and make it match with what parse_drive does. Even though the 'real' format
was pve-volume-id, callers already expected that parse_drive returns a hash
with a valid 'file' key (e.g. PVE/API2/Qemu.pm:1147ff).

Signed-off-by: Fabian Ebner <f.eb...@proxmox.com>
---

This is the last patch left over from the series
refactoring the drive code [0], although not directly related.

[0]: https://pve.proxmox.com/pipermail/pve-devel/2020-March/042007.html

Changes from v3:
    * make sure the format describes a hash with a 'file' key
      as that's what callers expect

 PVE/QemuServer/Drive.pm | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/PVE/QemuServer/Drive.pm b/PVE/QemuServer/Drive.pm
index e927abf..d412147 100644
--- a/PVE/QemuServer/Drive.pm
+++ b/PVE/QemuServer/Drive.pm
@@ -355,9 +355,20 @@ for (my $i = 0; $i < $MAX_VIRTIO_DISKS; $i++)  {
 
 $drivedesc_hash->{efidisk0} = $efidisk_desc;
 
+my $unused_fmt = {
+    volume => { alias => 'file' },
+    file => {
+       type => 'string',
+       format => 'pve-volume-id',
+       default_key => 1,
+       format_description => 'volume',
+       description => "The drive's backing volume.",
+    },
+};
+
 our $unuseddesc = {
     optional => 1,
-    type => 'string', format => 'pve-volume-id',
+    type => 'string', format => $unused_fmt,
     description => "Reference to unused volumes. This is used internally, and 
should not be modified manually.",
 };
 
@@ -418,7 +429,7 @@ sub parse_drive {
        return undef;
     }
 
-    my $desc = $key =~ /^unused\d+$/ ? $alldrive_fmt
+    my $desc = $key =~ /^unused\d+$/ ? $unuseddesc->{format}
                                      : $drivedesc_hash->{$key}->{format};
     if (!$desc) {
        warn "invalid drive key: $key\n";
-- 
2.20.1


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