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qemu/usb-redir.c
Hans de Goede c1b71a1df6 usb-redir: Don't try to write to the chardev after a close event 
Since we handle close async in a bh, do_write and thus write can get
called after receiving a close event. This patch adds a check to
the usb-redir write callback to not call qemu_chr_fe_write on a closed
backend.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-11-28 16:20:51 -06:00

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/*
* USB redirector usb-guest
*
* Copyright (c) 2011 Red Hat, Inc.
*
* Red Hat Authors:
* Hans de Goede <hdegoede@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "qemu-timer.h"
#include "monitor.h"
#include "sysemu.h"
#include <dirent.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <usbredirparser.h>
#include "hw/usb.h"
#define MAX_ENDPOINTS 32
#define EP2I(ep_address) (((ep_address & 0x80) >> 3) | (ep_address & 0x0f))
#define I2EP(i) (((i & 0x10) << 3) | (i & 0x0f))
typedef struct AsyncURB AsyncURB;
typedef struct USBRedirDevice USBRedirDevice;
/* Struct to hold buffered packets (iso or int input packets) */
struct buf_packet {
uint8_t *data;
int len;
int status;
QTAILQ_ENTRY(buf_packet)next;
};
struct endp_data {
uint8_t type;
uint8_t interval;
uint8_t interface; /* bInterfaceNumber this ep belongs to */
uint8_t iso_started;
uint8_t iso_error; /* For reporting iso errors to the HC */
uint8_t interrupt_started;
uint8_t interrupt_error;
QTAILQ_HEAD(, buf_packet) bufpq;
};
struct USBRedirDevice {
USBDevice dev;
/* Properties */
CharDriverState *cs;
uint8_t debug;
/* Data passed from chardev the fd_read cb to the usbredirparser read cb */
const uint8_t *read_buf;
int read_buf_size;
/* For async handling of open/close */
QEMUBH *open_close_bh;
/* To delay the usb attach in case of quick chardev close + open */
QEMUTimer *attach_timer;
int64_t next_attach_time;
struct usbredirparser *parser;
struct endp_data endpoint[MAX_ENDPOINTS];
uint32_t packet_id;
QTAILQ_HEAD(, AsyncURB) asyncq;
};
struct AsyncURB {
USBRedirDevice *dev;
USBPacket *packet;
uint32_t packet_id;
int get;
union {
struct usb_redir_control_packet_header control_packet;
struct usb_redir_bulk_packet_header bulk_packet;
struct usb_redir_interrupt_packet_header interrupt_packet;
};
QTAILQ_ENTRY(AsyncURB)next;
};
static void usbredir_device_connect(void *priv,
struct usb_redir_device_connect_header *device_connect);
static void usbredir_device_disconnect(void *priv);
static void usbredir_interface_info(void *priv,
struct usb_redir_interface_info_header *interface_info);
static void usbredir_ep_info(void *priv,
struct usb_redir_ep_info_header *ep_info);
static void usbredir_configuration_status(void *priv, uint32_t id,
struct usb_redir_configuration_status_header *configuration_status);
static void usbredir_alt_setting_status(void *priv, uint32_t id,
struct usb_redir_alt_setting_status_header *alt_setting_status);
static void usbredir_iso_stream_status(void *priv, uint32_t id,
struct usb_redir_iso_stream_status_header *iso_stream_status);
static void usbredir_interrupt_receiving_status(void *priv, uint32_t id,
struct usb_redir_interrupt_receiving_status_header
*interrupt_receiving_status);
static void usbredir_bulk_streams_status(void *priv, uint32_t id,
struct usb_redir_bulk_streams_status_header *bulk_streams_status);
static void usbredir_control_packet(void *priv, uint32_t id,
struct usb_redir_control_packet_header *control_packet,
uint8_t *data, int data_len);
static void usbredir_bulk_packet(void *priv, uint32_t id,
struct usb_redir_bulk_packet_header *bulk_packet,
uint8_t *data, int data_len);
static void usbredir_iso_packet(void *priv, uint32_t id,
struct usb_redir_iso_packet_header *iso_packet,
uint8_t *data, int data_len);
static void usbredir_interrupt_packet(void *priv, uint32_t id,
struct usb_redir_interrupt_packet_header *interrupt_header,
uint8_t *data, int data_len);
static int usbredir_handle_status(USBRedirDevice *dev,
int status, int actual_len);
#define VERSION "qemu usb-redir guest " QEMU_VERSION
/*
