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 { "ntfs", ALIAS_NTFS },
60 { "prepboot", ALIAS_PPCBOOT },
61 { NULL, ALIAS_NONE } /* Keep last! */
62 };
63
64 static struct mkimg_scheme *first;
65 static struct mkimg_scheme *scheme;
66 static void *bootcode;
67
68 static enum alias
scheme_parse_alias(const char * name)69 scheme_parse_alias(const char *name)
70 {
71 u_int idx;
72
73 idx = 0;
74 while (scheme_alias[idx].name != NULL) {
75 if (strcasecmp(scheme_alias[idx].name, name) == 0)
76 return (scheme_alias[idx].alias);
77 idx++;
78 }
79 return (ALIAS_NONE);
80 }
81
82 struct mkimg_scheme *
scheme_iterate(struct mkimg_scheme * s)83 scheme_iterate(struct mkimg_scheme *s)
84 {
85
86 return ((s == NULL) ? first : s->next);
87 }
88
89 void
scheme_register(struct mkimg_scheme * s)90 scheme_register(struct mkimg_scheme *s)
91 {
92 s->next = first;
93 first = s;
94 }
95
96 int
scheme_select(const char * spec)97 scheme_select(const char *spec)
98 {
99 struct mkimg_scheme *s;
100
101 s = NULL;
102 while ((s = scheme_iterate(s)) != NULL) {
103 if (strcasecmp(spec, s->name) == 0) {
104 scheme = s;
105 return (0);
106 }
107 }
108 return (EINVAL);
109 }
110
111 struct mkimg_scheme *
scheme_selected(void)112 scheme_selected(void)
113 {
114
115 return (scheme);
116 }
117
118 int
scheme_bootcode(int fd)119 scheme_bootcode(int fd)
120 {
121 struct stat sb;
122
123 if (scheme == NULL || scheme->bootcode == 0)
124 return (ENXIO);
125
126 if (fstat(fd, &sb) == -1)
127 return (errno);
128 if (sb.st_size > scheme->bootcode)
129 return (EFBIG);
130
131 bootcode = malloc(scheme->bootcode);
132 if (bootcode == NULL)
133 return (ENOMEM);
134 memset(bootcode, 0, scheme->bootcode);
135 if (read(fd, bootcode, sb.st_size) != sb.st_size) {
136 free(bootcode);
137 bootcode = NULL;
138 return (errno);
139 }
140 return (0);
141 }
142
143 int
scheme_check_part(struct part * p)144 scheme_check_part(struct part *p)
145 {
146 struct mkimg_alias *iter;
147 enum alias alias;
148
149 assert(scheme != NULL);
150
151 /* Check the partition type alias */
152 alias = scheme_parse_alias(p->alias);
153 if (alias == ALIAS_NONE)
154 return (EINVAL);
155
156 iter = scheme->aliases;
157 while (iter->alias != ALIAS_NONE) {
158 if (alias == iter->alias)
159 break;
160 iter++;
161 }
162 if (iter->alias == ALIAS_NONE)
163 return (EINVAL);
164 p->type = iter->type;
165
166 /* Validate the optional label. */
167 if (p->label != NULL) {
168 if (strlen(p->label) > scheme->labellen)
169 return (EINVAL);
170 }
171
172 return (0);
173 }
174
175 u_int
scheme_max_parts(void)176 scheme_max_parts(void)
177 {
178
179 return ((scheme == NULL) ? 0 : scheme->nparts);
180 }
181
182 u_int
scheme_max_secsz(void)183 scheme_max_secsz(void)
184 {
185
186 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
187 }
188
189 lba_t
scheme_metadata(u_int where,lba_t start)190 scheme_metadata(u_int where, lba_t start)
191 {
192
193 return ((scheme == NULL) ? start : scheme->metadata(where, start));
194 }
195
196 int
scheme_write(lba_t end)197 scheme_write(lba_t end)
198 {
199
200 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
201 }
202