netdev - Re: [PATCH bpf-next v4 5/7] samples/bpf: Add a "force" flag to XDP samples

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Date:   Mon, 28 Jan 2019 12:57:22 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Maciej Fijalkowski <maciejromanfijalkowski@...il.com>,
        daniel@...earbox.net, ast@...nel.org
Cc:     netdev@...r.kernel.org, jakub.kicinski@...ronome.com,
        brouer@...hat.com
Subject: Re: [PATCH bpf-next v4 5/7] samples/bpf: Add a "force" flag to XDP
 samples

On 1/28/19 11:16 AM, Maciej Fijalkowski wrote:
> From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> 
> Make xdp samples consistent with iproute2 behavior and set the
> XDP_FLAGS_UPDATE_IF_NOEXIST by default when setting the xdp program on
> interface. Provide an option for user to force the program loading,
> which as a result will not include the mentioned flag in
> bpf_set_link_xdp_fd call.
> 
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> ---

Patch is fine but I don't really know if being consistent with
iproute2 here gets us much. I guess if users find the "force"
behavior better for a sample that is OK though.

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