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mariadb/storage/innobase/log/log0recv.cc
Jan Lindström a03dd94be8 MDEV-6936: Buffer pool list scan optimization 
Merged Facebook commit 617aef9f911d825e9053f3d611d0389e02031225
authored by Inaam Rana to InnoDB storage engine (not XtraDB)
from https://github.com/facebook/mysql-5.6

WL#7047 - Optimize buffer pool list scans and related batch processing

Reduce excessive scanning of pages when doing flush list batches. The
fix is to introduce the concept of "Hazard Pointer", this reduces the
time complexity of the scan from O(n*n) to O.

The concept of hazard pointer is reversed in this work. Academically
hazard pointer is a pointer that the thread working on it will declar
such and as long as that thread is not done no other thread is allowe
do anything with it.

In this WL we declare the pointer as a hazard pointer and then if any
thread attempts to work on it, it is allowed to do so but it has to a
the hazard pointer to the next valid value. We use hazard pointer sol
reverse traversal of lists within a buffer pool instance.

Add an event to control the background flush thread. The background f
thread wait has been converted to an os event timed wait so that it c
signalled by threads that want to kick start a background flush when
buffer pool is running low on free/dirty pages.
2014-11-06 13:17:11 +02:00

4022 lines
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/*****************************************************************************
Copyright (c) 1997, 2014, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2012, Facebook Inc.
Copyright (c) 2013, SkySQL Ab. 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 log/log0recv.cc
Recovery
Created 9/20/1997 Heikki Tuuri
*******************************************************/
// First include (the generated) my_config.h, to get correct platform defines.
#include "my_config.h"
#include <stdio.h> // Solaris/x86 header file bug
#include <vector>
#include "log0recv.h"
#ifdef UNIV_NONINL
#include "log0recv.ic"
#endif
#include "mem0mem.h"
#include "buf0buf.h"
#include "buf0flu.h"
#include "mtr0mtr.h"
#include "mtr0log.h"
#include "page0cur.h"
#include "page0zip.h"
#include "btr0btr.h"
#include "btr0cur.h"
#include "ibuf0ibuf.h"
#include "trx0undo.h"
#include "trx0rec.h"
#include "fil0fil.h"
#ifndef UNIV_HOTBACKUP
# include "buf0rea.h"
# include "srv0srv.h"
# include "srv0start.h"
# include "trx0roll.h"
# include "row0merge.h"
# include "sync0sync.h"
#else /* !UNIV_HOTBACKUP */
/** This is set to FALSE if the backup was originally taken with the
mysqlbackup --include regexp option: then we do not want to create tables in
directories which were not included */
UNIV_INTERN ibool recv_replay_file_ops = TRUE;
#endif /* !UNIV_HOTBACKUP */
/** Log records are stored in the hash table in chunks at most of this size;
this must be less than UNIV_PAGE_SIZE as it is stored in the buffer pool */
#define RECV_DATA_BLOCK_SIZE (MEM_MAX_ALLOC_IN_BUF - sizeof(recv_data_t))
/** Read-ahead area in applying log records to file pages */
#define RECV_READ_AHEAD_AREA 32
/** The recovery system */
UNIV_INTERN recv_sys_t* recv_sys = NULL;
/** TRUE when applying redo log records during crash recovery; FALSE
otherwise. Note that this is FALSE while a background thread is
rolling back incomplete transactions. */
UNIV_INTERN ibool recv_recovery_on;
#ifdef UNIV_LOG_ARCHIVE
/** TRUE when applying redo log records from an archived log file */
UNIV_INTERN ibool recv_recovery_from_backup_on;
#endif /* UNIV_LOG_ARCHIVE */
#ifndef UNIV_HOTBACKUP
/** TRUE when recv_init_crash_recovery() has been called. */
UNIV_INTERN ibool recv_needed_recovery;
# ifdef UNIV_DEBUG
/** TRUE if writing to the redo log (mtr_commit) is forbidden.
Protected by log_sys->mutex. */
UNIV_INTERN ibool recv_no_log_write = FALSE;
# endif /* UNIV_DEBUG */
/** TRUE if buf_page_is_corrupted() should check if the log sequence
number (FIL_PAGE_LSN) is in the future. Initially FALSE, and set by
recv_recovery_from_checkpoint_start_func(). */
UNIV_INTERN ibool recv_lsn_checks_on;
/** There are two conditions under which we scan the logs, the first
is normal startup and the second is when we do a recovery from an
archive.
This flag is set if we are doing a scan from the last checkpoint during
startup. If we find log entries that were written after the last checkpoint
we know that the server was not cleanly shutdown. We must then initialize
the crash recovery environment before attempting to store these entries in
the log hash table. */
static ibool recv_log_scan_is_startup_type;
/** If the following is TRUE, the buffer pool file pages must be invalidated
after recovery and no ibuf operations are allowed; this becomes TRUE if
the log record hash table becomes too full, and log records must be merged
to file pages already before the recovery is finished: in this case no
ibuf operations are allowed, as they could modify the pages read in the
buffer pool before the pages have been recovered to the up-to-date state.
TRUE means that recovery is running and no operations on the log files
are allowed yet: the variable name is misleading. */
UNIV_INTERN ibool recv_no_ibuf_operations;
/** TRUE when the redo log is being backed up */
# define recv_is_making_a_backup FALSE
/** TRUE when recovering from a backed up redo log file */
# define recv_is_from_backup FALSE
#else /* !UNIV_HOTBACKUP */
# define recv_needed_recovery FALSE
/** TRUE when the redo log is being backed up */
UNIV_INTERN ibool recv_is_making_a_backup = FALSE;
/** TRUE when recovering from a backed up redo log file */
UNIV_INTERN ibool recv_is_from_backup = FALSE;
# define buf_pool_get_curr_size() (5 * 1024 * 1024)
#endif /* !UNIV_HOTBACKUP */
/** The following counter is used to decide when to print info on
log scan */
static ulint recv_scan_print_counter;
/** The type of the previous parsed redo log record */
static ulint recv_previous_parsed_rec_type;
/** The offset of the previous parsed redo log record */
static ulint recv_previous_parsed_rec_offset;
/** The 'multi' flag of the previous parsed redo log record */
static ulint recv_previous_parsed_rec_is_multi;
/** Maximum page number encountered in the redo log */
UNIV_INTERN ulint recv_max_parsed_page_no;
/** This many frames must be left free in the buffer pool when we scan
the log and store the scanned log records in the buffer pool: we will
use these free frames to read in pages when we start applying the
log records to the database.
This is the default value. If the actual size of the buffer pool is
larger than 10 MB we'll set this value to 512. */
UNIV_INTERN ulint recv_n_pool_free_frames;
/** The maximum lsn we see for a page during the recovery process. If this
is bigger than the lsn we are able to scan up to, that is an indication that
the recovery failed and the database may be corrupt. */
UNIV_INTERN lsn_t recv_max_page_lsn;
#ifdef UNIV_PFS_THREAD
UNIV_INTERN mysql_pfs_key_t trx_rollback_clean_thread_key;
#endif /* UNIV_PFS_THREAD */
#ifdef UNIV_PFS_MUTEX
UNIV_INTERN mysql_pfs_key_t recv_sys_mutex_key;
#endif /* UNIV_PFS_MUTEX */
#ifndef UNIV_HOTBACKUP
# ifdef UNIV_PFS_THREAD
UNIV_INTERN mysql_pfs_key_t recv_writer_thread_key;
# endif /* UNIV_PFS_THREAD */
# ifdef UNIV_PFS_MUTEX
UNIV_INTERN mysql_pfs_key_t recv_writer_mutex_key;
# endif /* UNIV_PFS_MUTEX */
/** Flag indicating if recv_writer thread is active. */
UNIV_INTERN bool recv_writer_thread_active = false;
UNIV_INTERN os_thread_t recv_writer_thread_handle = 0;
#endif /* !UNIV_HOTBACKUP */
/* prototypes */
#ifndef UNIV_HOTBACKUP
/*******************************************************//**
Initialize crash recovery environment. Can be called iff
recv_needed_recovery == FALSE. */
static
void
recv_init_crash_recovery(void);
/*===========================*/
#endif /* !UNIV_HOTBACKUP */
/********************************************************//**
Creates the recovery system. */
UNIV_INTERN
void
recv_sys_create(void)
/*=================*/
{
if (recv_sys != NULL) {
return;
}
recv_sys = static_cast<recv_sys_t*>(mem_zalloc(sizeof(*recv_sys)));
mutex_create(recv_sys_mutex_key, &recv_sys->mutex, SYNC_RECV);
#ifndef UNIV_HOTBACKUP
mutex_create(recv_writer_mutex_key, &recv_sys->writer_mutex,
SYNC_LEVEL_VARYING);
#endif /* !UNIV_HOTBACKUP */
recv_sys->heap = NULL;
recv_sys->addr_hash = NULL;
}
/********************************************************//**
Release recovery system mutexes. */
UNIV_INTERN
void
recv_sys_close(void)
/*================*/
{
if (recv_sys != NULL) {
if (recv_sys->addr_hash != NULL) {
hash_table_free(recv_sys->addr_hash);
}
if (recv_sys->heap != NULL) {
mem_heap_free(recv_sys->heap);
}
if (recv_sys->buf != NULL) {
ut_free(recv_sys->buf);
}
if (recv_sys->last_block_buf_start != NULL) {
mem_free(recv_sys->last_block_buf_start);
}
#ifndef UNIV_HOTBACKUP
ut_ad(!recv_writer_thread_active);
mutex_free(&recv_sys->writer_mutex);
#endif /* !UNIV_HOTBACKUP */
mutex_free(&recv_sys->mutex);
mem_free(recv_sys);
recv_sys = NULL;
}
}
/********************************************************//**
Frees the recovery system memory. */
UNIV_INTERN
void
recv_sys_mem_free(void)
/*===================*/
{
if (recv_sys != NULL) {
if (recv_sys->addr_hash != NULL) {
hash_table_free(recv_sys->addr_hash);
}
if (recv_sys->heap != NULL) {
mem_heap_free(recv_sys->heap);
}
if (recv_sys->buf != NULL) {
ut_free(recv_sys->buf);
}
if (recv_sys->last_block_buf_start != NULL) {
mem_free(recv_sys->last_block_buf_start);
}
mem_free(recv_sys);
recv_sys = NULL;
}
}
#ifndef UNIV_HOTBACKUP
/************************************************************
Reset the state of the recovery system variables. */
UNIV_INTERN
void
recv_sys_var_init(void)
/*===================*/
{
recv_lsn_checks_on = FALSE;
recv_n_pool_free_frames = 256;
recv_recovery_on = FALSE;
#ifdef UNIV_LOG_ARCHIVE
recv_recovery_from_backup_on = FALSE;
#endif /* UNIV_LOG_ARCHIVE */
recv_needed_recovery = FALSE;
recv_lsn_checks_on = FALSE;
recv_log_scan_is_startup_type = FALSE;
recv_no_ibuf_operations = FALSE;
recv_scan_print_counter = 0;
recv_previous_parsed_rec_type = 999999;
recv_previous_parsed_rec_offset = 0;
recv_previous_parsed_rec_is_multi = 0;
recv_max_parsed_page_no = 0;
recv_n_pool_free_frames = 256;
recv_max_page_lsn = 0;
}
/******************************************************************//**
recv_writer thread tasked with flushing dirty pages from the buffer
pools.
@return a dummy parameter */
extern "C" UNIV_INTERN
os_thread_ret_t
DECLARE_THREAD(recv_writer_thread)(
/*===============================*/
void* arg __attribute__((unused)))
/*!< in: a dummy parameter required by
os_thread_create */
{
ut_ad(!srv_read_only_mode);
#ifdef UNIV_PFS_THREAD
pfs_register_thread(recv_writer_thread_key);
#endif /* UNIV_PFS_THREAD */
#ifdef UNIV_DEBUG_THREAD_CREATION
fprintf(stderr, "InnoDB: recv_writer thread running, id %lu\n",
os_thread_pf(os_thread_get_curr_id()));
#endif /* UNIV_DEBUG_THREAD_CREATION */
recv_writer_thread_active = true;
while (srv_shutdown_state == SRV_SHUTDOWN_NONE) {
/* Wait till we get a signal to clean the LRU list.
Bounded by max wait time of 100ms. */
ib_int64_t sig_count = os_event_reset(buf_flush_event);
os_event_wait_time_low(buf_flush_event, 100000, sig_count);
mutex_enter(&recv_sys->writer_mutex);
if (!recv_recovery_on) {
mutex_exit(&recv_sys->writer_mutex);
break;
}
/* Flush pages from end of LRU if required */
buf_flush_LRU_tail();
mutex_exit(&recv_sys->writer_mutex);
}
recv_writer_thread_active = false;
/* We count the number of threads in os_thread_exit().
A created thread should always use that to exit and not
use return() to exit. */
os_thread_exit(NULL);
OS_THREAD_DUMMY_RETURN;
}
#endif /* !UNIV_HOTBACKUP */
/************************************************************
Inits the recovery system for a recovery operation. */
UNIV_INTERN
void
recv_sys_init(
/*==========*/
ulint available_memory) /*!< in: available memory in bytes */
{
if (recv_sys->heap != NULL) {
return;
}
#ifndef UNIV_HOTBACKUP
/* Initialize red-black tree for fast insertions into the
flush_list during recovery process.
