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: stable/10/usr.bin/mkimg/scheme.c 292341 2015-12-16 16:44:56Z emaste $");
29
30 #include <sys/types.h>
31 #include <sys/linker_set.h>
32 #include <sys/queue.h>
33 #include <sys/stat.h>
34 #include <assert.h>
35 #include <err.h>
36 #include <errno.h>
37 #include <limits.h>
38 #include <stdint.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42
43 #include "image.h"
44 #include "mkimg.h"
45 #include "scheme.h"
46
47 static struct {
48 const char *name;
49 enum alias alias;
50 } scheme_alias[] = {
51 { "ebr", ALIAS_EBR },
52 { "efi", ALIAS_EFI },
53 { "fat16b", ALIAS_FAT16B },
54 { "fat32", ALIAS_FAT32 },
55 { "freebsd", ALIAS_FREEBSD },
56 { "freebsd-boot", ALIAS_FREEBSD_BOOT },
57 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
58 { "freebsd-swap", ALIAS_FREEBSD_SWAP },
59 { "freebsd-ufs", ALIAS_FREEBSD_UFS },
60 { "freebsd-vinum", ALIAS_FREEBSD_VINUM },
61 { "freebsd-zfs", ALIAS_FREEBSD_ZFS },
62 { "mbr", ALIAS_MBR },
63 { "ntfs", ALIAS_NTFS },
64 { NULL, ALIAS_NONE } /* Keep last! */
65 };
66
67 static struct mkimg_scheme *scheme;
68 static void *bootcode;
69
70 static enum alias
scheme_parse_alias(const char * name)71 scheme_parse_alias(const char *name)
72 {
73 u_int idx;
74
75 idx = 0;
76 while (scheme_alias[idx].name != NULL) {
77 if (strcasecmp(scheme_alias[idx].name, name) == 0)
78 return (scheme_alias[idx].alias);
79 idx++;
80 }
81 return (ALIAS_NONE);
82 }
83
84 int
scheme_select(const char * spec)85 scheme_select(const char *spec)
86 {
87 struct mkimg_scheme *s, **iter;
88
89 SET_FOREACH(iter, schemes) {
90 s = *iter;
91 if (strcasecmp(spec, s->name) == 0) {
92 scheme = s;
93 return (0);
94 }
95 }
96 return (EINVAL);
97 }
98
99 struct mkimg_scheme *
scheme_selected(void)100 scheme_selected(void)
101 {
102
103 return (scheme);
104 }
105
106 int
scheme_bootcode(int fd)107 scheme_bootcode(int fd)
108 {
109 struct stat sb;
110
111 if (scheme == NULL || scheme->bootcode == 0)
112 return (ENXIO);
113
114 if (fstat(fd, &sb) == -1)
115 return (errno);
116 if (sb.st_size > scheme->bootcode)
117 return (EFBIG);
118
119 bootcode = malloc(scheme->bootcode);
120 if (bootcode == NULL)
121 return (ENOMEM);
122 memset(bootcode, 0, scheme->bootcode);
123 if (read(fd, bootcode, sb.st_size) != sb.st_size) {
124 free(bootcode);
125 bootcode = NULL;
126 return (errno);
127 }
128 return (0);
129 }
130
131 int
scheme_check_part(struct part * p)132 scheme_check_part(struct part *p)
133 {
134 struct mkimg_alias *iter;
135 enum alias alias;
136
137 assert(scheme != NULL);
138
139 /* Check the partition type alias */
140 alias = scheme_parse_alias(p->alias);
141 if (alias == ALIAS_NONE)
142 return (EINVAL);
143
144 iter = scheme->aliases;
145 while (iter->alias != ALIAS_NONE) {
146 if (alias == iter->alias)
147 break;
148 iter++;
149 }
150 if (iter->alias == ALIAS_NONE)
151 return (EINVAL);
152 p->type = iter->type;
153
154 /* Validate the optional label. */
155 if (p->label != NULL) {
156 if (strlen(p->label) > scheme->labellen)
157 return (EINVAL);
158 }
159
160 return (0);
161 }
162
163 u_int
scheme_max_parts(void)164 scheme_max_parts(void)
165 {
166
167 return ((scheme == NULL) ? 0 : scheme->nparts);
168 }
169
170 u_int
scheme_max_secsz(void)171 scheme_max_secsz(void)
172 {
173
174 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
175 }
176
177 lba_t
scheme_metadata(u_int where,lba_t start)178 scheme_metadata(u_int where, lba_t start)
179 {
180
181 return ((scheme == NULL) ? start : scheme->metadata(where, start));
182 }
183
184 int
scheme_write(lba_t end)185 scheme_write(lba_t end)
186 {
187
188 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
189 }
190