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/nfsclient/nfsm_subs.h

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    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  *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
   35  * $FreeBSD: releng/12.0/sys/nfsclient/nfsm_subs.h 326023 2017-11-20 19:43:44Z pfg $
   36  */
   37 
   38 #ifndef _NFSCLIENT_NFSM_SUBS_H_
   39 #define _NFSCLIENT_NFSM_SUBS_H_
   40 
   41 #include <nfs/nfs_common.h>
   42 
   43 #define nfsv2tov_type(a)        nv2tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
   44 
   45 struct ucred;
   46 struct vnode;
   47 
   48 /*
   49  * These macros do strange and peculiar things to mbuf chains for
   50  * the assistance of the nfs code. To attempt to use them for any
   51  * other purpose will be dangerous. (they make weird assumptions)
   52  */
   53 
   54 /*
   55  * First define what the actual subs. return
   56  */
   57 u_int32_t nfs_xid_gen(void);
   58 
   59 /* *********************************** */
   60 /* Request generation phase macros */
   61 
   62 int     nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
   63             caddr_t *bpos);
   64 void    nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
   65             caddr_t *bpos);
   66 int     nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
   67             caddr_t *bpos);
   68 
   69 #define nfsm_bcheck(t1, mreq) \
   70 do { \
   71         if (t1) { \
   72                 error = t1; \
   73                 m_freem(mreq); \
   74                 goto nfsmout; \
   75         } \
   76 } while (0)
   77 
   78 #define nfsm_fhtom(v, v3) \
   79 do { \
   80         int32_t t1; \
   81         t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
   82         nfsm_bcheck(t1, mreq); \
   83 } while (0)
   84 
   85 /* If full is true, set all fields, otherwise just set mode and time fields */
   86 #define nfsm_v3attrbuild(a, full) \
   87         nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
   88 
   89 #define nfsm_uiotom(p, s) \
   90 do { \
   91         int t1; \
   92         t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
   93         nfsm_bcheck(t1, mreq); \
   94 } while (0)
   95 
   96 #define nfsm_strtom(a, s, m) \
   97 do { \
   98         int t1; \
   99         t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
  100         nfsm_bcheck(t1, mreq); \
  101 } while (0)
  102 
  103 /* *********************************** */
  104 /* Send the request */
  105 
  106 #define nfsm_request(v, t, p, c) \
  107 do { \
  108         sigset_t oldset; \
  109         nfs_set_sigmask(p, &oldset); \
  110         error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
  111         nfs_restore_sigmask(p, &oldset); \
  112         if (error != 0) { \
  113                 if (error & NFSERR_RETERR) \
  114                         error &= ~NFSERR_RETERR; \
  115                 else \
  116                         goto nfsmout; \
  117         } \
  118 } while (0)
  119 
  120 /* *********************************** */
  121 /* Reply interpretation phase macros */
  122 
  123 int     nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
  124             struct mbuf **md, caddr_t *dpos);
  125 int     nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
  126             caddr_t *dpos);
  127 int     nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
  128             caddr_t *dpos);
  129 int     nfsm_postop_attr_xx(struct vnode **v, int *f, struct vattr *va,
  130             struct mbuf **md, caddr_t *dpos);
  131 int     nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
  132             caddr_t *dpos);
  133 
  134 #define nfsm_mtofh(d, v, v3, f) \
  135 do { \
  136         int32_t t1; \
  137         t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
  138         nfsm_dcheck(t1, mrep); \
  139 } while (0)
  140 
  141 #define nfsm_getfh(f, s, v3) \
  142 do { \
  143         int32_t t1; \
  144         t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
  145         nfsm_dcheck(t1, mrep); \
  146 } while (0)
  147 
  148 #define nfsm_loadattr(v, a) \
  149 do { \
  150         int32_t t1; \
  151         t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
  152         nfsm_dcheck(t1, mrep); \
  153 } while (0)
  154 
  155 #define nfsm_postop_attr(v, f) \
  156 do { \
  157         int32_t t1; \
  158         t1 = nfsm_postop_attr_xx(&v, &f, NULL, &md, &dpos);     \
  159         nfsm_dcheck(t1, mrep); \
  160 } while (0)
  161 
  162 #define nfsm_postop_attr_va(v, f, va)           \
  163 do { \
  164         int32_t t1; \
  165         t1 = nfsm_postop_attr_xx(&v, &f, va, &md, &dpos);       \
  166         nfsm_dcheck(t1, mrep); \
  167 } while (0)
  168 
  169 /* Used as (f) for nfsm_wcc_data() */
  170 #define NFSV3_WCCRATTR  0
  171 #define NFSV3_WCCCHK    1
  172 
  173 #define nfsm_wcc_data(v, f) \
  174 do { \
  175         int32_t t1; \
  176         t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
  177         nfsm_dcheck(t1, mrep); \
  178 } while (0)
  179 
  180 #endif

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