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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
01f78473 | 2 | |
01f78473 | 3 | #include <errno.h> |
07630cea LP |
4 | #include <sys/epoll.h> |
5 | #include <sys/inotify.h> | |
01f78473 LP |
6 | #include <unistd.h> |
7 | ||
07630cea LP |
8 | #include "bus-error.h" |
9 | #include "bus-util.h" | |
01f78473 | 10 | #include "dbus-path.h" |
6fcbec6f | 11 | #include "dbus-unit.h" |
7a16cd4b | 12 | #include "escape.h" |
bc637776 | 13 | #include "event-util.h" |
3ffd4af2 | 14 | #include "fd-util.h" |
7d50b32a | 15 | #include "glob-util.h" |
9e5fd717 | 16 | #include "inotify-util.h" |
f8c16f42 | 17 | #include "macro.h" |
35cd0ba5 | 18 | #include "mkdir-label.h" |
3ffd4af2 | 19 | #include "path.h" |
7a16cd4b | 20 | #include "path-util.h" |
d68c645b | 21 | #include "serialize.h" |
07630cea | 22 | #include "special.h" |
8fcde012 | 23 | #include "stat-util.h" |
8b43440b | 24 | #include "string-table.h" |
07630cea LP |
25 | #include "string-util.h" |
26 | #include "unit-name.h" | |
27 | #include "unit.h" | |
01f78473 LP |
28 | |
29 | static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = { | |
34a4e22e | 30 | [PATH_DEAD] = UNIT_INACTIVE, |
01f78473 LP |
31 | [PATH_WAITING] = UNIT_ACTIVE, |
32 | [PATH_RUNNING] = UNIT_ACTIVE, | |
34a4e22e | 33 | [PATH_FAILED] = UNIT_FAILED, |
01f78473 LP |
34 | }; |
35 | ||
718db961 LP |
36 | static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); |
37 | ||
38 | int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler) { | |
4b562198 | 39 | static const int flags_table[_PATH_TYPE_MAX] = { |
44ff2a5e LP |
40 | [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB, |
41 | [PATH_EXISTS_GLOB] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB, | |
42 | [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO, | |
43 | [PATH_MODIFIED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO|IN_MODIFY, | |
7a16cd4b | 44 | [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO, |
4b562198 MS |
45 | }; |
46 | ||
47 | bool exists = false; | |
bc41f93e | 48 | char *slash, *oldslash = NULL; |
4b562198 | 49 | int r; |
0e456f97 | 50 | |
4b562198 | 51 | assert(s); |
718db961 LP |
52 | assert(s->unit); |
53 | assert(handler); | |
0e456f97 | 54 | |
718db961 | 55 | path_spec_unwatch(s); |
4b562198 | 56 | |
f8c16f42 ZJS |
57 | s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); |
58 | if (s->inotify_fd < 0) { | |
795125cd | 59 | r = log_error_errno(errno, "Failed to allocate inotify fd: %m"); |
4b562198 MS |
60 | goto fail; |
61 | } | |
62 | ||
151b9b96 | 63 | r = sd_event_add_io(s->unit->manager->event, &s->event_source, s->inotify_fd, EPOLLIN, handler, s); |
795125cd LP |
64 | if (r < 0) { |
65 | log_error_errno(r, "Failed to add inotify fd to event loop: %m"); | |
4b562198 | 66 | goto fail; |
795125cd | 67 | } |
4b562198 | 68 | |
7dfbe2e3 TG |
69 | (void) sd_event_source_set_description(s->event_source, "path"); |
70 | ||
858d36c1 | 71 | /* This function assumes the path was passed through path_simplify()! */ |
80127127 | 72 | assert(!strstr(s->path, "//")); |
4b562198 | 73 | |
180d6802 | 74 | for (slash = strchr(s->path, '/'); ; slash = strchr(slash+1, '/')) { |
41cdcb54 LP |
75 | bool incomplete = false; |
76 | int flags, wd = -1; | |
77 | char tmp, *cut; | |
bc41f93e ZJS |
78 | |
79 | if (slash) { | |
180d6802 MS |
80 | cut = slash + (slash == s->path); |
81 | tmp = *cut; | |
82 | *cut = '\0'; | |
83 | ||
bc41f93e | 84 | flags = IN_MOVE_SELF | IN_DELETE_SELF | IN_ATTRIB | IN_CREATE | IN_MOVED_TO; |
41cdcb54 LP |
85 | } else { |
86 | cut = NULL; | |
bc41f93e | 87 | flags = flags_table[s->type]; |
41cdcb54 | 88 | } |
4b562198 | 89 | |
41cdcb54 LP |
90 | /* If this is a symlink watch both the symlink inode and where it points to. If the inode is |
91 | * not a symlink both calls will install the same watch, which is redundant and doesn't | |
92 | * hurt. */ | |
b3a9d980 | 93 | for (int follow_symlink = 0; follow_symlink < 2; follow_symlink++) { |
41cdcb54 LP |
94 | uint32_t f = flags; |
95 | ||
96 | SET_FLAG(f, IN_DONT_FOLLOW, !follow_symlink); | |
97 | ||
98 | wd = inotify_add_watch(s->inotify_fd, s->path, f); | |
99 | if (wd < 0) { | |
100 | if (IN_SET(errno, EACCES, ENOENT)) { | |
101 | incomplete = true; /* This is an expected error, let's accept this | |
102 | * quietly: we have an incomplete watch for | |
103 | * now. */ | |
104 | break; | |
105 | } | |
106 | ||
107 | /* This second call to inotify_add_watch() should fail like the previous one | |
108 | * and is done for logging the error in a comprehensive way. */ | |
109 | wd = inotify_add_watch_and_warn(s->inotify_fd, s->path, f); | |
110 | if (wd < 0) { | |
111 | if (cut) | |
112 | *cut = tmp; | |
113 | ||
114 | r = wd; | |
115 | goto fail; | |
116 | } | |
117 | ||
118 | /* Hmm, we succeeded in adding the watch this time... let's continue. */ | |
