[linux-block.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/in6.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 vfsmount;
struct dentry;
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 vfsmount *mnt;
			struct dentry *dentry;
			struct inode *inode;
		} fs;
		struct {
			char *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;

#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>
	15	#include <linux/in6.h>
	16	#include <asm/system.h>
	17	#include "flask.h"
	18	#include "av_permissions.h"
	19	#include "security.h"
	20
	21	#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
	22	extern int selinux_enforcing;
	23	#else
	24	#define selinux_enforcing 1
	25	#endif
	26
	27	/*
	28	* An entry in the AVC.
	29	*/
	30	struct avc_entry;
	31
	32	struct task_struct;
	33	struct vfsmount;
	34	struct dentry;
	35	struct inode;
	36	struct sock;
	37	struct sk_buff;
	38
	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 vfsmount *mnt;
	50	struct dentry *dentry;
	51	struct inode *inode;
	52	} fs;
	53	struct {
	54	char *netif;
	55	struct sock *sk;
	56	u16 family;
87fcd70d AV	57	__be16 dport;
87fcd70d AV	58	__be16 sport;
1da177e4 LT	59	union {
1da177e4 LT	60	struct {
87fcd70d AV	61	__be32 daddr;
87fcd70d AV	62	__be32 saddr;
1da177e4 LT	63	} v4;
	64	struct {
	65	struct in6_addr daddr;
	66	struct in6_addr saddr;
	67	} v6;
	68	} fam;
	69	} net;
	70	int cap;
	71	int ipc_id;
	72	} u;
	73	};
	74
	75	#define v4info fam.v4
	76	#define v6info fam.v6
	77
	78	/* Initialize an AVC audit data structure. */
	79	#define AVC_AUDIT_DATA_INIT(_d,_t) \
	80	{ memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; }
	81
	82	/*
	83	* AVC statistics
	84	*/
	85	struct avc_cache_stats
	86	{
	87	unsigned int lookups;
	88	unsigned int hits;
	89	unsigned int misses;
	90	unsigned int allocations;
	91	unsigned int reclaims;
	92	unsigned int frees;
	93	};
	94
	95	/*
	96	* AVC operations
	97	*/
	98
	99	void __init avc_init(void);
	100
	101	void avc_audit(u32 ssid, u32 tsid,
	102	u16 tclass, u32 requested,
	103	struct av_decision avd, int result, struct avc_audit_data auditdata);
	104
2c3c05db	105	#define AVC_STRICT 1 /* Ignore permissive mode. */
1da177e4	106	int avc_has_perm_noaudit(u32 ssid, u32 tsid,
2c3c05db SS	107	u16 tclass, u32 requested,
	108	unsigned flags,
	109	struct av_decision *avd);
1da177e4 LT	110
	111	int avc_has_perm(u32 ssid, u32 tsid,
	112	u16 tclass, u32 requested,
	113	struct avc_audit_data *auditdata);
	114
788e7dd4 YN	115	u32 avc_policy_seqno(void);
788e7dd4 YN	116
1da177e4 LT	117	#define AVC_CALLBACK_GRANT 1
	118	#define AVC_CALLBACK_TRY_REVOKE 2
	119	#define AVC_CALLBACK_REVOKE 4
	120	#define AVC_CALLBACK_RESET 8
	121	#define AVC_CALLBACK_AUDITALLOW_ENABLE 16
	122	#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
	123	#define AVC_CALLBACK_AUDITDENY_ENABLE 64
	124	#define AVC_CALLBACK_AUDITDENY_DISABLE 128
	125
	126	int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
	127	u16 tclass, u32 perms,
	128	u32 *out_retained),
	129	u32 events, u32 ssid, u32 tsid,
	130	u16 tclass, u32 perms);
	131
	132	/* Exported to selinuxfs */
	133	int avc_get_hash_stats(char *page);
	134	extern unsigned int avc_cache_threshold;
	135
	136	#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
	137	DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
	138	#endif
	139
	140	#endif /* _SELINUX_AVC_H_ */
	141