summaryrefslogtreecommitdiffstats
path: root/tools/bpf/bpftool/main.h
blob: 76e91641262b1025003fd3c9ccdcae2a0c062259 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */

#ifndef __BPF_TOOL_H
#define __BPF_TOOL_H

/* BFD and kernel.h both define GCC_VERSION, differently */
#undef GCC_VERSION
#include <stdbool.h>
#include <stdio.h>
#include <linux/bpf.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/hashtable.h>
#include <tools/libc_compat.h>

#include <bpf/libbpf.h>

#include "json_writer.h"

/* Make sure we do not use kernel-only integer typedefs */
#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64

static inline __u64 ptr_to_u64(const void *ptr)
{
	return (__u64)(unsigned long)ptr;
}

static inline void *u64_to_ptr(__u64 ptr)
{
	return (void *)(unsigned long)ptr;
}

#define NEXT_ARG()	({ argc--; argv++; if (argc < 0) usage(); })
#define NEXT_ARGP()	({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })
#define BAD_ARG()	({ p_err("what is '%s'?", *argv); -1; })
#define GET_ARG()	({ argc--; *argv++; })
#define REQ_ARGS(cnt)							\
	({								\
		int _cnt = (cnt);					\
		bool _res;						\
									\
		if (argc < _cnt) {					\
			p_err("'%s' needs at least %d arguments, %d found", \
			      argv[-1], _cnt, argc);			\
			_res = false;					\
		} else {						\
			_res = true;					\
		}							\
		_res;							\
	})

#define ERR_MAX_LEN	1024

#define BPF_TAG_FMT	"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"

#define HELP_SPEC_PROGRAM						\
	"PROG := { id PROG_ID | pinned FILE | tag PROG_TAG | name PROG_NAME }"
#define HELP_SPEC_OPTIONS						\
	"OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} |\n"	\
	"\t            {-m|--mapcompat} | {-n|--nomount} }"
#define HELP_SPEC_MAP							\
	"MAP := { id MAP_ID | pinned FILE | name MAP_NAME }"
#define HELP_SPEC_LINK							\
	"LINK := { id LINK_ID | pinned FILE }"

extern const char * const prog_type_name[];
extern const size_t prog_type_name_size;

extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE];

extern const char * const map_type_name[];
extern const size_t map_type_name_size;

/* keep in sync with the definition in skeleton/pid_iter.bpf.c */
enum bpf_obj_type {
	BPF_OBJ_UNKNOWN,
	BPF_OBJ_PROG,
	BPF_OBJ_MAP,
	BPF_OBJ_LINK,
	BPF_OBJ_BTF,
};

extern const char *bin_name;

extern json_writer_t *json_wtr;
extern bool json_output;
extern bool show_pinned;
extern bool show_pids;
extern bool block_mount;
extern bool verifier_logs;
extern bool relaxed_maps;
extern struct btf *base_btf;
extern struct pinned_obj_table prog_table;
extern struct pinned_obj_table map_table;
extern struct pinned_obj_table link_table;
extern struct obj_refs_table refs_table;

void __printf(1, 2) p_err(const char *fmt, ...);
void __printf(1, 2) p_info(const char *fmt, ...);

bool is_prefix(const char *pfx, const char *str);
int detect_common_prefix(const char *arg, ...);
void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
void usage(void) __noreturn;

void set_max_rlimit(void);

int mount_tracefs(const char *target);

struct pinned_obj_table {
	DECLARE_HASHTABLE(table, 16);
};

struct pinned_obj {
	__u32 id;
	char *path;
	struct hlist_node hash;
};

struct obj_refs_table {
	DECLARE_HASHTABLE(table, 16);
};

struct obj_ref {
	int pid;
	char comm[16];
};

struct obj_refs {
	struct hlist_node node;
	__u32 id;
	int ref_cnt;
	struct obj_ref *refs;
};

struct btf;
struct bpf_line_info;

