misc: deprecate gbp and its dependents

Type: improvement

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Benoît Ganne <bganne@cisco.com>
Change-Id: I2f30a4f04fd9a8635ce2d259b5fd5b0c85cee8c3

1 files changed, 601 insertions, 0 deletions

diff --git a/extras/deprecated/vnet/vxlan-gbp/encap.c b/extras/deprecated/vnet/vxlan-gbp/encap.c
new file mode 100644
index 00000000000..2a4e8a8e312
--- /dev/null
+++ b/extras/deprecated/vnet/vxlan-gbp/encap.c
@@ -0,0 +1,601 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/interface_output.h>
+#include <vnet/vxlan-gbp/vxlan_gbp.h>
+#include <vnet/qos/qos_types.h>
+#include <vnet/adj/rewrite.h>
+
+/* Statistics (not all errors) */
+#define foreach_vxlan_gbp_encap_error    \
+_(ENCAPSULATED, "good packets encapsulated")
+
+static char *vxlan_gbp_encap_error_strings[] = {
+#define _(sym,string) string,
+  foreach_vxlan_gbp_encap_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) VXLAN_GBP_ENCAP_ERROR_##sym,
+  foreach_vxlan_gbp_encap_error
+#undef _
+    VXLAN_GBP_ENCAP_N_ERROR,
+} vxlan_gbp_encap_error_t;
+
+typedef enum
+{
+  VXLAN_GBP_ENCAP_NEXT_DROP,
+  VXLAN_GBP_ENCAP_N_NEXT,
+} vxlan_gbp_encap_next_t;
+
+typedef struct
+{
+  u32 tunnel_index;
+  u32 vni;
+  u16 sclass;
+  u8 flags;
+} vxlan_gbp_encap_trace_t;
+
+#ifndef CLIB_MARCH_VARIANT
+u8 *
+format_vxlan_gbp_encap_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  vxlan_gbp_encap_trace_t *t = va_arg (*args, vxlan_gbp_encap_trace_t *);
+
+  s =
+    format (s,
+	    "VXLAN_GBP encap to vxlan_gbp_tunnel%d vni %d sclass %d flags %U",
+	    t->tunnel_index, t->vni, t->sclass,
+	    format_vxlan_gbp_header_gpflags, t->flags);
+  return s;
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+always_inline uword
+vxlan_gbp_encap_inline (vlib_main_t * vm,
+			vlib_node_runtime_t * node,
+			vlib_frame_t * from_frame, u8 is_ip4, u8 csum_offload)
+{
+  u32 n_left_from, next_index, *from, *to_next;
+  vxlan_gbp_main_t *vxm = &vxlan_gbp_main;
+  vnet_main_t *vnm = vxm->vnet_main;
+  vnet_interface_main_t *im = &vnm->interface_main;
+  vlib_combined_counter_main_t *tx_counter =
+    im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
+  u32 pkts_encapsulated = 0;
+  u32 thread_index = vlib_get_thread_index ();
+  u32 sw_if_index0 = 0, sw_if_index1 = 0;
+  u32 next0 = 0, next1 = 0;
+  vxlan_gbp_tunnel_t *t0 = NULL, *t1 = NULL;
+  index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
+  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  vlib_get_buffers (vm, from, bufs, n_left_from);
+
+  next_index = node->cached_next_index;
+
+  STATIC_ASSERT_SIZEOF (ip6_vxlan_gbp_header_t, 56);
+  STATIC_ASSERT_SIZEOF (ip4_vxlan_gbp_header_t, 36);
+
+  u8 const underlay_hdr_len = is_ip4 ?
