netdev - RE: [PATCHv17 bpf-next 2/6] bpf: add a new bpf argument type ARG_CONST_MAP_PTR_OR

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Date:   Wed, 27 Jan 2021 13:50:27 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Hangbin Liu <liuhangbin@...il.com>, bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Jiri Benc <jbenc@...hat.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Eelco Chaudron <echaudro@...hat.com>, ast@...nel.org,
        Daniel Borkmann <daniel@...earbox.net>,
        Lorenzo Bianconi <lorenzo.bianconi@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: RE: [PATCHv17 bpf-next 2/6] bpf: add a new bpf argument type
 ARG_CONST_MAP_PTR_OR_NULL

Hangbin Liu wrote:
> Add a new bpf argument type ARG_CONST_MAP_PTR_OR_NULL which could be
> used when we want to allow NULL pointer for map parameter. The bpf helper
> need to take care and check if the map is NULL when use this type.
> 
> Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
> 
> ---
> v13-v17: no update
> v11-v12: rebase the patch to latest bpf-next
> v10: remove useless CONST_PTR_TO_MAP_OR_NULL and Copy-paste comment.
> v9: merge the patch from [1] in to this series.
> v1-v8: no this patch
> 
> [1] https://lore.kernel.org/bpf/20200715070001.2048207-1-liuhangbin@gmail.com/
> ---

LGTM

Acked-by: John Fastabend <john.fastabend@...il.com>