180d6802 | 119 | } |
41cdcb54 | 120 | } |
4b562198 | 121 | |
41cdcb54 LP |
122 | if (incomplete) { |
123 | if (cut) | |
124 | *cut = tmp; | |
27c3112d | 125 | |
41cdcb54 | 126 | break; |
27c3112d | 127 | } |
41cdcb54 | 128 | |
27c3112d FB |
129 | exists = true; |
130 | ||
131 | /* Path exists, we don't need to watch parent too closely. */ | |
132 | if (oldslash) { | |
133 | char *cut2 = oldslash + (oldslash == s->path); | |
134 | char tmp2 = *cut2; | |
135 | *cut2 = '\0'; | |
136 | ||
137 | (void) inotify_add_watch(s->inotify_fd, s->path, IN_MOVE_SELF); | |
138 | /* Error is ignored, the worst can happen is we get spurious events. */ | |
139 | ||
140 | *cut2 = tmp2; | |
28a79bd2 | 141 | } |
bc41f93e | 142 | |
180d6802 MS |
143 | if (cut) |
144 | *cut = tmp; | |
145 | ||
146 | if (slash) | |
bc41f93e | 147 | oldslash = slash; |
180d6802 | 148 | else { |
bc41f93e | 149 | /* whole path has been iterated over */ |
41cdcb54 | 150 | s->primary_wd = wd; |
bc41f93e ZJS |
151 | break; |
152 | } | |
153 | } | |
154 | ||
28a79bd2 | 155 | if (!exists) { |
f2341e0a LP |
156 | r = log_error_errno(errno, "Failed to add watch on any of the components of %s: %m", s->path); |
157 | /* either EACCESS or ENOENT */ | |
28a79bd2 ZJS |
158 | goto fail; |
159 | } | |
160 | ||
4b562198 MS |
161 | return 0; |
162 | ||
163 | fail: | |
718db961 | 164 | path_spec_unwatch(s); |
4b562198 | 165 | return r; |
0e456f97 LP |
166 | } |
167 | ||
718db961 LP |
168 | void path_spec_unwatch(PathSpec *s) { |
169 | assert(s); | |
62347bc2 | 170 | |
5dcadb4c | 171 | s->event_source = sd_event_source_disable_unref(s->event_source); |
03e334a1 | 172 | s->inotify_fd = safe_close(s->inotify_fd); |
62347bc2 LP |
173 | } |
174 | ||
718db961 | 175 | int path_spec_fd_event(PathSpec *s, uint32_t revents) { |
0254e944 | 176 | union inotify_event_buffer buffer; |
f7c1ad4f | 177 | ssize_t l; |
d6d00b65 LP |
178 | |
179 | assert(s); | |
4b562198 | 180 | |
baaa35ad ZJS |
181 | if (revents != EPOLLIN) |
182 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
183 | "Got invalid poll event on inotify."); | |
4b562198 | 184 | |
0254e944 | 185 | l = read(s->inotify_fd, &buffer, sizeof(buffer)); |
f7c1ad4f | 186 | if (l < 0) { |
8add30a0 | 187 | if (ERRNO_IS_TRANSIENT(errno)) |
f7c1ad4f | 188 | return 0; |
4b562198 | 189 | |
4a62c710 | 190 | return log_error_errno(errno, "Failed to read inotify event: %m"); |
f7c1ad4f | 191 | } |
4b562198 | 192 | |
d6d00b65 | 193 | if (IN_SET(s->type, PATH_CHANGED, PATH_MODIFIED)) |
00adc340 | 194 | FOREACH_INOTIFY_EVENT_WARN(e, buffer, l) |
d6d00b65 LP |
195 | if (s->primary_wd == e->wd) |
196 | return 1; | |
a163db44 | 197 | |
d6d00b65 | 198 | return 0; |
4b562198 MS |
199 | } |
200 | ||
4c420328 LB |
201 | static bool path_spec_check_good(PathSpec *s, bool initial, bool from_trigger_notify, char **ret_trigger_path) { |
202 | _cleanup_free_ char *trigger = NULL; | |
d7cf8c24 | 203 | bool b, good = false; |
4b562198 | 204 | |
4c420328 LB |
205 | assert(s); |
206 | assert(ret_trigger_path); | |
207 | ||
4b562198 MS |
208 | switch (s->type) { |
209 | ||
210 | case PATH_EXISTS: | |
708961c7 | 211 | good = access(s->path, F_OK) >= 0; |
4b562198 MS |
212 | break; |
213 | ||
214 | case PATH_EXISTS_GLOB: | |
4c420328 | 215 | good = glob_first(s->path, &trigger) > 0; |
4b562198 MS |
216 | break; |
217 | ||
218 | case PATH_DIRECTORY_NOT_EMPTY: { | |
219 | int k; | |
220 | ||
db55bbf2 | 221 | k = dir_is_empty(s->path, /* ignore_hidden_or_backup= */ true); |
5896a9eb | 222 | good = !(IN_SET(k, -ENOENT, -ENOTDIR) || k > 0); |
4b562198 MS |
223 | break; |
224 | } | |
225 | ||
714d943f | 226 | case PATH_CHANGED: |
d7cf8c24 | 227 | case PATH_MODIFIED: |
4b562198 | 228 | b = access(s->path, F_OK) >= 0; |
708961c7 | 229 | good = !initial && !from_trigger_notify && b != s->previous_exists; |
4b562198 MS |
230 | s->previous_exists = b; |
231 | break; | |
4b562198 MS |
232 | |
233 | default: | |
234 | ; | |
235 | } | |
236 | ||
4c420328 LB |
237 | if (good) { |
238 | if (!trigger) { | |
239 | trigger = strdup(s->path); | |
240 | if (!trigger) | |
241 | (void) log_oom_debug(); | |
242 | } | |
243 | *ret_trigger_path = TAKE_PTR(trigger); | |
244 | } | |
245 | ||
4b562198 MS |
246 | return good; |
247 | } | |
248 | ||
57020a3a | 249 | static void path_spec_mkdir(PathSpec *s, mode_t mode) { |
4b562198 MS |
250 | int r; |
251 | ||
e9fa1bf7 MY |
252 | assert(s); |
253 | ||
3742095b | 254 | if (IN_SET(s->type, PATH_EXISTS, PATH_EXISTS_GLOB)) |
4b562198 MS |
255 | return; |
256 | ||
15f55e80 ZJS |
257 | r = mkdir_p_label(s->path, mode); |
258 | if (r < 0) | |
da927ba9 | 259 | log_warning_errno(r, "mkdir(%s) failed: %m", s->path); |
4b562198 MS |
260 | } |
261 | ||
57020a3a | 262 | static void path_spec_dump(PathSpec *s, FILE *f, const char *prefix) { |
23450c89 ZJS |
263 | const char *type; |
264 | ||
e9fa1bf7 MY |
265 | assert(s); |
