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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) |
66870f90 ZJS |
95 | log_debug_unit(UNIT(d)->id, |
96 | "%s changed %s -> %s", UNIT(d)->id, | |
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 | ||
44a6b1b6 | 127 | _pure_ static UnitActiveState device_active_state(Unit *u) { |
f50e0a01 LP |
128 | assert(u); |
129 | ||
130 | return state_translation_table[DEVICE(u)->state]; | |
25ac040b LP |
131 | } |
132 | ||
44a6b1b6 | 133 | _pure_ static const char *device_sub_state_to_string(Unit *u) { |
10a94420 LP |
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 | 283 | FOREACH_WORD_QUOTED(w, l, wants, state) { |
d9abd149 | 284 | char *e, *n; |
8fe914ec | 285 | |
07845c14 KS |
286 | e = strndup(w, l); |
287 | if (!e) { | |
8fe914ec LP |
288 | r = -ENOMEM; |
289 | goto fail; | |
290 | } | |
d9abd149 MT |
291 | n = unit_name_mangle(e); |
292 | if (!n) { | |
293 | r = -ENOMEM; | |
294 | goto fail; | |
295 | } | |
8fe914ec | 296 | free(e); |
d9abd149 MT |
297 | |
298 | r = unit_add_dependency_by_name(u, UNIT_WANTS, n, NULL, true); | |
299 | free(n); | |
8fe914ec LP |
300 | if (r < 0) |
301 | goto fail; | |
302 | } | |
25ac040b | 303 | } |
a7f241db | 304 | } |
f94ea366 | 305 | |
c1e1601e | 306 | unit_add_to_dbus_queue(u); |
25ac040b LP |
307 | return 0; |
308 | ||
309 | fail: | |
ee5f3479 LP |
310 | log_warning("Failed to load device unit: %s", strerror(-r)); |
311 | ||
25ac040b LP |
312 | if (delete && u) |
313 | unit_free(u); | |
ee5f3479 | 314 | |
25ac040b LP |
315 | return r; |
316 | } | |
317 | ||
8fe914ec LP |
318 | static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) { |
319 | const char *sysfs, *dn; | |
320 | struct udev_list_entry *item = NULL, *first = NULL; | |
003ac9d0 | 321 | int r; |
8fe914ec LP |
322 | |
323 | assert(m); | |
324 | ||
325 | if (!(sysfs = udev_device_get_syspath(dev))) | |
326 | return -ENOMEM; | |
327 | ||
328 | /* Add the main unit named after the sysfs path */ | |
003ac9d0 HH |
329 | r = device_update_unit(m, dev, sysfs, true); |
330 | if (r < 0) | |
331 | return r; | |
8fe914ec LP |
332 | |
333 | /* Add an additional unit for the device node */ | |
334 | if ((dn = udev_device_get_devnode(dev))) | |
335 | device_update_unit(m, dev, dn, false); | |
336 | ||
337 | /* Add additional units for all symlinks */ | |
338 | first = udev_device_get_devlinks_list_entry(dev); | |
339 | udev_list_entry_foreach(item, first) { | |
340 | const char *p; | |
5845b46b | 341 | struct stat st; |
8fe914ec LP |
342 | |
343 | /* Don't bother with the /dev/block links */ | |
344 | p = udev_list_entry_get_name(item); | |
345 | ||
346 | if (path_startswith(p, "/dev/block/") || | |
347 | path_startswith(p, "/dev/char/")) | |
348 | continue; | |
349 | ||
5845b46b LP |
350 | /* Verify that the symlink in the FS actually belongs |
351 | * to this device. This is useful to deal with | |
352 | * conflicting devices, e.g. when two disks want the | |
353 | * same /dev/disk/by-label/xxx link because they have | |
354 | * the same label. We want to make sure that the same | |
355 | * device that won the symlink wins in systemd, so we | |
356 | * check the device node major/minor*/ | |
357 | if (stat(p, &st) >= 0) | |
