v4.19.13 snapshot.
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
new file mode 100644
index 0000000..73d5c4a
--- /dev/null
+++ b/include/linux/sunrpc/clnt.h
@@ -0,0 +1,229 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * linux/include/linux/sunrpc/clnt.h
+ *
+ * Declarations for the high-level RPC client interface
+ *
+ * Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _LINUX_SUNRPC_CLNT_H
+#define _LINUX_SUNRPC_CLNT_H
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+
+#include <linux/sunrpc/msg_prot.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/xprt.h>
+#include <linux/sunrpc/auth.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/timer.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
+#include <asm/signal.h>
+#include <linux/path.h>
+#include <net/ipv6.h>
+#include <linux/sunrpc/xprtmultipath.h>
+
+struct rpc_inode;
+
+/*
+ * The high-level client handle
+ */
+struct rpc_clnt {
+ atomic_t cl_count; /* Number of references */
+ unsigned int cl_clid; /* client id */
+ struct list_head cl_clients; /* Global list of clients */
+ struct list_head cl_tasks; /* List of tasks */
+ spinlock_t cl_lock; /* spinlock */
+ struct rpc_xprt __rcu * cl_xprt; /* transport */
+ const struct rpc_procinfo *cl_procinfo; /* procedure info */
+ u32 cl_prog, /* RPC program number */
+ cl_vers, /* RPC version number */
+ cl_maxproc; /* max procedure number */
+
+ struct rpc_auth * cl_auth; /* authenticator */
+ struct rpc_stat * cl_stats; /* per-program statistics */
+ struct rpc_iostats * cl_metrics; /* per-client statistics */
+
+ unsigned int cl_softrtry : 1,/* soft timeouts */
+ cl_discrtry : 1,/* disconnect before retry */
+ cl_noretranstimeo: 1,/* No retransmit timeouts */
+ cl_autobind : 1,/* use getport() */
+ cl_chatty : 1;/* be verbose */
+
+ struct rpc_rtt * cl_rtt; /* RTO estimator data */
+ const struct rpc_timeout *cl_timeout; /* Timeout strategy */
+
+ atomic_t cl_swapper; /* swapfile count */
+ int cl_nodelen; /* nodename length */
+ char cl_nodename[UNX_MAXNODENAME+1];
+ struct rpc_pipe_dir_head cl_pipedir_objects;
+ struct rpc_clnt * cl_parent; /* Points to parent of clones */
+ struct rpc_rtt cl_rtt_default;
+ struct rpc_timeout cl_timeout_default;
+ const struct rpc_program *cl_program;
+#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
+ struct dentry *cl_debugfs; /* debugfs directory */
+#endif
+ struct rpc_xprt_iter cl_xpi;
+};
+
+/*
+ * General RPC program info
+ */
+#define RPC_MAXVERSION 4
+struct rpc_program {
+ const char * name; /* protocol name */
+ u32 number; /* program number */
+ unsigned int nrvers; /* number of versions */
+ const struct rpc_version ** version; /* version array */
+ struct rpc_stat * stats; /* statistics */
+ const char * pipe_dir_name; /* path to rpc_pipefs dir */
+};
+
+struct rpc_version {
+ u32 number; /* version number */
+ unsigned int nrprocs; /* number of procs */
+ const struct rpc_procinfo *procs; /* procedure array */
+ unsigned int *counts; /* call counts */
+};
+
+/*
+ * Procedure information
+ */
+struct rpc_procinfo {
+ u32 p_proc; /* RPC procedure number */
+ kxdreproc_t p_encode; /* XDR encode function */
+ kxdrdproc_t p_decode; /* XDR decode function */
+ unsigned int p_arglen; /* argument hdr length (u32) */
+ unsigned int p_replen; /* reply hdr length (u32) */
+ unsigned int p_timer; /* Which RTT timer to use */
+ u32 p_statidx; /* Which procedure to account */
+ const char * p_name; /* name of procedure */
+};
+
+#ifdef __KERNEL__
+
+struct rpc_create_args {
+ struct net *net;
+ int protocol;
+ struct sockaddr *address;
+ size_t addrsize;
+ struct sockaddr *saddress;
+ const struct rpc_timeout *timeout;
