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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" |
5bcb0f2b | 43 | #include "udev-util.h" |
07b0b134 ML |
44 | |
45 | static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { | |
46 | [SWAP_DEAD] = UNIT_INACTIVE, | |
e04aad61 | 47 | [SWAP_ACTIVATING] = UNIT_ACTIVATING, |
5bcb0f2b | 48 | [SWAP_ACTIVATING_DONE] = UNIT_ACTIVE, |
07b0b134 | 49 | [SWAP_ACTIVE] = UNIT_ACTIVE, |
e04aad61 LP |
50 | [SWAP_DEACTIVATING] = UNIT_DEACTIVATING, |
51 | [SWAP_ACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
52 | [SWAP_ACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
53 | [SWAP_DEACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
54 | [SWAP_DEACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 55 | [SWAP_FAILED] = UNIT_FAILED |
07b0b134 ML |
56 | }; |
57 | ||
718db961 LP |
58 | static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); |
59 | static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); | |
60 | ||
e04aad61 | 61 | static void swap_unset_proc_swaps(Swap *s) { |
9670d583 LP |
62 | assert(s); |
63 | ||
64 | if (!s->from_proc_swaps) | |
65 | return; | |
66 | ||
67 | free(s->parameters_proc_swaps.what); | |
68 | s->parameters_proc_swaps.what = NULL; | |
69 | ||
70 | s->from_proc_swaps = false; | |
71 | } | |
72 | ||
73 | static int swap_set_devnode(Swap *s, const char *devnode) { | |
df326b84 | 74 | Hashmap *swaps; |
5bcb0f2b | 75 | Swap *first; |
9670d583 | 76 | int r; |
e04aad61 LP |
77 | |
78 | assert(s); | |
79 | ||
9670d583 LP |
80 | r = hashmap_ensure_allocated(&UNIT(s)->manager->swaps_by_devnode, string_hash_func, string_compare_func); |
81 | if (r < 0) | |
82 | return r; | |
e04aad61 | 83 | |
9670d583 | 84 | swaps = UNIT(s)->manager->swaps_by_devnode; |
e04aad61 | 85 | |
9670d583 LP |
86 | if (s->devnode) { |
87 | first = hashmap_get(swaps, s->devnode); | |
e04aad61 | 88 | |
9670d583 LP |
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); | |
5bcb0f2b | 94 | |
9670d583 LP |
95 | free(s->devnode); |
96 | s->devnode = NULL; | |
97 | } | |
98 | ||
99 | if (devnode) { | |
100 | s->devnode = strdup(devnode); | |
101 | if (!s->devnode) | |
102 | return -ENOMEM; | |
103 | ||
104 | first = hashmap_get(swaps, s->devnode); | |
105 | LIST_PREPEND(same_devnode, first, s); | |
106 | ||
107 | return hashmap_replace(swaps, first->devnode, first); | |
108 | } | |
109 | ||
110 | return 0; | |
e04aad61 LP |
111 | } |
112 | ||
f6cebb3b | 113 | static void swap_init(Unit *u) { |
6e620bec LP |
114 | Swap *s = SWAP(u); |
115 | ||
116 | assert(s); | |
1124fe6f | 117 | assert(UNIT(s)->load_state == UNIT_STUB); |
6e620bec | 118 | |
1f19a534 | 119 | s->timeout_usec = u->manager->default_timeout_start_usec; |
e04aad61 | 120 | |
ac155bb8 MS |
121 | s->exec_context.std_output = u->manager->default_std_output; |
122 | s->exec_context.std_error = u->manager->default_std_error; | |
085afe36 | 123 | |
6b1dc2bd | 124 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; |
e04aad61 | 125 | |
e1770af8 | 126 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; |
c8f4d764 | 127 | |
5bcb0f2b | 128 | u->ignore_on_isolate = true; |
e04aad61 LP |
129 | } |
130 | ||
131 | static void swap_unwatch_control_pid(Swap *s) { | |
132 | assert(s); | |
133 | ||
134 | if (s->control_pid <= 0) | |
135 | return; | |
136 | ||
137 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
138 | s->control_pid = 0; | |
6e620bec LP |
139 | } |
140 | ||
4e85aff4 LP |
141 | static void swap_done(Unit *u) { |
142 | Swap *s = SWAP(u); | |
07b0b134 | 143 | |
4e85aff4 | 144 | assert(s); |
07b0b134 | 145 | |
e04aad61 | 146 | swap_unset_proc_swaps(s); |
9670d583 | 147 | swap_set_devnode(s, NULL); |
e04aad61 | 148 | |
4e85aff4 | 149 | free(s->what); |
e04aad61 LP |
150 | s->what = NULL; |
151 | ||
4e85aff4 | 152 | free(s->parameters_fragment.what); |
6b1dc2bd | 153 | s->parameters_fragment.what = NULL; |
e04aad61 | 154 | |
613b411c | 155 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); |
e04aad61 LP |
156 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); |
157 | s->control_command = NULL; | |
158 | ||
159 | swap_unwatch_control_pid(s); | |
160 | ||
718db961 LP |
161 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
162 | } | |
163 | ||
164 | static int swap_arm_timer(Swap *s) { | |
165 | int r; | |
166 | ||
167 | assert(s); | |
168 | ||
169 | if (s->timeout_usec <= 0) { | |
170 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | if (s->timer_event_source) { | |
175 | r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec); | |
176 | if (r < 0) | |
177 | return r; | |
178 | ||
179 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
180 | } | |
181 | ||
6a0f1f6d LP |
182 | return sd_event_add_time( |
183 | UNIT(s)->manager->event, | |
184 | &s->timer_event_source, | |
185 | CLOCK_MONOTONIC, | |
186 | now(CLOCK_MONOTONIC) + s->timeout_usec, 0, | |
187 | swap_dispatch_timer, s); | |
07b0b134 ML |
188 | } |
189 | ||
173a8d04 LP |
190 | static int swap_add_device_links(Swap *s) { |
191 | SwapParameters *p; | |
192 | ||
193 | assert(s); | |
194 | ||
195 | if (!s->what) | |
196 | return 0; | |
197 | ||
198 | if (s->from_fragment) | |
199 | p = &s->parameters_fragment; | |
173a8d04 LP |
200 | else |
201 | return 0; | |
202 | ||
cfcfd4ae | 203 | if (is_device_path(s->what)) |
5bcb0f2b | 204 | return unit_add_node_link(UNIT(s), s->what, !p->noauto && UNIT(s)->manager->running_as == SYSTEMD_SYSTEM); |
cfcfd4ae LP |
205 | else |
206 | /* File based swap devices need to be ordered after | |
2b93b027 | 207 | * systemd-remount-fs.service, since they might need a |
cfcfd4ae | 208 | * writable file system. */ |
2b93b027 | 209 | return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); |
173a8d04 LP |
210 | } |
211 | ||
2edd4434 | 212 | static int swap_add_default_dependencies(Swap *s) { |
64347fc2 | 213 | bool nofail = false, noauto = false; |
2edd4434 LP |
214 | int r; |
215 | ||
216 | assert(s); | |
217 | ||
