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charliebrady |
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# fcoe.py - fcoe class |
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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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import iutil |
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import isys |
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import logging |
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import time |
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from 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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self.ksnics = [] |
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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, intf = None): |
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if intf: |
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w = intf.waitWindow(_("Connecting to FCoE SAN"), |
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_("Connecting to FCoE SAN")) |
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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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if intf: |
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w.pop() |
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def _startEDD(self, intf = None): |
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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) |
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return |
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(key, val) = rc.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, intf=intf) |
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def startup(self, intf = None): |
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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(intf) |
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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, intf=None): |
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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(intf) |
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self.nics.append((nic, dcb, auto_vlan)) |
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def writeKS(self, f): |
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for nic, dcb, auto_vlan in self.nics: |
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if nic in self.ksnics: |
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line = "fcoe --nic %s" % nic |
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if dcb: |
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line += " --dcb" |
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if auto_vlan: |
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line += " --autovlan" |
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line += "\n" |
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f.write(line) |
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def write(self, instPath, anaconda): |
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if not self.nics: |
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return |
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if not os.path.isdir(instPath + "/etc/fcoe"): |
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os.makedirs(instPath + "/etc/fcoe", 0755) |
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for nic, dcb, auto_vlan in self.nics: |
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fd = os.open(instPath + "/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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