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Commit | Line | Data |
---|---|---|
d7867b31 KS |
1 | /* |
2 | * compose persistent device path | |
3 | * | |
1298001e | 4 | * Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org> |
d7867b31 KS |
5 | * |
6 | * Logic based on Hannes Reinecke's shell script. | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
d7867b31 | 22 | #include <ctype.h> |
d7867b31 | 23 | #include <dirent.h> |
07630cea LP |
24 | #include <errno.h> |
25 | #include <fcntl.h> | |
d7867b31 | 26 | #include <getopt.h> |
07630cea LP |
27 | #include <stdarg.h> |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
d7867b31 | 32 | |
b5efdb8a | 33 | #include "alloc-util.h" |
07630cea | 34 | #include "string-util.h" |
d7867b31 KS |
35 | #include "udev.h" |
36 | ||
9091e686 | 37 | _printf_(2,3) |
9ec6e95b | 38 | static int path_prepend(char **path, const char *fmt, ...) { |
912541b0 KS |
39 | va_list va; |
40 | char *pre; | |
41 | int err = 0; | |
42 | ||
43 | va_start(va, fmt); | |
44 | err = vasprintf(&pre, fmt, va); | |
45 | va_end(va); | |
46 | if (err < 0) | |
47 | goto out; | |
48 | ||
49 | if (*path != NULL) { | |
50 | char *new; | |
51 | ||
52 | err = asprintf(&new, "%s-%s", pre, *path); | |
53 | free(pre); | |
54 | if (err < 0) | |
55 | goto out; | |
56 | free(*path); | |
57 | *path = new; | |
58 | } else { | |
59 | *path = pre; | |
60 | } | |
d7867b31 | 61 | out: |
912541b0 | 62 | return err; |
d7867b31 KS |
63 | } |
64 | ||
65 | /* | |
66 | ** Linux only supports 32 bit luns. | |
67 | ** See drivers/scsi/scsi_scan.c::scsilun_to_int() for more details. | |
68 | */ | |
9ec6e95b | 69 | static int format_lun_number(struct udev_device *dev, char **path) { |
912541b0 | 70 | unsigned long lun = strtoul(udev_device_get_sysnum(dev), NULL, 10); |
d7867b31 | 71 | |
912541b0 KS |
72 | /* address method 0, peripheral device addressing with bus id of zero */ |
73 | if (lun < 256) | |
d9de321f | 74 | return path_prepend(path, "lun-%lu", lun); |
912541b0 | 75 | /* handle all other lun addressing methods by using a variant of the original lun format */ |
d9de321f | 76 | return path_prepend(path, "lun-0x%04lx%04lx00000000", lun & 0xffff, (lun >> 16) & 0xffff); |
d7867b31 KS |
77 | } |
78 | ||
9ec6e95b | 79 | static struct udev_device *skip_subsystem(struct udev_device *dev, const char *subsys) { |
912541b0 KS |
80 | struct udev_device *parent = dev; |
81 | ||
3b64e4d4 TG |
82 | assert(dev); |
83 | assert(subsys); | |
84 | ||
912541b0 KS |
85 | while (parent != NULL) { |
86 | const char *subsystem; | |
87 | ||
88 | subsystem = udev_device_get_subsystem(parent); | |
090be865 | 89 | if (subsystem == NULL || !streq(subsystem, subsys)) |
912541b0 KS |
90 | break; |
91 | dev = parent; | |
92 | parent = udev_device_get_parent(parent); | |
93 | } | |
94 | return dev; | |
d7867b31 KS |
95 | } |
96 | ||
9ec6e95b | 97 | static struct udev_device *handle_scsi_fibre_channel(struct udev_device *parent, char **path) { |
912541b0 KS |
98 | struct udev *udev = udev_device_get_udev(parent); |
99 | struct udev_device *targetdev; | |
100 | struct udev_device *fcdev = NULL; | |
101 | const char *port; | |
33b40551 | 102 | char *lun = NULL; |
912541b0 | 103 | |
3b64e4d4 TG |
104 | assert(parent); |
105 | assert(path); | |
106 | ||
912541b0 KS |
107 | targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); |
