devicechar: Support source_master and source_slave

Needed for type=nvdm for *bsd

https://bugzilla.redhat.com/show_bug.cgi?id=1369803

tests/cli-test-xml/compare/virt-install-many-devices.xml

@@ -246,6 +246,9 @@
       <protocol type="telnet"/>
       <log file="/tmp/foo.log" append="on"/>
     </serial>
+    <serial type="nmdm">
+      <source master="/dev/foo1" slave="/dev/foo2"/>
+    </serial>
     <parallel type="udp">
       <source mode="bind" host="127.0.0.1" service="1234"/>
       <source mode="connect" host="0.0.0.0" service="1234"/>

tests/clitest.py

@@ -491,6 +491,7 @@ c.add_compare(""" \
 --input tablet \
 \
 --serial tcp,host=:2222,mode=bind,protocol=telnet,log_file=/tmp/foo.log,log_append=yes \
+--serial nmdm,source.master=/dev/foo1,source.slave=/dev/foo2 \
 --parallel udp,host=0.0.0.0:1234,bind_host=127.0.0.1:1234 \
 --parallel unix,path=/tmp/foo-socket \
 --channel pty,target_type=guestfwd,target_address=127.0.0.1:10000 \

tests/testdriver.xml

@@ -603,6 +603,9 @@ Foo bar baz & yeah boii < > yeahfoo
       <source mode='bind' host='my.source.host' service='1234'/>
       <protocol type='telnet'/>
     </serial>
+    <serial type="nmdm">
+      <source master="/dev/nmdm0A" slave="/dev/nmdm0B"/>
+    </serial>
 
 
     <!-- parallel devices -->

virtinst/cli.py

@@ -2375,6 +2375,8 @@ _ParserChar.add_arg(None, "host", cb=_ParserChar.set_host_cb)
 _ParserChar.add_arg(None, "bind_host", cb=_ParserChar.set_bind_cb)
 _ParserChar.add_arg(None, "target_address", cb=_ParserChar.set_target_cb)
 _ParserChar.add_arg("source_mode", "mode")
+_ParserChar.add_arg("source_master", "source.master")
+_ParserChar.add_arg("source_slave", "source.slave")
 _ParserChar.add_arg("log_file", "log.file")
 _ParserChar.add_arg("log_append", "log.append", is_onoff=True)
 

virtinst/devicechar.py

@@ -39,6 +39,7 @@ class _VirtualCharDevice(VirtualDevice):
     TYPE_UNIX     = "unix"
     TYPE_SPICEVMC = "spicevmc"
     TYPE_SPICEPORT = "spiceport"
+    TYPE_NMDM = "nmdm"
 
     # We don't list the non-UI friendly types here
     _TYPES_FOR_ALL = [TYPE_PTY, TYPE_DEV, TYPE_FILE,
@@ -146,6 +147,8 @@ class _VirtualCharDevice(VirtualDevice):
             "source_host"   : [self.TYPE_TCP, self.TYPE_UDP],
             "source_port"   : [self.TYPE_TCP, self.TYPE_UDP],
             "source_channel": [self.TYPE_SPICEPORT],
+            "source_master" : [self.TYPE_NMDM],
+            "source_slave"  : [self.TYPE_NMDM],
             "protocol"      : [self.TYPE_TCP],
             "bind_host"     : [self.TYPE_UDP],
             "bind_port"     : [self.TYPE_UDP],
@@ -209,6 +212,8 @@ class _VirtualCharDevice(VirtualDevice):
 
     source_channel = XMLProperty("./source/@channel",
                                  doc=_("Source channel name."))
+    source_master = XMLProperty("./source/@master")
+    source_slave = XMLProperty("./source/@slave")
 
 
     ###################