2678 lines
65 KiB
C
2678 lines
65 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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* 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/sched/signal.h>
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#include <linux/slab.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/string.h>
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#include <linux/usb.h>
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#include <linux/usbdevice_fs.h>
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#include <linux/usb/hcd.h> /* for usbcore internals */
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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 <linux/user_namespace.h>
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#include <linux/scatterlist.h>
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#include <linux/uaccess.h>
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#include <linux/dma-mapping.h>
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#include <asm/byteorder.h>
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#include <linux/moduleparam.h>
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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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#define USB_SG_SIZE 16384 /* split-size for large txs */
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/* Mutual exclusion for removal, open, and release */
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DEFINE_MUTEX(usbfs_mutex);
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struct usb_dev_state {
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struct list_head list; /* state list */
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struct usb_device *dev;
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struct file *file;
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spinlock_t lock; /* protects the async urb lists */
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struct list_head async_pending;
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struct list_head async_completed;
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struct list_head memory_list;
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wait_queue_head_t wait; /* wake up if a request completed */
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unsigned int discsignr;
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struct pid *disc_pid;
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const struct cred *cred;
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void __user *disccontext;
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unsigned long ifclaimed;
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u32 secid;
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u32 disabled_bulk_eps;
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bool privileges_dropped;
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unsigned long interface_allowed_mask;
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};
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struct usb_memory {
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struct list_head memlist;
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int vma_use_count;
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int urb_use_count;
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u32 size;
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void *mem;
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dma_addr_t dma_handle;
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unsigned long vm_start;
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struct usb_dev_state *ps;
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};
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struct async {
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struct list_head asynclist;
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struct usb_dev_state *ps;
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struct pid *pid;
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const struct cred *cred;
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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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struct usb_memory *usbm;
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unsigned int mem_usage;
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int status;
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u32 secid;
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u8 bulk_addr;
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u8 bulk_status;
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};
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static bool usbfs_snoop;
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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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static unsigned usbfs_snoop_max = 65536;
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module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(usbfs_snoop_max,
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"maximum number of bytes to print while snooping");
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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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enum snoop_when {
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SUBMIT, COMPLETE
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};
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#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
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/* Limit on the total amount of memory we can allocate for transfers */
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static u32 usbfs_memory_mb = 16;
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module_param(usbfs_memory_mb, uint, 0644);
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MODULE_PARM_DESC(usbfs_memory_mb,
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"maximum MB allowed for usbfs buffers (0 = no limit)");
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static atomic64_t usbfs_memory_usage; /* Total memory currently allocated */
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/* Check whether it's okay to allocate more memory for a transfer */
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static int usbfs_increase_memory_usage(u64 amount)
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{
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u64 lim;
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lim = ACCESS_ONCE(usbfs_memory_mb);
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lim <<= 20;
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atomic64_add(amount, &usbfs_memory_usage);
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if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) {
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atomic64_sub(amount, &usbfs_memory_usage);
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return -ENOMEM;
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}
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return 0;
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}
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/* Memory for a transfer is being deallocated */
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static void usbfs_decrease_memory_usage(u64 amount)
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{
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atomic64_sub(amount, &usbfs_memory_usage);
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}
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static int connected(struct usb_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 void dec_usb_memory_use_count(struct usb_memory *usbm, int *count)
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{
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struct usb_dev_state *ps = usbm->ps;
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unsigned long flags;
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spin_lock_irqsave(&ps->lock, flags);
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--*count;
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if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) {
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list_del(&usbm->memlist);
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spin_unlock_irqrestore(&ps->lock, flags);
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usb_free_coherent(ps->dev, usbm->size, usbm->mem,
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usbm->dma_handle);
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usbfs_decrease_memory_usage(
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usbm->size + sizeof(struct usb_memory));
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kfree(usbm);
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} else {
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spin_unlock_irqrestore(&ps->lock, flags);
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}
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}
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static void usbdev_vm_open(struct vm_area_struct *vma)
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{
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struct usb_memory *usbm = vma->vm_private_data;
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unsigned long flags;
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spin_lock_irqsave(&usbm->ps->lock, flags);
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++usbm->vma_use_count;
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spin_unlock_irqrestore(&usbm->ps->lock, flags);
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}
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static void usbdev_vm_close(struct vm_area_struct *vma)
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{
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struct usb_memory *usbm = vma->vm_private_data;
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dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
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}
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static struct vm_operations_struct usbdev_vm_ops = {
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.open = usbdev_vm_open,
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.close = usbdev_vm_close
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};
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static int usbdev_mmap(struct file *file, struct vm_area_struct *vma)
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{
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struct usb_memory *usbm = NULL;
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struct usb_dev_state *ps = file->private_data;
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size_t size = vma->vm_end - vma->vm_start;
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void *mem;
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unsigned long flags;
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dma_addr_t dma_handle;
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int ret;
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ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory));
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if (ret)
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goto error;
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usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL);
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if (!usbm) {
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ret = -ENOMEM;
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goto error_decrease_mem;
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}
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mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN,
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&dma_handle);
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if (!mem) {
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ret = -ENOMEM;
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goto error_free_usbm;
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}
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memset(mem, 0, size);
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usbm->mem = mem;
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usbm->dma_handle = dma_handle;
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usbm->size = size;
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usbm->ps = ps;
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usbm->vm_start = vma->vm_start;
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usbm->vma_use_count = 1;
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INIT_LIST_HEAD(&usbm->memlist);
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if (remap_pfn_range(vma, vma->vm_start,
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virt_to_phys(usbm->mem) >> PAGE_SHIFT,
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size, vma->vm_page_prot) < 0) {
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dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
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return -EAGAIN;
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}
