From: Jakub Kicinski <kuba@kernel.org>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
Daniel Borkmann <borkmann@iogearbox.net>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
John Fastabend <john.fastabend@gmail.com>
Subject: Re: [PATCH bpf-next] bpf: don't check against device MTU in __bpf_skb_max_len
Date: Fri, 4 Sep 2020 16:39:47 -0700 [thread overview]
Message-ID: <20200904163947.20839d7e@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> (raw)
In-Reply-To: <159921182827.1260200.9699352760916903781.stgit@firesoul>
On Fri, 04 Sep 2020 11:30:28 +0200 Jesper Dangaard Brouer wrote:
> @@ -3211,8 +3211,7 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 off, u32 len_diff,
>
> static u32 __bpf_skb_max_len(const struct sk_buff *skb)
> {
> - return skb->dev ? skb->dev->mtu + skb->dev->hard_header_len :
> - SKB_MAX_ALLOC;
> + return SKB_MAX_ALLOC;
> }
>
> BPF_CALL_4(bpf_skb_adjust_room, struct sk_buff *, skb, s32, len_diff,
>
Looks familiar:
https://lore.kernel.org/netdev/20200420231427.63894-1-zenczykowski@gmail.com/
next prev parent reply other threads:[~2020-09-04 23:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 9:30 [PATCH bpf-next] bpf: don't check against device MTU in __bpf_skb_max_len Jesper Dangaard Brouer
2020-09-04 23:39 ` Jakub Kicinski [this message]
2020-09-07 14:07 ` Jesper Dangaard Brouer
2020-09-10 20:00 ` Maciej Żenczykowski
2020-09-14 14:05 ` Jesper Dangaard Brouer
2020-09-14 20:50 ` Maciej Żenczykowski
2020-09-15 8:47 ` Toke Høiland-Jørgensen
2020-09-16 0:12 ` Maciej Żenczykowski
2020-09-16 11:37 ` Toke Høiland-Jørgensen
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