358 | if ((!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) || | |
359 | st.st_rdev != udev_device_get_devnum(dev)) | |
360 | continue; | |
361 | ||
8fe914ec LP |
362 | device_update_unit(m, dev, p, false); |
363 | } | |
364 | ||
365 | if (update_state) { | |
366 | Device *d, *l; | |
367 | ||
368 | manager_dispatch_load_queue(m); | |
369 | ||
370 | l = hashmap_get(m->devices_by_sysfs, sysfs); | |
371 | LIST_FOREACH(same_sysfs, d, l) | |
372 | device_set_state(d, DEVICE_PLUGGED); | |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
f94ea366 | 378 | static int device_process_path(Manager *m, const char *path, bool update_state) { |
25ac040b LP |
379 | int r; |
380 | struct udev_device *dev; | |
381 | ||
382 | assert(m); | |
383 | assert(path); | |
384 | ||
385 | if (!(dev = udev_device_new_from_syspath(m->udev, path))) { | |
386 | log_warning("Failed to get udev device object from udev for path %s.", path); | |
387 | return -ENOMEM; | |
388 | } | |
389 | ||
f94ea366 | 390 | r = device_process_new_device(m, dev, update_state); |
25ac040b LP |
391 | udev_device_unref(dev); |
392 | return r; | |
393 | } | |
394 | ||
f94ea366 LP |
395 | static int device_process_removed_device(Manager *m, struct udev_device *dev) { |
396 | const char *sysfs; | |
f94ea366 LP |
397 | Device *d; |
398 | ||
399 | assert(m); | |
400 | assert(dev); | |
401 | ||
402 | if (!(sysfs = udev_device_get_syspath(dev))) | |
403 | return -ENOMEM; | |
404 | ||
8fe914ec LP |
405 | /* Remove all units of this sysfs path */ |
406 | while ((d = hashmap_get(m->devices_by_sysfs, sysfs))) { | |
407 | device_unset_sysfs(d); | |
408 | device_set_state(d, DEVICE_DEAD); | |
409 | } | |
f94ea366 | 410 | |
f94ea366 LP |
411 | return 0; |
412 | } | |
413 | ||
a7f241db LP |
414 | static Unit *device_following(Unit *u) { |
415 | Device *d = DEVICE(u); | |
416 | Device *other, *first = NULL; | |
417 | ||
418 | assert(d); | |
419 | ||
ac155bb8 | 420 | if (startswith(u->id, "sys-")) |
a7f241db LP |
421 | return NULL; |
422 | ||
423 | /* Make everybody follow the unit that's named after the sysfs path */ | |
424 | for (other = d->same_sysfs_next; other; other = other->same_sysfs_next) | |
1124fe6f | 425 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
426 | return UNIT(other); |
427 | ||
428 | for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev) { | |
1124fe6f | 429 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
430 | return UNIT(other); |
431 | ||
432 | first = other; | |
433 | } | |
434 | ||
435 | return UNIT(first); | |
436 | } | |
437 | ||
6210e7fc LP |
438 | static int device_following_set(Unit *u, Set **_s) { |
439 | Device *d = DEVICE(u); | |
440 | Device *other; | |
441 | Set *s; | |
442 | int r; | |
443 | ||
444 | assert(d); | |
445 | assert(_s); | |
446 | ||
447 | if (!d->same_sysfs_prev && !d->same_sysfs_next) { | |
448 | *_s = NULL; | |
449 | return 0; | |
450 | } | |
451 | ||
452 | if (!(s = set_new(NULL, NULL))) | |
453 | return -ENOMEM; | |
454 | ||
455 | for (other = d->same_sysfs_next; other; other = other->same_sysfs_next) | |
456 | if ((r = set_put(s, other)) < 0) | |
457 | goto fail; | |
458 | ||
459 | for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev) | |
460 | if ((r = set_put(s, other)) < 0) | |
461 | goto fail; | |
