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This patch adds a framework that allows GSO on tunneled packets. Furthermore, it leverages that framework to provide GSO support for VxLAN-encapsulated packets. Supported VxLAN packets must have an outer IPv4 header (prepended by an optional VLAN tag), and contain an inner TCP/IPv4 packet (with an optional inner VLAN tag). VxLAN GSO doesn't check if input packets have correct checksums and doesn't update checksums for output packets. Additionally, it doesn't process IP fragmented packets. As with TCP/IPv4 GSO, VxLAN GSO uses a two-segment MBUF to organize each output packet, which mandates support for multi-segment mbufs in the TX functions of the NIC driver. Also, if a packet is GSOed, VxLAN GSO reduces its MBUF refcnt by 1. As a result, when all of its GSO'd segments are freed, the packet is freed automatically. Signed-off-by: Mark Kavanagh <mark.b.kavanagh@intel.com> Signed-off-by: Jiayu Hu <jiayu.hu@intel.com> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com> |
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| README | ||
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD license for the core libraries and drivers. The kernel components are GPLv2 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org