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
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.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_ialloc.h"
39 #include "xfs_btree.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_trans_space.h"
48 #include "xfs_utils.h"
49 #include "xfs_iomap.h"
50 #include "xfs_trace.h"
53 #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \
55 #define XFS_STRAT_WRITE_IMAPS 2
56 #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP
62 xfs_bmbt_irec_t *imap,
64 int imaps, /* Number of imap entries */
65 int iomaps, /* Number of iomap entries */
68 xfs_mount_t *mp = ip->i_mount;
70 xfs_fsblock_t start_block;
73 for (pbm = 0; imaps && pbm < iomaps; imaps--, iomapp++, imap++, pbm++) {
74 iomapp->iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff);
75 iomapp->iomap_delta = offset - iomapp->iomap_offset;
76 iomapp->iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount);
77 iomapp->iomap_flags = flags;
79 if (XFS_IS_REALTIME_INODE(ip)) {
80 iomapp->iomap_flags |= IOMAP_REALTIME;
81 iomapp->iomap_target = mp->m_rtdev_targp;
83 iomapp->iomap_target = mp->m_ddev_targp;
85 start_block = imap->br_startblock;
86 if (start_block == HOLESTARTBLOCK) {
87 iomapp->iomap_bn = IOMAP_DADDR_NULL;
88 iomapp->iomap_flags |= IOMAP_HOLE;
89 } else if (start_block == DELAYSTARTBLOCK) {
90 iomapp->iomap_bn = IOMAP_DADDR_NULL;
91 iomapp->iomap_flags |= IOMAP_DELAY;
93 iomapp->iomap_bn = xfs_fsb_to_db(ip, start_block);
94 if (ISUNWRITTEN(imap))
95 iomapp->iomap_flags |= IOMAP_UNWRITTEN;
98 offset += iomapp->iomap_bsize - iomapp->iomap_delta;
100 return pbm; /* Return the number filled */
112 xfs_mount_t *mp = ip->i_mount;
113 xfs_fileoff_t offset_fsb, end_fsb;
116 xfs_bmbt_irec_t imap;
121 ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
123 if (XFS_FORCED_SHUTDOWN(mp))
124 return XFS_ERROR(EIO);
126 trace_xfs_iomap_enter(ip, offset, count, flags, NULL);
128 switch (flags & (BMAPI_READ | BMAPI_WRITE | BMAPI_ALLOCATE)) {
130 lockmode = xfs_ilock_map_shared(ip);
131 bmapi_flags = XFS_BMAPI_ENTIRE;
134 lockmode = XFS_ILOCK_EXCL;
135 if (flags & BMAPI_IGNSTATE)
136 bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE;
137 xfs_ilock(ip, lockmode);
140 lockmode = XFS_ILOCK_SHARED;
141 bmapi_flags = XFS_BMAPI_ENTIRE;
143 /* Attempt non-blocking lock */
144 if (flags & BMAPI_TRYLOCK) {
145 if (!xfs_ilock_nowait(ip, lockmode))
146 return XFS_ERROR(EAGAIN);
148 xfs_ilock(ip, lockmode);
155 ASSERT(offset <= mp->m_maxioffset);
156 if ((xfs_fsize_t)offset + count > mp->m_maxioffset)
157 count = mp->m_maxioffset - offset;
158 end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);
159 offset_fsb = XFS_B_TO_FSBT(mp, offset);
161 error = xfs_bmapi(NULL, ip, offset_fsb,
162 (xfs_filblks_t)(end_fsb - offset_fsb),
163 bmapi_flags, NULL, 0, &imap,
164 &nimaps, NULL, NULL);
169 switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) {
171 /* If we found an extent, return it */
173 (imap.br_startblock != HOLESTARTBLOCK) &&
174 (imap.br_startblock != DELAYSTARTBLOCK)) {
175 trace_xfs_iomap_found(ip, offset, count, flags, &imap);
179 if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) {
180 error = xfs_iomap_write_direct(ip, offset, count, flags,
181 &imap, &nimaps, nimaps);
183 error = xfs_iomap_write_delay(ip, offset, count, flags,
187 trace_xfs_iomap_alloc(ip, offset, count, flags, &imap);
189 iomap_flags = IOMAP_NEW;
192 /* If we found an extent, return it */
193 xfs_iunlock(ip, lockmode);
196 if (nimaps && !isnullstartblock(imap.br_startblock)) {
197 trace_xfs_iomap_found(ip, offset, count, flags, &imap);
201 error = xfs_iomap_write_allocate(ip, offset, count,
207 *niomaps = xfs_imap_to_bmap(ip, offset, &imap,
208 iomapp, nimaps, *niomaps, iomap_flags);
209 } else if (niomaps) {
215 xfs_iunlock(ip, lockmode);
216 return XFS_ERROR(error);
221 xfs_iomap_eof_align_last_fsb(
224 xfs_extlen_t extsize,
225 xfs_fileoff_t *last_fsb)
227 xfs_fileoff_t new_last_fsb = 0;
231 if (XFS_IS_REALTIME_INODE(ip))
234 * If mounted with the "-o swalloc" option, roundup the allocation
235 * request to a stripe width boundary if the file size is >=
236 * stripe width and we are allocating past the allocation eof.
