[libvirt] PATCH: Fix XM driver to extract vifname= parameter

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

The XM driver is not currently handling the vifname= parameter for 
network devices in /etc/xen config files. This patch fixes that
ommision

Daniel

diff -r e396919fa59e src/xm_internal.c
--- a/src/xm_internal.c	Tue Mar 31 16:35:42 2009 +0100
+++ b/src/xm_internal.c	Tue Mar 31 16:58:11 2009 +0100
@@ -991,6 +991,7 @@ xenXMDomainConfigParse(virConnectPtr con
             char ip[16];
             char mac[18];
             char bridge[50];
+            char vifname[50];
             char *key;
 
             bridge[0] = '\0';
@@ -998,6 +999,7 @@ xenXMDomainConfigParse(virConnectPtr con
             script[0] = '\0';
             ip[0] = '\0';
             model[0] = '\0';
+            vifname[0] = '\0';
 
             if ((list->type != VIR_CONF_STRING) || (list->str == NULL))
                 goto skipnic;
@@ -1036,6 +1038,12 @@ xenXMDomainConfigParse(virConnectPtr con
                         len = sizeof(model)-1;
                     strncpy(model, data, len);
                     model[len] = '\0';
+                } else if (STRPREFIX(key, "vifname=")) {
+                    int len = nextkey ? (nextkey - data) : sizeof(vifname)-1;
+                    if (len > (sizeof(vifname)-1))
+                        len = sizeof(vifname)-1;
+                    strncpy(vifname, data, len);
+                    vifname[len] = '\0';
                 } else if (STRPREFIX(key, "ip=")) {
                     int len = nextkey ? (nextkey - data) : 15;
                     if (len > 15)
@@ -1105,6 +1113,10 @@ xenXMDomainConfigParse(virConnectPtr con
                 !(net->model = strdup(model)))
                 goto no_memory;
 
+            if (vifname[0] &&
+                !(net->ifname = strdup(vifname)))
+                goto no_memory;
+
             if (VIR_REALLOC_N(def->nets, def->nnets+1) < 0)
                 goto no_memory;
             def->nets[def->nnets++] = net;
@@ -1994,6 +2006,10 @@ static int xenXMDomainConfigFormatNet(vi
         virBufferVSprintf(&buf, ",model=%s",
                           net->model);
 
+    if (net->ifname)
+        virBufferVSprintf(&buf, ",vifname=%s",
+                          net->ifname);
+
     if (VIR_ALLOC(val) < 0) {
         virReportOOMError(conn);
         goto cleanup;
diff -r e396919fa59e tests/xmconfigdata/test-paravirt-net-vifname.cfg
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/xmconfigdata/test-paravirt-net-vifname.cfg	Tue Mar 31 16:58:11 2009 +0100
@@ -0,0 +1,12 @@
+name = "XenGuest1"
+uuid = "c7a5fdb0-cdaf-9455-926a-d65c16db1809"
+maxmem = 579
+memory = 394
+vcpus = 1
+bootloader = "/usr/bin/pygrub"
+on_poweroff = "destroy"
+on_reboot = "restart"
+on_crash = "restart"
+vfb = [ "type=vnc,vncunused=1,vnclisten=127.0.0.1,vncpasswd=123poi" ]
+disk = [ "phy:/dev/HostVG/XenGuest1,xvda,w" ]
+vif = [ "mac=00:16:3e:66:94:9c,bridge=br0,model=e1000,vifname=net0" ]
diff -r e396919fa59e tests/xmconfigdata/test-paravirt-net-vifname.xml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/xmconfigdata/test-paravirt-net-vifname.xml	Tue Mar 31 16:58:11 2009 +0100
@@ -0,0 +1,33 @@
+<domain type='xen'>
+  <name>XenGuest1</name>
+  <uuid>c7a5fdb0-cdaf-9455-926a-d65c16db1809</uuid>
+  <memory>592896</memory>
+  <currentMemory>403456</currentMemory>
+  <vcpu>1</vcpu>
+  <bootloader>/usr/bin/pygrub</bootloader>
+  <os>
+    <type arch='i686' machine='xenpv'>linux</type>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <disk type='block' device='disk'>
+      <driver name='phy'/>
+      <source dev='/dev/HostVG/XenGuest1'/>
+      <target dev='xvda' bus='xen'/>
+    </disk>
+    <interface type='bridge'>
+      <mac address='00:16:3e:66:94:9c'/>
+      <source bridge='br0'/>
+      <target dev='net0'/>
+      <model type='e1000'/>
+    </interface>
+    <console type='pty'>
+      <target port='0'/>
+    </console>
+    <input type='mouse' bus='xen'/>
+    <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1' passwd='123poi'/>
+  </devices>
+</domain>
diff -r e396919fa59e tests/xmconfigtest.c
--- a/tests/xmconfigtest.c	Tue Mar 31 16:35:42 2009 +0100
+++ b/tests/xmconfigtest.c	Tue Mar 31 16:58:11 2009 +0100
@@ -209,6 +209,7 @@ mymain(int argc, char **argv)
     DO_TEST("paravirt-new-pvfb", 3);
     DO_TEST("paravirt-new-pvfb-vncdisplay", 3);
     DO_TEST("paravirt-net-e1000", 3);
+    DO_TEST("paravirt-net-vifname", 3);
     DO_TEST("fullvirt-old-cdrom", 1);
     DO_TEST("fullvirt-new-cdrom", 2);
     DO_TEST("fullvirt-utc", 2);


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