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663996b3 MS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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 Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <limits.h> | |
24 | #include <unistd.h> | |
25 | #include <fcntl.h> | |
26 | #include <sys/epoll.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/swap.h> | |
29 | #include <libudev.h> | |
30 | ||
31 | #include "unit.h" | |
32 | #include "swap.h" | |
33 | #include "load-fragment.h" | |
34 | #include "load-dropin.h" | |
35 | #include "unit-name.h" | |
36 | #include "dbus-swap.h" | |
37 | #include "special.h" | |
38 | #include "bus-errors.h" | |
39 | #include "exit-status.h" | |
40 | #include "def.h" | |
41 | #include "path-util.h" | |
42 | #include "virt.h" | |
43 | ||
44 | static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { | |
45 | [SWAP_DEAD] = UNIT_INACTIVE, | |
46 | [SWAP_ACTIVATING] = UNIT_ACTIVATING, | |
47 | [SWAP_ACTIVE] = UNIT_ACTIVE, | |
48 | [SWAP_DEACTIVATING] = UNIT_DEACTIVATING, | |
49 | [SWAP_ACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
50 | [SWAP_ACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
51 | [SWAP_DEACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
52 | [SWAP_DEACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
53 | [SWAP_FAILED] = UNIT_FAILED | |
54 | }; | |
55 | ||
56 | static void swap_unset_proc_swaps(Swap *s) { | |
57 | Swap *first; | |
58 | Hashmap *swaps; | |
59 | ||
60 | assert(s); | |
61 | ||
62 | if (!s->parameters_proc_swaps.what) | |
63 | return; | |
64 | ||
65 | /* Remove this unit from the chain of swaps which share the | |
66 | * same kernel swap device. */ | |
67 | swaps = UNIT(s)->manager->swaps_by_proc_swaps; | |
68 | first = hashmap_get(swaps, s->parameters_proc_swaps.what); | |
69 | LIST_REMOVE(Swap, same_proc_swaps, first, s); | |
70 | ||
71 | if (first) | |
72 | hashmap_remove_and_replace(swaps, | |
73 | s->parameters_proc_swaps.what, | |
74 | first->parameters_proc_swaps.what, | |
75 | first); | |
76 | else | |
77 | hashmap_remove(swaps, s->parameters_proc_swaps.what); | |
78 | ||
79 | free(s->parameters_proc_swaps.what); | |
80 | s->parameters_proc_swaps.what = NULL; | |
81 | } | |
82 | ||
83 | static void swap_init(Unit *u) { | |
84 | Swap *s = SWAP(u); | |
85 | ||
86 | assert(s); | |
87 | assert(UNIT(s)->load_state == UNIT_STUB); | |
88 | ||
89 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
90 | ||
91 | exec_context_init(&s->exec_context); | |
92 | s->exec_context.std_output = u->manager->default_std_output; | |
93 | s->exec_context.std_error = u->manager->default_std_error; | |
94 | kill_context_init(&s->kill_context); | |
14228c0d | 95 | cgroup_context_init(&s->cgroup_context); |
663996b3 MS |
96 | |
97 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; | |
98 | ||
99 | s->timer_watch.type = WATCH_INVALID; | |
100 | ||
101 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
102 | ||
103 | UNIT(s)->ignore_on_isolate = true; | |
104 | } | |
105 | ||
106 | static void swap_unwatch_control_pid(Swap *s) { | |
107 | assert(s); | |
108 | ||
109 | if (s->control_pid <= 0) | |
110 | return; | |
111 | ||
112 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
113 | s->control_pid = 0; | |
114 | } | |
115 | ||
116 | static void swap_done(Unit *u) { | |
117 | Swap *s = SWAP(u); | |
118 | ||
119 | assert(s); | |
120 | ||
121 | swap_unset_proc_swaps(s); | |
122 | ||
123 | free(s->what); | |
124 | s->what = NULL; | |
125 | ||
126 | free(s->parameters_fragment.what); | |
127 | s->parameters_fragment.what = NULL; | |
128 | ||
129 | exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager)); | |
130 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); | |
131 | s->control_command = NULL; | |
132 | ||
14228c0d MB |
133 | cgroup_context_done(&s->cgroup_context); |
134 | ||
663996b3 MS |
135 | swap_unwatch_control_pid(s); |
136 | ||
137 | unit_unwatch_timer(u, &s->timer_watch); | |
138 | } | |
139 | ||
663996b3 MS |
140 | static int swap_add_device_links(Swap *s) { |
141 | SwapParameters *p; | |
142 | ||
143 | assert(s); | |
144 | ||
145 | if (!s->what) | |
146 | return 0; | |
147 | ||
148 | if (s->from_fragment) | |
149 | p = &s->parameters_fragment; | |
150 | else | |
151 | return 0; | |
152 | ||
153 | if (is_device_path(s->what)) | |
14228c0d | 154 | return unit_add_node_link(UNIT(s), s->what, !p->noauto && |
663996b3 MS |
155 | UNIT(s)->manager->running_as == SYSTEMD_SYSTEM); |
156 | else | |
157 | /* File based swap devices need to be ordered after | |
158 | * systemd-remount-fs.service, since they might need a | |
159 | * writable file system. */ | |
160 | return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); | |
161 | } | |
162 | ||
163 | static int swap_add_default_dependencies(Swap *s) { | |
14228c0d | 164 | bool nofail = false, noauto = false; |
663996b3 MS |
165 | int r; |
166 | ||
167 | assert(s); | |
168 | ||
