196c27377SValentina Manea /* 296c27377SValentina Manea * Copyright (C) 2003-2008 Takahiro Hirofuchi 396c27377SValentina Manea * 496c27377SValentina Manea * This is free software; you can redistribute it and/or modify 596c27377SValentina Manea * it under the terms of the GNU General Public License as published by 696c27377SValentina Manea * the Free Software Foundation; either version 2 of the License, or 796c27377SValentina Manea * (at your option) any later version. 896c27377SValentina Manea * 996c27377SValentina Manea * This is distributed in the hope that it will be useful, 1096c27377SValentina Manea * but WITHOUT ANY WARRANTY; without even the implied warranty of 1196c27377SValentina Manea * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1296c27377SValentina Manea * GNU General Public License for more details. 1396c27377SValentina Manea * 1496c27377SValentina Manea * You should have received a copy of the GNU General Public License 1596c27377SValentina Manea * along with this program; if not, write to the Free Software 1696c27377SValentina Manea * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 1796c27377SValentina Manea * USA. 1896c27377SValentina Manea */ 1996c27377SValentina Manea 2096c27377SValentina Manea #include <linux/device.h> 2196c27377SValentina Manea #include <linux/file.h> 2296c27377SValentina Manea #include <linux/kthread.h> 2396c27377SValentina Manea #include <linux/module.h> 2496c27377SValentina Manea 2596c27377SValentina Manea #include "usbip_common.h" 2696c27377SValentina Manea #include "stub.h" 2796c27377SValentina Manea 2896c27377SValentina Manea /* 2996c27377SValentina Manea * Define device IDs here if you want to explicitly limit exportable devices. 3096c27377SValentina Manea * In most cases, wildcard matching will be okay because driver binding can be 3196c27377SValentina Manea * changed dynamically by a userland program. 3296c27377SValentina Manea */ 3396c27377SValentina Manea static struct usb_device_id stub_table[] = { 3496c27377SValentina Manea #if 0 3596c27377SValentina Manea /* just an example */ 3696c27377SValentina Manea { USB_DEVICE(0x05ac, 0x0301) }, /* Mac 1 button mouse */ 3796c27377SValentina Manea { USB_DEVICE(0x0430, 0x0009) }, /* Plat Home Keyboard */ 3896c27377SValentina Manea { USB_DEVICE(0x059b, 0x0001) }, /* Iomega USB Zip 100 */ 3996c27377SValentina Manea { USB_DEVICE(0x04b3, 0x4427) }, /* IBM USB CD-ROM */ 4096c27377SValentina Manea { USB_DEVICE(0x05a9, 0xa511) }, /* LifeView USB cam */ 4196c27377SValentina Manea { USB_DEVICE(0x55aa, 0x0201) }, /* Imation card reader */ 4296c27377SValentina Manea { USB_DEVICE(0x046d, 0x0870) }, /* Qcam Express(QV-30) */ 4396c27377SValentina Manea { USB_DEVICE(0x04bb, 0x0101) }, /* IO-DATA HD 120GB */ 4496c27377SValentina Manea { USB_DEVICE(0x04bb, 0x0904) }, /* IO-DATA USB-ET/TX */ 4596c27377SValentina Manea { USB_DEVICE(0x04bb, 0x0201) }, /* IO-DATA USB-ET/TX */ 4696c27377SValentina Manea { USB_DEVICE(0x08bb, 0x2702) }, /* ONKYO USB Speaker */ 4796c27377SValentina Manea { USB_DEVICE(0x046d, 0x08b2) }, /* Logicool Qcam 4000 Pro */ 4896c27377SValentina Manea #endif 4996c27377SValentina Manea /* magic for wild card */ 5096c27377SValentina Manea { .driver_info = 1 }, 5196c27377SValentina Manea { 0, } /* Terminating entry */ 5296c27377SValentina Manea }; 5396c27377SValentina Manea MODULE_DEVICE_TABLE(usb, stub_table); 5496c27377SValentina Manea 5596c27377SValentina Manea /* 5696c27377SValentina Manea * usbip_status shows the status of usbip-host as long as this driver is bound 5796c27377SValentina Manea * to the target device. 