As this initialization is done while holding the buffer pool
mutex we perform it before acquiring recv_sys->mutex. */
buf_flush_init_flush_rbt();
mutex_enter(&(recv_sys->mutex));
recv_sys->heap = mem_heap_create_typed(256,
MEM_HEAP_FOR_RECV_SYS);
#else /* !UNIV_HOTBACKUP */
recv_sys->heap = mem_heap_create(256);
recv_is_from_backup = TRUE;
#endif /* !UNIV_HOTBACKUP */
/* Set appropriate value of recv_n_pool_free_frames. */
if (buf_pool_get_curr_size() >= (10 * 1024 * 1024)) {
/* Buffer pool of size greater than 10 MB. */
recv_n_pool_free_frames = 512;
}
recv_sys->buf = static_cast<byte*>(ut_malloc(RECV_PARSING_BUF_SIZE));
recv_sys->len = 0;
recv_sys->recovered_offset = 0;
recv_sys->addr_hash = hash_create(available_memory / 512);
recv_sys->n_addrs = 0;
recv_sys->apply_log_recs = FALSE;
recv_sys->apply_batch_on = FALSE;
recv_sys->last_block_buf_start = static_cast<byte*>(
mem_alloc(2 * OS_FILE_LOG_BLOCK_SIZE));
recv_sys->last_block = static_cast<byte*>(ut_align(
recv_sys->last_block_buf_start, OS_FILE_LOG_BLOCK_SIZE));
recv_sys->found_corrupt_log = FALSE;
recv_max_page_lsn = 0;
/* Call the constructor for recv_sys_t::dblwr member */
new (&recv_sys->dblwr) recv_dblwr_t();
mutex_exit(&(recv_sys->mutex));
}
/********************************************************//**
Empties the hash table when it has been fully processed. */
static
void
recv_sys_empty_hash(void)
/*=====================*/
{
ut_ad(mutex_own(&(recv_sys->mutex)));
if (recv_sys->n_addrs != 0) {
fprintf(stderr,
"InnoDB: Error: %lu pages with log records"
" were left unprocessed!\n"
"InnoDB: Maximum page number with"
" log records on it %lu\n",
(ulong) recv_sys->n_addrs,
(ulong) recv_max_parsed_page_no);
ut_error;
}
hash_table_free(recv_sys->addr_hash);
mem_heap_empty(recv_sys->heap);
recv_sys->addr_hash = hash_create(buf_pool_get_curr_size() / 512);
}
#ifndef UNIV_HOTBACKUP
# ifndef UNIV_LOG_DEBUG
/********************************************************//**
Frees the recovery system. */
static
void
recv_sys_debug_free(void)
/*=====================*/
{
mutex_enter(&(recv_sys->mutex));
hash_table_free(recv_sys->addr_hash);
mem_heap_free(recv_sys->heap);
ut_free(recv_sys->buf);
mem_free(recv_sys->last_block_buf_start);
recv_sys->buf = NULL;
recv_sys->heap = NULL;
recv_sys->addr_hash = NULL;
recv_sys->last_block_buf_start = NULL;
mutex_exit(&(recv_sys->mutex));
/* Free up the flush_rbt. */
buf_flush_free_flush_rbt();
}
# endif /* UNIV_LOG_DEBUG */
# ifdef UNIV_LOG_ARCHIVE
/********************************************************//**
Truncates possible corrupted or extra records from a log group. */
static
void
recv_truncate_group(
/*================*/
log_group_t* group, /*!< in: log group */
lsn_t recovered_lsn, /*!< in: recovery succeeded up to this
lsn */
lsn_t limit_lsn, /*!< in: this was the limit for
recovery */
lsn_t checkpoint_lsn, /*!< in: recovery was started from this
checkpoint */
lsn_t archived_lsn) /*!< in: the log has been archived up to
this lsn */
{
lsn_t start_lsn;
lsn_t end_lsn;
lsn_t finish_lsn1;
lsn_t finish_lsn2;
lsn_t finish_lsn;
if (archived_lsn == LSN_MAX) {
/* Checkpoint was taken in the NOARCHIVELOG mode */
archived_lsn = checkpoint_lsn;
}
finish_lsn1 = ut_uint64_align_down(archived_lsn,
OS_FILE_LOG_BLOCK_SIZE)
+ log_group_get_capacity(group);
finish_lsn2 = ut_uint64_align_up(recovered_lsn,
OS_FILE_LOG_BLOCK_SIZE)
+ recv_sys->last_log_buf_size;
if (limit_lsn != LSN_MAX) {
/* We do not know how far we should erase log records: erase
as much as possible */
finish_lsn = finish_lsn1;
} else {
/* It is enough to erase the length of the log buffer */
finish_lsn = finish_lsn1 < finish_lsn2
? finish_lsn1 : finish_lsn2;
}
ut_a(RECV_SCAN_SIZE <= log_sys->buf_size);
memset(log_sys->buf, 0, RECV_SCAN_SIZE);
start_lsn = ut_uint64_align_down(recovered_lsn,
OS_FILE_LOG_BLOCK_SIZE);
if (start_lsn != recovered_lsn) {
/* Copy the last incomplete log block to the log buffer and
edit its data length: */
lsn_t diff = recovered_lsn - start_lsn;
ut_a(diff <= 0xFFFFUL);
ut_memcpy(log_sys->buf, recv_sys->last_block,
OS_FILE_LOG_BLOCK_SIZE);
log_block_set_data_len(log_sys->buf, (ulint) diff);
}
if (start_lsn >= finish_lsn) {
return;
}
for (;;) {
ulint len;
end_lsn = start_lsn + RECV_SCAN_SIZE;
if (end_lsn > finish_lsn) {
end_lsn = finish_lsn;
}
len = (ulint) (end_lsn - start_lsn);
log_group_write_buf(group, log_sys->buf, len, start_lsn, 0);
if (end_lsn >= finish_lsn) {
return;
}
memset(log_sys->buf, 0, RECV_SCAN_SIZE);
start_lsn = end_lsn;
}
}
/********************************************************//**
Copies the log segment between group->recovered_lsn and recovered_lsn from the
most up-to-date log group to group, so that it contains the latest log data. */
static
void
recv_copy_group(
/*============*/
log_group_t* up_to_date_group, /*!< in: the most up-to-date log
group */
log_group_t* group, /*!< in: copy to this log
group */
lsn_t recovered_lsn) /*!< in: recovery succeeded up
to this lsn */
{
lsn_t start_lsn;
lsn_t end_lsn;
if (group->scanned_lsn >= recovered_lsn) {
return;
}
ut_a(RECV_SCAN_SIZE <= log_sys->buf_size);
start_lsn = ut_uint64_align_down(group->scanned_lsn,
OS_FILE_LOG_BLOCK_SIZE);
for (;;) {
ulint len;
end_lsn = start_lsn + RECV_SCAN_SIZE;
if (end_lsn > recovered_lsn) {
end_lsn = ut_uint64_align_up(recovered_lsn,
OS_FILE_LOG_BLOCK_SIZE);
}
log_group_read_log_seg(LOG_RECOVER, log_sys->buf,
up_to_date_group, start_lsn, end_lsn);
len = (ulint) (end_lsn - start_lsn);
log_group_write_buf(group, log_sys->buf, len, start_lsn, 0);
if (end_lsn >= recovered_lsn) {
return;
}
start_lsn = end_lsn;
}
}
# endif /* UNIV_LOG_ARCHIVE */
/********************************************************//**
Copies a log segment from the most up-to-date log group to the other log
groups, so that they all contain the latest log data. Also writes the info
about the latest checkpoint to the groups, and inits the fields in the group
memory structs to up-to-date values. */
static
void
recv_synchronize_groups(
/*====================*/
#ifdef UNIV_LOG_ARCHIVE
log_group_t* up_to_date_group /*!< in: the most up-to-date
log group */
#endif
)
{
lsn_t start_lsn;
lsn_t end_lsn;
lsn_t recovered_lsn;
recovered_lsn = recv_sys->recovered_lsn;
/* Read the last recovered log block to the recovery system buffer:
the block is always incomplete */
start_lsn = ut_uint64_align_down(recovered_lsn,
OS_FILE_LOG_BLOCK_SIZE);
end_lsn = ut_uint64_align_up(recovered_lsn, OS_FILE_LOG_BLOCK_SIZE);
ut_a(start_lsn != end_lsn);
log_group_read_log_seg(LOG_RECOVER, recv_sys->last_block,
#ifdef UNIV_LOG_ARCHIVE
up_to_date_group,
#else /* UNIV_LOG_ARCHIVE */
UT_LIST_GET_FIRST(log_sys->log_groups),
#endif /* UNIV_LOG_ARCHIVE */
start_lsn, end_lsn);
for (log_group_t* group = UT_LIST_GET_FIRST(log_sys->log_groups);
group;
group = UT_LIST_GET_NEXT(log_groups, group)) {
#ifdef UNIV_LOG_ARCHIVE
if (group != up_to_date_group) {
/* Copy log data if needed */
recv_copy_group(group, up_to_date_group,
recovered_lsn);
}
#endif /* UNIV_LOG_ARCHIVE */
/* Update the fields in the group struct to correspond to
recovered_lsn */
log_group_set_fields(group, recovered_lsn);
}
/* Copy the checkpoint info to the groups; remember that we have
incremented checkpoint_no by one, and the info will not be written
over the max checkpoint info, thus making the preservation of max
checkpoint info on disk certain */
log_groups_write_checkpoint_info();
mutex_exit(&(log_sys->mutex));
/* Wait for the checkpoint write to complete */
rw_lock_s_lock(&(log_sys->checkpoint_lock));
rw_lock_s_unlock(&(log_sys->checkpoint_lock));
mutex_enter(&(log_sys->mutex));
}
#endif /* !UNIV_HOTBACKUP */
/***********************************************************************//**
Checks the consistency of the checkpoint info
@return TRUE if ok */
static
ibool
recv_check_cp_is_consistent(
/*========================*/
const byte* buf) /*!< in: buffer containing checkpoint info */
{
ulint fold;
fold = ut_fold_binary(buf, LOG_CHECKPOINT_CHECKSUM_1);
if ((fold & 0xFFFFFFFFUL) != mach_read_from_4(
buf + LOG_CHECKPOINT_CHECKSUM_1)) {
return(FALSE);
}
fold = ut_fold_binary(buf + LOG_CHECKPOINT_LSN,
LOG_CHECKPOINT_CHECKSUM_2 - LOG_CHECKPOINT_LSN);
if ((fold & 0xFFFFFFFFUL) != mach_read_from_4(
buf + LOG_CHECKPOINT_CHECKSUM_2)) {
return(FALSE);
}
return(TRUE);
}
#ifndef UNIV_HOTBACKUP
/********************************************************//**
Looks for the maximum consistent checkpoint from the log groups.
@return error code or DB_SUCCESS */
static __attribute__((nonnull, warn_unused_result))
dberr_t
recv_find_max_checkpoint(
/*=====================*/
log_group_t** max_group, /*!< out: max group */
ulint* max_field) /*!< out: LOG_CHECKPOINT_1 or
LOG_CHECKPOINT_2 */
{
log_group_t* group;
ib_uint64_t max_no;
ib_uint64_t checkpoint_no;
ulint field;
byte* buf;
group = UT_LIST_GET_FIRST(log_sys->log_groups);
max_no = 0;
*max_group = NULL;
*max_field = 0;
buf = log_sys->checkpoint_buf;
while (group) {
group->state = LOG_GROUP_CORRUPTED;
for (field = LOG_CHECKPOINT_1; field <= LOG_CHECKPOINT_2;
field += LOG_CHECKPOINT_2 - LOG_CHECKPOINT_1) {
log_group_read_checkpoint_info(group, field);
if (!recv_check_cp_is_consistent(buf)) {
#ifdef UNIV_DEBUG
if (log_debug_writes) {
fprintf(stderr,
"InnoDB: Checkpoint in group"
" %lu at %lu invalid, %lu\n",
(ulong) group->id,
(ulong) field,
(ulong) mach_read_from_4(
buf
+ LOG_CHECKPOINT_CHECKSUM_1));
}
#endif /* UNIV_DEBUG */
goto not_consistent;
}
group->state = LOG_GROUP_OK;
group->lsn = mach_read_from_8(
buf + LOG_CHECKPOINT_LSN);
group->lsn_offset = mach_read_from_4(
buf + LOG_CHECKPOINT_OFFSET_LOW32);
group->lsn_offset |= ((lsn_t) mach_read_from_4(
buf + LOG_CHECKPOINT_OFFSET_HIGH32)) << 32;
checkpoint_no = mach_read_from_8(
buf + LOG_CHECKPOINT_NO);
#ifdef UNIV_DEBUG
if (log_debug_writes) {
fprintf(stderr,
"InnoDB: Checkpoint number %lu"
" found in group %lu\n",
(ulong) checkpoint_no,
(ulong) group->id);
}
#endif /* UNIV_DEBUG */
if (checkpoint_no >= max_no) {
*max_group = group;
*max_field = field;
max_no = checkpoint_no;
}
not_consistent:
;
}
group = UT_LIST_GET_NEXT(log_groups, group);
}
if (*max_group == NULL) {
fprintf(stderr,
"InnoDB: No valid checkpoint found.\n"
"InnoDB: If this error appears when you are"
" creating an InnoDB database,\n"
"InnoDB: the problem may be that during"
" an earlier attempt you managed\n"
"InnoDB: to create the InnoDB data files,"
" but log file creation failed.\n"
"InnoDB: If that is the case, please refer to\n"
"InnoDB: " REFMAN "error-creating-innodb.html\n");
return(DB_ERROR);
}
return(DB_SUCCESS);
}
#else /* !UNIV_HOTBACKUP */
/*******************************************************************//**
Reads the checkpoint info needed in hot backup.
@return TRUE if success */
UNIV_INTERN
ibool
recv_read_checkpoint_info_for_backup(
/*=================================*/
const byte* hdr, /*!< in: buffer containing the log group
header */
lsn_t* lsn, /*!< out: checkpoint lsn */
lsn_t* offset, /*!< out: checkpoint offset in the log group */
lsn_t* cp_no, /*!< out: checkpoint number */
lsn_t* first_header_lsn)
/*!< out: lsn of of the start of the
first log file */
{
ulint max_cp = 0;
ib_uint64_t max_cp_no = 0;
const byte* cp_buf;
cp_buf = hdr + LOG_CHECKPOINT_1;
if (recv_check_cp_is_consistent(cp_buf)) {
max_cp_no = mach_read_from_8(cp_buf + LOG_CHECKPOINT_NO);
max_cp = LOG_CHECKPOINT_1;
}
cp_buf = hdr + LOG_CHECKPOINT_2;
if (recv_check_cp_is_consistent(cp_buf)) {
if (mach_read_from_8(cp_buf + LOG_CHECKPOINT_NO) > max_cp_no) {
max_cp = LOG_CHECKPOINT_2;
}
}
if (max_cp == 0) {
return(FALSE);
}
cp_buf = hdr + max_cp;
*lsn = mach_read_from_8(cp_buf + LOG_CHECKPOINT_LSN);
*offset = mach_read_from_4(
cp_buf + LOG_CHECKPOINT_OFFSET_LOW32);
*offset |= ((lsn_t) mach_read_from_4(
cp_buf + LOG_CHECKPOINT_OFFSET_HIGH32)) << 32;
*cp_no = mach_read_from_8(cp_buf + LOG_CHECKPOINT_NO);
*first_header_lsn = mach_read_from_8(hdr + LOG_FILE_START_LSN);
return(TRUE);
}
#endif /* !UNIV_HOTBACKUP */
/******************************************************//**
Checks the 4-byte checksum to the trailer checksum field of a log
block. We also accept a log block in the old format before
InnoDB-3.23.52 where the checksum field contains the log block number.
