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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" | |
e4de7287 | 27 | #include "tmpfile-util.h" |
ee104e11 | 28 | #include "user-util.h" |
07630cea | 29 | #include "util.h" |
57fa1d09 TG |
30 | |
31 | int device_add_property(sd_device *device, const char *key, const char *value) { | |
32 | int r; | |
33 | ||
34 | assert(device); | |
35 | assert(key); | |
36 | ||
37 | r = device_add_property_aux(device, key, value, false); | |
38 | if (r < 0) | |
39 | return r; | |
40 | ||
41 | if (key[0] != '.') { | |
42 | r = device_add_property_aux(device, key, value, true); | |
43 | if (r < 0) | |
44 | return r; | |
45 | } | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
51 | _cleanup_free_ char *key = NULL; | |
52 | char *value; | |
53 | ||
54 | assert(device); | |
55 | assert(str); | |
56 | ||
57 | key = strdup(str); | |
58 | if (!key) | |
59 | return -ENOMEM; | |
60 | ||
61 | value = strchr(key, '='); | |
62 | if (!value) | |
63 | return -EINVAL; | |
64 | ||
65 | *value = '\0'; | |
66 | ||
67 | if (isempty(++value)) | |
68 | value = NULL; | |
69 | ||
70 | return device_add_property_internal(device, key, value); | |
71 | } | |
72 | ||
73 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
74 | char *path; | |
75 | int r; | |
76 | ||
77 | assert(device); | |
78 | assert(value); | |
79 | ||
80 | switch (key) { | |
81 | case 'S': | |
82 | path = strjoina("/dev/", value); | |
83 | r = device_add_devlink(device, path); | |
84 | if (r < 0) | |
85 | return r; | |
86 | ||
87 | break; | |
88 | case 'L': | |
89 | r = safe_atoi(value, &device->devlink_priority); | |
90 | if (r < 0) | |
91 | return r; | |
92 | ||
93 | break; | |
94 | case 'E': | |
95 | r = device_add_property_internal_from_string(device, value); | |
96 | if (r < 0) | |
97 | return r; | |
98 | ||
99 | break; | |
100 | case 'G': | |
101 | r = device_add_tag(device, value); | |
102 | if (r < 0) | |
103 | return r; | |
104 | ||
105 | break; | |
106 | case 'W': | |
107 | r = safe_atoi(value, &device->watch_handle); | |
108 | if (r < 0) | |
109 | return r; | |
110 | ||
111 | break; | |
112 | case 'I': | |
113 | r = device_set_usec_initialized(device, value); | |
114 | if (r < 0) | |
115 | return r; | |
116 | ||
117 | break; | |
118 | default: | |
c7d54dae | 119 | log_device_debug(device, "sd-device: Unknown key '%c' in device db, ignoring", key); |
57fa1d09 TG |
120 | } |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | void device_set_devlink_priority(sd_device *device, int priority) { | |
126 | assert(device); | |
127 | ||
128 | device->devlink_priority = priority; | |
129 | } | |
130 | ||
131 | void device_set_is_initialized(sd_device *device) { | |
132 | assert(device); | |
133 | ||
134 | device->is_initialized = true; | |
135 | } | |
136 | ||
137 | int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) { | |
138 | char num[DECIMAL_STR_MAX(usec_t)]; | |
139 | usec_t usec_initialized; | |
140 | int r; | |
141 | ||
142 | assert(device); | |
143 | ||
144 | if (device_old && device_old->usec_initialized > 0) | |
145 | usec_initialized = device_old->usec_initialized; | |
146 | else | |
147 | usec_initialized = now(CLOCK_MONOTONIC); | |
148 | ||
149 | r = snprintf(num, sizeof(num), USEC_FMT, usec_initialized); | |
150 | if (r < 0) | |
151 | return -errno; | |
152 | ||
153 | r = device_set_usec_initialized(device, num); | |
154 | if (r < 0) | |
155 | return r; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int device_read_db(sd_device *device) { | |
161 | _cleanup_free_ char *db = NULL; | |
162 | char *path; | |
163 | const char *id, *value; | |
164 | char key; | |
165 | size_t db_len; | |
166 | unsigned i; | |
167 | int r; | |
168 | ||
169 | enum { | |
170 | PRE_KEY, | |
171 | KEY, | |
172 | PRE_VALUE, | |
173 | VALUE, | |
