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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
01f78473 LP |
2 | |
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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/inotify.h> | |
23 | #include <sys/epoll.h> | |
24 | #include <sys/ioctl.h> | |
25 | #include <errno.h> | |
26 | #include <unistd.h> | |
27 | ||
28 | #include "unit.h" | |
29 | #include "unit-name.h" | |
30 | #include "path.h" | |
31 | #include "dbus-path.h" | |
a40eb732 | 32 | #include "special.h" |
398ef8ba | 33 | #include "bus-errors.h" |
01f78473 LP |
34 | |
35 | static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = { | |
36 | [PATH_DEAD] = UNIT_INACTIVE, | |
37 | [PATH_WAITING] = UNIT_ACTIVE, | |
38 | [PATH_RUNNING] = UNIT_ACTIVE, | |
fdf20a31 | 39 | [PATH_FAILED] = UNIT_FAILED |
01f78473 LP |
40 | }; |
41 | ||
0e456f97 LP |
42 | static void path_init(Unit *u) { |
43 | Path *p = PATH(u); | |
44 | ||
45 | assert(u); | |
46 | assert(u->meta.load_state == UNIT_STUB); | |
47 | ||
48 | p->directory_mode = 0755; | |
49 | } | |
50 | ||
62347bc2 LP |
51 | static void path_unwatch_one(Path *p, PathSpec *s) { |
52 | ||
53 | if (s->inotify_fd < 0) | |
54 | return; | |
55 | ||
56 | unit_unwatch_fd(UNIT(p), &s->watch); | |
57 | ||
58 | close_nointr_nofail(s->inotify_fd); | |
59 | s->inotify_fd = -1; | |
60 | } | |
61 | ||
01f78473 LP |
62 | static void path_done(Unit *u) { |
63 | Path *p = PATH(u); | |
64 | PathSpec *s; | |
65 | ||
66 | assert(p); | |
67 | ||
68 | while ((s = p->specs)) { | |
62347bc2 | 69 | path_unwatch_one(p, s); |
01f78473 | 70 | LIST_REMOVE(PathSpec, spec, p->specs, s); |
62347bc2 | 71 | free(s->path); |
01f78473 LP |
72 | free(s); |
73 | } | |
74 | } | |
75 | ||
76 | int path_add_one_mount_link(Path *p, Mount *m) { | |
77 | PathSpec *s; | |
78 | int r; | |
79 | ||
80 | assert(p); | |
81 | assert(m); | |
82 | ||
83 | if (p->meta.load_state != UNIT_LOADED || | |
84 | m->meta.load_state != UNIT_LOADED) | |
85 | return 0; | |
86 | ||
87 | LIST_FOREACH(spec, s, p->specs) { | |
88 | ||
89 | if (!path_startswith(s->path, m->where)) | |
90 | continue; | |
91 | ||
2c966c03 | 92 | if ((r = unit_add_two_dependencies(UNIT(p), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0) |
01f78473 LP |
93 | return r; |
94 | } | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | static int path_add_mount_links(Path *p) { | |
100 | Meta *other; | |
101 | int r; | |
102 | ||
103 | assert(p); | |
104 | ||
ab5c3e3f | 105 | LIST_FOREACH(units_by_type, other, p->meta.manager->units_by_type[UNIT_MOUNT]) |
01f78473 LP |
106 | if ((r = path_add_one_mount_link(p, (Mount*) other)) < 0) |
107 | return r; | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static int path_verify(Path *p) { | |
113 | assert(p); | |
114 | ||
4cd1fbcc | 115 | if (p->meta.load_state != UNIT_LOADED) |
01f78473 LP |
116 | return 0; |
117 | ||
118 | if (!p->specs) { | |
119 | log_error("%s lacks path setting. Refusing.", p->meta.id); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
6c155fe3 LP |
126 | static int path_add_default_dependencies(Path *p) { |
127 | int r; | |
128 | ||
129 | assert(p); | |
130 | ||
2a77d31d LP |
131 | if (p->meta.manager->running_as == MANAGER_SYSTEM) { |
132 | if ((r = unit_add_dependency_by_name(UNIT(p), UNIT_BEFORE, SPECIAL_BASIC_TARGET, NULL, true)) < 0) | |
133 | return r; | |
134 | ||
6c155fe3 LP |
