def majorminor(self):
"""A string suitable for using as a pseudo-unique ID in kickstart."""
# If this is a device-mapper device, we have to get the DM node and
# build the sysfs path from that.
try:
device = dm_node_from_name(self.device)
except DMError:
device = self.device
sysfs_path = get_sysfs_path_by_name(device)
dev = udev_get_device(sysfs_path[4:])
return "%03d%03d" % (udev_device_get_major(dev),
udev_device_get_minor(dev))
def majorminor(self):
"""A string suitable for using as a pseudo-unique ID in kickstart."""
if not self._majorminor:
# If this is a device-mapper device, we have to get the DM node and
# build the sysfs path from that.
try:
device = dm_node_from_name(self.device)
except DMError:
device = self.device
try:
sysfs_path = get_sysfs_path_by_name(device)
except RuntimeError:
raise StorageError("DeviceFormat.majorminor: "
"can not get majorminor for '%s'" % device)
dev = udev_get_device(sysfs_path[4:])
self._majorminor = "%03d%03d" %\
(udev_device_get_major(dev), udev_device_get_minor(dev))
return self._majorminor
def notifyKernel(self):
log_method_call(self, device=self.device, type=self.type)
if not self.device:
return
if self.device.startswith("/dev/mapper/"):
try:
name = dm_node_from_name(os.path.basename(self.device))
except Exception, e:
log.warning("failed to get dm node for %s" % self.device)
return
else:
name = self.device
path = get_sysfs_path_by_name(name)
try:
notify_kernel(path, action="change")
except Exception, e:
log.warning("failed to notify kernel of change: %s" % e)
def create(self, *args, **kwargs):
log_method_call(self,
device=self.device,
type=self.type,
status=self.status)
# allow late specification of device path
device = kwargs.get("device")
if device:
self.device = device
def notifyKernel(self):
log_method_call(self, device=self.device,
type=self.type)
if not self.device:
return
if self.device.startswith("/dev/mapper/"):
try:
name = dm_node_from_name(os.path.basename(self.device))
except Exception, e:
log.warning("failed to get dm node for %s" % self.device)
return
else:
name = self.device
path = get_sysfs_path_by_name(name)
try:
notify_kernel(path, action="change")
except Exception, e:
log.warning("failed to notify kernel of change: %s" % e)
def cacheMajorminor(self):
""" Cache the value of self.majorminor.
Once a device node of this format's device disappears (for instance
after a teardown), it is no longer possible to figure out the value
of self.majorminor pseudo-unique string. Call this method before
that happens for caching this.
"""
self._majorminor = None
try:
