1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 2000 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef DSVCD_DATASTORE_H 28*0Sstevel@tonic-gate #define DSVCD_DATASTORE_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate #include <synch.h> 34*0Sstevel@tonic-gate #include <door.h> 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate #include "container.h" 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate /* 39*0Sstevel@tonic-gate * Datastore-related data structures, functions and constants. See 40*0Sstevel@tonic-gate * comments in datastore.c for a description of how to use the exported 41*0Sstevel@tonic-gate * functions. 42*0Sstevel@tonic-gate */ 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate #ifdef __cplusplus 45*0Sstevel@tonic-gate extern "C" { 46*0Sstevel@tonic-gate #endif 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #define DSVCD_DS_HASH_SIZE 100 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate /* 51*0Sstevel@tonic-gate * A linked list of dsvcd_container_t structures. Contains a lock, 52*0Sstevel@tonic-gate * `cl_lock', which is used for controlling manipulation of `cl_head'. 53*0Sstevel@tonic-gate */ 54*0Sstevel@tonic-gate typedef struct { 55*0Sstevel@tonic-gate mutex_t cl_lock; /* protects the list */ 56*0Sstevel@tonic-gate dsvcd_container_t *cl_head; /* linked list of containers */ 57*0Sstevel@tonic-gate uint8_t cl_pad[8]; /* prevent false sharing */ 58*0Sstevel@tonic-gate } dsvcd_container_list_t; 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate /* 61*0Sstevel@tonic-gate * Describes the underlying datastore itself. There is exactly one 62*0Sstevel@tonic-gate * dsvcd_datastore_t per datastore using doors (so currently, there are 63*0Sstevel@tonic-gate * two: one for `ds_files' and one for `ds_data'). Contains per-datastore 64*0Sstevel@tonic-gate * information, like the door descriptor being used by dsvclockd to listen 65*0Sstevel@tonic-gate * to requests for this datastore, the datastore name, and a list of all 66*0Sstevel@tonic-gate * open containers for this datastore. Instances of this data structure 67*0Sstevel@tonic-gate * are allocated when dsvclockd is started. 68*0Sstevel@tonic-gate */ 69*0Sstevel@tonic-gate typedef struct dsvcd_datastore { 70*0Sstevel@tonic-gate char *ds_name; /* datastore name */ 71*0Sstevel@tonic-gate int ds_doorfd; /* datastore door */ 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate /* 74*0Sstevel@tonic-gate * This hash is used to speed up the open() routine so that a given 75*0Sstevel@tonic-gate * container can be located quicker. Hash based on the filename, 76*0Sstevel@tonic-gate * and use it as an index into the array.. 77*0Sstevel@tonic-gate */ 78*0Sstevel@tonic-gate dsvcd_container_list_t ds_hash[DSVCD_DS_HASH_SIZE]; 79*0Sstevel@tonic-gate } dsvcd_datastore_t; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate typedef void dsvcd_svc_t(void *, dsvcd_request_t *, size_t, door_desc_t *, 82*0Sstevel@tonic-gate uint_t); 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate extern dsvcd_datastore_t *ds_create(const char *, dsvcd_svc_t *); 85*0Sstevel@tonic-gate extern void ds_destroy(dsvcd_datastore_t *); 86*0Sstevel@tonic-gate extern unsigned int ds_reap_containers(dsvcd_datastore_t *, unsigned int); 87*0Sstevel@tonic-gate extern void ds_release_container(dsvcd_datastore_t *, dsvcd_container_t *); 88*0Sstevel@tonic-gate extern dsvcd_container_t *ds_get_container(dsvcd_datastore_t *, const char *, 89*0Sstevel@tonic-gate boolean_t); 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate #ifdef __cplusplus 92*0Sstevel@tonic-gate } 93*0Sstevel@tonic-gate #endif 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate #endif /* DSVCD_DATASTORE_H */ 96