/
innochecksum.cc
1979 lines (1725 loc) · 50 KB
/
innochecksum.cc
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/*
Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2014, 2017, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin 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 <my_global.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <my_getopt.h>
#include <m_string.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 "univ.i" /* include all of this */
#include "page0size.h" /* page_size_t */
#include "page0zip.h" /* page_zip_calc_checksum() */
#include "page0page.h" /* PAGE_* */
#include "trx0undo.h" /* TRX_UNDO_* */
#include "fut0lst.h" /* FLST_NODE_SIZE */
#include "buf0checksum.h" /* buf_calc_page_*() */
#include "fil0fil.h" /* FIL_* */
#include "os0file.h"
#include "fsp0fsp.h" /* fsp_flags_get_page_size() &
fsp_flags_get_zip_size() */
#include "mach0data.h" /* mach_read_from_4() */
#include "ut0crc32.h" /* ut_crc32_init() */
#include "fsp0pagecompress.h" /* fil_get_compression_alg_name */
#include "ut0byte.h"
#include "mach0data.h"
#ifdef UNIV_NONINL
# include "fsp0fsp.ic"
# include "mach0data.ic"
# include "ut0rnd.ic"
#endif
#ifndef PRIuMAX
#define PRIuMAX "llu"
#endif
/*********************************************************************
Verify checksum for a page (iff it's encrypted)
NOTE: currently this function can only be run in single threaded mode
as it modifies srv_checksum_algorithm (temporarily)
@param[in] src_fame page to verify
@param[in] page_size page_size
@param[in] page_no page number of given read_buf
@param[in] strict_check true if strict-check option is enabled
@return true if page is encrypted AND OK, false otherwise */
UNIV_INTERN
bool
fil_space_verify_crypt_checksum(
/*============================*/
const byte* src_frame, /*!< in: page the verify */
const page_size_t& page_size /*!< in: page size */
,uintmax_t page_no,
bool strict_check);
/* 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;
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 = 0;
/* 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 = 0;
/* skip the checksum verification & rewrite if page is doublewrite buffer. */
static bool skip_page = 0;
const char *dbug_setting = "FALSE";
char* log_filename = NULL;
/* User defined filename for logging. */
FILE* log_file = NULL;
/* Enabled for log write option. */
static bool is_log_enabled = false;
static my_bool do_leaf;
static ulong n_merge;
#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_type_page_compressed;
int n_fil_page_type_page_compressed_encrypted;
} 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, NULL
};
#define SIZE_RANGES_FOR_PAGE 10
#define NUM_RETRIES 3
#define DEFAULT_RETRY_DELAY 1000000
struct per_page_stats {
ulint n_recs;
ulint data_size;
ulint left_page_no;
ulint right_page_no;
per_page_stats(ulint n, ulint data, ulint left, ulint right) :
n_recs(n), data_size(data), left_page_no(left), right_page_no(right) {}
per_page_stats() : n_recs(0), data_size(0), left_page_no(0), right_page_no(0) {}
};
struct per_index_stats {
unsigned long long pages;
unsigned long long leaf_pages;
ulint first_leaf_page;
ulint count;
ulint free_pages;
ulint max_data_size;
unsigned long long total_n_recs;
unsigned long long total_data_bytes;
/*!< first element for empty pages,
last element for pages with more than logical_page_size */
unsigned long long pages_in_size_range[SIZE_RANGES_FOR_PAGE+2];
std::map<unsigned long long, per_page_stats> leaves;
per_index_stats():pages(0), leaf_pages(0), first_leaf_page(0),
count(0), free_pages(0), max_data_size(0), total_n_recs(0),
total_data_bytes(0)
{
memset(pages_in_size_range, 0, sizeof(pages_in_size_range));
}
};
std::map<unsigned long long, per_index_stats> index_ids;
bool encrypted = false;
ulint
page_is_comp(
/*=========*/
const page_t* page) /*!< in: index page */
{
return(page_header_get_field(page, PAGE_N_HEAP) & 0x8000);
}
bool
page_is_leaf(
/*=========*/
const page_t* page) /*!< in: page */
{
return(!*(const uint16*) (page + (PAGE_HEADER + PAGE_LEVEL)));
}
ulint
page_get_page_no(
/*=============*/
