tap gso: experimental support

[vpp.git] / src / vnet / ip / ip6_forward.c

diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 8e96647..f599392 100644 (file)
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1622,10 +1622,11 @@ ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
 }
 
 always_inline uword
-ip6_rewrite_inline (vlib_main_t * vm,
-                   vlib_node_runtime_t * node,
-                   vlib_frame_t * frame,
-                   int do_counters, int is_midchain, int is_mcast)
+ip6_rewrite_inline_with_gso (vlib_main_t * vm,
+                            vlib_node_runtime_t * node,
+                            vlib_frame_t * frame,
+                            int do_counters, int is_midchain, int is_mcast,
+                            int do_gso)
 {
   ip_lookup_main_t *lm = &ip6_main.lookup_main;
   u32 *from = vlib_frame_vector_args (frame);
@@ -1771,12 +1772,23 @@ ip6_rewrite_inline (vlib_main_t * vm,
            }
 
          /* Check MTU of outgoing interface. */
-         ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
-                        sizeof (ip6_header_t),
+         u16 ip0_len =
+           clib_net_to_host_u16 (ip0->payload_length) +
+           sizeof (ip6_header_t);
+         u16 ip1_len =
+           clib_net_to_host_u16 (ip1->payload_length) +
+           sizeof (ip6_header_t);
+         if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
+           ip0_len = gso_mtu_sz (p0);
+         if (do_gso && (p1->flags & VNET_BUFFER_F_GSO))
+           ip1_len = gso_mtu_sz (p1);
+
+
+
+         ip6_mtu_check (p0, ip0_len,
                         adj0[0].rewrite_header.max_l3_packet_bytes,
                         is_locally_originated0, &next0, &error0);
-         ip6_mtu_check (p1, clib_net_to_host_u16 (ip1->payload_length) +
-                        sizeof (ip6_header_t),
+         ip6_mtu_check (p1, ip1_len,
                         adj1[0].rewrite_header.max_l3_packet_bytes,
                         is_locally_originated1, &next1, &error1);
 
@@ -1915,8 +1927,13 @@ ip6_rewrite_inline (vlib_main_t * vm,
            }
 
          /* Check MTU of outgoing interface. */
-         ip6_mtu_check (p0, clib_net_to_host_u16 (ip0->payload_length) +
-                        sizeof (ip6_header_t),
+         u16 ip0_len =
+           clib_net_to_host_u16 (ip0->payload_length) +
+           sizeof (ip6_header_t);
+         if (do_gso && (p0->flags & VNET_BUFFER_F_GSO))
+           ip0_len = gso_mtu_sz (p0);
+
+         ip6_mtu_check (p0, ip0_len,
                         adj0[0].rewrite_header.max_l3_packet_bytes,
                         is_locally_originated0, &next0, &error0);
 
@@ -1974,6 +1991,23 @@ ip6_rewrite_inline (vlib_main_t * vm,
   return frame->n_vectors;
 }
 
+always_inline uword
+ip6_rewrite_inline (vlib_main_t * vm,
+                   vlib_node_runtime_t * node,
+                   vlib_frame_t * frame,
+                   int do_counters, int is_midchain, int is_mcast)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  if (PREDICT_FALSE (vnm->interface_main.gso_interface_count > 0))
+    return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
+                                       is_midchain, is_mcast,
+                                       1 /* do_gso */ );
+  else
+    return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
+                                       is_midchain, is_mcast,
+                                       0 /* no do_gso */ );
+}
+
 VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
                                 vlib_node_runtime_t * node,
                                 vlib_frame_t * frame)