169 | if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM) | |
170 | return 0; | |
171 | ||
172 | if (detect_container(NULL) > 0) | |
173 | return 0; | |
174 | ||
175 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); | |
176 | if (r < 0) | |
177 | return r; | |
178 | ||
14228c0d MB |
179 | if (s->from_fragment) { |
180 | SwapParameters *p = &s->parameters_fragment; | |
181 | ||
182 | nofail = p->nofail; | |
183 | noauto = p->noauto; | |
184 | } | |
185 | ||
186 | if (!noauto) { | |
187 | if (nofail) | |
188 | r = unit_add_dependency_by_name_inverse(UNIT(s), | |
189 | UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true); | |
190 | else | |
191 | r = unit_add_two_dependencies_by_name_inverse(UNIT(s), | |
192 | UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true); | |
193 | if (r < 0) | |
194 | return r; | |
195 | } | |
196 | ||
663996b3 MS |
197 | return 0; |
198 | } | |
199 | ||
200 | static int swap_verify(Swap *s) { | |
201 | bool b; | |
202 | _cleanup_free_ char *e = NULL; | |
203 | ||
204 | if (UNIT(s)->load_state != UNIT_LOADED) | |
205 | return 0; | |
206 | ||
207 | e = unit_name_from_path(s->what, ".swap"); | |
208 | if (e == NULL) | |
209 | return log_oom(); | |
210 | ||
211 | b = unit_has_name(UNIT(s), e); | |
212 | if (!b) { | |
213 | log_error_unit(UNIT(s)->id, | |
214 | "%s: Value of \"What\" and unit name do not match, not loading.", | |
215 | UNIT(s)->id); | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { | |
220 | log_error_unit(UNIT(s)->id, | |
221 | "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", | |
222 | UNIT(s)->id); | |
223 | return -EINVAL; | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | static int swap_load(Unit *u) { | |
230 | int r; | |
231 | Swap *s = SWAP(u); | |
232 | ||
233 | assert(s); | |
234 | assert(u->load_state == UNIT_STUB); | |
235 | ||
236 | /* Load a .swap file */ | |
237 | r = unit_load_fragment_and_dropin_optional(u); | |
238 | if (r < 0) | |
239 | return r; | |
240 | ||
241 | if (u->load_state == UNIT_LOADED) { | |
242 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
243 | if (r < 0) | |
244 | return r; | |
245 | ||
246 | if (UNIT(s)->fragment_path) | |
247 | s->from_fragment = true; | |
248 | ||
249 | if (!s->what) { | |
250 | if (s->parameters_fragment.what) | |
251 | s->what = strdup(s->parameters_fragment.what); | |
252 | else if (s->parameters_proc_swaps.what) | |
253 | s->what = strdup(s->parameters_proc_swaps.what); | |
254 | else | |
255 | s->what = unit_name_to_path(u->id); | |
256 | ||
257 | if (!s->what) | |
258 | return -ENOMEM; | |
259 | } | |
260 | ||
261 | path_kill_slashes(s->what); | |
262 | ||
263 | if (!UNIT(s)->description) | |
264 | if ((r = unit_set_description(u, s->what)) < 0) | |
265 | return r; | |
266 | ||
14228c0d | 267 | r = unit_require_mounts_for(UNIT(s), s->what); |
663996b3 MS |
268 | if (r < 0) |
269 | return r; | |
270 | ||
14228c0d | 271 | r = swap_add_device_links(s); |
663996b3 MS |
272 | if (r < 0) |
273 | return r; | |
274 | ||
14228c0d | 275 | r = unit_add_default_slice(u); |
663996b3 MS |
276 | if (r < 0) |
277 | return r; | |
278 | ||
279 | if (UNIT(s)->default_dependencies) { | |
280 | r = swap_add_default_dependencies(s); | |
281 | if (r < 0) | |
282 | return r; | |
283 | } | |
284 | ||
285 | r = unit_exec_context_defaults(u, &s->exec_context); | |
286 | if (r < 0) | |
287 | return r; | |
288 | } | |
289 | ||
290 | return swap_verify(s); | |
291 | } | |
292 | ||
293 | static int swap_add_one( | |
294 | Manager *m, | |
295 | const char *what, | |
296 | const char *what_proc_swaps, | |
297 | int priority, | |
298 | bool noauto, | |
299 | bool nofail, | |
300 | bool set_flags) { | |
301 | ||
302 | Unit *u = NULL; | |
303 | _cleanup_free_ char *e = NULL; | |
304 | char *wp = NULL; | |
305 | bool delete = false; | |
306 | int r; | |
307 | SwapParameters *p; | |
308 | Swap *first; | |
309 | ||
310 | assert(m); | |
311 | assert(what); | |
312 | assert(what_proc_swaps); | |
313 | ||
314 | e = unit_name_from_path(what, ".swap"); | |
315 | if (!e) | |
316 | return log_oom(); | |
317 | ||
318 | u = manager_get_unit(m, e); | |
319 | ||
320 | if (u && | |
321 | SWAP(u)->from_proc_swaps && | |
322 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
323 | return -EEXIST; | |
324 | ||
325 | if (!u) { | |
326 | delete = true; | |
327 | ||
328 | u = unit_new(m, sizeof(Swap)); | |
329 | if (!u) | |
330 | return log_oom(); | |
331 | ||
332 | r = unit_add_name(u, e); | |
333 | if (r < 0) | |
334 | goto fail; | |
335 | ||
336 | SWAP(u)->what = strdup(what); | |
337 | if (!SWAP(u)->what) { | |
338 | r = log_oom(); | |
339 | goto fail; | |
340 | } | |
341 | ||
342 | unit_add_to_load_queue(u); | |
343 | } else | |
344 | delete = false; | |
345 | ||
346 | p = &SWAP(u)->parameters_proc_swaps; | |
347 | ||
348 | if (!p->what) { | |
349 | wp = strdup(what_proc_swaps); | |
350 | if (!wp) { | |
351 | r = log_oom(); | |
352 | goto fail; | |
353 | } | |
354 | ||
355 | if (!m->swaps_by_proc_swaps) { | |
