aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/gbp/gbp_bridge_domain.c
blob: 73daa9d6d806a51331f66f56df5c1d62f6f560f3 (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
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/*
 * 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 <plugins/gbp/gbp_bridge_domain.h>
#include <plugins/gbp/gbp_endpoint.h>
#include <plugins/gbp/gbp_learn.h>

#include <vnet/dpo/dvr_dpo.h>
#include <vnet/fib/fib_table.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/feat_bitmap.h>
#include <vnet/l2/l2_bvi.h>
#include <vnet/l2/l2_fib.h>

/**
 * Pool of GBP bridge_domains
 */
gbp_bridge_domain_t *gbp_bridge_domain_pool;

/**
 * DB of bridge_domains
 */
gbp_bridge_domain_db_t gbp_bridge_domain_db;

/**
 * logger
 */
vlib_log_class_t gb_logger;

#define GBP_BD_DBG(...)                           \
    vlib_log_debug (gb_logger, __VA_ARGS__);

index_t
gbp_bridge_domain_index (const gbp_bridge_domain_t * gbd)
{
  return (gbd - gbp_bridge_domain_pool);
}

static void
gbp_bridge_domain_lock (index_t i)
{
  gbp_bridge_domain_t *gb;

  gb = gbp_bridge_domain_get (i);
  gb->gb_locks++;
}

u32
gbp_bridge_domain_get_bd_id (index_t gbdi)
{
  gbp_bridge_domain_t *gb;

  gb = gbp_bridge_domain_get (gbdi);

  return (gb->gb_bd_id);
}

static index_t
gbp_bridge_domain_find (u32 bd_id)
{
  uword *p;

  p = hash_get (gbp_bridge_domain_db.gbd_by_bd_id, bd_id);

  if (NULL != p)
    return p[0];

  return (INDEX_INVALID);
}

index_t
gbp_bridge_domain_find_and_lock (u32 bd_id)
{
  uword *p;

  p = hash_get (gbp_bridge_domain_db.gbd_by_bd_id, bd_id);

  if (NULL != p)
    {
      gbp_bridge_domain_lock (p[0]);
      return p[0];
    }
  return (INDEX_INVALID);
}

static void
gbp_bridge_domain_db_add (gbp_bridge_domain_t * gb)
{
  index_t gbi = gb - gbp_bridge_domain_pool;

  hash_set (gbp_bridge_domain_db.gbd_by_bd_id, gb->gb_bd_id, gbi);
  vec_validate_init_empty (gbp_bridge_domain_db.gbd_by_bd_index,
			   gb->gb_bd_index, INDEX_INVALID);
  gbp_bridge_domain_db.gbd_by_bd_index[gb->gb_bd_index] = gbi;
}

static void
gbp_bridge_domain_db_remove (gbp_bridge_domain_t * gb)
{
  hash_unset (gbp_bridge_domain_db.gbd_by_bd_id, gb->gb_bd_id);
  gbp_bridge_domain_db.gbd_by_bd_index[gb->gb_bd_index] = INDEX_INVALID;
}

u8 *
format_gbp_bridge_domain_flags (u8 * s, va_list * args)
{
  gbp_bridge_domain_flags_t gf = va_arg (*args, gbp_bridge_domain_flags_t);

  if (gf)
    {
      if (gf & GBP_BD_FLAG_DO_NOT_LEARN)
	s = format (s, "do-not-learn ");
      if (gf & GBP_BD_FLAG_UU_FWD_DROP)
	s = format (s, "uu-fwd-drop ");
      if (gf & GBP_BD_FLAG_MCAST_DROP)
	s = format (s, "mcast-drop ");
      if (gf & GBP_BD_FLAG_UCAST_ARP)
	s = format (s, "ucast-arp ");
    }
  else
    {
      s = format (s, "none");
    }
  return (s);
}

static u8 *
format_gbp_bridge_domain_ptr (u8 * s, va_list * args)
{
  gbp_bridge_domain_t *gb = va_arg (*args, gbp_bridge_domain_t *);
  vnet_main_t *vnm = vnet_get_main ();

  if (NULL != gb)
    s = format (s, "[%d] bd:[%d,%d], bvi:%U uu-flood:%U flags:%U locks:%d",
		gb - gbp_bridge_domain_pool,
		gb->gb_bd_id,
		gb->gb_bd_index,
		format_vnet_sw_if_index_name, vnm, gb->gb_bvi_sw_if_index,
		format_vnet_sw_if_index_name, vnm, gb->gb_uu_fwd_sw_if_index,
		format_gbp_bridge_domain_flags, gb->gb_flags, gb->gb_locks);
  else
    s = format (s, "NULL");

  return (s);
}

u8 *
format_gbp_bridge_domain (u8 * s, va_list * args)
{
  index_t gbi = va_arg (*args, index_t);

  s =
    format (s, "%U", format_gbp_bridge_domain_ptr,
	    gbp_bridge_domain_get (gbi));