+ const char *servername;
+ const char *nodename;
+ const struct rpc_program *program;
+ u32 prognumber; /* overrides program->number */
+ u32 version;
+ rpc_authflavor_t authflavor;
+ unsigned long flags;
+ char *client_name;
+ struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
+};
+
+struct rpc_add_xprt_test {
+ int (*add_xprt_test)(struct rpc_clnt *,
+ struct rpc_xprt *,
+ void *calldata);
+ void *data;
+};
+
+/* Values for "flags" field */
+#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
+#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
+#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
+#define RPC_CLNT_CREATE_NOPING (1UL << 4)
+#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
+#define RPC_CLNT_CREATE_QUIET (1UL << 6)
+#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)
+
+struct rpc_clnt *rpc_create(struct rpc_create_args *args);
+struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
+ const struct rpc_program *, u32);
+struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
+struct rpc_clnt *rpc_clone_client_set_auth(struct rpc_clnt *,
+ rpc_authflavor_t);
+int rpc_switch_client_transport(struct rpc_clnt *,
+ struct xprt_create *,
+ const struct rpc_timeout *);
+
+void rpc_shutdown_client(struct rpc_clnt *);
+void rpc_release_client(struct rpc_clnt *);
+void rpc_task_release_transport(struct rpc_task *);
+void rpc_task_release_client(struct rpc_task *);
+
+int rpcb_create_local(struct net *);
+void rpcb_put_local(struct net *);
+int rpcb_register(struct net *, u32, u32, int, unsigned short);
+int rpcb_v4_register(struct net *net, const u32 program,
+ const u32 version,
+ const struct sockaddr *address,
+ const char *netid);
+void rpcb_getport_async(struct rpc_task *);
+
+void rpc_call_start(struct rpc_task *);
+int rpc_call_async(struct rpc_clnt *clnt,
+ const struct rpc_message *msg, int flags,
+ const struct rpc_call_ops *tk_ops,
+ void *calldata);
+int rpc_call_sync(struct rpc_clnt *clnt,
+ const struct rpc_message *msg, int flags);
+struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
+ int flags);
+int rpc_restart_call_prepare(struct rpc_task *);
+int rpc_restart_call(struct rpc_task *);
+void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
+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 *);
+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);
+int rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);
+
+int rpc_clnt_iterate_for_each_xprt(struct rpc_clnt *clnt,
+ int (*fn)(struct rpc_clnt *, struct rpc_xprt *, void *),
+ void *data);
+
+int rpc_clnt_test_and_add_xprt(struct rpc_clnt *clnt,
+ struct rpc_xprt_switch *xps,
+ struct rpc_xprt *xprt,
+ void *dummy);
+int rpc_clnt_add_xprt(struct rpc_clnt *, struct xprt_create *,
+ int (*setup)(struct rpc_clnt *,
+ struct rpc_xprt_switch *,
+ struct rpc_xprt *,
+ void *),
+ void *data);
+void rpc_set_connect_timeout(struct rpc_clnt *clnt,
+ unsigned long connect_timeout,
+ unsigned long reconnect_timeout);
+
+int rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *,
+ struct rpc_xprt_switch *,
+ struct rpc_xprt *,
+ void *);
+
+const char *rpc_proc_name(const struct rpc_task *task);
+
+void rpc_clnt_xprt_switch_put(struct rpc_clnt *);
+void rpc_clnt_xprt_switch_add_xprt(struct rpc_clnt *, struct rpc_xprt *);
+bool rpc_clnt_xprt_switch_has_addr(struct rpc_clnt *clnt,
+ const struct sockaddr *sap);
+void rpc_cleanup_clids(void);
+
+static inline int rpc_reply_expected(struct rpc_task *task)
+{
+ return (task->tk_msg.rpc_proc != NULL) &&
+ (task->tk_msg.rpc_proc->p_decode != NULL);
+}
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_SUNRPC_CLNT_H */