67445f4e | 218 | if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM) |
6b1dc2bd | 219 | return 0; |
2edd4434 | 220 | |
c0387ebf LP |
221 | if (detect_container(NULL) > 0) |
222 | return 0; | |
223 | ||
6b1dc2bd LP |
224 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); |
225 | if (r < 0) | |
226 | return r; | |
2edd4434 | 227 | |
64347fc2 TG |
228 | if (s->from_fragment) { |
229 | SwapParameters *p = &s->parameters_fragment; | |
230 | ||
231 | nofail = p->nofail; | |
232 | noauto = p->noauto; | |
233 | } | |
234 | ||
235 | if (!noauto) { | |
4e82fe52 | 236 | if (nofail) |
5bcb0f2b | 237 | r = unit_add_dependency_by_name_inverse(UNIT(s), UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true); |
4e82fe52 | 238 | else |
5bcb0f2b | 239 | r = unit_add_two_dependencies_by_name_inverse(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true); |
64347fc2 TG |
240 | if (r < 0) |
241 | return r; | |
242 | } | |
243 | ||
2edd4434 LP |
244 | return 0; |
245 | } | |
246 | ||
4e85aff4 LP |
247 | static int swap_verify(Swap *s) { |
248 | bool b; | |
7fd1b19b | 249 | _cleanup_free_ char *e = NULL; |
4e85aff4 | 250 | |
1124fe6f | 251 | if (UNIT(s)->load_state != UNIT_LOADED) |
5bcb0f2b | 252 | return 0; |
4e85aff4 | 253 | |
170ca19e | 254 | e = unit_name_from_path(s->what, ".swap"); |
5bcb0f2b | 255 | if (!e) |
170ca19e | 256 | return log_oom(); |
4e85aff4 LP |
257 | |
258 | b = unit_has_name(UNIT(s), e); | |
4e85aff4 | 259 | if (!b) { |
5bcb0f2b | 260 | log_error_unit(UNIT(s)->id, "%s: Value of \"What\" and unit name do not match, not loading.", UNIT(s)->id); |
4e85aff4 LP |
261 | return -EINVAL; |
262 | } | |
263 | ||
4819ff03 | 264 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
5bcb0f2b | 265 | log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", UNIT(s)->id); |
e04aad61 LP |
266 | return -EINVAL; |
267 | } | |
268 | ||
4e85aff4 LP |
269 | return 0; |
270 | } | |
271 | ||
9670d583 LP |
272 | static int swap_load_devnode(Swap *s) { |
273 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
274 | struct stat st; | |
275 | const char *p; | |
276 | ||
277 | assert(s); | |
278 | ||
279 | if (stat(s->what, &st) < 0 || !S_ISBLK(st.st_mode)) | |
280 | return 0; | |
281 | ||
282 | d = udev_device_new_from_devnum(UNIT(s)->manager->udev, 'b', st.st_rdev); | |
283 | if (!d) | |
284 | return 0; | |
285 | ||
286 | p = udev_device_get_devnode(d); | |
287 | if (!p) | |
288 | return 0; | |
289 | ||
290 | return swap_set_devnode(s, p); | |
291 | } | |
292 | ||
07b0b134 ML |
293 | static int swap_load(Unit *u) { |
294 | int r; | |
295 | Swap *s = SWAP(u); | |
296 | ||
297 | assert(s); | |
ac155bb8 | 298 | assert(u->load_state == UNIT_STUB); |
07b0b134 ML |
299 | |
300 | /* Load a .swap file */ | |
646134dc ZJS |
301 | r = unit_load_fragment_and_dropin_optional(u); |
302 | if (r < 0) | |
07b0b134 ML |
303 | return r; |
304 | ||
ac155bb8 | 305 | if (u->load_state == UNIT_LOADED) { |
4e85aff4 | 306 | |
1124fe6f | 307 | if (UNIT(s)->fragment_path) |
4e85aff4 LP |
308 | s->from_fragment = true; |
309 | ||
310 | if (!s->what) { | |
311 | if (s->parameters_fragment.what) | |
312 | s->what = strdup(s->parameters_fragment.what); | |
4e85aff4 LP |
313 | else if (s->parameters_proc_swaps.what) |
314 | s->what = strdup(s->parameters_proc_swaps.what); | |
315 | else | |
ac155bb8 | 316 | s->what = unit_name_to_path(u->id); |
4e85aff4 LP |
317 | |
318 | if (!s->what) | |
07b0b134 | 319 | return -ENOMEM; |
4e85aff4 | 320 | } |
07b0b134 ML |
321 | |
322 | path_kill_slashes(s->what); | |
323 | ||
5bcb0f2b LP |
324 | if (!UNIT(s)->description) { |
325 | r = unit_set_description(u, s->what); | |
326 | if (r < 0) | |
4e85aff4 | 327 | return r; |
5bcb0f2b | 328 | } |
4e85aff4 | 329 | |
a57f7e2c | 330 | r = unit_require_mounts_for(UNIT(s), s->what); |
646134dc | 331 | if (r < 0) |
07b0b134 ML |
332 | return r; |
333 | ||
a57f7e2c | 334 | r = swap_add_device_links(s); |
646134dc | 335 | if (r < 0) |
6e2ef85b | 336 | return r; |
07b0b134 | 337 | |
9670d583 LP |
338 | r = swap_load_devnode(s); |
339 | if (r < 0) | |
340 | return r; | |
341 | ||
598459ce LP |
342 | r = unit_patch_contexts(u); |
343 | if (r < 0) | |
344 | return r; | |
345 | ||
346 | r = unit_add_exec_dependencies(u, &s->exec_context); | |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | r = unit_add_default_slice(u, &s->cgroup_context); | |
a016b922 LP |
351 | if (r < 0) |
352 | return r; | |
353 | ||
646134dc ZJS |
354 | if (UNIT(s)->default_dependencies) { |
355 | r = swap_add_default_dependencies(s); | |
356 | if (r < 0) | |
2edd4434 | 357 | return r; |
646134dc | 358 | } |
07b0b134 ML |
359 | } |
360 | ||
361 | return swap_verify(s); | |
362 | } | |
363 | ||
6b1dc2bd | 364 | static int swap_add_one( |
4e85aff4 LP |
365 | Manager *m, |
366 | const char *what, | |
e04aad61 | 367 | const char *what_proc_swaps, |
4e85aff4 LP |
368 | int priority, |
369 | bool noauto, | |
173a8d04 | 370 | bool nofail, |
e04aad61 LP |
371 | bool set_flags) { |
372 | ||
7fd1b19b | 373 | _cleanup_free_ char *e = NULL; |
2c7c6144 | 374 | bool delete = false; |
5bcb0f2b | 375 | Unit *u = NULL; |
07b0b134 | 376 | int r; |
4e85aff4 LP |
377 | SwapParameters *p; |
378 | ||
379 | assert(m); | |
380 | assert(what); | |
6b1dc2bd | 381 | assert(what_proc_swaps); |
07b0b134 | 382 | |
7d17cfbc MS |
383 | e = unit_name_from_path(what, ".swap"); |
384 | if (!e) | |
170ca19e | 385 | return log_oom(); |
07b0b134 | 386 | |
e04aad61 LP |
387 | u = manager_get_unit(m, e); |
388 | ||
6b1dc2bd | 389 | if (u && |
e04aad61 LP |
390 | SWAP(u)->from_proc_swaps && |
391 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
392 | return -EEXIST; | |
4e85aff4 LP |
393 | |
394 | if (!u) { | |
07b0b134 ML |
395 | delete = true; |
396 | ||
7d17cfbc | 397 | u = unit_new(m, sizeof(Swap)); |
170ca19e ZJS |
398 | if (!u) |
399 | return log_oom(); | |
e04aad61 | 400 | |
7d17cfbc MS |
401 | r = unit_add_name(u, e); |
402 | if (r < 0) | |
e04aad61 LP |
403 | goto fail; |
404 | ||
7d17cfbc MS |