108 | if (targetdev == NULL) | |
109 | return NULL; | |
110 | ||
111 | fcdev = udev_device_new_from_subsystem_sysname(udev, "fc_transport", udev_device_get_sysname(targetdev)); | |
112 | if (fcdev == NULL) | |
113 | return NULL; | |
114 | port = udev_device_get_sysattr_value(fcdev, "port_name"); | |
115 | if (port == NULL) { | |
116 | parent = NULL; | |
117 | goto out; | |
118 | } | |
119 | ||
120 | format_lun_number(parent, &lun); | |
121 | path_prepend(path, "fc-%s-%s", port, lun); | |
dc4ebc07 | 122 | free(lun); |
d7867b31 | 123 | out: |
912541b0 KS |
124 | udev_device_unref(fcdev); |
125 | return parent; | |
d7867b31 KS |
126 | } |
127 | ||
66bba0e7 | 128 | static struct udev_device *handle_scsi_sas_wide_port(struct udev_device *parent, char **path) { |
912541b0 KS |
129 | struct udev *udev = udev_device_get_udev(parent); |
130 | struct udev_device *targetdev; | |
131 | struct udev_device *target_parent; | |
132 | struct udev_device *sasdev; | |
133 | const char *sas_address; | |
134 | char *lun = NULL; | |
135 | ||
3b64e4d4 TG |
136 | assert(parent); |
137 | assert(path); | |
138 | ||
912541b0 KS |
139 | targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); |
140 | if (targetdev == NULL) | |
141 | return NULL; | |
142 | ||
143 | target_parent = udev_device_get_parent(targetdev); | |
144 | if (target_parent == NULL) | |
145 | return NULL; | |
146 | ||
147 | sasdev = udev_device_new_from_subsystem_sysname(udev, "sas_device", | |
148 | udev_device_get_sysname(target_parent)); | |
149 | if (sasdev == NULL) | |
150 | return NULL; | |
151 | ||
152 | sas_address = udev_device_get_sysattr_value(sasdev, "sas_address"); | |
153 | if (sas_address == NULL) { | |
154 | parent = NULL; | |
155 | goto out; | |
156 | } | |
157 | ||
158 | format_lun_number(parent, &lun); | |
159 | path_prepend(path, "sas-%s-%s", sas_address, lun); | |
dc4ebc07 | 160 | free(lun); |
d7867b31 | 161 | out: |
912541b0 KS |
162 | udev_device_unref(sasdev); |
163 | return parent; | |
d7867b31 KS |
164 | } |
165 | ||
66bba0e7 ML |
166 | static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path) |
167 | { | |
168 | struct udev *udev = udev_device_get_udev(parent); | |
169 | struct udev_device *targetdev; | |
170 | struct udev_device *target_parent; | |
171 | struct udev_device *port; | |
172 | struct udev_device *expander; | |
173 | struct udev_device *target_sasdev = NULL; | |
174 | struct udev_device *expander_sasdev = NULL; | |
175 | struct udev_device *port_sasdev = NULL; | |
176 | const char *sas_address = NULL; | |
177 | const char *phy_id; | |
178 | const char *phy_count; | |
179 | char *lun = NULL; | |
180 | ||
3b64e4d4 TG |
181 | assert(parent); |
182 | assert(path); | |
183 | ||
66bba0e7 ML |
184 | targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); |
185 | if (targetdev == NULL) | |
186 | return NULL; | |
187 | ||
188 | target_parent = udev_device_get_parent(targetdev); | |
189 | if (target_parent == NULL) | |
190 | return NULL; | |
191 | ||
192 | /* Get sas device */ | |
193 | target_sasdev = udev_device_new_from_subsystem_sysname(udev, | |
194 | "sas_device", udev_device_get_sysname(target_parent)); | |
195 | if (target_sasdev == NULL) | |
196 | return NULL; | |
197 | ||
198 | /* The next parent is sas port */ | |
199 | port = udev_device_get_parent(target_parent); | |
200 | if (port == NULL) { | |
201 | parent = NULL; | |
