From ffcc55c0c2a85835a4ac080bc1053c3a277b88e2 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Mon, 25 Jan 2016 19:32:54 -0800 Subject: [PATCH] i40e: Add support for ATR w/ IPv6 extension headers This patch updates the code for determining the L4 protocol and L3 header length so that when IPv6 extension headers are being used we can determine the offset and type of the L4 protocol. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 159fb6eed375..1d3afa7dda18 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2044,7 +2044,7 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, struct tcphdr *th; unsigned int hlen; u32 flex_ptype, dtype_cmd; - u8 l4_proto; + int l4_proto; u16 i; /* make sure ATR is enabled */ @@ -2062,25 +2062,23 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, if (!(tx_flags & (I40E_TX_FLAGS_IPV4 | I40E_TX_FLAGS_IPV6))) return; - if (!(tx_flags & I40E_TX_FLAGS_UDP_TUNNEL)) { - /* snag network header to get L4 type and address */ - hdr.network = skb_network_header(skb); + /* snag network header to get L4 type and address */ + hdr.network = (tx_flags & I40E_TX_FLAGS_UDP_TUNNEL) ? + skb_inner_network_header(skb) : skb_network_header(skb); + /* Note: tx_flags gets modified to reflect inner protocols in + * tx_enable_csum function if encap is enabled. + */ + if (tx_flags & I40E_TX_FLAGS_IPV4) { /* access ihl as u8 to avoid unaligned access on ia64 */ - if (tx_flags & I40E_TX_FLAGS_IPV4) - hlen = (hdr.network[0] & 0x0F) << 2; - else - hlen = sizeof(struct ipv6hdr); + hlen = (hdr.network[0] & 0x0F) << 2; + l4_proto = hdr.ipv4->protocol; } else { - hdr.network = skb_inner_network_header(skb); - hlen = skb_inner_network_header_len(skb); + hlen = hdr.network - skb->data; + l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL); + hlen -= hdr.network - skb->data; } - /* Note: tx_flags gets modified to reflect inner protocols in - * tx_enable_csum function if encap is enabled. - */ - l4_proto = (tx_flags & I40E_TX_FLAGS_IPV4) ? hdr.ipv4->protocol : - hdr.ipv6->nexthdr; if (l4_proto != IPPROTO_TCP) return; -- 2.11.0