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vma->vm_flags |= VM_IO;
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vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
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vma->vm_ops = &usbdev_vm_ops;
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vma->vm_private_data = usbm;
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spin_lock_irqsave(&ps->lock, flags);
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list_add_tail(&usbm->memlist, &ps->memory_list);
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spin_unlock_irqrestore(&ps->lock, flags);
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return 0;
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error_free_usbm:
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kfree(usbm);
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error_decrease_mem:
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usbfs_decrease_memory_usage(size + sizeof(struct usb_memory));
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error:
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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,
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loff_t *ppos)
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{
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struct usb_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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/* 18 bytes - fits on the stack */
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struct usb_device_descriptor temp_desc;
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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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|
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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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|
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if (*ppos < pos + length) {
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|
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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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|
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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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|
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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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|
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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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/*
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* async list handling
|
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*/
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|
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static struct async *alloc_async(unsigned int numisoframes)
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{
|
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struct async *as;
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as = kzalloc(sizeof(struct async), 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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|
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static void free_async(struct async *as)
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{
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int i;
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put_pid(as->pid);
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if (as->cred)
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put_cred(as->cred);
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for (i = 0; i < as->urb->num_sgs; i++) {
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if (sg_page(&as->urb->sg[i]))
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kfree(sg_virt(&as->urb->sg[i]));
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}
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kfree(as->urb->sg);
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if (as->usbm == NULL)
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kfree(as->urb->transfer_buffer);
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else
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dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count);
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|
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kfree(as->urb->setup_packet);
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usb_free_urb(as->urb);
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usbfs_decrease_memory_usage(as->mem_usage);
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kfree(as);
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}
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static void async_newpending(struct async *as)
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{
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struct usb_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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|
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static void async_removepending(struct async *as)
|
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{
|
|
struct usb_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);
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
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}
|
|
|
|
static struct async *async_getcompleted(struct usb_dev_state *ps)
|
|
{
|
|
unsigned long flags;
|
|
struct async *as = NULL;
|
|
|
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spin_lock_irqsave(&ps->lock, flags);
|
|
if (!list_empty(&ps->async_completed)) {
|
|
as = list_entry(ps->async_completed.next, struct async,
|
|
asynclist);
|
|
list_del_init(&as->asynclist);
|
|
}
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
return as;
|
|
}
|
|
|
|
static struct async *async_getpending(struct usb_dev_state *ps,
|
|
void __user *userurb)
|
|
{
|
|
struct async *as;
|
|
|
|
list_for_each_entry(as, &ps->async_pending, asynclist)
|
|
if (as->userurb == userurb) {
|
|
list_del_init(&as->asynclist);
|
|
return as;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void snoop_urb(struct usb_device *udev,
|
|
void __user *userurb, int pipe, unsigned length,
|
|
int timeout_or_status, enum snoop_when when,
|
|
unsigned char *data, unsigned data_len)
|
|
{
|
|
static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
|
|
static const char *dirs[] = {"out", "in"};
|
|
int ep;
|
|
const char *t, *d;
|
|
|
|
if (!usbfs_snoop)
|
|
return;
|
|
|
|
ep = usb_pipeendpoint(pipe);
|
|
t = types[usb_pipetype(pipe)];
|
|
d = dirs[!!usb_pipein(pipe)];
|
|
|
|
if (userurb) { /* Async */
|
|
if (when == SUBMIT)
|
|
dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, "
|
|
"length %u\n",
|
|
userurb, ep, t, d, length);
|
|
else
|
|
dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, "
|
|
"actual_length %u status %d\n",
|
|
userurb, ep, t, d, length,
|
|
timeout_or_status);
|
|
} else {
|
|
if (when == SUBMIT)
|
|
dev_info(&udev->dev, "ep%d %s-%s, length %u, "
|
|
"timeout %d\n",
|
|
ep, t, d, length, timeout_or_status);
|
|
else
|
|
dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
|
|
"status %d\n",
|
|
ep, t, d, length, timeout_or_status);
|
|
}
|
|
|
|
data_len = min(data_len, usbfs_snoop_max);
|
|
if (data && data_len > 0) {
|
|
print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
|
|
data, data_len, 1);
|
|
}
|
|
}
|
|
|
|
static void snoop_urb_data(struct urb *urb, unsigned len)
|
|
{
|
|
int i, size;
|
|
|
|
len = min(len, usbfs_snoop_max);
|
|
if (!usbfs_snoop || len == 0)
|
|
return;
|
|
|
|
if (urb->num_sgs == 0) {
|
|
print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
|
|
urb->transfer_buffer, len, 1);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < urb->num_sgs && len; i++) {
|
|
size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
|
|
print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
|
|
sg_virt(&urb->sg[i]), size, 1);
|
|
len -= size;
|
|
}
|
|
}
|
|
|
|
static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb)
|
|
{
|
|
unsigned i, len, size;
|
|
|
|
if (urb->number_of_packets > 0) /* Isochronous */
|
|
len = urb->transfer_buffer_length;
|
|
else /* Non-Isoc */
|
|
len = urb->actual_length;
|
|
|
|
if (urb->num_sgs == 0) {
|
|
if (copy_to_user(userbuffer, urb->transfer_buffer, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < urb->num_sgs && len; i++) {
|
|
size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
|
|
if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size))
|
|
return -EFAULT;
|
|
userbuffer += size;
|
|
len -= size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define AS_CONTINUATION 1
|
|
#define AS_UNLINK 2
|
|
|
|
static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr)
|
|
__releases(ps->lock)
|
|
__acquires(ps->lock)
|
|
{
|
|
struct urb *urb;
|
|
struct async *as;
|
|
|
|
/* Mark all the pending URBs that match bulk_addr, up to but not
|
|
* including the first one without AS_CONTINUATION. If such an
|
|
* URB is encountered then a new transfer has already started so
|
|
* the endpoint doesn't need to be disabled; otherwise it does.
|
|
*/
|
|
list_for_each_entry(as, &ps->async_pending, asynclist) {
|
|
if (as->bulk_addr == bulk_addr) {
|
|
if (as->bulk_status != AS_CONTINUATION)
|
|
goto rescan;
|
|
as->bulk_status = AS_UNLINK;
|
|
as->bulk_addr = 0;
|
|
}
|
|
}
|
|
ps->disabled_bulk_eps |= (1 << bulk_addr);
|
|
|
|
/* Now carefully unlink all the marked pending URBs */
|
|
rescan:
|
|
list_for_each_entry(as, &ps->async_pending, asynclist) {
|
|
if (as->bulk_status == AS_UNLINK) {
|
|
as->bulk_status = 0; /* Only once */
|
|
urb = as->urb;
|
|
usb_get_urb(urb);
|
|
spin_unlock(&ps->lock); /* Allow completions */
|
|
usb_unlink_urb(urb);
|
|
usb_put_urb(urb);
|
|
spin_lock(&ps->lock);
|
|
goto rescan;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void async_completed(struct urb *urb)
|
|
{
|
|
struct async *as = urb->context;
|
|
struct usb_dev_state *ps = as->ps;
|
|
struct siginfo sinfo;
|
|
struct pid *pid = NULL;
|
|
u32 secid = 0;
|
|
const struct cred *cred = NULL;
|
|
int signr;
|
|
|
|
spin_lock(&ps->lock);
|
|
list_move_tail(&as->asynclist, &ps->async_completed);
|
|
as->status = urb->status;
|
|
signr = as->signr;
|
|
if (signr) {
|
|
memset(&sinfo, 0, sizeof(sinfo));
|
|
sinfo.si_signo = as->signr;
|
|
sinfo.si_errno = as->status;
|
|
sinfo.si_code = SI_ASYNCIO;
|
|
sinfo.si_addr = as->userurb;
|
|
pid = get_pid(as->pid);
|
|
cred = get_cred(as->cred);
|
|
secid = as->secid;
|
|
}
|
|
snoop(&urb->dev->dev, "urb complete\n");
|
|
snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
|
|
as->status, COMPLETE, NULL, 0);
|
|
if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN)
|
|
snoop_urb_data(urb, urb->actual_length);
|
|
|
|
if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
|
|
as->status != -ENOENT)
|
|
cancel_bulk_urbs(ps, as->bulk_addr);
|
|
spin_unlock(&ps->lock);
|
|
|
|
if (signr) {
|
|
kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
|
|
put_pid(pid);
|
|
put_cred(cred);
|
|
}
|
|
|
|
wake_up(&ps->wait);
|
|
}
|
|
|
|
static void destroy_async(struct usb_dev_state *ps, struct list_head *list)
|
|
{
|
|
struct urb *urb;
|
|
struct async *as;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ps->lock, flags);
|
|
while (!list_empty(list)) {
|
|
as = list_entry(list->next, struct async, asynclist);
|
|
list_del_init(&as->asynclist);
|
|
urb = as->urb;
|
|
usb_get_urb(urb);
|
|
|
|
/* drop the spinlock so the completion handler can run */
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
usb_kill_urb(urb);
|
|
usb_put_urb(urb);
|
|
spin_lock_irqsave(&ps->lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
}
|
|
|
|
static void destroy_async_on_interface(struct usb_dev_state *ps,
|
|
unsigned int ifnum)
|
|
{
|
|
struct list_head *p, *q, hitlist;
|
|
unsigned long flags;
|
|
|
|
INIT_LIST_HEAD(&hitlist);
|
|
spin_lock_irqsave(&ps->lock, flags);
|
|
list_for_each_safe(p, q, &ps->async_pending)
|
|
if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
|
|
list_move_tail(p, &hitlist);
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
destroy_async(ps, &hitlist);
|
|
}
|
|
|
|
static void destroy_all_async(struct usb_dev_state *ps)
|
|
{
|
|
destroy_async(ps, &ps->async_pending);
|
|
}
|
|
|
|
/*
|
|
* interface claims are made only at the request of user level code,
|
|
* which can also release them (explicitly or by closing files).
|
|
* they're also undone when devices disconnect.
|
|
*/
|
|
|
|
static int driver_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void driver_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct usb_dev_state *ps = usb_get_intfdata(intf);
|
|
unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
|
|
|
|
if (!ps)
|
|
return;
|
|
|
|
/* NOTE: this relies on usbcore having canceled and completed
|
|
* all pending I/O requests; 2.6 does that.
|
|
*/
|
|
|
|
if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
|
|
clear_bit(ifnum, &ps->ifclaimed);
|
|
else
|
|
dev_warn(&intf->dev, "interface number %u out of range\n",
|
|
ifnum);
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
/* force async requests to complete */
|
|
destroy_async_on_interface(ps, ifnum);
|
|
}
|
|
|
|
/* The following routines are merely placeholders. There is no way
|
|
* to inform a user task about suspend or resumes.
