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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 LP |
120 | |
121 | exec_context_init(&s->exec_context); | |
ac155bb8 MS |
122 | s->exec_context.std_output = u->manager->default_std_output; |
123 | s->exec_context.std_error = u->manager->default_std_error; | |
4819ff03 | 124 | kill_context_init(&s->kill_context); |
4ad49000 | 125 | cgroup_context_init(&s->cgroup_context); |
e04aad61 | 126 | |
6b1dc2bd | 127 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; |
e04aad61 | 128 | |
e1770af8 | 129 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; |
c8f4d764 | 130 | |
5bcb0f2b | 131 | u->ignore_on_isolate = true; |
e04aad61 LP |
132 | } |
133 | ||
134 | static void swap_unwatch_control_pid(Swap *s) { | |
135 | assert(s); | |
136 | ||
137 | if (s->control_pid <= 0) | |
138 | return; | |
139 | ||
140 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
141 | s->control_pid = 0; | |
6e620bec LP |
142 | } |
143 | ||
4e85aff4 LP |
144 | static void swap_done(Unit *u) { |
145 | Swap *s = SWAP(u); | |
07b0b134 | 146 | |
4e85aff4 | 147 | assert(s); |
07b0b134 | 148 | |
e04aad61 | 149 | swap_unset_proc_swaps(s); |
9670d583 | 150 | swap_set_devnode(s, NULL); |
e04aad61 | 151 | |
4e85aff4 | 152 | free(s->what); |
e04aad61 LP |
153 | s->what = NULL; |
154 | ||
4e85aff4 | 155 | free(s->parameters_fragment.what); |
6b1dc2bd | 156 | s->parameters_fragment.what = NULL; |
e04aad61 | 157 | |
613b411c LP |
158 | cgroup_context_done(&s->cgroup_context); |
159 | exec_context_done(&s->exec_context); | |
160 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
e04aad61 LP |
161 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); |
162 | s->control_command = NULL; | |
163 | ||
164 | swap_unwatch_control_pid(s); | |
165 | ||
718db961 LP |
166 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
167 | } | |
168 | ||
169 | static int swap_arm_timer(Swap *s) { | |
170 | int r; | |
171 | ||
172 | assert(s); | |
173 | ||
174 | if (s->timeout_usec <= 0) { | |
175 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | if (s->timer_event_source) { | |
180 | r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec); | |
181 | if (r < 0) | |
182 | return r; | |
183 | ||
184 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
185 | } | |
186 | ||
187 | return sd_event_add_monotonic(UNIT(s)->manager->event, now(CLOCK_MONOTONIC) + s->timeout_usec, 0, swap_dispatch_timer, s, &s->timer_event_source); | |
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) { |
646134dc ZJS |
306 | r = unit_add_exec_dependencies(u, &s->exec_context); |
307 | if (r < 0) | |
27abbe82 | 308 | return r; |
4e85aff4 | 309 | |
1124fe6f | 310 | if (UNIT(s)->fragment_path) |
4e85aff4 LP |
311 | s->from_fragment = true; |
312 | ||
313 | if (!s->what) { | |
314 | if (s->parameters_fragment.what) | |
315 | s->what = strdup(s->parameters_fragment.what); | |
4e85aff4 LP |
316 | else if (s->parameters_proc_swaps.what) |
317 | s->what = strdup(s->parameters_proc_swaps.what); | |
318 | else | |
ac155bb8 | 319 | s->what = unit_name_to_path(u->id); |
4e85aff4 LP |
320 | |
321 | if (!s->what) | |
07b0b134 | 322 | return -ENOMEM; |
4e85aff4 | 323 | } |
07b0b134 ML |
324 | |
325 | path_kill_slashes(s->what); | |
326 | ||
5bcb0f2b LP |
327 | if (!UNIT(s)->description) { |
328 | r = unit_set_description(u, s->what); | |
329 | if (r < 0) | |
4e85aff4 | 330 | return r; |
5bcb0f2b | 331 | } |
4e85aff4 | 332 | |
a57f7e2c | 333 | r = unit_require_mounts_for(UNIT(s), s->what); |
646134dc | 334 | if (r < 0) |
07b0b134 ML |
335 | return r; |
336 | ||
a57f7e2c | 337 | r = swap_add_device_links(s); |
646134dc | 338 | if (r < 0) |
6e2ef85b | 339 | return r; |
07b0b134 | 340 | |
9670d583 LP |
341 | r = swap_load_devnode(s); |
342 | if (r < 0) | |
343 | return r; | |
344 | ||
a016b922 LP |
345 | r = unit_add_default_slice(u); |
346 | if (r < 0) | |
347 | return r; | |
348 | ||
646134dc ZJS |
349 | if (UNIT(s)->default_dependencies) { |
350 | r = swap_add_default_dependencies(s); | |
351 | if (r < 0) | |
2edd4434 | 352 | return r; |
646134dc | 353 | } |
e06c73cc | 354 | |
cba6e062 | 355 | r = unit_exec_context_defaults(u, &s->exec_context); |
e06c73cc LP |
356 | if (r < 0) |
357 | return r; | |
07b0b134 ML |
358 | } |
359 | ||
360 | return swap_verify(s); | |
361 | } | |
362 | ||
6b1dc2bd | 363 | static int swap_add_one( |
4e85aff4 LP |
364 | Manager *m, |
365 | const char *what, | |
e04aad61 | 366 | const char *what_proc_swaps, |
4e85aff4 LP |
367 | int priority, |
368 | bool noauto, | |
173a8d04 | 369 | bool nofail, |
e04aad61 LP |
370 | bool set_flags) { |
371 | ||
7fd1b19b | 372 | _cleanup_free_ char *e = NULL; |
2c7c6144 | 373 | bool delete = false; |
5bcb0f2b | 374 | Unit *u = NULL; |
07b0b134 | 375 | int r; |
4e85aff4 LP |
376 | SwapParameters *p; |
377 | ||
378 | assert(m); | |
379 | assert(what); | |
6b1dc2bd | 380 | assert(what_proc_swaps); |
07b0b134 | 381 | |
7d17cfbc MS |
382 | e = unit_name_from_path(what, ".swap"); |
383 | if (!e) | |
170ca19e | 384 | return log_oom(); |
07b0b134 | 385 | |
e04aad61 LP |
