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mirror of git://sourceware.org/git/lvm2.git synced 2024-12-30 17:18:21 +03:00
lvm2/lib/device/dev-luks.c
David Teigland 6cb0b44cd2 filter: remove unused EAGAIN case and flag
The case of filters returning EAGAIN and using the
FILTER_AFTER_SCAN flag is no longer used.
2022-04-06 12:51:34 -05:00

37 lines
989 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "lib/misc/lib.h"
#include "lib/device/dev-type.h"
#define LUKS_SIGNATURE "LUKS\xba\xbe"
#define LUKS_SIGNATURE_SIZE 6
int dev_is_luks(struct cmd_context *cmd, struct device *dev, uint64_t *offset_found, int full)
{
char buf[LUKS_SIGNATURE_SIZE];
int ret = -1;
if (offset_found)
*offset_found = 0;
if (!dev_read_bytes(dev, 0, LUKS_SIGNATURE_SIZE, buf))
goto_out;
ret = memcmp(buf, LUKS_SIGNATURE, LUKS_SIGNATURE_SIZE) ? 0 : 1;
out:
return ret;
}