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import logging
import re
import os
import subprocess
import time
from avocado import skipUnless
from avocado_qemu import Test, BUILD_DIR
from avocado_qemu import wait_for_console_pattern
from avocado.utils import ssh
from qemu.accel import kvm_available
from boot_linux import BootLinux
def run_cmd(args):
subp = subprocess.Popen(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True)
stdout, stderr = subp.communicate()
ret = subp.returncode
return (stdout, stderr, ret)
def has_passwordless_sudo():
"""
This function is for use in a @avocado.skipUnless decorator, e.g.:
@skipUnless(*has_passwordless_sudo())
def test_something_that_needs_sudo(self):
...
"""
_, stderr, exitcode = run_cmd(('sudo', '-n', 'true'))
if exitcode != 0:
return (False, f'Failed to use sudo -n: {stderr.strip()}')
else:
return (True, '')
class VirtiofsSubmountsTest(BootLinux):
"""
:avocado: tags=arch:x86_64
"""
def get_portfwd(self):
port = None
res = self.vm.command('human-monitor-command',
command_line='info usernet')
for line in res.split('\r\n'):
match = \
re.search(r'TCP.HOST_FORWARD.*127\.0\.0\.1\s*(\d+)\s+10\.',
line)
if match is not None:
port = match[1]
break
self.assertIsNotNone(port)
self.log.debug('sshd listening on port: ' + port)
return port
def ssh_connect(self, username, keyfile):
self.ssh_logger = logging.getLogger('ssh')
port = self.get_portfwd()
self.ssh_session = ssh.Session('127.0.0.1', port=int(port),
user=username, key=keyfile)
for i in range(10):
try:
self.ssh_session.connect()
return
except:
time.sleep(4)
pass
self.fail('sshd timeout')
def ssh_command(self, command):
self.ssh_logger.info(command)
result = self.ssh_session.cmd(command)
stdout_lines = [line.rstrip() for line
in result.stdout_text.splitlines()]
for line in stdout_lines:
self.ssh_logger.info(line)
stderr_lines = [line.rstrip() for line
in result.stderr_text.splitlines()]
for line in stderr_lines:
self.ssh_logger.warning(line)
self.assertEqual(result.exit_status, 0,
f'Guest command failed: {command}')
return stdout_lines, stderr_lines
def run(self, args, ignore_error=False):
stdout, stderr, ret = run_cmd(args)
if ret != 0:
cmdline = ' '.join(args)
if not ignore_error:
self.fail(f'{cmdline}: Returned {ret}: {stderr}')
else:
self.log.warn(f'{cmdline}: Returned {ret}: {stderr}')
return (stdout, stderr, ret)
def set_up_shared_dir(self):
atwd = os.getenv('AVOCADO_TEST_WORKDIR')
self.shared_dir = os.path.join(atwd, 'virtiofs-shared')
os.mkdir(self.shared_dir)
self.run(('cp', self.get_data('guest.sh'),
os.path.join(self.shared_dir, 'check.sh')))
self.run(('cp', self.get_data('guest-cleanup.sh'),
os.path.join(self.shared_dir, 'cleanup.sh')))
def set_up_virtiofs(self):
attmp = os.getenv('AVOCADO_TESTS_COMMON_TMPDIR')
self.vfsdsock = os.path.join(attmp, 'vfsdsock')
self.run(('sudo', '-n', 'rm', '-f', self.vfsdsock), ignore_error=True)
self.virtiofsd = \
subprocess.Popen(('sudo', '-n',
'tools/virtiofsd/virtiofsd',
f'--socket-path={self.vfsdsock}',
'-o', f'source={self.shared_dir}',
'-o', 'cache=always',
'-o', 'xattr',
'-o', 'announce_submounts',
'-f'),
stdout=subprocess.DEVNULL,
stderr=subprocess.PIPE,
universal_newlines=True)
while not os.path.exists(self.vfsdsock):
if self.virtiofsd.poll() is not None:
self.fail('virtiofsd exited prematurely: ' +
self.virtiofsd.communicate()[1])
time.sleep(0.1)
self.run(('sudo', '-n', 'chmod', 'go+rw', self.vfsdsock))
