diff options
Diffstat (limited to 'drivers/staging/usbip/userspace/src/usbip_bind.c')
| -rw-r--r-- | drivers/staging/usbip/userspace/src/usbip_bind.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/drivers/staging/usbip/userspace/src/usbip_bind.c b/drivers/staging/usbip/userspace/src/usbip_bind.c deleted file mode 100644 index fa46141ae68b..000000000000 --- a/drivers/staging/usbip/userspace/src/usbip_bind.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * 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; -} |