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qemu: do upfront check for vcpupids being null when querying pinning

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The qemuDomainHelperGetVcpus attempted to report an error when the
vcpupids info was NULL. Unfortunately earlier code would clamp the
value of 'maxinfo' to 0 when nvcpupids was 0, so the error reporting
would end up being skipped.

This lead to 'virsh vcpuinfo <dom>' just returning an empty list
instead of giving the user a clear error.
This commit is contained in:
Daniel P. Berrange 2015-02-10 16:23:16 +00:00
parent a103bb105c
commit 9358b63a0d
1 changed files with 21 additions and 22 deletions
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43
src/qemu/qemu_driver.c
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@ -1376,6 +1376,12 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm, virVcpuInfoPtr info, int maxinfo,
if ((hostcpus = nodeGetCPUCount()) < 0)
return -1;
if (priv->vcpupids == NULL) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
return -1;
}
maxcpu = maplen * 8;
if (maxcpu > hostcpus)
maxcpu = hostcpus;
@ -1391,8 +1397,7 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm, virVcpuInfoPtr info, int maxinfo,
info[i].number = i;
info[i].state = VIR_VCPU_RUNNING;
if (priv->vcpupids != NULL &&
qemuGetProcessInfo(&(info[i].cpuTime),
if (qemuGetProcessInfo(&(info[i].cpuTime),
&(info[i].cpu),
NULL,
vm->pid,
@ -1406,28 +1411,22 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm, virVcpuInfoPtr info, int maxinfo,
if (cpumaps != NULL) {
memset(cpumaps, 0, maplen * maxinfo);
if (priv->vcpupids != NULL) {
for (v = 0; v < maxinfo; v++) {
unsigned char *cpumap = VIR_GET_CPUMAP(cpumaps, maplen, v);
virBitmapPtr map = NULL;
unsigned char *tmpmap = NULL;
int tmpmapLen = 0;
for (v = 0; v < maxinfo; v++) {
unsigned char *cpumap = VIR_GET_CPUMAP(cpumaps, maplen, v);
virBitmapPtr map = NULL;
unsigned char *tmpmap = NULL;
int tmpmapLen = 0;
if (virProcessGetAffinity(priv->vcpupids[v],
&map, maxcpu) < 0)
return -1;
virBitmapToData(map, &tmpmap, &tmpmapLen);
if (tmpmapLen > maplen)
tmpmapLen = maplen;
memcpy(cpumap, tmpmap, tmpmapLen);
if (virProcessGetAffinity(priv->vcpupids[v],
&map, maxcpu) < 0)
return -1;
virBitmapToData(map, &tmpmap, &tmpmapLen);
if (tmpmapLen > maplen)
tmpmapLen = maplen;
memcpy(cpumap, tmpmap, tmpmapLen);
VIR_FREE(tmpmap);
virBitmapFree(map);
}
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not available"));
return -1;
VIR_FREE(tmpmap);
virBitmapFree(map);
}
}
}