = log->l_logBBsize;
995 /* check totally zeroed log */
996 bp = xlog_get_bp(log, 1);
999 if ((error = xlog_bread(log, 0, 1, bp)))
1001 offset = xlog_align(log, 0, 1, bp);
1002 first_cycle = GET_CYCLE(offset, ARCH_CONVERT);
1003 if (first_cycle == 0) { /* completely zeroed log */
1009 /* check partially zeroed log */
1010 if ((error = xlog_bread(log, log_bbnum-1, 1, bp)))
1012 offset = xlog_align(log, log_bbnum-1, 1, bp);
1013 last_cycle = GET_CYCLE(offset, ARCH_CONVERT);
1014 if (last_cycle != 0) { /* log completely written to */
1017 } else if (first_cycle != 1) {
1019 * If the cycle of the last block is zero, the cycle of
1020 * the first block must be 1. If it's not, maybe we're
1021 * not looking at a log... Bail out.
1023 xlog_warn("XFS: Log inconsistent or not a log (last==0, first!=1)");
1024 return XFS_ERROR(EINVAL);
1027 /* we have a partially zeroed log */
1028 last_blk = log_bbnum-1;
1029 if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0)))
1033 * Validate the answer. Because there is no way to guarantee that
1034 * the entire log is made up of log records which are the same size,
1035 * we scan over the defined maximum blocks. At this point, the maximum
1036 * is not chosen to mean anything special. XXXmiken
1038 num_scan_bblks = XLOG_TOTAL_REC_SHIFT(log);
1039 ASSERT(num_scan_bblks <= INT_MAX);
1041 if (last_blk < num_scan_bblks)
1042 num_scan_bblks = last_blk;
1043 start_blk = last_blk - num_scan_bblks;
1046 * We search for any instances of cycle number 0 that occur before
1047 * our current estimate of the head. What we're trying to detect is
1048 * 1 ... | 0 | 1 | 0...
1049 * ^ binary search ends here
1051 if ((error = xlog_find_verify_cycle(log, start_blk,
1052 (int)num_scan_bblks, 0, &new_blk)))
1058 * Potentially backup over partial log record write. We don't need
1059 * to search the end of the log because we know it is zero.
1061 if ((error = xlog_find_verify_log_record(log, start_blk,
1062 &last_blk, 0)) == -1) {
1063 error = XFS_ERROR(EIO);
1077 * These are simple subroutines used by xlog_clear_stale_blocks() below
1078 * to initialize a buffer full of empty log record headers and write
1079 * them into the log.
1090 xlog_rec_header_t *recp = (xlog_rec_header_t *)buf;
1092 memset(buf, 0, BBSIZE);
1093 INT_SET(recp->h_magicno, ARCH_CONVERT, XLOG_HEADER_MAGIC_NUM);
1094 INT_SET(recp->h_cycle, ARCH_CONVERT, cycle);
1095 INT_SET(recp->h_version, ARCH_CONVERT,
1096 XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? 2 : 1);
1097 ASSIGN_ANY_LSN_DISK(recp->h_lsn, cycle, block);
1098 ASSIGN_ANY_LSN_DISK(recp->h_tail_lsn, tail_cycle, tail_block);
1099 INT_SET(recp->h_fmt, ARCH_CONVERT, XLOG_FMT);
1100 memcpy(&recp->h_fs_uuid, &log->l_mp->m_sb.sb_uuid, sizeof(uuid_t));
1104 xlog_write_log_records(
1115 int sectbb = XLOG_SECTOR_ROUNDUP_BBCOUNT(log, 1);
1116 int end_block = start_block + blocks;
1121 bufblks = 1 << ffs(blocks);
1122 while (!(bp = xlog_get_bp(log, bufblks))) {
1124 if (bufblks <= log->l_sectbb_log)
1128 /* We may need to do a read at the start to fill in part of
1129 * the buffer in the starting sector not covered by the first
1132 balign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, start_block);
1133 if (balign != start_block) {
1134 if ((error = xlog_bread(log, start_block, 1, bp))) {
1138 j = start_block - balign;
1141 for (i = start_block; i < end_block; i += bufblks) {
1142 int bcount, endcount;
1144 bcount = min(bufblks, end_block - start_block);
1145 endcount = bcount - j;
1147 /* We may need to do a read at the end to fill in part of
1148 * the buffer in the final sector not covered by the write.
1149 * If this is the same sector as the above read, skip it.
1151 ealign = XLOG_SECTOR_ROUNDDOWN_BLKNO(log, end_block);
1152 if (j == 0 && (start_block + endcount > ealign)) {
1153 offset = XFS_BUF_PTR(bp);
1154 balign = BBTOB(ealign - start_block);
1155 XFS_BUF_SET_PTR(bp, offset + balign, BBTOB(sectbb));
1156 if ((error = xlog_bread(log, ealign, sectbb, bp)))
1158 XFS_BUF_SET_PTR(bp, offset, bufblks);
1161 offset = xlog_align(log, start_block, endcount, bp);
1162 for (; j < endcount; j++) {
1163 xlog_add_record(log, offset, cycle, i+j,
1164 tail_cycle, tail_block);
1167 error = xlog_bwrite(log, start_block, endcount, bp);
1170 start_block += endcount;
1178 * This routine is called to blow away any incomplete log writes out
1179 * in front of the log head. We do this so that we won't become confused
1180 * if we come up, write only a little bit more, and then crash again.
1181 * If we leave the partial log records out there, this situation could
1182 * cause us to think those partial writes are valid blocks since they
1183 * have the current cycle number. We get rid of them by overwriting them
1184 * with empty log records with the old cycle number rather than the
1187 * The tail lsn is passed in rather than taken from
1188 * the log so that we will not write over the unmount record after a
1189 * clean unmount in a 512 block log. Doing so would leave the log without
1190 * any valid log records in it until a new one was written. If we crashed
1191 * during that time we would not be able to recover.
1194 xlog_clear_stale_blocks(
1198 int tail_cycle, head_cycle;
1199 int tail_block, head_block;
1200 int tail_distance, max_distance;
1204 tail_cycle = CYCLE_LSN(tail_lsn);
1205 tail_block = BLOCK_LSN(tail_lsn);
1206 head_cycle = log->l_curr_cycle;
1207 head_block = log->l_curr_block;
1210 * Figure out the distance between the new head of the log
1211 * and the tail. We want to write over any blocks beyond the
1212 * head that we may have written just before the crash, but
1213 * we don't want to overwrite the tail of the log.
1215 if (head_cycle == tail_cycle) {
1217 * The tail is behind the head in the physical log,
1218 * so the distance from the head to the tail is the
1219 * distance from the head to the end of the log plus
1220 * the distance from the beginning of the log to the
1223 if (unlikely(head_block < tail_block || head_block >= log->l_logBBsize)) {
1224 XFS_ERROR_REPORT("xlog_clear_stale_blocks(1)",
1225 XFS_ERRLEVEL_LOW, log->l_mp);
1226 return XFS_ERROR(EFSCORRUPTED);
1228 tail_distance = tail_block + (log->l_logBBsize - head_block);
1231 * The head is behind the tail in the physical log,
1232 * so the distance from the head to the tail is just
1233 * the tail block minus the head block.
1235 if (unlikely(head_block >= tail_block || head_cycle != (tail_cycle + 1))){
1236 XFS_ERROR_REPORT("xlog_clear_stale_blocks(2)",
1237 XFS_ERRLEVEL_LOW, log->l_mp);
1238 return XFS_ERROR(EFSCORRUPTED);
1240 tail_distance = tail_block - head_block;
1244 * If the head is right up against the tail, we can't clear
1247 if (tail_distance <= 0) {
1248 ASSERT(tail_distance == 0);
1252 max_distance = XLOG_TOTAL_REC_SHIFT(log);
1254 * Take the smaller of the maximum amount of outstanding I/O
1255 * we could have and the distance to the tail to clear out.
1256 * We take the smaller so that we don't overwrite the tail and
1257 * we don't waste all day writing from the head to the tail
1260 max_distance = MIN(max_distance, tail_distance);
1262 if ((head_block + max_distance) <= log->l_logBBsize) {
1264 * We can stomp all the blocks we need to without
1265 * wrapping around the end of the log. Just do it
1266 * in a single write. Use the cycle number of the
1267 * current cycle minus one so that the log will look like:
1270 error = xlog_write_log_records(log, (head_cycle - 1),
1271 head_block, max_distance, tail_cycle,
1277 * We need to wrap around the end of the physical log in
1278 * order to clear all the blocks. Do it in two separate
1279 * I/Os. The first write should be from the head to the
1280 * end of the physical log, and it should use the current
1281 * cycle number minus one just like above.
1283 distance = log->l_logBBsize - head_block;
1284 error = xlog_write_log_records(log, (head_cycle - 1),
1285 head_block, distance, tail_cycle,
1292 * Now write the blocks at the start of the physical log.
1293 * This writes the remainder of the blocks we want to clear.
1294 * It uses the current cycle number since we're now on the
1295 * same cycle as the head so that we get:
1296 * n ... n ... | n - 1 ...
1297 * ^^^^^ blocks we're writing
1299 distance = max_distance - (log->l_logBBsize - head_block);
1300 error = xlog_write_log_records(log, head_cycle, 0, distance,
1301 tail_cycle, tail_block);
1309 /******************************************************************************
1311 * Log recover routines
1313 ******************************************************************************
1316 STATIC xlog_recover_t *
1317 xlog_recover_find_tid(
1321 xlog_recover_t *p = q;
1324 if (p->r_log_tid == tid)
1332 xlog_recover_put_hashq(
1334 xlog_recover_t *trans)
1341 xlog_recover_add_item(
1342 xlog_recover_item_t **itemq)
1344 xlog_recover_item_t *item;
1346 item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP);
1347 xlog_recover_insert_item_backq(itemq, item);
1351 xlog_recover_add_to_cont_trans(
1352 xlog_recover_t *trans,
1356 xlog_recover_item_t *item;
1357 xfs_caddr_t ptr, old_ptr;
1360 item = trans->r_itemq;
1362 /* finish copying rest of trans header */
1363 xlog_recover_add_item(&trans->r_itemq);
1364 ptr = (xfs_caddr_t) &trans->r_theader +
1365 sizeof(xfs_trans_header_t) - len;
1366 memcpy(ptr, dp, len); /* d, s, l */
1369 item = item->ri_prev;
1371 old_ptr = item->ri_buf[item->ri_cnt-1].i_addr;
1372 old_len = item->ri_buf[item->ri_cnt-1].i_len;
1374 ptr = kmem_realloc(old_ptr, len+old_len, old_len, 0u);
1375 memcpy(&ptr[old_len], dp, len); /* d, s, l */
1376 item->ri_buf[item->ri_cnt-1].i_len += len;
1377 item->ri_buf[item->ri_cnt-1].i_addr = ptr;
1382 * The next region to add is the start of a new region. It could be
1383 * a whole region or it could be the first part of a new region. Because
1384 * of this, the assumption here is that the type and size fields of all
1385 * format structures fit into the first 32 bits of the structure.