self.vm.add_args('-chardev',
f'socket,id=vfsdsock,path={self.vfsdsock}',
'-device',
'vhost-user-fs-pci,queue-size=1024,chardev=vfsdsock' \
',tag=host',
'-object',
'memory-backend-file,id=mem,size=1G,' \
'mem-path=/dev/shm,share=on',
'-numa',
'node,memdev=mem')
def launch_vm(self):
self.launch_and_wait()
self.ssh_connect('root', self.ssh_key)
def set_up_nested_mounts(self):
scratch_dir = os.path.join(self.shared_dir, 'scratch')
try:
os.mkdir(scratch_dir)
except FileExistsError:
pass
args = ['bash', self.get_data('host.sh'), scratch_dir]
if self.seed:
args += [self.seed]
out, _, _ = self.run(args)
seed = re.search(r'^Seed: \d+', out)
self.log.info(seed[0])
def mount_in_guest(self):
self.ssh_command('mkdir -p /mnt/host')
self.ssh_command('mount -t virtiofs host /mnt/host')
def check_in_guest(self):
self.ssh_command('bash /mnt/host/check.sh /mnt/host/scratch/share')
def live_cleanup(self):
self.ssh_command('bash /mnt/host/cleanup.sh /mnt/host/scratch')
# It would be nice if the above was sufficient to make virtiofsd clear
# all references to the mounted directories (so they can be unmounted
# on the host), but unfortunately it is not. To do so, we have to
# resort to a remount.
self.ssh_command('mount -o remount /mnt/host')
scratch_dir = os.path.join(self.shared_dir, 'scratch')
self.run(('bash', self.get_data('cleanup.sh'), scratch_dir))
@skipUnless(*has_passwordless_sudo())
def setUp(self):
vmlinuz = self.params.get('vmlinuz')
if vmlinuz is None:
self.cancel('vmlinuz parameter not set; you must point it to a '
'Linux kernel binary to test (to run this test with ' \
'the on-image kernel, set it to an empty string)')
self.seed = self.params.get('seed')
atwd = os.getenv('AVOCADO_TEST_WORKDIR')
self.ssh_key = os.path.join(atwd, 'id_ed25519')
self.run(('ssh-keygen', '-t', 'ed25519', '-f', self.ssh_key))
pubkey = open(self.ssh_key + '.pub').read()
super(VirtiofsSubmountsTest, self).setUp(pubkey)
if len(vmlinuz) > 0:
self.vm.add_args('-kernel', vmlinuz,
'-append', 'console=ttyS0 root=/dev/sda1')
# Allow us to connect to SSH
self.vm.add_args('-netdev', 'user,id=vnet,hostfwd=:127.0.0.1:0-:22',
'-device', 'e1000,netdev=vnet')
if not kvm_available(self.arch, self.qemu_bin):
self.cancel(KVM_NOT_AVAILABLE)
self.vm.add_args('-accel', 'kvm')
def tearDown(self):
try:
self.vm.shutdown()
except:
pass
scratch_dir = os.path.join(self.shared_dir, 'scratch')
self.run(('bash', self.get_data('cleanup.sh'), scratch_dir),
ignore_error=True)
def test_pre_virtiofsd_set_up(self):
self.set_up_shared_dir()
self.set_up_nested_mounts()
self.set_up_virtiofs()
self.launch_vm()
self.mount_in_guest()
self.check_in_guest()
def test_pre_launch_set_up(self):
self.set_up_shared_dir()
self.set_up_virtiofs()
self.set_up_nested_mounts()
self.launch_vm()
self.mount_in_guest()
self.check_in_guest()
def test_post_launch_set_up(self):
self.set_up_shared_dir()
self.set_up_virtiofs()
self.launch_vm()
self.set_up_nested_mounts()
self.mount_in_guest()
self.check_in_guest()
def test_post_mount_set_up(self):
self.set_up_shared_dir()
self.set_up_virtiofs()
self.launch_vm()
self.mount_in_guest()
self.set_up_nested_mounts()
self.check_in_guest()
def test_two_runs(self):
self.set_up_shared_dir()
self.set_up_nested_mounts()
self.set_up_virtiofs()
self.launch_vm()
self.mount_in_guest()
self.check_in_guest()
self.live_cleanup()
self.set_up_nested_mounts()
self.check_in_guest()
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