* Logging stuff
*/
#define ERROR(...) \
do { \
if (dev->debug >= usbredirparser_error) { \
error_report("usb-redir error: " __VA_ARGS__); \
} \
} while (0)
#define WARNING(...) \
do { \
if (dev->debug >= usbredirparser_warning) { \
error_report("usb-redir warning: " __VA_ARGS__); \
} \
} while (0)
#define INFO(...) \
do { \
if (dev->debug >= usbredirparser_info) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
#define DPRINTF(...) \
do { \
if (dev->debug >= usbredirparser_debug) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
#define DPRINTF2(...) \
do { \
if (dev->debug >= usbredirparser_debug_data) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
static void usbredir_log(void *priv, int level, const char *msg)
{
USBRedirDevice *dev = priv;
if (dev->debug < level) {
return;
}
error_report("%s\n", msg);
}
static void usbredir_log_data(USBRedirDevice *dev, const char *desc,
const uint8_t *data, int len)
{
int i, j, n;
if (dev->debug < usbredirparser_debug_data) {
return;
}
for (i = 0; i < len; i += j) {
char buf[128];
n = sprintf(buf, "%s", desc);
for (j = 0; j < 8 && i + j < len; j++) {
n += sprintf(buf + n, " %02X", data[i + j]);
}
error_report("%s\n", buf);
}
}
/*
* usbredirparser io functions
*/
static int usbredir_read(void *priv, uint8_t *data, int count)
{
USBRedirDevice *dev = priv;
if (dev->read_buf_size < count) {
count = dev->read_buf_size;
}
memcpy(data, dev->read_buf, count);
dev->read_buf_size -= count;
if (dev->read_buf_size) {
dev->read_buf += count;
} else {
dev->read_buf = NULL;
}
return count;
}
static int usbredir_write(void *priv, uint8_t *data, int count)
{
USBRedirDevice *dev = priv;
if (!dev->cs->opened) {
return 0;
}
return qemu_chr_fe_write(dev->cs, data, count);
}
/*
* Async and buffered packets helpers
*/
static AsyncURB *async_alloc(USBRedirDevice *dev, USBPacket *p)
{
AsyncURB *aurb = (AsyncURB *) g_malloc0(sizeof(AsyncURB));
aurb->dev = dev;
aurb->packet = p;
aurb->packet_id = dev->packet_id;
QTAILQ_INSERT_TAIL(&dev->asyncq, aurb, next);
dev->packet_id++;
return aurb;
}
static void async_free(USBRedirDevice *dev, AsyncURB *aurb)
{
QTAILQ_REMOVE(&dev->asyncq, aurb, next);
g_free(aurb);
}
static AsyncURB *async_find(USBRedirDevice *dev, uint32_t packet_id)
{
AsyncURB *aurb;
QTAILQ_FOREACH(aurb, &dev->asyncq, next) {
if (aurb->packet_id == packet_id) {
return aurb;
}
}
ERROR("could not find async urb for packet_id %u\n", packet_id);
return NULL;
}
static void usbredir_cancel_packet(USBDevice *udev, USBPacket *p)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
AsyncURB *aurb;
QTAILQ_FOREACH(aurb, &dev->asyncq, next) {
if (p != aurb->packet) {
continue;
}
DPRINTF("async cancel id %u\n", aurb->packet_id);
usbredirparser_send_cancel_data_packet(dev->parser, aurb->packet_id);
usbredirparser_do_write(dev->parser);
/* Mark it as dead */
aurb->packet = NULL;
break;
}
}
static struct buf_packet *bufp_alloc(USBRedirDevice *dev,
uint8_t *data, int len, int status, uint8_t ep)
{
struct buf_packet *bufp = g_malloc(sizeof(struct buf_packet));
bufp->data = data;
bufp->len = len;
bufp->status = status;
QTAILQ_INSERT_TAIL(&dev->endpoint[EP2I(ep)].bufpq, bufp, next);
return bufp;
}
static void bufp_free(USBRedirDevice *dev, struct buf_packet *bufp,
uint8_t ep)
{
QTAILQ_REMOVE(&dev->endpoint[EP2I(ep)].bufpq, bufp, next);
free(bufp->data);
g_free(bufp);
}
static void usbredir_free_bufpq(USBRedirDevice *dev, uint8_t ep)
{
struct buf_packet *buf, *buf_next;
QTAILQ_FOREACH_SAFE(buf, &dev->endpoint[EP2I(ep)].bufpq, next, buf_next) {
bufp_free(dev, buf, ep);
}
}
/*
* USBDevice callbacks
*/
static void usbredir_handle_reset(USBDevice *udev)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
DPRINTF("reset device\n");
usbredirparser_send_reset(dev->parser);
usbredirparser_do_write(dev->parser);
}
static int usbredir_handle_iso_data(USBRedirDevice *dev, USBPacket *p,
uint8_t ep)
{
int status, len;
if (!dev->endpoint[EP2I(ep)].iso_started &&
!dev->endpoint[EP2I(ep)].iso_error) {
struct usb_redir_start_iso_stream_header start_iso = {
.endpoint = ep,
