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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2018 Nexenta Systems, Inc.
*/
#ifndef _NFS4_DRC_H
#define _NFS4_DRC_H
#ifdef __cplusplus
extern "C" {
#endif
/*
* NFSv4 Duplicate Request cache.
*/
typedef struct rfs4_drc {
kmutex_t lock;
uint32_t dr_hash;
uint32_t max_size;
uint32_t in_use;
list_t dr_cache;
list_t *dr_buckets;
} rfs4_drc_t;
/*
* NFSv4 Duplicate request cache entry.
*/
typedef struct rfs4_dupreq {
list_node_t dr_bkt_next;
list_node_t dr_next;
list_t *dr_bkt;
rfs4_drc_t *drc;
int dr_state;
uint32_t dr_xid;
struct netbuf dr_addr;
COMPOUND4res dr_res;
} rfs4_dupreq_t;
/*
* State of rfs4_dupreq.
*/
#define NFS4_DUP_ERROR -1
#define NFS4_NOT_DUP 0
#define NFS4_DUP_NEW 1
#define NFS4_DUP_PENDING 2
#define NFS4_DUP_FREE 3
#define NFS4_DUP_REPLAY 4
#define NFS4_DUP_INUSE 5
extern uint32_t nfs4_drc_max;
extern uint32_t nfs4_drc_hash;
rfs4_drc_t *rfs4_init_drc(uint32_t, uint32_t);
void rfs4_fini_drc(void);
void rfs4_dr_chstate(rfs4_dupreq_t *, int);
rfs4_dupreq_t *rfs4_alloc_dr(rfs4_drc_t *);
int rfs4_find_dr(struct svc_req *, rfs4_drc_t *, rfs4_dupreq_t **);
#ifdef __cplusplus
}
#endif
#endif /* _NFS4_DRC_H */
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