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57fa1d09 TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2008-2012 Kay Sievers <kay@vrfy.org> | |
5 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <ctype.h> | |
57fa1d09 | 22 | #include <net/if.h> |
07630cea | 23 | #include <sys/types.h> |
57fa1d09 | 24 | |
07630cea LP |
25 | #include "sd-device.h" |
26 | ||
27 | #include "device-internal.h" | |
28 | #include "device-private.h" | |
29 | #include "device-util.h" | |
3ffd4af2 | 30 | #include "fd-util.h" |
57fa1d09 TG |
31 | #include "fileio.h" |
32 | #include "hashmap.h" | |
07630cea | 33 | #include "macro.h" |
6bedfcbb | 34 | #include "parse-util.h" |
07630cea | 35 | #include "path-util.h" |
57fa1d09 | 36 | #include "set.h" |
07630cea | 37 | #include "string-util.h" |
57fa1d09 | 38 | #include "strv.h" |
07630cea LP |
39 | #include "strxcpyx.h" |
40 | #include "util.h" | |
57fa1d09 TG |
41 | |
42 | int device_new_aux(sd_device **ret) { | |
43 | _cleanup_device_unref_ sd_device *device = NULL; | |
44 | ||
45 | assert(ret); | |
46 | ||
47 | device = new0(sd_device, 1); | |
48 | if (!device) | |
49 | return -ENOMEM; | |
50 | ||
51 | device->n_ref = 1; | |
52 | device->watch_handle = -1; | |
53 | ||
54 | *ret = device; | |
55 | device = NULL; | |
56 | ||
57 | return 0; | |
58 | } | |
59 | ||
60 | _public_ sd_device *sd_device_ref(sd_device *device) { | |
61 | if (device) | |
62 | assert_se(++ device->n_ref >= 2); | |
63 | ||
64 | return device; | |
65 | } | |
66 | ||
67 | _public_ sd_device *sd_device_unref(sd_device *device) { | |
68 | if (device && -- device->n_ref == 0) { | |
69 | sd_device_unref(device->parent); | |
70 | free(device->syspath); | |
71 | free(device->sysname); | |
72 | free(device->devtype); | |
73 | free(device->devname); | |
74 | free(device->subsystem); | |
75 | free(device->driver); | |
76 | free(device->id_filename); | |
77 | free(device->properties_strv); | |
78 | free(device->properties_nulstr); | |
79 | ||
80 | ordered_hashmap_free_free_free(device->properties); | |
81 | ordered_hashmap_free_free_free(device->properties_db); | |
82 | hashmap_free_free_free(device->sysattr_values); | |
83 | set_free_free(device->sysattrs); | |
84 | set_free_free(device->tags); | |
85 | set_free_free(device->devlinks); | |
86 | ||
87 | free(device); | |
88 | } | |
89 | ||
90 | return NULL; | |
91 | } | |
92 | ||
93 | int device_add_property_aux(sd_device *device, const char *_key, const char *_value, bool db) { | |
94 | OrderedHashmap **properties; | |
95 | ||
96 | assert(device); | |
97 | assert(_key); | |
98 | ||
99 | if (db) | |
100 | properties = &device->properties_db; | |
101 | else | |
102 | properties = &device->properties; | |
103 | ||
104 | if (_value) { | |
105 | _cleanup_free_ char *key = NULL, *value = NULL, *old_key = NULL, *old_value = NULL; | |
106 | int r; | |
107 | ||
108 | r = ordered_hashmap_ensure_allocated(properties, &string_hash_ops); | |
109 | if (r < 0) | |
110 | return r; | |
111 | ||
112 | key = strdup(_key); | |
113 | if (!key) | |
114 | return -ENOMEM; | |
115 | ||
116 | value = strdup(_value); | |
117 | if (!value) | |
118 | return -ENOMEM; | |
119 | ||
120 | old_value = ordered_hashmap_get2(*properties, key, (void**) &old_key); | |
121 | ||
122 | r = ordered_hashmap_replace(*properties, key, value); | |
123 | if (r < 0) | |
124 | return r; | |
125 | ||
126 | key = NULL; | |
127 | value = NULL; | |
128 | } else { | |
129 | _cleanup_free_ char *key = NULL; | |
130 | _cleanup_free_ char *value = NULL; | |
131 | ||
132 | value = ordered_hashmap_remove2(*properties, _key, (void**) &key); | |
133 | } | |
134 | ||
135 | if (!db) { | |
136 | device->properties_generation ++; | |
137 | device->properties_buf_outdated = true; | |
138 | } | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | int device_add_property_internal(sd_device *device, const char *key, const char *value) { | |
144 | return device_add_property_aux(device, key, value, false); | |
145 | } | |
146 | ||
147 | int device_set_syspath(sd_device *device, const char *_syspath, bool verify) { | |
148 | _cleanup_free_ char *syspath = NULL; | |
149 | const char *devpath; | |
150 | int r; | |
151 | ||
152 | assert(device); | |
153 | assert(_syspath); | |
154 | ||
155 | /* must be a subdirectory of /sys */ | |
156 | if (!path_startswith(_syspath, "/sys/")) { | |
157 | log_debug("sd-device: syspath '%s' is not a subdirectory of /sys", _syspath); | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | if (verify) { | |
162 | r = readlink_and_canonicalize(_syspath, &syspath); | |
08232a02 TG |
163 | if (r == -ENOENT) |
164 | /* the device does not exist (any more?) */ | |
165 | return -ENODEV; | |
166 | else if (r == -EINVAL) { | |
57fa1d09 TG |
167 | /* not a symlink */ |
168 | syspath = canonicalize_file_name(_syspath); | |
169 | if (!syspath) { | |
08232a02 TG |
170 | if (errno == ENOENT) |
171 | /* the device does not exist (any more?) */ | |
172 | return -ENODEV; | |
173 | ||
e53fc357 | 174 | return log_debug_errno(errno, "sd-device: could not canonicalize '%s': %m", _syspath); |
57fa1d09 | 175 | } |
08232a02 | 176 | } else if (r < 0) { |
23446f01 | 177 | log_debug_errno(r, "sd-device: could not get target of '%s': %m", _syspath); |
57fa1d09 TG |
178 | return r; |
179 | } | |
180 | ||
181 | if (path_startswith(syspath, "/sys/devices/")) { | |
182 | char *path; | |
183 | ||
184 | /* all 'devices' require an 'uevent' file */ | |
185 | path = strjoina(syspath, "/uevent"); | |
186 | r = access(path, F_OK); | |
187 | if (r < 0) { | |
52d62901 TG |
188 | if (errno == ENOENT) |
189 | /* this is not a valid device */ | |
190 | return -ENODEV; | |
191 | ||
57fa1d09 TG |
192 | log_debug("sd-device: %s does not have an uevent file: %m", syspath); |
193 | return -errno; | |
194 | } | |
195 | } else { | |
196 | /* everything else just just needs to be a directory */ | |
52d62901 TG |
197 | if (!is_dir(syspath, false)) |
198 | return -ENODEV; | |
57fa1d09 TG |
199 | } |
200 | } else { | |
201 | syspath = strdup(_syspath); | |
202 | if (!syspath) | |
203 | return -ENOMEM; | |
204 | } | |
205 | ||
206 | devpath = syspath + strlen("/sys"); | |
207 | ||
208 | r = device_add_property_internal(device, "DEVPATH", devpath); | |
209 | if (r < 0) | |
210 | return r; | |
211 | ||
212 | free(device->syspath); | |
213 | device->syspath = syspath; | |
214 | syspath = NULL; | |
215 | ||
216 | device->devpath = devpath; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | _public_ int sd_device_new_from_syspath(sd_device **ret, const char *syspath) { | |
222 | _cleanup_device_unref_ sd_device *device = NULL; | |
223 | int r; | |
224 | ||
225 | assert_return(ret, -EINVAL); | |
226 | assert_return(syspath, -EINVAL); | |
227 | ||
228 | r = device_new_aux(&device); | |
229 | if (r < 0) | |
230 | return r; | |
231 | ||
232 | r = device_set_syspath(device, syspath, true); | |
233 | if (r < 0) | |
234 | return r; | |
235 | ||
236 | *ret = device; | |
237 | device = NULL; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | _public_ int sd_device_new_from_devnum(sd_device **ret, char type, dev_t devnum) { | |
243 | char *syspath; | |
244 | char id[DECIMAL_STR_MAX(unsigned) * 2 + 1]; | |
245 | ||
246 | assert_return(ret, -EINVAL); | |
247 | assert_return(type == 'b' || type == 'c', -EINVAL); | |
248 | ||
249 | /* use /sys/dev/{block,char}/<maj>:<min> link */ | |
250 | snprintf(id, sizeof(id), "%u:%u", major(devnum), minor(devnum)); | |
251 | ||
252 | syspath = strjoina("/sys/dev/", (type == 'b' ? "block" : "char"), "/", id); | |
253 | ||
254 | return sd_device_new_from_syspath(ret, syspath); | |
255 | } | |
256 | ||
257 | _public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *subsystem, const char *sysname) { | |
258 | char *syspath; | |
259 | ||
260 | assert_return(ret, -EINVAL); | |
261 | assert_return(subsystem, -EINVAL); | |
262 | assert_return(sysname, -EINVAL); | |
263 | ||
264 | if (streq(subsystem, "subsystem")) { | |
265 | syspath = strjoina("/sys/subsystem/", sysname); | |
266 | if (access(syspath, F_OK) >= 0) | |
267 | return sd_device_new_from_syspath(ret, syspath); | |
268 | ||
269 | syspath = strjoina("/sys/bus/", sysname); | |
270 | if (access(syspath, F_OK) >= 0) | |
271 | return sd_device_new_from_syspath(ret, syspath); | |
272 | ||
273 | syspath = strjoina("/sys/class/", sysname); | |
274 | if (access(syspath, F_OK) >= 0) | |
275 | return sd_device_new_from_syspath(ret, syspath); | |
276 | } else if (streq(subsystem, "module")) { | |
277 | syspath = strjoina("/sys/module/", sysname); | |
278 | if (access(syspath, F_OK) >= 0) | |
279 | return sd_device_new_from_syspath(ret, syspath); | |
280 | } else if (streq(subsystem, "drivers")) { | |
281 | char subsys[PATH_MAX]; | |
282 | char *driver; | |
283 | ||
284 | strscpy(subsys, sizeof(subsys), sysname); | |
285 | driver = strchr(subsys, ':'); | |
286 | if (driver) { | |
287 | driver[0] = '\0'; | |
288 | driver++; | |
289 | ||
290 | syspath = strjoina("/sys/subsystem/", subsys, "/drivers/", driver); | |
291 | if (access(syspath, F_OK) >= 0) | |
292 | return sd_device_new_from_syspath(ret, syspath); | |
293 | ||
294 | syspath = strjoina("/sys/bus/", subsys, "/drivers/", driver); | |
295 | if (access(syspath, F_OK) >= 0) | |
296 | return sd_device_new_from_syspath(ret, syspath); | |
297 | } else | |
298 | return -EINVAL; | |
299 | } else { | |
a9ec9f29 KS |
300 | char *name; |
301 | size_t len = 0; | |
302 | ||
303 | /* translate sysname back to sysfs filename */ | |
304 | name = strdupa(sysname); | |
305 | while (name[len] != '\0') { | |
306 | if (name[len] == '/') | |
307 | name[len] = '!'; | |
308 | ||
309 | len ++; | |
310 | } | |
311 | ||
312 | syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name); | |
57fa1d09 TG |
313 | if (access(syspath, F_OK) >= 0) |
314 | return sd_device_new_from_syspath(ret, syspath); | |
315 | ||
a9ec9f29 | 316 | syspath = strjoina("/sys/bus/", subsystem, "/devices/", name); |
57fa1d09 TG |
317 | if (access(syspath, F_OK) >= 0) |
318 | return sd_device_new_from_syspath(ret, syspath); | |
319 | ||
a9ec9f29 | 320 | syspath = strjoina("/sys/class/", subsystem, "/", name); |
57fa1d09 TG |
321 | if (access(syspath, F_OK) >= 0) |
322 | return sd_device_new_from_syspath(ret, syspath); | |
323 | } | |
324 | ||
08232a02 | 325 | return -ENODEV; |
57fa1d09 TG |
326 | } |
327 | ||
328 | int device_set_devtype(sd_device *device, const char *_devtype) { | |
329 | _cleanup_free_ char *devtype = NULL; | |
330 | int r; | |
331 | ||
332 | assert(device); | |
333 | assert(_devtype); | |
334 | ||
335 | devtype = strdup(_devtype); | |
336 | if (!devtype) | |
337 | return -ENOMEM; | |
338 | ||
339 | r = device_add_property_internal(device, "DEVTYPE", devtype); | |
340 | if (r < 0) | |
341 | return r; | |
342 | ||
343 | free(device->devtype); | |
344 | device->devtype = devtype; | |
345 | devtype = NULL; | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | int device_set_ifindex(sd_device *device, const char *_ifindex) { | |
351 | int ifindex, r; | |
352 | ||
353 | assert(device); | |
354 | assert(_ifindex); | |
355 | ||
356 | r = safe_atoi(_ifindex, &ifindex); | |
357 | if (r < 0) | |
358 | return r; | |
359 | ||
360 | if (ifindex <= 0) | |
361 | return -EINVAL; | |
362 | ||
363 | r = device_add_property_internal(device, "IFINDEX", _ifindex); | |
364 | if (r < 0) | |
365 | return r; | |
366 | ||
367 | device->ifindex = ifindex; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | int device_set_devname(sd_device *device, const char *_devname) { | |
373 | _cleanup_free_ char *devname = NULL; | |
374 | int r; | |
375 | ||
376 | assert(device); | |
377 | assert(_devname); | |
378 | ||
379 | if (_devname[0] != '/') { | |
380 | r = asprintf(&devname, "/dev/%s", _devname); | |
381 | if (r < 0) | |
382 | return -ENOMEM; | |
383 | } else { | |
384 | devname = strdup(_devname); | |
385 | if (!devname) | |
386 | return -ENOMEM; | |
387 | } | |
388 | ||
389 | r = device_add_property_internal(device, "DEVNAME", devname); | |
390 | if (r < 0) | |
391 | return r; | |
392 | ||
393 | free(device->devname); | |
394 | device->devname = devname; | |
395 | devname = NULL; | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | int device_set_devmode(sd_device *device, const char *_devmode) { | |
401 | unsigned devmode; | |
402 | int r; | |
403 | ||
404 | assert(device); | |
405 | assert(_devmode); | |
406 | ||
407 | r = safe_atou(_devmode, &devmode); | |
408 | if (r < 0) | |
409 | return r; | |
410 | ||
411 | if (devmode > 07777) | |
412 | return -EINVAL; | |
413 | ||
414 | r = device_add_property_internal(device, "DEVMODE", _devmode); | |
415 | if (r < 0) | |
416 | return r; | |
417 | ||
418 | device->devmode = devmode; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | int device_set_devnum(sd_device *device, const char *major, const char *minor) { | |
424 | unsigned maj = 0, min = 0; | |
425 | int r; | |
426 | ||
427 | assert(device); | |
428 | assert(major); | |
429 | ||
430 | r = safe_atou(major, &maj); | |
431 | if (r < 0) | |
432 | return r; | |
433 | if (!maj) | |
434 | return 0; | |
435 | ||
436 | if (minor) { | |
437 | r = safe_atou(minor, &min); | |
438 | if (r < 0) | |
439 | return r; | |
440 | } | |
441 | ||
442 | r = device_add_property_internal(device, "MAJOR", major); | |
443 | if (r < 0) | |
444 | return r; | |
445 | ||
446 | if (minor) { | |
447 | r = device_add_property_internal(device, "MINOR", minor); | |
448 | if (r < 0) | |
449 | return r; | |
450 | } | |
451 | ||
452 | device->devnum = makedev(maj, min); | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | static int handle_uevent_line(sd_device *device, const char *key, const char *value, const char **major, const char **minor) { | |
458 | int r; | |
459 | ||
460 | assert(device); | |
461 | assert(key); | |
462 | assert(value); | |
463 | assert(major); | |
464 | assert(minor); | |
465 | ||
466 | if (streq(key, "DEVTYPE")) { | |
467 | r = device_set_devtype(device, value); | |
468 | if (r < 0) | |
469 | return r; | |
470 | } else if (streq(key, "IFINDEX")) { | |
471 | r = device_set_ifindex(device, value); | |
472 | if (r < 0) | |
473 | return r; | |
474 | } else if (streq(key, "DEVNAME")) { | |
475 | r = device_set_devname(device, value); | |
476 | if (r < 0) | |
477 | return r; | |
478 | } else if (streq(key, "DEVMODE")) { | |
479 | r = device_set_devmode(device, value); | |
480 | if (r < 0) | |
481 | return r; | |
482 | } else if (streq(key, "MAJOR")) | |
483 | *major = value; | |
484 | else if (streq(key, "MINOR")) | |
485 | *minor = value; | |
486 | else { | |
487 | r = device_add_property_internal(device, key, value); | |
488 | if (r < 0) | |
489 | return r; | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | int device_read_uevent_file(sd_device *device) { | |
496 | _cleanup_free_ char *uevent = NULL; | |
497 | const char *syspath, *key, *value, *major = NULL, *minor = NULL; | |
498 | char *path; | |
499 | size_t uevent_len; | |
500 | unsigned i; | |
501 | int r; | |
502 | ||
503 | enum { | |
504 | PRE_KEY, | |
505 | KEY, | |
506 | PRE_VALUE, | |
507 | VALUE, | |
508 | INVALID_LINE, | |
509 | } state = PRE_KEY; | |
510 | ||
511 | assert(device); | |
512 | ||
513 | if (device->uevent_loaded || device->sealed) | |
514 | return 0; | |
515 | ||
7141e4f6 TG |
516 | device->uevent_loaded = true; |
517 | ||
57fa1d09 TG |
518 | r = sd_device_get_syspath(device, &syspath); |
519 | if (r < 0) | |
520 | return r; | |
521 | ||
522 | path = strjoina(syspath, "/uevent"); | |
523 | ||
524 | r = read_full_file(path, &uevent, &uevent_len); | |
bba06166 TG |
525 | if (r == -EACCES) |
526 | /* empty uevent files may be write-only */ | |
527 | return 0; | |
2a213740 TG |
528 | else if (r == -ENOENT) |
529 | /* some devices may not have uevent files, see set_syspath() */ | |
530 | return 0; | |
bba06166 | 531 | else if (r < 0) { |
e53fc357 | 532 | log_debug_errno(r, "sd-device: failed to read uevent file '%s': %m", path); |
57fa1d09 TG |
533 | return r; |
534 | } | |
535 | ||
536 | for (i = 0; i < uevent_len; i++) { | |
537 | switch (state) { | |
538 | case PRE_KEY: | |
539 | if (!strchr(NEWLINE, uevent[i])) { | |
540 | key = &uevent[i]; | |
541 | ||
542 | state = KEY; | |
543 | } | |
544 | ||
545 | break; | |
546 | case KEY: | |
547 | if (uevent[i] == '=') { | |
548 | uevent[i] = '\0'; | |
549 | ||
550 | state = PRE_VALUE; | |
551 | } else if (strchr(NEWLINE, uevent[i])) { | |
552 | uevent[i] = '\0'; | |
553 | log_debug("sd-device: ignoring invalid uevent line '%s'", key); | |
554 | ||
555 | state = PRE_KEY; | |
556 | } | |
557 | ||
558 | break; | |
559 | case PRE_VALUE: | |
560 | value = &uevent[i]; | |
561 | ||
562 | state = VALUE; | |
563 | ||
564 | break; | |
565 | case VALUE: | |
566 | if (strchr(NEWLINE, uevent[i])) { | |
567 | uevent[i] = '\0'; | |
568 | ||
569 | r = handle_uevent_line(device, key, value, &major, &minor); | |
570 | if (r < 0) | |
19c29853 | 571 | log_debug_errno(r, "sd-device: failed to handle uevent entry '%s=%s': %m", key, value); |
57fa1d09 TG |
572 | |
573 | state = PRE_KEY; | |
574 | } | |
575 | ||
576 | break; | |
577 | default: | |
578 | assert_not_reached("invalid state when parsing uevent file"); | |
579 | } | |
580 | } | |
581 | ||
582 | if (major) { | |
583 | r = device_set_devnum(device, major, minor); | |
584 | if (r < 0) | |
23446f01 | 585 | log_debug_errno(r, "sd-device: could not set 'MAJOR=%s' or 'MINOR=%s' from '%s': %m", major, minor, path); |
57fa1d09 TG |
586 | } |
587 | ||
57fa1d09 TG |
588 | return 0; |
589 | } | |
590 | ||
591 | _public_ int sd_device_get_ifindex(sd_device *device, int *ifindex) { | |
592 | int r; | |
593 | ||
594 | assert_return(device, -EINVAL); | |
595 | assert_return(ifindex, -EINVAL); | |
596 | ||
597 | r = device_read_uevent_file(device); | |
598 | if (r < 0) | |
599 | return r; | |
600 | ||
601 | *ifindex = device->ifindex; | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | _public_ int sd_device_new_from_device_id(sd_device **ret, const char *id) { | |
607 | int r; | |
608 | ||
609 | assert_return(ret, -EINVAL); | |
610 | assert_return(id, -EINVAL); | |
611 | ||
612 | switch (id[0]) { | |
613 | case 'b': | |
614 | case 'c': | |
615 | { | |
616 | char type; | |
617 | int maj, min; | |
618 | ||
619 | r = sscanf(id, "%c%i:%i", &type, &maj, &min); | |
620 | if (r != 3) | |
621 | return -EINVAL; | |
622 | ||
623 | return sd_device_new_from_devnum(ret, type, makedev(maj, min)); | |
624 | } | |
625 | case 'n': | |
626 | { | |
627 | _cleanup_device_unref_ sd_device *device = NULL; | |
628 | _cleanup_close_ int sk = -1; | |
629 | struct ifreq ifr = {}; | |
630 | int ifindex; | |
631 | ||
632 | r = safe_atoi(&id[1], &ifr.ifr_ifindex); | |
633 | if (r < 0) | |
634 | return r; | |
635 | else if (ifr.ifr_ifindex <= 0) | |
636 | return -EINVAL; | |
637 | ||
638 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
639 | if (sk < 0) | |
640 | return -errno; | |
641 | ||
642 | r = ioctl(sk, SIOCGIFNAME, &ifr); | |
643 | if (r < 0) | |
644 | return -errno; | |
645 | ||
646 | r = sd_device_new_from_subsystem_sysname(&device, "net", ifr.ifr_name); | |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
650 | r = sd_device_get_ifindex(device, &ifindex); | |
651 | if (r < 0) | |
652 | return r; | |
653 | ||
08232a02 | 654 | /* this is racey, so we might end up with the wrong device */ |
57fa1d09 TG |
655 | if (ifr.ifr_ifindex != ifindex) |
656 | return -ENODEV; | |
657 | ||
658 | *ret = device; | |
659 | device = NULL; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | case '+': | |
664 | { | |
665 | char subsys[PATH_MAX]; | |
666 | char *sysname; | |
667 | ||
668 | (void)strscpy(subsys, sizeof(subsys), id + 1); | |
669 | sysname = strchr(subsys, ':'); | |
670 | if (!sysname) | |
671 | return -EINVAL; | |
672 | ||
673 | sysname[0] = '\0'; | |
674 | sysname ++; | |
675 | ||
676 | return sd_device_new_from_subsystem_sysname(ret, subsys, sysname); | |
677 | } | |
678 | default: | |
679 | return -EINVAL; | |
680 | } | |
681 | } | |
682 | ||
683 | _public_ int sd_device_get_syspath(sd_device *device, const char **ret) { | |
684 | assert_return(device, -EINVAL); | |
685 | assert_return(ret, -EINVAL); | |
686 | ||
687 | assert(path_startswith(device->syspath, "/sys/")); | |
688 | ||
689 | *ret = device->syspath; | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
694 | static int device_new_from_child(sd_device **ret, sd_device *child) { | |
695 | _cleanup_free_ char *path = NULL; | |
696 | const char *subdir, *syspath; | |
697 | int r; | |
698 | ||
699 | assert(ret); | |
700 | assert(child); | |
701 | ||
702 | r = sd_device_get_syspath(child, &syspath); | |
703 | if (r < 0) | |
704 | return r; | |
705 | ||
706 | path = strdup(syspath); | |
707 | if (!path) | |
708 | return -ENOMEM; | |
709 | subdir = path + strlen("/sys"); | |
710 | ||
711 | for (;;) { | |
712 | char *pos; | |
713 | ||
714 | pos = strrchr(subdir, '/'); | |
715 | if (!pos || pos < subdir + 2) | |
716 | break; | |
717 | ||
718 | *pos = '\0'; | |
719 | ||
720 | r = sd_device_new_from_syspath(ret, path); | |
721 | if (r < 0) | |
722 | continue; | |
723 | ||
724 | return 0; | |
725 | } | |
726 | ||
08232a02 | 727 | return -ENODEV; |
57fa1d09 TG |
728 | } |
729 | ||
730 | _public_ int sd_device_get_parent(sd_device *child, sd_device **ret) { | |
731 | ||
732 | assert_return(ret, -EINVAL); | |
733 | assert_return(child, -EINVAL); | |
734 | ||
735 | if (!child->parent_set) { | |
736 | child->parent_set = true; | |
737 | ||
738 | (void)device_new_from_child(&child->parent, child); | |
739 | } | |
740 | ||
741 | if (!child->parent) | |
742 | return -ENOENT; | |
743 | ||
744 | *ret = child->parent; | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | int device_set_subsystem(sd_device *device, const char *_subsystem) { | |
750 | _cleanup_free_ char *subsystem = NULL; | |
751 | int r; | |
752 | ||
753 | assert(device); | |
754 | assert(_subsystem); | |
755 | ||
756 | subsystem = strdup(_subsystem); | |
757 | if (!subsystem) | |
758 | return -ENOMEM; | |
759 | ||
760 | r = device_add_property_internal(device, "SUBSYSTEM", subsystem); | |
761 | if (r < 0) | |
762 | return r; | |
763 | ||
764 | free(device->subsystem); | |
765 | device->subsystem = subsystem; | |
766 | subsystem = NULL; | |
767 | ||
768 | device->subsystem_set = true; | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) { | |
774 | assert_return(ret, -EINVAL); | |
775 | assert_return(device, -EINVAL); | |
776 | ||
777 | if (!device->subsystem_set) { | |
778 | _cleanup_free_ char *subsystem = NULL; | |
779 | const char *syspath; | |
780 | char *path; | |
781 | int r; | |
782 | ||
783 | /* read 'subsystem' link */ | |
784 | r = sd_device_get_syspath(device, &syspath); | |
785 | if (r < 0) | |
786 | return r; | |
787 | ||
788 | path = strjoina(syspath, "/subsystem"); | |
789 | r = readlink_value(path, &subsystem); | |
790 | if (r >= 0) | |
791 | r = device_set_subsystem(device, subsystem); | |
792 | /* use implicit names */ | |
793 | else if (path_startswith(device->devpath, "/module/")) | |
794 | r = device_set_subsystem(device, "module"); | |
795 | else if (strstr(device->devpath, "/drivers/")) | |
796 | r = device_set_subsystem(device, "drivers"); | |
797 | else if (path_startswith(device->devpath, "/subsystem/") || | |
798 | path_startswith(device->devpath, "/class/") || | |
85091685 | 799 | path_startswith(device->devpath, "/bus/")) |
57fa1d09 | 800 | r = device_set_subsystem(device, "subsystem"); |
4189708a | 801 | if (r < 0 && r != -ENOENT) |
5a917c06 | 802 | return log_debug_errno(r, "sd-device: could not set subsystem for %s: %m", device->devpath); |
57fa1d09 TG |
803 | |
804 | device->subsystem_set = true; | |
805 | } | |
806 | ||
bf4c113e DH |
807 | if (!device->subsystem) |
808 | return -ENOENT; | |
809 | ||
57fa1d09 TG |
810 | *ret = device->subsystem; |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | _public_ int sd_device_get_devtype(sd_device *device, const char **devtype) { | |
816 | int r; | |
817 | ||
818 | assert(devtype); | |
819 | assert(device); | |
820 | ||
821 | r = device_read_uevent_file(device); | |
822 | if (r < 0) | |
823 | return r; | |
824 | ||
825 | *devtype = device->devtype; | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | _public_ int sd_device_get_parent_with_subsystem_devtype(sd_device *child, const char *subsystem, const char *devtype, sd_device **ret) { | |
831 | sd_device *parent = NULL; | |
832 | int r; | |
833 | ||
834 | assert_return(child, -EINVAL); | |
835 | assert_return(subsystem, -EINVAL); | |
836 | ||
837 | r = sd_device_get_parent(child, &parent); | |
838 | while (r >= 0) { | |
839 | const char *parent_subsystem = NULL; | |
840 | const char *parent_devtype = NULL; | |
841 | ||
842 | (void)sd_device_get_subsystem(parent, &parent_subsystem); | |
843 | if (streq_ptr(parent_subsystem, subsystem)) { | |
844 | if (!devtype) | |
845 | break; | |
846 | ||
847 | (void)sd_device_get_devtype(parent, &parent_devtype); | |
848 | if (streq_ptr(parent_devtype, devtype)) | |
849 | break; | |
850 | } | |
851 | r = sd_device_get_parent(parent, &parent); | |
852 | } | |
853 | ||
854 | if (r < 0) | |
855 | return r; | |
856 | ||
857 | *ret = parent; | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | _public_ int sd_device_get_devnum(sd_device *device, dev_t *devnum) { | |
863 | int r; | |
864 | ||
865 | assert_return(device, -EINVAL); | |
866 | assert_return(devnum, -EINVAL); | |
867 | ||
868 | r = device_read_uevent_file(device); | |
869 | if (r < 0) | |
870 | return r; | |
871 | ||
872 | *devnum = device->devnum; | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | int device_set_driver(sd_device *device, const char *_driver) { | |
878 | _cleanup_free_ char *driver = NULL; | |
879 | int r; | |
880 | ||
881 | assert(device); | |
882 | assert(_driver); | |
883 | ||
884 | driver = strdup(_driver); | |
885 | if (!driver) | |
886 | return -ENOMEM; | |
887 | ||
888 | r = device_add_property_internal(device, "DRIVER", driver); | |
889 | if (r < 0) | |
890 | return r; | |
891 | ||
892 | free(device->driver); | |
893 | device->driver = driver; | |
894 | driver = NULL; | |
895 | ||
896 | device->driver_set = true; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | _public_ int sd_device_get_driver(sd_device *device, const char **ret) { | |
902 | assert_return(device, -EINVAL); | |
903 | assert_return(ret, -EINVAL); | |
904 | ||
905 | if (!device->driver_set) { | |
906 | _cleanup_free_ char *driver = NULL; | |
907 | const char *syspath; | |
908 | char *path; | |
909 | int r; | |
910 | ||
911 | r = sd_device_get_syspath(device, &syspath); | |
912 | if (r < 0) | |
913 | return r; | |
914 | ||
915 | path = strjoina(syspath, "/driver"); | |
916 | r = readlink_value(path, &driver); | |
917 | if (r >= 0) { | |
918 | r = device_set_driver(device, driver); | |
919 | if (r < 0) | |
7283a80d TG |
920 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); |
921 | } else if (r == -ENOENT) | |
922 | device->driver_set = true; | |
923 | else | |
924 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); | |
57fa1d09 TG |
925 | } |
926 | ||
bf4c113e DH |
927 | if (!device->driver) |
928 | return -ENOENT; | |
929 | ||
57fa1d09 TG |
930 | *ret = device->driver; |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | _public_ int sd_device_get_devpath(sd_device *device, const char **devpath) { | |
936 | assert_return(device, -EINVAL); | |
937 | assert_return(devpath, -EINVAL); | |
938 | ||
939 | assert(device->devpath); | |
940 | assert(device->devpath[0] == '/'); | |
941 | ||
942 | *devpath = device->devpath; | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | _public_ int sd_device_get_devname(sd_device *device, const char **devname) { | |
948 | int r; | |
949 | ||
950 | assert_return(device, -EINVAL); | |
951 | assert_return(devname, -EINVAL); | |
952 | ||
953 | r = device_read_uevent_file(device); | |
954 | if (r < 0) | |
955 | return r; | |
956 | ||
957 | if (!device->devname) | |
958 | return -ENOENT; | |
959 | ||
960 | assert(path_startswith(device->devname, "/dev/")); | |
961 | ||
962 | *devname = device->devname; | |
963 | ||
964 | return 0; | |
965 | } | |
966 | ||
967 | static int device_set_sysname(sd_device *device) { | |
968 | _cleanup_free_ char *sysname = NULL; | |
afcac065 | 969 | const char *sysnum = NULL; |
57fa1d09 TG |
970 | const char *pos; |
971 | size_t len = 0; | |
972 | ||
973 | pos = strrchr(device->devpath, '/'); | |
974 | if (!pos) | |
975 | return -EINVAL; | |
976 | pos ++; | |
977 | ||
978 | /* devpath is not a root directory */ | |
979 | if (*pos == '\0' || pos <= device->devpath) | |
980 | return -EINVAL; | |
981 | ||
982 | sysname = strdup(pos); | |
983 | if (!sysname) | |
984 | return -ENOMEM; | |
985 | ||
986 | /* some devices have '!' in their name, change that to '/' */ | |
987 | while (sysname[len] != '\0') { | |
988 | if (sysname[len] == '!') | |
989 | sysname[len] = '/'; | |
990 | ||
991 | len ++; | |
992 | } | |
993 | ||
994 | /* trailing number */ | |
995 | while (len > 0 && isdigit(sysname[--len])) | |
996 | sysnum = &sysname[len]; | |
997 | ||
998 | if (len == 0) | |
999 | sysnum = NULL; | |
1000 | ||
1001 | free(device->sysname); | |
1002 | device->sysname = sysname; | |
1003 | sysname = NULL; | |
1004 | ||
1005 | device->sysnum = sysnum; | |
1006 | ||
1007 | device->sysname_set = true; | |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | _public_ int sd_device_get_sysname(sd_device *device, const char **ret) { | |
1013 | int r; | |
1014 | ||
1015 | assert_return(device, -EINVAL); | |
1016 | assert_return(ret, -EINVAL); | |
1017 | ||
1018 | if (!device->sysname_set) { | |
1019 | r = device_set_sysname(device); | |
1020 | if (r < 0) | |
1021 | return r; | |
1022 | } | |
1023 | ||
bf4c113e DH |
1024 | assert_return(device->sysname, -ENOENT); |
1025 | ||
57fa1d09 TG |
1026 | *ret = device->sysname; |
1027 | ||
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | _public_ int sd_device_get_sysnum(sd_device *device, const char **ret) { | |
1032 | int r; | |
1033 | ||
1034 | assert_return(device, -EINVAL); | |
1035 | assert_return(ret, -EINVAL); | |
1036 | ||
1037 | if (!device->sysname_set) { | |
1038 | r = device_set_sysname(device); | |
1039 | if (r < 0) | |
1040 | return r; | |
1041 | } | |
1042 | ||
1043 | *ret = device->sysnum; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static bool is_valid_tag(const char *tag) { | |
1049 | assert(tag); | |
1050 | ||
1051 | return !strchr(tag, ':') && !strchr(tag, ' '); | |
1052 | } | |
1053 | ||
1054 | int device_add_tag(sd_device *device, const char *tag) { | |
1055 | int r; | |
1056 | ||
1057 | assert(device); | |
1058 | assert(tag); | |
1059 | ||
1060 | if (!is_valid_tag(tag)) | |
1061 | return -EINVAL; | |
1062 | ||
1063 | r = set_ensure_allocated(&device->tags, &string_hash_ops); | |
1064 | if (r < 0) | |
1065 | return r; | |
1066 | ||
1067 | r = set_put_strdup(device->tags, tag); | |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | ||
1071 | device->tags_generation ++; | |
1072 | device->property_tags_outdated = true; | |
1073 | ||
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | int device_add_devlink(sd_device *device, const char *devlink) { | |
1078 | int r; | |
1079 | ||
1080 | assert(device); | |
1081 | assert(devlink); | |
1082 | ||
1083 | r = set_ensure_allocated(&device->devlinks, &string_hash_ops); | |
1084 | if (r < 0) | |
1085 | return r; | |
1086 | ||
1087 | r = set_put_strdup(device->devlinks, devlink); | |
1088 | if (r < 0) | |
1089 | return r; | |
1090 | ||
1091 | device->devlinks_generation ++; | |
1092 | device->property_devlinks_outdated = true; | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
1098 | _cleanup_free_ char *key = NULL; | |
1099 | char *value; | |
1100 | ||
1101 | assert(device); | |
1102 | assert(str); | |
1103 | ||
1104 | key = strdup(str); | |
1105 | if (!key) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | value = strchr(key, '='); | |
1109 | if (!value) | |
1110 | return -EINVAL; | |
1111 | ||
1112 | *value = '\0'; | |
1113 | ||
1114 | if (isempty(++value)) | |
1115 | value = NULL; | |
1116 | ||
1117 | return device_add_property_internal(device, key, value); | |
1118 | } | |
1119 | ||
1120 | int device_set_usec_initialized(sd_device *device, const char *initialized) { | |
1121 | uint64_t usec_initialized; | |
1122 | int r; | |
1123 | ||
1124 | assert(device); | |
1125 | assert(initialized); | |
1126 | ||
1127 | r = safe_atou64(initialized, &usec_initialized); | |
1128 | if (r < 0) | |
1129 | return r; | |
1130 | ||
1131 | r = device_add_property_internal(device, "USEC_INITIALIZED", initialized); | |
1132 | if (r < 0) | |
1133 | return r; | |
1134 | ||
1135 | device->usec_initialized = usec_initialized; | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
1141 | char *path; | |
1142 | int r; | |
1143 | ||
1144 | assert(device); | |
1145 | assert(value); | |
1146 | ||
1147 | switch (key) { | |
1148 | case 'G': | |
1149 | r = device_add_tag(device, value); | |
1150 | if (r < 0) | |
1151 | return r; | |
1152 | ||
1153 | break; | |
1154 | case 'S': | |
1155 | path = strjoina("/dev/", value); | |
1156 | r = device_add_devlink(device, path); | |
1157 | if (r < 0) | |
1158 | return r; | |
1159 | ||
1160 | break; | |
1161 | case 'E': | |
1162 | r = device_add_property_internal_from_string(device, value); | |
1163 | if (r < 0) | |
1164 | return r; | |
1165 | ||
1166 | break; | |
1167 | case 'I': | |
1168 | r = device_set_usec_initialized(device, value); | |
1169 | if (r < 0) | |
1170 | return r; | |
1171 | ||
1172 | break; | |
1173 | case 'L': | |
1174 | r = safe_atoi(value, &device->devlink_priority); | |
1175 | if (r < 0) | |
1176 | return r; | |
1177 | ||
1178 | break; | |
1179 | case 'W': | |
1180 | r = safe_atoi(value, &device->watch_handle); | |
1181 | if (r < 0) | |
1182 | return r; | |
1183 | ||
1184 | break; | |
1185 | default: | |
1186 | log_debug("device db: unknown key '%c'", key); | |
1187 | } | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | int device_get_id_filename(sd_device *device, const char **ret) { | |
1193 | assert(device); | |
1194 | assert(ret); | |
1195 | ||
1196 | if (!device->id_filename) { | |
1197 | _cleanup_free_ char *id = NULL; | |
1198 | const char *subsystem; | |
1199 | dev_t devnum; | |
1200 | int ifindex, r; | |
1201 | ||
1202 | r = sd_device_get_subsystem(device, &subsystem); | |
1203 | if (r < 0) | |
1204 | return r; | |
1205 | ||
1206 | r = sd_device_get_devnum(device, &devnum); | |
1207 | if (r < 0) | |
1208 | return r; | |
1209 | ||
1210 | r = sd_device_get_ifindex(device, &ifindex); | |
1211 | if (r < 0) | |
1212 | return r; | |
1213 | ||
1214 | if (major(devnum) > 0) { | |
4189708a TG |
1215 | assert(subsystem); |
1216 | ||
57fa1d09 TG |
1217 | /* use dev_t -- b259:131072, c254:0 */ |
1218 | r = asprintf(&id, "%c%u:%u", | |
1219 | streq(subsystem, "block") ? 'b' : 'c', | |
1220 | major(devnum), minor(devnum)); | |
1221 | if (r < 0) | |
53fae771 | 1222 | return -ENOMEM; |
57fa1d09 TG |
1223 | } else if (ifindex > 0) { |
1224 | /* use netdev ifindex -- n3 */ | |
1225 | r = asprintf(&id, "n%u", ifindex); | |
1226 | if (r < 0) | |
53fae771 | 1227 | return -ENOMEM; |
57fa1d09 TG |
1228 | } else { |
1229 | /* use $subsys:$sysname -- pci:0000:00:1f.2 | |
1230 | * sysname() has '!' translated, get it from devpath | |
1231 | */ | |
1232 | const char *sysname; | |
1233 | ||
1234 | sysname = basename(device->devpath); | |
1235 | if (!sysname) | |
4189708a TG |
1236 | return -EINVAL; |
1237 | ||
1238 | if (!subsystem) | |
57fa1d09 TG |
1239 | return -EINVAL; |
1240 | ||
1241 | r = asprintf(&id, "+%s:%s", subsystem, sysname); | |
1242 | if (r < 0) | |
53fae771 | 1243 | return -ENOMEM; |
57fa1d09 TG |
1244 | } |
1245 | ||
1246 | device->id_filename = id; | |
1247 | id = NULL; | |
1248 | } | |
1249 | ||
1250 | *ret = device->id_filename; | |
1251 | ||
1252 | return 0; | |
1253 | } | |
1254 | ||
107f2e25 | 1255 | int device_read_db_aux(sd_device *device, bool force) { |
57fa1d09 TG |
1256 | _cleanup_free_ char *db = NULL; |
1257 | char *path; | |
1258 | const char *id, *value; | |
1259 | char key; | |
1260 | size_t db_len; | |
1261 | unsigned i; | |
1262 | int r; | |
1263 | ||
1264 | enum { | |
1265 | PRE_KEY, | |
1266 | KEY, | |
1267 | PRE_VALUE, | |
1268 | VALUE, | |
1269 | INVALID_LINE, | |
1270 | } state = PRE_KEY; | |
1271 | ||
107f2e25 | 1272 | if (device->db_loaded || (!force && device->sealed)) |
57fa1d09 TG |
1273 | return 0; |
1274 | ||
7141e4f6 TG |
1275 | device->db_loaded = true; |
1276 | ||
57fa1d09 TG |
1277 | r = device_get_id_filename(device, &id); |
1278 | if (r < 0) | |
1279 | return r; | |
1280 | ||
1281 | path = strjoina("/run/udev/data/", id); | |
1282 | ||
1283 | r = read_full_file(path, &db, &db_len); | |
1284 | if (r < 0) { | |
1285 | if (r == -ENOENT) | |
1286 | return 0; | |
e53fc357 LP |
1287 | else |
1288 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
1289 | } |
1290 | ||
1291 | /* devices with a database entry are initialized */ | |
7e518afa | 1292 | device->is_initialized = true; |
57fa1d09 TG |
1293 | |
1294 | for (i = 0; i < db_len; i++) { | |
1295 | switch (state) { | |
1296 | case PRE_KEY: | |
1297 | if (!strchr(NEWLINE, db[i])) { | |
1298 | key = db[i]; | |
1299 | ||
1300 | state = KEY; | |
1301 | } | |
1302 | ||
1303 | break; | |
1304 | case KEY: | |
1305 | if (db[i] != ':') { | |
1306 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
1307 | ||
1308 | state = INVALID_LINE; | |
1309 | } else { | |
1310 | db[i] = '\0'; | |
1311 | ||
1312 | state = PRE_VALUE; | |
1313 | } | |
1314 | ||
1315 | break; | |
1316 | case PRE_VALUE: | |
1317 | value = &db[i]; | |
1318 | ||
1319 | state = VALUE; | |
1320 | ||
1321 | break; | |
1322 | case INVALID_LINE: | |
1323 | if (strchr(NEWLINE, db[i])) | |
1324 | state = PRE_KEY; | |
1325 | ||
1326 | break; | |
1327 | case VALUE: | |
1328 | if (strchr(NEWLINE, db[i])) { | |
1329 | db[i] = '\0'; | |
1330 | r = handle_db_line(device, key, value); | |
1331 | if (r < 0) | |
19c29853 | 1332 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
1333 | |
1334 | state = PRE_KEY; | |
1335 | } | |
1336 | ||
1337 | break; | |
1338 | default: | |
1339 | assert_not_reached("invalid state when parsing db"); | |
1340 | } | |
1341 | } | |
1342 | ||
57fa1d09 TG |
1343 | return 0; |
1344 | } | |
1345 | ||
107f2e25 TG |
1346 | static int device_read_db(sd_device *device) { |
1347 | return device_read_db_aux(device, false); | |
1348 | } | |
1349 | ||
57fa1d09 TG |
1350 | _public_ int sd_device_get_is_initialized(sd_device *device, int *initialized) { |
1351 | int r; | |
1352 | ||
1353 | assert_return(device, -EINVAL); | |
1354 | assert_return(initialized, -EINVAL); | |
1355 | ||
1356 | r = device_read_db(device); | |
1357 | if (r < 0) | |
1358 | return r; | |
1359 | ||
1360 | *initialized = device->is_initialized; | |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | _public_ int sd_device_get_usec_since_initialized(sd_device *device, uint64_t *usec) { | |
1366 | usec_t now_ts; | |
1367 | int r; | |
1368 | ||
1369 | assert_return(device, -EINVAL); | |
1370 | assert_return(usec, -EINVAL); | |
1371 | ||
1372 | r = device_read_db(device); | |
1373 | if (r < 0) | |
1374 | return r; | |
1375 | ||
1376 | if (!device->is_initialized) | |
1377 | return -EBUSY; | |
1378 | ||
1379 | if (!device->usec_initialized) | |
1380 | return -ENODATA; | |
1381 | ||
1382 | now_ts = now(clock_boottime_or_monotonic()); | |
1383 | ||
1384 | if (now_ts < device->usec_initialized) | |
1385 | return -EIO; | |
1386 | ||
1387 | *usec = now_ts - device->usec_initialized; | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | _public_ const char *sd_device_get_tag_first(sd_device *device) { | |
8927b1da DH |
1393 | void *v; |
1394 | ||
57fa1d09 TG |
1395 | assert_return(device, NULL); |
1396 | ||
1397 | (void) device_read_db(device); | |
1398 | ||
1399 | device->tags_iterator_generation = device->tags_generation; | |
1400 | device->tags_iterator = ITERATOR_FIRST; | |
1401 | ||
8927b1da DH |
1402 | set_iterate(device->tags, &device->tags_iterator, &v); |
1403 | return v; | |
57fa1d09 TG |
1404 | } |
1405 | ||
1406 | _public_ const char *sd_device_get_tag_next(sd_device *device) { | |
8927b1da DH |
1407 | void *v; |
1408 | ||
57fa1d09 TG |
1409 | assert_return(device, NULL); |
1410 | ||
1411 | (void) device_read_db(device); | |
1412 | ||
1413 | if (device->tags_iterator_generation != device->tags_generation) | |
1414 | return NULL; | |
1415 | ||
8927b1da DH |
1416 | set_iterate(device->tags, &device->tags_iterator, &v); |
1417 | return v; | |
57fa1d09 TG |
1418 | } |
1419 | ||
1420 | _public_ const char *sd_device_get_devlink_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->devlinks_iterator_generation = device->devlinks_generation; | |
1428 | device->devlinks_iterator = ITERATOR_FIRST; | |
1429 | ||
8927b1da DH |
1430 | set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
1431 | return v; | |
57fa1d09 TG |
1432 | } |
1433 | ||
1434 | _public_ const char *sd_device_get_devlink_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->devlinks_iterator_generation != device->devlinks_generation) | |
1442 | return NULL; | |
1443 | ||
8927b1da DH |
1444 | set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
1445 | return v; | |
57fa1d09 TG |
1446 | } |
1447 | ||
1448 | static int device_properties_prepare(sd_device *device) { | |
1449 | int r; | |
1450 | ||
1451 | assert(device); | |
1452 | ||
1453 | r = device_read_uevent_file(device); | |
1454 | if (r < 0) | |
1455 | return r; | |
1456 | ||
1457 | r = device_read_db(device); | |
1458 | if (r < 0) | |
1459 | return r; | |
1460 | ||
1461 | if (device->property_devlinks_outdated) { | |
1462 | char *devlinks = NULL; | |
1463 | const char *devlink; | |
1464 | ||
1465 | devlink = sd_device_get_devlink_first(device); | |
1466 | if (devlink) | |
1467 | devlinks = strdupa(devlink); | |
1468 | ||
1469 | while ((devlink = sd_device_get_devlink_next(device))) | |
1470 | devlinks = strjoina(devlinks, " ", devlink); | |
1471 | ||
1472 | r = device_add_property_internal(device, "DEVLINKS", devlinks); | |
1473 | if (r < 0) | |
1474 | return r; | |
1475 | ||
1476 | device->property_devlinks_outdated = false; | |
1477 | } | |
1478 | ||
1479 | if (device->property_tags_outdated) { | |
1480 | char *tags = NULL; | |
1481 | const char *tag; | |
1482 | ||
1483 | tag = sd_device_get_tag_first(device); | |
1484 | if (tag) | |
1485 | tags = strjoina(":", tag); | |
1486 | ||
1487 | while ((tag = sd_device_get_tag_next(device))) | |
1488 | tags = strjoina(tags, ":", tag); | |
1489 | ||
1490 | tags = strjoina(tags, ":"); | |
1491 | ||
1492 | r = device_add_property_internal(device, "TAGS", tags); | |
1493 | if (r < 0) | |
1494 | return r; | |
1495 | ||
1496 | device->property_tags_outdated = false; | |
1497 | } | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | _public_ const char *sd_device_get_property_first(sd_device *device, const char **_value) { | |
1503 | const char *key; | |
1504 | const char *value; | |
1505 | int r; | |
1506 | ||
1507 | assert_return(device, NULL); | |
1508 | ||
1509 | r = device_properties_prepare(device); | |
1510 | if (r < 0) | |
1511 | return NULL; | |
1512 | ||
1513 | device->properties_iterator_generation = device->properties_generation; | |
1514 | device->properties_iterator = ITERATOR_FIRST; | |
1515 | ||
8927b1da | 1516 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1517 | |
1518 | if (_value) | |
1519 | *_value = value; | |
1520 | ||
1521 | return key; | |
1522 | } | |
1523 | ||
1524 | _public_ const char *sd_device_get_property_next(sd_device *device, const char **_value) { | |
1525 | const char *key; | |
1526 | const char *value; | |
1527 | int r; | |
1528 | ||
1529 | assert_return(device, NULL); | |
1530 | ||
1531 | r = device_properties_prepare(device); | |
1532 | if (r < 0) | |
1533 | return NULL; | |
1534 | ||
1535 | if (device->properties_iterator_generation != device->properties_generation) | |
1536 | return NULL; | |
1537 | ||
8927b1da | 1538 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1539 | |
1540 | if (_value) | |
1541 | *_value = value; | |
1542 | ||
1543 | return key; | |
1544 | } | |
1545 | ||
1546 | static int device_sysattrs_read_all(sd_device *device) { | |
1547 | _cleanup_closedir_ DIR *dir = NULL; | |
1548 | const char *syspath; | |
1549 | struct dirent *dent; | |
1550 | int r; | |
1551 | ||
1552 | assert(device); | |
1553 | ||
1554 | if (device->sysattrs_read) | |
1555 | return 0; | |
1556 | ||
1557 | r = sd_device_get_syspath(device, &syspath); | |
1558 | if (r < 0) | |
1559 | return r; | |
1560 | ||
1561 | dir = opendir(syspath); | |
1562 | if (!dir) | |
1563 | return -errno; | |
1564 | ||
1565 | r = set_ensure_allocated(&device->sysattrs, &string_hash_ops); | |
1566 | if (r < 0) | |
1567 | return r; | |
1568 | ||
1569 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
1570 | char *path; | |
1571 | struct stat statbuf; | |
1572 | ||
1573 | /* only handle symlinks and regular files */ | |
1574 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1575 | continue; | |
1576 | ||
1577 | path = strjoina(syspath, "/", dent->d_name); | |
1578 | ||
1579 | if (lstat(path, &statbuf) != 0) | |
1580 | continue; | |
1581 | ||
1582 | if (!(statbuf.st_mode & S_IRUSR)) | |
1583 | continue; | |
1584 | ||
1585 | r = set_put_strdup(device->sysattrs, dent->d_name); | |
1586 | if (r < 0) | |
1587 | return r; | |
1588 | } | |
1589 | ||
1590 | device->sysattrs_read = true; | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | _public_ const char *sd_device_get_sysattr_first(sd_device *device) { | |
8927b1da | 1596 | void *v; |
57fa1d09 TG |
1597 | int r; |
1598 | ||
1599 | assert_return(device, NULL); | |
1600 | ||
1601 | if (!device->sysattrs_read) { | |
1602 | r = device_sysattrs_read_all(device); | |
1603 | if (r < 0) { | |
1604 | errno = -r; | |
1605 | return NULL; | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | device->sysattrs_iterator = ITERATOR_FIRST; | |
1610 | ||
8927b1da DH |
1611 | set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
1612 | return v; | |
57fa1d09 TG |
1613 | } |
1614 | ||
1615 | _public_ const char *sd_device_get_sysattr_next(sd_device *device) { | |
8927b1da DH |
1616 | void *v; |
1617 | ||
57fa1d09 TG |
1618 | assert_return(device, NULL); |
1619 | ||
1620 | if (!device->sysattrs_read) | |
1621 | return NULL; | |
1622 | ||
8927b1da DH |
1623 | set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
1624 | return v; | |
57fa1d09 TG |
1625 | } |
1626 | ||
1627 | _public_ int sd_device_has_tag(sd_device *device, const char *tag) { | |
1628 | assert_return(device, -EINVAL); | |
1629 | assert_return(tag, -EINVAL); | |
1630 | ||
1631 | (void) device_read_db(device); | |
1632 | ||
1633 | return !!set_contains(device->tags, tag); | |
1634 | } | |
1635 | ||
1636 | _public_ int sd_device_get_property_value(sd_device *device, const char *key, const char **_value) { | |
1637 | char *value; | |
1638 | int r; | |
1639 | ||
1640 | assert_return(device, -EINVAL); | |
1641 | assert_return(key, -EINVAL); | |
1642 | assert_return(_value, -EINVAL); | |
1643 | ||
1644 | r = device_properties_prepare(device); | |
1645 | if (r < 0) | |
1646 | return r; | |
1647 | ||
1648 | value = ordered_hashmap_get(device->properties, key); | |
1649 | if (!value) | |
1650 | return -ENOENT; | |
1651 | ||
1652 | *_value = value; | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | /* replaces the value if it already exists */ | |
2fe29a46 | 1658 | static int device_add_sysattr_value(sd_device *device, const char *_key, char *value) { |
57fa1d09 | 1659 | _cleanup_free_ char *key = NULL; |
2fe29a46 | 1660 | _cleanup_free_ char *value_old = NULL; |
57fa1d09 TG |
1661 | int r; |
1662 | ||
1663 | assert(device); | |
1664 | assert(_key); | |
1665 | ||
1666 | r = hashmap_ensure_allocated(&device->sysattr_values, &string_hash_ops); | |
1667 | if (r < 0) | |
1668 | return r; | |
1669 | ||
2fe29a46 | 1670 | value_old = hashmap_remove2(device->sysattr_values, _key, (void **)&key); |
57fa1d09 TG |
1671 | if (!key) { |
1672 | key = strdup(_key); | |
1673 | if (!key) | |
1674 | return -ENOMEM; | |
1675 | } | |
1676 | ||
57fa1d09 TG |
1677 | r = hashmap_put(device->sysattr_values, key, value); |
1678 | if (r < 0) | |
1679 | return r; | |
1680 | ||
1681 | key = NULL; | |
57fa1d09 TG |
1682 | |
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static int device_get_sysattr_value(sd_device *device, const char *_key, const char **_value) { | |
1687 | const char *key = NULL, *value; | |
1688 | ||
1689 | assert(device); | |
1690 | assert(_key); | |
1691 | ||
1692 | value = hashmap_get2(device->sysattr_values, _key, (void **) &key); | |
1693 | if (!key) | |
1694 | return -ENOENT; | |
1695 | ||
1696 | if (_value) | |
1697 | *_value = value; | |
1698 | ||
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | /* We cache all sysattr lookups. If an attribute does not exist, it is stored | |
1703 | * with a NULL value in the cache, otherwise the returned string is stored */ | |
1704 | _public_ int sd_device_get_sysattr_value(sd_device *device, const char *sysattr, const char **_value) { | |
1705 | _cleanup_free_ char *value = NULL; | |
1706 | const char *syspath, *cached_value = NULL; | |
1707 | char *path; | |
1708 | struct stat statbuf; | |
1709 | int r; | |
1710 | ||
1711 | assert_return(device, -EINVAL); | |
1712 | assert_return(sysattr, -EINVAL); | |
1713 | ||
1714 | /* look for possibly already cached result */ | |
1715 | r = device_get_sysattr_value(device, sysattr, &cached_value); | |
1716 | if (r != -ENOENT) { | |
1717 | if (r < 0) | |
1718 | return r; | |
1719 | ||
1720 | if (!cached_value) | |
1721 | /* we looked up the sysattr before and it did not exist */ | |
1722 | return -ENOENT; | |
1723 | ||
1724 | if (_value) | |
1725 | *_value = cached_value; | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | r = sd_device_get_syspath(device, &syspath); | |
1731 | if (r < 0) | |
1732 | return r; | |
1733 | ||
1734 | path = strjoina(syspath, "/", sysattr); | |
1735 | r = lstat(path, &statbuf); | |
1736 | if (r < 0) { | |
1737 | /* remember that we could not access the sysattr */ | |
1738 | r = device_add_sysattr_value(device, sysattr, NULL); | |
1739 | if (r < 0) | |
1740 | return r; | |
1741 | ||
1742 | return -ENOENT; | |
1743 | } else if (S_ISLNK(statbuf.st_mode)) { | |
1744 | /* Some core links return only the last element of the target path, | |
1745 | * these are just values, the paths should not be exposed. */ | |
1746 | if (STR_IN_SET(sysattr, "driver", "subsystem", "module")) { | |
1747 | r = readlink_value(path, &value); | |
1748 | if (r < 0) | |
1749 | return r; | |
1750 | } else | |
1751 | return -EINVAL; | |
1752 | } else if (S_ISDIR(statbuf.st_mode)) { | |
1753 | /* skip directories */ | |
1754 | return -EINVAL; | |
1755 | } else if (!(statbuf.st_mode & S_IRUSR)) { | |
1756 | /* skip non-readable files */ | |
1757 | return -EPERM; | |
1758 | } else { | |
1759 | size_t size; | |
1760 | ||
1761 | /* read attribute value */ | |
1762 | r = read_full_file(path, &value, &size); | |
1763 | if (r < 0) | |
1764 | return r; | |
1765 | ||
1766 | /* drop trailing newlines */ | |
1767 | while (size > 0 && value[--size] == '\n') | |
1768 | value[size] = '\0'; | |
1769 | } | |
1770 | ||
1771 | r = device_add_sysattr_value(device, sysattr, value); | |
1772 | if (r < 0) | |
1773 | return r; | |
1774 | ||
1775 | *_value = value; | |
1776 | value = NULL; | |
1777 | ||
1778 | return 0; | |
1779 | } | |
1780 | ||
1781 | static void device_remove_sysattr_value(sd_device *device, const char *_key) { | |
1782 | _cleanup_free_ char *key = NULL; | |
1783 | _cleanup_free_ char *value = NULL; | |
1784 | ||
1785 | assert(device); | |
1786 | assert(_key); | |
1787 | ||
1788 | value = hashmap_remove2(device->sysattr_values, _key, (void **) &key); | |
1789 | ||
1790 | return; | |
1791 | } | |
1792 | ||
1793 | /* set the attribute and save it in the cache. If a NULL value is passed the | |
1794 | * attribute is cleared from the cache */ | |
2fe29a46 | 1795 | _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, char *_value) { |
57fa1d09 | 1796 | _cleanup_close_ int fd = -1; |
2fe29a46 | 1797 | _cleanup_free_ char *value = NULL; |
57fa1d09 TG |
1798 | const char *syspath; |
1799 | char *path; | |
1800 | struct stat statbuf; | |
1801 | size_t value_len = 0; | |
1802 | ssize_t size; | |
1803 | int r; | |
1804 | ||
1805 | assert_return(device, -EINVAL); | |
1806 | assert_return(sysattr, -EINVAL); | |
1807 | ||
2fe29a46 | 1808 | if (!_value) { |
57fa1d09 TG |
1809 | device_remove_sysattr_value(device, sysattr); |
1810 | ||
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | r = sd_device_get_syspath(device, &syspath); | |
1815 | if (r < 0) | |
1816 | return r; | |
1817 | ||
1818 | path = strjoina(syspath, "/", sysattr); | |
1819 | r = lstat(path, &statbuf); | |
1820 | if (r < 0) { | |
2fe29a46 TG |
1821 | value = strdup(""); |
1822 | if (!value) | |
1823 | return -ENOMEM; | |
1824 | ||
1825 | r = device_add_sysattr_value(device, sysattr, value); | |
57fa1d09 TG |
1826 | if (r < 0) |
1827 | return r; | |
1828 | ||
1829 | return -ENXIO; | |
1830 | } | |
1831 | ||
1832 | if (S_ISLNK(statbuf.st_mode)) | |
1833 | return -EINVAL; | |
1834 | ||
1835 | /* skip directories */ | |
1836 | if (S_ISDIR(statbuf.st_mode)) | |
1837 | return -EISDIR; | |
1838 | ||
1839 | /* skip non-readable files */ | |
1840 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1841 | return -EACCES; | |
1842 | ||
2fe29a46 | 1843 | value_len = strlen(_value); |
57fa1d09 TG |
1844 | |
1845 | /* drop trailing newlines */ | |
24eb4a30 DH |
1846 | while (value_len > 0 && _value[value_len - 1] == '\n') |
1847 | _value[--value_len] = '\0'; | |
57fa1d09 TG |
1848 | |
1849 | /* value length is limited to 4k */ | |
1850 | if (value_len > 4096) | |
1851 | return -EINVAL; | |
1852 | ||
1853 | fd = open(path, O_WRONLY | O_CLOEXEC); | |
1854 | if (fd < 0) | |
1855 | return -errno; | |
1856 | ||
2fe29a46 TG |
1857 | value = strdup(_value); |
1858 | if (!value) | |
1859 | return -ENOMEM; | |
1860 | ||
57fa1d09 TG |
1861 | size = write(fd, value, value_len); |
1862 | if (size < 0) | |
1863 | return -errno; | |
1864 | ||
1865 | if ((size_t)size != value_len) | |
1866 | return -EIO; | |
1867 | ||
1868 | r = device_add_sysattr_value(device, sysattr, value); | |
1869 | if (r < 0) | |
1870 | return r; | |
1871 | ||
2fe29a46 TG |
1872 | value = NULL; |
1873 | ||
57fa1d09 TG |
1874 | return 0; |
1875 | } |