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When we have two logical volumes which switch their names at the
same time we are left with incorrect lookups. Anytime we find
an entry by doing a lookup by UUID or by name we will ensure
that the lookups are indeed correct.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1642176
When a user does a Manager.PvCreate they can specify the block device using a
device path that may be different than what lvm reports is the device path. For
example a user could use:
/dev/disk/by-id/wwn-0x5002538500000000 instead of /dev/sdc
In this case the pvcreate will succeed, but when we query lvm we don't find the
newly created PV. We fail because it's device path is returned as /dev/sdc. This
change re-uses an internal lookup which can accommodate this and correctly find
the newly created PV.
Corrects https://bugzilla.redhat.com/show_bug.cgi?id=1445654
We need to place query operations in the queue to prevent the case where
a client knows of something before the service does. For example if a
client creates a PV/VG/LV outside of the dbus API and then immediately
tries to lookup and use that resource in the lvm dbus service it should
be present. By placing the queries in the work queue any previous
refresh operation will complete before we process the query.
When a PV device is missing lvm will return '[unknown]' for the device
path. The object manager keeps a hash table lookup for uuid and for PV's
device name. When we had multiple PVs with the same device path we
we only had 1 key in the table for the lvm id (device path). This caused
a problem when the PV device transitioned from '[unknown]' to known as any
subsequent transitions would cause an exception:
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/lvmdbusd/request.py", line 66, in run_cmd
result = self.method(*self.arguments)
File "/usr/lib/python3.5/site-packages/lvmdbusd/manager.py", line 205, in _pv_scan
cfg.load()
File "/usr/lib/python3.5/site-packages/lvmdbusd/fetch.py", line 24, in load
cache_refresh=False)[1]
File "/usr/lib/python3.5/site-packages/lvmdbusd/pv.py", line 48, in load_pvs
emit_signal, cache_refresh)
File "/usr/lib/python3.5/site-packages/lvmdbusd/loader.py", line 80, in common
cfg.om.remove_object(cfg.om.get_object_by_path(k), True)
File "/usr/lib/python3.5/site-packages/lvmdbusd/objectmanager.py", line 153, in remove_object
self._lookup_remove(path)
File "/usr/lib/python3.5/site-packages/lvmdbusd/objectmanager.py", line 97, in _lookup_remove
del self._id_to_object_path[lvm_id]
KeyError: '[unknown]'
when trying to delete a key that wasn't present. In this case we don't add a
lookup key for the device path and the PV can only be located by UUID.
Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1379357
The object manager method get_object_by_lvm_id was used in many cases for
the sole reason of getting the object path for the object. Instead of
retrieving the object and then calling 'dbus_object_path' on the object, we
are adding a method which returns the object path.
