Merge 10.4 into 10.5

debian/mariadb-server-10.5.postinst

@@ -124,7 +124,7 @@ EOF
     if [ ! -d "$mysql_datadir"  ] && [ ! -L "$mysql_datadir" ]; then mkdir -Z "$mysql_datadir" ; fi
     if [ ! -d "$mysql_logdir"   ] && [ ! -L "$mysql_logdir"  ]; then mkdir -Z "$mysql_logdir"  ; fi
     # When creating an ext3 jounal on an already mounted filesystem like e.g.
-    # /var/lib/mysql, you get a .journal file that is not modifyable by chown.
+    # /var/lib/mysql, you get a .journal file that is not modifiable by chown.
     # The mysql_statedir must not be writable by the mysql user under any
     # circumstances as it contains scripts that are executed by root.
     set +e
@@ -161,7 +161,7 @@ EOF
     # Clean up old flags before setting new one
     rm -f $mysql_datadir/debian-*.flag
     # Flag data dir to avoid downgrades
-    touch "$mysql_datadir/debian-$MAJOR_VER.flag"
+    touch $mysql_datadir/debian-10.5.flag
 
     # initiate databases. Output is not allowed by debconf :-(
     # This will fail if we are upgrading an existing database; in this case
@@ -175,9 +175,6 @@ EOF
                                    $ERR_LOGGER
     set -e
 
-    # To avoid downgrades.
-    touch "$mysql_statedir/debian-$MAJOR_VER.flag"
-
     # On new installations root user can connect via unix_socket.
     # But on upgrades, scripts rely on debian-sys-maint user and
     # credentials in /etc/mysql/debian.cnf
@@ -251,7 +248,7 @@ EOF
   ;;
 esac
 
-db_stop # in case invoke failes
+db_stop # in case invoke fails
 
 # dh_systemd_start doesn't emit anything since we still ship /etc/init.d/mariadb.
 # Thus MariaDB server is started via init.d script, which in turn redirects to

extra/mariabackup/backup_mysql.cc

@@ -924,8 +924,6 @@ bool lock_tables(MYSQL *connection)
   }
 
   xb_mysql_query(connection, "BACKUP STAGE START", true);
-  // xb_mysql_query(connection, "BACKUP STAGE FLUSH", true);
-  // xb_mysql_query(connection, "BACKUP STAGE BLOCK_DDL", true);
   xb_mysql_query(connection, "BACKUP STAGE BLOCK_COMMIT", true);
   /* Set the maximum supported session value for
   lock_wait_timeout to prevent unnecessary timeouts when the

mysql-test/suite/innodb/r/innodb-alter-timestamp.result

@@ -139,3 +139,13 @@ ALTER TABLE t1 ADD f3 DATE NOT NULL, ALGORITHM=INPLACE;
 ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
 DROP TABLE t1;
 disconnect purge_control;
+#
+# MDEV-26458 SIGSEGV in innobase_table_is_empty() on ALTER TABLE
+#
+CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
+ALTER TABLE t DISCARD TABLESPACE;
+SET sql_mode='NO_ZERO_DATE';
+ALTER TABLE t ADD c DATE NOT NULL;
+SET sql_mode=DEFAULT;
+DROP TABLE t;
+# End of 10.3 tests

mysql-test/suite/innodb/t/innodb-alter-timestamp.test

@@ -103,3 +103,15 @@ INSERT INTO t1 VALUES (1, now());
 ALTER TABLE t1 ADD f3 DATE NOT NULL, ALGORITHM=INPLACE;
 DROP TABLE t1;
 disconnect purge_control;
+
+--echo #
+--echo # MDEV-26458 SIGSEGV in innobase_table_is_empty() on ALTER TABLE
+--echo #
+CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
+ALTER TABLE t DISCARD TABLESPACE;
+SET sql_mode='NO_ZERO_DATE';
+ALTER TABLE t ADD c DATE NOT NULL;
+SET sql_mode=DEFAULT;
+DROP TABLE t;
+
+--echo # End of 10.3 tests

sql/sql_view.cc

@@ -1,5 +1,5 @@
 /* Copyright (c) 2004, 2013, Oracle and/or its affiliates.
-   Copyright (c) 2011, 2016, MariaDB Corporation
+   Copyright (c) 2011, 2021, MariaDB Corporation.
 
