Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /*****************************************************************************/ |
| 2 | |
| 3 | /* |
| 4 | * devio.c -- User space communication with USB devices. |
| 5 | * |
| 6 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | * This file implements the usbfs/x/y files, where |
| 23 | * x is the bus number and y the device number. |
| 24 | * |
| 25 | * It allows user space programs/"drivers" to communicate directly |
| 26 | * with USB devices without intervening kernel driver. |
| 27 | * |
| 28 | * Revision history |
| 29 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) |
| 30 | * 04.01.2000 0.2 Turned into its own filesystem |
Harald Welte | 4611383 | 2005-10-10 19:44:29 +0200 | [diff] [blame] | 31 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
| 32 | * (CAN-2005-3055) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
| 34 | |
| 35 | /*****************************************************************************/ |
| 36 | |
| 37 | #include <linux/fs.h> |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/smp_lock.h> |
| 41 | #include <linux/signal.h> |
| 42 | #include <linux/poll.h> |
| 43 | #include <linux/module.h> |
| 44 | #include <linux/usb.h> |
| 45 | #include <linux/usbdevice_fs.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 46 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 47 | #include <linux/cdev.h> |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 48 | #include <linux/notifier.h> |
David Quigley | 7a01955 | 2006-06-30 01:55:48 -0700 | [diff] [blame] | 49 | #include <linux/security.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <asm/uaccess.h> |
| 51 | #include <asm/byteorder.h> |
| 52 | #include <linux/moduleparam.h> |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include "usb.h" |
| 55 | |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 56 | #define USB_MAXBUS 64 |
| 57 | #define USB_DEVICE_MAX USB_MAXBUS * 128 |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 58 | |
Alan Stern | 4a2a8a2 | 2006-07-01 22:05:01 -0400 | [diff] [blame] | 59 | /* Mutual exclusion for removal, open, and release */ |
| 60 | DEFINE_MUTEX(usbfs_mutex); |
| 61 | |
Alan Stern | cd9f037 | 2008-06-24 14:47:04 -0400 | [diff] [blame] | 62 | struct dev_state { |
| 63 | struct list_head list; /* state list */ |
| 64 | struct usb_device *dev; |
| 65 | struct file *file; |
| 66 | spinlock_t lock; /* protects the async urb lists */ |
| 67 | struct list_head async_pending; |
| 68 | struct list_head async_completed; |
| 69 | wait_queue_head_t wait; /* wake up if a request completed */ |
| 70 | unsigned int discsignr; |
| 71 | struct pid *disc_pid; |
| 72 | uid_t disc_uid, disc_euid; |
| 73 | void __user *disccontext; |
| 74 | unsigned long ifclaimed; |
| 75 | u32 secid; |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 76 | u32 disabled_bulk_eps; |
Alan Stern | cd9f037 | 2008-06-24 14:47:04 -0400 | [diff] [blame] | 77 | }; |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | struct async { |
| 80 | struct list_head asynclist; |
| 81 | struct dev_state *ps; |
Eric W. Biederman | 2425c08 | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 82 | struct pid *pid; |
Harald Welte | 4611383 | 2005-10-10 19:44:29 +0200 | [diff] [blame] | 83 | uid_t uid, euid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | unsigned int signr; |
| 85 | unsigned int ifnum; |
| 86 | void __user *userbuffer; |
| 87 | void __user *userurb; |
| 88 | struct urb *urb; |
Alan Stern | e015268 | 2007-08-24 15:42:52 -0400 | [diff] [blame] | 89 | int status; |
David Quigley | 7a01955 | 2006-06-30 01:55:48 -0700 | [diff] [blame] | 90 | u32 secid; |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 91 | u8 bulk_addr; |
| 92 | u8 bulk_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | }; |
| 94 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 95 | static int usbfs_snoop; |
| 96 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
| 97 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | #define snoop(dev, format, arg...) \ |
| 100 | do { \ |
| 101 | if (usbfs_snoop) \ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 102 | dev_info(dev , format , ## arg); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } while (0) |
| 104 | |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 105 | enum snoop_when { |
| 106 | SUBMIT, COMPLETE |
| 107 | }; |
| 108 | |
Alan Stern | fad21bd | 2005-08-10 15:15:57 -0400 | [diff] [blame] | 109 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #define MAX_USBFS_BUFFER_SIZE 16384 |
| 112 | |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 113 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 114 | static int connected(struct dev_state *ps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Alan Stern | 349710c | 2006-07-01 22:05:56 -0400 | [diff] [blame] | 116 | return (!list_empty(&ps->list) && |
| 117 | ps->dev->state != USB_STATE_NOTATTACHED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) |
| 121 | { |
| 122 | loff_t ret; |
| 123 | |
Oliver Neukum | f9de332 | 2010-01-13 15:32:21 +0100 | [diff] [blame] | 124 | mutex_lock(&file->f_dentry->d_inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | switch (orig) { |
| 127 | case 0: |
| 128 | file->f_pos = offset; |
| 129 | ret = file->f_pos; |
| 130 | break; |
| 131 | case 1: |
| 132 | file->f_pos += offset; |
| 133 | ret = file->f_pos; |
| 134 | break; |
| 135 | case 2: |
| 136 | default: |
| 137 | ret = -EINVAL; |
| 138 | } |
| 139 | |
Oliver Neukum | f9de332 | 2010-01-13 15:32:21 +0100 | [diff] [blame] | 140 | mutex_unlock(&file->f_dentry->d_inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | return ret; |
| 142 | } |
| 143 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 144 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
| 145 | loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Tobias Klauser | ec17cf1 | 2006-09-13 21:38:41 +0200 | [diff] [blame] | 147 | struct dev_state *ps = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | struct usb_device *dev = ps->dev; |
| 149 | ssize_t ret = 0; |
| 150 | unsigned len; |
| 151 | loff_t pos; |
| 152 | int i; |
| 153 | |
| 154 | pos = *ppos; |
| 155 | usb_lock_device(dev); |
Alan Stern | 349710c | 2006-07-01 22:05:56 -0400 | [diff] [blame] | 156 | if (!connected(ps)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | ret = -ENODEV; |
| 158 | goto err; |
| 159 | } else if (pos < 0) { |
| 160 | ret = -EINVAL; |
| 161 | goto err; |
| 162 | } |
| 163 | |
| 164 | if (pos < sizeof(struct usb_device_descriptor)) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 165 | /* 18 bytes - fits on the stack */ |
| 166 | struct usb_device_descriptor temp_desc; |
Oliver Neukum | 8781ba0 | 2006-01-06 21:24:25 +0100 | [diff] [blame] | 167 | |
| 168 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); |
Andrew Morton | 9fcd5c3 | 2006-01-18 23:55:07 -0800 | [diff] [blame] | 169 | le16_to_cpus(&temp_desc.bcdUSB); |
| 170 | le16_to_cpus(&temp_desc.idVendor); |
| 171 | le16_to_cpus(&temp_desc.idProduct); |
| 172 | le16_to_cpus(&temp_desc.bcdDevice); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | len = sizeof(struct usb_device_descriptor) - pos; |
| 175 | if (len > nbytes) |
| 176 | len = nbytes; |
Oliver Neukum | 8781ba0 | 2006-01-06 21:24:25 +0100 | [diff] [blame] | 177 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | ret = -EFAULT; |
| 179 | goto err; |
| 180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | *ppos += len; |
| 183 | buf += len; |
| 184 | nbytes -= len; |
| 185 | ret += len; |
| 186 | } |
| 187 | |
| 188 | pos = sizeof(struct usb_device_descriptor); |
| 189 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { |
| 190 | struct usb_config_descriptor *config = |
| 191 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; |
| 192 | unsigned int length = le16_to_cpu(config->wTotalLength); |
| 193 | |
| 194 | if (*ppos < pos + length) { |
| 195 | |
| 196 | /* The descriptor may claim to be longer than it |
| 197 | * really is. Here is the actual allocated length. */ |
| 198 | unsigned alloclen = |
| 199 | le16_to_cpu(dev->config[i].desc.wTotalLength); |
| 200 | |
| 201 | len = length - (*ppos - pos); |
| 202 | if (len > nbytes) |
| 203 | len = nbytes; |
| 204 | |
| 205 | /* Simply don't write (skip over) unallocated parts */ |
| 206 | if (alloclen > (*ppos - pos)) { |
| 207 | alloclen -= (*ppos - pos); |
| 208 | if (copy_to_user(buf, |
| 209 | dev->rawdescriptors[i] + (*ppos - pos), |
| 210 | min(len, alloclen))) { |
| 211 | ret = -EFAULT; |
| 212 | goto err; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | *ppos += len; |
| 217 | buf += len; |
| 218 | nbytes -= len; |
| 219 | ret += len; |
| 220 | } |
| 221 | |
| 222 | pos += length; |
| 223 | } |
| 224 | |
| 225 | err: |
| 226 | usb_unlock_device(dev); |
| 227 | return ret; |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * async list handling |
| 232 | */ |
| 233 | |
| 234 | static struct async *alloc_async(unsigned int numisoframes) |
| 235 | { |
Pete Zaitcev | dd95b81 | 2008-01-05 02:01:07 -0800 | [diff] [blame] | 236 | struct async *as; |
Alan Stern | 0a1ef3b | 2005-10-24 15:38:24 -0400 | [diff] [blame] | 237 | |
Pete Zaitcev | dd95b81 | 2008-01-05 02:01:07 -0800 | [diff] [blame] | 238 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 239 | if (!as) |
| 240 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
| 242 | if (!as->urb) { |
| 243 | kfree(as); |
| 244 | return NULL; |
| 245 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 246 | return as; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | static void free_async(struct async *as) |
| 250 | { |
Eric W. Biederman | 2425c08 | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 251 | put_pid(as->pid); |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 252 | kfree(as->urb->transfer_buffer); |
| 253 | kfree(as->urb->setup_packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | usb_free_urb(as->urb); |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 255 | kfree(as); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 258 | static void async_newpending(struct async *as) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 260 | struct dev_state *ps = as->ps; |
| 261 | unsigned long flags; |
| 262 | |
| 263 | spin_lock_irqsave(&ps->lock, flags); |
| 264 | list_add_tail(&as->asynclist, &ps->async_pending); |
| 265 | spin_unlock_irqrestore(&ps->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 268 | static void async_removepending(struct async *as) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 270 | struct dev_state *ps = as->ps; |
| 271 | unsigned long flags; |
| 272 | |
| 273 | spin_lock_irqsave(&ps->lock, flags); |
| 274 | list_del_init(&as->asynclist); |
| 275 | spin_unlock_irqrestore(&ps->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 278 | static struct async *async_getcompleted(struct dev_state *ps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 280 | unsigned long flags; |
| 281 | struct async *as = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 283 | spin_lock_irqsave(&ps->lock, flags); |
| 284 | if (!list_empty(&ps->async_completed)) { |
| 285 | as = list_entry(ps->async_completed.next, struct async, |
| 286 | asynclist); |
| 287 | list_del_init(&as->asynclist); |
| 288 | } |
| 289 | spin_unlock_irqrestore(&ps->lock, flags); |
| 290 | return as; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
| 292 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 293 | static struct async *async_getpending(struct dev_state *ps, |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 294 | void __user *userurb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 296 | unsigned long flags; |
| 297 | struct async *as; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 299 | spin_lock_irqsave(&ps->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | list_for_each_entry(as, &ps->async_pending, asynclist) |
