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Added InnoDB offline file checksum utility.

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jan@hundin.mysql.fi 2005-07-19 10:03:19 +03:00
parent 98dc8e3242
commit 6aeca28a96
3 changed files with 304 additions and 1 deletions
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1
.bzrignore
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@ -1117,3 +1117,4 @@ vio/test-sslclient
vio/test-sslserver
vio/viotest-ssl
ndb/src/dummy.cpp
extra/innochecksum

2
extra/Makefile.am
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@ -38,7 +38,7 @@ $(top_builddir)/include/mysqld_ername.h: $(top_builddir)/include/mysqld_error.h
$(top_builddir)/include/sql_state.h: $(top_builddir)/include/mysqld_error.h
bin_PROGRAMS = replace comp_err perror resolveip my_print_defaults \
resolve_stack_dump mysql_waitpid
resolve_stack_dump mysql_waitpid innochecksum
noinst_PROGRAMS = charset2html
# Don't update the files from bitkeeper

302
extra/innochecksum.c Normal file
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@ -0,0 +1,302 @@
/* Copyright (C) 2000-2005 MySQL AB & Innobase Oy
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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
InnoDB offline file checksum utility. 85% of the code in this file
was taken wholesale fron the InnoDB codebase.
The final 15% was originally written by Mark Smith of Danga
Interactive, Inc. <junior@danga.com>
Published with a permission.
*/
// needed to have access to 64 bit file functions
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
// all of these ripped from InnoDB code from MySQL 4.0.22
#define UT_HASH_RANDOM_MASK 1463735687
#define UT_HASH_RANDOM_MASK2 1653893711
#define FIL_PAGE_LSN 16
#define FIL_PAGE_FILE_FLUSH_LSN 26
#define FIL_PAGE_OFFSET 4
#define FIL_PAGE_DATA 38
#define FIL_PAGE_END_LSN_OLD_CHKSUM 8
#define FIL_PAGE_SPACE_OR_CHKSUM 0
#define UNIV_PAGE_SIZE (2 * 8192)
// command line argument to do page checks (that's it)
// another argument to specify page ranges... seek to right spot and go from there
typedef unsigned long int ulint;
typedef unsigned char byte;
/* innodb function in name; modified slightly to not have the ASM version (lots of #ifs that didn't apply) */
ulint mach_read_from_4(byte *b) {
return( ((ulint)(b[0]) << 24)
+ ((ulint)(b[1]) << 16)
+ ((ulint)(b[2]) << 8)
+ (ulint)(b[3])
);
}
ulint
ut_fold_ulint_pair(
/*===============*/
/* out: folded value */
ulint n1, /* in: ulint */
ulint n2) /* in: ulint */
{
return(((((n1 ^ n2 ^ UT_HASH_RANDOM_MASK2) << 8) + n1)
^ UT_HASH_RANDOM_MASK) + n2);
}
ulint
ut_fold_binary(
/*===========*/
/* out: folded value */
byte* str, /* in: string of bytes */
ulint len) /* in: length */
{
ulint i;
ulint fold = 0;
for (i = 0; i < len; i++) {
fold = ut_fold_ulint_pair(fold, (ulint)(*str));
str++;
}
return(fold);
}
ulint
buf_calc_page_new_checksum(
/*=======================*/
/* out: checksum */
byte* page) /* in: buffer page */
{
ulint checksum;
/* Since the fields FIL_PAGE_FILE_FLUSH_LSN and ..._ARCH_LOG_NO
are written outside the buffer pool to the first pages of data
files, we have to skip them in the page checksum calculation.
We must also skip the field FIL_PAGE_SPACE_OR_CHKSUM where the
checksum is stored, and also the last 8 bytes of page because
there we store the old formula checksum. */
checksum = ut_fold_binary(page + FIL_PAGE_OFFSET,
FIL_PAGE_FILE_FLUSH_LSN - FIL_PAGE_OFFSET)
+ ut_fold_binary(page + FIL_PAGE_DATA,
UNIV_PAGE_SIZE - FIL_PAGE_DATA
- FIL_PAGE_END_LSN_OLD_CHKSUM);
checksum = checksum & 0xFFFFFFFF;
return(checksum);
}
ulint
buf_calc_page_old_checksum(
/*=======================*/
/* out: checksum */
byte* page) /* in: buffer page */
{
ulint checksum;
checksum = ut_fold_binary(page, FIL_PAGE_FILE_FLUSH_LSN);
checksum = checksum & 0xFFFFFFFF;
return(checksum);
}
int main(int argc, char **argv) {
FILE *f; // our input file
byte *p; // storage of pages read
int bytes; // bytes read count
ulint ct; // current page number (0 based)
int now; // current time
int lastt; // last time
ulint oldcsum, oldcsumfield, csum, csumfield, logseq, logseqfield; // ulints for checksum storage
struct stat64 st; // for stat, if you couldn't guess