202 | goto out; | |
203 | } | |
204 | ||
205 | /* Get port device */ | |
206 | port_sasdev = udev_device_new_from_subsystem_sysname(udev, | |
207 | "sas_port", udev_device_get_sysname(port)); | |
208 | ||
209 | phy_count = udev_device_get_sysattr_value(port_sasdev, "num_phys"); | |
210 | if (phy_count == NULL) { | |
211 | parent = NULL; | |
212 | goto out; | |
213 | } | |
214 | ||
215 | /* Check if we are simple disk */ | |
216 | if (strncmp(phy_count, "1", 2) != 0) { | |
217 | parent = handle_scsi_sas_wide_port(parent, path); | |
218 | goto out; | |
219 | } | |
220 | ||
221 | /* Get connected phy */ | |
222 | phy_id = udev_device_get_sysattr_value(target_sasdev, "phy_identifier"); | |
223 | if (phy_id == NULL) { | |
224 | parent = NULL; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | /* The port's parent is either hba or expander */ | |
229 | expander = udev_device_get_parent(port); | |
230 | if (expander == NULL) { | |
231 | parent = NULL; | |
232 | goto out; | |
233 | } | |
234 | ||
235 | /* Get expander device */ | |
236 | expander_sasdev = udev_device_new_from_subsystem_sysname(udev, | |
237 | "sas_device", udev_device_get_sysname(expander)); | |
238 | if (expander_sasdev != NULL) { | |
239 | /* Get expander's address */ | |
240 | sas_address = udev_device_get_sysattr_value(expander_sasdev, | |
241 | "sas_address"); | |
242 | if (sas_address == NULL) { | |
243 | parent = NULL; | |
244 | goto out; | |
245 | } | |
246 | } | |
247 | ||
248 | format_lun_number(parent, &lun); | |
249 | if (sas_address) | |
250 | path_prepend(path, "sas-exp%s-phy%s-%s", sas_address, phy_id, lun); | |
251 | else | |
252 | path_prepend(path, "sas-phy%s-%s", phy_id, lun); | |
253 | ||
dc4ebc07 | 254 | free(lun); |
66bba0e7 ML |
255 | out: |
256 | udev_device_unref(target_sasdev); | |
257 | udev_device_unref(expander_sasdev); | |
258 | udev_device_unref(port_sasdev); | |
259 | return parent; | |
260 | } | |
261 | ||
9ec6e95b | 262 | static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path) { |
912541b0 KS |
263 | struct udev *udev = udev_device_get_udev(parent); |
264 | struct udev_device *transportdev; | |
265 | struct udev_device *sessiondev = NULL; | |
266 | const char *target; | |
267 | char *connname; | |
268 | struct udev_device *conndev = NULL; | |
269 | const char *addr; | |
270 | const char *port; | |
271 | char *lun = NULL; | |
272 | ||
3b64e4d4 TG |
273 | assert(parent); |
274 | assert(path); | |
275 | ||
912541b0 KS |
276 | /* find iscsi session */ |
277 | transportdev = parent; | |
278 | for (;;) { | |
279 | transportdev = udev_device_get_parent(transportdev); | |
280 | if (transportdev == NULL) | |
281 | return NULL; | |
33502ffe | 282 | if (startswith(udev_device_get_sysname(transportdev), "session")) |
912541b0 KS |
283 | break; |
284 | } | |
285 | ||
286 | /* find iscsi session device */ | |
287 | sessiondev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session", udev_device_get_sysname(transportdev)); | |
288 | if (sessiondev == NULL) | |
289 | return NULL; | |
290 | target = udev_device_get_sysattr_value(sessiondev, "targetname"); | |
291 | if (target == NULL) { | |
292 | parent = NULL; | |
293 | goto out; | |
294 | } | |
295 | ||
296 | if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) { | |
297 | parent = NULL; | |
298 | goto out; | |
299 | } | |
