Ext4: fail if we try to use hole punch
Ext4 doesn't have the ability to punch holes yet, so make sure we return
EOPNOTSUPP if we try to use hole punching through fallocate. This support can
be added later. Thanks,
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e910720..2e061df 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3644,6 +3644,10 @@
struct ext4_map_blocks map;
unsigned int credits, blkbits = inode->i_blkbits;
+ /* We only support the FALLOC_FL_KEEP_SIZE mode */
+ if (mode && (mode != FALLOC_FL_KEEP_SIZE))
+ return -EOPNOTSUPP;
+
/*
* currently supporting (pre)allocate mode for extent-based
* files _only_