aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/avf/flow.c
blob: bdb07ba849b9e4f80901865ce592892ab85a496a (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
/*
 *------------------------------------------------------------------
 * Copyright (c) 2020 Intel 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 <stdbool.h>
#include <vlib/vlib.h>
#include <vppinfra/ring.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
#include <vnet/ethernet/ethernet.h>

#include <avf/avf.h>
#include <avf/avf_advanced_flow.h>

int
avf_fdir_vc_op_callback (void *vc_hdl, enum virthnl_adv_ops vc_op, void *in,
			 u32 in_len, void *out, u32 out_len)
{
  u32 dev_instance = *(u32 *) vc_hdl;
  avf_device_t *ad = avf_get_device (dev_instance);
  clib_error_t *err = 0;
  int is_add;

  if (vc_op >= VIRTCHNL_ADV_OP_MAX)
    {
      return -1;
    }

  switch (vc_op)
    {
    case VIRTCHNL_ADV_OP_ADD_FDIR_FILTER:
      is_add = 1;
      break;
    case VIRTCHNL_ADV_OP_DEL_FDIR_FILTER:
      is_add = 0;
      break;
    default:
      avf_log_err (ad, "unsupported avf virtual channel opcode %u\n",
		   (u32) vc_op);
      return -1;
    }

  err = avf_program_flow (dev_instance, is_add, in, in_len, out, out_len);
  if (err != 0)
    {
      avf_log_err (ad, "avf fdir program failed: %U", format_clib_error, err);
      clib_error_free (err);
      return -1;
    }

  avf_log_debug (ad, "avf fdir program success");
  return 0;
}

static int
avf_flow_add (u32 dev_instance, vnet_flow_t *f, avf_flow_entry_t *fe)
{
  avf_device_t *ad = avf_get_device (dev_instance);
  int rv = 0;
  int ret = 0;
  u16 src_port = 0, dst_port = 0;
  u16 src_port_mask = 0, dst_port_mask = 0;
  u8 protocol = IP_PROTOCOL_RESERVED;
  bool fate = false;
  struct avf_flow_error error;

  int layer = 0;
  int action_count = 0;

  struct avf_fdir_vc_ctx vc_ctx;
  struct avf_fdir_conf *filter;
  struct avf_flow_item avf_items[VIRTCHNL_MAX_NUM_PROTO_HDRS];
  struct avf_flow_action avf_actions[VIRTCHNL_MAX_NUM_ACTIONS];

  struct avf_ipv4_hdr ip4_spec, ip4_mask;
  struct avf_tcp_hdr tcp_spec, tcp_mask;
  struct avf_udp_hdr udp_spec, udp_mask;
  struct avf_gtp_hdr gtp_spec, gtp_mask;

  struct avf_flow_action_queue act_q;
  struct avf_flow_action_mark act_msk;

  ret = avf_fdir_rcfg_create (&filter, 0, ad->vsi_id, ad->n_rx_queues);
  if (ret)
    {
      rv = VNET_FLOW_ERROR_INTERNAL;
      goto done;
    }

  /* init a virtual channel context */
  vc_ctx.vc_hdl = &dev_instance;
  vc_ctx.vc_op = avf_fdir_vc_op_callback;

  clib_memset (avf_items, 0, sizeof (avf_actions));
  clib_memset (avf_actions, 0, sizeof (avf_actions));

  /* Ethernet Layer */
  avf_items[layer].type = VIRTCHNL_PROTO_HDR_ETH;
  avf_items[layer].spec = NULL;
  layer++;

  /* IPv4 Layer */
  if ((f->type == VNET_FLOW_TYPE_IP4_N_TUPLE) ||
      (f->type == VNET_FLOW_TYPE_IP4_GTPU))
    {
      vnet_flow_ip4_n_tuple_t *t4 = &f->ip4_n_tuple;
      memset (&ip4_spec, 0, sizeof (ip4_spec));
      memset (&ip4_mask, 0, sizeof (ip4_mask));

