[pve-devel] [PATCH qemu-server 14/16] introduce QSD module for qemu-storage-daemon functionality

[Laurent GUERBY]

On Tue, 2025-10-14 at 16:39 +0200, Fiona Ebner wrote:
> For now, supports creating FUSE exports based on Proxmox VE drive
> definitions. NBD exports could be added later. In preparation to allow
> qcow2 for TPM state volumes. A QEMU storage daemon instance is
> associated to a given VM.

Hi,

I wonder if this addition of qemu-storage-daemon with fuse would be
able to solve the following issue I just opened:

https://bugzilla.proxmox.com/show_bug.cgi?id=6953

"cannot set set-require-min-compat-client to reef, luminous clients
from kernel rbd due to VM with TPM /dev/rbd"

The rbd kernel module feature is stuck to luminous and swtpm use of
kernel /dev/rbd limits the usable features of the whole proxmox/ceph
cluster as soon as a VM with TPM is created on the cluster.

If possible using qemu-storage-daemon to export the rbd image to swtpm
would still allow proxmox to leave the TPM disk on ceph while
benefiting from recent ceph features.

Sincerely,

Laurent GUERBY

PS: ZFS over iSCSI isn't usable for TPM as well
https://bugzilla.proxmox.com/show_bug.cgi?id=3662
TPM disfunctional with ZFS over iSCSI