386 | u = manager_get_unit(m, e); |
387 | ||
6b1dc2bd | 388 | if (u && |
e04aad61 LP |
389 | SWAP(u)->from_proc_swaps && |
390 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
391 | return -EEXIST; | |
4e85aff4 LP |
392 | |
393 | if (!u) { | |
07b0b134 ML |
394 | delete = true; |
395 | ||
7d17cfbc | 396 | u = unit_new(m, sizeof(Swap)); |
170ca19e ZJS |
397 | if (!u) |
398 | return log_oom(); | |
e04aad61 | 399 | |
7d17cfbc MS |
400 | r = unit_add_name(u, e); |
401 | if (r < 0) | |
e04aad61 LP |
402 | goto fail; |
403 | ||
7d17cfbc MS |
404 | SWAP(u)->what = strdup(what); |
405 | if (!SWAP(u)->what) { | |
646134dc | 406 | r = log_oom(); |
e04aad61 LP |
407 | goto fail; |
408 | } | |
409 | ||
410 | unit_add_to_load_queue(u); | |
4e85aff4 LP |
411 | } else |
412 | delete = false; | |
07b0b134 | 413 | |
6b1dc2bd | 414 | p = &SWAP(u)->parameters_proc_swaps; |
07b0b134 | 415 | |
6b1dc2bd | 416 | if (!p->what) { |
5bcb0f2b LP |
417 | p->what = strdup(what_proc_swaps); |
418 | if (!p->what) { | |
419 | r = -ENOMEM; | |
6b1dc2bd LP |
420 | goto fail; |
421 | } | |
6b1dc2bd | 422 | } |
e04aad61 | 423 | |
6b1dc2bd LP |
424 | if (set_flags) { |
425 | SWAP(u)->is_active = true; | |
426 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
4e85aff4 | 427 | } |
07b0b134 | 428 | |
6b1dc2bd LP |
429 | SWAP(u)->from_proc_swaps = true; |
430 | ||
4e85aff4 LP |
431 | p->priority = priority; |
432 | p->noauto = noauto; | |
173a8d04 | 433 | p->nofail = nofail; |
07b0b134 | 434 | |
4e85aff4 | 435 | unit_add_to_dbus_queue(u); |
07b0b134 | 436 | |
07b0b134 ML |
437 | return 0; |
438 | ||
439 | fail: | |
66870f90 | 440 | log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); |
e04aad61 | 441 | |
4e85aff4 | 442 | if (delete && u) |
07b0b134 ML |
443 | unit_free(u); |
444 | ||
4e85aff4 | 445 | return r; |
07b0b134 ML |
446 | } |
447 | ||
e04aad61 | 448 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { |
5bcb0f2b LP |
449 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; |
450 | struct udev_list_entry *item = NULL, *first = NULL; | |
451 | const char *dn; | |
e04aad61 | 452 | struct stat st; |
5bcb0f2b | 453 | int r; |
e04aad61 LP |
454 | |
455 | assert(m); | |
456 | ||
5bcb0f2b LP |
457 | r = swap_add_one(m, device, device, prio, false, false, set_flags); |
458 | if (r < 0) | |
459 | return r; | |
e04aad61 | 460 | |
5bcb0f2b LP |
461 | /* If this is a block device, then let's add duplicates for |
462 | * all other names of this block device */ | |
463 | if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode)) | |
464 | return 0; | |
e04aad61 | 465 | |
5bcb0f2b LP |
466 | d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); |
467 | if (!d) | |
468 | return 0; | |
e04aad61 | 469 | |
5bcb0f2b LP |
470 | /* Add the main device node */ |
471 | dn = udev_device_get_devnode(d); | |
472 | if (dn && !streq(dn, device)) | |
473 | swap_add_one(m, dn, device, prio, false, false, set_flags); | |
e04aad61 | 474 | |
5bcb0f2b LP |
475 | /* Add additional units for all symlinks */ |
476 | first = udev_device_get_devlinks_list_entry(d); | |
477 | udev_list_entry_foreach(item, first) { | |
478 | const char *p; | |
e04aad61 | 479 | |
5bcb0f2b LP |
480 | /* Don't bother with the /dev/block links */ |
481 | p = udev_list_entry_get_name(item); | |
e04aad61 | 482 | |
5bcb0f2b LP |
483 | if (streq(p, device)) |
484 | continue; | |
e04aad61 | 485 | |
5bcb0f2b LP |
486 | if (path_startswith(p, "/dev/block/")) |
487 | continue; | |
e04aad61 | 488 | |
5bcb0f2b LP |
489 | if (stat(p, &st) >= 0) |
490 | if (!S_ISBLK(st.st_mode) || | |
491 | st.st_rdev != udev_device_get_devnum(d)) | |
492 | continue; | |
e04aad61 | 493 | |
5bcb0f2b | 494 | swap_add_one(m, p, device, prio, false, false, set_flags); |
e04aad61 LP |
495 | } |
496 | ||
e04aad61 LP |
497 | return r; |
498 | } | |
499 | ||
07b0b134 ML |
500 | static void swap_set_state(Swap *s, SwapState state) { |
501 | SwapState old_state; | |
e04aad61 | 502 | |
07b0b134 ML |
503 | assert(s); |
504 | ||
505 | old_state = s->state; | |
506 | s->state = state; | |
507 | ||
e04aad61 LP |
508 | if (state != SWAP_ACTIVATING && |
509 | state != SWAP_ACTIVATING_SIGTERM && | |
510 | state != SWAP_ACTIVATING_SIGKILL && | |
5bcb0f2b | 511 | state != SWAP_ACTIVATING_DONE && |
e04aad61 LP |
512 | state != SWAP_DEACTIVATING && |
513 | state != SWAP_DEACTIVATING_SIGTERM && | |
514 | state != SWAP_DEACTIVATING_SIGKILL) { | |
718db961 | 515 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
516 | swap_unwatch_control_pid(s); |
517 | s->control_command = NULL; | |
518 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
519 | } | |
520 | ||
07b0b134 | 521 | if (state != old_state) |
66870f90 ZJS |
522 | log_debug_unit(UNIT(s)->id, |
523 | "%s changed %s -> %s", | |
524 | UNIT(s)->id, | |
525 | swap_state_to_string(old_state), | |
526 | swap_state_to_string(state)); | |
07b0b134 | 527 | |
5bcb0f2b | 528 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); |
07b0b134 ML |
529 | } |
530 | ||
531 | static int swap_coldplug(Unit *u) { | |
532 | Swap *s = SWAP(u); | |
533 | SwapState new_state = SWAP_DEAD; | |
