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1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2008-2012 Kay Sievers <kay@vrfy.org> | |
5 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <ctype.h> | |
22 | #include <sys/types.h> | |
23 | #include <net/if.h> | |
24 | ||
25 | #include "util.h" | |
26 | #include "macro.h" | |
27 | #include "refcnt.h" | |
28 | #include "path-util.h" | |
29 | #include "strxcpyx.h" | |
30 | #include "fileio.h" | |
31 | #include "hashmap.h" | |
32 | #include "set.h" | |
33 | #include "strv.h" | |
34 | #include "mkdir.h" | |
35 | ||
36 | #include "sd-device.h" | |
37 | ||
38 | #include "device-util.h" | |
39 | #include "device-internal.h" | |
40 | #include "device-private.h" | |
41 | ||
42 | int device_add_property(sd_device *device, const char *key, const char *value) { | |
43 | int r; | |
44 | ||
45 | assert(device); | |
46 | assert(key); | |
47 | ||
48 | r = device_add_property_aux(device, key, value, false); | |
49 | if (r < 0) | |
50 | return r; | |
51 | ||
52 | if (key[0] != '.') { | |
53 | r = device_add_property_aux(device, key, value, true); | |
54 | if (r < 0) | |
55 | return r; | |
56 | } | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
62 | _cleanup_free_ char *key = NULL; | |
63 | char *value; | |
64 | ||
65 | assert(device); | |
66 | assert(str); | |
67 | ||
68 | key = strdup(str); | |
69 | if (!key) | |
70 | return -ENOMEM; | |
71 | ||
72 | value = strchr(key, '='); | |
73 | if (!value) | |
74 | return -EINVAL; | |
75 | ||
76 | *value = '\0'; | |
77 | ||
78 | if (isempty(++value)) | |
79 | value = NULL; | |
80 | ||
81 | return device_add_property_internal(device, key, value); | |
82 | } | |
83 | ||
84 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
85 | char *path; | |
86 | int r; | |
87 | ||
88 | assert(device); | |
89 | assert(value); | |
90 | ||
91 | switch (key) { | |
92 | case 'S': | |
93 | path = strjoina("/dev/", value); | |
94 | r = device_add_devlink(device, path); | |
95 | if (r < 0) | |
96 | return r; | |
97 | ||
98 | break; | |
99 | case 'L': | |
100 | r = safe_atoi(value, &device->devlink_priority); | |
101 | if (r < 0) | |
102 | return r; | |
103 | ||
104 | break; | |
105 | case 'E': | |
106 | r = device_add_property_internal_from_string(device, value); | |
107 | if (r < 0) | |
108 | return r; | |
109 | ||
110 | break; | |
111 | case 'G': | |
112 | r = device_add_tag(device, value); | |
113 | if (r < 0) | |
114 | return r; | |
115 | ||
116 | break; | |
117 | case 'W': | |
118 | r = safe_atoi(value, &device->watch_handle); | |
119 | if (r < 0) | |
120 | return r; | |
121 | ||
122 | break; | |
123 | case 'I': | |
124 | r = device_set_usec_initialized(device, value); | |
125 | if (r < 0) | |
126 | return r; | |
127 | ||
128 | break; | |
129 | default: | |
130 | log_debug("device db: unknown key '%c'", key); | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | void device_set_devlink_priority(sd_device *device, int priority) { | |
137 | assert(device); | |
138 | ||
139 | device->devlink_priority = priority; | |
140 | } | |
141 | ||
142 | void device_set_is_initialized(sd_device *device) { | |
143 | assert(device); | |
144 | ||
145 | device->is_initialized = true; | |
146 | } | |
147 | ||
148 | int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { | |
149 | char num[DECIMAL_STR_MAX(usec_t)]; | |
150 | usec_t usec_initialized; | |
151 | int r; | |
152 | ||
153 | assert(device); | |
154 | ||
155 | if (device_old && device_old->usec_initialized > 0) | |
156 | usec_initialized = device_old->usec_initialized; | |
157 | else | |
158 | usec_initialized = now(CLOCK_MONOTONIC); | |
159 | ||
160 | r = snprintf(num, sizeof(num), USEC_FMT, usec_initialized); | |
