diff options
| author | Wei-Chun Chao <weichunc@plumgrid.com> | 2013-12-26 13:10:22 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-15 15:31:37 -0800 |
| commit | b21d217ce4403082908511d0296ee854f30a8014 (patch) | |
| tree | eb0877f4483b0a03b9c6644967a07dcc8712df0e /include | |
| parent | effb6d243d4da7ab063e6c0668a4f6e23cb5adb9 (diff) | |
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 'include')
| -rw-r--r-- | include/linux/netdevice.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c8d3375d5f5f..21eae43348fb 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2954,6 +2954,19 @@ static inline void netif_set_gso_max_size(struct net_device *dev, dev->gso_max_size = size; } +static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, + int pulled_hlen, u16 mac_offset, + int mac_len) +{ + skb->protocol = protocol; + skb->encapsulation = 1; + skb_push(skb, pulled_hlen); + skb_reset_transport_header(skb); + skb->mac_header = mac_offset; + skb->network_header = skb->mac_header + mac_len; + skb->mac_len = mac_len; +} + static inline bool netif_is_bond_master(struct net_device *dev) { return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; |