e04aad61 | 534 | int r; |
07b0b134 ML |
535 | |
536 | assert(s); | |
537 | assert(s->state == SWAP_DEAD); | |
538 | ||
539 | if (s->deserialized_state != s->state) | |
540 | new_state = s->deserialized_state; | |
4e85aff4 | 541 | else if (s->from_proc_swaps) |
07b0b134 ML |
542 | new_state = SWAP_ACTIVE; |
543 | ||
5bcb0f2b LP |
544 | if (new_state == s->state) |
545 | return 0; | |
e04aad61 | 546 | |
5bcb0f2b LP |
547 | if (new_state == SWAP_ACTIVATING || |
548 | new_state == SWAP_ACTIVATING_SIGTERM || | |
549 | new_state == SWAP_ACTIVATING_SIGKILL || | |
550 | new_state == SWAP_ACTIVATING_DONE || | |
551 | new_state == SWAP_DEACTIVATING || | |
552 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
553 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
e04aad61 | 554 | |
5bcb0f2b LP |
555 | if (s->control_pid <= 0) |
556 | return -EBADMSG; | |
e04aad61 | 557 | |
5bcb0f2b LP |
558 | r = unit_watch_pid(UNIT(s), s->control_pid); |
559 | if (r < 0) | |
560 | return r; | |
e04aad61 | 561 | |
5bcb0f2b LP |
562 | r = swap_arm_timer(s); |
563 | if (r < 0) | |
564 | return r; | |
e04aad61 | 565 | } |
07b0b134 | 566 | |
5bcb0f2b | 567 | swap_set_state(s, new_state); |
07b0b134 ML |
568 | return 0; |
569 | } | |
570 | ||
571 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
572 | Swap *s = SWAP(u); | |
4e85aff4 | 573 | SwapParameters *p; |
07b0b134 ML |
574 | |
575 | assert(s); | |
4e85aff4 LP |
576 | assert(f); |
577 | ||
578 | if (s->from_proc_swaps) | |
579 | p = &s->parameters_proc_swaps; | |
580 | else if (s->from_fragment) | |
581 | p = &s->parameters_fragment; | |
b6bfc7bb LP |
582 | else |
583 | p = NULL; | |
07b0b134 ML |
584 | |
585 | fprintf(f, | |
4e85aff4 | 586 | "%sSwap State: %s\n" |
e1770af8 | 587 | "%sResult: %s\n" |
07b0b134 | 588 | "%sWhat: %s\n" |
4e85aff4 LP |
589 | "%sFrom /proc/swaps: %s\n" |
590 | "%sFrom fragment: %s\n", | |
07b0b134 | 591 | prefix, swap_state_to_string(s->state), |
e1770af8 | 592 | prefix, swap_result_to_string(s->result), |
07b0b134 | 593 | prefix, s->what, |
4e85aff4 LP |
594 | prefix, yes_no(s->from_proc_swaps), |
595 | prefix, yes_no(s->from_fragment)); | |
e04aad61 | 596 | |
9670d583 LP |
597 | if (s->devnode) |
598 | fprintf(f, "%sDevice Node: %s\n", prefix, s->devnode); | |
599 | ||
b6bfc7bb LP |
600 | if (p) |
601 | fprintf(f, | |
602 | "%sPriority: %i\n" | |
603 | "%sNoAuto: %s\n" | |
604 | "%sNoFail: %s\n", | |
605 | prefix, p->priority, | |
606 | prefix, yes_no(p->noauto), | |
607 | prefix, yes_no(p->nofail)); | |
608 | ||
e04aad61 LP |
609 | if (s->control_pid > 0) |
610 | fprintf(f, | |
611 | "%sControl PID: %lu\n", | |
612 | prefix, (unsigned long) s->control_pid); | |
613 | ||
614 | exec_context_dump(&s->exec_context, f, prefix); | |
4819ff03 | 615 | kill_context_dump(&s->kill_context, f, prefix); |
e04aad61 LP |
616 | } |
617 | ||
618 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
619 | pid_t pid; | |
620 | int r; | |
621 | ||
622 | assert(s); | |
623 | assert(c); | |
624 | assert(_pid); | |
625 | ||
4ad49000 LP |
626 | unit_realize_cgroup(UNIT(s)); |
627 | ||
613b411c LP |
628 | r = unit_setup_exec_runtime(UNIT(s)); |
629 | if (r < 0) | |
630 | goto fail; | |
631 | ||
718db961 | 632 | r = swap_arm_timer(s); |
646134dc | 633 | if (r < 0) |
e04aad61 LP |
634 | goto fail; |
635 | ||
646134dc ZJS |
636 | r = exec_spawn(c, |
637 | NULL, | |
638 | &s->exec_context, | |
639 | NULL, 0, | |
640 | UNIT(s)->manager->environment, | |
641 | true, | |
642 | true, | |
643 | true, | |
644 | UNIT(s)->manager->confirm_spawn, | |
13b84ec7 | 645 | UNIT(s)->manager->cgroup_supported, |
4ad49000 | 646 | UNIT(s)->cgroup_path, |
646134dc | 647 | UNIT(s)->id, |
09812eb7 | 648 | 0, |
646134dc | 649 | NULL, |
613b411c | 650 | s->exec_runtime, |
646134dc ZJS |
651 | &pid); |
652 | if (r < 0) | |
e04aad61 LP |
653 | goto fail; |
654 | ||
646134dc ZJS |
655 | r = unit_watch_pid(UNIT(s), pid); |
656 | if (r < 0) | |
e04aad61 LP |
657 | /* FIXME: we need to do something here */ |
658 | goto fail; | |
659 | ||
660 | *_pid = pid; | |
661 | ||
662 | return 0; | |
663 | ||
664 | fail: | |
718db961 | 665 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
666 | |
667 | return r; | |
07b0b134 ML |
668 | } |
669 | ||
e1770af8 | 670 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
671 | assert(s); |
672 | ||
e1770af8 LP |
673 | if (f != SWAP_SUCCESS) |
674 | s->result = f; | |
e04aad61 | 675 | |
613b411c LP |
676 | exec_runtime_destroy(s->exec_runtime); |
677 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
678 | ||
e1770af8 | 679 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
680 | } |
681 | ||
e1770af8 | 682 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
683 | assert(s); |
684 | ||
e1770af8 LP |
685 | if (f != SWAP_SUCCESS) |
686 | s->result = f; | |
e04aad61 LP |
687 | |
688 | swap_set_state(s, SWAP_ACTIVE); | |
689 | } | |
690 | ||
e1770af8 | 691 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 ML |
692 | int r; |
693 | ||
694 | assert(s); | |
e04aad61 | 695 | |
e1770af8 LP |
696 | if (f != SWAP_SUCCESS) |
697 | s->result = f; | |