+    sizeof (ip4_vxlan_gbp_header_t) : sizeof (ip6_vxlan_gbp_header_t);
+  u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
+  u32 const csum_flags =
+    is_ip4 ? VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+	       VNET_BUFFER_F_L4_HDR_OFFSET_VALID :
+	     VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+	       VNET_BUFFER_F_L4_HDR_OFFSET_VALID;
+  u32 const outer_packet_csum_offload_flags =
+    is_ip4 ? VNET_BUFFER_OFFLOAD_F_IP_CKSUM | VNET_BUFFER_OFFLOAD_F_UDP_CKSUM :
+	     VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
+  u32 const inner_packet_removed_flags =
+    VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_IS_IP6 |
+    VNET_BUFFER_F_L2_HDR_OFFSET_VALID | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+    VNET_BUFFER_F_L4_HDR_OFFSET_VALID;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from >= 4 && n_left_to_next >= 2)
+	{
+	  /* Prefetch next iteration. */
+	  {
+	    vlib_buffer_t *p2, *p3;
+
+	    p2 = vlib_get_buffer (vm, from[2]);
+	    p3 = vlib_get_buffer (vm, from[3]);
+
+	    vlib_prefetch_buffer_header (p2, LOAD);
+	    vlib_prefetch_buffer_header (p3, LOAD);
+
+	    CLIB_PREFETCH (b[2]->data - CLIB_CACHE_LINE_BYTES,
+			   2 * CLIB_CACHE_LINE_BYTES, LOAD);
+	    CLIB_PREFETCH (b[3]->data - CLIB_CACHE_LINE_BYTES,
+			   2 * CLIB_CACHE_LINE_BYTES, LOAD);
+	  }
+
+	  u32 bi0 = to_next[0] = from[0];
+	  u32 bi1 = to_next[1] = from[1];
+	  from += 2;
+	  to_next += 2;
+	  n_left_to_next -= 2;
+	  n_left_from -= 2;
+
+	  u32 or_flags = b[0]->flags | b[1]->flags;
+	  if (csum_offload && (or_flags & VNET_BUFFER_F_OFFLOAD))
+	    {
+	      /* Only calculate the non-GSO packet csum offload */
+	      if ((b[0]->flags & VNET_BUFFER_F_GSO) == 0)
+		{
+		  vnet_calc_checksums_inline (vm, b[0],
+					      b[0]->flags &
+					      VNET_BUFFER_F_IS_IP4,
+					      b[0]->flags &
+					      VNET_BUFFER_F_IS_IP6);
+		  b[0]->flags &= ~inner_packet_removed_flags;
+		}
+	      if ((b[1]->flags & VNET_BUFFER_F_GSO) == 0)
+		{
+		  vnet_calc_checksums_inline (vm, b[1],
+					      b[1]->flags &
+					      VNET_BUFFER_F_IS_IP4,
+					      b[1]->flags &
+					      VNET_BUFFER_F_IS_IP6);
+		  b[1]->flags &= ~inner_packet_removed_flags;
+		}
+	    }
+
+	  u32 flow_hash0 = vnet_l2_compute_flow_hash (b[0]);
+	  u32 flow_hash1 = vnet_l2_compute_flow_hash (b[1]);
+
+	  /* Get next node index and adj index from tunnel next_dpo */
+	  if (sw_if_index0 != vnet_buffer (b[0])->sw_if_index[VLIB_TX])
+	    {
+	      sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
+	      vnet_hw_interface_t *hi0 =
+		vnet_get_sup_hw_interface (vnm, sw_if_index0);
+	      t0 = &vxm->tunnels[hi0->dev_instance];
+	      /* Note: change to always set next0 if it may set to drop */
+	      next0 = t0->next_dpo.dpoi_next_node;
+	      dpoi_idx0 = t0->next_dpo.dpoi_index;
+	    }
+
+	  /* Get next node index and adj index from tunnel next_dpo */
+	  if (sw_if_index1 != vnet_buffer (b[1])->sw_if_index[VLIB_TX])
+	    {
+	      if (sw_if_index0 == vnet_buffer (b[1])->sw_if_index[VLIB_TX])
+		{
+		  sw_if_index1 = sw_if_index0;
+		  t1 = t0;
+		  next1 = next0;
+		  dpoi_idx1 = dpoi_idx0;