356 | m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func); | |
357 | if (!m->swaps_by_proc_swaps) { | |
358 | r = log_oom(); | |
359 | goto fail; | |
360 | } | |
361 | } | |
362 | ||
363 | free(p->what); | |
364 | p->what = wp; | |
365 | ||
366 | first = hashmap_get(m->swaps_by_proc_swaps, wp); | |
367 | LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); | |
368 | ||
369 | r = hashmap_replace(m->swaps_by_proc_swaps, wp, first); | |
370 | if (r < 0) | |
371 | goto fail; | |
372 | } | |
373 | ||
374 | if (set_flags) { | |
375 | SWAP(u)->is_active = true; | |
376 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
377 | } | |
378 | ||
379 | SWAP(u)->from_proc_swaps = true; | |
380 | ||
381 | p->priority = priority; | |
382 | p->noauto = noauto; | |
383 | p->nofail = nofail; | |
384 | ||
385 | unit_add_to_dbus_queue(u); | |
386 | ||
387 | return 0; | |
388 | ||
389 | fail: | |
390 | log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); | |
391 | ||
392 | free(wp); | |
393 | ||
394 | if (delete && u) | |
395 | unit_free(u); | |
396 | ||
397 | return r; | |
398 | } | |
399 | ||
400 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { | |
401 | struct stat st; | |
402 | int r = 0, k; | |
403 | ||
404 | assert(m); | |
405 | ||
406 | if (stat(device, &st) >= 0 && S_ISBLK(st.st_mode)) { | |
407 | struct udev_device *d; | |
408 | const char *dn; | |
409 | struct udev_list_entry *item = NULL, *first = NULL; | |
410 | ||
411 | /* So this is a proper swap device. Create swap units | |
412 | * for all names this swap device is known under */ | |
413 | ||
414 | d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); | |
415 | if (!d) | |
416 | return log_oom(); | |
417 | ||
418 | dn = udev_device_get_devnode(d); | |
419 | /* Skip dn==device, since that case will be handled below */ | |
420 | if (dn && !streq(dn, device)) | |
421 | r = swap_add_one(m, dn, device, prio, false, false, set_flags); | |
422 | ||
423 | /* Add additional units for all symlinks */ | |
424 | first = udev_device_get_devlinks_list_entry(d); | |
425 | udev_list_entry_foreach(item, first) { | |
426 | const char *p; | |
427 | ||
428 | /* Don't bother with the /dev/block links */ | |
429 | p = udev_list_entry_get_name(item); | |
430 | ||
431 | if (path_startswith(p, "/dev/block/")) | |
432 | continue; | |
433 | ||
434 | if (stat(p, &st) >= 0) | |
435 | if ((!S_ISBLK(st.st_mode)) || | |
436 | st.st_rdev != udev_device_get_devnum(d)) | |
437 | continue; | |
438 | ||
439 | k = swap_add_one(m, p, device, prio, false, false, set_flags); | |
440 | if (k < 0) | |
441 | r = k; | |
442 | } | |
443 | ||
444 | udev_device_unref(d); | |
445 | } | |
446 | ||
447 | k = swap_add_one(m, device, device, prio, false, false, set_flags); | |
448 | if (k < 0) | |
449 | r = k; | |
450 | ||
451 | return r; | |
452 | } | |
453 | ||
454 | static void swap_set_state(Swap *s, SwapState state) { | |
455 | SwapState old_state; | |
456 | ||
457 | assert(s); | |
458 | ||
459 | old_state = s->state; | |
460 | s->state = state; | |
461 | ||
462 | if (state != SWAP_ACTIVATING && | |
463 | state != SWAP_ACTIVATING_SIGTERM && | |
464 | state != SWAP_ACTIVATING_SIGKILL && | |
465 | state != SWAP_DEACTIVATING && | |
466 | state != SWAP_DEACTIVATING_SIGTERM && | |
467 | state != SWAP_DEACTIVATING_SIGKILL) { | |
468 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
469 | swap_unwatch_control_pid(s); | |
470 | s->control_command = NULL; | |
471 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
472 | } | |
473 | ||
474 | if (state != old_state) | |
475 | log_debug_unit(UNIT(s)->id, | |
476 | "%s changed %s -> %s", | |
477 | UNIT(s)->id, | |
478 | swap_state_to_string(old_state), | |
479 | swap_state_to_string(state)); | |
480 | ||
481 | unit_notify(UNIT(s), state_translation_table[old_state], | |
482 | state_translation_table[state], true); | |
483 | } | |
484 | ||
485 | static int swap_coldplug(Unit *u) { | |
486 | Swap *s = SWAP(u); | |
487 | SwapState new_state = SWAP_DEAD; | |
488 | int r; | |
489 | ||
490 | assert(s); | |
491 | assert(s->state == SWAP_DEAD); | |
492 | ||
493 | if (s->deserialized_state != s->state) | |
494 | new_state = s->deserialized_state; | |
495 | else if (s->from_proc_swaps) | |
496 | new_state = SWAP_ACTIVE; | |
497 | ||
498 | if (new_state != s->state) { | |
499 | ||
500 | if (new_state == SWAP_ACTIVATING || | |
501 | new_state == SWAP_ACTIVATING_SIGTERM || | |
502 | new_state == SWAP_ACTIVATING_SIGKILL || | |
503 | new_state == SWAP_DEACTIVATING || | |
504 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
505 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
506 | ||
507 | if (s->control_pid <= 0) | |
508 | return -EBADMSG; | |
509 | ||
510 | r = unit_watch_pid(UNIT(s), s->control_pid); | |
511 | if (r < 0) | |
512 | return r; | |
513 | ||
514 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); | |
515 | if (r < 0) | |
516 | return r; | |
517 | } | |
518 | ||
