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mariadb/sql/rpl_mi.cc
Sergey Vojtovich d12c7adf71 MDEV-5314 - Compiling fails on OSX using clang 
This is port of fix for MySQL BUG#17647863.

revno: 5572
revision-id: jon.hauglid@oracle.com-20131030232243-b0pw98oy72uka2sj
committer: Jon Olav Hauglid <jon.hauglid@oracle.com>
timestamp: Thu 2013-10-31 00:22:43 +0100
message:
  Bug#17647863: MYSQL DOES NOT COMPILE ON OSX 10.9 GM

  Rename test() macro to MY_TEST() to avoid conflict with libc++.
2014-02-19 14:05:15 +04:00

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/* Copyright (c) 2006, 2012, Oracle and/or its affiliates.
Copyright (c) 2010, 2011, Monty Program Ab
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 02110-1301 USA */
#include <my_global.h> // For HAVE_REPLICATION
#include "sql_priv.h"
#include <my_dir.h>
#include "unireg.h" // REQUIRED by other includes
#include "rpl_mi.h"
#include "slave.h" // SLAVE_MAX_HEARTBEAT_PERIOD
#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_STRING *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(0), slave_run_id(0), sync_counter(0),
heartbeat_period(0), received_heartbeats(0), master_id(0),
using_gtid(USE_GTID_NO), events_queued_since_last_gtid(0),
gtid_reconnect_event_skip_count(0), gtid_event_seen(false)
{
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= (char*) my_malloc(connection_name_arg->length*2+2,
MYF(MY_WME))))
{
cmp_connection_name.str= (connection_name.str +
connection_name_arg->length+1);
strmake(connection_name.str, connection_name_arg->str,
connection_name.length);
memcpy(cmp_connection_name.str, connection_name_arg->str,
connection_name.length+1);
my_casedn_str(system_charset_info, cmp_connection_name.str);
}
/* When MySQL restarted, all Rpl_filter settings which aren't in the my.cnf
* will lose. So if you want a setting will not lose after restarting, 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);
my_init_dynamic_array(&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_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);
}
Master_info::~Master_info()
{
rpl_filters.delete_element(connection_name.str, connection_name.length,
(void (*)(const char*, uchar*)) free_rpl_filter);
my_free(connection_name.str);
delete_dynamic(&ignore_server_ids);
mysql_mutex_destroy(&run_lock);
mysql_mutex_destroy(&data_lock);
mysql_mutex_destroy(&sleep_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
*/
int change_master_server_id_cmp(ulong *id1, ulong *id2)
{
return *id1 < *id2? -1 : (*id1 > *id2? 1 : 0);
}
/**
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),
(int (*) (const void*, const void*)) change_master_server_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;
}
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;
/* 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.
Ignore unknown lines, to facilitate downgrades.
*/
while (!init_strvar_from_file(buf, sizeof(buf), &mi->file, 0))
{
if (0 == strncmp(buf, STRING_WITH_LEN("using_gtid=")))
{
int val= atoi(buf + sizeof("using_gtid"));
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;
}
}
}
}
#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= 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 (init_relay_log_info(&mi->rli, 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 ((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((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);
ulong cur_len= sprintf(ignore_server_ids_buf, "%u",
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);
}
}
/*
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[sizeof(mi->heartbeat_period) * 4]; // buffer to suffice always
sprintf(heartbeat_buf, "%.3f", mi->heartbeat_period);
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",
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);
my_free(ignore_server_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;
}
DBUG_RETURN(-err);
}
void end_master_info(Master_info* mi)
{
DBUG_ENTER("end_master_info");
if (!mi->inited)
DBUG_VOID_RETURN;
end_relay_log_info(&mi->rli);
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;
}
void free_key_master_info(Master_info *mi)
{
DBUG_ENTER("free_key_master_info");
terminate_slave_threads(mi,SLAVE_FORCE_ALL);
end_master_info(mi);
delete 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_STRING *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_STRING *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));
}
Master_info_index::~Master_info_index()
{
/* This will close connection for all objects in the cache */
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;
