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
DBUG_ENTER("init_master_log_pos");
65
mi->master_log_name[0] = 0;
66
mi->master_log_pos = BIN_LOG_HEADER_SIZE; // skip magic number
68
always request heartbeat unless master_heartbeat_period is set
69
explicitly zero. Here is the default value for heartbeat period
70
if CHANGE MASTER did not specify it. (no data loss in conversion
71
as hb period has a max)
73
mi->heartbeat_period= (float) min(SLAVE_MAX_HEARTBEAT_PERIOD,
74
(slave_net_timeout/2.0));
75
DBUG_ASSERT(mi->heartbeat_period > (float) 0.001
76
|| mi->heartbeat_period == 0);
82
LINES_IN_MASTER_INFO_WITH_SSL= 14,
84
/* 5.1.16 added value of master_ssl_verify_server_cert */
85
LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT= 15,
87
/* 6.0 added value of master_heartbeat_period */
88
LINE_FOR_MASTER_HEARTBEAT_PERIOD= 16,
90
/* Number of lines currently used when saving master info file */
91
LINES_IN_MASTER_INFO= LINE_FOR_MASTER_HEARTBEAT_PERIOD
95
int init_master_info(Master_info* mi, const char* master_info_fname,
96
const char* slave_info_fname,
97
bool abort_if_no_master_info_file,
101
char fname[FN_REFLEN+128];
102
DBUG_ENTER("init_master_info");
157
107
We have to reset read position of relay-log-bin as we may have
168
118
if (thread_mask & SLAVE_SQL)
170
my_b_seek(rli.cur_log, (my_off_t) 0);
120
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);
127
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
185
130
We need a mutex while we are changing master info parameters to
186
131
keep other threads from reading bogus info
189
pthread_mutex_lock(&data_lock);
134
pthread_mutex_lock(&mi->data_lock);
191
137
/* does master.info exist ? */
193
if (access(info_filename.c_str(), F_OK))
139
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))
141
if (abort_if_no_master_info_file)
143
pthread_mutex_unlock(&mi->data_lock);
147
if someone removed the file from underneath our feet, just close
148
the old descriptor and re-create the old file
151
my_close(fd, MYF(MY_WME));
152
if ((fd = my_open(fname, O_CREAT|O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
154
sql_print_error("Failed to create a new master info file (file '%s', errno %d)", fname, my_errno);
157
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,0,
160
sql_print_error("Failed to create a cache on master info file (file '%s')", fname);
165
init_master_log_pos(mi);
216
168
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();
171
reinit_io_cache(&mi->file, READ_CACHE, 0L,0,0);
174
if ((fd = my_open(fname, O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
176
sql_print_error("Failed to open the existing master info file (file '%s', errno %d)", fname, my_errno);
179
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,
182
sql_print_error("Failed to create a cache on master info file (file '%s')", fname);
188
int port, connect_retry, master_log_pos, lines;
189
int ssl= 0, ssl_verify_server_cert= 0;
190
float master_heartbeat_period= 0.0;
191
char *first_non_digit;
194
Starting from 4.1.x master.info has new format. Now its
195
first line contains number of lines in file. By reading this
196
number we will be always distinguish to which version our
197
master.info corresponds to. We can't simply count lines in
198
file since versions before 4.1.x could generate files with more
200
If first line doesn't contain a number or contain number less than
201
LINES_IN_MASTER_INFO_WITH_SSL then such file is treated like file
202
from pre 4.1.1 version.
203
There is no ambiguity when reading an old master.info, as before
204
4.1.1, the first line contained the binlog's name, which is either
205
empty or has an extension (contains a '.'), so can't be confused
208
So we're just reading first line and trying to figure which version
213
The first row is temporarily stored in mi->master_log_name,
214
if it is line count and not binlog name (new format) it will be
215
overwritten by the second row later.
