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

Lukas Czerner
2017-09-18T15:53:04Z

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