519 | swap_set_state(s, new_state); | |
520 | } | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
526 | Swap *s = SWAP(u); | |
527 | SwapParameters *p; | |
528 | ||
529 | assert(s); | |
530 | assert(f); | |
531 | ||
532 | if (s->from_proc_swaps) | |
533 | p = &s->parameters_proc_swaps; | |
534 | else if (s->from_fragment) | |
535 | p = &s->parameters_fragment; | |
536 | else | |
537 | p = NULL; | |
538 | ||
539 | fprintf(f, | |
540 | "%sSwap State: %s\n" | |
541 | "%sResult: %s\n" | |
542 | "%sWhat: %s\n" | |
543 | "%sFrom /proc/swaps: %s\n" | |
544 | "%sFrom fragment: %s\n", | |
545 | prefix, swap_state_to_string(s->state), | |
546 | prefix, swap_result_to_string(s->result), | |
547 | prefix, s->what, | |
548 | prefix, yes_no(s->from_proc_swaps), | |
549 | prefix, yes_no(s->from_fragment)); | |
550 | ||
551 | if (p) | |
552 | fprintf(f, | |
553 | "%sPriority: %i\n" | |
554 | "%sNoAuto: %s\n" | |
555 | "%sNoFail: %s\n", | |
556 | prefix, p->priority, | |
557 | prefix, yes_no(p->noauto), | |
558 | prefix, yes_no(p->nofail)); | |
559 | ||
560 | if (s->control_pid > 0) | |
561 | fprintf(f, | |
562 | "%sControl PID: %lu\n", | |
563 | prefix, (unsigned long) s->control_pid); | |
564 | ||
565 | exec_context_dump(&s->exec_context, f, prefix); | |
566 | kill_context_dump(&s->kill_context, f, prefix); | |
567 | } | |
568 | ||
569 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
570 | pid_t pid; | |
571 | int r; | |
572 | ||
573 | assert(s); | |
574 | assert(c); | |
575 | assert(_pid); | |
576 | ||
14228c0d MB |
577 | unit_realize_cgroup(UNIT(s)); |
578 | ||
663996b3 MS |
579 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); |
580 | if (r < 0) | |
581 | goto fail; | |
582 | ||
583 | r = exec_spawn(c, | |
584 | NULL, | |
585 | &s->exec_context, | |
586 | NULL, 0, | |
587 | UNIT(s)->manager->environment, | |
588 | true, | |
589 | true, | |
590 | true, | |
591 | UNIT(s)->manager->confirm_spawn, | |
14228c0d MB |
592 | UNIT(s)->manager->cgroup_supported, |
593 | UNIT(s)->cgroup_path, | |
663996b3 MS |
594 | UNIT(s)->id, |
595 | NULL, | |
596 | &pid); | |
597 | if (r < 0) | |
598 | goto fail; | |
599 | ||
600 | r = unit_watch_pid(UNIT(s), pid); | |
601 | if (r < 0) | |
602 | /* FIXME: we need to do something here */ | |
603 | goto fail; | |
604 | ||
605 | *_pid = pid; | |
606 | ||
607 | return 0; | |
608 | ||
609 | fail: | |
610 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
611 | ||
612 | return r; | |
613 | } | |
614 | ||
615 | static void swap_enter_dead(Swap *s, SwapResult f) { | |
616 | assert(s); | |
617 | ||
618 | if (f != SWAP_SUCCESS) | |
619 | s->result = f; | |
620 | ||
621 | exec_context_tmp_dirs_done(&s->exec_context); | |
622 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); | |
623 | } | |
624 | ||
625 | static void swap_enter_active(Swap *s, SwapResult f) { | |
626 | assert(s); | |
627 | ||
628 | if (f != SWAP_SUCCESS) | |
629 | s->result = f; | |
630 | ||
631 | swap_set_state(s, SWAP_ACTIVE); | |
632 | } | |
633 | ||
634 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { | |
635 | int r; | |
636 | ||
637 | assert(s); | |
638 | ||
639 | if (f != SWAP_SUCCESS) | |
640 | s->result = f; | |
641 | ||
642 | r = unit_kill_context( | |
643 | UNIT(s), | |
644 | &s->kill_context, | |
645 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
646 | -1, | |
647 | s->control_pid, | |
648 | false); | |
649 | if (r < 0) | |
650 | goto fail; | |
651 | ||
652 | if (r > 0) { | |
653 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); | |
654 | if (r < 0) | |
655 | goto fail; | |
656 | ||
657 | swap_set_state(s, state); | |
658 | } else | |
659 | swap_enter_dead(s, SWAP_SUCCESS); | |
660 | ||
661 | return; | |
662 | ||
663 | fail: | |
664 | log_warning_unit(UNIT(s)->id, | |
665 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
666 | ||
667 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); | |
668 | } | |
669 | ||
670 | static void swap_enter_activating(Swap *s) { | |
671 | int r, priority; | |
672 | ||
673 | assert(s); | |
674 | ||
675 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
676 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
677 | ||
678 | if (s->from_fragment) | |
679 | priority = s->parameters_fragment.priority; | |
680 | else | |
681 | priority = -1; | |
682 | ||
683 | if (priority >= 0) { | |
684 | char p[LINE_MAX]; | |
685 | ||
686 | snprintf(p, sizeof(p), "%i", priority); | |
687 | char_array_0(p); | |
688 | ||
689 | r = exec_command_set( | |
690 | s->control_command, | |
691 | "/sbin/swapon", | |
692 | "-p", | |
693 | p, | |
694 | s->what, | |
695 | NULL); | |
696 | } else | |
697 | r = exec_command_set( | |
698 | s->control_command, | |
699 | "/sbin/swapon", | |
700 | s->what, | |
701 | NULL); | |
702 | ||
703 | if (r < 0) | |
704 | goto fail; | |
705 | ||
706 | swap_unwatch_control_pid(s); | |
707 | ||
708 | r = swap_spawn(s, s->control_command, &s->control_pid); | |
709 | if (r < 0) | |
710 | goto fail; | |
711 | ||
