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mariadb/sql/rpl_mi.cc
Eric Herman 401ff6994d MDEV-26221: DYNAMIC_ARRAY use size_t for sizes 
https://jira.mariadb.org/browse/MDEV-26221
my_sys DYNAMIC_ARRAY and DYNAMIC_STRING inconsistancy

The DYNAMIC_STRING uses size_t for sizes, but DYNAMIC_ARRAY used uint.
This patch adjusts DYNAMIC_ARRAY to use size_t like DYNAMIC_STRING.

As the MY_DIR member number_of_files is copied from a DYNAMIC_ARRAY,
this is changed to be size_t.

As MY_TMPDIR members 'cur' and 'max' are copied from a DYNAMIC_ARRAY,
these are also changed to be size_t.

The lists of plugins and stored procedures use DYNAMIC_ARRAY,
but their APIs assume a size of 'uint'; these are unchanged.
2021-10-19 16:00:26 +03:00

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/* Copyright (c) 2006, 2017, Oracle and/or its affiliates.
Copyright (c) 2010, 2017, MariaDB Corporation
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include "mariadb.h" // For HAVE_REPLICATION
#include "sql_priv.h"
#include <my_dir.h>
#include "rpl_mi.h"
#include "slave.h"
#include "strfunc.h"
#include "sql_repl.h"
#ifdef HAVE_REPLICATION
#define DEFAULT_CONNECT_RETRY 60
static void init_master_log_pos(Master_info* mi);
Master_info::Master_info(LEX_CSTRING *connection_name_arg,
bool is_slave_recovery)
:Slave_reporting_capability("I/O"),
ssl(0), ssl_verify_server_cert(1), fd(-1), io_thd(0),
rli(is_slave_recovery), port(MYSQL_PORT),
checksum_alg_before_fd(BINLOG_CHECKSUM_ALG_UNDEF),
connect_retry(DEFAULT_CONNECT_RETRY), inited(0), abort_slave(0),
slave_running(MYSQL_SLAVE_NOT_RUN), slave_run_id(0),
clock_diff_with_master(0),
sync_counter(0), heartbeat_period(0), received_heartbeats(0),
master_id(0), prev_master_id(0),
using_gtid(USE_GTID_NO), events_queued_since_last_gtid(0),
gtid_reconnect_event_skip_count(0), gtid_event_seen(false),
in_start_all_slaves(0), in_stop_all_slaves(0), in_flush_all_relay_logs(0),
users(0), killed(0),
total_ddl_groups(0), total_non_trans_groups(0), total_trans_groups(0)
{
char *tmp;
host[0] = 0; user[0] = 0; password[0] = 0;
ssl_ca[0]= 0; ssl_capath[0]= 0; ssl_cert[0]= 0;
ssl_cipher[0]= 0; ssl_key[0]= 0;
ssl_crl[0]= 0; ssl_crlpath[0]= 0;
/*
Store connection name and lower case connection name
It's safe to ignore any OMM errors as this is checked by error()
*/
connection_name.length= cmp_connection_name.length=
connection_name_arg->length;
if ((connection_name.str= tmp= (char*)
my_malloc(PSI_INSTRUMENT_ME, connection_name_arg->length*2+2, MYF(MY_WME))))
{
strmake(tmp, connection_name_arg->str, connection_name.length);
tmp+= connection_name_arg->length+1;
cmp_connection_name.str= tmp;
memcpy(tmp, connection_name_arg->str, connection_name.length+1);
my_casedn_str(system_charset_info, tmp);
}
/*
When MySQL restarted, all Rpl_filter settings which aren't in the my.cnf
will be lost. If you want to lose a setting after restart, you
should add them into my.cnf
*/
rpl_filter= get_or_create_rpl_filter(connection_name.str,
connection_name.length);
copy_filter_setting(rpl_filter, global_rpl_filter);
parallel_mode= rpl_filter->get_parallel_mode();
my_init_dynamic_array(PSI_INSTRUMENT_ME, &ignore_server_ids,
sizeof(global_system_variables.server_id), 16, 16,
MYF(0));
bzero((char*) &file, sizeof(file));
mysql_mutex_init(key_master_info_run_lock, &run_lock, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_master_info_data_lock, &data_lock, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_master_info_start_stop_lock, &start_stop_lock,
MY_MUTEX_INIT_SLOW);
mysql_mutex_setflags(&run_lock, MYF_NO_DEADLOCK_DETECTION);
mysql_mutex_setflags(&data_lock, MYF_NO_DEADLOCK_DETECTION);
mysql_mutex_init(key_master_info_sleep_lock, &sleep_lock, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_master_info_data_cond, &data_cond, NULL);
mysql_cond_init(key_master_info_start_cond, &start_cond, NULL);
mysql_cond_init(key_master_info_stop_cond, &stop_cond, NULL);
mysql_cond_init(key_master_info_sleep_cond, &sleep_cond, NULL);
}
/**
Wait until no one is using Master_info
*/
void Master_info::wait_until_free()
{
mysql_mutex_lock(&sleep_lock);
killed= 1;
while (users)
mysql_cond_wait(&sleep_cond, &sleep_lock);
mysql_mutex_unlock(&sleep_lock);
}
/**
Delete master_info
*/
Master_info::~Master_info()
{
wait_until_free();
my_free(const_cast<char*>(connection_name.str));
delete_dynamic(&ignore_server_ids);
mysql_mutex_destroy(&run_lock);
mysql_mutex_destroy(&data_lock);
mysql_mutex_destroy(&sleep_lock);
mysql_mutex_destroy(&start_stop_lock);
mysql_cond_destroy(&data_cond);
mysql_cond_destroy(&start_cond);
mysql_cond_destroy(&stop_cond);
mysql_cond_destroy(&sleep_cond);
}
/**
A comparison function to be supplied as argument to @c sort_dynamic()
and @c bsearch()
@return -1 if first argument is less, 0 if it equal to, 1 if it is greater
than the second
*/
static int change_master_id_cmp(const void *id1, const void *id2)
{
return (*(ulong *) id1 - *(ulong *) id2);
}
/**
Reports if the s_id server has been configured to ignore events
it generates with
CHANGE MASTER IGNORE_SERVER_IDS= ( list of server ids )
Method is called from the io thread event receiver filtering.
@param s_id the master server identifier
@retval TRUE if s_id is in the list of ignored master servers,
@retval FALSE otherwise.
*/
bool Master_info::shall_ignore_server_id(ulong s_id)
{
if (likely(ignore_server_ids.elements == 1))
return (* (ulong*) dynamic_array_ptr(&ignore_server_ids, 0)) == s_id;
else
return bsearch((const ulong *) &s_id,
ignore_server_ids.buffer,
ignore_server_ids.elements, sizeof(ulong),
change_master_id_cmp) != NULL;
}
void Master_info::clear_in_memory_info(bool all)
{
init_master_log_pos(this);
if (all)
{
port= MYSQL_PORT;
host[0] = 0; user[0] = 0; password[0] = 0;
}
}
const char *
Master_info::using_gtid_astext(enum enum_using_gtid arg)
{
switch (arg)
{
case USE_GTID_NO:
return "No";
case USE_GTID_SLAVE_POS:
return "Slave_Pos";
default:
DBUG_ASSERT(arg == USE_GTID_CURRENT_POS);
return "Current_Pos";
}
}
void init_master_log_pos(Master_info* mi)
{
DBUG_ENTER("init_master_log_pos");
mi->master_log_name[0] = 0;
mi->master_log_pos = BIN_LOG_HEADER_SIZE; // skip magic number
mi->using_gtid= Master_info::USE_GTID_NO;
mi->gtid_current_pos.reset();
mi->events_queued_since_last_gtid= 0;
mi->gtid_reconnect_event_skip_count= 0;
mi->gtid_event_seen= false;
/* Intentionally init ssl_verify_server_cert to 0, no option available */
mi->ssl_verify_server_cert= 0;
/*
always request heartbeat unless master_heartbeat_period is set
explicitly zero. Here is the default value for heartbeat period
if CHANGE MASTER did not specify it. (no data loss in conversion
as hb period has a max)
*/
mi->heartbeat_period= (float) MY_MIN(SLAVE_MAX_HEARTBEAT_PERIOD,
(slave_net_timeout/2.0));
DBUG_ASSERT(mi->heartbeat_period > (float) 0.001
|| mi->heartbeat_period == 0);
DBUG_VOID_RETURN;
}
/**
Parses the IO_CACHE for "key=" and returns the "key".
