USB: usbfs: deprecate and hide option for !embedded (cc71329b) · Commits · 戴 / test

Modern systems do not use usbfs; the entries within it are files, not device nodes, and do not support ACLs which are the default way to provide access to USB devices to untrusted users. It is replaced by device-nodes maintained by udev in /dev/bus/usb, libusb uses this device nodes. Mark the option as deprecated, and hide entirely for non-embedded builds (which may not be using udev but require raw USB device access). Signed-off-by:

Scott James Remnant <scott@canonical.com> Acked-by:

Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:

Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/Kconfig

+10 −6

Original line number	Diff line number	Diff line
		@@ -28,7 +28,7 @@ comment "Miscellaneous USB options"
		depends on USB

		config USB_DEVICEFS
		bool "USB device filesystem"
		bool "USB device filesystem (DEPRECATED)" if EMBEDDED
		depends on USB
		---help---
		If you say Y here (and to "/proc file system support" in the "File
		@@ -46,11 +46,15 @@ config USB_DEVICEFS
		For the format of the various /proc/bus/usb/ files, please read
		<file:Documentation/usb/proc_usb_info.txt>.

		Usbfs files can't handle Access Control Lists (ACL), which are the
		default way to grant access to USB devices for untrusted users of a
		desktop system. The usbfs functionality is replaced by real
		device-nodes managed by udev. These nodes live in /dev/bus/usb and
		are used by libusb.
		Modern Linux systems do not use this.

		Usbfs entries are files and not character devices; usbfs can't
		handle Access Control Lists (ACL) which are the default way to
		grant access to USB devices for untrusted users of a desktop
		system.

		The usbfs functionality is replaced by real device-nodes managed by
		udev. These nodes lived in /dev/bus/usb and are used by libusb.

		config USB_DEVICE_CLASS
		bool "USB device class-devices (DEPRECATED)"

Admin message