usbip: move usbip userspace code out of staging

At this point, USB/IP userspace code is fully functional
and can be moved out of staging.

Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

14 files changed, 2542 insertions, 0 deletions

diff --git a/tools/usb/usbip/src/Makefile.am b/tools/usb/usbip/src/Makefile.am
new file mode 100644
index 000000000000..e81a4ebadeff
--- /dev/null
+++ b/tools/usb/usbip/src/Makefile.am
@@ -0,0 +1,11 @@
+AM_CPPFLAGS = -I$(top_srcdir)/libsrc -DUSBIDS_FILE='"@USBIDS_DIR@/usb.ids"'
+AM_CFLAGS   = @EXTRA_CFLAGS@
+LDADD       = $(top_builddir)/libsrc/libusbip.la
+
+sbin_PROGRAMS := usbip usbipd
+
+usbip_SOURCES := usbip.h utils.h usbip.c utils.c usbip_network.c \
+		 usbip_attach.c usbip_detach.c usbip_list.c \
+		 usbip_bind.c usbip_unbind.c usbip_port.c
+
+usbipd_SOURCES := usbip_network.h usbipd.c usbip_network.c
diff --git a/tools/usb/usbip/src/usbip.c b/tools/usb/usbip/src/usbip.c
new file mode 100644
index 000000000000..d7599d943529
--- /dev/null
+++ b/tools/usb/usbip/src/usbip.c
@@ -0,0 +1,201 @@
+/*
+ * command structure borrowed from udev
+ * (git://git.kernel.org/pub/scm/linux/hotplug/udev.git)
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+
+#include <getopt.h>
+#include <syslog.h>
+
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "usbip.h"
+
+static int usbip_help(int argc, char *argv[]);
+static int usbip_version(int argc, char *argv[]);
+
+static const char usbip_version_string[] = PACKAGE_STRING;
+
+static const char usbip_usage_string[] =
+	"usbip [--debug] [--log] [--tcp-port PORT] [version]\n"
+	"             [help] <command> <args>\n";
+
+static void usbip_usage(void)
+{
+	printf("usage: %s", usbip_usage_string);
+}
+
+struct command {
+	const char *name;
+	int (*fn)(int argc, char *argv[]);
+	const char *help;
+	void (*usage)(void);
+};
+
+static const struct command cmds[] = {
+	{
+		.name  = "help",
+		.fn    = usbip_help,
+		.help  = NULL,
+		.usage = NULL
+	},
+	{
+		.name  = "version",
+		.fn    = usbip_version,
+		.help  = NULL,
+		.usage = NULL
+	},
+	{
+		.name  = "attach",
+		.fn    = usbip_attach,
+		.help  = "Attach a remote USB device",
+		.usage = usbip_attach_usage
+	},
+	{
+		.name  = "detach",
+		.fn    = usbip_detach,
+		.help  = "Detach a remote USB device",
+		.usage = usbip_detach_usage
+	},
+	{
+		.name  = "list",
+		.fn    = usbip_list,
+		.help  = "List exportable or local USB devices",
+		.usage = usbip_list_usage
+	},
+	{
+		.name  = "bind",
+		.fn    = usbip_bind,
+		.help  = "Bind device to " USBIP_HOST_DRV_NAME ".ko",
+		.usage = usbip_bind_usage
+	},
+	{
+		.name  = "unbind",
+		.fn    = usbip_unbind,
+		.help  = "Unbind device from " USBIP_HOST_DRV_NAME ".ko",
+		.usage = usbip_unbind_usage
+	},
+	{
+		.name  = "port",
+		.fn    = usbip_port_show,
+		.help  = "Show imported USB devices",
+		.usage = NULL
+	},
+	{ NULL, NULL, NULL, NULL }
+};
+
+static int usbip_help(int argc, char *argv[])
+{
+	const struct command *cmd;
+	int i;
+	int ret = 0;
+
+	if (argc > 1 && argv++) {
+		for (i = 0; cmds[i].name != NULL; i++)
+			if (!strcmp(cmds[i].name, argv[0]) && cmds[i].usage) {
+				cmds[i].usage();
+				goto done;
+			}
+		ret = -1;
+	}
+
+	usbip_usage();
+	printf("\n");
+	for (cmd = cmds; cmd->name != NULL; cmd++)
+		if (cmd->help != NULL)
+			printf("  %-10s %s\n", cmd->name, cmd->help);
+	printf("\n");
+done:
+	return ret;
+}
+
+static int usbip_version(int argc, char *argv[])
+{
+	(void) argc;
+	(void) argv;
+
+	printf(PROGNAME " (%s)\n", usbip_version_string);
+	return 0;
+}
+
+static int run_command(const struct command *cmd, int argc, char *argv[])
+{
+	dbg("running command: `%s'", cmd->name);
+	return cmd->fn(argc, argv);
+}
+
+int main(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "debug",    no_argument,       NULL, 'd' },
+		{ "log",      no_argument,       NULL, 'l' },
+		{ "tcp-port", required_argument, NULL, 't' },
+		{ NULL,       0,                 NULL,  0  }
+	};
+
+	char *cmd;
+	int opt;
+	int i, rc = -1;
+
+	usbip_use_stderr = 1;
+	opterr = 0;
+	for (;;) {
+		opt = getopt_long(argc, argv, "+dlt:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'd':
+			usbip_use_debug = 1;
+			break;
+		case 'l':
+			usbip_use_syslog = 1;
+			openlog("", LOG_PID, LOG_USER);
+			break;
+		case 't':
+			usbip_setup_port_number(optarg);
+			break;
+		case '?':
+			printf("usbip: invalid option\n");
+		default:
+			usbip_usage();
+			goto out;
+		}
+	}
+
+	cmd = argv[optind];
+	if (cmd) {
+		for (i = 0; cmds[i].name != NULL; i++)
+			if (!strcmp(cmds[i].name, cmd)) {
+				argc -= optind;
+				argv += optind;
+				optind = 0;
+				rc = run_command(&cmds[i], argc, argv);
+				goto out;
+			}
+	}
+
+	/* invalid command */
+	usbip_help(0, NULL);
+out:
+	return (rc > -1 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
diff --git a/tools/usb/usbip/src/usbip.h b/tools/usb/usbip/src/usbip.h
new file mode 100644
index 000000000000..84fe66a9d8ad
--- /dev/null
+++ b/tools/usb/usbip/src/usbip.h
@@ -0,0 +1,40 @@
+/*
+ * 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_H
+#define __USBIP_H
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+/* usbip commands */
+int usbip_attach(int argc, char *argv[]);
+int usbip_detach(int argc, char *argv[]);
+int usbip_list(int argc, char *argv[]);
+int usbip_bind(int argc, char *argv[]);
+int usbip_unbind(int argc, char *argv[]);
+int usbip_port_show(int argc, char *argv[]);
+
+void usbip_attach_usage(void);
+void usbip_detach_usage(void);
+void usbip_list_usage(void);
+void usbip_bind_usage(void);
+void usbip_unbind_usage(void);
+
+#endif /* __USBIP_H */
diff --git a/tools/usb/usbip/src/usbip_attach.c b/tools/usb/usbip/src/usbip_attach.c
new file mode 100644
index 000000000000..d58a14dfc094
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_attach.c
@@ -0,0 +1,241 @@
+/*
+ * 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/stat.h>
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "vhci_driver.h"
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "usbip.h"
+
+static const char usbip_attach_usage_string[] =
+	"usbip attach <args>\n"
+	"    -r, --remote=<host>      The machine with exported USB devices\n"
+	"    -b, --busid=<busid>    Busid of the device on <host>\n";
+
+void usbip_attach_usage(void)
+{
+	printf("usage: %s", usbip_attach_usage_string);
+}
+
+#define MAX_BUFF 100
+static int record_connection(char *host, char *port, char *busid, int rhport)
+{
+	int fd;
+	char path[PATH_MAX+1];
+	char buff[MAX_BUFF+1];
+	int ret;
+
+	ret = mkdir(VHCI_STATE_PATH, 0700);
+	if (ret < 0) {
+		/* if VHCI_STATE_PATH exists, then it better be a directory */
+		if (errno == EEXIST) {
+			struct stat s;
+
+			ret = stat(VHCI_STATE_PATH, &s);
+			if (ret < 0)
+				return -1;
+			if (!(s.st_mode & S_IFDIR))
+				return -1;
+		} else
+			return -1;
+	}
+
+	snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", rhport);
+
+	fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU);
