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mariadb/sql/log.cc
Marko Mäkelä 8f643e2063 Merge 10.1 into 10.2
2017-05-23 11:09:47 +03:00

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/* Copyright (c) 2000, 2016, Oracle and/or its affiliates.
Copyright (c) 2009, 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 Street, Fifth Floor, Boston, MA 02110-1301, USA */
/**
@file
@brief
logging of commands
@todo
Abort logging when we get an error in reading or writing log files
*/
#include <my_global.h> /* NO_EMBEDDED_ACCESS_CHECKS */
#include "sql_priv.h"
#include "log.h"
#include "sql_base.h" // open_log_table
#include "sql_repl.h"
#include "sql_delete.h" // mysql_truncate
#include "sql_parse.h" // command_name
#include "sql_time.h" // calc_time_from_sec, my_time_compare
#include "tztime.h" // my_tz_OFFSET0, struct Time_zone
#include "sql_acl.h" // SUPER_ACL
#include "log_event.h" // Query_log_event
#include "rpl_filter.h"
#include "rpl_rli.h"
#include "sql_audit.h"
#include "log_slow.h"
#include "mysqld.h"
#include <my_dir.h>
#include <stdarg.h>
#include <m_ctype.h> // For test_if_number
#ifdef _WIN32
#include "message.h"
#endif
#include "sql_plugin.h"
#include "rpl_handler.h"
#include "debug_sync.h"
#include "sql_show.h"
#include "my_pthread.h"
#include "wsrep_mysqld.h"
/* max size of the log message */
#define MAX_LOG_BUFFER_SIZE 1024
#define MAX_TIME_SIZE 32
#define MY_OFF_T_UNDEF (~(my_off_t)0UL)
#define FLAGSTR(V,F) ((V)&(F)?#F" ":"")
handlerton *binlog_hton;
LOGGER logger;
const char *log_bin_index= 0;
const char *log_bin_basename= 0;
MYSQL_BIN_LOG mysql_bin_log(&sync_binlog_period);
static bool test_if_number(const char *str,
ulong *res, bool allow_wildcards);
static int binlog_init(void *p);
static int binlog_close_connection(handlerton *hton, THD *thd);
static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv);
static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv);
static bool binlog_savepoint_rollback_can_release_mdl(handlerton *hton,
THD *thd);
static int binlog_commit(handlerton *hton, THD *thd, bool all);
static int binlog_rollback(handlerton *hton, THD *thd, bool all);
static int binlog_prepare(handlerton *hton, THD *thd, bool all);
static int binlog_start_consistent_snapshot(handlerton *hton, THD *thd);
static LEX_STRING const write_error_msg=
{ C_STRING_WITH_LEN("error writing to the binary log") };
static my_bool opt_optimize_thread_scheduling= TRUE;
ulong binlog_checksum_options;
#ifndef DBUG_OFF
ulong opt_binlog_dbug_fsync_sleep= 0;
#endif
mysql_mutex_t LOCK_prepare_ordered;
mysql_cond_t COND_prepare_ordered;
mysql_mutex_t LOCK_after_binlog_sync;
mysql_mutex_t LOCK_commit_ordered;
static ulonglong binlog_status_var_num_commits;
static ulonglong binlog_status_var_num_group_commits;
static ulonglong binlog_status_group_commit_trigger_count;
static ulonglong binlog_status_group_commit_trigger_lock_wait;
static ulonglong binlog_status_group_commit_trigger_timeout;
static char binlog_snapshot_file[FN_REFLEN];
static ulonglong binlog_snapshot_position;
static SHOW_VAR binlog_status_vars_detail[]=
{
{"commits",
(char *)&binlog_status_var_num_commits, SHOW_LONGLONG},
{"group_commits",
(char *)&binlog_status_var_num_group_commits, SHOW_LONGLONG},
{"group_commit_trigger_count",
(char *)&binlog_status_group_commit_trigger_count, SHOW_LONGLONG},
{"group_commit_trigger_lock_wait",
(char *)&binlog_status_group_commit_trigger_lock_wait, SHOW_LONGLONG},
{"group_commit_trigger_timeout",
(char *)&binlog_status_group_commit_trigger_timeout, SHOW_LONGLONG},
{"snapshot_file",
(char *)&binlog_snapshot_file, SHOW_CHAR},
{"snapshot_position",
(char *)&binlog_snapshot_position, SHOW_LONGLONG},
{NullS, NullS, SHOW_LONG}
};
/*
Variables for the binlog background thread.
Protected by the MYSQL_BIN_LOG::LOCK_binlog_background_thread mutex.
*/
static bool binlog_background_thread_started= false;
static bool binlog_background_thread_stop= false;
static MYSQL_BIN_LOG::xid_count_per_binlog *
binlog_background_thread_queue= NULL;
static bool start_binlog_background_thread();
static rpl_binlog_state rpl_global_gtid_binlog_state;
void setup_log_handling()
{
rpl_global_gtid_binlog_state.init();
}
/**
purge logs, master and slave sides both, related error code
convertor.
Called from @c purge_error_message(), @c MYSQL_BIN_LOG::reset_logs()
@param res an internal to purging routines error code
@return the user level error code ER_*
*/
uint purge_log_get_error_code(int res)
{
uint errcode= 0;
switch (res) {
case 0: break;
case LOG_INFO_EOF: errcode= ER_UNKNOWN_TARGET_BINLOG; break;
case LOG_INFO_IO: errcode= ER_IO_ERR_LOG_INDEX_READ; break;
case LOG_INFO_INVALID:errcode= ER_BINLOG_PURGE_PROHIBITED; break;
case LOG_INFO_SEEK: errcode= ER_FSEEK_FAIL; break;
case LOG_INFO_MEM: errcode= ER_OUT_OF_RESOURCES; break;
case LOG_INFO_FATAL: errcode= ER_BINLOG_PURGE_FATAL_ERR; break;
case LOG_INFO_IN_USE: errcode= ER_LOG_IN_USE; break;
case LOG_INFO_EMFILE: errcode= ER_BINLOG_PURGE_EMFILE; break;
default: errcode= ER_LOG_PURGE_UNKNOWN_ERR; break;
}
return errcode;
}
/**
Silence all errors and warnings reported when performing a write
to a log table.
Errors and warnings are not reported to the client or SQL exception
handlers, so that the presence of logging does not interfere and affect
the logic of an application.
*/
class Silence_log_table_errors : public Internal_error_handler
{
char m_message[MYSQL_ERRMSG_SIZE];
public:
Silence_log_table_errors()
{
m_message[0]= '\0';
}
virtual ~Silence_log_table_errors() {}
virtual bool handle_condition(THD *thd,
uint sql_errno,
const char* sql_state,
Sql_condition::enum_warning_level *level,
const char* msg,
Sql_condition ** cond_hdl);
const char *message() const { return m_message; }
};
bool
Silence_log_table_errors::handle_condition(THD *,
uint,
const char*,
Sql_condition::enum_warning_level*,
const char* msg,
Sql_condition ** cond_hdl)
{
*cond_hdl= NULL;
strmake_buf(m_message, msg);
return TRUE;
}
sql_print_message_func sql_print_message_handlers[3] =
{
sql_print_information,
sql_print_warning,
sql_print_error
};
/**
Create the name of the log file
@param[OUT] out a pointer to a new allocated name will go there
@param[IN] log_ext The extension for the file (e.g .log)
@param[IN] once whether to use malloc_once or a normal malloc.
*/
void make_default_log_name(char **out, const char* log_ext, bool once)
{
char buff[FN_REFLEN+10];
fn_format(buff, opt_log_basename, "", log_ext, MYF(MY_REPLACE_EXT));
if (once)
*out= my_once_strdup(buff, MYF(MY_WME));
else
{
my_free(*out);
*out= my_strdup(buff, MYF(MY_WME));
}
}
/*
Helper classes to store non-transactional and transactional data
before copying it to the binary log.
*/
class binlog_cache_data
{
public:
binlog_cache_data(): m_pending(0), before_stmt_pos(MY_OFF_T_UNDEF),
incident(FALSE), changes_to_non_trans_temp_table_flag(FALSE),
saved_max_binlog_cache_size(0), ptr_binlog_cache_use(0),
ptr_binlog_cache_disk_use(0)
{ }
~binlog_cache_data()
{
DBUG_ASSERT(empty());
close_cached_file(&cache_log);
}
bool empty() const
{
return pending() == NULL && my_b_tell(&cache_log) == 0;
}
Rows_log_event *pending() const
{
return m_pending;
}
void set_pending(Rows_log_event *const pending_arg)
{
m_pending= pending_arg;
}
void set_incident(void)
{
incident= TRUE;
}
bool has_incident(void)
{
return(incident);
}
void set_changes_to_non_trans_temp_table()
{
changes_to_non_trans_temp_table_flag= TRUE;
}
bool changes_to_non_trans_temp_table()
{
return (changes_to_non_trans_temp_table_flag);
}
void reset()
{
compute_statistics();
truncate(0);
if(cache_log.file != -1)
my_chsize(cache_log.file, 0, 0, MYF(MY_WME));
changes_to_non_trans_temp_table_flag= FALSE;
incident= FALSE;
before_stmt_pos= MY_OFF_T_UNDEF;
/*
The truncate function calls reinit_io_cache that calls
my_b_flush_io_cache which may increase disk_writes. This breaks
the disk_writes use by the binary log which aims to compute the
ratio between in-memory cache usage and disk cache usage. To
avoid this undesirable behavior, we reset the variable after
truncating the cache.
*/
cache_log.disk_writes= 0;
DBUG_ASSERT(empty());
}
my_off_t get_byte_position() const
{
return my_b_tell(&cache_log);
}
my_off_t get_prev_position()
{
return(before_stmt_pos);
}
void set_prev_position(my_off_t pos)
{
before_stmt_pos= pos;
}
void restore_prev_position()
{
truncate(before_stmt_pos);
}
void restore_savepoint(my_off_t pos)
{
truncate(pos);
if (pos < before_stmt_pos)
before_stmt_pos= MY_OFF_T_UNDEF;
}
void set_binlog_cache_info(my_off_t param_max_binlog_cache_size,
ulong *param_ptr_binlog_cache_use,
ulong *param_ptr_binlog_cache_disk_use)
{
/*
The assertions guarantee that the set_binlog_cache_info is
called just once and information passed as parameters are
never zero.
This is done while calling the constructor binlog_cache_mngr.
We cannot set informaton in the constructor binlog_cache_data
because the space for binlog_cache_mngr is allocated through
a placement new.
In the future, we can refactor this and change it to avoid
the set_binlog_info.
*/
DBUG_ASSERT(saved_max_binlog_cache_size == 0 &&
param_max_binlog_cache_size != 0 &&
ptr_binlog_cache_use == 0 &&
param_ptr_binlog_cache_use != 0 &&
ptr_binlog_cache_disk_use == 0 &&
param_ptr_binlog_cache_disk_use != 0);
saved_max_binlog_cache_size= param_max_binlog_cache_size;
ptr_binlog_cache_use= param_ptr_binlog_cache_use;
ptr_binlog_cache_disk_use= param_ptr_binlog_cache_disk_use;
cache_log.end_of_file= saved_max_binlog_cache_size;
}
/*
Cache to store data before copying it to the binary log.
*/
IO_CACHE cache_log;
private:
/*
Pending binrows event. This event is the event where the rows are currently
written.
*/
Rows_log_event *m_pending;
/*
Binlog position before the start of the current statement.
*/
my_off_t before_stmt_pos;
/*
This indicates that some events did not get into the cache and most likely
it is corrupted.
*/
bool incident;
/*
This flag indicates if the cache has changes to temporary tables.
@TODO This a temporary fix and should be removed after BUG#54562.
*/
bool changes_to_non_trans_temp_table_flag;
/**
This function computes binlog cache and disk usage.
*/
void compute_statistics()
{
if (!empty())
{
statistic_increment(*ptr_binlog_cache_use, &LOCK_status);
if (cache_log.disk_writes != 0)
statistic_increment(*ptr_binlog_cache_disk_use, &LOCK_status);
}
}
/*
Stores the values of maximum size of the cache allowed when this cache
is configured. This corresponds to either
. max_binlog_cache_size or max_binlog_stmt_cache_size.
*/
my_off_t saved_max_binlog_cache_size;
/*
Stores a pointer to the status variable that keeps track of the in-memory
cache usage. This corresponds to either
. binlog_cache_use or binlog_stmt_cache_use.
*/
ulong *ptr_binlog_cache_use;
/*
Stores a pointer to the status variable that keeps track of the disk
cache usage. This corresponds to either
. binlog_cache_disk_use or binlog_stmt_cache_disk_use.
*/
ulong *ptr_binlog_cache_disk_use;
/*
It truncates the cache to a certain position. This includes deleting the
pending event.
*/
void truncate(my_off_t pos)
{
DBUG_PRINT("info", ("truncating to position %lu", (ulong) pos));
if (pending())
{
delete pending();
set_pending(0);
}
reinit_io_cache(&cache_log, WRITE_CACHE, pos, 0, 0);
cache_log.end_of_file= saved_max_binlog_cache_size;
}
binlog_cache_data& operator=(const binlog_cache_data& info);
binlog_cache_data(const binlog_cache_data& info);
};
class binlog_cache_mngr {
public:
binlog_cache_mngr(my_off_t param_max_binlog_stmt_cache_size,
my_off_t param_max_binlog_cache_size,
ulong *param_ptr_binlog_stmt_cache_use,
ulong *param_ptr_binlog_stmt_cache_disk_use,
ulong *param_ptr_binlog_cache_use,
ulong *param_ptr_binlog_cache_disk_use)
: last_commit_pos_offset(0), using_xa(FALSE), xa_xid(0)
{
stmt_cache.set_binlog_cache_info(param_max_binlog_stmt_cache_size,
param_ptr_binlog_stmt_cache_use,
param_ptr_binlog_stmt_cache_disk_use);
trx_cache.set_binlog_cache_info(param_max_binlog_cache_size,
param_ptr_binlog_cache_use,
param_ptr_binlog_cache_disk_use);
last_commit_pos_file[0]= 0;
}
void reset(bool do_stmt, bool do_trx)
{
if (do_stmt)
stmt_cache.reset();
if (do_trx)
{
trx_cache.reset();
using_xa= FALSE;
last_commit_pos_file[0]= 0;
last_commit_pos_offset= 0;
}
}
binlog_cache_data* get_binlog_cache_data(bool is_transactional)
{
return (is_transactional ? &trx_cache : &stmt_cache);
}
IO_CACHE* get_binlog_cache_log(bool is_transactional)
{
return (is_transactional ? &trx_cache.cache_log : &stmt_cache.cache_log);
}
binlog_cache_data stmt_cache;
binlog_cache_data trx_cache;
/*
Binlog position for current transaction.
For START TRANSACTION WITH CONSISTENT SNAPSHOT, this is the binlog
position corresponding to the snapshot taken. During (and after) commit,
this is set to the binlog position corresponding to just after the
commit (so storage engines can store it in their transaction log).
*/
char last_commit_pos_file[FN_REFLEN];
my_off_t last_commit_pos_offset;
/*
Flag set true if this transaction is committed with log_xid() as part of
XA, false if not.
*/
bool using_xa;
my_xid xa_xid;
bool need_unlog;
/*
Id of binlog that transaction was written to; only needed if need_unlog is
true.
*/
ulong binlog_id;
/* Set if we get an error during commit that must be returned from unlog(). */
bool delayed_error;
private:
binlog_cache_mngr& operator=(const binlog_cache_mngr& info);
binlog_cache_mngr(const binlog_cache_mngr& info);
};
bool LOGGER::is_log_table_enabled(uint log_table_type)
{
switch (log_table_type) {
case QUERY_LOG_SLOW:
return (table_log_handler != NULL) && global_system_variables.sql_log_slow;
case QUERY_LOG_GENERAL:
return (table_log_handler != NULL) && opt_log ;
default:
DBUG_ASSERT(0);
return FALSE; /* make compiler happy */
}
}
/**
Check if a given table is opened log table
@param table Table to check
@param check_if_opened Only fail if it's a log table in use
@param error_msg String to put in error message if not ok.
No error message if 0
@return 0 ok
@return # Type of log file
*/
int check_if_log_table(const TABLE_LIST *table,
bool check_if_opened,
const char *error_msg)
{
int result= 0;
if (table->db_length == 5 &&
!my_strcasecmp(table_alias_charset, table->db, "mysql"))
{
const char *table_name= table->table_name;
if (table->table_name_length == 11 &&
!my_strcasecmp(table_alias_charset, table_name, "general_log"))
{
result= QUERY_LOG_GENERAL;
goto end;
}
if (table->table_name_length == 8 &&
!my_strcasecmp(table_alias_charset, table_name, "slow_log"))
{
result= QUERY_LOG_SLOW;
goto end;
}
}
return 0;
end:
if (!check_if_opened || logger.is_log_table_enabled(result))
{
if (error_msg)
my_error(ER_BAD_LOG_STATEMENT, MYF(0), error_msg);
return result;
}
return 0;
}
Log_to_csv_event_handler::Log_to_csv_event_handler()
{
}
Log_to_csv_event_handler::~Log_to_csv_event_handler()
{
}
void Log_to_csv_event_handler::cleanup()
{
logger.is_log_tables_initialized= FALSE;
}
/* log event handlers */
/**
Log command to the general log table
Log given command to the general log table.
@param event_time command start timestamp
@param user_host the pointer to the string with user@host info
@param user_host_len length of the user_host string. this is computed
once and passed to all general log event handlers
@param thread_id Id of the thread, issued a query
@param command_type the type of the command being logged
@param command_type_len the length of the string above
@param sql_text the very text of the query being executed
@param sql_text_len the length of sql_text string
@return This function attempts to never call my_error(). This is
necessary, because general logging happens already after a statement
status has been sent to the client, so the client can not see the
error anyway. Besides, the error is not related to the statement
being executed and is internal, and thus should be handled
internally (@todo: how?).
If a write to the table has failed, the function attempts to
write to a short error message to the file. The failure is also
indicated in the return value.
@retval FALSE OK
@retval TRUE error occurred
*/
bool Log_to_csv_event_handler::
log_general(THD *thd, my_hrtime_t event_time, const char *user_host,
uint user_host_len, my_thread_id thread_id_arg,
const char *command_type, uint command_type_len,
const char *sql_text, uint sql_text_len,
CHARSET_INFO *client_cs)
{
TABLE_LIST table_list;
TABLE *table;
bool result= TRUE;
bool need_close= FALSE;
bool need_pop= FALSE;
bool need_rnd_end= FALSE;
uint field_index;
Silence_log_table_errors error_handler;
Open_tables_backup open_tables_backup;
ulonglong save_thd_options;
bool save_time_zone_used;
DBUG_ENTER("log_general");
/*
CSV uses TIME_to_timestamp() internally if table needs to be repaired
which will set thd->time_zone_used
*/
save_time_zone_used= thd->time_zone_used;
save_thd_options= thd->variables.option_bits;
thd->variables.option_bits&= ~OPTION_BIN_LOG;
table_list.init_one_table(MYSQL_SCHEMA_NAME.str, MYSQL_SCHEMA_NAME.length,
GENERAL_LOG_NAME.str, GENERAL_LOG_NAME.length,
GENERAL_LOG_NAME.str,
TL_WRITE_CONCURRENT_INSERT);
/*
1) open_log_table generates an error of the
table can not be opened or is corrupted.
2) "INSERT INTO general_log" can generate warning sometimes.
Suppress these warnings and errors, they can't be dealt with
properly anyway.
QQ: this problem needs to be studied in more detail.
Comment this 2 lines and run "cast.test" to see what's happening.
*/
thd->push_internal_handler(& error_handler);
need_pop= TRUE;
if (!(table= open_log_table(thd, &table_list, &open_tables_backup)))
goto err;
need_close= TRUE;
if (table->file->extra(HA_EXTRA_MARK_AS_LOG_TABLE) ||
table->file->ha_rnd_init_with_error(0))
goto err;
need_rnd_end= TRUE;
/* Honor next number columns if present */
table->next_number_field= table->found_next_number_field;
/*
NOTE: we do not call restore_record() here, as all fields are
filled by the Logger (=> no need to load default ones).
*/
/*
We do not set a value for table->field[0], as it will use
default value (which is CURRENT_TIMESTAMP).
*/
/* check that all columns exist */
if (table->s->fields < 6)
goto err;
DBUG_ASSERT(table->field[0]->type() == MYSQL_TYPE_TIMESTAMP);
((Field_timestamp*) table->field[0])->store_TIME(
hrtime_to_my_time(event_time), hrtime_sec_part(event_time));
/* do a write */
if (table->field[1]->store(user_host, user_host_len, client_cs) ||
table->field[2]->store((longlong) thread_id_arg, TRUE) ||
table->field[3]->store((longlong) global_system_variables.server_id,
TRUE) ||
table->field[4]->store(command_type, command_type_len, client_cs))
goto err;
/*
A positive return value in store() means truncation.
Still logging a message in the log in this case.
*/
table->field[5]->flags|= FIELDFLAG_HEX_ESCAPE;
if (table->field[5]->store(sql_text, sql_text_len, client_cs) < 0)
goto err;
/* mark all fields as not null */
table->field[1]->set_notnull();
table->field[2]->set_notnull();
table->field[3]->set_notnull();
table->field[4]->set_notnull();
table->field[5]->set_notnull();
/* Set any extra columns to their default values */
for (field_index= 6 ; field_index < table->s->fields ; field_index++)
{
table->field[field_index]->set_default();
}
/* log table entries are not replicated */
if (table->file->ha_write_row(table->record[0]))
goto err;
result= FALSE;
err:
if (result && !thd->killed)
sql_print_error("Failed to write to mysql.general_log: %s",
error_handler.message());
if (need_rnd_end)
{
table->file->ha_rnd_end();
table->file->ha_release_auto_increment();
}
if (need_pop)
thd->pop_internal_handler();
if (need_close)
close_log_table(thd, &open_tables_backup);
thd->variables.option_bits= save_thd_options;
thd->time_zone_used= save_time_zone_used;
DBUG_RETURN(result);
}
/*
Log a query to the slow log table
SYNOPSIS
log_slow()
thd THD of the query
current_time current timestamp
user_host the pointer to the string with user@host info
user_host_len length of the user_host string. this is computed once
and passed to all general log event handlers
query_time Amount of time the query took to execute (in microseconds)
lock_time Amount of time the query was locked (in microseconds)
is_command The flag, which determines, whether the sql_text is a
query or an administrator command (these are treated
differently by the old logging routines)
sql_text the very text of the query or administrator command
processed
sql_text_len the length of sql_text string
DESCRIPTION
Log a query to the slow log table
RETURN
FALSE - OK
TRUE - error occurred
*/
bool Log_to_csv_event_handler::
log_slow(THD *thd, my_hrtime_t current_time,
const char *user_host, uint user_host_len,
ulonglong query_utime, ulonglong lock_utime, bool is_command,
const char *sql_text, uint sql_text_len)
{
TABLE_LIST table_list;
TABLE *table;
bool result= TRUE;
bool need_close= FALSE;
bool need_rnd_end= FALSE;
Silence_log_table_errors error_handler;
Open_tables_backup open_tables_backup;
CHARSET_INFO *client_cs= thd->variables.character_set_client;
bool save_time_zone_used;
long query_time= (long) MY_MIN(query_utime/1000000, TIME_MAX_VALUE_SECONDS);
long lock_time= (long) MY_MIN(lock_utime/1000000, TIME_MAX_VALUE_SECONDS);
long query_time_micro= (long) (query_utime % 1000000);
long lock_time_micro= (long) (lock_utime % 1000000);
DBUG_ENTER("Log_to_csv_event_handler::log_slow");
thd->push_internal_handler(& error_handler);
/*
CSV uses TIME_to_timestamp() internally if table needs to be repaired
which will set thd->time_zone_used
*/
save_time_zone_used= thd->time_zone_used;
table_list.init_one_table(MYSQL_SCHEMA_NAME.str, MYSQL_SCHEMA_NAME.length,
SLOW_LOG_NAME.str, SLOW_LOG_NAME.length,
SLOW_LOG_NAME.str,
TL_WRITE_CONCURRENT_INSERT);
if (!(table= open_log_table(thd, &table_list, &open_tables_backup)))
goto err;
need_close= TRUE;
if (table->file->extra(HA_EXTRA_MARK_AS_LOG_TABLE) ||
table->file->ha_rnd_init_with_error(0))
goto err;
need_rnd_end= TRUE;
/* Honor next number columns if present */
table->next_number_field= table->found_next_number_field;
restore_record(table, s->default_values); // Get empty record
/* check that all columns exist */
if (table->s->fields < 13)
goto err;
/* store the time and user values */
DBUG_ASSERT(table->field[0]->type() == MYSQL_TYPE_TIMESTAMP);
((Field_timestamp*) table->field[0])->store_TIME(
hrtime_to_my_time(current_time), hrtime_sec_part(current_time));
if (table->field[1]->store(user_host, user_host_len, client_cs))
goto err;
/*
A TIME field can not hold the full longlong range; query_time or
lock_time may be truncated without warning here, if greater than
839 hours (~35 days)
*/
MYSQL_TIME t;
t.neg= 0;
/* fill in query_time field */
calc_time_from_sec(&t, query_time, query_time_micro);
if (table->field[2]->store_time(&t))
goto err;
/* lock_time */
calc_time_from_sec(&t, lock_time, lock_time_micro);
if (table->field[3]->store_time(&t))
goto err;
/* rows_sent */
if (table->field[4]->store((longlong) thd->get_sent_row_count(), TRUE))
goto err;
/* rows_examined */
if (table->field[5]->store((longlong) thd->get_examined_row_count(), TRUE))
goto err;
/* fill database field */
if (thd->db)
{
if (table->field[6]->store(thd->db, thd->db_length, client_cs))
goto err;
table->field[6]->set_notnull();
}
if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
{
if (table->
field[7]->store((longlong)
thd->first_successful_insert_id_in_prev_stmt_for_binlog,
TRUE))
goto err;
table->field[7]->set_notnull();
}
/*
Set value if we do an insert on autoincrement column. Note that for
some engines (those for which get_auto_increment() does not leave a
table lock until the statement ends), this is just the first value and
the next ones used may not be contiguous to it.
*/
if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
{
if (table->
field[8]->store((longlong)
thd->auto_inc_intervals_in_cur_stmt_for_binlog.minimum(), TRUE))
goto err;
table->field[8]->set_notnull();
}
if (table->field[9]->store((longlong)global_system_variables.server_id, TRUE))
goto err;
table->field[9]->set_notnull();
/*
Column sql_text.
A positive return value in store() means truncation.
Still logging a message in the log in this case.
*/
if (table->field[10]->store(sql_text, sql_text_len, client_cs) < 0)
goto err;
if (table->field[11]->store((longlong) thd->thread_id, TRUE))
goto err;
/* Rows_affected */
if (table->field[12]->store(thd->get_stmt_da()->is_ok() ?
(longlong) thd->get_stmt_da()->affected_rows() :
0, TRUE))
goto err;
/* log table entries are not replicated */
if (table->file->ha_write_row(table->record[0]))
goto err;
result= FALSE;
err:
thd->pop_internal_handler();
if (result && !thd->killed)
sql_print_error("Failed to write to mysql.slow_log: %s",
error_handler.message());
if (need_rnd_end)
{
table->file->ha_rnd_end();
table->file->ha_release_auto_increment();
}
if (need_close)
close_log_table(thd, &open_tables_backup);
thd->time_zone_used= save_time_zone_used;
DBUG_RETURN(result);
}
int Log_to_csv_event_handler::
activate_log(THD *thd, uint log_table_type)
{
TABLE_LIST table_list;
TABLE *table;
LEX_STRING *UNINIT_VAR(log_name);
int result;
Open_tables_backup open_tables_backup;
DBUG_ENTER("Log_to_csv_event_handler::activate_log");
if (log_table_type == QUERY_LOG_GENERAL)
{
log_name= &GENERAL_LOG_NAME;
}
else
{
DBUG_ASSERT(log_table_type == QUERY_LOG_SLOW);
log_name= &SLOW_LOG_NAME;
}
table_list.init_one_table(MYSQL_SCHEMA_NAME.str, MYSQL_SCHEMA_NAME.length,
log_name->str, log_name->length, log_name->str,
TL_WRITE_CONCURRENT_INSERT);
table= open_log_table(thd, &table_list, &open_tables_backup);
if (table)
{
result= 0;
close_log_table(thd, &open_tables_backup);
}
else
result= 1;
DBUG_RETURN(result);
}
bool Log_to_csv_event_handler::
log_error(enum loglevel level, const char *format, va_list args)
{
/* No log table is implemented */
DBUG_ASSERT(0);
return FALSE;
}
bool Log_to_file_event_handler::
log_error(enum loglevel level, const char *format,
va_list args)
{
return vprint_msg_to_log(level, format, args);
}
void Log_to_file_event_handler::init_pthread_objects()
{
mysql_log.init_pthread_objects();
mysql_slow_log.init_pthread_objects();
}
/** Wrapper around MYSQL_LOG::write() for slow log. */
bool Log_to_file_event_handler::
log_slow(THD *thd, my_hrtime_t current_time,
const char *user_host, uint user_host_len,
ulonglong query_utime, ulonglong lock_utime, bool is_command,
const char *sql_text, uint sql_text_len)
{
Silence_log_table_errors error_handler;
thd->push_internal_handler(&error_handler);
bool retval= mysql_slow_log.write(thd, hrtime_to_my_time(current_time),
user_host, user_host_len,
query_utime, lock_utime, is_command,
sql_text, sql_text_len);
thd->pop_internal_handler();
return retval;
}
/**
Wrapper around MYSQL_LOG::write() for general log. We need it since we
want all log event handlers to have the same signature.
*/
bool Log_to_file_event_handler::
log_general(THD *thd, my_hrtime_t event_time, const char *user_host,
uint user_host_len, my_thread_id thread_id_arg,
const char *command_type, uint command_type_len,
const char *sql_text, uint sql_text_len,
CHARSET_INFO *client_cs)
{
Silence_log_table_errors error_handler;
thd->push_internal_handler(&error_handler);
bool retval= mysql_log.write(hrtime_to_time(event_time), user_host,
user_host_len,
thread_id_arg, command_type, command_type_len,
sql_text, sql_text_len);
thd->pop_internal_handler();
return retval;
}
bool Log_to_file_event_handler::init()
{
if (!is_initialized)
{
if (global_system_variables.sql_log_slow)
mysql_slow_log.open_slow_log(opt_slow_logname);
if (opt_log)
mysql_log.open_query_log(opt_logname);
is_initialized= TRUE;
}
return FALSE;
}
void Log_to_file_event_handler::cleanup()
{
mysql_log.cleanup();
mysql_slow_log.cleanup();
}
void Log_to_file_event_handler::flush()
{
/* reopen log files */
if (opt_log)
mysql_log.reopen_file();
if (global_system_variables.sql_log_slow)
mysql_slow_log.reopen_file();
}
/*
Log error with all enabled log event handlers
SYNOPSIS
error_log_print()
level The level of the error significance: NOTE,
WARNING or ERROR.
format format string for the error message
args list of arguments for the format string
RETURN
FALSE - OK
TRUE - error occurred
*/
bool LOGGER::error_log_print(enum loglevel level, const char *format,
va_list args)
{
bool error= FALSE;
Log_event_handler **current_handler;
/* currently we don't need locking here as there is no error_log table */
for (current_handler= error_log_handler_list ; *current_handler ;)
error= (*current_handler++)->log_error(level, format, args) || error;
return error;
}
void LOGGER::cleanup_base()
{
DBUG_ASSERT(inited == 1);
mysql_rwlock_destroy(&LOCK_logger);
if (table_log_handler)
{
table_log_handler->cleanup();
delete table_log_handler;
table_log_handler= NULL;
}
if (file_log_handler)
file_log_handler->cleanup();
}
void LOGGER::cleanup_end()
{
DBUG_ASSERT(inited == 1);
if (file_log_handler)
{
delete file_log_handler;
file_log_handler=NULL;
}
inited= 0;
}
/**
Perform basic log initialization: create file-based log handler and
init error log.
*/
void LOGGER::init_base()
{
DBUG_ASSERT(inited == 0);
inited= 1;
/*
Here we create file log handler. We don't do it for the table log handler
here as it cannot be created so early. The reason is THD initialization,
which depends on the system variables (parsed later).
*/
if (!file_log_handler)
file_log_handler= new Log_to_file_event_handler;
/* by default we use traditional error log */
init_error_log(LOG_FILE);
file_log_handler->init_pthread_objects();
mysql_rwlock_init(key_rwlock_LOCK_logger, &LOCK_logger);
}
void LOGGER::init_log_tables()
{
if (!table_log_handler)
table_log_handler= new Log_to_csv_event_handler;
if (!is_log_tables_initialized &&
!table_log_handler->init() && !file_log_handler->init())
is_log_tables_initialized= TRUE;
}
/**
Close and reopen the slow log (with locks).
@returns FALSE.
*/
bool LOGGER::flush_slow_log()
{
/*
Now we lock logger, as nobody should be able to use logging routines while
log tables are closed
*/
logger.lock_exclusive();
/* Reopen slow log file */
if (global_system_variables.sql_log_slow)
file_log_handler->get_mysql_slow_log()->reopen_file();
/* End of log flush */
logger.unlock();
return 0;
}
/**
Close and reopen the general log (with locks).
@returns FALSE.
*/
bool LOGGER::flush_general_log()
{
/*
Now we lock logger, as nobody should be able to use logging routines while
log tables are closed
*/
logger.lock_exclusive();
/* Reopen general log file */
if (opt_log)
file_log_handler->get_mysql_log()->reopen_file();
/* End of log flush */
logger.unlock();
return 0;
}
/*
Log slow query with all enabled log event handlers
SYNOPSIS
slow_log_print()
thd THD of the query being logged
query The query being logged
query_length The length of the query string
current_utime Current time in microseconds (from undefined start)
RETURN
FALSE OK
TRUE error occurred
*/
bool LOGGER::slow_log_print(THD *thd, const char *query, uint query_length,
ulonglong current_utime)
{
bool error= FALSE;
Log_event_handler **current_handler;
bool is_command= FALSE;
char user_host_buff[MAX_USER_HOST_SIZE + 1];
Security_context *sctx= thd->security_ctx;
uint user_host_len= 0;
ulonglong query_utime, lock_utime;
DBUG_ASSERT(thd->enable_slow_log);
/*
Print the message to the buffer if we have slow log enabled
*/
if (*slow_log_handler_list)
{
/* do not log slow queries from replication threads */
if (!thd->variables.sql_log_slow)
return 0;
lock_shared();
if (!global_system_variables.sql_log_slow)
{
unlock();
return 0;
}
/* fill in user_host value: the format is "%s[%s] @ %s [%s]" */
user_host_len= (strxnmov(user_host_buff, MAX_USER_HOST_SIZE,
sctx->priv_user, "[",
sctx->user ? sctx->user : (thd->slave_thread ? "SQL_SLAVE" : ""), "] @ ",
sctx->host ? sctx->host : "", " [",
sctx->ip ? sctx->ip : "", "]", NullS) -
user_host_buff);
DBUG_ASSERT(thd->start_utime);
DBUG_ASSERT(thd->start_time);
query_utime= (current_utime - thd->start_utime);
lock_utime= (thd->utime_after_lock - thd->start_utime);
my_hrtime_t current_time= { hrtime_from_time(thd->start_time) +
thd->start_time_sec_part + query_utime };
if (!query)
{
is_command= TRUE;
query= command_name[thd->get_command()].str;
query_length= command_name[thd->get_command()].length;
}
for (current_handler= slow_log_handler_list; *current_handler ;)
error= (*current_handler++)->log_slow(thd, current_time,
user_host_buff, user_host_len,
query_utime, lock_utime, is_command,
query, query_length) || error;
unlock();
}
return error;
}
bool LOGGER::general_log_write(THD *thd, enum enum_server_command command,
const char *query, uint query_length)
{
bool error= FALSE;
Log_event_handler **current_handler= general_log_handler_list;
char user_host_buff[MAX_USER_HOST_SIZE + 1];
uint user_host_len= 0;
my_hrtime_t current_time;
DBUG_ASSERT(thd);
user_host_len= make_user_name(thd, user_host_buff);
current_time= my_hrtime();
mysql_audit_general_log(thd, hrtime_to_time(current_time),
user_host_buff, user_host_len,
command_name[(uint) command].str,
command_name[(uint) command].length,
query, query_length);
if (opt_log && log_command(thd, command))
{
lock_shared();
while (*current_handler)
error|= (*current_handler++)->
log_general(thd, current_time, user_host_buff,
user_host_len, thd->thread_id,
command_name[(uint) command].str,
command_name[(uint) command].length,
query, query_length,
thd->variables.character_set_client) || error;
unlock();
}
return error;
}
bool LOGGER::general_log_print(THD *thd, enum enum_server_command command,
const char *format, va_list args)
{
uint message_buff_len= 0;
char message_buff[MAX_LOG_BUFFER_SIZE];
/* prepare message */
if (format)
message_buff_len= my_vsnprintf(message_buff, sizeof(message_buff),
format, args);
else
message_buff[0]= '\0';
return general_log_write(thd, command, message_buff, message_buff_len);
}
void LOGGER::init_error_log(ulonglong error_log_printer)
{
if (error_log_printer & LOG_NONE)
{
error_log_handler_list[0]= 0;
return;
}
switch (error_log_printer) {
case LOG_FILE:
error_log_handler_list[0]= file_log_handler;
error_log_handler_list[1]= 0;
break;
/* these two are disabled for now */
case LOG_TABLE:
DBUG_ASSERT(0);
break;
case LOG_TABLE|LOG_FILE:
DBUG_ASSERT(0);
break;
}
}
void LOGGER::init_slow_log(ulonglong slow_log_printer)
{
if (slow_log_printer & LOG_NONE)
{
slow_log_handler_list[0]= 0;
return;
}
switch (slow_log_printer) {
case LOG_FILE:
slow_log_handler_list[0]= file_log_handler;
slow_log_handler_list[1]= 0;
break;
case LOG_TABLE:
slow_log_handler_list[0]= table_log_handler;
slow_log_handler_list[1]= 0;
break;
case LOG_TABLE|LOG_FILE:
slow_log_handler_list[0]= file_log_handler;
slow_log_handler_list[1]= table_log_handler;
slow_log_handler_list[2]= 0;
break;
}
}
void LOGGER::init_general_log(ulonglong general_log_printer)
{
if (general_log_printer & LOG_NONE)
{
general_log_handler_list[0]= 0;
return;
}
switch (general_log_printer) {
case LOG_FILE:
general_log_handler_list[0]= file_log_handler;
general_log_handler_list[1]= 0;
break;
case LOG_TABLE:
general_log_handler_list[0]= table_log_handler;
general_log_handler_list[1]= 0;
break;
case LOG_TABLE|LOG_FILE:
general_log_handler_list[0]= file_log_handler;
general_log_handler_list[1]= table_log_handler;
general_log_handler_list[2]= 0;
break;
}
}
bool LOGGER::activate_log_handler(THD* thd, uint log_type)
{
MYSQL_QUERY_LOG *file_log;
bool res= FALSE;
lock_exclusive();
switch (log_type) {
case QUERY_LOG_SLOW:
if (!global_system_variables.sql_log_slow)
{
file_log= file_log_handler->get_mysql_slow_log();
file_log->open_slow_log(opt_slow_logname);
if (table_log_handler->activate_log(thd, QUERY_LOG_SLOW))
{
/* Error printed by open table in activate_log() */
res= TRUE;
file_log->close(0);
}
else
{
init_slow_log(log_output_options);
global_system_variables.sql_log_slow= TRUE;
}
}
break;
case QUERY_LOG_GENERAL:
if (!opt_log)
{
file_log= file_log_handler->get_mysql_log();
file_log->open_query_log(opt_logname);
if (table_log_handler->activate_log(thd, QUERY_LOG_GENERAL))
{
/* Error printed by open table in activate_log() */
res= TRUE;
file_log->close(0);
}
else
{
init_general_log(log_output_options);
opt_log= TRUE;
}
}
break;
default:
DBUG_ASSERT(0);
}
unlock();
return res;
}
void LOGGER::deactivate_log_handler(THD *thd, uint log_type)
{
my_bool *tmp_opt= 0;
MYSQL_LOG *UNINIT_VAR(file_log);
switch (log_type) {
case QUERY_LOG_SLOW:
tmp_opt= &global_system_variables.sql_log_slow;
file_log= file_log_handler->get_mysql_slow_log();
break;
case QUERY_LOG_GENERAL:
tmp_opt= &opt_log;
file_log= file_log_handler->get_mysql_log();
break;
default:
MY_ASSERT_UNREACHABLE();
}
if (!(*tmp_opt))
return;
lock_exclusive();
file_log->close(0);
*tmp_opt= FALSE;
unlock();
}
/* the parameters are unused for the log tables */
bool Log_to_csv_event_handler::init()
{
return 0;
}
int LOGGER::set_handlers(ulonglong error_log_printer,
ulonglong slow_log_printer,
ulonglong general_log_printer)
{
/* error log table is not supported yet */
DBUG_ASSERT(error_log_printer < LOG_TABLE);
lock_exclusive();
if ((slow_log_printer & LOG_TABLE || general_log_printer & LOG_TABLE) &&
!is_log_tables_initialized)
{
slow_log_printer= (slow_log_printer & ~LOG_TABLE) | LOG_FILE;
general_log_printer= (general_log_printer & ~LOG_TABLE) | LOG_FILE;
sql_print_error("Failed to initialize log tables. "
"Falling back to the old-fashioned logs");
}
init_error_log(error_log_printer);
init_slow_log(slow_log_printer);
init_general_log(general_log_printer);
unlock();
return 0;
}
/*
Save position of binary log transaction cache.
