1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ 3 4 #ifndef __BPF_TOOL_H 5 #define __BPF_TOOL_H 6 7 /* BFD and kernel.h both define GCC_VERSION, differently */ 8 #undef GCC_VERSION 9 #include <stdbool.h> 10 #include <stdio.h> 11 #include <linux/bpf.h> 12 #include <linux/compiler.h> 13 #include <linux/kernel.h> 14 #include <tools/libc_compat.h> 15 16 #include <bpf/hashmap.h> 17 #include <bpf/libbpf.h> 18 19 #include "json_writer.h" 20 21 /* Make sure we do not use kernel-only integer typedefs */ 22 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64 23 24 static inline __u64 ptr_to_u64(const void *ptr) 25 { 26 return (__u64)(unsigned long)ptr; 27 } 28 29 static inline void *u64_to_ptr(__u64 ptr) 30 { 31 return (void *)(unsigned long)ptr; 32 } 33 34 #define NEXT_ARG() ({ argc--; argv++; if (argc < 0) usage(); }) 35 #define NEXT_ARGP() ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); }) 36 #define BAD_ARG() ({ p_err("what is '%s'?", *argv); -1; }) 37 #define GET_ARG() ({ argc--; *argv++; }) 38 #define REQ_ARGS(cnt) \ 39 ({ \ 40 int _cnt = (cnt); \ 41 bool _res; \ 42 \ 43 if (argc < _cnt) { \ 44 p_err("'%s' needs at least %d arguments, %d found", \ 45 argv[-1], _cnt, argc); \ 46 _res = false; \ 47 } else { \ 48 _res = true; \ 49 } \ 50 _res; \ 51 }) 52 53 #define ERR_MAX_LEN 1024 54 55 #define BPF_TAG_FMT "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" 56 57 #define HELP_SPEC_PROGRAM \ 58 "PROG := { id PROG_ID | pinned FILE | tag PROG_TAG | name PROG_NAME }" 59 #define HELP_SPEC_OPTIONS \ 60 "OPTIONS := { {-j|--json} [{-p|--pretty}] | {-d|--debug} | {-l|--legacy}" 61 #define HELP_SPEC_MAP \ 62 "MAP := { id MAP_ID | pinned FILE | name MAP_NAME }" 63 #define HELP_SPEC_LINK \ 64 "LINK := { id LINK_ID | pinned FILE }" 65 66 extern const char * const prog_type_name[]; 67 extern const size_t prog_type_name_size; 68 69 extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE]; 70 71 extern const char * const map_type_name[]; 72 extern const size_t map_type_name_size; 73 74 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */ 75 enum bpf_obj_type { 76 BPF_OBJ_UNKNOWN, 77 BPF_OBJ_PROG, 78 BPF_OBJ_MAP, 79 BPF_OBJ_LINK, 80 BPF_OBJ_BTF, 81 }; 82 83 extern const char *bin_name; 84 85 extern json_writer_t *json_wtr; 86 extern bool json_output; 87 extern bool show_pinned; 88 extern bool show_pids; 89 extern bool block_mount; 90 extern bool verifier_logs; 91 extern bool relaxed_maps; 92 extern bool use_loader; 93 extern bool legacy_libbpf; 94 extern struct btf *base_btf; 95 extern struct hashmap *refs_table; 96 97 void __printf(1, 2) p_err(const char *fmt, ...); 98 void __printf(1, 2) p_info(const char *fmt, ...); 99 100 bool is_prefix(const char *pfx, const char *str); 101 int detect_common_prefix(const char *arg, ...); 102 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep); 103 void usage(void) __noreturn; 104 105 void set_max_rlimit(void); 106 107 int mount_tracefs(const char *target); 108 109 struct obj_ref { 110 int pid; 111 char comm[16]; 112 }; 113 114 struct obj_refs { 115 int ref_cnt; 116 struct obj_ref *refs; 117 }; 118 119 struct btf; 120 struct bpf_line_info; 121 122 int build_pinned_obj_table(struct hashmap *table, 123 enum bpf_obj_type type); 124 void delete_pinned_obj_table(struct hashmap *table); 125 __weak int build_obj_refs_table(struct hashmap **table, 126 enum bpf_obj_type type); 127 __weak void delete_obj_refs_table(struct hashmap *table); 128 __weak void emit_obj_refs_json(struct hashmap *table, __u32 id, 129 json_writer_t *json_wtr); 130 __weak void emit_obj_refs_plain(struct hashmap *table, __u32 id, 131 const char *prefix); 132 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 133 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 134 135 struct cmd { 136 const char *cmd; 137 int (*func)(int argc, char **argv); 138 }; 139 140 int cmd_select(const struct cmd *cmds, int argc, char **argv, 141 int (*help)(int argc, char **argv)); 142 143 int get_fd_type(int fd); 144 const char *get_fd_type_name(enum bpf_obj_type type); 145 char *get_fdinfo(int fd, const char *key); 146 