1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
14 #include <bpf/hashmap.h>
15 #include <bpf/libbpf.h>
19 #define BATCH_LINE_LEN_MAX 65536
20 #define BATCH_ARG_NB_MAX 4096
24 static char **last_argv;
25 static int (*last_do_help)(int argc, char **argv);
26 json_writer_t *json_wtr;
35 struct hashmap *refs_table;
37 static void __noreturn clean_and_exit(int i)
40 jsonw_destroy(&json_wtr);
47 last_do_help(last_argc - 1, last_argv + 1);
52 static int do_help(int argc, char **argv)
60 "Usage: %s [OPTIONS] OBJECT { COMMAND | help }\n"
61 " %s batch file FILE\n"
64 " OBJECT := { prog | map | link | cgroup | perf | net | feature | btf | gen | struct_ops | iter }\n"
65 " " HELP_SPEC_OPTIONS " |\n"
68 bin_name, bin_name, bin_name);
73 static int do_batch(int argc, char **argv);
74 static int do_version(int argc, char **argv);
76 static const struct cmd commands[] = {
78 { "batch", do_batch },
82 { "cgroup", do_cgroup },
85 { "feature", do_feature },
88 { "struct_ops", do_struct_ops },
90 { "version", do_version },
94 #ifndef BPFTOOL_VERSION
95 /* bpftool's major and minor version numbers are aligned on libbpf's. There is
96 * an offset of 6 for the version number, because bpftool's version was higher
97 * than libbpf's when we adopted this scheme. The patch number remains at 0
98 * for now. Set BPFTOOL_VERSION to override.
100 #define BPFTOOL_MAJOR_VERSION (LIBBPF_MAJOR_VERSION + 6)
101 #define BPFTOOL_MINOR_VERSION LIBBPF_MINOR_VERSION
102 #define BPFTOOL_PATCH_VERSION 0
106 print_feature(const char *feature, bool state, unsigned int *nb_features)
109 printf("%s %s", *nb_features ? "," : "", feature);
110 *nb_features = *nb_features + 1;
114 static int do_version(int argc, char **argv)
116 #ifdef HAVE_LIBBFD_SUPPORT
117 const bool has_libbfd = true;
119 const bool has_libbfd = false;
121 #ifdef HAVE_LLVM_SUPPORT
122 const bool has_llvm = true;
124 const bool has_llvm = false;
126 #ifdef BPFTOOL_WITHOUT_SKELETONS
127 const bool has_skeletons = false;
129 const bool has_skeletons = true;
131 bool bootstrap = false;
134 for (i = 0; commands[i].cmd; i++) {
135 if (!strcmp(commands[i].cmd, "prog")) {
136 /* Assume we run a bootstrap version if "bpftool prog"
139 bootstrap = !commands[i].func;
145 jsonw_start_object(json_wtr); /* root object */
147 jsonw_name(json_wtr, "version");
148 #ifdef BPFTOOL_VERSION
149 jsonw_printf(json_wtr, "\"%s\"", BPFTOOL_VERSION);
151 jsonw_printf(json_wtr, "\"%d.%d.%d\"", BPFTOOL_MAJOR_VERSION,
152 BPFTOOL_MINOR_VERSION, BPFTOOL_PATCH_VERSION);
154 jsonw_name(json_wtr, "libbpf_version");
155 jsonw_printf(json_wtr, "\"%d.%d\"",
156 libbpf_major_version(), libbpf_minor_version());
158 jsonw_name(json_wtr, "features");
159 jsonw_start_object(json_wtr); /* features */
160 jsonw_bool_field(json_wtr, "libbfd", has_libbfd);
161 jsonw_bool_field(json_wtr, "llvm", has_llvm);
162 jsonw_bool_field(json_wtr, "skeletons", has_skeletons);
163 jsonw_bool_field(json_wtr, "bootstrap", bootstrap);
164 jsonw_end_object(json_wtr); /* features */
166 jsonw_end_object(json_wtr); /* root object */
168 unsigned int nb_features = 0;
170 #ifdef BPFTOOL_VERSION
171 printf("%s v%s\n", bin_name, BPFTOOL_VERSION);
173 printf("%s v%d.%d.%d\n", bin_name, BPFTOOL_MAJOR_VERSION,
174 BPFTOOL_MINOR_VERSION, BPFTOOL_PATCH_VERSION);
176 printf("using libbpf %s\n", libbpf_version_string());
178 print_feature("libbfd", has_libbfd, &nb_features);
179 print_feature("llvm", has_llvm, &nb_features);
180 print_feature("skeletons", has_skeletons, &nb_features);
181 print_feature("bootstrap", bootstrap, &nb_features);
187 int cmd_select(const struct cmd *cmds, int argc, char **argv,
188 int (*help)(int argc, char **argv))
196 if (argc < 1 && cmds[0].func)
197 return cmds[0].func(argc, argv);
199 for (i = 0; cmds[i].cmd; i++) {
200 if (is_prefix(*argv, cmds[i].cmd)) {
202 p_err("command '%s' is not supported in bootstrap mode",
206 return cmds[i].func(argc - 1, argv + 1);
210 help(argc - 1, argv + 1);
215 bool is_prefix(const char *pfx, const char *str)
219 if (strlen(str) < strlen(pfx))
222 return !memcmp(str, pfx, strlen(pfx));
225 /* Last argument MUST be NULL pointer */
226 int detect_common_prefix(const char *arg, ...)
