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Message-ID: <cf3903b0-9258-d000-c8b4-1f196ea726c5@linux.dev> Date: Tue, 30 May 2023 10:22:11 -0700 From: Martin KaFai Lau <martin.lau@...ux.dev> To: Tariq Toukan <ttoukan.linux@...il.com> Cc: brouer@...hat.com, Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, bpf@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org, Gal Pressman <gal@...dia.com>, Nimrod Oren <noren@...dia.com>, Tariq Toukan <tariqt@...dia.com>, Lorenzo Bianconi <lorenzo.bianconi@...hat.com>, drosen@...gle.com, Joanne Koong <joannelkoong@...il.com>, henning.fehrmann@....mpg.de, oliver.behnke@....mpg.de, Jesper Dangaard Brouer <jbrouer@...hat.com>, Alexei Starovoitov <ast@...nel.org>, John Fastabend <john.fastabend@...il.com>, Jakub Kicinski <kuba@...nel.org> Subject: Re: [PATCH bpf-next 1/2] samples/bpf: fixup xdp_redirect tool to be able to support xdp multibuffer On 5/30/23 6:40 AM, Tariq Toukan wrote: >>> I initiated a discussion on this topic a few months ago. dynptr was accepted >>> since then, but I'm not aware of any in-progress followup work that addresses >>> this. >>> >> >> Are you saying some more work is needed on dynptr? >> > > AFAIU yes. > But I might be wrong... I need to revisit this. > Do you think/know that dynptr can be used immediately? Not sure if you are aware of the bpf_dynptr_slice[_rdwr]() which could be useful here. It only does a copy when the requested slice is across different frags: https://lore.kernel.org/all/20230301154953.641654-10-joannelkoong@gmail.com/
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