161 | if (r < 0) | |
162 | return -errno; | |
163 | ||
164 | r = device_set_usec_initialized(device, num); | |
165 | if (r < 0) | |
166 | return r; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int device_read_db(sd_device *device) { | |
172 | _cleanup_free_ char *db = NULL; | |
173 | char *path; | |
174 | const char *id, *value; | |
175 | char key; | |
176 | size_t db_len; | |
177 | unsigned i; | |
178 | int r; | |
179 | ||
180 | enum { | |
181 | PRE_KEY, | |
182 | KEY, | |
183 | PRE_VALUE, | |
184 | VALUE, | |
185 | INVALID_LINE, | |
186 | } state = PRE_KEY; | |
187 | ||
188 | assert(device); | |
189 | ||
190 | if (device->db_loaded || device->sealed) | |
191 | return 0; | |
192 | ||
193 | r = device_get_id_filename(device, &id); | |
194 | if (r < 0) | |
195 | return r; | |
196 | ||
197 | path = strjoina("/run/udev/data/", id); | |
198 | ||
199 | r = read_full_file(path, &db, &db_len); | |
200 | if (r < 0) { | |
201 | if (r == -ENOENT) | |
202 | return 0; | |
203 | else { | |
204 | log_debug("sd-device: failed to read db '%s': %s", path, strerror(-r)); | |
205 | return r; | |
206 | } | |
207 | } | |
208 | ||
209 | /* devices with a database entry are initialized */ | |
210 | device_set_is_initialized(device); | |
211 | ||
212 | for (i = 0; i < db_len; i++) { | |
213 | switch (state) { | |
214 | case PRE_KEY: | |
215 | if (!strchr(NEWLINE, db[i])) { | |
216 | key = db[i]; | |
217 | ||
218 | state = KEY; | |
219 | } | |
220 | ||
221 | break; | |
222 | case KEY: | |
223 | if (db[i] != ':') { | |
224 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
225 | ||
226 | state = INVALID_LINE; | |
227 | } else { | |
228 | db[i] = '\0'; | |
229 | ||
230 | state = PRE_VALUE; | |
231 | } | |
232 | ||
233 | break; | |
234 | case PRE_VALUE: | |
235 | value = &db[i]; | |
236 | ||
237 | state = VALUE; | |
238 | ||
239 | break; | |
240 | case INVALID_LINE: | |
241 | if (strchr(NEWLINE, db[i])) | |
242 | state = PRE_KEY; | |
243 | ||
244 | break; | |
245 | case VALUE: | |
246 | if (strchr(NEWLINE, db[i])) { | |
247 | db[i] = '\0'; | |
248 | r = handle_db_line(device, key, value); | |
249 | if (r < 0) | |
250 | log_debug("sd-device: failed to handle db entry '%c:%s': %s", key, value, strerror(-r)); | |
251 | ||
252 | state = PRE_KEY; | |
253 | } | |
254 | ||
255 | break; | |
256 | default: | |
257 | assert_not_reached("invalid state when parsing db"); | |
258 | } | |
259 | } | |
260 | ||
261 | device->db_loaded = true; | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | uint64_t device_get_properties_generation(sd_device *device) { | |
267 | assert(device); | |
268 | ||
269 | return device->properties_generation; | |
270 | } | |
271 | ||
272 | uint64_t device_get_tags_generation(sd_device *device) { | |
273 | assert(device); | |
274 | ||
275 | return device->tags_generation; | |
276 | } | |
277 | ||
278 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
279 | assert(device); | |
280 | ||
281 | return device->devlinks_generation; | |
282 | } | |
283 | ||
284 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
285 | int r; | |
286 | ||
287 | assert(device); | |
288 | assert(mode); | |
289 | ||
290 | r = device_read_db(device); | |
291 | if (r < 0) | |
292 | return r; | |
293 | ||
294 | *mode = device->devmode; | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
300 | int r; | |
301 | ||
302 | assert(device); | |
303 | assert(uid); | |
304 | ||
305 | r = device_read_db(device); | |
306 | if (r < 0) | |
307 | return r; | |
308 | ||
309 | *uid = device->devuid; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static int device_set_devuid(sd_device *device, const char *uid) { | |
315 | unsigned u; | |
316 | int r; | |
