whiterose

linux unikernel
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main.h (6877B)


      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 extern const char * const map_type_name[];
     79 extern const size_t map_type_name_size;
     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 bool block_mount;
     93 extern int bpf_flags;
     94 extern struct pinned_obj_table prog_table;
     95 extern struct pinned_obj_table map_table;
     96 
     97 void p_err(const char *fmt, ...);
     98 void p_info(const char *fmt, ...);
     99 
    100 bool is_prefix(const char *pfx, const char *str);
    101 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep);
    102 void usage(void) __noreturn;
    103 
    104 void set_max_rlimit(void);
    105 
    106 int mount_tracefs(const char *target);
    107 
    108 struct pinned_obj_table {
    109 	DECLARE_HASHTABLE(table, 16);
    110 };
    111 
    112 struct pinned_obj {
    113 	__u32 id;
    114 	char *path;
    115 	struct hlist_node hash;
    116 };
    117 
    118 struct btf;
    119 struct bpf_line_info;
    120 
    121 int build_pinned_obj_table(struct pinned_obj_table *table,
    122 			   enum bpf_obj_type type);
    123 void delete_pinned_obj_table(struct pinned_obj_table *tab);
    124 void print_dev_plain(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
    125 void print_dev_json(__u32 ifindex, __u64 ns_dev, __u64 ns_inode);
    126 
    127 struct cmd {
    128 	const char *cmd;
    129 	int (*func)(int argc, char **argv);
    130 };
    131 
    132 int cmd_select(const struct cmd *cmds, int argc, char **argv,
    133 	       int (*help)(int argc, char **argv));
    134 
    135 int get_fd_type(int fd);
    136 const char *get_fd_type_name(enum bpf_obj_type type);
    137 char *get_fdinfo(int fd, const char *key);
    138 int open_obj_pinned(char *path, bool quiet);
    139 int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
    140 int mount_bpffs_for_pin(const char *name);
    141 int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
    142 int do_pin_fd(int fd, const char *name);
    143 
    144 int do_prog(int argc, char **arg);
    145 int do_map(int argc, char **arg);
    146 int do_event_pipe(int argc, char **argv);
    147 int do_cgroup(int argc, char **arg);
    148 int do_perf(int argc, char **arg);
    149 int do_net(int argc, char **arg);
    150 int do_tracelog(int argc, char **arg);
    151 int do_feature(int argc, char **argv);
    152 
    153 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
    154 int prog_parse_fd(int *argc, char ***argv);
    155 int map_parse_fd(int *argc, char ***argv);
    156 int map_parse_fd_and_info(int *argc, char ***argv, void *info, __u32 *info_len);
    157 
    158 struct bpf_prog_linfo;
    159 #ifdef HAVE_LIBBFD_SUPPORT
    160 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
    161 		       const char *arch, const char *disassembler_options,
    162 		       const struct btf *btf,
    163 		       const struct bpf_prog_linfo *prog_linfo,
    164 		       __u64 func_ksym, unsigned int func_idx,
    165 		       bool linum);
    166 int disasm_init(void);
    167 #else
    168 static inline
    169 void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes,
    170 		       const char *arch, const char *disassembler_options,
    171 		       const struct btf *btf,
    172 		       const struct bpf_prog_linfo *prog_linfo,
    173 		       __u64 func_ksym, unsigned int func_idx,
    174 		       bool linum)
    175 {
    176 }
    177 static inline int disasm_init(void)
    178 {
    179 	p_err("No libbfd support");
    180 	return -1;
    181 }
    182 #endif
    183 void print_data_json(uint8_t *data, size_t len);
    184 void print_hex_data_json(uint8_t *data, size_t len);
    185 
    186 unsigned int get_page_size(void);
    187 unsigned int get_possible_cpus(void);
    188 const char *
    189 ifindex_to_bfd_params(__u32 ifindex, __u64 ns_dev, __u64 ns_ino,
    190 		      const char **opt);
    191 
    192 struct btf_dumper {
    193 	const struct btf *btf;
    194 	json_writer_t *jw;
    195 	bool is_plain_text;
    196 };
    197 
    198 /* btf_dumper_type - print data along with type information
    199  * @d: an instance containing context for dumping types
    200  * @type_id: index in btf->types array. this points to the type to be dumped
    201  * @data: pointer the actual data, i.e. the values to be printed
    202  *
    203  * Returns zero on success and negative error code otherwise
    204  */
    205 int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
    206 		    const void *data);
    207 void btf_dumper_type_only(const struct btf *btf, __u32 func_type_id,
    208 			  char *func_only, int size);
    209 
    210 void btf_dump_linfo_plain(const struct btf *btf,
    211 			  const struct bpf_line_info *linfo,
    212 			  const char *prefix, bool linum);
    213 void btf_dump_linfo_json(const struct btf *btf,
    214 			 const struct bpf_line_info *linfo, bool linum);
    215 
    216 struct nlattr;
    217 struct ifinfomsg;
    218 struct tcmsg;
    219 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
    220 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
    221 		   const char *devname, int ifindex);
    222 #endif