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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
57fa1d09 TG |
2 | |
3 | #include <ctype.h> | |
57fa1d09 | 4 | #include <net/if.h> |
07630cea | 5 | #include <sys/types.h> |
57fa1d09 TG |
6 | |
7 | #include "sd-device.h" | |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
57fa1d09 TG |
10 | #include "device-internal.h" |
11 | #include "device-private.h" | |
07630cea | 12 | #include "device-util.h" |
3ffd4af2 | 13 | #include "fd-util.h" |
07630cea | 14 | #include "fileio.h" |
f4f15635 | 15 | #include "fs-util.h" |
07630cea LP |
16 | #include "hashmap.h" |
17 | #include "macro.h" | |
18 | #include "mkdir.h" | |
6bedfcbb | 19 | #include "parse-util.h" |
07630cea LP |
20 | #include "path-util.h" |
21 | #include "refcnt.h" | |
22 | #include "set.h" | |
8b43440b | 23 | #include "string-table.h" |
07630cea LP |
24 | #include "string-util.h" |
25 | #include "strv.h" | |
26 | #include "strxcpyx.h" | |
ee104e11 | 27 | #include "user-util.h" |
07630cea | 28 | #include "util.h" |
57fa1d09 TG |
29 | |
30 | int device_add_property(sd_device *device, const char *key, const char *value) { | |
31 | int r; | |
32 | ||
33 | assert(device); | |
34 | assert(key); | |
35 | ||
36 | r = device_add_property_aux(device, key, value, false); | |
37 | if (r < 0) | |
38 | return r; | |
39 | ||
40 | if (key[0] != '.') { | |
41 | r = device_add_property_aux(device, key, value, true); | |
42 | if (r < 0) | |
43 | return r; | |
44 | } | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
50 | _cleanup_free_ char *key = NULL; | |
51 | char *value; | |
52 | ||
53 | assert(device); | |
54 | assert(str); | |
55 | ||
56 | key = strdup(str); | |
57 | if (!key) | |
58 | return -ENOMEM; | |
59 | ||
60 | value = strchr(key, '='); | |
61 | if (!value) | |
62 | return -EINVAL; | |
63 | ||
64 | *value = '\0'; | |
65 | ||
66 | if (isempty(++value)) | |
67 | value = NULL; | |
68 | ||
69 | return device_add_property_internal(device, key, value); | |
70 | } | |
71 | ||
72 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
73 | char *path; | |
74 | int r; | |
75 | ||
76 | assert(device); | |
77 | assert(value); | |
78 | ||
79 | switch (key) { | |
80 | case 'S': | |
81 | path = strjoina("/dev/", value); | |
82 | r = device_add_devlink(device, path); | |
83 | if (r < 0) | |
84 | return r; | |
85 | ||
86 | break; | |
87 | case 'L': | |
88 | r = safe_atoi(value, &device->devlink_priority); | |
89 | if (r < 0) | |
90 | return r; | |
91 | ||
92 | break; | |
93 | case 'E': | |
94 | r = device_add_property_internal_from_string(device, value); | |
95 | if (r < 0) | |
96 | return r; | |
97 | ||
98 | break; | |
99 | case 'G': | |
100 | r = device_add_tag(device, value); | |
101 | if (r < 0) | |
102 | return r; | |
103 | ||
104 | break; | |
105 | case 'W': | |
106 | r = safe_atoi(value, &device->watch_handle); | |
107 | if (r < 0) | |
108 | return r; | |
109 | ||
110 | break; | |
111 | case 'I': | |
112 | r = device_set_usec_initialized(device, value); | |
113 | if (r < 0) | |
114 | return r; | |
115 | ||
116 | break; | |
117 | default: | |
118 | log_debug("device db: unknown key '%c'", key); | |
119 | } | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | void device_set_devlink_priority(sd_device *device, int priority) { | |
125 | assert(device); | |
126 | ||
127 | device->devlink_priority = priority; | |
128 | } | |
129 | ||
130 | void device_set_is_initialized(sd_device *device) { | |
131 | assert(device); | |
132 | ||
133 | device->is_initialized = true; | |
134 | } | |
135 | ||
136 | int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { | |
137 | char num[DECIMAL_STR_MAX(usec_t)]; | |
138 | usec_t usec_initialized; | |
139 | int r; | |
140 | ||
141 | assert(device); | |
142 | ||
143 | if (device_old && device_old->usec_initialized > 0) | |