5896c27377SValentina Manea */ 5996c27377SValentina Manea static ssize_t usbip_status_show(struct device *dev, 6096c27377SValentina Manea struct device_attribute *attr, char *buf) 6196c27377SValentina Manea { 6296c27377SValentina Manea struct stub_device *sdev = dev_get_drvdata(dev); 6396c27377SValentina Manea int status; 6496c27377SValentina Manea 6596c27377SValentina Manea if (!sdev) { 6696c27377SValentina Manea dev_err(dev, "sdev is null\n"); 6796c27377SValentina Manea return -ENODEV; 6896c27377SValentina Manea } 6996c27377SValentina Manea 7096c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 7196c27377SValentina Manea status = sdev->ud.status; 7296c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 7396c27377SValentina Manea 7496c27377SValentina Manea return snprintf(buf, PAGE_SIZE, "%d\n", status); 7596c27377SValentina Manea } 7696c27377SValentina Manea static DEVICE_ATTR_RO(usbip_status); 7796c27377SValentina Manea 7896c27377SValentina Manea /* 7996c27377SValentina Manea * usbip_sockfd gets a socket descriptor of an established TCP connection that 8096c27377SValentina Manea * is used to transfer usbip requests by kernel threads. -1 is a magic number 8196c27377SValentina Manea * by which usbip connection is finished. 8296c27377SValentina Manea */ 8396c27377SValentina Manea static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr, 8496c27377SValentina Manea const char *buf, size_t count) 8596c27377SValentina Manea { 8696c27377SValentina Manea struct stub_device *sdev = dev_get_drvdata(dev); 8796c27377SValentina Manea int sockfd = 0; 8896c27377SValentina Manea struct socket *socket; 8996c27377SValentina Manea int rv; 9096c27377SValentina Manea 9196c27377SValentina Manea if (!sdev) { 9296c27377SValentina Manea dev_err(dev, "sdev is null\n"); 9396c27377SValentina Manea return -ENODEV; 9496c27377SValentina Manea } 9596c27377SValentina Manea 9696c27377SValentina Manea rv = sscanf(buf, "%d", &sockfd); 9796c27377SValentina Manea if (rv != 1) 9896c27377SValentina Manea return -EINVAL; 9996c27377SValentina Manea 10096c27377SValentina Manea if (sockfd != -1) { 10196c27377SValentina Manea int err; 10296c27377SValentina Manea 10396c27377SValentina Manea dev_info(dev, "stub up\n"); 10496c27377SValentina Manea 10596c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 10696c27377SValentina Manea 10796c27377SValentina Manea if (sdev->ud.status != SDEV_ST_AVAILABLE) { 10896c27377SValentina Manea dev_err(dev, "not ready\n"); 10996c27377SValentina Manea goto err; 11096c27377SValentina Manea } 11196c27377SValentina Manea 11296c27377SValentina Manea socket = sockfd_lookup(sockfd, &err); 11396c27377SValentina Manea if (!socket) 11496c27377SValentina Manea goto err; 11596c27377SValentina Manea 11696c27377SValentina Manea sdev->ud.tcp_socket = socket; 11796c27377SValentina Manea 11896c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 11996c27377SValentina Manea 12096c27377SValentina Manea sdev->ud.tcp_rx = kthread_get_run(stub_rx_loop, &sdev->ud, 12196c27377SValentina Manea "stub_rx"); 12296c27377SValentina Manea sdev->ud.tcp_tx = kthread_get_run(stub_tx_loop, &sdev->ud, 12396c27377SValentina Manea "stub_tx"); 12496c27377SValentina Manea 12596c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 12696c27377SValentina Manea sdev->ud.status = SDEV_ST_USED; 12796c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 12896c27377SValentina Manea 12996c27377SValentina Manea } else { 13096c27377SValentina Manea dev_info(dev, "stub down\n"); 13196c27377SValentina Manea 13296c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 13396c27377SValentina Manea if (sdev->ud.status != SDEV_ST_USED) 13496c27377SValentina Manea goto err; 13596c27377SValentina Manea 13696c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 13796c27377SValentina Manea 13896c27377SValentina Manea usbip_event_add(&sdev->ud, SDEV_EVENT_DOWN); 13996c27377SValentina Manea } 14096c27377SValentina Manea 14196c27377SValentina Manea return count; 14296c27377SValentina Manea 14396c27377SValentina Manea err: 14496c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 14596c27377SValentina Manea return -EINVAL; 14696c27377SValentina Manea } 14796c27377SValentina Manea static DEVICE_ATTR(usbip_sockfd, S_IWUSR, NULL, store_sockfd); 14896c27377SValentina Manea 14996c27377SValentina Manea static int stub_add_files(struct device *dev) 15096c27377SValentina Manea { 15196c27377SValentina Manea int err = 0; 15296c27377SValentina Manea 15396c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_status); 15496c27377SValentina Manea if (err) 15596c27377SValentina Manea goto err_status; 15696c27377SValentina Manea 15796c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_sockfd); 15896c27377SValentina Manea if (err) 15996c27377SValentina Manea goto err_sockfd; 16096c27377SValentina Manea 16196c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_debug); 16296c27377SValentina Manea if (err) 16396c27377SValentina Manea goto err_debug; 16496c27377SValentina Manea 16596c27377SValentina Manea return 0; 16696c27377SValentina Manea 16796c27377SValentina Manea err_debug: 16896c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_sockfd); 16996c27377SValentina Manea err_sockfd: 17096c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_status); 17196c27377SValentina Manea err_status: 17296c27377SValentina Manea return err; 17396c27377SValentina Manea } 17496c27377SValentina Manea 17596c27377SValentina Manea static void stub_remove_files(struct device *dev) 17696c27377SValentina Manea { 17796c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_status); 17896c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_sockfd); 17996c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_debug); 18096c27377SValentina Manea } 18196c27377SValentina Manea 18296c27377SValentina Manea static void stub_shutdown_connection(struct usbip_device *ud) 18396c27377SValentina Manea { 18496c27377SValentina Manea struct stub_device *sdev = container_of(ud, struct stub_device, ud); 18596c27377SValentina Manea 18696c27377SValentina Manea /* 18796c27377SValentina Manea * When removing an exported device, kernel panic sometimes occurred 18896c27377SValentina Manea * and then EIP was sk_wait_data of stub_rx thread. Is this because 18996c27377SValentina Manea * sk_wait_data returned though stub_rx thread was already finished by 19096c27377SValentina Manea * step 1? 19196c27377SValentina Manea */ 19296c27377SValentina Manea if (ud->tcp_socket) { 19396c27377SValentina Manea dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n", 19496c27377SValentina Manea ud->tcp_socket); 19596c27377SValentina Manea kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); 19696c27377SValentina Manea } 19796c27377SValentina Manea 19896c27377SValentina Manea /* 1. stop threads */ 19996c27377SValentina Manea if (ud->tcp_rx) { 20096c27377SValentina Manea kthread_stop_put(ud->tcp_rx); 20196c27377SValentina Manea ud->tcp_rx = NULL; 20296c27377SValentina Manea } 20396c27377SValentina Manea if (ud->tcp_tx) { 20496c27377SValentina Manea kthread_stop_put(ud->tcp_tx); 20596c27377SValentina Manea ud->tcp_tx = NULL; 20696c27377SValentina Manea } 20796c27377SValentina Manea 20896c27377SValentina Manea /* 20996c27377SValentina Manea * 2. close the socket 21096c27377SValentina Manea * 21196c27377SValentina Manea * tcp_socket is freed after threads are killed so that usbip_xmit does 21296c27377SValentina Manea * not touch NULL socket. 21396c27377SValentina Manea */ 21496c27377SValentina Manea if (ud->tcp_socket) { 21596c27377SValentina Manea sockfd_put(ud->tcp_socket); 21696c27377SValentina Manea ud->tcp_socket = NULL; 21796c27377SValentina Manea } 21896c27377SValentina Manea 21996c27377SValentina Manea /* 3. free used data */ 22096c27377SValentina Manea stub_device_cleanup_urbs(sdev); 22196c27377SValentina Manea 22296c27377SValentina Manea /* 4. free stub_unlink */ 22396c27377SValentina Manea { 22496c27377SValentina Manea unsigned long flags; 22596c27377SValentina Manea struct stub_unlink *unlink, *tmp; 22696c27377SValentina Manea 22796c27377SValentina Manea spin_lock_irqsave(&sdev->priv_lock, flags); 22896c27377SValentina Manea list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) { 22996c27377SValentina Manea list_del(&unlink->list); 23096c27377SValentina Manea kfree(unlink); 23196c27377SValentina Manea } 23296c27377SValentina Manea list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free, 23396c27377SValentina Manea list) { 23496c27377SValentina Manea list_del(&unlink->list); 23596c27377SValentina Manea kfree(unlink); 23696c27377SValentina Manea } 23796c27377SValentina Manea spin_unlock_irqrestore(&sdev->priv_lock, flags); 23896c27377SValentina Manea } 23996c27377SValentina Manea } 24096c27377SValentina Manea 24196c27377SValentina Manea static void stub_device_reset(struct usbip_device *ud) 24296c27377SValentina Manea { 24396c27377SValentina Manea struct stub_device *sdev = container_of(ud, struct stub_device, ud); 24496c27377SValentina Manea struct usb_device *udev = sdev->udev; 24596c27377SValentina Manea int ret; 24696c27377SValentina Manea 24796c27377SValentina Manea dev_dbg(&udev->dev, "device reset"); 24896c27377SValentina Manea 24996c27377SValentina Manea ret = usb_lock_device_for_reset(udev, sdev->interface); 25096c27377SValentina Manea if (ret < 0) { 25196c27377SValentina Manea dev_err(&udev->dev, "lock for reset\n"); 25296c27377SValentina Manea spin_lock_irq(&ud->lock); 25396c27377SValentina Manea ud->status = SDEV_ST_ERROR; 25496c27377SValentina Manea spin_unlock_irq(&ud->lock); 25596c27377SValentina Manea return; 25696c27377SValentina Manea } 25796c27377SValentina Manea 25896c27377SValentina Manea /* try to reset the device */ 25996c27377SValentina Manea ret = usb_reset_device(udev); 26096c27377SValentina Manea usb_unlock_device(udev); 26196c27377SValentina Manea 26296c27377SValentina Manea spin_lock_irq(&ud->lock); 26396c27377SValentina Manea if (ret) { 26496c27377SValentina Manea dev_err(&udev->dev, "device reset\n"); 26596c27377SValentina Manea ud->status = SDEV_ST_ERROR; 26696c27377SValentina Manea } else { 26796c27377SValentina Manea dev_info(&udev->dev, "device reset\n"); 26896c27377SValentina Manea ud->status = SDEV_ST_AVAILABLE; 26996c27377SValentina Manea } 27096c27377SValentina Manea spin_unlock_irq(&ud->lock); 27196c27377SValentina Manea } 27296c27377SValentina Manea 27396c27377SValentina Manea static void stub_device_unusable(struct usbip_device *ud) 27496c27377SValentina Manea { 27596c27377SValentina Manea spin_lock_irq(&ud->lock); 27696c27377SValentina Manea ud->status = SDEV_ST_ERROR; 27796c27377SValentina Manea spin_unlock_irq(&ud->lock); 27896c27377SValentina Manea } 27996c27377SValentina Manea 28096c27377SValentina Manea /** 28196c27377SValentina Manea * stub_device_alloc - allocate a new stub_device struct 28296c27377SValentina Manea * @interface: usb_interface of a new device 28396c27377SValentina Manea * 28496c27377SValentina Manea * Allocates and initializes a new stub_device struct. 28596c27377SValentina Manea */ 28696c27377SValentina Manea static struct stub_device *stub_device_alloc(struct usb_device *udev) 28796c27377SValentina Manea { 28896c27377SValentina Manea struct stub_device *sdev; 28996c27377SValentina Manea int busnum = udev->bus->busnum; 29096c27377SValentina Manea int devnum = udev->devnum; 29196c27377SValentina Manea 29296c27377SValentina Manea dev_dbg(&udev->dev, "allocating stub device"); 29396c27377SValentina Manea 29496c27377SValentina Manea /* yes, it's a new device */ 29596c27377SValentina Manea sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL); 29696c27377SValentina Manea if (!sdev) 29796c27377SValentina Manea return NULL; 29896c27377SValentina Manea 29996c27377SValentina Manea sdev->udev = usb_get_dev(udev); 30096c27377SValentina Manea 30196c27377SValentina Manea /* 30296c27377SValentina Manea * devid is defined with devnum when this driver is first allocated. 30396c27377SValentina Manea * devnum may change later if a device is reset. However, devid never 30496c27377SValentina Manea * changes during a usbip connection. 30596c27377SValentina Manea */ 30696c27377SValentina Manea sdev->devid = (busnum << 16) | devnum; 30796c27377SValentina Manea sdev->ud.side = USBIP_STUB; 30896c27377SValentina Manea sdev->ud.status = SDEV_ST_AVAILABLE; 30996c27377SValentina Manea spin_lock_init(&sdev->ud.lock); 31096c27377SValentina Manea sdev->ud.tcp_socket = NULL; 31196c27377SValentina Manea 31296c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_init); 31396c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_tx); 31496c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_free); 31596c27377SValentina Manea INIT_LIST_HEAD(&sdev->unlink_free); 31696c27377SValentina Manea INIT_LIST_HEAD(&sdev->unlink_tx); 31796c27377SValentina Manea spin_lock_init(&sdev->priv_lock); 31896c27377SValentina Manea 31996c27377SValentina Manea init_waitqueue_head(&sdev->tx_waitq); 32096c27377SValentina Manea 32196c27377SValentina Manea sdev->ud.eh_ops.shutdown = stub_shutdown_connection; 32296c27377SValentina Manea sdev->ud.eh_ops.reset = stub_device_reset; 32396c27377SValentina Manea sdev->ud.eh_ops.unusable = stub_device_unusable; 32496c27377SValentina Manea 32596c27377SValentina Manea usbip_start_eh(&sdev->ud); 32696c27377SValentina Manea 32796c27377SValentina Manea dev_dbg(&udev->dev, "register new device\n"); 32896c27377SValentina Manea 32996c27377SValentina Manea return sdev; 33096c27377SValentina Manea } 33196c27377SValentina Manea 33296c27377SValentina Manea static void stub_device_free(struct stub_device *sdev) 33396c27377SValentina Manea { 33496c27377SValentina Manea kfree(sdev); 33596c27377SValentina Manea } 33696c27377SValentina Manea 33796c27377SValentina Manea static int stub_probe(struct usb_device *udev) 33896c27377SValentina Manea { 33996c27377SValentina Manea struct stub_device *sdev = NULL; 34096c27377SValentina Manea const char *udev_busid = dev_name(&udev->dev); 34196c27377SValentina Manea int err = 0; 34296c27377SValentina Manea struct bus_id_priv *busid_priv; 34396c27377SValentina Manea int rc; 34496c27377SValentina Manea 34596c27377SValentina Manea dev_dbg(&udev->dev, "Enter\n"); 34696c27377SValentina Manea 34796c27377SValentina Manea /* check we should claim or not by busid_table */ 34896c27377SValentina Manea busid_priv = get_busid_priv(udev_busid); 34996c27377SValentina Manea if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) || 35096c27377SValentina Manea (busid_priv->status == STUB_BUSID_OTHER)) { 35196c27377SValentina Manea dev_info(&udev->dev, 35296c27377SValentina Manea "%s is not in match_busid table... skip!\n", 35396c27377SValentina Manea udev_busid); 35496c27377SValentina Manea 35596c27377SValentina Manea /* 35696c27377SValentina Manea * Return value should be ENODEV or ENOXIO to continue trying 35796c27377SValentina Manea * other matched drivers by the driver core. 35896c27377SValentina Manea * See driver_probe_device() in driver/base/dd.c 35996c27377SValentina Manea */ 36096c27377SValentina Manea return -ENODEV; 36196c27377SValentina Manea } 36296c27377SValentina Manea 36396c27377SValentina Manea if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) { 36496c27377SValentina Manea dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n", 36596c27377SValentina Manea udev_busid); 36696c27377SValentina Manea return -ENODEV; 36796c27377SValentina Manea } 36896c27377SValentina Manea 36996c27377SValentina Manea if (!strcmp(udev->bus->bus_name, "vhci_hcd")) { 37096c27377SValentina Manea dev_dbg(&udev->dev, 37196c27377SValentina Manea "%s is attached on vhci_hcd... skip!\n", 37296c27377SValentina Manea udev_busid); 37396c27377SValentina Manea 37496c27377SValentina Manea return -ENODEV; 37596c27377SValentina Manea } 37696c27377SValentina Manea 37796c27377SValentina Manea /* ok, this is my device */ 37896c27377SValentina Manea sdev = stub_device_alloc(udev); 37996c27377SValentina Manea if (!sdev) 38096c27377SValentina Manea return -ENOMEM; 38196c27377SValentina Manea 38296c27377SValentina Manea dev_info(&udev->dev, 38396c27377SValentina Manea "usbip-host: register new device (bus %u dev %u)\n", 38496c27377SValentina Manea udev->bus->busnum, udev->devnum); 38596c27377SValentina Manea 38696c27377SValentina Manea busid_priv->shutdown_busid = 0; 38796c27377SValentina Manea 38896c27377SValentina Manea /* set private data to usb_device */ 38996c27377SValentina Manea dev_set_drvdata(&udev->dev, sdev); 39096c27377SValentina Manea busid_priv->sdev = sdev; 39196c27377SValentina Manea busid_priv->udev = udev; 39296c27377SValentina Manea 39396c27377SValentina Manea /* 39496c27377SValentina Manea * Claim this hub port. 39596c27377SValentina Manea * It doesn't matter what value we pass as owner 39696c27377SValentina Manea * (struct dev_state) as long as it is unique. 39796c27377SValentina Manea */ 39896c27377SValentina Manea rc = usb_hub_claim_port(udev->parent, udev->portnum, 39996c27377SValentina Manea (struct usb_dev_state *) udev); 40096c27377SValentina Manea if (rc) { 40196c27377SValentina Manea dev_dbg(&udev->dev, "unable to claim port\n"); 40296c27377SValentina Manea return rc; 40396c27377SValentina Manea } 40496c27377SValentina Manea 40596c27377SValentina Manea err = stub_add_files(&udev->dev); 40696c27377SValentina Manea if (err) { 40796c27377SValentina Manea dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid); 40896c27377SValentina Manea dev_set_drvdata(&udev->dev, NULL); 40996c27377SValentina Manea usb_put_dev(udev); 41096c27377SValentina Manea kthread_stop_put(sdev->ud.eh); 41196c27377SValentina Manea 41296c27377SValentina Manea busid_priv->sdev = NULL; 41396c27377SValentina Manea stub_device_free(sdev); 41496c27377SValentina Manea return err; 41596c27377SValentina Manea } 41696c27377SValentina Manea busid_priv->status = STUB_BUSID_ALLOC; 41796c27377SValentina Manea 41896c27377SValentina Manea return 0; 41996c27377SValentina Manea } 42096c27377SValentina Manea 42196c27377SValentina Manea static void shutdown_busid(struct bus_id_priv *busid_priv) 42296c27377SValentina Manea { 42396c27377SValentina Manea if (busid_priv->sdev && !busid_priv->shutdown_busid) { 42496c27377SValentina Manea busid_priv->shutdown_busid = 1; 42596c27377SValentina Manea usbip_event_add(&busid_priv->sdev->ud, SDEV_EVENT_REMOVED); 42696c27377SValentina Manea 42796c27377SValentina Manea /* wait for the stop of the event handler */ 42896c27377SValentina Manea usbip_stop_eh(&busid_priv->sdev->ud); 42996c27377SValentina Manea } 43096c27377SValentina Manea } 43196c27377SValentina Manea 43296c27377SValentina Manea /* 43396c27377SValentina Manea * called in usb_disconnect() or usb_deregister() 43496c27377SValentina Manea * but only if actconfig(active configuration) exists 43596c27377SValentina Manea */ 43696c27377SValentina Manea static void stub_disconnect(struct usb_device *udev) 43796c27377SValentina Manea { 43896c27377SValentina Manea struct stub_device *sdev; 43996c27377SValentina Manea const char *udev_busid = dev_name(&udev->dev); 44096c27377SValentina Manea struct bus_id_priv *busid_priv; 44196c27377SValentina Manea int rc; 44296c27377SValentina Manea 44396c27377SValentina Manea dev_dbg(&udev->dev, "Enter\n"); 44496c27377SValentina Manea 44596c27377SValentina