branches/5.1:

Fix Bug#11894 innodb_file_per_table crashes w/ Windows .sym symbolic
link hack

The crash was due to un-handled error 3 (path not found). In the case
of file per table, change the call to os_file_handle_error_no_exit()
from os_file_handle_error(). Also, checks for full path pattern during
table create (Windows only), which is used in symbolic link and temp
table creation.

Approved by:	Heikki

handler/ha_innodb.cc

@@ -4989,6 +4989,29 @@ ha_innobase::create(
 	DBUG_ENTER("ha_innobase::create");
 
 	DBUG_ASSERT(thd != NULL);
+	DBUG_ASSERT(create_info != NULL);
+
+#ifdef __WIN__
+	/* Names passed in from server are in two formats:
+	1. <database_name>/<table_name>: for normal table creation
+	2. full path: for temp table creation, or sym link
+
+	When srv_file_per_table is on, check for full path pattern, i.e.
+	X:\dir\...,		X is a driver letter, or
+	\\dir1\dir2\...,	UNC path
+	returns error if it is in full path format, but not creating a temp.
+	table. Currently InnoDB does not support symbolic link on Windows. */
+
+	if (srv_file_per_table
+	    && (!create_info->options & HA_LEX_CREATE_TMP_TABLE)) {
+
+		if ((name[1] == ':')
+		    || (name[0] == '\\' && name[1] == '\\')) {
+			sql_print_error("Cannot create table %s\n", name);
+			DBUG_RETURN(HA_ERR_GENERIC);
+		}
+	}
+#endif
 
 	if (form->s->fields > 1000) {
 		/* The limit probably should be REC_MAX_N_FIELDS - 3 = 1020,

os/os0file.c

@@ -1267,9 +1267,19 @@ try_again:
 	if (file == INVALID_HANDLE_VALUE) {
 		*success = FALSE;
 
+		/* When srv_file_per_table is on, file creation failure may not
+		be critical to the whole instance. Do not crash the server in
+		case of unknown errors. */
+		if (srv_file_per_table) {
+			retry = os_file_handle_error_no_exit(name,
+						create_mode == OS_FILE_CREATE ?
+						"create" : "open");
+		} else {
 			retry = os_file_handle_error(name,
 						create_mode == OS_FILE_CREATE ?
 						"create" : "open");
+		}
+
 		if (retry) {
 			goto try_again;
 		}
@@ -1344,9 +1354,19 @@ try_again:
 	if (file == -1) {
 		*success = FALSE;
 
+		/* When srv_file_per_table is on, file creation failure may not
+		be critical to the whole instance. Do not crash the server in
+		case of unknown errors. */
+		if (srv_file_per_table) {
+			retry = os_file_handle_error_no_exit(name,
+						create_mode == OS_FILE_CREATE ?
+						"create" : "open");
+		} else {
 			retry = os_file_handle_error(name,
 						create_mode == OS_FILE_CREATE ?
 						"create" : "open");
+		}
+
 		if (retry) {
 			goto try_again;
 		} else {