def mount_partition(devname, mountpoint=None):
"""
Create the mountpoint /mnt/<last part of device specification> and mount a
partition on on this mountpoint.
Parameters
----------
devname: str
The full path of the device.
mountpoint: str
The mountpoint, will be generated if not provided.
Returns
-------
str: The mounted partition on Success, None otherwise.
"""
_logger.debug('__ Mount partition %s.', devname)
#
# create mountpoint /mnt/<devname> if not specified.
if mountpoint is None:
mntpoint = migrate_data.loopback_root + '/' + devname.rsplit('/')[-1]
_logger.debug('Loopback mountpoint: %s', mntpoint)
try:
if system_tools.exec_mkdir(mntpoint):
_logger.debug('Mountpoint: %s created.', mntpoint)
except Exception as e:
_logger.critical(' Failed to create mountpoint %s: %s', mntpoint, str(e))
raise OciMigrateException('Failed to create mountpoint %s:' % mntpoint) from e
else:
mntpoint = mountpoint
#
# actual mount
cmd = ['mount', devname, mntpoint]
pause_msg(cmd, pause_flag='_OCI_MOUNT')
_, nbcols = terminal_dimension()
try:
mountpart = ProgressBar(nbcols, 0.2,
progress_chars=['mount %s' % devname])
mountpart.start()
_logger.debug('command: %s', cmd)
cmdret = system_tools.run_call_cmd(cmd)
if cmdret == 0:
_logger.debug('%s mounted on %s.', devname, mntpoint)
return mntpoint
raise Exception('Mount %s failed: %d' % (devname, cmdret))
except Exception as e:
#
# mount failed, need to remove mountpoint.
_logger.critical(' Failed to mount %s, missing driver, filesystem corruption...: %s', devname, str(e))
if mountpoint is None:
if system_tools.exec_rmdir(mntpoint):
_logger.debug('%s removed', mntpoint)
else:
_logger.critical(' Failed to remove mountpoint %s', mntpoint)
finally:
if system_tools.is_thread_running(mountpart):
mountpart.stop()
return None
def unmount_part(devname):
"""
Unmount a partition from mountpoint from /mnt/<last part of device
specification> and remove the mountpoint.
Parameters
----------
devname: str
The full path of the device.
Returns
-------
bool
True on success, False otherwise.
"""
mntpoint = migrate_data.loopback_root + '/' + devname.rsplit('/')[-1]
cmd = ['umount', mntpoint]
_logger.debug('__ Running %s' % cmd)
pause_msg(cmd)
while True:
try:
_logger.debug('command: %s' % cmd)
cmdret = system_tools.run_call_cmd(cmd)
if cmdret == 0:
_logger.debug('%s unmounted from %s' % (devname, mntpoint))
#
# remove mountpoint
if system_tools.exec_rmdir(mntpoint):
_logger.debug('%s removed' % mntpoint)
return True
else:
_logger.critical(' Failed to remove mountpoint %s' %
mntpoint)
raise OciMigrateException(
'Failed to remove mountpoint %s' % mntpoint)
else:
_logger.critical(' Failed to unmount %s: %d' %
(devname, cmdret))
console_msg('Failed to unmount %s, error code %d.\n '
'Please verify before continuing.' %
(devname, cmdret))
retry = read_yn(
'Something prevented to complete %s, please '
'verify and correct if possible. '
'Press Y to retry, N to ignore.',
waitenter=True)
if not retry:
break
except Exception as e:
_logger.critical(' Failed to unmount %s: %s' % (devname, str(e)))
return False
