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virtio-serial: report frontend connection state via monitor

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Libvirt wants to know about the guest-side connection state of some
virtio-serial ports (in particular the one(s) assigned to guest agent(s)).
Report such states with a new monitor event.

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1080376
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Laszlo Ersek 2014-06-26 17:50:02 +02:00 committed by Luiz Capitulino
parent dfab489214
commit e2ae6159de
3 changed files with 24 additions and 3 deletions
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12
hw/char/virtio-console.c
View File

@ -14,6 +14,7 @@
#include "qemu/error-report.h"
#include "trace.h"
#include "hw/virtio/virtio-serial.h"
#include "qapi-event.h"
#define TYPE_VIRTIO_CONSOLE_SERIAL_PORT "virtserialport"
#define VIRTIO_CONSOLE(obj) \
@ -81,11 +82,16 @@ static ssize_t flush_buf(VirtIOSerialPort *port,
static void set_guest_connected(VirtIOSerialPort *port, int guest_connected)
{
VirtConsole *vcon = VIRTIO_CONSOLE(port);
DeviceState *dev = DEVICE(port);
if (!vcon->chr) {
return;
if (vcon->chr) {
qemu_chr_fe_set_open(vcon->chr, guest_connected);
}
if (dev->id) {
qapi_event_send_vserport_change(dev->id, guest_connected,
&error_abort);
}
qemu_chr_fe_set_open(vcon->chr, guest_connected);
}
/* Readiness of the guest to accept data on a port */

1
monitor.c
View File

@ -588,6 +588,7 @@ static void monitor_qapi_event_init(void)
monitor_qapi_event_throttle(QAPI_EVENT_BALLOON_CHANGE, 1000);
monitor_qapi_event_throttle(QAPI_EVENT_QUORUM_REPORT_BAD, 1000);
monitor_qapi_event_throttle(QAPI_EVENT_QUORUM_FAILURE, 1000);
monitor_qapi_event_throttle(QAPI_EVENT_VSERPORT_CHANGE, 1000);
qmp_event_set_func_emit(monitor_qapi_event_queue);
}

14
qapi/event.json
View File

@ -316,3 +316,17 @@
{ 'event': 'QUORUM_REPORT_BAD',
'data': { '*error': 'str', 'node-name': 'str',
'sector-num': 'int', 'sector-count': 'int' } }
##
# @VSERPORT_CHANGE
#
# Emitted when the guest opens or closes a virtio-serial port.
#
# @id: device identifier of the virtio-serial port
#
# @open: true if the guest has opened the virtio-serial port
#
# Since: 2.1
##
{ 'event': 'VSERPORT_CHANGE',
'data': { 'id': 'str', 'open': 'bool' } }