174 | INVALID_LINE, | |
175 | } state = PRE_KEY; | |
176 | ||
177 | assert(device); | |
178 | ||
179 | if (device->db_loaded || device->sealed) | |
180 | return 0; | |
181 | ||
182 | r = device_get_id_filename(device, &id); | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | path = strjoina("/run/udev/data/", id); | |
187 | ||
188 | r = read_full_file(path, &db, &db_len); | |
189 | if (r < 0) { | |
190 | if (r == -ENOENT) | |
191 | return 0; | |
e53fc357 | 192 | else |
c7d54dae | 193 | return log_device_debug_errno(device, r, "sd-device: Failed to read db '%s': %m", path); |
57fa1d09 TG |
194 | } |
195 | ||
196 | /* devices with a database entry are initialized */ | |
197 | device_set_is_initialized(device); | |
198 | ||
199 | for (i = 0; i < db_len; i++) { | |
200 | switch (state) { | |
201 | case PRE_KEY: | |
202 | if (!strchr(NEWLINE, db[i])) { | |
203 | key = db[i]; | |
204 | ||
205 | state = KEY; | |
206 | } | |
207 | ||
208 | break; | |
209 | case KEY: | |
210 | if (db[i] != ':') { | |
c7d54dae | 211 | log_device_debug(device, "sd-device: Invalid db entry with key '%c', ignoring", key); |
57fa1d09 TG |
212 | |
213 | state = INVALID_LINE; | |
214 | } else { | |
215 | db[i] = '\0'; | |
216 | ||
217 | state = PRE_VALUE; | |
218 | } | |
219 | ||
220 | break; | |
221 | case PRE_VALUE: | |
222 | value = &db[i]; | |
223 | ||
224 | state = VALUE; | |
225 | ||
226 | break; | |
227 | case INVALID_LINE: | |
228 | if (strchr(NEWLINE, db[i])) | |
229 | state = PRE_KEY; | |
230 | ||
231 | break; | |
232 | case VALUE: | |
233 | if (strchr(NEWLINE, db[i])) { | |
234 | db[i] = '\0'; | |
235 | r = handle_db_line(device, key, value); | |
236 | if (r < 0) | |
c7d54dae | 237 | log_device_debug_errno(device, r, "sd-device: Failed to handle db entry '%c:%s', ignoring: %m", key, value); |
57fa1d09 TG |
238 | |
239 | state = PRE_KEY; | |
240 | } | |
241 | ||
242 | break; | |
243 | default: | |
c7d54dae | 244 | assert_not_reached("Invalid state when parsing db"); |
57fa1d09 TG |
245 | } |
246 | } | |
247 | ||
248 | device->db_loaded = true; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | uint64_t device_get_properties_generation(sd_device *device) { | |
254 | assert(device); | |
255 | ||
256 | return device->properties_generation; | |
257 | } | |
258 | ||
259 | uint64_t device_get_tags_generation(sd_device *device) { | |
260 | assert(device); | |
261 | ||
262 | return device->tags_generation; | |
263 | } | |
264 | ||
265 | uint64_t device_get_devlinks_generation(sd_device *device) { | |
266 | assert(device); | |
267 | ||
268 | return device->devlinks_generation; | |
269 | } | |
270 | ||
271 | int device_get_devnode_mode(sd_device *device, mode_t *mode) { | |
272 | int r; | |
273 | ||
274 | assert(device); | |
57fa1d09 TG |
275 | |
276 | r = device_read_db(device); | |
277 | if (r < 0) | |
278 | return r; | |
279 | ||
dcfbde3a YW |
280 | if (device->devmode == (mode_t) -1) |
281 | return -ENOENT; | |
282 | ||
78ffb476 YW |
283 | if (mode) |
284 | *mode = device->devmode; | |
57fa1d09 TG |
285 | |
286 | return 0; | |
287 | } | |
288 | ||
289 | int device_get_devnode_uid(sd_device *device, uid_t *uid) { | |
290 | int r; | |
291 | ||
292 | assert(device); | |
57fa1d09 TG |
293 | |
294 | r = device_read_db(device); | |
295 | if (r < 0) | |
296 | return r; | |
297 | ||
dcfbde3a YW |
298 | if (device->devuid == (uid_t) -1) |
299 | return -ENOENT; | |
300 | ||
78ffb476 YW |
301 | if (uid) |
302 | *uid = device->devuid; | |
57fa1d09 TG |
303 | |
304 | return 0; | |
305 | } | |
306 | ||
307 | static int device_set_devuid(sd_device *device, const char *uid) { | |
308 | unsigned u; | |
309 | int r; | |
310 | ||
311 | assert(device); | |
312 | assert(uid); | |
313 | ||
314 | r = safe_atou(uid, &u); | |
315 | if (r < 0) | |
316 | return r; | |
317 | ||
