]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
25ac040b | 3 | #include <errno.h> |
f94ea366 | 4 | #include <sys/epoll.h> |
25ac040b | 5 | |
b5efdb8a | 6 | #include "alloc-util.h" |
88116909 | 7 | #include "bus-error.h" |
4139c1b2 | 8 | #include "dbus-device.h" |
4366e598 | 9 | #include "device-private.h" |
4366e598 | 10 | #include "device-util.h" |
6bedfcbb | 11 | #include "device.h" |
07630cea | 12 | #include "log.h" |
6bedfcbb | 13 | #include "parse-util.h" |
9eb977db | 14 | #include "path-util.h" |
8fcde012 | 15 | #include "stat-util.h" |
07630cea LP |
16 | #include "string-util.h" |
17 | #include "swap.h" | |
07630cea | 18 | #include "unit-name.h" |
9670d583 | 19 | #include "unit.h" |
5cb5a6ff | 20 | |
f50e0a01 LP |
21 | static const UnitActiveState state_translation_table[_DEVICE_STATE_MAX] = { |
22 | [DEVICE_DEAD] = UNIT_INACTIVE, | |
628c89cc LP |
23 | [DEVICE_TENTATIVE] = UNIT_ACTIVATING, |
24 | [DEVICE_PLUGGED] = UNIT_ACTIVE, | |
f50e0a01 LP |
25 | }; |
26 | ||
d0955f00 | 27 | static int device_dispatch_io(sd_device_monitor *monitor, sd_device *dev, void *userdata); |
66f3fdbb | 28 | static void device_update_found_one(Device *d, DeviceFound found, DeviceFound mask); |
718db961 | 29 | |
8fe914ec | 30 | static void device_unset_sysfs(Device *d) { |
f1421cc6 | 31 | Hashmap *devices; |
8fe914ec LP |
32 | Device *first; |
33 | ||
34 | assert(d); | |
35 | ||
a7f241db LP |
36 | if (!d->sysfs) |
37 | return; | |
38 | ||
39 | /* Remove this unit from the chain of devices which share the | |
40 | * same sysfs path. */ | |
f1421cc6 LP |
41 | devices = UNIT(d)->manager->devices_by_sysfs; |
42 | first = hashmap_get(devices, d->sysfs); | |
71fda00f | 43 | LIST_REMOVE(same_sysfs, first, d); |
8fe914ec | 44 | |
a7f241db | 45 | if (first) |
f1421cc6 | 46 | hashmap_remove_and_replace(devices, d->sysfs, first->sysfs, first); |
a7f241db | 47 | else |
f1421cc6 | 48 | hashmap_remove(devices, d->sysfs); |
a7f241db | 49 | |
a1e58e8e | 50 | d->sysfs = mfree(d->sysfs); |
8fe914ec LP |
51 | } |
52 | ||
628c89cc | 53 | static int device_set_sysfs(Device *d, const char *sysfs) { |
ccd419f0 | 54 | _cleanup_free_ char *copy = NULL; |
628c89cc | 55 | Device *first; |
628c89cc LP |
56 | int r; |
57 | ||
58 | assert(d); | |
59 | ||
60 | if (streq_ptr(d->sysfs, sysfs)) | |
61 | return 0; | |
62 | ||
548f6937 | 63 | r = hashmap_ensure_allocated(&UNIT(d)->manager->devices_by_sysfs, &path_hash_ops); |
628c89cc LP |
64 | if (r < 0) |
65 | return r; | |
66 | ||
67 | copy = strdup(sysfs); | |
68 | if (!copy) | |
69 | return -ENOMEM; | |
70 | ||
71 | device_unset_sysfs(d); | |
72 | ||
73 | first = hashmap_get(UNIT(d)->manager->devices_by_sysfs, sysfs); | |
74 | LIST_PREPEND(same_sysfs, first, d); | |
75 | ||
76 | r = hashmap_replace(UNIT(d)->manager->devices_by_sysfs, copy, first); | |
77 | if (r < 0) { | |
78 | LIST_REMOVE(same_sysfs, first, d); | |
628c89cc LP |
79 | return r; |
80 | } | |
81 | ||
ccd419f0 | 82 | d->sysfs = TAKE_PTR(copy); |
628c89cc LP |
83 | return 0; |
84 | } | |
85 | ||
faf919f1 LP |
86 | static void device_init(Unit *u) { |
87 | Device *d = DEVICE(u); | |
88 | ||
89 | assert(d); | |
1124fe6f | 90 | assert(UNIT(d)->load_state == UNIT_STUB); |
faf919f1 | 91 | |
8fe914ec LP |
92 | /* In contrast to all other unit types we timeout jobs waiting |
93 | * for devices by default. This is because they otherwise wait | |
35b8ca3a | 94 | * indefinitely for plugged in devices, something which cannot |
8fe914ec LP |
95 | * happen for the other units since their operations time out |
96 | * anyway. */ | |
d9732d78 | 97 | u->job_running_timeout = u->manager->default_timeout_start_usec; |
c8f4d764 | 98 | |
f1421cc6 | 99 | u->ignore_on_isolate = true; |
66f3fdbb LP |
100 | |
101 | d->deserialized_state = _DEVICE_STATE_INVALID; | |
faf919f1 LP |
102 | } |
103 | ||
87f0e418 LP |
104 | static void device_done(Unit *u) { |
105 | Device *d = DEVICE(u); | |
034c6ed7 LP |
106 | |
107 | assert(d); | |
e537352b | 108 | |
8fe914ec | 109 | device_unset_sysfs(d); |
88116909 | 110 | d->wants_property = strv_free(d->wants_property); |
e537352b LP |
111 | } |
112 | ||
f50e0a01 LP |
113 | static void device_set_state(Device *d, DeviceState state) { |
114 | DeviceState old_state; | |
115 | assert(d); | |
5cb5a6ff | 116 | |
f50e0a01 LP |
117 | old_state = d->state; |
118 | d->state = state; | |
5cb5a6ff | 119 | |
244f8055 LP |
120 | if (state == DEVICE_DEAD) |
121 | device_unset_sysfs(d); | |
122 | ||
e537352b | 123 | if (state != old_state) |
f2341e0a | 124 | log_unit_debug(UNIT(d), "Changed %s -> %s", device_state_to_string(old_state), device_state_to_string(state)); |
f50e0a01 | 125 | |
2ad2e41a | 126 | unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state], 0); |
f50e0a01 LP |
127 | } |
128 | ||
be847e82 | 129 | static int device_coldplug(Unit *u) { |
f50e0a01 LP |
130 | Device *d = DEVICE(u); |
131 | ||
132 | assert(d); | |
133 | assert(d->state == DEVICE_DEAD); | |
134 | ||
66f3fdbb | 135 | /* First, let's put the deserialized state and found mask into effect, if we have it. */ |
918e6f1c | 136 | |
66f3fdbb LP |
137 | if (d->deserialized_state < 0 || |
138 | (d->deserialized_state == d->state && | |
139 | d->deserialized_found == d->found)) | |
140 | return 0; | |
f50e0a01 | 141 | |
66f3fdbb LP |
142 | d->found = d->deserialized_found; |
143 | device_set_state(d, d->deserialized_state); | |