1387 * This works because all regions must be 32 bit aligned. Therefore, we
1388 * either have both fields or we have neither field. In the case we have
1389 * neither field, the data part of the region is zero length. We only have
1390 * a log_op_header and can throw away the header since a new one will appear
1391 * later. If we have at least 4 bytes, then we can determine how many regions
1392 * will appear in the current log item.
1395 xlog_recover_add_to_trans(
1396 xlog_recover_t *trans,
1400 xfs_inode_log_format_t *in_f; /* any will do */
1401 xlog_recover_item_t *item;
1406 item = trans->r_itemq;
1408 ASSERT(*(uint *)dp == XFS_TRANS_HEADER_MAGIC);
1409 if (len == sizeof(xfs_trans_header_t))
1410 xlog_recover_add_item(&trans->r_itemq);
1411 memcpy(&trans->r_theader, dp, len); /* d, s, l */
1415 ptr = kmem_alloc(len, KM_SLEEP);
1416 memcpy(ptr, dp, len);
1417 in_f = (xfs_inode_log_format_t *)ptr;
1419 if (item->ri_prev->ri_total != 0 &&
1420 item->ri_prev->ri_total == item->ri_prev->ri_cnt) {
1421 xlog_recover_add_item(&trans->r_itemq);
1423 item = trans->r_itemq;
1424 item = item->ri_prev;
1426 if (item->ri_total == 0) { /* first region to be added */
1427 item->ri_total = in_f->ilf_size;
1428 ASSERT(item->ri_total <= XLOG_MAX_REGIONS_IN_ITEM);
1429 item->ri_buf = kmem_zalloc((item->ri_total *
1430 sizeof(xfs_log_iovec_t)), KM_SLEEP);
1432 ASSERT(item->ri_total > item->ri_cnt);
1433 /* Description region is ri_buf[0] */
1434 item->ri_buf[item->ri_cnt].i_addr = ptr;
1435 item->ri_buf[item->ri_cnt].i_len = len;
1441 xlog_recover_new_tid(
1446 xlog_recover_t *trans;
1448 trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP);
1449 trans->r_log_tid = tid;
1451 xlog_recover_put_hashq(q, trans);
1455 xlog_recover_unlink_tid(
1457 xlog_recover_t *trans)
1468 if (tp->r_next == trans) {
1476 "XFS: xlog_recover_unlink_tid: trans not found");
1478 return XFS_ERROR(EIO);
1480 tp->r_next = tp->r_next->r_next;
1486 xlog_recover_insert_item_backq(
1487 xlog_recover_item_t **q,
1488 xlog_recover_item_t *item)
1491 item->ri_prev = item->ri_next = item;
1495 item->ri_prev = (*q)->ri_prev;
1496 (*q)->ri_prev = item;
1497 item->ri_prev->ri_next = item;
1502 xlog_recover_insert_item_frontq(
1503 xlog_recover_item_t **q,
1504 xlog_recover_item_t *item)
1506 xlog_recover_insert_item_backq(q, item);
1511 xlog_recover_reorder_trans(
1512 xlog_recover_t *trans)
1514 xlog_recover_item_t *first_item, *itemq, *itemq_next;
1515 xfs_buf_log_format_t *buf_f;
1518 first_item = itemq = trans->r_itemq;
1519 trans->r_itemq = NULL;
1521 itemq_next = itemq->ri_next;
1522 buf_f = (xfs_buf_log_format_t *)itemq->ri_buf[0].i_addr;
1524 switch (ITEM_TYPE(itemq)) {
1526 flags = buf_f->blf_flags;
1527 if (!(flags & XFS_BLI_CANCEL)) {
1528 xlog_recover_insert_item_frontq(&trans->r_itemq,
1534 case XFS_LI_QUOTAOFF:
1537 xlog_recover_insert_item_backq(&trans->r_itemq, itemq);
1541 "XFS: xlog_recover_reorder_trans: unrecognized type of log operation");
1543 return XFS_ERROR(EIO);
1546 } while (first_item != itemq);
1551 * Build up the table of buf cancel records so that we don't replay
1552 * cancelled data in the second pass. For buffer records that are
1553 * not cancel records, there is nothing to do here so we just return.
1555 * If we get a cancel record which is already in the table, this indicates
1556 * that the buffer was cancelled multiple times. In order to ensure
1557 * that during pass 2 we keep the record in the table until we reach its
1558 * last occurrence in the log, we keep a reference count in the cancel
1559 * record in the table to tell us how many times we expect to see this
1560 * record during the second pass.
1563 xlog_recover_do_buffer_pass1(
1565 xfs_buf_log_format_t *buf_f)
1567 xfs_buf_cancel_t *bcp;
1568 xfs_buf_cancel_t *nextp;
1569 xfs_buf_cancel_t *prevp;
1570 xfs_buf_cancel_t **bucket;
1571 xfs_daddr_t blkno = 0;
1575 switch (buf_f->blf_type) {
1577 blkno = buf_f->blf_blkno;
1578 len = buf_f->blf_len;
1579 flags = buf_f->blf_flags;
1584 * If this isn't a cancel buffer item, then just return.
1586 if (!(flags & XFS_BLI_CANCEL))
1590 * Insert an xfs_buf_cancel record into the hash table of
1591 * them. If there is already an identical record, bump
1592 * its reference count.
1594 bucket = &log->l_buf_cancel_table[(__uint64_t)blkno %
1595 XLOG_BC_TABLE_SIZE];
1597 * If the hash bucket is empty then just insert a new record into
1600 if (*bucket == NULL) {
1601 bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t),
1603 bcp->bc_blkno = blkno;
1605 bcp->bc_refcount = 1;
1606 bcp->bc_next = NULL;
1612 * The hash bucket is not empty, so search for duplicates of our
1613 * record. If we find one them just bump its refcount. If not
1614 * then add us at the end of the list.
1618 while (nextp != NULL) {
1619 if (nextp->bc_blkno == blkno && nextp->bc_len == len) {
1620 nextp->bc_refcount++;
1624 nextp = nextp->bc_next;
1626 ASSERT(prevp != NULL);
1627 bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t),
1629 bcp->bc_blkno = blkno;
1631 bcp->bc_refcount = 1;
1632 bcp->bc_next = NULL;
1633 prevp->bc_next = bcp;
1637 * Check to see whether the buffer being recovered has a corresponding
1638 * entry in the buffer cancel record table. If it does then return 1
1639 * so that it will be cancelled, otherwise return 0. If the buffer is
1640 * actually a buffer cancel item (XFS_BLI_CANCEL is set), then decrement
1641 * the refcount on the entry in the table and remove it from the table
1642 * if this is the last reference.
1644 * We remove the cancel record from the table when we encounter its
1645 * last occurrence in the log so that if the same buffer is re-used
1646 * again after its last cancellation we actually replay the changes
1647 * made at that point.
1650 xlog_check_buffer_cancelled(
1656 xfs_buf_cancel_t *bcp;
1657 xfs_buf_cancel_t *prevp;
1658 xfs_buf_cancel_t **bucket;
1660 if (log->l_buf_cancel_table == NULL) {
1662 * There is nothing in the table built in pass one,
1663 * so this buffer must not be cancelled.
1665 ASSERT(!(flags & XFS_BLI_CANCEL));
1669 bucket = &log->l_buf_cancel_table[(__uint64_t)blkno %
1670 XLOG_BC_TABLE_SIZE];
1674 * There is no corresponding entry in the table built
1675 * in pass one, so this buffer has not been cancelled.
1677 ASSERT(!(flags & XFS_BLI_CANCEL));
1682 * Search for an entry in the buffer cancel table that
1683 * matches our buffer.
1686 while (bcp != NULL) {
1687 if (bcp->bc_blkno == blkno && bcp->bc_len == len) {
1689 * We've go a match, so return 1 so that the
1690 * recovery of this buffer is cancelled.
1691 * If this buffer is actually a buffer cancel
1692 * log item, then decrement the refcount on the
1693 * one in the table and remove it if this is the
1696 if (flags & XFS_BLI_CANCEL) {
1698 if (bcp->bc_refcount == 0) {
1699 if (prevp == NULL) {
1700 *bucket = bcp->bc_next;
1702 prevp->bc_next = bcp->bc_next;
1705 sizeof(xfs_buf_cancel_t));
1714 * We didn't find a corresponding entry in the table, so
1715 * return 0 so that the buffer is NOT cancelled.
1717 ASSERT(!(flags & XFS_BLI_CANCEL));
1722 xlog_recover_do_buffer_pass2(
1724 xfs_buf_log_format_t *buf_f)
1726 xfs_daddr_t blkno = 0;
1730 switch (buf_f->blf_type) {
1732 blkno = buf_f->blf_blkno;
1733 flags = buf_f->blf_flags;
1734 len = buf_f->blf_len;
1738 return xlog_check_buffer_cancelled(log, blkno, len, flags);
1742 * Perform recovery for a buffer full of inodes. In these buffers,
1743 * the only data which should be recovered is that which corresponds
1744 * to the di_next_unlinked pointers in the on disk inode structures.
1745 * The rest of the data for the inodes is always logged through the
1746 * inodes themselves rather than the inode buffer and is recovered
1747 * in xlog_recover_do_inode_trans().
1749 * The only time when buffers full of inodes are fully recovered is
1750 * when the buffer is full of newly allocated inodes. In this case
1751 * the buffer will not be marked as an inode buffer and so will be
1752 * sent to xlog_recover_do_reg_buffer() below during recovery.
1755 xlog_recover_do_inode_buffer(
1757 xlog_recover_item_t *item,
1759 xfs_buf_log_format_t *buf_f)
1767 int next_unlinked_offset;
1769 xfs_agino_t *logged_nextp;
1770 xfs_agino_t *buffer_nextp;
1771 unsigned int *data_map = NULL;
1772 unsigned int map_size = 0;
1774 switch (buf_f->blf_type) {
1776 data_map = buf_f->blf_data_map;
1777 map_size = buf_f->blf_map_size;
1781 * Set the variables corresponding to the current region to
1782 * 0 so that we'll initialize them on the first pass through
1790 inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog;
1791 for (i = 0; i < inodes_per_buf; i++) {
1792 next_unlinked_offset = (i * mp->m_sb.sb_inodesize) +
1793 offsetof(xfs_dinode_t, di_next_unlinked);
1795 while (next_unlinked_offset >=
1796 (reg_buf_offset + reg_buf_bytes)) {
1798 * The next di_next_unlinked field is beyond
1799 * the current logged region. Find the next
1800 * logged region that contains or is beyond
1801 * the current di_next_unlinked field.
1804 bit = xfs_next_bit(data_map, map_size, bit);
1807 * If there are no more logged regions in the
1808 * buffer, then we're done.
1814 nbits = xfs_contig_bits(data_map, map_size,
1817 reg_buf_offset = bit << XFS_BLI_SHIFT;
1818 reg_buf_bytes = nbits << XFS_BLI_SHIFT;
1823 * If the current logged region starts after the current
1824 * di_next_unlinked field, then move on to the next
1825 * di_next_unlinked field.
