def __init__(self, cap, min_entries=4):
self._entries = collections.OrderedDict()
self._by_uuid = {}
- self._counter = itertools.count(0)
self.cap = cap
self._total = 0
self.min_entries = min_entries
return self._total
def _remove(self, obj, clear):
- if clear and not obj.clear():
- _logger.debug("InodeCache could not clear %i in_use %s", obj.inode, obj.in_use())
- return False
+ if clear:
+ if obj.in_use():
+ _logger.debug("InodeCache cannot clear inode %i, in use", obj.inode)
+ return
+ if obj.has_ref(True):
+ obj.kernel_invalidate()
+ _logger.debug("InodeCache sent kernel invalidate inode %i", obj.inode)
+ return
+ obj.clear()
+
+ # The llfuse lock is released in del_entry(), which is called by
+ # Directory.clear(). While the llfuse lock is released, it can happen
+ # that a reentrant call removes this entry before this call gets to it.
+ # Ensure that the entry is still valid before trying to remove it.
+ if obj.inode not in self._entries:
+ return
+
self._total -= obj.cache_size
- del self._entries[obj.cache_priority]
+ del self._entries[obj.inode]
if obj.cache_uuid:
self._by_uuid[obj.cache_uuid].remove(obj)
if not self._by_uuid[obj.cache_uuid]:
del self._by_uuid[obj.cache_uuid]
obj.cache_uuid = None
if clear:
- _logger.debug("InodeCache cleared %i total now %i", obj.inode, self._total)
- return True
+ _logger.debug("InodeCache cleared inode %i total now %i", obj.inode, self._total)
def cap_cache(self):
if self._total > self.cap:
- for key in list(self._entries.keys()):
+ for ent in self._entries.values():
if self._total < self.cap or len(self._entries) < self.min_entries:
break
- self._remove(self._entries[key], True)
+ self._remove(ent, True)
def manage(self, obj):
if obj.persisted():
- obj.cache_priority = next(self._counter)
obj.cache_size = obj.objsize()
- self._entries[obj.cache_priority] = obj
+ self._entries[obj.inode] = obj
obj.cache_uuid = obj.uuid()
if obj.cache_uuid:
if obj.cache_uuid not in self._by_uuid:
if obj not in self._by_uuid[obj.cache_uuid]:
self._by_uuid[obj.cache_uuid].append(obj)
self._total += obj.objsize()
- _logger.debug("InodeCache touched %i (size %i) (uuid %s) total now %i", obj.inode, obj.objsize(), obj.cache_uuid, self._total)
+ _logger.debug("InodeCache touched inode %i (size %i) (uuid %s) total now %i", obj.inode, obj.objsize(), obj.cache_uuid, self._total)
self.cap_cache()
- else:
- obj.cache_priority = None
def touch(self, obj):
if obj.persisted():
- if obj.cache_priority in self._entries:
+ if obj.inode in self._entries:
self._remove(obj, False)
self.manage(obj)
def unmanage(self, obj):
- if obj.persisted() and obj.cache_priority in self._entries:
+ if obj.persisted() and obj.inode in self._entries:
self._remove(obj, True)
def find_by_uuid(self, uuid):
llfuse.invalidate_inode(inode)
def invalidate_entry(self, inode, name):
- llfuse.invalidate_entry(inode, name)
+ llfuse.invalidate_entry(inode, name.encode(self.encoding))
def clear(self):
self.inode_cache.clear()
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):
entry = llfuse.EntryAttributes()
entry.st_ino = inode
entry.generation = 0
- entry.entry_timeout = 60
- entry.attr_timeout = 60
+ entry.entry_timeout = 60 if e.allow_dirent_cache else 0
+ entry.attr_timeout = 60 if e.allow_attr_cache else 0
entry.st_mode = stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH
if isinstance(e, Directory):
else:
if parent_inode in self.inodes:
p = self.inodes[parent_inode]
+ self.inodes.touch(p)
if name == '..':
inode = p.parent_inode
elif isinstance(p, Directory) and name in p:
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
+ p = self.inodes[p.parent_inode]
+ self.inodes.touch(p)
+ p.checkupdate()
+
+ _logger.debug("arv-mount open inode %i flags %x fh %i", inode, flags, fh)
+
return fh
@catch_exceptions
def read(self, fh, off, size):
- _logger.debug("arv-mount read %i %i %i", fh, off, size)
+ _logger.debug("arv-mount read fh %i off %i size %i", fh, off, size)
self.read_ops_counter.add(1)
if fh in self._filehandles:
else:
raise llfuse.FUSEError(errno.EBADF)
- _logger.debug("arv-mount handle.dirobj %s", handle.obj)
-
e = off
while e < len(handle.entries):
if handle.entries[e][1].inode in self.inodes:
@catch_exceptions
def create(self, inode_parent, name, mode, flags, ctx):
- _logger.debug("arv-mount create: %i '%s' %o", inode_parent, name, mode)
+ _logger.debug("arv-mount create: parent_inode %i '%s' %o", inode_parent, name, mode)
p = self._check_writable(inode_parent)
p.create(name)
@catch_exceptions
def mkdir(self, inode_parent, name, mode, ctx):
- _logger.debug("arv-mount mkdir: %i '%s' %o", inode_parent, name, mode)
+ _logger.debug("arv-mount mkdir: parent_inode %i '%s' %o", inode_parent, name, mode)
p = self._check_writable(inode_parent)
p.mkdir(name)
@catch_exceptions
def unlink(self, inode_parent, name):
- _logger.debug("arv-mount unlink: %i '%s'", inode_parent, name)
+ _logger.debug("arv-mount unlink: parent_inode %i '%s'", inode_parent, name)
p = self._check_writable(inode_parent)
p.unlink(name)
@catch_exceptions
def rmdir(self, inode_parent, name):
- _logger.debug("arv-mount rmdir: %i '%s'", inode_parent, name)
+ _logger.debug("arv-mount rmdir: parent_inode %i '%s'", inode_parent, name)
p = self._check_writable(inode_parent)
p.rmdir(name)
@catch_exceptions
def rename(self, inode_parent_old, name_old, inode_parent_new, name_new):
- _logger.debug("arv-mount rename: %i '%s' %i '%s'", inode_parent_old, name_old, inode_parent_new, name_new)
+ _logger.debug("arv-mount rename: old_parent_inode %i '%s' new_parent_inode %i '%s'", inode_parent_old, name_old, inode_parent_new, name_new)
src = self._check_writable(inode_parent_old)
dest = self._check_writable(inode_parent_new)
dest.rename(name_old, name_new, src)
projects / arvados.git / blobdiff