[libvirt] [PATCH 2/2] virsh: extend domif-{get, set}link command to accept target name as a parameter

[Taku Izumi]

Other virsh domifXXX commands can accept target name 
as a parameter to specify interface. From viewpoint of
consistency, virsh domif-setlink command should accept
target name as a parameter. This patch achieves this.

Signd-off-by: Taku Izumi <izumi.taku at jp.fujitsu.com>
---
 tools/virsh.c   |   25 ++++++++++++++++++-------
 tools/virsh.pod |    3 ++-
 2 files changed, 20 insertions(+), 8 deletions(-)

Index: libvirt/tools/virsh.c
===================================================================
--- libvirt.orig/tools/virsh.c
+++ libvirt/tools/virsh.c
@@ -1344,8 +1344,11 @@ cmdDomIfSetLink (vshControl *ctl, const 
     virDomainPtr dom;
     const char *iface;
     const char *state;
-    const char *mac;
+    const char *value;
     const char *desc;
+    unsigned char macaddr[VIR_MAC_BUFLEN];
+    const char *element;
+    const char *attribute;
     bool persistent;
     bool ret = false;
     unsigned int flags = 0;
@@ -1405,26 +1408,34 @@ cmdDomIfSetLink (vshControl *ctl, const 
         goto cleanup;
     }
 
+    if (virParseMacAddr(iface, macaddr) == 0) {
+        element = "mac";
+        attribute = "address";
+    } else {
+        element = "target";
+        attribute = "dev";
+    }
+
     /* find interface with matching mac addr */
     for (i = 0; i < obj->nodesetval->nodeNr; i++) {
         cur = obj->nodesetval->nodeTab[i]->children;
 
         while (cur) {
             if (cur->type == XML_ELEMENT_NODE &&
-                xmlStrEqual(cur->name, BAD_CAST "mac")) {
-                mac = virXMLPropString(cur, "address");
+                xmlStrEqual(cur->name, BAD_CAST element)) {
+                value = virXMLPropString(cur, attribute);
 
-                if (STRCASEEQ(mac, iface)) {
-                    VIR_FREE(mac);
+                if (STRCASEEQ(value, iface)) {
+                    VIR_FREE(value);
                     goto hit;
                 }
-                VIR_FREE(mac);
+                VIR_FREE(value);
             }
             cur = cur->next;
         }
     }
 
-    vshError(ctl, _("interface with address '%s' not found"), iface);
+    vshError(ctl, _("interface (%s: %s) not found"), element, iface);
     goto cleanup;
 
 hit:
Index: libvirt/tools/virsh.pod
===================================================================
--- libvirt.orig/tools/virsh.pod
+++ libvirt/tools/virsh.pod
@@ -469,11 +469,12 @@ B<Explanation of fields> (fields appear 
 
 Get network interface stats for a running domain.
 
-=item B<domif-setlink> I<domain> I<interface-MAC> I<state> I<--persistent>
+=item B<domif-setlink> I<domain> I<interface-device> I<state> I<--persistent>
 
 Modify link state of the domain's virtual interface. Possible values for
 state are "up" and "down. If --persistent is specified, only the persistent
 configuration of the domain is modified.
+I<interface-device> can be the interface's target name or the MAC address.
 
 =item B<domif-getlink> I<domain> I<interface-device> I<--persistent>