log0files_finder.h

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/**************************************************/ /**
 @file include/log0files_finder.h
 
 *******************************************************/
 
#ifndef log0files_finder_h
#define log0files_finder_h
 
#include <string>
 
/* Log_files_dict */
#include "log0files_dict.h"
 
/* Log_format, Log_flags */
#include "log0types.h"
 
/** Result returned by the @see log_files_find_and_analyze(). */
enum class Log_files_find_result {
  /** We have found valid log files. */
  FOUND_VALID_FILES,
 
  /** There were log files which have not been fully initialized. */
  FOUND_UNINITIALIZED_FILES,
 
  /** There were no log files at all. */
  FOUND_NO_FILES,
 
  /** Found valid log files, but discovered that some of the newest are missing.
  When this is reported, it means that the only reason why the FOUND_VALID_FILES
  was not returned, is that the newest found log file has been already marked as
  full. */
  FOUND_VALID_FILES_BUT_MISSING_NEWEST,
 
  /** Found log files, but marked as "crash unsafe" (disabled redo) */
  FOUND_DISABLED_FILES,
 
  /** Found log files, but structure is corrupted. */
  FOUND_CORRUPTED_FILES,
 
  /** System error occurred when scanning files on disk. */
  SYSTEM_ERROR
};
 
/** Scans for existing log files on disk. Performs basic validation for the
files that have been found. Clears and builds the Log_files_dict. Determines
global properties of the redo log files: format, creator, flags and uuid.
@param[in]    read_only            T: check file permissions only for reading,
                                   F: check for both reading and writing
@param[in]    encryption_metadata  pointer to encryption metadata to be used by
                                   all redo log file IO operations except those
                                   related to the first LOG_FILE_HDR_SIZE bytes
                                   of each log file
                                   @see Log_file_handle::m_encryption_metadata
@param[out]   files                dictionary of files that have been found
                                   when FOUND_VALID_FILES is returned;
                                   otherwise stays untouched
@param[out]   format               discovered format of the redo log files
@param[out]   creator_name         name of creator of the files
@param[out]   log_flags            discovered flags of the redo log files
@param[out]   log_uuid             discovered uuid of the redo log files
@return result of the scan and validation - @see Log_files_find_result */
Log_files_find_result log_files_find_and_analyze(
    bool read_only, Encryption_metadata &encryption_metadata,
    Log_files_dict &files, Log_format &format, std::string &creator_name,
    Log_flags &log_flags, Log_uuid &log_uuid);
 
#endif /* !log0files_finder_h */