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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
25ac040b | 22 | #include <errno.h> |
f94ea366 | 23 | #include <sys/epoll.h> |
25ac040b LP |
24 | #include <libudev.h> |
25 | ||
87f0e418 | 26 | #include "unit.h" |
5cb5a6ff LP |
27 | #include "device.h" |
28 | #include "strv.h" | |
25ac040b | 29 | #include "log.h" |
9e2f7c11 | 30 | #include "unit-name.h" |
4139c1b2 | 31 | #include "dbus-device.h" |
f6a6225e | 32 | #include "def.h" |
9eb977db | 33 | #include "path-util.h" |
5cb5a6ff | 34 | |
f50e0a01 LP |
35 | static const UnitActiveState state_translation_table[_DEVICE_STATE_MAX] = { |
36 | [DEVICE_DEAD] = UNIT_INACTIVE, | |
73608ed9 | 37 | [DEVICE_PLUGGED] = UNIT_ACTIVE |
f50e0a01 LP |
38 | }; |
39 | ||
8fe914ec LP |
40 | static void device_unset_sysfs(Device *d) { |
41 | Device *first; | |
42 | ||
43 | assert(d); | |
44 | ||
a7f241db LP |
45 | if (!d->sysfs) |
46 | return; | |
47 | ||
48 | /* Remove this unit from the chain of devices which share the | |
49 | * same sysfs path. */ | |
1124fe6f | 50 | first = hashmap_get(UNIT(d)->manager->devices_by_sysfs, d->sysfs); |
a7f241db | 51 | LIST_REMOVE(Device, same_sysfs, first, d); |
8fe914ec | 52 | |
a7f241db | 53 | if (first) |
1124fe6f | 54 | hashmap_remove_and_replace(UNIT(d)->manager->devices_by_sysfs, d->sysfs, first->sysfs, first); |
a7f241db | 55 | else |
1124fe6f | 56 | hashmap_remove(UNIT(d)->manager->devices_by_sysfs, d->sysfs); |
a7f241db LP |
57 | |
58 | free(d->sysfs); | |
59 | d->sysfs = NULL; | |
8fe914ec LP |
60 | } |
61 | ||
faf919f1 LP |
62 | static void device_init(Unit *u) { |
63 | Device *d = DEVICE(u); | |
64 | ||
65 | assert(d); | |
1124fe6f | 66 | assert(UNIT(d)->load_state == UNIT_STUB); |
faf919f1 | 67 | |
8fe914ec LP |
68 | /* In contrast to all other unit types we timeout jobs waiting |
69 | * for devices by default. This is because they otherwise wait | |
35b8ca3a | 70 | * indefinitely for plugged in devices, something which cannot |
8fe914ec LP |
71 | * happen for the other units since their operations time out |
72 | * anyway. */ | |
1124fe6f | 73 | UNIT(d)->job_timeout = DEFAULT_TIMEOUT_USEC; |
c8f4d764 | 74 | |
1124fe6f MS |
75 | UNIT(d)->ignore_on_isolate = true; |
76 | UNIT(d)->ignore_on_snapshot = true; | |
faf919f1 LP |
77 | } |
78 | ||
87f0e418 LP |
79 | static void device_done(Unit *u) { |
80 | Device *d = DEVICE(u); | |
034c6ed7 LP |
81 | |
82 | assert(d); | |
e537352b | 83 | |
8fe914ec | 84 | device_unset_sysfs(d); |
e537352b LP |
85 | } |
86 | ||
f50e0a01 LP |
87 | static void device_set_state(Device *d, DeviceState state) { |
88 | DeviceState old_state; | |
89 | assert(d); | |
5cb5a6ff | 90 | |
f50e0a01 LP |
91 | old_state = d->state; |
92 | d->state = state; | |
5cb5a6ff | 93 | |
e537352b | 94 | if (state != old_state) |
40d50879 | 95 | log_debug("%s changed %s -> %s", |
1124fe6f | 96 | UNIT(d)->id, |
a16e1123 LP |
97 | device_state_to_string(old_state), |
98 | device_state_to_string(state)); | |