462 | ||
463 | *_s = s; | |
464 | return 1; | |
465 | ||
466 | fail: | |
467 | set_free(s); | |
468 | return r; | |
469 | } | |
470 | ||
25ac040b LP |
471 | static void device_shutdown(Manager *m) { |
472 | assert(m); | |
473 | ||
a16e1123 | 474 | if (m->udev_monitor) { |
f94ea366 | 475 | udev_monitor_unref(m->udev_monitor); |
a16e1123 LP |
476 | m->udev_monitor = NULL; |
477 | } | |
f94ea366 | 478 | |
a16e1123 | 479 | if (m->udev) { |
25ac040b | 480 | udev_unref(m->udev); |
a16e1123 LP |
481 | m->udev = NULL; |
482 | } | |
8fe914ec LP |
483 | |
484 | hashmap_free(m->devices_by_sysfs); | |
485 | m->devices_by_sysfs = NULL; | |
25ac040b LP |
486 | } |
487 | ||
488 | static int device_enumerate(Manager *m) { | |
489 | int r; | |
490 | struct udev_enumerate *e = NULL; | |
491 | struct udev_list_entry *item = NULL, *first = NULL; | |
492 | ||
493 | assert(m); | |
494 | ||
a16e1123 | 495 | if (!m->udev) { |
b92bea5d ZJS |
496 | struct epoll_event ev; |
497 | ||
a16e1123 LP |
498 | if (!(m->udev = udev_new())) |
499 | return -ENOMEM; | |
25ac040b | 500 | |
a16e1123 LP |
501 | if (!(m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"))) { |
502 | r = -ENOMEM; | |
503 | goto fail; | |
504 | } | |
f94ea366 | 505 | |
47ae6e67 LP |
506 | /* This will fail if we are unprivileged, but that |
507 | * should not matter much, as user instances won't run | |
508 | * during boot. */ | |
509 | udev_monitor_set_receive_buffer_size(m->udev_monitor, 128*1024*1024); | |
99448c1f | 510 | |
e1ce2c27 LP |
511 | if (udev_monitor_filter_add_match_tag(m->udev_monitor, "systemd") < 0) { |
512 | r = -ENOMEM; | |
513 | goto fail; | |
514 | } | |
515 | ||
a16e1123 LP |
516 | if (udev_monitor_enable_receiving(m->udev_monitor) < 0) { |
517 | r = -EIO; | |
518 | goto fail; | |
519 | } | |
f94ea366 | 520 | |
a16e1123 LP |
521 | m->udev_watch.type = WATCH_UDEV; |
522 | m->udev_watch.fd = udev_monitor_get_fd(m->udev_monitor); | |
f94ea366 | 523 | |
a16e1123 LP |
524 | zero(ev); |
525 | ev.events = EPOLLIN; | |
526 | ev.data.ptr = &m->udev_watch; | |
f94ea366 | 527 | |
a16e1123 LP |
528 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_watch.fd, &ev) < 0) |
529 | return -errno; | |
530 | } | |
f94ea366 | 531 | |
4f2d528d LP |
532 | if (!(e = udev_enumerate_new(m->udev))) { |
533 | r = -ENOMEM; | |
534 | goto fail; | |
535 | } | |
e1ce2c27 LP |
536 | if (udev_enumerate_add_match_tag(e, "systemd") < 0) { |
537 | r = -EIO; | |
538 | goto fail; | |
539 | } | |
25ac040b | 540 | |
4f2d528d LP |
541 | if (udev_enumerate_scan_devices(e) < 0) { |
542 | r = -EIO; | |
543 | goto fail; | |
544 | } | |
25ac040b | 545 | |
4f2d528d LP |
546 | first = udev_enumerate_get_list_entry(e); |
547 | udev_list_entry_foreach(item, first) | |
548 | device_process_path(m, udev_list_entry_get_name(item), false); | |
25ac040b | 549 | |
4f2d528d | 550 | udev_enumerate_unref(e); |
25ac040b LP |
551 | return 0; |
552 | ||
553 | fail: | |
554 | if (e) | |
555 | udev_enumerate_unref(e); | |
556 | ||
557 | device_shutdown(m); | |
558 | return r; | |
5cb5a6ff LP |
559 | } |
560 | ||
f94ea366 LP |
561 | void device_fd_event(Manager *m, int events) { |
562 | struct udev_device *dev; | |
563 | int r; | |
2958c886 | 564 | const char *action, *ready; |
f94ea366 LP |
