1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
7 /* BFD and kernel.h both define GCC_VERSION, differently */
11 #include <linux/bpf.h>
12 #include <linux/compiler.h>
13 #include <linux/kernel.h>
14 #include <tools/libc_compat.h>
16 #include <bpf/hashmap.h>
17 #include <bpf/libbpf.h>
19 #include "json_writer.h"
21 /* Make sure we do not use kernel-only integer typedefs */
22 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
24 static inline __u64 ptr_to_u64(const void *ptr)
26 return (__u64)(unsigned long)ptr;
29 static inline void *u64_to_ptr(__u64 ptr)
31 return (void *)(unsigned long)ptr;
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) \
44 p_err("'%s' needs at least %d arguments, %d found", \
45 argv[-1], _cnt, argc); \
53 #define ERR_MAX_LEN 1024
55 #define BPF_TAG_FMT "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
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 }"
66 extern const char * const prog_type_name[];
67 extern const size_t prog_type_name_size;
69 extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE];
71 extern const char * const map_type_name[];
72 extern const size_t map_type_name_size;
74 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */
83 extern const char *bin_name;
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;
97 void __printf(1, 2) p_err(const char *fmt, ...);
98 void __printf(1, 2) p_info(const char *fmt, ...);
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;
105 void set_max_rlimit(void);
107 int mount_tracefs(const char *target);
116 struct obj_ref *refs;
120 struct bpf_line_info;
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,
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);
137 int (*func)(int argc, char **argv);
140 int cmd_select(const struct cmd *cmds, int argc, char **argv,
141 int (*help)(int argc, char **argv));
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);
152 /* commands available in bootstrap mode */
153 int do_gen(int argc, char **argv);
154 int do_btf(int argc, char **argv);
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;
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);
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,
184 int disasm_init(void);
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,
195 static inline int disasm_init(void)
197 p_err("No libbfd support");
201 void print_data_json(uint8_t *data, size_t len);
202 void print_hex_data_json(uint8_t *data, size_t len);
204 unsigned int get_page_size(void);
205 unsigned int get_possible_cpus(void);
207 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
211 const struct btf *btf;
214 bool prog_id_as_func_ptr;
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
222 * Returns zero on success and negative error code otherwise
224 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
226 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
227 char *func_only, int size);
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);
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);
242 int print_all_levels(__maybe_unused enum libbpf_print_level level,
243 const char *format, va_list args);
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);
248 static inline void *u32_as_hash_field(__u32 x)
250 return (void *)(uintptr_t)x;
253 static inline __u32 hash_field_as_u32(const void *x)
255 return (__u32)(uintptr_t)x;
258 static inline bool hashmap__empty(struct hashmap *map)
260 return map ? hashmap__size(map) == 0 : true;