dom0/qvm-usb: Automatically create XS directory for USB devices

README.pvusb

@@ -34,12 +34,6 @@ In dom0, after each dom0 reboot:
  sudo ./install-pvusb-dom0.sh
 FIXME: merge the installer into some rpm
 
-In dom0, after each usbvm reboot:
- usbvm_xid=`xl list | awk '($1=="usbvm"){print $2}'`
- xenstore-write /local/domain/${usbvm_xid}/qubes-usb-devices ''
- xenstore-chmod /local/domain/${usbvm_xid}/qubes-usb-devices n0 b${usbvm_xid}
-FIXME: some kind of hook in dom0?
-
 In usbvm, after each reboot:
  sudo ./install-pvusb-backend.sh 
 FIXME: convert the installer into "qubes-pvusb-backend" rpm?

dom0/qvm-core/qubes.py

@@ -874,6 +874,10 @@ class QubesVm(object):
                 "{0}/qubes-block-devices".format(domain_path),
                 '')
 
+        xs.write('',
+                "{0}/qubes-usb-devices".format(domain_path),
+                '')
+
         xs.write('', "{0}/qubes-debug-mode".format(domain_path),
                 str(int(self.debug)))
 
@@ -884,6 +888,8 @@ class QubesVm(object):
                 [{ 'dom': xid }])
         xs.set_permissions('', '{0}/qubes-block-devices'.format(domain_path),
                 [{ 'dom': xid }])
+        xs.set_permissions('', '{0}/qubes-usb-devices'.format(domain_path),
+                [{ 'dom': xid }])
 
     def get_rootdev(self, source_template=None):
         if self.template:

install-pvusb-dom0.sh

@@ -9,4 +9,5 @@
 cp misc/xl-qvm-usb-attach.py /usr/lib/qubes/xl-qvm-usb-attach.py
 cp misc/xl-qvm-usb-detach.py /usr/lib/qubes/xl-qvm-usb-detach.py
 cp dom0/qvm-core/qubesutils.py /usr/lib64/python2.6/site-packages/qubes/qubesutils.py
+cp dom0/qvm-core/qubes.py /usr/lib64/python2.6/site-packages/qubes/qubes.py
 cp dom0/qvm-tools/qvm-usb /usr/bin/qvm-usb