netdev - Re: [PATCH 1/2] Revert "xfrm: interface with if

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Date:   Tue, 1 Mar 2022 15:28:56 +0200
From:   Eyal Birger <eyal.birger@...il.com>
To:     kailueke@...ux.microsoft.com
Cc:     netdev@...r.kernel.org,
        Steffen Klassert <steffen.klassert@...unet.com>
Subject: Re: [PATCH 1/2] Revert "xfrm: interface with if_id 0 should return error"

Hi Kai,

On Tue, Mar 1, 2022 at 3:15 PM <kailueke@...ux.microsoft.com> wrote:
>
> From: Kai Lueke <kailueke@...ux.microsoft.com>
>
> This reverts commit 8dce43919566f06e865f7e8949f5c10d8c2493f5 because it
> breaks userspace (e.g., Cilium is affected because it used id 0 for the
> dummy state https://github.com/cilium/cilium/pull/18789).
>
> Signed-off-by: Kai Lueke <kailueke@...ux.microsoft.com>

>From the pull request you mentioned I understand the commit which affected
Cilium userspace is 68ac0f3810e7
("xfrm: state and policy should fail if XFRMA_IF_ID 0").

Whereas 8dce43919566 ("xfrm: interface with if_id 0 should return error")
involves xfrm interfaces which don't appear in the pull request.

In which case, why should that commit be reverted?

Eyal.