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/*
* Copyright (C) 2001 Sistina Software
*
* This LVM library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This LVM library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this LVM library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include "dbg_malloc.h"
#include "log.h"
#include "dev-cache.h"
#include "metadata.h"
#include "device.h"
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/genhd.h>
#if 0
int _get_partition_type(struct dev_filter *filter, struct device *d);
#define MINOR_PART(dm, d) (MINOR((d)->dev) % dev_max_partitions(dm, (d)->dev))
int is_whole_disk(struct dev_filter *filter, struct device *d)
{
return (MINOR_PART(dm, d)) ? 0 : 1;
}
int is_extended_partition(struct dev_mgr *dm, struct device *d)
{
return (MINOR_PART(dm, d) > 4) ? 1 : 0;
}
struct device *dev_primary(struct dev_mgr *dm, struct device *d)
{
struct device *ret;
ret = dev_by_dev(dm, d->dev - MINOR_PART(dm, d));
/* FIXME: Needs replacing with a 'refresh' */
if (!ret) {
init_dev_scan(dm);
ret = dev_by_dev(dm, d->dev - MINOR_PART(dm, d));
}
return ret;
}
int partition_type_is_lvm(struct dev_mgr *dm, struct device *d)
{
int pt;
pt = _get_partition_type(dm, d);
if (!pt) {
if (is_whole_disk(dm, d))
/* FIXME: Overloaded pt=0 in error cases */
return 1;
else {
log_error
("%s: missing partition table "
"on partitioned device", d->name);
return 0;
}
}
if (is_whole_disk(dm, d)) {
log_error("%s: looks to possess partition table", d->name);
return 0;
}
/* check part type */
if (pt != LVM_PARTITION && pt != LVM_NEW_PARTITION) {
log_error("%s: invalid partition type 0x%x "
"(must be 0x%x)", d->name, pt, LVM_NEW_PARTITION);
return 0;
}
if (pt == LVM_PARTITION) {
log_error
("%s: old LVM partition type found - please change to 0x%x",
d->name, LVM_NEW_PARTITION);
return 0;
}
return 1;
}
int _get_partition_type(struct dev_mgr *dm, struct device *d)
{
int pv_handle = -1;
struct device *primary;
ssize_t read_ret;
ssize_t bytes_read = 0;
char *buffer;
unsigned short *s_buffer;
struct partition *part;
loff_t offset = 0;
loff_t extended_offset = 0;
int part_sought;
int part_found = 0;
int first_partition = 1;
int extended_partition = 0;
int p;
if (!(primary = dev_primary(dm, d))) {
log_error
("Failed to find main device containing partition %s",
d->name);
return 0;
}
if (!(buffer = dbg_malloc(SECTOR_SIZE))) {
log_error("Failed to allocate partition table buffer");
return 0;
}
/* Get partition table */
if ((pv_handle = open(primary->name, O_RDONLY)) < 0) {
log_error("%s: open failed: %s", primary->name,
strerror(errno));
return 0;
}
s_buffer = (unsigned short *) buffer;
part = (struct partition *) (buffer + 0x1be);
part_sought = MINOR_PART(dm, d);
do {
bytes_read = 0;
if (llseek(pv_handle, offset * SECTOR_SIZE, SEEK_SET) == -1) {
log_error("%s: llseek failed: %s",
primary->name, strerror(errno));
return 0;
}
while ((bytes_read < SECTOR_SIZE) &&
(read_ret =
read(pv_handle, buffer + bytes_read,
SECTOR_SIZE - bytes_read)) != -1)
bytes_read += read_ret;
if (read_ret == -1) {
log_error("%s: read failed: %s", primary->name,
strerror(errno));
return 0;
}
if (s_buffer[255] == 0xAA55) {
if (is_whole_disk(dm, d))
return -1;
} else
return 0;
extended_partition = 0;
/* Loop through primary partitions */
for (p = 0; p < 4; p++) {
if (part[p].sys_ind == DOS_EXTENDED_PARTITION ||
part[p].sys_ind == LINUX_EXTENDED_PARTITION
|| part[p].sys_ind == WIN98_EXTENDED_PARTITION) {
extended_partition = 1;
offset = extended_offset + part[p].start_sect;
if (extended_offset == 0)
extended_offset = part[p].start_sect;
if (first_partition == 1)
part_found++;
} else if (first_partition == 1) {
if (p == part_sought) {
if (part[p].sys_ind == 0) {
/* missing primary? */
return 0;
}
} else
part_found++;
} else if (!part[p].sys_ind)
part_found++;
if (part_sought == part_found)
return part[p].sys_ind;
}
first_partition = 0;
}
while (extended_partition == 1);
return 0;
}
#endif
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