[deliverable/linux.git] / security / selinux / include / selinux_netlabel.h

/*
 * SELinux interface to the NetLabel subsystem
 *
 * Author : Paul Moore <paul.moore@hp.com>
 *
 */

/*
 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
 *
 * This program is free software;  you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program;  if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#ifndef _SELINUX_NETLABEL_H_
#define _SELINUX_NETLABEL_H_

#ifdef CONFIG_NETLABEL
void selinux_netlbl_cache_invalidate(void);
int selinux_netlbl_socket_post_create(struct socket *sock,
				      int sock_family,
				      u32 sid);
void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock);
u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid);
int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
				struct sk_buff *skb,
				struct avc_audit_data *ad);
u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock);
u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb);
void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
				     int family);
void selinux_netlbl_sk_clone_security(struct sk_security_struct *ssec,
				      struct sk_security_struct *newssec);

int __selinux_netlbl_inode_permission(struct inode *inode, int mask);
/**
 * selinux_netlbl_inode_permission - Verify the socket is NetLabel labeled
 * @inode: the file descriptor's inode
 * @mask: the permission mask
 *
 * Description:
 * Looks at a file's inode and if it is marked as a socket protected by
 * NetLabel then verify that the socket has been labeled, if not try to label
 * the socket now with the inode's SID.  Returns zero on success, negative
 * values on failure.
 *
 */
static inline int selinux_netlbl_inode_permission(struct inode *inode,
						  int mask)
{
	int rc = 0;
	struct inode_security_struct *isec;
	struct sk_security_struct *sksec;

	if (!S_ISSOCK(inode->i_mode))
		return 0;

	isec = inode->i_security;
	sksec = SOCKET_I(inode)->sk->sk_security;
	down(&isec->sem);
	if (unlikely(sksec->nlbl_state == NLBL_REQUIRE &&
		     (mask & (MAY_WRITE | MAY_APPEND))))
		rc = __selinux_netlbl_inode_permission(inode, mask);
	up(&isec->sem);

	return rc;
}
#else
static inline void selinux_netlbl_cache_invalidate(void)
{
	return;
}

static inline int selinux_netlbl_socket_post_create(struct socket *sock,
						    int sock_family,
						    u32 sid)
{
	return 0;
}

static inline void selinux_netlbl_sock_graft(struct sock *sk,
					     struct socket *sock)
{
	return;
}

static inline u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb,
						   u32 sock_sid)
{
	return SECSID_NULL;
}

static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
					      struct sk_buff *skb,
					      struct avc_audit_data *ad)
{
	return 0;
}

static inline u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
{
	return SECSID_NULL;
}

static inline u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
{
	return SECSID_NULL;
}

static inline void selinux_netlbl_sk_security_init(
	                                       struct sk_security_struct *ssec,
					       int family)
{
	return;
}

static inline void selinux_netlbl_sk_clone_security(
	                                   struct sk_security_struct *ssec,
					   struct sk_security_struct *newssec)
{
	return;
}

static inline int selinux_netlbl_inode_permission(struct inode *inode,
						  int mask)
{
	return 0;
}
#endif /* CONFIG_NETLABEL */

#endif
Commit	Line	Data
7420ed23 VY	1	/*
	2	* SELinux interface to the NetLabel subsystem
	3	*
	4	* Author : Paul Moore <paul.moore@hp.com>
	5	*
	6	*/
	7
	8	/*
	9	* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	19	* the GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	24	*
	25	*/
	26
	27	#ifndef _SELINUX_NETLABEL_H_
	28	#define _SELINUX_NETLABEL_H_
	29
	30	#ifdef CONFIG_NETLABEL
	31	void selinux_netlbl_cache_invalidate(void);
	32	int selinux_netlbl_socket_post_create(struct socket *sock,
	33	int sock_family,
	34	u32 sid);
	35	void selinux_netlbl_sock_graft(struct sock sk, struct socket sock);
	36	u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid);
	37	int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
	38	struct sk_buff *skb,
	39	struct avc_audit_data *ad);
	40	u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock);
	41	u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb);
99f59ed0 PM	42	void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
	43	int family);
	44	void selinux_netlbl_sk_clone_security(struct sk_security_struct *ssec,
	45	struct sk_security_struct *newssec);
7420ed23 VY	46
	47	int __selinux_netlbl_inode_permission(struct inode *inode, int mask);
	48	/**
	49	* selinux_netlbl_inode_permission - Verify the socket is NetLabel labeled
	50	* @inode: the file descriptor's inode
	51	* @mask: the permission mask
	52	*
	53	* Description:
	54	* Looks at a file's inode and if it is marked as a socket protected by
	55	* NetLabel then verify that the socket has been labeled, if not try to label
	56	* the socket now with the inode's SID. Returns zero on success, negative
	57	* values on failure.
	58	*
	59	*/
	60	static inline int selinux_netlbl_inode_permission(struct inode *inode,
	61	int mask)
	62	{
	63	int rc = 0;
	64	struct inode_security_struct *isec;
	65	struct sk_security_struct *sksec;
	66
	67	if (!S_ISSOCK(inode->i_mode))
	68	return 0;
	69
	70	isec = inode->i_security;
	71	sksec = SOCKET_I(inode)->sk->sk_security;
	72	down(&isec->sem);
	73	if (unlikely(sksec->nlbl_state == NLBL_REQUIRE &&
	74	(mask & (MAY_WRITE \| MAY_APPEND))))
	75	rc = __selinux_netlbl_inode_permission(inode, mask);
	76	up(&isec->sem);
	77
	78	return rc;
	79	}
	80	#else
	81	static inline void selinux_netlbl_cache_invalidate(void)
	82	{
	83	return;
	84	}
	85
	86	static inline int selinux_netlbl_socket_post_create(struct socket *sock,
	87	int sock_family,
	88	u32 sid)
	89	{
	90	return 0;
	91	}
	92
	93	static inline void selinux_netlbl_sock_graft(struct sock *sk,
	94	struct socket *sock)
	95	{
	96	return;
	97	}
	98
	99	static inline u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb,
	100	u32 sock_sid)
	101	{
	102	return SECSID_NULL;
	103	}
	104
	105	static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
	106	struct sk_buff *skb,
	107	struct avc_audit_data *ad)
	108	{
	109	return 0;
110	}
111
112	static inline u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
113	{
114	return SECSID_NULL;
115	}
116
117	static inline u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
118	{
119	return SECSID_NULL;
120	}
121
99f59ed0 PM	122	static inline void selinux_netlbl_sk_security_init(
	123	struct sk_security_struct *ssec,
	124	int family)
	125	{
	126	return;
	127	}
	128
	129	static inline void selinux_netlbl_sk_clone_security(
	130	struct sk_security_struct *ssec,
	131	struct sk_security_struct *newssec)
	132	{
	133	return;
	134	}
	135
7420ed23 VY	136	static inline int selinux_netlbl_inode_permission(struct inode *inode,
	137	int mask)
	138	{
	139	return 0;
	140	}
	141	#endif /* CONFIG_NETLABEL */
	142
	143	#endif