f50e0a01 LP |
144 | return 0; |
145 | } | |
146 | ||
66f3fdbb LP |
147 | static void device_catchup(Unit *u) { |
148 | Device *d = DEVICE(u); | |
149 | ||
150 | assert(d); | |
151 | ||
152 | /* Second, let's update the state with the enumerated state if it's different */ | |
153 | if (d->enumerated_found == d->found) | |
154 | return; | |
155 | ||
156 | device_update_found_one(d, d->enumerated_found, DEVICE_FOUND_MASK); | |
157 | } | |
158 | ||
75d0aba4 YW |
159 | static const struct { |
160 | DeviceFound flag; | |
161 | const char *name; | |
162 | } device_found_map[] = { | |
66f3fdbb LP |
163 | { DEVICE_FOUND_UDEV, "found-udev" }, |
164 | { DEVICE_FOUND_MOUNT, "found-mount" }, | |
165 | { DEVICE_FOUND_SWAP, "found-swap" }, | |
75d0aba4 YW |
166 | }; |
167 | ||
168 | static int device_found_to_string_many(DeviceFound flags, char **ret) { | |
169 | _cleanup_free_ char *s = NULL; | |
170 | unsigned i; | |
171 | ||
172 | assert(ret); | |
173 | ||
69ce73d1 | 174 | for (i = 0; i < ELEMENTSOF(device_found_map); i++) { |
6e0f878e | 175 | if (!FLAGS_SET(flags, device_found_map[i].flag)) |
75d0aba4 YW |
176 | continue; |
177 | ||
178 | if (!strextend_with_separator(&s, ",", device_found_map[i].name, NULL)) | |
179 | return -ENOMEM; | |
180 | } | |
181 | ||
182 | *ret = TAKE_PTR(s); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | static int device_found_from_string_many(const char *name, DeviceFound *ret) { | |
188 | DeviceFound flags = 0; | |
189 | int r; | |
190 | ||
191 | assert(ret); | |
192 | ||
193 | for (;;) { | |
194 | _cleanup_free_ char *word = NULL; | |
195 | DeviceFound f = 0; | |
196 | unsigned i; | |
197 | ||
198 | r = extract_first_word(&name, &word, ",", 0); | |
199 | if (r < 0) | |
200 | return r; | |
201 | if (r == 0) | |
202 | break; | |
203 | ||
69ce73d1 | 204 | for (i = 0; i < ELEMENTSOF(device_found_map); i++) |
75d0aba4 YW |
205 | if (streq(word, device_found_map[i].name)) { |
206 | f = device_found_map[i].flag; | |
207 | break; | |
208 | } | |
209 | ||
210 | if (f == 0) | |
211 | return -EINVAL; | |
212 | ||
213 | flags |= f; | |
214 | } | |
215 | ||
216 | *ret = flags; | |
217 | return 0; | |
218 | } | |
219 | ||
f6200941 | 220 | static int device_serialize(Unit *u, FILE *f, FDSet *fds) { |
75d0aba4 | 221 | _cleanup_free_ char *s = NULL; |
f6200941 LP |
222 | Device *d = DEVICE(u); |
223 | ||
224 | assert(u); | |
225 | assert(f); | |
226 | assert(fds); | |
227 | ||
228 | unit_serialize_item(u, f, "state", device_state_to_string(d->state)); | |
75d0aba4 | 229 | |
43ba7d71 LP |
230 | if (device_found_to_string_many(d->found, &s) >= 0) |
231 | unit_serialize_item(u, f, "found", s); | |
0108f6ec DM |
232 | |
233 | return 0; | |
f6200941 LP |
234 | } |
235 | ||
236 | static int device_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
237 | Device *d = DEVICE(u); | |
75d0aba4 | 238 | int r; |
f6200941 LP |
239 | |
240 | assert(u); | |
241 | assert(key); | |
242 | assert(value); | |
243 | assert(fds); | |
244 | ||
245 | if (streq(key, "state")) { | |
246 | DeviceState state; | |
247 | ||
248 | state = device_state_from_string(value); | |
249 | if (state < 0) | |
8bb2c8c9 | 250 | log_unit_debug(u, "Failed to parse state value, ignoring: %s", value); |
f6200941 LP |
251 | else |
252 | d->deserialized_state = state; | |
918e6f1c FB |
253 | |
254 | } else if (streq(key, "found")) { | |
66f3fdbb | 255 | r = device_found_from_string_many(value, &d->deserialized_found); |
75d0aba4 | 256 | if (r < 0) |
5e1ee764 | 257 | log_unit_debug_errno(u, r, "Failed to parse found value '%s', ignoring: %m", value); |
918e6f1c | 258 | |
f6200941 | 259 | } else |
f2341e0a | 260 | log_unit_debug(u, "Unknown serialization key: %s", key); |
f6200941 LP |
261 | |
262 | return 0; | |
263 | } | |
264 | ||
f50e0a01 | 265 | static void device_dump(Unit *u, FILE *f, const char *prefix) { |
25ac040b | 266 | Device *d = DEVICE(u); |
4d86c235 | 267 | _cleanup_free_ char *s = NULL; |
5cb5a6ff | 268 | |
25ac040b | 269 | assert(d); |
5cb5a6ff | 270 | |
4d86c235 ZJS |
271 | (void) device_found_to_string_many(d->found, &s); |
272 | ||
5cb5a6ff | 273 | fprintf(f, |
25ac040b | 274 | "%sDevice State: %s\n" |
4d86c235 ZJS |
275 | "%sSysfs Path: %s\n" |
276 | "%sFound: %s\n", | |
a16e1123 | 277 | prefix, device_state_to_string(d->state), |
4d86c235 ZJS |
278 | prefix, strna(d->sysfs), |
279 | prefix, strna(s)); | |
88116909 LP |
280 | |
281 | if (!strv_isempty(d->wants_property)) { | |
282 | char **i; | |
283 | ||
284 | STRV_FOREACH(i, d->wants_property) | |
285 | fprintf(f, "%sudev SYSTEMD_WANTS: %s\n", | |
286 | prefix, *i); | |
287 | } | |
f50e0a01 LP |
288 | } |
289 | ||
44a6b1b6 | 290 | _pure_ static UnitActiveState device_active_state(Unit *u) { |
f50e0a01 LP |
291 | assert(u); |
292 | ||
293 | return state_translation_table[DEVICE(u)->state]; | |
25ac040b LP |
294 | } |
295 | ||
44a6b1b6 | 296 | _pure_ static const char *device_sub_state_to_string(Unit *u) { |
10a94420 LP |
297 | assert(u); |
298 | ||
a16e1123 | 299 | return device_state_to_string(DEVICE(u)->state); |
10a94420 LP |
300 | } |
301 | ||
4366e598 YW |
302 | static int device_update_description(Unit *u, sd_device *dev, const char *path) { |
303 | const char *model, *label; | |
628c89cc | 304 | int r; |
965e5c5d LP |
305 | |
306 | assert(u); | |
307 | assert(dev); | |
308 | assert(path); | |
