| /*****************************************************************************/ |
| |
| /* |
| * devio.c -- User space communication with USB devices. |
| * |
| * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $ |
| * |
| * This file implements the usbfs/x/y files, where |
| * x is the bus number and y the device number. |
| * |
| * It allows user space programs/"drivers" to communicate directly |
| * with USB devices without intervening kernel driver. |
| * |
| * Revision history |
| * 22.12.1999 0.1 Initial release (split from proc_usb.c) |
| * 04.01.2000 0.2 Turned into its own filesystem |
| * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
| * (CAN-2005-3055) |
| */ |
| |
| /*****************************************************************************/ |
| |
| #include <linux/fs.h> |
| #include <linux/mm.h> |
| #include <linux/slab.h> |
| #include <linux/smp_lock.h> |
| #include <linux/signal.h> |
| #include <linux/poll.h> |
| #include <linux/module.h> |
| #include <linux/usb.h> |
| #include <linux/usbdevice_fs.h> |
| #include <linux/cdev.h> |
| #include <linux/notifier.h> |
| #include <asm/uaccess.h> |
| #include <asm/byteorder.h> |
| #include <linux/moduleparam.h> |
| |
| #include "hcd.h" /* for usbcore internals */ |
| #include "usb.h" |
| |
| #define USB_MAXBUS 64 |
| #define USB_DEVICE_MAX USB_MAXBUS * 128 |
| static struct class *usb_device_class; |
| |
| struct async { |
| struct list_head asynclist; |
| struct dev_state *ps; |
| pid_t pid; |
| uid_t uid, euid; |
| unsigned int signr; |
| unsigned int ifnum; |
| void __user *userbuffer; |
| void __user *userurb; |
| struct urb *urb; |
| }; |
| |
| static int usbfs_snoop = 0; |
| module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); |
| |
| #define snoop(dev, format, arg...) \ |
| do { \ |
| if (usbfs_snoop) \ |
| dev_info( dev , format , ## arg); \ |
| } while (0) |
| |
| #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
| |
| |
| #define MAX_USBFS_BUFFER_SIZE 16384 |
| |
| static inline int connected (struct usb_device *dev) |
| { |
| return dev->state != USB_STATE_NOTATTACHED; |
| } |
| |
| static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) |
| { |
| loff_t ret; |
| |
| lock_kernel(); |
| |
| switch (orig) { |
| case 0: |
| file->f_pos = offset; |
| ret = file->f_pos; |
| break; |
| case 1: |
| file->f_pos += offset; |
| ret = file->f_pos; |
| break; |
| case 2: |
| default: |
| ret = -EINVAL; |
| } |
| |
| unlock_kernel(); |
| return ret; |
| } |
| |
| static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) |
| { |
| struct dev_state *ps = (struct dev_state *)file->private_data; |
| struct usb_device *dev = ps->dev; |
| ssize_t ret = 0; |
| unsigned len; |
| loff_t pos; |
| int i; |
| |
| pos = *ppos; |
| usb_lock_device(dev); |
| if (!connected(dev)) { |
| ret = -ENODEV; |
| goto err; |
| } else if (pos < 0) { |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| if (pos < sizeof(struct usb_device_descriptor)) { |
| struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL); |
| if (!desc) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| memcpy(desc, &dev->descriptor, sizeof(dev->descriptor)); |
| le16_to_cpus(&desc->bcdUSB); |
| le16_to_cpus(&desc->idVendor); |
| le16_to_cpus(&desc->idProduct); |
| le16_to_cpus(&desc->bcdDevice); |
| |
| len = sizeof(struct usb_device_descriptor) - pos; |
| if (len > nbytes) |
| len = nbytes; |
| if (copy_to_user(buf, ((char *)desc) + pos, len)) { |
| kfree(desc); |
| ret = -EFAULT; |
| goto err; |
| } |
| kfree(desc); |
| |
| *ppos += len; |
| buf += len; |
| nbytes -= len; |
| ret += len; |
| } |
| |
| pos = sizeof(struct usb_device_descriptor); |
| for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { |
| struct usb_config_descriptor *config = |
| (struct usb_config_descriptor *)dev->rawdescriptors[i]; |
| unsigned int length = le16_to_cpu(config->wTotalLength); |
| |
| if (*ppos < pos + length) { |
| |
| /* The descriptor may claim to be longer than it |
| * really is. Here is the actual allocated length. */ |
| unsigned alloclen = |
| le16_to_cpu(dev->config[i].desc.wTotalLength); |
| |
| len = length - (*ppos - pos); |
| if (len > nbytes) |
| len = nbytes; |
| |
| /* Simply don't write (skip over) unallocated parts */ |
| if (alloclen > (*ppos - pos)) { |
| alloclen -= (*ppos - pos); |
| if (copy_to_user(buf, |
| dev->rawdescriptors[i] + (*ppos - pos), |
| min(len, alloclen))) { |
| ret = -EFAULT; |
| goto err; |
| } |
| } |
| |
| *ppos += len; |
| buf += len; |
| nbytes -= len; |
| ret += len; |
| } |
| |
| pos += length; |
| } |
| |
| err: |
| usb_unlock_device(dev); |
| return ret; |
| } |
| |
| /* |
| * async list handling |
| */ |
| |
| static struct async *alloc_async(unsigned int numisoframes) |
| { |
| unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); |
| struct async *as = kzalloc(assize, GFP_KERNEL); |
| |
| if (!as) |
| return NULL; |
| as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
| if (!as->urb) { |
| kfree(as); |
| return NULL; |
| } |
| return as; |
| } |
| |
| static void free_async(struct async *as) |
| { |
| kfree(as->urb->transfer_buffer); |
| kfree(as->urb->setup_packet); |
| usb_free_urb(as->urb); |
| kfree(as); |
| } |
| |
| static inline void async_newpending(struct async *as) |
| { |
| struct dev_state *ps = as->ps; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ps->lock, flags); |
| list_add_tail(&as->asynclist, &ps->async_pending); |
| spin_unlock_irqrestore(&ps->lock, flags); |
| } |
| |
| static inline void async_removepending(struct async *as) |
| { |
