105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
|
|
* Common eBPF ELF object loading operations.
|
|
*
|
|
* Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
|
|
* Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
|
|
* Copyright (C) 2015 Huawei Inc.
|
|
*/
|
|
#ifndef __BPF_LIBBPF_H
|
|
#define __BPF_LIBBPF_H
|
|
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include <linux/err.h>
|
|
|
|
enum libbpf_errno {
|
|
__LIBBPF_ERRNO__START = 4000,
|
|
|
|
/* Something wrong in libelf */
|
|
LIBBPF_ERRNO__LIBELF = __LIBBPF_ERRNO__START,
|
|
LIBBPF_ERRNO__FORMAT, /* BPF object format invalid */
|
|
LIBBPF_ERRNO__KVERSION, /* Incorrect or no 'version' section */
|
|
LIBBPF_ERRNO__ENDIAN, /* Endian missmatch */
|
|
LIBBPF_ERRNO__INTERNAL, /* Internal error in libbpf */
|
|
LIBBPF_ERRNO__RELOC, /* Relocation failed */
|
|
LIBBPF_ERRNO__LOAD, /* Load program failure for unknown reason */
|
|
LIBBPF_ERRNO__VERIFY, /* Kernel verifier blocks program loading */
|
|
LIBBPF_ERRNO__PROG2BIG, /* Program too big */
|
|
LIBBPF_ERRNO__KVER, /* Incorrect kernel version */
|
|
__LIBBPF_ERRNO__END,
|
|
};
|
|
|
|
int libbpf_strerror(int err, char *buf, size_t size);
|
|
|
|
/*
|
|
* In include/linux/compiler-gcc.h, __printf is defined. However
|
|
* it should be better if libbpf.h doesn't depend on Linux header file.
|
|
* So instead of __printf, here we use gcc attribute directly.
|
|
*/
|
|
typedef int (*libbpf_print_fn_t)(const char *, ...)
|
|
__attribute__((format(printf, 1, 2)));
|
|
|
|
void libbpf_set_print(libbpf_print_fn_t warn,
|
|
libbpf_print_fn_t info,
|
|
libbpf_print_fn_t debug);
|
|
|
|
/* Hide internal to user */
|
|
struct bpf_object;
|
|
|
|
struct bpf_object *bpf_object__open(const char *path);
|
|
struct bpf_object *bpf_object__open_buffer(void *obj_buf,
|
|
size_t obj_buf_sz,
|
|
const char *name);
|
|
void bpf_object__close(struct bpf_object *object);
|
|
|
|
/* Load/unload object into/from kernel */
|
|
int bpf_object__load(struct bpf_object *obj);
|
|
int bpf_object__unload(struct bpf_object *obj);
|
|
const char *bpf_object__get_name(struct bpf_object *obj);
|
|
unsigned int bpf_object__get_kversion(struct bpf_object *obj);
|
|
|
|
struct bpf_object *bpf_object__next(struct bpf_object *prev);
|
|
#define bpf_object__for_each_safe(pos, tmp) \
|
|
for ((pos) = bpf_object__next(NULL), \
|
|
(tmp) = bpf_object__next(pos); \
|
|
(pos) != NULL; \
|
|
(pos) = (tmp), (tmp) = bpf_object__next(tmp))
|
|
|
|
/* Accessors of bpf_program. */
|
|
struct bpf_program;
|
|
struct bpf_program *bpf_program__next(struct bpf_program *prog,
|
|
struct bpf_object *obj);
|
|
|
|
#define bpf_object__for_each_program(pos, obj) \
|
|
for ((pos) = bpf_program__next(NULL, (obj)); \
|
|
(pos) != NULL; \
|
|
(pos) = bpf_program__next((pos), (obj)))
|
|
|
|
typedef void (*bpf_program_clear_priv_t)(struct bpf_program *,
|
|
void *);
|
|
|
|
int bpf_program__set_private(struct bpf_program *prog, void *priv,
|
|
bpf_program_clear_priv_t clear_priv);
|
|
|
|
int bpf_program__get_private(struct bpf_program *prog,
|
|
void **ppriv);
|
|
|
|
const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);
|
|
|
|
int bpf_program__fd(struct bpf_program *prog);
|
|
|
|
/*
|
|
* We don't need __attribute__((packed)) now since it is
|
|
* unnecessary for 'bpf_map_def' because they are all aligned.
|
|
* In addition, using it will trigger -Wpacked warning message,
|
|
* and will be treated as an error due to -Werror.
|
|
*/
|
|
struct bpf_map_def {
|
|
unsigned int type;
|
|
unsigned int key_size;
|
|
unsigned int value_size;
|
|
unsigned int max_entries;
|
|
};
|
|
|
|
#endif
|