Release 4.11 drivers/usb/core/devio.c

/*****************************************************************************/

/*
 *      devio.c  --  User space communication with USB devices.
 *
 *      Copyright (C) 1999-2000  Thomas Sailer (sailer@ife.ee.ethz.ch)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      This program is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  This file implements the usbfs/x/y files, where
 *  x is the bus number and y the device number.
 *
 *  It allows user space programs/"drivers" to communicate directly
 *  with USB devices without intervening kernel driver.
 *
 *  Revision history
 *    22.12.1999   0.1   Initial release (split from proc_usb.c)
 *    04.01.2000   0.2   Turned into its own filesystem
 *    30.09.2005   0.3   Fix user-triggerable oops in async URB delivery
 *                       (CAN-2005-3055)
 */

/*****************************************************************************/

#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/sched/signal.h>
#include <linux/slab.h>
#include <linux/signal.h>
#include <linux/poll.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/usb.h>
#include <linux/usbdevice_fs.h>
#include <linux/usb/hcd.h>	/* for usbcore internals */
#include <linux/cdev.h>
#include <linux/notifier.h>
#include <linux/security.h>
#include <linux/user_namespace.h>
#include <linux/scatterlist.h>
#include <linux/uaccess.h>
#include <linux/dma-mapping.h>
#include <asm/byteorder.h>
#include <linux/moduleparam.h>

#include "usb.h"


#define USB_MAXBUS			64

#define USB_DEVICE_MAX			(USB_MAXBUS * 128)

#define USB_SG_SIZE			16384 
/* split-size for large txs */

/* Mutual exclusion for removal, open, and release */

DEFINE_MUTEX(usbfs_mutex);


struct usb_dev_state {
	
struct list_head list;      /* state list */
	
struct usb_device *dev;
	
struct file *file;
	
spinlock_t lock;            /* protects the async urb lists */
	
struct list_head async_pending;
	
struct list_head async_completed;
	
struct list_head memory_list;
	
wait_queue_head_t wait;     /* wake up if a request completed */
	
unsigned int discsignr;
	
struct pid *disc_pid;
	
const struct cred *cred;
	
void __user *disccontext;
	
unsigned long ifclaimed;
	
u32 secid;
	
u32 disabled_bulk_eps;
	
bool privileges_dropped;
	
unsigned long interface_allowed_mask;
};


struct usb_memory {
	
struct list_head memlist;
	
int vma_use_count;
	
int urb_use_count;
	
u32 size;
	
void *mem;
	
dma_addr_t dma_handle;
	
unsigned long vm_start;
	
struct usb_dev_state *ps;
};


struct async {
	
struct list_head asynclist;
	
struct usb_dev_state *ps;
	
struct pid *pid;
	
const struct cred *cred;
	
unsigned int signr;
	
unsigned int ifnum;
	
void __user *userbuffer;
	
void __user *userurb;
	
struct urb *urb;
	
struct usb_memory *usbm;
	
unsigned int mem_usage;
	
int status;
	
u32 secid;
	
u8 bulk_addr;
	
u8 bulk_status;
};


static bool usbfs_snoop;
module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");


static unsigned usbfs_snoop_max = 65536;
module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(usbfs_snoop_max,
		"maximum number of bytes to print while snooping");


#define snoop(dev, format, arg...)				\
	do {                                                    \
                if (usbfs_snoop)                                \
                        dev_info(dev, format, ## arg);          \
        } while (0)


enum snoop_when {
	

SUBMIT, COMPLETE
};


#define USB_DEVICE_DEV		MKDEV(USB_DEVICE_MAJOR, 0)

/* Limit on the total amount of memory we can allocate for transfers */

static u32 usbfs_memory_mb = 16;
module_param(usbfs_memory_mb, uint, 0644);
MODULE_PARM_DESC(usbfs_memory_mb,
		"maximum MB allowed for usbfs buffers (0 = no limit)");


static atomic64_t usbfs_memory_usage;	
/* Total memory currently allocated */

/* Check whether it's okay to allocate more memory for a transfer */


static int usbfs_increase_memory_usage(u64 amount)
{
	u64 lim;

	lim = ACCESS_ONCE(usbfs_memory_mb);
	lim <<= 20;

	atomic64_add(amount, &usbfs_memory_usage);

	if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) {
		atomic64_sub(amount, &usbfs_memory_usage);
		return -ENOMEM;
	}

	return 0;
}

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16
25.81%
2
50.00%
Mateusz Berezecki
15
24.19%
1
25.00%
Total
62
100.00%
4
100.00%

/* Memory for a transfer is being deallocated */


static void usbfs_decrease_memory_usage(u64 amount)
{
	atomic64_sub(amount, &usbfs_memory_usage);
}

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15
88.24%
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50.00%
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2
11.76%
1
50.00%
Total
17
100.00%
2
100.00%



static int connected(struct usb_dev_state *ps)
{
	return (!list_empty(&ps->list) &&
			ps->dev->state != USB_STATE_NOTATTACHED);
}

