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

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Date:   Wed, 8 Mar 2023 09:28:56 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
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, 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?