[PATCH FOLLOW-UP storage 09/14] plugin|lvmplugin: don't allow volume rename if external snapshots exist.

[Alexandre Derumier]

Just to safe, as this is already check higher in the stack.

Technically, it's possible to implement snapshot file renaming,
and update backing_file info with "qemu-img rebase -u".

Signed-off-by: Alexandre Derumier <alexandre.derumier at groupe-cyllene.com>
---
 src/PVE/Storage/LVMPlugin.pm | 6 ++++++
 src/PVE/Storage/Plugin.pm    | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/src/PVE/Storage/LVMPlugin.pm b/src/PVE/Storage/LVMPlugin.pm
index 9aadbc2..8a61bc5 100644
--- a/src/PVE/Storage/LVMPlugin.pm
+++ b/src/PVE/Storage/LVMPlugin.pm
@@ -1233,6 +1233,12 @@ sub rename_volume {
     my (
         undef, $source_image, $source_vmid, $base_name, $base_vmid, undef, $format,
     ) = $class->parse_volname($source_volname);
+
+    if ($format eq 'qcow2') {
+        my $snapshots = $class->volume_snapshot_info($scfg, $storeid, $source_volname);
+        die "we can't rename volume if external snapshot exists" if $snapshots->{current}->{parent};
+    }
+
     $target_volname = $class->find_free_diskname($storeid, $scfg, $target_vmid, $format)
         if !$target_volname;
 
diff --git a/src/PVE/Storage/Plugin.pm b/src/PVE/Storage/Plugin.pm
index 06d258e..8ea62e4 100644
--- a/src/PVE/Storage/Plugin.pm
+++ b/src/PVE/Storage/Plugin.pm
@@ -2175,6 +2175,11 @@ sub rename_volume {
     die "not implemented in storage plugin '$class'\n" if $class->can('api') && $class->api() < 10;
     die "no path found\n" if !$scfg->{path};
 
+    if ($scfg->{'external-snapshots'}) {
+        my $snapshots = $class->volume_snapshot_info($scfg, $storeid, $source_volname);
+        die "we can't rename volume if external snapshot exists" if $snapshots->{current}->{parent};
+    }
+
     my (
         undef, $source_image, $source_vmid, $base_name, $base_vmid, undef, $format,
     ) = $class->parse_volname($source_volname);
-- 
2.39.5