Backporting WL#4398 WL#1720

Backporting BUG#44058 BUG#42244 BUG#45672 BUG#45673
Backporting BUG#45819 BUG#45973 BUG#39012

1 files changed, 122 insertions, 0 deletions

diff --git a/plugin/semisync/semisync_slave.cc b/plugin/semisync/semisync_slave.cc
new file mode 100644
index 00000000000..f6bbb17ce9d
--- /dev/null
+++ b/plugin/semisync/semisync_slave.cc
@@ -0,0 +1,122 @@
+/* Copyright (C) 2008 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+
+#include "semisync_slave.h"
+
+char rpl_semi_sync_slave_enabled;
+unsigned long rpl_semi_sync_slave_status= 0;
+unsigned long rpl_semi_sync_slave_trace_level;
+
+int ReplSemiSyncSlave::initObject()
+{
+  int result= 0;
+  const char *kWho = "ReplSemiSyncSlave::initObject";
+
+  if (init_done_)
+  {
+    fprintf(stderr, "%s called twice\n", kWho);
+    return 1;
+  }
+  init_done_ = true;
+
+  /* References to the parameter works after set_options(). */
+  setSlaveEnabled(rpl_semi_sync_slave_enabled);
+  setTraceLevel(rpl_semi_sync_slave_trace_level);
+
+  return result;
+}
+
+int ReplSemiSyncSlave::slaveReplyConnect()
+{
+  if (!mysql_reply && !(mysql_reply= rpl_connect_master(NULL)))
+  {
+    sql_print_error("Semisync slave connect to master for reply failed");
+    return 1;
+  }
+  return 0;
+}
+
+int ReplSemiSyncSlave::slaveReadSyncHeader(const char *header,
+                                      unsigned long total_len,
+                                      bool  *need_reply,
+                                      const char **payload,
+                                      unsigned long *payload_len)
+{
+  const char *kWho = "ReplSemiSyncSlave::slaveReadSyncHeader";
+  int read_res = 0;
+  function_enter(kWho);
+
+  if ((unsigned char)(header[0]) == kPacketMagicNum)
+  {
+    *need_reply  = (header[1] & kPacketFlagSync);
+    *payload_len = total_len - 2;
+    *payload     = header + 2;
+
+    if (trace_level_ & kTraceDetail)
+      sql_print_information("%s: reply - %d", kWho, *need_reply);
+  }
+  else
+  {
+    sql_print_error("Missing magic number for semi-sync packet, packet "
+                    "len: %lu", total_len);
+    read_res = -1;
+  }
+
+  return function_exit(kWho, read_res);
+}
+
+int ReplSemiSyncSlave::slaveStart(Binlog_relay_IO_param *param)
+{
+  bool semi_sync= getSlaveEnabled();
+  
+  sql_print_information("Slave I/O thread: Start %s replication to\
+ master '%s@%s:%d' in log '%s' at position %lu",
+			semi_sync ? "semi-sync" : "asynchronous",
+			param->user, param->host, param->port,
+			param->master_log_name[0] ? param->master_log_name : "FIRST",
+			(unsigned long)param->master_log_pos);
+
+  if (semi_sync && !rpl_semi_sync_slave_status)
+    rpl_semi_sync_slave_status= 1;
+  return 0;
+}
+
+int ReplSemiSyncSlave::slaveStop(Binlog_relay_IO_param *param)
+{
+  if (rpl_semi_sync_slave_status)
+    rpl_semi_sync_slave_status= 0;
+  if (mysql_reply)
+    mysql_close(mysql_reply);
+  mysql_reply= 0;
+  return 0;
+}
+
+int ReplSemiSyncSlave::slaveReply(const char *log_name, my_off_t log_pos)
+{
+  char query[FN_REFLEN + 100];
+  sprintf(query, "SET SESSION rpl_semi_sync_master_reply_log_file_pos='%llu:%s'",
+          (unsigned long long)log_pos, log_name);
+  if (mysql_real_query(mysql_reply, query, strlen(query)))
+  {
+    sql_print_error("Set 'rpl_semi_sync_master_reply_log_file_pos' on master failed");
+    mysql_free_result(mysql_store_result(mysql_reply));
+    mysql_close(mysql_reply);
+    mysql_reply= 0;
+    return 1;
+  }
+  mysql_free_result(mysql_store_result(mysql_reply));
+  return 0;
+}