drbd: Implemented two new connection states Ahead/Behind

In this connection mode, the ahead node no longer replicates
application IO. The behind's disk becomes out dated.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index 03a08baabf11..23f31be6f00d 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -206,6 +206,10 @@ enum drbd_conns {
         C_VERIFY_T,
         C_PAUSED_SYNC_S,
         C_PAUSED_SYNC_T,
+
+        C_AHEAD,
+        C_BEHIND,
+
         C_MASK = 31
 };