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/* Copyright (c) 2006, 2012, Oracle and/or its affiliates.
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 */
#ifndef RPL_MI_H
#define RPL_MI_H
#ifdef HAVE_REPLICATION
#include "rpl_rli.h"
#include "rpl_reporting.h"
#include "my_sys.h"
#include "rpl_filter.h"
#include "keycaches.h"
typedef struct st_mysql MYSQL;
/*****************************************************************************
Replication IO Thread
Master_info contains:
- information about how to connect to a master
- current master log name
- current master log offset
- misc control variables
Master_info is initialized once from the master.info file if such
exists. Otherwise, data members corresponding to master.info fields
are initialized with defaults specified by master-* options. The
initialization is done through init_master_info() call.
The format of master.info file:
log_name
log_pos
master_host
master_user
master_pass
master_port
master_connect_retry
To write out the contents of master.info file to disk ( needed every
time we read and queue data from the master ), a call to
flush_master_info() is required.
To clean up, call end_master_info()
*****************************************************************************/
class Master_info : public Slave_reporting_capability
{
public:
Master_info(LEX_STRING *connection_name, bool is_slave_recovery);
~Master_info();
bool shall_ignore_server_id(ulong s_id);
void clear_in_memory_info(bool all);
bool error()
{
/* If malloc() in initialization failed */
return connection_name.str == 0;
}
/* the variables below are needed because we can change masters on the fly */
char master_log_name[FN_REFLEN+6]; /* Room for multi-*/
char host[HOSTNAME_LENGTH*SYSTEM_CHARSET_MBMAXLEN+1];
char user[USERNAME_LENGTH*+1];
char password[MAX_PASSWORD_LENGTH*SYSTEM_CHARSET_MBMAXLEN+1];
LEX_STRING connection_name; /* User supplied connection name */
LEX_STRING cmp_connection_name; /* Connection name in lower case */
bool ssl; // enables use of SSL connection if true
char ssl_ca[FN_REFLEN], ssl_capath[FN_REFLEN], ssl_cert[FN_REFLEN];
char ssl_cipher[FN_REFLEN], ssl_key[FN_REFLEN];
char ssl_crl[FN_REFLEN], ssl_crlpath[FN_REFLEN];
bool ssl_verify_server_cert;
my_off_t master_log_pos;
File fd; // we keep the file open, so we need to remember the file pointer
IO_CACHE file;
mysql_mutex_t data_lock, run_lock, sleep_lock;
mysql_cond_t data_cond, start_cond, stop_cond, sleep_cond;
THD *io_thd;
MYSQL* mysql;
uint32 file_id; /* for 3.23 load data infile */
Relay_log_info rli;
uint port;
Rpl_filter* rpl_filter; /* Each replication can set its filter rule*/
/*
to hold checksum alg in use until IO thread has received FD.
Initialized to novalue, then set to the queried from master
@@global.binlog_checksum and deactivated once FD has been received.
*/
uint8 checksum_alg_before_fd;
uint connect_retry;
#ifndef DBUG_OFF
int events_till_disconnect;
#endif
bool inited;
volatile bool abort_slave;
volatile uint slave_running;
volatile ulong slave_run_id;
/*
The difference in seconds between the clock of the master and the clock of
the slave (second - first). It must be signed as it may be <0 or >0.
clock_diff_with_master is computed when the I/O thread starts; for this the
I/O thread does a SELECT UNIX_TIMESTAMP() on the master.
"how late the slave is compared to the master" is computed like this:
clock_of_slave - last_timestamp_executed_by_SQL_thread - clock_diff_with_master
*/
long clock_diff_with_master;
/*
Keeps track of the number of events before fsyncing.
The option --sync-master-info determines how many
events should happen before fsyncing.
*/
uint sync_counter;
float heartbeat_period; // interface with CHANGE MASTER or master.info
ulonglong received_heartbeats; // counter of received heartbeat events
DYNAMIC_ARRAY ignore_server_ids;
ulong master_id;
/*
True if slave position is set using GTID state rather than old-style
file/offset binlog position.
*/
bool using_gtid;
};
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);
void end_master_info(Master_info* mi);
int flush_master_info(Master_info* mi,
bool flush_relay_log_cache,
bool need_lock_relay_log);
int change_master_server_id_cmp(ulong *id1, ulong *id2);
void copy_filter_setting(Rpl_filter* dst_filter, Rpl_filter* src_filter);
/*
Multi master are handled trough this struct.
Changes to this needs to be protected by LOCK_active_mi;
*/
class Master_info_index
{
private:
IO_CACHE index_file;
char index_file_name[FN_REFLEN];
public:
Master_info_index();
~Master_info_index();
HASH master_info_hash;
bool init_all_master_info();
bool write_master_name_to_index_file(LEX_STRING *connection_name,
bool do_sync);
bool check_duplicate_master_info(LEX_STRING *connection_name,
const char *host, uint port);
bool add_master_info(Master_info *mi, bool write_to_file);
bool remove_master_info(LEX_STRING *connection_name);
Master_info *get_master_info(LEX_STRING *connection_name,
MYSQL_ERROR::enum_warning_level warning);
bool give_error_if_slave_running();
bool start_all_slaves(THD *thd);
bool stop_all_slaves(THD *thd);
};
bool check_master_connection_name(LEX_STRING *name);
void create_logfile_name_with_suffix(char *res_file_name, size_t length,
const char *info_file,
bool append,
LEX_STRING *suffix);
uchar *get_key_master_info(Master_info *mi, size_t *length,
my_bool not_used __attribute__((unused)));
void free_key_master_info(Master_info *mi);
#endif /* HAVE_REPLICATION */
#endif /* RPL_MI_H */
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