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qemu-iotest: Add pause_drive and resume_drive methods 

They wrap blkdebug "break" and "remove_break".

Add optional argument "resume" to cancel_and_wait().

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2013-11-20 10:01:55 +08:00 committed by Kevin Wolf
parent 4cc70e9337
commit 3cf53c7714
1 changed files with 17 additions and 1 deletions
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18
tests/qemu-iotests/iotests.py
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@ -107,6 +107,19 @@ class VM(object):
self._num_drives += 1
return self
def pause_drive(self, drive, event=None):
'''Pause drive r/w operations'''
if not event:
self.pause_drive(drive, "read_aio")
self.pause_drive(drive, "write_aio")
return
self.qmp('human-monitor-command',
command_line='qemu-io %s "break %s bp_%s"' % (drive, event, drive))
def resume_drive(self, drive):
self.qmp('human-monitor-command',
command_line='qemu-io %s "remove_break bp_%s"' % (drive, drive))
def hmp_qemu_io(self, drive, cmd):
'''Write to a given drive using an HMP command'''
return self.qmp('human-monitor-command',
@ -222,11 +235,14 @@ class QMPTestCase(unittest.TestCase):
result = self.vm.qmp('query-block-jobs')
self.assert_qmp(result, 'return', [])
def cancel_and_wait(self, drive='drive0', force=False):
def cancel_and_wait(self, drive='drive0', force=False, resume=False):
'''Cancel a block job and wait for it to finish, returning the event'''
result = self.vm.qmp('block-job-cancel', device=drive, force=force)
self.assert_qmp(result, 'return', {})
if resume:
self.vm.resume_drive(drive)
cancelled = False
result = None
while not cancelled: