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
21 #include "xfs_trans.h"
24 #include "xfs_alloc.h"
25 #include "xfs_quota.h"
26 #include "xfs_mount.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_alloc_btree.h"
29 #include "xfs_ialloc_btree.h"
30 #include "xfs_dinode.h"
31 #include "xfs_inode.h"
32 #include "xfs_inode_item.h"
33 #include "xfs_btree.h"
35 #include "xfs_rtalloc.h"
36 #include "xfs_error.h"
37 #include "xfs_itable.h"
39 #include "xfs_buf_item.h"
40 #include "xfs_trans_space.h"
41 #include "xfs_utils.h"
42 #include "xfs_iomap.h"
43 #include "xfs_trace.h"
44 #include "xfs_icache.h"
47 #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \
49 #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP
52 xfs_iomap_eof_align_last_fsb(
56 xfs_fileoff_t
*last_fsb
)
58 xfs_fileoff_t new_last_fsb
= 0;
59 xfs_extlen_t align
= 0;
62 if (!XFS_IS_REALTIME_INODE(ip
)) {
64 * Round up the allocation request to a stripe unit
65 * (m_dalign) boundary if the file size is >= stripe unit
66 * size, and we are allocating past the allocation eof.
68 * If mounted with the "-o swalloc" option the alignment is
69 * increased from the strip unit size to the stripe width.
71 if (mp
->m_swidth
&& (mp
->m_flags
& XFS_MOUNT_SWALLOC
))
73 else if (mp
->m_dalign
)
76 if (align
&& XFS_ISIZE(ip
) >= XFS_FSB_TO_B(mp
, align
))
77 new_last_fsb
= roundup_64(*last_fsb
, align
);
81 * Always round up the allocation request to an extent boundary
82 * (when file on a real-time subvolume or has di_extsize hint).
86 align
= roundup_64(new_last_fsb
, extsize
);
89 new_last_fsb
= roundup_64(*last_fsb
, align
);
93 error
= xfs_bmap_eof(ip
, new_last_fsb
, XFS_DATA_FORK
, &eof
);
97 *last_fsb
= new_last_fsb
;
103 xfs_alert_fsblock_zero(
105 xfs_bmbt_irec_t
*imap
)
107 xfs_alert_tag(ip
->i_mount
, XFS_PTAG_FSBLOCK_ZERO
,
108 "Access to block zero in inode %llu "
109 "start_block: %llx start_off: %llx "
110 "blkcnt: %llx extent-state: %x\n",
111 (unsigned long long)ip
->i_ino
,
112 (unsigned long long)imap
->br_startblock
,
113 (unsigned long long)imap
->br_startoff
,
114 (unsigned long long)imap
->br_blockcount
,
120 xfs_iomap_write_direct(
124 xfs_bmbt_irec_t
*imap
,
127 xfs_mount_t
*mp
= ip
->i_mount
;
128 xfs_fileoff_t offset_fsb
;
129 xfs_fileoff_t last_fsb
;
130 xfs_filblks_t count_fsb
, resaligned
;
131 xfs_fsblock_t firstfsb
;
132 xfs_extlen_t extsz
, temp
;
138 xfs_bmap_free_t free_list
;
139 uint qblocks
, resblks
, resrtextents
;
143 error
= xfs_qm_dqattach(ip
, 0);
145 return XFS_ERROR(error
);
147 rt
= XFS_IS_REALTIME_INODE(ip
);
148 extsz
= xfs_get_extsz_hint(ip
);
150 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
151 last_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)(offset
+ count
)));
152 if ((offset
+ count
) > XFS_ISIZE(ip
)) {
153 error
= xfs_iomap_eof_align_last_fsb(mp
, ip
, extsz
, &last_fsb
);
155 return XFS_ERROR(error
);
157 if (nmaps
&& (imap
->br_startblock
== HOLESTARTBLOCK
))
158 last_fsb
= MIN(last_fsb
, (xfs_fileoff_t
)
159 imap
->br_blockcount
+
162 count_fsb
= last_fsb
- offset_fsb
;
163 ASSERT(count_fsb
> 0);
165 resaligned
= count_fsb
;
166 if (unlikely(extsz
)) {
167 if ((temp
= do_mod(offset_fsb
, extsz
)))
169 if ((temp
= do_mod(resaligned
, extsz
)))
170 resaligned
+= extsz
- temp
;
174 resrtextents
= qblocks
= resaligned
;
175 resrtextents
/= mp
