source "drivers/staging/slicoss/Kconfig"
-source "drivers/staging/usbip/Kconfig"
-
source "drivers/staging/wlan-ng/Kconfig"
source "drivers/staging/comedi/Kconfig"
obj-y += media/
obj-$(CONFIG_ET131X) += et131x/
obj-$(CONFIG_SLICOSS) += slicoss/
-obj-$(CONFIG_USBIP_CORE) += usbip/
obj-$(CONFIG_PRISM2_USB) += wlan-ng/
obj-$(CONFIG_COMEDI) += comedi/
obj-$(CONFIG_FB_OLPC_DCON) += olpc_dcon/
+++ /dev/null
-config USBIP_CORE
- tristate "USB/IP support"
- depends on USB && NET
- ---help---
- This enables pushing USB packets over IP to allow remote
- machines direct access to USB devices. It provides the
- USB/IP core that is required by both drivers.
-
- For more details, and to get the userspace utility
- programs, please see <http://usbip.sourceforge.net/>.
-
- To compile this as a module, choose M here: the module will
- be called usbip-core.
-
- If unsure, say N.
-
-config USBIP_VHCI_HCD
- tristate "VHCI hcd"
- depends on USBIP_CORE
- ---help---
- This enables the USB/IP virtual host controller driver,
- which is run on the remote machine.
-
- To compile this driver as a module, choose M here: the
- module will be called vhci-hcd.
-
-config USBIP_HOST
- tristate "Host driver"
- depends on USBIP_CORE
- ---help---
- This enables the USB/IP host driver, which is run on the
- machine that is sharing the USB devices.
-
- To compile this driver as a module, choose M here: the
- module will be called usbip-host.
-
-config USBIP_DEBUG
- bool "Debug messages for USB/IP"
- depends on USBIP_CORE
- ---help---
- This enables the debug messages from the USB/IP drivers.
+++ /dev/null
-ccflags-$(CONFIG_USBIP_DEBUG) := -DDEBUG
-
-obj-$(CONFIG_USBIP_CORE) += usbip-core.o
-usbip-core-y := usbip_common.o usbip_event.o
-
-obj-$(CONFIG_USBIP_VHCI_HCD) += vhci-hcd.o
-vhci-hcd-y := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o
-
-obj-$(CONFIG_USBIP_HOST) += usbip-host.o
-usbip-host-y := stub_dev.o stub_main.o stub_rx.o stub_tx.o
+++ /dev/null
-TODO:
- - more discussion about the protocol
- - testing
- - review of the userspace interface
- - document the protocol
-
-Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#ifndef __USBIP_STUB_H
-#define __USBIP_STUB_H
-
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/usb.h>
-#include <linux/wait.h>
-
-#define STUB_BUSID_OTHER 0
-#define STUB_BUSID_REMOV 1
-#define STUB_BUSID_ADDED 2
-#define STUB_BUSID_ALLOC 3
-
-struct stub_device {
- struct usb_interface *interface;
- struct usb_device *udev;
-
- struct usbip_device ud;
- __u32 devid;
-
- /*
- * stub_priv preserves private data of each urb.
- * It is allocated as stub_priv_cache and assigned to urb->context.
- *
- * stub_priv is always linked to any one of 3 lists;
- * priv_init: linked to this until the comletion of a urb.
- * priv_tx : linked to this after the completion of a urb.
- * priv_free: linked to this after the sending of the result.
- *
- * Any of these list operations should be locked by priv_lock.
- */
- spinlock_t priv_lock;
- struct list_head priv_init;
- struct list_head priv_tx;
- struct list_head priv_free;
-
- /* see comments for unlinking in stub_rx.c */
- struct list_head unlink_tx;
- struct list_head unlink_free;
-
- wait_queue_head_t tx_waitq;
-};
-
-/* private data into urb->priv */
-struct stub_priv {
- unsigned long seqnum;
- struct list_head list;
- struct stub_device *sdev;
- struct urb *urb;
-
- int unlinking;
-};
-
-struct stub_unlink {
- unsigned long seqnum;
- struct list_head list;
- __u32 status;
-};
-
-/* same as SYSFS_BUS_ID_SIZE */
-#define BUSID_SIZE 32
-
-struct bus_id_priv {
- char name[BUSID_SIZE];
- char status;
- int interf_count;
- struct stub_device *sdev;
- struct usb_device *udev;
- char shutdown_busid;
-};
-
-/* stub_priv is allocated from stub_priv_cache */
-extern struct kmem_cache *stub_priv_cache;
-
-/* stub_dev.c */
-extern struct usb_device_driver stub_driver;
-
-/* stub_main.c */
-struct bus_id_priv *get_busid_priv(const char *busid);
-int del_match_busid(char *busid);
-void stub_device_cleanup_urbs(struct stub_device *sdev);
-
-/* stub_rx.c */
-int stub_rx_loop(void *data);
-
-/* stub_tx.c */
-void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
- __u32 status);
-void stub_complete(struct urb *urb);
-int stub_tx_loop(void *data);
-
-#endif /* __USBIP_STUB_H */
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/device.h>
-#include <linux/file.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-
-#include "usbip_common.h"
-#include "stub.h"
-
-/*
- * Define device IDs here if you want to explicitly limit exportable devices.
- * In most cases, wildcard matching will be okay because driver binding can be
- * changed dynamically by a userland program.
- */
-static struct usb_device_id stub_table[] = {
-#if 0
- /* just an example */
- { USB_DEVICE(0x05ac, 0x0301) }, /* Mac 1 button mouse */
- { USB_DEVICE(0x0430, 0x0009) }, /* Plat Home Keyboard */
- { USB_DEVICE(0x059b, 0x0001) }, /* Iomega USB Zip 100 */
- { USB_DEVICE(0x04b3, 0x4427) }, /* IBM USB CD-ROM */
- { USB_DEVICE(0x05a9, 0xa511) }, /* LifeView USB cam */
- { USB_DEVICE(0x55aa, 0x0201) }, /* Imation card reader */
- { USB_DEVICE(0x046d, 0x0870) }, /* Qcam Express(QV-30) */
- { USB_DEVICE(0x04bb, 0x0101) }, /* IO-DATA HD 120GB */
- { USB_DEVICE(0x04bb, 0x0904) }, /* IO-DATA USB-ET/TX */
- { USB_DEVICE(0x04bb, 0x0201) }, /* IO-DATA USB-ET/TX */
- { USB_DEVICE(0x08bb, 0x2702) }, /* ONKYO USB Speaker */
- { USB_DEVICE(0x046d, 0x08b2) }, /* Logicool Qcam 4000 Pro */
-#endif
- /* magic for wild card */
- { .driver_info = 1 },
- { 0, } /* Terminating entry */
-};
-MODULE_DEVICE_TABLE(usb, stub_table);
-
-/*
- * usbip_status shows the status of usbip-host as long as this driver is bound
- * to the target device.
- */
-static ssize_t usbip_status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct stub_device *sdev = dev_get_drvdata(dev);
- int status;
-
- if (!sdev) {
- dev_err(dev, "sdev is null\n");
- return -ENODEV;
- }
-
- spin_lock_irq(&sdev->ud.lock);
- status = sdev->ud.status;
- spin_unlock_irq(&sdev->ud.lock);
-
- return snprintf(buf, PAGE_SIZE, "%d\n", status);
-}
-static DEVICE_ATTR_RO(usbip_status);
-
-/*
- * usbip_sockfd gets a socket descriptor of an established TCP connection that
- * is used to transfer usbip requests by kernel threads. -1 is a magic number
- * by which usbip connection is finished.
- */
-static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct stub_device *sdev = dev_get_drvdata(dev);
- int sockfd = 0;
- struct socket *socket;
- int rv;
-
- if (!sdev) {
- dev_err(dev, "sdev is null\n");
- return -ENODEV;
- }
-
- rv = sscanf(buf, "%d", &sockfd);
- if (rv != 1)
- return -EINVAL;
-
- if (sockfd != -1) {
- int err;
-
- dev_info(dev, "stub up\n");
-
- spin_lock_irq(&sdev->ud.lock);
-
- if (sdev->ud.status != SDEV_ST_AVAILABLE) {
- dev_err(dev, "not ready\n");
- goto err;
- }
-
- socket = sockfd_lookup(sockfd, &err);
- if (!socket)
- goto err;
-
- sdev->ud.tcp_socket = socket;
-
- spin_unlock_irq(&sdev->ud.lock);
-
- sdev->ud.tcp_rx = kthread_get_run(stub_rx_loop, &sdev->ud,
- "stub_rx");
- sdev->ud.tcp_tx = kthread_get_run(stub_tx_loop, &sdev->ud,
- "stub_tx");
-
- spin_lock_irq(&sdev->ud.lock);
- sdev->ud.status = SDEV_ST_USED;
- spin_unlock_irq(&sdev->ud.lock);
-
- } else {
- dev_info(dev, "stub down\n");
-
- spin_lock_irq(&sdev->ud.lock);
- if (sdev->ud.status != SDEV_ST_USED)
- goto err;
-
- spin_unlock_irq(&sdev->ud.lock);
-
- usbip_event_add(&sdev->ud, SDEV_EVENT_DOWN);
- }
-
- return count;
-
-err:
- spin_unlock_irq(&sdev->ud.lock);
- return -EINVAL;
-}
-static DEVICE_ATTR(usbip_sockfd, S_IWUSR, NULL, store_sockfd);
-
-static int stub_add_files(struct device *dev)
-{
- int err = 0;
-
- err = device_create_file(dev, &dev_attr_usbip_status);
- if (err)
- goto err_status;
-
- err = device_create_file(dev, &dev_attr_usbip_sockfd);
- if (err)
- goto err_sockfd;
-
- err = device_create_file(dev, &dev_attr_usbip_debug);
- if (err)
- goto err_debug;
-
- return 0;
-
-err_debug:
- device_remove_file(dev, &dev_attr_usbip_sockfd);
-err_sockfd:
- device_remove_file(dev, &dev_attr_usbip_status);
-err_status:
- return err;
-}
-
-static void stub_remove_files(struct device *dev)
-{
- device_remove_file(dev, &dev_attr_usbip_status);
- device_remove_file(dev, &dev_attr_usbip_sockfd);
- device_remove_file(dev, &dev_attr_usbip_debug);
-}
-
-static void stub_shutdown_connection(struct usbip_device *ud)
-{
- struct stub_device *sdev = container_of(ud, struct stub_device, ud);
-
- /*
- * When removing an exported device, kernel panic sometimes occurred
- * and then EIP was sk_wait_data of stub_rx thread. Is this because
- * sk_wait_data returned though stub_rx thread was already finished by
- * step 1?
- */
- if (ud->tcp_socket) {
- dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n",
- ud->tcp_socket);
- kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
- }
-
- /* 1. stop threads */
- if (ud->tcp_rx) {
- kthread_stop_put(ud->tcp_rx);
- ud->tcp_rx = NULL;
- }
- if (ud->tcp_tx) {
- kthread_stop_put(ud->tcp_tx);
- ud->tcp_tx = NULL;
- }
-
- /*
- * 2. close the socket
- *
- * tcp_socket is freed after threads are killed so that usbip_xmit does
- * not touch NULL socket.
- */
- if (ud->tcp_socket) {
- sockfd_put(ud->tcp_socket);
- ud->tcp_socket = NULL;
- }
-
- /* 3. free used data */
- stub_device_cleanup_urbs(sdev);
-
- /* 4. free stub_unlink */
- {
- unsigned long flags;
- struct stub_unlink *unlink, *tmp;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
- list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
- list_del(&unlink->list);
- kfree(unlink);
- }
- list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free,
- list) {
- list_del(&unlink->list);
- kfree(unlink);
- }
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
- }
-}
-
-static void stub_device_reset(struct usbip_device *ud)
-{
- struct stub_device *sdev = container_of(ud, struct stub_device, ud);
- struct usb_device *udev = sdev->udev;
- int ret;
-
- dev_dbg(&udev->dev, "device reset");
-
- ret = usb_lock_device_for_reset(udev, sdev->interface);
- if (ret < 0) {
- dev_err(&udev->dev, "lock for reset\n");
- spin_lock_irq(&ud->lock);
- ud->status = SDEV_ST_ERROR;
- spin_unlock_irq(&ud->lock);
- return;
- }
-
- /* try to reset the device */
- ret = usb_reset_device(udev);
- usb_unlock_device(udev);
-
- spin_lock_irq(&ud->lock);
- if (ret) {
- dev_err(&udev->dev, "device reset\n");
- ud->status = SDEV_ST_ERROR;
- } else {
- dev_info(&udev->dev, "device reset\n");
- ud->status = SDEV_ST_AVAILABLE;
- }
- spin_unlock_irq(&ud->lock);
-}
-
-static void stub_device_unusable(struct usbip_device *ud)
-{
- spin_lock_irq(&ud->lock);
- ud->status = SDEV_ST_ERROR;
- spin_unlock_irq(&ud->lock);
-}
-
-/**
- * stub_device_alloc - allocate a new stub_device struct
- * @interface: usb_interface of a new device
- *
- * Allocates and initializes a new stub_device struct.
- */
-static struct stub_device *stub_device_alloc(struct usb_device *udev)
-{
- struct stub_device *sdev;
- int busnum = udev->bus->busnum;
- int devnum = udev->devnum;
-
- dev_dbg(&udev->dev, "allocating stub device");
-
- /* yes, it's a new device */
- sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL);
- if (!sdev)
- return NULL;
-
- sdev->udev = usb_get_dev(udev);
-
- /*
- * devid is defined with devnum when this driver is first allocated.
- * devnum may change later if a device is reset. However, devid never
- * changes during a usbip connection.
- */
- sdev->devid = (busnum << 16) | devnum;
- sdev->ud.side = USBIP_STUB;
- sdev->ud.status = SDEV_ST_AVAILABLE;
- spin_lock_init(&sdev->ud.lock);
- sdev->ud.tcp_socket = NULL;
-
- INIT_LIST_HEAD(&sdev->priv_init);
- INIT_LIST_HEAD(&sdev->priv_tx);
- INIT_LIST_HEAD(&sdev->priv_free);
- INIT_LIST_HEAD(&sdev->unlink_free);
- INIT_LIST_HEAD(&sdev->unlink_tx);
- spin_lock_init(&sdev->priv_lock);
-
- init_waitqueue_head(&sdev->tx_waitq);
-
- sdev->ud.eh_ops.shutdown = stub_shutdown_connection;
- sdev->ud.eh_ops.reset = stub_device_reset;
- sdev->ud.eh_ops.unusable = stub_device_unusable;
-
- usbip_start_eh(&sdev->ud);
-
- dev_dbg(&udev->dev, "register new device\n");
-
- return sdev;
-}
-
-static void stub_device_free(struct stub_device *sdev)
-{
- kfree(sdev);
-}
-
-static int stub_probe(struct usb_device *udev)
-{
- struct stub_device *sdev = NULL;
- const char *udev_busid = dev_name(&udev->dev);
- int err = 0;
- struct bus_id_priv *busid_priv;
- int rc;
-
- dev_dbg(&udev->dev, "Enter\n");
-
- /* check we should claim or not by busid_table */
- busid_priv = get_busid_priv(udev_busid);
- if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) ||
- (busid_priv->status == STUB_BUSID_OTHER)) {
- dev_info(&udev->dev,
- "%s is not in match_busid table... skip!\n",
- udev_busid);
-
- /*
- * Return value should be ENODEV or ENOXIO to continue trying
- * other matched drivers by the driver core.
- * See driver_probe_device() in driver/base/dd.c
- */
- return -ENODEV;
- }
-
- if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) {
- dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n",
- udev_busid);
- return -ENODEV;
- }
-
- if (!strcmp(udev->bus->bus_name, "vhci_hcd")) {
- dev_dbg(&udev->dev,
- "%s is attached on vhci_hcd... skip!\n",
- udev_busid);
-
- return -ENODEV;
- }
-
- /* ok, this is my device */
- sdev = stub_device_alloc(udev);
- if (!sdev)
- return -ENOMEM;
-
- dev_info(&udev->dev,
- "usbip-host: register new device (bus %u dev %u)\n",
- udev->bus->busnum, udev->devnum);
-
- busid_priv->shutdown_busid = 0;
-
- /* set private data to usb_device */
- dev_set_drvdata(&udev->dev, sdev);
- busid_priv->sdev = sdev;
- busid_priv->udev = udev;
-
- /*
- * Claim this hub port.
- * It doesn't matter what value we pass as owner
- * (struct dev_state) as long as it is unique.
- */
- rc = usb_hub_claim_port(udev->parent, udev->portnum,
- (struct usb_dev_state *) udev);
- if (rc) {
- dev_dbg(&udev->dev, "unable to claim port\n");
- return rc;
- }
-
- err = stub_add_files(&udev->dev);
- if (err) {
- dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
- dev_set_drvdata(&udev->dev, NULL);
- usb_put_dev(udev);
- kthread_stop_put(sdev->ud.eh);
-
- busid_priv->sdev = NULL;
- stub_device_free(sdev);
- return err;
- }
- busid_priv->status = STUB_BUSID_ALLOC;
-
- return 0;
-}
-
-static void shutdown_busid(struct bus_id_priv *busid_priv)
-{
- if (busid_priv->sdev && !busid_priv->shutdown_busid) {
- busid_priv->shutdown_busid = 1;
- usbip_event_add(&busid_priv->sdev->ud, SDEV_EVENT_REMOVED);
-
- /* wait for the stop of the event handler */
- usbip_stop_eh(&busid_priv->sdev->ud);
- }
-}
-
-/*
- * called in usb_disconnect() or usb_deregister()
- * but only if actconfig(active configuration) exists
- */
-static void stub_disconnect(struct usb_device *udev)
-{
- struct stub_device *sdev;
- const char *udev_busid = dev_name(&udev->dev);
- struct bus_id_priv *busid_priv;
- int rc;
-
- dev_dbg(&udev->dev, "Enter\n");
-
- busid_priv = get_busid_priv(udev_busid);
- if (!busid_priv) {
- BUG();
- return;
- }
-
- sdev = dev_get_drvdata(&udev->dev);
-
- /* get stub_device */
- if (!sdev) {
- dev_err(&udev->dev, "could not get device");
- return;
- }
-
- dev_set_drvdata(&udev->dev, NULL);
-
- /*
- * NOTE: rx/tx threads are invoked for each usb_device.
- */
- stub_remove_files(&udev->dev);
-
- /* release port */
- rc = usb_hub_release_port(udev->parent, udev->portnum,
- (struct usb_dev_state *) udev);
- if (rc) {
- dev_dbg(&udev->dev, "unable to release port\n");
- return;
- }
-
- /* If usb reset is called from event handler */
- if (busid_priv->sdev->ud.eh == current)
- return;
-
- /* shutdown the current connection */
- shutdown_busid(busid_priv);
-
- usb_put_dev(sdev->udev);
-
- /* free sdev */
- busid_priv->sdev = NULL;
- stub_device_free(sdev);
-
- if (busid_priv->status == STUB_BUSID_ALLOC) {
- busid_priv->status = STUB_BUSID_ADDED;
- } else {
- busid_priv->status = STUB_BUSID_OTHER;
- del_match_busid((char *)udev_busid);
- }
-}
-
-#ifdef CONFIG_PM
-
-/* These functions need usb_port_suspend and usb_port_resume,
- * which reside in drivers/usb/core/usb.h. Skip for now. */
-
-static int stub_suspend(struct usb_device *udev, pm_message_t message)
-{
- dev_dbg(&udev->dev, "stub_suspend\n");
-
- return 0;
-}
-
-static int stub_resume(struct usb_device *udev, pm_message_t message)
-{
- dev_dbg(&udev->dev, "stub_resume\n");
-
- return 0;
-}
-
-#endif /* CONFIG_PM */
-
-struct usb_device_driver stub_driver = {
- .name = "usbip-host",
- .probe = stub_probe,
- .disconnect = stub_disconnect,
-#ifdef CONFIG_PM
- .suspend = stub_suspend,
- .resume = stub_resume,
-#endif
- .supports_autosuspend = 0,
-};
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/string.h>
-#include <linux/module.h>
-#include <linux/device.h>
-
-#include "usbip_common.h"
-#include "stub.h"
-
-#define DRIVER_AUTHOR "Takahiro Hirofuchi"
-#define DRIVER_DESC "USB/IP Host Driver"
-
-struct kmem_cache *stub_priv_cache;
-/*
- * busid_tables defines matching busids that usbip can grab. A user can change
- * dynamically what device is locally used and what device is exported to a
- * remote host.
- */
-#define MAX_BUSID 16
-static struct bus_id_priv busid_table[MAX_BUSID];
-static spinlock_t busid_table_lock;
-
-static void init_busid_table(void)
-{
- /*
- * This also sets the bus_table[i].status to
- * STUB_BUSID_OTHER, which is 0.
- */
- memset(busid_table, 0, sizeof(busid_table));
-
- spin_lock_init(&busid_table_lock);
-}
-
-/*
- * Find the index of the busid by name.
- * Must be called with busid_table_lock held.
- */
-static int get_busid_idx(const char *busid)
-{
- int i;
- int idx = -1;
-
- for (i = 0; i < MAX_BUSID; i++)
- if (busid_table[i].name[0])
- if (!strncmp(busid_table[i].name, busid, BUSID_SIZE)) {
- idx = i;
- break;
- }
- return idx;
-}
-
-struct bus_id_priv *get_busid_priv(const char *busid)
-{
- int idx;
- struct bus_id_priv *bid = NULL;
-
- spin_lock(&busid_table_lock);
- idx = get_busid_idx(busid);
- if (idx >= 0)
- bid = &(busid_table[idx]);
- spin_unlock(&busid_table_lock);
-
- return bid;
-}
-
-static int add_match_busid(char *busid)
-{
- int i;
- int ret = -1;
-
- spin_lock(&busid_table_lock);
- /* already registered? */
- if (get_busid_idx(busid) >= 0) {
- ret = 0;
- goto out;
- }
-
- for (i = 0; i < MAX_BUSID; i++)
- if (!busid_table[i].name[0]) {
- strlcpy(busid_table[i].name, busid, BUSID_SIZE);
- if ((busid_table[i].status != STUB_BUSID_ALLOC) &&
- (busid_table[i].status != STUB_BUSID_REMOV))
- busid_table[i].status = STUB_BUSID_ADDED;
- ret = 0;
- break;
- }
-
-out:
- spin_unlock(&busid_table_lock);
-
- return ret;
-}
-
-int del_match_busid(char *busid)
-{
- int idx;
- int ret = -1;
-
- spin_lock(&busid_table_lock);
- idx = get_busid_idx(busid);
- if (idx < 0)
- goto out;
-
- /* found */
- ret = 0;
-
- if (busid_table[idx].status == STUB_BUSID_OTHER)
- memset(busid_table[idx].name, 0, BUSID_SIZE);
-
- if ((busid_table[idx].status != STUB_BUSID_OTHER) &&
- (busid_table[idx].status != STUB_BUSID_ADDED))
- busid_table[idx].status = STUB_BUSID_REMOV;
-
-out:
- spin_unlock(&busid_table_lock);
-
- return ret;
-}
-
-static ssize_t show_match_busid(struct device_driver *drv, char *buf)
-{
- int i;
- char *out = buf;
-
- spin_lock(&busid_table_lock);
- for (i = 0; i < MAX_BUSID; i++)
- if (busid_table[i].name[0])
- out += sprintf(out, "%s ", busid_table[i].name);
- spin_unlock(&busid_table_lock);
- out += sprintf(out, "\n");
-
- return out - buf;
-}
-
-static ssize_t store_match_busid(struct device_driver *dev, const char *buf,
- size_t count)
-{
- int len;
- char busid[BUSID_SIZE];
-
- if (count < 5)
- return -EINVAL;
-
- /* busid needs to include \0 termination */
- len = strlcpy(busid, buf + 4, BUSID_SIZE);
- if (sizeof(busid) <= len)
- return -EINVAL;
-
- if (!strncmp(buf, "add ", 4)) {
- if (add_match_busid(busid) < 0)
- return -ENOMEM;
-
- pr_debug("add busid %s\n", busid);
- return count;
- }
-
- if (!strncmp(buf, "del ", 4)) {
- if (del_match_busid(busid) < 0)
- return -ENODEV;
-
- pr_debug("del busid %s\n", busid);
- return count;
- }
-
- return -EINVAL;
-}
-static DRIVER_ATTR(match_busid, S_IRUSR | S_IWUSR, show_match_busid,
- store_match_busid);
-
-static ssize_t rebind_store(struct device_driver *dev, const char *buf,
- size_t count)
-{
- int ret;
- int len;
- struct bus_id_priv *bid;
-
- /* buf length should be less that BUSID_SIZE */
- len = strnlen(buf, BUSID_SIZE);
-
- if (!(len < BUSID_SIZE))
- return -EINVAL;
-
- bid = get_busid_priv(buf);
- if (!bid)
- return -ENODEV;
-
- ret = device_attach(&bid->udev->dev);
- if (ret < 0) {
- dev_err(&bid->udev->dev, "rebind failed\n");
- return ret;
- }
-
- return count;
-}
-
-static DRIVER_ATTR_WO(rebind);
-
-static struct stub_priv *stub_priv_pop_from_listhead(struct list_head *listhead)
-{
- struct stub_priv *priv, *tmp;
-
- list_for_each_entry_safe(priv, tmp, listhead, list) {
- list_del(&priv->list);
- return priv;
- }
-
- return NULL;
-}
-
-static struct stub_priv *stub_priv_pop(struct stub_device *sdev)
-{
- unsigned long flags;
- struct stub_priv *priv;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- priv = stub_priv_pop_from_listhead(&sdev->priv_init);
- if (priv)
- goto done;
-
- priv = stub_priv_pop_from_listhead(&sdev->priv_tx);
- if (priv)
- goto done;
-
- priv = stub_priv_pop_from_listhead(&sdev->priv_free);
-
-done:
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return priv;
-}
-
-void stub_device_cleanup_urbs(struct stub_device *sdev)
-{
- struct stub_priv *priv;
- struct urb *urb;
-
- dev_dbg(&sdev->udev->dev, "free sdev %p\n", sdev);
-
- while ((priv = stub_priv_pop(sdev))) {
- urb = priv->urb;
- dev_dbg(&sdev->udev->dev, "free urb %p\n", urb);
- usb_kill_urb(urb);
-
- kmem_cache_free(stub_priv_cache, priv);
-
- kfree(urb->transfer_buffer);
- kfree(urb->setup_packet);
- usb_free_urb(urb);
- }
-}
-
-static int __init usbip_host_init(void)
-{
- int ret;
-
- init_busid_table();
-
- stub_priv_cache = KMEM_CACHE(stub_priv, SLAB_HWCACHE_ALIGN);
- if (!stub_priv_cache) {
- pr_err("kmem_cache_create failed\n");
- return -ENOMEM;
- }
-
- ret = usb_register_device_driver(&stub_driver, THIS_MODULE);
- if (ret) {
- pr_err("usb_register failed %d\n", ret);
- goto err_usb_register;
- }
-
- ret = driver_create_file(&stub_driver.drvwrap.driver,
- &driver_attr_match_busid);
- if (ret) {
- pr_err("driver_create_file failed\n");
- goto err_create_file;
- }
-
- ret = driver_create_file(&stub_driver.drvwrap.driver,
- &driver_attr_rebind);
- if (ret) {
- pr_err("driver_create_file failed\n");
- goto err_create_file;
- }
-
- pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
- return ret;
-
-err_create_file:
- usb_deregister_device_driver(&stub_driver);
-err_usb_register:
- kmem_cache_destroy(stub_priv_cache);
- return ret;
-}
-
-static void __exit usbip_host_exit(void)
-{
- driver_remove_file(&stub_driver.drvwrap.driver,
- &driver_attr_match_busid);
-
- driver_remove_file(&stub_driver.drvwrap.driver,
- &driver_attr_rebind);
-
- /*
- * deregister() calls stub_disconnect() for all devices. Device
- * specific data is cleared in stub_disconnect().
- */
- usb_deregister_device_driver(&stub_driver);
-
- kmem_cache_destroy(stub_priv_cache);
-}
-
-module_init(usbip_host_init);
-module_exit(usbip_host_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_VERSION(USBIP_VERSION);
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <asm/byteorder.h>
-#include <linux/kthread.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-
-#include "usbip_common.h"
-#include "stub.h"
-
-static int is_clear_halt_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
-
- return (req->bRequest == USB_REQ_CLEAR_FEATURE) &&
- (req->bRequestType == USB_RECIP_ENDPOINT) &&
- (req->wValue == USB_ENDPOINT_HALT);
-}
-
-static int is_set_interface_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
-
- return (req->bRequest == USB_REQ_SET_INTERFACE) &&
- (req->bRequestType == USB_RECIP_INTERFACE);
-}
-
-static int is_set_configuration_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
-
- return (req->bRequest == USB_REQ_SET_CONFIGURATION) &&
- (req->bRequestType == USB_RECIP_DEVICE);
-}
-
-static int is_reset_device_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
- __u16 value;
- __u16 index;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
- value = le16_to_cpu(req->wValue);
- index = le16_to_cpu(req->wIndex);
-
- if ((req->bRequest == USB_REQ_SET_FEATURE) &&
- (req->bRequestType == USB_RT_PORT) &&
- (value == USB_PORT_FEAT_RESET)) {
- usbip_dbg_stub_rx("reset_device_cmd, port %u\n", index);
- return 1;
- } else
- return 0;
-}
-
-static int tweak_clear_halt_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
- int target_endp;
- int target_dir;
- int target_pipe;
- int ret;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
-
- /*
- * The stalled endpoint is specified in the wIndex value. The endpoint
- * of the urb is the target of this clear_halt request (i.e., control
- * endpoint).
- */
- target_endp = le16_to_cpu(req->wIndex) & 0x000f;
-
- /* the stalled endpoint direction is IN or OUT?. USB_DIR_IN is 0x80. */
- target_dir = le16_to_cpu(req->wIndex) & 0x0080;
-
- if (target_dir)
- target_pipe = usb_rcvctrlpipe(urb->dev, target_endp);
- else
- target_pipe = usb_sndctrlpipe(urb->dev, target_endp);
-
- ret = usb_clear_halt(urb->dev, target_pipe);
- if (ret < 0)
- dev_err(&urb->dev->dev,
- "usb_clear_halt error: devnum %d endp %d ret %d\n",
- urb->dev->devnum, target_endp, ret);
- else
- dev_info(&urb->dev->dev,
- "usb_clear_halt done: devnum %d endp %d\n",
- urb->dev->devnum, target_endp);
-
- return ret;
-}
-
-static int tweak_set_interface_cmd(struct urb *urb)
-{
- struct usb_ctrlrequest *req;
- __u16 alternate;
- __u16 interface;
- int ret;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
- alternate = le16_to_cpu(req->wValue);
- interface = le16_to_cpu(req->wIndex);
-
- usbip_dbg_stub_rx("set_interface: inf %u alt %u\n",
- interface, alternate);
-
- ret = usb_set_interface(urb->dev, interface, alternate);
- if (ret < 0)
- dev_err(&urb->dev->dev,
- "usb_set_interface error: inf %u alt %u ret %d\n",
- interface, alternate, ret);
- else
- dev_info(&urb->dev->dev,
- "usb_set_interface done: inf %u alt %u\n",
- interface, alternate);
-
- return ret;
-}
-
-static int tweak_set_configuration_cmd(struct urb *urb)
-{
- struct stub_priv *priv = (struct stub_priv *) urb->context;
- struct stub_device *sdev = priv->sdev;
- struct usb_ctrlrequest *req;
- __u16 config;
- int err;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
- config = le16_to_cpu(req->wValue);
-
- err = usb_set_configuration(sdev->udev, config);
- if (err && err != -ENODEV)
- dev_err(&sdev->udev->dev, "can't set config #%d, error %d\n",
- config, err);
- return 0;
-}
-
-static int tweak_reset_device_cmd(struct urb *urb)
-{
- struct stub_priv *priv = (struct stub_priv *) urb->context;
- struct stub_device *sdev = priv->sdev;
-
- dev_info(&urb->dev->dev, "usb_queue_reset_device\n");
-
- /*
- * With the implementation of pre_reset and post_reset the driver no
- * longer unbinds. This allows the use of synchronous reset.
- */
-
- if (usb_lock_device_for_reset(sdev->udev, sdev->interface) < 0) {
- dev_err(&urb->dev->dev, "could not obtain lock to reset device\n");
- return 0;
- }
- usb_reset_device(sdev->udev);
- usb_unlock_device(sdev->udev);
-
- return 0;
-}
-
-/*
- * clear_halt, set_interface, and set_configuration require special tricks.
- */
-static void tweak_special_requests(struct urb *urb)
-{
- if (!urb || !urb->setup_packet)
- return;
-
- if (usb_pipetype(urb->pipe) != PIPE_CONTROL)
- return;
-
- if (is_clear_halt_cmd(urb))
- /* tweak clear_halt */
- tweak_clear_halt_cmd(urb);
-
- else if (is_set_interface_cmd(urb))
- /* tweak set_interface */
- tweak_set_interface_cmd(urb);
-
- else if (is_set_configuration_cmd(urb))
- /* tweak set_configuration */
- tweak_set_configuration_cmd(urb);
-
- else if (is_reset_device_cmd(urb))
- tweak_reset_device_cmd(urb);
- else
- usbip_dbg_stub_rx("no need to tweak\n");
-}
-
-/*
- * stub_recv_unlink() unlinks the URB by a call to usb_unlink_urb().
- * By unlinking the urb asynchronously, stub_rx can continuously
- * process coming urbs. Even if the urb is unlinked, its completion
- * handler will be called and stub_tx will send a return pdu.
- *
- * See also comments about unlinking strategy in vhci_hcd.c.
- */
-static int stub_recv_cmd_unlink(struct stub_device *sdev,
- struct usbip_header *pdu)
-{
- int ret;
- unsigned long flags;
- struct stub_priv *priv;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- list_for_each_entry(priv, &sdev->priv_init, list) {
- if (priv->seqnum != pdu->u.cmd_unlink.seqnum)
- continue;
-
- dev_info(&priv->urb->dev->dev, "unlink urb %p\n",
- priv->urb);
-
- /*
- * This matched urb is not completed yet (i.e., be in
- * flight in usb hcd hardware/driver). Now we are
- * cancelling it. The unlinking flag means that we are
- * now not going to return the normal result pdu of a
- * submission request, but going to return a result pdu
- * of the unlink request.
- */
- priv->unlinking = 1;
-
- /*
- * In the case that unlinking flag is on, prev->seqnum
- * is changed from the seqnum of the cancelling urb to
- * the seqnum of the unlink request. This will be used
- * to make the result pdu of the unlink request.
- */
- priv->seqnum = pdu->base.seqnum;
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- /*
- * usb_unlink_urb() is now out of spinlocking to avoid
- * spinlock recursion since stub_complete() is
- * sometimes called in this context but not in the
- * interrupt context. If stub_complete() is executed
- * before we call usb_unlink_urb(), usb_unlink_urb()
- * will return an error value. In this case, stub_tx
- * will return the result pdu of this unlink request
- * though submission is completed and actual unlinking
- * is not executed. OK?
- */
- /* In the above case, urb->status is not -ECONNRESET,
- * so a driver in a client host will know the failure
- * of the unlink request ?
- */
- ret = usb_unlink_urb(priv->urb);
- if (ret != -EINPROGRESS)
- dev_err(&priv->urb->dev->dev,
- "failed to unlink a urb %p, ret %d\n",
- priv->urb, ret);
-
- return 0;
- }
-
- usbip_dbg_stub_rx("seqnum %d is not pending\n",
- pdu->u.cmd_unlink.seqnum);
-
- /*
- * The urb of the unlink target is not found in priv_init queue. It was
- * already completed and its results is/was going to be sent by a
- * CMD_RET pdu. In this case, usb_unlink_urb() is not needed. We only
- * return the completeness of this unlink request to vhci_hcd.
- */
- stub_enqueue_ret_unlink(sdev, pdu->base.seqnum, 0);
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return 0;
-}
-
-static int valid_request(struct stub_device *sdev, struct usbip_header *pdu)
-{
- struct usbip_device *ud = &sdev->ud;
- int valid = 0;
-
- if (pdu->base.devid == sdev->devid) {
- spin_lock_irq(&ud->lock);
- if (ud->status == SDEV_ST_USED) {
- /* A request is valid. */
- valid = 1;
- }
- spin_unlock_irq(&ud->lock);
- }
-
- return valid;
-}
-
-static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
- struct usbip_header *pdu)
-{
- struct stub_priv *priv;
- struct usbip_device *ud = &sdev->ud;
- unsigned long flags;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- priv = kmem_cache_zalloc(stub_priv_cache, GFP_ATOMIC);
- if (!priv) {
- dev_err(&sdev->interface->dev, "alloc stub_priv\n");
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
- usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
- return NULL;
- }
-
- priv->seqnum = pdu->base.seqnum;
- priv->sdev = sdev;
-
- /*
- * After a stub_priv is linked to a list_head,
- * our error handler can free allocated data.
