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6#include "usbip_common.h"
7#include "vhci_driver.h"
8#include <limits.h>
9#include <netdb.h>
10#include <libudev.h>
11#include <dirent.h>
12#include "sysfs_utils.h"
13
14#undef PROGNAME
15#define PROGNAME "libusbip"
16
17struct usbip_vhci_driver *vhci_driver;
18struct udev *udev_context;
19
20static struct usbip_imported_device *
21imported_device_init(struct usbip_imported_device *idev, char *busid)
22{
23 struct udev_device *sudev;
24
25 sudev = udev_device_new_from_subsystem_sysname(udev_context,
26 "usb", busid);
27 if (!sudev) {
28 dbg("udev_device_new_from_subsystem_sysname failed: %s", busid);
29 goto err;
30 }
31 read_usb_device(sudev, &idev->udev);
32 udev_device_unref(sudev);
33
34 return idev;
35
36err:
37 return NULL;
38}
39
40static int parse_status(const char *value)
41{
42 int ret = 0;
43 char *c;
44
45
46 c = strchr(value, '\n');
47 if (!c)
48 return -1;
49 c++;
50
51 while (*c != '\0') {
52 int port, status, speed, devid;
53 int sockfd;
54 char lbusid[SYSFS_BUS_ID_SIZE];
55 struct usbip_imported_device *idev;
56 char hub[3];
57
58 ret = sscanf(c, "%2s %d %d %d %x %u %31s\n",
59 hub, &port, &status, &speed,
60 &devid, &sockfd, lbusid);
61
62 if (ret < 5) {
63 dbg("sscanf failed: %d", ret);
64 BUG();
65 }
66
67 dbg("hub %s port %d status %d speed %d devid %x",
68 hub, port, status, speed, devid);
69 dbg("sockfd %u lbusid %s", sockfd, lbusid);
70
71
72 idev = &vhci_driver->idev[port];
73 memset(idev, 0, sizeof(*idev));
74
75 if (strncmp("hs", hub, 2) == 0)
76 idev->hub = HUB_SPEED_HIGH;
77 else
78 idev->hub = HUB_SPEED_SUPER;
79
80 idev->port = port;
81 idev->status = status;
82
83 idev->devid = devid;
84
85 idev->busnum = (devid >> 16);
86 idev->devnum = (devid & 0x0000ffff);
87
88 if (idev->status != VDEV_ST_NULL
89 && idev->status != VDEV_ST_NOTASSIGNED) {
90 idev = imported_device_init(idev, lbusid);
91 if (!idev) {
92 dbg("imported_device_init failed");
93 return -1;
94 }
95 }
96
97
98 c = strchr(c, '\n');
99 if (!c)
100 break;
101 c++;
102 }
103
104 dbg("exit");
105
106 return 0;
107}
108
109#define MAX_STATUS_NAME 18
110
111static int refresh_imported_device_list(void)
112{
113 const char *attr_status;
114 char status[MAX_STATUS_NAME+1] = "status";
115 int i, ret;
116
117 for (i = 0; i < vhci_driver->ncontrollers; i++) {
118 if (i > 0)
119 snprintf(status, sizeof(status), "status.%d", i);
120
121 attr_status = udev_device_get_sysattr_value(vhci_driver->hc_device,
122 status);
123 if (!attr_status) {
124 err("udev_device_get_sysattr_value failed");
125 return -1;
126 }
127
128 dbg("controller %d", i);
129
130 ret = parse_status(attr_status);
131 if (ret != 0)
132 return ret;
133 }
134
135 return 0;
136}
137
138static int get_nports(void)
139{
140 const char *attr_nports;
141
142 attr_nports = udev_device_get_sysattr_value(vhci_driver->hc_device, "nports");
143 if (!attr_nports) {
144 err("udev_device_get_sysattr_value nports failed");
145 return -1;
146 }
147
148 return (int)strtoul(attr_nports, NULL, 10);
149}
150
151static int vhci_hcd_filter(const struct dirent *dirent)
152{
153 return strcmp(dirent->d_name, "vhci_hcd") >= 0;
154}
155
156static int get_ncontrollers(void)
157{
158 struct dirent **namelist;
159 struct udev_device *platform;
160 int n;
161
162 platform = udev_device_get_parent(vhci_driver->hc_device);
163 if (platform == NULL)