SYNPOSIS
binlog_trans_log_savepos()
thd The thread to take the binlog data from
pos Pointer to variable where the position will be stored
DESCRIPTION
Save the current position in the binary log transaction cache into
the variable pointed to by 'pos'
*/
static void
binlog_trans_log_savepos(THD *thd, my_off_t *pos)
{
DBUG_ENTER("binlog_trans_log_savepos");
DBUG_ASSERT(pos != NULL);
binlog_cache_mngr *const cache_mngr= thd->binlog_setup_trx_data();
DBUG_ASSERT((WSREP(thd) && wsrep_emulate_bin_log) || mysql_bin_log.is_open());
*pos= cache_mngr->trx_cache.get_byte_position();
DBUG_PRINT("return", ("*pos: %lu", (ulong) *pos));
DBUG_VOID_RETURN;
}
/*
Truncate the binary log transaction cache.
SYNPOSIS
binlog_trans_log_truncate()
thd The thread to take the binlog data from
pos Position to truncate to
DESCRIPTION
Truncate the binary log to the given position. Will not change
anything else.
*/
static void
binlog_trans_log_truncate(THD *thd, my_off_t pos)
{
DBUG_ENTER("binlog_trans_log_truncate");
DBUG_PRINT("enter", ("pos: %lu", (ulong) pos));
DBUG_ASSERT(thd_get_ha_data(thd, binlog_hton) != NULL);
/* Only true if binlog_trans_log_savepos() wasn't called before */
DBUG_ASSERT(pos != ~(my_off_t) 0);
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
cache_mngr->trx_cache.restore_savepoint(pos);
DBUG_VOID_RETURN;
}
/*
this function is mostly a placeholder.
conceptually, binlog initialization (now mostly done in MYSQL_BIN_LOG::open)
should be moved here.
*/
int binlog_init(void *p)
{
binlog_hton= (handlerton *)p;
binlog_hton->state= (WSREP_ON || opt_bin_log) ? SHOW_OPTION_YES
: SHOW_OPTION_NO;
binlog_hton->db_type=DB_TYPE_BINLOG;
binlog_hton->savepoint_offset= sizeof(my_off_t);
binlog_hton->close_connection= binlog_close_connection;
binlog_hton->savepoint_set= binlog_savepoint_set;
binlog_hton->savepoint_rollback= binlog_savepoint_rollback;
binlog_hton->savepoint_rollback_can_release_mdl=
binlog_savepoint_rollback_can_release_mdl;
binlog_hton->commit= binlog_commit;
binlog_hton->rollback= binlog_rollback;
binlog_hton->prepare= binlog_prepare;
binlog_hton->start_consistent_snapshot= binlog_start_consistent_snapshot;
binlog_hton->flags= HTON_NOT_USER_SELECTABLE | HTON_HIDDEN;
return 0;
}
#ifdef WITH_WSREP
#include "wsrep_binlog.h"
#endif /* WITH_WSREP */
static int binlog_close_connection(handlerton *hton, THD *thd)
{
DBUG_ENTER("binlog_close_connection");
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
#ifdef WITH_WSREP
if (cache_mngr && !cache_mngr->trx_cache.empty()) {
IO_CACHE* cache= get_trans_log(thd);
uchar *buf;
size_t len=0;
wsrep_write_cache_buf(cache, &buf, &len);
WSREP_WARN("binlog trx cache not empty (%lu bytes) @ connection close %lld",
(ulong) len, (longlong) thd->thread_id);
if (len > 0) wsrep_dump_rbr_buf(thd, buf, len);
cache = cache_mngr->get_binlog_cache_log(false);
wsrep_write_cache_buf(cache, &buf, &len);
WSREP_WARN("binlog stmt cache not empty (%lu bytes) @ connection close %lld",
(ulong) len, (longlong) thd->thread_id);
if (len > 0) wsrep_dump_rbr_buf(thd, buf, len);
}
#endif /* WITH_WSREP */
DBUG_ASSERT(cache_mngr->trx_cache.empty() && cache_mngr->stmt_cache.empty());
thd_set_ha_data(thd, binlog_hton, NULL);
cache_mngr->~binlog_cache_mngr();
my_free(cache_mngr);
DBUG_RETURN(0);
}
/*
This function flushes a cache upon commit/rollback.
SYNOPSIS
binlog_flush_cache()
thd The thread whose transaction should be ended
cache_mngr Pointer to the binlog_cache_mngr to use
all True if the entire transaction should be ended, false if
only the statement transaction should be ended.
end_ev The end event to use (COMMIT, ROLLBACK, or commit XID)
using_stmt True if the statement cache should be flushed
using_trx True if the transaction cache should be flushed
DESCRIPTION
End the currently transaction or statement. The transaction can be either
a real transaction or a statement transaction.
This can be to commit a transaction, with a COMMIT query event or an XA
commit XID event. But it can also be to rollback a transaction with a
ROLLBACK query event, used for rolling back transactions which also
contain updates to non-transactional tables. Or it can be a flush of
a statement cache.
*/
static int
binlog_flush_cache(THD *thd, binlog_cache_mngr *cache_mngr,
Log_event *end_ev, bool all, bool using_stmt,
bool using_trx)
{
int error= 0;
DBUG_ENTER("binlog_flush_cache");
DBUG_PRINT("enter", ("end_ev: %p", end_ev));
if ((using_stmt && !cache_mngr->stmt_cache.empty()) ||
(using_trx && !cache_mngr->trx_cache.empty()))
{
if (using_stmt && thd->binlog_flush_pending_rows_event(TRUE, FALSE))
DBUG_RETURN(1);
if (using_trx && thd->binlog_flush_pending_rows_event(TRUE, TRUE))
DBUG_RETURN(1);
/*
Doing a commit or a rollback including non-transactional tables,
i.e., ending a transaction where we might write the transaction
cache to the binary log.
We can always end the statement when ending a transaction since
transactions are not allowed inside stored functions. If they
were, we would have to ensure that we're not ending a statement
inside a stored function.
*/
error= mysql_bin_log.write_transaction_to_binlog(thd, cache_mngr,
end_ev, all,
using_stmt, using_trx);
}
else
{
/*
This can happen in row-format binlog with something like
BEGIN; INSERT INTO nontrans_table; INSERT IGNORE INTO trans_table;
The nontrans_table is written directly into the binlog before commit,
and if the trans_table is ignored there will be no rows to write when
we get here.
So there is no work to do. Therefore, we will not increment any XID
count, so we must not decrement any XID count in unlog().
*/
cache_mngr->need_unlog= 0;
}
cache_mngr->reset(using_stmt, using_trx);
DBUG_ASSERT((!using_stmt || cache_mngr->stmt_cache.empty()) &&
(!using_trx || cache_mngr->trx_cache.empty()));
DBUG_RETURN(error);
}
/**
This function flushes the stmt-cache upon commit.
@param thd The thread whose transaction should be flushed
@param cache_mngr Pointer to the cache manager
@return
nonzero if an error pops up when flushing the cache.
*/
static inline int
binlog_commit_flush_stmt_cache(THD *thd, bool all,
binlog_cache_mngr *cache_mngr)
{
DBUG_ENTER("binlog_commit_flush_stmt_cache");
#ifdef WITH_WSREP
if (thd->wsrep_mysql_replicated > 0)
{
DBUG_ASSERT(WSREP_ON);
WSREP_DEBUG("avoiding binlog_commit_flush_trx_cache: %d",
thd->wsrep_mysql_replicated);
return 0;
}
#endif
Query_log_event end_evt(thd, STRING_WITH_LEN("COMMIT"),
FALSE, TRUE, TRUE, 0);
DBUG_RETURN(binlog_flush_cache(thd, cache_mngr, &end_evt, all, TRUE, FALSE));
}
/**
This function flushes the trx-cache upon commit.
@param thd The thread whose transaction should be flushed
@param cache_mngr Pointer to the cache manager
@return
nonzero if an error pops up when flushing the cache.
*/
static inline int
binlog_commit_flush_trx_cache(THD *thd, bool all, binlog_cache_mngr *cache_mngr)
{
DBUG_ENTER("binlog_commit_flush_trx_cache");
Query_log_event end_evt(thd, STRING_WITH_LEN("COMMIT"),
TRUE, TRUE, TRUE, 0);
DBUG_RETURN(binlog_flush_cache(thd, cache_mngr, &end_evt, all, FALSE, TRUE));
}
/**
This function flushes the trx-cache upon rollback.
@param thd The thread whose transaction should be flushed
@param cache_mngr Pointer to the cache manager
@return
nonzero if an error pops up when flushing the cache.
*/
static inline int
binlog_rollback_flush_trx_cache(THD *thd, bool all,
binlog_cache_mngr *cache_mngr)
{
Query_log_event end_evt(thd, STRING_WITH_LEN("ROLLBACK"),
TRUE, TRUE, TRUE, 0);
return (binlog_flush_cache(thd, cache_mngr, &end_evt, all, FALSE, TRUE));
}
/**
This function flushes the trx-cache upon commit.
@param thd The thread whose transaction should be flushed
@param cache_mngr Pointer to the cache manager
@param xid Transaction Id
@return
nonzero if an error pops up when flushing the cache.
*/
static inline int
binlog_commit_flush_xid_caches(THD *thd, binlog_cache_mngr *cache_mngr,
bool all, my_xid xid)
{
if (xid)
{
Xid_log_event end_evt(thd, xid, TRUE);
return (binlog_flush_cache(thd, cache_mngr, &end_evt, all, TRUE, TRUE));
}
else
{
/*
Empty xid occurs in XA COMMIT ... ONE PHASE.
In this case, we do not have a MySQL xid for the transaction, and the
external XA transaction coordinator will have to handle recovery if
needed. So we end the transaction with a plain COMMIT query event.
*/
Query_log_event end_evt(thd, STRING_WITH_LEN("COMMIT"),
TRUE, TRUE, TRUE, 0);
return (binlog_flush_cache(thd, cache_mngr, &end_evt, all, TRUE, TRUE));
}
}
/**
This function truncates the transactional cache upon committing or rolling
back either a transaction or a statement.
@param thd The thread whose transaction should be flushed
@param cache_mngr Pointer to the cache data to be flushed
@param all @c true means truncate the transaction, otherwise the
statement must be truncated.
@return
nonzero if an error pops up when truncating the transactional cache.
*/
static int
binlog_truncate_trx_cache(THD *thd, binlog_cache_mngr *cache_mngr, bool all)
{
DBUG_ENTER("binlog_truncate_trx_cache");
int error=0;
/*
This function handles transactional changes and as such this flag
equals to true.
*/
bool const is_transactional= TRUE;
DBUG_PRINT("info", ("thd->options={ %s %s}, transaction: %s",
FLAGSTR(thd->variables.option_bits, OPTION_NOT_AUTOCOMMIT),
FLAGSTR(thd->variables.option_bits, OPTION_BEGIN),
all ? "all" : "stmt"));
thd->binlog_remove_pending_rows_event(TRUE, is_transactional);
/*
If rolling back an entire transaction or a single statement not
inside a transaction, we reset the transaction cache.
*/
if (ending_trans(thd, all))
{
if (cache_mngr->trx_cache.has_incident())
error= mysql_bin_log.write_incident(thd);
thd->clear_binlog_table_maps();
cache_mngr->reset(false, true);
}
/*
If rolling back a statement in a transaction, we truncate the
transaction cache to remove the statement.
*/
else
cache_mngr->trx_cache.restore_prev_position();
DBUG_ASSERT(thd->binlog_get_pending_rows_event(is_transactional) == NULL);
DBUG_RETURN(error);
}
static int binlog_prepare(handlerton *hton, THD *thd, bool all)
{
/*
do nothing.
just pretend we can do 2pc, so that MySQL won't
switch to 1pc.
real work will be done in MYSQL_BIN_LOG::log_and_order()
*/
return 0;
}
/*
We flush the cache wrapped in a beging/rollback if:
. aborting a single or multi-statement transaction and;
. the OPTION_KEEP_LOG is active or;
. the format is STMT and a non-trans table was updated or;
. the format is MIXED and a temporary non-trans table was
updated or;
. the format is MIXED, non-trans table was updated and
aborting a single statement transaction;
*/
static bool trans_cannot_safely_rollback(THD *thd, bool all)
{
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
return ((thd->variables.option_bits & OPTION_KEEP_LOG) ||
(trans_has_updated_non_trans_table(thd) &&
thd->wsrep_binlog_format() == BINLOG_FORMAT_STMT) ||
(cache_mngr->trx_cache.changes_to_non_trans_temp_table() &&
thd->wsrep_binlog_format() == BINLOG_FORMAT_MIXED) ||
(trans_has_updated_non_trans_table(thd) &&
ending_single_stmt_trans(thd,all) &&
thd->wsrep_binlog_format() == BINLOG_FORMAT_MIXED));
}
/**
This function is called once after each statement.
It has the responsibility to flush the caches to the binary log on commits.
@param hton The binlog handlerton.
@param thd The client thread that executes the transaction.
@param all This is @c true if this is a real transaction commit, and
@false otherwise.
@see handlerton::commit
*/
static int binlog_commit(handlerton *hton, THD *thd, bool all)
{
int error= 0;
DBUG_ENTER("binlog_commit");
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
if (!cache_mngr)
{
DBUG_ASSERT(WSREP(thd));
DBUG_RETURN(0);
}
DBUG_PRINT("debug",
("all: %d, in_transaction: %s, all.modified_non_trans_table: %s, stmt.modified_non_trans_table: %s",
all,
YESNO(thd->in_multi_stmt_transaction_mode()),
YESNO(thd->transaction.all.modified_non_trans_table),
YESNO(thd->transaction.stmt.modified_non_trans_table)));
if (!cache_mngr->stmt_cache.empty())
{
error= binlog_commit_flush_stmt_cache(thd, all, cache_mngr);
}
if (cache_mngr->trx_cache.empty())
{
/*
we're here because cache_log was flushed in MYSQL_BIN_LOG::log_xid()
*/
cache_mngr->reset(false, true);
DBUG_RETURN(error);
}
/*
We commit the transaction if:
- We are not in a transaction and committing a statement, or
- We are in a transaction and a full transaction is committed.
Otherwise, we accumulate the changes.
*/
if (!error && ending_trans(thd, all))
error= binlog_commit_flush_trx_cache(thd, all, cache_mngr);
/*
This is part of the stmt rollback.
*/
if (!all)
cache_mngr->trx_cache.set_prev_position(MY_OFF_T_UNDEF);
DBUG_RETURN(error);
}
/**
This function is called when a transaction or a statement is rolled back.
@param hton The binlog handlerton.
@param thd The client thread that executes the transaction.
@param all This is @c true if this is a real transaction rollback, and
@false otherwise.
@see handlerton::rollback
*/
static int binlog_rollback(handlerton *hton, THD *thd, bool all)
{
DBUG_ENTER("binlog_rollback");
int error= 0;
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
if (!cache_mngr)
{
DBUG_ASSERT(WSREP(thd));
DBUG_RETURN(0);
}
DBUG_PRINT("debug", ("all: %s, all.modified_non_trans_table: %s, stmt.modified_non_trans_table: %s",
YESNO(all),
YESNO(thd->transaction.all.modified_non_trans_table),
YESNO(thd->transaction.stmt.modified_non_trans_table)));
/*
If an incident event is set we do not flush the content of the statement
cache because it may be corrupted.
*/
if (cache_mngr->stmt_cache.has_incident())
{
error= mysql_bin_log.write_incident(thd);
cache_mngr->reset(true, false);
}
else if (!cache_mngr->stmt_cache.empty())
{
error= binlog_commit_flush_stmt_cache(thd, all, cache_mngr);
}
if (cache_mngr->trx_cache.empty())
{
/*
we're here because cache_log was flushed in MYSQL_BIN_LOG::log_xid()
*/
cache_mngr->reset(false, true);
DBUG_RETURN(error);
}
if (!wsrep_emulate_bin_log && mysql_bin_log.check_write_error(thd))
{
/*
"all == true" means that a "rollback statement" triggered the error and
this function was called. However, this must not happen as a rollback
is written directly to the binary log. And in auto-commit mode, a single
statement that is rolled back has the flag all == false.
*/
DBUG_ASSERT(!all);
/*
We reach this point if the effect of a statement did not properly get into
a cache and need to be rolled back.
*/
error |= binlog_truncate_trx_cache(thd, cache_mngr, all);
}
else if (!error)
{
if (ending_trans(thd, all) && trans_cannot_safely_rollback(thd, all))
error= binlog_rollback_flush_trx_cache(thd, all, cache_mngr);
/*
Truncate the cache if:
. aborting a single or multi-statement transaction or;
. the OPTION_KEEP_LOG is not active and;
. the format is not STMT or no non-trans table was
updated and;
. the format is not MIXED or no temporary non-trans table
was updated.
*/
else if (ending_trans(thd, all) ||
(!(thd->variables.option_bits & OPTION_KEEP_LOG) &&
(!stmt_has_updated_non_trans_table(thd) ||
thd->wsrep_binlog_format() != BINLOG_FORMAT_STMT) &&
(!cache_mngr->trx_cache.changes_to_non_trans_temp_table() ||
thd->wsrep_binlog_format() != BINLOG_FORMAT_MIXED)))
error= binlog_truncate_trx_cache(thd, cache_mngr, all);
}
/*
This is part of the stmt rollback.
*/
if (!all)
cache_mngr->trx_cache.set_prev_position(MY_OFF_T_UNDEF);
DBUG_RETURN(error);
}
void binlog_reset_cache(THD *thd)
{
binlog_cache_mngr *const cache_mngr= opt_bin_log ?
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton) : 0;
DBUG_ENTER("binlog_reset_cache");
if (cache_mngr)
{
thd->binlog_remove_pending_rows_event(TRUE, TRUE);
cache_mngr->reset(true, true);
}
DBUG_VOID_RETURN;
}
void MYSQL_BIN_LOG::set_write_error(THD *thd, bool is_transactional)
{
DBUG_ENTER("MYSQL_BIN_LOG::set_write_error");
write_error= 1;
if (check_write_error(thd))
DBUG_VOID_RETURN;
if (my_errno == EFBIG)
{
if (is_transactional)
{
my_message(ER_TRANS_CACHE_FULL, ER_THD(thd, ER_TRANS_CACHE_FULL), MYF(MY_WME));
}
else
{
my_message(ER_STMT_CACHE_FULL, ER_THD(thd, ER_STMT_CACHE_FULL), MYF(MY_WME));
}
}
else
{
my_error(ER_ERROR_ON_WRITE, MYF(MY_WME), name, errno);
}
DBUG_VOID_RETURN;
}
bool MYSQL_BIN_LOG::check_write_error(THD *thd)
{
DBUG_ENTER("MYSQL_BIN_LOG::check_write_error");
bool checked= FALSE;
if (!thd->is_error())
DBUG_RETURN(checked);
switch (thd->get_stmt_da()->sql_errno())
{
case ER_TRANS_CACHE_FULL:
case ER_STMT_CACHE_FULL:
case ER_ERROR_ON_WRITE:
case ER_BINLOG_LOGGING_IMPOSSIBLE:
checked= TRUE;
break;
}
DBUG_RETURN(checked);
}
/**
@note
How do we handle this (unlikely but legal) case:
@verbatim
[transaction] + [update to non-trans table] + [rollback to savepoint] ?
@endverbatim
The problem occurs when a savepoint is before the update to the
non-transactional table. Then when there's a rollback to the savepoint, if we
simply truncate the binlog cache, we lose the part of the binlog cache where
the update is. If we want to not lose it, we need to write the SAVEPOINT
command and the ROLLBACK TO SAVEPOINT command to the binlog cache. The latter
is easy: it's just write at the end of the binlog cache, but the former
should be *inserted* to the place where the user called SAVEPOINT. The
solution is that when the user calls SAVEPOINT, we write it to the binlog
cache (so no need to later insert it). As transactions are never intermixed
in the binary log (i.e. they are serialized), we won't have conflicts with
savepoint names when using mysqlbinlog or in the slave SQL thread.
Then when ROLLBACK TO SAVEPOINT is called, if we updated some
non-transactional table, we don't truncate the binlog cache but instead write
ROLLBACK TO SAVEPOINT to it; otherwise we truncate the binlog cache (which
will chop the SAVEPOINT command from the binlog cache, which is good as in
that case there is no need to have it in the binlog).
*/
static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv)
{
int error= 1;
DBUG_ENTER("binlog_savepoint_set");
if (wsrep_emulate_bin_log)
DBUG_RETURN(0);
char buf[1024];
String log_query(buf, sizeof(buf), &my_charset_bin);
if (log_query.copy(STRING_WITH_LEN("SAVEPOINT "), &my_charset_bin) ||
append_identifier(thd, &log_query,
thd->lex->ident.str, thd->lex->ident.length))
DBUG_RETURN(1);
int errcode= query_error_code(thd, thd->killed == NOT_KILLED);
Query_log_event qinfo(thd, log_query.c_ptr_safe(), log_query.length(),
TRUE, FALSE, TRUE, errcode);
/*
We cannot record the position before writing the statement
because a rollback to a savepoint (.e.g. consider it "S") would
prevent the savepoint statement (i.e. "SAVEPOINT S") from being
written to the binary log despite the fact that the server could
still issue other rollback statements to the same savepoint (i.e.
"S").
Given that the savepoint is valid until the server releases it,
ie, until the transaction commits or it is released explicitly,
we need to log it anyway so that we don't have "ROLLBACK TO S"
or "RELEASE S" without the preceding "SAVEPOINT S" in the binary
log.
*/
if (!(error= mysql_bin_log.write(&qinfo)))
binlog_trans_log_savepos(thd, (my_off_t*) sv);
DBUG_RETURN(error);
}
static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv)
{
DBUG_ENTER("binlog_savepoint_rollback");
if (wsrep_emulate_bin_log)
DBUG_RETURN(0);
/*
Write ROLLBACK TO SAVEPOINT to the binlog cache if we have updated some
non-transactional table. Otherwise, truncate the binlog cache starting
from the SAVEPOINT command.
*/
if (unlikely(trans_has_updated_non_trans_table(thd) ||
(thd->variables.option_bits & OPTION_KEEP_LOG)))
{
char buf[1024];
String log_query(buf, sizeof(buf), &my_charset_bin);
if (log_query.copy(STRING_WITH_LEN("ROLLBACK TO "), &my_charset_bin) ||
append_identifier(thd, &log_query,
thd->lex->ident.str, thd->lex->ident.length))
DBUG_RETURN(1);
int errcode= query_error_code(thd, thd->killed == NOT_KILLED);
Query_log_event qinfo(thd, log_query.ptr(), log_query.length(),
TRUE, FALSE, TRUE, errcode);
DBUG_RETURN(mysql_bin_log.write(&qinfo));
}
binlog_trans_log_truncate(thd, *(my_off_t*)sv);
/*
When a SAVEPOINT is executed inside a stored function/trigger we force the
pending event to be flushed with a STMT_END_F flag and clear the table maps
as well to ensure that following DMLs will have a clean state to start
with. ROLLBACK inside a stored routine has to finalize possibly existing
current row-based pending event with cleaning up table maps. That ensures
that following DMLs will have a clean state to start with.
*/
if (thd->in_sub_stmt)
thd->clear_binlog_table_maps();
DBUG_RETURN(0);
}
/**
Check whether binlog state allows to safely release MDL locks after
rollback to savepoint.
@param hton The binlog handlerton.
@param thd The client thread that executes the transaction.
@return true - It is safe to release MDL locks.
false - If it is not.
*/
static bool binlog_savepoint_rollback_can_release_mdl(handlerton *hton,
THD *thd)
{
DBUG_ENTER("binlog_savepoint_rollback_can_release_mdl");
/*
If we have not updated any non-transactional tables rollback
to savepoint will simply truncate binlog cache starting from
SAVEPOINT command. So it should be safe to release MDL acquired
after SAVEPOINT command in this case.
*/
DBUG_RETURN(!trans_cannot_safely_rollback(thd, true));
}
int check_binlog_magic(IO_CACHE* log, const char** errmsg)
{
uchar magic[4];
DBUG_ASSERT(my_b_tell(log) == 0);
if (my_b_read(log, magic, sizeof(magic)))
{
*errmsg = "I/O error reading the header from the binary log";
sql_print_error("%s, errno=%d, io cache code=%d", *errmsg, my_errno,
log->error);
return 1;
}
if (bcmp(magic, BINLOG_MAGIC, sizeof(magic)))
{
*errmsg = "Binlog has bad magic number; It's not a binary log file that can be used by this version of MySQL";
return 1;
}
return 0;
}
File open_binlog(IO_CACHE *log, const char *log_file_name, const char **errmsg)
{
File file;
DBUG_ENTER("open_binlog");
if ((file= mysql_file_open(key_file_binlog,
log_file_name, O_RDONLY | O_BINARY | O_SHARE,
MYF(MY_WME))) < 0)
{
sql_print_error("Failed to open log (file '%s', errno %d)",
log_file_name, my_errno);
*errmsg = "Could not open log file";
goto err;
}
if (init_io_cache(log, file, IO_SIZE*2, READ_CACHE, 0, 0,
MYF(MY_WME|MY_DONT_CHECK_FILESIZE)))
{
sql_print_error("Failed to create a cache on log (file '%s')",
log_file_name);
*errmsg = "Could not open log file";
goto err;
}
if (check_binlog_magic(log,errmsg))
goto err;
DBUG_RETURN(file);
err:
if (file >= 0)
{
mysql_file_close(file, MYF(0));
end_io_cache(log);
}
DBUG_RETURN(-1);
}
#ifdef _WIN32
static int eventSource = 0;
static void setup_windows_event_source()
{
HKEY hRegKey= NULL;
DWORD dwError= 0;
TCHAR szPath[MAX_PATH];
DWORD dwTypes;
if (eventSource) // Ensure that we are only called once
return;
eventSource= 1;
// Create the event source registry key
dwError= RegCreateKey(HKEY_LOCAL_MACHINE,
"SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\MySQL",
&hRegKey);
/* Name of the PE module that contains the message resource */
GetModuleFileName(NULL, szPath, MAX_PATH);
/* Register EventMessageFile */
dwError = RegSetValueEx(hRegKey, "EventMessageFile", 0, REG_EXPAND_SZ,
(PBYTE) szPath, (DWORD) (strlen(szPath) + 1));
/* Register supported event types */
dwTypes= (EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE |
EVENTLOG_INFORMATION_TYPE);
dwError= RegSetValueEx(hRegKey, "TypesSupported", 0, REG_DWORD,
(LPBYTE) &dwTypes, sizeof dwTypes);
RegCloseKey(hRegKey);
}
#endif /* _WIN32 */
/**
Find a unique filename for 'filename.#'.
Set '#' to the number next to the maximum found in the most
recent log file extension.
This function will return nonzero if: (i) the generated name
exceeds FN_REFLEN; (ii) if the number of extensions is exhausted;
or (iii) some other error happened while examining the filesystem.
@return
nonzero if not possible to get unique filename.
*/
static int find_uniq_filename(char *name, ulong next_log_number)
{
uint i;
char buff[FN_REFLEN], ext_buf[FN_REFLEN];
struct st_my_dir *dir_info;
reg1 struct fileinfo *file_info;
ulong max_found, next, number;
size_t buf_length, length;
char *start, *end;
int error= 0;
DBUG_ENTER("find_uniq_filename");
length= dirname_part(buff, name, &buf_length);
start= name + length;
end= strend(start);
*end='.';
length= (size_t) (end - start + 1);
if ((DBUG_EVALUATE_IF("error_unique_log_filename", 1,
!(dir_info= my_dir(buff,MYF(MY_DONT_SORT))))))
{ // This shouldn't happen
strmov(end,".1"); // use name+1
DBUG_RETURN(1);
}
file_info= dir_info->dir_entry;
max_found= next_log_number ? next_log_number-1 : 0;
for (i= dir_info->number_of_files ; i-- ; file_info++)
{
if (strncmp(file_info->name, start, length) == 0 &&
test_if_number(file_info->name+length, &number,0))
{
set_if_bigger(max_found,(ulong) number);
}
}
my_dirend(dir_info);
/* check if reached the maximum possible extension number */
if (max_found >= MAX_LOG_UNIQUE_FN_EXT)
{
sql_print_error("Log filename extension number exhausted: %06lu. \
Please fix this by archiving old logs and \
updating the index files.", max_found);
error= 1;
goto end;
}
next= max_found + 1;
if (sprintf(ext_buf, "%06lu", next)<0)
{
error= 1;
goto end;
}
*end++='.';
/*
Check if the generated extension size + the file name exceeds the
buffer size used. If one did not check this, then the filename might be
truncated, resulting in error.
*/
if (((strlen(ext_buf) + (end - name)) >= FN_REFLEN))
{
sql_print_error("Log filename too large: %s%s (%zu). \
Please fix this by archiving old logs and updating the \
index files.", name, ext_buf, (strlen(ext_buf) + (end - name)));
error= 1;
goto end;
}
if (sprintf(end, "%06lu", next)<0)
{
error= 1;
goto end;
}
/* print warning if reaching the end of available extensions. */
if ((next > (MAX_LOG_UNIQUE_FN_EXT - LOG_WARN_UNIQUE_FN_EXT_LEFT)))
sql_print_warning("Next log extension: %lu. \
Remaining log filename extensions: %lu. \
Please consider archiving some logs.", next, (MAX_LOG_UNIQUE_FN_EXT - next));
end:
DBUG_RETURN(error);
}
void MYSQL_LOG::init(enum_log_type log_type_arg,
enum cache_type io_cache_type_arg)
{
DBUG_ENTER("MYSQL_LOG::init");
log_type= log_type_arg;
io_cache_type= io_cache_type_arg;
DBUG_PRINT("info",("log_type: %d", log_type));
DBUG_VOID_RETURN;
}
bool MYSQL_LOG::init_and_set_log_file_name(const char *log_name,
const char *new_name,
ulong next_log_number,
enum_log_type log_type_arg,
enum cache_type io_cache_type_arg)
{
init(log_type_arg, io_cache_type_arg);
if (new_name)
{
strmov(log_file_name, new_name);
}
else if (!new_name && generate_new_name(log_file_name, log_name,
next_log_number))
return TRUE;
return FALSE;
}
/*
Open a (new) log file.
SYNOPSIS
open()
log_name The name of the log to open
log_type_arg The type of the log. E.g. LOG_NORMAL
new_name The new name for the logfile. This is only needed
when the method is used to open the binlog file.
io_cache_type_arg The type of the IO_CACHE to use for this log file
DESCRIPTION
Open the logfile, init IO_CACHE and write startup messages
(in case of general and slow query logs).
RETURN VALUES
0 ok
1 error
*/
bool MYSQL_LOG::open(
#ifdef HAVE_PSI_INTERFACE
PSI_file_key log_file_key,
#endif
const char *log_name, enum_log_type log_type_arg,
const char *new_name, ulong next_log_number,
enum cache_type io_cache_type_arg)
{
char buff[FN_REFLEN];
MY_STAT f_stat;
File file= -1;
my_off_t seek_offset;
bool is_fifo = false;
int open_flags= O_CREAT | O_BINARY;
DBUG_ENTER("MYSQL_LOG::open");
DBUG_PRINT("enter", ("log_type: %d", (int) log_type_arg));
write_error= 0;
if (!(name= my_strdup(log_name, MYF(MY_WME))))
{
name= (char *)log_name; // for the error message
goto err;
}
/*
log_type is LOG_UNKNOWN if we should not generate a new name
This is only used when called from MYSQL_BINARY_LOG::open, which
has already updated log_file_name.
*/
if (log_type_arg != LOG_UNKNOWN &&
init_and_set_log_file_name(name, new_name, next_log_number,
log_type_arg, io_cache_type_arg))
goto err;
is_fifo = my_stat(log_file_name, &f_stat, MYF(0)) &&
MY_S_ISFIFO(f_stat.st_mode);
if (io_cache_type == SEQ_READ_APPEND)
open_flags |= O_RDWR | O_APPEND;
else
open_flags |= O_WRONLY | (log_type == LOG_BIN ? 0 : O_APPEND);
if (is_fifo)
open_flags |= O_NONBLOCK;
db[0]= 0;
#ifdef HAVE_PSI_INTERFACE
/* Keep the key for reopen */
m_log_file_key= log_file_key;
#endif
if ((file= mysql_file_open(log_file_key, log_file_name, open_flags,
MYF(MY_WME | ME_WAITTANG))) < 0)
goto err;
if (is_fifo)
seek_offset= 0;
else if ((seek_offset= mysql_file_tell(file, MYF(MY_WME))))
goto err;
if (init_io_cache(&log_file, file, IO_SIZE, io_cache_type, seek_offset, 0,
MYF(MY_WME | MY_NABP |
((log_type == LOG_BIN) ? MY_WAIT_IF_FULL : 0))))
goto err;
if (log_type == LOG_NORMAL)
{
char *end;
int len=my_snprintf(buff, sizeof(buff), "%s, Version: %s (%s). "
#ifdef EMBEDDED_LIBRARY
"embedded library\n",
my_progname, server_version, MYSQL_COMPILATION_COMMENT
#elif _WIN32
"started with:\nTCP Port: %d, Named Pipe: %s\n",
my_progname, server_version, MYSQL_COMPILATION_COMMENT,
mysqld_port, mysqld_unix_port
#else
"started with:\nTcp port: %d Unix socket: %s\n",
my_progname, server_version, MYSQL_COMPILATION_COMMENT,
mysqld_port, mysqld_unix_port
#endif
);
end= strnmov(buff + len, "Time Id Command Argument\n",
sizeof(buff) - len);
if (my_b_write(&log_file, (uchar*) buff, (uint) (end-buff)) ||
flush_io_cache(&log_file))
goto err;
}
log_state= LOG_OPENED;
DBUG_RETURN(0);
err:
sql_print_error("Could not use %s for logging (error %d). \
Turning logging off for the whole duration of the MySQL server process. \
To turn it on again: fix the cause, \
shutdown the MySQL server and restart it.", name, errno);
if (file >= 0)
mysql_file_close(file, MYF(0));
end_io_cache(&log_file);
my_free(name);
name= NULL;
log_state= LOG_CLOSED;
DBUG_RETURN(1);
}
MYSQL_LOG::MYSQL_LOG()
: name(0), write_error(FALSE), inited(FALSE), log_type(LOG_UNKNOWN),
log_state(LOG_CLOSED)
{
/*
We don't want to initialize LOCK_Log here as such initialization depends on
safe_mutex (when using safe_mutex) which depends on MY_INIT(), which is
called only in main(). Doing initialization here would make it happen
before main().
