Better fix for myisamchk --sort-index on windows

Fixed deadlock bug when doing resize of key buffer while key buffer was in active use


myisam/mi_locking.c:
  Better fix for myisamchk --sort-index on windows
mysql-test/r/symlink.result:
  Update results
mysql-test/t/symlink.test:
  Update results
mysys/mf_keycache.c:
  Fixed deadlock bug when doing resize of key buffer while key buffer was in active use
sql/ha_myisam.cc:
  simple optimization
sql/sql_show.cc:
  Fixed theoretical buffer overrun
  Reset variable properly before calling update_create_info()

myisam/mi_locking.c

@@ -57,10 +57,8 @@ int mi_lock_database(MI_INFO *info, int lock_type)
       DBUG_PRINT("info", ("old lock: %d", info->lock_type));
       if (info->lock_type == F_RDLCK)
 	count= --share->r_locks;
-      else if (info->lock_type == F_WRLCK)
-	count= --share->w_locks;
       else
-	count= 1;				/* F_EXTRA_LCK */
+	count= --share->w_locks;
       --share->tot_locks;
       if (info->lock_type == F_WRLCK && !share->w_locks &&
 	  !share->delay_key_write && flush_key_blocks(share->kfile,FLUSH_KEEP))
@@ -110,6 +108,8 @@ int mi_lock_database(MI_INFO *info, int lock_type)
 	  if (error)
 	    mi_mark_crashed(info);
 	}
+	if (info->lock_type != F_EXTRA_LCK)
+	{
 	  if (share->r_locks)
 	  {					/* Only read locks left */
 	    flag=1;
@@ -125,6 +125,7 @@ int mi_lock_database(MI_INFO *info, int lock_type)
 	      error=my_errno;
 	  }
 	}
+      }
       info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED);
       info->lock_type= F_UNLCK;
       break;

mysql-test/r/symlink.result

@@ -40,7 +40,7 @@ t9	CREATE TABLE `t9` (
   `b` char(16) NOT NULL default '',
   `c` int(11) NOT NULL default '0',
   PRIMARY KEY  (`a`)
-) TYPE=MyISAM
+) TYPE=MyISAM DATA DIRECTORY='TEST_DIR/var/tmp/' INDEX DIRECTORY='TEST_DIR/var/run/'
 alter table t9 rename t8, add column d int not null;
 alter table t8 rename t7;
 rename table t7 to t9;
@@ -62,5 +62,5 @@ t9	CREATE TABLE `t9` (
   `c` int(11) NOT NULL default '0',
   `d` int(11) NOT NULL default '0',
   PRIMARY KEY  (`a`)
-) TYPE=MyISAM
+) TYPE=MyISAM DATA DIRECTORY='TEST_DIR/var/tmp/' INDEX DIRECTORY='TEST_DIR/var/run/'
 drop database mysqltest;

mysql-test/t/symlink.test

@@ -46,6 +46,7 @@ check table t9;
 optimize table t9;
 repair table t9;
 alter table t9 add column c int not null;
+--replace_result $MYSQL_TEST_DIR TEST_DIR
 show create table t9;
 
 # Test renames
@@ -86,5 +87,6 @@ enable_query_log;
 
 alter table t9 rename mysqltest.t9;
 select count(*) from mysqltest.t9;
+--replace_result $MYSQL_TEST_DIR TEST_DIR
 show create table mysqltest.t9;
 drop database mysqltest;

mysys/mf_keycache.c

@@ -705,11 +705,19 @@ int flush_key_blocks(File file, enum flush_type type)
 
 static int flush_all_key_blocks()
 {
-  int error=0;
-  while (_my_blocks_changed > 0)
-    if (flush_key_blocks_int(_my_used_first->file, FLUSH_RELEASE))
-      error=1;
-  return error;
+  SEC_LINK **block, **end;
+  for (block= changed_blocks, end= block+CHANGED_BLOCKS_HASH;
+       block < end;
+       block++
+       )
+  {
+    while (*block)
+    {
+      if (flush_key_blocks_int((*block)->file, FLUSH_RELEASE))
+	return 1;
+    }
+  }
+  return 0;
 }
 
 

sql/ha_myisam.cc

@@ -1018,7 +1018,7 @@ THR_LOCK_DATA **ha_myisam::store_lock(THD *thd,
 
 void ha_myisam::update_create_info(HA_CREATE_INFO *create_info)
 {
-  table->file->info(HA_STATUS_AUTO | HA_STATUS_CONST);
+  ha_myisam::info(HA_STATUS_AUTO | HA_STATUS_CONST);
   if (!(create_info->used_fields & HA_CREATE_USED_AUTO))
   {
     create_info->auto_increment_value=auto_increment_value;

sql/sql_show.cc

@@ -903,6 +903,7 @@ store_create_info(THD *thd, TABLE *table, String *packet)
 
   key_info= table->key_info;
   file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK | HA_STATUS_TIME);
+  bzero((char*) &create_info, sizeof(create_info));
   file->update_create_info(&create_info);
   primary_key= table->primary_key;
 
@@ -1005,10 +1006,12 @@ store_create_info(THD *thd, TABLE *table, String *packet)
   }
   if (file->raid_type)
   {
-    sprintf(buff," RAID_TYPE=%s RAID_CHUNKS=%d RAID_CHUNKSIZE=%ld",
+    uint length;
+    length= my_snprintf(buff,sizeof(buff),
+			" RAID_TYPE=%s RAID_CHUNKS=%d RAID_CHUNKSIZE=%ld",
 			my_raid_type(file->raid_type), file->raid_chunks,
 			file->raid_chunksize/RAID_BLOCK_SIZE);
-    packet->append(buff);
+    packet->append(buff, length);
   }
   append_directory(thd, packet, "DATA",  create_info.data_file_name);
   append_directory(thd, packet, "INDEX", create_info.index_file_name);