]>
Commit | Line | Data |
---|---|---|
57fa1d09 TG |
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> | |
57fa1d09 | 22 | #include <net/if.h> |
07630cea | 23 | #include <sys/types.h> |
57fa1d09 TG |
24 | |
25 | #include "sd-device.h" | |
26 | ||
57fa1d09 TG |
27 | #include "device-internal.h" |
28 | #include "device-private.h" | |
07630cea LP |
29 | #include "device-util.h" |
30 | #include "fileio.h" | |
31 | #include "hashmap.h" | |
32 | #include "macro.h" | |
33 | #include "mkdir.h" | |
34 | #include "path-util.h" | |
35 | #include "refcnt.h" | |
36 | #include "set.h" | |
37 | #include "string-util.h" | |
38 | #include "strv.h" | |
39 | #include "strxcpyx.h" | |
40 | #include "util.h" | |
57fa1d09 TG |
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; | |
e53fc357 LP |
203 | else |
204 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
205 | } |
206 | ||
207 | /* devices with a database entry are initialized */ | |
208 | device_set_is_initialized(device); | |
209 | ||
210 | for (i = 0; i < db_len; i++) { | |
211 | switch (state) { | |
212 | case PRE_KEY: | |
213 | if (!strchr(NEWLINE, db[i])) { | |
214 | key = db[i]; | |
215 | ||
216 | state = KEY; | |
217 | } | |
218 | ||
219 | break; | |
220 | case KEY: | |
221 | if (db[i] != ':') { | |
222 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
223 | ||
224 | state = INVALID_LINE; | |
225 | } else { | |
226 | db[i] = '\0'; | |
227 | ||
228 | state = PRE_VALUE; | |
229 | } | |
230 | ||
231 | break; | |
232 | case PRE_VALUE: | |
233 | value = &db[i]; | |
234 | ||
235 | state = VALUE; | |
236 | ||
237 | break; | |
238 | case INVALID_LINE: | |
239 | if (strchr(NEWLINE, db[i])) | |
240 | state = PRE_KEY; | |
241 | ||
242 | break; | |
243 | case VALUE: | |
244 | if (strchr(NEWLINE, db[i])) { | |
245 | db[i] = '\0'; | |
246 | r = handle_db_line(device, key, value); | |
247 | if (r < 0) | |
e53fc357 | 248 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
249 | |
250 | state = PRE_KEY; | |
251 | } | |
252 | ||
253 | break; | |
254 | default: | |
255 | assert_not_reached("invalid state when parsing db"); | |
256 | } | |
257 | } | |
258 | ||
259 | device->db_loaded = true; | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | uint64_t device_get_properties_generation(sd_device *device) { | |
265 | assert(device); | |
266 | ||
267 | return device->properties_generation; | |
268 | } | |
269 | ||
270 | uint64_t device_get_tags_generation(sd_device *device) { | |
271 | assert(device); | |
272 | ||
273 | return device->tags_generation; | |
274 | } | |
275 | ||
276 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
277 | assert(device); | |
278 | ||
279 | return device->devlinks_generation; | |
280 | } | |
281 | ||
282 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
283 | int r; | |
284 | ||
285 | assert(device); | |
286 | assert(mode); | |
287 | ||
288 | r = device_read_db(device); | |
289 | if (r < 0) | |
290 | return r; | |
291 | ||
292 | *mode = device->devmode; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
298 | int r; | |
299 | ||
300 | assert(device); | |
301 | assert(uid); | |
302 | ||
303 | r = device_read_db(device); | |
304 | if (r < 0) | |
305 | return r; | |
306 | ||
307 | *uid = device->devuid; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int device_set_devuid(sd_device *device, const char *uid) { | |
313 | unsigned u; | |
314 | int r; | |
315 | ||
316 | assert(device); | |
317 | assert(uid); | |
318 | ||
319 | r = safe_atou(uid, &u); | |
320 | if (r < 0) | |
321 | return r; | |
322 | ||
323 | r = device_add_property_internal(device, "DEVUID", uid); | |
324 | if (r < 0) | |
325 | return r; | |
326 | ||
327 | device->devuid = u; | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
333 | int r; | |
334 | ||
335 | assert(device); | |
336 | assert(gid); | |
337 | ||
338 | r = device_read_db(device); | |
339 | if (r < 0) | |
340 | return r; | |
341 | ||
342 | *gid = device->devgid; | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int device_set_devgid(sd_device *device, const char *gid) { | |