f50e0a01 | 99 | |
e2f3b44c | 100 | unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state], true); |
f50e0a01 LP |
101 | } |
102 | ||
103 | static int device_coldplug(Unit *u) { | |
104 | Device *d = DEVICE(u); | |
105 | ||
106 | assert(d); | |
107 | assert(d->state == DEVICE_DEAD); | |
108 | ||
109 | if (d->sysfs) | |
73608ed9 | 110 | device_set_state(d, DEVICE_PLUGGED); |
f50e0a01 LP |
111 | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static void device_dump(Unit *u, FILE *f, const char *prefix) { | |
25ac040b | 116 | Device *d = DEVICE(u); |
5cb5a6ff | 117 | |
25ac040b | 118 | assert(d); |
5cb5a6ff LP |
119 | |
120 | fprintf(f, | |
25ac040b LP |
121 | "%sDevice State: %s\n" |
122 | "%sSysfs Path: %s\n", | |
a16e1123 | 123 | prefix, device_state_to_string(d->state), |
f50e0a01 LP |
124 | prefix, strna(d->sysfs)); |
125 | } | |
126 | ||
127 | static UnitActiveState device_active_state(Unit *u) { | |
128 | assert(u); | |
129 | ||
130 | return state_translation_table[DEVICE(u)->state]; | |
25ac040b LP |
131 | } |
132 | ||
10a94420 LP |
133 | static const char *device_sub_state_to_string(Unit *u) { |
134 | assert(u); | |
135 | ||
a16e1123 | 136 | return device_state_to_string(DEVICE(u)->state); |
10a94420 LP |
137 | } |
138 | ||
8fe914ec | 139 | static int device_add_escaped_name(Unit *u, const char *dn) { |
25ac040b LP |
140 | char *e; |
141 | int r; | |
142 | ||
143 | assert(u); | |
144 | assert(dn); | |
145 | assert(dn[0] == '/'); | |
146 | ||
b0193f1c LP |
147 | e = unit_name_from_path(dn, ".device"); |
148 | if (!e) | |
25ac040b LP |
149 | return -ENOMEM; |
150 | ||
151 | r = unit_add_name(u, e); | |
152 | free(e); | |
153 | ||
154 | if (r < 0 && r != -EEXIST) | |
155 | return r; | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
aab14b13 LP |
160 | static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { |
161 | char *e; | |
162 | Unit *u; | |
163 | ||
164 | assert(m); | |
165 | assert(dn); | |
166 | assert(dn[0] == '/'); | |
167 | assert(_u); | |
168 | ||
b0193f1c LP |
169 | e = unit_name_from_path(dn, ".device"); |
170 | if (!e) | |
aab14b13 LP |
171 | return -ENOMEM; |
172 | ||
173 | u = manager_get_unit(m, e); | |
174 | free(e); | |
175 | ||
176 | if (u) { | |
177 | *_u = u; | |
178 | return 1; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
8fe914ec LP |
184 | static int device_update_unit(Manager *m, struct udev_device *dev, const char *path, bool main) { |
185 | const char *sysfs, *model; | |
25ac040b LP |
186 | Unit *u = NULL; |
187 | int r; | |
25ac040b | 188 | bool delete; |
25ac040b LP |
189 | |
190 | assert(m); | |
191 | ||
7f275a9f LP |
192 | if (!(sysfs = udev_device_get_syspath(dev))) |
193 | return -ENOMEM; | |
194 | ||
8fe914ec | 195 | if ((r = device_find_escape_name(m, path, &u)) < 0) |
aab14b13 | 196 | return r; |
25ac040b | 197 | |
5845b46b | 198 | if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs)) |
8fe914ec | 199 | return -EEXIST; |
25ac040b | 200 | |
