[Qemu-devel] Monitor socket will close after parse command error. Qemu-2.6.2

[Sam]

Hi all,

I'm using HMP socket to send command to add netdev, my command like this:

address@hidden tests]$ sudo  python monitor.py 55919
> (qemu):
>  Connected to qemu monitor ...
> on_monitor_open
> ds
> (qemu):
> {'return': ["unknown command: 'ds'"]}
> chardev-add
> socket,id=char-test_intf1,path=/usr/local/var/run/openvswitch/test_intf1,server=on
> (qemu):
> \{'return': []}
> netdev_add vhost-user,id=test_intf1,chardev=char-test_intf1,vhostforce=on
> (qemu):
> {'return': ["unknown command: '\\netdev_add'"]}
> netdev_add vhost-user,id=test_intf1,chardev=char-test_intf1,vhostforce=on
> (qemu):
> {'return': []}
> device_add
> virtio-net-pci,netdev=test_intf1,mac=00:22:79:29:d2:6c,id=netdev-test_intf1
> (qemu):
> {'return': []}
> device_del netdev-test_intf1
> (qemu):
> {'return': []}
> netdev_del test_intf1
> (qemu):
> {'return': []}
> chardev-remove char-test_intf1
> (qemu):
> {'return': ["Chardev 'char-test_intf1' is busy"]}
> chardev-remove char-test_intf1
> (qemu):
> {'return': ["Chardev 'char-test_intf1' is busy"]}
> ds
> (qemu):
> {'return': ["unknown command: 'ds'"]}
> chardev-add
> socket,id=char-test_intf1,path=/usr/local/var/run/openvswitch/test_intf1,server=on
> (qemu):
> {'return': ["Duplicate ID 'char-test_intf1' for chardev", 'Parsing chardev
> args failed']}
> netdev_add vhost-user,id=test_intf1,chardev=char-test_intf1,vhostforce=on
> (qemu):
> on_monitor_close
> Disconnect ...
> Bye...
> address@hidden tests]$ telnet 127.0.0.1 55919
> Trying 127.0.0.1...
> telnet: connect to address 127.0.0.1: Connection refused


the monitor.py is same like telnet, which send command to 127.0.0.1:55919
socket.
At the last 5th line, you could see "on_monitor_close", this is because
server side of 127.0.0.1:55919 socket is down.

I have few questions:
1. Why I got "{'return': ["Chardev 'char-test_intf1' is busy"]}" while
using "chardev-remove char-test_intf1"?
2. Why the server side will close while get "{'return': ["Duplicate ID
'char-test_intf1' for chardev", 'Parsing chardev args failed']}" and then
send same command?

Thank you~