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# |
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# zfcp.py - mainframe zfcp configuration install data |
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# |
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# Copyright (C) 2001, 2002, 2003, 2004 Red Hat, Inc. All rights reserved. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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# Author(s): Karsten Hopp <karsten@redhat.com> |
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# |
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|
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import string |
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import os |
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from constants import * |
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from udev import udev_settle |
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|
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import gettext |
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_ = lambda x: gettext.ldgettext("anaconda", x) |
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|
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import iutil |
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import logging |
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log = logging.getLogger("anaconda") |
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|
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def loggedWriteLineToFile(fn, value): |
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f = open(fn, "w") |
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log.debug("echo %s > %s" % (value, fn)) |
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f.write("%s\n" % (value)) |
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f.close() |
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|
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zfcpsysfs = "/sys/bus/ccw/drivers/zfcp" |
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scsidevsysfs = "/sys/bus/scsi/devices" |
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zfcpconf = "/etc/zfcp.conf" |
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|
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class ZFCPDevice: |
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def __init__(self, devnum, wwpn, fcplun): |
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self.devnum = self.sanitizeDeviceInput(devnum) |
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self.wwpn = self.sanitizeWWPNInput(wwpn) |
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self.fcplun = self.sanitizeFCPLInput(fcplun) |
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|
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if not self.checkValidDevice(self.devnum): |
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raise ValueError, _("You have not specified a device number or the number is invalid") |
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if not self.checkValidWWPN(self.wwpn): |
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raise ValueError, _("You have not specified a worldwide port name or the name is invalid.") |
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if not self.checkValidFCPLun(self.fcplun): |
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raise ValueError, _("You have not specified a FCP LUN or the number is invalid.") |
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|
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def __str__(self): |
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return "%s %s %s" %(self.devnum, self.wwpn, self.fcplun) |
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|
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def sanitizeDeviceInput(self, dev): |
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if dev is None or dev == "": |
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return None |
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dev = dev.lower() |
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bus = dev[:string.rfind(dev, ".") + 1] |
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dev = dev[string.rfind(dev, ".") + 1:] |
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dev = "0" * (4 - len(dev)) + dev |
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if not len(bus): |
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return "0.0." + dev |
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else: |
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return bus + dev |
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|
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def sanitizeWWPNInput(self, id): |
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if id is None or id == "": |
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return None |
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id = id.lower() |
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if id[:2] != "0x": |
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return "0x" + id |
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return id |
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|
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# ZFCP LUNs are usually entered as 16 bit, sysfs accepts only 64 bit |
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# (#125632), expand with zeroes if necessary |
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def sanitizeFCPLInput(self, lun): |
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if lun is None or lun == "": |
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return None |
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lun = lun.lower() |
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if lun[:2] == "0x": |
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lun = lun[2:] |
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lun = "0x" + "0" * (4 - len(lun)) + lun |
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lun = lun + "0" * (16 - len(lun) + 2) |
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return lun |
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|
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def _hextest(self, hex): |
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try: |
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int(hex, 16) |
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return True |
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except TypeError: |
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return False |
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|
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def checkValidDevice(self, id): |
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if id is None or id == "": |
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return False |
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if len(id) != 8: # p.e. 0.0.0600 |
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return False |
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if id[0] not in string.digits or id[2] not in string.digits: |
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return False |
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if id[1] != "." or id[3] != ".": |
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return False |
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return self._hextest(id[4:]) |
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|
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def checkValid64BitHex(self, hex): |
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if hex is None or hex == "": |
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return False |
