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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 | 29 | #include "device-util.h" |
3ffd4af2 | 30 | #include "fd-util.h" |
07630cea | 31 | #include "fileio.h" |
f4f15635 | 32 | #include "fs-util.h" |
07630cea LP |
33 | #include "hashmap.h" |
34 | #include "macro.h" | |
35 | #include "mkdir.h" | |
6bedfcbb | 36 | #include "parse-util.h" |
07630cea LP |
37 | #include "path-util.h" |
38 | #include "refcnt.h" | |
39 | #include "set.h" | |
40 | #include "string-util.h" | |
41 | #include "strv.h" | |
42 | #include "strxcpyx.h" | |
43 | #include "util.h" | |
57fa1d09 TG |
44 | |
45 | int device_add_property(sd_device *device, const char *key, const char *value) { | |
46 | int r; | |
47 | ||
48 | assert(device); | |
49 | assert(key); | |
50 | ||
51 | r = device_add_property_aux(device, key, value, false); | |
52 | if (r < 0) | |
53 | return r; | |
54 | ||
55 | if (key[0] != '.') { | |
56 | r = device_add_property_aux(device, key, value, true); | |
57 | if (r < 0) | |
58 | return r; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
65 | _cleanup_free_ char *key = NULL; | |
66 | char *value; | |
67 | ||
68 | assert(device); | |
69 | assert(str); | |
70 | ||
71 | key = strdup(str); | |
72 | if (!key) | |
73 | return -ENOMEM; | |
74 | ||
75 | value = strchr(key, '='); | |
76 | if (!value) | |
77 | return -EINVAL; | |
78 | ||
79 | *value = '\0'; | |
80 | ||
81 | if (isempty(++value)) | |
82 | value = NULL; | |
83 | ||
84 | return device_add_property_internal(device, key, value); | |
85 | } | |
86 | ||
87 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
88 | char *path; | |
89 | int r; | |
90 | ||
91 | assert(device); | |
92 | assert(value); | |
93 | ||
94 | switch (key) { | |
95 | case 'S': | |
96 | path = strjoina("/dev/", value); | |
97 | r = device_add_devlink(device, path); | |
98 | if (r < 0) | |
99 | return r; | |
100 | ||
101 | break; | |
102 | case 'L': | |
103 | r = safe_atoi(value, &device->devlink_priority); | |
104 | if (r < 0) | |
105 | return r; | |
106 | ||
107 | break; | |
108 | case 'E': | |
109 | r = device_add_property_internal_from_string(device, value); | |
110 | if (r < 0) | |
111 | return r; | |
112 | ||
113 | break; | |
114 | case 'G': | |
115 | r = device_add_tag(device, value); | |
116 | if (r < 0) | |
117 | return r; | |
118 | ||
119 | break; | |
120 | case 'W': | |
121 | r = safe_atoi(value, &device->watch_handle); | |
122 | if (r < 0) | |
123 | return r; | |
124 | ||
125 | break; | |
126 | case 'I': | |
127 | r = device_set_usec_initialized(device, value); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
131 | break; | |
132 | default: | |
133 | log_debug("device db: unknown key '%c'", key); | |
134 | } | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | void device_set_devlink_priority(sd_device *device, int priority) { | |
140 | assert(device); | |
141 | ||
142 | device->devlink_priority = priority; | |
143 | } | |
144 | ||
145 | void device_set_is_initialized(sd_device *device) { | |
146 | assert(device); | |
147 | ||
148 | device->is_initialized = true; | |
149 | } | |
150 | ||
151 | int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { | |
152 | char num[DECIMAL_STR_MAX(usec_t)]; | |
153 | usec_t usec_initialized; | |
154 | int r; | |
155 | ||
156 | assert(device); | |
157 | ||
158 | if (device_old && device_old->usec_initialized > 0) | |
159 | usec_initialized = device_old->usec_initialized; | |
160 | else | |
161 | usec_initialized = now(CLOCK_MONOTONIC); | |
162 | ||
163 | r = snprintf(num, sizeof(num), USEC_FMT, usec_initialized); | |
164 | if (r < 0) | |
165 | return -errno; | |
166 | ||
167 | r = device_set_usec_initialized(device, num); | |
168 | if (r < 0) | |