144 | usec_initialized = device_old->usec_initialized; | |
145 | else | |
146 | usec_initialized = now(CLOCK_MONOTONIC); | |
147 | ||
148 | r = snprintf(num, sizeof(num), USEC_FMT, usec_initialized); | |
149 | if (r < 0) | |
150 | return -errno; | |
151 | ||
152 | r = device_set_usec_initialized(device, num); | |
153 | if (r < 0) | |
154 | return r; | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int device_read_db(sd_device *device) { | |
160 | _cleanup_free_ char *db = NULL; | |
161 | char *path; | |
162 | const char *id, *value; | |
163 | char key; | |
164 | size_t db_len; | |
165 | unsigned i; | |
166 | int r; | |
167 | ||
168 | enum { | |
169 | PRE_KEY, | |
170 | KEY, | |
171 | PRE_VALUE, | |
172 | VALUE, | |
173 | INVALID_LINE, | |
174 | } state = PRE_KEY; | |
175 | ||
176 | assert(device); | |
177 | ||
178 | if (device->db_loaded || device->sealed) | |
179 | return 0; | |
180 | ||
181 | r = device_get_id_filename(device, &id); | |
182 | if (r < 0) | |
183 | return r; | |
184 | ||
185 | path = strjoina("/run/udev/data/", id); | |
186 | ||
187 | r = read_full_file(path, &db, &db_len); | |
188 | if (r < 0) { | |
189 | if (r == -ENOENT) | |
190 | return 0; | |
e53fc357 LP |
191 | else |
192 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
193 | } |
194 | ||
195 | /* devices with a database entry are initialized */ | |
196 | device_set_is_initialized(device); | |
197 | ||
198 | for (i = 0; i < db_len; i++) { | |
199 | switch (state) { | |
200 | case PRE_KEY: | |
201 | if (!strchr(NEWLINE, db[i])) { | |
202 | key = db[i]; | |
203 | ||
204 | state = KEY; | |
205 | } | |
206 | ||
207 | break; | |
208 | case KEY: | |
209 | if (db[i] != ':') { | |
210 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
211 | ||
212 | state = INVALID_LINE; | |
213 | } else { | |
214 | db[i] = '\0'; | |
215 | ||
216 | state = PRE_VALUE; | |
217 | } | |
218 | ||
219 | break; | |
220 | case PRE_VALUE: | |
221 | value = &db[i]; | |
222 | ||
223 | state = VALUE; | |
224 | ||
225 | break; | |
226 | case INVALID_LINE: | |
227 | if (strchr(NEWLINE, db[i])) | |
228 | state = PRE_KEY; | |
229 | ||
230 | break; | |
231 | case VALUE: | |
232 | if (strchr(NEWLINE, db[i])) { | |
233 | db[i] = '\0'; | |
234 | r = handle_db_line(device, key, value); | |
235 | if (r < 0) | |
e53fc357 | 236 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
237 | |
238 | state = PRE_KEY; | |
239 | } | |
240 | ||
241 | break; | |
242 | default: | |
243 | assert_not_reached("invalid state when parsing db"); | |
244 | } | |
245 | } | |
246 | ||
247 | device->db_loaded = true; | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | uint64_t device_get_properties_generation(sd_device *device) { | |
253 | assert(device); | |
254 | ||
255 | return device->properties_generation; | |
256 | } | |
257 | ||
258 | uint64_t device_get_tags_generation(sd_device *device) { | |
259 | assert(device); | |
260 | ||
261 | return device->tags_generation; | |
262 | } | |
263 | ||
264 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
265 | assert(device); | |
266 | ||
267 | return device->devlinks_generation; | |
268 | } | |
269 | ||
270 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
271 | int r; | |
272 | ||
273 | assert(device); | |
274 | assert(mode); | |
275 | ||
276 | r = device_read_db(device); | |
277 | if (r < 0) | |
278 | return r; | |
279 | ||
280 | *mode = device->devmode; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
286 | int r; | |
287 | ||
288 | assert(device); | |
289 | assert(uid); | |
290 | ||
291 | r = device_read_db(device); | |
292 | if (r < 0) | |
293 | return r; | |
294 | ||
295 | *uid = device->devuid; | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | static int device_set_devuid(sd_device *device, const char *uid) { | |
301 | unsigned u; | |
302 | int r; | |
303 | ||
304 | assert(device); | |
305 | assert(uid); | |
306 | ||
