1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
 3#include <test_progs.h>
 4#include <sys/mman.h>
 5#include "mmap_inner_array.skel.h"
 6
 7void test_mmap_inner_array(void)
 8{
 9	const long page_size = sysconf(_SC_PAGE_SIZE);
10	struct mmap_inner_array *skel;
11	int inner_array_fd, err;
12	void *tmp;
13	__u64 *val;
14
15	skel = mmap_inner_array__open_and_load();
16
17	if (!ASSERT_OK_PTR(skel, "open_and_load"))
18		return;
19
20	inner_array_fd = bpf_map__fd(skel->maps.inner_array);
21	tmp = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, inner_array_fd, 0);
22	if (!ASSERT_OK_PTR(tmp, "inner array mmap"))
23		goto out;
24	val = (void *)tmp;
25
26	err = mmap_inner_array__attach(skel);
27	if (!ASSERT_OK(err, "attach"))
28		goto out_unmap;
29
30	skel->bss->pid = getpid();
31	usleep(1);
32
33	/* pid is set, pid_match == true and outer_map_match == false */
34	ASSERT_TRUE(skel->bss->pid_match, "pid match 1");
35	ASSERT_FALSE(skel->bss->outer_map_match, "outer map match 1");
36	ASSERT_FALSE(skel->bss->done, "done 1");
37	ASSERT_EQ(*val, 0, "value match 1");
38
39	err = bpf_map__update_elem(skel->maps.outer_map,
40				   &skel->bss->pid, sizeof(skel->bss->pid),
41				   &inner_array_fd, sizeof(inner_array_fd),
42				   BPF_ANY);
43	if (!ASSERT_OK(err, "update elem"))
44		goto out_unmap;
45	usleep(1);
46
47	/* outer map key is set, outer_map_match == true */
48	ASSERT_TRUE(skel->bss->pid_match, "pid match 2");
49	ASSERT_TRUE(skel->bss->outer_map_match, "outer map match 2");
50	ASSERT_TRUE(skel->bss->done, "done 2");
51	ASSERT_EQ(*val, skel->data->match_value, "value match 2");
52
53out_unmap:
54	munmap(tmp, page_size);
55out:
56	mmap_inner_array__destroy(skel);
57}