FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs_common.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * 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.
     * 3. 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
     * $FreeBSD$
     */
    
    #ifndef _NFS_NFS_COMMON_H_
    #define _NFS_NFS_COMMON_H_
    
    extern enum vtype nv3tov_type[];
    extern nfstype nfsv3_type[];
    
    #define vtonfsv2_mode(t, m) \
        txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
    
    #define nfsv3tov_type(a)        nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
    #define vtonfsv3_type(a)        txdr_unsigned(nfsv3_type[((int32_t)(a))])
    
    int     nfs_adv(struct mbuf **, caddr_t *, int, int);
    void    *nfsm_disct(struct mbuf **, caddr_t *, int, int, int);
    int     nfs_realign(struct mbuf **, int);
    
    /* ****************************** */
    /* Build request/reply phase macros */
    
    void    *nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
    
    #define nfsm_build(c, s) \
            (c)nfsm_build_xx((s), &mb, &bpos)
    
    /* ****************************** */
    /* Interpretation phase macros */
    
    void    *nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
    void    *nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos);
    int     nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
    int     nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
    
    /* Error check helpers */
    #define nfsm_dcheck(t1, mrep) \
    do { \
            if (t1 != 0) { \
                    error = t1; \
                    m_freem((mrep)); \
                    (mrep) = NULL; \
                    goto nfsmout; \
            } \
    } while (0)
    
    #define nfsm_dcheckp(retp, mrep) \
    do { \
            if (retp == NULL) { \
                    error = EBADRPC; \
                    m_freem((mrep)); \
                    (mrep) = NULL; \
                    goto nfsmout; \
            } \
    } while (0)
    
    #define nfsm_dissect(c, s) \
    ({ \
            void *ret; \
            ret = nfsm_dissect_xx((s), &md, &dpos); \
            nfsm_dcheckp(ret, mrep); \
            (c)ret; \
    })
    
    #define nfsm_dissect_nonblock(c, s) \
   ({ \
           void *ret; \
           ret = nfsm_dissect_xx_nonblock((s), &md, &dpos); \
           nfsm_dcheckp(ret, mrep); \
           (c)ret; \
   })
   
   #define nfsm_strsiz(s,m) \
   do { \
           int t1; \
           t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while(0)
   
   #define nfsm_mtouio(p,s) \
   do {\
           int32_t t1 = 0; \
           if ((s) > 0) \
                   t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #define nfsm_rndup(a)   (((a)+3)&(~0x3))
   
   #define nfsm_adv(s) \
   do { \
           int t1; \
           t1 = nfsm_adv_xx((s), &md, &dpos); \
           nfsm_dcheck(t1, mrep); \
   } while (0)
   
   #ifdef __NO_STRICT_ALIGNMENT
   #define nfsm_aligned(p, t)      1
   #else
   #define nfsm_aligned(p, t)      ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
   #endif
   
   #endif

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