[pve-devel] [PATCH qemu-server v3 04/10] stop cleanup: remove unnecessary tpmstate cleanup

[Fiona Ebner]

Adding the rationale for third-party plugins from last time:
https://lists.proxmox.com/pipermail/pve-devel/2024-March/062354.html

Am 19.04.24 um 14:45 schrieb Dominik Csapak:
> tpmstate0 is already included in `get_vm_volumes`, and our only storage
> plugin that has unmap_volume implemented is the RBDPlugin, where we call
> unmap in `deactivate_volume`. So it's already ummapped by the
> `deactivate_volumes` calls above.
> 

For third-party storage plugins, it's natural to expect that
deactivate_volume() would also remove a mapping for the volume just
like RBDPlugin does.

While there is an explicit map_volume() call in start_swtpm(), a
third-party plugin might expect an explicit unmap_volume() call too.
However, the order of calls right now is
1. activate_volume()
2. map_volume()
3. deactivate_volume()
4. unmap_volume()

Which seems like it could cause problems already for third-party
plugins relying on an explicit unmap call.

All that said, it is unlikely that a third-party plugin breaks. If it
really happens, it can be discussed/adapted to the actual needs still.

> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>

Acked-by: Fiona Ebner <f.ebner at proxmox.com>

> ---
>  PVE/QemuServer.pm | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
> index 28e630d3..680c36f2 100644
> --- a/PVE/QemuServer.pm
> +++ b/PVE/QemuServer.pm
> @@ -6172,14 +6172,6 @@ sub vm_stop_cleanup {
>  	if (!$keepActive) {
>  	    my $vollist = get_vm_volumes($conf);
>  	    PVE::Storage::deactivate_volumes($storecfg, $vollist);
> -
> -	    if (my $tpmdrive = $conf->{tpmstate0}) {
> -		my $tpm = parse_drive("tpmstate0", $tpmdrive);
> -		my ($storeid, $volname) = PVE::Storage::parse_volume_id($tpm->{file}, 1);
> -		if ($storeid) {
> -		    PVE::Storage::unmap_volume($storecfg, $tpm->{file});
> -		}
> -	    }
>  	}
>  
>  	foreach my $ext (qw(mon qmp pid vnc qga)) {