@return TRUE if ok, or if the log block may be in the format of InnoDB
version predating 3.23.52 */
static
ibool
log_block_checksum_is_ok_or_old_format(
/*===================================*/
const byte* block) /*!< in: pointer to a log block */
{
#ifdef UNIV_LOG_DEBUG
return(TRUE);
#endif /* UNIV_LOG_DEBUG */
if (log_block_calc_checksum(block) == log_block_get_checksum(block)) {
return(TRUE);
}
if (log_block_get_hdr_no(block) == log_block_get_checksum(block)) {
/* We assume the log block is in the format of
InnoDB version < 3.23.52 and the block is ok */
#if 0
fprintf(stderr,
"InnoDB: Scanned old format < InnoDB-3.23.52"
" log block number %lu\n",
log_block_get_hdr_no(block));
#endif
return(TRUE);
}
return(FALSE);
}
#ifdef UNIV_HOTBACKUP
/*******************************************************************//**
Scans the log segment and n_bytes_scanned is set to the length of valid
log scanned. */
UNIV_INTERN
void
recv_scan_log_seg_for_backup(
/*=========================*/
byte* buf, /*!< in: buffer containing log data */
ulint buf_len, /*!< in: data length in that buffer */
lsn_t* scanned_lsn, /*!< in/out: lsn of buffer start,
we return scanned lsn */
ulint* scanned_checkpoint_no,
/*!< in/out: 4 lowest bytes of the
highest scanned checkpoint number so
far */
ulint* n_bytes_scanned)/*!< out: how much we were able to
scan, smaller than buf_len if log
data ended here */
{
ulint data_len;
byte* log_block;
ulint no;
*n_bytes_scanned = 0;
for (log_block = buf; log_block < buf + buf_len;
log_block += OS_FILE_LOG_BLOCK_SIZE) {
no = log_block_get_hdr_no(log_block);
#if 0
fprintf(stderr, "Log block header no %lu\n", no);
#endif
if (no != log_block_convert_lsn_to_no(*scanned_lsn)
|| !log_block_checksum_is_ok_or_old_format(log_block)) {
#if 0
fprintf(stderr,
"Log block n:o %lu, scanned lsn n:o %lu\n",
no, log_block_convert_lsn_to_no(*scanned_lsn));
#endif
/* Garbage or an incompletely written log block */
log_block += OS_FILE_LOG_BLOCK_SIZE;
#if 0
fprintf(stderr,
"Next log block n:o %lu\n",
log_block_get_hdr_no(log_block));
#endif
break;
}
if (*scanned_checkpoint_no > 0
&& log_block_get_checkpoint_no(log_block)
< *scanned_checkpoint_no
&& *scanned_checkpoint_no
- log_block_get_checkpoint_no(log_block)
> 0x80000000UL) {
/* Garbage from a log buffer flush which was made
before the most recent database recovery */
#if 0
fprintf(stderr,
"Scanned cp n:o %lu, block cp n:o %lu\n",
*scanned_checkpoint_no,
log_block_get_checkpoint_no(log_block));
#endif
break;
}
data_len = log_block_get_data_len(log_block);
*scanned_checkpoint_no
= log_block_get_checkpoint_no(log_block);
*scanned_lsn += data_len;
*n_bytes_scanned += data_len;
if (data_len < OS_FILE_LOG_BLOCK_SIZE) {
/* Log data ends here */
#if 0
fprintf(stderr, "Log block data len %lu\n",
data_len);
#endif
break;
}
}
}
#endif /* UNIV_HOTBACKUP */
/*******************************************************************//**
Tries to parse a single log record body and also applies it to a page if
specified. File ops are parsed, but not applied in this function.
@return log record end, NULL if not a complete record */
static
byte*
recv_parse_or_apply_log_rec_body(
/*=============================*/
byte type, /*!< in: type */
byte* ptr, /*!< in: pointer to a buffer */
byte* end_ptr,/*!< in: pointer to the buffer end */
buf_block_t* block, /*!< in/out: buffer block or NULL; if
not NULL, then the log record is
applied to the page, and the log
record should be complete then */
mtr_t* mtr, /*!< in: mtr or NULL; should be non-NULL
if and only if block is non-NULL */
ulint space_id)
/*!< in: tablespace id obtained by
parsing initial log record */
{
dict_index_t* index = NULL;
page_t* page;
page_zip_des_t* page_zip;
#ifdef UNIV_DEBUG
ulint page_type;
#endif /* UNIV_DEBUG */
ut_ad(!block == !mtr);
if (block) {
page = block->frame;
page_zip = buf_block_get_page_zip(block);
ut_d(page_type = fil_page_get_type(page));
} else {
page = NULL;
page_zip = NULL;
ut_d(page_type = FIL_PAGE_TYPE_ALLOCATED);
}
switch (type) {
#ifdef UNIV_LOG_LSN_DEBUG
case MLOG_LSN:
/* The LSN is checked in recv_parse_log_rec(). */
break;
#endif /* UNIV_LOG_LSN_DEBUG */
case MLOG_1BYTE: case MLOG_2BYTES: case MLOG_4BYTES: case MLOG_8BYTES:
#ifdef UNIV_DEBUG
if (page && page_type == FIL_PAGE_TYPE_ALLOCATED
&& end_ptr >= ptr + 2) {
/* It is OK to set FIL_PAGE_TYPE and certain
list node fields on an empty page. Any other
write is not OK. */
/* NOTE: There may be bogus assertion failures for
dict_hdr_create(), trx_rseg_header_create(),
trx_sys_create_doublewrite_buf(), and
trx_sysf_create().
These are only called during database creation. */
ulint offs = mach_read_from_2(ptr);
switch (type) {
default:
ut_error;
case MLOG_2BYTES:
/* Note that this can fail when the
redo log been written with something
older than InnoDB Plugin 1.0.4. */
ut_ad(offs == FIL_PAGE_TYPE
|| offs == IBUF_TREE_SEG_HEADER
+ IBUF_HEADER + FSEG_HDR_OFFSET
|| offs == PAGE_BTR_IBUF_FREE_LIST
+ PAGE_HEADER + FIL_ADDR_BYTE
|| offs == PAGE_BTR_IBUF_FREE_LIST
+ PAGE_HEADER + FIL_ADDR_BYTE
+ FIL_ADDR_SIZE
|| offs == PAGE_BTR_SEG_LEAF
+ PAGE_HEADER + FSEG_HDR_OFFSET
|| offs == PAGE_BTR_SEG_TOP
+ PAGE_HEADER + FSEG_HDR_OFFSET
|| offs == PAGE_BTR_IBUF_FREE_LIST_NODE
+ PAGE_HEADER + FIL_ADDR_BYTE
+ 0 /*FLST_PREV*/
|| offs == PAGE_BTR_IBUF_FREE_LIST_NODE
+ PAGE_HEADER + FIL_ADDR_BYTE
+ FIL_ADDR_SIZE /*FLST_NEXT*/);
break;
case MLOG_4BYTES:
/* Note that this can fail when the
redo log been written with something
older than InnoDB Plugin 1.0.4. */
ut_ad(0
|| offs == IBUF_TREE_SEG_HEADER
+ IBUF_HEADER + FSEG_HDR_SPACE
|| offs == IBUF_TREE_SEG_HEADER
+ IBUF_HEADER + FSEG_HDR_PAGE_NO
|| offs == PAGE_BTR_IBUF_FREE_LIST
+ PAGE_HEADER/* flst_init */
|| offs == PAGE_BTR_IBUF_FREE_LIST
+ PAGE_HEADER + FIL_ADDR_PAGE
|| offs == PAGE_BTR_IBUF_FREE_LIST
+ PAGE_HEADER + FIL_ADDR_PAGE
+ FIL_ADDR_SIZE
|| offs == PAGE_BTR_SEG_LEAF
+ PAGE_HEADER + FSEG_HDR_PAGE_NO
|| offs == PAGE_BTR_SEG_LEAF
+ PAGE_HEADER + FSEG_HDR_SPACE
|| offs == PAGE_BTR_SEG_TOP
+ PAGE_HEADER + FSEG_HDR_PAGE_NO
|| offs == PAGE_BTR_SEG_TOP
+ PAGE_HEADER + FSEG_HDR_SPACE
|| offs == PAGE_BTR_IBUF_FREE_LIST_NODE
+ PAGE_HEADER + FIL_ADDR_PAGE
+ 0 /*FLST_PREV*/
|| offs == PAGE_BTR_IBUF_FREE_LIST_NODE
+ PAGE_HEADER + FIL_ADDR_PAGE
+ FIL_ADDR_SIZE /*FLST_NEXT*/);
break;
}
}
#endif /* UNIV_DEBUG */
ptr = mlog_parse_nbytes(type, ptr, end_ptr, page, page_zip);
break;
case MLOG_REC_INSERT: case MLOG_COMP_REC_INSERT:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_REC_INSERT,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = page_cur_parse_insert_rec(FALSE, ptr, end_ptr,
block, index, mtr);
}
break;
case MLOG_REC_CLUST_DELETE_MARK: case MLOG_COMP_REC_CLUST_DELETE_MARK:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_REC_CLUST_DELETE_MARK,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = btr_cur_parse_del_mark_set_clust_rec(
ptr, end_ptr, page, page_zip, index);
}
break;
case MLOG_COMP_REC_SEC_DELETE_MARK:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
/* This log record type is obsolete, but we process it for
backward compatibility with MySQL 5.0.3 and 5.0.4. */
ut_a(!page || page_is_comp(page));
ut_a(!page_zip);
ptr = mlog_parse_index(ptr, end_ptr, TRUE, &index);
if (!ptr) {
break;
}
/* Fall through */
case MLOG_REC_SEC_DELETE_MARK:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
ptr = btr_cur_parse_del_mark_set_sec_rec(ptr, end_ptr,
page, page_zip);
break;
case MLOG_REC_UPDATE_IN_PLACE: case MLOG_COMP_REC_UPDATE_IN_PLACE:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_REC_UPDATE_IN_PLACE,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = btr_cur_parse_update_in_place(ptr, end_ptr, page,
page_zip, index);
}
break;
case MLOG_LIST_END_DELETE: case MLOG_COMP_LIST_END_DELETE:
case MLOG_LIST_START_DELETE: case MLOG_COMP_LIST_START_DELETE:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_LIST_END_DELETE
|| type == MLOG_COMP_LIST_START_DELETE,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = page_parse_delete_rec_list(type, ptr, end_ptr,
block, index, mtr);
}
break;
case MLOG_LIST_END_COPY_CREATED: case MLOG_COMP_LIST_END_COPY_CREATED:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_LIST_END_COPY_CREATED,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = page_parse_copy_rec_list_to_created_page(
ptr, end_ptr, block, index, mtr);
}
break;
case MLOG_PAGE_REORGANIZE:
case MLOG_COMP_PAGE_REORGANIZE:
case MLOG_ZIP_PAGE_REORGANIZE:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type != MLOG_PAGE_REORGANIZE,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = btr_parse_page_reorganize(
ptr, end_ptr, index,
type == MLOG_ZIP_PAGE_REORGANIZE,
block, mtr);
}
break;
case MLOG_PAGE_CREATE: case MLOG_COMP_PAGE_CREATE:
/* Allow anything in page_type when creating a page. */
ut_a(!page_zip);
ptr = page_parse_create(ptr, end_ptr,
type == MLOG_COMP_PAGE_CREATE,
block, mtr);
break;
case MLOG_UNDO_INSERT:
ut_ad(!page || page_type == FIL_PAGE_UNDO_LOG);
ptr = trx_undo_parse_add_undo_rec(ptr, end_ptr, page);
break;
case MLOG_UNDO_ERASE_END:
ut_ad(!page || page_type == FIL_PAGE_UNDO_LOG);
ptr = trx_undo_parse_erase_page_end(ptr, end_ptr, page, mtr);
break;
case MLOG_UNDO_INIT:
/* Allow anything in page_type when creating a page. */
ptr = trx_undo_parse_page_init(ptr, end_ptr, page, mtr);
break;
case MLOG_UNDO_HDR_DISCARD:
ut_ad(!page || page_type == FIL_PAGE_UNDO_LOG);
ptr = trx_undo_parse_discard_latest(ptr, end_ptr, page, mtr);
break;
case MLOG_UNDO_HDR_CREATE:
case MLOG_UNDO_HDR_REUSE:
ut_ad(!page || page_type == FIL_PAGE_UNDO_LOG);
ptr = trx_undo_parse_page_header(type, ptr, end_ptr,
page, mtr);
break;
case MLOG_REC_MIN_MARK: case MLOG_COMP_REC_MIN_MARK:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
/* On a compressed page, MLOG_COMP_REC_MIN_MARK
will be followed by MLOG_COMP_REC_DELETE
or MLOG_ZIP_WRITE_HEADER(FIL_PAGE_PREV, FIL_NULL)
in the same mini-transaction. */
ut_a(type == MLOG_COMP_REC_MIN_MARK || !page_zip);
ptr = btr_parse_set_min_rec_mark(
ptr, end_ptr, type == MLOG_COMP_REC_MIN_MARK,
page, mtr);
break;
case MLOG_REC_DELETE: case MLOG_COMP_REC_DELETE:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr,
type == MLOG_COMP_REC_DELETE,
&index))) {
ut_a(!page
|| (ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table));
ptr = page_cur_parse_delete_rec(ptr, end_ptr,
block, index, mtr);
}
break;
case MLOG_IBUF_BITMAP_INIT:
/* Allow anything in page_type when creating a page. */
ptr = ibuf_parse_bitmap_init(ptr, end_ptr, block, mtr);
break;
case MLOG_INIT_FILE_PAGE:
/* Allow anything in page_type when creating a page. */
ptr = fsp_parse_init_file_page(ptr, end_ptr, block);
break;
case MLOG_WRITE_STRING:
ut_ad(!page || page_type != FIL_PAGE_TYPE_ALLOCATED);
ptr = mlog_parse_string(ptr, end_ptr, page, page_zip);
break;
case MLOG_FILE_RENAME:
/* Do not rerun file-based log entries if this is
IO completion from a page read. */
if (page == NULL) {
ptr = fil_op_log_parse_or_replay(ptr, end_ptr, type,
space_id, 0);
}
break;
case MLOG_FILE_CREATE:
case MLOG_FILE_DELETE:
case MLOG_FILE_CREATE2:
/* Do not rerun file-based log entries if this is
IO completion from a page read. */
if (page == NULL) {
ptr = fil_op_log_parse_or_replay(ptr, end_ptr,
type, 0, 0);
}
break;
case MLOG_ZIP_WRITE_NODE_PTR:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
ptr = page_zip_parse_write_node_ptr(ptr, end_ptr,
page, page_zip);
break;
case MLOG_ZIP_WRITE_BLOB_PTR:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
ptr = page_zip_parse_write_blob_ptr(ptr, end_ptr,
page, page_zip);
break;
case MLOG_ZIP_WRITE_HEADER:
ut_ad(!page || page_type == FIL_PAGE_INDEX);
ptr = page_zip_parse_write_header(ptr, end_ptr,
page, page_zip);
break;
case MLOG_ZIP_PAGE_COMPRESS:
/* Allow anything in page_type when creating a page. */
ptr = page_zip_parse_compress(ptr, end_ptr,
page, page_zip);
break;
case MLOG_ZIP_PAGE_COMPRESS_NO_DATA:
if (NULL != (ptr = mlog_parse_index(
ptr, end_ptr, TRUE, &index))) {
ut_a(!page || ((ibool)!!page_is_comp(page)
== dict_table_is_comp(index->table)));
ptr = page_zip_parse_compress_no_data(
ptr, end_ptr, page, page_zip, index);
}
break;
default:
ptr = NULL;
recv_sys->found_corrupt_log = TRUE;
}
if (index) {
dict_table_t* table = index->table;
dict_mem_index_free(index);
dict_mem_table_free(table);
}
return(ptr);
}
/*********************************************************************//**
Calculates the fold value of a page file address: used in inserting or
searching for a log record in the hash table.
@return folded value */
UNIV_INLINE
ulint
recv_fold(
/*======*/
ulint space, /*!< in: space */
ulint page_no)/*!< in: page number */
{
return(ut_fold_ulint_pair(space, page_no));
}
/*********************************************************************//**
Calculates the hash value of a page file address: used in inserting or
searching for a log record in the hash table.
