netdev - Re: [PATCH v3 net] Fixed updating of ethertype in function skb_mpls

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Date:   Mon, 2 Dec 2019 11:00:53 -0800
From:   Pravin Shelar <pshelar@....org>
To:     Martin Varghese <martinvarghesenokia@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        "Varghese, Martin (Nokia - IN/Bangalore)" <martin.varghese@...ia.com>
Subject: Re: [PATCH v3 net] Fixed updating of ethertype in function skb_mpls_pop

On Sun, Dec 1, 2019 at 9:20 PM Martin Varghese
<martinvarghesenokia@...il.com> wrote:
>
> From: Martin Varghese <martin.varghese@...ia.com>
>
> The skb_mpls_pop was not updating ethertype of an ethernet packet if the
> packet was originally received from a non ARPHRD_ETHER device.
>
> In the below OVS data path flow, since the device corresponding to port 7
> is an l3 device (ARPHRD_NONE) the skb_mpls_pop function does not update
> the ethertype of the packet even though the previous push_eth action had
> added an ethernet header to the packet.
>
> recirc_id(0),in_port(7),eth_type(0x8847),
> mpls(label=12/0xfffff,tc=0/0,ttl=0/0x0,bos=1/1),
> actions:push_eth(src=00:00:00:00:00:00,dst=00:00:00:00:00:00),
> pop_mpls(eth_type=0x800),4
>
> Fixes: ed246cee09b9 ("net: core: move pop MPLS functionality from OvS to core helper")
> Signed-off-by: Martin Varghese <martin.varghese@...ia.com>
> ---
> Changes in v2:
>     - In function skb_mpls_pop check for dev type removed
>       while updating ethertype.
>     - key->mac_proto is checked in function pop_mpls to pass
>       ethernet flag to skb_mpls_pop.
>     - dev type is checked in function tcf_mpls_act to pass
>       ethernet flag to skb_mpls_pop.
>
> Changes in v3:
>     - Fixed header inclusion order.
>     - Removed unwanted braces.
>     - Retain space between function argements and description in the
>       coments of function skb_mpls_pop.
>     - used ovs_key_mac_proto(key) to check if the packet is ethernet.
>     - Added fixes tag.
>
Acked-by: Pravin B Shelar <pshelar@....org>