470 lines
17 KiB
C
470 lines
17 KiB
C
/*
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* gptsync/lib.c
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* Platform-independent code common to gptsync and showpart
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*
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* Copyright (c) 2006-2007 Christoph Pfisterer
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* * Neither the name of Christoph Pfisterer nor the names of the
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "gptsync.h"
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// variables
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UINT8 empty_guid[16] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
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PARTITION_INFO mbr_parts[4];
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UINTN mbr_part_count = 0;
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PARTITION_INFO gpt_parts[128];
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UINTN gpt_part_count = 0;
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PARTITION_INFO new_mbr_parts[4];
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UINTN new_mbr_part_count = 0;
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UINT8 sector[512];
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MBR_PARTTYPE mbr_types[] = {
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{ 0x01, STR("FAT12 (CHS)") },
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{ 0x04, STR("FAT16 <32M (CHS)") },
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{ 0x05, STR("Extended (CHS)") },
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{ 0x06, STR("FAT16 (CHS)") },
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{ 0x07, STR("NTFS/HPFS") },
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{ 0x0b, STR("FAT32 (CHS)") },
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{ 0x0c, STR("FAT32 (LBA)") },
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{ 0x0e, STR("FAT16 (LBA)") },
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{ 0x0f, STR("Extended (LBA)") },
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{ 0x11, STR("Hidden FAT12 (CHS)") },
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{ 0x14, STR("Hidden FAT16 <32M (CHS)") },
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{ 0x16, STR("Hidden FAT16 (CHS)") },
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{ 0x17, STR("Hidden NTFS/HPFS") },
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{ 0x1b, STR("Hidden FAT32 (CHS)") },
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{ 0x1c, STR("Hidden FAT32 (LBA)") },
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{ 0x1e, STR("Hidden FAT16 (LBA)") },
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{ 0x82, STR("Linux swap / Solaris") },
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{ 0x83, STR("Linux") },
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{ 0x85, STR("Linux Extended") },
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{ 0x86, STR("NT FAT volume set") },
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{ 0x87, STR("NTFS volume set") },
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{ 0x8e, STR("Linux LVM") },
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{ 0xa5, STR("FreeBSD") },
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{ 0xa6, STR("OpenBSD") },
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{ 0xa7, STR("NeXTSTEP") },
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{ 0xa8, STR("Mac OS X UFS") },
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{ 0xa9, STR("NetBSD") },
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{ 0xab, STR("Mac OS X Boot") },
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{ 0xac, STR("Apple RAID") },
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{ 0xaf, STR("Mac OS X HFS+") },
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{ 0xbe, STR("Solaris Boot") },
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{ 0xbf, STR("Solaris") },
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{ 0xeb, STR("BeOS") },
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{ 0xee, STR("EFI Protective") },
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{ 0xef, STR("EFI System (FAT)") },
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{ 0xfd, STR("Linux RAID") },
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{ 0, NULL },
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};
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GPT_PARTTYPE gpt_types[] = {
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{ "\x28\x73\x2A\xC1\x1F\xF8\xD2\x11\xBA\x4B\x00\xA0\xC9\x3E\xC9\x3B", 0xef, STR("EFI System (FAT)"), GPT_KIND_SYSTEM },
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{ "\x41\xEE\x4D\x02\xE7\x33\xD3\x11\x9D\x69\x00\x08\xC7\x81\xF3\x9F", 0x00, STR("MBR partition scheme"), GPT_KIND_FATAL },
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{ "\x16\xE3\xC9\xE3\x5C\x0B\xB8\x4D\x81\x7D\xF9\x2D\xF0\x02\x15\xAE", 0x00, STR("MS Reserved"), GPT_KIND_SYSTEM },
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{ "\xA2\xA0\xD0\xEB\xE5\xB9\x33\x44\x87\xC0\x68\xB6\xB7\x26\x99\xC7", 0x00, STR("Basic Data"), GPT_KIND_BASIC_DATA },
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{ "\xAA\xC8\x08\x58\x8F\x7E\xE0\x42\x85\xD2\xE1\xE9\x04\x34\xCF\xB3", 0x00, STR("MS LDM Metadata"), GPT_KIND_FATAL },
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{ "\xA0\x60\x9B\xAF\x31\x14\x62\x4F\xBC\x68\x33\x11\x71\x4A\x69\xAD", 0x00, STR("MS LDM Data"), GPT_KIND_FATAL },
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{ "\x1E\x4C\x89\x75\xEB\x3A\xD3\x11\xB7\xC1\x7B\x03\xA0\x00\x00\x00", 0x00, STR("HP/UX Data"), GPT_KIND_DATA },
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{ "\x28\xE7\xA1\xE2\xE3\x32\xD6\x11\xA6\x82\x7B\x03\xA0\x00\x00\x00", 0x00, STR("HP/UX Service"), GPT_KIND_SYSTEM },
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{ "\x0F\x88\x9D\xA1\xFC\x05\x3B\x4D\xA0\x06\x74\x3F\x0F\x84\x91\x1E", 0xfd, STR("Linux RAID"), GPT_KIND_DATA },
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{ "\x6D\xFD\x57\x06\xAB\xA4\xC4\x43\x84\xE5\x09\x33\xC8\x4B\x4F\x4F", 0x82, STR("Linux Swap"), GPT_KIND_SYSTEM },
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{ "\x79\xD3\xD6\xE6\x07\xF5\xC2\x44\xA2\x3C\x23\x8F\x2A\x3D\xF9\x28", 0x8e, STR("Linux LVM"), GPT_KIND_DATA },
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{ "\x39\x33\xA6\x8D\x07\x00\xC0\x60\xC4\x36\x08\x3A\xC8\x23\x09\x08", 0x00, STR("Linux Reserved"), GPT_KIND_SYSTEM },
