!276 support set/get VxLAN rule of rx flow director by ethtool

Merge Pull Request from: @svishen 
 
Background:
Currently, the HNS3 driver, Linux kernel, and standard tools do not support the configuration of VXLAN tunnel tuple information as the key of the flow table. The ethtool –U command supports only the configuration of tuples for non-tunnel packets. Two types of tuples, vxlan4 and vxlan6, need to be added.

Functions:
The vxlan4 and vxlan6 flow types are added to the ethtool –U command. The vni in the outer header and the source MAC address, destination MAC address, source IP address, destination IP address, and VLAN ID in the inner header can be configured as tuple information. The HNS3 driver supports all tuple configurations of both types.

patch name:
(1) net: ethtool: add VxLAN to the NFC API
(2) net: hns3: support set/get VxLAN rule of rx flow director by ethtool


In include/uapi/linux/ethtool.h
We changed a union, but didn't change its size.Neither of the two newly added members exceeds 52 bytes.

The impact on user-mode tools is as follows:
(1)The new tool is compiled on the old kernel and can configure the old flow table. The old kernel does not support VXLAN configuration.

```
[root@locaLhost ~]#
[root@localhost alt rpm -ga | grep ethtool
ethtool-5.15-4.aarch64
[root@localhost ~]#
[root@localhost ~]# uname -a
Linux localhost.localdomain 5.10.0-60.18.0.50.0e2203.aarch64 #1 SMP Wed Mar 30 02:43:08 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
[root@localhost ~]#
[root@localhost ~]# ethtool -U enol flow-type tep6 tclass Oxi8 src-ip fese::218:2dff:feee:12 loc 4 action -1
[root@localhost ~]# ethtool -u
ethtool: bad command line argument(s)
For more information run ethtool -h
[root@localhost ~]# ethtool -u eno1
32 RX rings available
Total 1 rules
Filter: 4
Rule Type: TCP over IPv6
Src IP addr: fe80::218:2dff:fe00:12 mask: :
Dest Ip addr: :: mask: ffff:ffff:fff:ffff:ffff:ffff:ffff:ffff
Traffic class: 0x18 mask: 0x0
Src port: 0 mask: Oxffff
Dest'port: 0 mask: 0xffff
Action: Drop
[root@localhost ~]# ethtool -U enol flow-type udp4 src-ip 1.1.1.1 vf @ loc 4 queue 2
[root@localhost ~]# ethtool -u enot
32 RX rings available
Total 1 rules
Filter: 4
Rule Type: UDP over IPv4
Src IP addr: 1.1.1.1 mask: 0.0.0.0
Dest IP addr: 0.0.0.0 mask: 255.255.255.255
TOS: 0x0 mask: Oxff
Src port: 0 mask: oxffff
Dest'port: 0 mask: 0xffff
Action: Direct to VF 0 queue 2
[root@localhost ~]# ethtool -U enol flow-type vxlan src-ip 192.168.1.2 loc 4
Add rule, invalid syntax
ethtool: bad command line argument(s)
For more information run ethtool -h
[root@localhost ~]#

```


(2)The old tool is deployed on the new kernel and can configure the old flow table.

```
[root@localhost aarch64]# uname -a
inux (none) 5.106.0+ #1 SMP Thu Nov 24 21:25:01 CST 2022 aarch64 GNU/Linux
[root@localhost aarch64]#
[root@localhost aarch64]# ethtool --version
sthtool version 5.10
[root@localhost aarch64]#
-oot@fpga: /root# ethtool -U eth1 flow-type tcp4 src-ip 192.168.49.30 action 3 loc 4
[root@localhost aarch64]# /root#
[root@localhost aarch64]# ethtool -u etht
1 RX rings_ available
Total 1 rules
-ilter: 4
Rule Type: TCP over IPv4
Src IP addr: 192.168.40.30 mask: 0.0.0.0
Dest IP addr: 0.0.0.0 mask: 255.255.255.255
TOS: 0x0 mask: 0xff
Src port: 0 mask: oxffff
Dest port: 0 mask: Oxffff
Action: Direct to queue 3
[root@localhost aarch64]# ethtool -U eth1 delete 4
[root@localhost aarch64]# ethtool -u eth1
4 RX rings_available
Total @ rules
[root@localhost aarch64]#
```


(3)The VXLAN flow table is successfully configured using the new kernel and tool.

```
[root@localhost aarch64]# ip Link add vxlan® type vxlan id 100 local 192.168.1.2 remote 192.168.1.3 dstport 4789 dev eno1
[root@localhost aarch64]# ethtool -u enol
32 RX rings available
Total 1 rules
Filter: 511
Rule Type: Vxlan IPv4
Vni:  100 mask: 0x0
Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
Dest MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
Ethertype: 0x0 mask: OxFFFF
Src IP addr: 0.0.0.0 mask: 255.255.255.255
Dest IP addr: 192.168.1.3 mask: 0.0.0.0
TOS: 0x0 mask: Oxff
L4 protocol: © mask: Oxff
Action: Direct to queue 0
[root@localhost aarch64]#
[root@localhost aarch64]# ethtool -N eno1 delete 511
[root@localhost aarch64]# ethtool -u eno1
52 Rx rings available
Total o rdles
[root@localhost aarch64]#
[root@localhost aarch64]# ethtool -U eno1 flow-type vxlan4 vni 100 dst-ip 192.168.1.3
Added rule with ID 511
[root@localhost aarch64]# ethtool -u enot
52 Rx rings available
Total 1 rules
Filter: 511
Rule Type: Vxlan IPv4
Vni:  100 mask: 0x0
Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
Dest MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
Ethertype: 0x0 mask: 0xFFFF
Src IP addr: 0.0.0.0 mask: 255.255.255.255
Dest IP addr: 192.168.1.3 mask: 0.0.0.0
TOS: 0x0 mask: oxff
L4 protocol: © mask: Oxff
Action: Direct to queue 0
[root@localhost aarch64]# uname -a
Linux localhost.localdomain 5.10.0+ #10 SMP Fri Nov 25 14:12:36 CST 2022 aarch64 aarch64 aarch64 GNU/Linux
[root@localhost aarch64]# ethtool --version
ethtool version 5.15
```

 
 
Link:https://gitee.com/openeuler/kernel/pulls/276

 
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>