netdev - Re: [PATCH v5 bpf-next 03/14] xdp: add xdp_shared

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Message-ID: <1b0a5b59-f7e6-78b3-93bd-2ea35274e783@mojatatu.com>
Date:   Sat, 19 Dec 2020 10:30:57 -0500
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Shay Agroskin <shayagr@...zon.com>,
        Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Cc:     Saeed Mahameed <saeed@...nel.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>, bpf@...r.kernel.org,
        netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        ast@...nel.org, daniel@...earbox.net, sameehj@...zon.com,
        john.fastabend@...il.com, dsahern@...nel.org, brouer@...hat.com,
        echaudro@...hat.com, jasowang@...hat.com
Subject: Re: [PATCH v5 bpf-next 03/14] xdp: add xdp_shared_info data structure

On 2020-12-19 9:53 a.m., Shay Agroskin wrote:
> 
> Lorenzo Bianconi <lorenzo.bianconi@...hat.com> writes:
> 

>> for the moment I do not know if this area is used for other purposes.
>> Do you think there are other use-cases for it?

Sorry to interject:
Does it make sense to use it to store arbitrary metadata or a scratchpad
in this space? Something equivalent to skb->cb which is lacking in
XDP.

cheers,
jamal