1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. 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 8.1 (Berkeley) 06/10/93 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 union { 26 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 27 int ru_repstat; /* Reply status */ 28 } rc_un; 29 union nethostaddr rc_haddr; /* Host address */ 30 short rc_proc; /* rpc proc number */ 31 u_char rc_state; /* Current state of request */ 32 u_char rc_flag; /* Flag bits */ 33 }; 34 35 #define rc_reply rc_un.ru_repmb 36 #define rc_status rc_un.ru_repstat 37 #define rc_inetaddr rc_haddr.had_inetaddr 38 #define rc_nam rc_haddr.had_nam 39 40 /* Cache entry states */ 41 #define RC_UNUSED 0 42 #define RC_INPROG 1 43 #define RC_DONE 2 44 45 /* Return values */ 46 #define RC_DROPIT 0 47 #define RC_REPLY 1 48 #define RC_DOIT 2 49 #define RC_CHECKIT 3 50 51 /* Flag bits */ 52 #define RC_LOCKED 0x01 53 #define RC_WANTED 0x02 54 #define RC_REPSTATUS 0x04 55 #define RC_REPMBUF 0x08 56 #define RC_NQNFS 0x10 57 #define RC_INETADDR 0x20 58 #define RC_NAM 0x40 59