  return (s);
}

int
gbp_bridge_domain_add_and_lock (u32 bd_id,
				gbp_bridge_domain_flags_t flags,
				u32 bvi_sw_if_index,
				u32 uu_fwd_sw_if_index,
				u32 bm_flood_sw_if_index)
{
  gbp_bridge_domain_t *gb;
  index_t gbi;

  gbi = gbp_bridge_domain_find (bd_id);

  if (INDEX_INVALID == gbi)
    {
      u32 bd_index;

      bd_index = bd_find_index (&bd_main, bd_id);

      if (~0 == bd_index)
	return (VNET_API_ERROR_BD_NOT_MODIFIABLE);

      bd_flags_t bd_flags = L2_LEARN;
      if (flags & GBP_BD_FLAG_UU_FWD_DROP)
	bd_flags |= L2_UU_FLOOD;
      if (flags & GBP_BD_FLAG_MCAST_DROP)
	bd_flags |= L2_FLOOD;

      pool_get (gbp_bridge_domain_pool, gb);
      memset (gb, 0, sizeof (*gb));

      gb->gb_bd_id = bd_id;
      gb->gb_bd_index = bd_index;
      gb->gb_uu_fwd_sw_if_index = uu_fwd_sw_if_index;
      gb->gb_bvi_sw_if_index = bvi_sw_if_index;
      gb->gb_bm_flood_sw_if_index = bm_flood_sw_if_index;
      gb->gb_locks = 1;
      gb->gb_flags = flags;

      /*
       * Set the BVI and uu-flood interfaces into the BD
       */
      set_int_l2_mode (vlib_get_main (), vnet_get_main (),
		       MODE_L2_BRIDGE, gb->gb_bvi_sw_if_index,
		       bd_index, L2_BD_PORT_TYPE_BVI, 0, 0);

      if (!(flags & GBP_BD_FLAG_UU_FWD_DROP)
	  && ~0 != gb->gb_uu_fwd_sw_if_index)
	{
	  set_int_l2_mode (vlib_get_main (), vnet_get_main (),
			   MODE_L2_BRIDGE, gb->gb_uu_fwd_sw_if_index,
			   bd_index, L2_BD_PORT_TYPE_UU_FWD, 0, 0);
	}
      if (!(flags & GBP_BD_FLAG_MCAST_DROP)
	  && ~0 != gb->gb_bm_flood_sw_if_index)
	{
	  set_int_l2_mode (vlib_get_main (), vnet_get_main (),
			   MODE_L2_BRIDGE, gb->gb_bm_flood_sw_if_index,
			   bd_index, L2_BD_PORT_TYPE_NORMAL, 0, 0);
	  gbp_learn_enable (gb->gb_bm_flood_sw_if_index, GBP_LEARN_MODE_L2);
	}

      /*
       * unset learning in the bridge + any flag(s) set above
       */
      bd_set_flags (vlib_get_main (), bd_index, bd_flags, 0);

      /*
       * Add the BVI's MAC to the L2FIB
       */
      l2fib_add_entry (vnet_sw_interface_get_hw_address
		       (vnet_get_main (), gb->gb_bvi_sw_if_index),
		       gb->gb_bd_index, gb->gb_bvi_sw_if_index,
		       (L2FIB_ENTRY_RESULT_FLAG_STATIC |
			L2FIB_ENTRY_RESULT_FLAG_BVI));

      gbp_bridge_domain_db_add (gb);
    }
  else
    {
      gb = gbp_bridge_domain_get (gbi);
      gb->gb_locks++;
    }

  GBP_BD_DBG ("add: %U", format_gbp_bridge_domain_ptr, gb);

  return (0);
}

void
gbp_bridge_domain_unlock (index_t index)
{
  gbp_bridge_domain_t *gb;

  gb = gbp_bridge_domain_get (index);

  gb->gb_locks--;

  if (0 == gb->gb_locks)
    {
      GBP_BD_DBG ("destroy: %U", format_gbp_bridge_domain_ptr, gb);

      l2fib_del_entry (vnet_sw_interface_get_hw_address
		       (vnet_get_main (), gb->gb_bvi_sw_if_index),
		       gb->gb_bd_index, gb->gb_bvi_sw_if_index);

      set_int_l2_mode (vlib_get_main (), vnet_get_main (),
		       MODE_L3, gb->gb_bvi_sw_if_index,
		       gb->gb_bd_index, L2_BD_PORT_TYPE_BVI, 0, 0);
      if (~0 != gb->gb_uu_fwd_sw_if_index)
	{
	  set_int_l2_mode (vlib_get_main (), vnet_get_main (),
			   MODE_L3, gb->gb_uu_fwd_sw_if_index,
			   gb->gb_bd_index, L2_BD_PORT_TYPE_UU_FWD, 0, 0);
	}
      if (~0 != gb->gb_bm_flood_sw_if_index)
	{
	  set_int_l2_mode (vlib_get_main (), vnet_get_main (),
			   MODE_L3, gb->gb_bm_flood_sw_if_index,
			   gb->gb_bd_index, L2_BD_PORT_TYPE_NORMAL, 0, 0);
	  gbp_learn_enable (gb->gb_bm_flood_sw_if_index, GBP_LEARN_MODE_L2);
	}

      gbp_bridge_domain_db_remove (gb);

      pool_put (gbp_bridge_domain_pool, gb);
    }
}

int
gbp_bridge_domain_delete (u32 bd_id)
{
  index_t gbi;