const page_t* page) /*!< in: page */
{
return(mach_read_from_4(page + FIL_PAGE_OFFSET));
}
#define FSEG_HEADER_SIZE 10 /*!< Length of the file system
header, in bytes */
#define REC_N_NEW_EXTRA_BYTES 5
#define REC_N_OLD_EXTRA_BYTES 6
#define PAGE_DATA (PAGE_HEADER + 36 + 2 * FSEG_HEADER_SIZE)
/* start of data on the page */
#define PAGE_NEW_SUPREMUM (PAGE_DATA + 2 * REC_N_NEW_EXTRA_BYTES + 8)
/* offset of the page supremum record on a
new-style compact page */
#define PAGE_NEW_SUPREMUM_END (PAGE_NEW_SUPREMUM + 8)
#define PAGE_OLD_SUPREMUM (PAGE_DATA + 2 + 2 * REC_N_OLD_EXTRA_BYTES + 8)
/* offset of the page supremum record on an
old-style page */
#define PAGE_OLD_SUPREMUM_END (PAGE_OLD_SUPREMUM + 9)
/* offset of the page supremum record end on
an old-style page */
#define FLST_BASE_NODE_SIZE (4 + 2 * 6)
#define XDES_ARR_OFFSET (FSP_HEADER_OFFSET + FSP_HEADER_SIZE)
#define XDES_FREE_BIT 0
#define XDES_BITMAP (FLST_NODE_SIZE + 12)
#define XDES_BITS_PER_PAGE 2
#define UT_BITS_IN_BYTES(b) (((b) + 7) / 8)
#define XDES_SIZE \
(XDES_BITMAP \
+ UT_BITS_IN_BYTES(FSP_EXTENT_SIZE * XDES_BITS_PER_PAGE))
ulint
page_get_data_size(
/*===============*/
const page_t* page) /*!< in: index page */
{
ulint ret;
ret = (ulint)(page_header_get_field(page, PAGE_HEAP_TOP)
- (page_is_comp(page)
? PAGE_NEW_SUPREMUM_END
: PAGE_OLD_SUPREMUM_END)
- page_header_get_field(page, PAGE_GARBAGE));
ut_ad(ret < UNIV_PAGE_SIZE);
return(ret);
}
void print_index_leaf_stats(
unsigned long long id,
const per_index_stats& index,
FILE* fil_out)
{
ulint page_no = index.first_leaf_page;
std::map<unsigned long long, per_page_stats>::const_iterator it_page = index.leaves.find(page_no);
fprintf(fil_out, "\nindex: %llu leaf page stats: n_pages = %llu\n",
id, index.leaf_pages);
fprintf(fil_out, "page_no\tdata_size\tn_recs\n");
while (it_page != index.leaves.end()) {
const per_page_stats& stat = it_page->second;
fprintf(fil_out, "%llu\t%lu\t%lu\n", it_page->first, stat.data_size, stat.n_recs);
page_no = stat.right_page_no;
it_page = index.leaves.find(page_no);
}
}
void defrag_analysis(
unsigned long long id,
const per_index_stats& index,
FILE* fil_out)
{
// TODO: make it work for compressed pages too
std::map<unsigned long long, per_page_stats>::const_iterator it = index.leaves.find(index.first_leaf_page);
ulint n_pages = 0;
ulint n_leaf_pages = 0;
while (it != index.leaves.end()) {
ulint data_size_total = 0;
for (ulong i = 0; i < n_merge; i++) {
const per_page_stats& stat = it->second;
n_leaf_pages ++;
data_size_total += stat.data_size;
it = index.leaves.find(stat.right_page_no);
if (it == index.leaves.end()) {
break;
}
}
if (index.max_data_size) {
n_pages += data_size_total / index.max_data_size;
if (data_size_total % index.max_data_size != 0) {
n_pages += 1;
}
}
}
if (index.leaf_pages) {
fprintf(fil_out, "count = %lu free = %lu\n", index.count, index.free_pages);
}
fprintf(fil_out, "%llu\t\t%llu\t\t%lu\t\t%lu\t\t%lu\t\t%.2f\t%lu\n",
id, index.leaf_pages, n_leaf_pages, n_merge, n_pages,
1.0 - (double)n_pages / (double)n_leaf_pages, index.max_data_size);
}
void print_leaf_stats(
FILE* fil_out)
{
fprintf(fil_out, "\n**************************************************\n");
fprintf(fil_out, "index_id\t#leaf_pages\t#actual_leaf_pages\tn_merge\t"
"#leaf_after_merge\tdefrag\n");
for (std::map<unsigned long long, per_index_stats>::const_iterator it = index_ids.begin();
it != index_ids.end(); it++) {
const per_index_stats& index = it->second;
if (verbose) {
print_index_leaf_stats(it->first, index, fil_out);
}
if (n_merge) {
defrag_analysis(it->first, index, fil_out);
}
}
}
/** 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);
}
univ_page_size.copy_from(
page_size_t(srv_page_size, srv_page_size, false));
return(page_size_t(flags));
}
#ifdef MYSQL_COMPRESSION
/** 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);
}
#endif
#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,
NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)err_msg, sizeof(err_msg), NULL );
return (err_msg);
}
#endif /* _WIN32 */
/***********************************************//*
@param>>_______[in] name>_____name of file.
