# devicetree.py # Device management for anaconda's storage configuration module. # # Copyright (C) 2009 Red Hat, Inc. # # This copyrighted material is made available to anyone wishing to use, # modify, copy, or redistribute it subject to the terms and conditions of # the GNU General Public License v.2, or (at your option) any later version. # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY expressed or implied, including the implied warranties of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General # Public License for more details. You should have received a copy of the # GNU General Public License along with this program; if not, write to the # Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. Any Red Hat trademarks that are incorporated in the # source code or documentation are not subject to the GNU General Public # License and may only be used or replicated with the express permission of # Red Hat, Inc. # # Red Hat Author(s): Dave Lehman # import os import stat import block import re from errors import * from devices import * from deviceaction import * from partitioning import shouldClear from pykickstart.constants import * import formats import devicelibs.mdraid import devicelibs.dm import devicelibs.lvm import devicelibs.mpath from udev import * from .storage_log import log_method_call import iutil import platform import parted import _ped import block import gettext _ = lambda x: gettext.ldgettext("anaconda", x) import logging log = logging.getLogger("storage") def getLUKSPassphrase(intf, device, globalPassphrase): """ Obtain a passphrase for a LUKS encrypted block device. The format's mapping name must already be set and the backing device must already be set up before calling this function. If successful, this function leaves the device mapped. Return value is a two-tuple: (passphrase, isglobal) passphrase is the passphrase string, if obtained isglobal is a boolean indicating whether the passphrase is global Either or both can be None, depending on the outcome. """ if device.format.type != "luks": # this function only works on luks devices raise ValueError("not a luks device") if not device.status: # the device should have already been set up raise RuntimeError("device is not set up") if device.format.status: # the device is already mapped raise RuntimeError("device is already mapped") if not device.format.configured and globalPassphrase: # try the given passphrase first device.format.passphrase = globalPassphrase try: device.format.setup() except CryptoError as e: device.format.passphrase = None else: # we've opened the device so we're done. return (globalPassphrase, False) if not intf: return (None, None) buttons = [_("Back"), _("Continue")] passphrase_incorrect = False while True: if passphrase_incorrect: # TODO: add a flag to passphraseEntryWindow to say the last # passphrase was incorrect so try again passphrase_incorrect = False (passphrase, isglobal) = intf.passphraseEntryWindow(device.name) if not passphrase: rc = intf.messageWindow(_("Confirm"), _("Are you sure you want to skip " "entering a passphrase for device " "%s?\n\n" "If you skip this step the " "device's contents will not " "be available during " "installation.") % device.name, type = "custom", default = 0, custom_buttons = buttons) if rc == 0: continue else: passphrase = None isglobal = None log.info("skipping passphrase for %s" % (device.name,)) break device.format.passphrase = passphrase try: device.format.setup() except CryptoError as e: device.format.passphrase = None passphrase_incorrect = True else: # we've opened the device so we're done. break return (passphrase, isglobal) class DeviceTree(object): """ A quasi-tree that represents the devices in the system. The tree contains a list of device instances, which does not necessarily reflect the actual state of the system's devices. DeviceActions are used to perform modifications to the tree, except when initially populating the tree. DeviceAction instances are registered, possibly causing the addition or removal of Device instances to/from the tree. The DeviceActions are all reversible up to the time their execute method has been called. Only one action of any given type/object pair should exist for any given device at any given time. DeviceAction instances can only be registered for leaf devices, except for resize actions. """ def __init__(self, intf=None, ignored=[], exclusive=[], type=CLEARPART_TYPE_NONE, clear=[], zeroMbr=None, reinitializeDisks=None, protected=[], passphrase=None, luksDict=None, iscsi=None, dasd=None, mpathFriendlyNames=True, cdl=False): # internal data members self._devices = [] self._actions = [] # indicates whether or not the tree has been fully populated self.populated = False self.intf = intf self.exclusiveDisks = exclusive self.clearPartType = type self.clearPartDisks = clear self.zeroMbr = zeroMbr self.cdl = cdl self.reinitializeDisks = reinitializeDisks self.iscsi = iscsi self.dasd = dasd self.platform = platform.getPlatform(None) self.mpathFriendlyNames = mpathFriendlyNames # protected device specs as provided by the user self.protectedDevSpecs = protected # names of protected devices at the time of tree population self.protectedDevNames = [] self.unusedRaidMembers = [] self.__multipaths = {} self.__multipathConfigWriter = devicelibs.mpath.MultipathConfigWriter() self.__passphrase = passphrase self.__luksDevs = {} if luksDict and isinstance(luksDict, dict): self.__luksDevs = luksDict self._ignoredDisks = [] for disk in ignored: self.addIgnoredDisk(disk) lvm.lvm_cc_resetFilter() def addIgnoredDisk(self, disk): self._ignoredDisks.append(disk) lvm.lvm_cc_addFilterRejectRegexp(disk) def pruneActions(self): """ Prune loops and redundant actions from the queue. """ # handle device destroy actions actions = self.findActions(type="destroy", object="device") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) destroys = self.findActions(devid=a.device.id, type="destroy", object="device") creates = self.findActions(devid=a.device.id, type="create", object="device") log.debug("found %d create and %d destroy actions for device id %d" % (len(creates), len(destroys), a.device.id)) # If the device is not preexisting, we remove all actions up # to and including the last destroy action. # If the device is preexisting, we remove all actions from # after the first destroy action up to and including the last # destroy action. # If the device is preexisting and there is only one device # destroy action we remove all resize and format create/migrate # actions on that device that precede the destroy action. loops = [] first_destroy_idx = None first_create_idx = None stop_action = None start = None if len(destroys) > 1: # there are multiple destroy actions for this device loops = destroys first_destroy_idx = self._actions.index(loops[0]) start = self._actions.index(a) + 1 stop_action = destroys[-1] if creates: first_create_idx = self._actions.index(creates[0]) if not loops or first_destroy_idx > first_create_idx: # this device is not preexisting start = first_create_idx stop_action = destroys[-1] prune_actions = self.findActions(devid=a.device.id) if start is None: # only one device destroy, so prune preceding resizes and format # creates and migrates and the destroy itself if the device # doesn't exist for act in prune_actions[:]: if act.isResize() or \ (act.isFormat() and not act.isDestroy()) or \ (act.isDestroy() and not act.device.exists): continue prune_actions.remove(act) if not prune_actions: # nothing to prune continue start = self._actions.index(prune_actions[0]) stop_action = prune_actions[-1] # now we remove all actions on this device between the start # index (into self._actions) and stop_action. for rem in prune_actions: end = self._actions.index(stop_action) if start <= self._actions.index(rem) <= end: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) if rem == stop_action: break # device create actions actions = self.findActions(type="create", object="device") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) creates = self.findActions(devid=a.device.id, type="create", object="device") destroys = self.findActions(devid=a.device.id, type="destroy", object="device") # If the device is preexisting, we remove everything between # the first destroy and the last create. # If the device is not preexisting, we remove everything up to # the last create. loops = [] first_destroy_idx = None first_create_idx = None stop_action = None start = None if len(creates) > 1: # there are multiple create actions for this device loops = creates first_create_idx = self._actions.index(loops[0]) start = 0 stop_action = creates[-1] if destroys: first_destroy_idx = self._actions.index(destroys[0]) if not loops or first_create_idx > first_destroy_idx: # this device is preexisting start = first_destroy_idx + 1 stop_action = creates[-1] if start is None: continue # remove all actions on this from after the first destroy up # to the last create prune_actions = self.findActions(devid=a.device.id) for rem in prune_actions: if rem == stop_action: break end = self._actions.index(stop_action) if start <= self._actions.index(rem) < end: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) # device resize actions actions = self.findActions(type="resize", object="device") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) loops = self.findActions(devid=a.device.id, type="resize", object="device") if len(loops) == 1: continue # remove all but the last resize action on this device for rem in loops[:-1]: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) # format destroy # XXX I don't think there's a way for these loops to happen actions = self.findActions(type="destroy", object="format") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) destroys = self.findActions(devid=a.device.id, type="destroy", object="format") creates = self.findActions(devid=a.device.id, type="create", object="format") # If the format is not preexisting, we remove all actions up # to and including the last destroy action. # If the format is preexisting, we remove all actions from # after the first destroy action up to and including the last # destroy action. loops = [] first_destroy_idx = None first_create_idx = None stop_action = None start = None if len(destroys) > 1: # there are multiple destroy actions for this format loops = destroys first_destroy_idx = self._actions.index(loops[0]) start = self._actions.index(a) + 1 stop_action = destroys[-1] if creates: first_create_idx = self._actions.index(creates[0]) if not loops or first_destroy_idx > first_create_idx: # this format is not preexisting start = first_create_idx stop_action = destroys[-1] if start is None: continue # now we remove all actions on this device's format between # the start index (into self._actions) and stop_action. prune_actions = self.findActions(devid=a.device.id, object="format") for rem in prune_actions: end = self._actions.index(stop_action) if start <= self._actions.index(rem) <= end: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) if rem == stop_action: break # format create # XXX I don't think there's a way for these loops to happen actions = self.findActions(type="create", object="format") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) creates = self.findActions(devid=a.device.id, type="create", object="format") destroys = self.findActions(devid=a.device.id, type="destroy", object="format") # If the format is preexisting, we remove everything between # the first destroy and the last create. # If the format is not preexisting, we remove everything up to # the last create. loops = [] first_destroy_idx = None first_create_idx = None stop_action = None start = None if len(creates) > 1: # there are multiple create actions for this format loops = creates first_create_idx = self._actions.index(loops[0]) start = 0 stop_action = creates[-1] if destroys: first_destroy_idx = self._actions.index(destroys[0]) if not loops or first_create_idx > first_destroy_idx: # this format is preexisting start = first_destroy_idx + 1 stop_action = creates[-1] if start is None: continue # remove all actions on this from after the first destroy up # to the last create dev_actions = self.findActions(devid=a.device.id, object="format") for rem in dev_actions: if rem == stop_action: break end = self._actions.index(stop_action) if start <= self._actions.index(rem) < end: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) # format resize actions = self.findActions(type="resize", object="format") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) loops = self.findActions(devid=a.device.id, type="resize", object="format") if len(loops) == 1: continue # remove all but the last resize action on this format for rem in loops[:-1]: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) # format migrate # XXX I don't think there's away for these loops to occur actions = self.findActions(type="migrate", object="format") for a in actions: if a not in self._actions: # we may have removed some of the actions in a previous # iteration of this loop continue log.debug("action '%s' (%s)" % (a, id(a))) loops = self.findActions(devid=a.device.id, type="migrate", object="format") if len(loops) == 1: continue # remove all but the last migrate action on this format for rem in loops[:-1]: log.debug(" removing action '%s' (%s)" % (rem, id(rem))) self._actions.remove(rem) def processActions(self, dryRun=None): """ Execute all registered actions. """ # in most cases the actions will already be sorted because of the # rules for registration, but let's not rely on that def cmpActions(a1, a2): ret = 0 if a1.isDestroy() and a2.isDestroy(): if a1.device.path == a2.device.path: # if it's the same device, destroy the format first if a1.isFormat() and a2.isFormat(): ret = 0 elif a1.isFormat() and not a2.isFormat(): ret = -1 elif not a1.isFormat() and a2.isFormat(): ret = 1 elif a1.device.dependsOn(a2.device): ret = -1 elif a2.device.dependsOn(a1.device): ret = 1 # generally destroy partitions after lvs, vgs, &c elif isinstance(a1.device, PartitionDevice) and \ isinstance(a2.device, PartitionDevice): if a1.device.disk == a2.device.disk: ret = cmp(a2.device.partedPartition.number, a1.device.partedPartition.number) else: ret = cmp(a2.device.name, a1.device.name) elif isinstance(a1.device, PartitionDevice) and \ a2.device.partitioned: ret = -1 elif isinstance(a2.device, PartitionDevice) and \ a1.device.partitioned: ret = 1 # remove partitions before unpartitioned non-partition # devices elif isinstance(a1.device, PartitionDevice) and \ not isinstance(a2.device, PartitionDevice): ret = 1 elif isinstance(a2.device, PartitionDevice) and \ not isinstance(a1.device, PartitionDevice): ret = -1 else: ret = 0 elif a1.isDestroy(): ret = -1 elif a2.isDestroy(): ret = 1 elif a1.isResize() and a2.isResize(): if a1.device.path == a2.device.path: if a1.obj == a2.obj: ret = 0 elif a1.isFormat() and not a2.isFormat(): # same path, one device, one format if a1.isGrow(): ret = 1 else: ret = -1 elif not a1.isFormat() and a2.isFormat(): # same path, one device, one format if a1.isGrow(): ret = -1 else: ret = 1 else: ret = cmp(a1.device.name, a2.device.name) elif a1.device.dependsOn(a2.device): if a1.isGrow(): ret = 1 else: ret = -1 elif a2.device.dependsOn(a1.device): if a1.isGrow(): ret = -1 else: ret = 1 elif isinstance(a1.device, PartitionDevice) and \ isinstance(a2.device, PartitionDevice): ret = cmp(a1.device.name, a2.device.name) else: ret = 0 elif a1.isResize(): ret = -1 elif a2.isResize(): ret = 1 elif a1.isCreate() and a2.isCreate(): if a1.device.path == a2.device.path: if a1.obj == a2.obj: ret = 0 if a1.isFormat(): ret = 1 elif a2.isFormat(): ret = -1 else: ret = 0 elif a1.device.dependsOn(a2.device): ret = 1 elif a2.device.dependsOn(a1.device): ret = -1 # generally create partitions before other device types elif isinstance(a1.device, PartitionDevice) and \ isinstance(a2.device, PartitionDevice): if a1.device.disk == a2.device.disk: ret = cmp(a1.device.partedPartition.number, a2.device.partedPartition.number) else: ret = cmp(a1.device.name, a2.device.name) elif isinstance(a1.device, LVMLogicalVolumeDevice) and \ isinstance(a2.device, LVMLogicalVolumeDevice) and \ a1.device.vg == a2.device.vg: if a1.device.singlePV and not a2.device.singlePV: ret = -1 elif not a1.device.singlePV and a2.device.singlePV: ret = 1 elif isinstance(a1.device, PartitionDevice) and \ a2.device.partitioned: ret = 1 elif isinstance(a2.device, PartitionDevice) and \ a1.device.partitioned: ret = -1 elif isinstance(a1.device, PartitionDevice) and \ not isinstance(a2.device, PartitionDevice): ret = -1 elif isinstance(a2.device, PartitionDevice) and \ not isinstance(a1.device, PartitionDevice): ret = 1 else: ret = 0 elif a1.isCreate(): ret = -1 elif a2.isCreate(): ret = 1 elif a1.isMigrate() and a2.isMigrate(): if a1.device.path == a2.device.path: ret = 0 elif a1.device.dependsOn(a2.device): ret = 1 elif a2.device.dependsOn(a1.device): ret = -1 elif isinstance(a1.device, PartitionDevice) and \ isinstance(a2.device, PartitionDevice): if a1.device.disk == a2.device.disk: ret = cmp(a1.device.partedPartition.number, a2.device.partedPartition.number) else: ret = cmp(a1.device.name, a2.device.name) else: ret = 0 else: ret = 0 log.debug("cmp: %d -- %s | %s" % (ret, a1, a2)) return ret log.debug("resetting parted disks...") for device in self.devices: if device.partitioned: device.format.resetPartedDisk() if device.originalFormat.type == "disklabel" and \ device.originalFormat != device.format: device.originalFormat.resetPartedDisk() # Call preCommitFixup on all devices mpoints = [getattr(d.format, 'mountpoint', "") for d in