From 215a509da9a0a8918ab1bfbd0f6ccfb765578f0f Mon Sep 17 00:00:00 2001 From: Markus Armbruster <armbru@redhat.com> Date: Thu, 6 Jun 2019 19:15:22 +0100 Subject: [PATCH 5/8] virtio-scsi: Move BlockBackend back to the main AioContext on unplug RH-Author: Markus Armbruster <armbru@redhat.com> Message-id: <20190606191524.30797-2-armbru@redhat.com> Patchwork-id: 88607 O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 1/3] virtio-scsi: Move BlockBackend back to the main AioContext on unplug Bugzilla: 1673396 1673401 RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com> RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com> RH-Acked-by: Kevin Wolf <kwolf@redhat.com> From: Alberto Garcia <berto@igalia.com> This fixes a crash when attaching a disk to a SCSI device using iothreads, then detaching it and reattaching it again. Test case included. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> (cherry picked from commit a6f230c8d13a7ff3a0c7f1097412f44bfd9eff0b) [Trivial conflict in tests/qemu-iotests/group resolved] Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com> --- hw/scsi/virtio-scsi.c | 6 ++++ tests/qemu-iotests/240 | 89 ++++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/240.out | 18 ++++++++++ tests/qemu-iotests/group | 1 + 4 files changed, 114 insertions(+) create mode 100755 tests/qemu-iotests/240 create mode 100644 tests/qemu-iotests/240.out diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 52a3c1d..85073f6 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -841,6 +841,12 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, virtio_scsi_release(s); } + if (s->ctx) { + virtio_scsi_acquire(s); + blk_set_aio_context(sd->conf.blk, qemu_get_aio_context()); + virtio_scsi_release(s); + } + qdev_simple_device_unplug_cb(hotplug_dev, dev, errp); } diff --git a/tests/qemu-iotests/240 b/tests/qemu-iotests/240 new file mode 100755 index 0000000..ead7ee0 --- /dev/null +++ b/tests/qemu-iotests/240 @@ -0,0 +1,89 @@ +#!/bin/bash +# +# Test hot plugging and unplugging with iothreads +# +# Copyright (C) 2019 Igalia, S.L. +# Author: Alberto Garcia <berto@igalia.com> +# +# 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=berto@igalia.com + +seq=`basename $0` +echo "QA output created by $seq" + +status=1 # failure is the default! + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt generic +_supported_proto generic +_supported_os Linux + +do_run_qemu() +{ + echo Testing: "$@" + $QEMU -nographic -qmp stdio -serial none "$@" + echo +} + +# Remove QMP events from (pretty-printed) output. Doesn't handle +# nested dicts correctly, but we don't get any of those in this test. +_filter_qmp_events() +{ + tr '\n' '\t' | sed -e \ + 's/{\s*"timestamp":\s*{[^}]*},\s*"event":[^,}]*\(,\s*"data":\s*{[^}]*}\)\?\s*}\s*//g' \ + | tr '\t' '\n' +} + +run_qemu() +{ + do_run_qemu "$@" 2>&1 | _filter_qmp | _filter_qmp_events +} + +case "$QEMU_DEFAULT_MACHINE" in + s390-ccw-virtio) + virtio_scsi=virtio-scsi-ccw + ;; + *) + virtio_scsi=virtio-scsi-pci + ;; +esac + +echo +echo === Unplug a SCSI disk and then plug it again === +echo + +run_qemu <<EOF +{ "execute": "qmp_capabilities" } +{ "execute": "blockdev-add", "arguments": {"driver": "null-co", "node-name": "hd0"}} +{ "execute": "object-add", "arguments": {"qom-type": "iothread", "id": "iothread0"}} +{ "execute": "device_add", "arguments": {"id": "scsi0", "driver": "${virtio_scsi}", "iothread": "iothread0"}} +{ "execute": "device_add", "arguments": {"id": "scsi-hd0", "driver": "scsi-hd", "drive": "hd0"}} +{ "execute": "device_del", "arguments": {"id": "scsi-hd0"}} +{ "execute": "device_add", "arguments": {"id": "scsi-hd0", "driver": "scsi-hd", "drive": "hd0"}} +{ "execute": "device_del", "arguments": {"id": "scsi-hd0"}} +{ "execute": "device_del", "arguments": {"id": "scsi0"}} +{ "execute": "blockdev-del", "arguments": {"node-name": "hd0"}} +{ "execute": "quit"} +EOF + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/240.out b/tests/qemu-iotests/240.out new file mode 100644 index 0000000..432d981 --- /dev/null +++ b/tests/qemu-iotests/240.out @@ -0,0 +1,18 @@ +QA output created by 240 + +=== Unplug a SCSI disk and then plug it again === + +Testing: +QMP_VERSION +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +{"return": {}} +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index 61c0f9c..5cbdc24 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -226,3 +226,4 @@ 231 auto quick 232 auto quick 234 auto quick migration +240 auto quick -- 1.8.3.1