164 return -1;
165
166 n = scandir(udev_device_get_syspath(platform), &namelist, vhci_hcd_filter, NULL);
167 if (n < 0)
168 err("scandir failed");
169 else {
170 for (int i = 0; i < n; i++)
171 free(namelist[i]);
172 free(namelist);
173 }
174
175 return n;
176}
177
178
179
180
181
182
183
184
185
186
187static int read_record(int rhport, char *host, unsigned long host_len,
188 char *port, unsigned long port_len, char *busid)
189{
190 int part;
191 FILE *file;
192 char path[PATH_MAX+1];
193 char *buffer, *start, *end;
194 char delim[] = {' ', ' ', '\n'};
195 int max_len[] = {(int)host_len, (int)port_len, SYSFS_BUS_ID_SIZE};
196 size_t buffer_len = host_len + port_len + SYSFS_BUS_ID_SIZE + 4;
197
198 buffer = malloc(buffer_len);
199 if (!buffer)
200 return -1;
201
202 snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", rhport);
203
204 file = fopen(path, "r");
205 if (!file) {
206 err("fopen");
207 free(buffer);
208 return -1;
209 }
210
211 if (fgets(buffer, buffer_len, file) == NULL) {
212 err("fgets");
213 free(buffer);
214 fclose(file);
215 return -1;
216 }
217 fclose(file);
218
219
220 start = buffer;
221 for (part = 0; part < 3; part++) {
222 end = strchr(start, delim[part]);
223 if (end == NULL || (end - start) > max_len[part]) {
224 free(buffer);
225 return -1;
226 }
227 start = end + 1;
228 }
229
230 if (sscanf(buffer, "%s %s %s\n", host, port, busid) != 3) {
231 err("sscanf");
232 free(buffer);
233 return -1;
234 }
235
236 free(buffer);
237
238 return 0;
239}
240
241
242
243int usbip_vhci_driver_open(void)
244{
245 udev_context = udev_new();
246 if (!udev_context) {
247 err("udev_new failed");
248 return -1;
249 }
250
251 vhci_driver = calloc(1, sizeof(struct usbip_vhci_driver));
252
253
254 vhci_driver->hc_device =
255 udev_device_new_from_subsystem_sysname(udev_context,
256 USBIP_VHCI_BUS_TYPE,
257 USBIP_VHCI_DEVICE_NAME);
258 if (!vhci_driver->hc_device) {
259 err("udev_device_new_from_subsystem_sysname failed");
260 goto err;
261 }
262
263 vhci_driver->nports = get_nports();
264 dbg("available ports: %d", vhci_driver->nports);
265
266 if (vhci_driver->nports <= 0) {
267 err("no available ports");
268 goto err;
269 } else if (vhci_driver->nports > MAXNPORT) {
270 err("port number exceeds %d", MAXNPORT);
271 goto err;
272 }
273
274 vhci_driver->ncontrollers = get_ncontrollers();
275 dbg("available controllers: %d", vhci_driver->ncontrollers);
276
277 if (vhci_driver->ncontrollers <=0) {
278 err("no available usb controllers");
279 goto err;
280 }
281
282 if (refresh_imported_device_list())
283 goto err;
284
285 return 0;
286
287err:
288 udev_device_unref(vhci_driver->hc_device);
289
290 if (vhci_driver)
291 free(vhci_driver);
292
293 vhci_driver = NULL;
294
295 udev_unref(udev_context);
296
297 return -1;
298}
299
300
301void usbip_vhci_driver_close(void)
302{
303 if (!vhci_driver)
304 return;
305
306 udev_device_unref(vhci_driver->hc_device);
307
308 free(vhci_driver);
309
310 vhci_driver = NULL;
311
312 udev_unref(udev_context);
313}
314
315
316int usbip_vhci_refresh_device_list(void)
317{
318
319 if (refresh_imported_device_list())
320 goto err;
321
322 return 0;
323err:
324 dbg("failed to refresh device list");
325 return -1;
326}
327
328
329int usbip_vhci_get_free_port(uint32_t speed)
330{
331 for (int i = 0; i < vhci_driver->nports; i++) {
332
333 switch (speed) {
334 case USB_SPEED_SUPER:
