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6a674e9c75
This patch adds support in the kernel for offloading in the NIC Tx and Rx checksumming for encapsulated packets (such as VXLAN and IP GRE). For Tx encapsulation offload, the driver will need to set the right bits in netdev->hw_enc_features. The protocol driver will have to set the skb->encapsulation bit and populate the inner headers, so the NIC driver will use those inner headers to calculate the csum in hardware. For Rx encapsulation offload, the driver will need to set again the skb->encapsulation flag and the skb->ip_csum to CHECKSUM_UNNECESSARY. In that case the protocol driver should push the decapsulated packet up to the stack, again with CHECKSUM_UNNECESSARY. In ether case, the protocol driver should set the skb->encapsulation flag back to zero. Finally the protocol driver should have NETIF_F_RXCSUM flag set in its features. Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the IP protocol.
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*
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* Version: @(#)ip.h 1.0.2 04/28/93
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*
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* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_IP_H
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#define _LINUX_IP_H
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#include <linux/skbuff.h>
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#include <uapi/linux/ip.h>
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static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
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{
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return (struct iphdr *)skb_network_header(skb);
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}
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static inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb)
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{
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return (struct iphdr *)skb_inner_network_header(skb);
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}
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static inline struct iphdr *ipip_hdr(const struct sk_buff *skb)
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{
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return (struct iphdr *)skb_transport_header(skb);
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}
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#endif /* _LINUX_IP_H */
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