1 files changed, 97 insertions, 5 deletions

diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index d7809a0620b4..fcdd6555a820 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -269,11 +269,6 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
 	trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage),
 			 here, NULL);
 
-	spin_lock_bh(&call->conn->params.peer->lock);
-	hlist_add_head(&call->error_link,
-		       &call->conn->params.peer->error_targets);
-	spin_unlock_bh(&call->conn->params.peer->lock);
-
 	rxrpc_start_call_timer(call);
 
 	_net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id);
@@ -304,6 +299,48 @@ error:
 }
 
 /*
+ * Retry a call to a new address.  It is expected that the Tx queue of the call
+ * will contain data previously packaged for an old call.
+ */
+int rxrpc_retry_client_call(struct rxrpc_sock *rx,
+			    struct rxrpc_call *call,
+			    struct rxrpc_conn_parameters *cp,
+			    struct sockaddr_rxrpc *srx,
+			    gfp_t gfp)
+{
+	const void *here = __builtin_return_address(0);
+	int ret;
+
+	/* Set up or get a connection record and set the protocol parameters,
+	 * including channel number and call ID.
+	 */
+	ret = rxrpc_connect_call(call, cp, srx, gfp);
+	if (ret < 0)
+		goto error;
+
+	trace_rxrpc_call(call, rxrpc_call_connected, atomic_read(&call->usage),
+			 here, NULL);
+
+	rxrpc_start_call_timer(call);
+
+	_net("CALL new %d on CONN %d", call->debug_id, call->conn->debug_id);
+
+	if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
+		rxrpc_queue_call(call);
+
+	_leave(" = 0");
+	return 0;
+
+error:
+	rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
+				  RX_CALL_DEAD, ret);
+	trace_rxrpc_call(call, rxrpc_call_error, atomic_read(&call->usage),
+			 here, ERR_PTR(ret));
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
  * Set up an incoming call.  call->conn points to the connection.
  * This is called in BH context and isn't allowed to fail.
  */
@@ -471,6 +508,61 @@ void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
 }
 
 /*
+ * Prepare a kernel service call for retry.
+ */
+int rxrpc_prepare_call_for_retry(struct rxrpc_sock *rx, struct rxrpc_call *call)
+{
+	const void *here = __builtin_return_address(0);
+	int i;
+	u8 last = 0;
+
+	_enter("{%d,%d}", call->debug_id, atomic_read(&call->usage));
+
+	trace_rxrpc_call(call, rxrpc_call_release, atomic_read(&call->usage),
+			 here, (const void *)call->flags);
+
+	ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
+	ASSERTCMP(call->completion, !=, RXRPC_CALL_REMOTELY_ABORTED);
+	ASSERTCMP(call->completion, !=, RXRPC_CALL_LOCALLY_ABORTED);
+	ASSERT(list_empty(&call->recvmsg_link));
+
+	del_timer_sync(&call->timer);
+
+	_debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, call->conn);
+
+	if (call->conn)
+		rxrpc_disconnect_call(call);
+
+	if (rxrpc_is_service_call(call) ||
+	    !call->tx_phase ||
+	    call->tx_hard_ack != 0 ||
+	    call->rx_hard_ack != 0 ||
+	    call->rx_top != 0)
+		return -EINVAL;
+
+	call->state = RXRPC_CALL_UNINITIALISED;
+	call->completion = RXRPC_CALL_SUCCEEDED;
+	call->call_id = 0;
+	call->cid = 0;
+	call->cong_cwnd = 0;
+	call->cong_extra = 0;
+	call->cong_ssthresh = 0;
+	call->cong_mode = 0;
+	call->cong_dup_acks = 0;
+	call->cong_cumul_acks = 0;
+	call->acks_lowest_nak = 0;
+
+	for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) {
+		last |= call->rxtx_annotations[i];
+		call->rxtx_annotations[i] &= RXRPC_TX_ANNO_LAST;
+		call->rxtx_annotations[i] |= RXRPC_TX_ANNO_RETRANS;
+	}
+
+	_leave(" = 0");
+	return 0;
+}
+
+/*
  * release all the calls associated with a socket
  */
 void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)