from __future__ import print_function import os import stat import re import glob import subprocess import tempfile import dbus import unittest import time import sys import json import uuid from contextlib import contextmanager from enum import Enum from itertools import chain import gi gi.require_version('GLib', '2.0') from gi.repository import GLib try: from subprocess import DEVNULL except ImportError: DEVNULL = open("/dev/null", "w") _lio_devs = dict() _nvmet_devs = dict() def create_sparse_tempfile(name, size, dir="/tmp"): """ Create a temporary sparse file. :param str name: suffix for filename :param size: the file size (in bytes) :returns: the path to the newly created file """ (fd, path) = tempfile.mkstemp(prefix="bd.", suffix="-%s" % name, dir=dir) os.close(fd) create_sparse_file(path, size) return path def create_sparse_file(path, size): """ Create a sparse file. :param str path: the full path to the file :param size: the size of the file (in bytes) :returns: None """ fd = os.open(path, os.O_WRONLY|os.O_CREAT|os.O_TRUNC) os.ftruncate(fd, size) os.close(fd) def wipe_all(dev, *args): for device in chain([dev], args): os.system("wipefs -a %s >/dev/null 2>&1" % device) @contextmanager def udev_settle(): try: yield finally: os.system("udevadm settle") @contextmanager def fake_utils(path="."): if not os.path.exists(path): raise RuntimeError("Path '%s' not found" % path) old_path = os.environ.get("PATH", "") if old_path: new_path = path + ":" + old_path else: new_path = path os.environ["PATH"] = new_path try: yield finally: os.environ["PATH"] = old_path ALL_UTILS = {"lvm", "btrfs", "mkswap", "swaplabel", "multipath", "mpathconf", "dmsetup", "mdadm", "mkfs.exfat", "fsck.exfat", "tune.exfat", "mke2fs", "e2fsck", "tune2fs", "dumpe2fs", "resize2fs", "mkfs.f2fs", "fsck.f2fs", "fsck.f2fs", "dump.f2fs", "resize.f2fs", "mkfs.nilfs2", "nilfs-tune", "nilfs-resize", "mkntfs", "ntfsfix", "ntfsresize", "ntfslabel", "ntfsinfo", "mkfs.vfat", "fatlabel", "fsck.vfat", "vfat-resize", "mkfs.xfs", "xfs_db", "xfs_repair", "xfs_admin", "xfs_growfs"} @contextmanager def fake_path(path=None, keep_utils=None, all_but=None): if all_but is not None: if isinstance(all_but, (list, set, tuple)): keep_utils = ALL_UTILS - set(all_but) else: keep_utils = ALL_UTILS - {all_but} keep_utils = keep_utils or [] created_utils = set() rm_path = False if keep_utils: if path is None: path = tempfile.mkdtemp(prefix="libblockdev-fake-path", dir="/tmp") rm_path = True for util in keep_utils: util_path = GLib.find_program_in_path(util) if util_path: os.symlink(util_path, os.path.join(path, util)) created_utils.add(util) old_path = os.environ.get("PATH", "") os.environ["PATH"] = path or "" try: yield finally: os.environ["PATH"] = old_path for util in created_utils: os.unlink(os.path.join(path, util)) if rm_path: os.rmdir(path) def _delete_backstore(name): status = subprocess.call(["targetcli", "/backstores/fileio/ delete %s" % name], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to delete the '%s' fileio backstore" % name) def _delete_target(wwn, backstore=None): status = subprocess.call(["targetcli", "/loopback delete %s" % wwn], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to delete the '%s' loopback device" % wwn) if backstore is not None: _delete_backstore(backstore) def _delete_lun(wwn, delete_target=True, backstore=None): status = subprocess.call(["targetcli", "/loopback/%s/luns delete lun0" % wwn], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to delete the '%s' loopback device's lun0" % wwn) if delete_target: _delete_target(wwn, backstore) def _get_lio_dev_path(store_wwn, tgt_wwn, store_name, retry=True): """Check if the lio device has been really created and is in /dev/disk/by-id""" # the backstore's