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/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  * 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  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
   37  * $FreeBSD: releng/5.0/sys/nfs/nfs_common.h 88091 2001-12-18 01:22:09Z iedowse $
   38  */
   39 
   40 
   41 #ifndef _NFS_NFS_COMMON_H_
   42 #define _NFS_NFS_COMMON_H_
   43 
   44 extern enum vtype nv3tov_type[];
   45 extern nfstype nfsv3_type[];
   46 
   47 #define vtonfsv2_mode(t, m) \
   48     txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
   49 
   50 #define nfsv3tov_type(a)        nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
   51 #define vtonfsv3_type(a)        txdr_unsigned(nfsv3_type[((int32_t)(a))])
   52 
   53 int     nfs_adv(struct mbuf **, caddr_t *, int, int);
   54 u_quad_t nfs_curusec(void);
   55 void    *nfsm_disct(struct mbuf **, caddr_t *, int, int);
   56 
   57 /* ****************************** */
   58 /* Build request/reply phase macros */
   59 
   60 void    *nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
   61 
   62 #define nfsm_build(c, s) \
   63         (c)nfsm_build_xx((s), &mb, &bpos)
   64 
   65 /* ****************************** */
   66 /* Interpretation phase macros */
   67 
   68 void    *nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
   69 int     nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   70 int     nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
   71 
   72 /* Error check helpers */
   73 #define nfsm_dcheck(t1, mrep) \
   74 do { \
   75         if (t1 != 0) { \
   76                 error = t1; \
   77                 m_freem((mrep)); \
   78                 (mrep) = NULL; \
   79                 goto nfsmout; \
   80         } \
   81 } while (0)
   82 
   83 #define nfsm_dcheckp(retp, mrep) \
   84 do { \
   85         if (retp == NULL) { \
   86                 error = EBADRPC; \
   87                 m_freem((mrep)); \
   88                 (mrep) = NULL; \
   89                 goto nfsmout; \
   90         } \
   91 } while (0)
   92                 
   93 #define nfsm_dissect(c, s) \
   94 ({ \
   95         void *ret; \
   96         ret = nfsm_dissect_xx((s), &md, &dpos); \
   97         nfsm_dcheckp(ret, mrep); \
   98         (c)ret; \
   99 })
  100 
  101 #define nfsm_strsiz(s,m) \
  102 do { \
  103         int t1; \
  104         t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
  105         nfsm_dcheck(t1, mrep); \
  106 } while(0)
  107 
  108 #define nfsm_mtouio(p,s) \
  109 do {\
  110         int32_t t1 = 0; \
  111         if ((s) > 0) \
  112                 t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
  113         nfsm_dcheck(t1, mrep); \
  114 } while (0)
  115 
  116 #define nfsm_rndup(a)   (((a)+3)&(~0x3))
  117 
  118 #define nfsm_adv(s) \
  119 do { \
  120         int t1; \
  121         t1 = nfsm_adv_xx((s), &md, &dpos); \
  122         nfsm_dcheck(t1, mrep); \
  123 } while (0)
  124 
  125 #endif

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