712 | swap_set_state(s, SWAP_ACTIVATING); | |
713 | ||
714 | return; | |
715 | ||
716 | fail: | |
717 | log_warning_unit(UNIT(s)->id, | |
718 | "%s failed to run 'swapon' task: %s", | |
719 | UNIT(s)->id, strerror(-r)); | |
720 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); | |
721 | } | |
722 | ||
723 | static void swap_enter_deactivating(Swap *s) { | |
724 | int r; | |
725 | ||
726 | assert(s); | |
727 | ||
728 | s->control_command_id = SWAP_EXEC_DEACTIVATE; | |
729 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
730 | ||
731 | r = exec_command_set(s->control_command, | |
732 | "/sbin/swapoff", | |
733 | s->what, | |
734 | NULL); | |
735 | if (r < 0) | |
736 | goto fail; | |
737 | ||
738 | swap_unwatch_control_pid(s); | |
739 | ||
740 | r = swap_spawn(s, s->control_command, &s->control_pid); | |
741 | if (r < 0) | |
742 | goto fail; | |
743 | ||
744 | swap_set_state(s, SWAP_DEACTIVATING); | |
745 | ||
746 | return; | |
747 | ||
748 | fail: | |
749 | log_warning_unit(UNIT(s)->id, | |
750 | "%s failed to run 'swapoff' task: %s", | |
751 | UNIT(s)->id, strerror(-r)); | |
752 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); | |
753 | } | |
754 | ||
755 | static int swap_start(Unit *u) { | |
756 | Swap *s = SWAP(u); | |
757 | ||
758 | assert(s); | |
759 | ||
760 | /* We cannot fulfill this request right now, try again later | |
761 | * please! */ | |
762 | ||
763 | if (s->state == SWAP_DEACTIVATING || | |
764 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
765 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
766 | s->state == SWAP_ACTIVATING_SIGTERM || | |
767 | s->state == SWAP_ACTIVATING_SIGKILL) | |
768 | return -EAGAIN; | |
769 | ||
770 | if (s->state == SWAP_ACTIVATING) | |
771 | return 0; | |
772 | ||
773 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
774 | ||
775 | if (detect_container(NULL) > 0) | |
776 | return -EPERM; | |
777 | ||
778 | s->result = SWAP_SUCCESS; | |
779 | swap_enter_activating(s); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static int swap_stop(Unit *u) { | |
784 | Swap *s = SWAP(u); | |
785 | ||
786 | assert(s); | |
787 | ||
788 | if (s->state == SWAP_DEACTIVATING || | |
789 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
790 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
791 | s->state == SWAP_ACTIVATING_SIGTERM || | |
792 | s->state == SWAP_ACTIVATING_SIGKILL) | |
793 | return 0; | |
794 | ||
795 | assert(s->state == SWAP_ACTIVATING || | |
796 | s->state == SWAP_ACTIVE); | |
797 | ||
798 | if (detect_container(NULL) > 0) | |
799 | return -EPERM; | |
800 | ||
801 | swap_enter_deactivating(s); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
806 | Swap *s = SWAP(u); | |
807 | ||
808 | assert(s); | |
809 | assert(f); | |
810 | assert(fds); | |
811 | ||
812 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
813 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); | |
814 | ||
815 | if (s->control_pid > 0) | |
816 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
817 | ||
818 | if (s->control_command_id >= 0) | |
819 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
820 | ||
821 | exec_context_serialize(&s->exec_context, UNIT(s), f); | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
827 | Swap *s = SWAP(u); | |
828 | ||
829 | assert(s); | |
830 | assert(fds); | |
831 | ||
832 | if (streq(key, "state")) { | |
833 | SwapState state; | |
834 | ||
835 | state = swap_state_from_string(value); | |
836 | if (state < 0) | |
837 | log_debug_unit(u->id, "Failed to parse state value %s", value); | |
838 | else | |
839 | s->deserialized_state = state; | |
840 | } else if (streq(key, "result")) { | |
841 | SwapResult f; | |
842 | ||
843 | f = swap_result_from_string(value); | |
844 | if (f < 0) | |
845 | log_debug_unit(u->id, "Failed to parse result value %s", value); | |
846 | else if (f != SWAP_SUCCESS) | |
847 | s->result = f; | |
848 | } else if (streq(key, "control-pid")) { | |
849 | pid_t pid; | |
850 | ||
851 | if (parse_pid(value, &pid) < 0) | |
852 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); | |
853 | else | |
854 | s->control_pid = pid; | |
855 | ||
856 | } else if (streq(key, "control-command")) { | |
857 | SwapExecCommand id; | |
858 | ||
859 | id = swap_exec_command_from_string(value); | |
860 | if (id < 0) | |
861 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); | |
862 | else { | |
863 | s->control_command_id = id; | |
864 | s->control_command = s->exec_command + id; | |
865 | } | |
866 | } else if (streq(key, "tmp-dir")) { | |
867 | char *t; | |
868 | ||
869 | t = strdup(value); | |
870 | if (!t) | |
871 | return log_oom(); | |
872 | ||
873 | s->exec_context.tmp_dir = t; | |
874 | } else if (streq(key, "var-tmp-dir")) { | |
875 | char *t; | |
876 | ||
877 | t = strdup(value); | |
878 | if (!t) | |
879 | return log_oom(); | |
880 | ||
881 | s->exec_context.var_tmp_dir = t; | |
882 | } else | |
