[dpdk-dev] [PATCH v3 00/10] Add a VXLAN sample

Zhang, Helin helin.zhang at intel.com
Mon Jun 8 10:34:19 CEST 2015


Acked-by: Helin Zhang <helin.zhang at intel.com>

Thanks for the good example!

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Jijiang Liu
> Sent: Monday, June 8, 2015 11:02 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH v3 00/10] Add a VXLAN sample
> 
> This VXLAN sample simulates a VXLAN Tunnel Endpoint (VTEP) termination in
> DPDK, which is used to demonstrate the offload and filtering capabilities of i40
> NIC for VXLAN packet.
> 
> And this sample uses the basic virtio devices management function from vHost
> example, and the US-vHost interface and tunnel filtering mechanism to direct the
> traffic to/from a specific VM.
> 
> In addition, this sample is also designed to show how tunneling protocols can be
> handled. For the vHost interface, we do not need to support zero copy/inter VM
> packet transfer, etc. The approaches we took would be of benefit to you because
> we put a pluggable structure in place so that the application could be easily
> extended to support a new tunneling protocol.
> 
> The software framework is as follows:
> 
> 
>        |-------------------|   |-------------------|
>        | VM-1(VNI:100)     |   |  VM-2(VNI:200)    |
>        | |------| |------| |   | |------| |------| |
>        | |vport0| |vport1| |   | |vport0| |vport1| |
>        |-|------|-|------|-|   |-|------|-|------|-|      Guests
>                       \         /
>          |-------------\-------/--------|
>          |     us-vHost interface       |
>          |          |-|----|--|         |
>          |     decap| | TEP|  | encap   |       DPDK App
>          |          |-|----|--|         |
>          |            |    |            |
>          |------------|----|------------|
>                       |    |
>         |-------------|----|---------------|
>         |tunnel filter|    | IP/L4 Tx csum |
>         |IP/L4 csum   |    | TSO           |
>         |packet type  |    |               |               NIC
>         |packet recogn|    |               |
>         |-------------|----|---------------|
>                       |    |
>                       |    |
>                       |    |
>                      /-------\
>                     VXLAN Tunnel
> 
> The sample will support the followings:
> 1> Tunneling packet recognition.
> 
> 2> The port of UDP tunneling is configurable
> 
> 3> Directing incoming traffic to the correct queue based on the tunnel filter type
> such as inner MAC address and VNI.
> 
>  The VNI will be assigned from a static internal table based on the us-vHost
> device ID. Each device will receive a unique device ID. The inner MAC will be
> learned by  the first packet transmitted from a device.
> 
> 4> Decapsulation of Rx VXLAN traffic. This is a software only operation.
> 
> 5> Encapsulation of Tx VXLAN traffic. This is a software only operation.
> 
> 6> Tx outer IP, inner IP and L4 checksum offload
> 
> 7> TSO support for tunneling packet
> 
> The limitations:
> 1. No ARP support.
> 2. There are some duplicated source codes because I used  the basic virtio
> device management function from VHOST sample. Considering that the current
> VHOST sample is quite complicated and huge enough,  I think we shall have a
> separate sample for tunneling packet processing.
> 3. Currently, only the i40e NIC is tested in the sample, but other types of NICs will
> also be supported if they are able to support tunneling packet filter.
> 
> v2 changes:
>     Fixed an issue about the 'nb_ports' duplication in check_ports_num().
>     Removed the inaccurate comment in main.c
>     Fixed an issue about TSO offload.
> 
> v3 changes:
>     Changed some viriable name that don't follow coding rules.
>     Removed the limitation of VXLAN packet size due to TSO support.
>     Removed useless 'll_root_used' variable in vxlan_setup.c file.
>     Removed defination and use of '_htons'.
> 
> Jijiang Liu (10):
>   create VXLAN sample framework using virtio device management function
>   add basic VXLAN structures
>   addthe pluggable structures
>   implement VXLAN packet processing
>   add udp port configuration
>   add filter type configuration
>   add tx checksum offload configuration
>   add TSO offload configuration
>   add Rx checksum statistics
>   add encapsulation and decapsulation flags
> 
> 
>  examples/Makefile                      |    1 +
>  examples/tep_termination/Makefile      |   55 ++
>  examples/tep_termination/main.c        | 1205
> ++++++++++++++++++++++++++++++++
>  examples/tep_termination/main.h        |  129 ++++
>  examples/tep_termination/vxlan.c       |  262 +++++++
>  examples/tep_termination/vxlan.h       |   76 ++
>  examples/tep_termination/vxlan_setup.c |  444 ++++++++++++
>  examples/tep_termination/vxlan_setup.h |   77 ++
>  8 files changed, 2249 insertions(+), 0 deletions(-)  create mode 100644
> examples/tep_termination/Makefile  create mode 100644
> examples/tep_termination/main.c  create mode 100644
> examples/tep_termination/main.h  create mode 100644
> examples/tep_termination/vxlan.c  create mode 100644
> examples/tep_termination/vxlan.h  create mode 100644
> examples/tep_termination/vxlan_setup.c
>  create mode 100644 examples/tep_termination/vxlan_setup.h
> 
> --
> 1.7.7.6



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