Line data Source code
1 : /*
2 : * SELinux services exported to the rest of the kernel.
3 : *
4 : * Author: James Morris <jmorris@redhat.com>
5 : *
6 : * Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 : * Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
8 : * Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>
9 : *
10 : * This program is free software; you can redistribute it and/or modify
11 : * it under the terms of the GNU General Public License version 2,
12 : * as published by the Free Software Foundation.
13 : */
14 : #ifndef _LINUX_SELINUX_H
15 : #define _LINUX_SELINUX_H
16 :
17 : struct selinux_audit_rule;
18 : struct audit_context;
19 : struct kern_ipc_perm;
20 :
21 : #ifdef CONFIG_SECURITY_SELINUX
22 :
23 : /**
24 : * selinux_string_to_sid - map a security context string to a security ID
25 : * @str: the security context string to be mapped
26 : * @sid: ID value returned via this.
27 : *
28 : * Returns 0 if successful, with the SID stored in sid. A value
29 : * of zero for sid indicates no SID could be determined (but no error
30 : * occurred).
31 : */
32 : int selinux_string_to_sid(char *str, u32 *sid);
33 :
34 : /**
35 : * selinux_secmark_relabel_packet_permission - secmark permission check
36 : * @sid: SECMARK ID value to be applied to network packet
37 : *
38 : * Returns 0 if the current task is allowed to set the SECMARK label of
39 : * packets with the supplied security ID. Note that it is implicit that
40 : * the packet is always being relabeled from the default unlabeled value,
41 : * and that the access control decision is made in the AVC.
42 : */
43 : int selinux_secmark_relabel_packet_permission(u32 sid);
44 :
45 : /**
46 : * selinux_secmark_refcount_inc - increments the secmark use counter
47 : *
48 : * SELinux keeps track of the current SECMARK targets in use so it knows
49 : * when to apply SECMARK label access checks to network packets. This
50 : * function incements this reference count to indicate that a new SECMARK
51 : * target has been configured.
52 : */
53 : void selinux_secmark_refcount_inc(void);
54 :
55 : /**
56 : * selinux_secmark_refcount_dec - decrements the secmark use counter
57 : *
58 : * SELinux keeps track of the current SECMARK targets in use so it knows
59 : * when to apply SECMARK label access checks to network packets. This
60 : * function decements this reference count to indicate that one of the
61 : * existing SECMARK targets has been removed/flushed.
62 : */
63 : void selinux_secmark_refcount_dec(void);
64 :
65 : /**
66 : * selinux_is_enabled - is SELinux enabled?
67 : */
68 : bool selinux_is_enabled(void);
69 : #else
70 :
71 : static inline int selinux_string_to_sid(const char *str, u32 *sid)
72 : {
73 : *sid = 0;
74 : return 0;
75 : }
76 :
77 : static inline int selinux_secmark_relabel_packet_permission(u32 sid)
78 : {
79 : return 0;
80 : }
81 :
82 : static inline void selinux_secmark_refcount_inc(void)
83 : {
84 : return;
85 : }
86 :
87 : static inline void selinux_secmark_refcount_dec(void)
88 : {
89 : return;
90 : }
91 :
92 : static inline bool selinux_is_enabled(void)
93 : {
94 : return false;
95 : }
96 1 : #endif /* CONFIG_SECURITY_SELINUX */
97 1 :
98 : #endif /* _LINUX_SELINUX_H */
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