| 301 | if (as->userurb == userurb) { |
| 302 | list_del_init(&as->asynclist); |
| 303 | spin_unlock_irqrestore(&ps->lock, flags); |
| 304 | return as; |
| 305 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 306 | spin_unlock_irqrestore(&ps->lock, flags); |
| 307 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 310 | static void snoop_urb(struct usb_device *udev, |
| 311 | void __user *userurb, int pipe, unsigned length, |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 312 | int timeout_or_status, enum snoop_when when, |
| 313 | unsigned char *data, unsigned data_len) |
Greg Kroah-Hartman | e639dd3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 314 | { |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 315 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
| 316 | static const char *dirs[] = {"out", "in"}; |
| 317 | int ep; |
| 318 | const char *t, *d; |
Greg Kroah-Hartman | e639dd3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 319 | |
| 320 | if (!usbfs_snoop) |
| 321 | return; |
| 322 | |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 323 | ep = usb_pipeendpoint(pipe); |
| 324 | t = types[usb_pipetype(pipe)]; |
| 325 | d = dirs[!!usb_pipein(pipe)]; |
| 326 | |
| 327 | if (userurb) { /* Async */ |
| 328 | if (when == SUBMIT) |
| 329 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " |
| 330 | "length %u\n", |
| 331 | userurb, ep, t, d, length); |
| 332 | else |
| 333 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " |
| 334 | "actual_length %u status %d\n", |
| 335 | userurb, ep, t, d, length, |
| 336 | timeout_or_status); |
| 337 | } else { |
| 338 | if (when == SUBMIT) |
| 339 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " |
| 340 | "timeout %d\n", |
| 341 | ep, t, d, length, timeout_or_status); |
| 342 | else |
| 343 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " |
| 344 | "status %d\n", |
| 345 | ep, t, d, length, timeout_or_status); |
| 346 | } |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 347 | |
| 348 | if (data && data_len > 0) { |
| 349 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, |
| 350 | data, data_len, 1); |
| 351 | } |
Greg Kroah-Hartman | e639dd3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 352 | } |
| 353 | |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 354 | #define AS_CONTINUATION 1 |
| 355 | #define AS_UNLINK 2 |
| 356 | |
| 357 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) |
| 358 | __releases(ps->lock) |
| 359 | __acquires(ps->lock) |
| 360 | { |
| 361 | struct async *as; |
| 362 | |
| 363 | /* Mark all the pending URBs that match bulk_addr, up to but not |
| 364 | * including the first one without AS_CONTINUATION. If such an |
| 365 | * URB is encountered then a new transfer has already started so |
| 366 | * the endpoint doesn't need to be disabled; otherwise it does. |
| 367 | */ |
| 368 | list_for_each_entry(as, &ps->async_pending, asynclist) { |
| 369 | if (as->bulk_addr == bulk_addr) { |
| 370 | if (as->bulk_status != AS_CONTINUATION) |
| 371 | goto rescan; |
| 372 | as->bulk_status = AS_UNLINK; |
| 373 | as->bulk_addr = 0; |
| 374 | } |
| 375 | } |
| 376 | ps->disabled_bulk_eps |= (1 << bulk_addr); |
| 377 | |
| 378 | /* Now carefully unlink all the marked pending URBs */ |
| 379 | rescan: |
| 380 | list_for_each_entry(as, &ps->async_pending, asynclist) { |
| 381 | if (as->bulk_status == AS_UNLINK) { |
| 382 | as->bulk_status = 0; /* Only once */ |
| 383 | spin_unlock(&ps->lock); /* Allow completions */ |
| 384 | usb_unlink_urb(as->urb); |
| 385 | spin_lock(&ps->lock); |
| 386 | goto rescan; |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 391 | static void async_completed(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 393 | struct async *as = urb->context; |
| 394 | struct dev_state *ps = as->ps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | struct siginfo sinfo; |
Oliver Neukum | 516a1a0 | 2009-07-08 19:09:23 +0200 | [diff] [blame] | 396 | struct pid *pid = NULL; |
| 397 | uid_t uid = 0; |
| 398 | uid_t euid = 0; |
| 399 | u32 secid = 0; |
| 400 | int signr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 402 | spin_lock(&ps->lock); |
| 403 | list_move_tail(&as->asynclist, &ps->async_completed); |
Alan Stern | e015268 | 2007-08-24 15:42:52 -0400 | [diff] [blame] | 404 | as->status = urb->status; |
Oliver Neukum | 516a1a0 | 2009-07-08 19:09:23 +0200 | [diff] [blame] | 405 | signr = as->signr; |
| 406 | if (signr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | sinfo.si_signo = as->signr; |
Alan Stern | e015268 | 2007-08-24 15:42:52 -0400 | [diff] [blame] | 408 | sinfo.si_errno = as->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | sinfo.si_code = SI_ASYNCIO; |
| 410 | sinfo.si_addr = as->userurb; |
Oliver Neukum | 516a1a0 | 2009-07-08 19:09:23 +0200 | [diff] [blame] | 411 | pid = as->pid; |
| 412 | uid = as->uid; |
| 413 | euid = as->euid; |
| 414 | secid = as->secid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
Greg Kroah-Hartman | e639dd3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 416 | snoop(&urb->dev->dev, "urb complete\n"); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 417 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 418 | as->status, COMPLETE, |
| 419 | ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ? |
| 420 | NULL : urb->transfer_buffer, urb->actual_length); |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 421 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
| 422 | as->status != -ENOENT) |
| 423 | cancel_bulk_urbs(ps, as->bulk_addr); |
Oliver Neukum | 516a1a0 | 2009-07-08 19:09:23 +0200 | [diff] [blame] | 424 | spin_unlock(&ps->lock); |
| 425 | |
| 426 | if (signr) |
| 427 | kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid, |
| 428 | euid, secid); |
| 429 | |
Greg Kroah-Hartman | e639dd3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 430 | wake_up(&ps->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 433 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
| 435 | struct async *as; |
| 436 | unsigned long flags; |
| 437 | |
| 438 | spin_lock_irqsave(&ps->lock, flags); |
| 439 | while (!list_empty(list)) { |
| 440 | as = list_entry(list->next, struct async, asynclist); |
| 441 | list_del_init(&as->asynclist); |
| 442 | |
| 443 | /* drop the spinlock so the completion handler can run */ |
| 444 | spin_unlock_irqrestore(&ps->lock, flags); |
| 445 | usb_kill_urb(as->urb); |
| 446 | spin_lock_irqsave(&ps->lock, flags); |
| 447 | } |
| 448 | spin_unlock_irqrestore(&ps->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
| 450 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 451 | static void destroy_async_on_interface(struct dev_state *ps, |
| 452 | unsigned int ifnum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | { |
| 454 | struct list_head *p, *q, hitlist; |
| 455 | unsigned long flags; |
| 456 | |
| 457 | INIT_LIST_HEAD(&hitlist); |
| 458 | spin_lock_irqsave(&ps->lock, flags); |
| 459 | list_for_each_safe(p, q, &ps->async_pending) |
| 460 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) |
| 461 | list_move_tail(p, &hitlist); |
| 462 | spin_unlock_irqrestore(&ps->lock, flags); |
| 463 | destroy_async(ps, &hitlist); |
| 464 | } |
| 465 | |
Alan Stern | d34d972 | 2009-03-09 13:44:48 -0400 | [diff] [blame] | 466 | static void destroy_all_async(struct dev_state *ps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 468 | destroy_async(ps, &ps->async_pending); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | /* |
| 472 | * interface claims are made only at the request of user level code, |
| 473 | * which can also release them (explicitly or by closing files). |
| 474 | * they're also undone when devices disconnect. |
| 475 | */ |
| 476 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 477 | static int driver_probe(struct usb_interface *intf, |
| 478 | const struct usb_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | { |
| 480 | return -ENODEV; |
| 481 | } |
| 482 | |
| 483 | static void driver_disconnect(struct usb_interface *intf) |
| 484 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 485 | struct dev_state *ps = usb_get_intfdata(intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
| 487 | |
| 488 | if (!ps) |
| 489 | return; |
| 490 | |
| 491 | /* NOTE: this relies on usbcore having canceled and completed |
| 492 | * all pending I/O requests; 2.6 does that. |
| 493 | */ |
| 494 | |
| 495 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) |
| 496 | clear_bit(ifnum, &ps->ifclaimed); |
| 497 | else |
Greg Kroah-Hartman | 3b6004f | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 498 | dev_warn(&intf->dev, "interface number %u out of range\n", |
| 499 | ifnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 501 | usb_set_intfdata(intf, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
| 503 | /* force async requests to complete */ |
| 504 | destroy_async_on_interface(ps, ifnum); |
| 505 | } |
| 506 | |
Alan Stern | 2e2eb83 | 2007-12-04 14:35:15 -0500 | [diff] [blame] | 507 | /* The following routines are merely placeholders. There is no way |
| 508 | * to inform a user task about suspend or resumes. |
| 509 | */ |
| 510 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) |
| 511 | { |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | static int driver_resume(struct usb_interface *intf) |
| 516 | { |
| 517 | return 0; |
| 518 | } |
| 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | struct usb_driver usbfs_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | .name = "usbfs", |
| 522 | .probe = driver_probe, |
| 523 | .disconnect = driver_disconnect, |
Alan Stern | 2e2eb83 | 2007-12-04 14:35:15 -0500 | [diff] [blame] | 524 | .suspend = driver_suspend, |
| 525 | .resume = driver_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | }; |
| 527 | |
| 528 | static int claimintf(struct dev_state *ps, unsigned int ifnum) |
| 529 | { |
| 530 | struct usb_device *dev = ps->dev; |
| 531 | struct usb_interface *intf; |
| 532 | int err; |
| 533 | |
| 534 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 535 | return -EINVAL; |
| 536 | /* already claimed */ |
| 537 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 538 | return 0; |
| 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | intf = usb_ifnum_to_if(dev, ifnum); |
| 541 | if (!intf) |
| 542 | err = -ENOENT; |
| 543 | else |
| 544 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | if (err == 0) |
| 546 | set_bit(ifnum, &ps->ifclaimed); |
| 547 | return err; |
| 548 | } |
| 549 | |
| 550 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) |
| 551 | { |
| 552 | struct usb_device *dev; |
| 553 | struct usb_interface *intf; |
| 554 | int err; |
| 555 | |
| 556 | err = -EINVAL; |
| 557 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 558 | return err; |
| 559 | dev = ps->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | intf = usb_ifnum_to_if(dev, ifnum); |
| 561 | if (!intf) |
| 562 | err = -ENOENT; |
| 563 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { |
| 564 | usb_driver_release_interface(&usbfs_driver, intf); |
| 565 | err = 0; |
| 566 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | return err; |
| 568 | } |
| 569 | |
| 570 | static int checkintf(struct dev_state *ps, unsigned int ifnum) |
| 571 | { |
| 572 | if (ps->dev->state != USB_STATE_CONFIGURED) |
| 573 | return -EHOSTUNREACH; |
| 574 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 575 | return -EINVAL; |
| 576 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 577 | return 0; |
| 578 | /* if not yet claimed, claim it for the driver */ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 579 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
| 580 | "interface %u before use\n", task_pid_nr(current), |
| 581 | current->comm, ifnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return claimintf(ps, ifnum); |
| 583 | } |
| 584 | |
