[libvirt] [PATCH 2/6] cputune: support cputune for xend driver

[Osier Yang]

Didn't test it, and not sure if it's the correct way to add cputune
xml for xend driver, and besides, seems "xm driver" and "xen hypervisor"
also support vcpu affinity, do we need to add support for them too?

Any suggestion on supporting cputune for xen is appreciated. :-)
---
 src/xen/xend_internal.c |   29 +++++++++++++++++++++++++----
 1 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
index bfaed65..852153b 100644
--- a/src/xen/xend_internal.c
+++ b/src/xen/xend_internal.c
@@ -2233,11 +2233,12 @@ xenDaemonDomainSetVcpusFlags(virDomainPtr domain, unsigned int vcpus,
  */
 int
 xenDaemonDomainPinVcpu(virDomainPtr domain, unsigned int vcpu,
-                     unsigned char *cpumap, int maplen)
+                       unsigned char *cpumap, int maplen)
 {
     char buf[VIR_UUID_BUFLEN], mapstr[sizeof(cpumap_t) * 64];
-    int i, j;
+    int i, j, ret;
     xenUnifiedPrivatePtr priv;
+    virDomainDefPtr def = NULL;
 
     if ((domain == NULL) || (domain->conn == NULL) || (domain->name == NULL)
      || (cpumap == NULL) || (maplen < 1) || (maplen > (int)sizeof(cpumap_t))) {
@@ -2265,8 +2266,28 @@ xenDaemonDomainPinVcpu(virDomainPtr domain, unsigned int vcpu,
         mapstr[strlen(mapstr) - 1] = 0;
 
     snprintf(buf, sizeof(buf), "%d", vcpu);
-    return(xend_op(domain->conn, domain->name, "op", "pincpu", "vcpu", buf,
-                  "cpumap", mapstr, NULL));
+    ret = xend_op(domain->conn, domain->name, "op", "pincpu", "vcpu", buf,
+                  "cpumap", mapstr, NULL);
+
+    if (!(def = xenDaemonDomainFetch(domain->conn,
+                                     domain->id,
+                                     domain->name,
+                                     NULL)))
+        goto cleanup;
+
+    if (ret == 0) {
+        if (virDomainVcpupinAdd(def, cpumap, maplen, vcpu) < 0) {
+            virXendError(VIR_ERR_INTERNAL_ERROR,
+                         "%s", _("failed to add vcpupin xml entry"));
+            return (-1);
+        }
+    }
+
+    return ret;
+
+cleanup:
+    virDomainDefFree(def);
+    return -1;
 }
 
 /**
-- 
1.7.4