Manea busid_priv = get_busid_priv(udev_busid); 44696c27377SValentina Manea if (!busid_priv) { 44796c27377SValentina Manea BUG(); 44896c27377SValentina Manea return; 44996c27377SValentina Manea } 45096c27377SValentina Manea 45196c27377SValentina Manea sdev = dev_get_drvdata(&udev->dev); 45296c27377SValentina Manea 45396c27377SValentina Manea /* get stub_device */ 45496c27377SValentina Manea if (!sdev) { 45596c27377SValentina Manea dev_err(&udev->dev, "could not get device"); 45696c27377SValentina Manea return; 45796c27377SValentina Manea } 45896c27377SValentina Manea 45996c27377SValentina Manea dev_set_drvdata(&udev->dev, NULL); 46096c27377SValentina Manea 46196c27377SValentina Manea /* 46296c27377SValentina Manea * NOTE: rx/tx threads are invoked for each usb_device. 46396c27377SValentina Manea */ 46496c27377SValentina Manea stub_remove_files(&udev->dev); 46596c27377SValentina Manea 46696c27377SValentina Manea /* release port */ 46796c27377SValentina Manea rc = usb_hub_release_port(udev->parent, udev->portnum, 46896c27377SValentina Manea (struct usb_dev_state *) udev); 46996c27377SValentina Manea if (rc) { 47096c27377SValentina Manea dev_dbg(&udev->dev, "unable to release port\n"); 47196c27377SValentina Manea return; 47296c27377SValentina Manea } 47396c27377SValentina Manea 47496c27377SValentina Manea /* If usb reset is called from event handler */ 47596c27377SValentina Manea if (busid_priv->sdev->ud.eh == current) 47696c27377SValentina Manea return; 47796c27377SValentina Manea 47896c27377SValentina Manea /* shutdown the current connection */ 47996c27377SValentina Manea shutdown_busid(busid_priv); 48096c27377SValentina Manea 48196c27377SValentina Manea usb_put_dev(sdev->udev); 48296c27377SValentina Manea 48396c27377SValentina Manea /* free sdev */ 48496c27377SValentina Manea busid_priv->sdev = NULL; 48596c27377SValentina Manea stub_device_free(sdev); 48696c27377SValentina Manea 48796c27377SValentina Manea if (busid_priv->status == STUB_BUSID_ALLOC) { 48896c27377SValentina Manea busid_priv->status = STUB_BUSID_ADDED; 48996c27377SValentina Manea } else { 49096c27377SValentina Manea busid_priv->status = STUB_BUSID_OTHER; 49196c27377SValentina Manea del_match_busid((char *)udev_busid); 49296c27377SValentina Manea } 49396c27377SValentina Manea } 49496c27377SValentina Manea 49596c27377SValentina Manea #ifdef CONFIG_PM 49696c27377SValentina Manea 49796c27377SValentina Manea /* These functions need usb_port_suspend and usb_port_resume, 49896c27377SValentina Manea * which reside in drivers/usb/core/usb.h. Skip for now. */ 49996c27377SValentina Manea 50096c27377SValentina Manea static int stub_suspend(struct usb_device *udev, pm_message_t message) 50196c27377SValentina Manea { 50296c27377SValentina Manea dev_dbg(&udev->dev, "stub_suspend\n"); 50396c27377SValentina Manea 50496c27377SValentina Manea return 0; 50596c27377SValentina Manea } 50696c27377SValentina Manea 50796c27377SValentina Manea static int stub_resume(struct usb_device *udev, pm_message_t message) 50896c27377SValentina Manea { 50996c27377SValentina Manea dev_dbg(&udev->dev, "stub_resume\n"); 51096c27377SValentina Manea 51196c27377SValentina Manea return 0; 51296c27377SValentina Manea } 51396c27377SValentina Manea 51496c27377SValentina Manea #endif /* CONFIG_PM */ 51596c27377SValentina Manea 51696c27377SValentina Manea struct usb_device_driver stub_driver = { 51796c27377SValentina Manea .name = "usbip-host", 51896c27377SValentina Manea .probe = stub_probe, 51996c27377SValentina Manea .disconnect = stub_disconnect, 52096c27377SValentina Manea #ifdef CONFIG_PM 52196c27377SValentina Manea .suspend = stub_suspend, 52296c27377SValentina Manea .resume = stub_resume, 52396c27377SValentina Manea #endif 52496c27377SValentina Manea .supports_autosuspend = 0, 52596c27377SValentina Manea }; 526