[PATCH RESEND] xfstests: btrfs: cross-subvolume sparse copy

[David Sterba]

On Tue, Jan 21, 2014 at 12:40:48PM +0100, Koen De Wit wrote:
> +btrfs subvol delete $SUBVOL1 >/dev/null 2>&1
> +btrfs subvol delete $SUBVOL2 >/dev/null 2>&1

Please use $BTRFS_UTIL_PROG instead of 'btrfs' and don't shorten the
command names, ie 'subvolume'.

> +cp --reflink $TESTDIR1/file1 $SUBVOL1
> +cp --reflink $TESTDIR1/file1 $SUBVOL2
> +cp --reflink $SUBVOL1/file2 $TESTDIR1/
> +cp --reflink $SUBVOL1/file2 $SUBVOL2
> +cp --reflink $SUBVOL2/file3 $TESTDIR1/
> +cp --reflink $SUBVOL2/file3 $SUBVOL1

--reflink without any parameter means 'always', that's what we want, but
can we possibly make it explicit? 'cp' is an external tool and if the
default changes, the test would not work as expected.

Otherwise ok,
Reviewed-by: David Sterba <dsterba at suse.cz>