/*
 * 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. 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: src/sys/nfs/nfsrvcache.h,v 1.12 1999/08/28 00:50:03 peter Exp $
 * $DragonFly: src/sys/vfs/nfs/nfsrvcache.h,v 1.2 2003/06/17 04:28:54 dillon Exp $
 */


#ifndef _NFS_NFSRVCACHE_H_
#define _NFS_NFSRVCACHE_H_

#include <sys/queue.h>

/*
 * Definitions for the server recent request cache
 */

#define NFSRVCACHE_MAX_SIZE     (2048)
#define NFSRVCACHE_MIN_SIZE     (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