10 files changed, 646 insertions, 622 deletions

diff --git a/drivers/staging/usbip/userspace/libsrc/Makefile.am b/drivers/staging/usbip/userspace/libsrc/Makefile.am
index 77ecf6b844b7..4921189e0260 100644
--- a/drivers/staging/usbip/userspace/libsrc/Makefile.am
+++ b/drivers/staging/usbip/userspace/libsrc/Makefile.am
@@ -1,7 +1,7 @@
-libusbip_la_CPPFLAGS := -DUSBIDS_FILE='"@USBIDS_DIR@/usb.ids"'
-libusbip_la_CFLAGS   := @EXTRA_CFLAGS@
-libusbip_la_LDFLAGS  := -version-info @LIBUSBIP_VERSION@
+libusbip_la_CPPFLAGS = -DUSBIDS_FILE='"@USBIDS_DIR@/usb.ids"'
+libusbip_la_CFLAGS   = @EXTRA_CFLAGS@
+libusbip_la_LDFLAGS  = -version-info @LIBUSBIP_VERSION@
 
 lib_LTLIBRARIES := libusbip.la
-libusbip_la_SOURCES := names.c names.h stub_driver.c stub_driver.h usbip.h \
+libusbip_la_SOURCES := names.c names.h usbip_host_driver.c usbip_host_driver.h \
 		       usbip_common.c usbip_common.h vhci_driver.c vhci_driver.h
diff --git a/drivers/staging/usbip/userspace/libsrc/stub_driver.c b/drivers/staging/usbip/userspace/libsrc/stub_driver.c
deleted file mode 100644
index cc3364345f5f..000000000000
--- a/drivers/staging/usbip/userspace/libsrc/stub_driver.c
+++ /dev/null
@@ -1,391 +0,0 @@
-/*
- * Copyright (C) 2005-2007 Takahiro Hirofuchi
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include "usbip.h"
-
-/* kernel module name */
-static const char *usbip_stub_driver_name = "usbip-host";
-
-
-struct usbip_stub_driver *stub_driver;
-
-static struct sysfs_driver *open_sysfs_stub_driver(void)
-{
-	int ret;
-
-	char sysfs_mntpath[SYSFS_PATH_MAX];
-	char stub_driver_path[SYSFS_PATH_MAX];
-	struct sysfs_driver *stub_driver;
-
-
-	ret = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX);
-	if (ret < 0) {
-		err("sysfs must be mounted");
-		return NULL;
-	}
-
-	snprintf(stub_driver_path, SYSFS_PATH_MAX, "%s/%s/usb/%s/%s",
-			sysfs_mntpath, SYSFS_BUS_NAME, SYSFS_DRIVERS_NAME,
-			usbip_stub_driver_name);
-
-	stub_driver = sysfs_open_driver_path(stub_driver_path);
-	if (!stub_driver) {
-		err("usbip-core.ko and usbip-host.ko must be loaded");
-		return NULL;
-	}
-
-	return stub_driver;
-}
-
-
-#define SYSFS_OPEN_RETRIES 100
-
-/* only the first interface value is true! */
-static int32_t read_attr_usbip_status(struct usb_device *udev)
-{
-	char attrpath[SYSFS_PATH_MAX];
-	struct sysfs_attribute *attr;
-	int value = 0;
-	int  ret;
-	struct stat s;
-	int retries = SYSFS_OPEN_RETRIES;
-
-	/* This access is racy!
-	 *
-	 * Just after detach, our driver removes the sysfs
-	 * files and recreates them.
-	 *
-	 * We may try and fail to open the usbip_status of
-	 * an exported device in the (short) window where
-	 * it has been removed and not yet recreated.
-	 *
-	 * This is a bug in the interface. Nothing we can do
-	 * except work around it here by polling for the sysfs
-	 * usbip_status to reappear.
-	 */
-
-	snprintf(attrpath, SYSFS_PATH_MAX, "%s/%s:%d.%d/usbip_status",
-			udev->path, udev->busid,
-			udev->bConfigurationValue,
-			0);
-
-	while (retries > 0) {
-		if (stat(attrpath, &s) == 0)
-			break;
-
-		if (errno != ENOENT) {
-			err("error stat'ing %s", attrpath);
-			return -1;
-		}
-
-		usleep(10000); /* 10ms */
-		retries--;
-	}
-
-	if (retries == 0)
-		err("usbip_status not ready after %d retries",
-			SYSFS_OPEN_RETRIES);
-	else if (retries < SYSFS_OPEN_RETRIES)
-		info("warning: usbip_status ready after %d retries",
-			 SYSFS_OPEN_RETRIES - retries);
-
-	attr = sysfs_open_attribute(attrpath);
-	if (!attr) {
-		err("open %s", attrpath);
-		return -1;
-	}
-
-	ret = sysfs_read_attribute(attr);
-	if (ret) {
-		err("read %s", attrpath);
-		sysfs_close_attribute(attr);
-		return -1;
-	}
-
-	value = atoi(attr->value);
-
-	sysfs_close_attribute(attr);
-
-	return value;
-}
-
-
-static void usbip_exported_device_delete(void *dev)
-{
-	struct usbip_exported_device *edev =
-		(struct usbip_exported_device *) dev;
-
-	sysfs_close_device(edev->sudev);
-	free(dev);
-}
-
-
-static struct usbip_exported_device *usbip_exported_device_new(char *sdevpath)
-{
-	struct usbip_exported_device *edev = NULL;
-
-	edev = (struct usbip_exported_device *) calloc(1, sizeof(*edev));
-	if (!edev) {
-		err("alloc device");
-		return NULL;
-	}
-
-	edev->sudev = sysfs_open_device_path(sdevpath);
-	if (!edev->sudev) {
-		err("open %s", sdevpath);
-		goto err;
-	}
-
-	read_usb_device(edev->sudev, &edev->udev);
-
-	edev->status = read_attr_usbip_status(&edev->udev);
-	if (edev->status < 0)
-		goto err;
-
-	/* reallocate buffer to include usb interface data */
-	size_t size = sizeof(*edev) + edev->udev.bNumInterfaces * sizeof(struct usb_interface);
-	edev = (struct usbip_exported_device *) realloc(edev, size);
-	if (!edev) {
-		err("alloc device");
-		goto err;
-	}
-
-	for (int i=0; i < edev->udev.bNumInterfaces; i++)
-		read_usb_interface(&edev->udev, i, &edev->uinf[i]);
-
-	return edev;
-
-err:
-	if (edev && edev->sudev)
-		sysfs_close_device(edev->sudev);
-	if (edev)
-		free(edev);
-	return NULL;
-}
-
-
-static int check_new(struct dlist *dlist, struct sysfs_device *target)
-{
-	struct sysfs_device *dev;
-
-	dlist_for_each_data(dlist, dev, struct sysfs_device) {
-		if (!strncmp(dev->bus_id, target->bus_id, SYSFS_BUS_ID_SIZE))
-			/* found. not new */
-			return 0;
-	}
-
-	return 1;
-}
-
-static void delete_nothing(void *dev __attribute__((unused)))
-{
-	/* do not delete anything. but, its container will be deleted. */
-}
-
-static int refresh_exported_devices(void)
-{
-	struct sysfs_device	*suinf;  /* sysfs_device of usb_interface */
-	struct dlist		*suinf_list;
-
-	struct sysfs_device	*sudev;  /* sysfs_device of usb_device */
-	struct dlist		*sudev_list;
-
-
-	sudev_list = dlist_new_with_delete(sizeof(struct sysfs_device), delete_nothing);
-
-	suinf_list = sysfs_get_driver_devices(stub_driver->sysfs_driver);
-	if (!suinf_list) {
-		printf("Bind usbip-host.ko to a usb device to be exportable!\n");
