ceph-disk: is_held must ignore multipath devices

Always return an empty list when is_held is called on a multipath
device.

The dmcrypt logic base decisions depending on the holders/slaves
relationship. Such relationships can also exists for multipath devices
but do not have the same semantic.

http://tracker.ceph.com/issues/11881 Fixes: #11881

Signed-off-by: Loic Dachary <ldachary@redhat.com>

diff --git a/src/ceph-disk b/src/ceph-disk
index 7226dd51962d2a39629336900eda7fbdb131df71..fd0ca4822d933621f8f555386b94efd92d48bd17 100755 (executable)
--- a/src/ceph-disk
+++ b/src/ceph-disk
@@ -633,6 +633,9 @@ def is_held(dev):
     Check if a device is held by another device (e.g., a dm-crypt mapping)
     """
     assert os.path.exists(dev)
+    if is_mpath(dev):
+        return []
+
     dev = os.path.realpath(dev)
     base = get_dev_name(dev)