      /* IPv4 Layer */
      avf_items[layer].type = VIRTCHNL_PROTO_HDR_IPV4;
      avf_items[layer].spec = &ip4_spec;
      avf_items[layer].mask = &ip4_mask;
      layer++;

      src_port = t4->src_port.port;
      dst_port = t4->dst_port.port;
      src_port_mask = t4->src_port.mask;
      dst_port_mask = t4->dst_port.mask;
      protocol = t4->protocol.prot;

      if (t4->src_addr.mask.as_u32)
	{
	  ip4_spec.src_addr = t4->src_addr.addr.as_u32;
	  ip4_mask.src_addr = t4->src_addr.mask.as_u32;
	}
      if (t4->dst_addr.mask.as_u32)
	{
	  ip4_spec.dst_addr = t4->dst_addr.addr.as_u32;
	  ip4_mask.dst_addr = t4->dst_addr.mask.as_u32;
	}
    }

  if (protocol == IP_PROTOCOL_TCP)
    {
      memset (&tcp_spec, 0, sizeof (tcp_spec));
      memset (&tcp_mask, 0, sizeof (tcp_mask));

      avf_items[layer].type = VIRTCHNL_PROTO_HDR_TCP;
      avf_items[layer].spec = &tcp_spec;
      avf_items[layer].mask = &tcp_mask;
      layer++;

      if (src_port_mask)
	{
	  tcp_spec.src_port = clib_host_to_net_u16 (src_port);
	  tcp_mask.src_port = clib_host_to_net_u16 (src_port_mask);
	}
      if (dst_port_mask)
	{
	  tcp_spec.dst_port = clib_host_to_net_u16 (dst_port);
	  tcp_mask.dst_port = clib_host_to_net_u16 (dst_port_mask);
	}
    }
  else if (protocol == IP_PROTOCOL_UDP)
    {
      memset (&udp_spec, 0, sizeof (udp_spec));
      memset (&udp_mask, 0, sizeof (udp_mask));

      avf_items[layer].type = VIRTCHNL_PROTO_HDR_UDP;
      avf_items[layer].spec = &udp_spec;
      avf_items[layer].mask = &udp_mask;
      layer++;

      if (src_port_mask)
	{
	  udp_spec.src_port = clib_host_to_net_u16 (src_port);
	  udp_mask.src_port = clib_host_to_net_u16 (src_port_mask);
	}
      if (dst_port_mask)
	{
	  udp_spec.dst_port = clib_host_to_net_u16 (dst_port);
	  udp_mask.dst_port = clib_host_to_net_u16 (dst_port_mask);
	}
    }
  else
    {
      rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
      goto done;
    }

  if (f->type == VNET_FLOW_TYPE_IP4_GTPU)
    {

      memset (&gtp_spec, 0, sizeof (gtp_spec));
      memset (&gtp_mask, 0, sizeof (gtp_mask));

      vnet_flow_ip4_gtpu_t *gu = &f->ip4_gtpu;
      gtp_spec.teid = clib_host_to_net_u32 (gu->teid);
      gtp_mask.teid = ~0;

      avf_items[layer].type = VIRTCHNL_PROTO_HDR_GTPU_IP;
      avf_items[layer].spec = &gtp_spec;
      avf_items[layer].mask = &gtp_mask;
      layer++;
    }

  /* pattern end flag  */
  avf_items[layer].type = VIRTCHNL_PROTO_HDR_NONE;
  ret = avf_fdir_parse_pattern (filter, avf_items, &error);
  if (ret)
    {
      avf_log_err (ad, "avf fdir parse pattern failed: %s", error.message);
      rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
      goto done;
    }

  /* Action */
  /* Only one 'fate' can be assigned */
  if (f->actions & VNET_FLOW_ACTION_REDIRECT_TO_QUEUE)
    {
      avf_actions[action_count].type = VIRTCHNL_ACTION_QUEUE;
      avf_actions[action_count].conf = &act_q;

      act_q.index = f->redirect_queue;
      fate = true;
      action_count++;
    }

  if (f->actions & VNET_FLOW_ACTION_DROP)
    {
      avf_actions[action_count].type = VIRTCHNL_ACTION_DROP;
      avf_actions[action_count].conf = NULL;

      if (fate == true)
	{
	  rv = VNET_FLOW_ERROR_INTERNAL;
	  goto done;
	}
      else
	fate = true;

      action_count++;
    }

  if (fate == false)
    {
      avf_actions[action_count].type = VIRTCHNL_ACTION_PASSTHRU;
      avf_actions[action_count].conf = NULL;

      fate = true;
      action_count++;
    }

  if (f->actions & VNET_FLOW_ACTION_MARK)
    {
      avf_actions[action_count].type = VIRTCHNL_ACTION_MARK;
      avf_actions[action_count].conf = &act_msk;
      action_count++;

      act_msk.id = fe->mark;
    }

  /* action end flag */
  avf_actions[action_count].type = VIRTCHNL_ACTION_NONE;

  /* parse action */
  ret = avf_fdir_parse_action (avf_actions, filter, &error);
  if (ret)
    {
      avf_log_err (ad, "avf fdir parse action failed: %s", error.message);
      rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
      goto done;
    }

