Example #1
0
/* Sysfs entry to shutdown a virtual connection */
static int vhci_port_disconnect(__u32 rhport)
{
	struct vhci_device *vdev;

	usbip_dbg_vhci_sysfs("enter\n");

	/* lock */
	spin_lock(&the_controller->lock);

	vdev = port_to_vdev(rhport);

	spin_lock(&vdev->ud.lock);
	if (vdev->ud.status == VDEV_ST_NULL) {
		pr_err("not connected %d\n", vdev->ud.status);

		/* unlock */
		spin_unlock(&vdev->ud.lock);
		spin_unlock(&the_controller->lock);

		return -EINVAL;
	}

	/* unlock */
	spin_unlock(&vdev->ud.lock);
	spin_unlock(&the_controller->lock);

	usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);

	return 0;
}
Example #2
0
static ssize_t show_status(struct device *dev, struct device_attribute *attr,
		char *out)
{
	char *s = out;
	int i = 0;

	if (!the_controller || !out) {
		if(!the_controller) 
			err("'the_controller' is undefined");
		if(!out)
			err("'out' is undefined");

		//BUG();
		return -1;
	}

	spin_lock(&the_controller->lock);

	/*
	 * output example:
	 * prt sta bus dev socket           local_busid
	 * 000 004 000 000         c5a7bb80 1-2.3
	 * 001 004 000 000         d8cee980 2-3.4
	 *
	 * IP address can be retrieved from a socket pointer address by looking
	 * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
	 * port number and its peer IP address.
	 */
	out += sprintf(out, "prt sta spd bus dev socket           local_busid\n");

	for (i=0; i < VHCI_NPORTS; i++) {
		struct vhci_device *vdev = port_to_vdev(i);

		spin_lock(&vdev->ud.lock);

		out += sprintf(out, "%03u %03u ", i, vdev->ud.status);

		if (vdev->ud.status == VDEV_ST_USED) {
			out += sprintf(out, "%03u %03u %03u ",
					vdev->speed, vdev->busnum, vdev->devnum);
			out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
			out += sprintf(out, "%s", vdev->udev->dev.bus_id);

		} else
			out += sprintf(out, "000 000 000 0000000000000000 0-0");

		out += sprintf(out, "\n");

		spin_unlock(&vdev->ud.lock);
	}

	spin_unlock(&the_controller->lock);

	return out - s ;
}
Example #3
0
/* FIXME: ipv4 only code */
static int print_client_ip(struct device *dev,
			   struct device_attribute *attr,
			   char *out)
{
	int i;
	int ret;
	int size;
	__u32 ip;
	char *s = out;

	if (!the_controller || !out)
		BUG();

	spin_lock(&the_controller->lock);

	for (i=0; i < VHCI_NPORTS; i++) {
		struct socket *sock;
		struct sockaddr_in inaddr;
		struct vhci_device *vdev = port_to_vdev(i);

		spin_lock(&vdev->ud.lock);
		if( vdev->ud.status != VDEV_ST_USED ) {
			out += snprintf(out, 15, "%d -\n", i );
			spin_unlock(&vdev->ud.lock);
			continue;
		}

		sock = vdev->ud.tcp_socket;
		size = sizeof(struct sockaddr);
		ret = sock->ops->getname(sock,
				(struct sockaddr *)&inaddr,
				&size, 
				0);
		if( ! ret ) {
			spin_unlock(&vdev->ud.lock);
			spin_unlock(&the_controller->lock);
			return -ENODEV;
		}

		ip = ntohl(inaddr.sin_addr.s_addr);
		out += snprintf( out, 15, "%d %u\n", i, ip );
		spin_unlock(&vdev->ud.lock);
	}

	spin_unlock(&the_controller->lock);

	return out-s;
}
Example #4
0
/*
 * To start a new USB/IP attachment, a userland program needs to setup a TCP
 * connection and then write its socket descriptor with remote device
 * information into this sysfs file.
 *
 * A remote device is virtually attached to the root-hub port of @rhport with
 * @speed. @devid is embedded into a request to specify the remote device in a
 * server host.
 *
 * write() returns 0 on success, else negative errno.
 */
static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct vhci_device *vdev;
	struct socket *socket;
	int sockfd = 0;
	__u32 rhport = 0, devid = 0, speed = 0;

	/*
	 * @rhport: port number of vhci_hcd
	 * @sockfd: socket descriptor of an established TCP connection
	 * @devid: unique device identifier in a remote host
	 * @speed: usb device speed in a remote host
	 */
	sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed);

	usbip_dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
				rhport, sockfd, devid, speed);


	/* check received parameters */
	if (valid_args(rhport, speed) < 0)
		return -EINVAL;

	/* check sockfd */
	socket = sockfd_to_socket(sockfd);
	if (!socket)
		return  -EINVAL;

