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, 5 insertions, 5 deletions

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index c3c58159b6e8..505afac9976f 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -189,7 +189,7 @@ static void do_metadata(struct work_struct *work)
 static int chunk_io(struct pstore *ps, chunk_t chunk, int rw, int metadata)
 {
         struct dm_io_region where = {
-                .bdev = ps->snap->cow->bdev,
+                .bdev = ps->snap->store->cow->bdev,
                 .sector = ps->snap->store->chunk_size * chunk,
                 .count = ps->snap->store->chunk_size,
         };
@@ -253,7 +253,7 @@ static void zero_memory_area(struct pstore *ps)
 static int zero_disk_area(struct pstore *ps, chunk_t area)
 {
         struct dm_io_region where = {
-                .bdev = ps->snap->cow->bdev,
+                .bdev = ps->snap->store->cow->bdev,
                 .sector = ps->snap->store->chunk_size * area_location(ps, area),
                 .count = ps->snap->store->chunk_size,
         };
@@ -280,7 +280,7 @@ static int read_header(struct pstore *ps, int *new_snapshot)
          */
         if (!ps->snap->store->chunk_size) {
                 ps->snap->store->chunk_size = max(DM_CHUNK_SIZE_DEFAULT_SECTORS,
-                    bdev_hardsect_size(ps->snap->cow->bdev) >> 9);
+                    bdev_hardsect_size(ps->snap->store->cow->bdev) >> 9);
                 ps->snap->store->chunk_mask = ps->snap->store->chunk_size - 1;
                 ps->snap->store->chunk_shift = ffs(ps->snap->store->chunk_size)
                                                - 1;
@@ -476,7 +476,7 @@ static void persistent_fraction_full(struct dm_exception_store *store,
                                      sector_t *numerator, sector_t *denominator)
 {
         *numerator = get_info(store)->next_free * store->chunk_size;
-        *denominator = get_dev_size(store->snap->cow->bdev);
+        *denominator = get_dev_size(store->cow->bdev);
 }
 
 static void persistent_dtr(struct dm_exception_store *store)
@@ -565,7 +565,7 @@ static int persistent_prepare_exception(struct dm_exception_store *store,
         struct pstore *ps = get_info(store);
         uint32_t stride;
         chunk_t next_free;
-        sector_t size = get_dev_size(store->snap->cow->bdev);
+        sector_t size = get_dev_size(store->cow->bdev);
 
         /* Is there enough room ? */
         if (size < ((ps->next_free + 1) * store->chunk_size))