+		}
+	      else
+		{
+		  sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
+		  vnet_hw_interface_t *hi1 =
+		    vnet_get_sup_hw_interface (vnm, sw_if_index1);
+		  t1 = &vxm->tunnels[hi1->dev_instance];
+		  /* Note: change to always set next1 if it may set to drop */
+		  next1 = t1->next_dpo.dpoi_next_node;
+		  dpoi_idx1 = t1->next_dpo.dpoi_index;
+		}
+	    }
+
+	  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpoi_idx0;
+	  vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpoi_idx1;
+
+	  ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
+	  ASSERT (t1->rewrite_header.data_bytes == underlay_hdr_len);
+	  vnet_rewrite_two_headers (*t0, *t1, vlib_buffer_get_current (b[0]),
+				    vlib_buffer_get_current (b[1]),
+				    underlay_hdr_len);
+
+	  vlib_buffer_advance (b[0], -underlay_hdr_len);
+	  vlib_buffer_advance (b[1], -underlay_hdr_len);
+
+	  u32 len0 = vlib_buffer_length_in_chain (vm, b[0]);
+	  u32 len1 = vlib_buffer_length_in_chain (vm, b[1]);
+	  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+	  u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
+
+	  void *underlay0 = vlib_buffer_get_current (b[0]);
+	  void *underlay1 = vlib_buffer_get_current (b[1]);
+
+	  ip4_header_t *ip4_0, *ip4_1;
+	  qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
+	  ip6_header_t *ip6_0, *ip6_1;
+	  udp_header_t *udp0, *udp1;
+	  vxlan_gbp_header_t *vxlan_gbp0, *vxlan_gbp1;
+	  u8 *l3_0, *l3_1;
+	  if (is_ip4)
+	    {
+	      ip4_vxlan_gbp_header_t *hdr0 = underlay0;
+	      ip4_vxlan_gbp_header_t *hdr1 = underlay1;
+
+	      /* Fix the IP4 checksum and length */
+	      ip4_0 = &hdr0->ip4;
+	      ip4_1 = &hdr1->ip4;
+	      ip4_0->length = clib_host_to_net_u16 (len0);
+	      ip4_1->length = clib_host_to_net_u16 (len1);
+
+	      if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+		{
+		  ip4_0_tos = vnet_buffer2 (b[0])->qos.bits;
+		  ip4_0->tos = ip4_0_tos;
+		}
+	      if (PREDICT_FALSE (b[1]->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+		{
+		  ip4_1_tos = vnet_buffer2 (b[1])->qos.bits;
+		  ip4_1->tos = ip4_1_tos;
+		}
+
+	      l3_0 = (u8 *) ip4_0;
+	      l3_1 = (u8 *) ip4_1;
+	      udp0 = &hdr0->udp;
+	      udp1 = &hdr1->udp;
+	      vxlan_gbp0 = &hdr0->vxlan_gbp;
+	      vxlan_gbp1 = &hdr1->vxlan_gbp;
+	    }
+	  else			/* ipv6 */
+	    {
+	      ip6_vxlan_gbp_header_t *hdr0 = underlay0;
+	      ip6_vxlan_gbp_header_t *hdr1 = underlay1;
+
+	      /* Fix IP6 payload length */
+	      ip6_0 = &hdr0->ip6;
+	      ip6_1 = &hdr1->ip6;
+	      ip6_0->payload_length = payload_l0;
+	      ip6_1->payload_length = payload_l1;
+
+	      l3_0 = (u8 *) ip6_0;
+	      l3_1 = (u8 *) ip6_1;
+	      udp0 = &hdr0->udp;
+	      udp1 = &hdr1->udp;
+	      vxlan_gbp0 = &hdr0->vxlan_gbp;
+	      vxlan_gbp1 = &hdr1->vxlan_gbp;
+	    }
+
+	  /* Fix UDP length  and set source port */
+	  udp0->length = payload_l0;
+	  udp0->src_port = flow_hash0;
+	  udp1->length = payload_l1;
+	  udp1->src_port = flow_hash1;
+
+	  /* set source class and gpflags */
+	  vxlan_gbp0->gpflags = vnet_buffer2 (b[0])->gbp.flags;
+	  vxlan_gbp1->gpflags = vnet_buffer2 (b[1])->gbp.flags;
