WL#912 (more user control on relay logs):

FLUSH LOGS now rotates relay logs,
and a new variable max_relay_log_size.
Plus a very small bit of code cleaning.


libmysqld/lib_sql.cc:
  open_log has no default arguments anymore.
mysql-test/r/rpl_flush_log_loop.result:
  result update now that FLUSH LOGS rotates relay logs.
mysql-test/r/rpl_log.result:
  result update now that FLUSH LOGS rotates relay logs.
mysql-test/r/rpl_rotate_logs.result:
  result update now that max_binlog_size is 4096.
mysql-test/t/rpl_rotate_logs-master.opt:
  now max_binlog_size must be a multiple of 4096 (see change in mysqld.cc)
sql/log.cc:
  Got rid of default arguments of various MYSQL_LOG methods (the default arguments
  made code reading uneasy).
  Set max_size in ::init().
  New function set_max_size() to set max_size of a MYSQL_LOG on-the-fly.
  More DBUG info.
sql/mysql_priv.h:
  no defaults in open_log().
  New variables max_relay_log_size.
sql/mysqld.cc:
  New variable and option max_relay_log_size.
  max_binlog_size and max_relay_log_size are multiples of IO_SIZE.
  No more default arguments for log functions.
sql/set_var.cc:
  New variable max_relay_log_size.
  If it is 0, then max_binlog_size will apply to relay logs.
  When one of these variables is changed, fix_max_%log_size is called
  to update max_size of the binary and/or relay logs.
sql/slave.cc:
  New function rotate_relay_log().
sql/slave.h:
  New function rotate_relay_log().
sql/sql_class.h:
  New member max_size of MYSQL_LOG (for automatic rotation).
  New method set_max_size() for setting on-the-fly.
sql/sql_parse.cc:
  Flush the relay log in FLUSH LOGS.

1 files changed, 4 insertions, 3 deletions

diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h
index 702db98748a..723df948e1d 100644
--- a/sql/mysql_priv.h
+++ b/sql/mysql_priv.h
@@ -606,8 +606,8 @@ bool fn_format_relative_to_data_home(my_string to, const char *name,
 bool open_log(MYSQL_LOG *log, const char *hostname,
 	      const char *opt_name, const char *extension,
 	      const char *index_file_name,
-	      enum_log_type type, bool read_append = 0,
-	      bool no_auto_events = 0);
+	      enum_log_type type, bool read_append,
+	      bool no_auto_events, ulong max_size);
 /* mysqld.cc */
 void clear_error_message(THD *thd);
 
@@ -654,7 +654,8 @@ extern ulong max_insert_delayed_threads, max_user_connections;
 extern ulong long_query_count, what_to_log,flush_time,opt_sql_mode;
 extern ulong query_buff_size, thread_stack,thread_stack_min;
 extern ulong binlog_cache_size, max_binlog_cache_size, open_files_limit;
-extern ulong max_binlog_size, rpl_recovery_rank, thread_cache_size;
+extern ulong max_binlog_size, max_relay_log_size;
+extern ulong rpl_recovery_rank, thread_cache_size;
 extern ulong com_stat[(uint) SQLCOM_END], com_other, back_log;
 extern ulong specialflag, current_pid;