[yocto] Including TUN/TAP kernel drivers for openVPN

[Tim Orling]

Related:
https://superuser.com/questions/497245/how-to-load-tun-module-in-linux

On Sat, Jun 10, 2017 at 7:01 AM Brett R. Nicholas <
Brett.R.Nicholas.TH at dartmouth.edu> wrote:

> Hi there,
>
>
> I'm using Yocto (morty) to build a custom linux image for a Zedboard. I
> need  the image to run openVPN, which requires access to the TUN/TAP
> virtual network interface. I successfully incorporated openVPN and all its
> dependencies into my image using the meta-networking layer, but it appears
> that the necessary TUN/TAP kernel drivers are not present in the image.
>
>
> *How can I ensure that the TUN/TAP kernel drivers are included in my
> image?*
>
>
> I have the following two lines in my conf/local.conf file:
>
> IMAGE_INSTALL_append = " kernel-modules"
>
> CORE_IMAGE_EXTRA_INSTALL += "openssl openvpn docker tunctl
>
>
> I don't know how I could include them in my image. I tried adding
> kernel-module-tun to my IMAGE_INSTALL_append as mentioned here (
> https://lists.yoctoproject.org/pipermail/yocto/2014-September/021698.html)
> <https://lists.yoctoproject.org/pipermail/yocto/2014-September/021698.html>,
> but it does not appear this is a valid package provided by any of my
> layers. Maybe I am doing this part incorrectly?
>
>
> I also tried using bitbake -c menuconfig virtual/kernel to manual include
> the modules in the image, however after doing this and rerunning bitbake
> core-image-minimal I still did not see tun.ko appear in either of the two
> locations below that I would expect them to be installed to:
>
> ${BUILDDIR}/tmp/work/zedboard_zynq7-poky-linux-gnueabi/core-image-minimal/1.0-r0/rootfs/lib/modules/4.6.0-xilinx-v2016.3/kernel/net/
>
>
> or
>
> ${BUILDDIR}/tmp/work/zedboard_zynq7-poky-linux-gnueabi/linux-xlnx/4.6-xilinx-v2016.3+gitAUTOINC+0e4e407149-r0/image/lib/modules/4.6.0-xilinx-v2016.3/kernel/net
>
> I should note that I'm using the meta-xilinx and meta-xilinx-tools layers
> in addition to a few custom layers of my own. None of these should affect
> this problem, AFAIK.
>
> Any help appreciated, thanks!
> - Brett
>
> --
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