[PATCH storage 3/3] zfspool plugin: clone: fix linked clone of container subvol with refquota=none

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

ZFS does not accept the value 0 for the refquota property, but
requires 'none' to be used instead. The refquota is queried with '-p'
to get the exact parsable value and there, 'none' is returned as 0. It
needs to be converted back to 'none' for the 'zfs clone' invocation.

Fixes: 851658c ("Change zfs path when link clone are used")
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 src/PVE/Storage/ZFSPoolPlugin.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/PVE/Storage/ZFSPoolPlugin.pm b/src/PVE/Storage/ZFSPoolPlugin.pm
index c463112..418a65b 100644
--- a/src/PVE/Storage/ZFSPoolPlugin.pm
+++ b/src/PVE/Storage/ZFSPoolPlugin.pm
@@ -726,6 +726,7 @@ sub clone_image {
 
     if ($format eq 'subvol') {
         my $refquota = $class->zfs_get_properties($scfg, 'refquota', "$scfg->{pool}/$basename");
+        $refquota = 'none' if $refquota == 0; # zfs does not accept 0 for refquota property
         $class->zfs_request(
             $scfg,
             undef,
-- 
2.47.3