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31
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1
100.00%



static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count)
{
	struct usb_dev_state *ps = usbm->ps;
	unsigned long flags;

	spin_lock_irqsave(&ps->lock, flags);
	--*count;
	if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) {
		list_del(&usbm->memlist);
		spin_unlock_irqrestore(&ps->lock, flags);

		usb_free_coherent(ps->dev, usbm->size, usbm->mem,
				usbm->dma_handle);
		usbfs_decrease_memory_usage(
			usbm->size + sizeof(struct usb_memory));
		kfree(usbm);
	} else {
		spin_unlock_irqrestore(&ps->lock, flags);
	}
}

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1
100.00%



static void usbdev_vm_open(struct vm_area_struct *vma)
{
	struct usb_memory *usbm = vma->vm_private_data;
	unsigned long flags;

	spin_lock_irqsave(&usbm->ps->lock, flags);
	++usbm->vma_use_count;
	spin_unlock_irqrestore(&usbm->ps->lock, flags);
}

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53
100.00%
1
100.00%



static void usbdev_vm_close(struct vm_area_struct *vma)
{
	struct usb_memory *usbm = vma->vm_private_data;

	dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
}

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30
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1
100.00%


static struct vm_operations_struct usbdev_vm_ops = {
	.open = usbdev_vm_open,
	.close = usbdev_vm_close
};



static int usbdev_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct usb_memory *usbm = NULL;
	struct usb_dev_state *ps = file->private_data;
	size_t size = vma->vm_end - vma->vm_start;
	void *mem;
	unsigned long flags;
	dma_addr_t dma_handle;
	int ret;

	ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory));
	if (ret)
		goto error;

	usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL);
	if (!usbm) {
		ret = -ENOMEM;
		goto error_decrease_mem;
	}

	mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN,
			&dma_handle);
	if (!mem) {
		ret = -ENOMEM;
		goto error_free_usbm;
	}

	memset(mem, 0, size);

	usbm->mem = mem;
	usbm->dma_handle = dma_handle;
	usbm->size = size;
	usbm->ps = ps;
	usbm->vm_start = vma->vm_start;
	usbm->vma_use_count = 1;
	INIT_LIST_HEAD(&usbm->memlist);

	if (remap_pfn_range(vma, vma->vm_start,
			virt_to_phys(usbm->mem) >> PAGE_SHIFT,
			size, vma->vm_page_prot) < 0) {
		dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
		return -EAGAIN;
	}

	vma->vm_flags |= VM_IO;
	vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
	vma->vm_ops = &usbdev_vm_ops;
	vma->vm_private_data = usbm;

	spin_lock_irqsave(&ps->lock, flags);
	list_add_tail(&usbm->memlist, &ps->memory_list);
	spin_unlock_irqrestore(&ps->lock, flags);

	return 0;

error_free_usbm:
	kfree(usbm);
error_decrease_mem:
	usbfs_decrease_memory_usage(size + sizeof(struct usb_memory));
error:
	return ret;
}

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6.42%
2
40.00%
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3
0.92%
1
20.00%
Jiri Slaby
2
0.61%
1
20.00%
Total
327
100.00%
5
100.00%



static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
			   loff_t *ppos)
{
	struct usb_dev_state *ps = file->private_data;
	struct usb_device *dev = ps->dev;
	ssize_t ret = 0;
	unsigned len;
	loff_t pos;
	int i;

	pos = *ppos;
	usb_lock_device(dev);
	if (!connected(ps)) {
		ret = -ENODEV;
		goto err;
	} else if (pos < 0) {
		ret = -EINVAL;
		goto err;
	}

	if (pos < sizeof(struct usb_device_descriptor)) {
		/* 18 bytes - fits on the stack */
		struct usb_device_descriptor temp_desc;

		memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
		le16_to_cpus(&temp_desc.bcdUSB);
		le16_to_cpus(&temp_desc.idVendor);
		le16_to_cpus(&temp_desc.idProduct);
		le16_to_cpus(&temp_desc.bcdDevice);

		len = sizeof(struct usb_device_descriptor) - pos;
		if (len > nbytes)
			len = nbytes;
		if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
			ret = -EFAULT;
			goto err;
		}

		*ppos += len;
		buf += len;
		nbytes -= len;
		ret += len;
	}

	pos = sizeof(struct usb_device_descriptor);
	for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
		struct usb_config_descriptor *config =
			(struct usb_config_descriptor *)dev->rawdescriptors[i];
		unsigned int length = le16_to_cpu(config->wTotalLength);

		if (*ppos < pos + length) {

			/* The descriptor may claim to be longer than it
                         * really is.  Here is the actual allocated length. */
			unsigned alloclen =
				le16_to_cpu(dev->config[i].desc.wTotalLength);

			len = length - (*ppos - pos);
			if (len > nbytes)
				len = nbytes;

