sys/vfs/nfs/xdr_subs.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Rick Macklem at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)xdr_subs.h  8.3 (Berkeley) 3/30/95
  33  * $FreeBSD: src/sys/nfs/xdr_subs.h,v 1.13 1999/08/28 00:50:04 peter Exp $
  34  * $DragonFly: src/sys/vfs/nfs/xdr_subs.h,v 1.2 2003/06/17 04:28:54 dillon Exp $
  35  */
  36
  37
  38 #ifndef _NFS_XDR_SUBS_H_
  39 #define _NFS_XDR_SUBS_H_
  40
  41 /*
  42  * Macros used for conversion to/from xdr representation by nfs...
  43  * These use the MACHINE DEPENDENT routines ntohl, htonl
  44  * As defined by "XDR: External Data Representation Standard" RFC1014
  45  *
  46  * To simplify the implementation, we use ntohl/htonl even on big-endian
  47  * machines, and count on them being `#define'd away.  Some of these
  48  * might be slightly more efficient as quad_t copies on a big-endian,
  49  * but we cannot count on their alignment anyway.
  50  */
  51
  52 #define fxdr_unsigned(t, v)     ((t)ntohl((int32_t)(v)))
  53 #define txdr_unsigned(v)        (htonl((int32_t)(v)))
  54
  55 #define fxdr_nfsv2time(f, t) \
  56 do { \
  57         (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
  58         if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
  59                 (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
  60         else \
  61                 (t)->tv_nsec = 0; \
  62 } while (0)
  63 #define txdr_nfsv2time(f, t) \
  64 do { \
  65         ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
  66         if ((f)->tv_nsec != -1) \
  67                 ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
  68         else \
  69                 ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
  70 } while (0)
  71
  72 #define fxdr_nfsv3time(f, t) \
  73 do { \
  74         (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
  75         (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
  76 } while (0)
  77 #define txdr_nfsv3time(f, t) \
  78 do { \
  79         ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
  80         ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
  81 } while (0)
  82
  83 #define fxdr_hyper(f) \
  84         ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
  85          (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
  86 #define txdr_hyper(f, t) \
  87 do { \
  88         ((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
  89         ((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
  90 } while (0)
  91
  92 #endif