| struct dev_state *ps = as->ps; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ps->lock, flags); |
| list_del_init(&as->asynclist); |
| spin_unlock_irqrestore(&ps->lock, flags); |
| } |
| |
| static inline struct async *async_getcompleted(struct dev_state *ps) |
| { |
| unsigned long flags; |
| struct async *as = NULL; |
| |
| spin_lock_irqsave(&ps->lock, flags); |
| if (!list_empty(&ps->async_completed)) { |
| as = list_entry(ps->async_completed.next, struct async, asynclist); |
| list_del_init(&as->asynclist); |
| } |
| spin_unlock_irqrestore(&ps->lock, flags); |
| return as; |
| } |
| |
| static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) |
| { |
| unsigned long flags; |
| struct async *as; |
| |
| spin_lock_irqsave(&ps->lock, flags); |
| list_for_each_entry(as, &ps->async_pending, asynclist) |
| if (as->userurb == userurb) { |
| list_del_init(&as->asynclist); |
| spin_unlock_irqrestore(&ps->lock, flags); |
| return as; |
| } |
| spin_unlock_irqrestore(&ps->lock, flags); |
| return NULL; |
| } |
| |
| static void snoop_urb(struct urb *urb, void __user *userurb) |
| { |
| int j; |
| unsigned char *data = urb->transfer_buffer; |
| |
| if (!usbfs_snoop) |
| return; |
| |
| if (urb->pipe & USB_DIR_IN) |
| dev_info(&urb->dev->dev, "direction=IN\n"); |
| else |
| dev_info(&urb->dev->dev, "direction=OUT\n"); |
| dev_info(&urb->dev->dev, "userurb=%p\n", userurb); |
| dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", |
| urb->transfer_buffer_length); |
| dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); |
| dev_info(&urb->dev->dev, "data: "); |
| for (j = 0; j < urb->transfer_buffer_length; ++j) |
| printk ("%02x ", data[j]); |
| printk("\n"); |
| } |
| |
| static void async_completed(struct urb *urb, struct pt_regs *regs) |
| { |
| struct async *as = (struct async *)urb->context; |
| struct dev_state *ps = as->ps; |
| struct siginfo sinfo; |
| |
| spin_lock(&ps->lock); |
| list_move_tail(&as->asynclist, &ps->async_completed); |
| spin_unlock(&ps->lock); |
| if (as->signr) { |
| sinfo.si_signo = as->signr; |
| sinfo.si_errno = as->urb->status; |
| sinfo.si_code = SI_ASYNCIO; |
| sinfo.si_addr = as->userurb; |
| kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
| as->euid); |
| } |
| snoop(&urb->dev->dev, "urb complete\n"); |
| snoop_urb(urb, as->userurb); |
| wake_up(&ps->wait); |
| } |
| |
| static void destroy_async (struct dev_state *ps, struct list_head *list) |
| { |
| struct async *as; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ps->lock, flags); |
| while (!list_empty(list)) { |
| as = list_entry(list->next, struct async, asynclist); |
| list_del_init(&as->asynclist); |
| |
| /* drop the spinlock so the completion handler can run */ |
| spin_unlock_irqrestore(&ps->lock, flags); |
| usb_kill_urb(as->urb); |
| spin_lock_irqsave(&ps->lock, flags); |
| } |
| spin_unlock_irqrestore(&ps->lock, flags); |
| as = async_getcompleted(ps); |
| while (as) { |
| free_async(as); |
| as = async_getcompleted(ps); |
| } |
| } |
| |
| static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) |
| { |
| struct list_head *p, *q, hitlist; |
| unsigned long flags; |
| |
| INIT_LIST_HEAD(&hitlist); |
| spin_lock_irqsave(&ps->lock, flags); |
| list_for_each_safe(p, q, &ps->async_pending) |
| if (ifnum == list_entry(p, struct async, asynclist)->ifnum) |
| list_move_tail(p, &hitlist); |
| spin_unlock_irqrestore(&ps->lock, flags); |
| destroy_async(ps, &hitlist); |
| } |
| |
| static inline void destroy_all_async(struct dev_state *ps) |
| { |
| destroy_async(ps, &ps->async_pending); |
| } |
| |
| /* |
| * interface claims are made only at the request of user level code, |
| * which can also release them (explicitly or by closing files). |
| * they're also undone when devices disconnect. |
| */ |
| |
| static int driver_probe (struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| return -ENODEV; |
| } |
| |
| static void driver_disconnect(struct usb_interface *intf) |
| { |
| struct dev_state *ps = usb_get_intfdata (intf); |
| unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
| |
| if (!ps) |
| return; |
| |
| /* NOTE: this relies on usbcore having canceled and completed |
| * all pending I/O requests; 2.6 does that. |
| */ |
| |
| if (likely(ifnum < 8*sizeof(ps->ifclaimed))) |
| clear_bit(ifnum, &ps->ifclaimed); |
| else |
| warn("interface number %u out of range", ifnum); |
| |
| usb_set_intfdata (intf, NULL); |
| |
| /* force async requests to complete */ |
| destroy_async_on_interface(ps, ifnum); |
| } |
| |
| struct usb_driver usbfs_driver = { |
| .owner = THIS_MODULE, |
| .name = "usbfs", |
| .probe = driver_probe, |
| .disconnect = driver_disconnect, |
| }; |
| |
| static int claimintf(struct dev_state *ps, unsigned int ifnum) |
| { |
| struct usb_device *dev = ps->dev; |
| struct usb_interface *intf; |
| int err; |
| |
| if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| return -EINVAL; |
| /* already claimed */ |
| if (test_bit(ifnum, &ps->ifclaimed)) |
| return 0; |
| |
| /* lock against other changes to driver bindings */ |
| down_write(&usb_bus_type.subsys.rwsem); |
| intf = usb_ifnum_to_if(dev, ifnum); |
| if (!intf) |
| err = -ENOENT; |
| else |
| err = usb_driver_claim_interface(&usbfs_driver, intf, ps); |
| up_write(&usb_bus_type.subsys.rwsem); |
| if (err == 0) |
| set_bit(ifnum, &ps->ifclaimed); |
| return err; |
| } |
| |
| static int releaseintf(struct dev_state *ps, unsigned int ifnum) |
| { |
| struct usb_device *dev; |
| struct usb_interface *intf; |
| int err; |
| |
| err = -EINVAL; |
| if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| return err; |
| dev = ps->dev; |
| /* lock against other changes to driver bindings */ |
| down_write(&usb_bus_type.subsys.rwsem); |
| intf = usb_ifnum_to_if(dev, ifnum); |
| if (!intf) |
| err = -ENOENT; |
| else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { |
| usb_driver_release_interface(&usbfs_driver, intf); |
| err = 0; |
| } |
| up_write(&usb_bus_type.subsys.rwsem); |
| return err; |
| } |
| |
| static int checkintf(struct dev_state *ps, unsigned int ifnum) |
| { |
| if (ps->dev->state != USB_STATE_CONFIGURED) |
| return -EHOSTUNREACH; |
| if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| return -EINVAL; |
| if (test_bit(ifnum, &ps->ifclaimed)) |
| return 0; |
| /* if not yet claimed, claim it for the driver */ |
| dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", |
| current->pid, current->comm, ifnum); |
| return claimintf(ps, ifnum); |
| } |
| |
| static int findintfep(struct usb_device *dev, unsigned int ep) |
| { |
| unsigned int i, j, e; |
| struct usb_interface *intf; |
| struct usb_host_interface *alts; |
| struct usb_endpoint_descriptor *endpt; |
| |
| if (ep & ~(USB_DIR_IN|0xf)) |
| return -EINVAL; |
| if (!dev->actconfig) |
| return -ESRCH; |
| for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
| intf = dev->actconfig->interface[i]; |
| for (j = 0; j < intf->num_altsetting; j++) { |
| alts = &intf->altsetting[j]; |
| for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
| endpt = &alts->endpoint[e].desc; |
| if (endpt->bEndpointAddress == ep) |
| return alts->desc.bInterfaceNumber; |
| } |
| } |
| } |
| return -ENOENT; |
| } |
| |
| static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) |
| { |
| int ret = 0; |
| |
| if (ps->dev->state != USB_STATE_CONFIGURED) |
| return -EHOSTUNREACH; |
| if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) |
| return 0; |
| |
| index &= 0xff; |
| switch (requesttype & USB_RECIP_MASK) { |
| case USB_RECIP_ENDPOINT: |
| if ((ret = findintfep(ps->dev, index)) >= 0) |
| ret = checkintf(ps, ret); |
| break; |
| |
| case USB_RECIP_INTERFACE: |
| ret = checkintf(ps, index); |
| break; |
| } |
| return ret; |
| } |
| |
| static struct usb_device *usbdev_lookup_minor(int minor) |
| { |
| struct class_device *class_dev; |
| struct usb_device *dev = NULL; |
| |
| down(&usb_device_class->sem); |
| list_for_each_entry(class_dev, &usb_device_class->children, node) { |
| if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { |
| dev = class_dev->class_data; |
| break; |
| } |
| } |
| up(&usb_device_class->sem); |
| |
| return dev; |
| }; |
| |
| /* |
| * file operations |
| */ |
| static int usbdev_open(struct inode *inode, struct file *file) |
| { |
| struct usb_device *dev = NULL; |
| struct dev_state *ps; |
| int ret; |
| |
| /* |
| * no locking necessary here, as chrdev_open has the kernel lock |
| * (still acquire the kernel lock for safety) |
| */ |
| ret = -ENOMEM; |
| if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) |
| goto out_nolock; |
| |
| lock_kernel(); |
| ret = -ENOENT; |
| /* check if we are called from a real node or usbfs */ |
| if (imajor(inode) == USB_DEVICE_MAJOR) |
| dev = usbdev_lookup_minor(iminor(inode)); |
| if (!dev) |
| dev = inode->u.generic_ip; |
| if (!dev) { |
| kfree(ps); |
| goto out; |
| } |
| usb_get_dev(dev); |
| ret = 0; |
| ps->dev = dev; |
| ps->file = file; |
| spin_lock_init(&ps->lock); |
| INIT_LIST_HEAD(&ps->async_pending); |
| INIT_LIST_HEAD(&ps->async_completed); |
| init_waitqueue_head(&ps->wait); |
| ps->discsignr = 0; |
| ps->disc_pid = current->pid; |
| ps->disc_uid = current->uid; |
| ps->disc_euid = current->euid; |
| ps->disccontext = NULL; |
| ps->ifclaimed = 0; |
| wmb(); |
| list_add_tail(&ps->list, &dev->filelist); |
| file->private_data = ps; |
| out: |
| unlock_kernel(); |
| out_nolock: |
| return ret; |
| } |
| |
| static int usbdev_release(struct inode *inode, struct file *file) |
| { |
| struct dev_state *ps = (struct dev_state *)file->private_data; |
| struct usb_device *dev = ps->dev; |
| unsigned int ifnum; |
| |
| usb_lock_device(dev); |
| list_del_init(&ps->list); |
| for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
| ifnum++) { |
| if (test_bit(ifnum, &ps->ifclaimed)) |
| releaseintf(ps, ifnum); |
| } |
| destroy_all_async(ps); |
| usb_unlock_device(dev); |
| usb_put_dev(dev); |
| ps->dev = NULL; |
| kfree(ps); |
| return 0; |
| } |
| |
| static int proc_control(struct dev_state *ps, void __user *arg) |
| { |
| struct usb_device *dev = ps->dev; |
| struct usbdevfs_ctrltransfer ctrl; |
| unsigned int tmo; |
| unsigned char *tbuf; |
| int i, j, ret; |
| |
| if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| return -EFAULT; |
| if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) |
| return ret; |
| if (ctrl.wLength > PAGE_SIZE) |
| return -EINVAL; |
| if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) |
| return -ENOMEM; |
| tmo = ctrl.timeout; |
| if (ctrl.bRequestType & 0x80) { |
| if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { |
| free_page((unsigned long)tbuf); |
| return -EINVAL; |
| } |
| snoop(&dev->dev, "control read: bRequest=%02x " |
| "bRrequestType=%02x wValue=%04x " |
| "wIndex=%04x wLength=%04x\n", |
| ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, |
| ctrl.wIndex, ctrl.wLength); |
| |
| usb_unlock_device(dev); |
| i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, |
| ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); |
| usb_lock_device(dev); |
| if ((i > 0) && ctrl.wLength) { |
| if (usbfs_snoop) { |
| dev_info(&dev->dev, "control read: data "); |
| for (j = 0; j < i; ++j) |
| printk("%02x ", (unsigned char)(tbuf)[j]); |
| printk("\n"); |
| } |
| if (copy_to_user(ctrl.data, tbuf, i)) { |
| free_page((unsigned long)tbuf); |
| return -EFAULT; |
| } |
| } |
| } else { |
| if (ctrl.wLength) { |
| if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { |
| free_page((unsigned long)tbuf); |
| return -EFAULT; |
| } |
| } |
| snoop(&dev->dev, "control write: bRequest=%02x " |
| "bRrequestType=%02x wValue=%04x " |
| "wIndex=%04x wLength=%04x\n", |
| ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, |
| ctrl.wIndex, ctrl.wLength); |
| if (usbfs_snoop) { |
| dev_info(&dev->dev, "control write: data: "); |
| for (j = 0; j < ctrl.wLength; ++j) |
| printk("%02x ", (unsigned char)(tbuf)[j]); |
| printk("\n"); |
| } |
| usb_unlock_device(dev); |
| i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, |
| ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); |
| usb_lock_device(dev); |
| } |
| free_page((unsigned long)tbuf); |
| if (i<0 && i != -EPIPE) { |
| dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
| "failed cmd %s rqt %u rq %u len %u ret %d\n", |
| current->comm, ctrl.bRequestType, ctrl.bRequest, |
| ctrl.wLength, i); |
| } |
| return i; |
| } |
| |
| static int proc_bulk(struct dev_state *ps, void __user *arg) |
| { |
| struct usb_device *dev = ps->dev; |
| struct usbdevfs_bulktransfer bulk; |
| unsigned int tmo, len1, pipe; |
| int len2; |
| unsigned char *tbuf; |
| int i, j, ret; |
| |
| if (copy_from_user(&bulk, arg, sizeof(bulk))) |
| return -EFAULT; |
| if ((ret = findintfep(ps->dev, bulk.ep)) < 0) |
| return ret; |
| if ((ret = checkintf(ps, ret))) |
| return ret; |
| if (bulk.ep & USB_DIR_IN) |
| pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); |
| else |
| pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); |
| if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) |
| return -EINVAL; |
| len1 = bulk.len; |
| if (len1 > MAX_USBFS_BUFFER_SIZE) |
| return -EINVAL; |
| if (!(tbuf = kmalloc(len1, GFP_KERNEL))) |
| return -ENOMEM; |
| tmo = bulk.timeout; |
| if (bulk.ep & 0x80) { |
| if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { |
| kfree(tbuf); |
| return -EINVAL; |
| } |
| snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
| bulk.len, bulk.timeout); |
| usb_unlock_device(dev); |
| i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| usb_lock_device(dev); |
| if (!i && len2) { |
| if (usbfs_snoop) { |
| dev_info(&dev->dev, "bulk read: data "); |
| for (j = 0; j < len2; ++j) |
| printk("%02x ", (unsigned char)(tbuf)[j]); |
| printk("\n"); |
| } |
| if (copy_to_user(bulk.data, tbuf, len2)) { |
| kfree(tbuf); |
| return -EFAULT; |
| } |
| } |
| } else { |
| if (len1) { |
| if (copy_from_user(tbuf, bulk.data, len1)) { |
| kfree(tbuf); |
| return -EFAULT; |
| } |
| } |
| snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
| bulk.len, bulk.timeout); |
| if (usbfs_snoop) { |
| dev_info(&dev->dev, "bulk write: data: "); |
| for (j = 0; j < len1; ++j) |
| printk("%02x ", (unsigned char)(tbuf)[j]); |
| printk("\n"); |
| } |
| usb_unlock_device(dev); |
| i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| usb_lock_device(dev); |
| } |
| kfree(tbuf); |
| if (i < 0) |
| return i; |
| return len2; |
| } |
| |
| static int proc_resetep(struct dev_state *ps, void __user *arg) |
| { |
| unsigned int ep; |
| int ret; |
| |
| if (get_user(ep, (unsigned int __user *)arg)) |
| return -EFAULT; |
| if ((ret = findintfep(ps->dev, ep)) < 0) |
| return ret; |
| if ((ret = checkintf(ps, ret))) |
| return ret; |
| usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); |
| return 0; |
| } |
| |
| static int proc_clearhalt(struct dev_state *ps, void __user *arg) |
| { |
| unsigned int ep; |
| int pipe; |
| int ret; |
| |
| if (get_user(ep, (unsigned int __user *)arg)) |
| return -EFAULT; |
| if ((ret = findintfep(ps->dev, ep)) < 0) |
| return ret; |
| if ((ret = checkintf(ps, ret))) |
| return ret; |
| if (ep & USB_DIR_IN) |
| pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
| else |
| pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); |
| |
| return usb_clear_halt(ps->dev, pipe); |
| } |
| |
| |
| static int proc_getdriver(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_getdriver gd; |
| struct usb_interface *intf; |
| int ret; |
| |
| if (copy_from_user(&gd, arg, sizeof(gd))) |
| return -EFAULT; |
| down_read(&usb_bus_type.subsys.rwsem); |
| intf = usb_ifnum_to_if(ps->dev, gd.interface); |
| if (!intf || !intf->dev.driver) |
| ret = -ENODATA; |
| else { |
| strncpy(gd.driver, intf->dev.driver->name, |
| sizeof(gd.driver)); |
| ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); |
| } |
| up_read(&usb_bus_type.subsys.rwsem); |
| return ret; |
| } |
| |
| static int proc_connectinfo(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_connectinfo ci; |
| |
| ci.devnum = ps->dev->devnum; |
| ci.slow = ps->dev->speed == USB_SPEED_LOW; |
| if (copy_to_user(arg, &ci, sizeof(ci))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int proc_resetdevice(struct dev_state *ps) |
| { |
| return usb_reset_device(ps->dev); |
| |
| } |
| |
| static int proc_setintf(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_setinterface setintf; |
| int ret; |
| |
| if (copy_from_user(&setintf, arg, sizeof(setintf))) |
| return -EFAULT; |
| if ((ret = checkintf(ps, setintf.interface))) |
| return ret; |
| return usb_set_interface(ps->dev, setintf.interface, |
| setintf.altsetting); |
| } |
| |
| static int proc_setconfig(struct dev_state *ps, void __user *arg) |
| { |
| unsigned int u; |
| int status = 0; |
| struct usb_host_config *actconfig; |
| |
| if (get_user(u, (unsigned int __user *)arg)) |
| return -EFAULT; |
| |
| actconfig = ps->dev->actconfig; |
| |
| /* Don't touch the device if any interfaces are claimed. |
| * It could interfere with other drivers' operations, and if |
| * an interface is claimed by usbfs it could easily deadlock. |
| */ |
| if (actconfig) { |
| int i; |
| |
| for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { |
| if (usb_interface_claimed(actconfig->interface[i])) { |
| dev_warn (&ps->dev->dev, |
| "usbfs: interface %d claimed by %s " |
| "while '%s' sets config #%d\n", |
| actconfig->interface[i] |
| ->cur_altsetting |
| ->desc.bInterfaceNumber, |
| actconfig->interface[i] |
| ->dev.driver->name, |
| current->comm, u); |
| status = -EBUSY; |
| break; |
| } |
| } |
| } |
| |
| /* SET_CONFIGURATION is often abused as a "cheap" driver reset, |
| * so avoid usb_set_configuration()'s kick to sysfs |
| */ |
| if (status == 0) { |
| if (actconfig && actconfig->desc.bConfigurationValue == u) |
| status = usb_reset_configuration(ps->dev); |
| else |
| status = usb_set_configuration(ps->dev, u); |
| } |
| |
| return status; |
| } |
| |
| static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
| struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
| void __user *arg) |
| { |
| struct usbdevfs_iso_packet_desc *isopkt = NULL; |
| struct usb_host_endpoint *ep; |
| struct async *as; |
| struct usb_ctrlrequest *dr = NULL; |
| unsigned int u, totlen, isofrmlen; |
| int ret, interval = 0, ifnum = -1; |
| |
| if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| |
| URB_NO_FSBR|URB_ZERO_PACKET)) |
| return -EINVAL; |
| if (!uurb->buffer) |
| return -EINVAL; |
| if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) |
| return -EINVAL; |
| if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { |
| if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) |
| return ifnum; |
| if ((ret = checkintf(ps, ifnum))) |
| return ret; |
| } |
| if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) |
| ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| else |
| ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| if (!ep) |
| return -ENOENT; |
| switch(uurb->type) { |
| case USBDEVFS_URB_TYPE_CONTROL: |
| if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| != USB_ENDPOINT_XFER_CONTROL) |
| return -EINVAL; |
| /* min 8 byte setup packet, max arbitrary */ |
| if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE) |
| return -EINVAL; |
| if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) |
| return -ENOMEM; |
| if (copy_from_user(dr, uurb->buffer, 8)) { |
| kfree(dr); |
| return -EFAULT; |
| } |
| if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { |
| kfree(dr); |
| return -EINVAL; |
| } |
| if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { |
| kfree(dr); |
| return ret; |
| } |
| uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); |
| uurb->number_of_packets = 0; |
| uurb->buffer_length = le16_to_cpup(&dr->wLength); |
| uurb->buffer += 8; |
| if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { |
| kfree(dr); |
| return -EFAULT; |
| } |
| snoop(&ps->dev->dev, "control urb\n"); |
| break; |
| |
| case USBDEVFS_URB_TYPE_BULK: |
| switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
| case USB_ENDPOINT_XFER_CONTROL: |
| case USB_ENDPOINT_XFER_ISOC: |
| return -EINVAL; |
| /* allow single-shot interrupt transfers, at bogus rates */ |
| } |
| uurb->number_of_packets = 0; |
| if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| return -EINVAL; |
| if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) |
| return -EFAULT; |
| snoop(&ps->dev->dev, "bulk urb\n"); |
| break; |
| |
| case USBDEVFS_URB_TYPE_ISO: |
| /* arbitrary limit */ |
| if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) |
| return -EINVAL; |
| if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| != USB_ENDPOINT_XFER_ISOC) |
| return -EINVAL; |
| interval = 1 << min (15, ep->desc.bInterval - 1); |
| isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; |
| if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
| return -ENOMEM; |
| if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { |
| kfree(isopkt); |
| return -EFAULT; |
| } |
| for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
| if (isopkt[u].length > 1023) { |
| kfree(isopkt); |
| return -EINVAL; |
| } |
| totlen += isopkt[u].length; |
| } |
| if (totlen > 32768) { |
| kfree(isopkt); |
| return -EINVAL; |
| } |
| uurb->buffer_length = totlen; |
| snoop(&ps->dev->dev, "iso urb\n"); |
| break; |
| |
| case USBDEVFS_URB_TYPE_INTERRUPT: |
| uurb->number_of_packets = 0; |
| if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| != USB_ENDPOINT_XFER_INT) |
| return -EINVAL; |
| if (ps->dev->speed == USB_SPEED_HIGH) |
| interval = 1 << min (15, ep->desc.bInterval - 1); |
| else |
| interval = ep->desc.bInterval; |
| if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| return -EINVAL; |
| if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) |
| return -EFAULT; |
| snoop(&ps->dev->dev, "interrupt urb\n"); |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| if (!(as = alloc_async(uurb->number_of_packets))) { |
| kfree(isopkt); |
| kfree(dr); |
| return -ENOMEM; |
| } |
| if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { |
| kfree(isopkt); |
| kfree(dr); |
| free_async(as); |
| return -ENOMEM; |
| } |
| as->urb->dev = ps->dev; |
| as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); |
| as->urb->transfer_flags = uurb->flags; |
| as->urb->transfer_buffer_length = uurb->buffer_length; |
| as->urb->setup_packet = (unsigned char*)dr; |
| as->urb->start_frame = uurb->start_frame; |
| as->urb->number_of_packets = uurb->number_of_packets; |
| as->urb->interval = interval; |
| as->urb->context = as; |
| as->urb->complete = async_completed; |
| for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
| as->urb->iso_frame_desc[u].offset = totlen; |
| as->urb->iso_frame_desc[u].length = isopkt[u].length; |
| totlen += isopkt[u].length; |
| } |
| kfree(isopkt); |
| as->ps = ps; |
| as->userurb = arg; |
| if (uurb->endpoint & USB_DIR_IN) |
| as->userbuffer = uurb->buffer; |
| else |
| as->userbuffer = NULL; |
| as->signr = uurb->signr; |
| as->ifnum = ifnum; |
| as->pid = current->pid; |
| as->uid = current->uid; |
| as->euid = current->euid; |
| if (!(uurb->endpoint & USB_DIR_IN)) { |
| if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { |
| free_async(as); |
| return -EFAULT; |
| } |
| } |
| snoop(&as->urb->dev->dev, "submit urb\n"); |
| snoop_urb(as->urb, as->userurb); |
| async_newpending(as); |
| if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { |
| dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); |
| async_removepending(as); |
| free_async(as); |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int proc_submiturb(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_urb uurb; |
| |
| if (copy_from_user(&uurb, arg, sizeof(uurb))) |
| return -EFAULT; |
| |
| return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
| } |
| |
| static int proc_unlinkurb(struct dev_state *ps, void __user *arg) |
| { |
| struct async *as; |
| |
| as = async_getpending(ps, arg); |
| if (!as) |
| return -EINVAL; |
| usb_kill_urb(as->urb); |
| return 0; |
| } |
| |
| static int processcompl(struct async *as, void __user * __user *arg) |
| { |
| struct urb *urb = as->urb; |
| struct usbdevfs_urb __user *userurb = as->userurb; |
| void __user *addr = as->userurb; |
| unsigned int i; |
| |
| if (as->userbuffer) |
| if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) |
| return -EFAULT; |
| if (put_user(urb->status, &userurb->status)) |
| return -EFAULT; |
| if (put_user(urb->actual_length, &userurb->actual_length)) |
| return -EFAULT; |
| if (put_user(urb->error_count, &userurb->error_count)) |
| return -EFAULT; |
| |
| if (usb_pipeisoc(urb->pipe)) { |
| for (i = 0; i < urb->number_of_packets; i++) { |
| if (put_user(urb->iso_frame_desc[i].actual_length, |
| &userurb->iso_frame_desc[i].actual_length)) |
| return -EFAULT; |
| if (put_user(urb->iso_frame_desc[i].status, |
| &userurb->iso_frame_desc[i].status)) |
| return -EFAULT; |
| } |
| } |
| |
| free_async(as); |
| |
| if (put_user(addr, (void __user * __user *)arg)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static struct async* reap_as(struct dev_state *ps) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| struct async *as = NULL; |
| struct usb_device *dev = ps->dev; |
| |
| add_wait_queue(&ps->wait, &wait); |
| for (;;) { |
| __set_current_state(TASK_INTERRUPTIBLE); |
| if ((as = async_getcompleted(ps))) |
| break; |
| if (signal_pending(current)) |
| break; |
| usb_unlock_device(dev); |
| schedule(); |
| usb_lock_device(dev); |
| } |
| remove_wait_queue(&ps->wait, &wait); |
| set_current_state(TASK_RUNNING); |
| return as; |
| } |
| |
| static int proc_reapurb(struct dev_state *ps, void __user *arg) |
| { |
| struct async *as = reap_as(ps); |
| if (as) |
| return processcompl(as, (void __user * __user *)arg); |
| if (signal_pending(current)) |
| return -EINTR; |
| return -EIO; |
| } |
| |
| static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) |
| { |
| struct async *as; |
| |
| if (!(as = async_getcompleted(ps))) |
| return -EAGAIN; |
| return processcompl(as, (void __user * __user *)arg); |
| } |
| |
| #ifdef CONFIG_COMPAT |
| |
| static int get_urb32(struct usbdevfs_urb *kurb, |
| struct usbdevfs_urb32 __user *uurb) |
| { |
| __u32 uptr; |
| if (get_user(kurb->type, &uurb->type) || |
| __get_user(kurb->endpoint, &uurb->endpoint) || |
| __get_user(kurb->status, &uurb->status) || |
| __get_user(kurb->flags, &uurb->flags) || |
| __get_user(kurb->buffer_length, &uurb->buffer_length) || |
| __get_user(kurb->actual_length, &uurb->actual_length) || |
| __get_user(kurb->start_frame, &uurb->start_frame) || |
| __get_user(kurb->number_of_packets, &uurb->number_of_packets) || |
| __get_user(kurb->error_count, &uurb->error_count) || |
| __get_user(kurb->signr, &uurb->signr)) |
| return -EFAULT; |
| |
| if (__get_user(uptr, &uurb->buffer)) |
| return -EFAULT; |
| kurb->buffer = compat_ptr(uptr); |
| if (__get_user(uptr, &uurb->buffer)) |
| return -EFAULT; |
| kurb->usercontext = compat_ptr(uptr); |
| |
| return 0; |
| } |
| |
| static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_urb uurb; |
| |
| if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) |
| return -EFAULT; |
| |
| return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
| } |
| |
| static int processcompl_compat(struct async *as, void __user * __user *arg) |
| { |
| struct urb *urb = as->urb; |
| struct usbdevfs_urb32 __user *userurb = as->userurb; |
| void __user *addr = as->userurb; |
| unsigned int i; |
| |
| if (as->userbuffer) |
| if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) |
| return -EFAULT; |
| if (put_user(urb->status, &userurb->status)) |
| return -EFAULT; |
| if (put_user(urb->actual_length, &userurb->actual_length)) |
| return -EFAULT; |
| if (put_user(urb->error_count, &userurb->error_count)) |
| return -EFAULT; |
| |
| if (usb_pipeisoc(urb->pipe)) { |
| for (i = 0; i < urb->number_of_packets; i++) { |
| if (put_user(urb->iso_frame_desc[i].actual_length, |
| &userurb->iso_frame_desc[i].actual_length)) |
