FreeBSD/Linux Kernel Cross Reference
sys/nfs/xdr_subs.h
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 * @(#)xdr_subs.h 8.3 (Berkeley) 3/30/95
35 * $FreeBSD$
36 */
37
38
39 #ifndef _NFS_XDR_SUBS_H_
40 #define _NFS_XDR_SUBS_H_
41
42 /*
43 * Macros used for conversion to/from xdr representation by nfs...
44 * These use the MACHINE DEPENDENT routines ntohl, htonl
45 * As defined by "XDR: External Data Representation Standard" RFC1014
46 *
47 * To simplify the implementation, we use ntohl/htonl even on big-endian
48 * machines, and count on them being `#define'd away. Some of these
49 * might be slightly more efficient as quad_t copies on a big-endian,
50 * but we cannot count on their alignment anyway.
51 */
52
53 #define fxdr_unsigned(t, v) ((t)ntohl((int32_t)(v)))
54 #define txdr_unsigned(v) (htonl((int32_t)(v)))
55
56 #define fxdr_nfsv2time(f, t) \
57 do { \
58 (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
59 if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
60 (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
61 else \
62 (t)->tv_nsec = 0; \
63 } while (0)
64 #define txdr_nfsv2time(f, t) \
65 do { \
66 ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
67 if ((f)->tv_nsec != -1) \
68 ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
69 else \
70 ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
71 } while (0)
72
73 #define fxdr_nfsv3time(f, t) \
74 do { \
75 (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
76 (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
77 } while (0)
78 #define txdr_nfsv3time(f, t) \
79 do { \
80 ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
81 ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
82 } while (0)
83
84 #define fxdr_hyper(f) \
85 ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
86 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
87
88 static inline void
89 txdr_hyper(uint64_t f, uint32_t* t)
90 {
91 t[0] = htonl((u_int32_t)(f >> 32));
92 t[1] = htonl((u_int32_t)(f & 0xffffffff));
93 }
94
95 #endif
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