You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
288 lines
9.3 KiB
288 lines
9.3 KiB
5 months ago
|
/* Copyright (c) 2006, 2019, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License, version 2.0,
|
||
|
|
as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
This program is also distributed with certain software (including
|
||
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
||
|
|
as designated in a particular file or component or in included license
|
||
|
|
documentation. The authors of MySQL hereby grant you an additional
|
||
|
|
permission to link the program and your derivative works with the
|
||
|
|
separately licensed software that they have included with MySQL.
|
||
|
|
|
||
|
|
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, version 2.0, for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
||
|
|
|
||
|
|
#include "sql/rpl_injector.h"
|
||
|
|
|
||
|
|
#include "my_compiler.h"
|
||
|
|
#include "mysql/service_mysql_alloc.h"
|
||
|
|
#include "sql/binlog.h" // mysql_bin_log
|
||
|
|
#include "sql/log_event.h" // Incident_log_event
|
||
|
|
#include "sql/mdl.h"
|
||
|
|
#include "sql/psi_memory_key.h"
|
||
|
|
#include "sql/sql_base.h" // close_thread_tables
|
||
|
|
#include "sql/sql_class.h" // THD
|
||
|
|
#include "sql/transaction.h" // trans_begin
|
||
|
|
|
||
|
|
/*
|
||
|
|
injector::transaction - member definitions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* inline since it's called below */
|
||
|
|
inline injector::transaction::transaction(MYSQL_BIN_LOG *log, THD *thd)
|
||
|
|
: m_state(START_STATE), m_thd(thd) {
|
||
|
|
/*
|
||
|
|
Default initialization of m_start_pos (which initializes it to garbage).
|
||
|
|
We need to fill it in using the code below.
|
||
|
|
*/
|
||
|
|
LOG_INFO log_info;
|
||
|
|
log->get_current_log(&log_info);
|
||
|
|
/* !!! binlog_pos does not follow RAII !!! */
|
||
|
|
m_start_pos.m_file_name =
|
||
|
|
my_strdup(key_memory_binlog_pos, log_info.log_file_name, MYF(0));
|
||
|
|
m_start_pos.m_file_pos = log_info.pos;
|
||
|
|
|
||
|
|
if (unlikely(m_start_pos.m_file_name == nullptr)) {
|
||
|
|
m_thd = nullptr;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Next pos is unknown until after commit of the Binlog transaction
|
||
|
|
*/
|
||
|
|
m_next_pos.m_file_name = 0;
|
||
|
|
m_next_pos.m_file_pos = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
Ensure we don't pick up this thd's last written Binlog pos in
|
||
|
|
empty-transaction-commit cases.
|
||
|
|
This is not ideal, as it zaps this information for any other
|
||
|
|
usage (e.g. WL4047)
|
||
|
|
Potential improvement : save the 'old' next pos prior to
|
||
|
|
commit, and restore on error.
|
||
|
|
*/
|
||
|
|
m_thd->clear_next_event_pos();
|
||
|
|
|
||
|
|
trans_begin(m_thd);
|
||
|
|
}
|
||
|
|
|
||
|
|
injector::transaction::~transaction() {
|
||
|
|
if (!good()) return;
|
||
|
|
|
||
|
|
/* Needed since my_free expects a 'char*' (instead of 'void*'). */
|
||
|
|
char *const start_pos_memory = const_cast<char *>(m_start_pos.m_file_name);
|
||
|
|
|
||
|
|
if (start_pos_memory) {
|
||
|
|
my_free(start_pos_memory);
|
||
|
|
}
|
||
|
|
|
||
|
|
char *const next_pos_memory = const_cast<char *>(m_next_pos.m_file_name);
|
||
|
|
if (next_pos_memory) {
|
||
|
|
my_free(next_pos_memory);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
@retval 0 transaction committed
|
||
|
|
@retval 1 transaction rolled back
|
||
|
|
*/
|
||
|
|
int injector::transaction::commit() {
|
||
|
|
DBUG_TRACE;
|
||
|
|
int error = m_thd->binlog_flush_pending_rows_event(true);
|
||
|
|
/*
|
||
|
|
Cluster replication does not preserve statement or
|
||
|
|
transaction boundaries of the master. Instead, a new
|
||
|
|
transaction on replication slave is started when a new GCI
|
||
|
|
(global checkpoint identifier) is issued, and is committed
|
||
|
|
when the last event of the check point has been received and
|
||
|
|
processed. This ensures consistency of each cluster in
|
||
|
|
cluster replication, and there is no requirement for stronger
|
||
|
|
consistency: MySQL replication is asynchronous with other
|
||
|
|
engines as well.
|
||
|
|
|
||
|
|
A practical consequence of that is that row level replication
|
||
|
|
stream passed through the injector thread never contains
|
||
|
|
COMMIT events.
|
||
|
|
Here we should preserve the server invariant that there is no
|
||
|
|
outstanding statement transaction when the normal transaction
|
||
|
|
is committed by committing the statement transaction
|
||
|
|
explicitly.