@return folded value */
UNIV_INLINE
ulint
recv_hash(
/*======*/
ulint space, /*!< in: space */
ulint page_no)/*!< in: page number */
{
return(hash_calc_hash(recv_fold(space, page_no), recv_sys->addr_hash));
}
/*********************************************************************//**
Gets the hashed file address struct for a page.
@return file address struct, NULL if not found from the hash table */
static
recv_addr_t*
recv_get_fil_addr_struct(
/*=====================*/
ulint space, /*!< in: space id */
ulint page_no)/*!< in: page number */
{
recv_addr_t* recv_addr;
for (recv_addr = static_cast<recv_addr_t*>(
HASH_GET_FIRST(recv_sys->addr_hash,
recv_hash(space, page_no)));
recv_addr != 0;
recv_addr = static_cast<recv_addr_t*>(
HASH_GET_NEXT(addr_hash, recv_addr))) {
if (recv_addr->space == space
&& recv_addr->page_no == page_no) {
return(recv_addr);
}
}
return(NULL);
}
/*******************************************************************//**
Adds a new log record to the hash table of log records. */
static
void
recv_add_to_hash_table(
/*===================*/
byte type, /*!< in: log record type */
ulint space, /*!< in: space id */
ulint page_no, /*!< in: page number */
byte* body, /*!< in: log record body */
byte* rec_end, /*!< in: log record end */
lsn_t start_lsn, /*!< in: start lsn of the mtr */
lsn_t end_lsn) /*!< in: end lsn of the mtr */
{
recv_t* recv;
ulint len;
recv_data_t* recv_data;
recv_data_t** prev_field;
recv_addr_t* recv_addr;
if (fil_tablespace_deleted_or_being_deleted_in_mem(space, -1)) {
/* The tablespace does not exist any more: do not store the
log record */
return;
}
len = rec_end - body;
recv = static_cast<recv_t*>(
mem_heap_alloc(recv_sys->heap, sizeof(recv_t)));
recv->type = type;
recv->len = rec_end - body;
recv->start_lsn = start_lsn;
recv->end_lsn = end_lsn;
recv_addr = recv_get_fil_addr_struct(space, page_no);
if (recv_addr == NULL) {
recv_addr = static_cast<recv_addr_t*>(
mem_heap_alloc(recv_sys->heap, sizeof(recv_addr_t)));
recv_addr->space = space;
recv_addr->page_no = page_no;
recv_addr->state = RECV_NOT_PROCESSED;
UT_LIST_INIT(recv_addr->rec_list);
HASH_INSERT(recv_addr_t, addr_hash, recv_sys->addr_hash,
recv_fold(space, page_no), recv_addr);
recv_sys->n_addrs++;
#if 0
fprintf(stderr, "Inserting log rec for space %lu, page %lu\n",
space, page_no);
#endif
}
UT_LIST_ADD_LAST(rec_list, recv_addr->rec_list, recv);
prev_field = &(recv->data);
/* Store the log record body in chunks of less than UNIV_PAGE_SIZE:
recv_sys->heap grows into the buffer pool, and bigger chunks could not
be allocated */
while (rec_end > body) {
len = rec_end - body;
if (len > RECV_DATA_BLOCK_SIZE) {
len = RECV_DATA_BLOCK_SIZE;
}
recv_data = static_cast<recv_data_t*>(
mem_heap_alloc(recv_sys->heap,
sizeof(recv_data_t) + len));
*prev_field = recv_data;
memcpy(recv_data + 1, body, len);
prev_field = &(recv_data->next);
body += len;
}
*prev_field = NULL;
}
/*********************************************************************//**
Copies the log record body from recv to buf. */
static
void
recv_data_copy_to_buf(
/*==================*/
byte* buf, /*!< in: buffer of length at least recv->len */
recv_t* recv) /*!< in: log record */
{
recv_data_t* recv_data;
ulint part_len;
ulint len;
len = recv->len;
recv_data = recv->data;
while (len > 0) {
if (len > RECV_DATA_BLOCK_SIZE) {
part_len = RECV_DATA_BLOCK_SIZE;
} else {
part_len = len;
}
ut_memcpy(buf, ((byte*) recv_data) + sizeof(recv_data_t),
part_len);
buf += part_len;
len -= part_len;
recv_data = recv_data->next;
}
}
/************************************************************************//**
Applies the hashed log records to the page, if the page lsn is less than the
lsn of a log record. This can be called when a buffer page has just been
read in, or also for a page already in the buffer pool. */
UNIV_INTERN
void
recv_recover_page_func(
/*===================*/
#ifndef UNIV_HOTBACKUP
ibool just_read_in,
/*!< in: TRUE if the i/o handler calls
this for a freshly read page */
#endif /* !UNIV_HOTBACKUP */
buf_block_t* block) /*!< in/out: buffer block */
{
page_t* page;
page_zip_des_t* page_zip;
recv_addr_t* recv_addr;
recv_t* recv;
byte* buf;
lsn_t start_lsn;
lsn_t end_lsn;
lsn_t page_lsn;
lsn_t page_newest_lsn;
ibool modification_to_page;
#ifndef UNIV_HOTBACKUP
ibool success;
#endif /* !UNIV_HOTBACKUP */
mtr_t mtr;
mutex_enter(&(recv_sys->mutex));
if (recv_sys->apply_log_recs == FALSE) {
/* Log records should not be applied now */
mutex_exit(&(recv_sys->mutex));
return;
}
recv_addr = recv_get_fil_addr_struct(buf_block_get_space(block),
buf_block_get_page_no(block));
if ((recv_addr == NULL)
|| (recv_addr->state == RECV_BEING_PROCESSED)
|| (recv_addr->state == RECV_PROCESSED)) {
mutex_exit(&(recv_sys->mutex));
return;
}
#if 0
fprintf(stderr, "Recovering space %lu, page %lu\n",
buf_block_get_space(block), buf_block_get_page_no(block));
#endif
recv_addr->state = RECV_BEING_PROCESSED;
mutex_exit(&(recv_sys->mutex));
mtr_start(&mtr);
mtr_set_log_mode(&mtr, MTR_LOG_NONE);
page = block->frame;
page_zip = buf_block_get_page_zip(block);
#ifndef UNIV_HOTBACKUP
if (just_read_in) {
/* Move the ownership of the x-latch on the page to
this OS thread, so that we can acquire a second
x-latch on it. This is needed for the operations to
the page to pass the debug checks. */
rw_lock_x_lock_move_ownership(&block->lock);
}
success = buf_page_get_known_nowait(RW_X_LATCH, block,
BUF_KEEP_OLD,
__FILE__, __LINE__,
&mtr);
ut_a(success);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
#endif /* !UNIV_HOTBACKUP */
/* Read the newest modification lsn from the page */
page_lsn = mach_read_from_8(page + FIL_PAGE_LSN);
#ifndef UNIV_HOTBACKUP
/* It may be that the page has been modified in the buffer
pool: read the newest modification lsn there */
page_newest_lsn = buf_page_get_newest_modification(&block->page);
if (page_newest_lsn) {
page_lsn = page_newest_lsn;
}
#else /* !UNIV_HOTBACKUP */
/* In recovery from a backup we do not really use the buffer pool */
page_newest_lsn = 0;
#endif /* !UNIV_HOTBACKUP */
modification_to_page = FALSE;
start_lsn = end_lsn = 0;
recv = UT_LIST_GET_FIRST(recv_addr->rec_list);
while (recv) {
end_lsn = recv->end_lsn;
if (recv->len > RECV_DATA_BLOCK_SIZE) {
/* We have to copy the record body to a separate
buffer */
buf = static_cast<byte*>(mem_alloc(recv->len));
recv_data_copy_to_buf(buf, recv);
} else {
buf = ((byte*)(recv->data)) + sizeof(recv_data_t);
}
if (recv->type == MLOG_INIT_FILE_PAGE) {
page_lsn = page_newest_lsn;
memset(FIL_PAGE_LSN + page, 0, 8);
memset(UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM
+ page, 0, 8);
if (page_zip) {
memset(FIL_PAGE_LSN + page_zip->data, 0, 8);
}
}
if (recv->start_lsn >= page_lsn) {
lsn_t end_lsn;
if (!modification_to_page) {
modification_to_page = TRUE;
start_lsn = recv->start_lsn;
}
DBUG_PRINT("ib_log",
("apply " DBUG_LSN_PF ": %u len %u "
"page %u:%u", recv->start_lsn,
(unsigned) recv->type,
(unsigned) recv->len,
(unsigned) recv_addr->space,
(unsigned) recv_addr->page_no));
recv_parse_or_apply_log_rec_body(recv->type, buf,
buf + recv->len,
block, &mtr,
recv_addr->space);
end_lsn = recv->start_lsn + recv->len;
mach_write_to_8(FIL_PAGE_LSN + page, end_lsn);
mach_write_to_8(UNIV_PAGE_SIZE
- FIL_PAGE_END_LSN_OLD_CHKSUM
+ page, end_lsn);
if (page_zip) {
mach_write_to_8(FIL_PAGE_LSN
+ page_zip->data, end_lsn);
}
}
if (recv->len > RECV_DATA_BLOCK_SIZE) {
mem_free(buf);
}
recv = UT_LIST_GET_NEXT(rec_list, recv);
}
#ifdef UNIV_ZIP_DEBUG
if (fil_page_get_type(page) == FIL_PAGE_INDEX) {
page_zip_des_t* page_zip = buf_block_get_page_zip(block);
ut_a(!page_zip
|| page_zip_validate_low(page_zip, page, NULL, FALSE));
}
#endif /* UNIV_ZIP_DEBUG */
#ifndef UNIV_HOTBACKUP
if (modification_to_page) {
ut_a(block);
log_flush_order_mutex_enter();
buf_flush_recv_note_modification(block, start_lsn, end_lsn);
log_flush_order_mutex_exit();
}
#endif /* !UNIV_HOTBACKUP */
/* Make sure that committing mtr does not change the modification
lsn values of page */
mtr.modifications = FALSE;
mtr_commit(&mtr);
mutex_enter(&(recv_sys->mutex));
if (recv_max_page_lsn < page_lsn) {
recv_max_page_lsn = page_lsn;
}
recv_addr->state = RECV_PROCESSED;
ut_a(recv_sys->n_addrs);
recv_sys->n_addrs--;
mutex_exit(&(recv_sys->mutex));
}
#ifndef UNIV_HOTBACKUP
/*******************************************************************//**
Reads in pages which have hashed log records, from an area around a given
page number.
@return number of pages found */
static
ulint
recv_read_in_area(
/*==============*/
ulint space, /*!< in: space */
ulint zip_size,/*!< in: compressed page size in bytes, or 0 */
ulint page_no)/*!< in: page number */
{
recv_addr_t* recv_addr;
ulint page_nos[RECV_READ_AHEAD_AREA];
ulint low_limit;
ulint n;
low_limit = page_no - (page_no % RECV_READ_AHEAD_AREA);
n = 0;
for (page_no = low_limit; page_no < low_limit + RECV_READ_AHEAD_AREA;
page_no++) {
recv_addr = recv_get_fil_addr_struct(space, page_no);
if (recv_addr && !buf_page_peek(space, page_no)) {
mutex_enter(&(recv_sys->mutex));
if (recv_addr->state == RECV_NOT_PROCESSED) {
recv_addr->state = RECV_BEING_READ;
page_nos[n] = page_no;
n++;
}
mutex_exit(&(recv_sys->mutex));
}
}
buf_read_recv_pages(FALSE, space, zip_size, page_nos, n);
/*
fprintf(stderr, "Recv pages at %lu n %lu\n", page_nos[0], n);
*/
return(n);
}
/*******************************************************************//**
Empties the hash table of stored log records, applying them to appropriate
pages. */
UNIV_INTERN
void
recv_apply_hashed_log_recs(
/*=======================*/
ibool allow_ibuf) /*!< in: if TRUE, also ibuf operations are
allowed during the application; if FALSE,
no ibuf operations are allowed, and after
the application all file pages are flushed to
disk and invalidated in buffer pool: this
alternative means that no new log records
can be generated during the application;
the caller must in this case own the log
mutex */
{
recv_addr_t* recv_addr;
ulint i;
ibool has_printed = FALSE;
mtr_t mtr;
loop:
mutex_enter(&(recv_sys->mutex));
if (recv_sys->apply_batch_on) {
mutex_exit(&(recv_sys->mutex));
os_thread_sleep(500000);
goto loop;
}
ut_ad(!allow_ibuf == mutex_own(&log_sys->mutex));
if (!allow_ibuf) {
recv_no_ibuf_operations = TRUE;
}
recv_sys->apply_log_recs = TRUE;
recv_sys->apply_batch_on = TRUE;
for (i = 0; i < hash_get_n_cells(recv_sys->addr_hash); i++) {
for (recv_addr = static_cast<recv_addr_t*>(
HASH_GET_FIRST(recv_sys->addr_hash, i));
recv_addr != 0;
recv_addr = static_cast<recv_addr_t*>(
HASH_GET_NEXT(addr_hash, recv_addr))) {
ulint space = recv_addr->space;
ulint zip_size = fil_space_get_zip_size(space);
ulint page_no = recv_addr->page_no;
if (recv_addr->state == RECV_NOT_PROCESSED) {
if (!has_printed) {
ib_logf(IB_LOG_LEVEL_INFO,
"Starting an apply batch"
" of log records"
" to the database...");
fputs("InnoDB: Progress in percent: ",
stderr);
has_printed = TRUE;
}
mutex_exit(&(recv_sys->mutex));
if (buf_page_peek(space, page_no)) {
buf_block_t* block;
mtr_start(&mtr);
block = buf_page_get(
space, zip_size, page_no,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(
block, SYNC_NO_ORDER_CHECK);
recv_recover_page(FALSE, block);
mtr_commit(&mtr);
} else {
recv_read_in_area(space, zip_size,
page_no);
}
mutex_enter(&(recv_sys->mutex));
}
}
if (has_printed
&& (i * 100) / hash_get_n_cells(recv_sys->addr_hash)
!= ((i + 1) * 100)
/ hash_get_n_cells(recv_sys->addr_hash)) {
fprintf(stderr, "%lu ", (ulong)
((i * 100)
/ hash_get_n_cells(recv_sys->addr_hash)));
}
}
/* Wait until all the pages have been processed */
while (recv_sys->n_addrs != 0) {
mutex_exit(&(recv_sys->mutex));
os_thread_sleep(500000);
mutex_enter(&(recv_sys->mutex));
}
if (has_printed) {
fprintf(stderr, "\n");
}
if (!allow_ibuf) {
bool success;
/* Flush all the file pages to disk and invalidate them in
the buffer pool */
ut_d(recv_no_log_write = TRUE);
mutex_exit(&(recv_sys->mutex));
mutex_exit(&(log_sys->mutex));
