SUNRPC: Add the 'softerr' rpc_client flag

Add the 'softerr' rpc client flag that sets the RPC_TASK_TIMEOUT
flag on all new rpc tasks that are attached to that rpc client.
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com>

include/linux/sunrpc/clnt.h

@@ -50,6 +50,7 @@ struct rpc_clnt {
 	struct rpc_iostats *	cl_metrics;	/* per-client statistics */
 
 	unsigned int		cl_softrtry : 1,/* soft timeouts */
+				cl_softerr  : 1,/* Timeouts return errors */
 				cl_discrtry : 1,/* disconnect before retry */
 				cl_noretranstimeo: 1,/* No retransmit timeouts */
 				cl_autobind : 1,/* use getport() */
@@ -144,6 +145,7 @@ struct rpc_add_xprt_test {
 #define RPC_CLNT_CREATE_INFINITE_SLOTS	(1UL << 7)
 #define RPC_CLNT_CREATE_NO_IDLE_TIMEOUT	(1UL << 8)
 #define RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT	(1UL << 9)
+#define RPC_CLNT_CREATE_SOFTERR		(1UL << 10)
 
 struct rpc_clnt *rpc_create(struct rpc_create_args *args);
 struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,

net/sunrpc/clnt.c

@@ -484,8 +484,11 @@ static struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args,
 	}
 
 	clnt->cl_softrtry = 1;
-	if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
+	if (args->flags & (RPC_CLNT_CREATE_HARDRTRY|RPC_CLNT_CREATE_SOFTERR)) {
 		clnt->cl_softrtry = 0;
+		if (args->flags & RPC_CLNT_CREATE_SOFTERR)
+			clnt->cl_softerr = 1;
+	}
 
 	if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
 		clnt->cl_autobind = 1;
@@ -623,6 +626,7 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
 	/* Turn off autobind on clones */
 	new->cl_autobind = 0;
 	new->cl_softrtry = clnt->cl_softrtry;
+	new->cl_softerr = clnt->cl_softerr;
 	new->cl_noretranstimeo = clnt->cl_noretranstimeo;
 	new->cl_discrtry = clnt->cl_discrtry;
 	new->cl_chatty = clnt->cl_chatty;
@@ -1001,6 +1005,8 @@ void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt)
 		atomic_inc(&clnt->cl_count);
 		if (clnt->cl_softrtry)
 			task->tk_flags |= RPC_TASK_SOFT;
+		if (clnt->cl_softerr)
+			task->tk_flags |= RPC_TASK_TIMEOUT;
 		if (clnt->cl_noretranstimeo)
 			task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT;
 		if (atomic_read(&clnt->cl_swapper))