169 | return r; | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static int device_read_db(sd_device *device) { | |
175 | _cleanup_free_ char *db = NULL; | |
176 | char *path; | |
177 | const char *id, *value; | |
178 | char key; | |
179 | size_t db_len; | |
180 | unsigned i; | |
181 | int r; | |
182 | ||
183 | enum { | |
184 | PRE_KEY, | |
185 | KEY, | |
186 | PRE_VALUE, | |
187 | VALUE, | |
188 | INVALID_LINE, | |
189 | } state = PRE_KEY; | |
190 | ||
191 | assert(device); | |
192 | ||
193 | if (device->db_loaded || device->sealed) | |
194 | return 0; | |
195 | ||
196 | r = device_get_id_filename(device, &id); | |
197 | if (r < 0) | |
198 | return r; | |
199 | ||
200 | path = strjoina("/run/udev/data/", id); | |
201 | ||
202 | r = read_full_file(path, &db, &db_len); | |
203 | if (r < 0) { | |
204 | if (r == -ENOENT) | |
205 | return 0; | |
e53fc357 LP |
206 | else |
207 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
208 | } |
209 | ||
210 | /* devices with a database entry are initialized */ | |
211 | device_set_is_initialized(device); | |
212 | ||
213 | for (i = 0; i < db_len; i++) { | |
214 | switch (state) { | |
215 | case PRE_KEY: | |
216 | if (!strchr(NEWLINE, db[i])) { | |
217 | key = db[i]; | |
218 | ||
219 | state = KEY; | |
220 | } | |
221 | ||
222 | break; | |
223 | case KEY: | |
224 | if (db[i] != ':') { | |
225 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
226 | ||
227 | state = INVALID_LINE; | |
228 | } else { | |
229 | db[i] = '\0'; | |
230 | ||
231 | state = PRE_VALUE; | |
232 | } | |
233 | ||
234 | break; | |
235 | case PRE_VALUE: | |
236 | value = &db[i]; | |
237 | ||
238 | state = VALUE; | |
239 | ||
240 | break; | |
241 | case INVALID_LINE: | |
242 | if (strchr(NEWLINE, db[i])) | |
243 | state = PRE_KEY; | |
244 | ||
245 | break; | |
246 | case VALUE: | |
247 | if (strchr(NEWLINE, db[i])) { | |
248 | db[i] = '\0'; | |
249 | r = handle_db_line(device, key, value); | |
250 | if (r < 0) | |
e53fc357 | 251 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
252 | |
253 | state = PRE_KEY; | |
254 | } | |
255 | ||
256 | break; | |
257 | default: | |
258 | assert_not_reached("invalid state when parsing db"); | |
259 | } | |
260 | } | |
261 | ||
262 | device->db_loaded = true; | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | uint64_t device_get_properties_generation(sd_device *device) { | |
268 | assert(device); | |
269 | ||
270 | return device->properties_generation; | |
271 | } | |
272 | ||
273 | uint64_t device_get_tags_generation(sd_device *device) { | |
274 | assert(device); | |
275 | ||
276 | return device->tags_generation; | |
277 | } | |
278 | ||
279 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
280 | assert(device); | |
281 | ||
282 | return device->devlinks_generation; | |
283 | } | |
284 | ||
285 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
286 | int r; | |
287 | ||
288 | assert(device); | |
289 | assert(mode); | |
290 | ||
291 | r = device_read_db(device); | |
292 | if (r < 0) | |
293 | return r; | |
294 | ||
295 | *mode = device->devmode; | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
301 | int r; | |
302 | ||
303 | assert(device); | |
304 | assert(uid); | |
305 | ||
306 | r = device_read_db(device); | |
307 | if (r < 0) | |
308 | return r; | |
309 | ||
310 | *uid = device->devuid; | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int device_set_devuid(sd_device *device, const char *uid) { | |
316 | unsigned u; | |
317 | int r; | |
318 | ||
319 | assert(device); | |
320 | assert(uid); | |
321 | ||
322 | r = safe_atou(uid, &u); | |
323 | if (r < 0) | |
324 | return r; | |
325 | ||
326 | r = device_add_property_internal(device, "DEVUID", uid); | |
327 | if (r < 0) | |
328 | return r; | |
329 | ||
330 | device->devuid = u; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
336 | int r; | |
337 | ||
338 | assert(device); | |
339 | assert(gid); | |
340 | ||
341 | r = device_read_db(device); | |
342 | if (r < 0) | |
343 | return r; | |
344 | ||
345 | *gid = device->devgid; | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | static int device_set_devgid(sd_device *device, const char *gid) { | |
351 | unsigned g; | |
352 | int r; | |
353 | ||
354 | assert(device); | |
355 | assert(gid); | |
356 | ||
357 | r = safe_atou(gid, &g); | |
358 | if (r < 0) | |
359 | return r; | |
360 | ||
361 | r = device_add_property_internal(device, "DEVGID", gid); | |
362 | if (r < 0) | |
363 | return r; | |
364 | ||
365 | device->devgid = g; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
401cb614 | 370 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
371 | int r; |
372 | ||
373 | assert(device); | |
374 | assert(key); | |
375 | assert(value); | |
376 | ||
377 | if (streq(key, "DEVPATH")) { | |
378 | char *path; | |
379 | ||
380 | path = strjoina("/sys", value); | |
381 | ||
382 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
383 | r = device_set_syspath(device, path, false); | |
384 | if (r < 0) | |
385 | return log_debug_errno(r, "sd-device: could not set syspath to '%s': %m", path); | |
386 | } else if (streq(key, "SUBSYSTEM")) { | |
387 | r = device_set_subsystem(device, value); | |
388 | if (r < 0) | |
389 | return log_debug_errno(r, "sd-device: could not set subsystem to '%s': %m", value); | |
390 | } else if (streq(key, "DEVTYPE")) { | |
391 | r = device_set_devtype(device, value); | |
392 | if (r < 0) | |
393 | return log_debug_errno(r, "sd-device: could not set devtype to '%s': %m", value); | |
394 | } else if (streq(key, "DEVNAME")) { | |
395 | r = device_set_devname(device, value); | |
396 | if (r < 0) | |
397 | return log_debug_errno(r, "sd-device: could not set devname to '%s': %m", value); | |
398 | } else if (streq(key, "USEC_INITIALIZED")) { | |
399 | r = device_set_usec_initialized(device, value); | |
400 | if (r < 0) | |
401 | return log_debug_errno(r, "sd-device: could not set usec-initialized to '%s': %m", value); | |
402 | } else if (streq(key, "DRIVER")) { | |
403 | r = device_set_driver(device, value); | |
404 | if (r < 0) | |
405 | return log_debug_errno(r, "sd-device: could not set driver to '%s': %m", value); | |
406 | } else if (streq(key, "IFINDEX")) { | |
407 | r = device_set_ifindex(device, value); | |
408 | if (r < 0) | |
409 | return log_debug_errno(r, "sd-device: could not set ifindex to '%s': %m", value); | |
410 | } else if (streq(key, "DEVMODE")) { | |
411 | r = device_set_devmode(device, value); | |
412 | if (r < 0) | |
413 | return log_debug_errno(r, "sd-device: could not set devmode to '%s': %m", value); | |
414 | } else if (streq(key, "DEVUID")) { | |
415 | r = device_set_devuid(device, value); | |
416 | if (r < 0) | |
417 | return log_debug_errno(r, "sd-device: could not set devuid to '%s': %m", value); | |
418 | } else if (streq(key, "DEVGID")) { | |
419 | r = device_set_devgid(device, value); | |
420 | if (r < 0) | |
421 | return log_debug_errno(r, "sd-device: could not set devgid to '%s': %m", value); | |
422 | } else if (streq(key, "DEVLINKS")) { | |
4df4fd11 TG |
423 | const char *word, *state; |
424 | size_t l; | |
57fa1d09 | 425 | |
4df4fd11 | 426 | FOREACH_WORD(word, l, value, state) { |
de9b34b6 | 427 | char devlink[l + 1]; |
57fa1d09 | 428 | |
de9b34b6 TG |
429 | strncpy(devlink, word, l); |
430 | devlink[l] = '\0'; | |
57fa1d09 | 431 | |
4df4fd11 | 432 | r = device_add_devlink(device, devlink); |
57fa1d09 | 433 | if (r < 0) |
4df4fd11 | 434 | return log_debug_errno(r, "sd-device: could not add devlink '%s': %m", devlink); |
57fa1d09 TG |
