mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-28 20:25:52 +03:00
03c941a4ca
The wipe_known_signatures fn now wraps the _wipe_signature fn that is called for each known signature (currently md, swap and luks). This patch makes the code more readable, not repeating the same sequence when used anywhere in the code. We're going to reuse this code later...
45 lines
1015 B
C
45 lines
1015 B
C
/*
|
|
* Copyright (C) 2010 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This file is part of LVM2.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU Lesser General Public License v.2.1.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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
|
|
*/
|
|
|
|
#include "lib.h"
|
|
#include "dev-type.h"
|
|
|
|
#define LUKS_SIGNATURE "LUKS\xba\xbe"
|
|
#define LUKS_SIGNATURE_SIZE 6
|
|
|
|
int dev_is_luks(struct device *dev, uint64_t *offset_found)
|
|
{
|
|
char buf[LUKS_SIGNATURE_SIZE];
|
|
int ret = -1;
|
|
|
|
if (!dev_open_readonly(dev)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
if (offset_found)
|
|
*offset_found = 0;
|
|
|
|
if (!dev_read(dev, 0, LUKS_SIGNATURE_SIZE, buf))
|
|
goto_out;
|
|
|
|
ret = memcmp(buf, LUKS_SIGNATURE, LUKS_SIGNATURE_SIZE) ? 0 : 1;
|
|
|
|
out:
|
|
if (!dev_close(dev))
|
|
stack;
|
|
|
|
return ret;
|
|
}
|