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{ "\xB4\x7C\x6E\x51\xCF\x6E\xD6\x11\x8F\xF8\x00\x02\x2D\x09\x71\x2B", 0xa5, STR("FreeBSD Data"), GPT_KIND_DATA },
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{ "\xB5\x7C\x6E\x51\xCF\x6E\xD6\x11\x8F\xF8\x00\x02\x2D\x09\x71\x2B", 0x00, STR("FreeBSD Swap"), GPT_KIND_SYSTEM },
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{ "\xB6\x7C\x6E\x51\xCF\x6E\xD6\x11\x8F\xF8\x00\x02\x2D\x09\x71\x2B", 0xa5, STR("FreeBSD UFS"), GPT_KIND_DATA },
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{ "\xB8\x7C\x6E\x51\xCF\x6E\xD6\x11\x8F\xF8\x00\x02\x2D\x09\x71\x2B", 0x00, STR("FreeBSD Vinum"), GPT_KIND_DATA },
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{ "\x00\x53\x46\x48\x00\x00\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0xaf, STR("Mac OS X HFS+"), GPT_KIND_DATA },
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{ "\x00\x53\x46\x55\x00\x00\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0xa8, STR("Mac OS X UFS"), GPT_KIND_DATA },
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{ "\x74\x6F\x6F\x42\x00\x00\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0xab, STR("Mac OS X Boot"), GPT_KIND_DATA },
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{ "\x44\x49\x41\x52\x00\x00\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0xac, STR("Apple RAID"), GPT_KIND_DATA },
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{ "\x44\x49\x41\x52\x4F\x5F\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0xac, STR("Apple RAID (Offline)"), GPT_KIND_DATA },
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{ "\x65\x62\x61\x4C\x00\x6C\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0x00, STR("Apple Label"), GPT_KIND_SYSTEM },
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{ "\x6F\x63\x65\x52\x65\x76\xAA\x11\xAA\x11\x00\x30\x65\x43\xEC\xAC", 0x00, STR("Apple Recovery"), GPT_KIND_BASIC_DATA },
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{ "\x7f\x23\x96\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0x00, STR("Solaris Reserved"), GPT_KIND_SYSTEM },
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{ "\x45\xCB\x82\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Boot"), GPT_KIND_DATA },
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{ "\x4D\xCF\x85\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Root"), GPT_KIND_DATA },
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{ "\x6F\xC4\x87\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0x00, STR("Solaris Swap"), GPT_KIND_SYSTEM },
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{ "\xC3\x8C\x89\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Usr"), GPT_KIND_DATA },
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{ "\x2B\x64\x8B\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0x00, STR("Solaris Backup"), GPT_KIND_SYSTEM },
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{ "\xC7\x2A\x8D\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Stand"), GPT_KIND_DATA },
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{ "\xE9\xF2\x8E\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Var"), GPT_KIND_DATA },
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{ "\x39\xBA\x90\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris Home"), GPT_KIND_DATA },
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{ "\xA5\x83\x92\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0xbf, STR("Solaris ALTSCTR"), GPT_KIND_DATA },
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{ "\x3B\x5A\x94\x6A\xD2\x1D\xB2\x11\x99\xa6\x08\x00\x20\x73\x66\x31", 0x00, STR("Solaris Cache"), GPT_KIND_SYSTEM },
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{ { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }, 0, NULL, 0 },
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};
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GPT_PARTTYPE gpt_dummy_type =
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{ { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }, 0, STR("Unknown"), GPT_KIND_FATAL };
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//
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// MBR functions
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//
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CHARN * mbr_parttype_name(UINT8 type)
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{
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int i;
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for (i = 0; mbr_types[i].name; i++)
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if (mbr_types[i].type == type)
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return mbr_types[i].name;
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return STR("Unknown");
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}
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UINTN read_mbr(VOID)
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{
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UINTN status;
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UINTN i;
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BOOLEAN used;
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MBR_PARTITION_INFO *table;
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Print(L"\nCurrent MBR partition table:\n");
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// read MBR data
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status = read_sector(0, sector);
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if (status != 0)
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return status;
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// check for validity
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if (*((UINT16 *)(sector + 510)) != 0xaa55) {
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Print(L" No MBR partition table present!\n");
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return 1;
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}
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table = (MBR_PARTITION_INFO *)(sector + 446);
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for (i = 0; i < 4; i++) {
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if (table[i].flags != 0x00 && table[i].flags != 0x80) {
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Print(L" MBR partition table is invalid!\n");
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return 1;
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}
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}
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// check if used
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used = FALSE;