317 | ||
318 | assert(device); | |
319 | assert(uid); | |
320 | ||
321 | r = safe_atou(uid, &u); | |
322 | if (r < 0) | |
323 | return r; | |
324 | ||
325 | r = device_add_property_internal(device, "DEVUID", uid); | |
326 | if (r < 0) | |
327 | return r; | |
328 | ||
329 | device->devuid = u; | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
335 | int r; | |
336 | ||
337 | assert(device); | |
338 | assert(gid); | |
339 | ||
340 | r = device_read_db(device); | |
341 | if (r < 0) | |
342 | return r; | |
343 | ||
344 | *gid = device->devgid; | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static int device_set_devgid(sd_device *device, const char *gid) { | |
350 | unsigned g; | |
351 | int r; | |
352 | ||
353 | assert(device); | |
354 | assert(gid); | |
355 | ||
356 | r = safe_atou(gid, &g); | |
357 | if (r < 0) | |
358 | return r; | |
359 | ||
360 | r = device_add_property_internal(device, "DEVGID", gid); | |
361 | if (r < 0) | |
362 | return r; | |
363 | ||
364 | device->devgid = g; | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
401cb614 | 369 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
370 | int r; |
371 | ||
372 | assert(device); | |
373 | assert(key); | |
374 | assert(value); | |
375 | ||
376 | if (streq(key, "DEVPATH")) { | |
377 | char *path; | |
378 | ||
379 | path = strjoina("/sys", value); | |
380 | ||
381 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
382 | r = device_set_syspath(device, path, false); | |
383 | if (r < 0) | |
384 | return log_debug_errno(r, "sd-device: could not set syspath to '%s': %m", path); | |
385 | } else if (streq(key, "SUBSYSTEM")) { | |
386 | r = device_set_subsystem(device, value); | |
387 | if (r < 0) | |
388 | return log_debug_errno(r, "sd-device: could not set subsystem to '%s': %m", value); | |
389 | } else if (streq(key, "DEVTYPE")) { | |
390 | r = device_set_devtype(device, value); | |
391 | if (r < 0) | |
392 | return log_debug_errno(r, "sd-device: could not set devtype to '%s': %m", value); | |
393 | } else if (streq(key, "DEVNAME")) { | |
394 | r = device_set_devname(device, value); | |
395 | if (r < 0) | |
396 | return log_debug_errno(r, "sd-device: could not set devname to '%s': %m", value); | |
397 | } else if (streq(key, "USEC_INITIALIZED")) { | |
398 | r = device_set_usec_initialized(device, value); | |
399 | if (r < 0) | |
400 | return log_debug_errno(r, "sd-device: could not set usec-initialized to '%s': %m", value); | |
401 | } else if (streq(key, "DRIVER")) { | |
402 | r = device_set_driver(device, value); | |
403 | if (r < 0) | |
404 | return log_debug_errno(r, "sd-device: could not set driver to '%s': %m", value); | |
405 | } else if (streq(key, "IFINDEX")) { | |
406 | r = device_set_ifindex(device, value); | |
407 | if (r < 0) | |
408 | return log_debug_errno(r, "sd-device: could not set ifindex to '%s': %m", value); | |
409 | } else if (streq(key, "DEVMODE")) { | |
410 | r = device_set_devmode(device, value); | |
411 | if (r < 0) | |
412 | return log_debug_errno(r, "sd-device: could not set devmode to '%s': %m", value); | |
413 | } else if (streq(key, "DEVUID")) { | |
414 | r = device_set_devuid(device, value); | |
415 | if (r < 0) | |
416 | return log_debug_errno(r, "sd-device: could not set devuid to '%s': %m", value); | |
417 | } else if (streq(key, "DEVGID")) { | |
418 | r = device_set_devgid(device, value); | |
419 | if (r < 0) | |
420 | return log_debug_errno(r, "sd-device: could not set devgid to '%s': %m", value); | |
421 | } else if (streq(key, "DEVLINKS")) { | |
4df4fd11 TG |
422 | const char *word, *state; |
423 | size_t l; | |
57fa1d09 | 424 | |
4df4fd11 TG |
425 | FOREACH_WORD(word, l, value, state) { |
