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
57 #define HAST_PROTO_VERSION 1
60 #define EHAST_NOENTRY 1
61 #define EHAST_INVALID 2
62 #define EHAST_NOMEMORY 3
63 #define EHAST_UNIMPLEMENTED 4
65 #define HASTCTL_CMD_UNKNOWN 0
66 #define HASTCTL_CMD_SETROLE 1
67 #define HASTCTL_CMD_STATUS 2
69 #define HAST_ROLE_UNDEF 0
70 #define HAST_ROLE_INIT 1
71 #define HAST_ROLE_PRIMARY 2
72 #define HAST_ROLE_SECONDARY 3
74 #define HAST_SYNCSRC_UNDEF 0
75 #define HAST_SYNCSRC_PRIMARY 1
76 #define HAST_SYNCSRC_SECONDARY 2
83 #define HIO_KEEPALIVE 5
85 #define HAST_USER "hast"
86 #define HAST_TIMEOUT 20
87 #define HAST_CONFIG "/etc/hast.conf"
88 #define HAST_CONTROL "/var/run/hastctl"
89 #define HASTD_LISTEN_TCP4 "tcp4://0.0.0.0:8457"
90 #define HASTD_LISTEN_TCP6 "tcp6://[::]:8457"
91 #define HASTD_PIDFILE "/var/run/hastd.pid"
93 /* Default extent size. */
94 #define HAST_EXTENTSIZE 2097152
95 /* Default maximum number of extents that are kept dirty. */
96 #define HAST_KEEPDIRTY 64
98 #define HAST_ADDRSIZE 1024
99 #define HAST_TOKEN_SIZE 16
101 /* Number of seconds to sleep between reconnect retries or keepalive packets. */
102 #define HAST_KEEPALIVE 10
104 struct hastd_listen {
105 /* Address to listen on. */
106 char hl_addr[HAST_ADDRSIZE];
107 /* Protocol-specific data. */
108 struct proto_conn *hl_conn;
109 TAILQ_ENTRY(hastd_listen) hl_next;
112 struct hastd_config {
113 /* Address to communicate with hastctl(8). */
114 char hc_controladdr[HAST_ADDRSIZE];
115 /* Protocol-specific data. */
116 struct proto_conn *hc_controlconn;
117 /* Incoming control connection. */
118 struct proto_conn *hc_controlin;
120 char hc_pidfile[PATH_MAX];
121 /* List of addresses to listen on. */
122 TAILQ_HEAD(, hastd_listen) hc_listen;
123 /* List of resources. */
124 TAILQ_HEAD(, hast_resource) hc_resources;
127 #define HAST_REPLICATION_FULLSYNC 0
128 #define HAST_REPLICATION_MEMSYNC 1
129 #define HAST_REPLICATION_ASYNC 2
131 #define HAST_COMPRESSION_NONE 0
132 #define HAST_COMPRESSION_HOLE 1
133 #define HAST_COMPRESSION_LZF 2
135 #define HAST_CHECKSUM_NONE 0
136 #define HAST_CHECKSUM_CRC32 1
137 #define HAST_CHECKSUM_SHA256 2
140 * Structure that describes single resource.
142 struct hast_resource {
144 char hr_name[NAME_MAX];
145 /* Replication mode (HAST_REPLICATION_*). */
147 /* Provider name that will appear in /dev/hast/. */
148 char hr_provname[NAME_MAX];
149 /* Synchronization extent size. */
151 /* Maximum number of extents that are kept dirty. */
153 /* Path to a program to execute on various events. */
154 char hr_exec[PATH_MAX];
155 /* Compression algorithm. */
157 /* Checksum algorithm. */
160 /* Path to local component. */
161 char hr_localpath[PATH_MAX];
162 /* Descriptor to access local component. */
164 /* Offset into local component. */
166 /* Size of usable space. */
168 /* Size of entire local provider. */
169 off_t hr_local_mediasize;
170 /* Sector size of local provider. */
171 unsigned int hr_local_sectorsize;
172 /* Is flushing write cache supported by the local provider? */
174 /* Flush write cache on metadata updates? */
177 /* Descriptor for /dev/ggctl communication. */
179 /* Unit number for ggate communication. */
182 /* Address of the remote component. */
183 char hr_remoteaddr[HAST_ADDRSIZE];
184 /* Local address to bind to for outgoing connections. */
185 char hr_sourceaddr[HAST_ADDRSIZE];
186 /* Connection for incoming data. */
187 struct proto_conn *hr_remotein;
188 /* Connection for outgoing data. */
189 struct proto_conn *hr_remoteout;
190 /* Token to verify both in and out connection are coming from
191 the same node (not necessarily from the same address). */
192 unsigned char hr_token[HAST_TOKEN_SIZE];
193 /* Connection timeout. */
196 /* Resource unique identifier. */
198 /* Primary's local modification count. */
199 uint64_t hr_primary_localcnt;
200 /* Primary's remote modification count. */
201 uint64_t hr_primary_remotecnt;
202 /* Secondary's local modification count. */
203 uint64_t hr_secondary_localcnt;
204 /* Secondary's remote modification count. */
205 uint64_t hr_secondary_remotecnt;
206 /* Synchronization source. */
209 /* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
211 /* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
212 int hr_previous_role;
213 /* PID of child worker process. 0 - no child. */
215 /* Control commands from parent to child. */
216 struct proto_conn *hr_ctrl;
217 /* Events from child to parent. */
218 struct proto_conn *hr_event;
219 /* Connection requests from child to parent. */
220 struct proto_conn *hr_conn;
222 /* Activemap structure. */
223 struct activemap *hr_amp;
224 /* Locked used to synchronize access to hr_amp. */
225 pthread_mutex_t hr_amp_lock;
227 /* Number of BIO_READ requests. */
228 uint64_t hr_stat_read;
229 /* Number of BIO_WRITE requests. */
230 uint64_t hr_stat_write;
231 /* Number of BIO_DELETE requests. */
232 uint64_t hr_stat_delete;
233 /* Number of BIO_FLUSH requests. */
234 uint64_t hr_stat_flush;
235 /* Number of activemap updates. */
236 uint64_t hr_stat_activemap_update;
239 TAILQ_ENTRY(hast_resource) hr_next;
242 struct hastd_config *yy_config_parse(const char *config, bool exitonerror);
243 void yy_config_free(struct hastd_config *config);
245 void yyerror(const char *);
249 #endif /* !_HAST_H_ */