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utils_libvirt/libvirt_disk: add function to get disk by serial #3811

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utils_libvirt/libvirt_disk: add function to get disk by serial #3811

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25 changes: 25 additions & 0 deletions virttest/utils_libvirt/libvirt_disk.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,31 @@
LOG = logging.getLogger('avocado.' + __name__)


def get_disk_by_serial(session, serial):
"""
Gets the disk by its serial value

:param session: VM session
:param serial: The expected serial value
:return path: absolute path of disk
e.g. /dev/sda
:raises TestError: If the disk cannot be found.
"""
cmd = "lsblk -n -p -l -o NAME,SERIAL"
s, o = utils_misc.cmd_status_output(cmd,
ignore_status=False,
shell=True,
verbose=True,
session=session)
if s:
raise exceptions.TestError("Couldn't list block devices: '%s'" % o)
for line in o.split("\n"):
match = re.match(r'(/dev/[a-z]+)[\s\t]+%s' % serial, line)
if match:
return match.groups()[0]
raise exceptions.TestError("Couldn't find new disk in:\n%s" % o)


def create_disk(disk_type, path=None, size="500M", disk_format="raw", extra='',
session=None):
"""
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