309 | ||
4366e598 YW |
310 | if (sd_device_get_property_value(dev, "ID_MODEL_FROM_DATABASE", &model) >= 0 || |
311 | sd_device_get_property_value(dev, "ID_MODEL", &model) >= 0) { | |
965e5c5d LP |
312 | |
313 | /* Try to concatenate the device model string with a label, if there is one */ | |
4366e598 YW |
314 | if (sd_device_get_property_value(dev, "ID_FS_LABEL", &label) >= 0 || |
315 | sd_device_get_property_value(dev, "ID_PART_ENTRY_NAME", &label) >= 0 || | |
316 | sd_device_get_property_value(dev, "ID_PART_ENTRY_NUMBER", &label) >= 0) { | |
965e5c5d | 317 | |
965e5c5d LP |
318 | _cleanup_free_ char *j; |
319 | ||
605405c6 | 320 | j = strjoin(model, " ", label); |
ea8ec43b LP |
321 | if (!j) |
322 | return log_oom(); | |
323 | ||
324 | r = unit_set_description(u, j); | |
628c89cc LP |
325 | } else |
326 | r = unit_set_description(u, model); | |
327 | } else | |
328 | r = unit_set_description(u, path); | |
628c89cc | 329 | if (r < 0) |
ea8ec43b | 330 | return log_unit_error_errno(u, r, "Failed to set device description: %m"); |
965e5c5d | 331 | |
ea8ec43b | 332 | return 0; |
965e5c5d LP |
333 | } |
334 | ||
4366e598 | 335 | static int device_add_udev_wants(Unit *u, sd_device *dev) { |
88116909 | 336 | _cleanup_strv_free_ char **added = NULL; |
de040543 | 337 | const char *wants, *property; |
88116909 | 338 | Device *d = DEVICE(u); |
965e5c5d LP |
339 | int r; |
340 | ||
88116909 | 341 | assert(d); |
965e5c5d LP |
342 | assert(dev); |
343 | ||
463d0d15 | 344 | property = MANAGER_IS_USER(u->manager) ? "SYSTEMD_USER_WANTS" : "SYSTEMD_WANTS"; |
de040543 | 345 | |
4366e598 YW |
346 | r = sd_device_get_property_value(dev, property, &wants); |
347 | if (r < 0) | |
de040543 LP |
348 | return 0; |
349 | ||
350 | for (;;) { | |
ceed8f0c | 351 | _cleanup_free_ char *word = NULL, *k = NULL; |
965e5c5d | 352 | |
de040543 | 353 | r = extract_first_word(&wants, &word, NULL, EXTRACT_QUOTES); |
ceed8f0c | 354 | if (r == 0) |
88116909 | 355 | break; |
ceed8f0c ZJS |
356 | if (r == -ENOMEM) |
357 | return log_oom(); | |
358 | if (r < 0) | |
dcebc9ba | 359 | return log_unit_error_errno(u, r, "Failed to parse property %s with value %s: %m", property, wants); |
965e5c5d | 360 | |
88116909 | 361 | if (unit_name_is_valid(word, UNIT_NAME_TEMPLATE) && d->sysfs) { |
dcebc9ba LP |
362 | _cleanup_free_ char *escaped = NULL; |
363 | ||
364 | /* If the unit name is specified as template, then automatically fill in the sysfs path of the | |
365 | * device as instance name, properly escaped. */ | |
366 | ||
88116909 | 367 | r = unit_name_path_escape(d->sysfs, &escaped); |
dcebc9ba | 368 | if (r < 0) |
88116909 | 369 | return log_unit_error_errno(u, r, "Failed to escape %s: %m", d->sysfs); |
dcebc9ba LP |
370 | |
371 | r = unit_name_replace_instance(word, escaped, &k); | |
372 | if (r < 0) | |
373 | return log_unit_error_errno(u, r, "Failed to build %s instance of template %s: %m", escaped, word); | |
374 | } else { | |
375 | /* If this is not a template, then let's mangle it so, that it becomes a valid unit name. */ | |
376 | ||
37cbc1d5 | 377 | r = unit_name_mangle(word, UNIT_NAME_MANGLE_WARN, &k); |
dcebc9ba LP |
378 | if (r < 0) |
379 | return log_unit_error_errno(u, r, "Failed to mangle unit name \"%s\": %m", word); | |
380 | } | |
965e5c5d | 381 | |
35d8c19a | 382 | r = unit_add_dependency_by_name(u, UNIT_WANTS, k, true, UNIT_DEPENDENCY_UDEV); |
965e5c5d | 383 | if (r < 0) |
de040543 | 384 | return log_unit_error_errno(u, r, "Failed to add Wants= dependency: %m"); |
88116909 LP |
385 | |
386 | r = strv_push(&added, k); | |
387 | if (r < 0) | |
388 | return log_oom(); | |
389 | ||
390 | k = NULL; | |
965e5c5d | 391 | } |
88116909 LP |
392 | |
393 | if (d->state != DEVICE_DEAD) { | |
394 | char **i; | |
395 | ||
396 | /* So here's a special hack, to compensate for the fact that the udev database's reload cycles are not | |
397 | * synchronized with our own reload cycles: when we detect that the SYSTEMD_WANTS property of a device | |
398 | * changes while the device unit is already up, let's manually trigger any new units listed in it not | |
399 | * seen before. This typically appens during the boot-time switch root transition, as udev devices | |
400 | * will generally already be up in the initrd, but SYSTEMD_WANTS properties get then added through udev | |
401 | * rules only available on the host system, and thus only when the initial udev coldplug trigger runs. | |
402 | * | |
403 | * We do this only if the device has been up already when we parse this, as otherwise the usual | |
404 | * dependency logic that is run from the dead → plugged transition will trigger these deps. */ | |
405 | ||
406 | STRV_FOREACH(i, added) { | |
407 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
408 | ||
409 | if (strv_contains(d->wants_property, *i)) /* Was this unit already listed before? */ | |
410 | continue; | |
411 | ||
412 | r = manager_add_job_by_name(u->manager, JOB_START, *i, JOB_FAIL, &error, NULL); | |
413 | if (r < 0) | |
414 | log_unit_warning_errno(u, r, "Failed to enqueue SYSTEMD_WANTS= job, ignoring: %s", bus_error_message(&error, r)); | |
415 | } | |
416 | } | |
417 | ||
418 | strv_free(d->wants_property); | |
419 | d->wants_property = TAKE_PTR(added); | |
420 | ||
421 | return 0; | |
965e5c5d LP |
422 | } |
423 | ||
4366e598 | 424 | static bool device_is_bound_by_mounts(Device *d, sd_device *dev) { |
