dlm: allow multiple lockspace creates

Add a count for lockspace create and release so that create can
be called multiple times to use the lockspace from different places.
Also add the new flag DLM_LSFL_NEWEXCL to create a lockspace with
the previous behavior of returning -EEXIST if the lockspace already
exists.

Signed-off-by: David Teigland <teigland@redhat.com>
diff --git a/include/linux/dlm_device.h b/include/linux/dlm_device.h
index c603450..3060783 100644
--- a/include/linux/dlm_device.h
+++ b/include/linux/dlm_device.h
@@ -26,7 +26,7 @@
 /* Version of the device interface */
 #define DLM_DEVICE_VERSION_MAJOR 6
 #define DLM_DEVICE_VERSION_MINOR 0
-#define DLM_DEVICE_VERSION_PATCH 0
+#define DLM_DEVICE_VERSION_PATCH 1
 
 /* struct passed to the lock write */
 struct dlm_lock_params {