linux-kernel - Re: [PATCH 1/2] bonding: fix xfrm offload feature setup on active-backup mode

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Message-ID: <aMjSVwIv7f9VDvHL@fedora>
Date: Tue, 16 Sep 2025 02:58:31 +0000
From: Hangbin Liu <liuhangbin@...il.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, Jay Vosburgh <jv@...sburgh.net>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>,
	Petr Machata <petrm@...dia.com>, linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] bonding: fix xfrm offload feature setup on
 active-backup mode

On Mon, Sep 15, 2025 at 06:41:23PM -0700, Jakub Kicinski wrote:
> On Mon, 15 Sep 2025 08:37:41 +0000 Hangbin Liu wrote:
> > The active-backup bonding mode supports XFRM ESP offload. However, when
> > a bond is added using command like `ip link add bond0 type bond mode 1
> > miimon 100`, the `ethtool -k` command shows that the XFRM ESP offload is
> > disabled. This occurs because, in bond_newlink(), we change bond link
> > first and register bond device later. So the XFRM feature update in
> > bond_option_mode_set() is not called as the bond device is not yet
> > registered, leading to the offload feature not being set successfully.
> > 
> > To resolve this issue, we can modify the code order in bond_newlink() to
> > ensure that the bond device is registered first before changing the bond
> > link parameters. This change will allow the XFRM ESP offload feature to be
> > correctly enabled.
> 
> This reportedly doesn't apply.. I suppose we want it to go via net?

Ah, yes. I forgot to add the target repo. I need to write a git format-patch
wrapper to remind me adding it...

Regards
Hangbin