  GBP_BD_DBG ("del: %d", bd_id);
  gbi = gbp_bridge_domain_find (bd_id);

  if (INDEX_INVALID != gbi)
    {
      GBP_BD_DBG ("del: %U", format_gbp_bridge_domain, gbi);
      gbp_bridge_domain_unlock (gbi);

      return (0);
    }

  return (VNET_API_ERROR_NO_SUCH_ENTRY);
}

void
gbp_bridge_domain_walk (gbp_bridge_domain_cb_t cb, void *ctx)
{
  gbp_bridge_domain_t *gbpe;

  /* *INDENT-OFF* */
  pool_foreach(gbpe, gbp_bridge_domain_pool,
  {
    if (!cb(gbpe, ctx))
      break;
  });
  /* *INDENT-ON* */
}

static clib_error_t *
gbp_bridge_domain_cli (vlib_main_t * vm,
		       unformat_input_t * input, vlib_cli_command_t * cmd)
{
  vnet_main_t *vnm = vnet_get_main ();
  gbp_bridge_domain_flags_t flags;
  u32 bm_flood_sw_if_index = ~0;
  u32 uu_fwd_sw_if_index = ~0;
  u32 bvi_sw_if_index = ~0;
  u32 bd_id = ~0;
  u8 add = 1;

  flags = GBP_BD_FLAG_NONE;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "bvi %U", unformat_vnet_sw_interface,
		    vnm, &bvi_sw_if_index))
	;
      else if (unformat (input, "uu-fwd %U", unformat_vnet_sw_interface,
			 vnm, &uu_fwd_sw_if_index))
	;
      else if (unformat (input, "bm-flood %U", unformat_vnet_sw_interface,
			 vnm, &bm_flood_sw_if_index))
	;
      else if (unformat (input, "add"))
	add = 1;
      else if (unformat (input, "del"))
	add = 0;
      else if (unformat (input, "flags %d", &flags))
	;
      else if (unformat (input, "bd %d", &bd_id))
	;
      else
	break;
    }

  if (~0 == bd_id)
    return clib_error_return (0, "BD-ID must be specified");

  if (add)
    {
      if (~0 == bvi_sw_if_index)
	return clib_error_return (0, "interface must be specified");

      gbp_bridge_domain_add_and_lock (bd_id, flags,
				      bvi_sw_if_index,
				      uu_fwd_sw_if_index,
				      bm_flood_sw_if_index);
    }
  else
    gbp_bridge_domain_delete (bd_id);

  return (NULL);
}

/*?
 * Configure a GBP bridge-domain
 *
 * @cliexpar
 * @cliexstart{gbp bridge-domain [del] bd <ID> bvi <interface> [uu-fwd <interface>] [bm-flood <interface>] [flags <flags>]}
 * @cliexend
 ?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_bridge_domain_cli_node, static) = {
  .path = "gbp bridge-domain",
  .short_help = "gbp bridge-domain [del] bd <ID> bvi <interface> [uu-fwd <interface>] [bm-flood <interface>] [flags <flags>]",
  .function = gbp_bridge_domain_cli,
};

static int
gbp_bridge_domain_show_one (gbp_bridge_domain_t *gb, void *ctx)
{
  vlib_main_t *vm;

  vm = ctx;
  vlib_cli_output (vm, "  %U", format_gbp_bridge_domain_ptr, gb);

  return (1);
}

static clib_error_t *
gbp_bridge_domain_show (vlib_main_t * vm,
		   unformat_input_t * input, vlib_cli_command_t * cmd)
{
  vlib_cli_output (vm, "Bridge-Domains:");
  gbp_bridge_domain_walk (gbp_bridge_domain_show_one, vm);

  return (NULL);
}


/*?
 * Show Group Based Policy Bridge_Domains and derived information
 *
 * @cliexpar
 * @cliexstart{show gbp bridge_domain}
 * @cliexend
 ?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_bridge_domain_show_node, static) = {
  .path = "show gbp bridge-domain",
  .short_help = "show gbp bridge-domain\n",
  .function = gbp_bridge_domain_show,
};
/* *INDENT-ON* */

static clib_error_t *
gbp_bridge_domain_init (vlib_main_t * vm)
{
  gb_logger = vlib_log_register_class ("gbp", "bd");

  return (NULL);
}

VLIB_INIT_FUNCTION (gbp_bridge_domain_init);

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