405 | SWAP(u)->what = strdup(what); |
406 | if (!SWAP(u)->what) { | |
646134dc | 407 | r = log_oom(); |
e04aad61 LP |
408 | goto fail; |
409 | } | |
410 | ||
411 | unit_add_to_load_queue(u); | |
4e85aff4 LP |
412 | } else |
413 | delete = false; | |
07b0b134 | 414 | |
6b1dc2bd | 415 | p = &SWAP(u)->parameters_proc_swaps; |
07b0b134 | 416 | |
6b1dc2bd | 417 | if (!p->what) { |
5bcb0f2b LP |
418 | p->what = strdup(what_proc_swaps); |
419 | if (!p->what) { | |
420 | r = -ENOMEM; | |
6b1dc2bd LP |
421 | goto fail; |
422 | } | |
6b1dc2bd | 423 | } |
e04aad61 | 424 | |
6b1dc2bd LP |
425 | if (set_flags) { |
426 | SWAP(u)->is_active = true; | |
427 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
4e85aff4 | 428 | } |
07b0b134 | 429 | |
6b1dc2bd LP |
430 | SWAP(u)->from_proc_swaps = true; |
431 | ||
4e85aff4 LP |
432 | p->priority = priority; |
433 | p->noauto = noauto; | |
173a8d04 | 434 | p->nofail = nofail; |
07b0b134 | 435 | |
4e85aff4 | 436 | unit_add_to_dbus_queue(u); |
07b0b134 | 437 | |
07b0b134 ML |
438 | return 0; |
439 | ||
440 | fail: | |
66870f90 | 441 | log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); |
e04aad61 | 442 | |
4e85aff4 | 443 | if (delete && u) |
07b0b134 ML |
444 | unit_free(u); |
445 | ||
4e85aff4 | 446 | return r; |
07b0b134 ML |
447 | } |
448 | ||
e04aad61 | 449 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { |
5bcb0f2b LP |
450 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; |
451 | struct udev_list_entry *item = NULL, *first = NULL; | |
452 | const char *dn; | |
e04aad61 | 453 | struct stat st; |
5bcb0f2b | 454 | int r; |
e04aad61 LP |
455 | |
456 | assert(m); | |
457 | ||
5bcb0f2b LP |
458 | r = swap_add_one(m, device, device, prio, false, false, set_flags); |
459 | if (r < 0) | |
460 | return r; | |
e04aad61 | 461 | |
5bcb0f2b LP |
462 | /* If this is a block device, then let's add duplicates for |
463 | * all other names of this block device */ | |
464 | if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode)) | |
465 | return 0; | |
e04aad61 | 466 | |
5bcb0f2b LP |
467 | d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); |
468 | if (!d) | |
469 | return 0; | |
e04aad61 | 470 | |
5bcb0f2b LP |
471 | /* Add the main device node */ |
472 | dn = udev_device_get_devnode(d); | |
473 | if (dn && !streq(dn, device)) | |
474 | swap_add_one(m, dn, device, prio, false, false, set_flags); | |
e04aad61 | 475 | |
5bcb0f2b LP |
476 | /* Add additional units for all symlinks */ |
477 | first = udev_device_get_devlinks_list_entry(d); | |
478 | udev_list_entry_foreach(item, first) { | |
479 | const char *p; | |
e04aad61 | 480 | |
5bcb0f2b LP |
481 | /* Don't bother with the /dev/block links */ |
482 | p = udev_list_entry_get_name(item); | |
e04aad61 | 483 | |
5bcb0f2b LP |
484 | if (streq(p, device)) |
485 | continue; | |
e04aad61 | 486 | |
5bcb0f2b LP |
487 | if (path_startswith(p, "/dev/block/")) |
488 | continue; | |
e04aad61 | 489 | |
5bcb0f2b LP |
490 | if (stat(p, &st) >= 0) |
491 | if (!S_ISBLK(st.st_mode) || | |
492 | st.st_rdev != udev_device_get_devnum(d)) | |
493 | continue; | |
e04aad61 | 494 | |
5bcb0f2b | 495 | swap_add_one(m, p, device, prio, false, false, set_flags); |
e04aad61 LP |
496 | } |
497 | ||
e04aad61 LP |
498 | return r; |
499 | } | |
500 | ||
07b0b134 ML |
501 | static void swap_set_state(Swap *s, SwapState state) { |
502 | SwapState old_state; | |
e04aad61 | 503 | |
07b0b134 ML |
504 | assert(s); |
505 | ||
506 | old_state = s->state; | |
507 | s->state = state; | |
508 | ||
e04aad61 LP |
509 | if (state != SWAP_ACTIVATING && |
510 | state != SWAP_ACTIVATING_SIGTERM && | |
511 | state != SWAP_ACTIVATING_SIGKILL && | |
5bcb0f2b | 512 | state != SWAP_ACTIVATING_DONE && |
e04aad61 LP |
513 | state != SWAP_DEACTIVATING && |
514 | state != SWAP_DEACTIVATING_SIGTERM && | |
515 | state != SWAP_DEACTIVATING_SIGKILL) { | |
718db961 | 516 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
517 | swap_unwatch_control_pid(s); |
518 | s->control_command = NULL; | |
519 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
520 | } | |
521 | ||
07b0b134 | 522 | if (state != old_state) |
66870f90 ZJS |
523 | log_debug_unit(UNIT(s)->id, |
524 | "%s changed %s -> %s", | |
525 | UNIT(s)->id, | |
526 | swap_state_to_string(old_state), | |
527 | swap_state_to_string(state)); | |
07b0b134 | 528 | |
5bcb0f2b | 529 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); |
07b0b134 ML |
530 | } |
531 | ||
532 | static int swap_coldplug(Unit *u) { | |
533 | Swap *s = SWAP(u); | |
534 | SwapState new_state = SWAP_DEAD; | |
e04aad61 | 535 | int r; |
07b0b134 ML |
536 | |
537 | assert(s); | |
538 | assert(s->state == SWAP_DEAD); | |
539 | ||
540 | if (s->deserialized_state != s->state) | |
541 | new_state = s->deserialized_state; | |
4e85aff4 | 542 | else if (s->from_proc_swaps) |
07b0b134 ML |
543 | new_state = SWAP_ACTIVE; |
544 | ||
5bcb0f2b LP |
545 | if (new_state == s->state) |
546 | return 0; | |
e04aad61 | 547 | |
5bcb0f2b LP |
548 | if (new_state == SWAP_ACTIVATING || |
549 | new_state == SWAP_ACTIVATING_SIGTERM || | |
550 | new_state == SWAP_ACTIVATING_SIGKILL || | |
551 | new_state == SWAP_ACTIVATING_DONE || | |
552 | new_state == SWAP_DEACTIVATING || | |
553 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
554 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
e04aad61 | 555 | |
5bcb0f2b LP |
556 | if (s->control_pid <= 0) |
557 | return -EBADMSG; | |
e04aad61 | 558 | |
5bcb0f2b LP |
559 | r = unit_watch_pid(UNIT(s), s->control_pid); |
560 | if (r < 0) | |
561 | return r; | |
e04aad61 | 562 | |
5bcb0f2b LP |
563 | r = swap_arm_timer(s); |
564 | if (r < 0) | |
565 | return r; | |
e04aad61 | 566 | } |
07b0b134 | 567 | |
5bcb0f2b | 568 | swap_set_state(s, new_state); |
07b0b134 ML |
569 | return 0; |
570 | } | |
571 | ||
572 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
573 | Swap *s = SWAP(u); | |
4e85aff4 | 574 | SwapParameters *p; |
07b0b134 ML |
575 | |
576 | assert(s); | |
