def list_partitions(device):
"""Get partitions information from given device.
:param device: The device path.
:returns: list of dictionaries (one per partition) with keys:
number, start, end, size (in MiB), filesystem, flags
"""
output = utils.execute(
'parted', '-s', '-m', device, 'unit', 'MiB', 'print',
use_standard_locale=True, run_as_root=True)[0]
if isinstance(output, bytes):
output = output.decode("utf-8")
lines = [line for line in output.split('\n') if line.strip()][2:]
# Example of line: 1:1.00MiB:501MiB:500MiB:ext4::boot
fields = ('number', 'start', 'end', 'size', 'filesystem', 'flags')
result = []
for line in lines:
match = _PARTED_PRINT_RE.match(line)
if match is None:
LOG.warn(_LW("Partition information from parted for device "
"%(device)s does not match "
"expected format: %(line)s"),
dict(device=device, line=line))
continue
# Cast int fields to ints (some are floats and we round them down)
groups = [int(float(x)) if i < 4 else x
for i, x in enumerate(match.groups())]
result.append(dict(zip(fields, groups)))
return result
def _wait_for_disk_to_become_available(self, retries, max_retries, pids,
stderr):
retries[0] += 1
if retries[0] > max_retries:
raise loopingcall.LoopingCallDone()
try:
# NOTE(ifarkas): fuser returns a non-zero return code if none of
# the specified files is accessed
out, err = utils.execute('fuser',
self._device,
check_exit_code=[0, 1],
run_as_root=True)
if not out and not err:
raise loopingcall.LoopingCallDone()
else:
if err:
stderr[0] = err
if out:
pids_match = re.search(self._fuser_pids_re, out)
pids[0] = pids_match.group()
except processutils.ProcessExecutionError as exc:
LOG.warning(
_LW('Failed to check the device %(device)s with fuser:'******' %(err)s'), {
'device': self._device,
'err': exc
})
def unlink_without_raise(path):
try:
os.unlink(path)
except OSError as e:
if e.errno == errno.ENOENT:
return
else:
LOG.warn(_LW("Failed to unlink %(path)s, error: %(e)s"),
{'path': path, 'e': e})
def unlink_without_raise(path):
try:
os.unlink(path)
except OSError as e:
if e.errno == errno.ENOENT:
return
else:
LOG.warn(_LW("Failed to unlink %(path)s, error: %(e)s"), {
'path': path,
'e': e
})
def _wait_for_disk_to_become_available(self, retries, max_retries, pids,
stderr):
retries[0] += 1
if retries[0] > max_retries:
raise loopingcall.LoopingCallDone()
try:
# NOTE(ifarkas): fuser returns a non-zero return code if none of
# the specified files is accessed
out, err = utils.execute('fuser', self._device,
check_exit_code=[0, 1], run_as_root=True)
if not out and not err:
raise loopingcall.LoopingCallDone()
else:
if err:
stderr[0] = err
if out:
pids_match = re.search(self._fuser_pids_re, out)
pids[0] = pids_match.group()
except processutils.ProcessExecutionError as exc:
LOG.warning(_LW('Failed to check the device %(device)s with fuser:'******' %(err)s'), {'device': self._device, 'err': exc})
def list_partitions(device):
"""Get partitions information from given device.
:param device: The device path.
:returns: list of dictionaries (one per partition) with keys:
number, start, end, size (in MiB), filesystem, flags
"""
output = utils.execute('parted',
'-s',
'-m',
device,
'unit',
'MiB',
'print',
use_standard_locale=True,
run_as_root=True)[0]
if isinstance(output, bytes):
output = output.decode("utf-8")
lines = [line for line in output.split('\n') if line.strip()][2:]
# Example of line: 1:1.00MiB:501MiB:500MiB:ext4::boot
fields = ('number', 'start', 'end', 'size', 'filesystem', 'flags')
result = []
for line in lines:
match = _PARTED_PRINT_RE.match(line)
if match is None:
LOG.warn(
_LW("Partition information from parted for device "
"%(device)s does not match "
"expected format: %(line)s"), dict(device=device,
line=line))
continue
# Cast int fields to ints (some are floats and we round them down)
groups = [
int(float(x)) if i < 4 else x for i, x in enumerate(match.groups())
]
result.append(dict(zip(fields, groups)))
return result
