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  * 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/11.2/sys/nfs/nfs_common.h 331722 2018-03-29 02:50:57Z eadler $
   34  */
   35 
   36 #ifndef _NFS_NFS_COMMON_H_
   37 #define _NFS_NFS_COMMON_H_
   38 
   39 extern enum vtype nv3tov_type[];
   40 extern nfstype nfsv3_type[];
   41 
   42 #define vtonfsv2_mode(t, m) \
   43     txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
   44 
   45 #define nfsv3tov_type(a)        nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
   46 #define vtonfsv3_type(a)        txdr_unsigned(nfsv3_type[((int32_t)(a))])
   47 
   48 int     nfs_adv(struct mbuf **, caddr_t *, int, int);
   49 void    *nfsm_disct(struct mbuf **, caddr_t *, int, int, int);
   50 int     nfs_realign(struct mbuf **, int);
   51 
   52 /* ****************************** */
   53 /* Build request/reply phase macros */
   54 
   55 void    *nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
   56 
   57 #define nfsm_build(c, s) \
   58         (c)nfsm_build_xx((s), &mb, &bpos)
   59 
   60 /* ****************************** */
   61 /* Interpretation phase macros */
   62 
   63 void    *nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
   64 void    *nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos);
   65 int     nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   66 int     nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
   67 
   68 /* Error check helpers */
   69 #define nfsm_dcheck(t1, mrep) \
   70 do { \
   71         if (t1 != 0) { \
   72                 error = t1; \
   73                 m_freem((mrep)); \
   74                 (mrep) = NULL; \
   75                 goto nfsmout; \
   76         } \
   77 } while (0)
   78 
   79 #define nfsm_dcheckp(retp, mrep) \
   80 do { \
   81         if (retp == NULL) { \
   82                 error = EBADRPC; \
   83                 m_freem((mrep)); \
   84                 (mrep) = NULL; \
   85                 goto nfsmout; \
   86         } \
   87 } while (0)
   88 
   89 #define nfsm_dissect(c, s) \
   90 ({ \
   91         void *ret; \
   92         ret = nfsm_dissect_xx((s), &md, &dpos); \
   93         nfsm_dcheckp(ret, mrep); \
   94         (c)ret; \
   95 })
   96 
   97 #define nfsm_dissect_nonblock(c, s) \
   98 ({ \
   99         void *ret; \
  100         ret = nfsm_dissect_xx_nonblock((s), &md, &dpos); \
  101         nfsm_dcheckp(ret, mrep); \
  102         (c)ret; \
  103 })
  104 
  105 #define nfsm_strsiz(s,m) \
  106 do { \
  107         int t1; \
  108         t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
  109         nfsm_dcheck(t1, mrep); \
  110 } while(0)
  111 
  112 #define nfsm_mtouio(p,s) \
  113 do {\
  114         int32_t t1 = 0; \
  115         if ((s) > 0) \
  116                 t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
  117         nfsm_dcheck(t1, mrep); \
  118 } while (0)
  119 
  120 #define nfsm_rndup(a)   (((a)+3)&(~0x3))
  121 
  122 #define nfsm_adv(s) \
  123 do { \
  124         int t1; \
  125         t1 = nfsm_adv_xx((s), &md, &dpos); \
  126         nfsm_dcheck(t1, mrep); \
  127 } while (0)
  128 
  129 #ifdef __NO_STRICT_ALIGNMENT
  130 #define nfsm_aligned(p, t)      1
  131 #else
  132 #define nfsm_aligned(p, t)      ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
  133 #endif
  134 
  135 #endif

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