266 | assert(f); | |
267 | assert(prefix); | |
268 | ||
23450c89 ZJS |
269 | assert_se(type = path_type_to_string(s->type)); |
270 | fprintf(f, "%s%s: %s\n", prefix, type, s->path); | |
4b562198 MS |
271 | } |
272 | ||
57020a3a LP |
273 | void path_spec_done(PathSpec *s) { |
274 | assert(s); | |
254d1313 | 275 | assert(s->inotify_fd == -EBADF); |
57020a3a | 276 | |
4b562198 MS |
277 | free(s->path); |
278 | } | |
279 | ||
280 | static void path_init(Unit *u) { | |
e9fa1bf7 | 281 | Path *p = ASSERT_PTR(PATH(u)); |
4b562198 | 282 | |
ac155bb8 | 283 | assert(u->load_state == UNIT_STUB); |
4b562198 MS |
284 | |
285 | p->directory_mode = 0755; | |
aaae822b | 286 | |
fed25720 | 287 | p->trigger_limit = RATELIMIT_OFF; |
4b562198 MS |
288 | } |
289 | ||
74051b9b | 290 | void path_free_specs(Path *p) { |
01f78473 LP |
291 | PathSpec *s; |
292 | ||
293 | assert(p); | |
294 | ||
52e3671b | 295 | while ((s = LIST_POP(spec, p->specs))) { |
718db961 | 296 | path_spec_unwatch(s); |
57020a3a | 297 | path_spec_done(s); |
01f78473 LP |
298 | free(s); |
299 | } | |
300 | } | |
301 | ||
74051b9b | 302 | static void path_done(Unit *u) { |
e9fa1bf7 | 303 | Path *p = ASSERT_PTR(PATH(u)); |
74051b9b | 304 | |
bc637776 | 305 | p->trigger_notify_event_source = sd_event_source_disable_unref(p->trigger_notify_event_source); |
74051b9b LP |
306 | path_free_specs(p); |
307 | } | |
308 | ||
eef85c4a | 309 | static int path_add_mount_dependencies(Path *p) { |
01f78473 LP |
310 | int r; |
311 | ||
312 | assert(p); | |
01f78473 LP |
313 | |
314 | LIST_FOREACH(spec, s, p->specs) { | |
9e615fa3 | 315 | r = unit_add_mounts_for(UNIT(p), s->path, UNIT_DEPENDENCY_FILE, UNIT_MOUNT_REQUIRES); |
e0207c8d | 316 | if (r < 0) |
01f78473 | 317 | return r; |
e0207c8d | 318 | } |
01f78473 LP |
319 | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static int path_verify(Path *p) { | |
324 | assert(p); | |
75193d41 | 325 | assert(UNIT(p)->load_state == UNIT_LOADED); |
01f78473 | 326 | |
d85ff944 YW |
327 | if (!p->specs) |
328 | return log_unit_error_errno(UNIT(p), SYNTHETIC_ERRNO(ENOEXEC), "Path unit lacks path setting. Refusing."); | |
01f78473 LP |
329 | |
330 | return 0; | |
331 | } | |
332 | ||
6c155fe3 LP |
333 | static int path_add_default_dependencies(Path *p) { |
334 | int r; | |
335 | ||
336 | assert(p); | |
337 | ||
4c9ea260 LP |
338 | if (!UNIT(p)->default_dependencies) |
339 | return 0; | |
340 | ||
35d8c19a | 341 | r = unit_add_dependency_by_name(UNIT(p), UNIT_BEFORE, SPECIAL_PATHS_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e3d84721 LP |
342 | if (r < 0) |
343 | return r; | |
2a77d31d | 344 | |
463d0d15 | 345 | if (MANAGER_IS_SYSTEM(UNIT(p)->manager)) { |
3835b9aa | 346 | r = unit_add_two_dependencies_by_name(UNIT(p), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
e0207c8d | 347 | if (r < 0) |
6c155fe3 | 348 | return r; |
2a77d31d | 349 | } |
6c155fe3 | 350 | |
3835b9aa | 351 | return unit_add_two_dependencies_by_name(UNIT(p), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); |
eef85c4a LP |
352 | } |
353 | ||
354 | static int path_add_trigger_dependencies(Path *p) { | |
355 | Unit *x; | |
356 | int r; | |
357 | ||
358 | assert(p); | |
359 | ||
bc32241e | 360 | if (UNIT_TRIGGER(UNIT(p))) |
eef85c4a LP |
361 | return 0; |
362 | ||
363 | r = unit_load_related_unit(UNIT(p), ".service", &x); | |
364 | if (r < 0) | |
365 | return r; | |
366 | ||
367 | return unit_add_two_dependencies(UNIT(p), UNIT_BEFORE, UNIT_TRIGGERS, x, true, UNIT_DEPENDENCY_IMPLICIT); | |
6c155fe3 LP |
368 | } |
369 | ||
75193d41 ZJS |
370 | static int path_add_extras(Path *p) { |
371 | int r; | |
372 | ||
47dba9fb LB |
373 | assert(p); |
374 | ||
413e8650 | 375 | /* To avoid getting pid1 in a busy-loop state (eg: unmet condition on associated service), |
47dba9fb LB |
376 | * set a default trigger limit if the user didn't specify any. */ |
377 | if (p->trigger_limit.interval == USEC_INFINITY) | |
378 | p->trigger_limit.interval = 2 * USEC_PER_SEC; | |
379 | ||
380 | if (p->trigger_limit.burst == UINT_MAX) | |
381 | p->trigger_limit.burst = 200; | |
382 | ||
75193d41 ZJS |
383 | r = path_add_trigger_dependencies(p); |
384 | if (r < 0) | |
385 | return r; | |
386 | ||
387 | r = path_add_mount_dependencies(p); | |
388 | if (r < 0) | |
389 | return r; | |
390 | ||
391 | return path_add_default_dependencies(p); | |
392 | } | |
393 | ||
01f78473 | 394 | static int path_load(Unit *u) { |
e9fa1bf7 | 395 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 LP |
396 | int r; |
397 | ||
ac155bb8 | 398 | assert(u->load_state == UNIT_STUB); |
01f78473 | 399 | |
c3620770 | 400 | r = unit_load_fragment_and_dropin(u, true); |
e0207c8d | 401 | if (r < 0) |
01f78473 LP |
402 | return r; |
403 | ||
75193d41 ZJS |
404 | if (u->load_state != UNIT_LOADED) |
405 | return 0; | |
a40eb732 | 406 | |
75193d41 ZJS |
407 | r = path_add_extras(p); |