318 | r = device_add_property_internal(device, "DEVUID", uid); | |
319 | if (r < 0) | |
320 | return r; | |
321 | ||
322 | device->devuid = u; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | int device_get_devnode_gid(sd_device *device, gid_t *gid) { | |
328 | int r; | |
329 | ||
330 | assert(device); | |
57fa1d09 TG |
331 | |
332 | r = device_read_db(device); | |
333 | if (r < 0) | |
334 | return r; | |
335 | ||
dcfbde3a YW |
336 | if (device->devgid == (gid_t) -1) |
337 | return -ENOENT; | |
338 | ||
78ffb476 YW |
339 | if (gid) |
340 | *gid = device->devgid; | |
57fa1d09 TG |
341 | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static int device_set_devgid(sd_device *device, const char *gid) { | |
346 | unsigned g; | |
347 | int r; | |
348 | ||
349 | assert(device); | |
350 | assert(gid); | |
351 | ||
352 | r = safe_atou(gid, &g); | |
353 | if (r < 0) | |
354 | return r; | |
355 | ||
356 | r = device_add_property_internal(device, "DEVGID", gid); | |
357 | if (r < 0) | |
358 | return r; | |
359 | ||
360 | device->devgid = g; | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
401cb614 | 365 | static int device_amend(sd_device *device, const char *key, const char *value) { |
57fa1d09 TG |
366 | int r; |
367 | ||
368 | assert(device); | |
369 | assert(key); | |
370 | assert(value); | |
371 | ||
372 | if (streq(key, "DEVPATH")) { | |
373 | char *path; | |
374 | ||
375 | path = strjoina("/sys", value); | |
376 | ||
377 | /* the caller must verify or trust this data (e.g., if it comes from the kernel) */ | |
378 | r = device_set_syspath(device, path, false); | |
379 | if (r < 0) | |
c7d54dae | 380 | return log_device_debug_errno(device, r, "sd-device: Failed to set syspath to '%s': %m", path); |
57fa1d09 TG |
381 | } else if (streq(key, "SUBSYSTEM")) { |
382 | r = device_set_subsystem(device, value); | |
383 | if (r < 0) | |
c7d54dae | 384 | return log_device_debug_errno(device, r, "sd-device: Failed to set subsystem to '%s': %m", value); |
57fa1d09 TG |
385 | } else if (streq(key, "DEVTYPE")) { |
386 | r = device_set_devtype(device, value); | |
387 | if (r < 0) | |
c7d54dae | 388 | return log_device_debug_errno(device, r, "sd-device: Failed to set devtype to '%s': %m", value); |
57fa1d09 TG |
389 | } else if (streq(key, "DEVNAME")) { |
390 | r = device_set_devname(device, value); | |
391 | if (r < 0) | |
c7d54dae | 392 | return log_device_debug_errno(device, r, "sd-device: Failed to set devname to '%s': %m", value); |
57fa1d09 TG |
393 | } else if (streq(key, "USEC_INITIALIZED")) { |
394 | r = device_set_usec_initialized(device, value); | |
395 | if (r < 0) | |
c7d54dae | 396 | return log_device_debug_errno(device, r, "sd-device: Failed to set usec-initialized to '%s': %m", value); |
57fa1d09 TG |
397 | } else if (streq(key, "DRIVER")) { |
398 | r = device_set_driver(device, value); | |
399 | if (r < 0) | |
c7d54dae | 400 | return log_device_debug_errno(device, r, "sd-device: Failed to set driver to '%s': %m", value); |
57fa1d09 TG |
401 | } else if (streq(key, "IFINDEX")) { |
402 | r = device_set_ifindex(device, value); | |
403 | if (r < 0) | |
c7d54dae | 404 | return log_device_debug_errno(device, r, "sd-device: Failed to set ifindex to '%s': %m", value); |
57fa1d09 TG |
405 | } else if (streq(key, "DEVMODE")) { |
406 | r = device_set_devmode(device, value); | |
407 | if (r < 0) | |
c7d54dae | 408 | return log_device_debug_errno(device, r, "sd-device: Failed to set devmode to '%s': %m", value); |
57fa1d09 TG |
409 | } else if (streq(key, "DEVUID")) { |
410 | r = device_set_devuid(device, value); | |
411 | if (r < 0) | |
c7d54dae | 412 | return log_device_debug_errno(device, r, "sd-device: Failed to set devuid to '%s': %m", value); |
57fa1d09 TG |
413 | } else if (streq(key, "DEVGID")) { |
414 | r = device_set_devgid(device, value); | |