self.devices] for device in self.devices: device.preCommitFixup(mountpoints=mpoints) # Also call preCommitFixup on any devices we're going to # destroy (these are already removed from the tree) for action in self._actions: if isinstance(action, ActionDestroyDevice): action.device.preCommitFixup(mountpoints=mpoints) # setup actions to create any extended partitions we added # # XXX At this point there can be duplicate partition paths in the # tree (eg: non-existent sda6 and previous sda6 that will become # sda5 in the course of partitioning), so we access the list # directly here. for device in self._devices: if isinstance(device, PartitionDevice) and \ device.isExtended and not device.exists: # don't properly register the action since the device is # already in the tree self._actions.append(ActionCreateDevice(device)) for action in self._actions: log.debug("action: %s" % action) log.debug("pruning action queue...") self.pruneActions() for action in self._actions: log.debug("action: %s" % action) log.debug("sorting actions...") self._actions.sort(cmp=cmpActions) for action in self._actions: log.debug("action: %s" % action) # Remove lvm filters for devices we are operating on for device in (d for d in self._devices if d.dependsOn(action.device)): lvm.lvm_cc_removeFilterRejectRegexp(device.name) for action in self._actions: log.info("executing action: %s" % action) if not dryRun: try: action.execute(intf=self.intf) except DiskLabelCommitError: # it's likely that a previous format destroy action # triggered setup of an lvm or md device. self.teardownAll() action.execute(intf=self.intf) udev_settle() for device in self._devices: # make sure we catch any renumbering parted does if device.exists and isinstance(device, PartitionDevice): device.updateName() device.format.device = device.path def _addDevice(self, newdev): """ Add a device to the tree. Raise ValueError if the device's identifier is already in the list. """ if newdev.path in [d.path for d in self._devices] and \ not isinstance(newdev, NoDevice): raise ValueError("device is already in tree") # make sure this device's parent devices are in the tree already for parent in newdev.parents: if parent not in self._devices: raise DeviceTreeError("parent device not in tree") self._devices.append(newdev) log.debug("added %s %s (id %d) to device tree" % (newdev.type, newdev.name, newdev.id)) def _removeDevice(self, dev, force=None, moddisk=True): """ Remove a device from the tree. Only leaves may be removed. """ if dev not in self._devices: raise ValueError("Device '%s' not in tree" % dev.name) if not dev.isleaf and not force: log.debug("%s has %d kids" % (dev.name, dev.kids)) raise ValueError("Cannot remove non-leaf device '%s'" % dev.name) # if this is a partition we need to remove it from the parted.Disk if moddisk and isinstance(dev, PartitionDevice) and \ dev.disk is not None: # if this partition hasn't been allocated it could not have # a disk attribute if dev.partedPartition.type == parted.PARTITION_EXTENDED and \ len(dev.disk.format.logicalPartitions) > 0: raise ValueError("Cannot remove extended partition %s. " "Logical partitions present." % dev.name) dev.disk.format.removePartition(dev.partedPartition) # adjust all other PartitionDevice instances belonging to the # same disk so the device name matches the potentially altered # name of the parted.Partition for device in self._devices: if isinstance(device, PartitionDevice) and \ device.disk == dev.disk: device.updateName() self._devices.remove(dev) log.debug("removed %s %s (id %d) from device tree" % (dev.type, dev.name, dev.id)) for parent in dev.parents: # Will this cause issues with garbage collection? # Do we care about garbage collection? At all? parent.removeChild() def registerAction(self, action): """ Register an action to be performed at a later time. Modifications to the Device instance are handled before we get here. """ if (action.isDestroy() or action.isResize() or \ (action.isCreate() and action.isFormat())) and \ action.device not in self._devices: raise DeviceTreeError("device is not in the tree") elif (action.isCreate() and action.isDevice()): # this allows multiple create actions w/o destroy in between; # we will clean it up before processing actions #raise DeviceTreeError("device is already in the tree") if action.device in self._devices: self._removeDevice(action.device) for d in self._devices: if d.path == action.device.path: self._removeDevice(d) if action.isCreate() and action.isDevice(): self._addDevice(action.device) elif action.isDestroy() and action.isDevice(): self._removeDevice(action.device) elif action.isCreate() and action.isFormat(): if isinstance(action.device.format, formats.fs.FS) and \ action.device.format.mountpoint in self.filesystems: raise DeviceTreeError("mountpoint already in use") log.debug("registered action: %s" % action) self._actions.append(action) def cancelAction(self, action): """ Cancel a registered action. This will unregister the action and do any required modifications to the device list. Actions all operate on a Device, so we can use the devices to determine dependencies. """ if action.isCreate() and action.isDevice(): # remove the device from the tree self._removeDevice(action.device) elif action.isDestroy() and action.isDevice(): # add the device back into the tree self._addDevice(action.device) elif action.isFormat() and \ (action.isCreate() or action.isMigrate() or action.isResize()): action.cancel() self._actions.remove(action) def findActions(self, device=None, type=None, object=None, path=None, devid=None): """ Find all actions that match all specified parameters. Keyword arguments: device -- device to match (Device, or None to match any) type -- action type to match (string, or None to match any) object -- operand type to match (string, or None to match any) path -- device path to match (string, or None to match any) """ if device is None and type is None and object is None and \ path is None and devid is None: return self._actions[:] # convert the string arguments to the types used in actions _type = action_type_from_string(type) _object = action_object_from_string(object) actions = [] for action in self._actions: if device is not None and action.device != device: continue if _type is not None and action.type != _type: continue if _object is not None and action.obj != _object: continue if path is not None and action.device.path != path: continue if devid is not None and action.device.id != devid: continue actions.append(action) return actions def getDependentDevices(self, dep): """ Return a list of devices that depend on dep. The list includes both direct and indirect dependents. """ dependents = [] # special handling for extended partitions since the logical # partitions and their deps effectively depend on the extended logicals = [] if isinstance(dep, PartitionDevice) and dep.partType and \ dep.isExtended: # collect all of the logicals on the same disk for part in self.getDevicesByInstance(PartitionDevice): if part.partType and part.isLogical and part.disk == dep.disk: logicals.append(part) for device in self.devices: if device.dependsOn(dep): dependents.append(device) else: for logical in logicals: if device.dependsOn(logical): dependents.append(device) break return dependents def isIgnored(self, info): """ Return True if info is a device we should ignore. Arguments: info -- a dict representing a udev db entry TODO: - filtering of SAN/FC devices - filtering by driver? """ sysfs_path = udev_device_get_sysfs_path(info) name = udev_device_get_name(info) if not sysfs_path: return None if name in self._ignoredDisks: log.debug("device '%s' in ignoredDisks" % name) return True # Special handling for mdraid external metadata sets (mdraid BIOSRAID): if udev_device_is_md(info) and \ udev_device_get_md_level(info) == "container": if not self.exclusiveDisks and not self._ignoredDisks: # both exclusiveDisks and _ignoredDisks being empty means use # everything return False # we should ignore the container if any of its members are ignored # Members of a fwraid array should have only one name since they # are not virtual devices. members = os.listdir("/sys%s/slaves" % sysfs_path) if not members: return True for member in members: if member in self._ignoredDisks: return True if self.exclusiveDisks and member not in self.exclusiveDisks: return True return False # We want exclusiveDisks to operate on anything that could be # considered a directly usable disk, ie: fwraid array, mpath, or disk. # # Unfortunately, since so many things are represented as disks by # udev/sysfs, we have to define what is a disk in terms of what is # not a disk. if udev_device_is_disk(info) and \ not udev_device_is_dm_partition(info) and \ not udev_device_is_dm_lvm(info) and \ not udev_device_is_dm_crypt(info) and \ not (udev_device_is_md(info) and