anynetbsdfs

[schmonz]

Would it be possible and sensible to also be able to mount any filesystem supported by NetBSD, via https://github.com/NetBSDfr/smolBSD ?

[nohajc]

Out of curiosity, which filesystems? Are you interested in various flavours of UFS/FFS?

I was thinking there might even be value in porting anylinuxfs to linux exactly because of this.

Anyway, while I haven't tried it, @slp, the author of libkrun, mentioned he tested with both FreeBSD and smolBSD. So it definitely boots.

[schmonz]

Yes, mainly reliable native FFSv1 and v2, but also anything else the NetBSD kernel can read and write, to broaden the list of filesystems supported here -- iff it fits well enough into your design goals to do so.

[nohajc]

Yes, well. I'm not a *BSD expert but I would think Linux already covers the most mainstream filesystems. So I couldn't think of anything else than those native filesystems used for BSD system drives.

Any broadening of support at this point is kind of niche. That's not to say I couldn't support NetBSD. It's mostly about how I bootstrap a VM image (which should be handled by the smolBSD project already) and whether it supports all the paravirtualized drivers I rely on. That's mostly virtio-blk for storage and virtio-net for host <-> guest communication.

[nohajc]

So, I will leave this open as a potential improvement. Although I wouldn't say the end goal is to support all Unix-like guests we could think of.

Another roadblock might be Rust cross-compilation support for increasingly exotic target triples. I already had issues with arm64 FreeBSD toolchain.

[nohajc]

@schmonz Not sure about the compatibility between various *BSDs but you can now mount the FreeBSD UFS.