netdev - Re: [RFC ipsec-next v2 0/8] Add IP-TFS mode to xfrm

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Message-ID: <ZVHNI7NaK/KtABIL@gauss3.secunet.de>
Date: Mon, 13 Nov 2023 08:15:47 +0100
From: Steffen Klassert <steffen.klassert@...unet.com>
To: Christian Hopps <chopps@...pps.org>
CC: <devel@...ux-ipsec.org>, <netdev@...r.kernel.org>, Christian Hopps
	<chopps@...n.net>
Subject: Re: [RFC ipsec-next v2 0/8] Add IP-TFS mode to xfrm

On Sun, Nov 12, 2023 at 10:52:11PM -0500, Christian Hopps wrote:
> From: Christian Hopps <chopps@...n.net>
> 
> This patchset adds a new xfrm mode implementing on-demand IP-TFS. IP-TFS
> (AggFrag encapsulation) has been standardized in RFC9347.
> 
> Link: https://www.rfc-editor.org/rfc/rfc9347.txt
> 
> This feature supports demand driven (i.e., non-constant send rate) IP-TFS to
> take advantage of the AGGFRAG ESP payload encapsulation. This payload type
> supports aggregation and fragmentation of the inner IP packet stream which in
> turn yields higher small-packet bandwidth as well as reducing MTU/PMTU issues.
> Congestion control is unimplementated as the send rate is demand driven rather
> than constant.
> 
> In order to allow loading this fucntionality as a module a set of callbacks
> xfrm_mode_cbs has been added to xfrm as well.

I did a multiple days peer review with Chris on this pachset. So my
concerns are already addressed.

Further reviews are welcome! This is a bigger change and it would
be nice if more people could look at it.

Thanks!