u-boot.git/disk/part_dos.c, branch v2021.04

disk: part_dos: update partition table entries after write

2021-02-01T21:32:06+00:00

Fixes issues when switching from GPT to MBR partition tables.

Signed-off-by: Gary Bisson 
Acked-by: Marek Szyprowski

disk: dos: add code for creating MBR partition layout

2021-01-15T20:33:09+00:00

Add a code for creating and writing MBR partition layout. The code generates
similar layout of EBRs (Exteneded Block Records) and logical volumes as
Linux's fdisk utility.

Signed-off-by: Marek Szyprowski

disk: dos: make some functions static

2021-01-15T20:32:47+00:00

Make functions not used outside this file static.

Signed-off-by: Marek Szyprowski 
[trini: Use __maybe_unused as there are cases they may not be used]
Signed-off-by: Tom Rini

disk: dos: use generic macro for unaligned le32 access

2021-01-15T19:38:00+00:00

Use a generic helper for reading LE32 integers.

Signed-off-by: Marek Szyprowski

disk: dos: add some defines for the hardcoded numbers

2021-01-15T19:38:00+00:00

Add some handy defines for some hardcoded magic numbers related to
extended partition handling.

Signed-off-by: Marek Szyprowski

disk: dos: rename write_mbr_partition to write_mbr_sector

2021-01-15T19:38:00+00:00

write_mbr_partition() function name is a bit misleading, so rename it to
write_mbr_sector(). This is a preparation for adding code for writing a
complete MBR partition layout.

Signed-off-by: Marek Szyprowski

common: Drop part.h from common header

2020-05-18T21:33:33+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

part: Drop disk_partition_t typedef

2020-05-18T21:33:33+00:00

We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.

Signed-off-by: Simon Glass

part: detect EFI system partition

2020-04-30T08:25:07+00:00

Up to now for MBR and GPT partitions the info field 'bootable' was set to 1
if either the partition was an EFI system partition or the bootable flag
was set.

Turn info field 'bootable' into a bit mask with separate bits for bootable
and EFI system partition.

This will allow us to identify the EFI system partition in the UEFI
sub-system.

Signed-off-by: Heinrich Schuchardt

disk: part_dos: correctly detect DOS PBR

2019-10-31T11:22:53+00:00

The signature 0x55 0xAA in bytes 510 and 511 of the first sector can either
indicate a DOS partition table of the first sector of a FAT file system.

The current code tries to check if the partition table is valid by looking
at the boot indicator of the partition entries. But first of all it does
not count from 0 to 3 but only from 0 to 2. And second it misses to
increment the pointer for the partition entry.

If it is a FAT file system can be discovered by looking for the text 'FAT'
at offset 0x36 or 'FAT32' at offset 0x52. In a DOS PBR there are no
partition entries, so those bytes are undefined. Don't require the byte at
offset 0x1BE to differ from 0x00 and 0x80.

With the patch the logic is changed as follows:

If the partition table has either an invalid boot flag for any partition or
has no partition at all, check if the first sector is a DOS PBR by looking
at the FAT* signature.

Signed-off-by: Heinrich Schuchardt