dm snapshot: move status to exception store

Let the exception store types print out their status through
the new API, rather than having the snapshot code do it.

Adjust the buffer position to allow for the preceding DMEMIT in the
arguments to type->status().

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

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/md/dm-exception-store.h b/drivers/md/dm-exception-store.h
index 023a707503c4..0a2e6e7f67b3 100644
--- a/drivers/md/dm-exception-store.h
+++ b/drivers/md/dm-exception-store.h
@@ -79,8 +79,9 @@ struct dm_exception_store_type {
          */
         void (*drop_snapshot) (struct dm_exception_store *store);
 
-        int (*status) (struct dm_exception_store *store, status_type_t status,
-                       char *result, unsigned int maxlen);
+        unsigned (*status) (struct dm_exception_store *store,
+                            status_type_t status, char *result,
+                            unsigned maxlen);
 
         /*
          * Return how full the snapshot is.