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2020-10-20python/qemu/qmp.py: Fix settimeout operationJohn Snow
We enabled callers to interface directly with settimeout, but this reacts poorly with blocking/nonblocking operation; as they are using the same internal mechanism. 1. Whenever we change the blocking mechanism temporarily, always set it back to what it was afterwards. 2. Disallow callers from setting a timeout of "0", which means Non-blocking mode. This is going to create more weird problems than anybody wants, so just forbid it. I opt not to coerce '0' to 'None' to maintain the principal of least surprise in mirroring the semantics of Python's interface. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201009175123.249009-4-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/qmp.py: re-raise OSError when encounteredJohn Snow
Nested if conditions don't change when the exception block fires; we need to explicitly re-raise the error if we didn't intend to capture and suppress it. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201009175123.249009-3-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python: add mypy configJohn Snow
Formalize the options used for checking the python library. You can run mypy from the directory that mypy.ini is in by typing `mypy qemu/`. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 20201009175123.249009-2-jsnow@redhat.com [Edit: Added newline; thanks Bin Meng --js] Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/qmp.py: Preserve error context on re-raiseJohn Snow
Use the "from ..." phrasing when re-raising errors to preserve their initial context, to help aid debugging when things go wrong. This also silences a pylint 2.6.0+ error. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-18-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/console_socket.py: avoid encoding to/from stringJohn Snow
We can work directly in bytes instead of translating back and forth to string, which removes the question of which encodings to use. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-17-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/console_socket.py: Add type hint annotationsJohn Snow
Finish the typing of console_socket.py with annotations and no code changes. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-16-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/console_socket.py: Clarify type of drain_threadJohn Snow
Mypy needs just a little help to guess the type here. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-15-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/console_socket.py: fix typing of settimeoutJohn Snow
The types and names of the parameters must match the socket.socket interface. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-14-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu/console_socket.py: Correct type of recv()John Snow
The type and parameter names of recv() should match socket.socket(). OK, easy enough, but in the cases we don't pass straight through to the real socket implementation, we probably can't accept such flags. OK, for now, assert that we don't receive flags in such cases. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-13-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu: Add mypy type annotationsJohn Snow
These should all be purely annotations with no changes in behavior at all. You need to be in the python folder, but you should be able to confirm that these annotations are correct (or at least self-consistent) by running `mypy --strict qemu`. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-12-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu: make 'args' style arguments immutableJohn Snow
These arguments don't need to be mutable and aren't really used as such. Clarify their types as immutable and adjust code to match where necessary. In general, It's probably best not to accept a user-defined mutable object and store it as internal object state unless there's a strong justification for doing so. Instead, try to use generic types as input with empty tuples as the default, and coerce to list where necessary. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201006235817.3280413-10-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: fix _popen accessJohn Snow
As always, Optional[T] causes problems with unchecked access. Add a helper that asserts the pipe is present before we attempt to talk with it. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-9-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: Add _qmp access shimJohn Snow
Like many other Optional[] types, it's not always a given that this object will be set. Wrap it in a type-shim that raises a meaningful error and will always return a concrete type. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-8-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: use qmp.commandJohn Snow
machine.py and qmp.py both do the same thing here; refactor machine.py to use qmp.py's functionality more directly. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201006235817.3280413-7-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: Handle None events in events_waitJohn Snow
If the timeout is 0, we can get None back. Handle this explicitly. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-6-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: Don't modify state in _base_args()John Snow
Don't append to the _remove_files list during _base_args; instead do so during _launch. Rework _base_args as a @property to help facilitate this impression. This has the additional benefit of making the type of _console_address easier to analyze statically. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-5-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: reorder __init__John Snow
Put the init arg handling all at the top, and mostly in order (deviating when one is dependent on another), and put what is effectively runtime state declaration at the bottom. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-4-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/machine.py: Fix monitor address typingJohn Snow
Prior to this, it's difficult for mypy to intuit what the concrete type of the monitor address is; it has difficulty inferring the type across two variables. Create _monitor_address as a property that always returns a valid address to simplify static type analysis. To preserve our ability to clean up, use a simple boolean to indicate whether or not we should try to clean up the sock file after execution. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-3-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-10-20python/qemu: use isort to lay out importsJohn Snow
Borrowed from the QAPI cleanup series, use the same configuration to standardize the way we write and sort imports. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20201006235817.3280413-2-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2020-07-27python/qemu: Change ConsoleSocket to optionally drain socket.Robert Foley
