/
githubmirror
/
iproute2
Обзор
Документация
Войти
/
githubmirror
/
iproute2
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
v6.2.0
include/bpf_util.h
330 строк
8 KB
Hangbin Liu
libbpf: add xdp program name support
08 июл 2022, 18:09
08 июл 2022, 18:09
77b3a84
Код
Авторство
О чём код?
/* * bpf_util.h BPF common code * * This program is free software; you can distribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * Authors: Daniel Borkmann <daniel@iogearbox.net> * Jiri Pirko <jiri@resnulli.us> */ #ifndef __BPF_UTIL__ #define __BPF_UTIL__ #include <linux/bpf.h> #include <linux/btf.h> #include <linux/filter.h> #include <linux/magic.h> #include <linux/elf-em.h> #include <linux/if_alg.h> #include "utils.h" #include "bpf_scm.h" #define BPF_ENV_UDS "TC_BPF_UDS" #define BPF_ENV_MNT "TC_BPF_MNT" #ifndef BPF_MAX_LOG # define BPF_MAX_LOG 4096 #endif #define BPF_DIR_GLOBALS "globals" #ifndef BPF_FS_MAGIC # define BPF_FS_MAGIC 0xcafe4a11 #endif #define BPF_DIR_MNT "/sys/fs/bpf" #ifndef TRACEFS_MAGIC # define TRACEFS_MAGIC 0x74726163 #endif #define TRACE_DIR_MNT "/sys/kernel/tracing" #ifndef AF_ALG # define AF_ALG 38 #endif #ifndef EM_BPF # define EM_BPF 247 #endif struct bpf_cfg_ops { void (*cbpf_cb)(void *nl, const struct sock_filter *ops, int ops_len); void (*ebpf_cb)(void *nl, int fd, const char *annotation); }; enum bpf_mode { CBPF_BYTECODE, CBPF_FILE, EBPF_OBJECT, EBPF_PINNED, BPF_MODE_MAX, }; struct bpf_cfg_in { const char *object; const char *section; const char *prog_name; const char *uds; enum bpf_prog_type type; enum bpf_mode mode; __u32 ifindex; bool verbose; int argc; char **argv; struct sock_filter opcodes[BPF_MAXINSNS]; union { int n_opcodes; int prog_fd; }; }; /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */ #define BPF_ALU64_REG(OP, DST, SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 }) #define BPF_ALU32_REG(OP, DST, SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 }) /* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */ #define BPF_ALU64_IMM(OP, DST, IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM }) #define BPF_ALU32_IMM(OP, DST, IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM }) /* Short form of mov, dst_reg = src_reg */ #define BPF_MOV64_REG(DST, SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_MOV | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 }) #define BPF_MOV32_REG(DST, SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_MOV | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 }) /* Short form of mov, dst_reg = imm32 */ #define BPF_MOV64_IMM(DST, IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_MOV | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM }) #define BPF_MOV32_IMM(DST, IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_MOV | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM }) /* BPF_LD_IMM64 macro encodes single 'load 64-bit immediate' insn */ #define BPF_LD_IMM64(DST, IMM) \ BPF_LD_IMM64_RAW(DST, 0, IMM) #define BPF_LD_IMM64_RAW(DST, SRC, IMM) \ ((struct bpf_insn) { \ .code = BPF_LD | BPF_DW | BPF_IMM, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = (__u32) (IMM) }), \ ((struct bpf_insn) { \ .code = 0, /* zero is reserved opcode */ \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = ((__u64) (IMM)) >> 32 }) #ifndef BPF_PSEUDO_MAP_FD # define BPF_PSEUDO_MAP_FD 1 #endif /* pseudo BPF_LD_IMM64 insn used to refer to process-local map_fd */ #define BPF_LD_MAP_FD(DST, MAP_FD) \ BPF_LD_IMM64_RAW(DST, BPF_PSEUDO_MAP_FD, MAP_FD) /* Direct packet access, R0 = *(uint *) (skb->data + imm32) */ #define BPF_LD_ABS(SIZE, IMM) \ ((struct bpf_insn) { \ .code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = IMM }) /* Memory load, dst_reg = *(uint *) (src_reg + off16) */ #define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \ ((struct bpf_insn) { \ .code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 }) /* Memory store, *(uint *) (dst_reg + off16) = src_reg */ #define BPF_STX_MEM(SIZE, DST, SRC, OFF) \ ((struct bpf_insn) { \ .code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 }) /* Memory store, *(uint *) (dst_reg + off16) = imm32 */ #define BPF_ST_MEM(SIZE, DST, OFF, IMM) \ ((struct bpf_insn) { \ .code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \ .dst_reg = DST, \ .src_reg = 0, \ .off = OFF, \ .imm = IMM }) /* Conditional jumps against registers, if (dst_reg 'op' src_reg) goto pc + off16 */ #define BPF_JMP_REG(OP, DST, SRC, OFF) \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 }) /* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */ #define BPF_JMP_IMM(OP, DST, IMM, OFF) \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = OFF, \ .imm = IMM }) /* Raw code statement block */ #define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \ ((struct bpf_insn) { \ .code = CODE, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = IMM }) /* Program exit */ #define BPF_EXIT_INSN() \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_EXIT, \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = 0 }) int bpf_parse_common(struct bpf_cfg_in *cfg, const struct bpf_cfg_ops *ops); int bpf_load_common(struct bpf_cfg_in *cfg, const struct bpf_cfg_ops *ops, void *nl); int bpf_parse_and_load_common(struct bpf_cfg_in *cfg, const struct bpf_cfg_ops *ops, void *nl); const char *bpf_prog_to_default_section(enum bpf_prog_type type); int bpf_graft_map(const char *map_path, uint32_t *key, int argc, char **argv); int bpf_trace_pipe(void); void bpf_print_ops(struct rtattr *bpf_ops, __u16 len); int bpf_prog_load_dev(enum bpf_prog_type type, const struct bpf_insn *insns, size_t size_insns, const char *license, __u32 ifindex, char *log, size_t size_log); int bpf_program_load(enum bpf_prog_type type, const struct bpf_insn *insns, size_t size_insns, const char *license, char *log, size_t size_log); int bpf_prog_attach_fd(int prog_fd, int target_fd, enum bpf_attach_type type); int bpf_prog_detach_fd(int target_fd, enum bpf_attach_type type); int bpf_program_attach(int prog_fd, int target_fd, enum bpf_attach_type type); int bpf_dump_prog_info(FILE *f, uint32_t id); int bpf(int cmd, union bpf_attr *attr, unsigned int size); #ifdef HAVE_ELF int bpf_send_map_fds(const char *path, const char *obj); int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux, unsigned int entries); #ifdef HAVE_LIBBPF int iproute2_bpf_elf_ctx_init(struct bpf_cfg_in *cfg); int iproute2_bpf_fetch_ancillary(void); int iproute2_get_root_path(char *root_path, size_t len); bool iproute2_is_pin_map(const char *libbpf_map_name, char *pathname); bool iproute2_is_map_in_map(const char *libbpf_map_name, struct bpf_elf_map *imap, struct bpf_elf_map *omap, char *omap_name); int iproute2_find_map_name_by_id(unsigned int map_id, char *name); int iproute2_load_libbpf(struct bpf_cfg_in *cfg); #endif /* HAVE_LIBBPF */ #else static inline int bpf_send_map_fds(const char *path, const char *obj) { return 0; } static inline int bpf_recv_map_fds(const char *path, int *fds, struct bpf_map_aux *aux, unsigned int entries) { return -1; } #ifdef HAVE_LIBBPF static inline int iproute2_load_libbpf(struct bpf_cfg_in *cfg) { fprintf(stderr, "No ELF library support compiled in.\n"); return -1; } #endif /* HAVE_LIBBPF */ #endif /* HAVE_ELF */ const char *get_libbpf_version(void); #endif /* __BPF_UTIL__ */