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 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright 2018 Nexenta Systems, Inc. 29 */ 30 31 #ifndef _NFS4_DRC_H 32 #define _NFS4_DRC_H 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * NFSv4 Duplicate Request cache. 40 */ 41 typedef struct rfs4_drc { 42 kmutex_t lock; 43 uint32_t dr_hash; 44 uint32_t max_size; 45 uint32_t in_use; 46 list_t dr_cache; 47 list_t *dr_buckets; 48 } rfs4_drc_t; 49 50 /* 51 * NFSv4 Duplicate request cache entry. 52 */ 53 typedef struct rfs4_dupreq { 54 list_node_t dr_bkt_next; 55 list_node_t dr_next; 56 list_t *dr_bkt; 57 rfs4_drc_t *drc; 58 int dr_state; 59 uint32_t dr_xid; 60 struct netbuf dr_addr; 61 COMPOUND4res dr_res; 62 } rfs4_dupreq_t; 63 64 /* 65 * State of rfs4_dupreq. 66 */ 67 #define NFS4_DUP_ERROR -1 68 #define NFS4_NOT_DUP 0 69 #define NFS4_DUP_NEW 1 70 #define NFS4_DUP_PENDING 2 71 #define NFS4_DUP_FREE 3 72 73 #define NFS4_DUP_REPLAY 4 74 #define NFS4_DUP_INUSE 5 75 76 extern uint32_t nfs4_drc_max; 77 extern uint32_t nfs4_drc_hash; 78 79 rfs4_drc_t *rfs4_init_drc(uint32_t, uint32_t); 80 void rfs4_fini_drc(void); 81 void rfs4_dr_chstate(rfs4_dupreq_t *, int); 82 rfs4_dupreq_t *rfs4_alloc_dr(rfs4_drc_t *); 83 int rfs4_find_dr(struct svc_req *, rfs4_drc_t *, rfs4_dupreq_t **); 84 85 #ifdef __cplusplus 86 } 87 #endif 88 89 #endif /* _NFS4_DRC_H */ 90