[PATCH 04/16] part: detect EFI system partition

[Punit Agrawal]

Hi Heinrich,

Heinrich Schuchardt <xypron.glpk at gmx.de> writes:

> 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 <xypron.glpk at gmx.de>
> ---
>  disk/part_dos.c | 10 ++++++++--
>  disk/part_efi.c | 12 ++++++++----
>  include/part.h  | 11 ++++++++++-
>  3 files changed, 26 insertions(+), 7 deletions(-)
>
> diff --git a/disk/part_dos.c b/disk/part_dos.c

[...]

> diff --git a/include/part.h b/include/part.h
> index 0b5cf3d5e8..a63d1d0cda 100644
> --- a/include/part.h
> +++ b/include/part.h
> @@ -51,13 +51,22 @@ struct block_drvr {
>  #define PART_TYPE_LEN 32
>  #define MAX_SEARCH_PARTITIONS 64
>
> +#define PART_BOOTABLE			1
> +#define PART_EFI_SYSTEM_PARTITION	2
> +

Maybe you missed my comments on the previous version [0].

As the above defines are used as bit positions, please consider using
BIT() for clarity.

Thanks,
Punit

[0] https://lists.denx.de/pipermail/u-boot/2020-March/404081.html

>  typedef struct disk_partition {
>  	lbaint_t	start;	/* # of first block in partition	*/
>  	lbaint_t	size;	/* number of blocks in partition	*/
>  	ulong	blksz;		/* block size in bytes			*/
>  	uchar	name[PART_NAME_LEN];	/* partition name			*/
>  	uchar	type[PART_TYPE_LEN];	/* string type description		*/
> -	int	bootable;	/* Active/Bootable flag is set		*/
> +	/*
> +	 * The bootable is a bitmask with the following fields:
> +	 *
> +	 * PART_BOOTABLE		the MBR bootable flag is set
> +	 * PART_EFI_SYSTEM_PARTITION	the partition is an EFI system partition
> +	 */
> +	int	bootable;
>  #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
>  	char	uuid[UUID_STR_LEN + 1];	/* filesystem UUID as string, if exists	*/
>  #endif
> --
> 2.25.1