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Commit 7b3fef8e authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Respect RPC call timeouts when retrying transmission 



Fix a regression where soft and softconn requests are not timing out
as expected.

Fixes: 89f90fe1 ("SUNRPC: Allow calls to xprt_transmit() to drain...")
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 477687e1

net/sunrpc/clnt.c

+24 −18
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ static int rpc_encode_header(struct rpc_task *task, 
static int	rpc_decode_header(struct rpc_task *task,

				  struct xdr_stream *xdr);

static int	rpc_ping(struct rpc_clnt *clnt);

static void	rpc_check_timeout(struct rpc_task *task);



static void rpc_register_client(struct rpc_clnt *clnt)

{
@@ -1962,8 +1963,7 @@ call_connect_status(struct rpc_task *task) 
			break;

		if (clnt->cl_autobind) {

			rpc_force_rebind(clnt);

			task->tk_action = call_bind;

			return;

			goto out_retry;

		}

		/* fall through */

	case -ECONNRESET:
@@ -1983,16 +1983,19 @@ call_connect_status(struct rpc_task *task) 
		/* fall through */

	case -ENOTCONN:

	case -EAGAIN:

		/* Check for timeouts before looping back to call_bind */

	case -ETIMEDOUT:

		task->tk_action = call_timeout;

		return;

		goto out_retry;

	case 0:

		clnt->cl_stats->netreconn++;

		task->tk_action = call_transmit;

		return;

	}

	rpc_exit(task, status);

	return;

out_retry:

	/* Check for timeouts before looping back to call_bind */

	task->tk_action = call_bind;

	rpc_check_timeout(task);

}



/*
@@ -2069,7 +2072,7 @@ call_transmit_status(struct rpc_task *task) 
				trace_xprt_ping(task->tk_xprt,

						task->tk_status);

			rpc_exit(task, task->tk_status);

			break;

			return;

		}

		/* fall through */

	case -ECONNRESET:
@@ -2081,6 +2084,7 @@ call_transmit_status(struct rpc_task *task) 
		task->tk_status = 0;

		break;

	}

	rpc_check_timeout(task);

}



#if defined(CONFIG_SUNRPC_BACKCHANNEL)
@@ -2217,7 +2221,7 @@ call_status(struct rpc_task *task) 
	case -EPIPE:

	case -ENOTCONN:

	case -EAGAIN:

		task->tk_action = call_encode;

		task->tk_action = call_timeout;

		break;

	case -EIO:

		/* shutdown or soft timeout */
@@ -2231,20 +2235,13 @@ call_status(struct rpc_task *task) 
	}

}



/*

 * 6a.	Handle RPC timeout

 * 	We do not release the request slot, so we keep using the

 *	same XID for all retransmits.

 */

static void

call_timeout(struct rpc_task *task)

rpc_check_timeout(struct rpc_task *task)

{

	struct rpc_clnt	*clnt = task->tk_client;



	if (xprt_adjust_timeout(task->tk_rqstp) == 0) {

		dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid);

		goto retry;

	}

	if (xprt_adjust_timeout(task->tk_rqstp) == 0)

		return;



	dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid);

	task->tk_timeouts++;
@@ -2280,10 +2277,19 @@ call_timeout(struct rpc_task *task) 
	 * event? RFC2203 requires the server to drop all such requests.

	 */

	rpcauth_invalcred(task);

}



retry:

/*

 * 6a.	Handle RPC timeout

 * 	We do not release the request slot, so we keep using the

 *	same XID for all retransmits.

 */

static void

call_timeout(struct rpc_task *task)

{

	task->tk_action = call_encode;

	task->tk_status = 0;

	rpc_check_timeout(task);

}



/*