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innochecksum.cc
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/*
Copyright (c) 2005, 2024, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
InnoDB offline file checksum utility. 85% of the code in this utility
is included from the InnoDB codebase.
The final 15% was originally written by Mark Smith of Danga
Interactive, Inc. <junior@danga.com>
Published with a permission.
*/
#include "my_config.h"
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <iostream>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_getopt.h"
#include "my_macros.h"
#include "nulls.h"
#include "prealloced_array.h"
#include "print_version.h"
#include "template_utils.h"
#include "typelib.h"
#include "welcome_copyright_notice.h" /* ORACLE_WELCOME_COPYRIGHT_NOTICE */
/* Only parts of these files are included from the InnoDB codebase.
The parts not included are excluded by #ifndef UNIV_INNOCHECKSUM. */
#include "storage/innobase/include/buf0checksum.h"
#include "storage/innobase/include/fil0types.h"
#include "storage/innobase/include/fsp0fsp.h" /* fsp_flags_get_page_size() &
fsp_flags_get_zip_size() */
#include "storage/innobase/include/fut0lst.h" /* FLST_NODE_SIZE */
#include "storage/innobase/include/mach0data.h" /* mach_read_from_4() */
#include "storage/innobase/include/os0file.h"
#include "storage/innobase/include/page0page.h" /* PAGE_* */
#include "storage/innobase/include/page0size.h" /* page_size_t */
#include "storage/innobase/include/page0zip.h"
#include "storage/innobase/include/trx0undo.h" /* TRX_UNDO_* */
#include "storage/innobase/include/univ.i" /* include all of this */
#include "storage/innobase/include/ut0crc32.h" /* ut_crc32_init() */
/* Global variables */
static bool verbose;
static bool just_count;
static uintmax_t start_page;
static uintmax_t end_page;
static uintmax_t do_page;
static bool use_end_page;
static bool do_one_page;
/* replaces declaration in srv0srv.c */
ulong srv_page_size;
ulong srv_page_size_shift;
page_size_t univ_page_size(0, 0, false);
extern ulong srv_checksum_algorithm;
/* Current page number (0 based). */
uintmax_t cur_page_num;
/* Skip the checksum verification. */
static bool no_check;
/* Enabled for strict checksum verification. */
bool strict_verify = false;
/* Enabled for rewrite checksum. */
static bool do_write;
/* Mismatches count allowed (0 by default). */
static uintmax_t allow_mismatches;
static bool page_type_summary;
static bool page_type_dump;
/* Store filename for page-type-dump option. */
char *page_dump_filename = nullptr;
/* skip the checksum verification & rewrite if page is doublewrite buffer. */
static bool skip_page = false;
const char *dbug_setting = "FALSE";
char *log_filename = nullptr;
/* User defined filename for logging. */
FILE *log_file = nullptr;
/* Enabled for log write option. */
static bool is_log_enabled = false;
#ifndef _WIN32
/* advisory lock for non-window system. */
struct flock lk;
#endif /* _WIN32 */
/* Strict check algorithm name. */
static ulong strict_check;
/* Rewrite checksum algorithm name. */
static ulong write_check;
/* Innodb page type. */
struct innodb_page_type {
int n_undo_state_active;
int n_undo_state_cached;
int n_undo_state_to_free;
int n_undo_state_to_purge;
int n_undo_state_prepared;
int n_undo_state_other;
int n_undo_insert;
int n_undo_update;
int n_undo_other;
int n_fil_page_index;
int n_fil_page_undo_log;
int n_fil_page_inode;
int n_fil_page_ibuf_free_list;