			/* Simply don't write (skip over) unallocated parts */
			if (alloclen > (*ppos - pos)) {
				alloclen -= (*ppos - pos);
				if (copy_to_user(buf,
				    dev->rawdescriptors[i] + (*ppos - pos),
				    min(len, alloclen))) {
					ret = -EFAULT;
					goto err;
				}
			}

			*ppos += len;
			buf += len;
			nbytes -= len;
			ret += len;
		}

		pos += length;
	}

err:
	usb_unlock_device(dev);
	return ret;
}

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10.62%
3
21.43%
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43
9.93%
1
7.14%
Duncan Sands
14
3.23%
2
14.29%
Oliver Neukum
9
2.08%
1
7.14%
Greg Kroah-Hartman
5
1.15%
3
21.43%
Andrew Morton
4
0.92%
1
7.14%
Valentina Manea
1
0.23%
1
7.14%
Total
433
100.00%
14
100.00%

/*
 * async list handling
 */



static struct async *alloc_async(unsigned int numisoframes)
{
	struct async *as;

	as = kzalloc(sizeof(struct async), GFP_KERNEL);
	if (!as)
		return NULL;
	as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
	if (!as->urb) {
		kfree(as);
		return NULL;
	}
	return as;
}

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16.67%
Linus Torvalds
20
28.99%
2
33.33%
Pete Zaitcev
9
13.04%
1
16.67%
Greg Kroah-Hartman
2
2.90%
1
16.67%
Alan Stern
1
1.45%
1
16.67%
Total
69
100.00%
6
100.00%



static void free_async(struct async *as)
{
	int i;

	put_pid(as->pid);
	if (as->cred)
		put_cred(as->cred);
	for (i = 0; i < as->urb->num_sgs; i++) {
		if (sg_page(&as->urb->sg[i]))
			kfree(sg_virt(&as->urb->sg[i]));
	}

	kfree(as->urb->sg);
	if (as->usbm == NULL)
		kfree(as->urb->transfer_buffer);
	else
		dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count);

	kfree(as->urb->setup_packet);
	usb_free_urb(as->urb);
	usbfs_decrease_memory_usage(as->mem_usage);
	kfree(as);
}

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11.11%
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20.92%
2
22.22%
Steinar H. Gunderson
23
15.03%
1
11.11%
Linus Torvalds
9
5.88%
1
11.11%
Alan Stern
7
4.58%
1
11.11%
Eric W. Biedermann
7
4.58%
1
11.11%
Serge E. Hallyn
7
4.58%
1
11.11%
Sarah Sharp
6
3.92%
1
11.11%
Total
153
100.00%
9
100.00%



static void async_newpending(struct async *as)
{
	struct usb_dev_state *ps = as->ps;
	unsigned long flags;

	spin_lock_irqsave(&ps->lock, flags);
	list_add_tail(&as->asynclist, &ps->async_pending);
	spin_unlock_irqrestore(&ps->lock, flags);
}

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1
1.75%
1
33.33%
Valentina Manea
1
1.75%
1
33.33%
Total
57
100.00%
3
100.00%



static void async_removepending(struct async *as)
{
	struct usb_dev_state *ps = as->ps;
	unsigned long flags;

	spin_lock_irqsave(&ps->lock, flags);
	list_del_init(&as->asynclist);
	spin_unlock_irqrestore(&ps->lock, flags);
}

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1
1.92%
1
25.00%
Duncan Sands
1
1.92%
1
25.00%
Lightweight Patch Manager
1
1.92%
1
25.00%
Total
52
100.00%
4
100.00%



static struct async *async_getcompleted(struct usb_dev_state *ps)
{
	unsigned long flags;
	struct async *as = NULL;

	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;
}

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10
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1
1.19%
1
25.00%
Valentina Manea
1
1.19%
1
25.00%
Total
84
100.00%
4
100.00%



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;
}

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38.18%
2
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1
1.82%
1
20.00%
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1
1.82%
1
20.00%
Total
55
100.00%
5
100.00%



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 %p, ep%d %s-%s, "
					"length %u\n",
					userurb, ep, t, d, length);
		else
			dev_info(&udev->dev, "userurb %p, 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);
	}
}

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65
24.90%
1
16.67%
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31
11.88%
1
16.67%
Chris Frey
8
3.07%
1
16.67%
Total
261
100.00%
6
100.00%



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;
	}
}

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100.00%
2
100.00%



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;
}

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1
0.70%
1
33.33%
Total
142
100.00%
3
100.00%


