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 }
61
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