bsd/nfs/nfsrvcache.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  24 /*
  25  * Copyright (c) 1989, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * This code is derived from software contributed to Berkeley by
  29  * Rick Macklem at The University of Guelph.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by the University of
  42  *      California, Berkeley and its contributors.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  *
  59  *      @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
  60  * FreeBSD-Id: nfsrvcache.h,v 1.9 1997/06/03 17:22:47 dfr Exp $
  61  */
  62
  63
  64 #ifndef _NFS_NFSRVCACHE_H_
  65 #define _NFS_NFSRVCACHE_H_
  66
  67 #include <sys/appleapiopts.h>
  68
  69 #ifdef __APPLE_API_PRIVATE
  70 /*
  71  * Definitions for the server recent request cache
  72  */
  73
  74 #define NFSRVCACHESIZ   64
  75
  76 struct nfsrvcache {
  77         TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
  78         LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
  79         u_long  rc_xid;                         /* rpc id number */
  80         union {
  81                 mbuf_t ru_repmb;                /* Reply mbuf list OR */
  82                 int ru_repstat;                 /* Reply status */
  83         } rc_un;
  84         union nethostaddr rc_haddr;             /* Host address */
  85         u_int32_t rc_proc;                      /* rpc proc number */
  86         u_char  rc_state;               /* Current state of request */
  87         u_char  rc_flag;                /* Flag bits */
  88 };
  89
  90 #define rc_reply        rc_un.ru_repmb
  91 #define rc_status       rc_un.ru_repstat
  92 #define rc_inetaddr     rc_haddr.had_inetaddr
  93 #define rc_nam          rc_haddr.had_nam
  94
  95 /* Cache entry states */
  96 #define RC_UNUSED       0
  97 #define RC_INPROG       1
  98 #define RC_DONE         2
  99
 100 /* Return values */
 101 #define RC_DROPIT       0
 102 #define RC_REPLY        1
 103 #define RC_DOIT         2
 104 #define RC_CHECKIT      3
 105
 106 /* Flag bits */
 107 #define RC_LOCKED       0x01
 108 #define RC_WANTED       0x02
 109 #define RC_REPSTATUS    0x04
 110 #define RC_REPMBUF      0x08
 111 #define RC_INETADDR     0x20
 112 #define RC_NAM          0x40
 113
 114 #endif /* __APPLE_API_PRIVATE */
 115 #endif /* _NFS_NFSRVCACHE_H_ */