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 2008 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 uint32_t dr_xid; 57 struct netbuf dr_addr; 58 COMPOUND4res dr_res; 59 } rfs4_dupreq_t; 60 61 /* 62 * State of rfs4_dupreq. 63 */ 64 #define NFS4_DUP_ERROR -1 65 #define NFS4_NOT_DUP 0 66 #define NFS4_DUP_NEW 1 67 #define NFS4_DUP_PENDING 2 68 #define NFS4_DUP_FREE 3 69 70 #define NFS4_DUP_REPLAY 4 71 #define NFS4_DUP_INUSE 5 72 73 extern rfs4_drc_t *nfs4_drc; 74 extern uint32_t nfs4_drc_max; 75 extern uint32_t nfs4_drc_hash; 76 77 rfs4_drc_t *rfs4_init_drc(uint32_t, uint32_t); 78 void rfs4_fini_drc(rfs4_drc_t *); 79 void rfs4_dr_chstate(rfs4_dupreq_t *, int); 80 rfs4_dupreq_t *rfs4_alloc_dr(rfs4_drc_t *); 81 int rfs4_find_dr(struct svc_req *, rfs4_drc_t *, rfs4_dupreq_t **); 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _NFS4_DRC_H */ 88