129 lines
5.3 KiB
C++
129 lines
5.3 KiB
C++
/************************************************************************
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Mysql Enterprise Backup
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Copyright (c) 2019, 2024, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is designed to work with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have either included with
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the program or referenced in the documentation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*************************************************************************/
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#ifndef BACKUP_PAGE_TRACKER_SERVICE_H
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#define BACKUP_PAGE_TRACKER_SERVICE_H
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#include <mysql/components/services/page_track_service.h>
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#include <list>
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#include "mysqlbackup.h"
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#ifdef __cplusplus
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class THD;
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#define MYSQL_THD THD *
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#else
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#define MYSQL_THD void *
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#endif
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#define CHANGED_PAGES_BUFFER_SIZE (16 * 1024 * 1024)
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// InnoDB page tracking service
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extern REQUIRES_SERVICE_PLACEHOLDER(mysql_page_track);
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int page_track_callback(MYSQL_THD opaque_thd, const uchar *buffer,
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size_t buffer_length, int page_count, void *context);
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struct udf_data_t {
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std::string m_name;
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Item_result m_return_type;
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Udf_func_any m_function;
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Udf_func_init m_init_function;
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Udf_func_deinit m_deinit_function;
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bool m_is_registered;
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udf_data_t(const std::string name, Item_result return_type,
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Udf_func_any function, Udf_func_init init_function,
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Udf_func_deinit deinit_function)
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: m_name(name),
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m_return_type(return_type),
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m_function(function),
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m_init_function(init_function),
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m_deinit_function(deinit_function),
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m_is_registered(false) {}
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};
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class Backup_page_tracker {
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private:
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static uchar *m_changed_pages_buf;
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static std::list<udf_data_t *> m_udf_list;
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static void initialize_udf_list();
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public:
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static bool m_receive_changed_page_data;
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static char *m_changed_pages_file;
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// Page track UDF functions
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static mysql_service_status_t register_udfs();
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static mysql_service_status_t unregister_udfs();
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static bool set_page_tracking_init(UDF_INIT *initid, UDF_ARGS *, char *);
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static void set_page_tracking_deinit(UDF_INIT *initid [[maybe_unused]]);
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static long long set_page_tracking(UDF_INIT *initid, UDF_ARGS *,
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unsigned char *is_null,
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unsigned char *error);
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static bool page_track_get_changed_pages_init(UDF_INIT *initid, UDF_ARGS *,
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char *);
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static void page_track_get_changed_pages_deinit(UDF_INIT *initid
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[[maybe_unused]]);
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static long long page_track_get_changed_pages(UDF_INIT *initid, UDF_ARGS *,
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unsigned char *is_null,
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unsigned char *error);
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static bool page_track_get_start_lsn_init(UDF_INIT *initid, UDF_ARGS *,
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char *);
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static void page_track_get_start_lsn_deinit(UDF_INIT *initid
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[[maybe_unused]]);
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static long long page_track_get_start_lsn(UDF_INIT *initid, UDF_ARGS *,
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unsigned char *is_null,
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unsigned char *error);
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static bool page_track_get_changed_page_count_init(UDF_INIT *initid,
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UDF_ARGS *, char *);
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static void page_track_get_changed_page_count_deinit(UDF_INIT *initid
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[[maybe_unused]]);
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static long long page_track_get_changed_page_count(UDF_INIT *initid,
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UDF_ARGS *,
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unsigned char *is_null,
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unsigned char *error);
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static bool page_track_purge_up_to_init(UDF_INIT *initid, UDF_ARGS *, char *);
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static void page_track_purge_up_to_deinit(UDF_INIT *initid [[maybe_unused]]);
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static long long page_track_purge_up_to(UDF_INIT *initid, UDF_ARGS *,
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unsigned char *is_null,
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unsigned char *error);
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// method to act on a changed backup-id
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static bool backup_id_update();
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/// Method to de-allocate the memory allocated for the buffer holding
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/// path value for the page-track file, if not done before.
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static void deinit();
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};
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#endif /* INC_PAGE_TRACKER_SERVICE_H */
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