![Oliver Neukum](/assets/img/avatar_default.png)
the memory barrier is needed only with smp. Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1678 lines
43 KiB
C
1678 lines
43 KiB
C
/*****************************************************************************/
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/*
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* devio.c -- User space communication with USB devices.
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*
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* Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
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*
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* This file implements the usbfs/x/y files, where
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* x is the bus number and y the device number.
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*
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* It allows user space programs/"drivers" to communicate directly
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* with USB devices without intervening kernel driver.
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*
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* Revision history
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* 22.12.1999 0.1 Initial release (split from proc_usb.c)
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* 04.01.2000 0.2 Turned into its own filesystem
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* 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
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* (CAN-2005-3055)
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*/
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/*****************************************************************************/
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/smp_lock.h>
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#include <linux/signal.h>
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#include <linux/poll.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/usbdevice_fs.h>
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#include <linux/cdev.h>
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#include <linux/notifier.h>
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#include <linux/security.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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#include <linux/moduleparam.h>
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#include "hcd.h" /* for usbcore internals */
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#include "usb.h"
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#define USB_MAXBUS 64
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#define USB_DEVICE_MAX USB_MAXBUS * 128
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/* Mutual exclusion for removal, open, and release */
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DEFINE_MUTEX(usbfs_mutex);
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struct async {
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struct list_head asynclist;
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struct dev_state *ps;
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struct pid *pid;
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uid_t uid, euid;
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unsigned int signr;
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unsigned int ifnum;
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void __user *userbuffer;
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void __user *userurb;
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struct urb *urb;
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u32 secid;
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};
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static int usbfs_snoop = 0;
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module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
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#define snoop(dev, format, arg...) \
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do { \
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if (usbfs_snoop) \
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dev_info( dev , format , ## arg); \
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} while (0)
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#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
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#define MAX_USBFS_BUFFER_SIZE 16384
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static inline int connected (struct dev_state *ps)
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{
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return (!list_empty(&ps->list) &&
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ps->dev->state != USB_STATE_NOTATTACHED);
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}
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static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
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{
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loff_t ret;
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lock_kernel();
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switch (orig) {
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case 0:
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file->f_pos = offset;
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ret = file->f_pos;
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break;
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case 1:
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file->f_pos += offset;
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ret = file->f_pos;
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break;
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case 2:
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default:
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ret = -EINVAL;
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}
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unlock_kernel();
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return ret;
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}
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static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
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{
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struct dev_state *ps = file->private_data;
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struct usb_device *dev = ps->dev;
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ssize_t ret = 0;
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unsigned len;
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loff_t pos;
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int i;
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pos = *ppos;
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usb_lock_device(dev);
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if (!connected(ps)) {
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ret = -ENODEV;
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goto err;
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} else if (pos < 0) {
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ret = -EINVAL;
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goto err;
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}
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if (pos < sizeof(struct usb_device_descriptor)) {
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struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
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memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
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le16_to_cpus(&temp_desc.bcdUSB);
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le16_to_cpus(&temp_desc.idVendor);
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le16_to_cpus(&temp_desc.idProduct);
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le16_to_cpus(&temp_desc.bcdDevice);
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len = sizeof(struct usb_device_descriptor) - pos;
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if (len > nbytes)
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len = nbytes;
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if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
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ret = -EFAULT;
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goto err;
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}
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*ppos += len;
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buf += len;
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nbytes -= len;
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ret += len;
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}
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pos = sizeof(struct usb_device_descriptor);
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for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
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struct usb_config_descriptor *config =
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(struct usb_config_descriptor *)dev->rawdescriptors[i];
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unsigned int length = le16_to_cpu(config->wTotalLength);
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if (*ppos < pos + length) {
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/* The descriptor may claim to be longer than it
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* really is. Here is the actual allocated length. */
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unsigned alloclen =
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le16_to_cpu(dev->config[i].desc.wTotalLength);
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len = length - (*ppos - pos);
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if (len > nbytes)
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len = nbytes;
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/* Simply don't write (skip over) unallocated parts */
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if (alloclen > (*ppos - pos)) {
