xref: /linux-6.15/include/linux/sunrpc/clnt.h (revision 643d1f7f)
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 <[email protected]>
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 
21 struct rpc_inode;
22 
23 /*
24  * The high-level client handle
25  */
26 struct 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
66 struct 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 
75 struct 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  */
84 struct 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 
98 struct 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 
118 struct rpc_clnt *rpc_create(struct rpc_create_args *args);
119 struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,
120 				struct rpc_program *, u32);
121 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
122 void		rpc_shutdown_client(struct rpc_clnt *);
123 void		rpc_release_client(struct rpc_clnt *);
124 
125 int		rpcb_register(u32, u32, int, unsigned short, int *);
126 int		rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
127 void		rpcb_getport_async(struct rpc_task *);
128 
129 void		rpc_call_start(struct rpc_task *);
130 int		rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg,
131 			       int flags, const struct rpc_call_ops *tk_ops,
132 			       void *calldata);
133 int		rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg,
134 			      int flags);
135 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred,
136 			       int flags);
137 void		rpc_restart_call(struct rpc_task *);
138 void		rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
139 size_t		rpc_max_payload(struct rpc_clnt *);
140 void		rpc_force_rebind(struct rpc_clnt *);
141 size_t		rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
142 const char	*rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
143 
144 #endif /* __KERNEL__ */
145 #endif /* _LINUX_SUNRPC_CLNT_H */
146