Re: [PATCH] xfstests: btrfs/012: add a regression test for deleting ext2_saved

[Eryu Guan <eguan@redhat.com>]

On Tue, Oct 20, 2015 at 07:34:06PM +0800, Liu Bo wrote:
> Btrfs now has changed to delete subvolume/snapshot asynchronously,
> which means that after umount, if we've already deleted 'ext2_saved',
> rollback can still be completed, which should not.
> 
> So this adds a regression test for this.
> 
> Signed-off-by: Liu Bo <bo.li.liu@oracle.com>

I'm not sure if this belongs to a new test, but given that this test
has very similar steps to existing tests, so I think that's fine.

Reviewed-by: Eryu Guan <eguan@redhat.com>

> ---
>  tests/btrfs/012 | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/tests/btrfs/012 b/tests/btrfs/012
> index d513759..b39dec0 100755
> --- a/tests/btrfs/012
> +++ b/tests/btrfs/012
> @@ -112,6 +112,18 @@ diff -r /lib/modules/`uname -r`/ $SCRATCH_MNT/`uname -r`/ 2>&1 | grep -vw "sourc
>  
>  _scratch_unmount
>  
> +# Convert it to btrfs, mount it and delete "ext2_saved"
> +$BTRFS_CONVERT_PROG $SCRATCH_DEV >> $seqres.full 2>&1 || \
> +	_fail "btrfs-convert failed"
> +_scratch_mount || _fail "Could not mount new btrfs fs"
> +$BTRFS_UTIL_PROG subvolume delete $SCRATCH_MNT/ext2_saved >> $seqres.full 2>&1 ||
> +	_fail "failed to delete ext2_saved subvolume"
> +_scratch_unmount
> +
> +# Now restore the ext4 device, expecting a failure
> +$BTRFS_CONVERT_PROG -r $SCRATCH_DEV >> $seqres.full 2>&1
> +[ $? -eq 1 ] || _fail "Failure is expected, but btrfs-convert returns with rollback complete"
> +
>  # success, all done
>  status=0
>  exit
> -- 
> 1.8.2.1
> 
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