Big rename! Renamed lfs -> lfs3 and lfsr -> lfs3

bd/lfs3_filebd.h

@@ -0,0 +1,56 @@
+/*
+ * Block device emulated in a file
+ *
+ * Copyright (c) 2022, The littlefs authors.
+ * Copyright (c) 2017, Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef LFS3_FILEBD_H
+#define LFS3_FILEBD_H
+
+#include "lfs3.h"
+#include "lfs3_util.h"
+
+
+// Block device specific tracing
+#ifndef LFS3_FILEBD_TRACE
+#ifdef LFS3_FILEBD_YES_TRACE
+#define LFS3_FILEBD_TRACE(...) LFS3_TRACE(__VA_ARGS__)
+#else
+#define LFS3_FILEBD_TRACE(...)
+#endif
+#endif
+
+// filebd state
+typedef struct lfs3_filebd {
+    int fd;
+} lfs3_filebd_t;
+
+
+// Create a file block device using the geometry in lfs3_config
+int lfs3_filebd_create(const struct lfs3_config *cfg, const char *path);
+
+// Clean up memory associated with block device
+int lfs3_filebd_destroy(const struct lfs3_config *cfg);
+
+// Read a block
+int lfs3_filebd_read(const struct lfs3_config *cfg, lfs3_block_t block,
+        lfs3_off_t off, void *buffer, lfs3_size_t size);
+
+// Program a block
+//
+// The block must have previously been erased.
+int lfs3_filebd_prog(const struct lfs3_config *cfg, lfs3_block_t block,
+        lfs3_off_t off, const void *buffer, lfs3_size_t size);
+
+// Erase a block
+//
+// A block must be erased before being programmed. The
+// state of an erased block is undefined.
+int lfs3_filebd_erase(const struct lfs3_config *cfg, lfs3_block_t block);
+
+// Sync the block device
+int lfs3_filebd_sync(const struct lfs3_config *cfg);
+
+
+#endif