883 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | _pure_ static UnitActiveState swap_active_state(Unit *u) { | |
889 | assert(u); | |
890 | ||
891 | return state_translation_table[SWAP(u)->state]; | |
892 | } | |
893 | ||
894 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { | |
895 | assert(u); | |
896 | ||
897 | return swap_state_to_string(SWAP(u)->state); | |
898 | } | |
899 | ||
900 | _pure_ static bool swap_check_gc(Unit *u) { | |
901 | Swap *s = SWAP(u); | |
902 | ||
903 | assert(s); | |
904 | ||
905 | return s->from_proc_swaps; | |
906 | } | |
907 | ||
908 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
909 | Swap *s = SWAP(u); | |
910 | SwapResult f; | |
911 | ||
912 | assert(s); | |
913 | assert(pid >= 0); | |
914 | ||
915 | if (pid != s->control_pid) | |
916 | return; | |
917 | ||
918 | s->control_pid = 0; | |
919 | ||
920 | if (is_clean_exit(code, status, NULL)) | |
921 | f = SWAP_SUCCESS; | |
922 | else if (code == CLD_EXITED) | |
923 | f = SWAP_FAILURE_EXIT_CODE; | |
924 | else if (code == CLD_KILLED) | |
925 | f = SWAP_FAILURE_SIGNAL; | |
926 | else if (code == CLD_DUMPED) | |
927 | f = SWAP_FAILURE_CORE_DUMP; | |
928 | else | |
929 | assert_not_reached("Unknown code"); | |
930 | ||
931 | if (f != SWAP_SUCCESS) | |
932 | s->result = f; | |
933 | ||
934 | if (s->control_command) { | |
935 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); | |
936 | ||
937 | s->control_command = NULL; | |
938 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
939 | } | |
940 | ||
941 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, | |
942 | u->id, | |
943 | "%s swap process exited, code=%s status=%i", | |
944 | u->id, sigchld_code_to_string(code), status); | |
945 | ||
946 | switch (s->state) { | |
947 | ||
948 | case SWAP_ACTIVATING: | |
949 | case SWAP_ACTIVATING_SIGTERM: | |
950 | case SWAP_ACTIVATING_SIGKILL: | |
951 | ||
952 | if (f == SWAP_SUCCESS) | |
953 | swap_enter_active(s, f); | |
954 | else | |
955 | swap_enter_dead(s, f); | |
956 | break; | |
957 | ||
958 | case SWAP_DEACTIVATING: | |
959 | case SWAP_DEACTIVATING_SIGKILL: | |
960 | case SWAP_DEACTIVATING_SIGTERM: | |
961 | ||
962 | if (f == SWAP_SUCCESS) | |
963 | swap_enter_dead(s, f); | |
964 | else | |
965 | swap_enter_dead(s, f); | |
966 | break; | |
967 | ||
968 | default: | |
969 | assert_not_reached("Uh, control process died at wrong time."); | |
970 | } | |
971 | ||
972 | /* Notify clients about changed exit status */ | |
973 | unit_add_to_dbus_queue(u); | |
974 | ||
975 | /* Request a reload of /proc/swaps, so that following units | |
976 | * can follow our state change */ | |
977 | u->manager->request_reload = true; | |
978 | } | |
979 | ||
980 | static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) { | |
981 | Swap *s = SWAP(u); | |
982 | ||
983 | assert(s); | |
984 | assert(elapsed == 1); | |
985 | assert(w == &s->timer_watch); | |
986 | ||
987 | switch (s->state) { | |
988 | ||
989 | case SWAP_ACTIVATING: | |
990 | log_warning_unit(u->id, "%s activation timed out. Stopping.", u->id); | |
991 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); | |
992 | break; | |
993 | ||
994 | case SWAP_DEACTIVATING: | |
995 | log_warning_unit(u->id, "%s deactivation timed out. Stopping.", u->id); | |
996 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); | |
997 | break; | |
998 | ||
999 | case SWAP_ACTIVATING_SIGTERM: | |
1000 | if (s->kill_context.send_sigkill) { | |
1001 | log_warning_unit(u->id, "%s activation timed out. Killing.", u->id); | |
1002 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); | |
1003 | } else { | |
1004 | log_warning_unit(u->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", u->id); | |
1005 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); | |
1006 | } | |
1007 | break; | |
1008 | ||
1009 | case SWAP_DEACTIVATING_SIGTERM: | |
1010 | if (s->kill_context.send_sigkill) { | |
1011 | log_warning_unit(u->id, "%s deactivation timed out. Killing.", u->id); | |
1012 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); | |
1013 | } else { | |
1014 | log_warning_unit(u->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id); | |
1015 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); | |
1016 | } | |
1017 | break; | |
1018 | ||
1019 | case SWAP_ACTIVATING_SIGKILL: | |
1020 | case SWAP_DEACTIVATING_SIGKILL: | |
1021 | log_warning_unit(u->id, "%s swap process still around after SIGKILL. Ignoring.", u->id); | |
1022 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); | |
1023 | break; | |
1024 | ||
1025 | default: | |
1026 | assert_not_reached("Timeout at wrong time."); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1031 | unsigned i; | |
1032 | int r = 0; | |
1033 | ||
1034 | assert(m); | |
1035 | ||
1036 | rewind(m->proc_swaps); | |
1037 | ||
1038 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); | |
1039 | ||
1040 | for (i = 1;; i++) { | |
14228c0d | 1041 | _cleanup_free_ char *dev = NULL, *d = NULL; |
663996b3 MS |
1042 | int prio = 0, k; |
1043 | ||
