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

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On 10/20/20 12:03 PM, Toke Høiland-Jørgensen wrote:
> Jakub Kicinski <kuba@xxxxxxxxxx> 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?
> 

ifindex as the first argument qualifies the device for the address.



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