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/* 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>
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");
}
#define DEFINE_PRINT_FN(name, enabled) \
static int libbpf_##name(const char *fmt, ...) \
{ \
va_list args; \
int ret; \
\
va_start(args, fmt); \
if (enabled) { \
fprintf(stderr, "[" #name "] "); \
ret = vfprintf(stderr, fmt, args); \
} \
va_end(args); \
return ret; \
}
DEFINE_PRINT_FN(warning, 1)
DEFINE_PRINT_FN(info, 1)
DEFINE_PRINT_FN(debug, 1)
#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_map__for_each(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_warning, libbpf_info, NULL);
/* Parse commands line args */
while ((opt = getopt_long(argc, argv, "hDq",
long_options, &longindex)) != -1) {
switch (opt) {
case 'D':
libbpf_set_print(libbpf_warning, libbpf_info,
libbpf_debug);
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);
}
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