1 /*-
2 * Copyright (c) 2011 Nathan Whitehorn
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 * $FreeBSD$
27 */
28
29 #include <sys/types.h>
30 #include <sys/sysctl.h>
31 #include <string.h>
32
33 #include "partedit.h"
34
35 static const char *
x86_bootmethod(void)36 x86_bootmethod(void)
37 {
38 static char fw[255] = "";
39 size_t len = sizeof(fw);
40 int error;
41
42 if (strlen(fw) == 0) {
43 error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1);
44 if (error != 0)
45 return ("BIOS");
46 }
47
48 return (fw);
49 }
50
51 const char *
default_scheme(void)52 default_scheme(void)
53 {
54 if (strcmp(x86_bootmethod(), "UEFI") == 0)
55 return ("GPT");
56 else
57 return ("MBR");
58 }
59
60 int
is_scheme_bootable(const char * part_type)61 is_scheme_bootable(const char *part_type)
62 {
63
64 if (strcmp(part_type, "GPT") == 0)
65 return (1);
66 if (strcmp(x86_bootmethod(), "BIOS") == 0) {
67 if (strcmp(part_type, "BSD") == 0)
68 return (1);
69 if (strcmp(part_type, "MBR") == 0)
70 return (1);
71 }
72
73 return (0);
74 }
75
76 int
is_fs_bootable(const char * part_type,const char * fs)77 is_fs_bootable(const char *part_type, const char *fs)
78 {
79
80 if (strcmp(fs, "freebsd-ufs") == 0)
81 return (1);
82
83 if (strcmp(fs, "freebsd-zfs") == 0 &&
84 strcmp(part_type, "GPT") == 0 &&
85 strcmp(x86_bootmethod(), "BIOS") == 0)
86 return (1);
87
88 return (0);
89 }
90
91 size_t
bootpart_size(const char * scheme)92 bootpart_size(const char *scheme)
93 {
94
95 /* No partcode except for GPT */
96 if (strcmp(scheme, "GPT") != 0)
97 return (0);
98
99 if (strcmp(x86_bootmethod(), "BIOS") == 0)
100 return (512*1024);
101 else
102 return (800*1024);
103
104 return (0);
105 }
106
107 const char *
bootpart_type(const char * scheme)108 bootpart_type(const char *scheme)
109 {
110
111 if (strcmp(x86_bootmethod(), "UEFI") == 0)
112 return ("efi");
113
114 return ("freebsd-boot");
115 }
116
117 const char *
bootcode_path(const char * part_type)118 bootcode_path(const char *part_type)
119 {
120
121 if (strcmp(x86_bootmethod(), "UEFI") == 0)
122 return (NULL);
123
124 if (strcmp(part_type, "GPT") == 0)
125 return ("/boot/pmbr");
126 if (strcmp(part_type, "MBR") == 0)
127 return ("/boot/mbr");
128 if (strcmp(part_type, "BSD") == 0)
129 return ("/boot/boot");
130
131 return (NULL);
132 }
133
134 const char *
partcode_path(const char * part_type,const char * fs_type)135 partcode_path(const char *part_type, const char *fs_type)
136 {
137
138 if (strcmp(part_type, "GPT") == 0) {
139 if (strcmp(x86_bootmethod(), "UEFI") == 0)
140 return ("/boot/boot1.efifat");
141 else if (strcmp(fs_type, "zfs") == 0)
142 return ("/boot/gptzfsboot");
143 else
144 return ("/boot/gptboot");
145 }
146
147 /* No partcode except for GPT */
148 return (NULL);
149 }
150
151