| return -EFAULT; |
| if (put_user(urb->iso_frame_desc[i].status, |
| &userurb->iso_frame_desc[i].status)) |
| return -EFAULT; |
| } |
| } |
| |
| free_async(as); |
| if (put_user((u32)(u64)addr, (u32 __user *)arg)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) |
| { |
| struct async *as = reap_as(ps); |
| if (as) |
| return processcompl_compat(as, (void __user * __user *)arg); |
| if (signal_pending(current)) |
| return -EINTR; |
| return -EIO; |
| } |
| |
| static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) |
| { |
| struct async *as; |
| |
| if (!(as = async_getcompleted(ps))) |
| return -EAGAIN; |
| return processcompl_compat(as, (void __user * __user *)arg); |
| } |
| |
| #endif |
| |
| static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_disconnectsignal ds; |
| |
| if (copy_from_user(&ds, arg, sizeof(ds))) |
| return -EFAULT; |
| if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) |
| return -EINVAL; |
| ps->discsignr = ds.signr; |
| ps->disccontext = ds.context; |
| return 0; |
| } |
| |
| static int proc_claiminterface(struct dev_state *ps, void __user *arg) |
| { |
| unsigned int ifnum; |
| |
| if (get_user(ifnum, (unsigned int __user *)arg)) |
| return -EFAULT; |
| return claimintf(ps, ifnum); |
| } |
| |
| static int proc_releaseinterface(struct dev_state *ps, void __user *arg) |
| { |
| unsigned int ifnum; |
| int ret; |
| |
| if (get_user(ifnum, (unsigned int __user *)arg)) |
| return -EFAULT; |
| if ((ret = releaseintf(ps, ifnum)) < 0) |
| return ret; |
| destroy_async_on_interface (ps, ifnum); |
| return 0; |
| } |
| |
| static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
| { |
| int size; |
| void *buf = NULL; |
| int retval = 0; |
| struct usb_interface *intf = NULL; |
| struct usb_driver *driver = NULL; |
| |
| /* alloc buffer */ |
| if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { |
| if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
| return -ENOMEM; |
| if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
| if (copy_from_user (buf, ctl->data, size)) { |
| kfree(buf); |
| return -EFAULT; |
| } |
| } else { |
| memset (buf, 0, size); |
| } |
| } |
| |
| if (!connected(ps->dev)) { |
| kfree(buf); |
| return -ENODEV; |
| } |
| |
| if (ps->dev->state != USB_STATE_CONFIGURED) |
| retval = -EHOSTUNREACH; |
| else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
| retval = -EINVAL; |
| else switch (ctl->ioctl_code) { |
| |
| /* disconnect kernel driver from interface */ |
| case USBDEVFS_DISCONNECT: |
| |
| down_write(&usb_bus_type.subsys.rwsem); |
| if (intf->dev.driver) { |
| driver = to_usb_driver(intf->dev.driver); |
| dev_dbg (&intf->dev, "disconnect by usbfs\n"); |
| usb_driver_release_interface(driver, intf); |
| } else |
| retval = -ENODATA; |
| up_write(&usb_bus_type.subsys.rwsem); |
| break; |
| |
| /* let kernel drivers try to (re)bind to the interface */ |
| case USBDEVFS_CONNECT: |
| usb_unlock_device(ps->dev); |
| usb_lock_all_devices(); |
| bus_rescan_devices(intf->dev.bus); |
| usb_unlock_all_devices(); |
| usb_lock_device(ps->dev); |
| break; |
| |
| /* talk directly to the interface's driver */ |
| default: |
| down_read(&usb_bus_type.subsys.rwsem); |
| if (intf->dev.driver) |
| driver = to_usb_driver(intf->dev.driver); |
| if (driver == NULL || driver->ioctl == NULL) { |
| retval = -ENOTTY; |
| } else { |
| retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
| if (retval == -ENOIOCTLCMD) |
| retval = -ENOTTY; |
| } |
| up_read(&usb_bus_type.subsys.rwsem); |
| } |
| |
| /* cleanup and return */ |
| if (retval >= 0 |
| && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
| && size > 0 |
| && copy_to_user (ctl->data, buf, size) != 0) |
| retval = -EFAULT; |
| |
| kfree(buf); |
| return retval; |
| } |
| |
| static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
| { |
| struct usbdevfs_ioctl ctrl; |
| |
| if (copy_from_user(&ctrl, arg, sizeof (ctrl))) |
| return -EFAULT; |
| return proc_ioctl(ps, &ctrl); |
| } |
| |
| #ifdef CONFIG_COMPAT |
| static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
| { |
| struct usbdevfs_ioctl32 __user *uioc; |
| struct usbdevfs_ioctl ctrl; |
| u32 udata; |
| |
| uioc = compat_ptr(arg); |
| if (get_user(ctrl.ifno, &uioc->ifno) || |
| get_user(ctrl.ioctl_code, &uioc->ioctl_code) || |
| __get_user(udata, &uioc->data)) |
| return -EFAULT; |
| ctrl.data = compat_ptr(udata); |
| |
| return proc_ioctl(ps, &ctrl); |
| } |
| #endif |
| |
| /* |
| * NOTE: All requests here that have interface numbers as parameters |
| * are assuming that somehow the configuration has been prevented from |
| * changing. But there's no mechanism to ensure that... |
| */ |
| static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| struct dev_state *ps = (struct dev_state *)file->private_data; |
| struct usb_device *dev = ps->dev; |
| void __user *p = (void __user *)arg; |
| int ret = -ENOTTY; |
| |
| if (!(file->f_mode & FMODE_WRITE)) |
| return -EPERM; |
| usb_lock_device(dev); |
| if (!connected(dev)) { |
| usb_unlock_device(dev); |
| return -ENODEV; |
| } |
| |
| switch (cmd) { |
| case USBDEVFS_CONTROL: |
| snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); |
| ret = proc_control(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| case USBDEVFS_BULK: |
| snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); |
| ret = proc_bulk(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| case USBDEVFS_RESETEP: |
| snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); |
| ret = proc_resetep(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| case USBDEVFS_RESET: |
| snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); |
| ret = proc_resetdevice(ps); |
| break; |
| |
| case USBDEVFS_CLEAR_HALT: |
| snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); |
| ret = proc_clearhalt(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| case USBDEVFS_GETDRIVER: |
| snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); |
| ret = proc_getdriver(ps, p); |
| break; |
| |
| case USBDEVFS_CONNECTINFO: |
| snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); |
| ret = proc_connectinfo(ps, p); |
| break; |
| |
| case USBDEVFS_SETINTERFACE: |
| snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); |
| ret = proc_setintf(ps, p); |
| break; |
| |
| case USBDEVFS_SETCONFIGURATION: |
| snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); |
| ret = proc_setconfig(ps, p); |
| break; |
| |
| case USBDEVFS_SUBMITURB: |
| snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); |
| ret = proc_submiturb(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| #ifdef CONFIG_COMPAT |
| |
| case USBDEVFS_SUBMITURB32: |
| snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); |
| ret = proc_submiturb_compat(ps, p); |
| if (ret >= 0) |
| inode->i_mtime = CURRENT_TIME; |
| break; |
| |
| case USBDEVFS_REAPURB32: |
| snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); |
| ret = proc_reapurb_compat(ps, p); |
| break; |
| |
| case USBDEVFS_REAPURBNDELAY32: |
| snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); |
| ret = proc_reapurbnonblock_compat(ps, p); |
| break; |
| |
| case USBDEVFS_IOCTL32: |
| snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); |
| ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p); |
| break; |
| #endif |
| |
| case USBDEVFS_DISCARDURB: |
| snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); |
| ret = proc_unlinkurb(ps, p); |
| break; |
| |
| case USBDEVFS_REAPURB: |
| snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); |
| ret = proc_reapurb(ps, p); |
| break; |
| |
| case USBDEVFS_REAPURBNDELAY: |
| snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); |
| ret = proc_reapurbnonblock(ps, p); |
| break; |
| |
| case USBDEVFS_DISCSIGNAL: |
| snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); |
| ret = proc_disconnectsignal(ps, p); |
| break; |
| |
| case USBDEVFS_CLAIMINTERFACE: |
| snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); |
| ret = proc_claiminterface(ps, p); |
| break; |
| |
| case USBDEVFS_RELEASEINTERFACE: |
| snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); |
| ret = proc_releaseinterface(ps, p); |
| break; |
| |
| case USBDEVFS_IOCTL: |
| snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); |
| ret = proc_ioctl_default(ps, p); |
| break; |
| } |
| usb_unlock_device(dev); |
| if (ret >= 0) |
| inode->i_atime = CURRENT_TIME; |
| return ret; |
| } |
| |
| /* No kernel lock - fine */ |
| static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) |
| { |
| struct dev_state *ps = (struct dev_state *)file->private_data; |
| unsigned int mask = 0; |
| |
| poll_wait(file, &ps->wait, wait); |
| if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) |
| mask |= POLLOUT | POLLWRNORM; |
| if (!connected(ps->dev)) |
| mask |= POLLERR | POLLHUP; |
| return mask; |
| } |
| |
| struct file_operations usbfs_device_file_operations = { |
| .llseek = usbdev_lseek, |
| .read = usbdev_read, |
| .poll = usbdev_poll, |
| .ioctl = usbdev_ioctl, |
| .open = usbdev_open, |
| .release = usbdev_release, |
| }; |
| |
| static void usbdev_add(struct usb_device *dev) |
| { |
| int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); |
| |
| dev->class_dev = class_device_create(usb_device_class, NULL, |
| MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev, |
| "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
| |
| dev->class_dev->class_data = dev; |
| } |
| |
| static void usbdev_remove(struct usb_device *dev) |
| { |
| class_device_unregister(dev->class_dev); |
| } |
| |
| static int usbdev_notify(struct notifier_block *self, unsigned long action, |
| void *dev) |
| { |
| switch (action) { |
| case USB_DEVICE_ADD: |
| usbdev_add(dev); |
| break; |
| case USB_DEVICE_REMOVE: |
| usbdev_remove(dev); |
| break; |
| } |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block usbdev_nb = { |
| .notifier_call = usbdev_notify, |
| }; |
| |
| static struct cdev usb_device_cdev = { |
| .kobj = {.name = "usb_device", }, |
| .owner = THIS_MODULE, |
| }; |
| |
| int __init usbdev_init(void) |
| { |
| int retval; |
| |
| retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
| "usb_device"); |
| if (retval) { |
| err("unable to register minors for usb_device"); |
| goto out; |
| } |
| cdev_init(&usb_device_cdev, &usbfs_device_file_operations); |
| retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
| if (retval) { |
| err("unable to get usb_device major %d", USB_DEVICE_MAJOR); |
| goto error_cdev; |
| } |
| usb_device_class = class_create(THIS_MODULE, "usb_device"); |
| if (IS_ERR(usb_device_class)) { |
| err("unable to register usb_device class"); |
| retval = PTR_ERR(usb_device_class); |
| goto error_class; |
| } |
| |
| usb_register_notify(&usbdev_nb); |
| |
| out: |
| return retval; |
| |
| error_class: |
| usb_device_class = NULL; |
| cdev_del(&usb_device_cdev); |
| |
| error_cdev: |
| unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
| goto out; |
| } |
| |
| void usbdev_cleanup(void) |
| { |
| usb_unregister_notify(&usbdev_nb); |
| class_destroy(usb_device_class); |
| cdev_del(&usb_device_cdev); |
| unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
| } |
| |