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Diffstat (limited to 'pyanaconda/storage/udev.py')
| -rw-r--r-- | pyanaconda/storage/udev.py | 737 |
1 files changed, 0 insertions, 737 deletions
diff --git a/pyanaconda/storage/udev.py b/pyanaconda/storage/udev.py deleted file mode 100644 index f8ba09c9b..000000000 --- a/pyanaconda/storage/udev.py +++ /dev/null @@ -1,737 +0,0 @@ -# udev.py -# Python module for querying the udev database for device information. -# -# Copyright (C) 2009, 2013 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 <dlehman@redhat.com> -# Chris Lumens <clumens@redhat.com> -# - -import os -import re - -import util -from errors import * - -import pyudev -global_udev = pyudev.Udev() - -import logging -log = logging.getLogger("storage") - -def udev_enumerate_devices(deviceClass="block"): - devices = global_udev.enumerate_devices(subsystem=deviceClass) - return [path[4:] for path in devices] - -def udev_get_device(sysfs_path): - if not os.path.exists("/sys%s" % sysfs_path): - log.debug("%s does not exist" % sysfs_path) - return None - - # XXX we remove the /sys part when enumerating devices, - # so we have to prepend it when creating the device - dev = global_udev.create_device("/sys" + sysfs_path) - - if dev: - dev["name"] = dev.sysname - dev["sysfs_path"] = sysfs_path - - # now add in the contents of the uevent file since they're handy - dev = udev_parse_uevent_file(dev) - - return dev - -def udev_get_devices(deviceClass="block"): - udev_settle() - entries = [] - for path in udev_enumerate_devices(deviceClass): - entry = udev_get_device(path) - if entry: - entries.append(entry) - return entries - -def udev_parse_uevent_file(dev): - path = os.path.normpath("/sys/%s/uevent" % dev['sysfs_path']) - if not os.access(path, os.R_OK): - return dev - - with open(path) as f: - for line in f.readlines(): - (key, equals, value) = line.strip().partition("=") - if not equals: - continue - - dev[key] = value - - return dev - -def udev_settle(): - # wait maximal 300 seconds for udev to be done running blkid, lvm, - # mdadm etc. This large timeout is needed when running on machines with - # lots of disks, or with slow disks - util.run_program(["udevadm", "settle", "--timeout=300"]) - -def udev_trigger(subsystem=None, action="add", name=None): - argv = ["trigger", "--action=%s" % action] - if subsystem: - argv.append("--subsystem-match=%s" % subsystem) - if name: - argv.append("--sysname-match=%s" % name) - - util.run_program(["udevadm"] + argv) - udev_settle() - -def udev_resolve_devspec(devspec): - if not devspec: - return None - - import devices as _devices - ret = None - for dev in udev_get_block_devices(): - if devspec.startswith("LABEL="): - if udev_device_get_label(dev) == devspec[6:]: - ret = dev - break - elif devspec.startswith("UUID="): - if udev_device_get_uuid(dev) == devspec[5:]: - ret = dev - break - elif udev_device_get_name(dev) == _devices.devicePathToName(devspec): - ret = dev - break - else: - spec = devspec - if not spec.startswith("/dev/"): - spec = os.path.normpath("/dev/" + spec) - - for link in dev["symlinks"]: - if spec == link: - ret = dev - break - - del _devices - if ret: - return udev_device_get_name(ret) - -def udev_resolve_glob(glob): - import fnmatch - ret = [] - - if not glob: - return ret - - for dev in udev_get_block_devices(): - name = udev_device_get_name(dev) - - if fnmatch.fnmatch(name, glob): - ret.append(name) - else: - for link in dev["symlinks"]: - if fnmatch.fnmatch(link, glob): - ret.append(name) - - return ret - -def udev_get_block_devices(): - udev_settle() - entries = [] - for path in udev_enumerate_block_devices(): - entry = udev_get_block_device(path) - if entry: - if entry["name"].startswith("md"): - # mdraid is really braindead, when a device is stopped - # it is no longer usefull in anyway (and we should not - # probe it) yet it still sticks around, see bug rh523387 - state = None - state_file = "/sys/%s/md/array_state" % entry["sysfs_path"] - if os.access(state_file, os.R_OK): - state = open(state_file).read().strip() - if state == "clear": - continue - entries.append(entry) - return entries - -def __is_blacklisted_blockdev(dev_name): - """Is this a blockdev we never want for an install?""" - if dev_name.startswith("ram") or dev_name.startswith("fd"): - return True - - if os.path.exists("/sys/class/block/%s/device/model" %(dev_name,)): - model = open("/sys/class/block/%s/device/model" %(dev_name,)).read() - for bad in ("IBM *STMF KERNEL", "SCEI Flash-5", "DGC LUNZ"): - if model.find(bad) != -1: - log.info("ignoring %s with model %s" %(dev_name, model)) - return True - - return False - -def udev_enumerate_block_devices(): - import os.path - - return filter(lambda d: not __is_blacklisted_blockdev(os.path.basename(d)), - udev_enumerate_devices(deviceClass="block")) - -def udev_get_block_device(sysfs_path): - dev = udev_get_device(sysfs_path) - if not dev or not dev.has_key("name"): - return None - else: - return dev - - -# These are functions for retrieving specific pieces of information from -# udev database entries. -def udev_device_get_name(udev_info): - """ Return the best name for a device based on the udev db data. """ - if "DM_NAME" in udev_info: - name = udev_info["DM_NAME"] - else: - name = udev_info["name"] - - return name - -def udev_device_get_format(udev_info): - """ Return a device's format type as reported by udev. """ - return udev_info.get("ID_FS_TYPE") - -def udev_device_get_uuid(udev_info): - """ Get the UUID from the device's format as reported by udev. """ - md_uuid = udev_info.get("MD_UUID", '') - uuid = udev_info.get("ID_FS_UUID", '') - # we don't want to return the array's uuid as a member's uuid - if len(uuid) > 0 and \ - re.sub(r'\W', '', md_uuid) != re.sub(r'\W', '', uuid): - return udev_info.get("ID_FS_UUID") - -def udev_device_get_label(udev_info): - """ Get the label from the device's format as reported by udev. """ - return udev_info.get("ID_FS_LABEL") - -def udev_device_is_dm(info): - """ Return True if the device is a device-mapper device. """ - return info.has_key("DM_NAME") - -def udev_device_is_md(info): - """ Return True if the device is a mdraid array device. """ - # Don't identify partitions on mdraid arrays as raid arrays - if udev_device_is_partition(info): - return False - - # The udev information keeps shifting around. Only md arrays have a - # /sys/class/block/<name>/md/ subdirectory. - md_dir = "/sys" + udev_device_get_sysfs_path(info) + "/md" - return os.path.exists(md_dir) - -def udev_device_is_cciss(info): - """ Return True if the device is a CCISS device. """ - return udev_device_get_name(info).startswith("cciss") - -def udev_device_is_dasd(info): - """ Return True if the device is a dasd device. """ - devname = info.get("DEVNAME") - if devname: - return devname.startswith("dasd") - else: - return False - -def udev_device_is_zfcp(info): - """ Return True if the device is a zfcp device. """ - if info.get("DEVTYPE") != "disk": - return False - - subsystem = "/sys" + info.get("sysfs_path") - - while True: - topdir = os.path.realpath(os.path.dirname(subsystem)) - driver = "%s/driver" % (topdir,) - - if os.path.islink(driver): - subsystemname = os.path.basename(os.readlink(subsystem)) - drivername = os.path.basename(os.readlink(driver)) - - if subsystemname == 'ccw' and drivername == 'zfcp': - return True - - newsubsystem = os.path.dirname(topdir) - - if newsubsystem == topdir: - break - - subsystem = newsubsystem + "/subsystem" - - return False - -def udev_device_get_zfcp_attribute(info, attr=None): - """ Return the value