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/*
* 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 <vppinfra/error.h>
#include <vppinfra/format.h>
#include <vppinfra/hash.h>
/* 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;
char *name;
char **runs_before;
char **runs_after;
char **init_order;
} _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 _vlib_init_function_list_elt_t _vlib_init_function_##tag_##x; \
static void __vlib_add_##tag##_function_##x (void) \
{ \
vlib_main_t * vm = vlib_get_main(); \
_vlib_init_function_##tag_##x.next_init_function \
= vm->tag##_function_registrations; \
vm->tag##_function_registrations = &_vlib_init_function_##tag_##x; \
_vlib_init_function_##tag_##x.f = &x; \
_vlib_init_function_##tag_##x.name = #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 *this, *prev; \
this = vm->tag##_function_registrations; \
if (this == 0) \
return; \
if (this->f == &x) \
{ \
vm->tag##_function_registrations = this->next_init_function; \
return; \
} \
prev = this; \
this = this->next_init_function; \
while (this) \
{ \
if (this->f == &x) \
{ \
prev->next_init_function = \
this->next_init_function; \
return; \
} \
prev = this; \
this = this->next_init_function; \
} \
} \
static _vlib_init_function_list_elt_t _vlib_init_function_##tag_##x
#else
/* create unused pointer to silence compiler warnings and get whole
function optimized out */
#define VLIB_DECLARE_INIT_FUNCTION(x, tag) \
static __clib_unused void * __clib_unused_##tag##_##x = x
#endif
#define VLIB_INIT_FUNCTION(x) VLIB_DECLARE_INIT_FUNCTION(x,init)
#define VLIB_WORKER_INIT_FUNCTION(x) VLIB_DECLARE_INIT_FUNCTION(x,worker_init)
#define VLIB_MAIN_LOOP_ENTER_FUNCTION(x) \
VLIB_DECLARE_INIT_FUNCTION(x,main_loop_enter)
#define VLIB_MAIN_LOOP_EXIT_FUNCTION(x) \
VLIB_DECLARE_INIT_FUNCTION(x,main_loop_exit)
#ifndef CLIB_MARCH_VARIANT
#define VLIB_CONFIG_FUNCTION(x,n,...) \
__VA_ARGS__ vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL(x); \
static void __vlib_add_config_function_##x (void) \
__attribute__((__constructor__)) ; \
static void __vlib_add_config_function_##x (void) \
{ \
vlib_main_t * vm = vlib_get_main(); \
VLIB_CONFIG_FUNCTION_SYMBOL(x).next_registration \
= vm->config_function_registrations; \
vm->config_function_registrations \
= &VLIB_CONFIG_FUNCTION_SYMBOL(x); \
} \
static void __vlib_rm_config_function_##x (void) \
__attribute__((__destructor__)) ; \
static void __vlib_rm_config_function_##x (void) \
{ \
vlib_main_t * vm = vlib_get_main(); \
vlib_config_function_runtime_t *p = \
& VLIB_CONFIG_FUNCTION_SYMBOL (x); \
VLIB_REMOVE_FROM_LINKED_LIST \
(vm->config_function_registrations, p, next_registration);\
} \
vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL (x) \
= { \
.name = n, \
.function = x, \
.is_early = 0, \
}
#else
/* create unused pointer to silence compiler warnings and get whole
function optimized out */
#define VLIB_CONFIG_FUNCTION(x,n,...) \
static __clib_unused vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL (__clib_unused_##x) \
= { \
.name = n, \
.function = x, \
.is_early = 0, \
}
#endif
#ifndef CLIB_MARCH_VARIANT
#define VLIB_EARLY_CONFIG_FUNCTION(x,n,...) \
__VA_ARGS__ vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL(x); \
static void __vlib_add_config_function_##x (void) \
__attribute__((__constructor__)) ; \
static void __vlib_add_config_function_##x (void) \
{ \
vlib_main_t * vm = vlib_get_main(); \
VLIB_CONFIG_FUNCTION_SYMBOL(x).next_registration \