int n_fil_page_ibuf_bitmap;
int n_fil_page_type_sys;
int n_fil_page_type_trx_sys;
int n_fil_page_type_fsp_hdr;
int n_fil_page_type_allocated;
int n_fil_page_type_xdes;
int n_fil_page_type_blob;
int n_fil_page_type_zblob;
int n_fil_page_type_other;
int n_fil_page_type_zblob2;
int n_fil_page_sdi_index;
int n_fil_page_sdi_blob;
int n_fil_page_sdi_zblob;
} page_type;
/* Possible values for "--strict-check" for strictly verify checksum
and "--write" for rewrite checksum. */
static const char *innochecksum_algorithms[] = {
"crc32", "crc32", "innodb", "innodb", "none", "none", NullS};
/* Used to define an enumerate type of the "innochecksum algorithm". */
static TYPELIB innochecksum_algorithms_typelib = {
array_elements(innochecksum_algorithms) - 1, "", innochecksum_algorithms,
nullptr};
/** Error logging classes. */
namespace ib {
logger::~logger() = default;
info::~info() {
std::cerr << "[INFO] innochecksum: " << m_oss.str() << std::endl;
}
warn::~warn() {
std::cerr << "[WARNING] innochecksum: " << m_oss.str() << std::endl;
}
error::~error() {
std::cerr << "[ERROR] innochecksum: " << m_oss.str() << std::endl;
}
/*
MSVS complains: Warning C4722: destructor never returns, potential memory leak.
But, the whole point of using ib::fatal temporary object is to cause an abort.
*/
MY_COMPILER_DIAGNOSTIC_PUSH()
MY_COMPILER_MSVC_DIAGNOSTIC_IGNORE(4722)
fatal::~fatal() {
std::cerr << "[FATAL] innochecksum: " << m_oss.str() << std::endl;
ut_error;
}
// Restore the MSVS checks for Warning C4722, silenced for ib::fatal::~fatal().
MY_COMPILER_DIAGNOSTIC_POP()
} // namespace ib
/** A dummy implementation. Actual implementation available in fil0fil.cc */
std::ostream &Fil_page_header::print(std::ostream &out) const noexcept {
return out;
}
/** Check that a page_size is correct for InnoDB. If correct, set the
associated page_size_shift which is the power of 2 for this page size.
@param[in] page_size page size to evaluate
@return an associated page_size_shift if valid, 0 if invalid. */
static int innodb_page_size_validate(ulong page_size) {
ulong n;
DBUG_TRACE;
for (n = UNIV_PAGE_SIZE_SHIFT_MIN; n <= UNIV_PAGE_SIZE_SHIFT_MAX; n++) {
if (page_size == (ulong)(1 << n)) {
return n;
}
}
return 0;
}
/** Get the page size of the filespace from the filespace header.
@param[in] buf buffer used to read the page.
@return page size */
static const page_size_t get_page_size(byte *buf) {
const ulint flags = mach_read_from_4(buf + FIL_PAGE_DATA + FSP_SPACE_FLAGS);
const ulint ssize = FSP_FLAGS_GET_PAGE_SSIZE(flags);
if (ssize == 0) {
srv_page_size = UNIV_PAGE_SIZE_ORIG;
} else {
srv_page_size = ((UNIV_ZIP_SIZE_MIN >> 1) << ssize);
}
srv_page_size_shift = innodb_page_size_validate(srv_page_size);
ut_ad(srv_page_size_shift != 0);
univ_page_size.copy_from(page_size_t(srv_page_size, srv_page_size, false));
return (page_size_t(flags));
}
/** Decompress a page
@param[in,out] buf Page read from disk, uncompressed data will
also be copied to this page
@param[in, out] scratch Page to use for temporary decompress
@param[in] page_size scratch physical size
@return true if decompress succeeded */
static bool page_decompress(byte *buf, byte *scratch, page_size_t page_size) {
dberr_t err;
/* Set the dblwr recover flag to false. */
err = os_file_decompress_page(false, buf, scratch, page_size.physical());
return (err == DB_SUCCESS);
}
#ifdef _WIN32
/***********************************************/ /*
@param [in] error error no. from the getLastError().