#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;
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
139
86.34%
1
33.33%
Huajun Li
21
13.04%
1
33.33%
Valentina Manea
1
0.62%
1
33.33%
Total
161
100.00%
3
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
88
28.48%
1
5.56%
Alan Stern
72
23.30%
4
22.22%
Oliver Neukum
62
20.06%
2
11.11%
Serge E. Hallyn
30
9.71%
2
11.11%
Greg Kroah-Hartman
21
6.80%
1
5.56%
Chris Frey
14
4.53%
1
5.56%
Hans de Goede
10
3.24%
1
5.56%
Linus Torvalds
3
0.97%
1
5.56%
David P. Quigley
3
0.97%
1
5.56%
Harald Welte
3
0.97%
1
5.56%
Lightweight Patch Manager
1
0.32%
1
5.56%
Dan Carpenter
1
0.32%
1
5.56%
Valentina Manea
1
0.32%
1
5.56%
Total
309
100.00%
18
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
91
73.39%
2
28.57%
Huajun Li
21
16.94%
1
14.29%
Duncan Sands
8
6.45%
1
14.29%
Alan Stern
2
1.61%
1
14.29%
Lightweight Patch Manager
1
0.81%
1
14.29%
Valentina Manea
1
0.81%
1
14.29%
Total
124
100.00%
7
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Duncan Sands
94
98.95%
3
75.00%
Valentina Manea
1
1.05%
1
25.00%
Total
95
100.00%
4
100.00%



static void destroy_all_async(struct usb_dev_state *ps)
{
	destroy_async(ps, &ps->async_pending);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Duncan Sands
20
95.24%
2
66.67%
Valentina Manea
1
4.76%
1
33.33%
Total
21
100.00%
3
100.00%

/*
 * 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
17
80.95%
2
66.67%
Greg Kroah-Hartman
4
19.05%
1
33.33%
Total
21
100.00%
3
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Duncan Sands
38
40.43%
3
27.27%
Greg Kroah-Hartman
20
21.28%
3
27.27%
Linus Torvalds (pre-git)
18
19.15%
1
9.09%
David Brownell
13
13.83%
2
18.18%
Linus Torvalds
4
4.26%
1
9.09%
Valentina Manea
1
1.06%
1
9.09%
Total
94
100.00%
11
100.00%

/* 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
17
100.00%
1
100.00%
Total
17
100.00%
1
100.00%



static int driver_resume(struct usb_interface *intf)
{
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
76
55.47%
1
20.00%
Duncan Sands
38
27.74%
1
20.00%
Reilly Grant
21
15.33%
1
20.00%
Greg Kroah-Hartman
1
0.73%
1
20.00%
Valentina Manea
1
0.73%
1
20.00%
Total
137
100.00%
5
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
71
68.27%
1
25.00%
Duncan Sands
31
29.81%
1
25.00%
Valentina Manea
1
0.96%
1
25.00%
Greg Kroah-Hartman
1
0.96%
1
25.00%
Total
104
100.00%
4
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
61
64.89%
1
14.29%
David Brownell
14
14.89%
1
14.29%
Greg Kroah-Hartman
10
10.64%
2
28.57%
Duncan Sands
5
5.32%
1
14.29%
Pavel Emelyanov
3
3.19%
1
14.29%
Valentina Manea
1
1.06%
1
14.29%
Total
94
100.00%
7
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
146
84.39%
1
25.00%
David Brownell
20
11.56%
2
50.00%
Duncan Sands
7
4.05%
1
25.00%
Total
173
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kurt Garloff
57
22.62%
1
8.33%
Linus Torvalds (pre-git)
54
21.43%
1
8.33%
Matthias M. Dellweg
52
20.63%
1
8.33%
Duncan Sands
21
8.33%
1
8.33%
Hans de Goede
18
7.14%
2
16.67%
Linus Torvalds
15
5.95%
1
8.33%
David Brownell
14
5.56%
1
8.33%
Horst Schirmeier
8
3.17%
1
8.33%
David Vrabel
8
3.17%
1
8.33%
Greg Kroah-Hartman
4
1.59%
1
8.33%
Valentina Manea
1
0.40%
1
8.33%
Total
252
100.00%
12
100.00%



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];
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
44
100.00%
1
100.00%
Total
44
100.00%
1
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
351
99.72%
1
50.00%
Linus Torvalds
1
0.28%
1
50.00%
Total
352
100.00%
2
100.00%



static int match_devt(struct device *dev, void *data)
{
	return dev->devt == (dev_t) (unsigned long) data;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kay Sievers
10
34.48%
1
20.00%
Greg Kroah-Hartman
9
31.03%
2
40.00%
Alan Stern
6
20.69%
1
20.00%
David Howells
4
13.79%
1
20.00%
Total
29
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kay Sievers
31
59.62%
1
16.67%
Alan Stern
9
17.31%
1
16.67%
Greg Kroah-Hartman
7
13.46%
2
33.33%
David Howells
4
7.69%
1
16.67%
Geliang Tang
1
1.92%
1
16.67%
Total
52
100.00%
6
100.00%

/*
 * 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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
120
40.13%
1
4.35%
Alan Stern
91
30.43%
7
30.43%
Oliver Neukum
18
6.02%
2
8.70%
Kay Sievers
14
4.68%
2
8.70%
David P. Quigley
10
3.34%
1
4.35%
Reilly Grant
8
2.68%
1
4.35%
Dan Carpenter
8
2.68%
1
4.35%
Steinar H. Gunderson
8
2.68%
1
4.35%
Eric W. Biedermann
6
2.01%
1
4.35%
Linus Torvalds
5
1.67%
1
4.35%
Greg Kroah-Hartman
5
1.67%
1
4.35%
Valentina Manea
2
0.67%
1
4.35%
Serge E. Hallyn
2
0.67%
1
4.35%
Duncan Sands
1
0.33%
1
4.35%
David Howells
1
0.33%
1
4.35%
Total
299
100.00%
23
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
85
48.57%
1
7.69%
Alan Stern
44
25.14%
4
30.77%
Duncan Sands
28
16.00%
3
23.08%
Serge E. Hallyn
7
4.00%
1
7.69%
Eric W. Biedermann
7
4.00%
1
7.69%
Greg Kroah-Hartman
2
1.14%
1
7.69%
Lightweight Patch Manager
1
0.57%
1
7.69%
Valentina Manea
1
0.57%
1
7.69%
Total
175
100.00%
13
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
272
44.66%
5
22.73%
Alan Stern
175
28.74%
5
22.73%
Chris Frey
50
8.21%
1
4.55%
Greg Kroah-Hartman
47
7.72%
3
13.64%
Linus Torvalds
22
3.61%
1
4.55%
Duncan Sands
16
2.63%
1
4.55%
Andrew Morton
10
1.64%
1
4.55%
David Brownell
7
1.15%
2
9.09%
Michal Sojka
5
0.82%
1
4.55%
Matthias M. Dellweg
4
0.66%
1
4.55%
Valentina Manea
1
0.16%
1
4.55%
Total
609
100.00%
22
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
301
59.72%
5
25.00%
Alan Stern
121
24.01%
5
25.00%
Greg Kroah-Hartman
25
4.96%
3
15.00%
Duncan Sands
22
4.37%
2
10.00%
Chris Frey
16
3.17%
1
5.00%
Mateusz Berezecki
9
1.79%
1
5.00%
Kris Borer
5
0.99%
1
5.00%
Chris Hanson
4
0.79%
1
5.00%
Valentina Manea
1
0.20%
1
5.00%
Total
504
100.00%
20
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
91
100.00%
1
100.00%
Total
91
100.00%
1
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
78
77.23%
2
28.57%
Alan Stern
11
10.89%
1
14.29%
Greg Kroah-Hartman
10
9.90%
2
28.57%
David Vrabel
1
0.99%
1
14.29%
Valentina Manea
1
0.99%
1
14.29%
Total
101
100.00%
7
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
113
83.70%
3
42.86%
Alan Stern
11
8.15%
1
14.29%
Greg Kroah-Hartman
10
7.41%
2
28.57%
Valentina Manea
1
0.74%
1
14.29%
Total
135
100.00%
7
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
85
66.93%
3
33.33%
Duncan Sands
28
22.05%
2
22.22%
David Brownell
11
8.66%
1
11.11%
Chen Gang S
1
0.79%
1
11.11%
Greg Kroah-Hartman
1
0.79%
1
11.11%
Valentina Manea
1
0.79%
1
11.11%
Total
127
100.00%
9
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
54
70.13%
3
42.86%
Kangjie Lu
18
23.38%
1
14.29%
Linus Torvalds
3
3.90%
1
14.29%
Greg Kroah-Hartman
1
1.30%
1
14.29%
Valentina Manea
1
1.30%
1
14.29%
Total
77
100.00%
7
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Reilly Grant
120
86.33%
1
20.00%
Linus Torvalds (pre-git)
17
12.23%
2
40.00%
Lei Ming
1
0.72%
1
20.00%
Valentina Manea
1
0.72%
1
20.00%
Total
139
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
69
81.18%
3
37.50%
Hans de Goede
9
10.59%
1
12.50%
Kris Borer
4
4.71%
1
12.50%
Greg Kroah-Hartman
1
1.18%
1
12.50%
Valentina Manea
1
1.18%
1
12.50%
Duncan Sands
1
1.18%
1
12.50%
Total
85
100.00%
8
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steinar H. Gunderson
81
41.75%
1
12.50%
David Brownell
76
39.18%
2
25.00%
Linus Torvalds (pre-git)
33
17.01%
2
25.00%
Greg Kroah-Hartman
3
1.55%
2
25.00%
Valentina Manea
1
0.52%
1
12.50%
Total
194
100.00%
8
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Steinar H. Gunderson
109
79.56%
1
25.00%
David Brownell
21
15.33%
2
50.00%
Linus Torvalds (pre-git)
7
5.11%
1
25.00%
Total
137
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
571
28.82%
4
8.16%
Alan Stern
555
28.02%
11
22.45%
Hans de Goede
368
18.58%
4
8.16%
Steinar H. Gunderson
170
8.58%
1
2.04%
Chris Frey
57
2.88%
1
2.04%
David Brownell
54
2.73%
3
6.12%
Greg Kroah-Hartman
53
2.68%
5
10.20%
Andrew Morton
39
1.97%
1
2.04%
Linus Torvalds
38
1.92%
4
8.16%
Duncan Sands
13
0.66%
2
4.08%
Rahul Pathak
12
0.61%
1
2.04%
David P. Quigley
10
0.50%
1
2.04%
Dan Streetman
9
0.45%
1
2.04%
Henrik Rydberg
6
0.30%
1
2.04%
Eric W. Biedermann
6
0.30%
1
2.04%
Harald Welte
5
0.25%
1
2.04%
Matthias M. Dellweg
4
0.20%
1
2.04%
Kris Borer
3
0.15%
1
2.04%
Serge E. Hallyn
2
0.10%
1
2.04%
Federico Manzan
2
0.10%
1
2.04%
Oliver Neukum
2
0.10%
1
2.04%
David Howells
1
0.05%
1
2.04%
Valentina Manea
1
0.05%
1
2.04%
Total
1981
100.00%
49
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
56
87.50%
1
33.33%
Linus Torvalds
7
10.94%
1
33.33%
Valentina Manea
1
1.56%
1
33.33%
Total
64
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Huajun Li
57
54.81%
1
25.00%
Linus Torvalds (pre-git)
45
43.27%
1
25.00%
Valentina Manea
1
0.96%
1
25.00%
Greg Kroah-Hartman
1
0.96%
1
25.00%
Total
104
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
135
56.02%
3
23.08%
Andrew Morton
39
16.18%
1
7.69%
Oliver Neukum
24
9.96%
1
7.69%
Linus Torvalds
16
6.64%
1
7.69%
Greg Kroah-Hartman
14
5.81%
2
15.38%
Alan Stern
10
4.15%
3
23.08%
Christopher Li
2
0.83%
1
7.69%
Hans de Goede
1
0.41%
1
7.69%
Total
241
100.00%
13
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
61
52.14%
1
12.50%
Andrew Morton
27
23.08%
1
12.50%
Duncan Sands
11
9.40%
1
12.50%
Greg Kroah-Hartman
9
7.69%
2
25.00%
Alan Stern
8
6.84%
2
25.00%
Valentina Manea
1
0.85%
1
12.50%
Total
117
100.00%
8
100.00%