307 | r = safe_atou(uid, &u); | |
308 | if (r < 0) | |
309 | return r; | |
310 | ||
311 | r = device_add_property_internal(device, "DEVUID", uid); | |
312 | if (r < 0) | |
313 | return r; | |
314 | ||
315 | device->devuid = u; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
321 | int r; | |
322 | ||
323 | assert(device); | |
324 | assert(gid); | |
325 | ||
326 | r = device_read_db(device); | |
327 | if (r < 0) | |
328 | return r; | |
329 | ||
330 | *gid = device->devgid; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static int device_set_devgid(sd_device *device, const char *gid) { | |
336 | unsigned g; | |
337 | int r; | |
338 | ||
339 | assert(device); | |
340 | assert(gid); | |
341 | ||
342 | r = safe_atou(gid, &g); | |
343 | if (r < 0) | |
344 | return r; | |
345 | ||
346 | r = device_add_property_internal(device, "DEVGID", gid); | |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | device->devgid = g; | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
401cb614 | 355 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
356 | int r; |
357 | ||
358 | assert(device); | |
359 | assert(key); | |
360 | assert(value); | |
361 | ||
362 | if (streq(key, "DEVPATH")) { | |
363 | char *path; | |
364 | ||
365 | path = strjoina("/sys", value); | |
366 | ||
367 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
368 | r = device_set_syspath(device, path, false); | |
369 | if (r < 0) | |
370 | return log_debug_errno(r, "sd-device: could not set syspath to '%s': %m", path); | |
371 | } else if (streq(key, "SUBSYSTEM")) { | |
372 | r = device_set_subsystem(device, value); | |
373 | if (r < 0) | |
374 | return log_debug_errno(r, "sd-device: could not set subsystem to '%s': %m", value); | |
375 | } else if (streq(key, "DEVTYPE")) { | |
376 | r = device_set_devtype(device, value); | |
377 | if (r < 0) | |
378 | return log_debug_errno(r, "sd-device: could not set devtype to '%s': %m", value); | |
379 | } else if (streq(key, "DEVNAME")) { | |
380 | r = device_set_devname(device, value); | |
381 | if (r < 0) | |
382 | return log_debug_errno(r, "sd-device: could not set devname to '%s': %m", value); | |
383 | } else if (streq(key, "USEC_INITIALIZED")) { | |
384 | r = device_set_usec_initialized(device, value); | |
385 | if (r < 0) | |
386 | return log_debug_errno(r, "sd-device: could not set usec-initialized to '%s': %m", value); | |
387 | } else if (streq(key, "DRIVER")) { | |
388 | r = device_set_driver(device, value); | |
389 | if (r < 0) | |
390 | return log_debug_errno(r, "sd-device: could not set driver to '%s': %m", value); | |
391 | } else if (streq(key, "IFINDEX")) { | |
392 | r = device_set_ifindex(device, value); | |
393 | if (r < 0) | |
394 | return log_debug_errno(r, "sd-device: could not set ifindex to '%s': %m", value); | |
395 | } else if (streq(key, "DEVMODE")) { | |
396 | r = device_set_devmode(device, value); | |
397 | if (r < 0) | |
398 | return log_debug_errno(r, "sd-device: could not set devmode to '%s': %m", value); | |
399 | } else if (streq(key, "DEVUID")) { | |
400 | r = device_set_devuid(device, value); | |
401 | if (r < 0) | |
402 | return log_debug_errno(r, "sd-device: could not set devuid to '%s': %m", value); | |
403 | } else if (streq(key, "DEVGID")) { | |
404 | r = device_set_devgid(device, value); | |
405 | if (r < 0) | |
406 | return log_debug_errno(r, "sd-device: could not set devgid to '%s': %m", value); | |
407 | } else if (streq(key, "DEVLINKS")) { | |
4df4fd11 TG |
408 | const char *word, *state; |
409 | size_t l; | |
57fa1d09 | 410 | |
4df4fd11 | 411 | FOREACH_WORD(word, l, value, state) { |
de9b34b6 | 412 | char devlink[l + 1]; |
57fa1d09 | 413 | |
de9b34b6 TG |
414 | strncpy(devlink, word, l); |
415 | devlink[l] = '\0'; | |
57fa1d09 | 416 | |
4df4fd11 | 417 | r = device_add_devlink(device, devlink); |
57fa1d09 | 418 | if (r < 0) |
