1ccea77e2a
Based on 2 normalized pattern(s): 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 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 [based] [from] [clk] [highbank] [c] you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 355 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
130 lines
2.8 KiB
C
130 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
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* 2005-2007 Takahiro Hirofuchi
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*/
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#include <libudev.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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#include "usbip_common.h"
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#include "utils.h"
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#include "usbip.h"
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#include "sysfs_utils.h"
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static const char usbip_unbind_usage_string[] =
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"usbip unbind <args>\n"
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" -b, --busid=<busid> Unbind " USBIP_HOST_DRV_NAME ".ko from "
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"device on <busid>\n";
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void usbip_unbind_usage(void)
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{
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printf("usage: %s", usbip_unbind_usage_string);
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}
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static int unbind_device(char *busid)
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{
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char bus_type[] = "usb";
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int rc, ret = -1;
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char unbind_attr_name[] = "unbind";
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char unbind_attr_path[SYSFS_PATH_MAX];
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char rebind_attr_name[] = "rebind";
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char rebind_attr_path[SYSFS_PATH_MAX];
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struct udev *udev;
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struct udev_device *dev;
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const char *driver;
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/* Create libudev context. */
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udev = udev_new();
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/* Check whether the device with this bus ID exists. */
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dev = udev_device_new_from_subsystem_sysname(udev, "usb", busid);
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if (!dev) {
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err("device with the specified bus ID does not exist");
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goto err_close_udev;
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}
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/* Check whether the device is using usbip-host driver. */
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driver = udev_device_get_driver(dev);
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if (!driver || strcmp(driver, "usbip-host")) {
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err("device is not bound to usbip-host driver");
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goto err_close_udev;
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}
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/* Unbind device from driver. */
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snprintf(unbind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
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SYSFS_MNT_PATH, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
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USBIP_HOST_DRV_NAME, unbind_attr_name);
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rc = write_sysfs_attribute(unbind_attr_path, busid, strlen(busid));
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if (rc < 0) {
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err("error unbinding device %s from driver", busid);
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goto err_close_udev;
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}
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/* Notify driver of unbind. */
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rc = modify_match_busid(busid, 0);
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if (rc < 0) {
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err("unable to unbind device on %s", busid);
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goto err_close_udev;
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}
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/* Trigger new probing. */
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snprintf(rebind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
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SYSFS_MNT_PATH, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
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USBIP_HOST_DRV_NAME, rebind_attr_name);
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rc = write_sysfs_attribute(rebind_attr_path, busid, strlen(busid));
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if (rc < 0) {
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err("error rebinding");
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goto err_close_udev;
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}
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ret = 0;
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info("unbind device on busid %s: complete", busid);
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err_close_udev:
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udev_device_unref(dev);
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udev_unref(udev);
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return ret;
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}
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int usbip_unbind(int argc, char *argv[])
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{
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static const struct option opts[] = {
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{ "busid", required_argument, NULL, 'b' },
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{ NULL, 0, NULL, 0 }
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};
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int opt;
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int ret = -1;
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for (;;) {
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opt = getopt_long(argc, argv, "b:", opts, NULL);
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if (opt == -1)
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break;
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switch (opt) {
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case 'b':
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ret = unbind_device(optarg);
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goto out;
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default:
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goto err_out;
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}
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}
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err_out:
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usbip_unbind_usage();
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out:
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return ret;
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}
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