netdev - Re: Need of advice for XDP sockets on top of the interfaces behind a Linux bonding device

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Message-ID: <CAJEV1igqV-Yb3YvZEiMOBCGyZXRQ2KTS=yq483+xOVFehvgDAw@mail.gmail.com>
Date: Sat, 27 Jan 2024 07:08:27 +0200
From: Pavel Vazharov <pavel@...e.net>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Toke Høiland-Jørgensen <toke@...nel.org>, 
	netdev@...r.kernel.org
Subject: Re: Need of advice for XDP sockets on top of the interfaces behind a
 Linux bonding device

On Sat, Jan 27, 2024 at 6:39 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Sat, 27 Jan 2024 05:58:55 +0200 Pavel Vazharov wrote:
> > > Well, it will be up to your application to ensure that it is not. The
> > > XDP program will run before the stack sees the LACP management traffic,
> > > so you will have to take some measure to ensure that any such management
> > > traffic gets routed to the stack instead of to the DPDK application. My
> > > immediate guess would be that this is the cause of those warnings?
> >
> > Thank you for the response.
> > I already checked the XDP program.
> > It redirects particular pools of IPv4 (TCP or UDP) traffic to the application.
> > Everything else is passed to the Linux kernel.
> > However, I'll check it again. Just to be sure.
>
> What device driver are you using, if you don't mind sharing?
> The pass thru code path may be much less well tested in AF_XDP
> drivers.
These are the kernel version and the drivers for the 3 ports in the
above bonding.
~# uname -a
Linux 6.3.2 #1 SMP Wed May 17 08:17:50 UTC 2023 x86_64 GNU/Linux
~# lspci -v | grep -A 16 -e 1b:00.0 -e 3b:00.0 -e 5e:00.0
1b:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit
SFI/SFP+ Network Connection (rev 01)
       ...
        Kernel driver in use: ixgbe
--
3b:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit
SFI/SFP+ Network Connection (rev 01)
        ...
        Kernel driver in use: ixgbe
--
5e:00.0 Ethernet controller: Intel Corporation 82599ES 10-Gigabit
SFI/SFP+ Network Connection (rev 01)
        ...
        Kernel driver in use: ixgbe

I think they should be well supported, right?
So far, it seems that the present usage scenario should work and the
problem is somewhere in my code.
I'll double check it again and try to simplify everything in order to
pinpoint the problem.