4df4fd11 | 419 | return log_debug_errno(r, "sd-device: could not add devlink '%s': %m", devlink); |
57fa1d09 TG |
420 | } |
421 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
422 | const char *word, *state; |
423 | size_t l; | |
57fa1d09 | 424 | |
4df4fd11 | 425 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
de9b34b6 | 426 | char tag[l + 1]; |
57fa1d09 | 427 | |
db2f8a2e | 428 | (void) strncpy(tag, word, l); |
de9b34b6 | 429 | tag[l] = '\0'; |
57fa1d09 | 430 | |
4df4fd11 | 431 | r = device_add_tag(device, tag); |
57fa1d09 | 432 | if (r < 0) |
4df4fd11 | 433 | return log_debug_errno(r, "sd-device: could not add tag '%s': %m", tag); |
57fa1d09 TG |
434 | } |
435 | } else { | |
436 | r = device_add_property_internal(device, key, value); | |
437 | if (r < 0) | |
438 | return log_debug_errno(r, "sd-device: could not add property '%s=%s': %m", key, value); | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | static const char* const device_action_table[_DEVICE_ACTION_MAX] = { | |
445 | [DEVICE_ACTION_ADD] = "add", | |
446 | [DEVICE_ACTION_REMOVE] = "remove", | |
447 | [DEVICE_ACTION_CHANGE] = "change", | |
448 | [DEVICE_ACTION_MOVE] = "move", | |
449 | [DEVICE_ACTION_ONLINE] = "online", | |
450 | [DEVICE_ACTION_OFFLINE] = "offline", | |
9a39e1ce LP |
451 | [DEVICE_ACTION_BIND] = "bind", |
452 | [DEVICE_ACTION_UNBIND] = "unbind", | |
57fa1d09 TG |
453 | }; |
454 | ||
455 | DEFINE_STRING_TABLE_LOOKUP(device_action, DeviceAction); | |
456 | ||
457 | static int device_append(sd_device *device, char *key, const char **_major, const char **_minor, uint64_t *_seqnum, | |
458 | DeviceAction *_action) { | |
459 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
460 | uint64_t seqnum = 0; | |
461 | const char *major = NULL, *minor = NULL; | |
462 | char *value; | |
463 | int r; | |
464 | ||
465 | assert(device); | |
466 | assert(key); | |
467 | assert(_major); | |
468 | assert(_minor); | |
469 | assert(_seqnum); | |
470 | assert(_action); | |
471 | ||
472 | value = strchr(key, '='); | |
473 | if (!value) { | |
474 | log_debug("sd-device: not a key-value pair: '%s'", key); | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
478 | *value = '\0'; | |
479 | ||
480 | value++; | |
481 | ||
482 | if (streq(key, "MAJOR")) | |
483 | major = value; | |
484 | else if (streq(key, "MINOR")) | |
485 | minor = value; | |
486 | else { | |
487 | if (streq(key, "ACTION")) { | |
488 | action = device_action_from_string(value); | |
489 | if (action == _DEVICE_ACTION_INVALID) | |
490 | return -EINVAL; | |
491 | } else if (streq(key, "SEQNUM")) { | |
492 | r = safe_atou64(value, &seqnum); | |
493 | if (r < 0) | |
494 | return r; | |
495 | else if (seqnum == 0) | |
496 | /* kernel only sends seqnum > 0 */ | |
497 | return -EINVAL; | |
498 | } | |
499 | ||
401cb614 | 500 | r = device_amend(device, key, value); |
57fa1d09 TG |
501 | if (r < 0) |
502 | return r; | |
503 | } | |
504 | ||
505 | if (major != 0) | |
506 | *_major = major; | |
507 | ||
508 | if (minor != 0) | |
509 | *_minor = minor; | |
510 | ||
511 | if (action != _DEVICE_ACTION_INVALID) | |
512 | *_action = action; | |
513 | ||
514 | if (seqnum > 0) | |
515 | *_seqnum = seqnum; | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | void device_seal(sd_device *device) { | |
521 | assert(device); | |
522 | ||
523 | device->sealed = true; | |
524 | } | |
525 | ||
526 | static int device_verify(sd_device *device, DeviceAction action, uint64_t seqnum) { | |
527 | assert(device); | |
528 | ||
529 | if (!device->devpath || !device->subsystem || action == _DEVICE_ACTION_INVALID || seqnum == 0) { | |
530 | log_debug("sd-device: device created from strv lacks devpath, subsystem, action or seqnum"); | |
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | device->sealed = true; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | int device_new_from_strv(sd_device **ret, char **strv) { | |
