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 /* EFI partition size in bytes */ 36 #define EFI_BOOTPART_SIZE (200 * 1024 * 1024) 37 #define EFI_BOOTPART_PATH "/boot/boot1.efifat" 38 39 static const char * 40 x86_bootmethod(void) 41 { 42 static char fw[255] = ""; 43 size_t len = sizeof(fw); 44 int error; 45 46 if (strlen(fw) == 0) { 47 error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1); 48 if (error != 0) 49 return ("BIOS"); 50 } 51 52 return (fw); 53 } 54 55 const char * 56 default_scheme(void) 57 { 58 if (strcmp(x86_bootmethod(), "UEFI") == 0) 59 return ("GPT"); 60 else 61 return ("MBR"); 62 } 63 64 int 65 is_scheme_bootable(const char *part_type) 66 { 67 68 if (strcmp(part_type, "GPT") == 0) 69 return (1); 70 if (strcmp(x86_bootmethod(), "BIOS") == 0) { 71 if (strcmp(part_type, "BSD") == 0) 72 return (1); 73 if (strcmp(part_type, "MBR") == 0) 74 return (1); 75 } 76 77 return (0); 78 } 79 80 int 81 is_fs_bootable(const char *part_type, const char *fs) 82 { 83 84 if (strcmp(fs, "freebsd-ufs") == 0) 85 return (1); 86 87 if (strcmp(fs, "freebsd-zfs") == 0 && 88 strcmp(part_type, "GPT") == 0 && 89 strcmp(x86_bootmethod(), "BIOS") == 0) 90 return (1); 91 92 return (0); 93 } 94 95 size_t 96 bootpart_size(const char *scheme) 97 { 98 99 /* No partcode except for GPT */ 100 if (strcmp(scheme, "GPT") != 0) 101 return (0); 102 103 if (strcmp(x86_bootmethod(), "BIOS") == 0) 104 return (512*1024); 105 else 106 return (EFI_BOOTPART_SIZE); 107 108 return (0); 109 } 110 111 const char * 112 bootpart_type(const char *scheme) 113 { 114 115 if (strcmp(x86_bootmethod(), "UEFI") == 0) 116 return ("efi"); 117 118 return ("freebsd-boot"); 119 } 120 121 const char * 122 bootcode_path(const char *part_type) 123 { 124 125 if (strcmp(x86_bootmethod(), "UEFI") == 0) 126 return (NULL); 127 128 if (strcmp(part_type, "GPT") == 0) 129 return ("/boot/pmbr"); 130 if (strcmp(part_type, "MBR") == 0) 131 return ("/boot/mbr"); 132 if (strcmp(part_type, "BSD") == 0) 133 return ("/boot/boot"); 134 135 return (NULL); 136 } 137 138 const char * 139 partcode_path(const char *part_type, const char *fs_type) 140 { 141 142 if (strcmp(part_type, "GPT") == 0) { 143 if (strcmp(x86_bootmethod(), "UEFI") == 0) 144 return (EFI_BOOTPART_PATH); 145 else if (strcmp(fs_type, "zfs") == 0) 146 return ("/boot/gptzfsboot"); 147 else 148 return ("/boot/gptboot"); 149 } 150 151 /* No partcode except for GPT */ 152 return (NULL); 153 } 154 155