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Annotation of kernel/bsd/nfs/nfsrvcache.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1989, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * This code is derived from software contributed to Berkeley by
        !            31:  * Rick Macklem at The University of Guelph.
        !            32:  *
        !            33:  * Redistribution and use in source and binary forms, with or without
        !            34:  * modification, are permitted provided that the following conditions
        !            35:  * are met:
        !            36:  * 1. Redistributions of source code must retain the above copyright
        !            37:  *    notice, this list of conditions and the following disclaimer.
        !            38:  * 2. Redistributions in binary form must reproduce the above copyright
        !            39:  *    notice, this list of conditions and the following disclaimer in the
        !            40:  *    documentation and/or other materials provided with the distribution.
        !            41:  * 3. All advertising materials mentioning features or use of this software
        !            42:  *    must display the following acknowledgement:
        !            43:  *     This product includes software developed by the University of
        !            44:  *     California, Berkeley and its contributors.
        !            45:  * 4. Neither the name of the University nor the names of its contributors
        !            46:  *    may be used to endorse or promote products derived from this software
        !            47:  *    without specific prior written permission.
        !            48:  *
        !            49:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            50:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            51:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            52:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            53:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            54:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            55:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            56:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            57:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            58:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            59:  * SUCH DAMAGE.
        !            60:  *
        !            61:  *     @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
        !            62:  * FreeBSD-Id: nfsrvcache.h,v 1.9 1997/06/03 17:22:47 dfr Exp $
        !            63:  */
        !            64: 
        !            65: 
        !            66: #ifndef _NFS_NFSRVCACHE_H_
        !            67: #define _NFS_NFSRVCACHE_H_
        !            68: 
        !            69: /*
        !            70:  * Definitions for the server recent request cache
        !            71:  */
        !            72: 
        !            73: #define        NFSRVCACHESIZ   64
        !            74: 
        !            75: struct nfsrvcache {
        !            76:        TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
        !            77:        LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
        !            78:        u_long  rc_xid;                         /* rpc id number */
        !            79:        union {
        !            80:                struct mbuf *ru_repmb;          /* Reply mbuf list OR */
        !            81:                int ru_repstat;                 /* Reply status */
        !            82:        } rc_un;
        !            83:        union nethostaddr rc_haddr;             /* Host address */
        !            84:        u_int32_t rc_proc;                      /* rpc proc number */
        !            85:        u_char  rc_state;               /* Current state of request */
        !            86:        u_char  rc_flag;                /* Flag bits */
        !            87: };
        !            88: 
        !            89: #define        rc_reply        rc_un.ru_repmb
        !            90: #define        rc_status       rc_un.ru_repstat
        !            91: #define        rc_inetaddr     rc_haddr.had_inetaddr
        !            92: #define        rc_nam          rc_haddr.had_nam
        !            93: 
        !            94: /* Cache entry states */
        !            95: #define        RC_UNUSED       0
        !            96: #define        RC_INPROG       1
        !            97: #define        RC_DONE         2
        !            98: 
        !            99: /* Return values */
        !           100: #define        RC_DROPIT       0
        !           101: #define        RC_REPLY        1
        !           102: #define        RC_DOIT         2
        !           103: #define        RC_CHECKIT      3
        !           104: 
        !           105: /* Flag bits */
        !           106: #define        RC_LOCKED       0x01
        !           107: #define        RC_WANTED       0x02
        !           108: #define        RC_REPSTATUS    0x04
        !           109: #define        RC_REPMBUF      0x08
        !           110: #define        RC_NQNFS        0x10
        !           111: #define        RC_INETADDR     0x20
        !           112: #define        RC_NAM          0x40
        !           113: 
        !           114: #endif

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