/* TODO maybe do something with these depending on ep interval? */
.pkts_per_urb = 32,
.no_urbs = 3,
};
/* No id, we look at the ep when receiving a status back */
usbredirparser_send_start_iso_stream(dev->parser, 0, &start_iso);
usbredirparser_do_write(dev->parser);
DPRINTF("iso stream started ep %02X\n", ep);
dev->endpoint[EP2I(ep)].iso_started = 1;
}
if (ep & USB_DIR_IN) {
struct buf_packet *isop;
isop = QTAILQ_FIRST(&dev->endpoint[EP2I(ep)].bufpq);
if (isop == NULL) {
DPRINTF2("iso-token-in ep %02X, no isop\n", ep);
/* Check iso_error for stream errors, otherwise its an underrun */
status = dev->endpoint[EP2I(ep)].iso_error;
dev->endpoint[EP2I(ep)].iso_error = 0;
return usbredir_handle_status(dev, status, 0);
}
DPRINTF2("iso-token-in ep %02X status %d len %d\n", ep, isop->status,
isop->len);
status = isop->status;
if (status != usb_redir_success) {
bufp_free(dev, isop, ep);
return usbredir_handle_status(dev, status, 0);
}
len = isop->len;
if (len > p->iov.size) {
ERROR("received iso data is larger then packet ep %02X\n", ep);
bufp_free(dev, isop, ep);
return USB_RET_NAK;
}
usb_packet_copy(p, isop->data, len);
bufp_free(dev, isop, ep);
return len;
} else {
/* If the stream was not started because of a pending error don't
send the packet to the usb-host */
if (dev->endpoint[EP2I(ep)].iso_started) {
struct usb_redir_iso_packet_header iso_packet = {
.endpoint = ep,
.length = p->iov.size
};
uint8_t buf[p->iov.size];
/* No id, we look at the ep when receiving a status back */
usb_packet_copy(p, buf, p->iov.size);
usbredirparser_send_iso_packet(dev->parser, 0, &iso_packet,
buf, p->iov.size);
usbredirparser_do_write(dev->parser);
}
status = dev->endpoint[EP2I(ep)].iso_error;
dev->endpoint[EP2I(ep)].iso_error = 0;
DPRINTF2("iso-token-out ep %02X status %d len %zd\n", ep, status,
p->iov.size);
return usbredir_handle_status(dev, status, p->iov.size);
}
}
static void usbredir_stop_iso_stream(USBRedirDevice *dev, uint8_t ep)
{
struct usb_redir_stop_iso_stream_header stop_iso_stream = {
.endpoint = ep
};
if (dev->endpoint[EP2I(ep)].iso_started) {
usbredirparser_send_stop_iso_stream(dev->parser, 0, &stop_iso_stream);
DPRINTF("iso stream stopped ep %02X\n", ep);
dev->endpoint[EP2I(ep)].iso_started = 0;
}
usbredir_free_bufpq(dev, ep);
}
static int usbredir_handle_bulk_data(USBRedirDevice *dev, USBPacket *p,
uint8_t ep)
{
AsyncURB *aurb = async_alloc(dev, p);
struct usb_redir_bulk_packet_header bulk_packet;
DPRINTF("bulk-out ep %02X len %zd id %u\n", ep,
p->iov.size, aurb->packet_id);
bulk_packet.endpoint = ep;
bulk_packet.length = p->iov.size;
bulk_packet.stream_id = 0;
aurb->bulk_packet = bulk_packet;
if (ep & USB_DIR_IN) {
usbredirparser_send_bulk_packet(dev->parser, aurb->packet_id,
&bulk_packet, NULL, 0);
} else {
uint8_t buf[p->iov.size];
usb_packet_copy(p, buf, p->iov.size);
usbredir_log_data(dev, "bulk data out:", buf, p->iov.size);
usbredirparser_send_bulk_packet(dev->parser, aurb->packet_id,
&bulk_packet, buf, p->iov.size);
}
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_handle_interrupt_data(USBRedirDevice *dev,
USBPacket *p, uint8_t ep)
{
if (ep & USB_DIR_IN) {
/* Input interrupt endpoint, buffered packet input */
struct buf_packet *intp;
int status, len;
if (!dev->endpoint[EP2I(ep)].interrupt_started &&
!dev->endpoint[EP2I(ep)].interrupt_error) {
struct usb_redir_start_interrupt_receiving_header start_int = {
.endpoint = ep,
};
/* No id, we look at the ep when receiving a status back */
usbredirparser_send_start_interrupt_receiving(dev->parser, 0,
&start_int);
usbredirparser_do_write(dev->parser);
DPRINTF("interrupt recv started ep %02X\n", ep);
dev->endpoint[EP2I(ep)].interrupt_started = 1;
}
intp = QTAILQ_FIRST(&dev->endpoint[EP2I(ep)].bufpq);
if (intp == NULL) {
DPRINTF2("interrupt-token-in ep %02X, no intp\n", ep);
/* Check interrupt_error for stream errors */
status = dev->endpoint[EP2I(ep)].interrupt_error;
dev->endpoint[EP2I(ep)].interrupt_error = 0;
return usbredir_handle_status(dev, status, 0);
}
DPRINTF("interrupt-token-in ep %02X status %d len %d\n", ep,
intp->status, intp->len);
