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/*
* 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>
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_registration_t *nr, u8 *variant)
{
vlib_node_fn_registration_t *fnr = nr->node_fn_registrations;
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;
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, variant);
nr = nr->next_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, 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:
*/
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