This enables exception store code to handle the message hook in struct
target_type. Exception store implementations can provide useful
features such as providing delta between two snapshots to user space.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
---
drivers/md/dm-snap.h | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h
index a830781..3d43307 100644
--- a/drivers/md/dm-snap.h
+++ b/drivers/md/dm-snap.h
@@ -132,6 +132,13 @@ struct exception_store {
struct dm_snap_exception *(*lookup_completed_exception)
(struct exception_store *store, chunk_t chunk);
+ /*
+ * let exception store code to handle the message hook in
+ * struct target_type.
+ */
+ int (*message)(struct exception_store *store, unsigned argc,
+ char **argv);
+
struct dm_snapshot *snap;
void *context;
};
--
1.5.5.GIT
--
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