Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 345 insertions, 0 deletions

diff --git a/sql/wsrep_client_service.cc b/sql/wsrep_client_service.cc
new file mode 100644
index 00000000..3eb457a0
--- /dev/null
+++ b/sql/wsrep_client_service.cc
@@ -0,0 +1,345 @@
+/* Copyright 2018 Codership Oy <info@codership.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+#include "wsrep_client_service.h"
+#include "wsrep_high_priority_service.h"
+#include "wsrep_binlog.h"  /* wsrep_dump_rbr_buf() */
+#include "wsrep_schema.h"  /* remove_fragments() */
+#include "wsrep_thd.h"
+#include "wsrep_xid.h"
+#include "wsrep_trans_observer.h"
+
+#include "sql_base.h"    /* close_temporary_table() */
+#include "sql_class.h"   /* THD */
+#include "sql_parse.h"   /* stmt_causes_implicit_commit() */
+#include "rpl_filter.h"  /* binlog_filter */
+#include "rpl_rli.h"     /* Relay_log_info */
+#include "slave.h"   /* opt_log_slave_updates */
+#include "transaction.h" /* trans_commit()... */
+#include "log.h"      /* stmt_has_updated_trans_table() */
+#include "mysql/service_debug_sync.h"
+#include "mysql/psi/mysql_thread.h" /* mysql_mutex_assert_owner() */
+
+namespace
+{
+
+void debug_sync_caller(THD* thd, const char* sync_point)
+{
+#ifdef ENABLED_DEBUG_SYNC_OUT
+  debug_sync_set_action(thd, sync_point, strlen(sync_point));
+#endif
+#ifdef ENABLED_DEBUG_SYNC
+  if (debug_sync_service) debug_sync_service(thd,sync_point,strlen(sync_point));
+#endif
+
+}
+}
+
+Wsrep_client_service::Wsrep_client_service(THD* thd,
+                                           Wsrep_client_state& client_state)
+  : wsrep::client_service()
+  , m_thd(thd)
+  , m_client_state(client_state)
+{ }
+
+void Wsrep_client_service::store_globals()
+{
+  wsrep_store_threadvars(m_thd);
+}
+
+void Wsrep_client_service::reset_globals()
+{
+  wsrep_reset_threadvars(m_thd);
+}
+
+bool Wsrep_client_service::interrupted(
+  wsrep::unique_lock<wsrep::mutex>& lock WSREP_UNUSED) const
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  mysql_mutex_assert_owner(static_cast<mysql_mutex_t*>(lock.mutex()->native()));
+  bool ret= (m_thd->killed != NOT_KILLED);
+  if (ret)
+  {
+    WSREP_DEBUG("wsrep state is interrupted, THD::killed %d trx state %d",
+                m_thd->killed,  m_thd->wsrep_trx().state());
+  }
+  return ret;
+}
+
+int Wsrep_client_service::prepare_data_for_replication()
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  DBUG_ENTER("Wsrep_client_service::prepare_data_for_replication");
+  size_t data_len= 0;
+  IO_CACHE* cache= wsrep_get_trans_cache(m_thd);
+
+  if (cache)
+  {
+    m_thd->binlog_flush_pending_rows_event(true);
+    if (wsrep_write_cache(m_thd, cache, &data_len))
+    {
+      WSREP_ERROR("rbr write fail, data_len: %zu",
+                  data_len);
+      // wsrep_override_error(m_thd, ER_ERROR_DURING_COMMIT);
+      DBUG_RETURN(1);
+    }
+  }
+
+  if (data_len == 0)
+  {
+    if (m_thd->get_stmt_da()->is_ok()              &&
+        m_thd->get_stmt_da()->affected_rows() > 0  &&
+        !binlog_filter->is_on() &&
+        !m_thd->wsrep_trx().is_streaming())
+    {
+      WSREP_DEBUG("empty rbr buffer, query: %s, "
+                  "affected rows: %llu, "
+                  "changed tables: %d, "
+                  "sql_log_bin: %d",
+                  WSREP_QUERY(m_thd),
+                  m_thd->get_stmt_da()->affected_rows(),
+                  stmt_has_updated_trans_table(m_thd),
+                  m_thd->variables.sql_log_bin);
+    }
+    else
+    {
+      WSREP_DEBUG("empty rbr buffer, query: %s", WSREP_QUERY(m_thd));
+    }
+  }
+  DBUG_RETURN(0);
+}
+
+
+void Wsrep_client_service::cleanup_transaction()