aab14b13 LP |
201 | if (!u) { |
202 | delete = true; | |
203 | ||
7d17cfbc MS |
204 | u = unit_new(m, sizeof(Device)); |
205 | if (!u) | |
aab14b13 | 206 | return -ENOMEM; |
25ac040b | 207 | |
7d17cfbc MS |
208 | r = device_add_escaped_name(u, path); |
209 | if (r < 0) | |
25ac040b LP |
210 | goto fail; |
211 | ||
ee6cb288 LP |
212 | unit_add_to_load_queue(u); |
213 | } else | |
214 | delete = false; | |
215 | ||
216 | /* If this was created via some dependency and has not | |
217 | * actually been seen yet ->sysfs will not be | |
218 | * initialized. Hence initialize it if necessary. */ | |
219 | ||
220 | if (!DEVICE(u)->sysfs) { | |
221 | Device *first; | |
222 | ||
25ac040b LP |
223 | if (!(DEVICE(u)->sysfs = strdup(sysfs))) { |
224 | r = -ENOMEM; | |
225 | goto fail; | |
226 | } | |
227 | ||
8fe914ec LP |
228 | if (!m->devices_by_sysfs) |
229 | if (!(m->devices_by_sysfs = hashmap_new(string_hash_func, string_compare_func))) { | |
230 | r = -ENOMEM; | |
231 | goto fail; | |
232 | } | |
25ac040b | 233 | |
8fe914ec LP |
234 | first = hashmap_get(m->devices_by_sysfs, sysfs); |
235 | LIST_PREPEND(Device, same_sysfs, first, DEVICE(u)); | |
236 | ||
237 | if ((r = hashmap_replace(m->devices_by_sysfs, DEVICE(u)->sysfs, first)) < 0) | |
25ac040b | 238 | goto fail; |
ee6cb288 | 239 | } |
8fe914ec | 240 | |
aab14b13 LP |
241 | if ((model = udev_device_get_property_value(dev, "ID_MODEL_FROM_DATABASE")) || |
242 | (model = udev_device_get_property_value(dev, "ID_MODEL"))) { | |
243 | if ((r = unit_set_description(u, model)) < 0) | |
244 | goto fail; | |
4e85aff4 | 245 | } else |
8fe914ec | 246 | if ((r = unit_set_description(u, path)) < 0) |
4e85aff4 | 247 | goto fail; |
aab14b13 | 248 | |
8fe914ec LP |
249 | if (main) { |
250 | /* The additional systemd udev properties we only | |
251 | * interpret for the main object */ | |
252 | const char *wants, *alias; | |
253 | ||
07845c14 KS |
254 | alias = udev_device_get_property_value(dev, "SYSTEMD_ALIAS"); |
255 | if (alias) { | |
256 | char *state, *w; | |
257 | size_t l; | |
258 | ||
259 | FOREACH_WORD_QUOTED(w, l, alias, state) { | |
260 | char *e; | |
261 | ||
262 | e = strndup(w, l); | |
263 | if (!e) { | |
264 | r = -ENOMEM; | |
8fe914ec | 265 | goto fail; |
07845c14 KS |
266 | } |
267 | ||
268 | if (!is_path(e)) { | |
269 | log_warning("SYSTEMD_ALIAS for %s is not a path, ignoring: %s", sysfs, e); | |
270 | free(e); | |
271 | } else { | |
22349cee | 272 | device_update_unit(m, dev, e, false); |
07845c14 | 273 | free(e); |
07845c14 | 274 | } |
b866264a | 275 | } |
8fe914ec | 276 | } |
25ac040b | 277 | |
07845c14 KS |
278 | wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS"); |
279 | if (wants) { | |
8fe914ec LP |
280 | char *state, *w; |
281 | size_t l; | |
25ac040b | 282 | |
8fe914ec LP |
283 | FOREACH_WORD_QUOTED(w, l, wants, state) { |
284 | char *e; | |
285 | ||
07845c14 KS |
286 | e = strndup(w, l); |
287 | if (!e) { | |
8fe914ec LP |
288 | r = -ENOMEM; |
