dm snapshot: split out exception store implementations

Move the existing snapshot exception store implementations out into
separate files.  Later patches will place these behind a new
interface in preparation for alternative implementations.

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

1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 81f03a0e7838..018b567fc758 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1406,6 +1406,12 @@ static int __init dm_snapshot_init(void)
 {
         int r;
 
+        r = dm_exception_store_init();
+        if (r) {
+                DMERR("Failed to initialize exception stores");
+                return r;
+        }
+
         r = dm_register_target(&snapshot_target);
         if (r) {
                 DMERR("snapshot target register failed %d", r);
@@ -1454,17 +1460,17 @@ static int __init dm_snapshot_init(void)
 
         return 0;
 
-      bad_pending_pool:
+bad_pending_pool:
         kmem_cache_destroy(tracked_chunk_cache);
-      bad5:
+bad5:
         kmem_cache_destroy(pending_cache);
-      bad4:
+bad4:
         kmem_cache_destroy(exception_cache);
-      bad3:
+bad3:
         exit_origin_hash();
-      bad2:
+bad2:
         dm_unregister_target(&origin_target);
-      bad1:
+bad1:
         dm_unregister_target(&snapshot_target);
         return r;
 }
@@ -1480,6 +1486,8 @@ static void __exit dm_snapshot_exit(void)
         kmem_cache_destroy(pending_cache);
         kmem_cache_destroy(exception_cache);
         kmem_cache_destroy(tracked_chunk_cache);
+
+        dm_exception_store_exit();
 }
 
 /* Module hooks */