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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /security/selinux/ss/mls_types.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | security/selinux/ss/mls_types.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/security/selinux/ss/mls_types.h b/security/selinux/ss/mls_types.h new file mode 100644 index 000000000..7d48d5e52 --- /dev/null +++ b/security/selinux/ss/mls_types.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Type definitions for the multi-level security (MLS) policy. + * + * Author : Stephen Smalley, <sds@tycho.nsa.gov> + */ +/* + * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> + * + * Support for enhanced MLS infrastructure. + * + * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. + */ + +#ifndef _SS_MLS_TYPES_H_ +#define _SS_MLS_TYPES_H_ + +#include "security.h" +#include "ebitmap.h" + +struct mls_level { + u32 sens; /* sensitivity */ + struct ebitmap cat; /* category set */ +}; + +struct mls_range { + struct mls_level level[2]; /* low == level[0], high == level[1] */ +}; + +static inline int mls_level_eq(const struct mls_level *l1, const struct mls_level *l2) +{ + return ((l1->sens == l2->sens) && + ebitmap_cmp(&l1->cat, &l2->cat)); +} + +static inline int mls_level_dom(const struct mls_level *l1, const struct mls_level *l2) +{ + return ((l1->sens >= l2->sens) && + ebitmap_contains(&l1->cat, &l2->cat, 0)); +} + +#define mls_level_incomp(l1, l2) \ +(!mls_level_dom((l1), (l2)) && !mls_level_dom((l2), (l1))) + +#define mls_level_between(l1, l2, l3) \ +(mls_level_dom((l1), (l2)) && mls_level_dom((l3), (l1))) + +#define mls_range_contains(r1, r2) \ +(mls_level_dom(&(r2).level[0], &(r1).level[0]) && \ + mls_level_dom(&(r1).level[1], &(r2).level[1])) + +#endif /* _SS_MLS_TYPES_H_ */ |