408 | if (r < 0) | |
409 | return r; | |
01f78473 LP |
410 | |
411 | return path_verify(p); | |
412 | } | |
413 | ||
414 | static void path_dump(Unit *u, FILE *f, const char *prefix) { | |
e9fa1bf7 | 415 | Path *p = ASSERT_PTR(PATH(u)); |
3ecaa09b | 416 | Unit *trigger; |
01f78473 | 417 | |
e364ad06 | 418 | assert(f); |
e9fa1bf7 | 419 | assert(prefix); |
01f78473 | 420 | |
3ecaa09b LP |
421 | trigger = UNIT_TRIGGER(u); |
422 | ||
01f78473 LP |
423 | fprintf(f, |
424 | "%sPath State: %s\n" | |
cd43ca73 | 425 | "%sResult: %s\n" |
0e456f97 LP |
426 | "%sUnit: %s\n" |
427 | "%sMakeDirectory: %s\n" | |
47dba9fb LB |
428 | "%sDirectoryMode: %04o\n" |
429 | "%sTriggerLimitIntervalSec: %s\n" | |
430 | "%sTriggerLimitBurst: %u\n", | |
01f78473 | 431 | prefix, path_state_to_string(p->state), |
cd43ca73 | 432 | prefix, path_result_to_string(p->result), |
3ecaa09b | 433 | prefix, trigger ? trigger->id : "n/a", |
0e456f97 | 434 | prefix, yes_no(p->make_directory), |
47dba9fb LB |
435 | prefix, p->directory_mode, |
436 | prefix, FORMAT_TIMESPAN(p->trigger_limit.interval, USEC_PER_SEC), | |
437 | prefix, p->trigger_limit.burst); | |
01f78473 LP |
438 | |
439 | LIST_FOREACH(spec, s, p->specs) | |
57020a3a | 440 | path_spec_dump(s, f, prefix); |
01f78473 LP |
441 | } |
442 | ||
443 | static void path_unwatch(Path *p) { | |
01f78473 LP |
444 | assert(p); |
445 | ||
446 | LIST_FOREACH(spec, s, p->specs) | |
718db961 | 447 | path_spec_unwatch(s); |
01f78473 LP |
448 | } |
449 | ||
450 | static int path_watch(Path *p) { | |
451 | int r; | |
01f78473 LP |
452 | |
453 | assert(p); | |
454 | ||
e0207c8d | 455 | LIST_FOREACH(spec, s, p->specs) { |
718db961 | 456 | r = path_spec_watch(s, path_dispatch_io); |
e0207c8d | 457 | if (r < 0) |
01f78473 | 458 | return r; |
e0207c8d | 459 | } |
01f78473 LP |
460 | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static void path_set_state(Path *p, PathState state) { | |
465 | PathState old_state; | |
e9fa1bf7 | 466 | |
01f78473 LP |
467 | assert(p); |
468 | ||
6fcbec6f LP |
469 | if (p->state != state) |
470 | bus_unit_send_pending_change_signal(UNIT(p), false); | |
471 | ||
01f78473 LP |
472 | old_state = p->state; |
473 | p->state = state; | |
474 | ||
708961c7 | 475 | if (!IN_SET(state, PATH_WAITING, PATH_RUNNING)) |
01f78473 LP |
476 | path_unwatch(p); |
477 | ||
478 | if (state != old_state) | |
3541bf1f | 479 | log_unit_debug(UNIT(p), "Changed %s -> %s", path_state_to_string(old_state), path_state_to_string(state)); |
01f78473 | 480 | |
96b09de5 | 481 | unit_notify(UNIT(p), state_translation_table[old_state], state_translation_table[state], /* reload_success = */ true); |
01f78473 LP |
482 | } |
483 | ||
708961c7 | 484 | static void path_enter_waiting(Path *p, bool initial, bool from_trigger_notify); |
01f78473 | 485 | |
be847e82 | 486 | static int path_coldplug(Unit *u) { |
e9fa1bf7 | 487 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 488 | |
01f78473 LP |
489 | assert(p->state == PATH_DEAD); |
490 | ||
491 | if (p->deserialized_state != p->state) { | |
492 | ||
3742095b | 493 | if (IN_SET(p->deserialized_state, PATH_WAITING, PATH_RUNNING)) |
708961c7 | 494 | path_enter_waiting(p, true, false); |
be847e82 | 495 | else |
01f78473 LP |
496 | path_set_state(p, p->deserialized_state); |
497 | } | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
cd43ca73 | 502 | static void path_enter_dead(Path *p, PathResult f) { |
01f78473 LP |
503 | assert(p); |
504 | ||
a0fef983 | 505 | if (p->result == PATH_SUCCESS) |
cd43ca73 | 506 | p->result = f; |
01f78473 | 507 | |
aac99f30 | 508 | unit_log_result(UNIT(p), p->result == PATH_SUCCESS, path_result_to_string(p->result)); |
40f41f34 | 509 | path_set_state(p, p->result != PATH_SUCCESS ? PATH_FAILED : PATH_DEAD); |
01f78473 LP |
510 | } |
511 | ||
4c420328 LB |
512 | static void path_enter_running(Path *p, char *trigger_path) { |
513 | _cleanup_(activation_details_unrefp) ActivationDetails *details = NULL; | |
4afd3348 | 514 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
e903182e | 515 | Unit *trigger; |
4c420328 | 516 | Job *job; |
01f78473 | 517 | int r; |
398ef8ba | 518 | |
01f78473 | 519 | assert(p); |
3ecaa09b | 520 | |
ba3e67a7 | 521 | /* Don't start job if we are supposed to go down */ |
31afa0a4 | 522 | if (unit_stop_pending(UNIT(p))) |
ba3e67a7 LP |
523 | return; |
524 | ||
aaae822b DDM |
525 | if (!ratelimit_below(&p->trigger_limit)) { |
526 | log_unit_warning(UNIT(p), "Trigger limit hit, refusing further activation."); | |
527 | path_enter_dead(p, PATH_FAILURE_TRIGGER_LIMIT_HIT); | |
528 | return; | |
529 | } | |
530 | ||
e903182e LP |
531 | trigger = UNIT_TRIGGER(UNIT(p)); |
532 | if (!trigger) { | |
533 | log_unit_error(UNIT(p), "Unit to trigger vanished."); | |
4d7da557 | 534 | goto fail; |
e903182e LP |
535 | } |
536 | ||
4c420328 LB |
537 | details = activation_details_new(UNIT(p)); |