1827 if (next_unlinked_offset < reg_buf_offset) {
1831 ASSERT(item->ri_buf[item_index].i_addr != NULL);
1832 ASSERT((item->ri_buf[item_index].i_len % XFS_BLI_CHUNK) == 0);
1833 ASSERT((reg_buf_offset + reg_buf_bytes) <= XFS_BUF_COUNT(bp));
1836 * The current logged region contains a copy of the
1837 * current di_next_unlinked field. Extract its value
1838 * and copy it to the buffer copy.
1840 logged_nextp = (xfs_agino_t *)
1841 ((char *)(item->ri_buf[item_index].i_addr) +
1842 (next_unlinked_offset - reg_buf_offset));
1843 if (unlikely(*logged_nextp == 0)) {
1844 xfs_fs_cmn_err(CE_ALERT, mp,
1845 "bad inode buffer log record (ptr = 0x%p, bp = 0x%p). XFS trying to replay bad (0) inode di_next_unlinked field",
1847 XFS_ERROR_REPORT("xlog_recover_do_inode_buf",
1848 XFS_ERRLEVEL_LOW, mp);
1849 return XFS_ERROR(EFSCORRUPTED);
1852 buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp,
1853 next_unlinked_offset);
1854 *buffer_nextp = *logged_nextp;
1861 * Perform a 'normal' buffer recovery. Each logged region of the
1862 * buffer should be copied over the corresponding region in the
1863 * given buffer. The bitmap in the buf log format structure indicates
1864 * where to place the logged data.
1868 xlog_recover_do_reg_buffer(
1869 xlog_recover_item_t *item,
1871 xfs_buf_log_format_t *buf_f)
1876 unsigned int *data_map = NULL;
1877 unsigned int map_size = 0;
1880 switch (buf_f->blf_type) {
1882 data_map = buf_f->blf_data_map;
1883 map_size = buf_f->blf_map_size;
1887 i = 1; /* 0 is the buf format structure */
1889 bit = xfs_next_bit(data_map, map_size, bit);
1892 nbits = xfs_contig_bits(data_map, map_size, bit);
1894 ASSERT(item->ri_buf[i].i_addr != 0);
1895 ASSERT(item->ri_buf[i].i_len % XFS_BLI_CHUNK == 0);
1896 ASSERT(XFS_BUF_COUNT(bp) >=
1897 ((uint)bit << XFS_BLI_SHIFT)+(nbits<<XFS_BLI_SHIFT));
1900 * Do a sanity check if this is a dquot buffer. Just checking
1901 * the first dquot in the buffer should do. XXXThis is
1902 * probably a good thing to do for other buf types also.
1905 if (buf_f->blf_flags &
1906 (XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) {
1907 error = xfs_qm_dqcheck((xfs_disk_dquot_t *)
1908 item->ri_buf[i].i_addr,
1909 -1, 0, XFS_QMOPT_DOWARN,
1910 "dquot_buf_recover");
1913 memcpy(xfs_buf_offset(bp,
1914 (uint)bit << XFS_BLI_SHIFT), /* dest */
1915 item->ri_buf[i].i_addr, /* source */
1916 nbits<<XFS_BLI_SHIFT); /* length */
1921 /* Shouldn't be any more regions */
1922 ASSERT(i == item->ri_total);
1926 * Do some primitive error checking on ondisk dquot data structures.
1930 xfs_disk_dquot_t *ddq,
1932 uint type, /* used only when IO_dorepair is true */
1936 xfs_dqblk_t *d = (xfs_dqblk_t *)ddq;
1940 * We can encounter an uninitialized dquot buffer for 2 reasons:
1941 * 1. If we crash while deleting the quotainode(s), and those blks got
1942 * used for user data. This is because we take the path of regular
1943 * file deletion; however, the size field of quotainodes is never
1944 * updated, so all the tricks that we play in itruncate_finish
1945 * don't quite matter.
1947 * 2. We don't play the quota buffers when there's a quotaoff logitem.
1948 * But the allocation will be replayed so we'll end up with an
1949 * uninitialized quota block.
1951 * This is all fine; things are still consistent, and we haven't lost
1952 * any quota information. Just don't complain about bad dquot blks.
1954 if (be16_to_cpu(ddq->d_magic) != XFS_DQUOT_MAGIC) {
1955 if (flags & XFS_QMOPT_DOWARN)
1957 "%s : XFS dquot ID 0x%x, magic 0x%x != 0x%x",
1958 str, id, be16_to_cpu(ddq->d_magic), XFS_DQUOT_MAGIC);
1961 if (ddq->d_version != XFS_DQUOT_VERSION) {
1962 if (flags & XFS_QMOPT_DOWARN)
1964 "%s : XFS dquot ID 0x%x, version 0x%x != 0x%x",
1965 str, id, ddq->d_version, XFS_DQUOT_VERSION);
1969 if (ddq->d_flags != XFS_DQ_USER &&
1970 ddq->d_flags != XFS_DQ_PROJ &&
1971 ddq->d_flags != XFS_DQ_GROUP) {
1972 if (flags & XFS_QMOPT_DOWARN)
1974 "%s : XFS dquot ID 0x%x, unknown flags 0x%x",
1975 str, id, ddq->d_flags);
1979 if (id != -1 && id != be32_to_cpu(ddq->d_id)) {
1980 if (flags & XFS_QMOPT_DOWARN)
1982 "%s : ondisk-dquot 0x%p, ID mismatch: "
1983 "0x%x expected, found id 0x%x",
1984 str, ddq, id, be32_to_cpu(ddq->d_id));
1988 if (!errs && ddq->d_id) {
1989 if (ddq->d_blk_softlimit &&
1990 be64_to_cpu(ddq->d_bcount) >=
1991 be64_to_cpu(ddq->d_blk_softlimit)) {
1992 if (!ddq->d_btimer) {
1993 if (flags & XFS_QMOPT_DOWARN)
1995 "%s : Dquot ID 0x%x (0x%p) "
1996 "BLK TIMER NOT STARTED",
1997 str, (int)be32_to_cpu(ddq->d_id), ddq);
2001 if (ddq->d_ino_softlimit &&
2002 be64_to_cpu(ddq->d_icount) >=
2003 be64_to_cpu(ddq->d_ino_softlimit)) {
2004 if (!ddq->d_itimer) {
2005 if (flags & XFS_QMOPT_DOWARN)
2007 "%s : Dquot ID 0x%x (0x%p) "
2008 "INODE TIMER NOT STARTED",
2009 str, (int)be32_to_cpu(ddq->d_id), ddq);
2013 if (ddq->d_rtb_softlimit &&
2014 be64_to_cpu(ddq->d_rtbcount) >=
2015 be64_to_cpu(ddq->d_rtb_softlimit)) {
2016 if (!ddq->d_rtbtimer) {
2017 if (flags & XFS_QMOPT_DOWARN)
2019 "%s : Dquot ID 0x%x (0x%p) "
2020 "RTBLK TIMER NOT STARTED",
2021 str, (int)be32_to_cpu(ddq->d_id), ddq);
2027 if (!errs || !(flags & XFS_QMOPT_DQREPAIR))
2030 if (flags & XFS_QMOPT_DOWARN)
2031 cmn_err(CE_NOTE, "Re-initializing dquot ID 0x%x", id);
2034 * Typically, a repair is only requested by quotacheck.
2037 ASSERT(flags & XFS_QMOPT_DQREPAIR);
2038 memset(d, 0, sizeof(xfs_dqblk_t));
2040 d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
2041 d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
2042 d->dd_diskdq.d_flags = type;
2043 d->dd_diskdq.d_id = cpu_to_be32(id);
2049 * Perform a dquot buffer recovery.
2050 * Simple algorithm: if we have found a QUOTAOFF logitem of the same type
2051 * (ie. USR or GRP), then just toss this buffer away; don't recover it.
2052 * Else, treat it as a regular buffer and do recovery.
2055 xlog_recover_do_dquot_buffer(
2058 xlog_recover_item_t *item,
2060 xfs_buf_log_format_t *buf_f)
2065 * Filesystems are required to send in quota flags at mount time.
2067 if (mp->m_qflags == 0) {
2072 if (buf_f->blf_flags & XFS_BLI_UDQUOT_BUF)
2073 type |= XFS_DQ_USER;
2074 if (buf_f->blf_flags & XFS_BLI_PDQUOT_BUF)
2075 type |= XFS_DQ_PROJ;
2076 if (buf_f->blf_flags & XFS_BLI_GDQUOT_BUF)
2077 type |= XFS_DQ_GROUP;
2079 * This type of quotas was turned off, so ignore this buffer
2081 if (log->l_quotaoffs_flag & type)
2084 xlog_recover_do_reg_buffer(item, bp, buf_f);
2088 * This routine replays a modification made to a buffer at runtime.
2089 * There are actually two types of buffer, regular and inode, which
2090 * are handled differently. Inode buffers are handled differently
2091 * in that we only recover a specific set of data from them, namely
2092 * the inode di_next_unlinked fields. This is because all other inode
2093 * data is actually logged via inode records and any data we replay
2094 * here which overlaps that may be stale.
2096 * When meta-data buffers are freed at run time we log a buffer item
2097 * with the XFS_BLI_CANCEL bit set to indicate that previous copies
2098 * of the buffer in the log should not be replayed at recovery time.
2099 * This is so that if the blocks covered by the buffer are reused for
2100 * file data before we crash we don't end up replaying old, freed
2101 * meta-data into a user's file.
2103 * To handle the cancellation of buffer log items, we make two passes
2104 * over the log during recovery. During the first we build a table of
2105 * those buffers which have been cancelled, and during the second we
2106 * only replay those buffers which do not have corresponding cancel
2107 * records in the table. See xlog_recover_do_buffer_pass[1,2] above
2108 * for more details on the implementation of the table of cancel records.
2111 xlog_recover_do_buffer_trans(
2113 xlog_recover_item_t *item,
2116 xfs_buf_log_format_t *buf_f;
2125 buf_f = (xfs_buf_log_format_t *)item->ri_buf[0].i_addr;
2127 if (pass == XLOG_RECOVER_PASS1) {
2129 * In this pass we're only looking for buf items
2130 * with the XFS_BLI_CANCEL bit set.
2132 xlog_recover_do_buffer_pass1(log, buf_f);
2136 * In this pass we want to recover all the buffers
2137 * which have not been cancelled and are not
2138 * cancellation buffers themselves. The routine
2139 * we call here will tell us whether or not to
2140 * continue with the replay of this buffer.
2142 cancel = xlog_recover_do_buffer_pass2(log, buf_f);
2147 switch (buf_f->blf_type) {
2149 blkno = buf_f->blf_blkno;
2150 len = buf_f->blf_len;
2151 flags = buf_f->blf_flags;
2154 xfs_fs_cmn_err(CE_ALERT, log->l_mp,
2155 "xfs_log_recover: unknown buffer type 0x%x, logdev %s",
2156 buf_f->blf_type, log->l_mp->m_logname ?