@retval error message corresponding to error no.
*/
static char *error_message(int error) {
static char err_msg[1024] = {'\0'};
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, error,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)err_msg,
sizeof(err_msg), nullptr);
return (err_msg);
}
#endif /* _WIN32 */
/***********************************************/ /*
@param>>_______[in] name>_____name of file.
@retval file pointer; file pointer is NULL nullptr when error occurred.
*/
static FILE *open_file(const char *name) {
int fd; /* file descriptor. */
FILE *fil_in;
#ifdef _WIN32
HANDLE hFile; /* handle to open file. */
DWORD access; /* define access control */
int flags = 0; /* define the mode for file
descriptor */
if (do_write) {
access = GENERIC_READ | GENERIC_WRITE;
flags = _O_RDWR | _O_BINARY;
} else {
access = GENERIC_READ;
flags = _O_RDONLY | _O_BINARY;
}
/* CreateFile() also provide advisory lock with the usage of
access and share mode of the file.*/
hFile =
CreateFile((LPCTSTR)name, access, 0L, nullptr, OPEN_EXISTING, 0, nullptr);
if (hFile == INVALID_HANDLE_VALUE) {
/* print the error message. */
fprintf(stderr, "Filename::%s %s\n", name, error_message(GetLastError()));
return (nullptr);
}
/* get the file descriptor. */
fd = _open_osfhandle((intptr_t)hFile, flags);
#else /* _WIN32 */
int create_flag;
/* define the advisory lock and open file mode. */
if (do_write) {
create_flag = O_RDWR;
lk.l_type = F_WRLCK;
} else {
create_flag = O_RDONLY;
lk.l_type = F_RDLCK;
}
fd = open(name, create_flag);
lk.l_whence = SEEK_SET;
lk.l_start = lk.l_len = 0;
if (fcntl(fd, F_SETLK, &lk) == -1) {
fprintf(stderr,
"Error: Unable to lock file::"
" %s\n",
name);
perror("fcntl");
return (nullptr);
}
#endif /* _WIN32 */
if (do_write) {
fil_in = fdopen(fd, "rb+");
} else {
fil_in = fdopen(fd, "rb");
}
return (fil_in);
}
/** Read the contents of file.
@param[in,out] buf read the file in buffer
@param[in] partial_page_read enable when to read the
remaining buffer for first page
@param[in] page_size page size
@param[in,out] fil_in file pointer created for the
tablespace
@retval number of bytes read
*/
static ulong read_file(byte *buf, bool partial_page_read,
const page_size_t &page_size, FILE *fil_in) {
ulong bytes = 0;
size_t physical_page_size = static_cast<size_t>(page_size.physical());
assert(physical_page_size >= UNIV_ZIP_SIZE_MIN);
if (partial_page_read) {
buf += UNIV_ZIP_SIZE_MIN;
physical_page_size -= UNIV_ZIP_SIZE_MIN;
bytes = UNIV_ZIP_SIZE_MIN;
}
/* Nothing to read from file, just return */
if (physical_page_size == 0) {
return (bytes);
}
bytes += ulong(fread(buf, 1, physical_page_size, fil_in));
return (bytes);
}
/** Class to check if a page is corrupted and print calculated
checksum values. */
class InnocheckReporter : public BlockReporter {
public:
/** Constructor
@param[in] check_lsn checks lsn of the page with the
current lsn (only in recovery)
@param[in] read_buf buffer holding the page
@param[in] page_size page size
@param[in] skip_checksum skip checksum verification
@param[in] strict_check true if strict checksum option enabled
@param[in] is_log_enabled true if the log file is passed to
innochecksum by user
@param[in,out] log_file the log file to write checksum values
and checksum mismatch messages */
InnocheckReporter(bool check_lsn, const byte *read_buf,
const page_size_t &page_size, bool skip_checksum,
bool strict_check, bool is_log_enabled, FILE *log_file)
: BlockReporter(check_lsn, read_buf, page_size, skip_checksum),
m_strict_check(strict_check),
m_is_log_enabled(is_log_enabled),
m_log_file(log_file) {
m_page_no = mach_read_from_4(read_buf + FIL_PAGE_OFFSET);
}
/** Print message if page is empty.