415 | if (r < 0) | |
c7d54dae | 416 | return log_device_debug_errno(device, r, "sd-device: Failed to set devgid to '%s': %m", value); |
57fa1d09 | 417 | } else if (streq(key, "DEVLINKS")) { |
4df4fd11 TG |
418 | const char *word, *state; |
419 | size_t l; | |
57fa1d09 | 420 | |
4df4fd11 | 421 | FOREACH_WORD(word, l, value, state) { |
de9b34b6 | 422 | char devlink[l + 1]; |
57fa1d09 | 423 | |
de9b34b6 TG |
424 | strncpy(devlink, word, l); |
425 | devlink[l] = '\0'; | |
57fa1d09 | 426 | |
4df4fd11 | 427 | r = device_add_devlink(device, devlink); |
57fa1d09 | 428 | if (r < 0) |
c7d54dae | 429 | return log_device_debug_errno(device, r, "sd-device: Failed to add devlink '%s': %m", devlink); |
57fa1d09 TG |
430 | } |
431 | } else if (streq(key, "TAGS")) { | |
4df4fd11 TG |
432 | const char *word, *state; |
433 | size_t l; | |
57fa1d09 | 434 | |
4df4fd11 | 435 | FOREACH_WORD_SEPARATOR(word, l, value, ":", state) { |
de9b34b6 | 436 | char tag[l + 1]; |
57fa1d09 | 437 | |
db2f8a2e | 438 | (void) strncpy(tag, word, l); |
de9b34b6 | 439 | tag[l] = '\0'; |
57fa1d09 | 440 | |
4df4fd11 | 441 | r = device_add_tag(device, tag); |
57fa1d09 | 442 | if (r < 0) |
c7d54dae | 443 | return log_device_debug_errno(device, r, "sd-device: Failed to add tag '%s': %m", tag); |
57fa1d09 TG |
444 | } |
445 | } else { | |
446 | r = device_add_property_internal(device, key, value); | |
447 | if (r < 0) | |
c7d54dae | 448 | return log_device_debug_errno(device, r, "sd-device: Failed to add property '%s=%s': %m", key, value); |
57fa1d09 TG |
449 | } |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static const char* const device_action_table[_DEVICE_ACTION_MAX] = { | |
455 | [DEVICE_ACTION_ADD] = "add", | |
456 | [DEVICE_ACTION_REMOVE] = "remove", | |
457 | [DEVICE_ACTION_CHANGE] = "change", | |
458 | [DEVICE_ACTION_MOVE] = "move", | |
459 | [DEVICE_ACTION_ONLINE] = "online", | |
460 | [DEVICE_ACTION_OFFLINE] = "offline", | |
9a39e1ce LP |
461 | [DEVICE_ACTION_BIND] = "bind", |
462 | [DEVICE_ACTION_UNBIND] = "unbind", | |
57fa1d09 TG |
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) { | |
c7d54dae | 484 | log_device_debug(device, "sd-device: Not a key-value pair: '%s'", key); |
57fa1d09 TG |
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) { | |
c7d54dae | 540 | log_device_debug(device, "sd-device: Device created from strv or nulstr lacks devpath, subsystem, action or seqnum."); |
57fa1d09 TG |
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) { | |
4afd3348 | 550 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
551 | char **key; |
552 | const char *major = NULL, *minor = NULL; | |
553 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
8d578a2e | 554 | uint64_t seqnum = 0; |
57fa1d09 TG |
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) | |
c7d54dae | 573 | return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor); |
57fa1d09 TG |
574 | } |
575 | ||
576 | r = device_verify(device, action, seqnum); | |
577 | if (r < 0) | |
578 | return r; | |
579 | ||
1cc6c93a | 580 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
581 | |
582 | return 0; | |
583 | } | |
584 | ||
585 | int device_new_from_nulstr(sd_device **ret, uint8_t *nulstr, size_t len) { | |
4afd3348 | 586 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
587 | const char *major = NULL, *minor = NULL; |
588 | DeviceAction action = _DEVICE_ACTION_INVALID; | |
8d578a2e | 589 | uint64_t seqnum = 0; |
57fa1d09 TG |
590 | unsigned i = 0; |
591 | int r; | |
592 | ||
593 | assert(ret); | |
594 | assert(nulstr); | |
595 | assert(len); | |
596 | ||
597 | r = device_new_aux(&device); | |
598 | if (r < 0) | |
599 | return r; | |
600 | ||
601 | while (i < len) { | |
602 | char *key; | |
603 | const char *end; | |
604 | ||
605 | key = (char*)&nulstr[i]; | |
606 | end = memchr(key, '\0', len - i); | |
607 | if (!end) { | |
c7d54dae | 608 | log_device_debug(device, "sd-device: Failed to parse nulstr"); |
57fa1d09 TG |
609 | return -EINVAL; |
610 | } | |
611 | i += end - key + 1; | |
612 | ||
613 | r = device_append(device, key, &major, &minor, &seqnum, &action); | |
614 | if (r < 0) | |
615 | return r; | |
616 | } | |
617 | ||
618 | if (major) { | |
619 | r = device_set_devnum(device, major, minor); | |
620 | if (r < 0) | |
c7d54dae | 621 | return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor); |
57fa1d09 TG |
622 | } |
623 | ||
624 | r = device_verify(device, action, seqnum); | |
625 | if (r < 0) | |
626 | return r; | |
627 | ||
1cc6c93a | 628 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
629 | |
630 | return 0; | |
631 | } | |
632 | ||
633 | static int device_update_properties_bufs(sd_device *device) { | |
634 | const char *val, *prop; | |
ccc1002a TG |
635 | _cleanup_free_ char **buf_strv = NULL; |
636 | _cleanup_free_ uint8_t *buf_nulstr = NULL; | |
d854ba50 | 637 | size_t allocated_nulstr = 0; |
ccc1002a | 638 | size_t nulstr_len = 0, num = 0, i = 0; |
57fa1d09 TG |
639 | |
640 | assert(device); | |
641 | ||
aa20f49a TG |
642 | if (!device->properties_buf_outdated) |
643 | return 0; | |
644 | ||
57fa1d09 TG |
645 | FOREACH_DEVICE_PROPERTY(device, prop, val) { |
646 | size_t len = 0; | |
647 | ||
648 | len = strlen(prop) + 1 + strlen(val); | |
649 | ||
650 | buf_nulstr = GREEDY_REALLOC0(buf_nulstr, allocated_nulstr, nulstr_len + len + 2); | |
651 | if (!buf_nulstr) | |
652 | return -ENOMEM; | |
653 | ||
57fa1d09 TG |
654 | strscpyl((char *)buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL); |
655 | nulstr_len += len + 1; | |
d854ba50 | 656 | ++num; |
57fa1d09 TG |
657 | } |
658 | ||
ccc1002a TG |
659 | /* build buf_strv from buf_nulstr */ |
660 | buf_strv = new0(char *, num + 1); | |
661 | if (!buf_strv) | |
662 | return -ENOMEM; | |
d854ba50 | 663 | |
d854ba50 | 664 | NULSTR_FOREACH(val, (char*) buf_nulstr) { |
ccc1002a | 665 | buf_strv[i] = (char *) val; |
d854ba50 MP |
666 | assert(i < num); |
667 | i++; | |
668 | } | |
57fa1d09 | 669 | |
f9ecfd3b | 670 | free_and_replace(device->properties_nulstr, buf_nulstr); |
ccc1002a | 671 | device->properties_nulstr_len = nulstr_len; |
f9ecfd3b | 672 | free_and_replace(device->properties_strv, buf_strv); |
ccc1002a | 673 | |
57fa1d09 TG |
674 | device->properties_buf_outdated = false; |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | int device_get_properties_nulstr(sd_device *device, const uint8_t **nulstr, size_t *len) { | |
680 | int r; | |
681 | ||
682 | assert(device); | |
683 | assert(nulstr); | |
684 | assert(len); | |
685 | ||
aa20f49a TG |
686 | r = device_update_properties_bufs(device); |
687 | if (r < 0) | |
688 | return r; | |
57fa1d09 TG |
689 | |
690 | *nulstr = device->properties_nulstr; | |
691 | *len = device->properties_nulstr_len; | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | int device_get_properties_strv(sd_device *device, char ***strv) { | |
697 | int r; | |
698 | ||
699 | assert(device); | |
700 | assert(strv); | |
701 | ||
702 | r = device_update_properties_bufs(device); | |
703 | if (r < 0) | |
704 | return r; | |
705 | ||
706 | *strv = device->properties_strv; | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | int device_get_devlink_priority(sd_device *device, int *priority) { | |
712 | int r; | |
713 | ||
714 | assert(device); | |
715 | assert(priority); | |
716 | ||
717 | r = device_read_db(device); | |
718 | if (r < 0) | |
719 | return r; | |
720 | ||
721 | *priority = device->devlink_priority; | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | int device_get_watch_handle(sd_device *device, int *handle) { | |
727 | int r; | |
728 | ||
729 | assert(device); | |
