diff options
Diffstat (limited to 'drivers/md/dm-exception-store.h')
| -rw-r--r-- | drivers/md/dm-exception-store.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/md/dm-exception-store.h b/drivers/md/dm-exception-store.h index bb8874653de1..c53e08935b42 100644 --- a/drivers/md/dm-exception-store.h +++ b/drivers/md/dm-exception-store.h @@ -75,6 +75,23 @@ struct dm_exception_store_type { void *callback_context); /* + * Returns 0 if the exception store is empty. + * + * If there are exceptions still to be merged, sets + * *last_old_chunk and *last_new_chunk to the most recent + * still-to-be-merged chunk and returns the number of + * consecutive previous ones. + */ + int (*prepare_merge) (struct dm_exception_store *store, + chunk_t *last_old_chunk, chunk_t *last_new_chunk); + + /* + * Clear the last n exceptions. + * nr_merged must be <= the value returned by prepare_merge. + */ + int (*commit_merge) (struct dm_exception_store *store, int nr_merged); + + /* * The snapshot is invalid, note this in the metadata. */ void (*drop_snapshot) (struct dm_exception_store *store); |