netdev - Re: [PATCH iproute2 net-next v2] bpf: add support for generic xdp

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Message-Id: <20170428.102158.1626837672156739210.davem@davemloft.net>
Date:   Fri, 28 Apr 2017 10:21:58 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     daniel@...earbox.net
Cc:     stephen@...workplumber.org, alexei.starovoitov@...il.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH iproute2 net-next v2] bpf: add support for generic xdp

From: Daniel Borkmann <daniel@...earbox.net>
Date: Fri, 28 Apr 2017 15:44:29 +0200

> Follow-up to commit c7272ca72009 ("bpf: add initial support for
> attaching xdp progs") to also support generic XDP. This adds an
> indicator for loaded generic XDP programs when programs are loaded
> as shown in c7272ca72009, but the driver still lacks native XDP
> support.
> 
>   # ip link
>   [...]
>   3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdpgeneric qdisc [...]
>       link/ether 0c:c4:7a:03:f9:25 brd ff:ff:ff:ff:ff:ff
>   [...]
> 
> In case the driver does support native XDP, but the user wants
> to load the program as generic XDP (e.g. for testing purposes),
> then this can be done with the same semantics as in c7272ca72009,
> but with 'xdpgeneric' instead of 'xdp' command for loading:
> 
>   # ip -force link set dev eno1 xdpgeneric obj xdp.o
> 
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>

Acked-by: David S. Miller <davem@...emloft.net>