netdev - ipv6 udp early demux breaks udp_l3mdev

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Date:   Fri, 14 Apr 2017 16:23:22 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     subashab@...eaurora.org
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Robert Shearman <rshearma@...cade.com>
Subject: ipv6 udp early demux breaks udp_l3mdev_accept=0

Subash:

My understanding of early demux is that it should only match connected
sockets (src/sport + dst/dport are all set). The ipv6 udp early demux
code added in 5425077d73e0c is doing a generic socket lookup which does
not require an exact match and accordingly breaks udp_l3mdev_accept=0.
Please fix.

David