src/vnet/ethernet/p2p_ethernet_input.c - fdio/vpp - Gitiles

 /*
  * node.c: p2p ethernet vpp node
  *
  * Copyright (c) 2016 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 <vlib/vlib.h>
 #include <vnet/vnet.h>
 #include <vppinfra/error.h>

 #include <vnet/ethernet/p2p_ethernet.h>

 #include <vppinfra/error.h>
 #include <vppinfra/elog.h>

 extern vlib_node_registration_t p2p_ethernet_input_node;

 /* packet trace format function */
 static u8 *
 format_p2p_ethernet_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 *);
   p2p_ethernet_trace_t *t = va_arg (*args, p2p_ethernet_trace_t *);

   vnet_main_t *vnm = &vnet_main;
   s = format (s, "P2P ethernet: %U -> %U",
 	      format_vnet_sw_if_index_name, vnm, t->sw_if_index,
 	      format_vnet_sw_if_index_name, vnm, t->p2pe_sw_if_index);

   return s;
 }

 #define foreach_p2p_ethernet_error                      \
 _(HITS, "P2P ethernet incoming packets processed")

 typedef enum
 {
 #define _(sym,str) P2PE_ERROR_##sym,
   foreach_p2p_ethernet_error
 #undef _
     P2PE_N_ERROR,
 } p2p_ethernet_error_t;

 static char *p2p_ethernet_error_strings[] = {
 #define _(sym,string) string,
   foreach_p2p_ethernet_error
 #undef _
 };

 VLIB_NODE_FN (p2p_ethernet_input_node) (vlib_main_t * vm,
 					vlib_node_runtime_t * node,
 					vlib_frame_t * frame)
 {
   u32 thread_index = vm->thread_index;
   u32 n_trace = vlib_get_trace_count (vm, node);
   u32 n_left_from, *from, *to_next;
   u32 next_index;
   u32 n_p2p_ethernet_packets = 0;
   vlib_combined_counter_main_t *cm =
     vnet_get_main ()->interface_main.combined_sw_if_counters;

   from = vlib_frame_vector_args (frame);
   n_left_from = frame->n_vectors;
   next_index = node->cached_next_index;

   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)
 	{
 	  u32 bi0, bi1;
 	  vlib_buffer_t *b0, *b1;
 	  u32 next0 = 0, next1 = 0;
 	  u32 sw_if_index0, sw_if_index1;
 	  ethernet_header_t *en0, *en1;
 	  u32 rx0, rx1;

 	  bi0 = from[0];
 	  bi1 = from[1];
 	  to_next[0] = bi0;
 	  to_next[1] = bi1;
 	  from += 2;
 	  to_next += 2;
 	  n_left_to_next -= 2;
 	  n_left_from -= 2;

 	  b0 = vlib_get_buffer (vm, bi0);
 	  b1 = vlib_get_buffer (vm, bi1);

 	  en0 = vlib_buffer_get_current (b0);
 	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
 	  en1 = vlib_buffer_get_current (b1);
 	  sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];

 	  vnet_feature_next (&next0, b0);
 	  vnet_feature_next (&next1, b1);

 	  rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
 	  rx1 = p2p_ethernet_lookup (sw_if_index1, en1->src_address);

 	  if (rx0 != ~0)
 	    {
 	      /* Send pkt to p2p_ethernet RX interface */
 	      vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
 	      n_p2p_ethernet_packets += 1;

 	      if (PREDICT_FALSE
 		  (n_trace > 0
 		   && vlib_trace_buffer (vm, node, next_index, b0,
 					 1 /* follow_chain */ )))
 		{
 		  p2p_ethernet_trace_t *t0;
 		  vlib_set_trace_count (vm, node, --n_trace);
 		  t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
 		  t0->sw_if_index = sw_if_index0;
 		  t0->p2pe_sw_if_index = rx0;
 		}

 	      vlib_increment_combined_counter (cm, thread_index, rx0, 1,
 					       vlib_buffer_length_in_chain
 					       (vm, b0));
 	    }
 	  if (rx1 != ~0)
 	    {
 	      /* Send pkt to p2p_ethernet RX interface */
 	      vnet_buffer (b1)->sw_if_index[VLIB_RX] = rx1;
 	      n_p2p_ethernet_packets += 1;

 	      if (PREDICT_FALSE
 		  (n_trace > 0
 		   && vlib_trace_buffer (vm, node, next_index, b1,
 					 1 /* follow_chain */ )))
 		{
 		  p2p_ethernet_trace_t *t1;
 		  vlib_set_trace_count (vm, node, --n_trace);
 		  t1 = vlib_add_trace (vm, node, b1, sizeof (*t1));
 		  t1->sw_if_index = sw_if_index1;
 		  t1->p2pe_sw_if_index = rx1;
 		}

 	      vlib_increment_combined_counter (cm, thread_index, rx1, 1,
 					       vlib_buffer_length_in_chain
 					       (vm, b1));
 	    }