not udev_device_get_md_container(info)): if self.exclusiveDisks and name not in self.exclusiveDisks: log.debug("device '%s' not in exclusiveDisks" % name) self.addIgnoredDisk(name) return True # Ignore loop and ram devices, we normally already skip these in # udev.py: enumerate_block_devices(), but we can still end up trying # to add them to the tree when they are slaves of other devices, this # happens for example with the livecd if name.startswith("loop") or name.startswith("ram"): return True # Ignore any readonly disks if (udev_device_is_disk(info) and not (udev_device_is_cdrom(info) or udev_device_is_partition(info) or udev_device_is_dm_partition(info) or udev_device_is_dm_lvm(info) or udev_device_is_dm_crypt(info) or (udev_device_is_md(info) and not udev_device_get_md_container(info)))): if iutil.get_sysfs_attr(info["sysfs_path"], 'ro') == '1': log.debug("Ignoring read only device %s" % name) self.addIgnoredDisk(name) return True # FIXME: check for virtual devices whose slaves are on the ignore list def addUdevDMDevice(self, info): name = udev_device_get_name(info) log_method_call(self, name=name) uuid = udev_device_get_uuid(info) sysfs_path = udev_device_get_sysfs_path(info) device = None for dmdev in self.devices: if not isinstance(dmdev, DMDevice): continue try: # there is a device in the tree already with the same # major/minor as this one but with a different name # XXX this is kind of racy if dmdev.getDMNode() == os.path.basename(sysfs_path): # XXX should we take the name already in use? device = dmdev break except DMError: # This is a little lame, but the VG device is a DMDevice # and it won't have a dm node. At any rate, this is not # important enough to crash the install. log.debug("failed to find dm node for %s" % dmdev.name) continue if device is None: # we couldn't find it, so create it # first, get a list of the slave devs and look them up slaves = [] dir = os.path.normpath("/sys/%s/slaves" % sysfs_path) slave_names = os.listdir(dir) for slave_name in slave_names: # if it's a dm-X name, resolve it to a map name first if slave_name.startswith("dm-"): dev_name = dm.name_from_dm_node(slave_name) else: dev_name = slave_name slave_dev = self.getDeviceByName(dev_name) if slave_dev: slaves.append(slave_dev) else: # we haven't scanned the slave yet, so do it now path = os.path.normpath("%s/%s" % (dir, slave_name)) new_info = udev_get_block_device(os.path.realpath(path)[4:]) if new_info: self.addUdevDevice(new_info) if self.getDeviceByName(dev_name) is None: # if the current slave is still not in # the tree, something has gone wrong log.error("failure scanning device %s: could not add slave %s" % (name, dev_name)) return # try to get the device again now that we've got all the slaves device = self.getDeviceByName(name) if device is None and udev_device_is_dm_partition(info): diskname = udev_device_get_dm_partition_disk(info) disk = self.getDeviceByName(diskname) return self.addUdevPartitionDevice(info, disk=disk) # if we get here, we found all of the slave devices and # something must be wrong -- if all of the slaves are in # the tree, this device should be as well if device is None: log.warning("ignoring dm device %s" % name) return device def addUdevMDDevice(self, info): name = udev_device_get_name(info) log_method_call(self, name=name) uuid = udev_device_get_uuid(info) sysfs_path = udev_device_get_sysfs_path(info) device = None slaves = [] dir = os.path.normpath("/sys/%s/slaves" % sysfs_path) slave_names = os.listdir(dir) for slave_name in slave_names: # if it's a dm-X name, resolve it to a map name if slave_name.startswith("dm-"): dev_name = dm.name_from_dm_node(slave_name) else: dev_name = slave_name slave_dev = self.getDeviceByName(dev_name) if slave_dev: slaves.append(slave_dev) else: # we haven't scanned the slave yet, so do it now path = os.path.normpath("%s/%s" % (dir, slave_name)) new_info = udev_get_block_device(os.path.realpath(path)[4:]) if new_info: self.addUdevDevice(new_info) if self.getDeviceByName(dev_name) is None: # if the current slave is still not in # the tree, something has gone wrong log.error("failure scanning device %s: could not add slave %s" % (name, dev_name)) return # try to get the device again now that we've got all the slaves device = self.getDeviceByName(name) if device is None: device = self.getDeviceByUuid(info.get("MD_UUID")) if device: raise DeviceTreeError("MD RAID device %s already in " "devicetree as %s" % (name, device.name)) # if we get here, we found all of the slave devices and # something must be wrong -- if all of the slaves we in # the tree, this device should be as well if device is None: log.warning("using MD RAID device for %s" % name) try: # level is reported as, eg: "raid1" md_level = udev_device_get_md_level(info) md_devices = int(udev_device_get_md_devices(info)) md_uuid = udev_device_get_md_uuid(info) except (KeyError, IndexError, ValueError) as e: log.warning("invalid data for %s: %s" % (name, e)) return device = MDRaidArrayDevice(name, level=md_level, memberDevices=md_devices, uuid=md_uuid, exists=True, parents=slaves) self._addDevice(device) return device def addUdevPartitionDevice(self, info, disk=None): name = udev_device_get_name(info) log_method_call(self, name=name) uuid = udev_device_get_uuid(info) sysfs_path = udev_device_get_sysfs_path(info) device = None if disk is None: disk_name = os.path.basename(os.path.dirname(sysfs_path)) disk_name = disk_name.replace('!','/') disk = self.getDeviceByName(disk_name) if disk is None: # create a device instance for the disk new_info = udev_get_block_device(os.path.dirname(sysfs_path)) if new_info: self.addUdevDevice(new_info) disk = self.getDeviceByName(disk_name) if disk is None: # if the current device is still not in # the tree, something has gone wrong log.error("failure scanning device %s" % disk_name) lvm.lvm_cc_addFilterRejectRegexp(name) return # Check that the disk has partitions. If it does not, we must have # reinitialized the disklabel. # # Also ignore partitions on devices we do not support partitioning # of, like logical volumes. if not getattr(disk.format, "partitions", None) or \ not disk.partitionable: # When we got here because the disk does not have a disklabel # format (ie a biosraid member), or because it is not # partitionable we want LVM to ignore this partition too if disk.format.type != "disklabel" or not disk.partitionable: lvm.lvm_cc_addFilterRejectRegexp(name) log.debug("ignoring partition %s" % name) return try: device = PartitionDevice(name, sysfsPath=sysfs_path, major=udev_device_get_major(info), minor=udev_device_get_minor(info), exists=True, parents=[disk]) except DeviceError: # corner case sometime the kernel accepts a partition table # which gets rejected by parted, in this case we will # prompt to re-initialize the disk, so simply skip the # faulty partitions. return self._addDevice(device) return device def addUdevDiskDevice(self, info): name = udev_device_get_name(info) log_method_call(self, name=name) uuid = udev_device_get_uuid(info) sysfs_path = udev_device_get_sysfs_path(info) serial = udev_device_get_serial(info) bus = udev_device_get_bus(info) # udev doesn't always provide a vendor. vendor = udev_device_get_vendor(info) if not vendor: vendor = "" device = None kwargs = { "serial": serial, "vendor": vendor, "bus": bus } if udev_device_is_iscsi(info): diskType = iScsiDiskDevice initiator = udev_device_get_iscsi_initiator(info) target = udev_device_get_iscsi_name(info) address = udev_device_get_iscsi_address(info) port = udev_device_get_iscsi_port(info) nic = udev_device_get_iscsi_nic(info) kwargs["initiator"] = initiator if initiator == self.iscsi.initiator: node = self.iscsi.getNode(target, address, port, nic) kwargs["node"] = node kwargs["ibft"] = node in self.iscsi.ibftNodes kwargs["nic"] = self.iscsi.ifaces.get(node.iface, node.iface) log.debug("%s is an iscsi disk" % name) else: # qla4xxx partial offload kwargs["node"] = None kwargs["ibft"] = False kwargs["nic"] = "offload:not_accessible_via_iscsiadm" kwargs["fw_address"] = address kwargs["fw_port"] = port kwargs["fw_name"] = name elif udev_device_is_fcoe(info): diskType = FcoeDiskDevice kwargs["nic"] = udev_device_get_fcoe_nic(info) kwargs["identifier"] = udev_device_get_fcoe_identifier(info) log.debug("%s is an fcoe disk" % name) elif udev_device_get_md_container(info): diskType = MDRaidArrayDevice parentName = devicePathToName(udev_device_get_md_container(info)) container = self.getDeviceByName(parentName) if not container: container_sysfs = "/class/block/" + parentName container_info = udev_get_block_device(container_sysfs) if not container_info: log.error("failed to find md container %s at %s" % (parentName, container_sysfs)) return self.addUdevDevice(container_info) container = self.getDeviceByName(parentName) if not container: log.error("failed to scan md container %s" % parentName) return kwargs["parents"] = [container] kwargs["level"] = udev_device_get_md_level(info) kwargs["memberDevices"] = int(udev_device_get_md_devices(info)) kwargs["uuid"] = udev_device_get_md_uuid(info) kwargs["exists"] = True del kwargs["serial"] del kwargs["vendor"] del kwargs["bus"] elif udev_device_is_dasd(info): diskType = DASDDevice kwargs["dasd"] = self.dasd kwargs["busid"] = udev_device_get_dasd_bus_id(info) kwargs["opts"] = {} for attr in ['readonly', 'use_diag', 'erplog', 'failfast']: kwargs["opts"][attr] = udev_device_get_dasd_flag(info, attr) log.debug("%s is a dasd device" % name) elif udev_device_is_zfcp(info): diskType = ZFCPDiskDevice for attr in ['hba_id', 'wwpn', 'fcp_lun']: kwargs[attr] = udev_device_get_zfcp_attribute(info, attr=attr) log.debug("%s is a zfcp device" % name) else: diskType = DiskDevice log.debug("%s is a disk" % name) device = diskType(name, major=udev_device_get_major(info), minor=udev_device_get_minor(info), sysfsPath=sysfs_path, **kwargs) self._addDevice(device) return device def addUdevOpticalDevice(self, info): log_method_call(self) # XXX should this be RemovableDevice instead? # # Looks like if it has ID_INSTANCE=0:1 we can ignore it. device = OpticalDevice(udev_device_get_name(info), major=udev_device_get_major(info), minor=udev_device_get_minor(info), sysfsPath=udev_device_get_sysfs_path(info), vendor=udev_device_get_vendor(info), model=udev_device_get_model(info)) self._addDevice(device) return device def addUdevDevice(self, info): name = udev_device_get_name(info) log_method_call(self, name=name, info=info) uuid = udev_device_get_uuid(info) sysfs_path = udev_device_get_sysfs_path(info) if self.isIgnored(info): log.debug("ignoring %s (%s)" % (name, sysfs_path)) if name not in self._ignoredDisks: self.addIgnoredDisk(name) if udev_device_is_multipath_member(info): # last time we are seeing this mpath member is now, so make sure # LVM ignores its partitions too else a duplicate VG name could # harm us later during partition creation: if udev_device_is_dm(info): path = "/dev/mapper/%s" % name else: path = "/dev/%s" % name log.debug("adding partitions on %s to the lvm ignore list" % path) partitions_paths = [] try: partitions_paths = [p.path for p in parted.Disk(device=parted.Device(path=path)).partitions] except (_ped.IOException, _ped.DeviceException, _ped.DiskLabelException) as e: log.error("Parted error scanning partitions on %s:" % path) log.error(str(e)) # slice off the "/dev/" part, lvm filter cares only about the rest partitions_paths = [p[5:] for p in partitions_paths] map(lvm.lvm_cc_addFilterRejectRegexp, partitions_paths) return log.debug("scanning %s (%s)..." % (name, sysfs_path)) device = self.getDeviceByName(name) # # The first step is to either look up or create the device # if udev_device_is_multipath_member(info) and device is None: device = self.addUdevDiskDevice(info) elif udev_device_is_dm(info) and udev_device_is_dm_mpath(info) and device is None: log.debug("%s is a multipath device" % name) device = self.addUdevDMDevice(info) elif udev_device_is_dm(info): log.debug("%s is a device-mapper device" % name) # try to look up the device if device is None and uuid: # try to find the device by uuid device = self.getDeviceByUuid(uuid) if device is None: device = self.addUdevDMDevice(info) elif udev_device_is_md(info): log.debug("%s is an md device" % name) if device is None and uuid: # try to find the device by uuid device = self.getDeviceByUuid(info.get("MD_UUID")) if device is None: device = self.addUdevMDDevice(info) elif udev_device_is_cdrom(info): log.debug("%s is a cdrom" % name) if device is None: device = self.addUdevOpticalDevice(info) elif udev_device_is_biosraid(info) and udev_device_is_disk(info): log.debug("%s is part of a biosraid" % name) if device is None: device = DiskDevice(name, major=udev_device_get_major(info), minor=udev_device_get_minor(info), sysfsPath=sysfs_path, exists=True) self._addDevice(device) elif udev_device_is_disk(info): if device is None: device = self.addUdevDiskDevice(info) elif udev_device_is_partition(info): log.debug("%s is a partition" % name) if device is None: device = self.addUdevPartitionDevice(info) else: log.error("Unknown block device type for: %s" % name) return # If this device is protected, mark it as such now. Once the tree # has been populated, devices' protected attribute is how we will # identify protected devices. if device and device.name in self.protectedDevNames: device.protected = True # Don't try to do format handling on drives without media or # if we didn't end up with a device somehow. if not device or not device.mediaPresent: return # now handle the device's formatting self.handleUdevDeviceFormat(info, device) log.debug("got device: %s" % device) if device.format.type: log.debug("got format: %s" % device.format) device.originalFormat = device.format def handleUdevDiskLabelFormat(self, info, device): log_method_call(self, device=device.name) # if there is preexisting formatting on the device use it if getFormat(udev_device_get_format(info)).type is not None: log.debug("device %s does not contain a disklabel" % device.name) return if device.partitioned: # this device is already set up log.debug("disklabel format on %s already set up" % device.name) return try: device.setup() except Exception as e: log.debug("setup of %s failed: %s" % (device.name, e)) log.warning("aborting disklabel handler for %s" % device.name) return # special handling for unsupported partitioned devices if not device.partitionable: try: format = getFormat("disklabel", device=device.path, exists=True) except InvalidDiskLabelError: pass else: if format.partitions: # parted's checks for disklabel presence are less than # rigorous, so we will assume that detected disklabels # with no partitions are spurious device.format = format return if self.zeroMbr: initcb = lambda: True else: description = device.description or device.model try: bypath = os.path.basename(deviceNameToDiskByPath(device.name)) details = "\n\nDevice details:\n%s" % (bypath,) except DeviceNotFoundError: # some devices don't have a /dev/disk/by-path/ #!@#@!@# bypath = device.name details = "" initcb = lambda: self.intf.questionInitializeDisk(bypath, description, device.size, details) labelType = self.platform.bestDiskLabelType(device) try: format = getFormat("disklabel", device=device.path, labelType=labelType, exists=True) except InvalidDiskLabelError: # if we have a cb function use it. else we ignore the device. if initcb is not None and initcb(): format = getFormat("disklabel", device=device.path, labelType=labelType, exists=False) else: self._removeDevice(device) self.addIgnoredDisk(device.name) return if not format.exists: # if we just initialized a disklabel we should schedule # actions for destruction of the previous format and creation # of the new one self.registerAction(ActionDestroyFormat(device)) self.registerAction(ActionCreateFormat(device, format)) # If this is a mac-formatted disk we just initialized, make # sure the partition table partition gets added to the device # tree. if device.format.partedDisk.type == "mac" and \ len(device.format.partitions) == 1: name = device.format.partitions[0].getDeviceNodeName() if not self.getDeviceByName(name): partDevice = PartitionDevice(name, exists=True, parents=[device]) self._addDevice(partDevice) else: device.format = format def handleUdevLUKSFormat(self, info, device): log_method_call(self, name=device.name, type=device.format.type) if not device.format.uuid: log.info("luks device %s has no uuid" % device.path) return # look up or create the mapped device if not self.getDeviceByName(device.format.mapName): passphrase = self.__luksDevs.get(device.format.uuid) if passphrase: device.format.passphrase = passphrase else: (passphrase, isglobal) = getLUKSPassphrase(self.intf, device, self.__passphrase) if isglobal and device.format.status: self.