1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun /*
4*4882a593Smuzhiyun * Copyright 2020 Google LLC.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <test_progs.h>
8*4882a593Smuzhiyun #include <cgroup_helpers.h>
9*4882a593Smuzhiyun #include <network_helpers.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "metadata_unused.skel.h"
12*4882a593Smuzhiyun #include "metadata_used.skel.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun static int duration;
15*4882a593Smuzhiyun
prog_holds_map(int prog_fd,int map_fd)16*4882a593Smuzhiyun static int prog_holds_map(int prog_fd, int map_fd)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct bpf_prog_info prog_info = {};
19*4882a593Smuzhiyun struct bpf_prog_info map_info = {};
20*4882a593Smuzhiyun __u32 prog_info_len;
21*4882a593Smuzhiyun __u32 map_info_len;
22*4882a593Smuzhiyun __u32 *map_ids;
23*4882a593Smuzhiyun int nr_maps;
24*4882a593Smuzhiyun int ret;
25*4882a593Smuzhiyun int i;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun map_info_len = sizeof(map_info);
28*4882a593Smuzhiyun ret = bpf_obj_get_info_by_fd(map_fd, &map_info, &map_info_len);
29*4882a593Smuzhiyun if (ret)
30*4882a593Smuzhiyun return -errno;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun prog_info_len = sizeof(prog_info);
33*4882a593Smuzhiyun ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
34*4882a593Smuzhiyun if (ret)
35*4882a593Smuzhiyun return -errno;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
38*4882a593Smuzhiyun if (!map_ids)
39*4882a593Smuzhiyun return -ENOMEM;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun nr_maps = prog_info.nr_map_ids;
42*4882a593Smuzhiyun memset(&prog_info, 0, sizeof(prog_info));
43*4882a593Smuzhiyun prog_info.nr_map_ids = nr_maps;
44*4882a593Smuzhiyun prog_info.map_ids = ptr_to_u64(map_ids);
45*4882a593Smuzhiyun prog_info_len = sizeof(prog_info);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun ret = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
48*4882a593Smuzhiyun if (ret) {
49*4882a593Smuzhiyun ret = -errno;
50*4882a593Smuzhiyun goto free_map_ids;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun ret = -ENOENT;
54*4882a593Smuzhiyun for (i = 0; i < prog_info.nr_map_ids; i++) {
55*4882a593Smuzhiyun if (map_ids[i] == map_info.id) {
56*4882a593Smuzhiyun ret = 0;
57*4882a593Smuzhiyun break;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun free_map_ids:
62*4882a593Smuzhiyun free(map_ids);
63*4882a593Smuzhiyun return ret;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
test_metadata_unused(void)66*4882a593Smuzhiyun static void test_metadata_unused(void)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun struct metadata_unused *obj;
69*4882a593Smuzhiyun int err;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun obj = metadata_unused__open_and_load();
72*4882a593Smuzhiyun if (CHECK(!obj, "skel-load", "errno %d", errno))
73*4882a593Smuzhiyun return;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun err = prog_holds_map(bpf_program__fd(obj->progs.prog),
76*4882a593Smuzhiyun bpf_map__fd(obj->maps.rodata));
77*4882a593Smuzhiyun if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
78*4882a593Smuzhiyun return;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun /* Assert that we can access the metadata in skel and the values are
81*4882a593Smuzhiyun * what we expect.
82*4882a593Smuzhiyun */
83*4882a593Smuzhiyun if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "foo",
84*4882a593Smuzhiyun sizeof(obj->rodata->bpf_metadata_a)),
85*4882a593Smuzhiyun "bpf_metadata_a", "expected \"foo\", value differ"))
86*4882a593Smuzhiyun goto close_bpf_object;
87*4882a593Smuzhiyun if (CHECK(obj->rodata->bpf_metadata_b != 1, "bpf_metadata_b",
88*4882a593Smuzhiyun "expected 1, got %d", obj->rodata->bpf_metadata_b))
89*4882a593Smuzhiyun goto close_bpf_object;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun /* Assert that binding metadata map to prog again succeeds. */
92*4882a593Smuzhiyun err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
93*4882a593Smuzhiyun bpf_map__fd(obj->maps.rodata), NULL);
94*4882a593Smuzhiyun CHECK(err, "rebind_map", "errno %d, expected 0", errno);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun close_bpf_object:
97*4882a593Smuzhiyun metadata_unused__destroy(obj);
98*4882a593Smuzhiyun }
99*4882a593Smuzhiyun
test_metadata_used(void)100*4882a593Smuzhiyun static void test_metadata_used(void)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun struct metadata_used *obj;
103*4882a593Smuzhiyun int err;
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun obj = metadata_used__open_and_load();
106*4882a593Smuzhiyun if (CHECK(!obj, "skel-load", "errno %d", errno))
107*4882a593Smuzhiyun return;
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun err = prog_holds_map(bpf_program__fd(obj->progs.prog),
110*4882a593Smuzhiyun bpf_map__fd(obj->maps.rodata));
111*4882a593Smuzhiyun if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
112*4882a593Smuzhiyun return;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun /* Assert that we can access the metadata in skel and the values are
115*4882a593Smuzhiyun * what we expect.
116*4882a593Smuzhiyun */
117*4882a593Smuzhiyun if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "bar",
118*4882a593Smuzhiyun sizeof(obj->rodata->bpf_metadata_a)),
119*4882a593Smuzhiyun "metadata_a", "expected \"bar\", value differ"))
120*4882a593Smuzhiyun goto close_bpf_object;
121*4882a593Smuzhiyun if (CHECK(obj->rodata->bpf_metadata_b != 2, "metadata_b",
122*4882a593Smuzhiyun "expected 2, got %d", obj->rodata->bpf_metadata_b))
123*4882a593Smuzhiyun goto close_bpf_object;
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun /* Assert that binding metadata map to prog again succeeds. */
126*4882a593Smuzhiyun err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
127*4882a593Smuzhiyun bpf_map__fd(obj->maps.rodata), NULL);
128*4882a593Smuzhiyun CHECK(err, "rebind_map", "errno %d, expected 0", errno);
129*4882a593Smuzhiyun
130*4882a593Smuzhiyun close_bpf_object:
131*4882a593Smuzhiyun metadata_used__destroy(obj);
132*4882a593Smuzhiyun }
133*4882a593Smuzhiyun
test_metadata(void)134*4882a593Smuzhiyun void test_metadata(void)
135*4882a593Smuzhiyun {
136*4882a593Smuzhiyun if (test__start_subtest("unused"))
137*4882a593Smuzhiyun test_metadata_unused();
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun if (test__start_subtest("used"))
140*4882a593Smuzhiyun test_metadata_used();
141*4882a593Smuzhiyun }
142