[PATCH] support for context based audit filtering

The following patch provides selinux interfaces that will allow the audit
system to perform filtering based on the process context (user, role, type,
sensitivity, and clearance).  These interfaces will allow the selinux
module to perform efficient matches based on lower level selinux constructs,
rather than relying on context retrievals and string comparisons within
the audit module.  It also allows for dominance checks on the mls portion
of the contexts that are impossible with only string comparisons.

Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

security/selinux/ss/mls.h

@@ -8,7 +8,7 @@
  *
  *	Support for enhanced MLS infrastructure.
  *
- * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
+ * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
  */
 
 #ifndef _SS_MLS_H_
@@ -27,6 +27,8 @@ int mls_context_to_sid(char oldc,
 		       struct sidtab *s,
 		       u32 def_sid);
 
+int mls_from_string(char *str, struct context *context, gfp_t gfp_mask);
+
 int mls_convert_context(struct policydb *oldp,
 			struct policydb *newp,
 			struct context *context);