Re: [PATCH] virsh: report error if vcpu number exceed the guest maxvcpu number

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On 07/02/2015 06:28 PM, John Ferlan wrote:

On 07/02/2015 05:46 AM, Pavel Hrdina wrote:

...

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 27d62e9..334fd3a 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -6497,6 +6497,19 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
               goto cleanup;
           }

+        if (got_vcpu && vcpu >= ncpus) {
+            if (flags & VIR_DOMAIN_AFFECT_LIVE ||
+                (flags & VIR_DOMAIN_AFFECT_CURRENT &&
virDomainIsActive(dom) == 1))
+                vshError(ctl,
+                         _("vcpu %d is out of range of live cpu count %d"),
+                         vcpu, ncpus);
+            else
+                vshError(ctl,
+                         _("vcpu %d is out of range of persistent cpu
count %d"),
+                         vcpu, ncpus);
+            goto cleanup;
+        }
+
           cpumaplen = VIR_CPU_MAPLEN(maxcpu);
           cpumap = vshMalloc(ctl, ncpus * cpumaplen);
           if ((ncpus = virDomainGetVcpuPinInfo(dom, ncpus, cpumap,

This modification is much better and correspond to the error messages while
setting the vcpu pinning.

I just pushed this now - it'd need a bz for a backport (ahem) since
1.2.17 was cut before the push...


commit 848ab685f74afae102e265108518095942ecb293
Author: Luyao Huang <lhuang@xxxxxxxxxx>
Date:   Mon Jun 29 10:10:15 2015 +0800

     virsh: report error if vcpu number exceed the guest maxvcpu number

Okay, i will help to find a bz for this patch.

thanks a lot for your help and review, Pavel and John :)

John

Luyao

Before I make that change for you - hopefully Pavel can take a look as
well to be sure I haven't missed something.

With any luck we this could be addressed before the 1.2.17 release, but
if not since it's been a regression since 1.2.13 and no one's noticed,
then another release probably won't hurt.
Right, if we can fix it in 1.2.17, it will be better :)

Thanks a lot for your help and review.

ACK to the patch than John updated and proposed.


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