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Annotation of sys/nfs/nfsrvcache.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: nfsrvcache.h,v 1.6 2003/06/02 23:28:20 millert Exp $  */
                      2: /*     $NetBSD: nfsrvcache.h,v 1.10 1996/02/18 11:54:08 fvdl Exp $     */
                      3:
                      4: /*
                      5:  * Copyright (c) 1989, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Rick Macklem at The University of Guelph.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  *
                     35:  *     @(#)nfsrvcache.h        8.3 (Berkeley) 3/30/95
                     36:  */
                     37:
                     38:
                     39: #ifndef _NFS_NFSRVCACHE_H_
                     40: #define _NFS_NFSRVCACHE_H_
                     41:
                     42: /*
                     43:  * Definitions for the server recent request cache
                     44:  */
                     45:
                     46: #define        NFSRVCACHESIZ   64
                     47:
                     48: struct nfsrvcache {
                     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_int16_t rc_proc;                      /* rpc proc number */
                     58:        u_char    rc_state;             /* Current state of request */
                     59:        u_char    rc_flag;              /* Flag bits */
                     60: };
                     61:
                     62: #define        rc_reply        rc_un.ru_repmb
                     63: #define        rc_status       rc_un.ru_repstat
                     64: #define        rc_inetaddr     rc_haddr.had_inetaddr
                     65: #define        rc_nam          rc_haddr.had_nam
                     66:
                     67: /* Cache entry states */
                     68: #define        RC_UNUSED       0
                     69: #define        RC_INPROG       1
                     70: #define        RC_DONE         2
                     71:
                     72: /* Return values */
                     73: #define        RC_DROPIT       0
                     74: #define        RC_REPLY        1
                     75: #define        RC_DOIT         2
                     76: #define        RC_CHECKIT      3
                     77:
                     78: /* Flag bits */
                     79: #define        RC_LOCKED       0x01
                     80: #define        RC_WANTED       0x02
                     81: #define        RC_REPSTATUS    0x04
                     82: #define        RC_REPMBUF      0x08
                     83: #define        RC_INETADDR     0x20
                     84: #define        RC_NAM          0x40
                     85:
                     86: #endif