135 | if ((r = unit_add_two_dependencies_by_name(UNIT(p), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0) |
136 | return r; | |
2a77d31d | 137 | } |
6c155fe3 | 138 | |
ead8e478 | 139 | return unit_add_two_dependencies_by_name(UNIT(p), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); |
6c155fe3 LP |
140 | } |
141 | ||
01f78473 LP |
142 | static int path_load(Unit *u) { |
143 | Path *p = PATH(u); | |
144 | int r; | |
145 | ||
146 | assert(u); | |
147 | assert(u->meta.load_state == UNIT_STUB); | |
148 | ||
149 | if ((r = unit_load_fragment_and_dropin(u)) < 0) | |
150 | return r; | |
151 | ||
152 | if (u->meta.load_state == UNIT_LOADED) { | |
153 | ||
154 | if (!p->unit) | |
155 | if ((r = unit_load_related_unit(u, ".service", &p->unit))) | |
156 | return r; | |
157 | ||
158 | if ((r = unit_add_dependency(u, UNIT_BEFORE, p->unit, true)) < 0) | |
159 | return r; | |
160 | ||
161 | if ((r = path_add_mount_links(p)) < 0) | |
162 | return r; | |
a40eb732 | 163 | |
a40eb732 | 164 | if (p->meta.default_dependencies) |
6c155fe3 | 165 | if ((r = path_add_default_dependencies(p)) < 0) |
a40eb732 | 166 | return r; |
01f78473 LP |
167 | } |
168 | ||
169 | return path_verify(p); | |
170 | } | |
171 | ||
172 | static void path_dump(Unit *u, FILE *f, const char *prefix) { | |
173 | Path *p = PATH(u); | |
01f78473 LP |
174 | PathSpec *s; |
175 | ||
e364ad06 LP |
176 | assert(p); |
177 | assert(f); | |
01f78473 LP |
178 | |
179 | fprintf(f, | |
180 | "%sPath State: %s\n" | |
0e456f97 LP |
181 | "%sUnit: %s\n" |
182 | "%sMakeDirectory: %s\n" | |
183 | "%sDirectoryMode: %04o\n", | |
01f78473 | 184 | prefix, path_state_to_string(p->state), |
0e456f97 LP |
185 | prefix, p->unit->meta.id, |
186 | prefix, yes_no(p->make_directory), | |
187 | prefix, p->directory_mode); | |
01f78473 LP |
188 | |
189 | LIST_FOREACH(spec, s, p->specs) | |
190 | fprintf(f, | |
191 | "%s%s: %s\n", | |
192 | prefix, | |
193 | path_type_to_string(s->type), | |
194 | s->path); | |
01f78473 LP |
195 | } |
196 | ||
01f78473 LP |
197 | static int path_watch_one(Path *p, PathSpec *s) { |
198 | static const int flags_table[_PATH_TYPE_MAX] = { | |
782195a3 | 199 | [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB, |
01f78473 | 200 | [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO, |
782195a3 | 201 | [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO |
01f78473 LP |
202 | }; |
203 | ||
204 | bool exists = false; | |
67575eef | 205 | char *k, *slash; |
01f78473 LP |
206 | int r; |
207 | ||
208 | assert(p); | |
209 | assert(s); | |
210 | ||
211 | path_unwatch_one(p, s); | |
212 | ||
213 | if (!(k = strdup(s->path))) | |
214 | return -ENOMEM; | |
215 | ||
216 | if ((s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC)) < 0) { | |
217 | r = -errno; | |
218 | goto fail; | |
219 | } | |
220 | ||
221 | if (unit_watch_fd(UNIT(p), s->inotify_fd, EPOLLIN, &s->watch) < 0) { | |
222 | r = -errno; | |
223 | goto fail; | |
224 | } | |
225 | ||
226 | if ((s->primary_wd = inotify_add_watch(s->inotify_fd, k, flags_table[s->type])) >= 0) | |
227 | exists = true; | |
228 | ||
67575eef | 229 | do { |
01f78473 | 230 | int flags; |
01f78473 LP |
231 | |
232 | /* This assumes the path was passed through path_kill_slashes()! */ | |
233 | if (!(slash = strrchr(k, '/'))) | |
234 | break; | |
235 | ||
67575eef MS |
236 | /* Trim the path at the last slash. Keep the slash if it's the root dir. */ |
237 | slash[slash == k] = 0; | |
