530 строки
11 KiB
C
530 строки
11 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <getopt.h>
|
|
#include <linux/bpf.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <bpf/bpf.h>
|
|
#include <bpf/btf.h>
|
|
#include <bpf/hashmap.h>
|
|
#include <bpf/libbpf.h>
|
|
|
|
#include "main.h"
|
|
|
|
#define BATCH_LINE_LEN_MAX 65536
|
|
#define BATCH_ARG_NB_MAX 4096
|
|
|
|
const char *bin_name;
|
|
static int last_argc;
|
|
static char **last_argv;
|
|
static int (*last_do_help)(int argc, char **argv);
|
|
json_writer_t *json_wtr;
|
|
bool pretty_output;
|
|
bool json_output;
|
|
bool show_pinned;
|
|
bool block_mount;
|
|
bool verifier_logs;
|
|
bool relaxed_maps;
|
|
bool use_loader;
|
|
bool legacy_libbpf;
|
|
struct btf *base_btf;
|
|
struct hashmap *refs_table;
|
|
|
|
static void __noreturn clean_and_exit(int i)
|
|
{
|
|
if (json_output)
|
|
jsonw_destroy(&json_wtr);
|
|
|
|
exit(i);
|
|
}
|
|
|
|
void usage(void)
|
|
{
|
|
last_do_help(last_argc - 1, last_argv + 1);
|
|
|
|
clean_and_exit(-1);
|
|
}
|
|
|
|
static int do_help(int argc, char **argv)
|
|
{
|
|
if (json_output) {
|
|
jsonw_null(json_wtr);
|
|
return 0;
|
|
}
|
|
|
|
fprintf(stderr,
|
|
"Usage: %s [OPTIONS] OBJECT { COMMAND | help }\n"
|
|
" %s batch file FILE\n"
|
|
" %s version\n"
|
|
"\n"
|
|
" OBJECT := { prog | map | link | cgroup | perf | net | feature | btf | gen | struct_ops | iter }\n"
|
|
" " HELP_SPEC_OPTIONS " |\n"
|
|
" {-V|--version} }\n"
|
|
"",
|
|
bin_name, bin_name, bin_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifndef BPFTOOL_VERSION
|
|
/* bpftool's major and minor version numbers are aligned on libbpf's. There is
|
|
* an offset of 6 for the version number, because bpftool's version was higher
|
|
* than libbpf's when we adopted this scheme. The patch number remains at 0
|
|
* for now. Set BPFTOOL_VERSION to override.
|
|
*/
|
|
#define BPFTOOL_MAJOR_VERSION (LIBBPF_MAJOR_VERSION + 6)
|
|
#define BPFTOOL_MINOR_VERSION LIBBPF_MINOR_VERSION
|
|
#define BPFTOOL_PATCH_VERSION 0
|
|
#endif
|
|
|
|
static int do_version(int argc, char **argv)
|
|
{
|
|
#ifdef HAVE_LIBBFD_SUPPORT
|
|
const bool has_libbfd = true;
|
|
#else
|
|
const bool has_libbfd = false;
|
|
#endif
|
|
#ifdef BPFTOOL_WITHOUT_SKELETONS
|
|
const bool has_skeletons = false;
|
|
#else
|
|
const bool has_skeletons = true;
|
|
#endif
|
|
|
|
if (json_output) {
|
|
jsonw_start_object(json_wtr); /* root object */
|
|
|
|
jsonw_name(json_wtr, "version");
|
|
#ifdef BPFTOOL_VERSION
|
|
jsonw_printf(json_wtr, "\"%s\"", BPFTOOL_VERSION);
|
|
#else
|
|
jsonw_printf(json_wtr, "\"%d.%d.%d\"", BPFTOOL_MAJOR_VERSION,
|
|
BPFTOOL_MINOR_VERSION, BPFTOOL_PATCH_VERSION);
|
|
#endif
|
|
jsonw_name(json_wtr, "libbpf_version");
|
|
jsonw_printf(json_wtr, "\"%d.%d\"",
|
|
libbpf_major_version(), libbpf_minor_version());
|
|
|
|
jsonw_name(json_wtr, "features");
|
|
jsonw_start_object(json_wtr); /* features */
|
|
jsonw_bool_field(json_wtr, "libbfd", has_libbfd);
|
|
jsonw_bool_field(json_wtr, "libbpf_strict", !legacy_libbpf);
|
|
jsonw_bool_field(json_wtr, "skeletons", has_skeletons);
|
|
