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
test_mmap_inner_array(void)7 void 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
53 out_unmap:
54 munmap(tmp, page_size);
55 out:
56 mmap_inner_array__destroy(skel);
57 }
58