# HG changeset patch
# User emellor@xxxxxxxxxxxxxxxxxxxxxx
# Node ID 4ba11726df733522f0eb5aca5b068672b8670466
# Parent 857b79d279935d4eeb6b5ec6732a49c748c4151a
Added diagnosis tool for broken domains.
Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>
diff -r 857b79d27993 -r 4ba11726df73 tools/python/xen/util/diagnose.py
--- /dev/null Wed Oct 19 12:37:16 2005
+++ b/tools/python/xen/util/diagnose.py Wed Oct 19 12:59:22 2005
@@ -0,0 +1,148 @@
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# Copyright (c) 2005 XenSource Ltd
+
+
+import re
+import sys
+
+from xen.xend import sxp
+
+from xen.xend.XendClient import server
+from xen.xend.XendError import XendError
+from xen.xend.xenstore.xstransact import xstransact
+
+import xen.xend.XendProtocol
+
+
+domain = None
+domid = None
+deviceClass = None
+device = None
+frontendPath = None
+backendPath = None
+
+
+def diagnose(dom):
+ global domain
+ global domid
+ global dompath
+
+ try:
+ domain = server.xend_domain(dom)
+ state = sxp.child_value(domain, 'state')
+ domid = int(sxp.child_value(domain, 'domid'))
+ name = sxp.child_value(domain, 'name')
+ dompath = '/local/domain/%d' % domid
+
+ print "Domain ID is %d." % domid
+ print "Domain name is %s." % name
+
+ if not state:
+ raise XendError("Cannot find state")
+
+ if state.find('c') != -1:
+ print "Domain has crashed."
+
+ diagnose_console()
+
+ diagnose_devices()
+ except xen.xend.XendProtocol.XendError, exn:
+ print exn
+
+
+def diagnose_console():
+ port = xstransact.Read(dompath + '/console/port')
+ ringref = xstransact.Read(dompath + '/console/ring-ref')
+ tty = xstransact.Read(dompath + '/console/tty')
+
+ if not port:
+ print "Console port is missing; Xend has failed."
+ if not ringref:
+ print "Console ring-ref is missing; Xend has failed."
+ if not tty:
+ print "Console tty is missing; Xenconsoled has failed."
+
+
+def diagnose_devices():
+ global deviceClass
+ global device
+ global frontendPath
+ global backendPath
+
+ device_path = dompath + '/device'
+
+ device_classes = xstransact.List(device_path)
+
+ print "Found %d device classes in use." % len(device_classes)
+
+ for dc in device_classes:
+ deviceClass = dc
+ device_class_path = device_path + '/' + deviceClass
+
+ devices = xstransact.List(device_class_path)
+
+ print "Found %d %s devices." % (len(devices), deviceClass)
+
+ for d in devices:
+ device = d
+
+ print "Found device %s, %s." % (deviceClass, device)
+
+ frontendPath = device_class_path + '/' + device
+ backendPath = xstransact.Read(frontendPath, 'backend')
+
+ if not backendPath:
+ print ("Cannot find backend path for device %s, %s." %
+ (deviceClass, device))
+ else:
+ backend_error = xstransact.Read(backendPath, 'error')
+
+ if backend_error:
+ diagnose_device_error(backend_error)
+
+
+def diagnose_device_error(err):
+ if re.search("2 reading .*/ring-ref and event-channel", err):
+ print ("Backend is stuck waiting for frontend for device %s, %s." %
+ (deviceClass, device))
+ diagnose_stuck_frontend()
+ else:
+ print ("Device %s, %s shows error %s." %
+ (deviceClass, device, err))
+
+
+def diagnose_stuck_frontend():
+ if deviceClass == "vbd":
+ phy = xstransact.Read(backendPath, 'physical-device')
+
+ if phy:
+ print ("Device %s, %s hotplugging has completed successfully." %
+ (deviceClass, device))
+ else:
+ print ("Device %s, %s hotplugging failed." %
+ (deviceClass, device))
+
+
+def main(argv = None):
+ if argv is None:
+ argv = sys.argv
+
+ diagnose(argv[1])
+
+ return 0
+
+
+if __name__ == "__main__":
+ sys.exit(main())
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