On Tue, Aug 3, 2010 at 18:08, Tejun Heo <tj@kernel.org> wrote:
Yeah, we have something similar in mind since a while, to be able to
safely boot a box without an initramfs, and to be able to to specify
something like:
root=PARTUUID=6547567-575-7567-567567-57
root=PARTLABEL=foo
on the kernel commandline.
The current 'blkid' already reports stuff like, to have the same
information in userspace:
$ blkid -p -oudev /dev/sde1
ID_FS_LABEL=10GB
ID_FS_LABEL_ENC=10GB
ID_FS_UUID=5aafa1bb-70a7-4fe6-b93f-30658ec99fac
ID_FS_UUID_ENC=5aafa1bb-70a7-4fe6-b93f-30658ec99fac
ID_FS_VERSION=1.0
ID_FS_TYPE=ext4
ID_FS_USAGE=filesystem
ID_PART_ENTRY_SCHEME=gpt
ID_PART_ENTRY_UUID=1f765dcb-5214-bd47-b1c5-f2f18848335e
ID_PART_ENTRY_TYPE=a2a0d0eb-e5b9-3344-87c0-68b6b72699c7
ID_PART_ENTRY_NUMBER=1
I guess we want to store these identifiers directly into the partition
structure, independent of the partition format, so any code can
register a callback for a new block device, and can just check if
that's the device in question. Walking the block devices would just be
something usual provided by the driver core, instead of having some
specific EFI walk functions.
Kay
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