335 if (vhci_driver->idev[i].hub != HUB_SPEED_SUPER)
336 continue;
337 break;
338 default:
339 if (vhci_driver->idev[i].hub != HUB_SPEED_HIGH)
340 continue;
341 break;
342 }
343
344 if (vhci_driver->idev[i].status == VDEV_ST_NULL)
345 return vhci_driver->idev[i].port;
346 }
347
348 return -1;
349}
350
351int usbip_vhci_attach_device2(uint8_t port, int sockfd, uint32_t devid,
352 uint32_t speed) {
353 char buff[200];
354 char attach_attr_path[SYSFS_PATH_MAX];
355 char attr_attach[] = "attach";
356 const char *path;
357 int ret;
358
359 snprintf(buff, sizeof(buff), "%u %d %u %u",
360 port, sockfd, devid, speed);
361 dbg("writing: %s", buff);
362
363 path = udev_device_get_syspath(vhci_driver->hc_device);
364 snprintf(attach_attr_path, sizeof(attach_attr_path), "%s/%s",
365 path, attr_attach);
366 dbg("attach attribute path: %s", attach_attr_path);
367
368 ret = write_sysfs_attribute(attach_attr_path, buff, strlen(buff));
369 if (ret < 0) {
370 dbg("write_sysfs_attribute failed");
371 return -1;
372 }
373
374 dbg("attached port: %d", port);
375
376 return 0;
377}
378
379static unsigned long get_devid(uint8_t busnum, uint8_t devnum)
380{
381 return (busnum << 16) | devnum;
382}
383
384
385int usbip_vhci_attach_device(uint8_t port, int sockfd, uint8_t busnum,
386 uint8_t devnum, uint32_t speed)
387{
388 int devid = get_devid(busnum, devnum);
389
390 return usbip_vhci_attach_device2(port, sockfd, devid, speed);
391}
392
393int usbip_vhci_detach_device(uint8_t port)
394{
395 char detach_attr_path[SYSFS_PATH_MAX];
396 char attr_detach[] = "detach";
397 char buff[200];
398 const char *path;
399 int ret;
400
401 snprintf(buff, sizeof(buff), "%u", port);
402 dbg("writing: %s", buff);
403
404 path = udev_device_get_syspath(vhci_driver->hc_device);
405 snprintf(detach_attr_path, sizeof(detach_attr_path), "%s/%s",
406 path, attr_detach);
407 dbg("detach attribute path: %s", detach_attr_path);
408
409 ret = write_sysfs_attribute(detach_attr_path, buff, strlen(buff));
410 if (ret < 0) {
411 dbg("write_sysfs_attribute failed");
412 return -1;
413 }
414
415 dbg("detached port: %d", port);
416
417 return 0;
418}
419
420int usbip_vhci_imported_device_dump(struct usbip_imported_device *idev)
421{
422 char product_name[100];
423 char host[NI_MAXHOST] = "unknown host";
424 char serv[NI_MAXSERV] = "unknown port";
425 char remote_busid[SYSFS_BUS_ID_SIZE];
426 int ret;
427 int read_record_error = 0;
428
429 if (idev->status == VDEV_ST_NULL || idev->status == VDEV_ST_NOTASSIGNED)
430 return 0;
431
432 ret = read_record(idev->port, host, sizeof(host), serv, sizeof(serv),
433 remote_busid);
434 if (ret) {
435 err("read_record");
436 read_record_error = 1;
437 }
438
439 printf("Port %02d: <%s> at %s\n", idev->port,
440 usbip_status_string(idev->status),
441 usbip_speed_string(idev->udev.speed));
442
443 usbip_names_get_product(product_name, sizeof(product_name),
444 idev->udev.idVendor, idev->udev.idProduct);
445
446 printf(" %s\n", product_name);
447
448 if (!read_record_error) {
449 printf("%10s -> usbip://%s:%s/%s\n", idev->udev.busid,
450 host, serv, remote_busid);
451 printf("%10s -> remote bus/dev %03d/%03d\n", " ",
452 idev->busnum, idev->devnum);
453 } else {
454 printf("%10s -> unknown host, remote port and remote busid\n",
455 idev->udev.busid);
456 printf("%10s -> remote bus/dev %03d/%03d\n", " ",
457 idev->busnum, idev->devnum);
458 }
459
460 return 0;
461}
462
