gpt: Add no_automount partition flag

Add user requested support for GPT partition type attribute bit 63 [1]
so the no-auto flag in the systemd originated Discoverable Partitions
Specification [2] can be manipulated.  The UEFI specification [3] says
partition attribute bits 48 to 63 are partition type specific, however
the DPS [2] and Microsoft [4] use the bit 63 to mean no automounting /
assign no drive letter and apply it to multiple partition types so don't
restrict its application.

[1] Request for GPT partition attribute bit 63 "no automount" editing
    support
    https://gitlab.gnome.org/GNOME/gparted/-/issues/214
[2] The Discoverable Partitions Specification (DPS),
    Partition Attribute Flags
    https://uapi-group.org/specifications/specs/discoverable_partitions_specification/
[3] UEFI Specification, version 2.8,
    Table 24. Defined GPT Partition Entry - Attributes
    https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_final.pdf
[4] CREATE_PARTITION_PARAMETERS structure (vds.h)
    https://learn.microsoft.com/en-gb/windows/win32/api/vds/ns-vds-create_partition_parameters

Signed-off-by: Mike Fleetwood <mike.fleetwood@googlemail.com>
Signed-off-by: Brian C. Lane <bcl@redhat.com>

0 files changed, 0 insertions, 0 deletions