-		goto bye;
-	}
-
-	/* collect unique USB devices (not interfaces) */
-	dlist_for_each_data(suinf_list, suinf, struct sysfs_device) {
-
-		/* get usb device of this usb interface */
-		sudev = sysfs_get_device_parent(suinf);
-		if (!sudev) {
-			err("get parent dev of %s", suinf->name);
-			continue;
-		}
-
-		if (check_new(sudev_list, sudev)) {
-			dlist_unshift(sudev_list, sudev);
-		}
-	}
-
-	dlist_for_each_data(sudev_list, sudev, struct sysfs_device) {
-		struct usbip_exported_device *edev;
-
-		edev = usbip_exported_device_new(sudev->path);
-		if (!edev) {
-			err("usbip_exported_device new");
-			continue;
-		}
-
-		dlist_unshift(stub_driver->edev_list, (void *) edev);
-		stub_driver->ndevs++;
-	}
-
-
-	dlist_destroy(sudev_list);
-
-bye:
-
-	return 0;
-}
-
-int usbip_stub_refresh_device_list(void)
-{
-	int ret;
-
-	if (stub_driver->edev_list)
-		dlist_destroy(stub_driver->edev_list);
-
-	stub_driver->ndevs = 0;
-
-	stub_driver->edev_list = dlist_new_with_delete(sizeof(struct usbip_exported_device),
-			usbip_exported_device_delete);
-	if (!stub_driver->edev_list) {
-		err("alloc dlist");
-		return -1;
-	}
-
-	ret = refresh_exported_devices();
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-int usbip_stub_driver_open(void)
-{
-	int ret;
-
-
-	stub_driver = (struct usbip_stub_driver *) calloc(1, sizeof(*stub_driver));
-	if (!stub_driver) {
-		err("alloc stub_driver");
-		return -1;
-	}
-
-	stub_driver->ndevs = 0;
-
-	stub_driver->edev_list = dlist_new_with_delete(sizeof(struct usbip_exported_device),
-			usbip_exported_device_delete);
-	if (!stub_driver->edev_list) {
-		err("alloc dlist");
-		goto err;
-	}
-
-	stub_driver->sysfs_driver = open_sysfs_stub_driver();
-	if (!stub_driver->sysfs_driver)
-		goto err;
-
-	ret = refresh_exported_devices();
-	if (ret < 0)
-		goto err;
-
-	return 0;
-
-
-err:
-	if (stub_driver->sysfs_driver)
-		sysfs_close_driver(stub_driver->sysfs_driver);
-	if (stub_driver->edev_list)
-		dlist_destroy(stub_driver->edev_list);
-	free(stub_driver);
-
-	stub_driver = NULL;
-	return -1;
-}
-
-
-void usbip_stub_driver_close(void)
-{
-	if (!stub_driver)
-		return;
-
-	if (stub_driver->edev_list)
-		dlist_destroy(stub_driver->edev_list);
-	if (stub_driver->sysfs_driver)
-		sysfs_close_driver(stub_driver->sysfs_driver);
-	free(stub_driver);
-
-	stub_driver = NULL;
-}
-
-int usbip_stub_export_device(struct usbip_exported_device *edev, int sockfd)
-{
-	char attrpath[SYSFS_PATH_MAX];
-	struct sysfs_attribute *attr;
-	char sockfd_buff[30];
-	int ret;
-
-
-	if (edev->status != SDEV_ST_AVAILABLE) {
-		info("device not available, %s", edev->udev.busid);
-		switch( edev->status ) {
-			case SDEV_ST_ERROR:
-				info("     status SDEV_ST_ERROR");
-				break;
-			case SDEV_ST_USED:
-				info("     status SDEV_ST_USED");
-				break;
-			default:
-				info("     status unknown: 0x%x", edev->status);
-		}
-		return -1;
-	}
-
-	/* only the first interface is true */
-	snprintf(attrpath, sizeof(attrpath), "%s/%s:%d.%d/%s",
-			edev->udev.path,
-			edev->udev.busid,
-			edev->udev.bConfigurationValue, 0,
-			"usbip_sockfd");
-
-	attr = sysfs_open_attribute(attrpath);
-	if (!attr) {
-		err("open %s", attrpath);
-		return -1;
-	}
-
-	snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
-
-	dbg("write: %s", sockfd_buff);
-
-	ret = sysfs_write_attribute(attr, sockfd_buff, strlen(sockfd_buff));
-	if (ret < 0) {
-		err("write sockfd %s to %s", sockfd_buff, attrpath);
-		goto err_write_sockfd;
-	}
-
-	info("connect %s", edev->udev.busid);
-
-err_write_sockfd:
-	sysfs_close_attribute(attr);
-
-	return ret;
-}
-
-struct usbip_exported_device *usbip_stub_get_device(int num)
-{
-	struct usbip_exported_device *edev;
-	struct dlist		*dlist = stub_driver->edev_list;
-	int count = 0;
-
-	dlist_for_each_data(dlist, edev, struct usbip_exported_device) {
-		if (num == count)
-			return edev;
-		else
-			count++ ;
-	}
-
-	return NULL;
-}
diff --git a/drivers/staging/usbip/userspace/libsrc/stub_driver.h b/drivers/staging/usbip/userspace/libsrc/stub_driver.h
deleted file mode 100644
index 3107d18de65a..000000000000
--- a/drivers/staging/usbip/userspace/libsrc/stub_driver.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2005-2007 Takahiro Hirofuchi
- */
-
-#ifndef _USBIP_STUB_DRIVER_H
-#define _USBIP_STUB_DRIVER_H
-
-#include "usbip.h"
-
-
-struct usbip_stub_driver {
-	int ndevs;
-	struct sysfs_driver *sysfs_driver;
-
-	struct dlist *edev_list;	/* list of exported device */
-};
-
-struct usbip_exported_device {
-	struct sysfs_device *sudev;
-
-	int32_t status;
-	struct usb_device    udev;
-	struct usb_interface uinf[];
-};
-
-
-extern struct usbip_stub_driver *stub_driver;
-
-int usbip_stub_driver_open(void);
-void usbip_stub_driver_close(void);
-
-int usbip_stub_refresh_device_list(void);
-int usbip_stub_export_device(struct usbip_exported_device *edev, int sockfd);
-
-struct usbip_exported_device *usbip_stub_get_device(int num);
-#endif
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip.h b/drivers/staging/usbip/userspace/libsrc/usbip.h
deleted file mode 100644
index 7cb8e6fef35d..000000000000
--- a/drivers/staging/usbip/userspace/libsrc/usbip.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (C) 2005-2007 Takahiro Hirofuchi
- */
-
-#ifndef _USBIP_H
-#define _USBIP_H
-
-#ifdef HAVE_CONFIG_H
-#include "../config.h"
-#endif
-
-#include "usbip_common.h"
-#include "stub_driver.h"
-#include "vhci_driver.h"
-#ifdef DMALLOC
-#include <dmalloc.h>
-#endif
-
-#endif
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_common.c b/drivers/staging/usbip/userspace/libsrc/usbip_common.c
index a128a924b27e..154b4b1103ec 100644
--- a/drivers/staging/usbip/userspace/libsrc/usbip_common.c
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_common.c
@@ -2,9 +2,12 @@
  * Copyright (C) 2005-2007 Takahiro Hirofuchi
  */
 
