[libvirt] [PATCH v2 2/3] qemu: Only use HMP passthrough if it is supported
Eric Blake
eblake at redhat.com
Mon Mar 21 20:06:16 UTC 2011
On 03/21/2011 06:52 AM, Jiri Denemark wrote:
> Avoids calling text monitor methods when it is know they will not
> succeed and also results in nicer error messages.
> ---
> Notes:
> Version 2:
> - new patch
>
> - if (qemuMonitorJSONHasError(reply, "CommandNotFound")) {
> + if (qemuMonitorJSONHasError(reply, "CommandNotFound") &&
> + qemuMonitorCheckHMP(mon, "cpu_set")) {
> VIR_DEBUG0("cpu_set command not found, trying HMP");
So either we get a debug message about trying HMP, or we get a debug
message about skipping HMP. Looks nice.
> @@ -2466,6 +2470,12 @@ int qemuMonitorJSONArbitraryCommand(qemuMonitorPtr mon,
> int ret = -1;
>
> if (hmp) {
> + if (!qemuMonitorCheckHMP(mon, NULL)) {
> + qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
> + _("HMP passthrough is not supported by qemu"
> + " process; only QMP commands can be used"));
And this is the one place where it becomes a user-visible effect.
ACK.
--
Eric Blake eblake at redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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