+	if (fd < 0)
+		return -1;
+
+	snprintf(buff, MAX_BUFF, "%s %s %s\n",
+			host, port, busid);
+
+	ret = write(fd, buff, strlen(buff));
+	if (ret != (ssize_t) strlen(buff)) {
+		close(fd);
+		return -1;
+	}
+
+	close(fd);
+
+	return 0;
+}
+
+static int import_device(int sockfd, struct usbip_usb_device *udev)
+{
+	int rc;
+	int port;
+
+	rc = usbip_vhci_driver_open();
+	if (rc < 0) {
+		err("open vhci_driver");
+		return -1;
+	}
+
+	port = usbip_vhci_get_free_port();
+	if (port < 0) {
+		err("no free port");
+		usbip_vhci_driver_close();
+		return -1;
+	}
+
+	rc = usbip_vhci_attach_device(port, sockfd, udev->busnum,
+				      udev->devnum, udev->speed);
+	if (rc < 0) {
+		err("import device");
+		usbip_vhci_driver_close();
+		return -1;
+	}
+
+	usbip_vhci_driver_close();
+
+	return port;
+}
+
+static int query_import_device(int sockfd, char *busid)
+{
+	int rc;
+	struct op_import_request request;
+	struct op_import_reply   reply;
+	uint16_t code = OP_REP_IMPORT;
+
+	memset(&request, 0, sizeof(request));
+	memset(&reply, 0, sizeof(reply));
+
+	/* send a request */
+	rc = usbip_net_send_op_common(sockfd, OP_REQ_IMPORT, 0);
+	if (rc < 0) {
+		err("send op_common");
+		return -1;
+	}
+
+	strncpy(request.busid, busid, SYSFS_BUS_ID_SIZE-1);
+
+	PACK_OP_IMPORT_REQUEST(0, &request);
+
+	rc = usbip_net_send(sockfd, (void *) &request, sizeof(request));
+	if (rc < 0) {
+		err("send op_import_request");
+		return -1;
+	}
+
+	/* receive a reply */
+	rc = usbip_net_recv_op_common(sockfd, &code);
+	if (rc < 0) {
+		err("recv op_common");
+		return -1;
+	}
+
+	rc = usbip_net_recv(sockfd, (void *) &reply, sizeof(reply));
+	if (rc < 0) {
+		err("recv op_import_reply");
+		return -1;
+	}
+
+	PACK_OP_IMPORT_REPLY(0, &reply);
+
+	/* check the reply */
+	if (strncmp(reply.udev.busid, busid, SYSFS_BUS_ID_SIZE)) {
+		err("recv different busid %s", reply.udev.busid);
+		return -1;
+	}
+
+	/* import a device */
+	return import_device(sockfd, &reply.udev);
+}
+
+static int attach_device(char *host, char *busid)
+{
+	int sockfd;
+	int rc;
+	int rhport;
+
+	sockfd = usbip_net_tcp_connect(host, usbip_port_string);
+	if (sockfd < 0) {
+		err("tcp connect");
+		return -1;
+	}
+
+	rhport = query_import_device(sockfd, busid);
+	if (rhport < 0) {
+		err("query");
+		return -1;
+	}
+
+	close(sockfd);
+
+	rc = record_connection(host, usbip_port_string, busid, rhport);
+	if (rc < 0) {
+		err("record connection");
+		return -1;
+	}
+
+	return 0;
+}
+
+int usbip_attach(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "remote", required_argument, NULL, 'r' },
+		{ "busid",  required_argument, NULL, 'b' },
+		{ NULL, 0,  NULL, 0 }
+	};
+	char *host = NULL;
+	char *busid = NULL;
+	int opt;
+	int ret = -1;
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "r:b:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'r':
+			host = optarg;
+			break;
+		case 'b':
+			busid = optarg;
+			break;
+		default:
+			goto err_out;
+		}
+	}
+
+	if (!host || !busid)
+		goto err_out;
+
+	ret = attach_device(host, busid);
+	goto out;
+
+err_out:
+	usbip_attach_usage();
+out:
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbip_bind.c b/tools/usb/usbip/src/usbip_bind.c
new file mode 100644
index 000000000000..fa46141ae68b
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_bind.c
@@ -0,0 +1,214 @@
+/*
+ * 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 <libudev.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <getopt.h>
+
+#include "usbip_common.h"
+#include "utils.h"
+#include "usbip.h"
+#include "sysfs_utils.h"
+
+enum unbind_status {
+	UNBIND_ST_OK,
+	UNBIND_ST_USBIP_HOST,
+	UNBIND_ST_FAILED
+};
+
+static const char usbip_bind_usage_string[] =
+	"usbip bind <args>\n"
+	"    -b, --busid=<busid>    Bind " USBIP_HOST_DRV_NAME ".ko to device "
+	"on <busid>\n";
+
+void usbip_bind_usage(void)
+{
+	printf("usage: %s", usbip_bind_usage_string);
+}
+
+/* call at unbound state */
+static int bind_usbip(char *busid)
+{
+	char attr_name[] = "bind";
+	char bind_attr_path[SYSFS_PATH_MAX];
+	int rc = -1;
+
+	snprintf(bind_attr_path, sizeof(bind_attr_path), "%s/%s/%s/%s/%s/%s",
+		 SYSFS_MNT_PATH, SYSFS_BUS_NAME, SYSFS_BUS_TYPE,
+		 SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME, attr_name);
+
+	rc = write_sysfs_attribute(bind_attr_path, busid, strlen(busid));
+	if (rc < 0) {
+		err("error binding device %s to driver: %s", busid,
+		    strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+/* buggy driver may cause dead lock */
+static int unbind_other(char *busid)
+{
+	enum unbind_status status = UNBIND_ST_OK;
+
+	char attr_name[] = "unbind";
+	char unbind_attr_path[SYSFS_PATH_MAX];
+	int rc = -1;
+
+	struct udev *udev;
+	struct udev_device *dev;
+	const char *driver;
+	const char *bDevClass;
+
+	/* Create libudev context. */
+	udev = udev_new();
+
+	/* Get the device. */
+	dev = udev_device_new_from_subsystem_sysname(udev, "usb", busid);
+	if (!dev) {
+		dbg("unable to find device with bus ID %s", busid);
+		goto err_close_busid_dev;
+	}
+
+	/* Check what kind of device it is. */
+	bDevClass  = udev_device_get_sysattr_value(dev, "bDeviceClass");
+	if (!bDevClass) {
+		dbg("unable to get bDevClass device attribute");
+		goto err_close_busid_dev;
+	}
+
+	if (!strncmp(bDevClass, "09", strlen(bDevClass))) {
+		dbg("skip unbinding of hub");
+		goto err_close_busid_dev;
+	}
+
+	/* Get the device driver. */
+	driver = udev_device_get_driver(dev);
+	if (!driver) {
+		/* No driver bound to this device. */
+		goto out;
+	}
+
+	if (!strncmp(USBIP_HOST_DRV_NAME, driver,
+				strlen(USBIP_HOST_DRV_NAME))) {
+		/* Already bound to usbip-host. */
+		status = UNBIND_ST_USBIP_HOST;
+		goto out;
+	}
+
+	/* Unbind device from driver. */
+	snprintf(unbind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
+		 SYSFS_MNT_PATH, SYSFS_BUS_NAME, SYSFS_BUS_TYPE,
+		 SYSFS_DRIVERS_NAME, driver, attr_name);
+
+	rc = write_sysfs_attribute(unbind_attr_path, busid, strlen(busid));
+	if (rc < 0) {
+		err("error unbinding device %s from driver", busid);
+		goto err_close_busid_dev;
+	}
+
+	goto out;
+
+err_close_busid_dev:
+	status = UNBIND_ST_FAILED;
+out:
+	udev_device_unref(dev);
+	udev_unref(udev);
+
+	return status;
+}
+
+static int bind_device(char *busid)
+{
+	int rc;
+	struct udev *udev;
+	struct udev_device *dev;
+
+	/* Check whether the device with this bus ID exists. */
+	udev = udev_new();
+	dev = udev_device_new_from_subsystem_sysname(udev, "usb", busid);
+	if (!dev) {
+		err("device with the specified bus ID does not exist");
+		return -1;
+	}
+	udev_unref(udev);
+
+	rc = unbind_other(busid);
+	if (rc == UNBIND_ST_FAILED) {
+		err("could not unbind driver from device on busid %s", busid);
+		return -1;
+	} else if (rc == UNBIND_ST_USBIP_HOST) {
+		err("device on busid %s is already bound to %s", busid,
+		    USBIP_HOST_DRV_NAME);
+		return -1;
+	}
+
+	rc = modify_match_busid(busid, 1);
+	if (rc < 0) {
+		err("unable to bind device on %s", busid);
+		return -1;
