+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0 = from[0];
+ u32 bi1 = from[1];
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t *b1 = vlib_get_buffer (vm, bi1);
+
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi0 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ gt0 = &gm->tunnels[hi0->dev_instance];
+ adj_index0 = gt0->l2_adj_index;
+ }
+
+ if (sw_if_index1 != vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ if (sw_if_index0 == vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index1 = sw_if_index0;
+ gt1 = gt0;
+ adj_index1 = adj_index0;
+ }
+ else
+ {
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi1 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index1);
+ gt1 = &gm->tunnels[hi1->dev_instance];
+ adj_index1 = gt1->l2_adj_index;
+ }
+ }
+
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = adj_index0;
+ vnet_buffer (b1)->ip.adj_index[VLIB_TX] = adj_index1;
+
+ if (PREDICT_FALSE (gt0->type == GRE_TUNNEL_TYPE_ERSPAN))
+ {
+ /* Encap GRE seq# and ERSPAN type II header */
+ vlib_buffer_advance (b0, -sizeof (erspan_t2_t));
+ erspan_t2_t *h0 = vlib_buffer_get_current (b0);
+ u32 seq_num = clib_atomic_fetch_add (>0->gre_sn->seq_num, 1);
+ u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
+ h0->seq_num = clib_host_to_net_u32 (seq_num);
+ h0->t2_u64 = hdr;
+ h0->t2.cos_en_t_session |=
+ clib_host_to_net_u16 (gt0->session_id);
+ }
+ if (PREDICT_FALSE (gt1->type == GRE_TUNNEL_TYPE_ERSPAN))
+ {
+ /* Encap GRE seq# and ERSPAN type II header */
+ vlib_buffer_advance (b1, -sizeof (erspan_t2_t));
+ erspan_t2_t *h1 = vlib_buffer_get_current (b1);
+ u32 seq_num = clib_atomic_fetch_add (>1->gre_sn->seq_num, 1);
+ u64 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
+ h1->seq_num = clib_host_to_net_u32 (seq_num);
+ h1->t2_u64 = hdr;
+ h1->t2.cos_en_t_session |=
+ clib_host_to_net_u16 (gt1->session_id);
+ }
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gre_tx_trace_t *tr0 = vlib_add_trace (vm, node,
+ b0, sizeof (*tr0));
+ tr0->tunnel_id = gt0 - gm->tunnels;
+ tr0->src = gt0->tunnel_src;
+ tr0->dst = gt0->tunnel_dst.fp_addr;
+ tr0->length = vlib_buffer_length_in_chain (vm, b0);
+ }
+ if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ gre_tx_trace_t *tr1 = vlib_add_trace (vm, node,
+ b1, sizeof (*tr1));
+ tr1->tunnel_id = gt1 - gm->tunnels;
+ tr1->src = gt1->tunnel_src;
+ tr1->dst = gt1->tunnel_dst.fp_addr;
+ tr1->length = vlib_buffer_length_in_chain (vm, b1);
+ }
+ }