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