Bug#924675: Add iSCSI iBFT support to disk-detect

[Mauricio Oliveira <mauricio.oliveira@canonical.com>]

Package: disk-detect
Version: 1.136
Severity: wishlist
Tags: patch

Hi,

This patch adds support for iSCSI iBFT (iSCSI Boot Firmware Table).

iBFT provides iSCSI configuration in the system firmware tables,
often used for automatic installs, mainly in larger deployments.

It can be made available to userspace with a kernel module, and
used accordingly by the iscsistart tool to configure networking,
iSCSI sessions, that brings up the intended target's iSCSI LUNs.

If the (new) option 'disk-detect/ibft/enable' is set to 'true'
(similarly to other options) disk-detect performs those steps,
and the iSCSI LUNs become available to the installer.

This is done before the check for disks detected (differently
from other options), so that diskless systems with only iSCSI
disks (e.g., guests) do not stall in the detect/retry loop as
there are no other disks.

P.S.: I understand the timing may not be good for new features,
but I would really appreciate any feedback about this patch if
at all possible.  Coming in shortly: test procedure and syslog.

Thank you,
Mauricio

-- 
Mauricio Faria de Oliveira