4afd3348 | 540 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
541 | char **key; |
542 | const char *major = NULL, *minor = NULL; | |
543 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
544 | uint64_t seqnum; | |
545 | int r; | |
546 | ||
547 | assert(ret); | |
548 | assert(strv); | |
549 | ||
550 | r = device_new_aux(&device); | |
551 | if (r < 0) | |
552 | return r; | |
553 | ||
554 | STRV_FOREACH(key, strv) { | |
555 | r = device_append(device, *key, &major, &minor, &seqnum, &action); | |
556 | if (r < 0) | |
557 | return r; | |
558 | } | |
559 | ||
560 | if (major) { | |
561 | r = device_set_devnum(device, major, minor); | |
562 | if (r < 0) | |
563 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
564 | } | |
565 | ||
566 | r = device_verify(device, action, seqnum); | |
567 | if (r < 0) | |
568 | return r; | |
569 | ||
1cc6c93a | 570 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
571 | |
572 | return 0; | |
573 | } | |
574 | ||
575 | int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { | |
4afd3348 | 576 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
577 | const char *major = NULL, *minor = NULL; |
578 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
579 | uint64_t seqnum; | |
580 | unsigned i = 0; | |
581 | int r; | |
582 | ||
583 | assert(ret); | |
584 | assert(nulstr); | |
585 | assert(len); | |
586 | ||
587 | r = device_new_aux(&device); | |
588 | if (r < 0) | |
589 | return r; | |
590 | ||
591 | while (i < len) { | |
592 | char *key; | |
593 | const char *end; | |
594 | ||
595 | key = (char*)&nulstr[i]; | |
596 | end = memchr(key, '\0', len - i); | |
597 | if (!end) { | |
598 | log_debug("sd-device: failed to parse nulstr"); | |
599 | return -EINVAL; | |
600 | } | |
601 | i += end - key + 1; | |
602 | ||
603 | r = device_append(device, key, &major, &minor, &seqnum, &action); | |
604 | if (r < 0) | |
605 | return r; | |
606 | } | |
607 | ||
608 | if (major) { | |
609 | r = device_set_devnum(device, major, minor); | |
610 | if (r < 0) | |
611 | return log_debug_errno(r, "sd-device: could not set devnum %s:%s: %m", major, minor); | |
612 | } | |
613 | ||
614 | r = device_verify(device, action, seqnum); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
1cc6c93a | 618 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
619 | |
620 | return 0; | |
621 | } | |
622 | ||
623 | static int device_update_properties_bufs(sd_device *device) { | |
624 | const char *val, *prop; | |
ccc1002a TG |
625 | _cleanup_free_ char **buf_strv = NULL; |
626 | _cleanup_free_ uint8_t *buf_nulstr = NULL; | |
d854ba50 | 627 | size_t allocated_nulstr = 0; |
ccc1002a | 628 | size_t nulstr_len = 0, num = 0, i = 0; |
57fa1d09 TG |
629 | |
630 | assert(device); | |
631 | ||
aa20f49a TG |
632 | if (!device->properties_buf_outdated) |
633 | return 0; | |
634 | ||
57fa1d09 TG |
635 | FOREACH_DEVICE_PROPERTY(device, prop, val) { |
636 | size_t len = 0; | |
637 | ||
638 | len = strlen(prop) + 1 + strlen(val); | |
639 | ||
640 | buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); | |
641 | if (!buf_nulstr) | |
642 | return -ENOMEM; | |
643 | ||
57fa1d09 TG |
644 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
645 | nulstr_len += len + 1; | |
d854ba50 | 646 | ++num; |
57fa1d09 TG |
647 | } |
648 | ||
ccc1002a TG |
649 | /* build buf_strv from buf_nulstr */ |
650 | buf_strv = new0(char *, num + 1); | |
651 | if (!buf_strv) | |
652 | return -ENOMEM; | |
d854ba50 | 653 | |
d854ba50 | 654 | NULSTR_FOREACH(val, (char*) buf_nulstr) { |
ccc1002a | 655 | buf_strv[i] = (char *) val; |
d854ba50 MP |
656 | assert(i < num); |
657 | i++; | |
658 | } | |
57fa1d09 | 659 | |
f9ecfd3b | 660 | free_and_replace(device->properties_nulstr, buf_nulstr); |
ccc1002a | 661 | device->properties_nulstr_len = nulstr_len; |
