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