If no '=' found, returns the whole line (for END_MARKER).
@param key [OUT] Key buffer
@param max_size [IN] Maximum buffer size
@param f [IN] IO_CACHE file
@param found_equal [OUT] Set true if a '=' was found.
@retval 0 Either "key=" or '\n' found
@retval 1 EOF
*/
static int
read_mi_key_from_file(char *key, int max_size, IO_CACHE *f, bool *found_equal)
{
int i= 0, c;
DBUG_ENTER("read_key_from_file");
*found_equal= false;
if (max_size <= 0)
DBUG_RETURN(1);
for (;;)
{
if (i >= max_size-1)
{
key[i] = '\0';
DBUG_RETURN(0);
}
c= my_b_get(f);
if (c == my_b_EOF)
{
DBUG_RETURN(1);
}
else if (c == '\n')
{
key[i]= '\0';
DBUG_RETURN(0);
}
else if (c == '=')
{
key[i]= '\0';
*found_equal= true;
DBUG_RETURN(0);
}
else
{
key[i]= c;
++i;
}
}
/* NotReached */
}
enum {
LINES_IN_MASTER_INFO_WITH_SSL= 14,
/* 5.1.16 added value of master_ssl_verify_server_cert */
LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT= 15,
/* 5.5 added value of master_heartbeat_period */
LINE_FOR_MASTER_HEARTBEAT_PERIOD= 16,
/* MySQL Cluster 6.3 added master_bind */
LINE_FOR_MASTER_BIND = 17,
/* 6.0 added value of master_ignore_server_id */
LINE_FOR_REPLICATE_IGNORE_SERVER_IDS= 18,
/* 6.0 added value of master_uuid */
LINE_FOR_MASTER_UUID= 19,
/* line for master_retry_count */
LINE_FOR_MASTER_RETRY_COUNT= 20,
/* line for ssl_crl */
LINE_FOR_SSL_CRL= 21,
/* line for ssl_crl */
LINE_FOR_SSL_CRLPATH= 22,
/* MySQL 5.6 fixed-position lines. */
LINE_FOR_FIRST_MYSQL_5_6=23,
LINE_FOR_LAST_MYSQL_5_6=23,
/* Reserved lines for MySQL future versions. */
LINE_FOR_LAST_MYSQL_FUTURE=33,
/* Number of (fixed-position) lines used when saving master info file */
LINES_IN_MASTER_INFO= LINE_FOR_LAST_MYSQL_FUTURE
};
int init_master_info(Master_info* mi, const char* master_info_fname,
const char* slave_info_fname,
bool abort_if_no_master_info_file,
int thread_mask)
{
int fd,error;
char fname[FN_REFLEN+128];
DBUG_ENTER("init_master_info");
if (mi->inited)
{
/*
We have to reset read position of relay-log-bin as we may have
already been reading from 'hotlog' when the slave was stopped
last time. If this case pos_in_file would be set and we would
get a crash when trying to read the signature for the binary
relay log.
We only rewind the read position if we are starting the SQL
thread. The handle_slave_sql thread assumes that the read
position is at the beginning of the file, and will read the
"signature" and then fast-forward to the last position read.
*/
if (thread_mask & SLAVE_SQL)
{
bool hot_log= FALSE;
/*
my_b_seek does an implicit flush_io_cache, so we need to:
1. check if this log is active (hot)
2. if it is we keep log_lock until the seek ends, otherwise
release it right away.
If we did not take log_lock, SQL thread might race with IO
thread for the IO_CACHE mutex.
*/
mysql_mutex_t *log_lock= mi->rli.relay_log.get_log_lock();
mysql_mutex_lock(log_lock);
hot_log= mi->rli.relay_log.is_active(mi->rli.linfo.log_file_name);
if (!hot_log)
mysql_mutex_unlock(log_lock);
my_b_seek(mi->rli.cur_log, (my_off_t) 0);
if (hot_log)
mysql_mutex_unlock(log_lock);
}
DBUG_RETURN(0);
}
mi->mysql=0;
mi->file_id=1;
fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);
/*
We need a mutex while we are changing master info parameters to
keep other threads from reading bogus info
*/
mysql_mutex_lock(&mi->data_lock);
fd = mi->fd;
/* does master.info exist ? */
if (access(fname,F_OK))
{
if (abort_if_no_master_info_file)
{
mysql_mutex_unlock(&mi->data_lock);
DBUG_RETURN(0);
}
/*
if someone removed the file from underneath our feet, just close
the old descriptor and re-create the old file
*/
if (fd >= 0)
mysql_file_close(fd, MYF(MY_WME));
if ((fd= mysql_file_open(key_file_master_info,
fname, O_CREAT|O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
{
sql_print_error("Failed to create a new master info file (\
file '%s', errno %d)", fname, my_errno);
goto err;
}
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,0,
MYF(MY_WME)))
{
sql_print_error("Failed to create a cache on master info file (\
file '%s')", fname);
goto err;
}
mi->fd = fd;
mi->clear_in_memory_info(false);
}
else // file exists
{
if (fd >= 0)
reinit_io_cache(&mi->file, READ_CACHE, 0L,0,0);
else
{
if ((fd= mysql_file_open(key_file_master_info,
fname, O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
{
sql_print_error("Failed to open the existing master info file (\
file '%s', errno %d)", fname, my_errno);
goto err;
}
if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,
0, MYF(MY_WME)))
{
sql_print_error("Failed to create a cache on master info file (\
file '%s')", fname);
goto err;
}
}
mi->fd = fd;
int port, connect_retry, master_log_pos, lines;
int ssl= 0, ssl_verify_server_cert= 0;
float master_heartbeat_period= 0.0;
char *first_non_digit;
char buf[HOSTNAME_LENGTH+1];
/*
Starting from 4.1.x master.info has new format. Now its
first line contains number of lines in file. By reading this
number we will be always distinguish to which version our
master.info corresponds to. We can't simply count lines in
file since versions before 4.1.x could generate files with more
lines than needed.
If first line doesn't contain a number or contain number less than
LINES_IN_MASTER_INFO_WITH_SSL then such file is treated like file
from pre 4.1.1 version.
There is no ambiguity when reading an old master.info, as before
4.1.1, the first line contained the binlog's name, which is either
empty or has an extension (contains a '.'), so can't be confused
with an integer.
So we're just reading first line and trying to figure which version
is this.
*/
/*
The first row is temporarily stored in mi->master_log_name,
if it is line count and not binlog name (new format) it will be
overwritten by the second row later.
*/
if (init_strvar_from_file(mi->master_log_name,
sizeof(mi->master_log_name), &mi->file,
""))
goto errwithmsg;
lines= strtoul(mi->master_log_name, &first_non_digit, 10);
if (mi->master_log_name[0]!='\0' &&
*first_non_digit=='\0' && lines >= LINES_IN_MASTER_INFO_WITH_SSL)
{
/* Seems to be new format => read master log name from next line */
if (init_strvar_from_file(mi->master_log_name,
sizeof(mi->master_log_name), &mi->file, ""))
goto errwithmsg;
}
else
lines= 7;
if (init_intvar_from_file(&master_log_pos, &mi->file, 4) ||
init_strvar_from_file(mi->host, sizeof(mi->host), &mi->file, 0) ||
init_strvar_from_file(mi->user, sizeof(mi->user), &mi->file, "test") ||
init_strvar_from_file(mi->password, SCRAMBLED_PASSWORD_CHAR_LENGTH+1,
&mi->file, 0) ||
init_intvar_from_file(&port, &mi->file, MYSQL_PORT) ||
init_intvar_from_file(&connect_retry, &mi->file,
DEFAULT_CONNECT_RETRY))
goto errwithmsg;
/*
If file has ssl part use it even if we have server without
SSL support. But these options will be ignored later when
slave will try connect to master, so in this case warning
is printed.