565 | |
566 | assert(m); | |
99448c1f KS |
567 | |
568 | if (events != EPOLLIN) { | |
569 | static RATELIMIT_DEFINE(limit, 10*USEC_PER_SEC, 5); | |
570 | ||
571 | if (!ratelimit_test(&limit)) | |
572 | log_error("Failed to get udev event: %m"); | |
2e6081f2 KS |
573 | if (!(events & EPOLLIN)) |
574 | return; | |
99448c1f | 575 | } |
f94ea366 | 576 | |
f94ea366 | 577 | if (!(dev = udev_monitor_receive_device(m->udev_monitor))) { |
99448c1f KS |
578 | /* |
579 | * libudev might filter-out devices which pass the bloom filter, | |
35b8ca3a | 580 | * so getting NULL here is not necessarily an error |
99448c1f | 581 | */ |
f94ea366 LP |
582 | return; |
583 | } | |
584 | ||
585 | if (!(action = udev_device_get_action(dev))) { | |
586 | log_error("Failed to get udev action string."); | |
587 | goto fail; | |
588 | } | |
589 | ||
2958c886 LP |
590 | ready = udev_device_get_property_value(dev, "SYSTEMD_READY"); |
591 | ||
592 | if (streq(action, "remove") || (ready && parse_boolean(ready) == 0)) { | |
f94ea366 LP |
593 | if ((r = device_process_removed_device(m, dev)) < 0) { |
594 | log_error("Failed to process udev device event: %s", strerror(-r)); | |
595 | goto fail; | |
596 | } | |
597 | } else { | |
598 | if ((r = device_process_new_device(m, dev, true)) < 0) { | |
599 | log_error("Failed to process udev device event: %s", strerror(-r)); | |
600 | goto fail; | |
601 | } | |
602 | } | |
603 | ||
604 | fail: | |
605 | udev_device_unref(dev); | |
606 | } | |
607 | ||
a16e1123 LP |
608 | static const char* const device_state_table[_DEVICE_STATE_MAX] = { |
609 | [DEVICE_DEAD] = "dead", | |
73608ed9 | 610 | [DEVICE_PLUGGED] = "plugged" |
a16e1123 LP |
611 | }; |
612 | ||
613 | DEFINE_STRING_TABLE_LOOKUP(device_state, DeviceState); | |
614 | ||
87f0e418 | 615 | const UnitVTable device_vtable = { |
7d17cfbc | 616 | .object_size = sizeof(Device), |
f975e971 LP |
617 | .sections = |
618 | "Unit\0" | |
619 | "Device\0" | |
620 | "Install\0", | |
5cb5a6ff | 621 | |
9e2f7c11 LP |
622 | .no_instances = true, |
623 | ||
faf919f1 LP |
624 | .init = device_init, |
625 | ||
e537352b | 626 | .load = unit_load_fragment_and_dropin_optional, |
034c6ed7 | 627 | .done = device_done, |
f50e0a01 LP |
628 | .coldplug = device_coldplug, |
629 | ||
5cb5a6ff LP |
630 | .dump = device_dump, |
631 | ||
f50e0a01 | 632 | .active_state = device_active_state, |
10a94420 | 633 | .sub_state_to_string = device_sub_state_to_string, |
25ac040b | 634 | |
c4e2ceae | 635 | .bus_interface = "org.freedesktop.systemd1.Device", |
4139c1b2 | 636 | .bus_message_handler = bus_device_message_handler, |
c4e2ceae | 637 | .bus_invalidating_properties = bus_device_invalidating_properties, |
4139c1b2 | 638 | |
a7f241db | 639 | .following = device_following, |
6210e7fc | 640 | .following_set = device_following_set, |
a7f241db | 641 | |
f50e0a01 | 642 | .enumerate = device_enumerate, |
c6918296 MS |
643 | .shutdown = device_shutdown, |
644 | ||
645 | .status_message_formats = { | |
646 | .starting_stopping = { | |
647 | [0] = "Expecting device %s...", | |
648 | }, | |
649 | .finished_start_job = { | |
650 | [JOB_DONE] = "Found device %s.", | |
651 | [JOB_TIMEOUT] = "Timed out waiting for device %s.", | |
652 | }, | |
653 | }, | |
5cb5a6ff | 654 | }; |