- * @ni: The NTFS inode for the file.
- * @inode: The WIM dentry that has an inode containing the streams.
+ * @ni: The NTFS inode to which the streams are to be extracted.
+ *
+ * @dentry: The WIM dentry being extracted. The @d_inode member points to the
+ * corresponding WIM inode that contains the streams being extracted.
+ * The WIM dentry itself is only needed to provide a file path for
+ * better error messages.
+ *
+ * @progress_info: Progress information for the image application. The number
+ * of extracted bytes will be incremented by the uncompressed
+ * size of each stream extracted.