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From: David Ahern <dsahern@gmail.com>
To: John Fastabend <john.fastabend@gmail.com>,
	Lorenzo Bianconi <lorenzo@kernel.org>,
	bpf@vger.kernel.org, netdev@vger.kernel.org
Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net,
	kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net,
	shayagr@amazon.com, sameehj@amazon.com, dsahern@kernel.org,
	brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com,
	alexander.duyck@gmail.com, saeed@kernel.org,
	maciej.fijalkowski@intel.com, magnus.karlsson@intel.com,
	tirthendu.sarkar@intel.com
Subject: Re: [PATCH v9 bpf-next 00/14] mvneta: introduce XDP multi-buffer support
Date: Tue, 22 Jun 2021 21:41:41 -0600	[thread overview]
Message-ID: <efe4fcfa-087b-e025-a371-269ef36a3e86@gmail.com> (raw)
In-Reply-To: <60d26fcdbd5c7_1342e208f6@john-XPS-13-9370.notmuch>

On 6/22/21 5:18 PM, John Fastabend wrote:
> At this point I don't think we can have a partial implementation. At
> the moment we have packet capture applications and protocol parsers
> running in production. If we allow this to go in staged we are going
> to break those applications that make the fundamental assumption they
> have access to all the data in the packet.

What about cases like netgpu where headers are accessible but data is
not (e.g., gpu memory)? If the API indicates limited buffer access, is
that sufficient?

  reply	other threads:[~2021-06-23  3:41 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-14 12:49 [PATCH v9 bpf-next 00/14] mvneta: introduce XDP multi-buffer support Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 01/14] net: skbuff: add data_len field to skb_shared_info Lorenzo Bianconi
2021-06-28 19:58   ` Alexander Duyck
2021-06-29 12:44     ` Lorenzo Bianconi
2021-06-29 17:08       ` Jakub Kicinski
2021-06-29 18:18         ` Alexander Duyck
2021-06-29 18:37           ` Jakub Kicinski
2021-06-29 19:11             ` Jesper Dangaard Brouer
2021-06-29 19:18               ` Lorenzo Bianconi
2021-06-29 20:45                 ` Alexander Duyck
2021-06-14 12:49 ` [PATCH v9 bpf-next 02/14] xdp: introduce flags field in xdp_buff/xdp_frame Lorenzo Bianconi
2021-06-28 20:14   ` Alexander Duyck
2021-06-29 12:43     ` Lorenzo Bianconi
2021-06-29 13:07       ` Alexander Duyck
2021-06-29 13:25         ` Lorenzo Bianconi
2021-07-05 15:52         ` Lorenzo Bianconi
2021-07-05 21:35           ` Alexander Duyck
2021-07-06 11:53             ` Lorenzo Bianconi
2021-07-06 14:04               ` Alexander Duyck
2021-07-06 17:47                 ` Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 03/14] net: mvneta: update mb bit before passing the xdp buffer to eBPF layer Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 04/14] xdp: add multi-buff support to xdp_return_{buff/frame} Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 05/14] net: mvneta: add multi buffer support to XDP_TX Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 06/14] net: mvneta: enable jumbo frames for XDP Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 07/14] net: xdp: add multi-buff support to xdp_build_skb_from_frame Lorenzo Bianconi
2021-06-28 21:05   ` Alexander Duyck
2021-06-29 18:34     ` Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 08/14] bpf: add multi-buff support to the bpf_xdp_adjust_tail() API Lorenzo Bianconi
2021-06-22 23:37   ` John Fastabend
2021-06-24  9:26     ` Eelco Chaudron
2021-06-24 14:24       ` John Fastabend
2021-06-24 15:16         ` Zvi Effron
2021-06-29 13:19         ` Lorenzo Bianconi
2021-06-29 13:27           ` Toke Høiland-Jørgensen
2021-07-06 21:44         ` Backwards compatibility for XDP multi-buff (was: Re: [PATCH v9 bpf-next 08/14] bpf: add multi-buff support to the bpf_xdp_adjust_tail() API) Toke Høiland-Jørgensen
2021-06-14 12:49 ` [PATCH v9 bpf-next 09/14] bpf: introduce bpf_xdp_get_buff_len helper Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 10/14] bpf: add multi-buffer support to xdp copy helpers Lorenzo Bianconi
2021-06-22 23:49   ` John Fastabend
2021-06-24  9:42     ` Eelco Chaudron
2021-06-24 14:28       ` John Fastabend
2021-06-25  8:25         ` Eelco Chaudron
2021-06-29 13:23         ` Lorenzo Bianconi
2021-07-06 10:15         ` Eelco Chaudron
2021-06-14 12:49 ` [PATCH v9 bpf-next 11/14] bpf: move user_size out of bpf_test_init Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 12/14] bpf: introduce multibuff support to bpf_prog_test_run_xdp() Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 13/14] bpf: test_run: add xdp_shared_info pointer in bpf_test_finish signature Lorenzo Bianconi
2021-06-14 12:49 ` [PATCH v9 bpf-next 14/14] bpf: update xdp_adjust_tail selftest to include multi-buffer Lorenzo Bianconi
2021-06-22 23:18 ` [PATCH v9 bpf-next 00/14] mvneta: introduce XDP multi-buffer support John Fastabend
2021-06-23  3:41   ` David Ahern [this message]
2021-06-23  5:48     ` John Fastabend
2021-06-23 14:40       ` David Ahern
2021-06-24 14:22         ` John Fastabend
2021-07-01  7:56   ` Magnus Karlsson

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