55
52
pthread_cond_destroy(&stop_cond);
58
bool Master_info::setPassword(const char *pword)
60
password.assign(pword);
65
const char *Master_info::getPassword()
67
return password.c_str();
70
bool Master_info::setUsername(const char *username)
72
user.assign(username);
77
const char *Master_info::getUsername()
82
bool Master_info::setHost(const char *hostname, uint16_t new_port)
84
host.assign(hostname);
90
const char *Master_info::getHostname()
95
uint16_t Master_info::getPort()
100
off_t Master_info::getLogPosition()
105
bool Master_info::setLogPosition(off_t position)
112
void Master_info::incrementLogPosition(off_t position)
117
const char *Master_info::getLogName()
119
return log_name.c_str();
122
bool Master_info::setLogName(const char *name)
124
log_name.assign(name);
129
uint32_t Master_info::getConnectionRetry()
131
return connect_retry;
134
bool Master_info::setConnectionRetry(uint32_t retry)
136
connect_retry= retry;
142
void Master_info::reset()
149
int Master_info::init_master_info(const char* master_info_fname,
150
const char* slave_info_fname,
56
void init_master_log_pos(Master_info* mi)
58
mi->master_log_name[0] = 0;
59
mi->master_log_pos = BIN_LOG_HEADER_SIZE; // skip magic number
61
always request heartbeat unless master_heartbeat_period is set
62
explicitly zero. Here is the default value for heartbeat period
63
if CHANGE MASTER did not specify it. (no data loss in conversion
64
as hb period has a max)
66
mi->heartbeat_period= (float) cmin((double)SLAVE_MAX_HEARTBEAT_PERIOD,
67
(slave_net_timeout/2.0));
68
assert(mi->heartbeat_period > (float) 0.001
69
|| mi->heartbeat_period == 0);
75
LINES_IN_MASTER_INFO_WITH_SSL= 14,
77
/* 5.1.16 added value of master_ssl_verify_server_cert */
78
LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT= 15,
80
/* 6.0 added value of master_heartbeat_period */
81
LINE_FOR_MASTER_HEARTBEAT_PERIOD= 16,
83
/* Number of lines currently used when saving master info file */
84
LINES_IN_MASTER_INFO= LINE_FOR_MASTER_HEARTBEAT_PERIOD
88
int init_master_info(Master_info* mi, const char* master_info_fname,
89
const char* slave_info_fname,
90
bool abort_if_no_master_info_file,
94
char fname[FN_REFLEN+128];
158
99
We have to reset read position of relay-log-bin as we may have
169
110
if (thread_mask & SLAVE_SQL)
171
my_b_seek(rli.cur_log, (my_off_t) 0);
112
my_b_seek(mi->rli.cur_log, (my_off_t) 0);
179
char fname[FN_REFLEN+128];
181
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
182
info_filename.assign(fname);
119
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
186
122
We need a mutex while we are changing master info parameters to
187
123
keep other threads from reading bogus info
190
pthread_mutex_lock(&data_lock);
126
pthread_mutex_lock(&mi->data_lock);
192
129
/* does master.info exist ? */
194
if (access(info_filename.c_str(), F_OK))
131
if (access(fname,F_OK))
196
drizzle::MasterList_Record *record;
200
/* Write new Master info file here (from info_filename) */
201
record= list.add_record();
202
record->set_hostname(host);
203
record->set_username(user);
204
record->set_password(password);
205
record->set_port(port);
206
record->set_connect_retry(connect_retry);
207
record->set_log_name(log_name);
208
record->set_log_position(log_pos);
210
fstream output(info_filename.c_str(), ios::out | ios::trunc | ios::binary);
211
if (!list.SerializeToOstream(&output))
133
if (abort_if_no_master_info_file)
135
pthread_mutex_unlock(&mi->data_lock);
139
if someone removed the file from underneath our feet, just close
140
the old descriptor and re-create the old file
143
my_close(fd, MYF(MY_WME));
144
if ((fd = my_open(fname, O_CREAT|O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
146
sql_print_error(_("Failed to create a new master info file (file '%s', errno %d)"), fname, my_errno);
