Add 'opendir' option

This option adds all files from a directory and downward in the
filesystem hierarchy.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index ec4f3e2..e54b37b 100644
--- a/HOWTO
+++ b/HOWTO
@@ -211,6 +211,9 @@
 		a job to open /dev/sda and /dev/sdb as the two working files,
 		you would use filename=/dev/sda:/dev/sdb
 
+opendir=str	Tell fio to recursively add any file it can find in this
+		directory and down the file system tree.
+
 rw=str		Type of io pattern. Accepted values are:
 
 			read		Sequential reads