netdev - Re: [PATCH v2.41 5/5] datapath: Add basic MPLS support to kernel

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Message-ID: <CALnjE+qOwkY0NJ=LbT0SgZFmnzvqRHcTS35xWVfMyPtjj4r0ZA@mail.gmail.com>
Date:	Wed, 2 Oct 2013 11:03:57 -0700
From:	Pravin Shelar <pshelar@...ira.com>
To:	Simon Horman <horms@...ge.net.au>
Cc:	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	netdev <netdev@...r.kernel.org>, Jesse Gross <jesse@...ira.com>,
	Ben Pfaff <blp@...ira.com>, Ravi K <rkerur@...il.com>,
	Isaku Yamahata <yamahata@...inux.co.jp>,
	Joe Stringer <joe@...d.net.nz>
Subject: Re: [PATCH v2.41 5/5] datapath: Add basic MPLS support to kernel

On Mon, Sep 30, 2013 at 11:47 PM, Simon Horman <horms@...ge.net.au> wrote:
> Allow datapath to recognize and extract MPLS labels into flow keys
> and execute actions which push, pop, and set labels on packets.
>
> Based heavily on work by Leo Alterman, Ravi K, Isaku Yamahata and Joe Stringer.
>
> Cc: Ravi K <rkerur@...il.com>
> Cc: Leo Alterman <lalterman@...ira.com>
> Cc: Isaku Yamahata <yamahata@...inux.co.jp>
> Cc: Joe Stringer <joe@...d.net.nz>
> Signed-off-by: Simon Horman <horms@...ge.net.au>
>
> ---
>
> +
> +       /* this hack needed to get regular skb_gso_segment() */
> +#ifdef HAVE___SKB_GSO_SEGMENT
> +#undef __skb_gso_segment
> +       skb_gso = __skb_gso_segment(skb, features, tx_path);
> +#else
> +#undef skb_gso_segment
> +       skb_gso = skb_gso_segment(skb, features);
> +#endif
> +

We can get rid of #ifdefs by just using different name for
rpl___skb_gso_segment(), something like mpls_vlan_skb_gso_segment().
The way it is done for tnl-gso.
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