mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
b25acdafd3
We have switched to memcg-based memory accouting and thus the rlimit is not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in libbpf for backward compatibility, so we can use it instead now. This patch also removes the useless header sys/resource.h from many files in samples/bpf. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220409125958.92629-2-laoar.shao@gmail.com
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf.h>
|
|
#include <bpf/libbpf.h>
|
|
#include "sock_example.h"
|
|
#include <unistd.h>
|
|
#include <arpa/inet.h>
|
|
|
|
struct pair {
|
|
__u64 packets;
|
|
__u64 bytes;
|
|
};
|
|
|
|
int main(int ac, char **argv)
|
|
{
|
|
struct bpf_program *prog;
|
|
struct bpf_object *obj;
|
|
int map_fd, prog_fd;
|
|
char filename[256];
|
|
int i, sock, err;
|
|
FILE *f;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
|
|
obj = bpf_object__open_file(filename, NULL);
|
|
if (libbpf_get_error(obj))
|
|
return 1;
|
|
|
|
prog = bpf_object__next_program(obj, NULL);
|
|
bpf_program__set_type(prog, BPF_PROG_TYPE_SOCKET_FILTER);
|
|
|
|
err = bpf_object__load(obj);
|
|
if (err)
|
|
return 1;
|
|
|
|
prog_fd = bpf_program__fd(prog);
|
|
map_fd = bpf_object__find_map_fd_by_name(obj, "hash_map");
|
|
|
|
sock = open_raw_sock("lo");
|
|
|
|
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd,
|
|
sizeof(prog_fd)) == 0);
|
|
|
|
f = popen("ping -4 -c5 localhost", "r");
|
|
(void) f;
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
int key = 0, next_key;
|
|
struct pair value;
|
|
|
|
while (bpf_map_get_next_key(map_fd, &key, &next_key) == 0) {
|
|
bpf_map_lookup_elem(map_fd, &next_key, &value);
|
|
printf("ip %s bytes %lld packets %lld\n",
|
|
inet_ntoa((struct in_addr){htonl(next_key)}),
|
|
value.bytes, value.packets);
|
|
key = next_key;
|
|
}
|
|
sleep(1);
|
|
}
|
|
return 0;
|
|
}
|