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qubes-installer-qubes-os/anaconda/storage/zfcp.py

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#
# zfcp.py - mainframe zfcp configuration install data
#
# Copyright (C) 2001, 2002, 2003, 2004 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty 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, see <http://www.gnu.org/licenses/>.
#
# Author(s): Karsten Hopp <karsten@redhat.com>
#
import string
import os
from constants import *
from udev import udev_settle
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
import logging
log = logging.getLogger("anaconda")
import warnings
def loggedWriteLineToFile(fn, value):
f = open(fn, "w")
log.debug("echo %s > %s" % (value, fn))
f.write("%s\n" % (value))
f.close()
zfcpsysfs = "/sys/bus/ccw/drivers/zfcp"
scsidevsysfs = "/sys/bus/scsi/devices"
class ZFCPDevice:
def __init__(self, devnum, wwpn, fcplun):
self.devnum = self.sanitizeDeviceInput(devnum)
self.wwpn = self.sanitizeWWPNInput(wwpn)
self.fcplun = self.sanitizeFCPLInput(fcplun)
if not self.checkValidDevice(self.devnum):
raise ValueError, _("You have not specified a device number or the number is invalid")
if not self.checkValidWWPN(self.wwpn):
raise ValueError, _("You have not specified a worldwide port name or the name is invalid.")
if not self.checkValidFCPLun(self.fcplun):
raise ValueError, _("You have not specified a FCP LUN or the number is invalid.")
def __str__(self):
return "%s %s %s" %(self.devnum, self.wwpn, self.fcplun)
def sanitizeDeviceInput(self, dev):
if dev is None or dev == "":
return None
dev = dev.lower()
bus = dev[:string.rfind(dev, ".") + 1]
dev = dev[string.rfind(dev, ".") + 1:]
dev = "0" * (4 - len(dev)) + dev
if not len(bus):
return "0.0." + dev
else:
return bus + dev
def sanitizeWWPNInput(self, id):
if id is None or id == "":
return None
id = id.lower()
if id[:2] != "0x":
return "0x" + id
return id
# ZFCP LUNs are usually entered as 16 bit, sysfs accepts only 64 bit
# (#125632), expand with zeroes if necessary
def sanitizeFCPLInput(self, lun):
if lun is None or lun == "":
return None
lun = lun.lower()
if lun[:2] == "0x":
lun = lun[2:]
lun = "0x" + "0" * (4 - len(lun)) + lun
lun = lun + "0" * (16 - len(lun) + 2)
return lun
def _hextest(self, hex):
try:
int(hex, 16)
return True
except TypeError:
return False
def checkValidDevice(self, id):
if id is None or id == "":
return False
if len(id) != 8: # p.e. 0.0.0600
return False
if id[0] not in string.digits or id[2] not in string.digits:
return False
if id[1] != "." or id[3] != ".":
return False
return self._hextest(id[4:])
def checkValid64BitHex(self, hex):
if hex is None or hex == "":
return False
if len(hex) != 18:
return False
return self._hextest(hex)
checkValidWWPN = checkValidFCPLun = checkValid64BitHex
def onlineDevice(self):
online = "%s/%s/online" %(zfcpsysfs, self.devnum)
portadd = "%s/%s/port_add" %(zfcpsysfs, self.devnum)
portdir = "%s/%s/%s" %(zfcpsysfs, self.devnum, self.wwpn)
unitadd = "%s/unit_add" %(portdir)
unitdir = "%s/%s" %(portdir, self.fcplun)
failed = "%s/failed" %(unitdir)
try:
if not os.path.exists(online):
loggedWriteLineToFile("/proc/cio_ignore",
"free %s" %(self.devnum,))
udev_settle()
except IOError as e:
raise ValueError, _("Could not free zFCP device %(devnum)s from "
"device ignore list (%(e)s).") \
% {'devnum': self.devnum, 'e': e}
if not os.path.exists(online):
raise ValueError, _(
"zFCP device %s not found, not even in device ignore list."
%(self.devnum,))
try:
f = open(online, "r")
devonline = f.readline().strip()
f.close()
if devonline != "1":
loggedWriteLineToFile(online, "1")
else:
log.info("zFCP device %s already online." %(self.devnum,))
except IOError as e:
raise ValueError, _("Could not set zFCP device %(devnum)s "
"online (%(e)s).") \
% {'devnum': self.devnum, 'e': e}
if not os.path.exists(portdir):
if os.path.exists(portadd):
# older zfcp sysfs interface
try:
loggedWriteLineToFile(portadd, self.wwpn)
udev_settle()
except IOError as e:
raise ValueError, _("Could not add WWPN %(wwpn)s to zFCP "
"device %(devnum)s (%(e)s).") \
% {'wwpn': self.wwpn,
'devnum': self.devnum,
'e': e}
else:
# newer zfcp sysfs interface with auto port scan
raise ValueError, _("WWPN %(wwpn)s not found at zFCP device "
"%(devnum)s.") % {'wwpn': self.wwpn,
'devnum': self.devnum}
else:
if os.path.exists(portadd):
# older zfcp sysfs interface
log.info("WWPN %(wwpn)s at zFCP device %(devnum)s already "
"there.") % {'wwpn': self.wwpn,
'devnum': self.devnum}
if not os.path.exists(unitdir):
try:
loggedWriteLineToFile(unitadd, self.fcplun)
udev_settle()
except IOError as e:
raise ValueError, _("Could not add LUN %(fcplun)s to WWPN "
"%(wwpn)s on zFCP device %(devnum)s "
"(%(e)s).") \
% {'fcplun': self.fcplun, 'wwpn': self.wwpn,
'devnum': self.devnum, 'e': e}
else:
raise ValueError, _("LUN %(fcplun)s at WWPN %(wwpn)s on zFCP "
"device %(devnum)s already configured.") \
% {'fcplun': self.fcplun,
'wwpn': self.wwpn,
'devnum': self.devnum}
fail = "0"
try:
f = open(failed, "r")
fail = f.readline().strip()
f.close()
except IOError as e:
raise ValueError, _("Could not read failed attribute of LUN "
"%(fcplun)s at WWPN %(wwpn)s on zFCP device "
"%(devnum)s (%(e)s).") \
% {'fcplun': self.fcplun,
'wwpn': self.wwpn,
'devnum': self.devnum,
'e': e}
if fail != "0":
self.offlineDevice()
raise ValueError, _("Failed LUN %(fcplun)s at WWPN %(wwpn)s on "
"zFCP device %(devnum)s removed again.") \
% {'fcplun': self.fcplun,
'wwpn': self.wwpn,
'devnum': self.devnum}
return True
def offlineSCSIDevice(self):
f = open("/proc/scsi/scsi", "r")
lines = f.readlines()
f.close()
# alternatively iterate over /sys/bus/scsi/devices/*:0:*:*/
for line in lines:
if not line.startswith("Host"):
continue
scsihost = string.split(line)
host = scsihost[1]
channel = "0"
id = scsihost[5]
lun = scsihost[7]
scsidev = "%s:%s:%s:%s" % (host[4:], channel, id, lun)
fcpsysfs = "%s/%s" % (scsidevsysfs, scsidev)
scsidel = "%s/%s/delete" % (scsidevsysfs, scsidev)
f = open("%s/hba_id" %(fcpsysfs), "r")
fcphbasysfs = f.readline().strip()
f.close()
f = open("%s/wwpn" %(fcpsysfs), "r")
fcpwwpnsysfs = f.readline().strip()
f.close()
f = open("%s/fcp_lun" %(fcpsysfs), "r")
fcplunsysfs = f.readline().strip()
f.close()
if fcphbasysfs == self.devnum \
and fcpwwpnsysfs == self.wwpn \
and fcplunsysfs == self.fcplun:
loggedWriteLineToFile(scsidel, "1")
udev_settle()
return
log.warn("no scsi device found to delete for zfcp %s %s %s"
%(self.devnum, self.wwpn, self.fcplun))
def offlineDevice(self):
offline = "%s/%s/online" %(zfcpsysfs, self.devnum)
portadd = "%s/%s/port_add" %(zfcpsysfs, self.devnum)
portremove = "%s/%s/port_remove" %(zfcpsysfs, self.devnum)
unitremove = "%s/%s/%s/unit_remove" %(zfcpsysfs, self.devnum, self.wwpn)
portdir = "%s/%s/%s" %(zfcpsysfs, self.devnum, self.wwpn)
devdir = "%s/%s" %(zfcpsysfs, self.devnum)
try:
self.offlineSCSIDevice()
except IOError as e:
raise ValueError, _("Could not correctly delete SCSI device of "
"zFCP %(devnum)s %(wwpn)s %(fcplun)s "
"(%(e)s).") \
% {'devnum': self.devnum, 'wwpn': self.wwpn,
'fcplun': self.fcplun, 'e': e}
try:
loggedWriteLineToFile(unitremove, self.fcplun)
except IOError as e:
raise ValueError, _("Could not remove LUN %(fcplun)s at WWPN "
"%(wwpn)s on zFCP device %(devnum)s "
"(%(e)s).") \
% {'fcplun': self.fcplun, 'wwpn': self.wwpn,
'devnum': self.devnum, 'e': e}
if os.path.exists(portadd):
# only try to remove ports with older zfcp sysfs interface
for lun in os.listdir(portdir):
if lun.startswith("0x") and \
os.path.isdir(os.path.join(portdir, lun)):
log.info("Not removing WWPN %s at zFCP device %s since port still has other LUNs, e.g. %s."