e04aad61 | 698 | |
cd2086fe LP |
699 | r = unit_kill_context( |
700 | UNIT(s), | |
701 | &s->kill_context, | |
702 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
703 | -1, | |
704 | s->control_pid, | |
705 | false); | |
706 | if (r < 0) | |
707 | goto fail; | |
e04aad61 | 708 | |
cd2086fe | 709 | if (r > 0) { |
718db961 | 710 | r = swap_arm_timer(s); |
646134dc | 711 | if (r < 0) |
e04aad61 LP |
712 | goto fail; |
713 | ||
714 | swap_set_state(s, state); | |
715 | } else | |
e1770af8 | 716 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
717 | |
718 | return; | |
719 | ||
720 | fail: | |
66870f90 ZJS |
721 | log_warning_unit(UNIT(s)->id, |
722 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
e04aad61 | 723 | |
e1770af8 | 724 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
725 | } |
726 | ||
727 | static void swap_enter_activating(Swap *s) { | |
728 | int r, priority; | |
729 | ||
730 | assert(s); | |
731 | ||
732 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
733 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 734 | |
4e85aff4 LP |
735 | if (s->from_fragment) |
736 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
737 | else |
738 | priority = -1; | |
4e85aff4 | 739 | |
e04aad61 | 740 | if (priority >= 0) { |
5bcb0f2b | 741 | char p[DECIMAL_STR_MAX(int)]; |
07b0b134 | 742 | |
5bcb0f2b | 743 | sprintf(p, "%i", priority); |
07b0b134 | 744 | |
e04aad61 LP |
745 | r = exec_command_set( |
746 | s->control_command, | |
747 | "/sbin/swapon", | |
748 | "-p", | |
749 | p, | |
750 | s->what, | |
751 | NULL); | |
752 | } else | |
753 | r = exec_command_set( | |
754 | s->control_command, | |
755 | "/sbin/swapon", | |
756 | s->what, | |
757 | NULL); | |
758 | ||
759 | if (r < 0) | |
760 | goto fail; | |
761 | ||
762 | swap_unwatch_control_pid(s); | |
763 | ||
646134dc ZJS |
764 | r = swap_spawn(s, s->control_command, &s->control_pid); |
765 | if (r < 0) | |
e04aad61 LP |
766 | goto fail; |
767 | ||
768 | swap_set_state(s, SWAP_ACTIVATING); | |
769 | ||
770 | return; | |
771 | ||
772 | fail: | |
66870f90 ZJS |
773 | log_warning_unit(UNIT(s)->id, |
774 | "%s failed to run 'swapon' task: %s", | |
775 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 776 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
777 | } |
778 | ||
e1770af8 | 779 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
780 | int r; |
781 | ||
782 | assert(s); | |
783 | ||
e04aad61 LP |
784 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
785 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
786 | ||
646134dc | 787 | r = exec_command_set(s->control_command, |
e04aad61 LP |
788 | "/sbin/swapoff", |
789 | s->what, | |
646134dc ZJS |
790 | NULL); |
791 | if (r < 0) | |
e04aad61 LP |
792 | goto fail; |
793 | ||
794 | swap_unwatch_control_pid(s); | |
795 | ||
646134dc ZJS |
796 | r = swap_spawn(s, s->control_command, &s->control_pid); |
797 | if (r < 0) | |
e04aad61 LP |
798 | goto fail; |
799 | ||
800 | swap_set_state(s, SWAP_DEACTIVATING); | |
801 | ||
802 | return; | |
803 | ||
804 | fail: | |
66870f90 ZJS |
805 | log_warning_unit(UNIT(s)->id, |
806 | "%s failed to run 'swapoff' task: %s", | |
807 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 808 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
809 | } |
810 | ||
811 | static int swap_start(Unit *u) { | |
812 | Swap *s = SWAP(u); | |
813 | ||
814 | assert(s); | |
815 | ||
816 | /* We cannot fulfill this request right now, try again later | |
817 | * please! */ | |
818 | ||
819 | if (s->state == SWAP_DEACTIVATING || | |
820 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
821 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
822 | s->state == SWAP_ACTIVATING_SIGTERM || | |
823 | s->state == SWAP_ACTIVATING_SIGKILL) | |
824 | return -EAGAIN; | |
825 | ||
826 | if (s->state == SWAP_ACTIVATING) | |
827 | return 0; | |
828 | ||
829 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
830 | ||
a5c3034f LP |
831 | if (detect_container(NULL) > 0) |
832 | return -EPERM; | |
833 | ||
e1770af8 | 834 | s->result = SWAP_SUCCESS; |
e04aad61 | 835 | swap_enter_activating(s); |
07b0b134 ML |
836 | return 0; |
837 | } | |
838 | ||
839 | static int swap_stop(Unit *u) { | |
840 | Swap *s = SWAP(u); | |
07b0b134 ML |
841 | |
842 | assert(s); | |
843 | ||
e04aad61 LP |
844 | if (s->state == SWAP_DEACTIVATING || |
845 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
846 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
847 | s->state == SWAP_ACTIVATING_SIGTERM || | |
848 | s->state == SWAP_ACTIVATING_SIGKILL) | |
849 | return 0; | |
07b0b134 | 850 | |
e04aad61 | 851 | assert(s->state == SWAP_ACTIVATING || |
5bcb0f2b | 852 | s->state == SWAP_ACTIVATING_DONE || |
e04aad61 | 853 | s->state == SWAP_ACTIVE); |
07b0b134 | 854 | |
a5c3034f LP |
855 | if (detect_container(NULL) > 0) |
856 | return -EPERM; | |
857 | ||
e1770af8 | 858 | swap_enter_deactivating(s); |
07b0b134 ML |
859 | return 0; |
860 | } | |
861 | ||
862 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
863 | Swap *s = SWAP(u); | |
864 | ||
865 | assert(s); | |
