Re: [IEEE802.15.4][6LoWPAN] draft for fragmentation support

Le jeudi 20 octobre 2011 à 17:13 +0400, Dmitry Eremin-Solenikov a
écrit :

Hi, Alexander, colleagues,

On 10/20/2011 04:50 PM, Alexander Smirnov wrote:

quoted

Hi Eric,

thank you for the replies. And another question I forgot to ask:

when I send fragments, I still have original skb buffer. What should I
do with it, is there any
"proper/good" ways to drop it? Because I've already fragmented it and
do not need to send
original skb to queue.

You might want to check the TCP/IP fragmentation code path. I think you 
can drop it with kfree_skb, but I ain't sure ATM.

In the TCP/IP frag code path, we own the skb and can do many things,
like using the skb to store one of the fragment.

In a driver ndo_start_xmit(), things are a bit different.

Special care must be taken if skb_cloned(skb) is true...