538 | if (!details) { | |
4d7da557 | 539 | log_oom(); |
4c420328 LB |
540 | goto fail; |
541 | } | |
542 | ||
543 | r = free_and_strdup(&(ACTIVATION_DETAILS_PATH(details))->trigger_path_filename, trigger_path); | |
4d7da557 LP |
544 | if (r < 0) { |
545 | log_oom(); | |
01f78473 | 546 | goto fail; |
4d7da557 | 547 | } |
01f78473 | 548 | |
4c420328 | 549 | r = manager_add_job(UNIT(p)->manager, JOB_START, trigger, JOB_REPLACE, NULL, &error, &job); |
4d7da557 LP |
550 | if (r < 0) { |
551 | log_unit_warning(UNIT(p), "Failed to queue unit startup job: %s", bus_error_message(&error, r)); | |
4c420328 | 552 | goto fail; |
4d7da557 | 553 | } |
4c420328 LB |
554 | |
555 | job_set_activation_details(job, details); | |
556 | ||
01f78473 | 557 | path_set_state(p, PATH_RUNNING); |
8fca6944 MS |
558 | path_unwatch(p); |
559 | ||
01f78473 LP |
560 | return; |
561 | ||
562 | fail: | |
cd43ca73 | 563 | path_enter_dead(p, PATH_FAILURE_RESOURCES); |
01f78473 LP |
564 | } |
565 | ||
4c420328 | 566 | static bool path_check_good(Path *p, bool initial, bool from_trigger_notify, char **ret_trigger_path) { |
ac3f50ca | 567 | assert(p); |
4c420328 | 568 | assert(ret_trigger_path); |
672028dc | 569 | |
93e63b2a | 570 | LIST_FOREACH(spec, s, p->specs) |
4c420328 | 571 | if (path_spec_check_good(s, initial, from_trigger_notify, ret_trigger_path)) |
93e63b2a | 572 | return true; |
01f78473 | 573 | |
93e63b2a | 574 | return false; |
ac3f50ca | 575 | } |
01f78473 | 576 | |
708961c7 | 577 | static void path_enter_waiting(Path *p, bool initial, bool from_trigger_notify) { |
4c420328 | 578 | _cleanup_free_ char *trigger_path = NULL; |
708961c7 | 579 | Unit *trigger; |
ac3f50ca | 580 | int r; |
0595f9a1 | 581 | |
bc637776 YW |
582 | if (p->trigger_notify_event_source) |
583 | (void) event_source_disable(p->trigger_notify_event_source); | |
584 | ||
708961c7 MC |
585 | /* If the triggered unit is already running, so are we */ |
586 | trigger = UNIT_TRIGGER(UNIT(p)); | |
720c6183 | 587 | if (trigger && !UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(trigger))) { |
708961c7 MC |
588 | path_set_state(p, PATH_RUNNING); |
589 | path_unwatch(p); | |
590 | return; | |
591 | } | |
592 | ||
4c420328 | 593 | if (path_check_good(p, initial, from_trigger_notify, &trigger_path)) { |
708961c7 | 594 | log_unit_debug(UNIT(p), "Got triggered."); |
4c420328 | 595 | path_enter_running(p, trigger_path); |
708961c7 MC |
596 | return; |
597 | } | |
ac3f50ca | 598 | |
e0207c8d | 599 | r = path_watch(p); |
4d7da557 LP |
600 | if (r < 0) { |
601 | log_unit_warning_errno(UNIT(p), r, "Failed to enter waiting state: %m"); | |
602 | path_enter_dead(p, PATH_FAILURE_RESOURCES); | |
603 | return; | |
604 | } | |
ac3f50ca LP |
605 | |
606 | /* Hmm, so now we have created inotify watches, but the file | |
607 | * might have appeared/been removed by now, so we must | |
608 | * recheck */ | |
609 | ||
4c420328 | 610 | if (path_check_good(p, false, from_trigger_notify, &trigger_path)) { |
708961c7 | 611 | log_unit_debug(UNIT(p), "Got triggered."); |
4c420328 | 612 | path_enter_running(p, trigger_path); |
708961c7 MC |
613 | return; |
614 | } | |
01f78473 LP |
615 | |
616 | path_set_state(p, PATH_WAITING); | |
01f78473 LP |
617 | } |
618 | ||
0e456f97 | 619 | static void path_mkdir(Path *p) { |
0e456f97 LP |
620 | assert(p); |
621 | ||
622 | if (!p->make_directory) | |
623 | return; | |
624 | ||
4b562198 | 625 | LIST_FOREACH(spec, s, p->specs) |
57020a3a | 626 | path_spec_mkdir(s, p->directory_mode); |
0e456f97 LP |
627 | } |
628 | ||
01f78473 | 629 | static int path_start(Unit *u) { |
e9fa1bf7 | 630 | Path *p = ASSERT_PTR(PATH(u)); |
07299350 | 631 | int r; |
01f78473 | 632 | |
3742095b | 633 | assert(IN_SET(p->state, PATH_DEAD, PATH_FAILED)); |
01f78473 | 634 | |
a4191c9f LP |
635 | r = unit_test_trigger_loaded(u); |
636 | if (r < 0) | |
637 | return r; | |
01f78473 | 638 | |
4b58153d LP |
639 | r = unit_acquire_invocation_id(u); |
640 | if (r < 0) | |
641 | return r; | |
642 | ||
0e456f97 LP |
643 | path_mkdir(p); |
644 | ||
cd43ca73 | 645 | p->result = PATH_SUCCESS; |
708961c7 | 646 | path_enter_waiting(p, true, false); |
00dc5d76 | 647 | |
82a2b6bb | 648 | return 1; |
01f78473 LP |
649 | } |
650 | ||
651 | static int path_stop(Unit *u) { | |
e9fa1bf7 | 652 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 653 | |
3742095b | 654 | assert(IN_SET(p->state, PATH_WAITING, PATH_RUNNING)); |
01f78473 | 655 | |
cd43ca73 | 656 | path_enter_dead(p, PATH_SUCCESS); |
82a2b6bb | 657 | return 1; |
01f78473 LP |
658 | } |
659 | ||
660 | static int path_serialize(Unit *u, FILE *f, FDSet *fds) { | |
e9fa1bf7 | 661 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 662 | |
01f78473 LP |
663 | assert(f); |
664 | assert(fds); | |
665 | ||
d68c645b LP |
666 | (void) serialize_item(f, "state", path_state_to_string(p->state)); |
