src/vnet/ip/ip_table.h

   1 /*
   2  * Copyright (c) 2020 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef included_ip_table_h
  17 #define included_ip_table_h
  18
  19 #include <vnet/vnet.h>
  20
  21 typedef enum vnet_ip_table_function_priority_t_
  22 {
  23   VNET_IP_TABLE_FUNC_PRIORITY_LOW,
  24   VNET_IP_TABLE_FUNC_PRIORITY_HIGH,
  25 } vnet_ip_table_function_priority_t;
  26 #define VNET_IP_TABLE_FUNC_N_PRIO ((vnet_ip_table_function_priority_t)VNET_IP_TABLE_FUNC_PRIORITY_HIGH+1)
  27
  28 #ifndef CLIB_MARCH_VARIANT
  29 #define _VNET_IP_TABLE_FUNCTION_DECL_PRIO(f,tag,p)                    \
  30                                                                         \
  31 static void __vnet_ip_table_function_init_##tag##_##f (void)           \
  32     __attribute__((__constructor__)) ;                                  \
  33                                                                         \
  34 static void __vnet_ip_table_function_init_##tag##_##f (void)           \
  35 {                                                                       \
  36  vnet_main_t * vnm = vnet_get_main();                                   \
  37  static _vnet_ip_table_function_list_elt_t init_function;              \
  38  init_function.next_ip_table_function = vnm->tag##_functions[p];       \
  39  vnm->tag##_functions[p] = &init_function;                              \
  40  init_function.fp = (void *) &f;                                        \
  41 }                                                                       \
  42 static void __vnet_ip_table_function_deinit_##tag##_##f (void)         \
  43     __attribute__((__destructor__)) ;                                   \
  44                                                                         \
  45 static void __vnet_ip_table_function_deinit_##tag##_##f (void)         \
  46 {                                                                       \
  47  vnet_main_t * vnm = vnet_get_main();                                   \
  48  _vnet_ip_table_function_list_elt_t *next;                             \
  49  if (vnm->tag##_functions[p]->fp == f)                                  \
  50     {                                                                   \
  51       vnm->tag##_functions[p] =                                         \
  52         vnm->tag##_functions[p]->next_ip_table_function;               \
  53       return;                                                           \
  54     }                                                                   \
  55   next = vnm->tag##_functions[p];                                       \
  56   while (next->next_ip_table_function)                                 \
  57     {                                                                   \
  58       if (next->next_ip_table_function->fp == f)                       \
  59         {                                                               \
  60           next->next_ip_table_function =                               \
  61             next->next_ip_table_function->next_ip_table_function;     \
  62           return;                                                       \
  63         }                                                               \
  64       next = next->next_ip_table_function;                             \
  65     }                                                                   \
  66 }
  67 #else
  68 /* create unused pointer to silence compiler warnings and get whole
  69    function optimized out */
  70 #define _VNET_IP_TABLE_FUNCTION_DECL_PRIO(f,tag,p)                    \
  71 static __clib_unused void * __clib_unused_##f = f;
  72 #endif
  73
  74 #define _VNET_IP_TABLE_FUNCTION_DECL(f,tag)                            \
  75   _VNET_IP_TABLE_FUNCTION_DECL_PRIO(f,tag,VNET_ITF_FUNC_PRIORITY_LOW)
  76
  77 #define VNET_IP_TABLE_ADD_DEL_FUNCTION(f)                       \
  78   _VNET_IP_TABLE_FUNCTION_DECL(f,ip_table_add_del)
  79
  80 #endif /* included_ip_table_h */
  81
  82 /*
  83  * fd.io coding-style-patch-verification: ON
  84  *
  85  * Local Variables:
  86  * eval: (c-set-style "gnu")
  87  * End:
  88  */