Initial FCoE support

This patch adds support for using FCoE during the installation. This patch
merely lays the initial ground work, there is more work todo:

- The system will not boot without manual help after the install, as
  dracut / mkinitrd do not support FCoE yet

- If FCoE is not used for / but for example for /srv, then information
  about the nic used for FCoE needs to be written in a to be defined
  config file in the system, and rc.sysinit needs to be thought to read
  this file and bring up FCoE SAN's / Fabrics not used for /

- kickstart support for FCoE still needs to be done

2 files changed, 97 insertions, 0 deletions

diff --git a/storage/__init__.py b/storage/__init__.py
index 572c7448e..03b987619 100644
--- a/storage/__init__.py
+++ b/storage/__init__.py
@@ -46,6 +46,7 @@ from devicelibs.lvm import safeLvmName
 from devicelibs.dm import name_from_dm_node
 from udev import *
 import iscsi
+import fcoe
 import zfcp
 
 import gettext
@@ -204,6 +205,7 @@ class Storage(object):
         self.__luksDevs = {}
 
         self.iscsi = iscsi.iscsi()
+        self.fcoe = fcoe.fcoe()
         self.zfcp = zfcp.ZFCP()
 
         self._nextID = 0
@@ -269,6 +271,7 @@ class Storage(object):
         w = self.anaconda.intf.waitWindow(_("Finding Devices"),
                                           _("Finding storage devices..."))
         self.iscsi.startup(self.anaconda.intf)
+        self.fcoe.startup(self.anaconda.intf)
         self.zfcp.startup()
         if self.anaconda.id.getUpgrade():
             clearPartType = CLEARPART_TYPE_NONE
@@ -913,6 +916,7 @@ class Storage(object):
     def write(self, instPath):
         self.fsset.write(instPath)
         self.iscsi.write(instPath, self.anaconda)
+        self.fcoe.write(instPath, self.anaconda)
         self.zfcp.write(instPath)
 
     def writeKS(self, f):
@@ -980,6 +984,7 @@ class Storage(object):
             f.write("\n")
 
         self.iscsi.writeKS(f)
+        self.fcoe.writeKS(f)
         self.zfcp.writeKS(f)
 
 
diff --git a/storage/fcoe.py b/storage/fcoe.py
new file mode 100644
index 000000000..46c5bcb9c
--- /dev/null
+++ b/storage/fcoe.py
@@ -0,0 +1,92 @@
+#
+# 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
+import iutil
+import logging
+import time
+log = logging.getLogger("anaconda")
+
+import gettext
+_ = lambda x: gettext.ldgettext("anaconda", x)
+
+_fcoe_module_loaded = False
+
+def has_fcoe():
+    global _fcoe_module_loaded
+    if not _fcoe_module_loaded:
+        iutil.execWithRedirect("modprobe", [ "fcoe" ],
+                               stdout = "/dev/tty5", stderr="/dev/tty5",
+                               searchPath = 1)
+        _fcoe_module_loaded = True
+
+    return os.access("/sys/module/fcoe", os.X_OK)
+
+class fcoe(object):
+    def __init__(self):
+        self.started = False
+        self.nics = []
+
+    def _stabilize(self, intf = None):
+        if intf:
+            w = intf.waitWindow(_("Connecting to FCoE SAN"),
+                                _("Connecting to FCoE SAN"))
+
+        # I have no clue how long we need to wait, this ought to do the trick
+        time.sleep(10)
+        iutil.execWithRedirect("udevadm", [ "settle" ],
+                               stdout = "/dev/tty5", stderr="/dev/tty5",
+                               searchPath = 1)
+        if intf:
+            w.pop()
+
+    def startup(self, intf = None):
+        if self.started:
+            return
+
+        if not has_fcoe():
+            return
+
+        # Place holder for adding autodetection of FCoE setups based on
+        # firmware tables (like iBFT for iSCSI)
+
+        self.started = True
+
+    def addSan(self, nic, intf=None):
+        if not has_fcoe():
+            raise IOError, _("FCoE not available")
+
+        log.info("Activating FCoE SAN attached to %s" % nic)
+
+        f = open("/sys/module/fcoe/parameters/create", "w")
+        f.write(nic)
+        f.close()
+
+        self._stabilize(intf)
+        self.nics.append(nic)
+
+    def writeKS(self, f):
+        # fixme plenty (including add ks support for fcoe in general)
+        return
+
+    def write(self, instPath, anaconda):
+        # erm, do we need todo anything here ?
+        return
+
+# vim:tw=78:ts=4:et:sw=4