*/
bzero((char*) &log_file, sizeof(log_file));
}
void MYSQL_LOG::init_pthread_objects()
{
DBUG_ASSERT(inited == 0);
inited= 1;
mysql_mutex_init(key_LOG_LOCK_log, &LOCK_log, MY_MUTEX_INIT_SLOW);
}
/*
Close the log file
SYNOPSIS
close()
exiting Bitmask. LOG_CLOSE_TO_BE_OPENED is used if we intend to call
open at once after close. LOG_CLOSE_DELAYED_CLOSE is used for
binlog rotation, to delay actual close of the old file until
we have successfully created the new file.
NOTES
One can do an open on the object at once after doing a close.
The internal structures are not freed until cleanup() is called
*/
void MYSQL_LOG::close(uint exiting)
{ // One can't set log_type here!
DBUG_ENTER("MYSQL_LOG::close");
DBUG_PRINT("enter",("exiting: %d", (int) exiting));
if (log_state == LOG_OPENED)
{
end_io_cache(&log_file);
if (log_type == LOG_BIN && mysql_file_sync(log_file.file, MYF(MY_WME)) && ! write_error)
{
write_error= 1;
sql_print_error(ER_THD_OR_DEFAULT(current_thd, ER_ERROR_ON_WRITE), name, errno);
}
if (!(exiting & LOG_CLOSE_DELAYED_CLOSE) &&
mysql_file_close(log_file.file, MYF(MY_WME)) && ! write_error)
{
write_error= 1;
sql_print_error(ER_THD_OR_DEFAULT(current_thd, ER_ERROR_ON_WRITE), name, errno);
}
}
log_state= (exiting & LOG_CLOSE_TO_BE_OPENED) ? LOG_TO_BE_OPENED : LOG_CLOSED;
my_free(name);
name= NULL;
DBUG_VOID_RETURN;
}
/** This is called only once. */
void MYSQL_LOG::cleanup()
{
DBUG_ENTER("cleanup");
if (inited)
{
inited= 0;
mysql_mutex_destroy(&LOCK_log);
close(0);
}
DBUG_VOID_RETURN;
}
int MYSQL_LOG::generate_new_name(char *new_name, const char *log_name,
ulong next_log_number)
{
fn_format(new_name, log_name, mysql_data_home, "", 4);
if (log_type == LOG_BIN)
{
if (!fn_ext(log_name)[0])
{
if (DBUG_EVALUATE_IF("binlog_inject_new_name_error", TRUE, FALSE) ||
find_uniq_filename(new_name, next_log_number))
{
THD *thd= current_thd;
if (thd)
my_error(ER_NO_UNIQUE_LOGFILE, MYF(ME_FATALERROR), log_name);
sql_print_error(ER_DEFAULT(ER_NO_UNIQUE_LOGFILE), log_name);
return 1;
}
}
}
return 0;
}
/*
Reopen the log file
SYNOPSIS
reopen_file()
DESCRIPTION
Reopen the log file. The method is used during FLUSH LOGS
and locks LOCK_log mutex
*/
void MYSQL_QUERY_LOG::reopen_file()
{
char *save_name;
DBUG_ENTER("MYSQL_LOG::reopen_file");
mysql_mutex_lock(&LOCK_log);
if (!is_open())
{
DBUG_PRINT("info",("log is closed"));
mysql_mutex_unlock(&LOCK_log);
DBUG_VOID_RETURN;
}
save_name= name;
name= 0; // Don't free name
close(LOG_CLOSE_TO_BE_OPENED);
/*
Note that at this point, log_state != LOG_CLOSED (important for is_open()).
*/
open(
#ifdef HAVE_PSI_INTERFACE
m_log_file_key,
#endif
save_name, log_type, 0, 0, io_cache_type);
my_free(save_name);
mysql_mutex_unlock(&LOCK_log);
DBUG_VOID_RETURN;
}
/*
Write a command to traditional general log file
SYNOPSIS
write()
event_time command start timestamp
user_host the pointer to the string with user@host info
user_host_len length of the user_host string. this is computed once
and passed to all general log event handlers
thread_id Id of the thread, issued a query
command_type the type of the command being logged
command_type_len the length of the string above
sql_text the very text of the query being executed
sql_text_len the length of sql_text string
DESCRIPTION
Log given command to to normal (not rotable) log file
RETURN
FASE - OK
TRUE - error occurred
*/
bool MYSQL_QUERY_LOG::write(time_t event_time, const char *user_host,
uint user_host_len, my_thread_id thread_id_arg,
const char *command_type, uint command_type_len,
const char *sql_text, uint sql_text_len)
{
char buff[32];
char local_time_buff[MAX_TIME_SIZE];
struct tm start;
uint time_buff_len= 0;
mysql_mutex_lock(&LOCK_log);
/* Test if someone closed between the is_open test and lock */
if (is_open())
{
/* for testing output of timestamp and thread id */
DBUG_EXECUTE_IF("reset_log_last_time", last_time= 0;);
/* Note that my_b_write() assumes it knows the length for this */
if (event_time != last_time)
{
last_time= event_time;
localtime_r(&event_time, &start);
time_buff_len= my_snprintf(local_time_buff, MAX_TIME_SIZE,
"%02d%02d%02d %2d:%02d:%02d\t",
start.tm_year % 100, start.tm_mon + 1,
start.tm_mday, start.tm_hour,
start.tm_min, start.tm_sec);
if (my_b_write(&log_file, (uchar*) local_time_buff, time_buff_len))
goto err;
}
else
if (my_b_write(&log_file, (uchar*) "\t\t" ,2) < 0)
goto err;
/* command_type, thread_id */
size_t length= my_snprintf(buff, 32, "%5llu ", thread_id_arg);
if (my_b_write(&log_file, (uchar*) buff, length))
goto err;
if (my_b_write(&log_file, (uchar*) command_type, command_type_len))
goto err;
if (my_b_write(&log_file, (uchar*) "\t", 1))
goto err;
/* sql_text */
if (my_b_write(&log_file, (uchar*) sql_text, sql_text_len))
goto err;
if (my_b_write(&log_file, (uchar*) "\n", 1) ||
flush_io_cache(&log_file))
goto err;
}
mysql_mutex_unlock(&LOCK_log);
return FALSE;
err:
if (!write_error)
{
write_error= 1;
sql_print_error(ER(ER_ERROR_ON_WRITE), name, errno);
}
mysql_mutex_unlock(&LOCK_log);
return TRUE;
}
/*
Log a query to the traditional slow log file
SYNOPSIS
write()
thd THD of the query
current_time current timestamp
user_host the pointer to the string with user@host info
user_host_len length of the user_host string. this is computed once
and passed to all general log event handlers
query_utime Amount of time the query took to execute (in microseconds)
lock_utime Amount of time the query was locked (in microseconds)
is_command The flag, which determines, whether the sql_text is a
query or an administrator command.
sql_text the very text of the query or administrator command
processed
sql_text_len the length of sql_text string
DESCRIPTION
Log a query to the slow log file.
RETURN
FALSE - OK
TRUE - error occurred
*/
bool MYSQL_QUERY_LOG::write(THD *thd, time_t current_time,
const char *user_host,
uint user_host_len, ulonglong query_utime,
ulonglong lock_utime, bool is_command,
const char *sql_text, uint sql_text_len)
{
bool error= 0;
DBUG_ENTER("MYSQL_QUERY_LOG::write");
mysql_mutex_lock(&LOCK_log);
if (is_open())
{ // Safety agains reopen
int tmp_errno= 0;
char buff[80], *end;
char query_time_buff[22+7], lock_time_buff[22+7];
size_t buff_len;
end= buff;
if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
{
if (current_time != last_time)
{
last_time= current_time;
struct tm start;
localtime_r(&current_time, &start);
buff_len= my_snprintf(buff, sizeof buff,
"# Time: %02d%02d%02d %2d:%02d:%02d\n",
start.tm_year % 100, start.tm_mon + 1,
start.tm_mday, start.tm_hour,
start.tm_min, start.tm_sec);
/* Note that my_b_write() assumes it knows the length for this */
if (my_b_write(&log_file, (uchar*) buff, buff_len))
tmp_errno= errno;
}
const uchar uh[]= "# User@Host: ";
if (my_b_write(&log_file, uh, sizeof(uh) - 1))
tmp_errno= errno;
if (my_b_write(&log_file, (uchar*) user_host, user_host_len))
tmp_errno= errno;
if (my_b_write(&log_file, (uchar*) "\n", 1))
tmp_errno= errno;
}
/* For slow query log */
sprintf(query_time_buff, "%.6f", ulonglong2double(query_utime)/1000000.0);
sprintf(lock_time_buff, "%.6f", ulonglong2double(lock_utime)/1000000.0);
if (my_b_printf(&log_file,
"# Thread_id: %lu Schema: %s QC_hit: %s\n" \
"# Query_time: %s Lock_time: %s Rows_sent: %lu Rows_examined: %lu\n" \
"# Rows_affected: %lu\n",
(ulong) thd->thread_id, (thd->db ? thd->db : ""),
((thd->query_plan_flags & QPLAN_QC) ? "Yes" : "No"),
query_time_buff, lock_time_buff,
(ulong) thd->get_sent_row_count(),
(ulong) thd->get_examined_row_count(),
thd->get_stmt_da()->is_ok() ?
(ulong) thd->get_stmt_da()->affected_rows() :
0) == (size_t) -1)
tmp_errno= errno;
if ((thd->variables.log_slow_verbosity & LOG_SLOW_VERBOSITY_QUERY_PLAN) &&
(thd->query_plan_flags &
(QPLAN_FULL_SCAN | QPLAN_FULL_JOIN | QPLAN_TMP_TABLE |
QPLAN_TMP_DISK | QPLAN_FILESORT | QPLAN_FILESORT_DISK)) &&
my_b_printf(&log_file,
"# Full_scan: %s Full_join: %s "
"Tmp_table: %s Tmp_table_on_disk: %s\n"
"# Filesort: %s Filesort_on_disk: %s Merge_passes: %lu "
"Priority_queue: %s\n",
((thd->query_plan_flags & QPLAN_FULL_SCAN) ? "Yes" : "No"),
((thd->query_plan_flags & QPLAN_FULL_JOIN) ? "Yes" : "No"),
((thd->query_plan_flags & QPLAN_TMP_TABLE) ? "Yes" : "No"),
((thd->query_plan_flags & QPLAN_TMP_DISK) ? "Yes" : "No"),
((thd->query_plan_flags & QPLAN_FILESORT) ? "Yes" : "No"),
((thd->query_plan_flags & QPLAN_FILESORT_DISK) ?
"Yes" : "No"),
thd->query_plan_fsort_passes,
((thd->query_plan_flags & QPLAN_FILESORT_PRIORITY_QUEUE) ?
"Yes" : "No")
) == (size_t) -1)
tmp_errno= errno;
if (thd->variables.log_slow_verbosity & LOG_SLOW_VERBOSITY_EXPLAIN &&
thd->lex->explain)
{
StringBuffer<128> buf;
DBUG_ASSERT(!thd->free_list);
if (!print_explain_for_slow_log(thd->lex, thd, &buf))
my_b_printf(&log_file, "%s", buf.c_ptr_safe());
thd->free_items();
}
if (thd->db && strcmp(thd->db, db))
{ // Database changed
if (my_b_printf(&log_file,"use %s;\n",thd->db) == (size_t) -1)
tmp_errno= errno;
strmov(db,thd->db);
}
if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
{
end=strmov(end, ",last_insert_id=");
end=longlong10_to_str((longlong)
thd->first_successful_insert_id_in_prev_stmt_for_binlog,
end, -10);
}
// Save value if we do an insert.
if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
{
if (!(specialflag & SPECIAL_SHORT_LOG_FORMAT))
{
end=strmov(end,",insert_id=");
end=longlong10_to_str((longlong)
thd->auto_inc_intervals_in_cur_stmt_for_binlog.minimum(),
end, -10);
}
}
/*
This info used to show up randomly, depending on whether the query
checked the query start time or not. now we always write current
timestamp to the slow log
*/
end= strmov(end, ",timestamp=");
end= int10_to_str((long) current_time, end, 10);
if (end != buff)
{
*end++=';';
*end='\n';
if (my_b_write(&log_file, (uchar*) "SET ", 4) ||
my_b_write(&log_file, (uchar*) buff + 1, (uint) (end-buff)))
tmp_errno= errno;
}
if (is_command)
{
end= strxmov(buff, "# administrator command: ", NullS);
buff_len= (ulong) (end - buff);
DBUG_EXECUTE_IF("simulate_slow_log_write_error",
{DBUG_SET("+d,simulate_file_write_error");});
if(my_b_write(&log_file, (uchar*) buff, buff_len))
tmp_errno= errno;
}
if (my_b_write(&log_file, (uchar*) sql_text, sql_text_len) ||
my_b_write(&log_file, (uchar*) ";\n",2) ||
flush_io_cache(&log_file))
tmp_errno= errno;
if (tmp_errno)
{
error= 1;
if (! write_error)
{
write_error= 1;
sql_print_error(ER_THD(thd, ER_ERROR_ON_WRITE), name, tmp_errno);
}
}
}
mysql_mutex_unlock(&LOCK_log);
DBUG_RETURN(error);
}
/**
@todo
The following should be using fn_format(); We just need to
first change fn_format() to cut the file name if it's too long.
*/
const char *MYSQL_LOG::generate_name(const char *log_name,
const char *suffix,
bool strip_ext, char *buff)
{
if (!log_name || !log_name[0])
{
strmake(buff, pidfile_name, FN_REFLEN - strlen(suffix) - 1);
return (const char *)
fn_format(buff, buff, "", suffix, MYF(MY_REPLACE_EXT|MY_REPLACE_DIR));
}
// get rid of extension if the log is binary to avoid problems
if (strip_ext)
{
char *p= fn_ext(log_name);
uint length= (uint) (p - log_name);
strmake(buff, log_name, MY_MIN(length, FN_REFLEN-1));
return (const char*)buff;
}
return log_name;
}
/*
Print some additional information about addition/removal of
XID list entries.
TODO: Remove once MDEV-9510 is fixed.
*/
#ifdef WITH_WSREP
#define WSREP_XID_LIST_ENTRY(X, Y) \
if (wsrep_debug) \
{ \
char buf[FN_REFLEN]; \
strmake(buf, Y->binlog_name, Y->binlog_name_len); \
WSREP_DEBUG(X, buf, Y->binlog_id); \
}
#else
#define WSREP_XID_LIST_ENTRY(X, Y) do { } while(0)
#endif
MYSQL_BIN_LOG::MYSQL_BIN_LOG(uint *sync_period)
:reset_master_pending(0), mark_xid_done_waiting(0),
bytes_written(0), file_id(1), open_count(1),
group_commit_queue(0), group_commit_queue_busy(FALSE),
num_commits(0), num_group_commits(0),
group_commit_trigger_count(0), group_commit_trigger_timeout(0),
group_commit_trigger_lock_wait(0),
sync_period_ptr(sync_period), sync_counter(0),
state_file_deleted(false), binlog_state_recover_done(false),
is_relay_log(0), signal_cnt(0),
checksum_alg_reset(BINLOG_CHECKSUM_ALG_UNDEF),
relay_log_checksum_alg(BINLOG_CHECKSUM_ALG_UNDEF),
description_event_for_exec(0), description_event_for_queue(0),
current_binlog_id(0)
{
/*
We don't want to initialize locks here as such initialization depends on
safe_mutex (when using safe_mutex) which depends on MY_INIT(), which is
called only in main(). Doing initialization here would make it happen
before main().
*/
index_file_name[0] = 0;
bzero((char*) &index_file, sizeof(index_file));
bzero((char*) &purge_index_file, sizeof(purge_index_file));
}
void MYSQL_BIN_LOG::stop_background_thread()
{
if (binlog_background_thread_started)
{
mysql_mutex_lock(&LOCK_binlog_background_thread);
binlog_background_thread_stop= true;
mysql_cond_signal(&COND_binlog_background_thread);
while (binlog_background_thread_stop)
mysql_cond_wait(&COND_binlog_background_thread_end,
&LOCK_binlog_background_thread);
mysql_mutex_unlock(&LOCK_binlog_background_thread);
binlog_background_thread_started= false;
}
}
/* this is called only once */
void MYSQL_BIN_LOG::cleanup()
{
DBUG_ENTER("cleanup");
if (inited)
{
xid_count_per_binlog *b;
/* Wait for the binlog background thread to stop. */
if (!is_relay_log)
stop_background_thread();
inited= 0;
mysql_mutex_lock(&LOCK_log);
close(LOG_CLOSE_INDEX|LOG_CLOSE_STOP_EVENT);
mysql_mutex_unlock(&LOCK_log);
delete description_event_for_queue;
delete description_event_for_exec;
while ((b= binlog_xid_count_list.get()))
{
/*
There should be no pending XIDs at shutdown, and only one entry (for
the active binlog file) in the list.
*/
DBUG_ASSERT(b->xid_count == 0);
DBUG_ASSERT(!binlog_xid_count_list.head());
WSREP_XID_LIST_ENTRY("MYSQL_BIN_LOG::cleanup(): Removing xid_list_entry "
"for %s (%lu)", b);
my_free(b);
}
mysql_mutex_destroy(&LOCK_log);
mysql_mutex_destroy(&LOCK_index);
mysql_mutex_destroy(&LOCK_xid_list);
mysql_mutex_destroy(&LOCK_binlog_background_thread);
mysql_mutex_destroy(&LOCK_binlog_end_pos);
mysql_cond_destroy(&update_cond);
mysql_cond_destroy(&COND_queue_busy);
mysql_cond_destroy(&COND_xid_list);
mysql_cond_destroy(&COND_binlog_background_thread);
mysql_cond_destroy(&COND_binlog_background_thread_end);
}
/*
Free data for global binlog state.
We can't do that automaticly as we need to do this before
safemalloc is shut down
*/
if (!is_relay_log)
rpl_global_gtid_binlog_state.free();
DBUG_VOID_RETURN;
}
/* Init binlog-specific vars */
void MYSQL_BIN_LOG::init(ulong max_size_arg)
{
DBUG_ENTER("MYSQL_BIN_LOG::init");
max_size= max_size_arg;
DBUG_PRINT("info",("max_size: %lu", max_size));
DBUG_VOID_RETURN;
}
void MYSQL_BIN_LOG::init_pthread_objects()
{
MYSQL_LOG::init_pthread_objects();
mysql_mutex_init(m_key_LOCK_index, &LOCK_index, MY_MUTEX_INIT_SLOW);
mysql_mutex_setflags(&LOCK_index, MYF_NO_DEADLOCK_DETECTION);
mysql_mutex_init(key_BINLOG_LOCK_xid_list,
&LOCK_xid_list, MY_MUTEX_INIT_FAST);
mysql_cond_init(m_key_update_cond, &update_cond, 0);
mysql_cond_init(m_key_COND_queue_busy, &COND_queue_busy, 0);
mysql_cond_init(key_BINLOG_COND_xid_list, &COND_xid_list, 0);
mysql_mutex_init(key_BINLOG_LOCK_binlog_background_thread,
&LOCK_binlog_background_thread, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_BINLOG_COND_binlog_background_thread,
&COND_binlog_background_thread, 0);
mysql_cond_init(key_BINLOG_COND_binlog_background_thread_end,
&COND_binlog_background_thread_end, 0);
mysql_mutex_init(m_key_LOCK_binlog_end_pos, &LOCK_binlog_end_pos,
MY_MUTEX_INIT_SLOW);
}
bool MYSQL_BIN_LOG::open_index_file(const char *index_file_name_arg,
const char *log_name, bool need_mutex)
{
File index_file_nr= -1;
DBUG_ASSERT(!my_b_inited(&index_file));
/*
First open of this class instance
Create an index file that will hold all file names uses for logging.
Add new entries to the end of it.
*/
myf opt= MY_UNPACK_FILENAME;
if (!index_file_name_arg)
{
index_file_name_arg= log_name; // Use same basename for index file
opt= MY_UNPACK_FILENAME | MY_REPLACE_EXT;
}
fn_format(index_file_name, index_file_name_arg, mysql_data_home,
".index", opt);
if ((index_file_nr= mysql_file_open(m_key_file_log_index,
index_file_name,
O_RDWR | O_CREAT | O_BINARY,
MYF(MY_WME))) < 0 ||
mysql_file_sync(index_file_nr, MYF(MY_WME)) ||
init_io_cache(&index_file, index_file_nr,
IO_SIZE, WRITE_CACHE,
mysql_file_seek(index_file_nr, 0L, MY_SEEK_END, MYF(0)),
0, MYF(MY_WME | MY_WAIT_IF_FULL)) ||
DBUG_EVALUATE_IF("fault_injection_openning_index", 1, 0))
{
/*
TODO: all operations creating/deleting the index file or a log, should
call my_sync_dir() or my_sync_dir_by_file() to be durable.
TODO: file creation should be done with mysql_file_create()
not mysql_file_open().
*/
if (index_file_nr >= 0)
mysql_file_close(index_file_nr, MYF(0));
return TRUE;
}
#ifdef HAVE_REPLICATION
/*
Sync the index by purging any binary log file that is not registered.
In other words, either purge binary log files that were removed from
the index but not purged from the file system due to a crash or purge
any binary log file that was created but not register in the index
due to a crash.
*/
if (set_purge_index_file_name(index_file_name_arg) ||
open_purge_index_file(FALSE) ||
purge_index_entry(NULL, NULL, need_mutex) ||
close_purge_index_file() ||
DBUG_EVALUATE_IF("fault_injection_recovering_index", 1, 0))
{
sql_print_error("MYSQL_BIN_LOG::open_index_file failed to sync the index "
"file.");
return TRUE;
}
#endif
return FALSE;
}
/**
Open a (new) binlog file.
- Open the log file and the index file. Register the new
file name in it
- When calling this when the file is in use, you must have a locks
on LOCK_log and LOCK_index.
@retval
0 ok
@retval
1 error
*/
bool MYSQL_BIN_LOG::open(const char *log_name,
enum_log_type log_type_arg,
const char *new_name,
ulong next_log_number,
enum cache_type io_cache_type_arg,
ulong max_size_arg,
bool null_created_arg,
bool need_mutex)
{
File file= -1;
xid_count_per_binlog *new_xid_list_entry= NULL, *b;
DBUG_ENTER("MYSQL_BIN_LOG::open");
DBUG_PRINT("enter",("log_type: %d",(int) log_type_arg));
mysql_mutex_assert_owner(&LOCK_log);
if (!is_relay_log)
{
if (!binlog_state_recover_done)
{
binlog_state_recover_done= true;
if (do_binlog_recovery(opt_bin_logname, false))
DBUG_RETURN(1);
}
if (!binlog_background_thread_started &&
start_binlog_background_thread())
DBUG_RETURN(1);
}
/* We need to calculate new log file name for purge to delete old */
if (init_and_set_log_file_name(log_name, new_name, next_log_number,
log_type_arg, io_cache_type_arg))
{
sql_print_error("MYSQL_BIN_LOG::open failed to generate new file name.");
DBUG_RETURN(1);
}
#ifdef HAVE_REPLICATION
if (open_purge_index_file(TRUE) ||
register_create_index_entry(log_file_name) ||
sync_purge_index_file() ||
DBUG_EVALUATE_IF("fault_injection_registering_index", 1, 0))
{
/**
TODO:
Although this was introduced to appease valgrind when
injecting emulated faults using
fault_injection_registering_index it may be good to consider
what actually happens when open_purge_index_file succeeds but
register or sync fails.
Perhaps we might need the code below in MYSQL_LOG_BIN::cleanup
for "real life" purposes as well?
*/
DBUG_EXECUTE_IF("fault_injection_registering_index", {
if (my_b_inited(&purge_index_file))
{
end_io_cache(&purge_index_file);
my_close(purge_index_file.file, MYF(0));
}
});
sql_print_error("MYSQL_BIN_LOG::open failed to sync the index file.");
DBUG_RETURN(1);
}
DBUG_EXECUTE_IF("crash_create_non_critical_before_update_index", DBUG_SUICIDE(););
#endif
write_error= 0;
/* open the main log file */
if (MYSQL_LOG::open(
#ifdef HAVE_PSI_INTERFACE
m_key_file_log,
#endif
log_name,
LOG_UNKNOWN, /* Don't generate new name */
0, 0, io_cache_type_arg))
{
#ifdef HAVE_REPLICATION
close_purge_index_file();
#endif
DBUG_RETURN(1); /* all warnings issued */
}
init(max_size_arg);
open_count++;
DBUG_ASSERT(log_type == LOG_BIN);
{
bool write_file_name_to_index_file=0;
if (!my_b_filelength(&log_file))
{
/*
The binary log file was empty (probably newly created)
This is the normal case and happens when the user doesn't specify
an extension for the binary log files.
In this case we write a standard header to it.
*/
if (my_b_safe_write(&log_file, BINLOG_MAGIC,
BIN_LOG_HEADER_SIZE))
goto err;
bytes_written+= BIN_LOG_HEADER_SIZE;
write_file_name_to_index_file= 1;
}
{
/*
In 4.x we put Start event only in the first binlog. But from 5.0 we
want a Start event even if this is not the very first binlog.
*/
Format_description_log_event s(BINLOG_VERSION);
/*
don't set LOG_EVENT_BINLOG_IN_USE_F for SEQ_READ_APPEND io_cache
as we won't be able to reset it later
*/
if (io_cache_type == WRITE_CACHE)
s.flags |= LOG_EVENT_BINLOG_IN_USE_F;
if (is_relay_log)
{
if (relay_log_checksum_alg == BINLOG_CHECKSUM_ALG_UNDEF)
relay_log_checksum_alg=
opt_slave_sql_verify_checksum ? (enum_binlog_checksum_alg) binlog_checksum_options
: BINLOG_CHECKSUM_ALG_OFF;
s.checksum_alg= relay_log_checksum_alg;
}
else
s.checksum_alg= (enum_binlog_checksum_alg)binlog_checksum_options;
crypto.scheme = 0;
DBUG_ASSERT(s.checksum_alg != BINLOG_CHECKSUM_ALG_UNDEF);
if (!s.is_valid())
goto err;
s.dont_set_created= null_created_arg;
if (write_event(&s))
goto err;
bytes_written+= s.data_written;
if (encrypt_binlog)
{
uint key_version= encryption_key_get_latest_version(ENCRYPTION_KEY_SYSTEM_DATA);
if (key_version == ENCRYPTION_KEY_VERSION_INVALID)
{
sql_print_error("Failed to enable encryption of binary logs");
goto err;
}
if (key_version != ENCRYPTION_KEY_NOT_ENCRYPTED)
{
if (my_random_bytes(crypto.nonce, sizeof(crypto.nonce)))
goto err;
Start_encryption_log_event sele(1, key_version, crypto.nonce);
sele.checksum_alg= s.checksum_alg;
if (write_event(&sele))
goto err;
// Start_encryption_log_event is written, enable the encryption
if (crypto.init(sele.crypto_scheme, key_version))
goto err;
}
}
if (!is_relay_log)
{
char buf[FN_REFLEN];
/*
Output a Gtid_list_log_event at the start of the binlog file.
This is used to quickly determine which GTIDs are found in binlog
files earlier than this one, and which are found in this (or later)
binlogs.
The list gives a mapping from (domain_id, server_id) -> seq_no (so
this means that there is at most one entry for every unique pair
(domain_id, server_id) in the list). It indicates that this seq_no is
the last one found in an earlier binlog file for this (domain_id,
server_id) combination - so any higher seq_no should be search for
from this binlog file, or a later one.
This allows to locate the binlog file containing a given GTID by
scanning backwards, reading just the Gtid_list_log_event at the
start of each file, and scanning only the relevant binlog file when
found, not all binlog files.
The existence of a given entry (domain_id, server_id, seq_no)
guarantees only that this seq_no will not be found in this or any
later binlog file. It does not guarantee that it can be found it an
earlier binlog file, for example the file may have been purged.
If there is no entry for a given (domain_id, server_id) pair, then
it means that no such GTID exists in any earlier binlog. It is
permissible to remove such pair from future Gtid_list_log_events
if all previous binlog files containing such GTIDs have been purged
(though such optimization is not performed at the time of this
writing). So if there is no entry for given GTID it means that such
GTID should be search for in this or later binlog file, same as if
there had been an entry (domain_id, server_id, 0).
*/
Gtid_list_log_event gl_ev(&rpl_global_gtid_binlog_state, 0);
if (write_event(&gl_ev))
goto err;
/* Output a binlog checkpoint event at the start of the binlog file. */
/*
Construct an entry in the binlog_xid_count_list for the new binlog
file (we will not link it into the list until we know the new file
is successfully created; otherwise we would have to remove it again
if creation failed, which gets tricky since other threads may have
seen the entry in the meantime - and we do not want to hold
LOCK_xid_list for long periods of time).
Write the current binlog checkpoint into the log, so XA recovery will
know from where to start recovery.
*/
uint off= dirname_length(log_file_name);
uint len= strlen(log_file_name) - off;
char *entry_mem, *name_mem;
if (!(new_xid_list_entry = (xid_count_per_binlog *)
my_multi_malloc(MYF(MY_WME),
&entry_mem, sizeof(xid_count_per_binlog),
&name_mem, len,
NULL)))
goto err;
memcpy(name_mem, log_file_name+off, len);
new_xid_list_entry->binlog_name= name_mem;
new_xid_list_entry->binlog_name_len= len;
new_xid_list_entry->xid_count= 0;
/*
Find the name for the Initial binlog checkpoint.
Normally this will just be the first entry, as we delete entries
when their count drops to zero. But we scan the list to handle any
corner case, eg. for the first binlog file opened after startup, the
list will be empty.
*/
mysql_mutex_lock(&LOCK_xid_list);
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
while ((b= it++) && b->xid_count == 0)
;
mysql_mutex_unlock(&LOCK_xid_list);
if (!b)
b= new_xid_list_entry;
strmake(buf, b->binlog_name, b->binlog_name_len);
Binlog_checkpoint_log_event ev(buf, len);
DBUG_EXECUTE_IF("crash_before_write_checkpoint_event",
flush_io_cache(&log_file);
mysql_file_sync(log_file.file, MYF(MY_WME));
DBUG_SUICIDE(););
if (write_event(&ev))
goto err;
bytes_written+= ev.data_written;
}
}
if (description_event_for_queue &&
description_event_for_queue->binlog_version>=4)
{
/*
This is a relay log written to by the I/O slave thread.
Write the event so that others can later know the format of this relay
log.
Note that this event is very close to the original event from the
master (it has binlog version of the master, event types of the
master), so this is suitable to parse the next relay log's event. It
has been produced by
Format_description_log_event::Format_description_log_event(char* buf,).
Why don't we want to write the description_event_for_queue if this
event is for format<4 (3.23 or 4.x): this is because in that case, the
description_event_for_queue describes the data received from the
master, but not the data written to the relay log (*conversion*),
which is in format 4 (slave's).
*/
/*
Set 'created' to 0, so that in next relay logs this event does not
trigger cleaning actions on the slave in
Format_description_log_event::apply_event_impl().
*/
description_event_for_queue->created= 0;
/* Don't set log_pos in event header */
description_event_for_queue->set_artificial_event();
if (write_event(description_event_for_queue))
goto err;
bytes_written+= description_event_for_queue->data_written;
}
if (flush_io_cache(&log_file) ||
mysql_file_sync(log_file.file, MYF(MY_WME|MY_SYNC_FILESIZE)))
goto err;
my_off_t offset= my_b_tell(&log_file);
if (!is_relay_log)
{
/* update binlog_end_pos so that it can be read by after sync hook */
reset_binlog_end_pos(log_file_name, offset);
mysql_mutex_lock(&LOCK_commit_ordered);
strmake_buf(last_commit_pos_file, log_file_name);
last_commit_pos_offset= offset;
mysql_mutex_unlock(&LOCK_commit_ordered);
}
if (write_file_name_to_index_file)
{
#ifdef HAVE_REPLICATION
#ifdef ENABLED_DEBUG_SYNC
if (current_thd)
DEBUG_SYNC(current_thd, "binlog_open_before_update_index");
#endif
DBUG_EXECUTE_IF("crash_create_critical_before_update_index", DBUG_SUICIDE(););
#endif
DBUG_ASSERT(my_b_inited(&index_file) != 0);
reinit_io_cache(&index_file, WRITE_CACHE,
my_b_filelength(&index_file), 0, 0);
/*
As this is a new log file, we write the file name to the index
file. As every time we write to the index file, we sync it.
*/
if (DBUG_EVALUATE_IF("fault_injection_updating_index", 1, 0) ||
my_b_write(&index_file, (uchar*) log_file_name,
strlen(log_file_name)) ||
my_b_write(&index_file, (uchar*) "\n", 1) ||
flush_io_cache(&index_file) ||
mysql_file_sync(index_file.file, MYF(MY_WME|MY_SYNC_FILESIZE)))
goto err;
#ifdef HAVE_REPLICATION
DBUG_EXECUTE_IF("crash_create_after_update_index", DBUG_SUICIDE(););
#endif
}
}
if (!is_relay_log)
{
/*
Now the file was created successfully, so we can link in the entry for
the new binlog file in binlog_xid_count_list.
*/
mysql_mutex_lock(&LOCK_xid_list);
++current_binlog_id;
new_xid_list_entry->binlog_id= current_binlog_id;
/* Remove any initial entries with no pending XIDs. */
while ((b= binlog_xid_count_list.head()) && b->xid_count == 0)
{
WSREP_XID_LIST_ENTRY("MYSQL_BIN_LOG::open(): Removing xid_list_entry for "
"%s (%lu)", b);
my_free(binlog_xid_count_list.get());
}
mysql_cond_broadcast(&COND_xid_list);
WSREP_XID_LIST_ENTRY("MYSQL_BIN_LOG::open(): Adding new xid_list_entry for "
"%s (%lu)", new_xid_list_entry);
binlog_xid_count_list.push_back(new_xid_list_entry);
mysql_mutex_unlock(&LOCK_xid_list);
/*
Now that we have synced a new binlog file with an initial Gtid_list
event, it is safe to delete the binlog state file. We will write out
a new, updated file at shutdown, and if we crash before we can recover
the state from the newly written binlog file.
Since the state file will contain out-of-date data as soon as the first
new GTID is binlogged, it is better to remove it, to avoid any risk of
accidentally reading incorrect data later.
*/
if (!state_file_deleted)
{
char buf[FN_REFLEN];
fn_format(buf, opt_bin_logname, mysql_data_home, ".state",
MY_UNPACK_FILENAME);
my_delete(buf, MY_SYNC_DIR);
state_file_deleted= true;
}
}
log_state= LOG_OPENED;
#ifdef HAVE_REPLICATION
close_purge_index_file();
#endif
DBUG_RETURN(0);
err:
#ifdef HAVE_REPLICATION
if (is_inited_purge_index_file())
purge_index_entry(NULL, NULL, need_mutex);
close_purge_index_file();
#endif
sql_print_error("Could not use %s for logging (error %d). \
Turning logging off for the whole duration of the MySQL server process. \
To turn it on again: fix the cause, \
shutdown the MySQL server and restart it.", name, errno);
if (new_xid_list_entry)
my_free(new_xid_list_entry);
if (file >= 0)
mysql_file_close(file, MYF(0));
close(LOG_CLOSE_INDEX);
DBUG_RETURN(1);
}
int MYSQL_BIN_LOG::get_current_log(LOG_INFO* linfo)
{
mysql_mutex_lock(&LOCK_log);
int ret = raw_get_current_log(linfo);
mysql_mutex_unlock(&LOCK_log);
return ret;
}
int MYSQL_BIN_LOG::raw_get_current_log(LOG_INFO* linfo)
{
mysql_mutex_assert_owner(&LOCK_log);
strmake_buf(linfo->log_file_name, log_file_name);
linfo->pos = my_b_tell(&log_file);
return 0;
}
/**
Move all data up in a file in an filename index file.
We do the copy outside of the IO_CACHE as the cache buffers would just
make things slower and more complicated.
In most cases the copy loop should only do one read.
@param index_file File to move
@param offset Move everything from here to beginning
@note
File will be truncated to be 'offset' shorter or filled up with newlines
@retval
0 ok
*/
#ifdef HAVE_REPLICATION
static bool copy_up_file_and_fill(IO_CACHE *index_file, my_off_t offset)
{
int bytes_read;
my_off_t init_offset= offset;
File file= index_file->file;
uchar io_buf[IO_SIZE*2];
DBUG_ENTER("copy_up_file_and_fill");
for (;; offset+= bytes_read)
{
mysql_file_seek(file, offset, MY_SEEK_SET, MYF(0));
if ((bytes_read= (int) mysql_file_read(file, io_buf, sizeof(io_buf),
MYF(MY_WME)))
< 0)
goto err;
if (!bytes_read)
break; // end of file
mysql_file_seek(file, offset-init_offset, MY_SEEK_SET, MYF(0));
if (mysql_file_write(file, io_buf, bytes_read,
MYF(MY_WME | MY_NABP | MY_WAIT_IF_FULL)))
goto err;
}
/* The following will either truncate the file or fill the end with \n' */
if (mysql_file_chsize(file, offset - init_offset, '\n', MYF(MY_WME)) ||
mysql_file_sync(file, MYF(MY_WME|MY_SYNC_FILESIZE)))
goto err;
/* Reset data in old index cache */
reinit_io_cache(index_file, READ_CACHE, (my_off_t) 0, 0, 1);
DBUG_RETURN(0);
err:
DBUG_RETURN(1);
}
#endif /* HAVE_REPLICATION */
/**
Find the position in the log-index-file for the given log name.