*/
if (lines >= LINES_IN_MASTER_INFO_WITH_SSL)
{
if (init_intvar_from_file(&ssl, &mi->file, 0) ||
init_strvar_from_file(mi->ssl_ca, sizeof(mi->ssl_ca),
&mi->file, 0) ||
init_strvar_from_file(mi->ssl_capath, sizeof(mi->ssl_capath),
&mi->file, 0) ||
init_strvar_from_file(mi->ssl_cert, sizeof(mi->ssl_cert),
&mi->file, 0) ||
init_strvar_from_file(mi->ssl_cipher, sizeof(mi->ssl_cipher),
&mi->file, 0) ||
init_strvar_from_file(mi->ssl_key, sizeof(mi->ssl_key),
&mi->file, 0))
goto errwithmsg;
/*
Starting from 5.1.16 ssl_verify_server_cert might be
in the file
*/
if (lines >= LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT &&
init_intvar_from_file(&ssl_verify_server_cert, &mi->file, 0))
goto errwithmsg;
/*
Starting from 6.0 master_heartbeat_period might be
in the file
*/
if (lines >= LINE_FOR_MASTER_HEARTBEAT_PERIOD &&
init_floatvar_from_file(&master_heartbeat_period, &mi->file, 0.0))
goto errwithmsg;
/*
Starting from MySQL Cluster 6.3 master_bind might be in the file
(this is just a reservation to avoid future upgrade problems)
*/
if (lines >= LINE_FOR_MASTER_BIND &&
init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
goto errwithmsg;
/*
Starting from 6.0 list of server_id of ignorable servers might be
in the file
*/
if (lines >= LINE_FOR_REPLICATE_IGNORE_SERVER_IDS &&
init_dynarray_intvar_from_file(&mi->ignore_server_ids, &mi->file))
{
sql_print_error("Failed to initialize master info ignore_server_ids");
goto errwithmsg;
}
/* reserved */
if (lines >= LINE_FOR_MASTER_UUID &&
init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
goto errwithmsg;
/* Starting from 5.5 the master_retry_count may be in the repository. */
if (lines >= LINE_FOR_MASTER_RETRY_COUNT &&
init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
goto errwithmsg;
if (lines >= LINE_FOR_SSL_CRLPATH &&
(init_strvar_from_file(mi->ssl_crl, sizeof(mi->ssl_crl),
&mi->file, "") ||
init_strvar_from_file(mi->ssl_crlpath, sizeof(mi->ssl_crlpath),
&mi->file, "")))
goto errwithmsg;
/*
Starting with MariaDB 10.0, we use a key=value syntax, which is nicer
in several ways. But we leave a bunch of empty lines to accomodate
any future old-style additions in MySQL (this will make it easier for
users moving from MariaDB to MySQL, to not have MySQL try to
interpret a MariaDB key=value line.)
*/
if (lines >= LINE_FOR_LAST_MYSQL_FUTURE)
{
uint i;
bool got_eq;
bool seen_using_gtid= false;
bool seen_do_domain_ids=false, seen_ignore_domain_ids=false;
/* Skip lines used by / reserved for MySQL >= 5.6. */
for (i= LINE_FOR_FIRST_MYSQL_5_6; i <= LINE_FOR_LAST_MYSQL_FUTURE; ++i)
{
if (init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
goto errwithmsg;
}
/*
Parse any extra key=value lines. read_key_from_file() parses the file
for "key=" and returns the "key" if found. The "value" can then the
parsed on case by case basis. The "unknown" lines would be ignored to
facilitate downgrades.
10.0 does not have the END_MARKER before any left-overs at the end
of the file. So ignore any but the first occurrence of a key.
*/
while (!read_mi_key_from_file(buf, sizeof(buf), &mi->file, &got_eq))
{
if (got_eq && !seen_using_gtid && !strcmp(buf, "using_gtid"))
{
int val;
if (!init_intvar_from_file(&val, &mi->file, 0))
{
if (val == Master_info::USE_GTID_CURRENT_POS)
mi->using_gtid= Master_info::USE_GTID_CURRENT_POS;
else if (val == Master_info::USE_GTID_SLAVE_POS)
mi->using_gtid= Master_info::USE_GTID_SLAVE_POS;
else
mi->using_gtid= Master_info::USE_GTID_NO;
seen_using_gtid= true;
} else {
sql_print_error("Failed to initialize master info using_gtid");
goto errwithmsg;
}
}
else if (got_eq && !seen_do_domain_ids && !strcmp(buf, "do_domain_ids"))
{
if (mi->domain_id_filter.init_ids(&mi->file,
Domain_id_filter::DO_DOMAIN_IDS))
{
sql_print_error("Failed to initialize master info do_domain_ids");
goto errwithmsg;
}
seen_do_domain_ids= true;
}
else if (got_eq && !seen_ignore_domain_ids &&
!strcmp(buf, "ignore_domain_ids"))
{
if (mi->domain_id_filter.init_ids(&mi->file,
Domain_id_filter::IGNORE_DOMAIN_IDS))
{
sql_print_error("Failed to initialize master info "
"ignore_domain_ids");
goto errwithmsg;
}
seen_ignore_domain_ids= true;
}
else if (!got_eq && !strcmp(buf, "END_MARKER"))
{
/*
Guard agaist extra left-overs at the end of file, in case a later
update causes the file to shrink compared to earlier contents.
*/
break;
}
}
}
}
#ifndef HAVE_OPENSSL
if (ssl)
sql_print_warning("SSL information in the master info file "
"('%s') are ignored because this MySQL slave was "
"compiled without SSL support.", fname);
#endif /* HAVE_OPENSSL */
/*
This has to be handled here as init_intvar_from_file can't handle
my_off_t types
*/
mi->master_log_pos= (my_off_t) master_log_pos;
mi->port= (uint) port;
mi->connect_retry= (uint) connect_retry;
mi->ssl= (my_bool) ssl;
mi->ssl_verify_server_cert= ssl_verify_server_cert;
mi->heartbeat_period= MY_MIN(SLAVE_MAX_HEARTBEAT_PERIOD, master_heartbeat_period);
}
DBUG_PRINT("master_info",("log_file_name: %s position: %ld",
mi->master_log_name,
(ulong) mi->master_log_pos));
mi->rli.mi= mi;
if (mi->rli.init(slave_info_fname))
goto err;
mi->inited = 1;
mi->rli.is_relay_log_recovery= FALSE;
// now change cache READ -> WRITE - must do this before flush_master_info
reinit_io_cache(&mi->file, WRITE_CACHE, 0L, 0, 1);
if (unlikely((error= MY_TEST(flush_master_info(mi, TRUE, TRUE)))))
sql_print_error("Failed to flush master info file");
mysql_mutex_unlock(&mi->data_lock);
DBUG_RETURN(error);
errwithmsg:
sql_print_error("Error reading master configuration");
err:
if (fd >= 0)
{
mysql_file_close(fd, MYF(0));
end_io_cache(&mi->file);
}
mi->fd= -1;
mysql_mutex_unlock(&mi->data_lock);
DBUG_RETURN(1);
}
/*
RETURN
2 - flush relay log failed
1 - flush master info failed
0 - all ok
*/
int flush_master_info(Master_info* mi,
bool flush_relay_log_cache,
bool need_lock_relay_log)
{
IO_CACHE* file = &mi->file;
char lbuf[22];
int err= 0;
DBUG_ENTER("flush_master_info");
DBUG_PRINT("enter",("master_pos: %ld", (long) mi->master_log_pos));
/*
Flush the relay log to disk. If we don't do it, then the relay log while
have some part (its last kilobytes) in memory only, so if the slave server
dies now, with, say, from master's position 100 to 150 in memory only (not
on disk), and with position 150 in master.info, then when the slave
restarts, the I/O thread will fetch binlogs from 150, so in the relay log
we will have "[0, 100] U [150, infinity[" and nobody will notice it, so the
SQL thread will jump from 100 to 150, and replication will silently break.
