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Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / tools / testing / selftests / bpf / prog_tests / udp_limit.c
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
8 void 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
62 close_skeleton:
63         if (fd1 >= 0)
64                 close(fd1);
65         if (fd2 >= 0)
66                 close(fd2);
67         udp_limit__destroy(skel);
68 close_cgroup_fd:
69         close(cgroup_fd);
70 }
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