289 | goto fail; | |
290 | } | |
291 | ||
292 | r = unit_add_dependency_by_name(u, UNIT_WANTS, e, NULL, true); | |
293 | free(e); | |
8fe914ec LP |
294 | if (r < 0) |
295 | goto fail; | |
296 | } | |
25ac040b | 297 | } |
a7f241db | 298 | } |
f94ea366 | 299 | |
c1e1601e | 300 | unit_add_to_dbus_queue(u); |
25ac040b LP |
301 | return 0; |
302 | ||
303 | fail: | |
ee5f3479 LP |
304 | log_warning("Failed to load device unit: %s", strerror(-r)); |
305 | ||
25ac040b LP |
306 | if (delete && u) |
307 | unit_free(u); | |
ee5f3479 | 308 | |
25ac040b LP |
309 | return r; |
310 | } | |
311 | ||
8fe914ec LP |
312 | static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) { |
313 | const char *sysfs, *dn; | |
314 | struct udev_list_entry *item = NULL, *first = NULL; | |
315 | ||
316 | assert(m); | |
317 | ||
318 | if (!(sysfs = udev_device_get_syspath(dev))) | |
319 | return -ENOMEM; | |
320 | ||
321 | /* Add the main unit named after the sysfs path */ | |
322 | device_update_unit(m, dev, sysfs, true); | |
323 | ||
324 | /* Add an additional unit for the device node */ | |
325 | if ((dn = udev_device_get_devnode(dev))) | |
326 | device_update_unit(m, dev, dn, false); | |
327 | ||
328 | /* Add additional units for all symlinks */ | |
329 | first = udev_device_get_devlinks_list_entry(dev); | |
330 | udev_list_entry_foreach(item, first) { | |
331 | const char *p; | |
5845b46b | 332 | struct stat st; |
8fe914ec LP |
333 | |
334 | /* Don't bother with the /dev/block links */ | |
335 | p = udev_list_entry_get_name(item); | |
336 | ||
337 | if (path_startswith(p, "/dev/block/") || | |
338 | path_startswith(p, "/dev/char/")) | |
339 | continue; | |
340 | ||
5845b46b LP |
341 | /* Verify that the symlink in the FS actually belongs |
342 | * to this device. This is useful to deal with | |
343 | * conflicting devices, e.g. when two disks want the | |
344 | * same /dev/disk/by-label/xxx link because they have | |
345 | * the same label. We want to make sure that the same | |
346 | * device that won the symlink wins in systemd, so we | |
347 | * check the device node major/minor*/ | |
348 | if (stat(p, &st) >= 0) | |
349 | if ((!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) || | |
350 | st.st_rdev != udev_device_get_devnum(dev)) | |
351 | continue; | |
352 | ||
8fe914ec LP |
353 | device_update_unit(m, dev, p, false); |
354 | } | |
355 | ||
356 | if (update_state) { | |
357 | Device *d, *l; | |
358 | ||
359 | manager_dispatch_load_queue(m); | |
360 | ||
361 | l = hashmap_get(m->devices_by_sysfs, sysfs); | |
362 | LIST_FOREACH(same_sysfs, d, l) | |
363 | device_set_state(d, DEVICE_PLUGGED); | |
364 | } | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
f94ea366 | 369 | static int device_process_path(Manager *m, const char *path, bool update_state) { |
25ac040b LP |
370 | int r; |
371 | struct udev_device *dev; | |
372 | ||
373 | assert(m); | |
374 | assert(path); | |
375 | ||
376 | if (!(dev = udev_device_new_from_syspath(m->udev, path))) { | |
