diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 2ab222be8fd1..b04afd06e502 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -169,6 +169,16 @@ show_quirks(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL); +static ssize_t +show_urbnum(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device(dev); + return sprintf(buf, "%d\n", atomic_read(&udev->urbnum)); +} +static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL); + #if defined(CONFIG_USB_PERSIST) || defined(CONFIG_USB_SUSPEND) static const char power_group[] = "power"; @@ -413,6 +423,44 @@ usb_descriptor_attr(bDeviceProtocol, "%02x\n") usb_descriptor_attr(bNumConfigurations, "%d\n") usb_descriptor_attr(bMaxPacketSize0, "%d\n") + + +/* show if the device is authorized (1) or not (0) */ +static ssize_t usb_dev_authorized_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct usb_device *usb_dev = to_usb_device(dev); + return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized); +} + + +/* + * Authorize a device to be used in the system + * + * Writing a 0 deauthorizes the device, writing a 1 authorizes it. + */ +static ssize_t usb_dev_authorized_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + ssize_t result; + struct usb_device *usb_dev = to_usb_device(dev); + unsigned val; + result = sscanf(buf, "%u\n", &val); + if (result != 1) + result = -EINVAL; + else if (val == 0) + result = usb_deauthorize_device(usb_dev); + else + result = usb_authorize_device(usb_dev); + return result < 0? result : size; +} + +static DEVICE_ATTR(authorized, 0644, + usb_dev_authorized_show, usb_dev_authorized_store); + + static struct attribute *dev_attrs[] = { /* current configuration's attributes */ &dev_attr_configuration.attr, @@ -420,6 +468,7 @@ static struct attribute *dev_attrs[] = { &dev_attr_bConfigurationValue.attr, &dev_attr_bmAttributes.attr, &dev_attr_bMaxPower.attr, + &dev_attr_urbnum.attr, /* device attributes */ &dev_attr_idVendor.attr, &dev_attr_idProduct.attr, @@ -435,6 +484,7 @@ static struct attribute *dev_attrs[] = { &dev_attr_version.attr, &dev_attr_maxchild.attr, &dev_attr_quirks.attr, + &dev_attr_authorized.attr, NULL, }; static struct attribute_group dev_attr_grp = { |