667 | (void) serialize_item(f, "result", path_result_to_string(p->result)); | |
01f78473 | 668 | |
7a16cd4b | 669 | LIST_FOREACH(spec, s, p->specs) { |
23450c89 | 670 | const char *type; |
7a16cd4b ZJS |
671 | _cleanup_free_ char *escaped = NULL; |
672 | ||
673 | escaped = cescape(s->path); | |
674 | if (!escaped) | |
675 | return log_oom(); | |
676 | ||
23450c89 | 677 | assert_se(type = path_type_to_string(s->type)); |
7a16cd4b | 678 | (void) serialize_item_format(f, "path-spec", "%s %i %s", |
23450c89 | 679 | type, |
7a16cd4b | 680 | s->previous_exists, |
f285f077 | 681 | escaped); |
7a16cd4b ZJS |
682 | } |
683 | ||
51ad723d ZJS |
684 | (void) serialize_ratelimit(f, "trigger-ratelimit", &p->trigger_limit); |
685 | ||
01f78473 LP |
686 | return 0; |
687 | } | |
688 | ||
689 | static int path_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
e9fa1bf7 | 690 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 691 | |
01f78473 LP |
692 | assert(key); |
693 | assert(value); | |
694 | assert(fds); | |
695 | ||
696 | if (streq(key, "state")) { | |
697 | PathState state; | |
698 | ||
e0207c8d ZJS |
699 | state = path_state_from_string(value); |
700 | if (state < 0) | |
f2341e0a | 701 | log_unit_debug(u, "Failed to parse state value: %s", value); |
01f78473 LP |
702 | else |
703 | p->deserialized_state = state; | |
cd43ca73 LP |
704 | |
705 | } else if (streq(key, "result")) { | |
706 | PathResult f; | |
707 | ||
708 | f = path_result_from_string(value); | |
709 | if (f < 0) | |
f2341e0a | 710 | log_unit_debug(u, "Failed to parse result value: %s", value); |
cd43ca73 LP |
711 | else if (f != PATH_SUCCESS) |
712 | p->result = f; | |
713 | ||
7a16cd4b | 714 | } else if (streq(key, "path-spec")) { |
e437538f | 715 | int previous_exists, skip = 0; |
7a16cd4b ZJS |
716 | _cleanup_free_ char *type_str = NULL; |
717 | ||
718 | if (sscanf(value, "%ms %i %n", &type_str, &previous_exists, &skip) < 2) | |
719 | log_unit_debug(u, "Failed to parse path-spec value: %s", value); | |
720 | else { | |
721 | _cleanup_free_ char *unescaped = NULL; | |
e437538f | 722 | ssize_t l; |
7a16cd4b | 723 | PathType type; |
7a16cd4b ZJS |
724 | |
725 | type = path_type_from_string(type_str); | |
726 | if (type < 0) { | |
727 | log_unit_warning(u, "Unknown path type \"%s\", ignoring.", type_str); | |
728 | return 0; | |
729 | } | |
730 | ||
e437538f ZJS |
731 | l = cunescape(value+skip, 0, &unescaped); |
732 | if (l < 0) { | |
733 | log_unit_warning_errno(u, l, "Failed to unescape serialize path: %m"); | |
7a16cd4b ZJS |
734 | return 0; |
735 | } | |
736 | ||
737 | LIST_FOREACH(spec, s, p->specs) | |
738 | if (s->type == type && | |
739 | path_equal(s->path, unescaped)) { | |
740 | ||
741 | s->previous_exists = previous_exists; | |
742 | break; | |
743 | } | |
744 | } | |
745 | ||
51ad723d ZJS |
746 | } else if (streq(key, "trigger-ratelimit")) |
747 | deserialize_ratelimit(&p->trigger_limit, key, value); | |
748 | ||
749 | else | |
f2341e0a | 750 | log_unit_debug(u, "Unknown serialization key: %s", key); |
01f78473 LP |
751 | |
752 | return 0; | |
753 | } | |
754 | ||
d1e8e8b5 | 755 | static UnitActiveState path_active_state(Unit *u) { |
e9fa1bf7 | 756 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 757 | |
e9fa1bf7 | 758 | return state_translation_table[p->state]; |
01f78473 LP |
759 | } |
760 | ||
d1e8e8b5 | 761 | static const char *path_sub_state_to_string(Unit *u) { |
e9fa1bf7 | 762 | Path *p = ASSERT_PTR(PATH(u)); |
01f78473 | 763 | |
e9fa1bf7 | 764 | return path_state_to_string(p->state); |
01f78473 LP |
765 | } |
766 | ||
718db961 | 767 | static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
e9fa1bf7 MY |
768 | PathSpec *s = ASSERT_PTR(userdata), *found = NULL; |
769 | Path *p = ASSERT_PTR(PATH(s->unit)); | |
4b562198 | 770 | int changed; |
01f78473 | 771 | |
01f78473 LP |
772 | assert(fd >= 0); |
773 | ||
ec2ce0c5 | 774 | if (!IN_SET(p->state, PATH_WAITING, PATH_RUNNING)) |
718db961 | 775 | return 0; |
01f78473 | 776 | |
03677889 YW |
777 | LIST_FOREACH(spec, i, p->specs) |
778 | if (path_spec_owns_inotify_fd(i, fd)) { | |
779 | found = i; | |
01f78473 | 780 | break; |
03677889 | 781 | } |
01f78473 | 782 | |
03677889 | 783 | if (!found) { |
01f78473 LP |
784 | log_error("Got event on unknown fd."); |
785 | goto fail; | |
786 | } | |
787 | ||
03677889 | 788 | changed = path_spec_fd_event(found, revents); |
4b562198 | 789 | if (changed < 0) |
01f78473 | 790 | goto fail; |
01f78473 | 791 | |
672028dc | 792 | if (changed) |
4c420328 | 793 | path_enter_running(p, found->path); |
672028dc | 794 | else |
708961c7 | 795 | path_enter_waiting(p, false, false); |
672028dc | 796 | |
718db961 | 797 | return 0; |
01f78473 LP |
798 | |
799 | fail: | |
cd43ca73 | 800 | path_enter_dead(p, PATH_FAILURE_RESOURCES); |
718db961 | 801 | return 0; |
01f78473 LP |
802 | } |
803 | ||
bc637776 YW |
804 | static void path_trigger_notify_impl(Unit *u, Unit *other, bool on_defer); |