-#include "usbip.h"
+#include "usbip_common.h"
 #include "names.h"
 
+#undef  PROGNAME
+#define PROGNAME "libusbip"
+
 int usbip_use_syslog = 0;
 int usbip_use_stderr = 0;
 int usbip_use_debug  = 0;
@@ -64,7 +67,7 @@ const char *usbip_speed_string(int num)
 #define DBG_UINF_INTEGER(name)\
 	dbg("%-20s = %x", to_string(name), (int) uinf->name)
 
-void dump_usb_interface(struct usb_interface *uinf)
+void dump_usb_interface(struct usbip_usb_interface *uinf)
 {
 	char buff[100];
 	usbip_names_get_class(buff, sizeof(buff),
@@ -74,7 +77,7 @@ void dump_usb_interface(struct usb_interface *uinf)
 	dbg("%-20s = %s", "Interface(C/SC/P)", buff);
 }
 
-void dump_usb_device(struct usb_device *udev)
+void dump_usb_device(struct usbip_usb_device *udev)
 {
 	char buff[100];
 
@@ -117,19 +120,19 @@ int read_attr_value(struct sysfs_device *dev, const char *name, const char *form
 
 	attr = sysfs_open_attribute(attrpath);
 	if (!attr) {
-		err("open attr %s", attrpath);
+		dbg("sysfs_open_attribute failed: %s", attrpath);
 		return 0;
 	}
 
 	ret = sysfs_read_attribute(attr);
 	if (ret < 0) {
-		err("read attr");
+		dbg("sysfs_read_attribute failed");
 		goto err;
 	}
 
 	ret = sscanf(attr->value, format, &num);
 	if (ret < 1) {
-		err("sscanf");
+		dbg("sscanf failed");
 		goto err;
 	}
 
@@ -151,19 +154,19 @@ int read_attr_speed(struct sysfs_device *dev)
 
 	attr = sysfs_open_attribute(attrpath);
 	if (!attr) {
-		err("open attr");
+		dbg("sysfs_open_attribute failed: %s", attrpath);
 		return 0;
 	}
 
 	ret = sysfs_read_attribute(attr);
 	if (ret < 0) {
-		err("read attr");
+		dbg("sysfs_read_attribute failed");
 		goto err;
 	}
 
 	ret = sscanf(attr->value, "%s\n", speed);
 	if (ret < 1) {
-		err("sscanf");
+		dbg("sscanf failed");
 		goto err;
 	}
 err:
@@ -181,7 +184,7 @@ err:
 	do { (object)->name = (type) read_attr_value(dev, to_string(name), format); } while (0)
 
 
-int read_usb_device(struct sysfs_device *sdev, struct usb_device *udev)
+int read_usb_device(struct sysfs_device *sdev, struct usbip_usb_device *udev)
 {
 	uint32_t busnum, devnum;
 
@@ -209,7 +212,8 @@ int read_usb_device(struct sysfs_device *sdev, struct usb_device *udev)
 	return 0;
 }
 
-int read_usb_interface(struct usb_device *udev, int i, struct usb_interface *uinf)
+int read_usb_interface(struct usbip_usb_device *udev, int i,
+		       struct usbip_usb_interface *uinf)
 {
 	char busid[SYSFS_BUS_ID_SIZE];
 	struct sysfs_device *sif;
@@ -218,7 +222,7 @@ int read_usb_interface(struct usb_device *udev, int i, struct usb_interface *uin
 
 	sif = sysfs_open_device("usb", busid);
 	if (!sif) {
-		err("open sif of %s", busid);
+		dbg("sysfs_open_device(\"usb\", \"%s\") failed", busid);
 		return -1;
 	}
 
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_common.h b/drivers/staging/usbip/userspace/libsrc/usbip_common.h
index c254b5481f7c..eedefbd12ea6 100644
--- a/drivers/staging/usbip/userspace/libsrc/usbip_common.h
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_common.h
@@ -2,21 +2,18 @@
  * Copyright (C) 2005-2007 Takahiro Hirofuchi
  */
 
-#ifndef _USBIP_COMMON_H
-#define _USBIP_COMMON_H
+#ifndef __USBIP_COMMON_H
+#define __USBIP_COMMON_H
+
+#include <sysfs/libsysfs.h>
 
-#include <unistd.h>
 #include <stdint.h>
-#include <syslog.h>
-#include <errno.h>
 #include <stdio.h>
-#include <string.h>
 #include <stdlib.h>
-#include <strings.h>
+#include <string.h>
 
-#include <sysfs/libsysfs.h>
-#include <netdb.h>
-#include <sys/socket.h>
+#include <syslog.h>
+#include <unistd.h>
 
 #ifndef USBIDS_FILE
 #define USBIDS_FILE "/usr/share/hwdata/usb.ids"
@@ -26,7 +23,59 @@
 #define VHCI_STATE_PATH "/var/run/vhci_hcd"
 #endif
 
-//#include <linux/usb_ch9.h>
+/* kernel module names */
+#define USBIP_CORE_MOD_NAME	"usbip-core"
+#define USBIP_HOST_DRV_NAME	"usbip-host"
+#define USBIP_VHCI_DRV_NAME	"vhci_hcd"
+
+extern int usbip_use_syslog;
+extern int usbip_use_stderr;
+extern int usbip_use_debug ;
+
+#define PROGNAME "usbip"
+
+#define pr_fmt(fmt)	"%s: %s: " fmt "\n", PROGNAME
+#define dbg_fmt(fmt)	pr_fmt("%s:%d:[%s] " fmt), "debug",	\
+		        __FILE__, __LINE__, __FUNCTION__
+
+#define err(fmt, args...)						\
+	do {								\
+		if (usbip_use_syslog) {					\
+			syslog(LOG_ERR, pr_fmt(fmt), "error", ##args);	\
+		}							\
+		if (usbip_use_stderr) {					\
+			fprintf(stderr, pr_fmt(fmt), "error", ##args);	\
+		}							\
+	} while (0)
+
+#define info(fmt, args...)						\
+	do {								\
+		if (usbip_use_syslog) {					\
+			syslog(LOG_INFO, pr_fmt(fmt), "info", ##args);	\
+		}							\
+		if (usbip_use_stderr) {					\
+			fprintf(stderr, pr_fmt(fmt), "info", ##args);	\
+		}							\
+	} while (0)
+
+#define dbg(fmt, args...)						\
+	do {								\
+	if (usbip_use_debug) {						\
+		if (usbip_use_syslog) {					\
+			syslog(LOG_DEBUG, dbg_fmt(fmt), ##args);	\
+		}							\
+		if (usbip_use_stderr) {					\
+			fprintf(stderr, dbg_fmt(fmt), ##args);		\
+		}							\
+	}								\
+	} while (0)
+
+#define BUG()						\
+	do {						\
+		err("sorry, it's a bug!");		\
+		abort();				\
+	} while (0)
+
 enum usb_device_speed {
 	USB_SPEED_UNKNOWN = 0,                  /* enumerating */
 	USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
@@ -51,66 +100,14 @@ enum usbip_device_status{
 	VDEV_ST_ERROR
 };
 
-extern int usbip_use_syslog;
-extern int usbip_use_stderr;
-extern int usbip_use_debug ;
-
-#define err(fmt, args...)	do { \
-	if (usbip_use_syslog) { \
-		syslog(LOG_ERR, "usbip err: %13s:%4d (%-12s) " fmt "\n", \
-			__FILE__, __LINE__, __FUNCTION__,  ##args); \
-	} \
-	if (usbip_use_stderr) { \
-		fprintf(stderr, "usbip err: %13s:%4d (%-12s) " fmt "\n", \
-			__FILE__, __LINE__, __FUNCTION__,  ##args); \
-	} \
-} while (0)
-
-#define notice(fmt, args...)	do { \
-	if (usbip_use_syslog) { \
-		syslog(LOG_DEBUG, "usbip: " fmt, ##args); \
-	} \
-	if (usbip_use_stderr) { \
-		fprintf(stderr, "usbip: " fmt "\n",  ##args); \
-	} \
-} while (0)
-
-#define info(fmt, args...)	do { \
-	if (usbip_use_syslog) { \
-		syslog(LOG_DEBUG, fmt, ##args); \
-	} \
-	if (usbip_use_stderr) { \
-		fprintf(stderr, fmt "\n",  ##args); \
-	} \
-} while (0)
-
-#define dbg(fmt, args...)	do { \
-	if (usbip_use_debug) { \
-		if (usbip_use_syslog) { \
-			syslog(LOG_DEBUG, "usbip dbg: %13s:%4d (%-12s) " fmt, \
-				__FILE__, __LINE__, __FUNCTION__,  ##args); \
-		} \
-		if (usbip_use_stderr) { \
-			fprintf(stderr, "usbip dbg: %13s:%4d (%-12s) " fmt "\n", \
-				__FILE__, __LINE__, __FUNCTION__,  ##args); \
-		} \
-	} \
-} while (0)
-
-
-#define BUG()	do { err("sorry, it's a bug"); abort(); } while (0)
-
-
-struct usb_interface {
+struct usbip_usb_interface {
 	uint8_t bInterfaceClass;
 	uint8_t bInterfaceSubClass;
 	uint8_t bInterfaceProtocol;
 	uint8_t padding;	/* alignment */
 } __attribute__((packed));
 
-
-
-struct usb_device {
+struct usbip_usb_device {
 	char path[SYSFS_PATH_MAX];
 	char busid[SYSFS_BUS_ID_SIZE];
 
@@ -132,11 +129,12 @@ struct usb_device {
 
 #define to_string(s)	#s
 
-void dump_usb_interface(struct usb_interface *);
-void dump_usb_device(struct usb_device *);
-int read_usb_device(struct sysfs_device *sdev, struct usb_device *udev);
+void dump_usb_interface(struct usbip_usb_interface *);
+void dump_usb_device(struct usbip_usb_device *);
+int read_usb_device(struct sysfs_device *sdev, struct usbip_usb_device *udev);
 int read_attr_value(struct sysfs_device *dev, const char *name, const char *format);
-int read_usb_interface(struct usb_device *udev, int i, struct usb_interface *uinf);
+int read_usb_interface(struct usbip_usb_device *udev, int i,
+		       struct usbip_usb_interface *uinf);
 
 const char *usbip_speed_string(int num);
 const char *usbip_status_string(int32_t status);
@@ -146,4 +144,4 @@ void usbip_names_free(void);
 void usbip_names_get_product(char *buff, size_t size, uint16_t vendor, uint16_t product);
 void usbip_names_get_class(char *buff, size_t size, uint8_t class, uint8_t subclass, uint8_t protocol);
 
-#endif
+#endif /* __USBIP_COMMON_H */
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
new file mode 100644
index 000000000000..71a449cf50db
--- /dev/null
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
@@ -0,0 +1,401 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "usbip_common.h"
+#include "usbip_host_driver.h"
+
+#undef  PROGNAME
+#define PROGNAME "libusbip"
+
+struct usbip_host_driver *host_driver;
+
+#define SYSFS_OPEN_RETRIES 100
+
+/* only the first interface value is true! */
+static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
+{
+	char attrpath[SYSFS_PATH_MAX];
+	struct sysfs_attribute *attr;
+	int value = 0;
+	int rc;
+	struct stat s;
+	int retries = SYSFS_OPEN_RETRIES;
+
+	/* This access is racy!
+	 *
+	 * Just after detach, our driver removes the sysfs
+	 * files and recreates them.
+	 *
+	 * We may try and fail to open the usbip_status of
+	 * an exported device in the (short) window where
+	 * it has been removed and not yet recreated.
+	 *
+	 * This is a bug in the interface. Nothing we can do
+	 * except work around it here by polling for the sysfs
+	 * usbip_status to reappear.
+	 */
+
+	snprintf(attrpath, SYSFS_PATH_MAX, "%s/%s:%d.%d/usbip_status",
+		 udev->path, udev->busid, udev->bConfigurationValue, 0);
+
+	while (retries > 0) {
+		if (stat(attrpath, &s) == 0)
+			break;
+
+		if (errno != ENOENT) {
+			dbg("stat failed: %s", attrpath);
+			return -1;
+		}
+
+		usleep(10000); /* 10ms */
+		retries--;
+	}
+
+	if (retries == 0)
+		dbg("usbip_status not ready after %d retries",
+		    SYSFS_OPEN_RETRIES);
+	else if (retries < SYSFS_OPEN_RETRIES)
+		dbg("warning: usbip_status ready after %d retries",
+		    SYSFS_OPEN_RETRIES - retries);
+
+	attr = sysfs_open_attribute(attrpath);
+	if (!attr) {
+		dbg("sysfs_open_attribute failed: %s", attrpath);
+		return -1;
+	}
+
+	rc = sysfs_read_attribute(attr);
+	if (rc) {
+		dbg("sysfs_read_attribute failed: %s", attrpath);
+		sysfs_close_attribute(attr);
+		return -1;
+	}
+
+	value = atoi(attr->value);
+
+	sysfs_close_attribute(attr);
+
+	return value;
+}
+
+static struct usbip_exported_device *usbip_exported_device_new(char *sdevpath)
+{
+	struct usbip_exported_device *edev = NULL;
+	size_t size;
+	int i;
+
+	edev = calloc(1, sizeof(*edev));
+	if (!edev) {
+		dbg("calloc failed");
+		return NULL;
+	}
+
+	edev->sudev = sysfs_open_device_path(sdevpath);
+	if (!edev->sudev) {
+		dbg("sysfs_open_device_path failed: %s", sdevpath);
+		goto err;
+	}
+
+	read_usb_device(edev->sudev, &edev->udev);
+
+	edev->status = read_attr_usbip_status(&edev->udev);
+	if (edev->status < 0)
+		goto err;
+
+	/* reallocate buffer to include usb interface data */
+	size = sizeof(*edev) + edev->udev.bNumInterfaces *
+		sizeof(struct usbip_usb_interface);
+
+	edev = realloc(edev, size);
+	if (!edev) {
+		dbg("realloc failed");
+		goto err;
+	}
+
+	for (i = 0; i < edev->udev.bNumInterfaces; i++)
+		read_usb_interface(&edev->udev, i, &edev->uinf[i]);
+
+	return edev;
+err:
+	if (edev && edev->sudev)
+		sysfs_close_device(edev->sudev);
+	if (edev)
+		free(edev);
+
+	return NULL;
+}
+
+static int check_new(struct dlist *dlist, struct sysfs_device *target)
+{
+	struct sysfs_device *dev;
+
+	dlist_for_each_data(dlist, dev, struct sysfs_device) {
+		if (!strncmp(dev->bus_id, target->bus_id, SYSFS_BUS_ID_SIZE))
+			/* device found and is not new */
+			return 0;
+	}
+	return 1;
+}
+
+static void delete_nothing(void *unused_data)
+{
+	/*
+	 * NOTE: Do not delete anything, but the container will be deleted.
+	 */
+	(void) unused_data;
+}
+
+static int refresh_exported_devices(void)
+{
+	/* sysfs_device of usb_interface */
+	struct sysfs_device	*suintf;
+	struct dlist		*suintf_list;
+	/* sysfs_device of usb_device */
+	struct sysfs_device	*sudev;
+	struct dlist		*sudev_list;
+	struct usbip_exported_device *edev;
+
+	sudev_list = dlist_new_with_delete(sizeof(struct sysfs_device),
+					   delete_nothing);
+
+	suintf_list = sysfs_get_driver_devices(host_driver->sysfs_driver);
+	if (!suintf_list) {
+		/*
+		 * Not an error condition. There are simply no devices bound to
+		 * the driver yet.
+		 */
+		dbg("bind " USBIP_HOST_DRV_NAME ".ko to a usb device to be "
+		    "exportable!");
+		return 0;
+	}
+
+	/* collect unique USB devices (not interfaces) */
+	dlist_for_each_data(suintf_list, suintf, struct sysfs_device) {
+		/* get usb device of this usb interface */
+		sudev = sysfs_get_device_parent(suintf);
+		if (!sudev) {
+			dbg("sysfs_get_device_parent failed: %s", suintf->name);
+			continue;
+		}
+
+		if (check_new(sudev_list, sudev)) {
+			/* insert item at head of list */
+			dlist_unshift(sudev_list, sudev);
+		}
+	}
+
+	dlist_for_each_data(sudev_list, sudev, struct sysfs_device) {
+		edev = usbip_exported_device_new(sudev->path);
+		if (!edev) {
+			dbg("usbip_exported_device_new failed");
+			continue;
+		}
+
+		dlist_unshift(host_driver->edev_list, edev);
+		host_driver->ndevs++;
+	}
+
+	dlist_destroy(sudev_list);
+
+	return 0;
+}
+
+static struct sysfs_driver *open_sysfs_host_driver(void)
+{
+	char bus_type[] = "usb";
+	char sysfs_mntpath[SYSFS_PATH_MAX];
+	char host_drv_path[SYSFS_PATH_MAX];
+	struct sysfs_driver *host_drv;
+	int rc;
+
+	rc = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX);
+	if (rc < 0) {
+		dbg("sysfs_get_mnt_path failed");
+		return NULL;
+	}
+
+	snprintf(host_drv_path, SYSFS_PATH_MAX, "%s/%s/%s/%s/%s",
+		 sysfs_mntpath, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
+		 USBIP_HOST_DRV_NAME);
+
+	host_drv = sysfs_open_driver_path(host_drv_path);
+	if (!host_drv) {
+		dbg("sysfs_open_driver_path failed");
+		return NULL;
+	}
+
+	return host_drv;
+}
+
+static void usbip_exported_device_delete(void *dev)
+{
+	struct usbip_exported_device *edev = dev;
+	sysfs_close_device(edev->sudev);
+	free(dev);
+}
+
+int usbip_host_driver_open(void)
+{
+	int rc;
+
+	host_driver = calloc(1, sizeof(*host_driver));
+	if (!host_driver) {
+		dbg("calloc failed");
+		return -1;
+	}
+
+	host_driver->ndevs = 0;
+	host_driver->edev_list =
+		dlist_new_with_delete(sizeof(struct usbip_exported_device),
+				      usbip_exported_device_delete);
+	if (!host_driver->edev_list) {
+		dbg("dlist_new_with_delete failed");
+		goto err_free_host_driver;
+	}
+
+	host_driver->sysfs_driver = open_sysfs_host_driver();
+	if (!host_driver->sysfs_driver)
+		goto err_destroy_edev_list;
+
+	rc = refresh_exported_devices();
+	if (rc < 0)
+		goto err_close_sysfs_driver;
+
+	return 0;
+
+err_close_sysfs_driver:
+	sysfs_close_driver(host_driver->sysfs_driver);
+err_destroy_edev_list:
+	dlist_destroy(host_driver->edev_list);
+err_free_host_driver:
+	free(host_driver);
+	host_driver = NULL;
+
+	return -1;
+}
+
+void usbip_host_driver_close(void)
+{
+	if (!host_driver)
+		return;
+
+	if (host_driver->edev_list)
+		dlist_destroy(host_driver->edev_list);
+	if (host_driver->sysfs_driver)
+		sysfs_close_driver(host_driver->sysfs_driver);
+
+	free(host_driver);
+	host_driver = NULL;
+}
+
+int usbip_host_refresh_device_list(void)
+{
+	int rc;
+
+	if (host_driver->edev_list)
+		dlist_destroy(host_driver->edev_list);
+
+	host_driver->ndevs = 0;
+	host_driver->edev_list =
+		dlist_new_with_delete(sizeof(struct usbip_exported_device),
+				      usbip_exported_device_delete);
+	if (!host_driver->edev_list) {
+		dbg("dlist_new_with_delete failed");
+		return -1;
+	}
+
+	rc = refresh_exported_devices();
+	if (rc < 0)
+		return -1;
+
+	return 0;
+}
+
+int usbip_host_export_device(struct usbip_exported_device *edev, int sockfd)
+{
+	char attr_name[] = "usbip_sockfd";
+	char attr_path[SYSFS_PATH_MAX];
+	struct sysfs_attribute *attr;
+	char sockfd_buff[30];
+	int ret;
+
+	if (edev->status != SDEV_ST_AVAILABLE) {
+		dbg("device not available: %s", edev->udev.busid);
+		switch (edev->status) {
+		case SDEV_ST_ERROR:
+			dbg("status SDEV_ST_ERROR");
+			break;
+		case SDEV_ST_USED:
+			dbg("status SDEV_ST_USED");
+			break;
+		default:
+			dbg("status unknown: 0x%x", edev->status);
+		}
+		return -1;
+	}
+
+	/* only the first interface is true */
+	snprintf(attr_path, sizeof(attr_path), "%s/%s:%d.%d/%s",
+		 edev->udev.path, edev->udev.busid,
+		 edev->udev.bConfigurationValue, 0, attr_name);
+
+	attr = sysfs_open_attribute(attr_path);
+	if (!attr) {
+		dbg("sysfs_open_attribute failed: %s", attr_path);
+		return -1;
+	}
+
+	snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
+	dbg("write: %s", sockfd_buff);
+
+	ret = sysfs_write_attribute(attr, sockfd_buff, strlen(sockfd_buff));
+	if (ret < 0) {
+		dbg("sysfs_write_attribute failed: sockfd %s to %s",
+		    sockfd_buff, attr_path);
+		goto err_write_sockfd;
+	}
+
+	dbg("connect: %s", edev->udev.busid);
+
+err_write_sockfd:
+	sysfs_close_attribute(attr);
+
+	return ret;
+}
+
+struct usbip_exported_device *usbip_host_get_device(int num)
+{
+	struct usbip_exported_device *edev;
+	struct dlist *dlist = host_driver->edev_list;
+	int cnt = 0;
+
+	dlist_for_each_data(dlist, edev, struct usbip_exported_device) {
+		if (num == cnt)
+			return edev;
+		else
+			cnt++;
+	}
+
+	return NULL;
+}
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.h b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.h
new file mode 100644
index 000000000000..34fd14cbfc49
--- /dev/null
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_host_driver.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ *               2005-2007 Takahiro Hirofuchi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __USBIP_HOST_DRIVER_H
+#define __USBIP_HOST_DRIVER_H
+
+#include <stdint.h>
+#include "usbip_common.h"
+
+struct usbip_host_driver {
+	int ndevs;
+	struct sysfs_driver *sysfs_driver;
+	/* list of exported device */
+	struct dlist *edev_list;
+};
+
+struct usbip_exported_device {
+	struct sysfs_device *sudev;
+	int32_t status;
+	struct usbip_usb_device udev;
+	struct usbip_usb_interface uinf[];
+};
+
+extern struct usbip_host_driver *host_driver;
+
+int usbip_host_driver_open(void);
+void usbip_host_driver_close(void);
+
+int usbip_host_refresh_device_list(void);
+int usbip_host_export_device(struct usbip_exported_device *edev, int sockfd);
+struct usbip_exported_device *usbip_host_get_device(int num);
+
+#endif /* __USBIP_HOST_DRIVER_H */
diff --git a/drivers/staging/usbip/userspace/libsrc/vhci_driver.c b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
index db43f8d2eb80..abbc285f4339 100644
--- a/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
+++ b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
@@ -2,11 +2,11 @@
  * Copyright (C) 2005-2007 Takahiro Hirofuchi
  */
 
