Pass in fqsn from fsp admin apis

piker/ui/_fsp.py

@@ -386,6 +386,7 @@ class FspAdmin:
         portal: tractor.Portal,
         complete: trio.Event,
         started: trio.Event,
+        fqsn: str,
         dst_shm: ShmArray,
         conf: dict,
         target: Fsp,
@@ -397,7 +398,6 @@ class FspAdmin:
         cluster and sleeps until signalled to exit.
 
         '''
-        brokername, sym = self.linked.symbol.front_feed()
         ns_path = str(target.ns_path)
         async with (
             portal.open_context(
@@ -406,8 +406,7 @@ class FspAdmin:
                 cascade,
 
                 # data feed key
-                brokername=brokername,
-                symbol=sym,
+                fqsn=fqsn,
 
                 # mems
                 src_shm_token=self.src_shm.token,
@@ -429,7 +428,7 @@ class FspAdmin:
         ):
             # register output data
             self._registry[
-                (brokername, sym, ns_path)
+                (fqsn, ns_path)
             ] = (
                 stream,
                 dst_shm,
@@ -452,11 +451,11 @@ class FspAdmin:
 
     ) -> (ShmArray, trio.Event):
 
-        fqsn = self.linked.symbol.front_feed()
+        fqsn = self.linked.symbol.front_fqsn()
 
         # allocate an output shm array
         key, dst_shm, opened = maybe_mk_fsp_shm(
-            '.'.join(fqsn),
+            fqsn,
             target=target,
             readonly=True,
         )
@@ -477,6 +476,7 @@ class FspAdmin:
             portal,
             complete,
             started,
+            fqsn,
             dst_shm,
             conf,
             target,