netdev - Re: [PATCH v19 bpf-next 20/23] net: xdp: introduce bpf_xdp

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Date:   Tue, 30 Nov 2021 12:38:39 -0800
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 v19 bpf-next 20/23] net: xdp: introduce bpf_xdp_pointer
 utility routine

On Tue, 30 Nov 2021 12:53:04 +0100 Lorenzo Bianconi wrote:
> Similar to skb_header_pointer, introduce bpf_xdp_pointer utility routine
> to return a pointer to a given position in the xdp_buff if the requested
> area (offset + len) is contained in a contiguous memory area otherwise it
> will be copied in a bounce buffer provided by the caller.
> Similar to the tc counterpart, introduce the two following xdp helpers:
> - bpf_xdp_load_bytes
> - bpf_xdp_store_bytes
> 
> Reviewed-by: Eelco Chaudron <echaudro@...hat.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>

Acked-by: Jakub Kicinski <kuba@...nel.org>