The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/rpc/rpcm_subs.h

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    1 /* $FreeBSD: releng/5.2/sys/rpc/rpcm_subs.h 122698 2003-11-14 20:54:10Z alfred $ */
    2 /*      $OpenBSD: nfsm_subs.h,v 1.11 2000/01/05 20:50:52 millert Exp $  */
    3 /*      $NetBSD: nfsm_subs.h,v 1.10 1996/03/20 21:59:56 fvdl Exp $      */
    4 
    5 /*
    6  * copyright (c) 2003
    7  * the regents of the university of michigan
    8  * all rights reserved
    9  * 
   10  * permission is granted to use, copy, create derivative works and redistribute
   11  * this software and such derivative works for any purpose, so long as the name
   12  * of the university of michigan is not used in any advertising or publicity
   13  * pertaining to the use or distribution of this software without specific,
   14  * written prior authorization.  if the above copyright notice or any other
   15  * identification of the university of michigan is included in any copy of any
   16  * portion of this software, then the disclaimer below must also be included.
   17  * 
   18  * this software is provided as is, without representation from the university
   19  * of michigan as to its fitness for any purpose, and without warranty by the
   20  * university of michigan of any kind, either express or implied, including
   21  * without limitation the implied warranties of merchantability and fitness for
   22  * a particular purpose. the regents of the university of michigan shall not be
   23  * liable for any damages, including special, indirect, incidental, or
   24  * consequential damages, with respect to any claim arising out of or in
   25  * connection with the use of the software, even if it has been or is hereafter
   26  * advised of the possibility of such damages.
   27  */
   28 
   29 /*
   30  * Copyright (c) 1989, 1993
   31  *      The Regents of the University of California.  All rights reserved.
   32  *
   33  * This code is derived from software contributed to Berkeley by
   34  * Rick Macklem at The University of Guelph.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 3. All advertising materials mentioning features or use of this software
   45  *    must display the following acknowledgement:
   46  *      This product includes software developed by the University of
   47  *      California, Berkeley and its contributors.
   48  * 4. Neither the name of the University nor the names of its contributors
   49  *    may be used to endorse or promote products derived from this software
   50  *    without specific prior written permission.
   51  *
   52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   62  * SUCH DAMAGE.
   63  *
   64  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
   65  */
   66 
   67 
   68 #ifndef _RPC_RPCM_SUBS_H_
   69 #define _RPC_RPCM_SUBS_H_
   70 
   71 
   72 /*
   73  * Now for the macros that do the simple stuff and call the functions
   74  * for the hard stuff.
   75  * These macros use several vars. declared in rpcm_reqhead and these
   76  * vars. must not be used elsewhere unless you are careful not to corrupt
   77  * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
   78  * that may be used so long as the value is not expected to retained
   79  * after a macro.
   80  * I know, this is kind of dorkey, but it makes the actual op functions
   81  * fairly clean and deals with the mess caused by the xdr discriminating
   82  * unions.
   83  */
   84 
   85 #define rpcm_build(a,c,s) \
   86                 { if ((s) > M_TRAILINGSPACE(mb)) { \
   87                         MGET(mb2, M_WAIT, MT_DATA); \
   88                         if ((s) > MLEN) \
   89                                 panic("build > MLEN"); \
   90                         mb->m_next = mb2; \
   91                         mb = mb2; \
   92                         mb->m_len = 0; \
   93                         bpos = mtod(mb, caddr_t); \
   94                 } \
   95                 (a) = (c)(bpos); \
   96                 mb->m_len += (s); \
   97                 bpos += (s); }
   98 
   99 #define rpcm_dissect(a, c, s) \
  100                 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
  101                 if (t1 >= (s)) { \
  102                         (a) = (c)(dpos); \
  103                         dpos += (s); \
  104                 } else if ((t1 = rpcm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \
  105                         error = t1; \
  106                         goto rpcmout; \
  107                 } else { \
  108                         (a) = (c)cp2; \
  109                 } }
  110 
  111 #if 0
  112 #define rpcm_mtouio(p,s) \
  113                 if ((s) > 0 && \
  114                    (t1 = rpcm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \
  115                         error = t1; \
  116                         goto rpcmout; \
  117                 }
  118 #endif
  119 
  120 #define rpcm_rndup(a)   (((a)+3)&(~0x3))
  121 
  122 #define rpcm_adv(s) \
  123                 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
  124                 if (t1 >= (s)) { \
  125                         dpos += (s); \
  126                 } else if ((t1 = rpc_adv(&md, &dpos, (s), t1)) != 0) { \
  127                         error = t1; \
  128                         goto rpcmout; \
  129                 } }
  130 
  131 #define RPCMADV(m, s)   (m)->m_data += (s)
  132 
  133 #endif /* _RPC_RPCM_SUBS_H_ */

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