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/* 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
InnoDB page printer.
Written by Andrew Gaul <andrew@gaul.org>.
Published with permission.
*/
#include <inttypes.h>
#include <stdint.h>
#include "page0page.h"
#define COLUMN_NAME_FMT "%-32s"
static void print_page(uchar *p)
{
int type = mach_read_from_2(p + FIL_PAGE_TYPE);
if (type == FIL_PAGE_TYPE_ALLOCATED) {
return;
}
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_OFFSET",
mach_read_from_4(p + FIL_PAGE_OFFSET));
printf(COLUMN_NAME_FMT " 0x%08lX\n", "FIL_PAGE_SPACE_OR_CHKSUM",
mach_read_from_4(p + FIL_PAGE_SPACE_OR_CHKSUM));
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_PREV",
mach_read_from_4(p + FIL_PAGE_PREV));
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_NEXT",
mach_read_from_4(p + FIL_PAGE_NEXT));
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_LSN",
mach_read_from_4(p + FIL_PAGE_LSN));
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_TYPE",
mach_read_from_2(p + FIL_PAGE_TYPE));
dulint flush_lsn_tuple = mach_read_from_6(p + FIL_PAGE_FILE_FLUSH_LSN);
uint64_t flush_lsn = (((uint64_t) flush_lsn_tuple.high) << 32) +
flush_lsn_tuple.low;
printf(COLUMN_NAME_FMT " %" PRIu64 "\n", "FIL_PAGE_FILE_FLUSH_LSN",
flush_lsn);
printf(COLUMN_NAME_FMT " %ld\n", "FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID",
mach_read_from_4(p + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID));
printf(COLUMN_NAME_FMT " 0x%08lX\n", "FIL_PAGE_END_LSN_OLD_CHKSUM",
mach_read_from_4(p + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM));
uchar *pd = p + FIL_PAGE_DATA;
if (type == FIL_PAGE_TYPE_FSP_HDR) {
printf(COLUMN_NAME_FMT " %ld\n", "FSEG_HDR_SPACE",
mach_read_from_4(pd + FSEG_HDR_SPACE));
printf(COLUMN_NAME_FMT " %ld\n", "FSEG_HDR_PAGE_NO",
mach_read_from_4(pd + FSEG_HDR_PAGE_NO));
printf(COLUMN_NAME_FMT " %ld\n", "FSEG_HDR_OFFSET",
mach_read_from_4(pd + FSEG_HDR_OFFSET));
} else if (type == FIL_PAGE_INDEX) {
printf(COLUMN_NAME_FMT " 0x%lX\n", "PAGE_N_HEAP",
mach_read_from_2(pd + PAGE_N_HEAP));
printf(COLUMN_NAME_FMT " 0x%lX\n", "PAGE_FREE",
mach_read_from_2(pd + PAGE_FREE));
dulint index_id_tuple = mach_read_from_8(pd + PAGE_INDEX_ID);
uint64_t index_id = (((uint64_t) index_id_tuple.high) << 32) +
index_id_tuple.low;
printf(COLUMN_NAME_FMT " %" PRIu64 "\n", "PAGE_INDEX_ID",
index_id);
printf(COLUMN_NAME_FMT " %ld\n", "PAGE_BTR_SEG_LEAF",
mach_read_from_4(pd + PAGE_BTR_SEG_LEAF + FSEG_HDR_SPACE));
printf(COLUMN_NAME_FMT " %ld\n", "PAGE_BTR_SEG_TOP",
mach_read_from_4(pd + PAGE_BTR_SEG_TOP + FSEG_HDR_SPACE));
#if 0
int i;
for (i = 0; i < 80; i += 4) {
if (i == PAGE_BTR_SEG_LEAF ||
i == PAGE_N_HEAP ||
i == PAGE_INDEX_ID ||
i == PAGE_INDEX_ID + 4) {
continue;
}
char column_name[256];
snprintf(column_name, sizeof(column_name), "FIL_PAGE_DATA + %2d", i);
printf(COLUMN_NAME_FMT " %ld\n", column_name,
mach_read_from_4(p + FIL_PAGE_DATA + i));
}
#endif
}
printf("\n");
}
int main(int argc, char **argv)
{
FILE *f; /* our input file */
uchar *p; /* storage of pages read */
int bytes; /* bytes read count */
ulint ct; /* current page number (0 based) */
ulint start_page= 0, end_page= 0, use_end_page= 0; /* for starting and ending at certain pages */
off_t offset= 0;
int c;
int fd;
fpos_t pos;
/* remove arguments */
while ((c= getopt(argc, argv, "s:e:p:")) != -1)
{
switch (c)
{
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 ':':
fprintf(stderr, "option -%c requires an argument\n", optopt);
return 1;
break;
case '?':
fprintf(stderr, "unrecognized option: -%c\n", optopt);
return 1;
break;
}
}
/* make sure we have the right arguments */
if (optind >= argc)
{
printf("InnoDB page printer.\n");
printf("usage: [-s <start page>] [-e <end page>] [-p <page>] %s <filename>\n", argv[0]);
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");
return 1;
}
f = fopen(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;
}
offset= (off_t)start_page * (off_t)UNIV_PAGE_SIZE;
if (lseek(fd, offset, SEEK_SET) != offset)
{
perror("unable to seek to necessary offset");
return 1;
}
}
/* allocate buffer for reading (so we don't realloc every time) */
p= (uchar *)malloc(UNIV_PAGE_SIZE);
ct= start_page;
while (!feof(f))
{
fgetpos(f, &pos);
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;
}
print_page(p);
/* end if this was the last page we were supposed to check */
if (use_end_page && (ct >= end_page))
return 0;
ct++;
}
return 0;
}
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