diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-02-15 17:02:50 +0100 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-02-17 20:55:54 +0100 |
| commit | 19c8e4e25866fac5ba7138b902cc45b6d3c8e827 (patch) | |
| tree | 4abac233bf1bd6426ddd66cdf1a4930ae5c37f52 /fs/xfs | |
| parent | xfs: move xfs_iomap_write_allocate to xfs_aops.c (diff) | |
| download | linux-19c8e4e25866fac5ba7138b902cc45b6d3c8e827.tar.xz linux-19c8e4e25866fac5ba7138b902cc45b6d3c8e827.zip | |
xfs: remove the truncate short cut in xfs_map_blocks
Now that we properly handle the race with truncate in the delalloc
allocator there is no need to short cut this exceptional case earlier
on.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_aops.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 42017ecf78ed..a6abb7125203 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -420,26 +420,6 @@ xfs_map_blocks( xfs_iunlock(ip, XFS_ILOCK_SHARED); wpc->fork = XFS_COW_FORK; - - /* - * Truncate can race with writeback since writeback doesn't - * take the iolock and truncate decreases the file size before - * it starts truncating the pages between new_size and old_size. - * Therefore, we can end up in the situation where writeback - * gets a CoW fork mapping but the truncate makes the mapping - * invalid and we end up in here trying to get a new mapping. - * bail out here so that we simply never get a valid mapping - * and so we drop the write altogether. The page truncation - * will kill the contents anyway. - */ - if (offset > i_size_read(inode)) { - wpc->imap.br_blockcount = end_fsb - offset_fsb; - wpc->imap.br_startoff = offset_fsb; - wpc->imap.br_startblock = HOLESTARTBLOCK; - wpc->imap.br_state = XFS_EXT_NORM; - return 0; - } - goto allocate_blocks; } |