Re: [Qemu-devel] [PATCHv2 5/6] block: add qemu-iotest for write-merge parameter

[Max Reitz <mreitz@redhat.com>]

On 2014-10-22 at 15:21, Peter Lieven wrote:
> Signed-off-by: Peter Lieven <pl@kamp.de>
> ---
>   tests/qemu-iotests/108     |  108 ++++++++++++++++++++++++++++++++++++++++++++

It's a pity, but 108 is already taken (by me and on Kevin's block branch 
at least). 108 having 108 lines would have been nice, though.

>   tests/qemu-iotests/108.out |   63 ++++++++++++++++++++++++++
>   tests/qemu-iotests/group   |    1 +
>   3 files changed, 172 insertions(+)
>   create mode 100755 tests/qemu-iotests/108
>   create mode 100644 tests/qemu-iotests/108.out
>
> diff --git a/tests/qemu-iotests/108 b/tests/qemu-iotests/108
> new file mode 100755
> index 0000000..34da1fb
> --- /dev/null
> +++ b/tests/qemu-iotests/108
> @@ -0,0 +1,108 @@
> +#!/bin/bash
> +#
> +# Test if write-merging parameter is applied correctly
> +#
> +# Copyright (C) 2014 Peter Lieven <pl@kamp.de>
> +#
> +# 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/>.
> +#
> +
> +# creator
> +owner=pl@kamp.de
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1	# failure is the default!
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +
> +_supported_fmt raw
> +_supported_proto file
> +_supported_os Linux
> +
> +function do_run_qemu()
> +{
> +    echo Testing: "$@"
> +    $QEMU -nographic -qmp stdio -serial none "$@"
> +    echo
> +}
> +
> +function run_qemu()
> +{
> +    do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qmp
> +}
> +
> +size=128M
> +
> +_make_test_img $size
> +
> +echo
> +echo === write-merging not specified ===
> +echo
> +
> +run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk,node-name=root,file.node-name=file -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF

Any reason you're creating a device? query-named-block-nodes works 
without, too.

> +{ "execute": "qmp_capabilities" }
> +{ "execute": "query-named-block-nodes" }
> +{ "execute": "quit" }
> +EOF
> +
> +echo
> +echo === write-merging set to on ===
> +echo
> +
> +run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk,node-name=root,file.node-name=file,write-merging=on -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF
> +{ "execute": "qmp_capabilities" }
> +{ "execute": "query-block" }
> +{ "execute": "quit" }
> +EOF
> +
> +echo
> +echo === write-merging set to off ===
> +echo
> +
> +run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk,node-name=root,file.node-name=file,write-merging=off -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF
> +{ "execute": "qmp_capabilities" }
> +{ "execute": "query-block" }
> +{ "execute": "quit" }
> +EOF
> +
> +echo
> +echo === file.write-merging set to on ===
> +echo
> +
> +run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk,node-name=root,file.node-name=file,file.write-merging=on -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF
> +{ "execute": "qmp_capabilities" }
> +{ "execute": "query-block" }

You should be using query-named-block-nodes here (and probably 
everywhere else, too). See the test output for the next case, which 
never says anything about write-merging being off (aside from the 
beautiful json file name). [0]

> +{ "execute": "quit" }
> +EOF
> +
> +echo
> +echo === file.write-merging set to off ===
> +echo
> +
> +run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk,node-name=root,file.node-name=file,file.write-merging=off -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF
> +{ "execute": "qmp_capabilities" }
> +{ "execute": "query-block" }
> +{ "execute": "quit" }
> +EOF
> +
> +# success, all done
> +echo "*** done"
> +rm -f $seq.full
> +status=0
> diff --git a/tests/qemu-iotests/108.out b/tests/qemu-iotests/108.out
> new file mode 100644
> index 0000000..4fa687a
> --- /dev/null
> +++ b/tests/qemu-iotests/108.out
> @@ -0,0 +1,63 @@
> +QA output created by 108
> +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
> +
> +=== write-merging not specified ===
> +
> +Testing: -drive file=TEST_DIR/t.raw,format=raw,if=none,id=disk,node-name=root,file.node-name=file -device virtio-blk-pci,drive=disk,id=virtio0
> +QMP_VERSION
> +{"return": {}}
> +{"return": [{"iops_rd": 0, "detect_zeroes": "off", "write_merging": true, "image": {}, "iops_wr": 0, "ro": false, "node-name": "root", "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "TEST_DIR/t.raw", "encryption_key_missing": false}, {"iops_rd": 0, "detect_zeroes": "off", "write_merging": true, "image": {}, "iops_wr": 0, "ro": false, "node-name": "file", "backing_file_depth": 0, "drv": "file", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "TEST_DIR/t.raw", "encryption_key_missing": false}]}
> +{"return": {}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
> +
> +
> +=== write-merging set to on ===
> +
> +Testing: -drive file=TEST_DIR/t.raw,format=raw,if=none,id=disk,node-name=root,file.node-name=file,write-merging=on -device virtio-blk-pci,drive=disk,id=virtio0
> +QMP_VERSION
> +{"return": {}}
> +{"return": [{"io-status": "ok", "device": "disk", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "write_merging": true, "image": {"virtual-size": 134217728, "filename": "json:{\"write-merging\": \"on\", \"driver\": \"raw\", \"file\": {\"driver\": \"file\", \"filename\": \"TEST_DIR/t.raw\"}}", "format": "raw", "actual-size": 0, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "root", "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "json:{\"write-merging\": \"on\", \"driver\": \"raw\", \"file\": {\"driver\": \"file\", \"filename\": \"TEST_DIR/t.raw\"}}", "encryption_key_missing": false}, "type": "unknown"}, {"io-status": "ok", "device": "ide1-cd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "floppy0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "sd0", "locked": false, "remo
>   vable":
>   true, "tray_open": false, "type": "unknown"}]}

