add attribute to add the board's ethernet interface to the jail..

bitelab/__init__.py

@@ -73,6 +73,20 @@ def new_parse_socket_addr(domain, addr):
 
 tcp_server.parse_socket_addr = new_parse_socket_addr
 
+class EtherIface(DefROAttribute):
+	defattrname = 'eiface'
+
+	async def activate(self, brd):
+		cmd = ('ifconfig', self._value, 'vnet', brd.name,)
+		sub = await asyncio.create_subprocess_exec(*cmd,
+		    stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL,
+		    stderr=subprocess.DEVNULL)
+
+		ret = await sub.wait()
+
+		if ret:
+			raise RuntimeError('activate failed: %d' % ret)
+
 class SerialConsole(DefROAttribute):
 	defattrname = 'console'
 
@@ -963,3 +977,30 @@ class TestAttrs(unittest.IsolatedAsyncioTestCase):
 		wrap_subprocess_exec(cse, retcode=1)
 		with self.assertRaises(RuntimeError):
 			await sc.activate(brd)
+
+	@patch('asyncio.create_subprocess_exec')
+	async def test_etheriface(self, cse):
+		eiface = 'aneiface'
+
+		ei = EtherIface(eiface)
+
+		self.assertEqual(ei.defattrname, 'eiface')
+
+		self.assertEqual(eiface, await ei.getvalue())
+
+		with self.assertRaises(TypeError):
+			await ei.setvalue('randomdata')
+
+		brd = BoardImpl('foo', 'bar', [ ei ])
+
+		wrap_subprocess_exec(cse, retcode=0)
+
+		await ei.activate(brd)
+
+		cse.assert_called_with('ifconfig', eiface, 'vnet', 'foo',
+		    stdin=subprocess.DEVNULL, stdout=subprocess.DEVNULL,
+		    stderr=subprocess.DEVNULL)
+
+		wrap_subprocess_exec(cse, retcode=1)
+		with self.assertRaises(RuntimeError):
+			await ei.activate(brd)