449 					struct dm_snapshot **snap_src,  in __find_snapshots_sharing_cow()  argument
473 			if (snap_src)  in __find_snapshots_sharing_cow()
474 				*snap_src = s;  in __find_snapshots_sharing_cow()
491 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in __validate_exception_handover()  local
495 	if ((__find_snapshots_sharing_cow(snap, &snap_src, &snap_dest,  in __validate_exception_handover()
507 	if (!snap_src)  in __validate_exception_handover()
524 	if (!snap_src->store->type->prepare_merge ||  in __validate_exception_handover()
525 	    !snap_src->store->type->commit_merge) {  in __validate_exception_handover()
1453 static void __handover_exceptions(struct dm_snapshot *snap_src,  in __handover_exceptions()  argument
1465 	snap_dest->complete = snap_src->complete;  in __handover_exceptions()
1466 	snap_src->complete = u.table_swap;  in __handover_exceptions()
1469 	snap_dest->store = snap_src->store;  in __handover_exceptions()
1471 	snap_src->store = u.store_swap;  in __handover_exceptions()
1474 	snap_src->store->snap = snap_src;  in __handover_exceptions()
1477 	snap_dest->valid = snap_src->valid;  in __handover_exceptions()
1478 	snap_dest->snapshot_overflowed = snap_src->snapshot_overflowed;  in __handover_exceptions()
1483 	snap_src->valid = 0;  in __handover_exceptions()
1492 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_dtr()  local
1496 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_dtr()
1497 	if (snap_src && snap_dest && (s == snap_src)) {  in snapshot_dtr()
2223 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_preresume()  local
2226 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_preresume()
2227 	if (snap_src && snap_dest) {  in snapshot_preresume()
2228 		down_read(&snap_src->lock);  in snapshot_preresume()
2229 		if (s == snap_src) {  in snapshot_preresume()
2233 		} else if (!dm_suspended(snap_src->ti)) {  in snapshot_preresume()
2238 		up_read(&snap_src->lock);  in snapshot_preresume()
2248 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL, *snap_merging = NULL;  in snapshot_resume()  local
2282 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_resume()
2283 	if (snap_src && snap_dest) {  in snapshot_resume()
2284 		down_write(&snap_src->lock);  in snapshot_resume()
2286 		__handover_exceptions(snap_src, snap_dest);  in snapshot_resume()
2288 		up_write(&snap_src->lock);  in snapshot_resume()
2415 		struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_io_hints()  local
2419 		(void) __find_snapshots_sharing_cow(snap, &snap_src, &snap_dest, NULL);  in snapshot_io_hints()
2420 		if (snap_src && snap_dest)  in snapshot_io_hints()
2421 			snap = snap_src;  in snapshot_io_hints()