238 else if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC) &&
239 (ip->i_size >= XFS_FSB_TO_B(mp, mp->m_swidth)))
240 new_last_fsb = roundup_64(*last_fsb, mp->m_swidth);
242 * Roundup the allocation request to a stripe unit (m_dalign) boundary
243 * if the file size is >= stripe unit size, and we are allocating past
244 * the allocation eof.
246 else if (mp->m_dalign && (ip->i_size >= XFS_FSB_TO_B(mp, mp->m_dalign)))
247 new_last_fsb = roundup_64(*last_fsb, mp->m_dalign);
250 * Always round up the allocation request to an extent boundary
251 * (when file on a real-time subvolume or has di_extsize hint).
255 align = roundup_64(new_last_fsb, extsize);
258 new_last_fsb = roundup_64(*last_fsb, align);
262 error = xfs_bmap_eof(ip, new_last_fsb, XFS_DATA_FORK, &eof);
266 *last_fsb = new_last_fsb;
272 xfs_cmn_err_fsblock_zero(
274 xfs_bmbt_irec_t *imap)
276 xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount,
277 "Access to block zero in inode %llu "
278 "start_block: %llx start_off: %llx "
279 "blkcnt: %llx extent-state: %x\n",
280 (unsigned long long)ip->i_ino,
281 (unsigned long long)imap->br_startblock,
282 (unsigned long long)imap->br_startoff,
283 (unsigned long long)imap->br_blockcount,
289 xfs_iomap_write_direct(
294 xfs_bmbt_irec_t *ret_imap,
298 xfs_mount_t *mp = ip->i_mount;
299 xfs_fileoff_t offset_fsb;
300 xfs_fileoff_t last_fsb;
301 xfs_filblks_t count_fsb, resaligned;
302 xfs_fsblock_t firstfsb;
303 xfs_extlen_t extsz, temp;
309 xfs_bmbt_irec_t imap;
310 xfs_bmap_free_t free_list;
311 uint qblocks, resblks, resrtextents;
316 * Make sure that the dquots are there. This doesn't hold
317 * the ilock across a disk read.
319 error = xfs_qm_dqattach_locked(ip, 0);
321 return XFS_ERROR(error);
323 rt = XFS_IS_REALTIME_INODE(ip);
324 extsz = xfs_get_extsz_hint(ip);
326 offset_fsb = XFS_B_TO_FSBT(mp, offset);
327 last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
328 if ((offset + count) > ip->i_size) {
329 error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb);
333 if (found && (ret_imap->br_startblock == HOLESTARTBLOCK))
334 last_fsb = MIN(last_fsb, (xfs_fileoff_t)
335 ret_imap->br_blockcount +
336 ret_imap->br_startoff);
338 count_fsb = last_fsb - offset_fsb;
339 ASSERT(count_fsb > 0);
341 resaligned = count_fsb;
342 if (unlikely(extsz)) {
343 if ((temp = do_mod(offset_fsb, extsz)))
345 if ((temp = do_mod(resaligned, extsz)))
346 resaligned += extsz - temp;
350 resrtextents = qblocks = resaligned;
351 resrtextents /= mp->m_sb.sb_rextsize;
352 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
353 quota_flag = XFS_QMOPT_RES_RTBLKS;
356 resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned);
357 quota_flag = XFS_QMOPT_RES_REGBLKS;
361 * Allocate and setup the transaction
363 xfs_iunlock(ip, XFS_ILOCK_EXCL);
364 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
365 error = xfs_trans_reserve(tp, resblks,
366 XFS_WRITE_LOG_RES(mp), resrtextents,
367 XFS_TRANS_PERM_LOG_RES,
368 XFS_WRITE_LOG_COUNT);
370 * Check for running out of space, note: need lock to return
373 xfs_trans_cancel(tp, 0);
374 xfs_ilock(ip, XFS_ILOCK_EXCL);
378 error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, 0, quota_flag);
382 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
383 xfs_trans_ihold(tp, ip);
385 bmapi_flag = XFS_BMAPI_WRITE;
386 if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz))
387 bmapi_flag |= XFS_BMAPI_PREALLOC;
390 * Issue the xfs_bmapi() call to allocate the blocks
392 xfs_bmap_init(&free_list, &firstfsb);
394 error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, bmapi_flag,
395 &firstfsb, 0, &imap, &nimaps, &free_list, NULL);
400 * Complete the transaction
402 error = xfs_bmap_finish(&tp, &free_list, &committed);
405 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
410 * Copy any maps to caller's array and return any error.
