tools/bpf/bpftool/main.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #ifndef __BPF_TOOL_H
   5 #define __BPF_TOOL_H
   6
   7 /* BFD and kernel.h both define GCC_VERSION, differently */
   8 #undef GCC_VERSION
   9 #include <stdbool.h>
  10 #include <stdio.h>
  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>
  16
  17 #include "json_writer.h"
  18
  19 #define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
  20
  21 #define NEXT_ARG()      ({ argc--; argv++; if (argc < 0) usage(); })
  22 #define NEXT_ARGP()     ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })
  23 #define BAD_ARG()       ({ p_err("what is '%s'?", *argv); -1; })
  24 #define GET_ARG()       ({ argc--; *argv++; })
  25 #define REQ_ARGS(cnt)                                                   \
  26         ({                                                              \
  27                 int _cnt = (cnt);                                       \
  28                 bool _res;                                              \
  29                                                                         \
  30                 if (argc < _cnt) {                                      \
  31                         p_err("'%s' needs at least %d arguments, %d found", \
  32                               argv[-1], _cnt, argc);                    \
  33                         _res = false;                                   \
  34                 } else {                                                \
  35                         _res = true;                                    \
  36                 }                                                       \
  37                 _res;                                                   \
  38         })
  39
  40 #define ERR_MAX_LEN     1024
  41
  42 #define BPF_TAG_FMT     "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
  43
  44 #define HELP_SPEC_PROGRAM                                               \
  45         "PROG := { id PROG_ID | pinned FILE | tag PROG_TAG }"
  46 #define HELP_SPEC_OPTIONS                                               \
  47         "OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} |\n"   \
  48         "\t            {-m|--mapcompat} | {-n|--nomount} }"
  49 #define HELP_SPEC_MAP                                                   \
  50         "MAP := { id MAP_ID | pinned FILE }"
  51
  52 static const char * const prog_type_name[] = {
  53         [BPF_PROG_TYPE_UNSPEC]                  = "unspec",
  54         [BPF_PROG_TYPE_SOCKET_FILTER]           = "socket_filter",
  55         [BPF_PROG_TYPE_KPROBE]                  = "kprobe",
  56         [BPF_PROG_TYPE_SCHED_CLS]               = "sched_cls",
  57         [BPF_PROG_TYPE_SCHED_ACT]               = "sched_act",
  58         [BPF_PROG_TYPE_TRACEPOINT]              = "tracepoint",
  59         [BPF_PROG_TYPE_XDP]                     = "xdp",
  60         [BPF_PROG_TYPE_PERF_EVENT]              = "perf_event",
  61         [BPF_PROG_TYPE_CGROUP_SKB]              = "cgroup_skb",
  62         [BPF_PROG_TYPE_CGROUP_SOCK]             = "cgroup_sock",
  63         [BPF_PROG_TYPE_LWT_IN]                  = "lwt_in",
  64         [BPF_PROG_TYPE_LWT_OUT]                 = "lwt_out",
  65         [BPF_PROG_TYPE_LWT_XMIT]                = "lwt_xmit",
  66         [BPF_PROG_TYPE_SOCK_OPS]                = "sock_ops",
  67         [BPF_PROG_TYPE_SK_SKB]                  = "sk_skb",
  68         [BPF_PROG_TYPE_CGROUP_DEVICE]           = "cgroup_device",
  69         [BPF_PROG_TYPE_SK_MSG]                  = "sk_msg",
  70         [BPF_PROG_TYPE_RAW_TRACEPOINT]          = "raw_tracepoint",
  71         [BPF_PROG_TYPE_CGROUP_SOCK_ADDR]        = "cgroup_sock_addr",
  72         [BPF_PROG_TYPE_LWT_SEG6LOCAL]           = "lwt_seg6local",
  73         [BPF_PROG_TYPE_LIRC_MODE2]              = "lirc_mode2",
  74         [BPF_PROG_TYPE_SK_REUSEPORT]            = "sk_reuseport",
  75         [BPF_PROG_TYPE_FLOW_DISSECTOR]          = "flow_dissector",
  76 };
  77
  78 enum bpf_obj_type {
  79         BPF_OBJ_UNKNOWN,
  80         BPF_OBJ_PROG,
  81         BPF_OBJ_MAP,
  82 };
  83
  84 extern const char *bin_name;
  85
  86 extern json_writer_t *json_wtr;
  87 extern bool json_output;
  88 extern bool show_pinned;
  89 extern bool block_mount;
  90 extern int bpf_flags;
  91 extern struct pinned_obj_table prog_table;
  92 extern struct pinned_obj_table map_table;
  93
  94 void p_err(const char *fmt, ...);
  95 void p_info(const char *fmt, ...);
  96
