ACK: [Quantal][SRU][Pull Request] Fix for LP#1201869

[Luis Henriques]

Chris J Arges <chris.j.arges at canonical.com> writes:

> Note: this is a resubmission; it has been retested for an extended
> period of time. In addition I checked upstream patches around the code
> for bugfixes.

They look fine to me.

Cheers,
-- 
Luis

>
> SRU Justification:
>
> Impact:
> Users of the 3.5/3.8 kernel will have poor network throughput when using
> OpenStack Neutron depending on their setup.
>
> Fix:
> These upstream patches are necessary to fix the issue:
>
> 2681128f0ced8aa4e66f221197e183cc16d244fe
> 8093315a91340bca52549044975d8c7f673b28a1
> d0e2c55e7c940a3ee91e9e23a2683b593690f1e9
> 2efd32ee1b60b0b31404ca47c1ce70e5a5d24ebc
> f45a5c267da35174e22cec955093a7513dc1623d
>
> Testcase:
> Setup OpenStack Neutron. Test throughput between internal and external
> nodes.
>
> The following explains an example vlan+namespace configuration:
> Internal Node: [10.x.x.2]->eth2.123->br123->tap123->qr-123[10.x.x.1]
> <--- netns: qrouter-123
> netns: qrouter-123 --->
> qg-234[10.x.y.1]->tap234->br234->eth2.234->External Node[10.x.y.2]
> Where:
> 1) tap123+qr-123 and tap234+qg-234 are veth pairs
> 2) qr-123 and qg-234 reside inside the qrouter-123 namespace
>
> --
>
> The following changes since commit 6cf308f67ee50537264b594a1c0c0b8b1fce130f:
>
>   UBUNTU: Ubuntu-3.5.0-40.61 (2013-08-21 13:48:04 -0700)
>
> are available in the git repository at:
>
>   git://kernel.ubuntu.com/arges/ubuntu-quantal.git lp1201869
>
> for you to fetch changes up to 3c57730b63fae6bb82a66d18715f184ef3cf6b5b:
>
>   veth: fix NULL dereference in veth_dellink() (2013-08-21 16:40:14 -0500)
>
> ----------------------------------------------------------------
> Eric Dumazet (5):
>       veth: reduce stat overhead
>       veth: extend device features
>       veth: avoid a NULL deref in veth_stats_one
>       veth: fix a NULL deref in netif_carrier_off
>       veth: fix NULL dereference in veth_dellink()
>
>  drivers/net/veth.c        |  177
> ++++++++++++++++++++++++---------------------
>  include/linux/netdevice.h |    1 +
>  2 files changed, 94 insertions(+), 84 deletions(-)