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#
# fcoe.py - fcoe class
#
# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import os
from . import util
from .udev import udev_settle
#from pyanaconda import isys
from . import ROOT_PATH
import logging
import time
log = logging.getLogger("storage")
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
_fcoe_module_loaded = False
def has_fcoe():
global _fcoe_module_loaded
if not _fcoe_module_loaded:
util.run_program(["modprobe", "fcoe"])
_fcoe_module_loaded = True
if "bnx2x" in util.lsmod():
log.info("fcoe: loading bnx2fc")
util.run_program(["modprobe", "bnx2fc"])
return os.access("/sys/module/fcoe", os.X_OK)
class fcoe(object):
""" FCoE utility class.
This class will automatically discover and connect to EDD configured
FCoE SAN's when the startup() method gets called. It can also be
used to manually configure FCoE SAN's through the addSan() method.
As this class needs to make sure certain things like starting fcoe
daemons and connecting to firmware discovered SAN's only happens once
and as it keeps a global list of all FCoE devices it is
implemented as a Singleton.
"""
def __init__(self):
self.started = False
self.lldpadStarted = False
self.nics = []
# So that users can write fcoe() to get the singleton instance
def __call__(self):
return self
def _stabilize(self):
# I have no clue how long we need to wait, this ought to do the trick
time.sleep(10)
udev_settle()
def _startEDD(self):
rc = util.capture_output(["/usr/libexec/fcoe/fcoe_edd.sh", "-i"])
if not rc.startswith("NIC="):
log.info("No FCoE EDD info found: %s" % rc.rstrip())
return
(key, val) = rc.strip().split("=", 1)
#if val not in isys.getDeviceProperties():
# log.error("Unknown FCoE NIC found in EDD: %s, ignoring" % val)
# return
log.info("FCoE NIC found in EDD: %s" % val)
self.addSan(val, dcb=True, auto_vlan=True)
def startup(self):
if self.started:
return
if not has_fcoe():
return
self._startEDD()
self.started = True
def _startLldpad(self):
if self.lldpadStarted:
return
util.run_program(["lldpad", "-d"])
self.lldpadStarted = True
def addSan(self, nic, dcb=False, auto_vlan=True):
if not has_fcoe():
raise IOError, _("FCoE not available")
log.info("Activating FCoE SAN attached to %s, dcb: %s autovlan: %s" %
(nic, dcb, auto_vlan))
util.run_program(["ip", "link", "set", nic, "up"])
if dcb:
self._startLldpad()
util.run_program(["dcbtool", "sc", nic, "dcb", "on"])
util.run_program(["dcbtool", "sc", nic, "app:fcoe",
"e:1", "a:1", "w:1"])
util.run_program(["fipvlan", "-c", "-s", "-f",
"'-fcoe'", nic])
else:
if auto_vlan:
# certain network configrations require the VLAN layer module:
util.run_program(["modprobe", "8021q"])
util.run_program(["fipvlan", '-c', '-s', '-f',
"'-fcoe'", nic])
else:
f = open("/sys/module/libfcoe/parameters/create", "w")
f.write(nic)
f.close()
self._stabilize()
self.nics.append((nic, dcb, auto_vlan))
def write(self):
if not self.nics:
return
if not os.path.isdir(ROOT_PATH + "/etc/fcoe"):
os.makedirs(ROOT_PATH + "/etc/fcoe", 0755)
for nic, dcb, auto_vlan in self.nics:
fd = os.open(ROOT_PATH + "/etc/fcoe/cfg-" + nic,
os.O_RDWR | os.O_CREAT)
os.write(fd, '# Created by anaconda\n')
os.write(fd, '# Enable/Disable FCoE service at the Ethernet port\n')
os.write(fd, 'FCOE_ENABLE="yes"\n')
os.write(fd, '# Indicate if DCB service is required at the Ethernet port\n')
if dcb:
os.write(fd, 'DCB_REQUIRED="yes"\n')
else:
os.write(fd, 'DCB_REQUIRED="no"\n')
os.write(fd, '# Indicate if VLAN discovery should be handled by fcoemon\n')
if auto_vlan:
os.write(fd, 'AUTO_VLAN="yes"\n')
else:
os.write(fd, 'AUTO_VLAN="no"\n')
os.close(fd)
return
# Create FCoE singleton
fcoe = fcoe()
# vim:tw=78:ts=4:et:sw=4
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