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 * $FreeBSD$ 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 10 103 104 struct 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 */ 134 struct 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 /* Local address to bind to for outgoing connections. */ 173 char hr_sourceaddr[HAST_ADDRSIZE]; 174 /* Connection for incoming data. */ 175 struct proto_conn *hr_remotein; 176 /* Connection for outgoing data. */ 177 struct proto_conn *hr_remoteout; 178 /* Token to verify both in and out connection are coming from 179 the same node (not necessarily from the same address). */ 180 unsigned char hr_token[HAST_TOKEN_SIZE]; 181 /* Connection timeout. */ 182 int hr_timeout; 183 184 /* Resource unique identifier. */ 185 uint64_t hr_resuid; 186 /* Primary's local modification count. */ 187 uint64_t hr_primary_localcnt; 188 /* Primary's remote modification count. */ 189 uint64_t hr_primary_remotecnt; 190 /* Secondary's local modification count. */ 191 uint64_t hr_secondary_localcnt; 192 /* Secondary's remote modification count. */ 193 uint64_t hr_secondary_remotecnt; 194 /* Synchronization source. */ 195 uint8_t hr_syncsrc; 196 197 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 198 int hr_role; 199 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */ 200 int hr_previous_role; 201 /* PID of child worker process. 0 - no child. */ 202 pid_t hr_workerpid; 203 /* Control commands from parent to child. */ 204 struct proto_conn *hr_ctrl; 205 /* Events from child to parent. */ 206 struct proto_conn *hr_event; 207 /* Connection requests from child to parent. */ 208 struct proto_conn *hr_conn; 209 210 /* Activemap structure. */ 211 struct activemap *hr_amp; 212 /* Locked used to synchronize access to hr_amp. */ 213 pthread_mutex_t hr_amp_lock; 214 215 /* Next resource. */ 216 TAILQ_ENTRY(hast_resource) hr_next; 217 }; 218 219 struct hastd_config *yy_config_parse(const char *config, bool exitonerror); 220 void yy_config_free(struct hastd_config *config); 221 222 void yyerror(const char *); 223 int yylex(void); 224 int yyparse(void); 225 226 #endif /* !_HAST_H_ */ 227