Re: [Qemu-devel] [Qemu-block] [PATCH v7 5/5] block: add tests for the 'blockdev-snapshot' command

[Jeff Cody <jcody@redhat.com>]

On Mon, Oct 12, 2015 at 12:16:17PM +0300, Alberto Garcia wrote:
> Signed-off-by: Alberto Garcia <berto@igalia.com>
> Reviewed-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/085     | 102 ++++++++++++++++++++++++++++++++++++++++++---
>  tests/qemu-iotests/085.out |  34 ++++++++++++++-
>  2 files changed, 128 insertions(+), 8 deletions(-)
> 
> diff --git a/tests/qemu-iotests/085 b/tests/qemu-iotests/085
> index 56cd6f8..9484117 100755
> --- a/tests/qemu-iotests/085
> +++ b/tests/qemu-iotests/085
> @@ -7,6 +7,7 @@
>  # snapshots are performed.
>  #
>  # Copyright (C) 2014 Red Hat, Inc.
> +# Copyright (C) 2015 Igalia, S.L.
>  #
>  # This program is free software; you can redistribute it and/or modify
>  # it under the terms of the GNU General Public License as published by
> @@ -34,17 +35,17 @@ status=1	# failure is the default!
>  snapshot_virt0="snapshot-v0.qcow2"
>  snapshot_virt1="snapshot-v1.qcow2"
>  
> -MAX_SNAPSHOTS=10
> +SNAPSHOTS=10
>  
>  _cleanup()
>  {
>      _cleanup_qemu
> -    for i in $(seq 1 ${MAX_SNAPSHOTS})
> +    for i in $(seq 1 ${SNAPSHOTS})
>      do
>          rm -f "${TEST_DIR}/${i}-${snapshot_virt0}"
>          rm -f "${TEST_DIR}/${i}-${snapshot_virt1}"
>      done
> -	_cleanup_test_img
> +    rm -f "${TEST_IMG}.1" "${TEST_IMG}.2"
>  
>  }
>  trap "_cleanup; exit \$status" 0 1 2 3 15
> @@ -85,18 +86,50 @@ function create_group_snapshot()
>      _send_qemu_cmd $h "${cmd}" "return"
>  }
>  
> +# ${1}: unique identifier for the snapshot filename
> +# ${2}: true: open backing images; false: don't open them (default)
> +function add_snapshot_image()
> +{
> +    if [ "${2}" = "true" ]; then
> +        extra_params=""
> +    else
> +        extra_params="'backing': '', "
> +    fi
> +    base_image="${TEST_DIR}/$((${1}-1))-${snapshot_virt0}"
> +    snapshot_file="${TEST_DIR}/${1}-${snapshot_virt0}"
> +    _make_test_img -b "${base_image}" "$size"
> +    mv "${TEST_IMG}" "${snapshot_file}"
> +    cmd="{ 'execute': 'blockdev-add', 'arguments':
> +           { 'options':
> +             { 'driver': 'qcow2', 'node-name': 'snap_"${1}"', "${extra_params}"
> +               'file':
> +               { 'driver': 'file', 'filename': '"${snapshot_file}"' } } } }"
> +    _send_qemu_cmd $h "${cmd}" "return"
> +}
> +
> +# ${1}: unique identifier for the snapshot filename
> +# ${2}: expected response, defaults to 'return'
> +function blockdev_snapshot()
> +{
> +    cmd="{ 'execute': 'blockdev-snapshot',
> +                      'arguments': { 'node': 'virtio0',
> +                                     'overlay':'snap_"${1}"' } }"
> +    _send_qemu_cmd $h "${cmd}" "${2:-return}"
> +}
> +
>  size=128M
>  
>  _make_test_img $size
> -mv "${TEST_IMG}" "${TEST_IMG}.orig"
> +mv "${TEST_IMG}" "${TEST_IMG}.1"
>  _make_test_img $size
> +mv "${TEST_IMG}" "${TEST_IMG}.2"
>  
>  echo
>  echo === Running QEMU ===
>  echo
>  
>  qemu_comm_method="qmp"
> -_launch_qemu -drive file="${TEST_IMG}.orig",if=virtio -drive file="${TEST_IMG}",if=virtio
> +_launch_qemu -drive file="${TEST_IMG}.1",if=virtio -drive file="${TEST_IMG}.2",if=virtio
>  h=$QEMU_HANDLE
>  
>  echo
> @@ -105,6 +138,8 @@ echo
>  
>  _send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" "return"
>  
> +# Tests for the blockdev-snapshot-sync command
> +
>  echo
>  echo === Create a single snapshot on virtio0 ===
>  echo
> @@ -132,11 +167,66 @@ echo
>  echo === Create several transactional group snapshots ===
>  echo
>  
> -for i in $(seq 2 ${MAX_SNAPSHOTS})
> +for i in $(seq 2 ${SNAPSHOTS})
>  do
>      create_group_snapshot ${i}
>  done
>  
> +# Tests for the blockdev-snapshot command
> +
> +echo
> +echo === Create a couple of snapshots using blockdev-snapshot ===
> +echo
> +
> +SNAPSHOTS=$((${SNAPSHOTS}+1))
> +add_snapshot_image ${SNAPSHOTS}
> +blockdev_snapshot ${SNAPSHOTS}
> +
> +SNAPSHOTS=$((${SNAPSHOTS}+1))
> +add_snapshot_image ${SNAPSHOTS}
> +blockdev_snapshot ${SNAPSHOTS}
> +
> +echo
> +echo === Invalid command - snapshot node used as active layer ===
> +echo
> +
> +blockdev_snapshot ${SNAPSHOTS} error
> +
> +_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot',
> +                     'arguments': { 'node':'virtio0',