348 | unsigned g; | |
349 | int r; | |
350 | ||
351 | assert(device); | |
352 | assert(gid); | |
353 | ||
354 | r = safe_atou(gid, &g); | |
355 | if (r < 0) | |
356 | return r; | |
357 | ||
358 | r = device_add_property_internal(device, "DEVGID", gid); | |
359 | if (r < 0) | |
360 | return r; | |
361 | ||
362 | device->devgid = g; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
401cb614 | 367 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
368 | int r; |
369 | ||
370 | assert(device); | |
371 | assert(key); | |
372 | assert(value); | |
373 | ||
374 | if (streq(key, "DEVPATH")) { | |
375 | char *path; | |
376 | ||
377 | path = strjoina("/sys", value); | |
378 | ||
379 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
380 | r = device_set_syspath(device, path, false); | |
381 | if (r < 0) | |
382 | return log_debug_errno(r, "sd-device: could not set syspath to '%s': %m", path); | |
383 | } else if (streq(key, "SUBSYSTEM")) { | |
384 | r = device_set_subsystem(device, value); | |
385 | if (r < 0) | |
386 | return log_debug_errno(r, "sd-device: could not set subsystem to '%s': %m", value); | |
387 | } else if (streq(key, "DEVTYPE")) { | |
388 | r = device_set_devtype(device, value); | |
389 | if (r < 0) | |
390 | return log_debug_errno(r, "sd-device: could not set devtype to '%s': %m", value); | |
391 | } else if (streq(key, "DEVNAME")) { | |
392 | r = device_set_devname(device, value); | |
393 | if (r < 0) | |
394 | return log_debug_errno(r, "sd-device: could not set devname to '%s': %m", value); | |
395 | } else if (streq(key, "USEC_INITIALIZED")) { | |
396 | r = device_set_usec_initialized(device, value); | |
397 | if (r < 0) | |
398 | return log_debug_errno(r, "sd-device: could not set usec-initialized to '%s': %m", value); | |
399 | } else if (streq(key, "DRIVER")) { | |
400 | r = device_set_driver(device, value); | |
401 | if (r < 0) | |
402 | return log_debug_errno(r, "sd-device: could not set driver to '%s': %m", value); | |
403 | } else if (streq(key, "IFINDEX")) { | |
404 | r = device_set_ifindex(device, value); | |
405 | if (r < 0) | |
406 | return log_debug_errno(r, "sd-device: could not set ifindex to '%s': %m", value); | |
407 | } else if (streq(key, "DEVMODE")) { | |
408 | r = device_set_devmode(device, value); | |
409 | if (r < 0) | |
410 | return log_debug_errno(r, "sd-device: could not set devmode to '%s': %m", value); | |
411 | } else if (streq(key, "DEVUID")) { | |
412 | r = device_set_devuid(device, value); | |
413 | if (r < 0) | |
414 | return log_debug_errno(r, "sd-device: could not set devuid to '%s': %m", value); | |
415 | } else if (streq(key, "DEVGID")) { | |
416 | r = device_set_devgid(device, value); | |
417 | if (r < 0) | |
418 | return log_debug_errno(r, "sd-device: could not set devgid to '%s': %m", value); | |
419 | } else if (streq(key, "DEVLINKS")) { | |
4df4fd11 TG |
420 | const char *word, *state; |
421 | size_t l; | |
57fa1d09 | 422 | |
4df4fd11 | 423 | FOREACH_WORD(word, l, value, state) { |
de9b34b6 | 424 | char devlink[l + 1]; |
57fa1d09 | 425 | |
de9b34b6 TG |
426 | strncpy(devlink, word, l); |
427 | devlink[l] = '\0'; | |
57fa1d09 | 428 | |
4df4fd11 | 429 | r = device_add_devlink(device, devlink); |
57fa1d09 | 430 | if (r < 0) |
4df4fd11 | 431 | return log_debug_errno(r, "sd-device: could not add devlink '%s': %m", devlink); |
57fa1d09 TG |
432 | } |
433 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
434 | const char *word, *state; |
435 | size_t l; | |
57fa1d09 | 436 | |
4df4fd11 | 437 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
de9b34b6 | 438 | char tag[l + 1]; |
57fa1d09 | 439 | |
de9b34b6 TG |
440 | (void)strncpy(tag, word, l); |
441 | tag[l] = '\0'; | |
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; | |
ccc1002a TG |
637 | _cleanup_free_ char **buf_strv = NULL; |
638 | _cleanup_free_ uint8_t *buf_nulstr = NULL; | |
d854ba50 | 639 | size_t allocated_nulstr = 0; |
ccc1002a | 640 | size_t nulstr_len = 0, num = 0, i = 0; |
