X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/060d38d627bd1e51dd2b3c6e7de9af6aa7d7b6f3..5eacdd4d7ad270ac40448e1c5fdb29c9ae65e7fd:/services/fuse/arvados_fuse/fusefile.py

diff --git a/services/fuse/arvados_fuse/fusefile.py b/services/fuse/arvados_fuse/fusefile.py
index 8189a19742..116b5462b6 100644
--- a/services/fuse/arvados_fuse/fusefile.py
+++ b/services/fuse/arvados_fuse/fusefile.py
@@ -2,19 +2,23 @@
 #
 # SPDX-License-Identifier: AGPL-3.0
 
+from __future__ import absolute_import
+from builtins import bytes
 import json
 import llfuse
 import logging
 import re
 import time
 
-from fresh import FreshBase, convertTime
+from .fresh import FreshBase, convertTime
 
 _logger = logging.getLogger('arvados.arvados_fuse')
 
 class File(FreshBase):
     """Base for file objects."""
 
+    __slots__ = ("inode", "parent_inode", "_mtime")
+
     def __init__(self, parent_inode, _mtime=0):
         super(File, self).__init__()
         self.inode = None
@@ -46,6 +50,8 @@ class File(FreshBase):
 class FuseArvadosFile(File):
     """Wraps a ArvadosFile."""
 
+    __slots__ = ('arvfile',)
+
     def __init__(self, parent_inode, arvfile, _mtime):
         super(FuseArvadosFile, self).__init__(parent_inode, _mtime)
         self.arvfile = arvfile
@@ -84,7 +90,7 @@ class StringFile(File):
         return len(self.contents)
 
     def readfrom(self, off, size, num_retries=0):
-        return self.contents[off:(off+size)]
+        return bytes(self.contents[off:(off+size)], encoding='utf-8')
 
 
 class ObjectFile(StringFile):
@@ -122,12 +128,11 @@ class FuncToJSONFile(StringFile):
         super(FuncToJSONFile, self).__init__(parent_inode, "", 0)
         self.func = func
 
-        # invalidate_inode() and invalidate_entry() are asynchronous
-        # with no callback to wait for. In order to guarantee
-        # userspace programs don't get stale data that was generated
-        # before the last invalidate(), we must disallow dirent
+        # invalidate_inode() is asynchronous with no callback to wait for. In
+        # order to guarantee userspace programs don't get stale data that was
+        # generated before the last invalidate(), we must disallow inode
         # caching entirely.
-        self.allow_dirent_cache = False
+        self.allow_attr_cache = False
 
     def size(self):
         self._update()