435 | } |
436 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
437 | const char *word, *state; |
438 | size_t l; | |
57fa1d09 | 439 | |
4df4fd11 | 440 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
de9b34b6 | 441 | char tag[l + 1]; |
57fa1d09 | 442 | |
de9b34b6 TG |
443 | (void)strncpy(tag, word, l); |
444 | tag[l] = '\0'; | |
57fa1d09 | 445 | |
4df4fd11 | 446 | r = device_add_tag(device, tag); |
57fa1d09 | 447 | if (r < 0) |
4df4fd11 | 448 | return log_debug_errno(r, "sd-device: could not add tag '%s': %m", tag); |
57fa1d09 TG |
449 | } |
450 | } else { | |
451 | r = device_add_property_internal(device, key, value); | |
452 | if (r < 0) | |
453 | return log_debug_errno(r, "sd-device: could not add property '%s=%s': %m", key, value); | |
454 | } | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static const char* const device_action_table[_DEVICE_ACTION_MAX] = { | |
460 | [DEVICE_ACTION_ADD] = "add", | |
461 | [DEVICE_ACTION_REMOVE] = "remove", | |
462 | [DEVICE_ACTION_CHANGE] = "change", | |
463 | [DEVICE_ACTION_MOVE] = "move", | |
464 | [DEVICE_ACTION_ONLINE] = "online", | |
465 | [DEVICE_ACTION_OFFLINE] = "offline", | |
466 | }; | |
467 | ||
468 | DEFINE_STRING_TABLE_LOOKUP(device_action, DeviceAction); | |
469 | ||
470 | static int device_append(sd_device *device, char *key, const char **_major, const char **_minor, uint64_t *_seqnum, | |
471 | DeviceAction *_action) { | |
472 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
473 | uint64_t seqnum = 0; | |
474 | const char *major = NULL, *minor = NULL; | |
475 | char *value; | |
476 | int r; | |
477 | ||
478 | assert(device); | |
479 | assert(key); | |
480 | assert(_major); | |
481 | assert(_minor); | |
482 | assert(_seqnum); | |
483 | assert(_action); | |
484 | ||
485 | value = strchr(key, '='); | |
486 | if (!value) { | |
487 | log_debug("sd-device: not a key-value pair: '%s'", key); | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | *value = '\0'; | |
492 | ||
493 | value++; | |
494 | ||
495 | if (streq(key, "MAJOR")) | |
496 | major = value; | |
497 | else if (streq(key, "MINOR")) | |
498 | minor = value; | |
499 | else { | |
500 | if (streq(key, "ACTION")) { | |
501 | action = device_action_from_string(value); | |
502 | if (action == _DEVICE_ACTION_INVALID) | |
503 | return -EINVAL; | |
504 | } else if (streq(key, "SEQNUM")) { | |
505 | r = safe_atou64(value, &seqnum); | |
506 | if (r < 0) | |
507 | return r; | |
508 | else if (seqnum == 0) | |
509 | /* kernel only sends seqnum > 0 */ | |
510 | return -EINVAL; | |
511 | } | |
512 | ||
401cb614 | 513 | r = device_amend(device, key, value); |
57fa1d09 TG |
514 | if (r < 0) |
515 | return r; | |
516 | } | |
517 | ||
518 | if (major != 0) | |
519 | *_major = major; | |
520 | ||
521 | if (minor != 0) | |
522 | *_minor = minor; | |
523 | ||
524 | if (action != _DEVICE_ACTION_INVALID) | |
525 | *_action = action; | |
526 | ||
527 | if (seqnum > 0) | |
528 | *_seqnum = seqnum; | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | void device_seal(sd_device *device) { | |
534 | assert(device); | |
535 | ||
536 | device->sealed = true; | |
537 | } | |
538 | ||
539 | static int device_verify(sd_device *device, DeviceAction action, uint64_t seqnum) { | |
540 | assert(device); | |
541 | ||
542 | if (!device->devpath || !device->subsystem || action == _DEVICE_ACTION_INVALID || seqnum == 0) { | |
543 | log_debug("sd-device: device created from strv lacks devpath, subsystem, action or seqnum"); | |
544 | return -EINVAL; | |
545 | } | |
546 | ||
547 | device->sealed = true; | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | int device_new_from_strv(sd_device **ret, char **strv) { | |
553 | _cleanup_device_unref_ sd_device *device = NULL; | |
