Re: [Qemu-devel] [PATCH v2 09/11] iotests: Convert to preallocated encrypted qcow2

[Maxim Levitsky <mlevitsk@redhat.com>]

On Wed, 2019-07-24 at 19:12 +0200, Max Reitz wrote:
> Add a test case for converting an empty image (which only returns zeroes
> when read) to a preallocated encrypted qcow2 image.
> qcow2_has_zero_init() should return 0 then, thus forcing qemu-img
> convert to create zero clusters.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> Acked-by: Stefano Garzarella <sgarzare@redhat.com>
> Tested-by: Stefano Garzarella <sgarzare@redhat.com>
> ---
>  tests/qemu-iotests/188     | 20 +++++++++++++++++++-
>  tests/qemu-iotests/188.out |  4 ++++
>  2 files changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/qemu-iotests/188 b/tests/qemu-iotests/188
> index be7278aa65..afca44df54 100755
> --- a/tests/qemu-iotests/188
> +++ b/tests/qemu-iotests/188
> @@ -48,7 +48,7 @@ SECRETALT="secret,id=sec0,data=platypus"
>  
>  _make_test_img --object $SECRET -o "encrypt.format=luks,encrypt.key-secret=sec0,encrypt.iter-time=10" $size
>  
> -IMGSPEC="driver=$IMGFMT,file.filename=$TEST_IMG,encrypt.key-secret=sec0"
> +IMGSPEC="driver=$IMGFMT,encrypt.key-secret=sec0,file.filename=$TEST_IMG"
This change I think doesn't change anything

>  
>  QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT
>  
> @@ -68,6 +68,24 @@ echo
>  echo "== verify open failure with wrong password =="
>  $QEMU_IO --object $SECRETALT -c "read -P 0xa 0 $size" --image-opts $IMGSPEC | _filter_qemu_io | _filter_testdir
>  
> +_cleanup_test_img
> +
> +echo
> +echo "== verify that has_zero_init returns false when preallocating =="
> +
> +# Empty source file
> +if [ -n "$TEST_IMG_FILE" ]; then
> +    TEST_IMG_FILE="${TEST_IMG_FILE}.orig" _make_test_img $size
> +else
> +    TEST_IMG="${TEST_IMG}.orig" _make_test_img $size
> +fi

I wonder why do we have TEST_IMG_FILE and TEST_IMG, I don't know iotests well enough
From the quick look at the code, the TEST_IMG_FILE is an actual file, while TEST_IMG can
be various URL like address.

> +
> +$QEMU_IMG convert -O "$IMGFMT" --object $SECRET \
> +    -o "encrypt.format=luks,encrypt.key-secret=sec0,encrypt.iter-time=10,preallocation=metadata" \
> +    "${TEST_IMG}.orig" "$TEST_IMG"
> +
> +$QEMU_IMG compare --object $SECRET --image-opts "${IMGSPEC}.orig" "$IMGSPEC"
> +
>  
>  # success, all done
>  echo "*** done"
> diff --git a/tests/qemu-iotests/188.out b/tests/qemu-iotests/188.out
> index 97b1402671..c568ef3701 100644
> --- a/tests/qemu-iotests/188.out
> +++ b/tests/qemu-iotests/188.out
> @@ -15,4 +15,8 @@ read 16777216/16777216 bytes at offset 0
>  
>  == verify open failure with wrong password ==
>  qemu-io: can't open: Invalid password, cannot unlock any keyslot
> +
> +== verify that has_zero_init returns false when preallocating ==
> +Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=16777216
> +Images are identical.
>  *** done

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
	Maxim Levitsky