4e85aff4 LP |
577 | assert(f); |
578 | ||
579 | if (s->from_proc_swaps) | |
580 | p = &s->parameters_proc_swaps; | |
581 | else if (s->from_fragment) | |
582 | p = &s->parameters_fragment; | |
b6bfc7bb LP |
583 | else |
584 | p = NULL; | |
07b0b134 ML |
585 | |
586 | fprintf(f, | |
4e85aff4 | 587 | "%sSwap State: %s\n" |
e1770af8 | 588 | "%sResult: %s\n" |
07b0b134 | 589 | "%sWhat: %s\n" |
4e85aff4 LP |
590 | "%sFrom /proc/swaps: %s\n" |
591 | "%sFrom fragment: %s\n", | |
07b0b134 | 592 | prefix, swap_state_to_string(s->state), |
e1770af8 | 593 | prefix, swap_result_to_string(s->result), |
07b0b134 | 594 | prefix, s->what, |
4e85aff4 LP |
595 | prefix, yes_no(s->from_proc_swaps), |
596 | prefix, yes_no(s->from_fragment)); | |
e04aad61 | 597 | |
9670d583 LP |
598 | if (s->devnode) |
599 | fprintf(f, "%sDevice Node: %s\n", prefix, s->devnode); | |
600 | ||
b6bfc7bb LP |
601 | if (p) |
602 | fprintf(f, | |
603 | "%sPriority: %i\n" | |
604 | "%sNoAuto: %s\n" | |
605 | "%sNoFail: %s\n", | |
606 | prefix, p->priority, | |
607 | prefix, yes_no(p->noauto), | |
608 | prefix, yes_no(p->nofail)); | |
609 | ||
e04aad61 LP |
610 | if (s->control_pid > 0) |
611 | fprintf(f, | |
de0671ee ZJS |
612 | "%sControl PID: "PID_FMT"\n", |
613 | prefix, s->control_pid); | |
e04aad61 LP |
614 | |
615 | exec_context_dump(&s->exec_context, f, prefix); | |
4819ff03 | 616 | kill_context_dump(&s->kill_context, f, prefix); |
e04aad61 LP |
617 | } |
618 | ||
619 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
620 | pid_t pid; | |
621 | int r; | |
622 | ||
623 | assert(s); | |
624 | assert(c); | |
625 | assert(_pid); | |
626 | ||
4ad49000 LP |
627 | unit_realize_cgroup(UNIT(s)); |
628 | ||
613b411c LP |
629 | r = unit_setup_exec_runtime(UNIT(s)); |
630 | if (r < 0) | |
631 | goto fail; | |
632 | ||
718db961 | 633 | r = swap_arm_timer(s); |
646134dc | 634 | if (r < 0) |
e04aad61 LP |
635 | goto fail; |
636 | ||
646134dc ZJS |
637 | r = exec_spawn(c, |
638 | NULL, | |
639 | &s->exec_context, | |
640 | NULL, 0, | |
641 | UNIT(s)->manager->environment, | |
642 | true, | |
643 | true, | |
644 | true, | |
645 | UNIT(s)->manager->confirm_spawn, | |
13b84ec7 | 646 | UNIT(s)->manager->cgroup_supported, |
4ad49000 | 647 | UNIT(s)->cgroup_path, |
e66cf1a3 | 648 | manager_get_runtime_prefix(UNIT(s)->manager), |
646134dc | 649 | UNIT(s)->id, |
09812eb7 | 650 | 0, |
646134dc | 651 | NULL, |
613b411c | 652 | s->exec_runtime, |
646134dc ZJS |
653 | &pid); |
654 | if (r < 0) | |
e04aad61 LP |
655 | goto fail; |
656 | ||
646134dc ZJS |
657 | r = unit_watch_pid(UNIT(s), pid); |
658 | if (r < 0) | |
e04aad61 LP |
659 | /* FIXME: we need to do something here */ |
660 | goto fail; | |
661 | ||
662 | *_pid = pid; | |
663 | ||
664 | return 0; | |
665 | ||
666 | fail: | |
718db961 | 667 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
668 | |
669 | return r; | |
07b0b134 ML |
670 | } |
671 | ||
e1770af8 | 672 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
673 | assert(s); |
674 | ||
e1770af8 LP |
675 | if (f != SWAP_SUCCESS) |
676 | s->result = f; | |
e04aad61 | 677 | |
613b411c LP |
678 | exec_runtime_destroy(s->exec_runtime); |
679 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
680 | ||
e66cf1a3 LP |
681 | exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); |
682 | ||
e1770af8 | 683 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
684 | } |
685 | ||
e1770af8 | 686 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
687 | assert(s); |
688 | ||
e1770af8 LP |
689 | if (f != SWAP_SUCCESS) |
690 | s->result = f; | |
e04aad61 LP |
691 | |
692 | swap_set_state(s, SWAP_ACTIVE); | |
693 | } | |
694 | ||
e1770af8 | 695 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 ML |
696 | int r; |
697 | ||
698 | assert(s); | |
e04aad61 | 699 | |
e1770af8 LP |
700 | if (f != SWAP_SUCCESS) |
701 | s->result = f; | |
e04aad61 | 702 | |
cd2086fe LP |
703 | r = unit_kill_context( |
704 | UNIT(s), | |
705 | &s->kill_context, | |
706 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
707 | -1, | |
708 | s->control_pid, | |
709 | false); | |
710 | if (r < 0) | |
711 | goto fail; | |
e04aad61 | 712 | |
cd2086fe | 713 | if (r > 0) { |
718db961 | 714 | r = swap_arm_timer(s); |
646134dc | 715 | if (r < 0) |
e04aad61 LP |
716 | goto fail; |
717 | ||
718 | swap_set_state(s, state); | |
ac84d1fb LP |
719 | } else if (state == SWAP_ACTIVATING_SIGTERM) |
720 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_SUCCESS); | |
721 | else if (state == SWAP_DEACTIVATING_SIGTERM) | |
722 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_SUCCESS); | |
723 | else | |
e1770af8 | 724 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
725 | |
726 | return; | |
727 | ||
728 | fail: | |
66870f90 ZJS |
729 | log_warning_unit(UNIT(s)->id, |
730 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
e04aad61 | 731 | |
e1770af8 | 732 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
733 | } |
734 | ||
735 | static void swap_enter_activating(Swap *s) { | |
736 | int r, priority; | |
737 | ||
738 | assert(s); | |
739 | ||
740 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
741 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 742 | |
4e85aff4 LP |
743 | if (s->from_fragment) |
744 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
745 | else |
746 | priority = -1; | |
4e85aff4 | 747 | |
e04aad61 | 748 | if (priority >= 0) { |
5bcb0f2b | 749 | char p[DECIMAL_STR_MAX(int)]; |
07b0b134 | 750 | |
5bcb0f2b | 751 | sprintf(p, "%i", priority); |
07b0b134 | 752 | |
e04aad61 LP |
753 | r = exec_command_set( |
754 | s->control_command, | |
755 | "/sbin/swapon", | |
756 | "-p", | |
757 | p, | |
758 | s->what, | |
759 | NULL); | |
760 | } else | |
761 | r = exec_command_set( | |
762 | s->control_command, | |
763 | "/sbin/swapon", | |
764 | s->what, | |
765 | NULL); | |
766 | ||
767 | if (r < 0) | |
768 | goto fail; | |
769 | ||
770 | swap_unwatch_control_pid(s); | |
771 | ||
646134dc ZJS |
772 | r = swap_spawn(s, s->control_command, &s->control_pid); |
773 | if (r < 0) | |
e04aad61 LP |
774 | goto fail; |
775 | ||
776 | swap_set_state(s, SWAP_ACTIVATING); | |
777 | ||
778 | return; | |
779 | ||
780 | fail: | |
66870f90 ZJS |
781 | log_warning_unit(UNIT(s)->id, |
782 | "%s failed to run 'swapon' task: %s", | |
783 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 784 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
785 | } |
786 | ||
e1770af8 | 787 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
788 | int r; |
789 | ||
790 | assert(s); | |
791 | ||
e04aad61 LP |
792 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
793 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
794 | ||
646134dc | 795 | r = exec_command_set(s->control_command, |
e04aad61 LP |
796 | "/sbin/swapoff", |
797 | s->what, | |
646134dc ZJS |
798 | NULL); |
799 | if (r < 0) | |
e04aad61 LP |
800 | goto fail; |
801 | ||
802 | swap_unwatch_control_pid(s); | |
803 | ||
646134dc ZJS |
804 | r = swap_spawn(s, s->control_command, &s->control_pid); |
805 | if (r < 0) | |
e04aad61 LP |
806 | goto fail; |
807 | ||
808 | swap_set_state(s, SWAP_DEACTIVATING); | |
809 | ||
810 | return; | |
811 | ||
812 | fail: | |
66870f90 ZJS |
813 | log_warning_unit(UNIT(s)->id, |
814 | "%s failed to run 'swapoff' task: %s", | |
815 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 816 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
817 | } |
818 | ||
819 | static int swap_start(Unit *u) { | |
820 | Swap *s = SWAP(u); | |
821 | ||
822 | assert(s); | |
823 | ||
824 | /* We cannot fulfill this request right now, try again later | |
825 | * please! */ | |
826 | ||
827 | if (s->state == SWAP_DEACTIVATING || | |
828 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
829 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
830 | s->state == SWAP_ACTIVATING_SIGTERM || | |
831 | s->state == SWAP_ACTIVATING_SIGKILL) | |
832 | return -EAGAIN; | |
833 | ||
834 | if (s->state == SWAP_ACTIVATING) | |
835 | return 0; | |
836 | ||
837 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
838 | ||
a5c3034f LP |
839 | if (detect_container(NULL) > 0) |
840 | return -EPERM; | |
841 | ||
e1770af8 | 842 | s->result = SWAP_SUCCESS; |
e04aad61 | 843 | swap_enter_activating(s); |
07b0b134 ML |
844 | return 0; |
845 | } | |
846 | ||
847 | static int swap_stop(Unit *u) { | |
848 | Swap *s = SWAP(u); | |
07b0b134 ML |
849 | |
850 | assert(s); | |
851 | ||
e04aad61 LP |
852 | if (s->state == SWAP_DEACTIVATING || |
853 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
854 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
855 | s->state == SWAP_ACTIVATING_SIGTERM || | |
856 | s->state == SWAP_ACTIVATING_SIGKILL) | |
857 | return 0; | |
07b0b134 | 858 | |
e04aad61 | 859 | assert(s->state == SWAP_ACTIVATING || |
5bcb0f2b | 860 | s->state == SWAP_ACTIVATING_DONE || |
e04aad61 | 861 | s->state == SWAP_ACTIVE); |
07b0b134 | 862 | |
a5c3034f LP |
863 | if (detect_container(NULL) > 0) |
864 | return -EPERM; | |
865 | ||
e1770af8 | 866 | swap_enter_deactivating(s); |
07b0b134 ML |
867 | return 0; |
868 | } | |
869 | ||
870 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
871 | Swap *s = SWAP(u); | |
872 | ||
873 | assert(s); | |
874 | assert(f); | |
875 | assert(fds); | |
876 | ||
877 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 878 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
879 | |
880 | if (s->control_pid > 0) | |
de0671ee | 881 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); |
e04aad61 LP |
882 | |
883 | if (s->control_command_id >= 0) | |
884 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 ML |
885 | |
886 | return 0; | |
887 | } | |
888 | ||
889 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
890 | Swap *s = SWAP(u); | |
891 | ||
892 | assert(s); | |
893 | assert(fds); | |
894 | ||
895 | if (streq(key, "state")) { | |
896 | SwapState state; | |
897 | ||
646134dc ZJS |
898 | state = swap_state_from_string(value); |
899 | if (state < 0) | |
66870f90 | 900 | log_debug_unit(u->id, "Failed to parse state value %s", value); |
07b0b134 ML |
901 | else |
902 | s->deserialized_state = state; | |
e1770af8 LP |
903 | } else if (streq(key, "result")) { |
904 | SwapResult f; | |
905 | ||
906 | f = swap_result_from_string(value); | |
907 | if (f < 0) | |
66870f90 | 908 | log_debug_unit(u->id, "Failed to parse result value %s", value); |
e1770af8 LP |
909 | else if (f != SWAP_SUCCESS) |
910 | s->result = f; | |
e04aad61 LP |
911 | } else if (streq(key, "control-pid")) { |
912 | pid_t pid; | |
913 | ||
914 | if (parse_pid(value, &pid) < 0) | |
66870f90 | 915 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); |
e04aad61 LP |
916 | else |
917 | s->control_pid = pid; | |
918 | ||
919 | } else if (streq(key, "control-command")) { | |
920 | SwapExecCommand id; | |
921 | ||
646134dc ZJS |
922 | id = swap_exec_command_from_string(value); |
923 | if (id < 0) | |
66870f90 | 924 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); |
e04aad61 LP |
925 | else { |
926 | s->control_command_id = id; | |
927 | s->control_command = s->exec_command + id; | |
928 | } | |
07b0b134 | 929 | } else |
66870f90 | 930 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); |
07b0b134 ML |
931 | |
932 | return 0; | |
933 | } | |
934 | ||
44a6b1b6 | 935 | _pure_ static UnitActiveState swap_active_state(Unit *u) { |
07b0b134 ML |
936 | assert(u); |
937 | ||
938 | return state_translation_table[SWAP(u)->state]; | |
939 | } | |
940 | ||
44a6b1b6 | 941 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { |
07b0b134 ML |
942 | assert(u); |
943 | ||
944 | return swap_state_to_string(SWAP(u)->state); | |
945 | } | |
946 | ||
44a6b1b6 | 947 | _pure_ static bool swap_check_gc(Unit *u) { |
07b0b134 ML |
948 | Swap *s = SWAP(u); |
949 | ||
950 | assert(s); | |
951 | ||
6b1dc2bd | 952 | return s->from_proc_swaps; |
07b0b134 ML |
953 | } |
954 | ||
e04aad61 LP |
955 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
956 | Swap *s = SWAP(u); | |
e1770af8 | 957 | SwapResult f; |
e04aad61 LP |
958 | |
959 | assert(s); | |
960 | assert(pid >= 0); | |
961 | ||
962 | if (pid != s->control_pid) | |
963 | return; | |
964 | ||
965 | s->control_pid = 0; | |
966 | ||
96342de6 | 967 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
968 | f = SWAP_SUCCESS; |
969 | else if (code == CLD_EXITED) | |
970 | f = SWAP_FAILURE_EXIT_CODE; | |
971 | else if (code == CLD_KILLED) | |
972 | f = SWAP_FAILURE_SIGNAL; | |
973 | else if (code == CLD_DUMPED) | |
974 | f = SWAP_FAILURE_CORE_DUMP; | |
975 | else | |
976 | assert_not_reached("Unknown code"); | |
977 | ||
978 | if (f != SWAP_SUCCESS) | |
979 | s->result = f; | |
e04aad61 LP |
980 | |
981 | if (s->control_command) { | |
6ea832a2 | 982 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 983 | |
e04aad61 LP |
984 | s->control_command = NULL; |
985 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
986 | } | |
987 | ||
66870f90 ZJS |
988 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
989 | u->id, | |
990 | "%s swap process exited, code=%s status=%i", | |
991 | u->id, sigchld_code_to_string(code), status); | |
e04aad61 LP |
992 | |
993 | switch (s->state) { | |
994 | ||
995 | case SWAP_ACTIVATING: | |
5bcb0f2b | 996 | case SWAP_ACTIVATING_DONE: |
e04aad61 LP |
997 | case SWAP_ACTIVATING_SIGTERM: |
998 | case SWAP_ACTIVATING_SIGKILL: | |
999 | ||
e1770af8 LP |
1000 | if (f == SWAP_SUCCESS) |
1001 | swap_enter_active(s, f); | |
e04aad61 | 1002 | else |
e1770af8 | 1003 | swap_enter_dead(s, f); |
e04aad61 LP |
1004 | break; |
1005 | ||
1006 | case SWAP_DEACTIVATING: | |
1007 | case SWAP_DEACTIVATING_SIGKILL: | |
1008 | case SWAP_DEACTIVATING_SIGTERM: | |
1009 | ||
7bb01eff | 1010 | swap_enter_dead(s, f); |
e04aad61 LP |
1011 | break; |
1012 | ||
1013 | default: | |
1014 | assert_not_reached("Uh, control process died at wrong time."); | |
1015 | } | |
1016 | ||
1017 | /* Notify clients about changed exit status */ | |
1018 | unit_add_to_dbus_queue(u); | |
e04aad61 LP |
1019 | } |
1020 | ||
718db961 LP |
1021 | static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1022 | Swap *s = SWAP(userdata); | |
e04aad61 LP |
1023 | |
1024 | assert(s); | |
718db961 | 1025 | assert(s->timer_event_source == source); |
e04aad61 LP |
1026 | |
1027 | switch (s->state) { | |
1028 | ||
1029 | case SWAP_ACTIVATING: | |
5bcb0f2b | 1030 | case SWAP_ACTIVATING_DONE: |
718db961 | 1031 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1032 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1033 | break; |
1034 | ||
1035 | case SWAP_DEACTIVATING: | |
718db961 | 1036 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1037 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1038 | break; |
1039 | ||
1040 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1041 | if (s->kill_context.send_sigkill) { |
718db961 | 1042 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1043 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1044 | } else { |
718db961 | 1045 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1046 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1047 | } |
e04aad61 LP |
1048 | break; |
1049 | ||
1050 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1051 | if (s->kill_context.send_sigkill) { |
718db961 | 1052 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1053 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1054 | } else { |
718db961 | 1055 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1056 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1057 | } |
e04aad61 LP |
1058 | break; |
1059 | ||
1060 | case SWAP_ACTIVATING_SIGKILL: | |
1061 | case SWAP_DEACTIVATING_SIGKILL: | |
718db961 | 1062 | log_warning_unit(UNIT(s)->id, "%s swap process still around after SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1063 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1064 | break; |
1065 | ||
1066 | default: | |
1067 | assert_not_reached("Timeout at wrong time."); | |
1068 | } | |
718db961 LP |
1069 | |
1070 | return 0; | |
e04aad61 LP |
1071 | } |
1072 | ||
1073 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1074 | unsigned i; | |
1075 | int r = 0; | |
1076 | ||
1077 | assert(m); | |
1078 | ||
07b0b134 | 1079 | rewind(m->proc_swaps); |
bab45044 | 1080 | |
4e85aff4 | 1081 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1082 | |
e04aad61 | 1083 | for (i = 1;; i++) { |
9fb3675e | 1084 | _cleanup_free_ char *dev = NULL, *d = NULL; |
07b0b134 ML |
1085 | int prio = 0, k; |
1086 | ||
646134dc ZJS |
1087 | k = fscanf(m->proc_swaps, |
1088 | "%ms " /* device/file */ | |
1089 | "%*s " /* type of swap */ | |
1090 | "%*s " /* swap size */ | |
1091 | "%*s " /* used */ | |
1092 | "%i\n", /* priority */ | |
1093 | &dev, &prio); | |
1094 | if (k != 2) { | |
07b0b134 | 1095 | if (k == EOF) |
4e85aff4 | 1096 | break; |
07b0b134 | 1097 | |
646134dc | 1098 | log_warning("Failed to parse /proc/swaps:%u", i); |
e04aad61 | 1099 | continue; |
07b0b134 | 1100 | } |
07b0b134 | 1101 | |
4e85aff4 | 1102 | d = cunescape(dev); |
4e85aff4 LP |
1103 | if (!d) |
1104 | return -ENOMEM; | |
1105 | ||
e04aad61 | 1106 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 | 1107 | if (k < 0) |
e04aad61 | 1108 | r = k; |
07b0b134 ML |
1109 | } |
1110 | ||
e04aad61 LP |
1111 | return r; |
1112 | } | |
1113 | ||
718db961 LP |
1114 | static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
1115 | Manager *m = userdata; | |
595ed347 | 1116 | Unit *u; |
4e434314 LP |
1117 | int r; |
1118 | ||
1119 | assert(m); | |
718db961 | 1120 | assert(revents & EPOLLPRI); |
4e434314 | 1121 | |
646134dc ZJS |
1122 | r = swap_load_proc_swaps(m, true); |
1123 | if (r < 0) { | |
e04aad61 LP |
1124 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1125 | ||
1126 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1127 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1128 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1129 | |
1130 | swap->is_active = swap->just_activated = false; | |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | manager_dispatch_load_queue(m); | |
1137 | ||
595ed347 MS |
1138 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1139 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1140 | |
1141 | if (!swap->is_active) { | |
1142 | /* This has just been deactivated */ | |
1143 | ||
e04aad61 LP |
1144 | swap_unset_proc_swaps(swap); |
1145 | ||
1146 | switch (swap->state) { | |
1147 | ||
1148 | case SWAP_ACTIVE: | |
e1770af8 | 1149 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1150 | break; |
1151 | ||
1152 | default: | |
5bcb0f2b | 1153 | /* Fire again */ |
e04aad61 LP |
1154 | swap_set_state(swap, swap->state); |
1155 | break; | |
1156 | } | |
1157 | ||
1158 | } else if (swap->just_activated) { | |
1159 | ||
1160 | /* New swap entry */ | |
1161 | ||
1162 | switch (swap->state) { | |
1163 | ||
1164 | case SWAP_DEAD: | |
1165 | case SWAP_FAILED: | |
e1770af8 | 1166 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1167 | break; |
1168 | ||
5bcb0f2b LP |
1169 | case SWAP_ACTIVATING: |
1170 | swap_set_state(swap, SWAP_ACTIVATING_DONE); | |
1171 | break; | |
1172 | ||
e04aad61 LP |
1173 | default: |
1174 | /* Nothing really changed, but let's | |
1175 | * issue an notification call | |
1176 | * nonetheless, in case somebody is | |
1177 | * waiting for this. */ | |
1178 | swap_set_state(swap, swap->state); | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | /* Reset the flags for later calls */ | |
1184 | swap->is_active = swap->just_activated = false; | |
1185 | } | |
1186 | ||
1187 | return 1; | |
1188 | } | |
1189 | ||
1190 | static Unit *swap_following(Unit *u) { | |
1191 | Swap *s = SWAP(u); | |
1192 | Swap *other, *first = NULL; | |
1193 | ||
1194 | assert(s); | |
1195 | ||
9670d583 | 1196 | if (streq_ptr(s->what, s->devnode)) |
e04aad61 LP |
1197 | return NULL; |
1198 | ||
1199 | /* Make everybody follow the unit that's named after the swap | |
1200 | * device in the kernel */ | |
1201 | ||
9670d583 LP |
1202 | LIST_FOREACH_AFTER(same_devnode, other, s) |
1203 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1204 | return UNIT(other); |
1205 | ||
9670d583 LP |
1206 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
1207 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1208 | return UNIT(other); |
1209 | ||
1210 | first = other; | |
1211 | } | |
1212 | ||
1213 | return UNIT(first); | |
07b0b134 ML |
1214 | } |
1215 | ||
6210e7fc | 1216 | static int swap_following_set(Unit *u, Set **_set) { |
5bcb0f2b | 1217 | Swap *s = SWAP(u), *other; |
6210e7fc LP |
1218 | Set *set; |
1219 | int r; | |
1220 | ||
1221 | assert(s); | |
1222 | assert(_set); | |
1223 | ||
9670d583 | 1224 | if (LIST_JUST_US(same_devnode, s)) { |
6210e7fc LP |
1225 | *_set = NULL; |
1226 | return 0; | |
1227 | } | |
1228 | ||
5bcb0f2b LP |
1229 | set = set_new(NULL, NULL); |
1230 | if (!set) | |
6210e7fc LP |
1231 | return -ENOMEM; |
1232 | ||
9670d583 | 1233 | LIST_FOREACH_AFTER(same_devnode, other, s) { |
5bcb0f2b LP |
1234 | r = set_put(set, other); |
1235 | if (r < 0) | |
6210e7fc | 1236 | goto fail; |
5bcb0f2b | 1237 | } |
6210e7fc | 1238 | |
9670d583 | 1239 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
5bcb0f2b LP |
1240 | r = set_put(set, other); |
1241 | if (r < 0) | |
6210e7fc | 1242 | goto fail; |
5bcb0f2b | 1243 | } |
6210e7fc LP |
1244 | |
1245 | *_set = set; | |
1246 | return 1; | |
1247 | ||
1248 | fail: | |
1249 | set_free(set); | |
1250 | return r; | |
1251 | } | |
1252 | ||
07b0b134 ML |
1253 | static void swap_shutdown(Manager *m) { |
1254 | assert(m); | |
1255 | ||
718db961 LP |
1256 | m->swap_event_source = sd_event_source_unref(m->swap_event_source); |
1257 | ||
07b0b134 ML |
1258 | if (m->proc_swaps) { |
1259 | fclose(m->proc_swaps); | |
1260 | m->proc_swaps = NULL; | |
1261 | } | |
e04aad61 | 1262 | |
9670d583 LP |
1263 | hashmap_free(m->swaps_by_devnode); |
1264 | m->swaps_by_devnode = NULL; | |
07b0b134 ML |
1265 | } |
1266 | ||
07b0b134 ML |
1267 | static int swap_enumerate(Manager *m) { |
1268 | int r; | |
9670d583 | 1269 | |
07b0b134 ML |
1270 | assert(m); |
1271 | ||
4e434314 | 1272 | if (!m->proc_swaps) { |
646134dc ZJS |
1273 | m->proc_swaps = fopen("/proc/swaps", "re"); |
1274 | if (!m->proc_swaps) | |
718db961 | 1275 | return errno == ENOENT ? 0 : -errno; |
4e434314 | 1276 | |
151b9b96 | 1277 | r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m); |
718db961 | 1278 | if (r < 0) |
29083707 LP |
1279 | goto fail; |
1280 | ||
1281 | /* Dispatch this before we dispatch SIGCHLD, so that | |
1282 | * we always get the events from /proc/swaps before | |
1283 | * the SIGCHLD of /sbin/swapon. */ | |
1284 | r = sd_event_source_set_priority(m->swap_event_source, -10); | |
1285 | if (r < 0) | |
718db961 | 1286 | goto fail; |
4e434314 LP |
1287 | } |
1288 | ||
646134dc ZJS |
1289 | r = swap_load_proc_swaps(m, false); |
1290 | if (r < 0) | |
718db961 LP |
1291 | goto fail; |
1292 | ||
1293 | return 0; | |
07b0b134 | 1294 | |
718db961 LP |
1295 | fail: |
1296 | swap_shutdown(m); | |
07b0b134 ML |
1297 | return r; |
1298 | } | |
1299 | ||
9670d583 LP |
1300 | int swap_process_new_device(Manager *m, struct udev_device *dev) { |
1301 | struct udev_list_entry *item = NULL, *first = NULL; | |
1302 | _cleanup_free_ char *e = NULL; | |
1303 | const char *dn; | |
1304 | Swap *s; | |
1305 | int r = 0; | |
1306 | ||
1307 | assert(m); | |
1308 | assert(dev); | |
1309 | ||
1310 | dn = udev_device_get_devnode(dev); | |
1311 | if (!dn) | |
1312 | return 0; | |
1313 | ||
1314 | e = unit_name_from_path(dn, ".swap"); | |
1315 | if (!e) | |
1316 | return -ENOMEM; | |
1317 | ||
1318 | s = hashmap_get(m->units, e); | |
1319 | if (s) | |
1320 | r = swap_set_devnode(s, dn); | |
1321 | ||
1322 | first = udev_device_get_devlinks_list_entry(dev); | |
1323 | udev_list_entry_foreach(item, first) { | |
1324 | _cleanup_free_ char *n = NULL; | |
1325 | ||
