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i40evf: Fix Outer UDP RX checksum code

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Inner protocol being UDP should not stop us from verifying Outer UDP
checksum correctness.

If the Outer protocol is not UDP (NVGRE) we should not be doing a UDP
checksum check. If the packet has zero checksum, skip checksum check.

Change-ID: Ie7f153feb276a59f66a54a0938901b2c0a8100fa
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Anjali Singhai Jain 2015-03-31 00:44:59 -07:00 committed by Jeff Kirsher
parent 11a9c7821c
commit 818f2e7b25
1 changed files with 13 additions and 11 deletions
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24
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
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@ -915,9 +915,7 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi,
* so the total length of IPv4 header is IHL*4 bytes
* The UDP_0 bit *may* bet set if the *inner* header is UDP
*/
if (ipv4_tunnel &&
(decoded.inner_prot != I40E_RX_PTYPE_INNER_PROT_UDP) &&
!(rx_status & (1 << I40E_RX_DESC_STATUS_UDP_0_SHIFT))) {
if (ipv4_tunnel) {
skb->transport_header = skb->mac_header +
sizeof(struct ethhdr) +
(ip_hdr(skb)->ihl * 4);
@ -927,15 +925,19 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi,
skb->protocol == htons(ETH_P_8021AD))
? VLAN_HLEN : 0;
rx_udp_csum = udp_csum(skb);
iph = ip_hdr(skb);
csum = csum_tcpudp_magic(
iph->saddr, iph->daddr,
(skb->len - skb_transport_offset(skb)),
IPPROTO_UDP, rx_udp_csum);
if ((ip_hdr(skb)->protocol == IPPROTO_UDP) &&
(udp_hdr(skb)->check != 0)) {
rx_udp_csum = udp_csum(skb);
iph = ip_hdr(skb);
csum = csum_tcpudp_magic(iph->saddr, iph->daddr,
(skb->len -
skb_transport_offset(skb)),
IPPROTO_UDP, rx_udp_csum);
if (udp_hdr(skb)->check != csum)
goto checksum_fail;
if (udp_hdr(skb)->check != csum)
goto checksum_fail;
} /* else its GRE and so no outer UDP header */
}
skb->ip_summed = CHECKSUM_UNNECESSARY;