netdev - Re: [PATCH bpf-next v2 09/13] bpf: add bpf_skb_adjust

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Date:   Fri, 22 Mar 2019 12:31:46 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alan Maguire <alan.maguire@...cle.com>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH bpf-next v2 09/13] bpf: add bpf_skb_adjust_room encap flags

On Fri, Mar 22, 2019 at 12:11 PM Alexei Starovoitov
<alexei.starovoitov@...il.com> wrote:
>
> On Fri, Mar 22, 2019 at 8:48 AM Willem de Bruijn
> <willemdebruijn.kernel@...il.com> wrote:
> >
> > On Fri, Mar 22, 2019 at 11:44 AM Alexei Starovoitov
> > <alexei.starovoitov@...il.com> wrote:
> > >
> > > On Fri, Mar 22, 2019 at 8:15 AM Willem de Bruijn
> > > <willemdebruijn.kernel@...il.com> wrote:
> > > >
> > > > +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV4   (1ULL << 1)
> > > > +#define BPF_F_ADJ_ROOM_ENCAP_L3_IPV6   (1ULL << 2)
> > > > +#define BPF_F_ADJ_ROOM_ENCAP_L3_MASK   (BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 | \
> > > > +                                        BPF_F_ADJ_ROOM_ENCAP_L3_IPV6)
> > >
> > > mask is still in uapi...
> >
> > That's only the L3 MASK, which captures ipv4 or ipv6. I don't see that
> > being expanded.
>
> and what's the use of it for user space?

I see. Indeed, it has none there. Will remove. Apologies for the extra
round of revision as a result of this.