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Date: Fri, 7 Aug 2020 17:30:16 +0900 From: Yoshiki Komachi <komachi.yoshiki@...il.com> To: David Ahern <dsahern@...il.com>, John Fastabend <john.fastabend@...il.com> Cc: "David S. Miller" <davem@...emloft.net>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, Jakub Kicinski <kuba@...nel.org>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>, KP Singh <kpsingh@...omium.org>, Roopa Prabhu <roopa@...ulusnetworks.com>, Nikolay Aleksandrov <nikolay@...ulusnetworks.com>, David Ahern <dsahern@...nel.org>, Networking <netdev@...r.kernel.org>, bridge@...ts.linux-foundation.org, bpf <bpf@...r.kernel.org> Subject: Re: [RFC PATCH bpf-next 0/3] Add a new bpf helper for FDB lookup > 2020/08/06 1:36、David Ahern <dsahern@...il.com>のメール: > > On 8/5/20 4:26 AM, Yoshiki Komachi wrote: >>> >>> Just to clarify for myself. I expect that with just the helpers here >>> we should only expect static configurations to work, e.g. any learning >>> and/or aging is not likely to work if we do redirects in the XDP path. >> >> As you described above, learning and aging don’t work at this point. >> >> IMO, another helper for learning will be required to fill the requirements. >> I guess that the helper will enable us to use the aging feature as well >> because the aging is the functionality of bridge fdb. > > One option is to have a flag that bumps the ageing on successful lookup > and do that in 1 call. You will already have access to the fdb entry. It seems like a good idea to me! I guess that the flags in my suggested bpf helper for the FDB lookup will be useful for such a case. Thanks & Best regards, — Yoshiki Komachi komachi.yoshiki@...il.com
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