01f78473 | 238 | |
3fc546f9 | 239 | flags = IN_MOVE_SELF; |
01f78473 | 240 | if (!exists) |
3fc546f9 | 241 | flags |= IN_DELETE_SELF | IN_ATTRIB | IN_CREATE | IN_MOVED_TO; |
01f78473 LP |
242 | |
243 | if (inotify_add_watch(s->inotify_fd, k, flags) >= 0) | |
244 | exists = true; | |
67575eef | 245 | } while (slash != k); |
01f78473 LP |
246 | |
247 | return 0; | |
248 | ||
249 | fail: | |
250 | free(k); | |
251 | ||
252 | path_unwatch_one(p, s); | |
253 | return r; | |
254 | } | |
255 | ||
256 | static void path_unwatch(Path *p) { | |
257 | PathSpec *s; | |
258 | ||
259 | assert(p); | |
260 | ||
261 | LIST_FOREACH(spec, s, p->specs) | |
262 | path_unwatch_one(p, s); | |
263 | } | |
264 | ||
265 | static int path_watch(Path *p) { | |
266 | int r; | |
267 | PathSpec *s; | |
268 | ||
269 | assert(p); | |
270 | ||
271 | LIST_FOREACH(spec, s, p->specs) | |
272 | if ((r = path_watch_one(p, s)) < 0) | |
273 | return r; | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static void path_set_state(Path *p, PathState state) { | |
279 | PathState old_state; | |
280 | assert(p); | |
281 | ||
282 | old_state = p->state; | |
283 | p->state = state; | |
284 | ||
672028dc LP |
285 | if (state != PATH_WAITING && |
286 | (state != PATH_RUNNING || p->inotify_triggered)) | |
01f78473 LP |
287 | path_unwatch(p); |
288 | ||
289 | if (state != old_state) | |
290 | log_debug("%s changed %s -> %s", | |
291 | p->meta.id, | |
292 | path_state_to_string(old_state), | |
293 | path_state_to_string(state)); | |
294 | ||
e2f3b44c | 295 | unit_notify(UNIT(p), state_translation_table[old_state], state_translation_table[state], true); |
01f78473 LP |
296 | } |
297 | ||
ac3f50ca | 298 | static void path_enter_waiting(Path *p, bool initial, bool recheck); |
01f78473 LP |
299 | |
300 | static int path_coldplug(Unit *u) { | |
301 | Path *p = PATH(u); | |
302 | ||
303 | assert(p); | |
304 | assert(p->state == PATH_DEAD); | |
305 | ||
306 | if (p->deserialized_state != p->state) { | |
307 | ||
308 | if (p->deserialized_state == PATH_WAITING || | |
309 | p->deserialized_state == PATH_RUNNING) | |
ac3f50ca | 310 | path_enter_waiting(p, true, true); |
01f78473 LP |
311 | else |
312 | path_set_state(p, p->deserialized_state); | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static void path_enter_dead(Path *p, bool success) { | |
319 | assert(p); | |
320 | ||
321 | if (!success) | |
322 | p->failure = true; | |
323 | ||
fdf20a31 | 324 | path_set_state(p, p->failure ? PATH_FAILED : PATH_DEAD); |
01f78473 LP |
325 | } |
326 | ||
327 | static void path_enter_running(Path *p) { | |
328 | int r; | |
398ef8ba LP |
329 | DBusError error; |
330 | ||
01f78473 | 331 | assert(p); |
398ef8ba | 332 | dbus_error_init(&error); |
01f78473 | 333 | |
ba3e67a7 LP |
334 | /* Don't start job if we are supposed to go down */ |
335 | if (p->meta.job && p->meta.job->type == JOB_STOP) | |
336 | return; | |
337 | ||
398ef8ba | 338 | if ((r = manager_add_job(p->meta.manager, JOB_START, p->unit, JOB_REPLACE, true, &error, NULL)) < 0) |
01f78473 LP |
339 | goto fail; |
340 | ||
672028dc LP |
341 | p->inotify_triggered = false; |
342 | ||
343 | if ((r = path_watch(p)) < 0) | |
344 | goto fail; | |
345 | ||
01f78473 LP |
346 | path_set_state(p, PATH_RUNNING); |
347 | return; | |
348 | ||
349 | fail: | |
398ef8ba | 350 | log_warning("%s failed to queue unit startup job: %s", p->meta.id, bus_error(&error, r)); |