status = intp->status;
if (status != usb_redir_success) {
bufp_free(dev, intp, ep);
return usbredir_handle_status(dev, status, 0);
}
len = intp->len;
if (len > p->iov.size) {
ERROR("received int data is larger then packet ep %02X\n", ep);
bufp_free(dev, intp, ep);
return USB_RET_NAK;
}
usb_packet_copy(p, intp->data, len);
bufp_free(dev, intp, ep);
return len;
} else {
/* Output interrupt endpoint, normal async operation */
AsyncURB *aurb = async_alloc(dev, p);
struct usb_redir_interrupt_packet_header interrupt_packet;
uint8_t buf[p->iov.size];
DPRINTF("interrupt-out ep %02X len %zd id %u\n", ep, p->iov.size,
aurb->packet_id);
interrupt_packet.endpoint = ep;
interrupt_packet.length = p->iov.size;
aurb->interrupt_packet = interrupt_packet;
usb_packet_copy(p, buf, p->iov.size);
usbredir_log_data(dev, "interrupt data out:", buf, p->iov.size);
usbredirparser_send_interrupt_packet(dev->parser, aurb->packet_id,
&interrupt_packet, buf, p->iov.size);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
}
static void usbredir_stop_interrupt_receiving(USBRedirDevice *dev,
uint8_t ep)
{
struct usb_redir_stop_interrupt_receiving_header stop_interrupt_recv = {
.endpoint = ep
};
if (dev->endpoint[EP2I(ep)].interrupt_started) {
usbredirparser_send_stop_interrupt_receiving(dev->parser, 0,
&stop_interrupt_recv);
DPRINTF("interrupt recv stopped ep %02X\n", ep);
dev->endpoint[EP2I(ep)].interrupt_started = 0;
}
usbredir_free_bufpq(dev, ep);
}
static int usbredir_handle_data(USBDevice *udev, USBPacket *p)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
uint8_t ep;
ep = p->devep;
if (p->pid == USB_TOKEN_IN) {
ep |= USB_DIR_IN;
}
switch (dev->endpoint[EP2I(ep)].type) {
case USB_ENDPOINT_XFER_CONTROL:
ERROR("handle_data called for control transfer on ep %02X\n", ep);
return USB_RET_NAK;
case USB_ENDPOINT_XFER_ISOC:
return usbredir_handle_iso_data(dev, p, ep);
case USB_ENDPOINT_XFER_BULK:
return usbredir_handle_bulk_data(dev, p, ep);;
case USB_ENDPOINT_XFER_INT:
return usbredir_handle_interrupt_data(dev, p, ep);;
default:
ERROR("handle_data ep %02X has unknown type %d\n", ep,
dev->endpoint[EP2I(ep)].type);
return USB_RET_NAK;
}
}
static int usbredir_set_config(USBRedirDevice *dev, USBPacket *p,
int config)
{
struct usb_redir_set_configuration_header set_config;
AsyncURB *aurb = async_alloc(dev, p);
int i;
DPRINTF("set config %d id %u\n", config, aurb->packet_id);
for (i = 0; i < MAX_ENDPOINTS; i++) {
switch (dev->endpoint[i].type) {
case USB_ENDPOINT_XFER_ISOC:
usbredir_stop_iso_stream(dev, I2EP(i));
break;
case USB_ENDPOINT_XFER_INT:
if (i & 0x10) {
usbredir_stop_interrupt_receiving(dev, I2EP(i));
}
break;
}
usbredir_free_bufpq(dev, I2EP(i));
}
set_config.configuration = config;
usbredirparser_send_set_configuration(dev->parser, aurb->packet_id,
&set_config);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_get_config(USBRedirDevice *dev, USBPacket *p)
{
AsyncURB *aurb = async_alloc(dev, p);
DPRINTF("get config id %u\n", aurb->packet_id);
aurb->get = 1;
usbredirparser_send_get_configuration(dev->parser, aurb->packet_id);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_set_interface(USBRedirDevice *dev, USBPacket *p,
int interface, int alt)
{
struct usb_redir_set_alt_setting_header set_alt;
AsyncURB *aurb = async_alloc(dev, p);
int i;
DPRINTF("set interface %d alt %d id %u\n", interface, alt,
aurb->packet_id);
for (i = 0; i < MAX_ENDPOINTS; i++) {
if (dev->endpoint[i].interface == interface) {
switch (dev->endpoint[i].type) {
case USB_ENDPOINT_XFER_ISOC:
usbredir_stop_iso_stream(dev, I2EP(i));
break;
case USB_ENDPOINT_XFER_INT:
if (i & 0x10) {
usbredir_stop_interrupt_receiving(dev, I2EP(i));
}
break;
}
usbredir_free_bufpq(dev, I2EP(i));
}
}
set_alt.interface = interface;
set_alt.alt = alt;
usbredirparser_send_set_alt_setting(dev->parser, aurb->packet_id,
&set_alt);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_get_interface(USBRedirDevice *dev, USBPacket *p,
int interface)
{
struct usb_redir_get_alt_setting_header get_alt;
AsyncURB *aurb = async_alloc(dev, p);
DPRINTF("get interface %d id %u\n", interface, aurb->packet_id);