| 585 | static int findintfep(struct usb_device *dev, unsigned int ep) |
| 586 | { |
| 587 | unsigned int i, j, e; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 588 | struct usb_interface *intf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | struct usb_host_interface *alts; |
| 590 | struct usb_endpoint_descriptor *endpt; |
| 591 | |
| 592 | if (ep & ~(USB_DIR_IN|0xf)) |
| 593 | return -EINVAL; |
| 594 | if (!dev->actconfig) |
| 595 | return -ESRCH; |
| 596 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
| 597 | intf = dev->actconfig->interface[i]; |
| 598 | for (j = 0; j < intf->num_altsetting; j++) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 599 | alts = &intf->altsetting[j]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
| 601 | endpt = &alts->endpoint[e].desc; |
| 602 | if (endpt->bEndpointAddress == ep) |
| 603 | return alts->desc.bInterfaceNumber; |
| 604 | } |
| 605 | } |
| 606 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 607 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | } |
| 609 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 610 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
| 611 | unsigned int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | { |
| 613 | int ret = 0; |
| 614 | |
David Vrabel | 6da9c99 | 2009-02-18 14:43:47 +0000 | [diff] [blame] | 615 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
| 616 | && ps->dev->state != USB_STATE_ADDRESS |
Horst Schirmeier | 24f8b11 | 2006-03-11 00:16:55 -0800 | [diff] [blame] | 617 | && ps->dev->state != USB_STATE_CONFIGURED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return -EHOSTUNREACH; |
| 619 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) |
| 620 | return 0; |
| 621 | |
| 622 | index &= 0xff; |
| 623 | switch (requesttype & USB_RECIP_MASK) { |
| 624 | case USB_RECIP_ENDPOINT: |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 625 | ret = findintfep(ps->dev, index); |
| 626 | if (ret >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | ret = checkintf(ps, ret); |
| 628 | break; |
| 629 | |
| 630 | case USB_RECIP_INTERFACE: |
| 631 | ret = checkintf(ps, index); |
| 632 | break; |
| 633 | } |
| 634 | return ret; |
| 635 | } |
| 636 | |
Alan Stern | 61ad04a | 2008-06-24 14:47:12 -0400 | [diff] [blame] | 637 | static int match_devt(struct device *dev, void *data) |
Greg Kroah-Hartman | 4592bf5 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 638 | { |
David Howells | a80d5ff | 2008-07-02 12:28:55 +0100 | [diff] [blame] | 639 | return dev->devt == (dev_t) (unsigned long) data; |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 640 | } |
Greg Kroah-Hartman | 4592bf5 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 641 | |
Alan Stern | 61ad04a | 2008-06-24 14:47:12 -0400 | [diff] [blame] | 642 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 643 | { |
| 644 | struct device *dev; |
| 645 | |
David Howells | a80d5ff | 2008-07-02 12:28:55 +0100 | [diff] [blame] | 646 | dev = bus_find_device(&usb_bus_type, NULL, |
| 647 | (void *) (unsigned long) devt, match_devt); |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 648 | if (!dev) |
| 649 | return NULL; |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 650 | return container_of(dev, struct usb_device, dev); |
| 651 | } |
Greg Kroah-Hartman | 4592bf5 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | /* |
| 654 | * file operations |
| 655 | */ |
| 656 | static int usbdev_open(struct inode *inode, struct file *file) |
| 657 | { |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 658 | struct usb_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | struct dev_state *ps; |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 660 | const struct cred *cred = current_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | int ret; |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | ret = -ENOMEM; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 664 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
| 665 | if (!ps) |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 666 | goto out_free_ps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Alan Stern | 01105a2 | 2009-07-30 15:28:14 -0400 | [diff] [blame] | 668 | ret = -ENODEV; |
Alan Stern | 61ad04a | 2008-06-24 14:47:12 -0400 | [diff] [blame] | 669 | |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 670 | /* Protect against simultaneous removal or release */ |
| 671 | mutex_lock(&usbfs_mutex); |
| 672 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 673 | /* usbdev device-node */ |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 674 | if (imajor(inode) == USB_DEVICE_MAJOR) |
Alan Stern | 61ad04a | 2008-06-24 14:47:12 -0400 | [diff] [blame] | 675 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 676 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 677 | #ifdef CONFIG_USB_DEVICEFS |
| 678 | /* procfs file */ |
Alan Stern | d64aac3 | 2008-06-24 14:47:19 -0400 | [diff] [blame] | 679 | if (!dev) { |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 680 | dev = inode->i_private; |
Alan Stern | d64aac3 | 2008-06-24 14:47:19 -0400 | [diff] [blame] | 681 | if (dev && dev->usbfs_dentry && |
| 682 | dev->usbfs_dentry->d_inode == inode) |
| 683 | usb_get_dev(dev); |
| 684 | else |
| 685 | dev = NULL; |
| 686 | } |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 687 | #endif |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 688 | mutex_unlock(&usbfs_mutex); |
| 689 | |
| 690 | if (!dev) |
| 691 | goto out_free_ps; |
| 692 | |
| 693 | usb_lock_device(dev); |
| 694 | if (dev->state == USB_STATE_NOTATTACHED) |
| 695 | goto out_unlock_device; |
| 696 | |
Alan Stern | 94fcda1 | 2006-11-20 11:38:46 -0500 | [diff] [blame] | 697 | ret = usb_autoresume_device(dev); |
Alan Stern | 01d883d | 2006-08-30 15:47:18 -0400 | [diff] [blame] | 698 | if (ret) |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 699 | goto out_unlock_device; |
Alan Stern | 01d883d | 2006-08-30 15:47:18 -0400 | [diff] [blame] | 700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | ps->dev = dev; |
| 702 | ps->file = file; |
| 703 | spin_lock_init(&ps->lock); |
Dan Carpenter | 316547f | 2006-12-13 00:03:38 -0800 | [diff] [blame] | 704 | INIT_LIST_HEAD(&ps->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | INIT_LIST_HEAD(&ps->async_pending); |
| 706 | INIT_LIST_HEAD(&ps->async_completed); |
| 707 | init_waitqueue_head(&ps->wait); |
| 708 | ps->discsignr = 0; |
Eric W. Biederman | 2425c08 | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 709 | ps->disc_pid = get_pid(task_pid(current)); |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 710 | ps->disc_uid = cred->uid; |
| 711 | ps->disc_euid = cred->euid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | ps->disccontext = NULL; |
| 713 | ps->ifclaimed = 0; |
David Quigley | 7a01955 | 2006-06-30 01:55:48 -0700 | [diff] [blame] | 714 | security_task_getsecid(current, &ps->secid); |
Oliver Neukum | 527660a | 2007-04-20 20:50:48 +0200 | [diff] [blame] | 715 | smp_wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | list_add_tail(&ps->list, &dev->filelist); |
| 717 | file->private_data = ps; |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 718 | usb_unlock_device(dev); |
Alan Stern | 2da41d5 | 2008-10-06 11:24:26 -0400 | [diff] [blame] | 719 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
| 720 | current->comm); |
Alan Stern | 62e299e | 2010-01-08 12:56:19 -0500 | [diff] [blame] | 721 | return ret; |
| 722 | |
| 723 | out_unlock_device: |
| 724 | usb_unlock_device(dev); |
| 725 | usb_put_dev(dev); |
| 726 | out_free_ps: |
| 727 | kfree(ps); |
Alan Stern | 4a2a8a2 | 2006-07-01 22:05:01 -0400 | [diff] [blame] | 728 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | static int usbdev_release(struct inode *inode, struct file *file) |
| 732 | { |
Tobias Klauser | ec17cf1 | 2006-09-13 21:38:41 +0200 | [diff] [blame] | 733 | struct dev_state *ps = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | struct usb_device *dev = ps->dev; |
| 735 | unsigned int ifnum; |
Alan Stern | 6ff1046 | 2009-03-09 13:44:02 -0400 | [diff] [blame] | 736 | struct async *as; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
| 738 | usb_lock_device(dev); |
Alan Stern | 7cbe5dc | 2009-06-29 10:56:54 -0400 | [diff] [blame] | 739 | usb_hub_release_all_ports(dev, ps); |
Alan Stern | 4a2a8a2 | 2006-07-01 22:05:01 -0400 | [diff] [blame] | 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | list_del_init(&ps->list); |
Alan Stern | 4a2a8a2 | 2006-07-01 22:05:01 -0400 | [diff] [blame] | 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
| 744 | ifnum++) { |
| 745 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 746 | releaseintf(ps, ifnum); |
| 747 | } |
| 748 | destroy_all_async(ps); |
Alan Stern | 94fcda1 | 2006-11-20 11:38:46 -0500 | [diff] [blame] | 749 | usb_autosuspend_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | usb_unlock_device(dev); |
| 751 | usb_put_dev(dev); |
Eric W. Biederman | 2425c08 | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 752 | put_pid(ps->disc_pid); |
Alan Stern | 6ff1046 | 2009-03-09 13:44:02 -0400 | [diff] [blame] | 753 | |
| 754 | as = async_getcompleted(ps); |
| 755 | while (as) { |
| 756 | free_async(as); |
| 757 | as = async_getcompleted(ps); |
| 758 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | kfree(ps); |
Alan Stern | 4a2a8a2 | 2006-07-01 22:05:01 -0400 | [diff] [blame] | 760 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | static int proc_control(struct dev_state *ps, void __user *arg) |
| 764 | { |
| 765 | struct usb_device *dev = ps->dev; |
| 766 | struct usbdevfs_ctrltransfer ctrl; |
| 767 | unsigned int tmo; |
| 768 | unsigned char *tbuf; |
Andrew Morton | ff66e3c | 2008-03-12 13:32:24 -0700 | [diff] [blame] | 769 | unsigned wLength; |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 770 | int i, pipe, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
| 772 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| 773 | return -EFAULT; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 774 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
| 775 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | return ret; |
Andrew Morton | ff66e3c | 2008-03-12 13:32:24 -0700 | [diff] [blame] | 777 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
| 778 | if (wLength > PAGE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | return -EINVAL; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 780 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
| 781 | if (!tbuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return -ENOMEM; |
| 783 | tmo = ctrl.timeout; |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 784 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
| 785 | "bRequest=%02x wValue=%04x " |
| 786 | "wIndex=%04x wLength=%04x\n", |
| 787 | ctrl.bRequestType, ctrl.bRequest, |
| 788 | __le16_to_cpup(&ctrl.wValue), |
| 789 | __le16_to_cpup(&ctrl.wIndex), |
| 790 | __le16_to_cpup(&ctrl.wLength)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | if (ctrl.bRequestType & 0x80) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 792 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
| 793 | ctrl.wLength)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | free_page((unsigned long)tbuf); |
| 795 | return -EINVAL; |
| 796 | } |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 797 | pipe = usb_rcvctrlpipe(dev, 0); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 798 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
| 800 | usb_unlock_device(dev); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 801 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 802 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
| 803 | tbuf, ctrl.wLength, tmo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | usb_lock_device(dev); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 805 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
