security/keys/sysctl.c

   1 /* Key management controls
   2  *
   3  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12 #include <linux/key.h>
  13 #include <linux/sysctl.h>
  14 #include "internal.h"
  15
  16 static const int zero, one = 1, max = INT_MAX;
  17
  18 struct ctl_table key_sysctls[] = {
  19         {
  20                 .procname = "maxkeys",
  21                 .data = &key_quota_maxkeys,
  22                 .maxlen = sizeof(unsigned),
  23                 .mode = 0644,
  24                 .proc_handler = proc_dointvec_minmax,
  25                 .extra1 = (void *) &one,
  26                 .extra2 = (void *) &max,
  27         },
  28         {
  29                 .procname = "maxbytes",
  30                 .data = &key_quota_maxbytes,
  31                 .maxlen = sizeof(unsigned),
  32                 .mode = 0644,
  33                 .proc_handler = proc_dointvec_minmax,
  34                 .extra1 = (void *) &one,
  35                 .extra2 = (void *) &max,
  36         },
  37         {
  38                 .procname = "root_maxkeys",
  39                 .data = &key_quota_root_maxkeys,
  40                 .maxlen = sizeof(unsigned),
  41                 .mode = 0644,
  42                 .proc_handler = proc_dointvec_minmax,
  43                 .extra1 = (void *) &one,
  44                 .extra2 = (void *) &max,
  45         },
  46         {
  47                 .procname = "root_maxbytes",
  48                 .data = &key_quota_root_maxbytes,
  49                 .maxlen = sizeof(unsigned),
  50                 .mode = 0644,
  51                 .proc_handler = proc_dointvec_minmax,
  52                 .extra1 = (void *) &one,
  53                 .extra2 = (void *) &max,
  54         },
  55         {
  56                 .procname = "gc_delay",
  57                 .data = &key_gc_delay,
  58                 .maxlen = sizeof(unsigned),
  59                 .mode = 0644,
  60                 .proc_handler = proc_dointvec_minmax,
  61                 .extra1 = (void *) &zero,
  62                 .extra2 = (void *) &max,
  63         },
  64 #ifdef CONFIG_PERSISTENT_KEYRINGS
  65         {
  66                 .procname = "persistent_keyring_expiry",
  67                 .data = &persistent_keyring_expiry,
  68                 .maxlen = sizeof(unsigned),
  69                 .mode = 0644,
  70                 .proc_handler = proc_dointvec_minmax,
  71                 .extra1 = (void *) &zero,
  72                 .extra2 = (void *) &max,
  73         },
  74 #endif
  75         { }
  76 };