of the specified attribute of the zfcp device. """ - if not attr: - log.debug("udev_device_get_zfcp_attribute() called with attr=None") - return None - - attribute = "/sys%s/device/%s" % (info.get("sysfs_path"), attr,) - attribute = os.path.realpath(attribute) - - if not os.path.isfile(attribute): - log.warning("%s is not a valid zfcp attribute" % (attribute,)) - return None - - return open(attribute, "r").read().strip() - -def udev_device_get_dasd_bus_id(info): - """ Return the CCW bus ID of the dasd device. """ - return info.get("sysfs_path").split("/")[-3] - -def udev_device_get_dasd_flag(info, flag=None): - """ Return the specified flag for the dasd device. """ - if flag is None: - return None - - path = "/sys" + info.get("sysfs_path") + "/device/" + flag - if not os.path.isfile(path): - return None - - return open(path, 'r').read().strip() - -def udev_device_is_cdrom(info): - """ Return True if the device is an optical drive. """ - # FIXME: how can we differentiate USB drives from CD-ROM drives? - # -- USB drives also generate a sdX device. - return info.get("ID_CDROM") == "1" - -def udev_device_is_disk(info): - """ Return True is the device is a disk. """ - if udev_device_is_cdrom(info): - return False - has_range = os.path.exists("/sys/%s/range" % info['sysfs_path']) - return info.get("DEVTYPE") == "disk" or has_range - -def udev_device_is_partition(info): - has_start = os.path.exists("/sys/%s/start" % info['sysfs_path']) - return info.get("DEVTYPE") == "partition" or has_start - -def udev_device_is_loop(info): - """ Return True if the device is a configured loop device. """ - return (udev_device_get_name(info).startswith("loop") and - os.path.isdir("/sys/%s/loop" % info['sysfs_path'])) - -def udev_device_get_serial(udev_info): - """ Get the serial number/UUID from the device as reported by udev. """ - return udev_info.get("ID_SERIAL_RAW", udev_info.get("ID_SERIAL_SHORT", udev_info.get("ID_SERIAL"))) - -def udev_device_get_wwid(udev_info): - """ The WWID of a device is typically just its serial number, but with - colons in the name to make it more readable. """ - serial = udev_device_get_serial(udev_info) - return util.insert_colons(serial) if serial else "" - -def udev_device_get_vendor(udev_info): - """ Get the vendor of the device as reported by udev. """ - return udev_info.get("ID_VENDOR_FROM_DATABASE", udev_info.get("ID_VENDOR")) - -def udev_device_get_model(udev_info): - """ Get the model of the device as reported by udev. """ - return udev_info.get("ID_MODEL_FROM_DATABASE", udev_info.get("ID_MODEL")) - -def udev_device_get_bus(udev_info): - """ Get the bus a device is connected to the system by. """ - return udev_info.get("ID_BUS", "").upper() - -def udev_device_get_path(info): - return info["ID_PATH"] - -def udev_device_get_by_path(info): - if info.has_key('symlinks'): - for link in info['symlinks']: - if link.startswith('/dev/disk/by-path/'): - return link - - return udev_device_get_name(info) - -def udev_device_get_sysfs_path(info): - return info['sysfs_path'] - -def udev_device_get_major(info): - return int(info["MAJOR"]) - -def udev_device_get_minor(info): - return int(info["MINOR"]) - -def udev_device_get_md_level(info): - return info.get("MD_LEVEL") - -def udev_device_get_md_devices(info): - return int(info["MD_DEVICES"]) - -def udev_device_get_md_uuid(info): - return info["MD_UUID"] - -def udev_device_get_md_container(info): - return info.get("MD_CONTAINER") - -def udev_device_get_md_name(info): - return info.get("MD_DEVNAME") - -def udev_device_get_vg_name(info): - return info['LVM2_VG_NAME'] - -def udev_device_get_lv_vg_name(info): - return info['DM_VG_NAME'] - -def udev_device_get_vg_uuid(info): - return info['LVM2_VG_UUID'] - -def udev_device_get_vg_size(info): - # lvm's decmial precision is