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alloclen -= (*ppos - pos);
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if (copy_to_user(buf,
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dev->rawdescriptors[i] + (*ppos - pos),
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min(len, alloclen))) {
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ret = -EFAULT;
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goto err;
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}
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}
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*ppos += len;
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buf += len;
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nbytes -= len;
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ret += len;
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}
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pos += length;
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}
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err:
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usb_unlock_device(dev);
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return ret;
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}
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/*
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* async list handling
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*/
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static struct async *alloc_async(unsigned int numisoframes)
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{
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unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
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struct async *as = kzalloc(assize, GFP_KERNEL);
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if (!as)
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return NULL;
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as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
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if (!as->urb) {
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kfree(as);
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return NULL;
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}
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return as;
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}
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static void free_async(struct async *as)
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{
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put_pid(as->pid);
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kfree(as->urb->transfer_buffer);
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kfree(as->urb->setup_packet);
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usb_free_urb(as->urb);
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kfree(as);
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}
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static inline void async_newpending(struct async *as)
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{
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struct dev_state *ps = as->ps;
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unsigned long flags;
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spin_lock_irqsave(&ps->lock, flags);
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list_add_tail(&as->asynclist, &ps->async_pending);
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spin_unlock_irqrestore(&ps->lock, flags);
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}
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static inline void async_removepending(struct async *as)
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{
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struct dev_state *ps = as->ps;
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unsigned long flags;
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spin_lock_irqsave(&ps->lock, flags);
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list_del_init(&as->asynclist);
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spin_unlock_irqrestore(&ps->lock, flags);
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}
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static inline struct async *async_getcompleted(struct dev_state *ps)
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{
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unsigned long flags;
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struct async *as = NULL;
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spin_lock_irqsave(&ps->lock, flags);
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if (!list_empty(&ps->async_completed)) {
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as = list_entry(ps->async_completed.next, struct async, asynclist);
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list_del_init(&as->asynclist);
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}
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spin_unlock_irqrestore(&ps->lock, flags);
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return as;
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}
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static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
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{
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unsigned long flags;
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struct async *as;
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spin_lock_irqsave(&ps->lock, flags);
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list_for_each_entry(as, &ps->async_pending, asynclist)
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if (as->userurb == userurb) {
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list_del_init(&as->asynclist);
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spin_unlock_irqrestore(&ps->lock, flags);
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return as;
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}
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spin_unlock_irqrestore(&ps->lock, flags);
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return NULL;
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}
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static void snoop_urb(struct urb *urb, void __user *userurb)
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{
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int j;
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unsigned char *data = urb->transfer_buffer;
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if (!usbfs_snoop)
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return;
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if (urb->pipe & USB_DIR_IN)
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dev_info(&urb->dev->dev, "direction=IN\n");
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else
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dev_info(&urb->dev->dev, "direction=OUT\n");
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dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
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dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
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urb->transfer_buffer_length);
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dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
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dev_info(&urb->dev->dev, "data: ");
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for (j = 0; j < urb->transfer_buffer_length; ++j)
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printk ("%02x ", data[j]);
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printk("\n");
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}
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static void async_completed(struct urb *urb)
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{
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struct async *as = urb->context;
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struct dev_state *ps = as->ps;
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struct siginfo sinfo;
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spin_lock(&ps->lock);
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list_move_tail(&as->asynclist, &ps->async_completed);
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spin_unlock(&ps->lock);
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if (as->signr) {
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sinfo.si_signo = as->signr;
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sinfo.si_errno = as->urb->status;
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sinfo.si_code = SI_ASYNCIO;
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sinfo.si_addr = as->userurb;
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kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
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as->euid, as->secid);
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}
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snoop(&urb->dev->dev, "urb complete\n");
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snoop_urb(urb, as->userurb);
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wake_up(&ps->wait);
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}
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static void destroy_async (struct dev_state *ps, struct list_head *list)
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{
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struct async *as;
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unsigned long flags;
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spin_lock_irqsave(&ps->lock, flags);
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while (!list_empty(list)) {
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as = list_entry(list->next, struct async, asynclist);
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list_del_init(&as->asynclist);
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/* drop the spinlock so the completion handler can run */
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spin_unlock_irqrestore(&ps->lock, flags);
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usb_kill_urb(as->urb);
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spin_lock_irqsave(&ps->lock, flags);
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}
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spin_unlock_irqrestore(&ps->lock, flags);
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as = async_getcompleted(ps);
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while (as) {
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free_async(as);
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as = async_getcompleted(ps);
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}
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}
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static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
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{
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struct list_head *p, *q, hitlist;
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unsigned long flags;
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INIT_LIST_HEAD(&hitlist);
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spin_lock_irqsave(&ps->lock, flags);
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list_for_each_safe(p, q, &ps->async_pending)
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if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
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list_move_tail(p, &hitlist);
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spin_unlock_irqrestore(&ps->lock, flags);
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destroy_async(ps, &hitlist);
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}
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static inline void destroy_all_async(struct dev_state *ps)
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{
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destroy_async(ps, &ps->async_pending);
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}
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/*
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* interface claims are made only at the request of user level code,
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* which can also release them (explicitly or by closing files).
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* they're also undone when devices disconnect.
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*/
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static int driver_probe (struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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return -ENODEV;
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}
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static void driver_disconnect(struct usb_interface *intf)
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{
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struct dev_state *ps = usb_get_intfdata (intf);
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unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
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if (!ps)
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return;
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/* NOTE: this relies on usbcore having canceled and completed
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* all pending I/O requests; 2.6 does that.
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*/
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if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
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clear_bit(ifnum, &ps->ifclaimed);
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else
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warn("interface number %u out of range", ifnum);
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usb_set_intfdata (intf, NULL);
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/* force async requests to complete */
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destroy_async_on_interface(ps, ifnum);
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}
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struct usb_driver usbfs_driver = {
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.name = "usbfs",
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.probe = driver_probe,
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.disconnect = driver_disconnect,
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};
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static int claimintf(struct dev_state *ps, unsigned int ifnum)
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{
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struct usb_device *dev = ps->dev;
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struct usb_interface *intf;
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int err;
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if (ifnum >= 8*sizeof(ps->ifclaimed))
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return -EINVAL;
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/* already claimed */
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if (test_bit(ifnum, &ps->ifclaimed))
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return 0;
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intf = usb_ifnum_to_if(dev, ifnum);
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if (!intf)
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err = -ENOENT;
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else
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err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
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if (err == 0)
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set_bit(ifnum, &ps->ifclaimed);
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return err;
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}
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static int releaseintf(struct dev_state *ps, unsigned int ifnum)
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{
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struct usb_device *dev;
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struct usb_interface *intf;
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int err;
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err = -EINVAL;
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if (ifnum >= 8*sizeof(ps->ifclaimed))
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return err;
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dev = ps->dev;
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intf = usb_ifnum_to_if(dev, ifnum);
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if (!intf)
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err = -ENOENT;
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else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
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usb_driver_release_interface(&usbfs_driver, intf);
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err = 0;
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}
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return err;
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}
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|
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static int checkintf(struct dev_state *ps, unsigned int ifnum)
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{
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if (ps->dev->state != USB_STATE_CONFIGURED)
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return -EHOSTUNREACH;
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if (ifnum >= 8*sizeof(ps->ifclaimed))
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return -EINVAL;
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if (test_bit(ifnum, &ps->ifclaimed))
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return 0;
|
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/* if not yet claimed, claim it for the driver */
|
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dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
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current->pid, current->comm, ifnum);
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return claimintf(ps, ifnum);
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}
|
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|
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static int findintfep(struct usb_device *dev, unsigned int ep)
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{
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unsigned int i, j, e;
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struct usb_interface *intf;
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struct usb_host_interface *alts;
|
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struct usb_endpoint_descriptor *endpt;
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|
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if (ep & ~(USB_DIR_IN|0xf))
|
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return -EINVAL;
|
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if (!dev->actconfig)
|
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return -ESRCH;
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for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
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intf = dev->actconfig->interface[i];
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for (j = 0; j < intf->num_altsetting; j++) {
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alts = &intf->altsetting[j];
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for (e = 0; e < alts->desc.bNumEndpoints; e++) {
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endpt = &alts->endpoint[e].desc;
|
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if (endpt->bEndpointAddress == ep)
|
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return alts->desc.bInterfaceNumber;
|
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}
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
|
|
{
|
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int ret = 0;
|
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|
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if (ps->dev->state != USB_STATE_ADDRESS
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&& ps->dev->state != USB_STATE_CONFIGURED)
|
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return -EHOSTUNREACH;
|
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if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
|
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return 0;
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|
|
index &= 0xff;
|
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switch (requesttype & USB_RECIP_MASK) {
|
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case USB_RECIP_ENDPOINT:
|
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if ((ret = findintfep(ps->dev, index)) >= 0)
|
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ret = checkintf(ps, ret);
|
|
break;
|
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|
|
case USB_RECIP_INTERFACE:
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ret = checkintf(ps, index);
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break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int __match_minor(struct device *dev, void *data)
|
|
{
|
|
int minor = *((int *)data);
|
|
|
|
if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor))
|
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return 1;
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_device *usbdev_lookup_by_minor(int minor)
|
|
{
|
|
struct device *dev;
|
|
|
|
dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor);
|
|
if (!dev)
|
|
return NULL;
|
|
put_device(dev);
|
|
return container_of(dev, struct usb_device, dev);
|
|
}
|
|
|
|
/*
|
|
* file operations
|
|
*/
|
|
static int usbdev_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct usb_device *dev = NULL;
|
|
struct dev_state *ps;
|
|
int ret;
|
|
|
|
/* Protect against simultaneous removal or release */
|
|
mutex_lock(&usbfs_mutex);
|
|
|
|
ret = -ENOMEM;
|
|
if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
|
|
goto out;
|
|
|
|
ret = -ENOENT;
|
|
/* usbdev device-node */
|
|
if (imajor(inode) == USB_DEVICE_MAJOR)
|
|
dev = usbdev_lookup_by_minor(iminor(inode));
|
|
#ifdef CONFIG_USB_DEVICEFS
|
|
/* procfs file */
|
|
if (!dev)
|
|
dev = inode->i_private;
|
|
#endif
|
|
if (!dev)
|
|
goto out;
|
|
ret = usb_autoresume_device(dev);
|
|
if (ret)
|
|
goto out;
|
|
|
|
usb_get_dev(dev);
|
|
ret = 0;
|
|
ps->dev = dev;
|
|
ps->file = file;
|
|
spin_lock_init(&ps->lock);
|
|
INIT_LIST_HEAD(&ps->list);
|
|
INIT_LIST_HEAD(&ps->async_pending);
|
|
INIT_LIST_HEAD(&ps->async_completed);
|
|
init_waitqueue_head(&ps->wait);
|
|
ps->discsignr = 0;
|
|
ps->disc_pid = get_pid(task_pid(current));
|
|
ps->disc_uid = current->uid;
|
|
ps->disc_euid = current->euid;
|
|
ps->disccontext = NULL;
|
|
ps->ifclaimed = 0;
|
|
security_task_getsecid(current, &ps->secid);
|
|
smp_wmb();
|
|
list_add_tail(&ps->list, &dev->filelist);
|
|
file->private_data = ps;
|
|
out:
|
|
if (ret)
|
|
kfree(ps);
|
|
mutex_unlock(&usbfs_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int usbdev_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct dev_state *ps = file->private_data;
|
|
struct usb_device *dev = ps->dev;
|
|
unsigned int ifnum;
|
|
|
|
usb_lock_device(dev);
|
|
|
|
/* Protect against simultaneous open */
|
|
mutex_lock(&usbfs_mutex);
|
|
list_del_init(&ps->list);
|
|
mutex_unlock(&usbfs_mutex);
|
|
|
|
for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
|
|
ifnum++) {
|
|
if (test_bit(ifnum, &ps->ifclaimed))
|
|
releaseintf(ps, ifnum);
|
|
}
|
|
destroy_all_async(ps);
|
|
usb_autosuspend_device(dev);
|
|
usb_unlock_device(dev);
|
|
usb_put_dev(dev);
|
|
put_pid(ps->disc_pid);
|
|
kfree(ps);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_control(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usb_device *dev = ps->dev;
|
|
struct usbdevfs_ctrltransfer ctrl;
|
|
unsigned int tmo;
|
|
unsigned char *tbuf;
|
|
int i, j, ret;
|
|
|
|
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
|
|
return -EFAULT;
|
|
if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
|
|
return ret;
|
|
if (ctrl.wLength > PAGE_SIZE)
|
|
return -EINVAL;
|
|
if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
tmo = ctrl.timeout;
|
|
if (ctrl.bRequestType & 0x80) {
|
|
if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
|
|
free_page((unsigned long)tbuf);
|
|
return -EINVAL;
|
|
}
|
|
snoop(&dev->dev, "control read: bRequest=%02x "
|
|
"bRrequestType=%02x wValue=%04x "
|
|
"wIndex=%04x wLength=%04x\n",
|
|
ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
|
|
ctrl.wIndex, ctrl.wLength);
|
|
|
|
usb_unlock_device(dev);
|
|
i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
|
|
ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
|
|
usb_lock_device(dev);
|
|
if ((i > 0) && ctrl.wLength) {
|
|
if (usbfs_snoop) {
|
|
dev_info(&dev->dev, "control read: data ");
|
|
for (j = 0; j < i; ++j)
|
|
printk("%02x ", (unsigned char)(tbuf)[j]);
|
|
printk("\n");
|
|
}
|
|
if (copy_to_user(ctrl.data, tbuf, i)) {
|
|
free_page((unsigned long)tbuf);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
} else {
|
|
if (ctrl.wLength) {
|
|
if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
|
|
free_page((unsigned long)tbuf);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
snoop(&dev->dev, "control write: bRequest=%02x "
|
|
"bRrequestType=%02x wValue=%04x "
|
|
"wIndex=%04x wLength=%04x\n",
|
|
ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
|
|
ctrl.wIndex, ctrl.wLength);
|
|
if (usbfs_snoop) {
|
|
dev_info(&dev->dev, "control write: data: ");
|
|
for (j = 0; j < ctrl.wLength; ++j)
|
|
printk("%02x ", (unsigned char)(tbuf)[j]);
|
|
printk("\n");
|
|
}
|
|
usb_unlock_device(dev);
|
|
i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
|
|
ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
|
|
usb_lock_device(dev);
|
|
}
|
|
free_page((unsigned long)tbuf);
|
|
if (i<0 && i != -EPIPE) {
|
|
dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
|
|
"failed cmd %s rqt %u rq %u len %u ret %d\n",
|
|
current->comm, ctrl.bRequestType, ctrl.bRequest,
|
|
ctrl.wLength, i);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static int proc_bulk(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usb_device *dev = ps->dev;
|
|
struct usbdevfs_bulktransfer bulk;
|
|
unsigned int tmo, len1, pipe;
|
|
int len2;
|
|
unsigned char *tbuf;
|
|
int i, j, ret;
|
|
|
|
if (copy_from_user(&bulk, arg, sizeof(bulk)))
|
|
return -EFAULT;
|
|
if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
|
|
return ret;
|
|
if ((ret = checkintf(ps, ret)))
|
|
return ret;
|
|
if (bulk.ep & USB_DIR_IN)
|
|
pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
|
|
else
|
|
pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
|
|
if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
|
|
return -EINVAL;
|
|
len1 = bulk.len;
|
|
if (len1 > MAX_USBFS_BUFFER_SIZE)
|
|
return -EINVAL;
|
|
if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
tmo = bulk.timeout;
|
|
if (bulk.ep & 0x80) {
|
|
if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
|
|
kfree(tbuf);
|
|
return -EINVAL;
|
|
}
|
|
snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
|
|
bulk.len, bulk.timeout);
|
|
usb_unlock_device(dev);
|
|
i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
|
|
usb_lock_device(dev);
|
|
if (!i && len2) {
|
|
if (usbfs_snoop) {
|
|
dev_info(&dev->dev, "bulk read: data ");
|
|
for (j = 0; j < len2; ++j)
|
|
printk("%02x ", (unsigned char)(tbuf)[j]);
|
|
printk("\n");
|
|
}
|
|
if (copy_to_user(bulk.data, tbuf, len2)) {
|
|
kfree(tbuf);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
} else {
|
|
if (len1) {
|
|
if (copy_from_user(tbuf, bulk.data, len1)) {
|
|
kfree(tbuf);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
|
|
bulk.len, bulk.timeout);
|
|
if (usbfs_snoop) {
|
|
dev_info(&dev->dev, "bulk write: data: ");
|
|
for (j = 0; j < len1; ++j)
|
|
printk("%02x ", (unsigned char)(tbuf)[j]);
|
|
printk("\n");
|
|
}
|
|
usb_unlock_device(dev);
|
|
i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
|
|
usb_lock_device(dev);
|
|
}
|
|
kfree(tbuf);
|
|
if (i < 0)
|
|
return i;
|
|
return len2;
|
|
}
|
|
|
|
static int proc_resetep(struct dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ep;
|
|
int ret;
|
|
|
|
if (get_user(ep, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
if ((ret = findintfep(ps->dev, ep)) < 0)
|
|
return ret;
|
|
if ((ret = checkintf(ps, ret)))
|
|
return ret;
|
|
usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_clearhalt(struct dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ep;
|
|
int pipe;
|
|
int ret;
|
|
|
|
if (get_user(ep, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
if ((ret = findintfep(ps->dev, ep)) < 0)
|
|
return ret;
|
|
if ((ret = checkintf(ps, ret)))
|
|
return ret;
|
|
if (ep & USB_DIR_IN)
|
|
pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
|
|
else
|
|
pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
|
|
|
|
return usb_clear_halt(ps->dev, pipe);
|
|
}
|
|
|
|
|
|
static int proc_getdriver(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_getdriver gd;
|
|
struct usb_interface *intf;
|
|
int ret;
|
|
|
|
if (copy_from_user(&gd, arg, sizeof(gd)))
|
|
return -EFAULT;
|
|
intf = usb_ifnum_to_if(ps->dev, gd.interface);
|
|
if (!intf || !intf->dev.driver)
|
|
ret = -ENODATA;
|
|
else {
|
|
strncpy(gd.driver, intf->dev.driver->name,
|
|
sizeof(gd.driver));
|
|
ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int proc_connectinfo(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_connectinfo ci;
|
|
|
|
ci.devnum = ps->dev->devnum;
|
|
ci.slow = ps->dev->speed == USB_SPEED_LOW;
|
|
if (copy_to_user(arg, &ci, sizeof(ci)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int proc_resetdevice(struct dev_state *ps)
|
|
{
|
|
return usb_reset_composite_device(ps->dev, NULL);
|
|
}
|
|
|
|
static int proc_setintf(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_setinterface setintf;
|
|
int ret;
|
|
|
|
if (copy_from_user(&setintf, arg, sizeof(setintf)))
|
|
return -EFAULT;
|
|
if ((ret = checkintf(ps, setintf.interface)))
|
|
return ret;
|
|
return usb_set_interface(ps->dev, setintf.interface,
|
|
setintf.altsetting);
|
|
}
|
|
|
|
static int proc_setconfig(struct dev_state *ps, void __user *arg)
|
|
{
|
|
int u;
|
|
int status = 0;
|
|
struct usb_host_config *actconfig;
|
|
|
|
if (get_user(u, (int __user *)arg))
|
|
return -EFAULT;
|
|
|
|
actconfig = ps->dev->actconfig;
|
|
|
|
/* Don't touch the device if any interfaces are claimed.