jsonw_end_object(json_wtr); /* features */
|
|
|
|
jsonw_end_object(json_wtr); /* root object */
|
|
} else {
|
|
unsigned int nb_features = 0;
|
|
|
|
#ifdef BPFTOOL_VERSION
|
|
printf("%s v%s\n", bin_name, BPFTOOL_VERSION);
|
|
#else
|
|
printf("%s v%d.%d.%d\n", bin_name, BPFTOOL_MAJOR_VERSION,
|
|
BPFTOOL_MINOR_VERSION, BPFTOOL_PATCH_VERSION);
|
|
#endif
|
|
printf("using libbpf %s\n", libbpf_version_string());
|
|
printf("features:");
|
|
if (has_libbfd) {
|
|
printf(" libbfd");
|
|
nb_features++;
|
|
}
|
|
if (!legacy_libbpf) {
|
|
printf("%s libbpf_strict", nb_features++ ? "," : "");
|
|
nb_features++;
|
|
}
|
|
if (has_skeletons)
|
|
printf("%s skeletons", nb_features++ ? "," : "");
|
|
printf("\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int cmd_select(const struct cmd *cmds, int argc, char **argv,
|
|
int (*help)(int argc, char **argv))
|
|
{
|
|
unsigned int i;
|
|
|
|
last_argc = argc;
|
|
last_argv = argv;
|
|
last_do_help = help;
|
|
|
|
if (argc < 1 && cmds[0].func)
|
|
return cmds[0].func(argc, argv);
|
|
|
|
for (i = 0; cmds[i].cmd; i++) {
|
|
if (is_prefix(*argv, cmds[i].cmd)) {
|
|
if (!cmds[i].func) {
|
|
p_err("command '%s' is not supported in bootstrap mode",
|
|
cmds[i].cmd);
|
|
return -1;
|
|
}
|
|
return cmds[i].func(argc - 1, argv + 1);
|
|
}
|
|
}
|
|
|
|
help(argc - 1, argv + 1);
|
|
|
|
return -1;
|
|
}
|
|
|
|
bool is_prefix(const char *pfx, const char *str)
|
|
{
|
|
if (!pfx)
|
|
return false;
|
|
if (strlen(str) < strlen(pfx))
|
|
return false;
|
|
|
|
return !memcmp(str, pfx, strlen(pfx));
|
|
}
|
|
|
|
/* Last argument MUST be NULL pointer */
|
|
int detect_common_prefix(const char *arg, ...)
|
|
{
|
|
unsigned int count = 0;
|
|
const char *ref;
|
|
char msg[256];
|
|
va_list ap;
|
|
|
|
snprintf(msg, sizeof(msg), "ambiguous prefix: '%s' could be '", arg);
|
|
va_start(ap, arg);
|
|
while ((ref = va_arg(ap, const char *))) {
|
|
if (!is_prefix(arg, ref))
|
|
continue;
|
|
count++;
|
|
if (count > 1)
|
|
strncat(msg, "' or '", sizeof(msg) - strlen(msg) - 1);
|
|
strncat(msg, ref, sizeof(msg) - strlen(msg) - 1);
|
|
}
|
|
va_end(ap);
|
|
strncat(msg, "'", sizeof(msg) - strlen(msg) - 1);
|
|
|
|
if (count >= 2) {
|
|
p_err("%s", msg);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep)
|
|
{
|
|
unsigned char *data = arg;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
const char *pfx = "";
|
|
|
|
if (!i)
|
|
/* nothing */;
|
|
else if (!(i % 16))
|
|
fprintf(f, "\n");
|
|
else if (!(i % 8))
|
|
fprintf(f, " ");
|
|
else
|
|
pfx = sep;
|
|
|
|
fprintf(f, "%s%02hhx", i ? pfx : "", data[i]);
|
|
}
|
|
}
|
|
|
|
/* Split command line into argument vector. */
|
|
static int make_args(char *line, char *n_argv[], int maxargs, int cmd_nb)
|
|
{
|
|
static const char ws[] = " \t\r\n";
|
|
char *cp = line;
|
|
int n_argc = 0;
|
|
|
|
while (*cp) {
|
|
/* Skip leading whitespace. */
|
|
cp += strspn(cp, ws);
|
|
|
|
if (*cp == '\0')
|
|
break;
|
|
|
|
if (n_argc >= (maxargs - 1)) {
|
|
p_err("too many arguments to command %d", cmd_nb);
|
|
return -1;
|
|
}
|
|
|
|
/* Word begins with quote. */
