/* 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;
}
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 ;
}
/* 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;
}
/*
* 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;
}
/*
* 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;
}
/*
* 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;
}