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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: src/sys/nfsserver/nfsm_subs.h,v 1.37.6.1 2007/02/14 22:30:33 cperciva Exp $
   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, struct nfsrv_descript *nfsd,
   79             struct mbuf **md, caddr_t *dpos);
   80 int     nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos);
   81 
   82 #define nfsm_srvstrsiz(s, m) \
   83 do { \
   84         int t1; \
   85         t1 = nfsm_srvstrsiz_xx(&(s), (m), &md, &dpos); \
   86         if (t1) { \
   87                 error = t1; \
   88                 nfsm_reply(0); \
   89         } \
   90 } while (0)
   91 
   92 #define nfsm_srvnamesiz(s) \
   93 do { \
   94         int t1; \
   95         t1 = nfsm_srvnamesiz_xx(&(s), NFS_MAXNAMLEN, &md, &dpos); \
   96         if (t1) { \
   97                 error = t1; \
   98                 nfsm_reply(0); \
   99         } \
  100 } while (0)
  101 
  102 #define nfsm_srvpathsiz(s) \
  103 do { \
  104         int t1; \
  105         t1 = nfsm_srvnamesiz0_xx(&(s), NFS_MAXPATHLEN, &md, &dpos); \
  106         if (t1) { \
  107                 error = t1; \
  108                 nfsm_reply(0); \
  109         } \
  110 } while (0)
  111 
  112 #define nfsm_srvmtofh(f) \
  113 do { \
  114         int t1; \
  115         t1 = nfsm_srvmtofh_xx((f), nfsd, &md, &dpos); \
  116         if (t1) { \
  117                 error = t1; \
  118                 nfsm_reply(0); \
  119         } \
  120 } while (0)
  121 
  122 /* XXX why is this different? */
  123 #define nfsm_srvsattr(a) \
  124 do { \
  125         int t1; \
  126         t1 = nfsm_srvsattr_xx((a), &md, &dpos); \
  127         if (t1) { \
  128                 error = t1; \
  129                 m_freem(mrep); \
  130                 mrep = NULL; \
  131                 goto nfsmout; \
  132         } \
  133 } while (0)
  134 
  135 /* ************************************* */
  136 /* Prepare the reply */
  137 
  138 #define nfsm_reply(s) \
  139 do { \
  140         if (mrep != NULL) { \
  141                 m_freem(mrep); \
  142                 mrep = NULL; \
  143         } \
  144         mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
  145         *mrq = mreq; \
  146         if (error == EBADRPC) { \
  147                 error = 0; \
  148                 goto nfsmout; \
  149         } \
  150 } while (0)
  151 
  152 #define nfsm_writereply(s) \
  153 do { \
  154         mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
  155 } while(0)
  156 
  157 /* ************************************* */
  158 /* Reply phase macros - add additional reply info */
  159 
  160 void    nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb,
  161             caddr_t *bpos);
  162 void    nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos);
  163 void    nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
  164             char **bp, char **be, caddr_t bpos, int droplock);
  165 
  166 #define nfsm_srvfhtom(f, v3) \
  167         nfsm_srvfhtom_xx((f), (v3), &mb, &bpos)
  168 
  169 #define nfsm_srvpostop_fh(f) \
  170         nfsm_srvpostop_fh_xx((f), &mb, &bpos)
  171 
  172 #define nfsm_srvwcc_data(br, b, ar, a) \
  173         nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
  174 
  175 #define nfsm_srvpostop_attr(r, a) \
  176         nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
  177 
  178 #define nfsm_srvfillattr(a, f) \
  179         nfsm_srvfattr(nfsd, (a), (f))
  180 
  181 #define nfsm_clget \
  182         nfsm_clget_xx(&tl, mb, &mp, &bp, &be, bpos, 1)
  183 
  184 #define nfsm_clget_nolock \
  185         nfsm_clget_xx(&tl, mb, &mp, &bp, &be, bpos, 0)
  186 
  187 #endif

Cache object: 3c90d18bcc817965f4c320641b312810


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