ebc8968b | 425 | const char *bound_by; |
40b1a32c | 426 | int r; |
ebc8968b FB |
427 | |
428 | assert(d); | |
429 | assert(dev); | |
430 | ||
4366e598 | 431 | if (sd_device_get_property_value(dev, "SYSTEMD_MOUNT_DEVICE_BOUND", &bound_by) >= 0) { |
40b1a32c LP |
432 | r = parse_boolean(bound_by); |
433 | if (r < 0) | |
71f79b56 | 434 | log_device_warning_errno(dev, r, "Failed to parse SYSTEMD_MOUNT_DEVICE_BOUND='%s' udev property, ignoring: %m", bound_by); |
ebc8968b | 435 | |
40b1a32c LP |
436 | d->bind_mounts = r > 0; |
437 | } else | |
438 | d->bind_mounts = false; | |
439 | ||
440 | return d->bind_mounts; | |
ebc8968b FB |
441 | } |
442 | ||
86cdffd1 | 443 | static void device_upgrade_mount_deps(Unit *u) { |
ebc8968b FB |
444 | Unit *other; |
445 | Iterator i; | |
eef85c4a | 446 | void *v; |
ebc8968b FB |
447 | int r; |
448 | ||
eef85c4a LP |
449 | /* Let's upgrade Requires= to BindsTo= on us. (Used when SYSTEMD_MOUNT_DEVICE_BOUND is set) */ |
450 | ||
451 | HASHMAP_FOREACH_KEY(v, other, u->dependencies[UNIT_REQUIRED_BY], i) { | |
ebc8968b FB |
452 | if (other->type != UNIT_MOUNT) |
453 | continue; | |
454 | ||
eef85c4a | 455 | r = unit_add_dependency(other, UNIT_BINDS_TO, u, true, UNIT_DEPENDENCY_UDEV); |
ebc8968b | 456 | if (r < 0) |
86cdffd1 | 457 | log_unit_warning_errno(u, r, "Failed to add BindsTo= dependency between device and mount unit, ignoring: %m"); |
ebc8968b | 458 | } |
ebc8968b FB |
459 | } |
460 | ||
4366e598 | 461 | static int device_setup_unit(Manager *m, sd_device *dev, const char *path, bool main) { |
628c89cc | 462 | _cleanup_free_ char *e = NULL; |
2005219f | 463 | const char *sysfs = NULL; |
25ac040b | 464 | Unit *u = NULL; |
25ac040b | 465 | bool delete; |
965e5c5d | 466 | int r; |
25ac040b LP |
467 | |
468 | assert(m); | |
965e5c5d | 469 | assert(path); |
25ac040b | 470 | |
2005219f | 471 | if (dev) { |
4366e598 YW |
472 | r = sd_device_get_syspath(dev, &sysfs); |
473 | if (r < 0) { | |
71f79b56 | 474 | log_device_debug_errno(dev, r, "Couldn't get syspath from device, ignoring: %m"); |
2005219f | 475 | return 0; |
66f3fdbb | 476 | } |
2005219f | 477 | } |
7f275a9f | 478 | |
7410616c LP |
479 | r = unit_name_from_path(path, ".device", &e); |
480 | if (r < 0) | |
71f79b56 | 481 | return log_device_error_errno(dev, r, "Failed to generate unit name from device path: %m"); |
628c89cc LP |
482 | |
483 | u = manager_get_unit(m, e); | |
38b9b72e | 484 | if (u) { |
66f3fdbb LP |
485 | /* The device unit can still be present even if the device was unplugged: a mount unit can reference it |
486 | * hence preventing the GC to have garbaged it. That's desired since the device unit may have a | |
487 | * dependency on the mount unit which was added during the loading of the later. When the device is | |
488 | * plugged the sysfs might not be initialized yet, as we serialize the device's state but do not | |
489 | * serialize the sysfs path across reloads/reexecs. Hence, when coming back from a reload/restart we | |
490 | * might have the state valid, but not the sysfs path. Hence, let's filter out conflicting devices, but | |
491 | * let's accept devices in any state with no sysfs path set. */ | |
492 | ||
493 | if (DEVICE(u)->state == DEVICE_PLUGGED && | |
494 | DEVICE(u)->sysfs && | |
495 | sysfs && | |
496 | !path_equal(DEVICE(u)->sysfs, sysfs)) { | |
497 | log_unit_debug(u, "Device %s appeared twice with different sysfs paths %s and %s, ignoring the latter.", | |
498 | e, DEVICE(u)->sysfs, sysfs); | |
499 | return -EEXIST; | |
ac9d396b | 500 | } |
25ac040b | 501 | |
38b9b72e LP |
502 | delete = false; |
503 | ||
504 | /* Let's remove all dependencies generated due to udev properties. We'll readd whatever is configured | |
505 | * now below. */ | |
506 | unit_remove_dependencies(u, UNIT_DEPENDENCY_UDEV); | |
507 | } else { | |
aab14b13 LP |
508 | delete = true; |
509 | ||
a581e45a | 510 | r = unit_new_for_name(m, sizeof(Device), e, &u); |
66f3fdbb | 511 | if (r < 0) { |
71f79b56 | 512 | log_device_error_errno(dev, r, "Failed to allocate device unit %s: %m", e); |
25ac040b | 513 | goto fail; |
66f3fdbb | 514 | } |
25ac040b | 515 | |
ee6cb288 | 516 | unit_add_to_load_queue(u); |
38b9b72e | 517 | } |
ee6cb288 | 518 | |
66f3fdbb | 519 | /* If this was created via some dependency and has not actually been seen yet ->sysfs will not be |
ee6cb288 | 520 | * initialized. Hence initialize it if necessary. */ |
2005219f MP |
521 | if (sysfs) { |
522 | r = device_set_sysfs(DEVICE(u), sysfs); | |
66f3fdbb | 523 | if (r < 0) { |
71f79b56 | 524 | log_unit_error_errno(u, r, "Failed to set sysfs path %s: %m", sysfs); |
2005219f | 525 | goto fail; |
66f3fdbb | 526 | } |
ee6cb288 | 527 | |
2005219f | 528 | (void) device_update_description(u, dev, path); |
aab14b13 | 529 | |
66f3fdbb | 530 | /* The additional systemd udev properties we only interpret for the main object */ |
2005219f MP |
531 | if (main) |
532 | (void) device_add_udev_wants(u, dev); | |
533 | } | |
25ac040b | 534 | |
eef85c4a LP |
535 | /* So the user wants the mount units to be bound to the device but a mount unit might has been seen by systemd |
536 | * before the device appears on its radar. In this case the device unit is partially initialized and includes | |
537 | * the deps on the mount unit but at that time the "bind mounts" flag wasn't not present. Fix this up now. */ | |
