summaryrefslogtreecommitdiffstats
path: root/include/linux/sunrpc/clnt.h
blob: 2709caf4d1283c43308589824bf468c7e34b8683 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
 *  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/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 <asm/signal.h>

/*
 * This defines an RPC port mapping
 */
struct rpc_portmap {
	__u32			pm_prog;
	__u32			pm_vers;
	__u32			pm_prot;
	__u16			pm_port;
	unsigned char		pm_binding : 1;	/* doing a getport() */
	struct rpc_wait_queue	pm_bindwait;	/* waiting on getport() */
};

struct rpc_inode;

/*
 * The high-level client handle
 */
struct rpc_clnt {
	atomic_t		cl_count;	/* Number of clones */
	atomic_t		cl_users;	/* number of references */
	struct rpc_xprt *	cl_xprt;	/* transport */
	struct rpc_procinfo *	cl_procinfo;	/* procedure info */
	u32			cl_maxproc;	/* max procedure number */

	char *			cl_server;	/* server machine name */
	char *			cl_protname;	/* protocol name */
	struct rpc_auth *	cl_auth;	/* authenticator */
	struct rpc_stat *	cl_stats;	/* statistics */

	unsigned int		cl_softrtry : 1,/* soft timeouts */
				cl_intr     : 1,/* interruptible */
				cl_chatty   : 1,/* be verbose */
				cl_autobind : 1,/* use getport() */
				cl_oneshot  : 1,/* dispose after use */
				cl_dead     : 1;/* abandoned */

	struct rpc_rtt *	cl_rtt;		/* RTO estimator data */
	struct rpc_portmap *	cl_pmap;	/* port mapping */

	int			cl_nodelen;	/* nodename length */
	char 			cl_nodename[UNX_MAXNODENAME];
	char			cl_pathname[30];/* Path in rpc_pipe_fs */
	struct dentry *		cl_dentry;	/* inode */
	struct rpc_clnt *	cl_parent;	/* Points to parent of clones */
	struct rpc_rtt		cl_rtt_default;
	struct rpc_portmap	cl_pmap_default;
	char			cl_inline_name[32];
};
#define cl_timeout		cl_xprt->timeout
#define cl_prog			cl_pmap->pm_prog
#define cl_vers			cl_pmap->pm_vers
#define cl_port			cl_pmap->pm_port
#define cl_prot			cl_pmap->pm_prot

/*
 * General RPC program info
 */
#define RPC_MAXVERSION		4
struct rpc_program {
	char *			name;		/* protocol name */
	u32			number;		/* program number */
	unsigned int		nrvers;		/* number of versions */
	struct rpc_version **	version;	/* version array */
	struct rpc_stat *	stats;		/* statistics */
	char *			pipe_dir_name;	/* path to rpc_pipefs dir */
};

struct rpc_version {
	u32			number;		/* version number */
	unsigned int		nrprocs;	/* number of procs */
	struct rpc_procinfo *	procs;		/* procedure array */
};

/*
 * Procedure information
 */
struct rpc_procinfo {
	u32			p_proc;		/* RPC procedure number */
	kxdrproc_t		p_encode;	/* XDR encode function */
	kxdrproc_t		p_decode;	/* XDR decode function */
	unsigned int		p_bufsiz;	/* req. buffer size */
	unsigned int		p_count;	/* call count */
	unsigned int		p_timer;	/* Which RTT timer to use */
};

#define RPC_CONGESTED(clnt)	(RPCXPRT_CONGESTED((clnt)->cl_xprt))
#define RPC_PEERADDR(clnt)	(&(clnt)->cl_xprt->addr)

#ifdef __KERNEL__

struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
				struct rpc_program *info,
				u32 version, rpc_authflavor_t authflavor);
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
int		rpc_shutdown_client(struct rpc_clnt *);
int		rpc_destroy_client(struct rpc_clnt *);
void		rpc_release_client(struct rpc_clnt *);
void		rpc_getport(struct rpc_task *, struct rpc_clnt *);
int		rpc_register(u32, u32, int, unsigned short, int *);

void		rpc_call_setup(struct rpc_task *, struct rpc_message *, int);

int		rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
			       int flags, rpc_action callback, void *clntdata);
int		rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
			      int flags);
void		rpc_restart_call(struct rpc_task *);
void		rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset);
void		rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset);
void		rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
size_t		rpc_max_payload(struct rpc_clnt *);

static __inline__
int rpc_call(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
{
	struct rpc_message msg = {
		.rpc_proc	= &clnt->cl_procinfo[proc],
		.rpc_argp	= argp,
		.rpc_resp	= resp,
		.rpc_cred	= NULL
	};
	return rpc_call_sync(clnt, &msg, flags);
}
		
extern void rpciod_wake_up(void);

/*
 * Helper function for NFSroot support
 */
int		rpc_getport_external(struct sockaddr_in *, __u32, __u32, int);

#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */
OpenPOWER on IntegriCloud