[Kimchi-devel] [PATCH] [Kimchi 4/4] Make detach device return an AsyncTask

[pvital at linux.vnet.ibm.com]

From: Paulo Vital <pvital at linux.vnet.ibm.com>

Modified VMHostDev class to be an AsyncResource and return an AsyncTask when
deleting a specific resource (a.k.a. detach a device from a VM).

This patch is part of the solution for Kimchi Issue #817

Signed-off-by: Paulo Vital <pvital at linux.vnet.ibm.com>
---
 control/vm/hostdevs.py |  4 ++--
 model/vmhostdevs.py    | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/control/vm/hostdevs.py b/control/vm/hostdevs.py
index b0c4d1d..e9fd5dc 100644
--- a/control/vm/hostdevs.py
+++ b/control/vm/hostdevs.py
@@ -17,7 +17,7 @@
 # License along with this library; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 
-from wok.control.base import AsyncCollection, Resource
+from wok.control.base import AsyncCollection, AsyncResource
 from wok.control.utils import UrlSubNode
 
 
@@ -46,7 +46,7 @@ class VMHostDevs(AsyncCollection):
         })
 
 
-class VMHostDev(Resource):
+class VMHostDev(AsyncResource):
     def __init__(self, model, vmid, ident):
         super(VMHostDev, self).__init__(model, ident)
         self.vmid = vmid
diff --git a/model/vmhostdevs.py b/model/vmhostdevs.py
index 0cdf032..9057894 100644
--- a/model/vmhostdevs.py
+++ b/model/vmhostdevs.py
@@ -452,6 +452,8 @@ class VMHostDevsModel(object):
 class VMHostDevModel(object):
     def __init__(self, **kargs):
         self.conn = kargs['conn']
+        self.objstore = kargs['objstore']
+        self.task = TaskModel(**kargs)
 
     def lookup(self, vmid, dev_name):
         dom = VMModel.get_vm(vmid, self.conn)
@@ -489,6 +491,23 @@ class VMHostDevModel(object):
             raise NotFoundError('KCHVMHDEV0001E',
                                 {'vmid': vmid, 'dev_name': dev_name})
 
+        task_params = {'vmid': vmid,
+                       'dev_name': dev_name,
+                       'dom': dom,
+                       'hostdev': hostdev}
+        task_uri = u'/plugins/kimchi/vms/%s/hostdevs/%s' % \
+            (VMModel.get_vm(vmid, self.conn).name(), dev_name)
+        taskid = add_task(task_uri, self._detach_device, self.objstore,
+                          task_params)
+        return self.task.lookup(taskid)
+
+    def _detach_device(self, cb, params):
+        cb('Detaching device.')
+        vmid = params['vmid']
+        dev_name = params['dev_name']
+        dom = params['dom']
+        hostdev = params['hostdev']
+
         pci_devs = [(DeviceModel.deduce_dev_name(e, self.conn), e)
                     for e in hostdev if e.attrib['type'] == 'pci']
 
@@ -502,11 +521,14 @@ class VMHostDevModel(object):
         for e in hostdev:
             if DeviceModel.deduce_dev_name(e, self.conn) == dev_name:
                 xmlstr = etree.tostring(e)
+                cb('Detaching device from VM...')
                 dom.detachDeviceFlags(
                     xmlstr, get_vm_config_flag(dom, mode='all'))
                 if e.attrib['type'] == 'pci':
+                    cb('Deleting affected PCI devices...')
                     self._delete_affected_pci_devices(dom, dev_name, pci_devs)
                 if is_3D_device:
+                    cb('Updating MMIO from VM...')
                     devsmodel = VMHostDevsModel(conn=self.conn)
                     devsmodel.update_mmio_guest(vmid, False)
                 break
@@ -514,6 +536,8 @@ class VMHostDevModel(object):
             raise NotFoundError('KCHVMHDEV0001E',
                                 {'vmid': vmid, 'dev_name': dev_name})
 
+        cb('OK', True)
+
     def _delete_affected_pci_devices(self, dom, dev_name, pci_devs):
         dev_model = DeviceModel(conn=self.conn)
         try:
-- 
2.5.5