+	  vxlan_gbp0->sclass =
+	    clib_host_to_net_u16 (vnet_buffer2 (b[0])->gbp.sclass);
+	  vxlan_gbp1->sclass =
+	    clib_host_to_net_u16 (vnet_buffer2 (b[1])->gbp.sclass);
+
+	  if (csum_offload)
+	    {
+	      b[0]->flags |= csum_flags;
+	      vnet_buffer (b[0])->l3_hdr_offset = l3_0 - b[0]->data;
+	      vnet_buffer (b[0])->l4_hdr_offset = (u8 *) udp0 - b[0]->data;
+	      vnet_buffer_offload_flags_set (b[0],
+					     outer_packet_csum_offload_flags);
+	      b[1]->flags |= csum_flags;
+	      vnet_buffer (b[1])->l3_hdr_offset = l3_1 - b[1]->data;
+	      vnet_buffer (b[1])->l4_hdr_offset = (u8 *) udp1 - b[1]->data;
+	      vnet_buffer_offload_flags_set (b[1],
+					     outer_packet_csum_offload_flags);
+	    }
+	  /* IPv4 UDP checksum only if checksum offload is used */
+	  else if (is_ip4)
+	    {
+	      ip_csum_t sum0 = ip4_0->checksum;
+	      sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+				     length /* changed member */ );
+	      if (PREDICT_FALSE (ip4_0_tos))
+		{
+		  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+					 tos /* changed member */ );
+		}
+	      ip4_0->checksum = ip_csum_fold (sum0);
+	      ip_csum_t sum1 = ip4_1->checksum;
+	      sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
+				     length /* changed member */ );
+	      if (PREDICT_FALSE (ip4_1_tos))
+		{
+		  sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
+					 tos /* changed member */ );
+		}
+	      ip4_1->checksum = ip_csum_fold (sum1);
+	    }
+	  /* IPv6 UDP checksum is mandatory */
+	  else
+	    {
+	      int bogus = 0;
+
+	      udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
+		(vm, b[0], ip6_0, &bogus);
+	      ASSERT (bogus == 0);
+	      if (udp0->checksum == 0)
+		udp0->checksum = 0xffff;
+	      udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
+		(vm, b[1], ip6_1, &bogus);
+	      ASSERT (bogus == 0);
+	      if (udp1->checksum == 0)
+		udp1->checksum = 0xffff;
+	    }
+
+	  /* save inner packet flow_hash for load-balance node */
+	  vnet_buffer (b[0])->ip.flow_hash = flow_hash0;
+	  vnet_buffer (b[1])->ip.flow_hash = flow_hash1;
+
+	  vlib_increment_combined_counter (tx_counter, thread_index,
+					   sw_if_index0, 1, len0);
+	  vlib_increment_combined_counter (tx_counter, thread_index,
+					   sw_if_index1, 1, len1);
+	  pkts_encapsulated += 2;
+
+	  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      vxlan_gbp_encap_trace_t *tr =
+		vlib_add_trace (vm, node, b[0], sizeof (*tr));
+	      tr->tunnel_index = t0 - vxm->tunnels;
+	      tr->vni = t0->vni;
+	      tr->sclass = vnet_buffer2 (b[0])->gbp.sclass;
+	      tr->flags = vnet_buffer2 (b[0])->gbp.flags;
+	    }
+
+	  if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      vxlan_gbp_encap_trace_t *tr =
+		vlib_add_trace (vm, node, b[1], sizeof (*tr));
+	      tr->tunnel_index = t1 - vxm->tunnels;
+	      tr->vni = t1->vni;
+	      tr->sclass = vnet_buffer2 (b[1])->gbp.sclass;
+	      tr->flags = vnet_buffer2 (b[1])->gbp.flags;
+	    }
+	  b += 2;
+
+	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, bi1, next0, next1);
+	}
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0 = to_next[0] = from[0];
