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