/* Stop the recv_writer thread from issuing any LRU
flush batches. */
mutex_enter(&recv_sys->writer_mutex);
/* Wait for any currently run batch to end. */
buf_flush_wait_LRU_batch_end();
success = buf_flush_list(ULINT_MAX, LSN_MAX, NULL);
ut_a(success);
buf_flush_wait_batch_end(NULL, BUF_FLUSH_LIST);
buf_pool_invalidate();
/* Allow batches from recv_writer thread. */
mutex_exit(&recv_sys->writer_mutex);
mutex_enter(&(log_sys->mutex));
mutex_enter(&(recv_sys->mutex));
ut_d(recv_no_log_write = FALSE);
recv_no_ibuf_operations = FALSE;
}
recv_sys->apply_log_recs = FALSE;
recv_sys->apply_batch_on = FALSE;
recv_sys_empty_hash();
if (has_printed) {
fprintf(stderr, "InnoDB: Apply batch completed\n");
}
mutex_exit(&(recv_sys->mutex));
}
#else /* !UNIV_HOTBACKUP */
/*******************************************************************//**
Applies log records in the hash table to a backup. */
UNIV_INTERN
void
recv_apply_log_recs_for_backup(void)
/*================================*/
{
recv_addr_t* recv_addr;
ulint n_hash_cells;
buf_block_t* block;
ulint actual_size;
ibool success;
ulint error;
ulint i;
recv_sys->apply_log_recs = TRUE;
recv_sys->apply_batch_on = TRUE;
block = back_block1;
ib_logf(IB_LOG_LEVEL_INFO,
"Starting an apply batch of log records to the database...");
fputs("InnoDB: Progress in percent: ", stderr);
n_hash_cells = hash_get_n_cells(recv_sys->addr_hash);
for (i = 0; i < n_hash_cells; i++) {
/* The address hash table is externally chained */
recv_addr = hash_get_nth_cell(recv_sys->addr_hash, i)->node;
while (recv_addr != NULL) {
ulint zip_size
= fil_space_get_zip_size(recv_addr->space);
if (zip_size == ULINT_UNDEFINED) {
#if 0
fprintf(stderr,
"InnoDB: Warning: cannot apply"
" log record to"
" tablespace %lu page %lu,\n"
"InnoDB: because tablespace with"
" that id does not exist.\n",
recv_addr->space, recv_addr->page_no);
#endif
recv_addr->state = RECV_PROCESSED;
ut_a(recv_sys->n_addrs);
recv_sys->n_addrs--;
goto skip_this_recv_addr;
}
/* We simulate a page read made by the buffer pool, to
make sure the recovery apparatus works ok. We must init
the block. */
buf_page_init_for_backup_restore(
recv_addr->space, recv_addr->page_no,
zip_size, block);
/* Extend the tablespace's last file if the page_no
does not fall inside its bounds; we assume the last
file is auto-extending, and mysqlbackup copied the file
when it still was smaller */
success = fil_extend_space_to_desired_size(
&actual_size,
recv_addr->space, recv_addr->page_no + 1);
if (!success) {
fprintf(stderr,
"InnoDB: Fatal error: cannot extend"
" tablespace %u to hold %u pages\n",
recv_addr->space, recv_addr->page_no);
exit(1);
}
/* Read the page from the tablespace file using the
fil0fil.cc routines */
if (zip_size) {
error = fil_io(OS_FILE_READ, true,
recv_addr->space, zip_size,
recv_addr->page_no, 0, zip_size,
block->page.zip.data, NULL, 0);
if (error == DB_SUCCESS
&& !buf_zip_decompress(block, TRUE)) {
exit(1);
}
} else {
error = fil_io(OS_FILE_READ, true,
recv_addr->space, 0,
recv_addr->page_no, 0,
UNIV_PAGE_SIZE,
block->frame, NULL, 0);
}
if (error != DB_SUCCESS) {
fprintf(stderr,
"InnoDB: Fatal error: cannot read"
" from tablespace"
" %lu page number %lu\n",
(ulong) recv_addr->space,
(ulong) recv_addr->page_no);
exit(1);
}
/* Apply the log records to this page */
recv_recover_page(FALSE, block);
/* Write the page back to the tablespace file using the
fil0fil.cc routines */
buf_flush_init_for_writing(
block->frame, buf_block_get_page_zip(block),
mach_read_from_8(block->frame + FIL_PAGE_LSN));
if (zip_size) {
error = fil_io(OS_FILE_WRITE, true,
recv_addr->space, zip_size,
recv_addr->page_no, 0,
zip_size,
block->page.zip.data, NULL, 0);
} else {
error = fil_io(OS_FILE_WRITE, true,
recv_addr->space, 0,
recv_addr->page_no, 0,
UNIV_PAGE_SIZE,
block->frame, NULL, 0);
}
skip_this_recv_addr:
recv_addr = HASH_GET_NEXT(addr_hash, recv_addr);
}
if ((100 * i) / n_hash_cells
!= (100 * (i + 1)) / n_hash_cells) {
fprintf(stderr, "%lu ",
(ulong) ((100 * i) / n_hash_cells));
fflush(stderr);
}
}
recv_sys_empty_hash();
}
#endif /* !UNIV_HOTBACKUP */
/*******************************************************************//**
Tries to parse a single log record and returns its length.
@return length of the record, or 0 if the record was not complete */
static
ulint
recv_parse_log_rec(
/*===============*/
byte* ptr, /*!< in: pointer to a buffer */
byte* end_ptr,/*!< in: pointer to the buffer end */
byte* type, /*!< out: type */
ulint* space, /*!< out: space id */
ulint* page_no,/*!< out: page number */
byte** body) /*!< out: log record body start */
{
byte* new_ptr;
*body = NULL;
if (ptr == end_ptr) {
return(0);
}
if (*ptr == MLOG_MULTI_REC_END) {
*type = *ptr;
return(1);
}
if (*ptr == MLOG_DUMMY_RECORD) {
*type = *ptr;
*space = ULINT_UNDEFINED - 1; /* For debugging */
return(1);
}
new_ptr = mlog_parse_initial_log_record(ptr, end_ptr, type, space,
page_no);
*body = new_ptr;
if (UNIV_UNLIKELY(!new_ptr)) {
return(0);
}
#ifdef UNIV_LOG_LSN_DEBUG
if (*type == MLOG_LSN) {
lsn_t lsn = (lsn_t) *space << 32 | *page_no;
# ifdef UNIV_LOG_DEBUG
ut_a(lsn == log_sys->old_lsn);
# else /* UNIV_LOG_DEBUG */
ut_a(lsn == recv_sys->recovered_lsn);
# endif /* UNIV_LOG_DEBUG */
}
#endif /* UNIV_LOG_LSN_DEBUG */
new_ptr = recv_parse_or_apply_log_rec_body(*type, new_ptr, end_ptr,
NULL, NULL, *space);
if (UNIV_UNLIKELY(new_ptr == NULL)) {
return(0);
}
if (*page_no > recv_max_parsed_page_no) {
recv_max_parsed_page_no = *page_no;
}
return(new_ptr - ptr);
}
/*******************************************************//**
Calculates the new value for lsn when more data is added to the log. */
static
lsn_t
recv_calc_lsn_on_data_add(
/*======================*/
lsn_t lsn, /*!< in: old lsn */
ib_uint64_t len) /*!< in: this many bytes of data is
added, log block headers not included */
{
ulint frag_len;
ib_uint64_t lsn_len;
frag_len = (lsn % OS_FILE_LOG_BLOCK_SIZE) - LOG_BLOCK_HDR_SIZE;
ut_ad(frag_len < OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_HDR_SIZE
- LOG_BLOCK_TRL_SIZE);
lsn_len = len;
lsn_len += (lsn_len + frag_len)
/ (OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_HDR_SIZE
- LOG_BLOCK_TRL_SIZE)
* (LOG_BLOCK_HDR_SIZE + LOG_BLOCK_TRL_SIZE);
return(lsn + lsn_len);
}
#ifdef UNIV_LOG_DEBUG
/*******************************************************//**
Checks that the parser recognizes incomplete initial segments of a log
record as incomplete. */
static
void
recv_check_incomplete_log_recs(
/*===========================*/
byte* ptr, /*!< in: pointer to a complete log record */
ulint len) /*!< in: length of the log record */
{
ulint i;
byte type;
ulint space;
ulint page_no;
byte* body;
for (i = 0; i < len; i++) {
ut_a(0 == recv_parse_log_rec(ptr, ptr + i, &type, &space,
&page_no, &body));
}
}
#endif /* UNIV_LOG_DEBUG */
/*******************************************************//**
Prints diagnostic info of corrupt log. */
static
void
recv_report_corrupt_log(
/*====================*/
byte* ptr, /*!< in: pointer to corrupt log record */
byte type, /*!< in: type of the record */
ulint space, /*!< in: space id, this may also be garbage */
ulint page_no)/*!< in: page number, this may also be garbage */
{
fprintf(stderr,
"InnoDB: ############### CORRUPT LOG RECORD FOUND\n"
"InnoDB: Log record type %lu, space id %lu, page number %lu\n"
"InnoDB: Log parsing proceeded successfully up to " LSN_PF "\n"
"InnoDB: Previous log record type %lu, is multi %lu\n"
"InnoDB: Recv offset %lu, prev %lu\n",
(ulong) type, (ulong) space, (ulong) page_no,
recv_sys->recovered_lsn,
(ulong) recv_previous_parsed_rec_type,
(ulong) recv_previous_parsed_rec_is_multi,
(ulong) (ptr - recv_sys->buf),
(ulong) recv_previous_parsed_rec_offset);
if ((ulint)(ptr - recv_sys->buf + 100)
> recv_previous_parsed_rec_offset
&& (ulint)(ptr - recv_sys->buf + 100
- recv_previous_parsed_rec_offset)
< 200000) {
fputs("InnoDB: Hex dump of corrupt log starting"
" 100 bytes before the start\n"
"InnoDB: of the previous log rec,\n"
"InnoDB: and ending 100 bytes after the start"
" of the corrupt rec:\n",
stderr);
ut_print_buf(stderr,
recv_sys->buf
+ recv_previous_parsed_rec_offset - 100,
ptr - recv_sys->buf + 200
- recv_previous_parsed_rec_offset);
putc('\n', stderr);
}
#ifndef UNIV_HOTBACKUP
if (!srv_force_recovery) {
fputs("InnoDB: Set innodb_force_recovery"
" to ignore this error.\n", stderr);
ut_error;
}
#endif /* !UNIV_HOTBACKUP */
fputs("InnoDB: WARNING: the log file may have been corrupt and it\n"
"InnoDB: is possible that the log scan did not proceed\n"
"InnoDB: far enough in recovery! Please run CHECK TABLE\n"
"InnoDB: on your InnoDB tables to check that they are ok!\n"
"InnoDB: If mysqld crashes after this recovery, look at\n"
"InnoDB: " REFMAN "forcing-innodb-recovery.html\n"
"InnoDB: about forcing recovery.\n", stderr);
fflush(stderr);
}
/*******************************************************//**
Parses log records from a buffer and stores them to a hash table to wait
merging to file pages.
@return currently always returns FALSE */
static
ibool
recv_parse_log_recs(
/*================*/
ibool store_to_hash) /*!< in: TRUE if the records should be stored
to the hash table; this is set to FALSE if just
debug checking is needed */
{
byte* ptr;
byte* end_ptr;
ulint single_rec;
ulint len;
ulint total_len;
lsn_t new_recovered_lsn;
lsn_t old_lsn;
byte type;
ulint space;
ulint page_no;
byte* body;
ulint n_recs;
ut_ad(mutex_own(&(log_sys->mutex)));
ut_ad(recv_sys->parse_start_lsn != 0);
loop:
ptr = recv_sys->buf + recv_sys->recovered_offset;
end_ptr = recv_sys->buf + recv_sys->len;
if (ptr == end_ptr) {
return(FALSE);
}
single_rec = (ulint)*ptr & MLOG_SINGLE_REC_FLAG;
if (single_rec || *ptr == MLOG_DUMMY_RECORD) {
/* The mtr only modified a single page, or this is a file op */
old_lsn = recv_sys->recovered_lsn;
/* Try to parse a log record, fetching its type, space id,
page no, and a pointer to the body of the log record */
len = recv_parse_log_rec(ptr, end_ptr, &type, &space,
&page_no, &body);
if (len == 0 || recv_sys->found_corrupt_log) {
if (recv_sys->found_corrupt_log) {
recv_report_corrupt_log(ptr,
type, space, page_no);
}
return(FALSE);
}
new_recovered_lsn = recv_calc_lsn_on_data_add(old_lsn, len);
if (new_recovered_lsn > recv_sys->scanned_lsn) {
/* The log record filled a log block, and we require
that also the next log block should have been scanned
in */
return(FALSE);
}
recv_previous_parsed_rec_type = (ulint) type;
recv_previous_parsed_rec_offset = recv_sys->recovered_offset;
recv_previous_parsed_rec_is_multi = 0;
recv_sys->recovered_offset += len;
recv_sys->recovered_lsn = new_recovered_lsn;
DBUG_PRINT("ib_log",
("scan " DBUG_LSN_PF ": log rec %u len %u "
"page %u:%u", old_lsn,
(unsigned) type, (unsigned) len,
(unsigned) space, (unsigned) page_no));
if (type == MLOG_DUMMY_RECORD) {
/* Do nothing */
} else if (!store_to_hash) {
/* In debug checking, update a replicate page
according to the log record, and check that it
becomes identical with the original page */
#ifdef UNIV_LOG_DEBUG
recv_check_incomplete_log_recs(ptr, len);
#endif/* UNIV_LOG_DEBUG */
} else if (type == MLOG_FILE_CREATE
|| type == MLOG_FILE_CREATE2
|| type == MLOG_FILE_RENAME
|| type == MLOG_FILE_DELETE) {
ut_a(space);
#ifdef UNIV_HOTBACKUP
if (recv_replay_file_ops) {
/* In mysqlbackup --apply-log, replay an .ibd
file operation, if possible; note that
fil_path_to_mysql_datadir is set in mysqlbackup
to point to the datadir we should use there */
if (NULL == fil_op_log_parse_or_replay(
body, end_ptr, type,
space, page_no)) {
fprintf(stderr,
"InnoDB: Error: file op"
" log record of type %lu"
" space %lu not complete in\n"
"InnoDB: the replay phase."
" Path %s\n",
(ulint) type, space,
(char*)(body + 2));
ut_error;
}
}
#endif
/* In normal mysqld crash recovery we do not try to
replay file operations */
#ifdef UNIV_LOG_LSN_DEBUG
} else if (type == MLOG_LSN) {
/* Do not add these records to the hash table.