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  if (WSREP_EMULATE_BINLOG(m_thd)) wsrep_thd_binlog_trx_reset(m_thd);
+  m_thd->wsrep_affected_rows= 0;
+}
+
+
+int Wsrep_client_service::prepare_fragment_for_replication(
+  wsrep::mutable_buffer& buffer, size_t& log_position)
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  THD* thd= m_thd;
+  DBUG_ENTER("Wsrep_client_service::prepare_fragment_for_replication");
+  IO_CACHE* cache= wsrep_get_trans_cache(thd);
+  thd->binlog_flush_pending_rows_event(true);
+
+  if (!cache)
+  {
+    DBUG_RETURN(0);
+  }
+
+  const my_off_t saved_pos(my_b_tell(cache));
+  if (reinit_io_cache(cache, READ_CACHE, thd->wsrep_sr().log_position(), 0, 0))
+  {
+    DBUG_RETURN(1);
+  }
+
+  int ret= 0;
+  size_t total_length= 0;
+  size_t length= my_b_bytes_in_cache(cache);
+
+  if (!length)
+  {
+    length= my_b_fill(cache);
+  }
+
+  if (length > 0)
+  {
+    do
+    {
+      total_length+= length;
+      if (total_length > wsrep_max_ws_size)
+      {
+        WSREP_WARN("transaction size limit (%lu) exceeded: %zu",
+                   wsrep_max_ws_size, total_length);
+        ret= 1;
+        goto cleanup;
+      }
+
+      buffer.push_back(reinterpret_cast<const char*>(cache->read_pos),
+                       reinterpret_cast<const char*>(cache->read_pos + length));
+      cache->read_pos= cache->read_end;
+    }
+    while (cache->file >= 0 && (length= my_b_fill(cache)));
+  }
+  DBUG_ASSERT(total_length == buffer.size());
+  log_position= saved_pos;
+cleanup:
+  if (reinit_io_cache(cache, WRITE_CACHE, saved_pos, 0, 0))
+  {
+    WSREP_WARN("Failed to reinitialize IO cache");
+    ret= 1;
+  }
+  DBUG_RETURN(ret);
+}
+
+int Wsrep_client_service::remove_fragments()
+{
+  DBUG_ENTER("Wsrep_client_service::remove_fragments");
+  if (wsrep_schema->remove_fragments(m_thd,
+                                     Wsrep_server_state::instance().id(),
+                                     m_thd->wsrep_trx().id(),
+                                     m_thd->wsrep_sr().fragments()))
+  {
+    WSREP_DEBUG("Failed to remove fragments from SR storage for transaction "
+                "%llu, %llu",
+                m_thd->thread_id, m_thd->wsrep_trx().id().get());
+    DBUG_RETURN(1);
+  }
+  DBUG_RETURN(0);
+}
+
+bool Wsrep_client_service::statement_allowed_for_streaming() const
+{
+  /*
+    Todo: Decide if implicit commit is allowed with streaming
+    replication.
+    !stmt_causes_implicit_commit(m_thd, CF_IMPLICIT_COMMIT_BEGIN);
+  */
+  return true;
+}
+
+size_t Wsrep_client_service::bytes_generated() const
+{
+  IO_CACHE* cache= wsrep_get_trans_cache(m_thd);
+  if (cache)
+  {
+    size_t pending_rows_event_length= 0;
+    if (Rows_log_event* ev= m_thd->binlog_get_pending_rows_event(true))
+    {
+      pending_rows_event_length= ev->get_data_size();
+    }
+    return my_b_tell(cache) + pending_rows_event_length;
+  }
+  return 0;
+}
+
+void Wsrep_client_service::will_replay()
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  mysql_mutex_lock(&LOCK_wsrep_replaying);
+  ++wsrep_replaying;
+  mysql_mutex_unlock(&LOCK_wsrep_replaying);
+}
+
+void Wsrep_client_service::signal_replayed()
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  mysql_mutex_lock(&LOCK_wsrep_replaying);
+  --wsrep_replaying;
+  DBUG_ASSERT(wsrep_replaying >= 0);
+  mysql_cond_broadcast(&COND_wsrep_replaying);
+  mysql_mutex_unlock(&LOCK_wsrep_replaying);
+}
+
+enum wsrep::provider::status Wsrep_client_service::replay()
+{
+
+  DBUG_ASSERT(m_thd == current_thd);
+  DBUG_ENTER("Wsrep_client_service::replay");
+
+  /*
+    Allocate separate THD for replaying to avoid tampering
+    original THD state during replication event applying.
