54
57
pthread_cond_destroy(&stop_cond);
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,
61
void init_master_log_pos(Master_info* mi)
63
mi->master_log_name[0] = 0;
64
mi->master_log_pos = BIN_LOG_HEADER_SIZE; // skip magic number
66
always request heartbeat unless master_heartbeat_period is set
67
explicitly zero. Here is the default value for heartbeat period
68
if CHANGE MASTER did not specify it. (no data loss in conversion
69
as hb period has a max)
71
mi->heartbeat_period= (float) min(SLAVE_MAX_HEARTBEAT_PERIOD,
72
(slave_net_timeout/2.0));
73
assert(mi->heartbeat_period > (float) 0.001
74
|| mi->heartbeat_period == 0);
80
LINES_IN_MASTER_INFO_WITH_SSL= 14,
82
/* 5.1.16 added value of master_ssl_verify_server_cert */
83
LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT= 15,
85
/* 6.0 added value of master_heartbeat_period */
86
LINE_FOR_MASTER_HEARTBEAT_PERIOD= 16,
88
/* Number of lines currently used when saving master info file */
89
LINES_IN_MASTER_INFO= LINE_FOR_MASTER_HEARTBEAT_PERIOD
93
int init_master_info(Master_info* mi, const char* master_info_fname,
94
const char* slave_info_fname,
95
bool abort_if_no_master_info_file,
99
char fname[FN_REFLEN+128];
157
104
We have to reset read position of relay-log-bin as we may have
168
115
if (thread_mask & SLAVE_SQL)
170
my_b_seek(rli.cur_log, (my_off_t) 0);
117
my_b_seek(mi->rli.cur_log, (my_off_t) 0);
178
char fname[FN_REFLEN+128];
180
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
181
info_filename.assign(fname);
124
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
185
127
We need a mutex while we are changing master info parameters to
186
128
keep other threads from reading bogus info
189
pthread_mutex_lock(&data_lock);
131
pthread_mutex_lock(&mi->data_lock);
191
134
/* does master.info exist ? */
193
if (access(info_filename.c_str(), F_OK))
136
if (access(fname,F_OK))
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))
138
if (abort_if_no_master_info_file)
140
pthread_mutex_unlock(&mi->data_lock);
144
if someone removed the file from underneath our feet, just close
145
the old descriptor and re-create the old file
148
my_close(fd, MYF(MY_WME));
149
if ((fd = my_open(fname, O_CREAT|O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
151
sql_print_error("Failed to create a new master info file (file '%s', errno %d)", fname, my_errno);
154
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,0,
157
sql_print_error("Failed to create a cache on master info file (file '%s')", fname);
162
init_master_log_pos(mi);
216
165
else // file exists
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();
168
reinit_io_cache(&mi->file, READ_CACHE, 0L,0,0);
171
if ((fd = my_open(fname, O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
173
sql_print_error("Failed to open the existing master info file (file '%s', errno %d)", fname, my_errno);
176
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,
179
sql_print_error("Failed to create a cache on master info file (file '%s')", fname);
185
int port, connect_retry, master_log_pos, lines;
186
int ssl= 0, ssl_verify_server_cert= 0;
187
float master_heartbeat_period= 0.0;
188
char *first_non_digit;
191
Starting from 4.1.x master.info has new format. Now its
192
first line contains number of lines in file. By reading this
193
number we will be always distinguish to which version our
194
master.info corresponds to. We can't simply count lines in
195
file since versions before 4.1.x could generate files with more
197
If first line doesn't contain a number or contain number less than
198
LINES_IN_MASTER_INFO_WITH_SSL then such file is treated like file
199
from pre 4.1.1 version.
200
There is no ambiguity when reading an old master.info, as before
201
4.1.1, the first line contained the binlog's name, which is either
202
empty or has an extension (contains a '.'), so can't be confused
205
So we're just reading first line and trying to figure which version
210
The first row is temporarily stored in mi->master_log_name,
211
if it is line count and not binlog name (new format) it will be
212
overwritten by the second row later.