+#include "usbip_common.h"
+#include "vhci_driver.h"
 
-#include "usbip.h"
-
-
-static const char vhci_driver_name[] = "vhci_hcd";
+#undef  PROGNAME
+#define PROGNAME "libusbip"
 
 struct usbip_vhci_driver *vhci_driver;
 
@@ -16,17 +16,19 @@ static struct usbip_imported_device *imported_device_init(struct usbip_imported_
 
 	sudev = sysfs_open_device("usb", busid);
 	if (!sudev) {
-		err("sysfs_open_device %s", busid);
+		dbg("sysfs_open_device failed: %s", busid);
 		goto err;
 	}
 	read_usb_device(sudev, &idev->udev);
 	sysfs_close_device(sudev);
 
 	/* add class devices of this imported device */
-	struct class_device *cdev;
-	dlist_for_each_data(vhci_driver->cdev_list, cdev, struct class_device) {
-		if (!strncmp(cdev->devpath, idev->udev.path, strlen(idev->udev.path))) {
-			struct class_device *new_cdev;
+	struct usbip_class_device *cdev;
+	dlist_for_each_data(vhci_driver->cdev_list, cdev,
+			    struct usbip_class_device) {
+		if (!strncmp(cdev->dev_path, idev->udev.path,
+			     strlen(idev->udev.path))) {
+			struct usbip_class_device *new_cdev;
 
 			/* alloc and copy because dlist is linked from only one list */
 			new_cdev = calloc(1, sizeof(*new_cdev));
@@ -53,7 +55,7 @@ static int parse_status(char *value)
 
 
 	for (int i = 0; i < vhci_driver->nports; i++)
-		bzero(&vhci_driver->idev[i], sizeof(struct usbip_imported_device));
+		memset(&vhci_driver->idev[i], 0, sizeof(vhci_driver->idev[i]));
 
 
 	/* skip a header line */
@@ -69,7 +71,7 @@ static int parse_status(char *value)
 				&devid, &socket, lbusid);
 
 		if (ret < 5) {
-			err("scanf %d", ret);
+			dbg("sscanf failed: %d", ret);
 			BUG();
 		}
 
@@ -90,16 +92,16 @@ static int parse_status(char *value)
 			idev->busnum	= (devid >> 16);
 			idev->devnum	= (devid & 0x0000ffff);
 
-			idev->cdev_list = dlist_new(sizeof(struct class_device));
+			idev->cdev_list = dlist_new(sizeof(struct usbip_class_device));
 			if (!idev->cdev_list) {
-				err("init new device");
+				dbg("dlist_new failed");
 				return -1;
 			}
 
 			if (idev->status != VDEV_ST_NULL && idev->status != VDEV_ST_NOTASSIGNED) {
 				idev = imported_device_init(idev, lbusid);
 				if (!idev) {
-					err("init new device");
+					dbg("imported_device_init failed");
 					return -1;
 				}
 			}
@@ -118,29 +120,29 @@ static int parse_status(char *value)
 
 static int check_usbip_device(struct sysfs_class_device *cdev)
 {
-	char clspath[SYSFS_PATH_MAX];	/* /sys/class/video4linux/video0/device     */
-	char devpath[SYSFS_PATH_MAX];	/* /sys/devices/platform/vhci_hcd/usb6/6-1:1.1  */
-
+	char class_path[SYSFS_PATH_MAX]; /* /sys/class/video4linux/video0/device */
+	char dev_path[SYSFS_PATH_MAX];	 /* /sys/devices/platform/vhci_hcd/usb6/6-1:1.1 */
 	int ret;
+	struct usbip_class_device *usbip_cdev;
 
-	snprintf(clspath, sizeof(clspath), "%s/device", cdev->path);
+	snprintf(class_path, sizeof(class_path), "%s/device", cdev->path);
 
-	ret = sysfs_get_link(clspath, devpath, SYSFS_PATH_MAX);
-	if (!ret) {
-		if (!strncmp(devpath, vhci_driver->hc_device->path,
-					strlen(vhci_driver->hc_device->path))) {
+	ret = sysfs_get_link(class_path, dev_path, sizeof(dev_path));
+	if (ret == 0) {
+		if (!strncmp(dev_path, vhci_driver->hc_device->path,
+			     strlen(vhci_driver->hc_device->path))) {
 			/* found usbip device */
-			struct class_device *cdev;
-
-			cdev = calloc(1, sizeof(*cdev));
+			usbip_cdev = calloc(1, sizeof(*usbip_cdev));
 			if (!cdev) {
-				err("calloc cdev");
+				dbg("calloc failed");
 				return -1;
 			}
-			dlist_unshift(vhci_driver->cdev_list, (void*) cdev);
-			strncpy(cdev->clspath, clspath, sizeof(cdev->clspath));
-			strncpy(cdev->devpath, devpath, sizeof(cdev->clspath));
-			dbg("  found %s %s", clspath, devpath);
+			dlist_unshift(vhci_driver->cdev_list, usbip_cdev);
+			strncpy(usbip_cdev->class_path, class_path,
+				sizeof(usbip_cdev->class_path));
+			strncpy(usbip_cdev->dev_path, dev_path,
+				sizeof(usbip_cdev->dev_path));
+			dbg("found: %s %s", class_path, dev_path);
 		}
 	}
 
@@ -157,11 +159,11 @@ static int search_class_for_usbip_device(char *cname)
 
 	class = sysfs_open_class(cname);
 	if (!class) {
-		err("open class");
+		dbg("sysfs_open_class failed");
 		return -1;
 	}
 
-	dbg("class %s", class->name);
+	dbg("class: %s", class->name);
 
 	cdev_list = sysfs_get_class_devices(class);
 	if (!cdev_list)
@@ -169,7 +171,7 @@ static int search_class_for_usbip_device(char *cname)
 		goto out;
 
 	dlist_for_each_data(cdev_list, cdev, struct sysfs_class_device) {
-		dbg("   cdev %s", cdev->name);
+		dbg("cdev: %s", cdev->name);
 		ret = check_usbip_device(cdev);
 		if (ret < 0)
 			goto out;
@@ -187,11 +189,22 @@ static int refresh_class_device_list(void)
 	int ret;
 	struct dlist *cname_list;
 	char *cname;
+	char sysfs_mntpath[SYSFS_PATH_MAX];
+	char class_path[SYSFS_PATH_MAX];
+
+	ret = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX);
+	if (ret < 0) {
+		dbg("sysfs_get_mnt_path failed");
+		return -1;
+	}
+
+	snprintf(class_path, sizeof(class_path), "%s/%s", sysfs_mntpath,
+		 SYSFS_CLASS_NAME);
 
 	/* search under /sys/class */
-	cname_list = sysfs_open_directory_list("/sys/class");
+	cname_list = sysfs_open_directory_list(class_path);
 	if (!cname_list) {
-		err("open class directory");
+		dbg("sysfs_open_directory failed");
 		return -1;
 	}
 
@@ -221,45 +234,42 @@ static int refresh_imported_device_list(void)
 
 	attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
 	if (!attr_status) {
-		err("get attr %s of %s", "status", vhci_driver->hc_device->name);
+		dbg("sysfs_get_device_attr(\"status\") failed: %s",
+		    vhci_driver->hc_device->name);
 		return -1;
 	}
 
-	dbg("name %s, path %s, len %d, method %d\n", attr_status->name,
-			attr_status->path, attr_status->len, attr_status->method);
-
-	dbg("%s", attr_status->value);
+	dbg("name: %s  path: %s  len: %d  method: %d  value: %s",
+	    attr_status->name, attr_status->path, attr_status->len,
+	    attr_status->method, attr_status->value);
 
 	return parse_status(attr_status->value);
 }
 
 static int get_nports(void)
 {
+	char *c;
 	int nports = 0;
 	struct sysfs_attribute *attr_status;
 
 	attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
 	if (!attr_status) {
-		err("get attr %s of %s", "status", vhci_driver->hc_device->name);
+		dbg("sysfs_get_device_attr(\"status\") failed: %s",
+		    vhci_driver->hc_device->name);
 		return -1;
 	}
 
-	dbg("name %s, path %s, len %d, method %d\n", attr_status->name,
-			attr_status->path, attr_status->len, attr_status->method);
-
-	dbg("%s", attr_status->value);
+	dbg("name: %s  path: %s  len: %d  method: %d  value: %s",
+	    attr_status->name, attr_status->path, attr_status->len,
+	    attr_status->method, attr_status->value);
 
-	{
-		char *c;
-
-		/* skip a header line */
-		c = strchr(attr_status->value, '\n') + 1;
+	/* skip a header line */
+	c = strchr(attr_status->value, '\n') + 1;
 
-		while (*c != '\0') {
-			/* go to the next line */
-			c = strchr(c, '\n') + 1;
-			nports += 1;
-		}
+	while (*c != '\0') {
+		/* go to the next line */
+		c = strchr(c, '\n') + 1;
+		nports += 1;
 	}
 
 	return nports;
@@ -275,20 +285,21 @@ static int get_hc_busid(char *sysfs_mntpath, char *hc_busid)
 
 	int found = 0;
 
-        snprintf(sdriver_path, SYSFS_PATH_MAX, "%s/%s/platform/%s/%s",
-                                sysfs_mntpath, SYSFS_BUS_NAME, SYSFS_DRIVERS_NAME,
-                                vhci_driver_name);
+        snprintf(sdriver_path, SYSFS_PATH_MAX, "%s/%s/%s/%s/%s", sysfs_mntpath,
+		 SYSFS_BUS_NAME, USBIP_VHCI_BUS_TYPE, SYSFS_DRIVERS_NAME,
+		 USBIP_VHCI_DRV_NAME);
 
         sdriver = sysfs_open_driver_path(sdriver_path);
         if (!sdriver) {
-		info("%s is not found", sdriver_path);
-                info("load usbip-core.ko and vhci-hcd.ko !");
+		dbg("sysfs_open_driver_path failed: %s", sdriver_path);
+                dbg("make sure " USBIP_CORE_MOD_NAME ".ko and "
+		    USBIP_VHCI_DRV_NAME ".ko are loaded!");
                 return -1;
         }
 
 	hc_devs = sysfs_get_driver_devices(sdriver);
 	if (!hc_devs) {
-		err("get hc list");
+		dbg("sysfs_get_driver failed");
 		goto err;
 	}
 
