1 // SPDX-License-Identifier: GPL-2.0
2
3 /*
4 * Copyright (C) 2022 Huawei Technologies Duesseldorf GmbH
5 *
6 * Author: Roberto Sassu <roberto.sassu@huawei.com>
7 */
8
9 #include <linux/keyctl.h>
10 #include <test_progs.h>
11
12 #include "test_lookup_key.skel.h"
13
14 #define KEY_LOOKUP_CREATE 0x01
15 #define KEY_LOOKUP_PARTIAL 0x02
16
17 static bool kfunc_not_supported;
18
19 static int libbpf_print_cb(enum libbpf_print_level level, const char *fmt,
20 va_list args)
21 {
22 char *func;
23
24 if (strcmp(fmt, "libbpf: extern (func ksym) '%s': not found in kernel or module BTFs\n"))
25 return 0;
26
27 func = va_arg(args, char *);
28
29 if (strcmp(func, "bpf_lookup_user_key") && strcmp(func, "bpf_key_put") &&
30 strcmp(func, "bpf_lookup_system_key"))
31 return 0;
32
33 kfunc_not_supported = true;
34 return 0;
35 }
36
37 void test_lookup_key(void)
38 {
39 libbpf_print_fn_t old_print_cb;
40 struct test_lookup_key *skel;
41 __u32 next_id;
42 int ret;
43
44 skel = test_lookup_key__open();
45 if (!ASSERT_OK_PTR(skel, "test_lookup_key__open"))
46 return;
47
48 old_print_cb = libbpf_set_print(libbpf_print_cb);
49 ret = test_lookup_key__load(skel);
50 libbpf_set_print(old_print_cb);
51
52 if (ret < 0 && kfunc_not_supported) {
53 printf("%s:SKIP:bpf_lookup_*_key(), bpf_key_put() kfuncs not supported\n",
54 __func__);
55 test__skip();
56 goto close_prog;
57 }
58
59 if (!ASSERT_OK(ret, "test_lookup_key__load"))
60 goto close_prog;
61
62 ret = test_lookup_key__attach(skel);
63 if (!ASSERT_OK(ret, "test_lookup_key__attach"))
64 goto close_prog;
65
66 skel->bss->monitored_pid = getpid();
67 skel->bss->key_serial = KEY_SPEC_THREAD_KEYRING;
68
69 /* The thread-specific keyring does not exist, this test fails. */
70 skel->bss->flags = 0;
71
72 ret = bpf_prog_get_next_id(0, &next_id);
73 if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
74 goto close_prog;
75
76 /* Force creation of the thread-specific keyring, this test succeeds. */
77 skel->bss->flags = KEY_LOOKUP_CREATE;
78
79 ret = bpf_prog_get_next_id(0, &next_id);
80 if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
81 goto close_prog;
82
83 /* Pass both lookup flags for parameter validation. */
84 skel->bss->flags = KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL;
85
86 ret = bpf_prog_get_next_id(0, &next_id);
87 if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
88 goto close_prog;
89
90 /* Pass invalid flags. */
91 skel->bss->flags = UINT64_MAX;
92
93 ret = bpf_prog_get_next_id(0, &next_id);
94 if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
95 goto close_prog;
96
97 skel->bss->key_serial = 0;
98 skel->bss->key_id = 1;
99
100 ret = bpf_prog_get_next_id(0, &next_id);
101 if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
102 goto close_prog;
103
104 skel->bss->key_id = UINT32_MAX;
105
106 ret = bpf_prog_get_next_id(0, &next_id);
107 ASSERT_LT(ret, 0, "bpf_prog_get_next_id");
108
109 close_prog:
110 skel->bss->monitored_pid = 0;
111 test_lookup_key__destroy(skel);
112 }
113
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