hast.h revision 219721
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 219721 2011-03-17 21:02:14Z trociny $ 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 16 100 101/* Number of seconds to sleep between reconnect retries or keepalive packets. */ 102#define HAST_KEEPALIVE 10 103 104struct hastd_config { 105 /* Address to communicate with hastctl(8). */ 106 char hc_controladdr[HAST_ADDRSIZE]; 107 /* Protocol-specific data. */ 108 struct proto_conn *hc_controlconn; 109 /* Incoming control connection. */ 110 struct proto_conn *hc_controlin; 111 /* Address to listen on. */ 112 char hc_listenaddr[HAST_ADDRSIZE]; 113 /* Protocol-specific data. */ 114 struct proto_conn *hc_listenconn; 115 /* List of resources. */ 116 TAILQ_HEAD(, hast_resource) hc_resources; 117}; 118 119#define HAST_REPLICATION_FULLSYNC 0 120#define HAST_REPLICATION_MEMSYNC 1 121#define HAST_REPLICATION_ASYNC 2 122 123#define HAST_COMPRESSION_NONE 0 124#define HAST_COMPRESSION_HOLE 1 125#define HAST_COMPRESSION_LZF 2 126 127#define HAST_CHECKSUM_NONE 0 128#define HAST_CHECKSUM_CRC32 1 129#define HAST_CHECKSUM_SHA256 2 130 131/* 132 * Structure that describes single resource. 133 */ 134struct hast_resource { 135 /* Resource name. */ 136 char hr_name[NAME_MAX]; 137 /* Replication mode (HAST_REPLICATION_*). */ 138 int hr_replication; 139 /* Provider name that will appear in /dev/hast/. */ 140 char hr_provname[NAME_MAX]; 141 /* Synchronization extent size. */ 142 int hr_extentsize; 143 /* Maximum number of extents that are kept dirty. */ 144 int hr_keepdirty; 145 /* Path to a program to execute on various events. */ 146 char hr_exec[PATH_MAX]; 147 /* Compression algorithm. */ 148 int hr_compression; 149 /* Checksum algorithm. */ 150 int hr_checksum; 151 152 /* Path to local component. */ 153 char hr_localpath[PATH_MAX]; 154 /* Descriptor to access local component. */ 155 int hr_localfd; 156 /* Offset into local component. */ 157 off_t hr_localoff; 158 /* Size of usable space. */ 159 off_t hr_datasize; 160 /* Size of entire local provider. */ 161 off_t hr_local_mediasize; 162 /* Sector size of local provider. */ 163 unsigned int hr_local_sectorsize; 164 165 /* Descriptor for /dev/ggctl communication. */ 166 int hr_ggatefd; 167 /* Unit number for ggate communication. */ 168 int hr_ggateunit; 169 170 /* Address of the remote component. */ 171 char hr_remoteaddr[HAST_ADDRSIZE]; 172 /* Connection for incoming data. */ 173 struct proto_conn *hr_remotein; 174 /* Connection for outgoing data. */ 175 struct proto_conn *hr_remoteout; 176 /* Token to verify both in and out connection are coming from 177 the same node (not necessarily from the same address). */ 178 unsigned char hr_token[HAST_TOKEN_SIZE]; 179 /* Connection timeout. */ 180 int hr_timeout; 181 182 /* Resource unique identifier. */ 183 uint64_t hr_resuid; 184 /* Primary's local modification count. */ 185 uint64_t hr_primary_localcnt; 186 /* Primary's remote modification count. */ 187 uint64_t hr_primary_remotecnt; 188 /* Secondary's local modification count. */ 189 uint64_t hr_secondary_localcnt; 190 /* Secondary's remote modification count. */ 191 uint64_t hr_secondary_remotecnt; 192 /* Synchronization source. */ 193 uint8_t hr_syncsrc; 194 195 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 196 int hr_role; 197 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 198 int hr_previous_role; 199 /* PID of child worker process. 0 - no child. */ 200 pid_t hr_workerpid; 201 /* Control commands from parent to child. */ 202 struct proto_conn *hr_ctrl; 203 /* Events from child to parent. */ 204 struct proto_conn *hr_event; 205 /* Connection requests from child to parent. */ 206 struct proto_conn *hr_conn; 207 208 /* Activemap structure. */ 209 struct activemap *hr_amp; 210 /* Locked used to synchronize access to hr_amp. */ 211 pthread_mutex_t hr_amp_lock; 212 213 /* Next resource. */ 214 TAILQ_ENTRY(hast_resource) hr_next; 215}; 216 217struct hastd_config *yy_config_parse(const char *config, bool exitonerror); 218void yy_config_free(struct hastd_config *config); 219 220void yyerror(const char *); 221int yylex(void); 222int yyparse(void); 223 224#endif /* !_HAST_H_ */ 225