Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex

From: David Ahern <hidden>
Date: 2020-10-07 16:35:44
Also in: bpf
Reply to: Maciej Żenczykowski, 2020-10-07

On 10/6/20 6:24 PM, Maciej Żenczykowski wrote:

FYI: It would be nice to have a similar function to return a device's
L2 header size (ie. 14 for ethernet) and/or hwtype.

Why does that need to be looked up via a helper? It's a static number
for a device and can plumbed to a program in a number of ways.

Jesper Dangaard Brouer · 2020-10-06
[PATCH bpf-next V1 1/6] bpf: Remove MTU check in __bpf_skb_max_len · Jesper Dangaard Brouer · 2020-10-06
[PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Jesper Dangaard Brouer · 2020-10-06
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Jesper Dangaard Brouer · 2020-10-06
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Jakub Kicinski · 2020-10-07
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Maciej Żenczykowski · 2020-10-07
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Jesper Dangaard Brouer · 2020-10-07
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · David Ahern · 2020-10-07
Re: [PATCH bpf-next V1 3/6] bpf: add BPF-helper for reading MTU from net_device via ifindex · Maciej Żenczykowski · 2020-10-07
[PATCH bpf-next V1 2/6] bpf: bpf_fib_lookup return MTU value as output when looked up · Jesper Dangaard Brouer · 2020-10-06
Re: [PATCH bpf-next V1 2/6] bpf: bpf_fib_lookup return MTU value as output when looked up · Maciej Żenczykowski · 2020-10-07
Re: [PATCH bpf-next V1 2/6] bpf: bpf_fib_lookup return MTU value as output when looked up · Jesper Dangaard Brouer · 2020-10-07
Re: [PATCH bpf-next V1 2/6] bpf: bpf_fib_lookup return MTU value as output when looked up · David Ahern · 2020-10-07
Re: [PATCH bpf-next V1 2/6] bpf: bpf_fib_lookup return MTU value as output when looked up · kernel test robot · 2020-10-07
[PATCH bpf-next V1 4/6] bpf: make it possible to identify BPF redirected SKBs · Jesper Dangaard Brouer · 2020-10-06
[PATCH bpf-next V1 5/6] bpf: Add MTU check for TC-BPF packets after egress hook · Jesper Dangaard Brouer · 2020-10-06
Re: [PATCH bpf-next V1 5/6] bpf: Add MTU check for TC-BPF packets after egress hook · kernel test robot · 2020-10-06
Re: [PATCH bpf-next V1 5/6] bpf: Add MTU check for TC-BPF packets after egress hook · kernel test robot · 2020-10-07
[PATCH bpf-next V1 6/6] bpf: drop MTU check when doing TC-BPF redirect to ingress · Jesper Dangaard Brouer · 2020-10-06
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