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/*****************************************************************************
Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2017, MariaDB Corporation.
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 include/mtr0log.ic
Mini-transaction logging routines
Created 12/7/1995 Heikki Tuuri
*******************************************************/
#include "buf0dblwr.h"
#include "fsp0types.h"
#include "mach0data.h"
#include "trx0types.h"
/********************************************************//**
Opens a buffer to mlog. It must be closed with mlog_close.
@return buffer, NULL if log mode MTR_LOG_NONE or MTR_LOG_NO_REDO */
UNIV_INLINE
byte*
mlog_open(
/*======*/
mtr_t* mtr, /*!< in: mtr */
ulint size) /*!< in: buffer size in bytes; MUST be
smaller than mtr_t::buf_t::MAX_DATA_SIZE! */
{
mtr->set_modified();
if (mtr_get_log_mode(mtr) == MTR_LOG_NONE
|| mtr_get_log_mode(mtr) == MTR_LOG_NO_REDO) {
return(NULL);
}
return(mtr->get_log()->open(size));
}
/********************************************************//**
Closes a buffer opened to mlog. */
UNIV_INLINE
void
mlog_close(
/*=======*/
mtr_t* mtr, /*!< in: mtr */
byte* ptr) /*!< in: buffer space from ptr up was not used */
{
ut_ad(mtr_get_log_mode(mtr) != MTR_LOG_NONE);
ut_ad(mtr_get_log_mode(mtr) != MTR_LOG_NO_REDO);
mtr->get_log()->close(ptr);
}
/********************************************************//**
Catenates 1 - 4 bytes to the mtr log. The value is not compressed. */
UNIV_INLINE
void
mlog_catenate_ulint(
/*================*/
mtr_buf_t* mtr_buf, /*!< in/out: buffer to write */
ulint val, /*!< in: value to write */
mlog_id_t type) /*!< in: type of value to write */
{
compile_time_assert(MLOG_1BYTE == 1);
compile_time_assert(MLOG_2BYTES == 2);
compile_time_assert(MLOG_4BYTES == 4);
compile_time_assert(MLOG_8BYTES == 8);
byte* ptr = mtr_buf->push<byte*>(type);
switch (type) {
case MLOG_4BYTES:
mach_write_to_4(ptr, val);
break;
case MLOG_2BYTES:
mach_write_to_2(ptr, val);
break;
case MLOG_1BYTE:
mach_write_to_1(ptr, val);
break;
default:
ut_error;
}
}
/********************************************************//**
Catenates 1 - 4 bytes to the mtr log. The value is not compressed. */
UNIV_INLINE
void
mlog_catenate_ulint(
/*================*/
mtr_t* mtr, /*!< in/out: mtr */
ulint val, /*!< in: value to write */
mlog_id_t type) /*!< in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
{
if (mtr_get_log_mode(mtr) == MTR_LOG_NONE
|| mtr_get_log_mode(mtr) == MTR_LOG_NO_REDO) {
return;
}
mlog_catenate_ulint(mtr->get_log(), val, type);
}
/********************************************************//**
Catenates a compressed ulint to mlog. */
UNIV_INLINE
void
mlog_catenate_ulint_compressed(
/*===========================*/
mtr_t* mtr, /*!< in: mtr */
ulint val) /*!< in: value to write */
{
byte* log_ptr;
log_ptr = mlog_open(mtr, 10);
/* If no logging is requested, we may return now */
if (log_ptr == NULL) {
return;
}
log_ptr += mach_write_compressed(log_ptr, val);
mlog_close(mtr, log_ptr);
}
/********************************************************//**
Catenates a compressed 64-bit integer to mlog. */
UNIV_INLINE
void
mlog_catenate_ull_compressed(
/*=========================*/
mtr_t* mtr, /*!< in: mtr */
ib_uint64_t val) /*!< in: value to write */
{
byte* log_ptr;
log_ptr = mlog_open(mtr, 15);
/* If no logging is requested, we may return now */
if (log_ptr == NULL) {
return;
}
log_ptr += mach_u64_write_compressed(log_ptr, val);
mlog_close(mtr, log_ptr);
}
/** Writes a log record about an operation.
@param[in] type redo log record type
@param[in] space_id tablespace identifier
@param[in] page_no page number
@param[in,out] log_ptr current end of mini-transaction log
@param[in,out] mtr mini-transaction
@return end of mini-transaction log */
UNIV_INLINE
byte*
mlog_write_initial_log_record_low(
mlog_id_t type,
ulint space_id,
ulint page_no,
byte* log_ptr,
mtr_t* mtr)
{
ut_ad(type <= MLOG_BIGGEST_TYPE || EXTRA_CHECK_MLOG_NUMBER(type));
ut_ad(type == MLOG_FILE_NAME
|| type == MLOG_FILE_DELETE
|| type == MLOG_FILE_CREATE2
|| type == MLOG_FILE_RENAME2
|| type == MLOG_INDEX_LOAD
|| type == MLOG_TRUNCATE
|| type == MLOG_FILE_WRITE_CRYPT_DATA
|| mtr->is_named_space(space_id));
mach_write_to_1(log_ptr, type);
log_ptr++;
log_ptr += mach_write_compressed(log_ptr, space_id);
log_ptr += mach_write_compressed(log_ptr, page_no);
mtr->added_rec();
return(log_ptr);
}
/********************************************************//**
Writes the initial part of a log record (3..11 bytes).
If the implementation of this function is changed, all
size parameters to mlog_open() should be adjusted accordingly!
@return new value of log_ptr */
UNIV_INLINE
byte*
mlog_write_initial_log_record_fast(
/*===============================*/
const byte* ptr, /*!< in: pointer to (inside) a buffer
frame holding the file page where
modification is made */
mlog_id_t type, /*!< in: log item type: MLOG_1BYTE, ... */
byte* log_ptr,/*!< in: pointer to mtr log which has
been opened */
mtr_t* mtr) /*!< in/out: mtr */
{
const byte* page;
ulint space;
ulint offset;
ut_ad(log_ptr);
ut_d(mtr->memo_modify_page(ptr));
page = (const byte*) ut_align_down(ptr, UNIV_PAGE_SIZE);
space = mach_read_from_4(page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
offset = mach_read_from_4(page + FIL_PAGE_OFFSET);
/* check whether the page is in the doublewrite buffer;
the doublewrite buffer is located in pages
FSP_EXTENT_SIZE, ..., 3 * FSP_EXTENT_SIZE - 1 in the
system tablespace */
if (space == TRX_SYS_SPACE
&& offset >= FSP_EXTENT_SIZE && offset < 3 * FSP_EXTENT_SIZE) {
ut_ad(buf_dblwr_being_created);
/* Do nothing: we only come to this branch in an
InnoDB database creation. We do not redo log
anything for the doublewrite buffer pages. */
return(log_ptr);
}
return(mlog_write_initial_log_record_low(type, space, offset,
log_ptr, mtr));
}
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