->m_sb
.sb_rextsize
;
176 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
177 quota_flag
= XFS_QMOPT_RES_RTBLKS
;
180 resblks
= qblocks
= XFS_DIOSTRAT_SPACE_RES(mp
, resaligned
);
181 quota_flag
= XFS_QMOPT_RES_REGBLKS
;
185 * Allocate and setup the transaction
187 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
188 error
= xfs_trans_reserve(tp
, resblks
,
189 XFS_WRITE_LOG_RES(mp
), resrtextents
,
190 XFS_TRANS_PERM_LOG_RES
,
191 XFS_WRITE_LOG_COUNT
);
193 * Check for running out of space, note: need lock to return
196 xfs_trans_cancel(tp
, 0);
197 return XFS_ERROR(error
);
200 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
202 error
= xfs_trans_reserve_quota_nblks(tp
, ip
, qblocks
, 0, quota_flag
);
204 goto out_trans_cancel
;
206 xfs_trans_ijoin(tp
, ip
, 0);
209 if (offset
< XFS_ISIZE(ip
) || extsz
)
210 bmapi_flag
|= XFS_BMAPI_PREALLOC
;
213 * From this point onwards we overwrite the imap pointer that the
216 xfs_bmap_init(&free_list
, &firstfsb
);
218 error
= xfs_bmapi_write(tp
, ip
, offset_fsb
, count_fsb
, bmapi_flag
,
219 &firstfsb
, 0, imap
, &nimaps
, &free_list
);
221 goto out_bmap_cancel
;
224 * Complete the transaction
226 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
228 goto out_bmap_cancel
;
229 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
234 * Copy any maps to caller's array and return any error.
237 error
= XFS_ERROR(ENOSPC
);
241 if (!(imap
->br_startblock
|| XFS_IS_REALTIME_INODE(ip
)))
242 error
= xfs_alert_fsblock_zero(ip
, imap
);
245 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
249 xfs_bmap_cancel(&free_list
);
250 xfs_trans_unreserve_quota_nblks(tp
, ip
, (long)qblocks
, 0, quota_flag
);
252 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
257 * If the caller is doing a write at the end of the file, then extend the
258 * allocation out to the file system's write iosize. We clean up any extra
259 * space left over when the file is closed in xfs_inactive().
261 * If we find we already have delalloc preallocation beyond EOF, don't do more
262 * preallocation as it it not needed.
265 xfs_iomap_eof_want_preallocate(
270 xfs_bmbt_irec_t
*imap
,
274 xfs_fileoff_t start_fsb
;
275 xfs_filblks_t count_fsb
;
276 xfs_fsblock_t firstblock
;
278 int found_delalloc
= 0;
281 if (offset
+ count
<= XFS_ISIZE(ip
))
285 * If there are any real blocks past eof, then don't
286 * do any speculative allocation.
288 start_fsb
= XFS_B_TO_FSBT(mp
, ((xfs_ufsize_t
)(offset
+ count
- 1)));
289 count_fsb
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
290 while (count_fsb
> 0) {
292 firstblock
= NULLFSBLOCK
;
293 error
= xfs_bmapi_read(ip
, start_fsb
, count_fsb
, imap
, &imaps
,
297 for (n
= 0; n
< imaps
; n
++) {
298 if ((imap
[n
].br_startblock
!= HOLESTARTBLOCK
) &&
299 (imap
[n
].br_startblock
!= DELAYSTARTBLOCK
))
301 start_fsb
+= imap
[n
].br_blockcount
;
302 count_fsb
-= imap
[n
].br_blockcount
;
304 if (imap
[n
].br_startblock
== DELAYSTARTBLOCK
)
314 * Determine the initial size of the preallocation. We are beyond the current
315 * EOF here, but we need to take into account whether this is a sparse write or
316 * an extending write when determining the preallocation size. Hence we need to
317 * look up the extent that ends at the current write offset and use the result
318 * to determine the preallocation size.