 	  /* verify speculative enqueue, maybe switch current next frame */
 	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 					   to_next, n_left_to_next,
 					   bi0, next0);
 	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 					   to_next, n_left_to_next,
 					   bi1, next1);
 	}

       while (n_left_from > 0 && n_left_to_next > 0)
 	{
 	  u32 bi0;
 	  vlib_buffer_t *b0;
 	  u32 next0 = 0;
 	  u32 sw_if_index0;
 	  ethernet_header_t *en0;
 	  u32 rx0;

 	  bi0 = from[0];
 	  to_next[0] = bi0;
 	  from += 1;
 	  to_next += 1;
 	  n_left_from -= 1;
 	  n_left_to_next -= 1;

 	  b0 = vlib_get_buffer (vm, bi0);

 	  en0 = vlib_buffer_get_current (b0);
 	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];

 	  vnet_feature_next (&next0, b0);

 	  rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
 	  if (rx0 != ~0)
 	    {
 	      /* Send pkt to p2p_ethernet RX interface */
 	      vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
 	      n_p2p_ethernet_packets += 1;

 	      if (PREDICT_FALSE
 		  (n_trace > 0
 		   && vlib_trace_buffer (vm, node, next_index, b0,
 					 1 /* follow_chain */ )))
 		{
 		  p2p_ethernet_trace_t *t0;
 		  vlib_set_trace_count (vm, node, --n_trace);
 		  t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
 		  t0->sw_if_index = sw_if_index0;
 		  t0->p2pe_sw_if_index = rx0;
 		}

 	      vlib_increment_combined_counter (cm, thread_index, rx0, 1,
 					       vlib_buffer_length_in_chain
 					       (vm, b0));
 	    }
 	  else
 	    {
 	      if (PREDICT_FALSE (n_trace > 0))
 		{
 		  node->flags |= VLIB_NODE_FLAG_TRACE;
 		}
 	    }

 	  /* verify speculative enqueue, maybe switch current next frame */
 	  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);
     }

   vlib_node_increment_counter (vm, p2p_ethernet_input_node.index,
 			       P2PE_ERROR_HITS, n_p2p_ethernet_packets);

   return frame->n_vectors;
 }

 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (p2p_ethernet_input_node) = {
   .name = "p2p-ethernet-input",
   .vector_size = sizeof (u32),
   .format_trace = format_p2p_ethernet_trace,
   .type = VLIB_NODE_TYPE_INTERNAL,
   .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,

   .n_errors = ARRAY_LEN(p2p_ethernet_error_strings),
   .error_strings = p2p_ethernet_error_strings,

   .n_next_nodes = 1,

   /* edit / add dispositions here */
   .next_nodes = {
     [0] = "error-drop",
   },
 };
 /* *INDENT-ON* */

 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	* node.c: p2p ethernet vpp node
	*
	* Copyright (c) 2016 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 <vlib/vlib.h>
	#include <vnet/vnet.h>
	#include <vppinfra/error.h>

	#include <vnet/ethernet/p2p_ethernet.h>

	#include <vppinfra/error.h>
	#include <vppinfra/elog.h>

	extern vlib_node_registration_t p2p_ethernet_input_node;

	/* packet trace format function */
	static u8 *
	format_p2p_ethernet_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 );
	p2p_ethernet_trace_t t = va_arg (args, p2p_ethernet_trace_t *);

	vnet_main_t *vnm = &vnet_main;
	s = format (s, "P2P ethernet: %U -> %U",
	format_vnet_sw_if_index_name, vnm, t->sw_if_index,
	format_vnet_sw_if_index_name, vnm, t->p2pe_sw_if_index);

	return s;
	}

	#define foreach_p2p_ethernet_error \
	_(HITS, "P2P ethernet incoming packets processed")

	typedef enum
	{
	#define _(sym,str) P2PE_ERROR_##sym,
	foreach_p2p_ethernet_error
	#undef _
	P2PE_N_ERROR,
	} p2p_ethernet_error_t;

	static char *p2p_ethernet_error_strings[] = {
	#define _(sym,string) string,
	foreach_p2p_ethernet_error
	#undef _
	};

	VLIB_NODE_FN (p2p_ethernet_input_node) (vlib_main_t * vm,
	vlib_node_runtime_t * node,
	vlib_frame_t * frame)
	{
	u32 thread_index = vm->thread_index;
	u32 n_trace = vlib_get_trace_count (vm, node);
	u32 n_left_from, from, to_next;
	u32 next_index;
	u32 n_p2p_ethernet_packets = 0;
	vlib_combined_counter_main_t *cm =
	vnet_get_main ()->interface_main.combined_sw_if_counters;

	from = vlib_frame_vector_args (frame);
	n_left_from = frame->n_vectors;
	next_index = node->cached_next_index;

