The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/nfsclient/nfsm_subs.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/10.3/sys/nfsclient/nfsm_subs.h 248198 2013-03-12 12:23:47Z glebius $
   34  */
   35 
   36 #ifndef _NFSCLIENT_NFSM_SUBS_H_
   37 #define _NFSCLIENT_NFSM_SUBS_H_
   38 
   39 #include <nfs/nfs_common.h>
   40 
   41 #define nfsv2tov_type(a)        nv2tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
   42 
   43 struct ucred;
   44 struct vnode;
   45 
   46 /*
   47  * These macros do strange and peculiar things to mbuf chains for
   48  * the assistance of the nfs code. To attempt to use them for any
   49  * other purpose will be dangerous. (they make weird assumptions)
   50  */
   51 
   52 /*
   53  * First define what the actual subs. return
   54  */
   55 u_int32_t nfs_xid_gen(void);
   56 
   57 /* *********************************** */
   58 /* Request generation phase macros */
   59 
   60 int     nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
   61             caddr_t *bpos);
   62 void    nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
   63             caddr_t *bpos);
   64 int     nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
   65             caddr_t *bpos);
   66 
   67 #define nfsm_bcheck(t1, mreq) \
   68 do { \
   69         if (t1) { \
   70                 error = t1; \
   71                 m_freem(mreq); \
   72                 goto nfsmout; \
   73         } \
   74 } while (0)
   75 
   76 #define nfsm_fhtom(v, v3) \
   77 do { \
   78         int32_t t1; \
   79         t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
   80         nfsm_bcheck(t1, mreq); \
   81 } while (0)
   82 
   83 /* If full is true, set all fields, otherwise just set mode and time fields */
   84 #define nfsm_v3attrbuild(a, full) \
   85         nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
   86 
   87 #define nfsm_uiotom(p, s) \
   88 do { \
   89         int t1; \
   90         t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
   91         nfsm_bcheck(t1, mreq); \
   92 } while (0)
   93 
   94 #define nfsm_strtom(a, s, m) \
   95 do { \
   96         int t1; \
   97         t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
   98         nfsm_bcheck(t1, mreq); \
   99 } while (0)
  100 
  101 /* *********************************** */
  102 /* Send the request */
  103 
  104 #define nfsm_request(v, t, p, c) \
  105 do { \
  106         sigset_t oldset; \
  107         nfs_set_sigmask(p, &oldset); \
  108         error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
  109         nfs_restore_sigmask(p, &oldset); \
  110         if (error != 0) { \
  111                 if (error & NFSERR_RETERR) \
  112                         error &= ~NFSERR_RETERR; \
  113                 else \
  114                         goto nfsmout; \
  115         } \
  116 } while (0)
  117 
  118 /* *********************************** */
  119 /* Reply interpretation phase macros */
  120 
  121 int     nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
  122             struct mbuf **md, caddr_t *dpos);
  123 int     nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
  124             caddr_t *dpos);
  125 int     nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
  126             caddr_t *dpos);
  127 int     nfsm_postop_attr_xx(struct vnode **v, int *f, struct vattr *va,
  128             struct mbuf **md, caddr_t *dpos);
  129 int     nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
  130             caddr_t *dpos);
  131 
  132 #define nfsm_mtofh(d, v, v3, f) \
  133 do { \
  134         int32_t t1; \
  135         t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
  136         nfsm_dcheck(t1, mrep); \
  137 } while (0)
  138 
  139 #define nfsm_getfh(f, s, v3) \
  140 do { \
  141         int32_t t1; \
  142         t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
  143         nfsm_dcheck(t1, mrep); \
  144 } while (0)
  145 
  146 #define nfsm_loadattr(v, a) \
  147 do { \
  148         int32_t t1; \
  149         t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
  150         nfsm_dcheck(t1, mrep); \
  151 } while (0)
  152 
  153 #define nfsm_postop_attr(v, f) \
  154 do { \
  155         int32_t t1; \
  156         t1 = nfsm_postop_attr_xx(&v, &f, NULL, &md, &dpos);     \
  157         nfsm_dcheck(t1, mrep); \
  158 } while (0)
  159 
  160 #define nfsm_postop_attr_va(v, f, va)           \
  161 do { \
  162         int32_t t1; \
  163         t1 = nfsm_postop_attr_xx(&v, &f, va, &md, &dpos);       \
  164         nfsm_dcheck(t1, mrep); \
  165 } while (0)
  166 
  167 /* Used as (f) for nfsm_wcc_data() */
  168 #define NFSV3_WCCRATTR  0
  169 #define NFSV3_WCCCHK    1
  170 
  171 #define nfsm_wcc_data(v, f) \
  172 do { \
  173         int32_t t1; \
  174         t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
  175         nfsm_dcheck(t1, mrep); \
  176 } while (0)
  177 
  178 #endif

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