1326 | n = unit_name_from_path(udev_list_entry_get_name(item), ".swap"); | |
1327 | if (!n) | |
1328 | return -ENOMEM; | |
1329 | ||
1330 | s = hashmap_get(m->units, n); | |
1331 | if (s) { | |
1332 | int q; | |
1333 | ||
1334 | q = swap_set_devnode(s, dn); | |
1335 | if (q < 0) | |
1336 | r = q; | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | return r; | |
1341 | } | |
1342 | ||
1343 | int swap_process_removed_device(Manager *m, struct udev_device *dev) { | |
9670d583 LP |
1344 | const char *dn; |
1345 | int r = 0; | |
1346 | Swap *s; | |
1347 | ||
1348 | dn = udev_device_get_devnode(dev); | |
1349 | if (!dn) | |
1350 | return 0; | |
1351 | ||
1352 | while ((s = hashmap_get(m->swaps_by_devnode, dn))) { | |
1353 | int q; | |
1354 | ||
1355 | q = swap_set_devnode(s, NULL); | |
1356 | if (q < 0) | |
1357 | r = q; | |
1358 | } | |
1359 | ||
1360 | return r; | |
1361 | } | |
1362 | ||
fdf20a31 | 1363 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1364 | Swap *s = SWAP(u); |
1365 | ||
1366 | assert(s); | |
1367 | ||
fdf20a31 | 1368 | if (s->state == SWAP_FAILED) |
5632e374 | 1369 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1370 | |
e1770af8 | 1371 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1372 | } |
1373 | ||
718db961 | 1374 | static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1375 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); |
8a0867d6 LP |
1376 | } |
1377 | ||
68db7a3b ZJS |
1378 | static int swap_get_timeout(Unit *u, uint64_t *timeout) { |
1379 | Swap *s = SWAP(u); | |
1380 | int r; | |
1381 | ||
1382 | if (!s->timer_event_source) | |
1383 | return 0; | |
1384 | ||
1385 | r = sd_event_source_get_time(s->timer_event_source, timeout); | |
1386 | if (r < 0) | |
1387 | return r; | |
1388 | ||
1389 | return 1; | |
1390 | } | |
1391 | ||
5632e374 LP |
1392 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1393 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1394 | [SWAP_ACTIVATING] = "activating", |
5bcb0f2b | 1395 | [SWAP_ACTIVATING_DONE] = "activating-done", |
5632e374 | 1396 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1397 | [SWAP_DEACTIVATING] = "deactivating", |
1398 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1399 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1400 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1401 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1402 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1403 | }; |
1404 | ||
1405 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1406 | ||
e04aad61 LP |
1407 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1408 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1409 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1410 | }; | |
1411 | ||
1412 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1413 | ||
e1770af8 LP |
1414 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1415 | [SWAP_SUCCESS] = "success", | |
1416 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1417 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1418 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1419 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1420 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1421 | }; | |
1422 | ||
1423 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1424 | ||
07b0b134 | 1425 | const UnitVTable swap_vtable = { |
7d17cfbc | 1426 | .object_size = sizeof(Swap), |
718db961 LP |
1427 | .exec_context_offset = offsetof(Swap, exec_context), |
1428 | .cgroup_context_offset = offsetof(Swap, cgroup_context), | |
1429 | .kill_context_offset = offsetof(Swap, kill_context), | |
613b411c | 1430 | .exec_runtime_offset = offsetof(Swap, exec_runtime), |
3ef63c31 | 1431 | |
f975e971 LP |
1432 | .sections = |
1433 | "Unit\0" | |
1434 | "Swap\0" | |
1435 | "Install\0", | |
4ad49000 | 1436 | .private_section = "Swap", |
71645aca | 1437 | |
e04aad61 | 1438 | .no_alias = true, |
07b0b134 ML |
1439 | .no_instances = true, |
1440 | ||
4e85aff4 | 1441 | .init = swap_init, |
07b0b134 | 1442 | .load = swap_load, |
6e620bec | 1443 | .done = swap_done, |
07b0b134 ML |
1444 | |
1445 | .coldplug = swap_coldplug, | |
1446 | ||
1447 | .dump = swap_dump, | |
1448 | ||
1449 | .start = swap_start, | |
1450 | .stop = swap_stop, | |
1451 | ||
8a0867d6 LP |
1452 | .kill = swap_kill, |
1453 | ||
68db7a3b ZJS |
1454 | .get_timeout = swap_get_timeout, |
1455 | ||
07b0b134 ML |
1456 | .serialize = swap_serialize, |
1457 | .deserialize_item = swap_deserialize_item, | |
1458 | ||
1459 | .active_state = swap_active_state, | |
1460 | .sub_state_to_string = swap_sub_state_to_string, | |
1461 | ||
1462 | .check_gc = swap_check_gc, | |
1463 | ||
e04aad61 | 1464 | .sigchld_event = swap_sigchld_event, |
e04aad61 LP |
1465 | |
1466 | .reset_failed = swap_reset_failed, | |
1467 | ||
c4e2ceae | 1468 | .bus_interface = "org.freedesktop.systemd1.Swap", |
718db961 | 1469 | .bus_vtable = bus_swap_vtable, |
74c964d3 LP |
1470 | .bus_set_property = bus_swap_set_property, |
1471 | .bus_commit_properties = bus_swap_commit_properties, | |
07b0b134 | 1472 | |
e04aad61 | 1473 | .following = swap_following, |
6210e7fc | 1474 | .following_set = swap_following_set, |
5632e374 | 1475 | |
6e620bec | 1476 | .enumerate = swap_enumerate, |
c6918296 MS |
1477 | .shutdown = swap_shutdown, |
1478 | ||
1479 | .status_message_formats = { | |
1480 | .starting_stopping = { | |
1481 | [0] = "Activating swap %s...", | |
1482 | [1] = "Deactivating swap %s...", | |
1483 | }, | |
1484 | .finished_start_job = { | |
1485 | [JOB_DONE] = "Activated swap %s.", | |
1486 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1487 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1488 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1489 | }, | |
1490 | .finished_stop_job = { | |
1491 | [JOB_DONE] = "Deactivated swap %s.", | |
1492 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1493 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1494 | }, | |
1495 | }, | |
07b0b134 | 1496 | }; |