usb: Add support for indicating whether a port is removable

Userspace may want to make policy decisions based on whether or not a
given USB device is removable. Add a per-device member and support
for exposing it in sysfs. Information sources to populate it will be
added later.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 27a4e16d2bf1..b2eb3a47caf5 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -376,6 +376,12 @@ struct usb_bus {
 
 struct usb_tt;
 
+enum usb_device_removable {
+        USB_DEVICE_REMOVABLE_UNKNOWN = 0,
+        USB_DEVICE_REMOVABLE,
+        USB_DEVICE_FIXED,
+};
+
 /**
  * struct usb_device - kernel's representation of a USB device
  * @devnum: device number; address on a USB bus
@@ -432,6 +438,7 @@ struct usb_tt;
  * @wusb_dev: if this is a Wireless USB device, link to the WUSB
  *      specific data for the device.
  * @slot_id: Slot ID assigned by xHCI
+ * @removable: Device can be physically removed from this port
  *
  * Notes:
  * Usbcore drivers should not set usbdev->state directly.  Instead use
@@ -509,6 +516,7 @@ struct usb_device {
 #endif
         struct wusb_dev *wusb_dev;
         int slot_id;
+        enum usb_device_removable removable;
 };
 #define to_usb_device(d) container_of(d, struct usb_device, dev)