Re: [Qemu-devel] [PATCH v4 1/1] tests/qemu-iotests: adding savevm/loadvm with postcopy flag test

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Daniel Henrique Barboza (danielhb@linux.vnet.ibm.com) wrote:
> This patch implements a test case for the scenario that was failing
> prior to the patch "migration/ram.c: do not set 'postcopy_running' in
> POSTCOPY_INCOMING_END", commit acab30b85d.
> 
> This new test file 201 was derived from the test file 181 authored
> by Kevin Wolf.

The test is interesting because it enables postcopy but never triggers
postcopy entry (using migrate_start_postcopy).  Still it's a good path
to check.

It will fail to enable postcopy on older linux hosts or non-linux hosts
that don't have userfault though; I'm not sure how your test fails
with that.

Dave

> CC: Kevin Wolf <kwolf@redhat.com>
> CC: Max Reitz <mreitz@redhat.com>
> CC: Cleber Rosa <crosa@redhat.com>
> Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
> ---
>  tests/qemu-iotests/201     | 116 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/201.out |  23 +++++++++
>  tests/qemu-iotests/group   |   1 +
>  3 files changed, 140 insertions(+)
>  create mode 100755 tests/qemu-iotests/201
>  create mode 100644 tests/qemu-iotests/201.out
> 
> diff --git a/tests/qemu-iotests/201 b/tests/qemu-iotests/201
> new file mode 100755
> index 0000000000..9b6e23bbfc
> --- /dev/null
> +++ b/tests/qemu-iotests/201
> @@ -0,0 +1,116 @@
> +#!/bin/bash
> +#
> +# Test savevm and loadvm after live migration with postcopy flag
> +#
> +# Copyright (C) 2017, IBM Corporation.
> +#
> +# This file is derived from tests/qemu-iotests/181 by Kevin Wolf
> +#
> +# 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
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program.  If not, see <http://www.gnu.org/licenses/>.
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +status=1	# failure is the default!
> +
> +MIG_SOCKET="${TEST_DIR}/migrate"
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +. ./common.qemu
> +
> +_cleanup()
> +{
> +    rm -f "${MIG_SOCKET}"
> +    _cleanup_test_img
> +    _cleanup_qemu
> +}
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_supported_fmt qcow2
> +_supported_proto generic
> +_supported_os Linux
> +
> +size=64M
> +_make_test_img $size
> +
> +echo
> +echo === Starting VMs ===
> +echo
> +
> +qemu_comm_method="monitor"
> +
> +if [ "$IMGOPTSSYNTAX" = "true" ]; then
> +    _launch_qemu \
> +        -drive "${TEST_IMG}",cache=${CACHEMODE},id=disk
> +else
> +    _launch_qemu \
> +        -drive file="${TEST_IMG}",cache=${CACHEMODE},driver=$IMGFMT,id=disk
> +fi
> +src=$QEMU_HANDLE
> +
> +if [ "$IMGOPTSSYNTAX" = "true" ]; then
> +    _launch_qemu \
> +        -drive "${TEST_IMG}",cache=${CACHEMODE},id=disk \
> +        -incoming "unix:${MIG_SOCKET}"
> +else
> +    _launch_qemu \
> +        -drive file="${TEST_IMG}",cache=${CACHEMODE},driver=$IMGFMT,id=disk \
> +        -incoming "unix:${MIG_SOCKET}"
> +fi
> +dest=$QEMU_HANDLE
> +
> +echo
> +echo === Set \'migrate_set_capability postcopy-ram on\' and migrate ===
> +echo
> +
> +silent=yes
> +_send_qemu_cmd $dest 'migrate_set_capability postcopy-ram on' "(qemu)"
> +_send_qemu_cmd $src 'migrate_set_capability postcopy-ram on' "(qemu)"
> +_send_qemu_cmd $src "migrate -d unix:${MIG_SOCKET}" "(qemu)"
> +
> +QEMU_COMM_TIMEOUT=1 qemu_cmd_repeat=10 silent=yes \
> +    _send_qemu_cmd $src "info migrate" "completed\|failed"
> +silent=yes _send_qemu_cmd $src "" "(qemu)"
> +
> +echo
> +echo === Check if migration was successful ===
> +echo
> +
> +QEMU_COMM_TIMEOUT=1 silent=yes \
> +    _send_qemu_cmd $src "info migrate" "completed"
> +silent=yes _send_qemu_cmd $src "" "(qemu)"
> +
> +echo
> +echo === On destination, execute savevm and loadvm ===
> +echo
> +
> +silent=
> +_send_qemu_cmd $dest 'savevm state1' "(qemu)"
> +_send_qemu_cmd $dest 'loadvm state1' "(qemu)"
> +
> +echo
> +echo === Shut down and check image ===
> +echo
> +
> +_send_qemu_cmd $src 'quit' ""
> +_send_qemu_cmd $dest 'quit' ""
> +wait=1 _cleanup_qemu
> +
> +_check_test_img
> +
> +# success, all done
> +echo "*** done"
> +status=0
> diff --git a/tests/qemu-iotests/201.out b/tests/qemu-iotests/201.out
> new file mode 100644
> index 0000000000..9faf06f996
> --- /dev/null
> +++ b/tests/qemu-iotests/201.out
> @@ -0,0 +1,23 @@
> +QA output created by 201
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
> +
> +=== Starting VMs ===
> +
> +
> +=== Set 'migrate_set_capability postcopy-ram on' and migrate ===
> +
> +
> +=== Check if migration was successful ===
> +
> +
> +=== On destination, execute savevm and loadvm ===
> +
> +(qemu) savevm state1
> +(qemu) loadvm state1
> +
> +=== Shut down and check image ===
> +
> +(qemu) quit
> +(qemu) quit
> +No errors were found on the image.
> +*** done
> diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
> index 3e688678dd..c16bc2c5e2 100644
> --- a/tests/qemu-iotests/group
> +++ b/tests/qemu-iotests/group
> @@ -197,3 +197,4 @@
>  197 rw auto quick
>  198 rw auto
>  200 rw auto
> +201 rw auto migration
> -- 
> 2.13.6
> 
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK