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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 | 6 | |
07630cea LP |
7 | #include "sd-device.h" |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
07630cea LP |
10 | #include "device-internal.h" |
11 | #include "device-private.h" | |
12 | #include "device-util.h" | |
8fb3f009 | 13 | #include "dirent-util.h" |
3ffd4af2 | 14 | #include "fd-util.h" |
57fa1d09 | 15 | #include "fileio.h" |
f4f15635 | 16 | #include "fs-util.h" |
57fa1d09 | 17 | #include "hashmap.h" |
07630cea | 18 | #include "macro.h" |
6bedfcbb | 19 | #include "parse-util.h" |
07630cea | 20 | #include "path-util.h" |
57fa1d09 | 21 | #include "set.h" |
429b4350 | 22 | #include "socket-util.h" |
8fcde012 | 23 | #include "stat-util.h" |
07630cea | 24 | #include "string-util.h" |
57fa1d09 | 25 | #include "strv.h" |
07630cea LP |
26 | #include "strxcpyx.h" |
27 | #include "util.h" | |
57fa1d09 TG |
28 | |
29 | int device_new_aux(sd_device **ret) { | |
1cc6c93a | 30 | sd_device *device = NULL; |
57fa1d09 TG |
31 | |
32 | assert(ret); | |
33 | ||
34 | device = new0(sd_device, 1); | |
35 | if (!device) | |
36 | return -ENOMEM; | |
37 | ||
38 | device->n_ref = 1; | |
39 | device->watch_handle = -1; | |
40 | ||
41 | *ret = device; | |
57fa1d09 TG |
42 | |
43 | return 0; | |
44 | } | |
45 | ||
46 | _public_ sd_device *sd_device_ref(sd_device *device) { | |
47 | if (device) | |
48 | assert_se(++ device->n_ref >= 2); | |
49 | ||
50 | return device; | |
51 | } | |
52 | ||
53 | _public_ sd_device *sd_device_unref(sd_device *device) { | |
54 | if (device && -- device->n_ref == 0) { | |
55 | sd_device_unref(device->parent); | |
56 | free(device->syspath); | |
57 | free(device->sysname); | |
58 | free(device->devtype); | |
59 | free(device->devname); | |
60 | free(device->subsystem); | |
de7e983e | 61 | free(device->driver_subsystem); |
57fa1d09 TG |
62 | free(device->driver); |
63 | free(device->id_filename); | |
64 | free(device->properties_strv); | |
65 | free(device->properties_nulstr); | |
66 | ||
67 | ordered_hashmap_free_free_free(device->properties); | |
68 | ordered_hashmap_free_free_free(device->properties_db); | |
69 | hashmap_free_free_free(device->sysattr_values); | |
70 | set_free_free(device->sysattrs); | |
71 | set_free_free(device->tags); | |
72 | set_free_free(device->devlinks); | |
73 | ||
74 | free(device); | |
75 | } | |
76 | ||
77 | return NULL; | |
78 | } | |
79 | ||
80 | int device_add_property_aux(sd_device *device, const char *_key, const char *_value, bool db) { | |
81 | OrderedHashmap **properties; | |
82 | ||
83 | assert(device); | |
84 | assert(_key); | |
85 | ||
86 | if (db) | |
87 | properties = &device->properties_db; | |
88 | else | |
89 | properties = &device->properties; | |
90 | ||
91 | if (_value) { | |
92 | _cleanup_free_ char *key = NULL, *value = NULL, *old_key = NULL, *old_value = NULL; | |
93 | int r; | |
94 | ||
95 | r = ordered_hashmap_ensure_allocated(properties, &string_hash_ops); | |
96 | if (r < 0) | |
97 | return r; | |
98 | ||
99 | key = strdup(_key); | |
100 | if (!key) | |
101 | return -ENOMEM; | |
102 | ||
103 | value = strdup(_value); | |
104 | if (!value) | |
105 | return -ENOMEM; | |
106 | ||
107 | old_value = ordered_hashmap_get2(*properties, key, (void**) &old_key); | |
108 | ||
109 | r = ordered_hashmap_replace(*properties, key, value); | |
110 | if (r < 0) | |
111 | return r; | |
112 | ||
113 | key = NULL; | |
114 | value = NULL; | |
115 | } else { | |
116 | _cleanup_free_ char *key = NULL; | |
117 | _cleanup_free_ char *value = NULL; | |
118 | ||
119 | value = ordered_hashmap_remove2(*properties, _key, (void**) &key); | |
120 | } | |
121 | ||
122 | if (!db) { | |
313cefa1 | 123 | device->properties_generation++; |
57fa1d09 TG |
124 | device->properties_buf_outdated = true; |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | int device_add_property_internal(sd_device *device, const char *key, const char *value) { | |
131 | return device_add_property_aux(device, key, value, false); | |
132 | } | |
133 | ||
134 | int device_set_syspath(sd_device *device, const char *_syspath, bool verify) { | |
135 | _cleanup_free_ char *syspath = NULL; | |
136 | const char *devpath; | |
137 | int r; | |
138 | ||
139 | assert(device); | |
140 | assert(_syspath); | |
141 | ||
142 | /* must be a subdirectory of /sys */ | |
143 | if (!path_startswith(_syspath, "/sys/")) { | |
144 | log_debug("sd-device: syspath '%s' is not a subdirectory of /sys", _syspath); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | if (verify) { | |
5bbe8eab | 149 | r = chase_symlinks(_syspath, NULL, 0, &syspath); |
08232a02 | 150 | if (r == -ENOENT) |
d89e0dc8 LP |
151 | return -ENODEV; /* the device does not exist (any more?) */ |
152 | if (r < 0) | |
153 | return log_debug_errno(r, "sd-device: could not get target of '%s': %m", _syspath); | |
57fa1d09 | 154 | |
2e1ec12e YW |
155 | if (!path_startswith(syspath, "/sys")) { |
156 | _cleanup_free_ char *real_sys = NULL, *new_syspath = NULL; | |
157 | char *p; | |
158 | ||
159 | /* /sys is a symlink to somewhere sysfs is mounted on? In that case, we convert the path to real sysfs to "/sys". */ | |
160 | r = chase_symlinks("/sys", NULL, 0, &real_sys); | |
161 | if (r < 0) | |
162 | return log_debug_errno(r, "sd-device: could not chase symlink /sys: %m"); | |
163 | ||
164 | p = path_startswith(syspath, real_sys); | |
165 | if (!p) { | |
166 | log_debug("sd-device: canonicalized path '%s' does not starts with sysfs mount point '%s'", syspath, real_sys); | |
167 | return -ENODEV; | |
168 | } | |
169 | ||
170 | new_syspath = strjoin("/sys/", p); | |
171 | if (!new_syspath) | |
172 | return log_oom(); | |
173 | ||
174 | free_and_replace(syspath, new_syspath); | |
858d36c1 | 175 | path_simplify(syspath, false); |
2e1ec12e YW |
176 | } |
177 | ||
57fa1d09 TG |
178 | if (path_startswith(syspath, "/sys/devices/")) { |
179 | char *path; | |
180 | ||
181 | /* all 'devices' require an 'uevent' file */ | |
182 | path = strjoina(syspath, "/uevent"); | |
183 | r = access(path, F_OK); | |
184 | if (r < 0) { | |
52d62901 TG |
185 | if (errno == ENOENT) |
186 | /* this is not a valid device */ | |
187 | return -ENODEV; | |
188 | ||
25f027c5 | 189 | return log_debug_errno(errno, "sd-device: %s does not have an uevent file: %m", syspath); |
57fa1d09 TG |
190 | } |
191 | } else { | |
61233823 | 192 | /* everything else just needs to be a directory */ |
52d62901 TG |
193 | if (!is_dir(syspath, false)) |
194 | return -ENODEV; | |
57fa1d09 TG |
195 | } |
196 | } else { | |
197 | syspath = strdup(_syspath); | |
198 | if (!syspath) | |
199 | return -ENOMEM; | |
200 | } | |
201 | ||
fbd0b64f | 202 | devpath = syspath + STRLEN("/sys"); |
57fa1d09 TG |
203 | |
204 | r = device_add_property_internal(device, "DEVPATH", devpath); | |
205 | if (r < 0) | |
206 | return r; | |
207 | ||
f9ecfd3b | 208 | free_and_replace(device->syspath, syspath); |
57fa1d09 TG |
209 | |
210 | device->devpath = devpath; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | _public_ int sd_device_new_from_syspath(sd_device **ret, const char *syspath) { | |
4afd3348 | 216 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
217 | int r; |
218 | ||
219 | assert_return(ret, -EINVAL); | |
220 | assert_return(syspath, -EINVAL); | |
221 | ||
222 | r = device_new_aux(&device); | |
223 | if (r < 0) | |
224 | return r; | |
225 | ||
226 | r = device_set_syspath(device, syspath, true); | |
227 | if (r < 0) | |
228 | return r; | |
229 | ||
1cc6c93a | 230 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
231 | |
232 | return 0; | |
233 | } | |
234 | ||
235 | _public_ int sd_device_new_from_devnum(sd_device **ret, char type, dev_t devnum) { | |
236 | char *syspath; | |
237 | char id[DECIMAL_STR_MAX(unsigned) * 2 + 1]; | |
238 | ||
239 | assert_return(ret, -EINVAL); | |
945c2931 | 240 | assert_return(IN_SET(type, 'b', 'c'), -EINVAL); |
57fa1d09 TG |
241 | |
242 | /* use /sys/dev/{block,char}/<maj>:<min> link */ | |
243 | snprintf(id, sizeof(id), "%u:%u", major(devnum), minor(devnum)); | |
244 | ||
245 | syspath = strjoina("/sys/dev/", (type == 'b' ? "block" : "char"), "/", id); | |
246 | ||
247 | return sd_device_new_from_syspath(ret, syspath); | |
248 | } | |
249 | ||
250 | _public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *subsystem, const char *sysname) { | |
21d6220f TG |
251 | char *name, *syspath; |
252 | size_t len = 0; | |
57fa1d09 TG |
253 | |
254 | assert_return(ret, -EINVAL); | |
255 | assert_return(subsystem, -EINVAL); | |
256 | assert_return(sysname, -EINVAL); | |
257 | ||
258 | if (streq(subsystem, "subsystem")) { | |
259 | syspath = strjoina("/sys/subsystem/", sysname); | |
260 | if (access(syspath, F_OK) >= 0) | |
261 | return sd_device_new_from_syspath(ret, syspath); | |
262 | ||
263 | syspath = strjoina("/sys/bus/", sysname); | |
264 | if (access(syspath, F_OK) >= 0) | |
265 | return sd_device_new_from_syspath(ret, syspath); | |
266 | ||
267 | syspath = strjoina("/sys/class/", sysname); | |
268 | if (access(syspath, F_OK) >= 0) | |
269 | return sd_device_new_from_syspath(ret, syspath); | |
270 | } else if (streq(subsystem, "module")) { | |
271 | syspath = strjoina("/sys/module/", sysname); | |
272 | if (access(syspath, F_OK) >= 0) | |
273 | return sd_device_new_from_syspath(ret, syspath); | |
274 | } else if (streq(subsystem, "drivers")) { | |
275 | char subsys[PATH_MAX]; | |
276 | char *driver; | |
277 | ||
278 | strscpy(subsys, sizeof(subsys), sysname); | |
279 | driver = strchr(subsys, ':'); | |
280 | if (driver) { | |
281 | driver[0] = '\0'; | |
282 | driver++; | |
283 | ||
284 | syspath = strjoina("/sys/subsystem/", subsys, "/drivers/", driver); | |
285 | if (access(syspath, F_OK) >= 0) | |
286 | return sd_device_new_from_syspath(ret, syspath); | |
287 | ||
288 | syspath = strjoina("/sys/bus/", subsys, "/drivers/", driver); | |
289 | if (access(syspath, F_OK) >= 0) | |
290 | return sd_device_new_from_syspath(ret, syspath); | |
21d6220f TG |
291 | } |
292 | } | |
a9ec9f29 | 293 | |
21d6220f TG |
294 | /* translate sysname back to sysfs filename */ |
295 | name = strdupa(sysname); | |
296 | while (name[len] != '\0') { | |
297 | if (name[len] == '/') | |
298 | name[len] = '!'; | |
a9ec9f29 | 299 | |
21d6220f TG |
300 | len++; |
301 | } | |
a9ec9f29 | 302 | |
21d6220f TG |
303 | syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name); |
304 | if (access(syspath, F_OK) >= 0) | |
305 | return sd_device_new_from_syspath(ret, syspath); | |
57fa1d09 | 306 | |
21d6220f TG |
307 | syspath = strjoina("/sys/bus/", subsystem, "/devices/", name); |
308 | if (access(syspath, F_OK) >= 0) | |
309 | return sd_device_new_from_syspath(ret, syspath); | |
57fa1d09 | 310 | |
21d6220f TG |
311 | syspath = strjoina("/sys/class/", subsystem, "/", name); |
312 | if (access(syspath, F_OK) >= 0) | |
313 | return sd_device_new_from_syspath(ret, syspath); | |
57fa1d09 | 314 | |
a918b673 PK |
315 | syspath = strjoina("/sys/firmware/", subsystem, "/", sysname); |
316 | if (access(syspath, F_OK) >= 0) | |
317 | return sd_device_new_from_syspath(ret, syspath); | |
318 | ||
08232a02 | 319 | return -ENODEV; |
57fa1d09 TG |
320 | } |
321 | ||
322 | int device_set_devtype(sd_device *device, const char *_devtype) { | |
323 | _cleanup_free_ char *devtype = NULL; | |
324 | int r; | |
325 | ||
326 | assert(device); | |
327 | assert(_devtype); | |
328 | ||
329 | devtype = strdup(_devtype); | |
330 | if (!devtype) | |
331 | return -ENOMEM; | |
332 | ||
333 | r = device_add_property_internal(device, "DEVTYPE", devtype); | |
334 | if (r < 0) | |
335 | return r; | |
336 | ||
f9ecfd3b | 337 | free_and_replace(device->devtype, devtype); |
57fa1d09 TG |
338 | |
339 | return 0; | |
340 | } | |
341 | ||
342 | int device_set_ifindex(sd_device *device, const char *_ifindex) { | |
343 | int ifindex, r; | |
344 | ||
345 | assert(device); | |
346 | assert(_ifindex); | |
347 | ||
6ad623a3 | 348 | r = parse_ifindex(_ifindex, &ifindex); |
57fa1d09 TG |
349 | if (r < 0) |
350 | return r; | |
351 | ||
57fa1d09 TG |
352 | r = device_add_property_internal(device, "IFINDEX", _ifindex); |
353 | if (r < 0) | |
354 | return r; | |
355 | ||
356 | device->ifindex = ifindex; | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | int device_set_devname(sd_device *device, const char *_devname) { | |
362 | _cleanup_free_ char *devname = NULL; | |
363 | int r; | |
364 | ||
365 | assert(device); | |
366 | assert(_devname); | |
367 | ||
368 | if (_devname[0] != '/') { | |
369 | r = asprintf(&devname, "/dev/%s", _devname); | |
370 | if (r < 0) | |
371 | return -ENOMEM; | |
372 | } else { | |
373 | devname = strdup(_devname); | |
374 | if (!devname) | |
375 | return -ENOMEM; | |
376 | } | |
377 | ||
378 | r = device_add_property_internal(device, "DEVNAME", devname); | |
379 | if (r < 0) | |
380 | return r; | |
381 | ||
f9ecfd3b | 382 | free_and_replace(device->devname, devname); |
57fa1d09 TG |
383 | |
384 | return 0; | |
385 | } | |
386 | ||
387 | int device_set_devmode(sd_device *device, const char *_devmode) { | |
388 | unsigned devmode; | |
389 | int r; | |
390 | ||
391 | assert(device); | |
392 | assert(_devmode); | |
393 | ||
394 | r = safe_atou(_devmode, &devmode); | |
395 | if (r < 0) | |
396 | return r; | |
397 | ||
398 | if (devmode > 07777) | |
399 | return -EINVAL; | |
400 | ||
401 | r = device_add_property_internal(device, "DEVMODE", _devmode); | |
402 | if (r < 0) | |
403 | return r; | |
404 | ||
405 | device->devmode = devmode; | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | int device_set_devnum(sd_device *device, const char *major, const char *minor) { | |
411 | unsigned maj = 0, min = 0; | |
412 | int r; | |
413 | ||
414 | assert(device); | |
415 | assert(major); | |
416 | ||
417 | r = safe_atou(major, &maj); | |
418 | if (r < 0) | |
419 | return r; | |
420 | if (!maj) | |
421 | return 0; | |
422 | ||
423 | if (minor) { | |
424 | r = safe_atou(minor, &min); | |
425 | if (r < 0) | |
426 | return r; | |
427 | } | |
428 | ||
429 | r = device_add_property_internal(device, "MAJOR", major); | |
430 | if (r < 0) | |
431 | return r; | |
432 | ||
433 | if (minor) { | |
434 | r = device_add_property_internal(device, "MINOR", minor); | |
435 | if (r < 0) | |
436 | return r; | |
437 | } | |
438 | ||
439 | device->devnum = makedev(maj, min); | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | static int handle_uevent_line(sd_device *device, const char *key, const char *value, const char **major, const char **minor) { | |
445 | int r; | |
446 | ||
447 | assert(device); | |
448 | assert(key); | |
449 | assert(value); | |
450 | assert(major); | |
451 | assert(minor); | |
452 | ||
453 | if (streq(key, "DEVTYPE")) { | |
454 | r = device_set_devtype(device, value); | |
455 | if (r < 0) | |
456 | return r; | |
457 | } else if (streq(key, "IFINDEX")) { | |
458 | r = device_set_ifindex(device, value); | |
459 | if (r < 0) | |
460 | return r; | |
461 | } else if (streq(key, "DEVNAME")) { | |
462 | r = device_set_devname(device, value); | |
463 | if (r < 0) | |
464 | return r; | |
465 | } else if (streq(key, "DEVMODE")) { | |
466 | r = device_set_devmode(device, value); | |
467 | if (r < 0) | |
468 | return r; | |
469 | } else if (streq(key, "MAJOR")) | |
470 | *major = value; | |
471 | else if (streq(key, "MINOR")) | |
472 | *minor = value; | |
473 | else { | |
474 | r = device_add_property_internal(device, key, value); | |
475 | if (r < 0) | |
476 | return r; | |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | int device_read_uevent_file(sd_device *device) { | |
483 | _cleanup_free_ char *uevent = NULL; | |
97c94b98 | 484 | const char *syspath, *key = NULL, *value = NULL, *major = NULL, *minor = NULL; |
57fa1d09 TG |
485 | char *path; |
486 | size_t uevent_len; | |
487 | unsigned i; | |
488 | int r; | |
489 | ||
490 | enum { | |
491 | PRE_KEY, | |
492 | KEY, | |
493 | PRE_VALUE, | |
494 | VALUE, | |
495 | INVALID_LINE, | |
496 | } state = PRE_KEY; | |
497 | ||
498 | assert(device); | |
499 | ||
500 | if (device->uevent_loaded || device->sealed) | |
501 | return 0; | |
502 | ||
7141e4f6 TG |
503 | device->uevent_loaded = true; |
504 | ||
57fa1d09 TG |
505 | r = sd_device_get_syspath(device, &syspath); |
506 | if (r < 0) | |
507 | return r; | |
508 | ||
509 | path = strjoina(syspath, "/uevent"); | |
510 | ||
511 | r = read_full_file(path, &uevent, &uevent_len); | |
bba06166 TG |
512 | if (r == -EACCES) |
513 | /* empty uevent files may be write-only */ | |
514 | return 0; | |
2a213740 TG |
515 | else if (r == -ENOENT) |
516 | /* some devices may not have uevent files, see set_syspath() */ | |
517 | return 0; | |
bba06166 | 518 | else if (r < 0) { |
e53fc357 | 519 | log_debug_errno(r, "sd-device: failed to read uevent file '%s': %m", path); |
57fa1d09 TG |
520 | return r; |
521 | } | |
522 | ||
755700bb | 523 | for (i = 0; i < uevent_len; i++) |
57fa1d09 TG |
524 | switch (state) { |
525 | case PRE_KEY: | |
526 | if (!strchr(NEWLINE, uevent[i])) { | |
527 | key = &uevent[i]; | |
528 | ||
529 | state = KEY; | |
530 | } | |
531 | ||
532 | break; | |
533 | case KEY: | |
534 | if (uevent[i] == '=') { | |
535 | uevent[i] = '\0'; | |
536 | ||
537 | state = PRE_VALUE; | |
538 | } else if (strchr(NEWLINE, uevent[i])) { | |
539 | uevent[i] = '\0'; | |
540 | log_debug("sd-device: ignoring invalid uevent line '%s'", key); | |
541 | ||
542 | state = PRE_KEY; | |
543 | } | |
544 | ||
545 | break; | |
546 | case PRE_VALUE: | |
547 | value = &uevent[i]; | |
57fa1d09 TG |
548 | state = VALUE; |
549 | ||
4831981d | 550 | _fallthrough_; /* to handle empty property */ |
57fa1d09 TG |
551 | case VALUE: |
552 | if (strchr(NEWLINE, uevent[i])) { | |
553 | uevent[i] = '\0'; | |
554 | ||
555 | r = handle_uevent_line(device, key, value, &major, &minor); | |
556 | if (r < 0) | |
19c29853 | 557 | log_debug_errno(r, "sd-device: failed to handle uevent entry '%s=%s': %m", key, value); |
57fa1d09 TG |
558 | |
559 | state = PRE_KEY; | |
560 | } | |
561 | ||
562 | break; | |
563 | default: | |
564 | assert_not_reached("invalid state when parsing uevent file"); | |
565 | } | |
57fa1d09 TG |
566 | |
567 | if (major) { | |
568 | r = device_set_devnum(device, major, minor); | |
569 | if (r < 0) | |
23446f01 | 570 | log_debug_errno(r, "sd-device: could not set 'MAJOR=%s' or 'MINOR=%s' from '%s': %m", major, minor, path); |
57fa1d09 TG |
571 | } |
572 | ||
57fa1d09 TG |
573 | return 0; |
574 | } | |
575 | ||
576 | _public_ int sd_device_get_ifindex(sd_device *device, int *ifindex) { | |
577 | int r; | |
578 | ||
579 | assert_return(device, -EINVAL); | |
580 | assert_return(ifindex, -EINVAL); | |
581 | ||
582 | r = device_read_uevent_file(device); | |
583 | if (r < 0) | |
584 | return r; | |
585 | ||
586 | *ifindex = device->ifindex; | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | _public_ int sd_device_new_from_device_id(sd_device **ret, const char *id) { | |
592 | int r; | |
593 | ||
594 | assert_return(ret, -EINVAL); | |
595 | assert_return(id, -EINVAL); | |
596 | ||
597 | switch (id[0]) { | |
598 | case 'b': | |
599 | case 'c': | |
600 | { | |
601 | char type; | |
602 | int maj, min; | |
603 | ||
604 | r = sscanf(id, "%c%i:%i", &type, &maj, &min); | |
605 | if (r != 3) | |
606 | return -EINVAL; | |
607 | ||
608 | return sd_device_new_from_devnum(ret, type, makedev(maj, min)); | |
609 | } | |
610 | case 'n': | |
611 | { | |
4afd3348 | 612 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
613 | _cleanup_close_ int sk = -1; |
614 | struct ifreq ifr = {}; | |
615 | int ifindex; | |
616 | ||
6ad623a3 | 617 | r = parse_ifindex(&id[1], &ifr.ifr_ifindex); |
57fa1d09 TG |
618 | if (r < 0) |
619 | return r; | |
57fa1d09 | 620 | |
429b4350 | 621 | sk = socket_ioctl_fd(); |
57fa1d09 | 622 | if (sk < 0) |
429b4350 | 623 | return sk; |
57fa1d09 TG |
624 | |
625 | r = ioctl(sk, SIOCGIFNAME, &ifr); | |
626 | if (r < 0) | |
627 | return -errno; | |
628 | ||
629 | r = sd_device_new_from_subsystem_sysname(&device, "net", ifr.ifr_name); | |
630 | if (r < 0) | |
631 | return r; | |
632 | ||
633 | r = sd_device_get_ifindex(device, &ifindex); | |
634 | if (r < 0) | |
635 | return r; | |
636 | ||
08232a02 | 637 | /* this is racey, so we might end up with the wrong device */ |
57fa1d09 TG |
638 | if (ifr.ifr_ifindex != ifindex) |
639 | return -ENODEV; | |
640 | ||
1cc6c93a | 641 | *ret = TAKE_PTR(device); |
57fa1d09 TG |
642 | |
643 | return 0; | |
644 | } | |
645 | case '+': | |
646 | { | |
647 | char subsys[PATH_MAX]; | |
648 | char *sysname; | |
649 | ||
650 | (void)strscpy(subsys, sizeof(subsys), id + 1); | |
651 | sysname = strchr(subsys, ':'); | |
652 | if (!sysname) | |
653 | return -EINVAL; | |
654 | ||
655 | sysname[0] = '\0'; | |
313cefa1 | 656 | sysname++; |
57fa1d09 TG |
657 | |
658 | return sd_device_new_from_subsystem_sysname(ret, subsys, sysname); | |
659 | } | |
660 | default: | |
661 | return -EINVAL; | |
662 | } | |
663 | } | |
664 | ||
665 | _public_ int sd_device_get_syspath(sd_device *device, const char **ret) { | |
666 | assert_return(device, -EINVAL); | |
667 | assert_return(ret, -EINVAL); | |
668 | ||
669 | assert(path_startswith(device->syspath, "/sys/")); | |
670 | ||
671 | *ret = device->syspath; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | static int device_new_from_child(sd_device **ret, sd_device *child) { | |
677 | _cleanup_free_ char *path = NULL; | |
678 | const char *subdir, *syspath; | |
679 | int r; | |
680 | ||
681 | assert(ret); | |
682 | assert(child); | |
683 | ||
684 | r = sd_device_get_syspath(child, &syspath); | |
685 | if (r < 0) | |
686 | return r; | |
687 | ||
688 | path = strdup(syspath); | |
689 | if (!path) | |
690 | return -ENOMEM; | |
fbd0b64f | 691 | subdir = path + STRLEN("/sys"); |
57fa1d09 TG |
692 | |
693 | for (;;) { | |
694 | char *pos; | |
695 | ||
696 | pos = strrchr(subdir, '/'); | |
697 | if (!pos || pos < subdir + 2) | |
698 | break; | |
699 | ||
700 | *pos = '\0'; | |
701 | ||
702 | r = sd_device_new_from_syspath(ret, path); | |
703 | if (r < 0) | |
704 | continue; | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
08232a02 | 709 | return -ENODEV; |
57fa1d09 TG |
710 | } |
711 | ||
712 | _public_ int sd_device_get_parent(sd_device *child, sd_device **ret) { | |
713 | ||
714 | assert_return(ret, -EINVAL); | |
715 | assert_return(child, -EINVAL); | |
716 | ||
717 | if (!child->parent_set) { | |
718 | child->parent_set = true; | |
719 | ||
720 | (void)device_new_from_child(&child->parent, child); | |
721 | } | |
722 | ||
723 | if (!child->parent) | |
724 | return -ENOENT; | |
725 | ||
726 | *ret = child->parent; | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | int device_set_subsystem(sd_device *device, const char *_subsystem) { | |
732 | _cleanup_free_ char *subsystem = NULL; | |
733 | int r; | |
734 | ||
735 | assert(device); | |
736 | assert(_subsystem); | |
737 | ||
738 | subsystem = strdup(_subsystem); | |
739 | if (!subsystem) | |
740 | return -ENOMEM; | |
741 | ||
742 | r = device_add_property_internal(device, "SUBSYSTEM", subsystem); | |
743 | if (r < 0) | |
744 | return r; | |
745 | ||
f9ecfd3b | 746 | free_and_replace(device->subsystem, subsystem); |
57fa1d09 TG |
747 | |
748 | device->subsystem_set = true; | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
de7e983e TG |
753 | static int device_set_drivers_subsystem(sd_device *device, const char *_subsystem) { |
754 | _cleanup_free_ char *subsystem = NULL; | |
755 | int r; | |
756 | ||
757 | assert(device); | |
758 | assert(_subsystem); | |
759 | assert(*_subsystem); | |
760 | ||
761 | subsystem = strdup(_subsystem); | |
762 | if (!subsystem) | |
763 | return -ENOMEM; | |
764 | ||
765 | r = device_set_subsystem(device, "drivers"); | |
766 | if (r < 0) | |
767 | return r; | |
768 | ||
f9ecfd3b | 769 | free_and_replace(device->driver_subsystem, subsystem); |
de7e983e TG |
770 | |
771 | return 0; | |
772 | } | |
773 | ||
57fa1d09 | 774 | _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) { |
de7e983e TG |
775 | const char *syspath, *drivers = NULL; |
776 | int r; | |
777 | ||
57fa1d09 TG |
778 | assert_return(ret, -EINVAL); |
779 | assert_return(device, -EINVAL); | |
780 | ||
de7e983e TG |
781 | r = sd_device_get_syspath(device, &syspath); |
782 | if (r < 0) | |
783 | return r; | |
784 | ||
57fa1d09 TG |
785 | if (!device->subsystem_set) { |
786 | _cleanup_free_ char *subsystem = NULL; | |
57fa1d09 | 787 | char *path; |
57fa1d09 TG |
788 | |
789 | /* read 'subsystem' link */ | |
57fa1d09 TG |
790 | path = strjoina(syspath, "/subsystem"); |
791 | r = readlink_value(path, &subsystem); | |
792 | if (r >= 0) | |
793 | r = device_set_subsystem(device, subsystem); | |
794 | /* use implicit names */ | |
795 | else if (path_startswith(device->devpath, "/module/")) | |
796 | r = device_set_subsystem(device, "module"); | |
de7e983e TG |
797 | else if (!(drivers = strstr(syspath, "/drivers/")) && |
798 | (path_startswith(device->devpath, "/subsystem/") || | |
799 | path_startswith(device->devpath, "/class/") || | |
800 | path_startswith(device->devpath, "/bus/"))) | |
57fa1d09 | 801 | r = device_set_subsystem(device, "subsystem"); |
4189708a | 802 | if (r < 0 && r != -ENOENT) |
5a917c06 | 803 | return log_debug_errno(r, "sd-device: could not set subsystem for %s: %m", device->devpath); |
57fa1d09 TG |
804 | |
805 | device->subsystem_set = true; | |
de7e983e TG |
806 | } else if (!device->driver_subsystem_set) |
807 | drivers = strstr(syspath, "/drivers/"); | |
808 | ||
809 | if (!device->driver_subsystem_set) { | |
810 | if (drivers) { | |
811 | _cleanup_free_ char *subpath = NULL; | |
812 | ||
813 | subpath = strndup(syspath, drivers - syspath); | |
814 | if (!subpath) | |
815 | r = -ENOMEM; | |
816 | else { | |
817 | const char *subsys; | |
818 | ||
819 | subsys = strrchr(subpath, '/'); | |
820 | if (!subsys) | |
821 | r = -EINVAL; | |
822 | else | |
823 | r = device_set_drivers_subsystem(device, subsys + 1); | |
824 | } | |
825 | if (r < 0 && r != -ENOENT) | |
826 | return log_debug_errno(r, "sd-device: could not set subsystem for driver %s: %m", device->devpath); | |
827 | } | |
828 | ||
829 | device->driver_subsystem_set = true; | |
57fa1d09 TG |
830 | } |
831 | ||
bf4c113e DH |
832 | if (!device->subsystem) |
833 | return -ENOENT; | |
834 | ||
57fa1d09 TG |
835 | *ret = device->subsystem; |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
840 | _public_ int sd_device_get_devtype(sd_device *device, const char **devtype) { | |
841 | int r; | |
842 | ||
843 | assert(devtype); | |
844 | assert(device); | |
845 | ||
846 | r = device_read_uevent_file(device); | |
847 | if (r < 0) | |
848 | return r; | |
849 | ||
850 | *devtype = device->devtype; | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
855 | _public_ int sd_device_get_parent_with_subsystem_devtype(sd_device *child, const char *subsystem, const char *devtype, sd_device **ret) { | |
856 | sd_device *parent = NULL; | |
857 | int r; | |
858 | ||
859 | assert_return(child, -EINVAL); | |
860 | assert_return(subsystem, -EINVAL); | |
861 | ||
862 | r = sd_device_get_parent(child, &parent); | |
863 | while (r >= 0) { | |
864 | const char *parent_subsystem = NULL; | |
865 | const char *parent_devtype = NULL; | |
866 | ||
867 | (void)sd_device_get_subsystem(parent, &parent_subsystem); | |
868 | if (streq_ptr(parent_subsystem, subsystem)) { | |
869 | if (!devtype) | |
870 | break; | |
871 | ||
872 | (void)sd_device_get_devtype(parent, &parent_devtype); | |
873 | if (streq_ptr(parent_devtype, devtype)) | |
874 | break; | |
875 | } | |
876 | r = sd_device_get_parent(parent, &parent); | |
877 | } | |
878 | ||
879 | if (r < 0) | |
880 | return r; | |
881 | ||
882 | *ret = parent; | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
887 | _public_ int sd_device_get_devnum(sd_device *device, dev_t *devnum) { | |
888 | int r; | |
889 | ||
890 | assert_return(device, -EINVAL); | |
891 | assert_return(devnum, -EINVAL); | |
892 | ||
893 | r = device_read_uevent_file(device); | |
894 | if (r < 0) | |
895 | return r; | |
896 | ||
897 | *devnum = device->devnum; | |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
902 | int device_set_driver(sd_device *device, const char *_driver) { | |
903 | _cleanup_free_ char *driver = NULL; | |
904 | int r; | |
905 | ||
906 | assert(device); | |
907 | assert(_driver); | |
908 | ||
909 | driver = strdup(_driver); | |
910 | if (!driver) | |
911 | return -ENOMEM; | |
912 | ||
913 | r = device_add_property_internal(device, "DRIVER", driver); | |
914 | if (r < 0) | |
915 | return r; | |
916 | ||
f9ecfd3b | 917 | free_and_replace(device->driver, driver); |
57fa1d09 TG |
918 | |
919 | device->driver_set = true; | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | _public_ int sd_device_get_driver(sd_device *device, const char **ret) { | |
925 | assert_return(device, -EINVAL); | |
926 | assert_return(ret, -EINVAL); | |
927 | ||
928 | if (!device->driver_set) { | |
929 | _cleanup_free_ char *driver = NULL; | |
930 | const char *syspath; | |
931 | char *path; | |
932 | int r; | |
933 | ||
934 | r = sd_device_get_syspath(device, &syspath); | |
935 | if (r < 0) | |
936 | return r; | |
937 | ||
938 | path = strjoina(syspath, "/driver"); | |
939 | r = readlink_value(path, &driver); | |
