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e6b3e38d62
The new option --log-innodb-page-corruption is introduced. When this option is set, backup is not interrupted if innodb corrupted page is detected. Instead it logs all found corrupted pages in innodb_corrupted_pages file in backup directory and finishes with error. For incremental backup corrupted pages are also copied to .delta file, because we can't do LSN check for such pages during backup, innodb_corrupted_pages will also be created in incremental backup directory. During --prepare, corrupted pages list is read from the file just after redo log is applied, and each page from the list is checked if it is allocated in it's tablespace or not. If it is not allocated, then it is zeroed out, flushed to the tablespace and removed from the list. If all pages are removed from the list, then --prepare is finished successfully and innodb_corrupted_pages file is removed from backup directory. Otherwise --prepare is finished with error message and innodb_corrupted_pages contains the list of the pages, which are detected as corrupted during backup, and are allocated in their tablespaces, what means backup directory contains corrupted innodb pages, and backup can not be considered as consistent. For incremental --prepare corrupted pages from .delta files are applied to the base backup, innodb_corrupted_pages is read from both base in incremental directories, and the same action is proceded for corrupted pages list as for full --prepare. innodb_corrupted_pages file is modified or removed only in base directory. If DDL happens during backup, it is also processed at the end of backup to have correct tablespace names in innodb_corrupted_pages.
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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#ifndef XTRABACKUP_BACKUP_COPY_H
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#define XTRABACKUP_BACKUP_COPY_H
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#include <my_global.h>
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#include <mysql.h>
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#include "datasink.h"
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/* special files */
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#define XTRABACKUP_SLAVE_INFO "xtrabackup_slave_info"
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#define XTRABACKUP_GALERA_INFO "xtrabackup_galera_info"
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#define XTRABACKUP_BINLOG_INFO "xtrabackup_binlog_info"
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#define XTRABACKUP_INFO "xtrabackup_info"
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extern bool binlog_locked;
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bool
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backup_file_printf(const char *filename, const char *fmt, ...)
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ATTRIBUTE_FORMAT(printf, 2, 0);
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/************************************************************************
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Return true if first and second arguments are the same path. */
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bool
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equal_paths(const char *first, const char *second);
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/************************************************************************
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Copy file for backup/restore.
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@return true in case of success. */
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bool
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copy_file(ds_ctxt_t *datasink,
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const char *src_file_path,
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const char *dst_file_path,
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uint thread_n);
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/** Start --backup */
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bool backup_start(CorruptedPages &corrupted_pages);
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/** Release resources after backup_start() */
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void backup_release();
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/** Finish after backup_start() and backup_release() */
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bool backup_finish();
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bool
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apply_log_finish();
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bool
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copy_back();
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bool
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decrypt_decompress();
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bool
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is_path_separator(char);
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bool
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directory_exists(const char *dir, bool create);
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lsn_t
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get_current_lsn(MYSQL *connection);
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bool backup_file_print_buf(const char *filename, const char *buf, int buf_len);
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#endif
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