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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
from rhpl.translate import _, N_
from rhpl.log import log
class ZFCP:
def __init__(self):
self.description = _("zSeries machines can access industry-standard SCSI devices via Fibre Channel (FCP). You need to provide 5 parameters for each device: a 16 bit device number, a 16bit SCSI ID, a 64 bit World Wide Port Name (WWPN), a 16bit SCSI LUN and a 64 bit FCP LUN.")
self.options = [
(_("Device number"), 1,
_("You have not specified a device number or the number is invalid"),
self.sanitizeDeviceInput, self.checkValidDevice),
(_("SCSI Id"), 0,
_("You have not specified a SCSI ID or the ID is invalid."),
self.sanitizeHexInput, self.checkValidID),
(_("WWPN"), 1,
_("You have not specified a worldwide port name or the name is invalid."),
self.sanitizeHexInput, self.checkValid64BitHex),
(_("SCSI LUN"), 0,
_("You have not specified a SCSI LUN or the number is invalid."),
self.sanitizeHexInput, self.checkValidID),
(_("FCP LUN"), 1,
_("You have not specified a FCP LUN or the number is invalid."),
self.sanitizeFCPLInput, self.checkValid64BitHex)]
self.readConfig()
def hextest(self, hex):
try:
string.atoi(hex, 16) # Bug in python, atoi is
return 0 # supposed to find out the base
except: # on its own
return -1
def checkValidDevice(self, id):
if id is None or id == "":
return -1
if len(id) != 8: # p.e. 0.0.0600
return -1
if id[0] not in string.digits or id[2] not in string.digits:
return -1
if id[1] != "." or id[3] != ".":
return -1
return self.hextest(id[4:])
def checkValidID(self, hex):
if hex is None or hex == "":
return -1
if len(hex) > 6:
return -1
return self.hextest(hex)
def checkValid64BitHex(self, hex):
if hex is None or hex == "":
return -1
if len(hex) != 18:
return -1
return self.hextest(hex)
def sanitizeDeviceInput(self, dev):
if dev is None or dev == "":
return None
dev = string.lower(dev)
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 sanitizeHexInput(self, id):
if id is None or id == "":
return None
id = string.lower(id)
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 = string.lower(lun)
if lun[:2] == "0x":
lun = lun[2:]
lun = "0x" + "0" * (4 - len(lun)) + lun
lun = lun + "0" * (16 - len(lun) + 2)
return lun
def updateConfig(self, fcpdevices, diskset, intf):
self.writeFcpSysfs(fcpdevices)
self.writeModprobeConf(fcpdevices)
self.writeZFCPconf(fcpdevices)
isys.flushDriveDict()
diskset.refreshDevices(intf)
try:
iutil.makeDriveDeviceNodes()
except:
pass
# remove the configuration from sysfs, required when the user
# steps backward from the partitioning screen and changes fcp configuration
def cleanFcpSysfs(self, fcpdevices):
if not len(fcpdevices):
return
on = "/sys/bus/ccw/drivers/zfcp/%s/online"
pr = "/sys/bus/ccw/drivers/zfcp/%s/port_remove"
ur = "/sys/bus/ccw/drivers/zfcp/%s/%s/unit_remove"
for i in range(len(fcpdevices)):
fno = on % (fcpdevices[i][0],)
fnp = pr % (fcpdevices[i][0],)
fnu = ur % (fcpdevices[i][0],fcpdevices[i][2],)
try:
fo = open(fno, "w")
log("echo %s > %s" % (0, fno))
fo.write("0")
fo.close()
try:
fu = open(fnu, "w")
log("echo %s > %s" % (fcpdevices[i][4], fnu))
fu.write("%s\n" % (fcpdevices[i][4],))
fu.close()
try:
fp = open(fnp, "w")
log("echo %s > %s" % (fcpdevices[i][2], fnp))
fp.write("%s\n" % (fcpdevices[i][2],))
fp.close()
except:
continue
except:
continue
except:
continue
# initialize devices via sysfs
def writeFcpSysfs(self,fcpdevices):
if not len(fcpdevices):
return
on = "/sys/bus/ccw/drivers/zfcp/%s/online"
pa = "/sys/bus/ccw/drivers/zfcp/%s/port_add"
ua = "/sys/bus/ccw/drivers/zfcp/%s/%s/unit_add"
for i in range(len(fcpdevices)):
fno = on % (fcpdevices[i][0],)
fnp = pa % (fcpdevices[i][0],)
fnu = ua % (fcpdevices[i][0],fcpdevices[i][2],)
try:
fp = open(fnp, "w")
log("echo %s > %s" % (fcpdevices[i][2], fnp))
fp.write("%s\n" % (fcpdevices[i][2],))
fp.close()
try:
fu = open(fnu, "w")
log("echo %s > %s" % (fcpdevices[i][4], fnu))
fu.write("%s\n" % (fcpdevices[i][4],))
fu.close()
try:
fo = open(fno, "w")
log("echo %s > %s" % (1, fno))
fo.write("1")
fo.close()
except:
log("opening %s failed" %(fno,))
continue
except:
log("opening %s failed" %(fnu,))
continue
except:
log("opening %s failed" %(fnp,))
continue
def writeModprobeConf(self, fcpdevices):
lines = []
try:
f = open("/tmp/modprobe.conf", "r")
lines = f.readlines()
f.close()
except:
pass
foundalias = 0
for line in lines:
if string.find(string.strip(line), "alias scsi_hostadapter zfcp") == 0:
foundalias = 1
break
if len(fcpdevices):
if not foundalias:
try:
f = open("/tmp/modprobe.conf", "a")
f.write("alias scsi_hostadapter zfcp\n")
f.close()
except:
pass
if not len(fcpdevices):
if foundalias:
try:
f = open("/tmp/modprobe.conf", "w")
for line in lines:
if string.find(string.strip(line), "alias scsi_hostadapter zfcp") != 0:
f.write(line)
f.close()
except:
pass
def writeZFCPconf(self, fcpdevices):
if not len(fcpdevices):
return
f = open("/tmp/zfcp.conf", "w")
for dev in fcpdevices:
f.write("%s %s %s %s %s\n" % (dev[0], dev[1], dev[2], dev[3], dev[4],))
f.close()
def writeKS(self,fcpdevices):
# FIXME KH not implemented yet
return
def readConfig(self):
self.fcpdevices = []
try:
f = open("/tmp/fcpconfig", "r")
except:
pass
else:
lines = f.readlines()
f.close()
for line in lines:
invalid = 0
line = string.lower(string.strip(line))
fcpconf = string.split(line)
if len(fcpconf) != 5 or fcpconf[0][:1] == "#":
continue
for i in range(len(self.options)):
fcpconf[i] = self.options[i][3](fcpconf[i])
if self.options[i][4](fcpconf[i]) == -1:
invalid = 1
break
if not invalid:
self.fcpdevices.append(fcpconf)
# vim:tw=78:ts=4:et:sw=4
|
