fs.mitm: Implement bis protection

stratosphere/ams_mitm/source/fs_mitm/fs_shim.h

@@ -0,0 +1,19 @@
+/**
+ * @file fs_shim.h
+ * @brief Filesystem Services (fs) IPC wrapper for fs.mitm.
+ * @author SciresM
+ * @copyright libnx Authors
+ */
+#pragma once
+#include <switch.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Missing fsp-srv commands. */
+Result fsOpenBisStorageFwd(Service* s, FsStorage* out, FsBisPartitionId partition_id);
+
+#ifdef __cplusplus
+}
+#endif