xref: /qemu/tests/qemu-iotests/148 (revision 27a4a30e) 
1#!/usr/bin/env python3
2#
3# Test the rate limit of QMP events
4#
5# Copyright (C) 2016 Igalia, S.L.
6# Author: Alberto Garcia <berto@igalia.com>
7#
8# This program is free software; you can redistribute it and/or modify
9# it under the terms of the GNU General Public License as published by
10# the Free Software Foundation; either version 2 of the License, or
11# (at your option) any later version.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16# GNU General Public License for more details.
17#
18# You should have received a copy of the GNU General Public License
19# along with this program.  If not, see <http://www.gnu.org/licenses/>.
20#
21
22import os
23import iotests
24
25imgs = (os.path.join(iotests.test_dir, 'quorum0.img'),
26        os.path.join(iotests.test_dir, 'quorum1.img'),
27        os.path.join(iotests.test_dir, 'quorum2.img'))
28
29img_conf = (os.path.join(iotests.test_dir, 'quorum0.conf'),
30            os.path.join(iotests.test_dir, 'quorum1.conf'),
31            os.path.join(iotests.test_dir, 'quorum2.conf'))
32
33event_rate = 1000000000
34sector_size = 512
35offset = 10
36
37class TestQuorumEvents(iotests.QMPTestCase):
38    read_pattern = 'quorum'
39
40    def create_blkdebug_file(self, blkdebug_file, bad_sector):
41        file = open(blkdebug_file, 'w')
42        file.write('''
43[inject-error]
44event = "read_aio"
45errno = "5"
46sector = "%d"
47''' % bad_sector)
48        file.close()
49
50    def setUp(self):
51        driveopts = ['driver=quorum', 'vote-threshold=2']
52        driveopts.append('read-pattern=%s' % self.read_pattern)
53        for i in range(len(imgs)):
54            iotests.qemu_img('create', '-f', iotests.imgfmt, imgs[i], '1M')
55            self.create_blkdebug_file(img_conf[i], i + offset)
56            driveopts.append('children.%d.driver=%s' % (i, iotests.imgfmt))
57            driveopts.append('children.%d.file.driver=blkdebug' % i)
58            driveopts.append('children.%d.file.config=%s' % (i, img_conf[i]))
59            driveopts.append('children.%d.file.image.filename=%s' % (i, imgs[i]))
60            driveopts.append('children.%d.node-name=img%d' % (i, i))
61        self.vm = iotests.VM()
62        self.vm.add_drive(None, opts = ','.join(driveopts))
63        self.vm.launch()
64
65    def tearDown(self):
66        self.vm.shutdown()
67        for i in range(len(imgs)):
68            os.remove(imgs[i])
69            os.remove(img_conf[i])
70
71    def do_check_event(self, node, sector = 0):
72        if node == None:
73            self.assertEqual(self.vm.get_qmp_event(), None)
74            return
75
76        for event in self.vm.get_qmp_events(wait=True):
77            if event['event'] == 'QUORUM_REPORT_BAD':
78                self.assert_qmp(event, 'data/node-name', node)
79                self.assert_qmp(event, 'data/sector-num', sector)
80
81    def testQuorum(self):
82        # Generate an error and get an event
83        self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
84                            (offset * sector_size, sector_size))
85        self.vm.qtest("clock_step 10")
86        self.do_check_event('img0', offset)
87
88        # I/O errors in the same child: only one event is emitted
89        delay = 10
90        for i in range(3):
91            self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
92                                (offset * sector_size, sector_size))
93            self.vm.qtest("clock_step %d" % delay)
94            self.do_check_event(None)
95
96        # Wait enough so the event is finally emitted
97        self.vm.qtest("clock_step %d" % (2 * event_rate))
98        self.do_check_event('img0', offset)
99
100        # I/O errors in the same child: all events are emitted
101        delay = 2 * event_rate
102        for i in range(3):
103            self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
104                                (offset * sector_size, sector_size))
105            self.vm.qtest("clock_step %d" % delay)
106            self.do_check_event('img0', offset)
107
108        # I/O errors in different children: all events are emitted
109        delay = 10
110        for i in range(len(imgs)):
111            self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
112                                ((offset + i) * sector_size, sector_size))
113            self.vm.qtest("clock_step %d" % delay)
114            # In fifo mode only errors in the first child are detected
115            if i > 0 and self.read_pattern == 'fifo':
116                self.do_check_event(None)
117            else:
118                self.do_check_event('img%d' % i, offset + i)
119
120        # I/O errors in different children: all events are emitted
121        delay = 2 * event_rate
122        for i in range(len(imgs)):
123            self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
124                                ((offset + i) * sector_size, sector_size))
125            self.vm.qtest("clock_step %d" % delay)
126            # In fifo mode only errors in the first child are detected
127            if i > 0 and self.read_pattern == 'fifo':
128                self.do_check_event(None)
129            else:
130                self.do_check_event('img%d' % i, offset + i)
131
132        # No more pending events
133        self.do_check_event(None)
134
135class TestFifoQuorumEvents(TestQuorumEvents):
136    read_pattern = 'fifo'
137
138if __name__ == '__main__':
139    iotests.verify_quorum()
140    iotests.main(supported_fmts=["raw"],
141                 supported_protocols=["file"])
142