  97 bool is_prefix(const char *pfx, const char *str);
  98 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
  99 void usage(void) __noreturn;
 100
 101 void set_max_rlimit(void);
 102
 103 int mount_tracefs(const char *target);
 104
 105 struct pinned_obj_table {
 106         DECLARE_HASHTABLE(table, 16);
 107 };
 108
 109 struct pinned_obj {
 110         __u32 id;
 111         char *path;
 112         struct hlist_node hash;
 113 };
 114
 115 struct btf;
 116 struct bpf_line_info;
 117
 118 int build_pinned_obj_table(struct pinned_obj_table *table,
 119                            enum bpf_obj_type type);
 120 void delete_pinned_obj_table(struct pinned_obj_table *tab);
 121 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
 122 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
 123
 124 struct cmd {
 125         const char *cmd;
 126         int (*func)(int argc, char **argv);
 127 };
 128
 129 int cmd_select(const struct cmd *cmds, int argc, char **argv,
 130                int (*help)(int argc, char **argv));
 131
 132 int get_fd_type(int fd);
 133 const char *get_fd_type_name(enum bpf_obj_type type);
 134 char *get_fdinfo(int fd, const char *key);
 135 int open_obj_pinned(char *path, bool quiet);
 136 int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
 137 int mount_bpffs_for_pin(const char *name);
 138 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
 139 int do_pin_fd(int fd, const char *name);
 140
 141 int do_prog(int argc, char **arg);
 142 int do_map(int argc, char **arg);
 143 int do_event_pipe(int argc, char **argv);
 144 int do_cgroup(int argc, char **arg);
 145 int do_perf(int argc, char **arg);
 146 int do_net(int argc, char **arg);
 147 int do_tracelog(int argc, char **arg);
 148
 149 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
 150 int prog_parse_fd(int *argc, char ***argv);
 151 int map_parse_fd(int *argc, char ***argv);
 152 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);
 153
 154 struct bpf_prog_linfo;
 155 #ifdef HAVE_LIBBFD_SUPPORT
 156 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
 157                        const char *arch, const char *disassembler_options,
 158                        const struct btf *btf,
 159                        const struct bpf_prog_linfo *prog_linfo,
 160                        __u64 func_ksym, unsigned int func_idx,
 161                        bool linum);
 162 int disasm_init(void);
 163 #else
 164 static inline
 165 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
 166                        const char *arch, const char *disassembler_options,
 167                        const struct btf *btf,
 168                        const struct bpf_prog_linfo *prog_linfo,
 169                        __u64 func_ksym, unsigned int func_idx,
 170                        bool linum)
 171 {
 172 }
 173 static inline int disasm_init(void)
 174 {
 175         p_err("No libbfd support");
 176         return -1;
 177 }
 178 #endif
 179 void print_data_json(uint8_t *data, size_t len);
 180 void print_hex_data_json(uint8_t *data, size_t len);
 181
 182 unsigned int get_page_size(void);
 183 unsigned int get_possible_cpus(void);
 184 const char *
 185 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
 186                       const char **opt);
 187
 188 struct btf_dumper {
 189         const struct btf *btf;
 190         json_writer_t *jw;
 191         bool is_plain_text;
 192 };
 193
 194 /* btf_dumper_type - print data along with type information
 195  * @d: an instance containing context for dumping types
 196  * @type_id: index in btf->types array. this points to the type to be dumped
 197  * @data: pointer the actual data, i.e. the values to be printed
 198  *
 199  * Returns zero on success and negative error code otherwise
 200  */
 201 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
 202                     const void *data);
 203 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
 204                           char *func_only, int size);
 205
 206 void btf_dump_linfo_plain(const struct btf *btf,
 207                           const struct bpf_line_info *linfo,
 208                           const char *prefix, bool linum);
 209 void btf_dump_linfo_json(const struct btf *btf,
 210                          const struct bpf_line_info *linfo, bool linum);
 211
 212 struct nlattr;
 213 struct ifinfomsg;
 214 struct tcmsg;
 215 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
 216 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
 217                    const char *devname, int ifindex);
 218 #endif