netdev - Re: [PATCH bpf v2 1/3] bpf_redirect_neigh: Support supplying the nexthop as a helper parameter

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Message-ID: <20201020093405.59079473@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Tue, 20 Oct 2020 09:34:05 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH bpf v2 1/3] bpf_redirect_neigh: Support supplying the
 nexthop as a helper parameter

On Tue, 20 Oct 2020 12:51:02 +0200 Toke Høiland-Jørgensen wrote:
> +struct bpf_nh_params {
> +	u8 nh_family;
> +	union {
> +		__u32 ipv4_nh;
> +		struct in6_addr ipv6_nh;
> +	};
> +};

Folks, not directly related to this set, but there's a SRv6 patch going
around which adds ifindex, otherwise nh can't be link local.

I wonder if we want to consider this use case from the start (or the
close approximation of start in this case ;)).