377 | log_warning("Failed to get udev device object from udev for path %s.", path); | |
378 | return -ENOMEM; | |
379 | } | |
380 | ||
f94ea366 | 381 | r = device_process_new_device(m, dev, update_state); |
25ac040b LP |
382 | udev_device_unref(dev); |
383 | return r; | |
384 | } | |
385 | ||
f94ea366 LP |
386 | static int device_process_removed_device(Manager *m, struct udev_device *dev) { |
387 | const char *sysfs; | |
f94ea366 LP |
388 | Device *d; |
389 | ||
390 | assert(m); | |
391 | assert(dev); | |
392 | ||
393 | if (!(sysfs = udev_device_get_syspath(dev))) | |
394 | return -ENOMEM; | |
395 | ||
8fe914ec LP |
396 | /* Remove all units of this sysfs path */ |
397 | while ((d = hashmap_get(m->devices_by_sysfs, sysfs))) { | |
398 | device_unset_sysfs(d); | |
399 | device_set_state(d, DEVICE_DEAD); | |
400 | } | |
f94ea366 | 401 | |
f94ea366 LP |
402 | return 0; |
403 | } | |
404 | ||
a7f241db LP |
405 | static Unit *device_following(Unit *u) { |
406 | Device *d = DEVICE(u); | |
407 | Device *other, *first = NULL; | |
408 | ||
409 | assert(d); | |
410 | ||
ac155bb8 | 411 | if (startswith(u->id, "sys-")) |
a7f241db LP |
412 | return NULL; |
413 | ||
414 | /* Make everybody follow the unit that's named after the sysfs path */ | |
415 | for (other = d->same_sysfs_next; other; other = other->same_sysfs_next) | |
1124fe6f | 416 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
417 | return UNIT(other); |
418 | ||
419 | for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev) { | |
1124fe6f | 420 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
421 | return UNIT(other); |
422 | ||
423 | first = other; | |
424 | } | |
425 | ||
426 | return UNIT(first); | |
427 | } | |
428 | ||
6210e7fc LP |
429 | static int device_following_set(Unit *u, Set **_s) { |
430 | Device *d = DEVICE(u); | |
431 | Device *other; | |
432 | Set *s; | |
433 | int r; | |
434 | ||
435 | assert(d); | |
436 | assert(_s); | |
437 | ||
438 | if (!d->same_sysfs_prev && !d->same_sysfs_next) { | |
439 | *_s = NULL; | |
440 | return 0; | |
441 | } | |
442 | ||
443 | if (!(s = set_new(NULL, NULL))) | |
444 | return -ENOMEM; | |
445 | ||
446 | for (other = d->same_sysfs_next; other; other = other->same_sysfs_next) | |
447 | if ((r = set_put(s, other)) < 0) | |
448 | goto fail; | |
449 | ||
450 | for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev) | |
451 | if ((r = set_put(s, other)) < 0) | |
452 | goto fail; | |
453 | ||
454 | *_s = s; | |
455 | return 1; | |
456 | ||
457 | fail: | |
458 | set_free(s); | |
459 | return r; | |
460 | } | |
461 | ||
25ac040b LP |
462 | static void device_shutdown(Manager *m) { |
463 | assert(m); | |
464 | ||
a16e1123 | 465 | if (m->udev_monitor) { |
f94ea366 | 466 | udev_monitor_unref(m->udev_monitor); |
a16e1123 LP |
467 | m->udev_monitor = NULL; |
468 | } | |
f94ea366 | 469 | |
a16e1123 | 470 | if (m->udev) { |
25ac040b | 471 | udev_unref(m->udev); |
a16e1123 LP |
472 | m->udev = NULL; |
473 | } | |
8fe914ec LP |
