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 { "hifive-bbl", ALIAS_HIFIVE_BBL },
62 { "xbootldr", ALIAS_XBOOTLDR },
63 { "hifive-fsbl", ALIAS_HIFIVE_FSBL },
64 { NULL, ALIAS_NONE } /* Keep last! */
65 };
66
67 static struct mkimg_scheme *first;
68 static struct mkimg_scheme *scheme;
69 static void *bootcode;
70
71 static enum alias
scheme_parse_alias(const char * name)72 scheme_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
85 struct mkimg_scheme *
scheme_iterate(struct mkimg_scheme * s)86 scheme_iterate(struct mkimg_scheme *s)
87 {
88
89 return ((s == NULL) ? first : s->next);
90 }
91
92 void
scheme_register(struct mkimg_scheme * s)93 scheme_register(struct mkimg_scheme *s)
94 {
95 s->next = first;
96 first = s;
97 }
98
99 int
scheme_select(const char * spec)100 scheme_select(const char *spec)
101 {
102 struct mkimg_scheme *s;
103
104 s = NULL;
105 while ((s = scheme_iterate(s)) != NULL) {
106 if (strcasecmp(spec, s->name) == 0) {
107 scheme = s;
108 return (0);
109 }
110 }
111 return (EINVAL);
112 }
113
114 struct mkimg_scheme *
scheme_selected(void)115 scheme_selected(void)
116 {
117
118 return (scheme);
119 }
120
121 int
scheme_bootcode(int fd)122 scheme_bootcode(int fd)
123 {
124 struct stat sb;
125
126 if (scheme == NULL || scheme->bootcode == 0)
127 return (ENXIO);
128
129 if (fstat(fd, &sb) == -1)
130 return (errno);
131 if (sb.st_size > scheme->bootcode)
132 return (EFBIG);
133
134 bootcode = malloc(scheme->bootcode);
135 if (bootcode == NULL)
136 return (ENOMEM);
137 memset(bootcode, 0, scheme->bootcode);
138 if (read(fd, bootcode, sb.st_size) != sb.st_size) {
139 free(bootcode);
140 bootcode = NULL;
141 return (errno);
142 }
143 return (0);
144 }
145
146 int
scheme_check_part(struct part * p)147 scheme_check_part(struct part *p)
148 {
149 struct mkimg_alias *iter;
150 enum alias alias;
151
152 assert(scheme != NULL);
153
154 /* Check the partition type alias */
155 alias = scheme_parse_alias(p->alias);
156 if (alias == ALIAS_NONE)
157 return (EINVAL);
158
159 iter = scheme->aliases;
160 while (iter->alias != ALIAS_NONE) {
161 if (alias == iter->alias)
162 break;
163 iter++;
164 }
165 if (iter->alias == ALIAS_NONE)
166 return (EINVAL);
167 p->type = iter->type;
168
169 /* Validate the optional label. */
170 if (p->label != NULL) {
171 if (strlen(p->label) > scheme->labellen)
172 return (EINVAL);
173 }
174
175 return (0);
176 }
177
178 u_int
scheme_max_parts(void)179 scheme_max_parts(void)
180 {
181
182 return ((scheme == NULL) ? 0 : scheme->nparts);
183 }
184
185 u_int
scheme_max_secsz(void)186 scheme_max_secsz(void)
187 {
188
189 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
190 }
191
192 lba_t
scheme_metadata(u_int where,lba_t start)193 scheme_metadata(u_int where, lba_t start)
194 {
195
196 return ((scheme == NULL) ? start : scheme->metadata(where, start));
197 }
198
199 int
scheme_write(lba_t end)200 scheme_write(lba_t end)
201 {
202
203 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
204 }
205