virtiofsd is no longer installed by default in 24.04 when virt-manager/qemu is installed.

[ajgreeny]

I installed virt-manager in Xubuntu-24.04 and it worked well with Ubuntu-Mate-24.04 as guest but trying to enable shared files and folders between host and guest failed with message that no virtiofsd was available.
Installing virtiofsd as a separate package was successful, allowing sharing as in previous versions of Xubuntu until Mantic 23.10.

Can the package virtiofsd which was not avaiable separately in previous versions be a dependency of virt-manager in order to make sharing much easier to enable?

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: virtiofsd 1.10.0-1
ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
Uname: Linux 6.6.0-14-generic x86_64
ApportVersion: 2.27.0-0ubuntu6
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sun Feb 18 10:26:06 2024
InstallationDate: Installed on 2024-01-13 (36 days ago)
InstallationMedia: Xubuntu 24.04 LTS "Noble Numbat" - Daily amd64 (20240112)
SourcePackage: rust-virtiofsd
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mike Ferreira (mafoelffen)]

My thoughts... virtiofsd was added upstream in Debian as a separate package, then appeared as the same in Mantic...

To make it act the same as before, shouldn't it be pulled in with another package as a depends so that users do not have to wonder why it isn't working? <--- Because they do not yet know that it now needs to e installed manually as an extra, instead of it being included?

[Steffen McPrivacy (steffenmp)]

I added the rust-virtiofsd package to my Ubuntu 24.04 install, which I upgraded from 22.04.
Still not working as virtiofsd cannot write a log file to var/log/libvirt/qemu even when folder is RW for everyone

[Steffen McPrivacy (steffenmp)]

Quick hint from investigating.
I installed the librust-virtiofsd-dev and virtiofsd as in 24.04 it is not standard anymore via apt.

Still VMs are not working.
Problem: for the older VM which had posix=on and flock=on in the virtiofsd section in the XML file I had to remove it --> Solved the issue

Problem: virtualfsd cannot write to /var/log/libvirt/qemu
Not working: rw right on the /var/log/libvirt/qemu
Disabling AppArmor for libvirtd -> reboot -> solved the problem but is only a workaround
Still, reason unknown as in the apparmor profile: "libvirtd" the permissions for virtiofsd are good:
  /usr/{lib,lib64,lib/qemu,libexec}/virtiofsd PUx,
is in and should include the new /usr/libexec/virtiofsd as ok to run.

As I am not an AppArmor specalist, no glue why this was the issue.
I hope my short analysis is helping you as with this I got my machines running

[ajgreeny (ajg-charlbury)]

I do not have rust-virtiofsd package, in fact it does not seem to be available in the repos though rust-virtiofsd-dev is available.
Sharing of folders works well on my Xubuntu-24.04 systems simply by installing the virtiofsd package.