sys/nfs/nfsrvcache.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Rick Macklem at The University of Guelph.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
  35  */
  36
  37
  38 #ifndef _NFS_NFSRVCACHE_H_
  39 #define _NFS_NFSRVCACHE_H_
  40
  41 /*
  42  * Definitions for the server recent request cache
  43  */
  44
  45 #define NFSRVCACHESIZ   64
  46
  47 struct nfsrvcache {
  48         kcondvar_t rc_cv;
  49         TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
  50         LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
  51         u_int32_t       rc_xid;                         /* rpc id number */
  52         union {
  53                 struct mbuf *ru_repmb;          /* Reply mbuf list OR */
  54                 int ru_repstat;                 /* Reply status */
  55         } rc_un;
  56         union nethostaddr rc_haddr;             /* Host address */
  57         u_int32_t rc_proc;                      /* rpc proc number */
  58         int rc_state;           /* Current state of request */
  59         int rc_gflags;          /* Flag bits */
  60         int rc_flags;           /* Flag bits */
  61 };
  62
  63 #define rc_reply        rc_un.ru_repmb
  64 #define rc_status       rc_un.ru_repstat
  65 #define rc_inetaddr     rc_haddr.had_inetaddr
  66 #define rc_nam          rc_haddr.had_nam
  67
  68 /* Cache entry states */
  69 #define RC_UNUSED       0
  70 #define RC_INPROG       1
  71 #define RC_DONE         2
  72
  73 /* Return values */
  74 #define RC_DROPIT       0
  75 #define RC_REPLY        1
  76 #define RC_DOIT         2
  77 #define RC_CHECKIT      3
  78
  79 /* rc_gflags */
  80 #define RC_G_LOCKED     0x01
  81
  82 /* rc_flags */
  83 #define RC_REPSTATUS    0x04
  84 #define RC_REPMBUF      0x08
  85 #define RC_INETADDR     0x20
  86 #define RC_NAM          0x40
  87
  88 #endif