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import logging
import re
import os
import subprocess
import time
from avocado import skipUnless
from avocado_qemu import LinuxTest, BUILD_DIR
from avocado_qemu import has_cmds
from avocado_qemu import run_cmd
from avocado_qemu import wait_for_console_pattern
from avocado.utils import ssh
class VirtiofsSubmountsTest(LinuxTest):
"""
:avocado: tags=arch:x86_64
:avocado: tags=accel:kvm
"""
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):
self.shared_dir = os.path.join(self.workdir, '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 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_cmds(('sudo -n', ('sudo', '-n', 'true')),
'ssh-keygen', 'bash', 'losetup', 'mkfs.xfs', 'mount'))
def setUp(self):
vmlinuz = self.params.get('vmlinuz')
if vmlinuz is None:
"""
The Linux kernel supports FUSE auto-submounts only as of 5.10.
boot_linux.py currently provides Fedora 31, whose kernel is too
old, so this test cannot pass with the on-image kernel (you are
welcome to try, hence the option to force such a test with
-p vmlinuz=''). Therefore, for now the user must provide a
sufficiently new custom kernel, or effectively explicitly
request failure with -p vmlinuz=''.
Once an image with a sufficiently new kernel is available
(probably Fedora 34), we can make -p vmlinuz='' the default, so
that this parameter no longer needs to be specified.
"""
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')
self.ssh_key = os.path.join(self.workdir, 'id_ed25519')
self.run(('ssh-keygen', '-N', '', '-t', 'ed25519', '-f', self.ssh_key))
pubkey = self.ssh_key + '.pub'
super(VirtiofsSubmountsTest, self).setUp(pubkey)
if vmlinuz:
self.vm.add_args('-kernel', vmlinuz,
'-append', 'console=ttyS0 root=/dev/sda1')
self.require_accelerator("kvm")
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_and_wait()
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_and_wait()
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_and_wait()
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_and_wait()
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_and_wait()
self.mount_in_guest()
self.check_in_guest()
self.live_cleanup()
self.set_up_nested_mounts()
self.check_in_guest()
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