From: Karel Zak Date: Fri, 14 Jul 2017 10:48:18 +0000 (+0200) Subject: libfdisk: make fdisk compliant to UEFI/GPT specification on PMBR X-Git-Tag: v2.31-rc1~198 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8ffa3b651d7e74acba8f1d831b7f68fdb3c66aae;p=thirdparty%2Futil-linux.git libfdisk: make fdisk compliant to UEFI/GPT specification on PMBR The PMBR partition record should be StartingCHS=0x002000 (0/0/2) and EndingCHS=0xFFFFFF (1023/255/63) Addresses: https://github.com/karelzak/util-linux/issues/485 Signed-off-by: Karel Zak --- diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c index 40d0912ecf..4904b4deae 100644 --- a/libfdisk/src/gpt.c +++ b/libfdisk/src/gpt.c @@ -508,11 +508,12 @@ static int gpt_mknew_pmbr(struct fdisk_context *cxt) return rc; pmbr = (struct gpt_legacy_mbr *) cxt->firstsector; + memset(pmbr->partition_record, 0, sizeof(pmbr->partition_record)); pmbr->signature = cpu_to_le16(MSDOS_MBR_SIGNATURE); pmbr->partition_record[0].os_type = EFI_PMBR_OSTYPE; - pmbr->partition_record[0].start_sector = 1; - pmbr->partition_record[0].end_head = 0xFE; + pmbr->partition_record[0].start_sector = 2; + pmbr->partition_record[0].end_head = 0xFF; pmbr->partition_record[0].end_sector = 0xFF; pmbr->partition_record[0].end_track = 0xFF; pmbr->partition_record[0].starting_lba = cpu_to_le32(1); @@ -1937,8 +1938,8 @@ static int gpt_write_pmbr(struct fdisk_context *cxt) pmbr->signature = cpu_to_le16(MSDOS_MBR_SIGNATURE); pmbr->partition_record[0].os_type = EFI_PMBR_OSTYPE; - pmbr->partition_record[0].start_sector = 1; - pmbr->partition_record[0].end_head = 0xFE; + pmbr->partition_record[0].start_sector = 2; + pmbr->partition_record[0].end_head = 0xFF; pmbr->partition_record[0].end_sector = 0xFF; pmbr->partition_record[0].end_track = 0xFF; pmbr->partition_record[0].starting_lba = cpu_to_le32(1);