+int fs_exists(const char *filename);
+
+/*
+ * fs_size - Determine a file's size
+ *
+ * @filename: Name of the file
+ * @size: Size of file
+ * @return 0 if ok with valid *size, negative on error
+ */
+int fs_size(const char *filename, loff_t *size);
+
+/*
+ * fs_read - Read file from the partition previously set by fs_set_blk_dev()
+ * Note that not all filesystem types support either/both offset!=0 or len!=0.
+ *
+ * @filename: Name of file to read from
+ * @addr: The address to read into
+ * @offset: The offset in file to read from
+ * @len: The number of bytes to read. Maybe 0 to read entire file
+ * @actread: Returns the actual number of bytes read
+ * @return 0 if ok with valid *actread, -1 on error conditions
+ */
+int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
+ loff_t *actread);
+
+/*
+ * fs_write - Write file to the partition previously set by fs_set_blk_dev()
+ * Note that not all filesystem types support offset!=0.
+ *
+ * @filename: Name of file to read from
+ * @addr: The address to read into
+ * @offset: The offset in file to read from. Maybe 0 to write to start of file
+ * @len: The number of bytes to write
+ * @actwrite: Returns the actual number of bytes written
+ * @return 0 if ok with valid *actwrite, -1 on error conditions
+ */
+int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
+ loff_t *actwrite);