__passphrase = passphrase luks_device = LUKSDevice(device.format.mapName, parents=[device], exists=True) try: luks_device.setup() except (LUKSError, CryptoError, DeviceError) as e: log.info("setup of %s failed: %s" % (device.format.mapName, e)) device.removeChild() else: self._addDevice(luks_device) else: log.warning("luks device %s already in the tree" % device.format.mapName) def handleVgLvs(self, vg_device): ret = False vg_name = vg_device.name if not vg_device.complete: log.warning("Skipping LVs for incomplete VG %s" % vg_name) return False lv_info = devicelibs.lvm.lvs(vg_name) try: lv_names = udev_device_get_lv_names(lv_info) lv_uuids = udev_device_get_lv_uuids(lv_info) lv_sizes = udev_device_get_lv_sizes(lv_info) lv_attr = udev_device_get_lv_attr(lv_info) lv_types = udev_device_get_lv_types(lv_info) except KeyError as e: log.warning("invalid data for VG %s: %s" % (vg_name, e)) return if not lv_names: log.debug("no LVs listed for VG %s" % vg_name) return False def addRequiredLV(name, msg): """ Add a prerequisite/parent LV. The parent is strictly required in order to be able to add some other LV that depends on it. For this reason, failure to add the specified LV results in a DeviceTreeError with the message string specified in the msg parameter. :param str name: the full name of the LV (including vgname) :param str msg: message to pass DeviceTreeError ctor on error :returns: None :raises: :class:`~.errors.DeviceTreeError` on failure """ vol = self.getDeviceByName(name) if vol is None: addLV(lv_info[name]) vol = self.getDeviceByName(name) if vol is None: log.error("%s: %s", msg, name) raise DeviceTreeError(msg) def addLV(lv_name, lv_uuid, lv_size, lv_attr, lv_type): """ Instantiate and add an LV based on data from the VG. """ lv_class = LVMLogicalVolumeDevice lv_parents = [vg_device] lv_kwargs = {} name = "%s-%s" % (vg_name, lv_name) if self.getDeviceByName(name): # some lvs may have been added on demand below log.debug("already added %s", name) return if lv_attr[0] in 'Ss': log.info("found lvm snapshot volume '%s'", name) origin_name = devicelibs.lvm.lvorigin(vg_name, lv_name) if not origin_name: log.error("lvm snapshot '%s-%s' has unknown origin", vg_name, lv_name) return if origin_name.endswith("_vorigin]"): log.info("snapshot volume '%s' has vorigin" % name) lv_kwargs["vorigin"] = True vg_device.voriginSnapshots[lv_name] = lv_size return else: origin_device_name = "%s-%s" % (vg_name, origin_name) addRequiredLV(origin_device_name, "failed to locate origin lv") origin = self.getDeviceByName(origin_device_name) if not origin: log.warning("snapshot lv '%s' origin lv '%s-%s' " "not found" % (name, vg_name, origin_name)) return if lv_name in origin.snapshots: return log.debug("adding %dMB to %s snapshot total" % (lv_size, origin.name)) origin.snapshotSpace += lv_size origin.snapshots.append(lv_name) return elif lv_attr[0] == 'v': # skip vorigins return elif lv_attr[0] in 'Ii': # mirror image rname = re.sub(r'_[rm]image.+', '', lv_name[1:-1]) name = "%s-%s" % (vg_name, rname) addRequiredLV(name, "failed to look up raid lv") raid[name]["copies"] += 1 return elif lv_attr[0] == 'e': if lv_name.endswith("_pmspare]"): # spare metadata area for any thin pool that needs repair return # raid metadata volume lv_name = re.sub(r'_[tr]meta.*', '', lv_name[1:-1]) name = "%s-%s" % (vg_name, lv_name) addRequiredLV(name, "failed to look up raid lv") raid[name]["meta"] += lv_size return elif lv_attr[0] == 'l': # log volume rname = re.sub(r'_mlog.*', '', lv_name[1:-1]) name = "%s-%s" % (vg_name, rname) addRequiredLV(name, "failed to look up log lv") raid[name]["log"] = lv_size return elif lv_attr[0] == 't': # thin pool lv_class = LVMThinPoolDevice elif lv_attr[0] == 'V': # thin volume pool_name = devicelibs.lvm.thinlvpoolname(vg_name, lv_name) pool_device_name = "%s-%s" % (vg_name, pool_name) addRequiredLV(pool_device_name, "failed to look up thin pool") lv_class = LVMThinLogicalVolumeDevice lv_parents = [self.getDeviceByName(pool_device_name)] elif lv_name.endswith(']'): # Internal LVM2 device return elif lv_attr[0] not in '-mMrRoO': # Ignore anything else except for the following: # - normal lv # m mirrored # M mirrored without initial sync # r raid # R raid without initial sync # o origin # O origin with merging snapshot return added = False lv_dev = self.getDeviceByUuid(lv_uuid) if lv_dev is None: lv_device = lv_class(lv_name, lv_parents, uuid=lv_uuid, size=lv_size,segType=lv_type, exists=True, **lv_kwargs) self._addDevice(lv_device) try: lv_device.setup() added = True except DeviceError as (msg, name): log.info("setup of %s failed: %s" % (lv_device.name, msg)) if lv_device.status: lv_device.updateSysfsPath() lv_info = udev_get_block_device(lv_device.sysfsPath) if not lv_info: log.error("failed to get udev data for lv %s", lv_device.name) return # do format handling now self.addUdevDevice(lv_info) return added raid = dict(("%s-%s" % (vg_name, n.replace("[", "").replace("]", "")), {"copies": 0, "log": 0, "meta": 0}) for n in lv_names) for lv in zip(lv_names, lv_uuids, lv_sizes, lv_attr, lv_types): ret = addLV(*lv) or ret for name, data in raid.items(): lv_dev = self.getDeviceByName(name) if not lv_dev: # hidden lv, eg: pool00_tdata continue lv_dev.copies = data["copies"] or 1 lv_dev.metaDataSize = data["meta"] lv_dev.logSize = data["log"] log.debug("set %s copies to %d, metadata size to %s, log size " "to %s, total size %s", lv_dev.name, lv_dev.copies, lv_dev.metaDataSize, lv_dev.logSize, lv_dev.vgSpaceUsed) return ret def handleUdevLVMPVFormat(self, info, device): log_method_call(self, name=device.name, type=device.format.type) # lookup/create the VG and LVs try: vg_name = udev_device_get_vg_name(info) except KeyError: # no vg name means no vg -- we're done with this pv return vg_device = self.getDeviceByName(vg_name) if vg_device: vg_device._addDevice(device) else: try: vg_uuid = udev_device_get_vg_uuid(info) vg_size = udev_device_get_vg_size(info) vg_free = udev_device_get_vg_free(info) pe_size = udev_device_get_vg_extent_size(info) pe_count = udev_device_get_vg_extent_count(info) pe_free = udev_device_get_vg_free_extents(info) pv_count = udev_device_get_vg_pv_count(info) except (KeyError, ValueError) as e: log.warning("invalid data for %s: %s" % (device.name, e)) return vg_device = LVMVolumeGroupDevice(vg_name, device, uuid=vg_uuid, size=vg_size, free=vg_free, peSize=pe_size, peCount=pe_count, peFree=pe_free, pvCount=pv_count, exists=True) self._addDevice(vg_device) def handleUdevMDMemberFormat(self, info, device): log_method_call(self, name=device.name, type=device.format.type) # either look up or create the array device name = udev_device_get_name(info) sysfs_path = udev_device_get_sysfs_path(info) md_array = self.getDeviceByUuid(device.format.mdUuid) if device.format.mdUuid and md_array: md_array._addDevice(device) else: # create the array with just this one member try: # level is reported as, eg: "raid1" md_level = udev_device_get_md_level(info) md_devices = int(udev_device_get_md_devices(info)) md_uuid = udev_device_get_md_uuid(info) except (KeyError, ValueError) as e: log.warning("invalid data for %s: %s" % (name, e)) return # try to name the array based on the preferred minor md_info = devicelibs.mdraid.mdexamine(device.path) md_path = md_info.get("device", "") md_metadata = md_info.get("metadata") md_name = devicePathToName(md_info.get("device", "")) if md_name: try: # md_name can be either md# or md/# if md_name.startswith("md/"): minor = int(md_name[3:]) # strip off leading "md/" md_name = "md%d" % minor # use a regular md# name else: minor = int(md_name[2:]) # strip off leading "md" except (IndexError, ValueError): minor = None md_name = None else: array = self.getDeviceByName(md_name) if array and array.uuid != md_uuid: md_name = None if not md_name: # if we don't have a name yet, find the first unused minor minor = 0 while True: if self.getDeviceByName("md%d" % minor): minor += 1 else: break md_name = "md%d" % minor log.debug("using name %s for md array containing member %s" % (md_name, device.name)) md_array = MDRaidArrayDevice(md_name, level=md_level, minor=minor, memberDevices=md_devices, uuid=md_uuid, metadataVersion=md_metadata, sysfsPath=sysfs_path, exists=True) md_array._addDevice(device) self._addDevice(md_array) def handleMultipathMemberFormat(self, info, device): log_method_call(self, name=device.name, type=device.format.type) name = udev_device_get_multipath_name(info) if self.__multipaths.has_key(name): mp = self.__multipaths[name] mp.addParent(device) else: mp = MultipathDevice(name, info, parents=[device]) self.