netdev - special handling before ndo_start

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Message-ID: <201107271848349537853@gmail.com>
Date:	Wed, 27 Jul 2011 18:48:37 +0800
From:	"jiangtao.jit" <jiangtao.jit@...il.com>
To:	"netdev" <netdev@...r.kernel.org>
Cc:	"jiangtao.jit" <jiangtao.jit@...il.com>
Subject: special handling before ndo_start_xmit() been invoked

Hi all:

in struct net_device
there is a function pointer    rx_handler_func_t __rcu	*rx_handler
it's very convenient to register a function in an externel module
and do some special handlings

so i think what about to add an tx_handler_func
before        ndo_start_xmit() been invoked
and do some special things before transmit

is it necessary or there is already some other better methods to achieve this goal ?
Thank you all

-------
2011-07-27 
jiangtao.jit 

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