- */
- list_add_tail(&priv->list, &sdev->priv_init);
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return priv;
-}
-
-static int get_pipe(struct stub_device *sdev, int epnum, int dir)
-{
- struct usb_device *udev = sdev->udev;
- struct usb_host_endpoint *ep;
- struct usb_endpoint_descriptor *epd = NULL;
-
- if (dir == USBIP_DIR_IN)
- ep = udev->ep_in[epnum & 0x7f];
- else
- ep = udev->ep_out[epnum & 0x7f];
- if (!ep) {
- dev_err(&sdev->interface->dev, "no such endpoint?, %d\n",
- epnum);
- BUG();
- }
-
- epd = &ep->desc;
- if (usb_endpoint_xfer_control(epd)) {
- if (dir == USBIP_DIR_OUT)
- return usb_sndctrlpipe(udev, epnum);
- else
- return usb_rcvctrlpipe(udev, epnum);
- }
-
- if (usb_endpoint_xfer_bulk(epd)) {
- if (dir == USBIP_DIR_OUT)
- return usb_sndbulkpipe(udev, epnum);
- else
- return usb_rcvbulkpipe(udev, epnum);
- }
-
- if (usb_endpoint_xfer_int(epd)) {
- if (dir == USBIP_DIR_OUT)
- return usb_sndintpipe(udev, epnum);
- else
- return usb_rcvintpipe(udev, epnum);
- }
-
- if (usb_endpoint_xfer_isoc(epd)) {
- if (dir == USBIP_DIR_OUT)
- return usb_sndisocpipe(udev, epnum);
- else
- return usb_rcvisocpipe(udev, epnum);
- }
-
- /* NOT REACHED */
- dev_err(&sdev->interface->dev, "get pipe, epnum %d\n", epnum);
- return 0;
-}
-
-static void masking_bogus_flags(struct urb *urb)
-{
- int xfertype;
- struct usb_device *dev;
- struct usb_host_endpoint *ep;
- int is_out;
- unsigned int allowed;
-
- if (!urb || urb->hcpriv || !urb->complete)
- return;
- dev = urb->dev;
- if ((!dev) || (dev->state < USB_STATE_UNAUTHENTICATED))
- return;
-
- ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
- [usb_pipeendpoint(urb->pipe)];
- if (!ep)
- return;
-
- xfertype = usb_endpoint_type(&ep->desc);
- if (xfertype == USB_ENDPOINT_XFER_CONTROL) {
- struct usb_ctrlrequest *setup =
- (struct usb_ctrlrequest *) urb->setup_packet;
-
- if (!setup)
- return;
- is_out = !(setup->bRequestType & USB_DIR_IN) ||
- !setup->wLength;
- } else {
- is_out = usb_endpoint_dir_out(&ep->desc);
- }
-
- /* enforce simple/standard policy */
- allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT |
- URB_DIR_MASK | URB_FREE_BUFFER);
- switch (xfertype) {
- case USB_ENDPOINT_XFER_BULK:
- if (is_out)
- allowed |= URB_ZERO_PACKET;
- /* FALLTHROUGH */
- case USB_ENDPOINT_XFER_CONTROL:
- allowed |= URB_NO_FSBR; /* only affects UHCI */
- /* FALLTHROUGH */
- default: /* all non-iso endpoints */
- if (!is_out)
- allowed |= URB_SHORT_NOT_OK;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- allowed |= URB_ISO_ASAP;
- break;
- }
- urb->transfer_flags &= allowed;
-}
-
-static void stub_recv_cmd_submit(struct stub_device *sdev,
- struct usbip_header *pdu)
-{
- int ret;
- struct stub_priv *priv;
- struct usbip_device *ud = &sdev->ud;
- struct usb_device *udev = sdev->udev;
- int pipe = get_pipe(sdev, pdu->base.ep, pdu->base.direction);
-
- priv = stub_priv_alloc(sdev, pdu);
- if (!priv)
- return;
-
- /* setup a urb */
- if (usb_pipeisoc(pipe))
- priv->urb = usb_alloc_urb(pdu->u.cmd_submit.number_of_packets,
- GFP_KERNEL);
- else
- priv->urb = usb_alloc_urb(0, GFP_KERNEL);
-
- if (!priv->urb) {
- dev_err(&sdev->interface->dev, "malloc urb\n");
- usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
- return;
- }
-
- /* allocate urb transfer buffer, if needed */
- if (pdu->u.cmd_submit.transfer_buffer_length > 0) {
- priv->urb->transfer_buffer =
- kzalloc(pdu->u.cmd_submit.transfer_buffer_length,
- GFP_KERNEL);
- if (!priv->urb->transfer_buffer) {
- usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
- return;
- }
- }
-
- /* copy urb setup packet */
- priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
- GFP_KERNEL);
- if (!priv->urb->setup_packet) {
- dev_err(&sdev->interface->dev, "allocate setup_packet\n");
- usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
- return;
- }
-
- /* set other members from the base header of pdu */
- priv->urb->context = (void *) priv;
- priv->urb->dev = udev;
- priv->urb->pipe = pipe;
- priv->urb->complete = stub_complete;
-
- usbip_pack_pdu(pdu, priv->urb, USBIP_CMD_SUBMIT, 0);
-
-
- if (usbip_recv_xbuff(ud, priv->urb) < 0)
- return;
-
- if (usbip_recv_iso(ud, priv->urb) < 0)
- return;
-
- /* no need to submit an intercepted request, but harmless? */
- tweak_special_requests(priv->urb);
-
- masking_bogus_flags(priv->urb);
- /* urb is now ready to submit */
- ret = usb_submit_urb(priv->urb, GFP_KERNEL);
-
- if (ret == 0)
- usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
- pdu->base.seqnum);
- else {
- dev_err(&sdev->interface->dev, "submit_urb error, %d\n", ret);
- usbip_dump_header(pdu);
- usbip_dump_urb(priv->urb);
-
- /*
- * Pessimistic.
- * This connection will be discarded.
- */
- usbip_event_add(ud, SDEV_EVENT_ERROR_SUBMIT);
- }
-
- usbip_dbg_stub_rx("Leave\n");
-}
-
-/* recv a pdu */
-static void stub_rx_pdu(struct usbip_device *ud)
-{
- int ret;
- struct usbip_header pdu;
- struct stub_device *sdev = container_of(ud, struct stub_device, ud);
- struct device *dev = &sdev->udev->dev;
-
- usbip_dbg_stub_rx("Enter\n");
-
- memset(&pdu, 0, sizeof(pdu));
-
- /* receive a pdu header */
- ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
- if (ret != sizeof(pdu)) {
- dev_err(dev, "recv a header, %d\n", ret);
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- return;
- }
-
- usbip_header_correct_endian(&pdu, 0);
-
- if (usbip_dbg_flag_stub_rx)
- usbip_dump_header(&pdu);
-
- if (!valid_request(sdev, &pdu)) {
- dev_err(dev, "recv invalid request\n");
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- return;
- }
-
- switch (pdu.base.command) {
- case USBIP_CMD_UNLINK:
- stub_recv_cmd_unlink(sdev, &pdu);
- break;
-
- case USBIP_CMD_SUBMIT:
- stub_recv_cmd_submit(sdev, &pdu);
- break;
-
- default:
- /* NOTREACHED */
- dev_err(dev, "unknown pdu\n");
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- break;
- }
-}
-
-int stub_rx_loop(void *data)
-{
- struct usbip_device *ud = data;
-
- while (!kthread_should_stop()) {
- if (usbip_event_happened(ud))
- break;
-
- stub_rx_pdu(ud);
- }
-
- return 0;
-}
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/socket.h>
-
-#include "usbip_common.h"
-#include "stub.h"
-
-static void stub_free_priv_and_urb(struct stub_priv *priv)
-{
- struct urb *urb = priv->urb;
-
- kfree(urb->setup_packet);
- kfree(urb->transfer_buffer);
- list_del(&priv->list);
- kmem_cache_free(stub_priv_cache, priv);
- usb_free_urb(urb);
-}
-
-/* be in spin_lock_irqsave(&sdev->priv_lock, flags) */
-void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
- __u32 status)
-{
- struct stub_unlink *unlink;
-
- unlink = kzalloc(sizeof(struct stub_unlink), GFP_ATOMIC);
- if (!unlink) {
- usbip_event_add(&sdev->ud, VDEV_EVENT_ERROR_MALLOC);
- return;
- }
-
- unlink->seqnum = seqnum;
- unlink->status = status;
-
- list_add_tail(&unlink->list, &sdev->unlink_tx);
-}
-
-/**
- * stub_complete - completion handler of a usbip urb
- * @urb: pointer to the urb completed
- *
- * When a urb has completed, the USB core driver calls this function mostly in
- * the interrupt context. To return the result of a urb, the completed urb is
- * linked to the pending list of returning.
- *
- */
-void stub_complete(struct urb *urb)
-{
- struct stub_priv *priv = (struct stub_priv *) urb->context;
- struct stub_device *sdev = priv->sdev;
- unsigned long flags;
-
- usbip_dbg_stub_tx("complete! status %d\n", urb->status);
-
- switch (urb->status) {
- case 0:
- /* OK */
- break;
- case -ENOENT:
- dev_info(&urb->dev->dev,
- "stopped by a call to usb_kill_urb() because of cleaning up a virtual connection\n");
- return;
- case -ECONNRESET:
- dev_info(&urb->dev->dev,
- "unlinked by a call to usb_unlink_urb()\n");
- break;
- case -EPIPE:
- dev_info(&urb->dev->dev, "endpoint %d is stalled\n",
- usb_pipeendpoint(urb->pipe));
- break;
- case -ESHUTDOWN:
- dev_info(&urb->dev->dev, "device removed?\n");
- break;
- default:
- dev_info(&urb->dev->dev,
- "urb completion with non-zero status %d\n",
- urb->status);
- break;
- }
-
- /* link a urb to the queue of tx. */
- spin_lock_irqsave(&sdev->priv_lock, flags);
- if (priv->unlinking) {
- stub_enqueue_ret_unlink(sdev, priv->seqnum, urb->status);
- stub_free_priv_and_urb(priv);
- } else {
- list_move_tail(&priv->list, &sdev->priv_tx);
- }
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- /* wake up tx_thread */
- wake_up(&sdev->tx_waitq);
-}
-
-static inline void setup_base_pdu(struct usbip_header_basic *base,
- __u32 command, __u32 seqnum)
-{
- base->command = command;
- base->seqnum = seqnum;
- base->devid = 0;
- base->ep = 0;
- base->direction = 0;
-}
-
-static void setup_ret_submit_pdu(struct usbip_header *rpdu, struct urb *urb)
-{
- struct stub_priv *priv = (struct stub_priv *) urb->context;
-
- setup_base_pdu(&rpdu->base, USBIP_RET_SUBMIT, priv->seqnum);
- usbip_pack_pdu(rpdu, urb, USBIP_RET_SUBMIT, 1);
-}
-
-static void setup_ret_unlink_pdu(struct usbip_header *rpdu,
- struct stub_unlink *unlink)
-{
- setup_base_pdu(&rpdu->base, USBIP_RET_UNLINK, unlink->seqnum);
- rpdu->u.ret_unlink.status = unlink->status;
-}
-
-static struct stub_priv *dequeue_from_priv_tx(struct stub_device *sdev)
-{
- unsigned long flags;
- struct stub_priv *priv, *tmp;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- list_for_each_entry_safe(priv, tmp, &sdev->priv_tx, list) {
- list_move_tail(&priv->list, &sdev->priv_free);
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
- return priv;
- }
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return NULL;
-}
-
-static int stub_send_ret_submit(struct stub_device *sdev)
-{
- unsigned long flags;
- struct stub_priv *priv, *tmp;
-
- struct msghdr msg;
- size_t txsize;
-
- size_t total_size = 0;
-
- while ((priv = dequeue_from_priv_tx(sdev)) != NULL) {
- int ret;
- struct urb *urb = priv->urb;
- struct usbip_header pdu_header;
- struct usbip_iso_packet_descriptor *iso_buffer = NULL;
- struct kvec *iov = NULL;
- int iovnum = 0;
-
- txsize = 0;
- memset(&pdu_header, 0, sizeof(pdu_header));
- memset(&msg, 0, sizeof(msg));
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
- iovnum = 2 + urb->number_of_packets;
- else
- iovnum = 2;
-
- iov = kcalloc(iovnum, sizeof(struct kvec), GFP_KERNEL);
-
- if (!iov) {
- usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_MALLOC);
- return -1;
- }
-
- iovnum = 0;
-
- /* 1. setup usbip_header */
- setup_ret_submit_pdu(&pdu_header, urb);
- usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
- pdu_header.base.seqnum, urb);
- usbip_header_correct_endian(&pdu_header, 1);
-
- iov[iovnum].iov_base = &pdu_header;
- iov[iovnum].iov_len = sizeof(pdu_header);
- iovnum++;
- txsize += sizeof(pdu_header);
-
- /* 2. setup transfer buffer */
- if (usb_pipein(urb->pipe) &&
- usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS &&
- urb->actual_length > 0) {
- iov[iovnum].iov_base = urb->transfer_buffer;
- iov[iovnum].iov_len = urb->actual_length;
- iovnum++;
- txsize += urb->actual_length;
- } else if (usb_pipein(urb->pipe) &&
- usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- /*
- * For isochronous packets: actual length is the sum of
- * the actual length of the individual, packets, but as
- * the packet offsets are not changed there will be
- * padding between the packets. To optimally use the
- * bandwidth the padding is not transmitted.
- */
-
- int i;
-
- for (i = 0; i < urb->number_of_packets; i++) {
- iov[iovnum].iov_base = urb->transfer_buffer +
- urb->iso_frame_desc[i].offset;
- iov[iovnum].iov_len =
- urb->iso_frame_desc[i].actual_length;
- iovnum++;
- txsize += urb->iso_frame_desc[i].actual_length;
- }
-
- if (txsize != sizeof(pdu_header) + urb->actual_length) {
- dev_err(&sdev->interface->dev,
- "actual length of urb %d does not match iso packet sizes %zu\n",
- urb->actual_length,
- txsize-sizeof(pdu_header));
- kfree(iov);
- usbip_event_add(&sdev->ud,
- SDEV_EVENT_ERROR_TCP);
- return -1;
- }
- }
-
- /* 3. setup iso_packet_descriptor */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- ssize_t len = 0;
-
- iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
- if (!iso_buffer) {
- usbip_event_add(&sdev->ud,
- SDEV_EVENT_ERROR_MALLOC);
- kfree(iov);
- return -1;
- }
-
- iov[iovnum].iov_base = iso_buffer;
- iov[iovnum].iov_len = len;
- txsize += len;
- iovnum++;
- }
-
- ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
- iov, iovnum, txsize);
- if (ret != txsize) {
- dev_err(&sdev->interface->dev,
- "sendmsg failed!, retval %d for %zd\n",
- ret, txsize);
- kfree(iov);
- kfree(iso_buffer);
- usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
- return -1;
- }
-
- kfree(iov);
- kfree(iso_buffer);
-
- total_size += txsize;
- }
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
- list_for_each_entry_safe(priv, tmp, &sdev->priv_free, list) {
- stub_free_priv_and_urb(priv);
- }
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return total_size;
-}
-
-static struct stub_unlink *dequeue_from_unlink_tx(struct stub_device *sdev)
-{
- unsigned long flags;
- struct stub_unlink *unlink, *tmp;
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
- list_move_tail(&unlink->list, &sdev->unlink_free);
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
- return unlink;
- }
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return NULL;
-}
-
-static int stub_send_ret_unlink(struct stub_device *sdev)
-{
- unsigned long flags;
- struct stub_unlink *unlink, *tmp;
-
- struct msghdr msg;
- struct kvec iov[1];
- size_t txsize;
-
- size_t total_size = 0;
-
- while ((unlink = dequeue_from_unlink_tx(sdev)) != NULL) {
- int ret;
- struct usbip_header pdu_header;
-
- txsize = 0;
- memset(&pdu_header, 0, sizeof(pdu_header));
- memset(&msg, 0, sizeof(msg));
- memset(&iov, 0, sizeof(iov));
-
- usbip_dbg_stub_tx("setup ret unlink %lu\n", unlink->seqnum);
-
- /* 1. setup usbip_header */
- setup_ret_unlink_pdu(&pdu_header, unlink);
- usbip_header_correct_endian(&pdu_header, 1);
-
- iov[0].iov_base = &pdu_header;
- iov[0].iov_len = sizeof(pdu_header);
- txsize += sizeof(pdu_header);
-
- ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
- 1, txsize);
- if (ret != txsize) {
- dev_err(&sdev->interface->dev,
- "sendmsg failed!, retval %d for %zd\n",
- ret, txsize);
- usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
- return -1;
- }
-
- usbip_dbg_stub_tx("send txdata\n");
- total_size += txsize;
- }
-
- spin_lock_irqsave(&sdev->priv_lock, flags);
-
- list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free, list) {
- list_del(&unlink->list);
- kfree(unlink);
- }
-
- spin_unlock_irqrestore(&sdev->priv_lock, flags);
-
- return total_size;
-}
-
-int stub_tx_loop(void *data)
-{
- struct usbip_device *ud = data;
- struct stub_device *sdev = container_of(ud, struct stub_device, ud);
-
- while (!kthread_should_stop()) {
- if (usbip_event_happened(ud))
- break;
-
- /*
- * send_ret_submit comes earlier than send_ret_unlink. stub_rx
- * looks at only priv_init queue. If the completion of a URB is
- * earlier than the receive of CMD_UNLINK, priv is moved to
- * priv_tx queue and stub_rx does not find the target priv. In
- * this case, vhci_rx receives the result of the submit request
- * and then receives the result of the unlink request. The
- * result of the submit is given back to the usbcore as the
- * completion of the unlink request. The request of the
- * unlink is ignored. This is ok because a driver who calls
- * usb_unlink_urb() understands the unlink was too late by
- * getting the status of the given-backed URB which has the
- * status of usb_submit_urb().
- */
- if (stub_send_ret_submit(sdev) < 0)
- break;
-
- if (stub_send_ret_unlink(sdev) < 0)
- break;
-
- wait_event_interruptible(sdev->tx_waitq,
- (!list_empty(&sdev->priv_tx) ||
- !list_empty(&sdev->unlink_tx) ||
- kthread_should_stop()));
- }
-
- return 0;
-}
+++ /dev/null
-/*
- * usbip.h
- *
- * USBIP uapi defines and function prototypes etc.
-*/
-
-#ifndef _UAPI_LINUX_USBIP_H
-#define _UAPI_LINUX_USBIP_H
-
-/* usbip device status - exported in usbip device sysfs status */
-enum usbip_device_status {
- /* sdev is available. */
- SDEV_ST_AVAILABLE = 0x01,
- /* sdev is now used. */
- SDEV_ST_USED,
- /* sdev is unusable because of a fatal error. */
- SDEV_ST_ERROR,
-
- /* vdev does not connect a remote device. */
- VDEV_ST_NULL,
- /* vdev is used, but the USB address is not assigned yet */
- VDEV_ST_NOTASSIGNED,
- VDEV_ST_USED,
- VDEV_ST_ERROR
-};
-#endif /* _UAPI_LINUX_USBIP_H */
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <asm/byteorder.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <net/sock.h>
-
-#include "usbip_common.h"
-
-#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>"
-#define DRIVER_DESC "USB/IP Core"
-
-#ifdef CONFIG_USBIP_DEBUG
-unsigned long usbip_debug_flag = 0xffffffff;
-#else
-unsigned long usbip_debug_flag;
-#endif
-EXPORT_SYMBOL_GPL(usbip_debug_flag);
-module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)");
-
-/* FIXME */
-struct device_attribute dev_attr_usbip_debug;
-EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
-
-static ssize_t usbip_debug_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%lx\n", usbip_debug_flag);
-}
-
-static ssize_t usbip_debug_store(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t count)
-{
- if (sscanf(buf, "%lx", &usbip_debug_flag) != 1)
- return -EINVAL;
- return count;
-}
-DEVICE_ATTR_RW(usbip_debug);
-
-static void usbip_dump_buffer(char *buff, int bufflen)
-{
- print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4,
- buff, bufflen, false);
-}
-
-static void usbip_dump_pipe(unsigned int p)
-{
- unsigned char type = usb_pipetype(p);
- unsigned char ep = usb_pipeendpoint(p);
- unsigned char dev = usb_pipedevice(p);
- unsigned char dir = usb_pipein(p);
-
- pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT");
-
- switch (type) {
- case PIPE_ISOCHRONOUS:
- pr_debug("ISO\n");
- break;
- case PIPE_INTERRUPT:
- pr_debug("INT\n");
- break;
- case PIPE_CONTROL:
- pr_debug("CTRL\n");
- break;
- case PIPE_BULK:
- pr_debug("BULK\n");
- break;
- default:
- pr_debug("ERR\n");
- break;
- }
-}
-
-static void usbip_dump_usb_device(struct usb_device *udev)
-{
- struct device *dev = &udev->dev;
- int i;
-
- dev_dbg(dev, " devnum(%d) devpath(%s) usb speed(%s)",
- udev->devnum, udev->devpath, usb_speed_string(udev->speed));
-
- pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport);
-
- dev_dbg(dev, " ");
- for (i = 0; i < 16; i++)
- pr_debug(" %2u", i);
- pr_debug("\n");
-
- dev_dbg(dev, " toggle0(IN) :");
- for (i = 0; i < 16; i++)
- pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
- pr_debug("\n");
-
- dev_dbg(dev, " toggle1(OUT):");
- for (i = 0; i < 16; i++)
- pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
- pr_debug("\n");
-
- dev_dbg(dev, " epmaxp_in :");
- for (i = 0; i < 16; i++) {
- if (udev->ep_in[i])
- pr_debug(" %2u",
- le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
- }
- pr_debug("\n");
-
- dev_dbg(dev, " epmaxp_out :");
- for (i = 0; i < 16; i++) {
- if (udev->ep_out[i])
- pr_debug(" %2u",
- le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
- }
- pr_debug("\n");
-
- dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
-
- dev_dbg(dev,
- "descriptor %p, config %p, actconfig %p, rawdescriptors %p\n",
- &udev->descriptor, udev->config,
- udev->actconfig, udev->rawdescriptors);
-
- dev_dbg(dev, "have_langid %d, string_langid %d\n",
- udev->have_langid, udev->string_langid);
-
- dev_dbg(dev, "maxchild %d\n", udev->maxchild);
-}
-
-static void usbip_dump_request_type(__u8 rt)
-{
- switch (rt & USB_RECIP_MASK) {
- case USB_RECIP_DEVICE:
- pr_debug("DEVICE");
- break;
- case USB_RECIP_INTERFACE:
- pr_debug("INTERF");
- break;
- case USB_RECIP_ENDPOINT:
- pr_debug("ENDPOI");
- break;
- case USB_RECIP_OTHER:
- pr_debug("OTHER ");
- break;
- default:
- pr_debug("------");
- break;
- }
-}
-
-static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
-{
- if (!cmd) {
- pr_debug(" : null pointer\n");
- return;
- }
-
- pr_debug(" ");
- pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) wLength(%04X) ",
- cmd->bRequestType, cmd->bRequest,
- cmd->wValue, cmd->wIndex, cmd->wLength);
- pr_debug("\n ");
-
- if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
- pr_debug("STANDARD ");
- switch (cmd->bRequest) {
- case USB_REQ_GET_STATUS:
- pr_debug("GET_STATUS\n");
- break;
- case USB_REQ_CLEAR_FEATURE:
- pr_debug("CLEAR_FEAT\n");
- break;
- case USB_REQ_SET_FEATURE:
- pr_debug("SET_FEAT\n");
- break;
- case USB_REQ_SET_ADDRESS:
- pr_debug("SET_ADDRRS\n");
- break;
- case USB_REQ_GET_DESCRIPTOR:
- pr_debug("GET_DESCRI\n");
- break;
- case USB_REQ_SET_DESCRIPTOR:
- pr_debug("SET_DESCRI\n");
- break;
- case USB_REQ_GET_CONFIGURATION:
- pr_debug("GET_CONFIG\n");
- break;
- case USB_REQ_SET_CONFIGURATION:
- pr_debug("SET_CONFIG\n");
- break;
- case USB_REQ_GET_INTERFACE:
- pr_debug("GET_INTERF\n");
- break;
- case USB_REQ_SET_INTERFACE:
- pr_debug("SET_INTERF\n");
- break;
- case USB_REQ_SYNCH_FRAME:
- pr_debug("SYNC_FRAME\n");
- break;
- default:
- pr_debug("REQ(%02X)\n", cmd->bRequest);
- break;
- }
- usbip_dump_request_type(cmd->bRequestType);
- } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {
- pr_debug("CLASS\n");
- } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) {
- pr_debug("VENDOR\n");
- } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) {
- pr_debug("RESERVED\n");
- }
-}
-
-void usbip_dump_urb(struct urb *urb)
-{
- struct device *dev;
-
- if (!urb) {
- pr_debug("urb: null pointer!!\n");
- return;
- }
-
- if (!urb->dev) {
- pr_debug("urb->dev: null pointer!!\n");
- return;
- }
-
- dev = &urb->dev->dev;
-
- dev_dbg(dev, " urb :%p\n", urb);
- dev_dbg(dev, " dev :%p\n", urb->dev);
-
- usbip_dump_usb_device(urb->dev);
-
- dev_dbg(dev, " pipe :%08x ", urb->pipe);
-
- usbip_dump_pipe(urb->pipe);
-
- dev_dbg(dev, " status :%d\n", urb->status);
- dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
- dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
- dev_dbg(dev, " transfer_buffer_length:%d\n",
- urb->transfer_buffer_length);
- dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
- dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
-
- if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
- usbip_dump_usb_ctrlrequest(
- (struct usb_ctrlrequest *)urb->setup_packet);
-
- dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
- dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
- dev_dbg(dev, " interval :%d\n", urb->interval);
- dev_dbg(dev, " error_count :%d\n", urb->error_count);
- dev_dbg(dev, " context :%p\n", urb->context);
- dev_dbg(dev, " complete :%p\n", urb->complete);
-}
-EXPORT_SYMBOL_GPL(usbip_dump_urb);
-
-void usbip_dump_header(struct usbip_header *pdu)
-{
- pr_debug("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
- pdu->base.command,
- pdu->base.seqnum,
- pdu->base.devid,
- pdu->base.direction,
- pdu->base.ep);
-
- switch (pdu->base.command) {
- case USBIP_CMD_SUBMIT:
- pr_debug("USBIP_CMD_SUBMIT: x_flags %u x_len %u sf %u #p %d iv %d\n",
- pdu->u.cmd_submit.transfer_flags,
- pdu->u.cmd_submit.transfer_buffer_length,
- pdu->u.cmd_submit.start_frame,
- pdu->u.cmd_submit.number_of_packets,
- pdu->u.cmd_submit.interval);
- break;
- case USBIP_CMD_UNLINK:
- pr_debug("USBIP_CMD_UNLINK: seq %u\n",
- pdu->u.cmd_unlink.seqnum);
- break;
- case USBIP_RET_SUBMIT:
- pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n",
- pdu->u.ret_submit.status,
- pdu->u.ret_submit.actual_length,
- pdu->u.ret_submit.start_frame,
- pdu->u.ret_submit.number_of_packets,
- pdu->u.ret_submit.error_count);
- break;
- case USBIP_RET_UNLINK:
- pr_debug("USBIP_RET_UNLINK: status %d\n",
- pdu->u.ret_unlink.status);
- break;
- default:
- /* NOT REACHED */
- pr_err("unknown command\n");
- break;
- }
-}
-EXPORT_SYMBOL_GPL(usbip_dump_header);
-
-/* Receive data over TCP/IP. */
-int usbip_recv(struct socket *sock, void *buf, int size)
-{
- int result;
- struct msghdr msg;
- struct kvec iov;
- int total = 0;
-
- /* for blocks of if (usbip_dbg_flag_xmit) */
- char *bp = buf;
- int osize = size;
-
- usbip_dbg_xmit("enter\n");
-
- if (!sock || !buf || !size) {
- pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf,
- size);
- return -EINVAL;
- }
-
- do {
- sock->sk->sk_allocation = GFP_NOIO;
- iov.iov_base = buf;
- iov.iov_len = size;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_control = NULL;
- msg.msg_controllen = 0;
- msg.msg_flags = MSG_NOSIGNAL;
-
- result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL);
- if (result <= 0) {
- pr_debug("receive sock %p buf %p size %u ret %d total %d\n",
- sock, buf, size, result, total);
- goto err;
- }
-
- size -= result;
- buf += result;
- total += result;
- } while (size > 0);
-
- if (usbip_dbg_flag_xmit) {
- if (!in_interrupt())
- pr_debug("%-10s:", current->comm);
- else
- pr_debug("interrupt :");
-
- pr_debug("receiving....\n");
- usbip_dump_buffer(bp, osize);
- pr_debug("received, osize %d ret %d size %d total %d\n",
- osize, result, size, total);
- }
-
- return total;
-
-err:
- return result;
-}
-EXPORT_SYMBOL_GPL(usbip_recv);
-
-/* there may be more cases to tweak the flags. */
-static unsigned int tweak_transfer_flags(unsigned int flags)
-{
- flags &= ~URB_NO_TRANSFER_DMA_MAP;
- return flags;
-}
-
-static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
- int pack)
-{
- struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
-
- /*
- * Some members are not still implemented in usbip. I hope this issue
- * will be discussed when usbip is ported to other operating systems.
- */
- if (pack) {
- spdu->transfer_flags =
- tweak_transfer_flags(urb->transfer_flags);
- spdu->transfer_buffer_length = urb->transfer_buffer_length;
- spdu->start_frame = urb->start_frame;
- spdu->number_of_packets = urb->number_of_packets;
- spdu->interval = urb->interval;
- } else {
- urb->transfer_flags = spdu->transfer_flags;
- urb->transfer_buffer_length = spdu->transfer_buffer_length;
- urb->start_frame = spdu->start_frame;
- urb->number_of_packets = spdu->number_of_packets;
- urb->interval = spdu->interval;
- }
-}
-
-static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
- int pack)
-{
- struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
-
- if (pack) {
- rpdu->status = urb->status;
- rpdu->actual_length = urb->actual_length;
- rpdu->start_frame = urb->start_frame;
- rpdu->number_of_packets = urb->number_of_packets;
- rpdu->error_count = urb->error_count;
- } else {
- urb->status = rpdu->status;
- urb->actual_length = rpdu->actual_length;
- urb->start_frame = rpdu->start_frame;
- urb->number_of_packets = rpdu->number_of_packets;
- urb->error_count = rpdu->error_count;
- }
-}
-
-void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
- int pack)
-{
- switch (cmd) {
- case USBIP_CMD_SUBMIT:
- usbip_pack_cmd_submit(pdu, urb, pack);
- break;
- case USBIP_RET_SUBMIT:
- usbip_pack_ret_submit(pdu, urb, pack);
- break;
- default:
- /* NOT REACHED */
- pr_err("unknown command\n");
- break;
- }
-}
-EXPORT_SYMBOL_GPL(usbip_pack_pdu);
-
-static void correct_endian_basic(struct usbip_header_basic *base, int send)
-{
- if (send) {
- base->command = cpu_to_be32(base->command);
- base->seqnum = cpu_to_be32(base->seqnum);
- base->devid = cpu_to_be32(base->devid);
- base->direction = cpu_to_be32(base->direction);
- base->ep = cpu_to_be32(base->ep);
- } else {
- base->command = be32_to_cpu(base->command);
- base->seqnum = be32_to_cpu(base->seqnum);
- base->devid = be32_to_cpu(base->devid);
- base->direction = be32_to_cpu(base->direction);
- base->ep = be32_to_cpu(base->ep);
- }
-}
-
-static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
- int send)
-{
- if (send) {
- pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
-
- cpu_to_be32s(&pdu->transfer_buffer_length);
- cpu_to_be32s(&pdu->start_frame);
- cpu_to_be32s(&pdu->number_of_packets);
- cpu_to_be32s(&pdu->interval);
- } else {
- pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
-
- be32_to_cpus(&pdu->transfer_buffer_length);
- be32_to_cpus(&pdu->start_frame);
- be32_to_cpus(&pdu->number_of_packets);
- be32_to_cpus(&pdu->interval);
- }
-}
-
-static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
- int send)
-{
- if (send) {
- cpu_to_be32s(&pdu->status);
- cpu_to_be32s(&pdu->actual_length);
- cpu_to_be32s(&pdu->start_frame);
- cpu_to_be32s(&pdu->number_of_packets);
- cpu_to_be32s(&pdu->error_count);
- } else {
- be32_to_cpus(&pdu->status);
- be32_to_cpus(&pdu->actual_length);
- be32_to_cpus(&pdu->start_frame);
- be32_to_cpus(&pdu->number_of_packets);
- be32_to_cpus(&pdu->error_count);
- }
-}
-
-static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
- int send)
-{
- if (send)
- pdu->seqnum = cpu_to_be32(pdu->seqnum);
- else
- pdu->seqnum = be32_to_cpu(pdu->seqnum);
-}
-
-static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
- int send)
-{
- if (send)
- cpu_to_be32s(&pdu->status);
- else
- be32_to_cpus(&pdu->status);
-}
-
-void usbip_header_correct_endian(struct usbip_header *pdu, int send)
-{
- __u32 cmd = 0;
-
- if (send)
- cmd = pdu->base.command;
-
- correct_endian_basic(&pdu->base, send);
-
- if (!send)
- cmd = pdu->base.command;
-
- switch (cmd) {
- case USBIP_CMD_SUBMIT:
- correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
- break;
- case USBIP_RET_SUBMIT:
- correct_endian_ret_submit(&pdu->u.ret_submit, send);
- break;
- case USBIP_CMD_UNLINK:
- correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
- break;
- case USBIP_RET_UNLINK:
- correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
- break;
- default:
- /* NOT REACHED */
- pr_err("unknown command\n");
- break;
- }
-}
-EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
-
-static void usbip_iso_packet_correct_endian(
- struct usbip_iso_packet_descriptor *iso, int send)
-{
- /* does not need all members. but copy all simply. */
- if (send) {
- iso->offset = cpu_to_be32(iso->offset);
- iso->length = cpu_to_be32(iso->length);
- iso->status = cpu_to_be32(iso->status);
- iso->actual_length = cpu_to_be32(iso->actual_length);
- } else {
- iso->offset = be32_to_cpu(iso->offset);
- iso->length = be32_to_cpu(iso->length);
- iso->status = be32_to_cpu(iso->status);
- iso->actual_length = be32_to_cpu(iso->actual_length);
- }
-}
-
-static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
- struct usb_iso_packet_descriptor *uiso, int pack)
-{
- if (pack) {
- iso->offset = uiso->offset;
- iso->length = uiso->length;
- iso->status = uiso->status;
- iso->actual_length = uiso->actual_length;
- } else {
- uiso->offset = iso->offset;
- uiso->length = iso->length;
- uiso->status = iso->status;
- uiso->actual_length = iso->actual_length;
- }
-}
-
-/* must free buffer */
-struct usbip_iso_packet_descriptor*
-usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
-{
- struct usbip_iso_packet_descriptor *iso;
- int np = urb->number_of_packets;
- ssize_t size = np * sizeof(*iso);
- int i;
-
- iso = kzalloc(size, GFP_KERNEL);
- if (!iso)
- return NULL;
-
- for (i = 0; i < np; i++) {
- usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1);
- usbip_iso_packet_correct_endian(&iso[i], 1);
- }
-
- *bufflen = size;
-
- return iso;
-}
-EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
-
-/* some members of urb must be substituted before. */
-int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
-{
- void *buff;
- struct usbip_iso_packet_descriptor *iso;
- int np = urb->number_of_packets;
- int size = np * sizeof(*iso);
- int i;
- int ret;
- int total_length = 0;
-
- if (!usb_pipeisoc(urb->pipe))
- return 0;
-
- /* my Bluetooth dongle gets ISO URBs which are np = 0 */
- if (np == 0)
- return 0;
-
- buff = kzalloc(size, GFP_KERNEL);
- if (!buff)
- return -ENOMEM;
-
- ret = usbip_recv(ud->tcp_socket, buff, size);
- if (ret != size) {
- dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
- ret);
- kfree(buff);
-
- if (ud->side == USBIP_STUB)
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- else
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
-
- return -EPIPE;
- }
-
- iso = (struct usbip_iso_packet_descriptor *) buff;
- for (i = 0; i < np; i++) {
- usbip_iso_packet_correct_endian(&iso[i], 0);
- usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0);
- total_length += urb->iso_frame_desc[i].actual_length;
- }
-
- kfree(buff);
-
- if (total_length != urb->actual_length) {
- dev_err(&urb->dev->dev,
- "total length of iso packets %d not equal to actual length of buffer %d\n",
- total_length, urb->actual_length);
-
- if (ud->side == USBIP_STUB)
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- else
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
-
- return -EPIPE;
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(usbip_recv_iso);
-
-/*
- * This functions restores the padding which was removed for optimizing
- * the bandwidth during transfer over tcp/ip
- *
- * buffer and iso packets need to be stored and be in propeper endian in urb
- * before calling this function
- */
-void usbip_pad_iso(struct usbip_device *ud, struct urb *urb)
-{
- int np = urb->number_of_packets;
- int i;
- int actualoffset = urb->actual_length;
-
- if (!usb_pipeisoc(urb->pipe))
- return;
-
- /* if no packets or length of data is 0, then nothing to unpack */
- if (np == 0 || urb->actual_length == 0)
- return;
-
- /*
- * if actual_length is transfer_buffer_length then no padding is
- * present.
