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 * %sccs.include.redist.c% 9 * 10 * @(#)nfsrvcache.h 7.6 (Berkeley) 02/02/93 11 */ 12 13 /* 14 * Definitions for the server recent request cache 15 */ 16 17 #define NFSRVCACHESIZ 256 18 19 struct nfsrvcache { 20 struct nfsrvcache *rc_forw; /* Hash chain links */ 21 struct nfsrvcache **rc_back; /* Hash chain links */ 22 struct nfsrvcache *rc_next; /* Lru list */ 23 struct nfsrvcache **rc_prev; /* Lru list */ 24 u_long rc_xid; /* rpc id number */ 25 time_t rc_timestamp; /* Time stamp */ 26 union { 27 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 28 int ru_repstat; /* Reply status */ 29 } rc_un; 30 union nethostaddr rc_haddr; /* Host address */ 31 short rc_proc; /* rpc proc number */ 32 u_char rc_state; /* Current state of request */ 33 u_char rc_flag; /* Flag bits */ 34 }; 35 36 #define rc_reply rc_un.ru_repmb 37 #define rc_status rc_un.ru_repstat 38 #define rc_inetaddr rc_haddr.had_inetaddr 39 #define rc_nam rc_haddr.had_nam 40 41 /* Cache entry states */ 42 #define RC_UNUSED 0 43 #define RC_INPROG 1 44 #define RC_DONE 2 45 46 /* Return values */ 47 #define RC_DROPIT 0 48 #define RC_REPLY 1 49 #define RC_DOIT 2 50 #define RC_CHECKIT 3 51 52 /* Flag bits */ 53 #define RC_LOCKED 0x01 54 #define RC_WANTED 0x02 55 #define RC_REPSTATUS 0x04 56 #define RC_REPMBUF 0x08 57 #define RC_NQNFS 0x10 58 #define RC_INETADDR 0x20 59 #define RC_NAM 0x40 60 61 /* Delay time after completion that request is dropped */ 62 #define RC_DELAY 2 /* seconds */ 63 64