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 <linux/hashtable.h> 15 #include <tools/libc_compat.h> 16 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}] | {-f|--bpffs} |\n" \ 61 "\t {-m|--mapcompat} | {-n|--nomount} }" 62 #define HELP_SPEC_MAP \ 63 "MAP := { id MAP_ID | pinned FILE | name MAP_NAME }" 64 #define HELP_SPEC_LINK \ 65 "LINK := { id LINK_ID | pinned FILE }" 66 67 extern const char * const prog_type_name[]; 68 extern const size_t prog_type_name_size; 69 70 extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE]; 71 72 extern const char * const map_type_name[]; 73 extern const size_t map_type_name_size; 74 75 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */ 76 enum bpf_obj_type { 77 BPF_OBJ_UNKNOWN, 78 BPF_OBJ_PROG, 79 BPF_OBJ_MAP, 80 BPF_OBJ_LINK, 81 BPF_OBJ_BTF, 82 }; 83 84 extern const char *bin_name; 85 86 extern json_writer_t *json_wtr; 87 extern bool json_output; 88 extern bool show_pinned; 89 extern bool show_pids; 90 extern bool block_mount; 91 extern bool verifier_logs; 92 extern bool relaxed_maps; 93 extern struct pinned_obj_table prog_table; 94 extern struct pinned_obj_table map_table; 95 extern struct pinned_obj_table link_table; 96 extern struct obj_refs_table refs_table; 97 98 void __printf(1, 2) p_err(const char *fmt, ...); 99 void __printf(1, 2) p_info(const char *fmt, ...); 100 101 bool is_prefix(const char *pfx, const char *str); 102 int detect_common_prefix(const char *arg, ...); 103 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep); 104 void usage(void) __noreturn; 105 106 void set_max_rlimit(void); 107 108 int mount_tracefs(const char *target); 109 110 struct pinned_obj_table { 111 DECLARE_HASHTABLE(table, 16); 112 }; 113 114 struct pinned_obj { 115 __u32 id; 116 char *path; 117 struct hlist_node hash; 118 }; 119 120 struct obj_refs_table { 121 DECLARE_HASHTABLE(table, 16); 122 }; 123 124 struct obj_ref { 125 int pid; 126 char comm[16]; 127 }; 128 129 struct obj_refs { 130 struct hlist_node node; 131 __u32 id; 132 int ref_cnt; 133 struct obj_ref *refs; 134 }; 135 136 struct btf; 137 struct bpf_line_info; 138 139 int build_pinned_obj_table(struct pinned_obj_table *table, 140 enum bpf_obj_type type); 141 void delete_pinned_obj_table(struct pinned_obj_table *tab); 142 __weak int build_obj_refs_table(struct obj_refs_table *table, 143 enum bpf_obj_type type); 144 __weak void delete_obj_refs_table(struct obj_refs_table *table); 145 __weak void emit_obj_refs_json(struct obj_refs_table *table, __u32 id, 146 json_writer_t *json_wtr); 147 __weak void emit_obj_refs_plain(struct obj_refs_table *table, __u32 id, 148 const char *prefix); 149 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 150 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode); 151 152 struct cmd { 153 const char *cmd; 154 int (*func)(int argc, char **argv); 155 }; 156 157 int cmd_select(const struct cmd *cmds, int argc, char **argv, 158 int (*help)(int argc, char **argv)); 159 160 int get_fd_type(int fd); 161 const char *get_fd_type_name(enum bpf_obj_type type); 162 char *get_fdinfo(int fd, const char *key); 163 int open_obj_pinned(const char *path, bool quiet); 164 int open_obj_pinned_any(const char *path, enum bpf_obj_type exp_type); 165 int mount_bpffs_for_pin(const char *name); 166 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***)); 167 int do_pin_fd(int fd, const char *name); 168 169 /* commands available in bootstrap mode */ 170 int do_gen(int argc, char **argv); 171 int do_btf(int argc, char **argv); 172 173 /* non-bootstrap only commands */ 174 int do_prog(int argc, char **arg) __weak; 175 int do_map(int argc, char **arg) __weak; 176 int do_link(int argc, char **arg) __weak; 177 int do_event_pipe(int argc, char **argv) __weak; 178 int do_cgroup(int argc, char **arg) __weak; 179 int do_perf(int argc, char **arg) __weak; 180 int do_net(int argc, char **arg) __weak; 181 int do_tracelog(int argc, char **arg) __weak; 182 int do_feature(int argc, char **argv) __weak; 183 int do_struct_ops(int argc, char **argv) __weak; 184 int do_iter(int argc, char **argv) __weak; 185 186 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what); 187 int prog_parse_fd(int *argc, char ***argv); 188 int prog_parse_fds(int *argc, char ***argv, int **fds); 189 int map_parse_fd(int *argc, char ***argv); 190 int map_parse_fds(int *argc, char ***argv, int **fds); 191 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len); 192 193 struct bpf_prog_linfo; 194 #ifdef HAVE_LIBBFD_SUPPORT 195 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 196 const char *arch, const char *disassembler_options, 197 const struct btf *btf, 198 const struct bpf_prog_linfo *prog_linfo, 199 __u64 func_ksym, unsigned int func_idx, 200 bool linum); 201 int disasm_init(void); 202 #else 203 static inline 204 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, 205 const char *arch, const char *disassembler_options, 206 const struct btf *btf, 207 const struct bpf_prog_linfo *prog_linfo, 208 __u64 func_ksym, unsigned int func_idx, 209 bool linum) 210 { 211 } 212 static inline int disasm_init(void) 213 { 214 p_err("No libbfd support"); 215 return -1; 216 } 217 #endif 218 void print_data_json(uint8_t *data, size_t len); 219 void print_hex_data_json(uint8_t *data, size_t len); 220 221 unsigned int get_page_size(void); 222 unsigned int get_possible_cpus(void); 223 const char * 224 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino, 225 const char **opt); 226 227 struct btf_dumper { 228 const struct btf *btf; 229 json_writer_t *jw; 230 bool is_plain_text; 231 bool prog_id_as_func_ptr; 232 }; 233 234 /* btf_dumper_type - print data along with type information 235 * @d: an instance containing context for dumping types 236 * @type_id: index in btf->types array. this points to the type to be dumped 237 * @data: pointer the actual data, i.e. the values to be printed 238 * 239 * Returns zero on success and negative error code otherwise 240 */ 241 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id, 242 const void *data); 243 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id, 244 char *func_only, int size); 245 246 void btf_dump_linfo_plain(const struct btf *btf, 247 const struct bpf_line_info *linfo, 248 const char *prefix, bool linum); 249 void btf_dump_linfo_json(const struct btf *btf, 250 const struct bpf_line_info *linfo, bool linum); 251 252 struct nlattr; 253 struct ifinfomsg; 254 struct tcmsg; 255 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb); 256 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind, 257 const char *devname, int ifindex); 258 259 int print_all_levels(__maybe_unused enum libbpf_print_level level, 260 const char *format, va_list args); 261 #endif 262