- */
- if (urb->actual_length == urb->transfer_buffer_length)
- return;
-
- /*
- * loop over all packets from last to first (to prevent overwritting
- * memory when padding) and move them into the proper place
- */
- for (i = np-1; i > 0; i--) {
- actualoffset -= urb->iso_frame_desc[i].actual_length;
- memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset,
- urb->transfer_buffer + actualoffset,
- urb->iso_frame_desc[i].actual_length);
- }
-}
-EXPORT_SYMBOL_GPL(usbip_pad_iso);
-
-/* some members of urb must be substituted before. */
-int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
-{
- int ret;
- int size;
-
- if (ud->side == USBIP_STUB) {
- /* the direction of urb must be OUT. */
- if (usb_pipein(urb->pipe))
- return 0;
-
- size = urb->transfer_buffer_length;
- } else {
- /* the direction of urb must be IN. */
- if (usb_pipeout(urb->pipe))
- return 0;
-
- size = urb->actual_length;
- }
-
- /* no need to recv xbuff */
- if (!(size > 0))
- return 0;
-
- ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
- if (ret != size) {
- dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
- if (ud->side == USBIP_STUB) {
- usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
- } else {
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
- return -EPIPE;
- }
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
-
-static int __init usbip_core_init(void)
-{
- pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
- return 0;
-}
-
-static void __exit usbip_core_exit(void)
-{
- return;
-}
-
-module_init(usbip_core_init);
-module_exit(usbip_core_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_VERSION(USBIP_VERSION);
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#ifndef __USBIP_COMMON_H
-#define __USBIP_COMMON_H
-
-#include <linux/compiler.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/net.h>
-#include <linux/printk.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/usb.h>
-#include <linux/wait.h>
-#include "uapi/usbip.h"
-
-#define USBIP_VERSION "1.0.0"
-
-#undef pr_fmt
-
-#ifdef DEBUG
-#define pr_fmt(fmt) KBUILD_MODNAME ": %s:%d: " fmt, __func__, __LINE__
-#else
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#endif
-
-enum {
- usbip_debug_xmit = (1 << 0),
- usbip_debug_sysfs = (1 << 1),
- usbip_debug_urb = (1 << 2),
- usbip_debug_eh = (1 << 3),
-
- usbip_debug_stub_cmp = (1 << 8),
- usbip_debug_stub_dev = (1 << 9),
- usbip_debug_stub_rx = (1 << 10),
- usbip_debug_stub_tx = (1 << 11),
-
- usbip_debug_vhci_rh = (1 << 8),
- usbip_debug_vhci_hc = (1 << 9),
- usbip_debug_vhci_rx = (1 << 10),
- usbip_debug_vhci_tx = (1 << 11),
- usbip_debug_vhci_sysfs = (1 << 12)
-};
-
-#define usbip_dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
-#define usbip_dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
-#define usbip_dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
-#define usbip_dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
-#define usbip_dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
-#define usbip_dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
-#define usbip_dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
-#define usbip_dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
-
-extern unsigned long usbip_debug_flag;
-extern struct device_attribute dev_attr_usbip_debug;
-
-#define usbip_dbg_with_flag(flag, fmt, args...) \
- do { \
- if (flag & usbip_debug_flag) \
- pr_debug(fmt, ##args); \
- } while (0)
-
-#define usbip_dbg_sysfs(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
-#define usbip_dbg_xmit(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_xmit, fmt , ##args)
-#define usbip_dbg_urb(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_urb, fmt , ##args)
-#define usbip_dbg_eh(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_eh, fmt , ##args)
-
-#define usbip_dbg_vhci_rh(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
-#define usbip_dbg_vhci_hc(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
-#define usbip_dbg_vhci_rx(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
-#define usbip_dbg_vhci_tx(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
-#define usbip_dbg_vhci_sysfs(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
-
-#define usbip_dbg_stub_cmp(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
-#define usbip_dbg_stub_rx(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
-#define usbip_dbg_stub_tx(fmt, args...) \
- usbip_dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
-
-/*
- * USB/IP request headers
- *
- * Each request is transferred across the network to its counterpart, which
- * facilitates the normal USB communication. The values contained in the headers
- * are basically the same as in a URB. Currently, four request types are
- * defined:
- *
- * - USBIP_CMD_SUBMIT: a USB request block, corresponds to usb_submit_urb()
- * (client to server)
- *
- * - USBIP_RET_SUBMIT: the result of USBIP_CMD_SUBMIT
- * (server to client)
- *
- * - USBIP_CMD_UNLINK: an unlink request of a pending USBIP_CMD_SUBMIT,
- * corresponds to usb_unlink_urb()
- * (client to server)
- *
- * - USBIP_RET_UNLINK: the result of USBIP_CMD_UNLINK
- * (server to client)
- *
- */
-#define USBIP_CMD_SUBMIT 0x0001
-#define USBIP_CMD_UNLINK 0x0002
-#define USBIP_RET_SUBMIT 0x0003
-#define USBIP_RET_UNLINK 0x0004
-
-#define USBIP_DIR_OUT 0x00
-#define USBIP_DIR_IN 0x01
-
-/**
- * struct usbip_header_basic - data pertinent to every request
- * @command: the usbip request type
- * @seqnum: sequential number that identifies requests; incremented per
- * connection
- * @devid: specifies a remote USB device uniquely instead of busnum and devnum;
- * in the stub driver, this value is ((busnum << 16) | devnum)
- * @direction: direction of the transfer
- * @ep: endpoint number
- */
-struct usbip_header_basic {
- __u32 command;
- __u32 seqnum;
- __u32 devid;
- __u32 direction;
- __u32 ep;
-} __packed;
-
-/**
- * struct usbip_header_cmd_submit - USBIP_CMD_SUBMIT packet header
- * @transfer_flags: URB flags
- * @transfer_buffer_length: the data size for (in) or (out) transfer
- * @start_frame: initial frame for isochronous or interrupt transfers
- * @number_of_packets: number of isochronous packets
- * @interval: maximum time for the request on the server-side host controller
- * @setup: setup data for a control request
- */
-struct usbip_header_cmd_submit {
- __u32 transfer_flags;
- __s32 transfer_buffer_length;
-
- /* it is difficult for usbip to sync frames (reserved only?) */
- __s32 start_frame;
- __s32 number_of_packets;
- __s32 interval;
-
- unsigned char setup[8];
-} __packed;
-
-/**
- * struct usbip_header_ret_submit - USBIP_RET_SUBMIT packet header
- * @status: return status of a non-iso request
- * @actual_length: number of bytes transferred
- * @start_frame: initial frame for isochronous or interrupt transfers
- * @number_of_packets: number of isochronous packets
- * @error_count: number of errors for isochronous transfers
- */
-struct usbip_header_ret_submit {
- __s32 status;
- __s32 actual_length;
- __s32 start_frame;
- __s32 number_of_packets;
- __s32 error_count;
-} __packed;
-
-/**
- * struct usbip_header_cmd_unlink - USBIP_CMD_UNLINK packet header
- * @seqnum: the URB seqnum to unlink
- */
-struct usbip_header_cmd_unlink {
- __u32 seqnum;
-} __packed;
-
-/**
- * struct usbip_header_ret_unlink - USBIP_RET_UNLINK packet header
- * @status: return status of the request
- */
-struct usbip_header_ret_unlink {
- __s32 status;
-} __packed;
-
-/**
- * struct usbip_header - common header for all usbip packets
- * @base: the basic header
- * @u: packet type dependent header
- */
-struct usbip_header {
- struct usbip_header_basic base;
-
- union {
- struct usbip_header_cmd_submit cmd_submit;
- struct usbip_header_ret_submit ret_submit;
- struct usbip_header_cmd_unlink cmd_unlink;
- struct usbip_header_ret_unlink ret_unlink;
- } u;
-} __packed;
-
-/*
- * This is the same as usb_iso_packet_descriptor but packed for pdu.
- */
-struct usbip_iso_packet_descriptor {
- __u32 offset;
- __u32 length; /* expected length */
- __u32 actual_length;
- __u32 status;
-} __packed;
-
-enum usbip_side {
- USBIP_VHCI,
- USBIP_STUB,
-};
-
-/* event handler */
-#define USBIP_EH_SHUTDOWN (1 << 0)
-#define USBIP_EH_BYE (1 << 1)
-#define USBIP_EH_RESET (1 << 2)
-#define USBIP_EH_UNUSABLE (1 << 3)
-
-#define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
-#define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
-#define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
-#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
-#define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
-
-#define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
-#define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
-#define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
-#define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
-
-/* a common structure for stub_device and vhci_device */
-struct usbip_device {
- enum usbip_side side;
- enum usbip_device_status status;
-
- /* lock for status */
- spinlock_t lock;
-
- struct socket *tcp_socket;
-
- struct task_struct *tcp_rx;
- struct task_struct *tcp_tx;
-
- unsigned long event;
- struct task_struct *eh;
- wait_queue_head_t eh_waitq;
-
- struct eh_ops {
- void (*shutdown)(struct usbip_device *);
- void (*reset)(struct usbip_device *);
- void (*unusable)(struct usbip_device *);
- } eh_ops;
-};
-
-#define kthread_get_run(threadfn, data, namefmt, ...) \
-({ \
- struct task_struct *__k \
- = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
- if (!IS_ERR(__k)) { \
- get_task_struct(__k); \
- wake_up_process(__k); \
- } \
- __k; \
-})
-
-#define kthread_stop_put(k) \
- do { \
- kthread_stop(k); \
- put_task_struct(k); \
- } while (0)
-
-/* usbip_common.c */
-void usbip_dump_urb(struct urb *purb);
-void usbip_dump_header(struct usbip_header *pdu);
-
-int usbip_recv(struct socket *sock, void *buf, int size);
-
-void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
- int pack);
-void usbip_header_correct_endian(struct usbip_header *pdu, int send);
-
-struct usbip_iso_packet_descriptor*
-usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
-
-/* some members of urb must be substituted before. */
-int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
-void usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
-int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
-
-/* usbip_event.c */
-int usbip_start_eh(struct usbip_device *ud);
-void usbip_stop_eh(struct usbip_device *ud);
-void usbip_event_add(struct usbip_device *ud, unsigned long event);
-int usbip_event_happened(struct usbip_device *ud);
-
-static inline int interface_to_busnum(struct usb_interface *interface)
-{
- struct usb_device *udev = interface_to_usbdev(interface);
-
- return udev->bus->busnum;
-}
-
-static inline int interface_to_devnum(struct usb_interface *interface)
-{
- struct usb_device *udev = interface_to_usbdev(interface);
-
- return udev->devnum;
-}
-
-#endif /* __USBIP_COMMON_H */
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/export.h>
-
-#include "usbip_common.h"
-
-static int event_handler(struct usbip_device *ud)
-{
- usbip_dbg_eh("enter\n");
-
- /*
- * Events are handled by only this thread.
- */
- while (usbip_event_happened(ud)) {
- usbip_dbg_eh("pending event %lx\n", ud->event);
-
- /*
- * NOTE: shutdown must come first.
- * Shutdown the device.
- */
- if (ud->event & USBIP_EH_SHUTDOWN) {
- ud->eh_ops.shutdown(ud);
- ud->event &= ~USBIP_EH_SHUTDOWN;
- }
-
- /* Reset the device. */
- if (ud->event & USBIP_EH_RESET) {
- ud->eh_ops.reset(ud);
- ud->event &= ~USBIP_EH_RESET;
- }
-
- /* Mark the device as unusable. */
- if (ud->event & USBIP_EH_UNUSABLE) {
- ud->eh_ops.unusable(ud);
- ud->event &= ~USBIP_EH_UNUSABLE;
- }
-
- /* Stop the error handler. */
- if (ud->event & USBIP_EH_BYE)
- return -1;
- }
-
- return 0;
-}
-
-static int event_handler_loop(void *data)
-{
- struct usbip_device *ud = data;
-
- while (!kthread_should_stop()) {
- wait_event_interruptible(ud->eh_waitq,
- usbip_event_happened(ud) ||
- kthread_should_stop());
- usbip_dbg_eh("wakeup\n");
-
- if (event_handler(ud) < 0)
- break;
- }
-
- return 0;
-}
-
-int usbip_start_eh(struct usbip_device *ud)
-{
- init_waitqueue_head(&ud->eh_waitq);
- ud->event = 0;
-
- ud->eh = kthread_run(event_handler_loop, ud, "usbip_eh");
- if (IS_ERR(ud->eh)) {
- pr_warn("Unable to start control thread\n");
- return PTR_ERR(ud->eh);
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(usbip_start_eh);
-
-void usbip_stop_eh(struct usbip_device *ud)
-{
- if (ud->eh == current)
- return; /* do not wait for myself */
-
- kthread_stop(ud->eh);
- usbip_dbg_eh("usbip_eh has finished\n");
-}
-EXPORT_SYMBOL_GPL(usbip_stop_eh);
-
-void usbip_event_add(struct usbip_device *ud, unsigned long event)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ud->lock, flags);
- ud->event |= event;
- wake_up(&ud->eh_waitq);
- spin_unlock_irqrestore(&ud->lock, flags);
-}
-EXPORT_SYMBOL_GPL(usbip_event_add);
-
-int usbip_event_happened(struct usbip_device *ud)
-{
- int happened = 0;
-
- spin_lock(&ud->lock);
- if (ud->event != 0)
- happened = 1;
- spin_unlock(&ud->lock);
-
- return happened;
-}
-EXPORT_SYMBOL_GPL(usbip_event_happened);
+++ /dev/null
-PRELIMINARY DRAFT, MAY CONTAIN MISTAKES!
-28 Jun 2011
-
-The USB/IP protocol follows a server/client architecture. The server exports the
-USB devices and the clients imports them. The device driver for the exported
-USB device runs on the client machine.
-
-The client may ask for the list of the exported USB devices. To get the list the
-client opens a TCP/IP connection towards the server, and sends an OP_REQ_DEVLIST
-packet on top of the TCP/IP connection (so the actual OP_REQ_DEVLIST may be sent
-in one or more pieces at the low level transport layer). The server sends back
-the OP_REP_DEVLIST packet which lists the exported USB devices. Finally the
-TCP/IP connection is closed.
-
- virtual host controller usb host
- "client" "server"
- (imports USB devices) (exports USB devices)
- | |
- | OP_REQ_DEVLIST |
- | ----------------------------------------------> |
- | |
- | OP_REP_DEVLIST |
- | <---------------------------------------------- |
- | |
-
-Once the client knows the list of exported USB devices it may decide to use one
-of them. First the client opens a TCP/IP connection towards the server and
-sends an OP_REQ_IMPORT packet. The server replies with OP_REP_IMPORT. If the
-import was successful the TCP/IP connection remains open and will be used
-to transfer the URB traffic between the client and the server. The client may
-send two types of packets: the USBIP_CMD_SUBMIT to submit an URB, and
-USBIP_CMD_UNLINK to unlink a previously submitted URB. The answers of the
-server may be USBIP_RET_SUBMIT and USBIP_RET_UNLINK respectively.
-
- virtual host controller usb host
- "client" "server"
- (imports USB devices) (exports USB devices)
- | |
- | OP_REQ_IMPORT |
- | ----------------------------------------------> |
- | |
- | OP_REP_IMPORT |
- | <---------------------------------------------- |
- | |
- | |
- | USBIP_CMD_SUBMIT(seqnum = n) |
- | ----------------------------------------------> |
- | |
- | USBIP_RET_SUBMIT(seqnum = n) |
- | <---------------------------------------------- |
- | . |
- | : |
- | |
- | USBIP_CMD_SUBMIT(seqnum = m) |
- | ----------------------------------------------> |
- | |
- | USBIP_CMD_SUBMIT(seqnum = m+1) |
- | ----------------------------------------------> |
- | |
- | USBIP_CMD_SUBMIT(seqnum = m+2) |
- | ----------------------------------------------> |
- | |
- | USBIP_RET_SUBMIT(seqnum = m) |
- | <---------------------------------------------- |
- | |
- | USBIP_CMD_SUBMIT(seqnum = m+3) |
- | ----------------------------------------------> |
- | |
- | USBIP_RET_SUBMIT(seqnum = m+1) |
- | <---------------------------------------------- |
- | |
- | USBIP_CMD_SUBMIT(seqnum = m+4) |
- | ----------------------------------------------> |
- | |
- | USBIP_RET_SUBMIT(seqnum = m+2) |
- | <---------------------------------------------- |
- | . |
- | : |
- | |
- | USBIP_CMD_UNLINK |
- | ----------------------------------------------> |
- | |
- | USBIP_RET_UNLINK |
- | <---------------------------------------------- |
- | |
-
-The fields are in network (big endian) byte order meaning that the most significant
-byte (MSB) is stored at the lowest address.
-
-
-OP_REQ_DEVLIST: Retrieve the list of exported USB devices.
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
------------+--------+------------+---------------------------------------------------
- 2 | 2 | 0x8005 | Command code: Retrieve the list of exported USB
- | | | devices.
------------+--------+------------+---------------------------------------------------
- 4 | 4 | 0x00000000 | Status: unused, shall be set to 0
-
-OP_REP_DEVLIST: Reply with the list of exported USB devices.
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0.
------------+--------+------------+---------------------------------------------------
- 2 | 2 | 0x0005 | Reply code: The list of exported USB devices.
------------+--------+------------+---------------------------------------------------
- 4 | 4 | 0x00000000 | Status: 0 for OK
------------+--------+------------+---------------------------------------------------
- 8 | 4 | n | Number of exported devices: 0 means no exported
- | | | devices.
------------+--------+------------+---------------------------------------------------
- 0x0C | | | From now on the exported n devices are described,
- | | | if any. If no devices are exported the message
- | | | ends with the previous "number of exported
- | | | devices" field.
------------+--------+------------+---------------------------------------------------
- | 256 | | path: Path of the device on the host exporting the
- | | | USB device, string closed with zero byte, e.g.
- | | | "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-2"
- | | | The unused bytes shall be filled with zero
- | | | bytes.
------------+--------+------------+---------------------------------------------------
- 0x10C | 32 | | busid: Bus ID of the exported device, string
- | | | closed with zero byte, e.g. "3-2". The unused
- | | | bytes shall be filled with zero bytes.
------------+--------+------------+---------------------------------------------------
- 0x12C | 4 | | busnum
------------+--------+------------+---------------------------------------------------
- 0x130 | 4 | | devnum
------------+--------+------------+---------------------------------------------------
- 0x134 | 4 | | speed
------------+--------+------------+---------------------------------------------------
- 0x138 | 2 | | idVendor
------------+--------+------------+---------------------------------------------------
- 0x13A | 2 | | idProduct
------------+--------+------------+---------------------------------------------------
- 0x13C | 2 | | bcdDevice
------------+--------+------------+---------------------------------------------------
- 0x13E | 1 | | bDeviceClass
------------+--------+------------+---------------------------------------------------
- 0x13F | 1 | | bDeviceSubClass
------------+--------+------------+---------------------------------------------------
- 0x140 | 1 | | bDeviceProtocol
------------+--------+------------+---------------------------------------------------
- 0x141 | 1 | | bConfigurationValue
------------+--------+------------+---------------------------------------------------
- 0x142 | 1 | | bNumConfigurations
------------+--------+------------+---------------------------------------------------
- 0x143 | 1 | | bNumInterfaces
------------+--------+------------+---------------------------------------------------
- 0x144 | | m_0 | From now on each interface is described, all
- | | | together bNumInterfaces times, with the
- | | | the following 4 fields:
------------+--------+------------+---------------------------------------------------
- | 1 | | bInterfaceClass
------------+--------+------------+---------------------------------------------------
- 0x145 | 1 | | bInterfaceSubClass
------------+--------+------------+---------------------------------------------------
- 0x146 | 1 | | bInterfaceProtocol
------------+--------+------------+---------------------------------------------------
- 0x147 | 1 | | padding byte for alignment, shall be set to zero
------------+--------+------------+---------------------------------------------------
- 0xC + | | | The second exported USB device starts at i=1
- i*0x138 + | | | with the busid field.
- m_(i-1)*4 | | |
-
-OP_REQ_IMPORT: Request to import (attach) a remote USB device.
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
------------+--------+------------+---------------------------------------------------
- 2 | 2 | 0x8003 | Command code: import a remote USB device.
------------+--------+------------+---------------------------------------------------
- 4 | 4 | 0x00000000 | Status: unused, shall be set to 0
------------+--------+------------+---------------------------------------------------
- 8 | 32 | | busid: the busid of the exported device on the
- | | | remote host. The possible values are taken
- | | | from the message field OP_REP_DEVLIST.busid.
- | | | A string closed with zero, the unused bytes
- | | | shall be filled with zeros.
------------+--------+------------+---------------------------------------------------
-
-OP_REP_IMPORT: Reply to import (attach) a remote USB device.
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
------------+--------+------------+---------------------------------------------------
- 2 | 2 | 0x0003 | Reply code: Reply to import.
------------+--------+------------+---------------------------------------------------
- 4 | 4 | 0x00000000 | Status: 0 for OK
- | | | 1 for error
------------+--------+------------+---------------------------------------------------
- 8 | | | From now on comes the details of the imported
- | | | device, if the previous status field was OK (0),
- | | | otherwise the reply ends with the status field.
------------+--------+------------+---------------------------------------------------
- | 256 | | path: Path of the device on the host exporting the
- | | | USB device, string closed with zero byte, e.g.
- | | | "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-2"
- | | | The unused bytes shall be filled with zero
- | | | bytes.
------------+--------+------------+---------------------------------------------------
- 0x108 | 32 | | busid: Bus ID of the exported device, string
- | | | closed with zero byte, e.g. "3-2". The unused
- | | | bytes shall be filled with zero bytes.
------------+--------+------------+---------------------------------------------------
- 0x128 | 4 | | busnum
------------+--------+------------+---------------------------------------------------
- 0x12C | 4 | | devnum
------------+--------+------------+---------------------------------------------------
- 0x130 | 4 | | speed
------------+--------+------------+---------------------------------------------------
- 0x134 | 2 | | idVendor
------------+--------+------------+---------------------------------------------------
- 0x136 | 2 | | idProduct
------------+--------+------------+---------------------------------------------------
- 0x138 | 2 | | bcdDevice
------------+--------+------------+---------------------------------------------------
- 0x139 | 1 | | bDeviceClass
------------+--------+------------+---------------------------------------------------
- 0x13A | 1 | | bDeviceSubClass
------------+--------+------------+---------------------------------------------------
- 0x13B | 1 | | bDeviceProtocol
------------+--------+------------+---------------------------------------------------
- 0x13C | 1 | | bConfigurationValue
------------+--------+------------+---------------------------------------------------
- 0x13D | 1 | | bNumConfigurations
------------+--------+------------+---------------------------------------------------
- 0x13E | 1 | | bNumInterfaces
-
-USBIP_CMD_SUBMIT: Submit an URB
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 4 | 0x00000001 | command: Submit an URB
------------+--------+------------+---------------------------------------------------
- 4 | 4 | | seqnum: the sequence number of the URB to submit
------------+--------+------------+---------------------------------------------------
- 8 | 4 | | devid
------------+--------+------------+---------------------------------------------------
- 0xC | 4 | | direction: 0: USBIP_DIR_OUT
- | | | 1: USBIP_DIR_IN
------------+--------+------------+---------------------------------------------------
- 0x10 | 4 | | ep: endpoint number, possible values are: 0...15
------------+--------+------------+---------------------------------------------------
- 0x14 | 4 | | transfer_flags: possible values depend on the
- | | | URB transfer type, see below
------------+--------+------------+---------------------------------------------------
- 0x18 | 4 | | transfer_buffer_length
------------+--------+------------+---------------------------------------------------
- 0x1C | 4 | | start_frame: specify the selected frame to
- | | | transmit an ISO frame, ignored if URB_ISO_ASAP
- | | | is specified at transfer_flags
------------+--------+------------+---------------------------------------------------
- 0x20 | 4 | | number_of_packets: number of ISO packets
------------+--------+------------+---------------------------------------------------
- 0x24 | 4 | | interval: maximum time for the request on the
- | | | server-side host controller
------------+--------+------------+---------------------------------------------------
- 0x28 | 8 | | setup: data bytes for USB setup, filled with
- | | | zeros if not used
------------+--------+------------+---------------------------------------------------
- 0x30 | | | URB data. For ISO transfers the padding between
- | | | each ISO packets is not transmitted.
-
-
- Allowed transfer_flags | value | control | interrupt | bulk | isochronous
- -------------------------+------------+---------+-----------+----------+-------------
- URB_SHORT_NOT_OK | 0x00000001 | only in | only in | only in | no
- URB_ISO_ASAP | 0x00000002 | no | no | no | yes
- URB_NO_TRANSFER_DMA_MAP | 0x00000004 | yes | yes | yes | yes
- URB_NO_FSBR | 0x00000020 | yes | no | no | no
- URB_ZERO_PACKET | 0x00000040 | no | no | only out | no
- URB_NO_INTERRUPT | 0x00000080 | yes | yes | yes | yes
- URB_FREE_BUFFER | 0x00000100 | yes | yes | yes | yes
- URB_DIR_MASK | 0x00000200 | yes | yes | yes | yes
-
-
-USBIP_RET_SUBMIT: Reply for submitting an URB
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 4 | 0x00000003 | command
------------+--------+------------+---------------------------------------------------
- 4 | 4 | | seqnum: URB sequence number
------------+--------+------------+---------------------------------------------------
- 8 | 4 | | devid
------------+--------+------------+---------------------------------------------------
- 0xC | 4 | | direction: 0: USBIP_DIR_OUT
- | | | 1: USBIP_DIR_IN
------------+--------+------------+---------------------------------------------------
- 0x10 | 4 | | ep: endpoint number
------------+--------+------------+---------------------------------------------------
- 0x14 | 4 | | status: zero for successful URB transaction,
- | | | otherwise some kind of error happened.
------------+--------+------------+---------------------------------------------------
- 0x18 | 4 | n | actual_length: number of URB data bytes
------------+--------+------------+---------------------------------------------------
- 0x1C | 4 | | start_frame: for an ISO frame the actually
- | | | selected frame for transmit.
------------+--------+------------+---------------------------------------------------
- 0x20 | 4 | | number_of_packets
------------+--------+------------+---------------------------------------------------
- 0x24 | 4 | | error_count
------------+--------+------------+---------------------------------------------------
- 0x28 | 8 | | setup: data bytes for USB setup, filled with
- | | | zeros if not used
------------+--------+------------+---------------------------------------------------
- 0x30 | n | | URB data bytes. For ISO transfers the padding
- | | | between each ISO packets is not transmitted.
-
-USBIP_CMD_UNLINK: Unlink an URB
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 4 | 0x00000002 | command: URB unlink command
------------+--------+------------+---------------------------------------------------
- 4 | 4 | | seqnum: URB sequence number to unlink: FIXME: is this so?
------------+--------+------------+---------------------------------------------------
- 8 | 4 | | devid
------------+--------+------------+---------------------------------------------------
- 0xC | 4 | | direction: 0: USBIP_DIR_OUT
- | | | 1: USBIP_DIR_IN
------------+--------+------------+---------------------------------------------------
- 0x10 | 4 | | ep: endpoint number: zero
------------+--------+------------+---------------------------------------------------
- 0x14 | 4 | | seqnum: the URB sequence number given previously
- | | | at USBIP_CMD_SUBMIT.seqnum field
------------+--------+------------+---------------------------------------------------
- 0x30 | n | | URB data bytes. For ISO transfers the padding
- | | | between each ISO packets is not transmitted.
-
-USBIP_RET_UNLINK: Reply for URB unlink
-
- Offset | Length | Value | Description
------------+--------+------------+---------------------------------------------------
- 0 | 4 | 0x00000004 | command: reply for the URB unlink command
------------+--------+------------+---------------------------------------------------
- 4 | 4 | | seqnum: the unlinked URB sequence number
------------+--------+------------+---------------------------------------------------
- 8 | 4 | | devid
------------+--------+------------+---------------------------------------------------
- 0xC | 4 | | direction: 0: USBIP_DIR_OUT
- | | | 1: USBIP_DIR_IN
------------+--------+------------+---------------------------------------------------
- 0x10 | 4 | | ep: endpoint number
------------+--------+------------+---------------------------------------------------
- 0x14 | 4 | | status: This is the value contained in the
- | | | urb->status in the URB completition handler.
- | | | FIXME: a better explanation needed.
------------+--------+------------+---------------------------------------------------
- 0x30 | n | | URB data bytes. For ISO transfers the padding
- | | | between each ISO packets is not transmitted.
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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.
- *
- */
-
-#ifndef __USBIP_VHCI_H
-#define __USBIP_VHCI_H
-
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-#include <linux/wait.h>
-
-struct vhci_device {
- struct usb_device *udev;
-
- /*
- * devid specifies a remote usb device uniquely instead
- * of combination of busnum and devnum.
- */
- __u32 devid;
-
- /* speed of a remote device */
- enum usb_device_speed speed;
-
- /* vhci root-hub port to which this device is attached */
- __u32 rhport;
-
- struct usbip_device ud;
-
- /* lock for the below link lists */
- spinlock_t priv_lock;
-
- /* vhci_priv is linked to one of them. */
- struct list_head priv_tx;
- struct list_head priv_rx;
-
- /* vhci_unlink is linked to one of them */
- struct list_head unlink_tx;
- struct list_head unlink_rx;
-
- /* vhci_tx thread sleeps for this queue */
- wait_queue_head_t waitq_tx;
-};
-
-/* urb->hcpriv, use container_of() */
-struct vhci_priv {
- unsigned long seqnum;
- struct list_head list;
-
- struct vhci_device *vdev;
- struct urb *urb;
-};
-
-struct vhci_unlink {
- /* seqnum of this request */
- unsigned long seqnum;
-
- struct list_head list;
-
- /* seqnum of the unlink target */
- unsigned long unlink_seqnum;
-};
-
-/* Number of supported ports. Value has an upperbound of USB_MAXCHILDREN */
-#define VHCI_NPORTS 8
-
-/* for usb_bus.hcpriv */
-struct vhci_hcd {
- spinlock_t lock;
-
- u32 port_status[VHCI_NPORTS];
-
- unsigned resuming:1;
- unsigned long re_timeout;
-
- atomic_t seqnum;
-
- /*
- * NOTE:
- * wIndex shows the port number and begins from 1.
- * But, the index of this array begins from 0.
- */
- struct vhci_device vdev[VHCI_NPORTS];
-};
-
-extern struct vhci_hcd *the_controller;
-extern const struct attribute_group dev_attr_group;
-
-/* vhci_hcd.c */
-void rh_port_connect(int rhport, enum usb_device_speed speed);
-
-/* vhci_rx.c */
-struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum);
-int vhci_rx_loop(void *data);
-
-/* vhci_tx.c */
-int vhci_tx_loop(void *data);
-
-static inline struct vhci_device *port_to_vdev(__u32 port)
-{
- return &the_controller->vdev[port];
-}
-
-static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
-{
- return (struct vhci_hcd *) (hcd->hcd_priv);
-}
-
-static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
-{
- return container_of((void *) vhci, struct usb_hcd, hcd_priv);
-}
-
-static inline struct device *vhci_dev(struct vhci_hcd *vhci)
-{
- return vhci_to_hcd(vhci)->self.controller;
-}
-
-#endif /* __USBIP_VHCI_H */
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/init.h>
-#include <linux/file.h>
-#include <linux/kernel.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include "usbip_common.h"
-#include "vhci.h"
-
-#define DRIVER_AUTHOR "Takahiro Hirofuchi"
-#define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver"
-
-/*
- * TODO
- * - update root hub emulation
- * - move the emulation code to userland ?
- * porting to other operating systems
- * minimize kernel code
- * - add suspend/resume code
- * - clean up everything
- */
-
-/* See usb gadget dummy hcd */
-
-static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
-static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
- u16 wIndex, char *buff, u16 wLength);
-static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
- gfp_t mem_flags);
-static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
-static int vhci_start(struct usb_hcd *vhci_hcd);
-static void vhci_stop(struct usb_hcd *hcd);
-static int vhci_get_frame_number(struct usb_hcd *hcd);
-
-static const char driver_name[] = "vhci_hcd";
-static const char driver_desc[] = "USB/IP Virtual Host Controller";
-
-struct vhci_hcd *the_controller;
-
-static const char * const bit_desc[] = {
- "CONNECTION", /*0*/
- "ENABLE", /*1*/
- "SUSPEND", /*2*/
- "OVER_CURRENT", /*3*/
- "RESET", /*4*/
- "R5", /*5*/
- "R6", /*6*/
- "R7", /*7*/
- "POWER", /*8*/
- "LOWSPEED", /*9*/
- "HIGHSPEED", /*10*/
- "PORT_TEST", /*11*/
- "INDICATOR", /*12*/
- "R13", /*13*/
- "R14", /*14*/
- "R15", /*15*/
- "C_CONNECTION", /*16*/
- "C_ENABLE", /*17*/
- "C_SUSPEND", /*18*/
- "C_OVER_CURRENT", /*19*/
- "C_RESET", /*20*/
- "R21", /*21*/
- "R22", /*22*/
- "R23", /*23*/
- "R24", /*24*/
- "R25", /*25*/
- "R26", /*26*/
- "R27", /*27*/
- "R28", /*28*/
- "R29", /*29*/
- "R30", /*30*/
- "R31", /*31*/
-};
-
-static void dump_port_status_diff(u32 prev_status, u32 new_status)
-{
- int i = 0;
- u32 bit = 1;
-
- pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status);
- while (bit) {
- u32 prev = prev_status & bit;
- u32 new = new_status & bit;
- char change;
-
- if (!prev && new)
- change = '+';
- else if (prev && !new)
- change = '-';
- else
- change = ' ';
-
- if (prev || new)
- pr_debug(" %c%s\n", change, bit_desc[i]);
- bit <<= 1;
- i++;
- }
- pr_debug("\n");
-}
-
-void rh_port_connect(int rhport, enum usb_device_speed speed)
-{
- usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
-
- spin_lock(&the_controller->lock);
-
- the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
- | (1 << USB_PORT_FEAT_C_CONNECTION);
-
- switch (speed) {
- case USB_SPEED_HIGH:
- the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED;
- break;
- case USB_SPEED_LOW:
- the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED;
- break;
- default:
- break;
- }
-
- spin_unlock(&the_controller->lock);
-
- usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
-}
-
-static void rh_port_disconnect(int rhport)
-{
- usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
-
- spin_lock(&the_controller->lock);
-
- the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
- the_controller->port_status[rhport] |=
- (1 << USB_PORT_FEAT_C_CONNECTION);
-
- spin_unlock(&the_controller->lock);
- usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
-}
-
-#define PORT_C_MASK \
- ((USB_PORT_STAT_C_CONNECTION \
- | USB_PORT_STAT_C_ENABLE \
- | USB_PORT_STAT_C_SUSPEND \
- | USB_PORT_STAT_C_OVERCURRENT \
- | USB_PORT_STAT_C_RESET) << 16)
-
-/*
- * Returns 0 if the status hasn't changed, or the number of bytes in buf.
- * Ports are 0-indexed from the HCD point of view,
- * and 1-indexed from the USB core pointer of view.
- *
- * @buf: a bitmap to show which port status has been changed.
- * bit 0: reserved
- * bit 1: the status of port 0 has been changed.
- * bit 2: the status of port 1 has been changed.
- * ...
- */
-static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
-{
- struct vhci_hcd *vhci;
- int retval;
- int rhport;
- int changed = 0;
-
- retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8);
- memset(buf, 0, retval);
-
- vhci = hcd_to_vhci(hcd);
-
- spin_lock(&vhci->lock);
- if (!HCD_HW_ACCESSIBLE(hcd)) {
- usbip_dbg_vhci_rh("hw accessible flag not on?\n");
- goto done;
- }
-
- /* check pseudo status register for each port */
- for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
- if ((vhci->port_status[rhport] & PORT_C_MASK)) {
- /* The status of a port has been changed, */
- usbip_dbg_vhci_rh("port %d status changed\n", rhport);
-
- buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8;
- changed = 1;
- }
- }
-
- if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1))
- usb_hcd_resume_root_hub(hcd);
-
-done:
- spin_unlock(&vhci->lock);
- return changed ? retval : 0;
-}
-
-static inline void hub_descriptor(struct usb_hub_descriptor *desc)
-{
- memset(desc, 0, sizeof(*desc));
- desc->bDescriptorType = 0x29;
- desc->bDescLength = 9;
- desc->wHubCharacteristics = (__constant_cpu_to_le16(0x0001));
- desc->bNbrPorts = VHCI_NPORTS;
- desc->u.hs.DeviceRemovable[0] = 0xff;
- desc->u.hs.DeviceRemovable[1] = 0xff;
-}
-
-static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
- u16 wIndex, char *buf, u16 wLength)
-{
- struct vhci_hcd *dum;
- int retval = 0;
- int rhport;
-
- u32 prev_port_status[VHCI_NPORTS];
-
- if (!HCD_HW_ACCESSIBLE(hcd))
- return -ETIMEDOUT;
-
- /*
- * NOTE:
- * wIndex shows the port number and begins from 1.
- */
- usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
- wIndex);
- if (wIndex > VHCI_NPORTS)
- pr_err("invalid port number %d\n", wIndex);
- rhport = ((__u8)(wIndex & 0x00ff)) - 1;
-
- dum = hcd_to_vhci(hcd);
-
- spin_lock(&dum->lock);
-
- /* store old status and compare now and old later */
- if (usbip_dbg_flag_vhci_rh) {
- memcpy(prev_port_status, dum->port_status,
- sizeof(prev_port_status));
- }
-
- switch (typeReq) {
- case ClearHubFeature:
- usbip_dbg_vhci_rh(" ClearHubFeature\n");
- break;
- case ClearPortFeature:
- switch (wValue) {
- case USB_PORT_FEAT_SUSPEND:
- if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
- /* 20msec signaling */
- dum->resuming = 1;
- dum->re_timeout =
- jiffies + msecs_to_jiffies(20);
- }
- break;
- case USB_PORT_FEAT_POWER:
- usbip_dbg_vhci_rh(
- " ClearPortFeature: USB_PORT_FEAT_POWER\n");
- dum->port_status[rhport] = 0;
- dum->resuming = 0;
- break;
- case USB_PORT_FEAT_C_RESET:
- usbip_dbg_vhci_rh(
- " ClearPortFeature: USB_PORT_FEAT_C_RESET\n");
- switch (dum->vdev[rhport].speed) {
- case USB_SPEED_HIGH:
- dum->port_status[rhport] |=
- USB_PORT_STAT_HIGH_SPEED;
- break;
- case USB_SPEED_LOW:
- dum->port_status[rhport] |=
- USB_PORT_STAT_LOW_SPEED;
- break;
- default:
- break;
- }
- default:
- usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
- wValue);
- dum->port_status[rhport] &= ~(1 << wValue);
- break;
- }
- break;
- case GetHubDescriptor:
- usbip_dbg_vhci_rh(" GetHubDescriptor\n");
- hub_descriptor((struct usb_hub_descriptor *) buf);
- break;
- case GetHubStatus:
- usbip_dbg_vhci_rh(" GetHubStatus\n");
- *(__le32 *) buf = cpu_to_le32(0);
- break;
- case GetPortStatus:
- usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
- if (wIndex > VHCI_NPORTS || wIndex < 1) {
- pr_err("invalid port number %d\n", wIndex);
- retval = -EPIPE;
- }
-
- /* we do not care about resume. */
-
- /* whoever resets or resumes must GetPortStatus to
- * complete it!!
- */
- if (dum->resuming && time_after(jiffies, dum->re_timeout)) {
- dum->port_status[rhport] |=
- (1 << USB_PORT_FEAT_C_SUSPEND);
- dum->port_status[rhport] &=
- ~(1 << USB_PORT_FEAT_SUSPEND);
- dum->resuming = 0;
- dum->re_timeout = 0;
- }
-
- if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
- 0 && time_after(jiffies, dum->re_timeout)) {
- dum->port_status[rhport] |=
- (1 << USB_PORT_FEAT_C_RESET);
- dum->port_status[rhport] &=
- ~(1 << USB_PORT_FEAT_RESET);
- dum->re_timeout = 0;
-
- if (dum->vdev[rhport].ud.status ==
- VDEV_ST_NOTASSIGNED) {
- usbip_dbg_vhci_rh(
- " enable rhport %d (status %u)\n",
- rhport,
- dum->vdev[rhport].ud.status);
- dum->port_status[rhport] |=
- USB_PORT_STAT_ENABLE;
- }
- }
- ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]);
- ((__le16 *) buf)[1] =
- cpu_to_le16(dum->port_status[rhport] >> 16);
-
- usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
- ((u16 *)buf)[1]);
- break;
- case SetHubFeature:
- usbip_dbg_vhci_rh(" SetHubFeature\n");
- retval = -EPIPE;
- break;
- case SetPortFeature:
- switch (wValue) {
- case USB_PORT_FEAT_SUSPEND:
- usbip_dbg_vhci_rh(
- " SetPortFeature: USB_PORT_FEAT_SUSPEND\n");
- break;
- case USB_PORT_FEAT_RESET:
- usbip_dbg_vhci_rh(
- " SetPortFeature: USB_PORT_FEAT_RESET\n");
- /* if it's already running, disconnect first */
- if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) {
- dum->port_status[rhport] &=
- ~(USB_PORT_STAT_ENABLE |
- USB_PORT_STAT_LOW_SPEED |
- USB_PORT_STAT_HIGH_SPEED);
- /* FIXME test that code path! */
- }
- /* 50msec reset signaling */
- dum->re_timeout = jiffies + msecs_to_jiffies(50);
-
- /* FALLTHROUGH */
- default:
- usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
- wValue);
- dum->port_status[rhport] |= (1 << wValue);
- break;
- }
- break;
-
- default:
- pr_err("default: no such request\n");
-
- /* "protocol stall" on error */
- retval = -EPIPE;
- }
-
- if (usbip_dbg_flag_vhci_rh) {
- pr_debug("port %d\n", rhport);
- /* Only dump valid port status */
- if (rhport >= 0) {
- dump_port_status_diff(prev_port_status[rhport],
- dum->port_status[rhport]);
- }
- }
- usbip_dbg_vhci_rh(" bye\n");
-
- spin_unlock(&dum->lock);
-
- return retval;
-}
-
-static struct vhci_device *get_vdev(struct usb_device *udev)
-{
- int i;
-
- if (!udev)
- return NULL;
-
- for (i = 0; i < VHCI_NPORTS; i++)
- if (the_controller->vdev[i].udev == udev)
- return port_to_vdev(i);
-
- return NULL;
-}
-
-static void vhci_tx_urb(struct urb *urb)
-{
- struct vhci_device *vdev = get_vdev(urb->dev);
- struct vhci_priv *priv;
-
- if (!vdev) {
- pr_err("could not get virtual device");
- return;
- }
-
- priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
- if (!priv) {
- usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
- return;
- }
-
- spin_lock(&vdev->priv_lock);
-
- priv->seqnum = atomic_inc_return(&the_controller->seqnum);
- if (priv->seqnum == 0xffff)
- dev_info(&urb->dev->dev, "seqnum max\n");
-
- priv->vdev = vdev;
- priv->urb = urb;
-
- urb->hcpriv = (void *) priv;
-
- list_add_tail(&priv->list, &vdev->priv_tx);
-
- wake_up(&vdev->waitq_tx);
- spin_unlock(&vdev->priv_lock);
-}
-
-static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
- gfp_t mem_flags)
-{
- struct device *dev = &urb->dev->dev;
- int ret = 0;
- struct vhci_device *vdev;
-
- usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
- hcd, urb, mem_flags);
-
- /* patch to usb_sg_init() is in 2.5.60 */
- BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
-
- spin_lock(&the_controller->lock);
-
- if (urb->status != -EINPROGRESS) {
- dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
- spin_unlock(&the_controller->lock);
- return urb->status;
- }
-
- vdev = port_to_vdev(urb->dev->portnum-1);
-
- /* refuse enqueue for dead connection */
- spin_lock(&vdev->ud.lock);
- if (vdev->ud.status == VDEV_ST_NULL ||
- vdev->ud.status == VDEV_ST_ERROR) {
- dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
- spin_unlock(&vdev->ud.lock);
- spin_unlock(&the_controller->lock);
- return -ENODEV;
- }
- spin_unlock(&vdev->ud.lock);
-
- ret = usb_hcd_link_urb_to_ep(hcd, urb);
- if (ret)
- goto no_need_unlink;
-
- /*
- * The enumeration process is as follows;
- *
- * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
- * to get max packet length of default pipe
- *
- * 2. Set_Address request to DevAddr(0) EndPoint(0)
- *
- */
- if (usb_pipedevice(urb->pipe) == 0) {
- __u8 type = usb_pipetype(urb->pipe);
- struct usb_ctrlrequest *ctrlreq =
- (struct usb_ctrlrequest *) urb->setup_packet;
-
- if (type != PIPE_CONTROL || !ctrlreq) {
- dev_err(dev, "invalid request to devnum 0\n");
- ret = -EINVAL;
- goto no_need_xmit;
- }
-
- switch (ctrlreq->bRequest) {
- case USB_REQ_SET_ADDRESS:
- /* set_address may come when a device is reset */
- dev_info(dev, "SetAddress Request (%d) to port %d\n",
- ctrlreq->wValue, vdev->rhport);
-
- if (vdev->udev)
- usb_put_dev(vdev->udev);
- vdev->udev = usb_get_dev(urb->dev);
-
- spin_lock(&vdev->ud.lock);
- vdev->ud.status = VDEV_ST_USED;
- spin_unlock(&vdev->ud.lock);
-
- if (urb->status == -EINPROGRESS) {
- /* This request is successfully completed. */
- /* If not -EINPROGRESS, possibly unlinked. */
- urb->status = 0;
- }
-
- goto no_need_xmit;
-
- case USB_REQ_GET_DESCRIPTOR:
- if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8))
- usbip_dbg_vhci_hc(
- "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n");
-
- if (vdev->udev)
- usb_put_dev(vdev->udev);
- vdev->udev = usb_get_dev(urb->dev);
- goto out;
-
- default:
- /* NOT REACHED */
- dev_err(dev,
- "invalid request to devnum 0 bRequest %u, wValue %u\n",
- ctrlreq->bRequest,
- ctrlreq->wValue);
- ret = -EINVAL;
- goto no_need_xmit;
- }
-
- }
-
-out:
- vhci_tx_urb(urb);
- spin_unlock(&the_controller->lock);
-
- return 0;
-
-no_need_xmit:
- usb_hcd_unlink_urb_from_ep(hcd, urb);
-no_need_unlink:
- spin_unlock(&the_controller->lock);
- usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
- return ret;
-}
-
-/*
- * vhci_rx gives back the urb after receiving the reply of the urb. If an
- * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
- * back its urb. For the driver unlinking the urb, the content of the urb is
- * not important, but the calling to its completion handler is important; the
- * completion of unlinking is notified by the completion handler.
- *
- *
- * CLIENT SIDE
- *
- * - When vhci_hcd receives RET_SUBMIT,
- *
- * - case 1a). the urb of the pdu is not unlinking.
- * - normal case
- * => just give back the urb
- *
- * - case 1b). the urb of the pdu is unlinking.
- * - usbip.ko will return a reply of the unlinking request.
- * => give back the urb now and go to case 2b).
- *
- * - When vhci_hcd receives RET_UNLINK,
- *
- * - case 2a). a submit request is still pending in vhci_hcd.
- * - urb was really pending in usbip.ko and urb_unlink_urb() was
- * completed there.
- * => free a pending submit request
- * => notify unlink completeness by giving back the urb
- *
- * - case 2b). a submit request is *not* pending in vhci_hcd.
- * - urb was already given back to the core driver.
- * => do not give back the urb
- *
- *
- * SERVER SIDE
- *
- * - When usbip receives CMD_UNLINK,
- *
- * - case 3a). the urb of the unlink request is now in submission.
- * => do usb_unlink_urb().
- * => after the unlink is completed, send RET_UNLINK.
- *
- * - case 3b). the urb of the unlink request is not in submission.
- * - may be already completed or never be received
- * => send RET_UNLINK
- *
- */
-static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
-{
- struct vhci_priv *priv;
- struct vhci_device *vdev;
-
- pr_info("dequeue a urb %p\n", urb);
-
- spin_lock(&the_controller->lock);
-
- priv = urb->hcpriv;
- if (!priv) {
- /* URB was never linked! or will be soon given back by
- * vhci_rx. */
- spin_unlock(&the_controller->lock);
- return 0;
- }
-
- {
- int ret = 0;
-
- ret = usb_hcd_check_unlink_urb(hcd, urb, status);
- if (ret) {
- spin_unlock(&the_controller->lock);
- return ret;
- }
- }
-
- /* send unlink request here? */
- vdev = priv->vdev;
-
- if (!vdev->ud.tcp_socket) {
- /* tcp connection is closed */
- spin_lock(&vdev->priv_lock);
-
- pr_info("device %p seems to be disconnected\n", vdev);
- list_del(&priv->list);
- kfree(priv);
- urb->hcpriv = NULL;
-
- spin_unlock(&vdev->priv_lock);
-
- /*
- * If tcp connection is alive, we have sent CMD_UNLINK.
- * vhci_rx will receive RET_UNLINK and give back the URB.
- * Otherwise, we give back it here.
- */
- pr_info("gives back urb %p\n", urb);
-
- usb_hcd_unlink_urb_from_ep(hcd, urb);
-
- spin_unlock(&the_controller->lock);
- usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
- urb->status);
- spin_lock(&the_controller->lock);
-
- } else {
- /* tcp connection is alive */
- struct vhci_unlink *unlink;
-
- spin_lock(&vdev->priv_lock);
-
- /* setup CMD_UNLINK pdu */
- unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
- if (!unlink) {
- spin_unlock(&vdev->priv_lock);
- spin_unlock(&the_controller->lock);
- usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
- return -ENOMEM;
- }
-
- unlink->seqnum = atomic_inc_return(&the_controller->seqnum);
- if (unlink->seqnum == 0xffff)
- pr_info("seqnum max\n");
-
- unlink->unlink_seqnum = priv->seqnum;
-
- pr_info("device %p seems to be still connected\n", vdev);
-
- /* send cmd_unlink and try to cancel the pending URB in the
- * peer */
- list_add_tail(&unlink->list, &vdev->unlink_tx);
- wake_up(&vdev->waitq_tx);
-
- spin_unlock(&vdev->priv_lock);
- }
-
- spin_unlock(&the_controller->lock);
-
- usbip_dbg_vhci_hc("leave\n");
- return 0;
-}
-
-static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
-{
- struct vhci_unlink *unlink, *tmp;
-
- spin_lock(&the_controller->lock);
- spin_lock(&vdev->priv_lock);
-
- list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
- pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
- list_del(&unlink->list);
- kfree(unlink);
- }
-
- while (!list_empty(&vdev->unlink_rx)) {
- struct urb *urb;
-
- unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
- list);
-
- /* give back URB of unanswered unlink request */
- pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
-
- urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
- if (!urb) {
- pr_info("the urb (seqnum %lu) was already given back\n",
- unlink->unlink_seqnum);
- list_del(&unlink->list);
- kfree(unlink);
- continue;
- }
-
- urb->status = -ENODEV;
-
- usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
-
- list_del(&unlink->list);
-
- spin_unlock(&vdev->priv_lock);
- spin_unlock(&the_controller->lock);
-
- usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
- urb->status);
-
- spin_lock(&the_controller->lock);
- spin_lock(&vdev->priv_lock);
-
- kfree(unlink);
- }
-
- spin_unlock(&vdev->priv_lock);
- spin_unlock(&the_controller->lock);
-}
-
-/*
- * The important thing is that only one context begins cleanup.
- * This is why error handling and cleanup become simple.
- * We do not want to consider race condition as possible.
- */
-static void vhci_shutdown_connection(struct usbip_device *ud)
-{
- struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
-
- /* need this? see stub_dev.c */
- if (ud->tcp_socket) {
- pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
- kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
- }
-
- /* kill threads related to this sdev */
- if (vdev->ud.tcp_rx) {
- kthread_stop_put(vdev->ud.tcp_rx);
- vdev->ud.tcp_rx = NULL;
- }
- if (vdev->ud.tcp_tx) {
- kthread_stop_put(vdev->ud.tcp_tx);
- vdev->ud.tcp_tx = NULL;
- }
- pr_info("stop threads\n");
-
- /* active connection is closed */
- if (vdev->ud.tcp_socket) {
- sockfd_put(vdev->ud.tcp_socket);
- vdev->ud.tcp_socket = NULL;
- }
- pr_info("release socket\n");
-
- vhci_device_unlink_cleanup(vdev);
-
- /*
- * rh_port_disconnect() is a trigger of ...
- * usb_disable_device():
- * disable all the endpoints for a USB device.
- * usb_disable_endpoint():
- * disable endpoints. pending urbs are unlinked(dequeued).
- *
- * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
- * detached device should release used urbs in a cleanup function (i.e.
- * xxx_disconnect()). Therefore, vhci_hcd does not need to release
- * pushed urbs and their private data in this function.
- *
- * NOTE: vhci_dequeue() must be considered carefully. When shutting down
- * a connection, vhci_shutdown_connection() expects vhci_dequeue()
- * gives back pushed urbs and frees their private data by request of
- * the cleanup function of a USB driver. When unlinking a urb with an
- * active connection, vhci_dequeue() does not give back the urb which
- * is actually given back by vhci_rx after receiving its return pdu.
- *
- */
- rh_port_disconnect(vdev->rhport);
-
- pr_info("disconnect device\n");
-}
-
-
-static void vhci_device_reset(struct usbip_device *ud)
-{
- struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
-
- spin_lock(&ud->lock);
-
- vdev->speed = 0;
- vdev->devid = 0;
-
- if (vdev->udev)
- usb_put_dev(vdev->udev);
- vdev->udev = NULL;
-
- if (ud->tcp_socket) {
- sockfd_put(ud->tcp_socket);
- ud->tcp_socket = NULL;
- }
- ud->status = VDEV_ST_NULL;
-
- spin_unlock(&ud->lock);
-}
-
-static void vhci_device_unusable(struct usbip_device *ud)
-{
- spin_lock(&ud->lock);
- ud->status = VDEV_ST_ERROR;
- spin_unlock(&ud->lock);
-}
-
-static void vhci_device_init(struct vhci_device *vdev)
-{
- memset(vdev, 0, sizeof(*vdev));
-
- vdev->ud.side = USBIP_VHCI;
- vdev->ud.status = VDEV_ST_NULL;
- spin_lock_init(&vdev->ud.lock);
-
- INIT_LIST_HEAD(&vdev->priv_rx);
- INIT_LIST_HEAD(&vdev->priv_tx);
- INIT_LIST_HEAD(&vdev->unlink_tx);
- INIT_LIST_HEAD(&vdev->unlink_rx);
- spin_lock_init(&vdev->priv_lock);
-
- init_waitqueue_head(&vdev->waitq_tx);
-
- vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
- vdev->ud.eh_ops.reset = vhci_device_reset;
- vdev->ud.eh_ops.unusable = vhci_device_unusable;
-
- usbip_start_eh(&vdev->ud);
-}
-
-static int vhci_start(struct usb_hcd *hcd)
-{
- struct vhci_hcd *vhci = hcd_to_vhci(hcd);
- int rhport;
- int err = 0;
-
- usbip_dbg_vhci_hc("enter vhci_start\n");
-
- /* initialize private data of usb_hcd */
-
- for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
- struct vhci_device *vdev = &vhci->vdev[rhport];
-
- vhci_device_init(vdev);
- vdev->rhport = rhport;
- }
-
- atomic_set(&vhci->seqnum, 0);
- spin_lock_init(&vhci->lock);
-
- hcd->power_budget = 0; /* no limit */
- hcd->uses_new_polling = 1;
-
- /* vhci_hcd is now ready to be controlled through sysfs */
- err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
- if (err) {
- pr_err("create sysfs files\n");
- return err;
- }
-
- return 0;
-}
-
-static void vhci_stop(struct usb_hcd *hcd)
-{
- struct vhci_hcd *vhci = hcd_to_vhci(hcd);
- int rhport = 0;
-
- usbip_dbg_vhci_hc("stop VHCI controller\n");
-
- /* 1. remove the userland interface of vhci_hcd */
- sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
-
- /* 2. shutdown all the ports of vhci_hcd */
- for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
- struct vhci_device *vdev = &vhci->vdev[rhport];
-
- usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
- usbip_stop_eh(&vdev->ud);
- }
-}
-
-static int vhci_get_frame_number(struct usb_hcd *hcd)
-{
- pr_err("Not yet implemented\n");
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-/* FIXME: suspend/resume */
-static int vhci_bus_suspend(struct usb_hcd *hcd)
-{
- struct vhci_hcd *vhci = hcd_to_vhci(hcd);
-
- dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
-
- spin_lock(&vhci->lock);
- hcd->state = HC_STATE_SUSPENDED;
- spin_unlock(&vhci->lock);
-
- return 0;
-}
-
-static int vhci_bus_resume(struct usb_hcd *hcd)
-{
- struct vhci_hcd *vhci = hcd_to_vhci(hcd);
- int rc = 0;
-
- dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
-
- spin_lock(&vhci->lock);
- if (!HCD_HW_ACCESSIBLE(hcd))
- rc = -ESHUTDOWN;
- else
- hcd->state = HC_STATE_RUNNING;
- spin_unlock(&vhci->lock);
-
- return rc;
-}
-
-#else
-
-#define vhci_bus_suspend NULL
-#define vhci_bus_resume NULL
-#endif
-
-static struct hc_driver vhci_hc_driver = {
- .description = driver_name,
- .product_desc = driver_desc,
- .hcd_priv_size = sizeof(struct vhci_hcd),
-
- .flags = HCD_USB2,
-
- .start = vhci_start,
- .stop = vhci_stop,
-
- .urb_enqueue = vhci_urb_enqueue,
- .urb_dequeue = vhci_urb_dequeue,
-
- .get_frame_number = vhci_get_frame_number,
-
- .hub_status_data = vhci_hub_status,
- .hub_control = vhci_hub_control,
- .bus_suspend = vhci_bus_suspend,
- .bus_resume = vhci_bus_resume,
-};
-
-static int vhci_hcd_probe(struct platform_device *pdev)
-{
- struct usb_hcd *hcd;
- int ret;
-
- usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
-
- /*
- * Allocate and initialize hcd.
- * Our private data is also allocated automatically.
- */
- hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev));
- if (!hcd) {
- pr_err("create hcd failed\n");
- return -ENOMEM;
- }
- hcd->has_tt = 1;
-
- /* this is private data for vhci_hcd */
- the_controller = hcd_to_vhci(hcd);
-
- /*
- * Finish generic HCD structure initialization and register.
- * Call the driver's reset() and start() routines.
- */
- ret = usb_add_hcd(hcd, 0, 0);
- if (ret != 0) {
- pr_err("usb_add_hcd failed %d\n", ret);
- usb_put_hcd(hcd);
- the_controller = NULL;
- return ret;
- }
-
- usbip_dbg_vhci_hc("bye\n");
- return 0;
-}
-
-static int vhci_hcd_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd;
-
- hcd = platform_get_drvdata(pdev);
- if (!hcd)
- return 0;
-
- /*
- * Disconnects the root hub,
- * then reverses the effects of usb_add_hcd(),
- * invoking the HCD's stop() methods.
- */
- usb_remove_hcd(hcd);
- usb_put_hcd(hcd);
- the_controller = NULL;
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-/* what should happen for USB/IP under suspend/resume? */
-static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct usb_hcd *hcd;
- int rhport = 0;
- int connected = 0;
- int ret = 0;
-
- hcd = platform_get_drvdata(pdev);
-
- spin_lock(&the_controller->lock);
-
- for (rhport = 0; rhport < VHCI_NPORTS; rhport++)
- if (the_controller->port_status[rhport] &
- USB_PORT_STAT_CONNECTION)
- connected += 1;
-
- spin_unlock(&the_controller->lock);
-
- if (connected > 0) {
- dev_info(&pdev->dev,
- "We have %d active connection%s. Do not suspend.\n",
- connected, (connected == 1 ? "" : "s"));
- ret = -EBUSY;
- } else {
- dev_info(&pdev->dev, "suspend vhci_hcd");
- clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
- }
-
- return ret;
-}
-
-static int vhci_hcd_resume(struct platform_device *pdev)
-{
- struct usb_hcd *hcd;
-
- dev_dbg(&pdev->dev, "%s\n", __func__);
-
- hcd = platform_get_drvdata(pdev);
- set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
- usb_hcd_poll_rh_status(hcd);
-
- return 0;
-}
-
-#else
-
-#define vhci_hcd_suspend NULL
-#define vhci_hcd_resume NULL
-
-#endif
-
-static struct platform_driver vhci_driver = {
- .probe = vhci_hcd_probe,
- .remove = vhci_hcd_remove,
- .suspend = vhci_hcd_suspend,
- .resume = vhci_hcd_resume,
- .driver = {
- .name = driver_name,
- .owner = THIS_MODULE,
- },
-};
-
-/*
- * The VHCI 'device' is 'virtual'; not a real plug&play hardware.
- * We need to add this virtual device as a platform device arbitrarily:
- * 1. platform_device_register()
- */
-static void the_pdev_release(struct device *dev)
-{
-}
-
-static struct platform_device the_pdev = {
- /* should be the same name as driver_name */
- .name = driver_name,
- .id = -1,
- .dev = {
- .release = the_pdev_release,
- },
-};
-
-static int __init vhci_hcd_init(void)
-{
- int ret;
-
- if (usb_disabled())
- return -ENODEV;
-
- ret = platform_driver_register(&vhci_driver);
- if (ret)
- goto err_driver_register;
-
- ret = platform_device_register(&the_pdev);
- if (ret)
- goto err_platform_device_register;
-
- pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
- return ret;
-
-err_platform_device_register:
- platform_driver_unregister(&vhci_driver);
-err_driver_register:
- return ret;
-}
-
-static void __exit vhci_hcd_exit(void)
-{
- platform_device_unregister(&the_pdev);
- platform_driver_unregister(&vhci_driver);
-}
-
-module_init(vhci_hcd_init);
-module_exit(vhci_hcd_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_VERSION(USBIP_VERSION);
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/slab.h>
-
-#include "usbip_common.h"
-#include "vhci.h"
-
-/* get URB from transmitted urb queue. caller must hold vdev->priv_lock */
-struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum)
-{
- struct vhci_priv *priv, *tmp;
- struct urb *urb = NULL;
- int status;
-
- list_for_each_entry_safe(priv, tmp, &vdev->priv_rx, list) {
- if (priv->seqnum != seqnum)
- continue;
-
- urb = priv->urb;
- status = urb->status;
-
- usbip_dbg_vhci_rx("find urb %p vurb %p seqnum %u\n",
- urb, priv, seqnum);
-
- switch (status) {
- case -ENOENT:
- /* fall through */
- case -ECONNRESET:
- dev_info(&urb->dev->dev,
- "urb %p was unlinked %ssynchronuously.\n", urb,
- status == -ENOENT ? "" : "a");
- break;
- case -EINPROGRESS:
- /* no info output */
- break;
- default:
- dev_info(&urb->dev->dev,
- "urb %p may be in a error, status %d\n", urb,
- status);
- }
-
- list_del(&priv->list);
- kfree(priv);
- urb->hcpriv = NULL;
-
- break;
- }
-
- return urb;
-}
-
-static void vhci_recv_ret_submit(struct vhci_device *vdev,
- struct usbip_header *pdu)
-{
- struct usbip_device *ud = &vdev->ud;
- struct urb *urb;
-
- spin_lock(&vdev->priv_lock);
- urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
- spin_unlock(&vdev->priv_lock);
-
- if (!urb) {
- pr_err("cannot find a urb of seqnum %u\n", pdu->base.seqnum);
- pr_info("max seqnum %d\n",
- atomic_read(&the_controller->seqnum));
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
- return;
- }
-
- /* unpack the pdu to a urb */
- usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0);
-
- /* recv transfer buffer */
- if (usbip_recv_xbuff(ud, urb) < 0)
- return;
-
- /* recv iso_packet_descriptor */
- if (usbip_recv_iso(ud, urb) < 0)
- return;
-
- /* restore the padding in iso packets */
- usbip_pad_iso(ud, urb);
-
- if (usbip_dbg_flag_vhci_rx)
- usbip_dump_urb(urb);
-
- usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
-
- spin_lock(&the_controller->lock);
- usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
- spin_unlock(&the_controller->lock);
-
- usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
-
- usbip_dbg_vhci_rx("Leave\n");
-}
-
-static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
- struct usbip_header *pdu)
-{
- struct vhci_unlink *unlink, *tmp;
-
- spin_lock(&vdev->priv_lock);
-
- list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
- pr_info("unlink->seqnum %lu\n", unlink->seqnum);
- if (unlink->seqnum == pdu->base.seqnum) {
- usbip_dbg_vhci_rx("found pending unlink, %lu\n",
- unlink->seqnum);
- list_del(&unlink->list);
-
- spin_unlock(&vdev->priv_lock);
- return unlink;
- }
- }
-
- spin_unlock(&vdev->priv_lock);
-
- return NULL;
-}
-
-static void vhci_recv_ret_unlink(struct vhci_device *vdev,
- struct usbip_header *pdu)
-{
- struct vhci_unlink *unlink;
- struct urb *urb;
-
- usbip_dump_header(pdu);
-
- unlink = dequeue_pending_unlink(vdev, pdu);
- if (!unlink) {
- pr_info("cannot find the pending unlink %u\n",
- pdu->base.seqnum);
- return;
- }
-
- spin_lock(&vdev->priv_lock);
- urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
- spin_unlock(&vdev->priv_lock);
-
- if (!urb) {
- /*
- * I get the result of a unlink request. But, it seems that I
- * already received the result of its submit result and gave
- * back the URB.
- */
- pr_info("the urb (seqnum %d) was already given back\n",
- pdu->base.seqnum);
- } else {
- usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
-
- /* If unlink is successful, status is -ECONNRESET */
- urb->status = pdu->u.ret_unlink.status;
- pr_info("urb->status %d\n", urb->status);
-
- spin_lock(&the_controller->lock);
- usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
- spin_unlock(&the_controller->lock);
-
- usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
- urb->status);
- }
-
- kfree(unlink);
-}
-
-static int vhci_priv_tx_empty(struct vhci_device *vdev)
-{
- int empty = 0;
-
- spin_lock(&vdev->priv_lock);
- empty = list_empty(&vdev->priv_rx);
- spin_unlock(&vdev->priv_lock);
-
- return empty;
-}
-
-/* recv a pdu */
-static void vhci_rx_pdu(struct usbip_device *ud)
-{
- int ret;
- struct usbip_header pdu;
- struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
-
- usbip_dbg_vhci_rx("Enter\n");
-
- memset(&pdu, 0, sizeof(pdu));
-
- /* receive a pdu header */
- ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
- if (ret < 0) {
- if (ret == -ECONNRESET)
- pr_info("connection reset by peer\n");
- else if (ret == -EAGAIN) {
- /* ignore if connection was idle */
- if (vhci_priv_tx_empty(vdev))
- return;
- pr_info("connection timed out with pending urbs\n");
- } else if (ret != -ERESTARTSYS)
- pr_info("xmit failed %d\n", ret);
-
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
- return;
- }
- if (ret == 0) {
- pr_info("connection closed");
- usbip_event_add(ud, VDEV_EVENT_DOWN);
- return;
- }
- if (ret != sizeof(pdu)) {
- pr_err("received pdu size is %d, should be %d\n", ret,
- (unsigned int)sizeof(pdu));
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
- return;
- }
-
- usbip_header_correct_endian(&pdu, 0);
-
- if (usbip_dbg_flag_vhci_rx)
- usbip_dump_header(&pdu);
-
- switch (pdu.base.command) {
- case USBIP_RET_SUBMIT:
- vhci_recv_ret_submit(vdev, &pdu);
- break;
- case USBIP_RET_UNLINK:
- vhci_recv_ret_unlink(vdev, &pdu);
- break;
- default:
- /* NOT REACHED */
- pr_err("unknown pdu %u\n", pdu.base.command);
- usbip_dump_header(&pdu);
- usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
- break;
- }
-}
-
-int vhci_rx_loop(void *data)
-{
- struct usbip_device *ud = data;
-
- while (!kthread_should_stop()) {
- if (usbip_event_happened(ud))
- break;
-
- vhci_rx_pdu(ud);
- }
-
- return 0;
-}
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/file.h>
-#include <linux/net.h>
-
-#include "usbip_common.h"
-#include "vhci.h"
-
-/* TODO: refine locking ?*/
-
-/* Sysfs entry to show port status */
-static ssize_t status_show(struct device *dev, struct device_attribute *attr,
- char *out)
-{
- char *s = out;
- int i = 0;
-
- BUG_ON(!the_controller || !out);
-
- spin_lock(&the_controller->lock);
-
- /*
- * output example:
- * prt sta spd dev socket local_busid
- * 000 004 000 000 c5a7bb80 1-2.3
- * 001 004 000 000 d8cee980 2-3.4
- *
- * IP address can be retrieved from a socket pointer address by looking
- * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
- * port number and its peer IP address.
- */
- out += sprintf(out,
- "prt sta spd bus dev socket local_busid\n");
-
- for (i = 0; i < VHCI_NPORTS; i++) {
- struct vhci_device *vdev = port_to_vdev(i);
-
- spin_lock(&vdev->ud.lock);
- out += sprintf(out, "%03u %03u ", i, vdev->ud.status);
-
- if (vdev->ud.status == VDEV_ST_USED) {
- out += sprintf(out, "%03u %08x ",
- vdev->speed, vdev->devid);
- out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
- out += sprintf(out, "%s", dev_name(&vdev->udev->dev));
-
- } else {
- out += sprintf(out, "000 000 000 0000000000000000 0-0");
- }
-
- out += sprintf(out, "\n");
- spin_unlock(&vdev->ud.lock);
- }
-
- spin_unlock(&the_controller->lock);
-
- return out - s;
-}
-static DEVICE_ATTR_RO(status);
-
-/* Sysfs entry to shutdown a virtual connection */
-static int vhci_port_disconnect(__u32 rhport)
-{
- struct vhci_device *vdev;
-
- usbip_dbg_vhci_sysfs("enter\n");
-
- /* lock */
- spin_lock(&the_controller->lock);
-
- vdev = port_to_vdev(rhport);
-
- spin_lock(&vdev->ud.lock);
- if (vdev->ud.status == VDEV_ST_NULL) {
- pr_err("not connected %d\n", vdev->ud.status);
-
- /* unlock */
- spin_unlock(&vdev->ud.lock);
- spin_unlock(&the_controller->lock);
-
- return -EINVAL;
- }
-
- /* unlock */
- spin_unlock(&vdev->ud.lock);
- spin_unlock(&the_controller->lock);
-
- usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
-
- return 0;
-}
-
-static ssize_t store_detach(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- int err;
- __u32 rhport = 0;
-
- if (sscanf(buf, "%u", &rhport) != 1)
- return -EINVAL;
-
- /* check rhport */
- if (rhport >= VHCI_NPORTS) {
- dev_err(dev, "invalid port %u\n", rhport);
- return -EINVAL;
- }
-
- err = vhci_port_disconnect(rhport);
- if (err < 0)
- return -EINVAL;
-
- usbip_dbg_vhci_sysfs("Leave\n");
-
- return count;
-}
-static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach);
-
-/* Sysfs entry to establish a virtual connection */
-static int valid_args(__u32 rhport, enum usb_device_speed speed)
-{
- /* check rhport */
- if (rhport >= VHCI_NPORTS) {
- pr_err("port %u\n", rhport);
- return -EINVAL;
- }
-
- /* check speed */
- switch (speed) {
- case USB_SPEED_LOW:
- case USB_SPEED_FULL:
- case USB_SPEED_HIGH:
- case USB_SPEED_WIRELESS:
- break;
- default:
- pr_err("Failed attach request for unsupported USB speed: %s\n",
- usb_speed_string(speed));
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * To start a new USB/IP attachment, a userland program needs to setup a TCP
- * connection and then write its socket descriptor with remote device
- * information into this sysfs file.
- *
- * A remote device is virtually attached to the root-hub port of @rhport with
- * @speed. @devid is embedded into a request to specify the remote device in a
- * server host.
- *
- * write() returns 0 on success, else negative errno.
- */
-static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct vhci_device *vdev;
- struct socket *socket;
- int sockfd = 0;
- __u32 rhport = 0, devid = 0, speed = 0;
- int err;
-
- /*
- * @rhport: port number of vhci_hcd
- * @sockfd: socket descriptor of an established TCP connection
- * @devid: unique device identifier in a remote host
- * @speed: usb device speed in a remote host
- */
- if (sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed) != 4)
- return -EINVAL;
-
- usbip_dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
- rhport, sockfd, devid, speed);
-
- /* check received parameters */
- if (valid_args(rhport, speed) < 0)
- return -EINVAL;
-
- /* Extract socket from fd. */
- socket = sockfd_lookup(sockfd, &err);
- if (!socket)
- return -EINVAL;
-
- /* now need lock until setting vdev status as used */
-
- /* begin a lock */
- spin_lock(&the_controller->lock);
- vdev = port_to_vdev(rhport);
- spin_lock(&vdev->ud.lock);
-
- if (vdev->ud.status != VDEV_ST_NULL) {
- /* end of the lock */
- spin_unlock(&vdev->ud.lock);
- spin_unlock(&the_controller->lock);
-
- sockfd_put(socket);
-
- dev_err(dev, "port %d already used\n", rhport);
- return -EINVAL;
- }
-
- dev_info(dev,
- "rhport(%u) sockfd(%d) devid(%u) speed(%u) speed_str(%s)\n",
- rhport, sockfd, devid, speed, usb_speed_string(speed));
-
- vdev->devid = devid;
- vdev->speed = speed;
- vdev->ud.tcp_socket = socket;
- vdev->ud.status = VDEV_ST_NOTASSIGNED;
-
- spin_unlock(&vdev->ud.lock);
- spin_unlock(&the_controller->lock);
- /* end the lock */
-
- vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
- vdev->ud.tcp_tx = kthread_get_run(vhci_tx_loop, &vdev->ud, "vhci_tx");
-
- rh_port_connect(rhport, speed);
-
- return count;
-}
-static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach);
-
-static struct attribute *dev_attrs[] = {
- &dev_attr_status.attr,
- &dev_attr_detach.attr,
- &dev_attr_attach.attr,
- &dev_attr_usbip_debug.attr,
- NULL,
-};
-
-const struct attribute_group dev_attr_group = {
- .attrs = dev_attrs,
-};
+++ /dev/null
-/*
- * Copyright (C) 2003-2008 Takahiro Hirofuchi
- *
- * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#include <linux/kthread.h>
-#include <linux/slab.h>
-
-#include "usbip_common.h"
-#include "vhci.h"
-
-static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
-{
- struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
- struct vhci_device *vdev = priv->vdev;
-
- usbip_dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
- usb_pipedevice(urb->pipe), vdev->devid);
-
- pdup->base.command = USBIP_CMD_SUBMIT;
- pdup->base.seqnum = priv->seqnum;
- pdup->base.devid = vdev->devid;
- pdup->base.direction = usb_pipein(urb->pipe) ?
- USBIP_DIR_IN : USBIP_DIR_OUT;
- pdup->base.ep = usb_pipeendpoint(urb->pipe);
-
- usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
-
- if (urb->setup_packet)
- memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
-}
-
-static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
-{
- struct vhci_priv *priv, *tmp;
-
- spin_lock(&vdev->priv_lock);
-
- list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
- list_move_tail(&priv->list, &vdev->priv_rx);
- spin_unlock(&vdev->priv_lock);
- return priv;
- }
-
- spin_unlock(&vdev->priv_lock);
-
- return NULL;
-}
-
-static int vhci_send_cmd_submit(struct vhci_device *vdev)
-{
- struct vhci_priv *priv = NULL;
-
- struct msghdr msg;
- struct kvec iov[3];
- size_t txsize;
-
- size_t total_size = 0;
-
- while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
- int ret;
- struct urb *urb = priv->urb;
- struct usbip_header pdu_header;
- struct usbip_iso_packet_descriptor *iso_buffer = NULL;
-
- txsize = 0;
- memset(&pdu_header, 0, sizeof(pdu_header));
- memset(&msg, 0, sizeof(msg));
- memset(&iov, 0, sizeof(iov));
-
- usbip_dbg_vhci_tx("setup txdata urb %p\n", urb);
-
- /* 1. setup usbip_header */
- setup_cmd_submit_pdu(&pdu_header, urb);
- usbip_header_correct_endian(&pdu_header, 1);
-
- iov[0].iov_base = &pdu_header;
- iov[0].iov_len = sizeof(pdu_header);
- txsize += sizeof(pdu_header);
-
- /* 2. setup transfer buffer */
- if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
- iov[1].iov_base = urb->transfer_buffer;
- iov[1].iov_len = urb->transfer_buffer_length;
- txsize += urb->transfer_buffer_length;
- }
-
- /* 3. setup iso_packet_descriptor */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- ssize_t len = 0;
-
- iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
- if (!iso_buffer) {
- usbip_event_add(&vdev->ud,
- SDEV_EVENT_ERROR_MALLOC);
- return -1;
- }
-
- iov[2].iov_base = iso_buffer;
- iov[2].iov_len = len;
- txsize += len;
- }
-
- ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
- if (ret != txsize) {
- pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
- txsize);
- kfree(iso_buffer);
- usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
- return -1;
- }
-
- kfree(iso_buffer);
- usbip_dbg_vhci_tx("send txdata\n");
-
- total_size += txsize;
- }
-
- return total_size;
-}
-
-static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
-{
- struct vhci_unlink *unlink, *tmp;
-
- spin_lock(&vdev->priv_lock);
-
- list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
- list_move_tail(&unlink->list, &vdev->unlink_rx);
- spin_unlock(&vdev->priv_lock);
- return unlink;
- }
-
- spin_unlock(&vdev->priv_lock);
-
- return NULL;
-}
-
-static int vhci_send_cmd_unlink(struct vhci_device *vdev)
-{
- struct vhci_unlink *unlink = NULL;
-
- struct msghdr msg;
- struct kvec iov[3];
- size_t txsize;
-
- size_t total_size = 0;
-
- while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
- int ret;
- struct usbip_header pdu_header;
-
- txsize = 0;
- memset(&pdu_header, 0, sizeof(pdu_header));
- memset(&msg, 0, sizeof(msg));
- memset(&iov, 0, sizeof(iov));
-
- usbip_dbg_vhci_tx("setup cmd unlink, %lu\n", unlink->seqnum);
-
- /* 1. setup usbip_header */
- pdu_header.base.command = USBIP_CMD_UNLINK;
- pdu_header.base.seqnum = unlink->seqnum;
- pdu_header.base.devid = vdev->devid;
- pdu_header.base.ep = 0;
- pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
-
- usbip_header_correct_endian(&pdu_header, 1);
-
- iov[0].iov_base = &pdu_header;
- iov[0].iov_len = sizeof(pdu_header);
- txsize += sizeof(pdu_header);
-
- ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
- if (ret != txsize) {
- pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
- txsize);
- usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
- return -1;
- }
-
- usbip_dbg_vhci_tx("send txdata\n");
-
- total_size += txsize;
- }
-
- return total_size;
-}
-
-int vhci_tx_loop(void *data)
-{
- struct usbip_device *ud = data;
- struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
-
- while (!kthread_should_stop()) {
- if (vhci_send_cmd_submit(vdev) < 0)
- break;
-
- if (vhci_send_cmd_unlink(vdev) < 0)
- break;
-
- wait_event_interruptible(vdev->waitq_tx,
- (!list_empty(&vdev->priv_tx) ||
- !list_empty(&vdev->unlink_tx) ||
- kthread_should_stop()));
-
- usbip_dbg_vhci_tx("pending urbs ?, now wake up\n");
- }
-
- return 0;
-}
source "drivers/usb/image/Kconfig"
+source "drivers/usb/usbip/Kconfig"
+
endif
source "drivers/usb/musb/Kconfig"
obj-$(CONFIG_USB_GADGET) += gadget/
obj-$(CONFIG_USB_COMMON) += common/
+
+obj-$(CONFIG_USBIP_CORE) += usbip/
--- /dev/null
+config USBIP_CORE
+ tristate "USB/IP support"
+ depends on USB && NET
+ ---help---
+ This enables pushing USB packets over IP to allow remote
+ machines direct access to USB devices. It provides the
+ USB/IP core that is required by both drivers.
+
+ For more details, and to get the userspace utility
+ programs, please see <http://usbip.sourceforge.net/>.
+
+ To compile this as a module, choose M here: the module will
+ be called usbip-core.
+
+ If unsure, say N.
+
+config USBIP_VHCI_HCD
+ tristate "VHCI hcd"
+ depends on USBIP_CORE
+ ---help---
+ This enables the USB/IP virtual host controller driver,
+ which is run on the remote machine.
+
+ To compile this driver as a module, choose M here: the
+ module will be called vhci-hcd.
+
+config USBIP_HOST
+ tristate "Host driver"
+ depends on USBIP_CORE
+ ---help---
+ This enables the USB/IP host driver, which is run on the
+ machine that is sharing the USB devices.
+
+ To compile this driver as a module, choose M here: the
+ module will be called usbip-host.
+
+config USBIP_DEBUG
+ bool "Debug messages for USB/IP"
+ depends on USBIP_CORE
+ ---help---
+ This enables the debug messages from the USB/IP drivers.