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for (i = 0; i < 4; i++) {
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if (table[i].start_lba > 0 && table[i].size > 0) {
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used = TRUE;
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break;
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}
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}
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if (!used) {
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Print(L" No partitions defined\n");
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return 0;
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}
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// dump current state & fill internal structures
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Print(L" # A Start LBA End LBA Type\n");
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for (i = 0; i < 4; i++) {
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if (table[i].start_lba == 0 || table[i].size == 0)
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continue;
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mbr_parts[mbr_part_count].index = i;
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mbr_parts[mbr_part_count].start_lba = (UINT64)table[i].start_lba;
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mbr_parts[mbr_part_count].end_lba = (UINT64)table[i].start_lba + (UINT64)table[i].size - 1;
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mbr_parts[mbr_part_count].mbr_type = table[i].type;
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mbr_parts[mbr_part_count].active = (table[i].flags == 0x80) ? TRUE : FALSE;
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Print(L" %d %s %12lld %12lld %02x %s\n",
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mbr_parts[mbr_part_count].index + 1,
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mbr_parts[mbr_part_count].active ? STR("*") : STR(" "),
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mbr_parts[mbr_part_count].start_lba,
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mbr_parts[mbr_part_count].end_lba,
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mbr_parts[mbr_part_count].mbr_type,
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mbr_parttype_name(mbr_parts[mbr_part_count].mbr_type));
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mbr_part_count++;
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}
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return 0;
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}
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//
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// GPT functions
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//
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GPT_PARTTYPE * gpt_parttype(UINT8 *type_guid)
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{
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int i;
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for (i = 0; gpt_types[i].name; i++)
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if (guids_are_equal(gpt_types[i].guid, type_guid))
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return &(gpt_types[i]);
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return &gpt_dummy_type;
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}
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UINTN read_gpt(VOID)
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{
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UINTN status;
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GPT_HEADER *header;
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GPT_ENTRY *entry;
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UINT64 entry_lba;
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UINTN entry_count, entry_size, i;
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Print(L"\nCurrent GPT partition table:\n");
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// read GPT header
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status = read_sector(1, sector);
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if (status != 0)
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return status;
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// check signature
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header = (GPT_HEADER *)sector;
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if (header->signature != 0x5452415020494645ULL) {
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Print(L" No GPT partition table present!\n");
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return 0;
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}
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if (header->spec_revision != 0x00010000UL) {
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Print(L" Warning: Unknown GPT spec revision 0x%08x\n", header->spec_revision);
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}
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if ((512 % header->entry_size) > 0 || header->entry_size > 512) {
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Print(L" Error: Invalid GPT entry size (misaligned or more than 512 bytes)\n");
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return 0;
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}
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// read entries
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entry_lba = header->entry_lba;
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entry_size = header->entry_size;
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entry_count = header->entry_count;
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for (i = 0; i < entry_count; i++) {
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if (((i * entry_size) % 512) == 0) {
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status = read_sector(entry_lba, sector);
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if (status != 0)
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return status;
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entry_lba++;
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}
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entry = (GPT_ENTRY *)(sector + ((i * entry_size) % 512));
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if (guids_are_equal(entry->type_guid, empty_guid))
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continue;
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if (gpt_part_count == 0) {
