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virsh: use virConnectGetDomainCapabilities with maxvcpus

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virsh maxvcpus --type kvm output is useless on PPC. Also, in
commit e6806d79 we documented not rely on virConnectGetMaxVcpus
output. Fix the  maxvcpus to use virConnectGetDomainCapabilities
now to make it useful. The call is made to use the default emulator
binary and to check for the host machine and arch which is what the
command intends to show anyway.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
This commit is contained in:
Shivaprasad G Bhat 2016-09-07 14:25:42 +05:30 committed by Peter Krempa
parent 8563560026
commit 1ec22be550
1 changed files with 26 additions and 4 deletions
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30
tools/virsh-host.c
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@ -606,18 +606,40 @@ static bool
cmdMaxvcpus(vshControl *ctl, const vshCmd *cmd)
{
const char *type = NULL;
int vcpus;
int vcpus = -1;
char *caps = NULL;
xmlDocPtr xml = NULL;
xmlXPathContextPtr ctxt = NULL;
virshControlPtr priv = ctl->privData;
bool ret = false;
if (vshCommandOptStringReq(ctl, cmd, "type", &type) < 0)
return false;
if ((vcpus = virConnectGetMaxVcpus(priv->conn, type)) < 0)
return false;
if ((caps = virConnectGetDomainCapabilities(priv->conn, NULL, NULL, NULL,
type, 0))) {
if (!(xml = virXMLParseStringCtxt(caps, _("(domainCapabilities)"), &ctxt)))
goto cleanup;
ignore_value(virXPathInt("string(./vcpu[1]/@max)", ctxt, &vcpus));
} else {
if (last_error && last_error->code != VIR_ERR_NO_SUPPORT)
goto cleanup;
vshResetLibvirtError();
}
if (vcpus < 0 && (vcpus = virConnectGetMaxVcpus(priv->conn, type)) < 0)
goto cleanup;
vshPrint(ctl, "%d\n", vcpus);
ret = true;
return true;
cleanup:
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
VIR_FREE(caps);
return ret;
}
/*