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authorKay Sievers <kay.sievers@vrfy.org>2005-07-31 01:05:53 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2005-09-08 16:22:29 -0700
commitfbf82fd2e1f4e679c60516d772d1862c941ca845 (patch)
tree85aee08e665076cf90251e705db13f03b136ce0a /include/linux
parent22af8878d2d641c6b15fe39fe4de3c05b2c477f0 (diff)
[PATCH] USB: real nodes instead of usbfs
This patch introduces a /sys/class/usb_device/ class where every connected usb-device will show up: tree /sys/class/usb_device/ /sys/class/usb_device/ |-- usb1.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.0/usb1 |-- usb2.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.1/usb2 ... The presence of the "dev" file lets udev create real device nodes. kay@pim:~/src/linux-2.6> tree /dev/bus/usb/ /dev/bus/usb/ |-- 1 | `-- 1 |-- 2 | `-- 1 ... udev rule: SUBSYSTEM="usb_device", PROGRAM="/sbin/usb_device %k", NAME="%c" (echo $1 | /bin/sed 's/usb\([0-9]*\)\.\([0-9]*\)/bus\/usb\/\1\/\2/') This makes libusb pick up the real nodes instead of the mounted usbfs: export USB_DEVFS_PATH=/dev/bus/usb Background: All this makes it possible to manage usb devices with udev instead of the devfs solution. We are currently working on a pam_console/resmgr replacement driven by udev and a pam-helper. It applies ACL's to device nodes, which is required for modern desktop functionalty like "Fast User Switching" or multiple local login support. New patch with its own major. I've succesfully disabled usbfs and use real nodes only on my box. With: "export USB_DEVFS_PATH=/dev/bus/usb" libusb picks up the udev managed nodes instead of reading usbfs files. This makes udev to provide symlinks for libusb to pick up: SUBSYSTEM="usb_device", PROGRAM="/sbin/usbdevice %k", SYMLINK="%c" /sbin/usbdevice: #!/bin/sh echo $1 | /bin/sed 's/usbdev\([0-9]*\)\.\([0-9]*\)/bus\/usb\/\1\/\2/' Signed-off-by: Kay Sievers <kay.sievers@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/usb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 72463779299..434e35120c6 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -5,6 +5,7 @@
#include <linux/usb_ch9.h>
#define USB_MAJOR 180
+#define USB_DEVICE_MAJOR 189
#ifdef __KERNEL__
@@ -349,6 +350,7 @@ struct usb_device {
char *manufacturer;
char *serial; /* static strings from the device */
struct list_head filelist;
+ struct class_device *class_dev;
struct dentry *usbfs_dentry; /* usbfs dentry entry for the device */
/*