@param linfo Store here the found log file name and position to
the NEXT log file name in the index file.
@param log_name Filename to find in the index file.
Is a null pointer if we want to read the first entry
@param need_lock Set this to 1 if the parent doesn't already have a
lock on LOCK_index
@note
On systems without the truncate function the file will end with one or
more empty lines. These will be ignored when reading the file.
@retval
0 ok
@retval
LOG_INFO_EOF End of log-index-file found
@retval
LOG_INFO_IO Got IO error while reading file
*/
int MYSQL_BIN_LOG::find_log_pos(LOG_INFO *linfo, const char *log_name,
bool need_lock)
{
int error= 0;
char *full_fname= linfo->log_file_name;
char full_log_name[FN_REFLEN], fname[FN_REFLEN];
uint log_name_len= 0, fname_len= 0;
DBUG_ENTER("find_log_pos");
full_log_name[0]= full_fname[0]= 0;
/*
Mutex needed because we need to make sure the file pointer does not
move from under our feet
*/
if (need_lock)
mysql_mutex_lock(&LOCK_index);
mysql_mutex_assert_owner(&LOCK_index);
// extend relative paths for log_name to be searched
if (log_name)
{
if(normalize_binlog_name(full_log_name, log_name, is_relay_log))
{
error= LOG_INFO_EOF;
goto end;
}
}
log_name_len= log_name ? (uint) strlen(full_log_name) : 0;
DBUG_PRINT("enter", ("log_name: %s, full_log_name: %s",
log_name ? log_name : "NULL", full_log_name));
/* As the file is flushed, we can't get an error here */
(void) reinit_io_cache(&index_file, READ_CACHE, (my_off_t) 0, 0, 0);
for (;;)
{
uint length;
my_off_t offset= my_b_tell(&index_file);
DBUG_EXECUTE_IF("simulate_find_log_pos_error",
error= LOG_INFO_EOF; break;);
/* If we get 0 or 1 characters, this is the end of the file */
if ((length= my_b_gets(&index_file, fname, FN_REFLEN)) <= 1)
{
/* Did not find the given entry; Return not found or error */
error= !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
break;
}
if (fname[length-1] != '\n')
continue; // Not a log entry
fname[length-1]= 0; // Remove end \n
// extend relative paths and match against full path
if (normalize_binlog_name(full_fname, fname, is_relay_log))
{
error= LOG_INFO_EOF;
break;
}
fname_len= (uint) strlen(full_fname);
// if the log entry matches, null string matching anything
if (!log_name ||
(log_name_len == fname_len &&
!memcmp(full_fname, full_log_name, log_name_len)))
{
DBUG_PRINT("info", ("Found log file entry"));
linfo->index_file_start_offset= offset;
linfo->index_file_offset = my_b_tell(&index_file);
break;
}
}
end:
if (need_lock)
mysql_mutex_unlock(&LOCK_index);
DBUG_RETURN(error);
}
/**
Find the position in the log-index-file for the given log name.
@param
linfo Store here the next log file name and position to
the file name after that.
@param
need_lock Set this to 1 if the parent doesn't already have a
lock on LOCK_index
@note
- Before calling this function, one has to call find_log_pos()
to set up 'linfo'
- Mutex needed because we need to make sure the file pointer does not move
from under our feet
@retval
0 ok
@retval
LOG_INFO_EOF End of log-index-file found
@retval
LOG_INFO_IO Got IO error while reading file
*/
int MYSQL_BIN_LOG::find_next_log(LOG_INFO* linfo, bool need_lock)
{
int error= 0;
uint length;
char fname[FN_REFLEN];
char *full_fname= linfo->log_file_name;
if (need_lock)
mysql_mutex_lock(&LOCK_index);
mysql_mutex_assert_owner(&LOCK_index);
/* As the file is flushed, we can't get an error here */
(void) reinit_io_cache(&index_file, READ_CACHE, linfo->index_file_offset, 0,
0);
linfo->index_file_start_offset= linfo->index_file_offset;
if ((length=my_b_gets(&index_file, fname, FN_REFLEN)) <= 1)
{
error = !index_file.error ? LOG_INFO_EOF : LOG_INFO_IO;
goto err;
}
if (fname[0] != 0)
{
if(normalize_binlog_name(full_fname, fname, is_relay_log))
{
error= LOG_INFO_EOF;
goto err;
}
length= strlen(full_fname);
}
full_fname[length-1]= 0; // kill \n
linfo->index_file_offset= my_b_tell(&index_file);
err:
if (need_lock)
mysql_mutex_unlock(&LOCK_index);
return error;
}
/**
Delete all logs refered to in the index file.
The new index file will only contain this file.
@param thd Thread id. This can be zero in case of resetting
relay logs
@param create_new_log 1 if we should start writing to a new log file
@param next_log_number min number of next log file to use, if possible.
@note
If not called from slave thread, write start event to new log
@retval
0 ok
@retval
1 error
*/
bool MYSQL_BIN_LOG::reset_logs(THD *thd, bool create_new_log,
rpl_gtid *init_state, uint32 init_state_len,
ulong next_log_number)
{
LOG_INFO linfo;
bool error=0;
int err;
const char* save_name;
DBUG_ENTER("reset_logs");
if (!is_relay_log)
{
if (init_state && !is_empty_state())
{
my_error(ER_BINLOG_MUST_BE_EMPTY, MYF(0));
DBUG_RETURN(1);
}
/*
Mark that a RESET MASTER is in progress.
This ensures that a binlog checkpoint will not try to write binlog
checkpoint events, which would be useless (as we are deleting the binlog
anyway) and could deadlock, as we are holding LOCK_log.
Wait for any mark_xid_done() calls that might be already running to
complete (mark_xid_done_waiting counter to drop to zero); we need to
do this before we take the LOCK_log to not deadlock.
*/
mysql_mutex_lock(&LOCK_xid_list);
reset_master_pending++;
while (mark_xid_done_waiting > 0)
mysql_cond_wait(&COND_xid_list, &LOCK_xid_list);
mysql_mutex_unlock(&LOCK_xid_list);
}
DEBUG_SYNC_C_IF_THD(thd, "reset_logs_after_set_reset_master_pending");
/*
We need to get both locks to be sure that no one is trying to
write to the index log file.
*/
mysql_mutex_lock(&LOCK_log);
mysql_mutex_lock(&LOCK_index);
if (!is_relay_log)
{
/*
We are going to nuke all binary log files.
Without binlog, we cannot XA recover prepared-but-not-committed
transactions in engines. So force a commit checkpoint first.
Note that we take and immediately
release LOCK_after_binlog_sync/LOCK_commit_ordered. This has
the effect to ensure that any on-going group commit (in
trx_group_commit_leader()) has completed before we request the checkpoint,
due to the chaining of LOCK_log and LOCK_commit_ordered in that function.
(We are holding LOCK_log, so no new group commit can start).
Without this, it is possible (though perhaps unlikely) that the RESET
MASTER could run in-between the write to the binlog and the
commit_ordered() in the engine of some transaction, and then a crash
later would leave such transaction not recoverable.
*/
mysql_mutex_lock(&LOCK_after_binlog_sync);
mysql_mutex_lock(&LOCK_commit_ordered);
mysql_mutex_unlock(&LOCK_after_binlog_sync);
mysql_mutex_unlock(&LOCK_commit_ordered);
mark_xids_active(current_binlog_id, 1);
do_checkpoint_request(current_binlog_id);
/* Now wait for all checkpoint requests and pending unlog() to complete. */
mysql_mutex_lock(&LOCK_xid_list);
for (;;)
{
if (is_xidlist_idle_nolock())
break;
/*
Wait until signalled that one more binlog dropped to zero, then check
again.
*/
mysql_cond_wait(&COND_xid_list, &LOCK_xid_list);
}
/*
Now all XIDs are fully flushed to disk, and we are holding LOCK_log so
no new ones will be written. So we can proceed to delete the logs.
*/
mysql_mutex_unlock(&LOCK_xid_list);
}
/*
The following mutex is needed to ensure that no threads call
'delete thd' as we would then risk missing a 'rollback' from this
thread. If the transaction involved MyISAM tables, it should go
into binlog even on rollback.
*/
mysql_mutex_lock(&LOCK_thread_count);
/* Save variables so that we can reopen the log */
save_name=name;
name=0; // Protect against free
close(LOG_CLOSE_TO_BE_OPENED);
/*
First delete all old log files and then update the index file.
As we first delete the log files and do not use sort of logging,
a crash may lead to an inconsistent state where the index has
references to non-existent files.
We need to invert the steps and use the purge_index_file methods
in order to make the operation safe.
*/
if ((err= find_log_pos(&linfo, NullS, 0)) != 0)
{
uint errcode= purge_log_get_error_code(err);
sql_print_error("Failed to locate old binlog or relay log files");
my_message(errcode, ER_THD_OR_DEFAULT(thd, errcode), MYF(0));
error= 1;
goto err;
}
for (;;)
{
if ((error= my_delete(linfo.log_file_name, MYF(0))) != 0)
{
if (my_errno == ENOENT)
{
if (thd)
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_LOG_PURGE_NO_FILE,
ER_THD(thd, ER_LOG_PURGE_NO_FILE),
linfo.log_file_name);
sql_print_information("Failed to delete file '%s'",
linfo.log_file_name);
my_errno= 0;
error= 0;
}
else
{
if (thd)
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with deleting %s; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
linfo.log_file_name);
error= 1;
goto err;
}
}
if (find_next_log(&linfo, 0))
break;
}
if (!is_relay_log)
{
if (init_state)
rpl_global_gtid_binlog_state.load(init_state, init_state_len);
else
rpl_global_gtid_binlog_state.reset();
}
/* Start logging with a new file */
close(LOG_CLOSE_INDEX | LOG_CLOSE_TO_BE_OPENED);
if ((error= my_delete(index_file_name, MYF(0)))) // Reset (open will update)
{
if (my_errno == ENOENT)
{
if (thd)
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_LOG_PURGE_NO_FILE,
ER_THD(thd, ER_LOG_PURGE_NO_FILE),
index_file_name);
sql_print_information("Failed to delete file '%s'",
index_file_name);
my_errno= 0;
error= 0;
}
else
{
if (thd)
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with deleting %s; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
index_file_name);
error= 1;
goto err;
}
}
if (create_new_log && !open_index_file(index_file_name, 0, FALSE))
if ((error= open(save_name, log_type, 0, next_log_number,
io_cache_type, max_size, 0, FALSE)))
goto err;
my_free((void *) save_name);
err:
if (error == 1)
name= const_cast<char*>(save_name);
mysql_mutex_unlock(&LOCK_thread_count);
if (!is_relay_log)
{
xid_count_per_binlog *b;
/*
Remove all entries in the xid_count list except the last.
Normally we will just be deleting all the entries that we waited for to
drop to zero above. But if we fail during RESET MASTER for some reason
then we will not have created any new log file, and we may keep the last
of the old entries.
*/
mysql_mutex_lock(&LOCK_xid_list);
for (;;)
{
b= binlog_xid_count_list.head();
DBUG_ASSERT(b /* List can never become empty. */);
if (b->binlog_id == current_binlog_id)
break;
DBUG_ASSERT(b->xid_count == 0);
WSREP_XID_LIST_ENTRY("MYSQL_BIN_LOG::reset_logs(): Removing "
"xid_list_entry for %s (%lu)", b);
my_free(binlog_xid_count_list.get());
}
mysql_cond_broadcast(&COND_xid_list);
reset_master_pending--;
mysql_mutex_unlock(&LOCK_xid_list);
}
mysql_mutex_unlock(&LOCK_index);
mysql_mutex_unlock(&LOCK_log);
DBUG_RETURN(error);
}
void MYSQL_BIN_LOG::wait_for_last_checkpoint_event()
{
mysql_mutex_lock(&LOCK_xid_list);
for (;;)
{
if (binlog_xid_count_list.is_last(binlog_xid_count_list.head()))
break;
mysql_cond_wait(&COND_xid_list, &LOCK_xid_list);
}
mysql_mutex_unlock(&LOCK_xid_list);
/*
LOCK_xid_list and LOCK_log are chained, so the LOCK_log will only be
obtained after mark_xid_done() has written the last checkpoint event.
*/
mysql_mutex_lock(&LOCK_log);
mysql_mutex_unlock(&LOCK_log);
}
/**
Delete relay log files prior to rli->group_relay_log_name
(i.e. all logs which are not involved in a non-finished group
(transaction)), remove them from the index file and start on next
relay log.
IMPLEMENTATION
- You must hold rli->data_lock before calling this function, since
it writes group_relay_log_pos and similar fields of
Relay_log_info.
- Protects index file with LOCK_index
- Delete relevant relay log files
- Copy all file names after these ones to the front of the index file
- If the OS has truncate, truncate the file, else fill it with \n'
- Read the next file name from the index file and store in rli->linfo
@param rli Relay log information
@param included If false, all relay logs that are strictly before
rli->group_relay_log_name are deleted ; if true, the
latter is deleted too (i.e. all relay logs
read by the SQL slave thread are deleted).
@note
- This is only called from the slave SQL thread when it has read
all commands from a relay log and want to switch to a new relay log.
- When this happens, we can be in an active transaction as
a transaction can span over two relay logs
(although it is always written as a single block to the master's binary
log, hence cannot span over two master's binary logs).
@retval
0 ok
@retval
LOG_INFO_EOF End of log-index-file found
@retval
LOG_INFO_SEEK Could not allocate IO cache
@retval
LOG_INFO_IO Got IO error while reading file
*/
#ifdef HAVE_REPLICATION
int MYSQL_BIN_LOG::purge_first_log(Relay_log_info* rli, bool included)
{
int error, errcode;
char *to_purge_if_included= NULL;
inuse_relaylog *ir;
ulonglong log_space_reclaimed= 0;
DBUG_ENTER("purge_first_log");
DBUG_ASSERT(is_open());
DBUG_ASSERT(rli->slave_running == MYSQL_SLAVE_RUN_NOT_CONNECT);
DBUG_ASSERT(!strcmp(rli->linfo.log_file_name,rli->event_relay_log_name));
mysql_mutex_assert_owner(&rli->data_lock);
mysql_mutex_lock(&LOCK_index);
ir= rli->inuse_relaylog_list;
while (ir)
{
inuse_relaylog *next= ir->next;
if (!ir->completed || ir->dequeued_count < ir->queued_count)
{
included= false;
break;
}
if (!included && !strcmp(ir->name, rli->group_relay_log_name))
break;
if (!next)
{
rli->last_inuse_relaylog= NULL;
included= 1;
to_purge_if_included= my_strdup(ir->name, MYF(0));
}
rli->free_inuse_relaylog(ir);
ir= next;
}
rli->inuse_relaylog_list= ir;
if (ir)
to_purge_if_included= my_strdup(ir->name, MYF(0));
/*
Read the next log file name from the index file and pass it back to
the caller.
*/
if((error=find_log_pos(&rli->linfo, rli->event_relay_log_name, 0)) ||
(error=find_next_log(&rli->linfo, 0)))
{
sql_print_error("next log error: %d offset: %llu log: %s included: %d",
error, rli->linfo.index_file_offset,
rli->event_relay_log_name, included);
goto err;
}
/*
Reset rli's coordinates to the current log.
*/
rli->event_relay_log_pos= BIN_LOG_HEADER_SIZE;
strmake_buf(rli->event_relay_log_name,rli->linfo.log_file_name);
/*
If we removed the rli->group_relay_log_name file,
we must update the rli->group* coordinates, otherwise do not touch it as the
group's execution is not finished (e.g. COMMIT not executed)
*/
if (included)
{
rli->group_relay_log_pos = BIN_LOG_HEADER_SIZE;
strmake_buf(rli->group_relay_log_name,rli->linfo.log_file_name);
rli->notify_group_relay_log_name_update();
}
/* Store where we are in the new file for the execution thread */
if (rli->flush())
error= LOG_INFO_IO;
DBUG_EXECUTE_IF("crash_before_purge_logs", DBUG_SUICIDE(););
rli->relay_log.purge_logs(to_purge_if_included, included,
0, 0, &log_space_reclaimed);
mysql_mutex_lock(&rli->log_space_lock);
rli->log_space_total-= log_space_reclaimed;
mysql_cond_broadcast(&rli->log_space_cond);
mysql_mutex_unlock(&rli->log_space_lock);
/*
* Need to update the log pos because purge logs has been called
* after fetching initially the log pos at the beginning of the method.
*/
if ((errcode= find_log_pos(&rli->linfo, rli->event_relay_log_name, 0)))
{
sql_print_error("next log error: %d offset: %llu log: %s included: %d",
errcode, rli->linfo.index_file_offset,
rli->group_relay_log_name, included);
goto err;
}
/* If included was passed, rli->linfo should be the first entry. */
DBUG_ASSERT(!included || rli->linfo.index_file_start_offset == 0);
err:
my_free(to_purge_if_included);
mysql_mutex_unlock(&LOCK_index);
DBUG_RETURN(error);
}
/**
Update log index_file.
*/
int MYSQL_BIN_LOG::update_log_index(LOG_INFO* log_info, bool need_update_threads)
{
if (copy_up_file_and_fill(&index_file, log_info->index_file_start_offset))
return LOG_INFO_IO;
// now update offsets in index file for running threads
if (need_update_threads)
adjust_linfo_offsets(log_info->index_file_start_offset);
return 0;
}
/**
Remove all logs before the given log from disk and from the index file.
@param to_log Delete all log file name before this file.
@param included If true, to_log is deleted too.
@param need_mutex
@param need_update_threads If we want to update the log coordinates of
all threads. False for relay logs, true otherwise.
@param reclaimeed_log_space If not null, increment this variable to
the amount of log space freed
@note
If any of the logs before the deleted one is in use,
only purge logs up to this one.
@retval
0 ok
@retval
LOG_INFO_EOF to_log not found
LOG_INFO_EMFILE too many files opened
LOG_INFO_FATAL if any other than ENOENT error from
mysql_file_stat() or mysql_file_delete()
*/
int MYSQL_BIN_LOG::purge_logs(const char *to_log,
bool included,
bool need_mutex,
bool need_update_threads,
ulonglong *reclaimed_space)
{
int error= 0;
bool exit_loop= 0;
LOG_INFO log_info;
THD *thd= current_thd;
DBUG_ENTER("purge_logs");
DBUG_PRINT("info",("to_log= %s",to_log));
if (need_mutex)
mysql_mutex_lock(&LOCK_index);
if ((error=find_log_pos(&log_info, to_log, 0 /*no mutex*/)))
{
sql_print_error("MYSQL_BIN_LOG::purge_logs was called with file %s not "
"listed in the index.", to_log);
goto err;
}
if ((error= open_purge_index_file(TRUE)))
{
sql_print_error("MYSQL_BIN_LOG::purge_logs failed to sync the index file.");
goto err;
}
/*
File name exists in index file; delete until we find this file
or a file that is used.
*/
if ((error=find_log_pos(&log_info, NullS, 0 /*no mutex*/)))
goto err;
while ((strcmp(to_log,log_info.log_file_name) || (exit_loop=included)) &&
can_purge_log(log_info.log_file_name))
{
if ((error= register_purge_index_entry(log_info.log_file_name)))
{
sql_print_error("MYSQL_BIN_LOG::purge_logs failed to copy %s to register file.",
log_info.log_file_name);
goto err;
}
if (find_next_log(&log_info, 0) || exit_loop)
break;
}
DBUG_EXECUTE_IF("crash_purge_before_update_index", DBUG_SUICIDE(););
if ((error= sync_purge_index_file()))
{
sql_print_error("MYSQL_BIN_LOG::purge_logs failed to flush register file.");
goto err;
}
/* We know how many files to delete. Update index file. */
if ((error=update_log_index(&log_info, need_update_threads)))
{
sql_print_error("MYSQL_BIN_LOG::purge_logs failed to update the index file");
goto err;
}
DBUG_EXECUTE_IF("crash_purge_critical_after_update_index", DBUG_SUICIDE(););
err:
/* Read each entry from purge_index_file and delete the file. */
if (is_inited_purge_index_file() &&
(error= purge_index_entry(thd, reclaimed_space, FALSE)))
sql_print_error("MYSQL_BIN_LOG::purge_logs failed to process registered files"
" that would be purged.");
close_purge_index_file();
DBUG_EXECUTE_IF("crash_purge_non_critical_after_update_index", DBUG_SUICIDE(););
if (need_mutex)
mysql_mutex_unlock(&LOCK_index);
DBUG_RETURN(error);
}
int MYSQL_BIN_LOG::set_purge_index_file_name(const char *base_file_name)
{
int error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::set_purge_index_file_name");
if (fn_format(purge_index_file_name, base_file_name, mysql_data_home,
".~rec~", MYF(MY_UNPACK_FILENAME | MY_SAFE_PATH |
MY_REPLACE_EXT)) == NULL)
{
error= 1;
sql_print_error("MYSQL_BIN_LOG::set_purge_index_file_name failed to set "
"file name.");
}
DBUG_RETURN(error);
}
int MYSQL_BIN_LOG::open_purge_index_file(bool destroy)
{
int error= 0;
File file= -1;
DBUG_ENTER("MYSQL_BIN_LOG::open_purge_index_file");
if (destroy)
close_purge_index_file();
if (!my_b_inited(&purge_index_file))
{
if ((file= my_open(purge_index_file_name, O_RDWR | O_CREAT | O_BINARY,
MYF(MY_WME | ME_WAITTANG))) < 0 ||
init_io_cache(&purge_index_file, file, IO_SIZE,
(destroy ? WRITE_CACHE : READ_CACHE),
0, 0, MYF(MY_WME | MY_NABP | MY_WAIT_IF_FULL)))
{
error= 1;
sql_print_error("MYSQL_BIN_LOG::open_purge_index_file failed to open register "
" file.");
}
}
DBUG_RETURN(error);
}
int MYSQL_BIN_LOG::close_purge_index_file()
{
int error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::close_purge_index_file");
if (my_b_inited(&purge_index_file))
{
end_io_cache(&purge_index_file);
error= my_close(purge_index_file.file, MYF(0));
}
my_delete(purge_index_file_name, MYF(0));
bzero((char*) &purge_index_file, sizeof(purge_index_file));
DBUG_RETURN(error);
}
bool MYSQL_BIN_LOG::is_inited_purge_index_file()
{
return my_b_inited(&purge_index_file);
}
int MYSQL_BIN_LOG::sync_purge_index_file()
{
int error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::sync_purge_index_file");
if ((error= flush_io_cache(&purge_index_file)) ||
(error= my_sync(purge_index_file.file, MYF(MY_WME|MY_SYNC_FILESIZE))))
DBUG_RETURN(error);
DBUG_RETURN(error);
}
int MYSQL_BIN_LOG::register_purge_index_entry(const char *entry)
{
int error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::register_purge_index_entry");
if ((error=my_b_write(&purge_index_file, (const uchar*)entry, strlen(entry))) ||
(error=my_b_write(&purge_index_file, (const uchar*)"\n", 1)))
DBUG_RETURN (error);
DBUG_RETURN(error);
}
int MYSQL_BIN_LOG::register_create_index_entry(const char *entry)
{
DBUG_ENTER("MYSQL_BIN_LOG::register_create_index_entry");
DBUG_RETURN(register_purge_index_entry(entry));
}
int MYSQL_BIN_LOG::purge_index_entry(THD *thd, ulonglong *reclaimed_space,
bool need_mutex)
{
DBUG_ENTER("MYSQL_BIN_LOG:purge_index_entry");
MY_STAT s;
int error= 0;
LOG_INFO log_info;
LOG_INFO check_log_info;
DBUG_ASSERT(my_b_inited(&purge_index_file));
if ((error=reinit_io_cache(&purge_index_file, READ_CACHE, 0, 0, 0)))
{
sql_print_error("MYSQL_BIN_LOG::purge_index_entry failed to reinit register file "
"for read");
goto err;
}
for (;;)
{
uint length;
if ((length=my_b_gets(&purge_index_file, log_info.log_file_name,
FN_REFLEN)) <= 1)
{
if (purge_index_file.error)
{
error= purge_index_file.error;
sql_print_error("MYSQL_BIN_LOG::purge_index_entry error %d reading from "
"register file.", error);
goto err;
}
/* Reached EOF */
break;
}
/* Get rid of the trailing '\n' */
log_info.log_file_name[length-1]= 0;
if (!mysql_file_stat(m_key_file_log, log_info.log_file_name, &s, MYF(0)))
{
if (my_errno == ENOENT)
{
/*
It's not fatal if we can't stat a log file that does not exist;
If we could not stat, we won't delete.
*/
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_LOG_PURGE_NO_FILE, ER_THD(thd, ER_LOG_PURGE_NO_FILE),
log_info.log_file_name);
}
sql_print_information("Failed to execute mysql_file_stat on file '%s'",
log_info.log_file_name);
my_errno= 0;
}
else
{
/*
Other than ENOENT are fatal
*/
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with getting info on being purged %s; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
log_info.log_file_name);
}
else
{
sql_print_information("Failed to delete log file '%s'; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
log_info.log_file_name);
}
error= LOG_INFO_FATAL;
goto err;
}
}
else
{
if ((error= find_log_pos(&check_log_info, log_info.log_file_name, need_mutex)))
{
if (error != LOG_INFO_EOF)
{
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with deleting %s and "
"reading the binlog index file",
log_info.log_file_name);
}
else
{
sql_print_information("Failed to delete file '%s' and "
"read the binlog index file",
log_info.log_file_name);
}
goto err;
}
error= 0;
DBUG_PRINT("info",("purging %s",log_info.log_file_name));
if (!my_delete(log_info.log_file_name, MYF(0)))
{
if (reclaimed_space)
*reclaimed_space+= s.st_size;
}
else
{
if (my_errno == ENOENT)
{
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_LOG_PURGE_NO_FILE, ER_THD(thd, ER_LOG_PURGE_NO_FILE),
log_info.log_file_name);
}
sql_print_information("Failed to delete file '%s'",
log_info.log_file_name);
my_errno= 0;
}
else
{
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with deleting %s; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
log_info.log_file_name);
}
else
{
sql_print_information("Failed to delete file '%s'; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
log_info.log_file_name);
}
if (my_errno == EMFILE)
{
DBUG_PRINT("info",
("my_errno: %d, set ret = LOG_INFO_EMFILE", my_errno));
error= LOG_INFO_EMFILE;
goto err;
}
error= LOG_INFO_FATAL;
goto err;
}
}
}
}
}
err:
DBUG_RETURN(error);
}
/**
Remove all logs before the given file date from disk and from the
index file.
@param thd Thread pointer
@param purge_time Delete all log files before given date.
@note
If any of the logs before the deleted one is in use,
only purge logs up to this one.
@retval
0 ok
@retval
LOG_INFO_PURGE_NO_ROTATE Binary file that can't be rotated
LOG_INFO_FATAL if any other than ENOENT error from
mysql_file_stat() or mysql_file_delete()
*/
int MYSQL_BIN_LOG::purge_logs_before_date(time_t purge_time)
{
int error;
char to_log[FN_REFLEN];
LOG_INFO log_info;
MY_STAT stat_area;
THD *thd= current_thd;
DBUG_ENTER("purge_logs_before_date");
mysql_mutex_lock(&LOCK_index);
to_log[0]= 0;
if ((error=find_log_pos(&log_info, NullS, 0 /*no mutex*/)))
goto err;
while (strcmp(log_file_name, log_info.log_file_name) &&
can_purge_log(log_info.log_file_name))
{
if (!mysql_file_stat(m_key_file_log,
log_info.log_file_name, &stat_area, MYF(0)))
{
if (my_errno == ENOENT)
{
/*
It's not fatal if we can't stat a log file that does not exist.
*/
my_errno= 0;
}
else
{
/*
Other than ENOENT are fatal
*/
if (thd)
{
push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
ER_BINLOG_PURGE_FATAL_ERR,
"a problem with getting info on being purged %s; "
"consider examining correspondence "
"of your binlog index file "
"to the actual binlog files",
log_info.log_file_name);
}
else
{
sql_print_information("Failed to delete log file '%s'",
log_info.log_file_name);
}
error= LOG_INFO_FATAL;
goto err;
}
}
else
{
if (stat_area.st_mtime < purge_time)
strmake_buf(to_log, log_info.log_file_name);
else
break;
}
if (find_next_log(&log_info, 0))
break;
}
error= (to_log[0] ? purge_logs(to_log, 1, 0, 1, (ulonglong *) 0) : 0);
err:
mysql_mutex_unlock(&LOCK_index);
DBUG_RETURN(error);
}
bool
MYSQL_BIN_LOG::can_purge_log(const char *log_file_name_arg)
{
xid_count_per_binlog *b;
if (is_active(log_file_name_arg))
return false;
mysql_mutex_lock(&LOCK_xid_list);
{
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
while ((b= it++) &&
0 != strncmp(log_file_name_arg+dirname_length(log_file_name_arg),
b->binlog_name, b->binlog_name_len))
;
}
mysql_mutex_unlock(&LOCK_xid_list);
if (b)
return false;
return !log_in_use(log_file_name_arg);
}
#endif /* HAVE_REPLICATION */
bool
MYSQL_BIN_LOG::is_xidlist_idle()
{
bool res;
mysql_mutex_lock(&LOCK_xid_list);
res= is_xidlist_idle_nolock();
mysql_mutex_unlock(&LOCK_xid_list);
return res;
}
bool
MYSQL_BIN_LOG::is_xidlist_idle_nolock()
{
xid_count_per_binlog *b;
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
while ((b= it++))
{
if (b->xid_count > 0)
return false;
}
return true;
}
/**
Create a new log file name.
@param buf buf of at least FN_REFLEN where new name is stored
@note
If file name will be longer then FN_REFLEN it will be truncated
*/
void MYSQL_BIN_LOG::make_log_name(char* buf, const char* log_ident)
{
uint dir_len = dirname_length(log_file_name);
if (dir_len >= FN_REFLEN)
dir_len=FN_REFLEN-1;
strnmov(buf, log_file_name, dir_len);
strmake(buf+dir_len, log_ident, FN_REFLEN - dir_len -1);
}
/**
Check if we are writing/reading to the given log file.
*/
bool MYSQL_BIN_LOG::is_active(const char *log_file_name_arg)
{
/**
* there should/must be mysql_mutex_assert_owner(&LOCK_log) here...
* but code violates this! (scary monsters and super creeps!)
*
* example stacktrace:
* #8 MYSQL_BIN_LOG::is_active
* #9 MYSQL_BIN_LOG::can_purge_log
* #10 MYSQL_BIN_LOG::purge_logs
* #11 MYSQL_BIN_LOG::purge_first_log
* #12 next_event
* #13 exec_relay_log_event
*
* I didn't investigate if this is ligit...(i.e if my comment is wrong)
*/
return !strcmp(log_file_name, log_file_name_arg);
}
/*
Wrappers around new_file_impl to avoid using argument
to control locking. The argument 1) less readable 2) breaks
incapsulation 3) allows external access to the class without
a lock (which is not possible with private new_file_without_locking
method).
@retval
nonzero - error
*/
int MYSQL_BIN_LOG::new_file()
{
return new_file_impl(1);
}
/*
@retval
nonzero - error
*/
int MYSQL_BIN_LOG::new_file_without_locking()
{
return new_file_impl(0);
}
/**
Start writing to a new log file or reopen the old file.
@param need_lock Set to 1 if caller has not locked LOCK_log
@retval
nonzero - error
@note
The new file name is stored last in the index file
*/
int MYSQL_BIN_LOG::new_file_impl(bool need_lock)
{
int error= 0, close_on_error= FALSE;
char new_name[FN_REFLEN], *new_name_ptr, *old_name, *file_to_open;
uint close_flag;
bool delay_close= false;
File UNINIT_VAR(old_file);
DBUG_ENTER("MYSQL_BIN_LOG::new_file_impl");
if (need_lock)
mysql_mutex_lock(&LOCK_log);
mysql_mutex_assert_owner(&LOCK_log);
if (!is_open())
{
DBUG_PRINT("info",("log is closed"));
mysql_mutex_unlock(&LOCK_log);
DBUG_RETURN(error);
}
mysql_mutex_lock(&LOCK_index);
/* Reuse old name if not binlog and not update log */
new_name_ptr= name;
/*
If user hasn't specified an extension, generate a new log name
We have to do this here and not in open as we want to store the
new file name in the current binary log file.
*/
if ((error= generate_new_name(new_name, name, 0)))
goto end;
new_name_ptr=new_name;
if (log_type == LOG_BIN)
{
{
/*
We log the whole file name for log file as the user may decide
to change base names at some point.
*/
Rotate_log_event r(new_name+dirname_length(new_name), 0, LOG_EVENT_OFFSET,
is_relay_log ? Rotate_log_event::RELAY_LOG : 0);
/*
The current relay-log's closing Rotate event must have checksum
value computed with an algorithm of the last relay-logged FD event.
*/
if (is_relay_log)
r.checksum_alg= relay_log_checksum_alg;
DBUG_ASSERT(!is_relay_log || relay_log_checksum_alg != BINLOG_CHECKSUM_ALG_UNDEF);
if(DBUG_EVALUATE_IF("fault_injection_new_file_rotate_event", (error=close_on_error=TRUE), FALSE) ||
(error= write_event(&r)))
{
DBUG_EXECUTE_IF("fault_injection_new_file_rotate_event", errno=2;);
close_on_error= TRUE;
my_printf_error(ER_ERROR_ON_WRITE,
ER_THD_OR_DEFAULT(current_thd, ER_CANT_OPEN_FILE),
MYF(ME_FATALERROR), name, errno);
goto end;
}
bytes_written += r.data_written;
}
/*
Update needs to be signalled even if there is no rotate event
log rotation should give the waiting thread a signal to
discover EOF and move on to the next log.
*/
signal_update();
}
old_name=name;
name=0; // Don't free name
close_flag= LOG_CLOSE_TO_BE_OPENED | LOG_CLOSE_INDEX;
if (!is_relay_log)
{
/*
We need to keep the old binlog file open (and marked as in-use) until
the new one is fully created and synced to disk and index. Otherwise we
leave a window where if we crash, there is no binlog file marked as
crashed for server restart to detect the need for recovery.
*/
old_file= log_file.file;
close_flag|= LOG_CLOSE_DELAYED_CLOSE;
delay_close= true;
}
close(close_flag);
if (log_type == LOG_BIN && checksum_alg_reset != BINLOG_CHECKSUM_ALG_UNDEF)
{
DBUG_ASSERT(!is_relay_log);
DBUG_ASSERT(binlog_checksum_options != checksum_alg_reset);
binlog_checksum_options= checksum_alg_reset;
}
/*
Note that at this point, log_state != LOG_CLOSED
(important for is_open()).
*/
/*
new_file() is only used for rotation (in FLUSH LOGS or because size >
max_binlog_size or max_relay_log_size).
If this is a binary log, the Format_description_log_event at the
beginning of the new file should have created=0 (to distinguish with the
Format_description_log_event written at server startup, which should
trigger temp tables deletion on slaves.
*/
/* reopen index binlog file, BUG#34582 */
file_to_open= index_file_name;
error= open_index_file(index_file_name, 0, FALSE);
if (!error)
{
/* reopen the binary log file. */
file_to_open= new_name_ptr;
error= open(old_name, log_type, new_name_ptr, 0, io_cache_type,
max_size, 1, FALSE);
}
/* handle reopening errors */
if (error)
{
my_error(ER_CANT_OPEN_FILE, MYF(ME_FATALERROR), file_to_open, error);
close_on_error= TRUE;
}
my_free(old_name);
end:
if (delay_close)
{
clear_inuse_flag_when_closing(old_file);
mysql_file_close(old_file, MYF(MY_WME));
}
if (error && close_on_error /* rotate or reopen failed */)
{
/*
Close whatever was left opened.
We are keeping the behavior as it exists today, ie,
we disable logging and move on (see: BUG#51014).
TODO: as part of WL#1790 consider other approaches:
- kill mysql (safety);
- try multiple locations for opening a log file;
- switch server to protected/readonly mode
- ...
