Qemu has now an internal mechanism for locking images to fix specific cases of disk corruption. This requires libvirt to mark the image as shared so that qemu lifts certain restrictions.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1378242 --- src/qemu/qemu_command.c | 4 +++ .../qemuxml2argv-disk-drive-shared-locking.args | 28 +++++++++++++++++ .../qemuxml2argv-disk-drive-shared-locking.xml | 36 ++++++++++++++++++++++ tests/qemuxml2argvtest.c | 2 ++ 4 files changed, 70 insertions(+) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 56729e498..e8534771e 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -2070,6 +2070,10 @@ qemuBuildDriveDevStr(const virDomainDef *def, virBufferAsprintf(&opt, ",num-queues=%u", disk->queues); } + if (disk->src->shared && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_DRIVE_SHARE_RW)) + virBufferAddLit(&opt, ",share-rw=on"); + if (qemuBuildVirtioOptionsStr(&opt, disk->virtio, qemuCaps) < 0) goto error; diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args new file mode 100644 index 000000000..326fde1b3 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.args @@ -0,0 +1,28 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/home/test \ +USER=test \ +LOGNAME=test \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-i686 \ +-name QEMUGuest1 \ +-S \ +-M pc \ +-m 214 \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefaults \ +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\ +server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=readline \ +-no-acpi \ +-boot c \ +-usb \ +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0,\ +serial=XYZXYZXYZYXXYZYZYXYZY,cache=none \ +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ +-drive file=/dev/HostVG/QEMUGuest2,format=raw,if=none,media=cdrom,\ +id=drive-ide0-1-0,readonly=on \ +-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml new file mode 100644 index 000000000..677c2b0b7 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared-locking.xml @@ -0,0 +1,36 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i686</emulator> + <disk type='block' device='disk'> + <driver name='qemu' type='raw'/> + <source dev='/dev/HostVG/QEMUGuest1'/> + <target dev='hda' bus='ide'/> + <shareable/> + <serial>XYZXYZXYZYXXYZYZYXYZY</serial> + <address type='drive' controller='0' bus='0' target='0' unit='0'/> + </disk> + <disk type='block' device='cdrom'> + <driver name='qemu' type='raw'/> + <source dev='/dev/HostVG/QEMUGuest2'/> + <target dev='hdc' bus='ide'/> + <readonly/> + <address type='drive' controller='0' bus='1' target='0' unit='0'/> + </disk> + <controller type='usb' index='0'/> + <controller type='ide' index='0'/> + <memballoon model='virtio'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index bfced6dda..e72aabe20 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -909,6 +909,8 @@ mymain(void) DO_TEST("disk-drive-shared", QEMU_CAPS_DRIVE_SERIAL); DO_TEST_PARSE_ERROR("disk-drive-shared-qcow", NONE); + DO_TEST("disk-drive-shared-locking", + QEMU_CAPS_DRIVE_SERIAL, QEMU_CAPS_DRIVE_SHARE_RW); DO_TEST("disk-drive-error-policy-stop", QEMU_CAPS_MONITOR_JSON); DO_TEST("disk-drive-error-policy-enospace", -- 2.14.3 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
