dm exception store: move cow pointer

Move COW device from snapshot to exception store.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 59c949b53106..2078b92470a1 100644
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -139,7 +139,7 @@ EXPORT_SYMBOL(dm_exception_store_type_unregister);
 
 int dm_exception_store_create(const char *type_name, struct dm_target *ti,
                               chunk_t chunk_size, chunk_t chunk_mask,
-                              chunk_t chunk_shift,
+                              chunk_t chunk_shift, struct dm_dev *cow,
                               struct dm_exception_store **store)
 {
         int r = 0;
@@ -163,6 +163,8 @@ int dm_exception_store_create(const char *type_name, struct dm_target *ti,
         tmp_store->chunk_mask = chunk_mask;
         tmp_store->chunk_shift = chunk_shift;
 
+        tmp_store->cow = cow;
+
         r = type->ctr(tmp_store, 0, NULL);
         if (r) {
                 put_type(type);