netdev - Re: [net-next V2 01/17] net/mlx5: E-Switch, Refactor setting source port

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Message-ID: <ygnhtuqngebi.fsf@nvidia.com>
Date:   Mon, 8 Feb 2021 10:21:21 +0200
From:   Vlad Buslov <vladbu@...dia.com>
To:     Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
CC:     Saeed Mahameed <saeed@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>,
        "Mark Bloch" <mbloch@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [net-next V2 01/17] net/mlx5: E-Switch, Refactor setting source
 port


On Sat 06 Feb 2021 at 20:13, Marcelo Ricardo Leitner <marcelo.leitner@...il.com> wrote:
> Hi,
>
> I didn't receive the cover letter, so I'm replying on this one. :-)
>
> This is nice. One thing is not clear to me yet. From the samples on
> the cover letter:
>
> $ tc -s filter show dev enp8s0f0_1 ingress
> filter protocol ip pref 4 flower chain 0
> filter protocol ip pref 4 flower chain 0 handle 0x1
>   dst_mac 0a:40:bd:30:89:99
>   src_mac ca:2e:a7:3f:f5:0f
>   eth_type ipv4
>   ip_tos 0/0x3
>   ip_flags nofrag
>   in_hw in_hw_count 1
>         action order 1: tunnel_key  set
>         src_ip 7.7.7.5
>         dst_ip 7.7.7.1
>         ...
>
> $ tc -s filter show dev vxlan_sys_4789 ingress
> filter protocol ip pref 4 flower chain 0
> filter protocol ip pref 4 flower chain 0 handle 0x1
>   dst_mac ca:2e:a7:3f:f5:0f
>   src_mac 0a:40:bd:30:89:99
>   eth_type ipv4
>   enc_dst_ip 7.7.7.5
>   enc_src_ip 7.7.7.1
>   enc_key_id 98
>   enc_dst_port 4789
>   enc_tos 0
>   ...
>
> These operations imply that 7.7.7.5 is configured on some interface on
> the host. Most likely the VF representor itself, as that aids with ARP
> resolution. Is that so?
>
> Thanks,
> Marcelo

Hi Marcelo,

The tunnel endpoint IP address is configured on VF that is represented
by enp8s0f0_0 representor in example rules. The VF is on host.

Regards,
Vlad