149
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,0,
152
sql_print_error(_("Failed to create a cache on master info file (file '%s')"), fname);
157
init_master_log_pos(mi);
217
160
else // file exists
219
/* Read Master info file here (from info_filename) */
220
fstream input(info_filename.c_str(), ios::in | ios::binary);
221
if (!list.ParseFromIstream(&input))
227
/* We do not support multi-master just yet */
228
assert(list.record_size() == 1);
229
const drizzle::MasterList_Record record= list.record(0);
231
if (record.has_username())
232
user= record.username();
233
if (record.has_password())
234
password= record.password();
235
if (record.has_port())
237
if (record.has_connect_retry())
238
connect_retry= record.connect_retry();
239
if (record.has_log_name())
240
log_name= record.log_name();
241
if (record.has_log_position())
242
log_pos= record.log_position();
163
reinit_io_cache(&mi->file, READ_CACHE, 0L,0,0);
166
if ((fd = my_open(fname, O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
168
sql_print_error(_("Failed to open the existing master info file (file '%s', errno %d)"), fname, my_errno);
171
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,
174
sql_print_error(_("Failed to create a cache on master info file (file '%s')"), fname);
180
int port, connect_retry, master_log_pos, lines;
181
int ssl= 0, ssl_verify_server_cert= 0;
182
float master_heartbeat_period= 0.0;
183
char *first_non_digit;
186
Starting from 4.1.x master.info has new format. Now its
187
first line contains number of lines in file. By reading this
188
number we will be always distinguish to which version our
189
master.info corresponds to. We can't simply count lines in
190
file since versions before 4.1.x could generate files with more
192
If first line doesn't contain a number or contain number less than
193
LINES_IN_MASTER_INFO_WITH_SSL then such file is treated like file
194
from pre 4.1.1 version.
195
There is no ambiguity when reading an old master.info, as before
196
4.1.1, the first line contained the binlog's name, which is either
197
empty or has an extension (contains a '.'), so can't be confused
200
So we're just reading first line and trying to figure which version
205
The first row is temporarily stored in mi->master_log_name,
206
if it is line count and not binlog name (new format) it will be
207
overwritten by the second row later.
209
if (init_strvar_from_file(mi->master_log_name,
210
sizeof(mi->master_log_name), &mi->file,
214
lines= strtoul(mi->master_log_name, &first_non_digit, 10);
216
if (mi->master_log_name[0]!='\0' &&
217
*first_non_digit=='\0' && lines >= LINES_IN_MASTER_INFO_WITH_SSL)
219
/* Seems to be new format => read master log name from next line */
220
if (init_strvar_from_file(mi->master_log_name,
221
sizeof(mi->master_log_name), &mi->file, ""))
227
if (init_intvar_from_file(&master_log_pos, &mi->file, 4) ||
228
init_strvar_from_file(mi->host, sizeof(mi->host), &mi->file, 0) ||
229
init_strvar_from_file(mi->user, sizeof(mi->user), &mi->file, "test") ||
230
init_strvar_from_file(mi->password, SCRAMBLED_PASSWORD_CHAR_LENGTH+1,
232
init_intvar_from_file(&port, &mi->file, DRIZZLE_PORT) ||
233
init_intvar_from_file(&connect_retry, &mi->file, DEFAULT_CONNECT_RETRY))
237
If file has ssl part use it even if we have server without
238
SSL support. But these option will be ignored later when
239
slave will try connect to master, so in this case warning
242
if (lines >= LINES_IN_MASTER_INFO_WITH_SSL)
244
if (init_intvar_from_file(&ssl, &mi->file, 0) ||
245
init_strvar_from_file(mi->ssl_ca, sizeof(mi->ssl_ca),
247
init_strvar_from_file(mi->ssl_capath, sizeof(mi->ssl_capath),
249
init_strvar_from_file(mi->ssl_cert, sizeof(mi->ssl_cert),
251
init_strvar_from_file(mi->ssl_cipher, sizeof(mi->ssl_cipher),
253