= vm->config_function_registrations; \
vm->config_function_registrations \
= &VLIB_CONFIG_FUNCTION_SYMBOL(x); \
} \
static void __vlib_rm_config_function_##x (void) \
__attribute__((__destructor__)) ; \
static void __vlib_rm_config_function_##x (void) \
{ \
vlib_main_t * vm = vlib_get_main(); \
vlib_config_function_runtime_t *p = \
& VLIB_CONFIG_FUNCTION_SYMBOL (x); \
VLIB_REMOVE_FROM_LINKED_LIST \
(vm->config_function_registrations, p, next_registration);\
} \
vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL (x) \
= { \
.name = n, \
.function = x, \
.is_early = 1, \
}
#else
/* create unused pointer to silence compiler warnings and get whole
function optimized out */
#define VLIB_EARLY_CONFIG_FUNCTION(x,n,...) \
static __clib_unused vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL (__clib_unused_##x) \
= { \
.name = n, \
.function = x, \
.is_early = 1, \
}
#endif
/* Call given init function: used for init function dependencies. */
#define vlib_call_init_function(vm, x) \
({ \
extern vlib_init_function_t * VLIB_INIT_FUNCTION_SYMBOL (x); \
vlib_init_function_t * _f = VLIB_INIT_FUNCTION_SYMBOL (x); \
clib_error_t * _error = 0; \
if (! hash_get (vm->init_functions_called, _f)) \
{ \
hash_set1 (vm->init_functions_called, _f); \
_error = _f (vm); \
} \
_error; \
})
/* Don't call given init function: used to suppress parts of the netstack */
#define vlib_mark_init_function_complete(vm, x) \
({ \
extern vlib_init_function_t * VLIB_INIT_FUNCTION_SYMBOL (x); \
vlib_init_function_t * _f = VLIB_INIT_FUNCTION_SYMBOL (x); \
hash_set1 (vm->init_functions_called, _f); \
})
#define vlib_call_post_graph_init_function(vm, x) \
({ \
extern vlib_init_function_t * VLIB_POST_GRAPH_INIT_FUNCTION_SYMBOL (x); \
vlib_init_function_t * _f = VLIB_POST_GRAPH_INIT_FUNCTION_SYMBOL (x); \
clib_error_t * _error = 0; \
if (! hash_get (vm->init_functions_called, _f)) \
{ \
hash_set1 (vm->init_functions_called, _f); \
_error = _f (vm); \
} \
_error; \
})
#define vlib_call_config_function(vm, x) \
({ \
vlib_config_function_runtime_t * _r; \
clib_error_t * _error = 0; \
extern vlib_config_function_runtime_t \
VLIB_CONFIG_FUNCTION_SYMBOL (x); \
\
_r = &VLIB_CONFIG_FUNCTION_SYMBOL (x); \
if (! hash_get (vm->init_functions_called, _r->function)) \
{ \
hash_set1 (vm->init_functions_called, _r->function); \
_error = _r->function (vm, &_r->input); \
} \
_error; \
})
/* External functions. */
clib_error_t *vlib_call_all_init_functions (struct vlib_main_t *vm);
clib_error_t *vlib_call_all_config_functions (struct vlib_main_t *vm,
unformat_input_t * input,
int is_early);
clib_error_t *vlib_call_all_main_loop_enter_functions (struct vlib_main_t
*vm);
clib_error_t *vlib_call_all_main_loop_exit_functions (struct vlib_main_t *vm);
clib_error_t *vlib_call_init_exit_functions (struct vlib_main_t *vm,
_vlib_init_function_list_elt_t **
headp, int call_once);
clib_error_t *vlib_call_init_exit_functions_no_sort (struct vlib_main_t *vm,
_vlib_init_function_list_elt_t
** headp, int call_once);
clib_error_t *vlib_sort_init_exit_functions (_vlib_init_function_list_elt_t
**);
#define foreach_vlib_module_reference \
_ (node_cli) \
_ (trace_cli)
/* Dummy function to get node_cli.c linked in. */
#define _(x) void vlib_##x##_reference (void);
foreach_vlib_module_reference
#undef _
#define VLIB_INITS(...) (char*[]) { __VA_ARGS__, 0}
#endif /* included_vlib_init_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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