[PATCH 4/7] xfs: Implement fallocate query support mode

[Lukas Czerner <lczerner@redhat.com>]

Return all fallcoate modes supported by xfs file system.

Cc: linux-xfs@vger.kernel.org
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
---
 fs/xfs/xfs_file.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ebdd0bd..85e06c6 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -746,7 +746,8 @@ xfs_file_write_iter(
 #define	XFS_FALLOC_FL_SUPPORTED						\
 		(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |		\
 		 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |	\
-		 FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE)
+		 FALLOC_FL_INSERT_RANGE | FALLOC_FL_UNSHARE_RANGE |	\
+		 FALLOC_FL_QUERY_SUPPORT | FALLOC_FL_PREALLOC_RANGE)
 
 STATIC long
 xfs_file_fallocate(
@@ -768,6 +769,9 @@ xfs_file_fallocate(
 	if (mode & ~XFS_FALLOC_FL_SUPPORTED)
 		return -EOPNOTSUPP;
 
+	if (mode & FALLOC_FL_QUERY_SUPPORT)
+		return XFS_FALLOC_FL_SUPPORTED;
+
 	xfs_ilock(ip, iolock);
 	error = xfs_break_layouts(inode, &iolock);
 	if (error)
-- 
2.7.5