| 806 | tbuf, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | if ((i > 0) && ctrl.wLength) { |
Alan Stern | fe0410c | 2005-07-29 12:16:58 -0700 | [diff] [blame] | 808 | if (copy_to_user(ctrl.data, tbuf, i)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | free_page((unsigned long)tbuf); |
| 810 | return -EFAULT; |
| 811 | } |
| 812 | } |
| 813 | } else { |
| 814 | if (ctrl.wLength) { |
| 815 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { |
| 816 | free_page((unsigned long)tbuf); |
| 817 | return -EFAULT; |
| 818 | } |
| 819 | } |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 820 | pipe = usb_sndctrlpipe(dev, 0); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 821 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
| 822 | tbuf, ctrl.wLength); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | usb_unlock_device(dev); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 825 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
| 826 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
| 827 | tbuf, ctrl.wLength, tmo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | usb_lock_device(dev); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 829 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | } |
| 831 | free_page((unsigned long)tbuf); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 832 | if (i < 0 && i != -EPIPE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
| 834 | "failed cmd %s rqt %u rq %u len %u ret %d\n", |
| 835 | current->comm, ctrl.bRequestType, ctrl.bRequest, |
| 836 | ctrl.wLength, i); |
| 837 | } |
| 838 | return i; |
| 839 | } |
| 840 | |
| 841 | static int proc_bulk(struct dev_state *ps, void __user *arg) |
| 842 | { |
| 843 | struct usb_device *dev = ps->dev; |
| 844 | struct usbdevfs_bulktransfer bulk; |
| 845 | unsigned int tmo, len1, pipe; |
| 846 | int len2; |
| 847 | unsigned char *tbuf; |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 848 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | if (copy_from_user(&bulk, arg, sizeof(bulk))) |
| 851 | return -EFAULT; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 852 | ret = findintfep(ps->dev, bulk.ep); |
| 853 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | return ret; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 855 | ret = checkintf(ps, ret); |
| 856 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | return ret; |
| 858 | if (bulk.ep & USB_DIR_IN) |
| 859 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); |
| 860 | else |
| 861 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); |
| 862 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) |
| 863 | return -EINVAL; |
| 864 | len1 = bulk.len; |
| 865 | if (len1 > MAX_USBFS_BUFFER_SIZE) |
| 866 | return -EINVAL; |
| 867 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) |
| 868 | return -ENOMEM; |
| 869 | tmo = bulk.timeout; |
| 870 | if (bulk.ep & 0x80) { |
| 871 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { |
| 872 | kfree(tbuf); |
| 873 | return -EINVAL; |
| 874 | } |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 875 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | usb_unlock_device(dev); |
| 878 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| 879 | usb_lock_device(dev); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 880 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | if (!i && len2) { |
| 883 | if (copy_to_user(bulk.data, tbuf, len2)) { |
| 884 | kfree(tbuf); |
| 885 | return -EFAULT; |
| 886 | } |
| 887 | } |
| 888 | } else { |
| 889 | if (len1) { |
| 890 | if (copy_from_user(tbuf, bulk.data, len1)) { |
| 891 | kfree(tbuf); |
| 892 | return -EFAULT; |
| 893 | } |
| 894 | } |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 895 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | usb_unlock_device(dev); |
| 898 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| 899 | usb_lock_device(dev); |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 900 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | } |
| 902 | kfree(tbuf); |
| 903 | if (i < 0) |
| 904 | return i; |
| 905 | return len2; |
| 906 | } |
| 907 | |
| 908 | static int proc_resetep(struct dev_state *ps, void __user *arg) |
| 909 | { |
| 910 | unsigned int ep; |
| 911 | int ret; |
| 912 | |
| 913 | if (get_user(ep, (unsigned int __user *)arg)) |
| 914 | return -EFAULT; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 915 | ret = findintfep(ps->dev, ep); |
| 916 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | return ret; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 918 | ret = checkintf(ps, ret); |
| 919 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | return ret; |
David Vrabel | 3444b26 | 2009-04-08 17:36:28 +0000 | [diff] [blame] | 921 | usb_reset_endpoint(ps->dev, ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | return 0; |
| 923 | } |
| 924 | |
| 925 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) |
| 926 | { |
| 927 | unsigned int ep; |
| 928 | int pipe; |
| 929 | int ret; |
| 930 | |
| 931 | if (get_user(ep, (unsigned int __user *)arg)) |
| 932 | return -EFAULT; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 933 | ret = findintfep(ps->dev, ep); |
| 934 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | return ret; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 936 | ret = checkintf(ps, ret); |
| 937 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return ret; |
| 939 | if (ep & USB_DIR_IN) |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 940 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
| 941 | else |
| 942 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | return usb_clear_halt(ps->dev, pipe); |
| 945 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
| 947 | static int proc_getdriver(struct dev_state *ps, void __user *arg) |
| 948 | { |
| 949 | struct usbdevfs_getdriver gd; |
| 950 | struct usb_interface *intf; |
| 951 | int ret; |
| 952 | |
| 953 | if (copy_from_user(&gd, arg, sizeof(gd))) |
| 954 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
| 956 | if (!intf || !intf->dev.driver) |
| 957 | ret = -ENODATA; |
| 958 | else { |
| 959 | strncpy(gd.driver, intf->dev.driver->name, |
| 960 | sizeof(gd.driver)); |
| 961 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); |
| 962 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | return ret; |
| 964 | } |
| 965 | |
| 966 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) |
| 967 | { |
| 968 | struct usbdevfs_connectinfo ci; |
| 969 | |
| 970 | ci.devnum = ps->dev->devnum; |
| 971 | ci.slow = ps->dev->speed == USB_SPEED_LOW; |
| 972 | if (copy_to_user(arg, &ci, sizeof(ci))) |
| 973 | return -EFAULT; |
| 974 | return 0; |
| 975 | } |
| 976 | |
| 977 | static int proc_resetdevice(struct dev_state *ps) |
| 978 | { |
Ming Lei | 742120c | 2008-06-18 22:00:29 +0800 | [diff] [blame] | 979 | return usb_reset_device(ps->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | static int proc_setintf(struct dev_state *ps, void __user *arg) |
| 983 | { |
| 984 | struct usbdevfs_setinterface setintf; |
| 985 | int ret; |
| 986 | |
| 987 | if (copy_from_user(&setintf, arg, sizeof(setintf))) |
| 988 | return -EFAULT; |
| 989 | if ((ret = checkintf(ps, setintf.interface))) |
| 990 | return ret; |
| 991 | return usb_set_interface(ps->dev, setintf.interface, |
| 992 | setintf.altsetting); |
| 993 | } |
| 994 | |
| 995 | static int proc_setconfig(struct dev_state *ps, void __user *arg) |
| 996 | { |
Alan Stern | 3f141e2 | 2007-02-08 16:40:43 -0500 | [diff] [blame] | 997 | int u; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | int status = 0; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 999 | struct usb_host_config *actconfig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Alan Stern | 3f141e2 | 2007-02-08 16:40:43 -0500 | [diff] [blame] | 1001 | if (get_user(u, (int __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | return -EFAULT; |
| 1003 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1004 | actconfig = ps->dev->actconfig; |
| 1005 | |
| 1006 | /* Don't touch the device if any interfaces are claimed. |
| 1007 | * It could interfere with other drivers' operations, and if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | * an interface is claimed by usbfs it could easily deadlock. |
| 1009 | */ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1010 | if (actconfig) { |
| 1011 | int i; |
| 1012 | |
| 1013 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { |
| 1014 | if (usb_interface_claimed(actconfig->interface[i])) { |
| 1015 | dev_warn(&ps->dev->dev, |
David Brownell | 72ebddb | 2005-04-11 18:34:17 -0700 | [diff] [blame] | 1016 | "usbfs: interface %d claimed by %s " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | "while '%s' sets config #%d\n", |
| 1018 | actconfig->interface[i] |
| 1019 | ->cur_altsetting |
| 1020 | ->desc.bInterfaceNumber, |
David Brownell | 72ebddb | 2005-04-11 18:34:17 -0700 | [diff] [blame] | 1021 | actconfig->interface[i] |
| 1022 | ->dev.driver->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | current->comm, u); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1024 | status = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1027 | } |
| 1028 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | |
| 1030 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, |
| 1031 | * so avoid usb_set_configuration()'s kick to sysfs |
| 1032 | */ |
| 1033 | if (status == 0) { |
| 1034 | if (actconfig && actconfig->desc.bConfigurationValue == u) |
| 1035 | status = usb_reset_configuration(ps->dev); |
| 1036 | else |
| 1037 | status = usb_set_configuration(ps->dev, u); |
| 1038 | } |
| 1039 | |
| 1040 | return status; |
| 1041 | } |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1044 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
| 1045 | void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | { |
| 1047 | struct usbdevfs_iso_packet_desc *isopkt = NULL; |
| 1048 | struct usb_host_endpoint *ep; |
| 1049 | struct async *as; |
| 1050 | struct usb_ctrlrequest *dr = NULL; |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 1051 | const struct cred *cred = current_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | unsigned int u, totlen, isofrmlen; |
Alan Stern | 97b9eb9 | 2007-02-26 14:56:14 -0500 | [diff] [blame] | 1053 | int ret, ifnum = -1; |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1054 | int is_in; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
Alan Stern | 14722ef | 2008-04-17 10:18:11 -0400 | [diff] [blame] | 1056 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
| 1057 | USBDEVFS_URB_SHORT_NOT_OK | |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 1058 | USBDEVFS_URB_BULK_CONTINUATION | |
Alan Stern | 14722ef | 2008-04-17 10:18:11 -0400 | [diff] [blame] | 1059 | USBDEVFS_URB_NO_FSBR | |
| 1060 | USBDEVFS_URB_ZERO_PACKET | |
| 1061 | USBDEVFS_URB_NO_INTERRUPT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | return -EINVAL; |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1063 | if (uurb->buffer_length > 0 && !uurb->buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | return -EINVAL; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1065 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
| 1066 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { |
| 1067 | ifnum = findintfep(ps->dev, uurb->endpoint); |
| 1068 | if (ifnum < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | return ifnum; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1070 | ret = checkintf(ps, ifnum); |
| 1071 | if (ret) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | return ret; |
| 1073 | } |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1074 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
| 1075 | is_in = 1; |
| 1076 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| 1077 | } else { |
| 1078 | is_in = 0; |
