175 lines
6.2 KiB
Python
175 lines
6.2 KiB
Python
#
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# fcoe.py - fcoe class
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#
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# Copyright (C) 2009 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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import os
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from pyanaconda import iutil
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from pyanaconda import isys
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from pyanaconda.constants import ROOT_PATH
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import logging
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import time
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from pyanaconda.flags import flags
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log = logging.getLogger("anaconda")
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import gettext
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_ = lambda x: gettext.ldgettext("anaconda", x)
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_fcoe_module_loaded = False
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def has_fcoe():
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global _fcoe_module_loaded
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if not _fcoe_module_loaded:
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iutil.execWithRedirect("modprobe", [ "fcoe" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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_fcoe_module_loaded = True
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if "bnx2x" in iutil.lsmod():
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log.info("fcoe: loading bnx2fc")
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iutil.execWithRedirect("modprobe", [ "bnx2fc" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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return os.access("/sys/module/fcoe", os.X_OK)
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class fcoe(object):
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""" FCoE utility class.
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This class will automatically discover and connect to EDD configured
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FCoE SAN's when the startup() method gets called. It can also be
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used to manually configure FCoE SAN's through the addSan() method.
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As this class needs to make sure certain things like starting fcoe
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daemons and connecting to firmware discovered SAN's only happens once
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and as it keeps a global list of all FCoE devices it is
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implemented as a Singleton.
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"""
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def __init__(self):
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self.started = False
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self.lldpadStarted = False
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self.nics = []
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# So that users can write fcoe() to get the singleton instance
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def __call__(self):
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return self
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def _stabilize(self):
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# I have no clue how long we need to wait, this ought to do the trick
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time.sleep(10)
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iutil.execWithRedirect("udevadm", [ "settle" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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def _startEDD(self):
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rc = iutil.execWithCapture("/usr/libexec/fcoe/fcoe_edd.sh", [ "-i" ],
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stderr="/dev/tty5")
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if not rc.startswith("NIC="):
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log.info("No FCoE EDD info found: %s" % rc.rstrip())
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return
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(key, val) = rc.strip().split("=", 1)
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if val not in isys.getDeviceProperties():
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log.error("Unknown FCoE NIC found in EDD: %s, ignoring" % val)
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return
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log.info("FCoE NIC found in EDD: %s" % val)
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self.addSan(val, dcb=True, auto_vlan=True)
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def startup(self):
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if self.started:
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return
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if not has_fcoe():
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return
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self._startEDD()
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self.started = True
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def _startLldpad(self):
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if self.lldpadStarted:
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return
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iutil.execWithRedirect("lldpad", [ "-d" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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self.lldpadStarted = True
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def addSan(self, nic, dcb=False, auto_vlan=True):
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if not has_fcoe():
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raise IOError, _("FCoE not available")
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log.info("Activating FCoE SAN attached to %s, dcb: %s autovlan: %s" %
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(nic, dcb, auto_vlan))
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iutil.execWithRedirect("ip", [ "link", "set", nic, "up" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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if dcb:
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self._startLldpad()
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iutil.execWithRedirect("dcbtool", [ "sc", nic, "dcb", "on" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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iutil.execWithRedirect("dcbtool", [ "sc", nic, "app:fcoe",
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"e:1", "a:1", "w:1" ],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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iutil.execWithRedirect("fipvlan", [ "-c", "-s", "-f",
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"'-fcoe'", nic],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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else:
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if auto_vlan:
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# certain network configrations require the VLAN layer module:
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iutil.execWithRedirect("modprobe", ["8021q"],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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iutil.execWithRedirect("fipvlan", ['-c', '-s', '-f',
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"'-fcoe'", nic],
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stdout = "/dev/tty5", stderr="/dev/tty5")
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else:
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f = open("/sys/module/libfcoe/parameters/create", "w")
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f.write(nic)
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f.close()
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self._stabilize()
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self.nics.append((nic, dcb, auto_vlan))
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def write(self):
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if not self.nics:
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return
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if not os.path.isdir(ROOT_PATH + "/etc/fcoe"):
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os.makedirs(ROOT_PATH + "/etc/fcoe", 0755)
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for nic, dcb, auto_vlan in self.nics:
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fd = os.open(ROOT_PATH + "/etc/fcoe/cfg-" + nic,
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os.O_RDWR | os.O_CREAT)
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os.write(fd, '# Created by anaconda\n')
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os.write(fd, '# Enable/Disable FCoE service at the Ethernet port\n')
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os.write(fd, 'FCOE_ENABLE="yes"\n')
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os.write(fd, '# Indicate if DCB service is required at the Ethernet port\n')
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if dcb:
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os.write(fd, 'DCB_REQUIRED="yes"\n')
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else:
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os.write(fd, 'DCB_REQUIRED="no"\n')
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os.write(fd, '# Indicate if VLAN discovery should be handled by fcoemon\n')
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if auto_vlan:
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os.write(fd, 'AUTO_VLAN="yes"\n')
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else:
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os.write(fd, 'AUTO_VLAN="no"\n')
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os.close(fd)
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return
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# Create FCoE singleton
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fcoe = fcoe()
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# vim:tw=78:ts=4:et:sw=4
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