554 | char **key; | |
555 | const char *major = NULL, *minor = NULL; | |
556 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
557 | uint64_t seqnum; | |
558 | int r; | |
559 | ||
560 | assert(ret); | |
561 | assert(strv); | |
562 | ||
563 | r = device_new_aux(&device); | |
564 | if (r < 0) | |
565 | return r; | |
566 | ||
567 | STRV_FOREACH(key, strv) { | |
568 | r = device_append(device, *key, &major, &minor, &seqnum, &action); | |
569 | if (r < 0) | |
570 | return r; | |
571 | } | |
572 | ||
573 | if (major) { | |
574 | r = device_set_devnum(device, major, minor); | |
575 | if (r < 0) | |
576 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
577 | } | |
578 | ||
579 | r = device_verify(device, action, seqnum); | |
580 | if (r < 0) | |
581 | return r; | |
582 | ||
583 | *ret = device; | |
584 | device = NULL; | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { | |
590 | _cleanup_device_unref_ sd_device *device = NULL; | |
591 | const char *major = NULL, *minor = NULL; | |
592 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
593 | uint64_t seqnum; | |
594 | unsigned i = 0; | |
595 | int r; | |
596 | ||
597 | assert(ret); | |
598 | assert(nulstr); | |
599 | assert(len); | |
600 | ||
601 | r = device_new_aux(&device); | |
602 | if (r < 0) | |
603 | return r; | |
604 | ||
605 | while (i < len) { | |
606 | char *key; | |
607 | const char *end; | |
608 | ||
609 | key = (char*)&nulstr[i]; | |
610 | end = memchr(key, '\0', len - i); | |
611 | if (!end) { | |
612 | log_debug("sd-device: failed to parse nulstr"); | |
613 | return -EINVAL; | |
614 | } | |
615 | i += end - key + 1; | |
616 | ||
617 | r = device_append(device, key, &major, &minor, &seqnum, &action); | |
618 | if (r < 0) | |
619 | return r; | |
620 | } | |
621 | ||
622 | if (major) { | |
623 | r = device_set_devnum(device, major, minor); | |
624 | if (r < 0) | |
625 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
626 | } | |
627 | ||
628 | r = device_verify(device, action, seqnum); | |
629 | if (r < 0) | |
630 | return r; | |
631 | ||
632 | *ret = device; | |
633 | device = NULL; | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | static int device_update_properties_bufs(sd_device *device) { | |
639 | const char *val, *prop; | |
ccc1002a TG |
640 | _cleanup_free_ char **buf_strv = NULL; |
641 | _cleanup_free_ uint8_t *buf_nulstr = NULL; | |
d854ba50 | 642 | size_t allocated_nulstr = 0; |
ccc1002a | 643 | size_t nulstr_len = 0, num = 0, i = 0; |
57fa1d09 TG |
644 | |
645 | assert(device); | |
646 | ||
aa20f49a TG |
647 | if (!device->properties_buf_outdated) |
648 | return 0; | |
649 | ||
57fa1d09 TG |
650 | FOREACH_DEVICE_PROPERTY(device, prop, val) { |
651 | size_t len = 0; | |
652 | ||
653 | len = strlen(prop) + 1 + strlen(val); | |
654 | ||
655 | buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); | |
656 | if (!buf_nulstr) | |
657 | return -ENOMEM; | |
658 | ||
57fa1d09 TG |
659 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
660 | nulstr_len += len + 1; | |
d854ba50 | 661 | ++num; |
57fa1d09 TG |
662 | } |
663 | ||
ccc1002a TG |
664 | /* build buf_strv from buf_nulstr */ |
665 | buf_strv = new0(char *, num + 1); | |
666 | if (!buf_strv) | |
667 | return -ENOMEM; | |
d854ba50 | 668 | |
d854ba50 | 669 | NULSTR_FOREACH(val, (char*) buf_nulstr) { |
ccc1002a | 670 | buf_strv[i] = (char *) val; |
d854ba50 MP |
671 | assert(i < num); |
672 | i++; | |
673 | } | |
57fa1d09 | 674 | |
ccc1002a TG |
675 | free(device->properties_nulstr); |
676 | device->properties_nulstr = buf_nulstr; | |
677 | buf_nulstr = NULL; | |
678 | device->properties_nulstr_len = nulstr_len; | |
679 | free(device->properties_strv); | |
680 | device->properties_strv = buf_strv; | |
681 | buf_strv = NULL; | |
682 | ||
