datapath: Add support for VXLAN tunnels to Open vSwitch

[sliver-openvswitch.git] / lib / netdev-vport.c

diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index 5171171..1863d82 100644 (file)
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -49,6 +49,9 @@
 
 VLOG_DEFINE_THIS_MODULE(netdev_vport);
 
+/* Default to the OTV port, per the VXLAN IETF draft. */
+#define VXLAN_DST_PORT 8472
+
 struct netdev_dev_vport {
     struct netdev_dev netdev_dev;
     struct ofpbuf *options;
@@ -173,6 +176,9 @@ netdev_vport_get_netdev_type(const struct dpif_linux_vport *vport)
     case OVS_VPORT_TYPE_CAPWAP:
         return "capwap";
 
+    case OVS_VPORT_TYPE_VXLAN:
+        return ("vxlan");
+
     case OVS_VPORT_TYPE_FT_GRE:
     case __OVS_VPORT_TYPE_MAX:
         break;
@@ -585,6 +591,8 @@ parse_tunnel_config(const char *name, const char *type,
 {
     bool is_gre = false;
     bool is_ipsec = false;
+    bool needs_dst_port = false;
+    bool found_dst_port = false;
     struct smap_node *node;
     bool ipsec_mech_set = false;
     ovs_be32 daddr = htonl(0);
@@ -602,6 +610,8 @@ parse_tunnel_config(const char *name, const char *type,
         is_gre = true;
         is_ipsec = true;
         flags |= TNL_F_IPSEC;
+    } else if (!strcmp(type, "vxlan")) {
+        needs_dst_port = true;
     }
 
     SMAP_FOR_EACH (node, args) {
@@ -638,6 +648,10 @@ parse_tunnel_config(const char *name, const char *type,
             } else {
                 nl_msg_put_u8(options, OVS_TUNNEL_ATTR_TTL, atoi(node->value));
             }
+        } else if (!strcmp(node->key, "dst_port") && needs_dst_port) {
+            nl_msg_put_u16(options, OVS_TUNNEL_ATTR_DST_PORT,
+                           atoi(node->value));
+            found_dst_port = true;
         } else if (!strcmp(node->key, "csum") && is_gre) {
             if (!strcmp(node->value, "true")) {
                 flags |= TNL_F_CSUM;
@@ -694,6 +708,11 @@ parse_tunnel_config(const char *name, const char *type,
         }
     }
 
+    /* Add a default destination port for VXLAN if none specified. */
+    if (needs_dst_port && !found_dst_port) {
+        nl_msg_put_u16(options, OVS_TUNNEL_ATTR_DST_PORT, VXLAN_DST_PORT);
+    }
+
     if (is_ipsec) {
         static pid_t pid = 0;
         if (pid <= 0) {
@@ -756,6 +775,7 @@ tnl_port_config_from_nlattr(const struct nlattr *options, size_t options_len,
         [OVS_TUNNEL_ATTR_OUT_KEY] = { .type = NL_A_BE64, .optional = true },
         [OVS_TUNNEL_ATTR_TOS] = { .type = NL_A_U8, .optional = true },
         [OVS_TUNNEL_ATTR_TTL] = { .type = NL_A_U8, .optional = true },
+        [OVS_TUNNEL_ATTR_DST_PORT] = { .type = NL_A_U16, .optional = true },
     };
     struct ofpbuf buf;
 
@@ -835,6 +855,13 @@ unparse_tunnel_config(const char *name OVS_UNUSED, const char *type OVS_UNUSED,
         smap_add_format(args, "tos", "0x%x", tos);
     }
 
+    if (a[OVS_TUNNEL_ATTR_DST_PORT]) {
+        uint16_t dst_port = nl_attr_get_u16(a[OVS_TUNNEL_ATTR_DST_PORT]);
+        if (dst_port != VXLAN_DST_PORT) {
+            smap_add_format(args, "dst_port", "%d", dst_port);
+        }
+    }
+
     if (flags & TNL_F_CSUM) {
         smap_add(args, "csum", "true");
     }
@@ -990,6 +1017,10 @@ netdev_vport_register(void)
           { "capwap", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
           parse_tunnel_config, unparse_tunnel_config },
 
+        { OVS_VPORT_TYPE_VXLAN,
+          { "vxlan", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
+          parse_tunnel_config, unparse_tunnel_config },
+
         { OVS_VPORT_TYPE_PATCH,
           { "patch", VPORT_FUNCTIONS(NULL) },
           parse_patch_config, unparse_patch_config }