When we come to this place in code, relay log may or not be initialized;
the caller is responsible for setting 'flush_relay_log_cache' accordingly.
*/
if (flush_relay_log_cache)
{
mysql_mutex_t *log_lock= mi->rli.relay_log.get_log_lock();
IO_CACHE *log_file= mi->rli.relay_log.get_log_file();
if (need_lock_relay_log)
mysql_mutex_lock(log_lock);
mysql_mutex_assert_owner(log_lock);
err= flush_io_cache(log_file);
if (need_lock_relay_log)
mysql_mutex_unlock(log_lock);
if (err)
DBUG_RETURN(2);
}
/*
produce a line listing the total number and all the ignored server_id:s
*/
char* ignore_server_ids_buf;
{
ignore_server_ids_buf=
(char *) my_malloc(PSI_INSTRUMENT_ME,
(sizeof(global_system_variables.server_id) * 3 + 1) *
(1 + mi->ignore_server_ids.elements), MYF(MY_WME));
if (!ignore_server_ids_buf)
DBUG_RETURN(1); /* error */
ulong cur_len= sprintf(ignore_server_ids_buf, "%zu",
mi->ignore_server_ids.elements);
for (ulong i= 0; i < mi->ignore_server_ids.elements; i++)
{
ulong s_id;
get_dynamic(&mi->ignore_server_ids, (uchar*) &s_id, i);
cur_len+= sprintf(ignore_server_ids_buf + cur_len, " %lu", s_id);
}
}
char *do_domain_ids_buf= 0, *ignore_domain_ids_buf= 0;
do_domain_ids_buf=
mi->domain_id_filter.as_string(Domain_id_filter::DO_DOMAIN_IDS);
if (do_domain_ids_buf == NULL)
{
err= 1; /* error */
goto done;
}
ignore_domain_ids_buf=
mi->domain_id_filter.as_string(Domain_id_filter::IGNORE_DOMAIN_IDS);
if (ignore_domain_ids_buf == NULL)
{
err= 1; /* error */
goto done;
}
/*
We flushed the relay log BEFORE the master.info file, because if we crash
now, we will get a duplicate event in the relay log at restart. If we
flushed in the other order, we would get a hole in the relay log.
And duplicate is better than hole (with a duplicate, in later versions we
can add detection and scrap one event; with a hole there's nothing we can
do).
*/
/*
In certain cases this code may create master.info files that seems
corrupted, because of extra lines filled with garbage in the end
file (this happens if new contents take less space than previous
contents of file). But because of number of lines in the first line
of file we don't care about this garbage.
*/
char heartbeat_buf[FLOATING_POINT_BUFFER];
my_fcvt(mi->heartbeat_period, 3, heartbeat_buf, NULL);
my_b_seek(file, 0L);
my_b_printf(file,
"%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%s\n%s\n%s\n%d\n%s\n%s\n"
"\n\n\n\n\n\n\n\n\n\n\n"
"using_gtid=%d\n"
"do_domain_ids=%s\n"
"ignore_domain_ids=%s\n"
"END_MARKER\n",
LINES_IN_MASTER_INFO,
mi->master_log_name, llstr(mi->master_log_pos, lbuf),
mi->host, mi->user,
mi->password, mi->port, mi->connect_retry,
(int)(mi->ssl), mi->ssl_ca, mi->ssl_capath, mi->ssl_cert,
mi->ssl_cipher, mi->ssl_key, mi->ssl_verify_server_cert,
heartbeat_buf, "", ignore_server_ids_buf,
"", 0,
mi->ssl_crl, mi->ssl_crlpath, mi->using_gtid,
do_domain_ids_buf, ignore_domain_ids_buf);
err= flush_io_cache(file);
if (sync_masterinfo_period && !err &&
++(mi->sync_counter) >= sync_masterinfo_period)
{
err= my_sync(mi->fd, MYF(MY_WME));
mi->sync_counter= 0;
}
/* Fix err; flush_io_cache()/my_sync() may return -1 */
err= (err != 0) ? 1 : 0;
done:
my_free(ignore_server_ids_buf);
my_free(do_domain_ids_buf);
my_free(ignore_domain_ids_buf);
DBUG_RETURN(err);
}
void end_master_info(Master_info* mi)
{
DBUG_ENTER("end_master_info");
if (!mi->inited)
DBUG_VOID_RETURN;
if (mi->fd >= 0)
{
end_io_cache(&mi->file);
mysql_file_close(mi->fd, MYF(MY_WME));
mi->fd = -1;
}
mi->inited = 0;
DBUG_VOID_RETURN;
}
/* Multi-Master By P.Linux */
uchar *get_key_master_info(Master_info *mi, size_t *length,
my_bool not_used __attribute__((unused)))
{
/* Return lower case name */
*length= mi->cmp_connection_name.length;
return (uchar*) mi->cmp_connection_name.str;
}
/*
Delete a master info
Called from my_hash_delete(&master_info_hash)
Stops associated slave threads and frees master_info
*/
void free_key_master_info(Master_info *mi)
{
DBUG_ENTER("free_key_master_info");
mysql_mutex_unlock(&LOCK_active_mi);
/* Ensure that we are not in reset_slave while this is done */
mi->lock_slave_threads();
terminate_slave_threads(mi,SLAVE_FORCE_ALL);
/* We use 2 here instead of 1 just to make it easier when debugging */
mi->killed= 2;
end_master_info(mi);
end_relay_log_info(&mi->rli);
mi->unlock_slave_threads();
delete mi;
mysql_mutex_lock(&LOCK_active_mi);
DBUG_VOID_RETURN;
}
/**
Check if connection name for master_info is valid.
It's valid if it's a valid system name of length less than
MAX_CONNECTION_NAME.
@return
0 ok
1 error
*/
bool check_master_connection_name(LEX_CSTRING *name)
{
if (name->length >= MAX_CONNECTION_NAME)
return 1;
return 0;
}
/**
Create a log file with a given suffix.
@param
res_file_name Store result here
length Length of res_file_name buffer
info_file Original file name (prefix)
append 1 if we should add suffix last (not before ext)
suffix Suffix
@note
The suffix is added before the extension of the file name prefixed with '-'.
The suffix is also converted to lower case and we transform
all not safe character, as we do with MySQL table names.
If suffix is an empty string, then we don't add any suffix.
This is to allow one to use this function also to generate old
file names without a prefix.