417 if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) {
418 error = xfs_cmn_err_fsblock_zero(ip, &imap);
426 error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
427 xfs_bmap_cancel(&free_list);
428 xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag);
430 error1: /* Just cancel transaction */
431 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
432 *nmaps = 0; /* nothing set-up here */
435 return XFS_ERROR(error);
439 * If the caller is doing a write at the end of the file, then extend the
440 * allocation out to the file system's write iosize. We clean up any extra
441 * space left over when the file is closed in xfs_inactive().
444 xfs_iomap_eof_want_preallocate(
450 xfs_bmbt_irec_t *imap,
454 xfs_fileoff_t start_fsb;
455 xfs_filblks_t count_fsb;
456 xfs_fsblock_t firstblock;
460 if ((offset + count) <= ip->i_size)
464 * If there are any real blocks past eof, then don't
465 * do any speculative allocation.
467 start_fsb = XFS_B_TO_FSBT(mp, ((xfs_ufsize_t)(offset + count - 1)));
468 count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
469 while (count_fsb > 0) {
471 firstblock = NULLFSBLOCK;
472 error = xfs_bmapi(NULL, ip, start_fsb, count_fsb, 0,
473 &firstblock, 0, imap, &imaps, NULL, NULL);
476 for (n = 0; n < imaps; n++) {
477 if ((imap[n].br_startblock != HOLESTARTBLOCK) &&
478 (imap[n].br_startblock != DELAYSTARTBLOCK))
480 start_fsb += imap[n].br_blockcount;
481 count_fsb -= imap[n].br_blockcount;
489 xfs_iomap_write_delay(
494 xfs_bmbt_irec_t *ret_imap,
497 xfs_mount_t *mp = ip->i_mount;
498 xfs_fileoff_t offset_fsb;
499 xfs_fileoff_t last_fsb;
500 xfs_off_t aligned_offset;
501 xfs_fileoff_t ioalign;
502 xfs_fsblock_t firstblock;
505 xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS];
506 int prealloc, flushed = 0;
509 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
512 * Make sure that the dquots are there. This doesn't hold
513 * the ilock across a disk read.
515 error = xfs_qm_dqattach_locked(ip, 0);
517 return XFS_ERROR(error);
519 extsz = xfs_get_extsz_hint(ip);
520 offset_fsb = XFS_B_TO_FSBT(mp, offset);
522 error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count,
523 ioflag, imap, XFS_WRITE_IMAPS, &prealloc);
529 aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1));
530 ioalign = XFS_B_TO_FSBT(mp, aligned_offset);
531 last_fsb = ioalign + mp->m_writeio_blocks;
533 last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
536 if (prealloc || extsz) {
537 error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb);
542 nimaps = XFS_WRITE_IMAPS;
543 firstblock = NULLFSBLOCK;
544 error = xfs_bmapi(NULL, ip, offset_fsb,
545 (xfs_filblks_t)(last_fsb - offset_fsb),
546 XFS_BMAPI_DELAY | XFS_BMAPI_WRITE |
547 XFS_BMAPI_ENTIRE, &firstblock, 1, imap,
548 &nimaps, NULL, NULL);
549 if (error && (error != ENOSPC))
550 return XFS_ERROR(error);
553 * If bmapi returned us nothing, and if we didn't get back EDQUOT,
554 * then we must have run out of space - flush all other inodes with
555 * delalloc blocks and retry without EOF preallocation.
