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virtio-serial: save/restore new fields in port struct

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The new fields that got added as part of not copying over the guest
buffer to the host need to be saved/restored across migration.  Do that
and bump up the version number.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Amit Shah 2011-01-19 16:07:10 +05:30
parent f1925dff7e
commit 37f95bf3d0
1 changed files with 40 additions and 2 deletions
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42
hw/virtio-serial-bus.c
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@ -527,9 +527,24 @@ static void virtio_serial_save(QEMUFile *f, void *opaque)
* Items in struct VirtIOSerialPort.
*/
QTAILQ_FOREACH(port, &s->ports, next) {
uint32_t elem_popped;
qemu_put_be32s(f, &port->id);
qemu_put_byte(f, port->guest_connected);
qemu_put_byte(f, port->host_connected);
elem_popped = 0;
if (port->elem.out_num) {
elem_popped = 1;
}
qemu_put_be32s(f, &elem_popped);
if (elem_popped) {
qemu_put_be32s(f, &port->iov_idx);
qemu_put_be64s(f, &port->iov_offset);
qemu_put_buffer(f, (unsigned char *)&port->elem,
sizeof(port->elem));
}
}
}
@ -540,7 +555,7 @@ static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
uint32_t max_nr_ports, nr_active_ports, ports_map;
unsigned int i;
if (version_id > 2) {
if (version_id > 3) {
return -EINVAL;
}
@ -593,6 +608,29 @@ static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN,
port->host_connected);
}
if (version_id > 2) {
uint32_t elem_popped;
qemu_get_be32s(f, &elem_popped);
if (elem_popped) {
qemu_get_be32s(f, &port->iov_idx);
qemu_get_be64s(f, &port->iov_offset);
qemu_get_buffer(f, (unsigned char *)&port->elem,
sizeof(port->elem));
virtqueue_map_sg(port->elem.in_sg, port->elem.in_addr,
port->elem.in_num, 1);
virtqueue_map_sg(port->elem.out_sg, port->elem.out_addr,
port->elem.out_num, 1);
/*
* Port was throttled on source machine. Let's
* unthrottle it here so data starts flowing again.
*/
virtio_serial_throttle_port(port, false);
}
}
}
return 0;
}
@ -841,7 +879,7 @@ VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports)
* Register for the savevm section with the virtio-console name
* to preserve backward compat
*/
register_savevm(dev, "virtio-console", -1, 2, virtio_serial_save,
register_savevm(dev, "virtio-console", -1, 3, virtio_serial_save,
virtio_serial_load, vser);
return vdev;