228 unsigned int count = 0;
233 snprintf(msg, sizeof(msg), "ambiguous prefix: '%s' could be '", arg);
235 while ((ref = va_arg(ap, const char *))) {
236 if (!is_prefix(arg, ref))
240 strncat(msg, "' or '", sizeof(msg) - strlen(msg) - 1);
241 strncat(msg, ref, sizeof(msg) - strlen(msg) - 1);
244 strncat(msg, "'", sizeof(msg) - strlen(msg) - 1);
254 void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep)
256 unsigned char *data = arg;
259 for (i = 0; i < n; i++) {
260 const char *pfx = "";
271 fprintf(f, "%s%02hhx", i ? pfx : "", data[i]);
275 /* Split command line into argument vector. */
276 static int make_args(char *line, char *n_argv[], int maxargs, int cmd_nb)
278 static const char ws[] = " \t\r\n";
283 /* Skip leading whitespace. */
284 cp += strspn(cp, ws);
289 if (n_argc >= (maxargs - 1)) {
290 p_err("too many arguments to command %d", cmd_nb);
294 /* Word begins with quote. */
295 if (*cp == '\'' || *cp == '"') {
298 n_argv[n_argc++] = cp;
299 /* Find ending quote. */
300 cp = strchr(cp, quote);
302 p_err("unterminated quoted string in command %d",
307 n_argv[n_argc++] = cp;
309 /* Find end of word. */
310 cp += strcspn(cp, ws);
315 /* Separate words. */
318 n_argv[n_argc] = NULL;
323 static int do_batch(int argc, char **argv)
325 char buf[BATCH_LINE_LEN_MAX], contline[BATCH_LINE_LEN_MAX];
326 char *n_argv[BATCH_ARG_NB_MAX];
327 unsigned int lines = 0;
335 p_err("too few parameters for batch");
337 } else if (argc > 2) {
338 p_err("too many parameters for batch");
340 } else if (!is_prefix(*argv, "file")) {
341 p_err("expected 'file', got: %s", *argv);
346 if (!strcmp(*argv, "-"))
349 fp = fopen(*argv, "r");
351 p_err("Can't open file (%s): %s", *argv, strerror(errno));
356 jsonw_start_array(json_wtr);
357 while (fgets(buf, sizeof(buf), fp)) {
358 cp = strchr(buf, '#');
362 if (strlen(buf) == sizeof(buf) - 1) {
367 /* Append continuation lines if any (coming after a line ending
368 * with '\' in the batch file).
370 while ((cp = strstr(buf, "\\\n")) != NULL) {
371 if (!fgets(contline, sizeof(contline), fp) ||
372 strlen(contline) == 0) {
373 p_err("missing continuation line on command %d",
379 cp = strchr(contline, '#');
383 if (strlen(buf) + strlen(contline) + 1 > sizeof(buf)) {
384 p_err("command %d is too long", lines);
388 buf[strlen(buf) - 2] = '\0';
389 strcat(buf, contline);
392 n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines);
401 jsonw_start_object(json_wtr);
402 jsonw_name(json_wtr, "command");
403 jsonw_start_array(json_wtr);
404 for (i = 0; i < n_argc; i++)
405 jsonw_string(json_wtr, n_argv[i]);
406 jsonw_end_array(json_wtr);
407 jsonw_name(json_wtr, "output");
410 err = cmd_select(commands, n_argc, n_argv, do_help);
413 jsonw_end_object(json_wtr);
421 if (errno && errno != ENOENT) {
422 p_err("reading batch file failed: %s", strerror(errno));
426 printf("processed %d commands\n", lines);
433 jsonw_end_array(json_wtr);
438 int main(int argc, char **argv)
440 static const struct option options[] = {
441 { "json", no_argument, NULL, 'j' },
442 { "help", no_argument, NULL, 'h' },
443 { "pretty", no_argument, NULL, 'p' },
444 { "version", no_argument, NULL, 'V' },
445 { "bpffs", no_argument, NULL, 'f' },
446 { "mapcompat", no_argument, NULL, 'm' },
447 { "nomount", no_argument, NULL, 'n' },
448 { "debug", no_argument, NULL, 'd' },
449 { "use-loader", no_argument, NULL, 'L' },
450 { "base-btf", required_argument, NULL, 'B' },
453 bool version_requested = false;
459 /* Libcap < 2.63 hooks before main() to compute the number of
460 * capabilities of the running kernel, and doing so it calls prctl()
461 * which may fail and set errno to non-zero.
462 * Let's reset errno to make sure this does not interfere with the
468 last_do_help = do_help;
469 pretty_output = false;
473 bin_name = "bpftool";
476 while ((opt = getopt_long(argc, argv, "VhpjfLmndB:l",
477 options, NULL)) >= 0) {
480 version_requested = true;
483 return do_help(argc, argv);
485 pretty_output = true;
489 json_wtr = jsonw_new(stdout);
491 p_err("failed to create JSON writer");
496 jsonw_pretty(json_wtr, pretty_output);
508 libbpf_set_print(print_all_levels);
509 verifier_logs = true;
512 base_btf = btf__parse(optarg, NULL);
514 p_err("failed to parse base BTF at '%s': %d\n",
523 p_err("unrecognized option '%s'", argv[optind - 1]);
536 if (version_requested)
537 return do_version(argc, argv);
539 ret = cmd_select(commands, argc, argv, do_help);
542 jsonw_destroy(&json_wtr);