866 | assert(f); | |
867 | assert(fds); | |
868 | ||
869 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 870 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
871 | |
872 | if (s->control_pid > 0) | |
873 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
874 | ||
875 | if (s->control_command_id >= 0) | |
876 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 ML |
877 | |
878 | return 0; | |
879 | } | |
880 | ||
881 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
882 | Swap *s = SWAP(u); | |
883 | ||
884 | assert(s); | |
885 | assert(fds); | |
886 | ||
887 | if (streq(key, "state")) { | |
888 | SwapState state; | |
889 | ||
646134dc ZJS |
890 | state = swap_state_from_string(value); |
891 | if (state < 0) | |
66870f90 | 892 | log_debug_unit(u->id, "Failed to parse state value %s", value); |
07b0b134 ML |
893 | else |
894 | s->deserialized_state = state; | |
e1770af8 LP |
895 | } else if (streq(key, "result")) { |
896 | SwapResult f; | |
897 | ||
898 | f = swap_result_from_string(value); | |
899 | if (f < 0) | |
66870f90 | 900 | log_debug_unit(u->id, "Failed to parse result value %s", value); |
e1770af8 LP |
901 | else if (f != SWAP_SUCCESS) |
902 | s->result = f; | |
e04aad61 LP |
903 | } else if (streq(key, "control-pid")) { |
904 | pid_t pid; | |
905 | ||
906 | if (parse_pid(value, &pid) < 0) | |
66870f90 | 907 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); |
e04aad61 LP |
908 | else |
909 | s->control_pid = pid; | |
910 | ||
911 | } else if (streq(key, "control-command")) { | |
912 | SwapExecCommand id; | |
913 | ||
646134dc ZJS |
914 | id = swap_exec_command_from_string(value); |
915 | if (id < 0) | |
66870f90 | 916 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); |
e04aad61 LP |
917 | else { |
918 | s->control_command_id = id; | |
919 | s->control_command = s->exec_command + id; | |
920 | } | |
07b0b134 | 921 | } else |
66870f90 | 922 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); |
07b0b134 ML |
923 | |
924 | return 0; | |
925 | } | |
926 | ||
44a6b1b6 | 927 | _pure_ static UnitActiveState swap_active_state(Unit *u) { |
07b0b134 ML |
928 | assert(u); |
929 | ||
930 | return state_translation_table[SWAP(u)->state]; | |
931 | } | |
932 | ||
44a6b1b6 | 933 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { |
07b0b134 ML |
934 | assert(u); |
935 | ||
936 | return swap_state_to_string(SWAP(u)->state); | |
937 | } | |
938 | ||
44a6b1b6 | 939 | _pure_ static bool swap_check_gc(Unit *u) { |
07b0b134 ML |
940 | Swap *s = SWAP(u); |
941 | ||
942 | assert(s); | |
943 | ||
6b1dc2bd | 944 | return s->from_proc_swaps; |
07b0b134 ML |
945 | } |
946 | ||
e04aad61 LP |
947 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
948 | Swap *s = SWAP(u); | |
e1770af8 | 949 | SwapResult f; |
e04aad61 LP |
950 | |
951 | assert(s); | |
952 | assert(pid >= 0); | |
953 | ||
954 | if (pid != s->control_pid) | |
955 | return; | |
956 | ||
957 | s->control_pid = 0; | |
958 | ||
96342de6 | 959 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
960 | f = SWAP_SUCCESS; |
961 | else if (code == CLD_EXITED) | |
962 | f = SWAP_FAILURE_EXIT_CODE; | |
963 | else if (code == CLD_KILLED) | |
964 | f = SWAP_FAILURE_SIGNAL; | |
965 | else if (code == CLD_DUMPED) | |
966 | f = SWAP_FAILURE_CORE_DUMP; | |
967 | else | |
968 | assert_not_reached("Unknown code"); | |
969 | ||
970 | if (f != SWAP_SUCCESS) | |
971 | s->result = f; | |
e04aad61 LP |
972 | |
973 | if (s->control_command) { | |
6ea832a2 | 974 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 975 | |
e04aad61 LP |
976 | s->control_command = NULL; |
977 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
978 | } | |
979 | ||
66870f90 ZJS |
980 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
981 | u->id, | |
982 | "%s swap process exited, code=%s status=%i", | |
983 | u->id, sigchld_code_to_string(code), status); | |
e04aad61 LP |
984 | |
985 | switch (s->state) { | |
986 | ||
987 | case SWAP_ACTIVATING: | |
5bcb0f2b | 988 | case SWAP_ACTIVATING_DONE: |
e04aad61 LP |
989 | case SWAP_ACTIVATING_SIGTERM: |
990 | case SWAP_ACTIVATING_SIGKILL: | |
991 | ||
e1770af8 LP |
992 | if (f == SWAP_SUCCESS) |
993 | swap_enter_active(s, f); | |
e04aad61 | 994 | else |
e1770af8 | 995 | swap_enter_dead(s, f); |
e04aad61 LP |
996 | break; |
997 | ||
998 | case SWAP_DEACTIVATING: | |
999 | case SWAP_DEACTIVATING_SIGKILL: | |
1000 | case SWAP_DEACTIVATING_SIGTERM: | |
1001 | ||
e1770af8 LP |
1002 | if (f == SWAP_SUCCESS) |
1003 | swap_enter_dead(s, f); | |
e04aad61 | 1004 | else |
e1770af8 | 1005 | swap_enter_dead(s, f); |
e04aad61 LP |
1006 | break; |
1007 | ||
1008 | default: | |
1009 | assert_not_reached("Uh, control process died at wrong time."); | |
1010 | } | |
1011 | ||
1012 | /* Notify clients about changed exit status */ | |
1013 | unit_add_to_dbus_queue(u); | |
e04aad61 LP |
1014 | } |
1015 | ||
718db961 LP |
1016 | static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1017 | Swap *s = SWAP(userdata); | |
e04aad61 LP |
1018 | |
1019 | assert(s); | |
718db961 | 1020 | assert(s->timer_event_source == source); |
