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-rw-r--r--fs/xfs/xfs_iomap.c52
1 files changed, 28 insertions, 24 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 39ad46b3ed46..a0dbcaff911a 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -242,7 +242,7 @@ xfs_iomap_write_direct(
242 xfs_off_t offset, 242 xfs_off_t offset,
243 size_t count, 243 size_t count,
244 int flags, 244 int flags,
245 xfs_bmbt_irec_t *ret_imap, 245 xfs_bmbt_irec_t *imap,
246 int *nmaps) 246 int *nmaps)
247{ 247{
248 xfs_mount_t *mp = ip->i_mount; 248 xfs_mount_t *mp = ip->i_mount;
@@ -256,7 +256,6 @@ xfs_iomap_write_direct(
256 int quota_flag; 256 int quota_flag;
257 int rt; 257 int rt;
258 xfs_trans_t *tp; 258 xfs_trans_t *tp;
259 xfs_bmbt_irec_t imap;
260 xfs_bmap_free_t free_list; 259 xfs_bmap_free_t free_list;
261 uint qblocks, resblks, resrtextents; 260 uint qblocks, resblks, resrtextents;
262 int committed; 261 int committed;
@@ -280,10 +279,10 @@ xfs_iomap_write_direct(
280 if (error) 279 if (error)
281 goto error_out; 280 goto error_out;
282 } else { 281 } else {
283 if (*nmaps && (ret_imap->br_startblock == HOLESTARTBLOCK)) 282 if (*nmaps && (imap->br_startblock == HOLESTARTBLOCK))
284 last_fsb = MIN(last_fsb, (xfs_fileoff_t) 283 last_fsb = MIN(last_fsb, (xfs_fileoff_t)
285 ret_imap->br_blockcount + 284 imap->br_blockcount +
286 ret_imap->br_startoff); 285 imap->br_startoff);
287 } 286 }
288 count_fsb = last_fsb - offset_fsb; 287 count_fsb = last_fsb - offset_fsb;
289 ASSERT(count_fsb > 0); 288 ASSERT(count_fsb > 0);
@@ -336,12 +335,15 @@ xfs_iomap_write_direct(
336 bmapi_flag |= XFS_BMAPI_PREALLOC; 335 bmapi_flag |= XFS_BMAPI_PREALLOC;
337 336
338 /* 337 /*
339 * Issue the xfs_bmapi() call to allocate the blocks 338 * Issue the xfs_bmapi() call to allocate the blocks.
339 *
340 * From this point onwards we overwrite the imap pointer that the
341 * caller gave to us.
340 */ 342 */
341 xfs_bmap_init(&free_list, &firstfsb); 343 xfs_bmap_init(&free_list, &firstfsb);
342 nimaps = 1; 344 nimaps = 1;
343 error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, bmapi_flag, 345 error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, bmapi_flag,
344 &firstfsb, 0, &imap, &nimaps, &free_list); 346 &firstfsb, 0, imap, &nimaps, &free_list);
345 if (error) 347 if (error)
346 goto error0; 348 goto error0;
347 349
@@ -363,12 +365,11 @@ xfs_iomap_write_direct(
363 goto error_out; 365 goto error_out;
364 } 366 }
365 367
366 if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) { 368 if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip))) {
367 error = xfs_cmn_err_fsblock_zero(ip, &imap); 369 error = xfs_cmn_err_fsblock_zero(ip, imap);
368 goto error_out; 370 goto error_out;
369 } 371 }
370 372
371 *ret_imap = imap;
372 *nmaps = 1; 373 *nmaps = 1;
373 return 0; 374 return 0;
374 375
@@ -542,7 +543,7 @@ xfs_iomap_write_allocate(
542 xfs_inode_t *ip, 543 xfs_inode_t *ip,
543 xfs_off_t offset, 544 xfs_off_t offset,
544 size_t count, 545 size_t count,
545 xfs_bmbt_irec_t *map, 546 xfs_bmbt_irec_t *imap,
546 int *retmap) 547 int *retmap)
547{ 548{
548 xfs_mount_t *mp = ip->i_mount; 549 xfs_mount_t *mp = ip->i_mount;
@@ -551,7 +552,6 @@ xfs_iomap_write_allocate(
551 xfs_fsblock_t first_block; 552 xfs_fsblock_t first_block;
552 xfs_bmap_free_t free_list; 553 xfs_bmap_free_t free_list;
553 xfs_filblks_t count_fsb; 554 xfs_filblks_t count_fsb;
554 xfs_bmbt_irec_t imap;
555 xfs_trans_t *tp; 555 xfs_trans_t *tp;
556 int nimaps, committed; 556 int nimaps, committed;
557 int error = 0; 557 int error = 0;
@@ -567,8 +567,8 @@ xfs_iomap_write_allocate(
567 return XFS_ERROR(error); 567 return XFS_ERROR(error);
568 568
569 offset_fsb = XFS_B_TO_FSBT(mp, offset); 569 offset_fsb = XFS_B_TO_FSBT(mp, offset);
570 count_fsb = map->br_blockcount; 570 count_fsb = imap->br_blockcount;
571 map_start_fsb = map->br_startoff; 571 map_start_fsb = imap->br_startoff;
572 572
573 XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); 573 XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb));
574 574
@@ -647,10 +647,15 @@ xfs_iomap_write_allocate(
647 } 647 }
648 } 648 }
649 649
650 /* Go get the actual blocks */ 650 /*
651 * Go get the actual blocks.
652 *
653 * From this point onwards we overwrite the imap
654 * pointer that the caller gave to us.
655 */
651 error = xfs_bmapi(tp, ip, map_start_fsb, count_fsb, 656 error = xfs_bmapi(tp, ip, map_start_fsb, count_fsb,
652 XFS_BMAPI_WRITE, &first_block, 1, 657 XFS_BMAPI_WRITE, &first_block, 1,
653 &imap, &nimaps, &free_list); 658 imap, &nimaps, &free_list);
654 if (error) 659 if (error)
655 goto trans_cancel; 660 goto trans_cancel;
656 661
@@ -669,13 +674,12 @@ xfs_iomap_write_allocate(
669 * See if we were able to allocate an extent that 674 * See if we were able to allocate an extent that
670 * covers at least part of the callers request 675 * covers at least part of the callers request
671 */ 676 */
672 if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) 677 if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip)))
673 return xfs_cmn_err_fsblock_zero(ip, &imap); 678 return xfs_cmn_err_fsblock_zero(ip, imap);
674 679
675 if ((offset_fsb >= imap.br_startoff) && 680 if ((offset_fsb >= imap->br_startoff) &&
676 (offset_fsb < (imap.br_startoff + 681 (offset_fsb < (imap->br_startoff +
677 imap.br_blockcount))) { 682 imap->br_blockcount))) {
678 *map = imap;
679 *retmap = 1; 683 *retmap = 1;
680 XFS_STATS_INC(xs_xstrat_quick); 684 XFS_STATS_INC(xs_xstrat_quick);
681 return 0; 685 return 0;
@@ -685,8 +689,8 @@ xfs_iomap_write_allocate(
685 * So far we have not mapped the requested part of the 689 * So far we have not mapped the requested part of the
686 * file, just surrounding data, try again. 690 * file, just surrounding data, try again.
687 */ 691 */
688 count_fsb -= imap.br_blockcount; 692 count_fsb -= imap->br_blockcount;
689 map_start_fsb = imap.br_startoff + imap.br_blockcount; 693 map_start_fsb = imap->br_startoff + imap->br_blockcount;
690 } 694 }
691 695
692trans_cancel: 696trans_cancel: