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netboot: Introduce support for nbd protocol v3

Description

The plan is to add a new cmdline argument ''nbd.v3' that could be parsed by the initrd script used for netboot.

  • if nbd.v3=1 , then script will try to use newstyle nbd protocol. It will request an image named "default-image", or another one if specified by argument "nbd.image=....."

  • otherwise, we fall back to the legacy client (implemented with busybox, no image name required) - this is the current required mode for CI.

Amongst other features, the new nbd protocol will allow to serve different images to multiple boards with only one nbd server.

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Walt Miner 
July 9, 2019 at 5:03 PM

Close for HH RC2 and GG 7.0.3

ronan Le Martret 
June 25, 2019 at 9:33 PM

Stephane Desneux 
June 25, 2019 at 3:32 PM

: I'd say yes. , can you push a cherry-pick on guppy to see what happens ? Build should be ok on CI. Runtime would then be needed to confirm that eveything works.

Walt Miner 
June 25, 2019 at 3:12 PM

Should this be cherry picked to guppy as well?

Stephane Desneux 
May 7, 2018 at 10:23 AM

nbd-client is only in version 3.11 in openembedded (released in 2015). Maybe an upgrade to 3.17 may be necessary.

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Created May 7, 2018 at 10:18 AM
Updated September 19, 2019 at 12:06 PM
Resolved June 25, 2019 at 1:41 PM