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From: David Ahern <dsahern@gmail.com>
To: Jason Wang <jasowang@redhat.com>,
	Jesper Dangaard Brouer <jbrouer@redhat.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	ast@kernel.org, daniel@iogearbox.net, mst@redhat.com
Subject: Re: [RFC PATCH net-next V2 0/6] XDP rx handler
Date: Fri, 17 Aug 2018 15:15:01 -0600	[thread overview]
Message-ID: <ae0e09a1-a20a-a2fc-36a0-82e109216bf4@gmail.com> (raw)
In-Reply-To: <2792239a-ed3b-d66e-0c1c-e99455311eff@redhat.com>

On 8/15/18 9:34 PM, Jason Wang wrote:
> I may miss something but BPF forbids loop. Without a loop how can we
> make sure all stacked devices is enumerated correctly without knowing
> the topology in advance?

netdev_for_each_upper_dev_rcu

BPF helpers allow programs to do lookups in kernel tables, in this case
the ability to find an upper device that would receive the packet.

  parent reply	other threads:[~2018-08-17 21:15 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-13  3:17 [RFC PATCH net-next V2 0/6] XDP rx handler Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 1/6] net: core: factor out generic XDP check and process routine Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 2/6] net: core: generic XDP support for stacked device Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 3/6] net: core: introduce XDP rx handler Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 4/6] macvlan: count the number of vlan in source mode Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 5/6] macvlan: basic XDP support Jason Wang
2018-08-13  3:17 ` [RFC PATCH net-next V2 6/6] virtio-net: support XDP rx handler Jason Wang
2018-08-14  9:22   ` Jesper Dangaard Brouer
2018-08-14 13:01     ` Jason Wang
2018-08-14  0:32 ` [RFC PATCH net-next V2 0/6] " Alexei Starovoitov
2018-08-14  7:59   ` Jason Wang
2018-08-14 10:17     ` Jesper Dangaard Brouer
2018-08-14 13:20       ` Jason Wang
2018-08-14 14:03         ` David Ahern
2018-08-15  0:29           ` Jason Wang
2018-08-15  5:35             ` Alexei Starovoitov
2018-08-15  7:04               ` Jason Wang
2018-08-16  2:49                 ` Alexei Starovoitov
2018-08-16  4:21                   ` Jason Wang
2018-08-15 17:17             ` David Ahern
2018-08-15 17:17               ` David Ahern
2018-08-16  3:34               ` Jason Wang
2018-08-16  4:05                 ` Alexei Starovoitov
2018-08-16  4:24                   ` Jason Wang
2018-08-17 21:15                 ` David Ahern [this message]
2018-08-20  6:34                   ` Jason Wang
2018-09-05 17:20                     ` David Ahern
2018-09-06  5:12                       ` Jason Wang

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