f9ecfd3b | 662 | free_and_replace(device->properties_strv, buf_strv); |
ccc1002a | 663 | |
57fa1d09 TG |
664 | device->properties_buf_outdated = false; |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
670 | int r; | |
671 | ||
672 | assert(device); | |
673 | assert(nulstr); | |
674 | assert(len); | |
675 | ||
aa20f49a TG |
676 | r = device_update_properties_bufs(device); |
677 | if (r < 0) | |
678 | return r; | |
57fa1d09 TG |
679 | |
680 | *nulstr = device->properties_nulstr; | |
681 | *len = device->properties_nulstr_len; | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
687 | int r; | |
688 | ||
689 | assert(device); | |
690 | assert(strv); | |
691 | ||
692 | r = device_update_properties_bufs(device); | |
693 | if (r < 0) | |
694 | return r; | |
695 | ||
696 | *strv = device->properties_strv; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
702 | int r; | |
703 | ||
704 | assert(device); | |
705 | assert(priority); | |
706 | ||
707 | r = device_read_db(device); | |
708 | if (r < 0) | |
709 | return r; | |
710 | ||
711 | *priority = device->devlink_priority; | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | int device_get_watch_handle(sd_device *device, int *handle) { | |
717 | int r; | |
718 | ||
719 | assert(device); | |
720 | assert(handle); | |
721 | ||
722 | r = device_read_db(device); | |
723 | if (r < 0) | |
724 | return r; | |
725 | ||
726 | *handle = device->watch_handle; | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | void device_set_watch_handle(sd_device *device, int handle) { | |
732 | assert(device); | |
733 | ||
734 | device->watch_handle = handle; | |
735 | } | |
736 | ||
737 | int device_rename(sd_device *device, const char *name) { | |
738 | _cleanup_free_ char *dirname = NULL; | |
739 | char *new_syspath; | |
740 | const char *interface; | |
741 | int r; | |
742 | ||
743 | assert(device); | |
744 | assert(name); | |
745 | ||
746 | dirname = dirname_malloc(device->syspath); | |
747 | if (!dirname) | |
748 | return -ENOMEM; | |
749 | ||
750 | new_syspath = strjoina(dirname, "/", name); | |
751 | ||
752 | /* the user must trust that the new name is correct */ | |
753 | r = device_set_syspath(device, new_syspath, false); | |
754 | if (r < 0) | |
755 | return r; | |
756 | ||
757 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
758 | if (r >= 0) { | |
f7b1c8d1 EV |
759 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ |
760 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
57fa1d09 TG |
761 | if (r < 0) |
762 | return r; | |
763 | ||
f7b1c8d1 | 764 | r = device_add_property_internal(device, "INTERFACE", name); |
57fa1d09 TG |
765 | if (r < 0) |
766 | return r; | |
767 | } else if (r != -ENOENT) | |
768 | return r; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 774 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
775 | int r; |
776 | ||
777 | assert(old_device); | |
778 | assert(new_device); | |
779 | ||
780 | r = device_new_aux(&ret); | |
781 | if (r < 0) | |
782 | return r; | |
783 | ||
784 | r = device_set_syspath(ret, old_device->syspath, false); | |
785 | if (r < 0) | |
786 | return r; | |
787 | ||
788 | r = device_set_subsystem(ret, old_device->subsystem); | |
789 | if (r < 0) | |
790 | return r; | |
791 | ||
792 | ret->devnum = old_device->devnum; | |
793 | ||
1cc6c93a | 794 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
795 | |
796 | return 0; | |
797 | } | |
798 | ||
799 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 800 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
801 | int r; |
802 | ||
803 | assert(old_device); | |
804 | assert(new_device); | |
805 | ||
806 | r = device_shallow_clone(old_device, &ret); | |
807 | if (r < 0) | |
808 | return r; | |
809 | ||
810 | r = device_read_db(ret); | |
811 | if (r < 0) | |
812 | return r; | |
813 | ||
814 | ret->sealed = true; | |
815 | ||
1cc6c93a | 816 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
