[PATCH storage v3 02/11] plugin: volume snapshot info: also return virtual size

[Fiona Ebner <f.ebner@proxmox.com>]

For LVM storages using 'snapshot-as-volume-chain', it's necessary to
check that the size for the LV of the target snapshot volume is large
enough before doing a commit operation. Returning the virtual size of
the volume at the time the snapshot was taken in the result of
volume_snapshot_info() makes this easy to check.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 src/PVE/Storage/LVMPlugin.pm | 1 +
 src/PVE/Storage/Plugin.pm    | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/src/PVE/Storage/LVMPlugin.pm b/src/PVE/Storage/LVMPlugin.pm
index 443d292..6c5c96c 100644
--- a/src/PVE/Storage/LVMPlugin.pm
+++ b/src/PVE/Storage/LVMPlugin.pm
@@ -924,6 +924,7 @@ sub volume_snapshot_info {
         $info->{$snapname}->{file} = $snapfile;
         $info->{$snapname}->{volname} = "$snapvolname";
         $info->{$snapname}->{volid} = "$storeid:$snapvolname";
+        $info->{$snapname}->{'virtual-size'} = $snap->{'virtual-size'};
 
         my $parentfile = $snap->{'backing-filename'};
         if ($parentfile) {
diff --git a/src/PVE/Storage/Plugin.pm b/src/PVE/Storage/Plugin.pm
index 1c5b0fd..b0ee347 100644
--- a/src/PVE/Storage/Plugin.pm
+++ b/src/PVE/Storage/Plugin.pm
@@ -1834,6 +1834,8 @@ Required values are:
 
 =item C<volid>: The volume ID of the external snapshot volume.
 
+=item C<virtual-size>: The virtual size of the volume recorded by the snapshot.
+
 =item C<child>: The name of the child snapshot in the volume chain. Not set if there is no child.
 
 =item C<parent>: The name of the parent snapshot in the volume chain. Not set if there is no parent.
@@ -1913,6 +1915,7 @@ sub volume_snapshot_info {
             $info->{$snapname}->{file} = $snapfile;
             $info->{$snapname}->{volname} = "$snapvolname";
             $info->{$snapname}->{volid} = "$storeid:$snapvolname";
+            $info->{$snapname}->{'virtual-size'} = $snap->{'virtual-size'};
             $info->{$snapname}->{ext} = 1;
 
             my $parentfile = $snap->{'backing-filename'};
-- 
2.47.3