ebr.c revision 263409 
1/*-
2 * Copyright (c) 2014 Juniper Networks, Inc.
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 AUTHOR 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 AUTHOR 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__FBSDID("$FreeBSD: user/marcel/mkimg/ebr.c 263409 2014-03-20 00:38:17Z marcel $");
29
30#include <sys/types.h>
31#include <sys/linker_set.h>
32#include <sys/queue.h>
33#include <stdlib.h>
34#include <uuid.h>
35
36#include "mkimg.h"
37#include "scheme.h"
38
39static struct mkimg_alias ebr_aliases[] = {
40    {	NULL, 0 }
41};
42
43static off_t
44ebr_get_leader(u_int parts __unused)
45{
46
47	return (1);
48}
49
50static off_t
51ebr_get_trailer(u_int parts __unused)
52{
53
54	/*
55	 * Compensate for having reserved a sector for the EBR after
56	 * the last partition.
57	 */
58	return (-1);
59}
60
61static struct mkimg_scheme ebr_scheme = {
62	.name = "ebr",
63	.description = "Extended Boot Record",
64	.nparts = 4096,
65	.padding = 1,	/* See ebr_get_trailer() above */
66	.aliases = ebr_aliases,
67	.get_leader = ebr_get_leader,
68	.get_trailer = ebr_get_trailer
69};
70
71SCHEME_DEFINE(ebr_scheme);
72