+	}
+
+	rc = bind_usbip(busid);
+	if (rc < 0) {
+		err("could not bind device to %s", USBIP_HOST_DRV_NAME);
+		modify_match_busid(busid, 0);
+		return -1;
+	}
+
+	info("bind device on busid %s: complete", busid);
+
+	return 0;
+}
+
+int usbip_bind(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "busid", required_argument, NULL, 'b' },
+		{ NULL,    0,                 NULL,  0  }
+	};
+
+	int opt;
+	int ret = -1;
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "b:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'b':
+			ret = bind_device(optarg);
+			goto out;
+		default:
+			goto err_out;
+		}
+	}
+
+err_out:
+	usbip_bind_usage();
+out:
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbip_detach.c b/tools/usb/usbip/src/usbip_detach.c
new file mode 100644
index 000000000000..05c6d15856eb
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_detach.c
@@ -0,0 +1,110 @@
+/*
+ * 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 <ctype.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <getopt.h>
+#include <unistd.h>
+
+#include "vhci_driver.h"
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "usbip.h"
+
+static const char usbip_detach_usage_string[] =
+	"usbip detach <args>\n"
+	"    -p, --port=<port>    " USBIP_VHCI_DRV_NAME
+	" port the device is on\n";
+
+void usbip_detach_usage(void)
+{
+	printf("usage: %s", usbip_detach_usage_string);
+}
+
+static int detach_port(char *port)
+{
+	int ret;
+	uint8_t portnum;
+	char path[PATH_MAX+1];
+
+	for (unsigned int i = 0; i < strlen(port); i++)
+		if (!isdigit(port[i])) {
+			err("invalid port %s", port);
+			return -1;
+		}
+
+	/* check max port */
+
+	portnum = atoi(port);
+
+	/* remove the port state file */
+
+	snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum);
+
+	remove(path);
+	rmdir(VHCI_STATE_PATH);
+
+	ret = usbip_vhci_driver_open();
+	if (ret < 0) {
+		err("open vhci_driver");
+		return -1;
+	}
+
+	ret = usbip_vhci_detach_device(portnum);
+	if (ret < 0)
+		return -1;
+
+	usbip_vhci_driver_close();
+
+	return ret;
+}
+
+int usbip_detach(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "port", required_argument, NULL, 'p' },
+		{ NULL, 0, NULL, 0 }
+	};
+	int opt;
+	int ret = -1;
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "p:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'p':
+			ret = detach_port(optarg);
+			goto out;
+		default:
+			goto err_out;
+		}
+	}
+
+err_out:
+	usbip_detach_usage();
+out:
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbip_list.c b/tools/usb/usbip/src/usbip_list.c
new file mode 100644
index 000000000000..d5ce34a410e7
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_list.c
@@ -0,0 +1,283 @@
+/*
+ * 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 <libudev.h>
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <getopt.h>
+#include <netdb.h>
+#include <unistd.h>
+
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "usbip.h"
+
+static const char usbip_list_usage_string[] =
+	"usbip list [-p|--parsable] <args>\n"
+	"    -p, --parsable         Parsable list format\n"
+	"    -r, --remote=<host>    List the exportable USB devices on <host>\n"
+	"    -l, --local            List the local USB devices\n";
+
+void usbip_list_usage(void)
+{
+	printf("usage: %s", usbip_list_usage_string);
+}
+
+static int get_exported_devices(char *host, int sockfd)
+{
+	char product_name[100];
+	char class_name[100];
+	struct op_devlist_reply reply;
+	uint16_t code = OP_REP_DEVLIST;
+	struct usbip_usb_device udev;
+	struct usbip_usb_interface uintf;
+	unsigned int i;
+	int rc, j;
+
+	rc = usbip_net_send_op_common(sockfd, OP_REQ_DEVLIST, 0);
+	if (rc < 0) {
+		dbg("usbip_net_send_op_common failed");
+		return -1;
+	}
+
+	rc = usbip_net_recv_op_common(sockfd, &code);
+	if (rc < 0) {
+		dbg("usbip_net_recv_op_common failed");
+		return -1;
+	}
+
+	memset(&reply, 0, sizeof(reply));
+	rc = usbip_net_recv(sockfd, &reply, sizeof(reply));
+	if (rc < 0) {
+		dbg("usbip_net_recv_op_devlist failed");
+		return -1;
+	}
+	PACK_OP_DEVLIST_REPLY(0, &reply);
+	dbg("exportable devices: %d\n", reply.ndev);
+
+	if (reply.ndev == 0) {
+		info("no exportable devices found on %s", host);
+		return 0;
+	}
+
+	printf("Exportable USB devices\n");
+	printf("======================\n");
+	printf(" - %s\n", host);
+
+	for (i = 0; i < reply.ndev; i++) {
+		memset(&udev, 0, sizeof(udev));
+		rc = usbip_net_recv(sockfd, &udev, sizeof(udev));
+		if (rc < 0) {
+			dbg("usbip_net_recv failed: usbip_usb_device[%d]", i);
+			return -1;
+		}
+		usbip_net_pack_usb_device(0, &udev);
+
+		usbip_names_get_product(product_name, sizeof(product_name),
+					udev.idVendor, udev.idProduct);
+		usbip_names_get_class(class_name, sizeof(class_name),
+				      udev.bDeviceClass, udev.bDeviceSubClass,
+				      udev.bDeviceProtocol);
+		printf("%11s: %s\n", udev.busid, product_name);
+		printf("%11s: %s\n", "", udev.path);
+		printf("%11s: %s\n", "", class_name);
+
+		for (j = 0; j < udev.bNumInterfaces; j++) {
+			rc = usbip_net_recv(sockfd, &uintf, sizeof(uintf));
+			if (rc < 0) {
+				err("usbip_net_recv failed: usbip_usb_intf[%d]",
+						j);
+
+				return -1;
+			}
+			usbip_net_pack_usb_interface(0, &uintf);
+
+			usbip_names_get_class(class_name, sizeof(class_name),
+					uintf.bInterfaceClass,
+					uintf.bInterfaceSubClass,
+					uintf.bInterfaceProtocol);
+			printf("%11s: %2d - %s\n", "", j, class_name);
+		}
+
+		printf("\n");
+	}
+
+	return 0;
+}
+
+static int list_exported_devices(char *host)
+{
+	int rc;
+	int sockfd;
+
+	sockfd = usbip_net_tcp_connect(host, usbip_port_string);
+	if (sockfd < 0) {
+		err("could not connect to %s:%s: %s", host,
+		    usbip_port_string, gai_strerror(sockfd));
+		return -1;
+	}
+	dbg("connected to %s:%s", host, usbip_port_string);
+
+	rc = get_exported_devices(host, sockfd);
+	if (rc < 0) {
+		err("failed to get device list from %s", host);
+		return -1;
+	}
+
+	close(sockfd);
+
+	return 0;
+}
+
+static void print_device(const char *busid, const char *vendor,
+			 const char *product, bool parsable)
+{
+	if (parsable)
+		printf("busid=%s#usbid=%.4s:%.4s#", busid, vendor, product);
+	else
+		printf(" - busid %s (%.4s:%.4s)\n", busid, vendor, product);
+}
+
+static void print_product_name(char *product_name, bool parsable)
+{
+	if (!parsable)
+		printf("   %s\n", product_name);
+}
+
+static int list_devices(bool parsable)
+{
+	struct udev *udev;
+	struct udev_enumerate *enumerate;
+	struct udev_list_entry *devices, *dev_list_entry;
+	struct udev_device *dev;
+	const char *path;
+	const char *idVendor;
+	const char *idProduct;
+	const char *bConfValue;
+	const char *bNumIntfs;
+	const char *busid;
+	char product_name[128];
+	int ret = -1;
+
+	/* Create libudev context. */
+	udev = udev_new();
+
+	/* Create libudev device enumeration. */
+	enumerate = udev_enumerate_new(udev);
+
+	/* Take only USB devices that are not hubs and do not have
+	 * the bInterfaceNumber attribute, i.e. are not interfaces.