940 | if (r >= 0) { | |
941 | r = device_set_driver(device, driver); | |
942 | if (r < 0) | |
7283a80d TG |
943 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); |
944 | } else if (r == -ENOENT) | |
945 | device->driver_set = true; | |
946 | else | |
947 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); | |
57fa1d09 TG |
948 | } |
949 | ||
bf4c113e DH |
950 | if (!device->driver) |
951 | return -ENOENT; | |
952 | ||
57fa1d09 TG |
953 | *ret = device->driver; |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | _public_ int sd_device_get_devpath(sd_device *device, const char **devpath) { | |
959 | assert_return(device, -EINVAL); | |
960 | assert_return(devpath, -EINVAL); | |
961 | ||
962 | assert(device->devpath); | |
963 | assert(device->devpath[0] == '/'); | |
964 | ||
965 | *devpath = device->devpath; | |
966 | ||
967 | return 0; | |
968 | } | |
969 | ||
970 | _public_ int sd_device_get_devname(sd_device *device, const char **devname) { | |
971 | int r; | |
972 | ||
973 | assert_return(device, -EINVAL); | |
974 | assert_return(devname, -EINVAL); | |
975 | ||
976 | r = device_read_uevent_file(device); | |
977 | if (r < 0) | |
978 | return r; | |
979 | ||
980 | if (!device->devname) | |
981 | return -ENOENT; | |
982 | ||
983 | assert(path_startswith(device->devname, "/dev/")); | |
984 | ||
985 | *devname = device->devname; | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
990 | static int device_set_sysname(sd_device *device) { | |
991 | _cleanup_free_ char *sysname = NULL; | |
afcac065 | 992 | const char *sysnum = NULL; |
57fa1d09 TG |
993 | const char *pos; |
994 | size_t len = 0; | |
995 | ||
996 | pos = strrchr(device->devpath, '/'); | |
997 | if (!pos) | |
998 | return -EINVAL; | |
313cefa1 | 999 | pos++; |
57fa1d09 TG |
1000 | |
1001 | /* devpath is not a root directory */ | |
1002 | if (*pos == '\0' || pos <= device->devpath) | |
1003 | return -EINVAL; | |
1004 | ||
1005 | sysname = strdup(pos); | |
1006 | if (!sysname) | |
1007 | return -ENOMEM; | |
1008 | ||
1009 | /* some devices have '!' in their name, change that to '/' */ | |
1010 | while (sysname[len] != '\0') { | |
1011 | if (sysname[len] == '!') | |
1012 | sysname[len] = '/'; | |
1013 | ||
313cefa1 | 1014 | len++; |
57fa1d09 TG |
1015 | } |
1016 | ||
1017 | /* trailing number */ | |
1018 | while (len > 0 && isdigit(sysname[--len])) | |
1019 | sysnum = &sysname[len]; | |
1020 | ||
1021 | if (len == 0) | |
1022 | sysnum = NULL; | |
1023 | ||
f9ecfd3b | 1024 | free_and_replace(device->sysname, sysname); |
57fa1d09 TG |
1025 | |
1026 | device->sysnum = sysnum; | |
1027 | ||
1028 | device->sysname_set = true; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | _public_ int sd_device_get_sysname(sd_device *device, const char **ret) { | |
1034 | int r; | |
1035 | ||
1036 | assert_return(device, -EINVAL); | |
1037 | assert_return(ret, -EINVAL); | |
1038 | ||
1039 | if (!device->sysname_set) { | |
1040 | r = device_set_sysname(device); | |
1041 | if (r < 0) | |
1042 | return r; | |
1043 | } | |
1044 | ||
bf4c113e DH |
1045 | assert_return(device->sysname, -ENOENT); |
1046 | ||
57fa1d09 TG |
1047 | *ret = device->sysname; |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | _public_ int sd_device_get_sysnum(sd_device *device, const char **ret) { | |
1053 | int r; | |
1054 | ||
1055 | assert_return(device, -EINVAL); | |
1056 | assert_return(ret, -EINVAL); | |
1057 | ||
1058 | if (!device->sysname_set) { | |
1059 | r = device_set_sysname(device); | |
1060 | if (r < 0) | |
1061 | return r; | |
1062 | } | |
1063 | ||
1064 | *ret = device->sysnum; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | static bool is_valid_tag(const char *tag) { | |
1070 | assert(tag); | |
1071 | ||
1072 | return !strchr(tag, ':') && !strchr(tag, ' '); | |
1073 | } | |
1074 | ||
1075 | int device_add_tag(sd_device *device, const char *tag) { | |
1076 | int r; | |
1077 | ||
1078 | assert(device); | |
1079 | assert(tag); | |
1080 | ||
1081 | if (!is_valid_tag(tag)) | |
1082 | return -EINVAL; | |
1083 | ||
1084 | r = set_ensure_allocated(&device->tags, &string_hash_ops); | |
1085 | if (r < 0) | |
1086 | return r; | |
1087 | ||
1088 | r = set_put_strdup(device->tags, tag); | |
1089 | if (r < 0) | |
1090 | return r; | |
1091 | ||
313cefa1 | 1092 | device->tags_generation++; |
57fa1d09 TG |
1093 | device->property_tags_outdated = true; |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | int device_add_devlink(sd_device *device, const char *devlink) { | |
1099 | int r; | |
1100 | ||
1101 | assert(device); | |
1102 | assert(devlink); | |
1103 | ||
1104 | r = set_ensure_allocated(&device->devlinks, &string_hash_ops); | |
1105 | if (r < 0) | |
1106 | return r; | |
1107 | ||
1108 | r = set_put_strdup(device->devlinks, devlink); | |
1109 | if (r < 0) | |
1110 | return r; | |
1111 | ||
313cefa1 | 1112 | device->devlinks_generation++; |
57fa1d09 TG |
1113 | device->property_devlinks_outdated = true; |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
1119 | _cleanup_free_ char *key = NULL; | |
1120 | char *value; | |
1121 | ||
1122 | assert(device); | |
1123 | assert(str); | |
1124 | ||
1125 | key = strdup(str); | |
1126 | if (!key) | |
1127 | return -ENOMEM; | |
1128 | ||
1129 | value = strchr(key, '='); | |
1130 | if (!value) | |
1131 | return -EINVAL; | |
1132 | ||
1133 | *value = '\0'; | |
1134 | ||
1135 | if (isempty(++value)) | |
1136 | value = NULL; | |
1137 | ||
1138 | return device_add_property_internal(device, key, value); | |
1139 | } | |
1140 | ||
1141 | int device_set_usec_initialized(sd_device *device, const char *initialized) { | |
1142 | uint64_t usec_initialized; | |
1143 | int r; | |
1144 | ||
1145 | assert(device); | |
1146 | assert(initialized); | |
1147 | ||
1148 | r = safe_atou64(initialized, &usec_initialized); | |
1149 | if (r < 0) | |
1150 | return r; | |
1151 | ||
1152 | r = device_add_property_internal(device, "USEC_INITIALIZED", initialized); | |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | ||
1156 | device->usec_initialized = usec_initialized; | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
1162 | char *path; | |
1163 | int r; | |
1164 | ||
1165 | assert(device); | |
1166 | assert(value); | |
1167 | ||
1168 | switch (key) { | |
1169 | case 'G': | |
1170 | r = device_add_tag(device, value); | |
1171 | if (r < 0) | |
1172 | return r; | |
1173 | ||
1174 | break; | |
1175 | case 'S': | |
1176 | path = strjoina("/dev/", value); | |
1177 | r = device_add_devlink(device, path); | |
1178 | if (r < 0) | |
1179 | return r; | |
1180 | ||
1181 | break; | |
1182 | case 'E': | |
1183 | r = device_add_property_internal_from_string(device, value); | |
1184 | if (r < 0) | |
1185 | return r; | |
1186 | ||
1187 | break; | |
1188 | case 'I': | |
1189 | r = device_set_usec_initialized(device, value); | |
1190 | if (r < 0) | |
1191 | return r; | |
1192 | ||
1193 | break; | |
1194 | case 'L': | |
1195 | r = safe_atoi(value, &device->devlink_priority); | |
1196 | if (r < 0) | |
1197 | return r; | |
1198 | ||
1199 | break; | |
1200 | case 'W': | |
1201 | r = safe_atoi(value, &device->watch_handle); | |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | ||
1205 | break; | |
1206 | default: | |
1207 | log_debug("device db: unknown key '%c'", key); | |