214
if (init_strvar_from_file(mi->master_log_name,
215
sizeof(mi->master_log_name), &mi->file,
219
lines= strtoul(mi->master_log_name, &first_non_digit, 10);
221
if (mi->master_log_name[0]!='\0' &&
222
*first_non_digit=='\0' && lines >= LINES_IN_MASTER_INFO_WITH_SSL)
224
/* Seems to be new format => read master log name from next line */
225
if (init_strvar_from_file(mi->master_log_name,
226
sizeof(mi->master_log_name), &mi->file, ""))
232
if (init_intvar_from_file(&master_log_pos, &mi->file, 4) ||
233
init_strvar_from_file(mi->host, sizeof(mi->host), &mi->file, 0) ||
234
init_strvar_from_file(mi->user, sizeof(mi->user), &mi->file, "test") ||
235
init_strvar_from_file(mi->password, SCRAMBLED_PASSWORD_CHAR_LENGTH+1,
237
init_intvar_from_file(&port, &mi->file, MYSQL_PORT) ||
238
init_intvar_from_file(&connect_retry, &mi->file, DEFAULT_CONNECT_RETRY))
242
If file has ssl part use it even if we have server without
243
SSL support. But these option will be ignored later when
244
slave will try connect to master, so in this case warning
247
if (lines >= LINES_IN_MASTER_INFO_WITH_SSL)
249
if (init_intvar_from_file(&ssl, &mi->file, 0) ||
250
init_strvar_from_file(mi->ssl_ca, sizeof(mi->ssl_ca),
252
init_strvar_from_file(mi->ssl_capath, sizeof(mi->ssl_capath),
254
init_strvar_from_file(mi->ssl_cert, sizeof(mi->ssl_cert),
256
init_strvar_from_file(mi->ssl_cipher, sizeof(mi->ssl_cipher),
258
init_strvar_from_file(mi->ssl_key, sizeof(mi->ssl_key),
263
Starting from 5.1.16 ssl_verify_server_cert might be
266
if (lines >= LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT &&
267
init_intvar_from_file(&ssl_verify_server_cert, &mi->file, 0))
270
Starting from 6.0 master_heartbeat_period might be
273
if (lines >= LINE_FOR_MASTER_HEARTBEAT_PERIOD &&
274
init_floatvar_from_file(&master_heartbeat_period, &mi->file, 0.0))
279
sql_print_warning("SSL information in the master info file "
280
"('%s') are ignored because this MySQL slave was "
281
"compiled without SSL support.", fname);
284
This has to be handled here as init_intvar_from_file can't handle
287
mi->master_log_pos= (my_off_t) master_log_pos;
288
mi->port= (uint) port;
289
mi->connect_retry= (uint) connect_retry;
291
mi->ssl_verify_server_cert= ssl_verify_server_cert;
292
mi->heartbeat_period= master_heartbeat_period;
245
if (init_relay_log_info(&rli, slave_info_fname))
296
if (init_relay_log_info(&mi->rli, slave_info_fname))
249
if ((error= test(flush())))
250
sql_print_error(_("Failed to flush master info file"));
251
pthread_mutex_unlock(&data_lock);
300
// now change cache READ -> WRITE - must do this before flush_master_info
301
reinit_io_cache(&mi->file, WRITE_CACHE, 0L, 0, 1);
302
if ((error=test(flush_master_info(mi, 1))))
303
sql_print_error("Failed to flush master info file");
304
pthread_mutex_unlock(&mi->data_lock);
308
sql_print_error("Error reading master configuration");
255
pthread_mutex_unlock(&data_lock);
313
my_close(fd, MYF(0));
314
end_io_cache(&mi->file);
317
pthread_mutex_unlock(&mi->data_lock);
277
342
When we come to this place in code, relay log may or not be initialized;
278
343
the caller is responsible for setting 'flush_relay_log_cache' accordingly.
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))
345
if (flush_relay_log_cache &&
346
flush_io_cache(mi->rli.relay_log.get_log_file()))
350
We flushed the relay log BEFORE the master.info file, because if we crash
351
now, we will get a duplicate event in the relay log at restart. If we
352
flushed in the other order, we would get a hole in the relay log.
353
And duplicate is better than hole (with a duplicate, in later versions we
354
can add detection and scrap one event; with a hole there's nothing we can
359
In certain cases this code may create master.info files that seems
360
corrupted, because of extra lines filled with garbage in the end
361
file (this happens if new contents take less space than previous
362
contents of file). But because of number of lines in the first line
363
of file we don't care about this garbage.
365
char heartbeat_buf[sizeof(mi->heartbeat_period) * 4]; // buffer to suffice always
366
my_sprintf(heartbeat_buf, (heartbeat_buf, "%.3f", mi->heartbeat_period));
369
"%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",
370
LINES_IN_MASTER_INFO,
371
mi->master_log_name, llstr(mi->master_log_pos, lbuf),
373
mi->password, mi->port, mi->connect_retry,
374
(int)(mi->ssl), mi->ssl_ca, mi->ssl_capath, mi->ssl_cert,
375
mi->ssl_cipher, mi->ssl_key, mi->ssl_verify_server_cert,
377
return(-flush_io_cache(file));
305
void Master_info::end_master_info()
381
void end_master_info(Master_info* mi)
309
end_relay_log_info(&rli);
385
end_relay_log_info(&mi->rli);
388
end_io_cache(&mi->file);
389
(void)my_close(mi->fd, MYF(MY_WME));
398
#endif /* HAVE_REPLICATION */