unsigned long long int size; // size of file (has to be 64 bits)
ulint pages; // number of pages in file
ulint start_page = 0, end_page = 0, use_end_page = 0; // for starting and ending at certain pages
int just_count = 0; // if true, just print page count
int verbose = 0;
int debug = 0;
int c;
int fd;
// remove arguments
while ((c = getopt(argc, argv, "cvds:e:p:")) != -1) {
switch (c) {
case 'v':
verbose = 1;
break;
case 'c':
just_count = 1;
break;
case 's':
start_page = atoi(optarg);
break;
case 'e':
end_page = atoi(optarg);
use_end_page = 1;
break;
case 'p':
start_page = atoi(optarg);
end_page = atoi(optarg);
use_end_page = 1;
break;
case 'd':
debug = 1;
break;
case ':':
fprintf(stderr, "option -%c requires an argument\n", optopt);
return 1;
break;
case '?':
fprintf(stderr, "unrecognized option: -%c\n", optopt);
return 1;
break;
}
}
// debug implies verbose...
if (debug) verbose = 1;
// make sure we have the right arguments
if (optind >= argc) {
printf("InnoDB offline file checksum utility.\n");
printf("usage: %s [-c] [-s <start page>] [-e <end page>] [-p <page>] [-v] [-d] <filename>\n", argv[0]);
printf("\t-c\tprint the count of pages in the file\n");
printf("\t-s n\tstart on this page number (0 based)\n");
printf("\t-e n\tend at this page number (0 based)\n");
printf("\t-p n\tcheck only this page (0 based)\n");
printf("\t-v\tverbose (prints progress every 5 seconds)\n");
printf("\t-d\tdebug mode (prints checksums for each page)\n");
return 1;
}
// stat the file to get size and page count
if (stat64(argv[optind], &st)) {
perror("error statting file");
return 1;
}
size = st.st_size;
pages = size / UNIV_PAGE_SIZE;
if (just_count) {
printf("%lu\n", pages);
return 0;
} else if (verbose) {
printf("file %s = %llu bytes (%lu pages)...\n", argv[1], size, pages);
printf("checking pages in range %lu to %lu\n", start_page, use_end_page ? end_page : (pages - 1));
}
// open the file for reading
f = fopen64(argv[optind], "r");
if (!f) {
perror("error opening file");
return 1;
}
// seek to the necessary position
if (start_page) {
fd = fileno(f);
if (!fd) {
perror("unable to obtain file descriptor number");
return 1;
}
if (lseek64(fd, start_page * UNIV_PAGE_SIZE, SEEK_SET) != (start_page * UNIV_PAGE_SIZE)) {
perror("unable to seek to necessary offset");
return 1;
}
}
// allocate buffer for reading (so we don't realloc every time)
p = (byte *)malloc(UNIV_PAGE_SIZE);
// main checksumming loop
ct = start_page;
lastt = 0;
while (!feof(f)) {
bytes = fread(p, 1, UNIV_PAGE_SIZE, f);
if (!bytes && feof(f)) return 0;
if (bytes != UNIV_PAGE_SIZE) {
fprintf(stderr, "bytes read (%d) doesn't match universal page size (%d)\n", bytes, UNIV_PAGE_SIZE);
return 1;
}
// check the "stored log sequence numbers"
logseq = mach_read_from_4(p + FIL_PAGE_LSN + 4);
logseqfield = mach_read_from_4(p + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM + 4);
if (debug)
printf("page %lu: log sequence number: first = %lu; second = %lu\n", ct, logseq, logseqfield);
if (logseq != logseqfield) {
fprintf(stderr, "page %lu invalid (fails log sequence number check)\n", ct);
return 1;
}
// check old method of checksumming
oldcsum = buf_calc_page_old_checksum(p);
oldcsumfield = mach_read_from_4(p + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM);
if (debug)
printf("page %lu: old style: calculated = %lu; recorded = %lu\n", ct, oldcsum, oldcsumfield);
if (oldcsumfield != mach_read_from_4(p + FIL_PAGE_LSN) && oldcsumfield != oldcsum) {
fprintf(stderr, "page %lu invalid (fails old style checksum)\n", ct);
return 1;
}
// now check the new method
csum = buf_calc_page_new_checksum(p);
csumfield = mach_read_from_4(p + FIL_PAGE_SPACE_OR_CHKSUM);
if (debug)
printf("page %lu: new style: calculated = %lu; recorded = %lu\n", ct, csum, csumfield);
if (csumfield != 0 && csum != csumfield) {
fprintf(stderr, "page %lu invalid (fails new style checksum)\n", ct);
return 1;
}
// end if this was the last page we were supposed to check
if (use_end_page && (ct >= end_page))
return 0;
// do counter increase and progress printing
ct++;
if (verbose) {
if (ct % 64 == 0) {
now = time(0);
if (!lastt) lastt = now;
if (now - lastt >= 1) {
printf("page %lu okay: %.3f%% done\n", (ct - 1), (float) ct / pages * 100);
lastt = now;
}
}
}
}
return 0;
}