summaryrefslogtreecommitdiffstats
path: root/src/vnet/ethernet/p2p_ethernet_input.c
blob: 3d81e99cff2db0891766758f0b036dca3fe47da2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/*
 * 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;
}

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",
  },
};

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