Bug#442382: please add support for multipath devices

[Guido Guenther]

Package: grub
Version: 0.97-29
Severity: wishlist
Tags: patch

Hi,
while adding multipath support to d-i
(http://wiki.debian.org/DebianInstaller/MultipathSupport) I noticed that
running grub-install on multipath'ed devices currently fails. The first
part of the attached patch adds the proper code to grub-install when
user_friendly_names are used (as done by d-i).  The second part
(device.c) returns the correct partition names (Partition names are
/dev/mapper/mpath[0-9]\+-part[0-9]\+ where the underlying dm device is
/dev/mapper/mpath[0-9]\+). Ideally we'd check if the device is indeed a
device mapper device by looking up the maptype, but we'd need to link
against libdevmapper therefore - would this be an option - maybe for
grub2?
Cheers,
 -- Guido
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