From: Paolo Bonzini <pbonzini@redhat.com>
To: Christian Schoenebeck <qemu_oss@crudebyte.com>, qemu-devel@nongnu.org
Cc: Laurent Vivier <lvivier@redhat.com>,
Thomas Huth <thuth@redhat.com>,
Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>,
Greg Kurz <groug@kaod.org>
Subject: Re: [PATCH 08/12] tests/9pfs: refactor test names and test devices
Date: Thu, 1 Oct 2020 16:04:39 +0200 [thread overview]
Message-ID: <bbfcbc42-a7f4-926f-78ef-badcb7c023af@redhat.com> (raw)
In-Reply-To: <12227378.mPQFScNTDJ@silver>
On 01/10/20 14:15, Christian Schoenebeck wrote:
> On Donnerstag, 1. Oktober 2020 13:56:42 CEST Paolo Bonzini wrote:
>> On 01/10/20 13:34, Christian Schoenebeck wrote:
>>> Paolo, I'm back at square one after changing to single-device model as you
>>> suggested:
>>>
>>> GTest: run:
>>> /x86_64/pc/i440FX-pcihost/pci-bus-pc/pci-bus/virtio-9p-pci/pci-
>>> device/pci-device-tests/nop
>>> Run QEMU with: '-M pc -device virtio-9p-pci'
>>> (MSG: starting QEMU: exec x86_64-softmmu/qemu-system-x86_64 -qtest
>>> unix:/tmp/ qtest-18032.sock -qtest-log /dev/null -chardev
>>> socket,path=/tmp/
>>> qtest-18032.qmp,id=char0 -mon chardev=char0,mode=control -display none -M
>>> pc -device virtio-9p-pci -accel qtest)
>>> qemu-system-x86_64: -device virtio-9p-pci: 9pfs device couldn't find fsdev
>>> with the id = NULL
>>> Broken pipe
>>>
>>> This fundamental virtio-9p-pci test obviously needs a complete 9p command
>>> line, that is either a 'synth' driver one, or a 'local' one. But simply
>>> either picking one or another is inappropriate here. This test should run
>>> once for 'synth' and once for 'local'.
>>
>> You're right, this is in fact also a problem for virtio-blk and virtio-net:
>>
>> /* FIXME: every test using these two nodes needs to setup a
>> * -drive,id=drive0 otherwise QEMU is not going to start.
>> * Therefore, we do not include "produces" edge for virtio
>> * and pci-device yet.
>> */
>>
>> /* FIXME: every test using these nodes needs to setup a
>> * -netdev socket,id=hs0 otherwise QEMU is not going to start.
>> * Therefore, we do not include "produces" edge for virtio
>> * and pci-device yet.
>> */
>>
>> I still think we should do it like this, because it's closer to the way
>> that libqos will work long term.
>
> Could you please elaborate why that long term plan bites with the working
> solution I provided? [patches 1 and 2]
Because the long term plan is to have a socket/plug mechanism for
backends where the device can provide a default backend to plug.
The suggested solution is all good for *a different use case*, namely to
test the same device with different options. It is just wrong for the
purpose of selecting a frontend.
It occurred to me that you could also add a default backend to the
command line with "-fsdev" (in the libqos driver), and use -set in the
test to override it. This is ugly (-set is ugly!) but it would let you
keep the tests, so it would probably be the best solution.
Paolo
next prev parent reply other threads:[~2020-10-01 14:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-27 10:43 [PATCH 00/12] 9pfs: add tests using local fs driver Christian Schoenebeck
2020-09-27 10:38 ` [PATCH 01/12] tests/qtest/qgraph: add qemu_name to QOSGraphNode Christian Schoenebeck
2020-09-27 10:39 ` [PATCH 02/12] tests/qtest/qgraph: add qos_node_create_driver_named() Christian Schoenebeck
2020-09-27 10:39 ` [PATCH 03/12] tests/qtest/qos: add qos_dump_graph() Christian Schoenebeck
2020-09-27 10:39 ` [PATCH 04/12] tests/qtest/qos-test: new QTEST_DUMP_GRAPH environment variable Christian Schoenebeck
2020-09-27 10:39 ` [PATCH 05/12] tests/qtest/qos-test: add QTEST_DUMP_ENV " Christian Schoenebeck
2020-09-27 10:40 ` [PATCH 06/12] tests/qtest/qos-test: add environment variable QTEST_DEBUG Christian Schoenebeck
2020-09-28 8:31 ` Paolo Bonzini
2020-09-28 12:11 ` Christian Schoenebeck
2020-09-27 10:40 ` [PATCH 07/12] test/9pfs: change export tag name to qtest-synth Christian Schoenebeck
2020-09-27 10:40 ` [PATCH 08/12] tests/9pfs: refactor test names and test devices Christian Schoenebeck
2020-09-28 8:36 ` Paolo Bonzini
2020-09-28 8:37 ` Paolo Bonzini
2020-09-28 11:56 ` Christian Schoenebeck
2020-09-28 12:42 ` Paolo Bonzini
2020-09-28 13:35 ` Christian Schoenebeck
2020-09-28 16:38 ` Paolo Bonzini
2020-10-01 11:34 ` Christian Schoenebeck
2020-10-01 11:56 ` Paolo Bonzini
2020-10-01 12:15 ` Christian Schoenebeck
2020-10-01 14:04 ` Paolo Bonzini [this message]
2020-10-01 15:26 ` Christian Schoenebeck
2020-09-27 10:40 ` [PATCH 09/12] tests/9pfs: introduce local tests Christian Schoenebeck
2020-09-27 10:41 ` [PATCH 10/12] tests/9pfs: wipe local 9pfs test directory Christian Schoenebeck
2020-09-27 10:41 ` [PATCH 11/12] tests/9pfs: add virtio_9p_test_path() Christian Schoenebeck
2020-09-27 10:41 ` [PATCH 12/12] tests/9pfs: add local Tmkdir test Christian Schoenebeck
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