1208 | } | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | int device_get_id_filename(sd_device *device, const char **ret) { | |
1214 | assert(device); | |
1215 | assert(ret); | |
1216 | ||
1217 | if (!device->id_filename) { | |
1218 | _cleanup_free_ char *id = NULL; | |
1219 | const char *subsystem; | |
1220 | dev_t devnum; | |
1221 | int ifindex, r; | |
1222 | ||
1223 | r = sd_device_get_subsystem(device, &subsystem); | |
1224 | if (r < 0) | |
1225 | return r; | |
1226 | ||
1227 | r = sd_device_get_devnum(device, &devnum); | |
1228 | if (r < 0) | |
1229 | return r; | |
1230 | ||
1231 | r = sd_device_get_ifindex(device, &ifindex); | |
1232 | if (r < 0) | |
1233 | return r; | |
1234 | ||
1235 | if (major(devnum) > 0) { | |
4189708a TG |
1236 | assert(subsystem); |
1237 | ||
ccddd104 | 1238 | /* use dev_t — b259:131072, c254:0 */ |
57fa1d09 TG |
1239 | r = asprintf(&id, "%c%u:%u", |
1240 | streq(subsystem, "block") ? 'b' : 'c', | |
1241 | major(devnum), minor(devnum)); | |
1242 | if (r < 0) | |
53fae771 | 1243 | return -ENOMEM; |
57fa1d09 | 1244 | } else if (ifindex > 0) { |
ccddd104 | 1245 | /* use netdev ifindex — n3 */ |
57fa1d09 TG |
1246 | r = asprintf(&id, "n%u", ifindex); |
1247 | if (r < 0) | |
53fae771 | 1248 | return -ENOMEM; |
57fa1d09 | 1249 | } else { |
ccddd104 | 1250 | /* use $subsys:$sysname — pci:0000:00:1f.2 |
57fa1d09 TG |
1251 | * sysname() has '!' translated, get it from devpath |
1252 | */ | |
1253 | const char *sysname; | |
1254 | ||
1255 | sysname = basename(device->devpath); | |
1256 | if (!sysname) | |
4189708a TG |
1257 | return -EINVAL; |
1258 | ||
1259 | if (!subsystem) | |
57fa1d09 TG |
1260 | return -EINVAL; |
1261 | ||
de7e983e TG |
1262 | if (streq(subsystem, "drivers")) { |
1263 | /* the 'drivers' pseudo-subsystem is special, and needs the real subsystem | |
1264 | * encoded as well */ | |
1265 | r = asprintf(&id, "+drivers:%s:%s", device->driver_subsystem, sysname); | |
1266 | if (r < 0) | |
1267 | return -ENOMEM; | |
1268 | } else { | |
1269 | r = asprintf(&id, "+%s:%s", subsystem, sysname); | |
1270 | if (r < 0) | |
1271 | return -ENOMEM; | |
1272 | } | |
57fa1d09 TG |
1273 | } |
1274 | ||
ae2a15bc | 1275 | device->id_filename = TAKE_PTR(id); |
57fa1d09 TG |
1276 | } |
1277 | ||
1278 | *ret = device->id_filename; | |
1279 | ||
1280 | return 0; | |
1281 | } | |
1282 | ||
107f2e25 | 1283 | int device_read_db_aux(sd_device *device, bool force) { |
57fa1d09 TG |
1284 | _cleanup_free_ char *db = NULL; |
1285 | char *path; | |
1286 | const char *id, *value; | |
1287 | char key; | |
1288 | size_t db_len; | |
1289 | unsigned i; | |
1290 | int r; | |
1291 | ||
1292 | enum { | |
1293 | PRE_KEY, | |
1294 | KEY, | |
1295 | PRE_VALUE, | |
1296 | VALUE, | |
1297 | INVALID_LINE, | |
1298 | } state = PRE_KEY; | |
1299 | ||
107f2e25 | 1300 | if (device->db_loaded || (!force && device->sealed)) |
57fa1d09 TG |
1301 | return 0; |
1302 | ||
7141e4f6 TG |
1303 | device->db_loaded = true; |
1304 | ||
57fa1d09 TG |
1305 | r = device_get_id_filename(device, &id); |
1306 | if (r < 0) | |
1307 | return r; | |
1308 | ||
1309 | path = strjoina("/run/udev/data/", id); | |
1310 | ||
1311 | r = read_full_file(path, &db, &db_len); | |
1312 | if (r < 0) { | |
1313 | if (r == -ENOENT) | |
1314 | return 0; | |
e53fc357 LP |
1315 | else |
1316 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
1317 | } |
1318 | ||
1319 | /* devices with a database entry are initialized */ | |
7e518afa | 1320 | device->is_initialized = true; |
57fa1d09 TG |
1321 | |
1322 | for (i = 0; i < db_len; i++) { | |
1323 | switch (state) { | |
1324 | case PRE_KEY: | |
1325 | if (!strchr(NEWLINE, db[i])) { | |
1326 | key = db[i]; | |
1327 | ||
1328 | state = KEY; | |
1329 | } | |
1330 | ||
1331 | break; | |
1332 | case KEY: | |
1333 | if (db[i] != ':') { | |
1334 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
1335 | ||
1336 | state = INVALID_LINE; | |
1337 | } else { | |
1338 | db[i] = '\0'; | |
1339 | ||
1340 | state = PRE_VALUE; | |
1341 | } | |
1342 | ||
1343 | break; | |
1344 | case PRE_VALUE: | |
1345 | value = &db[i]; | |
1346 | ||
1347 | state = VALUE; | |
1348 | ||
1349 | break; | |
1350 | case INVALID_LINE: | |
1351 | if (strchr(NEWLINE, db[i])) | |
1352 | state = PRE_KEY; | |
1353 | ||
1354 | break; | |
1355 | case VALUE: | |
1356 | if (strchr(NEWLINE, db[i])) { | |
1357 | db[i] = '\0'; | |
1358 | r = handle_db_line(device, key, value); | |
1359 | if (r < 0) | |
19c29853 | 1360 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
1361 | |
1362 | state = PRE_KEY; | |
1363 | } | |
1364 | ||
1365 | break; | |
1366 | default: | |
1367 | assert_not_reached("invalid state when parsing db"); | |
1368 | } | |
1369 | } | |
1370 | ||
57fa1d09 TG |
1371 | return 0; |
1372 | } | |
1373 | ||
107f2e25 TG |
1374 | static int device_read_db(sd_device *device) { |
1375 | return device_read_db_aux(device, false); | |
1376 | } | |
1377 | ||
57fa1d09 TG |
1378 | _public_ int sd_device_get_is_initialized(sd_device *device, int *initialized) { |
1379 | int r; | |
1380 | ||
1381 | assert_return(device, -EINVAL); | |
1382 | assert_return(initialized, -EINVAL); | |
1383 | ||
1384 | r = device_read_db(device); | |
1385 | if (r < 0) | |
1386 | return r; | |
1387 | ||
1388 | *initialized = device->is_initialized; | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | _public_ int sd_device_get_usec_since_initialized(sd_device *device, uint64_t *usec) { | |
1394 | usec_t now_ts; | |
1395 | int r; | |
1396 | ||
1397 | assert_return(device, -EINVAL); | |
1398 | assert_return(usec, -EINVAL); | |
1399 | ||
1400 | r = device_read_db(device); | |
1401 | if (r < 0) | |
1402 | return r; | |
1403 | ||
1404 | if (!device->is_initialized) | |
1405 | return -EBUSY; | |
1406 | ||
1407 | if (!device->usec_initialized) | |
1408 | return -ENODATA; | |
1409 | ||
1410 | now_ts = now(clock_boottime_or_monotonic()); | |
1411 | ||
1412 | if (now_ts < device->usec_initialized) | |
1413 | return -EIO; | |
1414 | ||
1415 | *usec = now_ts - device->usec_initialized; | |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | _public_ const char *sd_device_get_tag_first(sd_device *device) { | |
8927b1da DH |
1421 | void *v; |
1422 | ||
57fa1d09 TG |
1423 | assert_return(device, NULL); |
1424 | ||
1425 | (void) device_read_db(device); | |
1426 | ||
1427 | device->tags_iterator_generation = device->tags_generation; | |
1428 | device->tags_iterator = ITERATOR_FIRST; | |
1429 | ||
bccfe92e | 1430 | (void) set_iterate(device->tags, &device->tags_iterator, &v); |
8927b1da | 1431 | return v; |
57fa1d09 TG |
1432 | } |
1433 | ||
1434 | _public_ const char *sd_device_get_tag_next(sd_device *device) { | |
8927b1da DH |
1435 | void *v; |
1436 | ||
57fa1d09 TG |
1437 | assert_return(device, NULL); |
1438 | ||
1439 | (void) device_read_db(device); | |
1440 | ||
1441 | if (device->tags_iterator_generation != device->tags_generation) | |
1442 | return NULL; | |
1443 | ||
bccfe92e | 1444 | (void) set_iterate(device->tags, &device->tags_iterator, &v); |
8927b1da | 1445 | return v; |
57fa1d09 TG |
1446 | } |
1447 | ||
1448 | _public_ const char *sd_device_get_devlink_first(sd_device *device) { | |
8927b1da DH |
1449 | void *v; |
1450 | ||
57fa1d09 TG |
1451 | assert_return(device, NULL); |
1452 | ||
1453 | (void) device_read_db(device); | |
1454 | ||
