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 <stdlib.h> 12 #include <linux/bpf.h> 13 #include <linux/compiler.h> 14 #include <linux/kernel.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}" 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 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */ 67 enum bpf_obj_type { 68 BPF_OBJ_UNKNOWN, 69 BPF_OBJ_PROG, 70 BPF_OBJ_MAP, 71 BPF_OBJ_LINK, 72 BPF_OBJ_BTF, 73 }; 74 75 extern const char *bin_name; 76 77 extern json_writer_t *json_wtr; 78 extern bool json_output; 79 extern bool show_pinned; 80 extern bool show_pids; 81 extern bool block_mount; 82 extern bool verifier_logs; 83 extern bool relaxed_maps; 84 extern bool use_loader; 85 extern struct btf *base_btf; 86 extern struct hashmap *refs_table; 87 88 void __printf(1, 2) p_err(const char *fmt, ...); 89 void __printf(1, 2) p_info(const char *fmt, ...); 90 91 bool is_prefix(const char *pfx, const char *str); 92 int detect_common_prefix(const char *arg, ...); 93 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep); 94 void usage(void) __noreturn; 95 96 void set_max_rlimit(void); 97 98 int mount_tracefs(const char *target); 99 100 struct obj_ref { 101 int pid; 102 char comm[16]; 103 }; 104 105 struct obj_refs { 106 int ref_cnt; 107 bool has_bpf_cookie; 108 struct obj_ref *refs; 109 __u64 bpf_cookie; 110 }; 111 112 struct btf; 113 struct bpf_line_info; 114 115 int build_pinned_obj_table(struct hashmap *table, 116 enum bpf_obj_type type); 117 void delete_pinned_obj_table(struct hashmap *table); 118 __weak int build_obj_refs_table(struct hashmap **table, 119 enum bpf_obj_type type); 120 __weak void delete_obj_refs_table(struct hashmap *table); 121 __weak void emit_obj_refs_json(struct hashmap *table, __u32 id, 122 json_writer_t *json_wtr); 123 __weak void emit_obj_refs_plain(struct hashmap *table, __u32 id, 124 const char *prefix); 125 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 126 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 127 128 struct cmd { 129 const char *cmd; 130 int (*func)(int argc, char **argv); 131 }; 132 133 int cmd_select(const struct cmd *cmds, int argc, char **argv, 134 int (*help)(int argc, char **argv)); 135 136 #define MAX_PROG_FULL_NAME 128 137 void get_prog_full_name(const struct bpf_prog_info *prog_info, int prog_fd, 138 char *name_buff, size_t buff_len); 139 140 int get_fd_type(int fd); 141 const char *get_fd_type_name(enum bpf_obj_type type); 142 char *get_fdinfo(int fd, const char *key); 143 int open_obj_pinned(const char *path, bool quiet); 144 int open_obj_pinned_any(const char *path, enum bpf_obj_type exp_type); 145 int mount_bpffs_for_pin(const char *name); 146 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***)); 147 int do_pin_fd(int fd, const char *name); 148 149 /* commands available in bootstrap mode */ 150 int do_gen(int argc, char **argv); 151 int do_btf(int argc, char **argv); 152 153 /* non-bootstrap only commands */ 154 int do_prog(int argc, char **arg) __weak; 155 int do_map(int argc, char **arg) __weak; 156 int do_link(int argc, char **arg) __weak; 157 int do_event_pipe(int argc, char **argv) __weak; 158 int do_cgroup(int argc, char **arg) __weak; 159 int do_perf(int argc, char **arg) __weak; 160 int do_net(int argc, char **arg) __weak; 161 int do_tracelog(int argc, char **arg) __weak; 162 int do_feature(int argc, char **argv) __weak; 163 int do_struct_ops(int argc, char **argv) __weak; 164 int do_iter(int argc, char **argv) __weak; 165 166 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what); 167 int prog_parse_fd(int *argc, char ***argv); 168 int prog_parse_fds(int *argc, char ***argv, int **fds); 169 int map_parse_fd(int *argc, char ***argv); 170 int map_parse_fds(int *argc, char ***argv, int **fds); 171 int map_parse_fd_and_info(int *argc, char ***argv, struct bpf_map_info *info, 172 __u32 *info_len); 173 174 struct bpf_prog_linfo; 175 #if defined(HAVE_LLVM_SUPPORT) || defined(HAVE_LIBBFD_SUPPORT) 176 int disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 177 const char *arch, const char *disassembler_options, 178 const struct btf *btf, 179 const struct bpf_prog_linfo *prog_linfo, 180 __u64 func_ksym, unsigned int func_idx, 181 bool linum); 182 int disasm_init(void); 183 #else 184 static inline 185 int disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 186 const char *arch, const char *disassembler_options, 187 const struct btf *btf, 188 const struct bpf_prog_linfo *prog_linfo, 189 __u64 func_ksym, unsigned int func_idx, 190 bool linum) 191 { 192 return 0; 193 } 194 static inline int disasm_init(void) 195 { 196 p_err("No JIT disassembly support"); 197 return -1; 198 } 199 #endif 200 void print_data_json(uint8_t *data, size_t len); 201 void print_hex_data_json(uint8_t *data, size_t len); 202 203 unsigned int get_page_size(void); 204 unsigned int get_possible_cpus(void); 205 const char * 206 ifindex_to_arch(__u32 ifindex, __u64 ns_dev, __u64 ns_ino, const char **opt); 207 208 struct btf_dumper { 209 const struct btf *btf; 210 json_writer_t *jw; 211 bool is_plain_text; 212 bool prog_id_as_func_ptr; 213 }; 214 215 /* btf_dumper_type - print data along with type information 216 * @d: an instance containing context for dumping types 217 * @type_id: index in btf->types array. this points to the type to be dumped 218 * @data: pointer the actual data, i.e. the values to be printed 219 * 220 * Returns zero on success and negative error code otherwise 221 */ 222 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id, 223 const void *data); 224 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id, 225 char *func_only, int size); 226 227 void btf_dump_linfo_plain(const struct btf *btf, 228 const struct bpf_line_info *linfo, 229 const char *prefix, bool linum); 230 void btf_dump_linfo_json(const struct btf *btf, 231 const struct bpf_line_info *linfo, bool linum); 232 void btf_dump_linfo_dotlabel(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(long key, void *ctx); 246 bool equal_fn_for_key_as_id(long k1, long k2, void *ctx); 247 248 /* bpf_attach_type_input_str - convert the provided attach type value into a 249 * textual representation that we accept for input purposes. 250 * 251 * This function is similar in nature to libbpf_bpf_attach_type_str, but 252 * recognizes some attach type names that have been used by the program in the 253 * past and which do not follow the string inference scheme that libbpf uses. 254 * These textual representations should only be used for user input. 255 * 256 * @t: The attach type 257 * Returns a pointer to a static string identifying the attach type. NULL is 258 * returned for unknown bpf_attach_type values. 259 */ 260 const char *bpf_attach_type_input_str(enum bpf_attach_type t); 261 262 static inline bool hashmap__empty(struct hashmap *map) 263 { 264 return map ? hashmap__size(map) == 0 : true; 265 } 266 267 int pathname_concat(char *buf, int buf_sz, const char *path, 268 const char *name); 269 270 /* print netfilter bpf_link info */ 271 void netfilter_dump_plain(const struct bpf_link_info *info); 272 void netfilter_dump_json(const struct bpf_link_info *info, json_writer_t *wtr); 273 #endif 274