* GNU GPL, version 2 or (at your option) any later version.
*/
-#include "iov.h"
-#include "monitor.h"
-#include "qemu-queue.h"
+#include "qemu/iov.h"
+#include "monitor/monitor.h"
+#include "qemu/queue.h"
#include "sysbus.h"
#include "trace.h"
#include "virtio-serial.h"
uint32_t max_nr_ports;
};
+typedef struct VirtIOSerialPostLoad {
+ QEMUTimer *timer;
+ uint32_t nr_active_ports;
+ struct {
+ VirtIOSerialPort *port;
+ uint8_t host_connected;
+ } *connected;
+} VirtIOSerialPostLoad;
+
struct VirtIOSerial {
VirtIODevice vdev;
uint32_t *ports_map;
struct virtio_console_config config;
+
+ struct VirtIOSerialPostLoad *post_load;
};
static VirtIOSerialPort *find_port_by_id(VirtIOSerial *vser, uint32_t id)
do_flush_queued_data(port, port->ovq, &port->vser->vdev);
}
-static size_t send_control_msg(VirtIOSerialPort *port, void *buf, size_t len)
+static size_t send_control_msg(VirtIOSerial *vser, void *buf, size_t len)
{
VirtQueueElement elem;
VirtQueue *vq;
- struct virtio_console_control *cpkt;
- vq = port->vser->c_ivq;
+ vq = vser->c_ivq;
if (!virtio_queue_ready(vq)) {
return 0;
}
return 0;
}
- cpkt = (struct virtio_console_control *)buf;
- stl_p(&cpkt->id, port->id);
memcpy(elem.in_sg[0].iov_base, buf, len);
virtqueue_push(vq, &elem, len);
- virtio_notify(&port->vser->vdev, vq);
+ virtio_notify(&vser->vdev, vq);
return len;
}
-static size_t send_control_event(VirtIOSerialPort *port, uint16_t event,
- uint16_t value)
+static size_t send_control_event(VirtIOSerial *vser, uint32_t port_id,
+ uint16_t event, uint16_t value)
{
struct virtio_console_control cpkt;
+ stl_p(&cpkt.id, port_id);
stw_p(&cpkt.event, event);
stw_p(&cpkt.value, value);
- trace_virtio_serial_send_control_event(port->id, event, value);
- return send_control_msg(port, &cpkt, sizeof(cpkt));
+ trace_virtio_serial_send_control_event(port_id, event, value);
+ return send_control_msg(vser, &cpkt, sizeof(cpkt));
}
/* Functions for use inside qemu to open and read from/write to ports */
}
/* Send port open notification to the guest */
port->host_connected = true;
- send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
+ send_control_event(port->vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 1);
return 0;
}
port->throttled = false;
discard_vq_data(port->ovq, &port->vser->vdev);
- send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 0);
+ send_control_event(port->vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 0);
return 0;
}
if (use_multiport(port->vser) && !port->guest_connected) {
return 0;
}
- virtqueue_get_avail_bytes(vq, &bytes, NULL);
+ virtqueue_get_avail_bytes(vq, &bytes, NULL, 4096, 0);
return bytes;
}
* ports we have here.
*/
QTAILQ_FOREACH(port, &vser->ports, next) {
- send_control_event(port, VIRTIO_CONSOLE_PORT_ADD, 1);
+ send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_ADD, 1);
}
return;
}
* up to hvc.
