filesystem: introduce fs_cgroup_filetrans interface

policy/modules/kernel/filesystem.if

@@ -942,6 +942,42 @@ interface(`fs_mounton_cgroup', `
 	allow $1 cgroup_t:dir mounton;
 ')
 
+########################################
+## <summary>
+##	Create an object in a cgroup tmpfs filesystem, with a private
+##	type using a type transition.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+## <param name="private type">
+##	<summary>
+##	The type of the object to be created.
+##	</summary>
+## </param>
+## <param name="object">
+##	<summary>
+##	The object class of the object being created.
+##	</summary>
+## </param>
+## <param name="name" optional="true">
+##	<summary>
+##	The name of the object being created.
+##	</summary>
+## </param>
+#
+interface(`fs_cgroup_filetrans',`
+	gen_require(`
+		type cgroup_t, tmpfs_t;
+	')
+
+	allow $2 tmpfs_t:filesystem associate;
+	filetrans_pattern($1, cgroup_t, $2, $3, $4)
+	fs_search_sysfs($1)
+')
+
 ########################################
 ## <summary>
 ##	Do not audit attempts to read