145 строки
3.1 KiB
C
145 строки
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0
|
|
* Copyright (c) 2018 Jesper Dangaard Brouer, Red Hat Inc.
|
|
*/
|
|
static const char *__doc__ =
|
|
"Libbpf test program for loading BPF ELF object files";
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <bpf/libbpf.h>
|
|
#include <getopt.h>
|
|
|
|
#include "bpf_rlimit.h"
|
|
|
|
static const struct option long_options[] = {
|
|
{"help", no_argument, NULL, 'h' },
|
|
{"debug", no_argument, NULL, 'D' },
|
|
{"quiet", no_argument, NULL, 'q' },
|
|
{0, 0, NULL, 0 }
|
|
};
|
|
|
|
static void usage(char *argv[])
|
|
{
|
|
int i;
|
|
|
|
printf("\nDOCUMENTATION:\n%s\n\n", __doc__);
|
|
printf(" Usage: %s (options-see-below) BPF_FILE\n", argv[0]);
|
|
printf(" Listing options:\n");
|
|
for (i = 0; long_options[i].name != 0; i++) {
|
|
printf(" --%-12s", long_options[i].name);
|
|
printf(" short-option: -%c",
|
|
long_options[i].val);
|
|
printf("\n");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
static bool debug = 0;
|
|
static int libbpf_debug_print(enum libbpf_print_level level,
|
|
const char *fmt, va_list args)
|
|
{
|
|
if (level == LIBBPF_DEBUG && !debug)
|
|
return 0;
|
|
|
|
fprintf(stderr, "[%d] ", level);
|
|
return vfprintf(stderr, fmt, args);
|
|
}
|
|
|
|
#define EXIT_FAIL_LIBBPF EXIT_FAILURE
|
|
#define EXIT_FAIL_OPTION 2
|
|
|
|
int test_walk_progs(struct bpf_object *obj, bool verbose)
|
|
{
|
|
struct bpf_program *prog;
|
|
int cnt = 0;
|
|
|
|
bpf_object__for_each_program(prog, obj) {
|
|
cnt++;
|
|
if (verbose)
|
|
printf("Prog (count:%d) section_name: %s\n", cnt,
|
|
bpf_program__title(prog, false));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int test_walk_maps(struct bpf_object *obj, bool verbose)
|
|
{
|
|
struct bpf_map *map;
|
|
int cnt = 0;
|
|
|
|
bpf_object__for_each_map(map, obj) {
|
|
cnt++;
|
|
if (verbose)
|
|
printf("Map (count:%d) name: %s\n", cnt,
|
|
bpf_map__name(map));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int test_open_file(char *filename, bool verbose)
|
|
{
|
|
struct bpf_object *bpfobj = NULL;
|
|
long err;
|
|
|
|
if (verbose)
|
|
printf("Open BPF ELF-file with libbpf: %s\n", filename);
|
|
|
|
/* Load BPF ELF object file and check for errors */
|
|
bpfobj = bpf_object__open(filename);
|
|
err = libbpf_get_error(bpfobj);
|
|
if (err) {
|
|
char err_buf[128];
|
|
libbpf_strerror(err, err_buf, sizeof(err_buf));
|
|
if (verbose)
|
|
printf("Unable to load eBPF objects in file '%s': %s\n",
|
|
filename, err_buf);
|
|
return EXIT_FAIL_LIBBPF;
|
|
}
|
|
test_walk_progs(bpfobj, verbose);
|
|
test_walk_maps(bpfobj, verbose);
|
|
|
|
if (verbose)
|
|
printf("Close BPF ELF-file with libbpf: %s\n",
|
|
bpf_object__name(bpfobj));
|
|
bpf_object__close(bpfobj);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char filename[1024] = { 0 };
|
|
bool verbose = 1;
|
|
int longindex = 0;
|
|
int opt;
|
|
|
|
libbpf_set_print(libbpf_debug_print);
|
|
|
|
/* Parse commands line args */
|
|
while ((opt = getopt_long(argc, argv, "hDq",
|
|
long_options, &longindex)) != -1) {
|
|
switch (opt) {
|
|
case 'D':
|
|
debug = 1;
|
|
break;
|
|
case 'q': /* Use in scripting mode */
|
|
verbose = 0;
|
|
break;
|
|
case 'h':
|
|
default:
|
|
usage(argv);
|
|
return EXIT_FAIL_OPTION;
|
|
}
|
|
}
|
|
if (optind >= argc) {
|
|
usage(argv);
|
|
printf("ERROR: Expected BPF_FILE argument after options\n");
|
|
return EXIT_FAIL_OPTION;
|
|
}
|
|
snprintf(filename, sizeof(filename), "%s", argv[optind]);
|
|
|
|
return test_open_file(filename, verbose);
|
|
}
|