get_alt.interface = interface;
aurb->get = 1;
usbredirparser_send_get_alt_setting(dev->parser, aurb->packet_id,
&get_alt);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_handle_control(USBDevice *udev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
struct usb_redir_control_packet_header control_packet;
AsyncURB *aurb;
/* Special cases for certain standard device requests */
switch (request) {
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
DPRINTF("set address %d\n", value);
dev->dev.addr = value;
return 0;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
return usbredir_set_config(dev, p, value & 0xff);
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
return usbredir_get_config(dev, p);
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
return usbredir_set_interface(dev, p, index, value);
case InterfaceRequest | USB_REQ_GET_INTERFACE:
return usbredir_get_interface(dev, p, index);
}
/* "Normal" ctrl requests */
aurb = async_alloc(dev, p);
/* Note request is (bRequestType << 8) | bRequest */
DPRINTF("ctrl-out type 0x%x req 0x%x val 0x%x index %d len %d id %u\n",
request >> 8, request & 0xff, value, index, length,
aurb->packet_id);
control_packet.request = request & 0xFF;
control_packet.requesttype = request >> 8;
control_packet.endpoint = control_packet.requesttype & USB_DIR_IN;
control_packet.value = value;
control_packet.index = index;
control_packet.length = length;
aurb->control_packet = control_packet;
if (control_packet.requesttype & USB_DIR_IN) {
usbredirparser_send_control_packet(dev->parser, aurb->packet_id,
&control_packet, NULL, 0);
} else {
usbredir_log_data(dev, "ctrl data out:", data, length);
usbredirparser_send_control_packet(dev->parser, aurb->packet_id,
&control_packet, data, length);
}
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
/*
* Close events can be triggered by usbredirparser_do_write which gets called
* from within the USBDevice data / control packet callbacks and doing a
* usb_detach from within these callbacks is not a good idea.
*
* So we use a bh handler to take care of close events. We also handle
* open events from this callback to make sure that a close directly followed
* by an open gets handled in the right order.
*/
static void usbredir_open_close_bh(void *opaque)
{
USBRedirDevice *dev = opaque;
usbredir_device_disconnect(dev);
if (dev->parser) {
usbredirparser_destroy(dev->parser);
dev->parser = NULL;
}
if (dev->cs->opened) {
dev->parser = qemu_oom_check(usbredirparser_create());
dev->parser->priv = dev;
dev->parser->log_func = usbredir_log;
dev->parser->read_func = usbredir_read;
dev->parser->write_func = usbredir_write;
dev->parser->device_connect_func = usbredir_device_connect;
dev->parser->device_disconnect_func = usbredir_device_disconnect;
dev->parser->interface_info_func = usbredir_interface_info;
dev->parser->ep_info_func = usbredir_ep_info;
dev->parser->configuration_status_func = usbredir_configuration_status;
dev->parser->alt_setting_status_func = usbredir_alt_setting_status;
dev->parser->iso_stream_status_func = usbredir_iso_stream_status;
dev->parser->interrupt_receiving_status_func =
usbredir_interrupt_receiving_status;
dev->parser->bulk_streams_status_func = usbredir_bulk_streams_status;
dev->parser->control_packet_func = usbredir_control_packet;
dev->parser->bulk_packet_func = usbredir_bulk_packet;
dev->parser->iso_packet_func = usbredir_iso_packet;
dev->parser->interrupt_packet_func = usbredir_interrupt_packet;
dev->read_buf = NULL;
dev->read_buf_size = 0;
usbredirparser_init(dev->parser, VERSION, NULL, 0, 0);
usbredirparser_do_write(dev->parser);
}
}
static void usbredir_do_attach(void *opaque)
{
USBRedirDevice *dev = opaque;
usb_device_attach(&dev->dev);
}
/*
* chardev callbacks
*/
static int usbredir_chardev_can_read(void *opaque)
{
USBRedirDevice *dev = opaque;
if (dev->parser) {
/* usbredir_parser_do_read will consume *all* data we give it */
return 1024 * 1024;
} else {
/* usbredir_open_close_bh hasn't handled the open event yet */
return 0;
}
}
