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qemuValidateDomainDeviceDefDiskTransient: Validate that qemu doesn't terminate early

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Setup of a disk with <transient shareBacking='yes'/> option issues a
reset of qemu. In cases when QEMU didn't yet support the 'set-action'
QMP libvirt would in certain cases setup the commandline without
'-no-shutdown' which caused qemu to exit during startup. Forbid this
specific scenario.

Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Masayoshi Mizuma 2021-08-30 00:30:43 -04:00 committed by Peter Krempa
parent a2e6039cca
commit 131fddd429
1 changed files with 10 additions and 1 deletions
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11
src/qemu/qemu_validate.c
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@ -24,6 +24,7 @@
#include "qemu_block.h"
#include "qemu_command.h"
#include "qemu_domain.h"
#include "qemu_process.h"
#include "domain_conf.h"
#include "virlog.h"
#include "virutil.h"
@ -2991,6 +2992,7 @@ qemuValidateDomainDeviceDefDiskBlkdeviotune(const virDomainDiskDef *disk,
static int
qemuValidateDomainDeviceDefDiskTransient(const virDomainDiskDef *disk,
const virDomainDef *def,
virQEMUCaps *qemuCaps)
{
@ -3033,6 +3035,13 @@ qemuValidateDomainDeviceDefDiskTransient(const virDomainDiskDef *disk,
}
if (disk->transientShareBacking == VIR_TRISTATE_BOOL_YES) {
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_SET_ACTION) &&
!qemuProcessRebootAllowed(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("transient disk backing image sharing with destroy action of lifecycle isn't supported by this QEMU binary"));
return -1;
}
/* sharing the backing file requires hotplug of the disk in the qemu driver */
switch (disk->bus) {
case VIR_DOMAIN_DISK_BUS_USB:
@ -3077,7 +3086,7 @@ qemuValidateDomainDeviceDefDisk(const virDomainDiskDef *disk,
if (qemuValidateDomainDeviceDefDiskBlkdeviotune(disk, def) < 0)
return -1;
if (qemuValidateDomainDeviceDefDiskTransient(disk, qemuCaps) < 0)
if (qemuValidateDomainDeviceDefDiskTransient(disk, def, qemuCaps) < 0)
return -1;
if (disk->src->shared && !disk->src->readonly &&