From 32f55f8c0d7f7d7137cebdcc4315223225488937 Mon Sep 17 00:00:00 2001
From: Fiona Ebner <f.ebner@proxmox.com>
Date: Fri, 21 Feb 2025 16:41:11 +0100
Subject: [PATCH] btrfs: volume export: fix command for incremental stream

The subvolume itself cannot be included if there is a base snapshot
or the command would fail with e.g.

> ERROR: subvolume /mnt/btrfs/images/400/vm-400-disk-0 is not read-only

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

diff --git a/src/PVE/Storage/BTRFSPlugin.pm b/src/PVE/Storage/BTRFSPlugin.pm
index 651806d..5611c1d 100644
--- a/src/PVE/Storage/BTRFSPlugin.pm
+++ b/src/PVE/Storage/BTRFSPlugin.pm
@@ -780,7 +780,8 @@ sub volume_export {
     }
     push @$cmd, '--';
     if (ref($with_snapshots) eq 'ARRAY') {
-	push @$cmd, (map { "$path\@$_" } ($with_snapshots // [])->@*), $path;
+	push @$cmd, (map { "$path\@$_" } ($with_snapshots // [])->@*);
+	push @$cmd, $path if !defined($base_snapshot);
     } else {
 	foreach_snapshot_of_subvol($path, sub {
 	    my ($snap_name) = @_;