Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 73d5c4a..abc63bd 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -50,6 +50,7 @@
 	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() */
@@ -66,10 +67,12 @@
 	struct rpc_rtt		cl_rtt_default;
 	struct rpc_timeout	cl_timeout_default;
 	const struct rpc_program *cl_program;
+	const char *		cl_principal;	/* use for machine cred */
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 	struct dentry		*cl_debugfs;	/* debugfs directory */
 #endif
 	struct rpc_xprt_iter	cl_xpi;
+	const struct cred	*cl_cred;
 };
 
 /*
@@ -121,14 +124,16 @@
 	u32			prognumber;	/* overrides program->number */
 	u32			version;
 	rpc_authflavor_t	authflavor;
+	u32			nconnect;
 	unsigned long		flags;
 	char			*client_name;
 	struct svc_xprt		*bc_xprt;	/* NFSv4.1 backchannel */
+	const struct cred	*cred;
 };
 
 struct rpc_add_xprt_test {
-	int (*add_xprt_test)(struct rpc_clnt *,
-		struct rpc_xprt *,
+	void (*add_xprt_test)(struct rpc_clnt *clnt,
+		struct rpc_xprt *xprt,
 		void *calldata);
 	void *data;
 };
@@ -143,6 +148,7 @@
 #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 *,
@@ -158,6 +164,8 @@
 void		rpc_release_client(struct rpc_clnt *);
 void		rpc_task_release_transport(struct rpc_task *);
 void		rpc_task_release_client(struct rpc_task *);
+struct rpc_xprt	*rpc_task_get_xprt(struct rpc_clnt *clnt,
+		struct rpc_xprt *xprt);
 
 int		rpcb_create_local(struct net *);
 void		rpcb_put_local(struct net *);
@@ -168,6 +176,9 @@
 				 const char *netid);
 void		rpcb_getport_async(struct rpc_task *);
 
+void rpc_prepare_reply_pages(struct rpc_rqst *req, struct page **pages,
+			     unsigned int base, unsigned int len,
+			     unsigned int hdrsize);
 void		rpc_call_start(struct rpc_task *);
 int		rpc_call_async(struct rpc_clnt *clnt,
 			       const struct rpc_message *msg, int flags,
@@ -183,6 +194,7 @@
 struct net *	rpc_net_ns(struct rpc_clnt *);
 size_t		rpc_max_payload(struct rpc_clnt *);
 size_t		rpc_max_bc_payload(struct rpc_clnt *);
+unsigned int	rpc_num_bc_slots(struct rpc_clnt *);
 void		rpc_force_rebind(struct rpc_clnt *);
 size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
 const char	*rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);