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FreeBSD/Linux Kernel Cross Reference
sys/nfsserver/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: stable/8/sys/nfsserver/nfsm_subs.h 199583 2009-11-20 15:27:52Z jhb $
   34  */
   35 
   36 #ifndef _NFSSERVER_NFSM_SUBS_H_
   37 #define _NFSSERVER_NFSM_SUBS_H_
   38 
   39 #include <nfs/nfs_common.h>
   40 
   41 #define nfstov_mode(a)  (fxdr_unsigned(u_int32_t, (a)) & ALLPERMS)
   42 
   43 /*
   44  * These macros do strange and peculiar things to mbuf chains for
   45  * the assistance of the nfs code. To attempt to use them for any
   46  * other purpose will be dangerous. (they make weird assumptions)
   47  */
   48 
   49 /*
   50  * First define what the actual subs. return
   51  */
   52 
   53 #define M_HASCL(m)      ((m)->m_flags & M_EXT)
   54 #define NFSMSIZ(m)      ((M_HASCL(m))?MCLBYTES: \
   55                                 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
   56 
   57 /*
   58  * Now for the macros that do the simple stuff and call the functions
   59  * for the hard stuff.
   60  * These macros use several vars. declared in nfsm_reqhead and these
   61  * vars. must not be used elsewhere unless you are careful not to corrupt
   62  * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
   63  * that may be used so long as the value is not expected to retained
   64  * after a macro.
   65  * I know, this is kind of dorkey, but it makes the actual op functions
   66  * fairly clean and deals with the mess caused by the xdr discriminating
   67  * unions.
   68  */
   69 
   70 
   71 
   72 /* ************************************* */
   73 /* Dissection phase macros */
   74 
   75 int     nfsm_srvstrsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   76 int     nfsm_srvnamesiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   77 int     nfsm_srvnamesiz0_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
   78 int     nfsm_srvmtofh_xx(fhandle_t *f, int v3, struct mbuf **md, caddr_t *dpos);
   79 int     nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos);
   80 
   81 #define nfsm_srvstrsiz(s, m) \
   82 do { \
   83         int t1; \
   84         t1 = nfsm_srvstrsiz_xx(&(s), (m), &md, &dpos); \
   85         if (t1) { \
   86                 error = t1; \
   87                 nfsm_reply(0); \
   88         } \
   89 } while (0)
   90 
   91 #define nfsm_srvnamesiz(s) \
   92 do { \
   93         int t1; \
   94         t1 = nfsm_srvnamesiz_xx(&(s), NFS_MAXNAMLEN, &md, &dpos); \
   95         if (t1) { \
   96                 error = t1; \
   97                 nfsm_reply(0); \
   98         } \
   99 } while (0)
  100 
  101 #define nfsm_srvpathsiz(s) \
  102 do { \
  103         int t1; \
  104         t1 = nfsm_srvnamesiz0_xx(&(s), NFS_MAXPATHLEN, &md, &dpos); \
  105         if (t1) { \
  106                 error = t1; \
  107                 nfsm_reply(0); \
  108         } \
  109 } while (0)
  110 
  111 #define nfsm_srvmtofh(f) \
  112 do { \
  113         int t1; \
  114         t1 = nfsm_srvmtofh_xx((f), nfsd->nd_flag & ND_NFSV3, &md, &dpos); \
  115         if (t1) { \
  116                 error = t1; \
  117                 nfsm_reply(0); \
  118         } \
  119 } while (0)
  120 
  121 /* XXX why is this different? */
  122 #define nfsm_srvsattr(a) \
  123 do { \
  124         int t1; \
  125         t1 = nfsm_srvsattr_xx((a), &md, &dpos); \
  126         if (t1) { \
  127                 error = t1; \
  128                 m_freem(mrep); \
  129                 mrep = NULL; \
  130                 goto nfsmout; \
  131         } \
  132 } while (0)
  133 
  134 /* ************************************* */
  135 /* Prepare the reply */
  136 
  137 #define nfsm_reply(s) \
  138 do { \
  139         if (mrep != NULL) { \
  140                 m_freem(mrep); \
  141                 mrep = NULL; \
  142         } \
  143         mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
  144         *mrq = mreq; \
  145         if (error == EBADRPC) { \
  146                 error = 0; \
  147                 goto nfsmout; \
  148         } \
  149 } while (0)
  150 
  151 #define nfsm_writereply(s) \
  152 do { \
  153         mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
  154 } while(0)
  155 
  156 /* ************************************* */
  157 /* Reply phase macros - add additional reply info */
  158 
  159 void    nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb,
  160             caddr_t *bpos);
  161 void    nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos);
  162 void    nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
  163             char **bp, char **be, caddr_t bpos);
  164 
  165 #define nfsm_srvfhtom(f, v3) \
  166         nfsm_srvfhtom_xx((f), (v3), &mb, &bpos)
  167 
  168 #define nfsm_srvpostop_fh(f) \
  169         nfsm_srvpostop_fh_xx((f), &mb, &bpos)
  170 
  171 #define nfsm_srvwcc_data(br, b, ar, a) \
  172         nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
  173 
  174 #define nfsm_srvpostop_attr(r, a) \
  175         nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
  176 
  177 #define nfsm_srvfillattr(a, f) \
  178         nfsm_srvfattr(nfsd, (a), (f))
  179 
  180 #define nfsm_clget \
  181         nfsm_clget_xx(&tl, mb, &mp, &bp, &be, bpos)
  182 
  183 #endif

Cache object: de71c7c8839e12128e5d8352dc0321c9


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