474 | |
475 | hashmap_free(m->devices_by_sysfs); | |
476 | m->devices_by_sysfs = NULL; | |
25ac040b LP |
477 | } |
478 | ||
479 | static int device_enumerate(Manager *m) { | |
f94ea366 | 480 | struct epoll_event ev; |
25ac040b LP |
481 | int r; |
482 | struct udev_enumerate *e = NULL; | |
483 | struct udev_list_entry *item = NULL, *first = NULL; | |
484 | ||
485 | assert(m); | |
486 | ||
a16e1123 LP |
487 | if (!m->udev) { |
488 | if (!(m->udev = udev_new())) | |
489 | return -ENOMEM; | |
25ac040b | 490 | |
a16e1123 LP |
491 | if (!(m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"))) { |
492 | r = -ENOMEM; | |
493 | goto fail; | |
494 | } | |
f94ea366 | 495 | |
47ae6e67 LP |
496 | /* This will fail if we are unprivileged, but that |
497 | * should not matter much, as user instances won't run | |
498 | * during boot. */ | |
499 | udev_monitor_set_receive_buffer_size(m->udev_monitor, 128*1024*1024); | |
99448c1f | 500 | |
e1ce2c27 LP |
501 | if (udev_monitor_filter_add_match_tag(m->udev_monitor, "systemd") < 0) { |
502 | r = -ENOMEM; | |
503 | goto fail; | |
504 | } | |
505 | ||
a16e1123 LP |
506 | if (udev_monitor_enable_receiving(m->udev_monitor) < 0) { |
507 | r = -EIO; | |
508 | goto fail; | |
509 | } | |
f94ea366 | 510 | |
a16e1123 LP |
511 | m->udev_watch.type = WATCH_UDEV; |
512 | m->udev_watch.fd = udev_monitor_get_fd(m->udev_monitor); | |
f94ea366 | 513 | |
a16e1123 LP |
514 | zero(ev); |
515 | ev.events = EPOLLIN; | |
516 | ev.data.ptr = &m->udev_watch; | |
f94ea366 | 517 | |
a16e1123 LP |
518 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_watch.fd, &ev) < 0) |
519 | return -errno; | |
520 | } | |
f94ea366 | 521 | |
4f2d528d LP |
522 | if (!(e = udev_enumerate_new(m->udev))) { |
523 | r = -ENOMEM; | |
524 | goto fail; | |
525 | } | |
e1ce2c27 LP |
526 | if (udev_enumerate_add_match_tag(e, "systemd") < 0) { |
527 | r = -EIO; | |
528 | goto fail; | |
529 | } | |
25ac040b | 530 | |
4f2d528d LP |
531 | if (udev_enumerate_scan_devices(e) < 0) { |
532 | r = -EIO; | |
533 | goto fail; | |
534 | } | |
25ac040b | 535 | |
4f2d528d LP |
536 | first = udev_enumerate_get_list_entry(e); |
537 | udev_list_entry_foreach(item, first) | |
538 | device_process_path(m, udev_list_entry_get_name(item), false); | |
25ac040b | 539 | |
4f2d528d | 540 | udev_enumerate_unref(e); |
25ac040b LP |
541 | return 0; |
542 | ||
543 | fail: | |
544 | if (e) | |
545 | udev_enumerate_unref(e); | |
546 | ||
547 | device_shutdown(m); | |
548 | return r; | |
5cb5a6ff LP |
549 | } |
550 | ||
f94ea366 LP |
551 | void device_fd_event(Manager *m, int events) { |
552 | struct udev_device *dev; | |
553 | int r; | |
2958c886 | 554 | const char *action, *ready; |
f94ea366 LP |
555 | |
556 | assert(m); | |
99448c1f KS |
557 | |
558 | if (events != EPOLLIN) { | |
559 | static RATELIMIT_DEFINE(limit, 10*USEC_PER_SEC, 5); | |
560 | ||
561 | if (!ratelimit_test(&limit)) | |
562 | log_error("Failed to get udev event: %m"); | |
2e6081f2 KS |
563 | if (!(events & EPOLLIN)) |
564 | return; | |
99448c1f | 565 | } |
f94ea366 | 566 | |
f94ea366 | 567 | if (!(dev = udev_monitor_receive_device(m->udev_monitor))) { |
99448c1f KS |
568 | /* |
569 | * libudev might filter-out devices which pass the bloom filter, | |
35b8ca3a | 570 | * so getting NULL here is not necessarily an error |
99448c1f | 571 | */ |
f94ea366 LP |
572 | return; |
573 | } | |
574 | ||
575 | if (!(action = udev_device_get_action(dev))) { | |
576 | log_error("Failed to get udev action string."); | |
577 | goto fail; | |
578 | } | |
579 | ||
2958c886 LP |
580 | ready = udev_device_get_property_value(dev, "SYSTEMD_READY"); |
581 | ||
582 | if (streq(action, "remove") || (ready && parse_boolean(ready) == 0)) { | |
f94ea366 LP |
583 | if ((r = device_process_removed_device(m, dev)) < 0) { |
584 | log_error("Failed to process udev device event: %s", strerror(-r)); | |
585 | goto fail; | |
586 | } | |
587 | } else { | |
588 | if ((r = device_process_new_device(m, dev, true)) < 0) { | |
589 | log_error("Failed to process udev device event: %s", strerror(-r)); | |
590 | goto fail; | |
591 | } | |
592 | } | |
593 | ||
594 | fail: | |
595 | udev_device_unref(dev); | |
596 | } | |
597 | ||
a16e1123 LP |
598 | static const char* const device_state_table[_DEVICE_STATE_MAX] = { |
599 | [DEVICE_DEAD] = "dead", | |
73608ed9 | 600 | [DEVICE_PLUGGED] = "plugged" |
a16e1123 LP |
601 | }; |
602 | ||
603 | DEFINE_STRING_TABLE_LOOKUP(device_state, DeviceState); | |
604 | ||
87f0e418 | 605 | const UnitVTable device_vtable = { |
7d17cfbc | 606 | .object_size = sizeof(Device), |
f975e971 LP |
607 | .sections = |
608 | "Unit\0" | |
609 | "Device\0" | |
610 | "Install\0", | |
5cb5a6ff | 611 | |
9e2f7c11 LP |
612 | .no_instances = true, |
613 | ||
faf919f1 LP |
614 | .init = device_init, |
615 | ||
e537352b | 616 | .load = unit_load_fragment_and_dropin_optional, |
034c6ed7 | 617 | .done = device_done, |
f50e0a01 LP |
618 | .coldplug = device_coldplug, |
619 | ||
5cb5a6ff LP |
620 | .dump = device_dump, |
621 | ||
f50e0a01 | 622 | .active_state = device_active_state, |
10a94420 | 623 | .sub_state_to_string = device_sub_state_to_string, |
25ac040b | 624 | |
c4e2ceae | 625 | .bus_interface = "org.freedesktop.systemd1.Device", |
4139c1b2 | 626 | .bus_message_handler = bus_device_message_handler, |
c4e2ceae | 627 | .bus_invalidating_properties = bus_device_invalidating_properties, |
4139c1b2 | 628 | |
a7f241db | 629 | .following = device_following, |
6210e7fc | 630 | .following_set = device_following_set, |
a7f241db | 631 | |
f50e0a01 | 632 | .enumerate = device_enumerate, |
c6918296 MS |
633 | .shutdown = device_shutdown, |
634 | ||
635 | .status_message_formats = { | |
636 | .starting_stopping = { | |
637 | [0] = "Expecting device %s...", | |
638 | }, | |
639 | .finished_start_job = { | |
640 | [JOB_DONE] = "Found device %s.", | |
641 | [JOB_TIMEOUT] = "Timed out waiting for device %s.", | |
642 | }, | |
643 | }, | |
5cb5a6ff | 644 | }; |