e04aad61 LP |
1021 | |
1022 | switch (s->state) { | |
1023 | ||
1024 | case SWAP_ACTIVATING: | |
5bcb0f2b | 1025 | case SWAP_ACTIVATING_DONE: |
718db961 | 1026 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1027 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1028 | break; |
1029 | ||
1030 | case SWAP_DEACTIVATING: | |
718db961 | 1031 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1032 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1033 | break; |
1034 | ||
1035 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1036 | if (s->kill_context.send_sigkill) { |
718db961 | 1037 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1038 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1039 | } else { |
718db961 | 1040 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1041 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1042 | } |
e04aad61 LP |
1043 | break; |
1044 | ||
1045 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1046 | if (s->kill_context.send_sigkill) { |
718db961 | 1047 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1048 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1049 | } else { |
718db961 | 1050 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1051 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1052 | } |
e04aad61 LP |
1053 | break; |
1054 | ||
1055 | case SWAP_ACTIVATING_SIGKILL: | |
1056 | case SWAP_DEACTIVATING_SIGKILL: | |
718db961 | 1057 | log_warning_unit(UNIT(s)->id, "%s swap process still around after SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1058 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1059 | break; |
1060 | ||
1061 | default: | |
1062 | assert_not_reached("Timeout at wrong time."); | |
1063 | } | |
718db961 LP |
1064 | |
1065 | return 0; | |
e04aad61 LP |
1066 | } |
1067 | ||
1068 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1069 | unsigned i; | |
1070 | int r = 0; | |
1071 | ||
1072 | assert(m); | |
1073 | ||
07b0b134 | 1074 | rewind(m->proc_swaps); |
bab45044 | 1075 | |
4e85aff4 | 1076 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1077 | |
e04aad61 | 1078 | for (i = 1;; i++) { |
9fb3675e | 1079 | _cleanup_free_ char *dev = NULL, *d = NULL; |
07b0b134 ML |
1080 | int prio = 0, k; |
1081 | ||
646134dc ZJS |
1082 | k = fscanf(m->proc_swaps, |
1083 | "%ms " /* device/file */ | |
1084 | "%*s " /* type of swap */ | |
1085 | "%*s " /* swap size */ | |
1086 | "%*s " /* used */ | |
1087 | "%i\n", /* priority */ | |
1088 | &dev, &prio); | |
1089 | if (k != 2) { | |
07b0b134 | 1090 | if (k == EOF) |
4e85aff4 | 1091 | break; |
07b0b134 | 1092 | |
646134dc | 1093 | log_warning("Failed to parse /proc/swaps:%u", i); |
e04aad61 | 1094 | continue; |
07b0b134 | 1095 | } |
07b0b134 | 1096 | |
4e85aff4 | 1097 | d = cunescape(dev); |
4e85aff4 LP |
1098 | if (!d) |
1099 | return -ENOMEM; | |
1100 | ||
e04aad61 | 1101 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 | 1102 | if (k < 0) |
e04aad61 | 1103 | r = k; |
07b0b134 ML |
1104 | } |
1105 | ||
e04aad61 LP |
1106 | return r; |
1107 | } | |
1108 | ||
718db961 LP |
1109 | static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
1110 | Manager *m = userdata; | |
595ed347 | 1111 | Unit *u; |
4e434314 LP |
1112 | int r; |
1113 | ||
1114 | assert(m); | |
718db961 | 1115 | assert(revents & EPOLLPRI); |
4e434314 | 1116 | |
646134dc ZJS |
1117 | r = swap_load_proc_swaps(m, true); |
1118 | if (r < 0) { | |
e04aad61 LP |
1119 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1120 | ||
1121 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1122 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1123 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1124 | |
1125 | swap->is_active = swap->just_activated = false; | |
1126 | } | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | manager_dispatch_load_queue(m); | |
1132 | ||
595ed347 MS |
1133 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1134 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1135 | |
1136 | if (!swap->is_active) { | |
1137 | /* This has just been deactivated */ | |
1138 | ||
e04aad61 LP |
1139 | swap_unset_proc_swaps(swap); |
1140 | ||
1141 | switch (swap->state) { | |
1142 | ||
1143 | case SWAP_ACTIVE: | |
e1770af8 | 1144 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1145 | break; |
1146 | ||
1147 | default: | |
5bcb0f2b | 1148 | /* Fire again */ |
e04aad61 LP |
1149 | swap_set_state(swap, swap->state); |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | } else if (swap->just_activated) { | |
1154 | ||
1155 | /* New swap entry */ | |
1156 | ||
1157 | switch (swap->state) { | |
1158 | ||
1159 | case SWAP_DEAD: | |
1160 | case SWAP_FAILED: | |
e1770af8 | 1161 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1162 | break; |
1163 | ||
5bcb0f2b LP |
1164 | case SWAP_ACTIVATING: |
1165 | swap_set_state(swap, SWAP_ACTIVATING_DONE); | |
1166 | break; | |
1167 | ||
e04aad61 LP |
1168 | default: |
1169 | /* Nothing really changed, but let's | |
1170 | * issue an notification call | |
1171 | * nonetheless, in case somebody is | |
1172 | * waiting for this. */ | |