558 trace_xfs_delalloc_enospc(ip, offset, count);
560 return XFS_ERROR(ENOSPC);
562 xfs_iunlock(ip, XFS_ILOCK_EXCL);
563 xfs_flush_inodes(ip);
564 xfs_ilock(ip, XFS_ILOCK_EXCL);
572 if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip)))
573 return xfs_cmn_err_fsblock_zero(ip, &imap[0]);
582 * Pass in a delayed allocate extent, convert it to real extents;
583 * return to the caller the extent we create which maps on top of
584 * the originating callers request.
586 * Called without a lock on the inode.
588 * We no longer bother to look at the incoming map - all we have to
589 * guarantee is that whatever we allocate fills the required range.
592 xfs_iomap_write_allocate(
596 xfs_bmbt_irec_t *map,
599 xfs_mount_t *mp = ip->i_mount;
600 xfs_fileoff_t offset_fsb, last_block;
601 xfs_fileoff_t end_fsb, map_start_fsb;
602 xfs_fsblock_t first_block;
603 xfs_bmap_free_t free_list;
604 xfs_filblks_t count_fsb;
605 xfs_bmbt_irec_t imap;
607 int nimaps, committed;
614 * Make sure that the dquots are there.
616 error = xfs_qm_dqattach(ip, 0);
618 return XFS_ERROR(error);
620 offset_fsb = XFS_B_TO_FSBT(mp, offset);
621 count_fsb = map->br_blockcount;
622 map_start_fsb = map->br_startoff;
624 XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb));
626 while (count_fsb != 0) {
628 * Set up a transaction with which to allocate the
629 * backing store for the file. Do allocations in a
630 * loop until we get some space in the range we are
631 * interested in. The other space that might be allocated
632 * is in the delayed allocation extent on which we sit
633 * but before our buffer starts.
637 while (nimaps == 0) {
638 tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE);
639 tp->t_flags |= XFS_TRANS_RESERVE;
640 nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK);
641 error = xfs_trans_reserve(tp, nres,
642 XFS_WRITE_LOG_RES(mp),
643 0, XFS_TRANS_PERM_LOG_RES,
644 XFS_WRITE_LOG_COUNT);
646 xfs_trans_cancel(tp, 0);
647 return XFS_ERROR(error);
649 xfs_ilock(ip, XFS_ILOCK_EXCL);
650 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
651 xfs_trans_ihold(tp, ip);
653 xfs_bmap_init(&free_list, &first_block);
656 * it is possible that the extents have changed since
657 * we did the read call as we dropped the ilock for a
658 * while. We have to be careful about truncates or hole
659 * punchs here - we are not allowed to allocate
660 * non-delalloc blocks here.
662 * The only protection against truncation is the pages
663 * for the range we are being asked to convert are
664 * locked and hence a truncate will block on them
667 * As a result, if we go beyond the range we really
668 * need and hit an delalloc extent boundary followed by
669 * a hole while we have excess blocks in the map, we
670 * will fill the hole incorrectly and overrun the
671 * transaction reservation.
673 * Using a single map prevents this as we are forced to
674 * check each map we look for overlap with the desired
675 * range and abort as soon as we find it. Also, given
676 * that we only return a single map, having one beyond
677 * what we can return is probably a bit silly.
