1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013,2014 Juniper Networks, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include <sys/stat.h>
31 #include <assert.h>
32 #include <errno.h>
33 #include <limits.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
37
38 #include "image.h"
39 #include "mkimg.h"
40 #include "scheme.h"
41
42 static struct {
43 const char *name;
44 enum alias alias;
45 } scheme_alias[] = {
46 { "ebr", ALIAS_EBR },
47 { "efi", ALIAS_EFI },
48 { "fat16b", ALIAS_FAT16B },
49 { "fat32", ALIAS_FAT32 },
50 { "fat32lba", ALIAS_FAT32LBA },
51 { "freebsd", ALIAS_FREEBSD },
52 { "freebsd-boot", ALIAS_FREEBSD_BOOT },
53 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
54 { "freebsd-swap", ALIAS_FREEBSD_SWAP },
55 { "freebsd-ufs", ALIAS_FREEBSD_UFS },
56 { "freebsd-vinum", ALIAS_FREEBSD_VINUM },
57 { "freebsd-zfs", ALIAS_FREEBSD_ZFS },
58 { "mbr", ALIAS_MBR },
59 { "ms-basic-data", ALIAS_MS_BASIC_DATA },
60 { "ntfs", ALIAS_NTFS },
61 { "prepboot", ALIAS_PPCBOOT },
62 { "hifive-bbl", ALIAS_HIFIVE_BBL },
63 { "xbootldr", ALIAS_XBOOTLDR },
64 { "hifive-fsbl", ALIAS_HIFIVE_FSBL },
65 { NULL, ALIAS_NONE } /* Keep last! */
66 };
67
68 static struct mkimg_scheme *first;
69 static struct mkimg_scheme *scheme;
70 static void *bootcode;
71
72 static enum alias
scheme_parse_alias(const char * name)73 scheme_parse_alias(const char *name)
74 {
75 u_int idx;
76
77 idx = 0;
78 while (scheme_alias[idx].name != NULL) {
79 if (strcasecmp(scheme_alias[idx].name, name) == 0)
80 return (scheme_alias[idx].alias);
81 idx++;
82 }
83 return (ALIAS_NONE);
84 }
85
86 struct mkimg_scheme *
scheme_iterate(struct mkimg_scheme * s)87 scheme_iterate(struct mkimg_scheme *s)
88 {
89
90 return ((s == NULL) ? first : s->next);
91 }
92
93 void
scheme_register(struct mkimg_scheme * s)94 scheme_register(struct mkimg_scheme *s)
95 {
96 s->next = first;
97 first = s;
98 }
99
100 int
scheme_select(const char * spec)101 scheme_select(const char *spec)
102 {
103 struct mkimg_scheme *s;
104
105 s = NULL;
106 while ((s = scheme_iterate(s)) != NULL) {
107 if (strcasecmp(spec, s->name) == 0) {
108 scheme = s;
109 return (0);
110 }
111 }
112 return (EINVAL);
113 }
114
115 struct mkimg_scheme *
scheme_selected(void)116 scheme_selected(void)
117 {
118
119 return (scheme);
120 }
121
122 int
scheme_bootcode(int fd)123 scheme_bootcode(int fd)
124 {
125 struct stat sb;
126
127 if (scheme == NULL || scheme->bootcode == 0)
128 return (ENXIO);
129
130 if (fstat(fd, &sb) == -1)
131 return (errno);
132 if (sb.st_size > scheme->bootcode)
133 return (EFBIG);
134
135 bootcode = malloc(scheme->bootcode);
136 if (bootcode == NULL)
137 return (ENOMEM);
138 memset(bootcode, 0, scheme->bootcode);
139 if (read(fd, bootcode, sb.st_size) != sb.st_size) {
140 free(bootcode);
141 bootcode = NULL;
142 return (errno);
143 }
144 return (0);
145 }
146
147 int
scheme_check_part(struct part * p)148 scheme_check_part(struct part *p)
149 {
150 struct mkimg_alias *iter;
151 enum alias alias;
152
153 assert(scheme != NULL);
154
155 /* Check the partition type alias */
156 alias = scheme_parse_alias(p->alias);
157 if (alias == ALIAS_NONE)
158 return (EINVAL);
159
160 iter = scheme->aliases;
161 while (iter->alias != ALIAS_NONE) {
162 if (alias == iter->alias)
163 break;
164 iter++;
165 }
166 if (iter->alias == ALIAS_NONE)
167 return (EINVAL);
168 p->type = iter->type;
169
170 /* Validate the optional label. */
171 if (p->label != NULL) {
172 if (strlen(p->label) > scheme->labellen)
173 return (EINVAL);
174 }
175
176 return (0);
177 }
178
179 u_int
scheme_max_parts(void)180 scheme_max_parts(void)
181 {
182
183 return ((scheme == NULL) ? 0 : scheme->nparts);
184 }
185
186 u_int
scheme_max_secsz(void)187 scheme_max_secsz(void)
188 {
189
190 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
191 }
192
193 lba_t
scheme_metadata(u_int where,lba_t start)194 scheme_metadata(u_int where, lba_t start)
195 {
196
197 return ((scheme == NULL) ? start : scheme->metadata(where, start));
198 }
199
200 int
scheme_write(lba_t end)201 scheme_write(lba_t end)
202 {
203
204 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
205 }
206