aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/pg/pg.h
blob: f5b5e5ac358f5f7dfaea19e76e38cc75c2ee586e (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
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
/*
 * 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.
 */
/*
 * pg.h: VLIB packet generator
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_vlib_pg_h
#define included_vlib_pg_h

#include <vlib/vlib.h>		/* for VLIB_N_RX_TX */
#include <vnet/pg/edit.h>
#include <vppinfra/fifo.h>	/* for buffer_fifo */
#include <vppinfra/pcap.h>
#include <vnet/interface.h>
#include <vnet/ethernet/mac_address.h>
#include <vnet/gso/gro.h>

extern vnet_device_class_t pg_dev_class;

struct pg_main_t;
struct pg_stream_t;

typedef struct pg_edit_group_t
{
  /* Edits in this group. */
  pg_edit_t *edits;

  /* Vector of non-fixed edits for this group. */
  pg_edit_t *non_fixed_edits;

  /* Fixed edits for this group. */
  u8 *fixed_packet_data;
  u8 *fixed_packet_data_mask;

  /* Byte offset where packet data begins. */
  u32 start_byte_offset;

  /* Number of packet bytes for this edit group. */
  u32 n_packet_bytes;

  /* Function to perform miscellaneous edits (e.g. set IP checksum, ...). */
  void (*edit_function) (struct pg_main_t * pg,
			 struct pg_stream_t * s,
			 struct pg_edit_group_t * g,
			 u32 * buffers, u32 n_buffers);

  /* Opaque data for edit function's use. */
  uword edit_function_opaque;
} pg_edit_group_t;

/* Packets are made of multiple buffers chained together.
   This struct keeps track of data per-chain index. */
typedef struct
{
  /* Vector of buffer edits for this stream and buffer index. */
  pg_edit_t *edits;

  /* Buffers pre-initialized with fixed buffer data for this stream. */
  u32 *buffer_fifo;

} pg_buffer_index_t;

typedef struct pg_stream_t
{
  /* Stream name. */
  u8 *name;

  u32 flags;

  /* Stream is currently enabled. */
#define PG_STREAM_FLAGS_IS_ENABLED (1 << 0)

  /* Edit groups are created by each protocol level (e.g. ethernet,
     ip4, tcp, ...). */
  pg_edit_group_t *edit_groups;

  pg_edit_type_t packet_size_edit_type;

  /* Min/max packet size. */
  u32 min_packet_bytes, max_packet_bytes;

  /* Vector of non-fixed edits for this stream.
     All fixed edits are performed and placed into fixed_packet_data. */
  pg_edit_t *non_fixed_edits;

  /* Packet data with all fixed edits performed.
     All packets in stream are initialized according with this data.
     Mask specifies which bits of packet data are covered by fixed edits. */
  u8 *fixed_packet_data, *fixed_packet_data_mask;

  /* Size to use for buffers.  0 means use buffers big enough
     for max_packet_bytes. */
  u32 buffer_bytes;

  /* Buffer flags to set in each packet e.g. checksum offload flags */
  u32 buffer_flags;

  /* Last packet length if packet size edit type is increment. */
  u32 last_increment_packet_size;

  /* Index into main interface pool for this stream. */
  u32 pg_if_index;

  /* Interface used to mark packets for this stream.  May be different
     than hw/sw index from pg main interface pool.  They will be
     different if this stream is being used generate buffers as if
     they were received on a non-pg interface.  For example, suppose you
     are trying to test vlan code and you want to generate buffers that
     appear to come from an ethernet interface. */
  u32 sw_if_index[VLIB_N_RX_TX];

  /* Node where stream's buffers get put. */
  u32 node_index;

  /* Worker thread index */
  u32 worker_index;

  /* Output next index to reach output node from stream input node. */
  u32 next_index;

  u32 if_id;

  /* Number of packets currently generated. */
  u64 n_packets_generated;

  /* Stream is disabled when packet limit is reached.
     Zero means no packet limit. */
  u64 n_packets_limit;

  /* Only generate up to n_max_frame per frame. */
  u32 n_max_frame;

  /* Rate for this stream in packets/second.
     Zero means unlimited rate. */
  f64 rate_packets_per_second;

  f64 time_last_generate;

  f64 packet_accumulator;

  pg_buffer_index_t *buffer_indices;

  u8 **replay_packet_templates;
  u64 *replay_packet_timestamps;
  u32 current_replay_packet_index;
} pg_stream_t;

always_inline void
pg_buffer_index_free (pg_buffer_index_t * bi)
{
  vec_free (bi->edits);
  clib_fifo_free (bi->buffer_fifo);
}

always_inline void
pg_edit_group_free (pg_edit_group_t * g)
{
  pg_edit_t *e;
  vec_foreach (e, g->edits) pg_edit_free (e);
  vec_free (g->edits);
  vec_free (g->fixed_packet_data);
  vec_free (g->fixed_packet_data_mask);
}

always_inline void
pg_stream_free (pg_stream_t * s)
{
  int i;
  pg_edit_group_t *g;
  pg_edit_t *e;
  vec_foreach (e, s->non_fixed_edits) pg_edit_free (e);
  vec_free (s->non_fixed_edits);
  vec_foreach (g, s->edit_groups) pg_edit_group_free (g);
  vec_free (s->edit_groups);
  vec_free (s->fixed_packet_data);
  vec_free (s->fixed_packet_data_mask);
  vec_free (s->name);
  for (i = 0; i < vec_len (s->replay_packet_templates); i++)
    vec_free (s->replay_packet_templates[i]);
  vec_free (s->replay_packet_templates);
  vec_free (s->replay_packet_timestamps);