@param[in] empty true if page is empty */
inline void report_empty_page(bool empty) const override {
if (empty && m_is_log_enabled) {
fprintf(m_log_file, "Page::%" PRIuMAX " is empty and uncorrupted\n",
m_page_no);
}
}
/** Print crc32 checksum and the checksum fields in page.
@param[in] checksum_field1 Checksum in page header
@param[in] checksum_field2 Checksum in page trailer
@param[in] crc32 Calculated crc32 checksum */
inline void print_strict_crc32(uint32_t checksum_field1,
uint32_t checksum_field2, uint32_t crc32,
srv_checksum_algorithm_t algo) const override {
if (algo != SRV_CHECKSUM_ALGORITHM_STRICT_CRC32 || !m_is_log_enabled) {
return;
}
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" crc32 calculated = %" PRIu32
";"
" recorded checksum field1 = %" PRIu32
" recorded checksum field2 = %" PRIu32 "\n",
m_page_no, crc32, checksum_field1, checksum_field2);
}
/** Print innodb checksum and the checksum fields in page.
@param[in] checksum_field1 Checksum in page header
@param[in] checksum_field2 Checksum in page trailer */
inline void print_strict_innodb(uint32_t checksum_field1,
uint32_t checksum_field2) const override {
if (!m_is_log_enabled) {
return;
}
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" old style: calculated = %" PRIu32 "; recorded checksum = %" PRIu32
"\n",
m_page_no, buf_calc_page_old_checksum(m_read_buf), checksum_field2);
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" new style: calculated = %" PRIu32 "; recorded checksum = %" PRIu32
"\n",
m_page_no, buf_calc_page_new_checksum(m_read_buf), checksum_field1);
}
/** Print none checksum and the checksum fields in page.
@param[in] checksum_field1 Checksum in page header
@param[in] checksum_field2 Checksum in page trailer */
inline void print_strict_none(uint32_t checksum_field1,
uint32_t checksum_field2,
srv_checksum_algorithm_t algo) const override {
if (!m_is_log_enabled || algo != SRV_CHECKSUM_ALGORITHM_STRICT_NONE) {
return;
}
fprintf(m_log_file,
"page::%" PRIuMAX "; none checksum: calculated = %" PRIu32
"; recorded checksum_field1 = %" PRIu32
" recorded checksum_field2 = %" PRIu32 "\n",
m_page_no, BUF_NO_CHECKSUM_MAGIC, checksum_field1, checksum_field2);
}
/** Print a message that none check failed. */
inline void print_none_fail() const override {
fprintf(m_log_file,
"Fail; page %" PRIuMAX " invalid (fails none checksum)\n",
m_page_no);
}
/** Print innodb checksum value stored in page trailer.
