drbd: --force option for disconnect

As the network connection can be lost at any time, a --force option
for disconnect is just a matter of completeness.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 6a6dde6c51c6..cd0459f0403f 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1531,6 +1531,21 @@ static int drbd_nl_disconnect(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
                               struct drbd_nl_cfg_reply *reply)
 {
         int retcode;
+        struct disconnect dc;
+
+        memset(&dc, 0, sizeof(struct disconnect));
+        if (!disconnect_from_tags(mdev, nlp->tag_list, &dc)) {
+                retcode = ERR_MANDATORY_TAG;
+                goto fail;
+        }
+
+        if (dc.force) {
+                spin_lock_irq(&mdev->req_lock);
+                if (mdev->state.conn >= C_WF_CONNECTION)
+                        _drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), CS_HARD, NULL);
+                spin_unlock_irq(&mdev->req_lock);
+                goto done;
+        }
 
         retcode = _drbd_request_state(mdev, NS(conn, C_DISCONNECTING), CS_ORDERED);