From e6a683c844845c53bcf14f9fb3ea175331eaca0c Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 5 Sep 2012 09:21:44 +0200
Subject: [PATCH 365/366] usb-redir: Add support for migration
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
hw/usb/redirect.c | 331 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 328 insertions(+), 3 deletions(-)
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index d8568ae..8dbb722 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -65,8 +65,8 @@ struct endp_data {
uint8_t bufpq_prefilled;
uint8_t bufpq_dropping_packets;
QTAILQ_HEAD(, buf_packet) bufpq;
- int bufpq_size;
- int bufpq_target_size;
+ int32_t bufpq_size;
+ int32_t bufpq_target_size;
};
struct PacketIdQueueEntry {
@@ -241,6 +241,11 @@ static int usbredir_write(void *priv, uint8_t *data, int count)
return 0;
}
+ /* Don't send new data to the chardev until our state is fully synced */
+ if (!runstate_check(RUN_STATE_RUNNING)) {
+ return 0;
+ }
+
r = qemu_chr_fe_write(dev->cs, data, count);
if (r < 0) {
@@ -868,6 +873,7 @@ static void usbredir_chardev_open(USBRedirDevice *dev)
{
uint32_t caps[USB_REDIR_CAPS_SIZE] = { 0, };
char version[32];
+ int flags = 0;
/* Make sure any pending closes are handled (no-op if none pending) */
usbredir_chardev_close_bh(dev);
@@ -903,7 +909,12 @@ static void usbredir_chardev_open(USBRedirDevice *dev)
usbredirparser_caps_set_cap(caps, usb_redir_cap_filter);
usbredirparser_caps_set_cap(caps, usb_redir_cap_ep_info_max_packet_size);
usbredirparser_caps_set_cap(caps, usb_redir_cap_64bits_ids);
- usbredirparser_init(dev->parser, version, caps, USB_REDIR_CAPS_SIZE, 0);
+
+ if (runstate_check(RUN_STATE_INMIGRATE)) {
+ flags |= usbredirparser_fl_no_hello;
+ }
+ usbredirparser_init(dev->parser, version, caps, USB_REDIR_CAPS_SIZE,
+ flags);
usbredirparser_do_write(dev->parser);
}
@@ -949,6 +960,11 @@ static int usbredir_chardev_can_read(void *opaque)
return 0;
}
+ /* Don't read new data from the chardev until our state is fully synced */
+ if (!runstate_check(RUN_STATE_RUNNING)) {
+ return 0;
+ }
+
/* usbredir_parser_do_read will consume *all* data we give it */
return 1024 * 1024;
}
@@ -1004,6 +1020,15 @@ static const QemuChrHandlers usbredir_chr_handlers = {
* init + destroy
*/
+static void usbredir_vm_state_change(void *priv, int running, RunState state)
+{
+ USBRedirDevice *dev = priv;
+
+ if (state == RUN_STATE_RUNNING && dev->parser != NULL) {
+ usbredirparser_do_write(dev->parser); /* Flush any pending writes */
+ }
+}
+
static int usbredir_initfn(USBDevice *udev)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
@@ -1041,6 +1066,7 @@ static int usbredir_initfn(USBDevice *udev)
qemu_chr_fe_open(dev->cs);
qemu_chr_add_handlers(dev->cs, &usbredir_chr_handlers, dev);
+ qemu_add_vm_change_state_handler(usbredir_vm_state_change, dev);
add_boot_device_path(dev->bootindex, &udev->qdev, NULL);
return 0;
}
@@ -1530,6 +1556,304 @@ static void usbredir_interrupt_packet(void *priv, uint64_t id,
}
}
+/*
+ * Migration code
+ */
+
+static void usbredir_pre_save(void *priv)
+{
+ USBRedirDevice *dev = priv;
+
+ usbredir_fill_already_in_flight(dev);
+}
+
+static int usbredir_post_load(void *priv, int version_id)
+{
+ USBRedirDevice *dev = priv;
+ struct USBEndpoint *usb_ep;
+ int i;
+
+ for (i = 0; i < MAX_ENDPOINTS; i++) {
+ usb_ep = usb_ep_get(&dev->dev,
+ (i & 0x10) ? USB_TOKEN_IN : USB_TOKEN_OUT,
+ i & 0x0f);
+ usb_ep->type = dev->endpoint[i].type;
+ usb_ep->ifnum = dev->endpoint[i].interface;
+ usb_ep->max_packet_size = dev->endpoint[i].max_packet_size;
+ if (dev->endpoint[i].type == usb_redir_type_bulk) {
+ usb_ep->pipeline = true;
+ }
+ }
+ return 0;
+}
+
+/* For usbredirparser migration */
+static void usbredir_put_parser(QEMUFile *f, void *priv, size_t unused)
+{
+ USBRedirDevice *dev = priv;
