bug 5939: script to clean xenstore disk

scripts/vm/hypervisor/xenserver/xs_cleanup.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+#set -x
+ 
+usage() {
+  printf "Usage: %s \n" $(basename $0) >&2
+
+}
+
+# remove device which is in xenstore but not in xapi
+remove_device() {
+  be=$1
+  xenstore-write /local/domain/0/backend/tap/0/$be/online 0 &>/dev/null
+  xenstore-write /local/domain/0/backend/tap/0/$be/shutdown-request normal &>/dev/null
+  for i in $(seq 20)
+  do
+    sleep 1
+    xenstore-exists /local/domain/0/backend/tap/0/$be/shutdown-done &>/dev/null
+    if [ $? -eq 0 ] ; then
+      xenstore-rm /local/domain/0/device/vbd/$be &>/dev/null
+      xenstore-rm /local/domain/0/backend/tap/0/$be &>/dev/null
+      xenstore-rm /local/domain/0/error/backend/tap/0/$be &>/dev/null
+      xenstore-rm /local/domain/0/error/device/vbd/$be &>/dev/null
+      return
+    fi
+    xenstore-exists /local/domain/0/backend/tap/0/$be &>/dev/null
+    if [ $? -ne 0 ] ; then
+      return
+    fi
+  done
+
+  echo "unplug device $be failed"
+  exit 2
+}
+
+bes=`xenstore-list /local/domain/0/backend/tap/0`
+
+if [ -z "$bes" ]; then
+  exit 0
+fi
+
+for be in $bes
+do
+  device=`xenstore-read /local/domain/0/backend/tap/0/$be/dev`
+  ls $device >/dev/null 2>&1 
+  if [ $? -ne 0 ]; then
+    remove_device $be
+  fi
+done
+
+
+echo "======> DONE <======"
+exit 0
+