*/
void create_logfile_name_with_suffix(char *res_file_name, size_t length,
const char *info_file, bool append,
LEX_CSTRING *suffix)
{
char buff[MAX_CONNECTION_NAME+1],
res[MAX_CONNECTION_NAME * MAX_FILENAME_MBWIDTH+1], *p;
p= strmake(res_file_name, info_file, length);
/* If not empty suffix and there is place left for some part of the suffix */
if (suffix->length != 0 && p <= res_file_name + length -1)
{
const char *info_file_end= info_file + (p - res_file_name);
const char *ext= append ? info_file_end : fn_ext2(info_file);
size_t res_length, ext_pos, from_length;
uint errors;
/* Create null terminated string */
from_length= strmake(buff, suffix->str, suffix->length) - buff;
/* Convert to characters usable in a file name */
res_length= strconvert(system_charset_info, buff, from_length,
&my_charset_filename, res, sizeof(res), &errors);
ext_pos= (size_t) (ext - info_file);
length-= (suffix->length - ext_pos); /* Leave place for extension */
p= res_file_name + ext_pos;
*p++= '-'; /* Add separator */
p= strmake(p, res, MY_MIN((size_t) (length - (p - res_file_name)),
res_length));
/* Add back extension. We have checked above that there is space for it */
strmov(p, ext);
}
}
void copy_filter_setting(Rpl_filter* dst_filter, Rpl_filter* src_filter)
{
char buf[256];
String tmp(buf, sizeof(buf), &my_charset_bin);
dst_filter->get_do_db(&tmp);
if (tmp.is_empty())
{
src_filter->get_do_db(&tmp);
if (!tmp.is_empty())
dst_filter->set_do_db(tmp.ptr());
}
dst_filter->get_do_table(&tmp);
if (tmp.is_empty())
{
src_filter->get_do_table(&tmp);
if (!tmp.is_empty())
dst_filter->set_do_table(tmp.ptr());
}
dst_filter->get_ignore_db(&tmp);
if (tmp.is_empty())
{
src_filter->get_ignore_db(&tmp);
if (!tmp.is_empty())
dst_filter->set_ignore_db(tmp.ptr());
}
dst_filter->get_ignore_table(&tmp);
if (tmp.is_empty())
{
src_filter->get_ignore_table(&tmp);
if (!tmp.is_empty())
dst_filter->set_ignore_table(tmp.ptr());
}
dst_filter->get_wild_do_table(&tmp);
if (tmp.is_empty())
{
src_filter->get_wild_do_table(&tmp);
if (!tmp.is_empty())
dst_filter->set_wild_do_table(tmp.ptr());
}
dst_filter->get_wild_ignore_table(&tmp);
if (tmp.is_empty())
{
src_filter->get_wild_ignore_table(&tmp);
if (!tmp.is_empty())
dst_filter->set_wild_ignore_table(tmp.ptr());
}
if (dst_filter->rewrite_db_is_empty())
{
if (!src_filter->rewrite_db_is_empty())
dst_filter->copy_rewrite_db(src_filter);
}
}
Master_info_index::Master_info_index()
{
size_t filename_length, dir_length;
/*
Create the Master_info index file by prepending 'multi-' before
the master_info_file file name.
*/
fn_format(index_file_name, master_info_file, mysql_data_home,
"", MY_UNPACK_FILENAME);
filename_length= strlen(index_file_name) + 1; /* Count 0 byte */
dir_length= dirname_length(index_file_name);
bmove_upp((uchar*) index_file_name + filename_length + 6,
(uchar*) index_file_name + filename_length,
filename_length - dir_length);
memcpy(index_file_name + dir_length, "multi-", 6);
bzero((char*) &index_file, sizeof(index_file));
index_file.file= -1;
}
/**
Free all connection threads
This is done during early stages of shutdown
to give connection threads and slave threads time
to die before ~Master_info_index is called
*/
void Master_info_index::free_connections()
{
mysql_mutex_assert_owner(&LOCK_active_mi);
my_hash_reset(&master_info_hash);
}
/**
Free all connection threads and free structures
*/
Master_info_index::~Master_info_index()
{
my_hash_free(&master_info_hash);
end_io_cache(&index_file);
if (index_file.file >= 0)
my_close(index_file.file, MYF(MY_WME));
}
/* Load All Master_info from master.info.index File
* RETURN:
* 0 - All Success
* 1 - All Fail
* 2 - Some Success, Some Fail
*/
bool Master_info_index::init_all_master_info()
{
int thread_mask;
int err_num= 0, succ_num= 0; // The number of success read Master_info
char sign[MAX_CONNECTION_NAME+1];
File index_file_nr;
THD *thd;
DBUG_ENTER("init_all_master_info");
DBUG_ASSERT(master_info_index);
if ((index_file_nr= my_open(index_file_name,
O_RDWR | O_CREAT | O_BINARY ,
MYF(MY_WME | ME_ERROR_LOG))) < 0 ||
my_sync(index_file_nr, MYF(MY_WME)) ||
init_io_cache(&index_file, index_file_nr,
IO_SIZE, READ_CACHE,
my_seek(index_file_nr,0L,MY_SEEK_END,MYF(0)),
0, MYF(MY_WME | MY_WAIT_IF_FULL)))
{
if (index_file_nr >= 0)
my_close(index_file_nr,MYF(0));
sql_print_error("Creation of Master_info index file '%s' failed",
index_file_name);
DBUG_RETURN(1);
}
/* Initialize Master_info Hash Table */
if (my_hash_init(PSI_INSTRUMENT_ME, &master_info_hash, system_charset_info,
MAX_REPLICATION_THREAD, 0, 0,
(my_hash_get_key) get_key_master_info,
(my_hash_free_key)free_key_master_info, HASH_UNIQUE))
{
sql_print_error("Initializing Master_info hash table failed");
DBUG_RETURN(1);
}
thd= new THD(next_thread_id()); /* Needed by start_slave_threads */
thd->thread_stack= (char*) &thd;
thd->store_globals();
reinit_io_cache(&index_file, READ_CACHE, 0L,0,0);
while (!init_strvar_from_file(sign, sizeof(sign),
&index_file, NULL))
{
LEX_CSTRING connection_name;
Master_info *mi;
char buf_master_info_file[FN_REFLEN];
char buf_relay_log_info_file[FN_REFLEN];
connection_name.str= sign;
connection_name.length= strlen(sign);
if (!(mi= new Master_info(&connection_name, relay_log_recovery)) ||
mi->error())
{
delete mi;
goto error;
}
init_thread_mask(&thread_mask,mi,0 /*not inverse*/);
create_logfile_name_with_suffix(buf_master_info_file,
sizeof(buf_master_info_file),
master_info_file, 0,
&mi->cmp_connection_name);
create_logfile_name_with_suffix(buf_relay_log_info_file,
sizeof(buf_relay_log_info_file),
relay_log_info_file, 0,
&mi->cmp_connection_name);
if (global_system_variables.log_warnings > 1)
sql_print_information("Reading Master_info: '%s' Relay_info:'%s'",
buf_master_info_file, buf_relay_log_info_file);
mi->lock_slave_threads();
if (init_master_info(mi, buf_master_info_file, buf_relay_log_info_file,
0, thread_mask))
{
err_num++;
sql_print_error("Initialized Master_info from '%s' failed",
buf_master_info_file);
if (!master_info_index->get_master_info(&connection_name,
Sql_condition::WARN_LEVEL_NOTE))
{
/* Master_info is not in HASH; Add it */
if (master_info_index->add_master_info(mi, FALSE))
goto error;
succ_num++;
mi->unlock_slave_threads();
}
else
{
/* Master_info already in HASH */
sql_print_error(ER_THD_OR_DEFAULT(current_thd,
ER_CONNECTION_ALREADY_EXISTS),
(int) connection_name.length, connection_name.str,
(int) connection_name.length, connection_name.str);
mi->unlock_slave_threads();
delete mi;
}
continue;
}
else
{
/* Initialization of Master_info succeeded. Add it to HASH */
if (global_system_variables.log_warnings > 1)
sql_print_information("Initialized Master_info from '%s'",
buf_master_info_file);
if (master_info_index->get_master_info(&connection_name,
Sql_condition::WARN_LEVEL_NOTE))
{
/* Master_info was already registered */
sql_print_error(ER_THD_OR_DEFAULT(current_thd,
ER_CONNECTION_ALREADY_EXISTS),
(int) connection_name.length, connection_name.str,
(int) connection_name.length, connection_name.str);
mi->unlock_slave_threads();
delete mi;
continue;
}
/* Master_info was not registered; add it */
if (master_info_index->add_master_info(mi, FALSE))
goto error;
succ_num++;
if (!opt_skip_slave_start)
{
if (start_slave_threads(current_thd,
1 /* need mutex */,
1 /* wait for start*/,
mi,
buf_master_info_file,
buf_relay_log_info_file,
SLAVE_IO | SLAVE_SQL))
{
sql_print_error("Failed to create slave threads for connection '%.*s'",
(int) connection_name.length,
connection_name.str);
continue;
}
if (global_system_variables.log_warnings)
sql_print_information("Started replication for '%.*s'",
(int) connection_name.length,
connection_name.str);
}
mi->unlock_slave_threads();
}
}
thd->reset_globals();
delete thd;
if (!err_num) // No Error on read Master_info
{
if (global_system_variables.log_warnings > 2)
sql_print_information("Reading of all Master_info entries succeeded");
DBUG_RETURN(0);
}
if (succ_num) // Have some Error and some Success
sql_print_warning("Reading of some Master_info entries failed");
else
sql_print_error("Reading of all Master_info entries failed!");
DBUG_RETURN(1);
error:
thd->reset_globals();
delete thd;
DBUG_RETURN(1);
}
/* Write new master.info to master.info.index File */
bool Master_info_index::write_master_name_to_index_file(LEX_CSTRING *name,
bool do_sync)
{
DBUG_ASSERT(my_b_inited(&index_file) != 0);
DBUG_ENTER("write_master_name_to_index_file");
/* Don't write default slave to master_info.index */
if (name->length == 0)
DBUG_RETURN(0);
reinit_io_cache(&index_file, WRITE_CACHE,
my_b_filelength(&index_file), 0, 0);
if (my_b_write(&index_file, (uchar*) name->str, name->length) ||
my_b_write(&index_file, (uchar*) "\n", 1) ||
flush_io_cache(&index_file) ||
(do_sync && my_sync(index_file.file, MYF(MY_WME))))
{
sql_print_error("Write of new Master_info for '%.*s' to index file failed",
(int) name->length, name->str);
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
/**
Get Master_info for a connection and lock the object from deletion
@param
connection_name Connection name
warning WARN_LEVEL_NOTE -> Don't print anything
WARN_LEVEL_WARN -> Issue warning if not exists
WARN_LEVEL_ERROR-> Issue error if not exists
*/
Master_info *get_master_info(const LEX_CSTRING *connection_name,
Sql_condition::enum_warning_level warning)
{
Master_info *mi;
DBUG_ENTER("get_master_info");
/* Protect against inserts into hash */
mysql_mutex_lock(&LOCK_active_mi);
/*
The following can only be true during shutdown when slave has been killed
but some other threads are still trying to access slave statistics.
