]> git.ipfire.org Git - thirdparty/systemd.git/blob - src/core/swap.c
projects / thirdparty / systemd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #6365 from keszybz/fast-tests
[thirdparty/systemd.git] / src / core / swap.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <errno.h>
21 #include <sys/epoll.h>
22 #include <sys/stat.h>
23 #include <unistd.h>
24
25 #include "libudev.h"
26
27 #include "alloc-util.h"
28 #include "dbus-swap.h"
29 #include "escape.h"
30 #include "exit-status.h"
31 #include "fd-util.h"
32 #include "format-util.h"
33 #include "fstab-util.h"
34 #include "parse-util.h"
35 #include "path-util.h"
36 #include "process-util.h"
37 #include "special.h"
38 #include "string-table.h"
39 #include "string-util.h"
40 #include "swap.h"
41 #include "udev-util.h"
42 #include "unit-name.h"
43 #include "unit.h"
44 #include "virt.h"
45
46 static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = {
47 [SWAP_DEAD] = UNIT_INACTIVE,
48 [SWAP_ACTIVATING] = UNIT_ACTIVATING,
49 [SWAP_ACTIVATING_DONE] = UNIT_ACTIVE,
50 [SWAP_ACTIVE] = UNIT_ACTIVE,
51 [SWAP_DEACTIVATING] = UNIT_DEACTIVATING,
52 [SWAP_ACTIVATING_SIGTERM] = UNIT_DEACTIVATING,
53 [SWAP_ACTIVATING_SIGKILL] = UNIT_DEACTIVATING,
54 [SWAP_DEACTIVATING_SIGTERM] = UNIT_DEACTIVATING,
55 [SWAP_DEACTIVATING_SIGKILL] = UNIT_DEACTIVATING,
56 [SWAP_FAILED] = UNIT_FAILED
57 };
58
59 static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
60 static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
61
62 static void swap_unset_proc_swaps(Swap *s) {
63 assert(s);
64
65 if (!s->from_proc_swaps)
66 return;
67
68 s->parameters_proc_swaps.what = mfree(s->parameters_proc_swaps.what);
69
70 s->from_proc_swaps = false;
71 }
72
73 static int swap_set_devnode(Swap *s, const char *devnode) {
74 Hashmap *swaps;
75 Swap *first;
76 int r;
77
78 assert(s);
79
80 r = hashmap_ensure_allocated(&UNIT(s)->manager->swaps_by_devnode, &string_hash_ops);
81 if (r < 0)
82 return r;
83
84 swaps = UNIT(s)->manager->swaps_by_devnode;
85
86 if (s->devnode) {
87 first = hashmap_get(swaps, s->devnode);
88
89 LIST_REMOVE(same_devnode, first, s);
90 if (first)
91 hashmap_replace(swaps, first->devnode, first);
92 else
93 hashmap_remove(swaps, s->devnode);
94
95 s->devnode = mfree(s->devnode);
96 }
97
98 if (devnode) {
99 s->devnode = strdup(devnode);
100 if (!s->devnode)
101 return -ENOMEM;
102
103 first = hashmap_get(swaps, s->devnode);
104 LIST_PREPEND(same_devnode, first, s);
105
106 return hashmap_replace(swaps, first->devnode, first);
107 }
108
109 return 0;
110 }
111
112 static void swap_init(Unit *u) {
113 Swap *s = SWAP(u);
114
115 assert(s);
116 assert(UNIT(s)->load_state == UNIT_STUB);
117
118 s->timeout_usec = u->manager->default_timeout_start_usec;
119
120 s->exec_context.std_output = u->manager->default_std_output;
121 s->exec_context.std_error = u->manager->default_std_error;
122
123 s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1;
124
125 s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
126
127 u->ignore_on_isolate = true;
128 }
129
130 static void swap_unwatch_control_pid(Swap *s) {
131 assert(s);
132
133 if (s->control_pid <= 0)
134 return;
135
136 unit_unwatch_pid(UNIT(s), s->control_pid);
137 s->control_pid = 0;
138 }
139
140 static void swap_done(Unit *u) {
141 Swap *s = SWAP(u);
142
143 assert(s);
144
145 swap_unset_proc_swaps(s);
146 swap_set_devnode(s, NULL);
147
148 s->what = mfree(s->what);
149 s->parameters_fragment.what = mfree(s->parameters_fragment.what);
150 s->parameters_fragment.options = mfree(s->parameters_fragment.options);
151
152 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
153 exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX);
154 s->control_command = NULL;
155
156 dynamic_creds_unref(&s->dynamic_creds);
157
158 swap_unwatch_control_pid(s);
159
160 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
161 }
162
163 static int swap_arm_timer(Swap *s, usec_t usec) {
164 int r;
165
166 assert(s);
167
168 if (s->timer_event_source) {
169 r = sd_event_source_set_time(s->timer_event_source, usec);
170 if (r < 0)
171 return r;
172
173 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
174 }
175
176 if (usec == USEC_INFINITY)
177 return 0;
178
179 r = sd_event_add_time(
180 UNIT(s)->manager->event,
181 &s->timer_event_source,
182 CLOCK_MONOTONIC,
183 usec, 0,
184 swap_dispatch_timer, s);
185 if (r < 0)
186 return r;
187
188 (void) sd_event_source_set_description(s->timer_event_source, "swap-timer");
189
190 return 0;
191 }
192
193 static int swap_add_device_links(Swap *s) {
194 assert(s);
195
196 if (!s->what)
197 return 0;
198
199 if (!s->from_fragment)
200 return 0;
201
202 if (is_device_path(s->what))
203 return unit_add_node_link(UNIT(s), s->what, MANAGER_IS_SYSTEM(UNIT(s)->manager), UNIT_BINDS_TO);
