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 * 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 * 52 default_scheme(void) 53 { 54 if (strcmp(x86_bootmethod(), "UEFI") == 0) 55 return ("GPT"); 56 else 57 return ("MBR"); 58 } 59 60 int 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 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 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 * 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 * 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 * 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