+	  from += 1;
+	  to_next += 1;
+	  n_left_from -= 1;
+	  n_left_to_next -= 1;
+
+	  if (csum_offload && (b[0]->flags & VNET_BUFFER_F_OFFLOAD))
+	    {
+	      /* Only calculate the non-GSO packet csum offload */
+	      if ((b[0]->flags & VNET_BUFFER_F_GSO) == 0)
+		{
+		  vnet_calc_checksums_inline (vm, b[0],
+					      b[0]->flags &
+					      VNET_BUFFER_F_IS_IP4,
+					      b[0]->flags &
+					      VNET_BUFFER_F_IS_IP6);
+		  b[0]->flags &= ~inner_packet_removed_flags;
+		}
+	    }
+
+	  u32 flow_hash0 = vnet_l2_compute_flow_hash (b[0]);
+
+	  /* Get next node index and adj index from tunnel next_dpo */
+	  if (sw_if_index0 != vnet_buffer (b[0])->sw_if_index[VLIB_TX])
+	    {
+	      sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
+	      vnet_hw_interface_t *hi0 =
+		vnet_get_sup_hw_interface (vnm, sw_if_index0);
+	      t0 = &vxm->tunnels[hi0->dev_instance];
+	      /* Note: change to always set next0 if it may be set to drop */
+	      next0 = t0->next_dpo.dpoi_next_node;
+	      dpoi_idx0 = t0->next_dpo.dpoi_index;
+	    }
+	  vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpoi_idx0;
+
+	  ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
+	  vnet_rewrite_one_header (*t0, vlib_buffer_get_current (b[0]),
+				   underlay_hdr_len);
+
+	  vlib_buffer_advance (b[0], -underlay_hdr_len);
+	  void *underlay0 = vlib_buffer_get_current (b[0]);
+
+	  u32 len0 = vlib_buffer_length_in_chain (vm, b[0]);
+	  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+
+	  vxlan_gbp_header_t *vxlan_gbp0;
+	  udp_header_t *udp0;
+	  ip4_header_t *ip4_0;
+	  qos_bits_t ip4_0_tos = 0;
+	  ip6_header_t *ip6_0;
+	  u8 *l3_0;
+	  if (is_ip4)
+	    {
+	      ip4_vxlan_gbp_header_t *hdr = underlay0;
+
+	      /* Fix the IP4 checksum and length */
+	      ip4_0 = &hdr->ip4;
+	      ip4_0->length = clib_host_to_net_u16 (len0);
+
+	      if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+		{
+		  ip4_0_tos = vnet_buffer2 (b[0])->qos.bits;
+		  ip4_0->tos = ip4_0_tos;
+		}
+
+	      l3_0 = (u8 *) ip4_0;
+	      udp0 = &hdr->udp;
+	      vxlan_gbp0 = &hdr->vxlan_gbp;
+	    }
+	  else			/* ip6 path */
+	    {
+	      ip6_vxlan_gbp_header_t *hdr = underlay0;
+
+	      /* Fix IP6 payload length */
+	      ip6_0 = &hdr->ip6;
+	      ip6_0->payload_length = payload_l0;
+
+	      l3_0 = (u8 *) ip6_0;
+	      udp0 = &hdr->udp;
+	      vxlan_gbp0 = &hdr->vxlan_gbp;
+	    }
+
+	  /* Fix UDP length  and set source port */
+	  udp0->length = payload_l0;
+	  udp0->src_port = flow_hash0;
+
+	  /* set source class and gpflags */
+	  vxlan_gbp0->gpflags = vnet_buffer2 (b[0])->gbp.flags;
+	  vxlan_gbp0->sclass =
+	    clib_host_to_net_u16 (vnet_buffer2 (b[0])->gbp.sclass);
+
+	  if (csum_offload)
+	    {
+	      b[0]->flags |= csum_flags;
+	      vnet_buffer (b[0])->l3_hdr_offset = l3_0 - b[0]->data;
+	      vnet_buffer (b[0])->l4_hdr_offset = (u8 *) udp0 - b[0]->data;
+	      vnet_buffer_offload_flags_set (b[0],
+					     outer_packet_csum_offload_flags);
+	    }
+	  /* IPv4 UDP checksum only if checksum offload is used */
+	  else if (is_ip4)
+	    {
+	      ip_csum_t sum0 = ip4_0->checksum;