Just so you know, this line (and some more) has been split because of 
email™. Therefore, this patch doesn't apply until fixed manually. It 
might be worth specifying some branch on some repo where we can pull 
this series from.

> +{"return": {}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
> +
> +
> +=== write-merging set to off ===
> +
> +Testing: -drive file=TEST_DIR/t.raw,format=raw,if=none,id=disk,node-name=root,file.node-name=file,write-merging=off -device virtio-blk-pci,drive=disk,id=virtio0
> +QMP_VERSION
> +{"return": {}}
> +{"return": [{"io-status": "ok", "device": "disk", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "write_merging": false, "image": {"virtual-size": 134217728, "filename": "json:{\"write-merging\": \"off\", \"driver\": \"raw\", \"file\": {\"driver\": \"file\", \"filename\": \"TEST_DIR/t.raw\"}}", "format": "raw", "actual-size": 0, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "root", "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "json:{\"write-merging\": \"off\", \"driver\": \"raw\", \"file\": {\"driver\": \"file\", \"filename\": \"TEST_DIR/t.raw\"}}", "encryption_key_missing": false}, "type": "unknown"}, {"io-status": "ok", "device": "ide1-cd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "floppy0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "sd0", "locked": false, "r
>   emovable
>   ": true, "tray_open": false, "type": "unknown"}]}
> +{"return": {}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
> +
> +
> +=== file.write-merging set to on ===
> +
> +Testing: -drive file=TEST_DIR/t.raw,format=raw,if=none,id=disk,node-name=root,file.node-name=file,file.write-merging=on -device virtio-blk-pci,drive=disk,id=virtio0
> +QMP_VERSION
> +{"return": {}}
> +{"return": [{"io-status": "ok", "device": "disk", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "write_merging": true, "image": {"virtual-size": 134217728, "filename": "TEST_DIR/t.raw", "format": "raw", "actual-size": 0, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "root", "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "TEST_DIR/t.raw", "encryption_key_missing": false}, "type": "unknown"}, {"io-status": "ok", "device": "ide1-cd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "floppy0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "sd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}]}
> +{"return": {}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
> +
> +
> +=== file.write-merging set to off ===
> +
> +Testing: -drive file=TEST_DIR/t.raw,format=raw,if=none,id=disk,node-name=root,file.node-name=file,file.write-merging=off -device virtio-blk-pci,drive=disk,id=virtio0
> +QMP_VERSION
> +{"return": {}}
> +{"return": [{"io-status": "ok", "device": "disk", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "write_merging": true, "image": {"virtual-size": 134217728, "filename": "TEST_DIR/t.raw", "format": "raw", "actual-size": 0, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "root", "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "file": "TEST_DIR/t.raw", "encryption_key_missing": false}, "type": "unknown"}, {"io-status": "ok", "device": "ide1-cd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "floppy0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}, {"device": "sd0", "locked": false, "removable": true, "tray_open": false, "type": "unknown"}]}

[0] No '"write_merging": false' here...

Max

> +{"return": {}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
> +{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
> +
> +*** done
> diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
> index b230996..be2054f 100644
> --- a/tests/qemu-iotests/group
> +++ b/tests/qemu-iotests/group
> @@ -106,3 +106,4 @@
>   103 rw auto quick
>   104 rw auto
>   105 rw auto quick
> +108 rw auto quick