a4a7e806d0
Doing the checksum matching after memory is allocated and all the work is done is not very efficient. A simpler solution is to always replace the users when we reload them. Replacing the users every time the service users are reloaded will not cause a degradation in performance because the previous implementation already does all the extra work but then just discards it. A faster solution would be to first query the server and request some sort of a checksum based on the result set the users query would create. Currently, this can be done inside a stored procedure but it is not very convenient for the average user. Another option would be to generate a long string with GROUP_CONCAT but it is highly likely that some internal buffer limit is hit before the complete value is calculated.
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
#pragma once
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#ifndef _MAXSCALE_DBUSERS_H
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#define _MAXSCALE_DBUSERS_H
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file dbusers.h Extarct user information form the backend database
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 25/06/13 Mark Riddoch Initial implementation
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* 25/02/13 Massimiliano Pinto Added users table refresh rate default values
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* 28/02/14 Massimiliano Pinto Added MySQL user and host data structure
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* 03/10/14 Massimiliano Pinto Added netmask to MySQL user and host data structure
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* 13/10/14 Massimiliano Pinto Added resource to MySQL user and host data structure
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*
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <maxscale/service.h>
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#include <maxscale/protocol/mysql.h>
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#include <arpa/inet.h>
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MXS_BEGIN_DECLS
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/** Cache directory and file names */
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static const char DBUSERS_DIR[] = "cache";
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static const char DBUSERS_FILE[] = "dbusers";
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/**
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* MySQL user and host data structure
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*/
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typedef struct mysql_user_host_key
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{
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char *user;
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struct sockaddr_in ipv4;
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int netmask;
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char *resource;
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char hostname[MYSQL_HOST_MAXLEN + 1];
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} MYSQL_USER_HOST;
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extern int add_mysql_users_with_host_ipv4(USERS *users, const char *user, const char *host,
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char *passwd, const char *anydb, const char *db);
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extern bool check_service_permissions(SERVICE* service);
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extern int dbusers_load(USERS *, const char *filename);
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extern int dbusers_save(USERS *, const char *filename);
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extern int mysql_users_add(USERS *users, MYSQL_USER_HOST *key, char *auth);
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extern USERS *mysql_users_alloc();
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extern char *mysql_users_fetch(USERS *users, MYSQL_USER_HOST *key);
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extern int replace_mysql_users(SERV_LISTENER *listener);
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MXS_END_DECLS
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#endif
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