/* * Copyright (c) 2015 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. */ /* * init.h: mechanism for functions to be called at init/exit. * * Copyright (c) 2008 Eliot Dresselhaus * * 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. */ #ifndef included_vlib_init_h #define included_vlib_init_h #include #include #include /* Init/exit functions: called at start/end of main routine. Init functions are typically used to register and setup packet processing nodes. */ typedef clib_error_t *(vlib_init_function_t) (struct vlib_main_t * vm); typedef struct _vlib_init_function_list_elt { struct _vlib_init_function_list_elt *next_init_function; vlib_init_function_t *f; } _vlib_init_function_list_elt_t; /* Configuration functions: called with configuration input just before main polling loop starts. */ typedef clib_error_t *(vlib_config_function_t) (struct vlib_main_t * vm, unformat_input_t * input); typedef struct vlib_config_function_runtime_t { /* Function to call. Set to null once function has already been called. */ vlib_config_function_t *function; /* Input for function. */ unformat_input_t input; /* next config function registration */ struct vlib_config_function_runtime_t *next_registration; /* To be invoked as soon as the clib heap is available */ u8 is_early; /* Name used to distinguish input on command line. */ char name[32]; } vlib_config_function_runtime_t; #define VLIB_REMOVE_FROM_LINKED_LIST(first,p,next) \ { \ ASSERT (first); \ if (first == p) \ first = (p)->next; \ else \ { \ __typeof__ (p) current = first; \ while (current->next) \ { \ if (current->next == p) \ { \ current->next = current->next->next; \ break; \ } \ current = current->next; \ } \ ASSERT (current); \ } \ } #define _VLIB_INIT_FUNCTION_SYMBOL(x, type) \ _vlib_##type##_function_##x #define VLIB_INIT_FUNCTION_SYMBOL(x) \ _VLIB_INIT_FUNCTION_SYMBOL(x, init) #define VLIB_MAIN_LOOP_ENTER_FUNCTION_SYMBOL(x) \ _VLIB_INIT_FUNCTION_SYMBOL(x, main_loop_enter) #define VLIB_MAIN_LOOP_EXIT_FUNCTION_SYMBOL(x) \ _VLIB_INIT_FUNCTION_SYMBOL(x, main_loop_exit) #define VLIB_CONFIG_FUNCTION_SYMBOL(x) \ _VLIB_INIT_FUNCTION_SYMBOL(x, config) /* Declaration is global (e.g. not static) so that init functions can be called from other modules to resolve init function depend. */ #ifndef CLIB_MARCH_VARIANT #define VLIB_DECLARE_INIT_FUNCTION(x, tag) \ vlib_init_function_t * _VLIB_INIT_FUNCTION_SYMBOL (x, tag) = x; \ static void __vlib_add_##tag##_function_##x (void) \ __attribute__((__constructor__)) ; \ static void __vlib_add_##tag##_function_##x (void) \ { \ vlib_main_t * vm = vlib_get_main(); \ static _vlib_init_function_list_elt_t _vlib_init_function; \ _vlib_init_function.next_init_function \ = vm->tag##_function_registrations; \ vm->tag##_function_registrations = &_vlib_init_function; \ _vlib_init_function.f = &x; \ } \ static void __vlib_rm_##tag##_function_##x (void) \ __attribute__((__destructor__)) ; \ static void __vlib_rm_##tag##_function_##x (void) \ { \ vlib_main_t * vm = vlib_get_main(); \ _vlib_init_function_list_elt_t *next; \ if (vm->tag##_function_registrations->f == &x) \ { \ vm->tag##_function_registrations = \ vm->tag##_function_registrations->next_init_function; \ return; \ } \ next = vm->tag##_function_registrations; \ while (next->next_init_function) \ { \ if (next->next_init_function->f == &x)