diff options
| author | Sriharsha Basavapatna <sriharsha.basavapatna@emulex.com> | 2015-01-15 16:08:43 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-01-15 01:55:05 -0500 |
| commit | 16dde0d6ac159531a5e03cd3f8bc8a401d9f3fb6 (patch) | |
| tree | 5f71beea0b4386379b339bd72d4203d76f4b34d0 /drivers/net/ethernet/emulex | |
| parent | a6391a924cf5a16761ccd6b45094a7d5b9aeebac (diff) | |
be2net: Allow GRE to work concurrently while a VxLAN tunnel is configured
Other tunnels like GRE break while VxLAN offloads are enabled in Skyhawk-R. To
avoid this, we should restrict offload features on a per-packet basis in such
conditions.
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/emulex')
| -rw-r--r-- | drivers/net/ethernet/emulex/benet/be_main.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index 41a0a5498da..d48806b5cd8 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -4383,8 +4383,9 @@ static int be_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, * distinguish various types of transports (VxLAN, GRE, NVGRE ..). So, offload * is expected to work across all types of IP tunnels once exported. Skyhawk * supports offloads for either VxLAN or NVGRE, exclusively. So we export VxLAN - * offloads in hw_enc_features only when a VxLAN port is added. Note this only - * ensures that other tunnels work fine while VxLAN offloads are not enabled. + * offloads in hw_enc_features only when a VxLAN port is added. If other (non + * VxLAN) tunnels are configured while VxLAN offloads are enabled, offloads for + * those other tunnels are unexported on the fly through ndo_features_check(). * * Skyhawk supports VxLAN offloads only for one UDP dport. So, if the stack * adds more than one port, disable offloads and don't re-enable them again @@ -4463,7 +4464,41 @@ static netdev_features_t be_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { - return vxlan_features_check(skb, features); + struct be_adapter *adapter = netdev_priv(dev); + u8 l4_hdr = 0; + + /* The code below restricts offload features for some tunneled packets. + * Offload features for normal (non tunnel) packets are unchanged. + */ + if (!skb->encapsulation || + !(adapter->flags & BE_FLAGS_VXLAN_OFFLOADS)) + return features; + + /* It's an encapsulated packet and VxLAN offloads are enabled. We + * should disable tunnel offload features if it's not a VxLAN packet, + * as tunnel offloads have been enabled only for VxLAN. This is done to + * allow other tunneled traffic like GRE work fine while VxLAN + * offloads are configured in Skyhawk-R. + */ + switch (vlan_get_protocol(skb)) { + case htons(ETH_P_IP): + l4_hdr = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + l4_hdr = ipv6_hdr(skb)->nexthdr; + break; + default: + return features; + } + + if (l4_hdr != IPPROTO_UDP || + skb->inner_protocol_type != ENCAP_TYPE_ETHER || + skb->inner_protocol != htons(ETH_P_TEB) || + skb_inner_mac_header(skb) - skb_transport_header(skb) != + sizeof(struct udphdr) + sizeof(struct vxlanhdr)) + return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK); + + return features; } #endif |