bsd/nfs/nfsrvcache.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * This code is derived from software contributed to Berkeley by
  28  * Rick Macklem at The University of Guelph.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
  59  * FreeBSD-Id: nfsrvcache.h,v 1.9 1997/06/03 17:22:47 dfr Exp $
  60  */
  61
  62
  63 #ifndef _NFS_NFSRVCACHE_H_
  64 #define _NFS_NFSRVCACHE_H_
  65
  66 /*
  67  * Definitions for the server recent request cache
  68  */
  69
  70 #define NFSRVCACHESIZ   64
  71
  72 struct nfsrvcache {
  73         TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
  74         LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
  75         u_long  rc_xid;                         /* rpc id number */
  76         union {
  77                 struct mbuf *ru_repmb;          /* Reply mbuf list OR */
  78                 int ru_repstat;                 /* Reply status */
  79         } rc_un;
  80         union nethostaddr rc_haddr;             /* Host address */
  81         u_int32_t rc_proc;                      /* rpc proc number */
  82         u_char  rc_state;               /* Current state of request */
  83         u_char  rc_flag;                /* Flag bits */
  84 };
  85
  86 #define rc_reply        rc_un.ru_repmb
  87 #define rc_status       rc_un.ru_repstat
  88 #define rc_inetaddr     rc_haddr.had_inetaddr
  89 #define rc_nam          rc_haddr.had_nam
  90
  91 /* Cache entry states */
  92 #define RC_UNUSED       0
  93 #define RC_INPROG       1
  94 #define RC_DONE         2
  95
  96 /* Return values */
  97 #define RC_DROPIT       0
  98 #define RC_REPLY        1
  99 #define RC_DOIT         2
 100 #define RC_CHECKIT      3
 101
 102 /* Flag bits */
 103 #define RC_LOCKED       0x01
 104 #define RC_WANTED       0x02
 105 #define RC_REPSTATUS    0x04
 106 #define RC_REPMBUF      0x08
 107 #define RC_NQNFS        0x10
 108 #define RC_INETADDR     0x20
 109 #define RC_NAM          0x40
 110
 111 #endif