+ uint8_t *data;
+ int len;
+
+ if (dev->parser == NULL) {
+ qemu_put_be32(f, 0);
+ return;
+ }
+
+ usbredirparser_serialize(dev->parser, &data, &len);
+ qemu_oom_check(data);
+
+ qemu_put_be32(f, len);
+ qemu_put_buffer(f, data, len);
+
+ free(data);
+}
+
+static int usbredir_get_parser(QEMUFile *f, void *priv, size_t unused)
+{
+ USBRedirDevice *dev = priv;
+ uint8_t *data;
+ int len, ret;
+
+ len = qemu_get_be32(f);
+ if (len == 0) {
+ return 0;
+ }
+
+ /*
+ * Our chardev should be open already at this point, otherwise
+ * the usbredir channel will be broken (ie spice without seamless)
+ */
+ if (dev->parser == NULL) {
+ ERROR("get_parser called with closed chardev, failing migration\n");
+ return -1;
+ }
+
+ data = g_malloc(len);
+ qemu_get_buffer(f, data, len);
+
+ ret = usbredirparser_unserialize(dev->parser, data, len);
+
+ g_free(data);
+
+ return ret;
+}
+
+static const VMStateInfo usbredir_parser_vmstate_info = {
+ .name = "usb-redir-parser",
+ .put = usbredir_put_parser,
+ .get = usbredir_get_parser,
+};
+
+
+/* For buffered packets (iso/irq) queue migration */
+static void usbredir_put_bufpq(QEMUFile *f, void *priv, size_t unused)
+{
+ struct endp_data *endp = priv;
+ struct buf_packet *bufp;
+ int remain = endp->bufpq_size;
+
+ qemu_put_be32(f, endp->bufpq_size);
+ QTAILQ_FOREACH(bufp, &endp->bufpq, next) {
+ qemu_put_be32(f, bufp->len);
+ qemu_put_be32(f, bufp->status);
+ qemu_put_buffer(f, bufp->data, bufp->len);
+ remain--;
+ }
+ assert(remain == 0);
+}
+
+static int usbredir_get_bufpq(QEMUFile *f, void *priv, size_t unused)
+{
+ struct endp_data *endp = priv;
+ struct buf_packet *bufp;
+ int i;
+
+ endp->bufpq_size = qemu_get_be32(f);
+ for (i = 0; i < endp->bufpq_size; i++) {
+ bufp = g_malloc(sizeof(struct buf_packet));
+ bufp->len = qemu_get_be32(f);
+ bufp->status = qemu_get_be32(f);
+ bufp->data = qemu_oom_check(malloc(bufp->len)); /* regular malloc! */
+ qemu_get_buffer(f, bufp->data, bufp->len);
+ QTAILQ_INSERT_TAIL(&endp->bufpq, bufp, next);
+ }
+ return 0;
+}
+
+static const VMStateInfo usbredir_ep_bufpq_vmstate_info = {
+ .name = "usb-redir-bufpq",
+ .put = usbredir_put_bufpq,
+ .get = usbredir_get_bufpq,
+};
+
+
+/* For endp_data migration */
+static const VMStateDescription usbredir_ep_vmstate = {
+ .name = "usb-redir-ep",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_UINT8(type, struct endp_data),
+ VMSTATE_UINT8(interval, struct endp_data),
+ VMSTATE_UINT8(interface, struct endp_data),
+ VMSTATE_UINT16(max_packet_size, struct endp_data),
+ VMSTATE_UINT8(iso_started, struct endp_data),
+ VMSTATE_UINT8(iso_error, struct endp_data),
+ VMSTATE_UINT8(interrupt_started, struct endp_data),
+ VMSTATE_UINT8(interrupt_error, struct endp_data),
+ VMSTATE_UINT8(bufpq_prefilled, struct endp_data),
+ VMSTATE_UINT8(bufpq_dropping_packets, struct endp_data),
+ {
+ .name = "bufpq",
+ .version_id = 0,
+ .field_exists = NULL,
+ .size = 0,
+ .info = &usbredir_ep_bufpq_vmstate_info,
+ .flags = VMS_SINGLE,
+ .offset = 0,
+ },
+ VMSTATE_INT32(bufpq_target_size, struct endp_data),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+/* For PacketIdQueue migration */
+static void usbredir_put_packet_id_q(QEMUFile *f, void *priv, size_t unused)
+{
+ struct PacketIdQueue *q = priv;
+ USBRedirDevice *dev = q->dev;
+ struct PacketIdQueueEntry *e;
+ int remain = q->size;
+
+ DPRINTF("put_packet_id_q %s size %d\n", q->name, q->size);
+ qemu_put_be32(f, q->size);
+ QTAILQ_FOREACH(e, &q->head, next) {
+ qemu_put_be64(f, e->id);
+ remain--;
+ }
+ assert(remain == 0);
+}
+
+static int usbredir_get_packet_id_q(QEMUFile *f, void *priv, size_t unused)
+{
+ struct PacketIdQueue *q = priv;
+ USBRedirDevice *dev = q->dev;
+ int i, size;
+ uint64_t id;
+
+ size = qemu_get_be32(f);
+ DPRINTF("get_packet_id_q %s size %d\n", q->name, size);