%(self.wwpn, self.devnum, lun))
return True
try:
loggedWriteLineToFile(portremove, self.wwpn)
except IOError as e:
raise ValueError, _("Could not remove WWPN %(wwpn)s on zFCP "
"device %(devnum)s (%(e)s).") \
% {'wwpn': self.wwpn,
'devnum': self.devnum, 'e': e}
if os.path.exists(portadd):
# older zfcp sysfs interface
for port in os.listdir(devdir):
if port.startswith("0x") and \
os.path.isdir(os.path.join(devdir, port)):
log.info("Not setting zFCP device %s offline since it still has other ports, e.g. %s."
%(self.devnum, port))
return True
else:
# newer zfcp sysfs interface with auto port scan
import glob
luns = glob.glob("%s/0x????????????????/0x????????????????"
%(devdir,))
if len(luns) != 0:
log.info("Not setting zFCP device %s offline since it still has other LUNs, e.g. %s."
%(self.devnum, luns[0]))
return True
try:
loggedWriteLineToFile(offline, "0")
except IOError as e:
raise ValueError, _("Could not set zFCP device %(devnum)s "
"offline (%(e)s).") \
% {'devnum': self.devnum, 'e': e}
return True
class ZFCP:
""" ZFCP utility class.
This class will automatically online to ZFCP drives configured in
/tmp/fcpconfig when the startup() method gets called. It can also be
used to manually configure ZFCP devices through the addFCP() method.
As this class needs to make sure that /tmp/fcpconfig configured
drives are only onlined once and as it keeps a global list of all ZFCP
devices it is implemented as a Singleton.
"""
def __init__(self):
self.fcpdevs = []
self.hasReadConfig = False
self.down = True
# So that users can write zfcp() to get the singleton instance
def __call__(self):
return self
def readConfig(self):
try:
f = open("/tmp/fcpconfig", "r")
except IOError:
log.info("no /tmp/fcpconfig; not configuring zfcp")
return
lines = f.readlines()
f.close()
for line in lines:
# each line is a string separated list of values to describe a dev
# there are two valid formats for the line:
# devnum scsiid wwpn scsilun fcplun (scsiid + scsilun ignored)
# devnum wwpn fcplun
line = string.strip(line).lower()
if line.startswith("#"):
continue
fcpconf = string.split(line)
if len(fcpconf) == 3:
devnum = fcpconf[0]
wwpn = fcpconf[1]
fcplun = fcpconf[2]
elif len(fcpconf) == 5:
warnings.warn("SCSI ID and SCSI LUN values for ZFCP devices are ignored and deprecated.", DeprecationWarning)
devnum = fcpconf[0]
wwpn = fcpconf[2]
fcplun = fcpconf[4]
else:
log.warn("Invalid line found in /tmp/fcpconfig!")
continue
try:
self.addFCP(devnum, wwpn, fcplun)
except ValueError, e:
log.warn(str(e))
continue
def addFCP(self, devnum, wwpn, fcplun):
d = ZFCPDevice(devnum, wwpn, fcplun)
if d.onlineDevice():
self.fcpdevs.append(d)
def shutdown(self):
if self.down:
return
self.down = True
if len(self.fcpdevs) == 0:
return
for d in self.fcpdevs:
try:
d.offlineDevice()
except ValueError, e:
log.warn(str(e))
def startup(self):
if not self.down:
return
self.down = False
if not self.hasReadConfig:
self.readConfig()
self.hasReadConfig = True
# readConfig calls addFCP which calls onlineDevice already
return
if len(self.fcpdevs) == 0:
return
for d in self.fcpdevs:
try:
d.onlineDevice()
except ValueError, e:
log.warn(str(e))
def writeKS(self, f):
if len(self.fcpdevs) == 0:
return
for d in self.fcpdevs:
f.write("zfcp --devnum %s --wwpn %s --fcplun %s\n" %(d.devnum,
d.wwpn,
d.fcplun))
def write(self, instPath):
if len(self.fcpdevs) == 0:
return
f = open(instPath + "/etc/zfcp.conf", "w")
for d in self.fcpdevs:
f.write("%s\n" %(d,))
f.close()
f = open(instPath + "/etc/modprobe.conf", "a")
f.write("alias scsi_hostadapter zfcp\n")
f.close()
# Create ZFCP singleton
ZFCP = ZFCP()
# vim:tw=78:ts=4:et:sw=4
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