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08b7152893
- fixes (in recovery, checkpoint, log handler) of bugs found during testing. - new option --check for maria_read_log: with --only-display (which only reads the header) it reads the full record, for debugging. storage/maria/ma_loghandler.c: importing patch from Sanja for bug of translog_next_LSN() found during recovery storage/maria/ma_loghandler_lsn.h: better types (0L is 4 bytes on some platforms, it causes problems when used into lsn_store(): right shift >= width of type. storage/maria/ma_pagecache.c: work around infamous "PAGECACHE_PLAIN_PAGE used for transactional tables in specialm case"; REDO phase disables logging and this causes pages to be PAGECACHE_PLAIN_PAGE, thus ignored wrongly by the checkpoint taken at the end of the REDO phase. storage/maria/ma_recovery.c: - a #ifdef which broke maria_read_log in non-debug builds (no output!) - support for maria_read_log --check - detect record corruption before opening the table - updating is_of_horizon requires writing the state - fix for wrong parsing of checkpoint record by recovery storage/maria/ma_recovery.h: support for maria_read_log --check storage/maria/maria_read_log.c: Option --check: --only-display only looks at the header; adding --check tries a translog_read_record() to see if record can be fully read (this is to find bugs).
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/* Copyright (C) 2007 MySQL AB & Sanja Belkin
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef _ma_loghandler_lsn_h
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#define _ma_loghandler_lsn_h
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/*
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Transaction log record address:
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file_no << 32 | offset
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file_no is only 3 bytes so we can use signed integer to make
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comparison more simple.
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*/
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typedef int64 TRANSLOG_ADDRESS;
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/*
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Compare addresses
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A1 > A2 -> result > 0
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A1 == A2 -> 0
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A1 < A2 -> result < 0
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*/
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#define cmp_translog_addr(A1,A2) ((A1) - (A2))
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/* LSN type (address of certain log record chank */
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typedef TRANSLOG_ADDRESS LSN;
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/* Gets file number part of a LSN/log address */
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#define LSN_FILE_NO(L) ((L) >> 32)
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/* Gets raw file number part of a LSN/log address */
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#define LSN_FILE_NO_PART(L) ((L) & ((int64)0xFFFFFF00000000LL))
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/* Parts of LSN for printing */
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#define LSN_IN_PARTS(L) (ulong)LSN_FILE_NO(L),(ulong)LSN_OFFSET(L)
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/* Gets record offset of a LSN/log address */
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#define LSN_OFFSET(L) ((L) & 0xFFFFFFFFL)
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/* Makes lsn/log address from file number and record offset */
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#define MAKE_LSN(F,S) ((LSN) ((((uint64)(F)) << 32) | (S)))
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/* checks LSN */
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#define LSN_VALID(L) \
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((LSN_FILE_NO_PART(L) != FILENO_IMPOSSIBLE) && \
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(LSN_OFFSET(L) != LOG_OFFSET_IMPOSSIBLE))
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/* size of stored LSN on a disk, don't change it! */
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#define LSN_STORE_SIZE 7
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/* Puts LSN into buffer (dst) */
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#define lsn_store(dst, lsn) \
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do { \
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int3store((dst), LSN_FILE_NO(lsn)); \
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int4store((dst) + 3, LSN_OFFSET(lsn)); \
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} while (0)
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/* Unpacks LSN from the buffer (P) */
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#define lsn_korr(P) MAKE_LSN(uint3korr(P), uint4korr((P) + 3))
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/* what we need to add to LSN to increase it on one file */
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#define LSN_ONE_FILE ((int64)0x100000000LL)
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#define LSN_REPLACE_OFFSET(L, S) (LSN_FILE_NO_PART(L) | (S))
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/*
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an 8-byte type whose most significant uchar is used for "flags"; 7
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other bytes are a LSN.
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*/
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typedef LSN LSN_WITH_FLAGS;
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#define LSN_WITH_FLAGS_TO_LSN(x) (x & ULL(0x00FFFFFFFFFFFFFF))
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#define LSN_WITH_FLAGS_TO_FLAGS(x) (x & ULL(0xFF00000000000000))
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#define FILENO_IMPOSSIBLE 0 /**< log file's numbering starts at 1 */
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#define LOG_OFFSET_IMPOSSIBLE 0 /**< log always has a header */
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#define LSN_IMPOSSIBLE ((LSN)0)
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/* following LSN also is impossible */
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#define LSN_ERROR ((LSN)1)
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/** @brief some impossible LSN serve as markers */
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#define LSN_REPAIRED_BY_MARIA_CHK ((LSN)2)
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/**
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@brief the maximum valid LSN.
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Unlike ULONGLONG_MAX, it can be safely used in comparison with valid LSNs
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(ULONGLONG_MAX is too big for correctness of cmp_translog_address()).
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*/
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#define LSN_MAX (LSN)ULL(0x00FFFFFFFFFFFFFF)
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#endif
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