|
|
if (*cp == '\'' || *cp == '"') {
|
|
char quote = *cp++;
|
|
|
|
n_argv[n_argc++] = cp;
|
|
/* Find ending quote. */
|
|
cp = strchr(cp, quote);
|
|
if (!cp) {
|
|
p_err("unterminated quoted string in command %d",
|
|
cmd_nb);
|
|
return -1;
|
|
}
|
|
} else {
|
|
n_argv[n_argc++] = cp;
|
|
|
|
/* Find end of word. */
|
|
cp += strcspn(cp, ws);
|
|
if (*cp == '\0')
|
|
break;
|
|
}
|
|
|
|
/* Separate words. */
|
|
*cp++ = 0;
|
|
}
|
|
n_argv[n_argc] = NULL;
|
|
|
|
return n_argc;
|
|
}
|
|
|
|
static int do_batch(int argc, char **argv);
|
|
|
|
static const struct cmd cmds[] = {
|
|
{ "help", do_help },
|
|
{ "batch", do_batch },
|
|
{ "prog", do_prog },
|
|
{ "map", do_map },
|
|
{ "link", do_link },
|
|
{ "cgroup", do_cgroup },
|
|
{ "perf", do_perf },
|
|
{ "net", do_net },
|
|
{ "feature", do_feature },
|
|
{ "btf", do_btf },
|
|
{ "gen", do_gen },
|
|
{ "struct_ops", do_struct_ops },
|
|
{ "iter", do_iter },
|
|
{ "version", do_version },
|
|
{ 0 }
|
|
};
|
|
|
|
static int do_batch(int argc, char **argv)
|
|
{
|
|
char buf[BATCH_LINE_LEN_MAX], contline[BATCH_LINE_LEN_MAX];
|
|
char *n_argv[BATCH_ARG_NB_MAX];
|
|
unsigned int lines = 0;
|
|
int n_argc;
|
|
FILE *fp;
|
|
char *cp;
|
|
int err = 0;
|
|
int i;
|
|
|
|
if (argc < 2) {
|
|
p_err("too few parameters for batch");
|
|
return -1;
|
|
} else if (!is_prefix(*argv, "file")) {
|
|
p_err("expected 'file', got: %s", *argv);
|
|
return -1;
|
|
} else if (argc > 2) {
|
|
p_err("too many parameters for batch");
|
|
return -1;
|
|
}
|
|
NEXT_ARG();
|
|
|
|
if (!strcmp(*argv, "-"))
|
|
fp = stdin;
|
|
else
|
|
fp = fopen(*argv, "r");
|
|
if (!fp) {
|
|
p_err("Can't open file (%s): %s", *argv, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_start_array(json_wtr);
|
|
while (fgets(buf, sizeof(buf), fp)) {
|
|
cp = strchr(buf, '#');
|
|
if (cp)
|
|
*cp = '\0';
|
|
|
|
if (strlen(buf) == sizeof(buf) - 1) {
|
|
errno = E2BIG;
|
|
break;
|
|
}
|
|
|
|
/* Append continuation lines if any (coming after a line ending
|
|
* with '\' in the batch file).
|
|
*/
|
|
while ((cp = strstr(buf, "\\\n")) != NULL) {
|
|
if (!fgets(contline, sizeof(contline), fp) ||
|
|
strlen(contline) == 0) {
|
|
p_err("missing continuation line on command %d",
|
|
lines);
|
|
err = -1;
|
|
goto err_close;
|
|
}
|
|
|
|
cp = strchr(contline, '#');
|
|
if (cp)
|
|
*cp = '\0';
|
|
|
|
if (strlen(buf) + strlen(contline) + 1 > sizeof(buf)) {
|
|
p_err("command %d is too long", lines);
|
|
err = -1;
|
|
goto err_close;
|
|
}
|
|
buf[strlen(buf) - 2] = '\0';
|
|
strcat(buf, contline);
|
|
}
|
|
|
|
n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines);
|
|
if (!n_argc)
|
|
continue;
|
|
if (n_argc < 0) {
|
|
err = n_argc;
|
|
goto err_close;
|
|
}
|
|
|
|
if (json_output) {
|
|
jsonw_start_object(json_wtr);
|
|
jsonw_name(json_wtr, "command");
|
|
jsonw_start_array(json_wtr);
|
|
for (i = 0; i < n_argc; i++)
|
|
jsonw_string(json_wtr, n_argv[i]);
|
|
jsonw_end_array(json_wtr);
|
|
jsonw_name(json_wtr, "output");
|
|
}
|
|
|
|
err = cmd_select(cmds, n_argc, n_argv, do_help);
|
|
|
|
if (json_output)
|
|
