vxlan: convert vxlan to a plugin

per https://jira.fd.io/browse/VPP-2058

Type: improvement

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: Ica0828de218d25ada2d0d1491e373c3b78179ac1

1 files changed, 0 insertions, 540 deletions

diff --git a/src/vnet/vxlan/encap.c b/src/vnet/vxlan/encap.c
deleted file mode 100644
index 0961a27942d..00000000000
--- a/src/vnet/vxlan/encap.c
+++ /dev/null
@@ -1,540 +0,0 @@
-
-/*
- * Copyright (c) 2015 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/vxlan.h>
-#include <vnet/qos/qos_types.h>
-#include <vnet/adj/rewrite.h>
-
-/* Statistics (not all errors) */
-#define foreach_vxlan_encap_error    \
-_(ENCAPSULATED, "good packets encapsulated")
-
-static char *vxlan_encap_error_strings[] = {
-#define _(sym,string) string,
-  foreach_vxlan_encap_error
-#undef _
-};
-
-typedef enum
-{
-#define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
-  foreach_vxlan_encap_error
-#undef _
-    VXLAN_ENCAP_N_ERROR,
-} vxlan_encap_error_t;
-
-typedef enum
-{
-  VXLAN_ENCAP_NEXT_DROP,
-  VXLAN_ENCAP_N_NEXT,
-} vxlan_encap_next_t;
-
-typedef struct
-{
-  u32 tunnel_index;
-  u32 vni;
-} vxlan_encap_trace_t;
-
-#ifndef CLIB_MARCH_VARIANT
-u8 *
-format_vxlan_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_encap_trace_t *t = va_arg (*args, vxlan_encap_trace_t *);
-
-  s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
-	      t->tunnel_index, t->vni);
-  return s;
-}
-#endif
-
-always_inline uword
-vxlan_encap_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
-		    vlib_frame_t *from_frame, u8 is_ip4)
-{
-  u32 n_left_from, next_index, *from, *to_next;
-  vxlan_main_t *vxm = &vxlan_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_tunnel_t *t0 = NULL, *t1 = NULL;
-  index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
-  vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
-  vlib_buffer_t **b = bufs;
-
-  from = vlib_frame_vector_args (from_frame);
-  n_left_from = from_frame->n_vectors;
-
-  next_index = node->cached_next_index;
-
-  STATIC_ASSERT_SIZEOF (ip6_vxlan_header_t, 56);
-  STATIC_ASSERT_SIZEOF (ip4_vxlan_header_t, 36);
-
-  u8 const underlay_hdr_len = is_ip4 ?
-    sizeof (ip4_vxlan_header_t) : sizeof (ip6_vxlan_header_t);
-  u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
-  u32 const outer_packet_csum_offload_flags =
-    is_ip4 ? (VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
-	      VNET_BUFFER_OFFLOAD_F_TNL_VXLAN) :
-	     (VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM |
-	      VNET_BUFFER_OFFLOAD_F_TNL_VXLAN);
-
-  vlib_get_buffers (vm, from, bufs, n_left_from);
-
-  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_prefetch_buffer_header (b[2], LOAD);
-	    vlib_prefetch_buffer_header (b[3], 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;
-
-	  vlib_buffer_t *b0 = b[0];
-	  vlib_buffer_t *b1 = b[1];
-	  b += 2;
-
-	  u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
-	  u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
-
-	  /* Get next node index and adj index from tunnel next_dpo */
-	  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);
-	      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 (b1)->sw_if_index[VLIB_TX])
-	    {
-	      if (sw_if_index0 == vnet_buffer (b1)->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 (b1)->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 (b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
-	  vnet_buffer (b1)->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 (b0),
-				    vlib_buffer_get_current (b1),
-				    underlay_hdr_len);
-
-	  vlib_buffer_advance (b0, -underlay_hdr_len);
-	  vlib_buffer_advance (b1, -underlay_hdr_len);
-
-	  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
-	  u32 len1 = vlib_buffer_length_in_chain (vm, b1);
-	  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 (b0);
-	  void *underlay1 = vlib_buffer_get_current (b1);
-
-	  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;
-	  u8 *l3_0, *l3_1;
-	  if (is_ip4)
-	    {
-	      ip4_vxlan_header_t *hdr0 = underlay0;
-	      ip4_vxlan_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 (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
-		{
-		  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
-		  ip4_0->tos = ip4_0_tos;
-		}
-	      if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
-		{
-		  ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
-		  ip4_1->tos = ip4_1_tos;
-		}
-
-	      l3_0 = (u8 *) ip4_0;
-	      l3_1 = (u8 *) ip4_1;
-	      udp0 = &hdr0->udp;
-	      udp1 = &hdr1->udp;
-	    }
-	  else			/* ipv6 */
-	    {
-	      ip6_vxlan_header_t *hdr0 = underlay0;
-	      ip6_vxlan_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;
-	    }
-
-	  /* 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;
-
-	  if (b0->flags & VNET_BUFFER_F_OFFLOAD)
-	    {
-	      vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
-	      vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
-	      vnet_buffer_offload_flags_set (b0,
-					     outer_packet_csum_offload_flags);
-	    }
