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99f9ef18 DH |
1 | /* Lock down the kernel |
2 | * | |
3 | * Copyright (C) 2016 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/security.h> | |
13 | #include <linux/export.h> | |
14 | ||
15 | static __read_mostly bool kernel_locked_down; | |
16 | ||
17 | /* | |
18 | * Put the kernel into lock-down mode. | |
19 | */ | |
20 | void lock_kernel_down(void) | |
21 | { | |
22 | kernel_locked_down = true; | |
23 | } | |
24 | ||
25 | /* | |
26 | * Take the kernel out of lockdown mode. | |
27 | */ | |
28 | void lift_kernel_lockdown(void) | |
29 | { | |
30 | kernel_locked_down = false; | |
31 | } | |
32 | ||
33 | /** | |
34 | * kernel_is_locked_down - Find out if the kernel is locked down | |
35 | */ | |
36 | bool kernel_is_locked_down(void) | |
37 | { | |
38 | return kernel_locked_down; | |
39 | } | |
40 | EXPORT_SYMBOL(kernel_is_locked_down); |