apps/int/vxlan-gpe not support linux kernel version 4.x about p4factory HOT 2 OPEN

I found that vxlan codes changed a lot during Linux kernel 4.x

from p4factory.

Steps to compile vxlan kernel module with ubuntu 16.04: (e.g. degrade kernel 4.4.x to 3.19.8)

1. Download Kernel/MainlineBuilds with kernel 3.19.8

• headers, 32-bit, 64-bit
• images, 32-bit, 64-bit

2. install module-init-tools, sudo apt-get install module-init-tools
3. install linux-headers and linux-image, sudo dpkg -i linux-headers-3.19.8-031908_3.19.8-031908.201505110938_all.deb, sudo dpkg -i linux-image-3.19.8-031908-generic_3.19.8-031908.201505110938_amd64.deb
4. modify /usr/src/linux-headers-3.19.8-031908-generic/include/generated/utsrelease.h macro #define UTS_UBUNTU_RELEASE_ABI 031908 to #define UTS_UBUNTU_RELEASE_ABI 31908, as dkms use the macro as octal data.
5. remove old docker images, as we don't have aufs module for 3.19.8 now. sudo mv /var/lib/docker /var/lib/docker.old
6. reboot, and select grub menu "Advanced options for Ubuntu", then select "Ubuntu, with Linux 3.19.8-031908-generic"
7. check kernel has been degraded to 3.19.8, uname -a
8. compile and run apps/int/vxlan-gpe

You may have a look at my blog: startup_with_old_kernel and docker_failed_after_update_kernel.

After degrade linux kernel, I can now compile run vxlan.ko but I encountered into some other issues, and still worked hard to run apps/int.

from p4factory.