1044 | k = fscanf(m->proc_swaps, | |
1045 | "%ms " /* device/file */ | |
1046 | "%*s " /* type of swap */ | |
1047 | "%*s " /* swap size */ | |
1048 | "%*s " /* used */ | |
1049 | "%i\n", /* priority */ | |
1050 | &dev, &prio); | |
1051 | if (k != 2) { | |
1052 | if (k == EOF) | |
1053 | break; | |
1054 | ||
1055 | log_warning("Failed to parse /proc/swaps:%u", i); | |
663996b3 MS |
1056 | continue; |
1057 | } | |
1058 | ||
1059 | d = cunescape(dev); | |
663996b3 MS |
1060 | if (!d) |
1061 | return -ENOMEM; | |
1062 | ||
1063 | k = swap_process_new_swap(m, d, prio, set_flags); | |
663996b3 MS |
1064 | if (k < 0) |
1065 | r = k; | |
1066 | } | |
1067 | ||
1068 | return r; | |
1069 | } | |
1070 | ||
1071 | int swap_dispatch_reload(Manager *m) { | |
1072 | /* This function should go as soon as the kernel properly notifies us */ | |
1073 | ||
1074 | if (_likely_(!m->request_reload)) | |
1075 | return 0; | |
1076 | ||
1077 | m->request_reload = false; | |
1078 | ||
1079 | return swap_fd_event(m, EPOLLPRI); | |
1080 | } | |
1081 | ||
1082 | int swap_fd_event(Manager *m, int events) { | |
1083 | Unit *u; | |
1084 | int r; | |
1085 | ||
1086 | assert(m); | |
1087 | assert(events & EPOLLPRI); | |
1088 | ||
1089 | r = swap_load_proc_swaps(m, true); | |
1090 | if (r < 0) { | |
1091 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); | |
1092 | ||
1093 | /* Reset flags, just in case, for late calls */ | |
1094 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { | |
1095 | Swap *swap = SWAP(u); | |
1096 | ||
1097 | swap->is_active = swap->just_activated = false; | |
1098 | } | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | manager_dispatch_load_queue(m); | |
1104 | ||
1105 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { | |
1106 | Swap *swap = SWAP(u); | |
1107 | ||
1108 | if (!swap->is_active) { | |
1109 | /* This has just been deactivated */ | |
1110 | ||
1111 | swap->from_proc_swaps = false; | |
1112 | swap_unset_proc_swaps(swap); | |
1113 | ||
1114 | switch (swap->state) { | |
1115 | ||
1116 | case SWAP_ACTIVE: | |
1117 | swap_enter_dead(swap, SWAP_SUCCESS); | |
1118 | break; | |
1119 | ||
1120 | default: | |
1121 | swap_set_state(swap, swap->state); | |
1122 | break; | |
1123 | } | |
1124 | ||
1125 | } else if (swap->just_activated) { | |
1126 | ||
1127 | /* New swap entry */ | |
1128 | ||
1129 | switch (swap->state) { | |
1130 | ||
1131 | case SWAP_DEAD: | |
1132 | case SWAP_FAILED: | |
1133 | swap_enter_active(swap, SWAP_SUCCESS); | |
1134 | break; | |
1135 | ||
1136 | default: | |
1137 | /* Nothing really changed, but let's | |
1138 | * issue an notification call | |
1139 | * nonetheless, in case somebody is | |
1140 | * waiting for this. */ | |
1141 | swap_set_state(swap, swap->state); | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /* Reset the flags for later calls */ | |
1147 | swap->is_active = swap->just_activated = false; | |
1148 | } | |
1149 | ||
1150 | return 1; | |
1151 | } | |
1152 | ||
1153 | static Unit *swap_following(Unit *u) { | |
1154 | Swap *s = SWAP(u); | |
1155 | Swap *other, *first = NULL; | |
1156 | ||
1157 | assert(s); | |
1158 | ||
1159 | if (streq_ptr(s->what, s->parameters_proc_swaps.what)) | |
1160 | return NULL; | |
1161 | ||
1162 | /* Make everybody follow the unit that's named after the swap | |
1163 | * device in the kernel */ | |
1164 | ||
1165 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1166 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1167 | return UNIT(other); | |
1168 | ||
1169 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) { | |
1170 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1171 | return UNIT(other); | |
1172 | ||
1173 | first = other; | |
1174 | } | |
1175 | ||
1176 | return UNIT(first); | |
1177 | } | |
1178 | ||
1179 | static int swap_following_set(Unit *u, Set **_set) { | |
1180 | Swap *s = SWAP(u); | |
1181 | Swap *other; | |
1182 | Set *set; | |
1183 | int r; | |
1184 | ||
1185 | assert(s); | |
1186 | assert(_set); | |
1187 | ||
1188 | if (LIST_JUST_US(same_proc_swaps, s)) { | |
1189 | *_set = NULL; | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | if (!(set = set_new(NULL, NULL))) | |
1194 | return -ENOMEM; | |
1195 | ||
1196 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1197 | if ((r = set_put(set, other)) < 0) | |
1198 | goto fail; | |
1199 | ||
1200 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) | |
1201 | if ((r = set_put(set, other)) < 0) | |
1202 | goto fail; | |
1203 | ||
1204 | *_set = set; | |
1205 | return 1; | |
1206 | ||
1207 | fail: | |
1208 | set_free(set); | |
1209 | return r; | |
1210 | } | |
1211 | ||
1212 | static void swap_shutdown(Manager *m) { | |
1213 | assert(m); | |
1214 | ||
1215 | if (m->proc_swaps) { | |
1216 | fclose(m->proc_swaps); | |
1217 | m->proc_swaps = NULL; | |
1218 | } | |
1219 | ||
1220 | hashmap_free(m->swaps_by_proc_swaps); | |
1221 | m->swaps_by_proc_swaps = NULL; | |
1222 | } | |
1223 | ||
1224 | static int swap_enumerate(Manager *m) { | |