40b1a32c | 538 | if (dev && device_is_bound_by_mounts(DEVICE(u), dev)) |
ebc8968b | 539 | device_upgrade_mount_deps(u); |
f94ea366 | 540 | |
38b9b72e | 541 | /* Note that this won't dispatch the load queue, the caller has to do that if needed and appropriate */ |
c1e1601e | 542 | unit_add_to_dbus_queue(u); |
66f3fdbb | 543 | |
25ac040b LP |
544 | return 0; |
545 | ||
546 | fail: | |
c9d5c9c0 | 547 | if (delete) |
25ac040b | 548 | unit_free(u); |
ee5f3479 | 549 | |
25ac040b LP |
550 | return r; |
551 | } | |
552 | ||
4366e598 | 553 | static int device_process_new(Manager *m, sd_device *dev) { |
f1421cc6 | 554 | const char *sysfs, *dn, *alias; |
4366e598 | 555 | dev_t devnum; |
003ac9d0 | 556 | int r; |
8fe914ec LP |
557 | |
558 | assert(m); | |
559 | ||
4366e598 | 560 | if (sd_device_get_syspath(dev, &sysfs) < 0) |
f1421cc6 | 561 | return 0; |
8fe914ec LP |
562 | |
563 | /* Add the main unit named after the sysfs path */ | |
628c89cc | 564 | r = device_setup_unit(m, dev, sysfs, true); |
003ac9d0 HH |
565 | if (r < 0) |
566 | return r; | |
8fe914ec LP |
567 | |
568 | /* Add an additional unit for the device node */ | |
4366e598 | 569 | if (sd_device_get_devname(dev, &dn) >= 0) |
628c89cc | 570 | (void) device_setup_unit(m, dev, dn, false); |
8fe914ec LP |
571 | |
572 | /* Add additional units for all symlinks */ | |
4366e598 | 573 | if (sd_device_get_devnum(dev, &devnum) >= 0) { |
8fe914ec LP |
574 | const char *p; |
575 | ||
4366e598 YW |
576 | FOREACH_DEVICE_DEVLINK(dev, p) { |
577 | struct stat st; | |
8fe914ec | 578 | |
4366e598 YW |
579 | if (PATH_STARTSWITH_SET(p, "/dev/block/", "/dev/char/")) |
580 | continue; | |
8fe914ec | 581 | |
4366e598 YW |
582 | /* Verify that the symlink in the FS actually belongs |
583 | * to this device. This is useful to deal with | |
584 | * conflicting devices, e.g. when two disks want the | |
585 | * same /dev/disk/by-label/xxx link because they have | |
586 | * the same label. We want to make sure that the same | |
587 | * device that won the symlink wins in systemd, so we | |
588 | * check the device node major/minor */ | |
589 | if (stat(p, &st) >= 0 && | |
590 | ((!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) || | |
591 | st.st_rdev != devnum)) | |
5845b46b LP |
592 | continue; |
593 | ||
4366e598 YW |
594 | (void) device_setup_unit(m, dev, p, false); |
595 | } | |
8fe914ec LP |
596 | } |
597 | ||
4366e598 YW |
598 | /* Add additional units for all explicitly configured aliases */ |
599 | if (sd_device_get_property_value(dev, "SYSTEMD_ALIAS", &alias) < 0) | |
600 | return 0; | |
601 | ||
ceed8f0c | 602 | for (;;) { |
8fb242ab | 603 | _cleanup_free_ char *word = NULL; |
8fe914ec | 604 | |
ceed8f0c ZJS |
605 | r = extract_first_word(&alias, &word, NULL, EXTRACT_QUOTES); |
606 | if (r == 0) | |
8bb2c8c9 | 607 | break; |
ceed8f0c ZJS |
608 | if (r == -ENOMEM) |
609 | return log_oom(); | |
610 | if (r < 0) | |
71f79b56 | 611 | return log_device_warning_errno(dev, r, "Failed to add parse SYSTEMD_ALIAS property: %m"); |
f1421cc6 | 612 | |
a7f8be01 | 613 | if (!path_is_absolute(word)) |
71f79b56 | 614 | log_device_warning(dev, "SYSTEMD_ALIAS is not an absolute path, ignoring: %s", word); |
a7f8be01 | 615 | else if (!path_is_normalized(word)) |
71f79b56 | 616 | log_device_warning(dev, "SYSTEMD_ALIAS is not a normalized path, ignoring: %s", word); |
a7f8be01 LP |
617 | else |
618 | (void) device_setup_unit(m, dev, word, false); | |
8fe914ec | 619 | } |
8bb2c8c9 LP |
620 | |
621 | return 0; | |
8fe914ec LP |
622 | } |
623 | ||
66f3fdbb | 624 | static void device_found_changed(Device *d, DeviceFound previous, DeviceFound now) { |
628c89cc LP |
625 | assert(d); |
626 | ||
4b58153d | 627 | /* Didn't exist before, but does now? if so, generate a new invocation ID for it */ |
66f3fdbb | 628 | if (previous == DEVICE_NOT_FOUND && now != DEVICE_NOT_FOUND) |
4b58153d LP |
629 | (void) unit_acquire_invocation_id(UNIT(d)); |
630 | ||
66f3fdbb LP |
631 | if (FLAGS_SET(now, DEVICE_FOUND_UDEV)) |
632 | /* When the device is known to udev we consider it plugged. */ | |
f6200941 | 633 | device_set_state(d, DEVICE_PLUGGED); |
66f3fdbb LP |
634 | else if (now != DEVICE_NOT_FOUND && !FLAGS_SET(previous, DEVICE_FOUND_UDEV)) |
635 | /* If the device has not been seen by udev yet, but is now referenced by the kernel, then we assume the | |
f6200941 LP |
636 | * kernel knows it now, and udev might soon too. */ |
637 | device_set_state(d, DEVICE_TENTATIVE); | |
244f8055 | 638 | else |
66f3fdbb LP |
639 | /* If nobody sees the device, or if the device was previously seen by udev and now is only referenced |
640 | * from the kernel, then we consider the device is gone, the kernel just hasn't noticed it yet. */ | |
f6200941 | 641 | device_set_state(d, DEVICE_DEAD); |
628c89cc LP |
642 | } |
643 | ||
66f3fdbb LP |
644 | static void device_update_found_one(Device *d, DeviceFound found, DeviceFound mask) { |
645 | assert(d); | |
646 | ||
647 | if (MANAGER_IS_RUNNING(UNIT(d)->manager)) { | |
648 | DeviceFound n, previous; | |
649 | ||
650 | /* When we are already running, then apply the new mask right-away, and trigger state changes | |
651 | * right-away */ | |
652 | ||
653 | n = (d->found & ~mask) | (found & mask); | |
654 | if (n == d->found) | |
655 | return; | |
656 | ||
657 | previous = d->found; | |
658 | d->found = n; | |
659 | ||
660 | device_found_changed(d, previous, n); | |
661 | } else | |
662 | /* We aren't running yet, let's apply the new mask to the shadow variable instead, which we'll apply as | |
663 | * soon as we catch-up with the state. */ | |
664 | d->enumerated_found = (d->enumerated_found & ~mask) | (found & mask); | |
665 | } | |
666 | ||
485ae697 | 667 | static void device_update_found_by_sysfs(Manager *m, const char *sysfs, DeviceFound found, DeviceFound mask) { |
cc0df6cc | 668 | Device *d, *l, *n; |
25ac040b LP |
669 | |
670 | assert(m); | |
628c89cc | 671 | assert(sysfs); |
25ac040b | 672 | |
485ae697 LP |
673 | if (mask == 0) |
674 | return; | |
25ac040b | 675 | |
f1421cc6 | 676 | l = hashmap_get(m->devices_by_sysfs, sysfs); |
cc0df6cc | 677 | LIST_FOREACH_SAFE(same_sysfs, d, n, l) |
485ae697 | 678 | device_update_found_one(d, found, mask); |
25ac040b LP |
679 | } |
680 | ||
485ae697 | 681 | static int device_update_found_by_name(Manager *m, const char *path, DeviceFound found, DeviceFound mask) { |
628c89cc LP |
682 | _cleanup_free_ char *e = NULL; |
683 | Unit *u; | |
7410616c | 684 | int r; |
f94ea366 LP |
685 | |
686 | assert(m); | |
628c89cc | 687 | assert(path); |
f94ea366 | 688 | |
485ae697 | 689 | if (mask == 0) |
628c89cc | 690 | return 0; |
f94ea366 | 691 | |
7410616c LP |
692 | r = unit_name_from_path(path, ".device", &e); |
693 | if (r < 0) | |
694 | return log_error_errno(r, "Failed to generate unit name from device path: %m"); | |
f94ea366 | 695 | |
628c89cc LP |
696 | u = manager_get_unit(m, e); |
697 | if (!u) | |
698 | return 0; | |
699 | ||
485ae697 | 700 | device_update_found_one(DEVICE(u), found, mask); |
f94ea366 LP |
701 | return 0; |
702 | } | |
703 | ||
4366e598 | 704 | static bool device_is_ready(sd_device *dev) { |
f1421cc6 LP |
705 | const char *ready; |
706 | ||
707 | assert(dev); | |
708 | ||
4366e598 | 709 | if (sd_device_get_property_value(dev, "SYSTEMD_READY", &ready) < 0) |
f1421cc6 LP |
710 | return true; |
711 | ||
712 | return parse_boolean(ready) != 0; | |
713 | } | |
714 | ||
a7f241db LP |
715 | static Unit *device_following(Unit *u) { |
716 | Device *d = DEVICE(u); | |
717 | Device *other, *first = NULL; | |
718 | ||
719 | assert(d); | |
720 | ||
ac155bb8 | 721 | if (startswith(u->id, "sys-")) |
a7f241db LP |
722 | return NULL; |
723 | ||
724 | /* Make everybody follow the unit that's named after the sysfs path */ | |
725 | for (other = d->same_sysfs_next; other; other = other->same_sysfs_next) | |
1124fe6f | 726 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
727 | return UNIT(other); |
728 | ||
729 | for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev) { | |
1124fe6f | 730 | if (startswith(UNIT(other)->id, "sys-")) |
a7f241db LP |
731 | return UNIT(other); |
732 | ||
733 | first = other; | |
734 | } | |
735 | ||
736 | return UNIT(first); | |
737 | } | |
738 | ||
f1421cc6 LP |
739 | static int device_following_set(Unit *u, Set **_set) { |
740 | Device *d = DEVICE(u), *other; | |
af4fa99d | 741 | _cleanup_set_free_ Set *set = NULL; |
6210e7fc LP |
742 | int r; |
743 | ||
744 | assert(d); | |
f1421cc6 | 745 | assert(_set); |
6210e7fc | 746 | |
f1421cc6 LP |
747 | if (LIST_JUST_US(same_sysfs, d)) { |
748 | *_set = NULL; | |
6210e7fc LP |
749 | return 0; |
750 | } | |
751 | ||
d5099efc | 752 | set = set_new(NULL); |
f1421cc6 | 753 | if (!set) |
6210e7fc LP |
754 | return -ENOMEM; |
755 | ||
f1421cc6 LP |
756 | LIST_FOREACH_AFTER(same_sysfs, other, d) { |
757 | r = set_put(set, other); | |
758 | if (r < 0) | |
95f14a3e | 759 | return r; |
f1421cc6 | 760 | } |
6210e7fc | 761 | |
f1421cc6 LP |
762 | LIST_FOREACH_BEFORE(same_sysfs, other, d) { |
763 | r = set_put(set, other); | |
764 | if (r < 0) | |
95f14a3e | 765 | return r; |
f1421cc6 | 766 | } |
6210e7fc | 767 | |
95f14a3e | 768 | *_set = TAKE_PTR(set); |
6210e7fc | 769 | return 1; |
6210e7fc LP |
770 | } |
771 | ||
25ac040b LP |
772 | static void device_shutdown(Manager *m) { |
773 | assert(m); | |
774 | ||
d0955f00 | 775 | m->device_monitor = sd_device_monitor_unref(m->device_monitor); |
525d3cc7 | 776 | m->devices_by_sysfs = hashmap_free(m->devices_by_sysfs); |
25ac040b LP |
777 | } |
778 | ||
ba64af90 | 779 | static void device_enumerate(Manager *m) { |
4366e598 YW |
780 | _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; |
781 | sd_device *dev; | |
718db961 | 782 | int r; |
25ac040b LP |
783 | |
784 | assert(m); | |
785 | ||
d0955f00 YW |
786 | if (!m->device_monitor) { |
787 | r = sd_device_monitor_new(&m->device_monitor); | |
788 | if (r < 0) { | |
789 | log_error_errno(r, "Failed to allocate device monitor: %m"); | |
a16e1123 LP |
790 | goto fail; |
791 | } | |
f94ea366 | 792 | |
47ae6e67 LP |
793 | /* This will fail if we are unprivileged, but that |
794 | * should not matter much, as user instances won't run | |
795 | * during boot. */ | |
d0955f00 | 796 | (void) sd_device_monitor_set_receive_buffer_size(m->device_monitor, 128*1024*1024); |
99448c1f | 797 | |
d0955f00 | 798 | r = sd_device_monitor_filter_add_match_tag(m->device_monitor, "systemd"); |
ba64af90 LP |
799 | if (r < 0) { |
800 | log_error_errno(r, "Failed to add udev tag match: %m"); | |
e1ce2c27 | 801 | goto fail; |
ba64af90 | 802 | } |
e1ce2c27 | 803 | |
d0955f00 | 804 | r = sd_device_monitor_attach_event(m->device_monitor, m->event, 0); |
ba64af90 | 805 | if (r < 0) { |