The primary purpose of this change is to clean up machine.py's console_socket property to return a single type, a ConsoleSocket. ConsoleSocket now derives from a socket, which means that in the default case (of not draining), machine.py will see the same behavior as it did prior to ConsoleSocket. Signed-off-by: Robert Foley <robert.foley@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200717203041.9867-3-robert.foley@linaro.org> Message-Id: <20200724064509.331-16-alex.bennee@linaro.org>
2020-07-27python/qemu: Cleanup changes to ConsoleSocketRobert Foley
The changes to console_socket.py and machine.py are to cleanup for pylint and flake8. Signed-off-by: Robert Foley <robert.foley@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20200717203041.9867-2-robert.foley@linaro.org> Message-Id: <20200724064509.331-15-alex.bennee@linaro.org>
2020-07-25python/machine: Change default timeout to 30 secondsJohn Snow
3 seconds is too short for some tests running inside busy VMs. Build it out to a rather generous 30 seconds to find out conclusively if there are more severe problems in the merge/CI tests. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-id: 20200720160252.104139-2-jsnow@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-07-14python/qmp.py: add QMPProtocolErrorJohn Snow
In the case that we receive a reply but are unable to understand it, use this exception name to indicate that case. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200710052220.3306-7-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/qmp.py: add casts to JSON deserializationJohn Snow
mypy and python type hints are not powerful enough to properly describe JSON messages in Python 3.6. The best we can do, generally, is describe them as Dict[str, Any]. Add casts to coerce this type for static analysis; but do NOT enforce this type at runtime in any way. Note: Python 3.8 adds a TypedDict construct which allows for the description of more arbitrary Dictionary shapes. There is a third-party module, "Pydantic", which is compatible with 3.6 that can be used instead of the JSON library that parses JSON messages to fully-typed Python objects, and may be preferable in some cases. (That is well beyond the scope of this commit or series.) Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200710052220.3306-6-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/qmp.py: Do not return None from cmd_objJohn Snow
This makes typing the qmp library difficult, as it necessitates wrapping Optional[] around the type for every return type up the stack. At some point, it becomes difficult to discern or remember why it's None instead of the expected object. Use the python exception system to tell us exactly why we didn't get an object. Remove this special-cased return. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200710052220.3306-5-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/qmp.py: re-absorb MonitorResponseErrorJohn Snow
When I initially split this out, I considered this more of a machine error than a QMP protocol error, but I think that's misguided. Move this back to qmp.py and name it QMPResponseError. Convert qmp.command() to use this exception type. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200710052220.3306-4-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/qmp.py: Define common typesJohn Snow
Define some common types that we'll need to annotate a lot of other functions going forward. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20200710052220.3306-2-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: change default wait timeout to 3 secondsJohn Snow
Machine.wait() does not appear to be used except in the acceptance tests, and an infinite timeout by default in a test suite is not the most helpful. Change it to 3 seconds, like the default shutdown timeout. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-13-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: re-add sigkill warning suppressionJohn Snow
If the user kills QEMU on purpose, we don't need to warn them about that having happened: they know already. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-12-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: split shutdown into hard and soft flavorsJohn Snow
This is done primarily to avoid the 'bare except' pattern, which suppresses all exceptions during shutdown and can obscure errors. Replace this with a pattern that isolates the different kind of shutdown paradigms (_hard_shutdown and _soft_shutdown), and a new fallback shutdown handler (_do_shutdown) that gracefully attempts one before the other. This split now also ensures that no matter what happens, _post_shutdown() is always invoked. shutdown() changes in behavior such that if it attempts to do a graceful shutdown and is unable to, it will now always raise an exception to indicate this. This can be avoided by the test writer in three ways: 1. If the VM is expected to have already exited or is in the process of exiting, wait() can be used instead of shutdown() to clean up resources instead. This helps avoid race conditions in shutdown. 2. If a test writer is expecting graceful shutdown to fail, shutdown should be called in a try...except block. 3. If the test writer has no interest in performing a graceful shutdown at all, kill() can be used instead. Handling shutdown in this way makes it much more explicit which type of shutdown we want and allows the library to report problems with this process. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-11-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Make wait() call shutdown()John Snow
At this point, shutdown(has_quit=True) and wait() do essentially the same thing; they perform cleanup without actually instructing QEMU to quit. Define one in terms of the other. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-8-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Add a configurable timeout to shutdown()John Snow
Three seconds is hardcoded. Use it as a default parameter instead, and use that value for both waits that may occur in the function. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-7-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Prohibit multiple shutdown() callsJohn Snow
If the VM is not launched, don't try to shut it down. As a change, _post_shutdown now unconditionally also calls _early_cleanup in order to offer comprehensive object cleanup in failure cases. As a courtesy, treat it as a NOP instead of rejecting it as an error. This is slightly nicer for acceptance tests where vm.shutdown() is issued unconditionally in tearDown callbacks. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200710050649.32434-6-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Perform early cleanup for wait() calls, tooJohn Snow