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 %p\n", as->userurb);
		retval = processcompl(as, (void __user * __user *)arg);
		free_async(as);
		return retval;
	}
	if (signal_pending(current))
		return -EINTR;
	return -ENODEV;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
57
63.33%
1
20.00%
Alan Stern
21
23.33%
2
40.00%
Linus Torvalds
11
12.22%
1
20.00%
Valentina Manea
1
1.11%
1
20.00%
Total
90
100.00%
5
100.00%



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 %p\n", as->userurb);
		retval = processcompl(as, (void __user * __user *)arg);
		free_async(as);
	} else {
		retval = (connected(ps) ? -EAGAIN : -ENODEV);
	}
	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
40
42.11%
1
20.00%
Alan Stern
34
35.79%
2
40.00%
Linus Torvalds
20
21.05%
1
20.00%
Valentina Manea
1
1.05%
1
20.00%
Total
95
100.00%
5
100.00%

#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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Arnd Bergmann
93
98.94%
1
50.00%
Valentina Manea
1
1.06%
1
50.00%
Total
94
100.00%
2
100.00%



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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Arnd Bergmann
136
99.27%
1
50.00%
Valentina Manea
1
0.73%
1
50.00%
Total
137
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Arnd Bergmann
60
98.36%
1
50.00%
Valentina Manea
1
1.64%
1
50.00%
Total
61
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
197
92.49%
1
33.33%
Michael Büsch
15
7.04%
1
33.33%
Mark Lord
1
0.47%
1
33.33%
Total
213
100.00%
3
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
56
88.89%
1
25.00%
Linus Torvalds
5
7.94%
1
25.00%
Valentina Manea
1
1.59%
1
25.00%
Al Viro
1
1.59%
1
25.00%
Total
63
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
192
79.34%
1
9.09%
Linus Torvalds (pre-git)
29
11.98%
2
18.18%
Alan Stern
6
2.48%
2
18.18%
Hans de Goede
5
2.07%
2
18.18%
Al Viro
4
1.65%
2
18.18%
Greg Kroah-Hartman
4
1.65%
1
9.09%
Christopher Li
2
0.83%
1
9.09%
Total
242
100.00%
11
100.00%



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 %p\n", as->userurb);
		retval = processcompl_compat(as, (void __user * __user *)arg);
		free_async(as);
		return retval;
	}
	if (signal_pending(current))
		return -EINTR;
	return -ENODEV;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
42
46.67%
1
16.67%
Alan Stern
21
23.33%
2
33.33%
Linus Torvalds (pre-git)
15
16.67%
1
16.67%
Linus Torvalds
11
12.22%
1
16.67%
Valentina Manea
1
1.11%
1
16.67%
Total
90
100.00%
6
100.00%