|
|
*/
|
|
static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int driver_resume(struct usb_interface *intf)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct usb_driver usbfs_driver = {
|
|
.name = "usbfs",
|
|
.probe = driver_probe,
|
|
.disconnect = driver_disconnect,
|
|
.suspend = driver_suspend,
|
|
.resume = driver_resume,
|
|
};
|
|
|
|
static int claimintf(struct usb_dev_state *ps, unsigned int ifnum)
|
|
{
|
|
struct usb_device *dev = ps->dev;
|
|
struct usb_interface *intf;
|
|
int err;
|
|
|
|
if (ifnum >= 8*sizeof(ps->ifclaimed))
|
|
return -EINVAL;
|
|
/* already claimed */
|
|
if (test_bit(ifnum, &ps->ifclaimed))
|
|
return 0;
|
|
|
|
if (ps->privileges_dropped &&
|
|
!test_bit(ifnum, &ps->interface_allowed_mask))
|
|
return -EACCES;
|
|
|
|
intf = usb_ifnum_to_if(dev, ifnum);
|
|
if (!intf)
|
|
err = -ENOENT;
|
|
else
|
|
err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
|
|
if (err == 0)
|
|
set_bit(ifnum, &ps->ifclaimed);
|
|
return err;
|
|
}
|
|
|
|
static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum)
|
|
{
|
|
struct usb_device *dev;
|
|
struct usb_interface *intf;
|
|
int err;
|
|
|
|
err = -EINVAL;
|
|
if (ifnum >= 8*sizeof(ps->ifclaimed))
|
|
return err;
|
|
dev = ps->dev;
|
|
intf = usb_ifnum_to_if(dev, ifnum);
|
|
if (!intf)
|
|
err = -ENOENT;
|
|
else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
|
|
usb_driver_release_interface(&usbfs_driver, intf);
|
|
err = 0;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int checkintf(struct usb_dev_state *ps, unsigned int ifnum)
|
|
{
|
|
if (ps->dev->state != USB_STATE_CONFIGURED)
|
|
return -EHOSTUNREACH;
|
|
if (ifnum >= 8*sizeof(ps->ifclaimed))
|
|
return -EINVAL;
|
|
if (test_bit(ifnum, &ps->ifclaimed))
|
|
return 0;
|
|
/* if not yet claimed, claim it for the driver */
|
|
dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
|
|
"interface %u before use\n", task_pid_nr(current),
|
|
current->comm, ifnum);
|
|
return claimintf(ps, ifnum);
|
|
}
|
|
|
|
static int findintfep(struct usb_device *dev, unsigned int ep)
|
|
{
|
|
unsigned int i, j, e;
|
|
struct usb_interface *intf;
|
|
struct usb_host_interface *alts;
|
|
struct usb_endpoint_descriptor *endpt;
|
|
|
|
if (ep & ~(USB_DIR_IN|0xf))
|
|
return -EINVAL;
|
|
if (!dev->actconfig)
|
|
return -ESRCH;
|
|
for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
|
|
intf = dev->actconfig->interface[i];
|
|
for (j = 0; j < intf->num_altsetting; j++) {
|
|
alts = &intf->altsetting[j];
|
|
for (e = 0; e < alts->desc.bNumEndpoints; e++) {
|
|
endpt = &alts->endpoint[e].desc;
|
|
if (endpt->bEndpointAddress == ep)
|
|
return alts->desc.bInterfaceNumber;
|
|
}
|
|
}
|
|
}
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype,
|
|
unsigned int request, unsigned int index)
|
|
{
|
|
int ret = 0;
|
|
struct usb_host_interface *alt_setting;
|
|
|
|
if (ps->dev->state != USB_STATE_UNAUTHENTICATED
|
|
&& ps->dev->state != USB_STATE_ADDRESS
|
|
&& ps->dev->state != USB_STATE_CONFIGURED)
|
|
return -EHOSTUNREACH;
|
|
if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
|
|
return 0;
|
|
|
|
/*
|
|
* check for the special corner case 'get_device_id' in the printer
|
|
* class specification, which we always want to allow as it is used
|
|
* to query things like ink level, etc.
|
|
*/
|
|
if (requesttype == 0xa1 && request == 0) {
|
|
alt_setting = usb_find_alt_setting(ps->dev->actconfig,
|
|
index >> 8, index & 0xff);
|
|
if (alt_setting
|
|
&& alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
|
|
return 0;
|
|
}
|
|
|
|
index &= 0xff;
|
|
switch (requesttype & USB_RECIP_MASK) {
|
|
case USB_RECIP_ENDPOINT:
|
|
if ((index & ~USB_DIR_IN) == 0)
|
|
return 0;
|
|
ret = findintfep(ps->dev, index);
|
|
if (ret < 0) {
|
|
/*
|
|
* Some not fully compliant Win apps seem to get
|
|
* index wrong and have the endpoint number here
|
|
* rather than the endpoint address (with the
|
|
* correct direction). Win does let this through,
|
|
* so we'll not reject it here but leave it to
|
|
* the device to not break KVM. But we warn.
|
|
*/
|
|
ret = findintfep(ps->dev, index ^ 0x80);
|
|
if (ret >= 0)
|
|
dev_info(&ps->dev->dev,
|
|
"%s: process %i (%s) requesting ep %02x but needs %02x\n",
|
|
__func__, task_pid_nr(current),
|
|
current->comm, index, index ^ 0x80);
|
|
}
|
|
if (ret >= 0)
|
|
ret = checkintf(ps, ret);
|
|
break;
|
|
|
|
case USB_RECIP_INTERFACE:
|
|
ret = checkintf(ps, index);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev,
|
|
unsigned char ep)
|
|
{
|
|
if (ep & USB_ENDPOINT_DIR_MASK)
|
|
return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK];
|
|
else
|
|
return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK];
|
|
}
|
|
|
|
static int parse_usbdevfs_streams(struct usb_dev_state *ps,
|
|
struct usbdevfs_streams __user *streams,
|
|
unsigned int *num_streams_ret,
|
|
unsigned int *num_eps_ret,
|
|
struct usb_host_endpoint ***eps_ret,
|
|
struct usb_interface **intf_ret)
|
|
{
|
|
unsigned int i, num_streams, num_eps;
|
|
struct usb_host_endpoint **eps;
|
|
struct usb_interface *intf = NULL;
|
|
unsigned char ep;
|
|
int ifnum, ret;
|
|
|
|
if (get_user(num_streams, &streams->num_streams) ||
|
|
get_user(num_eps, &streams->num_eps))
|
|
return -EFAULT;
|
|
|
|
if (num_eps < 1 || num_eps > USB_MAXENDPOINTS)
|
|
return -EINVAL;
|
|
|
|
/* The XHCI controller allows max 2 ^ 16 streams */
|
|
if (num_streams_ret && (num_streams < 2 || num_streams > 65536))
|
|
return -EINVAL;
|
|
|
|
eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL);
|
|
if (!eps)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < num_eps; i++) {
|
|
if (get_user(ep, &streams->eps[i])) {
|
|
ret = -EFAULT;
|
|
goto error;
|
|
}
|
|
eps[i] = ep_to_host_endpoint(ps->dev, ep);
|
|
if (!eps[i]) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
/* usb_alloc/free_streams operate on an usb_interface */
|
|
ifnum = findintfep(ps->dev, ep);
|
|
if (ifnum < 0) {
|
|
ret = ifnum;
|
|
goto error;
|
|
}
|
|
|
|
if (i == 0) {
|
|
ret = checkintf(ps, ifnum);
|
|
if (ret < 0)
|
|
goto error;
|
|
intf = usb_ifnum_to_if(ps->dev, ifnum);
|
|
} else {
|
|
/* Verify all eps belong to the same interface */
|
|
if (ifnum != intf->altsetting->desc.bInterfaceNumber) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (num_streams_ret)
|
|
*num_streams_ret = num_streams;
|
|
*num_eps_ret = num_eps;
|
|
*eps_ret = eps;
|
|
*intf_ret = intf;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
kfree(eps);
|
|
return ret;
|
|
}
|
|
|
|
static int match_devt(struct device *dev, void *data)
|
|
{
|
|
return dev->devt == (dev_t) (unsigned long) data;
|
|
}
|
|
|
|
static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
|
|
{
|
|
struct device *dev;
|
|
|
|
dev = bus_find_device(&usb_bus_type, NULL,
|
|
(void *) (unsigned long) devt, match_devt);
|
|
if (!dev)
|
|
return NULL;
|
|
return to_usb_device(dev);
|
|
}
|
|
|
|
/*
|
|
* file operations
|
|
*/
|
|
static int usbdev_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct usb_device *dev = NULL;
|
|
struct usb_dev_state *ps;
|
|
int ret;
|
|
|
|
ret = -ENOMEM;
|
|
ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL);
|
|
if (!ps)
|
|
goto out_free_ps;
|
|
|
|
ret = -ENODEV;
|
|
|
|
/* Protect against simultaneous removal or release */
|
|
mutex_lock(&usbfs_mutex);
|
|
|
|
/* usbdev device-node */
|
|
if (imajor(inode) == USB_DEVICE_MAJOR)