| 1079 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| 1080 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | if (!ep) |
| 1082 | return -ENOENT; |
| 1083 | switch(uurb->type) { |
| 1084 | case USBDEVFS_URB_TYPE_CONTROL: |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1085 | if (!usb_endpoint_xfer_control(&ep->desc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | return -EINVAL; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1087 | /* min 8 byte setup packet, |
| 1088 | * max 8 byte setup plus an arbitrary data stage */ |
| 1089 | if (uurb->buffer_length < 8 || |
| 1090 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | return -EINVAL; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1092 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
| 1093 | if (!dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | return -ENOMEM; |
| 1095 | if (copy_from_user(dr, uurb->buffer, 8)) { |
| 1096 | kfree(dr); |
| 1097 | return -EFAULT; |
| 1098 | } |
| 1099 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { |
| 1100 | kfree(dr); |
| 1101 | return -EINVAL; |
| 1102 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1103 | ret = check_ctrlrecip(ps, dr->bRequestType, |
| 1104 | le16_to_cpup(&dr->wIndex)); |
| 1105 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | kfree(dr); |
| 1107 | return ret; |
| 1108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | uurb->number_of_packets = 0; |
| 1110 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
| 1111 | uurb->buffer += 8; |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1112 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
| 1113 | is_in = 1; |
| 1114 | uurb->endpoint |= USB_DIR_IN; |
| 1115 | } else { |
| 1116 | is_in = 0; |
| 1117 | uurb->endpoint &= ~USB_DIR_IN; |
| 1118 | } |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 1119 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
| 1120 | "bRequest=%02x wValue=%04x " |
| 1121 | "wIndex=%04x wLength=%04x\n", |
| 1122 | dr->bRequestType, dr->bRequest, |
| 1123 | __le16_to_cpup(&dr->wValue), |
| 1124 | __le16_to_cpup(&dr->wIndex), |
| 1125 | __le16_to_cpup(&dr->wLength)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | break; |
| 1127 | |
| 1128 | case USBDEVFS_URB_TYPE_BULK: |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1129 | switch (usb_endpoint_type(&ep->desc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | case USB_ENDPOINT_XFER_CONTROL: |
| 1131 | case USB_ENDPOINT_XFER_ISOC: |
| 1132 | return -EINVAL; |
Alan Stern | f661c6f | 2009-12-11 16:20:20 -0500 | [diff] [blame] | 1133 | case USB_ENDPOINT_XFER_INT: |
| 1134 | /* allow single-shot interrupt transfers */ |
| 1135 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; |
| 1136 | goto interrupt_urb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
| 1138 | uurb->number_of_packets = 0; |
| 1139 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| 1140 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | break; |
| 1142 | |
Alan Stern | f661c6f | 2009-12-11 16:20:20 -0500 | [diff] [blame] | 1143 | case USBDEVFS_URB_TYPE_INTERRUPT: |
| 1144 | if (!usb_endpoint_xfer_int(&ep->desc)) |
| 1145 | return -EINVAL; |
| 1146 | interrupt_urb: |
| 1147 | uurb->number_of_packets = 0; |
| 1148 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| 1149 | return -EINVAL; |
| 1150 | break; |
| 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | case USBDEVFS_URB_TYPE_ISO: |
| 1153 | /* arbitrary limit */ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1154 | if (uurb->number_of_packets < 1 || |
| 1155 | uurb->number_of_packets > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | return -EINVAL; |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1157 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | return -EINVAL; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1159 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
| 1160 | uurb->number_of_packets; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
| 1162 | return -ENOMEM; |
| 1163 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { |
| 1164 | kfree(isopkt); |
| 1165 | return -EFAULT; |
| 1166 | } |
| 1167 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1168 | /* arbitrary limit, |
| 1169 | * sufficient for USB 2.0 high-bandwidth iso */ |
Micah Dowty | 3612242 | 2006-05-19 11:26:24 -0700 | [diff] [blame] | 1170 | if (isopkt[u].length > 8192) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | kfree(isopkt); |
| 1172 | return -EINVAL; |
| 1173 | } |
| 1174 | totlen += isopkt[u].length; |
| 1175 | } |
Markus Rechberger | 5971897 | 2009-08-09 21:23:34 +0200 | [diff] [blame] | 1176 | /* 3072 * 64 microframes */ |
| 1177 | if (totlen > 196608) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | kfree(isopkt); |
| 1179 | return -EINVAL; |
| 1180 | } |
| 1181 | uurb->buffer_length = totlen; |
| 1182 | break; |
| 1183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | default: |
| 1185 | return -EINVAL; |
| 1186 | } |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1187 | if (uurb->buffer_length > 0 && |
| 1188 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, |
| 1189 | uurb->buffer, uurb->buffer_length)) { |
| 1190 | kfree(isopkt); |
| 1191 | kfree(dr); |
| 1192 | return -EFAULT; |
| 1193 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1194 | as = alloc_async(uurb->number_of_packets); |
| 1195 | if (!as) { |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 1196 | kfree(isopkt); |
| 1197 | kfree(dr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | return -ENOMEM; |
| 1199 | } |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1200 | if (uurb->buffer_length > 0) { |
| 1201 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, |
| 1202 | GFP_KERNEL); |
| 1203 | if (!as->urb->transfer_buffer) { |
| 1204 | kfree(isopkt); |
| 1205 | kfree(dr); |
| 1206 | free_async(as); |
| 1207 | return -ENOMEM; |
| 1208 | } |
Alan Stern | 7152b59 | 2010-03-06 15:04:03 -0500 | [diff] [blame] | 1209 | /* Isochronous input data may end up being discontiguous |
| 1210 | * if some of the packets are short. Clear the buffer so |
| 1211 | * that the gaps don't leak kernel data to userspace. |
| 1212 | */ |
| 1213 | if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO) |
| 1214 | memset(as->urb->transfer_buffer, 0, |
| 1215 | uurb->buffer_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | } |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1217 | as->urb->dev = ps->dev; |
| 1218 | as->urb->pipe = (uurb->type << 30) | |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1219 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
| 1220 | (uurb->endpoint & USB_DIR_IN); |
Alan Stern | 14722ef | 2008-04-17 10:18:11 -0400 | [diff] [blame] | 1221 | |
| 1222 | /* This tedious sequence is necessary because the URB_* flags |
| 1223 | * are internal to the kernel and subject to change, whereas |
| 1224 | * the USBDEVFS_URB_* flags are a user API and must not be changed. |
| 1225 | */ |
| 1226 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); |
| 1227 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) |
| 1228 | u |= URB_ISO_ASAP; |
| 1229 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) |
| 1230 | u |= URB_SHORT_NOT_OK; |
| 1231 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) |
| 1232 | u |= URB_NO_FSBR; |
| 1233 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) |
| 1234 | u |= URB_ZERO_PACKET; |
| 1235 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) |
| 1236 | u |= URB_NO_INTERRUPT; |
| 1237 | as->urb->transfer_flags = u; |
| 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | as->urb->transfer_buffer_length = uurb->buffer_length; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1240 | as->urb->setup_packet = (unsigned char *)dr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | as->urb->start_frame = uurb->start_frame; |
| 1242 | as->urb->number_of_packets = uurb->number_of_packets; |
Alan Stern | 97b9eb9 | 2007-02-26 14:56:14 -0500 | [diff] [blame] | 1243 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
| 1244 | ps->dev->speed == USB_SPEED_HIGH) |
| 1245 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); |
| 1246 | else |
| 1247 | as->urb->interval = ep->desc.bInterval; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1248 | as->urb->context = as; |
| 1249 | as->urb->complete = async_completed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
| 1251 | as->urb->iso_frame_desc[u].offset = totlen; |
| 1252 | as->urb->iso_frame_desc[u].length = isopkt[u].length; |
| 1253 | totlen += isopkt[u].length; |
| 1254 | } |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 1255 | kfree(isopkt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | as->ps = ps; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1257 | as->userurb = arg; |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1258 | if (is_in && uurb->buffer_length > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | as->userbuffer = uurb->buffer; |
| 1260 | else |
| 1261 | as->userbuffer = NULL; |
| 1262 | as->signr = uurb->signr; |
| 1263 | as->ifnum = ifnum; |
Eric W. Biederman | 2425c08 | 2006-10-02 02:17:28 -0700 | [diff] [blame] | 1264 | as->pid = get_pid(task_pid(current)); |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 1265 | as->uid = cred->uid; |
| 1266 | as->euid = cred->euid; |
David Quigley | 7a01955 | 2006-06-30 01:55:48 -0700 | [diff] [blame] | 1267 | security_task_getsecid(current, &as->secid); |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1268 | if (!is_in && uurb->buffer_length > 0) { |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1269 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
Alan Stern | 9180135 | 2009-06-29 11:04:54 -0400 | [diff] [blame] | 1270 | uurb->buffer_length)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | free_async(as); |
| 1272 | return -EFAULT; |
| 1273 | } |
| 1274 | } |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 1275 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 1276 | as->urb->transfer_buffer_length, 0, SUBMIT, |
| 1277 | is_in ? NULL : as->urb->transfer_buffer, |
| 1278 | uurb->buffer_length); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1279 | async_newpending(as); |
Alan Stern | 01c6460 | 2009-09-01 11:09:56 -0400 | [diff] [blame] | 1280 | |
| 1281 | if (usb_endpoint_xfer_bulk(&ep->desc)) { |
| 1282 | spin_lock_irq(&ps->lock); |
| 1283 | |
| 1284 | /* Not exactly the endpoint address; the direction bit is |
| 1285 | * shifted to the 0x10 position so that the value will be |
| 1286 | * between 0 and 31. |
| 1287 | */ |
| 1288 | as->bulk_addr = usb_endpoint_num(&ep->desc) | |
| 1289 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) |
| 1290 | >> 3); |
| 1291 | |
| 1292 | /* If this bulk URB is the start of a new transfer, re-enable |
| 1293 | * the endpoint. Otherwise mark it as a continuation URB. |
| 1294 | */ |
| 1295 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) |
| 1296 | as->bulk_status = AS_CONTINUATION; |
| 1297 | else |
| 1298 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); |
| 1299 | |
| 1300 | /* Don't accept continuation URBs if the endpoint is |
| 1301 | * disabled because of an earlier error. |
| 1302 | */ |
| 1303 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) |
| 1304 | ret = -EREMOTEIO; |
| 1305 | else |
| 1306 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); |
| 1307 | spin_unlock_irq(&ps->lock); |
| 1308 | } else { |
| 1309 | ret = usb_submit_urb(as->urb, GFP_KERNEL); |
| 1310 | } |
| 1311 | |
| 1312 | if (ret) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1313 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
| 1314 | "usbfs: usb_submit_urb returned %d\n", ret); |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 1315 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
Chris Frey | 0880aef | 2010-01-26 17:07:29 -0500 | [diff] [blame] | 1316 | 0, ret, COMPLETE, NULL, 0); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1317 | async_removepending(as); |
| 1318 | free_async(as); |
| 1319 | return ret; |
| 1320 | } |
| 1321 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | static int proc_submiturb(struct dev_state *ps, void __user *arg) |
| 1325 | { |
| 1326 | struct usbdevfs_urb uurb; |
| 1327 | |
| 1328 | if (copy_from_user(&uurb, arg, sizeof(uurb))) |
| 1329 | return -EFAULT; |
| 1330 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1331 | return proc_do_submiturb(ps, &uurb, |
| 1332 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), |
| 1333 | arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
| 1336 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) |
| 1337 | { |
| 1338 | struct async *as; |
| 1339 | |
| 1340 | as = async_getpending(ps, arg); |
| 1341 | if (!as) |
| 1342 | return -EINVAL; |
| 1343 | usb_kill_urb(as->urb); |
| 1344 | return 0; |
| 1345 | } |
| 1346 | |
| 1347 | static int processcompl(struct async *as, void __user * __user *arg) |
| 1348 | { |
| 1349 | struct urb *urb = as->urb; |
| 1350 | struct usbdevfs_urb __user *userurb = as->userurb; |
| 1351 | void __user *addr = as->userurb; |
| 1352 | unsigned int i; |
| 1353 | |
Alan Stern | 7152b59 | 2010-03-06 15:04:03 -0500 | [diff] [blame] | 1354 | if (as->userbuffer && urb->actual_length) { |
| 1355 | if (urb->number_of_packets > 0) /* Isochronous */ |
| 1356 | i = urb->transfer_buffer_length; |
| 1357 | else /* Non-Isoc */ |
| 1358 | i = urb->actual_length; |
| 1359 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, i)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1360 | goto err_out; |
Alan Stern | 7152b59 | 2010-03-06 15:04:03 -0500 | [diff] [blame] | 1361 | } |
Alan Stern | e015268 | 2007-08-24 15:42:52 -0400 | [diff] [blame] | 1362 | if (put_user(as->status, &userurb->status)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1363 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | if (put_user(urb->actual_length, &userurb->actual_length)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1365 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | if (put_user(urb->error_count, &userurb->error_count)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1367 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1369 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
Christopher Li | 668a954 | 2005-04-18 17:39:26 -0700 | [diff] [blame] | 1370 | for (i = 0; i < urb->number_of_packets; i++) { |
| 1371 | if (put_user(urb->iso_frame_desc[i].actual_length, |
| 1372 | &userurb->iso_frame_desc[i].actual_length)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1373 | goto err_out; |
Christopher Li | 668a954 | 2005-04-18 17:39:26 -0700 | [diff] [blame] | 1374 | if (put_user(urb->iso_frame_desc[i].status, |
| 1375 | &userurb->iso_frame_desc[i].status)) |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1376 | goto err_out; |
Christopher Li | 668a954 | 2005-04-18 17:39:26 -0700 | [diff] [blame] | 1377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | } |
| 1379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | if (put_user(addr, (void __user * __user *)arg)) |
| 1381 | return -EFAULT; |
| 1382 | return 0; |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1383 | |
| 1384 | err_out: |
Oliver Neukum | d794a02 | 2009-06-28 23:34:14 +0200 | [diff] [blame] | 1385 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
| 1387 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1388 | static struct async *reap_as(struct dev_state *ps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1390 | DECLARE_WAITQUEUE(wait, current); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | struct async *as = NULL; |
| 1392 | struct usb_device *dev = ps->dev; |
| 1393 | |
| 1394 | add_wait_queue(&ps->wait, &wait); |
| 1395 | for (;;) { |
| 1396 | __set_current_state(TASK_INTERRUPTIBLE); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1397 | as = async_getcompleted(ps); |
| 1398 | if (as) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | break; |
| 1400 | if (signal_pending(current)) |
| 1401 | break; |
| 1402 | usb_unlock_device(dev); |
| 1403 | schedule(); |
| 1404 | usb_lock_device(dev); |
| 1405 | } |
| 1406 | remove_wait_queue(&ps->wait, &wait); |
| 1407 | set_current_state(TASK_RUNNING); |
| 1408 | return as; |
| 1409 | } |
| 1410 | |
| 1411 | static int proc_reapurb(struct dev_state *ps, void __user *arg) |
| 1412 | { |
| 1413 | struct async *as = reap_as(ps); |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1414 | if (as) { |
| 1415 | int retval = processcompl(as, (void __user * __user *)arg); |
| 1416 | free_async(as); |
| 1417 | return retval; |
| 1418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | if (signal_pending(current)) |
| 1420 | return -EINTR; |
| 1421 | return -EIO; |
| 1422 | } |
| 1423 | |
| 1424 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) |
| 1425 | { |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1426 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | struct async *as; |
| 1428 | |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1429 | as = async_getcompleted(ps); |
| 1430 | retval = -EAGAIN; |
| 1431 | if (as) { |
| 1432 | retval = processcompl(as, (void __user * __user *)arg); |
| 1433 | free_async(as); |
| 1434 | } |
| 1435 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | } |
| 1437 | |
| 1438 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1439 | static int proc_control_compat(struct dev_state *ps, |
| 1440 | struct usbdevfs_ctrltransfer32 __user *p32) |
| 1441 | { |
| 1442 | struct usbdevfs_ctrltransfer __user *p; |
| 1443 | __u32 udata; |
| 1444 | p = compat_alloc_user_space(sizeof(*p)); |
| 1445 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || |
| 1446 | get_user(udata, &p32->data) || |
| 1447 | put_user(compat_ptr(udata), &p->data)) |
| 1448 | return -EFAULT; |
| 1449 | return proc_control(ps, p); |
| 1450 | } |
| 1451 | |
| 1452 | static int proc_bulk_compat(struct dev_state *ps, |
| 1453 | struct usbdevfs_bulktransfer32 __user *p32) |
| 1454 | { |
| 1455 | struct usbdevfs_bulktransfer __user *p; |
| 1456 | compat_uint_t n; |
| 1457 | compat_caddr_t addr; |
| 1458 | |
| 1459 | p = compat_alloc_user_space(sizeof(*p)); |
| 1460 | |
| 1461 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
| 1462 | get_user(n, &p32->len) || put_user(n, &p->len) || |
| 1463 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || |
| 1464 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) |
| 1465 | return -EFAULT; |
| 1466 | |
| 1467 | return proc_bulk(ps, p); |
| 1468 | } |
| 1469 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) |
| 1470 | { |
| 1471 | struct usbdevfs_disconnectsignal32 ds; |
| 1472 | |
| 1473 | if (copy_from_user(&ds, arg, sizeof(ds))) |
| 1474 | return -EFAULT; |
| 1475 | ps->discsignr = ds.signr; |
| 1476 | ps->disccontext = compat_ptr(ds.context); |
| 1477 | return 0; |
| 1478 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
| 1480 | static int get_urb32(struct usbdevfs_urb *kurb, |
| 1481 | struct usbdevfs_urb32 __user *uurb) |
| 1482 | { |
| 1483 | __u32 uptr; |
Michael Buesch | 18753eb | 2009-07-29 11:39:03 +0200 | [diff] [blame] | 1484 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
| 1485 | __get_user(kurb->type, &uurb->type) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | __get_user(kurb->endpoint, &uurb->endpoint) || |
| 1487 | __get_user(kurb->status, &uurb->status) || |
| 1488 | __get_user(kurb->flags, &uurb->flags) || |
| 1489 | __get_user(kurb->buffer_length, &uurb->buffer_length) || |
| 1490 | __get_user(kurb->actual_length, &uurb->actual_length) || |
| 1491 | __get_user(kurb->start_frame, &uurb->start_frame) || |
| 1492 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || |
| 1493 | __get_user(kurb->error_count, &uurb->error_count) || |
| 1494 | __get_user(kurb->signr, &uurb->signr)) |
| 1495 | return -EFAULT; |
| 1496 | |
| 1497 | if (__get_user(uptr, &uurb->buffer)) |
| 1498 | return -EFAULT; |
| 1499 | kurb->buffer = compat_ptr(uptr); |
Mark Lord | ed0c772 | 2009-01-02 02:48:24 -0500 | [diff] [blame] | 1500 | if (__get_user(uptr, &uurb->usercontext)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | return -EFAULT; |
| 1502 | kurb->usercontext = compat_ptr(uptr); |
| 1503 | |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
| 1507 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) |
| 1508 | { |
| 1509 | struct usbdevfs_urb uurb; |
| 1510 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1511 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | return -EFAULT; |
| 1513 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1514 | return proc_do_submiturb(ps, &uurb, |
| 1515 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, |
| 1516 | arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | static int processcompl_compat(struct async *as, void __user * __user *arg) |
| 1520 | { |
| 1521 | struct urb *urb = as->urb; |
| 1522 | struct usbdevfs_urb32 __user *userurb = as->userurb; |
| 1523 | void __user *addr = as->userurb; |
| 1524 | unsigned int i; |
| 1525 | |
Greg KH | d4a4683 | 2010-02-15 09:37:46 -0800 | [diff] [blame] | 1526 | if (as->userbuffer && urb->actual_length) |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1527 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
Greg KH | d4a4683 | 2010-02-15 09:37:46 -0800 | [diff] [blame] | 1528 | urb->actual_length)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | return -EFAULT; |
Alan Stern | e015268 | 2007-08-24 15:42:52 -0400 | [diff] [blame] | 1530 | if (put_user(as->status, &userurb->status)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | return -EFAULT; |
| 1532 | if (put_user(urb->actual_length, &userurb->actual_length)) |
| 1533 | return -EFAULT; |
| 1534 | if (put_user(urb->error_count, &userurb->error_count)) |
| 1535 | return -EFAULT; |
| 1536 | |
Alan Stern | 93cf9b9 | 2007-07-30 17:09:28 -0400 | [diff] [blame] | 1537 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
Christopher Li | 668a954 | 2005-04-18 17:39:26 -0700 | [diff] [blame] | 1538 | for (i = 0; i < urb->number_of_packets; i++) { |
| 1539 | if (put_user(urb->iso_frame_desc[i].actual_length, |
| 1540 | &userurb->iso_frame_desc[i].actual_length)) |
| 1541 | return -EFAULT; |
| 1542 | if (put_user(urb->iso_frame_desc[i].status, |
| 1543 | &userurb->iso_frame_desc[i].status)) |
| 1544 | return -EFAULT; |
| 1545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | } |
| 1547 | |
Al Viro | c714de5 | 2006-10-10 22:45:37 +0100 | [diff] [blame] | 1548 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | return -EFAULT; |
| 1550 | return 0; |
| 1551 | } |
| 1552 | |
| 1553 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) |
| 1554 | { |
| 1555 | struct async *as = reap_as(ps); |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1556 | if (as) { |
| 1557 | int retval = processcompl_compat(as, (void __user * __user *)arg); |
| 1558 | free_async(as); |
| 1559 | return retval; |
| 1560 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | if (signal_pending(current)) |
| 1562 | return -EINTR; |
| 1563 | return -EIO; |
| 1564 | } |
| 1565 | |
| 1566 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) |
| 1567 | { |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1568 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | struct async *as; |
| 1570 | |
Linus Torvalds | ddeee0b | 2010-02-16 12:35:07 -0800 | [diff] [blame] | 1571 | retval = -EAGAIN; |
| 1572 | as = async_getcompleted(ps); |
| 1573 | if (as) { |
| 1574 | retval = processcompl_compat(as, (void __user * __user *)arg); |
| 1575 | free_async(as); |
| 1576 | } |
| 1577 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | } |
| 1579 | |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | #endif |
| 1582 | |
| 1583 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) |
| 1584 | { |
| 1585 | struct usbdevfs_disconnectsignal ds; |
