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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
from rhpl.translate import _, N_
from rhpl.log import log
class ZFCP:
def __init__(self):
self.readConfig()
# 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 write(self, instPath):
if not len(self.fcpdevices):
return
if not os.path.isdir("%s/etc/" %(instPath,)):
iutil.mkdirChain("%s/etc/" %(instPath,))
fn = "%s/etc/zfcp.conf" % (instPath,)
f = open(fn, "w")
os.chmod(fn, 0644)
for dev in self.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:
line = string.lower(string.strip(line))
fcpconf = string.split(line)
if len(line) > 0 and (len(fcpconf) != 5 or fcpconf[0][:1] == "#"): # nonempty but invalid line or comment
continue
for i in range(1,5):
if fcpconf[i][:2] != "0x":
fcpconf[i] = "0x" + fcpconf[i]
fcpconf[4] = self.expandLun(fcpconf[4])
self.fcpdevices.append(fcpconf)
def sanityCheckHexValue(self, length, value):
# FIXME: do a real checking if this is a valid hex value
if len(value) == length:
return None
else:
return _("Invalid input. Entered string must have %d characters") % length
# ZFCP LUNs are usually entered as 16 bit, sysfs accepts only 64 bit
# (#125632), expand with zeroes if necessary
def expandLun(self, lun):
if lun[:2] == "0x":
lun = lun[2:]
lun = "0x" + "0" * (4 - len(lun)) + lun
lun = lun + "0" * (16 - len(lun) + 2)
return lun
# vim:tw=78:ts=4:et:sw=4
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