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...'

1 files changed, 9 insertions, 4 deletions

diff --git a/tools/pvmove.c b/tools/pvmove.c
index 2a26a1036..84efdf4e7 100644
--- 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);