[libvirt] [PATCH] virsh: fix vcpupin info

[Pavel Hrdina]

The "virDomainGetInfo" will get for running domain only live info and for
offline domain only config info. There was no way how to get config info
for running domain. We will use "vshCPUCountCollect" instead to get the
correct cpu count that we need to pass to "virDomainGetVcpuPinInfo".

Also cleanup some unnecessary variables and checks that are done by
drivers.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1160559

Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
---
 tests/vcpupin        |  2 +-
 tools/virsh-domain.c | 75 ++++++++++++++++++++++++----------------------------
 2 files changed, 35 insertions(+), 42 deletions(-)

diff --git a/tests/vcpupin b/tests/vcpupin
index 9f34ec0..cd09145 100755
--- a/tests/vcpupin
+++ b/tests/vcpupin
@@ -43,7 +43,7 @@ compare exp out || fail=1
 $abs_top_builddir/tools/virsh --connect test:///default vcpupin test 100 0,1 > out 2>&1
 test $? = 1 || fail=1
 cat <<\EOF > exp || fail=1
-error: vcpupin: vCPU index out of range.
+error: invalid argument: requested vcpu is higher than allocated vcpus
 
 EOF
 compare exp out || fail=1
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 2506b89..61a3385 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -6450,20 +6450,17 @@ vshParseCPUList(vshControl *ctl, const char *cpulist,
 static bool
 cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
 {
-    virDomainInfo info;
     virDomainPtr dom;
     unsigned int vcpu = 0;
     const char *cpulist = NULL;
     bool ret = false;
     unsigned char *cpumap = NULL;
-    unsigned char *cpumaps = NULL;
     size_t cpumaplen;
     int maxcpu, ncpus;
     size_t i;
     bool config = vshCommandOptBool(cmd, "config");
     bool live = vshCommandOptBool(cmd, "live");
     bool current = vshCommandOptBool(cmd, "current");
-    bool query = false; /* Query mode if no cpulist */
     int got_vcpu;
     unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT;
 
@@ -6481,48 +6478,47 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
     if (vshCommandOptStringReq(ctl, cmd, "cpulist", &cpulist) < 0)
         return false;
 
-    if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
-        return false;
-
-    query = !cpulist;
+    if (!cpulist)
+        VSH_EXCLUSIVE_OPTIONS_VAR(live, config);
 
     if ((got_vcpu = vshCommandOptUInt(cmd, "vcpu", &vcpu)) < 0) {
         vshError(ctl, "%s", _("vcpupin: Invalid vCPU number."));
-        goto cleanup;
+        return false;
     }
 
     /* In pin mode, "vcpu" is necessary */
-    if (!query && got_vcpu == 0) {
+    if (cpulist && got_vcpu == 0) {
         vshError(ctl, "%s", _("vcpupin: Missing vCPU number in pin mode."));
-        goto cleanup;
-    }
-
-    if (virDomainGetInfo(dom, &info) != 0) {
-        vshError(ctl, "%s", _("vcpupin: failed to get domain information."));
-        goto cleanup;
-    }
-
-    if (vcpu >= info.nrVirtCpu) {
-        vshError(ctl, "%s", _("vcpupin: vCPU index out of range."));
-        goto cleanup;
+        return false;
     }
 
     if ((maxcpu = vshNodeGetCPUCount(ctl->conn)) < 0)
-        goto cleanup;
-
+        return false;
     cpumaplen = VIR_CPU_MAPLEN(maxcpu);
 
+    if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
+        return false;
+
     /* Query mode: show CPU affinity information then exit.*/
-    if (query) {
+    if (!cpulist) {
         /* When query mode and neither "live", "config" nor "current"
          * is specified, set VIR_DOMAIN_AFFECT_CURRENT as flags */
         if (flags == -1)
             flags = VIR_DOMAIN_AFFECT_CURRENT;
 
-        cpumaps = vshMalloc(ctl, info.nrVirtCpu * cpumaplen);
-        if ((ncpus = virDomainGetVcpuPinInfo(dom, info.nrVirtCpu,
-                                             cpumaps, cpumaplen, flags)) >= 0) {
+        if ((ncpus = vshCPUCountCollect(ctl, dom, flags, true)) < 0) {
+            if (ncpus == -1) {
+                if (flags & VIR_DOMAIN_AFFECT_LIVE)
+                    vshError(ctl, "%s", _("cannot get vcpupin for offline domain"));
+                else
+                    vshError(ctl, "%s", _("cannot get vcpupin for transient domain"));
+            }
+            goto cleanup;
+        }
 
+        cpumap = vshMalloc(ctl, ncpus * cpumaplen);
+        if ((ncpus = virDomainGetVcpuPinInfo(dom, ncpus, cpumap,
+                                             cpumaplen, flags)) >= 0) {
             vshPrintExtra(ctl, "%s %s\n", _("VCPU:"), _("CPU Affinity"));
             vshPrintExtra(ctl, "----------------------------------\n");
             for (i = 0; i < ncpus; i++) {
@@ -6530,30 +6526,27 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd)
                    continue;
 
                vshPrint(ctl, "%4zu: ", i);
-               ret = vshPrintPinInfo(cpumaps, cpumaplen, maxcpu, i);
+               ret = vshPrintPinInfo(cpumap, cpumaplen, maxcpu, i);
                vshPrint(ctl, "\n");
                if (!ret)
                    break;
             }
         }
-
-        VIR_FREE(cpumaps);
-        goto cleanup;
-    }
-
-    /* Pin mode: pinning specified vcpu to specified physical cpus*/
-    if (!(cpumap = vshParseCPUList(ctl, cpulist, maxcpu, cpumaplen)))
-        goto cleanup;
-
-    if (flags == -1) {
-        if (virDomainPinVcpu(dom, vcpu, cpumap, cpumaplen) != 0)
-            goto cleanup;
     } else {
-        if (virDomainPinVcpuFlags(dom, vcpu, cpumap, cpumaplen, flags) != 0)
+        /* Pin mode: pinning specified vcpu to specified physical cpus*/
+        if (!(cpumap = vshParseCPUList(ctl, cpulist, maxcpu, cpumaplen)))
             goto cleanup;
+
+        if (flags == -1) {
+            if (virDomainPinVcpu(dom, vcpu, cpumap, cpumaplen) != 0)
+                goto cleanup;
+        } else {
+            if (virDomainPinVcpuFlags(dom, vcpu, cpumap, cpumaplen, flags) != 0)
+                goto cleanup;
+        }
+        ret = true;
     }
 
-    ret = true;
  cleanup:
     VIR_FREE(cpumap);
     virDomainFree(dom);
-- 
2.0.5