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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 9 years 8 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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1 | /* 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 <linux/slab.h> |
16 | #include "internal.h" |
17 | |
18 | /* |
19 | * Instantiate a key with the specified compatibility multipart payload and |
20 | * link the key into the destination keyring if one is given. |
21 | * |
22 | * The caller must have the appropriate instantiation permit set for this to |
23 | * work (see keyctl_assume_authority). No other permissions are required. |
24 | * |
25 | * If successful, 0 will be returned. |
26 | */ |
27 | long compat_keyctl_instantiate_key_iov( |
28 | key_serial_t id, |
29 | const struct compat_iovec __user *_payload_iov, |
30 | unsigned ioc, |
31 | key_serial_t ringid) |
32 | { |
33 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
34 | long ret; |
35 | |
36 | if (_payload_iov == 0 || ioc == 0) |
37 | goto no_payload; |
38 | |
39 | ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc, |
40 | ARRAY_SIZE(iovstack), |
41 | iovstack, &iov); |
42 | if (ret < 0) |
43 | return ret; |
44 | if (ret == 0) |
45 | goto no_payload_free; |
46 | |
47 | ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid); |
48 | |
49 | if (iov != iovstack) |
50 | kfree(iov); |
51 | return ret; |
52 | |
53 | no_payload_free: |
54 | if (iov != iovstack) |
55 | kfree(iov); |
56 | no_payload: |
57 | return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid); |
58 | } |
59 | |
60 | /* |
61 | * The key control system call, 32-bit compatibility version for 64-bit archs |
62 | * |
63 | * This should only be called if the 64-bit arch uses weird pointers in 32-bit |
64 | * mode or doesn't guarantee that the top 32-bits of the argument registers on |
65 | * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl() |
66 | * directly. |
67 | */ |
68 | asmlinkage long compat_sys_keyctl(u32 option, |
69 | u32 arg2, u32 arg3, u32 arg4, u32 arg5) |
70 | { |
71 | switch (option) { |
72 | case KEYCTL_GET_KEYRING_ID: |
73 | return keyctl_get_keyring_ID(arg2, arg3); |
74 | |
75 | case KEYCTL_JOIN_SESSION_KEYRING: |
76 | return keyctl_join_session_keyring(compat_ptr(arg2)); |
77 | |
78 | case KEYCTL_UPDATE: |
79 | return keyctl_update_key(arg2, compat_ptr(arg3), arg4); |
80 | |
81 | case KEYCTL_REVOKE: |
82 | return keyctl_revoke_key(arg2); |
83 | |
84 | case KEYCTL_DESCRIBE: |
85 | return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); |
86 | |
87 | case KEYCTL_CLEAR: |
88 | return keyctl_keyring_clear(arg2); |
89 | |
90 | case KEYCTL_LINK: |
91 | return keyctl_keyring_link(arg2, arg3); |
92 | |
93 | case KEYCTL_UNLINK: |
94 | return keyctl_keyring_unlink(arg2, arg3); |
95 | |
96 | case KEYCTL_SEARCH: |
97 | return keyctl_keyring_search(arg2, compat_ptr(arg3), |
98 | compat_ptr(arg4), arg5); |
99 | |
100 | case KEYCTL_READ: |
101 | return keyctl_read_key(arg2, compat_ptr(arg3), arg4); |
102 | |
103 | case KEYCTL_CHOWN: |
104 | return keyctl_chown_key(arg2, arg3, arg4); |
105 | |
106 | case KEYCTL_SETPERM: |
107 | return keyctl_setperm_key(arg2, arg3); |
108 | |
109 | case KEYCTL_INSTANTIATE: |
110 | return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, |
111 | arg5); |
112 | |
113 | case KEYCTL_NEGATE: |
114 | return keyctl_negate_key(arg2, arg3, arg4); |
115 | |
116 | case KEYCTL_SET_REQKEY_KEYRING: |
117 | return keyctl_set_reqkey_keyring(arg2); |
118 | |
119 | case KEYCTL_SET_TIMEOUT: |
120 | return keyctl_set_timeout(arg2, arg3); |
121 | |
122 | case KEYCTL_ASSUME_AUTHORITY: |
123 | return keyctl_assume_authority(arg2); |
124 | |
125 | case KEYCTL_GET_SECURITY: |
126 | return keyctl_get_security(arg2, compat_ptr(arg3), arg4); |
127 | |
128 | case KEYCTL_SESSION_TO_PARENT: |
129 | return keyctl_session_to_parent(); |
130 | |
131 | case KEYCTL_REJECT: |
132 | return keyctl_reject_key(arg2, arg3, arg4, arg5); |
133 | |
134 | case KEYCTL_INSTANTIATE_IOV: |
135 | return compat_keyctl_instantiate_key_iov( |
136 | arg2, compat_ptr(arg3), arg4, arg5); |
137 | |
138 | default: |
139 | return -EOPNOTSUPP; |
140 | } |
141 | } |
142 |
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Tags:
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v2.6.34-rc5
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