This is primarily for consistency, and is a step towards wait() and shutdown() sharing the same implementation so that the two cleanup paths cannot diverge. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-5-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Add _early_cleanup hookJohn Snow
Some parts of cleanup need to occur prior to shutdown, otherwise shutdown might break. Move this into a suitably named method/callback. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-4-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: Close QMP socket in cleanupJohn Snow
It's not important to do this before waiting for the process to exit, so it can be done during generic post-shutdown cleanup. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200710050649.32434-3-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-14python/machine.py: consolidate _post_shutdown()John Snow
Move more cleanup actions into _post_shutdown. As a change, if QEMU should so happen to be terminated during a call to wait(), that event will now be logged. This is not likely to occur during normative use. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200710050649.32434-2-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-07-11python/qemu: Add ConsoleSocket for optional use in QEMUMachineRobert Foley
We add the ConsoleSocket object, which has a socket interface and which will consume all arriving characters on the socket, placing them into an in memory buffer. This will also provide those chars via recv() as would a regular socket. ConsoleSocket also has the option of dumping the console bytes to a log file. We also give QEMUMachine the option of using ConsoleSocket to drain and to use for logging console to a file. By default QEMUMachine does not use ConsoleSocket. This is added in preparation for use by basevm.py in a later commit. This is a workaround we found was needed for basevm.py since there is a known issue where QEMU will hang waiting for console characters to be consumed. Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Cleber Rosa <crosa@redhat.com> Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Peter Puhov <peter.puhov@linaro.org> Acked-by: Alex Bennée <alex.bennee@linaro.org> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20200601211421.1277-9-robert.foley@linaro.org> Message-Id: <20200701135652.1366-13-alex.bennee@linaro.org>
2020-05-31python/qemu/qtest: Check before accessing _qtestJohn Snow
It can be None; so add assertions or exceptions where appropriate to guard the access accordingly. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-30-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/qmp: assert sockfile is not NoneJohn Snow
In truth, if you don't do this, you'll just get a TypeError exception. Now, you'll get an AssertionError. Is this tangibly better? No. Does mypy complain less? Yes. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-21-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/qmp: use True/False for non/blocking modesJohn Snow
The type system doesn't want integers. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-15-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: Adjust traceback typingJohn Snow
mypy considers it incorrect to use `bool` to statically return false, because it will assume that it could conceivably return True, and gives different analysis in that case. Use a None return to achieve the same effect, but make mypy happy. Note: Pylint considers function signatures as code that might trip the duplicate-code checker. I'd rather not disable this as it does not trigger often in practice, so I'm disabling it as a one-off and filed a change request; see https://github.com/PyCQA/pylint/issues/3619 Signed-off-by: John Snow <jsnow@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-14-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: fix socket.makefile() typingJohn Snow
Note: A bug in typeshed (https://github.com/python/typeshed/issues/3977) misinterprets the type of makefile(). Work around this by explicitly stating that we are opening a text-mode file. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-13-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: remove Python2 style super() callsJohn Snow
Use the Python3 style instead. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-12-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: delint; add flake8 configJohn Snow
Mostly, ignore the "no bare except" rule, because flake8 is not contextual and cannot determine if we re-raise. Pylint can, though, so always prefer pylint for that. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200528222129.23826-5-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: delint and add pylintrcJohn Snow
Bring our these files up to speed with pylint 2.5.0. Add a pylintrc file to formalize which pylint subset we are targeting. The similarity ignore is there to suppress similarity reports across imports, which for typing constants, are going to trigger this report erroneously. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200528222129.23826-4-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/machine: remove logging configurationJohn Snow
Python 3.5 and above do not print a warning when logging is not configured. As a library, it's best practice to leave logging configuration to the client executable. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-22-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/machine: add kill() methodVladimir Sementsov-Ogievskiy
Add method to hard-kill vm, without any quit commands. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200217150246.29180-19-vsementsov@virtuozzo.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-03-21python/qemu: Kill QEMU process if 'quit' doesn't workKevin Wolf
With a QEMU bug, it can happen that the QEMU process doesn't react to a 'quit' QMP command. If we got an exception during previous QMP communication (e.g. iotests Timeout expiring), we could also be in an inconsistent state where after sending 'quit' we immediately read an old response and close the socket even though the 'quit' command wasn't processed yet. Both cases would lead to a hanging test. Fix this by waiting for the QEMU process to exit after sending 'quit' with a timeout, and if it doesn't happen within three seconds, send SIGKILL. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200313083617.8326-3-kwolf@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-03-17python/qemu/qmp.py: QMP debug with VM labelOksana Vohchana
QEMUMachine writes some messages to the default logger. But it sometimes hard to read the output if we have requests to more than one VM. This patch adds a label to the logger in the debug mode. Signed-off-by: Oksana Vohchana <ovoshcha@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200316103203.10046-1-ovoshcha@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
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