1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Key management controls
3 *
4 * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/key.h>
9 #include <linux/sysctl.h>
10 #include "internal.h"
11
12 static struct ctl_table key_sysctls[] = {
13 {
14 .procname = "maxkeys",
15 .data = &key_quota_maxkeys,
16 .maxlen = sizeof(unsigned),
17 .mode = 0644,
18 .proc_handler = proc_dointvec_minmax,
19 .extra1 = (void *) SYSCTL_ONE,
20 .extra2 = (void *) SYSCTL_INT_MAX,
21 },
22 {
23 .procname = "maxbytes",
24 .data = &key_quota_maxbytes,
25 .maxlen = sizeof(unsigned),
26 .mode = 0644,
27 .proc_handler = proc_dointvec_minmax,
28 .extra1 = (void *) SYSCTL_ONE,
29 .extra2 = (void *) SYSCTL_INT_MAX,
30 },
31 {
32 .procname = "root_maxkeys",
33 .data = &key_quota_root_maxkeys,
34 .maxlen = sizeof(unsigned),
35 .mode = 0644,
36 .proc_handler = proc_dointvec_minmax,
37 .extra1 = (void *) SYSCTL_ONE,
38 .extra2 = (void *) SYSCTL_INT_MAX,
39 },
40 {
41 .procname = "root_maxbytes",
42 .data = &key_quota_root_maxbytes,
43 .maxlen = sizeof(unsigned),
44 .mode = 0644,
45 .proc_handler = proc_dointvec_minmax,
46 .extra1 = (void *) SYSCTL_ONE,
47 .extra2 = (void *) SYSCTL_INT_MAX,
48 },
49 {
50 .procname = "gc_delay",
51 .data = &key_gc_delay,
52 .maxlen = sizeof(unsigned),
53 .mode = 0644,
54 .proc_handler = proc_dointvec_minmax,
55 .extra1 = (void *) SYSCTL_ZERO,
56 .extra2 = (void *) SYSCTL_INT_MAX,
57 },
58 #ifdef CONFIG_PERSISTENT_KEYRINGS
59 {
60 .procname = "persistent_keyring_expiry",
61 .data = &persistent_keyring_expiry,
62 .maxlen = sizeof(unsigned),
63 .mode = 0644,
64 .proc_handler = proc_dointvec_minmax,
65 .extra1 = (void *) SYSCTL_ZERO,
66 .extra2 = (void *) SYSCTL_INT_MAX,
67 },
68 #endif
69 };
70
71 static int __init init_security_keys_sysctls(void)
72 {
73 register_sysctl_init("kernel/keys", key_sysctls);
74 return 0;
75 }
76 early_initcall(init_security_keys_sysctls);
77
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