qa: test subdir mounts

qa/client/30_subdir_mount.sh

@@ -0,0 +1,22 @@
+#!/bin/bash -x
+
+basedir=`echo $0 | sed 's/[^/]*$//g'`.
+. $basedir/common.sh
+
+mount
+mkdir -p $mnt/sub
+echo sub > $mnt/sub/file
+umount
+
+mkdir -p $mnt/1
+mkdir -p $mnt/2
+/bin/mount -t ceph $monhost:/sub $mnt/1
+grep sub $mnt/1/file
+
+/bin/mount -t ceph $monhost:/ $mnt/2
+grep sub $mnt/2/sub/file
+
+/bin/umount $mnt/1
+grep sub $mnt/2/sub/file
+
+/bin/umount $mnt/2