57fa1d09 TG |
683 | device->properties_buf_outdated = false; |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
689 | int r; | |
690 | ||
691 | assert(device); | |
692 | assert(nulstr); | |
693 | assert(len); | |
694 | ||
aa20f49a TG |
695 | r = device_update_properties_bufs(device); |
696 | if (r < 0) | |
697 | return r; | |
57fa1d09 TG |
698 | |
699 | *nulstr = device->properties_nulstr; | |
700 | *len = device->properties_nulstr_len; | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
706 | int r; | |
707 | ||
708 | assert(device); | |
709 | assert(strv); | |
710 | ||
711 | r = device_update_properties_bufs(device); | |
712 | if (r < 0) | |
713 | return r; | |
714 | ||
715 | *strv = device->properties_strv; | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
721 | int r; | |
722 | ||
723 | assert(device); | |
724 | assert(priority); | |
725 | ||
726 | r = device_read_db(device); | |
727 | if (r < 0) | |
728 | return r; | |
729 | ||
730 | *priority = device->devlink_priority; | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
735 | int device_get_watch_handle(sd_device *device, int *handle) { | |
736 | int r; | |
737 | ||
738 | assert(device); | |
739 | assert(handle); | |
740 | ||
741 | r = device_read_db(device); | |
742 | if (r < 0) | |
743 | return r; | |
744 | ||
745 | *handle = device->watch_handle; | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | void device_set_watch_handle(sd_device *device, int handle) { | |
751 | assert(device); | |
752 | ||
753 | device->watch_handle = handle; | |
754 | } | |
755 | ||
756 | int device_rename(sd_device *device, const char *name) { | |
757 | _cleanup_free_ char *dirname = NULL; | |
758 | char *new_syspath; | |
759 | const char *interface; | |
760 | int r; | |
761 | ||
762 | assert(device); | |
763 | assert(name); | |
764 | ||
765 | dirname = dirname_malloc(device->syspath); | |
766 | if (!dirname) | |
767 | return -ENOMEM; | |
768 | ||
769 | new_syspath = strjoina(dirname, "/", name); | |
770 | ||
771 | /* the user must trust that the new name is correct */ | |
772 | r = device_set_syspath(device, new_syspath, false); | |
773 | if (r < 0) | |
774 | return r; | |
775 | ||
776 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
777 | if (r >= 0) { | |
778 | r = device_add_property_internal(device, "INTERFACE", name); | |
779 | if (r < 0) | |
780 | return r; | |
781 | ||
782 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ | |
783 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
784 | if (r < 0) | |
785 | return r; | |
786 | } else if (r != -ENOENT) | |
787 | return r; | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
793 | _cleanup_device_unref_ sd_device *ret = NULL; | |
794 | int r; | |
795 | ||
796 | assert(old_device); | |
797 | assert(new_device); | |
798 | ||
799 | r = device_new_aux(&ret); | |
800 | if (r < 0) | |
801 | return r; | |
802 | ||
803 | r = device_set_syspath(ret, old_device->syspath, false); | |
804 | if (r < 0) | |
805 | return r; | |
806 | ||
807 | r = device_set_subsystem(ret, old_device->subsystem); | |
808 | if (r < 0) | |
809 | return r; | |
810 | ||
811 | ret->devnum = old_device->devnum; | |
812 | ||
813 | *new_device = ret; | |
814 | ret = NULL; | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
820 | _cleanup_device_unref_ sd_device *ret = NULL; | |
821 | int r; | |
822 | ||
823 | assert(old_device); | |
824 | assert(new_device); | |
825 | ||
826 | r = device_shallow_clone(old_device, &ret); | |
827 | if (r < 0) | |
828 | return r; | |
829 | ||
830 | r = device_read_db(ret); | |
831 | if (r < 0) | |
832 | return r; | |
833 | ||
834 | ret->sealed = true; | |
835 | ||
836 | *new_device = ret; | |
837 | ret = NULL; | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