| 1586 | |
| 1587 | if (copy_from_user(&ds, arg, sizeof(ds))) |
| 1588 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | ps->discsignr = ds.signr; |
| 1590 | ps->disccontext = ds.context; |
| 1591 | return 0; |
| 1592 | } |
| 1593 | |
| 1594 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) |
| 1595 | { |
| 1596 | unsigned int ifnum; |
| 1597 | |
| 1598 | if (get_user(ifnum, (unsigned int __user *)arg)) |
| 1599 | return -EFAULT; |
| 1600 | return claimintf(ps, ifnum); |
| 1601 | } |
| 1602 | |
| 1603 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) |
| 1604 | { |
| 1605 | unsigned int ifnum; |
| 1606 | int ret; |
| 1607 | |
| 1608 | if (get_user(ifnum, (unsigned int __user *)arg)) |
| 1609 | return -EFAULT; |
| 1610 | if ((ret = releaseintf(ps, ifnum)) < 0) |
| 1611 | return ret; |
| 1612 | destroy_async_on_interface (ps, ifnum); |
| 1613 | return 0; |
| 1614 | } |
| 1615 | |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1616 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | int size; |
| 1619 | void *buf = NULL; |
| 1620 | int retval = 0; |
| 1621 | struct usb_interface *intf = NULL; |
| 1622 | struct usb_driver *driver = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1624 | /* alloc buffer */ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1625 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
| 1626 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | return -ENOMEM; |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1628 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1629 | if (copy_from_user(buf, ctl->data, size)) { |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 1630 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | return -EFAULT; |
| 1632 | } |
| 1633 | } else { |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1634 | memset(buf, 0, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | } |
| 1636 | } |
| 1637 | |
Alan Stern | 349710c | 2006-07-01 22:05:56 -0400 | [diff] [blame] | 1638 | if (!connected(ps)) { |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 1639 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | return -ENODEV; |
| 1641 | } |
| 1642 | |
| 1643 | if (ps->dev->state != USB_STATE_CONFIGURED) |
| 1644 | retval = -EHOSTUNREACH; |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1645 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
| 1646 | retval = -EINVAL; |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1647 | else switch (ctl->ioctl_code) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | |
| 1649 | /* disconnect kernel driver from interface */ |
| 1650 | case USBDEVFS_DISCONNECT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | if (intf->dev.driver) { |
| 1652 | driver = to_usb_driver(intf->dev.driver); |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1653 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | usb_driver_release_interface(driver, intf); |
| 1655 | } else |
| 1656 | retval = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | break; |
| 1658 | |
| 1659 | /* let kernel drivers try to (re)bind to the interface */ |
| 1660 | case USBDEVFS_CONNECT: |
Alan Stern | 885e974 | 2007-12-03 15:42:10 -0500 | [diff] [blame] | 1661 | if (!intf->dev.driver) |
| 1662 | retval = device_attach(&intf->dev); |
| 1663 | else |
| 1664 | retval = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | break; |
| 1666 | |
| 1667 | /* talk directly to the interface's driver */ |
| 1668 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | if (intf->dev.driver) |
| 1670 | driver = to_usb_driver(intf->dev.driver); |
Andi Kleen | c532b29 | 2010-06-01 23:04:41 +0200 | [diff] [blame^] | 1671 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | retval = -ENOTTY; |
| 1673 | } else { |
Andi Kleen | c532b29 | 2010-06-01 23:04:41 +0200 | [diff] [blame^] | 1674 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | if (retval == -ENOIOCTLCMD) |
| 1676 | retval = -ENOTTY; |
| 1677 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | } |
| 1679 | |
| 1680 | /* cleanup and return */ |
| 1681 | if (retval >= 0 |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1682 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | && size > 0 |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1684 | && copy_to_user(ctl->data, buf, size) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | retval = -EFAULT; |
Jesper Juhl | 6fd19f4 | 2005-04-18 17:39:33 -0700 | [diff] [blame] | 1686 | |
| 1687 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | return retval; |
| 1689 | } |
| 1690 | |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1691 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
| 1692 | { |
| 1693 | struct usbdevfs_ioctl ctrl; |
| 1694 | |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1695 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1696 | return -EFAULT; |
| 1697 | return proc_ioctl(ps, &ctrl); |
| 1698 | } |
| 1699 | |
| 1700 | #ifdef CONFIG_COMPAT |
Andrew Morton | 777da59 | 2005-11-17 09:47:02 -0800 | [diff] [blame] | 1701 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1702 | { |
| 1703 | struct usbdevfs_ioctl32 __user *uioc; |
| 1704 | struct usbdevfs_ioctl ctrl; |
| 1705 | u32 udata; |
| 1706 | |
Andrew Morton | 058120d | 2005-11-17 09:47:49 -0800 | [diff] [blame] | 1707 | uioc = compat_ptr((long)arg); |
Michael Buesch | 18753eb | 2009-07-29 11:39:03 +0200 | [diff] [blame] | 1708 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
| 1709 | __get_user(ctrl.ifno, &uioc->ifno) || |
| 1710 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1711 | __get_user(udata, &uioc->data)) |
| 1712 | return -EFAULT; |
| 1713 | ctrl.data = compat_ptr(udata); |
| 1714 | |
| 1715 | return proc_ioctl(ps, &ctrl); |
| 1716 | } |
| 1717 | #endif |
| 1718 | |
Alan Stern | 7cbe5dc | 2009-06-29 10:56:54 -0400 | [diff] [blame] | 1719 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
| 1720 | { |
| 1721 | unsigned portnum; |
| 1722 | int rc; |
| 1723 | |
| 1724 | if (get_user(portnum, (unsigned __user *) arg)) |
| 1725 | return -EFAULT; |
| 1726 | rc = usb_hub_claim_port(ps->dev, portnum, ps); |
| 1727 | if (rc == 0) |
| 1728 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", |
| 1729 | portnum, task_pid_nr(current), current->comm); |
| 1730 | return rc; |
| 1731 | } |
| 1732 | |
| 1733 | static int proc_release_port(struct dev_state *ps, void __user *arg) |
| 1734 | { |
| 1735 | unsigned portnum; |
| 1736 | |
| 1737 | if (get_user(portnum, (unsigned __user *) arg)) |
| 1738 | return -EFAULT; |
| 1739 | return usb_hub_release_port(ps->dev, portnum, ps); |
| 1740 | } |
| 1741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | /* |
| 1743 | * NOTE: All requests here that have interface numbers as parameters |
| 1744 | * are assuming that somehow the configuration has been prevented from |
| 1745 | * changing. But there's no mechanism to ensure that... |
| 1746 | */ |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1747 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
| 1748 | void __user *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | { |
Tobias Klauser | ec17cf1 | 2006-09-13 21:38:41 +0200 | [diff] [blame] | 1750 | struct dev_state *ps = file->private_data; |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1751 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | struct usb_device *dev = ps->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | int ret = -ENOTTY; |
| 1754 | |
| 1755 | if (!(file->f_mode & FMODE_WRITE)) |
| 1756 | return -EPERM; |
Oliver Neukum | 01412a2 | 2010-01-13 15:33:43 +0100 | [diff] [blame] | 1757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | usb_lock_device(dev); |
Alan Stern | 349710c | 2006-07-01 22:05:56 -0400 | [diff] [blame] | 1759 | if (!connected(ps)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | usb_unlock_device(dev); |
| 1761 | return -ENODEV; |
| 1762 | } |
| 1763 | |
| 1764 | switch (cmd) { |
| 1765 | case USBDEVFS_CONTROL: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1766 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | ret = proc_control(ps, p); |
| 1768 | if (ret >= 0) |
| 1769 | inode->i_mtime = CURRENT_TIME; |
| 1770 | break; |
| 1771 | |
| 1772 | case USBDEVFS_BULK: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1773 | snoop(&dev->dev, "%s: BULK\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | ret = proc_bulk(ps, p); |
| 1775 | if (ret >= 0) |
| 1776 | inode->i_mtime = CURRENT_TIME; |
| 1777 | break; |
| 1778 | |
| 1779 | case USBDEVFS_RESETEP: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1780 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | ret = proc_resetep(ps, p); |
| 1782 | if (ret >= 0) |
| 1783 | inode->i_mtime = CURRENT_TIME; |
| 1784 | break; |
| 1785 | |
| 1786 | case USBDEVFS_RESET: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1787 | snoop(&dev->dev, "%s: RESET\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | ret = proc_resetdevice(ps); |
| 1789 | break; |
| 1790 | |
| 1791 | case USBDEVFS_CLEAR_HALT: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1792 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | ret = proc_clearhalt(ps, p); |
| 1794 | if (ret >= 0) |
| 1795 | inode->i_mtime = CURRENT_TIME; |
| 1796 | break; |
| 1797 | |
| 1798 | case USBDEVFS_GETDRIVER: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1799 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | ret = proc_getdriver(ps, p); |
| 1801 | break; |
| 1802 | |
| 1803 | case USBDEVFS_CONNECTINFO: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1804 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | ret = proc_connectinfo(ps, p); |
| 1806 | break; |
| 1807 | |
| 1808 | case USBDEVFS_SETINTERFACE: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1809 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | ret = proc_setintf(ps, p); |
| 1811 | break; |
| 1812 | |
| 1813 | case USBDEVFS_SETCONFIGURATION: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1814 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | ret = proc_setconfig(ps, p); |
| 1816 | break; |
| 1817 | |
| 1818 | case USBDEVFS_SUBMITURB: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1819 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | ret = proc_submiturb(ps, p); |
| 1821 | if (ret >= 0) |
| 1822 | inode->i_mtime = CURRENT_TIME; |
| 1823 | break; |
| 1824 | |
| 1825 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1826 | case USBDEVFS_CONTROL32: |
| 1827 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); |
| 1828 | ret = proc_control_compat(ps, p); |
| 1829 | if (ret >= 0) |
| 1830 | inode->i_mtime = CURRENT_TIME; |
| 1831 | break; |
| 1832 | |
| 1833 | case USBDEVFS_BULK32: |
| 1834 | snoop(&dev->dev, "%s: BULK32\n", __func__); |
| 1835 | ret = proc_bulk_compat(ps, p); |
| 1836 | if (ret >= 0) |
| 1837 | inode->i_mtime = CURRENT_TIME; |
| 1838 | break; |
| 1839 | |
| 1840 | case USBDEVFS_DISCSIGNAL32: |
| 1841 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); |
| 1842 | ret = proc_disconnectsignal_compat(ps, p); |
| 1843 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
| 1845 | case USBDEVFS_SUBMITURB32: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1846 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | ret = proc_submiturb_compat(ps, p); |
| 1848 | if (ret >= 0) |
| 1849 | inode->i_mtime = CURRENT_TIME; |
| 1850 | break; |
| 1851 | |
| 1852 | case USBDEVFS_REAPURB32: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1853 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | ret = proc_reapurb_compat(ps, p); |
| 1855 | break; |
| 1856 | |
| 1857 | case USBDEVFS_REAPURBNDELAY32: |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 1858 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | ret = proc_reapurbnonblock_compat(ps, p); |
| 1860 | break; |
| 1861 | |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1862 | case USBDEVFS_IOCTL32: |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1863 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
Al Viro | c714de5 | 2006-10-10 22:45:37 +0100 | [diff] [blame] | 1864 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1865 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | #endif |
| 1867 | |
| 1868 | case USBDEVFS_DISCARDURB: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1869 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | ret = proc_unlinkurb(ps, p); |
| 1871 | break; |
| 1872 | |
| 1873 | case USBDEVFS_REAPURB: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1874 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | ret = proc_reapurb(ps, p); |
| 1876 | break; |
| 1877 | |
| 1878 | case USBDEVFS_REAPURBNDELAY: |
Alan Stern | 4c6e897 | 2009-06-29 11:02:04 -0400 | [diff] [blame] | 1879 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | ret = proc_reapurbnonblock(ps, p); |
| 1881 | break; |
| 1882 | |
| 1883 | case USBDEVFS_DISCSIGNAL: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1884 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | ret = proc_disconnectsignal(ps, p); |
| 1886 | break; |
| 1887 | |
| 1888 | case USBDEVFS_CLAIMINTERFACE: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1889 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | ret = proc_claiminterface(ps, p); |
| 1891 | break; |
| 1892 | |
| 1893 | case USBDEVFS_RELEASEINTERFACE: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1894 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | ret = proc_releaseinterface(ps, p); |
| 1896 | break; |
| 1897 | |
| 1898 | case USBDEVFS_IOCTL: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1899 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
Pete Zaitcev | c36fc88 | 2005-10-17 18:15:54 -0700 | [diff] [blame] | 1900 | ret = proc_ioctl_default(ps, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | break; |
Alan Stern | 7cbe5dc | 2009-06-29 10:56:54 -0400 | [diff] [blame] | 1902 | |
| 1903 | case USBDEVFS_CLAIM_PORT: |
| 1904 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); |
| 1905 | ret = proc_claim_port(ps, p); |
| 1906 | break; |
| 1907 | |
| 1908 | case USBDEVFS_RELEASE_PORT: |
| 1909 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); |
| 1910 | ret = proc_release_port(ps, p); |
| 1911 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | } |
| 1913 | usb_unlock_device(dev); |
| 1914 | if (ret >= 0) |
| 1915 | inode->i_atime = CURRENT_TIME; |
| 1916 | return ret; |
| 1917 | } |
| 1918 | |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1919 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
| 1920 | unsigned long arg) |
| 1921 | { |
| 1922 | int ret; |
| 1923 | |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1924 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1925 | |
| 1926 | return ret; |
| 1927 | } |
| 1928 | |
| 1929 | #ifdef CONFIG_COMPAT |
| 1930 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, |
| 1931 | unsigned long arg) |
| 1932 | { |
| 1933 | int ret; |
| 1934 | |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1935 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1936 | |
| 1937 | return ret; |
| 1938 | } |
| 1939 | #endif |
| 1940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | /* No kernel lock - fine */ |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 1942 | static unsigned int usbdev_poll(struct file *file, |
| 1943 | struct poll_table_struct *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | { |
Tobias Klauser | ec17cf1 | 2006-09-13 21:38:41 +0200 | [diff] [blame] | 1945 | struct dev_state *ps = file->private_data; |
| 1946 | unsigned int mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | |
| 1948 | poll_wait(file, &ps->wait, wait); |
| 1949 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) |
| 1950 | mask |= POLLOUT | POLLWRNORM; |
Alan Stern | 349710c | 2006-07-01 22:05:56 -0400 | [diff] [blame] | 1951 | if (!connected(ps)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | mask |= POLLERR | POLLHUP; |
| 1953 | return mask; |
| 1954 | } |
| 1955 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 1956 | const struct file_operations usbdev_file_operations = { |
Arnd Bergmann | 637e8a6 | 2009-11-14 02:28:05 +0100 | [diff] [blame] | 1957 | .owner = THIS_MODULE, |
| 1958 | .llseek = usbdev_lseek, |
| 1959 | .read = usbdev_read, |
| 1960 | .poll = usbdev_poll, |
| 1961 | .unlocked_ioctl = usbdev_ioctl, |
| 1962 | #ifdef CONFIG_COMPAT |
| 1963 | .compat_ioctl = usbdev_compat_ioctl, |
| 1964 | #endif |
| 1965 | .open = usbdev_open, |
| 1966 | .release = usbdev_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | }; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 1968 | |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 1969 | static void usbdev_remove(struct usb_device *udev) |
Alan Stern | cd9f037 | 2008-06-24 14:47:04 -0400 | [diff] [blame] | 1970 | { |
| 1971 | struct dev_state *ps; |
| 1972 | struct siginfo sinfo; |
| 1973 | |
| 1974 | while (!list_empty(&udev->filelist)) { |
| 1975 | ps = list_entry(udev->filelist.next, struct dev_state, list); |
| 1976 | destroy_all_async(ps); |
| 1977 | wake_up_all(&ps->wait); |
| 1978 | list_del_init(&ps->list); |
| 1979 | if (ps->discsignr) { |
| 1980 | sinfo.si_signo = ps->discsignr; |
| 1981 | sinfo.si_errno = EPIPE; |
| 1982 | sinfo.si_code = SI_ASYNCIO; |
| 1983 | sinfo.si_addr = ps->disccontext; |
| 1984 | kill_pid_info_as_uid(ps->discsignr, &sinfo, |
| 1985 | ps->disc_pid, ps->disc_uid, |
| 1986 | ps->disc_euid, ps->secid); |
| 1987 | } |
| 1988 | } |
| 1989 | } |
| 1990 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 1991 | #ifdef CONFIG_USB_DEVICE_CLASS |
| 1992 | static struct class *usb_classdev_class; |
| 1993 | |
| 1994 | static int usb_classdev_add(struct usb_device *dev) |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 1995 | { |
Alan Stern | e04199b | 2008-06-24 14:47:29 -0400 | [diff] [blame] | 1996 | struct device *cldev; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 1997 | |
Greg Kroah-Hartman | b0b090e | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1998 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
| 1999 | NULL, "usbdev%d.%d", dev->bus->busnum, |
| 2000 | dev->devnum); |
Alan Stern | e04199b | 2008-06-24 14:47:29 -0400 | [diff] [blame] | 2001 | if (IS_ERR(cldev)) |
| 2002 | return PTR_ERR(cldev); |
| 2003 | dev->usb_classdev = cldev; |
Akinobu Mita | 27d39e2 | 2006-10-09 18:09:33 +0900 | [diff] [blame] | 2004 | return 0; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2005 | } |
| 2006 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2007 | static void usb_classdev_remove(struct usb_device *dev) |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2008 | { |
Alan Stern | e04199b | 2008-06-24 14:47:29 -0400 | [diff] [blame] | 2009 | if (dev->usb_classdev) |
| 2010 | device_unregister(dev->usb_classdev); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2011 | } |
| 2012 | |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 2013 | #else |
| 2014 | #define usb_classdev_add(dev) 0 |
| 2015 | #define usb_classdev_remove(dev) do {} while (0) |
| 2016 | |
| 2017 | #endif |
| 2018 | |
| 2019 | static int usbdev_notify(struct notifier_block *self, |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2020 | unsigned long action, void *dev) |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2021 | { |
| 2022 | switch (action) { |
| 2023 | case USB_DEVICE_ADD: |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2024 | if (usb_classdev_add(dev)) |
Akinobu Mita | 27d39e2 | 2006-10-09 18:09:33 +0900 | [diff] [blame] | 2025 | return NOTIFY_BAD; |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2026 | break; |
| 2027 | case USB_DEVICE_REMOVE: |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2028 | usb_classdev_remove(dev); |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 2029 | usbdev_remove(dev); |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2030 | break; |
| 2031 | } |
| 2032 | return NOTIFY_OK; |
| 2033 | } |
| 2034 | |
| 2035 | static struct notifier_block usbdev_nb = { |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 2036 | .notifier_call = usbdev_notify, |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2037 | }; |
| 2038 | |
Greg Kroah-Hartman | 7e7654a | 2007-09-12 15:06:57 -0700 | [diff] [blame] | 2039 | static struct cdev usb_device_cdev; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2040 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2041 | int __init usb_devio_init(void) |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2042 | { |
| 2043 | int retval; |
| 2044 | |
Alan Stern | fad21bd | 2005-08-10 15:15:57 -0400 | [diff] [blame] | 2045 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
Greg Kroah-Hartman | 04e482ff | 2008-01-30 15:21:33 -0800 | [diff] [blame] | 2046 | "usb_device"); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2047 | if (retval) { |
Greg Kroah-Hartman | 69a8594 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 2048 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2049 | goto out; |
| 2050 | } |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2051 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
Alan Stern | fad21bd | 2005-08-10 15:15:57 -0400 | [diff] [blame] | 2052 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2053 | if (retval) { |
Greg Kroah-Hartman | 69a8594 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 2054 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
| 2055 | USB_DEVICE_MAJOR); |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2056 | goto error_cdev; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2057 | } |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2058 | #ifdef CONFIG_USB_DEVICE_CLASS |
| 2059 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); |
| 2060 | if (IS_ERR(usb_classdev_class)) { |
Greg Kroah-Hartman | 69a8594 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 2061 | printk(KERN_ERR "Unable to register usb_device class\n"); |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2062 | retval = PTR_ERR(usb_classdev_class); |
| 2063 | cdev_del(&usb_device_cdev); |
| 2064 | usb_classdev_class = NULL; |
| 2065 | goto out; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2066 | } |
Dan Williams | e105b8b | 2008-04-21 10:51:07 -0700 | [diff] [blame] | 2067 | /* devices of this class shadow the major:minor of their parent |
| 2068 | * device, so clear ->dev_kobj to prevent adding duplicate entries |
| 2069 | * to /sys/dev |
| 2070 | */ |
| 2071 | usb_classdev_class->dev_kobj = NULL; |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2072 | #endif |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 2073 | usb_register_notify(&usbdev_nb); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2074 | out: |
| 2075 | return retval; |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2076 | |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2077 | error_cdev: |
| 2078 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
| 2079 | goto out; |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2080 | } |
| 2081 | |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2082 | void usb_devio_cleanup(void) |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2083 | { |
Greg Kroah-Hartman | a7b986b | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 2084 | usb_unregister_notify(&usbdev_nb); |
Alan Stern | 501950d | 2009-01-13 11:33:42 -0500 | [diff] [blame] | 2085 | #ifdef CONFIG_USB_DEVICE_CLASS |
Kay Sievers | 9f8b17e | 2007-03-13 15:59:31 +0100 | [diff] [blame] | 2086 | class_destroy(usb_classdev_class); |
| 2087 | #endif |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2088 | cdev_del(&usb_device_cdev); |
Alan Stern | fad21bd | 2005-08-10 15:15:57 -0400 | [diff] [blame] | 2089 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
Kay Sievers | fbf82fd | 2005-07-31 01:05:53 +0200 | [diff] [blame] | 2090 | } |