204 else
205 /* File based swap devices need to be ordered after
206 * systemd-remount-fs.service, since they might need a
207 * writable file system. */
208 return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true);
209 }
210
211 static int swap_add_default_dependencies(Swap *s) {
212 int r;
213
214 assert(s);
215
216 if (!UNIT(s)->default_dependencies)
217 return 0;
218
219 if (!MANAGER_IS_SYSTEM(UNIT(s)->manager))
220 return 0;
221
222 if (detect_container() > 0)
223 return 0;
224
225 /* swap units generated for the swap dev links are missing the
226 * ordering dep against the swap target. */
227 r = unit_add_dependency_by_name(UNIT(s), UNIT_BEFORE, SPECIAL_SWAP_TARGET, NULL, true);
228 if (r < 0)
229 return r;
230
231 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
232 }
233
234 static int swap_verify(Swap *s) {
235 _cleanup_free_ char *e = NULL;
236 int r;
237
238 if (UNIT(s)->load_state != UNIT_LOADED)
239 return 0;
240
241 r = unit_name_from_path(s->what, ".swap", &e);
242 if (r < 0)
243 return log_unit_error_errno(UNIT(s), r, "Failed to generate unit name from path: %m");
244
245 if (!unit_has_name(UNIT(s), e)) {
246 log_unit_error(UNIT(s), "Value of What= and unit name do not match, not loading.");
247 return -EINVAL;
248 }
249
250 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
251 log_unit_error(UNIT(s), "Unit has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.");
252 return -EINVAL;
253 }
254
255 return 0;
256 }
257
258 static int swap_load_devnode(Swap *s) {
259 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
260 struct stat st;
261 const char *p;
262
263 assert(s);
264
265 if (stat(s->what, &st) < 0 || !S_ISBLK(st.st_mode))
266 return 0;
267
268 d = udev_device_new_from_devnum(UNIT(s)->manager->udev, 'b', st.st_rdev);
269 if (!d)
270 return 0;
271
272 p = udev_device_get_devnode(d);
273 if (!p)
274 return 0;
275
276 return swap_set_devnode(s, p);
277 }
278
279 static int swap_load(Unit *u) {
280 int r;
281 Swap *s = SWAP(u);
282
283 assert(s);
284 assert(u->load_state == UNIT_STUB);
285
286 /* Load a .swap file */
287 r = unit_load_fragment_and_dropin_optional(u);
288 if (r < 0)
289 return r;
290
291 if (u->load_state == UNIT_LOADED) {
292
293 if (UNIT(s)->fragment_path)
294 s->from_fragment = true;
295
296 if (!s->what) {
297 if (s->parameters_fragment.what)
298 s->what = strdup(s->parameters_fragment.what);
299 else if (s->parameters_proc_swaps.what)
300 s->what = strdup(s->parameters_proc_swaps.what);
301 else {
302 r = unit_name_to_path(u->id, &s->what);
303 if (r < 0)
304 return r;
305 }
306
307 if (!s->what)
308 return -ENOMEM;
309 }
310
311 path_kill_slashes(s->what);
312
313 if (!UNIT(s)->description) {
314 r = unit_set_description(u, s->what);
315 if (r < 0)
316 return r;
317 }
318
319 r = unit_require_mounts_for(UNIT(s), s->what);
320 if (r < 0)
321 return r;
322
323 r = swap_add_device_links(s);
324 if (r < 0)
325 return r;
326
327 r = swap_load_devnode(s);
328 if (r < 0)
329 return r;
330
331 r = unit_patch_contexts(u);
332 if (r < 0)
333 return r;
334
335 r = unit_add_exec_dependencies(u, &s->exec_context);
336 if (r < 0)
337 return r;
338
339 r = unit_set_default_slice(u);
340 if (r < 0)
341 return r;
342
343 r = swap_add_default_dependencies(s);
344 if (r < 0)
345 return r;
346 }
347
348 return swap_verify(s);
349 }
350
351 static int swap_setup_unit(
352 Manager *m,
353 const char *what,
354 const char *what_proc_swaps,
355 int priority,
356 bool set_flags) {
357
358 _cleanup_free_ char *e = NULL;
359 bool delete = false;
360 Unit *u = NULL;
361 int r;
362 SwapParameters *p;
363
364 assert(m);
365 assert(what);
366 assert(what_proc_swaps);
367
368 r = unit_name_from_path(what, ".swap", &e);
369 if (r < 0)
370 return log_unit_error_errno(u, r, "Failed to generate unit name from path: %m");
371
372 u = manager_get_unit(m, e);
373
374 if (u &&
375 SWAP(u)->from_proc_swaps &&
376 !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) {
377 log_error("Swap %s appeared twice with different device paths %s and %s", e, SWAP(u)->parameters_proc_swaps.what, what_proc_swaps);
378 return -EEXIST;
379 }
380
381 if (!u) {
382 delete = true;
383
384 r = unit_new_for_name(m, sizeof(Swap), e, &u);
385 if (r < 0)
386 goto fail;
387
388 SWAP(u)->what = strdup(what);
389 if (!SWAP(u)->what) {
390 r = -ENOMEM;
391 goto fail;
392 }
393
394 unit_add_to_load_queue(u);
395 } else
396 delete = false;
397
398 p = &SWAP(u)->parameters_proc_swaps;
399
400 if (!p->what) {
401 p->what = strdup(what_proc_swaps);
402 if (!p->what) {
403 r = -ENOMEM;
404 goto fail;
405 }
406 }
407
408 if (set_flags) {
409 SWAP(u)->is_active = true;
410 SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps;
411 }
412
413 SWAP(u)->from_proc_swaps = true;
414
415 p->priority = priority;
416
417 unit_add_to_dbus_queue(u);
418 return 0;
419
420 fail:
421 log_unit_warning_errno(u, r, "Failed to load swap unit: %m");
422
423 if (delete)
424 unit_free(u);
425
426 return r;
427 }
428
429 static int swap_process_new(Manager *m, const char *device, int prio, bool set_flags) {
430 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
431 struct udev_list_entry *item = NULL, *first = NULL;
432 const char *dn;
433 struct stat st;
434 int r;
435
436 assert(m);
437
438 r = swap_setup_unit(m, device, device, prio, set_flags);
439 if (r < 0)
440 return r;
441
442 /* If this is a block device, then let's add duplicates for
443 * all other names of this block device */
444 if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode))
445 return 0;
446
447 d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev);
448 if (!d)
449 return 0;
450
451 /* Add the main device node */
452 dn = udev_device_get_devnode(d);
453 if (dn && !streq(dn, device))
454 swap_setup_unit(m, dn, device, prio, set_flags);
455
456 /* Add additional units for all symlinks */
457 first = udev_device_get_devlinks_list_entry(d);
458 udev_list_entry_foreach(item, first) {
459 const char *p;
460
461 /* Don't bother with the /dev/block links */
462 p = udev_list_entry_get_name(item);
463
464 if (streq(p, device))
465 continue;
466
467 if (path_startswith(p, "/dev/block/"))
468 continue;
469
470 if (stat(p, &st) >= 0)
471 if (!S_ISBLK(st.st_mode) ||
472 st.st_rdev != udev_device_get_devnum(d))
473 continue;
474
475 swap_setup_unit(m, p, device, prio, set_flags);
476 }
477
478 return r;
479 }
480
481 static void swap_set_state(Swap *s, SwapState state) {
482 SwapState old_state;
483 Swap *other;
484
485 assert(s);
486
487 old_state = s->state;
488 s->state = state;
489
490 if (!IN_SET(state,
491 SWAP_ACTIVATING,
492 SWAP_ACTIVATING_SIGTERM,
493 SWAP_ACTIVATING_SIGKILL,
494 SWAP_ACTIVATING_DONE,
495 SWAP_DEACTIVATING,
496 SWAP_DEACTIVATING_SIGTERM,
497 SWAP_DEACTIVATING_SIGKILL)) {
498 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
499 swap_unwatch_control_pid(s);
500 s->control_command = NULL;
501 s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
502 }
503
504 if (state != old_state)
505 log_unit_debug(UNIT(s), "Changed %s -> %s", swap_state_to_string(old_state), swap_state_to_string(state));
506
507 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
508
509 /* If there other units for the same device node have a job
510 queued it might be worth checking again if it is runnable
511 now. This is necessary, since swap_start() refuses
512 operation with EAGAIN if there's already another job for
513 the same device node queued. */
514 LIST_FOREACH_OTHERS(same_devnode, other, s)
515 if (UNIT(other)->job)
516 job_add_to_run_queue(UNIT(other)->job);
517 }
518
519 static int swap_coldplug(Unit *u) {
520 Swap *s = SWAP(u);
521 SwapState new_state = SWAP_DEAD;
522 int r;
523
524 assert(s);
525 assert(s->state == SWAP_DEAD);
526
527 if (s->deserialized_state != s->state)
528 new_state = s->deserialized_state;
529 else if (s->from_proc_swaps)
530 new_state = SWAP_ACTIVE;
531
532 if (new_state == s->state)
533 return 0;
534
535 if (s->control_pid > 0 &&
536 pid_is_unwaited(s->control_pid) &&
537 IN_SET(new_state,
538 SWAP_ACTIVATING,
539 SWAP_ACTIVATING_SIGTERM,
540 SWAP_ACTIVATING_SIGKILL,
541 SWAP_ACTIVATING_DONE,
542 SWAP_DEACTIVATING,
543 SWAP_DEACTIVATING_SIGTERM,
544 SWAP_DEACTIVATING_SIGKILL)) {
545
546 r = unit_watch_pid(UNIT(s), s->control_pid);
547 if (r < 0)
548 return r;
549
550 r = swap_arm_timer(s, usec_add(u->state_change_timestamp.monotonic, s->timeout_usec));
551 if (r < 0)
552 return r;
553 }
554
555 if (!IN_SET(new_state, SWAP_DEAD, SWAP_FAILED))
556 (void) unit_setup_dynamic_creds(u);
557
558 swap_set_state(s, new_state);
559 return 0;
560 }
561
562 static void swap_dump(Unit *u, FILE *f, const char *prefix) {
563 Swap *s = SWAP(u);
564 SwapParameters *p;
565
566 assert(s);
567 assert(f);
568
569 if (s->from_proc_swaps)
570 p = &s->parameters_proc_swaps;
571 else if (s->from_fragment)
572 p = &s->parameters_fragment;
573 else
574 p = NULL;
575
576 fprintf(f,
577 "%sSwap State: %s\n"
578 "%sResult: %s\n"
579 "%sWhat: %s\n"
580 "%sFrom /proc/swaps: %s\n"
581 "%sFrom fragment: %s\n",
582 prefix, swap_state_to_string(s->state),
583 prefix, swap_result_to_string(s->result),
584 prefix, s->what,
585 prefix, yes_no(s->from_proc_swaps),
586 prefix, yes_no(s->from_fragment));
587
588 if (s->devnode)
589 fprintf(f, "%sDevice Node: %s\n", prefix, s->devnode);
590
591 if (p)
592 fprintf(f,
593 "%sPriority: %i\n"
594 "%sOptions: %s\n",
595 prefix, p->priority,
596 prefix, strempty(p->options));
597
598 if (s->control_pid > 0)
599 fprintf(f,
600 "%sControl PID: "PID_FMT"\n",
601 prefix, s->control_pid);
602
603 exec_context_dump(&s->exec_context, f, prefix);
604 kill_context_dump(&s->kill_context, f, prefix);
605 }
606
607 static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
608 pid_t pid;
609 int r;
610 ExecParameters exec_params = {
611 .flags = EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN,
612 .stdin_fd = -1,
613 .stdout_fd = -1,
614 .stderr_fd = -1,
615 };
616
617 assert(s);
618 assert(c);
619 assert(_pid);
620
621 (void) unit_realize_cgroup(UNIT(s));
622 if (s->reset_cpu_usage) {
623 (void) unit_reset_cpu_usage(UNIT(s));
624 s->reset_cpu_usage = false;
625 }
626
627 r = unit_setup_exec_runtime(UNIT(s));
628 if (r < 0)
629 goto fail;
630
631 r = unit_setup_dynamic_creds(UNIT(s));
632 if (r < 0)
633 goto fail;
634
635 r = swap_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
636 if (r < 0)
637 goto fail;
638
639 r = manager_set_exec_params(UNIT(s)->manager, &exec_params);
640 if (r < 0)
641 goto fail;
642
643 exec_params.cgroup_path = UNIT(s)->cgroup_path;
644 exec_params.cgroup_delegate = s->cgroup_context.delegate;
645
646 r = exec_spawn(UNIT(s),
647 c,
648 &s->exec_context,
649 &exec_params,
650 s->exec_runtime,
651 &s->dynamic_creds,
652 &pid);
653 if (r < 0)
654 goto fail;
655
656 r = unit_watch_pid(UNIT(s), pid);
657 if (r < 0)
658 /* FIXME: we need to do something here */
659 goto fail;
660
661 *_pid = pid;
662
663 return 0;
664
665 fail:
666 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
667
668 return r;
669 }
670
671 static void swap_enter_dead(Swap *s, SwapResult f) {
672 assert(s);
673
674 if (s->result == SWAP_SUCCESS)
675 s->result = f;
676
677 swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD);
678
679 exec_runtime_destroy(s->exec_runtime);
680 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
681
682 exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
683
684 unit_unref_uid_gid(UNIT(s), true);
685
686 dynamic_creds_destroy(&s->dynamic_creds);
687 }
688
689 static void swap_enter_active(Swap *s, SwapResult f) {
690 assert(s);
691
692 if (s->result == SWAP_SUCCESS)
693 s->result = f;
694
695 swap_set_state(s, SWAP_ACTIVE);
696 }
697
698 static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) {
699 int r;
700 KillOperation kop;
701
702 assert(s);
703
704 if (s->result == SWAP_SUCCESS)
705 s->result = f;
706
707 if (IN_SET(state, SWAP_ACTIVATING_SIGTERM, SWAP_DEACTIVATING_SIGTERM))
708 kop = KILL_TERMINATE;
709 else
710 kop = KILL_KILL;
711
712 r = unit_kill_context(UNIT(s), &s->kill_context, kop, -1, s->control_pid, false);
713 if (r < 0)
714 goto fail;
715
716 if (r > 0) {
717 r = swap_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_usec));
718 if (r < 0)
719 goto fail;
720
721 swap_set_state(s, state);
722 } else if (state == SWAP_ACTIVATING_SIGTERM)
723 swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_SUCCESS);
724 else if (state == SWAP_DEACTIVATING_SIGTERM)
725 swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_SUCCESS);
726 else
727 swap_enter_dead(s, SWAP_SUCCESS);
728
729 return;
730
731 fail:
732 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
733 swap_enter_dead(s, SWAP_FAILURE_RESOURCES);
734 }
735
736 static void swap_enter_activating(Swap *s) {
737 _cleanup_free_ char *opts = NULL;
738 int r;
739
740 assert(s);
741
742 s->control_command_id = SWAP_EXEC_ACTIVATE;
743 s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE;
744
745 if (s->from_fragment) {
746 int priority = -1;
747
748 r = fstab_find_pri(s->parameters_fragment.options, &priority);
749 if (r < 0)
750 log_warning_errno(r, "Failed to parse swap priority \"%s\", ignoring: %m", s->parameters_fragment.options);
751 else if (r == 1 && s->parameters_fragment.priority >= 0)
752 log_warning("Duplicate swap priority configuration by Priority and Options fields.");
753
754 if (r <= 0 && s->parameters_fragment.priority >= 0) {
755 if (s->parameters_fragment.options)
756 r = asprintf(&opts, "%s,pri=%i", s->parameters_fragment.options, s->parameters_fragment.priority);
757 else
758 r = asprintf(&opts, "pri=%i", s->parameters_fragment.priority);
759 if (r < 0)
760 goto fail;
761 }
762 }
763
764 r = exec_command_set(s->control_command, "/sbin/swapon", NULL);
765 if (r < 0)
766 goto fail;
767
768 if (s->parameters_fragment.options || opts) {
769 r = exec_command_append(s->control_command, "-o",
770 opts ? : s->parameters_fragment.options, NULL);
771 if (r < 0)
772 goto fail;
773 }
774
775 r = exec_command_append(s->control_command, s->what, NULL);
776 if (r < 0)
777 goto fail;
778
779 swap_unwatch_control_pid(s);
780
781 r = swap_spawn(s, s->control_command, &s->control_pid);
