Re: [PATCH net v3 2/3] ipv6: ignore dst hint for multipath routes

David Ahern
2023-08-28T18:56:14Z

On 8/28/23 5:32 AM, Sriram Yagnaraman wrote:
> Route hints when the nexthop is part of a multipath group causes packets
> in the same receive batch to be sent to the same nexthop irrespective of
> the multipath hash of the packet. So, do not extract route hint for
> packets whose destination is part of a multipath group.
>
> A new SKB flag IP6SKB_MULTIPATH is introduced for this purpose, set the
> flag when route is looked up in fib6_select_path() and use it in
> ip6_can_use_hint() to check for the existence of the flag.
>
> Fixes: 197dbf24e360 ("ipv6: introduce and uses route look hints for list input.")
> Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
> ---
> include/linux/ipv6.h | 1 +
> net/ipv6/ip6_input.c | 3 ++-
> net/ipv6/route.c | 3 +++
> 3 files changed, 6 insertions(+), 1 deletion(-)
>

Reviewed-by: David Ahern <dsahern@kernel.org>