|
|
dev = usbdev_lookup_by_devt(inode->i_rdev);
|
|
|
|
mutex_unlock(&usbfs_mutex);
|
|
|
|
if (!dev)
|
|
goto out_free_ps;
|
|
|
|
usb_lock_device(dev);
|
|
if (dev->state == USB_STATE_NOTATTACHED)
|
|
goto out_unlock_device;
|
|
|
|
ret = usb_autoresume_device(dev);
|
|
if (ret)
|
|
goto out_unlock_device;
|
|
|
|
ps->dev = dev;
|
|
ps->file = file;
|
|
ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */
|
|
spin_lock_init(&ps->lock);
|
|
INIT_LIST_HEAD(&ps->list);
|
|
INIT_LIST_HEAD(&ps->async_pending);
|
|
INIT_LIST_HEAD(&ps->async_completed);
|
|
INIT_LIST_HEAD(&ps->memory_list);
|
|
init_waitqueue_head(&ps->wait);
|
|
ps->disc_pid = get_pid(task_pid(current));
|
|
ps->cred = get_current_cred();
|
|
security_task_getsecid(current, &ps->secid);
|
|
smp_wmb();
|
|
list_add_tail(&ps->list, &dev->filelist);
|
|
file->private_data = ps;
|
|
usb_unlock_device(dev);
|
|
snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
|
|
current->comm);
|
|
return ret;
|
|
|
|
out_unlock_device:
|
|
usb_unlock_device(dev);
|
|
usb_put_dev(dev);
|
|
out_free_ps:
|
|
kfree(ps);
|
|
return ret;
|
|
}
|
|
|
|
static int usbdev_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct usb_dev_state *ps = file->private_data;
|
|
struct usb_device *dev = ps->dev;
|
|
unsigned int ifnum;
|
|
struct async *as;
|
|
|
|
usb_lock_device(dev);
|
|
usb_hub_release_all_ports(dev, ps);
|
|
|
|
list_del_init(&ps->list);
|
|
|
|
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);
|
|
put_cred(ps->cred);
|
|
|
|
as = async_getcompleted(ps);
|
|
while (as) {
|
|
free_async(as);
|
|
as = async_getcompleted(ps);
|
|
}
|
|
|
|
kfree(ps);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_control(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usb_device *dev = ps->dev;
|
|
struct usbdevfs_ctrltransfer ctrl;
|
|
unsigned int tmo;
|
|
unsigned char *tbuf;
|
|
unsigned wLength;
|
|
int i, pipe, ret;
|
|
|
|
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
|
|
return -EFAULT;
|
|
ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
|
|
ctrl.wIndex);
|
|
if (ret)
|
|
return ret;
|
|
wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
|
|
if (wLength > PAGE_SIZE)
|
|
return -EINVAL;
|
|
ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
|
|
sizeof(struct usb_ctrlrequest));
|
|
if (ret)
|
|
return ret;
|
|
tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
|
|
if (!tbuf) {
|
|
ret = -ENOMEM;
|
|
goto done;
|
|
}
|
|
tmo = ctrl.timeout;
|
|
snoop(&dev->dev, "control urb: bRequestType=%02x "
|
|
"bRequest=%02x wValue=%04x "
|
|
"wIndex=%04x wLength=%04x\n",
|
|
ctrl.bRequestType, ctrl.bRequest, ctrl.wValue,
|
|
ctrl.wIndex, ctrl.wLength);
|
|
if (ctrl.bRequestType & 0x80) {
|
|
if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
|
|
ctrl.wLength)) {
|
|
ret = -EINVAL;
|
|
goto done;
|
|
}
|
|
pipe = usb_rcvctrlpipe(dev, 0);
|
|
snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
|
|
|
|
usb_unlock_device(dev);
|
|
i = usb_control_msg(dev, pipe, ctrl.bRequest,
|
|
ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
|
|
tbuf, ctrl.wLength, tmo);
|
|
usb_lock_device(dev);
|
|
snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
|
|
tbuf, max(i, 0));
|
|
if ((i > 0) && ctrl.wLength) {
|
|
if (copy_to_user(ctrl.data, tbuf, i)) {
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
} else {
|
|
if (ctrl.wLength) {
|
|
if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
pipe = usb_sndctrlpipe(dev, 0);
|
|
snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
|
|
tbuf, ctrl.wLength);
|
|
|
|
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);
|
|
snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
|
|
}
|
|
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);
|
|
}
|
|
ret = i;
|
|
done:
|
|
free_page((unsigned long) tbuf);
|
|
usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
|
|
sizeof(struct usb_ctrlrequest));
|
|
return ret;
|
|
}
|
|
|
|
static int proc_bulk(struct usb_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, ret;
|
|
|
|
if (copy_from_user(&bulk, arg, sizeof(bulk)))
|
|
return -EFAULT;
|
|
ret = findintfep(ps->dev, bulk.ep);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = checkintf(ps, ret);
|
|
if (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 >= (INT_MAX - sizeof(struct urb)))
|
|
return -EINVAL;
|
|
ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
|
|
if (ret)
|
|
return ret;
|
|
tbuf = kmalloc(len1, GFP_KERNEL);
|
|
if (!tbuf) {
|
|
ret = -ENOMEM;
|
|
goto done;
|
|
}
|
|
tmo = bulk.timeout;
|
|
if (bulk.ep & 0x80) {
|
|
if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
|
|
ret = -EINVAL;
|
|
goto done;
|
|
}
|
|
snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
|
|
|
|
usb_unlock_device(dev);
|
|
i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
|
|
usb_lock_device(dev);
|
|
snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
|
|
|
|
if (!i && len2) {
|
|
if (copy_to_user(bulk.data, tbuf, len2)) {
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
} else {
|
|
if (len1) {
|
|
if (copy_from_user(tbuf, bulk.data, len1)) {
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
|
|
|
|
usb_unlock_device(dev);
|
|
i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
|
|
usb_lock_device(dev);
|
|
snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
|
|
}
|
|
ret = (i < 0 ? i : len2);
|
|
done:
|
|
kfree(tbuf);
|
|
usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
|
|
return ret;
|
|
}
|
|
|
|
static void check_reset_of_active_ep(struct usb_device *udev,
|
|
unsigned int epnum, char *ioctl_name)
|
|
{
|
|
struct usb_host_endpoint **eps;
|
|
struct usb_host_endpoint *ep;
|
|
|
|
eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out;
|
|
ep = eps[epnum & 0x0f];
|
|
if (ep && !list_empty(&ep->urb_list))
|
|
dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
|
|
task_pid_nr(current), current->comm,
|
|
ioctl_name, epnum);
|
|
}
|
|
|
|
static int proc_resetep(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ep;
|
|
int ret;
|
|
|
|
if (get_user(ep, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
ret = findintfep(ps->dev, ep);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = checkintf(ps, ret);
|
|
if (ret)
|
|
return ret;
|
|
check_reset_of_active_ep(ps->dev, ep, "RESETEP");
|
|
usb_reset_endpoint(ps->dev, ep);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ep;
|
|
int pipe;
|
|
int ret;
|
|
|
|
if (get_user(ep, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
ret = findintfep(ps->dev, ep);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = checkintf(ps, ret);
|
|
if (ret)
|
|
return ret;
|
|
check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT");
|
|
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 usb_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 {
|
|
strlcpy(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 usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_connectinfo ci;
|
|
|
|
memset(&ci, 0, sizeof(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 usb_dev_state *ps)
|
|
{
|
|
struct usb_host_config *actconfig = ps->dev->actconfig;
|
|
struct usb_interface *interface;
|
|
int i, number;
|
|
|
|
/* Don't allow a device reset if the process has dropped the
|
|
* privilege to do such things and any of the interfaces are
|
|
* currently claimed.
|
|
*/
|
|
if (ps->privileges_dropped && actconfig) {
|
|
for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
|
|
interface = actconfig->interface[i];
|
|
number = interface->cur_altsetting->desc.bInterfaceNumber;
|
|
if (usb_interface_claimed(interface) &&
|
|
!test_bit(number, &ps->ifclaimed)) {
|
|
dev_warn(&ps->dev->dev,
|
|
"usbfs: interface %d claimed by %s while '%s' resets device\n",
|
|
number, interface->dev.driver->name, current->comm);
|
|
return -EACCES;
|
|
}
|
|
}
|
|
}
|
|
|
|
return usb_reset_device(ps->dev);
|
|
}
|
|
|
|
static int proc_setintf(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_setinterface setintf;
|
|
int ret;
|
|
|
|
if (copy_from_user(&setintf, arg, sizeof(setintf)))
|
|
return -EFAULT;
|
|
ret = checkintf(ps, setintf.interface);
|
|
if (ret)
|
|
return ret;
|
|
|
|
destroy_async_on_interface(ps, setintf.interface);
|
|
|
|
return usb_set_interface(ps->dev, setintf.interface,
|
|
setintf.altsetting);
|
|
}
|
|
|
|
static int proc_setconfig(struct usb_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 struct usb_memory *
|
|
find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb)
|
|
{
|
|
struct usb_memory *usbm = NULL, *iter;
|
|
unsigned long flags;
|
|
unsigned long uurb_start = (unsigned long)uurb->buffer;
|
|
|
|
spin_lock_irqsave(&ps->lock, flags);
|
|
list_for_each_entry(iter, &ps->memory_list, memlist) {
|
|
if (uurb_start >= iter->vm_start &&
|
|
uurb_start < iter->vm_start + iter->size) {
|
|
if (uurb->buffer_length > iter->vm_start + iter->size -
|
|
uurb_start) {
|
|
usbm = ERR_PTR(-EINVAL);
|
|
} else {
|
|
usbm = iter;
|
|
usbm->urb_use_count++;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
return usbm;
|
|
}
|
|
|
|
static int proc_do_submiturb(struct usb_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 = NULL;
|
|
struct usb_ctrlrequest *dr = NULL;
|
|
unsigned int u, totlen, isofrmlen;
|
|
int i, ret, is_in, num_sgs = 0, ifnum = -1;
|
|
int number_of_packets = 0;
|
|
unsigned int stream_id = 0;
|
|
void *buf;
|
|
|
|
if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
|
|
USBDEVFS_URB_SHORT_NOT_OK |
|
|
USBDEVFS_URB_BULK_CONTINUATION |
|
|
USBDEVFS_URB_NO_FSBR |
|
|
USBDEVFS_URB_ZERO_PACKET |
|
|
USBDEVFS_URB_NO_INTERRUPT))
|
|
return -EINVAL;
|
|
if (uurb->buffer_length > 0 && !uurb->buffer)
|
|
return -EINVAL;
|
|
if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
|
|
(uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
|
|
ifnum = findintfep(ps->dev, uurb->endpoint);
|
|
if (ifnum < 0)
|
|
return ifnum;
|
|
ret = checkintf(ps, ifnum);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
ep = ep_to_host_endpoint(ps->dev, uurb->endpoint);
|
|
if (!ep)
|
|
return -ENOENT;
|
|
is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0;
|
|
|
|
u = 0;
|
|
switch (uurb->type) {
|
|
case USBDEVFS_URB_TYPE_CONTROL:
|
|
if (!usb_endpoint_xfer_control(&ep->desc))
|
|
return -EINVAL;
|
|
/* min 8 byte setup packet */
|
|
if (uurb->buffer_length < 8)
|
|
return -EINVAL;
|
|
dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
if (copy_from_user(dr, uurb->buffer, 8)) {
|
|
ret = -EFAULT;
|
|
goto error;
|
|
}
|
|
if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
|
|
le16_to_cpup(&dr->wIndex));
|
|
if (ret)
|
|
goto error;
|
|
uurb->buffer_length = le16_to_cpup(&dr->wLength);
|
|
uurb->buffer += 8;
|
|
if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
|
|
is_in = 1;
|
|
uurb->endpoint |= USB_DIR_IN;
|
|
} else {
|
|
is_in = 0;
|
|
uurb->endpoint &= ~USB_DIR_IN;
|
|
}
|
|
snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
|
|
"bRequest=%02x wValue=%04x "
|
|
"wIndex=%04x wLength=%04x\n",
|
|
dr->bRequestType, dr->bRequest,
|
|
__le16_to_cpup(&dr->wValue),
|
|
__le16_to_cpup(&dr->wIndex),
|
|
__le16_to_cpup(&dr->wLength));
|
|
u = sizeof(struct usb_ctrlrequest);
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_BULK:
|
|
switch (usb_endpoint_type(&ep->desc)) {
|
|
case USB_ENDPOINT_XFER_CONTROL:
|
|
case USB_ENDPOINT_XFER_ISOC:
|
|
return -EINVAL;
|
|
case USB_ENDPOINT_XFER_INT:
|
|
/* allow single-shot interrupt transfers */
|
|
uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
|
|
goto interrupt_urb;
|
|
}
|
|
num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
|
|
if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
|
|
num_sgs = 0;
|
|
if (ep->streams)
|
|
stream_id = uurb->stream_id;
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_INTERRUPT:
|
|
if (!usb_endpoint_xfer_int(&ep->desc))
|
|
return -EINVAL;
|
|
interrupt_urb:
|
|
break;
|
|
|
|
case USBDEVFS_URB_TYPE_ISO:
|
|
/* arbitrary limit */
|
|
if (uurb->number_of_packets < 1 ||
|
|
uurb->number_of_packets > 128)
|
|
return -EINVAL;
|
|
if (!usb_endpoint_xfer_isoc(&ep->desc))
|
|
return -EINVAL;
|
|
number_of_packets = uurb->number_of_packets;
|
|
isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
|
|
number_of_packets;
|
|
isopkt = memdup_user(iso_frame_desc, isofrmlen);
|
|
if (IS_ERR(isopkt)) {
|
|
ret = PTR_ERR(isopkt);
|
|
isopkt = NULL;
|
|
goto error;
|
|
}
|
|
for (totlen = u = 0; u < number_of_packets; u++) {
|
|
/*
|
|
* arbitrary limit need for USB 3.0
|
|
* bMaxBurst (0~15 allowed, 1~16 packets)
|
|
* bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
|
|
* sizemax: 1024 * 16 * 3 = 49152
|
|
*/
|
|
if (isopkt[u].length > 49152) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
totlen += isopkt[u].length;
|
|
}
|
|
u *= sizeof(struct usb_iso_packet_descriptor);
|
|
uurb->buffer_length = totlen;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (uurb->buffer_length > 0 &&
|
|
!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
|
|
uurb->buffer, uurb->buffer_length)) {
|
|
ret = -EFAULT;
|
|
goto error;
|
|
}
|
|
as = alloc_async(number_of_packets);
|
|
if (!as) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
as->usbm = find_memory_area(ps, uurb);
|
|
if (IS_ERR(as->usbm)) {
|
|
ret = PTR_ERR(as->usbm);
|
|
as->usbm = NULL;
|
|
goto error;
|
|
}
|
|
|
|
/* do not use SG buffers when memory mapped segments
|
|
* are in use
|
|
*/
|
|
if (as->usbm)
|
|
num_sgs = 0;
|
|
|
|
u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
|
|
num_sgs * sizeof(struct scatterlist);
|
|
ret = usbfs_increase_memory_usage(u);
|
|
if (ret)
|
|
goto error;
|
|
as->mem_usage = u;
|
|
|
|
if (num_sgs) {
|
|
as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist),
|
|
GFP_KERNEL);
|
|
if (!as->urb->sg) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
as->urb->num_sgs = num_sgs;
|
|
sg_init_table(as->urb->sg, as->urb->num_sgs);
|
|
|
|
totlen = uurb->buffer_length;
|
|
for (i = 0; i < as->urb->num_sgs; i++) {
|
|
u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen;
|
|
buf = kmalloc(u, GFP_KERNEL);
|
|
if (!buf) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
sg_set_buf(&as->urb->sg[i], buf, u);
|
|
|
|
if (!is_in) {
|
|
if (copy_from_user(buf, uurb->buffer, u)) {
|
|
ret = -EFAULT;
|
|
goto error;
|
|
}
|
|
uurb->buffer += u;
|
|
}
|
|
totlen -= u;
|
|
}
|
|
} else if (uurb->buffer_length > 0) {
|
|
if (as->usbm) {
|
|
unsigned long uurb_start = (unsigned long)uurb->buffer;
|
|
|
|
as->urb->transfer_buffer = as->usbm->mem +
|
|
(uurb_start - as->usbm->vm_start);
|
|
} else {
|
|
as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
|
|
GFP_KERNEL);
|
|
if (!as->urb->transfer_buffer) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
if (!is_in) {
|
|
if (copy_from_user(as->urb->transfer_buffer,
|
|
uurb->buffer,
|
|
uurb->buffer_length)) {
|
|
ret = -EFAULT;
|
|
goto error;
|
|
}
|
|
} else if (uurb->type == USBDEVFS_URB_TYPE_ISO) {
|
|
/*
|
|
* Isochronous input data may end up being
|
|
* discontiguous if some of the packets are
|
|
* short. Clear the buffer so that the gaps
|
|
* don't leak kernel data to userspace.