426 | char *devlink; | |
57fa1d09 | 427 | |
4df4fd11 | 428 | devlink = strndupa(word, l); |
57fa1d09 | 429 | |
4df4fd11 | 430 | r = device_add_devlink(device, devlink); |
57fa1d09 | 431 | if (r < 0) |
4df4fd11 | 432 | return log_debug_errno(r, "sd-device: could not add devlink '%s': %m", devlink); |
57fa1d09 TG |
433 | } |
434 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
435 | const char *word, *state; |
436 | size_t l; | |
57fa1d09 | 437 | |
4df4fd11 TG |
438 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
439 | char *tag; | |
57fa1d09 | 440 | |
4df4fd11 | 441 | tag = strndupa(word, l); |
57fa1d09 | 442 | |
4df4fd11 | 443 | r = device_add_tag(device, tag); |
57fa1d09 | 444 | if (r < 0) |
4df4fd11 | 445 | return log_debug_errno(r, "sd-device: could not add tag '%s': %m", tag); |
57fa1d09 TG |
446 | } |
447 | } else { | |
448 | r = device_add_property_internal(device, key, value); | |
449 | if (r < 0) | |
450 | return log_debug_errno(r, "sd-device: could not add property '%s=%s': %m", key, value); | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | static const char* const device_action_table[_DEVICE_ACTION_MAX] = { | |
457 | [DEVICE_ACTION_ADD] = "add", | |
458 | [DEVICE_ACTION_REMOVE] = "remove", | |
459 | [DEVICE_ACTION_CHANGE] = "change", | |
460 | [DEVICE_ACTION_MOVE] = "move", | |
461 | [DEVICE_ACTION_ONLINE] = "online", | |
462 | [DEVICE_ACTION_OFFLINE] = "offline", | |
463 | }; | |
464 | ||
465 | DEFINE_STRING_TABLE_LOOKUP(device_action, DeviceAction); | |
466 | ||
467 | static int device_append(sd_device *device, char *key, const char **_major, const char **_minor, uint64_t *_seqnum, | |
468 | DeviceAction *_action) { | |
469 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
470 | uint64_t seqnum = 0; | |
471 | const char *major = NULL, *minor = NULL; | |
472 | char *value; | |
473 | int r; | |
474 | ||
475 | assert(device); | |
476 | assert(key); | |
477 | assert(_major); | |
478 | assert(_minor); | |
479 | assert(_seqnum); | |
480 | assert(_action); | |
481 | ||
482 | value = strchr(key, '='); | |
483 | if (!value) { | |
484 | log_debug("sd-device: not a key-value pair: '%s'", key); | |
485 | return -EINVAL; | |
486 | } | |
487 | ||
488 | *value = '\0'; | |
489 | ||
490 | value++; | |
491 | ||
492 | if (streq(key, "MAJOR")) | |
493 | major = value; | |
494 | else if (streq(key, "MINOR")) | |
495 | minor = value; | |
496 | else { | |
497 | if (streq(key, "ACTION")) { | |
498 | action = device_action_from_string(value); | |
499 | if (action == _DEVICE_ACTION_INVALID) | |
500 | return -EINVAL; | |
501 | } else if (streq(key, "SEQNUM")) { | |
502 | r = safe_atou64(value, &seqnum); | |
503 | if (r < 0) | |
504 | return r; | |
505 | else if (seqnum == 0) | |
506 | /* kernel only sends seqnum > 0 */ | |
507 | return -EINVAL; | |
508 | } | |
509 | ||
401cb614 | 510 | r = device_amend(device, key, value); |
57fa1d09 TG |
511 | if (r < 0) |
512 | return r; | |
513 | } | |
514 | ||
515 | if (major != 0) | |
516 | *_major = major; | |
517 | ||
518 | if (minor != 0) | |
519 | *_minor = minor; | |
520 | ||
521 | if (action != _DEVICE_ACTION_INVALID) | |
522 | *_action = action; | |
523 | ||
524 | if (seqnum > 0) | |
525 | *_seqnum = seqnum; | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | void device_seal(sd_device *device) { | |
531 | assert(device); | |
532 | ||
533 | device->sealed = true; | |
534 | } | |
535 | ||
536 | static int device_verify(sd_device *device, DeviceAction action, uint64_t seqnum) { | |
537 | assert(device); | |
538 | ||
539 | if (!device->devpath || !device->subsystem || action == _DEVICE_ACTION_INVALID || seqnum == 0) { | |
540 | log_debug("sd-device: device created from strv lacks devpath, subsystem, action or seqnum"); | |
