avc.h (aa8e712cee93d520e96a2ca8e3a20f807c937e3f) avc.h (6b6bc6205d98796361962ee282a063f18ba8dc57)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Access vector cache interface for object managers.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 */
7#ifndef _SELINUX_AVC_H_
8#define _SELINUX_AVC_H_

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47struct selinux_audit_data {
48 u32 ssid;
49 u32 tsid;
50 u16 tclass;
51 u32 requested;
52 u32 audited;
53 u32 denied;
54 int result;
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Access vector cache interface for object managers.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 */
7#ifndef _SELINUX_AVC_H_
8#define _SELINUX_AVC_H_

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47struct selinux_audit_data {
48 u32 ssid;
49 u32 tsid;
50 u16 tclass;
51 u32 requested;
52 u32 audited;
53 u32 denied;
54 int result;
55 struct selinux_state *state;
55};
56
57/*
58 * AVC operations
59 */
60
61void __init avc_init(void);
62

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91 } else if (result)
92 audited = denied = requested;
93 else
94 audited = requested & avd->auditallow;
95 *deniedp = denied;
96 return audited;
97}
98
56};
57
58/*
59 * AVC operations
60 */
61
62void __init avc_init(void);
63

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92 } else if (result)
93 audited = denied = requested;
94 else
95 audited = requested & avd->auditallow;
96 *deniedp = denied;
97 return audited;
98}
99
99int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
100int slow_avc_audit(struct selinux_state *state,
101 u32 ssid, u32 tsid, u16 tclass,
100 u32 requested, u32 audited, u32 denied, int result,
101 struct common_audit_data *a,
102 unsigned flags);
103
104/**
105 * avc_audit - Audit the granting or denial of permissions.
106 * @ssid: source security identifier
107 * @tsid: target security identifier

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116 * with the policy. This function is typically called by
117 * avc_has_perm() after a permission check, but can also be
118 * called directly by callers who use avc_has_perm_noaudit()
119 * in order to separate the permission check from the auditing.
120 * For example, this separation is useful when the permission check must
121 * be performed under a lock, to allow the lock to be released
122 * before calling the auditing code.
123 */
102 u32 requested, u32 audited, u32 denied, int result,
103 struct common_audit_data *a,
104 unsigned flags);
105
106/**
107 * avc_audit - Audit the granting or denial of permissions.
108 * @ssid: source security identifier
109 * @tsid: target security identifier

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118 * with the policy. This function is typically called by
119 * avc_has_perm() after a permission check, but can also be
120 * called directly by callers who use avc_has_perm_noaudit()
121 * in order to separate the permission check from the auditing.
122 * For example, this separation is useful when the permission check must
123 * be performed under a lock, to allow the lock to be released
124 * before calling the auditing code.
125 */
124static inline int avc_audit(u32 ssid, u32 tsid,
126static inline int avc_audit(struct selinux_state *state,
127 u32 ssid, u32 tsid,
125 u16 tclass, u32 requested,
126 struct av_decision *avd,
127 int result,
128 struct common_audit_data *a,
129 int flags)
130{
131 u32 audited, denied;
132 audited = avc_audit_required(requested, avd, result, 0, &denied);
133 if (likely(!audited))
134 return 0;
128 u16 tclass, u32 requested,
129 struct av_decision *avd,
130 int result,
131 struct common_audit_data *a,
132 int flags)
133{
134 u32 audited, denied;
135 audited = avc_audit_required(requested, avd, result, 0, &denied);
136 if (likely(!audited))
137 return 0;
135 return slow_avc_audit(ssid, tsid, tclass,
138 return slow_avc_audit(state, ssid, tsid, tclass,
136 requested, audited, denied, result,
137 a, flags);
138}
139
140#define AVC_STRICT 1 /* Ignore permissive mode. */
141#define AVC_EXTENDED_PERMS 2 /* update extended permissions */
139 requested, audited, denied, result,
140 a, flags);
141}
142
143#define AVC_STRICT 1 /* Ignore permissive mode. */
144#define AVC_EXTENDED_PERMS 2 /* update extended permissions */
142int avc_has_perm_noaudit(u32 ssid, u32 tsid,
145int avc_has_perm_noaudit(struct selinux_state *state,
146 u32 ssid, u32 tsid,
143 u16 tclass, u32 requested,
144 unsigned flags,
145 struct av_decision *avd);
146
147 u16 tclass, u32 requested,
148 unsigned flags,
149 struct av_decision *avd);
150
147int avc_has_perm(u32 ssid, u32 tsid,
151int avc_has_perm(struct selinux_state *state,
152 u32 ssid, u32 tsid,
148 u16 tclass, u32 requested,
149 struct common_audit_data *auditdata);
153 u16 tclass, u32 requested,
154 struct common_audit_data *auditdata);
150int avc_has_perm_flags(u32 ssid, u32 tsid,
155int avc_has_perm_flags(struct selinux_state *state,
156 u32 ssid, u32 tsid,
151 u16 tclass, u32 requested,
152 struct common_audit_data *auditdata,
153 int flags);
154
157 u16 tclass, u32 requested,
158 struct common_audit_data *auditdata,
159 int flags);
160
155int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested,
156 u8 driver, u8 perm, struct common_audit_data *ad);
161int avc_has_extended_perms(struct selinux_state *state,
162 u32 ssid, u32 tsid, u16 tclass, u32 requested,
163 u8 driver, u8 perm, struct common_audit_data *ad);
157
158
164
165
159u32 avc_policy_seqno(void);
166u32 avc_policy_seqno(struct selinux_state *state);
160
161#define AVC_CALLBACK_GRANT 1
162#define AVC_CALLBACK_TRY_REVOKE 2
163#define AVC_CALLBACK_REVOKE 4
164#define AVC_CALLBACK_RESET 8
165#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
166#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
167#define AVC_CALLBACK_AUDITDENY_ENABLE 64
168#define AVC_CALLBACK_AUDITDENY_DISABLE 128
169#define AVC_CALLBACK_ADD_XPERMS 256
170
171int avc_add_callback(int (*callback)(u32 event), u32 events);
172
173/* Exported to selinuxfs */
167
168#define AVC_CALLBACK_GRANT 1
169#define AVC_CALLBACK_TRY_REVOKE 2
170#define AVC_CALLBACK_REVOKE 4
171#define AVC_CALLBACK_RESET 8
172#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
173#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
174#define AVC_CALLBACK_AUDITDENY_ENABLE 64
175#define AVC_CALLBACK_AUDITDENY_DISABLE 128
176#define AVC_CALLBACK_ADD_XPERMS 256
177
178int avc_add_callback(int (*callback)(u32 event), u32 events);
179
180/* Exported to selinuxfs */
174int avc_get_hash_stats(char *page);
175extern unsigned int avc_cache_threshold;
181struct selinux_avc;
182int avc_get_hash_stats(struct selinux_avc *avc, char *page);
183unsigned int avc_get_cache_threshold(struct selinux_avc *avc);
184void avc_set_cache_threshold(struct selinux_avc *avc,
185 unsigned int cache_threshold);
176
177/* Attempt to free avc node cache */
178void avc_disable(void);
179
180#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
181DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
182#endif
183
184#endif /* _SELINUX_AVC_H_ */
185
186
187/* Attempt to free avc node cache */
188void avc_disable(void);
189
190#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
191DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
192#endif
193
194#endif /* _SELINUX_AVC_H_ */
195