Commit 23a8519b authored Nov 17, 2010 by Josef Bacik Committed by Al Viro Jan 12, 2011

Btrfs: fail if we try to use hole punch



Btrfs 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,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent d6dc8462

fs/btrfs/inode.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -7115,6 +7115,10 @@ static long btrfs_fallocate(struct inode *inode, int mode,
		alloc_start = offset & ~mask;
		alloc_end = (offset + len + mask) & ~mask;

		/* We only support the FALLOC_FL_KEEP_SIZE mode */
		if (mode && (mode != FALLOC_FL_KEEP_SIZE))
		return -EOPNOTSUPP;

		/*
		* wait for ordered IO before we have any locks. We'll loop again
		* below with the locks held.