+	 */
+	udev_enumerate_add_match_subsystem(enumerate, "usb");
+	udev_enumerate_add_nomatch_sysattr(enumerate, "bDeviceClass", "09");
+	udev_enumerate_add_nomatch_sysattr(enumerate, "bInterfaceNumber", NULL);
+	udev_enumerate_scan_devices(enumerate);
+
+	devices = udev_enumerate_get_list_entry(enumerate);
+
+	/* Show information about each device. */
+	udev_list_entry_foreach(dev_list_entry, devices) {
+		path = udev_list_entry_get_name(dev_list_entry);
+		dev = udev_device_new_from_syspath(udev, path);
+
+		/* Get device information. */
+		idVendor = udev_device_get_sysattr_value(dev, "idVendor");
+		idProduct = udev_device_get_sysattr_value(dev, "idProduct");
+		bConfValue = udev_device_get_sysattr_value(dev, "bConfigurationValue");
+		bNumIntfs = udev_device_get_sysattr_value(dev, "bNumInterfaces");
+		busid = udev_device_get_sysname(dev);
+		if (!idVendor || !idProduct || !bConfValue || !bNumIntfs) {
+			err("problem getting device attributes: %s",
+			    strerror(errno));
+			goto err_out;
+		}
+
+		/* Get product name. */
+		usbip_names_get_product(product_name, sizeof(product_name),
+					strtol(idVendor, NULL, 16),
+					strtol(idProduct, NULL, 16));
+
+		/* Print information. */
+		print_device(busid, idVendor, idProduct, parsable);
+		print_product_name(product_name, parsable);
+
+		printf("\n");
+
+		udev_device_unref(dev);
+	}
+
+	ret = 0;
+
+err_out:
+	udev_enumerate_unref(enumerate);
+	udev_unref(udev);
+
+	return ret;
+}
+
+int usbip_list(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "parsable", no_argument,       NULL, 'p' },
+		{ "remote",   required_argument, NULL, 'r' },
+		{ "local",    no_argument,       NULL, 'l' },
+		{ NULL,       0,                 NULL,  0  }
+	};
+
+	bool parsable = false;
+	int opt;
+	int ret = -1;
+
+	if (usbip_names_init(USBIDS_FILE))
+		err("failed to open %s", USBIDS_FILE);
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "pr:l", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'p':
+			parsable = true;
+			break;
+		case 'r':
+			ret = list_exported_devices(optarg);
+			goto out;
+		case 'l':
+			ret = list_devices(parsable);
+			goto out;
+		default:
+			goto err_out;
+		}
+	}
+
+err_out:
+	usbip_list_usage();
+out:
+	usbip_names_free();
+
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbip_network.c b/tools/usb/usbip/src/usbip_network.c
new file mode 100644
index 000000000000..b4c37e76a6e0
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_network.c
@@ -0,0 +1,303 @@
+/*
+ * 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/socket.h>
+
+#include <string.h>
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/tcp.h>
+#include <unistd.h>
+
+#ifdef HAVE_LIBWRAP
+#include <tcpd.h>
+#endif
+
+#include "usbip_common.h"
+#include "usbip_network.h"
+
+int usbip_port = 3240;
+char *usbip_port_string = "3240";
+
+void usbip_setup_port_number(char *arg)
+{
+	dbg("parsing port arg '%s'", arg);
+	char *end;
+	unsigned long int port = strtoul(arg, &end, 10);
+
+	if (end == arg) {
+		err("port: could not parse '%s' as a decimal integer", arg);
+		return;
+	}
+
+	if (*end != '\0') {
+		err("port: garbage at end of '%s'", arg);
+		return;
+	}
+
+	if (port > UINT16_MAX) {
+		err("port: %s too high (max=%d)",
+		    arg, UINT16_MAX);
+		return;
+	}
+
+	usbip_port = port;
+	usbip_port_string = arg;
+	info("using port %d (\"%s\")", usbip_port, usbip_port_string);
+}
+
+void usbip_net_pack_uint32_t(int pack, uint32_t *num)
+{
+	uint32_t i;
+
+	if (pack)
+		i = htonl(*num);
+	else
+		i = ntohl(*num);
+
+	*num = i;
+}
+
+void usbip_net_pack_uint16_t(int pack, uint16_t *num)
+{
+	uint16_t i;
+
+	if (pack)
+		i = htons(*num);
+	else
+		i = ntohs(*num);
+
+	*num = i;
+}
+
+void usbip_net_pack_usb_device(int pack, struct usbip_usb_device *udev)
+{
+	usbip_net_pack_uint32_t(pack, &udev->busnum);
+	usbip_net_pack_uint32_t(pack, &udev->devnum);
+	usbip_net_pack_uint32_t(pack, &udev->speed);
+
+	usbip_net_pack_uint16_t(pack, &udev->idVendor);
+	usbip_net_pack_uint16_t(pack, &udev->idProduct);
+	usbip_net_pack_uint16_t(pack, &udev->bcdDevice);
+}
+
+void usbip_net_pack_usb_interface(int pack __attribute__((unused)),
+				  struct usbip_usb_interface *udev
+				  __attribute__((unused)))
+{
+	/* uint8_t members need nothing */
+}
+
+static ssize_t usbip_net_xmit(int sockfd, void *buff, size_t bufflen,
+			      int sending)
+{
+	ssize_t nbytes;
+	ssize_t total = 0;
+
+	if (!bufflen)
+		return 0;
+
+	do {
+		if (sending)
+			nbytes = send(sockfd, buff, bufflen, 0);
+		else
+			nbytes = recv(sockfd, buff, bufflen, MSG_WAITALL);
+
+		if (nbytes <= 0)
+			return -1;
+
+		buff	 = (void *)((intptr_t) buff + nbytes);
+		bufflen	-= nbytes;
+		total	+= nbytes;
+
+	} while (bufflen > 0);
+
+	return total;
+}
+
+ssize_t usbip_net_recv(int sockfd, void *buff, size_t bufflen)
+{
+	return usbip_net_xmit(sockfd, buff, bufflen, 0);
+}
+
+ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen)
+{
+	return usbip_net_xmit(sockfd, buff, bufflen, 1);
+}
+
+int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status)
+{
+	struct op_common op_common;
+	int rc;
+
+	memset(&op_common, 0, sizeof(op_common));
+
+	op_common.version = USBIP_VERSION;
+	op_common.code    = code;
+	op_common.status  = status;
+
+	PACK_OP_COMMON(1, &op_common);
+
+	rc = usbip_net_send(sockfd, &op_common, sizeof(op_common));
+	if (rc < 0) {
+		dbg("usbip_net_send failed: %d", rc);
+		return -1;
+	}
+
+	return 0;
+}
+
+int usbip_net_recv_op_common(int sockfd, uint16_t *code)
+{
+	struct op_common op_common;
+	int rc;
+
+	memset(&op_common, 0, sizeof(op_common));
+
+	rc = usbip_net_recv(sockfd, &op_common, sizeof(op_common));
+	if (rc < 0) {
+		dbg("usbip_net_recv failed: %d", rc);
+		goto err;
+	}
+
+	PACK_OP_COMMON(0, &op_common);
+
+	if (op_common.version != USBIP_VERSION) {
+		dbg("version mismatch: %d %d", op_common.version,
+		    USBIP_VERSION);
+		goto err;
+	}
+
+	switch (*code) {
+	case OP_UNSPEC:
+		break;
+	default:
+		if (op_common.code != *code) {
+			dbg("unexpected pdu %#0x for %#0x", op_common.code,
+			    *code);
+			goto err;
+		}
+	}
+
+	if (op_common.status != ST_OK) {
+		dbg("request failed at peer: %d", op_common.status);
+		goto err;
+	}
+
+	*code = op_common.code;
+
+	return 0;
+err:
+	return -1;
+}
+
+int usbip_net_set_reuseaddr(int sockfd)
+{
+	const int val = 1;
+	int ret;
+
+	ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+	if (ret < 0)
+		dbg("setsockopt: SO_REUSEADDR");
+
+	return ret;
+}
+
+int usbip_net_set_nodelay(int sockfd)
+{
+	const int val = 1;
+	int ret;
+
+	ret = setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
+	if (ret < 0)
+		dbg("setsockopt: TCP_NODELAY");
+
+	return ret;
+}
+
+int usbip_net_set_keepalive(int sockfd)
+{
+	const int val = 1;
+	int ret;
+
+	ret = setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val));
+	if (ret < 0)
+		dbg("setsockopt: SO_KEEPALIVE");
+
+	return ret;
+}
+
+int usbip_net_set_v6only(int sockfd)
+{
+	const int val = 1;
+	int ret;
+
+	ret = setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
+	if (ret < 0)
+		dbg("setsockopt: IPV6_V6ONLY");
+
+	return ret;
+}
+
+/*
+ * IPv6 Ready
+ */
+int usbip_net_tcp_connect(char *hostname, char *service)
+{
+	struct addrinfo hints, *res, *rp;