@@ -304,7 +315,7 @@ err:
 	if (found)
 		return 0;
 
-	err("not found usbip hc");
+	dbg("%s not found", hc_busid);
 	return -1;
 }
 
@@ -318,13 +329,13 @@ int usbip_vhci_driver_open(void)
 
 	vhci_driver = (struct usbip_vhci_driver *) calloc(1, sizeof(*vhci_driver));
 	if (!vhci_driver) {
-		err("alloc vhci_driver");
+		dbg("calloc failed");
 		return -1;
 	}
 
 	ret = sysfs_get_mnt_path(vhci_driver->sysfs_mntpath, SYSFS_PATH_MAX);
 	if (ret < 0) {
-		err("sysfs must be mounted");
+		dbg("sysfs_get_mnt_path failed");
 		goto err;
 	}
 
@@ -333,17 +344,18 @@ int usbip_vhci_driver_open(void)
 		goto err;
 
 	/* will be freed in usbip_driver_close() */
-	vhci_driver->hc_device = sysfs_open_device("platform", hc_busid);
+	vhci_driver->hc_device = sysfs_open_device(USBIP_VHCI_BUS_TYPE,
+						   hc_busid);
 	if (!vhci_driver->hc_device) {
-		err("get sysfs vhci_driver");
+		dbg("sysfs_open_device failed");
 		goto err;
 	}
 
 	vhci_driver->nports = get_nports();
 
-	info("%d ports available\n", vhci_driver->nports);
+	dbg("available ports: %d", vhci_driver->nports);
 
-	vhci_driver->cdev_list = dlist_new(sizeof(struct class_device));
+	vhci_driver->cdev_list = dlist_new(sizeof(struct usbip_class_device));
 	if (!vhci_driver->cdev_list)
 		goto err;
 
@@ -402,7 +414,7 @@ int usbip_vhci_refresh_device_list(void)
 			dlist_destroy(vhci_driver->idev[i].cdev_list);
 	}
 
-	vhci_driver->cdev_list = dlist_new(sizeof(struct class_device));
+	vhci_driver->cdev_list = dlist_new(sizeof(struct usbip_class_device));
 	if (!vhci_driver->cdev_list)
 		goto err;
 
@@ -422,7 +434,7 @@ err:
 			dlist_destroy(vhci_driver->idev[i].cdev_list);
 	}
 
-	err("refresh device list");
+	dbg("failed to refresh device list");
 	return -1;
 }
 
@@ -445,7 +457,8 @@ int usbip_vhci_attach_device2(uint8_t port, int sockfd, uint32_t devid,
 
 	attr_attach = sysfs_get_device_attr(vhci_driver->hc_device, "attach");
 	if (!attr_attach) {
-		err("get attach");
+		dbg("sysfs_get_device_attr(\"attach\") failed: %s",
+		    vhci_driver->hc_device->name);
 		return -1;
 	}
 
@@ -455,11 +468,11 @@ int usbip_vhci_attach_device2(uint8_t port, int sockfd, uint32_t devid,
 
 	ret = sysfs_write_attribute(attr_attach, buff, strlen(buff));
 	if (ret < 0) {
-		err("write to attach failed");
+		dbg("sysfs_write_attribute failed");
 		return -1;
 	}
 
-	info("port %d attached", port);
+	dbg("attached port: %d", port);
 
 	return 0;
 }
@@ -486,21 +499,21 @@ int usbip_vhci_detach_device(uint8_t port)
 
 	attr_detach = sysfs_get_device_attr(vhci_driver->hc_device, "detach");
 	if (!attr_detach) {
-		err("get detach");
+		dbg("sysfs_get_device_attr(\"detach\") failed: %s",
+		    vhci_driver->hc_device->name);
 		return -1;
 	}
 
 	snprintf(buff, sizeof(buff), "%u", port);
-	dbg("writing to detach");
 	dbg("writing: %s", buff);
 
 	ret = sysfs_write_attribute(attr_detach, buff, strlen(buff));
 	if (ret < 0) {
-		err("write to detach failed");
+		dbg("sysfs_write_attribute failed");
 		return -1;
 	}
 
-	info("port %d detached", port);
+	dbg("detached port: %d", port);
 
 	return 0;
 }
diff --git a/drivers/staging/usbip/userspace/libsrc/vhci_driver.h b/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
index cad8ad7586d9..89949aa7c313 100644
--- a/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
+++ b/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
@@ -2,18 +2,20 @@
  * Copyright (C) 2005-2007 Takahiro Hirofuchi
  */
 
-#ifndef _VHCI_DRIVER_H
-#define _VHCI_DRIVER_H
-
-#include "usbip.h"
+#ifndef __VHCI_DRIVER_H
+#define __VHCI_DRIVER_H
 
+#include <sysfs/libsysfs.h>
+#include <stdint.h>
 
+#include "usbip_common.h"
 
+#define USBIP_VHCI_BUS_TYPE "platform"
 #define MAXNPORT 128
 
-struct class_device {
-	char clspath[SYSFS_PATH_MAX];
-	char devpath[SYSFS_PATH_MAX];
+struct usbip_class_device {
+	char class_path[SYSFS_PATH_MAX];
+	char dev_path[SYSFS_PATH_MAX];
 };
 
 struct usbip_imported_device {
@@ -25,16 +27,19 @@ struct usbip_imported_device {
 	uint8_t busnum;
 	uint8_t devnum;
 
-
-	struct dlist *cdev_list;	/* list of class device */
-	struct usb_device udev;
+	/* usbip_class_device list */
+	struct dlist *cdev_list;
+	struct usbip_usb_device udev;
 };
 
 struct usbip_vhci_driver {
 	char sysfs_mntpath[SYSFS_PATH_MAX];
-	struct sysfs_device *hc_device; /* /sys/devices/platform/vhci_hcd */
 
-	struct dlist *cdev_list;	/* list of class device */
+	/* /sys/devices/platform/vhci_hcd */
+	struct sysfs_device *hc_device;
+
+	/* usbip_class_device list */
+	struct dlist *cdev_list;
 
 	int nports;
 	struct usbip_imported_device idev[MAXNPORT];
@@ -58,4 +63,5 @@ int usbip_vhci_attach_device(uint8_t port, int sockfd, uint8_t busnum,
 		uint8_t devnum, uint32_t speed);
 
 int usbip_vhci_detach_device(uint8_t port);
-#endif
+
+#endif /* __VHCI_DRIVER_H */