comment ni->{allocated,data}_size

include/ntfs/inode.h

@@ -134,8 +134,13 @@ struct _ntfs_inode {
 	int ref_count;
 
 	/* Below fields are valid only for base inode. */
-	s64 data_size;
-	s64 allocated_size;
+	s64 data_size;		/* Data size stored in the filename index. */
+	s64 allocated_size;	/* Allocated size stored in the filename
+				   index. (NOTE: Equal to allocated size of
+				   the unnamed data attribute for normal or
+				   encrypted files and to compressed size
+				   of the unnamed data attribute for sparse or
+				   compressed files.) */
 
 	time_t creation_time;
 	time_t last_data_change_time;