+   */
+  THD *replayer_thd= new THD(true, true);
+  replayer_thd->thread_stack= m_thd->thread_stack;
+  replayer_thd->real_id= pthread_self();
+  replayer_thd->prior_thr_create_utime=
+      replayer_thd->start_utime= microsecond_interval_timer();
+  replayer_thd->set_command(COM_SLEEP);
+  replayer_thd->reset_for_next_command(true);
+
+  enum wsrep::provider::status ret;
+  {
+    Wsrep_replayer_service replayer_service(replayer_thd, m_thd);
+    wsrep::provider& provider(replayer_thd->wsrep_cs().provider());
+    ret= provider.replay(replayer_thd->wsrep_trx().ws_handle(),
+                         &replayer_service);
+    replayer_service.replay_status(ret);
+  }
+
+  delete replayer_thd;
+  DBUG_RETURN(ret);
+}
+
+enum wsrep::provider::status Wsrep_client_service::replay_unordered()
+{
+  DBUG_ASSERT(0);
+  return wsrep::provider::error_not_implemented;
+}
+
+void Wsrep_client_service::wait_for_replayers(wsrep::unique_lock<wsrep::mutex>& lock)
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  lock.unlock();
+  mysql_mutex_lock(&LOCK_wsrep_replaying);
+  /* We need to check if the THD is BF aborted during condition wait.
+     Because the aborter does not know which condition this thread is waiting,
+     use timed wait and check if the THD is BF aborted in the loop. */
+  while (wsrep_replaying > 0 && !wsrep_is_bf_aborted(m_thd))
+  {
+    struct timespec wait_time;
+    set_timespec_nsec(wait_time, 10000000L);
+    mysql_cond_timedwait(&COND_wsrep_replaying, &LOCK_wsrep_replaying,
+                         &wait_time);
+  }
+  mysql_mutex_unlock(&LOCK_wsrep_replaying);
+  lock.lock();
+}
+
+enum wsrep::provider::status Wsrep_client_service::commit_by_xid()
+{
+  DBUG_ASSERT(0);
+  return wsrep::provider::error_not_implemented;
+}
+
+void Wsrep_client_service::debug_sync(const char* sync_point)
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  debug_sync_caller(m_thd, sync_point);
+}
+
+void Wsrep_client_service::debug_crash(const char* crash_point)
+{
+  // DBUG_ASSERT(m_thd == current_thd);
+  DBUG_EXECUTE_IF(crash_point, DBUG_SUICIDE(); );
+}
+
+int Wsrep_client_service::bf_rollback()
+{
+  DBUG_ASSERT(m_thd == current_thd);
+  DBUG_ENTER("Wsrep_client_service::rollback");
+
+  int ret= (trans_rollback_stmt(m_thd) || trans_rollback(m_thd));
+  if (m_thd->locked_tables_mode && m_thd->lock)
+  {
+    if (m_thd->locked_tables_list.unlock_locked_tables(m_thd))
+      ret= 1;
+    m_thd->variables.option_bits&= ~OPTION_TABLE_LOCK;
+  }
+  if (m_thd->global_read_lock.is_acquired())
+  {
+    m_thd->global_read_lock.unlock_global_read_lock(m_thd);
+  }
+  m_thd->release_transactional_locks();
+  m_thd->mdl_context.release_explicit_locks();
+
+  DBUG_RETURN(ret);
+}