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Diffstat (limited to 'storage/xtradb/buf/buf0checksum.cc')
| -rw-r--r-- | storage/xtradb/buf/buf0checksum.cc | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/storage/xtradb/buf/buf0checksum.cc b/storage/xtradb/buf/buf0checksum.cc deleted file mode 100644 index 01b646a78e0..00000000000 --- a/storage/xtradb/buf/buf0checksum.cc +++ /dev/null @@ -1,156 +0,0 @@ -/***************************************************************************** - -Copyright (c) 1995, 2015, Oracle and/or its affiliates. All Rights Reserved. - -This program is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free Software -Foundation; version 2 of the License. - -This program is distributed in the hope that it will be useful, but WITHOUT -ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - -You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., -51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA - -*****************************************************************************/ - -/**************************************************//** -@file buf/buf0checksum.cc -Buffer pool checksum functions, also linked from /extra/innochecksum.cc - -Created Aug 11, 2011 Vasil Dimov -*******************************************************/ - -#include "univ.i" -#include "fil0fil.h" /* FIL_* */ -#include "ut0crc32.h" /* ut_crc32() */ -#include "ut0rnd.h" /* ut_fold_binary() */ -#include "buf0types.h" - -#ifndef UNIV_INNOCHECKSUM - -#include "srv0srv.h" /* SRV_CHECKSUM_* */ - -#endif /* !UNIV_INNOCHECKSUM */ - -/** the macro MYSQL_SYSVAR_ENUM() requires "long unsigned int" and if we -use srv_checksum_algorithm_t here then we get a compiler error: -ha_innodb.cc:12251: error: cannot convert 'srv_checksum_algorithm_t*' to - 'long unsigned int*' in initialization */ -UNIV_INTERN ulong srv_checksum_algorithm = SRV_CHECKSUM_ALGORITHM_INNODB; - -/********************************************************************//** -Calculates a page CRC32 which is stored to the page when it is written -to a file. Note that we must be careful to calculate the same value on -32-bit and 64-bit architectures. -@return checksum */ -UNIV_INTERN -ib_uint32_t -buf_calc_page_crc32( -/*================*/ - const byte* page) /*!< in: buffer page */ -{ - ib_uint32_t checksum; - - /* Since the field FIL_PAGE_FILE_FLUSH_LSN, and in versions <= 4.1.x - FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, are written outside the buffer pool - to the first pages of data files, we have to skip them in the page - checksum calculation. - We must also skip the field FIL_PAGE_SPACE_OR_CHKSUM where the - checksum is stored, and also the last 8 bytes of page because - there we store the old formula checksum. */ - - checksum = ut_crc32(page + FIL_PAGE_OFFSET, - FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION - - FIL_PAGE_OFFSET) - ^ ut_crc32(page + FIL_PAGE_DATA, - UNIV_PAGE_SIZE - FIL_PAGE_DATA - - FIL_PAGE_END_LSN_OLD_CHKSUM); - - return(checksum); -} - -/********************************************************************//** -Calculates a page checksum which is stored to the page when it is written -to a file. Note that we must be careful to calculate the same value on -32-bit and 64-bit architectures. -@return checksum */ -UNIV_INTERN -ulint -buf_calc_page_new_checksum( -/*=======================*/ - const byte* page) /*!< in: buffer page */ -{ - ulint checksum; - - /* Since the field FIL_PAGE_FILE_FLUSH_LSN, and in versions <= 4.1.x - FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, are written outside the buffer pool - to the first pages of data files, we have to skip them in the page - checksum calculation. - We must also skip the field FIL_PAGE_SPACE_OR_CHKSUM where the - checksum is stored, and also the last 8 bytes of page because - there we store the old formula checksum. */ - - checksum = ut_fold_binary(page + FIL_PAGE_OFFSET, - FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION - - FIL_PAGE_OFFSET) - + ut_fold_binary(page + FIL_PAGE_DATA, - UNIV_PAGE_SIZE - FIL_PAGE_DATA - - FIL_PAGE_END_LSN_OLD_CHKSUM); - checksum = checksum & 0xFFFFFFFFUL; - - return(checksum); -} - -/********************************************************************//** -In versions < 4.0.14 and < 4.1.1 there was a bug that the checksum only -looked at the first few bytes of the page. This calculates that old -checksum. -NOTE: we must first store the new formula checksum to -FIL_PAGE_SPACE_OR_CHKSUM before calculating and storing this old checksum -because this takes that field as an input! -@return checksum */ -UNIV_INTERN -ulint -buf_calc_page_old_checksum( -/*=======================*/ - const byte* page) /*!< in: buffer page */ -{ - ulint checksum; - - checksum = ut_fold_binary(page, FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION); - - checksum = checksum & 0xFFFFFFFFUL; - - return(checksum); -} - -/********************************************************************//** -Return a printable string describing the checksum algorithm. -@return algorithm name */ -UNIV_INTERN -const char* -buf_checksum_algorithm_name( -/*========================*/ - srv_checksum_algorithm_t algo) /*!< in: algorithm */ -{ - switch (algo) { - case SRV_CHECKSUM_ALGORITHM_CRC32: - return("crc32"); - case SRV_CHECKSUM_ALGORITHM_STRICT_CRC32: - return("strict_crc32"); - case SRV_CHECKSUM_ALGORITHM_INNODB: - return("innodb"); - case SRV_CHECKSUM_ALGORITHM_STRICT_INNODB: - return("strict_innodb"); - case SRV_CHECKSUM_ALGORITHM_NONE: - return("none"); - case SRV_CHECKSUM_ALGORITHM_STRICT_NONE: - return("strict_none"); - } - - ut_error; - return(NULL); -} |