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| author | Wei-Chun Chao <weichunc@plumgrid.com> | 2013-12-26 21:10:22 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-15 23:31:37 (GMT) |
| commit | b21d217ce4403082908511d0296ee854f30a8014 (patch) | |
| tree | eb0877f4483b0a03b9c6644967a07dcc8712df0e /init/version.c | |
| parent | effb6d243d4da7ab063e6c0668a4f6e23cb5adb9 (diff) | |
| download | linux-fsl-qoriq-b21d217ce4403082908511d0296ee854f30a8014.tar.xz | |
ipv4: fix tunneled VM traffic over hw VXLAN/GRE GSO NIC
[ Upstream commit 7a7ffbabf99445704be01bff5d7e360da908cf8e ]
VM to VM GSO traffic is broken if it goes through VXLAN or GRE
tunnel and the physical NIC on the host supports hardware VXLAN/GRE
GSO offload (e.g. bnx2x and next-gen mlx4).
Two issues -
(VXLAN) VM traffic has SKB_GSO_DODGY and SKB_GSO_UDP_TUNNEL with
SKB_GSO_TCP/UDP set depending on the inner protocol. GSO header
integrity check fails in udp4_ufo_fragment if inner protocol is
TCP. Also gso_segs is calculated incorrectly using skb->len that
includes tunnel header. Fix: robust check should only be applied
to the inner packet.
(VXLAN & GRE) Once GSO header integrity check passes, NULL segs
is returned and the original skb is sent to hardware. However the
tunnel header is already pulled. Fix: tunnel header needs to be
restored so that hardware can perform GSO properly on the original
packet.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'init/version.c')
0 files changed, 0 insertions, 0 deletions