	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)
	{
	u32 bi0, bi1;
	vlib_buffer_t b0, b1;
	u32 next0 = 0, next1 = 0;
	u32 sw_if_index0, sw_if_index1;
	ethernet_header_t en0, en1;
	u32 rx0, rx1;

	bi0 = from[0];
	bi1 = from[1];
	to_next[0] = bi0;
	to_next[1] = bi1;
	from += 2;
	to_next += 2;
	n_left_to_next -= 2;
	n_left_from -= 2;

	b0 = vlib_get_buffer (vm, bi0);
	b1 = vlib_get_buffer (vm, bi1);

	en0 = vlib_buffer_get_current (b0);
	sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	en1 = vlib_buffer_get_current (b1);
	sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];

	vnet_feature_next (&next0, b0);
	vnet_feature_next (&next1, b1);

	rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
	rx1 = p2p_ethernet_lookup (sw_if_index1, en1->src_address);

	if (rx0 != ~0)
	{
	/* Send pkt to p2p_ethernet RX interface */
	vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
	n_p2p_ethernet_packets += 1;

	if (PREDICT_FALSE
	(n_trace > 0
	&& vlib_trace_buffer (vm, node, next_index, b0,
	1 /* follow_chain */ )))
	{
	p2p_ethernet_trace_t *t0;
	vlib_set_trace_count (vm, node, --n_trace);
	t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
	t0->sw_if_index = sw_if_index0;
	t0->p2pe_sw_if_index = rx0;
	}

	vlib_increment_combined_counter (cm, thread_index, rx0, 1,
	vlib_buffer_length_in_chain
	(vm, b0));
	}
	if (rx1 != ~0)
	{
	/* Send pkt to p2p_ethernet RX interface */
	vnet_buffer (b1)->sw_if_index[VLIB_RX] = rx1;
	n_p2p_ethernet_packets += 1;

	if (PREDICT_FALSE
	(n_trace > 0
	&& vlib_trace_buffer (vm, node, next_index, b1,
	1 /* follow_chain */ )))
	{
	p2p_ethernet_trace_t *t1;
	vlib_set_trace_count (vm, node, --n_trace);
	t1 = vlib_add_trace (vm, node, b1, sizeof (*t1));
	t1->sw_if_index = sw_if_index1;
	t1->p2pe_sw_if_index = rx1;
	}

	vlib_increment_combined_counter (cm, thread_index, rx1, 1,
	vlib_buffer_length_in_chain
	(vm, b1));
	}

	/* verify speculative enqueue, maybe switch current next frame */
	vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
	to_next, n_left_to_next,
	bi0, next0);
	vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
	to_next, n_left_to_next,
	bi1, next1);
	}

	while (n_left_from > 0 && n_left_to_next > 0)
	{
	u32 bi0;
	vlib_buffer_t *b0;
	u32 next0 = 0;
	u32 sw_if_index0;
	ethernet_header_t *en0;
	u32 rx0;

	bi0 = from[0];
	to_next[0] = bi0;
	from += 1;
	to_next += 1;
	n_left_from -= 1;
	n_left_to_next -= 1;

	b0 = vlib_get_buffer (vm, bi0);

	en0 = vlib_buffer_get_current (b0);
	sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];

	vnet_feature_next (&next0, b0);

	rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address);
	if (rx0 != ~0)
	{
	/* Send pkt to p2p_ethernet RX interface */
	vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0;
	n_p2p_ethernet_packets += 1;

	if (PREDICT_FALSE
	(n_trace > 0
	&& vlib_trace_buffer (vm, node, next_index, b0,
	1 /* follow_chain */ )))
	{
	p2p_ethernet_trace_t *t0;
	vlib_set_trace_count (vm, node, --n_trace);
	t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
	t0->sw_if_index = sw_if_index0;
	t0->p2pe_sw_if_index = rx0;
	}

	vlib_increment_combined_counter (cm, thread_index, rx0, 1,
	vlib_buffer_length_in_chain
	(vm, b0));
	}
	else
	{
	if (PREDICT_FALSE (n_trace > 0))
	{
	node->flags \|= VLIB_NODE_FLAG_TRACE;
	}
	}

	/* verify speculative enqueue, maybe switch current next frame */
	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);
	}

	vlib_node_increment_counter (vm, p2p_ethernet_input_node.index,
	P2PE_ERROR_HITS, n_p2p_ethernet_packets);

	return frame->n_vectors;
	}

	/* INDENT-OFF */
	VLIB_REGISTER_NODE (p2p_ethernet_input_node) = {
	.name = "p2p-ethernet-input",
	.vector_size = sizeof (u32),
	.format_trace = format_p2p_ethernet_trace,
	.type = VLIB_NODE_TYPE_INTERNAL,
	.flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,

	.n_errors = ARRAY_LEN(p2p_ethernet_error_strings),
	.error_strings = p2p_ethernet_error_strings,

	.n_next_nodes = 1,

	/* edit / add dispositions here */
	.next_nodes = {
	[0] = "error-drop",
	},
	};
	/* INDENT-ON */

	/*
	* fd.io coding-style-patch-verification: ON
	*
	* Local Variables:
	* eval: (c-set-style "gnu")
	* End:
	*/