*/
if (unlikely(!master_info_index))
{
if (warning != Sql_condition::WARN_LEVEL_NOTE)
my_error(WARN_NO_MASTER_INFO,
MYF(warning == Sql_condition::WARN_LEVEL_WARN ?
ME_WARNING : 0),
(int) connection_name->length, connection_name->str);
mysql_mutex_unlock(&LOCK_active_mi);
DBUG_RETURN(0);
}
if ((mi= master_info_index->get_master_info(connection_name, warning)))
{
/*
We have to use sleep_lock here. If we would use LOCK_active_mi
then we would take locks in wrong order in Master_info::release()
*/
mysql_mutex_lock(&mi->sleep_lock);
mi->users++;
DBUG_PRINT("info",("users: %d", mi->users));
mysql_mutex_unlock(&mi->sleep_lock);
}
mysql_mutex_unlock(&LOCK_active_mi);
DBUG_RETURN(mi);
}
/**
Release master info.
Signals ~Master_info that it's now safe to delete it
*/
void Master_info::release()
{
mysql_mutex_lock(&sleep_lock);
if (!--users && killed)
{
/* Signal ~Master_info that it's ok to now free it */
mysql_cond_signal(&sleep_cond);
}
mysql_mutex_unlock(&sleep_lock);
}
/**
Get Master_info for a connection
@param
connection_name Connection name
warning WARN_LEVEL_NOTE -> Don't print anything
WARN_LEVEL_WARN -> Issue warning if not exists
WARN_LEVEL_ERROR-> Issue error if not exists
*/
Master_info *
Master_info_index::get_master_info(const LEX_CSTRING *connection_name,
Sql_condition::enum_warning_level warning)
{
Master_info *mi;
char buff[MAX_CONNECTION_NAME+1], *res;
size_t buff_length;
DBUG_ENTER("get_master_info");
DBUG_PRINT("enter",
("connection_name: '%.*s'", (int) connection_name->length,
connection_name->str));
/* Make name lower case for comparison */
res= strmake(buff, connection_name->str, connection_name->length);
my_casedn_str(system_charset_info, buff);
buff_length= (size_t) (res-buff);
mi= (Master_info*) my_hash_search(&master_info_hash,
(uchar*) buff, buff_length);
if (!mi && warning != Sql_condition::WARN_LEVEL_NOTE)
{
my_error(WARN_NO_MASTER_INFO,
MYF(warning == Sql_condition::WARN_LEVEL_WARN ? ME_WARNING :
0),
(int) connection_name->length,
connection_name->str);
}
DBUG_RETURN(mi);
}
/* Check Master_host & Master_port is duplicated or not */
bool Master_info_index::check_duplicate_master_info(LEX_CSTRING *name_arg,
const char *host,
uint port)
{
Master_info *mi;
DBUG_ENTER("check_duplicate_master_info");
mysql_mutex_assert_owner(&LOCK_active_mi);
DBUG_ASSERT(master_info_index);
/* Get full host and port name */
if ((mi= master_info_index->get_master_info(name_arg,
Sql_condition::WARN_LEVEL_NOTE)))
{
if (!host)
host= mi->host;
if (!port)
port= mi->port;
}
if (!host || !port)
DBUG_RETURN(FALSE); // Not comparable yet
for (uint i= 0; i < master_info_hash.records; ++i)
{
Master_info *tmp_mi;
tmp_mi= (Master_info *) my_hash_element(&master_info_hash, i);
if (tmp_mi == mi)
continue; // Current connection
if (!strcasecmp(host, tmp_mi->host) && port == tmp_mi->port)
{
my_error(ER_CONNECTION_ALREADY_EXISTS, MYF(0),
(int) name_arg->length,
name_arg->str,
(int) tmp_mi->connection_name.length,
tmp_mi->connection_name.str);
DBUG_RETURN(TRUE);
}
}
DBUG_RETURN(FALSE);
}
/* Add a Master_info class to Hash Table */
bool Master_info_index::add_master_info(Master_info *mi, bool write_to_file)
{
/*
We have to protect against shutdown to ensure we are not calling
my_hash_insert() while my_hash_free() is in progress
*/
if (unlikely(abort_loop) ||
!my_hash_insert(&master_info_hash, (uchar*) mi))
{
if (global_system_variables.log_warnings > 2)
sql_print_information("Added new Master_info '%.*s' to hash table",
(int) mi->connection_name.length,
mi->connection_name.str);
if (write_to_file)
return write_master_name_to_index_file(&mi->connection_name, 1);
return FALSE;
}
/* Impossible error (EOM) ? */
sql_print_error("Adding new entry '%.*s' to master_info failed",
(int) mi->connection_name.length,
mi->connection_name.str);
return TRUE;
}
/**
Remove a Master_info class From Hash Table
TODO: Change this to use my_rename() to make the file name creation
atomic
*/
bool Master_info_index::remove_master_info(Master_info *mi, bool clear_log_files)
{
char tmp_name[FN_REFLEN];
DBUG_ENTER("remove_master_info");
mysql_mutex_assert_owner(&LOCK_active_mi);
if (clear_log_files)
{
/* This code is only executed when change_master() failes to create a new master info */
// Delete any temporary relay log files that could have been created by change_master()
mi->rli.relay_log.reset_logs(current_thd, 0, (rpl_gtid*) 0, 0, 0);
/* Delete master-'connection'.info */
create_logfile_name_with_suffix(tmp_name,
sizeof(tmp_name),
master_info_file, 0,
&mi->cmp_connection_name);
my_delete(tmp_name, MYF(0));
/* Delete relay-log-'connection'.info */
create_logfile_name_with_suffix(tmp_name,
sizeof(tmp_name),
relay_log_info_file, 0,
&mi->cmp_connection_name);
my_delete(tmp_name, MYF(0));
}
// Delete Master_info and rewrite others to file
if (!my_hash_delete(&master_info_hash, (uchar*) mi))
{
File index_file_nr;
// Close IO_CACHE and FILE handler fisrt
end_io_cache(&index_file);
my_close(index_file.file, MYF(MY_WME));
// Reopen File and truncate it
if ((index_file_nr= my_open(index_file_name,
O_RDWR | O_CREAT | O_TRUNC | O_BINARY ,
MYF(MY_WME))) < 0 ||
init_io_cache(&index_file, index_file_nr,
IO_SIZE, WRITE_CACHE,
my_seek(index_file_nr,0L,MY_SEEK_END,MYF(0)),
0, MYF(MY_WME | MY_WAIT_IF_FULL)))
{
int error= my_errno;
if (index_file_nr >= 0)
my_close(index_file_nr,MYF(0));
sql_print_error("Create of Master Info Index file '%s' failed with "
"error: %M",
index_file_name, error);
DBUG_RETURN(TRUE);
}
// Rewrite Master_info.index
for (uint i= 0; i< master_info_hash.records; ++i)
{
Master_info *tmp_mi;
tmp_mi= (Master_info *) my_hash_element(&master_info_hash, i);
write_master_name_to_index_file(&tmp_mi->connection_name, 0);