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if len(hex) != 18: |
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return False |
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return self._hextest(hex) |
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checkValidWWPN = checkValidFCPLun = checkValid64BitHex |
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|
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def onlineDevice(self): |
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online = "%s/%s/online" %(zfcpsysfs, self.devnum) |
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portadd = "%s/%s/port_add" %(zfcpsysfs, self.devnum) |
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portdir = "%s/%s/%s" %(zfcpsysfs, self.devnum, self.wwpn) |
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unitadd = "%s/unit_add" %(portdir) |
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unitdir = "%s/%s" %(portdir, self.fcplun) |
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failed = "%s/failed" %(unitdir) |
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|
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if not os.path.exists(online): |
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log.info("Freeing zFCP device %s" % (self.devnum,)) |
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iutil.execWithRedirect("zfcp_cio_free", ["-d", self.devnum], |
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stdout="/dev/tty5", stderr="/dev/tty5") |
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|
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if not os.path.exists(online): |
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raise ValueError, _( |
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"zFCP device %s not found, not even in device ignore list." |
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%(self.devnum,)) |
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|
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try: |
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f = open(online, "r") |
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devonline = f.readline().strip() |
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f.close() |
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if devonline != "1": |
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loggedWriteLineToFile(online, "1") |
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except IOError as e: |
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raise ValueError, _("Could not set zFCP device %(devnum)s " |
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"online (%(e)s).") \ |
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% {'devnum': self.devnum, 'e': e} |
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|
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if not os.path.exists(portdir): |
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if os.path.exists(portadd): |
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# older zfcp sysfs interface |
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try: |
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loggedWriteLineToFile(portadd, self.wwpn) |
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udev_settle() |
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except IOError as e: |
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raise ValueError, _("Could not add WWPN %(wwpn)s to zFCP " |
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"device %(devnum)s (%(e)s).") \ |
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% {'wwpn': self.wwpn, |
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'devnum': self.devnum, |
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'e': e} |
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else: |
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# newer zfcp sysfs interface with auto port scan |
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raise ValueError, _("WWPN %(wwpn)s not found at zFCP device " |
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"%(devnum)s.") % {'wwpn': self.wwpn, |
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'devnum': self.devnum} |
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else: |
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if os.path.exists(portadd): |
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# older zfcp sysfs interface |
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log.info("WWPN %(wwpn)s at zFCP device %(devnum)s already " |
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"there.") % {'wwpn': self.wwpn, |
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'devnum': self.devnum} |
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|
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if not os.path.exists(unitdir): |
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try: |
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loggedWriteLineToFile(unitadd, self.fcplun) |
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udev_settle() |
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except IOError as e: |
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raise ValueError, _("Could not add LUN %(fcplun)s to WWPN " |
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"%(wwpn)s on zFCP device %(devnum)s " |
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"(%(e)s).") \ |
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% {'fcplun': self.fcplun, 'wwpn': self.wwpn, |
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'devnum': self.devnum, 'e': e} |
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else: |
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raise ValueError, _("LUN %(fcplun)s at WWPN %(wwpn)s on zFCP " |
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"device %(devnum)s already configured.") \ |
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% {'fcplun': self.fcplun, |
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'wwpn': self.wwpn, |
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'devnum': self.devnum} |
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|
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fail = "0" |
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try: |
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f = open(failed, "r") |
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fail = f.readline().strip() |
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f.close() |
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except IOError as e: |
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raise ValueError, _("Could not read failed attribute of LUN " |
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"%(fcplun)s at WWPN %(wwpn)s on zFCP device " |
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"%(devnum)s (%(e)s).") \ |
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% {'fcplun': self.fcplun, |
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'wwpn': self.wwpn, |
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'devnum': self.devnum, |
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'e': e} |
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if fail != "0": |
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self.offlineDevice() |
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raise ValueError, _("Failed LUN %(fcplun)s at WWPN %(wwpn)s on " |
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"zFCP device %(devnum)s removed again.") \ |
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% {'fcplun': self.fcplun, |
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'wwpn': self.wwpn, |
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'devnum': self.devnum} |
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|
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return True |
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|
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def offlineSCSIDevice(self): |
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f = open("/proc/scsi/scsi", "r") |
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lines = f.readlines() |
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f.close() |
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# alternatively iterate over /sys/bus/scsi/devices/*:0:*:*/ |
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|
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for line in lines: |
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if not line.startswith("Host"): |
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continue |
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scsihost = string.split(line) |
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host = scsihost[1] |
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channel = "0" |
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id = scsihost[5] |
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lun = scsihost[7] |
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scsidev = "%s:%s:%s:%s" % (host[4:], channel, id, lun) |
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fcpsysfs = "%s/%s" % (scsidevsysfs, scsidev) |
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scsidel = "%s/%s/delete" % (scsidevsysfs, scsidev) |
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|
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f = open("%s/hba_id" %(fcpsysfs), "r") |
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fcphbasysfs = f.readline().strip() |
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f.close() |
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f = open("%s/wwpn" %(fcpsysfs), "r") |
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fcpwwpnsysfs = f.readline().strip() |
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f.close() |
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f = open("%s/fcp_lun" %(fcpsysfs), "r") |
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fcplunsysfs = f.readline().strip() |
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f.close() |
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|
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if fcphbasysfs == self.devnum \ |
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and fcpwwpnsysfs == self.wwpn \ |
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and fcplunsysfs == self.fcplun: |
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loggedWriteLineToFile(scsidel, "1") |
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udev_settle() |
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return |
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|
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log.warn("no scsi device found to delete for zfcp %s %s %s" |
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%(self.devnum, self.wwpn, self.fcplun)) |
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|
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def offlineDevice(self): |
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offline = "%s/%s/online" %(zfcpsysfs, self.devnum) |
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portadd = "%s/%s/port_add" %(zfcpsysfs, self.devnum) |
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portremove = "%s/%s/port_remove" %(zfcpsysfs, self.devnum) |
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unitremove = "%s/%s/%s/unit_remove" %(zfcpsysfs, self.devnum, self.wwpn) |
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portdir = "%s/%s/%s" %(zfcpsysfs, self.devnum, self.wwpn) |
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devdir = "%s/%s" %(zfcpsysfs, self.devnum) |
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|
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try: |
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self.offlineSCSIDevice() |
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except IOError as e: |
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raise ValueError, _("Could not correctly delete SCSI device of " |
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"zFCP %(devnum)s %(wwpn)s %(fcplun)s " |
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"(%(e)s).") \ |
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% {'devnum': self.devnum, 'wwpn': self.wwpn, |
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'fcplun': self.fcplun, 'e': e} |
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|
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try: |
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loggedWriteLineToFile(unitremove, self.fcplun) |
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except IOError as e: |
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raise ValueError, _("Could not remove LUN %(fcplun)s at WWPN " |
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"%(wwpn)s on zFCP device %(devnum)s " |
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"(%(e)s).") \ |
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% {'fcplun': self.fcplun, 'wwpn': self.wwpn, |
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'devnum': self.devnum, 'e': e} |
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|
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if os.path.exists(portadd): |
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# only try to remove ports with older zfcp sysfs interface |
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for lun in os.listdir(portdir): |
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if lun.startswith("0x") and \ |
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os.path.isdir(os.path.join(portdir, lun)): |
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log.info("Not removing WWPN %s at zFCP device %s since port still has other LUNs, e.g. %s." |
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%(self.wwpn, self.devnum, lun)) |
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return True |
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|
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try: |
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loggedWriteLineToFile(portremove, self.wwpn) |
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except IOError as e: |
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raise ValueError, _("Could not remove WWPN %(wwpn)s on zFCP " |
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"device %(devnum)s (%(e)s).") \ |
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% {'wwpn': self.wwpn, |
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'devnum': self.devnum, 'e': e} |
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|
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if os.path.exists(portadd): |
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# older zfcp sysfs interface |
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for port in os.listdir(devdir): |
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if port.startswith("0x") and \ |
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os.path.isdir(os.path.join(devdir, port)): |
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log.info("Not setting zFCP device %s offline since it still has other ports, e.g. %s." |
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%(self.devnum, port)) |
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return True |
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else: |
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# newer zfcp sysfs interface with auto port scan |
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import glob |
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luns = glob.glob("%s/0x????????????????/0x????????????????" |
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%(devdir,)) |
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if len(luns) != 0: |
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log.info("Not setting zFCP device %s offline since it still has other LUNs, e.g. %s." |
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%(self.devnum, luns[0])) |
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return True |
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|
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try: |
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loggedWriteLineToFile(offline, "0") |
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except IOError as e: |
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raise ValueError, _("Could not set zFCP device %(devnum)s " |
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"offline (%(e)s).") \ |
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% {'devnum': self.devnum, 'e': e} |
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|
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return True |
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|
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class ZFCP: |
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""" ZFCP utility class. |
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|
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This class will automatically online to ZFCP drives configured in |
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/tmp/fcpconfig when the startup() method gets called. It can also be |
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used to manually configure ZFCP devices through the addFCP() method. |
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|
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As this class needs to make sure that /tmp/fcpconfig configured |
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drives are only onlined once and as it keeps a global list of all ZFCP |
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devices it is implemented as a Singleton. |
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""" |
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|
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def __init__(self): |
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self.intf = None |
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self.fcpdevs = set() |
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self.hasReadConfig = False |
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self.down = True |
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|
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# So that users can write zfcp() to get the singleton instance |
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def __call__(self): |
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return self |
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|
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def readConfig(self): |
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try: |
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f = open(zfcpconf, "r") |
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except IOError: |
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log.info("no %s; not configuring zfcp" % (zfcpconf,)) |
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return |
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|
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lines = map(lambda x: x.strip().lower(), f.readlines()) |
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f.close() |
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|
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for line in lines: |
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if line.startswith("#") or line == '': |
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continue |
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|
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fields = line.split() |
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|
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if len(fields) == 3: |
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devnum = fields[0] |
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wwpn = fields[1] |
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fcplun = fields[2] |
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elif len(fields) == 5: |
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# support old syntax of: |
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# devno scsiid wwpn scsilun fcplun |
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devnum = fields[0] |
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wwpn = fields[2] |
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fcplun = fields[4] |
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else: |
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log.warn("Invalid line found in %s: %s" % (zfcpconf, line,)) |
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continue |
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|
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try: |
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self.addFCP(devnum, wwpn, fcplun) |
| 373 |
except ValueError, e: |
| 374 |
if self.intf: |
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self.intf.messageWindow(_("Error"), str(e)) |
| 376 |
else: |
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log.warning(str(e)) |
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|
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def addFCP(self, devnum, wwpn, fcplun): |
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d = ZFCPDevice(devnum, wwpn, fcplun) |
| 381 |
if d.onlineDevice(): |
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self.fcpdevs.add(d) |
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|
| 384 |
def shutdown(self): |
| 385 |
if self.down: |
| 386 |
return |
| 387 |
self.down = True |
| 388 |
if len(self.fcpdevs) == 0: |
| 389 |
return |
| 390 |
for d in self.fcpdevs: |
| 391 |
try: |
| 392 |
d.offlineDevice() |
| 393 |
except ValueError, e: |
| 394 |
log.warn(str(e)) |
| 395 |
|
| 396 |
def startup(self, intf=None): |
| 397 |
self.intf = intf |
| 398 |
if not self.down: |
| 399 |
return |
| 400 |
self.down = False |
| 401 |
if not self.hasReadConfig: |
| 402 |
self.readConfig() |
| 403 |
self.hasReadConfig = True |
| 404 |
# readConfig calls addFCP which calls onlineDevice already |
| 405 |
return |
| 406 |
|
| 407 |
if len(self.fcpdevs) == 0: |
| 408 |
return |
| 409 |
for d in self.fcpdevs: |
| 410 |
try: |
| 411 |
d.onlineDevice() |
| 412 |
except ValueError, e: |
| 413 |
log.warn(str(e)) |
| 414 |
|
| 415 |
def writeKS(self, f): |
| 416 |
if len(self.fcpdevs) == 0: |
| 417 |
return |
| 418 |
for d in self.fcpdevs: |
| 419 |
f.write("zfcp --devnum %s --wwpn %s --fcplun %s\n" %(d.devnum, |
| 420 |
d.wwpn, |
| 421 |
d.fcplun)) |
| 422 |
|
| 423 |
def write(self, instPath): |
| 424 |
if len(self.fcpdevs) == 0: |
| 425 |
return |
| 426 |
f = open(instPath + zfcpconf, "w") |
| 427 |
for d in self.fcpdevs: |
| 428 |
f.write("%s\n" %(d,)) |
| 429 |
f.close() |
| 430 |
|
| 431 |
f = open(instPath + "/etc/modprobe.conf", "a") |
| 432 |
f.write("alias scsi_hostadapter zfcp\n") |
| 433 |
f.close() |
| 434 |
|
| 435 |
# Create ZFCP singleton |
| 436 |
ZFCP = ZFCP() |
| 437 |
|
| 438 |
# vim:tw=78:ts=4:et:sw=4 |
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