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virtio-serial: save/load: Send target host connection status if different 

If the host connection to a port is closed on the destination machine
after migration, whereas the connection was open on the source, the
guest has to be informed of that.

Similar for a host connection open on the destination.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Amit Shah 2010-04-27 18:03:58 +05:30 committed by Anthony Liguori
parent 16af2e3c35
commit 31abe21f4f
1 changed files with 11 additions and 0 deletions
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11
hw/virtio-serial-bus.c
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@ -395,6 +395,7 @@ static void virtio_serial_save(QEMUFile *f, void *opaque)
*/
qemu_put_be32s(f, &port->id);
qemu_put_byte(f, port->guest_connected);
qemu_put_byte(f, port->host_connected);
}
}
@ -448,6 +449,7 @@ static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
/* Items in struct VirtIOSerialPort */
for (i = 0; i < nr_active_ports; i++) {
uint32_t id;
bool host_connected;
id = qemu_get_be32(f);
port = find_port_by_id(s, id);
@ -460,6 +462,15 @@ static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
}
port->guest_connected = qemu_get_byte(f);
host_connected = qemu_get_byte(f);
if (host_connected != port->host_connected) {
/*
* We have to let the guest know of the host connection
* status change
*/
send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN,
port->host_connected);
}
}
return 0;