817 | |
818 | return 0; | |
819 | } | |
820 | ||
821 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
4afd3348 | 822 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
823 | int r; |
824 | ||
825 | assert(new_device); | |
826 | assert(syspath); | |
827 | assert(action); | |
828 | ||
829 | r = sd_device_new_from_syspath(&ret, syspath); | |
830 | if (r < 0) | |
831 | return r; | |
832 | ||
833 | r = device_read_uevent_file(ret); | |
834 | if (r < 0) | |
835 | return r; | |
836 | ||
837 | r = device_add_property_internal(ret, "ACTION", action); | |
838 | if (r < 0) | |
839 | return r; | |
840 | ||
1cc6c93a | 841 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
842 | |
843 | return 0; | |
844 | } | |
845 | ||
846 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { | |
847 | const char *property, *value; | |
848 | int r; | |
849 | ||
850 | assert(device_dst); | |
851 | assert(device_src); | |
852 | ||
853 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
854 | r = device_add_property(device_dst, property, value); | |
855 | if (r < 0) | |
856 | return r; | |
857 | } | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | void device_cleanup_tags(sd_device *device) { | |
863 | assert(device); | |
864 | ||
865 | set_free_free(device->tags); | |
866 | device->tags = NULL; | |
867 | device->property_tags_outdated = true; | |
313cefa1 | 868 | device->tags_generation++; |
57fa1d09 TG |
869 | } |
870 | ||
871 | void device_cleanup_devlinks(sd_device *device) { | |
872 | assert(device); | |
873 | ||
874 | set_free_free(device->devlinks); | |
875 | device->devlinks = NULL; | |
876 | device->property_devlinks_outdated = true; | |
313cefa1 | 877 | device->devlinks_generation++; |
57fa1d09 TG |
878 | } |
879 | ||
880 | void device_remove_tag(sd_device *device, const char *tag) { | |
881 | assert(device); | |
882 | assert(tag); | |
883 | ||
884 | free(set_remove(device->tags, tag)); | |
885 | device->property_tags_outdated = true; | |
313cefa1 | 886 | device->tags_generation++; |
57fa1d09 TG |
887 | } |
888 | ||
889 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
890 | const char *id; | |
891 | char *path; | |
892 | int r; | |
893 | ||
894 | assert(device); | |
895 | assert(tag); | |
896 | ||
897 | r = device_get_id_filename(device, &id); | |
898 | if (r < 0) | |
899 | return r; | |
900 | ||
901 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
902 | ||
903 | if (add) { | |
904 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
905 | if (r < 0) | |
906 | return r; | |
907 | } else { | |
908 | r = unlink(path); | |
909 | if (r < 0 && errno != ENOENT) | |
910 | return -errno; | |
911 | } | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
917 | const char *tag; | |
918 | int r = 0, k; | |
919 | ||
920 | if (add && device_old) { | |
921 | /* delete possible left-over tags */ | |
922 | FOREACH_DEVICE_TAG(device_old, tag) { | |
923 | if (!sd_device_has_tag(device, tag)) { | |
924 | k = device_tag(device_old, tag, false); | |
925 | if (r >= 0 && k < 0) | |
926 | r = k; | |
927 | } | |
928 | } | |
929 | } | |
930 | ||
931 | FOREACH_DEVICE_TAG(device, tag) { | |
932 | k = device_tag(device, tag, add); | |
933 | if (r >= 0 && k < 0) | |
934 | r = k; | |
935 | } | |
936 | ||
937 | return r; | |
938 | } | |
939 | ||
940 | static bool device_has_info(sd_device *device) { | |
941 | assert(device); | |
942 | ||
943 | if (!set_isempty(device->devlinks)) | |
944 | return true; | |
945 | ||
946 | if (device->devlink_priority != 0) | |
947 | return true; | |
948 | ||
949 | if (!ordered_hashmap_isempty(device->properties_db)) | |
950 | return true; | |
951 | ||
952 | if (!set_isempty(device->tags)) | |
953 | return true; | |
954 | ||
955 | if (device->watch_handle >= 0) | |
956 | return true; | |
957 | ||
958 | return false; | |
959 | } | |
960 | ||
