xenserver: Send VIF details to controller

The controller needs to know various things about virtual interfaces as
they move about the network.  This commit sends the VIF, virtual
machine, and network UUIDs associated with the VIF, as well as its MAC
address over the management channel.

Feature #1324

1 files changed, 43 insertions, 0 deletions

diff --git a/vswitchd/mgmt.c b/vswitchd/mgmt.c
index b31d141e..90f3ecb6 100644
--- a/vswitchd/mgmt.c
+++ b/vswitchd/mgmt.c
@@ -306,6 +306,7 @@ send_resources_update(uint32_t xid, bool use_xid)
     struct ofmp_resources_update *ofmpru;
     struct ofmp_tlv *tlv;
     struct svec br_list;
+    struct svec port_list;
     const char *host_uuid;
     int i;
 
@@ -381,6 +382,48 @@ send_resources_update(uint32_t xid, bool use_xid)
         }
     }
 
+    /* On XenServer systems, extended information about virtual interfaces 
+     * (VIFs) is available, which is needed by the controller. 
+     */ 
+    svec_init(&port_list);
+    bridge_get_ifaces(&port_list);
+    for (i=0; i < port_list.n; i++) {
+        const char *vif_uuid, *vm_uuid, *net_uuid;
+        uint64_t vif_mac;
+        struct ofmptsr_vif *vif_tlv;
+
+        vif_uuid = cfg_get_string(0, "port.%s.vif-uuid", port_list.names[i]);
+        if (!vif_uuid) {
+            continue;
+        }
+
+        vif_tlv = ofpbuf_put_zeros(buffer, sizeof(*vif_tlv));
+        vif_tlv->type = htons(OFMPTSR_VIF);
+        vif_tlv->len = htons(sizeof(*vif_tlv));
+
+        memcpy(vif_tlv->name, port_list.names[i], strlen(port_list.names[i])+1);
+        memcpy(vif_tlv->vif_uuid, vif_uuid, sizeof(vif_tlv->vif_uuid));
+
+        vm_uuid = cfg_get_string(0, "port.%s.vm-uuid", port_list.names[i]);
+        if (vm_uuid) {
+            memcpy(vif_tlv->vm_uuid, vm_uuid, sizeof(vif_tlv->vm_uuid));
+        } else {
+            /* In case the vif disappeared underneath us. */
+            memset(vif_tlv->vm_uuid, '\0', sizeof(vif_tlv->vm_uuid));
+        }
+
+        net_uuid = cfg_get_string(0, "port.%s.net-uuid", port_list.names[i]);
+        if (net_uuid) {
+            memcpy(vif_tlv->net_uuid, net_uuid, sizeof(vif_tlv->net_uuid));
+        } else {
+            /* In case the vif disappeared underneath us. */
+            memset(vif_tlv->net_uuid, '\0', sizeof(vif_tlv->net_uuid));
+        }
+
+        vif_mac = cfg_get_mac(0, "port.%s.vif-mac", port_list.names[i]);
+        vif_tlv->vif_mac = htonll(vif_mac);
+    }
+
     /* Put end marker. */
     tlv = ofpbuf_put_zeros(buffer, sizeof(*tlv));
     tlv->type = htons(OFMPTSR_END);