*/
close(LOG_CLOSE_INDEX);
sql_print_error("Could not open %s for logging (error %d). "
"Turning logging off for the whole duration "
"of the MySQL server process. To turn it on "
"again: fix the cause, shutdown the MySQL "
"server and restart it.",
new_name_ptr, errno);
}
mysql_mutex_unlock(&LOCK_index);
if (need_lock)
mysql_mutex_unlock(&LOCK_log);
DBUG_RETURN(error);
}
bool MYSQL_BIN_LOG::write_event(Log_event *ev, IO_CACHE *file)
{
Log_event_writer writer(file, &crypto);
if (crypto.scheme && file == &log_file)
writer.ctx= alloca(crypto.ctx_size);
return writer.write(ev);
}
bool MYSQL_BIN_LOG::append(Log_event *ev)
{
bool res;
mysql_mutex_lock(&LOCK_log);
res= append_no_lock(ev);
mysql_mutex_unlock(&LOCK_log);
return res;
}
bool MYSQL_BIN_LOG::append_no_lock(Log_event* ev)
{
bool error = 0;
DBUG_ENTER("MYSQL_BIN_LOG::append");
mysql_mutex_assert_owner(&LOCK_log);
DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
if (write_event(ev))
{
error=1;
goto err;
}
bytes_written+= ev->data_written;
DBUG_PRINT("info",("max_size: %lu",max_size));
if (flush_and_sync(0))
goto err;
if (my_b_append_tell(&log_file) > max_size)
error= new_file_without_locking();
err:
signal_update(); // Safe as we don't call close
DBUG_RETURN(error);
}
bool MYSQL_BIN_LOG::write_event_buffer(uchar* buf, uint len)
{
bool error= 1;
uchar *ebuf= 0;
DBUG_ENTER("MYSQL_BIN_LOG::write_event_buffer");
DBUG_ASSERT(log_file.type == SEQ_READ_APPEND);
mysql_mutex_assert_owner(&LOCK_log);
if (crypto.scheme != 0)
{
DBUG_ASSERT(crypto.scheme == 1);
uint elen;
uchar iv[BINLOG_IV_LENGTH];
ebuf= (uchar*)my_safe_alloca(len);
if (!ebuf)
goto err;
crypto.set_iv(iv, my_b_append_tell(&log_file));
/*
we want to encrypt everything, excluding the event length:
massage the data before the encryption
*/
memcpy(buf + EVENT_LEN_OFFSET, buf, 4);
if (encryption_crypt(buf + 4, len - 4,
ebuf + 4, &elen,
crypto.key, crypto.key_length, iv, sizeof(iv),
ENCRYPTION_FLAG_ENCRYPT | ENCRYPTION_FLAG_NOPAD,
ENCRYPTION_KEY_SYSTEM_DATA, crypto.key_version))
goto err;
DBUG_ASSERT(elen == len - 4);
/* massage the data after the encryption */
memcpy(ebuf, ebuf + EVENT_LEN_OFFSET, 4);
int4store(ebuf + EVENT_LEN_OFFSET, len);
buf= ebuf;
}
if (my_b_append(&log_file, buf, len))
goto err;
bytes_written+= len;
error= 0;
DBUG_PRINT("info",("max_size: %lu",max_size));
if (flush_and_sync(0))
goto err;
if (my_b_append_tell(&log_file) > max_size)
error= new_file_without_locking();
err:
my_safe_afree(ebuf, len);
if (!error)
signal_update();
DBUG_RETURN(error);
}
bool MYSQL_BIN_LOG::flush_and_sync(bool *synced)
{
int err=0, fd=log_file.file;
if (synced)
*synced= 0;
mysql_mutex_assert_owner(&LOCK_log);
if (flush_io_cache(&log_file))
return 1;
uint sync_period= get_sync_period();
if (sync_period && ++sync_counter >= sync_period)
{
sync_counter= 0;
err= mysql_file_sync(fd, MYF(MY_WME|MY_SYNC_FILESIZE));
if (synced)
*synced= 1;
#ifndef DBUG_OFF
if (opt_binlog_dbug_fsync_sleep > 0)
my_sleep(opt_binlog_dbug_fsync_sleep);
#endif
}
return err;
}
void MYSQL_BIN_LOG::start_union_events(THD *thd, query_id_t query_id_param)
{
DBUG_ASSERT(!thd->binlog_evt_union.do_union);
thd->binlog_evt_union.do_union= TRUE;
thd->binlog_evt_union.unioned_events= FALSE;
thd->binlog_evt_union.unioned_events_trans= FALSE;
thd->binlog_evt_union.first_query_id= query_id_param;
}
void MYSQL_BIN_LOG::stop_union_events(THD *thd)
{
DBUG_ASSERT(thd->binlog_evt_union.do_union);
thd->binlog_evt_union.do_union= FALSE;
}
bool MYSQL_BIN_LOG::is_query_in_union(THD *thd, query_id_t query_id_param)
{
return (thd->binlog_evt_union.do_union &&
query_id_param >= thd->binlog_evt_union.first_query_id);
}
/**
This function checks if a transactional table was updated by the
current transaction.
@param thd The client thread that executed the current statement.
@return
@c true if a transactional table was updated, @c false otherwise.
*/
bool
trans_has_updated_trans_table(const THD* thd)
{
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
return (cache_mngr ? !cache_mngr->trx_cache.empty() : 0);
}
/**
This function checks if a transactional table was updated by the
current statement.
@param thd The client thread that executed the current statement.
@return
@c true if a transactional table was updated, @c false otherwise.
*/
bool
stmt_has_updated_trans_table(const THD *thd)
{
Ha_trx_info *ha_info;
for (ha_info= thd->transaction.stmt.ha_list; ha_info;
ha_info= ha_info->next())
{
if (ha_info->is_trx_read_write() && ha_info->ht() != binlog_hton)
return (TRUE);
}
return (FALSE);
}
/**
This function checks if either a trx-cache or a non-trx-cache should
be used. If @c bin_log_direct_non_trans_update is active or the format
is either MIXED or ROW, the cache to be used depends on the flag @c
is_transactional.
On the other hand, if binlog_format is STMT or direct option is
OFF, the trx-cache should be used if and only if the statement is
transactional or the trx-cache is not empty. Otherwise, the
non-trx-cache should be used.
@param thd The client thread.
@param is_transactional The changes are related to a trx-table.
@return
@c true if a trx-cache should be used, @c false otherwise.
*/
bool use_trans_cache(const THD* thd, bool is_transactional)
{
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
return
((thd->is_current_stmt_binlog_format_row() ||
thd->variables.binlog_direct_non_trans_update) ? is_transactional :
(is_transactional || !cache_mngr->trx_cache.empty()));
}
/**
This function checks if a transaction, either a multi-statement
or a single statement transaction is about to commit or not.
@param thd The client thread that executed the current statement.
@param all Committing a transaction (i.e. TRUE) or a statement
(i.e. FALSE).
@return
@c true if committing a transaction, otherwise @c false.
*/
bool ending_trans(THD* thd, const bool all)
{
return (all || ending_single_stmt_trans(thd, all));
}
/**
This function checks if a single statement transaction is about
to commit or not.
@param thd The client thread that executed the current statement.
@param all Committing a transaction (i.e. TRUE) or a statement
(i.e. FALSE).
@return
@c true if committing a single statement transaction, otherwise
@c false.
*/
bool ending_single_stmt_trans(THD* thd, const bool all)
{
return (!all && !thd->in_multi_stmt_transaction_mode());
}
/**
This function checks if a non-transactional table was updated by
the current transaction.
@param thd The client thread that executed the current statement.
@return
@c true if a non-transactional table was updated, @c false
otherwise.
*/
bool trans_has_updated_non_trans_table(const THD* thd)
{
return (thd->transaction.all.modified_non_trans_table ||
thd->transaction.stmt.modified_non_trans_table);
}
/**
This function checks if a non-transactional table was updated by the
current statement.
@param thd The client thread that executed the current statement.
@return
@c true if a non-transactional table was updated, @c false otherwise.
*/
bool stmt_has_updated_non_trans_table(const THD* thd)
{
return (thd->transaction.stmt.modified_non_trans_table);
}
/*
These functions are placed in this file since they need access to
binlog_hton, which has internal linkage.
*/
binlog_cache_mngr *THD::binlog_setup_trx_data()
{
DBUG_ENTER("THD::binlog_setup_trx_data");
binlog_cache_mngr *cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
if (cache_mngr)
DBUG_RETURN(cache_mngr); // Already set up
cache_mngr= (binlog_cache_mngr*) my_malloc(sizeof(binlog_cache_mngr), MYF(MY_ZEROFILL));
if (!cache_mngr ||
open_cached_file(&cache_mngr->stmt_cache.cache_log, mysql_tmpdir,
LOG_PREFIX, binlog_stmt_cache_size, MYF(MY_WME)) ||
open_cached_file(&cache_mngr->trx_cache.cache_log, mysql_tmpdir,
LOG_PREFIX, binlog_cache_size, MYF(MY_WME)))
{
my_free(cache_mngr);
DBUG_RETURN(0); // Didn't manage to set it up
}
thd_set_ha_data(this, binlog_hton, cache_mngr);
cache_mngr= new (cache_mngr)
binlog_cache_mngr(max_binlog_stmt_cache_size,
max_binlog_cache_size,
&binlog_stmt_cache_use,
&binlog_stmt_cache_disk_use,
&binlog_cache_use,
&binlog_cache_disk_use);
DBUG_RETURN(cache_mngr);
}
/*
Function to start a statement and optionally a transaction for the
binary log.
SYNOPSIS
binlog_start_trans_and_stmt()
DESCRIPTION
This function does three things:
- Start a transaction if not in autocommit mode or if a BEGIN
statement has been seen.
- Start a statement transaction to allow us to truncate the cache.
- Save the currrent binlog position so that we can roll back the
statement by truncating the cache.
We only update the saved position if the old one was undefined,
the reason is that there are some cases (e.g., for CREATE-SELECT)
where the position is saved twice (e.g., both in
select_create::prepare() and THD::binlog_write_table_map()) , but
we should use the first. This means that calls to this function
can be used to start the statement before the first table map
event, to include some extra events.
*/
void
THD::binlog_start_trans_and_stmt()
{
binlog_cache_mngr *cache_mngr= (binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
DBUG_ENTER("binlog_start_trans_and_stmt");
DBUG_PRINT("enter", ("cache_mngr: %p cache_mngr->trx_cache.get_prev_position(): %lu",
cache_mngr,
(cache_mngr ? (ulong) cache_mngr->trx_cache.get_prev_position() :
(ulong) 0)));
if (cache_mngr == NULL ||
cache_mngr->trx_cache.get_prev_position() == MY_OFF_T_UNDEF)
{
this->binlog_set_stmt_begin();
if (in_multi_stmt_transaction_mode())
trans_register_ha(this, TRUE, binlog_hton);
trans_register_ha(this, FALSE, binlog_hton);
/*
Mark statement transaction as read/write. We never start
a binary log transaction and keep it read-only,
therefore it's best to mark the transaction read/write just
at the same time we start it.
Not necessary to mark the normal transaction read/write
since the statement-level flag will be propagated automatically
inside ha_commit_trans.
*/
ha_data[binlog_hton->slot].ha_info[0].set_trx_read_write();
}
DBUG_VOID_RETURN;
}
void THD::binlog_set_stmt_begin() {
binlog_cache_mngr *cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
/*
The call to binlog_trans_log_savepos() might create the cache_mngr
structure, if it didn't exist before, so we save the position
into an auto variable and then write it into the transaction
data for the binary log (i.e., cache_mngr).
*/
my_off_t pos= 0;
binlog_trans_log_savepos(this, &pos);
cache_mngr= (binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
cache_mngr->trx_cache.set_prev_position(pos);
}
static int
binlog_start_consistent_snapshot(handlerton *hton, THD *thd)
{
int err= 0;
DBUG_ENTER("binlog_start_consistent_snapshot");
binlog_cache_mngr *const cache_mngr= thd->binlog_setup_trx_data();
/* Server layer calls us with LOCK_commit_ordered locked, so this is safe. */
mysql_mutex_assert_owner(&LOCK_commit_ordered);
strmake_buf(cache_mngr->last_commit_pos_file, mysql_bin_log.last_commit_pos_file);
cache_mngr->last_commit_pos_offset= mysql_bin_log.last_commit_pos_offset;
trans_register_ha(thd, TRUE, hton);
DBUG_RETURN(err);
}
/**
This function writes a table map to the binary log.
Note that in order to keep the signature uniform with related methods,
we use a redundant parameter to indicate whether a transactional table
was changed or not.
If with_annotate != NULL and
*with_annotate = TRUE write also Annotate_rows before the table map.
@param table a pointer to the table.
@param is_transactional @c true indicates a transactional table,
otherwise @c false a non-transactional.
@return
nonzero if an error pops up when writing the table map event.
*/
int THD::binlog_write_table_map(TABLE *table, bool is_transactional,
my_bool *with_annotate)
{
int error;
DBUG_ENTER("THD::binlog_write_table_map");
DBUG_PRINT("enter", ("table: 0x%lx (%s: #%lu)",
(long) table, table->s->table_name.str,
table->s->table_map_id));
/* Ensure that all events in a GTID group are in the same cache */
if (variables.option_bits & OPTION_GTID_BEGIN)
is_transactional= 1;
/* Pre-conditions */
DBUG_ASSERT(is_current_stmt_binlog_format_row());
DBUG_ASSERT(WSREP_EMULATE_BINLOG(this) || mysql_bin_log.is_open());
DBUG_ASSERT(table->s->table_map_id != ULONG_MAX);
Table_map_log_event
the_event(this, table, table->s->table_map_id, is_transactional);
if (binlog_table_maps == 0)
binlog_start_trans_and_stmt();
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
IO_CACHE *file=
cache_mngr->get_binlog_cache_log(use_trans_cache(this, is_transactional));
Log_event_writer writer(file);
binlog_cache_data *cache_data=
cache_mngr->get_binlog_cache_data(use_trans_cache(this, is_transactional));
if (with_annotate && *with_annotate)
{
Annotate_rows_log_event anno(table->in_use, is_transactional, false);
/* Annotate event should be written not more than once */
*with_annotate= 0;
if ((error= writer.write(&anno)))
{
if (my_errno == EFBIG)
cache_data->set_incident();
DBUG_RETURN(error);
}
}
if ((error= writer.write(&the_event)))
DBUG_RETURN(error);
binlog_table_maps++;
DBUG_RETURN(0);
}
/**
This function retrieves a pending row event from a cache which is
specified through the parameter @c is_transactional. Respectively, when it
is @c true, the pending event is returned from the transactional cache.
Otherwise from the non-transactional cache.
@param is_transactional @c true indicates a transactional cache,
otherwise @c false a non-transactional.
@return
The row event if any.
*/
Rows_log_event*
THD::binlog_get_pending_rows_event(bool is_transactional) const
{
Rows_log_event* rows= NULL;
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(this, binlog_hton);
/*
This is less than ideal, but here's the story: If there is no cache_mngr,
prepare_pending_rows_event() has never been called (since the cache_mngr
is set up there). In that case, we just return NULL.
*/
if (cache_mngr)
{
binlog_cache_data *cache_data=
cache_mngr->get_binlog_cache_data(use_trans_cache(this, is_transactional));
rows= cache_data->pending();
}
return (rows);
}
/**
This function stores a pending row event into a cache which is specified
through the parameter @c is_transactional. Respectively, when it is @c
true, the pending event is stored into the transactional cache. Otherwise
into the non-transactional cache.
@param evt a pointer to the row event.
@param is_transactional @c true indicates a transactional cache,
otherwise @c false a non-transactional.
*/
void
THD::binlog_set_pending_rows_event(Rows_log_event* ev, bool is_transactional)
{
binlog_cache_mngr *const cache_mngr= binlog_setup_trx_data();
DBUG_ASSERT(cache_mngr);
binlog_cache_data *cache_data=
cache_mngr->get_binlog_cache_data(use_trans_cache(this, is_transactional));
cache_data->set_pending(ev);
}
/**
This function removes the pending rows event, discarding any outstanding
rows. If there is no pending rows event available, this is effectively a
no-op.
@param thd a pointer to the user thread.
@param is_transactional @c true indicates a transactional cache,
otherwise @c false a non-transactional.
*/
int
MYSQL_BIN_LOG::remove_pending_rows_event(THD *thd, bool is_transactional)
{
DBUG_ENTER("MYSQL_BIN_LOG::remove_pending_rows_event");
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
DBUG_ASSERT(cache_mngr);
binlog_cache_data *cache_data=
cache_mngr->get_binlog_cache_data(use_trans_cache(thd, is_transactional));
if (Rows_log_event* pending= cache_data->pending())
{
delete pending;
cache_data->set_pending(NULL);
}
DBUG_RETURN(0);
}
/*
Moves the last bunch of rows from the pending Rows event to a cache (either
transactional cache if is_transaction is @c true, or the non-transactional
cache otherwise. Sets a new pending event.
@param thd a pointer to the user thread.
@param evt a pointer to the row event.
@param is_transactional @c true indicates a transactional cache,
otherwise @c false a non-transactional.
*/
int
MYSQL_BIN_LOG::flush_and_set_pending_rows_event(THD *thd,
Rows_log_event* event,
bool is_transactional)
{
DBUG_ENTER("MYSQL_BIN_LOG::flush_and_set_pending_rows_event(event)");
DBUG_ASSERT(WSREP_EMULATE_BINLOG(thd) || mysql_bin_log.is_open());
DBUG_PRINT("enter", ("event: 0x%lx", (long) event));
int error= 0;
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
DBUG_ASSERT(cache_mngr);
binlog_cache_data *cache_data=
cache_mngr->get_binlog_cache_data(use_trans_cache(thd, is_transactional));
DBUG_PRINT("info", ("cache_mngr->pending(): 0x%lx", (long) cache_data->pending()));
if (Rows_log_event* pending= cache_data->pending())
{
Log_event_writer writer(&cache_data->cache_log);
/*
Write pending event to the cache.
*/
DBUG_EXECUTE_IF("simulate_disk_full_at_flush_pending",
{DBUG_SET("+d,simulate_file_write_error");});
if (writer.write(pending))
{
set_write_error(thd, is_transactional);
if (check_write_error(thd) && cache_data &&
stmt_has_updated_non_trans_table(thd))
cache_data->set_incident();
delete pending;
cache_data->set_pending(NULL);
DBUG_EXECUTE_IF("simulate_disk_full_at_flush_pending",
{DBUG_SET("-d,simulate_file_write_error");});
DBUG_RETURN(1);
}
delete pending;
}
thd->binlog_set_pending_rows_event(event, is_transactional);
DBUG_RETURN(error);
}
/* Generate a new global transaction ID, and write it to the binlog */
bool
MYSQL_BIN_LOG::write_gtid_event(THD *thd, bool standalone,
bool is_transactional, uint64 commit_id)
{
rpl_gtid gtid;
uint32 domain_id;
uint32 local_server_id;
uint64 seq_no;
int err;
DBUG_ENTER("write_gtid_event");
DBUG_PRINT("enter", ("standalone: %d", standalone));
#ifdef WITH_WSREP
if (WSREP(thd) && thd->wsrep_trx_meta.gtid.seqno != -1 && wsrep_gtid_mode)
{
domain_id= wsrep_gtid_domain_id;
} else {
#endif /* WITH_WSREP */
domain_id= thd->variables.gtid_domain_id;
#ifdef WITH_WSREP
}
#endif /* WITH_WSREP */
local_server_id= thd->variables.server_id;
seq_no= thd->variables.gtid_seq_no;
if (thd->variables.option_bits & OPTION_GTID_BEGIN)
{
DBUG_PRINT("error", ("OPTION_GTID_BEGIN is set. "
"Master and slave will have different GTID values"));
/* Reset the flag, as we will write out a GTID anyway */
thd->variables.option_bits&= ~OPTION_GTID_BEGIN;
}
/*
Reset the session variable gtid_seq_no, to reduce the risk of accidentally
producing a duplicate GTID.
*/
thd->variables.gtid_seq_no= 0;
if (seq_no != 0)
{
/* Use the specified sequence number. */
gtid.domain_id= domain_id;
gtid.server_id= local_server_id;
gtid.seq_no= seq_no;
err= rpl_global_gtid_binlog_state.update(&gtid, opt_gtid_strict_mode);
if (err && thd->get_stmt_da()->sql_errno()==ER_GTID_STRICT_OUT_OF_ORDER)
errno= ER_GTID_STRICT_OUT_OF_ORDER;
}
else
{
/* Allocate the next sequence number for the GTID. */
err= rpl_global_gtid_binlog_state.update_with_next_gtid(domain_id,
local_server_id, &gtid);
seq_no= gtid.seq_no;
}
if (err)
DBUG_RETURN(true);
thd->last_commit_gtid= gtid;
Gtid_log_event gtid_event(thd, seq_no, domain_id, standalone,
LOG_EVENT_SUPPRESS_USE_F, is_transactional,
commit_id);
/* Write the event to the binary log. */
DBUG_ASSERT(this == &mysql_bin_log);
if (write_event(&gtid_event))
DBUG_RETURN(true);
status_var_add(thd->status_var.binlog_bytes_written, gtid_event.data_written);
DBUG_RETURN(false);
}
int
MYSQL_BIN_LOG::write_state_to_file()
{
File file_no;
IO_CACHE cache;
char buf[FN_REFLEN];
int err;
bool opened= false;
bool log_inited= false;
fn_format(buf, opt_bin_logname, mysql_data_home, ".state",
MY_UNPACK_FILENAME);
if ((file_no= mysql_file_open(key_file_binlog_state, buf,
O_RDWR|O_CREAT|O_TRUNC|O_BINARY,
MYF(MY_WME))) < 0)
{
err= 1;
goto err;
}
opened= true;
if ((err= init_io_cache(&cache, file_no, IO_SIZE, WRITE_CACHE, 0, 0,
MYF(MY_WME|MY_WAIT_IF_FULL))))
goto err;
log_inited= true;
if ((err= rpl_global_gtid_binlog_state.write_to_iocache(&cache)))
goto err;
log_inited= false;
if ((err= end_io_cache(&cache)))
goto err;
if ((err= mysql_file_sync(file_no, MYF(MY_WME|MY_SYNC_FILESIZE))))
goto err;
goto end;
err:
sql_print_error("Error writing binlog state to file '%s'.\n", buf);
if (log_inited)
end_io_cache(&cache);
end:
if (opened)
mysql_file_close(file_no, MYF(0));
return err;
}
/*
Initialize the binlog state from the master-bin.state file, at server startup.
Returns:
0 for success.
2 for when .state file did not exist.
1 for other error.
*/
int
MYSQL_BIN_LOG::read_state_from_file()
{
File file_no;
IO_CACHE cache;
char buf[FN_REFLEN];
int err;
bool opened= false;
bool log_inited= false;
fn_format(buf, opt_bin_logname, mysql_data_home, ".state",
MY_UNPACK_FILENAME);
if ((file_no= mysql_file_open(key_file_binlog_state, buf,
O_RDONLY|O_BINARY, MYF(0))) < 0)
{
if (my_errno != ENOENT)
{
err= 1;
goto err;
}
else
{
/*
If the state file does not exist, this is the first server startup
with GTID enabled. So initialize to empty state.
*/
rpl_global_gtid_binlog_state.reset();
err= 2;
goto end;
}
}
opened= true;
if ((err= init_io_cache(&cache, file_no, IO_SIZE, READ_CACHE, 0, 0,
MYF(MY_WME|MY_WAIT_IF_FULL))))
goto err;
log_inited= true;
if ((err= rpl_global_gtid_binlog_state.read_from_iocache(&cache)))
goto err;
goto end;
err:
sql_print_error("Error reading binlog GTID state from file '%s'.\n", buf);
end:
if (log_inited)
end_io_cache(&cache);
if (opened)
mysql_file_close(file_no, MYF(0));
return err;
}
int
MYSQL_BIN_LOG::get_most_recent_gtid_list(rpl_gtid **list, uint32 *size)
{
return rpl_global_gtid_binlog_state.get_most_recent_gtid_list(list, size);
}
bool
MYSQL_BIN_LOG::append_state_pos(String *str)
{
return rpl_global_gtid_binlog_state.append_pos(str);
}
bool
MYSQL_BIN_LOG::append_state(String *str)
{
return rpl_global_gtid_binlog_state.append_state(str);
}
bool
MYSQL_BIN_LOG::is_empty_state()
{
return (rpl_global_gtid_binlog_state.count() == 0);
}
bool
MYSQL_BIN_LOG::find_in_binlog_state(uint32 domain_id, uint32 server_id_arg,
rpl_gtid *out_gtid)
{
rpl_gtid *gtid;
if ((gtid= rpl_global_gtid_binlog_state.find(domain_id, server_id_arg)))
*out_gtid= *gtid;
return gtid != NULL;
}
bool
MYSQL_BIN_LOG::lookup_domain_in_binlog_state(uint32 domain_id,
rpl_gtid *out_gtid)
{
rpl_gtid *found_gtid;
if ((found_gtid= rpl_global_gtid_binlog_state.find_most_recent(domain_id)))
{
*out_gtid= *found_gtid;
return true;
}
return false;
}
int
MYSQL_BIN_LOG::bump_seq_no_counter_if_needed(uint32 domain_id, uint64 seq_no)
{
return rpl_global_gtid_binlog_state.bump_seq_no_if_needed(domain_id, seq_no);
}
bool
MYSQL_BIN_LOG::check_strict_gtid_sequence(uint32 domain_id,
uint32 server_id_arg,
uint64 seq_no)
{
return rpl_global_gtid_binlog_state.check_strict_sequence(domain_id,
server_id_arg,
seq_no);
}
/**
Write an event to the binary log. If with_annotate != NULL and
*with_annotate = TRUE write also Annotate_rows before the event
(this should happen only if the event is a Table_map).
*/
bool MYSQL_BIN_LOG::write(Log_event *event_info, my_bool *with_annotate)
{
THD *thd= event_info->thd;
bool error= 1;
binlog_cache_data *cache_data= 0;
bool is_trans_cache= FALSE;
bool using_trans= event_info->use_trans_cache();
bool direct= event_info->use_direct_logging();
ulong UNINIT_VAR(prev_binlog_id);
DBUG_ENTER("MYSQL_BIN_LOG::write(Log_event *)");
/*
When binary logging is not enabled (--log-bin=0), wsrep-patch partially
enables it without opening the binlog file (MYSQL_BIN_LOG::open().
So, avoid writing to binlog file.
*/
if (direct &&
(wsrep_emulate_bin_log ||
(WSREP(thd) && !(thd->variables.option_bits & OPTION_BIN_LOG))))
DBUG_RETURN(0);
if (thd->variables.option_bits & OPTION_GTID_BEGIN)
{
DBUG_PRINT("info", ("OPTION_GTID_BEGIN was set"));
/* Wait for commit from binary log before we commit */
direct= 0;
using_trans= 1;
}
if (thd->binlog_evt_union.do_union)
{
/*
In Stored function; Remember that function call caused an update.
We will log the function call to the binary log on function exit
*/
thd->binlog_evt_union.unioned_events= TRUE;
thd->binlog_evt_union.unioned_events_trans |= using_trans;
DBUG_RETURN(0);
}
/*
We only end the statement if we are in a top-level statement. If
we are inside a stored function, we do not end the statement since
this will close all tables on the slave. But there can be a special case
where we are inside a stored function/trigger and a SAVEPOINT is being
set in side the stored function/trigger. This SAVEPOINT execution will
force the pending event to be flushed without an STMT_END_F flag. This
will result in a case where following DMLs will be considered as part of
same statement and result in data loss on slave. Hence in this case we
force the end_stmt to be true.
*/
bool const end_stmt= (thd->in_sub_stmt && thd->lex->sql_command ==
SQLCOM_SAVEPOINT) ? true :
(thd->locked_tables_mode && thd->lex->requires_prelocking());
if (thd->binlog_flush_pending_rows_event(end_stmt, using_trans))
DBUG_RETURN(error);
/*
In most cases this is only called if 'is_open()' is true; in fact this is
mostly called if is_open() *was* true a few instructions before, but it
could have changed since.
*/
/* applier and replayer can skip writing binlog events */
if ((WSREP_EMULATE_BINLOG(thd) &&
IF_WSREP(thd->wsrep_exec_mode != REPL_RECV, 0)) || is_open())
{
my_off_t UNINIT_VAR(my_org_b_tell);
#ifdef HAVE_REPLICATION
/*
In the future we need to add to the following if tests like
"do the involved tables match (to be implemented)
binlog_[wild_]{do|ignore}_table?" (WL#1049)"
*/
const char *local_db= event_info->get_db();
bool option_bin_log_flag= (thd->variables.option_bits & OPTION_BIN_LOG);
/*
Log all updates to binlog cache so that they can get replicated to other
nodes. A check has been added to stop them from getting logged into
binary log files.
*/
if (WSREP(thd)) option_bin_log_flag= true;
if ((!(option_bin_log_flag)) ||
(thd->lex->sql_command != SQLCOM_ROLLBACK_TO_SAVEPOINT &&
thd->lex->sql_command != SQLCOM_SAVEPOINT &&
!binlog_filter->db_ok(local_db)))
DBUG_RETURN(0);
#endif /* HAVE_REPLICATION */
IO_CACHE *file= NULL;
if (direct)
{
int res;
uint64 commit_id= 0;
DBUG_PRINT("info", ("direct is set"));
if ((res= thd->wait_for_prior_commit()))
DBUG_RETURN(res);
file= &log_file;
my_org_b_tell= my_b_tell(file);
mysql_mutex_lock(&LOCK_log);
prev_binlog_id= current_binlog_id;
DBUG_EXECUTE_IF("binlog_force_commit_id",
{
const LEX_STRING commit_name= { C_STRING_WITH_LEN("commit_id") };
bool null_value;
user_var_entry *entry=
(user_var_entry*) my_hash_search(&thd->user_vars,
(uchar*) commit_name.str,
commit_name.length);
commit_id= entry->val_int(&null_value);
});
if (write_gtid_event(thd, true, using_trans, commit_id))
goto err;
}
else
{
binlog_cache_mngr *const cache_mngr= thd->binlog_setup_trx_data();
if (!cache_mngr)
goto err;
is_trans_cache= use_trans_cache(thd, using_trans);
file= cache_mngr->get_binlog_cache_log(is_trans_cache);
cache_data= cache_mngr->get_binlog_cache_data(is_trans_cache);
if (thd->lex->stmt_accessed_non_trans_temp_table())
cache_data->set_changes_to_non_trans_temp_table();
thd->binlog_start_trans_and_stmt();
}
DBUG_PRINT("info",("event type: %d",event_info->get_type_code()));
/*
No check for auto events flag here - this write method should
never be called if auto-events are enabled.
Write first log events which describe the 'run environment'
of the SQL command. If row-based binlogging, Insert_id, Rand
and other kind of "setting context" events are not needed.
*/
if (with_annotate && *with_annotate)
{
DBUG_ASSERT(event_info->get_type_code() == TABLE_MAP_EVENT);
Annotate_rows_log_event anno(thd, using_trans, direct);
/* Annotate event should be written not more than once */
*with_annotate= 0;
if (write_event(&anno, file))
goto err;
}
if (thd)
{
if (!thd->is_current_stmt_binlog_format_row())
{
if (thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt)
{
Intvar_log_event e(thd,(uchar) LAST_INSERT_ID_EVENT,
thd->first_successful_insert_id_in_prev_stmt_for_binlog,
using_trans, direct);
if (write_event(&e, file))
goto err;
}
if (thd->auto_inc_intervals_in_cur_stmt_for_binlog.nb_elements() > 0)
{
DBUG_PRINT("info",("number of auto_inc intervals: %u",
thd->auto_inc_intervals_in_cur_stmt_for_binlog.
nb_elements()));
Intvar_log_event e(thd, (uchar) INSERT_ID_EVENT,
thd->auto_inc_intervals_in_cur_stmt_for_binlog.
minimum(), using_trans, direct);
if (write_event(&e, file))
goto err;
}
if (thd->rand_used)
{
Rand_log_event e(thd,thd->rand_saved_seed1,thd->rand_saved_seed2,
using_trans, direct);
if (write_event(&e, file))
goto err;
}
if (thd->user_var_events.elements)
{
for (uint i= 0; i < thd->user_var_events.elements; i++)
{
BINLOG_USER_VAR_EVENT *user_var_event;
get_dynamic(&thd->user_var_events,(uchar*) &user_var_event, i);
/* setting flags for user var log event */
uchar flags= User_var_log_event::UNDEF_F;
if (user_var_event->unsigned_flag)
flags|= User_var_log_event::UNSIGNED_F;
User_var_log_event e(thd, user_var_event->user_var_event->name.str,
user_var_event->user_var_event->name.length,
user_var_event->value,
user_var_event->length,
user_var_event->type,
user_var_event->charset_number,
flags,
using_trans,
direct);
if (write_event(&e, file))
goto err;
}
}
}
}
/*
Write the event.
*/
if (write_event(event_info, file) ||
DBUG_EVALUATE_IF("injecting_fault_writing", 1, 0))
goto err;
error= 0;
err:
if (direct)
{
my_off_t offset= my_b_tell(file);
bool check_purge= false;
if (!error)
{
bool synced;
if ((error= flush_and_sync(&synced)))
{
}
else
{
mysql_mutex_assert_not_owner(&LOCK_prepare_ordered);
mysql_mutex_assert_owner(&LOCK_log);
mysql_mutex_assert_not_owner(&LOCK_after_binlog_sync);
mysql_mutex_assert_not_owner(&LOCK_commit_ordered);
bool first= true;
bool last= true;
if ((error= RUN_HOOK(binlog_storage, after_flush,
(thd, log_file_name, file->pos_in_file,
synced, first, last))))
{
sql_print_error("Failed to run 'after_flush' hooks");
error= 1;
}
else
{
/* update binlog_end_pos so it can be read by dump thread
*
* note: must be _after_ the RUN_HOOK(after_flush) or else
* semi-sync-plugin might not have put the transaction into
* it's list before dump-thread tries to send it
*/
update_binlog_end_pos(offset);
signal_update();
if ((error= rotate(false, &check_purge)))
check_purge= false;
}
}
}
status_var_add(thd->status_var.binlog_bytes_written,
offset - my_org_b_tell);
mysql_mutex_lock(&LOCK_after_binlog_sync);
mysql_mutex_unlock(&LOCK_log);
mysql_mutex_assert_not_owner(&LOCK_prepare_ordered);
mysql_mutex_assert_not_owner(&LOCK_log);
mysql_mutex_assert_owner(&LOCK_after_binlog_sync);
mysql_mutex_assert_not_owner(&LOCK_commit_ordered);
bool first= true;
bool last= true;
if (RUN_HOOK(binlog_storage, after_sync,
(thd, log_file_name, file->pos_in_file,
first, last)))
{
error=1;
/* error is already printed inside hook */
}
/*
Take mutex to protect against a reader seeing partial writes of 64-bit
offset on 32-bit CPUs.
*/
mysql_mutex_lock(&LOCK_commit_ordered);
mysql_mutex_unlock(&LOCK_after_binlog_sync);
last_commit_pos_offset= offset;
mysql_mutex_unlock(&LOCK_commit_ordered);
if (check_purge)
checkpoint_and_purge(prev_binlog_id);
}
if (error)
{
set_write_error(thd, is_trans_cache);
if (check_write_error(thd) && cache_data &&
stmt_has_updated_non_trans_table(thd))
cache_data->set_incident();
}
}
DBUG_RETURN(error);
}
int error_log_print(enum loglevel level, const char *format,
va_list args)
{
return logger.error_log_print(level, format, args);
}
bool slow_log_print(THD *thd, const char *query, uint query_length,
ulonglong current_utime)
{
return logger.slow_log_print(thd, query, query_length, current_utime);
}
bool LOGGER::log_command(THD *thd, enum enum_server_command command)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
Security_context *sctx= thd->security_ctx;
#endif
/*
Log command if we have at least one log event handler enabled and want
to log this king of commands
*/
if (*general_log_handler_list && (what_to_log & (1L << (uint) command)))
{
if ((thd->variables.option_bits & OPTION_LOG_OFF)
#ifndef NO_EMBEDDED_ACCESS_CHECKS
&& (sctx->master_access & SUPER_ACL)
#endif
)
{
/* No logging */
return FALSE;
}
return TRUE;
}
return FALSE;
}
bool general_log_print(THD *thd, enum enum_server_command command,
const char *format, ...)
{
va_list args;
uint error= 0;
/* Print the message to the buffer if we want to log this king of commands */
if (! logger.log_command(thd, command))
return FALSE;
va_start(args, format);
error= logger.general_log_print(thd, command, format, args);
va_end(args);
return error;
}
bool general_log_write(THD *thd, enum enum_server_command command,
const char *query, uint query_length)
{
/* Write the message to the log if we want to log this king of commands */
if (logger.log_command(thd, command) || mysql_audit_general_enabled())
return logger.general_log_write(thd, command, query, query_length);
return FALSE;
}
static void
binlog_checkpoint_callback(void *cookie)
{
MYSQL_BIN_LOG::xid_count_per_binlog *entry=
(MYSQL_BIN_LOG::xid_count_per_binlog *)cookie;
/*
For every supporting engine, we increment the xid_count and issue a
commit_checkpoint_request(). Then we can count when all
commit_checkpoint_notify() callbacks have occurred, and then log a new
binlog checkpoint event.
*/
mysql_bin_log.mark_xids_active(entry->binlog_id, 1);
}
/*
Request a commit checkpoint from each supporting engine.
This must be called after each binlog rotate, and after LOCK_log has been
released. The xid_count value in the xid_count_per_binlog entry was
incremented by 1 and will be decremented in this function; this ensures
that the entry will not go away early despite LOCK_log not being held.
*/
void
MYSQL_BIN_LOG::do_checkpoint_request(ulong binlog_id)
{
xid_count_per_binlog *entry;
/*
Find the binlog entry, and invoke commit_checkpoint_request() on it in
each supporting storage engine.
*/
mysql_mutex_lock(&LOCK_xid_list);
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
do {
entry= it++;
DBUG_ASSERT(entry /* binlog_id is always somewhere in the list. */);
} while (entry->binlog_id != binlog_id);
mysql_mutex_unlock(&LOCK_xid_list);
ha_commit_checkpoint_request(entry, binlog_checkpoint_callback);
/*
When we rotated the binlog, we incremented xid_count to make sure the
entry would not go away until this point, where we have done all necessary
commit_checkpoint_request() calls.
So now we can (and must) decrease the count - when it reaches zero, we
will know that both all pending unlog() and all pending
commit_checkpoint_notify() calls are done, and we can log a new binlog
checkpoint.
*/
mark_xid_done(binlog_id, true);
}
/**
The method executes rotation when LOCK_log is already acquired
by the caller.