__multipaths[name] = mp def handleUdevDMRaidMemberFormat(self, info, device): log_method_call(self, name=device.name, type=device.format.type) name = udev_device_get_name(info) sysfs_path = udev_device_get_sysfs_path(info) uuid = udev_device_get_uuid(info) major = udev_device_get_major(info) minor = udev_device_get_minor(info) def _all_ignored(rss): retval = True for rs in rss: if rs.name not in self._ignoredDisks: retval = False break return retval # Have we already created the DMRaidArrayDevice? rss = block.getRaidSetFromRelatedMem(uuid=uuid, name=name, major=major, minor=minor) if len(rss) == 0: # we ignore the device in the hope that all the devices # from this set will be ignored. self.unusedRaidMembers.append(device.name) self.addIgnoredDisk(device.name) return # We ignore the device if all the rss are in self._ignoredDisks if _all_ignored(rss): self.addIgnoredDisk(device.name) return for rs in rss: dm_array = self.getDeviceByName(rs.name) if dm_array is not None: # We add the new device. dm_array._addDevice(device) else: # Activate the Raid set. rs.activate(mknod=True) dm_array = DMRaidArrayDevice(rs.name, raidSet=rs, parents=[device]) self._addDevice(dm_array) # Wait for udev to scan the just created nodes, to avoid a race # with the udev_get_block_device() call below. udev_settle() # Get the DMRaidArrayDevice a DiskLabel format *now*, in case # its partitions get scanned before it does. dm_array.updateSysfsPath() dm_array_info = udev_get_block_device(dm_array.sysfsPath) self.handleUdevDiskLabelFormat(dm_array_info, dm_array) # Use the rs's object on the device. # pyblock can return the memebers of a set and the # device has the attribute to hold it. But ATM we # are not really using it. Commenting this out until # we really need it. #device.format.raidmem = block.getMemFromRaidSet(dm_array, # major=major, minor=minor, uuid=uuid, name=name) def handleUdevDeviceFormat(self, info, device): log_method_call(self, name=getattr(device, "name", None)) name = udev_device_get_name(info) sysfs_path = udev_device_get_sysfs_path(info) uuid = udev_device_get_uuid(info) label = udev_device_get_label(info) format_type = udev_device_get_format(info) serial = udev_device_get_serial(info) # Now, if the device is a disk, see if there is a usable disklabel. # If not, see if the user would like to create one. # XXX ignore disklabels on multipath or biosraid member disks if not udev_device_is_biosraid(info) and \ not udev_device_is_multipath_member(info): self.handleUdevDiskLabelFormat(info, device) if device.partitioned or self.isIgnored(info) or \ (not device.partitionable and device.format.type == "disklabel"): # If the device has a disklabel, or the user chose not to # create one, we are finished with this device. Otherwise # it must have some non-disklabel formatting, in which case # we fall through to handle that. return format = None if (not device) or (not format_type) or device.format.type: # this device has no formatting or it has already been set up # FIXME: this probably needs something special for disklabels log.debug("no type or existing type for %s, bailing" % (name,)) return # set up the common arguments for the format constructor args = [format_type] kwargs = {"uuid": uuid, "label": label, "device": device.path, "serial": serial, "exists": True} # set up type-specific arguments for the format constructor if format_type == "multipath_member": kwargs["multipath_members"] = self.getDevicesBySerial(serial) elif format_type == "crypto_LUKS": # luks/dmcrypt kwargs["name"] = "luks-%s" % uuid elif format_type in formats.mdraid.MDRaidMember._udevTypes: # mdraid try: kwargs["mdUuid"] = udev_device_get_md_uuid(info) except KeyError: log.debug("mdraid member %s has no md uuid" % name) kwargs["biosraid"] = udev_device_is_biosraid(info) elif format_type == "LVM2_member": # lvm try: kwargs["vgName"] = udev_device_get_vg_name(info) except KeyError as e: log.debug("PV %s has no vg_name" % name) try: kwargs["vgUuid"] = udev_device_get_vg_uuid(info) except KeyError: log.debug("PV %s has no vg_uuid" % name) try: kwargs["peStart"] = udev_device_get_pv_pe_start(info) except KeyError: log.debug("PV %s has no pe_start" % name) elif format_type == "vfat": # efi magic if isinstance(device, PartitionDevice) and device.bootable: efi = formats.getFormat("efi") if efi.minSize <= device.size <= efi.maxSize: args[0] = "efi" elif format_type == "hfs": # apple bootstrap magic if isinstance(device, PartitionDevice) and device.bootable: apple = formats.getFormat("appleboot") if apple.minSize <= device.size <= apple.maxSize: args[0] = "appleboot" try: log.debug("type detected on '%s' is '%s'" % (name, format_type,)) device.format = formats.getFormat(*args, **kwargs) except FSError: log.debug("type '%s' on '%s' invalid, assuming no format" % (format_type, name,)) device.format = formats.DeviceFormat() return if shouldClear(device, self.clearPartType, clearPartDisks=self.clearPartDisks): # if this is a device that will be cleared by clearpart, # don't bother with format-specific processing return # # now do any special handling required for the device's format # if device.format.type == "luks": self.handleUdevLUKSFormat(info, device) elif device.format.type == "mdmember": self.handleUdevMDMemberFormat(info, device) elif device.format.type == "dmraidmember": self.handleUdevDMRaidMemberFormat(info, device) elif device.format.type == "lvmpv": self.handleUdevLVMPVFormat(info, device) elif device.format.type == "multipath_member": self.handleMultipathMemberFormat(info, device) def updateDeviceFormat(self, device): log.debug("updating format of device: %s" % device) iutil.notify_kernel("/sys%s" % device.sysfsPath) udev_settle() info = udev_get_device(device.sysfsPath) self.handleUdevDeviceFormat(info, device) if device.format.type: log.debug("got format: %s" % device.format) def _handleInconsistencies(self): def reinitializeVG(vg): # First we remove VG data try: vg.destroy() except DeviceError: # the pvremoves will finish the job. log.debug("There was an error destroying the VG %s." % vg.name) # remove VG device from list. self._removeDevice(vg) for parent in vg.parents: parent.format.destroy() # Give the vg the a default format kwargs = {"device": parent.path, "exists": parent.exists} parent.format = formats.getFormat(*[""], **kwargs) def leafInconsistencies(device): if device.type == "lvmvg": if device.complete: return paths = [] for parent in device.parents: paths.append(parent.path) # if zeroMbr is true don't ask. if (self.zeroMbr or self.intf.questionReinitInconsistentLVM(pv_names=paths, vg_name=device.name)): reinitializeVG(device) else: # The user chose not to reinitialize. # hopefully this will ignore the vg components too. self._removeDevice(device) lvm.lvm_cc_addFilterRejectRegexp(device.name) lvm.blacklistVG(device.name) for parent in device.parents: if parent.type == "partition": parent.immutable = \ _("This partition is part of an inconsistent LVM Volume Group.") else: self._removeDevice(parent, moddisk=False) self.addIgnoredDisk(parent.name) lvm.lvm_cc_addFilterRejectRegexp(parent.name) elif device.type == "lvmlv": # we might have already fixed this. if device not in self._devices or \ device.name in self._ignoredDisks: return if device.complete: return paths = [] for parent in device.vg.parents: paths.append(parent.path) if (self.zeroMbr or self.intf.questionReinitInconsistentLVM(pv_names=paths, lv_name=device.name)): # destroy all lvs. for lv in device.vg.lvs: try: # reinitializeVG should clean up if necessary lv.destroy() except StorageError as e: log.info("error removing lv %s from " "inconsistent/incomplete vg %s" % (lv.lvname, device.vg.name)) device.vg._removeLogVol(lv) self._removeDevice(lv) reinitializeVG(device.vg) else: # ignore all the lvs. for lv in device.vg.lvs: self._removeDevice(lv) lvm.lvm_cc_addFilterRejectRegexp(lv.name) # ignore the vg self._removeDevice(device.vg) lvm.lvm_cc_addFilterRejectRegexp(device.vg.name) lvm.blacklistVG(device.vg.name) # ignore all the pvs for parent in device.vg.parents: if parent.type == "partition": parent.immutable = \ _("This partition is part of an inconsistent LVM Volume Group.") else: self._removeDevice(parent, moddisk=False) self.addIgnoredDisk(parent.name) lvm.lvm_cc_addFilterRejectRegexp(parent.name) # Address the inconsistencies present in the tree leaves. for leaf in self.leaves: leafInconsistencies(leaf) # Check for unused BIOS raid members, unused dmraid members are added # to self.unusedRaidMembers as they are processed, extend this list # with unused mdraid BIOS raid members for c in self.getDevicesByType("mdcontainer"): if c.kids == 0: self.unusedRaidMembers.extend(map(lambda m: m.name, c.devices)) self.intf.unusedRaidMembersWarning(self.unusedRaidMembers) # remove md array devices for which we did not find all members for array in self.getDevicesByType("mdarray"): # Exception: allow degraded RAID1 arrays to be detected if (array.level == 1) and (array.memberDevices-1) == len(array.parents): log.warning("RAID1 array %s is degraded - %d of %d members found." % \ (array.name, len(array.parents), array.memberDevices)) elif array.memberDevices > len(array.parents): self._recursiveRemove(array) def _recursiveRemove(self, device): for d in self.getChildren(device): self._recursiveRemove(d) device.teardown() self._removeDevice(device) def _setupLvs(self): ret = False for device in self.getDevicesByType("lvmvg"): if self.handleVgLvs(device): ret = True return ret def populate(self, progressWindow=None): """ Locate all storage devices. """ log.debug("DeviceTree.populate: ignoredDisks is %s ; exclusiveDisks is %s" % (self._ignoredDisks, self.exclusiveDisks)) # mark the tree as unpopulated so exception handlers can tell the # exception originated while finding storage devices self.populated = False # resolve the protected device specs to device names for spec in self.protectedDevSpecs: name = udev_resolve_devspec(spec) if name: self.protectedDevNames.append(name) # FIXME: the backing dev for the live image can't be used as an # install target. note that this is a little bit of a hack # since we're assuming that /dev/live will exist if os.path.exists("/dev/live") and \ stat.S_ISBLK(os.stat("/dev/live")[stat.ST_MODE]): livetarget = devicePathToName(os.path.realpath("/dev/live")) log.info("%s looks to be the live device; marking as protected" % (livetarget,)) self.protectedDevNames.append(livetarget) devicelibs.mpath.writeMultipathConf(writer=self.