[PATCH] xfs: return FIEMAP_EXTENT_UNKNOWN for delayed allocation extent

[Jeff Liu <jeff.liu@xxxxxxxxxx>]

From: Jie Liu <jeff.liu@xxxxxxxxxx>

For FIEMAP ioctl(2), if an extent is in delayed allocation
state, we need to return the FIEMAP_EXTENT_UNKNOWN flag except
the FIEMAP_EXTENT_DELALLOC because its data location is unknown.

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
 fs/xfs/xfs_iops.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index d82efaa..53ddbdb 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -970,7 +970,8 @@ xfs_fiemap_format(
        if (bmv->bmv_oflags & BMV_OF_PREALLOC)
                fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
        else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
-               fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
+               fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
+                                FIEMAP_EXTENT_UNKNOWN);
                physical = 0;   /* no block yet */
        }
        if (bmv->bmv_oflags & BMV_OF_LAST)
-- 
1.7.9.5