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("$FreeBSD$");
29
30 #include <sys/stat.h>
31 #include <assert.h>
32 #include <err.h>
33 #include <errno.h>
34 #include <limits.h>
35 #include <stdint.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 #include "image.h"
41 #include "mkimg.h"
42 #include "scheme.h"
43
44 static struct {
45 const char *name;
46 enum alias alias;
47 } scheme_alias[] = {
48 { "ebr", ALIAS_EBR },
49 { "efi", ALIAS_EFI },
50 { "fat16b", ALIAS_FAT16B },
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 { "ntfs", ALIAS_NTFS },
61 { "prepboot", ALIAS_PPCBOOT },
62 { NULL, ALIAS_NONE } /* Keep last! */
63 };
64
65 static struct mkimg_scheme *first;
66 static struct mkimg_scheme *scheme;
67 static void *bootcode;
68
69 static enum alias
scheme_parse_alias(const char * name)70 scheme_parse_alias(const char *name)
71 {
72 u_int idx;
73
74 idx = 0;
75 while (scheme_alias[idx].name != NULL) {
76 if (strcasecmp(scheme_alias[idx].name, name) == 0)
77 return (scheme_alias[idx].alias);
78 idx++;
79 }
80 return (ALIAS_NONE);
81 }
82
83 struct mkimg_scheme *
scheme_iterate(struct mkimg_scheme * s)84 scheme_iterate(struct mkimg_scheme *s)
85 {
86
87 return ((s == NULL) ? first : s->next);
88 }
89
90 void
scheme_register(struct mkimg_scheme * s)91 scheme_register(struct mkimg_scheme *s)
92 {
93 s->next = first;
94 first = s;
95 }
96
97 int
scheme_select(const char * spec)98 scheme_select(const char *spec)
99 {
100 struct mkimg_scheme *s;
101
102 s = NULL;
103 while ((s = scheme_iterate(s)) != NULL) {
104 if (strcasecmp(spec, s->name) == 0) {
105 scheme = s;
106 return (0);
107 }
108 }
109 return (EINVAL);
110 }
111
112 struct mkimg_scheme *
scheme_selected(void)113 scheme_selected(void)
114 {
115
116 return (scheme);
117 }
118
119 int
scheme_bootcode(int fd)120 scheme_bootcode(int fd)
121 {
122 struct stat sb;
123
124 if (scheme == NULL || scheme->bootcode == 0)
125 return (ENXIO);
126
127 if (fstat(fd, &sb) == -1)
128 return (errno);
129 if (sb.st_size > scheme->bootcode)
130 return (EFBIG);
131
132 bootcode = malloc(scheme->bootcode);
133 if (bootcode == NULL)
134 return (ENOMEM);
135 memset(bootcode, 0, scheme->bootcode);
136 if (read(fd, bootcode, sb.st_size) != sb.st_size) {
137 free(bootcode);
138 bootcode = NULL;
139 return (errno);
140 }
141 return (0);
142 }
143
144 int
scheme_check_part(struct part * p)145 scheme_check_part(struct part *p)
146 {
147 struct mkimg_alias *iter;
148 enum alias alias;
149
150 assert(scheme != NULL);
151
152 /* Check the partition type alias */
153 alias = scheme_parse_alias(p->alias);
154 if (alias == ALIAS_NONE)
155 return (EINVAL);
156
157 iter = scheme->aliases;
158 while (iter->alias != ALIAS_NONE) {
159 if (alias == iter->alias)
160 break;
161 iter++;
162 }
163 if (iter->alias == ALIAS_NONE)
164 return (EINVAL);
165 p->type = iter->type;
166
167 /* Validate the optional label. */
168 if (p->label != NULL) {
169 if (strlen(p->label) > scheme->labellen)
170 return (EINVAL);
171 }
172
173 return (0);
174 }
175
176 u_int
scheme_max_parts(void)177 scheme_max_parts(void)
178 {
179
180 return ((scheme == NULL) ? 0 : scheme->nparts);
181 }
182
183 u_int
scheme_max_secsz(void)184 scheme_max_secsz(void)
185 {
186
187 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
188 }
189
190 lba_t
scheme_metadata(u_int where,lba_t start)191 scheme_metadata(u_int where, lba_t start)
192 {
193
194 return ((scheme == NULL) ? start : scheme->metadata(where, start));
195 }
196
197 int
scheme_write(lba_t end)198 scheme_write(lba_t end)
199 {
200
201 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
202 }
203