15981881dSAndrii Nakryiko /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ 25981881dSAndrii Nakryiko 35981881dSAndrii Nakryiko /* 45981881dSAndrii Nakryiko * Libbpf legacy APIs (either discouraged or deprecated, as mentioned in [0]) 55981881dSAndrii Nakryiko * 65981881dSAndrii Nakryiko * [0] https://docs.google.com/document/d/1UyjTZuPFWiPFyKk1tV5an11_iaRuec6U-ZESZ54nNTY 75981881dSAndrii Nakryiko * 85981881dSAndrii Nakryiko * Copyright (C) 2021 Facebook 95981881dSAndrii Nakryiko */ 105981881dSAndrii Nakryiko #ifndef __LIBBPF_LEGACY_BPF_H 115981881dSAndrii Nakryiko #define __LIBBPF_LEGACY_BPF_H 125981881dSAndrii Nakryiko 135981881dSAndrii Nakryiko #include <linux/bpf.h> 145981881dSAndrii Nakryiko #include <stdbool.h> 155981881dSAndrii Nakryiko #include <stddef.h> 165981881dSAndrii Nakryiko #include <stdint.h> 175981881dSAndrii Nakryiko #include "libbpf_common.h" 185981881dSAndrii Nakryiko 195981881dSAndrii Nakryiko #ifdef __cplusplus 205981881dSAndrii Nakryiko extern "C" { 215981881dSAndrii Nakryiko #endif 225981881dSAndrii Nakryiko 235981881dSAndrii Nakryiko enum libbpf_strict_mode { 245981881dSAndrii Nakryiko /* Turn on all supported strict features of libbpf to simulate libbpf 255981881dSAndrii Nakryiko * v1.0 behavior. 265981881dSAndrii Nakryiko * This will be the default behavior in libbpf v1.0. 275981881dSAndrii Nakryiko */ 285981881dSAndrii Nakryiko LIBBPF_STRICT_ALL = 0xffffffff, 295981881dSAndrii Nakryiko 305981881dSAndrii Nakryiko /* 315981881dSAndrii Nakryiko * Disable any libbpf 1.0 behaviors. This is the default before libbpf 325981881dSAndrii Nakryiko * v1.0. It won't be supported anymore in v1.0, please update your 335981881dSAndrii Nakryiko * code so that it handles LIBBPF_STRICT_ALL mode before libbpf v1.0. 345981881dSAndrii Nakryiko */ 355981881dSAndrii Nakryiko LIBBPF_STRICT_NONE = 0x00, 36f12b6543SAndrii Nakryiko /* 37f12b6543SAndrii Nakryiko * Return NULL pointers on error, not ERR_PTR(err). 38f12b6543SAndrii Nakryiko * Additionally, libbpf also always sets errno to corresponding Exx 39f12b6543SAndrii Nakryiko * (positive) error code. 40f12b6543SAndrii Nakryiko */ 41f12b6543SAndrii Nakryiko LIBBPF_STRICT_CLEAN_PTRS = 0x01, 42f12b6543SAndrii Nakryiko /* 43f12b6543SAndrii Nakryiko * Return actual error codes from low-level APIs directly, not just -1. 44f12b6543SAndrii Nakryiko * Additionally, libbpf also always sets errno to corresponding Exx 45f12b6543SAndrii Nakryiko * (positive) error code. 46f12b6543SAndrii Nakryiko */ 47f12b6543SAndrii Nakryiko LIBBPF_STRICT_DIRECT_ERRS = 0x02, 48dd94d45cSAndrii Nakryiko /* 49dd94d45cSAndrii Nakryiko * Enforce strict BPF program section (SEC()) names. 50dd94d45cSAndrii Nakryiko * E.g., while prefiously SEC("xdp_whatever") or SEC("perf_event_blah") were 51dd94d45cSAndrii Nakryiko * allowed, with LIBBPF_STRICT_SEC_PREFIX this will become 52dd94d45cSAndrii Nakryiko * unrecognized by libbpf and would have to be just SEC("xdp") and 53dd94d45cSAndrii Nakryiko * SEC("xdp") and SEC("perf_event"). 54a77f879bSStanislav Fomichev * 55a77f879bSStanislav Fomichev * Note, in this mode the program pin path will be based on the 56a77f879bSStanislav Fomichev * function name instead of section name. 57dd94d45cSAndrii Nakryiko */ 58dd94d45cSAndrii Nakryiko LIBBPF_STRICT_SEC_NAME = 0x04, 59689624f0SJoe Burton /* 60689624f0SJoe Burton * Disable the global 'bpf_objects_list'. Maintaining this list adds 61689624f0SJoe Burton * a race condition to bpf_object__open() and bpf_object__close(). 