blob: 9ee4b30a87e67c6bc1987eeed0124abdc72bffed (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Landlock LSM - Access types and helpers
*
* Copyright © 2016-2020 Mickaël Salaün <mic@digikod.net>
* Copyright © 2018-2020 ANSSI
* Copyright © 2024-2025 Microsoft Corporation
*/
#ifndef _SECURITY_LANDLOCK_ACCESS_H
#define _SECURITY_LANDLOCK_ACCESS_H
#include <linux/bitops.h>
#include <linux/build_bug.h>
#include <linux/kernel.h>
#include <uapi/linux/landlock.h>
#include "limits.h"
/*
* All access rights that are denied by default whether they are handled or not
* by a ruleset/layer. This must be ORed with all ruleset->access_masks[]
* entries when we need to get the absolute handled access masks.
*/
/* clang-format off */
#define _LANDLOCK_ACCESS_FS_INITIALLY_DENIED ( \
LANDLOCK_ACCESS_FS_REFER)
/* clang-format on */
typedef u16 access_mask_t;
/* Makes sure all filesystem access rights can be stored. */
static_assert(BITS_PER_TYPE(access_mask_t) >= LANDLOCK_NUM_ACCESS_FS);
/* Makes sure all network access rights can be stored. */
static_assert(BITS_PER_TYPE(access_mask_t) >= LANDLOCK_NUM_ACCESS_NET);
/* Makes sure all scoped rights can be stored. */
static_assert(BITS_PER_TYPE(access_mask_t) >= LANDLOCK_NUM_SCOPE);
/* Makes sure for_each_set_bit() and for_each_clear_bit() calls are OK. */
static_assert(sizeof(unsigned long) >= sizeof(access_mask_t));
/* Ruleset access masks. */
struct access_masks {
access_mask_t fs : LANDLOCK_NUM_ACCESS_FS;
access_mask_t net : LANDLOCK_NUM_ACCESS_NET;
access_mask_t scope : LANDLOCK_NUM_SCOPE;
};
union access_masks_all {
struct access_masks masks;
u32 all;
};
/* Makes sure all fields are covered. */
static_assert(sizeof(typeof_member(union access_masks_all, masks)) ==
sizeof(typeof_member(union access_masks_all, all)));
typedef u16 layer_mask_t;
/* Makes sure all layers can be checked. */
static_assert(BITS_PER_TYPE(layer_mask_t) >= LANDLOCK_MAX_NUM_LAYERS);
#endif /* _SECURITY_LANDLOCK_ACCESS_H */
|
