xref: /freebsd/sys/rpc/krpc.h (revision 13de33a5dc2304b13d595d75d48c51793958474f)
1 /*-
2  * Copyright (c) 2009, Sun Microsystems, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  * - Redistributions of source code must retain the above copyright notice,
8  *   this list of conditions and the following disclaimer.
9  * - Redistributions in binary form must reproduce the above copyright notice,
10  *   this list of conditions and the following disclaimer in the documentation
11  *   and/or other materials provided with the distribution.
12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
13  *   contributors may be used to endorse or promote products derived
14  *   from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #ifndef _RPC_KRPC_H_
32 #define	_RPC_KRPC_H_
33 
34 #ifdef _KERNEL
35 /*
36  * Definitions now shared between client and server RPC for backchannels.
37  */
38 #define MCALL_MSG_SIZE 24
39 
40 /*
41  * A pending RPC request which awaits a reply. Requests which have
42  * received their reply will have cr_xid set to zero and cr_mrep to
43  * the mbuf chain of the reply.
44  */
45 struct ct_request {
46 	TAILQ_ENTRY(ct_request) cr_link;
47 	uint32_t		cr_xid;		/* XID of request */
48 	struct mbuf		*cr_mrep;	/* reply received by upcall */
49 	int			cr_error;	/* any error from upcall */
50 	char			cr_verf[MAX_AUTH_BYTES]; /* reply verf */
51 };
52 
53 TAILQ_HEAD(ct_request_list, ct_request);
54 
55 struct rc_data {
56 	struct mtx		rc_lock;
57 	struct sockaddr_storage	rc_addr; /* server address */
58 	struct netconfig*	rc_nconf; /* network type */
59 	rpcprog_t		rc_prog;  /* program number */
60 	rpcvers_t		rc_vers;  /* version number */
61 	size_t			rc_sendsz;
62 	size_t			rc_recvsz;
63 	struct timeval		rc_timeout;
64 	struct timeval		rc_retry;
65 	int			rc_retries;
66 	int			rc_privport;
67 	char			*rc_waitchan;
68 	int			rc_intr;
69 	int			rc_connecting;
70 	int			rc_closed;
71 	struct ucred		*rc_ucred;
72 	CLIENT*			rc_client; /* underlying RPC client */
73 	struct rpc_err		rc_err;
74 	void			*rc_backchannel;
75 };
76 
77 struct ct_data {
78 	struct mtx	ct_lock;
79 	int		ct_threads;	/* number of threads in clnt_vc_call */
80 	bool_t		ct_closing;	/* TRUE if we are closing */
81 	bool_t		ct_closed;	/* TRUE if we are closed */
82 	struct socket	*ct_socket;	/* connection socket */
83 	bool_t		ct_closeit;	/* close it on destroy */
84 	struct timeval	ct_wait;	/* wait interval in milliseconds */
85 	struct sockaddr_storage	ct_addr; /* remote addr */
86 	struct rpc_err	ct_error;
87 	uint32_t	ct_xid;
88 	char		ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
89 	size_t		ct_mpos;	/* pos after marshal */
90 	const char	*ct_waitchan;
91 	int		ct_waitflag;
92 	struct mbuf	*ct_record;	/* current reply record */
93 	size_t		ct_record_resid; /* how much left of reply to read */
94 	bool_t		ct_record_eor;	 /* true if reading last fragment */
95 	struct ct_request_list ct_pending;
96 	int		ct_upcallrefs;	/* Ref cnt of upcalls in prog. */
97 	SVCXPRT		*ct_backchannelxprt; /* xprt for backchannel */
98 };
99 
100 struct cf_conn {  /* kept in xprt->xp_p1 for actual connection */
101 	enum xprt_stat strm_stat;
102 	struct mbuf *mpending;	/* unparsed data read from the socket */
103 	struct mbuf *mreq;	/* current record being built from mpending */
104 	uint32_t resid;		/* number of bytes needed for fragment */
105 	bool_t eor;		/* reading last fragment of current record */
106 };
107 
108 #endif	/* _KERNEL */
109 
110 #endif	/* _RPC_KRPC_H_ */
111