01f78473 | 351 | path_enter_dead(p, false); |
398ef8ba LP |
352 | |
353 | dbus_error_free(&error); | |
01f78473 LP |
354 | } |
355 | ||
ac3f50ca | 356 | static bool path_check_good(Path *p, bool initial) { |
01f78473 | 357 | PathSpec *s; |
01f78473 LP |
358 | bool good = false; |
359 | ||
ac3f50ca | 360 | assert(p); |
672028dc | 361 | |
01f78473 LP |
362 | LIST_FOREACH(spec, s, p->specs) { |
363 | ||
364 | switch (s->type) { | |
365 | ||
366 | case PATH_EXISTS: | |
367 | good = access(s->path, F_OK) >= 0; | |
368 | break; | |
369 | ||
36af55d9 LP |
370 | case PATH_DIRECTORY_NOT_EMPTY: { |
371 | int k; | |
372 | ||
373 | k = dir_is_empty(s->path); | |
374 | good = !(k == -ENOENT || k > 0); | |
01f78473 | 375 | break; |
36af55d9 | 376 | } |
01f78473 LP |
377 | |
378 | case PATH_CHANGED: { | |
379 | bool b; | |
380 | ||
381 | b = access(s->path, F_OK) >= 0; | |
382 | good = !initial && b != s->previous_exists; | |
383 | s->previous_exists = b; | |
384 | break; | |
385 | } | |
386 | ||
387 | default: | |
388 | ; | |
389 | } | |
390 | ||
391 | if (good) | |
392 | break; | |
393 | } | |
394 | ||
ac3f50ca LP |
395 | return good; |
396 | } | |
01f78473 | 397 | |
ac3f50ca LP |
398 | static void path_enter_waiting(Path *p, bool initial, bool recheck) { |
399 | int r; | |
0595f9a1 | 400 | |
ac3f50ca LP |
401 | if (recheck) |
402 | if (path_check_good(p, initial)) { | |
403 | log_debug("%s got triggered.", p->meta.id); | |
404 | path_enter_running(p); | |
405 | return; | |
406 | } | |
407 | ||
408 | if ((r = path_watch(p)) < 0) | |
409 | goto fail; | |
410 | ||
411 | /* Hmm, so now we have created inotify watches, but the file | |
412 | * might have appeared/been removed by now, so we must | |
413 | * recheck */ | |
414 | ||
415 | if (recheck) | |
416 | if (path_check_good(p, false)) { | |
417 | log_debug("%s got triggered.", p->meta.id); | |
418 | path_enter_running(p); | |
419 | return; | |
420 | } | |
01f78473 LP |
421 | |
422 | path_set_state(p, PATH_WAITING); | |
423 | return; | |
424 | ||
425 | fail: | |
426 | log_warning("%s failed to enter waiting state: %s", p->meta.id, strerror(-r)); | |
427 | path_enter_dead(p, false); | |
428 | } | |
429 | ||
0e456f97 LP |
430 | static void path_mkdir(Path *p) { |
431 | PathSpec *s; | |
432 | ||
433 | assert(p); | |
434 | ||
435 | if (!p->make_directory) | |
436 | return; | |
437 | ||
438 | LIST_FOREACH(spec, s, p->specs) { | |
439 | int r; | |
440 | ||
441 | if (s->type == PATH_EXISTS) | |
442 | continue; | |
443 | ||
444 | if ((r = mkdir_p(s->path, p->directory_mode)) < 0) | |
445 | log_warning("mkdir(%s) failed: %s", s->path, strerror(-r)); | |
446 | } | |
447 | } | |
448 | ||
01f78473 LP |
449 | static int path_start(Unit *u) { |
450 | Path *p = PATH(u); | |
451 | ||
452 | assert(p); | |
fdf20a31 | 453 | assert(p->state == PATH_DEAD || p->state == PATH_FAILED); |
01f78473 LP |
454 | |
455 | if (p->unit->meta.load_state != UNIT_LOADED) | |
456 | return -ENOENT; | |
457 | ||
0e456f97 LP |
458 | path_mkdir(p); |
459 | ||
01f78473 | 460 | p->failure = false; |
ac3f50ca | 461 | path_enter_waiting(p, true, true); |
00dc5d76 | 462 | |
01f78473 LP |
463 | return 0; |
464 | } | |
465 | ||
466 | static int path_stop(Unit *u) { | |
467 | Path *p = PATH(u); | |
468 | ||
469 | assert(p); | |
470 | assert(p->state == PATH_WAITING || p->state == PATH_RUNNING); | |
471 | ||
472 | path_enter_dead(p, true); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static int path_serialize(Unit *u, FILE *f, FDSet *fds) { | |
