[Qemu-discuss] Use virtio serial channel send data to vm, but vm not read data in /dev/vport0p1

[2020human]

I want to upgrade qemu,but virtio channel device  can not send data to vm.

1. I created a vm and add channel:

  <channel type='unix'>

      <source mode='bind' path='/var/lib/libvirt/qemu/r-22-VM.agent'/>

      <target type='virtio' name='r-22-VM.vport'/>

      <address type='virtio-serial' controller='0' bus='0' port='1'/>

    </channel>

2. Use scripts(run this scripts is no error output) send data to socket.

 #!/usr/bin/python

 import socket

 s=socket.socket(socket.AF_UNIX,socket.SOCK_STREAM)

 s.connect("/var/lib/libvirt/qemu/r-22-VM.agent")

 s.send("test\n")

 s.close

3. But i not read date in vm device /dev/vport0p1 .

My version, libvirt: 1.2.13.1  qmeu: 2.3.0  system: centos 6.5 (qemu 2.0+ is same problem)

qemu compile parameters:  ./configure --target-list=x86_64-softmmu --enable-kvm --enable-guest-agent --enable-rbd --enable-spice --enable-linux-aio --enable-libusb --enable-usb-redir --prefix=/usr

compile process occurs:

 CC    x86_64-softmmu/target-i386/kvm.o

  GEN   trace/generated-helpers.c

  CC    x86_64-softmmu/hw/i386/acpi-build.o

/opt/qemu-2.3.0/hw/i386/acpi-build.c: In function ‘build_append_pci_bus_devices’:

/opt/qemu-2.3.0/hw/i386/acpi-build.c:515: warning: ‘notify_method’ may be used uninitialized in this function

  CC    x86_64-softmmu/trace/generated-helpers.o

  LINK  x86_64-softmmu/qemu-system-x86_64

Run command: qemu-system-x86_64 --version  no problem.

This test  in libvirt 1.0.5.7 and qemu 1.5.3 is success， data can be received.

Please help , thanks