57fa1d09 TG |
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 | ||
57fa1d09 TG |
656 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
657 | nulstr_len += len + 1; | |
d854ba50 | 658 | ++num; |
57fa1d09 TG |
659 | } |
660 | ||
ccc1002a TG |
661 | /* build buf_strv from buf_nulstr */ |
662 | buf_strv = new0(char *, num + 1); | |
663 | if (!buf_strv) | |
664 | return -ENOMEM; | |
d854ba50 | 665 | |
d854ba50 | 666 | NULSTR_FOREACH(val, (char*) buf_nulstr) { |
ccc1002a | 667 | buf_strv[i] = (char *) val; |
d854ba50 MP |
668 | assert(i < num); |
669 | i++; | |
670 | } | |
57fa1d09 | 671 | |
ccc1002a TG |
672 | free(device->properties_nulstr); |
673 | device->properties_nulstr = buf_nulstr; | |
674 | buf_nulstr = NULL; | |
675 | device->properties_nulstr_len = nulstr_len; | |
676 | free(device->properties_strv); | |
677 | device->properties_strv = buf_strv; | |
678 | buf_strv = NULL; | |
679 | ||
57fa1d09 TG |
680 | device->properties_buf_outdated = false; |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
686 | int r; | |
687 | ||
688 | assert(device); | |
689 | assert(nulstr); | |
690 | assert(len); | |
691 | ||
aa20f49a TG |
692 | r = device_update_properties_bufs(device); |
693 | if (r < 0) | |
694 | return r; | |
57fa1d09 TG |
695 | |
696 | *nulstr = device->properties_nulstr; | |
697 | *len = device->properties_nulstr_len; | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
703 | int r; | |
704 | ||
705 | assert(device); | |
706 | assert(strv); | |
707 | ||
708 | r = device_update_properties_bufs(device); | |
709 | if (r < 0) | |
710 | return r; | |
711 | ||
712 | *strv = device->properties_strv; | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
718 | int r; | |
719 | ||
720 | assert(device); | |
721 | assert(priority); | |
722 | ||
723 | r = device_read_db(device); | |
724 | if (r < 0) | |
725 | return r; | |
726 | ||
727 | *priority = device->devlink_priority; | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | int device_get_watch_handle(sd_device *device, int *handle) { | |
733 | int r; | |
734 | ||
735 | assert(device); | |
736 | assert(handle); | |
737 | ||
738 | r = device_read_db(device); | |
739 | if (r < 0) | |
740 | return r; | |
741 | ||
742 | *handle = device->watch_handle; | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | void device_set_watch_handle(sd_device *device, int handle) { | |
748 | assert(device); | |
749 | ||
750 | device->watch_handle = handle; | |
751 | } | |
752 | ||
753 | int device_rename(sd_device *device, const char *name) { | |
754 | _cleanup_free_ char *dirname = NULL; | |
755 | char *new_syspath; | |
756 | const char *interface; | |
757 | int r; | |
758 | ||
759 | assert(device); | |
760 | assert(name); | |
761 | ||
762 | dirname = dirname_malloc(device->syspath); | |
763 | if (!dirname) | |
764 | return -ENOMEM; | |
765 | ||
766 | new_syspath = strjoina(dirname, "/", name); | |
767 | ||
768 | /* the user must trust that the new name is correct */ | |
769 | r = device_set_syspath(device, new_syspath, false); | |
770 | if (r < 0) | |
771 | return r; | |
772 | ||
773 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
774 | if (r >= 0) { | |
775 | r = device_add_property_internal(device, "INTERFACE", name); | |
776 | if (r < 0) | |
777 | return r; | |
778 | ||
779 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ | |
780 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
781 | if (r < 0) | |
782 | return r; | |
783 | } else if (r != -ENOENT) | |
784 | return r; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
790 | _cleanup_device_unref_ sd_device *ret = NULL; | |
791 | int r; | |
792 | ||
793 | assert(old_device); | |
794 | assert(new_device); | |
795 | ||
796 | r = device_new_aux(&ret); | |
797 | if (r < 0) | |
798 | return r; | |
799 | ||
800 | r = device_set_syspath(ret, old_device->syspath, false); | |
801 | if (r < 0) | |
802 | return r; | |
803 | ||
804 | r = device_set_subsystem(ret, old_device->subsystem); | |
805 | if (r < 0) | |
806 | return r; | |
807 | ||