--- /dev/null
+ccflags-$(CONFIG_USBIP_DEBUG) := -DDEBUG
+
+obj-$(CONFIG_USBIP_CORE) += usbip-core.o
+usbip-core-y := usbip_common.o usbip_event.o
+
+obj-$(CONFIG_USBIP_VHCI_HCD) += vhci-hcd.o
+vhci-hcd-y := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o
+
+obj-$(CONFIG_USBIP_HOST) += usbip-host.o
+usbip-host-y := stub_dev.o stub_main.o stub_rx.o stub_tx.o
--- /dev/null
+TODO:
+ - more discussion about the protocol
+ - testing
+ - review of the userspace interface
+ - document the protocol
+
+Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#ifndef __USBIP_STUB_H
+#define __USBIP_STUB_H
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/usb.h>
+#include <linux/wait.h>
+
+#define STUB_BUSID_OTHER 0
+#define STUB_BUSID_REMOV 1
+#define STUB_BUSID_ADDED 2
+#define STUB_BUSID_ALLOC 3
+
+struct stub_device {
+ struct usb_interface *interface;
+ struct usb_device *udev;
+
+ struct usbip_device ud;
+ __u32 devid;
+
+ /*
+ * stub_priv preserves private data of each urb.
+ * It is allocated as stub_priv_cache and assigned to urb->context.
+ *
+ * stub_priv is always linked to any one of 3 lists;
+ * priv_init: linked to this until the comletion of a urb.
+ * priv_tx : linked to this after the completion of a urb.
+ * priv_free: linked to this after the sending of the result.
+ *
+ * Any of these list operations should be locked by priv_lock.
+ */
+ spinlock_t priv_lock;
+ struct list_head priv_init;
+ struct list_head priv_tx;
+ struct list_head priv_free;
+
+ /* see comments for unlinking in stub_rx.c */
+ struct list_head unlink_tx;
+ struct list_head unlink_free;
+
+ wait_queue_head_t tx_waitq;
+};
+
+/* private data into urb->priv */
+struct stub_priv {
+ unsigned long seqnum;
+ struct list_head list;
+ struct stub_device *sdev;
+ struct urb *urb;
+
+ int unlinking;
+};
+
+struct stub_unlink {
+ unsigned long seqnum;
+ struct list_head list;
+ __u32 status;
+};
+
+/* same as SYSFS_BUS_ID_SIZE */
+#define BUSID_SIZE 32
+
+struct bus_id_priv {
+ char name[BUSID_SIZE];
+ char status;
+ int interf_count;
+ struct stub_device *sdev;
+ struct usb_device *udev;
+ char shutdown_busid;
+};
+
+/* stub_priv is allocated from stub_priv_cache */
+extern struct kmem_cache *stub_priv_cache;
+
+/* stub_dev.c */
+extern struct usb_device_driver stub_driver;
+
+/* stub_main.c */
+struct bus_id_priv *get_busid_priv(const char *busid);
+int del_match_busid(char *busid);
+void stub_device_cleanup_urbs(struct stub_device *sdev);
+
+/* stub_rx.c */
+int stub_rx_loop(void *data);
+
+/* stub_tx.c */
+void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
+ __u32 status);
+void stub_complete(struct urb *urb);
+int stub_tx_loop(void *data);
+
+#endif /* __USBIP_STUB_H */
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/device.h>
+#include <linux/file.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+
+#include "usbip_common.h"
+#include "stub.h"
+
+/*
+ * Define device IDs here if you want to explicitly limit exportable devices.
+ * In most cases, wildcard matching will be okay because driver binding can be
+ * changed dynamically by a userland program.
+ */
+static struct usb_device_id stub_table[] = {
+#if 0
+ /* just an example */
+ { USB_DEVICE(0x05ac, 0x0301) }, /* Mac 1 button mouse */
+ { USB_DEVICE(0x0430, 0x0009) }, /* Plat Home Keyboard */
+ { USB_DEVICE(0x059b, 0x0001) }, /* Iomega USB Zip 100 */
+ { USB_DEVICE(0x04b3, 0x4427) }, /* IBM USB CD-ROM */
+ { USB_DEVICE(0x05a9, 0xa511) }, /* LifeView USB cam */
+ { USB_DEVICE(0x55aa, 0x0201) }, /* Imation card reader */
+ { USB_DEVICE(0x046d, 0x0870) }, /* Qcam Express(QV-30) */
+ { USB_DEVICE(0x04bb, 0x0101) }, /* IO-DATA HD 120GB */
+ { USB_DEVICE(0x04bb, 0x0904) }, /* IO-DATA USB-ET/TX */
+ { USB_DEVICE(0x04bb, 0x0201) }, /* IO-DATA USB-ET/TX */
+ { USB_DEVICE(0x08bb, 0x2702) }, /* ONKYO USB Speaker */
+ { USB_DEVICE(0x046d, 0x08b2) }, /* Logicool Qcam 4000 Pro */
+#endif
+ /* magic for wild card */
+ { .driver_info = 1 },
+ { 0, } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, stub_table);
+
+/*
+ * usbip_status shows the status of usbip-host as long as this driver is bound
+ * to the target device.
+ */
+static ssize_t usbip_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct stub_device *sdev = dev_get_drvdata(dev);
+ int status;
+
+ if (!sdev) {
+ dev_err(dev, "sdev is null\n");
+ return -ENODEV;
+ }
+
+ spin_lock_irq(&sdev->ud.lock);
+ status = sdev->ud.status;
+ spin_unlock_irq(&sdev->ud.lock);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", status);
+}
+static DEVICE_ATTR_RO(usbip_status);
+
+/*
+ * usbip_sockfd gets a socket descriptor of an established TCP connection that
+ * is used to transfer usbip requests by kernel threads. -1 is a magic number
+ * by which usbip connection is finished.
+ */
+static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct stub_device *sdev = dev_get_drvdata(dev);
+ int sockfd = 0;
+ struct socket *socket;
+ int rv;
+
+ if (!sdev) {
+ dev_err(dev, "sdev is null\n");
+ return -ENODEV;
+ }
+
+ rv = sscanf(buf, "%d", &sockfd);
+ if (rv != 1)
+ return -EINVAL;
+
+ if (sockfd != -1) {
+ int err;
+
+ dev_info(dev, "stub up\n");
+
+ spin_lock_irq(&sdev->ud.lock);
+
+ if (sdev->ud.status != SDEV_ST_AVAILABLE) {
+ dev_err(dev, "not ready\n");
+ goto err;
+ }
+
+ socket = sockfd_lookup(sockfd, &err);
+ if (!socket)
+ goto err;
+
+ sdev->ud.tcp_socket = socket;
+
+ spin_unlock_irq(&sdev->ud.lock);
+
+ sdev->ud.tcp_rx = kthread_get_run(stub_rx_loop, &sdev->ud,
+ "stub_rx");
+ sdev->ud.tcp_tx = kthread_get_run(stub_tx_loop, &sdev->ud,
+ "stub_tx");
+
+ spin_lock_irq(&sdev->ud.lock);
+ sdev->ud.status = SDEV_ST_USED;
+ spin_unlock_irq(&sdev->ud.lock);
+
+ } else {
+ dev_info(dev, "stub down\n");
+
+ spin_lock_irq(&sdev->ud.lock);
+ if (sdev->ud.status != SDEV_ST_USED)
+ goto err;
+
+ spin_unlock_irq(&sdev->ud.lock);
+
+ usbip_event_add(&sdev->ud, SDEV_EVENT_DOWN);
+ }
+
+ return count;
+
+err:
+ spin_unlock_irq(&sdev->ud.lock);
+ return -EINVAL;
+}
+static DEVICE_ATTR(usbip_sockfd, S_IWUSR, NULL, store_sockfd);
+
+static int stub_add_files(struct device *dev)
+{
+ int err = 0;
+
+ err = device_create_file(dev, &dev_attr_usbip_status);
+ if (err)
+ goto err_status;
+
+ err = device_create_file(dev, &dev_attr_usbip_sockfd);
+ if (err)
+ goto err_sockfd;
+
+ err = device_create_file(dev, &dev_attr_usbip_debug);
+ if (err)
+ goto err_debug;
+
+ return 0;
+
+err_debug:
+ device_remove_file(dev, &dev_attr_usbip_sockfd);
+err_sockfd:
+ device_remove_file(dev, &dev_attr_usbip_status);
+err_status:
+ return err;
+}
+
+static void stub_remove_files(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_usbip_status);
+ device_remove_file(dev, &dev_attr_usbip_sockfd);
+ device_remove_file(dev, &dev_attr_usbip_debug);
+}
+
+static void stub_shutdown_connection(struct usbip_device *ud)
+{
+ struct stub_device *sdev = container_of(ud, struct stub_device, ud);
+
+ /*
+ * When removing an exported device, kernel panic sometimes occurred
+ * and then EIP was sk_wait_data of stub_rx thread. Is this because
+ * sk_wait_data returned though stub_rx thread was already finished by
+ * step 1?
+ */
+ if (ud->tcp_socket) {
+ dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n",
+ ud->tcp_socket);
+ kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
+ }
+
+ /* 1. stop threads */
+ if (ud->tcp_rx) {
+ kthread_stop_put(ud->tcp_rx);
+ ud->tcp_rx = NULL;
+ }
+ if (ud->tcp_tx) {
+ kthread_stop_put(ud->tcp_tx);
+ ud->tcp_tx = NULL;
+ }
+
+ /*
+ * 2. close the socket
+ *
+ * tcp_socket is freed after threads are killed so that usbip_xmit does
+ * not touch NULL socket.
+ */
+ if (ud->tcp_socket) {
+ sockfd_put(ud->tcp_socket);
+ ud->tcp_socket = NULL;
+ }
+
+ /* 3. free used data */
+ stub_device_cleanup_urbs(sdev);
+
+ /* 4. free stub_unlink */
+ {
+ unsigned long flags;
+ struct stub_unlink *unlink, *tmp;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+ list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
+ list_del(&unlink->list);
+ kfree(unlink);
+ }
+ list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free,
+ list) {
+ list_del(&unlink->list);
+ kfree(unlink);
+ }
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+ }
+}
+
+static void stub_device_reset(struct usbip_device *ud)
+{
+ struct stub_device *sdev = container_of(ud, struct stub_device, ud);
+ struct usb_device *udev = sdev->udev;
+ int ret;
+
+ dev_dbg(&udev->dev, "device reset");
+
+ ret = usb_lock_device_for_reset(udev, sdev->interface);
+ if (ret < 0) {
+ dev_err(&udev->dev, "lock for reset\n");
+ spin_lock_irq(&ud->lock);
+ ud->status = SDEV_ST_ERROR;
+ spin_unlock_irq(&ud->lock);
+ return;
+ }
+
+ /* try to reset the device */
+ ret = usb_reset_device(udev);
+ usb_unlock_device(udev);
+
+ spin_lock_irq(&ud->lock);
+ if (ret) {
+ dev_err(&udev->dev, "device reset\n");
+ ud->status = SDEV_ST_ERROR;
+ } else {
+ dev_info(&udev->dev, "device reset\n");
+ ud->status = SDEV_ST_AVAILABLE;
+ }
+ spin_unlock_irq(&ud->lock);
+}
+
+static void stub_device_unusable(struct usbip_device *ud)
+{
+ spin_lock_irq(&ud->lock);
+ ud->status = SDEV_ST_ERROR;
+ spin_unlock_irq(&ud->lock);
+}
+
+/**
+ * stub_device_alloc - allocate a new stub_device struct
+ * @interface: usb_interface of a new device
+ *
+ * Allocates and initializes a new stub_device struct.
+ */
+static struct stub_device *stub_device_alloc(struct usb_device *udev)
+{
+ struct stub_device *sdev;
+ int busnum = udev->bus->busnum;
+ int devnum = udev->devnum;
+
+ dev_dbg(&udev->dev, "allocating stub device");
+
+ /* yes, it's a new device */
+ sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL);
+ if (!sdev)
+ return NULL;
+
+ sdev->udev = usb_get_dev(udev);
+
+ /*
+ * devid is defined with devnum when this driver is first allocated.
+ * devnum may change later if a device is reset. However, devid never
+ * changes during a usbip connection.
+ */
+ sdev->devid = (busnum << 16) | devnum;
+ sdev->ud.side = USBIP_STUB;
+ sdev->ud.status = SDEV_ST_AVAILABLE;
+ spin_lock_init(&sdev->ud.lock);
+ sdev->ud.tcp_socket = NULL;
+
+ INIT_LIST_HEAD(&sdev->priv_init);
+ INIT_LIST_HEAD(&sdev->priv_tx);
+ INIT_LIST_HEAD(&sdev->priv_free);
+ INIT_LIST_HEAD(&sdev->unlink_free);
+ INIT_LIST_HEAD(&sdev->unlink_tx);
+ spin_lock_init(&sdev->priv_lock);
+
+ init_waitqueue_head(&sdev->tx_waitq);
+
+ sdev->ud.eh_ops.shutdown = stub_shutdown_connection;
+ sdev->ud.eh_ops.reset = stub_device_reset;
+ sdev->ud.eh_ops.unusable = stub_device_unusable;
+
+ usbip_start_eh(&sdev->ud);
+
+ dev_dbg(&udev->dev, "register new device\n");
+
+ return sdev;
+}
+
+static void stub_device_free(struct stub_device *sdev)
+{
+ kfree(sdev);
+}
+
+static int stub_probe(struct usb_device *udev)
+{
+ struct stub_device *sdev = NULL;
+ const char *udev_busid = dev_name(&udev->dev);
+ int err = 0;
+ struct bus_id_priv *busid_priv;
+ int rc;
+
+ dev_dbg(&udev->dev, "Enter\n");
+
+ /* check we should claim or not by busid_table */
+ busid_priv = get_busid_priv(udev_busid);
+ if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) ||
+ (busid_priv->status == STUB_BUSID_OTHER)) {
+ dev_info(&udev->dev,
+ "%s is not in match_busid table... skip!\n",
+ udev_busid);
+
+ /*
+ * Return value should be ENODEV or ENOXIO to continue trying
+ * other matched drivers by the driver core.
+ * See driver_probe_device() in driver/base/dd.c
+ */
+ return -ENODEV;
+ }
+
+ if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) {
+ dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n",
+ udev_busid);
+ return -ENODEV;
+ }
+
+ if (!strcmp(udev->bus->bus_name, "vhci_hcd")) {
+ dev_dbg(&udev->dev,
+ "%s is attached on vhci_hcd... skip!\n",
+ udev_busid);
+
+ return -ENODEV;
+ }
+
+ /* ok, this is my device */
+ sdev = stub_device_alloc(udev);
+ if (!sdev)
+ return -ENOMEM;
+
+ dev_info(&udev->dev,
+ "usbip-host: register new device (bus %u dev %u)\n",
+ udev->bus->busnum, udev->devnum);
+
+ busid_priv->shutdown_busid = 0;
+
+ /* set private data to usb_device */
+ dev_set_drvdata(&udev->dev, sdev);
+ busid_priv->sdev = sdev;
+ busid_priv->udev = udev;
+
+ /*
+ * Claim this hub port.
+ * It doesn't matter what value we pass as owner
+ * (struct dev_state) as long as it is unique.
+ */
+ rc = usb_hub_claim_port(udev->parent, udev->portnum,
+ (struct usb_dev_state *) udev);
+ if (rc) {
+ dev_dbg(&udev->dev, "unable to claim port\n");
+ return rc;
+ }
+
+ err = stub_add_files(&udev->dev);
+ if (err) {
+ dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
+ dev_set_drvdata(&udev->dev, NULL);
+ usb_put_dev(udev);
+ kthread_stop_put(sdev->ud.eh);
+
+ busid_priv->sdev = NULL;
+ stub_device_free(sdev);
+ return err;
+ }
+ busid_priv->status = STUB_BUSID_ALLOC;
+
+ return 0;
+}
+
+static void shutdown_busid(struct bus_id_priv *busid_priv)
+{
+ if (busid_priv->sdev && !busid_priv->shutdown_busid) {
+ busid_priv->shutdown_busid = 1;
+ usbip_event_add(&busid_priv->sdev->ud, SDEV_EVENT_REMOVED);
+
+ /* wait for the stop of the event handler */
+ usbip_stop_eh(&busid_priv->sdev->ud);
+ }
+}
+
+/*
+ * called in usb_disconnect() or usb_deregister()
+ * but only if actconfig(active configuration) exists
+ */
+static void stub_disconnect(struct usb_device *udev)
+{
+ struct stub_device *sdev;
+ const char *udev_busid = dev_name(&udev->dev);
+ struct bus_id_priv *busid_priv;
+ int rc;
+
+ dev_dbg(&udev->dev, "Enter\n");
+
+ busid_priv = get_busid_priv(udev_busid);
+ if (!busid_priv) {
+ BUG();
+ return;
+ }
+
+ sdev = dev_get_drvdata(&udev->dev);
+
+ /* get stub_device */
+ if (!sdev) {
+ dev_err(&udev->dev, "could not get device");
+ return;
+ }
+
+ dev_set_drvdata(&udev->dev, NULL);
+
+ /*
+ * NOTE: rx/tx threads are invoked for each usb_device.
+ */
+ stub_remove_files(&udev->dev);
+
+ /* release port */
+ rc = usb_hub_release_port(udev->parent, udev->portnum,
+ (struct usb_dev_state *) udev);
+ if (rc) {
+ dev_dbg(&udev->dev, "unable to release port\n");
+ return;
+ }
+
+ /* If usb reset is called from event handler */
+ if (busid_priv->sdev->ud.eh == current)
+ return;
+
+ /* shutdown the current connection */
+ shutdown_busid(busid_priv);
+
+ usb_put_dev(sdev->udev);
+
+ /* free sdev */
+ busid_priv->sdev = NULL;
+ stub_device_free(sdev);
+
+ if (busid_priv->status == STUB_BUSID_ALLOC) {
+ busid_priv->status = STUB_BUSID_ADDED;
+ } else {
+ busid_priv->status = STUB_BUSID_OTHER;
+ del_match_busid((char *)udev_busid);
+ }
+}
+
+#ifdef CONFIG_PM
+
+/* These functions need usb_port_suspend and usb_port_resume,
+ * which reside in drivers/usb/core/usb.h. Skip for now. */
+
+static int stub_suspend(struct usb_device *udev, pm_message_t message)
+{
+ dev_dbg(&udev->dev, "stub_suspend\n");
+
+ return 0;
+}
+
+static int stub_resume(struct usb_device *udev, pm_message_t message)
+{
+ dev_dbg(&udev->dev, "stub_resume\n");
+
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
+struct usb_device_driver stub_driver = {
+ .name = "usbip-host",
+ .probe = stub_probe,
+ .disconnect = stub_disconnect,
+#ifdef CONFIG_PM
+ .suspend = stub_suspend,
+ .resume = stub_resume,
+#endif
+ .supports_autosuspend = 0,
+};
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/device.h>
+
+#include "usbip_common.h"
+#include "stub.h"
+
+#define DRIVER_AUTHOR "Takahiro Hirofuchi"
+#define DRIVER_DESC "USB/IP Host Driver"
+
+struct kmem_cache *stub_priv_cache;
+/*
+ * busid_tables defines matching busids that usbip can grab. A user can change
+ * dynamically what device is locally used and what device is exported to a
+ * remote host.
+ */
+#define MAX_BUSID 16
+static struct bus_id_priv busid_table[MAX_BUSID];
+static spinlock_t busid_table_lock;
+
+static void init_busid_table(void)
+{
+ /*
+ * This also sets the bus_table[i].status to
+ * STUB_BUSID_OTHER, which is 0.
+ */
+ memset(busid_table, 0, sizeof(busid_table));
+
+ spin_lock_init(&busid_table_lock);
+}
+
+/*
+ * Find the index of the busid by name.
+ * Must be called with busid_table_lock held.
+ */
+static int get_busid_idx(const char *busid)
+{
+ int i;
+ int idx = -1;
+
+ for (i = 0; i < MAX_BUSID; i++)
+ if (busid_table[i].name[0])
+ if (!strncmp(busid_table[i].name, busid, BUSID_SIZE)) {
+ idx = i;
+ break;
+ }
+ return idx;
+}
+
+struct bus_id_priv *get_busid_priv(const char *busid)
+{
+ int idx;
+ struct bus_id_priv *bid = NULL;
+
+ spin_lock(&busid_table_lock);
+ idx = get_busid_idx(busid);
+ if (idx >= 0)
+ bid = &(busid_table[idx]);
+ spin_unlock(&busid_table_lock);
+
+ return bid;
+}
+
+static int add_match_busid(char *busid)
+{
+ int i;
+ int ret = -1;
+
+ spin_lock(&busid_table_lock);
+ /* already registered? */
+ if (get_busid_idx(busid) >= 0) {
+ ret = 0;
+ goto out;
+ }
+
+ for (i = 0; i < MAX_BUSID; i++)
+ if (!busid_table[i].name[0]) {
+ strlcpy(busid_table[i].name, busid, BUSID_SIZE);
+ if ((busid_table[i].status != STUB_BUSID_ALLOC) &&
+ (busid_table[i].status != STUB_BUSID_REMOV))
+ busid_table[i].status = STUB_BUSID_ADDED;
+ ret = 0;
+ break;
+ }
+
+out:
+ spin_unlock(&busid_table_lock);
+
+ return ret;
+}
+
+int del_match_busid(char *busid)
+{
+ int idx;
+ int ret = -1;
+
+ spin_lock(&busid_table_lock);
+ idx = get_busid_idx(busid);
+ if (idx < 0)
+ goto out;
+
+ /* found */
+ ret = 0;
+
+ if (busid_table[idx].status == STUB_BUSID_OTHER)
+ memset(busid_table[idx].name, 0, BUSID_SIZE);
+
+ if ((busid_table[idx].status != STUB_BUSID_OTHER) &&
+ (busid_table[idx].status != STUB_BUSID_ADDED))
+ busid_table[idx].status = STUB_BUSID_REMOV;
+
+out:
+ spin_unlock(&busid_table_lock);
+
+ return ret;
+}
+
+static ssize_t show_match_busid(struct device_driver *drv, char *buf)
+{
+ int i;
+ char *out = buf;
+
+ spin_lock(&busid_table_lock);
+ for (i = 0; i < MAX_BUSID; i++)
+ if (busid_table[i].name[0])
+ out += sprintf(out, "%s ", busid_table[i].name);
+ spin_unlock(&busid_table_lock);
+ out += sprintf(out, "\n");
+
+ return out - buf;
+}
+
+static ssize_t store_match_busid(struct device_driver *dev, const char *buf,
+ size_t count)
+{
+ int len;
+ char busid[BUSID_SIZE];
+
+ if (count < 5)
+ return -EINVAL;
+
+ /* busid needs to include \0 termination */
+ len = strlcpy(busid, buf + 4, BUSID_SIZE);
+ if (sizeof(busid) <= len)
+ return -EINVAL;
+
+ if (!strncmp(buf, "add ", 4)) {
+ if (add_match_busid(busid) < 0)
+ return -ENOMEM;
+
+ pr_debug("add busid %s\n", busid);
+ return count;
+ }
+
+ if (!strncmp(buf, "del ", 4)) {
+ if (del_match_busid(busid) < 0)
+ return -ENODEV;
+
+ pr_debug("del busid %s\n", busid);
+ return count;
+ }
+
+ return -EINVAL;
+}
+static DRIVER_ATTR(match_busid, S_IRUSR | S_IWUSR, show_match_busid,
+ store_match_busid);
+
+static ssize_t rebind_store(struct device_driver *dev, const char *buf,
+ size_t count)
+{
+ int ret;
+ int len;
+ struct bus_id_priv *bid;
+
+ /* buf length should be less that BUSID_SIZE */
+ len = strnlen(buf, BUSID_SIZE);
+
+ if (!(len < BUSID_SIZE))
+ return -EINVAL;
+
+ bid = get_busid_priv(buf);
+ if (!bid)
+ return -ENODEV;
+
+ ret = device_attach(&bid->udev->dev);
+ if (ret < 0) {
+ dev_err(&bid->udev->dev, "rebind failed\n");
+ return ret;
+ }
+
+ return count;
+}
+
+static DRIVER_ATTR_WO(rebind);
+
+static struct stub_priv *stub_priv_pop_from_listhead(struct list_head *listhead)
+{
+ struct stub_priv *priv, *tmp;
+
+ list_for_each_entry_safe(priv, tmp, listhead, list) {
+ list_del(&priv->list);
+ return priv;
+ }
+
+ return NULL;
+}
+
+static struct stub_priv *stub_priv_pop(struct stub_device *sdev)
+{
+ unsigned long flags;
+ struct stub_priv *priv;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ priv = stub_priv_pop_from_listhead(&sdev->priv_init);
+ if (priv)
+ goto done;
+
+ priv = stub_priv_pop_from_listhead(&sdev->priv_tx);
+ if (priv)
+ goto done;
+
+ priv = stub_priv_pop_from_listhead(&sdev->priv_free);
+
+done:
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return priv;
+}
+
+void stub_device_cleanup_urbs(struct stub_device *sdev)
+{
+ struct stub_priv *priv;
+ struct urb *urb;
+
+ dev_dbg(&sdev->udev->dev, "free sdev %p\n", sdev);
+
+ while ((priv = stub_priv_pop(sdev))) {
+ urb = priv->urb;
+ dev_dbg(&sdev->udev->dev, "free urb %p\n", urb);
+ usb_kill_urb(urb);
+
+ kmem_cache_free(stub_priv_cache, priv);
+
+ kfree(urb->transfer_buffer);
+ kfree(urb->setup_packet);
+ usb_free_urb(urb);
+ }
+}
+
+static int __init usbip_host_init(void)
+{
+ int ret;
+
+ init_busid_table();
+
+ stub_priv_cache = KMEM_CACHE(stub_priv, SLAB_HWCACHE_ALIGN);
+ if (!stub_priv_cache) {
+ pr_err("kmem_cache_create failed\n");
+ return -ENOMEM;
+ }
+
+ ret = usb_register_device_driver(&stub_driver, THIS_MODULE);
+ if (ret) {
+ pr_err("usb_register failed %d\n", ret);
+ goto err_usb_register;
+ }
+
+ ret = driver_create_file(&stub_driver.drvwrap.driver,
+ &driver_attr_match_busid);
+ if (ret) {
+ pr_err("driver_create_file failed\n");
+ goto err_create_file;
+ }
+
+ ret = driver_create_file(&stub_driver.drvwrap.driver,
+ &driver_attr_rebind);
+ if (ret) {
+ pr_err("driver_create_file failed\n");
+ goto err_create_file;
+ }
+
+ pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
+ return ret;
+
+err_create_file:
+ usb_deregister_device_driver(&stub_driver);
+err_usb_register:
+ kmem_cache_destroy(stub_priv_cache);
+ return ret;
+}
+
+static void __exit usbip_host_exit(void)
+{
+ driver_remove_file(&stub_driver.drvwrap.driver,
+ &driver_attr_match_busid);
+
+ driver_remove_file(&stub_driver.drvwrap.driver,
+ &driver_attr_rebind);
+
+ /*
+ * deregister() calls stub_disconnect() for all devices. Device
+ * specific data is cleared in stub_disconnect().
+ */
+ usb_deregister_device_driver(&stub_driver);
+
+ kmem_cache_destroy(stub_priv_cache);
+}
+
+module_init(usbip_host_init);
+module_exit(usbip_host_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(USBIP_VERSION);
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <asm/byteorder.h>
+#include <linux/kthread.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "usbip_common.h"
+#include "stub.h"
+
+static int is_clear_halt_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+
+ return (req->bRequest == USB_REQ_CLEAR_FEATURE) &&
+ (req->bRequestType == USB_RECIP_ENDPOINT) &&
+ (req->wValue == USB_ENDPOINT_HALT);
+}
+
+static int is_set_interface_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+
+ return (req->bRequest == USB_REQ_SET_INTERFACE) &&
+ (req->bRequestType == USB_RECIP_INTERFACE);
+}
+
+static int is_set_configuration_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+
+ return (req->bRequest == USB_REQ_SET_CONFIGURATION) &&
+ (req->bRequestType == USB_RECIP_DEVICE);
+}
+
+static int is_reset_device_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+ __u16 value;
+ __u16 index;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+ value = le16_to_cpu(req->wValue);
+ index = le16_to_cpu(req->wIndex);
+
+ if ((req->bRequest == USB_REQ_SET_FEATURE) &&
+ (req->bRequestType == USB_RT_PORT) &&
+ (value == USB_PORT_FEAT_RESET)) {
+ usbip_dbg_stub_rx("reset_device_cmd, port %u\n", index);
+ return 1;
+ } else
+ return 0;
+}
+
+static int tweak_clear_halt_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+ int target_endp;
+ int target_dir;
+ int target_pipe;
+ int ret;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+
+ /*
+ * The stalled endpoint is specified in the wIndex value. The endpoint
+ * of the urb is the target of this clear_halt request (i.e., control
+ * endpoint).
+ */
+ target_endp = le16_to_cpu(req->wIndex) & 0x000f;
+
+ /* the stalled endpoint direction is IN or OUT?. USB_DIR_IN is 0x80. */
+ target_dir = le16_to_cpu(req->wIndex) & 0x0080;
+
+ if (target_dir)
+ target_pipe = usb_rcvctrlpipe(urb->dev, target_endp);
+ else
+ target_pipe = usb_sndctrlpipe(urb->dev, target_endp);
+
+ ret = usb_clear_halt(urb->dev, target_pipe);
+ if (ret < 0)
+ dev_err(&urb->dev->dev,
+ "usb_clear_halt error: devnum %d endp %d ret %d\n",
+ urb->dev->devnum, target_endp, ret);
+ else
+ dev_info(&urb->dev->dev,
+ "usb_clear_halt done: devnum %d endp %d\n",
+ urb->dev->devnum, target_endp);
+
+ return ret;
+}
+
+static int tweak_set_interface_cmd(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+ __u16 alternate;
+ __u16 interface;
+ int ret;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+ alternate = le16_to_cpu(req->wValue);
+ interface = le16_to_cpu(req->wIndex);
+
+ usbip_dbg_stub_rx("set_interface: inf %u alt %u\n",
+ interface, alternate);
+
+ ret = usb_set_interface(urb->dev, interface, alternate);
+ if (ret < 0)
+ dev_err(&urb->dev->dev,
+ "usb_set_interface error: inf %u alt %u ret %d\n",
+ interface, alternate, ret);
+ else
+ dev_info(&urb->dev->dev,
+ "usb_set_interface done: inf %u alt %u\n",
+ interface, alternate);
+
+ return ret;
+}
+
+static int tweak_set_configuration_cmd(struct urb *urb)
+{
+ struct stub_priv *priv = (struct stub_priv *) urb->context;
+ struct stub_device *sdev = priv->sdev;
+ struct usb_ctrlrequest *req;
+ __u16 config;
+ int err;
+
+ req = (struct usb_ctrlrequest *) urb->setup_packet;
+ config = le16_to_cpu(req->wValue);
+
+ err = usb_set_configuration(sdev->udev, config);
+ if (err && err != -ENODEV)
+ dev_err(&sdev->udev->dev, "can't set config #%d, error %d\n",
+ config, err);
+ return 0;
+}
+
+static int tweak_reset_device_cmd(struct urb *urb)
+{
+ struct stub_priv *priv = (struct stub_priv *) urb->context;
+ struct stub_device *sdev = priv->sdev;
+
+ dev_info(&urb->dev->dev, "usb_queue_reset_device\n");
+
+ /*
+ * With the implementation of pre_reset and post_reset the driver no
+ * longer unbinds. This allows the use of synchronous reset.
+ */
+
+ if (usb_lock_device_for_reset(sdev->udev, sdev->interface) < 0) {
+ dev_err(&urb->dev->dev, "could not obtain lock to reset device\n");
+ return 0;
+ }
+ usb_reset_device(sdev->udev);
+ usb_unlock_device(sdev->udev);
+
+ return 0;
+}
+
+/*
+ * clear_halt, set_interface, and set_configuration require special tricks.
+ */
+static void tweak_special_requests(struct urb *urb)
+{
+ if (!urb || !urb->setup_packet)
+ return;
+
+ if (usb_pipetype(urb->pipe) != PIPE_CONTROL)
+ return;
+
+ if (is_clear_halt_cmd(urb))
+ /* tweak clear_halt */
+ tweak_clear_halt_cmd(urb);
+
+ else if (is_set_interface_cmd(urb))
+ /* tweak set_interface */
+ tweak_set_interface_cmd(urb);
+
+ else if (is_set_configuration_cmd(urb))
+ /* tweak set_configuration */
+ tweak_set_configuration_cmd(urb);
+
+ else if (is_reset_device_cmd(urb))
+ tweak_reset_device_cmd(urb);
+ else
+ usbip_dbg_stub_rx("no need to tweak\n");
+}
+
+/*
+ * stub_recv_unlink() unlinks the URB by a call to usb_unlink_urb().
+ * By unlinking the urb asynchronously, stub_rx can continuously
+ * process coming urbs. Even if the urb is unlinked, its completion
+ * handler will be called and stub_tx will send a return pdu.
+ *
+ * See also comments about unlinking strategy in vhci_hcd.c.
+ */
+static int stub_recv_cmd_unlink(struct stub_device *sdev,
+ struct usbip_header *pdu)
+{
+ int ret;
+ unsigned long flags;
+ struct stub_priv *priv;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ list_for_each_entry(priv, &sdev->priv_init, list) {
+ if (priv->seqnum != pdu->u.cmd_unlink.seqnum)
+ continue;
+
+ dev_info(&priv->urb->dev->dev, "unlink urb %p\n",
+ priv->urb);
+
+ /*
+ * This matched urb is not completed yet (i.e., be in
+ * flight in usb hcd hardware/driver). Now we are
+ * cancelling it. The unlinking flag means that we are
+ * now not going to return the normal result pdu of a
+ * submission request, but going to return a result pdu
+ * of the unlink request.
+ */
+ priv->unlinking = 1;
+
+ /*
+ * In the case that unlinking flag is on, prev->seqnum
+ * is changed from the seqnum of the cancelling urb to
+ * the seqnum of the unlink request. This will be used
+ * to make the result pdu of the unlink request.
+ */
+ priv->seqnum = pdu->base.seqnum;
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ /*
+ * usb_unlink_urb() is now out of spinlocking to avoid
+ * spinlock recursion since stub_complete() is
+ * sometimes called in this context but not in the
+ * interrupt context. If stub_complete() is executed
+ * before we call usb_unlink_urb(), usb_unlink_urb()
+ * will return an error value. In this case, stub_tx
+ * will return the result pdu of this unlink request
+ * though submission is completed and actual unlinking
+ * is not executed. OK?
+ */
+ /* In the above case, urb->status is not -ECONNRESET,
+ * so a driver in a client host will know the failure
+ * of the unlink request ?
+ */
+ ret = usb_unlink_urb(priv->urb);
+ if (ret != -EINPROGRESS)
+ dev_err(&priv->urb->dev->dev,
+ "failed to unlink a urb %p, ret %d\n",
+ priv->urb, ret);
+
+ return 0;
+ }
+
+ usbip_dbg_stub_rx("seqnum %d is not pending\n",
+ pdu->u.cmd_unlink.seqnum);
+
+ /*
+ * The urb of the unlink target is not found in priv_init queue. It was
+ * already completed and its results is/was going to be sent by a
+ * CMD_RET pdu. In this case, usb_unlink_urb() is not needed. We only
+ * return the completeness of this unlink request to vhci_hcd.
+ */
+ stub_enqueue_ret_unlink(sdev, pdu->base.seqnum, 0);
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return 0;
+}
+
+static int valid_request(struct stub_device *sdev, struct usbip_header *pdu)
+{
+ struct usbip_device *ud = &sdev->ud;
+ int valid = 0;
+
+ if (pdu->base.devid == sdev->devid) {
+ spin_lock_irq(&ud->lock);
+ if (ud->status == SDEV_ST_USED) {
+ /* A request is valid. */
+ valid = 1;
+ }
+ spin_unlock_irq(&ud->lock);
+ }
+
+ return valid;
+}
+
+static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
+ struct usbip_header *pdu)
+{
+ struct stub_priv *priv;
+ struct usbip_device *ud = &sdev->ud;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ priv = kmem_cache_zalloc(stub_priv_cache, GFP_ATOMIC);
+ if (!priv) {
+ dev_err(&sdev->interface->dev, "alloc stub_priv\n");
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+ usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
+ return NULL;
+ }
+
+ priv->seqnum = pdu->base.seqnum;
+ priv->sdev = sdev;
+
+ /*
+ * After a stub_priv is linked to a list_head,
+ * our error handler can free allocated data.
+ */
+ list_add_tail(&priv->list, &sdev->priv_init);
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return priv;
+}
+
+static int get_pipe(struct stub_device *sdev, int epnum, int dir)
+{
+ struct usb_device *udev = sdev->udev;
+ struct usb_host_endpoint *ep;
+ struct usb_endpoint_descriptor *epd = NULL;
+
+ if (dir == USBIP_DIR_IN)
+ ep = udev->ep_in[epnum & 0x7f];
+ else
+ ep = udev->ep_out[epnum & 0x7f];
+ if (!ep) {
+ dev_err(&sdev->interface->dev, "no such endpoint?, %d\n",
+ epnum);
+ BUG();
+ }
+
+ epd = &ep->desc;
+ if (usb_endpoint_xfer_control(epd)) {
+ if (dir == USBIP_DIR_OUT)
+ return usb_sndctrlpipe(udev, epnum);
+ else
+ return usb_rcvctrlpipe(udev, epnum);
+ }
+
+ if (usb_endpoint_xfer_bulk(epd)) {
+ if (dir == USBIP_DIR_OUT)
+ return usb_sndbulkpipe(udev, epnum);
+ else
+ return usb_rcvbulkpipe(udev, epnum);
+ }
+
+ if (usb_endpoint_xfer_int(epd)) {
+ if (dir == USBIP_DIR_OUT)
+ return usb_sndintpipe(udev, epnum);
+ else
+ return usb_rcvintpipe(udev, epnum);
+ }
+
+ if (usb_endpoint_xfer_isoc(epd)) {
+ if (dir == USBIP_DIR_OUT)
+ return usb_sndisocpipe(udev, epnum);
+ else
+ return usb_rcvisocpipe(udev, epnum);
+ }
+
+ /* NOT REACHED */
+ dev_err(&sdev->interface->dev, "get pipe, epnum %d\n", epnum);
+ return 0;
+}
+
+static void masking_bogus_flags(struct urb *urb)
+{
+ int xfertype;
+ struct usb_device *dev;
+ struct usb_host_endpoint *ep;
+ int is_out;
+ unsigned int allowed;
+
+ if (!urb || urb->hcpriv || !urb->complete)
+ return;
+ dev = urb->dev;
+ if ((!dev) || (dev->state < USB_STATE_UNAUTHENTICATED))
+ return;
+
+ ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
+ [usb_pipeendpoint(urb->pipe)];
+ if (!ep)
+ return;
+
+ xfertype = usb_endpoint_type(&ep->desc);
+ if (xfertype == USB_ENDPOINT_XFER_CONTROL) {
+ struct usb_ctrlrequest *setup =
+ (struct usb_ctrlrequest *) urb->setup_packet;
+
+ if (!setup)
+ return;
+ is_out = !(setup->bRequestType & USB_DIR_IN) ||
+ !setup->wLength;
+ } else {
+ is_out = usb_endpoint_dir_out(&ep->desc);
+ }
+
+ /* enforce simple/standard policy */
+ allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT |
+ URB_DIR_MASK | URB_FREE_BUFFER);
+ switch (xfertype) {
+ case USB_ENDPOINT_XFER_BULK:
+ if (is_out)
+ allowed |= URB_ZERO_PACKET;
+ /* FALLTHROUGH */
+ case USB_ENDPOINT_XFER_CONTROL:
+ allowed |= URB_NO_FSBR; /* only affects UHCI */
+ /* FALLTHROUGH */
+ default: /* all non-iso endpoints */
+ if (!is_out)
+ allowed |= URB_SHORT_NOT_OK;
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ allowed |= URB_ISO_ASAP;
+ break;
+ }
+ urb->transfer_flags &= allowed;
+}
+
+static void stub_recv_cmd_submit(struct stub_device *sdev,
+ struct usbip_header *pdu)
+{
+ int ret;
+ struct stub_priv *priv;
+ struct usbip_device *ud = &sdev->ud;
+ struct usb_device *udev = sdev->udev;
+ int pipe = get_pipe(sdev, pdu->base.ep, pdu->base.direction);
+
+ priv = stub_priv_alloc(sdev, pdu);
+ if (!priv)
+ return;
+
+ /* setup a urb */
+ if (usb_pipeisoc(pipe))
+ priv->urb = usb_alloc_urb(pdu->u.cmd_submit.number_of_packets,
+ GFP_KERNEL);
+ else
+ priv->urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!priv->urb) {
+ dev_err(&sdev->interface->dev, "malloc urb\n");
+ usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ /* allocate urb transfer buffer, if needed */
+ if (pdu->u.cmd_submit.transfer_buffer_length > 0) {
+ priv->urb->transfer_buffer =
+ kzalloc(pdu->u.cmd_submit.transfer_buffer_length,
+ GFP_KERNEL);
+ if (!priv->urb->transfer_buffer) {
+ usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+ }
+
+ /* copy urb setup packet */
+ priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
+ GFP_KERNEL);
+ if (!priv->urb->setup_packet) {
+ dev_err(&sdev->interface->dev, "allocate setup_packet\n");
+ usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ /* set other members from the base header of pdu */
+ priv->urb->context = (void *) priv;
+ priv->urb->dev = udev;
+ priv->urb->pipe = pipe;
+ priv->urb->complete = stub_complete;
+
+ usbip_pack_pdu(pdu, priv->urb, USBIP_CMD_SUBMIT, 0);
+
+
+ if (usbip_recv_xbuff(ud, priv->urb) < 0)
+ return;
+
+ if (usbip_recv_iso(ud, priv->urb) < 0)
+ return;
+
+ /* no need to submit an intercepted request, but harmless? */
+ tweak_special_requests(priv->urb);
+
+ masking_bogus_flags(priv->urb);
+ /* urb is now ready to submit */
+ ret = usb_submit_urb(priv->urb, GFP_KERNEL);
+
+ if (ret == 0)
+ usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
+ pdu->base.seqnum);
+ else {
+ dev_err(&sdev->interface->dev, "submit_urb error, %d\n", ret);
+ usbip_dump_header(pdu);
+ usbip_dump_urb(priv->urb);
+
+ /*
+ * Pessimistic.
+ * This connection will be discarded.
+ */
+ usbip_event_add(ud, SDEV_EVENT_ERROR_SUBMIT);
+ }
+
+ usbip_dbg_stub_rx("Leave\n");
+}
+
+/* recv a pdu */
+static void stub_rx_pdu(struct usbip_device *ud)
+{
+ int ret;
+ struct usbip_header pdu;
+ struct stub_device *sdev = container_of(ud, struct stub_device, ud);
+ struct device *dev = &sdev->udev->dev;
+
+ usbip_dbg_stub_rx("Enter\n");
+
+ memset(&pdu, 0, sizeof(pdu));
+
+ /* receive a pdu header */
+ ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
+ if (ret != sizeof(pdu)) {
+ dev_err(dev, "recv a header, %d\n", ret);
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ return;
+ }
+
+ usbip_header_correct_endian(&pdu, 0);
+
+ if (usbip_dbg_flag_stub_rx)
+ usbip_dump_header(&pdu);
+
+ if (!valid_request(sdev, &pdu)) {
+ dev_err(dev, "recv invalid request\n");
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ return;
+ }
+
+ switch (pdu.base.command) {
+ case USBIP_CMD_UNLINK:
+ stub_recv_cmd_unlink(sdev, &pdu);
+ break;
+
+ case USBIP_CMD_SUBMIT:
+ stub_recv_cmd_submit(sdev, &pdu);
+ break;
+
+ default:
+ /* NOTREACHED */
+ dev_err(dev, "unknown pdu\n");
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ break;
+ }
+}
+
+int stub_rx_loop(void *data)
+{
+ struct usbip_device *ud = data;
+
+ while (!kthread_should_stop()) {
+ if (usbip_event_happened(ud))
+ break;
+
+ stub_rx_pdu(ud);
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/socket.h>
+
+#include "usbip_common.h"
+#include "stub.h"
+
+static void stub_free_priv_and_urb(struct stub_priv *priv)
+{
+ struct urb *urb = priv->urb;
+
+ kfree(urb->setup_packet);
+ kfree(urb->transfer_buffer);
+ list_del(&priv->list);
+ kmem_cache_free(stub_priv_cache, priv);
+ usb_free_urb(urb);
+}
+
+/* be in spin_lock_irqsave(&sdev->priv_lock, flags) */
+void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum,
+ __u32 status)
+{
+ struct stub_unlink *unlink;
+
+ unlink = kzalloc(sizeof(struct stub_unlink), GFP_ATOMIC);
+ if (!unlink) {
+ usbip_event_add(&sdev->ud, VDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ unlink->seqnum = seqnum;
+ unlink->status = status;
+
+ list_add_tail(&unlink->list, &sdev->unlink_tx);
+}
+
+/**
+ * stub_complete - completion handler of a usbip urb
+ * @urb: pointer to the urb completed
+ *
+ * When a urb has completed, the USB core driver calls this function mostly in
+ * the interrupt context. To return the result of a urb, the completed urb is
+ * linked to the pending list of returning.
+ *
+ */
+void stub_complete(struct urb *urb)
+{
+ struct stub_priv *priv = (struct stub_priv *) urb->context;
+ struct stub_device *sdev = priv->sdev;
+ unsigned long flags;
+
+ usbip_dbg_stub_tx("complete! status %d\n", urb->status);
+
+ switch (urb->status) {
+ case 0:
+ /* OK */
+ break;
+ case -ENOENT:
+ dev_info(&urb->dev->dev,
+ "stopped by a call to usb_kill_urb() because of cleaning up a virtual connection\n");
+ return;
+ case -ECONNRESET:
+ dev_info(&urb->dev->dev,
+ "unlinked by a call to usb_unlink_urb()\n");
+ break;
+ case -EPIPE:
+ dev_info(&urb->dev->dev, "endpoint %d is stalled\n",
+ usb_pipeendpoint(urb->pipe));
+ break;
+ case -ESHUTDOWN:
+ dev_info(&urb->dev->dev, "device removed?\n");
+ break;
+ default:
+ dev_info(&urb->dev->dev,
+ "urb completion with non-zero status %d\n",
+ urb->status);
+ break;
+ }
+
+ /* link a urb to the queue of tx. */
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+ if (priv->unlinking) {
+ stub_enqueue_ret_unlink(sdev, priv->seqnum, urb->status);
+ stub_free_priv_and_urb(priv);
+ } else {
+ list_move_tail(&priv->list, &sdev->priv_tx);
+ }
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ /* wake up tx_thread */
+ wake_up(&sdev->tx_waitq);
+}
+
+static inline void setup_base_pdu(struct usbip_header_basic *base,
+ __u32 command, __u32 seqnum)
+{
+ base->command = command;
+ base->seqnum = seqnum;
+ base->devid = 0;
+ base->ep = 0;
+ base->direction = 0;
+}
+
+static void setup_ret_submit_pdu(struct usbip_header *rpdu, struct urb *urb)
+{
+ struct stub_priv *priv = (struct stub_priv *) urb->context;
+
+ setup_base_pdu(&rpdu->base, USBIP_RET_SUBMIT, priv->seqnum);
+ usbip_pack_pdu(rpdu, urb, USBIP_RET_SUBMIT, 1);
+}
+
+static void setup_ret_unlink_pdu(struct usbip_header *rpdu,
+ struct stub_unlink *unlink)
+{
+ setup_base_pdu(&rpdu->base, USBIP_RET_UNLINK, unlink->seqnum);
+ rpdu->u.ret_unlink.status = unlink->status;
+}
+
+static struct stub_priv *dequeue_from_priv_tx(struct stub_device *sdev)
+{
+ unsigned long flags;
+ struct stub_priv *priv, *tmp;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ list_for_each_entry_safe(priv, tmp, &sdev->priv_tx, list) {
+ list_move_tail(&priv->list, &sdev->priv_free);
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+ return priv;
+ }
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return NULL;
+}
+
+static int stub_send_ret_submit(struct stub_device *sdev)
+{
+ unsigned long flags;
+ struct stub_priv *priv, *tmp;
+
+ struct msghdr msg;
+ size_t txsize;
+
+ size_t total_size = 0;
+
+ while ((priv = dequeue_from_priv_tx(sdev)) != NULL) {
+ int ret;
+ struct urb *urb = priv->urb;
+ struct usbip_header pdu_header;
+ struct usbip_iso_packet_descriptor *iso_buffer = NULL;
+ struct kvec *iov = NULL;
+ int iovnum = 0;
+
+ txsize = 0;
+ memset(&pdu_header, 0, sizeof(pdu_header));
+ memset(&msg, 0, sizeof(msg));
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+ iovnum = 2 + urb->number_of_packets;
+ else
+ iovnum = 2;
+
+ iov = kcalloc(iovnum, sizeof(struct kvec), GFP_KERNEL);
+
+ if (!iov) {
+ usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_MALLOC);
+ return -1;
+ }
+
+ iovnum = 0;
+
+ /* 1. setup usbip_header */
+ setup_ret_submit_pdu(&pdu_header, urb);
+ usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
+ pdu_header.base.seqnum, urb);
+ usbip_header_correct_endian(&pdu_header, 1);
+
+ iov[iovnum].iov_base = &pdu_header;
+ iov[iovnum].iov_len = sizeof(pdu_header);
+ iovnum++;
+ txsize += sizeof(pdu_header);
+
+ /* 2. setup transfer buffer */
+ if (usb_pipein(urb->pipe) &&
+ usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS &&
+ urb->actual_length > 0) {
+ iov[iovnum].iov_base = urb->transfer_buffer;
+ iov[iovnum].iov_len = urb->actual_length;
+ iovnum++;
+ txsize += urb->actual_length;
+ } else if (usb_pipein(urb->pipe) &&
+ usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ /*
+ * For isochronous packets: actual length is the sum of
+ * the actual length of the individual, packets, but as
+ * the packet offsets are not changed there will be
+ * padding between the packets. To optimally use the
+ * bandwidth the padding is not transmitted.
+ */
+
+ int i;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ iov[iovnum].iov_base = urb->transfer_buffer +
+ urb->iso_frame_desc[i].offset;
+ iov[iovnum].iov_len =
+ urb->iso_frame_desc[i].actual_length;
+ iovnum++;
+ txsize += urb->iso_frame_desc[i].actual_length;
+ }
+
+ if (txsize != sizeof(pdu_header) + urb->actual_length) {
+ dev_err(&sdev->interface->dev,
+ "actual length of urb %d does not match iso packet sizes %zu\n",
+ urb->actual_length,
+ txsize-sizeof(pdu_header));
+ kfree(iov);
+ usbip_event_add(&sdev->ud,
+ SDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
+ }
+
+ /* 3. setup iso_packet_descriptor */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ ssize_t len = 0;
+
+ iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
+ if (!iso_buffer) {
+ usbip_event_add(&sdev->ud,
+ SDEV_EVENT_ERROR_MALLOC);
+ kfree(iov);
+ return -1;
+ }
+
+ iov[iovnum].iov_base = iso_buffer;
+ iov[iovnum].iov_len = len;
+ txsize += len;
+ iovnum++;
+ }
+
+ ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
+ iov, iovnum, txsize);
+ if (ret != txsize) {
+ dev_err(&sdev->interface->dev,
+ "sendmsg failed!, retval %d for %zd\n",
+ ret, txsize);
+ kfree(iov);
+ kfree(iso_buffer);
+ usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
+
+ kfree(iov);
+ kfree(iso_buffer);
+
+ total_size += txsize;
+ }
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+ list_for_each_entry_safe(priv, tmp, &sdev->priv_free, list) {
+ stub_free_priv_and_urb(priv);
+ }
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return total_size;
+}
+
+static struct stub_unlink *dequeue_from_unlink_tx(struct stub_device *sdev)
+{
+ unsigned long flags;
+ struct stub_unlink *unlink, *tmp;
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
+ list_move_tail(&unlink->list, &sdev->unlink_free);
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+ return unlink;
+ }
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return NULL;
+}
+
+static int stub_send_ret_unlink(struct stub_device *sdev)
+{
+ unsigned long flags;
+ struct stub_unlink *unlink, *tmp;
+
+ struct msghdr msg;
+ struct kvec iov[1];
+ size_t txsize;
+
+ size_t total_size = 0;
+
+ while ((unlink = dequeue_from_unlink_tx(sdev)) != NULL) {
+ int ret;
+ struct usbip_header pdu_header;
+
+ txsize = 0;
+ memset(&pdu_header, 0, sizeof(pdu_header));
+ memset(&msg, 0, sizeof(msg));
+ memset(&iov, 0, sizeof(iov));
+
+ usbip_dbg_stub_tx("setup ret unlink %lu\n", unlink->seqnum);
+
+ /* 1. setup usbip_header */
+ setup_ret_unlink_pdu(&pdu_header, unlink);
+ usbip_header_correct_endian(&pdu_header, 1);
+
+ iov[0].iov_base = &pdu_header;
+ iov[0].iov_len = sizeof(pdu_header);
+ txsize += sizeof(pdu_header);
+
+ ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
+ 1, txsize);
+ if (ret != txsize) {
+ dev_err(&sdev->interface->dev,
+ "sendmsg failed!, retval %d for %zd\n",
+ ret, txsize);
+ usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
+
+ usbip_dbg_stub_tx("send txdata\n");
+ total_size += txsize;
+ }
+
+ spin_lock_irqsave(&sdev->priv_lock, flags);
+
+ list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free, list) {
+ list_del(&unlink->list);
+ kfree(unlink);
+ }
+
+ spin_unlock_irqrestore(&sdev->priv_lock, flags);
+
+ return total_size;
+}
+
+int stub_tx_loop(void *data)
+{
+ struct usbip_device *ud = data;
+ struct stub_device *sdev = container_of(ud, struct stub_device, ud);
+
+ while (!kthread_should_stop()) {
+ if (usbip_event_happened(ud))
+ break;
+
+ /*
+ * send_ret_submit comes earlier than send_ret_unlink. stub_rx
+ * looks at only priv_init queue. If the completion of a URB is
+ * earlier than the receive of CMD_UNLINK, priv is moved to
+ * priv_tx queue and stub_rx does not find the target priv. In
+ * this case, vhci_rx receives the result of the submit request
+ * and then receives the result of the unlink request. The
+ * result of the submit is given back to the usbcore as the
+ * completion of the unlink request. The request of the
+ * unlink is ignored. This is ok because a driver who calls
+ * usb_unlink_urb() understands the unlink was too late by
+ * getting the status of the given-backed URB which has the
+ * status of usb_submit_urb().
+ */
+ if (stub_send_ret_submit(sdev) < 0)
+ break;
+
+ if (stub_send_ret_unlink(sdev) < 0)
+ break;
+
+ wait_event_interruptible(sdev->tx_waitq,
+ (!list_empty(&sdev->priv_tx) ||
+ !list_empty(&sdev->unlink_tx) ||
+ kthread_should_stop()));
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <asm/byteorder.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <net/sock.h>
+
+#include "usbip_common.h"
+
+#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>"
+#define DRIVER_DESC "USB/IP Core"
+
+#ifdef CONFIG_USBIP_DEBUG
+unsigned long usbip_debug_flag = 0xffffffff;
+#else
+unsigned long usbip_debug_flag;
+#endif
+EXPORT_SYMBOL_GPL(usbip_debug_flag);
+module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)");
+
+/* FIXME */
+struct device_attribute dev_attr_usbip_debug;
+EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
+
+static ssize_t usbip_debug_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%lx\n", usbip_debug_flag);
+}
+
+static ssize_t usbip_debug_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ if (sscanf(buf, "%lx", &usbip_debug_flag) != 1)
+ return -EINVAL;
+ return count;
+}
+DEVICE_ATTR_RW(usbip_debug);
+
+static void usbip_dump_buffer(char *buff, int bufflen)
+{
+ print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4,
+ buff, bufflen, false);
+}
+
+static void usbip_dump_pipe(unsigned int p)
+{
+ unsigned char type = usb_pipetype(p);
+ unsigned char ep = usb_pipeendpoint(p);
+ unsigned char dev = usb_pipedevice(p);
+ unsigned char dir = usb_pipein(p);
+
+ pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT");
+
+ switch (type) {
+ case PIPE_ISOCHRONOUS:
+ pr_debug("ISO\n");
+ break;
+ case PIPE_INTERRUPT:
+ pr_debug("INT\n");
+ break;
+ case PIPE_CONTROL:
+ pr_debug("CTRL\n");
+ break;
+ case PIPE_BULK:
+ pr_debug("BULK\n");
+ break;
+ default:
+ pr_debug("ERR\n");
+ break;
+ }
+}
+
+static void usbip_dump_usb_device(struct usb_device *udev)
+{
+ struct device *dev = &udev->dev;
+ int i;
+
+ dev_dbg(dev, " devnum(%d) devpath(%s) usb speed(%s)",
+ udev->devnum, udev->devpath, usb_speed_string(udev->speed));
+
+ pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport);
+
+ dev_dbg(dev, " ");
+ for (i = 0; i < 16; i++)
+ pr_debug(" %2u", i);
+ pr_debug("\n");
+
+ dev_dbg(dev, " toggle0(IN) :");
+ for (i = 0; i < 16; i++)
+ pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
+ pr_debug("\n");
+
+ dev_dbg(dev, " toggle1(OUT):");
+ for (i = 0; i < 16; i++)
+ pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
+ pr_debug("\n");
+
+ dev_dbg(dev, " epmaxp_in :");
+ for (i = 0; i < 16; i++) {
+ if (udev->ep_in[i])
+ pr_debug(" %2u",
+ le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
+ }
+ pr_debug("\n");
+
+ dev_dbg(dev, " epmaxp_out :");
+ for (i = 0; i < 16; i++) {
+ if (udev->ep_out[i])
+ pr_debug(" %2u",
+ le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
+ }
+ pr_debug("\n");
+
+ dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
+
+ dev_dbg(dev,
+ "descriptor %p, config %p, actconfig %p, rawdescriptors %p\n",
+ &udev->descriptor, udev->config,
+ udev->actconfig, udev->rawdescriptors);
+
+ dev_dbg(dev, "have_langid %d, string_langid %d\n",
+ udev->have_langid, udev->string_langid);
+
+ dev_dbg(dev, "maxchild %d\n", udev->maxchild);
+}
+
+static void usbip_dump_request_type(__u8 rt)
+{
+ switch (rt & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ pr_debug("DEVICE");
+ break;
+ case USB_RECIP_INTERFACE:
+ pr_debug("INTERF");
+ break;
+ case USB_RECIP_ENDPOINT:
+ pr_debug("ENDPOI");
+ break;
+ case USB_RECIP_OTHER:
+ pr_debug("OTHER ");
+ break;
+ default:
+ pr_debug("------");
+ break;
+ }
+}
+
+static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
+{
+ if (!cmd) {
+ pr_debug(" : null pointer\n");
+ return;
+ }
+
+ pr_debug(" ");
+ pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) wLength(%04X) ",
+ cmd->bRequestType, cmd->bRequest,
+ cmd->wValue, cmd->wIndex, cmd->wLength);
+ pr_debug("\n ");
+
+ if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ pr_debug("STANDARD ");
+ switch (cmd->bRequest) {
+ case USB_REQ_GET_STATUS:
+ pr_debug("GET_STATUS\n");
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ pr_debug("CLEAR_FEAT\n");
+ break;
+ case USB_REQ_SET_FEATURE:
+ pr_debug("SET_FEAT\n");
+ break;
+ case USB_REQ_SET_ADDRESS:
+ pr_debug("SET_ADDRRS\n");
+ break;
+ case USB_REQ_GET_DESCRIPTOR:
+ pr_debug("GET_DESCRI\n");
+ break;
+ case USB_REQ_SET_DESCRIPTOR:
+ pr_debug("SET_DESCRI\n");
+ break;
+ case USB_REQ_GET_CONFIGURATION:
+ pr_debug("GET_CONFIG\n");
+ break;
+ case USB_REQ_SET_CONFIGURATION:
+ pr_debug("SET_CONFIG\n");
+ break;
+ case USB_REQ_GET_INTERFACE:
+ pr_debug("GET_INTERF\n");
+ break;
+ case USB_REQ_SET_INTERFACE:
+ pr_debug("SET_INTERF\n");
+ break;
+ case USB_REQ_SYNCH_FRAME:
+ pr_debug("SYNC_FRAME\n");
+ break;
+ default:
+ pr_debug("REQ(%02X)\n", cmd->bRequest);
+ break;
+ }
+ usbip_dump_request_type(cmd->bRequestType);
+ } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {
+ pr_debug("CLASS\n");
+ } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) {
+ pr_debug("VENDOR\n");
+ } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) {
+ pr_debug("RESERVED\n");
+ }
+}
+
+void usbip_dump_urb(struct urb *urb)
+{
+ struct device *dev;
+
+ if (!urb) {
+ pr_debug("urb: null pointer!!\n");
+ return;
+ }
+
+ if (!urb->dev) {
+ pr_debug("urb->dev: null pointer!!\n");
+ return;
+ }
+
+ dev = &urb->dev->dev;
+
+ dev_dbg(dev, " urb :%p\n", urb);
+ dev_dbg(dev, " dev :%p\n", urb->dev);
+
+ usbip_dump_usb_device(urb->dev);
+
+ dev_dbg(dev, " pipe :%08x ", urb->pipe);
+
+ usbip_dump_pipe(urb->pipe);
+
+ dev_dbg(dev, " status :%d\n", urb->status);
+ dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
+ dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
+ dev_dbg(dev, " transfer_buffer_length:%d\n",
+ urb->transfer_buffer_length);
+ dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
+ dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
+
+ if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
+ usbip_dump_usb_ctrlrequest(
+ (struct usb_ctrlrequest *)urb->setup_packet);
+
+ dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
+ dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
+ dev_dbg(dev, " interval :%d\n", urb->interval);
+ dev_dbg(dev, " error_count :%d\n", urb->error_count);
+ dev_dbg(dev, " context :%p\n", urb->context);
+ dev_dbg(dev, " complete :%p\n", urb->complete);
+}
+EXPORT_SYMBOL_GPL(usbip_dump_urb);
+
+void usbip_dump_header(struct usbip_header *pdu)
+{
+ pr_debug("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
+ pdu->base.command,
+ pdu->base.seqnum,
+ pdu->base.devid,
+ pdu->base.direction,
+ pdu->base.ep);
+
+ switch (pdu->base.command) {
+ case USBIP_CMD_SUBMIT:
+ pr_debug("USBIP_CMD_SUBMIT: x_flags %u x_len %u sf %u #p %d iv %d\n",
+ pdu->u.cmd_submit.transfer_flags,
+ pdu->u.cmd_submit.transfer_buffer_length,
+ pdu->u.cmd_submit.start_frame,
+ pdu->u.cmd_submit.number_of_packets,
+ pdu->u.cmd_submit.interval);
+ break;
+ case USBIP_CMD_UNLINK:
+ pr_debug("USBIP_CMD_UNLINK: seq %u\n",
+ pdu->u.cmd_unlink.seqnum);
+ break;
+ case USBIP_RET_SUBMIT:
+ pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n",
+ pdu->u.ret_submit.status,
+ pdu->u.ret_submit.actual_length,
+ pdu->u.ret_submit.start_frame,
+ pdu->u.ret_submit.number_of_packets,
+ pdu->u.ret_submit.error_count);
+ break;
+ case USBIP_RET_UNLINK:
+ pr_debug("USBIP_RET_UNLINK: status %d\n",
+ pdu->u.ret_unlink.status);
+ break;
+ default:
+ /* NOT REACHED */
+ pr_err("unknown command\n");
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(usbip_dump_header);
+
+/* Receive data over TCP/IP. */
+int usbip_recv(struct socket *sock, void *buf, int size)
+{
+ int result;
+ struct msghdr msg;
+ struct kvec iov;
+ int total = 0;
+
+ /* for blocks of if (usbip_dbg_flag_xmit) */
+ char *bp = buf;
+ int osize = size;
+
+ usbip_dbg_xmit("enter\n");
+
+ if (!sock || !buf || !size) {
+ pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf,
+ size);
+ return -EINVAL;
+ }
+
+ do {
+ sock->sk->sk_allocation = GFP_NOIO;
+ iov.iov_base = buf;
+ iov.iov_len = size;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = MSG_NOSIGNAL;
+
+ result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL);
+ if (result <= 0) {
+ pr_debug("receive sock %p buf %p size %u ret %d total %d\n",
+ sock, buf, size, result, total);
+ goto err;
+ }
+
+ size -= result;
+ buf += result;
+ total += result;
+ } while (size > 0);
+
+ if (usbip_dbg_flag_xmit) {
+ if (!in_interrupt())
+ pr_debug("%-10s:", current->comm);
+ else
+ pr_debug("interrupt :");
+
+ pr_debug("receiving....\n");
+ usbip_dump_buffer(bp, osize);
+ pr_debug("received, osize %d ret %d size %d total %d\n",
+ osize, result, size, total);
+ }
+
+ return total;
+
+err:
+ return result;
+}
+EXPORT_SYMBOL_GPL(usbip_recv);
+
+/* there may be more cases to tweak the flags. */
+static unsigned int tweak_transfer_flags(unsigned int flags)
+{
+ flags &= ~URB_NO_TRANSFER_DMA_MAP;
+ return flags;
+}
+
+static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
+ int pack)
+{
+ struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
+
+ /*
+ * Some members are not still implemented in usbip. I hope this issue
+ * will be discussed when usbip is ported to other operating systems.
+ */
+ if (pack) {
+ spdu->transfer_flags =
+ tweak_transfer_flags(urb->transfer_flags);
+ spdu->transfer_buffer_length = urb->transfer_buffer_length;
+ spdu->start_frame = urb->start_frame;
+ spdu->number_of_packets = urb->number_of_packets;
+ spdu->interval = urb->interval;
+ } else {
+ urb->transfer_flags = spdu->transfer_flags;
+ urb->transfer_buffer_length = spdu->transfer_buffer_length;
+ urb->start_frame = spdu->start_frame;
+ urb->number_of_packets = spdu->number_of_packets;
+ urb->interval = spdu->interval;
+ }
+}
+
+static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
+ int pack)
+{
+ struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
+
+ if (pack) {
+ rpdu->status = urb->status;
+ rpdu->actual_length = urb->actual_length;
+ rpdu->start_frame = urb->start_frame;
+ rpdu->number_of_packets = urb->number_of_packets;
+ rpdu->error_count = urb->error_count;
+ } else {
+ urb->status = rpdu->status;
+ urb->actual_length = rpdu->actual_length;
+ urb->start_frame = rpdu->start_frame;
+ urb->number_of_packets = rpdu->number_of_packets;
+ urb->error_count = rpdu->error_count;
+ }
+}
+
+void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
+ int pack)
+{
+ switch (cmd) {
+ case USBIP_CMD_SUBMIT:
+ usbip_pack_cmd_submit(pdu, urb, pack);
+ break;
+ case USBIP_RET_SUBMIT:
+ usbip_pack_ret_submit(pdu, urb, pack);
+ break;
+ default:
+ /* NOT REACHED */
+ pr_err("unknown command\n");
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(usbip_pack_pdu);
+
+static void correct_endian_basic(struct usbip_header_basic *base, int send)
+{
+ if (send) {
+ base->command = cpu_to_be32(base->command);
+ base->seqnum = cpu_to_be32(base->seqnum);
+ base->devid = cpu_to_be32(base->devid);
+ base->direction = cpu_to_be32(base->direction);
+ base->ep = cpu_to_be32(base->ep);
+ } else {
+ base->command = be32_to_cpu(base->command);
+ base->seqnum = be32_to_cpu(base->seqnum);
+ base->devid = be32_to_cpu(base->devid);
+ base->direction = be32_to_cpu(base->direction);
+ base->ep = be32_to_cpu(base->ep);
+ }
+}
+
+static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
+ int send)
+{
+ if (send) {
+ pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
+
+ cpu_to_be32s(&pdu->transfer_buffer_length);
+ cpu_to_be32s(&pdu->start_frame);
+ cpu_to_be32s(&pdu->number_of_packets);
+ cpu_to_be32s(&pdu->interval);
+ } else {
+ pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
+
+ be32_to_cpus(&pdu->transfer_buffer_length);
+ be32_to_cpus(&pdu->start_frame);
+ be32_to_cpus(&pdu->number_of_packets);
+ be32_to_cpus(&pdu->interval);
+ }
+}
+
+static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
+ int send)
+{
+ if (send) {
+ cpu_to_be32s(&pdu->status);
+ cpu_to_be32s(&pdu->actual_length);
+ cpu_to_be32s(&pdu->start_frame);
+ cpu_to_be32s(&pdu->number_of_packets);
+ cpu_to_be32s(&pdu->error_count);
+ } else {
+ be32_to_cpus(&pdu->status);
+ be32_to_cpus(&pdu->actual_length);
+ be32_to_cpus(&pdu->start_frame);
+ be32_to_cpus(&pdu->number_of_packets);
+ be32_to_cpus(&pdu->error_count);
+ }
+}
+
+static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
+ int send)
+{
+ if (send)
+ pdu->seqnum = cpu_to_be32(pdu->seqnum);
+ else
+ pdu->seqnum = be32_to_cpu(pdu->seqnum);
+}
+
+static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
+ int send)
+{
+ if (send)
+ cpu_to_be32s(&pdu->status);
+ else
+ be32_to_cpus(&pdu->status);
+}
+
+void usbip_header_correct_endian(struct usbip_header *pdu, int send)
+{
+ __u32 cmd = 0;
+
+ if (send)
+ cmd = pdu->base.command;
+
+ correct_endian_basic(&pdu->base, send);
+
+ if (!send)
+ cmd = pdu->base.command;
+
+ switch (cmd) {
+ case USBIP_CMD_SUBMIT:
+ correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
+ break;
+ case USBIP_RET_SUBMIT:
+ correct_endian_ret_submit(&pdu->u.ret_submit, send);
+ break;
+ case USBIP_CMD_UNLINK:
+ correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
+ break;
+ case USBIP_RET_UNLINK:
+ correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
+ break;
+ default:
+ /* NOT REACHED */
+ pr_err("unknown command\n");
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
+
+static void usbip_iso_packet_correct_endian(
+ struct usbip_iso_packet_descriptor *iso, int send)
+{
+ /* does not need all members. but copy all simply. */
+ if (send) {
+ iso->offset = cpu_to_be32(iso->offset);
+ iso->length = cpu_to_be32(iso->length);
+ iso->status = cpu_to_be32(iso->status);
+ iso->actual_length = cpu_to_be32(iso->actual_length);
+ } else {
+ iso->offset = be32_to_cpu(iso->offset);
+ iso->length = be32_to_cpu(iso->length);
+ iso->status = be32_to_cpu(iso->status);
+ iso->actual_length = be32_to_cpu(iso->actual_length);
+ }
+}
+
+static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
+ struct usb_iso_packet_descriptor *uiso, int pack)
+{
+ if (pack) {
+ iso->offset = uiso->offset;
+ iso->length = uiso->length;
+ iso->status = uiso->status;
+ iso->actual_length = uiso->actual_length;
+ } else {
+ uiso->offset = iso->offset;
+ uiso->length = iso->length;
+ uiso->status = iso->status;
+ uiso->actual_length = iso->actual_length;
+ }
+}
+
+/* must free buffer */
+struct usbip_iso_packet_descriptor*
+usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
+{
+ struct usbip_iso_packet_descriptor *iso;
+ int np = urb->number_of_packets;
+ ssize_t size = np * sizeof(*iso);
+ int i;
+
+ iso = kzalloc(size, GFP_KERNEL);
+ if (!iso)
+ return NULL;
+
+ for (i = 0; i < np; i++) {
+ usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1);
+ usbip_iso_packet_correct_endian(&iso[i], 1);
+ }
+
+ *bufflen = size;
+
+ return iso;
+}
+EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
+
+/* some members of urb must be substituted before. */
+int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
+{
+ void *buff;
+ struct usbip_iso_packet_descriptor *iso;
+ int np = urb->number_of_packets;
+ int size = np * sizeof(*iso);
+ int i;
+ int ret;
+ int total_length = 0;
+
+ if (!usb_pipeisoc(urb->pipe))
+ return 0;
+
+ /* my Bluetooth dongle gets ISO URBs which are np = 0 */
+ if (np == 0)
+ return 0;
+
+ buff = kzalloc(size, GFP_KERNEL);
+ if (!buff)
+ return -ENOMEM;
+
+ ret = usbip_recv(ud->tcp_socket, buff, size);
+ if (ret != size) {
+ dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
+ ret);
+ kfree(buff);
+
+ if (ud->side == USBIP_STUB)
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ else
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+
+ return -EPIPE;
+ }
+
+ iso = (struct usbip_iso_packet_descriptor *) buff;
+ for (i = 0; i < np; i++) {
+ usbip_iso_packet_correct_endian(&iso[i], 0);
+ usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0);
+ total_length += urb->iso_frame_desc[i].actual_length;
+ }
+
+ kfree(buff);
+
+ if (total_length != urb->actual_length) {
+ dev_err(&urb->dev->dev,
+ "total length of iso packets %d not equal to actual length of buffer %d\n",
+ total_length, urb->actual_length);
+
+ if (ud->side == USBIP_STUB)
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ else
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+
+ return -EPIPE;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usbip_recv_iso);
+
+/*
+ * This functions restores the padding which was removed for optimizing
+ * the bandwidth during transfer over tcp/ip
+ *
+ * buffer and iso packets need to be stored and be in propeper endian in urb
+ * before calling this function
+ */
+void usbip_pad_iso(struct usbip_device *ud, struct urb *urb)
+{
+ int np = urb->number_of_packets;
+ int i;
+ int actualoffset = urb->actual_length;
+
+ if (!usb_pipeisoc(urb->pipe))
+ return;
+
+ /* if no packets or length of data is 0, then nothing to unpack */
+ if (np == 0 || urb->actual_length == 0)
+ return;
+
+ /*
+ * if actual_length is transfer_buffer_length then no padding is
+ * present.
+ */
+ if (urb->actual_length == urb->transfer_buffer_length)
+ return;
+
+ /*
+ * loop over all packets from last to first (to prevent overwritting
+ * memory when padding) and move them into the proper place
+ */
+ for (i = np-1; i > 0; i--) {
+ actualoffset -= urb->iso_frame_desc[i].actual_length;
+ memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset,
+ urb->transfer_buffer + actualoffset,
+ urb->iso_frame_desc[i].actual_length);
+ }
+}
+EXPORT_SYMBOL_GPL(usbip_pad_iso);
+
+/* some members of urb must be substituted before. */
+int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
+{
+ int ret;
+ int size;
+
+ if (ud->side == USBIP_STUB) {
+ /* the direction of urb must be OUT. */
+ if (usb_pipein(urb->pipe))
+ return 0;
+
+ size = urb->transfer_buffer_length;
+ } else {
+ /* the direction of urb must be IN. */
+ if (usb_pipeout(urb->pipe))
+ return 0;
+
+ size = urb->actual_length;
+ }
+
+ /* no need to recv xbuff */
+ if (!(size > 0))
+ return 0;
+
+ ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
+ if (ret != size) {
+ dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
+ if (ud->side == USBIP_STUB) {
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ } else {
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ return -EPIPE;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
+
+static int __init usbip_core_init(void)
+{
+ pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
+ return 0;
+}
+
+static void __exit usbip_core_exit(void)
+{
+ return;
+}
+
+module_init(usbip_core_init);
+module_exit(usbip_core_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(USBIP_VERSION);
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#ifndef __USBIP_COMMON_H
+#define __USBIP_COMMON_H
+
+#include <linux/compiler.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/net.h>
+#include <linux/printk.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/usb.h>
+#include <linux/wait.h>
+#include <uapi/linux/usbip.h>
+
+#define USBIP_VERSION "1.0.0"
+
+#undef pr_fmt
+
+#ifdef DEBUG
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s:%d: " fmt, __func__, __LINE__
+#else
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#endif
+
+enum {
+ usbip_debug_xmit = (1 << 0),
+ usbip_debug_sysfs = (1 << 1),
+ usbip_debug_urb = (1 << 2),
+ usbip_debug_eh = (1 << 3),
+
+ usbip_debug_stub_cmp = (1 << 8),
+ usbip_debug_stub_dev = (1 << 9),
+ usbip_debug_stub_rx = (1 << 10),
+ usbip_debug_stub_tx = (1 << 11),
+
+ usbip_debug_vhci_rh = (1 << 8),
+ usbip_debug_vhci_hc = (1 << 9),
+ usbip_debug_vhci_rx = (1 << 10),
+ usbip_debug_vhci_tx = (1 << 11),
+ usbip_debug_vhci_sysfs = (1 << 12)
+};
+
+#define usbip_dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
+#define usbip_dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
+#define usbip_dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
+#define usbip_dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
+#define usbip_dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
+#define usbip_dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
+#define usbip_dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
+#define usbip_dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
+
+extern unsigned long usbip_debug_flag;
+extern struct device_attribute dev_attr_usbip_debug;
+
+#define usbip_dbg_with_flag(flag, fmt, args...) \
+ do { \
+ if (flag & usbip_debug_flag) \
+ pr_debug(fmt, ##args); \
+ } while (0)
+
+#define usbip_dbg_sysfs(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
+#define usbip_dbg_xmit(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_xmit, fmt , ##args)
+#define usbip_dbg_urb(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_urb, fmt , ##args)
+#define usbip_dbg_eh(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_eh, fmt , ##args)
+
+#define usbip_dbg_vhci_rh(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
+#define usbip_dbg_vhci_hc(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
+#define usbip_dbg_vhci_rx(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
+#define usbip_dbg_vhci_tx(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
+#define usbip_dbg_vhci_sysfs(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
+
+#define usbip_dbg_stub_cmp(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
+#define usbip_dbg_stub_rx(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
+#define usbip_dbg_stub_tx(fmt, args...) \
+ usbip_dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
+
+/*
+ * USB/IP request headers
+ *
+ * Each request is transferred across the network to its counterpart, which
+ * facilitates the normal USB communication. The values contained in the headers
+ * are basically the same as in a URB. Currently, four request types are
+ * defined:
+ *
+ * - USBIP_CMD_SUBMIT: a USB request block, corresponds to usb_submit_urb()
+ * (client to server)
+ *
+ * - USBIP_RET_SUBMIT: the result of USBIP_CMD_SUBMIT
+ * (server to client)
+ *
+ * - USBIP_CMD_UNLINK: an unlink request of a pending USBIP_CMD_SUBMIT,
+ * corresponds to usb_unlink_urb()
+ * (client to server)
+ *
+ * - USBIP_RET_UNLINK: the result of USBIP_CMD_UNLINK
+ * (server to client)
+ *
+ */
+#define USBIP_CMD_SUBMIT 0x0001
+#define USBIP_CMD_UNLINK 0x0002
+#define USBIP_RET_SUBMIT 0x0003
+#define USBIP_RET_UNLINK 0x0004
+
+#define USBIP_DIR_OUT 0x00
+#define USBIP_DIR_IN 0x01
+
+/**
+ * struct usbip_header_basic - data pertinent to every request
+ * @command: the usbip request type
+ * @seqnum: sequential number that identifies requests; incremented per
+ * connection
+ * @devid: specifies a remote USB device uniquely instead of busnum and devnum;
+ * in the stub driver, this value is ((busnum << 16) | devnum)
+ * @direction: direction of the transfer
+ * @ep: endpoint number
+ */
+struct usbip_header_basic {
+ __u32 command;
+ __u32 seqnum;
+ __u32 devid;
+ __u32 direction;
+ __u32 ep;
+} __packed;
+
+/**
+ * struct usbip_header_cmd_submit - USBIP_CMD_SUBMIT packet header
+ * @transfer_flags: URB flags
+ * @transfer_buffer_length: the data size for (in) or (out) transfer
+ * @start_frame: initial frame for isochronous or interrupt transfers
+ * @number_of_packets: number of isochronous packets
+ * @interval: maximum time for the request on the server-side host controller
+ * @setup: setup data for a control request
+ */
+struct usbip_header_cmd_submit {
+ __u32 transfer_flags;
+ __s32 transfer_buffer_length;
+
+ /* it is difficult for usbip to sync frames (reserved only?) */
+ __s32 start_frame;
+ __s32 number_of_packets;
+ __s32 interval;
+
+ unsigned char setup[8];
+} __packed;
+
+/**
+ * struct usbip_header_ret_submit - USBIP_RET_SUBMIT packet header
+ * @status: return status of a non-iso request
+ * @actual_length: number of bytes transferred
+ * @start_frame: initial frame for isochronous or interrupt transfers
+ * @number_of_packets: number of isochronous packets
+ * @error_count: number of errors for isochronous transfers
+ */
+struct usbip_header_ret_submit {
+ __s32 status;
+ __s32 actual_length;
+ __s32 start_frame;
+ __s32 number_of_packets;
+ __s32 error_count;
+} __packed;
+
+/**
+ * struct usbip_header_cmd_unlink - USBIP_CMD_UNLINK packet header
+ * @seqnum: the URB seqnum to unlink
+ */
+struct usbip_header_cmd_unlink {
+ __u32 seqnum;
+} __packed;
+
+/**
+ * struct usbip_header_ret_unlink - USBIP_RET_UNLINK packet header
+ * @status: return status of the request
+ */
+struct usbip_header_ret_unlink {
+ __s32 status;
+} __packed;
+
+/**
+ * struct usbip_header - common header for all usbip packets
+ * @base: the basic header
+ * @u: packet type dependent header
+ */
+struct usbip_header {
+ struct usbip_header_basic base;
+
+ union {
+ struct usbip_header_cmd_submit cmd_submit;
+ struct usbip_header_ret_submit ret_submit;
+ struct usbip_header_cmd_unlink cmd_unlink;
+ struct usbip_header_ret_unlink ret_unlink;
+ } u;
+} __packed;
+
+/*
+ * This is the same as usb_iso_packet_descriptor but packed for pdu.