  /* create flow rule, save rule */
  ret = avf_fdir_rule_create (&vc_ctx, filter);

  if (ret)
    {
      avf_log_err (ad, "avf fdir rule create failed: %s",
		   avf_fdir_prgm_error_decode (ret));
      rv = VNET_FLOW_ERROR_INTERNAL;
      goto done;
    }
  else
    {
      fe->rcfg = filter;
    }
done:

  return rv;
}

int
avf_flow_ops_fn (vnet_main_t *vm, vnet_flow_dev_op_t op, u32 dev_instance,
		 u32 flow_index, uword *private_data)
{
  vnet_flow_t *flow = vnet_get_flow (flow_index);
  avf_device_t *ad = avf_get_device (dev_instance);
  avf_flow_entry_t *fe = NULL;
  avf_flow_lookup_entry_t *fle = NULL;
  int rv = 0;

  if ((ad->feature_bitmap & VIRTCHNL_VF_OFFLOAD_FDIR_PF) == 0)
    {
      rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
      goto done;
    }

  if (op == VNET_FLOW_DEV_OP_ADD_FLOW)
    {
      pool_get (ad->flow_entries, fe);
      fe->flow_index = flow->index;

      /* if we need to mark packets, assign one mark */
      if (flow->actions &
	  (VNET_FLOW_ACTION_MARK | VNET_FLOW_ACTION_REDIRECT_TO_NODE |
	   VNET_FLOW_ACTION_BUFFER_ADVANCE))
	{
	  /* reserve slot 0 */
	  if (ad->flow_lookup_entries == 0)
	    pool_get_aligned (ad->flow_lookup_entries, fle,
			      CLIB_CACHE_LINE_BYTES);
	  pool_get_aligned (ad->flow_lookup_entries, fle,
			    CLIB_CACHE_LINE_BYTES);
	  fe->mark = fle - ad->flow_lookup_entries;

	  /* install entry in the lookup table */
	  clib_memset (fle, -1, sizeof (*fle));
	  if (flow->actions & VNET_FLOW_ACTION_MARK)
	    fle->flow_id = flow->mark_flow_id;
	  if (flow->actions & VNET_FLOW_ACTION_REDIRECT_TO_NODE)
	    fle->next_index = flow->redirect_device_input_next_index;
	  if (flow->actions & VNET_FLOW_ACTION_BUFFER_ADVANCE)
	    fle->buffer_advance = flow->buffer_advance;

	  if ((ad->flags & AVF_DEVICE_F_RX_FLOW_OFFLOAD) == 0)
	    {
	      ad->flags |= AVF_DEVICE_F_RX_FLOW_OFFLOAD;
	    }
	}
      else
	fe->mark = 0;

      switch (flow->type)
	{
	case VNET_FLOW_TYPE_IP4_N_TUPLE:
	case VNET_FLOW_TYPE_IP4_GTPU:
	  if ((rv = avf_flow_add (dev_instance, flow, fe)))
	    goto done;
	  break;
	default:
	  rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
	  goto done;
	}

      *private_data = fe - ad->flow_entries;
    }
  else if (op == VNET_FLOW_DEV_OP_DEL_FLOW)
    {
      fe = vec_elt_at_index (ad->flow_entries, *private_data);

      struct avf_fdir_vc_ctx ctx;
      ctx.vc_hdl = &dev_instance;
      ctx.vc_op = avf_fdir_vc_op_callback;

      rv = avf_fdir_rule_destroy (&ctx, fe->rcfg);
      if (rv)
	return VNET_FLOW_ERROR_INTERNAL;

      if (fe->mark)
	{
	  fle = pool_elt_at_index (ad->flow_lookup_entries, fe->mark);
	  clib_memset (fle, -1, sizeof (*fle));
	  pool_put_index (ad->flow_lookup_entries, fe->mark);
	}

      (void) avf_fdir_rcfg_destroy (fe->rcfg);
      clib_memset (fe, 0, sizeof (*fe));
      pool_put (ad->flow_entries, fe);
      goto disable_rx_offload;
    }
  else
    return VNET_FLOW_ERROR_NOT_SUPPORTED;

done:
  if (rv)
    {
      if (fe)
	{
	  clib_memset (fe, 0, sizeof (*fe));
	  pool_put (ad->flow_entries, fe);
	}

      if (fle)
	{
	  clib_memset (fle, -1, sizeof (*fle));
	  pool_put (ad->flow_lookup_entries, fle);
	}
    }
disable_rx_offload:
  if ((ad->flags & AVF_DEVICE_F_RX_FLOW_OFFLOAD) != 0 &&
      pool_elts (ad->flow_entries) == 0)
    {
      ad->flags &= ~AVF_DEVICE_F_RX_FLOW_OFFLOAD;
    }

  return rv;
}

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