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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef DSVCD_DATASTORE_H
#define DSVCD_DATASTORE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <synch.h>
#include <door.h>
#include "container.h"
/*
* Datastore-related data structures, functions and constants. See
* comments in datastore.c for a description of how to use the exported
* functions.
*/
#ifdef __cplusplus
extern "C" {
#endif
#define DSVCD_DS_HASH_SIZE 100
/*
* A linked list of dsvcd_container_t structures. Contains a lock,
* `cl_lock', which is used for controlling manipulation of `cl_head'.
*/
typedef struct {
mutex_t cl_lock; /* protects the list */
dsvcd_container_t *cl_head; /* linked list of containers */
uint8_t cl_pad[8]; /* prevent false sharing */
} dsvcd_container_list_t;
/*
* Describes the underlying datastore itself. There is exactly one
* dsvcd_datastore_t per datastore using doors (so currently, there are
* two: one for `ds_files' and one for `ds_data'). Contains per-datastore
* information, like the door descriptor being used by dsvclockd to listen
* to requests for this datastore, the datastore name, and a list of all
* open containers for this datastore. Instances of this data structure
* are allocated when dsvclockd is started.
*/
typedef struct dsvcd_datastore {
char *ds_name; /* datastore name */
int ds_doorfd; /* datastore door */
/*
* This hash is used to speed up the open() routine so that a given
* container can be located quicker. Hash based on the filename,
* and use it as an index into the array..
*/
dsvcd_container_list_t ds_hash[DSVCD_DS_HASH_SIZE];
} dsvcd_datastore_t;
typedef void dsvcd_svc_t(void *, dsvcd_request_t *, size_t, door_desc_t *,
uint_t);
extern dsvcd_datastore_t *ds_create(const char *, dsvcd_svc_t *);
extern void ds_destroy(dsvcd_datastore_t *);
extern unsigned int ds_reap_containers(dsvcd_datastore_t *, unsigned int);
extern void ds_release_container(dsvcd_datastore_t *, dsvcd_container_t *);
extern dsvcd_container_t *ds_get_container(dsvcd_datastore_t *, const char *,
boolean_t);
#ifdef __cplusplus
}
#endif
#endif /* DSVCD_DATASTORE_H */
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