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TOMOYO Linux Cross Reference
Linux/tools/bpf/bpftool/main.h

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  1 /*
  2  * Copyright (C) 2017-2018 Netronome Systems, Inc.
  3  *
  4  * This software is dual licensed under the GNU General License Version 2,
  5  * June 1991 as shown in the file COPYING in the top-level directory of this
  6  * source tree or the BSD 2-Clause License provided below.  You have the
  7  * option to license this software under the complete terms of either license.
  8  *
  9  * The BSD 2-Clause License:
 10  *
 11  *     Redistribution and use in source and binary forms, with or
 12  *     without modification, are permitted provided that the following
 13  *     conditions are met:
 14  *
 15  *      1. Redistributions of source code must retain the above
 16  *         copyright notice, this list of conditions and the following
 17  *         disclaimer.
 18  *
 19  *      2. Redistributions in binary form must reproduce the above
 20  *         copyright notice, this list of conditions and the following
 21  *         disclaimer in the documentation and/or other materials
 22  *         provided with the distribution.
 23  *
 24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 31  * SOFTWARE.
 32  */
 33 
 34 #ifndef __BPF_TOOL_H
 35 #define __BPF_TOOL_H
 36 
 37 /* BFD and kernel.h both define GCC_VERSION, differently */
 38 #undef GCC_VERSION
 39 #include <stdbool.h>
 40 #include <stdio.h>
 41 #include <linux/bpf.h>
 42 #include <linux/compiler.h>
 43 #include <linux/kernel.h>
 44 #include <linux/hashtable.h>
 45 #include <tools/libc_compat.h>
 46 
 47 #include "json_writer.h"
 48 
 49 #define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
 50 
 51 #define NEXT_ARG()      ({ argc--; argv++; if (argc < 0) usage(); })
 52 #define NEXT_ARGP()     ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })
 53 #define BAD_ARG()       ({ p_err("what is '%s'?", *argv); -1; })
 54 #define GET_ARG()       ({ argc--; *argv++; })
 55 #define REQ_ARGS(cnt)                                                   \
 56         ({                                                              \
 57                 int _cnt = (cnt);                                       \
 58                 bool _res;                                              \
 59                                                                         \
 60                 if (argc < _cnt) {                                      \
 61                         p_err("'%s' needs at least %d arguments, %d found", \
 62                               argv[-1], _cnt, argc);                    \
 63                         _res = false;                                   \
 64                 } else {                                                \
 65                         _res = true;                                    \
 66                 }                                                       \
 67                 _res;                                                   \
 68         })
 69 
 70 #define ERR_MAX_LEN     1024
 71 
 72 #define BPF_TAG_FMT     "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
 73 
 74 #define HELP_SPEC_PROGRAM                                               \
 75         "PROG := { id PROG_ID | pinned FILE | tag PROG_TAG }"
 76 #define HELP_SPEC_OPTIONS                                               \
 77         "OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} | {-m|--mapcompat}"
 78 #define HELP_SPEC_MAP                                                   \
 79         "MAP := { id MAP_ID | pinned FILE }"
 80 
 81 enum bpf_obj_type {
 82         BPF_OBJ_UNKNOWN,
 83         BPF_OBJ_PROG,
 84         BPF_OBJ_MAP,
 85 };
 86 
 87 extern const char *bin_name;
 88 
 89 extern json_writer_t *json_wtr;
 90 extern bool json_output;
 91 extern bool show_pinned;
 92 extern int bpf_flags;
 93 extern struct pinned_obj_table prog_table;
 94 extern struct pinned_obj_table map_table;
 95 
 96 void p_err(const char *fmt, ...);
 97 void p_info(const char *fmt, ...);
 98 
 99 bool is_prefix(const char *pfx, const char *str);
100 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
101 void usage(void) __noreturn;
102 
103 struct pinned_obj_table {
104         DECLARE_HASHTABLE(table, 16);
105 };
106 
107 struct pinned_obj {
108         __u32 id;
109         char *path;
110         struct hlist_node hash;
111 };
112 
113 int build_pinned_obj_table(struct pinned_obj_table *table,
114                            enum bpf_obj_type type);
115 void delete_pinned_obj_table(struct pinned_obj_table *tab);
116 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
117 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
118 
119 struct cmd {
120         const char *cmd;
121         int (*func)(int argc, char **argv);
122 };
123 
124 int cmd_select(const struct cmd *cmds, int argc, char **argv,
125                int (*help)(int argc, char **argv));
126 
127 int get_fd_type(int fd);
128 const char *get_fd_type_name(enum bpf_obj_type type);
129 char *get_fdinfo(int fd, const char *key);
130 int open_obj_pinned(char *path, bool quiet);
131 int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
132 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
133 int do_pin_fd(int fd, const char *name);
134 
135 int do_prog(int argc, char **arg);
136 int do_map(int argc, char **arg);
137 int do_event_pipe(int argc, char **argv);
138 int do_cgroup(int argc, char **arg);
139 int do_perf(int argc, char **arg);
140 int do_net(int argc, char **arg);
141 
142 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
143 int prog_parse_fd(int *argc, char ***argv);
144 int map_parse_fd(int *argc, char ***argv);
145 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);
146 
147 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
148                        const char *arch, const char *disassembler_options);
149 void print_data_json(uint8_t *data, size_t len);
150 void print_hex_data_json(uint8_t *data, size_t len);
151 
152 unsigned int get_page_size(void);
153 unsigned int get_possible_cpus(void);
154 const char *
155 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
156                       const char **opt);
157 
158 struct btf_dumper {
159         const struct btf *btf;
160         json_writer_t *jw;
161         bool is_plain_text;
162 };
163 
164 /* btf_dumper_type - print data along with type information
165  * @d: an instance containing context for dumping types
166  * @type_id: index in btf->types array. this points to the type to be dumped
167  * @data: pointer the actual data, i.e. the values to be printed
168  *
169  * Returns zero on success and negative error code otherwise
170  */
171 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
172                     const void *data);
173 
174 struct nlattr;
175 struct ifinfomsg;
176 struct tcmsg;
177 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
178 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
179                    const char *devname, int ifindex);
180 #endif
181 

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