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 8.2 (Berkeley) 08/18/94 11 */ 12 13 /* 14 * Definitions for the server recent request cache 15 */ 16 17 #define NFSRVCACHESIZ 256 18 19 struct nfsrvcache { 20 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ 21 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 22 u_long rc_xid; /* rpc id number */ 23 union { 24 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 25 int ru_repstat; /* Reply status */ 26 } rc_un; 27 union nethostaddr rc_haddr; /* Host address */ 28 short rc_proc; /* rpc proc number */ 29 u_char rc_state; /* Current state of request */ 30 u_char rc_flag; /* Flag bits */ 31 }; 32 33 #define rc_reply rc_un.ru_repmb 34 #define rc_status rc_un.ru_repstat 35 #define rc_inetaddr rc_haddr.had_inetaddr 36 #define rc_nam rc_haddr.had_nam 37 38 /* Cache entry states */ 39 #define RC_UNUSED 0 40 #define RC_INPROG 1 41 #define RC_DONE 2 42 43 /* Return values */ 44 #define RC_DROPIT 0 45 #define RC_REPLY 1 46 #define RC_DOIT 2 47 #define RC_CHECKIT 3 48 49 /* Flag bits */ 50 #define RC_LOCKED 0x01 51 #define RC_WANTED 0x02 52 #define RC_REPSTATUS 0x04 53 #define RC_REPMBUF 0x08 54 #define RC_NQNFS 0x10 55 #define RC_INETADDR 0x20 56 #define RC_NAM 0x40 57