782 if (r < 0)
783 goto fail;
784
785 swap_set_state(s, SWAP_ACTIVATING);
786
787 return;
788
789 fail:
790 log_unit_warning_errno(UNIT(s), r, "Failed to run 'swapon' task: %m");
791 swap_enter_dead(s, SWAP_FAILURE_RESOURCES);
792 }
793
794 static void swap_enter_deactivating(Swap *s) {
795 int r;
796
797 assert(s);
798
799 s->control_command_id = SWAP_EXEC_DEACTIVATE;
800 s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE;
801
802 r = exec_command_set(s->control_command,
803 "/sbin/swapoff",
804 s->what,
805 NULL);
806 if (r < 0)
807 goto fail;
808
809 swap_unwatch_control_pid(s);
810
811 r = swap_spawn(s, s->control_command, &s->control_pid);
812 if (r < 0)
813 goto fail;
814
815 swap_set_state(s, SWAP_DEACTIVATING);
816
817 return;
818
819 fail:
820 log_unit_warning_errno(UNIT(s), r, "Failed to run 'swapoff' task: %m");
821 swap_enter_active(s, SWAP_FAILURE_RESOURCES);
822 }
823
824 static int swap_start(Unit *u) {
825 Swap *s = SWAP(u), *other;
826 int r;
827
828 assert(s);
829
830 /* We cannot fulfill this request right now, try again later
831 * please! */
832
833 if (IN_SET(s->state,
834 SWAP_DEACTIVATING,
835 SWAP_DEACTIVATING_SIGTERM,
836 SWAP_DEACTIVATING_SIGKILL,
837 SWAP_ACTIVATING_SIGTERM,
838 SWAP_ACTIVATING_SIGKILL))
839 return -EAGAIN;
840
841 if (s->state == SWAP_ACTIVATING)
842 return 0;
843
844 assert(IN_SET(s->state, SWAP_DEAD, SWAP_FAILED));
845
846 if (detect_container() > 0)
847 return -EPERM;
848
849 /* If there's a job for another swap unit for the same node
850 * running, then let's not dispatch this one for now, and wait
851 * until that other job has finished. */
852 LIST_FOREACH_OTHERS(same_devnode, other, s)
853 if (UNIT(other)->job && UNIT(other)->job->state == JOB_RUNNING)
854 return -EAGAIN;
855
856 r = unit_start_limit_test(u);
857 if (r < 0) {
858 swap_enter_dead(s, SWAP_FAILURE_START_LIMIT_HIT);
859 return r;
860 }
861
862 r = unit_acquire_invocation_id(u);
863 if (r < 0)
864 return r;
865
866 s->result = SWAP_SUCCESS;
867 s->reset_cpu_usage = true;
868
869 swap_enter_activating(s);
870 return 1;
871 }
872
873 static int swap_stop(Unit *u) {
874 Swap *s = SWAP(u);
875
876 assert(s);
877
878 if (IN_SET(s->state,
879 SWAP_DEACTIVATING,
880 SWAP_DEACTIVATING_SIGTERM,
881 SWAP_DEACTIVATING_SIGKILL,
882 SWAP_ACTIVATING_SIGTERM,
883 SWAP_ACTIVATING_SIGKILL))
884 return 0;
885
886 assert(IN_SET(s->state, SWAP_ACTIVATING, SWAP_ACTIVATING_DONE, SWAP_ACTIVE));
887
888 if (detect_container() > 0)
889 return -EPERM;
890
891 swap_enter_deactivating(s);
892 return 1;
893 }
894
895 static int swap_serialize(Unit *u, FILE *f, FDSet *fds) {
896 Swap *s = SWAP(u);
897
898 assert(s);
899 assert(f);
900 assert(fds);
901
902 unit_serialize_item(u, f, "state", swap_state_to_string(s->state));
903 unit_serialize_item(u, f, "result", swap_result_to_string(s->result));
904
905 if (s->control_pid > 0)
906 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
907
908 if (s->control_command_id >= 0)
909 unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id));
910
911 return 0;
912 }
913
914 static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
915 Swap *s = SWAP(u);
916
917 assert(s);
918 assert(fds);
919
920 if (streq(key, "state")) {
921 SwapState state;
922
923 state = swap_state_from_string(value);
924 if (state < 0)
925 log_unit_debug(u, "Failed to parse state value: %s", value);
926 else
927 s->deserialized_state = state;
928 } else if (streq(key, "result")) {
929 SwapResult f;
930
931 f = swap_result_from_string(value);
932 if (f < 0)
933 log_unit_debug(u, "Failed to parse result value: %s", value);
934 else if (f != SWAP_SUCCESS)
935 s->result = f;
936 } else if (streq(key, "control-pid")) {
937 pid_t pid;
938
939 if (parse_pid(value, &pid) < 0)
940 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
941 else
942 s->control_pid = pid;
943
944 } else if (streq(key, "control-command")) {
945 SwapExecCommand id;
946
947 id = swap_exec_command_from_string(value);
948 if (id < 0)
949 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
950 else {
951 s->control_command_id = id;
952 s->control_command = s->exec_command + id;
953 }
954 } else
955 log_unit_debug(u, "Unknown serialization key: %s", key);
956
957 return 0;
958 }
959
960 _pure_ static UnitActiveState swap_active_state(Unit *u) {
961 assert(u);
962
963 return state_translation_table[SWAP(u)->state];
964 }
965
966 _pure_ static const char *swap_sub_state_to_string(Unit *u) {
967 assert(u);
968
969 return swap_state_to_string(SWAP(u)->state);
970 }
971
972 _pure_ static bool swap_check_gc(Unit *u) {
973 Swap *s = SWAP(u);
974
975 assert(s);
976
977 return s->from_proc_swaps;
978 }
979
980 static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) {
