fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / security / keys / compat.c
blobe10ec995f2751101d39a7dfbd145cd8ce52cc6ee
1 /* compat.c: 32-bit compatibility syscall for 64-bit systems
3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #include <linux/syscalls.h>
13 #include <linux/keyctl.h>
14 #include <linux/compat.h>
15 #include "internal.h"
17 /*****************************************************************************/
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
25 asmlinkage long compat_sys_keyctl(u32 option,
26 u32 arg2, u32 arg3, u32 arg4, u32 arg5)
28 switch (option) {
29 case KEYCTL_GET_KEYRING_ID:
30 return keyctl_get_keyring_ID(arg2, arg3);
32 case KEYCTL_JOIN_SESSION_KEYRING:
33 return keyctl_join_session_keyring(compat_ptr(arg2));
35 case KEYCTL_UPDATE:
36 return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
38 case KEYCTL_REVOKE:
39 return keyctl_revoke_key(arg2);
41 case KEYCTL_DESCRIBE:
42 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
44 case KEYCTL_CLEAR:
45 return keyctl_keyring_clear(arg2);
47 case KEYCTL_LINK:
48 return keyctl_keyring_link(arg2, arg3);
50 case KEYCTL_UNLINK:
51 return keyctl_keyring_unlink(arg2, arg3);
53 case KEYCTL_SEARCH:
54 return keyctl_keyring_search(arg2, compat_ptr(arg3),
55 compat_ptr(arg4), arg5);
57 case KEYCTL_READ:
58 return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
60 case KEYCTL_CHOWN:
61 return keyctl_chown_key(arg2, arg3, arg4);
63 case KEYCTL_SETPERM:
64 return keyctl_setperm_key(arg2, arg3);
66 case KEYCTL_INSTANTIATE:
67 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
68 arg5);
70 case KEYCTL_NEGATE:
71 return keyctl_negate_key(arg2, arg3, arg4);
73 case KEYCTL_SET_REQKEY_KEYRING:
74 return keyctl_set_reqkey_keyring(arg2);
76 case KEYCTL_SET_TIMEOUT:
77 return keyctl_set_timeout(arg2, arg3);
79 case KEYCTL_ASSUME_AUTHORITY:
80 return keyctl_assume_authority(arg2);
82 default:
83 return -EOPNOTSUPP;
86 } /* end compat_sys_keyctl() */