477 | Path *p = PATH(u); | |
478 | ||
479 | assert(u); | |
480 | assert(f); | |
481 | assert(fds); | |
482 | ||
483 | unit_serialize_item(u, f, "state", path_state_to_string(p->state)); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | static int path_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
489 | Path *p = PATH(u); | |
490 | ||
491 | assert(u); | |
492 | assert(key); | |
493 | assert(value); | |
494 | assert(fds); | |
495 | ||
496 | if (streq(key, "state")) { | |
497 | PathState state; | |
498 | ||
499 | if ((state = path_state_from_string(value)) < 0) | |
500 | log_debug("Failed to parse state value %s", value); | |
501 | else | |
502 | p->deserialized_state = state; | |
503 | } else | |
504 | log_debug("Unknown serialization key '%s'", key); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static UnitActiveState path_active_state(Unit *u) { | |
510 | assert(u); | |
511 | ||
512 | return state_translation_table[PATH(u)->state]; | |
513 | } | |
514 | ||
515 | static const char *path_sub_state_to_string(Unit *u) { | |
516 | assert(u); | |
517 | ||
518 | return path_state_to_string(PATH(u)->state); | |
519 | } | |
520 | ||
521 | static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) { | |
522 | Path *p = PATH(u); | |
523 | int l; | |
524 | ssize_t k; | |
f601daa7 LP |
525 | uint8_t *buf = NULL; |
526 | struct inotify_event *e; | |
01f78473 | 527 | PathSpec *s; |
672028dc | 528 | bool changed; |
01f78473 LP |
529 | |
530 | assert(p); | |
531 | assert(fd >= 0); | |
532 | ||
672028dc LP |
533 | if (p->state != PATH_WAITING && |
534 | p->state != PATH_RUNNING) | |
01f78473 LP |
535 | return; |
536 | ||
4313fc2c | 537 | /* log_debug("inotify wakeup on %s.", u->meta.id); */ |
01f78473 LP |
538 | |
539 | if (events != EPOLLIN) { | |
540 | log_error("Got Invalid poll event on inotify."); | |
541 | goto fail; | |
542 | } | |
543 | ||
544 | LIST_FOREACH(spec, s, p->specs) | |
545 | if (s->inotify_fd == fd) | |
546 | break; | |
547 | ||
548 | if (!s) { | |
549 | log_error("Got event on unknown fd."); | |
550 | goto fail; | |
551 | } | |
552 | ||
553 | if (ioctl(fd, FIONREAD, &l) < 0) { | |
554 | log_error("FIONREAD failed: %s", strerror(errno)); | |
555 | goto fail; | |
556 | } | |
557 | ||
ac3f50ca LP |
558 | assert(l > 0); |
559 | ||
01f78473 LP |
560 | if (!(buf = malloc(l))) { |
561 | log_error("Failed to allocate buffer: %s", strerror(-ENOMEM)); | |
562 | goto fail; | |
563 | } | |
564 | ||
565 | if ((k = read(fd, buf, l)) < 0) { | |
566 | log_error("Failed to read inotify event: %s", strerror(-errno)); | |
567 | goto fail; | |
568 | } | |
569 | ||
672028dc LP |
570 | /* If we are already running, then remember that one event was |
571 | * dispatched so that we restart the service only if something | |
572 | * actually changed on disk */ | |
573 | p->inotify_triggered = true; | |
574 | ||
f601daa7 | 575 | e = (struct inotify_event*) buf; |
01f78473 | 576 | |
672028dc | 577 | changed = false; |
f601daa7 LP |
578 | while (k > 0) { |
579 | size_t step; | |
580 | ||
581 | if (s->type == PATH_CHANGED && s->primary_wd == e->wd) | |
672028dc | 582 | changed = true; |
f601daa7 LP |
583 | |
584 | step = sizeof(struct inotify_event) + e->len; | |
585 | assert(step <= (size_t) k); | |
586 | ||
587 | e = (struct inotify_event*) ((uint8_t*) e + step); | |
588 | k -= step; | |