The page number and space id fields are misused
for something else. */
#endif /* UNIV_LOG_LSN_DEBUG */
} else {
recv_add_to_hash_table(type, space, page_no, body,
ptr + len, old_lsn,
recv_sys->recovered_lsn);
}
} else {
/* Check that all the records associated with the single mtr
are included within the buffer */
total_len = 0;
n_recs = 0;
for (;;) {
len = recv_parse_log_rec(ptr, end_ptr, &type, &space,
&page_no, &body);
if (len == 0 || recv_sys->found_corrupt_log) {
if (recv_sys->found_corrupt_log) {
recv_report_corrupt_log(
ptr, type, space, page_no);
}
return(FALSE);
}
recv_previous_parsed_rec_type = (ulint) type;
recv_previous_parsed_rec_offset
= recv_sys->recovered_offset + total_len;
recv_previous_parsed_rec_is_multi = 1;
#ifdef UNIV_LOG_DEBUG
if ((!store_to_hash) && (type != MLOG_MULTI_REC_END)) {
recv_check_incomplete_log_recs(ptr, len);
}
#endif /* UNIV_LOG_DEBUG */
DBUG_PRINT("ib_log",
("scan " DBUG_LSN_PF ": multi-log rec %u "
"len %u page %u:%u",
recv_sys->recovered_lsn,
(unsigned) type, (unsigned) len,
(unsigned) space, (unsigned) page_no));
total_len += len;
n_recs++;
ptr += len;
if (type == MLOG_MULTI_REC_END) {
/* Found the end mark for the records */
break;
}
}
new_recovered_lsn = recv_calc_lsn_on_data_add(
recv_sys->recovered_lsn, total_len);
if (new_recovered_lsn > recv_sys->scanned_lsn) {
/* The log record filled a log block, and we require
that also the next log block should have been scanned
in */
return(FALSE);
}
/* Add all the records to the hash table */
ptr = recv_sys->buf + recv_sys->recovered_offset;
for (;;) {
old_lsn = recv_sys->recovered_lsn;
len = recv_parse_log_rec(ptr, end_ptr, &type, &space,
&page_no, &body);
if (recv_sys->found_corrupt_log) {
recv_report_corrupt_log(ptr,
type, space, page_no);
}
ut_a(len != 0);
ut_a(0 == ((ulint)*ptr & MLOG_SINGLE_REC_FLAG));
recv_sys->recovered_offset += len;
recv_sys->recovered_lsn
= recv_calc_lsn_on_data_add(old_lsn, len);
if (type == MLOG_MULTI_REC_END) {
/* Found the end mark for the records */
break;
}
if (store_to_hash
#ifdef UNIV_LOG_LSN_DEBUG
&& type != MLOG_LSN
#endif /* UNIV_LOG_LSN_DEBUG */
) {
recv_add_to_hash_table(type, space, page_no,
body, ptr + len,
old_lsn,
new_recovered_lsn);
}
ptr += len;
}
}
goto loop;
}
/*******************************************************//**
Adds data from a new log block to the parsing buffer of recv_sys if
recv_sys->parse_start_lsn is non-zero.
@return TRUE if more data added */
static
ibool
recv_sys_add_to_parsing_buf(
/*========================*/
const byte* log_block, /*!< in: log block */
lsn_t scanned_lsn) /*!< in: lsn of how far we were able
to find data in this log block */
{
ulint more_len;
ulint data_len;
ulint start_offset;
ulint end_offset;
ut_ad(scanned_lsn >= recv_sys->scanned_lsn);
if (!recv_sys->parse_start_lsn) {
/* Cannot start parsing yet because no start point for
it found */
return(FALSE);
}
data_len = log_block_get_data_len(log_block);
if (recv_sys->parse_start_lsn >= scanned_lsn) {
return(FALSE);
} else if (recv_sys->scanned_lsn >= scanned_lsn) {
return(FALSE);
} else if (recv_sys->parse_start_lsn > recv_sys->scanned_lsn) {
more_len = (ulint) (scanned_lsn - recv_sys->parse_start_lsn);
} else {
more_len = (ulint) (scanned_lsn - recv_sys->scanned_lsn);
}
if (more_len == 0) {
return(FALSE);
}
ut_ad(data_len >= more_len);
start_offset = data_len - more_len;
if (start_offset < LOG_BLOCK_HDR_SIZE) {
start_offset = LOG_BLOCK_HDR_SIZE;
}
end_offset = data_len;
if (end_offset > OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE) {
end_offset = OS_FILE_LOG_BLOCK_SIZE - LOG_BLOCK_TRL_SIZE;
}
ut_ad(start_offset <= end_offset);
if (start_offset < end_offset) {
ut_memcpy(recv_sys->buf + recv_sys->len,
log_block + start_offset, end_offset - start_offset);
recv_sys->len += end_offset - start_offset;
ut_a(recv_sys->len <= RECV_PARSING_BUF_SIZE);
}
return(TRUE);
}
/*******************************************************//**
Moves the parsing buffer data left to the buffer start. */
static
void
recv_sys_justify_left_parsing_buf(void)
/*===================================*/
{
ut_memmove(recv_sys->buf, recv_sys->buf + recv_sys->recovered_offset,
recv_sys->len - recv_sys->recovered_offset);
recv_sys->len -= recv_sys->recovered_offset;
recv_sys->recovered_offset = 0;
}
/*******************************************************//**
Scans log from a buffer and stores new log data to the parsing buffer.
Parses and hashes the log records if new data found. Unless
UNIV_HOTBACKUP is defined, this function will apply log records
automatically when the hash table becomes full.
@return TRUE if limit_lsn has been reached, or not able to scan any
more in this log group */
UNIV_INTERN
ibool
recv_scan_log_recs(
/*===============*/
ulint available_memory,/*!< in: we let the hash table of recs
to grow to this size, at the maximum */
ibool store_to_hash, /*!< in: TRUE if the records should be
stored to the hash table; this is set
to FALSE if just debug checking is
needed */
const byte* buf, /*!< in: buffer containing a log
segment or garbage */
ulint len, /*!< in: buffer length */
lsn_t start_lsn, /*!< in: buffer start lsn */
lsn_t* contiguous_lsn, /*!< in/out: it is known that all log
groups contain contiguous log data up
to this lsn */
lsn_t* group_scanned_lsn)/*!< out: scanning succeeded up to
this lsn */
{
const byte* log_block;
ulint no;
lsn_t scanned_lsn;
ibool finished;
ulint data_len;
ibool more_data;
ut_ad(start_lsn % OS_FILE_LOG_BLOCK_SIZE == 0);
ut_ad(len % OS_FILE_LOG_BLOCK_SIZE == 0);
ut_ad(len >= OS_FILE_LOG_BLOCK_SIZE);
ut_a(store_to_hash <= TRUE);
finished = FALSE;
log_block = buf;
scanned_lsn = start_lsn;
more_data = FALSE;
do {
no = log_block_get_hdr_no(log_block);
/*
fprintf(stderr, "Log block header no %lu\n", no);
fprintf(stderr, "Scanned lsn no %lu\n",
log_block_convert_lsn_to_no(scanned_lsn));
*/
if (no != log_block_convert_lsn_to_no(scanned_lsn)
|| !log_block_checksum_is_ok_or_old_format(log_block)) {
if (no == log_block_convert_lsn_to_no(scanned_lsn)
&& !log_block_checksum_is_ok_or_old_format(
log_block)) {
fprintf(stderr,
"InnoDB: Log block no %lu at"
" lsn " LSN_PF " has\n"
"InnoDB: ok header, but checksum field"
" contains %lu, should be %lu\n",
(ulong) no,
scanned_lsn,
(ulong) log_block_get_checksum(
log_block),
(ulong) log_block_calc_checksum(
log_block));
}
/* Garbage or an incompletely written log block */
finished = TRUE;
break;
}
if (log_block_get_flush_bit(log_block)) {
/* This block was a start of a log flush operation:
we know that the previous flush operation must have
been completed for all log groups before this block
can have been flushed to any of the groups. Therefore,
we know that log data is contiguous up to scanned_lsn
in all non-corrupt log groups. */
if (scanned_lsn > *contiguous_lsn) {
*contiguous_lsn = scanned_lsn;
}
}
data_len = log_block_get_data_len(log_block);
if ((store_to_hash || (data_len == OS_FILE_LOG_BLOCK_SIZE))
&& scanned_lsn + data_len > recv_sys->scanned_lsn
&& (recv_sys->scanned_checkpoint_no > 0)
&& (log_block_get_checkpoint_no(log_block)
< recv_sys->scanned_checkpoint_no)
&& (recv_sys->scanned_checkpoint_no
- log_block_get_checkpoint_no(log_block)
> 0x80000000UL)) {
/* Garbage from a log buffer flush which was made
before the most recent database recovery */
finished = TRUE;
#ifdef UNIV_LOG_DEBUG
/* This is not really an error, but currently
we stop here in the debug version: */
ut_error;
#endif
break;
}
if (!recv_sys->parse_start_lsn
&& (log_block_get_first_rec_group(log_block) > 0)) {
/* We found a point from which to start the parsing
of log records */
recv_sys->parse_start_lsn = scanned_lsn
+ log_block_get_first_rec_group(log_block);
recv_sys->scanned_lsn = recv_sys->parse_start_lsn;
recv_sys->recovered_lsn = recv_sys->parse_start_lsn;
}
scanned_lsn += data_len;
if (scanned_lsn > recv_sys->scanned_lsn) {
/* We have found more entries. If this scan is
of startup type, we must initiate crash recovery
environment before parsing these log records. */
#ifndef UNIV_HOTBACKUP
if (recv_log_scan_is_startup_type
&& !recv_needed_recovery) {
if (!srv_read_only_mode) {
ib_logf(IB_LOG_LEVEL_INFO,
"Log scan progressed past the "
"checkpoint lsn " LSN_PF "",
recv_sys->scanned_lsn);
recv_init_crash_recovery();
} else {
ib_logf(IB_LOG_LEVEL_WARN,
"Recovery skipped, "
"--innodb-read-only set!");
return(TRUE);
}
}
#endif /* !UNIV_HOTBACKUP */
/* We were able to find more log data: add it to the
parsing buffer if parse_start_lsn is already
non-zero */
if (recv_sys->len + 4 * OS_FILE_LOG_BLOCK_SIZE
>= RECV_PARSING_BUF_SIZE) {
fprintf(stderr,
"InnoDB: Error: log parsing"
" buffer overflow."
" Recovery may have failed!\n");
recv_sys->found_corrupt_log = TRUE;
#ifndef UNIV_HOTBACKUP
if (!srv_force_recovery) {
fputs("InnoDB: Set"
" innodb_force_recovery"
" to ignore this error.\n",
stderr);
ut_error;
}
#endif /* !UNIV_HOTBACKUP */
} else if (!recv_sys->found_corrupt_log) {
more_data = recv_sys_add_to_parsing_buf(
log_block, scanned_lsn);
}
recv_sys->scanned_lsn = scanned_lsn;
recv_sys->scanned_checkpoint_no
= log_block_get_checkpoint_no(log_block);
}
if (data_len < OS_FILE_LOG_BLOCK_SIZE) {
/* Log data for this group ends here */
finished = TRUE;
break;
} else {
log_block += OS_FILE_LOG_BLOCK_SIZE;
}
} while (log_block < buf + len && !finished);
*group_scanned_lsn = scanned_lsn;
if (recv_needed_recovery
|| (recv_is_from_backup && !recv_is_making_a_backup)) {
recv_scan_print_counter++;
if (finished || (recv_scan_print_counter % 80 == 0)) {
fprintf(stderr,
"InnoDB: Doing recovery: scanned up to"
" log sequence number " LSN_PF "\n",
*group_scanned_lsn);
}
}
if (more_data && !recv_sys->found_corrupt_log) {
/* Try to parse more log records */
recv_parse_log_recs(store_to_hash);
#ifndef UNIV_HOTBACKUP
if (store_to_hash
&& mem_heap_get_size(recv_sys->heap) > available_memory) {
/* Hash table of log records has grown too big:
empty it; FALSE means no ibuf operations
allowed, as we cannot add new records to the
log yet: they would be produced by ibuf
operations */
recv_apply_hashed_log_recs(FALSE);
}
#endif /* !UNIV_HOTBACKUP */
if (recv_sys->recovered_offset > RECV_PARSING_BUF_SIZE / 4) {
/* Move parsing buffer data to the buffer start */
recv_sys_justify_left_parsing_buf();
}
}
return(finished);
}
#ifndef UNIV_HOTBACKUP
/*******************************************************//**
Scans log from a buffer and stores new log data to the parsing buffer. Parses
and hashes the log records if new data found. */
static
void
recv_group_scan_log_recs(
/*=====================*/
log_group_t* group, /*!< in: log group */
lsn_t* contiguous_lsn, /*!< in/out: it is known that all log
groups contain contiguous log data up
to this lsn */
lsn_t* group_scanned_lsn)/*!< out: scanning succeeded up to
this lsn */
{
ibool finished;
lsn_t start_lsn;
lsn_t end_lsn;
finished = FALSE;
start_lsn = *contiguous_lsn;
while (!finished) {
end_lsn = start_lsn + RECV_SCAN_SIZE;
log_group_read_log_seg(LOG_RECOVER, log_sys->buf,
group, start_lsn, end_lsn);
finished = recv_scan_log_recs(
(buf_pool_get_n_pages()
- (recv_n_pool_free_frames * srv_buf_pool_instances))
* UNIV_PAGE_SIZE,
TRUE, log_sys->buf, RECV_SCAN_SIZE,
start_lsn, contiguous_lsn, group_scanned_lsn);
start_lsn = end_lsn;
}
#ifdef UNIV_DEBUG
if (log_debug_writes) {
fprintf(stderr,
"InnoDB: Scanned group %lu up to"
" log sequence number " LSN_PF "\n",
(ulong) group->id,
*group_scanned_lsn);
}
#endif /* UNIV_DEBUG */
}
/*******************************************************//**
Initialize crash recovery environment. Can be called iff
recv_needed_recovery == FALSE. */
static
void
recv_init_crash_recovery(void)
/*==========================*/
{
ut_ad(!srv_read_only_mode);
ut_a(!recv_needed_recovery);
recv_needed_recovery = TRUE;
ib_logf(IB_LOG_LEVEL_INFO, "Database was not shutdown normally!");
ib_logf(IB_LOG_LEVEL_INFO, "Starting crash recovery.");
ib_logf(IB_LOG_LEVEL_INFO,
"Reading tablespace information from the .ibd files...");
fil_load_single_table_tablespaces();
/* If we are using the doublewrite method, we will
check if there are half-written pages in data files,
and restore them from the doublewrite buffer if
possible */
if (srv_force_recovery < SRV_FORCE_NO_LOG_REDO) {
ib_logf(IB_LOG_LEVEL_INFO,
"Restoring possible half-written data pages ");
ib_logf(IB_LOG_LEVEL_INFO,
"from the doublewrite buffer...");
buf_dblwr_process();
/* Spawn the background thread to flush dirty pages
from the buffer pools. */
recv_writer_thread_handle = os_thread_create(
recv_writer_thread, 0, 0);
}
}
/********************************************************//**
Recovers from a checkpoint. When this function returns, the database is able
to start processing of new user transactions, but the function
recv_recovery_from_checkpoint_finish should be called later to complete
the recovery and free the resources used in it.