57fa1d09 TG |
730 | |
731 | r = device_read_db(device); | |
732 | if (r < 0) | |
733 | return r; | |
734 | ||
dcfbde3a YW |
735 | if (device->watch_handle < 0) |
736 | return -ENOENT; | |
737 | ||
78ffb476 YW |
738 | if (handle) |
739 | *handle = device->watch_handle; | |
57fa1d09 TG |
740 | |
741 | return 0; | |
742 | } | |
743 | ||
744 | void device_set_watch_handle(sd_device *device, int handle) { | |
745 | assert(device); | |
746 | ||
747 | device->watch_handle = handle; | |
748 | } | |
749 | ||
750 | int device_rename(sd_device *device, const char *name) { | |
751 | _cleanup_free_ char *dirname = NULL; | |
752 | char *new_syspath; | |
753 | const char *interface; | |
754 | int r; | |
755 | ||
756 | assert(device); | |
757 | assert(name); | |
758 | ||
759 | dirname = dirname_malloc(device->syspath); | |
760 | if (!dirname) | |
761 | return -ENOMEM; | |
762 | ||
763 | new_syspath = strjoina(dirname, "/", name); | |
764 | ||
765 | /* the user must trust that the new name is correct */ | |
766 | r = device_set_syspath(device, new_syspath, false); | |
767 | if (r < 0) | |
768 | return r; | |
769 | ||
770 | r = sd_device_get_property_value(device, "INTERFACE", &interface); | |
771 | if (r >= 0) { | |
f7b1c8d1 EV |
772 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ |
773 | r = device_add_property_internal(device, "INTERFACE_OLD", interface); | |
57fa1d09 TG |
774 | if (r < 0) |
775 | return r; | |
776 | ||
f7b1c8d1 | 777 | r = device_add_property_internal(device, "INTERFACE", name); |
57fa1d09 TG |
778 | if (r < 0) |
779 | return r; | |
780 | } else if (r != -ENOENT) | |
781 | return r; | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | int device_shallow_clone(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 787 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
788 | int r; |
789 | ||
790 | assert(old_device); | |
791 | assert(new_device); | |
792 | ||
793 | r = device_new_aux(&ret); | |
794 | if (r < 0) | |
795 | return r; | |
796 | ||
797 | r = device_set_syspath(ret, old_device->syspath, false); | |
798 | if (r < 0) | |
799 | return r; | |
800 | ||
801 | r = device_set_subsystem(ret, old_device->subsystem); | |
802 | if (r < 0) | |
803 | return r; | |
804 | ||
805 | ret->devnum = old_device->devnum; | |
806 | ||
1cc6c93a | 807 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
808 | |
809 | return 0; | |
810 | } | |
811 | ||
812 | int device_clone_with_db(sd_device *old_device, sd_device **new_device) { | |
4afd3348 | 813 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
814 | int r; |
815 | ||
816 | assert(old_device); | |
817 | assert(new_device); | |
818 | ||
819 | r = device_shallow_clone(old_device, &ret); | |
820 | if (r < 0) | |
821 | return r; | |
822 | ||
823 | r = device_read_db(ret); | |
824 | if (r < 0) | |
825 | return r; | |
826 | ||
827 | ret->sealed = true; | |
828 | ||
1cc6c93a | 829 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
830 | |
831 | return 0; | |
832 | } | |
833 | ||
834 | int device_new_from_synthetic_event(sd_device **new_device, const char *syspath, const char *action) { | |
4afd3348 | 835 | _cleanup_(sd_device_unrefp) sd_device *ret = NULL; |
57fa1d09 TG |
836 | int r; |
837 | ||
838 | assert(new_device); | |
839 | assert(syspath); | |
840 | assert(action); | |
841 | ||
842 | r = sd_device_new_from_syspath(&ret, syspath); | |
843 | if (r < 0) | |
844 | return r; | |
845 | ||
846 | r = device_read_uevent_file(ret); | |
847 | if (r < 0) | |
848 | return r; | |
849 | ||
850 | r = device_add_property_internal(ret, "ACTION", action); | |
851 | if (r < 0) | |
852 | return r; | |
853 | ||
1cc6c93a | 854 | *new_device = TAKE_PTR(ret); |
57fa1d09 TG |
855 | |
856 | return 0; | |
857 | } | |
858 | ||
ad5944d7 YW |
859 | int device_new_from_stat_rdev(sd_device **ret, const struct stat *st) { |
