scheme.c revision 272030 
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: stable/10/usr.bin/mkimg/scheme.c 272030 2014-09-23 16:05:23Z marcel $");
29
30#include <sys/types.h>
31#include <sys/linker_set.h>
32#include <sys/queue.h>
33#include <sys/stat.h>
34#include <err.h>
35#include <errno.h>
36#include <stdint.h>
37#include <stdlib.h>
38#include <string.h>
39#include <unistd.h>
40
41#include "image.h"
42#include "mkimg.h"
43#include "scheme.h"
44
45static struct {
46	const char *name;
47	enum alias alias;
48} scheme_alias[] = {
49	{ "ebr", ALIAS_EBR },
50	{ "efi", ALIAS_EFI },
51	{ "fat32", ALIAS_FAT32 },
52	{ "freebsd", ALIAS_FREEBSD },
53	{ "freebsd-boot", ALIAS_FREEBSD_BOOT },
54	{ "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
55	{ "freebsd-swap", ALIAS_FREEBSD_SWAP },
56	{ "freebsd-ufs", ALIAS_FREEBSD_UFS },
57	{ "freebsd-vinum", ALIAS_FREEBSD_VINUM },
58	{ "freebsd-zfs", ALIAS_FREEBSD_ZFS },
59	{ "mbr", ALIAS_MBR },
60	{ NULL, ALIAS_NONE }		/* Keep last! */
61};
62
63static struct mkimg_scheme *scheme;
64static void *bootcode;
65
66static enum alias
67scheme_parse_alias(const char *name)
68{
69	u_int idx;
70
71	idx = 0;
72	while (scheme_alias[idx].name != NULL) {
73		if (strcasecmp(scheme_alias[idx].name, name) == 0)
74			return (scheme_alias[idx].alias);
75		idx++;
76	}
77	return (ALIAS_NONE);
78}
79
80int
81scheme_select(const char *spec)
82{
83	struct mkimg_scheme *s, **iter;
84
85	SET_FOREACH(iter, schemes) {
86		s = *iter;
87		if (strcasecmp(spec, s->name) == 0) {
88			scheme = s;
89			return (0);
90		}
91	}
92	return (EINVAL);
93}
94
95struct mkimg_scheme *
96scheme_selected(void)
97{
98
99	return (scheme);
100}
101
102int
103scheme_bootcode(int fd)
104{
105	struct stat sb;
106
107	if (scheme->bootcode == 0)
108		return (ENXIO);
109
110	if (fstat(fd, &sb) == -1)
111		return (errno);
112	if (sb.st_size > scheme->bootcode)
113		return (EFBIG);
114
115	bootcode = malloc(scheme->bootcode);
116	if (bootcode == NULL)
117		return (ENOMEM);
118	memset(bootcode, 0, scheme->bootcode);
119	if (read(fd, bootcode, sb.st_size) != sb.st_size) {
120		free(bootcode);
121		bootcode = NULL;
122		return (errno);
123	}
124	return (0);
125}
126
127int
128scheme_check_part(struct part *p)
129{
130	struct mkimg_alias *iter;
131	enum alias alias;
132
133	/* Check the partition type alias */
134	alias = scheme_parse_alias(p->alias);
135	if (alias == ALIAS_NONE)
136		return (EINVAL);
137
138	iter = scheme->aliases;
139	while (iter->alias != ALIAS_NONE) {
140		if (alias == iter->alias)
141			break;
142		iter++;
143	}
144	if (iter->alias == ALIAS_NONE)
145		return (EINVAL);
146	p->type = iter->type;
147
148	/* Validate the optional label. */
149	if (p->label != NULL) {
150		if (strlen(p->label) > scheme->labellen)
151			return (EINVAL);
152	}
153
154	return (0);
155}
156
157u_int
158scheme_max_parts(void)
159{
160
161	return (scheme->nparts);
162}
163
164u_int
165scheme_max_secsz(void)
166{
167
168	return (scheme->maxsecsz);
169}
170
171lba_t
172scheme_metadata(u_int where, lba_t start)
173{
174
175	return (scheme->metadata(where, start));
176}
177
178int
179scheme_write(lba_t end)
180{
181	int error;
182
183	end = image_get_size();
184	error = scheme->write(end, bootcode);
185	return (error);
186}
187