+ */
+struct usbip_iso_packet_descriptor {
+ __u32 offset;
+ __u32 length; /* expected length */
+ __u32 actual_length;
+ __u32 status;
+} __packed;
+
+enum usbip_side {
+ USBIP_VHCI,
+ USBIP_STUB,
+};
+
+/* event handler */
+#define USBIP_EH_SHUTDOWN (1 << 0)
+#define USBIP_EH_BYE (1 << 1)
+#define USBIP_EH_RESET (1 << 2)
+#define USBIP_EH_UNUSABLE (1 << 3)
+
+#define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
+#define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+
+#define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
+#define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+
+/* a common structure for stub_device and vhci_device */
+struct usbip_device {
+ enum usbip_side side;
+ enum usbip_device_status status;
+
+ /* lock for status */
+ spinlock_t lock;
+
+ struct socket *tcp_socket;
+
+ struct task_struct *tcp_rx;
+ struct task_struct *tcp_tx;
+
+ unsigned long event;
+ struct task_struct *eh;
+ wait_queue_head_t eh_waitq;
+
+ struct eh_ops {
+ void (*shutdown)(struct usbip_device *);
+ void (*reset)(struct usbip_device *);
+ void (*unusable)(struct usbip_device *);
+ } eh_ops;
+};
+
+#define kthread_get_run(threadfn, data, namefmt, ...) \
+({ \
+ struct task_struct *__k \
+ = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
+ if (!IS_ERR(__k)) { \
+ get_task_struct(__k); \
+ wake_up_process(__k); \
+ } \
+ __k; \
+})
+
+#define kthread_stop_put(k) \
+ do { \
+ kthread_stop(k); \
+ put_task_struct(k); \
+ } while (0)
+
+/* usbip_common.c */
+void usbip_dump_urb(struct urb *purb);
+void usbip_dump_header(struct usbip_header *pdu);
+
+int usbip_recv(struct socket *sock, void *buf, int size);
+
+void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
+ int pack);
+void usbip_header_correct_endian(struct usbip_header *pdu, int send);
+
+struct usbip_iso_packet_descriptor*
+usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
+
+/* some members of urb must be substituted before. */
+int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
+void usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
+int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
+
+/* usbip_event.c */
+int usbip_start_eh(struct usbip_device *ud);
+void usbip_stop_eh(struct usbip_device *ud);
+void usbip_event_add(struct usbip_device *ud, unsigned long event);
+int usbip_event_happened(struct usbip_device *ud);
+
+static inline int interface_to_busnum(struct usb_interface *interface)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+
+ return udev->bus->busnum;
+}
+
+static inline int interface_to_devnum(struct usb_interface *interface)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+
+ return udev->devnum;
+}
+
+#endif /* __USBIP_COMMON_H */
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/export.h>
+
+#include "usbip_common.h"
+
+static int event_handler(struct usbip_device *ud)
+{
+ usbip_dbg_eh("enter\n");
+
+ /*
+ * Events are handled by only this thread.
+ */
+ while (usbip_event_happened(ud)) {
+ usbip_dbg_eh("pending event %lx\n", ud->event);
+
+ /*
+ * NOTE: shutdown must come first.
+ * Shutdown the device.
+ */
+ if (ud->event & USBIP_EH_SHUTDOWN) {
+ ud->eh_ops.shutdown(ud);
+ ud->event &= ~USBIP_EH_SHUTDOWN;
+ }
+
+ /* Reset the device. */
+ if (ud->event & USBIP_EH_RESET) {
+ ud->eh_ops.reset(ud);
+ ud->event &= ~USBIP_EH_RESET;
+ }
+
+ /* Mark the device as unusable. */
+ if (ud->event & USBIP_EH_UNUSABLE) {
+ ud->eh_ops.unusable(ud);
+ ud->event &= ~USBIP_EH_UNUSABLE;
+ }
+
+ /* Stop the error handler. */
+ if (ud->event & USBIP_EH_BYE)
+ return -1;
+ }
+
+ return 0;
+}
+
+static int event_handler_loop(void *data)
+{
+ struct usbip_device *ud = data;
+
+ while (!kthread_should_stop()) {
+ wait_event_interruptible(ud->eh_waitq,
+ usbip_event_happened(ud) ||
+ kthread_should_stop());
+ usbip_dbg_eh("wakeup\n");
+
+ if (event_handler(ud) < 0)
+ break;
+ }
+
+ return 0;
+}
+
+int usbip_start_eh(struct usbip_device *ud)
+{
+ init_waitqueue_head(&ud->eh_waitq);
+ ud->event = 0;
+
+ ud->eh = kthread_run(event_handler_loop, ud, "usbip_eh");
+ if (IS_ERR(ud->eh)) {
+ pr_warn("Unable to start control thread\n");
+ return PTR_ERR(ud->eh);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usbip_start_eh);
+
+void usbip_stop_eh(struct usbip_device *ud)
+{
+ if (ud->eh == current)
+ return; /* do not wait for myself */
+
+ kthread_stop(ud->eh);
+ usbip_dbg_eh("usbip_eh has finished\n");
+}
+EXPORT_SYMBOL_GPL(usbip_stop_eh);
+
+void usbip_event_add(struct usbip_device *ud, unsigned long event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ud->lock, flags);
+ ud->event |= event;
+ wake_up(&ud->eh_waitq);
+ spin_unlock_irqrestore(&ud->lock, flags);
+}
+EXPORT_SYMBOL_GPL(usbip_event_add);
+
+int usbip_event_happened(struct usbip_device *ud)
+{
+ int happened = 0;
+
+ spin_lock(&ud->lock);
+ if (ud->event != 0)
+ happened = 1;
+ spin_unlock(&ud->lock);
+
+ return happened;
+}
+EXPORT_SYMBOL_GPL(usbip_event_happened);
--- /dev/null
+PRELIMINARY DRAFT, MAY CONTAIN MISTAKES!
+28 Jun 2011
+
+The USB/IP protocol follows a server/client architecture. The server exports the
+USB devices and the clients imports them. The device driver for the exported
+USB device runs on the client machine.
+
+The client may ask for the list of the exported USB devices. To get the list the
+client opens a TCP/IP connection towards the server, and sends an OP_REQ_DEVLIST
+packet on top of the TCP/IP connection (so the actual OP_REQ_DEVLIST may be sent
+in one or more pieces at the low level transport layer). The server sends back
+the OP_REP_DEVLIST packet which lists the exported USB devices. Finally the
+TCP/IP connection is closed.
+
+ virtual host controller usb host
+ "client" "server"
+ (imports USB devices) (exports USB devices)
+ | |
+ | OP_REQ_DEVLIST |
+ | ----------------------------------------------> |
+ | |
+ | OP_REP_DEVLIST |
+ | <---------------------------------------------- |
+ | |
+
+Once the client knows the list of exported USB devices it may decide to use one
+of them. First the client opens a TCP/IP connection towards the server and
+sends an OP_REQ_IMPORT packet. The server replies with OP_REP_IMPORT. If the
+import was successful the TCP/IP connection remains open and will be used
+to transfer the URB traffic between the client and the server. The client may
+send two types of packets: the USBIP_CMD_SUBMIT to submit an URB, and
+USBIP_CMD_UNLINK to unlink a previously submitted URB. The answers of the
+server may be USBIP_RET_SUBMIT and USBIP_RET_UNLINK respectively.
+
+ virtual host controller usb host
+ "client" "server"
+ (imports USB devices) (exports USB devices)
+ | |
+ | OP_REQ_IMPORT |
+ | ----------------------------------------------> |
+ | |
+ | OP_REP_IMPORT |
+ | <---------------------------------------------- |
+ | |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = n) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_RET_SUBMIT(seqnum = n) |
+ | <---------------------------------------------- |
+ | . |
+ | : |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = m) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = m+1) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = m+2) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_RET_SUBMIT(seqnum = m) |
+ | <---------------------------------------------- |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = m+3) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_RET_SUBMIT(seqnum = m+1) |
+ | <---------------------------------------------- |
+ | |
+ | USBIP_CMD_SUBMIT(seqnum = m+4) |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_RET_SUBMIT(seqnum = m+2) |
+ | <---------------------------------------------- |
+ | . |
+ | : |
+ | |
+ | USBIP_CMD_UNLINK |
+ | ----------------------------------------------> |
+ | |
+ | USBIP_RET_UNLINK |
+ | <---------------------------------------------- |
+ | |
+
+The fields are in network (big endian) byte order meaning that the most significant
+byte (MSB) is stored at the lowest address.
+
+
+OP_REQ_DEVLIST: Retrieve the list of exported USB devices.
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
+-----------+--------+------------+---------------------------------------------------
+ 2 | 2 | 0x8005 | Command code: Retrieve the list of exported USB
+ | | | devices.
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | 0x00000000 | Status: unused, shall be set to 0
+
+OP_REP_DEVLIST: Reply with the list of exported USB devices.
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0.
+-----------+--------+------------+---------------------------------------------------
+ 2 | 2 | 0x0005 | Reply code: The list of exported USB devices.
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | 0x00000000 | Status: 0 for OK
+-----------+--------+------------+---------------------------------------------------
+ 8 | 4 | n | Number of exported devices: 0 means no exported
+ | | | devices.
+-----------+--------+------------+---------------------------------------------------
+ 0x0C | | | From now on the exported n devices are described,
+ | | | if any. If no devices are exported the message
+ | | | ends with the previous "number of exported
+ | | | devices" field.
+-----------+--------+------------+---------------------------------------------------
+ | 256 | | path: Path of the device on the host exporting the
+ | | | USB device, string closed with zero byte, e.g.
+ | | | "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-2"
+ | | | The unused bytes shall be filled with zero
+ | | | bytes.
+-----------+--------+------------+---------------------------------------------------
+ 0x10C | 32 | | busid: Bus ID of the exported device, string
+ | | | closed with zero byte, e.g. "3-2". The unused
+ | | | bytes shall be filled with zero bytes.
+-----------+--------+------------+---------------------------------------------------
+ 0x12C | 4 | | busnum
+-----------+--------+------------+---------------------------------------------------
+ 0x130 | 4 | | devnum
+-----------+--------+------------+---------------------------------------------------
+ 0x134 | 4 | | speed
+-----------+--------+------------+---------------------------------------------------
+ 0x138 | 2 | | idVendor
+-----------+--------+------------+---------------------------------------------------
+ 0x13A | 2 | | idProduct
+-----------+--------+------------+---------------------------------------------------
+ 0x13C | 2 | | bcdDevice
+-----------+--------+------------+---------------------------------------------------
+ 0x13E | 1 | | bDeviceClass
+-----------+--------+------------+---------------------------------------------------
+ 0x13F | 1 | | bDeviceSubClass
+-----------+--------+------------+---------------------------------------------------
+ 0x140 | 1 | | bDeviceProtocol
+-----------+--------+------------+---------------------------------------------------
+ 0x141 | 1 | | bConfigurationValue
+-----------+--------+------------+---------------------------------------------------
+ 0x142 | 1 | | bNumConfigurations
+-----------+--------+------------+---------------------------------------------------
+ 0x143 | 1 | | bNumInterfaces
+-----------+--------+------------+---------------------------------------------------
+ 0x144 | | m_0 | From now on each interface is described, all
+ | | | together bNumInterfaces times, with the
+ | | | the following 4 fields:
+-----------+--------+------------+---------------------------------------------------
+ | 1 | | bInterfaceClass
+-----------+--------+------------+---------------------------------------------------
+ 0x145 | 1 | | bInterfaceSubClass
+-----------+--------+------------+---------------------------------------------------
+ 0x146 | 1 | | bInterfaceProtocol
+-----------+--------+------------+---------------------------------------------------
+ 0x147 | 1 | | padding byte for alignment, shall be set to zero
+-----------+--------+------------+---------------------------------------------------
+ 0xC + | | | The second exported USB device starts at i=1
+ i*0x138 + | | | with the busid field.
+ m_(i-1)*4 | | |
+
+OP_REQ_IMPORT: Request to import (attach) a remote USB device.
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
+-----------+--------+------------+---------------------------------------------------
+ 2 | 2 | 0x8003 | Command code: import a remote USB device.
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | 0x00000000 | Status: unused, shall be set to 0
+-----------+--------+------------+---------------------------------------------------
+ 8 | 32 | | busid: the busid of the exported device on the
+ | | | remote host. The possible values are taken
+ | | | from the message field OP_REP_DEVLIST.busid.
+ | | | A string closed with zero, the unused bytes
+ | | | shall be filled with zeros.
+-----------+--------+------------+---------------------------------------------------
+
+OP_REP_IMPORT: Reply to import (attach) a remote USB device.
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 2 | 0x0100 | Binary-coded decimal USBIP version number: v1.0.0
+-----------+--------+------------+---------------------------------------------------
+ 2 | 2 | 0x0003 | Reply code: Reply to import.
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | 0x00000000 | Status: 0 for OK
+ | | | 1 for error
+-----------+--------+------------+---------------------------------------------------
+ 8 | | | From now on comes the details of the imported
+ | | | device, if the previous status field was OK (0),
+ | | | otherwise the reply ends with the status field.
+-----------+--------+------------+---------------------------------------------------
+ | 256 | | path: Path of the device on the host exporting the
+ | | | USB device, string closed with zero byte, e.g.
+ | | | "/sys/devices/pci0000:00/0000:00:1d.1/usb3/3-2"
+ | | | The unused bytes shall be filled with zero
+ | | | bytes.
+-----------+--------+------------+---------------------------------------------------
+ 0x108 | 32 | | busid: Bus ID of the exported device, string
+ | | | closed with zero byte, e.g. "3-2". The unused
+ | | | bytes shall be filled with zero bytes.
+-----------+--------+------------+---------------------------------------------------
+ 0x128 | 4 | | busnum
+-----------+--------+------------+---------------------------------------------------
+ 0x12C | 4 | | devnum
+-----------+--------+------------+---------------------------------------------------
+ 0x130 | 4 | | speed
+-----------+--------+------------+---------------------------------------------------
+ 0x134 | 2 | | idVendor
+-----------+--------+------------+---------------------------------------------------
+ 0x136 | 2 | | idProduct
+-----------+--------+------------+---------------------------------------------------
+ 0x138 | 2 | | bcdDevice
+-----------+--------+------------+---------------------------------------------------
+ 0x139 | 1 | | bDeviceClass
+-----------+--------+------------+---------------------------------------------------
+ 0x13A | 1 | | bDeviceSubClass
+-----------+--------+------------+---------------------------------------------------
+ 0x13B | 1 | | bDeviceProtocol
+-----------+--------+------------+---------------------------------------------------
+ 0x13C | 1 | | bConfigurationValue
+-----------+--------+------------+---------------------------------------------------
+ 0x13D | 1 | | bNumConfigurations
+-----------+--------+------------+---------------------------------------------------
+ 0x13E | 1 | | bNumInterfaces
+
+USBIP_CMD_SUBMIT: Submit an URB
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 4 | 0x00000001 | command: Submit an URB
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | | seqnum: the sequence number of the URB to submit
+-----------+--------+------------+---------------------------------------------------
+ 8 | 4 | | devid
+-----------+--------+------------+---------------------------------------------------
+ 0xC | 4 | | direction: 0: USBIP_DIR_OUT
+ | | | 1: USBIP_DIR_IN
+-----------+--------+------------+---------------------------------------------------
+ 0x10 | 4 | | ep: endpoint number, possible values are: 0...15
+-----------+--------+------------+---------------------------------------------------
+ 0x14 | 4 | | transfer_flags: possible values depend on the
+ | | | URB transfer type, see below
+-----------+--------+------------+---------------------------------------------------
+ 0x18 | 4 | | transfer_buffer_length
+-----------+--------+------------+---------------------------------------------------
+ 0x1C | 4 | | start_frame: specify the selected frame to
+ | | | transmit an ISO frame, ignored if URB_ISO_ASAP
+ | | | is specified at transfer_flags
+-----------+--------+------------+---------------------------------------------------
+ 0x20 | 4 | | number_of_packets: number of ISO packets
+-----------+--------+------------+---------------------------------------------------
+ 0x24 | 4 | | interval: maximum time for the request on the
+ | | | server-side host controller
+-----------+--------+------------+---------------------------------------------------
+ 0x28 | 8 | | setup: data bytes for USB setup, filled with
+ | | | zeros if not used
+-----------+--------+------------+---------------------------------------------------
+ 0x30 | | | URB data. For ISO transfers the padding between
+ | | | each ISO packets is not transmitted.
+
+
+ Allowed transfer_flags | value | control | interrupt | bulk | isochronous
+ -------------------------+------------+---------+-----------+----------+-------------
+ URB_SHORT_NOT_OK | 0x00000001 | only in | only in | only in | no
+ URB_ISO_ASAP | 0x00000002 | no | no | no | yes
+ URB_NO_TRANSFER_DMA_MAP | 0x00000004 | yes | yes | yes | yes
+ URB_NO_FSBR | 0x00000020 | yes | no | no | no
+ URB_ZERO_PACKET | 0x00000040 | no | no | only out | no
+ URB_NO_INTERRUPT | 0x00000080 | yes | yes | yes | yes
+ URB_FREE_BUFFER | 0x00000100 | yes | yes | yes | yes
+ URB_DIR_MASK | 0x00000200 | yes | yes | yes | yes
+
+
+USBIP_RET_SUBMIT: Reply for submitting an URB
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 4 | 0x00000003 | command
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | | seqnum: URB sequence number
+-----------+--------+------------+---------------------------------------------------
+ 8 | 4 | | devid
+-----------+--------+------------+---------------------------------------------------
+ 0xC | 4 | | direction: 0: USBIP_DIR_OUT
+ | | | 1: USBIP_DIR_IN
+-----------+--------+------------+---------------------------------------------------
+ 0x10 | 4 | | ep: endpoint number
+-----------+--------+------------+---------------------------------------------------
+ 0x14 | 4 | | status: zero for successful URB transaction,
+ | | | otherwise some kind of error happened.
+-----------+--------+------------+---------------------------------------------------
+ 0x18 | 4 | n | actual_length: number of URB data bytes
+-----------+--------+------------+---------------------------------------------------
+ 0x1C | 4 | | start_frame: for an ISO frame the actually
+ | | | selected frame for transmit.
+-----------+--------+------------+---------------------------------------------------
+ 0x20 | 4 | | number_of_packets
+-----------+--------+------------+---------------------------------------------------
+ 0x24 | 4 | | error_count
+-----------+--------+------------+---------------------------------------------------
+ 0x28 | 8 | | setup: data bytes for USB setup, filled with
+ | | | zeros if not used
+-----------+--------+------------+---------------------------------------------------
+ 0x30 | n | | URB data bytes. For ISO transfers the padding
+ | | | between each ISO packets is not transmitted.
+
+USBIP_CMD_UNLINK: Unlink an URB
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 4 | 0x00000002 | command: URB unlink command
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | | seqnum: URB sequence number to unlink: FIXME: is this so?
+-----------+--------+------------+---------------------------------------------------
+ 8 | 4 | | devid
+-----------+--------+------------+---------------------------------------------------
+ 0xC | 4 | | direction: 0: USBIP_DIR_OUT
+ | | | 1: USBIP_DIR_IN
+-----------+--------+------------+---------------------------------------------------
+ 0x10 | 4 | | ep: endpoint number: zero
+-----------+--------+------------+---------------------------------------------------
+ 0x14 | 4 | | seqnum: the URB sequence number given previously
+ | | | at USBIP_CMD_SUBMIT.seqnum field
+-----------+--------+------------+---------------------------------------------------
+ 0x30 | n | | URB data bytes. For ISO transfers the padding
+ | | | between each ISO packets is not transmitted.
+
+USBIP_RET_UNLINK: Reply for URB unlink
+
+ Offset | Length | Value | Description
+-----------+--------+------------+---------------------------------------------------
+ 0 | 4 | 0x00000004 | command: reply for the URB unlink command
+-----------+--------+------------+---------------------------------------------------
+ 4 | 4 | | seqnum: the unlinked URB sequence number
+-----------+--------+------------+---------------------------------------------------
+ 8 | 4 | | devid
+-----------+--------+------------+---------------------------------------------------
+ 0xC | 4 | | direction: 0: USBIP_DIR_OUT
+ | | | 1: USBIP_DIR_IN
+-----------+--------+------------+---------------------------------------------------
+ 0x10 | 4 | | ep: endpoint number
+-----------+--------+------------+---------------------------------------------------
+ 0x14 | 4 | | status: This is the value contained in the
+ | | | urb->status in the URB completition handler.
+ | | | FIXME: a better explanation needed.
+-----------+--------+------------+---------------------------------------------------
+ 0x30 | n | | URB data bytes. For ISO transfers the padding
+ | | | between each ISO packets is not transmitted.
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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.
+ *
+ */
+
+#ifndef __USBIP_VHCI_H
+#define __USBIP_VHCI_H
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/wait.h>
+
+struct vhci_device {
+ struct usb_device *udev;
+
+ /*
+ * devid specifies a remote usb device uniquely instead
+ * of combination of busnum and devnum.
+ */
+ __u32 devid;
+
+ /* speed of a remote device */
+ enum usb_device_speed speed;
+
+ /* vhci root-hub port to which this device is attached */
+ __u32 rhport;
+
+ struct usbip_device ud;
+
+ /* lock for the below link lists */
+ spinlock_t priv_lock;
+
+ /* vhci_priv is linked to one of them. */
+ struct list_head priv_tx;
+ struct list_head priv_rx;
+
+ /* vhci_unlink is linked to one of them */
+ struct list_head unlink_tx;
+ struct list_head unlink_rx;
+
+ /* vhci_tx thread sleeps for this queue */
+ wait_queue_head_t waitq_tx;
+};
+
+/* urb->hcpriv, use container_of() */
+struct vhci_priv {
+ unsigned long seqnum;
+ struct list_head list;
+
+ struct vhci_device *vdev;
+ struct urb *urb;
+};
+
+struct vhci_unlink {
+ /* seqnum of this request */
+ unsigned long seqnum;
+
+ struct list_head list;
+
+ /* seqnum of the unlink target */
+ unsigned long unlink_seqnum;
+};
+
+/* Number of supported ports. Value has an upperbound of USB_MAXCHILDREN */
+#define VHCI_NPORTS 8
+
+/* for usb_bus.hcpriv */
+struct vhci_hcd {
+ spinlock_t lock;
+
+ u32 port_status[VHCI_NPORTS];
+
+ unsigned resuming:1;
+ unsigned long re_timeout;
+
+ atomic_t seqnum;
+
+ /*
+ * NOTE:
+ * wIndex shows the port number and begins from 1.
+ * But, the index of this array begins from 0.
+ */
+ struct vhci_device vdev[VHCI_NPORTS];
+};
+
+extern struct vhci_hcd *the_controller;
+extern const struct attribute_group dev_attr_group;
+
+/* vhci_hcd.c */
+void rh_port_connect(int rhport, enum usb_device_speed speed);
+
+/* vhci_rx.c */
+struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum);
+int vhci_rx_loop(void *data);
+
+/* vhci_tx.c */
+int vhci_tx_loop(void *data);
+
+static inline struct vhci_device *port_to_vdev(__u32 port)
+{
+ return &the_controller->vdev[port];
+}
+
+static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
+{
+ return (struct vhci_hcd *) (hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
+{
+ return container_of((void *) vhci, struct usb_hcd, hcd_priv);
+}
+
+static inline struct device *vhci_dev(struct vhci_hcd *vhci)
+{
+ return vhci_to_hcd(vhci)->self.controller;
+}
+
+#endif /* __USBIP_VHCI_H */
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "usbip_common.h"
+#include "vhci.h"
+
+#define DRIVER_AUTHOR "Takahiro Hirofuchi"
+#define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver"
+
+/*
+ * TODO
+ * - update root hub emulation
+ * - move the emulation code to userland ?
+ * porting to other operating systems
+ * minimize kernel code
+ * - add suspend/resume code
+ * - clean up everything
+ */
+
+/* See usb gadget dummy hcd */
+
+static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
+static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ u16 wIndex, char *buff, u16 wLength);
+static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags);
+static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
+static int vhci_start(struct usb_hcd *vhci_hcd);
+static void vhci_stop(struct usb_hcd *hcd);
+static int vhci_get_frame_number(struct usb_hcd *hcd);
+
+static const char driver_name[] = "vhci_hcd";
+static const char driver_desc[] = "USB/IP Virtual Host Controller";
+
+struct vhci_hcd *the_controller;
+
+static const char * const bit_desc[] = {
+ "CONNECTION", /*0*/
+ "ENABLE", /*1*/
+ "SUSPEND", /*2*/
+ "OVER_CURRENT", /*3*/
+ "RESET", /*4*/
+ "R5", /*5*/
+ "R6", /*6*/
+ "R7", /*7*/
+ "POWER", /*8*/
+ "LOWSPEED", /*9*/
+ "HIGHSPEED", /*10*/
+ "PORT_TEST", /*11*/
+ "INDICATOR", /*12*/
+ "R13", /*13*/
+ "R14", /*14*/
+ "R15", /*15*/
+ "C_CONNECTION", /*16*/
+ "C_ENABLE", /*17*/
+ "C_SUSPEND", /*18*/
+ "C_OVER_CURRENT", /*19*/
+ "C_RESET", /*20*/
+ "R21", /*21*/
+ "R22", /*22*/
+ "R23", /*23*/
+ "R24", /*24*/
+ "R25", /*25*/
+ "R26", /*26*/
+ "R27", /*27*/
+ "R28", /*28*/
+ "R29", /*29*/
+ "R30", /*30*/
+ "R31", /*31*/
+};
+
+static void dump_port_status_diff(u32 prev_status, u32 new_status)
+{
+ int i = 0;
+ u32 bit = 1;
+
+ pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status);
+ while (bit) {
+ u32 prev = prev_status & bit;
+ u32 new = new_status & bit;
+ char change;
+
+ if (!prev && new)
+ change = '+';
+ else if (prev && !new)
+ change = '-';
+ else
+ change = ' ';
+
+ if (prev || new)
+ pr_debug(" %c%s\n", change, bit_desc[i]);
+ bit <<= 1;
+ i++;
+ }
+ pr_debug("\n");
+}
+
+void rh_port_connect(int rhport, enum usb_device_speed speed)
+{
+ usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
+
+ spin_lock(&the_controller->lock);
+
+ the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
+ | (1 << USB_PORT_FEAT_C_CONNECTION);
+
+ switch (speed) {
+ case USB_SPEED_HIGH:
+ the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED;
+ break;
+ case USB_SPEED_LOW:
+ the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED;
+ break;
+ default:
+ break;
+ }
+
+ spin_unlock(&the_controller->lock);
+
+ usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
+}
+
+static void rh_port_disconnect(int rhport)
+{
+ usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
+
+ spin_lock(&the_controller->lock);
+
+ the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
+ the_controller->port_status[rhport] |=
+ (1 << USB_PORT_FEAT_C_CONNECTION);
+
+ spin_unlock(&the_controller->lock);
+ usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
+}
+
+#define PORT_C_MASK \
+ ((USB_PORT_STAT_C_CONNECTION \
+ | USB_PORT_STAT_C_ENABLE \
+ | USB_PORT_STAT_C_SUSPEND \
+ | USB_PORT_STAT_C_OVERCURRENT \
+ | USB_PORT_STAT_C_RESET) << 16)
+
+/*
+ * Returns 0 if the status hasn't changed, or the number of bytes in buf.
+ * Ports are 0-indexed from the HCD point of view,
+ * and 1-indexed from the USB core pointer of view.
+ *
+ * @buf: a bitmap to show which port status has been changed.
+ * bit 0: reserved
+ * bit 1: the status of port 0 has been changed.
+ * bit 2: the status of port 1 has been changed.
+ * ...
+ */
+static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
+{
+ struct vhci_hcd *vhci;
+ int retval;
+ int rhport;
+ int changed = 0;
+
+ retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8);
+ memset(buf, 0, retval);
+
+ vhci = hcd_to_vhci(hcd);
+
+ spin_lock(&vhci->lock);
+ if (!HCD_HW_ACCESSIBLE(hcd)) {
+ usbip_dbg_vhci_rh("hw accessible flag not on?\n");
+ goto done;
+ }
+
+ /* check pseudo status register for each port */
+ for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
+ if ((vhci->port_status[rhport] & PORT_C_MASK)) {
+ /* The status of a port has been changed, */
+ usbip_dbg_vhci_rh("port %d status changed\n", rhport);
+
+ buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8;
+ changed = 1;
+ }
+ }
+
+ if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1))
+ usb_hcd_resume_root_hub(hcd);
+
+done:
+ spin_unlock(&vhci->lock);
+ return changed ? retval : 0;
+}
+
+static inline void hub_descriptor(struct usb_hub_descriptor *desc)
+{
+ memset(desc, 0, sizeof(*desc));
+ desc->bDescriptorType = 0x29;
+ desc->bDescLength = 9;
+ desc->wHubCharacteristics = (__constant_cpu_to_le16(0x0001));
+ desc->bNbrPorts = VHCI_NPORTS;
+ desc->u.hs.DeviceRemovable[0] = 0xff;
+ desc->u.hs.DeviceRemovable[1] = 0xff;
+}
+
+static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct vhci_hcd *dum;
+ int retval = 0;
+ int rhport;
+
+ u32 prev_port_status[VHCI_NPORTS];
+
+ if (!HCD_HW_ACCESSIBLE(hcd))
+ return -ETIMEDOUT;
+
+ /*
+ * NOTE:
+ * wIndex shows the port number and begins from 1.
+ */
+ usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
+ wIndex);
+ if (wIndex > VHCI_NPORTS)
+ pr_err("invalid port number %d\n", wIndex);
+ rhport = ((__u8)(wIndex & 0x00ff)) - 1;
+
+ dum = hcd_to_vhci(hcd);
+
+ spin_lock(&dum->lock);
+
+ /* store old status and compare now and old later */
+ if (usbip_dbg_flag_vhci_rh) {
+ memcpy(prev_port_status, dum->port_status,
+ sizeof(prev_port_status));
+ }
+
+ switch (typeReq) {
+ case ClearHubFeature:
+ usbip_dbg_vhci_rh(" ClearHubFeature\n");
+ break;
+ case ClearPortFeature:
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
+ /* 20msec signaling */
+ dum->resuming = 1;
+ dum->re_timeout =
+ jiffies + msecs_to_jiffies(20);
+ }
+ break;
+ case USB_PORT_FEAT_POWER:
+ usbip_dbg_vhci_rh(
+ " ClearPortFeature: USB_PORT_FEAT_POWER\n");
+ dum->port_status[rhport] = 0;
+ dum->resuming = 0;
+ break;
+ case USB_PORT_FEAT_C_RESET:
+ usbip_dbg_vhci_rh(
+ " ClearPortFeature: USB_PORT_FEAT_C_RESET\n");
+ switch (dum->vdev[rhport].speed) {
+ case USB_SPEED_HIGH:
+ dum->port_status[rhport] |=
+ USB_PORT_STAT_HIGH_SPEED;
+ break;
+ case USB_SPEED_LOW:
+ dum->port_status[rhport] |=
+ USB_PORT_STAT_LOW_SPEED;
+ break;
+ default:
+ break;
+ }
+ default:
+ usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
+ wValue);
+ dum->port_status[rhport] &= ~(1 << wValue);
+ break;
+ }
+ break;
+ case GetHubDescriptor:
+ usbip_dbg_vhci_rh(" GetHubDescriptor\n");
+ hub_descriptor((struct usb_hub_descriptor *) buf);
+ break;
+ case GetHubStatus:
+ usbip_dbg_vhci_rh(" GetHubStatus\n");
+ *(__le32 *) buf = cpu_to_le32(0);
+ break;
+ case GetPortStatus:
+ usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
+ if (wIndex > VHCI_NPORTS || wIndex < 1) {
+ pr_err("invalid port number %d\n", wIndex);
+ retval = -EPIPE;
+ }
+
+ /* we do not care about resume. */
+
+ /* whoever resets or resumes must GetPortStatus to
+ * complete it!!
