def get_disk_identifier(self, device_filepath):
"""parse Disk identifier: 0x0001ab30"""
id_re = re.compile("^Disk\s+identifier:\s(?P<identifier>\w+)")
for line in run_cmd(SIZE_FROM_FDISK + [device_filepath]).splitlines():
match = id_re.match(line)
if match:
return match.group("identifier").strip()
return None
def _extract_relevant_device_lines_from_multipath(self, device_name):
device_re = re.compile("(?P<device_name>\w+)\s+\(\w+\)\s+dm-\d+")
lines = []
device_found = False
for line in run_cmd(MULTIPATH_LIST).strip().splitlines():
m = device_re.search(line)
if m:
if m.group("device_name") == device_name:
device_found = True
else:
device_found = False
if device_found:
lines.append(line.strip())
return lines
def _extract_uuid_from_blkid(self, device_filepath):
uuid_re = re.compile("^UUID=(?P<uuid>.*)$")
try:
output = run_cmd(BLKID + [device_filepath]).splitlines()
except CalledProcessError as e:
if e.returncode == 2:
# blkid exit code is 2 if no uuid for that device
return None
raise
for line in output:
m = uuid_re.match(line)
if m is not None:
return m.group("uuid")
return None
def _extract_size_from_fdisk(self, device_filepath):
"""/dev/sd* or /dev/mapper/mpath*
:returns: The size in bytes of the specified device
:rtype: int or None if an error occured obtaining the value
"""
#parse Disk /dev/sda: 8185 MB, 8185184256 bytes
dev_re = re.compile("^Disk\s\/dev\/(sd|mapper\/).*:")
for line in run_cmd(SIZE_FROM_FDISK + [device_filepath]).splitlines():
if dev_re.match(line) is not None:
size = line.split(",")[1].split()[0]
try:
return int(size)
except ValueError:
module_logger.warning("Cannot get size for device {0}.\
Output: {1}".format(device_filepath, size))
return None
return None
def get_multipath_disks_details(self):
dm_re = re.compile("\sdm-\d+\s")
mp_disk_details = {}
for line in run_cmd(MULTIPATH_LIST).splitlines():
if dm_re.search(line):
try:
alias, wwid, sysfs_name, vendor = line.split()[0:4]
except ValueError:
# apparently we hit a dead/unmapped device
module_logger.warning('Skipping MP disk details in line {0}'.format(
line))
continue
mp_disk_details[alias] = LinuxDMPDiskDetails(
wwid = wwid.strip("()"),
vendor = vendor,
sysfs_name = sysfs_name,
alias = alias
)
return mp_disk_details