static void usbredir_chardev_read(void *opaque, const uint8_t *buf, int size)
{
USBRedirDevice *dev = opaque;
/* No recursion allowed! */
assert(dev->read_buf == NULL);
dev->read_buf = buf;
dev->read_buf_size = size;
usbredirparser_do_read(dev->parser);
/* Send any acks, etc. which may be queued now */
usbredirparser_do_write(dev->parser);
}
static void usbredir_chardev_event(void *opaque, int event)
{
USBRedirDevice *dev = opaque;
switch (event) {
case CHR_EVENT_OPENED:
case CHR_EVENT_CLOSED:
qemu_bh_schedule(dev->open_close_bh);
break;
}
}
/*
* init + destroy
*/
static int usbredir_initfn(USBDevice *udev)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
int i;
if (dev->cs == NULL) {
qerror_report(QERR_MISSING_PARAMETER, "chardev");
return -1;
}
dev->open_close_bh = qemu_bh_new(usbredir_open_close_bh, dev);
dev->attach_timer = qemu_new_timer_ms(vm_clock, usbredir_do_attach, dev);
QTAILQ_INIT(&dev->asyncq);
for (i = 0; i < MAX_ENDPOINTS; i++) {
QTAILQ_INIT(&dev->endpoint[i].bufpq);
}
/* We'll do the attach once we receive the speed from the usb-host */
udev->auto_attach = 0;
/* Let the backend know we are ready */
qemu_chr_fe_open(dev->cs);
qemu_chr_add_handlers(dev->cs, usbredir_chardev_can_read,
usbredir_chardev_read, usbredir_chardev_event, dev);
return 0;
}
static void usbredir_cleanup_device_queues(USBRedirDevice *dev)
{
AsyncURB *aurb, *next_aurb;
int i;
QTAILQ_FOREACH_SAFE(aurb, &dev->asyncq, next, next_aurb) {
async_free(dev, aurb);
}
for (i = 0; i < MAX_ENDPOINTS; i++) {
usbredir_free_bufpq(dev, I2EP(i));
}
}
static void usbredir_handle_destroy(USBDevice *udev)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
qemu_chr_fe_close(dev->cs);
qemu_chr_delete(dev->cs);
/* Note must be done after qemu_chr_close, as that causes a close event */
qemu_bh_delete(dev->open_close_bh);
qemu_del_timer(dev->attach_timer);
qemu_free_timer(dev->attach_timer);
usbredir_cleanup_device_queues(dev);
if (dev->parser) {
usbredirparser_destroy(dev->parser);
}
}
/*
* usbredirparser packet complete callbacks
*/
static int usbredir_handle_status(USBRedirDevice *dev,
int status, int actual_len)
{
switch (status) {
case usb_redir_success:
return actual_len;
case usb_redir_stall:
return USB_RET_STALL;
case usb_redir_cancelled:
WARNING("returning cancelled packet to HC?\n");
case usb_redir_inval:
case usb_redir_ioerror:
case usb_redir_timeout:
default:
return USB_RET_NAK;
}
}
static void usbredir_device_connect(void *priv,
struct usb_redir_device_connect_header *device_connect)
{
USBRedirDevice *dev = priv;
if (qemu_timer_pending(dev->attach_timer) || dev->dev.attached) {
ERROR("Received device connect while already connected\n");
return;
}
switch (device_connect->speed) {
case usb_redir_speed_low:
DPRINTF("attaching low speed device\n");
dev->dev.speed = USB_SPEED_LOW;
break;
case usb_redir_speed_full:
DPRINTF("attaching full speed device\n");
dev->dev.speed = USB_SPEED_FULL;
break;
case usb_redir_speed_high:
DPRINTF("attaching high speed device\n");
dev->dev.speed = USB_SPEED_HIGH;
break;
case usb_redir_speed_super:
DPRINTF("attaching super speed device\n");
dev->dev.speed = USB_SPEED_SUPER;
break;
default:
DPRINTF("attaching unknown speed device, assuming full speed\n");
dev->dev.speed = USB_SPEED_FULL;
}
dev->dev.speedmask = (1 << dev->dev.speed);
qemu_mod_timer(dev->attach_timer, dev->next_attach_time);
}
static void usbredir_device_disconnect(void *priv)
{
USBRedirDevice *dev = priv;
int i;
/* Stop any pending attaches */
qemu_del_timer(dev->attach_timer);
if (dev->dev.attached) {
usb_device_detach(&dev->dev);
/*
* Delay next usb device attach to give the guest a chance to see
* see the detach / attach in case of quick close / open succession
*/
dev->next_attach_time = qemu_get_clock_ms(vm_clock) + 200;
}
/* Reset state so that the next dev connected starts with a clean slate */
usbredir_cleanup_device_queues(dev);
memset(dev->endpoint, 0, sizeof(dev->endpoint));
for (i = 0; i < MAX_ENDPOINTS; i++) {
QTAILQ_INIT(&dev->endpoint[i].bufpq);
}
}
static void usbredir_interface_info(void *priv,
struct usb_redir_interface_info_header *interface_info)
{
/* The intention is to allow specifying acceptable interface classes
for redirection on the cmdline and in the future verify this here,
and disconnect (or never connect) the device if a not accepted
interface class is detected */
}
static void usbredir_ep_info(void *priv,
struct usb_redir_ep_info_header *ep_info)
{
USBRedirDevice *dev = priv;
int i;
for (i = 0; i < MAX_ENDPOINTS; i++) {
dev->endpoint[i].type = ep_info->type[i];
dev->endpoint[i].interval = ep_info->interval[i];
dev->endpoint[i].interface = ep_info->interface[i];
if (dev->endpoint[i].type != usb_redir_type_invalid) {
DPRINTF("ep: %02X type: %d interface: %d\n", I2EP(i),
dev->endpoint[i].type, dev->endpoint[i].interface);
}
}
}
static void usbredir_configuration_status(void *priv, uint32_t id,
struct usb_redir_configuration_status_header *config_status)
{
USBRedirDevice *dev = priv;
AsyncURB *aurb;
int len = 0;
DPRINTF("set config status %d config %d id %u\n", config_status->status,
config_status->configuration, id);
aurb = async_find(dev, id);
if (!aurb) {
return;
}
if (aurb->packet) {
if (aurb->get) {
dev->dev.data_buf[0] = config_status->configuration;
len = 1;
}
aurb->packet->result =
usbredir_handle_status(dev, config_status->status, len);
usb_generic_async_ctrl_complete(&dev->dev, aurb->packet);
}
async_free(dev, aurb);
}
static void usbredir_alt_setting_status(void *priv, uint32_t id,
struct usb_redir_alt_setting_status_header *alt_setting_status)
{
USBRedirDevice *dev = priv;
AsyncURB *aurb;
int len = 0;
DPRINTF("alt status %d intf %d alt %d id: %u\n",
alt_setting_status->status,
alt_setting_status->interface,
alt_setting_status->alt, id);
aurb = async_find(dev, id);
if (!aurb) {
return;
}
if (aurb->packet) {
if (aurb->get) {
dev->dev.data_buf[0] = alt_setting_status->alt;
len = 1;
}
aurb->packet->result =
usbredir_handle_status(dev, alt_setting_status->status, len);
usb_generic_async_ctrl_complete(&dev->dev, aurb->packet);
}
async_free(dev, aurb);
}
static void usbredir_iso_stream_status(void *priv, uint32_t id,
struct usb_redir_iso_stream_status_header *iso_stream_status)
{
USBRedirDevice *dev = priv;
uint8_t ep = iso_stream_status->endpoint;
DPRINTF("iso status %d ep %02X id %u\n", iso_stream_status->status,
ep, id);
if (!dev->dev.attached) {
return;
}
dev->endpoint[EP2I(ep)].iso_error = iso_stream_status->status;
if (iso_stream_status->status == usb_redir_stall) {
DPRINTF("iso stream stopped by peer ep %02X\n", ep);
dev->endpoint[EP2I(ep)].iso_started = 0;
}
}
static void usbredir_interrupt_receiving_status(void *priv, uint32_t id,
struct usb_redir_interrupt_receiving_status_header
*interrupt_receiving_status)
{
USBRedirDevice *dev = priv;
uint8_t ep = interrupt_receiving_status->endpoint;
DPRINTF("interrupt recv status %d ep %02X id %u\n",
interrupt_receiving_status->status, ep, id);
if (!dev->dev.attached) {
return;
}
dev->endpoint[EP2I(ep)].interrupt_error =
interrupt_receiving_status->status;
if (interrupt_receiving_status->status == usb_redir_stall) {
DPRINTF("interrupt receiving stopped by peer ep %02X\n", ep);
dev->endpoint[EP2I(ep)].interrupt_started = 0;
}
}
static void usbredir_bulk_streams_status(void *priv, uint32_t id,
struct usb_redir_bulk_streams_status_header *bulk_streams_status)
{
}
static void usbredir_control_packet(void *priv, uint32_t id,
struct usb_redir_control_packet_header *control_packet,
uint8_t *data, int data_len)
{
USBRedirDevice *dev = priv;
int len = control_packet->length;
AsyncURB *aurb;
DPRINTF("ctrl-in status %d len %d id %u\n", control_packet->status,
len, id);
aurb = async_find(dev, id);
if (!aurb) {
free(data);
return;
}
aurb->control_packet.status = control_packet->status;
aurb->control_packet.length = control_packet->length;
if (memcmp(&aurb->control_packet, control_packet,
sizeof(*control_packet))) {
ERROR("return control packet mismatch, please report this!\n");
len = USB_RET_NAK;
}
if (aurb->packet) {
len = usbredir_handle_status(dev, control_packet->status, len);
if (len > 0) {
usbredir_log_data(dev, "ctrl data in:", data, data_len);