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Print(L" # Start LBA End LBA Type\n");
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}
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gpt_parts[gpt_part_count].index = i;
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gpt_parts[gpt_part_count].start_lba = entry->start_lba;
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gpt_parts[gpt_part_count].end_lba = entry->end_lba;
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gpt_parts[gpt_part_count].mbr_type = 0;
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copy_guid(gpt_parts[gpt_part_count].gpt_type, entry->type_guid);
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gpt_parts[gpt_part_count].gpt_parttype = gpt_parttype(gpt_parts[gpt_part_count].gpt_type);
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gpt_parts[gpt_part_count].active = FALSE;
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Print(L" %d %12lld %12lld %s\n",
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gpt_parts[gpt_part_count].index + 1,
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gpt_parts[gpt_part_count].start_lba,
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gpt_parts[gpt_part_count].end_lba,
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gpt_parts[gpt_part_count].gpt_parttype->name);
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gpt_part_count++;
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}
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if (gpt_part_count == 0) {
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Print(L" No partitions defined\n");
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return 0;
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}
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return 0;
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}
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//
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// detect file system type
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//
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UINTN detect_mbrtype_fs(UINT64 partlba, UINTN *parttype, CHARN **fsname)
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{
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UINTN status;
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UINTN signature, score;
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UINTN sectsize, clustersize, reserved, fatcount, dirsize, sectcount, fatsize, clustercount;
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*fsname = STR("Unknown");
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*parttype = 0;
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// READ sector 0 / offset 0K
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status = read_sector(partlba, sector);
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if (status != 0)
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return status;
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// detect XFS
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memcpy(&signature, sector, sizeof(UINT32));
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if (signature == 0x42534658) {
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*parttype = 0x83;
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*fsname = STR("XFS");
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return 0;
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}
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// detect FAT and NTFS
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sectsize = *((UINT16 *)(sector + 11));
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clustersize = sector[13];
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if (sectsize >= 512 && (sectsize & (sectsize - 1)) == 0 &&
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clustersize > 0 && (clustersize & (clustersize - 1)) == 0) {
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// preconditions for both FAT and NTFS are now met
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if (CompareMem(sector + 3, "NTFS ", 8) == 0) {
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*parttype = 0x07;
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*fsname = STR("NTFS");
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return 0;
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}
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score = 0;
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// boot jump
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if ((sector[0] == 0xEB && sector[2] == 0x90) ||
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sector[0] == 0xE9)
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score++;
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// boot signature
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if (sector[510] == 0x55 && sector[511] == 0xAA)
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score++;
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// reserved sectors
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reserved = *((UINT16 *)(sector + 14));
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if (reserved == 1 || reserved == 32)
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score++;
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// number of FATs
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fatcount = sector[16];
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if (fatcount == 2)
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score++;
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// number of root dir entries
|
|
dirsize = *((UINT16 *)(sector + 17));
|
|
// sector count (16-bit and 32-bit versions)
|
|
sectcount = *((UINT16 *)(sector + 19));
|
|
if (sectcount == 0)
|
|
sectcount = *((UINT32 *)(sector + 32));
|
|
// media byte
|
|
if (sector[21] == 0xF0 || sector[21] >= 0xF8)
|
|
score++;
|
|
// FAT size in sectors
|
|
fatsize = *((UINT16 *)(sector + 22));
|
|
if (fatsize == 0)
|
|
fatsize = *((UINT32 *)(sector + 36));
|
|
|
|
// determine FAT type
|
|
dirsize = ((dirsize * 32) + (sectsize - 1)) / sectsize;
|
|
clustercount = sectcount - (reserved + (fatcount * fatsize) + dirsize);
|
|
clustercount /= clustersize;
|
|
|
|
if (score >= 3) {
|
|
if (clustercount < 4085) {
|
|
*parttype = 0x01;
|
|
*fsname = STR("FAT12");
|
|
} else if (clustercount < 65525) {
|
|
*parttype = 0x0e;
|
|
*fsname = STR("FAT16");
|
|
} else {
|
|
*parttype = 0x0c;
|
|
*fsname = STR("FAT32");
|
|
}
|
|
// TODO: check if 0e and 0c are okay to use, maybe we should use 06 and 0b instead...