DBUG_ENTER("init_all_master_info");
if ((index_file_nr= my_open(index_file_name,
O_RDWR | O_CREAT | O_BINARY ,
MYF(MY_WME | ME_NOREFRESH))) < 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(&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);
}
reinit_io_cache(&index_file, READ_CACHE, 0L,0,0);
while (!init_strvar_from_file(sign, sizeof(sign),
&index_file, NULL))
{
LEX_STRING 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;
DBUG_RETURN(1);
}
lock_slave_threads(mi);
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);
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))
return 1;
succ_num++;
unlock_slave_threads(mi);
}
else
{
/* Master_info already in HASH */
sql_print_error(ER(ER_CONNECTION_ALREADY_EXISTS),
(int) connection_name.length, connection_name.str);
unlock_slave_threads(mi);
delete mi;
}
continue;
}
else
{
/* Initialization of Master_info succeded. 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(ER_CONNECTION_ALREADY_EXISTS),
(int) connection_name.length, connection_name.str);
unlock_slave_threads(mi);
delete mi;
continue;
}
/* Master_info was not registered; add it */
if (master_info_index->add_master_info(mi, FALSE))
return 1;
succ_num++;
unlock_slave_threads(mi);
if (!opt_skip_slave_start)
{
if (start_slave_threads(1 /* need mutex */,
0 /* no 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);
}
}
}
if (!err_num) // No Error on read Master_info
{
if (global_system_variables.log_warnings > 1)
sql_print_information("Reading of all Master_info entries succeded");
DBUG_RETURN(0);
}
else if (succ_num) // Have some Error and some Success
{
sql_print_warning("Reading of some Master_info entries failed");
DBUG_RETURN(2);
}
else // All failed
{
sql_print_error("Reading of all Master_info entries failed!");
DBUG_RETURN(1);
}
}
/* Write new master.info to master.info.index File */
bool Master_info_index::write_master_name_to_index_file(LEX_STRING *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
@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(LEX_STRING *connection_name,
Sql_condition::enum_warning_level warning)
{
Master_info *mi;
char buff[MAX_CONNECTION_NAME+1], *res;
uint 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_JUST_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_STRING *name_arg,
const char *host,
uint port)
{
Master_info *mi;
DBUG_ENTER("check_duplicate_master_info");
/* 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)
{
if (!my_hash_insert(&master_info_hash, (uchar*) mi))
{
if (global_system_variables.log_warnings > 1)
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(LEX_STRING *name)
{
Master_info* mi;
DBUG_ENTER("remove_master_info");
if ((mi= get_master_info(name, Sql_condition::WARN_LEVEL_WARN)))
{
// 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);
}
my_sync(index_file_nr, MYF(MY_WME));
}
}
DBUG_RETURN(FALSE);
}
/**
Master_info_index::give_error_if_slave_running()
@return
TRUE If some slave is running. An error is printed
FALSE No slave is running
*/
bool Master_info_index::give_error_if_slave_running()
{
DBUG_ENTER("warn_if_slave_running");
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);
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);
DBUG_RETURN(TRUE);
}
}
DBUG_RETURN(FALSE);
}
/**
Master_info_index::start_all_slaves()
Start all slaves that was not running.
@return
TRUE Error
FALSE Everything ok.
*/
bool Master_info_index::start_all_slaves(THD *thd)
{
bool result= FALSE;
DBUG_ENTER("warn_if_slave_running");
mysql_mutex_assert_owner(&LOCK_active_mi);
for (uint i= 0; i< master_info_hash.records; ++i)
{
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_RUN_CONNECT ||
!mi->rli.slave_running) && *mi->host)
{
if ((error= start_slave(thd, mi, 1)))
{
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
push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
ER_SLAVE_STARTED, ER(ER_SLAVE_STARTED),
(int) mi->connection_name.length,
mi->connection_name.str);
}
}
DBUG_RETURN(result);
}
/**
Master_info_index::stop_all_slaves()
Start all slaves that was not running.
@return
TRUE Error
FALSE Everything ok.
*/
bool Master_info_index::stop_all_slaves(THD *thd)
{
bool result= FALSE;
DBUG_ENTER("warn_if_slave_running");
mysql_mutex_assert_owner(&LOCK_active_mi);
for (uint i= 0; i< master_info_hash.records; ++i)
{
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))
{
if ((error= stop_slave(thd, mi, 1)))
{
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(ER_SLAVE_STOPPED),
(int) mi->connection_name.length,
mi->connection_name.str);
}
}
DBUG_RETURN(result);
}
#endif /* HAVE_REPLICATION */
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