300 | conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname); | |
301 | free(connname); | |
302 | if (conndev == NULL) { | |
303 | parent = NULL; | |
304 | goto out; | |
305 | } | |
306 | addr = udev_device_get_sysattr_value(conndev, "persistent_address"); | |
307 | port = udev_device_get_sysattr_value(conndev, "persistent_port"); | |
308 | if (addr == NULL || port == NULL) { | |
309 | parent = NULL; | |
310 | goto out; | |
311 | } | |
312 | ||
313 | format_lun_number(parent, &lun); | |
314 | path_prepend(path, "ip-%s:%s-iscsi-%s-%s", addr, port, target, lun); | |
dc4ebc07 | 315 | free(lun); |
d7867b31 | 316 | out: |
912541b0 KS |
317 | udev_device_unref(sessiondev); |
318 | udev_device_unref(conndev); | |
319 | return parent; | |
d7867b31 KS |
320 | } |
321 | ||
ba86822d DM |
322 | static struct udev_device *handle_scsi_ata(struct udev_device *parent, char **path) { |
323 | struct udev *udev = udev_device_get_udev(parent); | |
324 | struct udev_device *targetdev; | |
325 | struct udev_device *target_parent; | |
326 | struct udev_device *atadev; | |
327 | const char *port_no; | |
328 | ||
329 | assert(parent); | |
330 | assert(path); | |
331 | ||
332 | targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); | |
333 | if (!targetdev) | |
334 | return NULL; | |
335 | ||
336 | target_parent = udev_device_get_parent(targetdev); | |
337 | if (!target_parent) | |
338 | return NULL; | |
339 | ||
340 | atadev = udev_device_new_from_subsystem_sysname(udev, "ata_port", udev_device_get_sysname(target_parent)); | |
341 | if (!atadev) | |
342 | return NULL; | |
343 | ||
344 | port_no = udev_device_get_sysattr_value(atadev, "port_no"); | |
345 | if (!port_no) { | |
346 | parent = NULL; | |
347 | goto out; | |
348 | } | |
349 | path_prepend(path, "ata-%s", port_no); | |
350 | out: | |
351 | udev_device_unref(atadev); | |
352 | return parent; | |
353 | } | |
354 | ||
9ec6e95b | 355 | static struct udev_device *handle_scsi_default(struct udev_device *parent, char **path) { |
912541b0 KS |
356 | struct udev_device *hostdev; |
357 | int host, bus, target, lun; | |
358 | const char *name; | |
359 | char *base; | |
360 | char *pos; | |
361 | DIR *dir; | |
362 | struct dirent *dent; | |
363 | int basenum; | |
364 | ||
3b64e4d4 TG |
365 | assert(parent); |
366 | assert(path); | |
367 | ||
912541b0 KS |
368 | hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); |
369 | if (hostdev == NULL) | |
370 | return NULL; | |
371 | ||
372 | name = udev_device_get_sysname(parent); | |
373 | if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) | |
374 | return NULL; | |
375 | ||
1c7dfbf2 KS |
376 | /* |
377 | * Rebase host offset to get the local relative number | |
378 | * | |
379 | * Note: This is by definition racy, unreliable and too simple. | |
380 | * Please do not copy this model anywhere. It's just a left-over | |
381 | * from the time we had no idea how things should look like in | |
382 | * the end. | |
383 | * | |
384 | * Making assumptions about a global in-kernel counter and use | |
385 | * that to calculate a local offset is a very broken concept. It | |
386 | * can only work as long as things are in strict order. | |
387 | * | |
388 | * The kernel needs to export the instance/port number of a | |
389 | * controller directly, without the need for rebase magic like | |
390 | * this. Manual driver unbind/bind, parallel hotplug/unplug will | |
391 | * get into the way of this "I hope it works" logic. | |
392 | */ | |
912541b0 KS |
393 | basenum = -1; |
394 | base = strdup(udev_device_get_syspath(hostdev)); | |
395 | if (base == NULL) | |
396 | return NULL; | |
397 | pos = strrchr(base, '/'); | |
398 | if (pos == NULL) { | |
399 | parent = NULL; | |
400 | goto out; | |
401 | } | |
402 | pos[0] = '\0'; | |
403 | dir = opendir(base); | |
404 | if (dir == NULL) { | |
405 | parent = NULL; | |
406 | goto out; | |
407 | } | |
408 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
409 | char *rest; | |
410 | int i; | |
411 | ||
412 | if (dent->d_name[0] == '.') | |
413 | continue; | |
414 | if (dent->d_type != DT_DIR && dent->d_type != DT_LNK) | |
415 | continue; | |
33502ffe | 416 | if (!startswith(dent->d_name, "host")) |
912541b0 KS |
417 | continue; |
418 | i = strtoul(&dent->d_name[4], &rest, 10); | |
419 | if (rest[0] != '\0') | |
420 | continue; | |
746b5152 KS |
421 | /* |
422 | * find the smallest number; the host really needs to export its | |
423 | * own instance number per parent device; relying on the global host | |
424 | * enumeration and plainly rebasing the numbers sounds unreliable | |
425 | */ | |
912541b0 KS |
426 | if (basenum == -1 || i < basenum) |
427 | basenum = i; | |
428 | } | |
429 | closedir(dir); | |
430 | if (basenum == -1) { | |
431 | parent = NULL; | |
432 | goto out; | |
433 | } | |
434 | host -= basenum; | |
435 | ||
436 | path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun); | |
d7867b31 | 437 | out: |
912541b0 KS |
438 | free(base); |
439 | return hostdev; | |
d7867b31 KS |
440 | } |
441 | ||
a24d03b8 HR |
442 | static struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path) { |
443 | struct udev_device *hostdev; | |
444 | struct udev_device *vmbusdev; | |
445 | const char *guid_str; | |
446 | char *lun = NULL; | |
447 | char guid[38]; | |
448 | size_t i, k; | |
449 | ||
3b64e4d4 TG |
450 | assert(parent); |
451 | assert(path); | |
452 | ||
a24d03b8 HR |
453 | hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); |
454 | if (!hostdev) | |
455 | return NULL; | |
456 | ||
457 | vmbusdev = udev_device_get_parent(hostdev); | |
458 | if (!vmbusdev) | |
459 | return NULL; | |
460 | ||
461 | guid_str = udev_device_get_sysattr_value(vmbusdev, "device_id"); | |
462 | if (!guid_str) | |
463 | return NULL; | |
464 | ||
465 | if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}') | |
466 | return NULL; | |
467 | ||
468 | for (i = 1, k = 0; i < 36; i++) { | |
469 | if (guid_str[i] == '-') | |
470 | continue; | |
471 | guid[k++] = guid_str[i]; | |
472 | } | |
473 | guid[k] = '\0'; | |
474 | ||
475 | format_lun_number(parent, &lun); | |
476 | path_prepend(path, "vmbus-%s-%s", guid, lun); | |
477 | free(lun); | |
478 | return parent; | |
479 | } | |
480 | ||
cc821d02 | 481 | static struct udev_device *handle_scsi(struct udev_device *parent, char **path, bool *supported_parent) { |
912541b0 KS |
482 | const char *devtype; |
483 | const char *name; | |
484 | const char *id; | |
485 | ||
486 | devtype = udev_device_get_devtype(parent); | |
090be865 | 487 | if (devtype == NULL || !streq(devtype, "scsi_device")) |
912541b0 KS |
488 | return parent; |
489 | ||
490 | /* firewire */ | |
491 | id = udev_device_get_sysattr_value(parent, "ieee1394_id"); | |
492 | if (id != NULL) { | |
