efinet SNP issue affects iscsi boot

[Micah Parrish]

Hi, new subscriber here.  We have a problem with Grub 2 and its use of 
SNP instead of MNP.  Our UEFI driver for a network card parses the 
relevant DHCP options for iSCSI boot, generates an iBFT table, then gets 
closed by Grub when it opens the SNP interface. The driver removes the 
iBFT table as part of normal unload cleanup.  I think this should happen 
with the Tianocore UEFI reference driver as well.  The problem is often 
masked or does not occur when there are multiple network ports enabled.  
It occurs with several different vendors NICs.

Possible solutions I see:

1. Grub parses the DHCP options and creates its own iBFT.

2. Grub copies the already generated iBFT before destroying the interface.

3. Grub opens the network interface MNP instead of SNP.

Although I am a neophyte at grub and UEFI development, I would like to 
start a discussion on possible solutions.  Has anyone else seen this?


Micah Parrish
address@hidden
Linux OS Engineer
Hewlett-Packard Enterprise