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145 lines
5.1 KiB
145 lines
5.1 KiB
From 399bfc04fb8352af6d2f4c984e68c334d2043368 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Wed, 17 May 2023 17:28:34 +0200
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Subject: [PATCH 04/21] iotests: Test commit with iothreads and ongoing I/O
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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RH-MergeRequest: 166: block/graph-lock: Disable locking for now
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RH-Bugzilla: 2186725
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RH-Acked-by: Eric Blake <eblake@redhat.com>
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Commit: [4/4] 1e42fde5951ae12bddc4eea2320f066f7079878f (kmwolf/centos-qemu-kvm)
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This tests exercises graph locking, draining, and graph modifications
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with AioContext switches a lot. Amongst others, it serves as a
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regression test for bdrv_graph_wrlock() deadlocking because it is called
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with a locked AioContext and for AioContext handling in the NBD server.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Message-Id: <20230517152834.277483-4-kwolf@redhat.com>
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Tested-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 95fdd8db61848d31fde1d9b32da7f3f76babfa25)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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tests/qemu-iotests/iotests.py | 4 ++
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.../qemu-iotests/tests/graph-changes-while-io | 56 +++++++++++++++++--
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.../tests/graph-changes-while-io.out | 4 +-
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3 files changed, 58 insertions(+), 6 deletions(-)
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diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
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index 3e82c634cf..7073579a7d 100644
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--- a/tests/qemu-iotests/iotests.py
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+++ b/tests/qemu-iotests/iotests.py
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@@ -462,6 +462,10 @@ def qmp(self, cmd: str, args: Optional[Dict[str, object]] = None) \
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assert self._qmp is not None
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return self._qmp.cmd(cmd, args)
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+ def get_qmp(self) -> QEMUMonitorProtocol:
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+ assert self._qmp is not None
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+ return self._qmp
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+
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def stop(self, kill_signal=15):
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self._p.send_signal(kill_signal)
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self._p.wait()
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diff --git a/tests/qemu-iotests/tests/graph-changes-while-io b/tests/qemu-iotests/tests/graph-changes-while-io
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index 7664f33689..750e7d4d38 100755
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--- a/tests/qemu-iotests/tests/graph-changes-while-io
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+++ b/tests/qemu-iotests/tests/graph-changes-while-io
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@@ -22,19 +22,19 @@
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import os
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from threading import Thread
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import iotests
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-from iotests import imgfmt, qemu_img, qemu_img_create, QMPTestCase, \
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- QemuStorageDaemon
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+from iotests import imgfmt, qemu_img, qemu_img_create, qemu_io, \
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+ QMPTestCase, QemuStorageDaemon
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top = os.path.join(iotests.test_dir, 'top.img')
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nbd_sock = os.path.join(iotests.sock_dir, 'nbd.sock')
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-def do_qemu_img_bench() -> None:
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+def do_qemu_img_bench(count: int = 2000000) -> None:
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"""
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Do some I/O requests on `nbd_sock`.
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"""
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- qemu_img('bench', '-f', 'raw', '-c', '2000000',
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+ qemu_img('bench', '-f', 'raw', '-c', str(count),
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f'nbd+unix:///node0?socket={nbd_sock}')
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@@ -84,6 +84,54 @@ class TestGraphChangesWhileIO(QMPTestCase):
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bench_thr.join()
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+ def test_commit_while_io(self) -> None:
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+ # Run qemu-img bench in the background
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+ bench_thr = Thread(target=do_qemu_img_bench, args=(200000, ))
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+ bench_thr.start()
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+
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+ qemu_io('-c', 'write 0 64k', top)
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+ qemu_io('-c', 'write 128k 64k', top)
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+
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+ result = self.qsd.qmp('blockdev-add', {
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+ 'driver': imgfmt,
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+ 'node-name': 'overlay',
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+ 'backing': None,
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+ 'file': {
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+ 'driver': 'file',
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+ 'filename': top
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+ }
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+ })
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+ self.assert_qmp(result, 'return', {})
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+
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+ result = self.qsd.qmp('blockdev-snapshot', {
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+ 'node': 'node0',
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+ 'overlay': 'overlay',
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+ })
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+ self.assert_qmp(result, 'return', {})
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+
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+ # While qemu-img bench is running, repeatedly commit overlay to node0
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+ while bench_thr.is_alive():
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+ result = self.qsd.qmp('block-commit', {
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+ 'job-id': 'job0',
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+ 'device': 'overlay',
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+ })
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+ self.assert_qmp(result, 'return', {})
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+
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+ result = self.qsd.qmp('block-job-cancel', {
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+ 'device': 'job0',
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+ })
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+ self.assert_qmp(result, 'return', {})
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+
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+ cancelled = False
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+ while not cancelled:
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+ for event in self.qsd.get_qmp().get_events(wait=10.0):
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+ if event['event'] != 'JOB_STATUS_CHANGE':
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+ continue
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+ if event['data']['status'] == 'null':
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+ cancelled = True
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+
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+ bench_thr.join()
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+
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if __name__ == '__main__':
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# Format must support raw backing files
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iotests.main(supported_fmts=['qcow', 'qcow2', 'qed'],
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diff --git a/tests/qemu-iotests/tests/graph-changes-while-io.out b/tests/qemu-iotests/tests/graph-changes-while-io.out
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index ae1213e6f8..fbc63e62f8 100644
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--- a/tests/qemu-iotests/tests/graph-changes-while-io.out
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+++ b/tests/qemu-iotests/tests/graph-changes-while-io.out
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@@ -1,5 +1,5 @@
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-.
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+..
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----------------------------------------------------------------------
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-Ran 1 tests
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+Ran 2 tests
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OK
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--
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2.39.3
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