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 <linux/hashtable.h>
15 #include <tools/libc_compat.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}] | {-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 }"
67 extern const char * const prog_type_name[];
68 extern const size_t prog_type_name_size;
70 extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE];
72 extern const char * const map_type_name[];
73 extern const size_t map_type_name_size;
75 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */
84 extern const char *bin_name;
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;
98 void __printf(1, 2) p_err(const char *fmt, ...);
99 void __printf(1, 2) p_info(const char *fmt, ...);
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;
106 void set_max_rlimit(void);
108 int mount_tracefs(const char *target);
110 struct pinned_obj_table {
111 DECLARE_HASHTABLE(table, 16);
117 struct hlist_node hash;
120 struct obj_refs_table {
121 DECLARE_HASHTABLE(table, 16);
130 struct hlist_node node;
133 struct obj_ref *refs;
137 struct bpf_line_info;
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,
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);
154 int (*func)(int argc, char **argv);
157 int cmd_select(const struct cmd *cmds, int argc, char **argv,
158 int (*help)(int argc, char **argv));
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);
169 /* commands available in bootstrap mode */
170 int do_gen(int argc, char **argv);
171 int do_btf(int argc, char **argv);
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;
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);
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,
201 int disasm_init(void);
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,
212 static inline int disasm_init(void)
214 p_err("No libbfd support");
218 void print_data_json(uint8_t *data, size_t len);
219 void print_hex_data_json(uint8_t *data, size_t len);
221 unsigned int get_page_size(void);
222 unsigned int get_possible_cpus(void);
224 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
228 const struct btf *btf;
231 bool prog_id_as_func_ptr;
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
239 * Returns zero on success and negative error code otherwise
241 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
243 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
244 char *func_only, int size);
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);
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);
259 int print_all_levels(__maybe_unused enum libbpf_print_level level,
260 const char *format, va_list args);