+	int sockfd;
+	int ret;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+
+	/* get all possible addresses */
+	ret = getaddrinfo(hostname, service, &hints, &res);
+	if (ret < 0) {
+		dbg("getaddrinfo: %s service %s: %s", hostname, service,
+		    gai_strerror(ret));
+		return ret;
+	}
+
+	/* try the addresses */
+	for (rp = res; rp; rp = rp->ai_next) {
+		sockfd = socket(rp->ai_family, rp->ai_socktype,
+				rp->ai_protocol);
+		if (sockfd < 0)
+			continue;
+
+		/* should set TCP_NODELAY for usbip */
+		usbip_net_set_nodelay(sockfd);
+		/* TODO: write code for heartbeat */
+		usbip_net_set_keepalive(sockfd);
+
+		if (connect(sockfd, rp->ai_addr, rp->ai_addrlen) == 0)
+			break;
+
+		close(sockfd);
+	}
+
+	freeaddrinfo(res);
+
+	if (!rp)
+		return EAI_SYSTEM;
+
+	return sockfd;
+}
diff --git a/tools/usb/usbip/src/usbip_network.h b/tools/usb/usbip/src/usbip_network.h
new file mode 100644
index 000000000000..c1e875cf1078
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_network.h
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2005-2007 Takahiro Hirofuchi
+ */
+
+#ifndef __USBIP_NETWORK_H
+#define __USBIP_NETWORK_H
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+#include <sys/types.h>
+
+#include <stdint.h>
+
+extern int usbip_port;
+extern char *usbip_port_string;
+void usbip_setup_port_number(char *arg);
+
+/* ---------------------------------------------------------------------- */
+/* Common header for all the kinds of PDUs. */
+struct op_common {
+	uint16_t version;
+
+#define OP_REQUEST	(0x80 << 8)
+#define OP_REPLY	(0x00 << 8)
+	uint16_t code;
+
+	/* add more error code */
+#define ST_OK	0x00
+#define ST_NA	0x01
+	uint32_t status; /* op_code status (for reply) */
+
+} __attribute__((packed));
+
+#define PACK_OP_COMMON(pack, op_common)  do {\
+	usbip_net_pack_uint16_t(pack, &(op_common)->version);\
+	usbip_net_pack_uint16_t(pack, &(op_common)->code);\
+	usbip_net_pack_uint32_t(pack, &(op_common)->status);\
+} while (0)
+
+/* ---------------------------------------------------------------------- */
+/* Dummy Code */
+#define OP_UNSPEC	0x00
+#define OP_REQ_UNSPEC	OP_UNSPEC
+#define OP_REP_UNSPEC	OP_UNSPEC
+
+/* ---------------------------------------------------------------------- */
+/* Retrieve USB device information. (still not used) */
+#define OP_DEVINFO	0x02
+#define OP_REQ_DEVINFO	(OP_REQUEST | OP_DEVINFO)
+#define OP_REP_DEVINFO	(OP_REPLY   | OP_DEVINFO)
+
+struct op_devinfo_request {
+	char busid[SYSFS_BUS_ID_SIZE];
+} __attribute__((packed));
+
+struct op_devinfo_reply {
+	struct usbip_usb_device udev;
+	struct usbip_usb_interface uinf[];
+} __attribute__((packed));
+
+/* ---------------------------------------------------------------------- */
+/* Import a remote USB device. */
+#define OP_IMPORT	0x03
+#define OP_REQ_IMPORT	(OP_REQUEST | OP_IMPORT)
+#define OP_REP_IMPORT   (OP_REPLY   | OP_IMPORT)
+
+struct op_import_request {
+	char busid[SYSFS_BUS_ID_SIZE];
+} __attribute__((packed));
+
+struct op_import_reply {
+	struct usbip_usb_device udev;
+//	struct usbip_usb_interface uinf[];
+} __attribute__((packed));
+
+#define PACK_OP_IMPORT_REQUEST(pack, request)  do {\
+} while (0)
+
+#define PACK_OP_IMPORT_REPLY(pack, reply)  do {\
+	usbip_net_pack_usb_device(pack, &(reply)->udev);\
+} while (0)
+
+/* ---------------------------------------------------------------------- */
+/* Export a USB device to a remote host. */
+#define OP_EXPORT	0x06
+#define OP_REQ_EXPORT	(OP_REQUEST | OP_EXPORT)
+#define OP_REP_EXPORT	(OP_REPLY   | OP_EXPORT)
+
+struct op_export_request {
+	struct usbip_usb_device udev;
+} __attribute__((packed));
+
+struct op_export_reply {
+	int returncode;
+} __attribute__((packed));
+
+
+#define PACK_OP_EXPORT_REQUEST(pack, request)  do {\
+	usbip_net_pack_usb_device(pack, &(request)->udev);\
+} while (0)
+
+#define PACK_OP_EXPORT_REPLY(pack, reply)  do {\
+} while (0)
+
+/* ---------------------------------------------------------------------- */
+/* un-Export a USB device from a remote host. */
+#define OP_UNEXPORT	0x07
+#define OP_REQ_UNEXPORT	(OP_REQUEST | OP_UNEXPORT)
+#define OP_REP_UNEXPORT	(OP_REPLY   | OP_UNEXPORT)
+
+struct op_unexport_request {
+	struct usbip_usb_device udev;
+} __attribute__((packed));
+
+struct op_unexport_reply {
+	int returncode;
+} __attribute__((packed));
+
+#define PACK_OP_UNEXPORT_REQUEST(pack, request)  do {\
+	usbip_net_pack_usb_device(pack, &(request)->udev);\
+} while (0)
+
+#define PACK_OP_UNEXPORT_REPLY(pack, reply)  do {\
+} while (0)
+
+/* ---------------------------------------------------------------------- */
+/* Negotiate IPSec encryption key. (still not used) */
+#define OP_CRYPKEY	0x04
+#define OP_REQ_CRYPKEY	(OP_REQUEST | OP_CRYPKEY)
+#define OP_REP_CRYPKEY	(OP_REPLY   | OP_CRYPKEY)
+
+struct op_crypkey_request {
+	/* 128bit key */
+	uint32_t key[4];
+} __attribute__((packed));
+
+struct op_crypkey_reply {
+	uint32_t __reserved;
+} __attribute__((packed));
+
+
+/* ---------------------------------------------------------------------- */
+/* Retrieve the list of exported USB devices. */
+#define OP_DEVLIST	0x05
+#define OP_REQ_DEVLIST	(OP_REQUEST | OP_DEVLIST)
+#define OP_REP_DEVLIST	(OP_REPLY   | OP_DEVLIST)
+
+struct op_devlist_request {
+} __attribute__((packed));
+
+struct op_devlist_reply {
+	uint32_t ndev;
+	/* followed by reply_extra[] */
+} __attribute__((packed));
+
+struct op_devlist_reply_extra {
+	struct usbip_usb_device    udev;
+	struct usbip_usb_interface uinf[];
+} __attribute__((packed));
+
+#define PACK_OP_DEVLIST_REQUEST(pack, request)  do {\
+} while (0)
+
+#define PACK_OP_DEVLIST_REPLY(pack, reply)  do {\
+	usbip_net_pack_uint32_t(pack, &(reply)->ndev);\
+} while (0)
+
+void usbip_net_pack_uint32_t(int pack, uint32_t *num);
+void usbip_net_pack_uint16_t(int pack, uint16_t *num);
+void usbip_net_pack_usb_device(int pack, struct usbip_usb_device *udev);
+void usbip_net_pack_usb_interface(int pack, struct usbip_usb_interface *uinf);
+
+ssize_t usbip_net_recv(int sockfd, void *buff, size_t bufflen);
+ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen);
+int usbip_net_send_op_common(int sockfd, uint32_t code, uint32_t status);
+int usbip_net_recv_op_common(int sockfd, uint16_t *code);
+int usbip_net_set_reuseaddr(int sockfd);
+int usbip_net_set_nodelay(int sockfd);
+int usbip_net_set_keepalive(int sockfd);
+int usbip_net_set_v6only(int sockfd);
+int usbip_net_tcp_connect(char *hostname, char *port);
+
+#endif /* __USBIP_NETWORK_H */
diff --git a/tools/usb/usbip/src/usbip_port.c b/tools/usb/usbip/src/usbip_port.c
new file mode 100644
index 000000000000..a2e884fd9226
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_port.c
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+
+#include "vhci_driver.h"
+#include "usbip_common.h"
+
+static int list_imported_devices(void)
+{
+	int i;
+	struct usbip_imported_device *idev;
+	int ret;
+
+	ret = usbip_vhci_driver_open();
+	if (ret < 0) {
+		err("open vhci_driver");
+		return -1;
+	}
+
+	printf("Imported USB devices\n");
+	printf("====================\n");
+
+	for (i = 0; i < vhci_driver->nports; i++) {
+		idev = &vhci_driver->idev[i];
+
+		if (usbip_vhci_imported_device_dump(idev) < 0)
+			ret = -1;
+	}
+
+	usbip_vhci_driver_close();
+
+	return ret;
+
+}
+
+int usbip_port_show(__attribute__((unused)) int argc,
+		    __attribute__((unused)) char *argv[])
+{
+	int ret;
+
+	ret = list_imported_devices();
+	if (ret < 0)
+		err("list imported devices");
+
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbip_unbind.c b/tools/usb/usbip/src/usbip_unbind.c
new file mode 100644
index 000000000000..a4a496c9cbaf
--- /dev/null
+++ b/tools/usb/usbip/src/usbip_unbind.c
@@ -0,0 +1,141 @@
+/*
+ * 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 <libudev.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <getopt.h>
+
+#include "usbip_common.h"
+#include "utils.h"
+#include "usbip.h"
+#include "sysfs_utils.h"
+
+static const char usbip_unbind_usage_string[] =
+	"usbip unbind <args>\n"
+	"    -b, --busid=<busid>    Unbind " USBIP_HOST_DRV_NAME ".ko from "
+	"device on <busid>\n";
+
+void usbip_unbind_usage(void)
+{
+	printf("usage: %s", usbip_unbind_usage_string);
+}
+
+static int unbind_device(char *busid)
+{
+	char bus_type[] = "usb";
+	int rc, ret = -1;
+
+	char unbind_attr_name[] = "unbind";
+	char unbind_attr_path[SYSFS_PATH_MAX];
+	char rebind_attr_name[] = "rebind";
+	char rebind_attr_path[SYSFS_PATH_MAX];
+
+	struct udev *udev;
+	struct udev_device *dev;
+	const char *driver;
+
+	/* Create libudev context. */
+	udev = udev_new();
+
+	/* Check whether the device with this bus ID exists. */
+	dev = udev_device_new_from_subsystem_sysname(udev, "usb", busid);
+	if (!dev) {
+		err("device with the specified bus ID does not exist");
+		goto err_close_udev;
+	}
+
+	/* Check whether the device is using usbip-host driver. */
+	driver = udev_device_get_driver(dev);
+	if (!driver || strcmp(driver, "usbip-host")) {
+		err("device is not bound to usbip-host driver");
+		goto err_close_udev;
+	}
+
+	/* Unbind device from driver. */
+	snprintf(unbind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
+		 SYSFS_MNT_PATH, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
+		 USBIP_HOST_DRV_NAME, unbind_attr_name);
+
+	rc = write_sysfs_attribute(unbind_attr_path, busid, strlen(busid));
+	if (rc < 0) {
+		err("error unbinding device %s from driver", busid);
+		goto err_close_udev;
+	}
+
+	/* Notify driver of unbind. */
+	rc = modify_match_busid(busid, 0);
+	if (rc < 0) {
+		err("unable to unbind device on %s", busid);
+		goto err_close_udev;
+	}
+
+	/* Trigger new probing. */
+	snprintf(rebind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
+			SYSFS_MNT_PATH, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
+			USBIP_HOST_DRV_NAME, rebind_attr_name);
+
+	rc = write_sysfs_attribute(rebind_attr_path, busid, strlen(busid));
+	if (rc < 0) {
+		err("error rebinding");
+		goto err_close_udev;
+	}
+
+	ret = 0;
+	info("unbind device on busid %s: complete", busid);
+
+err_close_udev:
+	udev_device_unref(dev);
+	udev_unref(udev);
+
+	return ret;
+}
+
+int usbip_unbind(int argc, char *argv[])
+{
+	static const struct option opts[] = {
+		{ "busid", required_argument, NULL, 'b' },
+		{ NULL,    0,                 NULL,  0  }
+	};
+
+	int opt;
+	int ret = -1;
+
+	for (;;) {
+		opt = getopt_long(argc, argv, "b:", opts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case 'b':
+			ret = unbind_device(optarg);
+			goto out;
+		default:
+			goto err_out;
+		}
+	}
+
+err_out:
+	usbip_unbind_usage();
+out:
+	return ret;
+}
diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
new file mode 100644
index 000000000000..2f87f2d348ba
--- /dev/null
+++ b/tools/usb/usbip/src/usbipd.c
@@ -0,0 +1,679 @@
+/*
+ * 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/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#ifdef HAVE_LIBWRAP
+#include <tcpd.h>
+#endif
+
+#include <getopt.h>
+#include <signal.h>
+#include <poll.h>
+
+#include "usbip_host_driver.h"
+#include "usbip_common.h"
+#include "usbip_network.h"
+#include "list.h"
+
+#undef  PROGNAME
+#define PROGNAME "usbipd"
+#define MAXSOCKFD 20
+
+#define MAIN_LOOP_TIMEOUT 10
+
+#define DEFAULT_PID_FILE "/var/run/" PROGNAME ".pid"
+
+static const char usbip_version_string[] = PACKAGE_STRING;
+
+static const char usbipd_help_string[] =
+	"usage: usbipd [options]\n"
+	"\n"
+	"	-4, --ipv4\n"
+	"		Bind to IPv4. Default is both.\n"
+	"\n"
+	"	-6, --ipv6\n"
+	"		Bind to IPv6. Default is both.\n"
+	"\n"
+	"	-D, --daemon\n"
+	"		Run as a daemon process.\n"
+	"\n"
+	"	-d, --debug\n"
+	"		Print debugging information.\n"
+	"\n"
+	"	-PFILE, --pid FILE\n"
+	"		Write process id to FILE.\n"
+	"		If no FILE specified, use " DEFAULT_PID_FILE "\n"
+	"\n"
+	"	-tPORT, --tcp-port PORT\n"
+	"		Listen on TCP/IP port PORT.\n"
+	"\n"
+	"	-h, --help\n"
+	"		Print this help.\n"
+	"\n"
+	"	-v, --version\n"
+	"		Show version.\n";
+
+static void usbipd_help(void)
+{
+	printf("%s\n", usbipd_help_string);
+}
+
+static int recv_request_import(int sockfd)
+{
+	struct op_import_request req;
+	struct op_common reply;
+	struct usbip_exported_device *edev;
+	struct usbip_usb_device pdu_udev;
+	struct list_head *i;
+	int found = 0;
+	int error = 0;
+	int rc;
+
+	memset(&req, 0, sizeof(req));
+	memset(&reply, 0, sizeof(reply));
+
+	rc = usbip_net_recv(sockfd, &req, sizeof(req));
+	if (rc < 0) {
+		dbg("usbip_net_recv failed: import request");
+		return -1;
+	}
+	PACK_OP_IMPORT_REQUEST(0, &req);
+
+	list_for_each(i, &host_driver->edev_list) {
+		edev = list_entry(i, struct usbip_exported_device, node);
+		if (!strncmp(req.busid, edev->udev.busid, SYSFS_BUS_ID_SIZE)) {
+			info("found requested device: %s", req.busid);
+			found = 1;
+			break;
+		}
+	}
+
+	if (found) {
+		/* should set TCP_NODELAY for usbip */
+		usbip_net_set_nodelay(sockfd);
+
+		/* export device needs a TCP/IP socket descriptor */
+		rc = usbip_host_export_device(edev, sockfd);
+		if (rc < 0)
+			error = 1;
+	} else {
+		info("requested device not found: %s", req.busid);
+		error = 1;
+	}
+
+	rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT,
+				      (!error ? ST_OK : ST_NA));
+	if (rc < 0) {
+		dbg("usbip_net_send_op_common failed: %#0x", OP_REP_IMPORT);
+		return -1;
+	}
+
+	if (error) {
+		dbg("import request busid %s: failed", req.busid);
+		return -1;
+	}
+
+	memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
+	usbip_net_pack_usb_device(1, &pdu_udev);
+
+	rc = usbip_net_send(sockfd, &pdu_udev, sizeof(pdu_udev));
+	if (rc < 0) {
+		dbg("usbip_net_send failed: devinfo");
+		return -1;
+	}
+
+	dbg("import request busid %s: complete", req.busid);
+
+	return 0;
+}
+
+static int send_reply_devlist(int connfd)
+{
+	struct usbip_exported_device *edev;
+	struct usbip_usb_device pdu_udev;
+	struct usbip_usb_interface pdu_uinf;
+	struct op_devlist_reply reply;
+	struct list_head *j;
+	int rc, i;
+
+	reply.ndev = 0;
+	/* number of exported devices */
+	list_for_each(j, &host_driver->edev_list) {
+		reply.ndev += 1;
+	}
+	info("exportable devices: %d", reply.ndev);
+
+	rc = usbip_net_send_op_common(connfd, OP_REP_DEVLIST, ST_OK);
+	if (rc < 0) {
+		dbg("usbip_net_send_op_common failed: %#0x", OP_REP_DEVLIST);
+		return -1;
+	}
+	PACK_OP_DEVLIST_REPLY(1, &reply);
+
+	rc = usbip_net_send(connfd, &reply, sizeof(reply));
+	if (rc < 0) {
+		dbg("usbip_net_send failed: %#0x", OP_REP_DEVLIST);
+		return -1;
+	}
+
+	list_for_each(j, &host_driver->edev_list) {
+		edev = list_entry(j, struct usbip_exported_device, node);
+		dump_usb_device(&edev->udev);
+		memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
+		usbip_net_pack_usb_device(1, &pdu_udev);
+
+		rc = usbip_net_send(connfd, &pdu_udev, sizeof(pdu_udev));
+		if (rc < 0) {
+			dbg("usbip_net_send failed: pdu_udev");
+			return -1;
+		}
+
+		for (i = 0; i < edev->udev.bNumInterfaces; i++) {
+			dump_usb_interface(&edev->uinf[i]);
+			memcpy(&pdu_uinf, &edev->uinf[i], sizeof(pdu_uinf));
+			usbip_net_pack_usb_interface(1, &pdu_uinf);
+
+			rc = usbip_net_send(connfd, &pdu_uinf,
+					sizeof(pdu_uinf));
+			if (rc < 0) {
+				err("usbip_net_send failed: pdu_uinf");
+				return -1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int recv_request_devlist(int connfd)
+{
+	struct op_devlist_request req;
+	int rc;
+
+	memset(&req, 0, sizeof(req));
+
+	rc = usbip_net_recv(connfd, &req, sizeof(req));
+	if (rc < 0) {
+		dbg("usbip_net_recv failed: devlist request");
+		return -1;
+	}
+
+	rc = send_reply_devlist(connfd);
+	if (rc < 0) {
+		dbg("send_reply_devlist failed");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int recv_pdu(int connfd)
+{
+	uint16_t code = OP_UNSPEC;
+	int ret;
+
+	ret = usbip_net_recv_op_common(connfd, &code);
+	if (ret < 0) {
+		dbg("could not receive opcode: %#0x", code);
+		return -1;
+	}
+
+	ret = usbip_host_refresh_device_list();
+	if (ret < 0) {
+		dbg("could not refresh device list: %d", ret);
+		return -1;
+	}
+
+	info("received request: %#0x(%d)", code, connfd);
+	switch (code) {
+	case OP_REQ_DEVLIST:
+		ret = recv_request_devlist(connfd);
+		break;
+	case OP_REQ_IMPORT:
+		ret = recv_request_import(connfd);
+		break;
+	case OP_REQ_DEVINFO:
+	case OP_REQ_CRYPKEY:
+	default:
+		err("received an unknown opcode: %#0x", code);
+		ret = -1;
+	}
+
+	if (ret == 0)
+		info("request %#0x(%d): complete", code, connfd);
+	else
+		info("request %#0x(%d): failed", code, connfd);
+
+	return ret;
+}
+
+#ifdef HAVE_LIBWRAP
+static int tcpd_auth(int connfd)
+{
+	struct request_info request;
+	int rc;
+
+	request_init(&request, RQ_DAEMON, PROGNAME, RQ_FILE, connfd, 0);
+	fromhost(&request);
+	rc = hosts_access(&request);
+	if (rc == 0)
+		return -1;
+
+	return 0;
+}
+#endif
+
+static int do_accept(int listenfd)
+{
+	int connfd;
+	struct sockaddr_storage ss;
+	socklen_t len = sizeof(ss);
+	char host[NI_MAXHOST], port[NI_MAXSERV];
+	int rc;
+
+	memset(&ss, 0, sizeof(ss));
+
+	connfd = accept(listenfd, (struct sockaddr *)&ss, &len);
+	if (connfd < 0) {
+		err("failed to accept connection");
+		return -1;
+	}
+
+	rc = getnameinfo((struct sockaddr *)&ss, len, host, sizeof(host),
+			 port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+	if (rc)
+		err("getnameinfo: %s", gai_strerror(rc));
+
+#ifdef HAVE_LIBWRAP
+	rc = tcpd_auth(connfd);
+	if (rc < 0) {
+		info("denied access from %s", host);
+		close(connfd);
+		return -1;
+	}
+#endif
+	info("connection from %s:%s", host, port);
+
+	return connfd;
+}
+
+int process_request(int listenfd)
+{
+	pid_t childpid;
+	int connfd;
+
+	connfd = do_accept(listenfd);
+	if (connfd < 0)
+		return -1;
+	childpid = fork();
+	if (childpid == 0) {
+		close(listenfd);
+		recv_pdu(connfd);
+		exit(0);
+	}
+	close(connfd);
+	return 0;
+}
+
+static void addrinfo_to_text(struct addrinfo *ai, char buf[],
+			     const size_t buf_size)
+{
+	char hbuf[NI_MAXHOST];
+	char sbuf[NI_MAXSERV];
+	int rc;
+
+	buf[0] = '\0';
+
+	rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf, sizeof(hbuf),
+			 sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV);
+	if (rc)
+		err("getnameinfo: %s", gai_strerror(rc));
+
+	snprintf(buf, buf_size, "%s:%s", hbuf, sbuf);
+}
+
+static int listen_all_addrinfo(struct addrinfo *ai_head, int sockfdlist[],
+			     int maxsockfd)
+{
+	struct addrinfo *ai;
+	int ret, nsockfd = 0;
+	const size_t ai_buf_size = NI_MAXHOST + NI_MAXSERV + 2;
+	char ai_buf[ai_buf_size];
+
+	for (ai = ai_head; ai && nsockfd < maxsockfd; ai = ai->ai_next) {
+		int sock;
+
+		addrinfo_to_text(ai, ai_buf, ai_buf_size);
+		dbg("opening %s", ai_buf);
+		sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+		if (sock < 0) {
+			err("socket: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			continue;
+		}
+
+		usbip_net_set_reuseaddr(sock);
+		usbip_net_set_nodelay(sock);
+		/* We use seperate sockets for IPv4 and IPv6
+		 * (see do_standalone_mode()) */
+		usbip_net_set_v6only(sock);
+
+		if (sock >= FD_SETSIZE) {
+			err("FD_SETSIZE: %s: sock=%d, max=%d",
+			    ai_buf, sock, FD_SETSIZE);
+			close(sock);
+			continue;
+		}
+
+		ret = bind(sock, ai->ai_addr, ai->ai_addrlen);
+		if (ret < 0) {
+			err("bind: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			close(sock);
+			continue;
+		}
+
+		ret = listen(sock, SOMAXCONN);
+		if (ret < 0) {
+			err("listen: %s: %d (%s)",
+			    ai_buf, errno, strerror(errno));
+			close(sock);
+			continue;
+		}
+
+		info("listening on %s", ai_buf);
+		sockfdlist[nsockfd++] = sock;
+	}
+
+	return nsockfd;
+}
+
+static struct addrinfo *do_getaddrinfo(char *host, int ai_family)
+{
+	struct addrinfo hints, *ai_head;
+	int rc;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family   = ai_family;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags    = AI_PASSIVE;
+
+	rc = getaddrinfo(host, usbip_port_string, &hints, &ai_head);
+	if (rc) {
+		err("failed to get a network address %s: %s", usbip_port_string,
+		    gai_strerror(rc));
+		return NULL;
+	}
+
+	return ai_head;
+}
+
+static void signal_handler(int i)
+{
+	dbg("received '%s' signal", strsignal(i));
+}
+
+static void set_signal(void)
+{
+	struct sigaction act;
+
+	memset(&act, 0, sizeof(act));
+	act.sa_handler = signal_handler;
+	sigemptyset(&act.sa_mask);
+	sigaction(SIGTERM, &act, NULL);
+	sigaction(SIGINT, &act, NULL);
+	act.sa_handler = SIG_IGN;
+	sigaction(SIGCLD, &act, NULL);
+}
+
+static const char *pid_file;
+
+static void write_pid_file(void)
+{
+	if (pid_file) {
+		dbg("creating pid file %s", pid_file);
+		FILE *fp;
+
+		fp = fopen(pid_file, "w");
+		if (!fp) {
+			err("pid_file: %s: %d (%s)",
+			    pid_file, errno, strerror(errno));
+			return;
+		}
+		fprintf(fp, "%d\n", getpid());
+		fclose(fp);
+	}
+}
+
+static void remove_pid_file(void)
+{
+	if (pid_file) {
+		dbg("removing pid file %s", pid_file);
+		unlink(pid_file);
+	}
+}
+
+static int do_standalone_mode(int daemonize, int ipv4, int ipv6)
+{
+	struct addrinfo *ai_head;
+	int sockfdlist[MAXSOCKFD];
+	int nsockfd, family;
+	int i, terminate;
+	struct pollfd *fds;
+	struct timespec timeout;
+	sigset_t sigmask;
+
+	if (usbip_host_driver_open()) {
+		err("please load " USBIP_CORE_MOD_NAME ".ko and "
+		    USBIP_HOST_DRV_NAME ".ko!");
+		return -1;
+	}
+
+	if (daemonize) {
+		if (daemon(0, 0) < 0) {
+			err("daemonizing failed: %s", strerror(errno));
+			usbip_host_driver_close();
+			return -1;
+		}
+		umask(0);
+		usbip_use_syslog = 1;
+	}
+	set_signal();
+	write_pid_file();
+
+	info("starting " PROGNAME " (%s)", usbip_version_string);
+
+	/*
+	 * To suppress warnings on systems with bindv6only disabled
+	 * (default), we use seperate sockets for IPv6 and IPv4 and set
+	 * IPV6_V6ONLY on the IPv6 sockets.
