Move selinux-related stuff from btrfs-util.c to label.c

In preparation for future changes.

src/basic/label.c

@@ -22,6 +22,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include "btrfs-util.h"
 #include "label.h"
 #include "macro.h"
 #include "selinux-util.h"
@@ -81,3 +82,21 @@ int symlink_label(const char *old_path, const char *new_path) {
 
         return mac_smack_fix(new_path, false, false);
 }
+
+int btrfs_subvol_make_label(const char *path) {
+        int r;
+
+        assert(path);
+
+        r = mac_selinux_create_file_prepare(path, S_IFDIR);
+        if (r < 0)
+                return r;
+
+        r = btrfs_subvol_make(path);
+        mac_selinux_create_file_clear();
+
+        if (r < 0)
+                return r;
+
+        return mac_smack_fix(path, false, false);
+}