writecache: don't pvmove device used by writecache

The existing check didn't cover the unusual case where the
cachevol exists on the same device as the origin LV.

(cherry picked from commit e7f107c24666c8577f30e530b74f1ce0347e459b)
(cherry picked from commit f15472d5aacfa8f62500edf398bc9d368d64a33f)

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/pvmove.c b/tools/pvmove.c
index da635a662..bb372f7dc 100644
--- a/tools/pvmove.c
+++ b/tools/pvmove.c
@@ -387,6 +387,15 @@ static struct logical_volume *_set_up_pvmove_lv(struct cmd_context *cmd,
 			return NULL;
 		}
 
+		if (lv_is_writecache(lv)) {
+			struct logical_volume *lv_cachevol = first_seg(lv)->writecache;
+			if (lv_is_on_pvs(lv_cachevol, source_pvl)) {
+				log_error("Unable to move device used for writecache cachevol %s.", display_lvname(lv_cachevol));
+				return NULL;
+			}
+
+		}
+
 		if (lv_is_raid(lv) && lv_raid_has_integrity(lv)) {
 			log_error("Unable to pvmove device used for raid with integrity.");
 			return NULL;