	/* now need lock until setting vdev status as used */

	/* begin a lock */
	spin_lock(&the_controller->lock);

	vdev = port_to_vdev(rhport);

	spin_lock(&vdev->ud.lock);

	if (vdev->ud.status != VDEV_ST_NULL) {
		/* end of the lock */
		spin_unlock(&vdev->ud.lock);
		spin_unlock(&the_controller->lock);

		usbip_uerr("port %d already used\n", rhport);
		return -EINVAL;
	}

	usbip_uinfo("rhport(%u) sockfd(%d) devid(%u) speed(%u)\n",
				rhport, sockfd, devid, speed);

	vdev->devid         = devid;
	vdev->speed         = speed;
	vdev->ud.tcp_socket = socket;
	vdev->ud.status     = VDEV_ST_NOTASSIGNED;

	wake_up_process(vdev->ud.tcp_rx);
	wake_up_process(vdev->ud.tcp_tx);

	spin_unlock(&vdev->ud.lock);
	spin_unlock(&the_controller->lock);
	/* end the lock */

	rh_port_connect(rhport, speed);

	return count;
}
Example #5
0
/*
 * To start a new USB/IP attachment, a userland program needs to setup a TCP
 * connection and then write its socket descriptor with remote device
 * information into this sysfs file.
 *
 * A remote device is virtually attached to the root-hub port of @rhport with
 * @speed. @busnum and @devnum are used to convert URBs between a client host
 * and a server host.
 *
 * write() returns 0 on success, else negative errno.
 */
static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct vhci_device *vdev;
	struct socket *socket;
	int sockfd = 0;
	__u32 rhport=0, busnum=0, devnum=0, speed=0;


	/*
	 * @rhport: port number of vhci_hcd
	 * @sockfd: socket descriptor of an established TCP connection
	 * @busnum: usb bus number in a remote host
	 * @devnum: usb device number in a remote host
	 * @speed: usb device speed in a remote host
	 */
	sscanf(buf, "%u %u %u %u %u", &rhport, &sockfd, &busnum, &devnum, &speed);

	dbg_vhci_sysfs("rhport(%u) sockfd(%u) busnum(%u) devnum(%u) speed(%u)\n",
			rhport, sockfd, busnum, devnum, speed);


	/* check received parameters */
	if (valid_args(rhport, busnum, devnum, speed) < 0)
		return -EINVAL;

	/* check sockfd */
	socket = sockfd_to_socket(sockfd);
	if (!socket)
		return  -EINVAL;

#if 0
	setnodelay(socket);
#endif

	/* now need lock until setting vdev status as used */

	/* begin a lock */
	spin_lock(&the_controller->lock);

	vdev = port_to_vdev(rhport);

	spin_lock(&vdev->ud.lock);

	if (vdev->ud.status != VDEV_ST_NULL) {
		/* end of the lock */
		spin_unlock(&vdev->ud.lock);
		spin_unlock(&the_controller->lock);

		uerr("port %d already used\n", rhport);
		return -EINVAL;
	}

	uinfo("rhport(%u) sockfd(%d) busnum(%u) devnum(%u) speed(%u)\n",
			rhport, sockfd, busnum, devnum, speed);

	vdev->busnum        = busnum;
	vdev->devnum        = devnum;
	vdev->speed         = speed;
	vdev->ud.tcp_socket = socket;
	vdev->ud.status     = VDEV_ST_NOTASSIGNED;

	spin_unlock(&vdev->ud.lock);
	spin_unlock(&the_controller->lock);
	/* end the lock */

	/*
	 * this function will sleep, so should be out of the lock. but, it's ok
	 * because we already marked vdev as being used. really?
	 */
	usbip_start_threads(&vdev->ud);

	rh_port_connect(rhport, speed);

	return count;
}
Example #6
0
/*
 * To start a new USB/IP attachment, a userland program needs to setup a TCP
 * connection and then write its socket descriptor with remote device
 * information into this sysfs file.
 *
 * A remote device is virtually attached to the root-hub port of @rhport with
 * @speed. @devid is embedded into a request to specify the remote device in a
 * server host.
 *
 * write() returns 0 on success, else negative errno.
 */
static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct vhci_device *vdev;
	struct socket *socket;
	int sockfd = 0;
	__u32 rhport = 0, devid = 0, speed = 0;
	int err;

	/*
	 * @rhport: port number of vhci_hcd
	 * @sockfd: socket descriptor of an established TCP connection
	 * @devid: unique device identifier in a remote host
	 * @speed: usb device speed in a remote host
	 */
	if (sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed) != 4)
		return -EINVAL;

	usbip_dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
			     rhport, sockfd, devid, speed);

	/* check received parameters */
	if (valid_args(rhport, speed) < 0)
		return -EINVAL;

	/* Extract socket from fd. */
	socket = sockfd_lookup(sockfd, &err);
	if (!socket)
		return -EINVAL;

	/* now need lock until setting vdev status as used */

	/* begin a lock */
	spin_lock(&the_controller->lock);
	vdev = port_to_vdev(rhport);
	spin_lock(&vdev->ud.lock);

	if (vdev->ud.status != VDEV_ST_NULL) {
		/* end of the lock */
		spin_unlock(&vdev->ud.lock);
		spin_unlock(&the_controller->lock);

		sockfd_put(socket);

		dev_err(dev, "port %d already used\n", rhport);
		return -EINVAL;
	}

	dev_info(dev,
		 "rhport(%u) sockfd(%d) devid(%u) speed(%u) speed_str(%s)\n",
		 rhport, sockfd, devid, speed, usb_speed_string(speed));

	vdev->devid         = devid;
	vdev->speed         = speed;
	vdev->ud.tcp_socket = socket;
	vdev->ud.status     = VDEV_ST_NOTASSIGNED;

	spin_unlock(&vdev->ud.lock);
	spin_unlock(&the_controller->lock);
	/* end the lock */

	vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
	vdev->ud.tcp_tx = kthread_get_run(vhci_tx_loop, &vdev->ud, "vhci_tx");

	rh_port_connect(rhport, speed);

	return count;
}