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authorChristoph Hellwig <hch@lst.de>2019-10-17 23:12:04 +0300
committerDarrick J. Wong <darrick.wong@oracle.com>2019-10-21 18:51:59 +0300
commit05b30949f1aa8d797eb5c1cf7a24b9c4f8e82320 (patch)
treefb6976b8f97659e26f26de6a85dc46e3bf930c72 /fs/xfs/xfs_iomap.c
parent2492a606b3d24ed901203bd4db19f46d112811c7 (diff)
downloadlinux-05b30949f1aa8d797eb5c1cf7a24b9c4f8e82320.tar.xz
xfs: set IOMAP_F_NEW more carefully
Don't set IOMAP_F_NEW if we COW over an existing allocated range, as these aren't strictly new allocations. This is required to be able to use IOMAP_F_NEW to zero newly allocated blocks, which is required for the iomap code to fully support file systems that don't do delayed allocations or use unwritten extents. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@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/xfs_iomap.c')
-rw-r--r--fs/xfs/xfs_iomap.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 699bbb81b8a8..f7b8b1329ddd 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -707,9 +707,12 @@ retry:
* Flag newly allocated delalloc blocks with IOMAP_F_NEW so we punch
* them out if the write happens to fail.
*/
- iomap_flags |= IOMAP_F_NEW;
- trace_xfs_iomap_alloc(ip, offset, count, whichfork,
- whichfork == XFS_DATA_FORK ? &imap : &cmap);
+ if (whichfork == XFS_DATA_FORK) {
+ iomap_flags |= IOMAP_F_NEW;
+ trace_xfs_iomap_alloc(ip, offset, count, whichfork, &imap);
+ } else {
+ trace_xfs_iomap_alloc(ip, offset, count, whichfork, &cmap);
+ }
done:
if (whichfork == XFS_COW_FORK) {
if (imap.br_startoff > offset_fsb) {