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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
07b0b134 ML |
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 | |
5430f7f2 LP |
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 | |
07b0b134 ML |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
07b0b134 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
07b0b134 ML |
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> | |
e04aad61 | 29 | #include <libudev.h> |
07b0b134 ML |
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" | |
514f4ef5 | 37 | #include "special.h" |
8a0867d6 | 38 | #include "bus-errors.h" |
9a57c629 | 39 | #include "exit-status.h" |
f6a6225e | 40 | #include "def.h" |
9eb977db | 41 | #include "path-util.h" |
a5c3034f | 42 | #include "virt.h" |
07b0b134 ML |
43 | |
44 | static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { | |
45 | [SWAP_DEAD] = UNIT_INACTIVE, | |
e04aad61 | 46 | [SWAP_ACTIVATING] = UNIT_ACTIVATING, |
07b0b134 | 47 | [SWAP_ACTIVE] = UNIT_ACTIVE, |
e04aad61 LP |
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, | |
fdf20a31 | 53 | [SWAP_FAILED] = UNIT_FAILED |
07b0b134 ML |
54 | }; |
55 | ||
e04aad61 LP |
56 | static void swap_unset_proc_swaps(Swap *s) { |
57 | Swap *first; | |
58 | ||
59 | assert(s); | |
60 | ||
61 | if (!s->parameters_proc_swaps.what) | |
62 | return; | |
63 | ||
64 | /* Remove this unit from the chain of swaps which share the | |
65 | * same kernel swap device. */ | |
66 | ||
1124fe6f | 67 | first = hashmap_get(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what); |
e04aad61 LP |
68 | LIST_REMOVE(Swap, same_proc_swaps, first, s); |
69 | ||
70 | if (first) | |
1124fe6f | 71 | hashmap_remove_and_replace(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what, first->parameters_proc_swaps.what, first); |
e04aad61 | 72 | else |
1124fe6f | 73 | hashmap_remove(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what); |
e04aad61 LP |
74 | |
75 | free(s->parameters_proc_swaps.what); | |
76 | s->parameters_proc_swaps.what = NULL; | |
77 | } | |
78 | ||
f6cebb3b | 79 | static void swap_init(Unit *u) { |
6e620bec LP |
80 | Swap *s = SWAP(u); |
81 | ||
82 | assert(s); | |
1124fe6f | 83 | assert(UNIT(s)->load_state == UNIT_STUB); |
6e620bec | 84 | |
e04aad61 LP |
85 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; |
86 | ||
87 | exec_context_init(&s->exec_context); | |
ac155bb8 MS |
88 | s->exec_context.std_output = u->manager->default_std_output; |
89 | s->exec_context.std_error = u->manager->default_std_error; | |
4819ff03 | 90 | kill_context_init(&s->kill_context); |
e04aad61 | 91 | |
6b1dc2bd | 92 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; |
e04aad61 LP |
93 | |
94 | s->timer_watch.type = WATCH_INVALID; | |
95 | ||
e1770af8 | 96 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; |
c8f4d764 | 97 | |
1124fe6f | 98 | UNIT(s)->ignore_on_isolate = true; |
e04aad61 LP |
99 | } |
100 | ||
101 | static void swap_unwatch_control_pid(Swap *s) { | |
102 | assert(s); | |
103 | ||
104 | if (s->control_pid <= 0) | |
105 | return; | |
106 | ||
107 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
108 | s->control_pid = 0; | |
6e620bec LP |
109 | } |
110 | ||
4e85aff4 LP |
111 | static void swap_done(Unit *u) { |
112 | Swap *s = SWAP(u); | |
07b0b134 | 113 | |
4e85aff4 | 114 | assert(s); |
07b0b134 | 115 | |
e04aad61 LP |
116 | swap_unset_proc_swaps(s); |
117 | ||
4e85aff4 | 118 | free(s->what); |
e04aad61 LP |
119 | s->what = NULL; |
120 | ||
4e85aff4 | 121 | free(s->parameters_fragment.what); |
6b1dc2bd | 122 | s->parameters_fragment.what = NULL; |
e04aad61 LP |
123 | |
124 | exec_context_done(&s->exec_context); | |
125 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); | |
126 | s->control_command = NULL; | |
127 | ||
128 | swap_unwatch_control_pid(s); | |
129 | ||
130 | unit_unwatch_timer(u, &s->timer_watch); | |
07b0b134 ML |
131 | } |
132 | ||
6e2ef85b LP |
133 | int swap_add_one_mount_link(Swap *s, Mount *m) { |
134 | int r; | |
135 | ||
136 | assert(s); | |
137 | assert(m); | |
138 | ||
1124fe6f MS |
139 | if (UNIT(s)->load_state != UNIT_LOADED || |
140 | UNIT(m)->load_state != UNIT_LOADED) | |
6e2ef85b LP |
141 | return 0; |
142 | ||
8407a5d0 LP |
143 | if (is_device_path(s->what)) |
144 | return 0; | |
145 | ||
6e2ef85b LP |
146 | if (!path_startswith(s->what, m->where)) |
147 | return 0; | |
148 | ||
2c966c03 | 149 | if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0) |
6e2ef85b LP |
150 | return r; |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int swap_add_mount_links(Swap *s) { | |
ac155bb8 | 156 | Unit *other; |
6e2ef85b LP |
157 | int r; |
158 | ||
159 | assert(s); | |
160 | ||
1124fe6f | 161 | LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_MOUNT]) |
595ed347 | 162 | if ((r = swap_add_one_mount_link(s, MOUNT(other))) < 0) |
6e2ef85b LP |
163 | return r; |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
07b0b134 | 168 | static int swap_add_target_links(Swap *s) { |
07b0b134 ML |
169 | Unit *tu; |
170 | int r; | |
171 | ||
4e85aff4 LP |
172 | assert(s); |
173 | ||
6b1dc2bd | 174 | if (!s->from_fragment) |
4e85aff4 LP |
175 | return 0; |
176 | ||
c0387ebf LP |
177 | r = manager_load_unit(UNIT(s)->manager, SPECIAL_SWAP_TARGET, NULL, NULL, &tu); |
178 | if (r < 0) | |
07b0b134 ML |
179 | return r; |
180 | ||
07b0b134 ML |
181 | return unit_add_dependency(UNIT(s), UNIT_BEFORE, tu, true); |
182 | } | |
183 | ||
173a8d04 LP |
184 | static int swap_add_device_links(Swap *s) { |
185 | SwapParameters *p; | |
186 | ||
187 | assert(s); | |
188 | ||
189 | if (!s->what) | |
190 | return 0; | |
191 | ||
192 | if (s->from_fragment) | |