62689624f0SJoe Burton * Clients can maintain it on their own if it is valuable for them. 63689624f0SJoe Burton */ 64689624f0SJoe Burton LIBBPF_STRICT_NO_OBJECT_LIST = 0x08, 65e542f2c4SAndrii Nakryiko /* 66e542f2c4SAndrii Nakryiko * Automatically bump RLIMIT_MEMLOCK using setrlimit() before the 67e542f2c4SAndrii Nakryiko * first BPF program or map creation operation. This is done only if 68e542f2c4SAndrii Nakryiko * kernel is too old to support memcg-based memory accounting for BPF 69e542f2c4SAndrii Nakryiko * subsystem. By default, RLIMIT_MEMLOCK limit is set to RLIM_INFINITY, 70e542f2c4SAndrii Nakryiko * but it can be overriden with libbpf_set_memlock_rlim_max() API. 71e542f2c4SAndrii Nakryiko * Note that libbpf_set_memlock_rlim_max() needs to be called before 72e542f2c4SAndrii Nakryiko * the very first bpf_prog_load(), bpf_map_create() or bpf_object__load() 73e542f2c4SAndrii Nakryiko * operation. 74e542f2c4SAndrii Nakryiko */ 75e542f2c4SAndrii Nakryiko LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK = 0x10, 7693b8952dSAndrii Nakryiko /* 7793b8952dSAndrii Nakryiko * Error out on any SEC("maps") map definition, which are deprecated 7893b8952dSAndrii Nakryiko * in favor of BTF-defined map definitions in SEC(".maps"). 7993b8952dSAndrii Nakryiko */ 8093b8952dSAndrii Nakryiko LIBBPF_STRICT_MAP_DEFINITIONS = 0x20, 81dd94d45cSAndrii Nakryiko 825981881dSAndrii Nakryiko __LIBBPF_STRICT_LAST, 835981881dSAndrii Nakryiko }; 845981881dSAndrii Nakryiko 855981881dSAndrii Nakryiko LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode); 865981881dSAndrii Nakryiko 87be80e9cdSAndrii Nakryiko #define DECLARE_LIBBPF_OPTS LIBBPF_OPTS 885981881dSAndrii Nakryiko 89*20eccf29SAndrii Nakryiko /* "Discouraged" APIs which don't follow consistent libbpf naming patterns. 90*20eccf29SAndrii Nakryiko * They are normally a trivial aliases or wrappers for proper APIs and are 91*20eccf29SAndrii Nakryiko * left to minimize unnecessary disruption for users of libbpf. But they 92*20eccf29SAndrii Nakryiko * shouldn't be used going forward. 93*20eccf29SAndrii Nakryiko */ 94*20eccf29SAndrii Nakryiko 95*20eccf29SAndrii Nakryiko struct bpf_program; 96*20eccf29SAndrii Nakryiko struct bpf_map; 97*20eccf29SAndrii Nakryiko struct btf; 98*20eccf29SAndrii Nakryiko struct btf_ext; 99*20eccf29SAndrii Nakryiko 100*20eccf29SAndrii Nakryiko LIBBPF_API enum bpf_prog_type bpf_program__get_type(const struct bpf_program *prog); 101*20eccf29SAndrii Nakryiko LIBBPF_API enum bpf_attach_type bpf_program__get_expected_attach_type(const struct bpf_program *prog); 102*20eccf29SAndrii Nakryiko LIBBPF_API const char *bpf_map__get_pin_path(const struct bpf_map *map); 103*20eccf29SAndrii Nakryiko LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size); 104*20eccf29SAndrii Nakryiko LIBBPF_API const void *btf_ext__get_raw_data(const struct btf_ext *btf_ext, __u32 *size); 105*20eccf29SAndrii Nakryiko 1065981881dSAndrii Nakryiko #ifdef __cplusplus 1075981881dSAndrii Nakryiko } /* extern "C" */ 1085981881dSAndrii Nakryiko #endif 1095981881dSAndrii Nakryiko 1105981881dSAndrii Nakryiko #endif /* __LIBBPF_LEGACY_BPF_H */ 111