@param force_rotate caller can request the log rotation
@param check_purge is set to true if rotation took place
@note
Caller _must_ check the check_purge variable. If this is set, it means
that the binlog was rotated, and caller _must_ ensure that
do_checkpoint_request() is called later with the binlog_id of the rotated
binlog file. The call to do_checkpoint_request() must happen after
LOCK_log is released (which is why we cannot simply do it here).
Usually, checkpoint_and_purge() is appropriate, as it will both handle
the checkpointing and any needed purging of old logs.
@note
If rotation fails, for instance the server was unable
to create a new log file, we still try to write an
incident event to the current log.
@retval
nonzero - error in rotating routine.
*/
int MYSQL_BIN_LOG::rotate(bool force_rotate, bool* check_purge)
{
int error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::rotate");
if (wsrep_to_isolation)
{
DBUG_ASSERT(WSREP_ON);
*check_purge= false;
WSREP_DEBUG("avoiding binlog rotate due to TO isolation: %d",
wsrep_to_isolation);
DBUG_RETURN(0);
}
//todo: fix the macro def and restore safe_mutex_assert_owner(&LOCK_log);
*check_purge= false;
if (force_rotate || (my_b_tell(&log_file) >= (my_off_t) max_size))
{
ulong binlog_id= current_binlog_id;
/*
We rotate the binlog, so we need to start a commit checkpoint in all
supporting engines - when it finishes, we can log a new binlog checkpoint
event.
But we cannot start the checkpoint here - there could be a group commit
still in progress which needs to be included in the checkpoint, and
besides we do not want to do the (possibly expensive) checkpoint while
LOCK_log is held.
On the other hand, we must be sure that the xid_count entry for the
previous log does not go away until we start the checkpoint - which it
could do as it is no longer the most recent. So we increment xid_count
(to count the pending checkpoint request) - this will fix the entry in
place until we decrement again in do_checkpoint_request().
*/
mark_xids_active(binlog_id, 1);
if ((error= new_file_without_locking()))
{
/**
Be conservative... There are possible lost events (eg,
failing to log the Execute_load_query_log_event
on a LOAD DATA while using a non-transactional
table)!
We give it a shot and try to write an incident event anyway
to the current log.
*/
if (!write_incident_already_locked(current_thd))
flush_and_sync(0);
/*
We failed to rotate - so we have to decrement the xid_count back that
we incremented before attempting the rotate.
*/
mark_xid_done(binlog_id, false);
}
else
*check_purge= true;
}
DBUG_RETURN(error);
}
/**
The method executes logs purging routine.
@retval
nonzero - error in rotating routine.
*/
void MYSQL_BIN_LOG::purge()
{
mysql_mutex_assert_not_owner(&LOCK_log);
#ifdef HAVE_REPLICATION
if (expire_logs_days)
{
DEBUG_SYNC(current_thd, "at_purge_logs_before_date");
time_t purge_time= my_time(0) - expire_logs_days*24*60*60;
if (purge_time >= 0)
{
purge_logs_before_date(purge_time);
}
DEBUG_SYNC(current_thd, "after_purge_logs_before_date");
}
#endif
}
void MYSQL_BIN_LOG::checkpoint_and_purge(ulong binlog_id)
{
do_checkpoint_request(binlog_id);
purge();
}
/**
The method is a shortcut of @c rotate() and @c purge().
LOCK_log is acquired prior to rotate and is released after it.
@param force_rotate caller can request the log rotation
@retval
nonzero - error in rotating routine.
*/
int MYSQL_BIN_LOG::rotate_and_purge(bool force_rotate)
{
int error= 0;
ulong prev_binlog_id;
DBUG_ENTER("MYSQL_BIN_LOG::rotate_and_purge");
bool check_purge= false;
mysql_mutex_lock(&LOCK_log);
prev_binlog_id= current_binlog_id;
if ((error= rotate(force_rotate, &check_purge)))
check_purge= false;
/*
NOTE: Run purge_logs wo/ holding LOCK_log because it does not need
the mutex. Otherwise causes various deadlocks.
*/
mysql_mutex_unlock(&LOCK_log);
if (check_purge)
checkpoint_and_purge(prev_binlog_id);
DBUG_RETURN(error);
}
uint MYSQL_BIN_LOG::next_file_id()
{
uint res;
mysql_mutex_lock(&LOCK_log);
res = file_id++;
mysql_mutex_unlock(&LOCK_log);
return res;
}
class CacheWriter: public Log_event_writer
{
public:
ulong remains;
CacheWriter(THD *thd_arg, IO_CACHE *file_arg, bool do_checksum,
Binlog_crypt_data *cr)
: Log_event_writer(file_arg, cr), remains(0), thd(thd_arg), first(true)
{ checksum_len= do_checksum ? BINLOG_CHECKSUM_LEN : 0; }
~CacheWriter()
{ status_var_add(thd->status_var.binlog_bytes_written, bytes_written); }
int write(uchar* pos, size_t len)
{
if (first)
write_header(pos, len);
else
write_data(pos, len);
remains -= len;
if ((first= !remains))
write_footer();
return 0;
}
private:
THD *thd;
bool first;
};
/*
Write the contents of a cache to the binary log.
SYNOPSIS
write_cache()
thd Current_thread
cache Cache to write to the binary log
DESCRIPTION
Write the contents of the cache to the binary log. The cache will
be reset as a READ_CACHE to be able to read the contents from it.
Reading from the trans cache with possible (per @c binlog_checksum_options)
adding checksum value and then fixing the length and the end_log_pos of
events prior to fill in the binlog cache.
*/
int MYSQL_BIN_LOG::write_cache(THD *thd, IO_CACHE *cache)
{
DBUG_ENTER("MYSQL_BIN_LOG::write_cache");
mysql_mutex_assert_owner(&LOCK_log);
if (reinit_io_cache(cache, READ_CACHE, 0, 0, 0))
DBUG_RETURN(ER_ERROR_ON_WRITE);
uint length= my_b_bytes_in_cache(cache), group, carry, hdr_offs;
long val;
ulong end_log_pos_inc= 0; // each event processed adds BINLOG_CHECKSUM_LEN 2 t
uchar header[LOG_EVENT_HEADER_LEN];
CacheWriter writer(thd, &log_file, binlog_checksum_options, &crypto);
if (crypto.scheme)
writer.ctx= alloca(crypto.ctx_size);
// while there is just one alg the following must hold:
DBUG_ASSERT(binlog_checksum_options == BINLOG_CHECKSUM_ALG_OFF ||
binlog_checksum_options == BINLOG_CHECKSUM_ALG_CRC32);
/*
The events in the buffer have incorrect end_log_pos data
(relative to beginning of group rather than absolute),
so we'll recalculate them in situ so the binlog is always
correct, even in the middle of a group. This is possible
because we now know the start position of the group (the
offset of this cache in the log, if you will); all we need
to do is to find all event-headers, and add the position of
the group to the end_log_pos of each event. This is pretty
straight forward, except that we read the cache in segments,
so an event-header might end up on the cache-border and get
split.
*/
group= (uint)my_b_tell(&log_file);
hdr_offs= carry= 0;
do
{
/*
if we only got a partial header in the last iteration,
get the other half now and process a full header.
*/
if (unlikely(carry > 0))
{
DBUG_ASSERT(carry < LOG_EVENT_HEADER_LEN);
uint tail= LOG_EVENT_HEADER_LEN - carry;
/* assemble both halves */
memcpy(&header[carry], (char *)cache->read_pos, tail);
ulong len= uint4korr(header + EVENT_LEN_OFFSET);
writer.remains= len;
/* fix end_log_pos */
end_log_pos_inc += writer.checksum_len;
val= uint4korr(header + LOG_POS_OFFSET) + group + end_log_pos_inc;
int4store(header + LOG_POS_OFFSET, val);
/* fix len */
len+= writer.checksum_len;
int4store(header + EVENT_LEN_OFFSET, len);
if (writer.write(header, LOG_EVENT_HEADER_LEN))
DBUG_RETURN(ER_ERROR_ON_WRITE);
cache->read_pos+= tail;
length-= tail;
carry= 0;
/* next event header at ... */
hdr_offs= len - LOG_EVENT_HEADER_LEN - writer.checksum_len;
}
/* if there is anything to write, process it. */
if (likely(length > 0))
{
DBUG_EXECUTE_IF("fail_binlog_write_1",
errno= 28; DBUG_RETURN(ER_ERROR_ON_WRITE););
/*
process all event-headers in this (partial) cache.
if next header is beyond current read-buffer,
we'll get it later (though not necessarily in the
very next iteration, just "eventually").
*/
if (hdr_offs >= length)
{
if (writer.write(cache->read_pos, length))
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
while (hdr_offs < length)
{
/*
finish off with remains of the last event that crawls
from previous into the current buffer
*/
if (writer.remains != 0)
{
if (writer.write(cache->read_pos, hdr_offs))
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
/*
partial header only? save what we can get, process once
we get the rest.
*/
if (hdr_offs + LOG_EVENT_HEADER_LEN > length)
{
carry= length - hdr_offs;
memcpy(header, (char *)cache->read_pos + hdr_offs, carry);
length= hdr_offs;
}
else
{
/* we've got a full event-header, and it came in one piece */
uchar *ev= (uchar *)cache->read_pos + hdr_offs;
uint ev_len= uint4korr(ev + EVENT_LEN_OFFSET); // netto len
uchar *log_pos= ev + LOG_POS_OFFSET;
end_log_pos_inc += writer.checksum_len;
/* fix end_log_pos */
val= uint4korr(log_pos) + group + end_log_pos_inc;
int4store(log_pos, val);
/* fix length */
int4store(ev + EVENT_LEN_OFFSET, ev_len + writer.checksum_len);
writer.remains= ev_len;
if (writer.write(ev, std::min<uint>(ev_len, length - hdr_offs)))
DBUG_RETURN(ER_ERROR_ON_WRITE);
/* next event header at ... */
hdr_offs += ev_len; // incr by the netto len
DBUG_ASSERT(!writer.checksum_len || writer.remains == 0 || hdr_offs >= length);
}
}
/*
Adjust hdr_offs. Note that it may still point beyond the segment
read in the next iteration; if the current event is very long,
it may take a couple of read-iterations (and subsequent adjustments
of hdr_offs) for it to point into the then-current segment.
If we have a split header (!carry), hdr_offs will be set at the
beginning of the next iteration, overwriting the value we set here:
*/
hdr_offs -= length;
}
} while ((length= my_b_fill(cache)));
DBUG_ASSERT(carry == 0);
DBUG_ASSERT(!writer.checksum_len || writer.remains == 0);
DBUG_RETURN(0); // All OK
}
/*
Helper function to get the error code of the query to be binlogged.
*/
int query_error_code(THD *thd, bool not_killed)
{
int error;
if (not_killed || (killed_mask_hard(thd->killed) == KILL_BAD_DATA))
{
error= thd->is_error() ? thd->get_stmt_da()->sql_errno() : 0;
/* thd->get_get_stmt_da()->sql_errno() might be ER_SERVER_SHUTDOWN or
ER_QUERY_INTERRUPTED, So here we need to make sure that error
is not set to these errors when specified not_killed by the
caller.
*/
if (error == ER_SERVER_SHUTDOWN || error == ER_QUERY_INTERRUPTED ||
error == ER_NEW_ABORTING_CONNECTION || error == ER_CONNECTION_KILLED)
error= 0;
}
else
{
/* killed status for DELAYED INSERT thread should never be used */
DBUG_ASSERT(!(thd->system_thread & SYSTEM_THREAD_DELAYED_INSERT));
error= thd->killed_errno();
}
return error;
}
bool MYSQL_BIN_LOG::write_incident_already_locked(THD *thd)
{
uint error= 0;
DBUG_ENTER("MYSQL_BIN_LOG::write_incident_already_locked");
Incident incident= INCIDENT_LOST_EVENTS;
Incident_log_event ev(thd, incident, write_error_msg);
if (likely(is_open()))
{
error= write_event(&ev);
status_var_add(thd->status_var.binlog_bytes_written, ev.data_written);
}
DBUG_RETURN(error);
}
bool MYSQL_BIN_LOG::write_incident(THD *thd)
{
uint error= 0;
my_off_t offset;
bool check_purge= false;
ulong prev_binlog_id;
DBUG_ENTER("MYSQL_BIN_LOG::write_incident");
mysql_mutex_lock(&LOCK_log);
if (likely(is_open()))
{
prev_binlog_id= current_binlog_id;
if (!(error= write_incident_already_locked(thd)) &&
!(error= flush_and_sync(0)))
{
signal_update();
if ((error= rotate(false, &check_purge)))
check_purge= false;
}
offset= my_b_tell(&log_file);
update_binlog_end_pos(offset);
/*
Take mutex to protect against a reader seeing partial writes of 64-bit
offset on 32-bit CPUs.
*/
mysql_mutex_lock(&LOCK_commit_ordered);
last_commit_pos_offset= offset;
mysql_mutex_unlock(&LOCK_commit_ordered);
mysql_mutex_unlock(&LOCK_log);
if (check_purge)
checkpoint_and_purge(prev_binlog_id);
}
else
{
mysql_mutex_unlock(&LOCK_log);
}
DBUG_RETURN(error);
}
void
MYSQL_BIN_LOG::write_binlog_checkpoint_event_already_locked(const char *name_arg, uint len)
{
my_off_t offset;
Binlog_checkpoint_log_event ev(name_arg, len);
/*
Note that we must sync the binlog checkpoint to disk.
Otherwise a subsequent log purge could delete binlogs that XA recovery
thinks are needed (even though they are not really).
*/
if (!write_event(&ev) && !flush_and_sync(0))
{
signal_update();
}
else
{
/*
If we fail to write the checkpoint event, something is probably really
bad with the binlog. We complain in the error log.
Note that failure to write binlog checkpoint does not compromise the
ability to do crash recovery - crash recovery will just have to scan a
bit more of the binlog than strictly necessary.
*/
sql_print_error("Failed to write binlog checkpoint event to binary log\n");
}
offset= my_b_tell(&log_file);
update_binlog_end_pos(offset);
/*
Take mutex to protect against a reader seeing partial writes of 64-bit
offset on 32-bit CPUs.
*/
mysql_mutex_lock(&LOCK_commit_ordered);
last_commit_pos_offset= offset;
mysql_mutex_unlock(&LOCK_commit_ordered);
}
/**
Write a cached log entry to the binary log.
- To support transaction over replication, we wrap the transaction
with BEGIN/COMMIT or BEGIN/ROLLBACK in the binary log.
We want to write a BEGIN/ROLLBACK block when a non-transactional table
was updated in a transaction which was rolled back. This is to ensure
that the same updates are run on the slave.
@param thd
@param cache The cache to copy to the binlog
@param commit_event The commit event to print after writing the
contents of the cache.
@param incident Defines if an incident event should be created to
notify that some non-transactional changes did
not get into the binlog.
@note
We only come here if there is something in the cache.
@note
The thing in the cache is always a complete transaction.
@note
'cache' needs to be reinitialized after this functions returns.
*/
bool
MYSQL_BIN_LOG::write_transaction_to_binlog(THD *thd,
binlog_cache_mngr *cache_mngr,
Log_event *end_ev, bool all,
bool using_stmt_cache,
bool using_trx_cache)
{
group_commit_entry entry;
Ha_trx_info *ha_info;
DBUG_ENTER("MYSQL_BIN_LOG::write_transaction_to_binlog");
/*
Control should not be allowed beyond this point in wsrep_emulate_bin_log
mode. Also, do not write the cached updates to binlog if binary logging is
disabled (log-bin/sql_log_bin).
*/
if (wsrep_emulate_bin_log || !(thd->variables.option_bits & OPTION_BIN_LOG))
DBUG_RETURN(0);
entry.thd= thd;
entry.cache_mngr= cache_mngr;
entry.error= 0;
entry.all= all;
entry.using_stmt_cache= using_stmt_cache;
entry.using_trx_cache= using_trx_cache;
entry.need_unlog= false;
ha_info= all ? thd->transaction.all.ha_list : thd->transaction.stmt.ha_list;
for (; ha_info; ha_info= ha_info->next())
{
if (ha_info->is_started() && ha_info->ht() != binlog_hton &&
!ha_info->ht()->commit_checkpoint_request)
entry.need_unlog= true;
break;
}
entry.end_event= end_ev;
if (cache_mngr->stmt_cache.has_incident() ||
cache_mngr->trx_cache.has_incident())
{
Incident_log_event inc_ev(thd, INCIDENT_LOST_EVENTS, write_error_msg);
entry.incident_event= &inc_ev;
DBUG_RETURN(write_transaction_to_binlog_events(&entry));
}
else
{
entry.incident_event= NULL;
DBUG_RETURN(write_transaction_to_binlog_events(&entry));
}
}
/*
Put a transaction that is ready to commit in the group commit queue.
The transaction is identified by the ENTRY object passed into this function.
To facilitate group commit for the binlog, we first queue up ourselves in
this function. Then later the first thread to enter the queue waits for
the LOCK_log mutex, and commits for everyone in the queue once it gets the
lock. Any other threads in the queue just wait for the first one to finish
the commit and wake them up. This way, all transactions in the queue get
committed in a single disk operation.
The main work in this function is when the commit in one transaction has
been marked to wait for the commit of another transaction to happen
first. This is used to support in-order parallel replication, where
transactions can execute out-of-order but need to be committed in-order with
how they happened on the master. The waiting of one commit on another needs
to be integrated with the group commit queue, to ensure that the waiting
transaction can participate in the same group commit as the waited-for
transaction.
So when we put a transaction in the queue, we check if there were other
transactions already prepared to commit but just waiting for the first one
to commit. If so, we add those to the queue as well, transitively for all
waiters.
And if a transaction is marked to wait for a prior transaction, but that
prior transaction is already queued for group commit, then we can queue the
new transaction directly to participate in the group commit.
@retval < 0 Error
@retval > 0 If queued as the first entry in the queue (meaning this
is the leader)
@retval 0 Otherwise (queued as participant, leader handles the commit)
*/
int
MYSQL_BIN_LOG::queue_for_group_commit(group_commit_entry *orig_entry)
{
group_commit_entry *entry, *orig_queue, *last;
wait_for_commit *cur;
wait_for_commit *wfc;
DBUG_ENTER("MYSQL_BIN_LOG::queue_for_group_commit");
/*
Check if we need to wait for another transaction to commit before us.
It is safe to do a quick check without lock first in the case where we do
not have to wait. But if the quick check shows we need to wait, we must do
another safe check under lock, to avoid the race where the other
transaction wakes us up between the check and the wait.
*/
wfc= orig_entry->thd->wait_for_commit_ptr;
orig_entry->queued_by_other= false;
if (wfc && wfc->waitee)
{
mysql_mutex_lock(&wfc->LOCK_wait_commit);
/*
Do an extra check here, this time safely under lock.
If waitee->commit_started is set, it means that the transaction we need
to wait for has already queued up for group commit. In this case it is
safe for us to queue up immediately as well, increasing the opprtunities
for group commit. Because waitee has taken the LOCK_prepare_ordered
before setting the flag, so there is no risk that we can queue ahead of
it.
*/
if (wfc->waitee && !wfc->waitee->commit_started)
{
PSI_stage_info old_stage;
wait_for_commit *loc_waitee;
/*
By setting wfc->opaque_pointer to our own entry, we mark that we are
ready to commit, but waiting for another transaction to commit before
us.
This other transaction may then take over the commit process for us to
get us included in its own group commit. If this happens, the
queued_by_other flag is set.
Setting this flag may or may not be seen by the other thread, but we
are safe in any case: The other thread will set queued_by_other under
its LOCK_wait_commit, and we will not check queued_by_other only after
we have been woken up.
*/
wfc->opaque_pointer= orig_entry;
DEBUG_SYNC(orig_entry->thd, "group_commit_waiting_for_prior");
orig_entry->thd->ENTER_COND(&wfc->COND_wait_commit,
&wfc->LOCK_wait_commit,
&stage_waiting_for_prior_transaction_to_commit,
&old_stage);
while ((loc_waitee= wfc->waitee) && !orig_entry->thd->check_killed())
mysql_cond_wait(&wfc->COND_wait_commit, &wfc->LOCK_wait_commit);
wfc->opaque_pointer= NULL;
DBUG_PRINT("info", ("After waiting for prior commit, queued_by_other=%d",
orig_entry->queued_by_other));
if (loc_waitee)
{
/* Wait terminated due to kill. */
mysql_mutex_lock(&loc_waitee->LOCK_wait_commit);
if (loc_waitee->wakeup_subsequent_commits_running ||
orig_entry->queued_by_other)
{
/* Our waitee is already waking us up, so ignore the kill. */
mysql_mutex_unlock(&loc_waitee->LOCK_wait_commit);
do
{
mysql_cond_wait(&wfc->COND_wait_commit, &wfc->LOCK_wait_commit);
} while (wfc->waitee);
}
else
{
/* We were killed, so remove us from the list of waitee. */
wfc->remove_from_list(&loc_waitee->subsequent_commits_list);
mysql_mutex_unlock(&loc_waitee->LOCK_wait_commit);
wfc->waitee= NULL;
orig_entry->thd->EXIT_COND(&old_stage);
/* Interrupted by kill. */
DEBUG_SYNC(orig_entry->thd, "group_commit_waiting_for_prior_killed");
wfc->wakeup_error= orig_entry->thd->killed_errno();
if (!wfc->wakeup_error)
wfc->wakeup_error= ER_QUERY_INTERRUPTED;
my_message(wfc->wakeup_error,
ER_THD(orig_entry->thd, wfc->wakeup_error), MYF(0));
DBUG_RETURN(-1);
}
}
orig_entry->thd->EXIT_COND(&old_stage);
}
else
mysql_mutex_unlock(&wfc->LOCK_wait_commit);
}
/*
If the transaction we were waiting for has already put us into the group
commit queue (and possibly already done the entire binlog commit for us),
then there is nothing else to do.
*/
if (orig_entry->queued_by_other)
DBUG_RETURN(0);
if (wfc && wfc->wakeup_error)
{
my_error(ER_PRIOR_COMMIT_FAILED, MYF(0));
DBUG_RETURN(-1);
}
/* Now enqueue ourselves in the group commit queue. */
DEBUG_SYNC(orig_entry->thd, "commit_before_enqueue");
orig_entry->thd->clear_wakeup_ready();
mysql_mutex_lock(&LOCK_prepare_ordered);
orig_queue= group_commit_queue;
/*
Iteratively process everything added to the queue, looking for waiters,
and their waiters, and so on. If a waiter is ready to commit, we
immediately add it to the queue, and mark it as queued_by_other.
This would be natural to do with recursion, but we want to avoid
potentially unbounded recursion blowing the C stack, so we use the list
approach instead.
We keep a list of the group_commit_entry of all the waiters that need to
be processed. Initially this list contains only the entry passed into this
function.
We process entries in the list one by one. The element currently being
processed is pointed to by `entry`, and the element at the end of the list
is pointed to by `last` (we do not use NULL to terminate the list).
As we process an entry, any waiters for that entry are added at the end of
the list, to be processed in subsequent iterations. The the entry is added
to the group_commit_queue. This continues until the list is exhausted,
with all entries ever added eventually processed.
The end result is a breath-first traversal of the tree of waiters,
re-using the `next' pointers of the group_commit_entry objects in place of
extra stack space in a recursive traversal.
The temporary list linked through these `next' pointers is not used by the
caller or any other function; it only exists while doing the iterative
tree traversal. After, all the processed entries are linked into the
group_commit_queue.
*/
cur= wfc;
last= orig_entry;
entry= orig_entry;
for (;;)
{
group_commit_entry *next_entry;
if (entry->cache_mngr->using_xa)
{
DEBUG_SYNC(entry->thd, "commit_before_prepare_ordered");
run_prepare_ordered(entry->thd, entry->all);
DEBUG_SYNC(entry->thd, "commit_after_prepare_ordered");
}
if (cur)
{
/*
Now that we have taken LOCK_prepare_ordered and will queue up in the
group commit queue, it is safe for following transactions to queue
themselves. We will grab here any transaction that is now ready to
queue up, but after that, more transactions may become ready while the
leader is waiting to start the group commit. So set the flag
`commit_started', so that later transactions can still participate in
the group commit..
*/
cur->commit_started= true;
/*
Check if this transaction has other transaction waiting for it to
commit.
If so, process the waiting transactions, and their waiters and so on,
transitively.
*/
if (cur->subsequent_commits_list)
{
wait_for_commit *waiter, **waiter_ptr;
mysql_mutex_lock(&cur->LOCK_wait_commit);
/*
Grab the list, now safely under lock, and process it if still
non-empty.
*/
waiter= cur->subsequent_commits_list;
waiter_ptr= &cur->subsequent_commits_list;
while (waiter)
{
wait_for_commit *next_waiter= waiter->next_subsequent_commit;
group_commit_entry *entry2=
(group_commit_entry *)waiter->opaque_pointer;
if (entry2)
{
/*
This is another transaction ready to be written to the binary
log. We can put it into the queue directly, without needing a
separate context switch to the other thread. We just set a flag
so that the other thread will know when it wakes up that it was
already processed.
So remove it from the list of our waiters, and instead put it at
the end of the list to be processed in a subsequent iteration of
the outer loop.
*/
*waiter_ptr= next_waiter;
entry2->queued_by_other= true;
last->next= entry2;
last= entry2;
/*
As a small optimisation, we do not actually need to set
entry2->next to NULL, as we can use the pointer `last' to check
for end-of-list.
*/
}
else
{
/*
This transaction is not ready to participate in the group commit
yet, so leave it in the waiter list. It might join the group
commit later, if it completes soon enough to do so (it will see
our wfc->commit_started flag set), or it might commit later in a
later group commit.
*/
waiter_ptr= &waiter->next_subsequent_commit;
}
waiter= next_waiter;
}
mysql_mutex_unlock(&cur->LOCK_wait_commit);
}
}
/*
Handle the heuristics that if another transaction is waiting for this
transaction (or if it does so later), then we want to trigger group
commit immediately, without waiting for the binlog_commit_wait_usec
timeout to expire.
*/
entry->thd->waiting_on_group_commit= true;
/* Add the entry to the group commit queue. */
next_entry= entry->next;
entry->next= group_commit_queue;
group_commit_queue= entry;
if (entry == last)
break;
/*
Move to the next entry in the flattened list of waiting transactions
that still need to be processed transitively.
*/
entry= next_entry;
DBUG_ASSERT(entry != NULL);
cur= entry->thd->wait_for_commit_ptr;
}
if (opt_binlog_commit_wait_count > 0 && orig_queue != NULL)
mysql_cond_signal(&COND_prepare_ordered);
mysql_mutex_unlock(&LOCK_prepare_ordered);
DEBUG_SYNC(orig_entry->thd, "commit_after_release_LOCK_prepare_ordered");
DBUG_PRINT("info", ("Queued for group commit as %s\n",
(orig_queue == NULL) ? "leader" : "participant"));
DBUG_RETURN(orig_queue == NULL);
}
bool
MYSQL_BIN_LOG::write_transaction_to_binlog_events(group_commit_entry *entry)
{
int is_leader= queue_for_group_commit(entry);
/*
The first in the queue handles group commit for all; the others just wait
to be signalled when group commit is done.
*/
if (is_leader < 0)
return true; /* Error */
else if (is_leader)
trx_group_commit_leader(entry);
else if (!entry->queued_by_other)
entry->thd->wait_for_wakeup_ready();
else
{
/*
If we were queued by another prior commit, then we are woken up
only when the leader has already completed the commit for us.
So nothing to do here then.
*/
}
if (!opt_optimize_thread_scheduling)
{
/* For the leader, trx_group_commit_leader() already took the lock. */
if (!is_leader)
mysql_mutex_lock(&LOCK_commit_ordered);
DEBUG_SYNC(entry->thd, "commit_loop_entry_commit_ordered");
++num_commits;
if (entry->cache_mngr->using_xa && !entry->error)
run_commit_ordered(entry->thd, entry->all);
group_commit_entry *next= entry->next;
if (!next)
{
group_commit_queue_busy= FALSE;
mysql_cond_signal(&COND_queue_busy);
DEBUG_SYNC(entry->thd, "commit_after_group_run_commit_ordered");
}
mysql_mutex_unlock(&LOCK_commit_ordered);
entry->thd->wakeup_subsequent_commits(entry->error);
if (next)
{
/*
Wake up the next thread in the group commit.
The next thread can be waiting in two different ways, depending on
whether it put itself in the queue, or if it was put in queue by us
because it had to wait for us to commit first.
So execute the appropriate wakeup, identified by the queued_by_other
field.
*/
if (next->queued_by_other)
next->thd->wait_for_commit_ptr->wakeup(entry->error);
else
next->thd->signal_wakeup_ready();
}
else
{
/*
If we rotated the binlog, and if we are using the unoptimized thread
scheduling where every thread runs its own commit_ordered(), then we
must do the commit checkpoint and log purge here, after all
commit_ordered() calls have finished, and locks have been released.
*/
if (entry->check_purge)
checkpoint_and_purge(entry->binlog_id);
}
}
if (likely(!entry->error))
return entry->thd->wait_for_prior_commit();
switch (entry->error)
{
case ER_ERROR_ON_WRITE:
my_error(ER_ERROR_ON_WRITE, MYF(ME_NOREFRESH), name, entry->commit_errno);
break;
case ER_ERROR_ON_READ:
my_error(ER_ERROR_ON_READ, MYF(ME_NOREFRESH),
entry->error_cache->file_name, entry->commit_errno);
break;
default:
/*
There are not (and should not be) any errors thrown not covered above.
But just in case one is added later without updating the above switch
statement, include a catch-all.
*/
my_printf_error(entry->error,
"Error writing transaction to binary log: %d",
MYF(ME_NOREFRESH), entry->error);
}
/*
Since we return error, this transaction XID will not be committed, so
we need to mark it as not needed for recovery (unlog() is not called
for a transaction if log_xid() fails).
*/
if (entry->cache_mngr->using_xa && entry->cache_mngr->xa_xid &&
entry->cache_mngr->need_unlog)
mark_xid_done(entry->cache_mngr->binlog_id, true);
return 1;
}
/*
Do binlog group commit as the lead thread.
This must be called when this statement/transaction is queued at the start of
the group_commit_queue. It will wait to obtain the LOCK_log mutex, then group
commit all the transactions in the queue (more may have entered while waiting
for LOCK_log). After commit is done, all other threads in the queue will be
signalled.
*/
void
MYSQL_BIN_LOG::trx_group_commit_leader(group_commit_entry *leader)
{
uint xid_count= 0;
my_off_t UNINIT_VAR(commit_offset);
group_commit_entry *current, *last_in_queue;
group_commit_entry *queue= NULL;
bool check_purge= false;
ulong UNINIT_VAR(binlog_id);
uint64 commit_id;
DBUG_ENTER("MYSQL_BIN_LOG::trx_group_commit_leader");
{
DBUG_EXECUTE_IF("inject_binlog_commit_before_get_LOCK_log",
DBUG_ASSERT(!debug_sync_set_action(leader->thd, STRING_WITH_LEN
("commit_before_get_LOCK_log SIGNAL waiting WAIT_FOR cont TIMEOUT 1")));
);
/*
Lock the LOCK_log(), and once we get it, collect any additional writes
that queued up while we were waiting.
*/
DEBUG_SYNC(leader->thd, "commit_before_get_LOCK_log");
mysql_mutex_lock(&LOCK_log);
DEBUG_SYNC(leader->thd, "commit_after_get_LOCK_log");
mysql_mutex_lock(&LOCK_prepare_ordered);
if (opt_binlog_commit_wait_count)
wait_for_sufficient_commits();
/*
Note that wait_for_sufficient_commits() may have released and
re-acquired the LOCK_log and LOCK_prepare_ordered if it needed to wait.
*/
current= group_commit_queue;
group_commit_queue= NULL;
mysql_mutex_unlock(&LOCK_prepare_ordered);
binlog_id= current_binlog_id;
/* As the queue is in reverse order of entering, reverse it. */
last_in_queue= current;
while (current)
{
group_commit_entry *next= current->next;
/*
Now that group commit is started, we can clear the flag; there is no
longer any use in waiters on this commit trying to trigger it early.
*/
current->thd->waiting_on_group_commit= false;
current->next= queue;
queue= current;
current= next;
}
DBUG_ASSERT(leader == queue /* the leader should be first in queue */);
/* Now we have in queue the list of transactions to be committed in order. */
}
DBUG_ASSERT(is_open());
if (likely(is_open())) // Should always be true
{
commit_id= (last_in_queue == leader ? 0 : (uint64)leader->thd->query_id);
DBUG_EXECUTE_IF("binlog_force_commit_id",
{
const LEX_STRING commit_name= { C_STRING_WITH_LEN("commit_id") };
bool null_value;
user_var_entry *entry=
(user_var_entry*) my_hash_search(&leader->thd->user_vars,
(uchar*) commit_name.str,
commit_name.length);
commit_id= entry->val_int(&null_value);
});
/*
Commit every transaction in the queue.
Note that we are doing this in a different thread than the one running
the transaction! So we are limited in the operations we can do. In
particular, we cannot call my_error() on behalf of a transaction, as
that obtains the THD from thread local storage. Instead, we must set
current->error and let the thread do the error reporting itself once
we wake it up.
*/
for (current= queue; current != NULL; current= current->next)
{
binlog_cache_mngr *cache_mngr= current->cache_mngr;
/*
We already checked before that at least one cache is non-empty; if both
are empty we would have skipped calling into here.
*/
DBUG_ASSERT(!cache_mngr->stmt_cache.empty() || !cache_mngr->trx_cache.empty());
if ((current->error= write_transaction_or_stmt(current, commit_id)))
current->commit_errno= errno;
strmake_buf(cache_mngr->last_commit_pos_file, log_file_name);
commit_offset= my_b_write_tell(&log_file);
cache_mngr->last_commit_pos_offset= commit_offset;
if (cache_mngr->using_xa && cache_mngr->xa_xid)
{
/*
If all storage engines support commit_checkpoint_request(), then we
do not need to keep track of when this XID is durably committed.
Instead we will just ask the storage engine to durably commit all its
XIDs when we rotate a binlog file.
*/
if (current->need_unlog)
{
xid_count++;
cache_mngr->need_unlog= true;
cache_mngr->binlog_id= binlog_id;
}
else
cache_mngr->need_unlog= false;
cache_mngr->delayed_error= false;
}
}
bool synced= 0;
if (flush_and_sync(&synced))
{
for (current= queue; current != NULL; current= current->next)
{
if (!current->error)
{
current->error= ER_ERROR_ON_WRITE;
current->commit_errno= errno;
current->error_cache= NULL;
}
}
}
else
{
bool any_error= false;
bool all_error= true;
mysql_mutex_assert_not_owner(&LOCK_prepare_ordered);
mysql_mutex_assert_owner(&LOCK_log);
mysql_mutex_assert_not_owner(&LOCK_after_binlog_sync);
mysql_mutex_assert_not_owner(&LOCK_commit_ordered);
bool first= true, last;
for (current= queue; current != NULL; current= current->next)
{
last= current->next == NULL;
if (!current->error &&
RUN_HOOK(binlog_storage, after_flush,
(current->thd,
current->cache_mngr->last_commit_pos_file,
current->cache_mngr->last_commit_pos_offset, synced,
first, last)))
{
current->error= ER_ERROR_ON_WRITE;
current->commit_errno= -1;
current->error_cache= NULL;
any_error= true;
}
else
all_error= false;
first= false;
}
/* update binlog_end_pos so it can be read by dump thread
*
* note: must be _after_ the RUN_HOOK(after_flush) or else
* semi-sync-plugin might not have put the transaction into
* it's list before dump-thread tries to send it
*/
update_binlog_end_pos(commit_offset);
if (any_error)
sql_print_error("Failed to run 'after_flush' hooks");
if (!all_error)
signal_update();
}
/*
If any commit_events are Xid_log_event, increase the number of pending
XIDs in current binlog (it's decreased in ::unlog()). When the count in
a (not active) binlog file reaches zero, we know that it is no longer
needed in XA recovery, and we can log a new binlog checkpoint event.
*/
if (xid_count > 0)
{
mark_xids_active(binlog_id, xid_count);
}
if (rotate(false, &check_purge))
{
/*
If we fail to rotate, which thread should get the error?
We give the error to the leader, as any my_error() thrown inside
rotate() will have been registered for the leader THD.
However we must not return error from here - that would cause
ha_commit_trans() to abort and rollback the transaction, which would
leave an inconsistent state with the transaction committed in the
binlog but rolled back in the engine.
Instead set a flag so that we can return error later, from unlog(),
when the transaction has been safely committed in the engine.
*/
leader->cache_mngr->delayed_error= true;
my_error(ER_ERROR_ON_WRITE, MYF(ME_NOREFRESH), name, errno);
check_purge= false;
}
/* In case of binlog rotate, update the correct current binlog offset. */
commit_offset= my_b_write_tell(&log_file);
}
DEBUG_SYNC(leader->thd, "commit_before_get_LOCK_after_binlog_sync");
mysql_mutex_lock(&LOCK_after_binlog_sync);
/*
We cannot unlock LOCK_log until we have locked LOCK_after_binlog_sync;
otherwise scheduling could allow the next group commit to run ahead of us,
messing up the order of commit_ordered() calls. But as soon as
LOCK_after_binlog_sync is obtained, we can let the next group commit start.