|
|
*/
|
|
memset(as->urb->transfer_buffer, 0,
|
|
uurb->buffer_length);
|
|
}
|
|
}
|
|
}
|
|
as->urb->dev = ps->dev;
|
|
as->urb->pipe = (uurb->type << 30) |
|
|
__create_pipe(ps->dev, uurb->endpoint & 0xf) |
|
|
(uurb->endpoint & USB_DIR_IN);
|
|
|
|
/* This tedious sequence is necessary because the URB_* flags
|
|
* are internal to the kernel and subject to change, whereas
|
|
* the USBDEVFS_URB_* flags are a user API and must not be changed.
|
|
*/
|
|
u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
|
|
if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
|
|
u |= URB_ISO_ASAP;
|
|
if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in)
|
|
u |= URB_SHORT_NOT_OK;
|
|
if (uurb->flags & USBDEVFS_URB_NO_FSBR)
|
|
u |= URB_NO_FSBR;
|
|
if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
|
|
u |= URB_ZERO_PACKET;
|
|
if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
|
|
u |= URB_NO_INTERRUPT;
|
|
as->urb->transfer_flags = u;
|
|
|
|
as->urb->transfer_buffer_length = uurb->buffer_length;
|
|
as->urb->setup_packet = (unsigned char *)dr;
|
|
dr = NULL;
|
|
as->urb->start_frame = uurb->start_frame;
|
|
as->urb->number_of_packets = number_of_packets;
|
|
as->urb->stream_id = stream_id;
|
|
|
|
if (ep->desc.bInterval) {
|
|
if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
|
|
ps->dev->speed == USB_SPEED_HIGH ||
|
|
ps->dev->speed >= USB_SPEED_SUPER)
|
|
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 < 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);
|
|
isopkt = NULL;
|
|
as->ps = ps;
|
|
as->userurb = arg;
|
|
if (as->usbm) {
|
|
unsigned long uurb_start = (unsigned long)uurb->buffer;
|
|
|
|
as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
as->urb->transfer_dma = as->usbm->dma_handle +
|
|
(uurb_start - as->usbm->vm_start);
|
|
} else if (is_in && uurb->buffer_length > 0)
|
|
as->userbuffer = uurb->buffer;
|
|
as->signr = uurb->signr;
|
|
as->ifnum = ifnum;
|
|
as->pid = get_pid(task_pid(current));
|
|
as->cred = get_current_cred();
|
|
security_task_getsecid(current, &as->secid);
|
|
snoop_urb(ps->dev, as->userurb, as->urb->pipe,
|
|
as->urb->transfer_buffer_length, 0, SUBMIT,
|
|
NULL, 0);
|
|
if (!is_in)
|
|
snoop_urb_data(as->urb, as->urb->transfer_buffer_length);
|
|
|
|
async_newpending(as);
|
|
|
|
if (usb_endpoint_xfer_bulk(&ep->desc)) {
|
|
spin_lock_irq(&ps->lock);
|
|
|
|
/* Not exactly the endpoint address; the direction bit is
|
|
* shifted to the 0x10 position so that the value will be
|
|
* between 0 and 31.
|
|
*/
|
|
as->bulk_addr = usb_endpoint_num(&ep->desc) |
|
|
((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
|
|
>> 3);
|
|
|
|
/* If this bulk URB is the start of a new transfer, re-enable
|
|
* the endpoint. Otherwise mark it as a continuation URB.
|
|
*/
|
|
if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
|
|
as->bulk_status = AS_CONTINUATION;
|
|
else
|
|
ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
|
|
|
|
/* Don't accept continuation URBs if the endpoint is
|
|
* disabled because of an earlier error.
|
|
*/
|
|
if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
|
|
ret = -EREMOTEIO;
|
|
else
|
|
ret = usb_submit_urb(as->urb, GFP_ATOMIC);
|
|
spin_unlock_irq(&ps->lock);
|
|
} else {
|
|
ret = usb_submit_urb(as->urb, GFP_KERNEL);
|
|
}
|
|
|
|
if (ret) {
|
|
dev_printk(KERN_DEBUG, &ps->dev->dev,
|
|
"usbfs: usb_submit_urb returned %d\n", ret);
|
|
snoop_urb(ps->dev, as->userurb, as->urb->pipe,
|
|
0, ret, COMPLETE, NULL, 0);
|
|
async_removepending(as);
|
|
goto error;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
if (as && as->usbm)
|
|
dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count);
|
|
kfree(isopkt);
|
|
kfree(dr);
|
|
if (as)
|
|
free_async(as);
|
|
return ret;
|
|
}
|
|
|
|
static int proc_submiturb(struct usb_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 usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct urb *urb;
|
|
struct async *as;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ps->lock, flags);
|
|
as = async_getpending(ps, arg);
|
|
if (!as) {
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
urb = as->urb;
|
|
usb_get_urb(urb);
|
|
spin_unlock_irqrestore(&ps->lock, flags);
|
|
|
|
usb_kill_urb(urb);
|
|
usb_put_urb(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 && urb->actual_length) {
|
|
if (copy_urb_data_to_user(as->userbuffer, urb))
|
|
goto err_out;
|
|
}
|
|
if (put_user(as->status, &userurb->status))
|
|
goto err_out;
|
|
if (put_user(urb->actual_length, &userurb->actual_length))
|
|
goto err_out;
|
|
if (put_user(urb->error_count, &userurb->error_count))
|
|
goto err_out;
|
|
|
|
if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
|
|
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))
|
|
goto err_out;
|
|
if (put_user(urb->iso_frame_desc[i].status,
|
|
&userurb->iso_frame_desc[i].status))
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
if (put_user(addr, (void __user * __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
err_out:
|
|
return -EFAULT;
|
|
}
|
|
|
|
static struct async *reap_as(struct usb_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);
|
|
as = async_getcompleted(ps);
|
|
if (as || !connected(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 usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as = reap_as(ps);
|
|
|
|
if (as) {
|
|
int retval;
|
|
|
|
snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
|
|
retval = processcompl(as, (void __user * __user *)arg);
|
|
free_async(as);
|
|
return retval;
|
|
}
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
int retval;
|
|
struct async *as;
|
|
|
|
as = async_getcompleted(ps);
|
|
if (as) {
|
|
snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
|
|
retval = processcompl(as, (void __user * __user *)arg);
|
|
free_async(as);
|
|
} else {
|
|
retval = (connected(ps) ? -EAGAIN : -ENODEV);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static int proc_control_compat(struct usb_dev_state *ps,
|
|
struct usbdevfs_ctrltransfer32 __user *p32)
|
|
{
|
|
struct usbdevfs_ctrltransfer __user *p;
|
|
__u32 udata;
|
|
p = compat_alloc_user_space(sizeof(*p));
|
|
if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
|
|
get_user(udata, &p32->data) ||
|
|
put_user(compat_ptr(udata), &p->data))
|
|
return -EFAULT;
|
|
return proc_control(ps, p);
|
|
}
|
|
|
|
static int proc_bulk_compat(struct usb_dev_state *ps,
|
|
struct usbdevfs_bulktransfer32 __user *p32)
|
|
{
|
|
struct usbdevfs_bulktransfer __user *p;
|
|
compat_uint_t n;
|
|
compat_caddr_t addr;
|
|
|
|
p = compat_alloc_user_space(sizeof(*p));
|
|
|
|
if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
|
|
get_user(n, &p32->len) || put_user(n, &p->len) ||
|
|
get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