589 | } | |
01f78473 | 590 | |
672028dc LP |
591 | if (changed) |
592 | path_enter_running(p); | |
593 | else | |
ac3f50ca | 594 | path_enter_waiting(p, false, true); |
672028dc | 595 | |
01f78473 LP |
596 | free(buf); |
597 | ||
598 | return; | |
599 | ||
600 | fail: | |
601 | free(buf); | |
602 | path_enter_dead(p, false); | |
603 | } | |
604 | ||
605 | void path_unit_notify(Unit *u, UnitActiveState new_state) { | |
606 | char *n; | |
607 | int r; | |
608 | Iterator i; | |
609 | ||
610 | if (u->meta.type == UNIT_PATH) | |
611 | return; | |
612 | ||
613 | SET_FOREACH(n, u->meta.names, i) { | |
614 | char *k; | |
615 | Unit *t; | |
616 | Path *p; | |
617 | ||
618 | if (!(k = unit_name_change_suffix(n, ".path"))) { | |
619 | r = -ENOMEM; | |
620 | goto fail; | |
621 | } | |
622 | ||
623 | t = manager_get_unit(u->meta.manager, k); | |
624 | free(k); | |
625 | ||
626 | if (!t) | |
627 | continue; | |
628 | ||
629 | if (t->meta.load_state != UNIT_LOADED) | |
630 | continue; | |
631 | ||
632 | p = PATH(t); | |
633 | ||
634 | if (p->unit != u) | |
635 | continue; | |
636 | ||
637 | if (p->state == PATH_RUNNING && new_state == UNIT_INACTIVE) { | |
638 | log_debug("%s got notified about unit deactivation.", p->meta.id); | |
672028dc LP |
639 | |
640 | /* Hmm, so inotify was triggered since the | |
641 | * last activation, so I guess we need to | |
642 | * recheck what is going on. */ | |
ac3f50ca | 643 | path_enter_waiting(p, false, p->inotify_triggered); |
01f78473 LP |
644 | } |
645 | } | |
646 | ||
647 | return; | |
648 | ||
649 | fail: | |
650 | log_error("Failed find path unit: %s", strerror(-r)); | |
651 | } | |
652 | ||
fdf20a31 | 653 | static void path_reset_failed(Unit *u) { |
5632e374 LP |
654 | Path *p = PATH(u); |
655 | ||
656 | assert(p); | |
657 | ||
fdf20a31 | 658 | if (p->state == PATH_FAILED) |
5632e374 LP |
659 | path_set_state(p, PATH_DEAD); |
660 | ||
661 | p->failure = false; | |
662 | } | |
663 | ||
01f78473 LP |
664 | static const char* const path_state_table[_PATH_STATE_MAX] = { |
665 | [PATH_DEAD] = "dead", | |
666 | [PATH_WAITING] = "waiting", | |
667 | [PATH_RUNNING] = "running", | |
fdf20a31 | 668 | [PATH_FAILED] = "failed" |
01f78473 LP |
669 | }; |
670 | ||
671 | DEFINE_STRING_TABLE_LOOKUP(path_state, PathState); | |
672 | ||
673 | static const char* const path_type_table[_PATH_TYPE_MAX] = { | |
674 | [PATH_EXISTS] = "PathExists", | |
675 | [PATH_CHANGED] = "PathChanged", | |
676 | [PATH_DIRECTORY_NOT_EMPTY] = "DirectoryNotEmpty" | |
677 | }; | |
678 | ||
679 | DEFINE_STRING_TABLE_LOOKUP(path_type, PathType); | |
680 | ||
681 | const UnitVTable path_vtable = { | |
682 | .suffix = ".path", | |
683 | ||
0e456f97 | 684 | .init = path_init, |
01f78473 LP |
685 | .done = path_done, |
686 | .load = path_load, | |
687 | ||
688 | .coldplug = path_coldplug, | |
689 | ||
690 | .dump = path_dump, | |
691 | ||
692 | .start = path_start, | |
693 | .stop = path_stop, | |
694 | ||
695 | .serialize = path_serialize, | |
696 | .deserialize_item = path_deserialize_item, | |
697 | ||
698 | .active_state = path_active_state, | |
699 | .sub_state_to_string = path_sub_state_to_string, | |
700 | ||
701 | .fd_event = path_fd_event, | |
702 | ||
fdf20a31 | 703 | .reset_failed = path_reset_failed, |
5632e374 | 704 | |
c4e2ceae | 705 | .bus_interface = "org.freedesktop.systemd1.Path", |
01f78473 LP |
706 | .bus_message_handler = bus_path_message_handler |
707 | }; |