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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 tablespace, table, and index id renamer.
Written by Andrew Gaul <andrew@gaul.org>.
Published with permission.
*/
/* TODO: batch IO */
/* TODO: requires innodb_file_per_table; confused tablespace and table id */
#include <inttypes.h>
#include <stdint.h>
#include <unistd.h>
#include "page0page.h"
#include "innochecksum.h"
static void usage(const char *progname)
{
printf("InnoDB tablespace, table, and index id renamer.\n"
"usage: %s [OPTIONS]... FILENAME\n"
"\t-t ID\tset new tablespace id\n"
"\t-I ID\tmap from this index id\n"
"\t-i ID\tmap to this index id\n"
"\t-v\tverbose output\n",
progname);
}
static uint64_t dulint_to_uint64_t(dulint x)
{
return (((uint64_t) x.high) << 32) | x.low;
}
static void write_page(FILE *file, fpos_t pos, const uchar *page)
{
if (0 != fsetpos(file, &pos)) {
perror("couldn't set a position to the start of the page");
exit(1);
}
if (1 != fwrite(page, UNIV_PAGE_SIZE, 1, file)) {
perror("couldn't update the page");
exit(1);
}
}
int main(int argc, char **argv)
{
FILE *file = NULL; /* input file */
uchar *page = (uchar *)malloc(UNIV_PAGE_SIZE); /* storage for pages read */
int bytes; /* bytes read count */
ulint page_no = 0; /* current page number (0-based) */
int32_t tablespace_id_to = -1;
int64_t *index_id_from = malloc(0);
size_t index_id_from_size = 0;
int64_t *index_id_to = malloc(0);
size_t index_id_to_size = 0;
int64_t index_id;
size_t i;
int verbose = 0;
int c;
char *endptr;
fpos_t pos;
int retval = EXIT_FAILURE;
/* parse arguments */
while ((c = getopt(argc, argv, "hvt:I:i:")) != -1) {
switch (c) {
case 'v':
verbose = 1;
break;
case 't':
tablespace_id_to = strtol(optarg, &endptr, 10);
if (*endptr != '\0') {
fprintf(stderr, "invalid value %s\n", optarg);
goto out;
}
break;
case 'I':
index_id = strtoll(optarg, &endptr, 10);
if (*endptr != '\0') {
fprintf(stderr, "invalid value %s\n", optarg);
goto out;
}
index_id_from = realloc(index_id_from,
sizeof(*index_id_from) * (index_id_from_size + 1));
index_id_from[index_id_from_size++] = index_id;
break;
case 'i':
index_id = strtoll(optarg, &endptr, 10);
if (*endptr != '\0') {
fprintf(stderr, "invalid value %s\n", optarg);
goto out;
}
index_id_to = realloc(index_id_to,
sizeof(*index_id_to) * (index_id_to_size + 1));
index_id_to[index_id_to_size++] = index_id;
break;
case ':':
fprintf(stderr, "option -%c requires an argument\n", optopt);
goto out;
case '?':
fprintf(stderr, "unrecognized option: -%c\n", optopt);
goto out;
case 'h':
default:
usage(argv[0]);
goto out;
}
}
/* make sure we have the right arguments */
if (optind >= argc) {
usage(argv[0]);
goto out;
}
if (index_id_from_size != index_id_to_size) {
fprintf(stderr, "Mismatched -T and -t parameters.\n");
goto out;
}
file = fopen(argv[optind], "r+");
if (!file) {
perror("error opening file");
goto out;
}
while (!feof(file)) {
fgetpos(file, &pos);
bytes = fread(page, 1, UNIV_PAGE_SIZE, file);
if (!bytes && feof(file)) break;
if (bytes != UNIV_PAGE_SIZE) {
fprintf(stderr,
"bytes read (%d) does not match universal page size (%d)\n",
bytes, UNIV_PAGE_SIZE);
goto out;
}
uint16_t type = mach_read_from_2(page + FIL_PAGE_TYPE);
uint32_t id = mach_read_from_4((uchar*)&tablespace_id_to);
int modified = FALSE;
if (type != FIL_PAGE_TYPE_ALLOCATED) {
if (tablespace_id_to != -1) {
if (verbose) {
printf("changing tablespace id from %lu to %u at page %lu\n",
mach_read_from_4(page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID),
tablespace_id_to, page_no);
}
memcpy(page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, &id, sizeof(id));
modified = TRUE;
}
}
if (type == FIL_PAGE_TYPE_FSP_HDR) {
if (tablespace_id_to != -1) {
memcpy(page + FIL_PAGE_DATA + FSEG_HDR_SPACE, &id, sizeof(id));
modified = TRUE;
}
} else if (type == FIL_PAGE_INDEX) {
uint64_t on_disk_index_id = dulint_to_uint64_t(mach_read_from_8(
page + FIL_PAGE_DATA + PAGE_INDEX_ID));
for (i = 0; i < index_id_from_size; ++i) {
if (on_disk_index_id == index_id_from[i]) {
if (verbose) {
printf("changing index id from %" PRIu64 " to %" PRIi64
" at page %lu\n", index_id_from[i], index_id_to[i], page_no);
}
uint64_t index_id_to_swapped = dulint_to_uint64_t(mach_read_from_8(
(uchar*)&index_id_to[i]));
memcpy(page + FIL_PAGE_DATA + PAGE_INDEX_ID, &index_id_to_swapped,
sizeof(index_id_to_swapped));
modified = TRUE;
break;
}
}
if (tablespace_id_to != -1) {
memcpy(page + FIL_PAGE_DATA + FSEG_HDR_SPACE + PAGE_BTR_SEG_LEAF, &id,
sizeof(id));
memcpy(page + FIL_PAGE_DATA + FSEG_HDR_SPACE + PAGE_BTR_SEG_TOP, &id,
sizeof(id));
modified = TRUE;
}
}
if (modified) {
/* recalculate new-style checksum */
uint32_t new_checksum = buf_calc_page_new_checksum(page);
new_checksum = mach_read_from_4((uchar *)&new_checksum);
memcpy(page + FIL_PAGE_SPACE_OR_CHKSUM, &new_checksum,
sizeof(new_checksum));
/* recalculate old-style checksum */
uint32_t old_checksum = buf_calc_page_old_checksum(page);
old_checksum = mach_read_from_4((uchar *)&old_checksum);
memcpy(page + UNIV_PAGE_SIZE - FIL_PAGE_END_LSN_OLD_CHKSUM, &old_checksum,
sizeof(old_checksum));
write_page(file, pos, page);
}
++page_no;
}
retval = EXIT_SUCCESS;
out:
free(index_id_from);
free(index_id_to);
free(page);
if (file != NULL) {
fclose(file);
}
return retval;
}
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