not configurable, so we tell it to use - # KB and convert to MB here - return float(info['LVM2_VG_SIZE']) / 1024 - -def udev_device_get_vg_free(info): - # lvm's decmial precision is not configurable, so we tell it to use - # KB and convert to MB here - return float(info['LVM2_VG_FREE']) / 1024 - -def udev_device_get_vg_extent_size(info): - # lvm's decmial precision is not configurable, so we tell it to use - # KB and convert to MB here - return float(info['LVM2_VG_EXTENT_SIZE']) / 1024 - -def udev_device_get_vg_extent_count(info): - return int(info['LVM2_VG_EXTENT_COUNT']) - -def udev_device_get_vg_free_extents(info): - return int(info['LVM2_VG_FREE_COUNT']) - -def udev_device_get_vg_pv_count(info): - return int(info['LVM2_PV_COUNT']) - -def udev_device_get_pv_pe_start(info): - # lvm's decmial precision is not configurable, so we tell it to use - # KB and convert to MB here - return float(info['LVM2_PE_START']) / 1024 - -def udev_device_get_lv_names(info): - names = info['LVM2_LV_NAME'] - if not names: - names = [] - elif not isinstance(names, list): - names = [names] - return names - -def udev_device_get_lv_uuids(info): - uuids = info['LVM2_LV_UUID'] - if not uuids: - uuids = [] - elif not isinstance(uuids, list): - uuids = [uuids] - return uuids - -def udev_device_get_lv_sizes(info): - # lvm's decmial precision is not configurable, so we tell it to use - # KB and convert to MB here - sizes = info['LVM2_LV_SIZE'] - if not sizes: - sizes = [] - elif not isinstance(sizes, list): - sizes = [sizes] - - return [float(s) / 1024 for s in sizes] - -def udev_device_get_lv_attr(info): - attr = info['LVM2_LV_ATTR'] - if not attr: - attr = [] - elif not isinstance(attr, list): - attr = [attr] - return attr - -def udev_device_dm_subsystem_match(info, subsystem): - """ Return True if the device matches a given device-mapper subsystem. """ - uuid = info.get("DM_UUID", "") - uuid_fields = uuid.split("-") - _subsystem = uuid_fields[0] - if _subsystem.lower().startswith("part") and len(uuid_fields) > 1: - # kpartx uses partN- as a subsystem prefix, which we ignore because - # we only care about the subsystem of the partitions' parent device. - _subsystem = uuid_fields[1] - - if _subsystem == uuid or not _subsystem: - return False - - return _subsystem.lower() == subsystem.lower() - -def udev_device_is_dm_lvm(info): - """ Return True if the device is an LVM logical volume. """ - return udev_device_dm_subsystem_match(info, "lvm") - -def udev_device_is_dm_crypt(info): - """ Return True if the device is a mapped dm-crypt device. """ - return udev_device_dm_subsystem_match(info, "crypt") - -def udev_device_is_dm_luks(info): - """ Return True if the device is a mapped LUKS device. """ - is_crypt = udev_device_dm_subsystem_match(info, "crypt") - try: - _type = info.get("DM_UUID", "").split("-")[1].lower() - except IndexError: - _type = "" - - return is_crypt and _type.startswith("luks") - -def udev_device_is_dm_raid(info): - """ Return True if the device is a dmraid array device. """ - return udev_device_dm_subsystem_match(info, "dmraid") - -def udev_device_is_dm_mpath(info): - """ Return True if the device is a multipath device. """ - return udev_device_dm_subsystem_match(info, "mpath") - -def udev_device_is_dm_anaconda(info): - """ Return True if the device is an anaconda disk image. """ - return udev_device_dm_subsystem_match(info, "anaconda") - -def udev_device_is_dm_livecd(info): - """ Return True if the device is a livecd OS image. """ - # return udev_device_dm_subsystem_match(info, "livecd") - return (udev_device_is_dm(info) and - udev_device_get_name(info).startswith("live")) - -def udev_device_is_biosraid_member(info): - # Note that this function does *not* identify raid sets. - # Tests to see if device is part of a dmraid set. - # dmraid and mdraid have the same ID_FS_USAGE string, ID_FS_TYPE has a - # string that describes the type of dmraid (isw_raid_member...), I don't - # want to maintain a list and mdraid's ID_FS_TYPE='linux_raid_member', so - # dmraid will be everything that is raid and not linux_raid_member - from formats.dmraid import DMRaidMember - from formats.mdraid import MDRaidMember - if info.has_key("ID_FS_TYPE") and \ - (info["ID_FS_TYPE"] in DMRaidMember._udevTypes or \ - info["ID_FS_TYPE"] in MDRaidMember._udevTypes) and \ - info["ID_FS_TYPE"] != "linux_raid_member": - return True - - return False - -def udev_device_get_dm_partition_disk(info): - return re.sub(r'\d*$', '', udev_device_get_name(info)) - -def udev_device_is_dm_partition(info): - return (udev_device_is_dm(info) and - info.get("DM_UUID", "").split("-")[0].startswith("part")) - -def udev_device_is_multipath_member(info): - """ Return True if the device is part of a multipath. """ - return info.get("ID_FS_TYPE") == "multipath_member" - -def udev_device_get_multipath_name(info): - """ Return the name of the multipath that the device is a member of. """ - if udev_device_is_multipath_member(info): - return info['ID_MPATH_NAME'] - return None - -# iscsi disks' ID_PATH form depends on the driver: -# for software iscsi: -# ip-${iscsi_address}:${iscsi_port}-iscsi-${iscsi_tgtname}-lun-${lun} -# for partial offload iscsi: -# pci-${pci_address}-ip-${iscsi_address}:${iscsi_port}-iscsi-${iscsi_tgtname}-lun-${lun} -# Note that in the case of IPV6 iscsi_address itself can contain : -# too, but iscsi_port never contains : - -def udev_device_is_sw_iscsi(info): - # software iscsi - try: - path_components = udev_device_get_path(info).split("-") - - if info["ID_BUS"] == "scsi" and len(path_components) >= 6 and \ - path_components[0] == "ip" and path_components[2] == "iscsi": - return True - except KeyError: - pass - - return False - -def udev_device_is_partoff_iscsi(info): - # partial offload iscsi - try: - path_components = udev_device_get_path(info).split("-") - - if info["ID_BUS"] == "scsi" and len(path_components) >= 8 and \ - path_components[2] == "ip" and path_components[4] == "iscsi": - return True - except KeyError: - pass - - return False - -def udev_device_is_iscsi(info): - return udev_device_is_sw_iscsi(info) or udev_device_is_partoff_iscsi(info) - -def udev_device_get_iscsi_name(info): - name_field = 3 - if udev_device_is_partoff_iscsi(info): - name_field = 5 - - path_components = udev_device_get_path(info).split("-") - - # Tricky, the name itself contains atleast 1 - char - return "-".join(path_components[name_field:len(path_components)-2]) - -def udev_device_get_iscsi_address(info): - address_field = 1 - if udev_device_is_partoff_iscsi(info): - address_field = 3 - - path_components = udev_device_get_path(info).split("-") - - # IPV6 addresses contain : within the address, so take everything - # before the last : as address - return ":".join(path_components[address_field].split(":")[:-1]) - -def udev_device_get_iscsi_port(info): - address_field = 1 - if udev_device_is_partoff_iscsi(info): - address_field = 3 - - path_components = udev_device_get_path(info).split("-") - - # IPV6 contains : within the address, the part after the last : is the port - return path_components[address_field].split(":")[-1] - -def udev_device_get_iscsi_session(info): - # '/devices/pci0000:00/0000:00:02.0/0000:09:00.0/0000:0a:01.0/0000:0e:00.2/host3/session1/target3:0:0/3:0:0:0/block/sda' - # The position of sessionX part depends on device - # (e.g. offload vs. sw; also varies for different offload devs) - session = None - match = re.match('/.