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, 12 insertions, 4 deletions

diff --git a/drivers/md/dm-snap-transient.c b/drivers/md/dm-snap-transient.c
index a883d6e658be..cde5aa558e6d 100644
--- a/drivers/md/dm-snap-transient.c
+++ b/drivers/md/dm-snap-transient.c
@@ -81,11 +81,19 @@ static int transient_ctr(struct dm_exception_store *store,
         return 0;
 }
 
-static int transient_status(struct dm_exception_store *store,
-                            status_type_t status, char *result,
-                            unsigned maxlen)
+static unsigned transient_status(struct dm_exception_store *store,
+                                 status_type_t status, char *result,
+                                 unsigned maxlen)
 {
-        int sz = 0;
+        unsigned sz = 0;
+
+        switch (status) {
+        case STATUSTYPE_INFO:
+                break;
+        case STATUSTYPE_TABLE:
+                DMEMIT(" %s N %llu", store->cow->name,
+                       (unsigned long long)store->chunk_size);
+        }
 
         return sz;
 }