CVSW is a vNIC driver designed for offloading packet processing of high functional virtual switches. CVSW enables per-VM packet processing, which reduces the load and simplifies the flow table of the virtual switch. CVSW's functionality can be managed by OpenFlow controllers or command-line shells. Here, supported functions are listed as follows:
- Para-virtualized network driver (virtio-net)
- OpenFlow 1.0 Match-Action
- MTU size setting
- Offload setting
- VXLAN, NVGRE, STT, Geneve, and VXLAN over SCLP tunneling (cvsw-nvo3 branch)
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- cvsw-nvo3 : Supports VXLAN, NVGRE, STT, Geneve, and VXLAN over SCLP tunnels
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cvsw_net.h : CVSW message definition
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openflow.h : OpenFlow message definition
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cvsw_ctl.c : CVSW message handling
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cvsw_table.c : OpenFlow table management
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cvsw_data.c : Data plane packet processing
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skb_util.c : SKB handling utility
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distributions/ : virtio_net files for each distribution
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compat/ : Kernel provided files for upper compatibility
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test/ : Test programs (pre-defined flow table)
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test/entries/ : Flow entry samples
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ext/ : Tunnel processing (cvsw-nvo3 branch)
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Currently CVSW has been tested with KVM on the following distributions.
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Redhat Enterprise Linux 6.5, 6.6
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Redhat Enterprise Linux 7.0, 7.1
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Fedora 20
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Ubuntu 14.04
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See 'INSTALL.md'
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Overview and architectural details of CVSW are described in the following papers.
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R. Kawashima and H. Matsuo, "Accelerating the Performance of Software Tunneling using a Receive Offload-aware Novel L4 Protocol", IEICE Transactions on Communications, vol.E98-B, no.11, 2015 (to appear)
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R. Kawashima, S. Muramatsu, H. Nakayama, T. Hayashi, and H. Matsuo, "SCLP: Segment-oriented Connection-Less Protocol for High-Performance Software Tunneling in Datacenter Networks", Proc. 1st IEEE Network Softwarization (NetSoft 2015), pp.1-8, London, April 2015.
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R. Kawashima and H. Matsuo, "Implementing and Performance Analysis of STT Tunneling using vNIC Offloading Framework (CVSW)", Proceedings of IEEE 6th International Conference on Cloud Computing Technology and Science (CloudCom 2014), pp.929-934, Singapore, Dec. 2014.
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R. Kawashima and H. Matsuo, "Virtual NIC Offloading Approach for Improving Performance of Virtual Networks", The Transactions of Institute of Electronics Information and Communication Engineers B (IEICE), vol.J97-B, no.8, pp.639-647, 2014 (Japanese).
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Ryota Kawashima <kawa1983@ieee.org>