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'.
v4 changes:
Fixed most of warnings detected by the checkpatch.pl in the main.c file,
and
there are still some wairnings(line over 80 characters) in the main.c
and main.h file.
Fixed all of warnings detected by the checkpatch.pl in other files.
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 | 1277 ++++++++++++++++++++++++++++++++
examples/tep_termination/main.h | 129 ++++
examples/tep_termination/vxlan.c | 260 +++++++
examples/tep_termination/vxlan.h | 86 +++
examples/tep_termination/vxlan_setup.c | 457 ++++++++++++
examples/tep_termination/vxlan_setup.h | 87 +++
8 files changed, 2352 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
