1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _NFS4_DRC_H 27 #define _NFS4_DRC_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /* 36 * NFSv4 Duplicate Request cache. 37 */ 38 typedef struct rfs4_drc { 39 kmutex_t lock; 40 uint32_t dr_hash; 41 uint32_t max_size; 42 uint32_t in_use; 43 list_t dr_cache; 44 list_t *dr_buckets; 45 } rfs4_drc_t; 46 47 /* 48 * NFSv4 Duplicate request cache entry. 49 */ 50 typedef struct rfs4_dupreq { 51 list_node_t dr_bkt_next; 52 list_node_t dr_next; 53 list_t *dr_bkt; 54 rfs4_drc_t *drc; 55 int dr_state; 56 timestruc_t dr_time_created; 57 timestruc_t dr_time_used; 58 uint32_t dr_xid; 59 struct netbuf dr_addr; 60 COMPOUND4res dr_res; 61 } rfs4_dupreq_t; 62 63 /* 64 * State of rfs4_dupreq. 65 */ 66 #define NFS4_DUP_ERROR -1 67 #define NFS4_NOT_DUP 0 68 #define NFS4_DUP_NEW 1 69 #define NFS4_DUP_PENDING 2 70 #define NFS4_DUP_FREE 3 71 72 #define NFS4_DUP_REPLAY 4 73 #define NFS4_DUP_INUSE 5 74 75 extern rfs4_drc_t *nfs4_drc; 76 extern unsigned nfs4_drc_lifetime; 77 extern uint32_t nfs4_drc_max; 78 extern uint32_t nfs4_drc_hash; 79 80 rfs4_drc_t *rfs4_init_drc(uint32_t, uint32_t); 81 void rfs4_fini_drc(rfs4_drc_t *); 82 void rfs4_dr_chstate(rfs4_dupreq_t *, int); 83 rfs4_dupreq_t *rfs4_alloc_dr(rfs4_drc_t *); 84 int rfs4_find_dr(struct svc_req *, rfs4_drc_t *, rfs4_dupreq_t **); 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 #endif /* _NFS4_DRC_H */ 91