]> Git Repo - J-linux.git/blob - tools/testing/selftests/bpf/prog_tests/task_under_cgroup.c
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 / task_under_cgroup.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2023 Bytedance */
3
4 #include <sys/syscall.h>
5 #include <test_progs.h>
6 #include <cgroup_helpers.h>
7 #include "test_task_under_cgroup.skel.h"
8
9 #define FOO     "/foo"
10
11 void test_task_under_cgroup(void)
12 {
13         struct test_task_under_cgroup *skel;
14         int ret, foo;
15         pid_t pid;
16
17         foo = test__join_cgroup(FOO);
18         if (!ASSERT_OK(foo < 0, "cgroup_join_foo"))
19                 return;
20
21         skel = test_task_under_cgroup__open();
22         if (!ASSERT_OK_PTR(skel, "test_task_under_cgroup__open"))
23                 goto cleanup;
24
25         skel->rodata->local_pid = getpid();
26         skel->bss->remote_pid = getpid();
27         skel->rodata->cgid = get_cgroup_id(FOO);
28
29         ret = test_task_under_cgroup__load(skel);
30         if (!ASSERT_OK(ret, "test_task_under_cgroup__load"))
31                 goto cleanup;
32
33         /* First, attach the LSM program, and then it will be triggered when the
34          * TP_BTF program is attached.
35          */
36         skel->links.lsm_run = bpf_program__attach_lsm(skel->progs.lsm_run);
37         if (!ASSERT_OK_PTR(skel->links.lsm_run, "attach_lsm"))
38                 goto cleanup;
39
40         skel->links.tp_btf_run = bpf_program__attach_trace(skel->progs.tp_btf_run);
41         if (!ASSERT_OK_PTR(skel->links.tp_btf_run, "attach_tp_btf"))
42                 goto cleanup;
43
44         pid = fork();
45         if (pid == 0)
46                 exit(0);
47
48         ret = (pid == -1);
49         if (ASSERT_OK(ret, "fork process"))
50                 wait(NULL);
51
52         test_task_under_cgroup__detach(skel);
53
54         ASSERT_NEQ(skel->bss->remote_pid, skel->rodata->local_pid,
55                    "test task_under_cgroup");
56
57 cleanup:
58         test_task_under_cgroup__destroy(skel);
59         close(foo);
60 }
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