@param[in] old_checksum checksum value according to old style
@param[in] new_checksum checksum value according to new style
@param[in] checksum_field1 Checksum in page header
@param[in] checksum_field2 Checksum in page trailer
@param[in] algo current checksum algorithm */
inline void print_innodb_checksum(
uint32_t old_checksum, uint32_t new_checksum, uint32_t checksum_field1,
uint32_t checksum_field2, srv_checksum_algorithm_t algo) const override {
if (!m_is_log_enabled) {
return;
}
switch (algo) {
case SRV_CHECKSUM_ALGORITHM_INNODB:
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" old style: calculated = %" PRIu32 "; recorded = %" PRIu32
"\n",
m_page_no, old_checksum, checksum_field2);
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" new style: calculated = %" PRIu32 "; crc32 = %" PRIu32
"; recorded = %" PRIu32 "\n",
m_page_no, new_checksum, buf_calc_page_crc32(m_read_buf),
checksum_field1);
break;
case SRV_CHECKSUM_ALGORITHM_STRICT_INNODB:
fprintf(log_file,
"page::%" PRIuMAX
";"
" old style: calculated = %" PRIu32
"; recorded checksum = %" PRIu32 "\n",
m_page_no, old_checksum, checksum_field2);
fprintf(log_file,
"page::%" PRIuMAX
";"
" new style: calculated = %" PRIu32
"; recorded checksum = %" PRIu32 "\n",
m_page_no, new_checksum, checksum_field1);
break;
case SRV_CHECKSUM_ALGORITHM_CRC32:
case SRV_CHECKSUM_ALGORITHM_STRICT_CRC32:
case SRV_CHECKSUM_ALGORITHM_NONE:
case SRV_CHECKSUM_ALGORITHM_STRICT_NONE:
return;
}
}
/** Print the message that checksum mismatch happened in
page header. */
inline void print_innodb_fail() const override {
if (!m_is_log_enabled) {
return;
}
fprintf(m_log_file,
"Fail; page %" PRIuMAX
" invalid (fails innodb and"
" crc32 checksum\n",
m_page_no);
}
/** Print both new-style, old-style & crc32 checksum values.
@param[in] checksum_field1 Checksum in page header
@param[in] checksum_field2 Checksum in page trailer */
inline void print_crc32_checksum(uint32_t checksum_field1,
uint32_t checksum_field2) const override {
if (m_is_log_enabled) {
fprintf(m_log_file,
"page::%" PRIuMAX "; old style: calculated = %" PRIu32
"; recorded = %" PRIu32 "\n",
m_page_no, buf_calc_page_old_checksum(m_read_buf),
checksum_field2);
fprintf(m_log_file,
"page::%" PRIuMAX "; new style: calculated = %" PRIu32
"; crc32 = %" PRIu32
";"
" recorded = %" PRIu32 "\n",
m_page_no, buf_calc_page_new_checksum(m_read_buf),
buf_calc_page_crc32(m_read_buf), checksum_field1);
}
}
/** Print a message that crc32 check failed. */
inline void print_crc32_fail() const override {
if (!m_is_log_enabled) {
return;
}
fprintf(m_log_file,
"Fail; page %" PRIuMAX " invalid (fails crc32 checksum)\n",
m_page_no);
}
/** Print checksum values on a compressed page.
@param[in] calc the calculated checksum value
@param[in] stored the stored checksum in header. */
inline void print_compressed_checksum(uint32_t calc,
uint32_t stored) const override {
if (!m_is_log_enabled) {
return;
}
fprintf(m_log_file,
"page::%" PRIuMAX
";"
" %s checksum: calculated = %" PRIu32
";"
" recorded = %" PRIu32 "\n",
m_page_no,
buf_checksum_algorithm_name(
static_cast<srv_checksum_algorithm_t>(srv_checksum_algorithm)),
calc, stored);
if (!m_strict_check) {
return;
}
const uint32_t crc32 = calc_zip_checksum(SRV_CHECKSUM_ALGORITHM_CRC32);
fprintf(m_log_file,
"page::%" PRIuMAX
": crc32 checksum:"
" calculated = %" PRIu32 "; recorded = %" PRIu32 "\n",
m_page_no, crc32, stored);
fprintf(m_log_file,
"page::%" PRIuMAX
": none checksum:"
" calculated = %" PRIu32 "; recorded = %" PRIu32 "\n",
m_page_no, BUF_NO_CHECKSUM_MAGIC, stored);
}
private:
bool m_strict_check;
bool m_is_log_enabled;
FILE *m_log_file;
uintmax_t m_page_no;
};
/** Check if page is corrupted or not.
