netdev - Re: [PATCH v15 bpf-next 00/18] mvneta: introduce XDP multi-buffer support

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Message-ID: <20211008181435.742e1e44@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 8 Oct 2021 18:14:35 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        lorenzo.bianconi@...hat.com, davem@...emloft.net, ast@...nel.org,
        daniel@...earbox.net, shayagr@...zon.com, john.fastabend@...il.com,
        dsahern@...nel.org, brouer@...hat.com, echaudro@...hat.com,
        jasowang@...hat.com, alexander.duyck@...il.com, saeed@...nel.org,
        maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
        tirthendu.sarkar@...el.com, toke@...hat.com
Subject: Re: [PATCH v15 bpf-next 00/18] mvneta: introduce XDP multi-buffer
 support

On Fri,  8 Oct 2021 14:49:38 +0200 Lorenzo Bianconi wrote:
> Changes since v14:
> - intrudce bpf_xdp_pointer utility routine and
>   bpf_xdp_load_bytes/bpf_xdp_store_bytes helpers
> - drop bpf_xdp_adjust_data helper
> - drop xdp_frags_truesize in skb_shared_info
> - explode bpf_xdp_mb_adjust_tail in bpf_xdp_mb_increase_tail and
>   bpf_xdp_mb_shrink_tail

I thought the conclusion of the discussion regarding backward
compatibility was that we should require different program type
or other explicit opt in. Did I misinterpret?