__multipathConfigWriter, friendly_names=self.mpathFriendlyNames) devices = udev_get_block_devices() if os.access("/etc/multipath.conf", os.R_OK): (singles, mpaths, partitions) = devicelibs.mpath.identifyMultipaths(devices) devices = singles + reduce(list.__add__, mpaths, []) + partitions # remember all the devices idenitfyMultipaths() gave us at this point old_devices = {} for dev in devices: old_devices[dev['name']] = dev log.info("devices to scan: %s" % [d['name'] for d in devices]) for dev in devices: self.addUdevDevice(dev) if progressWindow: progressWindow.pulse() # Having found all the disks, we can now find all the multipaths built # upon them. whitelist = [] mpaths = self.__multipaths.values() mpaths.sort(key=lambda d: d.name) for mp in mpaths: log.info("adding mpath device %s" % mp.name) mp.setup() mp.updateSysfsPath() mp_info = udev_get_block_device(mp.sysfsPath) if mp_info is None or self.isIgnored(mp_info): mp.teardown() continue whitelist.append(mp.name) for p in mp.parents: whitelist.append(p.name) self.__multipathConfigWriter.addMultipathDevice(mp) self._addDevice(mp) self.addUdevDevice(mp_info) if progressWindow: progressWindow.pulse() for d in self.devices: if not d.name in whitelist: self.__multipathConfigWriter.addBlacklistDevice(d) devicelibs.mpath.writeMultipathConf(writer=self.__multipathConfigWriter, friendly_names=self.mpathFriendlyNames) # Now, loop and scan for devices that have appeared since the two above # blocks or since previous iterations. while True: devices = [] new_devices = udev_get_block_devices() for new_device in new_devices: if not old_devices.has_key(new_device['name']): old_devices[new_device['name']] = new_device devices.append(new_device) if len(devices) == 0: # nothing is changing -- time to setup lvm lvs and scan them # we delay this till all other devices are scanned so that # 1) the lvm filter for ignored disks is completely setup # 2) we have checked all devs for duplicate vg names if self._setupLvs(): continue # nothing is changing -- we are finished building devices break log.info("devices to scan: %s" % [d['name'] for d in devices]) for dev in devices: self.addUdevDevice(dev) if progressWindow: progressWindow.pulse() self.populated = True # After having the complete tree we make sure that the system # inconsistencies are ignored or resolved. self._handleInconsistencies() self.teardownAll() try: os.unlink("/etc/mdadm.conf") except OSError: log.info("failed to unlink /etc/mdadm.conf") def teardownAll(self): """ Run teardown methods on all devices. """ for device in self.leaves: try: device.teardown(recursive=True) except StorageError as e: log.info("teardown of %s failed: %s" % (device.name, e)) def setupAll(self): """ Run setup methods on all devices. """ for device in self.leaves: try: device.setup() except DeviceError as (msg, name): log.debug("setup of %s failed: %s" % (device.name, msg)) def getDeviceBySysfsPath(self, path): if not path: return None found = None for device in self._devices: if device.sysfsPath == path: found = device break return found def getDeviceByUuid(self, uuid): if not uuid: return None found = None for device in self._devices: if device.uuid == uuid: found = device break elif device.format.uuid == uuid: found = device break return found def getDevicesBySerial(self, serial): devices = [] for device in self._devices: if not hasattr(device, "serial"): log.warning("device %s has no serial attr" % device.name) continue if device.serial == serial: devices.append(device) return devices def getDeviceByLabel(self, label): if not label: return None found = None for device in self._devices: _label = getattr(device.format, "label", None) if not _label: continue if _label == label: found = device break return found def getDeviceByName(self, name): log.debug("looking for device '%s'..." % name) if not name: return None found = None for device in self._devices: if device.name == name: found = device break elif (device.type == "lvmlv" or device.type == "lvmvg") and \ device.name == name.replace("--","-"): found = device break log.debug("found %s" % found) return found def getDeviceByPath(self, path): log.debug("looking for device '%s'..." % path) if not path: return None found = None for device in self._devices: if device.path == path: found = device break elif (device.type == "lvmlv" or device.type == "lvmvg") and \ device.path == path.replace("--","-"): found = device break log.debug("found %s" % found) return found def getDevicesByType(self, device_type): # TODO: expand this to catch device format types return [d for d in self._devices if d.type == device_type] def getDevicesByInstance(self, device_class): return [d for d in self._devices if isinstance(d, device_class)] @property def devices(self): """ List of device instances """ devices = [] for device in self._devices: if device.path in [d.path for d in devices] and \ not isinstance(device, NoDevice): raise DeviceTreeError("duplicate paths in device tree") devices.append(device) return devices @property def filesystems(self): """ List of filesystems. """ #""" Dict with mountpoint keys and filesystem values. """ filesystems = [] for dev in self.leaves: if dev.format and getattr(dev.format, 'mountpoint', None): filesystems.append(dev.format) return filesystems @property def uuids(self): """ Dict with uuid keys and Device values. """ uuids = {} for dev in self._devices: try: uuid = dev.uuid except AttributeError: uuid = None if uuid: uuids[uuid] = dev try: uuid = dev.format.uuid except AttributeError: uuid = None if uuid: uuids[uuid] = dev return uuids @property def labels(self): """ Dict with label keys and Device values. FIXME: duplicate labels are a possibility """ labels = {} for dev in self._devices: if dev.format and getattr(dev.format, "label", None): labels[dev.format.label] = dev return labels @property def leaves(self): """ List of all devices upon which no other devices exist. """ leaves = [d for d in self._devices if d.isleaf] return leaves def getChildren(self, device): """ Return a list of a device's children. """ return [c for c in self._devices if device in c.parents] def resolveDevice(self, devspec, blkidTab=None, cryptTab=None): # find device in the tree device = None if devspec.startswith("UUID="): # device-by-uuid uuid = devspec.partition("=")[2] device = self.uuids.get(uuid) if device is None: log.error("failed to resolve device %s" % devspec) elif devspec.startswith("LABEL="): # device-by-label label = devspec.partition("=")[2] device = self.labels.get(label) if device is None: log.error("failed to resolve device %s" % devspec) elif devspec.startswith("/dev/"): if devspec.startswith("/dev/disk/"): devspec = os.path.realpath(devspec) if devspec.startswith("/dev/dm-"): dm_name = devicelibs.dm.name_from_dm_node(devspec[5:]) if dm_name: devspec = "/dev/mapper/" + dm_name # device path device = self.getDeviceByPath(devspec) if device is None: if blkidTab: # try to use the blkid.tab to correlate the device # path with a UUID blkidTabEnt = blkidTab.get(devspec) if blkidTabEnt: log.debug("found blkid.tab entry for '%s'" % devspec) uuid = blkidTabEnt.get("UUID") if uuid: device = self.getDeviceByUuid(uuid) if device: devstr = device.name else: devstr = "None" log.debug("found device '%s' in tree" % devstr) if device and device.format and \ device.format.type == "luks": map_name = device.format.mapName log.debug("luks device; map name is '%s'" % map_name) mapped_dev = self.getDeviceByName(map_name) if mapped_dev: device = mapped_dev if device is None and cryptTab and \ devspec.startswith("/dev/mapper/"): # try to use a dm-crypt mapping name to # obtain the underlying device, possibly # using blkid.tab cryptTabEnt = cryptTab.get(devspec.split("/")[-1]) if cryptTabEnt: luks_dev = cryptTabEnt['device'] try: device = self.getChildren(luks_dev)[0] except IndexError as e: pass elif device is None: # dear lvm: can we please have a few more device nodes # for each logical volume? # three just doesn't seem like enough. name = devspec[5:] # strip off leading "/dev/" (vg_name, slash, lv_name) = name.partition("/") if lv_name and not "/" in lv_name: # looks like we may have one lv = "%s-%s" % (vg_name, lv_name) device = self.getDeviceByName(lv) if device: log.debug("resolved '%s' to '%s' (%s)" % (devspec, device.name, device.type)) else: log.debug("failed to resolve '%s'" % devspec) return device