1/*-
2 * Copyright (c) 2013,2014 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: releng/11.0/usr.bin/mkimg/scheme.c 292082 2015-12-11 05:39:42Z imp $");
29
30#include <sys/types.h>
31#include <sys/linker_set.h>
32#include <sys/queue.h>
33#include <sys/stat.h>
34#include <assert.h>
35#include <err.h>
36#include <errno.h>
37#include <limits.h>
38#include <stdint.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43#include "image.h"
44#include "mkimg.h"
45#include "scheme.h"
46
47static struct {
48	const char *name;
49	enum alias alias;
50} scheme_alias[] = {
51	{ "ebr", ALIAS_EBR },
52	{ "efi", ALIAS_EFI },
53	{ "fat16b", ALIAS_FAT16B },
54	{ "fat32", ALIAS_FAT32 },
55	{ "freebsd", ALIAS_FREEBSD },
56	{ "freebsd-boot", ALIAS_FREEBSD_BOOT },
57	{ "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
58	{ "freebsd-swap", ALIAS_FREEBSD_SWAP },
59	{ "freebsd-ufs", ALIAS_FREEBSD_UFS },
60	{ "freebsd-vinum", ALIAS_FREEBSD_VINUM },
61	{ "freebsd-zfs", ALIAS_FREEBSD_ZFS },
62	{ "mbr", ALIAS_MBR },
63	{ "ntfs", ALIAS_NTFS },
64	{ "prepboot", ALIAS_PPCBOOT },
65	{ NULL, ALIAS_NONE }		/* Keep last! */
66};
67
68static struct mkimg_scheme *scheme;
69static void *bootcode;
70
71static enum alias
72scheme_parse_alias(const char *name)
73{
74	u_int idx;
75
76	idx = 0;
77	while (scheme_alias[idx].name != NULL) {
78		if (strcasecmp(scheme_alias[idx].name, name) == 0)
79			return (scheme_alias[idx].alias);
80		idx++;
81	}
82	return (ALIAS_NONE);
83}
84
85int
86scheme_select(const char *spec)
87{
88	struct mkimg_scheme *s, **iter;
89
90	SET_FOREACH(iter, schemes) {
91		s = *iter;
92		if (strcasecmp(spec, s->name) == 0) {
93			scheme = s;
94			return (0);
95		}
96	}
97	return (EINVAL);
98}
99
100struct mkimg_scheme *
101scheme_selected(void)
102{
103
104	return (scheme);
105}
106
107int
108scheme_bootcode(int fd)
109{
110	struct stat sb;
111
112	if (scheme == NULL || scheme->bootcode == 0)
113		return (ENXIO);
114
115	if (fstat(fd, &sb) == -1)
116		return (errno);
117	if (sb.st_size > scheme->bootcode)
118		return (EFBIG);
119
120	bootcode = malloc(scheme->bootcode);
121	if (bootcode == NULL)
122		return (ENOMEM);
123	memset(bootcode, 0, scheme->bootcode);
124	if (read(fd, bootcode, sb.st_size) != sb.st_size) {
125		free(bootcode);
126		bootcode = NULL;
127		return (errno);
128	}
129	return (0);
130}
131
132int
133scheme_check_part(struct part *p)
134{
135	struct mkimg_alias *iter;
136	enum alias alias;
137
138	assert(scheme != NULL);
139
140	/* Check the partition type alias */
141	alias = scheme_parse_alias(p->alias);
142	if (alias == ALIAS_NONE)
143		return (EINVAL);
144
145	iter = scheme->aliases;
146	while (iter->alias != ALIAS_NONE) {
147		if (alias == iter->alias)
148			break;
149		iter++;
150	}
151	if (iter->alias == ALIAS_NONE)
152		return (EINVAL);
153	p->type = iter->type;
154
155	/* Validate the optional label. */
156	if (p->label != NULL) {
157		if (strlen(p->label) > scheme->labellen)
158			return (EINVAL);
159	}
160
161	return (0);
162}
163
164u_int
165scheme_max_parts(void)
166{
167
168	return ((scheme == NULL) ? 0 : scheme->nparts);
169}
170
171u_int
172scheme_max_secsz(void)
173{
174
175	return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
176}
177
178lba_t
179scheme_metadata(u_int where, lba_t start)
180{
181
182	return ((scheme == NULL) ? start : scheme->metadata(where, start));
183}
184
185int
186scheme_write(lba_t end)
187{
188
189	return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
190}
191