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qemu: introduce chardevStdioLogd to qemu private data

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In QEMU driver we can use virtlogd as stdio handler for source backend
of char devices if current QEMU is new enough and it's enabled in
qemu.conf.  We should store this information while starting a guest
because the config option may change while the guest is running.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Pavel Hrdina 2017-06-15 08:34:55 +02:00
parent 1763a2e7e2
commit f9758109a7
3 changed files with 18 additions and 0 deletions
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6
src/qemu/qemu_domain.c
View File

@ -1885,6 +1885,9 @@ qemuDomainObjPrivateXMLFormat(virBufferPtr buf,
virCPUDefFormatBufFull(buf, priv->origCPU, NULL, false);
if (priv->chardevStdioLogd)
virBufferAddLit(buf, "<chardevStdioLogd/>");
return 0;
}
@ -2156,6 +2159,9 @@ qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt,
if (virCPUDefParseXML(ctxt, "./cpu", VIR_CPU_TYPE_GUEST, &priv->origCPU) < 0)
goto error;
priv->chardevStdioLogd = virXPathBoolean("boolean(./chardevStdioLogd)",
ctxt) == 1;
return 0;
error:

3
src/qemu/qemu_domain.h
View File

@ -297,6 +297,9 @@ struct _qemuDomainObjPrivate {
/* CPU def used to start the domain when it differs from the one actually
* provided by QEMU. */
virCPUDefPtr origCPU;
/* If true virtlogd is used as stdio handler for character devices. */
bool chardevStdioLogd;
};
# define QEMU_DOMAIN_PRIVATE(vm) \

9
src/qemu/qemu_process.c
View File

@ -5435,6 +5435,7 @@ qemuProcessPrepareDomain(virConnectPtr conn,
size_t i;
char *nodeset = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virCapsPtr caps;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
@ -5471,6 +5472,13 @@ qemuProcessPrepareDomain(virConnectPtr conn,
}
}
/* Whether we should use virtlogd as stdio handler for character
* devices source backend. */
if (cfg->stdioLogD &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_CHARDEV_FILE_APPEND)) {
priv->chardevStdioLogd = true;
}
/*
* Normally PCI addresses are assigned in the virDomainCreate
* or virDomainDefine methods. We might still need to assign
@ -5534,6 +5542,7 @@ qemuProcessPrepareDomain(virConnectPtr conn,
cleanup:
VIR_FREE(nodeset);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}