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/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
/*
* common eBPF ELF operations.
*
* Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
* Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
* Copyright (C) 2015 Huawei Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses>
*/
#ifndef __LIBBPF_BPF_H
#define __LIBBPF_BPF_H
#include <linux/bpf.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "libbpf_common.h"
#ifdef __cplusplus
extern "C" {
#endif
struct bpf_create_map_attr {
const char *name;
enum bpf_map_type map_type;
__u32 map_flags;
__u32 key_size;
__u32 value_size;
__u32 max_entries;
__u32 numa_node;
__u32 btf_fd;
__u32 btf_key_type_id;
__u32 btf_value_type_id;
__u32 map_ifindex;
union {
__u32 inner_map_fd;
__u32 btf_vmlinux_value_type_id;
};
};
LIBBPF_API int
bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
int key_size, int value_size,
int max_entries, __u32 map_flags, int node);
LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name,
int key_size, int value_size,
int max_entries, __u32 map_flags);
LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size,
int value_size, int max_entries, __u32 map_flags);
LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type,
const char *name, int key_size,
int inner_map_fd, int max_entries,
__u32 map_flags, int node);
LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type,
const char *name, int key_size,
int inner_map_fd, int max_entries,
__u32 map_flags);
struct bpf_load_program_attr {
enum bpf_prog_type prog_type;
enum bpf_attach_type expected_attach_type;
const char *name;
const struct bpf_insn *insns;
size_t insns_cnt;
const char *license;
union {
__u32 kern_version;
__u32 attach_prog_fd;
};
union {
__u32 prog_ifindex;
__u32 attach_btf_id;
};
__u32 prog_btf_fd;
__u32 func_info_rec_size;
const void *func_info;
__u32 func_info_cnt;
__u32 line_info_rec_size;
const void *line_info;
__u32 line_info_cnt;
__u32 log_level;
__u32 prog_flags;
};
/* Flags to direct loading requirements */
#define MAPS_RELAX_COMPAT 0x01
/* Recommend log buffer size */
#define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */
LIBBPF_API int
bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
char *log_buf, size_t log_buf_sz);
LIBBPF_API int bpf_load_program(enum bpf_prog_type type,
const struct bpf_insn *insns, size_t insns_cnt,
const char *license, __u32 kern_version,
char *log_buf, size_t log_buf_sz);
LIBBPF_API int bpf_verify_program(enum bpf_prog_type type,
const struct bpf_insn *insns,
size_t insns_cnt, __u32 prog_flags,
const char *license, __u32 kern_version,
char *log_buf, size_t log_buf_sz,
int log_level);
LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
__u64 flags);
LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value,
__u64 flags);
LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
void *value);
LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
LIBBPF_API int bpf_map_freeze(int fd);
struct bpf_map_batch_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u64 elem_flags;
__u64 flags;
};
#define bpf_map_batch_opts__last_field flags
LIBBPF_API int bpf_map_delete_batch(int fd, void *keys,
__u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch,
void *keys, void *values, __u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_lookup_and_delete_batch(int fd, void *in_batch,
void *out_batch, void *keys,
void *values, __u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_map_update_batch(int fd, void *keys, void *values,
__u32 *count,
const struct bpf_map_batch_opts *opts);
LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
LIBBPF_API int bpf_obj_get(const char *pathname);
struct bpf_prog_attach_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
unsigned int flags;
int replace_prog_fd;
};
#define bpf_prog_attach_opts__last_field replace_prog_fd
LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
enum bpf_attach_type type, unsigned int flags);
LIBBPF_API int bpf_prog_attach_xattr(int prog_fd, int attachable_fd,
enum bpf_attach_type type,
const struct bpf_prog_attach_opts *opts);
LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
enum bpf_attach_type type);
union bpf_iter_link_info; /* defined in up-to-date linux/bpf.h */
struct bpf_link_create_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u32 flags;
union bpf_iter_link_info *iter_info;
__u32 iter_info_len;
__u32 target_btf_id;
};
#define bpf_link_create_opts__last_field target_btf_id
LIBBPF_API int bpf_link_create(int prog_fd, int target_fd,
enum bpf_attach_type attach_type,
const struct bpf_link_create_opts *opts);
LIBBPF_API int bpf_link_detach(int link_fd);
struct bpf_link_update_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u32 flags; /* extra flags */
__u32 old_prog_fd; /* expected old program FD */
};
#define bpf_link_update_opts__last_field old_prog_fd
LIBBPF_API int bpf_link_update(int link_fd, int new_prog_fd,
const struct bpf_link_update_opts *opts);
LIBBPF_API int bpf_iter_create(int link_fd);
struct bpf_prog_test_run_attr {
int prog_fd;
int repeat;
const void *data_in;
__u32 data_size_in;
void *data_out; /* optional */
__u32 data_size_out; /* in: max length of data_out
* out: length of data_out */
__u32 retval; /* out: return code of the BPF program */
__u32 duration; /* out: average per repetition in ns */
const void *ctx_in; /* optional */
__u32 ctx_size_in;
void *ctx_out; /* optional */
__u32 ctx_size_out; /* in: max length of ctx_out
* out: length of cxt_out */
};
LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr);
/*
* bpf_prog_test_run does not check that data_out is large enough. Consider
* using bpf_prog_test_run_xattr instead.
*/
LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
__u32 size, void *data_out, __u32 *size_out,
__u32 *retval, __u32 *duration);
LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_link_get_next_id(__u32 start_id, __u32 *next_id);
LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_link_get_fd_by_id(__u32 id);
LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len);
LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
__u32 query_flags, __u32 *attach_flags,
__u32 *prog_ids, __u32 *prog_cnt);
LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
LIBBPF_API int bpf_load_btf(const void *btf, __u32 btf_size, char *log_buf,
__u32 log_buf_size, bool do_log);
LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
__u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
__u64 *probe_offset, __u64 *probe_addr);
#ifdef __cplusplus
/* forward-declaring enums in C++ isn't compatible with pure C enums, so
* instead define bpf_enable_stats() as accepting int as an input
*/
LIBBPF_API int bpf_enable_stats(int type);
#else
enum bpf_stats_type; /* defined in up-to-date linux/bpf.h */
LIBBPF_API int bpf_enable_stats(enum bpf_stats_type type);
#endif
struct bpf_prog_bind_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u32 flags;
};
#define bpf_prog_bind_opts__last_field flags
LIBBPF_API int bpf_prog_bind_map(int prog_fd, int map_fd,
const struct bpf_prog_bind_opts *opts);
struct bpf_test_run_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
const void *data_in; /* optional */
void *data_out; /* optional */
__u32 data_size_in;
__u32 data_size_out; /* in: max length of data_out
* out: length of data_out
*/
const void *ctx_in; /* optional */
void *ctx_out; /* optional */
__u32 ctx_size_in;
__u32 ctx_size_out; /* in: max length of ctx_out
* out: length of cxt_out
*/
__u32 retval; /* out: return code of the BPF program */
int repeat;
__u32 duration; /* out: average per repetition in ns */
__u32 flags;
__u32 cpu;
};
#define bpf_test_run_opts__last_field cpu
LIBBPF_API int bpf_prog_test_run_opts(int prog_fd,
struct bpf_test_run_opts *opts);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __LIBBPF_BPF_H */
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