[libvirt] [PATCH 05/10] qemu: Pass correct qemuCaps to virDomainDefParseString

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(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 1139fde77a..3004433aa5 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -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; -- 2.22.0