2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
6 * This software was developed by Pawel Jakub Dawidek under sponsorship from
7 * the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
36 #include <sys/queue.h>
37 #include <sys/socket.h>
39 #include <arpa/inet.h>
41 #include <netinet/in.h>
48 #include <activemap.h>
55 * 1 - HIO_KEEPALIVE added
56 * 2 - "memsync" and "received" attributes added for memsync mode
58 #define HAST_PROTO_VERSION 2
61 #define EHAST_NOENTRY 1
62 #define EHAST_INVALID 2
63 #define EHAST_NOMEMORY 3
64 #define EHAST_UNIMPLEMENTED 4
66 #define HASTCTL_CMD_UNKNOWN 0
67 #define HASTCTL_CMD_SETROLE 1
68 #define HASTCTL_CMD_STATUS 2
70 #define HAST_ROLE_UNDEF 0
71 #define HAST_ROLE_INIT 1
72 #define HAST_ROLE_PRIMARY 2
73 #define HAST_ROLE_SECONDARY 3
75 #define HAST_SYNCSRC_UNDEF 0
76 #define HAST_SYNCSRC_PRIMARY 1
77 #define HAST_SYNCSRC_SECONDARY 2
84 #define HIO_KEEPALIVE 5
86 #define HAST_USER "hast"
87 #define HAST_TIMEOUT 20
88 #define HAST_CONFIG "/etc/hast.conf"
89 #define HAST_CONTROL "/var/run/hastctl"
90 #define HASTD_LISTEN_TCP4 "tcp4://0.0.0.0:8457"
91 #define HASTD_LISTEN_TCP6 "tcp6://[::]:8457"
92 #define HASTD_PIDFILE "/var/run/hastd.pid"
94 /* Default extent size. */
95 #define HAST_EXTENTSIZE 2097152
96 /* Default maximum number of extents that are kept dirty. */
97 #define HAST_KEEPDIRTY 64
99 #define HAST_ADDRSIZE 1024
100 #define HAST_TOKEN_SIZE 16
102 /* Number of seconds to sleep between reconnect retries or keepalive packets. */
103 #define HAST_KEEPALIVE 10
105 struct hastd_listen {
106 /* Address to listen on. */
107 char hl_addr[HAST_ADDRSIZE];
108 /* Protocol-specific data. */
109 struct proto_conn *hl_conn;
110 TAILQ_ENTRY(hastd_listen) hl_next;
113 struct hastd_config {
114 /* Address to communicate with hastctl(8). */
115 char hc_controladdr[HAST_ADDRSIZE];
116 /* Protocol-specific data. */
117 struct proto_conn *hc_controlconn;
118 /* Incoming control connection. */
119 struct proto_conn *hc_controlin;
121 char hc_pidfile[PATH_MAX];
122 /* List of addresses to listen on. */
123 TAILQ_HEAD(, hastd_listen) hc_listen;
124 /* List of resources. */
125 TAILQ_HEAD(, hast_resource) hc_resources;
128 #define HAST_REPLICATION_FULLSYNC 0
129 #define HAST_REPLICATION_MEMSYNC 1
130 #define HAST_REPLICATION_ASYNC 2
132 #define HAST_COMPRESSION_NONE 0
133 #define HAST_COMPRESSION_HOLE 1
134 #define HAST_COMPRESSION_LZF 2
136 #define HAST_CHECKSUM_NONE 0
137 #define HAST_CHECKSUM_CRC32 1
138 #define HAST_CHECKSUM_SHA256 2
141 * Structure that describes single resource.
143 struct hast_resource {
145 char hr_name[NAME_MAX];
146 /* Negotiated replication mode (HAST_REPLICATION_*). */
148 /* Configured replication mode (HAST_REPLICATION_*). */
149 int hr_original_replication;
150 /* Provider name that will appear in /dev/hast/. */
151 char hr_provname[NAME_MAX];
152 /* Synchronization extent size. */
154 /* Maximum number of extents that are kept dirty. */
156 /* Path to a program to execute on various events. */
157 char hr_exec[PATH_MAX];
158 /* Compression algorithm. */
160 /* Checksum algorithm. */
162 /* Protocol version. */
165 /* Path to local component. */
166 char hr_localpath[PATH_MAX];
167 /* Descriptor to access local component. */
169 /* Offset into local component. */
171 /* Size of usable space. */
173 /* Size of entire local provider. */
174 off_t hr_local_mediasize;
175 /* Sector size of local provider. */
176 unsigned int hr_local_sectorsize;
177 /* Is flushing write cache supported by the local provider? */
179 /* Flush write cache on metadata updates? */
182 /* Descriptor for /dev/ggctl communication. */
184 /* Unit number for ggate communication. */
187 /* Address of the remote component. */
188 char hr_remoteaddr[HAST_ADDRSIZE];
189 /* Local address to bind to for outgoing connections. */
190 char hr_sourceaddr[HAST_ADDRSIZE];
191 /* Connection for incoming data. */
192 struct proto_conn *hr_remotein;
193 /* Connection for outgoing data. */
194 struct proto_conn *hr_remoteout;
195 /* Token to verify both in and out connection are coming from
196 the same node (not necessarily from the same address). */
197 unsigned char hr_token[HAST_TOKEN_SIZE];
198 /* Connection timeout. */
201 /* Resource unique identifier. */
203 /* Primary's local modification count. */
204 uint64_t hr_primary_localcnt;
205 /* Primary's remote modification count. */
206 uint64_t hr_primary_remotecnt;
207 /* Secondary's local modification count. */
208 uint64_t hr_secondary_localcnt;
209 /* Secondary's remote modification count. */
210 uint64_t hr_secondary_remotecnt;
211 /* Synchronization source. */
214 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
216 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
217 int hr_previous_role;
218 /* PID of child worker process. 0 - no child. */
220 /* Control commands from parent to child. */
221 struct proto_conn *hr_ctrl;
222 /* Events from child to parent. */
223 struct proto_conn *hr_event;
224 /* Connection requests from child to parent. */
225 struct proto_conn *hr_conn;
227 /* Activemap structure. */
228 struct activemap *hr_amp;
229 /* Lock used to synchronize access to hr_amp. */
230 pthread_mutex_t hr_amp_lock;
231 /* Lock used to synchronize access to hr_amp diskmap. */
232 pthread_mutex_t hr_amp_diskmap_lock;
234 /* Number of BIO_READ requests. */
235 uint64_t hr_stat_read;
236 /* Number of BIO_WRITE requests. */
237 uint64_t hr_stat_write;
238 /* Number of BIO_DELETE requests. */
239 uint64_t hr_stat_delete;
240 /* Number of BIO_FLUSH requests. */
241 uint64_t hr_stat_flush;
242 /* Number of activemap updates. */
243 uint64_t hr_stat_activemap_update;
244 /* Number of local read errors. */
245 uint64_t hr_stat_read_error;
246 /* Number of local write errors. */
247 uint64_t hr_stat_write_error;
248 /* Number of local delete errors. */
249 uint64_t hr_stat_delete_error;
250 /* Number of flush errors. */
251 uint64_t hr_stat_flush_error;
252 /* Number of activemap write errors. */
253 uint64_t hr_stat_activemap_write_error;
254 /* Number of activemap flush errors. */
255 uint64_t hr_stat_activemap_flush_error;
258 TAILQ_ENTRY(hast_resource) hr_next;
261 struct hastd_config *yy_config_parse(const char *config, bool exitonerror);
262 void yy_config_free(struct hastd_config *config);
264 #endif /* !_HAST_H_ */