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