dm exception store: separate type from instance
Introduce struct dm_exception_store_type.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/dm-exception-store.h b/drivers/md/dm-exception-store.h
index bb9f33d..aed1f11 100644
--- a/drivers/md/dm-exception-store.h
+++ b/drivers/md/dm-exception-store.h
@@ -37,11 +37,15 @@
* Abstraction to handle the meta/layout of exception stores (the
* COW device).
*/
-struct dm_exception_store {
+struct dm_exception_store;
+struct dm_exception_store_type {
+ int (*ctr) (struct dm_exception_store *store,
+ unsigned argc, char **argv);
+
/*
* Destroys this object when you've finished with it.
*/
- void (*destroy) (struct dm_exception_store *store);
+ void (*dtr) (struct dm_exception_store *store);
/*
* The target shouldn't read the COW device until this is
@@ -81,8 +85,13 @@
void (*fraction_full) (struct dm_exception_store *store,
sector_t *numerator,
sector_t *denominator);
+};
+
+struct dm_exception_store {
+ struct dm_exception_store_type type;
struct dm_snapshot *snap;
+
void *context;
};