[pve-devel] [PATCH qemu-server] migrate: use correct target storage id for checks

[Fabian Ebner]

The '--targetstorage' parameter does not apply to shared storages.

Example for a problem solved with the enabled check: Given a VM with
images only on a shared storage 'storeA', not available on the target
node (i.e. restricted by the nodes property). Then using
'--targetstorage storeB' would make offline migration suddenly
"work", but of course the disks would not be accessible and then
trying to migrate back would fail...

Example for a problem solved with the content type check: if a
VM had a shared ISO image, and there was a '--targetstorage storeA'
option, availablity of the 'iso' content type is checked for
'storeA', which is wrong as the ISO would not be moved to that
storage.

Signed-off-by: Fabian Ebner <f.ebner at proxmox.com>
---

The first kind of issue is also present in stable-6.

 PVE/QemuMigrate.pm | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm
index 0b41db7..7047d02 100644
--- a/PVE/QemuMigrate.pm
+++ b/PVE/QemuMigrate.pm
@@ -337,9 +337,15 @@ sub prepare {
 	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid, 1);
 
 	# check if storage is available on both nodes
-	my $targetsid = PVE::QemuServer::map_storage($self->{opts}->{storagemap}, $sid);
-
 	my $scfg = PVE::Storage::storage_check_enabled($storecfg, $sid);
+
+	my $targetsid;
+	if ($scfg->{shared}) {
+	    $targetsid = $sid;
+	} else {
+	    $targetsid = PVE::QemuServer::map_storage($self->{opts}->{storagemap}, $sid);
+	}
+
 	my $target_scfg = PVE::Storage::storage_check_enabled(
 	    $storecfg,
 	    $targetsid,
@@ -472,9 +478,16 @@ sub scan_local_volumes {
 
 	    my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
 
-	    my $targetsid = PVE::QemuServer::map_storage($self->{opts}->{storagemap}, $sid);
 	    # check if storage is available on both nodes
 	    my $scfg = PVE::Storage::storage_check_enabled($storecfg, $sid);
+
+	    my $targetsid;
+	    if ($scfg->{shared}) {
+		$targetsid = $sid;
+	    } else {
+		$targetsid = PVE::QemuServer::map_storage($self->{opts}->{storagemap}, $sid);
+	    }
+
 	    PVE::Storage::storage_check_enabled($storecfg, $targetsid, $self->{node});
 
 	    return if $scfg->{shared};
-- 
2.30.2