xref: /freebsd/sys/rpc/krpc.h (revision 63a938566d524836885917d95bd491aa4400b181)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 2009, Sun Microsystems, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions are met:
9  * - Redistributions of source code must retain the above copyright notice,
10  *   this list of conditions and the following disclaimer.
11  * - Redistributions in binary form must reproduce the above copyright notice,
12  *   this list of conditions and the following disclaimer in the documentation
13  *   and/or other materials provided with the distribution.
14  * - Neither the name of Sun Microsystems, Inc. nor the names of its
15  *   contributors may be used to endorse or promote products derived
16  *   from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28  * POSSIBILITY OF SUCH DAMAGE.
29  *
30  * $FreeBSD$
31  */
32 
33 #ifndef _RPC_KRPC_H_
34 #define	_RPC_KRPC_H_
35 
36 #ifdef _KERNEL
37 /*
38  * Definitions now shared between client and server RPC for backchannels.
39  */
40 #define MCALL_MSG_SIZE 24
41 
42 void clnt_bck_svccall(void *, struct mbuf *, uint32_t);
43 enum clnt_stat clnt_bck_call(CLIENT *, struct rpc_callextra *, rpcproc_t,
44     struct mbuf *, struct mbuf **, struct timeval, SVCXPRT *);
45 
46 /*
47  * A pending RPC request which awaits a reply. Requests which have
48  * received their reply will have cr_xid set to zero and cr_mrep to
49  * the mbuf chain of the reply.
50  */
51 struct ct_request {
52 	TAILQ_ENTRY(ct_request) cr_link;
53 	uint32_t		cr_xid;		/* XID of request */
54 	struct mbuf		*cr_mrep;	/* reply received by upcall */
55 	int			cr_error;	/* any error from upcall */
56 	char			cr_verf[MAX_AUTH_BYTES]; /* reply verf */
57 };
58 
59 TAILQ_HEAD(ct_request_list, ct_request);
60 
61 struct rc_data {
62 	struct mtx		rc_lock;
63 	struct sockaddr_storage	rc_addr; /* server address */
64 	struct netconfig*	rc_nconf; /* network type */
65 	rpcprog_t		rc_prog;  /* program number */
66 	rpcvers_t		rc_vers;  /* version number */
67 	size_t			rc_sendsz;
68 	size_t			rc_recvsz;
69 	struct timeval		rc_timeout;
70 	struct timeval		rc_retry;
71 	int			rc_retries;
72 	int			rc_privport;
73 	char			*rc_waitchan;
74 	int			rc_intr;
75 	int			rc_connecting;
76 	int			rc_closed;
77 	struct ucred		*rc_ucred;
78 	CLIENT*			rc_client; /* underlying RPC client */
79 	struct rpc_err		rc_err;
80 	void			*rc_backchannel;
81 };
82 
83 struct ct_data {
84 	struct mtx	ct_lock;
85 	int		ct_threads;	/* number of threads in clnt_vc_call */
86 	bool_t		ct_closing;	/* TRUE if we are closing */
87 	bool_t		ct_closed;	/* TRUE if we are closed */
88 	struct socket	*ct_socket;	/* connection socket */
89 	bool_t		ct_closeit;	/* close it on destroy */
90 	struct timeval	ct_wait;	/* wait interval in milliseconds */
91 	struct sockaddr_storage	ct_addr; /* remote addr */
92 	struct rpc_err	ct_error;
93 	uint32_t	ct_xid;
94 	char		ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
95 	size_t		ct_mpos;	/* pos after marshal */
96 	const char	*ct_waitchan;
97 	int		ct_waitflag;
98 	struct mbuf	*ct_record;	/* current reply record */
99 	size_t		ct_record_resid; /* how much left of reply to read */
100 	bool_t		ct_record_eor;	 /* true if reading last fragment */
101 	struct ct_request_list ct_pending;
102 	int		ct_upcallrefs;	/* Ref cnt of upcalls in prog. */
103 	SVCXPRT		*ct_backchannelxprt; /* xprt for backchannel */
104 };
105 
106 struct cf_conn {  /* kept in xprt->xp_p1 for actual connection */
107 	enum xprt_stat strm_stat;
108 	struct mbuf *mpending;	/* unparsed data read from the socket */
109 	struct mbuf *mreq;	/* current record being built from mpending */
110 	uint32_t resid;		/* number of bytes needed for fragment */
111 	bool_t eor;		/* reading last fragment of current record */
112 };
113 
114 #endif	/* _KERNEL */
115 
116 #endif	/* _RPC_KRPC_H_ */
117