From 24e17b5fb99d4d1b47fe0847a3a801e36d431ff6 Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Thu, 5 May 2005 13:33:20 -0700 Subject: [XFS] Use the right offset when ensuring a delayed allocate conversion has covered the offset originally requested. Can cause data corruption when multiple processes are performing writeout on different areas of the same file. Quite difficult to hit though. SGI Modid: xfs-linux:xfs-kern:22377a Signed-off-by: Nathan Scott Signed-off-by: Christoph Hellwig . --- fs/xfs/xfs_iomap.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'fs/xfs/xfs_iomap.c') diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 3826e8f0e28..b291a2b5357 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -308,7 +308,8 @@ phase2: break; } - error = XFS_IOMAP_WRITE_ALLOCATE(mp, io, &imap, &nimaps); + error = XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, + &imap, &nimaps); break; case BMAPI_UNWRITTEN: lockmode = 0; @@ -746,6 +747,8 @@ write_map: int xfs_iomap_write_allocate( xfs_inode_t *ip, + loff_t offset, + size_t count, xfs_bmbt_irec_t *map, int *retmap) { @@ -770,9 +773,9 @@ xfs_iomap_write_allocate( if ((error = XFS_QM_DQATTACH(mp, ip, 0))) return XFS_ERROR(error); - offset_fsb = map->br_startoff; + offset_fsb = XFS_B_TO_FSBT(mp, offset); count_fsb = map->br_blockcount; - map_start_fsb = offset_fsb; + map_start_fsb = map->br_startoff; XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); @@ -868,9 +871,9 @@ xfs_iomap_write_allocate( imap[i].br_startoff, imap[i].br_blockcount,imap[i].br_state); } - if ((map->br_startoff >= imap[i].br_startoff) && - (map->br_startoff < (imap[i].br_startoff + - imap[i].br_blockcount))) { + if ((offset_fsb >= imap[i].br_startoff) && + (offset_fsb < (imap[i].br_startoff + + imap[i].br_blockcount))) { *map = imap[i]; *retmap = 1; XFS_STATS_INC(xs_xstrat_quick); @@ -883,9 +886,8 @@ xfs_iomap_write_allocate( * file, just surrounding data, try again. */ nimaps--; - offset_fsb = imap[nimaps].br_startoff + - imap[nimaps].br_blockcount; - map_start_fsb = offset_fsb; + map_start_fsb = imap[nimaps].br_startoff + + imap[nimaps].br_blockcount; } trans_cancel: -- cgit v1.2.3-18-g5258