@param[in] buf page frame
@param[in] page_size page size
@retval true if page is corrupted otherwise false. */
static bool is_page_corrupted(const byte *buf, const page_size_t &page_size) {
if (!page_size.is_compressed()) {
/* check the stored log sequence numbers
for uncompressed tablespace. */
const auto logseq = mach_read_from_4(buf + FIL_PAGE_LSN + 4);
const auto logseqfield = mach_read_from_4(buf + page_size.logical() -
FIL_PAGE_END_LSN_OLD_CHKSUM + 4);
if (is_log_enabled) {
fprintf(log_file,
"page::%" PRIuMAX "; log sequence number:first = %" PRIu32
"; second = %" PRIu32 "\n",
cur_page_num, logseq, logseqfield);
if (logseq != logseqfield) {
fprintf(log_file,
"Fail; page %" PRIuMAX
" invalid (fails log "
"sequence number check)\n",
cur_page_num);
}
}
}
InnocheckReporter reporter(true, buf, page_size, false, strict_check,
is_log_enabled, log_file);
return (reporter.is_corrupted());
}
/********************************************/ /*
Check if page is doublewrite buffer or not.
@param [in] page buffer page
@retval true if page is doublewrite buffer otherwise false.
*/
static bool is_page_doublewritebuffer(const byte *page) {
if ((cur_page_num >= FSP_EXTENT_SIZE) &&
(cur_page_num < FSP_EXTENT_SIZE * 3)) {
/* page is doublewrite buffer. */
return (true);
}
return (false);
}
/*******************************************************/ /*
Check if page is empty or not.
@param [in] page page to checked for empty.
@param [in] len size of page.
@retval true if page is empty.
@retval false if page is not empty.
*/
static bool is_page_empty(const byte *page, size_t len) {
while (len--) {
if (*page++) {
return (false);
}
}
return (true);
}
/** Rewrite the checksum for the page.
@param[in,out] page page buffer
@param[in] page_size page size in bytes on disk.
@retval true do rewrite
@retval false skip the rewrite as checksum stored
match with calculated or page is doublewrite buffer. */
static bool update_checksum(byte *page, const page_size_t &page_size) {
size_t physical_page_size = static_cast<size_t>(page_size.physical());
bool iscompressed = page_size.is_compressed();
uint32_t checksum = 0;
byte stored1[4]; /* get FIL_PAGE_SPACE_OR_CHKSUM field checksum */
byte stored2[4]; /* get FIL_PAGE_END_LSN_OLD_CHKSUM field checksum */
ut_ad(page);
/* If page is doublewrite buffer, skip the rewrite of checksum. */
if (skip_page) {
return (false);
}
memcpy(stored1, page + FIL_PAGE_SPACE_OR_CHKSUM, 4);
memcpy(stored2, page + physical_page_size - FIL_PAGE_END_LSN_OLD_CHKSUM, 4);
/* Check if page is empty, exclude the checksum field */
if (is_page_empty(page + 4, physical_page_size - 12) &&
is_page_empty(page + physical_page_size - 4, 4)) {
memset(page + FIL_PAGE_SPACE_OR_CHKSUM, 0, 4);
memset(page + physical_page_size - FIL_PAGE_END_LSN_OLD_CHKSUM, 0, 4);
goto func_exit;
}
if (iscompressed) {
/* page is compressed */
BlockReporter reporter = BlockReporter(false, page, page_size, false);
checksum = reporter.calc_zip_checksum(
static_cast<srv_checksum_algorithm_t>(write_check));
mach_write_to_4(page + FIL_PAGE_SPACE_OR_CHKSUM, checksum);
if (is_log_enabled) {
fprintf(log_file,
"page::%" PRIuMAX