2157 log->l_mp->m_logname : "internal");
2158 XFS_ERROR_REPORT("xlog_recover_do_buffer_trans",
2159 XFS_ERRLEVEL_LOW, log->l_mp);
2160 return XFS_ERROR(EFSCORRUPTED);
2164 if (flags & XFS_BLI_INODE_BUF) {
2165 bp = xfs_buf_read_flags(mp->m_ddev_targp, blkno, len,
2168 bp = xfs_buf_read(mp->m_ddev_targp, blkno, len, 0);
2170 if (XFS_BUF_ISERROR(bp)) {
2171 xfs_ioerror_alert("xlog_recover_do..(read#1)", log->l_mp,
2173 error = XFS_BUF_GETERROR(bp);
2179 if (flags & XFS_BLI_INODE_BUF) {
2180 error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f);
2182 (XFS_BLI_UDQUOT_BUF|XFS_BLI_PDQUOT_BUF|XFS_BLI_GDQUOT_BUF)) {
2183 xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f);
2185 xlog_recover_do_reg_buffer(item, bp, buf_f);
2188 return XFS_ERROR(error);
2191 * Perform delayed write on the buffer. Asynchronous writes will be
2192 * slower when taking into account all the buffers to be flushed.
2194 * Also make sure that only inode buffers with good sizes stay in
2195 * the buffer cache. The kernel moves inodes in buffers of 1 block
2196 * or XFS_INODE_CLUSTER_SIZE bytes, whichever is bigger. The inode
2197 * buffers in the log can be a different size if the log was generated
2198 * by an older kernel using unclustered inode buffers or a newer kernel
2199 * running with a different inode cluster size. Regardless, if the
2200 * the inode buffer size isn't MAX(blocksize, XFS_INODE_CLUSTER_SIZE)
2201 * for *our* value of XFS_INODE_CLUSTER_SIZE, then we need to keep
2202 * the buffer out of the buffer cache so that the buffer won't
2203 * overlap with future reads of those inodes.
2205 if (XFS_DINODE_MAGIC ==
2206 INT_GET(*((__uint16_t *)(xfs_buf_offset(bp, 0))), ARCH_CONVERT) &&
2207 (XFS_BUF_COUNT(bp) != MAX(log->l_mp->m_sb.sb_blocksize,
2208 (__uint32_t)XFS_INODE_CLUSTER_SIZE(log->l_mp)))) {
2210 error = xfs_bwrite(mp, bp);
2212 ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL ||
2213 XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp);
2214 XFS_BUF_SET_FSPRIVATE(bp, mp);
2215 XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone);
2216 xfs_bdwrite(mp, bp);
2223 xlog_recover_do_inode_trans(
2225 xlog_recover_item_t *item,
2228 xfs_inode_log_format_t *in_f;
2240 xfs_dinode_core_t *dicp;
2243 if (pass == XLOG_RECOVER_PASS1) {
2247 if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) {
2248 in_f = (xfs_inode_log_format_t *)item->ri_buf[0].i_addr;
2250 in_f = (xfs_inode_log_format_t *)kmem_alloc(
2251 sizeof(xfs_inode_log_format_t), KM_SLEEP);
2253 error = xfs_inode_item_format_convert(&item->ri_buf[0], in_f);
2257 ino = in_f->ilf_ino;
2259 if (ITEM_TYPE(item) == XFS_LI_INODE) {
2260 imap.im_blkno = (xfs_daddr_t)in_f->ilf_blkno;
2261 imap.im_len = in_f->ilf_len;
2262 imap.im_boffset = in_f->ilf_boffset;
2265 * It's an old inode format record. We don't know where
2266 * its cluster is located on disk, and we can't allow
2267 * xfs_imap() to figure it out because the inode btrees
2268 * are not ready to be used. Therefore do not pass the
2269 * XFS_IMAP_LOOKUP flag to xfs_imap(). This will give
2270 * us only the single block in which the inode lives
2271 * rather than its cluster, so we must make sure to
2272 * invalidate the buffer when we write it out below.
2275 xfs_imap(log->l_mp, NULL, ino, &imap, 0);
2279 * Inode buffers can be freed, look out for it,
2280 * and do not replay the inode.
2282 if (xlog_check_buffer_cancelled(log, imap.im_blkno, imap.im_len, 0)) {
2287 bp = xfs_buf_read_flags(mp->m_ddev_targp, imap.im_blkno, imap.im_len,
2289 if (XFS_BUF_ISERROR(bp)) {
2290 xfs_ioerror_alert("xlog_recover_do..(read#2)", mp,
2292 error = XFS_BUF_GETERROR(bp);
2297 ASSERT(in_f->ilf_fields & XFS_ILOG_CORE);
2298 dip = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset);
2301 * Make sure the place we're flushing out to really looks
2304 if (unlikely(INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC)) {
2306 xfs_fs_cmn_err(CE_ALERT, mp,
2307 "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld",
2309 XFS_ERROR_REPORT("xlog_recover_do_inode_trans(1)",
2310 XFS_ERRLEVEL_LOW, mp);
2311 error = EFSCORRUPTED;
2314 dicp = (xfs_dinode_core_t*)(item->ri_buf[1].i_addr);
2315 if (unlikely(dicp->di_magic != XFS_DINODE_MAGIC)) {
2317 xfs_fs_cmn_err(CE_ALERT, mp,
2318 "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, ino %Ld",
2320 XFS_ERROR_REPORT("xlog_recover_do_inode_trans(2)",
2321 XFS_ERRLEVEL_LOW, mp);
2322 error = EFSCORRUPTED;
2326 /* Skip replay when the on disk inode is newer than the log one */
2327 if (dicp->di_flushiter <
2328 INT_GET(dip->di_core.di_flushiter, ARCH_CONVERT)) {
2330 * Deal with the wrap case, DI_MAX_FLUSH is less
2331 * than smaller numbers
2333 if ((INT_GET(dip->di_core.di_flushiter, ARCH_CONVERT)
2335 (dicp->di_flushiter < (DI_MAX_FLUSH>>1))) {
2343 /* Take the opportunity to reset the flush iteration count */
2344 dicp->di_flushiter = 0;
2346 if (unlikely((dicp->di_mode & S_IFMT) == S_IFREG)) {
2347 if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) &&
2348 (dicp->di_format != XFS_DINODE_FMT_BTREE)) {
2349 XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(3)",
2350 XFS_ERRLEVEL_LOW, mp, dicp);
2352 xfs_fs_cmn_err(CE_ALERT, mp,
2353 "xfs_inode_recover: Bad regular inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld",
2354 item, dip, bp, ino);
2355 error = EFSCORRUPTED;
2358 } else if (unlikely((dicp->di_mode & S_IFMT) == S_IFDIR)) {
2359 if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) &&
2360 (dicp->di_format != XFS_DINODE_FMT_BTREE) &&
2361 (dicp->di_format != XFS_DINODE_FMT_LOCAL)) {
2362 XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(4)",
2363 XFS_ERRLEVEL_LOW, mp, dicp);
2365 xfs_fs_cmn_err(CE_ALERT, mp,
2366 "xfs_inode_recover: Bad dir inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld",
2367 item, dip, bp, ino);
2368 error = EFSCORRUPTED;
2372 if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){
2373 XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(5)",
2374 XFS_ERRLEVEL_LOW, mp, dicp);
2376 xfs_fs_cmn_err(CE_ALERT, mp,
2377 "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld",
2379 dicp->di_nextents + dicp->di_anextents,
2381 error = EFSCORRUPTED;
2384 if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) {
2385 XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(6)",
2386 XFS_ERRLEVEL_LOW, mp, dicp);
2388 xfs_fs_cmn_err(CE_ALERT, mp,
2389 "xfs_inode_recover: Bad inode log rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, forkoff 0x%x",
2390 item, dip, bp, ino, dicp->di_forkoff);
2391 error = EFSCORRUPTED;
2394 if (unlikely(item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t))) {
2395 XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(7)",
2396 XFS_ERRLEVEL_LOW, mp, dicp);
2398 xfs_fs_cmn_err(CE_ALERT, mp,
2399 "xfs_inode_recover: Bad inode log record length %d, rec ptr 0x%p",
2400 item->ri_buf[1].i_len, item);
2401 error = EFSCORRUPTED;
2405 /* The core is in in-core format */
2406 xfs_xlate_dinode_core((xfs_caddr_t)&dip->di_core,
2407 (xfs_dinode_core_t*)item->ri_buf[1].i_addr, -1);
2409 /* the rest is in on-disk format */
2410 if (item->ri_buf[1].i_len > sizeof(xfs_dinode_core_t)) {
2411 memcpy((xfs_caddr_t) dip + sizeof(xfs_dinode_core_t),
2412 item->ri_buf[1].i_addr + sizeof(xfs_dinode_core_t),
2413 item->ri_buf[1].i_len - sizeof(xfs_dinode_core_t));
2416 fields = in_f->ilf_fields;
2417 switch (fields & (XFS_ILOG_DEV | XFS_ILOG_UUID)) {
2419 INT_SET(dip->di_u.di_dev, ARCH_CONVERT, in_f->ilf_u.ilfu_rdev);
2423 dip->di_u.di_muuid = in_f->ilf_u.ilfu_uuid;
2427 if (in_f->ilf_size == 2)
2428 goto write_inode_buffer;
2429 len = item->ri_buf[2].i_len;
2430 src = item->ri_buf[2].i_addr;
2431 ASSERT(in_f->ilf_size <= 4);
2432 ASSERT((in_f->ilf_size == 3) || (fields & XFS_ILOG_AFORK));
2433 ASSERT(!(fields & XFS_ILOG_DFORK) ||
2434 (len == in_f->ilf_dsize));
2436 switch (fields & XFS_ILOG_DFORK) {
2437 case XFS_ILOG_DDATA:
2439 memcpy(&dip->di_u, src, len);
2442 case XFS_ILOG_DBROOT:
2443 xfs_bmbt_to_bmdr((xfs_bmbt_block_t *)src, len,
2444 &(dip->di_u.di_bmbt),
2445 XFS_DFORK_DSIZE(dip, mp));
2450 * There are no data fork flags set.
2452 ASSERT((fields & XFS_ILOG_DFORK) == 0);
2457 * If we logged any attribute data, recover it. There may or
2458 * may not have been any other non-core data logged in this
2461 if (in_f->ilf_fields & XFS_ILOG_AFORK) {
2462 if (in_f->ilf_fields & XFS_ILOG_DFORK) {
2467 len = item->ri_buf[attr_index].i_len;
2468 src = item->ri_buf[attr_index].i_addr;
2469 ASSERT(len == in_f->ilf_asize);
2471 switch (in_f->ilf_fields & XFS_ILOG_AFORK) {
2472 case XFS_ILOG_ADATA:
2474 dest = XFS_DFORK_APTR(dip);
2475 ASSERT(len <= XFS_DFORK_ASIZE(dip, mp));
2476 memcpy(dest, src, len);
2479 case XFS_ILOG_ABROOT:
2480 dest = XFS_DFORK_APTR(dip);
2481 xfs_bmbt_to_bmdr((xfs_bmbt_block_t *)src, len,
2482 (xfs_bmdr_block_t*)dest,
2483 XFS_DFORK_ASIZE(dip, mp));
2487 xlog_warn("XFS: xlog_recover_do_inode_trans: Invalid flag");
2496 if (ITEM_TYPE(item) == XFS_LI_INODE) {
2497 ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL ||
2498 XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp);
2499 XFS_BUF_SET_FSPRIVATE(bp, mp);
2500 XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone);
2501 xfs_bdwrite(mp, bp);
2504 error = xfs_bwrite(mp, bp);
2509 kmem_free(in_f, sizeof(*in_f));
2510 return XFS_ERROR(error);
2514 * Recover QUOTAOFF records. We simply make a note of it in the xlog_t
2515 * structure, so that we know not to do any dquot item or dquot buffer recovery,
2519 xlog_recover_do_quotaoff_trans(
2521 xlog_recover_item_t *item,
2524 xfs_qoff_logformat_t *qoff_f;
2526 if (pass == XLOG_RECOVER_PASS2) {
2530 qoff_f = (xfs_qoff_logformat_t *)item->ri_buf[0].i_addr;
2534 * The logitem format's flag tells us if this was user quotaoff,
2535 * group/project quotaoff or both.
