qa/workunits/fs/misc: Add a workunit for tar kernel Documents

the test fails if some files were changed while being archived

Signed-off-by: Yan, Zheng <zyan@redhat.com>

qa/workunits/fs/misc/kernel_untar_tar.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# check if there is file changed while being archived
+
+set -e
+
+KERNEL=linux-4.0.5
+
+wget -q http://download.ceph.com/qa/$KERNEL.tar.xz
+
+mkdir untar_tar
+cd untar_tar
+
+tar Jxvf ../$KERNEL.tar.xz $KERNEL/Documentation/
+tar cf doc.tar $KERNEL
+
+tar xf doc.tar
+sync
+tar c $KERNEL >/dev/null
+
+rm -rf $KERNEL
+
+tar xf doc.tar
+sync
+tar c $KERNEL >/dev/null
+
+echo Ok