@retval file pointer; file pointer is NULL when error occured.
*/
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, NULL,
OPEN_EXISTING, NULL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
/* print the error message. */
fprintf(stderr, "Filename::%s %s\n", name,
error_message(GetLastError()));
return (NULL);
}
/* 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 (NULL);
}
#endif /* _WIN32 */
if (do_write) {
fil_in = fdopen(fd, "rb+");
} else {
fil_in = fdopen(fd, "rb");
}
return (fil_in);
}
/************************************************************//*
Read the content 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] physical_page_size Physical/Commpressed page size.
@param [in,out] fil_in file pointer created for the
tablespace.
@retval no. of bytes read.
*/
ulong read_file(
byte* buf,
bool partial_page_read,
ulong physical_page_size,
FILE* fil_in)
{
ulong bytes = 0;
DBUG_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;
}
bytes += ulong(fread(buf, 1, physical_page_size, fil_in));
return bytes;
}
/** 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)
{
/* enable if page is corrupted. */
bool is_corrupted;
/* use to store LSN values. */
ulint logseq;
ulint logseqfield;
if (!page_size.is_compressed()) {
/* check the stored log sequence numbers
for uncompressed tablespace. */
logseq = mach_read_from_4(buf + FIL_PAGE_LSN + 4);
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 = " ULINTPF
"; second = " ULINTPF "\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);
}
}
}
/* If page is encrypted, use different checksum calculation
as innochecksum can't decrypt pages. Note that some old InnoDB
versions did not initialize FIL_PAGE_FILE_FLUSH_LSN field
so if crypt checksum does not match we verify checksum using
normal method.
*/
if (mach_read_from_4(buf+FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION) != 0) {
is_corrupted = fil_space_verify_crypt_checksum(buf, page_size,
cur_page_num, strict_verify);
} else {
is_corrupted = true;
}
if (is_corrupted) {
is_corrupted = buf_page_is_corrupted(
true, buf, page_size, false,
cur_page_num, strict_verify,
is_log_enabled, log_file);
}
return(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] physical_page_size page size in bytes on disk.
@param [in] iscompressed Is compressed/Uncompressed Page.
@retval true : do rewrite
@retval false : skip the rewrite as checksum stored match with
calculated or page is doublwrite buffer.
*/
bool
update_checksum(
byte* page,
ulong physical_page_size,
bool iscompressed)
{
ib_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 */
checksum = page_zip_calc_checksum(
page, physical_page_size,
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 ="
" %u\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 = (ib_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"
" = %u\n", cur_page_num, checksum);
}
if (write_check == SRV_CHECKSUM_ALGORITHM_STRICT_INNODB
|| write_check == SRV_CHECKSUM_ALGORITHM_INNODB) {
checksum = (ib_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 = %u\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] compressed Enabled if tablespace is
compressed.
@param[in,out] pos current file position.
@param[in] page_size page size in bytes on disk.
