netdev - Does rtnl_lock inhibit incoming traffic?

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Message-ID: <51A6522D.2000008@hartkopp.net>
Date:	Wed, 29 May 2013 21:08:29 +0200
From:	Oliver Hartkopp <socketcan@...tkopp.net>
To:	Linux Netdev List <netdev@...r.kernel.org>
Subject: Does rtnl_lock inhibit incoming traffic?

Hello,

AFAIK the rtnl_lock is used (at least) to protect the configuration of
netdevices and routing tables.

Is the reception of incoming traffic inhibited while the rtnl_lock is set, or
would i need to protect the data structures to be modified with an additional
spinlock_bh() / write_lock_bh()?

Like this one here:

http://lxr.linux.no/#linux+v3.9.4/net/ipv6/ip6mr.c#L1573

Regards,
Oliver

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