hast.h revision 219351
1/*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net> 4 * All rights reserved. 5 * 6 * This software was developed by Pawel Jakub Dawidek under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: head/sbin/hastd/hast.h 219351 2011-03-06 22:56:14Z pjd $ 31 */ 32 33#ifndef _HAST_H_ 34#define _HAST_H_ 35 36#include <sys/queue.h> 37#include <sys/socket.h> 38 39#include <arpa/inet.h> 40 41#include <netinet/in.h> 42 43#include <limits.h> 44#include <pthread.h> 45#include <stdbool.h> 46#include <stdint.h> 47 48#include <activemap.h> 49 50#include "proto.h" 51 52/* 53 * Version history: 54 * 0 - initial version 55 * 1 - HIO_KEEPALIVE added 56 */ 57#define HAST_PROTO_VERSION 1 58 59#define EHAST_OK 0 60#define EHAST_NOENTRY 1 61#define EHAST_INVALID 2 62#define EHAST_NOMEMORY 3 63#define EHAST_UNIMPLEMENTED 4 64 65#define HASTCTL_CMD_UNKNOWN 0 66#define HASTCTL_CMD_SETROLE 1 67#define HASTCTL_CMD_STATUS 2 68 69#define HAST_ROLE_UNDEF 0 70#define HAST_ROLE_INIT 1 71#define HAST_ROLE_PRIMARY 2 72#define HAST_ROLE_SECONDARY 3 73 74#define HAST_SYNCSRC_UNDEF 0 75#define HAST_SYNCSRC_PRIMARY 1 76#define HAST_SYNCSRC_SECONDARY 2 77 78#define HIO_UNDEF 0 79#define HIO_READ 1 80#define HIO_WRITE 2 81#define HIO_DELETE 3 82#define HIO_FLUSH 4 83#define HIO_KEEPALIVE 5 84 85#define HAST_USER "hast" 86#define HAST_TIMEOUT 5 87#define HAST_CONFIG "/etc/hast.conf" 88#define HAST_CONTROL "/var/run/hastctl" 89#define HASTD_PORT 8457 90#define HASTD_LISTEN "tcp4://0.0.0.0:8457" 91#define HASTD_PIDFILE "/var/run/hastd.pid" 92 93/* Default extent size. */ 94#define HAST_EXTENTSIZE 2097152 95/* Default maximum number of extents that are kept dirty. */ 96#define HAST_KEEPDIRTY 64 97 98#define HAST_ADDRSIZE 1024 99#define HAST_TOKEN_SIZE 16 100 101struct hastd_config { 102 /* Address to communicate with hastctl(8). */ 103 char hc_controladdr[HAST_ADDRSIZE]; 104 /* Protocol-specific data. */ 105 struct proto_conn *hc_controlconn; 106 /* Incoming control connection. */ 107 struct proto_conn *hc_controlin; 108 /* Address to listen on. */ 109 char hc_listenaddr[HAST_ADDRSIZE]; 110 /* Protocol-specific data. */ 111 struct proto_conn *hc_listenconn; 112 /* List of resources. */ 113 TAILQ_HEAD(, hast_resource) hc_resources; 114}; 115 116#define HAST_REPLICATION_FULLSYNC 0 117#define HAST_REPLICATION_MEMSYNC 1 118#define HAST_REPLICATION_ASYNC 2 119 120#define HAST_CHECKSUM_NONE 0 121#define HAST_CHECKSUM_CRC32 1 122#define HAST_CHECKSUM_SHA256 2 123 124/* 125 * Structure that describes single resource. 126 */ 127struct hast_resource { 128 /* Resource name. */ 129 char hr_name[NAME_MAX]; 130 /* Replication mode (HAST_REPLICATION_*). */ 131 int hr_replication; 132 /* Provider name that will appear in /dev/hast/. */ 133 char hr_provname[NAME_MAX]; 134 /* Synchronization extent size. */ 135 int hr_extentsize; 136 /* Maximum number of extents that are kept dirty. */ 137 int hr_keepdirty; 138 /* Path to a program to execute on various events. */ 139 char hr_exec[PATH_MAX]; 140 /* Checksum algorithm. */ 141 int hr_checksum; 142 143 /* Path to local component. */ 144 char hr_localpath[PATH_MAX]; 145 /* Descriptor to access local component. */ 146 int hr_localfd; 147 /* Offset into local component. */ 148 off_t hr_localoff; 149 /* Size of usable space. */ 150 off_t hr_datasize; 151 /* Size of entire local provider. */ 152 off_t hr_local_mediasize; 153 /* Sector size of local provider. */ 154 unsigned int hr_local_sectorsize; 155 156 /* Descriptor for /dev/ggctl communication. */ 157 int hr_ggatefd; 158 /* Unit number for ggate communication. */ 159 int hr_ggateunit; 160 161 /* Address of the remote component. */ 162 char hr_remoteaddr[HAST_ADDRSIZE]; 163 /* Connection for incoming data. */ 164 struct proto_conn *hr_remotein; 165 /* Connection for outgoing data. */ 166 struct proto_conn *hr_remoteout; 167 /* Token to verify both in and out connection are coming from 168 the same node (not necessarily from the same address). */ 169 unsigned char hr_token[HAST_TOKEN_SIZE]; 170 /* Connection timeout. */ 171 int hr_timeout; 172 173 /* Resource unique identifier. */ 174 uint64_t hr_resuid; 175 /* Primary's local modification count. */ 176 uint64_t hr_primary_localcnt; 177 /* Primary's remote modification count. */ 178 uint64_t hr_primary_remotecnt; 179 /* Secondary's local modification count. */ 180 uint64_t hr_secondary_localcnt; 181 /* Secondary's remote modification count. */ 182 uint64_t hr_secondary_remotecnt; 183 /* Synchronization source. */ 184 uint8_t hr_syncsrc; 185 186 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 187 int hr_role; 188 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 189 int hr_previous_role; 190 /* PID of child worker process. 0 - no child. */ 191 pid_t hr_workerpid; 192 /* Control commands from parent to child. */ 193 struct proto_conn *hr_ctrl; 194 /* Events from child to parent. */ 195 struct proto_conn *hr_event; 196 /* Connection requests from child to parent. */ 197 struct proto_conn *hr_conn; 198 199 /* Activemap structure. */ 200 struct activemap *hr_amp; 201 /* Locked used to synchronize access to hr_amp. */ 202 pthread_mutex_t hr_amp_lock; 203 204 /* Next resource. */ 205 TAILQ_ENTRY(hast_resource) hr_next; 206}; 207 208struct hastd_config *yy_config_parse(const char *config, bool exitonerror); 209void yy_config_free(struct hastd_config *config); 210 211void yyerror(const char *); 212int yylex(void); 213int yyparse(void); 214 215#endif /* !_HAST_H_ */ 216