808 | ret->devnum = old_device->devnum; | |
809 | ||
810 | *new_device = ret; | |
811 | ret = NULL; | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
817 | _cleanup_device_unref_ sd_device *ret = NULL; | |
818 | int r; | |
819 | ||
820 | assert(old_device); | |
821 | assert(new_device); | |
822 | ||
823 | r = device_shallow_clone(old_device, &ret); | |
824 | if (r < 0) | |
825 | return r; | |
826 | ||
827 | r = device_read_db(ret); | |
828 | if (r < 0) | |
829 | return r; | |
830 | ||
831 | ret->sealed = true; | |
832 | ||
833 | *new_device = ret; | |
834 | ret = NULL; | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
840 | _cleanup_device_unref_ sd_device *ret = NULL; | |
841 | int r; | |
842 | ||
843 | assert(new_device); | |
844 | assert(syspath); | |
845 | assert(action); | |
846 | ||
847 | r = sd_device_new_from_syspath(&ret, syspath); | |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
851 | r = device_read_uevent_file(ret); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | r = device_add_property_internal(ret, "ACTION", action); | |
856 | if (r < 0) | |
857 | return r; | |
858 | ||
859 | *new_device = ret; | |
860 | ret = NULL; | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { | |
866 | const char *property, *value; | |
867 | int r; | |
868 | ||
869 | assert(device_dst); | |
870 | assert(device_src); | |
871 | ||
872 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
873 | r = device_add_property(device_dst, property, value); | |
874 | if (r < 0) | |
875 | return r; | |
876 | } | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | void device_cleanup_tags(sd_device *device) { | |
882 | assert(device); | |
883 | ||
884 | set_free_free(device->tags); | |
885 | device->tags = NULL; | |
886 | device->property_tags_outdated = true; | |
887 | device->tags_generation ++; | |
888 | } | |
889 | ||
890 | void device_cleanup_devlinks(sd_device *device) { | |
891 | assert(device); | |
892 | ||
893 | set_free_free(device->devlinks); | |
894 | device->devlinks = NULL; | |
895 | device->property_devlinks_outdated = true; | |
896 | device->devlinks_generation ++; | |
897 | } | |
898 | ||
899 | void device_remove_tag(sd_device *device, const char *tag) { | |
900 | assert(device); | |
901 | assert(tag); | |
902 | ||
903 | free(set_remove(device->tags, tag)); | |
904 | device->property_tags_outdated = true; | |
905 | device->tags_generation ++; | |
906 | } | |
907 | ||
908 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
909 | const char *id; | |
910 | char *path; | |
911 | int r; | |
912 | ||
913 | assert(device); | |
914 | assert(tag); | |
915 | ||
916 | r = device_get_id_filename(device, &id); | |
917 | if (r < 0) | |
918 | return r; | |
919 | ||
920 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
921 | ||
922 | if (add) { | |
923 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
924 | if (r < 0) | |
925 | return r; | |
926 | } else { | |
927 | r = unlink(path); | |
928 | if (r < 0 && errno != ENOENT) | |
929 | return -errno; | |
930 | } | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
936 | const char *tag; | |
937 | int r = 0, k; | |
938 | ||
939 | if (add && device_old) { | |
940 | /* delete possible left-over tags */ | |
941 | FOREACH_DEVICE_TAG(device_old, tag) { | |
942 | if (!sd_device_has_tag(device, tag)) { | |
943 | k = device_tag(device_old, tag, false); | |
944 | if (r >= 0 && k < 0) | |
945 | r = k; | |
946 | } | |
947 | } | |
948 | } | |
949 | ||
950 | FOREACH_DEVICE_TAG(device, tag) { | |
951 | k = device_tag(device, tag, add); | |
952 | if (r >= 0 && k < 0) | |
953 | r = k; | |
954 | } | |
955 | ||
956 | return r; | |
957 | } | |
958 | ||
959 | static bool device_has_info(sd_device *device) { | |
960 | assert(device); | |
961 | ||
962 | if (!set_isempty(device->devlinks)) | |
963 | return true; | |
964 | ||
965 | if (device->devlink_priority != 0) | |
966 | return true; | |
967 | ||
968 | if (!ordered_hashmap_isempty(device->properties_db)) | |
969 | return true; | |
970 | ||
971 | if (!set_isempty(device->tags)) | |
972 | return true; | |
973 | ||
974 | if (device->watch_handle >= 0) | |
975 | return true; | |
976 | ||
977 | return false; | |
978 | } | |
979 | ||
980 | void device_set_db_persist(sd_device *device) { | |
981 | assert(device); | |
982 | ||
983 | device->db_persist = true; | |
984 | } | |
985 | ||
986 | int device_update_db(sd_device *device) { | |
987 | const char *id; | |
988 | char *path; | |
989 | _cleanup_fclose_ FILE *f = NULL; | |
990 | _cleanup_free_ char *path_tmp = NULL; | |
991 | bool has_info; | |
992 | int r; | |
993 | ||
994 | assert(device); | |
995 | ||
996 | has_info = device_has_info(device); | |
997 | ||
998 | r = device_get_id_filename(device, &id); | |
999 | if (r < 0) | |
1000 | return r; | |
1001 | ||
1002 | path = strjoina("/run/udev/data/", id); | |
1003 | ||
1004 | /* do not store anything for otherwise empty devices */ | |
1005 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
1006 | r = unlink(path); | |
1007 | if (r < 0 && errno != ENOENT) | |
1008 | return -errno; | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | /* write a database file */ | |
1014 | r = mkdir_parents(path, 0755); | |
1015 | if (r < 0) | |
1016 | return r; | |
1017 | ||
1018 | r = fopen_temporary(path, &f, &path_tmp); | |
1019 | if (r < 0) | |
1020 | return r; | |
1021 | ||
1022 | /* | |
1023 | * set 'sticky' bit to indicate that we should not clean the | |
1024 | * database when we transition from initramfs to the real root | |
1025 | */ | |
1026 | if (device->db_persist) { | |
1027 | r = fchmod(fileno(f), 01644); | |
1028 | if (r < 0) { | |
1029 | r = -errno; | |
1030 | goto fail; | |
1031 | } | |
1032 | } else { | |
1033 | r = fchmod(fileno(f), 0644); | |
1034 | if (r < 0) { | |
1035 | r = -errno; | |
1036 | goto fail; | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | if (has_info) { | |
1041 | const char *property, *value, *tag; | |
1042 | Iterator i; | |
1043 | ||
1044 | if (major(device->devnum) > 0) { | |
1045 | const char *devlink; | |
1046 | ||
1047 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
1048 | fprintf(f, "S:%s\n", devlink + strlen("/dev/")); | |
1049 | ||
1050 | if (device->devlink_priority != 0) | |
1051 | fprintf(f, "L:%i\n", device->devlink_priority); | |
1052 | ||
1053 | if (device->watch_handle >= 0) | |
1054 | fprintf(f, "W:%i\n", device->watch_handle); | |
1055 | } | |
1056 | ||
1057 | if (device->usec_initialized > 0) | |
1058 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
1059 | ||
1060 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
1061 | fprintf(f, "E:%s=%s\n", property, value); | |
1062 | ||
1063 | FOREACH_DEVICE_TAG(device, tag) | |
1064 | fprintf(f, "G:%s\n", tag); | |
1065 | } | |
1066 | ||
1067 | r = fflush_and_check(f); | |
1068 | if (r < 0) | |
1069 | goto fail; | |
1070 | ||
1071 | r = rename(path_tmp, path); | |
1072 | if (r < 0) { | |
1073 | r = -errno; | |
1074 | goto fail; | |
1075 | } | |
1076 | ||
1077 | log_debug("created %s file '%s' for '%s'", has_info ? "db" : "empty", | |
1078 | path, device->devpath); | |
1079 | ||
1080 | return 0; | |
1081 | ||
1082 | fail: | |
dacd6cee LP |
1083 | (void) unlink(path); |
1084 | (void) unlink(path_tmp); | |
57fa1d09 | 1085 | |
dacd6cee | 1086 | return log_error_errno(r, "failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath); |
57fa1d09 TG |
1087 | } |
1088 | ||
1089 | int device_delete_db(sd_device *device) { | |
1090 | const char *id; | |
1091 | char *path; | |
1092 | int r; | |
1093 | ||
1094 | assert(device); | |
1095 | ||
1096 | r = device_get_id_filename(device, &id); | |
1097 | if (r < 0) | |
1098 | return r; | |
1099 | ||
1100 | path = strjoina("/run/udev/data/", id); | |
1101 | ||
1102 | r = unlink(path); | |
1103 | if (r < 0 && errno != ENOENT) | |
1104 | return -errno; | |
1105 | ||
1106 | return 0; | |
1107 | } | |
107f2e25 TG |
1108 | |
1109 | int device_read_db_force(sd_device *device) { | |
1110 | assert(device); | |
1111 | ||
1112 | return device_read_db_aux(device, true); | |
1113 | } |