1173 | swap_set_state(swap, swap->state); | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | /* Reset the flags for later calls */ | |
1179 | swap->is_active = swap->just_activated = false; | |
1180 | } | |
1181 | ||
1182 | return 1; | |
1183 | } | |
1184 | ||
1185 | static Unit *swap_following(Unit *u) { | |
1186 | Swap *s = SWAP(u); | |
1187 | Swap *other, *first = NULL; | |
1188 | ||
1189 | assert(s); | |
1190 | ||
9670d583 | 1191 | if (streq_ptr(s->what, s->devnode)) |
e04aad61 LP |
1192 | return NULL; |
1193 | ||
1194 | /* Make everybody follow the unit that's named after the swap | |
1195 | * device in the kernel */ | |
1196 | ||
9670d583 LP |
1197 | LIST_FOREACH_AFTER(same_devnode, other, s) |
1198 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1199 | return UNIT(other); |
1200 | ||
9670d583 LP |
1201 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
1202 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1203 | return UNIT(other); |
1204 | ||
1205 | first = other; | |
1206 | } | |
1207 | ||
1208 | return UNIT(first); | |
07b0b134 ML |
1209 | } |
1210 | ||
6210e7fc | 1211 | static int swap_following_set(Unit *u, Set **_set) { |
5bcb0f2b | 1212 | Swap *s = SWAP(u), *other; |
6210e7fc LP |
1213 | Set *set; |
1214 | int r; | |
1215 | ||
1216 | assert(s); | |
1217 | assert(_set); | |
1218 | ||
9670d583 | 1219 | if (LIST_JUST_US(same_devnode, s)) { |
6210e7fc LP |
1220 | *_set = NULL; |
1221 | return 0; | |
1222 | } | |
1223 | ||
5bcb0f2b LP |
1224 | set = set_new(NULL, NULL); |
1225 | if (!set) | |
6210e7fc LP |
1226 | return -ENOMEM; |
1227 | ||
9670d583 | 1228 | LIST_FOREACH_AFTER(same_devnode, other, s) { |
5bcb0f2b LP |
1229 | r = set_put(set, other); |
1230 | if (r < 0) | |
6210e7fc | 1231 | goto fail; |
5bcb0f2b | 1232 | } |
6210e7fc | 1233 | |
9670d583 | 1234 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
5bcb0f2b LP |
1235 | r = set_put(set, other); |
1236 | if (r < 0) | |
6210e7fc | 1237 | goto fail; |
5bcb0f2b | 1238 | } |
6210e7fc LP |
1239 | |
1240 | *_set = set; | |
1241 | return 1; | |
1242 | ||
1243 | fail: | |
1244 | set_free(set); | |
1245 | return r; | |
1246 | } | |
1247 | ||
07b0b134 ML |
1248 | static void swap_shutdown(Manager *m) { |
1249 | assert(m); | |
1250 | ||
718db961 LP |
1251 | m->swap_event_source = sd_event_source_unref(m->swap_event_source); |
1252 | ||
07b0b134 ML |
1253 | if (m->proc_swaps) { |
1254 | fclose(m->proc_swaps); | |
1255 | m->proc_swaps = NULL; | |
1256 | } | |
e04aad61 | 1257 | |
9670d583 LP |
1258 | hashmap_free(m->swaps_by_devnode); |
1259 | m->swaps_by_devnode = NULL; | |
07b0b134 ML |
1260 | } |
1261 | ||
07b0b134 ML |
1262 | static int swap_enumerate(Manager *m) { |
1263 | int r; | |
9670d583 | 1264 | |
07b0b134 ML |
1265 | assert(m); |
1266 | ||
4e434314 | 1267 | if (!m->proc_swaps) { |
646134dc ZJS |
1268 | m->proc_swaps = fopen("/proc/swaps", "re"); |
1269 | if (!m->proc_swaps) | |
718db961 | 1270 | return errno == ENOENT ? 0 : -errno; |
4e434314 | 1271 | |
718db961 LP |
1272 | r = sd_event_add_io(m->event, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m, &m->swap_event_source); |
1273 | if (r < 0) | |
29083707 LP |
1274 | goto fail; |
1275 | ||
1276 | /* Dispatch this before we dispatch SIGCHLD, so that | |
1277 | * we always get the events from /proc/swaps before | |
1278 | * the SIGCHLD of /sbin/swapon. */ | |
1279 | r = sd_event_source_set_priority(m->swap_event_source, -10); | |
1280 | if (r < 0) | |
718db961 | 1281 | goto fail; |
4e434314 LP |
1282 | } |
1283 | ||
646134dc ZJS |
1284 | r = swap_load_proc_swaps(m, false); |
1285 | if (r < 0) | |
718db961 LP |
1286 | goto fail; |
1287 | ||
1288 | return 0; | |
07b0b134 | 1289 | |
718db961 LP |
1290 | fail: |
1291 | swap_shutdown(m); | |
07b0b134 ML |
1292 | return r; |
1293 | } | |
1294 | ||
9670d583 LP |
1295 | int swap_process_new_device(Manager *m, struct udev_device *dev) { |
1296 | struct udev_list_entry *item = NULL, *first = NULL; | |
1297 | _cleanup_free_ char *e = NULL; | |
1298 | const char *dn; | |
1299 | Swap *s; | |
1300 | int r = 0; | |
1301 | ||
1302 | assert(m); | |
1303 | assert(dev); | |
1304 | ||
1305 | dn = udev_device_get_devnode(dev); | |
1306 | if (!dn) | |
1307 | return 0; | |
1308 | ||
1309 | e = unit_name_from_path(dn, ".swap"); | |
1310 | if (!e) | |
1311 | return -ENOMEM; | |
1312 | ||
1313 | s = hashmap_get(m->units, e); | |
1314 | if (s) | |
1315 | r = swap_set_devnode(s, dn); | |
1316 | ||
1317 | first = udev_device_get_devlinks_list_entry(dev); | |
1318 | udev_list_entry_foreach(item, first) { | |
1319 | _cleanup_free_ char *n = NULL; | |
1320 | ||
1321 | n = unit_name_from_path(udev_list_entry_get_name(item), ".swap"); | |
1322 | if (!n) | |
1323 | return -ENOMEM; | |
1324 | ||
1325 | s = hashmap_get(m->units, n); | |
1326 | if (s) { | |
1327 | int q; | |
1328 | ||
1329 | q = swap_set_devnode(s, dn); | |
1330 | if (q < 0) | |
1331 | r = q; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | return r; | |
1336 | } | |
1337 | ||
1338 | int swap_process_removed_device(Manager *m, struct udev_device *dev) { | |
