Re: [RFC PATCH] virtfs: 9p: local: add default uid and gid options

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Wednesday, 28 January 2026 20:13:45 CET Andrey Erokhin wrote:
> > I was trying to boot from a directory tree owned by an ordinary user,
> > and some daemons weren't happy about non-root ownership of some files
> > 
> > Example use:
> > -virtfs local,path=rootfs,mount_tag=root,security_model=mapped,uid=0,gid=0
> 
> I personally switched from fuse-overlayfs to user namespaces+kernel overlay
> fs (for writeable overlay for rootfs) long time ago, so I do not need
> uid=0,gid=0, I'm being mapped to 0:0 in the user namespace. I wanted to
> publish this change to support users which can't use user namespaces, but
> yesterday I realized I could just run QEMU (with fuse-overlayfs) under
> fakeroot 🤦‍♂️

Nevertheless you already came more than half way to finish this. All it would 
take is adding some lines to the command line docs.

But if you don't have the chance to finish this, no problem either, then I'm 
going to pin your current patch version to 
https://wiki.qemu.org/Documentation/9p#Implementation_Plans in case somebody 
else might be interested to finish this in future. Your call.

/Christian