wwn contains '-'s we need to get rid of and then take just # the fist 25 characters which participate in the device's ID wwn = store_wwn.replace("-", "") wwn = wwn[:25] globs = glob.glob("/dev/disk/by-id/wwn-*%s" % wwn) if len(globs) != 1: if retry: time.sleep(3) os.system("udevadm settle") return _get_lio_dev_path(store_wwn, tgt_wwn, store_wwn, False) else: _delete_target(tgt_wwn, store_name) raise RuntimeError("Failed to identify the resulting device for '%s'" % store_name) else: return os.path.realpath(globs[0]) def create_lio_device(fpath, block_size=0): """ Creates a new LIO loopback device (using targetcli) on top of the :param:`fpath` backing file. :param str fpath: path of the backing file :returns: path of the newly created device (e.g. "/dev/sdb") :rtype: str """ # "register" the backing file as a fileio backstore store_name = os.path.basename(fpath) status = subprocess.call(["targetcli", "/backstores/fileio/ create %s %s" % (store_name, fpath)], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to register '%s' as a fileio backstore" % fpath) out = subprocess.check_output(["targetcli", "/backstores/fileio/%s info" % store_name]) out = out.decode("utf-8") store_wwn = None for line in out.splitlines(): if line.startswith("wwn: "): store_wwn = line[5:] if store_wwn is None: raise RuntimeError("Failed to determine '%s' backstore's wwn" % store_name) # set the optimal alignment because the default is weird and our # partitioning tests expect 2048 status = subprocess.call(["targetcli", "/backstores/fileio/%s set attribute optimal_sectors=2048" % store_name], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to set optimal alignment for '%s'" % store_name) # set sector/block size if requested if block_size: status = subprocess.call(["targetcli", "/backstores/fileio/%s set attribute block_size=%d" % (store_name, block_size)], stdout=DEVNULL) if status != 0: raise RuntimeError("Failed to set block size for '%s'" % store_name) # create a new loopback device out = subprocess.check_output(["targetcli", "/loopback create"]) out = out.decode("utf-8") match = re.match(r'Created target (.*).', out) if match: tgt_wwn = match.groups()[0] else: _delete_backstore(store_name) raise RuntimeError("Failed to create a new loopback device") with udev_settle(): status = subprocess.call(["targetcli", "/loopback/%s/luns create /backstores/fileio/%s" % (tgt_wwn, store_name)], stdout=DEVNULL) if status != 0: _delete_target(tgt_wwn, store_name) raise RuntimeError("Failed to create a new LUN for '%s' using '%s'" % (tgt_wwn, store_name)) dev_path = _get_lio_dev_path(store_wwn, tgt_wwn, store_name) _lio_devs[dev_path] = (tgt_wwn, store_name) return dev_path def delete_lio_device(dev_path): """ Delete a previously setup/created LIO device :param str dev_path: path of the device to delete """ if dev_path in _lio_devs: wwn, store_name = _lio_devs[dev_path] _delete_lun(wwn, True, store_name) else: raise RuntimeError("Unknown device '%s'" % dev_path) def find_nvme_ctrl_devs_for_subnqn(subnqn): """ Find NVMe controller devices for the specified subsystem nqn :param str subnqn: subsystem nqn """ def _check_subsys(subsys, dev_paths): if subsys['SubsystemNQN'] == subnqn: for ctrl in subsys['Controllers']: if ctrl['Transport'] != 'loop': continue path = os.path.join('/dev/', ctrl['Controller']) try: st = os.lstat(path) # nvme controller node is a character device if stat.S_ISCHR(st.st_mode): dev_paths += [path] except: pass ret, out, err = run_command("nvme list --output-format=json --verbose") if ret != 0: raise RuntimeError("Error getting NVMe list: '%s %s'" % (out, err)) decoder = json.JSONDecoder() decoded = decoder.decode(out) if not decoded or 'Devices' not in decoded: return [] dev_paths = [] for dev in