drbd: Implemented conn_lowest_conn()

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

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index 0ce665366d69..36703fee3b0c 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -133,6 +133,18 @@ enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn)
         return ds;
 }
 
+enum drbd_conns conn_lowest_conn(struct drbd_tconn *tconn)
+{
+        enum drbd_conns conn = C_MASK;
+        struct drbd_conf *mdev;
+        int vnr;
+
+        idr_for_each_entry(&tconn->volumes, mdev, vnr)
+                conn = min_t(enum drbd_conns, conn, mdev->state.conn);
+
+        return conn;
+}
+
 /**
  * cl_wide_st_chg() - true if the state change is a cluster wide one
  * @mdev:       DRBD device.