[PATCH] selinux: add hooks for key subsystem

Introduce SELinux hooks to support the access key retention subsystem
within the kernel.  Incorporate new flask headers from a modified version
of the SELinux reference policy, with support for the new security class
representing retained keys.  Extend the "key_alloc" security hook with a
task parameter representing the intended ownership context for the key
being allocated.  Attach security information to root's default keyrings
within the SELinux initialization routine.

Has passed David's testsuite.

Signed-off-by: Michael LeMay <mdlemay@epoch.ncsc.mil>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h
index a0eb9e2..95887ae 100644
--- a/security/selinux/include/flask.h
+++ b/security/selinux/include/flask.h
@@ -62,6 +62,7 @@
 #define SECCLASS_NETLINK_KOBJECT_UEVENT_SOCKET           55
 #define SECCLASS_APPLETALK_SOCKET                        56
 #define SECCLASS_PACKET                                  57
+#define SECCLASS_KEY                                     58
 
 /*
  * Security identifier indices for initial entities