961 | void device_set_db_persist(sd_device *device) { | |
962 | assert(device); | |
963 | ||
964 | device->db_persist = true; | |
965 | } | |
966 | ||
967 | int device_update_db(sd_device *device) { | |
968 | const char *id; | |
969 | char *path; | |
970 | _cleanup_fclose_ FILE *f = NULL; | |
971 | _cleanup_free_ char *path_tmp = NULL; | |
972 | bool has_info; | |
973 | int r; | |
974 | ||
975 | assert(device); | |
976 | ||
977 | has_info = device_has_info(device); | |
978 | ||
979 | r = device_get_id_filename(device, &id); | |
980 | if (r < 0) | |
981 | return r; | |
982 | ||
983 | path = strjoina("/run/udev/data/", id); | |
984 | ||
985 | /* do not store anything for otherwise empty devices */ | |
986 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
987 | r = unlink(path); | |
988 | if (r < 0 && errno != ENOENT) | |
989 | return -errno; | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | /* write a database file */ | |
995 | r = mkdir_parents(path, 0755); | |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
999 | r = fopen_temporary(path, &f, &path_tmp); | |
1000 | if (r < 0) | |
1001 | return r; | |
1002 | ||
1003 | /* | |
1004 | * set 'sticky' bit to indicate that we should not clean the | |
1005 | * database when we transition from initramfs to the real root | |
1006 | */ | |
1007 | if (device->db_persist) { | |
1008 | r = fchmod(fileno(f), 01644); | |
1009 | if (r < 0) { | |
1010 | r = -errno; | |
1011 | goto fail; | |
1012 | } | |
1013 | } else { | |
1014 | r = fchmod(fileno(f), 0644); | |
1015 | if (r < 0) { | |
1016 | r = -errno; | |
1017 | goto fail; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | if (has_info) { | |
1022 | const char *property, *value, *tag; | |
1023 | Iterator i; | |
1024 | ||
1025 | if (major(device->devnum) > 0) { | |
1026 | const char *devlink; | |
1027 | ||
1028 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
fbd0b64f | 1029 | fprintf(f, "S:%s\n", devlink + STRLEN("/dev/")); |
57fa1d09 TG |
1030 | |
1031 | if (device->devlink_priority != 0) | |
1032 | fprintf(f, "L:%i\n", device->devlink_priority); | |
1033 | ||
1034 | if (device->watch_handle >= 0) | |
1035 | fprintf(f, "W:%i\n", device->watch_handle); | |
1036 | } | |
1037 | ||
1038 | if (device->usec_initialized > 0) | |
1039 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
1040 | ||
1041 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
1042 | fprintf(f, "E:%s=%s\n", property, value); | |
1043 | ||
1044 | FOREACH_DEVICE_TAG(device, tag) | |
1045 | fprintf(f, "G:%s\n", tag); | |
1046 | } | |
1047 | ||
1048 | r = fflush_and_check(f); | |
1049 | if (r < 0) | |
1050 | goto fail; | |
1051 | ||
1052 | r = rename(path_tmp, path); | |
1053 | if (r < 0) { | |
1054 | r = -errno; | |
1055 | goto fail; | |
1056 | } | |
1057 | ||
1058 | log_debug("created %s file '%s' for '%s'", has_info ? "db" : "empty", | |
1059 | path, device->devpath); | |
1060 | ||
1061 | return 0; | |
1062 | ||
1063 | fail: | |
dacd6cee LP |
1064 | (void) unlink(path); |
1065 | (void) unlink(path_tmp); | |
57fa1d09 | 1066 | |
dacd6cee | 1067 | return log_error_errno(r, "failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath); |
57fa1d09 TG |
1068 | } |
1069 | ||
1070 | int device_delete_db(sd_device *device) { | |
1071 | const char *id; | |
1072 | char *path; | |
1073 | int r; | |
1074 | ||
1075 | assert(device); | |
1076 | ||
1077 | r = device_get_id_filename(device, &id); | |
1078 | if (r < 0) | |
1079 | return r; | |
1080 | ||
1081 | path = strjoina("/run/udev/data/", id); | |
1082 | ||
1083 | r = unlink(path); | |
1084 | if (r < 0 && errno != ENOENT) | |
1085 | return -errno; | |
1086 | ||
1087 | return 0; | |
1088 | } | |
107f2e25 TG |
1089 | |
1090 | int device_read_db_force(sd_device *device) { | |
1091 | assert(device); | |
1092 | ||
1093 | return device_read_db_aux(device, true); | |
1094 | } |