-	  /* IPv4 checksum only */
-	  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, b0, ip6_0, &bogus);
-	      ASSERT (bogus == 0);
-	      if (udp0->checksum == 0)
-		udp0->checksum = 0xffff;
-	    }
-
-	  if (b1->flags & VNET_BUFFER_F_OFFLOAD)
-	    {
-	      vnet_buffer2 (b1)->outer_l3_hdr_offset = l3_1 - b1->data;
-	      vnet_buffer2 (b1)->outer_l4_hdr_offset = (u8 *) udp1 - b1->data;
-	      vnet_buffer_offload_flags_set (b1,
-					     outer_packet_csum_offload_flags);
-	    }
-	  /* IPv4 checksum only */
-	  else if (is_ip4)
-	    {
-	      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;
-
-	      udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
-		(vm, b1, ip6_1, &bogus);
-	      ASSERT (bogus == 0);
-	      if (udp1->checksum == 0)
-		udp1->checksum = 0xffff;
-	    }
-
-	  /* save inner packet flow_hash for load-balance node */
-	  vnet_buffer (b0)->ip.flow_hash = flow_hash0;
-	  vnet_buffer (b1)->ip.flow_hash = flow_hash1;
-
-	  if (sw_if_index0 == sw_if_index1)
-	    {
-	      vlib_increment_combined_counter (tx_counter, thread_index,
-					       sw_if_index0, 2, len0 + len1);
-	    }
-	  else
-	    {
-	      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 (b0->flags & VLIB_BUFFER_IS_TRACED))
-	    {
-	      vxlan_encap_trace_t *tr =
-		vlib_add_trace (vm, node, b0, sizeof (*tr));
-	      tr->tunnel_index = t0 - vxm->tunnels;
-	      tr->vni = t0->vni;
-	    }
-
-	  if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
-	    {
-	      vxlan_encap_trace_t *tr =
-		vlib_add_trace (vm, node, b1, sizeof (*tr));
-	      tr->tunnel_index = t1 - vxm->tunnels;
-	      tr->vni = t1->vni;
-	    }
-
-	  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;
-
-	  vlib_buffer_t *b0 = b[0];
-	  b += 1;
-
-	  u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
-
-	  /* Get next node index and adj index from tunnel next_dpo */
-	  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);
-	      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 (b0)->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 (b0),
-				   underlay_hdr_len);
-
-	  vlib_buffer_advance (b0, -underlay_hdr_len);
-	  void *underlay0 = vlib_buffer_get_current (b0);
-
-	  u32 len0 = vlib_buffer_length_in_chain (vm, b0);
-	  u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
-
-	  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_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 (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
-		{
-		  ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
-		  ip4_0->tos = ip4_0_tos;
-		}
-
-	      l3_0 = (u8 *) ip4_0;
-	      udp0 = &hdr->udp;
-	    }
-	  else			/* ip6 path */
-	    {
-	      ip6_vxlan_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;
-	    }
-
-	  /* Fix UDP length  and set source port */
-	  udp0->length = payload_l0;
-	  udp0->src_port = flow_hash0;
-
-	  if (b0->flags & VNET_BUFFER_F_OFFLOAD)
-	    {
-	      vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
-	      vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
-	      vnet_buffer_offload_flags_set (b0,
-					     outer_packet_csum_offload_flags);
-	    }
-	  /* IPv4 checksum only */
-	  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, b0, ip6_0, &bogus);
-	      ASSERT (bogus == 0);
-	      if (udp0->checksum == 0)
-		udp0->checksum = 0xffff;
-	    }
-
-	  /* reuse inner packet flow_hash for load-balance node */
-	  vnet_buffer (b0)->ip.flow_hash = flow_hash0;
-
-	  vlib_increment_combined_counter (tx_counter, thread_index,
-					   sw_if_index0, 1, len0);
-	  pkts_encapsulated++;
-
-	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
-	    {
-	      vxlan_encap_trace_t *tr =
-		vlib_add_trace (vm, node, b0, sizeof (*tr));
-	      tr->tunnel_index = t0 - vxm->tunnels;
-	      tr->vni = t0->vni;
-	    }
-	  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_ENCAP_ERROR_ENCAPSULATED,
-			       pkts_encapsulated);
-
-  return from_frame->n_vectors;
-}
-
-VLIB_NODE_FN (vxlan4_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_encap_inline (vm, node, from_frame, /* is_ip4 */ 1);
-}
-
-VLIB_NODE_FN (vxlan6_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_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vxlan4_encap_node) = {
-  .name = "vxlan4-encap",
-  .vector_size = sizeof (u32),
-  .format_trace = format_vxlan_encap_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
-  .error_strings = vxlan_encap_error_strings,
-  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
-  .next_nodes = {
-        [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
-  },
-};
-
-VLIB_REGISTER_NODE (vxlan6_encap_node) = {
-  .name = "vxlan6-encap",
-  .vector_size = sizeof (u32),
-  .format_trace = format_vxlan_encap_trace,
-  .type = VLIB_NODE_TYPE_INTERNAL,
-  .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
-  .error_strings = vxlan_encap_error_strings,
-  .n_next_nodes = VXLAN_ENCAP_N_NEXT,
-  .next_nodes = {
-        [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
-  },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */