nfsm_subs.h

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    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  * $FreeBSD$
   35  */
   36 
   37 #ifndef _NFS_NFSM_SUBS_H_
   38 #define _NFS_NFSM_SUBS_H_
   39 
   40 
   41 /*
   42  * These macros do strange and peculiar things to mbuf chains for
   43  * the assistance of the nfs code. To attempt to use them for any
   44  * other purpose will be dangerous. (they make weird assumptions)
   45  */
   46 
   47 #ifndef APPLE
   48 /*
   49  * First define what the actual subs. return
   50  */
   51 #define NFSM_DATAP(m, s)        (m)->m_data += (s)
   52 
   53 /*
   54  * Now for the macros that do the simple stuff and call the functions
   55  * for the hard stuff.
   56  * They use fields in struct nfsrv_descript to handle the mbuf queues.
   57  * Replace most of the macro with an inline function, to minimize
   58  * the machine code. The inline functions in lower case can be called
   59  * directly, bypassing the macro.
   60  */
   61 static __inline void *
   62 nfsm_build(struct nfsrv_descript *nd, int siz)
   63 {
   64         void *retp;
   65         struct mbuf *mb2;
   66 
   67         if (siz > M_TRAILINGSPACE(nd->nd_mb)) {
   68                 NFSMCLGET(mb2, M_NOWAIT);
   69                 if (siz > MLEN)
   70                         panic("build > MLEN");
   71                 mbuf_setlen(mb2, 0);
   72                 nd->nd_bpos = NFSMTOD(mb2, caddr_t);
   73                 nd->nd_mb->m_next = mb2;
   74                 nd->nd_mb = mb2;
   75         }
   76         retp = (void *)(nd->nd_bpos);
   77         nd->nd_mb->m_len += siz;
   78         nd->nd_bpos += siz;
   79         return (retp);
   80 }
   81 
   82 #define NFSM_BUILD(a, c, s)     ((a) = (c)nfsm_build(nd, (s)))
   83 
   84 static __inline void *
   85 nfsm_dissect(struct nfsrv_descript *nd, int siz)
   86 {
   87         int tt1; 
   88         void *retp;
   89 
   90         tt1 = NFSMTOD(nd->nd_md, caddr_t) + nd->nd_md->m_len - nd->nd_dpos; 
   91         if (tt1 >= siz) { 
   92                 retp = (void *)nd->nd_dpos; 
   93                 nd->nd_dpos += siz; 
   94         } else { 
   95                 retp = nfsm_dissct(nd, siz, M_WAITOK); 
   96         }
   97         return (retp);
   98 }
   99 
  100 static __inline void *
  101 nfsm_dissect_nonblock(struct nfsrv_descript *nd, int siz)
  102 {
  103         int tt1; 
  104         void *retp;
  105 
  106         tt1 = NFSMTOD(nd->nd_md, caddr_t) + nd->nd_md->m_len - nd->nd_dpos; 
  107         if (tt1 >= siz) { 
  108                 retp = (void *)nd->nd_dpos; 
  109                 nd->nd_dpos += siz; 
  110         } else { 
  111                 retp = nfsm_dissct(nd, siz, M_NOWAIT); 
  112         }
  113         return (retp);
  114 }
  115 
  116 #define NFSM_DISSECT(a, c, s)                                           \
  117         do {                                                            \
  118                 (a) = (c)nfsm_dissect(nd, (s));                         \
  119                 if ((a) == NULL) {                                      \
  120                         error = EBADRPC;                                \
  121                         goto nfsmout;                                   \
  122                 }                                                       \
  123         } while (0)
  124 
  125 #define NFSM_DISSECT_NONBLOCK(a, c, s)                                  \
  126         do {                                                            \
  127                 (a) = (c)nfsm_dissect_nonblock(nd, (s));                \
  128                 if ((a) == NULL) {                                      \
  129                         error = EBADRPC;                                \
  130                         goto nfsmout;                                   \
  131                 }                                                       \
  132         } while (0)
  133 #endif  /* !APPLE */
  134 
  135 #define NFSM_STRSIZ(s, m)                                               \
  136         do {                                                            \
  137                 tl = (u_int32_t *)nfsm_dissect(nd, NFSX_UNSIGNED);      \
  138                 if (!tl || ((s) = fxdr_unsigned(int32_t, *tl)) > (m)) { \
  139                         error = EBADRPC;                                \
  140                         goto nfsmout;                                   \
  141                 }                                                       \
  142         } while (0)
  143 
  144 #define NFSM_RNDUP(a)   (((a)+3)&(~0x3))
  145 
  146 #endif  /* _NFS_NFSM_SUBS_H_ */

Cache object: 8678c9e633901933e707d9d06aec72bf

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/fs/nfs/nfsm_subs.h

FreeBSD/Linux Kernel Cross Reference
sys/fs/nfs/nfsm_subs.h