xsm: move FLASK_AVC_STATS to Kconfig

Have Kconfig set CONFIG_FLASK_AVC_STATS and prefix all uses with CONFIG_
to use the Kconfig variable.

Note that will preserve the original behavior - which is that you
cannot disable FLASK_AVC_STATS. Enterprising users can disable
it without any compilation issues.

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>

xen/common/Kconfig

@@ -23,6 +23,12 @@ config FLASK
 
 	  If unsure, say N.
 
+config FLASK_AVC_STATS
+	def_bool y
+	depends on FLASK
+	---help---
+	  Maintain statistics on the access vector cache
+
 # Select HAS_DEVICE_TREE if device tree is supported
 config HAS_DEVICE_TREE
 	bool

xen/include/xen/config.h

@@ -78,11 +78,6 @@
 #define __STR(...) #__VA_ARGS__
 #define STR(...) __STR(__VA_ARGS__)
 
-#ifdef CONFIG_FLASK
-/* Maintain statistics on the access vector cache */
-#define FLASK_AVC_STATS 1
-#endif
-
 /* allow existing code to work with Kconfig variable */
 #define NR_CPUS CONFIG_NR_CPUS
 

xen/xsm/flask/avc.c

@@ -56,7 +56,7 @@ const struct selinux_class_perm selinux_class_perm = {
 #define AVC_DEF_CACHE_THRESHOLD        512
 #define AVC_CACHE_RECLAIM        16
 
-#ifdef FLASK_AVC_STATS
+#ifdef CONFIG_FLASK_AVC_STATS
 #define avc_cache_stats_incr(field)                 \
 do {                                \
     __get_cpu_var(avc_cache_stats).field++;        \
@@ -101,7 +101,7 @@ struct avc_callback_node {
 /* Exported via Flask hypercall */
 unsigned int avc_cache_threshold = AVC_DEF_CACHE_THRESHOLD;
 
-#ifdef FLASK_AVC_STATS
+#ifdef CONFIG_FLASK_AVC_STATS
 DEFINE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 #endif
 

xen/xsm/flask/flask_op.c

@@ -469,7 +469,7 @@ static int flask_security_make_bools(void)
     return ret;
 }
 
-#ifdef FLASK_AVC_STATS
+#ifdef CONFIG_FLASK_AVC_STATS
 
 static int flask_security_avc_cachestats(struct xen_flask_cache_stats *arg)
 {
@@ -761,7 +761,7 @@ ret_t do_flask_op(XEN_GUEST_HANDLE_PARAM(xsm_op_t) u_flask_op)
         rv = avc_get_hash_stats(&op.u.hash_stats);
         break;
 
-#ifdef FLASK_AVC_STATS
+#ifdef CONFIG_FLASK_AVC_STATS
     case FLASK_AVC_CACHESTATS:
         rv = flask_security_avc_cachestats(&op.u.cache_stats);
         break;

xen/xsm/flask/include/avc.h

@@ -108,7 +108,7 @@ struct xen_flask_hash_stats;
 int avc_get_hash_stats(struct xen_flask_hash_stats *arg);
 extern unsigned int avc_cache_threshold;
 
-#ifdef FLASK_AVC_STATS
+#ifdef CONFIG_FLASK_AVC_STATS
 DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 #endif