1 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ 2 #ifndef __BPF_HELPERS__ 3 #define __BPF_HELPERS__ 4 5 /* 6 * Note that bpf programs need to include either 7 * vmlinux.h (auto-generated from BTF) or linux/types.h 8 * in advance since bpf_helper_defs.h uses such types 9 * as __u64. 10 */ 11 #include "bpf_helper_defs.h" 12 13 #define __uint(name, val) int (*name)[val] 14 #define __type(name, val) typeof(val) *name 15 #define __array(name, val) typeof(val) *name[] 16 17 /* Helper macro to print out debug messages */ 18 #define bpf_printk(fmt, ...) \ 19 ({ \ 20 char ____fmt[] = fmt; \ 21 bpf_trace_printk(____fmt, sizeof(____fmt), \ 22 ##__VA_ARGS__); \ 23 }) 24 25 /* 26 * Helper macro to place programs, maps, license in 27 * different sections in elf_bpf file. Section names 28 * are interpreted by elf_bpf loader 29 */ 30 #define SEC(NAME) __attribute__((section(NAME), used)) 31 32 #ifndef __always_inline 33 #define __always_inline __attribute__((always_inline)) 34 #endif 35 #ifndef __weak 36 #define __weak __attribute__((weak)) 37 #endif 38 39 /* 40 * Helper structure used by eBPF C program 41 * to describe BPF map attributes to libbpf loader 42 */ 43 struct bpf_map_def { 44 unsigned int type; 45 unsigned int key_size; 46 unsigned int value_size; 47 unsigned int max_entries; 48 unsigned int map_flags; 49 }; 50 51 enum libbpf_pin_type { 52 LIBBPF_PIN_NONE, 53 /* PIN_BY_NAME: pin maps by name (in /sys/fs/bpf by default) */ 54 LIBBPF_PIN_BY_NAME, 55 }; 56 57 enum libbpf_tristate { 58 TRI_NO = 0, 59 TRI_YES = 1, 60 TRI_MODULE = 2, 61 }; 62 63 #define __kconfig __attribute__((section(".kconfig"))) 64 65 #endif 66