def scan_vg_entries(bu_vg):
"""
Probe LVM VG bu_vg for filesystems, disk images and others
return a list of LVMBackupGroups
"""
def add_bu_entry(bu_group, path, fst, is_mapping=False):
assert isinstance(bu_group, BackupGroup)
tmp = BackupEntry(path, fst, needs_mapping=is_mapping)
bu_group.add_entry(tmp)
bu_group_list = set()
for entry in os.listdir(os.path.join("/dev", bu_vg)):
entry = os.path.join("/dev", bu_vg, entry)
tmp_bu_group = LVMBackupGroup(os.path.basename(entry), bu_vg)
fst = get_fstype(entry)
if fst is not None:
add_bu_entry(tmp_bu_group, entry, fst)
else:
pt_entries = partition.get_pt_entries(entry)
pt_mappings = partition.create_mappings(entry, pt_entries)
for subentry in pt_mappings:
prefix, name = subentry
fst = get_fstype("/dev/mapper/" + prefix + name)
if fst is not None:
add_bu_entry(tmp_bu_group, name, fst, is_mapping=True)
partition.remove_mappings(pt_mappings)
bu_group_list.add(tmp_bu_group)
return bu_group_list
def _create_mappings(self):
"""
Create mappings for partition table entries via dmsetup
"""
if len(self._pt_entries) == 0:
return
print "creating mappings on", self._parent_dev
pt_mappings = partition.create_mappings(self.parent_dev, self._pt_entries)
prefix = pt_mappings[0][0]
for entry in self.__bu_list:
entry.set_dmprefix(prefix)
self.__pt_mappings = pt_mappings