541 | return -EINVAL; | |
542 | } | |
543 | ||
544 | device->sealed = true; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | int device_new_from_strv(sd_device **ret, char **strv) { | |
550 | _cleanup_device_unref_ sd_device *device = NULL; | |
551 | char **key; | |
552 | const char *major = NULL, *minor = NULL; | |
553 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
554 | uint64_t seqnum; | |
555 | int r; | |
556 | ||
557 | assert(ret); | |
558 | assert(strv); | |
559 | ||
560 | r = device_new_aux(&device); | |
561 | if (r < 0) | |
562 | return r; | |
563 | ||
564 | STRV_FOREACH(key, strv) { | |
565 | r = device_append(device, *key, &major, &minor, &seqnum, &action); | |
566 | if (r < 0) | |
567 | return r; | |
568 | } | |
569 | ||
570 | if (major) { | |
571 | r = device_set_devnum(device, major, minor); | |
572 | if (r < 0) | |
573 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
574 | } | |
575 | ||
576 | r = device_verify(device, action, seqnum); | |
577 | if (r < 0) | |
578 | return r; | |
579 | ||
580 | *ret = device; | |
581 | device = NULL; | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { | |
587 | _cleanup_device_unref_ sd_device *device = NULL; | |
588 | const char *major = NULL, *minor = NULL; | |
589 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
590 | uint64_t seqnum; | |
591 | unsigned i = 0; | |
592 | int r; | |
593 | ||
594 | assert(ret); | |
595 | assert(nulstr); | |
596 | assert(len); | |
597 | ||
598 | r = device_new_aux(&device); | |
599 | if (r < 0) | |
600 | return r; | |
601 | ||
602 | while (i < len) { | |
603 | char *key; | |
604 | const char *end; | |
605 | ||
606 | key = (char*)&nulstr[i]; | |
607 | end = memchr(key, '\0', len - i); | |
608 | if (!end) { | |
609 | log_debug("sd-device: failed to parse nulstr"); | |
610 | return -EINVAL; | |
611 | } | |
612 | i += end - key + 1; | |
613 | ||
614 | r = device_append(device, key, &major, &minor, &seqnum, &action); | |
615 | if (r < 0) | |
616 | return r; | |
617 | } | |
618 | ||
619 | if (major) { | |
620 | r = device_set_devnum(device, major, minor); | |
621 | if (r < 0) | |
622 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
623 | } | |
624 | ||
625 | r = device_verify(device, action, seqnum); | |
626 | if (r < 0) | |
627 | return r; | |
628 | ||
629 | *ret = device; | |
630 | device = NULL; | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | static int device_update_properties_bufs(sd_device *device) { | |
636 | const char *val, *prop; | |
637 | char **buf_strv = NULL; | |
638 | uint8_t *buf_nulstr = NULL; | |
639 | size_t allocated_nulstr = 0, allocated_strv = 0; | |
640 | size_t nulstr_len = 0, strv_size = 0; | |
641 | ||
642 | assert(device); | |
643 | ||
aa20f49a TG |
644 | if (!device->properties_buf_outdated) |
645 | return 0; | |
646 | ||
57fa1d09 TG |
647 | FOREACH_DEVICE_PROPERTY(device, prop, val) { |
648 | size_t len = 0; | |
649 | ||
650 | len = strlen(prop) + 1 + strlen(val); | |
651 | ||
652 | buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); | |
653 | if (!buf_nulstr) | |
654 | return -ENOMEM; | |
655 | ||
656 | buf_strv = GREEDY_REALLOC0(buf_strv, allocated_strv, strv_size + 2); | |
657 | if (!buf_strv) | |
658 | return -ENOMEM; | |
659 | ||
660 | buf_strv[++ strv_size] = (char *)&buf_nulstr[nulstr_len]; | |
661 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); | |
662 | nulstr_len += len + 1; | |
663 | } | |
664 | ||
665 | free(device->properties_nulstr); | |
666 | free(device->properties_strv); | |
667 | device->properties_nulstr = buf_nulstr; | |
668 | device->properties_nulstr_len = nulstr_len; | |
669 | device->properties_strv = buf_strv; | |
