I'm trying to add support for virtiofs mounts to mkosi [here](https://github.com/systemd/mkosi/pull/1910). I've more or less followed the example from the readme, but it's not working and the error messages are very unclear so I'm at a loss on how to proceed. Qemu error messages: ``` qemu-kvm: Failed to write msg. Wrote -1 instead of 20. qemu-kvm: vhost_set_vring_kick failed: Invalid argument (22) qemu-kvm: Failed to set msg fds. qemu-kvm: vhost VQ 0 ring restore failed: -22: Invalid argument (22) qemu-kvm: Error starting vhost: 22 qemu-kvm: Failed to set msg fds. qemu-kvm: vhost_set_vring_call failed: Invalid argument (22) qemu-kvm: Failed to set msg fds. qemu-kvm: vhost_set_vring_call failed: Invalid argument (22) qemu-kvm: Unexpected end-of-file before all data were read ``` virtiofsd error messages: ``` Sep 20 11:40:25 daandemeyer-fedora-PC1EV17T virtiofsd[189445]: daandemeyer-fedora-PC1EV17T virtiofsd[189445]: Failure when trying to set the limit to 1000000, the hard limit (100000) of open file descriptors is used instead. Sep 20 11:40:25 daandemeyer-fedora-PC1EV17T virtiofsd[189448]: daandemeyer-fedora-PC1EV17T virtiofsd[189445]: Waiting for vhost-user socket connection... Sep 20 11:40:25 daandemeyer-fedora-PC1EV17T virtiofsd[189448]: daandemeyer-fedora-PC1EV17T virtiofsd[189445]: Client connected, servicing requests Sep 20 11:40:26 daandemeyer-fedora-PC1EV17T virtiofsd[189448]: daandemeyer-fedora-PC1EV17T virtiofsd[189445]: Waiting for daemon failed: HandleRequest(InvalidParam) ``` virtiofsd version: `virtiofsd backend 1.7.0` qemu version: `QEMU emulator version 7.2.5 (qemu-7.2.5-1.fc38)` virtiofsd command line: ``` /usr/libexec/virtiofsd --socket-path /tmp/virtiofs-a70c00d65af025c32944646d8ea --shared-dir /home/daandemeyer/projects/mkosi --syslog ``` qemu command line: ``` ‣ + qemu-kvm -machine type=q35,accel=kvm,smm=off -smp 1 -m 2G -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0,id=rng-device0 -nic user,model=virtio-net-pci -device vhost-vsock-pci,guest-cid=3436578145 -cpu max -nographic -nodefaults -chardev stdio,mux=on,id=console,signal=off -serial chardev:console -mon console -chardev socket,id=virtiofs-a70c00d65af025c32944646d8ea,path=/tmp/virtiofs-a70c00d65af025c32944646d8ea -device vhost-user-fs-pci,queue-size=1024,chardev=virtiofs-a70c00d65af025c32944646d8ea,tag=virtiofs-a70c00d65af025c32944646d8ea -smbios type=11,value=io.systemd.credential.binary:agetty.autologin=cm9vdA== -smbios type=11,value=io.systemd.credential.binary:login.noauth=eWVz -smbios type=11,value=io.systemd.credential.binary:firstboot.timezone=RXVyb3BlL0Ftc3RlcmRhbQ== -smbios type=11,value=io.systemd.credential.binary:firstboot.locale=Qy5VVEYtOA== -smbios 'type=11,value=io.systemd.stub.kernel-cmdline-extra=console=ttyS0 systemd.tty.term.console=xterm-256color systemd.tty.columns.console=236 systemd.tty.rows.console=55 systemd.tty.term.ttyS0=xterm-256color systemd.tty.columns.ttyS0=236 systemd.tty.rows.ttyS0=55 console=ttyS0 systemd.wants=network-online.target module_blacklist=vmw_vmci ip=enp0s1:any ip=enp0s2:any ip=host0:any loglevel=4 SYSTEMD_SULOGIN_FORCE=1 systemd.mount-extra=virtiofs-a70c00d65af025c32944646d8ea:/root/src/mkosi:virtiofs' -kernel /home/daandemeyer/projects/mkosi/mkosi.output/image.vmlinuz -append ' console=ttyS0 systemd.tty.term.console=xterm-256color systemd.tty.columns.console=236 systemd.tty.rows.console=55 systemd.tty.term.ttyS0=xterm-256color systemd.tty.columns.ttyS0=236 systemd.tty.rows.ttyS0=55 console=ttyS0 systemd.wants=network-online.target module_blacklist=vmw_vmci ip=enp0s1:any ip=enp0s2:any ip=host0:any loglevel=4 SYSTEMD_SULOGIN_FORCE=1 systemd.mount-extra=virtiofs-a70c00d65af025c32944646d8ea:/root/src/mkosi:virtiofs' -initrd /home/daandemeyer/projects/mkosi/mkosi.output/image -smbios type=11,value=io.systemd.credential:vmm.notify_socket=vsock-stream:2:1230524563 ```