d0955f00 | 806 | log_error_errno(r, "Failed to attach event to device monitor: %m"); |
a16e1123 | 807 | goto fail; |
ba64af90 | 808 | } |
f94ea366 | 809 | |
d0955f00 | 810 | r = sd_device_monitor_start(m->device_monitor, device_dispatch_io, m, "systemd-device-monitor"); |
ba64af90 | 811 | if (r < 0) { |
d0955f00 | 812 | log_error_errno(r, "Failed to start device monitor: %m"); |
718db961 | 813 | goto fail; |
ba64af90 | 814 | } |
a16e1123 | 815 | } |
f94ea366 | 816 | |
4366e598 | 817 | r = sd_device_enumerator_new(&e); |
ba64af90 | 818 | if (r < 0) { |
4366e598 | 819 | log_error_errno(r, "Failed to alloacte device enumerator: %m"); |
e1ce2c27 | 820 | goto fail; |
ba64af90 | 821 | } |
25ac040b | 822 | |
4366e598 | 823 | r = sd_device_enumerator_add_match_tag(e, "systemd"); |
ba64af90 | 824 | if (r < 0) { |
4366e598 | 825 | log_error_errno(r, "Failed to set tag for device enumeration: %m"); |
e1202047 | 826 | goto fail; |
ba64af90 | 827 | } |
e1202047 | 828 | |
8437c059 | 829 | FOREACH_DEVICE(e, dev) { |
628c89cc LP |
830 | const char *sysfs; |
831 | ||
628c89cc LP |
832 | if (!device_is_ready(dev)) |
833 | continue; | |
834 | ||
835 | (void) device_process_new(m, dev); | |
4366e598 YW |
836 | |
837 | if (sd_device_get_syspath(dev, &sysfs) < 0) | |
838 | continue; | |
839 | ||
66f3fdbb | 840 | device_update_found_by_sysfs(m, sysfs, DEVICE_FOUND_UDEV, DEVICE_FOUND_UDEV); |
628c89cc | 841 | } |
25ac040b | 842 | |
ba64af90 | 843 | return; |
25ac040b LP |
844 | |
845 | fail: | |
25ac040b | 846 | device_shutdown(m); |
5cb5a6ff LP |
847 | } |
848 | ||
87934b36 LP |
849 | static void device_propagate_reload_by_sysfs(Manager *m, const char *sysfs) { |
850 | Device *d, *l, *n; | |
851 | int r; | |
852 | ||
853 | assert(m); | |
854 | assert(sysfs); | |
855 | ||
856 | l = hashmap_get(m->devices_by_sysfs, sysfs); | |
857 | LIST_FOREACH_SAFE(same_sysfs, d, n, l) { | |
858 | if (d->state == DEVICE_DEAD) | |
859 | continue; | |
860 | ||
861 | r = manager_propagate_reload(m, UNIT(d), JOB_REPLACE, NULL); | |
862 | if (r < 0) | |
863 | log_warning_errno(r, "Failed to propagate reload, ignoring: %m"); | |
864 | } | |
865 | } | |
866 | ||
d0955f00 | 867 | static int device_dispatch_io(sd_device_monitor *monitor, sd_device *dev, void *userdata) { |
718db961 | 868 | Manager *m = userdata; |
628c89cc | 869 | const char *action, *sysfs; |
718db961 | 870 | int r; |
f94ea366 LP |
871 | |
872 | assert(m); | |
d0955f00 | 873 | assert(dev); |
f94ea366 | 874 | |
4366e598 YW |
875 | r = sd_device_get_syspath(dev, &sysfs); |
876 | if (r < 0) { | |
71f79b56 | 877 | log_device_error_errno(dev, r, "Failed to get device sys path: %m"); |
628c89cc LP |
878 | return 0; |
879 | } | |
880 | ||
4366e598 YW |
881 | r = sd_device_get_property_value(dev, "ACTION", &action); |
882 | if (r < 0) { | |
71f79b56 | 883 | log_device_error_errno(dev, r, "Failed to get udev action string: %m"); |
718db961 | 884 | return 0; |
f94ea366 LP |
885 | } |
886 | ||
87934b36 LP |
887 | if (streq(action, "change")) |
888 | device_propagate_reload_by_sysfs(m, sysfs); | |
f332611a JR |
889 | |
890 | /* A change event can signal that a device is becoming ready, in particular if | |
891 | * the device is using the SYSTEMD_READY logic in udev | |
892 | * so we need to reach the else block of the follwing if, even for change events */ | |
6d445911 | 893 | if (streq(action, "remove")) { |
628c89cc | 894 | r = swap_process_device_remove(m, dev); |
9670d583 | 895 | if (r < 0) |
71f79b56 | 896 | log_device_warning_errno(dev, r, "Failed to process swap device remove event, ignoring: %m"); |
9670d583 | 897 | |
628c89cc LP |
898 | /* If we get notified that a device was removed by |
899 | * udev, then it's completely gone, hence unset all | |
900 | * found bits */ | |
485ae697 | 901 | device_update_found_by_sysfs(m, sysfs, 0, DEVICE_FOUND_UDEV|DEVICE_FOUND_MOUNT|DEVICE_FOUND_SWAP); |
f1421cc6 | 902 | |
628c89cc LP |
903 | } else if (device_is_ready(dev)) { |
904 | ||
905 | (void) device_process_new(m, dev); | |
906 | ||
907 | r = swap_process_device_new(m, dev); | |
9670d583 | 908 | if (r < 0) |
71f79b56 | 909 | log_device_warning_errno(dev, r, "Failed to process swap device new event, ignoring: %m"); |
9670d583 | 910 | |
f1421cc6 LP |
911 | manager_dispatch_load_queue(m); |
912 | ||
628c89cc | 913 | /* The device is found now, set the udev found bit */ |
485ae697 | 914 | device_update_found_by_sysfs(m, sysfs, DEVICE_FOUND_UDEV, DEVICE_FOUND_UDEV); |
628c89cc LP |
915 | |
916 | } else { | |
917 | /* The device is nominally around, but not ready for | |
918 | * us. Hence unset the udev bit, but leave the rest | |
919 | * around. */ | |
920 | ||
485ae697 | 921 | device_update_found_by_sysfs(m, sysfs, 0, DEVICE_FOUND_UDEV); |
f94ea366 LP |
922 | } |
923 | ||
718db961 | 924 | return 0; |
f94ea366 LP |
925 | } |
926 | ||
1c2e9646 | 927 | static bool device_supported(void) { |
0faacd47 | 928 | static int read_only = -1; |
0faacd47 LP |
929 | |
930 | /* If /sys is read-only we don't support device units, and any | |
931 | * attempts to start one should fail immediately. */ | |
932 | ||
933 | if (read_only < 0) | |
934 | read_only = path_is_read_only_fs("/sys"); | |
935 | ||
936 | return read_only <= 0; | |
937 | } | |
938 | ||
4366e598 | 939 | static int validate_node(Manager *m, const char *node, sd_device **ret) { |