2537 if (qoff_f->qf_flags & XFS_UQUOTA_ACCT)
2538 log->l_quotaoffs_flag |= XFS_DQ_USER;
2539 if (qoff_f->qf_flags & XFS_PQUOTA_ACCT)
2540 log->l_quotaoffs_flag |= XFS_DQ_PROJ;
2541 if (qoff_f->qf_flags & XFS_GQUOTA_ACCT)
2542 log->l_quotaoffs_flag |= XFS_DQ_GROUP;
2548 * Recover a dquot record
2551 xlog_recover_do_dquot_trans(
2553 xlog_recover_item_t *item,
2558 struct xfs_disk_dquot *ddq, *recddq;
2560 xfs_dq_logformat_t *dq_f;
2563 if (pass == XLOG_RECOVER_PASS1) {
2569 * Filesystems are required to send in quota flags at mount time.
2571 if (mp->m_qflags == 0)
2574 recddq = (xfs_disk_dquot_t *)item->ri_buf[1].i_addr;
2577 * This type of quotas was turned off, so ignore this record.
2579 type = INT_GET(recddq->d_flags, ARCH_CONVERT) &
2580 (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP);
2582 if (log->l_quotaoffs_flag & type)
2586 * At this point we know that quota was _not_ turned off.
2587 * Since the mount flags are not indicating to us otherwise, this
2588 * must mean that quota is on, and the dquot needs to be replayed.
2589 * Remember that we may not have fully recovered the superblock yet,
2590 * so we can't do the usual trick of looking at the SB quota bits.
2592 * The other possibility, of course, is that the quota subsystem was
2593 * removed since the last mount - ENOSYS.
2595 dq_f = (xfs_dq_logformat_t *)item->ri_buf[0].i_addr;
2597 if ((error = xfs_qm_dqcheck(recddq,
2599 0, XFS_QMOPT_DOWARN,
2600 "xlog_recover_do_dquot_trans (log copy)"))) {
2601 return XFS_ERROR(EIO);
2603 ASSERT(dq_f->qlf_len == 1);
2605 error = xfs_read_buf(mp, mp->m_ddev_targp,
2607 XFS_FSB_TO_BB(mp, dq_f->qlf_len),
2610 xfs_ioerror_alert("xlog_recover_do..(read#3)", mp,
2611 bp, dq_f->qlf_blkno);
2615 ddq = (xfs_disk_dquot_t *)xfs_buf_offset(bp, dq_f->qlf_boffset);
2618 * At least the magic num portion should be on disk because this
2619 * was among a chunk of dquots created earlier, and we did some
2620 * minimal initialization then.
2622 if (xfs_qm_dqcheck(ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN,
2623 "xlog_recover_do_dquot_trans")) {
2625 return XFS_ERROR(EIO);
2628 memcpy(ddq, recddq, item->ri_buf[1].i_len);
2630 ASSERT(dq_f->qlf_size == 2);
2631 ASSERT(XFS_BUF_FSPRIVATE(bp, void *) == NULL ||
2632 XFS_BUF_FSPRIVATE(bp, xfs_mount_t *) == mp);
2633 XFS_BUF_SET_FSPRIVATE(bp, mp);
2634 XFS_BUF_SET_IODONE_FUNC(bp, xlog_recover_iodone);
2635 xfs_bdwrite(mp, bp);
2641 * This routine is called to create an in-core extent free intent
2642 * item from the efi format structure which was logged on disk.
2643 * It allocates an in-core efi, copies the extents from the format
2644 * structure into it, and adds the efi to the AIL with the given
2648 xlog_recover_do_efi_trans(
2650 xlog_recover_item_t *item,
2656 xfs_efi_log_item_t *efip;
2657 xfs_efi_log_format_t *efi_formatp;
2660 if (pass == XLOG_RECOVER_PASS1) {
2664 efi_formatp = (xfs_efi_log_format_t *)item->ri_buf[0].i_addr;
2667 efip = xfs_efi_init(mp, efi_formatp->efi_nextents);
2668 if ((error = xfs_efi_copy_format(&(item->ri_buf[0]),
2669 &(efip->efi_format)))) {
2670 xfs_efi_item_free(efip);
2673 efip->efi_next_extent = efi_formatp->efi_nextents;
2674 efip->efi_flags |= XFS_EFI_COMMITTED;
2678 * xfs_trans_update_ail() drops the AIL lock.
2680 xfs_trans_update_ail(mp, (xfs_log_item_t *)efip, lsn, s);
2686 * This routine is called when an efd format structure is found in
2687 * a committed transaction in the log. It's purpose is to cancel
2688 * the corresponding efi if it was still in the log. To do this
2689 * it searches the AIL for the efi with an id equal to that in the
2690 * efd format structure. If we find it, we remove the efi from the
2694 xlog_recover_do_efd_trans(
2696 xlog_recover_item_t *item,
2700 xfs_efd_log_format_t *efd_formatp;
2701 xfs_efi_log_item_t *efip = NULL;
2702 xfs_log_item_t *lip;
2707 if (pass == XLOG_RECOVER_PASS1) {
2711 efd_formatp = (xfs_efd_log_format_t *)item->ri_buf[0].i_addr;
2712 ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) +
2713 ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) ||
2714 (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) +
2715 ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t)))));
2716 efi_id = efd_formatp->efd_efi_id;
2719 * Search for the efi with the id in the efd format structure
2724 lip = xfs_trans_first_ail(mp, &gen);
2725 while (lip != NULL) {
2726 if (lip->li_type == XFS_LI_EFI) {
2727 efip = (xfs_efi_log_item_t *)lip;
2728 if (efip->efi_format.efi_id == efi_id) {
2730 * xfs_trans_delete_ail() drops the
2733 xfs_trans_delete_ail(mp, lip, s);
2737 lip = xfs_trans_next_ail(mp, lip, &gen, NULL);
2741 * If we found it, then free it up. If it wasn't there, it
2742 * must have been overwritten in the log. Oh well.
2745 xfs_efi_item_free(efip);
2752 * Perform the transaction
2754 * If the transaction modifies a buffer or inode, do it now. Otherwise,
2755 * EFIs and EFDs get queued up by adding entries into the AIL for them.
2758 xlog_recover_do_trans(
2760 xlog_recover_t *trans,
2764 xlog_recover_item_t *item, *first_item;
2766 if ((error = xlog_recover_reorder_trans(trans)))
2768 first_item = item = trans->r_itemq;
2771 * we don't need to worry about the block number being
2772 * truncated in > 1 TB buffers because in user-land,
2773 * we're now n32 or 64-bit so xfs_daddr_t is 64-bits so
2774 * the blknos will get through the user-mode buffer
2775 * cache properly. The only bad case is o32 kernels
2776 * where xfs_daddr_t is 32-bits but mount will warn us
2777 * off a > 1 TB filesystem before we get here.
2779 if ((ITEM_TYPE(item) == XFS_LI_BUF)) {
2780 if ((error = xlog_recover_do_buffer_trans(log, item,
2783 } else if ((ITEM_TYPE(item) == XFS_LI_INODE)) {
2784 if ((error = xlog_recover_do_inode_trans(log, item,
2787 } else if (ITEM_TYPE(item) == XFS_LI_EFI) {
2788 if ((error = xlog_recover_do_efi_trans(log, item, trans->r_lsn,
2791 } else if (ITEM_TYPE(item) == XFS_LI_EFD) {
2792 xlog_recover_do_efd_trans(log, item, pass);
2793 } else if (ITEM_TYPE(item) == XFS_LI_DQUOT) {
2794 if ((error = xlog_recover_do_dquot_trans(log, item,
2797 } else if ((ITEM_TYPE(item) == XFS_LI_QUOTAOFF)) {
2798 if ((error = xlog_recover_do_quotaoff_trans(log, item,
2802 xlog_warn("XFS: xlog_recover_do_trans");
2804 error = XFS_ERROR(EIO);
2807 item = item->ri_next;
2808 } while (first_item != item);
2814 * Free up any resources allocated by the transaction
2816 * Remember that EFIs, EFDs, and IUNLINKs are handled later.
2819 xlog_recover_free_trans(
2820 xlog_recover_t *trans)
2822 xlog_recover_item_t *first_item, *item, *free_item;
2825 item = first_item = trans->r_itemq;
2828 item = item->ri_next;
2829 /* Free the regions in the item. */
2830 for (i = 0; i < free_item->ri_cnt; i++) {
2831 kmem_free(free_item->ri_buf[i].i_addr,
2832 free_item->ri_buf[i].i_len);
2834 /* Free the item itself */
2835 kmem_free(free_item->ri_buf,
2836 (free_item->ri_total * sizeof(xfs_log_iovec_t)));
2837 kmem_free(free_item, sizeof(xlog_recover_item_t));
2838 } while (first_item != item);
2839 /* Free the transaction recover structure */
2840 kmem_free(trans, sizeof(xlog_recover_t));
2844 xlog_recover_commit_trans(
2847 xlog_recover_t *trans,
2852 if ((error = xlog_recover_unlink_tid(q, trans)))
2854 if ((error = xlog_recover_do_trans(log, trans, pass)))
2856 xlog_recover_free_trans(trans); /* no error */
2861 xlog_recover_unmount_trans(
2862 xlog_recover_t *trans)
2864 /* Do nothing now */
2865 xlog_warn("XFS: xlog_recover_unmount_trans: Unmount LR");
2870 * There are two valid states of the r_state field. 0 indicates that the
2871 * transaction structure is in a normal state. We have either seen the
2872 * start of the transaction or the last operation we added was not a partial
2873 * operation. If the last operation we added to the transaction was a
2874 * partial operation, we need to mark r_state with XLOG_WAS_CONT_TRANS.
2876 * NOTE: skip LRs with 0 data length.
