1/*-
2 * Copyright (c) 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>
| 1/*-
2 * Copyright (c) 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>
|
41static struct mkimg_alias mbr_aliases[] = {
42 { ALIAS_EBR, ALIAS_INT2TYPE(DOSPTYP_EXT) },
43 { ALIAS_FAT32, ALIAS_INT2TYPE(DOSPTYP_FAT32) },
44 { ALIAS_FREEBSD, ALIAS_INT2TYPE(DOSPTYP_386BSD) },
45 { ALIAS_NONE, 0 } /* Keep last! */
46};
47
48static u_int
49mbr_metadata(u_int where)
50{
51 u_int secs;
52
53 secs = (where == SCHEME_META_IMG_START) ? nsecs : 0;
54 return (secs);
55}
56
57static void
58mbr_chs(u_char *cyl, u_char *hd, u_char *sec, uint32_t lba __unused)
59{
60
61 *cyl = 0xff; /* XXX */
62 *hd = 0xff; /* XXX */
63 *sec = 0xff; /* XXX */
64}
65
66static int
67mbr_write(int fd, lba_t imgsz __unused, void *bootcode)
68{
69 u_char *mbr;
70 struct dos_partition *dpbase, *dp;
71 struct part *part;
72 int error;
73
74 mbr = malloc(secsz);
75 if (mbr == NULL)
76 return (ENOMEM);
77 if (bootcode != NULL) {
78 memcpy(mbr, bootcode, DOSPARTOFF);
79 memset(mbr + DOSPARTOFF, 0, secsz - DOSPARTOFF);
80 } else
81 memset(mbr, 0, secsz);
82 le16enc(mbr + DOSMAGICOFFSET, DOSMAGIC);
83 dpbase = (void *)(mbr + DOSPARTOFF);
84 STAILQ_FOREACH(part, &partlist, link) {
85 dp = dpbase + part->index;
86 dp->dp_flag = (part->index == 0 && bootcode != NULL) ? 0x80 : 0;
87 mbr_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
88 part->block);
89 dp->dp_typ = ALIAS_TYPE2INT(part->type);
90 mbr_chs(&dp->dp_ecyl, &dp->dp_ehd, &dp->dp_esect,
91 part->block + part->size - 1);
92 le32enc(&dp->dp_start, part->block);
93 le32enc(&dp->dp_size, part->size);
94 }
95 error = mkimg_seek(fd, 0);
96 if (error == 0) {
97 if (write(fd, mbr, secsz) != (ssize_t)secsz)
98 error = errno;
99 }
100 free(mbr);
101 return (error);
102}
103
104static struct mkimg_scheme mbr_scheme = {
105 .name = "mbr",
106 .description = "Master Boot Record",
107 .aliases = mbr_aliases,
108 .metadata = mbr_metadata,
109 .write = mbr_write,
110 .bootcode = 512,
111 .nparts = NDOSPART,
112 .maxsecsz = 4096
113};
114
115SCHEME_DEFINE(mbr_scheme);
| 45static struct mkimg_alias mbr_aliases[] = {
46 { ALIAS_EBR, ALIAS_INT2TYPE(DOSPTYP_EXT) },
47 { ALIAS_FAT32, ALIAS_INT2TYPE(DOSPTYP_FAT32) },
48 { ALIAS_FREEBSD, ALIAS_INT2TYPE(DOSPTYP_386BSD) },
49 { ALIAS_NONE, 0 } /* Keep last! */
50};
51
52static u_int
53mbr_metadata(u_int where)
54{
55 u_int secs;
56
57 secs = (where == SCHEME_META_IMG_START) ? nsecs : 0;
58 return (secs);
59}
60
61static void
62mbr_chs(u_char *cyl, u_char *hd, u_char *sec, uint32_t lba __unused)
63{
64
65 *cyl = 0xff; /* XXX */
66 *hd = 0xff; /* XXX */
67 *sec = 0xff; /* XXX */
68}
69
70static int
71mbr_write(int fd, lba_t imgsz __unused, void *bootcode)
72{
73 u_char *mbr;
74 struct dos_partition *dpbase, *dp;
75 struct part *part;
76 int error;
77
78 mbr = malloc(secsz);
79 if (mbr == NULL)
80 return (ENOMEM);
81 if (bootcode != NULL) {
82 memcpy(mbr, bootcode, DOSPARTOFF);
83 memset(mbr + DOSPARTOFF, 0, secsz - DOSPARTOFF);
84 } else
85 memset(mbr, 0, secsz);
86 le16enc(mbr + DOSMAGICOFFSET, DOSMAGIC);
87 dpbase = (void *)(mbr + DOSPARTOFF);
88 STAILQ_FOREACH(part, &partlist, link) {
89 dp = dpbase + part->index;
90 dp->dp_flag = (part->index == 0 && bootcode != NULL) ? 0x80 : 0;
91 mbr_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
92 part->block);
93 dp->dp_typ = ALIAS_TYPE2INT(part->type);
94 mbr_chs(&dp->dp_ecyl, &dp->dp_ehd, &dp->dp_esect,
95 part->block + part->size - 1);
96 le32enc(&dp->dp_start, part->block);
97 le32enc(&dp->dp_size, part->size);
98 }
99 error = mkimg_seek(fd, 0);
100 if (error == 0) {
101 if (write(fd, mbr, secsz) != (ssize_t)secsz)
102 error = errno;
103 }
104 free(mbr);
105 return (error);
106}
107
108static struct mkimg_scheme mbr_scheme = {
109 .name = "mbr",
110 .description = "Master Boot Record",
111 .aliases = mbr_aliases,
112 .metadata = mbr_metadata,
113 .write = mbr_write,
114 .bootcode = 512,
115 .nparts = NDOSPART,
116 .maxsecsz = 4096
117};
118
119SCHEME_DEFINE(mbr_scheme);
|