217
if (init_strvar_from_file(mi->master_log_name,
218
sizeof(mi->master_log_name), &mi->file,
222
lines= strtoul(mi->master_log_name, &first_non_digit, 10);
224
if (mi->master_log_name[0]!='\0' &&
225
*first_non_digit=='\0' && lines >= LINES_IN_MASTER_INFO_WITH_SSL)
227
/* Seems to be new format => read master log name from next line */
228
if (init_strvar_from_file(mi->master_log_name,
229
sizeof(mi->master_log_name), &mi->file, ""))
235
if (init_intvar_from_file(&master_log_pos, &mi->file, 4) ||
236
init_strvar_from_file(mi->host, sizeof(mi->host), &mi->file, 0) ||
237
init_strvar_from_file(mi->user, sizeof(mi->user), &mi->file, "test") ||
238
init_strvar_from_file(mi->password, SCRAMBLED_PASSWORD_CHAR_LENGTH+1,
240
init_intvar_from_file(&port, &mi->file, MYSQL_PORT) ||
241
init_intvar_from_file(&connect_retry, &mi->file, DEFAULT_CONNECT_RETRY))
245
If file has ssl part use it even if we have server without
246
SSL support. But these option will be ignored later when
247
slave will try connect to master, so in this case warning
250
if (lines >= LINES_IN_MASTER_INFO_WITH_SSL)
252
if (init_intvar_from_file(&ssl, &mi->file, 0) ||
253
init_strvar_from_file(mi->ssl_ca, sizeof(mi->ssl_ca),
255
init_strvar_from_file(mi->ssl_capath, sizeof(mi->ssl_capath),
257
init_strvar_from_file(mi->ssl_cert, sizeof(mi->ssl_cert),
259
init_strvar_from_file(mi->ssl_cipher, sizeof(mi->ssl_cipher),
261
init_strvar_from_file(mi->ssl_key, sizeof(mi->ssl_key),
266
Starting from 5.1.16 ssl_verify_server_cert might be
269
if (lines >= LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT &&
270
init_intvar_from_file(&ssl_verify_server_cert, &mi->file, 0))
273
Starting from 6.0 master_heartbeat_period might be
276
if (lines >= LINE_FOR_MASTER_HEARTBEAT_PERIOD &&
277
init_floatvar_from_file(&master_heartbeat_period, &mi->file, 0.0))
282
sql_print_warning("SSL information in the master info file "
283
"('%s') are ignored because this MySQL slave was "
284
"compiled without SSL support.", fname);
287
This has to be handled here as init_intvar_from_file can't handle
290
mi->master_log_pos= (my_off_t) master_log_pos;
291
mi->port= (uint) port;
292
mi->connect_retry= (uint) connect_retry;
293
mi->ssl= (my_bool) ssl;
294
mi->ssl_verify_server_cert= ssl_verify_server_cert;
295
mi->heartbeat_period= master_heartbeat_period;
297
DBUG_PRINT("master_info",("log_file_name: %s position: %ld",
299
(ulong) mi->master_log_pos));
245
if (init_relay_log_info(&rli, slave_info_fname))
302
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);
306
// now change cache READ -> WRITE - must do this before flush_master_info
307
reinit_io_cache(&mi->file, WRITE_CACHE, 0L, 0, 1);
308
if ((error=test(flush_master_info(mi, 1))))
309
sql_print_error("Failed to flush master info file");
310
pthread_mutex_unlock(&mi->data_lock);
314
sql_print_error("Error reading master configuration");
255
pthread_mutex_unlock(&data_lock);
319
my_close(fd, MYF(0));
320
end_io_cache(&mi->file);
323
pthread_mutex_unlock(&mi->data_lock);
277
351
When we come to this place in code, relay log may or not be initialized;
278
352
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))
354
if (flush_relay_log_cache &&
355
flush_io_cache(mi->rli.relay_log.get_log_file()))
359
We flushed the relay log BEFORE the master.info file, because if we crash
360
now, we will get a duplicate event in the relay log at restart. If we
361
flushed in the other order, we would get a hole in the relay log.
362
And duplicate is better than hole (with a duplicate, in later versions we
363
can add detection and scrap one event; with a hole there's nothing we can
368
In certain cases this code may create master.info files that seems
369
corrupted, because of extra lines filled with garbage in the end
370
file (this happens if new contents take less space than previous
371
contents of file). But because of number of lines in the first line
372
of file we don't care about this garbage.
374
char heartbeat_buf[sizeof(mi->heartbeat_period) * 4]; // buffer to suffice always
375
my_sprintf(heartbeat_buf, (heartbeat_buf, "%.3f", mi->heartbeat_period));
378
"%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",
379
LINES_IN_MASTER_INFO,
380
mi->master_log_name, llstr(mi->master_log_pos, lbuf),
382
mi->password, mi->port, mi->connect_retry,
383
(int)(mi->ssl), mi->ssl_ca, mi->ssl_capath, mi->ssl_cert,
384
mi->ssl_cipher, mi->ssl_key, mi->ssl_verify_server_cert,
386
DBUG_RETURN(-flush_io_cache(file));
390
void end_master_info(Master_info* mi)
392
DBUG_ENTER("end_master_info");
396
end_relay_log_info(&mi->rli);
399
end_io_cache(&mi->file);
400
(void)my_close(mi->fd, MYF(MY_WME));
305
void Master_info::end_master_info()
309
end_relay_log_info(&rli);
409
#endif /* HAVE_REPLICATION */