|
||
|
|
*/
|
||
|
|
trans_commit_stmt(m_thd);
|
||
|
|
if (!trans_commit(m_thd)) {
|
||
|
|
close_thread_tables(m_thd);
|
||
|
|
m_thd->mdl_context.release_transactional_locks();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Copy next position out into our next pos member */
|
||
|
|
if ((error == 0) && (m_thd->binlog_next_event_pos.file_name != nullptr) &&
|
||
|
|
((m_next_pos.m_file_name = my_strdup(
|
||
|
|
key_memory_binlog_pos, m_thd->binlog_next_event_pos.file_name,
|
||
|
|
MYF(0))) != nullptr)) {
|
||
|
|
m_next_pos.m_file_pos = m_thd->binlog_next_event_pos.pos;
|
||
|
|
} else {
|
||
|
|
/* Error, problem copying etc. */
|
||
|
|
m_next_pos.m_file_name = nullptr;
|
||
|
|
m_next_pos.m_file_pos = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::rollback() {
|
||
|
|
DBUG_TRACE;
|
||
|
|
trans_rollback_stmt(m_thd);
|
||
|
|
if (!trans_rollback(m_thd)) {
|
||
|
|
close_thread_tables(m_thd);
|
||
|
|
if (!m_thd->locked_tables_mode)
|
||
|
|
m_thd->mdl_context.release_transactional_locks();
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::use_table(server_id_type sid, table tbl) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
|
||
|
|
int error;
|
||
|
|
|
||
|
|
if ((error = check_state(TABLE_STATE))) return error;
|
||
|
|
|
||
|
|
server_id_type save_id = m_thd->server_id;
|
||
|
|
m_thd->set_server_id(sid);
|
||
|
|
error = m_thd->binlog_write_table_map(tbl.get_table(), tbl.is_transactional(),
|
||
|
|
false);
|
||
|
|
m_thd->set_server_id(save_id);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::write_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *cols, record_type record,
|
||
|
|
const unsigned char *extra_row_info) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
|
||
|
|
int error = check_state(ROW_STATE);
|
||
|
|
if (error) return error;
|
||
|
|
|
||
|
|
server_id_type save_id = m_thd->server_id;
|
||
|
|
m_thd->set_server_id(sid);
|
||
|
|
table::save_sets saveset(tbl, cols, cols);
|
||
|
|
|
||
|
|
error = m_thd->binlog_write_row(tbl.get_table(), tbl.is_transactional(),
|
||
|
|
record, extra_row_info);
|
||
|
|
m_thd->set_server_id(save_id);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::write_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *cols,
|
||
|
|
record_type record) {
|
||
|
|
return write_row(sid, tbl, cols, record, nullptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::delete_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *cols, record_type record,
|
||
|
|
const unsigned char *extra_row_info) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
|
||
|
|
int error = check_state(ROW_STATE);
|
||
|
|
if (error) return error;
|
||
|
|
|
||
|
|
server_id_type save_id = m_thd->server_id;
|
||
|
|
m_thd->set_server_id(sid);
|
||
|
|
table::save_sets saveset(tbl, cols, cols);
|
||
|
|
error = m_thd->binlog_delete_row(tbl.get_table(), tbl.is_transactional(),
|
||
|
|
record, extra_row_info);
|
||
|
|
m_thd->set_server_id(save_id);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::delete_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *cols,
|
||
|
|
record_type record) {
|
||
|
|
return delete_row(sid, tbl, cols, record, nullptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::update_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *before_cols,
|
||
|
|
MY_BITMAP const *after_cols,
|
||
|
|
record_type before, record_type after,
|
||
|
|
const unsigned char *extra_row_info) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
|
||
|
|
int error = check_state(ROW_STATE);
|
||
|
|
if (error) return error;
|
||
|
|
|
||
|
|
server_id_type save_id = m_thd->server_id;
|
||
|
|
m_thd->set_server_id(sid);
|
||
|
|
// The read- and write sets with autorestore (in the destructor)
|
||
|
|
table::save_sets saveset(tbl, before_cols, after_cols);
|
||
|
|
|
||
|
|
error = m_thd->binlog_update_row(tbl.get_table(), tbl.is_transactional(),
|
||
|
|
before, after, extra_row_info);
|
||
|
|
m_thd->set_server_id(save_id);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::transaction::update_row(server_id_type sid, table tbl,
|
||
|
|
MY_BITMAP const *cols, record_type before,
|
||
|
|
record_type after) {
|
||
|
|
return update_row(sid, tbl, cols, cols, before, after, nullptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
injector::transaction::binlog_pos injector::transaction::start_pos() const {
|
||
|
|
return m_start_pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
injector::transaction::binlog_pos injector::transaction::next_pos() const {
|
||
|
|
return m_next_pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
injector - member definitions
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* This constructor is called below */
|
||
|
|
inline injector::injector() {}
|
||
|
|
|
||
|
|
static injector *s_injector = nullptr;
|
||
|
|
injector *injector::instance() {
|
||
|
|
if (s_injector == 0) s_injector = new injector;
|
||
|
|
/* "There can be only one [instance]" */
|
||
|
|
return s_injector;
|
||
|
|
}
|
||
|
|
|
||
|
|
void injector::free_instance() {
|
||
|
|
injector *inj = s_injector;
|
||
|
|
|
||
|
|
if (inj != 0) {
|
||
|
|
s_injector = 0;
|
||
|
|
delete inj;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void injector::new_trans(THD *thd, injector::transaction *ptr) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
/*
|
||
|
|
Currently, there is no alternative to using 'mysql_bin_log' since that
|
||
|
|
is hardcoded into the way the handler is using the binary log.
|
||
|
|
*/
|
||
|
|
transaction trans(&mysql_bin_log, thd);
|
||
|
|
ptr->swap(trans);
|
||
|
|
}
|
||
|
|
|
||
|
|
int injector::record_incident(
|
||
|
|
THD *thd, binary_log::Incident_event::enum_incident incident,
|
||
|
|
LEX_CSTRING const message) {
|
||
|
|
Incident_log_event ev(thd, incident, message);
|
||
|
|
return mysql_bin_log.write_incident(&ev, thd, true /*need_lock_log=true*/,
|
||
|
|
message.str);
|
||
|
|
}
|