mirror of https://gitee.com/openkylin/linux.git
145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
/* 32-bit compatibility syscall for 64-bit systems
|
|
*
|
|
* Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/syscalls.h>
|
|
#include <linux/keyctl.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/slab.h>
|
|
#include "internal.h"
|
|
|
|
/*
|
|
* Instantiate a key with the specified compatibility multipart payload and
|
|
* link the key into the destination keyring if one is given.
|
|
*
|
|
* The caller must have the appropriate instantiation permit set for this to
|
|
* work (see keyctl_assume_authority). No other permissions are required.
|
|
*
|
|
* If successful, 0 will be returned.
|
|
*/
|
|
static long compat_keyctl_instantiate_key_iov(
|
|
key_serial_t id,
|
|
const struct compat_iovec __user *_payload_iov,
|
|
unsigned ioc,
|
|
key_serial_t ringid)
|
|
{
|
|
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
|
|
long ret;
|
|
|
|
if (!_payload_iov || !ioc)
|
|
goto no_payload;
|
|
|
|
ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc,
|
|
ARRAY_SIZE(iovstack),
|
|
iovstack, &iov);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 0)
|
|
goto no_payload_free;
|
|
|
|
ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid);
|
|
|
|
if (iov != iovstack)
|
|
kfree(iov);
|
|
return ret;
|
|
|
|
no_payload_free:
|
|
if (iov != iovstack)
|
|
kfree(iov);
|
|
no_payload:
|
|
return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid);
|
|
}
|
|
|
|
/*
|
|
* The key control system call, 32-bit compatibility version for 64-bit archs
|
|
*
|
|
* This should only be called if the 64-bit arch uses weird pointers in 32-bit
|
|
* mode or doesn't guarantee that the top 32-bits of the argument registers on
|
|
* taking a 32-bit syscall are zero. If you can, you should call sys_keyctl()
|
|
* directly.
|
|
*/
|
|
asmlinkage long compat_sys_keyctl(u32 option,
|
|
u32 arg2, u32 arg3, u32 arg4, u32 arg5)
|
|
{
|
|
switch (option) {
|
|
case KEYCTL_GET_KEYRING_ID:
|
|
return keyctl_get_keyring_ID(arg2, arg3);
|
|
|
|
case KEYCTL_JOIN_SESSION_KEYRING:
|
|
return keyctl_join_session_keyring(compat_ptr(arg2));
|
|
|
|
case KEYCTL_UPDATE:
|
|
return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
|
|
|
|
case KEYCTL_REVOKE:
|
|
return keyctl_revoke_key(arg2);
|
|
|
|
case KEYCTL_DESCRIBE:
|
|
return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
|
|
|
|
case KEYCTL_CLEAR:
|
|
return keyctl_keyring_clear(arg2);
|
|
|
|
case KEYCTL_LINK:
|
|
return keyctl_keyring_link(arg2, arg3);
|
|
|
|
case KEYCTL_UNLINK:
|
|
return keyctl_keyring_unlink(arg2, arg3);
|
|
|
|
case KEYCTL_SEARCH:
|
|
return keyctl_keyring_search(arg2, compat_ptr(arg3),
|
|
compat_ptr(arg4), arg5);
|
|
|
|
case KEYCTL_READ:
|
|
return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
|
|
|
|
case KEYCTL_CHOWN:
|
|
return keyctl_chown_key(arg2, arg3, arg4);
|
|
|
|
case KEYCTL_SETPERM:
|
|
return keyctl_setperm_key(arg2, arg3);
|
|
|
|
case KEYCTL_INSTANTIATE:
|
|
return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
|
|
arg5);
|
|
|
|
case KEYCTL_NEGATE:
|
|
return keyctl_negate_key(arg2, arg3, arg4);
|
|
|
|
case KEYCTL_SET_REQKEY_KEYRING:
|
|
return keyctl_set_reqkey_keyring(arg2);
|
|
|
|
case KEYCTL_SET_TIMEOUT:
|
|
return keyctl_set_timeout(arg2, arg3);
|
|
|
|
case KEYCTL_ASSUME_AUTHORITY:
|
|
return keyctl_assume_authority(arg2);
|
|
|
|
case KEYCTL_GET_SECURITY:
|
|
return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
|
|
|
|
case KEYCTL_SESSION_TO_PARENT:
|
|
return keyctl_session_to_parent();
|
|
|
|
case KEYCTL_REJECT:
|
|
return keyctl_reject_key(arg2, arg3, arg4, arg5);
|
|
|
|
case KEYCTL_INSTANTIATE_IOV:
|
|
return compat_keyctl_instantiate_key_iov(
|
|
arg2, compat_ptr(arg3), arg4, arg5);
|
|
|
|
case KEYCTL_INVALIDATE:
|
|
return keyctl_invalidate_key(arg2);
|
|
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|