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qemu: Pass correct qemuCaps to virDomainDefParseString

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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 virDomainDefParseString.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Jiri Denemark 2019-08-05 16:26:29 +02:00
parent b900f7387f
commit 6e7c33dad7
1 changed files with 6 additions and 3 deletions
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9
src/qemu/qemu_driver.c
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@ -3437,7 +3437,8 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver,
if (xmlin) {
virDomainDefPtr def = NULL;
if (!(def = virDomainDefParseString(xmlin, caps, driver->xmlopt, NULL,
if (!(def = virDomainDefParseString(xmlin, caps, driver->xmlopt,
priv->qemuCaps,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE))) {
goto endjob;
@ -15907,7 +15908,8 @@ qemuDomainSnapshotCreateXML(virDomainPtr domain,
if (!(xml = qemuDomainDefFormatLive(driver, priv->qemuCaps,
vm->def, priv->origCPU,
true, true)) ||
!(def->parent.dom = virDomainDefParseString(xml, caps, driver->xmlopt, NULL,
!(def->parent.dom = virDomainDefParseString(xml, caps, driver->xmlopt,
priv->qemuCaps,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto endjob;
@ -17008,7 +17010,8 @@ qemuDomainCheckpointPrepare(virQEMUDriverPtr driver, virCapsPtr caps,
if (!(xml = qemuDomainDefFormatLive(driver, priv->qemuCaps,
vm->def, priv->origCPU,
true, true)) ||
!(def->parent.dom = virDomainDefParseString(xml, caps, driver->xmlopt, NULL,
!(def->parent.dom = virDomainDefParseString(xml, caps, driver->xmlopt,
priv->qemuCaps,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto cleanup;