102 	struct dm_exception_store *store;  member
171 	len = ps->store->chunk_size << SECTOR_SHIFT;  in alloc_area()
232 		.bdev = dm_snap_cow(ps->store->snap)->bdev,  in chunk_io()
233 		.sector = ps->store->chunk_size * chunk,  in chunk_io()
234 		.count = ps->store->chunk_size,  in chunk_io()
299 	memset(ps->area, 0, ps->store->chunk_size << SECTOR_SHIFT);  in zero_memory_area()
319 	if (!ps->store->chunk_size) {  in read_header()
320 		ps->store->chunk_size = max(DM_CHUNK_SIZE_DEFAULT_SECTORS,  in read_header()
321 		    bdev_logical_block_size(dm_snap_cow(ps->store->snap)->  in read_header()
323 		ps->store->chunk_mask = ps->store->chunk_size - 1;  in read_header()
324 		ps->store->chunk_shift = ffs(ps->store->chunk_size) - 1;  in read_header()
358 	if (ps->store->chunk_size == chunk_size)  in read_header()
364 		       chunk_size, ps->store->chunk_size);  in read_header()
369 	r = dm_exception_store_set_chunk_size(ps->store, chunk_size,  in read_header()
389 	memset(ps->header_area, 0, ps->store->chunk_size << SECTOR_SHIFT);  in write_header()
395 	dh->chunk_size = cpu_to_le32(ps->store->chunk_size);  in write_header()
499 	client = dm_bufio_client_create(dm_snap_cow(ps->store->snap)->bdev,  in read_exceptions()
500 					ps->store->chunk_size << SECTOR_SHIFT,  in read_exceptions()
545 			memcpy(ps->area, area, ps->store->chunk_size << SECTOR_SHIFT);  in read_exceptions()
567 static struct pstore *get_info(struct dm_exception_store *store)  in get_info()  argument
569 	return (struct pstore *) store->context;  in get_info()
572 static void persistent_usage(struct dm_exception_store *store,  in persistent_usage()  argument
577 	struct pstore *ps = get_info(store);  in persistent_usage()
579 	*sectors_allocated = ps->next_free * store->chunk_size;  in persistent_usage()
580 	*total_sectors = get_dev_size(dm_snap_cow(store->snap)->bdev);  in persistent_usage()
588 			    store->chunk_size;  in persistent_usage()
591 static void persistent_dtr(struct dm_exception_store *store)  in persistent_dtr()  argument
593 	struct pstore *ps = get_info(store);  in persistent_dtr()
608 static int persistent_read_metadata(struct dm_exception_store *store,  in persistent_read_metadata()  argument
614 	struct pstore *ps = get_info(store);  in persistent_read_metadata()
626 	ps->exceptions_per_area = (ps->store->chunk_size << SECTOR_SHIFT) /  in persistent_read_metadata()
673 static int persistent_prepare_exception(struct dm_exception_store *store,  in persistent_prepare_exception()  argument
676 	struct pstore *ps = get_info(store);  in persistent_prepare_exception()
677 	sector_t size = get_dev_size(dm_snap_cow(store->snap)->bdev);  in persistent_prepare_exception()
680 	if (size < ((ps->next_free + 1) * store->chunk_size))  in persistent_prepare_exception()
696 static void persistent_commit_exception(struct dm_exception_store *store,  in persistent_commit_exception()  argument
702 	struct pstore *ps = get_info(store);  in persistent_commit_exception()
761 static int persistent_prepare_merge(struct dm_exception_store *store,  in persistent_prepare_merge()  argument
765 	struct pstore *ps = get_info(store);  in persistent_prepare_merge()
807 static int persistent_commit_merge(struct dm_exception_store *store,  in persistent_commit_merge()  argument
811 	struct pstore *ps = get_info(store);  in persistent_commit_merge()
840 static void persistent_drop_snapshot(struct dm_exception_store *store)  in persistent_drop_snapshot()  argument
842 	struct pstore *ps = get_info(store);  in persistent_drop_snapshot()
849 static int persistent_ctr(struct dm_exception_store *store,  in persistent_ctr()  argument
859 	ps->store = store;  in persistent_ctr()
879 	store->context = ps;  in persistent_ctr()
884 static unsigned persistent_status(struct dm_exception_store *store,  in persistent_status()  argument
894 		DMEMIT(" P %llu", (unsigned long long)store->chunk_size);  in persistent_status()