*/
mysql_mutex_unlock(&LOCK_log);
DEBUG_SYNC(leader->thd, "commit_after_release_LOCK_log");
/*
Loop through threads and run the binlog_sync hook
*/
{
mysql_mutex_assert_not_owner(&LOCK_prepare_ordered);
mysql_mutex_assert_not_owner(&LOCK_log);
mysql_mutex_assert_owner(&LOCK_after_binlog_sync);
mysql_mutex_assert_not_owner(&LOCK_commit_ordered);
bool first= true, last;
for (current= queue; current != NULL; current= current->next)
{
last= current->next == NULL;
if (!current->error &&
RUN_HOOK(binlog_storage, after_sync,
(current->thd, current->cache_mngr->last_commit_pos_file,
current->cache_mngr->last_commit_pos_offset,
first, last)))
{
/* error is already printed inside hook */
}
first= false;
}
}
DEBUG_SYNC(leader->thd, "commit_before_get_LOCK_commit_ordered");
mysql_mutex_lock(&LOCK_commit_ordered);
last_commit_pos_offset= commit_offset;
/*
Unlock LOCK_after_binlog_sync only *after* LOCK_commit_ordered has been
acquired so that groups can not reorder for the different stages of
the group commit procedure.
*/
mysql_mutex_unlock(&LOCK_after_binlog_sync);
DEBUG_SYNC(leader->thd, "commit_after_release_LOCK_after_binlog_sync");
++num_group_commits;
if (!opt_optimize_thread_scheduling)
{
/*
If we want to run commit_ordered() each in the transaction's own thread
context, then we need to mark the queue reserved; we need to finish all
threads in one group commit before the next group commit can be allowed
to proceed, and we cannot unlock a simple pthreads mutex in a different
thread from the one that locked it.
*/
while (group_commit_queue_busy)
mysql_cond_wait(&COND_queue_busy, &LOCK_commit_ordered);
group_commit_queue_busy= TRUE;
/*
Set these so parent can run checkpoint_and_purge() in last thread.
(When using optimized thread scheduling, we run checkpoint_and_purge()
in this function, so parent does not need to and we need not set these
values).
*/
last_in_queue->check_purge= check_purge;
last_in_queue->binlog_id= binlog_id;
/* Note that we return with LOCK_commit_ordered locked! */
DBUG_VOID_RETURN;
}
/*
Wakeup each participant waiting for our group commit, first calling the
commit_ordered() methods for any transactions doing 2-phase commit.
*/
current= queue;
while (current != NULL)
{
group_commit_entry *next;
DEBUG_SYNC(leader->thd, "commit_loop_entry_commit_ordered");
++num_commits;
if (current->cache_mngr->using_xa && !current->error &&
DBUG_EVALUATE_IF("skip_commit_ordered", 0, 1))
run_commit_ordered(current->thd, current->all);
current->thd->wakeup_subsequent_commits(current->error);
/*
Careful not to access current->next after waking up the other thread! As
it may change immediately after wakeup.
*/
next= current->next;
if (current != leader) // Don't wake up ourself
{
if (current->queued_by_other)
current->thd->wait_for_commit_ptr->wakeup(current->error);
else
current->thd->signal_wakeup_ready();
}
current= next;
}
DEBUG_SYNC(leader->thd, "commit_after_group_run_commit_ordered");
mysql_mutex_unlock(&LOCK_commit_ordered);
DEBUG_SYNC(leader->thd, "commit_after_group_release_commit_ordered");
if (check_purge)
checkpoint_and_purge(binlog_id);
DBUG_VOID_RETURN;
}
int
MYSQL_BIN_LOG::write_transaction_or_stmt(group_commit_entry *entry,
uint64 commit_id)
{
binlog_cache_mngr *mngr= entry->cache_mngr;
DBUG_ENTER("MYSQL_BIN_LOG::write_transaction_or_stmt");
if (write_gtid_event(entry->thd, false, entry->using_trx_cache, commit_id))
DBUG_RETURN(ER_ERROR_ON_WRITE);
if (entry->using_stmt_cache && !mngr->stmt_cache.empty() &&
write_cache(entry->thd, mngr->get_binlog_cache_log(FALSE)))
{
entry->error_cache= &mngr->stmt_cache.cache_log;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
if (entry->using_trx_cache && !mngr->trx_cache.empty())
{
DBUG_EXECUTE_IF("crash_before_writing_xid",
{
if ((write_cache(entry->thd,
mngr->get_binlog_cache_log(TRUE))))
DBUG_PRINT("info", ("error writing binlog cache"));
else
flush_and_sync(0);
DBUG_PRINT("info", ("crashing before writing xid"));
DBUG_SUICIDE();
});
if (write_cache(entry->thd, mngr->get_binlog_cache_log(TRUE)))
{
entry->error_cache= &mngr->trx_cache.cache_log;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
}
DBUG_EXECUTE_IF("inject_error_writing_xid",
{
entry->error_cache= NULL;
errno= 28;
DBUG_RETURN(ER_ERROR_ON_WRITE);
});
if (write_event(entry->end_event))
{
entry->error_cache= NULL;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
status_var_add(entry->thd->status_var.binlog_bytes_written,
entry->end_event->data_written);
if (entry->incident_event)
{
if (write_event(entry->incident_event))
{
entry->error_cache= NULL;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
}
if (mngr->get_binlog_cache_log(FALSE)->error) // Error on read
{
entry->error_cache= &mngr->stmt_cache.cache_log;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
if (mngr->get_binlog_cache_log(TRUE)->error) // Error on read
{
entry->error_cache= &mngr->trx_cache.cache_log;
DBUG_RETURN(ER_ERROR_ON_WRITE);
}
DBUG_RETURN(0);
}
/*
Wait for sufficient commits to queue up for group commit, according to the
values of binlog_commit_wait_count and binlog_commit_wait_usec.
Note that this function may release and re-acquire LOCK_log and
LOCK_prepare_ordered if it needs to wait.
*/
void
MYSQL_BIN_LOG::wait_for_sufficient_commits()
{
size_t count;
group_commit_entry *e;
group_commit_entry *last_head;
struct timespec wait_until;
mysql_mutex_assert_owner(&LOCK_log);
mysql_mutex_assert_owner(&LOCK_prepare_ordered);
for (e= last_head= group_commit_queue, count= 0; e; e= e->next)
{
if (++count >= opt_binlog_commit_wait_count)
{
group_commit_trigger_count++;
return;
}
if (unlikely(e->thd->has_waiter))
{
group_commit_trigger_lock_wait++;
return;
}
}
mysql_mutex_unlock(&LOCK_log);
set_timespec_nsec(wait_until, (ulonglong)1000*opt_binlog_commit_wait_usec);
for (;;)
{
int err;
group_commit_entry *head;
err= mysql_cond_timedwait(&COND_prepare_ordered, &LOCK_prepare_ordered,
&wait_until);
if (err == ETIMEDOUT)
{
group_commit_trigger_timeout++;
break;
}
if (unlikely(last_head->thd->has_waiter))
{
group_commit_trigger_lock_wait++;
break;
}
head= group_commit_queue;
for (e= head; e && e != last_head; e= e->next)
{
++count;
if (unlikely(e->thd->has_waiter))
{
group_commit_trigger_lock_wait++;
goto after_loop;
}
}
if (count >= opt_binlog_commit_wait_count)
{
group_commit_trigger_count++;
break;
}
last_head= head;
}
after_loop:
/*
We must not wait for LOCK_log while holding LOCK_prepare_ordered.
LOCK_log can be held for long periods (eg. we do I/O under it), while
LOCK_prepare_ordered must only be held for short periods.
In addition, waiting for LOCK_log while holding LOCK_prepare_ordered would
violate locking order of LOCK_log-before-LOCK_prepare_ordered. This could
cause SAFEMUTEX warnings (even if it cannot actually deadlock with current
code, as there can be at most one group commit leader thread at a time).
So release and re-acquire LOCK_prepare_ordered if we need to wait for the
LOCK_log.
*/
if (mysql_mutex_trylock(&LOCK_log))
{
mysql_mutex_unlock(&LOCK_prepare_ordered);
mysql_mutex_lock(&LOCK_log);
mysql_mutex_lock(&LOCK_prepare_ordered);
}
}
void
MYSQL_BIN_LOG::binlog_trigger_immediate_group_commit()
{
group_commit_entry *head;
mysql_mutex_assert_owner(&LOCK_prepare_ordered);
head= group_commit_queue;
if (head)
{
head->thd->has_waiter= true;
mysql_cond_signal(&COND_prepare_ordered);
}
}
/*
This function is called when a transaction T1 goes to wait for another
transaction T2. It is used to cut short any binlog group commit delay from
--binlog-commit-wait-count in the case where another transaction is stalled
on the wait due to conflicting row locks.
If T2 is already ready to group commit, any waiting group commit will be
signalled to proceed immediately. Otherwise, a flag will be set in T2, and
when T2 later becomes ready, immediate group commit will be triggered.
*/
void
binlog_report_wait_for(THD *thd1, THD *thd2)
{
if (opt_binlog_commit_wait_count == 0)
return;
mysql_mutex_lock(&LOCK_prepare_ordered);
thd2->has_waiter= true;
if (thd2->waiting_on_group_commit)
mysql_bin_log.binlog_trigger_immediate_group_commit();
mysql_mutex_unlock(&LOCK_prepare_ordered);
}
/**
Wait until we get a signal that the relay log has been updated.
@param thd Thread variable
@note
One must have a lock on LOCK_log before calling this function.
This lock will be released before return! That's required by
THD::enter_cond() (see NOTES in sql_class.h).
*/
void MYSQL_BIN_LOG::wait_for_update_relay_log(THD* thd)
{
PSI_stage_info old_stage;
DBUG_ENTER("wait_for_update_relay_log");
mysql_mutex_assert_owner(&LOCK_log);
thd->ENTER_COND(&update_cond, &LOCK_log,
&stage_slave_has_read_all_relay_log,
&old_stage);
mysql_cond_wait(&update_cond, &LOCK_log);
thd->EXIT_COND(&old_stage);
DBUG_VOID_RETURN;
}
/**
Wait until we get a signal that the binary log has been updated.
Applies to master only.
NOTES
@param[in] thd a THD struct
@param[in] timeout a pointer to a timespec;
NULL means to wait w/o timeout.
@retval 0 if got signalled on update
@retval non-0 if wait timeout elapsed
@note
LOCK_log must be taken before calling this function.
LOCK_log is being released while the thread is waiting.
LOCK_log is released by the caller.
*/
int MYSQL_BIN_LOG::wait_for_update_bin_log(THD* thd,
const struct timespec *timeout)
{
int ret= 0;
DBUG_ENTER("wait_for_update_bin_log");
thd_wait_begin(thd, THD_WAIT_BINLOG);
mysql_mutex_assert_owner(&LOCK_log);
if (!timeout)
mysql_cond_wait(&update_cond, &LOCK_log);
else
ret= mysql_cond_timedwait(&update_cond, &LOCK_log,
const_cast<struct timespec *>(timeout));
thd_wait_end(thd);
DBUG_RETURN(ret);
}
int MYSQL_BIN_LOG::wait_for_update_binlog_end_pos(THD* thd,
struct timespec *timeout)
{
int ret= 0;
DBUG_ENTER("wait_for_update_binlog_end_pos");
thd_wait_begin(thd, THD_WAIT_BINLOG);
mysql_mutex_assert_owner(get_binlog_end_pos_lock());
if (!timeout)
mysql_cond_wait(&update_cond, get_binlog_end_pos_lock());
else
ret= mysql_cond_timedwait(&update_cond, get_binlog_end_pos_lock(),
timeout);
thd_wait_end(thd);
DBUG_RETURN(ret);
}
/**
Close the log file.
@param exiting Bitmask for one or more of the following bits:
- LOG_CLOSE_INDEX : if we should close the index file
- LOG_CLOSE_TO_BE_OPENED : if we intend to call open
at once after close.
- LOG_CLOSE_STOP_EVENT : write a 'stop' event to the log
- LOG_CLOSE_DELAYED_CLOSE : do not yet close the file and clear the
LOG_EVENT_BINLOG_IN_USE_F flag
@note
One can do an open on the object at once after doing a close.
The internal structures are not freed until cleanup() is called
*/
void MYSQL_BIN_LOG::close(uint exiting)
{ // One can't set log_type here!
bool failed_to_save_state= false;
DBUG_ENTER("MYSQL_BIN_LOG::close");
DBUG_PRINT("enter",("exiting: %d", (int) exiting));
mysql_mutex_assert_owner(&LOCK_log);
if (log_state == LOG_OPENED)
{
#ifdef HAVE_REPLICATION
if (log_type == LOG_BIN &&
(exiting & LOG_CLOSE_STOP_EVENT))
{
Stop_log_event s;
// the checksumming rule for relay-log case is similar to Rotate
s.checksum_alg= is_relay_log ? relay_log_checksum_alg
: (enum_binlog_checksum_alg)binlog_checksum_options;
DBUG_ASSERT(!is_relay_log ||
relay_log_checksum_alg != BINLOG_CHECKSUM_ALG_UNDEF);
write_event(&s);
bytes_written+= s.data_written;
signal_update();
/*
When we shut down server, write out the binlog state to a separate
file so we do not have to scan an entire binlog file to recover it
at next server start.
Note that this must be written and synced to disk before marking the
last binlog file as "not crashed".
*/
if (!is_relay_log && write_state_to_file())
{
sql_print_error("Failed to save binlog GTID state during shutdown. "
"Binlog will be marked as crashed, so that crash "
"recovery can recover the state at next server "
"startup.");
/*
Leave binlog file marked as crashed, so we can recover state by
scanning it now that we failed to write out the state properly.
*/
failed_to_save_state= true;
}
}
#endif /* HAVE_REPLICATION */
/* don't pwrite in a file opened with O_APPEND - it doesn't work */
if (log_file.type == WRITE_CACHE && log_type == LOG_BIN
&& !(exiting & LOG_CLOSE_DELAYED_CLOSE))
{
my_off_t org_position= mysql_file_tell(log_file.file, MYF(0));
if (!failed_to_save_state)
clear_inuse_flag_when_closing(log_file.file);
/*
Restore position so that anything we have in the IO_cache is written
to the correct position.
We need the seek here, as mysql_file_pwrite() is not guaranteed to keep the
original position on system that doesn't support pwrite().
*/
mysql_file_seek(log_file.file, org_position, MY_SEEK_SET, MYF(0));
}
/* this will cleanup IO_CACHE, sync and close the file */
MYSQL_LOG::close(exiting);
}
/*
The following test is needed even if is_open() is not set, as we may have
called a not complete close earlier and the index file is still open.
*/
if ((exiting & LOG_CLOSE_INDEX) && my_b_inited(&index_file))
{
end_io_cache(&index_file);
if (mysql_file_close(index_file.file, MYF(0)) < 0 && ! write_error)
{
write_error= 1;
sql_print_error(ER_THD_OR_DEFAULT(current_thd, ER_ERROR_ON_WRITE),
index_file_name, errno);
}
}
log_state= (exiting & LOG_CLOSE_TO_BE_OPENED) ? LOG_TO_BE_OPENED : LOG_CLOSED;
my_free(name);
name= NULL;
DBUG_VOID_RETURN;
}
/*
Clear the LOG_EVENT_BINLOG_IN_USE_F; this marks the binlog file as cleanly
closed and not needing crash recovery.
*/
void MYSQL_BIN_LOG::clear_inuse_flag_when_closing(File file)
{
my_off_t offset= BIN_LOG_HEADER_SIZE + FLAGS_OFFSET;
uchar flags= 0; // clearing LOG_EVENT_BINLOG_IN_USE_F
mysql_file_pwrite(file, &flags, 1, offset, MYF(0));
}
void MYSQL_BIN_LOG::set_max_size(ulong max_size_arg)
{
/*
We need to take locks, otherwise this may happen:
new_file() is called, calls open(old_max_size), then before open() starts,
set_max_size() sets max_size to max_size_arg, then open() starts and
uses the old_max_size argument, so max_size_arg has been overwritten and
it's like if the SET command was never run.
*/
DBUG_ENTER("MYSQL_BIN_LOG::set_max_size");
mysql_mutex_lock(&LOCK_log);
if (is_open())
max_size= max_size_arg;
mysql_mutex_unlock(&LOCK_log);
DBUG_VOID_RETURN;
}
/**
Check if a string is a valid number.
@param str String to test
@param res Store value here
@param allow_wildcards Set to 1 if we should ignore '%' and '_'
@note
For the moment the allow_wildcards argument is not used
Should be move to some other file.
@retval
1 String is a number
@retval
0 String is not a number
*/
static bool test_if_number(register const char *str,
ulong *res, bool allow_wildcards)
{
reg2 int flag;
const char *start;
DBUG_ENTER("test_if_number");
flag=0; start=str;
while (*str++ == ' ') ;
if (*--str == '-' || *str == '+')
str++;
while (my_isdigit(files_charset_info,*str) ||
(allow_wildcards && (*str == wild_many || *str == wild_one)))
{
flag=1;
str++;
}
if (*str == '.')
{
for (str++ ;
my_isdigit(files_charset_info,*str) ||
(allow_wildcards && (*str == wild_many || *str == wild_one)) ;
str++, flag=1) ;
}
if (*str != 0 || flag == 0)
DBUG_RETURN(0);
if (res)
*res=atol(start);
DBUG_RETURN(1); /* Number ok */
} /* test_if_number */
void sql_perror(const char *message)
{
#if defined(_WIN32)
char* buf;
DWORD dw= GetLastError();
if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&buf, 0, NULL ) > 0)
{
sql_print_error("%s: %s",message, buf);
LocalFree((HLOCAL)buf);
}
else
{
sql_print_error("%s", message);
}
#elif defined(HAVE_STRERROR)
sql_print_error("%s: %s",message, strerror(errno));
#else
perror(message);
#endif
}
/*
Change the file associated with two output streams. Used to
redirect stdout and stderr to a file. The streams are reopened
only for appending (writing at end of file).
*/
extern "C" my_bool reopen_fstreams(const char *filename,
FILE *outstream, FILE *errstream)
{
if (outstream && !my_freopen(filename, "a", outstream))
return TRUE;
if (errstream && !my_freopen(filename, "a", errstream))
return TRUE;
/* The error stream must be unbuffered. */
if (errstream)
setbuf(errstream, NULL);
return FALSE;
}
/*
Unfortunately, there seems to be no good way
to restore the original streams upon failure.
*/
static bool redirect_std_streams(const char *file)
{
if (reopen_fstreams(file, stdout, stderr))
return TRUE;
setbuf(stderr, NULL);
return FALSE;
}
bool flush_error_log()
{
bool result= 0;
if (opt_error_log)
{
mysql_mutex_lock(&LOCK_error_log);
if (redirect_std_streams(log_error_file))
result= 1;
mysql_mutex_unlock(&LOCK_error_log);
}
return result;
}
void MYSQL_BIN_LOG::signal_update()
{
DBUG_ENTER("MYSQL_BIN_LOG::signal_update");
signal_cnt++;
mysql_cond_broadcast(&update_cond);
DBUG_VOID_RETURN;
}
#ifdef _WIN32
static void print_buffer_to_nt_eventlog(enum loglevel level, char *buff,
size_t length, size_t buffLen)
{
HANDLE event;
char *buffptr= buff;
DBUG_ENTER("print_buffer_to_nt_eventlog");
/* Add ending CR/LF's to string, overwrite last chars if necessary */
strmov(buffptr+MY_MIN(length, buffLen-5), "\r\n\r\n");
setup_windows_event_source();
if ((event= RegisterEventSource(NULL,"MySQL")))
{
switch (level) {
case ERROR_LEVEL:
ReportEvent(event, EVENTLOG_ERROR_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
(LPCSTR*)&buffptr, NULL);
break;
case WARNING_LEVEL:
ReportEvent(event, EVENTLOG_WARNING_TYPE, 0, MSG_DEFAULT, NULL, 1, 0,
(LPCSTR*) &buffptr, NULL);
break;
case INFORMATION_LEVEL:
ReportEvent(event, EVENTLOG_INFORMATION_TYPE, 0, MSG_DEFAULT, NULL, 1,
0, (LPCSTR*) &buffptr, NULL);
break;
}
DeregisterEventSource(event);
}
DBUG_VOID_RETURN;
}
#endif /* _WIN32 */
#ifndef EMBEDDED_LIBRARY
static void print_buffer_to_file(enum loglevel level, const char *buffer,
size_t length)
{
time_t skr;
struct tm tm_tmp;
struct tm *start;
THD *thd;
int tag_length= 0;
char tag[NAME_LEN];
DBUG_ENTER("print_buffer_to_file");
DBUG_PRINT("enter",("buffer: %s", buffer));
if (mysqld_server_initialized && (thd= current_thd))
{
if (thd->connection_name.length)
{
/*
Add tag for slaves so that the user can see from which connection
the error originates.
*/
tag_length= my_snprintf(tag, sizeof(tag),
ER_THD(thd, ER_MASTER_LOG_PREFIX),
(int) thd->connection_name.length,
thd->connection_name.str);
}
}
mysql_mutex_lock(&LOCK_error_log);
skr= my_time(0);
localtime_r(&skr, &tm_tmp);
start=&tm_tmp;
fprintf(stderr, "%d-%02d-%02d %2d:%02d:%02d %lu [%s] %.*s%.*s\n",
start->tm_year + 1900,
start->tm_mon+1,
start->tm_mday,
start->tm_hour,
start->tm_min,
start->tm_sec,
(unsigned long) pthread_self(),
(level == ERROR_LEVEL ? "ERROR" : level == WARNING_LEVEL ?
"Warning" : "Note"),
tag_length, tag,
(int) length, buffer);
fflush(stderr);
mysql_mutex_unlock(&LOCK_error_log);
DBUG_VOID_RETURN;
}
/**
Prints a printf style message to the error log and, under NT, to the
Windows event log.
This function prints the message into a buffer and then sends that buffer
to other functions to write that message to other logging sources.
@param level The level of the msg significance
@param format Printf style format of message
@param args va_list list of arguments for the message
@returns
The function always returns 0. The return value is present in the
signature to be compatible with other logging routines, which could
return an error (e.g. logging to the log tables)
*/
int vprint_msg_to_log(enum loglevel level, const char *format, va_list args)
{
char buff[1024];
size_t length;
DBUG_ENTER("vprint_msg_to_log");
length= my_vsnprintf(buff, sizeof(buff), format, args);
print_buffer_to_file(level, buff, length);
#ifdef _WIN32
print_buffer_to_nt_eventlog(level, buff, length, sizeof(buff));
#endif
DBUG_RETURN(0);
}
#endif /* EMBEDDED_LIBRARY */
void sql_print_error(const char *format, ...)
{
va_list args;
DBUG_ENTER("sql_print_error");
va_start(args, format);
error_log_print(ERROR_LEVEL, format, args);
va_end(args);
DBUG_VOID_RETURN;
}
void sql_print_warning(const char *format, ...)
{
va_list args;
DBUG_ENTER("sql_print_warning");
va_start(args, format);
error_log_print(WARNING_LEVEL, format, args);
va_end(args);
DBUG_VOID_RETURN;
}
void sql_print_information(const char *format, ...)
{
va_list args;
DBUG_ENTER("sql_print_information");
if (disable_log_notes)
DBUG_VOID_RETURN; // Skip notes during start/shutdown
va_start(args, format);
error_log_print(INFORMATION_LEVEL, format, args);
va_end(args);
DBUG_VOID_RETURN;
}
void
TC_LOG::run_prepare_ordered(THD *thd, bool all)
{
Ha_trx_info *ha_info=
all ? thd->transaction.all.ha_list : thd->transaction.stmt.ha_list;
mysql_mutex_assert_owner(&LOCK_prepare_ordered);
for (; ha_info; ha_info= ha_info->next())
{
handlerton *ht= ha_info->ht();
if (!ht->prepare_ordered)
continue;
ht->prepare_ordered(ht, thd, all);
}
}
void
TC_LOG::run_commit_ordered(THD *thd, bool all)
{
Ha_trx_info *ha_info=
all ? thd->transaction.all.ha_list : thd->transaction.stmt.ha_list;
mysql_mutex_assert_owner(&LOCK_commit_ordered);
for (; ha_info; ha_info= ha_info->next())
{
handlerton *ht= ha_info->ht();
if (!ht->commit_ordered)
continue;
ht->commit_ordered(ht, thd, all);
DEBUG_SYNC(thd, "commit_after_run_commit_ordered");
}
}
int TC_LOG_MMAP::log_and_order(THD *thd, my_xid xid, bool all,
bool need_prepare_ordered,
bool need_commit_ordered)
{
int cookie;
struct commit_entry entry;
bool UNINIT_VAR(is_group_commit_leader);
if (need_prepare_ordered)
{
mysql_mutex_lock(&LOCK_prepare_ordered);
run_prepare_ordered(thd, all);
if (need_commit_ordered)
{
/*
Must put us in queue so we can run_commit_ordered() in same sequence
as we did run_prepare_ordered().
*/
thd->clear_wakeup_ready();
entry.thd= thd;
commit_entry *previous_queue= commit_ordered_queue;
entry.next= previous_queue;
commit_ordered_queue= &entry;
is_group_commit_leader= (previous_queue == NULL);
}
mysql_mutex_unlock(&LOCK_prepare_ordered);
}
if (thd->wait_for_prior_commit())
return 0;
cookie= 0;
if (xid)
cookie= log_one_transaction(xid);
if (need_commit_ordered)
{
if (need_prepare_ordered)
{
/*
We did the run_prepare_ordered() serialised, then ran the log_xid() in
parallel. Now we have to do run_commit_ordered() serialised in the
same sequence as run_prepare_ordered().
We do this starting from the head of the queue, each thread doing
run_commit_ordered() and signalling the next in queue.
*/
if (is_group_commit_leader)
{
/* The first in queue starts the ball rolling. */
mysql_mutex_lock(&LOCK_prepare_ordered);
while (commit_ordered_queue_busy)
mysql_cond_wait(&COND_queue_busy, &LOCK_prepare_ordered);
commit_entry *queue= commit_ordered_queue;
commit_ordered_queue= NULL;
/*
Mark the queue busy while we bounce it from one thread to the
next.
*/
commit_ordered_queue_busy= true;
mysql_mutex_unlock(&LOCK_prepare_ordered);
/* Reverse the queue list so we get correct order. */
commit_entry *prev= NULL;
while (queue)
{
commit_entry *next= queue->next;
queue->next= prev;
prev= queue;
queue= next;
}
DBUG_ASSERT(prev == &entry && prev->thd == thd);
}
else
{
/* Not first in queue; just wait until previous thread wakes us up. */
thd->wait_for_wakeup_ready();
}
}
/* Only run commit_ordered() if log_xid was successful. */
if (cookie)
{
mysql_mutex_lock(&LOCK_commit_ordered);
run_commit_ordered(thd, all);
mysql_mutex_unlock(&LOCK_commit_ordered);
}
if (need_prepare_ordered)
{
commit_entry *next= entry.next;
if (next)
{
next->thd->signal_wakeup_ready();
}
else
{
mysql_mutex_lock(&LOCK_prepare_ordered);
commit_ordered_queue_busy= false;
mysql_cond_signal(&COND_queue_busy);
mysql_mutex_unlock(&LOCK_prepare_ordered);
}
}
}
return cookie;
}
/********* transaction coordinator log for 2pc - mmap() based solution *******/
/*
the log consists of a file, mapped to memory.
file is divided into pages of tc_log_page_size size.
(usable size of the first page is smaller because of the log header)
there is a PAGE control structure for each page
each page (or rather its PAGE control structure) can be in one of
the three states - active, syncing, pool.
there could be only one page in the active or syncing state,
but many in pool - pool is a fifo queue.
the usual lifecycle of a page is pool->active->syncing->pool.
the "active" page is a page where new xid's are logged.
the page stays active as long as the syncing slot is taken.
the "syncing" page is being synced to disk. no new xid can be added to it.
when the syncing is done the page is moved to a pool and an active page
becomes "syncing".
the result of such an architecture is a natural "commit grouping" -
If commits are coming faster than the system can sync, they do not
stall. Instead, all commits that came since the last sync are
logged to the same "active" page, and they all are synced with the next -
one - sync. Thus, thought individual commits are delayed, throughput
is not decreasing.
when an xid is added to an active page, the thread of this xid waits
for a page's condition until the page is synced. when syncing slot
becomes vacant one of these waiters is awaken to take care of syncing.
it syncs the page and signals all waiters that the page is synced.
PAGE::waiters is used to count these waiters, and a page may never
become active again until waiters==0 (that is all waiters from the
previous sync have noticed that the sync was completed)
note, that the page becomes "dirty" and has to be synced only when a
new xid is added into it. Removing a xid from a page does not make it
dirty - we don't sync xid removals to disk.
*/
ulong tc_log_page_waits= 0;
#ifdef HAVE_MMAP
#define TC_LOG_HEADER_SIZE (sizeof(tc_log_magic)+1)
static const uchar tc_log_magic[]={(uchar) 254, 0x23, 0x05, 0x74};
ulong opt_tc_log_size;
ulong tc_log_max_pages_used=0, tc_log_page_size=0, tc_log_cur_pages_used=0;
int TC_LOG_MMAP::open(const char *opt_name)
{
uint i;
bool crashed=FALSE;
PAGE *pg;
DBUG_ASSERT(total_ha_2pc > 1);
DBUG_ASSERT(opt_name && opt_name[0]);
tc_log_page_size= my_getpagesize();
fn_format(logname,opt_name,mysql_data_home,"",MY_UNPACK_FILENAME);
if ((fd= mysql_file_open(key_file_tclog, logname, O_RDWR, MYF(0))) < 0)
{
if (my_errno != ENOENT)
goto err;
if (using_heuristic_recover())
return 1;
if ((fd= mysql_file_create(key_file_tclog, logname, CREATE_MODE,
O_RDWR, MYF(MY_WME))) < 0)
goto err;
inited=1;
file_length= opt_tc_log_size;
if (mysql_file_chsize(fd, file_length, 0, MYF(MY_WME)))
goto err;
}
else
{
inited= 1;
crashed= TRUE;
sql_print_information("Recovering after a crash using %s", opt_name);
if (tc_heuristic_recover)
{
sql_print_error("Cannot perform automatic crash recovery when "
"--tc-heuristic-recover is used");
goto err;
}
file_length= mysql_file_seek(fd, 0L, MY_SEEK_END, MYF(MY_WME+MY_FAE));
if (file_length == MY_FILEPOS_ERROR || file_length % tc_log_page_size)
goto err;
}
data= (uchar *)my_mmap(0, (size_t)file_length, PROT_READ|PROT_WRITE,
MAP_NOSYNC|MAP_SHARED, fd, 0);
if (data == MAP_FAILED)
{
my_errno=errno;
goto err;
}
inited=2;
npages=(uint)file_length/tc_log_page_size;
if (npages < 3) // to guarantee non-empty pool
goto err;
if (!(pages=(PAGE *)my_malloc(npages*sizeof(PAGE), MYF(MY_WME|MY_ZEROFILL))))
goto err;
inited=3;
for (pg=pages, i=0; i < npages; i++, pg++)
{
pg->next=pg+1;
pg->waiters=0;
pg->state=PS_POOL;
mysql_mutex_init(key_PAGE_lock, &pg->lock, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_PAGE_cond, &pg->cond, 0);
pg->ptr= pg->start=(my_xid *)(data + i*tc_log_page_size);
pg->size=pg->free=tc_log_page_size/sizeof(my_xid);
pg->end=pg->start + pg->size;
}
pages[0].size=pages[0].free=
(tc_log_page_size-TC_LOG_HEADER_SIZE)/sizeof(my_xid);
pages[0].start=pages[0].end-pages[0].size;
pages[npages-1].next=0;
inited=4;
if (crashed && recover())
goto err;
memcpy(data, tc_log_magic, sizeof(tc_log_magic));
data[sizeof(tc_log_magic)]= (uchar)total_ha_2pc;
my_msync(fd, data, tc_log_page_size, MS_SYNC);
inited=5;
mysql_mutex_init(key_LOCK_sync, &LOCK_sync, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_LOCK_active, &LOCK_active, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_LOCK_pool, &LOCK_pool, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_LOCK_pending_checkpoint, &LOCK_pending_checkpoint,
MY_MUTEX_INIT_FAST);
mysql_cond_init(key_COND_active, &COND_active, 0);
mysql_cond_init(key_COND_pool, &COND_pool, 0);
mysql_cond_init(key_TC_LOG_MMAP_COND_queue_busy, &COND_queue_busy, 0);
inited=6;
syncing= 0;
active=pages;
DBUG_ASSERT(npages >= 2);
pool=pages+1;
pool_last_ptr= &((pages+npages-1)->next);
commit_ordered_queue= NULL;
commit_ordered_queue_busy= false;
return 0;
err:
close();
return 1;
}
/**
there is no active page, let's got one from the pool.
Two strategies here:
-# take the first from the pool
-# if there're waiters - take the one with the most free space.
@todo
page merging. try to allocate adjacent page first,
so that they can be flushed both in one sync
*/
void TC_LOG_MMAP::get_active_from_pool()
{
PAGE **p, **best_p=0;
int best_free;
mysql_mutex_lock(&LOCK_pool);
do
{
best_p= p= &pool;
if ((*p)->waiters == 0 && (*p)->free > 0) // can the first page be used ?
break; // yes - take it.
best_free=0; // no - trying second strategy
for (p=&(*p)->next; *p; p=&(*p)->next)
{
if ((*p)->waiters == 0 && (*p)->free > best_free)
{
best_free=(*p)->free;
best_p=p;
}
}
}
while ((*best_p == 0 || best_free == 0) && overflow());
mysql_mutex_assert_owner(&LOCK_active);
active=*best_p;
/* Unlink the page from the pool. */
if (!(*best_p)->next)
pool_last_ptr= best_p;
*best_p=(*best_p)->next;
mysql_mutex_unlock(&LOCK_pool);
mysql_mutex_lock(&active->lock);
if (active->free == active->size) // we've chosen an empty page
{
tc_log_cur_pages_used++;
set_if_bigger(tc_log_max_pages_used, tc_log_cur_pages_used);
}
}
/**
@todo
perhaps, increase log size ?
*/
int TC_LOG_MMAP::overflow()
{
/*
simple overflow handling - just wait
TODO perhaps, increase log size ?
let's check the behaviour of tc_log_page_waits first
*/
tc_log_page_waits++;
mysql_cond_wait(&COND_pool, &LOCK_pool);
return 1; // always return 1
}
/**
Record that transaction XID is committed on the persistent storage.
This function is called in the middle of two-phase commit:
First all resources prepare the transaction, then tc_log->log() is called,
then all resources commit the transaction, then tc_log->unlog() is called.
All access to active page is serialized but it's not a problem, as
we're assuming that fsync() will be a main bottleneck.
That is, parallelizing writes to log pages we'll decrease number of
threads waiting for a page, but then all these threads will be waiting
for a fsync() anyway
If tc_log == MYSQL_LOG then tc_log writes transaction to binlog and
records XID in a special Xid_log_event.
If tc_log = TC_LOG_MMAP then xid is written in a special memory-mapped
log.
@retval
0 - error
@retval
\# - otherwise, "cookie", a number that will be passed as an argument
to unlog() call. tc_log can define it any way it wants,
and use for whatever purposes. TC_LOG_MMAP sets it
to the position in memory where xid was logged to.
*/
int TC_LOG_MMAP::log_one_transaction(my_xid xid)
{
int err;
PAGE *p;
ulong cookie;
mysql_mutex_lock(&LOCK_active);
/*
if the active page is full - just wait...
frankly speaking, active->free here accessed outside of mutex
protection, but it's safe, because it only means we may miss an
unlog() for the active page, and we're not waiting for it here -
unlog() does not signal COND_active.
*/
while (unlikely(active && active->free == 0))
mysql_cond_wait(&COND_active, &LOCK_active);
/* no active page ? take one from the pool */
if (active == 0)
get_active_from_pool();
else
mysql_mutex_lock(&active->lock);
p=active;
/*
p->free is always > 0 here because to decrease it one needs
to take p->lock and before it one needs to take LOCK_active.
But checked that active->free > 0 under LOCK_active and
haven't release it ever since
*/
/* searching for an empty slot */
while (*p->ptr)
{
p->ptr++;
DBUG_ASSERT(p->ptr < p->end); // because p->free > 0
}
/* found! store xid there and mark the page dirty */
cookie= (ulong)((uchar *)p->ptr - data); // can never be zero
*p->ptr++= xid;
p->free--;
p->state= PS_DIRTY;
mysql_mutex_unlock(&p->lock);
mysql_mutex_lock(&LOCK_sync);
if (syncing)
{ // somebody's syncing. let's wait
mysql_mutex_unlock(&LOCK_active);
mysql_mutex_lock(&p->lock);
p->waiters++;
while (p->state == PS_DIRTY && syncing)
{
mysql_mutex_unlock(&p->lock);
mysql_cond_wait(&p->cond, &LOCK_sync);
mysql_mutex_lock(&p->lock);
}
p->waiters--;
err= p->state == PS_ERROR;
if (p->state != PS_DIRTY) // page was synced
{
mysql_mutex_unlock(&LOCK_sync);
if (p->waiters == 0)
mysql_cond_signal(&COND_pool); // in case somebody's waiting
mysql_mutex_unlock(&p->lock);
goto done; // we're done
}
DBUG_ASSERT(!syncing);
mysql_mutex_unlock(&p->lock);
syncing = p;
mysql_mutex_unlock(&LOCK_sync);
mysql_mutex_lock(&LOCK_active);
active=0; // page is not active anymore
mysql_cond_broadcast(&COND_active);
mysql_mutex_unlock(&LOCK_active);
}
else
{
syncing = p; // place is vacant - take it
mysql_mutex_unlock(&LOCK_sync);
active = 0; // page is not active anymore
mysql_cond_broadcast(&COND_active);
mysql_mutex_unlock(&LOCK_active);
}
err= sync();
done:
return err ? 0 : cookie;
}
int TC_LOG_MMAP::sync()
{
int err;
DBUG_ASSERT(syncing != active);
/*
sit down and relax - this can take a while...
note - no locks are held at this point
*/
err= my_msync(fd, syncing->start, syncing->size * sizeof(my_xid), MS_SYNC);
/* page is synced. let's move it to the pool */
mysql_mutex_lock(&LOCK_pool);
(*pool_last_ptr)=syncing;
pool_last_ptr=&(syncing->next);
syncing->next=0;
syncing->state= err ? PS_ERROR : PS_POOL;
mysql_cond_signal(&COND_pool); // in case somebody's waiting
mysql_mutex_unlock(&LOCK_pool);
/* marking 'syncing' slot free */
mysql_mutex_lock(&LOCK_sync);
mysql_cond_broadcast(&syncing->cond); // signal "sync done"
syncing=0;
/*
we check the "active" pointer without LOCK_active. Still, it's safe -
"active" can change from NULL to not NULL any time, but it
will take LOCK_sync before waiting on active->cond. That is, it can never
miss a signal.
