/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ /* * common eBPF ELF operations. * * Copyright (C) 2013-2015 Alexei Starovoitov * Copyright (C) 2015 Wang Nan * 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 */ #ifndef __LIBBPF_BPF_H #define __LIBBPF_BPF_H #include #include #include #include #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_lookup_and_delete_elem_flags(int fd, const void *key, void *value, __u64 flags); 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; union { struct { __u64 bpf_cookie; } perf_event; }; size_t :0; }; #define bpf_link_create_opts__last_field perf_event 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 */