981 Swap *s = SWAP(u);
982 SwapResult f;
983
984 assert(s);
985 assert(pid >= 0);
986
987 if (pid != s->control_pid)
988 return;
989
990 s->control_pid = 0;
991
992 if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL))
993 f = SWAP_SUCCESS;
994 else if (code == CLD_EXITED)
995 f = SWAP_FAILURE_EXIT_CODE;
996 else if (code == CLD_KILLED)
997 f = SWAP_FAILURE_SIGNAL;
998 else if (code == CLD_DUMPED)
999 f = SWAP_FAILURE_CORE_DUMP;
1000 else
1001 assert_not_reached("Unknown code");
1002
1003 if (s->result == SWAP_SUCCESS)
1004 s->result = f;
1005
1006 if (s->control_command) {
1007 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
1008
1009 s->control_command = NULL;
1010 s->control_command_id = _SWAP_EXEC_COMMAND_INVALID;
1011 }
1012
1013 log_unit_full(u, f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
1014 "Swap process exited, code=%s status=%i", sigchld_code_to_string(code), status);
1015
1016 switch (s->state) {
1017
1018 case SWAP_ACTIVATING:
1019 case SWAP_ACTIVATING_DONE:
1020 case SWAP_ACTIVATING_SIGTERM:
1021 case SWAP_ACTIVATING_SIGKILL:
1022
1023 if (f == SWAP_SUCCESS)
1024 swap_enter_active(s, f);
1025 else
1026 swap_enter_dead(s, f);
1027 break;
1028
1029 case SWAP_DEACTIVATING:
1030 case SWAP_DEACTIVATING_SIGKILL:
1031 case SWAP_DEACTIVATING_SIGTERM:
1032
1033 swap_enter_dead(s, f);
1034 break;
1035
1036 default:
1037 assert_not_reached("Uh, control process died at wrong time.");
1038 }
1039
1040 /* Notify clients about changed exit status */
1041 unit_add_to_dbus_queue(u);
1042 }
1043
1044 static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
1045 Swap *s = SWAP(userdata);
1046
1047 assert(s);
1048 assert(s->timer_event_source == source);
1049
1050 switch (s->state) {
1051
1052 case SWAP_ACTIVATING:
1053 case SWAP_ACTIVATING_DONE:
1054 log_unit_warning(UNIT(s), "Activation timed out. Stopping.");
1055 swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT);
1056 break;
1057
1058 case SWAP_DEACTIVATING:
1059 log_unit_warning(UNIT(s), "Deactivation timed out. Stopping.");
1060 swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT);
1061 break;
1062
1063 case SWAP_ACTIVATING_SIGTERM:
1064 if (s->kill_context.send_sigkill) {
1065 log_unit_warning(UNIT(s), "Activation timed out. Killing.");
1066 swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
1067 } else {
1068 log_unit_warning(UNIT(s), "Activation timed out. Skipping SIGKILL. Ignoring.");
1069 swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
1070 }
1071 break;
1072
1073 case SWAP_DEACTIVATING_SIGTERM:
1074 if (s->kill_context.send_sigkill) {
1075 log_unit_warning(UNIT(s), "Deactivation timed out. Killing.");
1076 swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
1077 } else {
1078 log_unit_warning(UNIT(s), "Deactivation timed out. Skipping SIGKILL. Ignoring.");
1079 swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
1080 }
1081 break;
1082
1083 case SWAP_ACTIVATING_SIGKILL:
1084 case SWAP_DEACTIVATING_SIGKILL:
1085 log_unit_warning(UNIT(s), "Swap process still around after SIGKILL. Ignoring.");
1086 swap_enter_dead(s, SWAP_FAILURE_TIMEOUT);
1087 break;
1088
1089 default:
1090 assert_not_reached("Timeout at wrong time.");
1091 }
1092
1093 return 0;
1094 }
1095
1096 static int swap_load_proc_swaps(Manager *m, bool set_flags) {
1097 unsigned i;
1098 int r = 0;
1099
1100 assert(m);
1101
1102 rewind(m->proc_swaps);
1103
1104 (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n");
1105
1106 for (i = 1;; i++) {
1107 _cleanup_free_ char *dev = NULL, *d = NULL;
1108 int prio = 0, k;
1109
1110 k = fscanf(m->proc_swaps,
1111 "%ms " /* device/file */
1112 "%*s " /* type of swap */
1113 "%*s " /* swap size */
1114 "%*s " /* used */
1115 "%i\n", /* priority */
1116 &dev, &prio);
1117 if (k != 2) {
1118 if (k == EOF)
1119 break;
1120
1121 log_warning("Failed to parse /proc/swaps:%u.", i);
1122 continue;
1123 }
1124
1125 if (cunescape(dev, UNESCAPE_RELAX, &d) < 0)
1126 return log_oom();
1127
1128 device_found_node(m, d, true, DEVICE_FOUND_SWAP, set_flags);
1129
1130 k = swap_process_new(m, d, prio, set_flags);
1131 if (k < 0)
1132 r = k;
1133 }
1134
1135 return r;
1136 }
1137
1138 static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1139 Manager *m = userdata;
1140 Unit *u;
1141 int r;
1142
1143 assert(m);
1144 assert(revents & EPOLLPRI);
1145
1146 r = swap_load_proc_swaps(m, true);
1147 if (r < 0) {
1148 log_error_errno(r, "Failed to reread /proc/swaps: %m");
1149
1150 /* Reset flags, just in case, for late calls */
1151 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) {
1152 Swap *swap = SWAP(u);
1153
1154 swap->is_active = swap->just_activated = false;
1155 }
1156
1157 return 0;
1158 }
1159
1160 manager_dispatch_load_queue(m);
