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1/*
2 * linux/include/linux/sunrpc/clnt.h
3 *
4 * Declarations for the high-level RPC client interface
5 *
6 * Copyright (C) 1995, 1996, Olaf Kirch <okir@monad.swb.de>
7 */
8
9#ifndef _LINUX_SUNRPC_CLNT_H
10#define _LINUX_SUNRPC_CLNT_H
11
12#include <linux/sunrpc/msg_prot.h>
13#include <linux/sunrpc/sched.h>
14#include <linux/sunrpc/xprt.h>
15#include <linux/sunrpc/auth.h>
16#include <linux/sunrpc/stats.h>
17#include <linux/sunrpc/xdr.h>
18#include <linux/sunrpc/timer.h>
19#include <asm/signal.h>
20
21struct rpc_inode;
22
23/*
24 * The high-level client handle
25 */
26struct rpc_clnt {
27 struct kref cl_kref; /* Number of references */
28 struct list_head cl_clients; /* Global list of clients */
29 struct list_head cl_tasks; /* List of tasks */
30 spinlock_t cl_lock; /* spinlock */
31 struct rpc_xprt * cl_xprt; /* transport */
32 struct rpc_procinfo * cl_procinfo; /* procedure info */
33 u32 cl_prog, /* RPC program number */
34 cl_vers, /* RPC version number */
35 cl_maxproc; /* max procedure number */
36
37 char * cl_server; /* server machine name */
38 char * cl_protname; /* protocol name */
39 struct rpc_auth * cl_auth; /* authenticator */
40 struct rpc_stat * cl_stats; /* per-program statistics */
41 struct rpc_iostats * cl_metrics; /* per-client statistics */
42
43 unsigned int cl_softrtry : 1,/* soft timeouts */
44 cl_discrtry : 1,/* disconnect before retry */
45 cl_autobind : 1;/* use getport() */
46
47 struct rpc_rtt * cl_rtt; /* RTO estimator data */
48 const struct rpc_timeout *cl_timeout; /* Timeout strategy */
49
50 int cl_nodelen; /* nodename length */
51 char cl_nodename[UNX_MAXNODENAME];
52 char cl_pathname[30];/* Path in rpc_pipe_fs */
53 struct vfsmount * cl_vfsmnt;
54 struct dentry * cl_dentry; /* inode */
55 struct rpc_clnt * cl_parent; /* Points to parent of clones */
56 struct rpc_rtt cl_rtt_default;
57 struct rpc_timeout cl_timeout_default;
58 struct rpc_program * cl_program;
59 char cl_inline_name[32];
60};
61
62/*
63 * General RPC program info
64 */
65#define RPC_MAXVERSION 4
66struct rpc_program {
67 char * name; /* protocol name */
68 u32 number; /* program number */
69 unsigned int nrvers; /* number of versions */
70 struct rpc_version ** version; /* version array */
71 struct rpc_stat * stats; /* statistics */
72 char * pipe_dir_name; /* path to rpc_pipefs dir */
73};
74
75struct rpc_version {
76 u32 number; /* version number */
77 unsigned int nrprocs; /* number of procs */
78 struct rpc_procinfo * procs; /* procedure array */
79};
80
81/*
82 * Procedure information
83 */
84struct rpc_procinfo {
85 u32 p_proc; /* RPC procedure number */
86 kxdrproc_t p_encode; /* XDR encode function */
87 kxdrproc_t p_decode; /* XDR decode function */
88 unsigned int p_arglen; /* argument hdr length (u32) */
89 unsigned int p_replen; /* reply hdr length (u32) */
90 unsigned int p_count; /* call count */
91 unsigned int p_timer; /* Which RTT timer to use */
92 u32 p_statidx; /* Which procedure to account */
93 char * p_name; /* name of procedure */
94};
95
96#ifdef __KERNEL__
97
98struct rpc_create_args {
99 int protocol;
100 struct sockaddr *address;
101 size_t addrsize;
102 struct sockaddr *saddress;
103 const struct rpc_timeout *timeout;
104 char *servername;
105 struct rpc_program *program;
106 u32 version;
107 rpc_authflavor_t authflavor;
108 unsigned long flags;
109};
110
111/* Values for "flags" field */
112#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
113#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
114#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
115#define RPC_CLNT_CREATE_NOPING (1UL << 4)
116#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
117
118struct rpc_clnt *rpc_create(struct rpc_create_args *args);
119struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
120 struct rpc_program *, u32);
121struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
122void rpc_shutdown_client(struct rpc_clnt *);
123void rpc_release_client(struct rpc_clnt *);
124
125int rpcb_register(u32, u32, int, unsigned short, int *);
126int rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
127void rpcb_getport_async(struct rpc_task *);
128
129void rpc_call_start(struct rpc_task *);
130int rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
131 int flags, const struct rpc_call_ops *tk_ops,
132 void *calldata);
133int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
134 int flags);
135struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
136 int flags);
137void rpc_restart_call(struct rpc_task *);
138void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
139size_t rpc_max_payload(struct rpc_clnt *);
140void rpc_force_rebind(struct rpc_clnt *);
141size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
142const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
143
144#endif /* __KERNEL__ */
145#endif /* _LINUX_SUNRPC_CLNT_H */