1225 | int r; | |
1226 | assert(m); | |
1227 | ||
1228 | if (!m->proc_swaps) { | |
1229 | struct epoll_event ev = { | |
1230 | .events = EPOLLPRI, | |
1231 | .data.ptr = &m->swap_watch, | |
1232 | }; | |
1233 | ||
1234 | m->proc_swaps = fopen("/proc/swaps", "re"); | |
1235 | if (!m->proc_swaps) | |
1236 | return (errno == ENOENT) ? 0 : -errno; | |
1237 | ||
1238 | m->swap_watch.type = WATCH_SWAP; | |
1239 | m->swap_watch.fd = fileno(m->proc_swaps); | |
1240 | ||
1241 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0) | |
1242 | return -errno; | |
1243 | } | |
1244 | ||
1245 | r = swap_load_proc_swaps(m, false); | |
1246 | if (r < 0) | |
1247 | swap_shutdown(m); | |
1248 | ||
1249 | return r; | |
1250 | } | |
1251 | ||
1252 | static void swap_reset_failed(Unit *u) { | |
1253 | Swap *s = SWAP(u); | |
1254 | ||
1255 | assert(s); | |
1256 | ||
1257 | if (s->state == SWAP_FAILED) | |
1258 | swap_set_state(s, SWAP_DEAD); | |
1259 | ||
1260 | s->result = SWAP_SUCCESS; | |
1261 | } | |
1262 | ||
1263 | static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) { | |
1264 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); | |
1265 | } | |
1266 | ||
1267 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { | |
1268 | [SWAP_DEAD] = "dead", | |
1269 | [SWAP_ACTIVATING] = "activating", | |
1270 | [SWAP_ACTIVE] = "active", | |
1271 | [SWAP_DEACTIVATING] = "deactivating", | |
1272 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1273 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1274 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1275 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
1276 | [SWAP_FAILED] = "failed" | |
1277 | }; | |
1278 | ||
1279 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1280 | ||
1281 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { | |
1282 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1283 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1284 | }; | |
1285 | ||
1286 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1287 | ||
1288 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { | |
1289 | [SWAP_SUCCESS] = "success", | |
1290 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1291 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1292 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1293 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1294 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1295 | }; | |
1296 | ||
1297 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1298 | ||
1299 | const UnitVTable swap_vtable = { | |
1300 | .object_size = sizeof(Swap), | |
1301 | ||
1302 | .sections = | |
1303 | "Unit\0" | |
1304 | "Swap\0" | |
1305 | "Install\0", | |
1306 | ||
14228c0d | 1307 | .private_section = "Swap", |
663996b3 | 1308 | .exec_context_offset = offsetof(Swap, exec_context), |
14228c0d | 1309 | .cgroup_context_offset = offsetof(Swap, cgroup_context), |
663996b3 MS |
1310 | |
1311 | .no_alias = true, | |
1312 | .no_instances = true, | |
1313 | ||
1314 | .init = swap_init, | |
1315 | .load = swap_load, | |
1316 | .done = swap_done, | |
1317 | ||
1318 | .coldplug = swap_coldplug, | |
1319 | ||
1320 | .dump = swap_dump, | |
1321 | ||
1322 | .start = swap_start, | |
1323 | .stop = swap_stop, | |
1324 | ||
1325 | .kill = swap_kill, | |
1326 | ||
1327 | .serialize = swap_serialize, | |
1328 | .deserialize_item = swap_deserialize_item, | |
1329 | ||
1330 | .active_state = swap_active_state, | |
1331 | .sub_state_to_string = swap_sub_state_to_string, | |
1332 | ||
1333 | .check_gc = swap_check_gc, | |
1334 | ||
1335 | .sigchld_event = swap_sigchld_event, | |
1336 | .timer_event = swap_timer_event, | |
1337 | ||
1338 | .reset_failed = swap_reset_failed, | |
1339 | ||
1340 | .bus_interface = "org.freedesktop.systemd1.Swap", | |
1341 | .bus_message_handler = bus_swap_message_handler, | |
1342 | .bus_invalidating_properties = bus_swap_invalidating_properties, | |
14228c0d MB |
1343 | .bus_set_property = bus_swap_set_property, |
1344 | .bus_commit_properties = bus_swap_commit_properties, | |
663996b3 MS |
1345 | |
1346 | .following = swap_following, | |
1347 | .following_set = swap_following_set, | |
1348 | ||
1349 | .enumerate = swap_enumerate, | |
1350 | .shutdown = swap_shutdown, | |
1351 | ||
1352 | .status_message_formats = { | |
1353 | .starting_stopping = { | |
1354 | [0] = "Activating swap %s...", | |
1355 | [1] = "Deactivating swap %s...", | |
1356 | }, | |
1357 | .finished_start_job = { | |
1358 | [JOB_DONE] = "Activated swap %s.", | |
1359 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1360 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1361 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1362 | }, | |
1363 | .finished_stop_job = { | |
1364 | [JOB_DONE] = "Deactivated swap %s.", | |
1365 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1366 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1367 | }, | |
1368 | }, | |
1369 | }; |