int build_pinned_obj_table(struct pinned_obj_table *table,
			   enum bpf_obj_type type);
void delete_pinned_obj_table(struct pinned_obj_table *tab);
__weak int build_obj_refs_table(struct obj_refs_table *table,
				enum bpf_obj_type type);
__weak void delete_obj_refs_table(struct obj_refs_table *table);
__weak void emit_obj_refs_json(struct obj_refs_table *table, __u32 id,
			       json_writer_t *json_wtr);
__weak void emit_obj_refs_plain(struct obj_refs_table *table, __u32 id,
				const char *prefix);
void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);

struct cmd {
	const char *cmd;
	int (*func)(int argc, char **argv);
};

int cmd_select(const struct cmd *cmds, int argc, char **argv,
	       int (*help)(int argc, char **argv));

int get_fd_type(int fd);
const char *get_fd_type_name(enum bpf_obj_type type);
char *get_fdinfo(int fd, const char *key);
int open_obj_pinned(const char *path, bool quiet);
int open_obj_pinned_any(const char *path, enum bpf_obj_type exp_type);
int mount_bpffs_for_pin(const char *name);
int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***));
int do_pin_fd(int fd, const char *name);

/* commands available in bootstrap mode */
int do_gen(int argc, char **argv);
int do_btf(int argc, char **argv);

/* non-bootstrap only commands */
int do_prog(int argc, char **arg) __weak;
int do_map(int argc, char **arg) __weak;
int do_link(int argc, char **arg) __weak;
int do_event_pipe(int argc, char **argv) __weak;
int do_cgroup(int argc, char **arg) __weak;
int do_perf(int argc, char **arg) __weak;
int do_net(int argc, char **arg) __weak;
int do_tracelog(int argc, char **arg) __weak;
int do_feature(int argc, char **argv) __weak;
int do_struct_ops(int argc, char **argv) __weak;
int do_iter(int argc, char **argv) __weak;

int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
int prog_parse_fd(int *argc, char ***argv);
int prog_parse_fds(int *argc, char ***argv, int **fds);
int map_parse_fd(int *argc, char ***argv);
int map_parse_fds(int *argc, char ***argv, int **fds);
int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);

struct bpf_prog_linfo;
#ifdef HAVE_LIBBFD_SUPPORT
void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
		       const char *arch, const char *disassembler_options,
		       const struct btf *btf,
		       const struct bpf_prog_linfo *prog_linfo,
		       __u64 func_ksym, unsigned int func_idx,
		       bool linum);
int disasm_init(void);
#else
static inline
void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
		       const char *arch, const char *disassembler_options,
		       const struct btf *btf,
		       const struct bpf_prog_linfo *prog_linfo,
		       __u64 func_ksym, unsigned int func_idx,
		       bool linum)
{
}
static inline int disasm_init(void)
{
	p_err("No libbfd support");
	return -1;
}
#endif
void print_data_json(uint8_t *data, size_t len);
void print_hex_data_json(uint8_t *data, size_t len);

unsigned int get_page_size(void);
unsigned int get_possible_cpus(void);
const char *
ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
		      const char **opt);

struct btf_dumper {
	const struct btf *btf;
	json_writer_t *jw;
	bool is_plain_text;
	bool prog_id_as_func_ptr;
};

/* btf_dumper_type - print data along with type information
 * @d: an instance containing context for dumping types
 * @type_id: index in btf->types array. this points to the type to be dumped
 * @data: pointer the actual data, i.e. the values to be printed
 *
 * Returns zero on success and negative error code otherwise
 */
int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
		    const void *data);
void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
			  char *func_only, int size);

void btf_dump_linfo_plain(const struct btf *btf,
			  const struct bpf_line_info *linfo,
			  const char *prefix, bool linum);
void btf_dump_linfo_json(const struct btf *btf,
			 const struct bpf_line_info *linfo, bool linum);

struct nlattr;
struct ifinfomsg;
struct tcmsg;
int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
		   const char *devname, int ifindex);

int print_all_levels(__maybe_unused enum libbpf_print_level level,
		     const char *format, va_list args);
#endif