843 | _cleanup_device_unref_ sd_device *ret = NULL; | |
844 | int r; | |
845 | ||
846 | assert(new_device); | |
847 | assert(syspath); | |
848 | assert(action); | |
849 | ||
850 | r = sd_device_new_from_syspath(&ret, syspath); | |
851 | if (r < 0) | |
852 | return r; | |
853 | ||
854 | r = device_read_uevent_file(ret); | |
855 | if (r < 0) | |
856 | return r; | |
857 | ||
858 | r = device_add_property_internal(ret, "ACTION", action); | |
859 | if (r < 0) | |
860 | return r; | |
861 | ||
862 | *new_device = ret; | |
863 | ret = NULL; | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { | |
869 | const char *property, *value; | |
870 | int r; | |
871 | ||
872 | assert(device_dst); | |
873 | assert(device_src); | |
874 | ||
875 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
876 | r = device_add_property(device_dst, property, value); | |
877 | if (r < 0) | |
878 | return r; | |
879 | } | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | void device_cleanup_tags(sd_device *device) { | |
885 | assert(device); | |
886 | ||
887 | set_free_free(device->tags); | |
888 | device->tags = NULL; | |
889 | device->property_tags_outdated = true; | |
890 | device->tags_generation ++; | |
891 | } | |
892 | ||
893 | void device_cleanup_devlinks(sd_device *device) { | |
894 | assert(device); | |
895 | ||
896 | set_free_free(device->devlinks); | |
897 | device->devlinks = NULL; | |
898 | device->property_devlinks_outdated = true; | |
899 | device->devlinks_generation ++; | |
900 | } | |
901 | ||
902 | void device_remove_tag(sd_device *device, const char *tag) { | |
903 | assert(device); | |
904 | assert(tag); | |
905 | ||
906 | free(set_remove(device->tags, tag)); | |
907 | device->property_tags_outdated = true; | |
908 | device->tags_generation ++; | |
909 | } | |
910 | ||
911 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
912 | const char *id; | |
913 | char *path; | |
914 | int r; | |
915 | ||
916 | assert(device); | |
917 | assert(tag); | |
918 | ||
919 | r = device_get_id_filename(device, &id); | |
920 | if (r < 0) | |
921 | return r; | |
922 | ||
923 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
924 | ||
925 | if (add) { | |
926 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
927 | if (r < 0) | |
928 | return r; | |
929 | } else { | |
930 | r = unlink(path); | |
931 | if (r < 0 && errno != ENOENT) | |
932 | return -errno; | |
933 | } | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
938 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
939 | const char *tag; | |
940 | int r = 0, k; | |
941 | ||
942 | if (add && device_old) { | |
943 | /* delete possible left-over tags */ | |
944 | FOREACH_DEVICE_TAG(device_old, tag) { | |
945 | if (!sd_device_has_tag(device, tag)) { | |
946 | k = device_tag(device_old, tag, false); | |
947 | if (r >= 0 && k < 0) | |
948 | r = k; | |
949 | } | |
950 | } | |
951 | } | |
952 | ||
953 | FOREACH_DEVICE_TAG(device, tag) { | |
954 | k = device_tag(device, tag, add); | |
955 | if (r >= 0 && k < 0) | |
956 | r = k; | |
957 | } | |
958 | ||
959 | return r; | |
960 | } | |
961 | ||
962 | static bool device_has_info(sd_device *device) { | |
963 | assert(device); | |
964 | ||
965 | if (!set_isempty(device->devlinks)) | |
966 | return true; | |
967 | ||
968 | if (device->devlink_priority != 0) | |
969 | return true; | |
970 | ||
971 | if (!ordered_hashmap_isempty(device->properties_db)) | |
972 | return true; | |
973 | ||
974 | if (!set_isempty(device->tags)) | |
975 | return true; | |
976 | ||
977 | if (device->watch_handle >= 0) | |
978 | return true; | |
979 | ||
980 | return false; | |
981 | } | |
982 | ||
983 | void device_set_db_persist(sd_device *device) { | |
984 | assert(device); | |
985 | ||
986 | device->db_persist = true; | |
