[Bug 2097808] [NEW] IPv6 support for iBFT iSCSI boot

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[Impact]
Using IPv4-specific APIs during NIC setup based on iBFT information, regardless of the IP version, results in the following error in IPv6-only environments:

Setting up software interface ens300f0np0
iscsistart: Invalid or missing ipaddr in fw entry
Setting up software interface ens300f0np0 failed

[Fix]
Upstream has a patch to resolve this issue.

commit 72c2b97c19a2d0710b38802d50813feb682278f7
Author:     yukariatlas <49406051+yukariatlas at users.noreply.github.com>
Date: Fri Dec 27 11:03:43 2024 -0800

    IPv6 support for iBFT iSCSI boot (#493)

    * Avoid reassigning a char pointer variable to a newly allocated
string

    Introduce two separate variables to clearly distinguish their usage.

    Signed-off-by: Chengen Du <chengen.du at canonical.com>

    * IPv6 support for iBFT iSCSI boot

    Use IPv4-specific APIs during NIC setup based on iBFT information,
    regardless of the IP version, which leads to the following error
    in IPv6-only environments:

    Setting up software interface ens300f0np0
    iscsistart: Invalid or missing ipaddr in fw entry
    Setting up software interface ens300f0np0 failed

    To address this, the process now determines the IP version first
    and calls the appropriate functions to handle NIC setup.

    Signed-off-by: Chengen Du <chengen.du at canonical.com>

    ---------

    Signed-off-by: Chengen Du <chengen.du at canonical.com>

[Test Plan]
1. Set up a machine with an iSCSI backend in an IPv6-only environment.  
2. Power on the machine and verify that the following error does not occur:  
   Setting up software interface ens300f0np0  
   iscsistart: Invalid or missing ipaddr in fw entry  
   Setting up software interface ens300f0np0 failed  
3. Ensure that the machine can successfully boot via iSCSI in an IPv4 environment.

[Where problems could occur]
The fix primarily adds IPv6 support for iBFT iSCSI boot and should not impact the IPv4 scenario. However, if any regressions occur, the iBFT iSCSI boot mechanism may be affected, potentially preventing the machine from booting via iSCSI.

** Affects: open-iscsi (Ubuntu)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress

** Affects: open-iscsi (Ubuntu Focal)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress

** Affects: open-iscsi (Ubuntu Jammy)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress

** Affects: open-iscsi (Ubuntu Noble)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress

** Affects: open-iscsi (Ubuntu Oracular)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress

** Affects: open-iscsi (Ubuntu Plucky)
     Importance: Undecided
     Assignee: Chengen Du (chengendu)
         Status: In Progress


** Tags: patch
-- 
IPv6 support for iBFT iSCSI boot
https://bugs.launchpad.net/bugs/2097808
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