320 * If the extent is a hole, then preallocation is essentially disabled.
321 * Otherwise we take the size of the preceeding data extent as the basis for the
322 * preallocation size. If the size of the extent is greater than half the
323 * maximum extent length, then use the current offset as the basis. This ensures
324 * that for large files the preallocation size always extends to MAXEXTLEN
325 * rather than falling short due to things like stripe unit/width alignment of
329 xfs_iomap_eof_prealloc_initial_size(
330 struct xfs_mount
*mp
,
331 struct xfs_inode
*ip
,
333 xfs_bmbt_irec_t
*imap
,
336 xfs_fileoff_t start_fsb
;
340 ASSERT(nimaps
>= imaps
);
342 /* if we are using a specific prealloc size, return now */
343 if (mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
)
347 * As we write multiple pages, the offset will always align to the
348 * start of a page and hence point to a hole at EOF. i.e. if the size is
349 * 4096 bytes, we only have one block at FSB 0, but XFS_B_TO_FSB(4096)
350 * will return FSB 1. Hence if there are blocks in the file, we want to
351 * point to the block prior to the EOF block and not the hole that maps
352 * directly at @offset.
354 start_fsb
= XFS_B_TO_FSB(mp
, offset
);
357 error
= xfs_bmapi_read(ip
, start_fsb
, 1, imap
, &imaps
, XFS_BMAPI_ENTIRE
);
362 if (imap
[0].br_startblock
== HOLESTARTBLOCK
)
364 if (imap
[0].br_blockcount
<= (MAXEXTLEN
>> 1))
365 return imap
[0].br_blockcount
<< 1;
366 return XFS_B_TO_FSB(mp
, offset
);
370 * If we don't have a user specified preallocation size, dynamically increase
371 * the preallocation size as the size of the file grows. Cap the maximum size
372 * at a single extent or less if the filesystem is near full. The closer the
373 * filesystem is to full, the smaller the maximum prealocation.
376 xfs_iomap_prealloc_size(
377 struct xfs_mount
*mp
,
378 struct xfs_inode
*ip
,
380 struct xfs_bmbt_irec
*imap
,
383 xfs_fsblock_t alloc_blocks
= 0;
387 alloc_blocks
= xfs_iomap_eof_prealloc_initial_size(mp
, ip
, offset
,
393 * MAXEXTLEN is not a power of two value but we round the prealloc down
394 * to the nearest power of two value after throttling. To prevent the
395 * round down from unconditionally reducing the maximum supported prealloc
396 * size, we round up first, apply appropriate throttling, round down and
397 * cap the value to MAXEXTLEN.
399 alloc_blocks
= XFS_FILEOFF_MIN(roundup_pow_of_two(MAXEXTLEN
),
402 xfs_icsb_sync_counters(mp
, XFS_ICSB_LAZY_COUNT
);
403 freesp
= mp
->m_sb
.sb_fdblocks
;
404 if (freesp
< mp
->m_low_space
[XFS_LOWSP_5_PCNT
]) {
406 if (freesp
< mp
->m_low_space
[XFS_LOWSP_4_PCNT
])
408 if (freesp
< mp
->m_low_space
[XFS_LOWSP_3_PCNT
])
410 if (freesp
< mp
->m_low_space
[XFS_LOWSP_2_PCNT
])
412 if (freesp
< mp
->m_low_space
[XFS_LOWSP_1_PCNT
])
416 alloc_blocks
>>= shift
;
418 * rounddown_pow_of_two() returns an undefined result if we pass in
422 alloc_blocks
= rounddown_pow_of_two(alloc_blocks
);
423 if (alloc_blocks
> MAXEXTLEN
)
424 alloc_blocks
= MAXEXTLEN
;
427 * If we are still trying to allocate more space than is
428 * available, squash the prealloc hard. This can happen if we
429 * have a large file on a small filesystem and the above
430 * lowspace thresholds are smaller than MAXEXTLEN.
