xref: /freebsd/sys/fs/nfs/xdr_subs.h (revision 59c8e88e72633afbc47a4ace0d2170d00d51f7dc)
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) do { 					\
53     (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); 	\
54     if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) 		\
55 	(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
56     else 								\
57 	(t)->tv_nsec = 0; 						\
58     } while (0)
59 
60 #define	txdr_nfsv2time(f, t) do { 					\
61     ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); 	\
62     if ((f)->tv_nsec != -1) 						\
63 	((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
64     else 								\
65 	((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; 		\
66     } while (0)
67 
68 #define	fxdr_nfsv3time(f, t) do { 					\
69 	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); 	\
70 	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); 	\
71     } while (0)
72 
73 #define	txdr_nfsv3time(f, t) do { 					\
74 	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); 	\
75 	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); 	\
76     } while (0)
77 
78 #define	fxdr_nfsv4time(f, t) do { 					\
79 	(t)->tv_sec = ntohl(((struct nfsv4_time *)(f))->nfsv4_sec); 	\
80 	(t)->tv_nsec = (ntohl(((struct nfsv4_time *)(f))->nfsv4_nsec) % \
81 		1000000000); 						\
82     } while (0)
83 
84 #define	txdr_nfsv4time(f, t) do { 					\
85 	((struct nfsv4_time *)(t))->nfsv4_highsec = 0; 			\
86 	((struct nfsv4_time *)(t))->nfsv4_sec = htonl((f)->tv_sec); 	\
87 	((struct nfsv4_time *)(t))->nfsv4_nsec = htonl((f)->tv_nsec); 	\
88     } while (0)
89 
90 #define	fxdr_hyper(f) 							\
91         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |		\
92 	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
93 
94 static inline void
95 txdr_hyper(uint64_t f, uint32_t* t)
96 {
97 	t[0] = htonl((u_int32_t)(f >> 32));
98 	t[1] = htonl((u_int32_t)(f & 0xffffffff));
99 }
100 
101 #endif	/* _NFS_XDR_SUBS_H_ */
102