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#
# zfcp.py - mainframe zfcp configuration install data
#
# Karsten Hopp <karsten@redhat.com>
#
# Copyright 2001-2004 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import string
import os
import iutil
import isys
import shutil
from rhpl.translate import _, N_
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"
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.")
self.onlineStatus = False
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:
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):
if self.onlineStatus:
return True
online = "%s/%s/online" %(zfcpsysfs, self.devnum)
portadd = "%s/%s/port_add" %(zfcpsysfs, self.devnum)
unitadd = "%s/%s/%s/unit_add" %(zfcpsysfs, self.devnum, self.wwpn)
try:
if not os.path.exists(unitadd):
loggedWriteLineToFile(portadd, self.wwpn)
loggedWriteLineToFile(unitadd, self.fcplun)
loggedWriteLineToFile(online, "1")
except Exception, e:
log.warn("error bringing zfcp device %s online: %s"
%(self.devnum, e))
return False
self.onlineStatus = True
return True
def offlineDevice(self):
if not self.onlineStatus:
return True
offline = "%s/%s/online" %(zfcpsysfs, self.devnum)
portremove = "%s/%s/port_remove" %(zfcpsysfs, self.devnum)
unitremove = "%s/%s/%s/unit_remove" %(zfcpsysfs, self.devnum, self.wwpn)
try:
loggedWriteLineToFile(offline, "0")
loggedWriteLineToFile(unitremove, self.fcplun)
loggedWriteLineToFile(portremove, self.wwpn)
except Exception, e:
log.warn("error bringing zfcp device %s offline: %s"
%(self.devnum, e))
return False
self.onlineStatus = False
return True
class ZFCP:
def __init__(self):
self.fcpdevs = []
self.hasReadConfig = False
def readConfig(self):
try:
f = open("/tmp/fcpconfig", "r")
except:
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("Invalid FCP device configuration: %s" %(e,))
continue
def addFCP(self, devnum, wwpn, fcplun):
d = ZFCPDevice(devnum, wwpn, fcplun)
if d.onlineDevice():
self.fcpdevs.append(d)
def shutdown(self):
if len(self.fcpdevs) == 0:
return
for d in self.fcpdevs:
d.offlineDevice()
def startup(self):
if not self.hasReadConfig:
self.readConfig()
self.hasReadConfig = True
if len(self.fcpdevs) == 0:
return
for d in self.fcpdevs:
d.onlineDevice()
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()
# vim:tw=78:ts=4:et:sw=4
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