X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/dfe0ec7bfec3fd72cd40d3962e5c8af08d2413d2..a12d68dd2e2646beb4ae68e4dd0825272e279508:/services/fuse/arvados_fuse/__init__.py

diff --git a/services/fuse/arvados_fuse/__init__.py b/services/fuse/arvados_fuse/__init__.py
index 72b0e232d8..1828e150bb 100644
--- a/services/fuse/arvados_fuse/__init__.py
+++ b/services/fuse/arvados_fuse/__init__.py
@@ -367,9 +367,10 @@ class Operations(llfuse.Operations):
         return True
 
     def listen_for_events(self):
-        self.events = arvados.events.subscribe(self._api_client,
-                                 [["event_type", "in", ["create", "update", "delete"]]],
-                                 self.on_event)
+        self.events = arvados.events.subscribe(
+            self._api_client,
+            [["event_type", "in", ["create", "update", "delete"]]],
+            self.on_event)
 
     @catch_exceptions
     def on_event(self, ev):
@@ -510,6 +511,14 @@ class Operations(llfuse.Operations):
         fh = next(self._filehandles_counter)
         self._filehandles[fh] = FileHandle(fh, p)
         self.inodes.touch(p)
+
+        # Normally, we will have received an "update" event if the
+        # parent collection is stale here. However, even if the parent
+        # collection hasn't changed, the manifest might have been
+        # fetched so long ago that the signatures on the data block
+        # locators have expired. Calling checkupdate() on all
+        # ancestors ensures the signatures will be refreshed if
+        # necessary.
         while p.parent_inode in self.inodes:
             if p == self.inodes[p.parent_inode]:
                 break