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[Qemu-devel] [PATCH v10 8/8] qemu.py: don't launch again before shutdown

From: Amador Pahim
Subject: [Qemu-devel] [PATCH v10 8/8] qemu.py: don't launch again before shutdown()
Date: Mon, 13 Nov 2017 23:23:58 +0100

If a VM is launched, files are created and a cleanup is required before
a new launch. This cleanup is executed by shutdown(), so shutdown() must
be called even if the VM is manually terminated (i.e. using kill).

This patch creates a control to make sure launch() will not be executed
again if shutdown() is not called after the previous launch().

Signed-off-by: Amador Pahim <address@hidden>
 scripts/qemu.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/qemu.py b/scripts/qemu.py
index ab172c3670..c1b0895e94 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -89,6 +89,7 @@ class QEMUMachine(object):
         self._qemu_full_args = None
         self._test_dir = test_dir
         self._temp_dir = None
+        self._launched = False
         # just in case logging wasn't configured by the main script:
@@ -210,10 +211,14 @@ class QEMUMachine(object):
         if self.is_running():
             raise QEMUMachineError('VM already running')
+        if self._launched:
+            raise QEMUMachineError('Shutdown pending after previous launch')
         self._iolog = None
         self._qemu_full_args = None
+            self._launched = True
@@ -266,6 +271,8 @@ class QEMUMachine(object):
                 command = ''
             LOG.warn(msg, exitcode, command)
+        self._launched = False
     def qmp(self, cmd, conv_keys=True, **args):
         '''Invoke a QMP command and return the response dict'''
         qmp_args = dict()

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