usr/src/sys/nfs/nfsrvcache.h

/*
 * 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.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)nfsrvcache.h        8.3 (Berkeley) %G%
 */


#ifndef _NFS_NFSRVCACHE_H_
#define _NFS_NFSRVCACHE_H_

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

#define NFSRVCACHESIZ   64

struct nfsrvcache {
        TAILQ_ENTRY(nfsrvcache) rc_lru;         /* LRU chain */
        LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
        u_long  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 */
        short   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