805 | ||
806 | static int path_trigger_notify_on_defer(sd_event_source *s, void *userdata) { | |
807 | Path *p = ASSERT_PTR(userdata); | |
808 | Unit *trigger; | |
809 | ||
810 | assert(s); | |
811 | ||
812 | trigger = UNIT_TRIGGER(UNIT(p)); | |
813 | if (!trigger) { | |
814 | log_unit_error(UNIT(p), "Unit to trigger vanished."); | |
815 | path_enter_dead(p, PATH_FAILURE_RESOURCES); | |
816 | return 0; | |
817 | } | |
818 | ||
819 | path_trigger_notify_impl(UNIT(p), trigger, /* on_defer = */ true); | |
820 | return 0; | |
821 | } | |
822 | ||
823 | static void path_trigger_notify_impl(Unit *u, Unit *other, bool on_defer) { | |
e9fa1bf7 | 824 | Path *p = ASSERT_PTR(PATH(u)); |
bc637776 | 825 | int r; |
01f78473 | 826 | |
3ecaa09b | 827 | assert(other); |
01f78473 | 828 | |
0377cd29 | 829 | /* Invoked whenever the unit we trigger changes state or gains or loses a job */ |
01f78473 | 830 | |
0377cd29 LP |
831 | /* Filter out invocations with bogus state */ |
832 | assert(UNIT_IS_LOAD_COMPLETE(other->load_state)); | |
01f78473 | 833 | |
47ab8f73 LP |
834 | /* Don't propagate state changes from the triggered unit if we are already down */ |
835 | if (!IN_SET(p->state, PATH_WAITING, PATH_RUNNING)) | |
836 | return; | |
837 | ||
838 | /* Propagate start limit hit state */ | |
839 | if (other->start_limit_hit) { | |
840 | path_enter_dead(p, PATH_FAILURE_UNIT_START_LIMIT_HIT); | |
841 | return; | |
842 | } | |
843 | ||
844 | /* Don't propagate anything if there's still a job queued */ | |
845 | if (other->job) | |
846 | return; | |
847 | ||
3ecaa09b | 848 | if (p->state == PATH_RUNNING && |
720c6183 | 849 | UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) { |
bc637776 YW |
850 | if (!on_defer) |
851 | log_unit_debug(u, "Got notified about unit deactivation."); | |
708961c7 | 852 | } else if (p->state == PATH_WAITING && |
720c6183 | 853 | !UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) { |
bc637776 YW |
854 | if (!on_defer) |
855 | log_unit_debug(u, "Got notified about unit activation."); | |
856 | } else | |
857 | return; | |
858 | ||
859 | if (on_defer) { | |
860 | path_enter_waiting(p, /* initial = */ false, /* from_trigger_notify = */ true); | |
861 | return; | |
01f78473 | 862 | } |
bc637776 YW |
863 | |
864 | /* Do not call path_enter_waiting() directly from path_trigger_notify(), as this may be called by | |
865 | * job_install() -> job_finish_and_invalidate() -> unit_trigger_notify(), and path_enter_waiting() | |
866 | * may install another job and will trigger assertion in job_install(). | |
867 | * https://github.com/systemd/systemd/issues/24577#issuecomment-1522628906 | |
868 | * Hence, first setup defer event source here, and call path_enter_waiting() slightly later. */ | |
869 | if (p->trigger_notify_event_source) { | |
870 | r = sd_event_source_set_enabled(p->trigger_notify_event_source, SD_EVENT_ONESHOT); | |
871 | if (r < 0) { | |
872 | log_unit_warning_errno(u, r, "Failed to enable event source for triggering notify: %m"); | |
873 | path_enter_dead(p, PATH_FAILURE_RESOURCES); | |
874 | return; | |
875 | } | |
876 | } else { | |
877 | r = sd_event_add_defer(u->manager->event, &p->trigger_notify_event_source, path_trigger_notify_on_defer, p); | |
878 | if (r < 0) { | |
879 | log_unit_warning_errno(u, r, "Failed to allocate event source for triggering notify: %m"); | |
880 | path_enter_dead(p, PATH_FAILURE_RESOURCES); | |
881 | return; | |
882 | } | |
883 | ||
884 | (void) sd_event_source_set_description(p->trigger_notify_event_source, "path-trigger-notify"); | |
885 | } | |
886 | } | |
887 | ||
888 | static void path_trigger_notify(Unit *u, Unit *other) { | |
889 | path_trigger_notify_impl(u, other, /* on_defer = */ false); | |
01f78473 LP |
890 | } |
891 | ||
fdf20a31 | 892 | static void path_reset_failed(Unit *u) { |
e9fa1bf7 | 893 | Path *p = ASSERT_PTR(PATH(u)); |
5632e374 | 894 | |
fdf20a31 | 895 | if (p->state == PATH_FAILED) |
5632e374 LP |
896 | path_set_state(p, PATH_DEAD); |
897 | ||
cd43ca73 | 898 | p->result = PATH_SUCCESS; |
5632e374 LP |
899 | } |
900 | ||
705578c3 | 901 | static int path_can_start(Unit *u) { |
e9fa1bf7 | 902 | Path *p = ASSERT_PTR(PATH(u)); |
9727f242 DDM |
903 | int r; |
904 | ||
9727f242 DDM |
905 | r = unit_test_start_limit(u); |
906 | if (r < 0) { | |
907 | path_enter_dead(p, PATH_FAILURE_START_LIMIT_HIT); | |
908 | return r; | |
909 | } | |
910 | ||
705578c3 | 911 | return 1; |
9727f242 DDM |
912 | } |
913 | ||
4c420328 LB |
914 | static void activation_details_path_done(ActivationDetails *details) { |
915 | ActivationDetailsPath *p = ASSERT_PTR(ACTIVATION_DETAILS_PATH(details)); | |
916 | ||
917 | p->trigger_path_filename = mfree(p->trigger_path_filename); | |
918 | } | |
919 | ||
920 | static void activation_details_path_serialize(ActivationDetails *details, FILE *f) { | |