987 | } | |
988 | ||
989 | int device_update_db(sd_device *device) { | |
990 | const char *id; | |
991 | char *path; | |
992 | _cleanup_fclose_ FILE *f = NULL; | |
993 | _cleanup_free_ char *path_tmp = NULL; | |
994 | bool has_info; | |
995 | int r; | |
996 | ||
997 | assert(device); | |
998 | ||
999 | has_info = device_has_info(device); | |
1000 | ||
1001 | r = device_get_id_filename(device, &id); | |
1002 | if (r < 0) | |
1003 | return r; | |
1004 | ||
1005 | path = strjoina("/run/udev/data/", id); | |
1006 | ||
1007 | /* do not store anything for otherwise empty devices */ | |
1008 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
1009 | r = unlink(path); | |
1010 | if (r < 0 && errno != ENOENT) | |
1011 | return -errno; | |
1012 | ||
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | /* write a database file */ | |
1017 | r = mkdir_parents(path, 0755); | |
1018 | if (r < 0) | |
1019 | return r; | |
1020 | ||
1021 | r = fopen_temporary(path, &f, &path_tmp); | |
1022 | if (r < 0) | |
1023 | return r; | |
1024 | ||
1025 | /* | |
1026 | * set 'sticky' bit to indicate that we should not clean the | |
1027 | * database when we transition from initramfs to the real root | |
1028 | */ | |
1029 | if (device->db_persist) { | |
1030 | r = fchmod(fileno(f), 01644); | |
1031 | if (r < 0) { | |
1032 | r = -errno; | |
1033 | goto fail; | |
1034 | } | |
1035 | } else { | |
1036 | r = fchmod(fileno(f), 0644); | |
1037 | if (r < 0) { | |
1038 | r = -errno; | |
1039 | goto fail; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | if (has_info) { | |
1044 | const char *property, *value, *tag; | |
1045 | Iterator i; | |
1046 | ||
1047 | if (major(device->devnum) > 0) { | |
1048 | const char *devlink; | |
1049 | ||
1050 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
1051 | fprintf(f, "S:%s\n", devlink + strlen("/dev/")); | |
1052 | ||
1053 | if (device->devlink_priority != 0) | |
1054 | fprintf(f, "L:%i\n", device->devlink_priority); | |
1055 | ||
1056 | if (device->watch_handle >= 0) | |
1057 | fprintf(f, "W:%i\n", device->watch_handle); | |
1058 | } | |
1059 | ||
1060 | if (device->usec_initialized > 0) | |
1061 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
1062 | ||
1063 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
1064 | fprintf(f, "E:%s=%s\n", property, value); | |
1065 | ||
1066 | FOREACH_DEVICE_TAG(device, tag) | |
1067 | fprintf(f, "G:%s\n", tag); | |
1068 | } | |
1069 | ||
1070 | r = fflush_and_check(f); | |
1071 | if (r < 0) | |
1072 | goto fail; | |
1073 | ||
1074 | r = rename(path_tmp, path); | |
1075 | if (r < 0) { | |
1076 | r = -errno; | |
1077 | goto fail; | |
1078 | } | |
1079 | ||
1080 | log_debug("created %s file '%s' for '%s'", has_info ? "db" : "empty", | |
1081 | path, device->devpath); | |
1082 | ||
1083 | return 0; | |
1084 | ||
1085 | fail: | |
dacd6cee LP |
1086 | (void) unlink(path); |
1087 | (void) unlink(path_tmp); | |
57fa1d09 | 1088 | |
dacd6cee | 1089 | return log_error_errno(r, "failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath); |
57fa1d09 TG |
1090 | } |
1091 | ||
1092 | int device_delete_db(sd_device *device) { | |
1093 | const char *id; | |
1094 | char *path; | |
1095 | int r; | |
1096 | ||
1097 | assert(device); | |
1098 | ||
1099 | r = device_get_id_filename(device, &id); | |
1100 | if (r < 0) | |
1101 | return r; | |
1102 | ||
1103 | path = strjoina("/run/udev/data/", id); | |
1104 | ||
1105 | r = unlink(path); | |
1106 | if (r < 0 && errno != ENOENT) | |
1107 | return -errno; | |
1108 | ||
1109 | return 0; | |
1110 | } | |
107f2e25 TG |
1111 | |
1112 | int device_read_db_force(sd_device *device) { | |
1113 | assert(device); | |
1114 | ||
1115 | return device_read_db_aux(device, true); | |
1116 | } |