2879 xlog_recover_process_data(
2881 xlog_recover_t *rhash[],
2882 xlog_rec_header_t *rhead,
2888 xlog_op_header_t *ohead;
2889 xlog_recover_t *trans;
2895 lp = dp + INT_GET(rhead->h_len, ARCH_CONVERT);
2896 num_logops = INT_GET(rhead->h_num_logops, ARCH_CONVERT);
2898 /* check the log format matches our own - else we can't recover */
2899 if (xlog_header_check_recover(log->l_mp, rhead))
2900 return (XFS_ERROR(EIO));
2902 while ((dp < lp) && num_logops) {
2903 ASSERT(dp + sizeof(xlog_op_header_t) <= lp);
2904 ohead = (xlog_op_header_t *)dp;
2905 dp += sizeof(xlog_op_header_t);
2906 if (ohead->oh_clientid != XFS_TRANSACTION &&
2907 ohead->oh_clientid != XFS_LOG) {
2909 "XFS: xlog_recover_process_data: bad clientid");
2911 return (XFS_ERROR(EIO));
2913 tid = INT_GET(ohead->oh_tid, ARCH_CONVERT);
2914 hash = XLOG_RHASH(tid);
2915 trans = xlog_recover_find_tid(rhash[hash], tid);
2916 if (trans == NULL) { /* not found; add new tid */
2917 if (ohead->oh_flags & XLOG_START_TRANS)
2918 xlog_recover_new_tid(&rhash[hash], tid,
2919 INT_GET(rhead->h_lsn, ARCH_CONVERT));
2921 ASSERT(dp+INT_GET(ohead->oh_len, ARCH_CONVERT) <= lp);
2922 flags = ohead->oh_flags & ~XLOG_END_TRANS;
2923 if (flags & XLOG_WAS_CONT_TRANS)
2924 flags &= ~XLOG_CONTINUE_TRANS;
2926 case XLOG_COMMIT_TRANS:
2927 error = xlog_recover_commit_trans(log,
2928 &rhash[hash], trans, pass);
2930 case XLOG_UNMOUNT_TRANS:
2931 error = xlog_recover_unmount_trans(trans);
2933 case XLOG_WAS_CONT_TRANS:
2934 error = xlog_recover_add_to_cont_trans(trans,
2935 dp, INT_GET(ohead->oh_len,
2938 case XLOG_START_TRANS:
2940 "XFS: xlog_recover_process_data: bad transaction");
2942 error = XFS_ERROR(EIO);
2945 case XLOG_CONTINUE_TRANS:
2946 error = xlog_recover_add_to_trans(trans,
2947 dp, INT_GET(ohead->oh_len,
2952 "XFS: xlog_recover_process_data: bad flag");
2954 error = XFS_ERROR(EIO);
2960 dp += INT_GET(ohead->oh_len, ARCH_CONVERT);
2967 * Process an extent free intent item that was recovered from
2968 * the log. We need to free the extents that it describes.
2971 xlog_recover_process_efi(
2973 xfs_efi_log_item_t *efip)
2975 xfs_efd_log_item_t *efdp;
2979 xfs_fsblock_t startblock_fsb;
2981 ASSERT(!(efip->efi_flags & XFS_EFI_RECOVERED));
2984 * First check the validity of the extents described by the
2985 * EFI. If any are bad, then assume that all are bad and
2986 * just toss the EFI.
2988 for (i = 0; i < efip->efi_format.efi_nextents; i++) {
2989 extp = &(efip->efi_format.efi_extents[i]);
2990 startblock_fsb = XFS_BB_TO_FSB(mp,
2991 XFS_FSB_TO_DADDR(mp, extp->ext_start));
2992 if ((startblock_fsb == 0) ||
2993 (extp->ext_len == 0) ||
2994 (startblock_fsb >= mp->m_sb.sb_dblocks) ||
2995 (extp->ext_len >= mp->m_sb.sb_agblocks)) {
2997 * This will pull the EFI from the AIL and
2998 * free the memory associated with it.
3000 xfs_efi_release(efip, efip->efi_format.efi_nextents);
3005 tp = xfs_trans_alloc(mp, 0);
3006 xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, 0, 0);
3007 efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents);
3009 for (i = 0; i < efip->efi_format.efi_nextents; i++) {
3010 extp = &(efip->efi_format.efi_extents[i]);
3011 xfs_free_extent(tp, extp->ext_start, extp->ext_len);
3012 xfs_trans_log_efd_extent(tp, efdp, extp->ext_start,
3016 efip->efi_flags |= XFS_EFI_RECOVERED;
3017 xfs_trans_commit(tp, 0);
3021 * Verify that once we've encountered something other than an EFI
3022 * in the AIL that there are no more EFIs in the AIL.
3026 xlog_recover_check_ail(
3028 xfs_log_item_t *lip,
3034 ASSERT(lip->li_type != XFS_LI_EFI);
3035 lip = xfs_trans_next_ail(mp, lip, &gen, NULL);
3037 * The check will be bogus if we restart from the
3038 * beginning of the AIL, so ASSERT that we don't.
3039 * We never should since we're holding the AIL lock
3042 ASSERT(gen == orig_gen);
3043 } while (lip != NULL);
3048 * When this is called, all of the EFIs which did not have
3049 * corresponding EFDs should be in the AIL. What we do now
3050 * is free the extents associated with each one.
3052 * Since we process the EFIs in normal transactions, they
3053 * will be removed at some point after the commit. This prevents
3054 * us from just walking down the list processing each one.
3055 * We'll use a flag in the EFI to skip those that we've already
3056 * processed and use the AIL iteration mechanism's generation
3057 * count to try to speed this up at least a bit.
3059 * When we start, we know that the EFIs are the only things in
3060 * the AIL. As we process them, however, other items are added
3061 * to the AIL. Since everything added to the AIL must come after
3062 * everything already in the AIL, we stop processing as soon as
3063 * we see something other than an EFI in the AIL.
3066 xlog_recover_process_efis(
3069 xfs_log_item_t *lip;
3070 xfs_efi_log_item_t *efip;
3078 lip = xfs_trans_first_ail(mp, &gen);
3079 while (lip != NULL) {
3081 * We're done when we see something other than an EFI.
3083 if (lip->li_type != XFS_LI_EFI) {
3084 xlog_recover_check_ail(mp, lip, gen);
3089 * Skip EFIs that we've already processed.
3091 efip = (xfs_efi_log_item_t *)lip;
3092 if (efip->efi_flags & XFS_EFI_RECOVERED) {
3093 lip = xfs_trans_next_ail(mp, lip, &gen, NULL);
3098 xlog_recover_process_efi(mp, efip);
3100 lip = xfs_trans_next_ail(mp, lip, &gen, NULL);
3106 * This routine performs a transaction to null out a bad inode pointer
3107 * in an agi unlinked inode hash bucket.
3110 xlog_recover_clear_agi_bucket(
3112 xfs_agnumber_t agno,
3121 tp = xfs_trans_alloc(mp, XFS_TRANS_CLEAR_AGI_BUCKET);
3122 xfs_trans_reserve(tp, 0, XFS_CLEAR_AGI_BUCKET_LOG_RES(mp), 0, 0, 0);
3124 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
3125 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
3126 XFS_FSS_TO_BB(mp, 1), 0, &agibp);
3128 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
3132 agi = XFS_BUF_TO_AGI(agibp);
3133 if (be32_to_cpu(agi->agi_magicnum) != XFS_AGI_MAGIC) {
3134 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
3138 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
3139 offset = offsetof(xfs_agi_t, agi_unlinked) +
3140 (sizeof(xfs_agino_t) * bucket);
3141 xfs_trans_log_buf(tp, agibp, offset,
3142 (offset + sizeof(xfs_agino_t) - 1));
3144 (void) xfs_trans_commit(tp, 0);
3148 * xlog_iunlink_recover
3150 * This is called during recovery to process any inodes which
3151 * we unlinked but not freed when the system crashed. These
3152 * inodes will be on the lists in the AGI blocks. What we do
3153 * here is scan all the AGIs and fully truncate and free any
3154 * inodes found on the lists. Each inode is removed from the
3155 * lists when it has been fully truncated and is freed. The
3156 * freeing of the inode and its removal from the list must be
3160 xlog_recover_process_iunlinks(
3164 xfs_agnumber_t agno;
3179 * Prevent any DMAPI event from being sent while in this function.
3181 mp_dmevmask = mp->m_dmevmask;
3184 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
3186 * Find the agi for this ag.
3188 agibp = xfs_buf_read(mp->m_ddev_targp,
3189 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
3190 XFS_FSS_TO_BB(mp, 1), 0);
3191 if (XFS_BUF_ISERROR(agibp)) {
3192 xfs_ioerror_alert("xlog_recover_process_iunlinks(#1)",
3194 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)));
3196 agi = XFS_BUF_TO_AGI(agibp);
3197 ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agi->agi_magicnum));
3199 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++) {
3201 agino = be32_to_cpu(agi->agi_unlinked[bucket]);
3202 while (agino != NULLAGINO) {
3205 * Release the agi buffer so that it can
3206 * be acquired in the normal course of the
3207 * transaction to truncate and free the inode.
3209 xfs_buf_relse(agibp);
3211 ino = XFS_AGINO_TO_INO(mp, agno, agino);
3212 error = xfs_iget(mp, NULL, ino, 0, 0, &ip, 0);
3213 ASSERT(error || (ip != NULL));
3217 * Get the on disk inode to find the
3218 * next inode in the bucket.
3220 error = xfs_itobp(mp, NULL, ip, &dip,
3222 ASSERT(error || (dip != NULL));
3226 ASSERT(ip->i_d.di_nlink == 0);
3228 /* setup for the next pass */
3229 agino = INT_GET(dip->di_next_unlinked,
3233 * Prevent any DMAPI event from
3234 * being sent when the
3235 * reference on the inode is
3238 ip->i_d.di_dmevmask = 0;
3241 * If this is a new inode, handle
3242 * it specially. Otherwise,
3243 * just drop our reference to the
3244 * inode. If there are no
3245 * other references, this will
3247 * xfs_inactive() which will
3248 * truncate the file and free
3251 if (ip->i_d.di_mode == 0)
3252 xfs_iput_new(ip, 0);
3254 VN_RELE(XFS_ITOV(ip));
3257 * We can't read in the inode
3258 * this bucket points to, or
3259 * this inode is messed up. Just
3260 * ditch this bucket of inodes. We
3261 * will lose some inodes and space,
3262 * but at least we won't hang. Call
3263 * xlog_recover_clear_agi_bucket()
3264 * to perform a transaction to clear
3265 * the inode pointer in the bucket.
3267 xlog_recover_clear_agi_bucket(mp, agno,
3274 * Reacquire the agibuffer and continue around
3277 agibp = xfs_buf_read(mp->m_ddev_targp,
3278 XFS_AG_DADDR(mp, agno,
3280 XFS_FSS_TO_BB(mp, 1), 0);
3281 if (XFS_BUF_ISERROR(agibp)) {
3283 "xlog_recover_process_iunlinks(#2)",
3285 XFS_AG_DADDR(mp, agno,
3286 XFS_AGI_DADDR(mp)));
3288 agi = XFS_BUF_TO_AGI(agibp);
3289 ASSERT(XFS_AGI_MAGIC == be32_to_cpu(
3290 agi->agi_magicnum));
3295 * Release the buffer for the current agi so we can
3296 * go on to the next one.
