Can we use a rump kernel to implement ext4?

[Joshua Branson]

Slightly related question, I just quickly read the intro text to the
rump kernel on rumpkernel.org.  And I read

"We solve the problem by providing free, reusable, componentized, kernel
quality drivers such as file systems..."

Could someone use a rump kernel to implement more modern filsystems?
The Hurd currently mainly just uses ext2 at the moment...

Luca Dariz <luca.dariz@gmail.com> writes:

> Il 02/05/2018 00:27, Joseph Edward Hemann ha scritto:
>> Hello GNU Hurd community
>
> Hello Joseph!
>
>> Looking through your contribution page I found a project that that
>> seemed interesting to me, writing driver for virtio for KVM
>> (https://www.gnu.org/software/hurd/open_issues/virtio.html), but the
>> issue seemed quite old, so I wanted to make sure that it is still open.
>
> I am interested in virtio drivers too :)
> Some time ago I used rump drivers from netbsd and I was able to use
> logical devices (ld) drivers, see [1].
> Then I wanted to use virtio9p (missing in rump kernel drivers) and I
> started porting Linux LXL [2] but some things are stil missing to pass
> all the tests, plus I needed to patch libfuse [3]. Then I didn't have
> enough time to finish the work, but maybe you can use it as a starting
> point, probably only the PCI glue is needed.
>
> Hope it helps
> Luca
>
> [1] https://lists.debian.org/debian-hurd/2017/02/msg00030.html
> [2] https://github.com/luckyluke/linux/tree/hurd_fuse
> [3] https://github.com/luckyluke/libfuse