> +                                    'overlay':'virtio0' }
> +                   }" "error"
> +
> +_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot',
> +                     'arguments': { 'node':'virtio0',
> +                                    'overlay':'virtio1' }
> +                   }" "error"
> +
> +echo
> +echo === Invalid command - snapshot node used as backing hd ===
> +echo
> +
> +blockdev_snapshot $((${SNAPSHOTS}-1)) error
> +
> +echo
> +echo === Invalid command - snapshot node has a backing image ===
> +echo
> +
> +SNAPSHOTS=$((${SNAPSHOTS}+1))
> +add_snapshot_image ${SNAPSHOTS} true
> +blockdev_snapshot ${SNAPSHOTS} error
> +
> +echo
> +echo === Invalid command - The node does not exist ===
> +echo
> +
> +blockdev_snapshot $((${SNAPSHOTS}+1)) error
> +
> +_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot',
> +                     'arguments': { 'node':'nodevice',
> +                                    'overlay':'snap_"${SNAPSHOTS}"' }
> +                   }" "error"
> +
>  # success, all done
>  echo "*** done"
>  rm -f $seq.full
> diff --git a/tests/qemu-iotests/085.out b/tests/qemu-iotests/085.out
> index a6cf19e..52292ea 100644
> --- a/tests/qemu-iotests/085.out
> +++ b/tests/qemu-iotests/085.out
> @@ -11,7 +11,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>  
>  === Create a single snapshot on virtio0 ===
>  
> -Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2.orig backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
> +Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2.1 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
>  {"return": {}}
>  
>  === Invalid command - missing device and nodename ===
> @@ -26,7 +26,7 @@ Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file
>  === Create several transactional group snapshots ===
>  
>  Formatting 'TEST_DIR/2-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/1-snapshot-v0.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
> -Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
> +Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/t.qcow2.2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
>  {"return": {}}
>  Formatting 'TEST_DIR/3-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/2-snapshot-v0.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
>  Formatting 'TEST_DIR/3-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/2-snapshot-v1.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
> @@ -52,4 +52,34 @@ Formatting 'TEST_DIR/9-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file
>  Formatting 'TEST_DIR/10-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/9-snapshot-v0.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
>  Formatting 'TEST_DIR/10-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file=TEST_DIR/9-snapshot-v1.qcow2 backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
>  {"return": {}}
> +
> +=== Create a couple of snapshots using blockdev-snapshot ===
> +
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/10-snapshot-v0.IMGFMT
> +{"return": {}}
> +{"return": {}}
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/11-snapshot-v0.IMGFMT
> +{"return": {}}
> +{"return": {}}
> +
> +=== Invalid command - snapshot node used as active layer ===
> +
> +{"error": {"class": "GenericError", "desc": "The snapshot is already in use by virtio0"}}
> +{"error": {"class": "GenericError", "desc": "The snapshot is already in use by virtio0"}}
> +{"error": {"class": "GenericError", "desc": "The snapshot is already in use by virtio1"}}
> +
> +=== Invalid command - snapshot node used as backing hd ===
> +
> +{"error": {"class": "GenericError", "desc": "Node 'snap_11' is busy: node is used as backing hd of 'virtio0'"}}
> +
> +=== Invalid command - snapshot node has a backing image ===
> +
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/12-snapshot-v0.IMGFMT
> +{"return": {}}
> +{"error": {"class": "GenericError", "desc": "The snapshot already has a backing image"}}
> +
> +=== Invalid command - The node does not exist ===
> +
> +{"error": {"class": "GenericError", "desc": "Cannot find device=snap_14 nor node_name=snap_14"}}
> +{"error": {"class": "GenericError", "desc": "Cannot find device=nodevice nor node_name=nodevice"}}
>  *** done
> -- 
> 2.6.1
> 
>

Reviewed-by: Jeff Cody <jcody@redhat.com>