The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs_common.h

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    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  * 4. 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  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
   33  * $FreeBSD: releng/7.3/sys/nfs/nfs_common.h 148008 2005-07-14 20:08:27Z ps $
   34  */
   35 
   36 
   37 #ifndef _NFS_NFS_COMMON_H_
   38 #define _NFS_NFS_COMMON_H_
   39 
   40 extern enum vtype nv3tov_type[];
   41 extern nfstype nfsv3_type[];
   42 
   43 #define vtonfsv2_mode(t, m) \
   44     txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
   45 
   46 #define nfsv3tov_type(a)        nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
   47 #define vtonfsv3_type(a)        txdr_unsigned(nfsv3_type[((int32_t)(a))])
   48 
   49 int     nfs_adv(struct mbuf **, caddr_t *, int, int);
   50 u_quad_t nfs_curusec(void);
   51 void    *nfsm_disct(struct mbuf **, caddr_t *, int, int, int);
   52 
   53 /* ****************************** */
   54 /* Build request/reply phase macros */
   55 
   56 void    *nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
   57 
   58 #define nfsm_build(c, s) \
   59         (c)nfsm_build_xx((s), &mb, &bpos)
   60 
   61 /* ****************************** */
   62 /* Interpretation phase macros */
   63 
   64 void    *nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
   65 void    *nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos);
   66 int     nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   67 int     nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
   68 
   69 /* Error check helpers */
   70 #define nfsm_dcheck(t1, mrep) \
   71 do { \
   72         if (t1 != 0) { \
   73                 error = t1; \
   74                 m_freem((mrep)); \
   75                 (mrep) = NULL; \
   76                 goto nfsmout; \
   77         } \
   78 } while (0)
   79 
   80 #define nfsm_dcheckp(retp, mrep) \
   81 do { \
   82         if (retp == NULL) { \
   83                 error = EBADRPC; \
   84                 m_freem((mrep)); \
   85                 (mrep) = NULL; \
   86                 goto nfsmout; \
   87         } \
   88 } while (0)
   89                 
   90 #define nfsm_dissect(c, s) \
   91 ({ \
   92         void *ret; \
   93         ret = nfsm_dissect_xx((s), &md, &dpos); \
   94         nfsm_dcheckp(ret, mrep); \
   95         (c)ret; \
   96 })
   97 
   98 #define nfsm_dissect_nonblock(c, s) \
   99 ({ \
  100         void *ret; \
  101         ret = nfsm_dissect_xx_nonblock((s), &md, &dpos); \
  102         nfsm_dcheckp(ret, mrep); \
  103         (c)ret; \
  104 })
  105 
  106 #define nfsm_strsiz(s,m) \
  107 do { \
  108         int t1; \
  109         t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
  110         nfsm_dcheck(t1, mrep); \
  111 } while(0)
  112 
  113 #define nfsm_mtouio(p,s) \
  114 do {\
  115         int32_t t1 = 0; \
  116         if ((s) > 0) \
  117                 t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
  118         nfsm_dcheck(t1, mrep); \
  119 } while (0)
  120 
  121 #define nfsm_rndup(a)   (((a)+3)&(~0x3))
  122 
  123 #define nfsm_adv(s) \
  124 do { \
  125         int t1; \
  126         t1 = nfsm_adv_xx((s), &md, &dpos); \
  127         nfsm_dcheck(t1, mrep); \
  128 } while (0)
  129 
  130 #ifdef __NO_STRICT_ALIGNMENT
  131 #define nfsm_aligned(p, t)      1
  132 #else
  133 #define nfsm_aligned(p, t)      ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
  134 #endif
  135 
  136 #endif

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