}
if (my_sync(index_file_nr, MYF(MY_WME)))
DBUG_RETURN(TRUE);
}
DBUG_RETURN(FALSE);
}
/**
give_error_if_slave_running()
@param
already_locked 0 if we need to lock, 1 if we have LOCK_active_mi_locked
@return
TRUE If some slave is running. An error is printed
FALSE No slave is running
*/
bool give_error_if_slave_running(bool already_locked)
{
bool ret= 0;
DBUG_ENTER("give_error_if_slave_running");
if (!already_locked)
mysql_mutex_lock(&LOCK_active_mi);
if (!master_info_index)
{
my_error(ER_SERVER_SHUTDOWN, MYF(0));
ret= 1;
}
else
{
HASH *hash= &master_info_index->master_info_hash;
for (uint i= 0; i< hash->records; ++i)
{
Master_info *mi;
mi= (Master_info *) my_hash_element(hash, i);
if (mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN)
{
my_error(ER_SLAVE_MUST_STOP, MYF(0), (int) mi->connection_name.length,
mi->connection_name.str);
ret= 1;
break;
}
}
}
if (!already_locked)
mysql_mutex_unlock(&LOCK_active_mi);
DBUG_RETURN(ret);
}
/**
any_slave_sql_running()
@param
already_locked 0 if we need to lock, 1 if we have LOCK_active_mi_locked
@return
0 No Slave SQL thread is running
# Number of slave SQL thread running
Note that during shutdown we return 1. This is needed to ensure we
don't try to resize thread pool during shutdown as during shutdown
master_info_hash may be freeing the hash and during that time
hash entries can't be accessed.
*/
uint any_slave_sql_running(bool already_locked)
{
uint count= 0;
HASH *hash;
DBUG_ENTER("any_slave_sql_running");
if (!already_locked)
mysql_mutex_lock(&LOCK_active_mi);
else
mysql_mutex_assert_owner(&LOCK_active_mi);
if (unlikely(abort_loop || !master_info_index))
count= 1;
else
{
hash= &master_info_index->master_info_hash;
for (uint i= 0; i< hash->records; ++i)
{
Master_info *mi= (Master_info *)my_hash_element(hash, i);
if (mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN)
count++;
}
}
if (!already_locked)
mysql_mutex_unlock(&LOCK_active_mi);
DBUG_RETURN(count);
}
/**
Master_info_index::start_all_slaves()
Start all slaves that was not running.
@return
TRUE Error
FALSE Everything ok.
This code is written so that we don't keep LOCK_active_mi active
while we are starting a slave.
*/
bool Master_info_index::start_all_slaves(THD *thd)
{
bool result= FALSE;
DBUG_ENTER("start_all_slaves");
mysql_mutex_assert_owner(&LOCK_active_mi);
for (uint i= 0; i< master_info_hash.records; i++)
{
Master_info *mi;
mi= (Master_info *) my_hash_element(&master_info_hash, i);
mi->in_start_all_slaves= 0;
}
for (uint i= 0; i< master_info_hash.records; )
{
int error;
Master_info *mi;
mi= (Master_info *) my_hash_element(&master_info_hash, i);
/*
Try to start all slaves that are configured (host is defined)
and are not already running
*/
if (!((mi->slave_running == MYSQL_SLAVE_NOT_RUN ||
!mi->rli.slave_running) && *mi->host) ||
mi->in_start_all_slaves)
{
i++;
continue;
}
mi->in_start_all_slaves= 1;
mysql_mutex_lock(&mi->sleep_lock);
mi->users++; // Mark used
mysql_mutex_unlock(&mi->sleep_lock);
mysql_mutex_unlock(&LOCK_active_mi);
error= start_slave(thd, mi, 1);
mi->release();
mysql_mutex_lock(&LOCK_active_mi);
if (unlikely(error))
{
my_error(ER_CANT_START_STOP_SLAVE, MYF(0),
"START",
(int) mi->connection_name.length,
mi->connection_name.str);
result= 1;
if (error < 0) // fatal error
break;
}
else if (thd)
push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_SLAVE_STARTED, ER_THD(thd, ER_SLAVE_STARTED),
(int) mi->connection_name.length,
mi->connection_name.str);
/* Restart from first element as master_info_hash may have changed */
i= 0;
continue;
}
DBUG_RETURN(result);
}
/**
Master_info_index::stop_all_slaves()
Start all slaves that was not running.
@param thread id from user
@return
TRUE Error
FALSE Everything ok.
This code is written so that we don't keep LOCK_active_mi active
while we are stopping a slave.
*/
bool Master_info_index::stop_all_slaves(THD *thd)
{
bool result= FALSE;
DBUG_ENTER("stop_all_slaves");
mysql_mutex_assert_owner(&LOCK_active_mi);
DBUG_ASSERT(thd);
for (uint i= 0; i< master_info_hash.records; i++)
{
Master_info *mi;
mi= (Master_info *) my_hash_element(&master_info_hash, i);
mi->in_stop_all_slaves= 0;
}
for (uint i= 0; i< master_info_hash.records ;)
{
int error;
Master_info *mi;
mi= (Master_info *) my_hash_element(&master_info_hash, i);
if (!(mi->slave_running != MYSQL_SLAVE_NOT_RUN ||
mi->rli.slave_running) ||
mi->in_stop_all_slaves)
{
i++;
continue;
}
mi->in_stop_all_slaves= 1; // Protection for loops
mysql_mutex_lock(&mi->sleep_lock);
mi->users++; // Mark used
mysql_mutex_unlock(&mi->sleep_lock);
mysql_mutex_unlock(&LOCK_active_mi);
error= stop_slave(thd, mi, 1);
mi->release();
mysql_mutex_lock(&LOCK_active_mi);
if (unlikely(error))
{
my_error(ER_CANT_START_STOP_SLAVE, MYF(0),
"STOP",
(int) mi->connection_name.length,
mi->connection_name.str);
result= 1;
if (error < 0) // Fatal error
break;
}
else
push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_SLAVE_STOPPED, ER_THD(thd, ER_SLAVE_STOPPED),
(int) mi->connection_name.length,
mi->connection_name.str);
/* Restart from first element as master_info_hash may have changed */
i= 0;
continue;
}
DBUG_RETURN(result);
}
Domain_id_filter::Domain_id_filter() : m_filter(false)
{
for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
{
my_init_dynamic_array(PSI_INSTRUMENT_ME, &m_domain_ids[i], sizeof(ulong),
16, 16, MYF(0));
}
}
Domain_id_filter::~Domain_id_filter()
{
for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
{
delete_dynamic(&m_domain_ids[i]);
}
}
/**
Update m_filter flag for the current group by looking up its domain id in the
domain ids list. DO_DOMAIN_IDS list is only looked-up is both (do & ignore)
list are non-empty.