432 while (alloc_blocks
&& alloc_blocks
>= freesp
)
436 if (alloc_blocks
< mp
->m_writeio_blocks
)
437 alloc_blocks
= mp
->m_writeio_blocks
;
443 xfs_iomap_write_delay(
447 xfs_bmbt_irec_t
*ret_imap
)
449 xfs_mount_t
*mp
= ip
->i_mount
;
450 xfs_fileoff_t offset_fsb
;
451 xfs_fileoff_t last_fsb
;
452 xfs_off_t aligned_offset
;
453 xfs_fileoff_t ioalign
;
456 xfs_bmbt_irec_t imap
[XFS_WRITE_IMAPS
];
460 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
463 * Make sure that the dquots are there. This doesn't hold
464 * the ilock across a disk read.
466 error
= xfs_qm_dqattach_locked(ip
, 0);
468 return XFS_ERROR(error
);
470 extsz
= xfs_get_extsz_hint(ip
);
471 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
473 error
= xfs_iomap_eof_want_preallocate(mp
, ip
, offset
, count
,
474 imap
, XFS_WRITE_IMAPS
, &prealloc
);
480 xfs_fsblock_t alloc_blocks
;
482 alloc_blocks
= xfs_iomap_prealloc_size(mp
, ip
, offset
, imap
,
485 aligned_offset
= XFS_WRITEIO_ALIGN(mp
, (offset
+ count
- 1));
486 ioalign
= XFS_B_TO_FSBT(mp
, aligned_offset
);
487 last_fsb
= ioalign
+ alloc_blocks
;
489 last_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)(offset
+ count
)));
492 if (prealloc
|| extsz
) {
493 error
= xfs_iomap_eof_align_last_fsb(mp
, ip
, extsz
, &last_fsb
);
499 * Make sure preallocation does not create extents beyond the range we
500 * actually support in this filesystem.
502 if (last_fsb
> XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
))
503 last_fsb
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
505 ASSERT(last_fsb
> offset_fsb
);
507 nimaps
= XFS_WRITE_IMAPS
;
508 error
= xfs_bmapi_delay(ip
, offset_fsb
, last_fsb
- offset_fsb
,
509 imap
, &nimaps
, XFS_BMAPI_ENTIRE
);
516 return XFS_ERROR(error
);
520 * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry
521 * without EOF preallocation.
524 trace_xfs_delalloc_enospc(ip
, offset
, count
);
530 return XFS_ERROR(error
? error
: ENOSPC
);
533 if (!(imap
[0].br_startblock
|| XFS_IS_REALTIME_INODE(ip
)))
534 return xfs_alert_fsblock_zero(ip
, &imap
[0]);
537 * Tag the inode as speculatively preallocated so we can reclaim this
538 * space on demand, if necessary.
541 xfs_inode_set_eofblocks_tag(ip
);
548 * Pass in a delayed allocate extent, convert it to real extents;
549 * return to the caller the extent we create which maps on top of
550 * the originating callers request.
552 * Called without a lock on the inode.
554 * We no longer bother to look at the incoming map - all we have to
555 * guarantee is that whatever we allocate fills the required range.
558 xfs_iomap_write_allocate(
562 xfs_bmbt_irec_t
*imap
)
564 xfs_mount_t
*mp
= ip
->i_mount
;
565 xfs_fileoff_t offset_fsb
, last_block
;
566 xfs_fileoff_t end_fsb
, map_start_fsb
;
567 xfs_fsblock_t first_block
;
568 xfs_bmap_free_t free_list
;
569 xfs_filblks_t count_fsb
;
571 int nimaps
, committed
;
576 * Make sure that the dquots are there.
