sk_storage_omem_uncharge.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2023 Facebook */
 3#include <test_progs.h>
 4#include <bpf/libbpf.h>
 5#include <sys/types.h>
 6#include <sys/socket.h>
 7#include "sk_storage_omem_uncharge.skel.h"
 8
 9void test_sk_storage_omem_uncharge(void)
10{
11	struct sk_storage_omem_uncharge *skel;
12	int sk_fd = -1, map_fd, err, value;
13	socklen_t optlen;
14
15	skel = sk_storage_omem_uncharge__open_and_load();
16	if (!ASSERT_OK_PTR(skel, "skel open_and_load"))
17		return;
18	map_fd = bpf_map__fd(skel->maps.sk_storage);
19
20	/* A standalone socket not binding to addr:port,
21	 * so nentns is not needed.
22	 */
23	sk_fd = socket(AF_INET6, SOCK_STREAM, 0);
24	if (!ASSERT_GE(sk_fd, 0, "socket"))
25		goto done;
26
27	optlen = sizeof(skel->bss->cookie);
28	err = getsockopt(sk_fd, SOL_SOCKET, SO_COOKIE, &skel->bss->cookie, &optlen);
29	if (!ASSERT_OK(err, "getsockopt(SO_COOKIE)"))
30		goto done;
31
32	value = 0;
33	err = bpf_map_update_elem(map_fd, &sk_fd, &value, 0);
34	if (!ASSERT_OK(err, "bpf_map_update_elem(value=0)"))
35		goto done;
36
37	value = 0xdeadbeef;
38	err = bpf_map_update_elem(map_fd, &sk_fd, &value, 0);
39	if (!ASSERT_OK(err, "bpf_map_update_elem(value=0xdeadbeef)"))
40		goto done;
41
42	err = sk_storage_omem_uncharge__attach(skel);
43	if (!ASSERT_OK(err, "attach"))
44		goto done;
45
46	close(sk_fd);
47	sk_fd = -1;
48
49	ASSERT_EQ(skel->bss->cookie_found, 2, "cookie_found");
50	ASSERT_EQ(skel->bss->omem, 0, "omem");
51
52done:
53	sk_storage_omem_uncharge__destroy(skel);
54	if (sk_fd != -1)
55		close(sk_fd);
56}