decoded['Devices']: # nvme-cli 2.x if 'Subsystems' in dev: for subsys in dev['Subsystems']: _check_subsys(subsys, dev_paths) # nvme-cli 1.x if 'SubsystemNQN' in dev: _check_subsys(dev, dev_paths) return dev_paths def find_nvme_ns_devs_for_subnqn(subnqn): """ Find NVMe namespace block devices for the specified subsystem nqn :param str subnqn: subsystem nqn """ def _check_namespaces(node, ns_dev_paths): for ns in node['Namespaces']: path = os.path.join('/dev/', ns['NameSpace']) try: st = os.lstat(path) if stat.S_ISBLK(st.st_mode): ns_dev_paths += [path] except: pass def _check_subsys(subsys, ns_dev_paths): if subsys['SubsystemNQN'] == subnqn: if 'Namespaces' in subsys: _check_namespaces(subsys, ns_dev_paths) # kernel 4.18 if 'Controllers' in subsys: for ctrl in subsys['Controllers']: if 'Namespaces' in ctrl: _check_namespaces(ctrl, ns_dev_paths) ret, out, err = run_command("nvme list --output-format=json --verbose") if ret != 0: raise RuntimeError("Error getting NVMe list: '%s %s'" % (out, err)) decoder = json.JSONDecoder() decoded = decoder.decode(out) if not decoded or 'Devices' not in decoded: return [] ns_dev_paths = [] for dev in decoded['Devices']: # nvme-cli 2.x if 'Subsystems' in dev: for subsys in dev['Subsystems']: _check_subsys(subsys, ns_dev_paths) # nvme-cli 1.x if 'SubsystemNQN' in dev: _check_subsys(dev, ns_dev_paths) return ns_dev_paths def get_nvme_hostnqn(): """ Retrieves NVMe host NQN string from /etc/nvme/hostnqn or uses nvme-cli to generate new one (stable, typically generated from machine DMI data) when not available. """ hostnqn = None try: hostnqn = read_file('/etc/nvme/hostnqn') except: pass if hostnqn is None or len(hostnqn.strip()) < 1: ret, hostnqn, err = run_command('nvme gen-hostnqn') if ret != 0: raise RuntimeError("Cannot get host NQN: '%s %s'" % (hostnqn, err)) return hostnqn.strip() def setup_nvme_target(dev_paths, subnqn): """ Sets up a new NVMe target loop device (using nvmetcli) on top of the :param:`dev_paths` backing block devices. :param set dev_paths: set of backing block device paths :param str subnqn: Subsystem NQN """ # modprobe required nvme target modules for module in ['nvmet', 'nvme-loop']: ret, out, err = run_command("modprobe %s" % module) if ret != 0: raise RuntimeError("Cannot load required module %s: '%s %s'" % (module, out, err)) # create a JSON file for nvmetcli with tempfile.NamedTemporaryFile(mode='wt',delete=False) as tmp: tcli_json_file = tmp.name namespaces = ",".join([""" {{ "device": {{ "nguid": "{nguid}", "path": "{path}" }}, "enable": 1, "nsid": {nsid} }} """.format(nguid=uuid.uuid4(), path=dev_path, nsid=i) for i, dev_path in enumerate(dev_paths, start=1)]) json = """ { "ports": [ { "addr": { "adrfam": "", "traddr": "", "treq": "not specified", "trsvcid": "", "trtype": "loop" }, "portid": 1, "referrals": [], "subsystems": [ "%s" ] } ], "subsystems": [ { "attr": { "allow_any_host": "1" }, "namespaces": [ %s ], "nqn": "%s" } ] } """ tmp.write(json % (subnqn, namespaces, subnqn)) # export the loop device on the target ret, out, err = run_command("nvmetcli restore %s" % tcli_json_file) os.unlink(tcli_json_file) if ret != 0: raise RuntimeError("Error setting up the NVMe target: '%s %s'" % (out, err)) def teardown_nvme_target(): """ Tear down any previously set up kernel nvme target. """ ret, out, err = run_command("nvmetcli clear") if ret != 0: raise RuntimeError("Error clearing the NVMe target: '%s %s'" % (out, err)) def create_nvmet_device(dev_path): """ Creates a new NVMe target loop device (using nvmetcli) on top of the :param:`dev_path` backing block device and initiates a connection to it. :param str dev_path: backing block device path :returns: path of the NVMe controller device (e.g. "/dev/nvme0") :rtype: str """ SUBNQN = 'libblockdev_subnqn' setup_nvme_target([dev_path], SUBNQN) # connect initiator to the newly created target (ret, out, err) = run_command("nvme connect --transport=loop --nqn=%s" % SUBNQN) if ret != 0: raise RuntimeError("Error connecting to the NVMe target: '%s %s'" % (out, err)) nvme_devs = find_nvme_ctrl_devs_for_subnqn(SUBNQN) if len(nvme_devs) != 1: raise RuntimeError("Error looking up block device for the '%s' nqn" % SUBNQN) _nvmet_devs[nvme_devs[0]] = (SUBNQN, dev_path) return nvme_devs[0] def delete_nvmet_device(nvme_dev): """ Logout and tear down previously created NVMe target device. :param str nvme_dev: path of the NVMe device to delete """ if nvme_dev in _nvmet_devs: subnqn, dev_path = _nvmet_devs[nvme_dev] # disconnect the initiator ret, out, err = run_command("nvme disconnect --nqn=%s" % subnqn) if ret != 0: raise RuntimeError("Error disconnecting the '%s' nqn: '%s %s'" % (subnqn, out, err)) # clear the target teardown_nvme_target() else: raise RuntimeError("Unknown device '%s'" % nvme_dev) def read_file(filename): with open(filename, "r") as f: content = f.read() return content def write_file(filename, content): with open(filename, "w") as f: f.write(content) def run_command(command, cmd_input=None): res = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) out, err = res.communicate(input=cmd_input) return (res.returncode, out.decode().strip(), err.decode().strip()) def get_version_from_lsb(): ret, out, err = run_command("lsb_release -rs") if ret != 0: raise RuntimeError("Cannot get distro version from lsb_release output: '%s %s'" % (out, err)) return out.split(".")[0] def get_version_from_pretty_name(pretty_name): """ Try to get distro and version from 'OperatingSystemPrettyName' hostname property. It should look like this: - "Debian GNU/Linux 9 (stretch)" - "Fedora 27 (Workstation Edition)" - "CentOS Linux 7 (Core)" So just return first word as distro and first number as version. """ distro = pretty_name.split()[0].lower() match = re.search(r"\d+", pretty_name) if match is not None: version = match.group(0) else: version = get_version_from_lsb() return (distro, version) def get_version(): """ Try to get distro and version """ bus = dbus.SystemBus() # get information about the distribution from systemd (hostname1) sys_info = bus.get_object("org.freedesktop.hostname1", "/org/freedesktop/hostname1") cpe = str(sys_info.Get("org.freedesktop.hostname1", "OperatingSystemCPEName", dbus_interface=dbus.PROPERTIES_IFACE)) if cpe: # 2nd to 4th fields from e.g. "cpe:/o:fedoraproject:fedora:25" or "cpe:/o:redhat:enterprise_linux:7.3:GA:server" _project, distro, version = tuple(cpe.split(":")[2:5]) # we want just the major version, so remove all decimal places (if any) version = str(int(float(version))) else: pretty_name = str(sys_info.Get("org.freedesktop.hostname1", "OperatingSystemPrettyName", dbus_interface=dbus.PROPERTIES_IFACE)) distro, version = get_version_from_pretty_name(pretty_name) return (distro, version) def skip_on(skip_on_distros=None, skip_on_version="", skip_on_arch="", reason=""): """A function returning a decorator to skip some test on a given distribution-version combination :param skip_on_distros: distro(s) to skip the test on :type skip_on_distros: str or tuple of str :param str skip_on_version: version of distro(s) to skip the tests on (only checked on distribution match) """ if isinstance(skip_on_distros, str): skip_on_distros = (skip_on_distros,) distro, version = get_version() arch = os.uname()[-1] def decorator(func): if (skip_on_distros is None or distro in skip_on_distros) and (not skip_on_version or skip_on_version == version) and \ (not skip_on_arch or skip_on_arch == arch): msg = "not supported on this distribution in this version and