578 error
= xfs_qm_dqattach(ip
, 0);
580 return XFS_ERROR(error
);
582 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
583 count_fsb
= imap
->br_blockcount
;
584 map_start_fsb
= imap
->br_startoff
;
586 XFS_STATS_ADD(xs_xstrat_bytes
, XFS_FSB_TO_B(mp
, count_fsb
));
588 while (count_fsb
!= 0) {
590 * Set up a transaction with which to allocate the
591 * backing store for the file. Do allocations in a
592 * loop until we get some space in the range we are
593 * interested in. The other space that might be allocated
594 * is in the delayed allocation extent on which we sit
595 * but before our buffer starts.
599 while (nimaps
== 0) {
600 tp
= xfs_trans_alloc(mp
, XFS_TRANS_STRAT_WRITE
);
601 tp
->t_flags
|= XFS_TRANS_RESERVE
;
602 nres
= XFS_EXTENTADD_SPACE_RES(mp
, XFS_DATA_FORK
);
603 error
= xfs_trans_reserve(tp
, nres
,
604 XFS_WRITE_LOG_RES(mp
),
605 0, XFS_TRANS_PERM_LOG_RES
,
606 XFS_WRITE_LOG_COUNT
);
608 xfs_trans_cancel(tp
, 0);
609 return XFS_ERROR(error
);
611 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
612 xfs_trans_ijoin(tp
, ip
, 0);
614 xfs_bmap_init(&free_list
, &first_block
);
617 * it is possible that the extents have changed since
618 * we did the read call as we dropped the ilock for a
619 * while. We have to be careful about truncates or hole
620 * punchs here - we are not allowed to allocate
621 * non-delalloc blocks here.
623 * The only protection against truncation is the pages
624 * for the range we are being asked to convert are
625 * locked and hence a truncate will block on them
628 * As a result, if we go beyond the range we really
629 * need and hit an delalloc extent boundary followed by
630 * a hole while we have excess blocks in the map, we
631 * will fill the hole incorrectly and overrun the
632 * transaction reservation.
634 * Using a single map prevents this as we are forced to
635 * check each map we look for overlap with the desired
636 * range and abort as soon as we find it. Also, given
637 * that we only return a single map, having one beyond
638 * what we can return is probably a bit silly.
640 * We also need to check that we don't go beyond EOF;
641 * this is a truncate optimisation as a truncate sets
642 * the new file size before block on the pages we
643 * currently have locked under writeback. Because they
644 * are about to be tossed, we don't need to write them
648 end_fsb
= XFS_B_TO_FSB(mp
, XFS_ISIZE(ip
));
649 error
= xfs_bmap_last_offset(NULL
, ip
, &last_block
,
654 last_block
= XFS_FILEOFF_MAX(last_block
, end_fsb
);
655 if ((map_start_fsb
+ count_fsb
) > last_block
) {
656 count_fsb
= last_block
- map_start_fsb
;
657 if (count_fsb
== 0) {
664 * From this point onwards we overwrite the imap
665 * pointer that the caller gave to us.
667 error
= xfs_bmapi_write(tp
, ip
, map_start_fsb
,
669 XFS_BMAPI_STACK_SWITCH
,
671 imap
, &nimaps
, &free_list
);
675 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
679 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
683 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
687 * See if we were able to allocate an extent that
688 * covers at least part of the callers request
690 if (!(imap
->br_startblock
|| XFS_IS_REALTIME_INODE(ip
)))
691 return xfs_alert_fsblock_zero(ip
, imap
);
693 if ((offset_fsb
>= imap
->br_startoff
) &&
694 (offset_fsb
< (imap
->br_startoff
+
695 imap
->br_blockcount
))) {
696 XFS_STATS_INC(xs_xstrat_quick
);
701 * So far we have not mapped the requested part of the
702 * file, just surrounding data, try again.