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 %p\n", as->userurb);
		retval = processcompl_compat(as, (void __user * __user *)arg);
		free_async(as);
	} else {
		retval = (connected(ps) ? -EAGAIN : -ENODEV);
	}
	return retval;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
35
36.84%
2
22.22%
Alan Stern
34
35.79%
2
22.22%
Linus Torvalds
19
20.00%
1
11.11%
Andrew Morton
3
3.16%
1
11.11%
Al Viro
2
2.11%
1
11.11%
Valentina Manea
1
1.05%
1
11.11%
Greg Kroah-Hartman
1
1.05%
1
11.11%
Total
95
100.00%
9
100.00%

#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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
56
96.55%
3
60.00%
Greg Kroah-Hartman
1
1.72%
1
20.00%
Valentina Manea
1
1.72%
1
20.00%
Total
58
100.00%
5
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
41
87.23%
2
40.00%
Duncan Sands
3
6.38%
1
20.00%
Greg Kroah-Hartman
2
4.26%
1
20.00%
Valentina Manea
1
2.13%
1
20.00%
Total
47
100.00%
5
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
45
64.29%
2
28.57%
Duncan Sands
18
25.71%
2
28.57%
Kris Borer
4
5.71%
1
14.29%
Greg Kroah-Hartman
2
2.86%
1
14.29%
Valentina Manea
1
1.43%
1
14.29%
Total
70
100.00%
7
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
199
48.77%
5
19.23%
Dan Streetman
60
14.71%
2
7.69%
David Brownell
53
12.99%
2
7.69%
Pete Zaitcev
20
4.90%
1
3.85%
Alan Stern
17
4.17%
2
7.69%
Oliver Neukum
15
3.68%
2
7.69%
Duncan Sands
13
3.19%
2
7.69%
Reilly Grant
10
2.45%
1
3.85%
Tülin İzer
4
0.98%
1
3.85%
Kris Borer
4
0.98%
1
3.85%
Greg Kroah-Hartman
3
0.74%
2
7.69%
Mika Kukkonen
3
0.74%
1
3.85%
Alexey Dobriyan
3
0.74%
1
3.85%
Andi Kleen
2
0.49%
1
3.85%
Linus Torvalds
1
0.25%
1
3.85%
Valentina Manea
1
0.25%
1
3.85%
Total
408
100.00%
26
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pete Zaitcev
47
97.92%
1
50.00%
Valentina Manea
1
2.08%
1
50.00%
Total
48
100.00%
2
100.00%

#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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Pete Zaitcev
88
80.73%
1
20.00%
Michael Büsch
16
14.68%
1
20.00%
Andrew Morton
4
3.67%
2
40.00%
Valentina Manea
1
0.92%
1
20.00%
Total
109
100.00%
5
100.00%

#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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
84
98.82%
1
50.00%
Valentina Manea
1
1.18%
1
50.00%
Total
85
100.00%
2
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
48
97.96%
1
50.00%
Valentina Manea
1
2.04%
1
50.00%
Total
49
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
74
91.36%
2
33.33%
Steinar H. Gunderson
2
2.47%
1
16.67%
Alan Stern
2
2.47%
1
16.67%
Reilly Grant
2
2.47%
1
16.67%
Valentina Manea
1
1.23%
1
16.67%
Total
81
100.00%
6
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
192
94.58%
1
33.33%
Reilly Grant
10
4.93%
1
33.33%
Valentina Manea
1
0.49%
1
33.33%
Total
203
100.00%
3
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
101
99.02%
1
50.00%
Linus Torvalds
1
0.98%
1
50.00%
Total
102
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hans de Goede
96
98.97%
1
50.00%
Linus Torvalds
1
1.03%
1
50.00%
Total
97
100.00%
2
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Reilly Grant
53
98.15%
1
50.00%
Masahiro Yamada
1
1.85%
1
50.00%
Total
54
100.00%
2
100.00%

/*
 * 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 %p\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;
	}

 done:
	usb_unlock_device(dev);
	if (ret >= 0)
		inode->i_atime = current_time(inode);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
314
31.81%
4
15.38%
Alan Stern
179
18.14%
5
19.23%
Greg Kroah-Hartman
164
16.62%
1
3.85%
Arnd Bergmann
111
11.25%
1
3.85%
Hans de Goede
52
5.27%
3
11.54%
Andrew Morton
41
4.15%
1
3.85%
Deepa Dinamani
36
3.65%
1
3.85%
Pete Zaitcev
23
2.33%
1
3.85%
Al Viro
20
2.03%
3
11.54%
Harvey Harrison
17
1.72%
1
3.85%
Duncan Sands
15
1.52%
2
7.69%
Reilly Grant
13
1.32%
1
3.85%
Valentina Manea
1
0.10%
1
3.85%
Oliver Neukum
1
0.10%
1
3.85%
Total
987
100.00%
26
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Arnd Bergmann
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%

#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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Arnd Bergmann
39
100.00%
1
100.00%
Total
39
100.00%
1
100.00%

#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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
78
81.25%
1
25.00%
Alan Stern
14
14.58%
1
25.00%
Duncan Sands
3
3.12%
1
25.00%
Valentina Manea
1
1.04%
1
25.00%
Total
96
100.00%
4
100.00%


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);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
137
97.16%
3
60.00%
Serge E. Hallyn
2
1.42%
1
20.00%
Valentina Manea
2
1.42%
1
20.00%
Total
141
100.00%
5
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
35
85.37%
1
50.00%
Alan Stern
6
14.63%
1
50.00%
Total
41
100.00%
2
100.00%


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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kay Sievers
73
74.49%
2
40.00%
Greg Kroah-Hartman
22
22.45%
2
40.00%
Alan Stern
3
3.06%
1
20.00%
Total
98
100.00%
5
100.00%



void usb_devio_cleanup(void)
{
	usb_unregister_notify(&usbdev_nb);
	cdev_del(&usb_device_cdev);
	unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Kay Sievers
19
73.08%
2
50.00%
Greg Kroah-Hartman
6
23.08%
1
25.00%
Alan Stern
1
3.85%
1
25.00%
Total
26
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
4158
29.84%
17
8.13%
Alan Stern
2408
17.28%
40
19.14%
Hans de Goede
1675
12.02%
11
5.26%
Steinar H. Gunderson
1048
7.52%
1
0.48%
Andrew Morton
812
5.83%
5
2.39%
Greg Kroah-Hartman
626
4.49%
20
9.57%
Arnd Bergmann
496
3.56%
1
0.48%
Duncan Sands
491
3.52%
13
6.22%
David Brownell
287
2.06%
12
5.74%
Reilly Grant
244
1.75%
1
0.48%
Linus Torvalds
219
1.57%
14
6.70%
Pete Zaitcev
192
1.38%
2
0.96%
Kay Sievers
163
1.17%
2
0.96%
Chris Frey
153
1.10%
1
0.48%
Oliver Neukum
131
0.94%
9
4.31%
Huajun Li
99
0.71%
1
0.48%
Dan Streetman
69
0.50%
3
1.44%
Serge E. Hallyn
63
0.45%
2
0.96%
Matthias M. Dellweg
60
0.43%
1
0.48%
Kurt Garloff
57
0.41%
1
0.48%
Valentina Manea
55
0.39%
1
0.48%
David Woodhouse
43
0.31%
1
0.48%
Deepa Dinamani
36
0.26%
1
0.48%
Michael Büsch
31
0.22%
1
0.48%
David P. Quigley
29
0.21%
1
0.48%
Eric W. Biedermann
29
0.21%
1
0.48%
Mateusz Berezecki
28
0.20%
1
0.48%
Al Viro
28
0.20%
4
1.91%
Kris Borer
21
0.15%
2
0.96%
Rusty Russell
19
0.14%
2
0.96%
Kangjie Lu
18
0.13%
1
0.48%
Harvey Harrison
17
0.12%
1
0.48%
Rahul Pathak
12
0.09%
1
0.48%
Harald Welte
10
0.07%
1
0.48%
David Howells
10
0.07%
2
0.96%
David Vrabel
9
0.06%
2
0.96%
Dan Carpenter
9
0.06%
2
0.96%
Horst Schirmeier
8
0.06%
1
0.48%
Henrik Rydberg
6
0.04%
1
0.48%
Lightweight Patch Manager
6
0.04%
1
0.48%
Sarah Sharp
6
0.04%
1
0.48%
Tülin İzer
6
0.04%
3
1.44%
Michal Sojka
5
0.04%
1
0.48%
Eric Lescouet
4
0.03%
1
0.48%
Chris Hanson
4
0.03%
1
0.48%
Christopher Li
4
0.03%
1
0.48%
Chen Gang S
4
0.03%
1
0.48%
Alexey Dobriyan
3
0.02%
1
0.48%
Pavel Emelyanov
3
0.02%
1
0.48%
Ingo Molnar
3
0.02%
1
0.48%
Mika Kukkonen
3
0.02%
1
0.48%
Dave Jones
3
0.02%
1
0.48%
Andi Kleen
2
0.01%
1
0.48%
Jiri Slaby
2
0.01%
1
0.48%
Federico Manzan
2
0.01%
1
0.48%
Mark Lord
1
0.01%
1
0.48%
Adrian Bunk
1
0.01%
1
0.48%
Lei Ming
1
0.01%
1
0.48%
Geliang Tang
1
0.01%
1
0.48%
Luiz Fernando N. Capitulino
1
0.01%
1
0.48%
Michele Curti
1
0.01%
1
0.48%
Masahiro Yamada
1
0.01%
1
0.48%
Total
13936
100.00%
209
100.00%
Directory: drivers/usb/core

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