arch" + (": %s" % reason if reason else "") return unittest.skip(msg)(func) else: return func return decorator def required_plugins(plugins): def decorator(func): try: from config_h import ENABLED_PLUGINS except ImportError: # config_h doesn't exist -> we're running tests against installed libblockdev return func unavail = [p for p in plugins if p not in ENABLED_PLUGINS] if unavail: msg = "Skipping, libblockdev was compiled without plugins required for this test case: %s" % ", ".join(unavail) return unittest.skip(msg)(func) return func return decorator # taken from libbytesize's tests/locale_utils.py def get_avail_locales(): return {loc.decode(errors="replace").strip() for loc in subprocess.check_output(["locale", "-a"]).split()} def requires_locales(locales): """A decorator factory to skip tests that require unavailable locales :param set locales: set of required locales **Requires the test to have the set of available locales defined as its ``avail_locales`` attribute.** """ canon_locales = {loc.replace("UTF-8", "utf8") for loc in locales} def decorator(test_method): def decorated(test, *args): missing = canon_locales - set(test.avail_locales) if missing: test.skipTest("requires missing locales: %s" % missing) else: return test_method(test, *args) return decorated return decorator # taken from udisks2/src/tests/dbus-tests/udiskstestcase.py def unstable_test(test): """Decorator for unstable tests Failures of tests decorated with this decorator are silently ignored unless the ``UNSTABLE_TESTS_FATAL`` environment variable is defined. """ def decorated_test(*args): try: test(*args) except unittest.SkipTest: # make sure skipped tests are just skipped as usual raise except: # and swallow everything else, just report a failure of an unstable # test, unless told otherwise if "UNSTABLE_TESTS_FATAL" in os.environ: raise print("unstable-fail...", end="", file=sys.stderr) return decorated_test class TestTags(Enum): ALL = "all" # "default" tag for running all tests SLOW = "slow" # slow tests UNSTABLE = "unstable" # randomly failing tests UNSAFE = "unsafe" # tests that change system configuration CORE = "core" # tests covering core functionality NOSTORAGE = "nostorage" # tests that don't work with storage EXTRADEPS = "extradeps" # tests that require special configuration and/or device to run REGRESSION = "regression" # regression tests SOURCEONLY = "sourceonly" # tests that can't run against installed library @classmethod def get_tags(cls): return [t.value for t in cls.__members__.values()] @classmethod def get_tag_by_value(cls, value): tag = next((t for t in cls.__members__.values() if t.value == value), None) if not tag: raise ValueError('Unknown value "%s"' % value) return tag def tag_test(*tags): def decorator(func): func.slow = TestTags.SLOW in tags func.unstable = TestTags.UNSTABLE in tags func.unsafe = TestTags.UNSAFE in tags func.core = TestTags.CORE in tags func.nostorage = TestTags.NOSTORAGE in tags func.extradeps = TestTags.EXTRADEPS in tags func.regression = TestTags.REGRESSION in tags func.sourceonly = TestTags.SOURCEONLY in tags return func return decorator def run(cmd_string): """ Run the a command with file descriptors closed as lvm is trying to make sure everyone else is following best practice and not leaking FDs. """ return subprocess.call(cmd_string, close_fds=True, shell=True) def mount(device, where, ro=False): if not os.path.isdir(where): os.makedirs(where) if ro: os.system("mount -oro %s %s" % (device, where)) else: os.system("mount %s %s" % (device, where)) def umount(what, retry=True): try: os.system("umount -A -l %s >/dev/null 2>&1" % what) os.rmdir(what) except OSError as e: # retry the umount if the device is busy if "busy" in str(e) and retry: time.sleep(2) umount(what, False)