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// READ sector 2 / offset 1K
|
|
status = read_sector(partlba + 2, sector);
|
|
if (status != 0)
|
|
return status;
|
|
|
|
// detect HFS+
|
|
memcpy(&signature, sector, sizeof(UINT16));
|
|
if (signature == 0x4442) {
|
|
*parttype = 0xaf;
|
|
if (*((UINT16 *)(sector + 0x7c)) == 0x2B48)
|
|
*fsname = STR("HFS Extended (HFS+)");
|
|
else
|
|
*fsname = STR("HFS Standard");
|
|
return 0;
|
|
} else if (signature == 0x2B48) {
|
|
*parttype = 0xaf;
|
|
*fsname = STR("HFS Extended (HFS+)");
|
|
return 0;
|
|
}
|
|
|
|
// detect ext2/ext3
|
|
signature = *((UINT16 *)(sector + 56));
|
|
if (signature == 0xEF53) {
|
|
*parttype = 0x83;
|
|
if (*((UINT16 *)(sector + 92)) & 0x0004)
|
|
*fsname = STR("ext3");
|
|
else
|
|
*fsname = STR("ext2");
|
|
return 0;
|
|
}
|
|
|
|
// READ sector 128 / offset 64K
|
|
status = read_sector(partlba + 128, sector);
|
|
if (status != 0)
|
|
return status;
|
|
|
|
// detect ReiserFS
|
|
if (CompareMem(sector + 52, "ReIsErFs", 8) == 0 ||
|
|
CompareMem(sector + 52, "ReIsEr2Fs", 9) == 0 ||
|
|
CompareMem(sector + 52, "ReIsEr3Fs", 9) == 0) {
|
|
*parttype = 0x83;
|
|
*fsname = STR("ReiserFS");
|
|
return 0;
|
|
}
|
|
|
|
// detect Reiser4
|
|
if (CompareMem(sector, "ReIsEr4", 7) == 0) {
|
|
*parttype = 0x83;
|
|
*fsname = STR("Reiser4");
|
|
return 0;
|
|
}
|
|
|
|
// READ sector 64 / offset 32K
|
|
status = read_sector(partlba + 64, sector);
|
|
if (status != 0)
|
|
return status;
|
|
|
|
// detect JFS
|
|
if (CompareMem(sector, "JFS1", 4) == 0) {
|
|
*parttype = 0x83;
|
|
*fsname = STR("JFS");
|
|
return 0;
|
|
}
|
|
|
|
// READ sector 16 / offset 8K
|
|
status = read_sector(partlba + 16, sector);
|
|
if (status != 0)
|
|
return status;
|
|
|
|
// detect ReiserFS
|
|
if (CompareMem(sector + 52, "ReIsErFs", 8) == 0 ||
|
|
CompareMem(sector + 52, "ReIsEr2Fs", 9) == 0 ||
|
|
CompareMem(sector + 52, "ReIsEr3Fs", 9) == 0) {
|
|
*parttype = 0x83;
|
|
*fsname = STR("ReiserFS");
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|