|
|
* It could interfere with other drivers' operations, and if
|
|
* an interface is claimed by usbfs it could easily deadlock.
|
|
*/
|
|
if (actconfig) {
|
|
int i;
|
|
|
|
for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
|
|
if (usb_interface_claimed(actconfig->interface[i])) {
|
|
dev_warn (&ps->dev->dev,
|
|
"usbfs: interface %d claimed by %s "
|
|
"while '%s' sets config #%d\n",
|
|
actconfig->interface[i]
|
|
->cur_altsetting
|
|
->desc.bInterfaceNumber,
|
|
actconfig->interface[i]
|
|
->dev.driver->name,
|
|
current->comm, u);
|
|
status = -EBUSY;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* SET_CONFIGURATION is often abused as a "cheap" driver reset,
|
|
* so avoid usb_set_configuration()'s kick to sysfs
|
|
*/
|
|
if (status == 0) {
|
|
if (actconfig && actconfig->desc.bConfigurationValue == u)
|
|
status = usb_reset_configuration(ps->dev);
|
|
else
|
|
status = usb_set_configuration(ps->dev, u);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
|
|
struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
|
|
void __user *arg)
|
|
{
|
|
struct usbdevfs_iso_packet_desc *isopkt = NULL;
|
|
struct usb_host_endpoint *ep;
|
|
struct async *as;
|
|
struct usb_ctrlrequest *dr = NULL;
|
|
unsigned int u, totlen, isofrmlen;
|
|
int ret, ifnum = -1;
|
|
|
|
if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
|
|
URB_NO_FSBR|URB_ZERO_PACKET))
|
|
return -EINVAL;
|
|
if (!uurb->buffer)
|
|
return -EINVAL;
|
|
if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
|
|
return -EINVAL;
|
|
if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
|
|
if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
|
|
return ifnum;
|
|
if ((ret = checkintf(ps, ifnum)))
|
|
return ret;
|
|
}
|
|
if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
|
|
ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
|
|
else
|
|
ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
|
|
if (!ep)
|
|
return -ENOENT;
|
|
switch(uurb->type) {
|
|
case USBDEVFS_URB_TYPE_CONTROL:
|
|
if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
|
|
!= USB_ENDPOINT_XFER_CONTROL)
|
|
return -EINVAL;
|
|
/* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
|
|
if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
|
|
return -EINVAL;
|
|
if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
if (copy_from_user(dr, uurb->buffer, 8)) {
|
|
kfree(dr);
|
|
return -EFAULT;
|
|
}
|
|
if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
|
|
kfree(dr);
|
|
return -EINVAL;
|
|
}
|
|
if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
|
|
kfree(dr);
|
|
return ret;
|
|
}
|
|
uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
|
|
uurb->number_of_packets = 0;
|
|
uurb->buffer_length = le16_to_cpup(&dr->wLength);
|
|
uurb->buffer += 8;
|
|
if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
|
|
kfree(dr);
|
|
return -EFAULT;
|
|
}
|
|
snoop(&ps->dev->dev, "control urb: bRequest=%02x "
|
|
"bRrequestType=%02x wValue=%04x "
|
|
"wIndex=%04x wLength=%04x\n",
|
|
dr->bRequest, dr->bRequestType, dr->wValue,
|
|
dr->wIndex, dr->wLength);
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_BULK:
|
|
switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
|
|
case USB_ENDPOINT_XFER_CONTROL:
|
|
case USB_ENDPOINT_XFER_ISOC:
|
|
return -EINVAL;
|
|
/* allow single-shot interrupt transfers, at bogus rates */
|
|
}
|
|
uurb->number_of_packets = 0;
|
|
if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
|
|
return -EINVAL;
|
|
if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
|
|
return -EFAULT;
|
|
snoop(&ps->dev->dev, "bulk urb\n");
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_ISO:
|
|
/* arbitrary limit */
|
|
if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
|
|
return -EINVAL;
|
|
if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
|
|
!= USB_ENDPOINT_XFER_ISOC)
|
|
return -EINVAL;
|
|
isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
|
|
if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
|
|
kfree(isopkt);
|
|
return -EFAULT;
|
|
}
|
|
for (totlen = u = 0; u < uurb->number_of_packets; u++) {
|
|
/* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
|
|
if (isopkt[u].length > 8192) {
|
|
kfree(isopkt);
|
|
return -EINVAL;
|
|
}
|
|
totlen += isopkt[u].length;
|
|
}
|
|
if (totlen > 32768) {
|
|
kfree(isopkt);
|
|
return -EINVAL;
|
|
}
|
|
uurb->buffer_length = totlen;
|
|
snoop(&ps->dev->dev, "iso urb\n");
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_INTERRUPT:
|
|
uurb->number_of_packets = 0;
|
|
if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
|
|
!= USB_ENDPOINT_XFER_INT)
|
|
return -EINVAL;
|
|
if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
|
|
return -EINVAL;
|
|
if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
|
|
return -EFAULT;
|
|
snoop(&ps->dev->dev, "interrupt urb\n");
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (!(as = alloc_async(uurb->number_of_packets))) {
|
|
kfree(isopkt);
|
|
kfree(dr);
|
|
return -ENOMEM;
|
|
}
|
|
if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
|
|
kfree(isopkt);
|
|
kfree(dr);
|
|
free_async(as);
|
|
return -ENOMEM;
|
|
}
|
|
as->urb->dev = ps->dev;
|
|
as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
|
|
as->urb->transfer_flags = uurb->flags;
|
|
as->urb->transfer_buffer_length = uurb->buffer_length;
|
|
as->urb->setup_packet = (unsigned char*)dr;
|
|
as->urb->start_frame = uurb->start_frame;
|
|
as->urb->number_of_packets = uurb->number_of_packets;
|
|
if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
|
|
ps->dev->speed == USB_SPEED_HIGH)
|
|
as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
|
|
else
|
|
as->urb->interval = ep->desc.bInterval;
|
|
as->urb->context = as;
|
|
as->urb->complete = async_completed;
|
|
for (totlen = u = 0; u < uurb->number_of_packets; u++) {
|
|
as->urb->iso_frame_desc[u].offset = totlen;
|
|
as->urb->iso_frame_desc[u].length = isopkt[u].length;
|
|
totlen += isopkt[u].length;
|
|
}
|
|
kfree(isopkt);
|
|
as->ps = ps;
|
|
as->userurb = arg;
|
|
if (uurb->endpoint & USB_DIR_IN)
|
|
as->userbuffer = uurb->buffer;
|
|
else
|
|
as->userbuffer = NULL;
|
|
as->signr = uurb->signr;
|
|
as->ifnum = ifnum;
|
|
as->pid = get_pid(task_pid(current));
|
|
as->uid = current->uid;
|
|
as->euid = current->euid;
|
|
security_task_getsecid(current, &as->secid);
|
|
if (!(uurb->endpoint & USB_DIR_IN)) {
|
|
if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
|
|
free_async(as);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
snoop(&as->urb->dev->dev, "submit urb\n");
|
|
snoop_urb(as->urb, as->userurb);
|
|
async_newpending(as);
|
|
if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
|
|
dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
|
|
async_removepending(as);
|
|
free_async(as);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int proc_submiturb(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_urb uurb;
|
|
|
|
if (copy_from_user(&uurb, arg, sizeof(uurb)))
|
|
return -EFAULT;
|
|
|
|
return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
|
|
}
|
|
|
|
static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as;
|
|
|
|
as = async_getpending(ps, arg);
|
|
if (!as)
|
|
return -EINVAL;
|
|
usb_kill_urb(as->urb);
|
|
return 0;
|
|
}
|
|
|
|
static int processcompl(struct async *as, void __user * __user *arg)
|
|
{
|
|
struct urb *urb = as->urb;
|
|
struct usbdevfs_urb __user *userurb = as->userurb;
|
|
void __user *addr = as->userurb;
|
|
unsigned int i;
|
|
|
|
if (as->userbuffer)
|
|
if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->status, &userurb->status))
|
|
return -EFAULT;
|
|
if (put_user(urb->actual_length, &userurb->actual_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->error_count, &userurb->error_count))
|
|
return -EFAULT;
|
|
|
|
if (usb_pipeisoc(urb->pipe)) {
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
|
if (put_user(urb->iso_frame_desc[i].actual_length,
|
|
&userurb->iso_frame_desc[i].actual_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->iso_frame_desc[i].status,
|
|
&userurb->iso_frame_desc[i].status))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
free_async(as);
|
|
|
|
if (put_user(addr, (void __user * __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static struct async* reap_as(struct dev_state *ps)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
struct async *as = NULL;
|
|
struct usb_device *dev = ps->dev;
|
|
|
|
add_wait_queue(&ps->wait, &wait);
|
|
for (;;) {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
if ((as = async_getcompleted(ps)))
|
|
break;
|
|
if (signal_pending(current))
|
|
break;
|
|
usb_unlock_device(dev);
|
|
schedule();
|
|
usb_lock_device(dev);
|
|
}
|
|
remove_wait_queue(&ps->wait, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
return as;
|
|
}
|
|
|
|
static int proc_reapurb(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as = reap_as(ps);
|
|
if (as)
|
|
return processcompl(as, (void __user * __user *)arg);
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
return -EIO;
|
|
}
|
|
|
|
static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as;
|
|
|
|
if (!(as = async_getcompleted(ps)))
|
|
return -EAGAIN;
|
|
return processcompl(as, (void __user * __user *)arg);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
static int get_urb32(struct usbdevfs_urb *kurb,
|
|
struct usbdevfs_urb32 __user *uurb)
|
|
{
|
|
__u32 uptr;
|
|
if (get_user(kurb->type, &uurb->type) ||
|
|
__get_user(kurb->endpoint, &uurb->endpoint) ||
|
|
__get_user(kurb->status, &uurb->status) ||
|
|
__get_user(kurb->flags, &uurb->flags) ||
|
|
__get_user(kurb->buffer_length, &uurb->buffer_length) ||
|
|
__get_user(kurb->actual_length, &uurb->actual_length) ||
|
|
__get_user(kurb->start_frame, &uurb->start_frame) ||
|
|
__get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
|
|
__get_user(kurb->error_count, &uurb->error_count) ||
|
|
__get_user(kurb->signr, &uurb->signr))
|
|
return -EFAULT;
|
|
|
|
if (__get_user(uptr, &uurb->buffer))
|
|
return -EFAULT;
|
|
kurb->buffer = compat_ptr(uptr);
|
|
if (__get_user(uptr, &uurb->buffer))
|
|
return -EFAULT;
|
|
kurb->usercontext = compat_ptr(uptr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_urb uurb;
|
|
|
|
if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg))
|
|
return -EFAULT;
|
|
|
|
return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
|
|
}
|
|
|
|
static int processcompl_compat(struct async *as, void __user * __user *arg)
|
|
{
|
|
struct urb *urb = as->urb;
|
|
struct usbdevfs_urb32 __user *userurb = as->userurb;
|
|
void __user *addr = as->userurb;
|
|
unsigned int i;
|
|
|
|
if (as->userbuffer)
|
|
if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->status, &userurb->status))
|
|
return -EFAULT;
|
|
if (put_user(urb->actual_length, &userurb->actual_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->error_count, &userurb->error_count))
|
|
return -EFAULT;
|
|
|
|
if (usb_pipeisoc(urb->pipe)) {
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
|
if (put_user(urb->iso_frame_desc[i].actual_length,
|
|
&userurb->iso_frame_desc[i].actual_length))
|
|
return -EFAULT;
|
|
if (put_user(urb->iso_frame_desc[i].status,
|
|
&userurb->iso_frame_desc[i].status))
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
free_async(as);
|
|
if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as = reap_as(ps);
|
|
if (as)
|
|
return processcompl_compat(as, (void __user * __user *)arg);
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
return -EIO;
|
|
}
|
|
|
|
static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as;
|
|
|
|
if (!(as = async_getcompleted(ps)))
|
|
return -EAGAIN;
|
|
return processcompl_compat(as, (void __user * __user *)arg);
|
|
}
|
|
|
|
#endif
|
|
|
|
static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_disconnectsignal ds;
|
|
|
|
if (copy_from_user(&ds, arg, sizeof(ds)))
|
|
return -EFAULT;
|
|
if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
|
|
return -EINVAL;
|
|
ps->discsignr = ds.signr;
|
|
ps->disccontext = ds.context;
|
|
return 0;
|
|
}
|
|
|
|
static int proc_claiminterface(struct dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ifnum;
|
|
|
|
if (get_user(ifnum, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
return claimintf(ps, ifnum);
|
|
}
|
|
|
|
static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ifnum;
|
|
int ret;
|
|
|
|
if (get_user(ifnum, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
if ((ret = releaseintf(ps, ifnum)) < 0)
|
|
return ret;
|
|
destroy_async_on_interface (ps, ifnum);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
|
|
{
|
|
int size;
|
|
void *buf = NULL;
|
|
int retval = 0;
|
|
struct usb_interface *intf = NULL;
|
|
struct usb_driver *driver = NULL;
|
|
|
|
/* alloc buffer */
|
|
if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
|
|
if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
|
|
return -ENOMEM;
|
|
if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
|
|
if (copy_from_user (buf, ctl->data, size)) {
|
|
kfree(buf);
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
memset (buf, 0, size);
|
|
}
|
|
}
|
|
|
|
if (!connected(ps)) {
|
|
kfree(buf);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (ps->dev->state != USB_STATE_CONFIGURED)
|
|
retval = -EHOSTUNREACH;
|
|
else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
|
|
retval = -EINVAL;
|
|
else switch (ctl->ioctl_code) {
|
|
|
|
/* disconnect kernel driver from interface */
|
|
case USBDEVFS_DISCONNECT:
|
|
if (intf->dev.driver) {
|
|
driver = to_usb_driver(intf->dev.driver);
|
|
dev_dbg (&intf->dev, "disconnect by usbfs\n");
|
|
usb_driver_release_interface(driver, intf);
|
|
} else
|
|
retval = -ENODATA;
|
|
break;
|
|
|
|
/* let kernel drivers try to (re)bind to the interface */
|
|
case USBDEVFS_CONNECT:
|
|
usb_unlock_device(ps->dev);
|
|
retval = bus_rescan_devices(intf->dev.bus);
|
|
usb_lock_device(ps->dev);
|
|
break;
|
|
|
|
/* talk directly to the interface's driver */
|
|
default:
|
|
if (intf->dev.driver)
|
|
driver = to_usb_driver(intf->dev.driver);
|
|
if (driver == NULL || driver->ioctl == NULL) {
|
|
retval = -ENOTTY;
|
|
} else {
|
|
retval = driver->ioctl (intf, ctl->ioctl_code, buf);
|
|
if (retval == -ENOIOCTLCMD)
|
|
retval = -ENOTTY;
|
|
}
|
|
}
|
|
|
|
/* cleanup and return */
|
|
if (retval >= 0
|
|
&& (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
|
|
&& size > 0
|
|
&& copy_to_user (ctl->data, buf, size) != 0)
|
|
retval = -EFAULT;
|
|
|
|
kfree(buf);
|
|
return retval;
|
|
}
|
|
|
|
static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_ioctl ctrl;
|
|
|
|
if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
|
|
return -EFAULT;
|
|
return proc_ioctl(ps, &ctrl);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
|
|
{
|
|
struct usbdevfs_ioctl32 __user *uioc;
|
|
struct usbdevfs_ioctl ctrl;
|
|
u32 udata;
|
|
|
|
uioc = compat_ptr((long)arg);
|
|
if (get_user(ctrl.ifno, &uioc->ifno) ||
|
|
get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
|
|
__get_user(udata, &uioc->data))
|
|
return -EFAULT;
|
|
ctrl.data = compat_ptr(udata);
|
|
|
|
return proc_ioctl(ps, &ctrl);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* NOTE: All requests here that have interface numbers as parameters
|
|
* are assuming that somehow the configuration has been prevented from
|
|
* changing. But there's no mechanism to ensure that...
|
|
*/
|
|
static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct dev_state *ps = file->private_data;
|
|
struct usb_device *dev = ps->dev;
|
|
void __user *p = (void __user *)arg;
|
|
int ret = -ENOTTY;
|
|
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EPERM;
|
|
usb_lock_device(dev);
|
|
if (!connected(ps)) {
|
|
usb_unlock_device(dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case USBDEVFS_CONTROL:
|
|
snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
|
|
ret = proc_control(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
case USBDEVFS_BULK:
|
|
snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
|
|
ret = proc_bulk(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
case USBDEVFS_RESETEP:
|
|
snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
|
|
ret = proc_resetep(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
case USBDEVFS_RESET:
|
|
snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
|
|
ret = proc_resetdevice(ps);
|
|
break;
|
|
|
|
case USBDEVFS_CLEAR_HALT:
|
|
snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
|
|
ret = proc_clearhalt(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
case USBDEVFS_GETDRIVER:
|
|
snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
|
|
ret = proc_getdriver(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_CONNECTINFO:
|
|
snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
|
|
ret = proc_connectinfo(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SETINTERFACE:
|
|
snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
|
|
ret = proc_setintf(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SETCONFIGURATION:
|
|
snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
|
|
ret = proc_setconfig(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SUBMITURB:
|
|
snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
|
|
ret = proc_submiturb(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
case USBDEVFS_SUBMITURB32:
|
|
snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
|
|
ret = proc_submiturb_compat(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = CURRENT_TIME;
|
|
break;
|
|
|
|
case USBDEVFS_REAPURB32:
|
|
snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
|
|
ret = proc_reapurb_compat(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_REAPURBNDELAY32:
|
|
snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
|
|
ret = proc_reapurbnonblock_compat(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_IOCTL32:
|
|
snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
|
|
ret = proc_ioctl_compat(ps, ptr_to_compat(p));
|
|
break;
|
|
#endif
|
|
|
|
case USBDEVFS_DISCARDURB:
|
|
snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
|
|
ret = proc_unlinkurb(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_REAPURB:
|
|
snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
|
|
ret = proc_reapurb(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_REAPURBNDELAY:
|
|
snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
|
|
ret = proc_reapurbnonblock(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_DISCSIGNAL:
|
|
snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
|
|
ret = proc_disconnectsignal(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_CLAIMINTERFACE:
|
|
snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
|
|
ret = proc_claiminterface(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_RELEASEINTERFACE:
|
|
snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
|
|
ret = proc_releaseinterface(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_IOCTL:
|
|
snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
|
|
ret = proc_ioctl_default(ps, p);
|
|
break;
|
|
}
|
|
usb_unlock_device(dev);
|
|
if (ret >= 0)
|
|
inode->i_atime = CURRENT_TIME;
|
|
return ret;
|
|
}
|
|
|
|
/* No kernel lock - fine */
|
|
static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
|
|
{
|
|
struct dev_state *ps = file->private_data;
|
|
unsigned int mask = 0;
|
|
|
|
poll_wait(file, &ps->wait, wait);
|
|
if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
if (!connected(ps))
|
|
mask |= POLLERR | POLLHUP;
|
|
return mask;
|
|
}
|
|
|
|
const struct file_operations usbdev_file_operations = {
|
|
.llseek = usbdev_lseek,
|
|
.read = usbdev_read,
|
|
.poll = usbdev_poll,
|
|
.ioctl = usbdev_ioctl,
|
|
.open = usbdev_open,
|
|
.release = usbdev_release,
|
|
};
|
|
|
|
#ifdef CONFIG_USB_DEVICE_CLASS
|
|
static struct class *usb_classdev_class;
|
|
|
|
static int usb_classdev_add(struct usb_device *dev)
|
|
{
|
|
int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
|
|
|
|
dev->usb_classdev = device_create(usb_classdev_class, &dev->dev,
|
|
MKDEV(USB_DEVICE_MAJOR, minor),
|
|
"usbdev%d.%d", dev->bus->busnum, dev->devnum);
|
|
if (IS_ERR(dev->usb_classdev))
|
|
return PTR_ERR(dev->usb_classdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void usb_classdev_remove(struct usb_device *dev)
|
|
{
|
|
device_unregister(dev->usb_classdev);
|
|
}
|
|
|
|
static int usb_classdev_notify(struct notifier_block *self,
|
|
unsigned long action, void *dev)
|
|
{
|
|
switch (action) {
|
|
case USB_DEVICE_ADD:
|
|
if (usb_classdev_add(dev))
|
|
return NOTIFY_BAD;
|
|
break;
|
|
case USB_DEVICE_REMOVE:
|
|
usb_classdev_remove(dev);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block usbdev_nb = {
|
|
.notifier_call = usb_classdev_notify,
|
|
};
|
|
#endif
|
|
|
|
static struct cdev usb_device_cdev = {
|
|
.kobj = {.name = "usb_device", },
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
int __init usb_devio_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
|
|
"usb_device");
|
|
if (retval) {
|
|
err("unable to register minors for usb_device");
|
|
goto out;
|
|
}
|
|
cdev_init(&usb_device_cdev, &usbdev_file_operations);
|
|
retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
if (retval) {
|
|
err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
|
|
goto error_cdev;
|
|
}
|
|
#ifdef CONFIG_USB_DEVICE_CLASS
|
|
usb_classdev_class = class_create(THIS_MODULE, "usb_device");
|
|
if (IS_ERR(usb_classdev_class)) {
|
|
err("unable to register usb_device class");
|
|
retval = PTR_ERR(usb_classdev_class);
|
|
cdev_del(&usb_device_cdev);
|
|
usb_classdev_class = NULL;
|
|
goto out;
|
|
}
|
|
|
|
usb_register_notify(&usbdev_nb);
|
|
#endif
|
|
out:
|
|
return retval;
|
|
|
|
error_cdev:
|
|
unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
goto out;
|
|
}
|
|
|
|
void usb_devio_cleanup(void)
|
|
{
|
|
#ifdef CONFIG_USB_DEVICE_CLASS
|
|
usb_unregister_notify(&usbdev_nb);
|
|
class_destroy(usb_classdev_class);
|
|
#endif
|
|
cdev_del(&usb_device_cdev);
|
|
unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
}
|