security/keys/compat.c

   1 /* compat.c: 32-bit compatibility syscall for 64-bit systems
   2  *
   3  * Copyright (C) 2004-5 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 License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/syscalls.h>
  13 #include <linux/keyctl.h>
  14 #include <linux/compat.h>
  15 #include "internal.h"
  16
  17 /*****************************************************************************/
  18 /*
  19  * the key control system call, 32-bit compatibility version for 64-bit archs
  20  * - this should only be called if the 64-bit arch uses weird pointers in
  21  *   32-bit mode or doesn't guarantee that the top 32-bits of the argument
  22  *   registers on taking a 32-bit syscall are zero
  23  * - if you can, you should call sys_keyctl directly
  24  */
  25 asmlinkage long compat_sys_keyctl(u32 option,
  26                                   u32 arg2, u32 arg3, u32 arg4, u32 arg5)
  27 {
  28         switch (option) {
  29         case KEYCTL_GET_KEYRING_ID:
  30                 return keyctl_get_keyring_ID(arg2, arg3);
  31
  32         case KEYCTL_JOIN_SESSION_KEYRING:
  33                 return keyctl_join_session_keyring(compat_ptr(arg2));
  34
  35         case KEYCTL_UPDATE:
  36                 return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
  37
  38         case KEYCTL_REVOKE:
  39                 return keyctl_revoke_key(arg2);
  40
  41         case KEYCTL_DESCRIBE:
  42                 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
  43
  44         case KEYCTL_CLEAR:
  45                 return keyctl_keyring_clear(arg2);
  46
  47         case KEYCTL_LINK:
  48                 return keyctl_keyring_link(arg2, arg3);
  49
  50         case KEYCTL_UNLINK:
  51                 return keyctl_keyring_unlink(arg2, arg3);
  52
  53         case KEYCTL_SEARCH:
  54                 return keyctl_keyring_search(arg2, compat_ptr(arg3),
  55                                              compat_ptr(arg4), arg5);
  56
  57         case KEYCTL_READ:
  58                 return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
  59
  60         case KEYCTL_CHOWN:
  61                 return keyctl_chown_key(arg2, arg3, arg4);
  62
  63         case KEYCTL_SETPERM:
  64                 return keyctl_setperm_key(arg2, arg3);
  65
  66         case KEYCTL_INSTANTIATE:
  67                 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
  68                                               arg5);
  69
  70         case KEYCTL_NEGATE:
  71                 return keyctl_negate_key(arg2, arg3, arg4);
  72
  73         case KEYCTL_SET_REQKEY_KEYRING:
  74                 return keyctl_set_reqkey_keyring(arg2);
  75
  76         case KEYCTL_SET_TIMEOUT:
  77                 return keyctl_set_timeout(arg2, arg3);
  78
  79         case KEYCTL_ASSUME_AUTHORITY:
  80                 return keyctl_assume_authority(arg2);
  81
  82         default:
  83                 return -EOPNOTSUPP;
  84         }
  85
  86 } /* end compat_sys_keyctl() */