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6#ifndef _SELINUX_AVC_H_
7#define _SELINUX_AVC_H_
8
9#include <linux/stddef.h>
10#include <linux/errno.h>
11#include <linux/kernel.h>
12#include <linux/kdev_t.h>
13#include <linux/spinlock.h>
14#include <linux/init.h>
15#include <linux/audit.h>
16#include <linux/lsm_audit.h>
17#include <linux/in6.h>
18#include "flask.h"
19#include "av_permissions.h"
20#include "security.h"
21
22#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
23extern int selinux_enforcing;
24#else
25#define selinux_enforcing 1
26#endif
27
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30
31struct avc_entry;
32
33struct task_struct;
34struct inode;
35struct sock;
36struct sk_buff;
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40
41struct avc_cache_stats {
42 unsigned int lookups;
43 unsigned int misses;
44 unsigned int allocations;
45 unsigned int reclaims;
46 unsigned int frees;
47};
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52struct selinux_audit_data {
53 u32 ssid;
54 u32 tsid;
55 u16 tclass;
56 u32 requested;
57 u32 audited;
58 u32 denied;
59 int result;
60};
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65
66void __init avc_init(void);
67
68static inline u32 avc_audit_required(u32 requested,
69 struct av_decision *avd,
70 int result,
71 u32 auditdeny,
72 u32 *deniedp)
73{
74 u32 denied, audited;
75 denied = requested & ~avd->allowed;
76 if (unlikely(denied)) {
77 audited = denied & avd->auditdeny;
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94 if (auditdeny && !(auditdeny & avd->auditdeny))
95 audited = 0;
96 } else if (result)
97 audited = denied = requested;
98 else
99 audited = requested & avd->auditallow;
100 *deniedp = denied;
101 return audited;
102}
103
104int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
105 u32 requested, u32 audited, u32 denied,
106 struct common_audit_data *a,
107 unsigned flags);
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129static inline int avc_audit(u32 ssid, u32 tsid,
130 u16 tclass, u32 requested,
131 struct av_decision *avd,
132 int result,
133 struct common_audit_data *a, unsigned flags)
134{
135 u32 audited, denied;
136 audited = avc_audit_required(requested, avd, result, 0, &denied);
137 if (likely(!audited))
138 return 0;
139 return slow_avc_audit(ssid, tsid, tclass,
140 requested, audited, denied,
141 a, flags);
142}
143
144#define AVC_STRICT 1
145int avc_has_perm_noaudit(u32 ssid, u32 tsid,
146 u16 tclass, u32 requested,
147 unsigned flags,
148 struct av_decision *avd);
149
150int avc_has_perm_flags(u32 ssid, u32 tsid,
151 u16 tclass, u32 requested,
152 struct common_audit_data *auditdata,
153 unsigned);
154
155static inline int avc_has_perm(u32 ssid, u32 tsid,
156 u16 tclass, u32 requested,
157 struct common_audit_data *auditdata)
158{
159 return avc_has_perm_flags(ssid, tsid, tclass, requested, auditdata, 0);
160}
161
162u32 avc_policy_seqno(void);
163
164#define AVC_CALLBACK_GRANT 1
165#define AVC_CALLBACK_TRY_REVOKE 2
166#define AVC_CALLBACK_REVOKE 4
167#define AVC_CALLBACK_RESET 8
168#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
169#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
170#define AVC_CALLBACK_AUDITDENY_ENABLE 64
171#define AVC_CALLBACK_AUDITDENY_DISABLE 128
172
173int avc_add_callback(int (*callback)(u32 event), u32 events);
174
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176int avc_get_hash_stats(char *page);
177extern unsigned int avc_cache_threshold;
178
179
180void avc_disable(void);
181
182#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
183DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
184#endif
185
186#endif
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