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/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
45 static 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
63 static struct mkimg_scheme *scheme;
64 static void *bootcode;
65
66 static enum alias
scheme_parse_alias(const char * name)67 scheme_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
80 int
scheme_select(const char * spec)81 scheme_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
95 struct mkimg_scheme *
scheme_selected(void)96 scheme_selected(void)
97 {
98
99 return (scheme);
100 }
101
102 int
scheme_bootcode(int fd)103 scheme_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
127 int
scheme_check_part(struct part * p)128 scheme_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
157 u_int
scheme_max_parts(void)158 scheme_max_parts(void)
159 {
160
161 return (scheme->nparts);
162 }
163
164 u_int
scheme_max_secsz(void)165 scheme_max_secsz(void)
166 {
167
168 return (scheme->maxsecsz);
169 }
170
171 lba_t
scheme_metadata(u_int where,lba_t start)172 scheme_metadata(u_int where, lba_t start)
173 {
174
175 return (scheme->metadata(where, start));
176 }
177
178 int
scheme_write(lba_t end)179 scheme_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