pvmove: support properly subLV locking

Since we support snapshot of mirrors, we do need to properly check
for stacked lock holder - fixes problem of pvmove in cluster
with mirrors under snapshot.

WHATS_NEW for this patch goes with 'Restore pvmove support...'

diff --git a/tools/pvmove.c b/tools/pvmove.c
index 2a26a1036579f627ebd2bc0acaa8b4fe08957b9f..84efdf4e70feb6a7dc10606d534ea266c0eafece 100644 (file)
--- a/tools/pvmove.c
+++ b/tools/pvmove.c
@@ -393,10 +393,15 @@ static struct logical_volume *_set_up_pvmove_lv(struct cmd_context *cmd,
                }
 
                seg = first_seg(lv);
-
-               /* Presence of exclusive LV decides whether pvmove must be also exclusive */
-               if ((seg_only_exclusive(seg) || lv_is_origin(lv) || lv_is_cow(lv)))
-                       needs_exclusive = 1;
+               if (!needs_exclusive) {
+                       /* Presence of exclusive LV decides whether pvmove must be also exclusive */
+                       if (!seg_only_exclusive(seg)) {
+                               holder = lv_lock_holder(lv);
+                               if (seg_only_exclusive(first_seg(holder)) || lv_is_origin(holder) || lv_is_cow(holder))
+                                       needs_exclusive = 1;
+                       } else
+                               needs_exclusive = 1;
+               }
 
                if (seg_is_raid(seg) || seg_is_mirrored(seg)) {
                        dm_list_init(&trim_list);