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