Method remove_logs_from_index

phx_percona/percona/sql/binlog.cc:4319–4358

Remove logs from index file. - To make crash safe, we copy the content of index file from index_file_start_offset recored in log_info to crash safe index file firstly and then move the crash safe index file to index file. @param linfo Store here the found log file name and position to the NEXT log file name in

    LOG_INFO_IO    Got IO error while reading/writing file
*/
int MYSQL_BIN_LOG::remove_logs_from_index(LOG_INFO* log_info, bool need_update_threads)
{
  if (open_crash_safe_index_file())
  {
    sql_print_error("MYSQL_BIN_LOG::remove_logs_from_index failed to "
                    "open the crash safe index file.");
    goto err;
  }

  if (copy_file(&index_file, &crash_safe_index_file,
                log_info->index_file_start_offset))
  {
    sql_print_error("MYSQL_BIN_LOG::remove_logs_from_index failed to "
                    "copy index file to crash safe index file.");
    goto err;
  }

  if (close_crash_safe_index_file())
  {
    sql_print_error("MYSQL_BIN_LOG::remove_logs_from_index failed to "
                    "close the crash safe index file.");
    goto err;
  }
  DBUG_EXECUTE_IF("fault_injection_copy_part_file", DBUG_SUICIDE(););

  if (move_crash_safe_index_file_to_index_file(false/*need_lock_index=false*/))
  {
    sql_print_error("MYSQL_BIN_LOG::remove_logs_from_index failed to "
                    "move crash safe index file to index file.");
    goto err;
  }

  // now update offsets in index file for running threads
  if (need_update_threads)
    adjust_linfo_offsets(log_info->index_file_start_offset);
  return 0;

err:
  return LOG_INFO_IO;
}

/**
  Remove all logs before the given log from disk and from the index file.