+ for (i = 0; i < size; i++) {
+ id = qemu_get_be64(f);
+ packet_id_queue_add(q, id);
+ }
+ assert(q->size == size);
+ return 0;
+}
+
+static const VMStateInfo usbredir_ep_packet_id_q_vmstate_info = {
+ .name = "usb-redir-packet-id-q",
+ .put = usbredir_put_packet_id_q,
+ .get = usbredir_get_packet_id_q,
+};
+
+static const VMStateDescription usbredir_ep_packet_id_queue_vmstate = {
+ .name = "usb-redir-packet-id-queue",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField []) {
+ {
+ .name = "queue",
+ .version_id = 0,
+ .field_exists = NULL,
+ .size = 0,
+ .info = &usbredir_ep_packet_id_q_vmstate_info,
+ .flags = VMS_SINGLE,
+ .offset = 0,
+ },
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+/* For usb_redir_device_connect_header migration */
+static const VMStateDescription usbredir_device_info_vmstate = {
+ .name = "usb-redir-device-info",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_UINT8(speed, struct usb_redir_device_connect_header),
+ VMSTATE_UINT8(device_class, struct usb_redir_device_connect_header),
+ VMSTATE_UINT8(device_subclass, struct usb_redir_device_connect_header),
+ VMSTATE_UINT8(device_protocol, struct usb_redir_device_connect_header),
+ VMSTATE_UINT16(vendor_id, struct usb_redir_device_connect_header),
+ VMSTATE_UINT16(product_id, struct usb_redir_device_connect_header),
+ VMSTATE_UINT16(device_version_bcd,
+ struct usb_redir_device_connect_header),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+/* For usb_redir_interface_info_header migration */
+static const VMStateDescription usbredir_interface_info_vmstate = {
+ .name = "usb-redir-interface-info",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_UINT32(interface_count,
+ struct usb_redir_interface_info_header),
+ VMSTATE_UINT8_ARRAY(interface,
+ struct usb_redir_interface_info_header, 32),
+ VMSTATE_UINT8_ARRAY(interface_class,
+ struct usb_redir_interface_info_header, 32),
+ VMSTATE_UINT8_ARRAY(interface_subclass,
+ struct usb_redir_interface_info_header, 32),
+ VMSTATE_UINT8_ARRAY(interface_protocol,
+ struct usb_redir_interface_info_header, 32),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+/* And finally the USBRedirDevice vmstate itself */
+static const VMStateDescription usbredir_vmstate = {
+ .name = "usb-redir",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .pre_save = usbredir_pre_save,
+ .post_load = usbredir_post_load,
+ .fields = (VMStateField []) {
+ VMSTATE_USB_DEVICE(dev, USBRedirDevice),
+ VMSTATE_TIMER(attach_timer, USBRedirDevice),
+ {
+ .name = "parser",
+ .version_id = 0,
+ .field_exists = NULL,
+ .size = 0,
+ .info = &usbredir_parser_vmstate_info,
+ .flags = VMS_SINGLE,
+ .offset = 0,
+ },
+ VMSTATE_STRUCT_ARRAY(endpoint, USBRedirDevice, MAX_ENDPOINTS, 1,
+ usbredir_ep_vmstate, struct endp_data),
+ VMSTATE_STRUCT(cancelled, USBRedirDevice, 1,
+ usbredir_ep_packet_id_queue_vmstate,
+ struct PacketIdQueue),
+ VMSTATE_STRUCT(already_in_flight, USBRedirDevice, 1,
+ usbredir_ep_packet_id_queue_vmstate,
+ struct PacketIdQueue),
+ VMSTATE_STRUCT(device_info, USBRedirDevice, 1,
+ usbredir_device_info_vmstate,
+ struct usb_redir_device_connect_header),
+ VMSTATE_STRUCT(interface_info, USBRedirDevice, 1,
+ usbredir_interface_info_vmstate,
+ struct usb_redir_interface_info_header),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static Property usbredir_properties[] = {
DEFINE_PROP_CHR("chardev", USBRedirDevice, cs),
DEFINE_PROP_UINT8("debug", USBRedirDevice, debug, 0),
@@ -1550,6 +1874,7 @@ static void usbredir_class_initfn(ObjectClass *klass, void *data)
uc->handle_reset = usbredir_handle_reset;
uc->handle_data = usbredir_handle_data;
uc->handle_control = usbredir_handle_control;
+ dc->vmsd = &usbredir_vmstate;
dc->props = usbredir_properties;
}
--
1.7.12