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authorJosef Bacik2010-11-17 20:46:18 -0500
committerAl Viro2011-01-12 20:16:44 -0500
commitd6dc8462f471f7bbb49c42c147bf84de0c977099 (patch)
tree64624b26b2c2f551e2b579013d149c51c0716583 /fs/ext4
parentdb47fef2cd9aab76ab976e8b45a06a1b3ad0e3e4 (diff)
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>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/extents.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e910720e8bb8..2e061dffb722 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3644,6 +3644,10 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
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_