def umount_all(target):
"""Umount all file systems that are mounted under the target directory"""
mpoints = []
for entry in read_fstable('/proc/mounts'):
if entry.mpoint.startswith(os.path.abspath(target)):
mpoints.append(entry.mpoint)
mpoints.sort()
for mpoint in reversed(mpoints):
try_fail_repeat(umount, mpoint)
def unmap_partition(dev):
"""Unmap a previously mapped partition"""
if not os.path.exists(dev):
return
try_fail_repeat(dmsetup, 'remove', dev.split('/dev/mapper/')[1])