*/(session\d+)', info["sysfs_path"]) - if match: - session = match.groups()[0] - else: - log.error("udev_device_get_iscsi_session: session not found in %s" % info) - return session - - -def udev_device_get_iscsi_nic(info): - iface = None - session = udev_device_get_iscsi_session(info) - if session: - iface = open("/sys/class/iscsi_session/%s/ifacename" % - session).read().strip() - return iface - -def udev_device_get_iscsi_initiator(info): - initiator = None - if udev_device_is_partoff_iscsi(info): - host = re.match('.*/(host\d+)', info["sysfs_path"]).groups()[0] - if host: - initiator_file = "/sys/class/iscsi_host/%s/initiatorname" % host - if os.access(initiator_file, os.R_OK): - initiator = open(initiator_file).read().strip() - log.debug("found offload iscsi initiatorname %s in file %s" % - (initiator, initiator_file)) - if initiator.lstrip("(").rstrip(")").lower() == "null": - initiator = None - if initiator is None: - session = udev_device_get_iscsi_session(info) - if session: - initiator = open("/sys/class/iscsi_session/%s/initiatorname" % - session).read().strip() - log.debug("found iscsi initiatorname %s" % initiator) - return initiator - - -# fcoe disks have ID_PATH in the form of: -# For FCoE directly over the NIC (so no VLAN and thus no DCB): -# pci-eth#-fc-${id} -# For FCoE over a VLAN (the DCB case) -# fc-${id} -# fcoe parts look like this: -# pci-eth#-fc-${id}-part# -# fc-${id}-part# - -# For the FCoE over VLAN case we also do some checks on the sysfs_path as -# the ID_PATH does not contain all info we need there, the sysfs_path for -# an fcoe disk over VLAN looks like this: -# /devices/virtual/net/eth4.802-fcoe/host3/rport-3:0-4/target3:0:1/3:0:1:0/block/sde -# And for a partition: -# /devices/virtual/net/eth4.802-fcoe/host3/rport-3:0-4/target3:0:1/3:0:1:0/block/sde/sde1 - -# This is completely different for Broadcom FCoE devices (bnx2fc), where we use -# the sysfs path: -# /devices/pci0000:00/0000:00:02.0/0000:09:00.0/0000:0a:01.0/0000:0e:00.0/host3/rport-3:0-2/target3:0:1/3:0:1:3/block/sdm -# and find whether the host has 'fc_host' and if it the device has a bound -# Ethernet interface. - -def _detect_broadcom_fcoe(info): - re_pci_host=re.compile('/(.*)/(host\d+)') - match = re_pci_host.match(info["sysfs_path"]) - if match: - sysfs_pci, host = match.groups() - if os.access('/sys/%s/%s/fc_host' %(sysfs_pci, host), os.X_OK) and \ - os.access('/sys/%s/net' %(sysfs_pci), os.X_OK): - return (sysfs_pci, host) - return (None, None) - -def udev_device_is_fcoe(info): - if info.get("ID_BUS") != "scsi": - return False - - path = info.get("ID_PATH", "") - path_components = path.split("-") - - if path.startswith("pci-eth") and len(path_components) >= 4 and \ - path_components[2] == "fc": - return True - - if path.startswith("fc-") and "fcoe" in info["sysfs_path"]: - return True - - if _detect_broadcom_fcoe(info) != (None, None): - return True - - return False - -def udev_device_get_fcoe_nic(info): - path = info.get("ID_PATH", "") - path_components = path.split("-") - - if path.startswith("pci-eth") and len(path_components) >= 4 and \ - path_components[2] == "fc": - return path_components[1] - - if path.startswith("fc-") and "fcoe" in info["sysfs_path"]: - return info["sysfs_path"].split("/")[4].split(".")[0] - - (sysfs_pci, host) = _detect_broadcom_fcoe(info) - if (sysfs_pci, host) != (None, None): - net_path = '/sys/%s/net' % sysfs_pci - listdir = os.listdir(net_path) - if len(listdir) > 0 : - return listdir[0] - -def udev_device_get_fcoe_identifier(info): - path = info.get("ID_PATH", "") - path_components = path.split("-") - - if path.startswith("pci-eth") and len(path_components) >= 4 and \ - path_components[2] == "fc": - return path_components[3] - - if path.startswith("fc-") and "fcoe" in info["sysfs_path"]: - return path_components[1] - - if udev_device_is_fcoe(info) and len(path_components) >= 4 and \ - path_components[2] == 'fc': - return path_components[3] |