projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b688fc87 WJ |
1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Rick Macklem at The University of Guelph. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| 35 | * | |
| 36 | * @(#)nfsrvcache.h 7.3 (Berkeley) 6/28/90 | |
| 37 | */ | |
| 38 | ||
| 39 | /* | |
| 40 | * Definitions for the server recent request cache | |
| 41 | */ | |
| 42 | ||
| 43 | #define NFSRVCACHESIZ 128 | |
| 44 | #define NFSRCHSZ 32 | |
| 45 | ||
| 46 | struct nfsrvcache { | |
| 47 | struct nfsrvcache *rc_chain[2]; /* Hash chain links */ | |
| 48 | struct nfsrvcache *rc_next; /* Lru list */ | |
| 49 | struct nfsrvcache *rc_prev; | |
| 50 | int rc_state; /* Current state of request */ | |
| 51 | int rc_flag; /* Flag bits */ | |
| 52 | struct mbuf rc_nam; /* Sockaddr of requestor */ | |
| 53 | u_long rc_xid; /* rpc id number */ | |
| 54 | int rc_proc; /* rpc proc number */ | |
| 55 | long rc_timestamp; /* Time stamp */ | |
| 56 | union { | |
| 57 | struct mbuf *rc_repmb; /* Reply mbuf list OR */ | |
| 58 | int rc_repstat; /* Reply status */ | |
| 59 | } rc_un; | |
| 60 | }; | |
| 61 | ||
| 62 | #define rc_forw rc_chain[0] | |
| 63 | #define rc_back rc_chain[1] | |
| 64 | #define rc_status rc_un.rc_repstat | |
| 65 | #define rc_reply rc_un.rc_repmb | |
| 66 | ||
| 67 | #define put_at_head(rp) \ | |
| 68 | (rp)->rc_prev->rc_next = (rp)->rc_next; \ | |
| 69 | (rp)->rc_next->rc_prev = (rp)->rc_prev; \ | |
| 70 | (rp)->rc_next = nfsrvcachehead.rc_next; \ | |
| 71 | (rp)->rc_next->rc_prev = (rp); \ | |
| 72 | nfsrvcachehead.rc_next = (rp); \ | |
| 73 | (rp)->rc_prev = &nfsrvcachehead | |
| 74 | ||
| 75 | /* Cache entry states */ | |
| 76 | #define RC_UNUSED 0 | |
| 77 | #define RC_INPROG 1 | |
| 78 | #define RC_DONE 2 | |
| 79 | ||
| 80 | /* Return values */ | |
| 81 | #define RC_DROPIT 0 | |
| 82 | #define RC_REPLY 1 | |
| 83 | #define RC_DOIT 2 | |
| 84 | ||
| 85 | /* Flag bits */ | |
| 86 | #define RC_LOCKED 0x1 | |
| 87 | #define RC_WANTED 0x2 | |
| 88 | #define RC_REPSTATUS 0x4 | |
| 89 | #define RC_REPMBUF 0x8 | |
| 90 | ||
| 91 | /* Delay time after completion that request is dropped */ | |
| 92 | #define RC_DELAY 2 /* seconds */ | |
| 93 |