9670d583 LP |
1339 | const char *dn; |
1340 | int r = 0; | |
1341 | Swap *s; | |
1342 | ||
1343 | dn = udev_device_get_devnode(dev); | |
1344 | if (!dn) | |
1345 | return 0; | |
1346 | ||
1347 | while ((s = hashmap_get(m->swaps_by_devnode, dn))) { | |
1348 | int q; | |
1349 | ||
1350 | q = swap_set_devnode(s, NULL); | |
1351 | if (q < 0) | |
1352 | r = q; | |
1353 | } | |
1354 | ||
1355 | return r; | |
1356 | } | |
1357 | ||
fdf20a31 | 1358 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1359 | Swap *s = SWAP(u); |
1360 | ||
1361 | assert(s); | |
1362 | ||
fdf20a31 | 1363 | if (s->state == SWAP_FAILED) |
5632e374 | 1364 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1365 | |
e1770af8 | 1366 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1367 | } |
1368 | ||
718db961 | 1369 | static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1370 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); |
8a0867d6 LP |
1371 | } |
1372 | ||
5632e374 LP |
1373 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1374 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1375 | [SWAP_ACTIVATING] = "activating", |
5bcb0f2b | 1376 | [SWAP_ACTIVATING_DONE] = "activating-done", |
5632e374 | 1377 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1378 | [SWAP_DEACTIVATING] = "deactivating", |
1379 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1380 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1381 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1382 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1383 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1384 | }; |
1385 | ||
1386 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1387 | ||
e04aad61 LP |
1388 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1389 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1390 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1391 | }; | |
1392 | ||
1393 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1394 | ||
e1770af8 LP |
1395 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1396 | [SWAP_SUCCESS] = "success", | |
1397 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1398 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1399 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1400 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1401 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1402 | }; | |
1403 | ||
1404 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1405 | ||
07b0b134 | 1406 | const UnitVTable swap_vtable = { |
7d17cfbc | 1407 | .object_size = sizeof(Swap), |
718db961 LP |
1408 | .exec_context_offset = offsetof(Swap, exec_context), |
1409 | .cgroup_context_offset = offsetof(Swap, cgroup_context), | |
1410 | .kill_context_offset = offsetof(Swap, kill_context), | |
613b411c | 1411 | .exec_runtime_offset = offsetof(Swap, exec_runtime), |
3ef63c31 | 1412 | |
f975e971 LP |
1413 | .sections = |
1414 | "Unit\0" | |
1415 | "Swap\0" | |
1416 | "Install\0", | |
4ad49000 | 1417 | .private_section = "Swap", |
71645aca | 1418 | |
e04aad61 | 1419 | .no_alias = true, |
07b0b134 ML |
1420 | .no_instances = true, |
1421 | ||
4e85aff4 | 1422 | .init = swap_init, |
07b0b134 | 1423 | .load = swap_load, |
6e620bec | 1424 | .done = swap_done, |
07b0b134 ML |
1425 | |
1426 | .coldplug = swap_coldplug, | |
1427 | ||
1428 | .dump = swap_dump, | |
1429 | ||
1430 | .start = swap_start, | |
1431 | .stop = swap_stop, | |
1432 | ||
8a0867d6 LP |
1433 | .kill = swap_kill, |
1434 | ||
07b0b134 ML |
1435 | .serialize = swap_serialize, |
1436 | .deserialize_item = swap_deserialize_item, | |
1437 | ||
1438 | .active_state = swap_active_state, | |
1439 | .sub_state_to_string = swap_sub_state_to_string, | |
1440 | ||
1441 | .check_gc = swap_check_gc, | |
1442 | ||
e04aad61 | 1443 | .sigchld_event = swap_sigchld_event, |
e04aad61 LP |
1444 | |
1445 | .reset_failed = swap_reset_failed, | |
1446 | ||
c4e2ceae | 1447 | .bus_interface = "org.freedesktop.systemd1.Swap", |
718db961 | 1448 | .bus_vtable = bus_swap_vtable, |
74c964d3 LP |
1449 | .bus_set_property = bus_swap_set_property, |
1450 | .bus_commit_properties = bus_swap_commit_properties, | |
07b0b134 | 1451 | |
e04aad61 | 1452 | .following = swap_following, |
6210e7fc | 1453 | .following_set = swap_following_set, |
5632e374 | 1454 | |
6e620bec | 1455 | .enumerate = swap_enumerate, |
c6918296 MS |
1456 | .shutdown = swap_shutdown, |
1457 | ||
1458 | .status_message_formats = { | |
1459 | .starting_stopping = { | |
1460 | [0] = "Activating swap %s...", | |
1461 | [1] = "Deactivating swap %s...", | |
1462 | }, | |
1463 | .finished_start_job = { | |
1464 | [JOB_DONE] = "Activated swap %s.", | |
1465 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1466 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1467 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1468 | }, | |
1469 | .finished_stop_job = { | |
1470 | [JOB_DONE] = "Deactivated swap %s.", | |
1471 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1472 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1473 | }, | |
1474 | }, | |
07b0b134 | 1475 | }; |