jsonw_end_object(json_wtr);
|
|
|
|
if (err)
|
|
goto err_close;
|
|
|
|
lines++;
|
|
}
|
|
|
|
if (errno && errno != ENOENT) {
|
|
p_err("reading batch file failed: %s", strerror(errno));
|
|
err = -1;
|
|
} else {
|
|
if (!json_output)
|
|
printf("processed %d commands\n", lines);
|
|
}
|
|
err_close:
|
|
if (fp != stdin)
|
|
fclose(fp);
|
|
|
|
if (json_output)
|
|
jsonw_end_array(json_wtr);
|
|
|
|
return err;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
static const struct option options[] = {
|
|
{ "json", no_argument, NULL, 'j' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "pretty", no_argument, NULL, 'p' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ "bpffs", no_argument, NULL, 'f' },
|
|
{ "mapcompat", no_argument, NULL, 'm' },
|
|
{ "nomount", no_argument, NULL, 'n' },
|
|
{ "debug", no_argument, NULL, 'd' },
|
|
{ "use-loader", no_argument, NULL, 'L' },
|
|
{ "base-btf", required_argument, NULL, 'B' },
|
|
{ "legacy", no_argument, NULL, 'l' },
|
|
{ 0 }
|
|
};
|
|
bool version_requested = false;
|
|
int opt, ret;
|
|
|
|
setlinebuf(stdout);
|
|
|
|
last_do_help = do_help;
|
|
pretty_output = false;
|
|
json_output = false;
|
|
show_pinned = false;
|
|
block_mount = false;
|
|
bin_name = argv[0];
|
|
|
|
opterr = 0;
|
|
while ((opt = getopt_long(argc, argv, "VhpjfLmndB:l",
|
|
options, NULL)) >= 0) {
|
|
switch (opt) {
|
|
case 'V':
|
|
version_requested = true;
|
|
break;
|
|
case 'h':
|
|
return do_help(argc, argv);
|
|
case 'p':
|
|
pretty_output = true;
|
|
/* fall through */
|
|
case 'j':
|
|
if (!json_output) {
|
|
json_wtr = jsonw_new(stdout);
|
|
if (!json_wtr) {
|
|
p_err("failed to create JSON writer");
|
|
return -1;
|
|
}
|
|
json_output = true;
|
|
}
|
|
jsonw_pretty(json_wtr, pretty_output);
|
|
break;
|
|
case 'f':
|
|
show_pinned = true;
|
|
break;
|
|
case 'm':
|
|
relaxed_maps = true;
|
|
break;
|
|
case 'n':
|
|
block_mount = true;
|
|
break;
|
|
case 'd':
|
|
libbpf_set_print(print_all_levels);
|
|
verifier_logs = true;
|
|
break;
|
|
case 'B':
|
|
base_btf = btf__parse(optarg, NULL);
|
|
if (libbpf_get_error(base_btf)) {
|
|
p_err("failed to parse base BTF at '%s': %ld\n",
|
|
optarg, libbpf_get_error(base_btf));
|
|
base_btf = NULL;
|
|
return -1;
|
|
}
|
|
break;
|
|
case 'L':
|
|
use_loader = true;
|
|
break;
|
|
case 'l':
|
|
legacy_libbpf = true;
|
|
break;
|
|
default:
|
|
p_err("unrecognized option '%s'", argv[optind - 1]);
|
|
if (json_output)
|
|
clean_and_exit(-1);
|
|
else
|
|
usage();
|
|
}
|
|
}
|
|
|
|
if (!legacy_libbpf) {
|
|
/* Allow legacy map definitions for skeleton generation.
|
|
* It will still be rejected if users use LIBBPF_STRICT_ALL
|
|
* mode for loading generated skeleton.
|
|
*/
|
|
libbpf_set_strict_mode(LIBBPF_STRICT_ALL & ~LIBBPF_STRICT_MAP_DEFINITIONS);
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc < 0)
|
|
usage();
|
|
|
|
if (version_requested)
|
|
return do_version(argc, argv);
|
|
|
|
ret = cmd_select(cmds, argc, argv, do_help);
|
|
|
|
if (json_output)
|
|
jsonw_destroy(&json_wtr);
|
|
|
|
btf__free(base_btf);
|
|
|
|
return ret;
|
|
}
|