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qemu: Implement virDomainGetGuestInfo()

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Iimplements the new guest information API by querying requested
information via the guest agent.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Jonathon Jongsma 2019-08-23 11:31:22 -05:00 committed by Michal Privoznik
parent a68ed9fc42
commit 02697fdbd1
1 changed files with 98 additions and 0 deletions
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98
src/qemu/qemu_driver.c
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@ -23201,6 +23201,103 @@ qemuDomainGetLaunchSecurityInfo(virDomainPtr domain,
return ret;
}
static const unsigned int supportedGuestInfoTypes =
VIR_DOMAIN_GUEST_INFO_USERS |
VIR_DOMAIN_GUEST_INFO_OS |
VIR_DOMAIN_GUEST_INFO_TIMEZONE |
VIR_DOMAIN_GUEST_INFO_HOSTNAME |
VIR_DOMAIN_GUEST_INFO_FILESYSTEM;
static void
qemuDomainGetGuestInfoCheckSupport(unsigned int *types)
{
if (*types == 0)
*types = supportedGuestInfoTypes;
*types = *types & supportedGuestInfoTypes;
}
static int
qemuDomainGetGuestInfo(virDomainPtr dom,
unsigned int types,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuAgentPtr agent;
int ret = -1;
int maxparams = 0;
VIR_AUTOFREE(char *) hostname = NULL;
unsigned int supportedTypes = types;
virCheckFlags(0, -1);
qemuDomainGetGuestInfoCheckSupport(&supportedTypes);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetGuestInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginAgentJob(driver, vm, QEMU_AGENT_JOB_QUERY) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
/* Although the libvirt qemu driver supports all of these guest info types,
* some guest agents might be too old to support these commands. If these
* info categories were explicitly requested (i.e. 'types' is non-zero),
* abort and report an error on any failures, otherwise continue and return
* as much info as is supported by the guest agent. */
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_USERS) {
if (qemuAgentGetUsers(agent, params, nparams, &maxparams) < 0 &&
types != 0)
goto exitagent;
}
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_OS) {
if (qemuAgentGetOSInfo(agent, params, nparams, &maxparams) < 0
&& types != 0)
goto exitagent;
}
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_TIMEZONE) {
if (qemuAgentGetTimezone(agent, params, nparams, &maxparams) < 0
&& types != 0)
goto exitagent;
}
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_HOSTNAME) {
if (qemuAgentGetHostname(agent, &hostname) < 0) {
if (types != 0)
goto exitagent;
} else {
if (virTypedParamsAddString(params, nparams, &maxparams, "hostname",
hostname) < 0)
goto exitagent;
}
}
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_FILESYSTEM) {
if (qemuAgentGetFSInfoParams(agent, params, nparams, &maxparams, vm->def) < 0 &&
types != 0)
goto exitagent;
}
ret = 0;
exitagent:
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndAgentJob(vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static virHypervisorDriver qemuHypervisorDriver = {
.name = QEMU_DRIVER_NAME,
.connectURIProbe = qemuConnectURIProbe,
@ -23436,6 +23533,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
.domainCheckpointLookupByName = qemuDomainCheckpointLookupByName, /* 5.6.0 */
.domainCheckpointGetParent = qemuDomainCheckpointGetParent, /* 5.6.0 */
.domainCheckpointDelete = qemuDomainCheckpointDelete, /* 5.6.0 */
.domainGetGuestInfo = qemuDomainGetGuestInfo, /* 5.7.0 */
};