1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3 
4 #define _GNU_SOURCE
5 #include <sys/wait.h>
6 #include <test_progs.h>
7 #include <unistd.h>
8 
9 #include "task_kfunc_failure.skel.h"
10 #include "task_kfunc_success.skel.h"
11 
12 static struct task_kfunc_success *open_load_task_kfunc_skel(void)
13 {
14 	struct task_kfunc_success *skel;
15 	int err;
16 
17 	skel = task_kfunc_success__open();
18 	if (!ASSERT_OK_PTR(skel, "skel_open"))
19 		return NULL;
20 
21 	skel->bss->pid = getpid();
22 
23 	err = task_kfunc_success__load(skel);
24 	if (!ASSERT_OK(err, "skel_load"))
25 		goto cleanup;
26 
27 	return skel;
28 
29 cleanup:
30 	task_kfunc_success__destroy(skel);
31 	return NULL;
32 }
33 
34 static void run_success_test(const char *prog_name)
35 {
36 	struct task_kfunc_success *skel;
37 	int status;
38 	pid_t child_pid;
39 	struct bpf_program *prog;
40 	struct bpf_link *link = NULL;
41 
42 	skel = open_load_task_kfunc_skel();
43 	if (!ASSERT_OK_PTR(skel, "open_load_skel"))
44 		return;
45 
46 	if (!ASSERT_OK(skel->bss->err, "pre_spawn_err"))
47 		goto cleanup;
48 
49 	prog = bpf_object__find_program_by_name(skel->obj, prog_name);
50 	if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
51 		goto cleanup;
52 
53 	link = bpf_program__attach(prog);
54 	if (!ASSERT_OK_PTR(link, "attached_link"))
55 		goto cleanup;
56 
57 	child_pid = fork();
58 	if (!ASSERT_GT(child_pid, -1, "child_pid"))
59 		goto cleanup;
60 	if (child_pid == 0)
61 		_exit(0);
62 	waitpid(child_pid, &status, 0);
63 
64 	ASSERT_OK(skel->bss->err, "post_wait_err");
65 
66 cleanup:
67 	bpf_link__destroy(link);
68 	task_kfunc_success__destroy(skel);
69 }
70 
71 static const char * const success_tests[] = {
72 	"test_task_acquire_release_argument",
73 	"test_task_acquire_release_current",
74 	"test_task_acquire_leave_in_map",
75 	"test_task_xchg_release",
76 	"test_task_get_release",
77 	"test_task_current_acquire_release",
78 	"test_task_from_pid_arg",
79 	"test_task_from_pid_current",
80 	"test_task_from_pid_invalid",
81 };
82 
83 void test_task_kfunc(void)
84 {
85 	int i;
86 
87 	for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
88 		if (!test__start_subtest(success_tests[i]))
89 			continue;
90 
91 		run_success_test(success_tests[i]);
92 	}
93 
94 	RUN_TESTS(task_kfunc_failure);
95 }
96