Re: [PATCH net-next v2 0/7] net: ip: add drop reasons to input route

[Paolo Abeni]

On 10/7/24 09:46, Menglong Dong wrote:
> In this series, we mainly add some skb drop reasons to the input path of
> ip routing.
>
> The errno from fib_validate_source() is -EINVAL or -EXDEV, and -EXDEV is
> used in ip_rcv_finish_core() to increase the LINUX_MIB_IPRPFILTER. For
> this case, we can check it by
> "drop_reason == SKB_DROP_REASON_IP_RPFILTER" instead. Therefore, we can
> make fib_validate_source() return -reason.
>
> Meanwhile, we make the following functions return drop reasons too:
>
>    ip_route_input_mc()
>    ip_mc_validate_source()
>    ip_route_input_slow()
>    ip_route_input_rcu()
>    ip_route_input_noref()
>    ip_route_input()

A few other functions are excluded, so that the ip input path coverage 
is not completed - i.e. ip_route_use_hint(), is that intentional?

In any case does not apply cleanly anymore.

Please answer to the above question and question on patch 1 before 
submitting a new revision. At very least the new revision should include 
a comment explaining the reasoning for the current choice.

Please, include in each patch the detailed changelog after the '---' 
separator.

Thanks,

Paolo