selinux: wrap global selinux state

Define a selinux state structure (struct selinux_state) for
global SELinux state and pass it explicitly to all security server
functions.  The public portion of the structure contains state
that is used throughout the SELinux code, such as the enforcing mode.
The structure also contains a pointer to a selinux_ss structure whose
definition is private to the security server and contains security
server specific state such as the policy database and SID table.

This change should have no effect on SELinux behavior or APIs
(userspace or LSM).  It merely wraps SELinux state and passes it
explicitly as needed.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
[PM: minor fixups needed due to collisions with the SCTP patches]
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 2c3c7d010d8a..a2c9148b0662 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -655,7 +655,8 @@ int avtab_write(struct policydb *p, struct avtab *a, void *fp)
 
 	return rc;
 }
-void avtab_cache_init(void)
+
+void __init avtab_cache_init(void)
 {
 	avtab_node_cachep = kmem_cache_create("avtab_node",
 					      sizeof(struct avtab_node),
@@ -664,9 +665,3 @@ void avtab_cache_init(void)
 						sizeof(struct avtab_extended_perms),
 						0, SLAB_PANIC, NULL);
 }
-
-void avtab_cache_destroy(void)
-{
-	kmem_cache_destroy(avtab_node_cachep);
-	kmem_cache_destroy(avtab_xperms_cachep);
-}