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qemu: Pass correct qemuCaps to virDomainDefPostParse

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Since qemuDomainDefPostParse callback requires qemuCaps, we need to make
sure it gets the capabilities stored in the domain's private data if the
domain is running. Passing NULL may cause QEMU capabilities probing to
be triggered in case QEMU binary changed in the meantime. When this
happens while a running domain object is locked, QMP event delivered to
the domain before QEMU capabilities probing finishes will deadlock the
event loop.

This patch fixes all paths leading to virDomainDefPostParse.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Jiri Denemark 2019-08-06 13:53:11 +02:00
parent bbcfa07bea
commit c90fb5a828
2 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/qemu/qemu_driver.c
View File

@ -8326,6 +8326,7 @@ static int
qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virCapsPtr caps,
virQEMUCapsPtr qemuCaps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
@ -8517,7 +8518,7 @@ qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, qemuCaps) < 0)
return -1;
return 0;
@ -8528,6 +8529,7 @@ static int
qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virCapsPtr caps,
virQEMUCapsPtr qemuCaps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
@ -8709,7 +8711,7 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, qemuCaps) < 0)
return -1;
return 0;
@ -8719,6 +8721,7 @@ static int
qemuDomainUpdateDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virCapsPtr caps,
virQEMUCapsPtr qemuCaps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
@ -8814,7 +8817,7 @@ qemuDomainUpdateDeviceConfig(virDomainDefPtr vmdef,
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, qemuCaps) < 0)
return -1;
return 0;
@ -8866,7 +8869,7 @@ qemuDomainAttachDeviceLiveAndConfig(virDomainObjPtr vm,
false) < 0)
goto cleanup;
if (qemuDomainAttachDeviceConfig(vmdef, devConf, caps,
if (qemuDomainAttachDeviceConfig(vmdef, devConf, caps, priv->qemuCaps,
parse_flags,
driver->xmlopt) < 0)
goto cleanup;
@ -9031,7 +9034,7 @@ static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
/* virDomainDefCompatibleDevice call is delayed until we know the
* device we're going to update. */
if ((ret = qemuDomainUpdateDeviceConfig(vmdef, dev, caps,
if ((ret = qemuDomainUpdateDeviceConfig(vmdef, dev, caps, priv->qemuCaps,
parse_flags,
driver->xmlopt)) < 0)
goto endjob;
@ -9126,7 +9129,7 @@ qemuDomainDetachDeviceLiveAndConfig(virQEMUDriverPtr driver,
if (!vmdef)
goto cleanup;
if (qemuDomainDetachDeviceConfig(vmdef, dev, caps,
if (qemuDomainDetachDeviceConfig(vmdef, dev, caps, priv->qemuCaps,
parse_flags,
driver->xmlopt) < 0)
goto cleanup;
@ -9212,7 +9215,7 @@ qemuDomainDetachDeviceAliasLiveAndConfig(virQEMUDriverPtr driver,
if (virDomainDefFindDevice(vmdef, alias, &dev, true) < 0)
goto cleanup;
if (qemuDomainDetachDeviceConfig(vmdef, &dev, caps,
if (qemuDomainDetachDeviceConfig(vmdef, &dev, caps, priv->qemuCaps,
parse_flags, driver->xmlopt) < 0)
goto cleanup;
}

2
src/qemu/qemu_process.c
View File

@ -5615,7 +5615,7 @@ qemuProcessInit(virQEMUDriverPtr driver,
if (vm->def->postParseFailed) {
VIR_DEBUG("re-running the post parse callback");
if (virDomainDefPostParse(vm->def, caps, 0, driver->xmlopt, NULL) < 0)
if (virDomainDefPostParse(vm->def, caps, 0, driver->xmlopt, priv->qemuCaps) < 0)
goto cleanup;
}