hast.h revision 207371
1/*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Pawel Jakub Dawidek under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sbin/hastd/hast.h 207371 2010-04-29 15:36:32Z pjd $ 30 */ 31 32#ifndef _HAST_H_ 33#define _HAST_H_ 34 35#include <sys/queue.h> 36#include <sys/socket.h> 37 38#include <arpa/inet.h> 39 40#include <netinet/in.h> 41 42#include <limits.h> 43#include <pthread.h> 44#include <stdbool.h> 45#include <stdint.h> 46 47#include <activemap.h> 48 49#include "proto.h" 50 51#define HAST_PROTO_VERSION 0 52 53#define EHAST_OK 0 54#define EHAST_NOENTRY 1 55#define EHAST_INVALID 2 56#define EHAST_NOMEMORY 3 57#define EHAST_UNIMPLEMENTED 4 58 59#define HASTCTL_CMD_UNKNOWN 0 60#define HASTCTL_CMD_SETROLE 1 61#define HASTCTL_CMD_STATUS 2 62 63#define HAST_ROLE_UNDEF 0 64#define HAST_ROLE_INIT 1 65#define HAST_ROLE_PRIMARY 2 66#define HAST_ROLE_SECONDARY 3 67 68#define HAST_SYNCSRC_UNDEF 0 69#define HAST_SYNCSRC_PRIMARY 1 70#define HAST_SYNCSRC_SECONDARY 2 71 72#define HIO_UNDEF 0 73#define HIO_READ 1 74#define HIO_WRITE 2 75#define HIO_DELETE 3 76#define HIO_FLUSH 4 77 78#define HAST_TIMEOUT 5 79#define HAST_CONFIG "/etc/hast.conf" 80#define HAST_CONTROL "/var/run/hastctl" 81#define HASTD_PORT 8457 82#define HASTD_LISTEN "tcp4://0.0.0.0:8457" 83#define HASTD_PIDFILE "/var/run/hastd.pid" 84 85/* Default extent size. */ 86#define HAST_EXTENTSIZE 2097152 87/* Default maximum number of extents that are kept dirty. */ 88#define HAST_KEEPDIRTY 64 89 90#define HAST_ADDRSIZE 1024 91#define HAST_TOKEN_SIZE 16 92 93struct hastd_config { 94 /* Address to communicate with hastctl(8). */ 95 char hc_controladdr[HAST_ADDRSIZE]; 96 /* Protocol-specific data. */ 97 struct proto_conn *hc_controlconn; 98 /* Address to listen on. */ 99 char hc_listenaddr[HAST_ADDRSIZE]; 100 /* Protocol-specific data. */ 101 struct proto_conn *hc_listenconn; 102 /* List of resources. */ 103 TAILQ_HEAD(, hast_resource) hc_resources; 104}; 105 106#define HAST_REPLICATION_FULLSYNC 0 107#define HAST_REPLICATION_MEMSYNC 1 108#define HAST_REPLICATION_ASYNC 2 109 110/* 111 * Structure that describes single resource. 112 */ 113struct hast_resource { 114 /* Resource name. */ 115 char hr_name[NAME_MAX]; 116 /* Replication mode (HAST_REPLICATION_*). */ 117 int hr_replication; 118 /* Provider name that will appear in /dev/hast/. */ 119 char hr_provname[NAME_MAX]; 120 /* Synchronization extent size. */ 121 int hr_extentsize; 122 /* Maximum number of extents that are kept dirty. */ 123 int hr_keepdirty; 124 125 /* Path to local component. */ 126 char hr_localpath[PATH_MAX]; 127 /* Descriptor to access local component. */ 128 int hr_localfd; 129 /* Offset into local component. */ 130 off_t hr_localoff; 131 /* Size of usable space. */ 132 off_t hr_datasize; 133 /* Size of entire local provider. */ 134 off_t hr_local_mediasize; 135 /* Sector size of local provider. */ 136 unsigned int hr_local_sectorsize; 137 138 /* Descriptor for /dev/ggctl communication. */ 139 int hr_ggatefd; 140 /* Unit number for ggate communication. */ 141 int hr_ggateunit; 142 143 /* Address of the remote component. */ 144 char hr_remoteaddr[HAST_ADDRSIZE]; 145 /* Connection for incoming data. */ 146 struct proto_conn *hr_remotein; 147 /* Connection for outgoing data. */ 148 struct proto_conn *hr_remoteout; 149 /* Token to verify both in and out connection are coming from 150 the same node (not necessarily from the same address). */ 151 unsigned char hr_token[HAST_TOKEN_SIZE]; 152 /* Connection timeout. */ 153 int hr_timeout; 154 155 /* Resource unique identifier. */ 156 uint64_t hr_resuid; 157 /* Primary's local modification count. */ 158 uint64_t hr_primary_localcnt; 159 /* Primary's remote modification count. */ 160 uint64_t hr_primary_remotecnt; 161 /* Secondary's local modification count. */ 162 uint64_t hr_secondary_localcnt; 163 /* Secondary's remote modification count. */ 164 uint64_t hr_secondary_remotecnt; 165 /* Synchronization source. */ 166 uint8_t hr_syncsrc; 167 168 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 169 int hr_role; 170 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 171 int hr_previous_role; 172 /* PID of child worker process. 0 - no child. */ 173 pid_t hr_workerpid; 174 /* Control connection between parent and child. */ 175 struct proto_conn *hr_ctrl; 176 177 /* Activemap structure. */ 178 struct activemap *hr_amp; 179 /* Locked used to synchronize access to hr_amp. */ 180 pthread_mutex_t hr_amp_lock; 181 182 /* Next resource. */ 183 TAILQ_ENTRY(hast_resource) hr_next; 184}; 185 186struct hastd_config *yy_config_parse(const char *config); 187void yy_config_free(struct hastd_config *config); 188 189void yyerror(const char *); 190int yylex(void); 191int yyparse(void); 192 193#endif /* !_HAST_H_ */ 194