"; Updated checksum ="
" %" PRIu32 "\n",
cur_page_num, checksum);
}
} else {
/* page is uncompressed. */
/* Store the new formula checksum */
switch ((srv_checksum_algorithm_t)write_check) {
case SRV_CHECKSUM_ALGORITHM_CRC32:
case SRV_CHECKSUM_ALGORITHM_STRICT_CRC32:
checksum = buf_calc_page_crc32(page);
break;
case SRV_CHECKSUM_ALGORITHM_INNODB:
case SRV_CHECKSUM_ALGORITHM_STRICT_INNODB:
checksum = (uint32_t)buf_calc_page_new_checksum(page);
break;
case SRV_CHECKSUM_ALGORITHM_NONE:
case SRV_CHECKSUM_ALGORITHM_STRICT_NONE:
checksum = BUF_NO_CHECKSUM_MAGIC;
break;
/* no default so the compiler will emit a warning if new
enum is added and not handled here */
}
mach_write_to_4(page + FIL_PAGE_SPACE_OR_CHKSUM, checksum);
if (is_log_enabled) {
fprintf(log_file,
"page::%" PRIuMAX
"; Updated checksum field1"
" = %" PRIu32 "\n",
cur_page_num, checksum);
}
if (write_check == SRV_CHECKSUM_ALGORITHM_STRICT_INNODB ||
write_check == SRV_CHECKSUM_ALGORITHM_INNODB) {
checksum = (uint32_t)buf_calc_page_old_checksum(page);
}
mach_write_to_4(page + physical_page_size - FIL_PAGE_END_LSN_OLD_CHKSUM,
checksum);
if (is_log_enabled) {
fprintf(log_file,
"page::%" PRIuMAX
"; Updated checksum "
"field2 = %" PRIu32 "\n",
cur_page_num, checksum);
}
}
func_exit:
/* The following code is to check the stored checksum with the
calculated checksum. If it matches, then return false to skip
the rewrite of checksum, otherwise return true. */
if (iscompressed) {
if (!memcmp(stored1, page + FIL_PAGE_SPACE_OR_CHKSUM, 4)) {
return (false);
}
return (true);
}
if (!memcmp(stored1, page + FIL_PAGE_SPACE_OR_CHKSUM, 4) &&
!memcmp(stored2, page + physical_page_size - FIL_PAGE_END_LSN_OLD_CHKSUM,
4)) {
return (false);
}
return (true);
}
/** Write the content to the file
@param[in] filename name of the file.
@param[in,out] file file pointer where content
have to be written
@param[in] buf file buffer read
@param[in,out] pos current file position.
@param[in] page_size page size
@retval true if successfully written
@retval false if a non-recoverable error occurred */
static bool write_file(const char *filename, FILE *file, byte *buf, fpos_t *pos,
const page_size_t &page_size) {
bool do_update;
ulint phys_page_size = page_size.physical();
do_update = update_checksum(buf, page_size);
if (file != stdin) {
if (do_update) {
/* Set the previous file pointer position
saved in pos to current file position. */
if (0 != fsetpos(file, pos)) {
perror("fsetpos");
return (false);
}
} else {
/* Store the current file position in pos */
if (0 != fgetpos(file, pos)) {
perror("fgetpos");
return (false);
}
return (true);
}
}
if (phys_page_size !=
fwrite(buf, 1, phys_page_size, file == stdin ? stdout : file)) {
fprintf(stderr, "Failed to write page %" PRIuMAX " to %s: %s\n",
cur_page_num, filename, strerror(errno));
return (false);
}
if (file != stdin) {
fflush(file);
/* Store the current file position in pos */
if (0 != fgetpos(file, pos)) {
perror("fgetpos");
return (false);
}
}
return (true);
}
/*
Parse the page and collect/dump the information about page type
@param [in] page buffer page
@param [in] file file for diagnosis.