493 | parent = skip_subsystem(parent, "scsi"); | |
494 | path_prepend(path, "ieee1394-0x%s", id); | |
cc821d02 | 495 | *supported_parent = true; |
912541b0 KS |
496 | goto out; |
497 | } | |
498 | ||
59d86149 | 499 | /* scsi sysfs does not have a "subsystem" for the transport */ |
912541b0 KS |
500 | name = udev_device_get_syspath(parent); |
501 | ||
502 | if (strstr(name, "/rport-") != NULL) { | |
503 | parent = handle_scsi_fibre_channel(parent, path); | |
cc821d02 | 504 | *supported_parent = true; |
912541b0 KS |
505 | goto out; |
506 | } | |
507 | ||
508 | if (strstr(name, "/end_device-") != NULL) { | |
509 | parent = handle_scsi_sas(parent, path); | |
cc821d02 | 510 | *supported_parent = true; |
912541b0 KS |
511 | goto out; |
512 | } | |
513 | ||
514 | if (strstr(name, "/session") != NULL) { | |
515 | parent = handle_scsi_iscsi(parent, path); | |
cc821d02 | 516 | *supported_parent = true; |
912541b0 KS |
517 | goto out; |
518 | } | |
519 | ||
481dcf7c | 520 | if (strstr(name, "/ata") != NULL) { |
ba86822d | 521 | parent = handle_scsi_ata(parent, path); |
481dcf7c KS |
522 | goto out; |
523 | } | |
524 | ||
a24d03b8 HR |
525 | if (strstr(name, "/vmbus_") != NULL) { |
526 | parent = handle_scsi_hyperv(parent, path); | |
527 | goto out; | |
528 | } | |
529 | ||
912541b0 | 530 | parent = handle_scsi_default(parent, path); |
d7867b31 | 531 | out: |
912541b0 | 532 | return parent; |
d7867b31 KS |
533 | } |
534 | ||
9ec6e95b | 535 | static struct udev_device *handle_cciss(struct udev_device *parent, char **path) { |
68acb21d HR |
536 | const char *str; |
537 | unsigned int controller, disk; | |
538 | ||
539 | str = udev_device_get_sysname(parent); | |
540 | if (sscanf(str, "c%ud%u%*s", &controller, &disk) != 2) | |
541 | return NULL; | |
542 | ||
543 | path_prepend(path, "cciss-disk%u", disk); | |
544 | parent = skip_subsystem(parent, "cciss"); | |
545 | return parent; | |
546 | } | |
547 | ||
9ec6e95b | 548 | static void handle_scsi_tape(struct udev_device *dev, char **path) { |
912541b0 | 549 | const char *name; |
d7867b31 | 550 | |
912541b0 KS |
551 | /* must be the last device in the syspath */ |
552 | if (*path != NULL) | |
553 | return; | |
d7867b31 | 554 | |
912541b0 | 555 | name = udev_device_get_sysname(dev); |
33502ffe | 556 | if (startswith(name, "nst") && strchr("lma", name[3]) != NULL) |
912541b0 | 557 | path_prepend(path, "nst%c", name[3]); |
33502ffe | 558 | else if (startswith(name, "st") && strchr("lma", name[2]) != NULL) |
912541b0 | 559 | path_prepend(path, "st%c", name[2]); |
d7867b31 KS |
560 | } |
561 | ||
9ec6e95b | 562 | static struct udev_device *handle_usb(struct udev_device *parent, char **path) { |
912541b0 KS |
563 | const char *devtype; |
564 | const char *str; | |
565 | const char *port; | |
566 | ||
567 | devtype = udev_device_get_devtype(parent); | |
568 | if (devtype == NULL) | |
569 | return parent; | |
090be865 | 570 | if (!streq(devtype, "usb_interface") && !streq(devtype, "usb_device")) |
912541b0 KS |
571 | return parent; |
572 | ||
573 | str = udev_device_get_sysname(parent); | |
574 | port = strchr(str, '-'); | |
575 | if (port == NULL) | |
576 | return parent; | |
577 | port++; | |
578 | ||
579 | parent = skip_subsystem(parent, "usb"); | |
580 | path_prepend(path, "usb-0:%s", port); | |
581 | return parent; | |
d7867b31 KS |
582 | } |
583 | ||
