tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Access vector cache interface for object managers.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 */
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/in6.h>
16#include <linux/path.h>
17#include <asm/system.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
28/*
29 * An entry in the AVC.
30 */
31struct avc_entry;
32
33struct task_struct;
34struct inode;
35struct sock;
36struct sk_buff;
37
38/* Auxiliary data to use in generating the audit record. */
39struct avc_audit_data {
40 char type;
41#define AVC_AUDIT_DATA_FS 1
42#define AVC_AUDIT_DATA_NET 2
43#define AVC_AUDIT_DATA_CAP 3
44#define AVC_AUDIT_DATA_IPC 4
45 struct task_struct *tsk;
46 union {
47 struct {
48 struct path path;
49 struct inode *inode;
50 } fs;
51 struct {
52 int netif;
53 struct sock *sk;
54 u16 family;
55 __be16 dport;
56 __be16 sport;
57 union {
58 struct {
59 __be32 daddr;
60 __be32 saddr;
61 } v4;
62 struct {
63 struct in6_addr daddr;
64 struct in6_addr saddr;
65 } v6;
66 } fam;
67 } net;
68 int cap;
69 int ipc_id;
70 } u;
71};
72
73#define v4info fam.v4
74#define v6info fam.v6
75
76/* Initialize an AVC audit data structure. */
77#define AVC_AUDIT_DATA_INIT(_d,_t) \
78 { memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; }
79
80/*
81 * AVC statistics
82 */
83struct avc_cache_stats
84{
85 unsigned int lookups;
86 unsigned int hits;
87 unsigned int misses;
88 unsigned int allocations;
89 unsigned int reclaims;
90 unsigned int frees;
91};
92
93/*
94 * AVC operations
95 */
96
97void __init avc_init(void);
98
99void avc_audit(u32 ssid, u32 tsid,
100 u16 tclass, u32 requested,
101 struct av_decision *avd, int result, struct avc_audit_data *auditdata);
102
103#define AVC_STRICT 1 /* Ignore permissive mode. */
104int avc_has_perm_noaudit(u32 ssid, u32 tsid,
105 u16 tclass, u32 requested,
106 unsigned flags,
107 struct av_decision *avd);
108
109int avc_has_perm(u32 ssid, u32 tsid,
110 u16 tclass, u32 requested,
111 struct avc_audit_data *auditdata);
112
113u32 avc_policy_seqno(void);
114
115#define AVC_CALLBACK_GRANT 1
116#define AVC_CALLBACK_TRY_REVOKE 2
117#define AVC_CALLBACK_REVOKE 4
118#define AVC_CALLBACK_RESET 8
119#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
120#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
121#define AVC_CALLBACK_AUDITDENY_ENABLE 64
122#define AVC_CALLBACK_AUDITDENY_DISABLE 128
123
124int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
125 u16 tclass, u32 perms,
126 u32 *out_retained),
127 u32 events, u32 ssid, u32 tsid,
128 u16 tclass, u32 perms);
129
130/* Exported to selinuxfs */
131int avc_get_hash_stats(char *page);
132extern unsigned int avc_cache_threshold;
133
134#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
135DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
136#endif
137
138#endif /* _SELINUX_AVC_H_ */
139