860 | char type; | |
861 | ||
862 | assert(ret); | |
863 | assert(st); | |
864 | ||
865 | if (S_ISBLK(st->st_mode)) | |
866 | type = 'b'; | |
867 | else if (S_ISCHR(st->st_mode)) | |
868 | type = 'c'; | |
869 | else | |
870 | return -ENOTTY; | |
871 | ||
872 | return sd_device_new_from_devnum(ret, type, st->st_rdev); | |
873 | } | |
874 | ||
57fa1d09 TG |
875 | int device_copy_properties(sd_device *device_dst, sd_device *device_src) { |
876 | const char *property, *value; | |
877 | int r; | |
878 | ||
879 | assert(device_dst); | |
880 | assert(device_src); | |
881 | ||
882 | FOREACH_DEVICE_PROPERTY(device_src, property, value) { | |
883 | r = device_add_property(device_dst, property, value); | |
884 | if (r < 0) | |
885 | return r; | |
886 | } | |
887 | ||
888 | return 0; | |
889 | } | |
890 | ||
891 | void device_cleanup_tags(sd_device *device) { | |
892 | assert(device); | |
893 | ||
894 | set_free_free(device->tags); | |
895 | device->tags = NULL; | |
896 | device->property_tags_outdated = true; | |
313cefa1 | 897 | device->tags_generation++; |
57fa1d09 TG |
898 | } |
899 | ||
900 | void device_cleanup_devlinks(sd_device *device) { | |
901 | assert(device); | |
902 | ||
903 | set_free_free(device->devlinks); | |
904 | device->devlinks = NULL; | |
905 | device->property_devlinks_outdated = true; | |
313cefa1 | 906 | device->devlinks_generation++; |
57fa1d09 TG |
907 | } |
908 | ||
909 | void device_remove_tag(sd_device *device, const char *tag) { | |
910 | assert(device); | |
911 | assert(tag); | |
912 | ||
913 | free(set_remove(device->tags, tag)); | |
914 | device->property_tags_outdated = true; | |
313cefa1 | 915 | device->tags_generation++; |
57fa1d09 TG |
916 | } |
917 | ||
918 | static int device_tag(sd_device *device, const char *tag, bool add) { | |
919 | const char *id; | |
920 | char *path; | |
921 | int r; | |
922 | ||
923 | assert(device); | |
924 | assert(tag); | |
925 | ||
926 | r = device_get_id_filename(device, &id); | |
927 | if (r < 0) | |
928 | return r; | |
929 | ||
930 | path = strjoina("/run/udev/tags/", tag, "/", id); | |
931 | ||
932 | if (add) { | |
933 | r = touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444); | |
934 | if (r < 0) | |
935 | return r; | |
936 | } else { | |
937 | r = unlink(path); | |
938 | if (r < 0 && errno != ENOENT) | |
939 | return -errno; | |
940 | } | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | int device_tag_index(sd_device *device, sd_device *device_old, bool add) { | |
946 | const char *tag; | |
947 | int r = 0, k; | |
948 | ||
949 | if (add && device_old) { | |
950 | /* delete possible left-over tags */ | |
951 | FOREACH_DEVICE_TAG(device_old, tag) { | |
952 | if (!sd_device_has_tag(device, tag)) { | |
953 | k = device_tag(device_old, tag, false); | |
954 | if (r >= 0 && k < 0) | |
955 | r = k; | |
956 | } | |
957 | } | |
958 | } | |
959 | ||
960 | FOREACH_DEVICE_TAG(device, tag) { | |
961 | k = device_tag(device, tag, add); | |
962 | if (r >= 0 && k < 0) | |
963 | r = k; | |
964 | } | |
965 | ||
966 | return r; | |
967 | } | |
968 | ||
969 | static bool device_has_info(sd_device *device) { | |
970 | assert(device); | |
971 | ||
972 | if (!set_isempty(device->devlinks)) | |
973 | return true; | |
974 | ||
975 | if (device->devlink_priority != 0) | |
976 | return true; | |
977 | ||
978 | if (!ordered_hashmap_isempty(device->properties_db)) | |
979 | return true; | |
980 | ||
981 | if (!set_isempty(device->tags)) | |
982 | return true; | |
983 | ||
984 | if (device->watch_handle >= 0) | |
985 | return true; | |
986 | ||
987 | return false; | |
988 | } | |
989 | ||
990 | void device_set_db_persist(sd_device *device) { | |
991 | assert(device); | |
992 | ||
993 | device->db_persist = true; | |
994 | } | |
995 | ||
996 | int device_update_db(sd_device *device) { | |
