From 65d572d651ae75662522bcd860b766fda80b840e Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Fri, 15 Aug 2008 10:17:35 +0900 Subject: [PATCH 3/9] dm snapshot: add message hook to struct exception_store 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 --- 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 d73d2c6..c4f1df4 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