@return error code or DB_SUCCESS */
UNIV_INTERN
dberr_t
recv_recovery_from_checkpoint_start_func(
/*=====================================*/
#ifdef UNIV_LOG_ARCHIVE
ulint type, /*!< in: LOG_CHECKPOINT or LOG_ARCHIVE */
lsn_t limit_lsn, /*!< in: recover up to this lsn if possible */
#endif /* UNIV_LOG_ARCHIVE */
lsn_t min_flushed_lsn,/*!< in: min flushed lsn from data files */
lsn_t max_flushed_lsn)/*!< in: max flushed lsn from data files */
{
log_group_t* group;
log_group_t* max_cp_group;
ulint max_cp_field;
lsn_t checkpoint_lsn;
ib_uint64_t checkpoint_no;
lsn_t group_scanned_lsn = 0;
lsn_t contiguous_lsn;
#ifdef UNIV_LOG_ARCHIVE
log_group_t* up_to_date_group;
lsn_t archived_lsn;
#endif /* UNIV_LOG_ARCHIVE */
byte* buf;
byte log_hdr_buf[LOG_FILE_HDR_SIZE];
dberr_t err;
ut_when_dtor<recv_dblwr_t> tmp(recv_sys->dblwr);
#ifdef UNIV_LOG_ARCHIVE
ut_ad(type != LOG_CHECKPOINT || limit_lsn == LSN_MAX);
/** TRUE when recovering from a checkpoint */
# define TYPE_CHECKPOINT (type == LOG_CHECKPOINT)
/** Recover up to this log sequence number */
# define LIMIT_LSN limit_lsn
#else /* UNIV_LOG_ARCHIVE */
/** TRUE when recovering from a checkpoint */
# define TYPE_CHECKPOINT 1
/** Recover up to this log sequence number */
# define LIMIT_LSN LSN_MAX
#endif /* UNIV_LOG_ARCHIVE */
if (srv_force_recovery >= SRV_FORCE_NO_LOG_REDO) {
ib_logf(IB_LOG_LEVEL_INFO,
"The user has set SRV_FORCE_NO_LOG_REDO on, "
"skipping log redo");
return(DB_SUCCESS);
}
recv_recovery_on = TRUE;
recv_sys->limit_lsn = LIMIT_LSN;
mutex_enter(&(log_sys->mutex));
/* Look for the latest checkpoint from any of the log groups */
err = recv_find_max_checkpoint(&max_cp_group, &max_cp_field);
if (err != DB_SUCCESS) {
mutex_exit(&(log_sys->mutex));
return(err);
}
log_group_read_checkpoint_info(max_cp_group, max_cp_field);
buf = log_sys->checkpoint_buf;
checkpoint_lsn = mach_read_from_8(buf + LOG_CHECKPOINT_LSN);
checkpoint_no = mach_read_from_8(buf + LOG_CHECKPOINT_NO);
#ifdef UNIV_LOG_ARCHIVE
archived_lsn = mach_read_from_8(buf + LOG_CHECKPOINT_ARCHIVED_LSN);
#endif /* UNIV_LOG_ARCHIVE */
/* Read the first log file header to print a note if this is
a recovery from a restored InnoDB Hot Backup */
fil_io(OS_FILE_READ | OS_FILE_LOG, true, max_cp_group->space_id, 0,
0, 0, LOG_FILE_HDR_SIZE,
log_hdr_buf, max_cp_group, 0);
if (0 == ut_memcmp(log_hdr_buf + LOG_FILE_WAS_CREATED_BY_HOT_BACKUP,
(byte*)"ibbackup", (sizeof "ibbackup") - 1)) {
if (srv_read_only_mode) {
ib_logf(IB_LOG_LEVEL_ERROR,
"Cannot restore from mysqlbackup, InnoDB "
"running in read-only mode!");
return(DB_ERROR);
}
/* This log file was created by mysqlbackup --restore: print
a note to the user about it */
ib_logf(IB_LOG_LEVEL_INFO,
"The log file was created by mysqlbackup --apply-log "
"at %s. The following crash recovery is part of a "
"normal restore.",
log_hdr_buf + LOG_FILE_WAS_CREATED_BY_HOT_BACKUP);
/* Wipe over the label now */
memset(log_hdr_buf + LOG_FILE_WAS_CREATED_BY_HOT_BACKUP,
' ', 4);
/* Write to the log file to wipe over the label */
fil_io(OS_FILE_WRITE | OS_FILE_LOG, true,
max_cp_group->space_id, 0,
0, 0, OS_FILE_LOG_BLOCK_SIZE,
log_hdr_buf, max_cp_group, 0);
}
#ifdef UNIV_LOG_ARCHIVE
group = UT_LIST_GET_FIRST(log_sys->log_groups);
while (group) {
log_checkpoint_get_nth_group_info(buf, group->id,
&(group->archived_file_no),
&(group->archived_offset));
group = UT_LIST_GET_NEXT(log_groups, group);
}
#endif /* UNIV_LOG_ARCHIVE */
if (TYPE_CHECKPOINT) {
/* Start reading the log groups from the checkpoint lsn up. The
variable contiguous_lsn contains an lsn up to which the log is
known to be contiguously written to all log groups. */
recv_sys->parse_start_lsn = checkpoint_lsn;
recv_sys->scanned_lsn = checkpoint_lsn;
recv_sys->scanned_checkpoint_no = 0;
recv_sys->recovered_lsn = checkpoint_lsn;
srv_start_lsn = checkpoint_lsn;
}
contiguous_lsn = ut_uint64_align_down(recv_sys->scanned_lsn,
OS_FILE_LOG_BLOCK_SIZE);
#ifdef UNIV_LOG_ARCHIVE
if (TYPE_CHECKPOINT) {
up_to_date_group = max_cp_group;
} else {
ulint capacity;
/* Try to recover the remaining part from logs: first from
the logs of the archived group */
group = recv_sys->archive_group;
capacity = log_group_get_capacity(group);
if (recv_sys->scanned_lsn > checkpoint_lsn + capacity
|| checkpoint_lsn > recv_sys->scanned_lsn + capacity) {
mutex_exit(&(log_sys->mutex));
/* The group does not contain enough log: probably
an archived log file was missing or corrupt */
return(DB_ERROR);
}
recv_group_scan_log_recs(group, &contiguous_lsn,
&group_scanned_lsn);
if (recv_sys->scanned_lsn < checkpoint_lsn) {
mutex_exit(&(log_sys->mutex));
/* The group did not contain enough log: an archived
log file was missing or invalid, or the log group
was corrupt */
return(DB_ERROR);
}
group->scanned_lsn = group_scanned_lsn;
up_to_date_group = group;
}
#endif /* UNIV_LOG_ARCHIVE */
ut_ad(RECV_SCAN_SIZE <= log_sys->buf_size);
group = UT_LIST_GET_FIRST(log_sys->log_groups);
#ifdef UNIV_LOG_ARCHIVE
if ((type == LOG_ARCHIVE) && (group == recv_sys->archive_group)) {
group = UT_LIST_GET_NEXT(log_groups, group);
}
#endif /* UNIV_LOG_ARCHIVE */
/* Set the flag to publish that we are doing startup scan. */
recv_log_scan_is_startup_type = TYPE_CHECKPOINT;
while (group) {
#ifdef UNIV_LOG_ARCHIVE
lsn_t old_scanned_lsn = recv_sys->scanned_lsn;
#endif /* UNIV_LOG_ARCHIVE */
recv_group_scan_log_recs(group, &contiguous_lsn,
&group_scanned_lsn);
group->scanned_lsn = group_scanned_lsn;
#ifdef UNIV_LOG_ARCHIVE
if (old_scanned_lsn < group_scanned_lsn) {
/* We found a more up-to-date group */
up_to_date_group = group;
}
if ((type == LOG_ARCHIVE)
&& (group == recv_sys->archive_group)) {
group = UT_LIST_GET_NEXT(log_groups, group);
}
#endif /* UNIV_LOG_ARCHIVE */
group = UT_LIST_GET_NEXT(log_groups, group);
}
/* Done with startup scan. Clear the flag. */
recv_log_scan_is_startup_type = FALSE;
if (TYPE_CHECKPOINT) {
/* NOTE: we always do a 'recovery' at startup, but only if
there is something wrong we will print a message to the
user about recovery: */
if (checkpoint_lsn != max_flushed_lsn
|| checkpoint_lsn != min_flushed_lsn) {
if (checkpoint_lsn < max_flushed_lsn) {
ib_logf(IB_LOG_LEVEL_WARN,
"The log sequence number "
"in the ibdata files is higher "
"than the log sequence number "
"in the ib_logfiles! Are you sure "
"you are using the right "
"ib_logfiles to start up the database. "
"Log sequence number in the "
"ib_logfiles is " LSN_PF ", log"
"sequence numbers stamped "
"to ibdata file headers are between "
"" LSN_PF " and " LSN_PF ".",
checkpoint_lsn,
min_flushed_lsn,
max_flushed_lsn);
}
if (!recv_needed_recovery) {
ib_logf(IB_LOG_LEVEL_INFO,
"The log sequence numbers "
LSN_PF " and " LSN_PF
" in ibdata files do not match"
" the log sequence number "
LSN_PF
" in the ib_logfiles!",
min_flushed_lsn,
max_flushed_lsn,
checkpoint_lsn);
if (!srv_read_only_mode) {
recv_init_crash_recovery();
} else {
ib_logf(IB_LOG_LEVEL_ERROR,
"Can't initiate database "
"recovery, running "
"in read-only-mode.");
return(DB_READ_ONLY);
}
}
}
}
/* We currently have only one log group */
if (group_scanned_lsn < checkpoint_lsn
|| group_scanned_lsn < recv_max_page_lsn) {
ib_logf(IB_LOG_LEVEL_ERROR,
"We scanned the log up to "
LSN_PF ". A checkpoint was at " LSN_PF
" and the maximum LSN on a database page was " LSN_PF
". It is possible that the database is now corrupt!",
group_scanned_lsn, checkpoint_lsn, recv_max_page_lsn);
}
if (recv_sys->recovered_lsn < checkpoint_lsn) {
mutex_exit(&(log_sys->mutex));
if (recv_sys->recovered_lsn >= LIMIT_LSN) {
return(DB_SUCCESS);
}
/* No harm in trying to do RO access. */
if (!srv_read_only_mode) {
ut_error;
}
return(DB_ERROR);
}
/* Synchronize the uncorrupted log groups to the most up-to-date log
group; we also copy checkpoint info to groups */
log_sys->next_checkpoint_lsn = checkpoint_lsn;
log_sys->next_checkpoint_no = checkpoint_no + 1;
#ifdef UNIV_LOG_ARCHIVE
log_sys->archived_lsn = archived_lsn;
recv_synchronize_groups(up_to_date_group);
#else /* UNIV_LOG_ARCHIVE */
recv_synchronize_groups();
#endif /* UNIV_LOG_ARCHIVE */
if (!recv_needed_recovery) {
ut_a(checkpoint_lsn == recv_sys->recovered_lsn);
} else {
srv_start_lsn = recv_sys->recovered_lsn;
}
log_sys->lsn = recv_sys->recovered_lsn;
ut_memcpy(log_sys->buf, recv_sys->last_block, OS_FILE_LOG_BLOCK_SIZE);
log_sys->buf_free = (ulint) log_sys->lsn % OS_FILE_LOG_BLOCK_SIZE;
log_sys->buf_next_to_write = log_sys->buf_free;
log_sys->written_to_some_lsn = log_sys->lsn;
log_sys->written_to_all_lsn = log_sys->lsn;
log_sys->last_checkpoint_lsn = checkpoint_lsn;
MONITOR_SET(MONITOR_LSN_CHECKPOINT_AGE,
log_sys->lsn - log_sys->last_checkpoint_lsn);
log_sys->next_checkpoint_no = checkpoint_no + 1;
#ifdef UNIV_LOG_ARCHIVE
if (archived_lsn == LSN_MAX) {
log_sys->archiving_state = LOG_ARCH_OFF;
}
#endif /* UNIV_LOG_ARCHIVE */
mutex_enter(&recv_sys->mutex);
recv_sys->apply_log_recs = TRUE;
mutex_exit(&recv_sys->mutex);
mutex_exit(&log_sys->mutex);
recv_lsn_checks_on = TRUE;
/* The database is now ready to start almost normal processing of user
transactions: transaction rollbacks and the application of the log
records in the hash table can be run in background. */
return(DB_SUCCESS);
#undef TYPE_CHECKPOINT
#undef LIMIT_LSN
}
/********************************************************//**
Completes recovery from a checkpoint. */
UNIV_INTERN
void
recv_recovery_from_checkpoint_finish(void)
/*======================================*/
{
/* Apply the hashed log records to the respective file pages */
if (srv_force_recovery < SRV_FORCE_NO_LOG_REDO) {
recv_apply_hashed_log_recs(TRUE);
}
DBUG_PRINT("ib_log", ("apply completed"));
if (recv_needed_recovery) {
trx_sys_print_mysql_master_log_pos();
trx_sys_print_mysql_binlog_offset();
}
if (recv_sys->found_corrupt_log) {
fprintf(stderr,
"InnoDB: WARNING: the log file may have been"
" corrupt and it\n"
"InnoDB: is possible that the log scan or parsing"
" did not proceed\n"
"InnoDB: far enough in recovery. Please run"
" CHECK TABLE\n"
"InnoDB: on your InnoDB tables to check that"
" they are ok!\n"
"InnoDB: It may be safest to recover your"
" InnoDB database from\n"
"InnoDB: a backup!\n");
}
/* Make sure that the recv_writer thread is done. This is
required because it grabs various mutexes and we want to
ensure that when we enable sync_order_checks there is no
mutex currently held by any thread. */
mutex_enter(&recv_sys->writer_mutex);
/* Free the resources of the recovery system */
recv_recovery_on = FALSE;
/* By acquring the mutex we ensure that the recv_writer thread
won't trigger any more LRU batchtes. Now wait for currently
in progress batches to finish. */
buf_flush_wait_LRU_batch_end();
mutex_exit(&recv_sys->writer_mutex);
ulint count = 0;
while (recv_writer_thread_active) {
++count;
os_thread_sleep(100000);
if (srv_print_verbose_log && count > 600) {
ib_logf(IB_LOG_LEVEL_INFO,
"Waiting for recv_writer to "
"finish flushing of buffer pool");
count = 0;
}
}
#ifdef __WIN__
if (recv_writer_thread_handle) {
CloseHandle(recv_writer_thread_handle);
}
#endif /* __WIN__ */
#ifndef UNIV_LOG_DEBUG
recv_sys_debug_free();
#endif
/* Roll back any recovered data dictionary transactions, so
that the data dictionary tables will be free of any locks.
