[mirror_ubuntu-bionic-kernel.git] / security / selinux / include / avc.h

/*
 * Access vector cache interface for object managers.
 *
 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
 */
#ifndef _SELINUX_AVC_H_
#define _SELINUX_AVC_H_

#include <linux/stddef.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kdev_t.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/audit.h>
#include <linux/in6.h>
#include <linux/path.h>
#include <asm/system.h>
#include "flask.h"
#include "av_permissions.h"
#include "security.h"

#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
extern int selinux_enforcing;
#else
#define selinux_enforcing 1
#endif

/*
 * An entry in the AVC.
 */
struct avc_entry;

struct task_struct;
struct inode;
struct sock;
struct sk_buff;

/* Auxiliary data to use in generating the audit record. */
struct avc_audit_data {
	char    type;
#define AVC_AUDIT_DATA_FS   1
#define AVC_AUDIT_DATA_NET  2
#define AVC_AUDIT_DATA_CAP  3
#define AVC_AUDIT_DATA_IPC  4
	struct task_struct *tsk;
	union 	{
		struct {
			struct path path;
			struct inode *inode;
		} fs;
		struct {
			int netif;
			struct sock *sk;
			u16 family;
			__be16 dport;
			__be16 sport;
			union {
				struct {
					__be32 daddr;
					__be32 saddr;
				} v4;
				struct {
					struct in6_addr daddr;
					struct in6_addr saddr;
				} v6;
			} fam;
		} net;
		int cap;
		int ipc_id;
	} u;
};

#define v4info fam.v4
#define v6info fam.v6

/* Initialize an AVC audit data structure. */
#define AVC_AUDIT_DATA_INIT(_d,_t) \
	{ memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; }

/*
 * AVC statistics
 */
struct avc_cache_stats {
	unsigned int lookups;
	unsigned int hits;
	unsigned int misses;
	unsigned int allocations;
	unsigned int reclaims;
	unsigned int frees;
};

/*
 * AVC operations
 */

void __init avc_init(void);

void avc_audit(u32 ssid, u32 tsid,
	       u16 tclass, u32 requested,
	       struct av_decision *avd, int result, struct avc_audit_data *auditdata);

#define AVC_STRICT 1 /* Ignore permissive mode. */
int avc_has_perm_noaudit(u32 ssid, u32 tsid,
			 u16 tclass, u32 requested,
			 unsigned flags,
			 struct av_decision *avd);

int avc_has_perm(u32 ssid, u32 tsid,
		 u16 tclass, u32 requested,
		 struct avc_audit_data *auditdata);

u32 avc_policy_seqno(void);

#define AVC_CALLBACK_GRANT		1
#define AVC_CALLBACK_TRY_REVOKE		2
#define AVC_CALLBACK_REVOKE		4
#define AVC_CALLBACK_RESET		8
#define AVC_CALLBACK_AUDITALLOW_ENABLE	16
#define AVC_CALLBACK_AUDITALLOW_DISABLE	32
#define AVC_CALLBACK_AUDITDENY_ENABLE	64
#define AVC_CALLBACK_AUDITDENY_DISABLE	128

int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
				     u16 tclass, u32 perms,
				     u32 *out_retained),
		     u32 events, u32 ssid, u32 tsid,
		     u16 tclass, u32 perms);

/* Exported to selinuxfs */
int avc_get_hash_stats(char *page);
extern unsigned int avc_cache_threshold;

/* Attempt to free avc node cache */
void avc_disable(void);

#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
#endif

#endif /* _SELINUX_AVC_H_ */
Commit	Line	Data
1da177e4 LT	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>
d9250dea	15	#include <linux/audit.h>
1da177e4	16	#include <linux/in6.h>
44707fdf	17	#include <linux/path.h>
1da177e4 LT	18	#include <asm/system.h>
	19	#include "flask.h"
	20	#include "av_permissions.h"
	21	#include "security.h"
	22
	23	#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
	24	extern int selinux_enforcing;
	25	#else
	26	#define selinux_enforcing 1
	27	#endif
	28
	29	/*
	30	* An entry in the AVC.
	31	*/
	32	struct avc_entry;
	33
	34	struct task_struct;
1da177e4 LT	35	struct inode;
	36	struct sock;
	37	struct sk_buff;
	38
be940d62 JM	39	/* Auxiliary data to use in generating the audit record. */
	40	struct avc_audit_data {
	41	char type;
	42	#define AVC_AUDIT_DATA_FS 1
	43	#define AVC_AUDIT_DATA_NET 2
	44	#define AVC_AUDIT_DATA_CAP 3
	45	#define AVC_AUDIT_DATA_IPC 4
	46	struct task_struct *tsk;
	47	union {
	48	struct {
	49	struct path path;
	50	struct inode *inode;
	51	} fs;
	52	struct {
	53	int netif;
	54	struct sock *sk;
	55	u16 family;
	56	__be16 dport;
	57	__be16 sport;
	58	union {
	59	struct {
	60	__be32 daddr;
	61	__be32 saddr;
	62	} v4;
	63	struct {
	64	struct in6_addr daddr;
	65	struct in6_addr saddr;
	66	} v6;
	67	} fam;
	68	} net;
	69	int cap;
	70	int ipc_id;
	71	} u;
	72	};
	73
	74	#define v4info fam.v4
	75	#define v6info fam.v6
	76
	77	/* Initialize an AVC audit data structure. */
	78	#define AVC_AUDIT_DATA_INIT(_d,_t) \
	79	{ memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; }
	80
1da177e4 LT	81	/*
	82	* AVC statistics
	83	*/
f5269710	84	struct avc_cache_stats {
1da177e4 LT	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
	97	void __init avc_init(void);
	98
	99	void avc_audit(u32 ssid, u32 tsid,
f5269710	100	u16 tclass, u32 requested,
be940d62	101	struct av_decision avd, int result, struct avc_audit_data auditdata);
1da177e4	102
2c3c05db	103	#define AVC_STRICT 1 /* Ignore permissive mode. */
1da177e4	104	int avc_has_perm_noaudit(u32 ssid, u32 tsid,
2c3c05db SS	105	u16 tclass, u32 requested,
	106	unsigned flags,
	107	struct av_decision *avd);
1da177e4 LT	108
1da177e4 LT	109	int avc_has_perm(u32 ssid, u32 tsid,
f5269710	110	u16 tclass, u32 requested,
be940d62	111	struct avc_audit_data *auditdata);
1da177e4	112
788e7dd4 YN	113	u32 avc_policy_seqno(void);
788e7dd4 YN	114
1da177e4 LT	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
	124	int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
f5269710	125	u16 tclass, u32 perms,
1da177e4 LT	126	u32 *out_retained),
	127	u32 events, u32 ssid, u32 tsid,
	128	u16 tclass, u32 perms);
	129
	130	/* Exported to selinuxfs */
	131	int avc_get_hash_stats(char *page);
	132	extern unsigned int avc_cache_threshold;
	133
89c86576 TL	134	/* Attempt to free avc node cache */
	135	void avc_disable(void);
	136
1da177e4 LT	137	#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
	138	DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
	139	#endif
	140
	141	#endif /* _SELINUX_AVC_H_ */
	142