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

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Message-ID: <87zh4g22ro.fsf@toke.dk>
Date:   Tue, 20 Oct 2020 20:03:39 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Jakub Kicinski <kuba@...nel.org>
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

Jakub Kicinski <kuba@...nel.org> writes:

> 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 ;)).

The ifindex is there, it's just in the function call signature instead
of the struct... Or did you mean something different?

-Toke