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Commit c749b29f authored by James Morris's avatar James Morris Committed by David S. Miller
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[SECMARK]: Add SELinux exports 



Add and export new functions to the in-kernel SELinux API in support of the
new secmark-based packet controls.

Signed-off-by: default avatarJames Morris <jmorris@namei.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 29a395ea

include/linux/selinux.h

+32 −0
Original line number Diff line number Diff line
@@ -118,6 +118,27 @@ void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid); 
 */

void selinux_get_task_sid(struct task_struct *tsk, u32 *sid);



/**

 *     selinux_string_to_sid - map a security context string to a security ID

 *     @str: the security context string to be mapped

 *     @sid: ID value returned via this.

 *

 *     Returns 0 if successful, with the SID stored in sid.  A value

 *     of zero for sid indicates no SID could be determined (but no error

 *     occurred).

 */

int selinux_string_to_sid(char *str, u32 *sid);



/**

 *     selinux_relabel_packet_permission - check permission to relabel a packet

 *     @sid: ID value to be applied to network packet (via SECMARK, most likely)

 *

 *     Returns 0 if the current task is allowed to label packets with the

 *     supplied security ID.  Note that it is implicit that the packet is always

 *     being relabeled from the default unlabled value, and that the access

 *     control decision is made in the AVC.

 */

int selinux_relabel_packet_permission(u32 sid);



#else
@@ -172,6 +193,17 @@ static inline void selinux_get_task_sid(struct task_struct *tsk, u32 *sid) 
	*sid = 0;

}



static inline int selinux_string_to_sid(const char *str, u32 *sid)

{

       *sid = 0;

       return 0;

}



static inline int selinux_relabel_packet_permission(u32 sid)

{

	return 0;

}



#endif	/* CONFIG_SECURITY_SELINUX */



#endif /* _LINUX_SELINUX_H */

security/selinux/exports.c

+22 −0
Original line number Diff line number Diff line
@@ -72,3 +72,25 @@ void selinux_get_task_sid(struct task_struct *tsk, u32 *sid) 
	*sid = 0;

}



int selinux_string_to_sid(char *str, u32 *sid)

{

	if (selinux_enabled)

		return security_context_to_sid(str, strlen(str), sid);

	else {

		*sid = 0;

		return 0;

	}

}

EXPORT_SYMBOL_GPL(selinux_string_to_sid);



int selinux_relabel_packet_permission(u32 sid)

{

	if (selinux_enabled) {

		struct task_security_struct *tsec = current->security;



		return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,

				    PACKET__RELABELTO, NULL);

	}

	return 0;

}

EXPORT_SYMBOL_GPL(selinux_relabel_packet_permission);