193 | p = &s->parameters_fragment; | |
173a8d04 LP |
194 | else |
195 | return 0; | |
196 | ||
cfcfd4ae LP |
197 | if (is_device_path(s->what)) |
198 | return unit_add_node_link(UNIT(s), s->what, | |
199 | !p->noauto && p->nofail && | |
1124fe6f | 200 | UNIT(s)->manager->running_as == MANAGER_SYSTEM); |
cfcfd4ae LP |
201 | else |
202 | /* File based swap devices need to be ordered after | |
2b93b027 | 203 | * systemd-remount-fs.service, since they might need a |
cfcfd4ae | 204 | * writable file system. */ |
2b93b027 | 205 | return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); |
173a8d04 LP |
206 | } |
207 | ||
2edd4434 LP |
208 | static int swap_add_default_dependencies(Swap *s) { |
209 | int r; | |
210 | ||
211 | assert(s); | |
212 | ||
6b1dc2bd LP |
213 | if (UNIT(s)->manager->running_as != MANAGER_SYSTEM) |
214 | return 0; | |
2edd4434 | 215 | |
c0387ebf LP |
216 | if (detect_container(NULL) > 0) |
217 | return 0; | |
218 | ||
6b1dc2bd LP |
219 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); |
220 | if (r < 0) | |
221 | return r; | |
2edd4434 LP |
222 | |
223 | return 0; | |
224 | } | |
225 | ||
4e85aff4 LP |
226 | static int swap_verify(Swap *s) { |
227 | bool b; | |
228 | char *e; | |
229 | ||
1124fe6f | 230 | if (UNIT(s)->load_state != UNIT_LOADED) |
4e85aff4 LP |
231 | return 0; |
232 | ||
233 | if (!(e = unit_name_from_path(s->what, ".swap"))) | |
234 | return -ENOMEM; | |
235 | ||
236 | b = unit_has_name(UNIT(s), e); | |
237 | free(e); | |
238 | ||
239 | if (!b) { | |
1124fe6f | 240 | log_error("%s: Value of \"What\" and unit name do not match, not loading.\n", UNIT(s)->id); |
4e85aff4 LP |
241 | return -EINVAL; |
242 | } | |
243 | ||
4819ff03 | 244 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
1124fe6f | 245 | log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id); |
e04aad61 LP |
246 | return -EINVAL; |
247 | } | |
248 | ||
4e85aff4 LP |
249 | return 0; |
250 | } | |
251 | ||
07b0b134 ML |
252 | static int swap_load(Unit *u) { |
253 | int r; | |
254 | Swap *s = SWAP(u); | |
255 | ||
256 | assert(s); | |
ac155bb8 | 257 | assert(u->load_state == UNIT_STUB); |
07b0b134 ML |
258 | |
259 | /* Load a .swap file */ | |
260 | if ((r = unit_load_fragment_and_dropin_optional(u)) < 0) | |
261 | return r; | |
262 | ||
ac155bb8 | 263 | if (u->load_state == UNIT_LOADED) { |
27abbe82 LP |
264 | if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) |
265 | return r; | |
4e85aff4 | 266 | |
1124fe6f | 267 | if (UNIT(s)->fragment_path) |
4e85aff4 LP |
268 | s->from_fragment = true; |
269 | ||
270 | if (!s->what) { | |
271 | if (s->parameters_fragment.what) | |
272 | s->what = strdup(s->parameters_fragment.what); | |
4e85aff4 LP |
273 | else if (s->parameters_proc_swaps.what) |
274 | s->what = strdup(s->parameters_proc_swaps.what); | |
275 | else | |
ac155bb8 | 276 | s->what = unit_name_to_path(u->id); |
4e85aff4 LP |
277 | |
278 | if (!s->what) | |
07b0b134 | 279 | return -ENOMEM; |
4e85aff4 | 280 | } |
07b0b134 ML |
281 | |
282 | path_kill_slashes(s->what); | |
283 | ||
1124fe6f | 284 | if (!UNIT(s)->description) |
4e85aff4 LP |
285 | if ((r = unit_set_description(u, s->what)) < 0) |
286 | return r; | |
287 | ||
173a8d04 | 288 | if ((r = swap_add_device_links(s)) < 0) |
07b0b134 ML |
289 | return r; |
290 | ||
6e2ef85b LP |
291 | if ((r = swap_add_mount_links(s)) < 0) |
292 | return r; | |
07b0b134 ML |
293 | |
294 | if ((r = swap_add_target_links(s)) < 0) | |
295 | return r; | |
2edd4434 | 296 | |
d686d8a9 | 297 | if ((r = unit_add_default_cgroups(u)) < 0) |
f1a1cd64 LP |
298 | return r; |
299 | ||
1124fe6f | 300 | if (UNIT(s)->default_dependencies) |
2edd4434 LP |
301 | if ((r = swap_add_default_dependencies(s)) < 0) |
302 | return r; | |
e06c73cc | 303 | |
cba6e062 | 304 | r = unit_exec_context_defaults(u, &s->exec_context); |
e06c73cc LP |
305 | if (r < 0) |
306 | return r; | |
07b0b134 ML |
307 | } |
308 | ||
309 | return swap_verify(s); | |
310 | } | |
311 | ||
6b1dc2bd | 312 | static int swap_add_one( |
4e85aff4 LP |
313 | Manager *m, |
314 | const char *what, | |
e04aad61 | 315 | const char *what_proc_swaps, |
4e85aff4 LP |
316 | int priority, |
317 | bool noauto, | |
173a8d04 | 318 | bool nofail, |
e04aad61 LP |
319 | bool set_flags) { |
320 | ||
4e85aff4 | 321 | Unit *u = NULL; |
e04aad61 | 322 | char *e = NULL, *wp = NULL; |
2c7c6144 | 323 | bool delete = false; |
07b0b134 | 324 | int r; |
4e85aff4 | 325 | SwapParameters *p; |
6b1dc2bd | 326 | Swap *first; |
4e85aff4 LP |
327 | |
328 | assert(m); | |
329 | assert(what); | |
6b1dc2bd | 330 | assert(what_proc_swaps); |
07b0b134 | 331 | |
7d17cfbc MS |
332 | e = unit_name_from_path(what, ".swap"); |
333 | if (!e) | |
07b0b134 ML |
334 | return -ENOMEM; |
335 | ||
e04aad61 LP |
336 | u = manager_get_unit(m, e); |
337 | ||
6b1dc2bd | 338 | if (u && |
e04aad61 LP |
339 | SWAP(u)->from_proc_swaps && |
340 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
341 | return -EEXIST; | |
4e85aff4 LP |
342 | |
343 | if (!u) { | |
07b0b134 ML |
344 | delete = true; |
345 | ||
7d17cfbc MS |
346 | u = unit_new(m, sizeof(Swap)); |
347 | if (!u) { | |
07b0b134 ML |
348 | free(e); |
349 | return -ENOMEM; | |
350 | } | |
e04aad61 | 351 | |
7d17cfbc MS |
352 | r = unit_add_name(u, e); |
353 | if (r < 0) | |
e04aad61 LP |
354 | goto fail; |
355 | ||
7d17cfbc MS |
356 | SWAP(u)->what = strdup(what); |
357 | if (!SWAP(u)->what) { | |
e04aad61 LP |
358 | r = -ENOMEM; |
359 | goto fail; | |
360 | } | |
361 | ||
362 | unit_add_to_load_queue(u); | |
4e85aff4 LP |
363 | } else |
364 | delete = false; | |
07b0b134 | 365 | |
6b1dc2bd | 366 | p = &SWAP(u)->parameters_proc_swaps; |
07b0b134 | 367 | |
6b1dc2bd LP |
368 | if (!p->what) { |
369 | if (!(wp = strdup(what_proc_swaps))) { | |
370 | r = -ENOMEM; | |
371 | goto fail; | |
372 | } | |
e04aad61 | 373 | |
6b1dc2bd LP |
374 | if (!m->swaps_by_proc_swaps) |
375 | if (!(m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func))) { | |
e04aad61 LP |
376 | r = -ENOMEM; |
377 | goto fail; | |
378 | } | |
379 | ||
6b1dc2bd LP |
380 | free(p->what); |
381 | p->what = wp; | |
e04aad61 | 382 | |
6b1dc2bd LP |
383 | first = hashmap_get(m->swaps_by_proc_swaps, wp); |
384 | LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); | |
e04aad61 | 385 | |
6b1dc2bd | 386 | if ((r = hashmap_replace(m->swaps_by_proc_swaps, wp, first)) < 0) |
e04aad61 | 387 | goto fail; |
6b1dc2bd | 388 | } |
e04aad61 | 389 | |
6b1dc2bd LP |
390 | if (set_flags) { |
391 | SWAP(u)->is_active = true; | |
392 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
4e85aff4 | 393 | } |
07b0b134 | 394 | |
6b1dc2bd LP |
395 | SWAP(u)->from_proc_swaps = true; |
396 | ||
4e85aff4 LP |
397 | p->priority = priority; |
398 | p->noauto = noauto; | |
173a8d04 | 399 | p->nofail = nofail; |
07b0b134 | 400 | |
4e85aff4 | 401 | unit_add_to_dbus_queue(u); |
07b0b134 | 402 | |
4e85aff4 | 403 | free(e); |
07b0b134 ML |
404 | |
405 | return 0; | |
406 | ||
407 | fail: | |
e04aad61 LP |
408 | log_warning("Failed to load swap unit: %s", strerror(-r)); |
409 | ||
410 | free(wp); | |
4e85aff4 LP |
411 | free(e); |
412 | ||
413 | if (delete && u) | |
07b0b134 ML |
414 | unit_free(u); |
415 | ||
4e85aff4 | 416 | return r; |
07b0b134 ML |
417 | } |
418 | ||
e04aad61 LP |
419 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { |
420 | struct stat st; | |
421 | int r = 0, k; | |
422 | ||
423 | assert(m); | |
424 | ||
425 | if (stat(device, &st) >= 0 && S_ISBLK(st.st_mode)) { | |
426 | struct udev_device *d; | |
427 | const char *dn; | |
428 | struct udev_list_entry *item = NULL, *first = NULL; | |
429 | ||
430 | /* So this is a proper swap device. Create swap units | |
431 | * for all names this swap device is known under */ | |
432 | ||
433 | if (!(d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev))) | |
434 | return -ENOMEM; | |
435 | ||
8d8e9456 LP |
436 | dn = udev_device_get_devnode(d); |
437 | if (dn) | |
438 | r = swap_add_one(m, dn, device, prio, false, false, set_flags); | |
e04aad61 LP |
439 | |
440 | /* Add additional units for all symlinks */ | |
441 | first = udev_device_get_devlinks_list_entry(d); | |
442 | udev_list_entry_foreach(item, first) { | |
443 | const char *p; | |
444 | ||
445 | /* Don't bother with the /dev/block links */ | |
446 | p = udev_list_entry_get_name(item); | |
447 | ||
448 | if (path_startswith(p, "/dev/block/")) | |
449 | continue; | |
450 | ||
451 | if (stat(p, &st) >= 0) | |
452 | if ((!S_ISBLK(st.st_mode)) || st.st_rdev != udev_device_get_devnum(d)) | |
453 | continue; | |
454 | ||
8d8e9456 LP |
455 | k = swap_add_one(m, p, device, prio, false, false, set_flags); |
456 | if (k < 0) | |
e04aad61 LP |
457 | r = k; |
458 | } | |
459 | ||
460 | udev_device_unref(d); | |
461 | } | |
462 | ||
8d8e9456 LP |
463 | k = swap_add_one(m, device, device, prio, false, false, set_flags); |
464 | if (k < 0) | |
e04aad61 LP |
465 | r = k; |
466 | ||
467 | return r; | |
468 | } | |
469 | ||
07b0b134 ML |
470 | static void swap_set_state(Swap *s, SwapState state) { |
471 | SwapState old_state; | |
e04aad61 | 472 | |
07b0b134 ML |
473 | assert(s); |
474 | ||
475 | old_state = s->state; | |
476 | s->state = state; | |
477 | ||
e04aad61 LP |
478 | if (state != SWAP_ACTIVATING && |
479 | state != SWAP_ACTIVATING_SIGTERM && | |
480 | state != SWAP_ACTIVATING_SIGKILL && | |
481 | state != SWAP_DEACTIVATING && | |
482 | state != SWAP_DEACTIVATING_SIGTERM && | |
483 | state != SWAP_DEACTIVATING_SIGKILL) { | |
484 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
485 | swap_unwatch_control_pid(s); | |
486 | s->control_command = NULL; | |
487 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
488 | } | |
489 | ||
07b0b134 ML |
490 | if (state != old_state) |
491 | log_debug("%s changed %s -> %s", | |
1124fe6f | 492 | UNIT(s)->id, |
07b0b134 ML |
493 | swap_state_to_string(old_state), |
494 | swap_state_to_string(state)); | |
495 | ||
e2f3b44c | 496 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); |
07b0b134 ML |
497 | } |
498 | ||
499 | static int swap_coldplug(Unit *u) { | |
500 | Swap *s = SWAP(u); | |
501 | SwapState new_state = SWAP_DEAD; | |
e04aad61 | 502 | int r; |
07b0b134 ML |
503 | |
504 | assert(s); | |
505 | assert(s->state == SWAP_DEAD); | |
506 | ||
507 | if (s->deserialized_state != s->state) | |
508 | new_state = s->deserialized_state; | |
4e85aff4 | 509 | else if (s->from_proc_swaps) |
07b0b134 ML |
510 | new_state = SWAP_ACTIVE; |
511 | ||
e04aad61 LP |
512 | if (new_state != s->state) { |
513 | ||
514 | if (new_state == SWAP_ACTIVATING || | |
515 | new_state == SWAP_ACTIVATING_SIGTERM || | |
516 | new_state == SWAP_ACTIVATING_SIGKILL || | |
517 | new_state == SWAP_DEACTIVATING || | |
518 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
519 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
520 | ||
521 | if (s->control_pid <= 0) | |
522 | return -EBADMSG; | |
523 | ||
524 | if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0) | |
525 | return r; | |
526 | ||
527 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
528 | return r; | |
529 | } | |
530 | ||
4e85aff4 | 531 | swap_set_state(s, new_state); |
e04aad61 | 532 | } |
07b0b134 ML |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
538 | Swap *s = SWAP(u); | |
4e85aff4 | 539 | SwapParameters *p; |
07b0b134 ML |
540 | |
541 | assert(s); | |
4e85aff4 LP |
542 | assert(f); |
543 | ||
544 | if (s->from_proc_swaps) | |
545 | p = &s->parameters_proc_swaps; | |
546 | else if (s->from_fragment) | |
547 | p = &s->parameters_fragment; | |
b6bfc7bb LP |
548 | else |
549 | p = NULL; | |
07b0b134 ML |
550 | |
551 | fprintf(f, | |
4e85aff4 | 552 | "%sSwap State: %s\n" |
e1770af8 | 553 | "%sResult: %s\n" |
07b0b134 | 554 | "%sWhat: %s\n" |
4e85aff4 LP |
555 | "%sFrom /proc/swaps: %s\n" |
556 | "%sFrom fragment: %s\n", | |
07b0b134 | 557 | prefix, swap_state_to_string(s->state), |
e1770af8 | 558 | prefix, swap_result_to_string(s->result), |
07b0b134 | 559 | prefix, s->what, |
4e85aff4 LP |
560 | prefix, yes_no(s->from_proc_swaps), |
561 | prefix, yes_no(s->from_fragment)); | |
e04aad61 | 562 | |
b6bfc7bb LP |
563 | if (p) |
564 | fprintf(f, | |
565 | "%sPriority: %i\n" | |
566 | "%sNoAuto: %s\n" | |
567 | "%sNoFail: %s\n", | |
568 | prefix, p->priority, | |
569 | prefix, yes_no(p->noauto), | |
570 | prefix, yes_no(p->nofail)); | |
571 | ||
e04aad61 LP |
572 | if (s->control_pid > 0) |
573 | fprintf(f, | |
574 | "%sControl PID: %lu\n", | |
575 | prefix, (unsigned long) s->control_pid); | |
576 | ||
577 | exec_context_dump(&s->exec_context, f, prefix); | |
4819ff03 | 578 | kill_context_dump(&s->kill_context, f, prefix); |
e04aad61 LP |
579 | } |
580 | ||
581 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
582 | pid_t pid; | |
583 | int r; | |
584 | ||
585 | assert(s); | |
586 | assert(c); | |
587 | assert(_pid); | |
588 | ||
589 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
590 | goto fail; | |
591 | ||
592 | if ((r = exec_spawn(c, | |
593 | NULL, | |
594 | &s->exec_context, | |
595 | NULL, 0, | |
1124fe6f | 596 | UNIT(s)->manager->environment, |
e04aad61 LP |
597 | true, |
598 | true, | |
599 | true, | |
1124fe6f MS |
600 | UNIT(s)->manager->confirm_spawn, |
601 | UNIT(s)->cgroup_bondings, | |
602 | UNIT(s)->cgroup_attributes, | |
ecedd90f | 603 | NULL, |
62bca2c6 | 604 | UNIT(s)->id, |
f2b68789 | 605 | NULL, |
e04aad61 LP |
606 | &pid)) < 0) |
607 | goto fail; | |
608 | ||
609 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) | |
610 | /* FIXME: we need to do something here */ | |
611 | goto fail; | |
612 | ||
613 | *_pid = pid; | |
614 | ||
615 | return 0; | |
616 | ||
617 | fail: | |
618 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
619 | ||
620 | return r; | |
07b0b134 ML |
621 | } |
622 | ||
e1770af8 | 623 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
624 | assert(s); |
625 | ||
e1770af8 LP |
626 | if (f != SWAP_SUCCESS) |
627 | s->result = f; | |
e04aad61 | 628 | |
e1770af8 | 629 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
630 | } |
631 | ||
e1770af8 | 632 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
633 | assert(s); |
634 | ||
e1770af8 LP |
635 | if (f != SWAP_SUCCESS) |
636 | s->result = f; | |
e04aad61 LP |
637 | |
638 | swap_set_state(s, SWAP_ACTIVE); | |
639 | } | |
640 | ||
e1770af8 | 641 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 | 642 | int r; |
e04aad61 LP |
643 | Set *pid_set = NULL; |
644 | bool wait_for_exit = false; | |
07b0b134 ML |
645 | |
646 | assert(s); | |
e04aad61 | 647 | |
e1770af8 LP |
648 | if (f != SWAP_SUCCESS) |
649 | s->result = f; | |
e04aad61 | 650 | |
4819ff03 | 651 | if (s->kill_context.kill_mode != KILL_NONE) { |
e04aad61 | 652 | int sig = (state == SWAP_ACTIVATING_SIGTERM || |
4819ff03 | 653 | state == SWAP_DEACTIVATING_SIGTERM) ? s->kill_context.kill_signal : SIGKILL; |
e04aad61 LP |
654 | |
655 | if (s->control_pid > 0) { | |
cd25cce9 | 656 | if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH) |
e04aad61 LP |
657 | |
658 | log_warning("Failed to kill control process %li: %m", (long) s->control_pid); | |
659 | else | |
660 | wait_for_exit = true; | |
661 | } | |
662 | ||
4819ff03 | 663 | if (s->kill_context.kill_mode == KILL_CONTROL_GROUP) { |
e04aad61 LP |
664 | |
665 | if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) { | |
666 | r = -ENOMEM; | |
667 | goto fail; | |
668 | } | |
669 | ||
670 | /* Exclude the control pid from being killed via the cgroup */ | |
671 | if (s->control_pid > 0) | |
672 | if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) | |
673 | goto fail; | |
674 | ||
88f3e0c9 | 675 | r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, false, pid_set, NULL); |
ecedd90f | 676 | if (r < 0) { |
e04aad61 LP |
677 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) |
678 | log_warning("Failed to kill control group: %s", strerror(-r)); | |
679 | } else if (r > 0) | |
680 | wait_for_exit = true; | |
681 | ||
682 | set_free(pid_set); | |
da19d5c1 | 683 | pid_set = NULL; |
e04aad61 LP |
684 | } |
685 | } | |
686 | ||
687 | if (wait_for_exit) { | |
688 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
689 | goto fail; | |
690 | ||
691 | swap_set_state(s, state); | |
692 | } else | |
e1770af8 | 693 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
694 | |
695 | return; | |
696 | ||
697 | fail: | |
1124fe6f | 698 | log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); |
e04aad61 | 699 | |
e1770af8 | 700 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
701 | |
702 | if (pid_set) | |
703 | set_free(pid_set); | |
704 | } | |
705 | ||
706 | static void swap_enter_activating(Swap *s) { | |
707 | int r, priority; | |
708 | ||
709 | assert(s); | |
710 | ||
711 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
712 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 713 | |
4e85aff4 LP |
714 | if (s->from_fragment) |
715 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
716 | else |
717 | priority = -1; | |
4e85aff4 | 718 | |
e04aad61 LP |
719 | if (priority >= 0) { |
720 | char p[LINE_MAX]; | |
07b0b134 | 721 | |
e04aad61 LP |
722 | snprintf(p, sizeof(p), "%i", priority); |
723 | char_array_0(p); | |
07b0b134 | 724 | |
e04aad61 LP |
725 | r = exec_command_set( |
726 | s->control_command, | |
727 | "/sbin/swapon", | |
728 | "-p", | |
729 | p, | |
730 | s->what, | |
731 | NULL); | |
732 | } else | |
733 | r = exec_command_set( | |
734 | s->control_command, | |
735 | "/sbin/swapon", | |
736 | s->what, | |
737 | NULL); | |
738 | ||
739 | if (r < 0) | |
740 | goto fail; | |
741 | ||
742 | swap_unwatch_control_pid(s); | |
743 | ||
744 | if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0) | |
745 | goto fail; | |
746 | ||
747 | swap_set_state(s, SWAP_ACTIVATING); | |
748 | ||
749 | return; | |
750 | ||
751 | fail: | |
1124fe6f | 752 | log_warning("%s failed to run 'swapon' task: %s", UNIT(s)->id, strerror(-r)); |
e1770af8 | 753 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
754 | } |
755 | ||
e1770af8 | 756 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
757 | int r; |
758 | ||
759 | assert(s); | |
760 | ||
e04aad61 LP |
761 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
762 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
763 | ||
764 | if ((r = exec_command_set( | |
765 | s->control_command, | |
766 | "/sbin/swapoff", | |
767 | s->what, | |
768 | NULL)) < 0) | |
769 | goto fail; | |
770 | ||
771 | swap_unwatch_control_pid(s); | |
772 | ||
773 | if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0) | |
774 | goto fail; | |
775 | ||
776 | swap_set_state(s, SWAP_DEACTIVATING); | |
777 | ||
778 | return; | |
779 | ||
780 | fail: | |
1124fe6f | 781 | log_warning("%s failed to run 'swapoff' task: %s", UNIT(s)->id, strerror(-r)); |
e1770af8 | 782 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
783 | } |
784 | ||
785 | static int swap_start(Unit *u) { | |
786 | Swap *s = SWAP(u); | |
787 | ||
788 | assert(s); | |
789 | ||
790 | /* We cannot fulfill this request right now, try again later | |
791 | * please! */ | |
792 | ||
793 | if (s->state == SWAP_DEACTIVATING || | |
794 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
795 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
796 | s->state == SWAP_ACTIVATING_SIGTERM || | |
797 | s->state == SWAP_ACTIVATING_SIGKILL) | |
798 | return -EAGAIN; | |
799 | ||
800 | if (s->state == SWAP_ACTIVATING) | |
801 | return 0; | |
802 | ||
803 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
804 | ||
a5c3034f LP |
805 | if (detect_container(NULL) > 0) |
806 | return -EPERM; | |
807 | ||
e1770af8 | 808 | s->result = SWAP_SUCCESS; |
e04aad61 | 809 | swap_enter_activating(s); |
07b0b134 ML |
810 | return 0; |
811 | } | |
812 | ||
813 | static int swap_stop(Unit *u) { | |
814 | Swap *s = SWAP(u); | |
07b0b134 ML |
815 | |
816 | assert(s); | |
817 | ||
e04aad61 LP |
818 | if (s->state == SWAP_DEACTIVATING || |
819 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
820 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
821 | s->state == SWAP_ACTIVATING_SIGTERM || | |
822 | s->state == SWAP_ACTIVATING_SIGKILL) | |
823 | return 0; | |
07b0b134 | 824 | |
e04aad61 LP |
825 | assert(s->state == SWAP_ACTIVATING || |
826 | s->state == SWAP_ACTIVE); | |
07b0b134 | 827 | |
a5c3034f LP |
828 | if (detect_container(NULL) > 0) |
829 | return -EPERM; | |
830 | ||
e1770af8 | 831 | swap_enter_deactivating(s); |
07b0b134 ML |
832 | return 0; |
833 | } | |
834 | ||
835 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
836 | Swap *s = SWAP(u); | |
837 | ||
838 | assert(s); | |
839 | assert(f); | |
840 | assert(fds); | |
841 | ||
842 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 843 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
844 | |
845 | if (s->control_pid > 0) | |
846 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
847 | ||
848 | if (s->control_command_id >= 0) | |
849 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 ML |
850 | |
851 | return 0; | |
852 | } | |
853 | ||
854 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
855 | Swap *s = SWAP(u); | |
856 | ||
857 | assert(s); | |
858 | assert(fds); | |
859 | ||
860 | if (streq(key, "state")) { | |
861 | SwapState state; | |
862 | ||
863 | if ((state = swap_state_from_string(value)) < 0) | |
864 | log_debug("Failed to parse state value %s", value); | |
865 | else | |
866 | s->deserialized_state = state; | |
e1770af8 LP |
867 | } else if (streq(key, "result")) { |
868 | SwapResult f; | |
869 | ||
870 | f = swap_result_from_string(value); | |
871 | if (f < 0) | |
872 | log_debug("Failed to parse result value %s", value); | |
873 | else if (f != SWAP_SUCCESS) | |
874 | s->result = f; | |
e04aad61 LP |
875 | } else if (streq(key, "control-pid")) { |
876 | pid_t pid; | |
877 | ||
878 | if (parse_pid(value, &pid) < 0) | |
879 | log_debug("Failed to parse control-pid value %s", value); | |
880 | else | |
881 | s->control_pid = pid; | |
882 | ||
883 | } else if (streq(key, "control-command")) { | |
884 | SwapExecCommand id; | |
885 | ||
886 | if ((id = swap_exec_command_from_string(value)) < 0) | |
887 | log_debug("Failed to parse exec-command value %s", value); | |
888 | else { | |
889 | s->control_command_id = id; | |
890 | s->control_command = s->exec_command + id; | |
891 | } | |
892 | ||
07b0b134 ML |
893 | } else |
894 | log_debug("Unknown serialization key '%s'", key); | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static UnitActiveState swap_active_state(Unit *u) { | |
900 | assert(u); | |
901 | ||
902 | return state_translation_table[SWAP(u)->state]; | |
903 | } | |
904 | ||
905 | static const char *swap_sub_state_to_string(Unit *u) { | |
906 | assert(u); | |
907 | ||
908 | return swap_state_to_string(SWAP(u)->state); | |
909 | } | |
910 | ||
911 | static bool swap_check_gc(Unit *u) { | |
912 | Swap *s = SWAP(u); | |
913 | ||
914 | assert(s); | |
915 | ||
6b1dc2bd | 916 | return s->from_proc_swaps; |
07b0b134 ML |
917 | } |
918 | ||
e04aad61 LP |
919 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
920 | Swap *s = SWAP(u); | |
e1770af8 | 921 | SwapResult f; |
e04aad61 LP |
922 | |
923 | assert(s); | |
924 | assert(pid >= 0); | |
925 | ||
926 | if (pid != s->control_pid) | |
927 | return; | |
928 | ||
929 | s->control_pid = 0; | |
930 | ||
96342de6 | 931 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
932 | f = SWAP_SUCCESS; |
933 | else if (code == CLD_EXITED) | |
934 | f = SWAP_FAILURE_EXIT_CODE; | |
935 | else if (code == CLD_KILLED) | |
936 | f = SWAP_FAILURE_SIGNAL; | |
937 | else if (code == CLD_DUMPED) | |
938 | f = SWAP_FAILURE_CORE_DUMP; | |
939 | else | |
940 | assert_not_reached("Unknown code"); | |
941 | ||
942 | if (f != SWAP_SUCCESS) | |
943 | s->result = f; | |
e04aad61 LP |
944 | |
945 | if (s->control_command) { | |
6ea832a2 | 946 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 947 | |
e04aad61 LP |
948 | s->control_command = NULL; |
949 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
950 | } | |
951 | ||
e1770af8 | 952 | log_full(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
ac155bb8 | 953 | "%s swap process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status); |
e04aad61 LP |
954 | |
955 | switch (s->state) { | |
956 | ||
957 | case SWAP_ACTIVATING: | |
958 | case SWAP_ACTIVATING_SIGTERM: | |
959 | case SWAP_ACTIVATING_SIGKILL: | |
960 | ||
e1770af8 LP |
961 | if (f == SWAP_SUCCESS) |
962 | swap_enter_active(s, f); | |
e04aad61 | 963 | else |
e1770af8 | 964 | swap_enter_dead(s, f); |
e04aad61 LP |
965 | break; |
966 | ||
967 | case SWAP_DEACTIVATING: | |
968 | case SWAP_DEACTIVATING_SIGKILL: | |
969 | case SWAP_DEACTIVATING_SIGTERM: | |
970 | ||
e1770af8 LP |
971 | if (f == SWAP_SUCCESS) |
972 | swap_enter_dead(s, f); | |
e04aad61 | 973 | else |
e1770af8 | 974 | swap_enter_dead(s, f); |
e04aad61 LP |
975 | break; |
976 | ||
977 | default: | |
978 | assert_not_reached("Uh, control process died at wrong time."); | |
979 | } | |
980 | ||
981 | /* Notify clients about changed exit status */ | |
982 | unit_add_to_dbus_queue(u); | |
983 | ||
984 | /* Request a reload of /proc/swaps, so that following units | |
985 | * can follow our state change */ | |
ac155bb8 | 986 | u->manager->request_reload = true; |
e04aad61 LP |
987 | } |
988 | ||
989 | static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) { | |
990 | Swap *s = SWAP(u); | |
991 | ||
992 | assert(s); | |
993 | assert(elapsed == 1); | |
994 | assert(w == &s->timer_watch); | |
995 | ||
996 | switch (s->state) { | |
997 | ||
998 | case SWAP_ACTIVATING: | |
ac155bb8 | 999 | log_warning("%s activation timed out. Stopping.", u->id); |
e1770af8 | 1000 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1001 | break; |
1002 | ||
1003 | case SWAP_DEACTIVATING: | |
ac155bb8 | 1004 | log_warning("%s deactivation timed out. Stopping.", u->id); |
e1770af8 | 1005 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1006 | break; |
1007 | ||
1008 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1009 | if (s->kill_context.send_sigkill) { |
ac155bb8 | 1010 | log_warning("%s activation timed out. Killing.", u->id); |
e1770af8 | 1011 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1012 | } else { |
ac155bb8 | 1013 | log_warning("%s activation timed out. Skipping SIGKILL. Ignoring.", u->id); |
e1770af8 | 1014 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1015 | } |
e04aad61 LP |
1016 | break; |
1017 | ||
1018 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1019 | if (s->kill_context.send_sigkill) { |
ac155bb8 | 1020 | log_warning("%s deactivation timed out. Killing.", u->id); |
e1770af8 | 1021 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1022 | } else { |
ac155bb8 | 1023 | log_warning("%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id); |
e1770af8 | 1024 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1025 | } |
e04aad61 LP |
1026 | break; |
1027 | ||
1028 | case SWAP_ACTIVATING_SIGKILL: | |
1029 | case SWAP_DEACTIVATING_SIGKILL: | |
ac155bb8 | 1030 | log_warning("%s swap process still around after SIGKILL. Ignoring.", u->id); |
e1770af8 | 1031 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1032 | break; |
1033 | ||
1034 | default: | |
1035 | assert_not_reached("Timeout at wrong time."); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1040 | unsigned i; | |
1041 | int r = 0; | |
1042 | ||
1043 | assert(m); | |
1044 | ||
07b0b134 | 1045 | rewind(m->proc_swaps); |
bab45044 | 1046 | |
4e85aff4 | 1047 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1048 | |
e04aad61 | 1049 | for (i = 1;; i++) { |
07b0b134 ML |
1050 | char *dev = NULL, *d; |
1051 | int prio = 0, k; | |
1052 | ||
4e85aff4 | 1053 | if ((k = fscanf(m->proc_swaps, |
e04aad61 LP |
1054 | "%ms " /* device/file */ |
1055 | "%*s " /* type of swap */ | |
1056 | "%*s " /* swap size */ | |
1057 | "%*s " /* used */ | |
4e85aff4 LP |
1058 | "%i\n", /* priority */ |
1059 | &dev, &prio)) != 2) { | |
07b0b134 | 1060 | |
07b0b134 | 1061 | if (k == EOF) |
4e85aff4 | 1062 | break; |
07b0b134 | 1063 | |
e04aad61 | 1064 | log_warning("Failed to parse /proc/swaps:%u.", i); |
07b0b134 | 1065 | free(dev); |
e04aad61 | 1066 | continue; |
07b0b134 | 1067 | } |
07b0b134 | 1068 | |
4e85aff4 | 1069 | d = cunescape(dev); |
07b0b134 | 1070 | free(dev); |
4e85aff4 LP |
1071 | |
1072 | if (!d) | |
1073 | return -ENOMEM; | |
1074 | ||
e04aad61 | 1075 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 ML |
1076 | free(d); |
1077 | ||
1078 | if (k < 0) | |
e04aad61 | 1079 | r = k; |
07b0b134 ML |
1080 | } |
1081 | ||
e04aad61 LP |
1082 | return r; |
1083 | } | |
1084 | ||
1085 | int swap_dispatch_reload(Manager *m) { | |
4e434314 | 1086 | /* This function should go as soon as the kernel properly notifies us */ |
e04aad61 LP |
1087 | |
1088 | if (_likely_(!m->request_reload)) | |
1089 | return 0; | |
1090 | ||
1091 | m->request_reload = false; | |
1092 | ||
4e434314 LP |
1093 | return swap_fd_event(m, EPOLLPRI); |
1094 | } | |
1095 | ||
1096 | int swap_fd_event(Manager *m, int events) { | |
595ed347 | 1097 | Unit *u; |
4e434314 LP |
1098 | int r; |
1099 | ||
1100 | assert(m); | |
1101 | assert(events & EPOLLPRI); | |
1102 | ||
bd40a2d8 | 1103 | if ((r = swap_load_proc_swaps(m, true)) < 0) { |
e04aad61 LP |
1104 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1105 | ||
1106 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1107 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1108 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1109 | |
1110 | swap->is_active = swap->just_activated = false; | |
1111 | } | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | manager_dispatch_load_queue(m); | |
1117 | ||
595ed347 MS |
1118 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1119 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1120 | |
1121 | if (!swap->is_active) { | |
1122 | /* This has just been deactivated */ | |
1123 | ||
1124 | swap->from_proc_swaps = false; | |
1125 | swap_unset_proc_swaps(swap); | |
1126 | ||
1127 | switch (swap->state) { | |
1128 | ||
1129 | case SWAP_ACTIVE: | |
e1770af8 | 1130 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1131 | break; |
1132 | ||
1133 | default: | |
1134 | swap_set_state(swap, swap->state); | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | } else if (swap->just_activated) { | |
1139 | ||
1140 | /* New swap entry */ | |
1141 | ||
1142 | switch (swap->state) { | |
1143 | ||
1144 | case SWAP_DEAD: | |
1145 | case SWAP_FAILED: | |
e1770af8 | 1146 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1147 | break; |
1148 | ||
1149 | default: | |
1150 | /* Nothing really changed, but let's | |
1151 | * issue an notification call | |
1152 | * nonetheless, in case somebody is | |
1153 | * waiting for this. */ | |
1154 | swap_set_state(swap, swap->state); | |
1155 | break; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | /* Reset the flags for later calls */ | |
1160 | swap->is_active = swap->just_activated = false; | |
1161 | } | |
1162 | ||
1163 | return 1; | |
1164 | } | |
1165 | ||
1166 | static Unit *swap_following(Unit *u) { | |
1167 | Swap *s = SWAP(u); | |
1168 | Swap *other, *first = NULL; | |
1169 | ||
1170 | assert(s); | |
1171 | ||
1172 | if (streq_ptr(s->what, s->parameters_proc_swaps.what)) | |
1173 | return NULL; | |
1174 | ||
1175 | /* Make everybody follow the unit that's named after the swap | |
1176 | * device in the kernel */ | |
1177 | ||
1178 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1179 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1180 | return UNIT(other); | |
1181 | ||
1182 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) { | |
1183 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1184 | return UNIT(other); | |
1185 | ||
1186 | first = other; | |
1187 | } | |
1188 | ||
1189 | return UNIT(first); | |
07b0b134 ML |
1190 | } |
1191 | ||
6210e7fc LP |
1192 | static int swap_following_set(Unit *u, Set **_set) { |
1193 | Swap *s = SWAP(u); | |
1194 | Swap *other; | |
1195 | Set *set; | |
1196 | int r; | |
1197 | ||
1198 | assert(s); | |
1199 | assert(_set); | |
1200 | ||
1201 | if (LIST_JUST_US(same_proc_swaps, s)) { | |
1202 | *_set = NULL; | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | if (!(set = set_new(NULL, NULL))) | |
1207 | return -ENOMEM; | |
1208 | ||
1209 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1210 | if ((r = set_put(set, other)) < 0) | |
1211 | goto fail; | |
1212 | ||
1213 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) | |
1214 | if ((r = set_put(set, other)) < 0) | |
1215 | goto fail; | |
1216 | ||
1217 | *_set = set; | |
1218 | return 1; | |
1219 | ||
1220 | fail: | |
1221 | set_free(set); | |
1222 | return r; | |
1223 | } | |
1224 | ||
07b0b134 ML |
1225 | static void swap_shutdown(Manager *m) { |
1226 | assert(m); | |
1227 | ||
1228 | if (m->proc_swaps) { | |
1229 | fclose(m->proc_swaps); | |
1230 | m->proc_swaps = NULL; | |
1231 | } | |
e04aad61 LP |
1232 | |
1233 | hashmap_free(m->swaps_by_proc_swaps); | |
1234 | m->swaps_by_proc_swaps = NULL; | |
07b0b134 ML |
1235 | } |
1236 | ||
07b0b134 ML |
1237 | static int swap_enumerate(Manager *m) { |
1238 | int r; | |
4e434314 | 1239 | struct epoll_event ev; |
07b0b134 ML |
1240 | assert(m); |
1241 | ||
4e434314 | 1242 | if (!m->proc_swaps) { |
4e85aff4 | 1243 | if (!(m->proc_swaps = fopen("/proc/swaps", "re"))) |
3f858732 | 1244 | return (errno == ENOENT) ? 0 : -errno; |
07b0b134 | 1245 | |
4e434314 LP |
1246 | m->swap_watch.type = WATCH_SWAP; |
1247 | m->swap_watch.fd = fileno(m->proc_swaps); | |
1248 | ||
1249 | zero(ev); | |
1250 | ev.events = EPOLLPRI; | |
1251 | ev.data.ptr = &m->swap_watch; | |
1252 | ||
1253 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0) | |
1254 | return -errno; | |
1255 | } | |
1256 | ||
e04aad61 | 1257 | if ((r = swap_load_proc_swaps(m, false)) < 0) |
07b0b134 ML |
1258 | swap_shutdown(m); |
1259 | ||
1260 | return r; | |
1261 | } | |
1262 | ||
fdf20a31 | 1263 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1264 | Swap *s = SWAP(u); |
1265 | ||
1266 | assert(s); | |
1267 | ||
fdf20a31 | 1268 | if (s->state == SWAP_FAILED) |
