From a3fd9d8876a589f05725237aced606b995956860 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Sun, 24 Jan 2016 21:16:54 -0800 Subject: [PATCH] i40e/i40evf: Handle IPv6 extension headers in checksum offload This patch adds support for IPv6 extension headers in setting up the Tx checksum. Without this patch extension headers would cause IPv6 traffic to fail as the transport protocol could not be identified. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 14 +++++++++++++- drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 14 +++++++++++++- 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 1404cae04b83..e49fe8f580b1 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2402,7 +2402,9 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, struct udphdr *udp; unsigned char *hdr; } l4; + unsigned char *exthdr; u32 l4_tunnel = 0; + __be16 frag_off; u8 l4_proto = 0; ip.hdr = skb_network_header(skb); @@ -2419,7 +2421,12 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, l4_proto = ip.v4->protocol; } else if (*tx_flags & I40E_TX_FLAGS_IPV6) { *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6; + + exthdr = ip.hdr + sizeof(*ip.v6); l4_proto = ip.v6->nexthdr; + if (l4.hdr != exthdr) + ipv6_skip_exthdr(skb, exthdr - skb->data, + &l4_proto, &frag_off); } /* define outer transport */ @@ -2469,8 +2476,13 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4; } } else if (*tx_flags & I40E_TX_FLAGS_IPV6) { - l4_proto = ip.v6->nexthdr; *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV6; + + exthdr = ip.hdr + sizeof(*ip.v6); + l4_proto = ip.v6->nexthdr; + if (l4.hdr != exthdr) + ipv6_skip_exthdr(skb, exthdr - skb->data, + &l4_proto, &frag_off); } /* Now set the td_offset for IP header length */ diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 39d5f807f08c..48ec7631b3dd 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1619,7 +1619,9 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, struct udphdr *udp; unsigned char *hdr; } l4; + unsigned char *exthdr; u32 l4_tunnel = 0; + __be16 frag_off; u8 l4_proto = 0; ip.hdr = skb_network_header(skb); @@ -1636,7 +1638,12 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, l4_proto = ip.v4->protocol; } else if (*tx_flags & I40E_TX_FLAGS_IPV6) { *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6; + + exthdr = ip.hdr + sizeof(*ip.v6); l4_proto = ip.v6->nexthdr; + if (l4.hdr != exthdr) + ipv6_skip_exthdr(skb, exthdr - skb->data, + &l4_proto, &frag_off); } /* define outer transport */ @@ -1686,8 +1693,13 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4; } } else if (*tx_flags & I40E_TX_FLAGS_IPV6) { - l4_proto = ip.v6->nexthdr; *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV6; + + exthdr = ip.hdr + sizeof(*ip.v6); + l4_proto = ip.v6->nexthdr; + if (l4.hdr != exthdr) + ipv6_skip_exthdr(skb, exthdr - skb->data, + &l4_proto, &frag_off); } /* Now set the td_offset for IP header length */ -- 2.39.2