2 * Copyright (C) 2015-2016 Samsung Electronics
3 * Igor Kotrasinski <i.kotrasinsk@samsung.com>
4 * Krzysztof Opasiak <k.opasiak@samsung.com>
6 * Refactored from usbip_host_driver.c, which is:
7 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
8 * 2005-2007 Takahiro Hirofuchi
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/types.h>
33 #include "usbip_common.h"
34 #include "usbip_host_common.h"
36 #include "sysfs_utils.h"
38 struct udev *udev_context;
40 static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
42 char status_attr_path[SYSFS_PATH_MAX];
46 char status[2] = { 0 };
49 size = snprintf(status_attr_path, sizeof(status_attr_path),
50 "%s/usbip_status", udev->path);
51 if (size < 0 || (unsigned int)size >= sizeof(status_attr_path)) {
52 err("usbip_status path length %i >= %lu or < 0", size,
53 (long unsigned)sizeof(status_attr_path));
58 fd = open(status_attr_path, O_RDONLY);
60 err("error opening attribute %s", status_attr_path);
64 length = read(fd, status, 1);
66 err("error reading attribute %s", status_attr_path);
77 struct usbip_exported_device *usbip_exported_device_new(
78 struct usbip_host_driver *hdriver, const char *sdevpath)
80 struct usbip_exported_device *edev = NULL;
81 struct usbip_exported_device *edev_old;
85 edev = calloc(1, sizeof(struct usbip_exported_device));
88 udev_device_new_from_syspath(udev_context, sdevpath);
90 err("udev_device_new_from_syspath: %s", sdevpath);
94 if (hdriver->ops.read_device(edev->sudev, &edev->udev) < 0)
97 edev->status = read_attr_usbip_status(&edev->udev);
101 /* reallocate buffer to include usb interface data */
102 size = sizeof(struct usbip_exported_device) +
103 edev->udev.bNumInterfaces * sizeof(struct usbip_usb_interface);
106 edev = realloc(edev, size);
109 dbg("realloc failed");
113 for (i = 0; i < edev->udev.bNumInterfaces; i++) {
114 /* vudc does not support reading interfaces */
115 if (!hdriver->ops.read_interface)
117 hdriver->ops.read_interface(&edev->udev, i, &edev->uinf[i]);
123 udev_device_unref(edev->sudev);
130 static int refresh_exported_devices(struct usbip_host_driver *hdriver)
132 struct usbip_exported_device *edev;
133 struct udev_enumerate *enumerate;
134 struct udev_list_entry *devices, *dev_list_entry;
135 struct udev_device *dev;
138 enumerate = udev_enumerate_new(udev_context);
139 udev_enumerate_add_match_subsystem(enumerate, hdriver->udev_subsystem);
140 udev_enumerate_scan_devices(enumerate);
142 devices = udev_enumerate_get_list_entry(enumerate);
144 udev_list_entry_foreach(dev_list_entry, devices) {
145 path = udev_list_entry_get_name(dev_list_entry);
146 dev = udev_device_new_from_syspath(udev_context,
151 /* Check whether device uses usbip driver. */
152 if (hdriver->ops.is_my_device(dev)) {
153 edev = usbip_exported_device_new(hdriver, path);
155 dbg("usbip_exported_device_new failed");
159 list_add(&edev->node, &hdriver->edev_list);
167 static void usbip_exported_device_destroy(struct list_head *devs)
169 struct list_head *i, *tmp;
170 struct usbip_exported_device *edev;
172 list_for_each_safe(i, tmp, devs) {
173 edev = list_entry(i, struct usbip_exported_device, node);
179 int usbip_generic_driver_open(struct usbip_host_driver *hdriver)
183 udev_context = udev_new();
185 err("udev_new failed");
189 rc = refresh_exported_devices(hdriver);
194 udev_unref(udev_context);
198 void usbip_generic_driver_close(struct usbip_host_driver *hdriver)
203 usbip_exported_device_destroy(&hdriver->edev_list);
205 udev_unref(udev_context);
208 int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver)
212 usbip_exported_device_destroy(&hdriver->edev_list);
215 INIT_LIST_HEAD(&hdriver->edev_list);
217 rc = refresh_exported_devices(hdriver);
224 int usbip_export_device(struct usbip_exported_device *edev, int sockfd)
226 char attr_name[] = "usbip_sockfd";
227 char sockfd_attr_path[SYSFS_PATH_MAX];
229 char sockfd_buff[30];
232 if (edev->status != SDEV_ST_AVAILABLE) {
233 dbg("device not available: %s", edev->udev.busid);
234 switch (edev->status) {
236 dbg("status SDEV_ST_ERROR");
240 dbg("status SDEV_ST_USED");
244 dbg("status unknown: 0x%x", edev->status);
250 /* only the first interface is true */
251 size = snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
252 edev->udev.path, attr_name);
253 if (size < 0 || (unsigned int)size >= sizeof(sockfd_attr_path)) {
254 err("exported device path length %i >= %lu or < 0", size,
255 (long unsigned)sizeof(sockfd_attr_path));
259 size = snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
260 if (size < 0 || (unsigned int)size >= sizeof(sockfd_buff)) {
261 err("socket length %i >= %lu or < 0", size,
262 (long unsigned)sizeof(sockfd_buff));
266 ret = write_sysfs_attribute(sockfd_attr_path, sockfd_buff,
267 strlen(sockfd_buff));
269 err("write_sysfs_attribute failed: sockfd %s to %s",
270 sockfd_buff, sockfd_attr_path);
274 info("connect: %s", edev->udev.busid);
279 struct usbip_exported_device *usbip_generic_get_device(
280 struct usbip_host_driver *hdriver, int num)
283 struct usbip_exported_device *edev;
286 list_for_each(i, &hdriver->edev_list) {
287 edev = list_entry(i, struct usbip_exported_device, node);