SUNRPC: Support for congestion control when queuing is enabled
Both RDMA and UDP transports require the request to get a "congestion control"
credit before they can be transmitted. Right now, this is done when
the request locks the socket. We'd like it to happen when a request attempts
to be transmitted for the first time.
In order to support retransmission of requests that already hold such
credits, we also want to ensure that they get queued first, so that we
don't deadlock with requests that have yet to obtain a credit.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 8dc3d33..f03911f 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1996,6 +1996,11 @@ call_transmit_status(struct rpc_task *task)
dprint_status(task);
xprt_end_transmit(task);
break;
+ case -EBADSLT:
+ xprt_end_transmit(task);
+ task->tk_action = call_transmit;
+ task->tk_status = 0;
+ break;
case -EBADMSG:
xprt_end_transmit(task);
task->tk_status = 0;