3298 xfs_buf_relse(agibp);
3301 mp->m_dmevmask = mp_dmevmask;
3307 xlog_pack_data_checksum(
3309 xlog_in_core_t *iclog,
3316 up = (uint *)iclog->ic_datap;
3317 /* divide length by 4 to get # words */
3318 for (i = 0; i < (size >> 2); i++) {
3319 chksum ^= INT_GET(*up, ARCH_CONVERT);
3322 INT_SET(iclog->ic_header.h_chksum, ARCH_CONVERT, chksum);
3325 #define xlog_pack_data_checksum(log, iclog, size)
3329 * Stamp cycle number in every block
3334 xlog_in_core_t *iclog,
3338 int size = iclog->ic_offset + roundoff;
3341 xlog_in_core_2_t *xhdr;
3343 xlog_pack_data_checksum(log, iclog, size);
3345 cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn);
3347 dp = iclog->ic_datap;
3348 for (i = 0; i < BTOBB(size) &&
3349 i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) {
3350 iclog->ic_header.h_cycle_data[i] = *(uint *)dp;
3351 *(uint *)dp = cycle_lsn;
3355 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
3356 xhdr = (xlog_in_core_2_t *)&iclog->ic_header;
3357 for ( ; i < BTOBB(size); i++) {
3358 j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
3359 k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
3360 xhdr[j].hic_xheader.xh_cycle_data[k] = *(uint *)dp;
3361 *(uint *)dp = cycle_lsn;
3365 for (i = 1; i < log->l_iclog_heads; i++) {
3366 xhdr[i].hic_xheader.xh_cycle = cycle_lsn;
3371 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
3373 xlog_unpack_data_checksum(
3374 xlog_rec_header_t *rhead,
3378 uint *up = (uint *)dp;
3382 /* divide length by 4 to get # words */
3383 for (i=0; i < INT_GET(rhead->h_len, ARCH_CONVERT) >> 2; i++) {
3384 chksum ^= INT_GET(*up, ARCH_CONVERT);
3387 if (chksum != INT_GET(rhead->h_chksum, ARCH_CONVERT)) {
3388 if (rhead->h_chksum ||
3389 ((log->l_flags & XLOG_CHKSUM_MISMATCH) == 0)) {
3391 "XFS: LogR chksum mismatch: was (0x%x) is (0x%x)\n",
3392 INT_GET(rhead->h_chksum, ARCH_CONVERT), chksum);
3394 "XFS: Disregard message if filesystem was created with non-DEBUG kernel");
3395 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
3397 "XFS: LogR this is a LogV2 filesystem\n");
3399 log->l_flags |= XLOG_CHKSUM_MISMATCH;
3404 #define xlog_unpack_data_checksum(rhead, dp, log)
3409 xlog_rec_header_t *rhead,
3414 xlog_in_core_2_t *xhdr;
3416 for (i = 0; i < BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)) &&
3417 i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) {
3418 *(uint *)dp = *(uint *)&rhead->h_cycle_data[i];
3422 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
3423 xhdr = (xlog_in_core_2_t *)rhead;
3424 for ( ; i < BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT)); i++) {
3425 j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
3426 k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
3427 *(uint *)dp = xhdr[j].hic_xheader.xh_cycle_data[k];
3432 xlog_unpack_data_checksum(rhead, dp, log);
3436 xlog_valid_rec_header(
3438 xlog_rec_header_t *rhead,
3444 (INT_GET(rhead->h_magicno, ARCH_CONVERT) !=
3445 XLOG_HEADER_MAGIC_NUM))) {
3446 XFS_ERROR_REPORT("xlog_valid_rec_header(1)",
3447 XFS_ERRLEVEL_LOW, log->l_mp);
3448 return XFS_ERROR(EFSCORRUPTED);
3451 (!rhead->h_version ||
3452 (INT_GET(rhead->h_version, ARCH_CONVERT) &
3453 (~XLOG_VERSION_OKBITS)) != 0))) {
3454 xlog_warn("XFS: %s: unrecognised log version (%d).",
3455 __FUNCTION__, INT_GET(rhead->h_version, ARCH_CONVERT));
3456 return XFS_ERROR(EIO);
3459 /* LR body must have data or it wouldn't have been written */
3460 hlen = INT_GET(rhead->h_len, ARCH_CONVERT);
3461 if (unlikely( hlen <= 0 || hlen > INT_MAX )) {
3462 XFS_ERROR_REPORT("xlog_valid_rec_header(2)",
3463 XFS_ERRLEVEL_LOW, log->l_mp);
3464 return XFS_ERROR(EFSCORRUPTED);
3466 if (unlikely( blkno > log->l_logBBsize || blkno > INT_MAX )) {
3467 XFS_ERROR_REPORT("xlog_valid_rec_header(3)",
3468 XFS_ERRLEVEL_LOW, log->l_mp);
3469 return XFS_ERROR(EFSCORRUPTED);
3475 * Read the log from tail to head and process the log records found.
3476 * Handle the two cases where the tail and head are in the same cycle
3477 * and where the active portion of the log wraps around the end of
3478 * the physical log separately. The pass parameter is passed through
3479 * to the routines called to process the data and is not looked at
3483 xlog_do_recovery_pass(
3485 xfs_daddr_t head_blk,
3486 xfs_daddr_t tail_blk,
3489 xlog_rec_header_t *rhead;
3491 xfs_caddr_t bufaddr, offset;
3492 xfs_buf_t *hbp, *dbp;
3493 int error = 0, h_size;
3494 int bblks, split_bblks;
3495 int hblks, split_hblks, wrapped_hblks;
3496 xlog_recover_t *rhash[XLOG_RHASH_SIZE];
3498 ASSERT(head_blk != tail_blk);
3501 * Read the header of the tail block and get the iclog buffer size from
3502 * h_size. Use this to tell how many sectors make up the log header.
3504 if (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb)) {
3506 * When using variable length iclogs, read first sector of
3507 * iclog header and extract the header size from it. Get a
3508 * new hbp that is the correct size.
3510 hbp = xlog_get_bp(log, 1);
3513 if ((error = xlog_bread(log, tail_blk, 1, hbp)))
3515 offset = xlog_align(log, tail_blk, 1, hbp);
3516 rhead = (xlog_rec_header_t *)offset;
3517 error = xlog_valid_rec_header(log, rhead, tail_blk);
3520 h_size = INT_GET(rhead->h_size, ARCH_CONVERT);
3521 if ((INT_GET(rhead->h_version, ARCH_CONVERT)
3522 & XLOG_VERSION_2) &&
3523 (h_size > XLOG_HEADER_CYCLE_SIZE)) {
3524 hblks = h_size / XLOG_HEADER_CYCLE_SIZE;
3525 if (h_size % XLOG_HEADER_CYCLE_SIZE)
3528 hbp = xlog_get_bp(log, hblks);
3533 ASSERT(log->l_sectbb_log == 0);
3535 hbp = xlog_get_bp(log, 1);
3536 h_size = XLOG_BIG_RECORD_BSIZE;
3541 dbp = xlog_get_bp(log, BTOBB(h_size));
3547 memset(rhash, 0, sizeof(rhash));
3548 if (tail_blk <= head_blk) {
3549 for (blk_no = tail_blk; blk_no < head_blk; ) {
3550 if ((error = xlog_bread(log, blk_no, hblks, hbp)))
3552 offset = xlog_align(log, blk_no, hblks, hbp);
3553 rhead = (xlog_rec_header_t *)offset;
3554 error = xlog_valid_rec_header(log, rhead, blk_no);
3558 /* blocks in data section */
3559 bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT));
3560 error = xlog_bread(log, blk_no + hblks, bblks, dbp);
3563 offset = xlog_align(log, blk_no + hblks, bblks, dbp);
3564 xlog_unpack_data(rhead, offset, log);
3565 if ((error = xlog_recover_process_data(log,
3566 rhash, rhead, offset, pass)))
3568 blk_no += bblks + hblks;
3572 * Perform recovery around the end of the physical log.
3573 * When the head is not on the same cycle number as the tail,
3574 * we can't do a sequential recovery as above.
3577 while (blk_no < log->l_logBBsize) {
3579 * Check for header wrapping around physical end-of-log
3584 if (blk_no + hblks <= log->l_logBBsize) {
3585 /* Read header in one read */
3586 error = xlog_bread(log, blk_no, hblks, hbp);
3589 offset = xlog_align(log, blk_no, hblks, hbp);
3591 /* This LR is split across physical log end */
3592 if (blk_no != log->l_logBBsize) {
3593 /* some data before physical log end */
3594 ASSERT(blk_no <= INT_MAX);
3595 split_hblks = log->l_logBBsize - (int)blk_no;
3596 ASSERT(split_hblks > 0);
3597 if ((error = xlog_bread(log, blk_no,
3600 offset = xlog_align(log, blk_no,
3604 * Note: this black magic still works with
3605 * large sector sizes (non-512) only because:
3606 * - we increased the buffer size originally
3607 * by 1 sector giving us enough extra space
3608 * for the second read;
3609 * - the log start is guaranteed to be sector
3611 * - we read the log end (LR header start)
3612 * _first_, then the log start (LR header end)
3613 * - order is important.
3615 bufaddr = XFS_BUF_PTR(hbp);
3616 XFS_BUF_SET_PTR(hbp,
3617 bufaddr + BBTOB(split_hblks),
3618 BBTOB(hblks - split_hblks));
3619 wrapped_hblks = hblks - split_hblks;
3620 error = xlog_bread(log, 0, wrapped_hblks, hbp);
3623 XFS_BUF_SET_PTR(hbp, bufaddr, BBTOB(hblks));
3625 offset = xlog_align(log, 0,
3626 wrapped_hblks, hbp);
3628 rhead = (xlog_rec_header_t *)offset;
3629 error = xlog_valid_rec_header(log, rhead,
3630 split_hblks ? blk_no : 0);
3634 bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT));
3637 /* Read in data for log record */
3638 if (blk_no + bblks <= log->l_logBBsize) {
3639 error = xlog_bread(log, blk_no, bblks, dbp);
3642 offset = xlog_align(log, blk_no, bblks, dbp);
3644 /* This log record is split across the
3645 * physical end of log */
3648 if (blk_no != log->l_logBBsize) {
3649 /* some data is before the physical
3651 ASSERT(!wrapped_hblks);
3652 ASSERT(blk_no <= INT_MAX);
3654 log->l_logBBsize - (int)blk_no;
3655 ASSERT(split_bblks > 0);
3656 if ((error = xlog_bread(log, blk_no,
3659 offset = xlog_align(log, blk_no,
3663 * Note: this black magic still works with
3664 * large sector sizes (non-512) only because:
3665 * - we increased the buffer size originally
3666 * by 1 sector giving us enough extra space
3667 * for the second read;
3668 * - the log start is guaranteed to be sector
3670 * - we read the log end (LR header start)
3671 * _first_, then the log start (LR header end)
3672 * - order is important.