  {
    pg_buffer_index_t *bi;
    vec_foreach (bi, s->buffer_indices) pg_buffer_index_free (bi);
    vec_free (s->buffer_indices);
  }
}

always_inline int
pg_stream_is_enabled (pg_stream_t * s)
{
  return (s->flags & PG_STREAM_FLAGS_IS_ENABLED) != 0;
}

always_inline pg_edit_group_t *
pg_stream_get_group (pg_stream_t * s, u32 group_index)
{
  return vec_elt_at_index (s->edit_groups, group_index);
}

always_inline void *
pg_create_edit_group (pg_stream_t * s,
		      int n_edit_bytes, int n_packet_bytes, u32 * group_index)
{
  pg_edit_group_t *g;
  int n_edits;

  vec_add2 (s->edit_groups, g, 1);
  if (group_index)
    *group_index = g - s->edit_groups;

  ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
  n_edits = n_edit_bytes / sizeof (pg_edit_t);
  vec_resize (g->edits, n_edits);

  g->n_packet_bytes = n_packet_bytes;

  return g->edits;
}

always_inline void *
pg_add_edits (pg_stream_t * s, int n_edit_bytes, int n_packet_bytes,
	      u32 group_index)
{
  pg_edit_group_t *g = pg_stream_get_group (s, group_index);
  pg_edit_t *e;
  int n_edits;
  ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
  n_edits = n_edit_bytes / sizeof (pg_edit_t);
  vec_add2 (g->edits, e, n_edits);
  g->n_packet_bytes += n_packet_bytes;
  return e;
}

always_inline void *
pg_get_edit_group (pg_stream_t * s, u32 group_index)
{
  pg_edit_group_t *g = pg_stream_get_group (s, group_index);
  return g->edits;
}

/* Number of bytes for all groups >= given group. */
always_inline uword
pg_edit_group_n_bytes (pg_stream_t * s, u32 group_index)
{
  pg_edit_group_t *g;
  uword n_bytes = 0;

  for (g = s->edit_groups + group_index; g < vec_end (s->edit_groups); g++)
    n_bytes += g->n_packet_bytes;
  return n_bytes;
}

always_inline void
pg_free_edit_group (pg_stream_t * s)
{
  uword i = vec_len (s->edit_groups) - 1;
  pg_edit_group_t *g = pg_stream_get_group (s, i);

  pg_edit_group_free (g);
  clib_memset (g, 0, sizeof (g[0]));
  _vec_len (s->edit_groups) = i;
}

typedef struct
{
  /* TX lock */
  volatile u32 *lockp;

  /* VLIB interface indices. */
  u32 hw_if_index, sw_if_index;

  /* Identifies stream for this interface. */
  u32 id;

  u8 coalesce_enabled;
  gro_flow_table_t *flow_table;
  u8 gso_enabled;
  u32 gso_size;
  pcap_main_t pcap_main;
  char *pcap_file_name;

  mac_address_t *allowed_mcast_macs;
} pg_interface_t;

/* Per VLIB node data. */
typedef struct
{
  /* Parser function indexed by node index. */
  unformat_function_t *unformat_edit;
} pg_node_t;

typedef struct pg_main_t
{
  /* Pool of streams. */
  pg_stream_t *streams;

  /* Bitmap indicating which streams are currently enabled. */
  uword **enabled_streams;

  /* Hash mapping name -> stream index. */
  uword *stream_index_by_name;

  /* Pool of interfaces. */
  pg_interface_t *interfaces;
  uword *if_index_by_if_id;
  uword *if_id_by_sw_if_index;

  /* Vector of buffer indices for use in pg_stream_fill_replay, per thread */
  u32 **replay_buffers_by_thread;

  /* Per VLIB node information. */
  pg_node_t *nodes;
} pg_main_t;

/* Global main structure. */
extern pg_main_t pg_main;

/* Global node. */
extern vlib_node_registration_t pg_input_node;

/* Buffer generator input, output node functions. */
vlib_node_function_t pg_input, pg_output;

/* Stream add/delete. */
void pg_stream_del (pg_main_t * pg, uword index);
void pg_stream_add (pg_main_t * pg, pg_stream_t * s_init);
void pg_stream_change (pg_main_t * pg, pg_stream_t * s);

/* Enable/disable stream. */
void pg_stream_enable_disable (pg_main_t * pg, pg_stream_t * s,
			       int is_enable);

/* Enable/disable packet coalesce on given interface */
void pg_interface_enable_disable_coalesce (pg_interface_t * pi, u8 enable,
					   u32 tx_node_index);

/* Find/create free packet-generator interface index. */
u32 pg_interface_add_or_get (pg_main_t * pg, uword stream_index,
			     u8 gso_enabled, u32 gso_size,
			     u8 coalesce_enabled);

always_inline pg_node_t *
pg_get_node (uword node_index)
{
  pg_main_t *pg = &pg_main;
  vec_validate (pg->nodes, node_index);
  return pg->nodes + node_index;
}

void pg_edit_group_get_fixed_packet_data (pg_stream_t * s,
					  u32 group_index,
					  void *fixed_packet_data,
					  void *fixed_packet_data_mask);

void pg_enable_disable (u32 stream_index, int is_enable);

typedef struct
{
  u32 hw_if_index;
  u32 dev_instance;
  u8 is_enabled;
  char *pcap_file_name;
  u32 count;
} pg_capture_args_t;

clib_error_t *pg_capture (pg_capture_args_t * a);

typedef struct
{
  vlib_buffer_t buffer;
  u32 buffer_index;
}
pg_output_trace_t;

#endif /* included_vlib_pg_h */

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