ceph: reset bits on connection close

Clear LOSSYTX bit, so that if/when we reconnect, said reconnect
will retry on failure.

Clear _PENDING bits too, to avoid polluting subsequent
connection state.

Drop unused REGISTERED bit.
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/messenger.c

@@ -342,6 +342,9 @@ void ceph_con_close(struct ceph_connection *con)
 	dout("con_close %p peer %s\n", con, pr_addr(&con->peer_addr.in_addr));
 	set_bit(CLOSED, &con->state);  /* in case there's queued work */
 	clear_bit(STANDBY, &con->state);  /* avoid connect_seq bump */
+	clear_bit(LOSSYTX, &con->state);  /* so we retry next connect */
+	clear_bit(KEEPALIVE_PENDING, &con->state);
+	clear_bit(WRITE_PENDING, &con->state);
 	mutex_lock(&con->mutex);
 	reset_connection(con);
 	cancel_delayed_work(&con->work);

fs/ceph/messenger.h

@@ -119,7 +119,6 @@ struct ceph_msg_pos {
 			    * state with the peer. */
 #define CLOSED		10 /* we've closed the connection */
 #define SOCK_CLOSED	11 /* socket state changed to closed */
-#define REGISTERED      12 /* connection appears in con_tree */
 #define OPENING         13 /* open connection w/ (possibly new) peer */
 #define DEAD            14 /* dead, about to kfree */