5632e374 | 1269 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1270 | |
e1770af8 | 1271 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1272 | } |
1273 | ||
c74f17d9 | 1274 | static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) { |
8a0867d6 LP |
1275 | Swap *s = SWAP(u); |
1276 | int r = 0; | |
1277 | Set *pid_set = NULL; | |
1278 | ||
1279 | assert(s); | |
1280 | ||
1281 | if (who == KILL_MAIN) { | |
1282 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Swap units have no main processes"); | |
a17204af | 1283 | return -ESRCH; |
8a0867d6 LP |
1284 | } |
1285 | ||
1286 | if (s->control_pid <= 0 && who == KILL_CONTROL) { | |
1287 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); | |
a17204af | 1288 | return -ESRCH; |
8a0867d6 LP |
1289 | } |
1290 | ||
3611581e LP |
1291 | if (who == KILL_CONTROL || who == KILL_ALL) |
1292 | if (s->control_pid > 0) | |
1293 | if (kill(s->control_pid, signo) < 0) | |
1294 | r = -errno; | |
8a0867d6 | 1295 | |
c74f17d9 | 1296 | if (who == KILL_ALL) { |
8a0867d6 LP |
1297 | int q; |
1298 | ||
c74f17d9 LP |
1299 | pid_set = set_new(trivial_hash_func, trivial_compare_func); |
1300 | if (!pid_set) | |
8a0867d6 LP |
1301 | return -ENOMEM; |
1302 | ||
1303 | /* Exclude the control pid from being killed via the cgroup */ | |
c74f17d9 LP |
1304 | if (s->control_pid > 0) { |
1305 | q = set_put(pid_set, LONG_TO_PTR(s->control_pid)); | |
1306 | if (q < 0) { | |
8a0867d6 LP |
1307 | r = q; |
1308 | goto finish; | |
1309 | } | |
c74f17d9 | 1310 | } |
8a0867d6 | 1311 | |
88f3e0c9 | 1312 | q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, false, pid_set, NULL); |
c74f17d9 LP |
1313 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
1314 | r = q; | |
8a0867d6 LP |
1315 | } |
1316 | ||
1317 | finish: | |
1318 | if (pid_set) | |
1319 | set_free(pid_set); | |
1320 | ||
1321 | return r; | |
1322 | } | |
1323 | ||
5632e374 LP |
1324 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1325 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1326 | [SWAP_ACTIVATING] = "activating", |
5632e374 | 1327 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1328 | [SWAP_DEACTIVATING] = "deactivating", |
1329 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1330 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1331 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1332 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1333 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1334 | }; |
1335 | ||
1336 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1337 | ||
e04aad61 LP |
1338 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1339 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1340 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1341 | }; | |
1342 | ||
1343 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1344 | ||
e1770af8 LP |
1345 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1346 | [SWAP_SUCCESS] = "success", | |
1347 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1348 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1349 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1350 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1351 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1352 | }; | |
1353 | ||
1354 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1355 | ||
07b0b134 | 1356 | const UnitVTable swap_vtable = { |
7d17cfbc | 1357 | .object_size = sizeof(Swap), |
3ef63c31 LP |
1358 | .exec_context_offset = offsetof(Swap, exec_context), |
1359 | ||
f975e971 LP |
1360 | .sections = |
1361 | "Unit\0" | |
1362 | "Swap\0" | |
1363 | "Install\0", | |
07b0b134 | 1364 | |
e04aad61 | 1365 | .no_alias = true, |
07b0b134 ML |
1366 | .no_instances = true, |
1367 | ||
4e85aff4 | 1368 | .init = swap_init, |
07b0b134 | 1369 | .load = swap_load, |
6e620bec | 1370 | .done = swap_done, |
07b0b134 ML |
1371 | |
1372 | .coldplug = swap_coldplug, | |
1373 | ||
1374 | .dump = swap_dump, | |
1375 | ||
1376 | .start = swap_start, | |
1377 | .stop = swap_stop, | |
1378 | ||
8a0867d6 LP |
1379 | .kill = swap_kill, |
1380 | ||
07b0b134 ML |
1381 | .serialize = swap_serialize, |
1382 | .deserialize_item = swap_deserialize_item, | |
1383 | ||
1384 | .active_state = swap_active_state, | |
1385 | .sub_state_to_string = swap_sub_state_to_string, | |
1386 | ||
1387 | .check_gc = swap_check_gc, | |
1388 | ||
e04aad61 LP |
1389 | .sigchld_event = swap_sigchld_event, |
1390 | .timer_event = swap_timer_event, | |
1391 | ||
1392 | .reset_failed = swap_reset_failed, | |
1393 | ||
c4e2ceae | 1394 | .bus_interface = "org.freedesktop.systemd1.Swap", |
07b0b134 | 1395 | .bus_message_handler = bus_swap_message_handler, |
c4e2ceae | 1396 | .bus_invalidating_properties = bus_swap_invalidating_properties, |
07b0b134 | 1397 | |
e04aad61 | 1398 | .following = swap_following, |
6210e7fc | 1399 | .following_set = swap_following_set, |
5632e374 | 1400 | |
6e620bec | 1401 | .enumerate = swap_enumerate, |
c6918296 MS |
1402 | .shutdown = swap_shutdown, |
1403 | ||
1404 | .status_message_formats = { | |
1405 | .starting_stopping = { | |
1406 | [0] = "Activating swap %s...", | |
1407 | [1] = "Deactivating swap %s...", | |
1408 | }, | |
1409 | .finished_start_job = { | |
1410 | [JOB_DONE] = "Activated swap %s.", | |
1411 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1412 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1413 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1414 | }, | |
1415 | .finished_stop_job = { | |
1416 | [JOB_DONE] = "Deactivated swap %s.", | |
1417 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1418 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1419 | }, | |
1420 | }, | |
07b0b134 | 1421 | }; |