9ec6e95b | 584 | static struct udev_device *handle_bcma(struct udev_device *parent, char **path) { |
89f17d4f TG |
585 | const char *sysname; |
586 | unsigned int core; | |
587 | ||
588 | sysname = udev_device_get_sysname(parent); | |
589 | if (sscanf(sysname, "bcma%*u:%u", &core) != 1) | |
590 | return NULL; | |
591 | ||
592 | path_prepend(path, "bcma-%u", core); | |
593 | return parent; | |
594 | } | |
595 | ||
9ec6e95b | 596 | static struct udev_device *handle_ccw(struct udev_device *parent, struct udev_device *dev, char **path) { |
912541b0 KS |
597 | struct udev_device *scsi_dev; |
598 | ||
3b64e4d4 TG |
599 | assert(parent); |
600 | assert(dev); | |
601 | assert(path); | |
602 | ||
912541b0 KS |
603 | scsi_dev = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device"); |
604 | if (scsi_dev != NULL) { | |
605 | const char *wwpn; | |
606 | const char *lun; | |
607 | const char *hba_id; | |
608 | ||
609 | hba_id = udev_device_get_sysattr_value(scsi_dev, "hba_id"); | |
610 | wwpn = udev_device_get_sysattr_value(scsi_dev, "wwpn"); | |
611 | lun = udev_device_get_sysattr_value(scsi_dev, "fcp_lun"); | |
612 | if (hba_id != NULL && lun != NULL && wwpn != NULL) { | |
613 | path_prepend(path, "ccw-%s-zfcp-%s:%s", hba_id, wwpn, lun); | |
614 | goto out; | |
615 | } | |
616 | } | |
617 | ||
618 | path_prepend(path, "ccw-%s", udev_device_get_sysname(parent)); | |
d7867b31 | 619 | out: |
912541b0 KS |
620 | parent = skip_subsystem(parent, "ccw"); |
621 | return parent; | |
d7867b31 KS |
622 | } |
623 | ||
9ec6e95b | 624 | static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool test) { |
912541b0 KS |
625 | struct udev_device *parent; |
626 | char *path = NULL; | |
e98bbfd2 KS |
627 | bool supported_transport = false; |
628 | bool supported_parent = false; | |
912541b0 | 629 | |
3b64e4d4 TG |
630 | assert(dev); |
631 | ||
912541b0 KS |
632 | /* S390 ccw bus */ |
633 | parent = udev_device_get_parent_with_subsystem_devtype(dev, "ccw", NULL); | |
634 | if (parent != NULL) { | |
635 | handle_ccw(parent, dev, &path); | |
636 | goto out; | |
637 | } | |
638 | ||
639 | /* walk up the chain of devices and compose path */ | |
640 | parent = dev; | |
641 | while (parent != NULL) { | |
642 | const char *subsys; | |
643 | ||
644 | subsys = udev_device_get_subsystem(parent); | |
645 | if (subsys == NULL) { | |
646 | ; | |
090be865 | 647 | } else if (streq(subsys, "scsi_tape")) { |
912541b0 | 648 | handle_scsi_tape(parent, &path); |
090be865 | 649 | } else if (streq(subsys, "scsi")) { |
cc821d02 | 650 | parent = handle_scsi(parent, &path, &supported_parent); |
e98bbfd2 | 651 | supported_transport = true; |
090be865 | 652 | } else if (streq(subsys, "cciss")) { |
68acb21d | 653 | parent = handle_cciss(parent, &path); |
e98bbfd2 | 654 | supported_transport = true; |
090be865 | 655 | } else if (streq(subsys, "usb")) { |
912541b0 | 656 | parent = handle_usb(parent, &path); |
e98bbfd2 | 657 | supported_transport = true; |
89f17d4f TG |
658 | } else if (streq(subsys, "bcma")) { |
659 | parent = handle_bcma(parent, &path); | |
e98bbfd2 | 660 | supported_transport = true; |
090be865 | 661 | } else if (streq(subsys, "serio")) { |
912541b0 KS |
662 | path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent)); |
663 | parent = skip_subsystem(parent, "serio"); | |
090be865 | 664 | } else if (streq(subsys, "pci")) { |
912541b0 KS |