997 | const char *id; | |
998 | char *path; | |
999 | _cleanup_fclose_ FILE *f = NULL; | |
1000 | _cleanup_free_ char *path_tmp = NULL; | |
1001 | bool has_info; | |
1002 | int r; | |
1003 | ||
1004 | assert(device); | |
1005 | ||
1006 | has_info = device_has_info(device); | |
1007 | ||
1008 | r = device_get_id_filename(device, &id); | |
1009 | if (r < 0) | |
1010 | return r; | |
1011 | ||
1012 | path = strjoina("/run/udev/data/", id); | |
1013 | ||
1014 | /* do not store anything for otherwise empty devices */ | |
1015 | if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) { | |
1016 | r = unlink(path); | |
1017 | if (r < 0 && errno != ENOENT) | |
1018 | return -errno; | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | /* write a database file */ | |
1024 | r = mkdir_parents(path, 0755); | |
1025 | if (r < 0) | |
1026 | return r; | |
1027 | ||
1028 | r = fopen_temporary(path, &f, &path_tmp); | |
1029 | if (r < 0) | |
1030 | return r; | |
1031 | ||
1032 | /* | |
1033 | * set 'sticky' bit to indicate that we should not clean the | |
1034 | * database when we transition from initramfs to the real root | |
1035 | */ | |
1036 | if (device->db_persist) { | |
1037 | r = fchmod(fileno(f), 01644); | |
1038 | if (r < 0) { | |
1039 | r = -errno; | |
1040 | goto fail; | |
1041 | } | |
1042 | } else { | |
1043 | r = fchmod(fileno(f), 0644); | |
1044 | if (r < 0) { | |
1045 | r = -errno; | |
1046 | goto fail; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | if (has_info) { | |
1051 | const char *property, *value, *tag; | |
1052 | Iterator i; | |
1053 | ||
1054 | if (major(device->devnum) > 0) { | |
1055 | const char *devlink; | |
1056 | ||
1057 | FOREACH_DEVICE_DEVLINK(device, devlink) | |
fbd0b64f | 1058 | fprintf(f, "S:%s\n", devlink + STRLEN("/dev/")); |
57fa1d09 TG |
1059 | |
1060 | if (device->devlink_priority != 0) | |
1061 | fprintf(f, "L:%i\n", device->devlink_priority); | |
1062 | ||
1063 | if (device->watch_handle >= 0) | |
1064 | fprintf(f, "W:%i\n", device->watch_handle); | |
1065 | } | |
1066 | ||
1067 | if (device->usec_initialized > 0) | |
1068 | fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized); | |
1069 | ||
1070 | ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db, i) | |
1071 | fprintf(f, "E:%s=%s\n", property, value); | |
1072 | ||
1073 | FOREACH_DEVICE_TAG(device, tag) | |
1074 | fprintf(f, "G:%s\n", tag); | |
1075 | } | |
1076 | ||
1077 | r = fflush_and_check(f); | |
1078 | if (r < 0) | |
1079 | goto fail; | |
1080 | ||
1081 | r = rename(path_tmp, path); | |
1082 | if (r < 0) { | |
1083 | r = -errno; | |
1084 | goto fail; | |
1085 | } | |
1086 | ||
c7d54dae YW |
1087 | log_device_debug(device, "sd-device: Created %s file '%s' for '%s'", has_info ? "db" : "empty", |
1088 | path, device->devpath); | |
57fa1d09 TG |
1089 | |
1090 | return 0; | |
1091 | ||
1092 | fail: | |
dacd6cee LP |
1093 | (void) unlink(path); |
1094 | (void) unlink(path_tmp); | |
57fa1d09 | 1095 | |
c7d54dae | 1096 | return log_device_debug_errno(device, r, "sd-device: Failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath); |
57fa1d09 TG |
1097 | } |
1098 | ||
1099 | int device_delete_db(sd_device *device) { | |
1100 | const char *id; | |
1101 | char *path; | |
1102 | int r; | |
1103 | ||
1104 | assert(device); | |
1105 | ||
1106 | r = device_get_id_filename(device, &id); | |
1107 | if (r < 0) | |
1108 | return r; | |
1109 | ||
1110 | path = strjoina("/run/udev/data/", id); | |
1111 | ||
1112 | r = unlink(path); | |
1113 | if (r < 0 && errno != ENOENT) | |
1114 | return -errno; | |
1115 | ||
1116 | return 0; | |
1117 | } | |
107f2e25 TG |
1118 | |
1119 | int device_read_db_force(sd_device *device) { | |
1120 | assert(device); | |
1121 | ||
1122 | return device_read_db_aux(device, true); | |
1123 | } |