[PATCH] Allow user to choose between path or fs-label instead of UUID

[Pete Appleton]

Hi all,

The file attached is intended to allow a Linux user to easily specify 
whether GRUB2 should use the traditional device path (/dev/sda1) or the 
filesystem label instead of the default UUID scheme.  This functionality 
is currently supported by GRUB2 itself but the peripheral files 
(grub-mkconfig, 10-linux etc) don't directly support it, requiring the 
user to edit the distribution-supplied files on their installation with 
the potential for consequent upgrade conflicts.

This patch adds support for a new environment variable 
GRUB_DEVICE_IDENTIFICATION taking as value one of {uuid, label, path}; 
if not set or invalid then it defaults to uuid so that the current 
semantics are respected.  If set to label then the 'search' clause and 
root=XXX kernel parameter are written using file system label syntax as 
opposed to the current single behaviour of device path if 
GRUB_DISABLE_LINUX_UUID=true

This patch was written after needing the functionality in my environment 
as I frequently move filesystems around a multi-spindle system (using 
the label to keep track of them) and seeing a few articles online 
advising various modifications to distribution supplied files; I hope 
that it is deemed useful enough to get incorporated into trunk to remove 
this minor niggle with a great product.

Thanks,

Pete Appleton

linux_fslabel_support.patch
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