netdev - [IEEE802.15.4][6LoWPAN] draft for fragmentation support

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Message-ID: <20111020111718.GA32181@avtobot.ww600.siemens.net>
Date:	Thu, 20 Oct 2011 15:17:18 +0400
From:	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
To:	davem@...emloft.net
Cc:	dbaryshkov@...il.com, slapin@...fans.org,
	linux-zigbee-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	eric.dumazet@...il.com, kernel-janitors@...r.kernel.org,
	jonsmirl@...il.com, alex.bluesman.smirnov@...il.com
Subject: [IEEE802.15.4][6LoWPAN] draft for fragmentation support

Hello everybody,

below is the patch which adds support for fragmentation in 6LoWPAN
point to point networks. This activity needs because of difference
in MTU: 1280 ipv6 and 128 ieee802.15.4

This patch is just a draft. Could anyone please look at
it and let me know your opinion.

The most doubtful moments for me are:
1. Should the list 'frag_list' and the mutex 'flist_lock' be
included into dev private data?
2. Can I use 'dev_queue_xmit' to send fragments to queue?
3. Creating new 'skb' instead of copying and modifying main one.

With best regards,
Alexander

View attachment "0001-6LoWPAN-fragmentation-support.patch" of type "text/plain" (10376 bytes)