628c89cc | 940 | struct stat st; |
e5ca27b7 | 941 | int r; |
628c89cc | 942 | |
34c20ee0 LP |
943 | assert(m); |
944 | assert(node); | |
945 | assert(ret); | |
946 | ||
947 | /* Validates a device node that showed up in /proc/swaps or /proc/self/mountinfo if it makes sense for us to | |
948 | * track. Note that this validator is fine within missing device nodes, but not with badly set up ones! */ | |
949 | ||
950 | if (!path_startswith(node, "/dev")) { | |
951 | *ret = NULL; | |
952 | return 0; /* bad! */ | |
953 | } | |
954 | ||
955 | if (stat(node, &st) < 0) { | |
956 | if (errno != ENOENT) | |
957 | return log_error_errno(errno, "Failed to stat() device node file %s: %m", node); | |
958 | ||
959 | *ret = NULL; | |
960 | return 1; /* good! (though missing) */ | |
961 | ||
962 | } else { | |
4366e598 | 963 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
34c20ee0 | 964 | |
4366e598 | 965 | r = device_new_from_stat_rdev(&dev, &st); |
e5ca27b7 | 966 | if (r == -ENOENT) { |
34c20ee0 LP |
967 | *ret = NULL; |
968 | return 1; /* good! (though missing) */ | |
e5ca27b7 LP |
969 | } else if (r == -ENOTTY) { |
970 | *ret = NULL; | |
971 | return 0; /* bad! (not a device node but some other kind of file system node) */ | |
972 | } else if (r < 0) | |
973 | return log_error_errno(r, "Failed to get udev device from devnum %u:%u: %m", major(st.st_rdev), minor(st.st_rdev)); | |
34c20ee0 LP |
974 | |
975 | *ret = TAKE_PTR(dev); | |
976 | return 1; /* good! */ | |
977 | } | |
978 | } | |
979 | ||
980 | void device_found_node(Manager *m, const char *node, DeviceFound found, DeviceFound mask) { | |
981 | int r; | |
982 | ||
628c89cc LP |
983 | assert(m); |
984 | assert(node); | |
985 | ||
4c6d20de | 986 | if (!device_supported()) |
485ae697 | 987 | return; |
4c6d20de | 988 | |
34c20ee0 LP |
989 | if (mask == 0) |
990 | return; | |
991 | ||
992 | /* This is called whenever we find a device referenced in /proc/swaps or /proc/self/mounts. Such a device might | |
993 | * be mounted/enabled at a time where udev has not finished probing it yet, and we thus haven't learned about | |
66f3fdbb LP |
994 | * it yet. In this case we will set the device unit to "tentative" state. |
995 | * | |
996 | * This takes a pair of DeviceFound flags parameters. The 'mask' parameter is a bit mask that indicates which | |
997 | * bits of 'found' to copy into the per-device DeviceFound flags field. Thus, this function may be used to set | |
998 | * and unset individual bits in a single call, while merging partially with previous state. */ | |
628c89cc | 999 | |
485ae697 | 1000 | if ((found & mask) != 0) { |
4366e598 | 1001 | _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
628c89cc | 1002 | |
34c20ee0 LP |
1003 | /* If the device is known in the kernel and newly appeared, then we'll create a device unit for it, |
1004 | * under the name referenced in /proc/swaps or /proc/self/mountinfo. But first, let's validate if | |
1005 | * everything is alright with the device node. */ | |
628c89cc | 1006 | |
34c20ee0 LP |
1007 | r = validate_node(m, node, &dev); |
1008 | if (r <= 0) | |
1009 | return; /* Don't create a device unit for this if the device node is borked. */ | |
628c89cc LP |
1010 | |
1011 | (void) device_setup_unit(m, dev, node, false); | |
1012 | } | |
1013 | ||
1014 | /* Update the device unit's state, should it exist */ | |
485ae697 | 1015 | (void) device_update_found_by_name(m, node, found, mask); |
628c89cc LP |
1016 | } |
1017 | ||
ebc8968b | 1018 | bool device_shall_be_bound_by(Unit *device, Unit *u) { |
8bb2c8c9 LP |
1019 | assert(device); |
1020 | assert(u); | |
ebc8968b FB |
1021 | |
1022 | if (u->type != UNIT_MOUNT) | |
1023 | return false; | |
1024 | ||
1025 | return DEVICE(device)->bind_mounts; | |
1026 | } | |
1027 | ||
87f0e418 | 1028 | const UnitVTable device_vtable = { |
7d17cfbc | 1029 | .object_size = sizeof(Device), |
f975e971 LP |
1030 | .sections = |
1031 | "Unit\0" | |
1032 | "Device\0" | |
1033 | "Install\0", | |
5cb5a6ff | 1034 | |
c5a97ed1 LP |
1035 | .gc_jobs = true, |
1036 | ||
faf919f1 | 1037 | .init = device_init, |
034c6ed7 | 1038 | .done = device_done, |
718db961 LP |
1039 | .load = unit_load_fragment_and_dropin_optional, |
1040 | ||
f50e0a01 | 1041 | .coldplug = device_coldplug, |
66f3fdbb | 1042 | .catchup = device_catchup, |
f50e0a01 | 1043 | |
f6200941 LP |
1044 | .serialize = device_serialize, |
1045 | .deserialize_item = device_deserialize_item, | |
1046 | ||
5cb5a6ff LP |
1047 | .dump = device_dump, |
1048 | ||
f50e0a01 | 1049 | .active_state = device_active_state, |
10a94420 | 1050 | .sub_state_to_string = device_sub_state_to_string, |
25ac040b | 1051 | |
718db961 | 1052 | .bus_vtable = bus_device_vtable, |
4139c1b2 | 1053 | |
a7f241db | 1054 | .following = device_following, |
6210e7fc | 1055 | .following_set = device_following_set, |
a7f241db | 1056 | |
f50e0a01 | 1057 | .enumerate = device_enumerate, |
c6918296 | 1058 | .shutdown = device_shutdown, |
0faacd47 | 1059 | .supported = device_supported, |
c6918296 MS |
1060 | |
1061 | .status_message_formats = { | |
1062 | .starting_stopping = { | |
1063 | [0] = "Expecting device %s...", | |
1064 | }, | |
1065 | .finished_start_job = { | |
1066 | [JOB_DONE] = "Found device %s.", | |
1067 | [JOB_TIMEOUT] = "Timed out waiting for device %s.", | |
1068 | }, | |
1069 | }, | |
5cb5a6ff | 1070 | }; |