From 8c858f7eebd6e130d06222286645a8f7c495f17c Mon Sep 17 00:00:00 2001
From: Aaron Lauterer <a.lauterer@proxmox.com>
Date: Fri, 9 Apr 2021 17:10:25 +0200
Subject: [PATCH] fix #3345: zfs: restore container volume to ZFS with size 0

A restore to ZFS for a container which has a volume (rootfs / mount
point) of size 0 failed because the refquota property does not accept
'0k' but wants 'none' in that situation.

Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
 PVE/Storage/ZFSPoolPlugin.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/PVE/Storage/ZFSPoolPlugin.pm b/PVE/Storage/ZFSPoolPlugin.pm
index fe65ae4..2e2abe3 100644
--- a/PVE/Storage/ZFSPoolPlugin.pm
+++ b/PVE/Storage/ZFSPoolPlugin.pm
@@ -334,9 +334,10 @@ sub zfs_create_subvol {
     my ($class, $scfg, $volname, $size) = @_;
 
     my $dataset = "$scfg->{pool}/$volname";
+    my $quota = $size ? "${size}k" : "none";
 
     my $cmd = ['create', '-o', 'acltype=posixacl', '-o', 'xattr=sa',
-	       '-o', "refquota=${size}k", $dataset];
+	       '-o', "refquota=${quota}", $dataset];
 
     $class->zfs_request($scfg, undef, @$cmd);
 }