921 | ActivationDetailsPath *p = ASSERT_PTR(ACTIVATION_DETAILS_PATH(details)); | |
922 | ||
923 | assert(f); | |
924 | ||
925 | if (p->trigger_path_filename) | |
926 | (void) serialize_item(f, "activation-details-path-filename", p->trigger_path_filename); | |
927 | } | |
928 | ||
929 | static int activation_details_path_deserialize(const char *key, const char *value, ActivationDetails **details) { | |
930 | int r; | |
931 | ||
932 | assert(key); | |
933 | assert(value); | |
934 | ||
935 | if (!details || !*details) | |
936 | return -EINVAL; | |
937 | ||
938 | ActivationDetailsPath *p = ACTIVATION_DETAILS_PATH(*details); | |
939 | if (!p) | |
940 | return -EINVAL; | |
941 | ||
942 | if (!streq(key, "activation-details-path-filename")) | |
943 | return -EINVAL; | |
944 | ||
945 | r = free_and_strdup(&p->trigger_path_filename, value); | |
946 | if (r < 0) | |
947 | return r; | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | static int activation_details_path_append_env(ActivationDetails *details, char ***strv) { | |
e9fa1bf7 | 953 | ActivationDetailsPath *p = ASSERT_PTR(ACTIVATION_DETAILS_PATH(details)); |
4c420328 LB |
954 | char *s; |
955 | int r; | |
956 | ||
4c420328 | 957 | assert(strv); |
4c420328 LB |
958 | |
959 | if (isempty(p->trigger_path_filename)) | |
960 | return 0; | |
961 | ||
962 | s = strjoin("TRIGGER_PATH=", p->trigger_path_filename); | |
963 | if (!s) | |
964 | return -ENOMEM; | |
965 | ||
966 | r = strv_consume(strv, TAKE_PTR(s)); | |
967 | if (r < 0) | |
968 | return r; | |
969 | ||
970 | return 1; /* Return the number of variables added to the env block */ | |
971 | } | |
972 | ||
973 | static int activation_details_path_append_pair(ActivationDetails *details, char ***strv) { | |
e9fa1bf7 | 974 | ActivationDetailsPath *p = ASSERT_PTR(ACTIVATION_DETAILS_PATH(details)); |
4c420328 LB |
975 | int r; |
976 | ||
4c420328 | 977 | assert(strv); |
4c420328 LB |
978 | |
979 | if (isempty(p->trigger_path_filename)) | |
980 | return 0; | |
981 | ||
69f3c619 | 982 | r = strv_extend_many(strv, "trigger_path", p->trigger_path_filename); |
4c420328 LB |
983 | if (r < 0) |
984 | return r; | |
985 | ||
986 | return 1; /* Return the number of pairs added to the env block */ | |
987 | } | |
988 | ||
01f78473 | 989 | static const char* const path_type_table[_PATH_TYPE_MAX] = { |
48d83e33 ZJS |
990 | [PATH_EXISTS] = "PathExists", |
991 | [PATH_EXISTS_GLOB] = "PathExistsGlob", | |
2c5859af | 992 | [PATH_DIRECTORY_NOT_EMPTY] = "DirectoryNotEmpty", |
48d83e33 ZJS |
993 | [PATH_CHANGED] = "PathChanged", |
994 | [PATH_MODIFIED] = "PathModified", | |
01f78473 LP |
995 | }; |
996 | ||
997 | DEFINE_STRING_TABLE_LOOKUP(path_type, PathType); | |
998 | ||
cd43ca73 | 999 | static const char* const path_result_table[_PATH_RESULT_MAX] = { |
40f41f34 DDM |
1000 | [PATH_SUCCESS] = "success", |
1001 | [PATH_FAILURE_RESOURCES] = "resources", | |
1002 | [PATH_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
1003 | [PATH_FAILURE_UNIT_START_LIMIT_HIT] = "unit-start-limit-hit", | |
aaae822b | 1004 | [PATH_FAILURE_TRIGGER_LIMIT_HIT] = "trigger-limit-hit", |
cd43ca73 LP |
1005 | }; |
1006 | ||
1007 | DEFINE_STRING_TABLE_LOOKUP(path_result, PathResult); | |
1008 | ||
01f78473 | 1009 | const UnitVTable path_vtable = { |
7d17cfbc | 1010 | .object_size = sizeof(Path), |
718db961 | 1011 | |
f975e971 LP |
1012 | .sections = |
1013 | "Unit\0" | |
1014 | "Path\0" | |
1015 | "Install\0", | |
5b9fbf89 YW |
1016 | .private_section = "Path", |
1017 | ||
1018 | .can_transient = true, | |
c80a9a33 LP |
1019 | .can_fail = true, |
1020 | .can_trigger = true, | |
01f78473 | 1021 | |
0e456f97 | 1022 | .init = path_init, |
01f78473 LP |
1023 | .done = path_done, |
1024 | .load = path_load, | |
1025 | ||
1026 | .coldplug = path_coldplug, | |
1027 | ||
1028 | .dump = path_dump, | |
1029 | ||
1030 | .start = path_start, | |
1031 | .stop = path_stop, | |
1032 | ||
1033 | .serialize = path_serialize, | |
1034 | .deserialize_item = path_deserialize_item, | |
1035 | ||
1036 | .active_state = path_active_state, | |
1037 | .sub_state_to_string = path_sub_state_to_string, | |
1038 | ||
3ecaa09b LP |
1039 | .trigger_notify = path_trigger_notify, |
1040 | ||
fdf20a31 | 1041 | .reset_failed = path_reset_failed, |
5632e374 | 1042 | |
5b9fbf89 | 1043 | .bus_set_property = bus_path_set_property, |
9727f242 | 1044 | |
705578c3 | 1045 | .can_start = path_can_start, |
01f78473 | 1046 | }; |
4c420328 LB |
1047 | |
1048 | const ActivationDetailsVTable activation_details_path_vtable = { | |
1049 | .object_size = sizeof(ActivationDetailsPath), | |
1050 | ||
1051 | .done = activation_details_path_done, | |
1052 | .serialize = activation_details_path_serialize, | |
1053 | .deserialize = activation_details_path_deserialize, | |
1054 | .append_env = activation_details_path_append_env, | |
1055 | .append_pair = activation_details_path_append_pair, | |
1056 | }; |