if (data_len <= sizeof(dev->dev.data_buf)) {
memcpy(dev->dev.data_buf, data, data_len);
} else {
ERROR("ctrl buffer too small (%d > %zu)\n",
data_len, sizeof(dev->dev.data_buf));
len = USB_RET_STALL;
}
}
aurb->packet->result = len;
usb_generic_async_ctrl_complete(&dev->dev, aurb->packet);
}
async_free(dev, aurb);
free(data);
}
static void usbredir_bulk_packet(void *priv, uint32_t id,
struct usb_redir_bulk_packet_header *bulk_packet,
uint8_t *data, int data_len)
{
USBRedirDevice *dev = priv;
uint8_t ep = bulk_packet->endpoint;
int len = bulk_packet->length;
AsyncURB *aurb;
DPRINTF("bulk-in status %d ep %02X len %d id %u\n", bulk_packet->status,
ep, len, id);
aurb = async_find(dev, id);
if (!aurb) {
free(data);
return;
}
if (aurb->bulk_packet.endpoint != bulk_packet->endpoint ||
aurb->bulk_packet.stream_id != bulk_packet->stream_id) {
ERROR("return bulk packet mismatch, please report this!\n");
len = USB_RET_NAK;
}
if (aurb->packet) {
len = usbredir_handle_status(dev, bulk_packet->status, len);
if (len > 0) {
usbredir_log_data(dev, "bulk data in:", data, data_len);
if (data_len <= aurb->packet->iov.size) {
usb_packet_copy(aurb->packet, data, data_len);
} else {
ERROR("bulk buffer too small (%d > %zd)\n", data_len,
aurb->packet->iov.size);
len = USB_RET_STALL;
}
}
aurb->packet->result = len;
usb_packet_complete(&dev->dev, aurb->packet);
}
async_free(dev, aurb);
free(data);
}
static void usbredir_iso_packet(void *priv, uint32_t id,
struct usb_redir_iso_packet_header *iso_packet,
uint8_t *data, int data_len)
{
USBRedirDevice *dev = priv;
uint8_t ep = iso_packet->endpoint;
DPRINTF2("iso-in status %d ep %02X len %d id %u\n", iso_packet->status, ep,
data_len, id);
if (dev->endpoint[EP2I(ep)].type != USB_ENDPOINT_XFER_ISOC) {
ERROR("received iso packet for non iso endpoint %02X\n", ep);
free(data);
return;
}
if (dev->endpoint[EP2I(ep)].iso_started == 0) {
DPRINTF("received iso packet for non started stream ep %02X\n", ep);
free(data);
return;
}
/* bufp_alloc also adds the packet to the ep queue */
bufp_alloc(dev, data, data_len, iso_packet->status, ep);
}
static void usbredir_interrupt_packet(void *priv, uint32_t id,
struct usb_redir_interrupt_packet_header *interrupt_packet,
uint8_t *data, int data_len)
{
USBRedirDevice *dev = priv;
uint8_t ep = interrupt_packet->endpoint;
DPRINTF("interrupt-in status %d ep %02X len %d id %u\n",
interrupt_packet->status, ep, data_len, id);
if (dev->endpoint[EP2I(ep)].type != USB_ENDPOINT_XFER_INT) {
ERROR("received int packet for non interrupt endpoint %02X\n", ep);
free(data);
return;
}
if (ep & USB_DIR_IN) {
if (dev->endpoint[EP2I(ep)].interrupt_started == 0) {
DPRINTF("received int packet while not started ep %02X\n", ep);
free(data);
return;
}
/* bufp_alloc also adds the packet to the ep queue */
bufp_alloc(dev, data, data_len, interrupt_packet->status, ep);
} else {
int len = interrupt_packet->length;
AsyncURB *aurb = async_find(dev, id);
if (!aurb) {
return;
}
if (aurb->interrupt_packet.endpoint != interrupt_packet->endpoint) {
ERROR("return int packet mismatch, please report this!\n");
len = USB_RET_NAK;
}
if (aurb->packet) {
aurb->packet->result = usbredir_handle_status(dev,
interrupt_packet->status, len);
usb_packet_complete(&dev->dev, aurb->packet);
}
async_free(dev, aurb);
}
}
static struct USBDeviceInfo usbredir_dev_info = {
.product_desc = "USB Redirection Device",
.qdev.name = "usb-redir",
.qdev.size = sizeof(USBRedirDevice),
.init = usbredir_initfn,
.handle_destroy = usbredir_handle_destroy,
.handle_packet = usb_generic_handle_packet,
.cancel_packet = usbredir_cancel_packet,
.handle_reset = usbredir_handle_reset,
.handle_data = usbredir_handle_data,
.handle_control = usbredir_handle_control,
.qdev.props = (Property[]) {
DEFINE_PROP_CHR("chardev", USBRedirDevice, cs),
DEFINE_PROP_UINT8("debug", USBRedirDevice, debug, 0),
DEFINE_PROP_END_OF_LIST(),
},
};
static void usbredir_register_devices(void)
{
usb_qdev_register(&usbredir_dev_info);
}
device_init(usbredir_register_devices);
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