704 count_fsb
-= imap
->br_blockcount
;
705 map_start_fsb
= imap
->br_startoff
+ imap
->br_blockcount
;
709 xfs_bmap_cancel(&free_list
);
710 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
712 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
713 return XFS_ERROR(error
);
717 xfs_iomap_write_unwritten(
722 xfs_mount_t
*mp
= ip
->i_mount
;
723 xfs_fileoff_t offset_fsb
;
724 xfs_filblks_t count_fsb
;
725 xfs_filblks_t numblks_fsb
;
726 xfs_fsblock_t firstfsb
;
729 xfs_bmbt_irec_t imap
;
730 xfs_bmap_free_t free_list
;
736 trace_xfs_unwritten_convert(ip
, offset
, count
);
738 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
739 count_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)offset
+ count
);
740 count_fsb
= (xfs_filblks_t
)(count_fsb
- offset_fsb
);
743 * Reserve enough blocks in this transaction for two complete extent
744 * btree splits. We may be converting the middle part of an unwritten
745 * extent and in this case we will insert two new extents in the btree
746 * each of which could cause a full split.
748 * This reservation amount will be used in the first call to
749 * xfs_bmbt_split() to select an AG with enough space to satisfy the
750 * rest of the operation.
752 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0) << 1;
756 * set up a transaction to convert the range of extents
757 * from unwritten to real. Do allocations in a loop until
758 * we have covered the range passed in.
760 * Note that we open code the transaction allocation here
761 * to pass KM_NOFS--we can't risk to recursing back into
762 * the filesystem here as we might be asked to write out
763 * the same inode that we complete here and might deadlock
766 sb_start_intwrite(mp
->m_super
);
767 tp
= _xfs_trans_alloc(mp
, XFS_TRANS_STRAT_WRITE
, KM_NOFS
);
768 tp
->t_flags
|= XFS_TRANS_RESERVE
| XFS_TRANS_FREEZE_PROT
;
769 error
= xfs_trans_reserve(tp
, resblks
,
770 XFS_WRITE_LOG_RES(mp
), 0,
771 XFS_TRANS_PERM_LOG_RES
,
772 XFS_WRITE_LOG_COUNT
);
774 xfs_trans_cancel(tp
, 0);
775 return XFS_ERROR(error
);
778 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
779 xfs_trans_ijoin(tp
, ip
, 0);
782 * Modify the unwritten extent state of the buffer.
784 xfs_bmap_init(&free_list
, &firstfsb
);
786 error
= xfs_bmapi_write(tp
, ip
, offset_fsb
, count_fsb
,
787 XFS_BMAPI_CONVERT
, &firstfsb
,
788 1, &imap
, &nimaps
, &free_list
);
790 goto error_on_bmapi_transaction
;
793 * Log the updated inode size as we go. We have to be careful
794 * to only log it up to the actual write offset if it is
795 * halfway into a block.
797 i_size
= XFS_FSB_TO_B(mp
, offset_fsb
+ count_fsb
);
798 if (i_size
> offset
+ count
)
799 i_size
= offset
+ count
;
801 i_size
= xfs_new_eof(ip
, i_size
);
803 ip
->i_d
.di_size
= i_size
;
804 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
807 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
809 goto error_on_bmapi_transaction
;
811 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
812 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
814 return XFS_ERROR(error
);
816 if (!(imap
.br_startblock
|| XFS_IS_REALTIME_INODE(ip
)))
817 return xfs_alert_fsblock_zero(ip
, &imap
);
819 if ((numblks_fsb
= imap
.br_blockcount
) == 0) {
821 * The numblks_fsb value should always get
822 * smaller, otherwise the loop is stuck.
824 ASSERT(imap
.br_blockcount
);
827 offset_fsb
+= numblks_fsb
;
828 count_fsb
-= numblks_fsb
;
829 } while (count_fsb
> 0);
833 error_on_bmapi_transaction
:
834 xfs_bmap_cancel(&free_list
);
835 xfs_trans_cancel(tp
, (XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
));
836 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
837 return XFS_ERROR(error
);