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Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / tools / testing / selftests / bpf / prog_tests / metadata.c
1 // SPDX-License-Identifier: GPL-2.0-only
2
3 /*
4  * Copyright 2020 Google LLC.
5  */
6
7 #include <test_progs.h>
8 #include <cgroup_helpers.h>
9 #include <network_helpers.h>
10
11 #include "metadata_unused.skel.h"
12 #include "metadata_used.skel.h"
13
14 static int duration;
15
16 static int prog_holds_map(int prog_fd, int map_fd)
17 {
18         struct bpf_prog_info prog_info = {};
19         struct bpf_map_info map_info = {};
20         __u32 prog_info_len;
21         __u32 map_info_len;
22         __u32 *map_ids;
23         int nr_maps;
24         int ret;
25         int i;
26
27         map_info_len = sizeof(map_info);
28         ret = bpf_map_get_info_by_fd(map_fd, &map_info, &map_info_len);
29         if (ret)
30                 return -errno;
31
32         prog_info_len = sizeof(prog_info);
33         ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
34         if (ret)
35                 return -errno;
36
37         map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
38         if (!map_ids)
39                 return -ENOMEM;
40
41         nr_maps = prog_info.nr_map_ids;
42         memset(&prog_info, 0, sizeof(prog_info));
43         prog_info.nr_map_ids = nr_maps;
44         prog_info.map_ids = ptr_to_u64(map_ids);
45         prog_info_len = sizeof(prog_info);
46
47         ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
48         if (ret) {
49                 ret = -errno;
50                 goto free_map_ids;
51         }
52
53         ret = -ENOENT;
54         for (i = 0; i < prog_info.nr_map_ids; i++) {
55                 if (map_ids[i] == map_info.id) {
56                         ret = 0;
57                         break;
58                 }
59         }
60
61 free_map_ids:
62         free(map_ids);
63         return ret;
64 }
65
66 static void test_metadata_unused(void)
67 {
68         struct metadata_unused *obj;
69         int err;
70
71         obj = metadata_unused__open_and_load();
72         if (CHECK(!obj, "skel-load", "errno %d", errno))
73                 return;
74
75         err = prog_holds_map(bpf_program__fd(obj->progs.prog),
76                              bpf_map__fd(obj->maps.rodata));
77         if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
78                 return;
79
80         /* Assert that we can access the metadata in skel and the values are
81          * what we expect.
82          */
83         if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "foo",
84                           sizeof(obj->rodata->bpf_metadata_a)),
85                   "bpf_metadata_a", "expected \"foo\", value differ"))
86                 goto close_bpf_object;
87         if (CHECK(obj->rodata->bpf_metadata_b != 1, "bpf_metadata_b",
88                   "expected 1, got %d", obj->rodata->bpf_metadata_b))
89                 goto close_bpf_object;
90
91         /* Assert that binding metadata map to prog again succeeds. */
92         err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
93                                 bpf_map__fd(obj->maps.rodata), NULL);
94         CHECK(err, "rebind_map", "errno %d, expected 0", errno);
95
96 close_bpf_object:
97         metadata_unused__destroy(obj);
98 }
99
100 static void test_metadata_used(void)
101 {
102         struct metadata_used *obj;
103         int err;
104
105         obj = metadata_used__open_and_load();
106         if (CHECK(!obj, "skel-load", "errno %d", errno))
107                 return;
108
109         err = prog_holds_map(bpf_program__fd(obj->progs.prog),
110                              bpf_map__fd(obj->maps.rodata));
111         if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
112                 return;
113
114         /* Assert that we can access the metadata in skel and the values are
115          * what we expect.
116          */
117         if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "bar",
118                           sizeof(obj->rodata->bpf_metadata_a)),
119                   "metadata_a", "expected \"bar\", value differ"))
120                 goto close_bpf_object;
121         if (CHECK(obj->rodata->bpf_metadata_b != 2, "metadata_b",
122                   "expected 2, got %d", obj->rodata->bpf_metadata_b))
123                 goto close_bpf_object;
124
125         /* Assert that binding metadata map to prog again succeeds. */
126         err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
127                                 bpf_map__fd(obj->maps.rodata), NULL);
128         CHECK(err, "rebind_map", "errno %d, expected 0", errno);
129
130 close_bpf_object:
131         metadata_used__destroy(obj);
132 }
133
134 void test_metadata(void)
135 {
136         if (test__start_subtest("unused"))
137                 test_metadata_unused();
138
139         if (test__start_subtest("used"))
140                 test_metadata_used();
141 }
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