    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

sql/table.h

@@ -1,7 +1,7 @@
 #ifndef TABLE_INCLUDED
 #define TABLE_INCLUDED
 /* Copyright (c) 2000, 2017, Oracle and/or its affiliates.
-   Copyright (c) 2009, 2020, MariaDB
+   Copyright (c) 2009, 2021, MariaDB
 
    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

storage/innobase/btr/btr0sea.cc

@@ -201,6 +201,8 @@ ATTRIBUTE_COLD static void btr_search_lazy_free(dict_index_t *index)
 {
   ut_ad(index->freed());
   dict_table_t *table= index->table;
+  table->autoinc_mutex.lock();
+
   /* Perform the skipped steps of dict_index_remove_from_cache_low(). */
   UT_LIST_REMOVE(table->freed_indexes, index);
   rw_lock_free(&index->lock);
@@ -209,9 +211,14 @@ ATTRIBUTE_COLD static void btr_search_lazy_free(dict_index_t *index)
   if (!UT_LIST_GET_LEN(table->freed_indexes) &&
       !UT_LIST_GET_LEN(table->indexes))
   {
-    ut_ad(table->id == 0);
+    ut_ad(!table->id);
+    table->autoinc_mutex.unlock();
+    table->autoinc_mutex.~mutex();
     dict_mem_table_free(table);
+    return;
   }
+
+  table->autoinc_mutex.unlock();
 }
 
 /** Disable the adaptive hash search system and empty the index. */

storage/innobase/dict/dict0dict.cc

@@ -1329,6 +1329,7 @@ dict_index_t *dict_index_t::clone_if_needed()
     return this;
   dict_index_t *prev= UT_LIST_GET_PREV(indexes, this);
 
+  table->autoinc_mutex.lock();
   UT_LIST_REMOVE(table->indexes, this);
   UT_LIST_ADD_LAST(table->freed_indexes, this);
   dict_index_t *index= clone();
@@ -1337,6 +1338,7 @@ dict_index_t *dict_index_t::clone_if_needed()
     UT_LIST_INSERT_AFTER(table->indexes, prev, index);
   else
     UT_LIST_ADD_FIRST(table->indexes, index);
+  table->autoinc_mutex.unlock();
   return index;
 }
 #endif /* BTR_CUR_HASH_ADAPT */
@@ -1979,26 +1981,32 @@ void dict_sys_t::remove(dict_table_t* table, bool lru, bool keep)
 		UT_DELETE(table->vc_templ);
 	}
 
-	table->autoinc_mutex.~mutex();
-
 	if (keep) {
+		table->autoinc_mutex.~mutex();
 		return;
 	}
 
 #ifdef BTR_CUR_HASH_ADAPT
-	if (UNIV_UNLIKELY(UT_LIST_GET_LEN(table->freed_indexes) != 0)) {
-		if (table->fts) {
-			fts_optimize_remove_table(table);
-			fts_free(table);
-			table->fts = NULL;
-		}
+	if (table->fts) {
+		fts_optimize_remove_table(table);
+		fts_free(table);
+		table->fts = NULL;
+	}
 
-		table->vc_templ = NULL;
-		table->id = 0;
+	table->autoinc_mutex.lock();
+
+	ulint freed = UT_LIST_GET_LEN(table->freed_indexes);
+
+	table->vc_templ = NULL;
+	table->id = 0;
+	table->autoinc_mutex.unlock();
+
+	if (UNIV_UNLIKELY(freed != 0)) {
 		return;
 	}
 #endif /* BTR_CUR_HASH_ADAPT */
 
+	table->autoinc_mutex.~mutex();
 	dict_mem_table_free(table);
 }
 
@@ -2217,8 +2225,10 @@ dict_index_remove_from_cache_low(
 	zero. See also: dict_table_can_be_evicted() */
 
 	if (index->n_ahi_pages()) {
+		table->autoinc_mutex.lock();
 		index->set_freed();
 		UT_LIST_ADD_LAST(table->freed_indexes, index);
+		table->autoinc_mutex.unlock();
 		return;
 	}
 #endif /* BTR_CUR_HASH_ADAPT */

storage/innobase/handler/handler0alter.cc

@@ -2192,6 +2192,7 @@ ha_innobase::check_if_supported_inplace_alter(
 	/* '0000-00-00' value isn't allowed for datetime datatype
 	for newly added column when table is not empty */
 	if (ha_alter_info->error_if_not_empty
+	    && m_prebuilt->table->space
 	    && !innobase_table_is_empty(m_prebuilt->table)) {
 		DBUG_RETURN(HA_ALTER_INPLACE_NOT_SUPPORTED);
 	}