52
54
pthread_cond_destroy(&stop_cond);
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];
57
bool Master_info::setPassword(const char *pword)
59
password.assign(pword);
64
const char *Master_info::getPassword()
66
return password.c_str();
69
bool Master_info::setUsername(const char *username)
71
user.assign(username);
76
const char *Master_info::getUsername()
81
bool Master_info::setHost(const char *hostname, uint16_t new_port)
83
host.assign(hostname);
89
const char *Master_info::getHostname()
94
uint16_t Master_info::getPort()
99
off_t Master_info::getLogPosition()
104
bool Master_info::setLogPosition(off_t position)
111
void Master_info::incrementLogPosition(off_t position)
116
const char *Master_info::getLogName()
118
return log_name.c_str();
121
bool Master_info::setLogName(const char *name)
123
log_name.assign(name);
128
uint32_t Master_info::getConnectionRetry()
130
return connect_retry;
133
bool Master_info::setConnectionRetry(uint32_t retry)
135
connect_retry= retry;
141
void Master_info::reset()
148
int Master_info::init_master_info(const char* master_info_fname,
149
const char* slave_info_fname,
99
157
We have to reset read position of relay-log-bin as we may have
110
168
if (thread_mask & SLAVE_SQL)
112
my_b_seek(mi->rli.cur_log, (my_off_t) 0);
170
my_b_seek(rli.cur_log, (my_off_t) 0);
119
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
178
char fname[FN_REFLEN+128];
180
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
181
info_filename.assign(fname);
122
185
We need a mutex while we are changing master info parameters to
123
186
keep other threads from reading bogus info
126
pthread_mutex_lock(&mi->data_lock);
189
pthread_mutex_lock(&data_lock);
129
191
/* does master.info exist ? */
131
if (access(fname,F_OK))
193
if (access(info_filename.c_str(), F_OK))
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);
195
drizzle::MasterList_Record *record;
199
/* Write new Master info file here (from info_filename) */
200
record= list.add_record();
201
record->set_hostname(host);
202
record->set_username(user);
203
record->set_password(password);
204
record->set_port(port);
205
record->set_connect_retry(connect_retry);
206
record->set_log_name(log_name);
207
record->set_log_position(log_pos);
209
fstream output(info_filename.c_str(), ios::out | ios::trunc | ios::binary);
210
if (!list.SerializeToOstream(&output))
160
216
else // file exists
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;
218
/* Read Master info file here (from info_filename) */
219
fstream input(info_filename.c_str(), ios::in | ios::binary);
220
if (!list.ParseFromIstream(&input))
226
/* We do not support multi-master just yet */
227
assert(list.record_size() == 1);
228
const drizzle::MasterList_Record record= list.record(0);
230
if (record.has_username())
231
user= record.username();
232
if (record.has_password())
233
password= record.password();
234
if (record.has_port())
236
if (record.has_connect_retry())
237
connect_retry= record.connect_retry();
238
if (record.has_log_name())
239
log_name= record.log_name();
240
if (record.has_log_position())
241
log_pos= record.log_position();
291
if (init_relay_log_info(&mi->rli, slave_info_fname))
245
if (init_relay_log_info(&rli, slave_info_fname))
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))))
249
if ((error= test(flush())))
298
250
sql_print_error(_("Failed to flush master info file"));
299
pthread_mutex_unlock(&mi->data_lock);
251
pthread_mutex_unlock(&data_lock);
303
sql_print_error(_("Error reading master configuration"));
308
my_close(fd, MYF(0));
309
end_io_cache(&mi->file);
312
pthread_mutex_unlock(&mi->data_lock);
255
pthread_mutex_unlock(&data_lock);
337
277
When we come to this place in code, relay log may or not be initialized;
338
278
the caller is responsible for setting 'flush_relay_log_cache' accordingly.
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));
281
/* Write Master info file here (from info_filename) */
282
assert(info_filename.length());
283
assert(list.record_size() == 1);
284
drizzle::MasterList_Record *record= list.mutable_record(0);
286
record->set_hostname(host);
287
record->set_username(user);
288
record->set_password(password);
289
record->set_port(port);
290
record->set_connect_retry(connect_retry);
291
record->set_log_name(log_name);
292
record->set_log_position(log_pos);
294
fstream output(info_filename.c_str(), ios::out | ios::trunc | ios::binary);
295
if (!list.SerializeToOstream(&output))
376
void end_master_info(Master_info* mi)
305
void Master_info::end_master_info()
380
end_relay_log_info(&mi->rli);
383
end_io_cache(&mi->file);
384
(void)my_close(mi->fd, MYF(MY_WME));
309
end_relay_log_info(&rli);