X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/27616fe74103c079a84ac34b2adb83f1952c5772..8fd360faf91921c557f44f079b127a4fa5830486:/services/fuse/arvados_fuse/fresh.py

diff --git a/services/fuse/arvados_fuse/fresh.py b/services/fuse/arvados_fuse/fresh.py
index 6ecf35c612..2e7a2a8182 100644
--- a/services/fuse/arvados_fuse/fresh.py
+++ b/services/fuse/arvados_fuse/fresh.py
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 import time
 import ciso8601
 import calendar
@@ -8,7 +12,7 @@ def convertTime(t):
     if not t:
         return 0
     try:
-        return calendar.timegm(ciso8601.parse_datetime_unaware(t).timetuple())
+        return calendar.timegm(ciso8601.parse_datetime_as_naive(t).timetuple())
     except (TypeError, ValueError):
         return 0
 
@@ -55,6 +59,10 @@ class FreshBase(object):
     * Clear the object contents (invalidates the object)
 
     """
+
+    __slots__ = ("_stale", "_poll", "_last_update", "_atime", "_poll_time", "use_count",
+                 "ref_count", "dead", "cache_size", "cache_uuid", "allow_attr_cache")
+
     def __init__(self):
         self._stale = True
         self._poll = False
@@ -64,14 +72,20 @@ class FreshBase(object):
         self.use_count = 0
         self.ref_count = 0
         self.dead = False
-        self.cache_priority = None
         self.cache_size = 0
         self.cache_uuid = None
 
-    # Mark the value as stale
+        # Can the kernel cache attributes?
+        self.allow_attr_cache = True
+
     def invalidate(self):
+        """Indicate that object contents should be refreshed from source."""
         self._stale = True
 
+    def kernel_invalidate(self):
+        """Indicate that an invalidation for this object should be sent to the kernel."""
+        pass
+
     # Test if the entries dict is stale.
     def stale(self):
         if self._stale:
@@ -90,7 +104,7 @@ class FreshBase(object):
     def persisted(self):
         return False
 
-    def clear(self, force=False):
+    def clear(self):
         pass
 
     def in_use(self):
@@ -110,8 +124,36 @@ class FreshBase(object):
         self.ref_count -= n
         return self.ref_count
 
+    def has_ref(self, only_children):
+        """Determine if there are any kernel references to this
+        object or its children.
+
+        If only_children is True, ignore refcount of self and only consider
+        children.
+        """
+        if only_children:
+            return False
+        else:
+            return self.ref_count > 0
+
     def objsize(self):
         return 0
 
     def uuid(self):
         return None
+
+    def finalize(self):
+        pass
+
+    def child_event(self, ev):
+        pass
+
+    def time_to_next_poll(self):
+        if self._poll:
+            t = (self._last_update + self._poll_time) - self._atime
+            if t < 0:
+                return 0
+            else:
+                return t
+        else:
+            return self._poll_time