679 * We also need to check that we don't go beyond EOF;
680 * this is a truncate optimisation as a truncate sets
681 * the new file size before block on the pages we
682 * currently have locked under writeback. Because they
683 * are about to be tossed, we don't need to write them
687 end_fsb = XFS_B_TO_FSB(mp, ip->i_size);
688 error = xfs_bmap_last_offset(NULL, ip, &last_block,
693 last_block = XFS_FILEOFF_MAX(last_block, end_fsb);
694 if ((map_start_fsb + count_fsb) > last_block) {
695 count_fsb = last_block - map_start_fsb;
696 if (count_fsb == 0) {
702 /* Go get the actual blocks */
703 error = xfs_bmapi(tp, ip, map_start_fsb, count_fsb,
704 XFS_BMAPI_WRITE, &first_block, 1,
705 &imap, &nimaps, &free_list, NULL);
709 error = xfs_bmap_finish(&tp, &free_list, &committed);
713 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
717 xfs_iunlock(ip, XFS_ILOCK_EXCL);
721 * See if we were able to allocate an extent that
722 * covers at least part of the callers request
724 if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))
725 return xfs_cmn_err_fsblock_zero(ip, &imap);
727 if ((offset_fsb >= imap.br_startoff) &&
728 (offset_fsb < (imap.br_startoff +
729 imap.br_blockcount))) {
732 XFS_STATS_INC(xs_xstrat_quick);
737 * So far we have not mapped the requested part of the
738 * file, just surrounding data, try again.
740 count_fsb -= imap.br_blockcount;
741 map_start_fsb = imap.br_startoff + imap.br_blockcount;
745 xfs_bmap_cancel(&free_list);
746 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
748 xfs_iunlock(ip, XFS_ILOCK_EXCL);
749 return XFS_ERROR(error);
753 xfs_iomap_write_unwritten(
758 xfs_mount_t *mp = ip->i_mount;
759 xfs_fileoff_t offset_fsb;
760 xfs_filblks_t count_fsb;
761 xfs_filblks_t numblks_fsb;
762 xfs_fsblock_t firstfsb;
765 xfs_bmbt_irec_t imap;
766 xfs_bmap_free_t free_list;
771 trace_xfs_unwritten_convert(ip, offset, count);
773 offset_fsb = XFS_B_TO_FSBT(mp, offset);
774 count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);
775 count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb);
778 * Reserve enough blocks in this transaction for two complete extent
779 * btree splits. We may be converting the middle part of an unwritten
780 * extent and in this case we will insert two new extents in the btree
781 * each of which could cause a full split.
783 * This reservation amount will be used in the first call to
784 * xfs_bmbt_split() to select an AG with enough space to satisfy the
785 * rest of the operation.
787 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1;
791 * set up a transaction to convert the range of extents
792 * from unwritten to real. Do allocations in a loop until
793 * we have covered the range passed in.
795 * Note that we open code the transaction allocation here
796 * to pass KM_NOFS--we can't risk to recursing back into
797 * the filesystem here as we might be asked to write out
798 * the same inode that we complete here and might deadlock
801 xfs_wait_for_freeze(mp, SB_FREEZE_TRANS);
802 tp = _xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE, KM_NOFS);
803 tp->t_flags |= XFS_TRANS_RESERVE;
804 error = xfs_trans_reserve(tp, resblks,
805 XFS_WRITE_LOG_RES(mp), 0,
806 XFS_TRANS_PERM_LOG_RES,
807 XFS_WRITE_LOG_COUNT);
809 xfs_trans_cancel(tp, 0);
810 return XFS_ERROR(error);
813 xfs_ilock(ip, XFS_ILOCK_EXCL);
814 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
815 xfs_trans_ihold(tp, ip);
818 * Modify the unwritten extent state of the buffer.
820 xfs_bmap_init(&free_list, &firstfsb);
822 error = xfs_bmapi(tp, ip, offset_fsb, count_fsb,
823 XFS_BMAPI_WRITE|XFS_BMAPI_CONVERT, &firstfsb,
824 1, &imap, &nimaps, &free_list, NULL);
826 goto error_on_bmapi_transaction;
828 error = xfs_bmap_finish(&(tp), &(free_list), &committed);
830 goto error_on_bmapi_transaction;
832 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
833 xfs_iunlock(ip, XFS_ILOCK_EXCL);
835 return XFS_ERROR(error);
837 if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))
838 return xfs_cmn_err_fsblock_zero(ip, &imap);
840 if ((numblks_fsb = imap.br_blockcount) == 0) {
842 * The numblks_fsb value should always get
843 * smaller, otherwise the loop is stuck.
845 ASSERT(imap.br_blockcount);
848 offset_fsb += numblks_fsb;
849 count_fsb -= numblks_fsb;
850 } while (count_fsb > 0);
854 error_on_bmapi_transaction:
855 xfs_bmap_cancel(&free_list);
856 xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT));
857 xfs_iunlock(ip, XFS_ILOCK_EXCL);
858 return XFS_ERROR(error);