|
|
get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
|
|
return -EFAULT;
|
|
|
|
return proc_bulk(ps, p);
|
|
}
|
|
static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_disconnectsignal32 ds;
|
|
|
|
if (copy_from_user(&ds, arg, sizeof(ds)))
|
|
return -EFAULT;
|
|
ps->discsignr = ds.signr;
|
|
ps->disccontext = compat_ptr(ds.context);
|
|
return 0;
|
|
}
|
|
|
|
static int get_urb32(struct usbdevfs_urb *kurb,
|
|
struct usbdevfs_urb32 __user *uurb)
|
|
{
|
|
__u32 uptr;
|
|
if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
|
|
__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->usercontext))
|
|
return -EFAULT;
|
|
kurb->usercontext = compat_ptr(uptr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int proc_submiturb_compat(struct usb_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 && urb->actual_length) {
|
|
if (copy_urb_data_to_user(as->userbuffer, urb))
|
|
return -EFAULT;
|
|
}
|
|
if (put_user(as->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_endpoint_xfer_isoc(&urb->ep->desc)) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct async *as = reap_as(ps);
|
|
|
|
if (as) {
|
|
int retval;
|
|
|
|
snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
|
|
retval = processcompl_compat(as, (void __user * __user *)arg);
|
|
free_async(as);
|
|
return retval;
|
|
}
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
int retval;
|
|
struct async *as;
|
|
|
|
as = async_getcompleted(ps);
|
|
if (as) {
|
|
snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
|
|
retval = processcompl_compat(as, (void __user * __user *)arg);
|
|
free_async(as);
|
|
} else {
|
|
retval = (connected(ps) ? -EAGAIN : -ENODEV);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_disconnectsignal ds;
|
|
|
|
if (copy_from_user(&ds, arg, sizeof(ds)))
|
|
return -EFAULT;
|
|
ps->discsignr = ds.signr;
|
|
ps->disccontext = ds.context;
|
|
return 0;
|
|
}
|
|
|
|
static int proc_claiminterface(struct usb_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 usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned int ifnum;
|
|
int ret;
|
|
|
|
if (get_user(ifnum, (unsigned int __user *)arg))
|
|
return -EFAULT;
|
|
ret = releaseintf(ps, ifnum);
|
|
if (ret < 0)
|
|
return ret;
|
|
destroy_async_on_interface(ps, ifnum);
|
|
return 0;
|
|
}
|
|
|
|
static int proc_ioctl(struct usb_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;
|
|
|
|
if (ps->privileges_dropped)
|
|
return -EACCES;
|
|
|
|
/* alloc buffer */
|
|
size = _IOC_SIZE(ctl->ioctl_code);
|
|
if (size > 0) {
|
|
buf = kmalloc(size, GFP_KERNEL);
|
|
if (buf == 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:
|
|
if (!intf->dev.driver)
|
|
retval = device_attach(&intf->dev);
|
|
else
|
|
retval = -EBUSY;
|
|
break;
|
|
|
|
/* talk directly to the interface's driver */
|
|
default:
|
|
if (intf->dev.driver)
|
|
driver = to_usb_driver(intf->dev.driver);
|
|
if (driver == NULL || driver->unlocked_ioctl == NULL) {
|
|
retval = -ENOTTY;
|
|
} else {
|
|
retval = driver->unlocked_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 usb_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 usb_dev_state *ps, compat_uptr_t arg)
|
|
{
|
|
struct usbdevfs_ioctl32 __user *uioc;
|
|
struct usbdevfs_ioctl ctrl;
|
|
u32 udata;
|
|
|
|
uioc = compat_ptr((long)arg);
|
|
if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
|
|
__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
|
|
|
|
static int proc_claim_port(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned portnum;
|
|
int rc;
|
|
|
|
if (get_user(portnum, (unsigned __user *) arg))
|
|
return -EFAULT;
|
|
rc = usb_hub_claim_port(ps->dev, portnum, ps);
|
|
if (rc == 0)
|
|
snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
|
|
portnum, task_pid_nr(current), current->comm);
|
|
return rc;
|
|
}
|
|
|
|
static int proc_release_port(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned portnum;
|
|
|
|
if (get_user(portnum, (unsigned __user *) arg))
|
|
return -EFAULT;
|
|
return usb_hub_release_port(ps->dev, portnum, ps);
|
|
}
|
|
|
|
static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
__u32 caps;
|
|
|
|
caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
|
|
USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP |
|
|
USBDEVFS_CAP_DROP_PRIVILEGES;
|
|
if (!ps->dev->bus->no_stop_on_short)
|
|
caps |= USBDEVFS_CAP_BULK_CONTINUATION;
|
|
if (ps->dev->bus->sg_tablesize)
|
|
caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER;
|
|
|
|
if (put_user(caps, (__u32 __user *)arg))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
struct usbdevfs_disconnect_claim dc;
|
|
struct usb_interface *intf;
|
|
|
|
if (copy_from_user(&dc, arg, sizeof(dc)))
|
|
return -EFAULT;
|
|
|
|
intf = usb_ifnum_to_if(ps->dev, dc.interface);
|
|
if (!intf)
|
|
return -EINVAL;
|
|
|
|
if (intf->dev.driver) {
|
|
struct usb_driver *driver = to_usb_driver(intf->dev.driver);
|
|
|
|
if (ps->privileges_dropped)
|
|
return -EACCES;
|
|
|
|
if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
|
|
strncmp(dc.driver, intf->dev.driver->name,
|
|
sizeof(dc.driver)) != 0)
|
|
return -EBUSY;
|
|
|
|
if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
|
|
strncmp(dc.driver, intf->dev.driver->name,
|
|
sizeof(dc.driver)) == 0)
|
|
return -EBUSY;
|
|
|
|
dev_dbg(&intf->dev, "disconnect by usbfs\n");
|
|
usb_driver_release_interface(driver, intf);
|
|
}
|
|
|
|
return claimintf(ps, dc.interface);
|
|
}
|
|
|
|
static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned num_streams, num_eps;
|
|
struct usb_host_endpoint **eps;
|
|
struct usb_interface *intf;
|
|
int r;
|
|
|
|
r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps,
|
|
&eps, &intf);
|
|
if (r)
|
|
return r;
|
|
|
|
destroy_async_on_interface(ps,
|
|
intf->altsetting[0].desc.bInterfaceNumber);
|
|
|
|
r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL);
|
|
kfree(eps);
|
|
return r;
|
|
}
|
|
|
|
static int proc_free_streams(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
unsigned num_eps;
|
|
struct usb_host_endpoint **eps;
|
|
struct usb_interface *intf;
|
|
int r;
|
|
|
|
r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf);
|
|
if (r)
|
|
return r;
|
|
|
|
destroy_async_on_interface(ps,
|
|
intf->altsetting[0].desc.bInterfaceNumber);
|
|
|
|
r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL);
|
|
kfree(eps);
|
|
return r;
|
|
}
|
|
|
|
static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg)
|
|
{
|
|
u32 data;
|
|
|
|
if (copy_from_user(&data, arg, sizeof(data)))
|
|
return -EFAULT;
|
|
|
|
/* This is a one way operation. Once privileges are
|
|
* dropped, you cannot regain them. You may however reissue
|
|
* this ioctl to shrink the allowed interfaces mask.