1161
1162 LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) {
1163 Swap *swap = SWAP(u);
1164
1165 if (!swap->is_active) {
1166 /* This has just been deactivated */
1167
1168 swap_unset_proc_swaps(swap);
1169
1170 switch (swap->state) {
1171
1172 case SWAP_ACTIVE:
1173 swap_enter_dead(swap, SWAP_SUCCESS);
1174 break;
1175
1176 default:
1177 /* Fire again */
1178 swap_set_state(swap, swap->state);
1179 break;
1180 }
1181
1182 if (swap->what)
1183 device_found_node(m, swap->what, false, DEVICE_FOUND_SWAP, true);
1184
1185 } else if (swap->just_activated) {
1186
1187 /* New swap entry */
1188
1189 switch (swap->state) {
1190
1191 case SWAP_DEAD:
1192 case SWAP_FAILED:
1193 (void) unit_acquire_invocation_id(UNIT(swap));
1194 swap_enter_active(swap, SWAP_SUCCESS);
1195 break;
1196
1197 case SWAP_ACTIVATING:
1198 swap_set_state(swap, SWAP_ACTIVATING_DONE);
1199 break;
1200
1201 default:
1202 /* Nothing really changed, but let's
1203 * issue an notification call
1204 * nonetheless, in case somebody is
1205 * waiting for this. */
1206 swap_set_state(swap, swap->state);
1207 break;
1208 }
1209 }
1210
1211 /* Reset the flags for later calls */
1212 swap->is_active = swap->just_activated = false;
1213 }
1214
1215 return 1;
1216 }
1217
1218 static Unit *swap_following(Unit *u) {
1219 Swap *s = SWAP(u);
1220 Swap *other, *first = NULL;
1221
1222 assert(s);
1223
1224 /* If the user configured the swap through /etc/fstab or
1225 * a device unit, follow that. */
1226
1227 if (s->from_fragment)
1228 return NULL;
1229
1230 LIST_FOREACH_OTHERS(same_devnode, other, s)
1231 if (other->from_fragment)
1232 return UNIT(other);
1233
1234 /* Otherwise, make everybody follow the unit that's named after
1235 * the swap device in the kernel */
1236
1237 if (streq_ptr(s->what, s->devnode))
1238 return NULL;
1239
1240 LIST_FOREACH_AFTER(same_devnode, other, s)
1241 if (streq_ptr(other->what, other->devnode))
1242 return UNIT(other);
1243
1244 LIST_FOREACH_BEFORE(same_devnode, other, s) {
1245 if (streq_ptr(other->what, other->devnode))
1246 return UNIT(other);
1247
1248 first = other;
1249 }
1250
1251 /* Fall back to the first on the list */
1252 return UNIT(first);
1253 }
1254
1255 static int swap_following_set(Unit *u, Set **_set) {
1256 Swap *s = SWAP(u), *other;
1257 Set *set;
1258 int r;
1259
1260 assert(s);
1261 assert(_set);
1262
1263 if (LIST_JUST_US(same_devnode, s)) {
1264 *_set = NULL;
1265 return 0;
1266 }
1267
1268 set = set_new(NULL);
1269 if (!set)
1270 return -ENOMEM;
1271
1272 LIST_FOREACH_OTHERS(same_devnode, other, s) {
1273 r = set_put(set, other);
1274 if (r < 0)
1275 goto fail;
1276 }
1277
1278 *_set = set;
1279 return 1;
1280
1281 fail:
1282 set_free(set);
1283 return r;
1284 }
1285
1286 static void swap_shutdown(Manager *m) {
1287 assert(m);
1288
1289 m->swap_event_source = sd_event_source_unref(m->swap_event_source);
1290
1291 m->proc_swaps = safe_fclose(m->proc_swaps);
1292
1293 m->swaps_by_devnode = hashmap_free(m->swaps_by_devnode);
1294 }
1295
1296 static void swap_enumerate(Manager *m) {
1297 int r;
1298
1299 assert(m);
1300
1301 if (!m->proc_swaps) {
1302 m->proc_swaps = fopen("/proc/swaps", "re");
1303 if (!m->proc_swaps) {
1304 if (errno == ENOENT)
1305 log_debug("Not swap enabled, skipping enumeration");
1306 else
1307 log_error_errno(errno, "Failed to open /proc/swaps: %m");
1308
1309 return;
1310 }
1311
1312 r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m);
1313 if (r < 0) {
1314 log_error_errno(r, "Failed to watch /proc/swaps: %m");
1315 goto fail;
1316 }
1317
1318 /* Dispatch this before we dispatch SIGCHLD, so that
1319 * we always get the events from /proc/swaps before
1320 * the SIGCHLD of /sbin/swapon. */
1321 r = sd_event_source_set_priority(m->swap_event_source, -10);
1322 if (r < 0) {
1323 log_error_errno(r, "Failed to change /proc/swaps priority: %m");
1324 goto fail;
1325 }
1326
1327 (void) sd_event_source_set_description(m->swap_event_source, "swap-proc");
1328 }
1329
1330 r = swap_load_proc_swaps(m, false);
1331 if (r < 0)
1332 goto fail;
1333
1334 return;
1335
1336 fail:
1337 swap_shutdown(m);
1338 }
1339
1340 int swap_process_device_new(Manager *m, struct udev_device *dev) {
1341 struct udev_list_entry *item = NULL, *first = NULL;
1342 _cleanup_free_ char *e = NULL;
1343 const char *dn;
1344 Unit *u;
1345 int r = 0;
1346
1347 assert(m);
1348 assert(dev);
1349
1350 dn = udev_device_get_devnode(dev);
1351 if (!dn)
1352 return 0;
1353
1354 r = unit_name_from_path(dn, ".swap", &e);
1355 if (r < 0)
1356 return r;
1357
1358 u = manager_get_unit(m, e);
1359 if (u)
1360 r = swap_set_devnode(SWAP(u), dn);
1361
1362 first = udev_device_get_devlinks_list_entry(dev);
1363 udev_list_entry_foreach(item, first) {