*/
if (vsc->is_console) {
- send_control_event(port, VIRTIO_CONSOLE_CONSOLE_PORT, 1);
+ send_control_event(vser, port->id, VIRTIO_CONSOLE_CONSOLE_PORT, 1);
}
if (port->name) {
+ stl_p(&cpkt.id, port->id);
stw_p(&cpkt.event, VIRTIO_CONSOLE_PORT_NAME);
stw_p(&cpkt.value, 1);
memcpy(buffer + sizeof(cpkt), port->name, strlen(port->name));
buffer[buffer_len - 1] = 0;
- send_control_msg(port, buffer, buffer_len);
+ send_control_msg(vser, buffer, buffer_len);
g_free(buffer);
}
if (port->host_connected) {
- send_control_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
+ send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 1);
}
/*
}
}
-static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
+static void virtio_serial_post_load_timer_cb(void *opaque)
{
+ uint32_t i;
VirtIOSerial *s = opaque;
VirtIOSerialPort *port;
+ uint8_t host_connected;
+
+ if (!s->post_load) {
+ return;
+ }
+ for (i = 0 ; i < s->post_load->nr_active_ports; ++i) {
+ port = s->post_load->connected[i].port;
+ host_connected = s->post_load->connected[i].host_connected;
+ if (host_connected != port->host_connected) {
+ /*
+ * We have to let the guest know of the host connection
+ * status change
+ */
+ send_control_event(s, port->id, VIRTIO_CONSOLE_PORT_OPEN,
+ port->host_connected);
+ }
+ }
+ g_free(s->post_load->connected);
+ qemu_free_timer(s->post_load->timer);
+ g_free(s->post_load);
+ s->post_load = NULL;
+}
+
+static int fetch_active_ports_list(QEMUFile *f, int version_id,
+ VirtIOSerial *s, uint32_t nr_active_ports)
+{
+ uint32_t i;
+
+ s->post_load = g_malloc0(sizeof(*s->post_load));
+ s->post_load->nr_active_ports = nr_active_ports;
+ s->post_load->connected =
+ g_malloc0(sizeof(*s->post_load->connected) * nr_active_ports);
+
+ s->post_load->timer = qemu_new_timer_ns(vm_clock,
+ virtio_serial_post_load_timer_cb,
+ s);
+
+ /* Items in struct VirtIOSerialPort */
+ for (i = 0; i < nr_active_ports; i++) {
+ VirtIOSerialPort *port;
+ uint32_t id;
+
+ id = qemu_get_be32(f);
+ port = find_port_by_id(s, id);
+ if (!port) {
+ return -EINVAL;
+ }
+
+ port->guest_connected = qemu_get_byte(f);
+ s->post_load->connected[i].port = port;
+ s->post_load->connected[i].host_connected = qemu_get_byte(f);
+
+ 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);
+ }
+ }
+ }
+ qemu_mod_timer(s->post_load->timer, 1);
+ return 0;
+}
+
+static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
+{
+ VirtIOSerial *s = opaque;
uint32_t max_nr_ports, nr_active_ports, ports_map;
unsigned int i;
int ret;
qemu_get_be32s(f, &nr_active_ports);
- /* 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);
- if (!port) {
- return -EINVAL;
- }
-
- 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);
- }
-
- 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);
- }
+ if (nr_active_ports) {
+ ret = fetch_active_ports_list(f, version_id, s, nr_active_ports);
+ if (ret) {
+ return ret;
}
}
return 0;
static void add_port(VirtIOSerial *vser, uint32_t port_id)
{
mark_port_added(vser, port_id);
-
- send_control_event(find_port_by_id(vser, port_id),
- VIRTIO_CONSOLE_PORT_ADD, 1);
+ send_control_event(vser, port_id, VIRTIO_CONSOLE_PORT_ADD, 1);
}
static void remove_port(VirtIOSerial *vser, uint32_t port_id)
vser->ports_map[i] &= ~(1U << (port_id % 32));
port = find_port_by_id(vser, port_id);
+ /*
+ * This function is only called from qdev's unplug callback; if we
+ * get a NULL port here, we're in trouble.
+ */
+ assert(port);
+
/* Flush out any unconsumed buffers first */
discard_vq_data(port->ovq, &port->vser->vdev);
- send_control_event(port, VIRTIO_CONSOLE_PORT_REMOVE, 1);
+ send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_REMOVE, 1);
}
static int virtser_port_qdev_init(DeviceState *qdev)
vser->qdev = dev;
+ vser->post_load = NULL;
+
/*
* Register for the savevm section with the virtio-console name
* to preserve backward compat
g_free(vser->ivqs);
g_free(vser->ovqs);
g_free(vser->ports_map);
-
+ if (vser->post_load) {
+ g_free(vser->post_load->connected);
+ qemu_del_timer(vser->post_load->timer);
+ qemu_free_timer(vser->post_load->timer);
+ g_free(vser->post_load);
+ }
virtio_cleanup(vdev);
}
k->props = virtser_props;
}
-static TypeInfo virtio_serial_port_type_info = {
+static const TypeInfo virtio_serial_port_type_info = {
.name = TYPE_VIRTIO_SERIAL_PORT,
.parent = TYPE_DEVICE,
.instance_size = sizeof(VirtIOSerialPort),
projects / qemu.git / blobdiff