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d5528d5e91
GUID partition entry defined to have a partition name as 36 UTF-16LE
code units. This means that on big-endian platforms ASCII symbols
would be read with 0xXX00 efi_char16_t character code. In order to
correctly extract ASCII characters from a partition name field we
should be converted from 16LE to CPU architecture.
The problem exists on all big endian platforms.
[ mingo: Minor edits. ]
Fixes: eec7ecfede ("genhd, efi: add efi partition metadata to hd_structs")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nikolai Merinov <n.merinov@inango-systems.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200308080859.21568-29-ardb@kernel.org
Link: https://lore.kernel.org/r/797777312.1324734.1582544319435.JavaMail.zimbra@inango-systems.com/
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/************************************************************
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* EFI GUID Partition Table
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* Per Intel EFI Specification v1.02
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* http://developer.intel.com/technology/efi/efi.htm
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*
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* By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000
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* Copyright 2000,2001 Dell Inc.
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************************************************************/
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#ifndef FS_PART_EFI_H_INCLUDED
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#define FS_PART_EFI_H_INCLUDED
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#include <linux/types.h>
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#include <linux/fs.h>
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#include <linux/genhd.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/efi.h>
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#include <linux/compiler.h>
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#define MSDOS_MBR_SIGNATURE 0xaa55
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#define EFI_PMBR_OSTYPE_EFI 0xEF
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#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
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#define GPT_MBR_PROTECTIVE 1
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#define GPT_MBR_HYBRID 2
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#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
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#define GPT_HEADER_REVISION_V1 0x00010000
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#define GPT_PRIMARY_PARTITION_TABLE_LBA 1
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#define PARTITION_SYSTEM_GUID \
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EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
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0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
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#define LEGACY_MBR_PARTITION_GUID \
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EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
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0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
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#define PARTITION_MSFT_RESERVED_GUID \
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EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
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0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
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#define PARTITION_BASIC_DATA_GUID \
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EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
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0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
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#define PARTITION_LINUX_RAID_GUID \
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EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
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0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
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#define PARTITION_LINUX_SWAP_GUID \
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EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
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0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
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#define PARTITION_LINUX_LVM_GUID \
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EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
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0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
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typedef struct _gpt_header {
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__le64 signature;
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__le32 revision;
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__le32 header_size;
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__le32 header_crc32;
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__le32 reserved1;
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__le64 my_lba;
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__le64 alternate_lba;
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__le64 first_usable_lba;
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__le64 last_usable_lba;
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efi_guid_t disk_guid;
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__le64 partition_entry_lba;
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__le32 num_partition_entries;
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__le32 sizeof_partition_entry;
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__le32 partition_entry_array_crc32;
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/* The rest of the logical block is reserved by UEFI and must be zero.
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* EFI standard handles this by:
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*
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* uint8_t reserved2[ BlockSize - 92 ];
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*/
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} __packed gpt_header;
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typedef struct _gpt_entry_attributes {
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u64 required_to_function:1;
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u64 reserved:47;
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u64 type_guid_specific:16;
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} __packed gpt_entry_attributes;
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typedef struct _gpt_entry {
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efi_guid_t partition_type_guid;
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efi_guid_t unique_partition_guid;
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__le64 starting_lba;
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__le64 ending_lba;
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gpt_entry_attributes attributes;
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__le16 partition_name[72/sizeof(__le16)];
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} __packed gpt_entry;
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typedef struct _gpt_mbr_record {
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u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */
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u8 start_head; /* unused by EFI, pt start in CHS */
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u8 start_sector; /* unused by EFI, pt start in CHS */
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u8 start_track;
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u8 os_type; /* EFI and legacy non-EFI OS types */
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u8 end_head; /* unused by EFI, pt end in CHS */
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u8 end_sector; /* unused by EFI, pt end in CHS */
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u8 end_track; /* unused by EFI, pt end in CHS */
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__le32 starting_lba; /* used by EFI - start addr of the on disk pt */
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__le32 size_in_lba; /* used by EFI - size of pt in LBA */
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} __packed gpt_mbr_record;
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typedef struct _legacy_mbr {
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u8 boot_code[440];
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__le32 unique_mbr_signature;
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__le16 unknown;
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gpt_mbr_record partition_record[4];
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__le16 signature;
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} __packed legacy_mbr;
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/* Functions */
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extern int efi_partition(struct parsed_partitions *state);
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#endif
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