1364 _cleanup_free_ char *n = NULL;
1365 int q;
1366
1367 q = unit_name_from_path(udev_list_entry_get_name(item), ".swap", &n);
1368 if (q < 0)
1369 return q;
1370
1371 u = manager_get_unit(m, n);
1372 if (u) {
1373 q = swap_set_devnode(SWAP(u), dn);
1374 if (q < 0)
1375 r = q;
1376 }
1377 }
1378
1379 return r;
1380 }
1381
1382 int swap_process_device_remove(Manager *m, struct udev_device *dev) {
1383 const char *dn;
1384 int r = 0;
1385 Swap *s;
1386
1387 dn = udev_device_get_devnode(dev);
1388 if (!dn)
1389 return 0;
1390
1391 while ((s = hashmap_get(m->swaps_by_devnode, dn))) {
1392 int q;
1393
1394 q = swap_set_devnode(s, NULL);
1395 if (q < 0)
1396 r = q;
1397 }
1398
1399 return r;
1400 }
1401
1402 static void swap_reset_failed(Unit *u) {
1403 Swap *s = SWAP(u);
1404
1405 assert(s);
1406
1407 if (s->state == SWAP_FAILED)
1408 swap_set_state(s, SWAP_DEAD);
1409
1410 s->result = SWAP_SUCCESS;
1411 }
1412
1413 static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
1414 return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error);
1415 }
1416
1417 static int swap_get_timeout(Unit *u, usec_t *timeout) {
1418 Swap *s = SWAP(u);
1419 usec_t t;
1420 int r;
1421
1422 if (!s->timer_event_source)
1423 return 0;
1424
1425 r = sd_event_source_get_time(s->timer_event_source, &t);
1426 if (r < 0)
1427 return r;
1428 if (t == USEC_INFINITY)
1429 return 0;
1430
1431 *timeout = t;
1432 return 1;
1433 }
1434
1435 static bool swap_supported(void) {
1436 static int supported = -1;
1437
1438 /* If swap support is not available in the kernel, or we are
1439 * running in a container we don't support swap units, and any
1440 * attempts to starting one should fail immediately. */
1441
1442 if (supported < 0)
1443 supported =
1444 access("/proc/swaps", F_OK) >= 0 &&
1445 detect_container() <= 0;
1446
1447 return supported;
1448 }
1449
1450 static int swap_control_pid(Unit *u) {
1451 Swap *s = SWAP(u);
1452
1453 assert(s);
1454
1455 return s->control_pid;
1456 }
1457
1458 static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = {
1459 [SWAP_EXEC_ACTIVATE] = "ExecActivate",
1460 [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate",
1461 };
1462
1463 DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand);
1464
1465 static const char* const swap_result_table[_SWAP_RESULT_MAX] = {
1466 [SWAP_SUCCESS] = "success",
1467 [SWAP_FAILURE_RESOURCES] = "resources",
1468 [SWAP_FAILURE_TIMEOUT] = "timeout",
1469 [SWAP_FAILURE_EXIT_CODE] = "exit-code",
1470 [SWAP_FAILURE_SIGNAL] = "signal",
1471 [SWAP_FAILURE_CORE_DUMP] = "core-dump",
1472 [SWAP_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
1473 };
1474
1475 DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult);
1476
1477 const UnitVTable swap_vtable = {
1478 .object_size = sizeof(Swap),
1479 .exec_context_offset = offsetof(Swap, exec_context),
1480 .cgroup_context_offset = offsetof(Swap, cgroup_context),
1481 .kill_context_offset = offsetof(Swap, kill_context),
1482 .exec_runtime_offset = offsetof(Swap, exec_runtime),
1483 .dynamic_creds_offset = offsetof(Swap, dynamic_creds),
1484
1485 .sections =
1486 "Unit\0"
1487 "Swap\0"
1488 "Install\0",
1489 .private_section = "Swap",
1490
1491 .init = swap_init,
1492 .load = swap_load,
1493 .done = swap_done,
1494
1495 .coldplug = swap_coldplug,
1496
1497 .dump = swap_dump,
1498
1499 .start = swap_start,
1500 .stop = swap_stop,
1501
1502 .kill = swap_kill,
1503
1504 .get_timeout = swap_get_timeout,
1505
1506 .serialize = swap_serialize,
1507 .deserialize_item = swap_deserialize_item,
1508
1509 .active_state = swap_active_state,
1510 .sub_state_to_string = swap_sub_state_to_string,
1511
1512 .check_gc = swap_check_gc,
1513
1514 .sigchld_event = swap_sigchld_event,
1515
1516 .reset_failed = swap_reset_failed,
1517
1518 .control_pid = swap_control_pid,
1519
1520 .bus_vtable = bus_swap_vtable,
1521 .bus_set_property = bus_swap_set_property,
1522 .bus_commit_properties = bus_swap_commit_properties,
1523
1524 .following = swap_following,
1525 .following_set = swap_following_set,
1526
1527 .enumerate = swap_enumerate,
1528 .shutdown = swap_shutdown,
1529 .supported = swap_supported,
1530
1531 .status_message_formats = {
1532 .starting_stopping = {
1533 [0] = "Activating swap %s...",
1534 [1] = "Deactivating swap %s...",
1535 },
1536 .finished_start_job = {
1537 [JOB_DONE] = "Activated swap %s.",
1538 [JOB_FAILED] = "Failed to activate swap %s.",
1539 [JOB_TIMEOUT] = "Timed out activating swap %s.",
1540 },
1541 .finished_stop_job = {
1542 [JOB_DONE] = "Deactivated swap %s.",
1543 [JOB_FAILED] = "Failed deactivating swap %s.",
1544 [JOB_TIMEOUT] = "Timed out deactivating swap %s.",
1545 },
1546 },
1547 };
Unnamed repository; edit this file 'description' to name the repository.