*/
static void parse_page(const byte *page, FILE *file) {
unsigned long long id;
ulint undo_page_type;
char str[20] = {'\0'};
/* Check whether page is doublewrite buffer. */
if (skip_page) {
strcpy(str, "Double_write_buffer");
} else {
strcpy(str, "-");
}
switch (mach_read_from_2(page + FIL_PAGE_TYPE)) {
case FIL_PAGE_INDEX:
page_type.n_fil_page_index++;
id = mach_read_from_8(page + PAGE_HEADER + PAGE_INDEX_ID);
if (page_type_dump) {
fprintf(file,
"#::%8" PRIuMAX
"\t\t|\t\tIndex page\t\t\t|"
"\tindex id=%llu,",
cur_page_num, id);
fprintf(file,
" page level=" UINT16PF ", No. of records=" UINT16PF
", garbage=" UINT16PF ", %s\n",
page_header_get_field(page, PAGE_LEVEL),
page_header_get_field(page, PAGE_N_RECS),
page_header_get_field(page, PAGE_GARBAGE), str);
}
break;
case FIL_PAGE_SDI:
page_type.n_fil_page_sdi_index++;
id = mach_read_from_8(page + PAGE_HEADER + PAGE_INDEX_ID);
if (page_type_dump) {
fprintf(file,
"#::%8" PRIuMAX
"\t\t|\t\tSDI Index page"
"\t\t\t|\tindex id=%llu,",
cur_page_num, id);
fprintf(file,
" page level=" UINT16PF ", No. of records=" UINT16PF
", garbage=" UINT16PF ", %s\n",
page_header_get_field(page, PAGE_LEVEL),
page_header_get_field(page, PAGE_N_RECS),
page_header_get_field(page, PAGE_GARBAGE), str);
}
break;
case FIL_PAGE_UNDO_LOG:
page_type.n_fil_page_undo_log++;
undo_page_type =
mach_read_from_2(page + TRX_UNDO_PAGE_HDR + TRX_UNDO_PAGE_TYPE);
if (page_type_dump) {
fprintf(file, "#::%8" PRIuMAX "\t\t|\t\tUndo log page\t\t\t|",
cur_page_num);
}
if (undo_page_type == TRX_UNDO_INSERT) {
page_type.n_undo_insert++;
if (page_type_dump) {
fprintf(file, "\t%s", "Insert Undo log page");
}
} else if (undo_page_type == TRX_UNDO_UPDATE) {
page_type.n_undo_update++;
if (page_type_dump) {
fprintf(file, "\t%s", "Update undo log page");
}
}
undo_page_type =
mach_read_from_2(page + TRX_UNDO_SEG_HDR + TRX_UNDO_STATE);
switch (undo_page_type) {
case TRX_UNDO_ACTIVE:
page_type.n_undo_state_active++;
if (page_type_dump) {
fprintf(file, ", %s",
"Undo log of "
"an active transaction");
}
break;
case TRX_UNDO_CACHED:
page_type.n_undo_state_cached++;
if (page_type_dump) {
fprintf(file, ", %s",
"Page is "
"cached for quick reuse");
}
break;
case TRX_UNDO_TO_FREE:
page_type.n_undo_state_to_free++;
if (page_type_dump) {
fprintf(file, ", %s",
"Insert undo "
"segment that can be freed");
}
break;
case TRX_UNDO_TO_PURGE:
page_type.n_undo_state_to_purge++;
if (page_type_dump) {
fprintf(file, ", %s",
"Will be "
"freed in purge when all undo"
"data in it is removed");
}
break;
case TRX_UNDO_PREPARED_80028:
case TRX_UNDO_PREPARED:
case TRX_UNDO_PREPARED_IN_TC:
page_type.n_undo_state_prepared++;
if (page_type_dump) {
fprintf(file, ", %s",
"Undo log of "
"an prepared transaction");
}
break;
default:
page_type.n_undo_state_other++;
break;
}
if (page_type_dump) {
fprintf(file, ", %s\n", str);
}
break;
case FIL_PAGE_INODE:
page_type.n_fil_page_inode++;
if (page_type_dump) {
fprintf(file,
"#::%8" PRIuMAX