• Karel Zak's avatar
    The size of EFI GPT header is not static, but whole sector is · dbd508a2
    Karel Zak authored
    allocated for the header. The HeaderSize field must be greater
    than 92 (= sizeof(struct gpt_header) and must be less than or
    equal to the logical block size.
    
    It means we have to read whole sector with the header, because the
    header crc32 checksum is calculated according to HeaderSize.
    
    For more details see UEFI standard (version 2.3, May 2009):
      - 5.3.1 GUID Format overview, page 93
      - Table 13. GUID Partition Table Header, page 96
    Signed-off-by: default avatarKarel Zak <kzak@redhat.com>
    Cc: Jens Axboe <jens.axboe@oracle.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    dbd508a2
efi.h 4.33 KB