no tun in stock kernel?

Discussion about U-Boot and the kernel.

no tun in stock kernel?

Postby Socaltom » Wed Sep 14, 2016 2:22 pm

[root@Pogoserver tom]# modprobe tun
modprobe: FATAL: Module tun not found in directory /lib/modules/4.4.19-1-ARCH


This is on a fresh install on an NSA325, followed by -Syu

openvpn won't run and complains about lacking tap/tun device
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Re: no tun in stock kernel?

Postby WarheadsSE » Wed Sep 14, 2016 3:07 pm

That is not right.

That should have the linux-kirkwood package, and that is at 4.4.20-1, which I have also confirmed does have the tun modules and support in the kernel config.
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Re: no tun in stock kernel?

Postby Socaltom » Thu Sep 15, 2016 3:06 am

$this->bbcode_second_pass_quote('WarheadsSE', 'T')hat is not right.

That should have the linux-kirkwood package, and that is at 4.4.20-1, which I have also confirmed does have the tun modules and support in the kernel config.


I looked a little closer, and 4.4.20-1 is installed, so I created a link from 4.4.19-1 to 4.4.20-1 and it works, but something isn't right because modprobe thinks I'm on 4.4.19-1. Why would that happen? I only installed about a week ago, and everything was freshly downloaded, and I did an Syu immediately after it installed.
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Re: no tun in stock kernel?

Postby moonman » Thu Sep 15, 2016 4:28 am

That usually happens if you have a separate boot partition which is not linked in anyway to /boot on rootfs partition so you end up booting an old kernel with modules for the new kernel in the rootfs
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Re: no tun in stock kernel?

Postby Socaltom » Thu Sep 15, 2016 12:57 pm

$this->bbcode_second_pass_quote('moonman', 'T')hat usually happens if you have a separate boot partition which is not linked in anyway to /boot on rootfs partition so you end up booting an old kernel with modules for the new kernel in the rootfs

I knew I forgot something!
I copied /boot to /dev/sda1
Created van fstab entry to mount /dev/sda1 as /boot and rebooted now all is good
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Re: no tun in stock kernel?

Postby summers » Thu Sep 15, 2016 1:05 pm

Note that if you are moving to a more recent uboot, then you don't need a separate boot partition. Stock needs a separate boot partition, because stock uboot can't read ext4. However when uboot is updated it does understand ext4, and so you can just have a single root partition. Long term that makes it easier to maintain.

Of course the hassle us you typically only update uboot, once you have arch already install, with a separate boot partition. I solved that by pulling the hdd, copying the file system off the disk (with tar), repartitioning the disk, then copying everything back again ...
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