int open_obj_pinned(const char *path, bool quiet); 147 int open_obj_pinned_any(const char *path, enum bpf_obj_type exp_type); 148 int mount_bpffs_for_pin(const char *name); 149 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***)); 150 int do_pin_fd(int fd, const char *name); 151 152 /* commands available in bootstrap mode */ 153 int do_gen(int argc, char **argv); 154 int do_btf(int argc, char **argv); 155 156 /* non-bootstrap only commands */ 157 int do_prog(int argc, char **arg) __weak; 158 int do_map(int argc, char **arg) __weak; 159 int do_link(int argc, char **arg) __weak; 160 int do_event_pipe(int argc, char **argv) __weak; 161 int do_cgroup(int argc, char **arg) __weak; 162 int do_perf(int argc, char **arg) __weak; 163 int do_net(int argc, char **arg) __weak; 164 int do_tracelog(int argc, char **arg) __weak; 165 int do_feature(int argc, char **argv) __weak; 166 int do_struct_ops(int argc, char **argv) __weak; 167 int do_iter(int argc, char **argv) __weak; 168 169 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what); 170 int prog_parse_fd(int *argc, char ***argv); 171 int prog_parse_fds(int *argc, char ***argv, int **fds); 172 int map_parse_fd(int *argc, char ***argv); 173 int map_parse_fds(int *argc, char ***argv, int **fds); 174 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len); 175 176 struct bpf_prog_linfo; 177 #ifdef HAVE_LIBBFD_SUPPORT 178 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 179 const char *arch, const char *disassembler_options, 180 const struct btf *btf, 181 const struct bpf_prog_linfo *prog_linfo, 182 __u64 func_ksym, unsigned int func_idx, 183 bool linum); 184 int disasm_init(void); 185 #else 186 static inline 187 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 188 const char *arch, const char *disassembler_options, 189 const struct btf *btf, 190 const struct bpf_prog_linfo *prog_linfo, 191 __u64 func_ksym, unsigned int func_idx, 192 bool linum) 193 { 194 } 195 static inline int disasm_init(void) 196 { 197 p_err("No libbfd support"); 198 return -1; 199 } 200 #endif 201 void print_data_json(uint8_t *data, size_t len); 202 void print_hex_data_json(uint8_t *data, size_t len); 203 204 unsigned int get_page_size(void); 205 unsigned int get_possible_cpus(void); 206 const char * 207 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino, 208 const char **opt); 209 210 struct btf_dumper { 211 const struct btf *btf; 212 json_writer_t *jw; 213 bool is_plain_text; 214 bool prog_id_as_func_ptr; 215 }; 216 217 /* btf_dumper_type - print data along with type information 218 * @d: an instance containing context for dumping types 219 * @type_id: index in btf->types array. this points to the type to be dumped 220 * @data: pointer the actual data, i.e. the values to be printed 221 * 222 * Returns zero on success and negative error code otherwise 223 */ 224 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id, 225 const void *data); 226 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id, 227 char *func_only, int size); 228 229 void btf_dump_linfo_plain(const struct btf *btf, 230 const struct bpf_line_info *linfo, 231 const char *prefix, bool linum); 232 void btf_dump_linfo_json(const struct btf *btf, 233 const struct bpf_line_info *linfo, bool linum); 234 235 struct nlattr; 236 struct ifinfomsg; 237 struct tcmsg; 238 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb); 239 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind, 240 const char *devname, int ifindex); 241 242 int print_all_levels(__maybe_unused enum libbpf_print_level level, 243 const char *format, va_list args); 244 245 size_t hash_fn_for_key_as_id(const void *key, void *ctx); 246 bool equal_fn_for_key_as_id(const void *k1, const void *k2, void *ctx); 247 248 static inline void *u32_as_hash_field(__u32 x) 249 { 250 return (void *)(uintptr_t)x; 251 } 252 253 static inline __u32 hash_field_as_u32(const void *x) 254 { 255 return (__u32)(uintptr_t)x; 256 } 257 258 static inline bool hashmap__empty(struct hashmap *map) 259 { 260 return map ? hashmap__size(map) == 0 : true; 261 } 262 263 #endif 264