FreeBSD/Linux Kernel Cross Reference
sys/nfsclient/nfsm_subs.h

     /*-
      * Copyright (c) 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * Rick Macklem at The University of Guelph.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
     * $FreeBSD: releng/6.0/sys/nfsclient/nfsm_subs.h 139823 2005-01-07 01:45:51Z imp $
     */
    
    #ifndef _NFSCLIENT_NFSM_SUBS_H_
    #define _NFSCLIENT_NFSM_SUBS_H_
    
    #include <nfs/nfs_common.h>
    
    #define nfsv2tov_type(a)        nv2tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
    
    struct ucred;
    struct vnode;
    
    /*
     * These macros do strange and peculiar things to mbuf chains for
     * the assistance of the nfs code. To attempt to use them for any
     * other purpose will be dangerous. (they make weird assumptions)
     */
    
    /*
     * First define what the actual subs. return
     */
    struct mbuf *nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz);
    struct mbuf *nfsm_rpchead(struct ucred *cr, int nmflag, int procid,
                              int auth_type, int auth_len,
                              struct mbuf *mrest, int mrest_len,
                              struct mbuf **mbp, u_int32_t *xidp);
    
    #define M_HASCL(m)      ((m)->m_flags & M_EXT)
    #define NFSMINOFF(m) \
            do { \
                    if (M_HASCL(m)) \
                            (m)->m_data = (m)->m_ext.ext_buf; \
                    else if ((m)->m_flags & M_PKTHDR) \
                            (m)->m_data = (m)->m_pktdat; \
                    else \
                            (m)->m_data = (m)->m_dat; \
            } while (0)
    #define NFSMSIZ(m)      ((M_HASCL(m))?MCLBYTES: \
                                    (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
    
    /*
     * Now for the macros that do the simple stuff and call the functions
     * for the hard stuff.
     * These macros use several vars. declared in nfsm_reqhead and these
     * vars. must not be used elsewhere unless you are careful not to corrupt
     * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
     * that may be used so long as the value is not expected to retained
     * after a macro.
     * I know, this is kind of dorkey, but it makes the actual op functions
     * fairly clean and deals with the mess caused by the xdr discriminating
     * unions.
     */
    
    
    /* *********************************** */
    /* Request generation phase macros */
    
    int     nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
                caddr_t *bpos);
    void    nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
                caddr_t *bpos);
    int     nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
                caddr_t *bpos);
    
    #define nfsm_bcheck(t1, mreq) \
    do { \
           if (t1) { \
                   error = t1; \
                   m_freem(mreq); \
                   goto nfsmout; \
           } \
   } while (0)
   
   #define nfsm_fhtom(v, v3) \
   do { \
           int32_t t1; \
           t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
           nfsm_bcheck(t1, mreq); \
   } while (0)
   
   /* If full is true, set all fields, otherwise just set mode and time fields */
   #define nfsm_v3attrbuild(a, full) \
           nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
   
   #define nfsm_uiotom(p, s) \
   do { \
           int t1; \
           t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
           nfsm_bcheck(t1, mreq); \
   } while (0)
   
   #define nfsm_strtom(a, s, m) \
   do { \
           int t1; \
           t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
           nfsm_bcheck(t1, mreq); \
   } while (0)
   
   /* *********************************** */
   /* Send the request */
   
   #define nfsm_request(v, t, p, c) \
   do { \
           sigset_t oldset; \
           nfs_set_sigmask(p, &oldset); \
           error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
           nfs_restore_sigmask(p, &oldset); \
           if (error != 0) { \
                   if (error & NFSERR_RETERR) \
                           error &= ~NFSERR_RETERR; \
                   else \
                           goto nfsmout; \
           } \
   } while (0)
   
   #define nfsm_request_mnt(n, t, p, c) \
   do { \
           error = nfs4_request_mnt((n), mreq, (t), (p), (c), &mrep, &md, &dpos); \
           if (error != 0) { \
                   if (error & NFSERR_RETERR) \
                           error &= ~NFSERR_RETERR; \
                   else \
                           goto nfsmout; \
           } \
   } while (0)
   
   /* *********************************** */
   /* Reply interpretation phase macros */
   
   int     nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
               struct mbuf **md, caddr_t *dpos);
   int     nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
               caddr_t *dpos);
   int     nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
               caddr_t *dpos);
   int     nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
               caddr_t *dpos);
   int     nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
               caddr_t *dpos);
   
   #define nfsm_mtofh(d, v, v3, f) \
   do { \
           int32_t t1; \
           t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #define nfsm_getfh(f, s, v3) \
   do { \
           int32_t t1; \
           t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #define nfsm_loadattr(v, a) \
   do { \
           int32_t t1; \
           t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #define nfsm_postop_attr(v, f) \
   do { \
           int32_t t1; \
           t1 = nfsm_postop_attr_xx(&v, &f, &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   /* Used as (f) for nfsm_wcc_data() */
   #define NFSV3_WCCRATTR  0
   #define NFSV3_WCCCHK    1
   
   #define nfsm_wcc_data(v, f) \
   do { \
           int32_t t1; \
           t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #endif

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