670 | ||
671 | device->properties_buf_outdated = false; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
677 | int r; | |
678 | ||
679 | assert(device); | |
680 | assert(nulstr); | |
681 | assert(len); | |
682 | ||
aa20f49a TG |
683 | r = device_update_properties_bufs(device); |
684 | if (r < 0) | |
685 | return r; | |
57fa1d09 TG |
686 | |
687 | *nulstr = device->properties_nulstr; | |
688 | *len = device->properties_nulstr_len; | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
694 | int r; | |
695 | ||
696 | assert(device); | |
697 | assert(strv); | |
698 | ||
699 | r = device_update_properties_bufs(device); | |
700 | if (r < 0) | |
701 | return r; | |
702 | ||
703 | *strv = device->properties_strv; | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
709 | int r; | |
710 | ||
711 | assert(device); | |
712 | assert(priority); | |
713 | ||
714 | r = device_read_db(device); | |
715 | if (r < 0) | |
716 | return r; | |
717 | ||
718 | *priority = device->devlink_priority; | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | int device_get_watch_handle(sd_device *device, int *handle) { | |
724 | int r; | |
725 | ||
726 | assert(device); | |
727 | assert(handle); | |
728 | ||
729 | r = device_read_db(device); | |
730 | if (r < 0) | |
731 | return r; | |
732 | ||
733 | *handle = device->watch_handle; | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | void device_set_watch_handle(sd_device *device, int handle) { | |
739 | assert(device); | |
740 | ||
741 | device->watch_handle = handle; | |
742 | } | |
743 | ||
744 | int device_rename(sd_device *device, const char *name) { | |
745 | _cleanup_free_ char *dirname = NULL; | |
746 | char *new_syspath; | |
747 | const char *interface; | |
748 | int r; | |
749 | ||
750 | assert(device); | |
751 | assert(name); | |
752 | ||
753 | dirname = dirname_malloc(device->syspath); | |
754 | if (!dirname) | |
755 | return -ENOMEM; | |
756 | ||
757 | new_syspath = strjoina(dirname, "/", name); | |
758 | ||
759 | /* the user must trust that the new name is correct */ | |
760 | r = device_set_syspath(device, new_syspath, false); | |
761 | if (r < 0) | |
762 | return r; | |
763 | ||
764 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
765 | if (r >= 0) { | |
766 | r = device_add_property_internal(device, "INTERFACE", name); | |
767 | if (r < 0) | |
768 | return r; | |
769 | ||
770 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ | |
771 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
772 | if (r < 0) | |
773 | return r; | |
774 | } else if (r != -ENOENT) | |
775 | return r; | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
781 | _cleanup_device_unref_ sd_device *ret = NULL; | |
782 | int r; | |
783 | ||
784 | assert(old_device); | |
785 | assert(new_device); | |
786 | ||
787 | r = device_new_aux(&ret); | |
788 | if (r < 0) | |
789 | return r; | |
790 | ||
791 | r = device_set_syspath(ret, old_device->syspath, false); | |
792 | if (r < 0) | |
793 | return r; | |
794 | ||
795 | r = device_set_subsystem(ret, old_device->subsystem); | |
796 | if (r < 0) | |
797 | return r; | |
798 | ||
799 | ret->devnum = old_device->devnum; | |
800 | ||
801 | *new_device = ret; | |
802 | ret = NULL; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
808 | _cleanup_device_unref_ sd_device *ret = NULL; | |
809 | int r; | |
810 | ||
811 | assert(old_device); | |
812 | assert(new_device); | |
813 | ||
814 | r = device_shallow_clone(old_device, &ret); | |
815 | if (r < 0) | |
816 | return r; | |
817 | ||
818 | r = device_read_db(ret); | |
819 | if (r < 0) | |
820 | return r; | |
821 | ||
822 | ret->sealed = true; | |
823 | ||
824 | *new_device = ret; | |
825 | ret = NULL; | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
831 | _cleanup_device_unref_ sd_device *ret = NULL; | |
832 | int r; | |
833 | ||
834 | assert(new_device); | |
835 | assert(syspath); | |
836 | assert(action); | |
837 | ||
838 | r = sd_device_new_from_syspath(&ret, syspath); | |
839 | if (r < 0) | |
840 | return r; | |
841 | ||
842 | r = device_read_uevent_file(ret); | |
843 | if (r < 0) | |
844 | return r; | |
845 | ||
846 | r = device_add_property_internal(ret, "ACTION", action); | |
847 | if (r < 0) | |
848 | return r; | |
849 | ||
850 | *new_device = ret; | |
851 | ret = NULL; | |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
856 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { | |
857 | const char *property, *value; | |
858 | int r; | |
859 | ||
860 | assert(device_dst); | |
861 | assert(device_src); | |
862 | ||
863 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
864 | r = device_add_property(device_dst, property, value); | |
865 | if (r < 0) | |
866 | return r; | |
867 | } | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | void device_cleanup_tags(sd_device *device) { | |
873 | assert(device); | |
874 | ||
875 | set_free_free(device->tags); | |
876 | device->tags = NULL; | |
877 | device->property_tags_outdated = true; | |
878 | device->tags_generation ++; | |
879 | } | |
880 | ||
881 | void device_cleanup_devlinks(sd_device *device) { | |
882 | assert(device); | |
883 | ||
884 | set_free_free(device->devlinks); | |
885 | device->devlinks = NULL; | |
886 | device->property_devlinks_outdated = true; | |
887 | device->devlinks_generation ++; | |
888 | } | |
889 | ||
890 | void device_remove_tag(sd_device *device, const char *tag) { | |
891 | assert(device); | |
892 | assert(tag); | |
893 | ||
894 | free(set_remove(device->tags, tag)); | |
895 | device->property_tags_outdated = true; | |
896 | device->tags_generation ++; | |
897 | } | |
898 | ||
899 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
900 | const char *id; | |
901 | char *path; | |
902 | int r; | |
903 | ||
904 | assert(device); | |
905 | assert(tag); | |
906 | ||
907 | r = device_get_id_filename(device, &id); | |
908 | if (r < 0) | |
909 | return r; | |
910 | ||
911 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
912 | ||
913 | if (add) { | |
914 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
915 | if (r < 0) | |
916 | return r; | |
917 | } else { | |
918 | r = unlink(path); | |
919 | if (r < 0 && errno != ENOENT) | |
920 | return -errno; | |
921 | } | |
922 | ||
923 | return 0; | |
924 | } | |
925 | ||
926 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
927 | const char *tag; | |
928 | int r = 0, k; | |
929 | ||
930 | if (add && device_old) { | |
931 | /* delete possible left-over tags */ | |
932 | FOREACH_DEVICE_TAG(device_old, tag) { | |
933 | if (!sd_device_has_tag(device, tag)) { | |
934 | k = device_tag(device_old, tag, false); | |
935 | if (r >= 0 && k < 0) | |
936 | r = k; | |
937 | } | |
938 | } | |
939 | } | |
940 | ||
941 | FOREACH_DEVICE_TAG(device, tag) { | |
942 | k = device_tag(device, tag, add); | |
943 | if (r >= 0 && k < 0) | |
944 | r = k; | |
945 | } | |
946 | ||
947 | return r; | |
948 | } | |
949 | ||
950 | static bool device_has_info(sd_device *device) { | |
951 | assert(device); | |
952 | ||
953 | if (!set_isempty(device->devlinks)) | |
954 | return true; | |
955 | ||
956 | if (device->devlink_priority != 0) | |
957 | return true; | |
958 | ||
959 | if (!ordered_hashmap_isempty(device->properties_db)) | |
960 | return true; | |
961 | ||
962 | if (!set_isempty(device->tags)) | |
963 | return true; | |
964 | ||
965 | if (device->watch_handle >= 0) | |
966 | return true; | |
967 | ||
968 | return false; | |
969 | } | |
970 | ||
971 | void device_set_db_persist(sd_device *device) { | |
972 | assert(device); | |
973 | ||
974 | device->db_persist = true; | |
975 | } | |
976 | ||
977 | int device_update_db(sd_device *device) { | |
978 | const char *id; | |
979 | char *path; | |
980 | _cleanup_fclose_ FILE *f = NULL; | |
981 | _cleanup_free_ char *path_tmp = NULL; | |
982 | bool has_info; | |
983 | int r; | |
984 | ||
985 | assert(device); | |
986 | ||
987 | has_info = device_has_info(device); | |
988 | ||
989 | r = device_get_id_filename(device, &id); | |
990 | if (r < 0) | |
991 | return r; | |
992 | ||
993 | path = strjoina("/run/udev/data/", id); | |
994 | ||
995 | /* do not store anything for otherwise empty devices */ | |
996 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
997 | r = unlink(path); | |
998 | if (r < 0 && errno != ENOENT) | |
999 | return -errno; | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /* write a database file */ | |
1005 | r = mkdir_parents(path, 0755); | |
1006 | if (r < 0) | |
1007 | return r; | |
1008 | ||
1009 | r = fopen_temporary(path, &f, &path_tmp); | |
1010 | if (r < 0) | |
1011 | return r; | |
1012 | ||
1013 | /* | |
1014 | * set 'sticky' bit to indicate that we should not clean the | |
1015 | * database when we transition from initramfs to the real root | |
1016 | */ | |
1017 | if (device->db_persist) { | |
1018 | r = fchmod(fileno(f), 01644); | |
1019 | if (r < 0) { | |
1020 | r = -errno; | |
1021 | goto fail; | |
1022 | } | |
1023 | } else { | |
1024 | r = fchmod(fileno(f), 0644); | |
1025 | if (r < 0) { | |
1026 | r = -errno; | |
1027 | goto fail; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | if (has_info) { | |
1032 | const char *property, *value, *tag; | |
1033 | Iterator i; | |
1034 | ||
1035 | if (major(device->devnum) > 0) { | |
1036 | const char *devlink; | |
1037 | ||
1038 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
1039 | fprintf(f, "S:%s\n", devlink + strlen("/dev/")); | |
1040 | ||
1041 | if (device->devlink_priority != 0) | |
1042 | fprintf(f, "L:%i\n", device->devlink_priority); | |
1043 | ||
1044 | if (device->watch_handle >= 0) | |
1045 | fprintf(f, "W:%i\n", device->watch_handle); | |
1046 | } | |
1047 | ||
1048 | if (device->usec_initialized > 0) | |
1049 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
1050 | ||
1051 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
1052 | fprintf(f, "E:%s=%s\n", property, value); | |
1053 | ||
1054 | FOREACH_DEVICE_TAG(device, tag) | |
1055 | fprintf(f, "G:%s\n", tag); | |
1056 | } | |
1057 | ||
1058 | r = fflush_and_check(f); | |
1059 | if (r < 0) | |
1060 | goto fail; | |
1061 | ||
1062 | r = rename(path_tmp, path); | |
1063 | if (r < 0) { | |
1064 | r = -errno; | |
1065 | goto fail; | |
1066 | } | |
1067 | ||
1068 | log_debug("created %s file '%s' for '%s'", has_info ? "db" : "empty", | |
1069 | path, device->devpath); | |
1070 | ||
1071 | return 0; | |
1072 | ||
1073 | fail: | |
1074 | log_error_errno(r, "failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", | |
1075 | path, device->devpath); | |
1076 | unlink(path); | |
1077 | unlink(path_tmp); | |
1078 | ||
1079 | return r; | |
1080 | } | |
1081 | ||
1082 | int device_delete_db(sd_device *device) { | |
1083 | const char *id; | |
1084 | char *path; | |
1085 | int r; | |
1086 | ||
1087 | assert(device); | |
1088 | ||
1089 | r = device_get_id_filename(device, &id); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | path = strjoina("/run/udev/data/", id); | |
1094 | ||
1095 | r = unlink(path); | |
1096 | if (r < 0 && errno != ENOENT) | |
1097 | return -errno; | |
1098 | ||
1099 | return 0; | |
1100 | } |