+ */
+ if (dum->resuming && time_after(jiffies, dum->re_timeout)) {
+ dum->port_status[rhport] |=
+ (1 << USB_PORT_FEAT_C_SUSPEND);
+ dum->port_status[rhport] &=
+ ~(1 << USB_PORT_FEAT_SUSPEND);
+ dum->resuming = 0;
+ dum->re_timeout = 0;
+ }
+
+ if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
+ 0 && time_after(jiffies, dum->re_timeout)) {
+ dum->port_status[rhport] |=
+ (1 << USB_PORT_FEAT_C_RESET);
+ dum->port_status[rhport] &=
+ ~(1 << USB_PORT_FEAT_RESET);
+ dum->re_timeout = 0;
+
+ if (dum->vdev[rhport].ud.status ==
+ VDEV_ST_NOTASSIGNED) {
+ usbip_dbg_vhci_rh(
+ " enable rhport %d (status %u)\n",
+ rhport,
+ dum->vdev[rhport].ud.status);
+ dum->port_status[rhport] |=
+ USB_PORT_STAT_ENABLE;
+ }
+ }
+ ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]);
+ ((__le16 *) buf)[1] =
+ cpu_to_le16(dum->port_status[rhport] >> 16);
+
+ usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
+ ((u16 *)buf)[1]);
+ break;
+ case SetHubFeature:
+ usbip_dbg_vhci_rh(" SetHubFeature\n");
+ retval = -EPIPE;
+ break;
+ case SetPortFeature:
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ usbip_dbg_vhci_rh(
+ " SetPortFeature: USB_PORT_FEAT_SUSPEND\n");
+ break;
+ case USB_PORT_FEAT_RESET:
+ usbip_dbg_vhci_rh(
+ " SetPortFeature: USB_PORT_FEAT_RESET\n");
+ /* if it's already running, disconnect first */
+ if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) {
+ dum->port_status[rhport] &=
+ ~(USB_PORT_STAT_ENABLE |
+ USB_PORT_STAT_LOW_SPEED |
+ USB_PORT_STAT_HIGH_SPEED);
+ /* FIXME test that code path! */
+ }
+ /* 50msec reset signaling */
+ dum->re_timeout = jiffies + msecs_to_jiffies(50);
+
+ /* FALLTHROUGH */
+ default:
+ usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
+ wValue);
+ dum->port_status[rhport] |= (1 << wValue);
+ break;
+ }
+ break;
+
+ default:
+ pr_err("default: no such request\n");
+
+ /* "protocol stall" on error */
+ retval = -EPIPE;
+ }
+
+ if (usbip_dbg_flag_vhci_rh) {
+ pr_debug("port %d\n", rhport);
+ /* Only dump valid port status */
+ if (rhport >= 0) {
+ dump_port_status_diff(prev_port_status[rhport],
+ dum->port_status[rhport]);
+ }
+ }
+ usbip_dbg_vhci_rh(" bye\n");
+
+ spin_unlock(&dum->lock);
+
+ return retval;
+}
+
+static struct vhci_device *get_vdev(struct usb_device *udev)
+{
+ int i;
+
+ if (!udev)
+ return NULL;
+
+ for (i = 0; i < VHCI_NPORTS; i++)
+ if (the_controller->vdev[i].udev == udev)
+ return port_to_vdev(i);
+
+ return NULL;
+}
+
+static void vhci_tx_urb(struct urb *urb)
+{
+ struct vhci_device *vdev = get_vdev(urb->dev);
+ struct vhci_priv *priv;
+
+ if (!vdev) {
+ pr_err("could not get virtual device");
+ return;
+ }
+
+ priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
+ if (!priv) {
+ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ spin_lock(&vdev->priv_lock);
+
+ priv->seqnum = atomic_inc_return(&the_controller->seqnum);
+ if (priv->seqnum == 0xffff)
+ dev_info(&urb->dev->dev, "seqnum max\n");
+
+ priv->vdev = vdev;
+ priv->urb = urb;
+
+ urb->hcpriv = (void *) priv;
+
+ list_add_tail(&priv->list, &vdev->priv_tx);
+
+ wake_up(&vdev->waitq_tx);
+ spin_unlock(&vdev->priv_lock);
+}
+
+static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags)
+{
+ struct device *dev = &urb->dev->dev;
+ int ret = 0;
+ struct vhci_device *vdev;
+
+ usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
+ hcd, urb, mem_flags);
+
+ /* patch to usb_sg_init() is in 2.5.60 */
+ BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
+
+ spin_lock(&the_controller->lock);
+
+ if (urb->status != -EINPROGRESS) {
+ dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
+ spin_unlock(&the_controller->lock);
+ return urb->status;
+ }
+
+ vdev = port_to_vdev(urb->dev->portnum-1);
+
+ /* refuse enqueue for dead connection */
+ spin_lock(&vdev->ud.lock);
+ if (vdev->ud.status == VDEV_ST_NULL ||
+ vdev->ud.status == VDEV_ST_ERROR) {
+ dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
+ spin_unlock(&vdev->ud.lock);
+ spin_unlock(&the_controller->lock);
+ return -ENODEV;
+ }
+ spin_unlock(&vdev->ud.lock);
+
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
+ goto no_need_unlink;
+
+ /*
+ * The enumeration process is as follows;
+ *
+ * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
+ * to get max packet length of default pipe
+ *
+ * 2. Set_Address request to DevAddr(0) EndPoint(0)
+ *
+ */
+ if (usb_pipedevice(urb->pipe) == 0) {
+ __u8 type = usb_pipetype(urb->pipe);
+ struct usb_ctrlrequest *ctrlreq =
+ (struct usb_ctrlrequest *) urb->setup_packet;
+
+ if (type != PIPE_CONTROL || !ctrlreq) {
+ dev_err(dev, "invalid request to devnum 0\n");
+ ret = -EINVAL;
+ goto no_need_xmit;
+ }
+
+ switch (ctrlreq->bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ /* set_address may come when a device is reset */
+ dev_info(dev, "SetAddress Request (%d) to port %d\n",
+ ctrlreq->wValue, vdev->rhport);
+
+ if (vdev->udev)
+ usb_put_dev(vdev->udev);
+ vdev->udev = usb_get_dev(urb->dev);
+
+ spin_lock(&vdev->ud.lock);
+ vdev->ud.status = VDEV_ST_USED;
+ spin_unlock(&vdev->ud.lock);
+
+ if (urb->status == -EINPROGRESS) {
+ /* This request is successfully completed. */
+ /* If not -EINPROGRESS, possibly unlinked. */
+ urb->status = 0;
+ }
+
+ goto no_need_xmit;
+
+ case USB_REQ_GET_DESCRIPTOR:
+ if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8))
+ usbip_dbg_vhci_hc(
+ "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n");
+
+ if (vdev->udev)
+ usb_put_dev(vdev->udev);
+ vdev->udev = usb_get_dev(urb->dev);
+ goto out;
+
+ default:
+ /* NOT REACHED */
+ dev_err(dev,
+ "invalid request to devnum 0 bRequest %u, wValue %u\n",
+ ctrlreq->bRequest,
+ ctrlreq->wValue);
+ ret = -EINVAL;
+ goto no_need_xmit;
+ }
+
+ }
+
+out:
+ vhci_tx_urb(urb);
+ spin_unlock(&the_controller->lock);
+
+ return 0;
+
+no_need_xmit:
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+no_need_unlink:
+ spin_unlock(&the_controller->lock);
+ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
+ return ret;
+}
+
+/*
+ * vhci_rx gives back the urb after receiving the reply of the urb. If an
+ * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
+ * back its urb. For the driver unlinking the urb, the content of the urb is
+ * not important, but the calling to its completion handler is important; the
+ * completion of unlinking is notified by the completion handler.
+ *
+ *
+ * CLIENT SIDE
+ *
+ * - When vhci_hcd receives RET_SUBMIT,
+ *
+ * - case 1a). the urb of the pdu is not unlinking.
+ * - normal case
+ * => just give back the urb
+ *
+ * - case 1b). the urb of the pdu is unlinking.
+ * - usbip.ko will return a reply of the unlinking request.
+ * => give back the urb now and go to case 2b).
+ *
+ * - When vhci_hcd receives RET_UNLINK,
+ *
+ * - case 2a). a submit request is still pending in vhci_hcd.
+ * - urb was really pending in usbip.ko and urb_unlink_urb() was
+ * completed there.
+ * => free a pending submit request
+ * => notify unlink completeness by giving back the urb
+ *
+ * - case 2b). a submit request is *not* pending in vhci_hcd.
+ * - urb was already given back to the core driver.
+ * => do not give back the urb
+ *
+ *
+ * SERVER SIDE
+ *
+ * - When usbip receives CMD_UNLINK,
+ *
+ * - case 3a). the urb of the unlink request is now in submission.
+ * => do usb_unlink_urb().
+ * => after the unlink is completed, send RET_UNLINK.
+ *
+ * - case 3b). the urb of the unlink request is not in submission.
+ * - may be already completed or never be received
+ * => send RET_UNLINK
+ *
+ */
+static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+ struct vhci_priv *priv;
+ struct vhci_device *vdev;
+
+ pr_info("dequeue a urb %p\n", urb);
+
+ spin_lock(&the_controller->lock);
+
+ priv = urb->hcpriv;
+ if (!priv) {
+ /* URB was never linked! or will be soon given back by
+ * vhci_rx. */
+ spin_unlock(&the_controller->lock);
+ return 0;
+ }
+
+ {
+ int ret = 0;
+
+ ret = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (ret) {
+ spin_unlock(&the_controller->lock);
+ return ret;
+ }
+ }
+
+ /* send unlink request here? */
+ vdev = priv->vdev;
+
+ if (!vdev->ud.tcp_socket) {
+ /* tcp connection is closed */
+ spin_lock(&vdev->priv_lock);
+
+ pr_info("device %p seems to be disconnected\n", vdev);
+ list_del(&priv->list);
+ kfree(priv);
+ urb->hcpriv = NULL;
+
+ spin_unlock(&vdev->priv_lock);
+
+ /*
+ * If tcp connection is alive, we have sent CMD_UNLINK.
+ * vhci_rx will receive RET_UNLINK and give back the URB.
+ * Otherwise, we give back it here.
+ */
+ pr_info("gives back urb %p\n", urb);
+
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+
+ spin_unlock(&the_controller->lock);
+ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
+ urb->status);
+ spin_lock(&the_controller->lock);
+
+ } else {
+ /* tcp connection is alive */
+ struct vhci_unlink *unlink;
+
+ spin_lock(&vdev->priv_lock);
+
+ /* setup CMD_UNLINK pdu */
+ unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
+ if (!unlink) {
+ spin_unlock(&vdev->priv_lock);
+ spin_unlock(&the_controller->lock);
+ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
+ return -ENOMEM;
+ }
+
+ unlink->seqnum = atomic_inc_return(&the_controller->seqnum);
+ if (unlink->seqnum == 0xffff)
+ pr_info("seqnum max\n");
+
+ unlink->unlink_seqnum = priv->seqnum;
+
+ pr_info("device %p seems to be still connected\n", vdev);
+
+ /* send cmd_unlink and try to cancel the pending URB in the
+ * peer */
+ list_add_tail(&unlink->list, &vdev->unlink_tx);
+ wake_up(&vdev->waitq_tx);
+
+ spin_unlock(&vdev->priv_lock);
+ }
+
+ spin_unlock(&the_controller->lock);
+
+ usbip_dbg_vhci_hc("leave\n");
+ return 0;
+}
+
+static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
+{
+ struct vhci_unlink *unlink, *tmp;
+
+ spin_lock(&the_controller->lock);
+ spin_lock(&vdev->priv_lock);
+
+ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
+ pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
+ list_del(&unlink->list);
+ kfree(unlink);
+ }
+
+ while (!list_empty(&vdev->unlink_rx)) {
+ struct urb *urb;
+
+ unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
+ list);
+
+ /* give back URB of unanswered unlink request */
+ pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
+
+ urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
+ if (!urb) {
+ pr_info("the urb (seqnum %lu) was already given back\n",
+ unlink->unlink_seqnum);
+ list_del(&unlink->list);
+ kfree(unlink);
+ continue;
+ }
+
+ urb->status = -ENODEV;
+
+ usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
+
+ list_del(&unlink->list);
+
+ spin_unlock(&vdev->priv_lock);
+ spin_unlock(&the_controller->lock);
+
+ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
+ urb->status);
+
+ spin_lock(&the_controller->lock);
+ spin_lock(&vdev->priv_lock);
+
+ kfree(unlink);
+ }
+
+ spin_unlock(&vdev->priv_lock);
+ spin_unlock(&the_controller->lock);
+}
+
+/*
+ * The important thing is that only one context begins cleanup.
+ * This is why error handling and cleanup become simple.
+ * We do not want to consider race condition as possible.
+ */
+static void vhci_shutdown_connection(struct usbip_device *ud)
+{
+ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+
+ /* need this? see stub_dev.c */
+ if (ud->tcp_socket) {
+ pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
+ kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
+ }
+
+ /* kill threads related to this sdev */
+ if (vdev->ud.tcp_rx) {
+ kthread_stop_put(vdev->ud.tcp_rx);
+ vdev->ud.tcp_rx = NULL;
+ }
+ if (vdev->ud.tcp_tx) {
+ kthread_stop_put(vdev->ud.tcp_tx);
+ vdev->ud.tcp_tx = NULL;
+ }
+ pr_info("stop threads\n");
+
+ /* active connection is closed */
+ if (vdev->ud.tcp_socket) {
+ sockfd_put(vdev->ud.tcp_socket);
+ vdev->ud.tcp_socket = NULL;
+ }
+ pr_info("release socket\n");
+
+ vhci_device_unlink_cleanup(vdev);
+
+ /*
+ * rh_port_disconnect() is a trigger of ...
+ * usb_disable_device():
+ * disable all the endpoints for a USB device.
+ * usb_disable_endpoint():
+ * disable endpoints. pending urbs are unlinked(dequeued).
+ *
+ * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
+ * detached device should release used urbs in a cleanup function (i.e.
+ * xxx_disconnect()). Therefore, vhci_hcd does not need to release
+ * pushed urbs and their private data in this function.
+ *
+ * NOTE: vhci_dequeue() must be considered carefully. When shutting down
+ * a connection, vhci_shutdown_connection() expects vhci_dequeue()
+ * gives back pushed urbs and frees their private data by request of
+ * the cleanup function of a USB driver. When unlinking a urb with an
+ * active connection, vhci_dequeue() does not give back the urb which
+ * is actually given back by vhci_rx after receiving its return pdu.
+ *
+ */
+ rh_port_disconnect(vdev->rhport);
+
+ pr_info("disconnect device\n");
+}
+
+
+static void vhci_device_reset(struct usbip_device *ud)
+{
+ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+
+ spin_lock(&ud->lock);
+
+ vdev->speed = 0;
+ vdev->devid = 0;
+
+ if (vdev->udev)
+ usb_put_dev(vdev->udev);
+ vdev->udev = NULL;
+
+ if (ud->tcp_socket) {
+ sockfd_put(ud->tcp_socket);
+ ud->tcp_socket = NULL;
+ }
+ ud->status = VDEV_ST_NULL;
+
+ spin_unlock(&ud->lock);
+}
+
+static void vhci_device_unusable(struct usbip_device *ud)
+{
+ spin_lock(&ud->lock);
+ ud->status = VDEV_ST_ERROR;
+ spin_unlock(&ud->lock);
+}
+
+static void vhci_device_init(struct vhci_device *vdev)
+{
+ memset(vdev, 0, sizeof(*vdev));
+
+ vdev->ud.side = USBIP_VHCI;
+ vdev->ud.status = VDEV_ST_NULL;
+ spin_lock_init(&vdev->ud.lock);
+
+ INIT_LIST_HEAD(&vdev->priv_rx);
+ INIT_LIST_HEAD(&vdev->priv_tx);
+ INIT_LIST_HEAD(&vdev->unlink_tx);
+ INIT_LIST_HEAD(&vdev->unlink_rx);
+ spin_lock_init(&vdev->priv_lock);
+
+ init_waitqueue_head(&vdev->waitq_tx);
+
+ vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
+ vdev->ud.eh_ops.reset = vhci_device_reset;
+ vdev->ud.eh_ops.unusable = vhci_device_unusable;
+
+ usbip_start_eh(&vdev->ud);
+}
+
+static int vhci_start(struct usb_hcd *hcd)
+{
+ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
+ int rhport;
+ int err = 0;
+
+ usbip_dbg_vhci_hc("enter vhci_start\n");
+
+ /* initialize private data of usb_hcd */
+
+ for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
+ struct vhci_device *vdev = &vhci->vdev[rhport];
+
+ vhci_device_init(vdev);
+ vdev->rhport = rhport;
+ }
+
+ atomic_set(&vhci->seqnum, 0);
+ spin_lock_init(&vhci->lock);
+
+ hcd->power_budget = 0; /* no limit */
+ hcd->uses_new_polling = 1;
+
+ /* vhci_hcd is now ready to be controlled through sysfs */
+ err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
+ if (err) {
+ pr_err("create sysfs files\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static void vhci_stop(struct usb_hcd *hcd)
+{
+ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
+ int rhport = 0;
+
+ usbip_dbg_vhci_hc("stop VHCI controller\n");
+
+ /* 1. remove the userland interface of vhci_hcd */
+ sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
+
+ /* 2. shutdown all the ports of vhci_hcd */
+ for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
+ struct vhci_device *vdev = &vhci->vdev[rhport];
+
+ usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
+ usbip_stop_eh(&vdev->ud);
+ }
+}
+
+static int vhci_get_frame_number(struct usb_hcd *hcd)
+{
+ pr_err("Not yet implemented\n");
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+/* FIXME: suspend/resume */
+static int vhci_bus_suspend(struct usb_hcd *hcd)
+{
+ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
+
+ dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
+
+ spin_lock(&vhci->lock);
+ hcd->state = HC_STATE_SUSPENDED;
+ spin_unlock(&vhci->lock);
+
+ return 0;
+}
+
+static int vhci_bus_resume(struct usb_hcd *hcd)
+{
+ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
+ int rc = 0;
+
+ dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
+
+ spin_lock(&vhci->lock);
+ if (!HCD_HW_ACCESSIBLE(hcd))
+ rc = -ESHUTDOWN;
+ else
+ hcd->state = HC_STATE_RUNNING;
+ spin_unlock(&vhci->lock);
+
+ return rc;
+}
+
+#else
+
+#define vhci_bus_suspend NULL
+#define vhci_bus_resume NULL
+#endif
+
+static struct hc_driver vhci_hc_driver = {
+ .description = driver_name,
+ .product_desc = driver_desc,
+ .hcd_priv_size = sizeof(struct vhci_hcd),
+
+ .flags = HCD_USB2,
+
+ .start = vhci_start,
+ .stop = vhci_stop,
+
+ .urb_enqueue = vhci_urb_enqueue,
+ .urb_dequeue = vhci_urb_dequeue,
+
+ .get_frame_number = vhci_get_frame_number,
+
+ .hub_status_data = vhci_hub_status,
+ .hub_control = vhci_hub_control,
+ .bus_suspend = vhci_bus_suspend,
+ .bus_resume = vhci_bus_resume,
+};
+
+static int vhci_hcd_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ int ret;
+
+ usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
+
+ /*
+ * Allocate and initialize hcd.
+ * Our private data is also allocated automatically.
+ */
+ hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ pr_err("create hcd failed\n");
+ return -ENOMEM;
+ }
+ hcd->has_tt = 1;
+
+ /* this is private data for vhci_hcd */
+ the_controller = hcd_to_vhci(hcd);
+
+ /*
+ * Finish generic HCD structure initialization and register.
+ * Call the driver's reset() and start() routines.
+ */
+ ret = usb_add_hcd(hcd, 0, 0);
+ if (ret != 0) {
+ pr_err("usb_add_hcd failed %d\n", ret);
+ usb_put_hcd(hcd);
+ the_controller = NULL;
+ return ret;
+ }
+
+ usbip_dbg_vhci_hc("bye\n");
+ return 0;
+}
+
+static int vhci_hcd_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+
+ hcd = platform_get_drvdata(pdev);
+ if (!hcd)
+ return 0;
+
+ /*
+ * Disconnects the root hub,
+ * then reverses the effects of usb_add_hcd(),
+ * invoking the HCD's stop() methods.
+ */
+ usb_remove_hcd(hcd);
+ usb_put_hcd(hcd);
+ the_controller = NULL;
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+/* what should happen for USB/IP under suspend/resume? */
+static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct usb_hcd *hcd;
+ int rhport = 0;
+ int connected = 0;
+ int ret = 0;
+
+ hcd = platform_get_drvdata(pdev);
+
+ spin_lock(&the_controller->lock);
+
+ for (rhport = 0; rhport < VHCI_NPORTS; rhport++)
+ if (the_controller->port_status[rhport] &
+ USB_PORT_STAT_CONNECTION)
+ connected += 1;
+
+ spin_unlock(&the_controller->lock);
+
+ if (connected > 0) {
+ dev_info(&pdev->dev,
+ "We have %d active connection%s. Do not suspend.\n",
+ connected, (connected == 1 ? "" : "s"));
+ ret = -EBUSY;
+ } else {
+ dev_info(&pdev->dev, "suspend vhci_hcd");
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ }
+
+ return ret;
+}
+
+static int vhci_hcd_resume(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ hcd = platform_get_drvdata(pdev);
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ usb_hcd_poll_rh_status(hcd);
+
+ return 0;
+}
+
+#else
+
+#define vhci_hcd_suspend NULL
+#define vhci_hcd_resume NULL
+
+#endif
+
+static struct platform_driver vhci_driver = {
+ .probe = vhci_hcd_probe,
+ .remove = vhci_hcd_remove,
+ .suspend = vhci_hcd_suspend,
+ .resume = vhci_hcd_resume,
+ .driver = {
+ .name = driver_name,
+ .owner = THIS_MODULE,
+ },
+};
+
+/*
+ * The VHCI 'device' is 'virtual'; not a real plug&play hardware.
+ * We need to add this virtual device as a platform device arbitrarily:
+ * 1. platform_device_register()
+ */
+static void the_pdev_release(struct device *dev)
+{
+}
+
+static struct platform_device the_pdev = {
+ /* should be the same name as driver_name */
+ .name = driver_name,
+ .id = -1,
+ .dev = {
+ .release = the_pdev_release,
+ },
+};
+
+static int __init vhci_hcd_init(void)
+{
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ ret = platform_driver_register(&vhci_driver);
+ if (ret)
+ goto err_driver_register;
+
+ ret = platform_device_register(&the_pdev);
+ if (ret)
+ goto err_platform_device_register;
+
+ pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
+ return ret;
+
+err_platform_device_register:
+ platform_driver_unregister(&vhci_driver);
+err_driver_register:
+ return ret;
+}
+
+static void __exit vhci_hcd_exit(void)
+{
+ platform_device_unregister(&the_pdev);
+ platform_driver_unregister(&vhci_driver);
+}
+
+module_init(vhci_hcd_init);
+module_exit(vhci_hcd_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(USBIP_VERSION);
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/slab.h>
+
+#include "usbip_common.h"
+#include "vhci.h"
+
+/* get URB from transmitted urb queue. caller must hold vdev->priv_lock */
+struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev, __u32 seqnum)
+{
+ struct vhci_priv *priv, *tmp;
+ struct urb *urb = NULL;
+ int status;
+
+ list_for_each_entry_safe(priv, tmp, &vdev->priv_rx, list) {
+ if (priv->seqnum != seqnum)
+ continue;
+
+ urb = priv->urb;
+ status = urb->status;
+
+ usbip_dbg_vhci_rx("find urb %p vurb %p seqnum %u\n",
+ urb, priv, seqnum);
+
+ switch (status) {
+ case -ENOENT:
+ /* fall through */
+ case -ECONNRESET:
+ dev_info(&urb->dev->dev,
+ "urb %p was unlinked %ssynchronuously.\n", urb,
+ status == -ENOENT ? "" : "a");
+ break;
+ case -EINPROGRESS:
+ /* no info output */
+ break;
+ default:
+ dev_info(&urb->dev->dev,
+ "urb %p may be in a error, status %d\n", urb,
+ status);
+ }
+
+ list_del(&priv->list);
+ kfree(priv);
+ urb->hcpriv = NULL;
+
+ break;
+ }
+
+ return urb;
+}
+
+static void vhci_recv_ret_submit(struct vhci_device *vdev,
+ struct usbip_header *pdu)
+{
+ struct usbip_device *ud = &vdev->ud;
+ struct urb *urb;
+
+ spin_lock(&vdev->priv_lock);
+ urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
+ spin_unlock(&vdev->priv_lock);
+
+ if (!urb) {
+ pr_err("cannot find a urb of seqnum %u\n", pdu->base.seqnum);
+ pr_info("max seqnum %d\n",
+ atomic_read(&the_controller->seqnum));
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ return;
+ }
+
+ /* unpack the pdu to a urb */
+ usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0);
+
+ /* recv transfer buffer */
+ if (usbip_recv_xbuff(ud, urb) < 0)
+ return;
+
+ /* recv iso_packet_descriptor */
+ if (usbip_recv_iso(ud, urb) < 0)
+ return;
+
+ /* restore the padding in iso packets */
+ usbip_pad_iso(ud, urb);
+
+ if (usbip_dbg_flag_vhci_rx)
+ usbip_dump_urb(urb);
+
+ usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
+
+ spin_lock(&the_controller->lock);
+ usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
+ spin_unlock(&the_controller->lock);
+
+ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
+
+ usbip_dbg_vhci_rx("Leave\n");
+}
+
+static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
+ struct usbip_header *pdu)
+{
+ struct vhci_unlink *unlink, *tmp;
+
+ spin_lock(&vdev->priv_lock);
+
+ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
+ pr_info("unlink->seqnum %lu\n", unlink->seqnum);
+ if (unlink->seqnum == pdu->base.seqnum) {
+ usbip_dbg_vhci_rx("found pending unlink, %lu\n",
+ unlink->seqnum);
+ list_del(&unlink->list);
+
+ spin_unlock(&vdev->priv_lock);
+ return unlink;
+ }
+ }
+
+ spin_unlock(&vdev->priv_lock);
+
+ return NULL;
+}
+
+static void vhci_recv_ret_unlink(struct vhci_device *vdev,
+ struct usbip_header *pdu)
+{
+ struct vhci_unlink *unlink;
+ struct urb *urb;
+
+ usbip_dump_header(pdu);
+
+ unlink = dequeue_pending_unlink(vdev, pdu);
+ if (!unlink) {
+ pr_info("cannot find the pending unlink %u\n",
+ pdu->base.seqnum);
+ return;
+ }
+
+ spin_lock(&vdev->priv_lock);
+ urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
+ spin_unlock(&vdev->priv_lock);
+
+ if (!urb) {
+ /*
+ * I get the result of a unlink request. But, it seems that I
+ * already received the result of its submit result and gave
+ * back the URB.
+ */
+ pr_info("the urb (seqnum %d) was already given back\n",
+ pdu->base.seqnum);
+ } else {
+ usbip_dbg_vhci_rx("now giveback urb %p\n", urb);
+
+ /* If unlink is successful, status is -ECONNRESET */
+ urb->status = pdu->u.ret_unlink.status;
+ pr_info("urb->status %d\n", urb->status);
+
+ spin_lock(&the_controller->lock);
+ usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
+ spin_unlock(&the_controller->lock);
+
+ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
+ urb->status);
+ }
+
+ kfree(unlink);
+}
+
+static int vhci_priv_tx_empty(struct vhci_device *vdev)
+{
+ int empty = 0;
+
+ spin_lock(&vdev->priv_lock);
+ empty = list_empty(&vdev->priv_rx);
+ spin_unlock(&vdev->priv_lock);
+
+ return empty;
+}
+
+/* recv a pdu */
+static void vhci_rx_pdu(struct usbip_device *ud)
+{
+ int ret;
+ struct usbip_header pdu;
+ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+
+ usbip_dbg_vhci_rx("Enter\n");
+
+ memset(&pdu, 0, sizeof(pdu));
+
+ /* receive a pdu header */
+ ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
+ if (ret < 0) {
+ if (ret == -ECONNRESET)
+ pr_info("connection reset by peer\n");
+ else if (ret == -EAGAIN) {
+ /* ignore if connection was idle */
+ if (vhci_priv_tx_empty(vdev))
+ return;
+ pr_info("connection timed out with pending urbs\n");
+ } else if (ret != -ERESTARTSYS)
+ pr_info("xmit failed %d\n", ret);
+
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ return;
+ }
+ if (ret == 0) {
+ pr_info("connection closed");
+ usbip_event_add(ud, VDEV_EVENT_DOWN);
+ return;
+ }
+ if (ret != sizeof(pdu)) {
+ pr_err("received pdu size is %d, should be %d\n", ret,
+ (unsigned int)sizeof(pdu));
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ return;
+ }
+
+ usbip_header_correct_endian(&pdu, 0);
+
+ if (usbip_dbg_flag_vhci_rx)
+ usbip_dump_header(&pdu);
+
+ switch (pdu.base.command) {
+ case USBIP_RET_SUBMIT:
+ vhci_recv_ret_submit(vdev, &pdu);
+ break;
+ case USBIP_RET_UNLINK:
+ vhci_recv_ret_unlink(vdev, &pdu);
+ break;
+ default:
+ /* NOT REACHED */
+ pr_err("unknown pdu %u\n", pdu.base.command);
+ usbip_dump_header(&pdu);
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ break;
+ }
+}
+
+int vhci_rx_loop(void *data)
+{
+ struct usbip_device *ud = data;
+
+ while (!kthread_should_stop()) {
+ if (usbip_event_happened(ud))
+ break;
+
+ vhci_rx_pdu(ud);
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/file.h>
+#include <linux/net.h>
+
+#include "usbip_common.h"
+#include "vhci.h"
+
+/* TODO: refine locking ?*/
+
+/* Sysfs entry to show port status */
+static ssize_t status_show(struct device *dev, struct device_attribute *attr,
+ char *out)
+{
+ char *s = out;
+ int i = 0;
+
+ BUG_ON(!the_controller || !out);
+
+ spin_lock(&the_controller->lock);
+
+ /*
+ * output example:
+ * prt sta spd dev socket local_busid
+ * 000 004 000 000 c5a7bb80 1-2.3
+ * 001 004 000 000 d8cee980 2-3.4
+ *
+ * IP address can be retrieved from a socket pointer address by looking
+ * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
+ * port number and its peer IP address.
+ */
+ out += sprintf(out,
+ "prt sta spd bus dev socket local_busid\n");
+
+ for (i = 0; i < VHCI_NPORTS; i++) {
+ struct vhci_device *vdev = port_to_vdev(i);
+
+ spin_lock(&vdev->ud.lock);
+ out += sprintf(out, "%03u %03u ", i, vdev->ud.status);
+
+ if (vdev->ud.status == VDEV_ST_USED) {
+ out += sprintf(out, "%03u %08x ",
+ vdev->speed, vdev->devid);
+ out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
+ out += sprintf(out, "%s", dev_name(&vdev->udev->dev));
+
+ } else {
+ out += sprintf(out, "000 000 000 0000000000000000 0-0");
+ }
+
+ out += sprintf(out, "\n");
+ spin_unlock(&vdev->ud.lock);
+ }
+
+ spin_unlock(&the_controller->lock);
+
+ return out - s;
+}
+static DEVICE_ATTR_RO(status);
+
+/* Sysfs entry to shutdown a virtual connection */
+static int vhci_port_disconnect(__u32 rhport)
+{
+ struct vhci_device *vdev;
+
+ usbip_dbg_vhci_sysfs("enter\n");
+
+ /* lock */
+ spin_lock(&the_controller->lock);
+
+ vdev = port_to_vdev(rhport);
+
+ spin_lock(&vdev->ud.lock);
+ if (vdev->ud.status == VDEV_ST_NULL) {
+ pr_err("not connected %d\n", vdev->ud.status);
+
+ /* unlock */
+ spin_unlock(&vdev->ud.lock);
+ spin_unlock(&the_controller->lock);
+
+ return -EINVAL;
+ }
+
+ /* unlock */
+ spin_unlock(&vdev->ud.lock);
+ spin_unlock(&the_controller->lock);
+
+ usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
+
+ return 0;
+}
+
+static ssize_t store_detach(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int err;
+ __u32 rhport = 0;
+
+ if (sscanf(buf, "%u", &rhport) != 1)
+ return -EINVAL;
+
+ /* check rhport */
+ if (rhport >= VHCI_NPORTS) {
+ dev_err(dev, "invalid port %u\n", rhport);
+ return -EINVAL;
+ }
+
+ err = vhci_port_disconnect(rhport);
+ if (err < 0)
+ return -EINVAL;
+
+ usbip_dbg_vhci_sysfs("Leave\n");
+
+ return count;
+}
+static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach);
+
+/* Sysfs entry to establish a virtual connection */
+static int valid_args(__u32 rhport, enum usb_device_speed speed)
+{
+ /* check rhport */
+ if (rhport >= VHCI_NPORTS) {
+ pr_err("port %u\n", rhport);
+ return -EINVAL;
+ }
+
+ /* check speed */
+ switch (speed) {
+ case USB_SPEED_LOW:
+ case USB_SPEED_FULL:
+ case USB_SPEED_HIGH:
+ case USB_SPEED_WIRELESS:
+ break;
+ default:
+ pr_err("Failed attach request for unsupported USB speed: %s\n",
+ usb_speed_string(speed));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * To start a new USB/IP attachment, a userland program needs to setup a TCP
+ * connection and then write its socket descriptor with remote device
+ * information into this sysfs file.
+ *
+ * A remote device is virtually attached to the root-hub port of @rhport with
+ * @speed. @devid is embedded into a request to specify the remote device in a
+ * server host.
+ *
+ * write() returns 0 on success, else negative errno.
+ */
+static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct vhci_device *vdev;
+ struct socket *socket;
+ int sockfd = 0;
+ __u32 rhport = 0, devid = 0, speed = 0;
+ int err;
+
+ /*
+ * @rhport: port number of vhci_hcd
+ * @sockfd: socket descriptor of an established TCP connection
+ * @devid: unique device identifier in a remote host
+ * @speed: usb device speed in a remote host
+ */
+ if (sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed) != 4)
+ return -EINVAL;
+
+ usbip_dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
+ rhport, sockfd, devid, speed);
+
+ /* check received parameters */
+ if (valid_args(rhport, speed) < 0)
+ return -EINVAL;
+
+ /* Extract socket from fd. */
+ socket = sockfd_lookup(sockfd, &err);
+ if (!socket)
+ return -EINVAL;
+
+ /* now need lock until setting vdev status as used */
+
+ /* begin a lock */
+ spin_lock(&the_controller->lock);
+ vdev = port_to_vdev(rhport);
+ spin_lock(&vdev->ud.lock);
+
+ if (vdev->ud.status != VDEV_ST_NULL) {
+ /* end of the lock */
+ spin_unlock(&vdev->ud.lock);
+ spin_unlock(&the_controller->lock);
+
+ sockfd_put(socket);
+
+ dev_err(dev, "port %d already used\n", rhport);
+ return -EINVAL;
+ }
+
+ dev_info(dev,
+ "rhport(%u) sockfd(%d) devid(%u) speed(%u) speed_str(%s)\n",
+ rhport, sockfd, devid, speed, usb_speed_string(speed));
+
+ vdev->devid = devid;
+ vdev->speed = speed;
+ vdev->ud.tcp_socket = socket;
+ vdev->ud.status = VDEV_ST_NOTASSIGNED;
+
+ spin_unlock(&vdev->ud.lock);
+ spin_unlock(&the_controller->lock);
+ /* end the lock */
+
+ vdev->ud.tcp_rx = kthread_get_run(vhci_rx_loop, &vdev->ud, "vhci_rx");
+ vdev->ud.tcp_tx = kthread_get_run(vhci_tx_loop, &vdev->ud, "vhci_tx");
+
+ rh_port_connect(rhport, speed);
+
+ return count;
+}
+static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach);
+
+static struct attribute *dev_attrs[] = {
+ &dev_attr_status.attr,
+ &dev_attr_detach.attr,
+ &dev_attr_attach.attr,
+ &dev_attr_usbip_debug.attr,
+ NULL,
+};
+
+const struct attribute_group dev_attr_group = {
+ .attrs = dev_attrs,
+};
--- /dev/null
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/slab.h>
+
+#include "usbip_common.h"
+#include "vhci.h"
+
+static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
+{
+ struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
+ struct vhci_device *vdev = priv->vdev;
+
+ usbip_dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
+ usb_pipedevice(urb->pipe), vdev->devid);
+
+ pdup->base.command = USBIP_CMD_SUBMIT;
+ pdup->base.seqnum = priv->seqnum;
+ pdup->base.devid = vdev->devid;
+ pdup->base.direction = usb_pipein(urb->pipe) ?
+ USBIP_DIR_IN : USBIP_DIR_OUT;
+ pdup->base.ep = usb_pipeendpoint(urb->pipe);
+
+ usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
+
+ if (urb->setup_packet)
+ memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
+}
+
+static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
+{
+ struct vhci_priv *priv, *tmp;
+
+ spin_lock(&vdev->priv_lock);
+
+ list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
+ list_move_tail(&priv->list, &vdev->priv_rx);
+ spin_unlock(&vdev->priv_lock);
+ return priv;
+ }
+
+ spin_unlock(&vdev->priv_lock);
+
+ return NULL;
+}
+
+static int vhci_send_cmd_submit(struct vhci_device *vdev)
+{
+ struct vhci_priv *priv = NULL;
+
+ struct msghdr msg;
+ struct kvec iov[3];
+ size_t txsize;
+
+ size_t total_size = 0;
+
+ while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
+ int ret;
+ struct urb *urb = priv->urb;
+ struct usbip_header pdu_header;
+ struct usbip_iso_packet_descriptor *iso_buffer = NULL;
+
+ txsize = 0;
+ memset(&pdu_header, 0, sizeof(pdu_header));
+ memset(&msg, 0, sizeof(msg));
+ memset(&iov, 0, sizeof(iov));
+
+ usbip_dbg_vhci_tx("setup txdata urb %p\n", urb);
+
+ /* 1. setup usbip_header */
+ setup_cmd_submit_pdu(&pdu_header, urb);
+ usbip_header_correct_endian(&pdu_header, 1);
+
+ iov[0].iov_base = &pdu_header;
+ iov[0].iov_len = sizeof(pdu_header);
+ txsize += sizeof(pdu_header);
+
+ /* 2. setup transfer buffer */
+ if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
+ iov[1].iov_base = urb->transfer_buffer;
+ iov[1].iov_len = urb->transfer_buffer_length;
+ txsize += urb->transfer_buffer_length;
+ }
+
+ /* 3. setup iso_packet_descriptor */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ ssize_t len = 0;
+
+ iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
+ if (!iso_buffer) {
+ usbip_event_add(&vdev->ud,
+ SDEV_EVENT_ERROR_MALLOC);
+ return -1;
+ }
+
+ iov[2].iov_base = iso_buffer;
+ iov[2].iov_len = len;
+ txsize += len;
+ }
+
+ ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
+ if (ret != txsize) {
+ pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
+ txsize);
+ kfree(iso_buffer);
+ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
+
+ kfree(iso_buffer);
+ usbip_dbg_vhci_tx("send txdata\n");
+
+ total_size += txsize;
+ }
+
+ return total_size;
+}
+
+static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
+{
+ struct vhci_unlink *unlink, *tmp;
+
+ spin_lock(&vdev->priv_lock);
+
+ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
+ list_move_tail(&unlink->list, &vdev->unlink_rx);
+ spin_unlock(&vdev->priv_lock);
+ return unlink;
+ }
+
+ spin_unlock(&vdev->priv_lock);
+
+ return NULL;
+}
+
+static int vhci_send_cmd_unlink(struct vhci_device *vdev)
+{
+ struct vhci_unlink *unlink = NULL;
+
+ struct msghdr msg;
+ struct kvec iov[3];
+ size_t txsize;
+
+ size_t total_size = 0;
+
+ while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
+ int ret;
+ struct usbip_header pdu_header;
+
+ txsize = 0;
+ memset(&pdu_header, 0, sizeof(pdu_header));
+ memset(&msg, 0, sizeof(msg));
+ memset(&iov, 0, sizeof(iov));
+
+ usbip_dbg_vhci_tx("setup cmd unlink, %lu\n", unlink->seqnum);
+
+ /* 1. setup usbip_header */
+ pdu_header.base.command = USBIP_CMD_UNLINK;
+ pdu_header.base.seqnum = unlink->seqnum;
+ pdu_header.base.devid = vdev->devid;
+ pdu_header.base.ep = 0;
+ pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
+
+ usbip_header_correct_endian(&pdu_header, 1);
+
+ iov[0].iov_base = &pdu_header;
+ iov[0].iov_len = sizeof(pdu_header);
+ txsize += sizeof(pdu_header);
+
+ ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
+ if (ret != txsize) {
+ pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
+ txsize);
+ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
+
+ usbip_dbg_vhci_tx("send txdata\n");
+
+ total_size += txsize;
+ }
+
+ return total_size;
+}
+
+int vhci_tx_loop(void *data)
+{
+ struct usbip_device *ud = data;
+ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+
+ while (!kthread_should_stop()) {
+ if (vhci_send_cmd_submit(vdev) < 0)
+ break;
+
+ if (vhci_send_cmd_unlink(vdev) < 0)
+ break;
+
+ wait_event_interruptible(vdev->waitq_tx,
+ (!list_empty(&vdev->priv_tx) ||
+ !list_empty(&vdev->unlink_tx) ||
+ kthread_should_stop()));
+
+ usbip_dbg_vhci_tx("pending urbs ?, now wake up\n");
+ }
+
+ return 0;
+}
--- /dev/null
+/*
+ * usbip.h
+ *
+ * USBIP uapi defines and function prototypes etc.
+*/
+
+#ifndef _UAPI_LINUX_USBIP_H
+#define _UAPI_LINUX_USBIP_H
+
+/* usbip device status - exported in usbip device sysfs status */
+enum usbip_device_status {
+ /* sdev is available. */
+ SDEV_ST_AVAILABLE = 0x01,
+ /* sdev is now used. */
+ SDEV_ST_USED,
+ /* sdev is unusable because of a fatal error. */
+ SDEV_ST_ERROR,
+
+ /* vdev does not connect a remote device. */
+ VDEV_ST_NULL,
+ /* vdev is used, but the USB address is not assigned yet */
+ VDEV_ST_NOTASSIGNED,
+ VDEV_ST_USED,
+ VDEV_ST_ERROR
+};
+#endif /* _UAPI_LINUX_USBIP_H */
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff