[pve-devel] [PATCH v2 qemu-server] Fix block_resize qmp call for block devices

[Dmitry Petuhov]

Set zero size for backing block devices in qmp call. In that case qemu
sets size of device in guest to current size of backing device, which
was resized earlier. Otherwise, any non-zero value causes error here.

---
 PVE/QemuServer.pm | 6 ++++++
 1 file changed, 6 insertions(+)

v2: fix typo -d instead of -b
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index bc26da2..3f53ac1 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -3984,6 +3984,12 @@ sub qemu_block_resize {
 
     return if !$running;
 
+    my $path = PVE::Storage::path($cfg, $volid, undef);
+    if ($path =~ m|^/|) {
+        $path = abs_path($path);
+        $size = 0 if -b $path;
+    }
+
     vm_mon_cmd($vmid, "block_resize", device => $deviceid, size => int($size));
 
 }
-- 
2.1.4