[SRU Request] tc/ebpf: unable to use BPF_FUNC_skb_change_head

[Thadeu Lima de Souza Cascardo]

On Tue, Sep 22, 2020 at 10:59:18AM +0200, Nicolas Dichtel wrote:
> Le 21/09/2020 à 19:30, Thadeu Lima de Souza Cascardo a écrit :
> > On Mon, Sep 21, 2020 at 05:49:52PM +0200, Nicolas Dichtel wrote:
> >> Hi Ubuntu kernel team,
> >>
> >> please, could you consider to backport the linux upstream commit 6f3f65d80dac
> >> ("net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head"):
> >>
> >> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f3f65d80dac
> >>
> >> It is included in v5.8 (the bug exists since v4.10).
> >>
> >> Here is the launchpad entry:
> >> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896504
> >>
> >>
> >> Thank you,
> >> Nicolas
> >>
> >> -- 
> > 
> > Hi, Nicolas.
> Hi Cascardo,
> 
> > 
> > What do you want to backport it to? What packages on what series? And could you
> > expand on the test case, that is, provide code for that? That would be really
> > helpful!
> We target the focal kernel (5.4). I've added an explicit test case in the
> launchpad entry.
> 
> 
> Thank you,
> Nicolas

Thanks, Nicolas. I'll look at it.
Cascardo.