+ * 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 drivers support either or both of offset != 0
+ * and len != 0.
+ *
+ * @filename: full path of the file to read from
+ * @addr: address of the buffer to write to
+ * @offset: offset in the file from where to start reading
+ * @len: the number of bytes to read. Use 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 drivers support offset != 0.
+ *
+ * @filename: full path of the file to write to
+ * @addr: address of the buffer to read from
+ * @offset: offset in the file from where to start writing
+ * @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);
+
+/*
+ * Directory entry types, matches the subset of DT_x in posix readdir()
+ * which apply to u-boot.
+ */
+#define FS_DT_DIR 4 /* directory */
+#define FS_DT_REG 8 /* regular file */
+#define FS_DT_LNK 10 /* symbolic link */
+
+/*
+ * A directory entry, returned by fs_readdir(). Returns information
+ * about the file/directory at the current directory entry position.
+ */
+struct fs_dirent {
+ unsigned type; /* one of FS_DT_x (not a mask) */
+ loff_t size; /* size in bytes */
+ char name[256];
+};
+
+/* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
+struct fs_dir_stream {
+ /* private to fs. layer: */
+ struct blk_desc *desc;
+ int part;
+};
+
+/*
+ * fs_opendir - Open a directory
+ *
+ * @filename: the path to directory to open
+ * @return a pointer to the directory stream or NULL on error and errno
+ * set appropriately
+ */
+struct fs_dir_stream *fs_opendir(const char *filename);
+
+/*
+ * fs_readdir - Read the next directory entry in the directory stream.
+ *
+ * Works in an analogous way to posix readdir(). The previously returned
+ * directory entry is no longer valid after calling fs_readdir() again.
+ * After fs_closedir() is called, the returned directory entry is no
+ * longer valid.