BUG#37148 Most callers of mysql_bin_log.write ignore the return result

This is the non-ndb part of the patch.

The return value of mysql_bin_log.write was ignored by most callers,
which may lead to inconsistent on master and slave if the transaction
was committed while the binlog was not correctly written. If
my_error() is call in mysql_bin_log.write, this could also lead to
assertion issue if my_ok() or my_error() is called after.

This fixed the problem by let the caller to check and handle the
return value of mysql_bin_log.write. This patch only adresses the
simple cases.

1 files changed, 8 insertions, 5 deletions

diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc
index 4e5ce08ab5d..346915435c9 100644
--- a/sql/sql_repl.cc
+++ b/sql/sql_repl.cc
@@ -1219,8 +1219,8 @@ int reset_slave(THD *thd, Master_info* mi)
   MY_STAT stat_area;
   char fname[FN_REFLEN];
   int thread_mask= 0, error= 0;
-  uint sql_errno=0;
-  const char* errmsg=0;
+  uint sql_errno=ER_UNKNOWN_ERROR;
+  const char* errmsg= "Unknown error occured while reseting slave";
   DBUG_ENTER("reset_slave");
 
   lock_slave_threads(mi);
@@ -1960,7 +1960,8 @@ err:
    replication events along LOAD DATA processing.
    
    @param file  pointer to io-cache
-   @return 0
+   @retval 0 success
+   @retval 1 failure
 */
 int log_loaded_block(IO_CACHE* file)
 {
@@ -1987,7 +1988,8 @@ int log_loaded_block(IO_CACHE* file)
       Append_block_log_event a(lf_info->thd, lf_info->thd->db, buffer,
                                min(block_len, max_event_size),
                                lf_info->log_delayed);
-      mysql_bin_log.write(&a);
+      if (mysql_bin_log.write(&a))
+        DBUG_RETURN(1);
     }
     else
     {
@@ -1995,7 +1997,8 @@ int log_loaded_block(IO_CACHE* file)
                                    buffer,
                                    min(block_len, max_event_size),
                                    lf_info->log_delayed);
-      mysql_bin_log.write(&b);
+      if (mysql_bin_log.write(&b))
+        DBUG_RETURN(1);
       lf_info->wrote_create_file= 1;
       DBUG_SYNC_POINT("debug_lock.created_file_event",10);
     }