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 #define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
26 #define NEXT_ARG() ({ argc--; argv++; if (argc < 0) usage(); })
27 #define NEXT_ARGP() ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })
28 #define BAD_ARG() ({ p_err("what is '%s'?", *argv); -1; })
29 #define GET_ARG() ({ argc--; *argv++; })
30 #define REQ_ARGS(cnt) \
36 p_err("'%s' needs at least %d arguments, %d found", \
37 argv[-1], _cnt, argc); \
45 #define ERR_MAX_LEN 1024
47 #define BPF_TAG_FMT "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
49 #define HELP_SPEC_PROGRAM \
50 "PROG := { id PROG_ID | pinned FILE | tag PROG_TAG | name PROG_NAME }"
51 #define HELP_SPEC_OPTIONS \
52 "OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} |\n" \
53 "\t {-m|--mapcompat} | {-n|--nomount} }"
54 #define HELP_SPEC_MAP \
55 "MAP := { id MAP_ID | pinned FILE | name MAP_NAME }"
56 #define HELP_SPEC_LINK \
57 "LINK := { id LINK_ID | pinned FILE }"
59 extern const char * const prog_type_name[];
60 extern const size_t prog_type_name_size;
62 extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE];
64 extern const char * const map_type_name[];
65 extern const size_t map_type_name_size;
67 /* keep in sync with the definition in skeleton/pid_iter.bpf.c */
76 extern const char *bin_name;
78 extern json_writer_t *json_wtr;
79 extern bool json_output;
80 extern bool show_pinned;
81 extern bool show_pids;
82 extern bool block_mount;
83 extern bool verifier_logs;
84 extern bool relaxed_maps;
85 extern struct pinned_obj_table prog_table;
86 extern struct pinned_obj_table map_table;
87 extern struct pinned_obj_table link_table;
88 extern struct obj_refs_table refs_table;
90 void __printf(1, 2) p_err(const char *fmt, ...);
91 void __printf(1, 2) p_info(const char *fmt, ...);
93 bool is_prefix(const char *pfx, const char *str);
94 int detect_common_prefix(const char *arg, ...);
95 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
96 void usage(void) __noreturn;
98 void set_max_rlimit(void);
100 int mount_tracefs(const char *target);
102 struct pinned_obj_table {
103 DECLARE_HASHTABLE(table, 16);
109 struct hlist_node hash;
112 struct obj_refs_table {
113 DECLARE_HASHTABLE(table, 16);
122 struct hlist_node node;
125 struct obj_ref *refs;
129 struct bpf_line_info;
131 int build_pinned_obj_table(struct pinned_obj_table *table,
132 enum bpf_obj_type type);
133 void delete_pinned_obj_table(struct pinned_obj_table *tab);
134 __weak int build_obj_refs_table(struct obj_refs_table *table,
135 enum bpf_obj_type type);
136 __weak void delete_obj_refs_table(struct obj_refs_table *table);
137 __weak void emit_obj_refs_json(struct obj_refs_table *table, __u32 id,
138 json_writer_t *json_wtr);
139 __weak void emit_obj_refs_plain(struct obj_refs_table *table, __u32 id,
141 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
142 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
146 int (*func)(int argc, char **argv);
149 int cmd_select(const struct cmd *cmds, int argc, char **argv,
150 int (*help)(int argc, char **argv));
152 int get_fd_type(int fd);
153 const char *get_fd_type_name(enum bpf_obj_type type);
154 char *get_fdinfo(int fd, const char *key);
155 int open_obj_pinned(const char *path, bool quiet);
156 int open_obj_pinned_any(const char *path, enum bpf_obj_type exp_type);
157 int mount_bpffs_for_pin(const char *name);
158 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***));
159 int do_pin_fd(int fd, const char *name);
161 /* commands available in bootstrap mode */
162 int do_gen(int argc, char **argv);
163 int do_btf(int argc, char **argv);
165 /* non-bootstrap only commands */
166 int do_prog(int argc, char **arg) __weak;
167 int do_map(int argc, char **arg) __weak;
168 int do_link(int argc, char **arg) __weak;
169 int do_event_pipe(int argc, char **argv) __weak;
170 int do_cgroup(int argc, char **arg) __weak;
171 int do_perf(int argc, char **arg) __weak;
172 int do_net(int argc, char **arg) __weak;
173 int do_tracelog(int argc, char **arg) __weak;
174 int do_feature(int argc, char **argv) __weak;
175 int do_struct_ops(int argc, char **argv) __weak;
176 int do_iter(int argc, char **argv) __weak;
178 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
179 int prog_parse_fd(int *argc, char ***argv);
180 int prog_parse_fds(int *argc, char ***argv, int **fds);
181 int map_parse_fd(int *argc, char ***argv);
182 int map_parse_fds(int *argc, char ***argv, int **fds);
183 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);
185 struct bpf_prog_linfo;
186 #ifdef HAVE_LIBBFD_SUPPORT
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,
193 int disasm_init(void);
196 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
197 const char *arch, const char *disassembler_options,
198 const struct btf *btf,
199 const struct bpf_prog_linfo *prog_linfo,
200 __u64 func_ksym, unsigned int func_idx,
204 static inline int disasm_init(void)
206 p_err("No libbfd support");
210 void print_data_json(uint8_t *data, size_t len);
211 void print_hex_data_json(uint8_t *data, size_t len);
213 unsigned int get_page_size(void);
214 unsigned int get_possible_cpus(void);
216 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
220 const struct btf *btf;
223 bool prog_id_as_func_ptr;
226 /* btf_dumper_type - print data along with type information
227 * @d: an instance containing context for dumping types
228 * @type_id: index in btf->types array. this points to the type to be dumped
229 * @data: pointer the actual data, i.e. the values to be printed
231 * Returns zero on success and negative error code otherwise
233 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
235 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
236 char *func_only, int size);
238 void btf_dump_linfo_plain(const struct btf *btf,
239 const struct bpf_line_info *linfo,
240 const char *prefix, bool linum);
241 void btf_dump_linfo_json(const struct btf *btf,
242 const struct bpf_line_info *linfo, bool linum);
247 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
248 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
249 const char *devname, int ifindex);
251 int print_all_levels(__maybe_unused enum libbpf_print_level level,
252 const char *format, va_list args);