+ switch (type) {
+ case OVS_TUNNEL_KEY_ATTR_ID: return 8;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: return 4;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_DST: return 4;
+ case OVS_TUNNEL_KEY_ATTR_TOS: return 1;
+ case OVS_TUNNEL_KEY_ATTR_TTL: return 1;
+ case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: return 0;
+ case OVS_TUNNEL_KEY_ATTR_CSUM: return 0;
+ case __OVS_TUNNEL_KEY_ATTR_MAX:
+ return -1;
+ }
+ return -1;
+}
+
+static enum odp_key_fitness
+tun_key_from_attr(const struct nlattr *attr, struct flow_tnl *tun)
+{
+ unsigned int left;
+ const struct nlattr *a;
+ bool ttl = false;
+ bool unknown = false;
+
+ NL_NESTED_FOR_EACH(a, left, attr) {
+ uint16_t type = nl_attr_type(a);
+ size_t len = nl_attr_get_size(a);
+ int expected_len = tunnel_key_attr_len(type);
+
+ if (len != expected_len && expected_len >= 0) {
+ return ODP_FIT_ERROR;
+ }
+
+ switch (type) {
+ case OVS_TUNNEL_KEY_ATTR_ID:
+ tun->tun_id = nl_attr_get_be64(a);
+ tun->flags |= FLOW_TNL_F_KEY;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
+ tun->ip_src = nl_attr_get_be32(a);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
+ tun->ip_dst = nl_attr_get_be32(a);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TOS:
+ tun->ip_tos = nl_attr_get_u8(a);
+ break;
+ case OVS_TUNNEL_KEY_ATTR_TTL:
+ tun->ip_ttl = nl_attr_get_u8(a);
+ ttl = true;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
+ tun->flags |= FLOW_TNL_F_DONT_FRAGMENT;
+ break;
+ case OVS_TUNNEL_KEY_ATTR_CSUM:
+ tun->flags |= FLOW_TNL_F_CSUM;
+ break;
+ default:
+ /* Allow this to show up as unexpected, if there are unknown
+ * tunnel attribute, eventually resulting in ODP_FIT_TOO_MUCH. */
+ unknown = true;
+ break;
+ }