aboutsummaryrefslogtreecommitdiffstats
path: root/src/vlib/node_init.c
blob: 232eeb35e3ca5ff0b2dc2c1905a8bf3723fb848e (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
/*
 * 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.
 */
/*
 * node_init.c: node march variant startup initialization
 *
 * Copyright (c) 2020 Intel Corporation
 *
 * 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.
 */

#include <sys/types.h>
#include <fcntl.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>

typedef struct _vlib_node_march_variant
{
  struct _vlib_node_march_variant *next_variant;
  char *name;
} vlib_node_march_variant_t;

#define VLIB_VARIANT_REGISTER()			\
  static vlib_node_march_variant_t			\
  CLIB_MARCH_VARIANT##variant;				\
							\
  static void __clib_constructor			\
  CLIB_MARCH_VARIANT##_register (void)			\
  {							\
    extern vlib_node_march_variant_t *variants;	\
    vlib_node_march_variant_t *v;			\
    v = & CLIB_MARCH_VARIANT##variant;			\
    v->name = CLIB_MARCH_VARIANT_STR;			\
    v->next_variant = variants;			\
    variants = v;					\
  }							\

VLIB_VARIANT_REGISTER ();

#ifndef CLIB_MARCH_VARIANT

vlib_node_march_variant_t *variants = 0;

uword
unformat_vlib_node_variant (unformat_input_t * input, va_list * args)
{
  u8 **variant = va_arg (*args, u8 **);
  vlib_node_march_variant_t *v = variants;

  if (!unformat (input, "%v", variant))
    return 0;

  while (v)
    {
      if (!strncmp (v->name, (char *) *variant, vec_len (*variant)))
	return 1;

      v = v->next_variant;
    }

  return 0;
}

static_always_inline void
vlib_update_nr_variant_default (vlib_node_fn_registration_t * fnr,
				u8 * variant)
{
  vlib_node_fn_registration_t *p_reg = 0;
  vlib_node_fn_registration_t *v_reg = 0;
  u32 tmp;

  while (fnr)
    {
      /* which is the highest priority registration */
      if (!p_reg || fnr->priority > p_reg->priority)
	p_reg = fnr;

      /* which is the variant we want to prioritize */
      if (!strncmp (fnr->name, (char *) variant, vec_len (variant) - 1))
	v_reg = fnr;

      fnr = fnr->next_registration;
    }

  /* node doesn't have the variants */
  if (!v_reg)
    return;

  ASSERT (p_reg != 0 && v_reg != 0);

  /* swap priorities */
  tmp = p_reg->priority;
  p_reg->priority = v_reg->priority;
  v_reg->priority = tmp;

}

static clib_error_t *
vlib_early_node_config (vlib_main_t * vm, unformat_input_t * input)
{
  clib_error_t *error = 0;
  vlib_node_registration_t *nr, **all;
  vnet_device_class_t *c;
  vnet_main_t *vnm = vnet_get_main ();
  unformat_input_t sub_input;
  uword *hash = 0, *p;
  u8 *variant = 0;
  u8 *s = 0;

  all = 0;
  hash = hash_create_string (0, sizeof (uword));

  nr = vm->node_main.node_registrations;
  while (nr)
    {
      hash_set_mem (hash, nr->name, vec_len (all));
      vec_add1 (all, nr);

      nr = nr->next_registration;
    }

  /* specify prioritization defaults for all graph nodes */
  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "default %U", unformat_vlib_cli_sub_input,
		    &sub_input))
	{
	  while (unformat_check_input (&sub_input) != UNFORMAT_END_OF_INPUT)
	    {
	      if (!unformat (&sub_input, "variant %U",
			     unformat_vlib_node_variant, &variant))
		return clib_error_return (0,
					  "please specify a valid node variant");
	      vec_add1 (variant, 0);

	      nr = vm->node_main.node_registrations;
	      while (nr)
		{
		  vlib_update_nr_variant_default (nr->node_fn_registrations,
						  variant);
		  nr = nr->next_registration;
		}

	      /* also apply it to interfaces */
	      c = vnm->device_class_registrations;
	      while (c)
		{
		  vlib_update_nr_variant_default (c->tx_fn_registrations,
						  variant);
		  c = c->next_class_registration;
		}

	      vec_free (variant);
	    }
	}
      else /* specify prioritization for an individual graph node */
      if (unformat (input, "%s", &s))
	{
	  if (!(p = hash_get_mem (hash, s)))
	    {
	      error = clib_error_return (0,
					 "node variants: unknown graph node '%s'",
					 s);
	      break;
	    }

	  nr = vec_elt (all, p[0]);

	  if (unformat (input, "%U", unformat_vlib_cli_sub_input, &sub_input))
	    {
	      while (unformat_check_input (&sub_input) !=
		     UNFORMAT_END_OF_INPUT)
		{
		  if (!unformat (&sub_input, "variant %U",
				 unformat_vlib_node_variant, &variant))
		    return clib_error_return (0,
					      "please specify a valid node variant");
		  vec_add1 (variant, 0);

		  vlib_update_nr_variant_default (nr->node_fn_registrations,
						  variant);

		  vec_free (variant);
		}
	    }
	}
      else
	{
	  break;
	}
    }

  hash_free (hash);
  vec_free (all);
  unformat_free (input);

  return error;
}

VLIB_EARLY_CONFIG_FUNCTION (vlib_early_node_config, "node");

#endif

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