*/
void Domain_id_filter::do_filter(ulong domain_id)
{
DYNAMIC_ARRAY *do_domain_ids= &m_domain_ids[DO_DOMAIN_IDS];
DYNAMIC_ARRAY *ignore_domain_ids= &m_domain_ids[IGNORE_DOMAIN_IDS];
if (do_domain_ids->elements > 0)
{
if (likely(do_domain_ids->elements == 1))
m_filter= ((* (ulong *) dynamic_array_ptr(do_domain_ids, 0))
!= domain_id);
else
m_filter= (bsearch((const ulong *) &domain_id, do_domain_ids->buffer,
do_domain_ids->elements, sizeof(ulong),
change_master_id_cmp) == NULL);
}
else if (ignore_domain_ids->elements > 0)
{
if (likely(ignore_domain_ids->elements == 1))
m_filter= ((* (ulong *) dynamic_array_ptr(ignore_domain_ids, 0)) ==
domain_id);
else
m_filter= (bsearch((const ulong *) &domain_id, ignore_domain_ids->buffer,
ignore_domain_ids->elements, sizeof(ulong),
change_master_id_cmp) != NULL);
}
return;
}
/**
Reset m_filter. It should be called when IO thread receives COMMIT_EVENT or
XID_EVENT.
*/
void Domain_id_filter::reset_filter()
{
m_filter= false;
}
/**
Update the do/ignore domain id filter lists.
@param do_ids [IN] domain ids to be kept
@param ignore_ids [IN] domain ids to be filtered out
@param using_gtid [IN] use GTID?
@retval false Success
true Error
*/
bool Domain_id_filter::update_ids(DYNAMIC_ARRAY *do_ids,
DYNAMIC_ARRAY *ignore_ids,
bool using_gtid)
{
bool do_list_empty, ignore_list_empty;
if (do_ids)
{
do_list_empty= (do_ids->elements > 0) ? false : true;
} else {
do_list_empty= (m_domain_ids[DO_DOMAIN_IDS].elements > 0) ? false : true;
}
if (ignore_ids)
{
ignore_list_empty= (ignore_ids->elements > 0) ? false : true;
} else {
ignore_list_empty= (m_domain_ids[IGNORE_DOMAIN_IDS].elements > 0) ? false :
true;
}
if (!do_list_empty && !ignore_list_empty)
{
sql_print_error("Both DO_DOMAIN_IDS & IGNORE_DOMAIN_IDS lists can't be "
"non-empty at the same time");
return true;
}
if (using_gtid == Master_info::USE_GTID_NO &&
(!do_list_empty || !ignore_list_empty))
{
sql_print_error("DO_DOMAIN_IDS or IGNORE_DOMAIN_IDS lists can't be "
"non-empty in non-GTID mode (MASTER_USE_GTID=no)");
return true;
}
if (do_ids)
update_change_master_ids(do_ids, &m_domain_ids[DO_DOMAIN_IDS]);
if (ignore_ids)
update_change_master_ids(ignore_ids, &m_domain_ids[IGNORE_DOMAIN_IDS]);
m_filter= false;
return false;
}
/**
Serialize and store the ids from domain id lists into the thd's protocol
buffer.
@param thd [IN] thread handler
@retval void
*/
void Domain_id_filter::store_ids(THD *thd)
{
for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
{
prot_store_ids(thd, &m_domain_ids[i]);
}
}
/**
Initialize the given domain_id list (DYNAMIC_ARRAY) with the
space-separated list of numbers from the specified IO_CACHE where
the first number represents the total number of entries to follows.
@param f [IN] IO_CACHE file
@param type [IN] domain id list type
@retval false Success
true Error
*/
bool Domain_id_filter::init_ids(IO_CACHE *f, enum_list_type type)
{
return init_dynarray_intvar_from_file(&m_domain_ids[type], f);
}
/**
Return the elements of the give domain id list type as string.
@param type [IN] domain id list type
@retval a string buffer storing the total number
of elements followed by the individual
elements (space-separated) in the
specified list.
Note: Its caller's responsibility to free the returned string buffer.
*/
char *Domain_id_filter::as_string(enum_list_type type)
{
char *buf;
size_t sz;
DYNAMIC_ARRAY *ids= &m_domain_ids[type];
sz= (sizeof(ulong) * 3 + 1) * (1 + ids->elements);
if (!(buf= (char *) my_malloc(PSI_INSTRUMENT_ME, sz, MYF(MY_WME))))
return NULL;
// Store the total number of elements followed by the individual elements.
size_t cur_len= sprintf(buf, "%zu", ids->elements);
sz-= cur_len;
for (uint i= 0; i < ids->elements; i++)
{
ulong domain_id;
get_dynamic(ids, (void *) &domain_id, i);
cur_len+= my_snprintf(buf + cur_len, sz, " %lu", domain_id);
sz-= cur_len;
}
return buf;
}
void update_change_master_ids(DYNAMIC_ARRAY *new_ids, DYNAMIC_ARRAY *old_ids)
{
reset_dynamic(old_ids);
/* bsearch requires an ordered list. */
sort_dynamic(new_ids, change_master_id_cmp);
for (uint i= 0; i < new_ids->elements; i++)
{
ulong id;
get_dynamic(new_ids, (void *) &id, i);
if (bsearch((const ulong *) &id, old_ids->buffer, old_ids->elements,
sizeof(ulong), change_master_id_cmp) == NULL)
{
insert_dynamic(old_ids, (ulong *) &id);
}
}
return;
}
/**
Serialize and store the ids from the given ids DYNAMIC_ARRAY into the thd's
protocol buffer.
@param thd [IN] thread handler
@param ids [IN] ids list
@retval void
*/
void prot_store_ids(THD *thd, DYNAMIC_ARRAY *ids)
{
char buff[FN_REFLEN];
uint i, cur_len;
for (i= 0, buff[0]= 0, cur_len= 0; i < ids->elements; i++)
{
ulong id, len;
char dbuff[FN_REFLEN];
get_dynamic(ids, (void *) &id, i);
len= sprintf(dbuff, (i == 0 ? "%lu" : ", %lu"), id);
if (cur_len + len + 4 > FN_REFLEN)
{
/*
break the loop whenever remained space could not fit
ellipses on the next cycle
*/
cur_len+= sprintf(dbuff + cur_len, "...");
break;
}
cur_len+= sprintf(buff + cur_len, "%s", dbuff);
}
thd->protocol->store(buff, cur_len, &my_charset_bin);
return;
}
bool Master_info_index::flush_all_relay_logs()
{
DBUG_ENTER("flush_all_relay_logs");
bool result= false;
int error= 0;
mysql_mutex_lock(&LOCK_active_mi);
for (uint i= 0; i< master_info_hash.records; i++)
{
Master_info *mi;
mi= (Master_info *) my_hash_element(&master_info_hash, i);
mi->in_flush_all_relay_logs= 0;
}
for (uint i=0; i < master_info_hash.records;)
{
Master_info *mi;
mi= (Master_info *)my_hash_element(&master_info_hash, i);
DBUG_ASSERT(mi);
if (mi->in_flush_all_relay_logs)
{
i++;
continue;
}
mi->in_flush_all_relay_logs= 1;
mysql_mutex_lock(&mi->sleep_lock);
mi->users++; // Mark used
mysql_mutex_unlock(&mi->sleep_lock);
mysql_mutex_unlock(&LOCK_active_mi);
mysql_mutex_lock(&mi->data_lock);
error= rotate_relay_log(mi);
mysql_mutex_unlock(&mi->data_lock);
mi->release();
mysql_mutex_lock(&LOCK_active_mi);
if (unlikely(error))
{
result= true;
break;
}
/* Restart from first element as master_info_hash may have changed */
i= 0;
continue;
}
mysql_mutex_unlock(&LOCK_active_mi);
DBUG_RETURN(result);
}
#endif /* HAVE_REPLICATION */
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