netdev - Re: [PATCH v13 bpf-next 00/10] Add skb + xdp dynptrs

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Date:   Wed, 8 Mar 2023 11:02:24 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Joanne Koong <joannelkoong@...il.com>, bpf@...r.kernel.org,
        martin.lau@...nel.org, andrii@...nel.org, ast@...nel.org,
        memxor@...il.com, daniel@...earbox.net, netdev@...r.kernel.org,
        toke@...nel.org
Subject: Re: [PATCH v13 bpf-next 00/10] Add skb + xdp dynptrs

On Wed, Mar 8, 2023 at 9:28 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 8 Mar 2023 09:08:09 -0800 Andrii Nakryiko wrote:
> > On Wed, Mar 8, 2023 at 12:16 AM Jakub Kicinski <kuba@...nel.org> wrote:
> > > On Wed,  1 Mar 2023 07:49:43 -0800 Joanne Koong wrote:
> > > > This patchset is the 2nd in the dynptr series. The 1st can be found here [0].
> > > >
> > > > This patchset adds skb and xdp type dynptrs, which have two main benefits for
> > > > packet parsing:
> > > >     * allowing operations on sizes that are not statically known at
> > > >       compile-time (eg variable-sized accesses).
> > > >     * more ergonomic and less brittle iteration through data (eg does not need
> > > >       manual if checking for being within bounds of data_end)
> > > >
> > > > When comparing the differences in runtime for packet parsing without dynptrs
> > > > vs. with dynptrs, there is no noticeable difference. Patch 9 contains more
> > > > details as well as examples of how to use skb and xdp dynptrs.
> > >
> > > Oddly I see an error trying to build net-next with clang 15.0.7,
> > > but I'm 90% sure that it built yesterday, has anyone seen:
> >
> > yep, it was fixed in bpf-next:
> >
> > 2d5bcdcda879 ("bpf: Increase size of BTF_ID_LIST without
> > CONFIG_DEBUG_INFO_BTF again")
>
> Perfect, thanks! Could you get that to us ASAP, please?

yep, will send PR soon