Remove intermediate qubesd-query-fast proxy process.
This requires changing socket protocol to match what qrexec is sending
in the header.
FixesQubesOS/qubes-issues#3293
There are cases when destination domain doesn't exist when the call gets
to qubesd. Namely:
1. The call comes from dom0, which bypasses qrexec policy
2. Domain was removed between checking the policy and here
Handle the the same way as if the domain wouldn't exist at policy
evaluation stage either - i.e. refuse the call.
On the client side it doesn't change much, but on the server call it
avoids ugly, useless tracebacks in system journal.
FixesQubesOS/qubes-issues#5105
Resolve:
- no-else-return
- useless-object-inheritance
- useless-return
- consider-using-set-comprehension
- consider-using-in
- logging-not-lazy
Ignore:
- not-an-iterable - false possitives for asyncio coroutines
Ignore all the above in qubespolicy/__init__.py, as the file will be
moved to separate repository (core-qrexec) - it already has a copy
there, don't desynchronize them.
Those "errors" are already properly handled, and if necessary logged
independently by appropriate function. In some cases, such logs are
misleading (for example QubesNoSuchPropertyError is a normal thing
happening during qvm-ls).
FixesQubesOS/qubes-issues#3238
When an API call is interrupted, the relevant coroutine is cancelled -
which means it may throw CancelledError. At the same time, cancelled
call have related socket already closed (and transport set to None). But
QubesDaemonProtocol.respond try to close the transport again, which
fails. Fix handling this case.