The data dictionary latch should guarantee that there is at
most one data dictionary transaction active at a time. */
if (srv_force_recovery < SRV_FORCE_NO_TRX_UNDO) {
trx_rollback_or_clean_recovered(FALSE);
}
}
/********************************************************//**
Initiates the rollback of active transactions. */
UNIV_INTERN
void
recv_recovery_rollback_active(void)
/*===============================*/
{
#ifdef UNIV_SYNC_DEBUG
/* Wait for a while so that created threads have time to suspend
themselves before we switch the latching order checks on */
os_thread_sleep(1000000);
ut_ad(!recv_writer_thread_active);
/* Switch latching order checks on in sync0sync.cc */
sync_order_checks_on = TRUE;
#endif
/* We can't start any (DDL) transactions if UNDO logging
has been disabled, additionally disable ROLLBACK of recovered
user transactions. */
if (srv_force_recovery < SRV_FORCE_NO_TRX_UNDO
&& !srv_read_only_mode) {
/* Drop partially created indexes. */
row_merge_drop_temp_indexes();
/* Drop temporary tables. */
row_mysql_drop_temp_tables();
/* Drop any auxiliary tables that were not dropped when the
parent table was dropped. This can happen if the parent table
was dropped but the server crashed before the auxiliary tables
were dropped. */
fts_drop_orphaned_tables();
/* Rollback the uncommitted transactions which have no user
session */
os_thread_create(trx_rollback_or_clean_all_recovered, 0, 0);
}
}
/******************************************************//**
Resets the logs. The contents of log files will be lost! */
UNIV_INTERN
void
recv_reset_logs(
/*============*/
#ifdef UNIV_LOG_ARCHIVE
ulint arch_log_no, /*!< in: next archived log file number */
ibool new_logs_created,/*!< in: TRUE if resetting logs
is done at the log creation;
FALSE if it is done after
archive recovery */
#endif /* UNIV_LOG_ARCHIVE */
lsn_t lsn) /*!< in: reset to this lsn
rounded up to be divisible by
OS_FILE_LOG_BLOCK_SIZE, after
which we add
LOG_BLOCK_HDR_SIZE */
{
log_group_t* group;
ut_ad(mutex_own(&(log_sys->mutex)));
log_sys->lsn = ut_uint64_align_up(lsn, OS_FILE_LOG_BLOCK_SIZE);
group = UT_LIST_GET_FIRST(log_sys->log_groups);
while (group) {
group->lsn = log_sys->lsn;
group->lsn_offset = LOG_FILE_HDR_SIZE;
#ifdef UNIV_LOG_ARCHIVE
group->archived_file_no = arch_log_no;
group->archived_offset = 0;
if (!new_logs_created) {
recv_truncate_group(group, group->lsn, group->lsn,
group->lsn, group->lsn);
}
#endif /* UNIV_LOG_ARCHIVE */
group = UT_LIST_GET_NEXT(log_groups, group);
}
log_sys->buf_next_to_write = 0;
log_sys->written_to_some_lsn = log_sys->lsn;
log_sys->written_to_all_lsn = log_sys->lsn;
log_sys->next_checkpoint_no = 0;
log_sys->last_checkpoint_lsn = 0;
#ifdef UNIV_LOG_ARCHIVE
log_sys->archived_lsn = log_sys->lsn;
#endif /* UNIV_LOG_ARCHIVE */
log_block_init(log_sys->buf, log_sys->lsn);
log_block_set_first_rec_group(log_sys->buf, LOG_BLOCK_HDR_SIZE);
log_sys->buf_free = LOG_BLOCK_HDR_SIZE;
log_sys->lsn += LOG_BLOCK_HDR_SIZE;
MONITOR_SET(MONITOR_LSN_CHECKPOINT_AGE,
(log_sys->lsn - log_sys->last_checkpoint_lsn));
mutex_exit(&(log_sys->mutex));
/* Reset the checkpoint fields in logs */
log_make_checkpoint_at(LSN_MAX, TRUE);
mutex_enter(&(log_sys->mutex));
}
#endif /* !UNIV_HOTBACKUP */
#ifdef UNIV_HOTBACKUP
/******************************************************//**
Creates new log files after a backup has been restored. */
UNIV_INTERN
void
recv_reset_log_files_for_backup(
/*============================*/
const char* log_dir, /*!< in: log file directory path */
ulint n_log_files, /*!< in: number of log files */
lsn_t log_file_size, /*!< in: log file size */
lsn_t lsn) /*!< in: new start lsn, must be
divisible by OS_FILE_LOG_BLOCK_SIZE */
{
os_file_t log_file;
ibool success;
byte* buf;
ulint i;
ulint log_dir_len;
char name[5000];
static const char ib_logfile_basename[] = "ib_logfile";
log_dir_len = strlen(log_dir);
/* full path name of ib_logfile consists of log dir path + basename
+ number. This must fit in the name buffer.
*/
ut_a(log_dir_len + strlen(ib_logfile_basename) + 11 < sizeof(name));
buf = ut_malloc(LOG_FILE_HDR_SIZE + OS_FILE_LOG_BLOCK_SIZE);
memset(buf, '\0', LOG_FILE_HDR_SIZE + OS_FILE_LOG_BLOCK_SIZE);
for (i = 0; i < n_log_files; i++) {
sprintf(name, "%s%s%lu", log_dir,
ib_logfile_basename, (ulong) i);
log_file = os_file_create_simple(innodb_file_log_key,
name, OS_FILE_CREATE,
OS_FILE_READ_WRITE,
&success);
if (!success) {
fprintf(stderr,
"InnoDB: Cannot create %s. Check that"
" the file does not exist yet.\n", name);
exit(1);
}
fprintf(stderr,
"Setting log file size to %llu\n",
log_file_size);
success = os_file_set_size(name, log_file, log_file_size);
if (!success) {
fprintf(stderr,
"InnoDB: Cannot set %s size to %llu\n",
name, log_file_size);
exit(1);
}
os_file_flush(log_file);
os_file_close(log_file);
}
/* We pretend there is a checkpoint at lsn + LOG_BLOCK_HDR_SIZE */
log_reset_first_header_and_checkpoint(buf, lsn);
log_block_init_in_old_format(buf + LOG_FILE_HDR_SIZE, lsn);
log_block_set_first_rec_group(buf + LOG_FILE_HDR_SIZE,
LOG_BLOCK_HDR_SIZE);
sprintf(name, "%s%s%lu", log_dir, ib_logfile_basename, (ulong)0);
log_file = os_file_create_simple(innodb_file_log_key,
name, OS_FILE_OPEN,
OS_FILE_READ_WRITE, &success);
if (!success) {
fprintf(stderr, "InnoDB: Cannot open %s.\n", name);
exit(1);
}
os_file_write(name, log_file, buf, 0,
LOG_FILE_HDR_SIZE + OS_FILE_LOG_BLOCK_SIZE);
os_file_flush(log_file);
os_file_close(log_file);
ut_free(buf);
}
#endif /* UNIV_HOTBACKUP */
#ifdef UNIV_LOG_ARCHIVE
/* Dead code */
/******************************************************//**
Reads from the archive of a log group and performs recovery.
@return TRUE if no more complete consistent archive files */
static
ibool
log_group_recover_from_archive_file(
/*================================*/
log_group_t* group) /*!< in: log group */
{
os_file_t file_handle;
ib_uint64_t start_lsn;
ib_uint64_t file_end_lsn;
ib_uint64_t dummy_lsn;
ib_uint64_t scanned_lsn;
ulint len;
ibool ret;
byte* buf;
os_offset_t read_offset;
os_offset_t file_size;
int input_char;
char name[10000];
ut_a(0);
try_open_again:
buf = log_sys->buf;
/* Add the file to the archive file space; open the file */
log_archived_file_name_gen(name, group->id, group->archived_file_no);
file_handle = os_file_create(innodb_file_log_key,
name, OS_FILE_OPEN,
OS_FILE_LOG, OS_FILE_AIO, &ret);
if (ret == FALSE) {
ask_again:
fprintf(stderr,
"InnoDB: Do you want to copy additional"
" archived log files\n"
"InnoDB: to the directory\n");
fprintf(stderr,
"InnoDB: or were these all the files needed"
" in recovery?\n");
fprintf(stderr,
"InnoDB: (Y == copy more files; N == this is all)?");
input_char = getchar();
if (input_char == (int) 'N') {
return(TRUE);
} else if (input_char == (int) 'Y') {
goto try_open_again;
} else {
goto ask_again;
}
}
file_size = os_file_get_size(file_handle);
ut_a(file_size != (os_offset_t) -1);
fprintf(stderr, "InnoDB: Opened archived log file %s\n", name);
ret = os_file_close(file_handle);
if (file_size < LOG_FILE_HDR_SIZE) {
fprintf(stderr,
"InnoDB: Archive file header incomplete %s\n", name);
return(TRUE);
}
ut_a(ret);
/* Add the archive file as a node to the space */
fil_node_create(name, 1 + file_size / UNIV_PAGE_SIZE,
group->archive_space_id, FALSE);
#if RECV_SCAN_SIZE < LOG_FILE_HDR_SIZE
# error "RECV_SCAN_SIZE < LOG_FILE_HDR_SIZE"
#endif
/* Read the archive file header */
fil_io(OS_FILE_READ | OS_FILE_LOG, true, group->archive_space_id, 0, 0,
LOG_FILE_HDR_SIZE, buf, NULL, 0);
/* Check if the archive file header is consistent */
if (mach_read_from_4(buf + LOG_GROUP_ID) != group->id
|| mach_read_from_4(buf + LOG_FILE_NO)
!= group->archived_file_no) {
fprintf(stderr,
"InnoDB: Archive file header inconsistent %s\n", name);
return(TRUE);
}
if (!mach_read_from_4(buf + LOG_FILE_ARCH_COMPLETED)) {
fprintf(stderr,
"InnoDB: Archive file not completely written %s\n",
name);
return(TRUE);
}
start_lsn = mach_read_from_8(buf + LOG_FILE_START_LSN);
file_end_lsn = mach_read_from_8(buf + LOG_FILE_END_LSN);
if (!recv_sys->scanned_lsn) {
if (recv_sys->parse_start_lsn < start_lsn) {
fprintf(stderr,
"InnoDB: Archive log file %s"
" starts from too big a lsn\n",
name);
return(TRUE);
}
recv_sys->scanned_lsn = start_lsn;
}
if (recv_sys->scanned_lsn != start_lsn) {
fprintf(stderr,
"InnoDB: Archive log file %s starts from"
" a wrong lsn\n",
name);
return(TRUE);
}
read_offset = LOG_FILE_HDR_SIZE;
for (;;) {
len = RECV_SCAN_SIZE;
if (read_offset + len > file_size) {
len = ut_calc_align_down(file_size - read_offset,
OS_FILE_LOG_BLOCK_SIZE);
}
if (len == 0) {
break;
}
#ifdef UNIV_DEBUG
if (log_debug_writes) {
fprintf(stderr,
"InnoDB: Archive read starting at"
" lsn %llu, len %lu from file %s\n",
start_lsn,
(ulong) len, name);
}
#endif /* UNIV_DEBUG */
fil_io(OS_FILE_READ | OS_FILE_LOG, true,
group->archive_space_id, read_offset / UNIV_PAGE_SIZE,
read_offset % UNIV_PAGE_SIZE, len, buf, NULL, 0);
ret = recv_scan_log_recs(
(buf_pool_get_n_pages()
- (recv_n_pool_free_frames * srv_buf_pool_instances))
* UNIV_PAGE_SIZE, TRUE, buf, len, start_lsn,
&dummy_lsn, &scanned_lsn);
if (scanned_lsn == file_end_lsn) {
return(FALSE);
}
if (ret) {
fprintf(stderr,
"InnoDB: Archive log file %s"
" does not scan right\n",
name);
return(TRUE);
}
read_offset += len;
start_lsn += len;
ut_ad(start_lsn == scanned_lsn);
}
return(FALSE);
}
/********************************************************//**
Recovers from archived log files, and also from log files, if they exist.
@return error code or DB_SUCCESS */
UNIV_INTERN
ulint
recv_recovery_from_archive_start(
/*=============================*/
ib_uint64_t min_flushed_lsn,/*!< in: min flushed lsn field from the
data files */
ib_uint64_t limit_lsn, /*!< in: recover up to this lsn if
possible */
ulint first_log_no) /*!< in: number of the first archived
log file to use in the recovery; the
file will be searched from
INNOBASE_LOG_ARCH_DIR specified in
server config file */
{
log_group_t* group;
ulint group_id;
ulint trunc_len;
ibool ret;
ulint err;
ut_a(0);
recv_sys_create();
recv_sys_init(buf_pool_get_curr_size());
recv_recovery_on = TRUE;
recv_recovery_from_backup_on = TRUE;
recv_sys->limit_lsn = limit_lsn;
group_id = 0;
group = UT_LIST_GET_FIRST(log_sys->log_groups);
while (group) {
if (group->id == group_id) {
break;
}
group = UT_LIST_GET_NEXT(log_groups, group);
}
if (!group) {
fprintf(stderr,
"InnoDB: There is no log group defined with id %lu!\n",
(ulong) group_id);
return(DB_ERROR);
}
group->archived_file_no = first_log_no;
recv_sys->parse_start_lsn = min_flushed_lsn;
recv_sys->scanned_lsn = 0;
recv_sys->scanned_checkpoint_no = 0;
recv_sys->recovered_lsn = recv_sys->parse_start_lsn;
recv_sys->archive_group = group;
ret = FALSE;
mutex_enter(&(log_sys->mutex));
while (!ret) {
ret = log_group_recover_from_archive_file(group);
/* Close and truncate a possible processed archive file
from the file space */
trunc_len = UNIV_PAGE_SIZE
* fil_space_get_size(group->archive_space_id);
if (trunc_len > 0) {
fil_space_truncate_start(group->archive_space_id,
trunc_len);
}
group->archived_file_no++;
}
if (recv_sys->recovered_lsn < limit_lsn) {
if (!recv_sys->scanned_lsn) {
recv_sys->scanned_lsn = recv_sys->parse_start_lsn;
}
mutex_exit(&(log_sys->mutex));
err = recv_recovery_from_checkpoint_start(LOG_ARCHIVE,
limit_lsn,
LSN_MAX,
LSN_MAX);
if (err != DB_SUCCESS) {
return(err);
}
mutex_enter(&(log_sys->mutex));
}
if (limit_lsn != LSN_MAX) {
recv_apply_hashed_log_recs(FALSE);
recv_reset_logs(0, FALSE, recv_sys->recovered_lsn);
}
mutex_exit(&(log_sys->mutex));
return(DB_SUCCESS);
}
/********************************************************//**
Completes recovery from archive. */
UNIV_INTERN
void
recv_recovery_from_archive_finish(void)
/*===================================*/
{
recv_recovery_from_checkpoint_finish();
recv_recovery_from_backup_on = FALSE;
}
#endif /* UNIV_LOG_ARCHIVE */
void recv_dblwr_t::add(byte* page)
{
pages.push_back(page);
}
byte* recv_dblwr_t::find_page(ulint space_id, ulint page_no)
{
std::vector<byte*> matches;
byte* result = 0;
for (std::list<byte*>::iterator i = pages.begin();
i != pages.end(); ++i) {
if ((page_get_space_id(*i) == space_id)
&& (page_get_page_no(*i) == page_no)) {
matches.push_back(*i);
}
}
if (matches.size() == 1) {
result = matches[0];
} else if (matches.size() > 1) {
lsn_t max_lsn = 0;
lsn_t page_lsn = 0;
for (std::vector<byte*>::iterator i = matches.begin();
i != matches.end(); ++i) {
page_lsn = mach_read_from_8(*i + FIL_PAGE_LSN);
if (page_lsn > max_lsn) {
max_lsn = page_lsn;
result = *i;
}
}
}
return(result);
}
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