FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfsrvcache.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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 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.
     *
     *      @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
     * $FreeBSD$
     */
    
    
    #ifndef _NFS_NFSRVCACHE_H_
    #define _NFS_NFSRVCACHE_H_
    
    #include <sys/queue.h>
    
    /*
     * Definitions for the server recent request cache
     */
    
    #define NFSRVCACHESIZ   64
    
    struct nfsrvcache {
            TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
            LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
            u_int32_t rc_xid;                       /* rpc id number */
            union {
                    struct mbuf *ru_repmb;          /* Reply mbuf list OR */
                    int ru_repstat;                 /* Reply status */
            } rc_un;
            union nethostaddr rc_haddr;             /* Host address */
            u_int32_t rc_proc;                      /* rpc proc number */
            u_char  rc_state;               /* Current state of request */
            u_char  rc_flag;                /* Flag bits */
    };
    
    #define rc_reply        rc_un.ru_repmb
    #define rc_status       rc_un.ru_repstat
    #define rc_inetaddr     rc_haddr.had_inetaddr
    #define rc_nam          rc_haddr.had_nam
    
    /* Cache entry states */
    #define RC_UNUSED       0
    #define RC_INPROG       1
    #define RC_DONE         2
    
    /* Return values */
    #define RC_DROPIT       0
    #define RC_REPLY        1
    #define RC_DOIT         2
    #define RC_CHECKIT      3
    
    /* Flag bits */
    #define RC_LOCKED       0x01
    #define RC_WANTED       0x02
    #define RC_REPSTATUS    0x04
    #define RC_REPMBUF      0x08
    #define RC_NQNFS        0x10
    #define RC_INETADDR     0x20
    #define RC_NAM          0x40
    
    #endif

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