And "active" can change to NULL only by the syncing thread
(the thread that will send a signal below)
*/
if (active)
mysql_cond_signal(&active->cond); // wake up a new syncer
mysql_mutex_unlock(&LOCK_sync);
return err;
}
static void
mmap_do_checkpoint_callback(void *data)
{
TC_LOG_MMAP::pending_cookies *pending=
static_cast<TC_LOG_MMAP::pending_cookies *>(data);
++pending->pending_count;
}
int TC_LOG_MMAP::unlog(ulong cookie, my_xid xid)
{
pending_cookies *full_buffer= NULL;
uint32 ncookies= tc_log_page_size / sizeof(my_xid);
DBUG_ASSERT(*(my_xid *)(data+cookie) == xid);
/*
Do not delete the entry immediately, as there may be participating storage
engines which implement commit_checkpoint_request(), and thus have not yet
flushed the commit durably to disk.
Instead put it in a queue - and periodically, we will request a checkpoint
from all engines and delete a whole batch at once.
*/
mysql_mutex_lock(&LOCK_pending_checkpoint);
if (pending_checkpoint == NULL)
{
uint32 size= sizeof(*pending_checkpoint) + sizeof(ulong) * (ncookies - 1);
if (!(pending_checkpoint=
(pending_cookies *)my_malloc(size, MYF(MY_ZEROFILL))))
{
my_error(ER_OUTOFMEMORY, MYF(0), size);
mysql_mutex_unlock(&LOCK_pending_checkpoint);
return 1;
}
}
pending_checkpoint->cookies[pending_checkpoint->count++]= cookie;
if (pending_checkpoint->count == ncookies)
{
full_buffer= pending_checkpoint;
pending_checkpoint= NULL;
}
mysql_mutex_unlock(&LOCK_pending_checkpoint);
if (full_buffer)
{
/*
We do an extra increment and notify here - this ensures that
things work also if there are no engines at all that support
commit_checkpoint_request.
*/
++full_buffer->pending_count;
ha_commit_checkpoint_request(full_buffer, mmap_do_checkpoint_callback);
commit_checkpoint_notify(full_buffer);
}
return 0;
}
void
TC_LOG_MMAP::commit_checkpoint_notify(void *cookie)
{
uint count;
pending_cookies *pending= static_cast<pending_cookies *>(cookie);
mysql_mutex_lock(&LOCK_pending_checkpoint);
DBUG_ASSERT(pending->pending_count > 0);
count= --pending->pending_count;
mysql_mutex_unlock(&LOCK_pending_checkpoint);
if (count == 0)
{
uint i;
for (i= 0; i < tc_log_page_size / sizeof(my_xid); ++i)
delete_entry(pending->cookies[i]);
my_free(pending);
}
}
/**
erase xid from the page, update page free space counters/pointers.
cookie points directly to the memory where xid was logged.
*/
int TC_LOG_MMAP::delete_entry(ulong cookie)
{
PAGE *p=pages+(cookie/tc_log_page_size);
my_xid *x=(my_xid *)(data+cookie);
DBUG_ASSERT(x >= p->start && x < p->end);
mysql_mutex_lock(&p->lock);
*x=0;
p->free++;
DBUG_ASSERT(p->free <= p->size);
set_if_smaller(p->ptr, x);
if (p->free == p->size) // the page is completely empty
statistic_decrement(tc_log_cur_pages_used, &LOCK_status);
if (p->waiters == 0) // the page is in pool and ready to rock
mysql_cond_signal(&COND_pool); // ping ... for overflow()
mysql_mutex_unlock(&p->lock);
return 0;
}
void TC_LOG_MMAP::close()
{
uint i;
switch (inited) {
case 6:
mysql_mutex_destroy(&LOCK_sync);
mysql_mutex_destroy(&LOCK_active);
mysql_mutex_destroy(&LOCK_pool);
mysql_mutex_destroy(&LOCK_pending_checkpoint);
mysql_cond_destroy(&COND_pool);
mysql_cond_destroy(&COND_active);
mysql_cond_destroy(&COND_queue_busy);
/* fall through */
case 5:
data[0]='A'; // garble the first (signature) byte, in case mysql_file_delete fails
/* fall through */
case 4:
for (i=0; i < npages; i++)
{
if (pages[i].ptr == 0)
break;
mysql_mutex_destroy(&pages[i].lock);
mysql_cond_destroy(&pages[i].cond);
}
/* fall through */
case 3:
my_free(pages);
/* fall through */
case 2:
my_munmap((char*)data, (size_t)file_length);
/* fall through */
case 1:
mysql_file_close(fd, MYF(0));
}
if (inited>=5) // cannot do in the switch because of Windows
mysql_file_delete(key_file_tclog, logname, MYF(MY_WME));
if (pending_checkpoint)
my_free(pending_checkpoint);
inited=0;
}
int TC_LOG_MMAP::recover()
{
HASH xids;
PAGE *p=pages, *end_p=pages+npages;
if (bcmp(data, tc_log_magic, sizeof(tc_log_magic)))
{
sql_print_error("Bad magic header in tc log");
goto err1;
}
/*
the first byte after magic signature is set to current
number of storage engines on startup
*/
if (data[sizeof(tc_log_magic)] > total_ha_2pc)
{
sql_print_error("Recovery failed! You must enable "
"all engines that were enabled at the moment of the crash");
goto err1;
}
if (my_hash_init(&xids, &my_charset_bin, tc_log_page_size/3, 0,
sizeof(my_xid), 0, 0, MYF(0)))
goto err1;
for ( ; p < end_p ; p++)
{
for (my_xid *x=p->start; x < p->end; x++)
if (*x && my_hash_insert(&xids, (uchar *)x))
goto err2; // OOM
}
if (ha_recover(&xids))
goto err2;
my_hash_free(&xids);
bzero(data, (size_t)file_length);
return 0;
err2:
my_hash_free(&xids);
err1:
sql_print_error("Crash recovery failed. Either correct the problem "
"(if it's, for example, out of memory error) and restart, "
"or delete tc log and start mysqld with "
"--tc-heuristic-recover={commit|rollback}");
return 1;
}
#endif
TC_LOG *tc_log;
TC_LOG_DUMMY tc_log_dummy;
TC_LOG_MMAP tc_log_mmap;
/**
Perform heuristic recovery, if --tc-heuristic-recover was used.
@note
no matter whether heuristic recovery was successful or not
mysqld must exit. So, return value is the same in both cases.
@retval
0 no heuristic recovery was requested
@retval
1 heuristic recovery was performed
*/
int TC_LOG::using_heuristic_recover()
{
if (!tc_heuristic_recover)
return 0;
sql_print_information("Heuristic crash recovery mode");
if (ha_recover(0))
sql_print_error("Heuristic crash recovery failed");
sql_print_information("Please restart mysqld without --tc-heuristic-recover");
return 1;
}
/****** transaction coordinator log for 2pc - binlog() based solution ******/
#define TC_LOG_BINLOG MYSQL_BIN_LOG
int TC_LOG_BINLOG::open(const char *opt_name)
{
int error= 1;
DBUG_ASSERT(total_ha_2pc > 1);
DBUG_ASSERT(opt_name && opt_name[0]);
if (!my_b_inited(&index_file))
{
/* There was a failure to open the index file, can't open the binlog */
cleanup();
return 1;
}
if (using_heuristic_recover())
{
/* generate a new binlog to mask a corrupted one */
open(opt_name, LOG_BIN, 0, 0, WRITE_CACHE, max_binlog_size, 0, TRUE);
cleanup();
return 1;
}
error= do_binlog_recovery(opt_name, true);
binlog_state_recover_done= true;
return error;
}
/** This is called on shutdown, after ha_panic. */
void TC_LOG_BINLOG::close()
{
}
/*
Do a binlog log_xid() for a group of transactions, linked through
thd->next_commit_ordered.
*/
int
TC_LOG_BINLOG::log_and_order(THD *thd, my_xid xid, bool all,
bool need_prepare_ordered __attribute__((unused)),
bool need_commit_ordered __attribute__((unused)))
{
int err;
DBUG_ENTER("TC_LOG_BINLOG::log_and_order");
binlog_cache_mngr *cache_mngr= thd->binlog_setup_trx_data();
if (!cache_mngr)
{
WSREP_DEBUG("Skipping empty log_xid: %s", thd->query());
DBUG_RETURN(0);
}
cache_mngr->using_xa= TRUE;
cache_mngr->xa_xid= xid;
err= binlog_commit_flush_xid_caches(thd, cache_mngr, all, xid);
DEBUG_SYNC(thd, "binlog_after_log_and_order");
if (err)
DBUG_RETURN(0);
/*
If using explicit user XA, we will not have XID. We must still return a
non-zero cookie (as zero cookie signals error).
*/
if (!xid || !cache_mngr->need_unlog)
DBUG_RETURN(BINLOG_COOKIE_DUMMY(cache_mngr->delayed_error));
else
DBUG_RETURN(BINLOG_COOKIE_MAKE(cache_mngr->binlog_id,
cache_mngr->delayed_error));
}
/*
After an XID is logged, we need to hold on to the current binlog file until
it is fully committed in the storage engine. The reason is that crash
recovery only looks at the latest binlog, so we must make sure there are no
outstanding prepared (but not committed) transactions before rotating the
binlog.
To handle this, we keep a count of outstanding XIDs. This function is used
to increase this count when committing one or more transactions to the
binary log.
*/
void
TC_LOG_BINLOG::mark_xids_active(ulong binlog_id, uint xid_count)
{
xid_count_per_binlog *b;
DBUG_ENTER("TC_LOG_BINLOG::mark_xids_active");
DBUG_PRINT("info", ("binlog_id=%lu xid_count=%u", binlog_id, xid_count));
mysql_mutex_lock(&LOCK_xid_list);
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
while ((b= it++))
{
if (b->binlog_id == binlog_id)
{
b->xid_count += xid_count;
break;
}
}
/*
As we do not delete elements until count reach zero, elements should always
be found.
*/
DBUG_ASSERT(b);
mysql_mutex_unlock(&LOCK_xid_list);
DBUG_VOID_RETURN;
}
/*
Once an XID is committed, it can no longer be needed during crash recovery,
as it has been durably recorded on disk as "committed".
This function is called to mark an XID this way. It needs to decrease the
count of pending XIDs in the corresponding binlog. When the count reaches
zero (for an "old" binlog that is not the active one), that binlog file no
longer need to be scanned during crash recovery, so we can log a new binlog
checkpoint.
*/
void
TC_LOG_BINLOG::mark_xid_done(ulong binlog_id, bool write_checkpoint)
{
xid_count_per_binlog *b;
bool first;
ulong current;
DBUG_ENTER("TC_LOG_BINLOG::mark_xid_done");
mysql_mutex_lock(&LOCK_xid_list);
current= current_binlog_id;
I_List_iterator<xid_count_per_binlog> it(binlog_xid_count_list);
first= true;
while ((b= it++))
{
if (b->binlog_id == binlog_id)
{
--b->xid_count;
break;
}
first= false;
}
/* Binlog is always found, as we do not remove until count reaches 0 */
DBUG_ASSERT(b);
/*
If a RESET MASTER is pending, we are about to remove all log files, and
the RESET MASTER thread is waiting for all pending unlog() calls to
complete while holding LOCK_log. In this case we should not log a binlog
checkpoint event (it would be deleted immediately anyway and we would
deadlock on LOCK_log) but just signal the thread.
*/
if (unlikely(reset_master_pending))
{
mysql_cond_broadcast(&COND_xid_list);
mysql_mutex_unlock(&LOCK_xid_list);
DBUG_VOID_RETURN;
}
if (likely(binlog_id == current) || b->xid_count != 0 || !first ||
!write_checkpoint)
{
/* No new binlog checkpoint reached yet. */
mysql_mutex_unlock(&LOCK_xid_list);
DBUG_VOID_RETURN;
}
/*
Now log a binlog checkpoint for the first binlog file with a non-zero count.
Note that it is possible (though perhaps unlikely) that when count of
binlog (N-2) drops to zero, binlog (N-1) is already at zero. So we may
need to skip several entries before we find the one to log in the binlog
checkpoint event.
We chain the locking of LOCK_xid_list and LOCK_log, so that we ensure that
Binlog_checkpoint_events are logged in order. This simplifies recovery a
bit, as it can just take the last binlog checkpoint in the log, rather
than compare all found against each other to find the one pointing to the
most recent binlog.
Note also that we need to first release LOCK_xid_list, then aquire
LOCK_log, then re-aquire LOCK_xid_list. If we were to take LOCK_log while
holding LOCK_xid_list, we might deadlock with other threads that take the
locks in the opposite order.
*/
++mark_xid_done_waiting;
mysql_mutex_unlock(&LOCK_xid_list);
mysql_mutex_lock(&LOCK_log);
mysql_mutex_lock(&LOCK_xid_list);
--mark_xid_done_waiting;
mysql_cond_broadcast(&COND_xid_list);
/* We need to reload current_binlog_id due to release/re-take of lock. */
current= current_binlog_id;
for (;;)
{
/* Remove initial element(s) with zero count. */
b= binlog_xid_count_list.head();
/*
We must not remove all elements in the list - the entry for the current
binlog must be present always.
*/
DBUG_ASSERT(b);
if (b->binlog_id == current || b->xid_count > 0)
break;
WSREP_XID_LIST_ENTRY("TC_LOG_BINLOG::mark_xid_done(): Removing "
"xid_list_entry for %s (%lu)", b);
my_free(binlog_xid_count_list.get());
}
mysql_mutex_unlock(&LOCK_xid_list);
write_binlog_checkpoint_event_already_locked(b->binlog_name,
b->binlog_name_len);
mysql_mutex_unlock(&LOCK_log);
DBUG_VOID_RETURN;
}
int TC_LOG_BINLOG::unlog(ulong cookie, my_xid xid)
{
DBUG_ENTER("TC_LOG_BINLOG::unlog");
if (!xid)
DBUG_RETURN(0);
if (!BINLOG_COOKIE_IS_DUMMY(cookie))
mark_xid_done(BINLOG_COOKIE_GET_ID(cookie), true);
/*
See comment in trx_group_commit_leader() - if rotate() gave a failure,
we delay the return of error code to here.
*/
DBUG_RETURN(BINLOG_COOKIE_GET_ERROR_FLAG(cookie));
}
void
TC_LOG_BINLOG::commit_checkpoint_notify(void *cookie)
{
xid_count_per_binlog *entry= static_cast<xid_count_per_binlog *>(cookie);
mysql_mutex_lock(&LOCK_binlog_background_thread);
entry->next_in_queue= binlog_background_thread_queue;
binlog_background_thread_queue= entry;
mysql_cond_signal(&COND_binlog_background_thread);
mysql_mutex_unlock(&LOCK_binlog_background_thread);
}
/*
Binlog background thread.
This thread is used to log binlog checkpoints in the background, rather than
in the context of random storage engine threads that happen to call
commit_checkpoint_notify_ha() and may not like the delays while syncing
binlog to disk or may not be setup with all my_thread_init() and other
necessary stuff.
In the future, this thread could also be used to do log rotation in the
background, which could elimiate all stalls around binlog rotations.
*/
pthread_handler_t
binlog_background_thread(void *arg __attribute__((unused)))
{
bool stop;
MYSQL_BIN_LOG::xid_count_per_binlog *queue, *next;
THD *thd;
my_thread_init();
DBUG_ENTER("binlog_background_thread");
thd= new THD(next_thread_id());
thd->system_thread= SYSTEM_THREAD_BINLOG_BACKGROUND;
thd->thread_stack= (char*) &thd; /* Set approximate stack start */
thd->store_globals();
thd->security_ctx->skip_grants();
thd->set_command(COM_DAEMON);
/*
Load the slave replication GTID state from the mysql.gtid_slave_pos
table.
This is mostly so that we can start our seq_no counter from the highest
seq_no seen by a slave. This way, we have a way to tell if a transaction
logged by ourselves as master is newer or older than a replicated
transaction.
*/
#ifdef HAVE_REPLICATION
if (rpl_load_gtid_slave_state(thd))
sql_print_warning("Failed to load slave replication state from table "
"%s.%s: %u: %s", "mysql",
rpl_gtid_slave_state_table_name.str,
thd->get_stmt_da()->sql_errno(),
thd->get_stmt_da()->message());
#endif
mysql_mutex_lock(&mysql_bin_log.LOCK_binlog_background_thread);
binlog_background_thread_started= true;
mysql_cond_signal(&mysql_bin_log.COND_binlog_background_thread_end);
mysql_mutex_unlock(&mysql_bin_log.LOCK_binlog_background_thread);
for (;;)
{
/*
Wait until there is something in the queue to process, or we are asked
to shut down.
*/
THD_STAGE_INFO(thd, stage_binlog_waiting_background_tasks);
mysql_mutex_lock(&mysql_bin_log.LOCK_binlog_background_thread);
for (;;)
{
stop= binlog_background_thread_stop;
queue= binlog_background_thread_queue;
if (stop && !mysql_bin_log.is_xidlist_idle())
{
/*
Delay stop until all pending binlog checkpoints have been processed.
*/
stop= false;
}
if (stop || queue)
break;
mysql_cond_wait(&mysql_bin_log.COND_binlog_background_thread,
&mysql_bin_log.LOCK_binlog_background_thread);
}
/* Grab the queue, if any. */
binlog_background_thread_queue= NULL;
mysql_mutex_unlock(&mysql_bin_log.LOCK_binlog_background_thread);
/* Process any incoming commit_checkpoint_notify() calls. */
DBUG_EXECUTE_IF("inject_binlog_background_thread_before_mark_xid_done",
DBUG_ASSERT(!debug_sync_set_action(
thd,
STRING_WITH_LEN("binlog_background_thread_before_mark_xid_done "
"SIGNAL injected_binlog_background_thread "
"WAIT_FOR something_that_will_never_happen "
"TIMEOUT 2")));
);
while (queue)
{
THD_STAGE_INFO(thd, stage_binlog_processing_checkpoint_notify);
DEBUG_SYNC(thd, "binlog_background_thread_before_mark_xid_done");
/* Set the thread start time */
thd->set_time();
/* Grab next pointer first, as mark_xid_done() may free the element. */
next= queue->next_in_queue;
mysql_bin_log.mark_xid_done(queue->binlog_id, true);
queue= next;
DBUG_EXECUTE_IF("binlog_background_checkpoint_processed",
DBUG_ASSERT(!debug_sync_set_action(
thd,
STRING_WITH_LEN("now SIGNAL binlog_background_checkpoint_processed")));
);
}
if (stop)
break;
}
THD_STAGE_INFO(thd, stage_binlog_stopping_background_thread);
/* No need to use mutex as thd is not linked into other threads */
delete thd;
my_thread_end();
/* Signal that we are (almost) stopped. */
mysql_mutex_lock(&mysql_bin_log.LOCK_binlog_background_thread);
binlog_background_thread_stop= false;
mysql_cond_signal(&mysql_bin_log.COND_binlog_background_thread_end);
mysql_mutex_unlock(&mysql_bin_log.LOCK_binlog_background_thread);
DBUG_RETURN(0);
}
#ifdef HAVE_PSI_INTERFACE
static PSI_thread_key key_thread_binlog;
static PSI_thread_info all_binlog_threads[]=
{
{ &key_thread_binlog, "binlog_background", PSI_FLAG_GLOBAL},
};
#endif /* HAVE_PSI_INTERFACE */
static bool
start_binlog_background_thread()
{
pthread_t th;
#ifdef HAVE_PSI_INTERFACE
if (PSI_server)
PSI_server->register_thread("sql", all_binlog_threads,
array_elements(all_binlog_threads));
#endif
if (mysql_thread_create(key_thread_binlog, &th, &connection_attrib,
binlog_background_thread, NULL))
return 1;
/*
Wait for the thread to have started (so we know that the slave replication
state is loaded and we have correct global_gtid_counter).
*/
mysql_mutex_lock(&mysql_bin_log.LOCK_binlog_background_thread);
while (!binlog_background_thread_started)
mysql_cond_wait(&mysql_bin_log.COND_binlog_background_thread_end,
&mysql_bin_log.LOCK_binlog_background_thread);
mysql_mutex_unlock(&mysql_bin_log.LOCK_binlog_background_thread);
return 0;
}
int TC_LOG_BINLOG::recover(LOG_INFO *linfo, const char *last_log_name,
IO_CACHE *first_log,
Format_description_log_event *fdle, bool do_xa)
{
Log_event *ev= NULL;
HASH xids;
MEM_ROOT mem_root;
char binlog_checkpoint_name[FN_REFLEN];
bool binlog_checkpoint_found;
bool first_round;
IO_CACHE log;
File file= -1;
const char *errmsg;
#ifdef HAVE_REPLICATION
rpl_gtid last_gtid;
bool last_gtid_standalone= false;
bool last_gtid_valid= false;
#endif
if (! fdle->is_valid() ||
(do_xa && my_hash_init(&xids, &my_charset_bin, TC_LOG_PAGE_SIZE/3, 0,
sizeof(my_xid), 0, 0, MYF(0))))
goto err1;
if (do_xa)
init_alloc_root(&mem_root, TC_LOG_PAGE_SIZE, TC_LOG_PAGE_SIZE, MYF(0));
fdle->flags&= ~LOG_EVENT_BINLOG_IN_USE_F; // abort on the first error
/*
Scan the binlog for XIDs that need to be committed if still in the
prepared stage.
Start with the latest binlog file, then continue with any other binlog
files if the last found binlog checkpoint indicates it is needed.
*/
binlog_checkpoint_found= false;
first_round= true;
for (;;)
{
while ((ev= Log_event::read_log_event(first_round ? first_log : &log,
0, fdle, opt_master_verify_checksum))
&& ev->is_valid())
{
enum Log_event_type typ= ev->get_type_code();
switch (typ)
{
case XID_EVENT:
{
if (do_xa)
{
Xid_log_event *xev=(Xid_log_event *)ev;
uchar *x= (uchar *) memdup_root(&mem_root, (uchar*) &xev->xid,
sizeof(xev->xid));
if (!x || my_hash_insert(&xids, x))
goto err2;
break;
}
}
case BINLOG_CHECKPOINT_EVENT:
if (first_round && do_xa)
{
uint dir_len;
Binlog_checkpoint_log_event *cev= (Binlog_checkpoint_log_event *)ev;
if (cev->binlog_file_len >= FN_REFLEN)
sql_print_warning("Incorrect binlog checkpoint event with too "
"long file name found.");
else
{
/*
Note that we cannot use make_log_name() here, as we have not yet
initialised MYSQL_BIN_LOG::log_file_name.
*/
dir_len= dirname_length(last_log_name);
strmake(strnmov(binlog_checkpoint_name, last_log_name, dir_len),
cev->binlog_file_name, FN_REFLEN - 1 - dir_len);
binlog_checkpoint_found= true;
}
}
break;
case GTID_LIST_EVENT:
if (first_round)
{
Gtid_list_log_event *glev= (Gtid_list_log_event *)ev;
/* Initialise the binlog state from the Gtid_list event. */
if (rpl_global_gtid_binlog_state.load(glev->list, glev->count))
goto err2;
}
break;
#ifdef HAVE_REPLICATION
case GTID_EVENT:
if (first_round)
{
Gtid_log_event *gev= (Gtid_log_event *)ev;
/* Update the binlog state with any GTID logged after Gtid_list. */
last_gtid.domain_id= gev->domain_id;
last_gtid.server_id= gev->server_id;
last_gtid.seq_no= gev->seq_no;
last_gtid_standalone=
((gev->flags2 & Gtid_log_event::FL_STANDALONE) ? true : false);
last_gtid_valid= true;
}
break;
#endif
case START_ENCRYPTION_EVENT:
{
if (fdle->start_decryption((Start_encryption_log_event*) ev))
goto err2;
}
break;
default:
/* Nothing. */
break;
}
#ifdef HAVE_REPLICATION
if (last_gtid_valid &&
((last_gtid_standalone && !ev->is_part_of_group(typ)) ||
(!last_gtid_standalone &&
(typ == XID_EVENT ||
(LOG_EVENT_IS_QUERY(typ) &&
(((Query_log_event *)ev)->is_commit() ||
((Query_log_event *)ev)->is_rollback()))))))
{
if (rpl_global_gtid_binlog_state.update_nolock(&last_gtid, false))
goto err2;
last_gtid_valid= false;
}
#endif
delete ev;
ev= NULL;
}
if (!do_xa)
break;
/*
If the last binlog checkpoint event points to an older log, we have to
scan all logs from there also, to get all possible XIDs to recover.
If there was no binlog checkpoint event at all, this means the log was
written by an older version of MariaDB (or MySQL) - these always have an
(implicit) binlog checkpoint event at the start of the last binlog file.
*/
if (first_round)
{
if (!binlog_checkpoint_found)
break;
first_round= false;
DBUG_EXECUTE_IF("xa_recover_expect_master_bin_000004",
if (0 != strcmp("./master-bin.000004", binlog_checkpoint_name) &&
0 != strcmp(".\\master-bin.000004", binlog_checkpoint_name))
DBUG_SUICIDE();
);
if (find_log_pos(linfo, binlog_checkpoint_name, 1))
{
sql_print_error("Binlog file '%s' not found in binlog index, needed "
"for recovery. Aborting.", binlog_checkpoint_name);
goto err2;
}
}
else
{
end_io_cache(&log);
mysql_file_close(file, MYF(MY_WME));
file= -1;
}
if (!strcmp(linfo->log_file_name, last_log_name))
break; // No more files to do
if ((file= open_binlog(&log, linfo->log_file_name, &errmsg)) < 0)
{
sql_print_error("%s", errmsg);
goto err2;
}
/*
We do not need to read the Format_description_log_event of other binlog
files. It is not possible for a binlog checkpoint to span multiple
binlog files written by different versions of the server. So we can use
the first one read for reading from all binlog files.
*/
if (find_next_log(linfo, 1))
{
sql_print_error("Error reading binlog files during recovery. Aborting.");
goto err2;
}
fdle->reset_crypto();
}
if (do_xa)
{
if (ha_recover(&xids))
goto err2;
free_root(&mem_root, MYF(0));
my_hash_free(&xids);
}
return 0;
err2:
delete ev;
if (file >= 0)
{
end_io_cache(&log);
mysql_file_close(file, MYF(MY_WME));
}
if (do_xa)
{
free_root(&mem_root, MYF(0));
my_hash_free(&xids);
}
err1:
sql_print_error("Crash recovery failed. Either correct the problem "
"(if it's, for example, out of memory error) and restart, "
"or delete (or rename) binary log and start mysqld with "
"--tc-heuristic-recover={commit|rollback}");
return 1;
}
int
MYSQL_BIN_LOG::do_binlog_recovery(const char *opt_name, bool do_xa_recovery)
{
LOG_INFO log_info;
const char *errmsg;
IO_CACHE log;
File file;
Log_event *ev= 0;
Format_description_log_event fdle(BINLOG_VERSION);
char log_name[FN_REFLEN];
int error;
if ((error= find_log_pos(&log_info, NullS, 1)))
{
/*
If there are no binlog files (LOG_INFO_EOF), then we still try to read
the .state file to restore the binlog state. This allows to copy a server
to provision a new one without copying the binlog files (except the
master-bin.state file) and still preserve the correct binlog state.
*/
if (error != LOG_INFO_EOF)
sql_print_error("find_log_pos() failed (error: %d)", error);
else
{
error= read_state_from_file();
if (error == 2)
{
/*
No binlog files and no binlog state is not an error (eg. just initial
server start after fresh installation).
*/
error= 0;
}
}
return error;
}
if (! fdle.is_valid())
return 1;
do
{
strmake_buf(log_name, log_info.log_file_name);
} while (!(error= find_next_log(&log_info, 1)));
if (error != LOG_INFO_EOF)
{
sql_print_error("find_log_pos() failed (error: %d)", error);
return error;
}
if ((file= open_binlog(&log, log_name, &errmsg)) < 0)
{
sql_print_error("%s", errmsg);
return 1;
}
if ((ev= Log_event::read_log_event(&log, 0, &fdle,
opt_master_verify_checksum)) &&
ev->get_type_code() == FORMAT_DESCRIPTION_EVENT)
{
if (ev->flags & LOG_EVENT_BINLOG_IN_USE_F)
{
sql_print_information("Recovering after a crash using %s", opt_name);
error= recover(&log_info, log_name, &log,
(Format_description_log_event *)ev, do_xa_recovery);
}
else
{
error= read_state_from_file();
if (error == 2)
{
/*
The binlog exists, but the .state file is missing. This is normal if
this is the first master start after a major upgrade to 10.0 (with
GTID support).
However, it could also be that the .state file was lost somehow, and
in this case it could be a serious issue, as we would set the wrong
binlog state in the next binlog file to be created, and GTID
processing would be corrupted. A common way would be copying files
from an old server to a new one and forgetting the .state file.
So in this case, we want to try to recover the binlog state by
scanning the last binlog file (but we do not need any XA recovery).
ToDo: We could avoid one scan at first start after major upgrade, by
detecting that there is no GTID_LIST event at the start of the
binlog file, and stopping the scan in that case.
*/
error= recover(&log_info, log_name, &log,
(Format_description_log_event *)ev, false);
}
}
}
delete ev;
end_io_cache(&log);
mysql_file_close(file, MYF(MY_WME));
return error;
}
#ifdef INNODB_COMPATIBILITY_HOOKS
/**
Get the file name of the MySQL binlog.
@return the name of the binlog file
*/
extern "C"
const char* mysql_bin_log_file_name(void)
{
return mysql_bin_log.get_log_fname();
}
/**
Get the current position of the MySQL binlog.
@return byte offset from the beginning of the binlog
*/
extern "C"
ulonglong mysql_bin_log_file_pos(void)
{
return (ulonglong) mysql_bin_log.get_log_file()->pos_in_file;
}
/*
Get the current position of the MySQL binlog for transaction currently being
committed.
This is valid to call from within storage engine commit_ordered() and
commit() methods only.
Since it stores the position inside THD, it is safe to call without any
locking.
*/
void
mysql_bin_log_commit_pos(THD *thd, ulonglong *out_pos, const char **out_file)
{
binlog_cache_mngr *cache_mngr;
if (opt_bin_log &&
(cache_mngr= (binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton)))
{
*out_file= cache_mngr->last_commit_pos_file;
*out_pos= (ulonglong)(cache_mngr->last_commit_pos_offset);
}
else
{
*out_file= NULL;
*out_pos= 0;
}
}
#endif /* INNODB_COMPATIBILITY_HOOKS */
static void
binlog_checksum_update(MYSQL_THD thd, struct st_mysql_sys_var *var,
void *var_ptr, const void *save)
{
ulong value= *((ulong *)save);
bool check_purge= false;
ulong UNINIT_VAR(prev_binlog_id);
mysql_mutex_lock(mysql_bin_log.get_log_lock());
if(mysql_bin_log.is_open())
{
prev_binlog_id= mysql_bin_log.current_binlog_id;
if (binlog_checksum_options != value)
mysql_bin_log.checksum_alg_reset= (enum_binlog_checksum_alg)value;
if (mysql_bin_log.rotate(true, &check_purge))
check_purge= false;
}
else
{
binlog_checksum_options= value;
}
DBUG_ASSERT(binlog_checksum_options == value);
mysql_bin_log.checksum_alg_reset= BINLOG_CHECKSUM_ALG_UNDEF;
mysql_mutex_unlock(mysql_bin_log.get_log_lock());
if (check_purge)
mysql_bin_log.checkpoint_and_purge(prev_binlog_id);
}
static int show_binlog_vars(THD *thd, SHOW_VAR *var, char *buff)
{
mysql_bin_log.set_status_variables(thd);
var->type= SHOW_ARRAY;
var->value= (char *)&binlog_status_vars_detail;
return 0;
}
static SHOW_VAR binlog_status_vars_top[]= {
{"Binlog", (char *) &show_binlog_vars, SHOW_FUNC},
{NullS, NullS, SHOW_LONG}
};
static MYSQL_SYSVAR_BOOL(
optimize_thread_scheduling,
opt_optimize_thread_scheduling,
PLUGIN_VAR_READONLY,
"Run fast part of group commit in a single thread, to optimize kernel "
"thread scheduling. On by default. Disable to run each transaction in group "
"commit in its own thread, which can be slower at very high concurrency. "
"This option is mostly for testing one algorithm versus the other, and it "
"should not normally be necessary to change it.",
NULL,
NULL,
1);
static MYSQL_SYSVAR_ENUM(
checksum,
binlog_checksum_options,
PLUGIN_VAR_RQCMDARG,
"Type of BINLOG_CHECKSUM_ALG. Include checksum for "
"log events in the binary log",
NULL,
binlog_checksum_update,
BINLOG_CHECKSUM_ALG_CRC32,
&binlog_checksum_typelib);
static struct st_mysql_sys_var *binlog_sys_vars[]=
{
MYSQL_SYSVAR(optimize_thread_scheduling),
MYSQL_SYSVAR(checksum),
NULL
};
/*
Copy out the non-directory part of binlog position filename for the
`binlog_snapshot_file' status variable, same way as it is done for
SHOW MASTER STATUS.
*/
static void
set_binlog_snapshot_file(const char *src)
{
int dir_len = dirname_length(src);
strmake_buf(binlog_snapshot_file, src + dir_len);
}
/*
Copy out current values of status variables, for SHOW STATUS or
information_schema.global_status.
This is called only under LOCK_show_status, so we can fill in a static array.
*/
void
TC_LOG_BINLOG::set_status_variables(THD *thd)
{
binlog_cache_mngr *cache_mngr;
if (thd && opt_bin_log)
cache_mngr= (binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
else
cache_mngr= 0;
bool have_snapshot= (cache_mngr && cache_mngr->last_commit_pos_file[0] != 0);
mysql_mutex_lock(&LOCK_commit_ordered);
binlog_status_var_num_commits= this->num_commits;
binlog_status_var_num_group_commits= this->num_group_commits;
if (!have_snapshot)
{
set_binlog_snapshot_file(last_commit_pos_file);
binlog_snapshot_position= last_commit_pos_offset;
}
mysql_mutex_unlock(&LOCK_commit_ordered);
mysql_mutex_lock(&LOCK_prepare_ordered);
binlog_status_group_commit_trigger_count= this->group_commit_trigger_count;
binlog_status_group_commit_trigger_timeout= this->group_commit_trigger_timeout;
binlog_status_group_commit_trigger_lock_wait= this->group_commit_trigger_lock_wait;
mysql_mutex_unlock(&LOCK_prepare_ordered);
if (have_snapshot)
{
set_binlog_snapshot_file(cache_mngr->last_commit_pos_file);
binlog_snapshot_position= cache_mngr->last_commit_pos_offset;
}
}
struct st_mysql_storage_engine binlog_storage_engine=
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
maria_declare_plugin(binlog)
{
MYSQL_STORAGE_ENGINE_PLUGIN,
&binlog_storage_engine,
"binlog",
"MySQL AB",
"This is a pseudo storage engine to represent the binlog in a transaction",
PLUGIN_LICENSE_GPL,
binlog_init, /* Plugin Init */
NULL, /* Plugin Deinit */
0x0100 /* 1.0 */,
binlog_status_vars_top, /* status variables */
binlog_sys_vars, /* system variables */
"1.0", /* string version */
MariaDB_PLUGIN_MATURITY_STABLE /* maturity */
}
maria_declare_plugin_end;
#ifdef WITH_WSREP
IO_CACHE * get_trans_log(THD * thd)
{
DBUG_ASSERT(binlog_hton->slot != HA_SLOT_UNDEF);
binlog_cache_mngr *cache_mngr = (binlog_cache_mngr*)
thd_get_ha_data(thd, binlog_hton);
if (cache_mngr)
return cache_mngr->get_binlog_cache_log(true);
WSREP_DEBUG("binlog cache not initialized, conn: %llu",
thd->thread_id);
return NULL;
}
bool wsrep_trans_cache_is_empty(THD *thd)
{
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
return (!cache_mngr || cache_mngr->trx_cache.empty());
}
void thd_binlog_trx_reset(THD * thd)
{
/*
todo: fix autocommit select to not call the caller
*/
if (thd_get_ha_data(thd, binlog_hton) != NULL)
{
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
if (cache_mngr)
{
cache_mngr->reset(false, true);
if (!cache_mngr->stmt_cache.empty())
{
WSREP_DEBUG("pending events in stmt cache, sql: %s", thd->query());
cache_mngr->stmt_cache.reset();
}
}
}
thd->clear_binlog_table_maps();
}
void thd_binlog_rollback_stmt(THD * thd)
{
WSREP_DEBUG("thd_binlog_rollback_stmt connection: %llu",
thd->thread_id);
binlog_cache_mngr *const cache_mngr=
(binlog_cache_mngr*) thd_get_ha_data(thd, binlog_hton);
if (cache_mngr)
cache_mngr->trx_cache.set_prev_position(MY_OFF_T_UNDEF);
}
#endif /* WITH_WSREP */
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