xref: /freebsd/sys/nfs/xdr_subs.h (revision 069ac18495ad8fde2748bc94b0f80a50250bb01d)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1989, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Rick Macklem at The University of Guelph.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #ifndef _NFS_XDR_SUBS_H_
36 #define _NFS_XDR_SUBS_H_
37 
38 /*
39  * Macros used for conversion to/from xdr representation by nfs...
40  * These use the MACHINE DEPENDENT routines ntohl, htonl
41  * As defined by "XDR: External Data Representation Standard" RFC1014
42  *
43  * To simplify the implementation, we use ntohl/htonl even on big-endian
44  * machines, and count on them being `#define'd away.  Some of these
45  * might be slightly more efficient as quad_t copies on a big-endian,
46  * but we cannot count on their alignment anyway.
47  */
48 
49 #define	fxdr_unsigned(t, v)	((t)ntohl((int32_t)(v)))
50 #define	txdr_unsigned(v)	(htonl((int32_t)(v)))
51 
52 #define	fxdr_nfsv2time(f, t) \
53 do { \
54 	(t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
55 	if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
56 		(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
57 	else \
58 		(t)->tv_nsec = 0; \
59 } while (0)
60 #define	txdr_nfsv2time(f, t) \
61 do { \
62 	((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
63 	if ((f)->tv_nsec != -1) \
64 		((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
65 	else \
66 		((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
67 } while (0)
68 
69 #define	fxdr_nfsv3time(f, t) \
70 do { \
71 	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
72 	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
73 } while (0)
74 #define	txdr_nfsv3time(f, t) \
75 do { \
76 	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
77 	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
78 } while (0)
79 
80 #define	fxdr_hyper(f) \
81 	((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
82 	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
83 
84 static inline void
85 txdr_hyper(uint64_t f, uint32_t* t)
86 {
87 	t[0] = htonl((u_int32_t)(f >> 32));
88 	t[1] = htonl((u_int32_t)(f & 0xffffffff));
89 }
90 
91 #endif
92