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  * 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  * $FreeBSD$
   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 struct mbuf *nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz);
   57 struct mbuf *nfsm_rpchead(struct ucred *cr, int nmflag, int procid,
   58                           int auth_type, int auth_len,
   59                           struct mbuf *mrest, int mrest_len,
   60                           struct mbuf **mbp, u_int32_t **xidpp);
   61 
   62 #define M_HASCL(m)      ((m)->m_flags & M_EXT)
   63 #define NFSMINOFF(m) \
   64         do { \
   65                 if (M_HASCL(m)) \
   66                         (m)->m_data = (m)->m_ext.ext_buf; \
   67                 else if ((m)->m_flags & M_PKTHDR) \
   68                         (m)->m_data = (m)->m_pktdat; \
   69                 else \
   70                         (m)->m_data = (m)->m_dat; \
   71         } while (0)
   72 #define NFSMSIZ(m)      ((M_HASCL(m))?MCLBYTES: \
   73                                 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
   74 
   75 /*
   76  * Now for the macros that do the simple stuff and call the functions
   77  * for the hard stuff.
   78  * These macros use several vars. declared in nfsm_reqhead and these
   79  * vars. must not be used elsewhere unless you are careful not to corrupt
   80  * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
   81  * that may be used so long as the value is not expected to retained
   82  * after a macro.
   83  * I know, this is kind of dorkey, but it makes the actual op functions
   84  * fairly clean and deals with the mess caused by the xdr discriminating
   85  * unions.
   86  */
   87 
   88 
   89 /* *********************************** */
   90 /* Request generation phase macros */
   91 
   92 int     nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
   93             caddr_t *bpos);
   94 void    nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
   95             caddr_t *bpos);
   96 int     nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
   97             caddr_t *bpos);
   98 
   99 #define nfsm_bcheck(t1, mreq) \
  100 do { \
  101         if (t1) { \
  102                 error = t1; \
  103                 m_freem(mreq); \
  104                 goto nfsmout; \
  105         } \
  106 } while (0)
  107 
  108 #define nfsm_fhtom(v, v3) \
  109 do { \
  110         int32_t t1; \
  111         t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
  112         nfsm_bcheck(t1, mreq); \
  113 } while (0)
  114 
  115 /* If full is true, set all fields, otherwise just set mode and time fields */
  116 #define nfsm_v3attrbuild(a, full) \
  117         nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
  118 
  119 #define nfsm_uiotom(p, s) \
  120 do { \
  121         int t1; \
  122         t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
  123         nfsm_bcheck(t1, mreq); \
  124 } while (0)
  125 
  126 #define nfsm_strtom(a, s, m) \
  127 do { \
  128         int t1; \
  129         t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
  130         nfsm_bcheck(t1, mreq); \
  131 } while (0)
  132 
  133 /* *********************************** */
  134 /* Send the request */
  135 
  136 #define nfsm_request(v, t, p, c) \
  137 do { \
  138         sigset_t oldset; \
  139         nfs_set_sigmask(p, &oldset); \
  140         error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
  141         nfs_restore_sigmask(p, &oldset); \
  142         if (error != 0) { \
  143                 if (error & NFSERR_RETERR) \
  144                         error &= ~NFSERR_RETERR; \
  145                 else \
  146                         goto nfsmout; \
  147         } \
  148 } while (0)
  149 
  150 #define nfsm_request_mnt(n, t, p, c) \
  151 do { \
  152         error = nfs4_request_mnt((n), mreq, (t), (p), (c), &mrep, &md, &dpos); \
  153         if (error != 0) { \
  154                 if (error & NFSERR_RETERR) \
  155                         error &= ~NFSERR_RETERR; \
  156                 else \
  157                         goto nfsmout; \
  158         } \
  159 } while (0)
  160 
  161 /* *********************************** */
  162 /* Reply interpretation phase macros */
  163 
  164 int     nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
  165             struct mbuf **md, caddr_t *dpos);
  166 int     nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
  167             caddr_t *dpos);
  168 int     nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
  169             caddr_t *dpos);
  170 int     nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
  171             caddr_t *dpos);
  172 int     nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
  173             caddr_t *dpos);
  174 
  175 #define nfsm_mtofh(d, v, v3, f) \
  176 do { \
  177         int32_t t1; \
  178         t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
  179         nfsm_dcheck(t1, mrep); \
  180 } while (0)
  181 
  182 #define nfsm_getfh(f, s, v3) \
  183 do { \
  184         int32_t t1; \
  185         t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
  186         nfsm_dcheck(t1, mrep); \
  187 } while (0)
  188 
  189 #define nfsm_loadattr(v, a) \
  190 do { \
  191         int32_t t1; \
  192         t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
  193         nfsm_dcheck(t1, mrep); \
  194 } while (0)
  195 
  196 #define nfsm_postop_attr(v, f) \
  197 do { \
  198         int32_t t1; \
  199         t1 = nfsm_postop_attr_xx(&v, &f, &md, &dpos); \
  200         nfsm_dcheck(t1, mrep); \
  201 } while (0)
  202 
  203 /* Used as (f) for nfsm_wcc_data() */
  204 #define NFSV3_WCCRATTR  0
  205 #define NFSV3_WCCCHK    1
  206 
  207 #define nfsm_wcc_data(v, f) \
  208 do { \
  209         int32_t t1; \
  210         t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
  211         nfsm_dcheck(t1, mrep); \
  212 } while (0)
  213 
  214 #endif

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