665 | path_prepend(&path, "pci-%s", udev_device_get_sysname(parent)); |
666 | parent = skip_subsystem(parent, "pci"); | |
e98bbfd2 | 667 | supported_parent = true; |
090be865 | 668 | } else if (streq(subsys, "platform")) { |
912541b0 KS |
669 | path_prepend(&path, "platform-%s", udev_device_get_sysname(parent)); |
670 | parent = skip_subsystem(parent, "platform"); | |
e98bbfd2 KS |
671 | supported_transport = true; |
672 | supported_parent = true; | |
090be865 | 673 | } else if (streq(subsys, "acpi")) { |
912541b0 KS |
674 | path_prepend(&path, "acpi-%s", udev_device_get_sysname(parent)); |
675 | parent = skip_subsystem(parent, "acpi"); | |
e98bbfd2 | 676 | supported_parent = true; |
090be865 | 677 | } else if (streq(subsys, "xen")) { |
912541b0 KS |
678 | path_prepend(&path, "xen-%s", udev_device_get_sysname(parent)); |
679 | parent = skip_subsystem(parent, "xen"); | |
e98bbfd2 | 680 | supported_parent = true; |
090be865 | 681 | } else if (streq(subsys, "scm")) { |
4ecc1318 SO |
682 | path_prepend(&path, "scm-%s", udev_device_get_sysname(parent)); |
683 | parent = skip_subsystem(parent, "scm"); | |
e98bbfd2 KS |
684 | supported_transport = true; |
685 | supported_parent = true; | |
912541b0 KS |
686 | } |
687 | ||
28541a3d TG |
688 | if (parent) |
689 | parent = udev_device_get_parent(parent); | |
912541b0 | 690 | } |
7fdd367e KS |
691 | |
692 | /* | |
a42cdff1 KS |
693 | * Do not return devices with an unknown parent device type. They |
694 | * might produce conflicting IDs if the parent does not provide a | |
695 | * unique and predictable name. | |
7fdd367e | 696 | */ |
97b11eed DH |
697 | if (!supported_parent) |
698 | path = mfree(path); | |
e98bbfd2 KS |
699 | |
700 | /* | |
a42cdff1 KS |
701 | * Do not return block devices without a well-known transport. Some |
702 | * devices do not expose their buses and do not provide a unique | |
703 | * and predictable name that way. | |
e98bbfd2 | 704 | */ |
97b11eed DH |
705 | if (streq(udev_device_get_subsystem(dev), "block") && !supported_transport) |
706 | path = mfree(path); | |
7fdd367e | 707 | |
d7867b31 | 708 | out: |
912541b0 KS |
709 | if (path != NULL) { |
710 | char tag[UTIL_NAME_SIZE]; | |
711 | size_t i; | |
712 | const char *p; | |
713 | ||
714 | /* compose valid udev tag name */ | |
715 | for (p = path, i = 0; *p; p++) { | |
716 | if ((*p >= '0' && *p <= '9') || | |
717 | (*p >= 'A' && *p <= 'Z') || | |
718 | (*p >= 'a' && *p <= 'z') || | |
719 | *p == '-') { | |
720 | tag[i++] = *p; | |
721 | continue; | |
722 | } | |
723 | ||
724 | /* skip all leading '_' */ | |
725 | if (i == 0) | |
726 | continue; | |
727 | ||
728 | /* avoid second '_' */ | |
729 | if (tag[i-1] == '_') | |
730 | continue; | |
731 | ||
732 | tag[i++] = '_'; | |
733 | } | |
734 | /* strip trailing '_' */ | |
735 | while (i > 0 && tag[i-1] == '_') | |
736 | i--; | |
737 | tag[i] = '\0'; | |
738 | ||
739 | udev_builtin_add_property(dev, test, "ID_PATH", path); | |
740 | udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag); | |
741 | free(path); | |
742 | return EXIT_SUCCESS; | |
743 | } | |
744 | return EXIT_FAILURE; | |
d7867b31 KS |
745 | } |
746 | ||
747 | const struct udev_builtin udev_builtin_path_id = { | |
912541b0 KS |
748 | .name = "path_id", |
749 | .cmd = builtin_path_id, | |
5ac0162c | 750 | .help = "Compose persistent device path", |
912541b0 | 751 | .run_once = true, |
d7867b31 | 752 | }; |