|
|
*/
|
|
ps->interface_allowed_mask &= data;
|
|
ps->privileges_dropped = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 long usbdev_do_ioctl(struct file *file, unsigned int cmd,
|
|
void __user *p)
|
|
{
|
|
struct usb_dev_state *ps = file->private_data;
|
|
struct inode *inode = file_inode(file);
|
|
struct usb_device *dev = ps->dev;
|
|
int ret = -ENOTTY;
|
|
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EPERM;
|
|
|
|
usb_lock_device(dev);
|
|
|
|
/* Reap operations are allowed even after disconnection */
|
|
switch (cmd) {
|
|
case USBDEVFS_REAPURB:
|
|
snoop(&dev->dev, "%s: REAPURB\n", __func__);
|
|
ret = proc_reapurb(ps, p);
|
|
goto done;
|
|
|
|
case USBDEVFS_REAPURBNDELAY:
|
|
snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
|
|
ret = proc_reapurbnonblock(ps, p);
|
|
goto done;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
case USBDEVFS_REAPURB32:
|
|
snoop(&dev->dev, "%s: REAPURB32\n", __func__);
|
|
ret = proc_reapurb_compat(ps, p);
|
|
goto done;
|
|
|
|
case USBDEVFS_REAPURBNDELAY32:
|
|
snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
|
|
ret = proc_reapurbnonblock_compat(ps, p);
|
|
goto done;
|
|
#endif
|
|
}
|
|
|
|
if (!connected(ps)) {
|
|
usb_unlock_device(dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case USBDEVFS_CONTROL:
|
|
snoop(&dev->dev, "%s: CONTROL\n", __func__);
|
|
ret = proc_control(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_BULK:
|
|
snoop(&dev->dev, "%s: BULK\n", __func__);
|
|
ret = proc_bulk(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_RESETEP:
|
|
snoop(&dev->dev, "%s: RESETEP\n", __func__);
|
|
ret = proc_resetep(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_RESET:
|
|
snoop(&dev->dev, "%s: RESET\n", __func__);
|
|
ret = proc_resetdevice(ps);
|
|
break;
|
|
|
|
case USBDEVFS_CLEAR_HALT:
|
|
snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
|
|
ret = proc_clearhalt(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_GETDRIVER:
|
|
snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
|
|
ret = proc_getdriver(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_CONNECTINFO:
|
|
snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
|
|
ret = proc_connectinfo(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SETINTERFACE:
|
|
snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
|
|
ret = proc_setintf(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SETCONFIGURATION:
|
|
snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
|
|
ret = proc_setconfig(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SUBMITURB:
|
|
snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
|
|
ret = proc_submiturb(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
case USBDEVFS_CONTROL32:
|
|
snoop(&dev->dev, "%s: CONTROL32\n", __func__);
|
|
ret = proc_control_compat(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_BULK32:
|
|
snoop(&dev->dev, "%s: BULK32\n", __func__);
|
|
ret = proc_bulk_compat(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_DISCSIGNAL32:
|
|
snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
|
|
ret = proc_disconnectsignal_compat(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_SUBMITURB32:
|
|
snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
|
|
ret = proc_submiturb_compat(ps, p);
|
|
if (ret >= 0)
|
|
inode->i_mtime = current_time(inode);
|
|
break;
|
|
|
|
case USBDEVFS_IOCTL32:
|
|
snoop(&dev->dev, "%s: IOCTL32\n", __func__);
|
|
ret = proc_ioctl_compat(ps, ptr_to_compat(p));
|
|
break;
|
|
#endif
|
|
|
|
case USBDEVFS_DISCARDURB:
|
|
snoop(&dev->dev, "%s: DISCARDURB %pK\n", __func__, p);
|
|
ret = proc_unlinkurb(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_DISCSIGNAL:
|
|
snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
|
|
ret = proc_disconnectsignal(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_CLAIMINTERFACE:
|
|
snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
|
|
ret = proc_claiminterface(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_RELEASEINTERFACE:
|
|
snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
|
|
ret = proc_releaseinterface(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_IOCTL:
|
|
snoop(&dev->dev, "%s: IOCTL\n", __func__);
|
|
ret = proc_ioctl_default(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_CLAIM_PORT:
|
|
snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
|
|
ret = proc_claim_port(ps, p);
|
|
break;
|
|
|
|
case USBDEVFS_RELEASE_PORT:
|
|
snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
|
|
ret = proc_release_port(ps, p);
|
|
break;
|
|
case USBDEVFS_GET_CAPABILITIES:
|
|
ret = proc_get_capabilities(ps, p);
|
|
break;
|
|
case USBDEVFS_DISCONNECT_CLAIM:
|
|
ret = proc_disconnect_claim(ps, p);
|
|
break;
|
|
case USBDEVFS_ALLOC_STREAMS:
|
|
ret = proc_alloc_streams(ps, p);
|
|
break;
|
|
case USBDEVFS_FREE_STREAMS:
|
|
ret = proc_free_streams(ps, p);
|
|
break;
|
|
case USBDEVFS_DROP_PRIVILEGES:
|
|
ret = proc_drop_privileges(ps, p);
|
|
break;
|
|
case USBDEVFS_GET_SPEED:
|
|
ret = ps->dev->speed;
|
|
break;
|
|
}
|
|
|
|
done:
|
|
usb_unlock_device(dev);
|
|
if (ret >= 0)
|
|
inode->i_atime = current_time(inode);
|
|
return ret;
|
|
}
|
|
|
|
static long usbdev_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int ret;
|
|
|
|
ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int ret;
|
|
|
|
ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/* No kernel lock - fine */
|
|
static unsigned int usbdev_poll(struct file *file,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct usb_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 |= POLLHUP;
|
|
if (list_empty(&ps->list))
|
|
mask |= POLLERR;
|
|
return mask;
|
|
}
|
|
|
|
const struct file_operations usbdev_file_operations = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_seek_end_llseek,
|
|
.read = usbdev_read,
|
|
.poll = usbdev_poll,
|
|
.unlocked_ioctl = usbdev_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = usbdev_compat_ioctl,
|
|
#endif
|
|
.mmap = usbdev_mmap,
|
|
.open = usbdev_open,
|
|
.release = usbdev_release,
|
|
};
|
|
|
|
static void usbdev_remove(struct usb_device *udev)
|
|
{
|
|
struct usb_dev_state *ps;
|
|
struct siginfo sinfo;
|
|
|
|
while (!list_empty(&udev->filelist)) {
|
|
ps = list_entry(udev->filelist.next, struct usb_dev_state, list);
|
|
destroy_all_async(ps);
|
|
wake_up_all(&ps->wait);
|
|
list_del_init(&ps->list);
|
|
if (ps->discsignr) {
|
|
memset(&sinfo, 0, sizeof(sinfo));
|
|
sinfo.si_signo = ps->discsignr;
|
|
sinfo.si_errno = EPIPE;
|
|
sinfo.si_code = SI_ASYNCIO;
|
|
sinfo.si_addr = ps->disccontext;
|
|
kill_pid_info_as_cred(ps->discsignr, &sinfo,
|
|
ps->disc_pid, ps->cred, ps->secid);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int usbdev_notify(struct notifier_block *self,
|
|
unsigned long action, void *dev)
|
|
{
|
|
switch (action) {
|
|
case USB_DEVICE_ADD:
|
|
break;
|
|
case USB_DEVICE_REMOVE:
|
|
usbdev_remove(dev);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block usbdev_nb = {
|
|
.notifier_call = usbdev_notify,
|
|
};
|
|
|
|
static struct cdev usb_device_cdev;
|
|
|
|
int __init usb_devio_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
|
|
"usb_device");
|
|
if (retval) {
|
|
printk(KERN_ERR "Unable to register minors for usb_device\n");
|
|
goto out;
|
|
}
|
|
cdev_init(&usb_device_cdev, &usbdev_file_operations);
|
|
retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
if (retval) {
|
|
printk(KERN_ERR "Unable to get usb_device major %d\n",
|
|
USB_DEVICE_MAJOR);
|
|
goto error_cdev;
|
|
}
|
|
usb_register_notify(&usbdev_nb);
|
|
out:
|
|
return retval;
|
|
|
|
error_cdev:
|
|
unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
goto out;
|
|
}
|
|
|
|
void usb_devio_cleanup(void)
|
|
{
|
|
usb_unregister_notify(&usbdev_nb);
|
|
cdev_del(&usb_device_cdev);
|
|
unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
|
|
}
|