1455 | device->devlinks_iterator_generation = device->devlinks_generation; | |
1456 | device->devlinks_iterator = ITERATOR_FIRST; | |
1457 | ||
bccfe92e | 1458 | (void) set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
8927b1da | 1459 | return v; |
57fa1d09 TG |
1460 | } |
1461 | ||
1462 | _public_ const char *sd_device_get_devlink_next(sd_device *device) { | |
8927b1da DH |
1463 | void *v; |
1464 | ||
57fa1d09 TG |
1465 | assert_return(device, NULL); |
1466 | ||
1467 | (void) device_read_db(device); | |
1468 | ||
1469 | if (device->devlinks_iterator_generation != device->devlinks_generation) | |
1470 | return NULL; | |
1471 | ||
bccfe92e | 1472 | (void) set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
8927b1da | 1473 | return v; |
57fa1d09 TG |
1474 | } |
1475 | ||
1476 | static int device_properties_prepare(sd_device *device) { | |
1477 | int r; | |
1478 | ||
1479 | assert(device); | |
1480 | ||
1481 | r = device_read_uevent_file(device); | |
1482 | if (r < 0) | |
1483 | return r; | |
1484 | ||
1485 | r = device_read_db(device); | |
1486 | if (r < 0) | |
1487 | return r; | |
1488 | ||
1489 | if (device->property_devlinks_outdated) { | |
1d88a271 MP |
1490 | _cleanup_free_ char *devlinks = NULL; |
1491 | size_t devlinks_allocated = 0, devlinks_len = 0; | |
57fa1d09 TG |
1492 | const char *devlink; |
1493 | ||
1d88a271 MP |
1494 | for (devlink = sd_device_get_devlink_first(device); devlink; devlink = sd_device_get_devlink_next(device)) { |
1495 | char *e; | |
57fa1d09 | 1496 | |
1d88a271 MP |
1497 | if (!GREEDY_REALLOC(devlinks, devlinks_allocated, devlinks_len + strlen(devlink) + 2)) |
1498 | return -ENOMEM; | |
1499 | if (devlinks_len > 0) | |
1500 | stpcpy(devlinks + devlinks_len++, " "); | |
1501 | e = stpcpy(devlinks + devlinks_len, devlink); | |
1502 | devlinks_len = e - devlinks; | |
1503 | } | |
57fa1d09 TG |
1504 | |
1505 | r = device_add_property_internal(device, "DEVLINKS", devlinks); | |
1506 | if (r < 0) | |
1507 | return r; | |
1508 | ||
1509 | device->property_devlinks_outdated = false; | |
1510 | } | |
1511 | ||
1512 | if (device->property_tags_outdated) { | |
1d88a271 MP |
1513 | _cleanup_free_ char *tags = NULL; |
1514 | size_t tags_allocated = 0, tags_len = 0; | |
57fa1d09 TG |
1515 | const char *tag; |
1516 | ||
1d88a271 MP |
1517 | if (!GREEDY_REALLOC(tags, tags_allocated, 2)) |
1518 | return -ENOMEM; | |
1519 | stpcpy(tags, ":"); | |
1520 | tags_len++; | |
57fa1d09 | 1521 | |
1d88a271 MP |
1522 | for (tag = sd_device_get_tag_first(device); tag; tag = sd_device_get_tag_next(device)) { |
1523 | char *e; | |
57fa1d09 | 1524 | |
817ec8cc | 1525 | if (!GREEDY_REALLOC(tags, tags_allocated, tags_len + strlen(tag) + 2)) |
1d88a271 MP |
1526 | return -ENOMEM; |
1527 | e = stpcpy(stpcpy(tags + tags_len, tag), ":"); | |
1528 | tags_len = e - tags; | |
1529 | } | |
57fa1d09 TG |
1530 | |
1531 | r = device_add_property_internal(device, "TAGS", tags); | |
1532 | if (r < 0) | |
1533 | return r; | |
1534 | ||
1535 | device->property_tags_outdated = false; | |
1536 | } | |
1537 | ||
1538 | return 0; | |
1539 | } | |
1540 | ||
1541 | _public_ const char *sd_device_get_property_first(sd_device *device, const char **_value) { | |
1542 | const char *key; | |
1543 | const char *value; | |
1544 | int r; | |
1545 | ||
1546 | assert_return(device, NULL); | |
1547 | ||
1548 | r = device_properties_prepare(device); | |
1549 | if (r < 0) | |
1550 | return NULL; | |
1551 | ||
1552 | device->properties_iterator_generation = device->properties_generation; | |
1553 | device->properties_iterator = ITERATOR_FIRST; | |
1554 | ||
8927b1da | 1555 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1556 | |
1557 | if (_value) | |
1558 | *_value = value; | |
1559 | ||
1560 | return key; | |
1561 | } | |
1562 | ||
1563 | _public_ const char *sd_device_get_property_next(sd_device *device, const char **_value) { | |
1564 | const char *key; | |
1565 | const char *value; | |
1566 | int r; | |
1567 | ||
1568 | assert_return(device, NULL); | |
1569 | ||
1570 | r = device_properties_prepare(device); | |
1571 | if (r < 0) | |
1572 | return NULL; | |
1573 | ||
1574 | if (device->properties_iterator_generation != device->properties_generation) | |
1575 | return NULL; | |
1576 | ||
8927b1da | 1577 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1578 | |
1579 | if (_value) | |
1580 | *_value = value; | |
1581 | ||
1582 | return key; | |
1583 | } | |
1584 | ||
1585 | static int device_sysattrs_read_all(sd_device *device) { | |
1586 | _cleanup_closedir_ DIR *dir = NULL; | |
1587 | const char *syspath; | |
1588 | struct dirent *dent; | |
1589 | int r; | |
1590 | ||
1591 | assert(device); | |
1592 | ||
1593 | if (device->sysattrs_read) | |
1594 | return 0; | |
1595 | ||
1596 | r = sd_device_get_syspath(device, &syspath); | |
1597 | if (r < 0) | |
1598 | return r; | |
1599 | ||
1600 | dir = opendir(syspath); | |
1601 | if (!dir) | |
1602 | return -errno; | |
1603 | ||
1604 | r = set_ensure_allocated(&device->sysattrs, &string_hash_ops); | |
1605 | if (r < 0) | |
1606 | return r; | |
1607 | ||
8fb3f009 | 1608 | FOREACH_DIRENT_ALL(dent, dir, return -errno) { |
57fa1d09 TG |
1609 | char *path; |
1610 | struct stat statbuf; | |
1611 | ||
1612 | /* only handle symlinks and regular files */ | |
945c2931 | 1613 | if (!IN_SET(dent->d_type, DT_LNK, DT_REG)) |
57fa1d09 TG |
1614 | continue; |
1615 | ||
1616 | path = strjoina(syspath, "/", dent->d_name); | |
1617 | ||
1618 | if (lstat(path, &statbuf) != 0) | |
1619 | continue; | |
1620 | ||
1621 | if (!(statbuf.st_mode & S_IRUSR)) | |
1622 | continue; | |
1623 | ||
1624 | r = set_put_strdup(device->sysattrs, dent->d_name); | |
1625 | if (r < 0) | |
1626 | return r; | |
1627 | } | |
1628 | ||
1629 | device->sysattrs_read = true; | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | _public_ const char *sd_device_get_sysattr_first(sd_device *device) { | |
8927b1da | 1635 | void *v; |
57fa1d09 TG |
1636 | int r; |
1637 | ||
1638 | assert_return(device, NULL); | |
1639 | ||
1640 | if (!device->sysattrs_read) { | |
1641 | r = device_sysattrs_read_all(device); | |
1642 | if (r < 0) { | |
1643 | errno = -r; | |
1644 | return NULL; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | device->sysattrs_iterator = ITERATOR_FIRST; | |
1649 | ||
bccfe92e | 1650 | (void) set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
8927b1da | 1651 | return v; |
57fa1d09 TG |
1652 | } |
1653 | ||
1654 | _public_ const char *sd_device_get_sysattr_next(sd_device *device) { | |
8927b1da DH |
1655 | void *v; |
1656 | ||
57fa1d09 TG |
1657 | assert_return(device, NULL); |
1658 | ||
1659 | if (!device->sysattrs_read) | |
1660 | return NULL; | |
1661 | ||
bccfe92e | 1662 | (void) set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
8927b1da | 1663 | return v; |
57fa1d09 TG |
1664 | } |
1665 | ||
1666 | _public_ int sd_device_has_tag(sd_device *device, const char *tag) { | |
1667 | assert_return(device, -EINVAL); | |
1668 | assert_return(tag, -EINVAL); | |
1669 | ||
1670 | (void) device_read_db(device); | |
1671 | ||
1672 | return !!set_contains(device->tags, tag); | |
1673 | } | |
1674 | ||
1675 | _public_ int sd_device_get_property_value(sd_device *device, const char *key, const char **_value) { | |
1676 | char *value; | |
1677 | int r; | |
1678 | ||
1679 | assert_return(device, -EINVAL); | |
1680 | assert_return(key, -EINVAL); | |
1681 | assert_return(_value, -EINVAL); | |
1682 | ||
1683 | r = device_properties_prepare(device); | |
1684 | if (r < 0) | |
1685 | return r; | |
1686 | ||
1687 | value = ordered_hashmap_get(device->properties, key); | |
1688 | if (!value) | |
1689 | return -ENOENT; | |
1690 | ||
1691 | *_value = value; | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | /* replaces the value if it already exists */ | |
2fe29a46 | 1697 | static int device_add_sysattr_value(sd_device *device, const char *_key, char *value) { |
57fa1d09 | 1698 | _cleanup_free_ char *key = NULL; |
2fe29a46 | 1699 | _cleanup_free_ char *value_old = NULL; |
57fa1d09 TG |
1700 | int r; |
1701 | ||
1702 | assert(device); | |
1703 | assert(_key); | |
1704 | ||
1705 | r = hashmap_ensure_allocated(&device->sysattr_values, &string_hash_ops); | |
1706 | if (r < 0) | |
1707 | return r; | |
1708 | ||
2fe29a46 | 1709 | value_old = hashmap_remove2(device->sysattr_values, _key, (void **)&key); |
57fa1d09 TG |
1710 | if (!key) { |
1711 | key = strdup(_key); | |
1712 | if (!key) | |
1713 | return -ENOMEM; | |
1714 | } | |
1715 | ||
57fa1d09 TG |
1716 | r = hashmap_put(device->sysattr_values, key, value); |
1717 | if (r < 0) | |
1718 | return r; | |
1719 | ||
1720 | key = NULL; | |
57fa1d09 TG |
1721 | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | static int device_get_sysattr_value(sd_device *device, const char *_key, const char **_value) { | |
1726 | const char *key = NULL, *value; | |
1727 | ||
1728 | assert(device); | |
1729 | assert(_key); | |
1730 | ||
1731 | value = hashmap_get2(device->sysattr_values, _key, (void **) &key); | |
1732 | if (!key) | |
1733 | return -ENOENT; | |
1734 | ||
1735 | if (_value) | |
1736 | *_value = value; | |
1737 | ||
1738 | return 0; | |
1739 | } | |
1740 | ||
1741 | /* We cache all sysattr lookups. If an attribute does not exist, it is stored | |
1742 | * with a NULL value in the cache, otherwise the returned string is stored */ | |
1743 | _public_ int sd_device_get_sysattr_value(sd_device *device, const char *sysattr, const char **_value) { | |
1744 | _cleanup_free_ char *value = NULL; | |
1745 | const char *syspath, *cached_value = NULL; | |
1746 | char *path; | |
1747 | struct stat statbuf; | |
1748 | int r; | |
1749 | ||
1750 | assert_return(device, -EINVAL); | |
1751 | assert_return(sysattr, -EINVAL); | |
1752 | ||
1753 | /* look for possibly already cached result */ | |
1754 | r = device_get_sysattr_value(device, sysattr, &cached_value); | |
1755 | if (r != -ENOENT) { | |
1756 | if (r < 0) | |
1757 | return r; | |
1758 | ||
1759 | if (!cached_value) | |
1760 | /* we looked up the sysattr before and it did not exist */ | |
1761 | return -ENOENT; | |
1762 | ||
1763 | if (_value) | |
1764 | *_value = cached_value; | |
1765 | ||
1766 | return 0; | |
1767 | } | |
1768 | ||
1769 | r = sd_device_get_syspath(device, &syspath); | |
1770 | if (r < 0) | |
1771 | return r; | |
1772 | ||
1773 | path = strjoina(syspath, "/", sysattr); | |
1774 | r = lstat(path, &statbuf); | |
1775 | if (r < 0) { | |
1776 | /* remember that we could not access the sysattr */ | |
1777 | r = device_add_sysattr_value(device, sysattr, NULL); | |
1778 | if (r < 0) | |
1779 | return r; | |
1780 | ||
1781 | return -ENOENT; | |
1782 | } else if (S_ISLNK(statbuf.st_mode)) { | |
1783 | /* Some core links return only the last element of the target path, | |
1784 | * these are just values, the paths should not be exposed. */ | |
1785 | if (STR_IN_SET(sysattr, "driver", "subsystem", "module")) { | |
1786 | r = readlink_value(path, &value); | |
1787 | if (r < 0) | |
1788 | return r; | |
1789 | } else | |
1790 | return -EINVAL; | |
1791 | } else if (S_ISDIR(statbuf.st_mode)) { | |
1792 | /* skip directories */ | |
1793 | return -EINVAL; | |
1794 | } else if (!(statbuf.st_mode & S_IRUSR)) { | |
1795 | /* skip non-readable files */ | |
1796 | return -EPERM; | |
1797 | } else { | |
1798 | size_t size; | |
1799 | ||
1800 | /* read attribute value */ | |
1801 | r = read_full_file(path, &value, &size); | |
1802 | if (r < 0) | |
1803 | return r; | |
1804 | ||
1805 | /* drop trailing newlines */ | |
1806 | while (size > 0 && value[--size] == '\n') | |
1807 | value[size] = '\0'; | |
1808 | } | |
1809 | ||
1810 | r = device_add_sysattr_value(device, sysattr, value); | |
1811 | if (r < 0) | |
1812 | return r; | |
1813 | ||
1cc6c93a | 1814 | *_value = TAKE_PTR(value); |
57fa1d09 TG |
1815 | |
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | static void device_remove_sysattr_value(sd_device *device, const char *_key) { | |
1820 | _cleanup_free_ char *key = NULL; | |
1821 | _cleanup_free_ char *value = NULL; | |
1822 | ||
1823 | assert(device); | |
1824 | assert(_key); | |
1825 | ||
1826 | value = hashmap_remove2(device->sysattr_values, _key, (void **) &key); | |
1827 | ||
1828 | return; | |
1829 | } | |
1830 | ||
1831 | /* set the attribute and save it in the cache. If a NULL value is passed the | |
1832 | * attribute is cleared from the cache */ | |
2fe29a46 | 1833 | _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, char *_value) { |
57fa1d09 | 1834 | _cleanup_close_ int fd = -1; |
2fe29a46 | 1835 | _cleanup_free_ char *value = NULL; |
57fa1d09 TG |
1836 | const char *syspath; |
1837 | char *path; | |
2fa4861a | 1838 | size_t len = 0; |
57fa1d09 TG |
1839 | ssize_t size; |
1840 | int r; | |
1841 | ||
1842 | assert_return(device, -EINVAL); | |
1843 | assert_return(sysattr, -EINVAL); | |
1844 | ||
2fe29a46 | 1845 | if (!_value) { |
57fa1d09 TG |
1846 | device_remove_sysattr_value(device, sysattr); |
1847 | ||
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | r = sd_device_get_syspath(device, &syspath); | |
1852 | if (r < 0) | |
1853 | return r; | |
1854 | ||
1855 | path = strjoina(syspath, "/", sysattr); | |
2fa4861a ZJS |
1856 | |
1857 | fd = open(path, O_WRONLY | O_CLOEXEC | O_NOFOLLOW); | |
1858 | if (fd < 0) { | |
1859 | if (errno == ELOOP) | |
1860 | return -EINVAL; | |
1861 | if (errno == EISDIR) | |
1862 | return -EISDIR; | |
1863 | ||
2fe29a46 TG |
1864 | value = strdup(""); |
1865 | if (!value) | |
1866 | return -ENOMEM; | |
1867 | ||
1868 | r = device_add_sysattr_value(device, sysattr, value); | |
57fa1d09 TG |
1869 | if (r < 0) |
1870 | return r; | |
3bd82598 | 1871 | value = NULL; |
57fa1d09 TG |
1872 | |
1873 | return -ENXIO; | |
1874 | } | |
1875 | ||
2fa4861a | 1876 | len = strlen(_value); |
57fa1d09 TG |
1877 | |
1878 | /* drop trailing newlines */ | |
2fa4861a ZJS |
1879 | while (len > 0 && _value[len - 1] == '\n') |
1880 | len --; | |
57fa1d09 TG |
1881 | |
1882 | /* value length is limited to 4k */ | |
2fa4861a | 1883 | if (len > 4096) |
57fa1d09 TG |
1884 | return -EINVAL; |
1885 | ||
2fa4861a | 1886 | value = strndup(_value, len); |
2fe29a46 TG |
1887 | if (!value) |
1888 | return -ENOMEM; | |
1889 | ||
2fa4861a | 1890 | size = write(fd, value, len); |
57fa1d09 TG |
1891 | if (size < 0) |
1892 | return -errno; | |
1893 | ||
2fa4861a | 1894 | if ((size_t)size != len) |
57fa1d09 TG |
1895 | return -EIO; |
1896 | ||
1897 | r = device_add_sysattr_value(device, sysattr, value); | |
1898 | if (r < 0) | |
1899 | return r; | |
2fe29a46 TG |
1900 | value = NULL; |
1901 | ||
57fa1d09 TG |
1902 | return 0; |
1903 | } |