+	 */
+	if (ipv4 && ipv6)
+		family = AF_UNSPEC;
+	else if (ipv4)
+		family = AF_INET;
+	else
+		family = AF_INET6;
+
+	ai_head = do_getaddrinfo(NULL, family);
+	if (!ai_head) {
+		usbip_host_driver_close();
+		return -1;
+	}
+	nsockfd = listen_all_addrinfo(ai_head, sockfdlist,
+		sizeof(sockfdlist) / sizeof(*sockfdlist));
+	freeaddrinfo(ai_head);
+	if (nsockfd <= 0) {
+		err("failed to open a listening socket");
+		usbip_host_driver_close();
+		return -1;
+	}
+
+	dbg("listening on %d address%s", nsockfd, (nsockfd == 1) ? "" : "es");
+
+	fds = calloc(nsockfd, sizeof(struct pollfd));
+	for (i = 0; i < nsockfd; i++) {
+		fds[i].fd = sockfdlist[i];
+		fds[i].events = POLLIN;
+	}
+	timeout.tv_sec = MAIN_LOOP_TIMEOUT;
+	timeout.tv_nsec = 0;
+
+	sigfillset(&sigmask);
+	sigdelset(&sigmask, SIGTERM);
+	sigdelset(&sigmask, SIGINT);
+
+	terminate = 0;
+	while (!terminate) {
+		int r;
+
+		r = ppoll(fds, nsockfd, &timeout, &sigmask);
+		if (r < 0) {
+			dbg("%s", strerror(errno));
+			terminate = 1;
+		} else if (r) {
+			for (i = 0; i < nsockfd; i++) {
+				if (fds[i].revents & POLLIN) {
+					dbg("read event on fd[%d]=%d",
+					    i, sockfdlist[i]);
+					process_request(sockfdlist[i]);
+				}
+			}
+		} else {
+			dbg("heartbeat timeout on ppoll()");
+		}
+	}
+
+	info("shutting down " PROGNAME);
+	free(fds);
+	usbip_host_driver_close();
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	static const struct option longopts[] = {
+		{ "ipv4",     no_argument,       NULL, '4' },
+		{ "ipv6",     no_argument,       NULL, '6' },
+		{ "daemon",   no_argument,       NULL, 'D' },
+		{ "daemon",   no_argument,       NULL, 'D' },
+		{ "debug",    no_argument,       NULL, 'd' },
+		{ "pid",      optional_argument, NULL, 'P' },
+		{ "tcp-port", required_argument, NULL, 't' },
+		{ "help",     no_argument,       NULL, 'h' },
+		{ "version",  no_argument,       NULL, 'v' },
+		{ NULL,	      0,                 NULL,  0  }
+	};
+
+	enum {
+		cmd_standalone_mode = 1,
+		cmd_help,
+		cmd_version
+	} cmd;
+
+	int daemonize = 0;
+	int ipv4 = 0, ipv6 = 0;
+	int opt, rc = -1;
+
+	pid_file = NULL;
+
+	usbip_use_stderr = 1;
+	usbip_use_syslog = 0;
+
+	if (geteuid() != 0)
+		err("not running as root?");
+
+	cmd = cmd_standalone_mode;
+	for (;;) {
+		opt = getopt_long(argc, argv, "46DdP::t:hv", longopts, NULL);
+
+		if (opt == -1)
+			break;
+
+		switch (opt) {
+		case '4':
+			ipv4 = 1;
+			break;
+		case '6':
+			ipv6 = 1;
+			break;
+		case 'D':
+			daemonize = 1;
+			break;
+		case 'd':
+			usbip_use_debug = 1;
+			break;
+		case 'h':
+			cmd = cmd_help;
+			break;
+		case 'P':
+			pid_file = optarg ? optarg : DEFAULT_PID_FILE;
+			break;
+		case 't':
+			usbip_setup_port_number(optarg);
+			break;
+		case 'v':
+			cmd = cmd_version;
+			break;
+		case '?':
+			usbipd_help();
+		default:
+			goto err_out;
+		}
+	}
+
+	if (!ipv4 && !ipv6)
+		ipv4 = ipv6 = 1;
+
+	switch (cmd) {
+	case cmd_standalone_mode:
+		rc = do_standalone_mode(daemonize, ipv4, ipv6);
+		remove_pid_file();
+		break;
+	case cmd_version:
+		printf(PROGNAME " (%s)\n", usbip_version_string);
+		rc = 0;
+		break;
+	case cmd_help:
+		usbipd_help();
+		rc = 0;
+		break;
+	default:
+		usbipd_help();
+		goto err_out;
+	}
+
+err_out:
+	return (rc > -1 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
diff --git a/tools/usb/usbip/src/utils.c b/tools/usb/usbip/src/utils.c
new file mode 100644
index 000000000000..2b3d6d235015
--- /dev/null
+++ b/tools/usb/usbip/src/utils.c
@@ -0,0 +1,52 @@
+/*
+ * 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 <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "usbip_common.h"
+#include "utils.h"
+#include "sysfs_utils.h"
+
+int modify_match_busid(char *busid, int add)
+{
+	char attr_name[] = "match_busid";
+	char command[SYSFS_BUS_ID_SIZE + 4];
+	char match_busid_attr_path[SYSFS_PATH_MAX];
+	int rc;
+
+	snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
+		 "%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
+		 SYSFS_BUS_TYPE, SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME,
+		 attr_name);
+
+	if (add)
+		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s", busid);
+	else
+		snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s", busid);
+
+	rc = write_sysfs_attribute(match_busid_attr_path, command,
+				   sizeof(command));
+	if (rc < 0) {
+		dbg("failed to write match_busid: %s", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/tools/usb/usbip/src/utils.h b/tools/usb/usbip/src/utils.h
new file mode 100644
index 000000000000..5916fd3e02a6
--- /dev/null
+++ b/tools/usb/usbip/src/utils.h
@@ -0,0 +1,25 @@
+/*
+ * 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 __UTILS_H
+#define __UTILS_H
+
+int modify_match_busid(char *busid, int add);
+
+#endif /* __UTILS_H */
+