1/*-
2 * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28#include <sys/disk.h>
29#include <sys/types.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33
34#include <geom/eli/g_eli.h>
35
36#include "fstyp.h"
37
38int
39fstyp_geli(FILE *fp, char *label __unused, size_t labelsize __unused)
40{
41	int error;
42	off_t mediasize;
43	u_int sectorsize;
44	struct g_eli_metadata md;
45	u_char *buf;
46
47	error = ioctl(fileno(fp), DIOCGMEDIASIZE, &mediasize);
48	if (error != 0)
49		return (1);
50	error = ioctl(fileno(fp), DIOCGSECTORSIZE, &sectorsize);
51	if (error != 0)
52		return (1);
53	buf = (u_char *)read_buf(fp, mediasize - sectorsize, sectorsize);
54	if (buf == NULL)
55		goto gelierr;
56	error = eli_metadata_decode(buf, &md);
57	if (error)
58		goto gelierr;
59
60	if (strcmp(md.md_magic, G_ELI_MAGIC) == 0) {
61		free(buf);
62		return (0);
63	}
64
65gelierr:
66	free(buf);
67
68	return (1);
69}
70