xref: /freebsd/sys/contrib/openzfs/lib/libspl/include/rpc/xdr.h (revision b670c9bafc0e31c7609969bf374b2e80bdc00211)
1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3  * CDDL HEADER START
4  *
5  * The contents of this file are subject to the terms of the
6  * Common Development and Distribution License, Version 1.0 only
7  * (the "License").  You may not use this file except in compliance
8  * with the License.
9  *
10  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
11  * or https://opensource.org/licenses/CDDL-1.0.
12  * See the License for the specific language governing permissions
13  * and limitations under the License.
14  *
15  * When distributing Covered Code, include this CDDL HEADER in each
16  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
17  * If applicable, add the following below this CDDL HEADER, with the
18  * fields enclosed by brackets "[]" replaced with your own identifying
19  * information: Portions Copyright [yyyy] [name of copyright owner]
20  *
21  * CDDL HEADER END
22  *
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  *
26  *	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
27  *	  All Rights Reserved
28  *
29  * Portions of this source code were derived from Berkeley 4.3 BSD
30  * under license from the Regents of the University of California.
31  */
32 
33 #ifndef LIBSPL_RPC_XDR_H
34 #define	LIBSPL_RPC_XDR_H
35 
36 #include_next <rpc/xdr.h>
37 
38 #ifdef xdr_control /* if e.g. using tirpc */
39 #undef xdr_control
40 #endif
41 
42 #define	XDR_GET_BYTES_AVAIL 1
43 
44 #ifndef HAVE_XDR_BYTESREC
45 struct xdr_bytesrec {
46 	bool_t xc_is_last_record;
47 	size_t xc_num_avail;
48 };
49 #endif
50 typedef struct xdr_bytesrec  xdr_bytesrec_t;
51 
52 /*
53  * This functionality is not required and is disabled in user space.
54  */
55 static inline bool_t
56 xdr_control(XDR *xdrs, int request, void *info)
57 {
58 	xdr_bytesrec_t *xptr;
59 
60 	ASSERT3U(request, ==, XDR_GET_BYTES_AVAIL);
61 
62 	xptr = (xdr_bytesrec_t *)info;
63 	xptr->xc_is_last_record = TRUE;
64 	xptr->xc_num_avail = xdrs->x_handy;
65 
66 	return (TRUE);
67 }
68 
69 #endif /* LIBSPL_RPC_XDR_H */
70