@retval true if successfully written
@retval false if a non-recoverable error occurred
*/
static
bool
write_file(
const char* filename,
FILE* file,
byte* buf,
bool compressed,
fpos_t* pos,
ulong page_size)
{
bool do_update;
do_update = update_checksum(buf, page_size, compressed);
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 (page_size
!= fwrite(buf, 1, 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);
}
/********************************************************//**
Gets the next index page number.
@return next page number */
ulint
btr_page_get_next(
/*==============*/
const page_t* page) /*!< in: index page */
{
return(mach_read_from_4(page + FIL_PAGE_NEXT));
}
/********************************************************//**
Gets the previous index page number.
@return prev page number */
ulint
btr_page_get_prev(
/*==============*/
const page_t* page) /*!< in: index page */
{
return(mach_read_from_4(page + FIL_PAGE_PREV));
}
ulint
mach_read_ulint(
const byte* ptr,
mlog_id_t type)
{
switch (type) {
case MLOG_1BYTE:
return(mach_read_from_1(ptr));
case MLOG_2BYTES:
return(mach_read_from_2(ptr));
case MLOG_4BYTES:
return(mach_read_from_4(ptr));
default:
break;
}
ut_error;
return(0);
}
ibool
xdes_get_bit(
/*=========*/
const xdes_t* descr, /*!< in: descriptor */
ulint bit, /*!< in: XDES_FREE_BIT or XDES_CLEAN_BIT */
ulint offset) /*!< in: page offset within extent:
0 ... FSP_EXTENT_SIZE - 1 */
{
ulint index = bit + XDES_BITS_PER_PAGE * offset;
ulint bit_index = index % 8;
ulint byte_index = index / 8;
return(ut_bit_get_nth(
mach_read_ulint(descr + XDES_BITMAP + byte_index,
MLOG_1BYTE),
bit_index));
}
/*
Parse the page and collect/dump the information about page type
@param [in] page buffer page
@param [in] xdes xdes page
@param [in] file file for diagnosis.
@param [in] page_size page size
*/
void
parse_page(
const byte* page,
const byte* xdes,
FILE* file,
page_size_t page_size)
{
unsigned long long id=0;
ulint undo_page_type=0;
ulint n_recs;
ulint page_no=0;
ulint right_page_no=0;
ulint left_page_no=0;
ulint data_bytes=0;
bool is_leaf=false;
ulint size_range_id=0;
ulint data_types=0;
ulint key_version = 0;
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);
n_recs = page_header_get_field(page, PAGE_N_RECS);
page_no = page_get_page_no(page);
left_page_no = btr_page_get_prev(page);
right_page_no = btr_page_get_next(page);
key_version = mach_read_from_4(page + FIL_PAGE_FILE_FLUSH_LSN_OR_KEY_VERSION);
/* If page is encrypted we can't read index header */
if (!key_version) {
data_bytes = page_get_data_size(page);
} else {
data_bytes = 0;
}
is_leaf = page_is_leaf(page);
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=" ULINTPF " leaf %u"
", No. of records=" ULINTPF
", garbage=" ULINTPF
", n_recs=" ULINTPF
", %s\n",
page_header_get_field(page, PAGE_LEVEL),
is_leaf,
n_recs,
page_header_get_field(page, PAGE_GARBAGE),
data_types,
str);
}
size_range_id = (data_bytes * SIZE_RANGES_FOR_PAGE
+ page_size.logical() - 1) /
page_size.logical();
if (size_range_id > SIZE_RANGES_FOR_PAGE + 1) {
/* data_bytes is bigger than logical_page_size */
size_range_id = SIZE_RANGES_FOR_PAGE + 1;
}
/* update per-index statistics */
{
if (index_ids.count(id) == 0) {
index_ids[id] = per_index_stats();
}
std::map<unsigned long long, per_index_stats>::iterator it;
it = index_ids.find(id);
per_index_stats &index = (it->second);
uchar* des = (uchar *)(xdes + XDES_ARR_OFFSET
+ XDES_SIZE * ((page_no & (page_size.physical() - 1))
/ FSP_EXTENT_SIZE));
if (xdes_get_bit(des, XDES_FREE_BIT,
page_no % FSP_EXTENT_SIZE)) {
index.free_pages++;
return;
}
index.pages++;
if (is_leaf) {