+	      sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+				     length /* changed member */ );
+	      if (PREDICT_FALSE (ip4_0_tos))
+		{
+		  sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+					 tos /* changed member */ );
+		}
+	      ip4_0->checksum = ip_csum_fold (sum0);
+	    }
+	  /* IPv6 UDP checksum is mandatory */
+	  else
+	    {
+	      int bogus = 0;
+
+	      udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
+		(vm, b[0], ip6_0, &bogus);
+	      ASSERT (bogus == 0);
+	      if (udp0->checksum == 0)
+		udp0->checksum = 0xffff;
+	    }
+
+	  /* save inner packet flow_hash for load-balance node */
+	  vnet_buffer (b[0])->ip.flow_hash = flow_hash0;
+
+	  vlib_increment_combined_counter (tx_counter, thread_index,
+					   sw_if_index0, 1, len0);
+	  pkts_encapsulated++;
+
+	  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      vxlan_gbp_encap_trace_t *tr =
+		vlib_add_trace (vm, node, b[0], sizeof (*tr));
+	      tr->tunnel_index = t0 - vxm->tunnels;
+	      tr->vni = t0->vni;
+	      tr->sclass = vnet_buffer2 (b[0])->gbp.sclass;
+	      tr->flags = vnet_buffer2 (b[0])->gbp.flags;
+	    }
+	  b += 1;
+
+	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+					   to_next, n_left_to_next,
+					   bi0, next0);
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+
+  /* Do we still need this now that tunnel tx stats is kept? */
+  vlib_node_increment_counter (vm, node->node_index,
+			       VXLAN_GBP_ENCAP_ERROR_ENCAPSULATED,
+			       pkts_encapsulated);
+
+  return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (vxlan4_gbp_encap_node) (vlib_main_t * vm,
+				      vlib_node_runtime_t * node,
+				      vlib_frame_t * from_frame)
+{
+  /* Disable chksum offload as setup overhead in tx node is not worthwhile
+     for ip4 header checksum only, unless udp checksum is also required */
+  return vxlan_gbp_encap_inline (vm, node, from_frame, /* is_ip4 */ 1,
+				 /* csum_offload */ 0);
+}
+
+VLIB_NODE_FN (vxlan6_gbp_encap_node) (vlib_main_t * vm,
+				      vlib_node_runtime_t * node,
+				      vlib_frame_t * from_frame)
+{
+  /* Enable checksum offload for ip6 as udp checksum is mandatory, */
+  return vxlan_gbp_encap_inline (vm, node, from_frame, /* is_ip4 */ 0,
+				 /* csum_offload */ 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan4_gbp_encap_node) =
+{
+  .name = "vxlan4-gbp-encap",
+  .vector_size = sizeof (u32),
+  .format_trace = format_vxlan_gbp_encap_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (vxlan_gbp_encap_error_strings),
+  .error_strings = vxlan_gbp_encap_error_strings,
+  .n_next_nodes = VXLAN_GBP_ENCAP_N_NEXT,
+  .next_nodes = {
+    [VXLAN_GBP_ENCAP_NEXT_DROP] = "error-drop",
+  },
+};
+
+VLIB_REGISTER_NODE (vxlan6_gbp_encap_node) =
+{
+  .name = "vxlan6-gbp-encap",
+  .vector_size = sizeof (u32),
+  .format_trace = format_vxlan_gbp_encap_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (vxlan_gbp_encap_error_strings),
+  .error_strings = vxlan_gbp_encap_error_strings,
+  .n_next_nodes = VXLAN_GBP_ENCAP_N_NEXT,
+  .next_nodes = {
+    [VXLAN_GBP_ENCAP_NEXT_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */