1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3#include "udp_limit.skel.h"
 4
 5#include <sys/types.h>
 6#include <sys/socket.h>
 7
 
 
 8void test_udp_limit(void)
 9{
10	struct udp_limit *skel;
11	int fd1 = -1, fd2 = -1;
12	int cgroup_fd;
13
14	cgroup_fd = test__join_cgroup("/udp_limit");
15	if (!ASSERT_GE(cgroup_fd, 0, "cg-join"))
16		return;
17
18	skel = udp_limit__open_and_load();
19	if (!ASSERT_OK_PTR(skel, "skel-load"))
20		goto close_cgroup_fd;
21
22	skel->links.sock = bpf_program__attach_cgroup(skel->progs.sock, cgroup_fd);
23	if (!ASSERT_OK_PTR(skel->links.sock, "cg_attach_sock"))
24		goto close_skeleton;
25	skel->links.sock_release = bpf_program__attach_cgroup(skel->progs.sock_release, cgroup_fd);
26	if (!ASSERT_OK_PTR(skel->links.sock_release, "cg_attach_sock_release"))
27		goto close_skeleton;
28
29	/* BPF program enforces a single UDP socket per cgroup,
30	 * verify that.
31	 */
32	fd1 = socket(AF_INET, SOCK_DGRAM, 0);
33	if (!ASSERT_GE(fd1, 0, "socket(fd1)"))
34		goto close_skeleton;
35
36	fd2 = socket(AF_INET, SOCK_DGRAM, 0);
37	if (!ASSERT_LT(fd2, 0, "socket(fd2)"))
38		goto close_skeleton;
39
40	/* We can reopen again after close. */
41	close(fd1);
42	fd1 = -1;
43
44	fd1 = socket(AF_INET, SOCK_DGRAM, 0);
45	if (!ASSERT_GE(fd1, 0, "socket(fd1-again)"))
46		goto close_skeleton;
47
48	/* Make sure the program was invoked the expected
49	 * number of times:
50	 * - open fd1           - BPF_CGROUP_INET_SOCK_CREATE
51	 * - attempt to openfd2 - BPF_CGROUP_INET_SOCK_CREATE
52	 * - close fd1          - BPF_CGROUP_INET_SOCK_RELEASE
53	 * - open fd1 again     - BPF_CGROUP_INET_SOCK_CREATE
54	 */
55	if (!ASSERT_EQ(skel->bss->invocations, 4, "bss-invocations"))
 
56		goto close_skeleton;
57
58	/* We should still have a single socket in use */
59	if (!ASSERT_EQ(skel->bss->in_use, 1, "bss-in_use"))
 
60		goto close_skeleton;
61
62close_skeleton:
63	if (fd1 >= 0)
64		close(fd1);
65	if (fd2 >= 0)
66		close(fd2);
67	udp_limit__destroy(skel);
68close_cgroup_fd:
69	close(cgroup_fd);
70}

 1// SPDX-License-Identifier: GPL-2.0
 2#include <test_progs.h>
 3#include "udp_limit.skel.h"
 4
 5#include <sys/types.h>
 6#include <sys/socket.h>
 7
 8static int duration;
 9
10void test_udp_limit(void)
11{
12	struct udp_limit *skel;
13	int fd1 = -1, fd2 = -1;
14	int cgroup_fd;
15
16	cgroup_fd = test__join_cgroup("/udp_limit");
17	if (CHECK(cgroup_fd < 0, "cg-join", "errno %d", errno))
18		return;
19
20	skel = udp_limit__open_and_load();
21	if (CHECK(!skel, "skel-load", "errno %d", errno))
22		goto close_cgroup_fd;
23
24	skel->links.sock = bpf_program__attach_cgroup(skel->progs.sock, cgroup_fd);
25	if (!ASSERT_OK_PTR(skel->links.sock, "cg_attach_sock"))
26		goto close_skeleton;
27	skel->links.sock_release = bpf_program__attach_cgroup(skel->progs.sock_release, cgroup_fd);
28	if (!ASSERT_OK_PTR(skel->links.sock_release, "cg_attach_sock_release"))
29		goto close_skeleton;
30
31	/* BPF program enforces a single UDP socket per cgroup,
32	 * verify that.
33	 */
34	fd1 = socket(AF_INET, SOCK_DGRAM, 0);
35	if (CHECK(fd1 < 0, "fd1", "errno %d", errno))
36		goto close_skeleton;
37
38	fd2 = socket(AF_INET, SOCK_DGRAM, 0);
39	if (CHECK(fd2 >= 0, "fd2", "errno %d", errno))
40		goto close_skeleton;
41
42	/* We can reopen again after close. */
43	close(fd1);
44	fd1 = -1;
45
46	fd1 = socket(AF_INET, SOCK_DGRAM, 0);
47	if (CHECK(fd1 < 0, "fd1-again", "errno %d", errno))
48		goto close_skeleton;
49
50	/* Make sure the program was invoked the expected
51	 * number of times:
52	 * - open fd1           - BPF_CGROUP_INET_SOCK_CREATE
53	 * - attempt to openfd2 - BPF_CGROUP_INET_SOCK_CREATE
54	 * - close fd1          - BPF_CGROUP_INET_SOCK_RELEASE
55	 * - open fd1 again     - BPF_CGROUP_INET_SOCK_CREATE
56	 */
57	if (CHECK(skel->bss->invocations != 4, "bss-invocations",
58		  "invocations=%d", skel->bss->invocations))
59		goto close_skeleton;
60
61	/* We should still have a single socket in use */
62	if (CHECK(skel->bss->in_use != 1, "bss-in_use",
63		  "in_use=%d", skel->bss->in_use))
64		goto close_skeleton;
65
66close_skeleton:
67	if (fd1 >= 0)
68		close(fd1);
69	if (fd2 >= 0)
70		close(fd2);
71	udp_limit__destroy(skel);
72close_cgroup_fd:
73	close(cgroup_fd);
74}