// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2023 Bytedance */

#include <sys/syscall.h>
#include <test_progs.h>
#include <cgroup_helpers.h>
#include "test_task_under_cgroup.skel.h"

#define FOO     "/foo"

void test_task_under_cgroup(void)
{
        struct test_task_under_cgroup *skel;
        int ret, foo;
        pid_t pid;

        foo = test__join_cgroup(FOO);
        if (!ASSERT_OK(foo < 0, "cgroup_join_foo"))
                return;

        skel = test_task_under_cgroup__open();
        if (!ASSERT_OK_PTR(skel, "test_task_under_cgroup__open"))
                goto cleanup;

        skel->rodata->local_pid = getpid();
        skel->bss->remote_pid = getpid();
        skel->rodata->cgid = get_cgroup_id(FOO);

        ret = test_task_under_cgroup__load(skel);
        if (!ASSERT_OK(ret, "test_task_under_cgroup__load"))
                goto cleanup;

        /* First, attach the LSM program, and then it will be triggered when the
         * TP_BTF program is attached.
         */
        skel->links.lsm_run = bpf_program__attach_lsm(skel->progs.lsm_run);
        if (!ASSERT_OK_PTR(skel->links.lsm_run, "attach_lsm"))
                goto cleanup;

        skel->links.tp_btf_run = bpf_program__attach_trace(skel->progs.tp_btf_run);
        if (!ASSERT_OK_PTR(skel->links.tp_btf_run, "attach_tp_btf"))
                goto cleanup;

        pid = fork();
        if (pid == 0)
                exit(0);

        ret = (pid == -1);
        if (ASSERT_OK(ret, "fork process"))
                wait(NULL);

        test_task_under_cgroup__detach(skel);

        ASSERT_NEQ(skel->bss->remote_pid, skel->rodata->local_pid,
                   "test task_under_cgroup");

cleanup:
        test_task_under_cgroup__destroy(skel);
        close(foo);
}