3674 bufaddr = XFS_BUF_PTR(dbp);
3675 XFS_BUF_SET_PTR(dbp,
3676 bufaddr + BBTOB(split_bblks),
3677 BBTOB(bblks - split_bblks));
3678 if ((error = xlog_bread(log, wrapped_hblks,
3679 bblks - split_bblks, dbp)))
3681 XFS_BUF_SET_PTR(dbp, bufaddr, h_size);
3683 offset = xlog_align(log, wrapped_hblks,
3684 bblks - split_bblks, dbp);
3686 xlog_unpack_data(rhead, offset, log);
3687 if ((error = xlog_recover_process_data(log, rhash,
3688 rhead, offset, pass)))
3693 ASSERT(blk_no >= log->l_logBBsize);
3694 blk_no -= log->l_logBBsize;
3696 /* read first part of physical log */
3697 while (blk_no < head_blk) {
3698 if ((error = xlog_bread(log, blk_no, hblks, hbp)))
3700 offset = xlog_align(log, blk_no, hblks, hbp);
3701 rhead = (xlog_rec_header_t *)offset;
3702 error = xlog_valid_rec_header(log, rhead, blk_no);
3705 bblks = (int)BTOBB(INT_GET(rhead->h_len, ARCH_CONVERT));
3706 if ((error = xlog_bread(log, blk_no+hblks, bblks, dbp)))
3708 offset = xlog_align(log, blk_no+hblks, bblks, dbp);
3709 xlog_unpack_data(rhead, offset, log);
3710 if ((error = xlog_recover_process_data(log, rhash,
3711 rhead, offset, pass)))
3713 blk_no += bblks + hblks;
3725 * Do the recovery of the log. We actually do this in two phases.
3726 * The two passes are necessary in order to implement the function
3727 * of cancelling a record written into the log. The first pass
3728 * determines those things which have been cancelled, and the
3729 * second pass replays log items normally except for those which
3730 * have been cancelled. The handling of the replay and cancellations
3731 * takes place in the log item type specific routines.
3733 * The table of items which have cancel records in the log is allocated
3734 * and freed at this level, since only here do we know when all of
3735 * the log recovery has been completed.
3738 xlog_do_log_recovery(
3740 xfs_daddr_t head_blk,
3741 xfs_daddr_t tail_blk)
3745 ASSERT(head_blk != tail_blk);
3748 * First do a pass to find all of the cancelled buf log items.
3749 * Store them in the buf_cancel_table for use in the second pass.
3751 log->l_buf_cancel_table =
3752 (xfs_buf_cancel_t **)kmem_zalloc(XLOG_BC_TABLE_SIZE *
3753 sizeof(xfs_buf_cancel_t*),
3755 error = xlog_do_recovery_pass(log, head_blk, tail_blk,
3756 XLOG_RECOVER_PASS1);
3758 kmem_free(log->l_buf_cancel_table,
3759 XLOG_BC_TABLE_SIZE * sizeof(xfs_buf_cancel_t*));
3760 log->l_buf_cancel_table = NULL;
3764 * Then do a second pass to actually recover the items in the log.
3765 * When it is complete free the table of buf cancel items.
3767 error = xlog_do_recovery_pass(log, head_blk, tail_blk,
3768 XLOG_RECOVER_PASS2);
3773 for (i = 0; i < XLOG_BC_TABLE_SIZE; i++)
3774 ASSERT(log->l_buf_cancel_table[i] == NULL);
3778 kmem_free(log->l_buf_cancel_table,
3779 XLOG_BC_TABLE_SIZE * sizeof(xfs_buf_cancel_t*));
3780 log->l_buf_cancel_table = NULL;
3786 * Do the actual recovery
3791 xfs_daddr_t head_blk,
3792 xfs_daddr_t tail_blk)
3799 * First replay the images in the log.
3801 error = xlog_do_log_recovery(log, head_blk, tail_blk);
3806 XFS_bflush(log->l_mp->m_ddev_targp);
3809 * If IO errors happened during recovery, bail out.
3811 if (XFS_FORCED_SHUTDOWN(log->l_mp)) {
3816 * We now update the tail_lsn since much of the recovery has completed
3817 * and there may be space available to use. If there were no extent
3818 * or iunlinks, we can free up the entire log and set the tail_lsn to
3819 * be the last_sync_lsn. This was set in xlog_find_tail to be the
3820 * lsn of the last known good LR on disk. If there are extent frees
3821 * or iunlinks they will have some entries in the AIL; so we look at
3822 * the AIL to determine how to set the tail_lsn.
3824 xlog_assign_tail_lsn(log->l_mp);
3827 * Now that we've finished replaying all buffer and inode
3828 * updates, re-read in the superblock.
3830 bp = xfs_getsb(log->l_mp, 0);
3833 xfsbdstrat(log->l_mp, bp);
3834 if ((error = xfs_iowait(bp))) {
3835 xfs_ioerror_alert("xlog_do_recover",
3836 log->l_mp, bp, XFS_BUF_ADDR(bp));
3842 /* Convert superblock from on-disk format */
3843 sbp = &log->l_mp->m_sb;
3844 xfs_xlatesb(XFS_BUF_TO_SBP(bp), sbp, 1, XFS_SB_ALL_BITS);
3845 ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC);
3846 ASSERT(XFS_SB_GOOD_VERSION(sbp));
3849 /* We've re-read the superblock so re-initialize per-cpu counters */
3850 xfs_icsb_reinit_counters(log->l_mp);
3852 xlog_recover_check_summary(log);
3854 /* Normal transactions can now occur */
3855 log->l_flags &= ~XLOG_ACTIVE_RECOVERY;
3860 * Perform recovery and re-initialize some log variables in xlog_find_tail.
3862 * Return error or zero.
3868 xfs_daddr_t head_blk, tail_blk;
3871 /* find the tail of the log */
3872 if ((error = xlog_find_tail(log, &head_blk, &tail_blk)))
3875 if (tail_blk != head_blk) {
3876 /* There used to be a comment here:
3878 * disallow recovery on read-only mounts. note -- mount
3879 * checks for ENOSPC and turns it into an intelligent
3881 * ...but this is no longer true. Now, unless you specify
3882 * NORECOVERY (in which case this function would never be
3883 * called), we just go ahead and recover. We do this all
3884 * under the vfs layer, so we can get away with it unless
3885 * the device itself is read-only, in which case we fail.
3887 if ((error = xfs_dev_is_read_only(log->l_mp, "recovery"))) {
3892 "Starting XFS recovery on filesystem: %s (logdev: %s)",
3893 log->l_mp->m_fsname, log->l_mp->m_logname ?
3894 log->l_mp->m_logname : "internal");
3896 error = xlog_do_recover(log, head_blk, tail_blk);
3897 log->l_flags |= XLOG_RECOVERY_NEEDED;
3903 * In the first part of recovery we replay inodes and buffers and build
3904 * up the list of extent free items which need to be processed. Here
3905 * we process the extent free items and clean up the on disk unlinked
3906 * inode lists. This is separated from the first part of recovery so
3907 * that the root and real-time bitmap inodes can be read in from disk in
3908 * between the two stages. This is necessary so that we can free space
3909 * in the real-time portion of the file system.
3912 xlog_recover_finish(
3917 * Now we're ready to do the transactions needed for the
3918 * rest of recovery. Start with completing all the extent
3919 * free intent records and then process the unlinked inode
3920 * lists. At this point, we essentially run in normal mode
3921 * except that we're still performing recovery actions
3922 * rather than accepting new requests.
3924 if (log->l_flags & XLOG_RECOVERY_NEEDED) {
3925 xlog_recover_process_efis(log);
3927 * Sync the log to get all the EFIs out of the AIL.
3928 * This isn't absolutely necessary, but it helps in
3929 * case the unlink transactions would have problems
3930 * pushing the EFIs out of the way.
3932 xfs_log_force(log->l_mp, (xfs_lsn_t)0,
3933 (XFS_LOG_FORCE | XFS_LOG_SYNC));
3935 if ( (mfsi_flags & XFS_MFSI_NOUNLINK) == 0 ) {
3936 xlog_recover_process_iunlinks(log);
3939 xlog_recover_check_summary(log);
3942 "Ending XFS recovery on filesystem: %s (logdev: %s)",
3943 log->l_mp->m_fsname, log->l_mp->m_logname ?
3944 log->l_mp->m_logname : "internal");
3945 log->l_flags &= ~XLOG_RECOVERY_NEEDED;
3948 "!Ending clean XFS mount for filesystem: %s\n",
3949 log->l_mp->m_fsname);
3957 * Read all of the agf and agi counters and check that they
3958 * are consistent with the superblock counters.
3961 xlog_recover_check_summary(
3969 xfs_daddr_t agfdaddr;
3970 xfs_daddr_t agidaddr;
3972 #ifdef XFS_LOUD_RECOVERY
3975 xfs_agnumber_t agno;
3976 __uint64_t freeblks;
3985 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
3986 agfdaddr = XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp));
3987 agfbp = xfs_buf_read(mp->m_ddev_targp, agfdaddr,
3988 XFS_FSS_TO_BB(mp, 1), 0);
3989 if (XFS_BUF_ISERROR(agfbp)) {
3990 xfs_ioerror_alert("xlog_recover_check_summary(agf)",
3991 mp, agfbp, agfdaddr);
3993 agfp = XFS_BUF_TO_AGF(agfbp);
3994 ASSERT(XFS_AGF_MAGIC == be32_to_cpu(agfp->agf_magicnum));
3995 ASSERT(XFS_AGF_GOOD_VERSION(be32_to_cpu(agfp->agf_versionnum)));
3996 ASSERT(be32_to_cpu(agfp->agf_seqno) == agno);
3998 freeblks += be32_to_cpu(agfp->agf_freeblks) +
3999 be32_to_cpu(agfp->agf_flcount);
4000 xfs_buf_relse(agfbp);
4002 agidaddr = XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp));
4003 agibp = xfs_buf_read(mp->m_ddev_targp, agidaddr,
4004 XFS_FSS_TO_BB(mp, 1), 0);
4005 if (XFS_BUF_ISERROR(agibp)) {
4006 xfs_ioerror_alert("xlog_recover_check_summary(agi)",
4007 mp, agibp, agidaddr);
4009 agip = XFS_BUF_TO_AGI(agibp);
4010 ASSERT(XFS_AGI_MAGIC == be32_to_cpu(agip->agi_magicnum));
4011 ASSERT(XFS_AGI_GOOD_VERSION(be32_to_cpu(agip->agi_versionnum)));
4012 ASSERT(be32_to_cpu(agip->agi_seqno) == agno);
4014 itotal += be32_to_cpu(agip->agi_count);
4015 ifree += be32_to_cpu(agip->agi_freecount);
4016 xfs_buf_relse(agibp);
4019 sbbp = xfs_getsb(mp, 0);
4020 #ifdef XFS_LOUD_RECOVERY
4022 xfs_xlatesb(XFS_BUF_TO_SBP(sbbp), sbp, 1, XFS_SB_ALL_BITS);
4024 "xlog_recover_check_summary: sb_icount %Lu itotal %Lu",
4025 sbp->sb_icount, itotal);
4027 "xlog_recover_check_summary: sb_ifree %Lu itotal %Lu",
4028 sbp->sb_ifree, ifree);
4030 "xlog_recover_check_summary: sb_fdblocks %Lu freeblks %Lu",
4031 sbp->sb_fdblocks, freeblks);
4034 * This is turned off until I account for the allocation
4035 * btree blocks which live in free space.
4037 ASSERT(sbp->sb_icount == itotal);
4038 ASSERT(sbp->sb_ifree == ifree);
4039 ASSERT(sbp->sb_fdblocks == freeblks);
4042 xfs_buf_relse(sbbp);
projects / linux-2.6 / blob