gro: Make GRO aware of lightweight tunnels.
authorJesse Gross <jesse@kernel.org>
Thu, 21 Jan 2016 01:59:49 +0000 (17:59 -0800)
committerDavid S. Miller <davem@davemloft.net>
Thu, 21 Jan 2016 02:48:38 +0000 (18:48 -0800)
commitce87fc6ce3f9f4488546187e3757cf666d9d4a2a
tree02d13d67cc1113935a5a3b738a51bb70c8b20cad
parent5f2f3cad8b878b23f17a11dd5af4f4a2cc41c797
gro: Make GRO aware of lightweight tunnels.

GRO is currently not aware of tunnel metadata generated by lightweight
tunnels and stored in the dst. This leads to two possible problems:
 * Incorrectly merging two frames that have different metadata.
 * Leaking of allocated metadata from merged frames.

This avoids those problems by comparing the tunnel information before
merging, similar to how we handle other metadata (such as vlan tags),
and releasing any state when we are done.

Reported-by: John <john.phillips5@hpe.com>
Fixes: 2e15ea39 ("ip_gre: Add support to collect tunnel metadata.")
Signed-off-by: Jesse Gross <jesse@kernel.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/dst_metadata.h
net/core/dev.c