init_strvar_from_file(mi->ssl_key, sizeof(mi->ssl_key),
258
Starting from 5.1.16 ssl_verify_server_cert might be
261
if (lines >= LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT &&
262
init_intvar_from_file(&ssl_verify_server_cert, &mi->file, 0))
265
Starting from 6.0 master_heartbeat_period might be
268
if (lines >= LINE_FOR_MASTER_HEARTBEAT_PERIOD &&
269
init_floatvar_from_file(&master_heartbeat_period, &mi->file, 0.0))
274
sql_print_warning(_("SSL information in the master info file "
275
"('%s') are ignored because this MySQL slave was "
276
"compiled without SSL support."), fname);
279
This has to be handled here as init_intvar_from_file can't handle
282
mi->master_log_pos= (my_off_t) master_log_pos;
283
mi->port= (uint) port;
284
mi->connect_retry= (uint) connect_retry;
286
mi->ssl_verify_server_cert= ssl_verify_server_cert;
287
mi->heartbeat_period= master_heartbeat_period;
246
if (init_relay_log_info(&rli, slave_info_fname))
291
if (init_relay_log_info(&mi->rli, slave_info_fname))
250
if ((error= test(flush())))
295
// now change cache READ -> WRITE - must do this before flush_master_info
296
reinit_io_cache(&mi->file, WRITE_CACHE, 0L, 0, 1);
297
if ((error=test(flush_master_info(mi, 1))))
251
298
sql_print_error(_("Failed to flush master info file"));
252
pthread_mutex_unlock(&data_lock);
299
pthread_mutex_unlock(&mi->data_lock);
303
sql_print_error(_("Error reading master configuration"));
256
pthread_mutex_unlock(&data_lock);
308
my_close(fd, MYF(0));
309
end_io_cache(&mi->file);
312
pthread_mutex_unlock(&mi->data_lock);
278
337
When we come to this place in code, relay log may or not be initialized;
279
338
the caller is responsible for setting 'flush_relay_log_cache' accordingly.
282
/* Write Master info file here (from info_filename) */
283
assert(info_filename.length());
284
assert(list.record_size() == 1);
285
drizzle::MasterList_Record *record= list.mutable_record(0);
287
record->set_hostname(host);
288
record->set_username(user);
289
record->set_password(password);
290
record->set_port(port);
291
record->set_connect_retry(connect_retry);
292
record->set_log_name(log_name);
293
record->set_log_position(log_pos);
295
fstream output(info_filename.c_str(), ios::out | ios::trunc | ios::binary);
296
if (!list.SerializeToOstream(&output))
340
if (flush_relay_log_cache &&
341
flush_io_cache(mi->rli.relay_log.get_log_file()))
345
We flushed the relay log BEFORE the master.info file, because if we crash
346
now, we will get a duplicate event in the relay log at restart. If we
347
flushed in the other order, we would get a hole in the relay log.
348
And duplicate is better than hole (with a duplicate, in later versions we
349
can add detection and scrap one event; with a hole there's nothing we can
354
In certain cases this code may create master.info files that seems
355
corrupted, because of extra lines filled with garbage in the end
356
file (this happens if new contents take less space than previous
357
contents of file). But because of number of lines in the first line
358
of file we don't care about this garbage.
360
char heartbeat_buf[sizeof(mi->heartbeat_period) * 4]; // buffer to suffice always
361
sprintf(heartbeat_buf, "%.3f", mi->heartbeat_period);
364
"%u\n%s\n%s\n%s\n%s\n%s\n%d\n%d\n%d\n%s\n%s\n%s\n%s\n%s\n%d\n%s\n",
365
LINES_IN_MASTER_INFO,
366
mi->master_log_name, llstr(mi->master_log_pos, lbuf),
368
mi->password, mi->port, mi->connect_retry,
369
(int)(mi->ssl), mi->ssl_ca, mi->ssl_capath, mi->ssl_cert,
370
mi->ssl_cipher, mi->ssl_key, mi->ssl_verify_server_cert,
372
return(-flush_io_cache(file));
306
void Master_info::end_master_info()
376
void end_master_info(Master_info* mi)
310
end_relay_log_info(&rli);
380
end_relay_log_info(&mi->rli);
383
end_io_cache(&mi->file);
384
(void)my_close(mi->fd, MYF(MY_WME));