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usb: interface authorization: Introduces the default interface authorization

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Interfaces are allowed per default.
This can disabled or enabled (again) by writing 0 or 1 to
/sys/bus/usb/devices/usbX/interface_authorized_default

Signed-off-by: Stefan Koch <stefan.koch10@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Koch 2015-08-25 21:10:06 +02:00 • committed by Greg Kroah-Hartman
parent 4ad2ddce1a
commit 6b2bd3c8c6
3 changed files with 57 additions and 0 deletions
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9
include/linux/usb/hcd.h
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@ -120,6 +120,7 @@ struct usb_hcd {
#define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
#define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */
#define HCD_FLAG_DEAD 6 /* controller has died? */
#define HCD_FLAG_INTF_AUTHORIZED 7 /* authorize interfaces? */
/* The flags can be tested using these macros; they are likely to
* be slightly faster than test_bit().
@ -131,6 +132,14 @@ struct usb_hcd {
#define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
#define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD))
/*
* Specifies if interfaces are authorized by default
* or they require explicit user space authorization; this bit is
* settable through /sys/class/usb_host/X/interface_authorized_default
*/
#define HCD_INTF_AUTHORIZED(hcd) \
((hcd)->flags & (1U << HCD_FLAG_INTF_AUTHORIZED))
/* Flags that get set only during HCD registration or removal. */
unsigned rh_registered:1;/* is root hub registered? */
unsigned rh_pollable:1; /* may we poll the root hub? */